Merge pull request #766 from trapexit/ini

rework config management

Makefile

@@ -40,9 +40,9 @@ USE_XATTR = 1
 UGID_USE_RWLOCK = 0
 
 ifeq ($(DEBUG),1)
-DEBUG_FLAGS := -O0 -g
+OPT_FLAGS := -O0 -g
 else
-DEBUG_FLAGS :=
+OPT_FLAGS := -O2
 endif
 
 ifeq ($(STATIC),1)
@@ -62,8 +62,8 @@ OBJS        = $(SRC:src/%.cpp=build/%.o)
 DEPS        = $(SRC:src/%.cpp=build/%.d)
 MANPAGE     = mergerfs.1
 CXXFLAGS    = \
-              -O2 \
-              $(DEBUG_FLAGS) \
+              -std=c++0x \
+              $(OPT_FLAGS) \
               $(STATIC_FLAGS) \
               $(LTO_FLAGS) \
               -Wall \
@@ -230,6 +230,6 @@ install-build-pkgs:
 
 .PHONY: libfuse
 libfuse:
-	$(MAKE) -C libfuse
+	$(MAKE) DEBUG=$(DEBUG) -C libfuse
 
 -include $(DEPS)

README.md

@@ -92,6 +92,8 @@ See the mergerfs [wiki for real world deployments](https://github.com/trapexit/m
 
 ### mount options
 
+* **config**: Path to a config file. Same arguments as below in key=val format.
+* **branches**: Colon delimited list of branches.
 * **allow_other**: A libfuse option which allows users besides the one which ran mergerfs to see the filesystem. This is required for most use-cases.
 * **minfreespace=SIZE**: The minimum space value used for creation policies. Understands 'K', 'M', and 'G' to represent kilobyte, megabyte, and gigabyte respectively. (default: 4G)
 * **moveonenospc=BOOL**: When enabled if a **write** fails with **ENOSPC** (no space left on device) or **EDQUOT** (disk quota exceeded) a scan of all drives will be done looking for the drive with the most free space which is at least the size of the file plus the amount which failed to write. An attempt to move the file to that drive will occur (keeping all metadata possible) and if successful the original is unlinked and the write retried. (default: false)
@@ -402,7 +404,41 @@ make LTO=1            - build with link time optimization
 
 # RUNTIME CONFIG
 
-#### .mergerfs pseudo file ####
+#### ioctl
+
+The original runtime config API was via xattr calls. This however became an issue when needing to disable xattr. While slightly less convenient ioctl does not have the same problems and will be the main API going forward.
+
+The keys are the same as the command line option arguments as well as the config file.
+
+##### requests / commands
+
+All commands take a 4096 byte char buffer.
+
+* read keys: get a nul '\0' delimited list of option keys
+  * _IOWR(0xDF,0,char[4096]) = 0xD000DF00
+  * on success ioctl return value is the total length
+* read value: get an option value
+  * _IOWR(0xDF,1,char[4096]) = 0xD000DF01
+  * the key is passed in via the char buffer as a nul '\0' terminated string
+  * on success ioctl return value is the total length
+* write value: set an option value
+  * _IOW(0xDF,2,char[4096]) = 0x5000DF02
+  * the key and value is passed in via the char buffer as a nul '\0' terminated string in the format of `key=value`
+  * on success ioctl return value is 0
+* file info: get mergerfs metadata info for a file
+  * _IOWR(0xDF,3,char[4096]) = 0xD000DF03
+  * the key is passed in via the char buffer as a nul '\0' terminated string
+  * on success the ioctl return value is the total length
+  * keys:
+    * basepath: the base mount point for the file according to the getattr policy
+    * relpath: the relative path of the file from the mount point
+    * fullpath: the full path of the underlying file according to the getattr policy
+    * allpaths: a NUL '\0' delimited list of full paths to all files found
+
+
+#### .mergerfs pseudo file (deprecated) ####
+
+NOTE: this interface will be removed in mergerfs 3.0
 
 ```
 <mountpoint>/.mergerfs

libfuse/Makefile

@@ -1,9 +1,9 @@
 VERSION = 2.9.7-mergerfs_2.29.0
 
 ifeq ($(DEBUG),1)
-DEBUG_FLAGS := -O0 -g
+OPT_FLAGS := -O0 -g
 else
-DEBUG_FLAGS :=
+OPT_FLAGS := -O2
 endif
 
 DESTDIR       =
@@ -39,8 +39,7 @@ OBJS = $(SRC:lib/%.c=build/%.o)
 DEPS = $(SRC:lib/%.c=build/%.d)
 
 CFLAGS = \
-	-O2 \
-	$(DEBUG_FLAGS) \
+	$(OPT_FLAGS) \
 	-Wall \
 	-pipe \
 	-MMD

libfuse/include/fuse.h

@@ -77,7 +77,7 @@ struct fuse_operations {
 	 * ignored.	 The 'st_ino' field is ignored except if the 'use_ino'
 	 * mount option is given.
 	 */
-	int (*getattr) (const char *, struct stat *);
+        int (*getattr) (const char *, struct stat *, fuse_timeouts_t *);
 
 	/** Read the target of a symbolic link
 	 *
@@ -390,7 +390,7 @@ struct fuse_operations {
 	 *
 	 * Introduced in version 2.5
 	 */
-	int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *);
+        int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *, fuse_timeouts_t *);
 
 	/**
 	 * Perform POSIX file locking operation
@@ -504,7 +504,7 @@ struct fuse_operations {
 	 * Introduced in version 2.8
 	 */
 	int (*ioctl) (const char *fusepath,
-                      int cmd,
+                      unsigned long cmd,
                       void *arg,
 		      struct fuse_file_info *ffi,
                       unsigned int flags,
@@ -853,9 +853,17 @@ struct fuse_fs;
  * fuse_fs_releasedir and fuse_fs_statfs, which return 0.
  */
 
-int fuse_fs_getattr(struct fuse_fs *fs, const char *path, struct stat *buf);
-int fuse_fs_fgetattr(struct fuse_fs *fs, const char *path, struct stat *buf,
-		     struct fuse_file_info *fi);
+int fuse_fs_getattr(struct fuse_fs  *fs,
+                    const char      *path,
+                    struct stat     *buf,
+                    fuse_timeouts_t *timeout);
+
+int fuse_fs_fgetattr(struct fuse_fs        *fs,
+                     const char            *path,
+                     struct stat           *buf,
+		     struct fuse_file_info *fi,
+                     fuse_timeouts_t       *timeout);
+
 int fuse_fs_rename(struct fuse_fs *fs, const char *oldpath,
 		   const char *newpath);
 int fuse_fs_unlink(struct fuse_fs *fs, const char *path);
@@ -920,7 +928,7 @@ int fuse_fs_removexattr(struct fuse_fs *fs, const char *path,
 			const char *name);
 int fuse_fs_bmap(struct fuse_fs *fs, const char *path, size_t blocksize,
 		 uint64_t *idx);
-int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, int cmd, void *arg,
+int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, unsigned long cmd, void *arg,
 		  struct fuse_file_info *fi, unsigned int flags,
                   void *data, uint32_t *out_bufsz);
 int fuse_fs_poll(struct fuse_fs *fs, const char *path,

libfuse/include/fuse_common.h

@@ -40,6 +40,13 @@
 extern "C" {
 #endif
 
+typedef struct fuse_timeouts_s fuse_timeouts_t;
+struct fuse_timeouts_s
+{
+  uint64_t entry;
+  uint64_t attr;
+};
+
 /**
  * Information about open files
  *
@@ -83,9 +90,6 @@ fuse_file_info
 
   uint32_t auto_cache : 1;
 
-  /** Padding.  Do not use*/
-  uint32_t padding : 24;
-
   /** File handle.  May be filled in by filesystem in open().
       Available in all other file operations */
   uint64_t fh;

libfuse/include/fuse_lowlevel.h

@@ -101,11 +101,7 @@ struct fuse_entry_param {
 	 */
 	struct stat attr;
 
-	/** Validity timeout (in seconds) for the attributes */
-	double attr_timeout;
-
-	/** Validity timeout (in seconds) for the name */
-	double entry_timeout;
+        fuse_timeouts_t timeout;
 };
 
 /** Additional context associated with requests */
@@ -882,7 +878,7 @@ struct fuse_lowlevel_ops {
 	 * @param in_bufsz number of fetched bytes
 	 * @param out_bufsz maximum size of output data
 	 */
-	void (*ioctl) (fuse_req_t req, fuse_ino_t ino, int cmd, void *arg,
+	void (*ioctl) (fuse_req_t req, fuse_ino_t ino, unsigned long cmd, void *arg,
 		       struct fuse_file_info *fi, unsigned flags,
 		       const void *in_buf, uint32_t in_bufsz, uint32_t out_bufsz);
 
@@ -1136,8 +1132,9 @@ int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
  * @param attr_timeout	validity timeout (in seconds) for the attributes
  * @return zero for success, -errno for failure to send reply
  */
-int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
-		    double attr_timeout);
+int fuse_reply_attr(fuse_req_t         req,
+                    const struct stat *attr,
+                    const uint64_t     timeout);
 
 /**
  * Reply with the contents of a symbolic link

libfuse/lib/fuse.c

@@ -58,9 +58,6 @@ struct fuse_config {
 	unsigned int uid;
 	unsigned int gid;
 	unsigned int  umask;
-	double entry_timeout;
-	double negative_timeout;
-	double attr_timeout;
 	int remember;
 	int nopath;
 	int debug;
@@ -1392,8 +1389,7 @@ static int fuse_compat_open(struct fuse_fs *fs, const char *path,
 	else if (fs->compat == 22) {
 		struct fuse_file_info_compat tmp;
 		memcpy(&tmp, fi, sizeof(tmp));
-		err = ((struct fuse_operations_compat22 *) &fs->op)->open(path,
-									  &tmp);
+		err = ((struct fuse_operations_compat22 *) &fs->op)->open(path,&tmp);
 		memcpy(fi, &tmp, sizeof(tmp));
 		fi->fh = tmp.fh;
 	} else
@@ -1504,37 +1500,49 @@ static inline int fuse_compat_statfs(struct fuse_fs *fs, const char *path,
 
 #endif /* __FreeBSD__ || __NetBSD__ */
 
-int fuse_fs_getattr(struct fuse_fs *fs, const char *path, struct stat *buf)
+int
+fuse_fs_getattr(struct fuse_fs  *fs,
+                const char      *path,
+                struct stat     *buf,
+                fuse_timeouts_t *timeout)
 {
-	fuse_get_context()->private_data = fs->user_data;
-	if (fs->op.getattr) {
-		if (fs->debug)
-			fprintf(stderr, "getattr %s\n", path);
+  if(fs->op.getattr == NULL)
+    return -ENOSYS;
 
-		return fs->op.getattr(path, buf);
-	} else {
-		return -ENOSYS;
-	}
+  if(fs->debug)
+    fprintf(stderr,"getattr %s\n",path);
+
+  fuse_get_context()->private_data = fs->user_data;
+
+  return fs->op.getattr(path,buf,timeout);
 }
 
-int fuse_fs_fgetattr(struct fuse_fs *fs, const char *path, struct stat *buf,
-		     struct fuse_file_info *fi)
+int
+fuse_fs_fgetattr(struct fuse_fs        *fs,
+                 const char            *path,
+                 struct stat           *buf,
+                 struct fuse_file_info *fi,
+                 fuse_timeouts_t       *timeout)
 {
-	fuse_get_context()->private_data = fs->user_data;
-	if (fs->op.fgetattr) {
-		if (fs->debug)
-			fprintf(stderr, "fgetattr[%llu] %s\n",
-				(unsigned long long) fi->fh, path);
+  fuse_get_context()->private_data = fs->user_data;
+  if(fs->op.fgetattr)
+    {
+      if(fs->debug)
+        fprintf(stderr,"fgetattr[%llu] %s\n",(unsigned long long)fi->fh,path);
 
-		return fs->op.fgetattr(path, buf, fi);
-	} else if (path && fs->op.getattr) {
-		if (fs->debug)
-			fprintf(stderr, "getattr %s\n", path);
+      return fs->op.fgetattr(path,buf,fi,timeout);
+    }
+  else if(path && fs->op.getattr)
+    {
+      if(fs->debug)
+        fprintf(stderr,"getattr %s\n",path);
 
-		return fs->op.getattr(path, buf);
-	} else {
-		return -ENOSYS;
-	}
+      return fs->op.getattr(path,buf,timeout);
+    }
+  else
+    {
+      return -ENOSYS;
+    }
 }
 
 int
@@ -2254,14 +2262,14 @@ int fuse_fs_removexattr(struct fuse_fs *fs, const char *path, const char *name)
 	}
 }
 
-int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, int cmd, void *arg,
+int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, unsigned long cmd, void *arg,
 		  struct fuse_file_info *fi, unsigned int flags,
                   void *data, uint32_t *out_size)
 {
 	fuse_get_context()->private_data = fs->user_data;
 	if (fs->op.ioctl) {
 		if (fs->debug)
-			fprintf(stderr, "ioctl[%llu] 0x%x flags: 0x%x\n",
+			fprintf(stderr, "ioctl[%llu] 0x%lx flags: 0x%x\n",
 				(unsigned long long) fi->fh, cmd, flags);
 
 		return fs->op.ioctl(path, cmd, arg, fi, flags, data, out_size);
@@ -2377,41 +2385,53 @@ update_stat(struct node       *node_,
   *stold = *stnew_;
 }
 
-static int lookup_path(struct fuse *f, fuse_ino_t nodeid,
-		       const char *name, const char *path,
-		       struct fuse_entry_param *e, struct fuse_file_info *fi)
+static
+int
+lookup_path(struct fuse             *f,
+            fuse_ino_t               nodeid,
+            const char              *name,
+            const char              *path,
+            struct fuse_entry_param *e,
+            struct fuse_file_info   *fi)
 {
-	int res;
+  int res;
 
-	memset(e, 0, sizeof(struct fuse_entry_param));
-	if (fi)
-		res = fuse_fs_fgetattr(f->fs, path, &e->attr, fi);
-	else
-		res = fuse_fs_getattr(f->fs, path, &e->attr);
-	if (res == 0) {
-		struct node *node;
+  memset(e,0,sizeof(struct fuse_entry_param));
 
-		node = find_node(f, nodeid, name);
-		if (node == NULL)
-			res = -ENOMEM;
-		else {
-			e->ino = node->nodeid;
-			e->generation = node->generation;
-			e->entry_timeout = f->conf.entry_timeout;
-			e->attr_timeout = f->conf.attr_timeout;
-                        pthread_mutex_lock(&f->lock);
-                        update_stat(node, &e->attr);
-                        pthread_mutex_unlock(&f->lock);
-			set_stat(f, e->ino, &e->attr);
-			if(f->conf.debug)
-                          fprintf(stderr,
-                                  "   NODEID: %llu\n"
-                                  "   GEN: %llu\n",
-                                  (unsigned long long)e->ino,
-                                  (unsigned long long)e->generation);
-		}
-	}
-	return res;
+  if(fi)
+    res = fuse_fs_fgetattr(f->fs,path,&e->attr,fi,&e->timeout);
+  else
+    res = fuse_fs_getattr(f->fs,path,&e->attr,&e->timeout);
+
+  if(res == 0)
+    {
+      struct node *node;
+
+      node = find_node(f,nodeid,name);
+      if(node == NULL)
+        {
+          res = -ENOMEM;
+        }
+      else
+        {
+          e->ino        = node->nodeid;
+          e->generation = node->generation;
+
+          pthread_mutex_lock(&f->lock);
+          update_stat(node,&e->attr);
+          pthread_mutex_unlock(&f->lock);
+
+          set_stat(f,e->ino,&e->attr);
+          if(f->conf.debug)
+            fprintf(stderr,
+                    "   NODEID: %llu\n"
+                    "   GEN: %llu\n",
+                    (unsigned long long)e->ino,
+                    (unsigned long long)e->generation);
+        }
+    }
+
+  return res;
 }
 
 static struct fuse_context_i *fuse_get_context_internal(void)
@@ -2545,61 +2565,63 @@ static void fuse_lib_destroy(void *data)
 	f->fs = NULL;
 }
 
-static void fuse_lib_lookup(fuse_req_t req, fuse_ino_t parent,
-			    const char *name)
+static
+void
+fuse_lib_lookup(fuse_req_t req,
+                fuse_ino_t parent,
+                const char *name)
 {
-	struct fuse *f = req_fuse_prepare(req);
-	struct fuse_entry_param e;
-	char *path;
-	int err;
-	struct node *dot = NULL;
-
-	if (name[0] == '.') {
-		int len = strlen(name);
-
-		if (len == 1 || (name[1] == '.' && len == 2)) {
-			pthread_mutex_lock(&f->lock);
-			if (len == 1) {
-				if (f->conf.debug)
-					fprintf(stderr, "LOOKUP-DOT\n");
-				dot = get_node_nocheck(f, parent);
-				if (dot == NULL) {
-					pthread_mutex_unlock(&f->lock);
-					reply_entry(req, &e, -ESTALE);
-					return;
-				}
-				dot->refctr++;
-			} else {
-				if (f->conf.debug)
-					fprintf(stderr, "LOOKUP-DOTDOT\n");
-				parent = get_node(f, parent)->parent->nodeid;
-			}
-			pthread_mutex_unlock(&f->lock);
-			name = NULL;
-		}
-	}
+  struct fuse *f = req_fuse_prepare(req);
+  struct fuse_entry_param e;
+  char *path;
+  int err;
+  struct node *dot = NULL;
 
-	err = get_path_name(f, parent, name, &path);
-	if (!err) {
-		struct fuse_intr_data d;
-		if (f->conf.debug)
-			fprintf(stderr, "LOOKUP %s\n", path);
-		fuse_prepare_interrupt(f, req, &d);
-		err = lookup_path(f, parent, name, path, &e, NULL);
-		if (err == -ENOENT && f->conf.negative_timeout != 0.0) {
-			e.ino = 0;
-			e.entry_timeout = f->conf.negative_timeout;
-			err = 0;
-		}
-		fuse_finish_interrupt(f, req, &d);
-		free_path(f, parent, path);
-	}
-	if (dot) {
-		pthread_mutex_lock(&f->lock);
-		unref_node(f, dot);
-		pthread_mutex_unlock(&f->lock);
-	}
-	reply_entry(req, &e, err);
+  if (name[0] == '.') {
+    int len = strlen(name);
+
+    if (len == 1 || (name[1] == '.' && len == 2)) {
+      pthread_mutex_lock(&f->lock);
+      if (len == 1) {
+        if (f->conf.debug)
+          fprintf(stderr, "LOOKUP-DOT\n");
+        dot = get_node_nocheck(f, parent);
+        if (dot == NULL) {
+          pthread_mutex_unlock(&f->lock);
+          reply_entry(req, &e, -ESTALE);
+          return;
+        }
+        dot->refctr++;
+      } else {
+        if (f->conf.debug)
+          fprintf(stderr, "LOOKUP-DOTDOT\n");
+        parent = get_node(f, parent)->parent->nodeid;
+      }
+      pthread_mutex_unlock(&f->lock);
+      name = NULL;
+    }
+  }
+
+  err = get_path_name(f, parent, name, &path);
+  if (!err) {
+    struct fuse_intr_data d;
+    if (f->conf.debug)
+      fprintf(stderr, "LOOKUP %s\n", path);
+    fuse_prepare_interrupt(f, req, &d);
+    err = lookup_path(f, parent, name, path, &e, NULL);
+    if (err == -ENOENT) {
+      e.ino = 0;
+      err = 0;
+    }
+    fuse_finish_interrupt(f, req, &d);
+    free_path(f, parent, path);
+  }
+  if (dot) {
+    pthread_mutex_lock(&f->lock);
+    unref_node(f, dot);
+    pthread_mutex_unlock(&f->lock);
+  }
+  reply_entry(req, &e, err);
 }
 
 static
@@ -2639,56 +2661,69 @@ static void fuse_lib_forget_multi(fuse_req_t req, size_t count,
 }
 
 
-static void fuse_lib_getattr(fuse_req_t req, fuse_ino_t ino,
-			     struct fuse_file_info *fi)
+static
+void
+fuse_lib_getattr(fuse_req_t req,
+                 fuse_ino_t ino,
+                 struct fuse_file_info *fi)
 {
-	struct fuse *f = req_fuse_prepare(req);
-	struct stat buf;
-	char *path;
-	int err;
-        struct node *node;
-        struct fuse_file_info ffi = {0};
 
-        if(fi == NULL)
-          {
-            pthread_mutex_lock(&f->lock);
-            node = get_node(f,ino);
-            if(node->is_hidden)
-              {
-                fi = &ffi;
-                fi->fh = node->hidden_fh;
-              }
-            pthread_mutex_unlock(&f->lock);
-          }
+  int err;
+  char *path;
+  struct fuse *f;
+  struct stat buf;
+  struct node *node;
+  fuse_timeouts_t timeout;
+  struct fuse_file_info ffi = {0};
 
-	memset(&buf, 0, sizeof(buf));
+  f = req_fuse_prepare(req);
+  if(fi == NULL)
+    {
+      pthread_mutex_lock(&f->lock);
+      node = get_node(f,ino);
+      if(node->is_hidden)
+        {
+          fi = &ffi;
+          fi->fh = node->hidden_fh;
+        }
+      pthread_mutex_unlock(&f->lock);
+    }
 
-        path = NULL;
-        err = (((fi == NULL) || (f->fs->op.fgetattr == NULL)) ?
-               get_path(f,ino,&path) :
-               get_path_nullok(f,ino,&path));
+  memset(&buf, 0, sizeof(buf));
 
-	if (!err) {
-		struct fuse_intr_data d;
-		fuse_prepare_interrupt(f, req, &d);
+  path = NULL;
+  err = (((fi == NULL) || (f->fs->op.fgetattr == NULL)) ?
+         get_path(f,ino,&path) :
+         get_path_nullok(f,ino,&path));
 
-                err = ((fi == NULL) ?
-                       fuse_fs_getattr(f->fs,path,&buf) :
-                       fuse_fs_fgetattr(f->fs,path,&buf,fi));
+  if(!err)
+    {
+      struct fuse_intr_data d;
 
-		fuse_finish_interrupt(f, req, &d);
-		free_path(f, ino, path);
-	}
+      fuse_prepare_interrupt(f,req,&d);
 
-	if (!err) {
-		pthread_mutex_lock(&f->lock);
-                node = get_node(f, ino);
-                update_stat(node, &buf);
-		pthread_mutex_unlock(&f->lock);
-		set_stat(f, ino, &buf);
-		fuse_reply_attr(req, &buf, f->conf.attr_timeout);
-	} else
-		reply_err(req, err);
+      err = ((fi == NULL) ?
+             fuse_fs_getattr(f->fs,path,&buf,&timeout) :
+             fuse_fs_fgetattr(f->fs,path,&buf,fi,&timeout));
+
+      fuse_finish_interrupt(f,req,&d);
+
+      free_path(f,ino,path);
+    }
+
+  if(!err)
+    {
+      pthread_mutex_lock(&f->lock);
+      node = get_node(f,ino);
+      update_stat(node,&buf);
+      pthread_mutex_unlock(&f->lock);
+      set_stat(f,ino,&buf);
+      fuse_reply_attr(req,&buf,timeout.attr);
+    }
+  else
+    {
+      reply_err(req, err);
+    }
 }
 
 int fuse_fs_chmod(struct fuse_fs *fs, const char *path, mode_t mode)
@@ -2715,10 +2750,10 @@ fuse_fs_fchmod(struct fuse_fs              *fs_,
 
 static
 void
-fuse_lib_setattr(fuse_req_t             req,
-                 fuse_ino_t             ino,
-                 struct stat           *attr,
-                 int                    valid,
+fuse_lib_setattr(fuse_req_t req,
+                 fuse_ino_t ino,
+                 struct stat *attr,
+                 int valid,
                  struct fuse_file_info *fi)
 {
   struct fuse *f = req_fuse_prepare(req);
@@ -2726,6 +2761,7 @@ fuse_lib_setattr(fuse_req_t             req,
   char *path;
   int err;
   struct node *node;
+  fuse_timeouts_t timeout;
   struct fuse_file_info ffi = {0};
 
   if(fi == NULL)
@@ -2812,22 +2848,23 @@ fuse_lib_setattr(fuse_req_t             req,
                    fuse_fs_futimens(f->fs,fi,tv));
           }
 
-      if(!err)
+      if (!err)
         err = ((fi == NULL) ?
-               fuse_fs_getattr(f->fs,path,&buf) :
-               fuse_fs_fgetattr(f->fs,path,&buf,fi));
+               fuse_fs_getattr(f->fs,path,&buf,&timeout) :
+               fuse_fs_fgetattr(f->fs,path,&buf,fi,&timeout));
 
       fuse_finish_interrupt(f,req,&d);
       free_path(f,ino,path);
     }
 
+
   if(!err)
     {
       pthread_mutex_lock(&f->lock);
       update_stat(get_node(f,ino),&buf);
       pthread_mutex_unlock(&f->lock);
       set_stat(f,ino,&buf);
-      fuse_reply_attr(req,&buf,f->conf.attr_timeout);
+      fuse_reply_attr(req,&buf,timeout.attr);
     }
   else
     {
@@ -3191,6 +3228,7 @@ open_auto_cache(struct fuse           *f,
                 struct fuse_file_info *fi)
 {
   struct node *node;
+  fuse_timeouts_t timeout;
 
   pthread_mutex_lock(&f->lock);
 
@@ -3201,7 +3239,7 @@ open_auto_cache(struct fuse           *f,
       struct stat stbuf;
 
       pthread_mutex_unlock(&f->lock);
-      err = fuse_fs_fgetattr(f->fs,path,&stbuf,fi);
+      err = fuse_fs_fgetattr(f->fs,path,&stbuf,fi,&timeout);
       pthread_mutex_lock(&f->lock);
 
       if(!err)
@@ -4078,7 +4116,7 @@ static void fuse_lib_bmap(fuse_req_t req, fuse_ino_t ino, size_t blocksize,
 		reply_err(req, err);
 }
 
-static void fuse_lib_ioctl(fuse_req_t req, fuse_ino_t ino, int cmd, void *arg,
+static void fuse_lib_ioctl(fuse_req_t req, fuse_ino_t ino, unsigned long cmd, void *arg,
 			   struct fuse_file_info *llfi, unsigned int flags,
 			   const void *in_buf, uint32_t in_bufsz,
 			   uint32_t out_bufsz_)
@@ -4228,7 +4266,7 @@ int fuse_clean_cache(struct fuse *f)
 static struct fuse_lowlevel_ops fuse_path_ops = {
 	.init            = fuse_lib_init,
 	.destroy         = fuse_lib_destroy,
-	.lookup          = fuse_lib_lookup,
+        .lookup          = fuse_lib_lookup,
 	.forget          = fuse_lib_forget,
 	.forget_multi    = fuse_lib_forget_multi,
 	.getattr         = fuse_lib_getattr,
@@ -4469,9 +4507,6 @@ static const struct fuse_opt fuse_lib_opts[] = {
 	FUSE_LIB_OPT("uid=%d",		      uid, 0),
 	FUSE_LIB_OPT("gid=",		      set_gid, 1),
 	FUSE_LIB_OPT("gid=%d",		      gid, 0),
-	FUSE_LIB_OPT("entry_timeout=%lf",     entry_timeout, 0),
-	FUSE_LIB_OPT("attr_timeout=%lf",      attr_timeout, 0),
-	FUSE_LIB_OPT("negative_timeout=%lf",  negative_timeout, 0),
 	FUSE_LIB_OPT("noforget",              remember, -1),
 	FUSE_LIB_OPT("remember=%u",           remember, 0),
 	FUSE_LIB_OPT("nopath",                nopath, 1),
@@ -4488,9 +4523,6 @@ static void fuse_lib_help(void)
 "    -o umask=M             set file permissions (octal)\n"
 "    -o uid=N               set file owner\n"
 "    -o gid=N               set file group\n"
-"    -o entry_timeout=T     cache timeout for names (1.0s)\n"
-"    -o negative_timeout=T  cache timeout for deleted names (0.0s)\n"
-"    -o attr_timeout=T      cache timeout for attributes (1.0s)\n"
 "    -o noforget            never forget cached inodes\n"
 "    -o remember=T          remember cached inodes for T seconds (0s)\n"
 "    -o nopath              don't supply path if not necessary\n"
@@ -4657,9 +4689,6 @@ struct fuse *fuse_new_common(struct fuse_chan *ch, struct fuse_args *args,
 		llop.setlk = NULL;
 	}
 
-	f->conf.entry_timeout = 1.0;
-	f->conf.attr_timeout = 1.0;
-	f->conf.negative_timeout = 0.0;
 	f->conf.intr_signal = FUSE_DEFAULT_INTR_SIGNAL;
 
 	f->pagesize = getpagesize();
@@ -4889,42 +4918,3 @@ fuse_config_num_threads(const struct fuse *fuse_)
 {
   return fuse_->conf.threads;
 }
-
-void
-fuse_config_set_entry_timeout(struct fuse  *fuse_,
-                              const double  entry_timeout_)
-{
-  fuse_->conf.entry_timeout = entry_timeout_;
-}
-
-double
-fuse_config_get_entry_timeout(const struct fuse *fuse_)
-{
-  return fuse_->conf.entry_timeout;
-}
-
-void
-fuse_config_set_negative_entry_timeout(struct fuse *fuse_,
-                                       const double entry_timeout_)
-{
-  fuse_->conf.negative_timeout = entry_timeout_;
-}
-
-double
-fuse_config_get_negative_entry_timeout(const struct fuse *fuse_)
-{
-  return fuse_->conf.negative_timeout;
-}
-
-void
-fuse_config_set_attr_timeout(struct fuse  *fuse_,
-                             const double  attr_timeout_)
-{
-  fuse_->conf.attr_timeout = attr_timeout_;
-}
-
-double
-fuse_config_get_attr_timeout(const struct fuse *fuse_)
-{
-  return fuse_->conf.attr_timeout;
-}

libfuse/lib/fuse_lowlevel.c

@@ -319,37 +319,18 @@ void fuse_reply_none(fuse_req_t req)
 	fuse_free_req(req);
 }
 
-static unsigned long calc_timeout_sec(double t)
-{
-	if (t > (double) ULONG_MAX)
-		return ULONG_MAX;
-	else if (t < 0.0)
-		return 0;
-	else
-		return (unsigned long) t;
-}
-
-static unsigned int calc_timeout_nsec(double t)
-{
-	double f = t - (double) calc_timeout_sec(t);
-	if (f < 0.0)
-		return 0;
-	else if (f >= 0.999999999)
-		return 999999999;
-	else
-		return (unsigned int) (f * 1.0e9);
-}
-
-static void fill_entry(struct fuse_entry_out *arg,
-		       const struct fuse_entry_param *e)
+static
+void
+fill_entry(struct fuse_entry_out         *arg,
+           const struct fuse_entry_param *e)
 {
-	arg->nodeid = e->ino;
-	arg->generation = e->generation;
-	arg->entry_valid = calc_timeout_sec(e->entry_timeout);
-	arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout);
-	arg->attr_valid = calc_timeout_sec(e->attr_timeout);
-	arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout);
-	convert_stat(&e->attr, &arg->attr);
+  arg->nodeid           = e->ino;
+  arg->generation       = e->generation;
+  arg->entry_valid      = e->timeout.entry;
+  arg->entry_valid_nsec = 0;
+  arg->attr_valid       = e->timeout.attr;
+  arg->attr_valid_nsec  = 0;
+  convert_stat(&e->attr,&arg->attr);
 }
 
 static void fill_open(struct fuse_open_out *arg,
@@ -398,19 +379,21 @@ int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
 			     entrysize + sizeof(struct fuse_open_out));
 }
 
-int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
-		    double attr_timeout)
+int
+fuse_reply_attr(fuse_req_t         req,
+                const struct stat *attr,
+                const uint64_t     timeout)
 {
-	struct fuse_attr_out arg;
-	size_t size = req->f->conn.proto_minor < 9 ?
-		FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
+  struct fuse_attr_out arg;
+  size_t size = req->f->conn.proto_minor < 9 ?
+    FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
 
-	memset(&arg, 0, sizeof(arg));
-	arg.attr_valid = calc_timeout_sec(attr_timeout);
-	arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
-	convert_stat(attr, &arg.attr);
+  memset(&arg,0,sizeof(arg));
+  arg.attr_valid      = timeout;
+  arg.attr_valid_nsec = 0;
+  convert_stat(attr,&arg.attr);
 
-	return send_reply_ok(req, &arg, size);
+  return send_reply_ok(req,&arg,size);
 }
 
 int fuse_reply_readlink(fuse_req_t req, const char *linkname)
@@ -1712,9 +1695,9 @@ static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 	}
 
 	if (req->f->op.ioctl)
-		req->f->op.ioctl(req, nodeid, arg->cmd,
-				 (void *)(uintptr_t)arg->arg, &fi, flags,
-				 in_buf, arg->in_size, arg->out_size);
+                req->f->op.ioctl(req, nodeid, (unsigned long)arg->cmd,
+                                 (void *)(uintptr_t)arg->arg, &fi, flags,
+                                 in_buf, arg->in_size, arg->out_size);
 	else
 		fuse_reply_err(req, ENOSYS);
 }

man/mergerfs.1

@@ -116,6 +116,11 @@ for comparisons / ideas.
 .SH OPTIONS
 .SS mount options
 .IP \[bu] 2
+\f[B]config\f[]: Path to a config file.
+Same arguments as below in key=val format.
+.IP \[bu] 2
+\f[B]branches\f[]: Colon delimited list of branches.
+.IP \[bu] 2
 \f[B]allow_other\f[]: A libfuse option which allows users besides the
 one which ran mergerfs to see the filesystem.
 This is required for most use\-cases.
@@ -940,7 +945,69 @@ make\ LTO=1\ \ \ \ \ \ \ \ \ \ \ \ \-\ build\ with\ link\ time\ optimization
 \f[]
 .fi
 .SH RUNTIME CONFIG
-.SS .mergerfs pseudo file
+.SS ioctl
+.PP
+The original runtime config API was via xattr calls.
+This however became an issue when needing to disable xattr.
+While slightly less convenient ioctl does not have the same problems and
+will be the main API going forward.
+.PP
+The keys are the same as the command line option arguments as well as
+the config file.
+.SS requests / commands
+.PP
+All commands take a 4096 byte char buffer.
+.IP \[bu] 2
+read keys: get a nul \[aq]\[aq] delimited list of option keys
+.IP \[bu] 2
+_IOWR(0xDF,0,char[4096]) = 0xD000DF00
+.IP \[bu] 2
+on success ioctl return value is the total length
+.IP \[bu] 2
+read value: get an option value
+.IP \[bu] 2
+_IOWR(0xDF,1,char[4096]) = 0xD000DF01
+.IP \[bu] 2
+the key is passed in via the char buffer as a nul \[aq]\[aq] terminated
+string
+.IP \[bu] 2
+on success ioctl return value is the total length
+.IP \[bu] 2
+write value: set an option value
+.IP \[bu] 2
+_IOW(0xDF,2,char[4096]) = 0x5000DF02
+.IP \[bu] 2
+the key and value is passed in via the char buffer as a nul \[aq]\[aq]
+terminated string in the format of \f[C]key=value\f[]
+.IP \[bu] 2
+on success ioctl return value is 0
+.IP \[bu] 2
+file info: get mergerfs metadata info for a file
+.IP \[bu] 2
+_IOWR(0xDF,3,char[4096]) = 0xD000DF03
+.IP \[bu] 2
+the key is passed in via the char buffer as a nul \[aq]\[aq] terminated
+string
+.IP \[bu] 2
+on success the ioctl return value is the total length
+.IP \[bu] 2
+keys:
+.RS 2
+.IP \[bu] 2
+basepath: the base mount point for the file according to the getattr
+policy
+.IP \[bu] 2
+relpath: the relative path of the file from the mount point
+.IP \[bu] 2
+fullpath: the full path of the underlying file according to the getattr
+policy
+.IP \[bu] 2
+allpaths: a NUL \[aq]\[aq] delimited list of full paths to all files
+found
+.RE
+.SS .mergerfs pseudo file (deprecated)
+.PP
+NOTE: this interface will be removed in mergerfs 3.0
 .IP
 .nf
 \f[C]

src/branch.cpp

@@ -17,14 +17,16 @@
 */
 
 #include "branch.hpp"
+#include "ef.hpp"
 #include "fs.hpp"
 #include "fs_glob.hpp"
 #include "str.hpp"
 
-#include <fnmatch.h>
-
 #include <string>
 
+#include <errno.h>
+#include <fnmatch.h>
+
 using std::string;
 using std::vector;
 
@@ -47,53 +49,23 @@ Branch::ro_or_nc(void) const
           (mode == Branch::NC));
 }
 
-string
-Branches::to_string(const bool mode_) const
+static
+void
+split(const std::string &s_,
+      std::string       *instr_,
+      std::string       *values_)
 {
-  string tmp;
-
-  for(size_t i = 0; i < size(); i++)
-    {
-      const Branch &branch = (*this)[i];
-
-      tmp += branch.path;
-
-      if(mode_)
-        {
-          tmp += '=';
-          switch(branch.mode)
-            {
-            default:
-            case Branch::RW:
-              tmp += "RW";
-              break;
-            case Branch::RO:
-              tmp += "RO";
-              break;
-            case Branch::NC:
-              tmp += "NC";
-              break;
-            }
-        }
-
-      tmp += ':';
-    }
-
-  if(*tmp.rbegin() == ':')
-    tmp.erase(tmp.size() - 1);
+  uint64_t offset;
 
-  return tmp;
+  offset = s_.find_first_of('/');
+  *instr_ = s_.substr(0,offset);
+  if(offset != std::string::npos)
+    *values_ = s_.substr(offset);
 }
 
-void
-Branches::to_paths(vector<string> &vec_) const
+Branches::Branches()
 {
-  for(size_t i = 0; i < size(); i++)
-    {
-      const Branch &branch = (*this)[i];
-
-      vec_.push_back(branch.path);
-    }
+  pthread_rwlock_init(&lock,NULL);
 }
 
 static
@@ -107,11 +79,11 @@ parse(const string &str_,
 
   str = str_;
   branch.mode = Branch::INVALID;
-  if(str::ends_with(str,"=RO"))
+  if(str::endswith(str,"=RO"))
     branch.mode = Branch::RO;
-  else if(str::ends_with(str,"=RW"))
+  ef(str::endswith(str,"=RW"))
     branch.mode = Branch::RW;
-  else if(str::ends_with(str,"=NC"))
+  ef(str::endswith(str,"=NC"))
     branch.mode = Branch::NC;
 
   if(branch.mode != Branch::INVALID)
@@ -128,29 +100,33 @@ parse(const string &str_,
     }
 }
 
+static
 void
-Branches::set(const std::string &str_)
+set(Branches          &branches_,
+    const std::string &str_)
 {
   vector<string> paths;
 
-  clear();
+  branches_.clear();
 
   str::split(paths,str_,':');
 
   for(size_t i = 0; i < paths.size(); i++)
     {
-      Branches branches;
+      Branches tmp;
 
-      parse(paths[i],branches);
+      parse(paths[i],tmp);
 
-      insert(end(),
-             branches.begin(),
-             branches.end());
+      branches_.insert(branches_.end(),
+                       tmp.begin(),
+                       tmp.end());
     }
 }
 
+static
 void
-Branches::add_begin(const std::string &str_)
+add_begin(Branches          &branches_,
+          const std::string &str_)
 {
   vector<string> paths;
 
@@ -158,18 +134,20 @@ Branches::add_begin(const std::string &str_)
 
   for(size_t i = 0; i < paths.size(); i++)
     {
-      Branches branches;
+      Branches tmp;
 
-      parse(paths[i],branches);
+      parse(paths[i],tmp);
 
-      insert(begin(),
-             branches.begin(),
-             branches.end());
+      branches_.insert(branches_.begin(),
+                       tmp.begin(),
+                       tmp.end());
     }
 }
 
+static
 void
-Branches::add_end(const std::string &str_)
+add_end(Branches          &branches_,
+        const std::string &str_)
 {
   vector<string> paths;
 
@@ -177,36 +155,41 @@ Branches::add_end(const std::string &str_)
 
   for(size_t i = 0; i < paths.size(); i++)
     {
-      Branches branches;
+      Branches tmp;
 
-      parse(paths[i],branches);
+      parse(paths[i],tmp);
 
-      insert(end(),
-             branches.begin(),
-             branches.end());
+      branches_.insert(branches_.end(),
+                       tmp.begin(),
+                       tmp.end());
     }
 }
 
+static
 void
-Branches::erase_begin(void)
+erase_begin(Branches &branches_)
 {
-  erase(begin());
+  branches_.erase(branches_.begin());
 }
 
+static
 void
-Branches::erase_end(void)
+erase_end(Branches &branches_)
 {
-  pop_back();
+  branches_.pop_back();
 }
 
+static
 void
-Branches::erase_fnmatch(const std::string &str_)
+erase_fnmatch(Branches          &branches_,
+              const std::string &str_)
 {
   vector<string> patterns;
 
   str::split(patterns,str_,':');
 
-  for(iterator i = begin(); i != end();)
+  for(Branches::iterator i = branches_.begin();
+      i != branches_.end();)
     {
       int match = FNM_NOMATCH;
 
@@ -217,6 +200,116 @@ Branches::erase_fnmatch(const std::string &str_)
           match = ::fnmatch(pi->c_str(),i->path.c_str(),0);
         }
 
-      i = ((match == 0) ? erase(i) : (i+1));
+      i = ((match == 0) ? branches_.erase(i) : (i+1));
+    }
+}
+
+int
+Branches::from_string(const std::string &s_)
+{
+  rwlock::WriteGuard guard(&lock);
+  std::string instr;
+  std::string values;
+
+  ::split(s_,&instr,&values);
+
+  if(instr == "+")
+    ::add_end(*this,values);
+  ef(instr == "+<")
+    ::add_begin(*this,values);
+  ef(instr == "+>")
+    ::add_end(*this,values);
+  ef(instr == "-")
+    ::erase_fnmatch(*this,values);
+  ef(instr == "-<")
+    ::erase_begin(*this);
+  ef(instr == "->")
+    ::erase_end(*this);
+  ef(instr == "=")
+    ::set(*this,values);
+  ef(instr.empty())
+    ::set(*this,values);
+  else
+    return -EINVAL;
+
+  return 0;
+}
+
+string
+Branches::to_string(void) const
+{
+  rwlock::ReadGuard guard(&lock);
+  string tmp;
+
+  for(size_t i = 0; i < size(); i++)
+    {
+      const Branch &branch = (*this)[i];
+
+      tmp += branch.path;
+
+      tmp += '=';
+      switch(branch.mode)
+        {
+        default:
+        case Branch::RW:
+          tmp += "RW";
+          break;
+        case Branch::RO:
+          tmp += "RO";
+          break;
+        case Branch::NC:
+          tmp += "NC";
+          break;
+        }
+
+      tmp += ':';
+    }
+
+  if(*tmp.rbegin() == ':')
+    tmp.erase(tmp.size() - 1);
+
+  return tmp;
+}
+
+void
+Branches::to_paths(vector<string> &vec_) const
+{
+  rwlock::ReadGuard guard(&lock);
+
+  for(size_t i = 0; i < size(); i++)
+    {
+      const Branch &branch = (*this)[i];
+
+      vec_.push_back(branch.path);
     }
 }
+
+SrcMounts::SrcMounts(Branches &b_)
+  : _branches(b_)
+{
+
+}
+
+int
+SrcMounts::from_string(const std::string &s_)
+{
+  return _branches.from_string(s_);
+}
+
+std::string
+SrcMounts::to_string(void) const
+{
+  rwlock::ReadGuard guard(&_branches.lock);
+  std::string rv;
+
+  for(uint64_t i = 0; i < _branches.size(); i++)
+    {
+      rv += _branches[i].path;
+      rv += ':';
+    }
+
+  if(*rv.rbegin() == ':')
+    rv.erase(rv.size() - 1);
+
+  return rv;
+}

src/branch.hpp

@@ -18,11 +18,17 @@
 
 #pragma once
 
+#include "rwlock.hpp"
+#include "tofrom_string.hpp"
+
 #include <string>
 #include <vector>
 
-struct Branch
+#include <pthread.h>
+
+class Branch
 {
+public:
   enum Mode
     {
       INVALID,
@@ -39,18 +45,31 @@ struct Branch
   bool ro_or_nc(void) const;
 };
 
-class Branches : public std::vector<Branch>
+class Branches : public std::vector<Branch>, public ToFromString
 {
 public:
-  std::string to_string(const bool mode_ = false) const;
+  Branches();
 
-  void to_paths(std::vector<std::string> &vec_) const;
+public:
+  int from_string(const std::string &str);
+  std::string to_string(void) const;
 
 public:
-  void set(const std::string &str_);
-  void add_begin(const std::string &str_);
-  void add_end(const std::string &str_);
-  void erase_begin(void);
-  void erase_end(void);
-  void erase_fnmatch(const std::string &str_);
+  void to_paths(std::vector<std::string> &vec) const;
+
+public:
+  mutable pthread_rwlock_t lock;
+};
+
+class SrcMounts : public ToFromString
+{
+public:
+  SrcMounts(Branches &b_);
+
+public:
+  int from_string(const std::string &str);
+  std::string to_string(void) const;
+
+private:
+  Branches &_branches;
 };

src/config.cpp

@@ -15,187 +15,393 @@
 */
 
 #include "config.hpp"
+#include "ef.hpp"
 #include "errno.hpp"
+#include "from_string.hpp"
 #include "fs.hpp"
+#include "num.hpp"
 #include "rwlock.hpp"
+#include "to_string.hpp"
+#include "version.hpp"
 
+#include <algorithm>
 #include <string>
-#include <vector>
+#include <iostream>
 
-#include <unistd.h>
+#include <stdint.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #define MINFREESPACE_DEFAULT (4294967295ULL)
-#define POLICYINIT(X) X(policies[FuseFunc::Enum::X])
 
 using std::string;
-using std::vector;
+
+#define IFERT(S) if(S == s_) return true
+
+namespace l
+{
+  static
+  bool
+  readonly(const std::string &s_)
+  {
+    IFERT("async_read");
+    IFERT("cache.symlinks");
+    IFERT("cache.writeback");
+    IFERT("fsname");
+    IFERT("fuse_msg_size");
+    IFERT("mount");
+    IFERT("nullrw");
+    IFERT("pid");
+    IFERT("readdirplus");
+    IFERT("threads");
+    IFERT("version");
+
+    return false;
+  }
+}
 
 Config::Config()
-  : destmount(),
-    branches(),
-    branches_lock(),
-    minfreespace(MINFREESPACE_DEFAULT),
-    moveonenospc(false),
-    direct_io(false),
-    dropcacheonclose(false),
-    symlinkify(false),
-    symlinkify_timeout(3600),
-    nullrw(false),
-    ignorepponrename(false),
-    security_capability(true),
-    link_cow(false),
-    xattr(0),
-    statfs(StatFS::BASE),
-    statfs_ignore(StatFSIgnore::NONE),
-    posix_acl(false),
-    cache_symlinks(false),
-    cache_readdir(false),
-    async_read(true),
-    writeback_cache(false),
-    readdirplus(false),
-    cache_files(CacheFiles::LIBFUSE),
-    fuse_msg_size(FUSE_MAX_MAX_PAGES),
-    POLICYINIT(access),
-    POLICYINIT(chmod),
-    POLICYINIT(chown),
-    POLICYINIT(create),
-    POLICYINIT(getattr),
-    POLICYINIT(getxattr),
-    POLICYINIT(link),
-    POLICYINIT(listxattr),
-    POLICYINIT(mkdir),
-    POLICYINIT(mknod),
-    POLICYINIT(open),
-    POLICYINIT(readlink),
-    POLICYINIT(removexattr),
-    POLICYINIT(rename),
-    POLICYINIT(rmdir),
-    POLICYINIT(setxattr),
-    POLICYINIT(symlink),
-    POLICYINIT(truncate),
-    POLICYINIT(unlink),
-    POLICYINIT(utimens),
-    controlfile("/.mergerfs")
-{
-  pthread_rwlock_init(&branches_lock,NULL);
-
-  set_category_policy("action","epall");
-  set_category_policy("create","epmfs");
-  set_category_policy("search","ff");
+  :
+  open_cache(),
+
+  controlfile("/.mergerfs"),
+
+  async_read(true),
+  auto_cache(false),
+  branches(),
+  cache_attr(1),
+  cache_entry(1),
+  cache_files(CacheFiles::ENUM::LIBFUSE),
+  cache_negative_entry(0),
+  cache_readdir(false),
+  cache_statfs(0),
+  cache_symlinks(false),
+  category(func),
+  direct_io(false),
+  dropcacheonclose(false),
+  fsname(),
+  func(),
+  fuse_msg_size(FUSE_MAX_MAX_PAGES),
+  ignorepponrename(false),
+  link_cow(false),
+  minfreespace(MINFREESPACE_DEFAULT),
+  mount(),
+  moveonenospc(false),
+  nullrw(false),
+  pid(::getpid()),
+  posix_acl(false),
+  readdirplus(false),
+  security_capability(true),
+  srcmounts(branches),
+  statfs(StatFS::ENUM::BASE),
+  statfs_ignore(StatFSIgnore::ENUM::NONE),
+  symlinkify(false),
+  symlinkify_timeout(3600),
+  threads(0),
+  version(MERGERFS_VERSION),
+  writeback_cache(false),
+  xattr(XAttr::ENUM::PASSTHROUGH)
+{
+  _map["async_read"]           = &async_read;
+  _map["auto_cache"]           = &auto_cache;
+  _map["branches"]             = &branches;
+  _map["cache.attr"]           = &cache_attr;
+  _map["cache.entry"]          = &cache_entry;
+  _map["cache.files"]          = &cache_files;
+  _map["cache.negative_entry"] = &cache_negative_entry;
+  _map["cache.readdir"]        = &cache_readdir;
+  _map["cache.statfs"]         = &cache_statfs;
+  _map["cache.symlinks"]       = &cache_symlinks;
+  _map["cache.writeback"]      = &writeback_cache;
+  _map["category.action"]      = &category.action;
+  _map["category.create"]      = &category.create;
+  _map["category.search"]      = &category.search;
+  _map["direct_io"]            = &direct_io;
+  _map["dropcacheonclose"]     = &dropcacheonclose;
+  _map["fsname"]               = &fsname;
+  _map["func.access"]          = &func.access;
+  _map["func.chmod"]           = &func.chmod;
+  _map["func.chown"]           = &func.chown;
+  _map["func.create"]          = &func.create;
+  _map["func.getattr"]         = &func.getattr;
+  _map["func.getxattr"]        = &func.getxattr;
+  _map["func.link"]            = &func.link;
+  _map["func.listxattr"]       = &func.listxattr;
+  _map["func.mkdir"]           = &func.mkdir;
+  _map["func.mknod"]           = &func.mknod;
+  _map["func.open"]            = &func.open;
+  _map["func.readlink"]        = &func.readlink;
+  _map["func.removexattr"]     = &func.removexattr;
+  _map["func.rename"]          = &func.rename;
+  _map["func.rmdir"]           = &func.rmdir;
+  _map["func.setxattr"]        = &func.setxattr;
+  _map["func.symlink"]         = &func.symlink;
+  _map["func.truncate"]        = &func.truncate;
+  _map["func.unlink"]          = &func.unlink;
+  _map["func.utimens"]         = &func.utimens;
+  _map["fuse_msg_size"]        = &fuse_msg_size;
+  _map["ignorepponrename"]     = &ignorepponrename;
+  _map["kernel_cache"]         = &kernel_cache;
+  _map["link_cow"]             = &link_cow;
+  _map["minfreespace"]         = &minfreespace;
+  _map["mount"]                = &mount;
+  _map["moveonenospc"]         = &moveonenospc;
+  _map["nullrw"]               = &nullrw;
+  _map["pid"]                  = &pid;
+  _map["posix_acl"]            = &posix_acl;
+  _map["readdirplus"]          = &readdirplus;
+  _map["security_capability"]  = &security_capability;
+  _map["srcmounts"]            = &srcmounts;
+  _map["statfs"]               = &statfs;
+  _map["statfs_ignore"]        = &statfs_ignore;
+  _map["symlinkify"]           = &symlinkify;
+  _map["symlinkify_timeout"]   = &symlinkify_timeout;
+  _map["threads"]              = &threads;
+  _map["version"]              = &version;
+  _map["xattr"]                = &xattr;
 }
 
-int
-Config::set_func_policy(const string &fusefunc_,
-                        const string &policy_)
+const
+Config&
+Config::ro(void)
 {
-  const Policy   *policy;
-  const FuseFunc *fusefunc;
+  return *((Config*)fuse_get_context()->private_data);
+}
+
+Config&
+Config::rw(void)
+{
+  return *((Config*)fuse_get_context()->private_data);
+}
 
-  fusefunc = FuseFunc::find(fusefunc_);
-  if(fusefunc == FuseFunc::invalid)
-    return (errno=ENODATA,-1);
+bool
+Config::has_key(const std::string &key_) const
+{
+  return _map.count(key_);
+}
 
-  policy = Policy::find(policy_);
-  if(policy == Policy::invalid)
-    return (errno=EINVAL,-1);
+void
+Config::keys(std::string &s_) const
+{
+  Str2TFStrMap::const_iterator i;
+  Str2TFStrMap::const_iterator ei;
 
-  policies[(FuseFunc::Enum::Type)*fusefunc] = policy;
+  s_.reserve(512);
 
-  return 0;
+  i  = _map.begin();
+  ei = _map.end();
+
+  for(; i != ei; ++i)
+    {
+      s_ += i->first;
+      s_ += '\0';
+    }
+
+  s_.resize(s_.size() - 1);
+}
+
+
+void
+Config::keys_xattr(std::string &s_) const
+{
+  Str2TFStrMap::const_iterator i;
+  Str2TFStrMap::const_iterator ei;
+
+  s_.reserve(1024);
+  for(i = _map.begin(), ei = _map.end(); i != ei; ++i)
+    {
+      s_ += "user.mergerfs.";
+      s_ += i->first;
+      s_ += '\0';
+    }
 }
 
 int
-Config::set_category_policy(const string &category_,
-                            const string &policy_)
+Config::get(const std::string &key_,
+            std::string       *val_) const
 {
-  const Policy   *policy;
-  const Category *category;
+  Str2TFStrMap::const_iterator i;
 
-  category = Category::find(category_);
-  if(category == Category::invalid)
-    return (errno=ENODATA,-1);
+  i = _map.find(key_);
+  if(i == _map.end())
+    return -ENOATTR;
 
-  policy = Policy::find(policy_);
-  if(policy == Policy::invalid)
-    return (errno=EINVAL,-1);
+  *val_ = i->second->to_string();
 
-  for(int i = 0; i < FuseFunc::Enum::END; i++)
+  return 0;
+}
+
+template<>
+std::string
+Config::StatFS::to_string() const
+{
+  switch(_data)
     {
-      if(FuseFunc::fusefuncs[i] == (Category::Enum::Type)*category)
-        policies[(FuseFunc::Enum::Type)FuseFunc::fusefuncs[i]] = policy;
+    case Config::StatFS::ENUM::BASE:
+      return "base";
+    case Config::StatFS::ENUM::FULL:
+      return "full";
     }
 
+  return "invalid";
+}
+
+template<>
+int
+Config::StatFS::from_string(const std::string &s_)
+{
+  if(s_ == "base")
+    _data = Config::StatFS::ENUM::BASE;
+  ef(s_ == "full")
+    _data = Config::StatFS::ENUM::FULL;
+  else
+    return -EINVAL;
+
   return 0;
 }
 
-Config::CacheFiles::operator int() const
+template<>
+std::string
+Config::StatFSIgnore::to_string() const
+{
+  switch(_data)
+    {
+    case Config::StatFSIgnore::ENUM::NONE:
+      return "none";
+    case Config::StatFSIgnore::ENUM::RO:
+      return "ro";
+    case Config::StatFSIgnore::ENUM::NC:
+      return "nc";
+    }
+
+  return "invalid";
+}
+
+template<>
+int
+Config::StatFSIgnore::from_string(const std::string &s_)
 {
-  return _data;
+  if(s_ == "none")
+    _data = Config::StatFSIgnore::ENUM::NONE;
+  ef(s_ == "ro")
+    _data = Config::StatFSIgnore::ENUM::RO;
+  ef(s_ == "nc")
+    _data = Config::StatFSIgnore::ENUM::NC;
+  else
+    return -EINVAL;
+
+  return 0;
 }
 
-Config::CacheFiles::operator std::string() const
+template<>
+std::string
+Config::CacheFiles::to_string() const
 {
   switch(_data)
     {
-    case OFF:
+    case Config::CacheFiles::ENUM::LIBFUSE:
+      return "libfuse";
+    case Config::CacheFiles::ENUM::OFF:
       return "off";
-    case PARTIAL:
+    case Config::CacheFiles::ENUM::PARTIAL:
       return "partial";
-    case FULL:
+    case Config::CacheFiles::ENUM::FULL:
       return "full";
-    case AUTO_FULL:
+    case Config::CacheFiles::ENUM::AUTO_FULL:
       return "auto-full";
-    case LIBFUSE:
-      return "libfuse";
-    case INVALID:
-      break;
     }
 
-  return "";
+  return "invalid";
 }
 
-Config::CacheFiles::CacheFiles()
-  : _data(INVALID)
+template<>
+int
+Config::CacheFiles::from_string(const std::string &s_)
 {
+  if(s_ == "libfuse")
+    _data = Config::CacheFiles::ENUM::LIBFUSE;
+  ef(s_ == "off")
+    _data = Config::CacheFiles::ENUM::OFF;
+  ef(s_ == "partial")
+    _data = Config::CacheFiles::ENUM::PARTIAL;
+  ef(s_ == "full")
+    _data = Config::CacheFiles::ENUM::FULL;
+  ef(s_ == "auto-full")
+    _data = Config::CacheFiles::ENUM::AUTO_FULL;
+  else
+    return -EINVAL;
 
+  return 0;
 }
 
-Config::CacheFiles::CacheFiles(Config::CacheFiles::Enum data_)
-  : _data(data_)
+template<>
+std::string
+Config::XAttr::to_string() const
 {
+  switch(_data)
+    {
+    case Config::XAttr::ENUM::PASSTHROUGH:
+      return "passthrough";
+    case Config::XAttr::ENUM::NOSYS:
+      return "nosys";
+    case Config::XAttr::ENUM::NOATTR:
+      return "noattr";
+    }
 
+  return "invalid";
 }
 
-bool
-Config::CacheFiles::valid() const
+template<>
+int
+Config::XAttr::from_string(const std::string &s_)
 {
-  return (_data != INVALID);
+  if(s_ == "passthrough")
+    _data = Config::XAttr::ENUM::PASSTHROUGH;
+  ef(s_ == "nosys")
+    _data = Config::XAttr::ENUM::NOSYS;
+  ef(s_ == "noattr")
+    _data = Config::XAttr::ENUM::NOATTR;
+  else
+    return -EINVAL;
+
+  return 0;
 }
 
-Config::CacheFiles&
-Config::CacheFiles::operator=(const Config::CacheFiles::Enum data_)
+int
+Config::set_raw(const std::string &key_,
+                const std::string &value_)
 {
-  _data = data_;
+  Str2TFStrMap::iterator i;
 
-  return *this;
+  i = _map.find(key_);
+  if(i == _map.end())
+    return -ENOATTR;
+
+  return i->second->from_string(value_);
 }
 
-Config::CacheFiles&
-Config::CacheFiles::operator=(const std::string &data_)
+int
+Config::set(const std::string &key_,
+            const std::string &value_)
 {
-  if(data_ == "off")
-    _data = OFF;
-  else if(data_ == "partial")
-    _data = PARTIAL;
-  else if(data_ == "full")
-    _data = FULL;
-  else if(data_ == "auto-full")
-    _data = AUTO_FULL;
-  else if(data_ == "libfuse")
-    _data = LIBFUSE;
-  else
-    _data = INVALID;
+  if(l::readonly(key_))
+    return -EINVAL;
+
+  return set_raw(key_,value_);
+}
+
+
+std::ostream&
+operator<<(std::ostream &os_,
+           const Config &c_)
+{
+  Str2TFStrMap::const_iterator i;
+  Str2TFStrMap::const_iterator ei;
+
+  for(i = c_._map.begin(), ei = c_._map.end(); i != ei; ++i)
+    {
+      os_ << i->first << '=' << i->second << '\n';
+    }
 
-  return *this;
+  return os_;
 }

src/config.hpp

@@ -17,9 +17,13 @@
 #pragma once
 
 #include "branch.hpp"
-#include "fusefunc.hpp"
+#include "enum.hpp"
+#include "errno.hpp"
+#include "func_category.hpp"
+#include "funcs.hpp"
 #include "policy.hpp"
 #include "policy_cache.hpp"
+#include "tofrom_wrapper.hpp"
 
 #include <fuse.h>
 
@@ -29,145 +33,113 @@
 #include <stdint.h>
 #include <sys/stat.h>
 
+typedef ToFromWrapper<bool>                 ConfigBOOL;
+typedef ToFromWrapper<uint64_t>             ConfigUINT64;
+typedef ToFromWrapper<int>                  ConfigINT;
+typedef ToFromWrapper<std::string>          ConfigSTR;
+typedef std::map<std::string,ToFromString*> Str2TFStrMap;
+
 class Config
 {
 public:
-  struct StatFS
-  {
-    enum Enum
-      {
-        BASE,
-        FULL
-      };
-  };
-
-  struct StatFSIgnore
-  {
-    enum Enum
-      {
-        NONE,
-        RO,
-        NC
-      };
-  };
-
-  class CacheFiles
-  {
-  public:
-    enum Enum
-      {
-        INVALID = -1,
-        LIBFUSE,
-        OFF,
-        PARTIAL,
-        FULL,
-        AUTO_FULL
-      };
-
-    CacheFiles();
-    CacheFiles(Enum);
-
-    operator int() const;
-    operator std::string() const;
-
-    CacheFiles& operator=(const Enum);
-    CacheFiles& operator=(const std::string&);
-
-    bool valid() const;
-
-  private:
-    Enum _data;
-  };
+  enum class StatFSEnum
+    {
+      BASE,
+      FULL
+    };
+  typedef Enum<StatFSEnum> StatFS;
+
+  enum class StatFSIgnoreEnum
+    {
+      NONE,
+      RO,
+      NC
+    };
+  typedef Enum<StatFSIgnoreEnum> StatFSIgnore;
+
+  enum class CacheFilesEnum
+    {
+      LIBFUSE,
+      OFF,
+      PARTIAL,
+      FULL,
+      AUTO_FULL
+    };
+  typedef Enum<CacheFilesEnum> CacheFiles;
+
+  enum class XAttrEnum
+    {
+      PASSTHROUGH = 0,
+      NOSYS       = ENOSYS,
+      NOATTR      = ENOATTR
+    };
+  typedef Enum<XAttrEnum> XAttr;
 
 public:
   Config();
 
 public:
-  int set_func_policy(const std::string &fusefunc_,
-                      const std::string &policy_);
-  int set_category_policy(const std::string &category_,
-                          const std::string &policy_);
+  mutable PolicyCache open_cache;
 
 public:
-  std::string              fsname;
-  std::string              destmount;
-  Branches                 branches;
-  mutable pthread_rwlock_t branches_lock;
-  uint64_t                 minfreespace;
-  bool                     moveonenospc;
-  bool                     direct_io;
-  bool                     kernel_cache;
-  bool                     auto_cache;
-  bool                     dropcacheonclose;
-  bool                     symlinkify;
-  time_t                   symlinkify_timeout;
-  bool                     nullrw;
-  bool                     ignorepponrename;
-  bool                     security_capability;
-  bool                     link_cow;
-  int                      xattr;
-  StatFS::Enum             statfs;
-  StatFSIgnore::Enum       statfs_ignore;
-  bool                     posix_acl;
-  bool                     cache_symlinks;
-  bool                     cache_readdir;
-  bool                     async_read;
-  bool                     writeback_cache;
-  bool                     readdirplus;
-  CacheFiles               cache_files;
-  uint16_t                 fuse_msg_size;
+  const std::string controlfile;
 
 public:
-  const Policy  *policies[FuseFunc::Enum::END];
-  const Policy *&access;
-  const Policy *&chmod;
-  const Policy *&chown;
-  const Policy *&create;
-  const Policy *&getattr;
-  const Policy *&getxattr;
-  const Policy *&link;
-  const Policy *&listxattr;
-  const Policy *&mkdir;
-  const Policy *&mknod;
-  const Policy *&open;
-  const Policy *&readlink;
-  const Policy *&removexattr;
-  const Policy *&rename;
-  const Policy *&rmdir;
-  const Policy *&setxattr;
-  const Policy *&symlink;
-  const Policy *&truncate;
-  const Policy *&unlink;
-  const Policy *&utimens;
+  ConfigBOOL     async_read;
+  ConfigBOOL     auto_cache;
+  Branches       branches;
+  ConfigUINT64   cache_attr;
+  ConfigUINT64   cache_entry;
+  CacheFiles     cache_files;
+  ConfigUINT64   cache_negative_entry;
+  ConfigBOOL     cache_readdir;
+  ConfigUINT64   cache_statfs;
+  ConfigBOOL     cache_symlinks;
+  FuncCategories category;
+  ConfigBOOL     direct_io;
+  ConfigBOOL     dropcacheonclose;
+  ConfigSTR      fsname;
+  Funcs          func;
+  ConfigUINT64   fuse_msg_size;
+  ConfigBOOL     ignorepponrename;
+  ConfigBOOL     kernel_cache;
+  ConfigBOOL     link_cow;
+  ConfigUINT64   minfreespace;
+  ConfigSTR      mount;
+  ConfigBOOL     moveonenospc;
+  ConfigBOOL     nullrw;
+  ConfigUINT64   pid;
+  ConfigBOOL     posix_acl;
+  ConfigBOOL     readdirplus;
+  ConfigBOOL     security_capability;
+  SrcMounts      srcmounts;
+  StatFS         statfs;
+  StatFSIgnore   statfs_ignore;
+  ConfigBOOL     symlinkify;
+  ConfigUINT64   symlinkify_timeout;
+  ConfigINT      threads;
+  ConfigSTR      version;
+  ConfigBOOL     writeback_cache;
+  XAttr          xattr;
 
 public:
-  mutable PolicyCache open_cache;
+  friend std::ostream& operator<<(std::ostream &s,
+                                  const Config &c);
 
 public:
-  const std::string controlfile;
+  bool has_key(const std::string &key) const;
+  void keys(std::string &s) const;
+  void keys_xattr(std::string &s) const;
+
+public:
+  int get(const std::string &key, std::string *val) const;
+  int set_raw(const std::string &key, const std::string &val);
+  int set(const std::string &key, const std::string &val);
 
 public:
-  static
-  const
-  Config &
-  get(void)
-  {
-    const fuse_context *fc = fuse_get_context();
-
-    return get(fc);
-  }
-
-  static
-  const Config &
-  get(const fuse_context *fc)
-  {
-    return *((Config*)fc->private_data);
-  }
-
-  static
-  Config &
-  get_writable(void)
-  {
-    return (*((Config*)fuse_get_context()->private_data));
-  }
+  static const Config &ro(void);
+  static Config       &rw(void);
+
+private:
+  Str2TFStrMap _map;
 };

src/dirinfo.hpp

@@ -16,16 +16,15 @@
 
 #pragma once
 
+#include "fh.hpp"
+
 #include <string>
 
-class DirInfo
+class DirInfo : public FH
 {
 public:
   DirInfo(const char *fusepath_)
-    : fusepath(fusepath_)
+    : FH(fusepath_)
   {
   }
-
-public:
-  std::string fusepath;
 };

src/ef.hpp

@@ -0,0 +1,21 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#define ef(X) else if(X)

src/enum.hpp

@@ -0,0 +1,78 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "tofrom_string.hpp"
+
+#include <string>
+
+template<typename E>
+class Enum : public ToFromString
+{
+public:
+  typedef E ENUM;
+
+public:
+  Enum<ENUM>()
+  {
+  }
+
+  Enum<ENUM>(const ENUM data_)
+    : _data(data_)
+  {
+  }
+
+public:
+  Enum<ENUM>&
+  operator=(const ENUM data_)
+  {
+    _data = data_;
+    return *this;
+  }
+
+  Enum<ENUM>&
+  operator=(const std::string &s_)
+  {
+    from_string(s_);
+    return *this;
+  }
+
+public:
+  operator ENUM() const
+  {
+    return _data;
+  }
+
+public:
+  bool operator==(const ENUM data_) const
+  {
+    return (_data == data_);
+  }
+
+public:
+  std::string to_string() const;
+  int from_string(const std::string &);
+
+public:
+  int to_int() const
+  {
+    return (int)_data;
+  }
+
+private:
+  ENUM _data;
+};

src/fh.hpp

@@ -0,0 +1,31 @@
+/*
+  Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include <string>
+
+class FH
+{
+public:
+  FH(const char *fusepath_)
+    : fusepath(fusepath_)
+  {
+  }
+
+public:
+  std::string fusepath;
+};

src/fileinfo.hpp

@@ -16,19 +16,20 @@
 
 #pragma once
 
+#include "fh.hpp"
+
 #include <string>
 
-class FileInfo
+class FileInfo : public FH
 {
 public:
   FileInfo(const int   fd_,
            const char *fusepath_)
-    : fd(fd_),
-      fusepath(fusepath_)
+    : FH(fusepath_),
+      fd(fd_)
   {
   }
 
 public:
   int fd;
-  std::string fusepath;
 };

src/from_string.cpp

@@ -0,0 +1,115 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "ef.hpp"
+
+#include <string>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+namespace str
+{
+  int
+  from(const std::string &value_,
+       bool              *bool_)
+  {
+    if((value_ == "true") ||
+       (value_ == "1")    ||
+       (value_ == "on")   ||
+       (value_ == "yes"))
+      *bool_ = true;
+    ef((value_ == "false") ||
+       (value_ == "0")     ||
+       (value_ == "off")   ||
+       (value_ == "no"))
+      *bool_ = false;
+    else
+      return -EINVAL;
+
+    return 0;
+  }
+
+  int
+  from(const std::string &value_,
+       int               *int_)
+  {
+    *int_ = ::strtol(value_.c_str(),NULL,10);
+
+    return 0;
+  }
+
+  int
+  from(const std::string &value_,
+       uint64_t          *uint64_)
+  {
+    char *endptr;
+    uint64_t tmp;
+
+    tmp = ::strtoll(value_.c_str(),&endptr,10);
+    switch(*endptr)
+      {
+      case 'k':
+      case 'K':
+        tmp *= 1024;
+        break;
+
+      case 'm':
+      case 'M':
+        tmp *= (1024 * 1024);
+        break;
+
+      case 'g':
+      case 'G':
+        tmp *= (1024 * 1024 * 1024);
+        break;
+
+      case 't':
+      case 'T':
+        tmp *= (1024ULL * 1024 * 1024 * 1024);
+        break;
+
+      case '\0':
+        break;
+
+      default:
+        return -EINVAL;
+      }
+
+    *uint64_ = tmp;
+
+    return 0;
+  }
+
+  int
+  from(const std::string &value_,
+       std::string       *str_)
+  {
+    *str_ = value_;
+
+    return 0;
+  }
+
+  int
+  from(const std::string &value_,
+       const std::string *key_)
+  {
+    return -EINVAL;
+  }
+}

src/from_string.hpp

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include <string>
+
+#include <stdint.h>
+
+namespace str
+{
+  int from(const std::string &, bool *);
+  int from(const std::string &, int *);
+  int from(const std::string &, uint64_t *);
+  int from(const std::string &, std::string *);
+  int from(const std::string &, const std::string *);
+}

src/func.cpp

@@ -0,0 +1,39 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "func.hpp"
+
+int
+Func::from_string(const std::string &s_)
+{
+  const Policy *tmp;
+
+  tmp = &Policy::find(s_);
+  if(tmp == Policy::invalid)
+    return -EINVAL;
+
+  policy = tmp;
+
+  return 0;
+}
+
+std::string
+Func::to_string(void) const
+{
+  return policy->to_string();
+}

src/func.hpp

@@ -0,0 +1,221 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "policy.hpp"
+#include "tofrom_string.hpp"
+
+#include <string>
+#include <iostream>
+
+class Func : public ToFromString
+{
+public:
+  Func(const Policy &policy_)
+    : policy(&policy_)
+  {
+  }
+
+public:
+  int from_string(const std::string &s);
+  std::string to_string() const;
+
+public:
+  const Policy *policy;
+};
+
+class FuncAccess : public Func
+{
+public:
+  FuncAccess()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncChmod : public Func
+{
+public:
+  FuncChmod()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncChown : public Func
+{
+public:
+  FuncChown()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncCreate : public Func
+{
+public:
+  FuncCreate()
+    : Func(Policy::epmfs)
+  {
+  }
+};
+
+class FuncGetAttr : public Func
+{
+public:
+  FuncGetAttr()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncGetXAttr : public Func
+{
+public:
+  FuncGetXAttr()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncLink : public Func
+{
+public:
+  FuncLink()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncListXAttr : public Func
+{
+public:
+  FuncListXAttr()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncMkdir : public Func
+{
+public:
+  FuncMkdir()
+    : Func(Policy::epmfs)
+  {
+  }
+};
+
+class FuncMknod : public Func
+{
+public:
+  FuncMknod()
+    : Func(Policy::epmfs)
+  {
+  }
+};
+
+class FuncOpen : public Func
+{
+public:
+  FuncOpen()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncReadlink : public Func
+{
+public:
+  FuncReadlink()
+    : Func(Policy::ff)
+  {
+  }
+};
+
+class FuncRemoveXAttr : public Func
+{
+public:
+  FuncRemoveXAttr()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncRename : public Func
+{
+public:
+  FuncRename()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncRmdir : public Func
+{
+public:
+  FuncRmdir()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncSetXAttr : public Func
+{
+public:
+  FuncSetXAttr()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncSymlink : public Func
+{
+public:
+  FuncSymlink()
+    : Func(Policy::epmfs)
+  {
+  }
+};
+
+class FuncTruncate : public Func
+{
+public:
+  FuncTruncate()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncUnlink : public Func
+{
+public:
+  FuncUnlink()
+    : Func(Policy::epall)
+  {
+  }
+};
+
+class FuncUtimens : public Func
+{
+public:
+  FuncUtimens()
+    : Func(Policy::epall)
+  {
+  }
+};

src/func_category.cpp

@@ -0,0 +1,90 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "func_category.hpp"
+#include "str.hpp"
+
+#include "buildvector.hpp"
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+int
+FuncCategory::from_string(const std::string &s_)
+{
+  const Policy *tmp;
+
+  tmp = &Policy::find(s_);
+  if(tmp == &Policy::invalid)
+    return -EINVAL;
+
+  for(uint64_t i = 0; i < _funcs.size(); i++)
+    _funcs[i]->policy = tmp;
+
+  return 0;
+}
+
+std::string
+FuncCategory::to_string(void) const
+{
+  std::vector<std::string> rv;
+
+  for(uint64_t i = 0; i < _funcs.size(); i++)
+    rv.push_back(_funcs[i]->policy->to_string());
+
+  std::sort(rv.begin(),rv.end());
+  rv.erase(std::unique(rv.begin(),rv.end()),rv.end());
+
+  return str::join(rv,',');
+}
+
+FuncCategoryCreate::FuncCategoryCreate(Funcs &funcs_)
+{
+  _funcs = buildvector<Func*>
+    (&funcs_.create)
+    (&funcs_.mkdir)
+    (&funcs_.mknod)
+    (&funcs_.symlink);
+}
+
+FuncCategoryAction::FuncCategoryAction(Funcs &funcs_)
+{
+  _funcs = buildvector<Func*>
+    (&funcs_.chmod)
+    (&funcs_.chown)
+    (&funcs_.link)
+    (&funcs_.removexattr)
+    (&funcs_.rename)
+    (&funcs_.rmdir)
+    (&funcs_.setxattr)
+    (&funcs_.truncate)
+    (&funcs_.unlink)
+    (&funcs_.utimens);
+}
+
+FuncCategorySearch::FuncCategorySearch(Funcs &funcs_)
+{
+  _funcs = buildvector<Func*>
+    (&funcs_.access)
+    (&funcs_.getattr)
+    (&funcs_.getxattr)
+    (&funcs_.listxattr)
+    (&funcs_.open)
+    (&funcs_.readlink);
+}

src/func_category.hpp

@@ -0,0 +1,69 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "funcs.hpp"
+#include "tofrom_string.hpp"
+
+#include <string>
+#include <vector>
+
+class FuncCategory : public ToFromString
+{
+public:
+  int from_string(const std::string &);
+  std::string to_string(void) const;
+
+protected:
+  std::vector<Func*> _funcs;
+};
+
+class FuncCategoryCreate : public FuncCategory
+{
+public:
+  FuncCategoryCreate(Funcs &funcs_);
+};
+
+class FuncCategoryAction : public FuncCategory
+{
+public:
+  FuncCategoryAction(Funcs &funcs_);
+};
+
+class FuncCategorySearch : public FuncCategory
+{
+public:
+  FuncCategorySearch(Funcs &funcs_);
+};
+
+class FuncCategories
+{
+public:
+  FuncCategories(Funcs &funcs_)
+    : action(funcs_),
+      create(funcs_),
+      search(funcs_)
+  {
+  }
+
+public:
+  FuncCategoryAction action;
+  FuncCategoryCreate create;
+  FuncCategorySearch search;
+};

src/funcs.hpp

@@ -0,0 +1,46 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "func.hpp"
+
+class Funcs
+{
+public:
+  FuncAccess      access;
+  FuncChmod       chmod;
+  FuncChown       chown;
+  FuncCreate      create;
+  FuncGetAttr     getattr;
+  FuncGetXAttr    getxattr;
+  FuncLink        link;
+  FuncListXAttr   listxattr;
+  FuncMkdir       mkdir;
+  FuncMknod       mknod;
+  FuncOpen        open;
+  FuncReadlink    readlink;
+  FuncRemoveXAttr removexattr;
+  FuncRename      rename;
+  FuncRmdir       rmdir;
+  FuncSetXAttr    setxattr;
+  FuncSymlink     symlink;
+  FuncTruncate    truncate;
+  FuncUnlink      unlink;
+  FuncUtimens     utimens;
+};

src/fuse_access.cpp

@@ -14,16 +14,15 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <string>
-#include <vector>
-
 #include "config.hpp"
 #include "errno.hpp"
 #include "fs_base_access.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
+#include <string>
+#include <vector>
+
 using std::string;
 using std::vector;
 
@@ -39,9 +38,9 @@ namespace l
   {
     int rv;
     string fullpath;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc(branches_,fusepath,minfreespace,basepaths);
+    rv = searchFunc(branches_,fusepath,minfreespace,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -59,12 +58,11 @@ namespace FUSE
   access(const char *fusepath,
          int         mask)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::access(config.access,
+    return l::access(config.func.access.policy,
                      config.branches,
                      config.minfreespace,
                      fusepath,

src/fuse_chmod.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_chmod.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -34,7 +33,7 @@ namespace l
 {
   static
   int
-  chmod_loop_core(const string *basepath_,
+  chmod_loop_core(const string &basepath_,
                   const char   *fusepath_,
                   const mode_t  mode_,
                   const int     error_)
@@ -51,9 +50,9 @@ namespace l
 
   static
   int
-  chmod_loop(const vector<const string*> &basepaths_,
-             const char                  *fusepath_,
-             const mode_t                 mode_)
+  chmod_loop(const vector<string> &basepaths_,
+             const char           *fusepath_,
+             const mode_t          mode_)
   {
     int error;
 
@@ -75,9 +74,9 @@ namespace l
         const mode_t          mode_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -91,12 +90,11 @@ namespace FUSE
   chmod(const char *fusepath_,
         mode_t      mode_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::chmod(config.chmod,
+    return l::chmod(config.func.chmod.policy,
                     config.branches,
                     config.minfreespace,
                     fusepath_,

src/fuse_chown.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_chown.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -34,7 +33,7 @@ namespace l
 {
   static
   int
-  chown_loop_core(const string *basepath_,
+  chown_loop_core(const string &basepath_,
                   const char   *fusepath_,
                   const uid_t   uid_,
                   const gid_t   gid_,
@@ -52,10 +51,10 @@ namespace l
 
   static
   int
-  chown_loop(const vector<const string*> &basepaths_,
-             const char                  *fusepath_,
-             const uid_t                  uid_,
-             const gid_t                  gid_)
+  chown_loop(const vector<string> &basepaths_,
+             const char           *fusepath_,
+             const uid_t           uid_,
+             const gid_t           gid_)
   {
     int error;
 
@@ -78,9 +77,9 @@ namespace l
         const gid_t           gid_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -95,12 +94,11 @@ namespace FUSE
         uid_t       uid_,
         gid_t       gid_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::chown(config.chown,
+    return l::chown(config.func.chown.policy,
                     config.branches,
                     config.minfreespace,
                     fusepath_,

src/fuse_create.cpp

@@ -21,7 +21,6 @@
 #include "fs_base_open.hpp"
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -61,27 +60,27 @@ namespace l
   {
     switch(config_.cache_files)
       {
-      case CacheFiles::LIBFUSE:
+      case CacheFiles::ENUM::LIBFUSE:
         ffi_->direct_io  = config_.direct_io;
         ffi_->keep_cache = config_.kernel_cache;
         ffi_->auto_cache = config_.auto_cache;
         break;
-      case CacheFiles::OFF:
+      case CacheFiles::ENUM::OFF:
         ffi_->direct_io  = 1;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::PARTIAL:
+      case CacheFiles::ENUM::PARTIAL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::FULL:
+      case CacheFiles::ENUM::FULL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 1;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::AUTO_FULL:
+      case CacheFiles::ENUM::AUTO_FULL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 1;
@@ -140,24 +139,24 @@ namespace l
     int rv;
     string fullpath;
     string fusedirpath;
-    vector<const string*> createpaths;
-    vector<const string*> existingpaths;
+    vector<string> createpaths;
+    vector<string> existingpaths;
 
     fusedirpath = fs::path::dirname(fusepath_);
 
-    rv = searchFunc_(branches_,fusedirpath,minfreespace_,existingpaths);
+    rv = searchFunc_(branches_,fusedirpath,minfreespace_,&existingpaths);
     if(rv == -1)
       return -errno;
 
-    rv = createFunc_(branches_,fusedirpath,minfreespace_,createpaths);
+    rv = createFunc_(branches_,fusedirpath,minfreespace_,&createpaths);
     if(rv == -1)
       return -errno;
 
-    rv = fs::clonepath_as_root(*existingpaths[0],*createpaths[0],fusedirpath);
+    rv = fs::clonepath_as_root(existingpaths[0],createpaths[0],fusedirpath);
     if(rv == -1)
       return -errno;
 
-    return l::create_core(*createpaths[0],
+    return l::create_core(createpaths[0],
                           fusepath_,
                           mode_,
                           umask_,
@@ -173,18 +172,17 @@ namespace FUSE
          mode_t          mode_,
          fuse_file_info *ffi_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
     l::config_to_ffi_flags(config,ffi_);
 
     if(config.writeback_cache)
       l::tweak_flags_writeback_cache(&ffi_->flags);
 
-    return l::create(config.getattr,
-                     config.create,
+    return l::create(config.func.getattr.policy,
+                     config.func.create.policy,
                      config.branches,
                      config.minfreespace,
                      fusepath_,

src/fuse_fgetattr.cpp

@@ -14,6 +14,7 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include "config.hpp"
 #include "errno.hpp"
 #include "fileinfo.hpp"
 #include "fs_base_stat.hpp"
@@ -43,13 +44,22 @@ namespace l
 namespace FUSE
 {
   int
-  fgetattr(const char     *fusepath_,
-           struct stat    *st_,
-           fuse_file_info *ffi_)
+  fgetattr(const char      *fusepath_,
+           struct stat     *st_,
+           fuse_file_info  *ffi_,
+           fuse_timeouts_t *timeout_)
   {
+    int rv;
+    const Config &config = Config::ro();
     FileInfo *fi = reinterpret_cast<FileInfo*>(ffi_->fh);
 
-    return l::fgetattr(fi->fd,st_);
+    rv = l::fgetattr(fi->fd,st_);
+
+    timeout_->entry = ((rv >= 0) ?
+                       config.cache_entry :
+                       config.cache_negative_entry);
+    timeout_->attr  = config.cache_attr;
+
+    return rv;
   }
 }
-

src/fuse_fgetattr.hpp

@@ -25,7 +25,8 @@
 namespace FUSE
 {
   int
-  fgetattr(const char     *fusepath_,
-           struct stat    *st_,
-           fuse_file_info *ffi_);
+  fgetattr(const char      *fusepath,
+           struct stat     *st,
+           fuse_file_info  *ffi,
+           fuse_timeouts_t *timeout);
 }

src/fuse_getattr.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_stat.hpp"
 #include "fs_inode.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "symlinkify.hpp"
 #include "ugid.hpp"
 
@@ -70,9 +69,9 @@ namespace l
   {
     int rv;
     string fullpath;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -94,24 +93,32 @@ namespace l
 namespace FUSE
 {
   int
-  getattr(const char  *fusepath_,
-          struct stat *st_)
+  getattr(const char      *fusepath_,
+          struct stat     *st_,
+          fuse_timeouts_t *timeout_)
   {
-    const fuse_context *fc     = fuse_get_context();
-    const Config       &config = Config::get(fc);
+    int rv;
+    const Config &config = Config::ro();
 
     if(fusepath_ == config.controlfile)
       return l::getattr_controlfile(st_);
 
-    const ugid::Set         ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard readlock(&config.branches_lock);
+    const fuse_context *fc = fuse_get_context();
+    const ugid::Set     ugid(fc->uid,fc->gid);
+
+    rv = l::getattr(config.func.getattr.policy,
+                    config.branches,
+                    config.minfreespace,
+                    fusepath_,
+                    st_,
+                    config.symlinkify,
+                    config.symlinkify_timeout);
+
+    timeout_->entry = ((rv >= 0) ?
+                       config.cache_entry :
+                       config.cache_negative_entry);
+    timeout_->attr  = config.cache_attr;
 
-    return l::getattr(config.getattr,
-                      config.branches,
-                      config.minfreespace,
-                      fusepath_,
-                      st_,
-                      config.symlinkify,
-                      config.symlinkify_timeout);
+    return rv;
   }
 }

src/fuse_getattr.hpp

@@ -23,6 +23,7 @@
 namespace FUSE
 {
   int
-  getattr(const char  *fusepath_,
-          struct stat *buf_);
+  getattr(const char      *fusepath,
+          struct stat     *buf,
+          fuse_timeouts_t *timeout);
 }

src/fuse_getxattr.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_getxattr.hpp"
 #include "fs_path.hpp"
 #include "fs_statvfs_cache.hpp"
-#include "rwlock.hpp"
 #include "str.hpp"
 #include "ugid.hpp"
 #include "version.hpp"
@@ -27,7 +26,6 @@
 #include <fuse.h>
 
 #include <algorithm>
-#include <set>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -39,7 +37,6 @@ static const char SECURITY_CAPABILITY[] = "security.capability";
 
 using std::string;
 using std::vector;
-using std::set;
 
 namespace l
 {
@@ -64,254 +61,6 @@ namespace l
     return ((rv == -1) ? -errno : rv);
   }
 
-  static
-  void
-  getxattr_controlfile_fusefunc_policy(const Config &config_,
-                                       const string &attr_,
-                                       string       &attrvalue_)
-  {
-    FuseFunc fusefunc;
-
-    fusefunc = FuseFunc::find(attr_);
-    if(fusefunc != FuseFunc::invalid)
-      attrvalue_ = (std::string)*config_.policies[(FuseFunc::Enum::Type)*fusefunc];
-  }
-
-  static
-  void
-  getxattr_controlfile_category_policy(const Config &config_,
-                                       const string &attr_,
-                                       string       &attrvalue_)
-  {
-    Category cat;
-
-    cat = Category::find(attr_);
-    if(cat != Category::invalid)
-      {
-        vector<string> policies;
-        for(int i = FuseFunc::Enum::BEGIN; i < FuseFunc::Enum::END; i++)
-          {
-            if(cat == (Category::Enum::Type)*FuseFunc::fusefuncs[i])
-              policies.push_back(*config_.policies[i]);
-          }
-
-        std::sort(policies.begin(),policies.end());
-        policies.erase(std::unique(policies.begin(),policies.end()),
-                       policies.end());
-        attrvalue_ = str::join(policies,',');
-      }
-  }
-
-  static
-  void
-  getxattr_controlfile_srcmounts(const Config &config_,
-                                 string       &attrvalue_)
-  {
-    attrvalue_ = config_.branches.to_string();
-  }
-
-  static
-  void
-  getxattr_controlfile_branches(const Config &config_,
-                                string       &attrvalue_)
-  {
-    attrvalue_ = config_.branches.to_string(true);
-  }
-
-  static
-  void
-  getxattr_controlfile_uint64_t(const uint64_t  uint_,
-                                string         &attrvalue_)
-  {
-    std::ostringstream os;
-
-    os << uint_;
-
-    attrvalue_ = os.str();
-  }
-
-  static
-  void
-  getxattr_controlfile_double(const double  d_,
-                              string       &attrvalue_)
-  {
-    std::ostringstream os;
-
-    os << d_;
-
-    attrvalue_ = os.str();
-  }
-
-  static
-  void
-  getxattr_controlfile_time_t(const time_t  time,
-                              string       &attrvalue)
-  {
-    std::ostringstream os;
-
-    os << time;
-
-    attrvalue = os.str();
-  }
-
-  static
-  void
-  getxattr_controlfile_bool(const bool  boolvalue,
-                            string     &attrvalue)
-  {
-    attrvalue = (boolvalue ? "true" : "false");
-  }
-
-  static
-  void
-  getxattr_controlfile_errno(const int  errno_,
-                             string    &attrvalue)
-  {
-    switch(errno_)
-      {
-      case 0:
-        attrvalue = "passthrough";
-        break;
-      case ENOATTR:
-        attrvalue = "noattr";
-        break;
-      case ENOSYS:
-        attrvalue = "nosys";
-        break;
-      default:
-        attrvalue = "ERROR";
-        break;
-      }
-  }
-
-  static
-  void
-  getxattr_controlfile_statfs(const Config::StatFS::Enum  enum_,
-                              string                     &attrvalue_)
-  {
-    switch(enum_)
-      {
-      case Config::StatFS::BASE:
-        attrvalue_ = "base";
-        break;
-      case Config::StatFS::FULL:
-        attrvalue_ = "full";
-        break;
-      default:
-        attrvalue_ = "ERROR";
-        break;
-      }
-  }
-
-  static
-  void
-  getxattr_controlfile_statfsignore(const Config::StatFSIgnore::Enum  enum_,
-                                    string                           &attrvalue_)
-  {
-    switch(enum_)
-      {
-      case Config::StatFSIgnore::NONE:
-        attrvalue_ = "none";
-        break;
-      case Config::StatFSIgnore::RO:
-        attrvalue_ = "ro";
-        break;
-      case Config::StatFSIgnore::NC:
-        attrvalue_ = "nc";
-        break;
-      default:
-        attrvalue_ = "ERROR";
-        break;
-      }
-  }
-
-  static
-  void
-  getxattr_controlfile(const Config::CacheFiles &cache_files_,
-                       string                   &attrvalue_)
-  {
-    attrvalue_ = (string)cache_files_;
-  }
-
-  static
-  void
-  getxattr_controlfile(const uint16_t &uint16_,
-                       string         &attrvalue_)
-  {
-    std::ostringstream os;
-
-    os << uint16_;
-
-    attrvalue_ = os.str();
-  }
-
-  static
-  void
-  getxattr_controlfile_policies(const Config &config,
-                                string       &attrvalue)
-  {
-    size_t i = Policy::Enum::begin();
-
-    attrvalue = (string)Policy::policies[i];
-    for(i++; i < Policy::Enum::end(); i++)
-      attrvalue += ',' + (string)Policy::policies[i];
-  }
-
-  static
-  void
-  getxattr_controlfile_version(string &attrvalue)
-  {
-    attrvalue = MERGERFS_VERSION;
-    if(attrvalue.empty())
-      attrvalue = "unknown_possible_problem_with_build";
-  }
-
-  static
-  void
-  getxattr_controlfile_pid(string &attrvalue)
-  {
-    int pid;
-    char buf[32];
-
-    pid = getpid();
-    snprintf(buf,sizeof(buf),"%d",pid);
-
-    attrvalue = buf;
-  }
-
-  static
-  void
-  getxattr_controlfile_cache_attr(string &attrvalue)
-  {
-    double d;
-
-    d = fuse_config_get_attr_timeout(fuse_get_context()->fuse);
-
-    l::getxattr_controlfile_double(d,attrvalue);
-  }
-
-  static
-  void
-  getxattr_controlfile_cache_entry(string &attrvalue)
-  {
-    double d;
-
-    d = fuse_config_get_entry_timeout(fuse_get_context()->fuse);
-
-    l::getxattr_controlfile_double(d,attrvalue);
-  }
-
-  static
-  void
-  getxattr_controlfile_cache_negative_entry(string &attrvalue)
-  {
-    double d;
-
-    d = fuse_config_get_negative_entry_timeout(fuse_get_context()->fuse);
-
-    l::getxattr_controlfile_double(d,attrvalue);
-  }
-
   static
   int
   getxattr_controlfile(const Config &config,
@@ -319,93 +68,21 @@ namespace l
                        char         *buf,
                        const size_t  count)
   {
+    int rv;
     size_t len;
-    string attrvalue;
+    string key;
+    string val;
     vector<string> attr;
 
-    str::split(attr,attrname,'.');
-    if((attr[0] != "user") || (attr[1] != "mergerfs"))
+    if(!str::startswith(attrname,"user.mergerfs."))
       return -ENOATTR;
 
-    switch(attr.size())
-      {
-      case 3:
-        if(attr[2] == "srcmounts")
-          l::getxattr_controlfile_srcmounts(config,attrvalue);
-        else if(attr[2] == "branches")
-          l::getxattr_controlfile_branches(config,attrvalue);
-        else if(attr[2] == "minfreespace")
-          l::getxattr_controlfile_uint64_t(config.minfreespace,attrvalue);
-        else if(attr[2] == "moveonenospc")
-          l::getxattr_controlfile_bool(config.moveonenospc,attrvalue);
-        else if(attr[2] == "dropcacheonclose")
-          l::getxattr_controlfile_bool(config.dropcacheonclose,attrvalue);
-        else if(attr[2] == "symlinkify")
-          l::getxattr_controlfile_bool(config.symlinkify,attrvalue);
-        else if(attr[2] == "symlinkify_timeout")
-          l::getxattr_controlfile_time_t(config.symlinkify_timeout,attrvalue);
-        else if(attr[2] == "nullrw")
-          l::getxattr_controlfile_bool(config.nullrw,attrvalue);
-        else if(attr[2] == "ignorepponrename")
-          l::getxattr_controlfile_bool(config.ignorepponrename,attrvalue);
-        else if(attr[2] == "security_capability")
-          l::getxattr_controlfile_bool(config.security_capability,attrvalue);
-        else if(attr[2] == "xattr")
-          l::getxattr_controlfile_errno(config.xattr,attrvalue);
-        else if(attr[2] == "link_cow")
-          l::getxattr_controlfile_bool(config.link_cow,attrvalue);
-        else if(attr[2] == "statfs")
-          l::getxattr_controlfile_statfs(config.statfs,attrvalue);
-        else if(attr[2] == "statfs_ignore")
-          l::getxattr_controlfile_statfsignore(config.statfs_ignore,attrvalue);
-        else if(attr[2] == "policies")
-          l::getxattr_controlfile_policies(config,attrvalue);
-        else if(attr[2] == "version")
-          l::getxattr_controlfile_version(attrvalue);
-        else if(attr[2] == "pid")
-          l::getxattr_controlfile_pid(attrvalue);
-        else if(attr[2] == "direct_io")
-          l::getxattr_controlfile_bool(config.direct_io,attrvalue);
-        else if(attr[2] == "posix_acl")
-          l::getxattr_controlfile_bool(config.posix_acl,attrvalue);
-        else if(attr[2] == "async_read")
-          l::getxattr_controlfile_bool(config.async_read,attrvalue);
-        else if(attr[2] == "fuse_msg_size")
-          l::getxattr_controlfile(config.fuse_msg_size,attrvalue);
-        else if(attr[2] == "readdirplus")
-          l::getxattr_controlfile_bool(config.readdirplus,attrvalue);
-        break;
-
-      case 4:
-        if(attr[2] == "category")
-          l::getxattr_controlfile_category_policy(config,attr[3],attrvalue);
-        else if(attr[2] == "func")
-          l::getxattr_controlfile_fusefunc_policy(config,attr[3],attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "open"))
-          l::getxattr_controlfile_uint64_t(config.open_cache.timeout,attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "statfs"))
-          l::getxattr_controlfile_uint64_t(fs::statvfs_cache_timeout(),attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "attr"))
-          l::getxattr_controlfile_cache_attr(attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "entry"))
-          l::getxattr_controlfile_cache_entry(attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "negative_entry"))
-          l::getxattr_controlfile_cache_negative_entry(attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "symlinks"))
-          l::getxattr_controlfile_bool(config.cache_symlinks,attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "readdir"))
-          l::getxattr_controlfile_bool(config.cache_readdir,attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "files"))
-          l::getxattr_controlfile(config.cache_files,attrvalue);
-        else if((attr[2] == "cache") && (attr[3] == "writeback"))
-          l::getxattr_controlfile_bool(config.writeback_cache,attrvalue);
-        break;
-      }
-
-    if(attrvalue.empty())
-      return -ENOATTR;
+    key = &attrname[14];
+    rv = config.get(key,&val);
+    if(rv < 0)
+      return rv;
 
-    len = attrvalue.size();
+    len = val.size();
 
     if(count == 0)
       return len;
@@ -413,7 +90,7 @@ namespace l
     if(count < len)
       return -ERANGE;
 
-    memcpy(buf,attrvalue.c_str(),len);
+    memcpy(buf,val.c_str(),len);
 
     return (int)len;
   }
@@ -495,16 +172,16 @@ namespace l
   {
     int rv;
     string fullpath;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc(branches_,fusepath,minfreespace,basepaths);
+    rv = searchFunc(branches_,fusepath,minfreespace,&basepaths);
     if(rv == -1)
       return -errno;
 
     fullpath = fs::path::make(basepaths[0],fusepath);
 
-    if(str::isprefix(attrname,"user.mergerfs."))
-      return l::getxattr_user_mergerfs(*basepaths[0],
+    if(str::startswith(attrname,"user.mergerfs."))
+      return l::getxattr_user_mergerfs(basepaths[0],
                                        fusepath,
                                        fullpath,
                                        branches_,
@@ -524,8 +201,7 @@ namespace FUSE
            char       *buf,
            size_t      count)
   {
-    const fuse_context *fc     = fuse_get_context();
-    const Config       &config = Config::get(fc);
+    const Config &config = Config::ro();
 
     if(fusepath == config.controlfile)
       return l::getxattr_controlfile(config,
@@ -537,13 +213,13 @@ namespace FUSE
        l::is_attrname_security_capability(attrname))
       return -ENOATTR;
 
-    if(config.xattr)
-      return -config.xattr;
+    if(config.xattr.to_int())
+      return -config.xattr.to_int();
 
-    const ugid::Set         ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard readlock(&config.branches_lock);
+    const fuse_context *fc = fuse_get_context();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::getxattr(config.getxattr,
+    return l::getxattr(config.func.getxattr.policy,
                        config.branches,
                        config.minfreespace,
                        fusepath,

src/fuse_init.cpp

@@ -50,7 +50,7 @@ namespace l
   void
   want_if_capable(fuse_conn_info *conn_,
                   const int       flag_,
-                  bool           *want_)
+                  ConfigBOOL     *want_)
   {
     if(*want_ && l::capable(conn_,flag_))
       {
@@ -83,24 +83,24 @@ namespace FUSE
   void *
   init(fuse_conn_info *conn_)
   {
-    Config &c = Config::get_writable();
+    Config &config = Config::rw();
 
     ugid::init();
 
     l::want_if_capable(conn_,FUSE_CAP_ASYNC_DIO);
-    l::want_if_capable(conn_,FUSE_CAP_ASYNC_READ,&c.async_read);
+    l::want_if_capable(conn_,FUSE_CAP_ASYNC_READ,&config.async_read);
     l::want_if_capable(conn_,FUSE_CAP_ATOMIC_O_TRUNC);
     l::want_if_capable(conn_,FUSE_CAP_BIG_WRITES);
-    l::want_if_capable(conn_,FUSE_CAP_CACHE_SYMLINKS,&c.cache_symlinks);
+    l::want_if_capable(conn_,FUSE_CAP_CACHE_SYMLINKS,&config.cache_symlinks);
     l::want_if_capable(conn_,FUSE_CAP_DONT_MASK);
     l::want_if_capable(conn_,FUSE_CAP_IOCTL_DIR);
     l::want_if_capable(conn_,FUSE_CAP_PARALLEL_DIROPS);
-    l::want_if_capable(conn_,FUSE_CAP_READDIR_PLUS,&c.readdirplus);
+    l::want_if_capable(conn_,FUSE_CAP_READDIR_PLUS,&config.readdirplus);
     //l::want_if_capable(conn_,FUSE_CAP_READDIR_PLUS_AUTO);
-    l::want_if_capable(conn_,FUSE_CAP_POSIX_ACL,&c.posix_acl);
-    l::want_if_capable(conn_,FUSE_CAP_WRITEBACK_CACHE,&c.writeback_cache);
-    l::want_if_capable_max_pages(conn_,c);
+    l::want_if_capable(conn_,FUSE_CAP_POSIX_ACL,&config.posix_acl);
+    l::want_if_capable(conn_,FUSE_CAP_WRITEBACK_CACHE,&config.writeback_cache);
+    l::want_if_capable_max_pages(conn_,config);
 
-    return &c;
+    return &config;
   }
 }

src/fuse_ioctl.cpp

@@ -23,7 +23,7 @@
 #include "fs_base_ioctl.hpp"
 #include "fs_base_open.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
+#include "str.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -32,10 +32,23 @@
 #include <vector>
 
 #include <fcntl.h>
+#include <string.h>
 
 using std::string;
 using std::vector;
 
+typedef char IOCTL_BUF[4096];
+#define IOCTL_APP_TYPE 0xDF
+//#define IOCTL_READ_KEYS 0xD000DF00
+//#define IOCTL_READ_VAL  0xD000DF01
+//#define IOCTL_WRITE_VAL 0x5000DF02
+//#define IOCTL_FILE_INFO 0xD000DF03
+#define IOCTL_READ_KEYS _IOWR(IOCTL_APP_TYPE,0,IOCTL_BUF)
+#define IOCTL_READ_VAL  _IOWR(IOCTL_APP_TYPE,1,IOCTL_BUF)
+#define IOCTL_WRITE_VAL _IOW(IOCTL_APP_TYPE,2,IOCTL_BUF)
+#define IOCTL_FILE_INFO _IOWR(IOCTL_APP_TYPE,3,IOCTL_BUF)
+
+
 #ifndef FS_IOC_GETFLAGS
 # define FS_IOC_GETFLAGS _IOR('f',1,long)
 #endif
@@ -69,7 +82,7 @@ using std::vector;
   is not possible to safely handle the situation.
 
   https://lwn.net/Articles/575846/
- */
+*/
 
 namespace l
 {
@@ -107,8 +120,8 @@ namespace l
              void           *data_,
              uint32_t       *out_bufsz_)
   {
-    FileInfo           *fi     = reinterpret_cast<FileInfo*>(ffi_->fh);
-    const fuse_context *fc     = fuse_get_context();
+    FileInfo           *fi = reinterpret_cast<FileInfo*>(ffi_->fh);
+    const fuse_context *fc = fuse_get_context();
     const ugid::Set     ugid(fc->uid,fc->gid);
 
     return l::ioctl(fi->fd,cmd_,data_,out_bufsz_);
@@ -131,16 +144,15 @@ namespace l
     int fd;
     int rv;
     string fullpath;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
     fullpath = fs::path::make(basepaths[0],fusepath_);
 
-    const int flags = O_RDONLY | O_NOATIME | O_NONBLOCK;
-    fd = fs::open(fullpath,flags);
+    fd = fs::open(fullpath,O_RDONLY|O_NOATIME|O_NONBLOCK);
     if(fd == -1)
       return -errno;
 
@@ -158,13 +170,12 @@ namespace l
             void           *data_,
             uint32_t       *out_bufsz_)
   {
-    DirInfo                 *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    DirInfo            *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::ioctl_dir_base(config.open,
+    return l::ioctl_dir_base(config.func.open.policy,
                              config.branches,
                              config.minfreespace,
                              di->fusepath.c_str(),
@@ -172,19 +183,217 @@ namespace l
                              data_,
                              out_bufsz_);
   }
+
+  static
+  int
+  strcpy(const std::string &s_,
+         void              *data_)
+  {
+    char *data = (char*)data_;
+
+    if(s_.size() >= (sizeof(IOCTL_BUF) - 1))
+      return -ERANGE;
+
+    memcpy(data,s_.c_str(),s_.size());
+    data[s_.size()] = '\0';
+
+    return s_.size();
+  }
+
+  static
+  int
+  read_keys(void *data_)
+  {
+    std::string   keys;
+    const Config &config = Config::ro();
+
+    config.keys(keys);
+
+    return l::strcpy(keys,data_);
+  }
+
+  static
+  int
+  read_val(void *data_)
+  {
+    int rv;
+    char *data;
+    std::string key;
+    std::string val;
+    const Config &config = Config::ro();
+
+    data = (char*)data_;
+    data[sizeof(IOCTL_BUF) - 1] = '\0';
+
+    key = data;
+    rv = config.get(key,&val);
+    if(rv < 0)
+      return rv;
+
+    return l::strcpy(val,data_);
+  }
+
+  static
+  int
+  write_val(void *data_)
+  {
+    char *data;
+    std::string kv;
+    std::string key;
+    std::string val;
+    Config &config = Config::rw();
+
+    data = (char*)data_;
+    data[sizeof(IOCTL_BUF) - 1] = '\0';
+
+    kv = data;
+    str::splitkv(kv,'=',&key,&val);
+
+    return config.set(key,val);
+  }
+
+  static
+  int
+  file_basepath(Policy::Func::Search  searchFunc_,
+                const Branches       &branches_,
+                const uint64_t        minfreespace_,
+                const char           *fusepath_,
+                void                 *data_)
+  {
+    int rv;
+    vector<string> basepaths;
+
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
+    if(rv == -1)
+      return -errno;
+
+    return l::strcpy(basepaths[0],data_);
+  }
+
+  static
+  int
+  file_basepath(fuse_file_info *ffi_,
+                void           *data_)
+  {
+    const Config &config   = Config::ro();
+    std::string  &fusepath = reinterpret_cast<FH*>(ffi_->fh)->fusepath;
+
+    return l::file_basepath(config.func.open.policy,
+                            config.branches,
+                            config.minfreespace,
+                            fusepath.c_str(),
+                            data_);
+  }
+
+  static
+  int
+  file_relpath(fuse_file_info *ffi_,
+               void           *data_)
+  {
+    std::string &fusepath = reinterpret_cast<FH*>(ffi_->fh)->fusepath;
+
+    return l::strcpy(fusepath,data_);
+  }
+
+  static
+  int
+  file_fullpath(Policy::Func::Search  searchFunc_,
+                const Branches       &branches_,
+                const uint64_t        minfreespace_,
+                const string         &fusepath_,
+                void                 *data_)
+  {
+    int rv;
+    string fullpath;
+    vector<string> basepaths;
+
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
+    if(rv == -1)
+      return -errno;
+
+    fullpath = fs::path::make(basepaths[0],fusepath_);
+
+    return l::strcpy(fullpath,data_);
+  }
+
+  static
+  int
+  file_fullpath(fuse_file_info *ffi_,
+                void           *data_)
+  {
+    const Config &config   = Config::ro();
+    std::string  &fusepath = reinterpret_cast<FH*>(ffi_->fh)->fusepath;
+
+    return l::file_fullpath(config.func.open.policy,
+                            config.branches,
+                            config.minfreespace,
+                            fusepath,
+                            data_);
+  }
+
+  static
+  int
+  file_allpaths(fuse_file_info *ffi_,
+                void           *data_)
+  {
+    string concated;
+    vector<string> paths;
+    vector<string> branches;
+    string &fusepath = reinterpret_cast<FH*>(ffi_->fh)->fusepath;
+    const Config &config = Config::ro();
+
+    config.branches.to_paths(branches);
+
+    fs::findallfiles(branches,fusepath.c_str(),paths);
+
+    concated = str::join(paths,'\0');
+
+    return l::strcpy(concated,data_);
+  }
+
+  static
+  int
+  file_info(fuse_file_info *ffi_,
+            void           *data_)
+  {
+    char *key = (char*)data_;
+
+    if(!strcmp("basepath",key))
+      return l::file_basepath(ffi_,data_);
+    if(!strcmp("relpath",key))
+      return l::file_relpath(ffi_,data_);
+    if(!strcmp("fullpath",key))
+      return l::file_fullpath(ffi_,data_);
+    if(!strcmp("allpaths",key))
+      return l::file_allpaths(ffi_,data_);
+
+    return -ENOATTR;
+  }
 }
 
 namespace FUSE
 {
   int
   ioctl(const char     *fusepath_,
-        int             cmd_,
+        unsigned long   cmd_,
         void           *arg_,
         fuse_file_info *ffi_,
         unsigned int    flags_,
         void           *data_,
         uint32_t       *out_bufsz_)
   {
+    switch(cmd_)
+      {
+      case IOCTL_READ_KEYS:
+        return l::read_keys(data_);
+      case IOCTL_READ_VAL:
+        return l::read_val(data_);
+      case IOCTL_WRITE_VAL:
+        return l::write_val(data_);
+      case IOCTL_FILE_INFO:
+        return l::file_info(ffi_,data_);
+      }
+
     if(flags_ & FUSE_IOCTL_DIR)
       return l::ioctl_dir(ffi_,cmd_,data_,out_bufsz_);
 

src/fuse_ioctl.hpp

@@ -22,7 +22,7 @@ namespace FUSE
 {
   int
   ioctl(const char     *fusepath_,
-        int             cmd_,
+        unsigned long   cmd_,
         void           *arg_,
         fuse_file_info *ffi_,
         unsigned int    flags_,

src/fuse_link.cpp

@@ -20,7 +20,6 @@
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -55,11 +54,11 @@ namespace l
 
   static
   int
-  link_create_path_loop(const vector<const string*> &oldbasepaths_,
-                        const string                &newbasepath_,
-                        const char                  *oldfusepath_,
-                        const char                  *newfusepath_,
-                        const string                &newfusedirpath_)
+  link_create_path_loop(const vector<string> &oldbasepaths_,
+                        const string         &newbasepath_,
+                        const char           *oldfusepath_,
+                        const char           *newfusepath_,
+                        const string         &newfusedirpath_)
   {
     int rv;
     int error;
@@ -67,11 +66,11 @@ namespace l
     error = -1;
     for(size_t i = 0, ei = oldbasepaths_.size(); i != ei; i++)
       {
-        rv = fs::clonepath_as_root(newbasepath_,*oldbasepaths_[i],newfusedirpath_);
+        rv = fs::clonepath_as_root(newbasepath_,oldbasepaths_[i],newfusedirpath_);
         if(rv == -1)
           error = error::calc(rv,error,errno);
         else
-          error = l::link_create_path_core(*oldbasepaths_[i],newbasepath_,
+          error = l::link_create_path_core(oldbasepaths_[i],newbasepath_,
                                            oldfusepath_,newfusepath_,
                                            error);
       }
@@ -90,20 +89,20 @@ namespace l
   {
     int rv;
     string newfusedirpath;
-    vector<const string*> oldbasepaths;
-    vector<const string*> newbasepaths;
+    vector<string> oldbasepaths;
+    vector<string> newbasepaths;
 
-    rv = actionFunc_(branches_,oldfusepath_,minfreespace_,oldbasepaths);
+    rv = actionFunc_(branches_,oldfusepath_,minfreespace_,&oldbasepaths);
     if(rv == -1)
       return -errno;
 
     newfusedirpath = fs::path::dirname(newfusepath_);
 
-    rv = searchFunc_(branches_,newfusedirpath,minfreespace_,newbasepaths);
+    rv = searchFunc_(branches_,newfusedirpath,minfreespace_,&newbasepaths);
     if(rv == -1)
       return -errno;
 
-    return l::link_create_path_loop(oldbasepaths,*newbasepaths[0],
+    return l::link_create_path_loop(oldbasepaths,newbasepaths[0],
                                     oldfusepath_,newfusepath_,
                                     newfusedirpath);
   }
@@ -120,22 +119,22 @@ namespace l
   {
     int rv;
     string newfusedirpath;
-    vector<const string*> newbasepath;
+    vector<string> newbasepath;
 
     newfusedirpath = fs::path::dirname(newfusepath_);
 
-    rv = createFunc_(branches_,newfusedirpath,minfreespace_,newbasepath);
+    rv = createFunc_(branches_,newfusedirpath,minfreespace_,&newbasepath);
     if(rv == -1)
       return -1;
 
-    if(oldbasepath_ != *newbasepath[0])
+    if(oldbasepath_ != newbasepath[0])
       return (errno=EXDEV,-1);
 
-    rv = searchFunc_(branches_,newfusedirpath,minfreespace_,newbasepath);
+    rv = searchFunc_(branches_,newfusedirpath,minfreespace_,&newbasepath);
     if(rv == -1)
       return -1;
 
-    return fs::clonepath_as_root(*newbasepath[0],oldbasepath_,newfusedirpath);
+    return fs::clonepath_as_root(newbasepath[0],oldbasepath_,newfusedirpath);
   }
 
   static
@@ -172,13 +171,13 @@ namespace l
 
   static
   int
-  link_preserve_path_loop(Policy::Func::Search         searchFunc_,
-                          Policy::Func::Create         createFunc_,
-                          const Branches              &branches_,
-                          const uint64_t               minfreespace_,
-                          const char                  *oldfusepath_,
-                          const char                  *newfusepath_,
-                          const vector<const string*> &oldbasepaths_)
+  link_preserve_path_loop(Policy::Func::Search  searchFunc_,
+                          Policy::Func::Create  createFunc_,
+                          const Branches       &branches_,
+                          const uint64_t        minfreespace_,
+                          const char           *oldfusepath_,
+                          const char           *newfusepath_,
+                          const vector<string> &oldbasepaths_)
   {
     int error;
 
@@ -187,7 +186,7 @@ namespace l
       {
         error = l::link_preserve_path_core(searchFunc_,createFunc_,
                                            branches_,minfreespace_,
-                                           *oldbasepaths_[i],
+                                           oldbasepaths_[i],
                                            oldfusepath_,newfusepath_,
                                            error);
       }
@@ -206,9 +205,9 @@ namespace l
                      const char           *newfusepath_)
   {
     int rv;
-    vector<const string*> oldbasepaths;
+    vector<string> oldbasepaths;
 
-    rv = actionFunc_(branches_,oldfusepath_,minfreespace_,oldbasepaths);
+    rv = actionFunc_(branches_,oldfusepath_,minfreespace_,&oldbasepaths);
     if(rv == -1)
       return -errno;
 
@@ -225,22 +224,21 @@ namespace FUSE
   link(const char *from_,
        const char *to_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
-
-    if(config.create->path_preserving() && !config.ignorepponrename)
-      return l::link_preserve_path(config.getattr,
-                                   config.link,
-                                   config.create,
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
+
+    if(config.func.create.policy->path_preserving() && !config.ignorepponrename)
+      return l::link_preserve_path(config.func.getattr.policy,
+                                   config.func.link.policy,
+                                   config.func.create.policy,
                                    config.branches,
                                    config.minfreespace,
                                    from_,
                                    to_);
 
-    return l::link_create_path(config.link,
-                               config.create,
+    return l::link_create_path(config.func.link.policy,
+                               config.func.create.policy,
                                config.branches,
                                config.minfreespace,
                                from_,

src/fuse_listxattr.cpp

@@ -20,7 +20,6 @@
 #include "errno.hpp"
 #include "fs_base_listxattr.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 #include "xattr.hpp"
 
@@ -38,53 +37,13 @@ namespace l
 {
   static
   int
-  listxattr_controlfile(char         *list_,
+  listxattr_controlfile(const Config &config_,
+                        char         *list_,
                         const size_t  size_)
   {
     string xattrs;
-    const vector<string> strs =
-      buildvector<string>
-      ("user.mergerfs.async_read")
-      ("user.mergerfs.branches")
-      ("user.mergerfs.cache.attr")
-      ("user.mergerfs.cache.entry")
-      ("user.mergerfs.cache.files")
-      ("user.mergerfs.cache.negative_entry")
-      ("user.mergerfs.cache.open")
-      ("user.mergerfs.cache.readdir")
-      ("user.mergerfs.cache.statfs")
-      ("user.mergerfs.cache.symlinks")
-      ("user.mergerfs.cache.writeback")
-      ("user.mergerfs.direct_io")
-      ("user.mergerfs.dropcacheonclose")
-      ("user.mergerfs.fuse_msg_size")
-      ("user.mergerfs.ignorepponrename")
-      ("user.mergerfs.link_cow")
-      ("user.mergerfs.minfreespace")
-      ("user.mergerfs.moveonenospc")
-      ("user.mergerfs.nullrw")
-      ("user.mergerfs.pid")
-      ("user.mergerfs.policies")
-      ("user.mergerfs.posix_acl")
-      ("user.mergerfs.readdirplus")
-      ("user.mergerfs.security_capability")
-      ("user.mergerfs.srcmounts")
-      ("user.mergerfs.statfs")
-      ("user.mergerfs.statfs_ignore")
-      ("user.mergerfs.symlinkify")
-      ("user.mergerfs.symlinkify_timeout")
-      ("user.mergerfs.version")
-      ("user.mergerfs.xattr")
-      ;
-
-    xattrs.reserve(1024);
-    for(size_t i = 0; i < strs.size(); i++)
-      xattrs += (strs[i] + '\0');
-    for(size_t i = Category::Enum::BEGIN; i < Category::Enum::END; i++)
-      xattrs += ("user.mergerfs.category." + (std::string)*Category::categories[i] + '\0');
-    for(size_t i = FuseFunc::Enum::BEGIN; i < FuseFunc::Enum::END; i++)
-      xattrs += ("user.mergerfs.func." + (std::string)*FuseFunc::fusefuncs[i] + '\0');
 
+    config_.keys_xattr(xattrs);
     if(size_ == 0)
       return xattrs.size();
 
@@ -107,9 +66,9 @@ namespace l
   {
     int rv;
     string fullpath;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -128,26 +87,25 @@ namespace FUSE
             char       *list_,
             size_t      size_)
   {
-    const fuse_context *fc     = fuse_get_context();
-    const Config       &config = Config::get(fc);
+    const Config &config = Config::ro();
 
     if(fusepath_ == config.controlfile)
-      return l::listxattr_controlfile(list_,size_);
+      return l::listxattr_controlfile(config,list_,size_);
 
     switch(config.xattr)
       {
-      case 0:
+      case Config::XAttr::ENUM::PASSTHROUGH:
         break;
-      case ENOATTR:
+      case Config::XAttr::ENUM::NOATTR:
         return 0;
-      default:
-        return -config.xattr;
+      case Config::XAttr::ENUM::NOSYS:
+        return -ENOSYS;
       }
 
-    const ugid::Set         ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard readlock(&config.branches_lock);
+    const fuse_context *fc = fuse_get_context();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::listxattr(config.listxattr,
+    return l::listxattr(config.func.listxattr.policy,
                         config.branches,
                         config.minfreespace,
                         fusepath_,

src/fuse_mkdir.cpp

@@ -14,11 +14,6 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <fuse.h>
-
-#include <string>
-#include <vector>
-
 #include "config.hpp"
 #include "errno.hpp"
 #include "fs_acl.hpp"
@@ -26,9 +21,13 @@
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
+#include <fuse.h>
+
+#include <string>
+#include <vector>
+
 using std::string;
 using std::vector;
 
@@ -66,12 +65,12 @@ namespace l
 
   static
   int
-  mkdir_loop(const string                &existingpath_,
-             const vector<const string*> &createpaths_,
-             const char                  *fusepath_,
-             const string                &fusedirpath_,
-             const mode_t                 mode_,
-             const mode_t                 umask_)
+  mkdir_loop(const string         &existingpath_,
+             const vector<string> &createpaths_,
+             const char           *fusepath_,
+             const string         &fusedirpath_,
+             const mode_t          mode_,
+             const mode_t          umask_)
   {
     int rv;
     int error;
@@ -79,11 +78,11 @@ namespace l
     error = -1;
     for(size_t i = 0, ei = createpaths_.size(); i != ei; i++)
       {
-        rv = fs::clonepath_as_root(existingpath_,*createpaths_[i],fusedirpath_);
+        rv = fs::clonepath_as_root(existingpath_,createpaths_[i],fusedirpath_);
         if(rv == -1)
           error = error::calc(rv,error,errno);
         else
-          error = l::mkdir_loop_core(*createpaths_[i],
+          error = l::mkdir_loop_core(createpaths_[i],
                                      fusepath_,
                                      mode_,
                                      umask_,
@@ -105,20 +104,20 @@ namespace l
   {
     int rv;
     string fusedirpath;
-    vector<const string*> createpaths;
-    vector<const string*> existingpaths;
+    vector<string> createpaths;
+    vector<string> existingpaths;
 
     fusedirpath = fs::path::dirname(fusepath_);
 
-    rv = searchFunc_(branches_,fusedirpath,minfreespace_,existingpaths);
+    rv = searchFunc_(branches_,fusedirpath,minfreespace_,&existingpaths);
     if(rv == -1)
       return -errno;
 
-    rv = createFunc_(branches_,fusedirpath,minfreespace_,createpaths);
+    rv = createFunc_(branches_,fusedirpath,minfreespace_,&createpaths);
     if(rv == -1)
       return -errno;
 
-    return l::mkdir_loop(*existingpaths[0],
+    return l::mkdir_loop(existingpaths[0],
                          createpaths,
                          fusepath_,
                          fusedirpath,
@@ -133,13 +132,12 @@ namespace FUSE
   mkdir(const char *fusepath_,
         mode_t      mode_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::mkdir(config.getattr,
-                    config.mkdir,
+    return l::mkdir(config.func.getattr.policy,
+                    config.func.mkdir.policy,
                     config.branches,
                     config.minfreespace,
                     fusepath_,

src/fuse_mknod.cpp

@@ -21,7 +21,6 @@
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -69,13 +68,13 @@ namespace l
 
   static
   int
-  mknod_loop(const string                &existingpath_,
-             const vector<const string*> &createpaths_,
-             const char                  *fusepath_,
-             const string                &fusedirpath_,
-             const mode_t                 mode_,
-             const mode_t                 umask_,
-             const dev_t                  dev_)
+  mknod_loop(const string         &existingpath_,
+             const vector<string> &createpaths_,
+             const char           *fusepath_,
+             const string         &fusedirpath_,
+             const mode_t          mode_,
+             const mode_t          umask_,
+             const dev_t           dev_)
   {
     int rv;
     int error;
@@ -83,11 +82,11 @@ namespace l
     error = -1;
     for(size_t i = 0, ei = createpaths_.size(); i != ei; i++)
       {
-        rv = fs::clonepath_as_root(existingpath_,*createpaths_[i],fusedirpath_);
+        rv = fs::clonepath_as_root(existingpath_,createpaths_[i],fusedirpath_);
         if(rv == -1)
           error = error::calc(rv,error,errno);
         else
-          error = l::mknod_loop_core(*createpaths_[i],
+          error = l::mknod_loop_core(createpaths_[i],
                                      fusepath_,
                                      mode_,umask_,dev_,error);
       }
@@ -108,20 +107,20 @@ namespace l
   {
     int rv;
     string fusedirpath;
-    vector<const string*> createpaths;
-    vector<const string*> existingpaths;
+    vector<string> createpaths;
+    vector<string> existingpaths;
 
     fusedirpath = fs::path::dirname(fusepath_);
 
-    rv = searchFunc_(branches_,fusedirpath,minfreespace_,existingpaths);
+    rv = searchFunc_(branches_,fusedirpath,minfreespace_,&existingpaths);
     if(rv == -1)
       return -errno;
 
-    rv = createFunc_(branches_,fusedirpath,minfreespace_,createpaths);
+    rv = createFunc_(branches_,fusedirpath,minfreespace_,&createpaths);
     if(rv == -1)
       return -errno;
 
-    return l::mknod_loop(*existingpaths[0],createpaths,
+    return l::mknod_loop(existingpaths[0],createpaths,
                          fusepath_,fusedirpath,
                          mode_,umask_,dev_);
   }
@@ -134,13 +133,12 @@ namespace FUSE
         mode_t      mode_,
         dev_t       rdev_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::mknod(config.getattr,
-                    config.mknod,
+    return l::mknod(config.func.getattr.policy,
+                    config.func.mknod.policy,
                     config.branches,
                     config.minfreespace,
                     fusepath_,

src/fuse_open.cpp

@@ -21,7 +21,6 @@
 #include "fs_cow.hpp"
 #include "fs_path.hpp"
 #include "policy_cache.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -61,27 +60,27 @@ namespace l
   {
     switch(config_.cache_files)
       {
-      case CacheFiles::LIBFUSE:
+      case CacheFiles::ENUM::LIBFUSE:
         ffi_->direct_io  = config_.direct_io;
         ffi_->keep_cache = config_.kernel_cache;
         ffi_->auto_cache = config_.auto_cache;
         break;
-      case CacheFiles::OFF:
+      case CacheFiles::ENUM::OFF:
         ffi_->direct_io  = 1;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::PARTIAL:
+      case CacheFiles::ENUM::PARTIAL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::FULL:
+      case CacheFiles::ENUM::FULL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 1;
         ffi_->auto_cache = 0;
         break;
-      case CacheFiles::AUTO_FULL:
+      case CacheFiles::ENUM::AUTO_FULL:
         ffi_->direct_io  = 0;
         ffi_->keep_cache = 0;
         ffi_->auto_cache = 1;
@@ -142,17 +141,16 @@ namespace FUSE
   open(const char     *fusepath_,
        fuse_file_info *ffi_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
     l::config_to_ffi_flags(config,ffi_);
 
     if(config.writeback_cache)
       l::tweak_flags_writeback_cache(&ffi_->flags);
 
-    return l::open(config.open,
+    return l::open(config.func.open.policy,
                    config.open_cache,
                    config.branches,
                    config.minfreespace,

src/fuse_opendir.cpp

@@ -25,7 +25,7 @@ namespace FUSE
   opendir(const char     *fusepath_,
           fuse_file_info *ffi_)
   {
-    const Config &config = Config::get();
+    const Config &config = Config::ro();
 
     ffi_->fh = reinterpret_cast<uint64_t>(new DirInfo(fusepath_));
 

src/fuse_readdir_linux.icpp

@@ -140,9 +140,9 @@ namespace FUSE
   {
     DirInfo                 *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
     const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
+    const Config            &config = Config::ro();
     const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const rwlock::ReadGuard  readlock(&config.branches.lock);
 
     return l::readdir(config.branches,
                       di->fusepath.c_str(),

src/fuse_readdir_plus_linux.icpp

@@ -69,6 +69,8 @@ namespace l
   int
   readdir_plus(const Branches &branches_,
                const char     *dirname_,
+               const uint64_t  entry_timeout_,
+               const uint64_t  attr_timeout_,
                fuse_dirents_t *buf_)
   {
     int rv;
@@ -85,8 +87,8 @@ namespace l
 
     entry.nodeid           = 0;
     entry.generation       = 0;
-    entry.entry_valid      = 1;
-    entry.attr_valid       = 1;
+    entry.entry_valid      = entry_timeout_;
+    entry.attr_valid       = attr_timeout_;
     entry.entry_valid_nsec = 0;
     entry.attr_valid_nsec  = 0;
     for(size_t i = 0, ei = branches_.size(); i != ei; i++)
@@ -151,12 +153,14 @@ namespace FUSE
   {
     DirInfo                 *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
     const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
+    const Config            &config = Config::ro();
     const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const rwlock::ReadGuard  guard(&config.branches.lock);
 
     return l::readdir_plus(config.branches,
                            di->fusepath.c_str(),
+                           config.cache_entry,
+                           config.cache_attr,
                            buf_);
   }
 }

src/fuse_readdir_plus_posix.icpp

@@ -137,9 +137,9 @@ namespace FUSE
   {
     DirInfo                 *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
     const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
+    const Config            &config = Config::ro();
     const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const rwlock::ReadGuard  guard(&config.branches.lock);
 
     return l::readdir_plus(config.branches,
                            di->fusepath.c_str(),

src/fuse_readdir_posix.icpp

@@ -123,9 +123,9 @@ namespace FUSE
   {
     DirInfo                 *di     = reinterpret_cast<DirInfo*>(ffi_->fh);
     const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
+    const Config            &config = Config::ro();
     const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const rwlock::ReadGuard  guard(&config.branches.lock);
 
     return l::readdir(config.branches,
                       di->fusepath.c_str(),

src/fuse_readlink.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_readlink.hpp"
 #include "fs_base_stat.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "symlinkify.hpp"
 #include "ugid.hpp"
 
@@ -74,7 +73,7 @@ namespace l
 
   static
   int
-  readlink_core(const string *basepath_,
+  readlink_core(const string &basepath_,
                 const char   *fusepath_,
                 char         *buf_,
                 const size_t  size_,
@@ -103,9 +102,9 @@ namespace l
            const time_t          symlinkify_timeout_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = searchFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = searchFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -121,12 +120,11 @@ namespace FUSE
            char       *buf_,
            size_t      size_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::readlink(config.readlink,
+    return l::readlink(config.func.readlink.policy,
                        config.branches,
                        config.minfreespace,
                        fusepath_,

src/fuse_release.cpp

@@ -53,8 +53,8 @@ namespace FUSE
   release(const char     *fusepath_,
           fuse_file_info *ffi_)
   {
-    const Config &config = Config::get();
-    FileInfo     *fi     = reinterpret_cast<FileInfo*>(ffi_->fh);
+    const Config &config = Config::ro();
+    FileInfo *fi = reinterpret_cast<FileInfo*>(ffi_->fh);
 
     if(config.open_cache.timeout)
       config.open_cache.cleanup(10);

src/fuse_removexattr.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_removexattr.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -34,7 +33,7 @@ namespace l
 {
   static
   int
-  removexattr_loop_core(const string *basepath_,
+  removexattr_loop_core(const string &basepath_,
                         const char   *fusepath_,
                         const char   *attrname_,
                         const int     error_)
@@ -51,9 +50,9 @@ namespace l
 
   static
   int
-  removexattr_loop(const vector<const string*> &basepaths_,
-                   const char                  *fusepath_,
-                   const char                  *attrname_)
+  removexattr_loop(const vector<string> &basepaths_,
+                   const char           *fusepath_,
+                   const char           *attrname_)
   {
     int error;
 
@@ -76,9 +75,9 @@ namespace l
               const char           *attrname_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -92,18 +91,17 @@ namespace FUSE
   removexattr(const char *fusepath_,
               const char *attrname_)
   {
-    const fuse_context *fc     = fuse_get_context();
-    const Config       &config = Config::get(fc);
+    const Config &config = Config::ro();
 
     if(fusepath_ == config.controlfile)
       return -ENOATTR;
-    if(config.xattr)
-      return -config.xattr;
+    if(config.xattr.to_int())
+      return -config.xattr.to_int();
 
-    const ugid::Set         ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard readlock(&config.branches_lock);
+    const fuse_context *fc = fuse_get_context();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::removexattr(config.removexattr,
+    return l::removexattr(config.func.removexattr.policy,
                           config.branches,
                           config.minfreespace,
                           fusepath_,

src/fuse_rename.cpp

@@ -14,11 +14,6 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <algorithm>
-#include <set>
-#include <string>
-#include <vector>
-
 #include "config.hpp"
 #include "errno.hpp"
 #include "fs_base_remove.hpp"
@@ -26,21 +21,25 @@
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
+#include <algorithm>
+#include <set>
+#include <string>
+#include <vector>
+
 using std::string;
 using std::vector;
 using std::set;
 
 static
 bool
-member(const vector<const string*> &haystack,
-       const string                &needle)
+member(const vector<string> &haystack,
+       const string         &needle)
 {
   for(size_t i = 0, ei = haystack.size(); i != ei; i++)
     {
-      if(*haystack[i] == needle)
+      if(haystack[i] == needle)
         return true;
     }
 
@@ -57,14 +56,14 @@ _remove(const vector<string> &toremove)
 
 static
 void
-_rename_create_path_core(const vector<const string*> &oldbasepaths,
-                         const string                &oldbasepath,
-                         const string                &newbasepath,
-                         const char                  *oldfusepath,
-                         const char                  *newfusepath,
-                         const string                &newfusedirpath,
-                         int                         &error,
-                         vector<string>              &tounlink)
+_rename_create_path_core(const vector<string> &oldbasepaths,
+                         const string         &oldbasepath,
+                         const string         &newbasepath,
+                         const char           *oldfusepath,
+                         const char           *newfusepath,
+                         const string         &newfusedirpath,
+                         int                  &error,
+                         vector<string>       &tounlink)
 {
   int rv;
   bool ismember;
@@ -108,26 +107,29 @@ _rename_create_path(Policy::Func::Search  searchFunc,
   int error;
   string newfusedirpath;
   vector<string> toremove;
-  vector<const string*> newbasepath;
-  vector<const string*> oldbasepaths;
+  vector<string> newbasepath;
+  vector<string> oldbasepaths;
+  vector<string> branches;
 
-  rv = actionFunc(branches_,oldfusepath,minfreespace,oldbasepaths);
+  rv = actionFunc(branches_,oldfusepath,minfreespace,&oldbasepaths);
   if(rv == -1)
     return -errno;
 
   newfusedirpath = fs::path::dirname(newfusepath);
 
-  rv = searchFunc(branches_,newfusedirpath,minfreespace,newbasepath);
+  rv = searchFunc(branches_,newfusedirpath,minfreespace,&newbasepath);
   if(rv == -1)
     return -errno;
 
+  branches_.to_paths(branches);
+
   error = -1;
-  for(size_t i = 0, ei = branches_.size(); i != ei; i++)
+  for(size_t i = 0, ei = branches.size(); i != ei; i++)
     {
-      const string &oldbasepath = branches_[i].path;
+      const string &oldbasepath = branches[i];
 
       _rename_create_path_core(oldbasepaths,
-                               oldbasepath,*newbasepath[0],
+                               oldbasepath,newbasepath[0],
                                oldfusepath,newfusepath,
                                newfusedirpath,
                                error,toremove);
@@ -149,13 +151,13 @@ _clonepath(Policy::Func::Search  searchFunc,
            const string         &fusedirpath)
 {
   int rv;
-  vector<const string*> srcbasepath;
+  vector<string> srcbasepath;
 
-  rv = searchFunc(branches_,fusedirpath,minfreespace,srcbasepath);
+  rv = searchFunc(branches_,fusedirpath,minfreespace,&srcbasepath);
   if(rv == -1)
     return -errno;
 
-  fs::clonepath_as_root(*srcbasepath[0],dstbasepath,fusedirpath);
+  fs::clonepath_as_root(srcbasepath[0],dstbasepath,fusedirpath);
 
   return 0;
 }
@@ -172,15 +174,15 @@ _clonepath_if_would_create(Policy::Func::Search  searchFunc,
 {
   int rv;
   string newfusedirpath;
-  vector<const string*> newbasepath;
+  vector<string> newbasepath;
 
   newfusedirpath = fs::path::dirname(newfusepath);
 
-  rv = createFunc(branches_,newfusedirpath,minfreespace,newbasepath);
+  rv = createFunc(branches_,newfusedirpath,minfreespace,&newbasepath);
   if(rv == -1)
     return rv;
 
-  if(oldbasepath == *newbasepath[0])
+  if(oldbasepath == newbasepath[0])
     return _clonepath(searchFunc,branches_,minfreespace,oldbasepath,newfusedirpath);
 
   return (errno=EXDEV,-1);
@@ -188,16 +190,16 @@ _clonepath_if_would_create(Policy::Func::Search  searchFunc,
 
 static
 void
-_rename_preserve_path_core(Policy::Func::Search         searchFunc,
-                           Policy::Func::Create         createFunc,
-                           const Branches              &branches_,
-                           const uint64_t               minfreespace,
-                           const vector<const string*> &oldbasepaths,
-                           const string                &oldbasepath,
-                           const char                  *oldfusepath,
-                           const char                  *newfusepath,
-                           int                         &error,
-                           vector<string>              &toremove)
+_rename_preserve_path_core(Policy::Func::Search  searchFunc,
+                           Policy::Func::Create  createFunc,
+                           const Branches       &branches_,
+                           const uint64_t        minfreespace,
+                           const vector<string> &oldbasepaths,
+                           const string         &oldbasepath,
+                           const char           *oldfusepath,
+                           const char           *newfusepath,
+                           int                  &error,
+                           vector<string>       &toremove)
 {
   int rv;
   bool ismember;
@@ -245,16 +247,19 @@ _rename_preserve_path(Policy::Func::Search  searchFunc,
   int rv;
   int error;
   vector<string> toremove;
-  vector<const string*> oldbasepaths;
+  vector<string> oldbasepaths;
+  vector<string> branches;
 
-  rv = actionFunc(branches_,oldfusepath,minfreespace,oldbasepaths);
+  rv = actionFunc(branches_,oldfusepath,minfreespace,&oldbasepaths);
   if(rv == -1)
     return -errno;
 
+  branches_.to_paths(branches);
+
   error = -1;
-  for(size_t i = 0, ei = branches_.size(); i != ei; i++)
+  for(size_t i = 0, ei = branches.size(); i != ei; i++)
     {
-      const string &oldbasepath = branches_[i].path;
+      const string &oldbasepath = branches[i];
 
       _rename_preserve_path_core(searchFunc,createFunc,
                                  branches_,minfreespace,
@@ -275,24 +280,23 @@ namespace FUSE
   rename(const char *oldpath,
          const char *newpath)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    Config             &config = Config::rw();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
     config.open_cache.erase(oldpath);
 
-    if(config.create->path_preserving() && !config.ignorepponrename)
-      return _rename_preserve_path(config.getattr,
-                                   config.rename,
-                                   config.create,
+    if(config.func.create.policy->path_preserving() && !config.ignorepponrename)
+      return _rename_preserve_path(config.func.getattr.policy,
+                                   config.func.rename.policy,
+                                   config.func.create.policy,
                                    config.branches,
                                    config.minfreespace,
                                    oldpath,
                                    newpath);
 
-    return _rename_create_path(config.getattr,
-                               config.rename,
+    return _rename_create_path(config.func.getattr.policy,
+                               config.func.rename.policy,
                                config.branches,
                                config.minfreespace,
                                oldpath,

src/fuse_rmdir.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_rmdir.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -35,7 +34,7 @@ namespace l
 {
   static
   int
-  rmdir_loop_core(const string *basepath_,
+  rmdir_loop_core(const string &basepath_,
                   const char   *fusepath_,
                   const int     error_)
   {
@@ -52,8 +51,8 @@ namespace l
 
   static
   int
-  rmdir_loop(const vector<const string*> &basepaths_,
-             const char                  *fusepath_)
+  rmdir_loop(const vector<string> &basepaths_,
+             const char           *fusepath_)
   {
     int error;
 
@@ -74,9 +73,9 @@ namespace l
         const char           *fusepath_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -89,12 +88,11 @@ namespace FUSE
   int
   rmdir(const char *fusepath_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readguard(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::rmdir(config.rmdir,
+    return l::rmdir(config.func.rmdir.policy,
                     config.branches,
                     config.minfreespace,
                     fusepath_);

src/fuse_setxattr.cpp

@@ -22,7 +22,6 @@
 #include "fs_statvfs_cache.hpp"
 #include "num.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "str.hpp"
 #include "ugid.hpp"
 
@@ -48,430 +47,40 @@ namespace l
     return (strcmp(attrname_,SECURITY_CAPABILITY) == 0);
   }
 
-  static
-  void
-  split_attrval(const string &attrval,
-                string       &instruction,
-                string       &values)
-  {
-    size_t offset;
-
-    offset = attrval.find_first_of('/');
-    instruction = attrval.substr(0,offset);
-    if(offset != string::npos)
-      values = attrval.substr(offset);
-  }
-
   static
   int
-  setxattr_srcmounts(const string     &attrval,
-                     const int         flags,
-                     Branches         &branches_,
-                     pthread_rwlock_t &branches_lock)
-  {
-    const rwlock::WriteGuard wrg(&branches_lock);
-
-    string instruction;
-    string values;
-
-    if((flags & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    l::split_attrval(attrval,instruction,values);
-
-    if(instruction == "+")
-      branches_.add_end(values);
-    else if(instruction == "+<")
-      branches_.add_begin(values);
-    else if(instruction == "+>")
-      branches_.add_end(values);
-    else if(instruction == "-")
-      branches_.erase_fnmatch(values);
-    else if(instruction == "-<")
-      branches_.erase_begin();
-    else if(instruction == "->")
-      branches_.erase_end();
-    else if(instruction == "=")
-      branches_.set(values);
-    else if(instruction.empty())
-      branches_.set(values);
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_uint64_t(const string &attrval,
-                    const int     flags,
-                    uint64_t     &uint)
-  {
-    int rv;
-
-    if((flags & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    rv = num::to_uint64_t(attrval,uint);
-    if(rv == -1)
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_double(const string &attrval_,
-                  const int     flags_,
-                  double       *d_)
-  {
-    int rv;
-
-    if((flags_ & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    rv = num::to_double(attrval_,d_);
-    if(rv == -1)
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_time_t(const string &attrval,
-                  const int     flags,
-                  time_t       &time)
-  {
-    int rv;
-
-    if((flags & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    rv = num::to_time_t(attrval,time);
-    if(rv == -1)
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_bool(const string &attrval,
-                const int     flags,
-                bool         &value)
-  {
-    if((flags & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    if(attrval == "false")
-      value = false;
-    else if(attrval == "true")
-      value = true;
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_xattr(const string &attrval_,
-                 const int     flags_,
-                 int          &xattr_)
-  {
-    if((flags_ & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    if(attrval_ == "passthrough")
-      xattr_ = 0;
-    else if(attrval_ == "noattr")
-      xattr_ = ENOATTR;
-    else if(attrval_ == "nosys")
-      xattr_ = ENOSYS;
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_statfs(const string         &attrval_,
-                  const int             flags_,
-                  Config::StatFS::Enum &enum_)
-  {
-    if((flags_ & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    if(attrval_ == "base")
-      enum_ = Config::StatFS::BASE;
-    else if(attrval_ == "full")
-      enum_ = Config::StatFS::FULL;
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_statfsignore(const string               &attrval_,
-                        const int                   flags_,
-                        Config::StatFSIgnore::Enum &enum_)
-  {
-    if((flags_ & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    if(attrval_ == "none")
-      enum_ = Config::StatFSIgnore::NONE;
-    else if(attrval_ == "ro")
-      enum_ = Config::StatFSIgnore::RO;
-    else if(attrval_ == "nc")
-      enum_ = Config::StatFSIgnore::NC;
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr(const string       &attrval_,
-           const int           flags_,
-           Config::CacheFiles &cache_files_)
-  {
-    Config::CacheFiles tmp;
-
-    if((flags_ & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    tmp = attrval_;
-    if(!tmp.valid())
-      return -EINVAL;
-
-    cache_files_ = tmp;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_controlfile_func_policy(Config       &config,
-                                   const string &funcname,
-                                   const string &attrval,
-                                   const int     flags)
+  setxattr_controlfile(Config       &config,
+                       const string &attrname,
+                       const string &attrval,
+                       const int     flags)
   {
     int rv;
+    string key;
 
-    if((flags & XATTR_CREATE) == XATTR_CREATE)
-      return -EEXIST;
-
-    if(funcname == "open")
-      config.open_cache.clear();
-
-    rv = config.set_func_policy(funcname,attrval);
-    if(rv == -1)
-      return -errno;
+    if(!str::startswith(attrname,"user.mergerfs."))
+      return -ENOATTR;
 
-    return 0;
-  }
+    key = &attrname[14];
 
-  static
-  int
-  setxattr_controlfile_category_policy(Config       &config,
-                                       const string &categoryname,
-                                       const string &attrval,
-                                       const int     flags)
-  {
-    int rv;
+    if(config.has_key(key) == false)
+      return -ENOATTR;
 
     if((flags & XATTR_CREATE) == XATTR_CREATE)
       return -EEXIST;
 
-    if(categoryname == "search")
-      config.open_cache.clear();
-
-    rv = config.set_category_policy(categoryname,attrval);
-    if(rv == -1)
-      return -errno;
-
-    return 0;
-  }
-
-  static
-  int
-  setxattr_statfs_timeout(const string &attrval_,
-                          const int     flags_)
-  {
-    int rv;
-    uint64_t timeout;
-
-    rv = l::setxattr_uint64_t(attrval_,flags_,timeout);
-    if(rv >= 0)
-      fs::statvfs_cache_timeout(timeout);
+    rv = config.set(key,attrval);
+    if(rv < 0)
+      return rv;
 
-    return rv;
-  }
-
-  static
-  int
-  setxattr_controlfile_cache_attr(const string &attrval_,
-                                  const int     flags_)
-  {
-    int rv;
-    double d;
-
-    rv = l::setxattr_double(attrval_,flags_,&d);
-    if(rv >= 0)
-      fuse_config_set_attr_timeout(fuse_get_context()->fuse,d);
-
-    return rv;
-  }
-
-  static
-  int
-  setxattr_controlfile_cache_entry(const string &attrval_,
-                                   const int     flags_)
-  {
-    int rv;
-    double d;
-
-    rv = l::setxattr_double(attrval_,flags_,&d);
-    if(rv >= 0)
-      fuse_config_set_entry_timeout(fuse_get_context()->fuse,d);
-
-    return rv;
-  }
-
-  static
-  int
-  setxattr_controlfile_cache_negative_entry(const string &attrval_,
-                                            const int     flags_)
-  {
-    int rv;
-    double d;
-
-    rv = l::setxattr_double(attrval_,flags_,&d);
-    if(rv >= 0)
-      fuse_config_set_negative_entry_timeout(fuse_get_context()->fuse,d);
+    config.open_cache.clear();
+    fs::statvfs_cache_timeout(config.cache_statfs);
 
     return rv;
   }
 
   static
   int
-  setxattr_controlfile(Config       &config,
-                       const string &attrname,
-                       const string &attrval,
-                       const int     flags)
-  {
-    vector<string> attr;
-
-    str::split(attr,attrname,'.');
-
-    switch(attr.size())
-      {
-      case 3:
-        if(attr[2] == "srcmounts")
-          return l::setxattr_srcmounts(attrval,
-                                       flags,
-                                       config.branches,
-                                       config.branches_lock);
-        else if(attr[2] == "branches")
-          return l::setxattr_srcmounts(attrval,
-                                       flags,
-                                       config.branches,
-                                       config.branches_lock);
-        else if(attr[2] == "minfreespace")
-          return l::setxattr_uint64_t(attrval,
-                                      flags,
-                                      config.minfreespace);
-        else if(attr[2] == "moveonenospc")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.moveonenospc);
-        else if(attr[2] == "dropcacheonclose")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.dropcacheonclose);
-        else if(attr[2] == "symlinkify")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.symlinkify);
-        else if(attr[2] == "symlinkify_timeout")
-          return l::setxattr_time_t(attrval,
-                                    flags,
-                                    config.symlinkify_timeout);
-        else if(attr[2] == "ignorepponrename")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.ignorepponrename);
-        else if(attr[2] == "security_capability")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.security_capability);
-        else if(attr[2] == "xattr")
-          return l::setxattr_xattr(attrval,
-                                   flags,
-                                   config.xattr);
-        else if(attr[2] == "link_cow")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.link_cow);
-        else if(attr[2] == "statfs")
-          return l::setxattr_statfs(attrval,
-                                    flags,
-                                    config.statfs);
-        else if(attr[2] == "statfs_ignore")
-          return l::setxattr_statfsignore(attrval,
-                                          flags,
-                                          config.statfs_ignore);
-        else if(attr[2] == "direct_io")
-          return l::setxattr_bool(attrval,
-                                  flags,
-                                  config.direct_io);
-        break;
-
-      case 4:
-        if(attr[2] == "category")
-          return l::setxattr_controlfile_category_policy(config,
-                                                         attr[3],
-                                                         attrval,
-                                                         flags);
-        else if(attr[2] == "func")
-          return l::setxattr_controlfile_func_policy(config,
-                                                     attr[3],
-                                                     attrval,
-                                                     flags);
-        else if((attr[2] == "cache") && (attr[3] == "open"))
-          return l::setxattr_uint64_t(attrval,
-                                      flags,
-                                      config.open_cache.timeout);
-        else if((attr[2] == "cache") && (attr[3] == "statfs"))
-          return l::setxattr_statfs_timeout(attrval,flags);
-        else if((attr[2] == "cache") && (attr[3] == "attr"))
-          return l::setxattr_controlfile_cache_attr(attrval,flags);
-        else if((attr[2] == "cache") && (attr[3] == "entry"))
-          return l::setxattr_controlfile_cache_entry(attrval,flags);
-        else if((attr[2] == "cache") && (attr[3] == "negative_entry"))
-          return l::setxattr_controlfile_cache_negative_entry(attrval,flags);
-        else if((attr[2] == "cache") && (attr[3] == "readdir"))
-          return l::setxattr_bool(attrval,flags,config.cache_readdir);
-        else if((attr[2] == "cache") && (attr[3] == "files"))
-          return l::setxattr(attrval,flags,config.cache_files);
-        break;
-
-      default:
-        break;
-      }
-
-    return -EINVAL;
-  }
-
-  static
-  int
-  setxattr_loop_core(const string *basepath,
+  setxattr_loop_core(const string &basepath,
                      const char   *fusepath,
                      const char   *attrname,
                      const char   *attrval,
@@ -491,12 +100,12 @@ namespace l
 
   static
   int
-  setxattr_loop(const vector<const string*> &basepaths,
-                const char                  *fusepath,
-                const char                  *attrname,
-                const char                  *attrval,
-                const size_t                 attrvalsize,
-                const int                    flags)
+  setxattr_loop(const vector<string> &basepaths,
+                const char           *fusepath,
+                const char           *attrname,
+                const char           *attrval,
+                const size_t          attrvalsize,
+                const int             flags)
   {
     int error;
 
@@ -523,9 +132,9 @@ namespace l
            const int             flags)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc(branches_,fusepath,minfreespace,basepaths);
+    rv = actionFunc(branches_,fusepath,minfreespace,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -542,11 +151,10 @@ namespace FUSE
            size_t      attrvalsize,
            int         flags)
   {
-    const fuse_context *fc     = fuse_get_context();
-    const Config       &config = Config::get(fc);
+    Config &config = Config::rw();
 
     if(fusepath == config.controlfile)
-      return l::setxattr_controlfile(Config::get_writable(),
+      return l::setxattr_controlfile(config,
                                      attrname,
                                      string(attrval,attrvalsize),
                                      flags);
@@ -555,13 +163,13 @@ namespace FUSE
        l::is_attrname_security_capability(attrname))
       return -ENOATTR;
 
-    if(config.xattr)
-      return -config.xattr;
+    if(config.xattr.to_int())
+      return -config.xattr.to_int();
 
-    const ugid::Set         ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard readlock(&config.branches_lock);
+    const fuse_context *fc = fuse_get_context();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::setxattr(config.setxattr,
+    return l::setxattr(config.func.setxattr.policy,
                        config.branches,
                        config.minfreespace,
                        fusepath,

src/fuse_statfs.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_stat.hpp"
 #include "fs_base_statvfs.hpp"
 #include "fs_path.hpp"
-#include "rwlock.hpp"
 #include "statvfs_util.hpp"
 #include "ugid.hpp"
 
@@ -70,22 +69,22 @@ namespace l
 
   static
   bool
-  should_ignore(const StatFSIgnore::Enum  ignore_,
-                const Branch             *branch_,
-                const bool                readonly_)
+  should_ignore(const StatFSIgnore  ignore_,
+                const Branch       *branch_,
+                const bool          readonly_)
   {
-    return ((((ignore_ == StatFSIgnore::RO) || readonly_) &&
+    return ((((ignore_ == StatFSIgnore::ENUM::RO) || readonly_) &&
              (branch_->ro_or_nc())) ||
-            ((ignore_ == StatFSIgnore::NC) && (branch_->nc())));
+            ((ignore_ == StatFSIgnore::ENUM::NC) && (branch_->nc())));
   }
 
   static
   int
-  statfs(const Branches           &branches_,
-         const char               *fusepath_,
-         const StatFS::Enum        mode_,
-         const StatFSIgnore::Enum  ignore_,
-         struct statvfs           *fsstat_)
+  statfs(const Branches     &branches_,
+         const char         *fusepath_,
+         const StatFS        mode_,
+         const StatFSIgnore  ignore_,
+         struct statvfs     *fsstat_)
   {
     int rv;
     string fullpath;
@@ -101,7 +100,7 @@ namespace l
     min_namemax = std::numeric_limits<unsigned long>::max();
     for(size_t i = 0, ei = branches_.size(); i < ei; i++)
       {
-        fullpath = ((mode_ == StatFS::FULL) ?
+        fullpath = ((mode_ == StatFS::ENUM::FULL) ?
                     fs::path::make(&branches_[i].path,fusepath_) :
                     branches_[i].path);
 
@@ -153,10 +152,9 @@ namespace FUSE
   statfs(const char     *fusepath_,
          struct statvfs *st_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
     return l::statfs(config.branches,
                      fusepath_,

src/fuse_symlink.cpp

@@ -20,7 +20,6 @@
 #include "fs_clonepath.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -54,11 +53,11 @@ namespace l
 
   static
   int
-  symlink_loop(const string                &existingpath_,
-               const vector<const string*>  newbasepaths_,
-               const char                  *oldpath_,
-               const char                  *newpath_,
-               const string                &newdirpath_)
+  symlink_loop(const string         &existingpath_,
+               const vector<string> &newbasepaths_,
+               const char           *oldpath_,
+               const char           *newpath_,
+               const string         &newdirpath_)
   {
     int rv;
     int error;
@@ -66,11 +65,11 @@ namespace l
     error = -1;
     for(size_t i = 0, ei = newbasepaths_.size(); i != ei; i++)
       {
-        rv = fs::clonepath_as_root(existingpath_,*newbasepaths_[i],newdirpath_);
+        rv = fs::clonepath_as_root(existingpath_,newbasepaths_[i],newdirpath_);
         if(rv == -1)
           error = error::calc(rv,error,errno);
         else
-          error = l::symlink_loop_core(*newbasepaths_[i],
+          error = l::symlink_loop_core(newbasepaths_[i],
                                        oldpath_,
                                        newpath_,
                                        error);
@@ -90,20 +89,20 @@ namespace l
   {
     int rv;
     string newdirpath;
-    vector<const string*> newbasepaths;
-    vector<const string*> existingpaths;
+    vector<string> newbasepaths;
+    vector<string> existingpaths;
 
     newdirpath = fs::path::dirname(newpath_);
 
-    rv = searchFunc_(branches_,newdirpath,minfreespace_,existingpaths);
+    rv = searchFunc_(branches_,newdirpath,minfreespace_,&existingpaths);
     if(rv == -1)
       return -errno;
 
-    rv = createFunc_(branches_,newdirpath,minfreespace_,newbasepaths);
+    rv = createFunc_(branches_,newdirpath,minfreespace_,&newbasepaths);
     if(rv == -1)
       return -errno;
 
-    return l::symlink_loop(*existingpaths[0],newbasepaths,
+    return l::symlink_loop(existingpaths[0],newbasepaths,
                            oldpath_,newpath_,newdirpath);
   }
 }
@@ -114,13 +113,12 @@ namespace FUSE
   symlink(const char *oldpath_,
           const char *newpath_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::symlink(config.getattr,
-                      config.symlink,
+    return l::symlink(config.func.getattr.policy,
+                      config.func.symlink.policy,
                       config.branches,
                       config.minfreespace,
                       oldpath_,

src/fuse_truncate.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_truncate.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -37,7 +36,7 @@ namespace l
 {
   static
   int
-  truncate_loop_core(const string *basepath_,
+  truncate_loop_core(const string &basepath_,
                      const char   *fusepath_,
                      const off_t   size_,
                      const int     error_)
@@ -54,9 +53,9 @@ namespace l
 
   static
   int
-  truncate_loop(const vector<const string*> &basepaths_,
-                const char                  *fusepath_,
-                const off_t                  size_)
+  truncate_loop(const vector<string> &basepaths_,
+                const char           *fusepath_,
+                const off_t           size_)
   {
     int error;
 
@@ -78,9 +77,9 @@ namespace l
            const off_t           size_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -94,12 +93,11 @@ namespace FUSE
   truncate(const char *fusepath_,
            off_t       size_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::truncate(config.truncate,
+    return l::truncate(config.func.truncate.policy,
                        config.branches,
                        config.minfreespace,
                        fusepath_,

src/fuse_unlink.cpp

@@ -19,7 +19,6 @@
 #include "fs_base_unlink.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -36,7 +35,7 @@ namespace l
 {
   static
   int
-  unlink_loop_core(const string *basepath_,
+  unlink_loop_core(const string &basepath_,
                    const char   *fusepath_,
                    const int     error_)
   {
@@ -52,8 +51,8 @@ namespace l
 
   static
   int
-  unlink_loop(const vector<const string*> &basepaths_,
-              const char                  *fusepath_)
+  unlink_loop(const vector<string> &basepaths_,
+              const char           *fusepath_)
   {
     int error;
 
@@ -74,9 +73,9 @@ namespace l
          const char           *fusepath_)
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -89,14 +88,13 @@ namespace FUSE
   int
   unlink(const char *fusepath_)
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
     config.open_cache.erase(fusepath_);
 
-    return l::unlink(config.unlink,
+    return l::unlink(config.func.unlink.policy,
                      config.branches,
                      config.minfreespace,
                      fusepath_);

src/fuse_utimens.cpp

@@ -19,8 +19,8 @@
 #include "fs_base_utime.hpp"
 #include "fs_path.hpp"
 #include "rv.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
+
 #include <fuse.h>
 
 #include <string>
@@ -35,7 +35,7 @@ namespace l
 {
   static
   int
-  utimens_loop_core(const string   *basepath_,
+  utimens_loop_core(const string   &basepath_,
                     const char     *fusepath_,
                     const timespec  ts_[2],
                     const int       error_)
@@ -52,9 +52,9 @@ namespace l
 
   static
   int
-  utimens_loop(const vector<const string*> &basepaths_,
-               const char                  *fusepath_,
-               const timespec               ts_[2])
+  utimens_loop(const vector<string> &basepaths_,
+               const char           *fusepath_,
+               const timespec        ts_[2])
   {
     int error;
 
@@ -76,9 +76,9 @@ namespace l
           const timespec        ts_[2])
   {
     int rv;
-    vector<const string*> basepaths;
+    vector<string> basepaths;
 
-    rv = actionFunc_(branches_,fusepath_,minfreespace_,basepaths);
+    rv = actionFunc_(branches_,fusepath_,minfreespace_,&basepaths);
     if(rv == -1)
       return -errno;
 
@@ -92,12 +92,11 @@ namespace FUSE
   utimens(const char     *fusepath_,
           const timespec  ts_[2])
   {
-    const fuse_context      *fc     = fuse_get_context();
-    const Config            &config = Config::get(fc);
-    const ugid::Set          ugid(fc->uid,fc->gid);
-    const rwlock::ReadGuard  readlock(&config.branches_lock);
+    const fuse_context *fc     = fuse_get_context();
+    const Config       &config = Config::ro();
+    const ugid::Set     ugid(fc->uid,fc->gid);
 
-    return l::utimens(config.utimens,
+    return l::utimens(config.func.utimens.policy,
                       config.branches,
                       config.minfreespace,
                       fusepath_,

src/fuse_write.cpp

@@ -19,7 +19,6 @@
 #include "fileinfo.hpp"
 #include "fs_base_write.hpp"
 #include "fs_movefile.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <string>
@@ -92,14 +91,12 @@ namespace l
     rv = func_(fi->fd,buf_,count_,offset_);
     if(l::out_of_space(-rv))
       {
-        const fuse_context *fc     = fuse_get_context();
-        const Config       &config = Config::get(fc);
+        const Config &config = Config::ro();
 
         if(config.moveonenospc)
           {
             vector<string> paths;
             const ugid::Set ugid(0,0);
-            const rwlock::ReadGuard readlock(&config.branches_lock);
 
             config.branches.to_paths(paths);
 

src/fuse_write_buf.cpp

@@ -20,7 +20,6 @@
 #include "fs_movefile.hpp"
 #include "fuse_write.hpp"
 #include "policy.hpp"
-#include "rwlock.hpp"
 #include "ugid.hpp"
 
 #include <fuse.h>
@@ -61,6 +60,28 @@ namespace l
 
     return fuse_buf_copy(&dst,src_,cpflags);
   }
+
+  static
+  int
+  move_and_write_buf(fuse_bufvec *src_,
+                     off_t        offset_,
+                     FileInfo    *fi_)
+  {
+    int rv;
+    uint64_t extra;
+    vector<string> paths;
+    const ugid::Set ugid(0,0);
+    const Config &config = Config::ro();
+
+    config.branches.to_paths(paths);
+
+    extra = fuse_buf_size(src_);
+    rv = fs::movefile(paths,fi_->fusepath,extra,fi_->fd);
+    if(rv == -1)
+      return -ENOSPC;
+
+    return l::write_buf(fi_->fd,src_,offset_);
+  }
 }
 
 namespace FUSE
@@ -76,27 +97,7 @@ namespace FUSE
 
     rv = l::write_buf(fi->fd,src_,offset_);
     if(l::out_of_space(-rv))
-      {
-        const fuse_context *fc     = fuse_get_context();
-        const Config       &config = Config::get(fc);
-
-        if(config.moveonenospc)
-          {
-            size_t extra;
-            vector<string> paths;
-            const ugid::Set ugid(0,0);
-            const rwlock::ReadGuard readlock(&config.branches_lock);
-
-            config.branches.to_paths(paths);
-
-            extra = fuse_buf_size(src_);
-            rv = fs::movefile(paths,fi->fusepath,extra,fi->fd);
-            if(rv == -1)
-              return -ENOSPC;
-
-            rv = l::write_buf(fi->fd,src_,offset_);
-          }
-      }
+      rv = l::move_and_write_buf(src_,offset_,fi);
 
     return rv;
   }

src/fusefunc.cpp

@@ -1,95 +0,0 @@
-/*
-  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
-
-  Permission to use, copy, modify, and/or distribute this software for any
-  purpose with or without fee is hereby granted, provided that the above
-  copyright notice and this permission notice appear in all copies.
-
-  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-
-#include <string>
-#include <vector>
-
-#include "buildvector.hpp"
-#include "category.hpp"
-#include "fusefunc.hpp"
-
-#define FUSEFUNC(X,Y) FuseFunc(FuseFunc::Enum::X,#X,Category::Enum::Y)
-
-const std::vector<FuseFunc> FuseFunc::_fusefuncs_ =
-  buildvector<FuseFunc,true>
-  (FUSEFUNC(invalid,invalid))
-  (FUSEFUNC(access,search))
-  (FUSEFUNC(chmod,action))
-  (FUSEFUNC(chown,action))
-  (FUSEFUNC(create,create))
-  (FUSEFUNC(getattr,search))
-  (FUSEFUNC(getxattr,search))
-  (FUSEFUNC(link,action))
-  (FUSEFUNC(listxattr,search))
-  (FUSEFUNC(mkdir,create))
-  (FUSEFUNC(mknod,create))
-  (FUSEFUNC(open,search))
-  (FUSEFUNC(readlink,search))
-  (FUSEFUNC(removexattr,action))
-  (FUSEFUNC(rename,action))
-  (FUSEFUNC(rmdir,action))
-  (FUSEFUNC(setxattr,action))
-  (FUSEFUNC(symlink,create))
-  (FUSEFUNC(truncate,action))
-  (FUSEFUNC(unlink,action))
-  (FUSEFUNC(utimens,action))
-  ;
-
-const FuseFunc * const FuseFunc::fusefuncs = &_fusefuncs_[1];
-
-const FuseFunc &FuseFunc::invalid     = FuseFunc::fusefuncs[FuseFunc::Enum::invalid];
-const FuseFunc &FuseFunc::access      = FuseFunc::fusefuncs[FuseFunc::Enum::access];
-const FuseFunc &FuseFunc::chmod       = FuseFunc::fusefuncs[FuseFunc::Enum::chmod];
-const FuseFunc &FuseFunc::chown       = FuseFunc::fusefuncs[FuseFunc::Enum::chown];
-const FuseFunc &FuseFunc::create      = FuseFunc::fusefuncs[FuseFunc::Enum::create];
-const FuseFunc &FuseFunc::getattr     = FuseFunc::fusefuncs[FuseFunc::Enum::getattr];
-const FuseFunc &FuseFunc::getxattr    = FuseFunc::fusefuncs[FuseFunc::Enum::getxattr];
-const FuseFunc &FuseFunc::link        = FuseFunc::fusefuncs[FuseFunc::Enum::link];
-const FuseFunc &FuseFunc::listxattr   = FuseFunc::fusefuncs[FuseFunc::Enum::listxattr];
-const FuseFunc &FuseFunc::mkdir       = FuseFunc::fusefuncs[FuseFunc::Enum::mkdir];
-const FuseFunc &FuseFunc::mknod       = FuseFunc::fusefuncs[FuseFunc::Enum::mknod];
-const FuseFunc &FuseFunc::open        = FuseFunc::fusefuncs[FuseFunc::Enum::open];
-const FuseFunc &FuseFunc::readlink    = FuseFunc::fusefuncs[FuseFunc::Enum::readlink];
-const FuseFunc &FuseFunc::removexattr = FuseFunc::fusefuncs[FuseFunc::Enum::removexattr];
-const FuseFunc &FuseFunc::rmdir       = FuseFunc::fusefuncs[FuseFunc::Enum::rmdir];
-const FuseFunc &FuseFunc::setxattr    = FuseFunc::fusefuncs[FuseFunc::Enum::setxattr];
-const FuseFunc &FuseFunc::symlink     = FuseFunc::fusefuncs[FuseFunc::Enum::symlink];
-const FuseFunc &FuseFunc::truncate    = FuseFunc::fusefuncs[FuseFunc::Enum::truncate];
-const FuseFunc &FuseFunc::unlink      = FuseFunc::fusefuncs[FuseFunc::Enum::unlink];
-const FuseFunc &FuseFunc::utimens     = FuseFunc::fusefuncs[FuseFunc::Enum::utimens];
-
-const
-FuseFunc&
-FuseFunc::find(const std::string &str)
-{
-  for(int i = Enum::BEGIN; i != Enum::END; ++i)
-    {
-      if(fusefuncs[i] == str)
-        return fusefuncs[i];
-    }
-
-  return invalid;
-}
-
-const
-FuseFunc&
-FuseFunc::find(const FuseFunc::Enum::Type i)
-{
-  if((i >= FuseFunc::Enum::BEGIN) && (i  < FuseFunc::Enum::END))
-    return fusefuncs[i];
-
-  return invalid;
-}

src/fusefunc.hpp

@@ -1,125 +0,0 @@
-/*
-  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
-
-  Permission to use, copy, modify, and/or distribute this software for any
-  purpose with or without fee is hereby granted, provided that the above
-  copyright notice and this permission notice appear in all copies.
-
-  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-
-#pragma once
-
-#include "category.hpp"
-
-#include <string>
-#include <vector>
-
-class FuseFunc
-{
-public:
-  struct Enum
-  {
-    enum Type
-      {
-        invalid = -1,
-        BEGIN   = 0,
-        access  = BEGIN,
-        chmod,
-        chown,
-        create,
-        getattr,
-        getxattr,
-        link,
-        listxattr,
-        mkdir,
-        mknod,
-        open,
-        readlink,
-        removexattr,
-        rename,
-        rmdir,
-        setxattr,
-        symlink,
-        truncate,
-        unlink,
-        utimens,
-        END
-      };
-  };
-
-private:
-  Enum::Type           _enum;
-  std::string          _str;
-  Category::Enum::Type _category;
-
-public:
-  FuseFunc()
-    : _enum(invalid),
-      _str(invalid),
-      _category(Category::Enum::invalid)
-  {
-  }
-
-  FuseFunc(const Enum::Type            enum_,
-           const std::string          &str_,
-           const Category::Enum::Type  category_)
-    : _enum(enum_),
-      _str(str_),
-      _category(category_)
-  {
-  }
-
-public:
-  operator const Enum::Type() const { return _enum; }
-  operator const std::string&() const { return _str; }
-  operator const Category::Enum::Type() const { return _category; }
-  operator const FuseFunc*() const { return this; }
-
-  bool operator==(const std::string &str_) const
-  { return _str == str_; }
-
-  bool operator==(const Enum::Type enum_) const
-  { return _enum == enum_; }
-
-  bool operator!=(const FuseFunc &r) const
-  { return _enum != r._enum; }
-
-  bool operator<(const FuseFunc &r) const
-  { return _enum < r._enum; }
-
-public:
-  static const FuseFunc &find(const std::string&);
-  static const FuseFunc &find(const Enum::Type);
-
-public:
-  static const std::vector<FuseFunc>  _fusefuncs_;
-  static const FuseFunc * const       fusefuncs;
-  static const FuseFunc              &invalid;
-  static const FuseFunc              &access;
-  static const FuseFunc              &chmod;
-  static const FuseFunc              &chown;
-  static const FuseFunc              &create;
-  static const FuseFunc              &getattr;
-  static const FuseFunc              &getxattr;
-  static const FuseFunc              &link;
-  static const FuseFunc              &listxattr;
-  static const FuseFunc              &mkdir;
-  static const FuseFunc              &mknod;
-  static const FuseFunc              &open;
-  static const FuseFunc              &readlink;
-  static const FuseFunc              &removexattr;
-  static const FuseFunc              &rename;
-  static const FuseFunc              &rmdir;
-  static const FuseFunc              &setxattr;
-  static const FuseFunc              &symlink;
-  static const FuseFunc              &truncate;
-  static const FuseFunc              &unlink;
-  static const FuseFunc              &utimens;
-};

src/hw_cpu.cpp

@@ -0,0 +1,35 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+
+namespace hw
+{
+  namespace cpu
+  {
+    int
+    logical_core_count(void)
+    {
+#if defined _SC_NPROCESSORS_ONLN
+      return ::sysconf(_SC_NPROCESSORS_ONLN);
+#else
+      return 1;
+#endif
+    }
+  }
+}

src/hw_cpu.hpp

@@ -0,0 +1,27 @@
+/*
+  ISC License
+
+  Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+namespace hw
+{
+  namespace cpu
+  {
+    int logical_core_count(void);
+  }
+}

src/mergerfs.cpp

@@ -155,15 +155,25 @@ namespace l
   main(const int   argc_,
        char      **argv_)
   {
-    fuse_args       args;
-    fuse_operations ops = {0};
-    Config          config;
+    Config config;
+    fuse_args                args;
+    fuse_operations          ops;
+    std::vector<std::string> errs;
+
+    memset(&ops,0,sizeof(fuse_operations));
 
     args.argc      = argc_;
     args.argv      = argv_;
     args.allocated = 0;
 
-    options::parse(&args,&config);
+    options::parse(&args,&config,&errs);
+    if(errs.size())
+      {
+        for(uint64_t i = 0; i < errs.size(); i++)
+          std::cerr << "* ERROR: " << errs[i] << std::endl;
+
+        return 1;
+      }
 
     l::setup_resources();
     l::get_fuse_operations(ops,config.nullrw);

src/option_parser.cpp

@@ -15,9 +15,11 @@
 */
 
 #include "config.hpp"
+#include "ef.hpp"
 #include "errno.hpp"
 #include "fs_glob.hpp"
 #include "fs_statvfs_cache.hpp"
+#include "hw_cpu.hpp"
 #include "num.hpp"
 #include "policy.hpp"
 #include "str.hpp"
@@ -25,9 +27,9 @@
 
 #include <fuse.h>
 
+#include <fstream>
 #include <iomanip>
 #include <iostream>
-#include <sstream>
 #include <string>
 #include <vector>
 
@@ -46,6 +48,92 @@ enum
     MERGERFS_OPT_VERSION
   };
 
+struct Data
+{
+  Config         *config;
+  vector<string> *errs;
+};
+
+
+namespace l
+{
+  static
+  int
+  calculate_thread_count(int threads_)
+  {
+    int tc;
+
+    if(threads_ > 0)
+      return threads_;
+
+    tc = hw::cpu::logical_core_count();
+    if(threads_ < 0)
+      tc /= -threads_;
+    if(tc == 0)
+      tc = 1;
+
+    return tc;
+  }
+
+  static
+  void
+  read_config(Data         *data_,
+              std::istream &is_)
+  {
+    int rv;
+    std::string key;
+    std::string val;
+    std::string line;
+
+    rv = 0;
+    while(std::getline(is_,line,'\n'))
+      {
+        line = str::trim(line);
+        if(!line.empty() && (line[0] == '#'))
+          continue;
+
+        str::splitkv(line,'=',&key,&val);
+        key = str::trim(key);
+        val = str::trim(val);
+
+        if(key.empty() || val.empty())
+          continue;
+
+        rv = data_->config->set_raw(key,val);
+        switch(rv)
+          {
+          case -EINVAL:
+            data_->errs->push_back("invalid argument - " + line);
+            break;
+          case -ENOATTR:
+            data_->errs->push_back("unknown option - " + line);
+            break;
+          default:
+            break;
+          }
+      }
+  }
+
+  static
+  void
+  read_config(Data              *data_,
+              const std::string &filepath_)
+  {
+    std::ifstream is;
+
+    is.open(filepath_);
+    if(is.bad())
+      {
+        data_->errs->push_back("unable to open config - " + filepath_);
+      }
+    else
+      {
+        l::read_config(data_,is);
+
+        is.close();
+      }
+  }
+}
 
 static
 void
@@ -70,12 +158,26 @@ set_kv_option(fuse_args         *args,
   set_option(args,option);
 }
 
+static
+void
+set_threads(fuse_args *args_,
+            Config    *config_)
+{
+  int threads;
+
+  threads = l::calculate_thread_count(config_->threads);
+
+  config_->threads = threads;
+
+  set_kv_option(args_,"threads",config_->threads.to_string());
+}
+
 static
 void
 set_fsname(fuse_args *args_,
            Config    *config_)
 {
-  if(config_->fsname.empty())
+  if(config_->fsname->empty())
     {
       vector<string> branches;
 
@@ -104,337 +206,95 @@ set_default_options(fuse_args *args)
 
 static
 int
-parse_and_process(const std::string &value_,
-                  uint16_t          &uint16_,
-                  uint16_t           min_,
-                  uint16_t           max_)
+parse_and_process_kv_arg(Data              *data_,
+                         const std::string &key_,
+                         const std::string &val_)
 {
   int rv;
-  uint64_t uint64;
-
-  rv = num::to_uint64_t(value_,uint64);
-  if(rv == -1)
-    return 1;
-
-  if((uint64 > max_) || (uint64 < min_))
-    return 1;
-
-  uint16_ = uint64;
-
-  return 0;
-}
-
-static
-int
-parse_and_process(const std::string &value_,
-                  uint64_t          &int_)
-{
-  int rv;
-
-  rv = num::to_uint64_t(value_,int_);
-  if(rv == -1)
-    return 1;
-
-  return 0;
-}
-
-static
-int
-parse_and_process(const std::string &value,
-                  time_t            &time)
-{
-  int rv;
-
-  rv = num::to_time_t(value,time);
-  if(rv == -1)
-    return 1;
-
-  return 0;
-}
-
-static
-int
-parse_and_process(const std::string &value_,
-                  bool              &boolean_)
-{
-  if((value_ == "false") || (value_ == "0") || (value_ == "off"))
-    boolean_ = false;
-  else if((value_ == "true") || (value_ == "1") || (value_ == "on"))
-    boolean_ = true;
-  else
-    return 1;
-
-  return 0;
-}
-
-static
-int
-parse_and_process(const std::string &value_,
-                  std::string       &str_)
-{
-  str_ = value_;
-
-  return 0;
-}
-
-static
-int
-parse_and_process(const std::string  &value_,
-                  Config::CacheFiles &cache_files_)
-{
-  Config::CacheFiles tmp;
+  std::string key(key_);
+  std::string val(val_);
+
+  rv = 0;
+  if(key == "config")
+    return (l::read_config(data_,val_),0);
+  ef(key == "attr_timeout")
+    key = "cache.attr";
+  ef(key == "entry_timeout")
+    key = "cache.entry";
+  ef(key == "negative_entry")
+    key = "cache.negative_entry";
+  ef(key == "direct_io" && val.empty())
+    val = "true";
+  ef(key == "kernel_cache" && val.empty())
+    val = "true";
+  ef(key == "auto_cache" && val.empty())
+    val = "true";
+  ef(key == "async_read" && val.empty())
+    val = "true";
+  ef(key == "sync_read" && val.empty())
+    {key = "async_read", val = "false";}
+  ef(key == "defaults")
+    return 0;
+  ef(key == "hard_remove")
+    return 0;
+  ef(key == "atomic_o_trunc")
+    return 0;
+  ef(key == "big_writes")
+    return 0;
+  ef(key == "cache.open")
+    return 0;
 
-  tmp = value_;
-  if(!tmp.valid())
+  if(data_->config->has_key(key) == false)
     return 1;
 
-  cache_files_ = tmp;
-
-  return 0;
-}
-
-static
-int
-parse_and_process_errno(const std::string &value_,
-                        int               &errno_)
-{
-  if(value_ == "passthrough")
-    errno_ = 0;
-  else if(value_ == "nosys")
-    errno_ = ENOSYS;
-  else if(value_ == "noattr")
-    errno_ = ENOATTR;
-  else
-    return 1;
+  rv = data_->config->set_raw(key,val);
+  if(rv)
+    data_->errs->push_back("invalid argument - " + key_ + '=' + val_);
 
   return 0;
 }
 
 static
 int
-parse_and_process_statfs(const std::string    &value_,
-                         Config::StatFS::Enum &enum_)
+process_opt(Data              *data_,
+            const std::string &arg_)
 {
-  if(value_ == "base")
-    enum_ = Config::StatFS::BASE;
-  else if(value_ == "full")
-    enum_ = Config::StatFS::FULL;
-  else
-    return 1;
-
-  return 0;
-}
+  std::string key;
+  std::string val;
 
-static
-int
-parse_and_process_statfsignore(const std::string          &value_,
-                               Config::StatFSIgnore::Enum &enum_)
-{
-  if(value_ == "none")
-    enum_ = Config::StatFSIgnore::NONE;
-  else if(value_ == "ro")
-    enum_ = Config::StatFSIgnore::RO;
-  else if(value_ == "nc")
-    enum_ = Config::StatFSIgnore::NC;
-  else
-    return 1;
+  str::splitkv(arg_,'=',&key,&val);
 
-  return 0;
+  return parse_and_process_kv_arg(data_,key,val);
 }
 
 static
 int
-parse_and_process_statfs_cache(const std::string &value_)
+process_branches(Data       *data_,
+                 const char *arg_)
 {
   int rv;
-  uint64_t timeout;
+  string arg;
 
-  rv = num::to_uint64_t(value_,timeout);
-  if(rv == -1)
-    return 1;
-
-  fs::statvfs_cache_timeout(timeout);
+  arg = arg_;
+  rv = data_->config->set_raw("branches",arg);
+  if(rv)
+    data_->errs->push_back("unable to parse 'branches' - " + arg);
 
   return 0;
 }
 
 static
 int
-parse_and_process_cache(Config       &config_,
-                        const string &func_,
-                        const string &value_,
-                        fuse_args    *outargs)
-{
-  if(func_ == "open")
-    return parse_and_process(value_,config_.open_cache.timeout);
-  else if(func_ == "statfs")
-    return parse_and_process_statfs_cache(value_);
-  else if(func_ == "entry")
-    return (set_kv_option(outargs,"entry_timeout",value_),0);
-  else if(func_ == "negative_entry")
-    return (set_kv_option(outargs,"negative_timeout",value_),0);
-  else if(func_ == "attr")
-    return (set_kv_option(outargs,"attr_timeout",value_),0);
-  else if(func_ == "symlinks")
-    return parse_and_process(value_,config_.cache_symlinks);
-  else if(func_ == "readdir")
-    return parse_and_process(value_,config_.cache_readdir);
-  else if(func_ == "files")
-    return parse_and_process(value_,config_.cache_files);
-  else if(func_ == "writeback")
-    return parse_and_process(value_,config_.writeback_cache);
-
-  return 1;
-}
-
-static
-int
-parse_and_process_arg(Config            &config,
-                      const std::string &arg)
-{
-  if(arg == "defaults")
-    return 0;
-  else if(arg == "hard_remove")
-    return 0;
-  else if(arg == "direct_io")
-    return (config.direct_io=true,0);
-  else if(arg == "kernel_cache")
-    return (config.kernel_cache=true,0);
-  else if(arg == "auto_cache")
-    return (config.auto_cache=true,0);
-  else if(arg == "async_read")
-    return (config.async_read=true,0);
-  else if(arg == "sync_read")
-    return (config.async_read=false,0);
-  else if(arg == "atomic_o_trunc")
-    return 0;
-  else if(arg == "big_writes")
-    return 0;
-  else if(arg == "readdir_ino")
-    return 0;
-
-  return 1;
-}
-
-static
-int
-parse_and_process_kv_arg(Config            &config,
-                         const std::string &key,
-                         const std::string &value,
-                         fuse_args         *outargs)
-{
-  int rv;
-  std::vector<std::string> keypart;
-
-  rv = -1;
-  str::split(keypart,key,'.');
-  if(keypart.size() == 2)
-    {
-      if(keypart[0] == "func")
-        rv = config.set_func_policy(keypart[1],value);
-      else if(keypart[0] == "category")
-        rv = config.set_category_policy(keypart[1],value);
-      else if(keypart[0] == "cache")
-        rv = parse_and_process_cache(config,keypart[1],value,outargs);
-    }
-  else
-    {
-      if(key == "minfreespace")
-        rv = parse_and_process(value,config.minfreespace);
-      else if(key == "moveonenospc")
-        rv = parse_and_process(value,config.moveonenospc);
-      else if(key == "dropcacheonclose")
-        rv = parse_and_process(value,config.dropcacheonclose);
-      else if(key == "symlinkify")
-        rv = parse_and_process(value,config.symlinkify);
-      else if(key == "symlinkify_timeout")
-        rv = parse_and_process(value,config.symlinkify_timeout);
-      else if(key == "nullrw")
-        rv = parse_and_process(value,config.nullrw);
-      else if(key == "ignorepponrename")
-        rv = parse_and_process(value,config.ignorepponrename);
-      else if(key == "security_capability")
-        rv = parse_and_process(value,config.security_capability);
-      else if(key == "link_cow")
-        rv = parse_and_process(value,config.link_cow);
-      else if(key == "xattr")
-        rv = parse_and_process_errno(value,config.xattr);
-      else if(key == "statfs")
-        rv = parse_and_process_statfs(value,config.statfs);
-      else if(key == "statfs_ignore")
-        rv = parse_and_process_statfsignore(value,config.statfs_ignore);
-      else if(key == "fsname")
-        rv = parse_and_process(value,config.fsname);
-      else if(key == "posix_acl")
-        rv = parse_and_process(value,config.posix_acl);
-      else if(key == "direct_io")
-        rv = parse_and_process(value,config.direct_io);
-      else if(key == "kernel_cache")
-        rv = parse_and_process(value,config.kernel_cache);
-      else if(key == "auto_cache")
-        rv = parse_and_process(value,config.auto_cache);
-      else if(key == "async_read")
-        rv = parse_and_process(value,config.async_read);
-      else if(key == "readdirplus")
-        rv = parse_and_process(value,config.readdirplus);
-      else if(key == "max_write")
-        rv = 0;
-      else if(key == "fuse_msg_size")
-        rv = parse_and_process(value,config.fuse_msg_size,
-                               1,
-                               FUSE_MAX_MAX_PAGES);
-    }
-
-  if(rv == -1)
-    rv = 1;
-
-  return rv;
-}
-
-static
-int
-process_opt(Config            &config,
-            const std::string &arg,
-            fuse_args         *outargs)
+process_mount(Data       *data_,
+              const char *arg_)
 {
   int rv;
-  std::vector<std::string> argvalue;
+  string arg;
 
-  str::split(argvalue,arg,'=');
-  switch(argvalue.size())
-    {
-    case 1:
-      rv = parse_and_process_arg(config,argvalue[0]);
-      break;
-
-    case 2:
-      rv = parse_and_process_kv_arg(config,argvalue[0],argvalue[1],outargs);
-      break;
-
-    default:
-      rv = 1;
-      break;
-    };
-
-  return rv;
-}
-
-static
-int
-process_branches(const char *arg,
-                 Config     &config)
-{
-  config.branches.set(arg);
-
-  return 0;
-}
-
-static
-int
-process_destmounts(const char *arg,
-                   Config     &config)
-{
-  config.destmount = arg;
+  arg = arg_;
+  rv = data_->config->set_raw("mount",arg);
+  if(rv)
+    data_->errs->push_back("unable to set 'mount' - " + arg);
 
   return 1;
 }
@@ -453,6 +313,7 @@ usage(void)
     "mergerfs options:\n"
     "    <branches>             ':' delimited list of directories. Supports\n"
     "                           shell globbing (must be escaped in shell)\n"
+    "    -o config=<file>       Read options from file in key=val format\n"
     "    -o func.<f>=<p>        Set function <f> to policy <p>\n"
     "    -o category.<c>=<p>    Set functions in category <c> to <p>\n"
     "    -o cache.open=<int>    'open' policy cache timeout in seconds.\n"
@@ -536,53 +397,53 @@ usage(void)
 
 static
 int
-option_processor(void       *data,
-                 const char *arg,
-                 int         key,
-                 fuse_args  *outargs)
+option_processor(void       *data_,
+                 const char *arg_,
+                 int         key_,
+                 fuse_args  *outargs_)
 {
-  int     rv     = 0;
-  Config &config = *(Config*)data;
+  Data *data = (Data*)data_;
 
-  switch(key)
+  switch(key_)
     {
     case FUSE_OPT_KEY_OPT:
-      rv = process_opt(config,arg,outargs);
-      break;
+      return process_opt(data,arg_);
 
     case FUSE_OPT_KEY_NONOPT:
-      rv = config.branches.empty() ?
-        process_branches(arg,config) :
-        process_destmounts(arg,config);
-      break;
+      if(data->config->branches.empty())
+        return process_branches(data,arg_);
+      else
+        return process_mount(data,arg_);
 
     case MERGERFS_OPT_HELP:
       usage();
       close(2);
       dup(1);
-      fuse_opt_add_arg(outargs,"-ho");
+      fuse_opt_add_arg(outargs_,"-ho");
       break;
 
     case MERGERFS_OPT_VERSION:
       std::cout << "mergerfs version: "
                 << (MERGERFS_VERSION[0] ? MERGERFS_VERSION : "unknown")
                 << std::endl;
-      fuse_opt_add_arg(outargs,"--version");
+      fuse_opt_add_arg(outargs_,"--version");
       break;
 
     default:
       break;
     }
 
-  return rv;
+  return 0;
 }
 
 namespace options
 {
   void
-  parse(fuse_args *args_,
-        Config    *config_)
+  parse(fuse_args                *args_,
+        Config                   *config_,
+        std::vector<std::string> *errs_)
   {
+    Data data;
     const struct fuse_opt opts[] =
       {
         FUSE_OPT_KEY("-h",MERGERFS_OPT_HELP),
@@ -593,13 +454,16 @@ namespace options
         {NULL,-1U,0}
       };
 
+    data.config = config_;
+    data.errs   = errs_;
     fuse_opt_parse(args_,
-                   config_,
+                   &data,
                    opts,
                    ::option_processor);
 
     set_default_options(args_);
     set_fsname(args_,config_);
     set_subtype(args_);
+    set_threads(args_,config_);
   }
 }

src/option_parser.hpp

@@ -18,11 +18,15 @@
 
 #include "config.hpp"
 
+#include <string>
+#include <vector>
+
 #include <fuse.h>
 
 namespace options
 {
   void
-  parse(fuse_args *args,
-        Config    *config);
+  parse(fuse_args                *args,
+        Config                   *config,
+        std::vector<std::string> *errs);
 }

src/policy.hpp

@@ -58,30 +58,33 @@ public:
   {
     typedef std::string string;
     typedef std::vector<string> strvec;
-    typedef std::vector<const string*> cstrptrvec;
     typedef const string cstring;
     typedef const uint64_t cuint64_t;
     typedef const strvec cstrvec;
     typedef const Category::Enum::Type CType;
 
-    typedef int (*Ptr)(CType,const Branches &,const char *,cuint64_t,cstrptrvec &);
+    typedef int (*Ptr)(CType,const Branches &,const char *,cuint64_t,strvec *);
 
     template <CType T>
     class Base
     {
     public:
-      Base(const Policy *p)
-        : func(p->_func)
+      Base(const Policy &p_)
+        : func(p_._func)
+      {}
+
+      Base(const Policy *p_)
+        : func(p_->_func)
       {}
 
       int
-      operator()(const Branches &b,const char *c,cuint64_t d,cstrptrvec &e)
+      operator()(const Branches &b,const char *c,cuint64_t d,strvec *e)
       {
         return func(T,b,c,d,e);
       }
 
       int
-      operator()(const Branches &b,const string &c,cuint64_t d,cstrptrvec &e)
+      operator()(const Branches &b,const string &c,cuint64_t d,strvec *e)
       {
         return func(T,b,c.c_str(),d,e);
       }
@@ -90,11 +93,11 @@ public:
       operator()(const Branches &b,const char *c,cuint64_t d,string *e)
       {
         int rv;
-        cstrptrvec v;
+        strvec v;
 
-        rv = func(T,b,c,d,v);
+        rv = func(T,b,c,d,&v);
         if(!v.empty())
-          *e = *v[0];
+          *e = v[0];
 
         return rv;
       }
@@ -107,21 +110,21 @@ public:
     typedef Base<Category::Enum::create> Create;
     typedef Base<Category::Enum::search> Search;
 
-    static int invalid(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int all(CType,const Branches&,const char*,cuint64_t,cstrptrvec&);
-    static int epall(CType,const Branches&,const char*,cuint64_t,cstrptrvec&);
-    static int epff(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int eplfs(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int eplus(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int epmfs(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int eprand(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int erofs(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int ff(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int lfs(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int lus(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int mfs(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int newest(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
-    static int rand(CType,const Branches&,const char *,cuint64_t,cstrptrvec&);
+    static int invalid(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int all(CType,const Branches&,const char*,cuint64_t,strvec*);
+    static int epall(CType,const Branches&,const char*,cuint64_t,strvec*);
+    static int epff(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int eplfs(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int eplus(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int epmfs(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int eprand(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int erofs(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int ff(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int lfs(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int lus(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int mfs(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int newest(CType,const Branches&,const char *,cuint64_t,strvec*);
+    static int rand(CType,const Branches&,const char *,cuint64_t,strvec*);
   };
 
 private:
@@ -161,6 +164,7 @@ public:
   operator const std::string&() const { return _str; }
   operator const Func::Ptr() const { return _func; }
   operator const Policy*() const { return this; }
+  const std::string& to_string() const { return _str; }
 
   bool operator==(const Enum::Type enum_) const
   { return _enum == enum_; }
@@ -180,6 +184,7 @@ public:
   static const Policy &find(const Enum::Type);
 
 public:
+
   static const std::vector<Policy> _policies_;
   static const Policy * const      policies;
 
@@ -199,3 +204,14 @@ public:
   static const Policy &newest;
   static const Policy &rand;
 };
+
+namespace std
+{
+  static
+  inline
+  string
+  to_string(const Policy &p_)
+  {
+    return p_.to_string();
+  }
+}

src/policy_all.cpp

@@ -20,6 +20,7 @@
 #include "fs_path.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -31,10 +32,12 @@ namespace all
 {
   static
   int
-  create(const Branches        &branches_,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const uint64_t  minfreespace_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     fs::info_t info;
@@ -52,13 +55,13 @@ namespace all
           error_and_continue(error,ENOENT);
         if(info.readonly)
           error_and_continue(error,EROFS);
-        if(info.spaceavail < minfreespace)
+        if(info.spaceavail < minfreespace_)
           error_and_continue(error,ENOSPC);
 
-        paths.push_back(&branch->path);
+        paths_->push_back(branch->path);
       }
 
-    if(paths.empty())
+    if(paths_->empty())
       return (errno=error,-1);
 
     return 0;
@@ -66,14 +69,14 @@ namespace all
 }
 
 int
-Policy::Func::all(const Category::Enum::Type  type,
+Policy::Func::all(const Category::Enum::Type  type_,
                   const Branches             &branches_,
-                  const char                 *fusepath,
-                  const uint64_t              minfreespace,
-                  vector<const string*>      &paths)
+                  const char                 *fusepath_,
+                  const uint64_t              minfreespace_,
+                  vector<string>             *paths_)
 {
-  if(type == Category::Enum::create)
-    return all::create(branches_,minfreespace,paths);
+  if(type_ == Category::Enum::create)
+    return all::create(branches_,minfreespace_,paths_);
 
-  return Policy::Func::epall(type,branches_,fusepath,minfreespace,paths);
+  return Policy::Func::epall(type_,branches_,fusepath_,minfreespace_,paths_);
 }

src/policy_cache.cpp

@@ -3,13 +3,11 @@
 #include <cstdlib>
 #include <map>
 #include <string>
-#include <vector>
 
 #include <time.h>
 
 using std::map;
 using std::string;
-using std::vector;
 
 static const uint64_t DEFAULT_TIMEOUT = 0;
 

src/policy_epall.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -33,11 +34,13 @@ namespace epall
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     fs::info_t info;
@@ -60,10 +63,10 @@ namespace epall
         if(info.spaceavail < minfreespace)
           error_and_continue(error,ENOSPC);
 
-        paths.push_back(&branch->path);
+        paths->push_back(branch->path);
       }
 
-    if(paths.empty())
+    if(paths->empty())
       return (errno=error,-1);
 
     return 0;
@@ -71,10 +74,12 @@ namespace epall
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     bool readonly;
@@ -95,10 +100,10 @@ namespace epall
         if(readonly)
           error_and_continue(error,EROFS);
 
-        paths.push_back(&branch->path);
+        paths->push_back(branch->path);
       }
 
-    if(paths.empty())
+    if(paths->empty())
       return (errno=error,-1);
 
     return 0;
@@ -106,10 +111,12 @@ namespace epall
 
   static
   int
-  search(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  search(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     const Branch *branch;
 
     for(size_t i = 0, ei = branches_.size(); i != ei; i++)
@@ -119,10 +126,10 @@ namespace epall
         if(!fs::exists(branch->path,fusepath))
           continue;
 
-        paths.push_back(&branch->path);
+        paths->push_back(branch->path);
       }
 
-    if(paths.empty())
+    if(paths->empty())
       return (errno=ENOENT,-1);
 
     return 0;
@@ -134,7 +141,7 @@ Policy::Func::epall(const Category::Enum::Type  type,
                     const Branches             &branches_,
                     const char                 *fusepath,
                     const uint64_t              minfreespace,
-                    vector<const string*>      &paths)
+                    vector<string>             *paths)
 {
   switch(type)
     {

src/policy_epff.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -33,11 +34,13 @@ namespace epff
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath_,
+         const uint64_t  minfreespace_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     fs::info_t info;
@@ -48,7 +51,7 @@ namespace epff
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           error_and_continue(error,ENOENT);
         if(branch->ro_or_nc())
           error_and_continue(error,EROFS);
@@ -57,10 +60,10 @@ namespace epff
           error_and_continue(error,ENOENT);
         if(info.readonly)
           error_and_continue(error,EROFS);
-        if(info.spaceavail < minfreespace)
+        if(info.spaceavail < minfreespace_)
           error_and_continue(error,ENOSPC);
 
-        paths.push_back(&branch->path);
+        paths_->push_back(branch->path);
 
         return 0;
       }
@@ -70,10 +73,12 @@ namespace epff
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     bool readonly;
@@ -84,7 +89,7 @@ namespace epff
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           error_and_continue(error,ENOENT);
         if(branch->ro())
           error_and_continue(error,EROFS);
@@ -94,7 +99,7 @@ namespace epff
         if(readonly)
           error_and_continue(error,EROFS);
 
-        paths.push_back(&branch->path);
+        paths_->push_back(branch->path);
 
         return 0;
       }
@@ -104,20 +109,22 @@ namespace epff
 
   static
   int
-  search(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  search(const Branches &branches_,
+         const char     *fusepath_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     const Branch *branch;
 
     for(size_t i = 0, ei = branches_.size(); i != ei; i++)
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           continue;
 
-        paths.push_back(&branch->path);
+        paths_->push_back(branch->path);
 
         return 0;
       }
@@ -127,20 +134,20 @@ namespace epff
 }
 
 int
-Policy::Func::epff(const Category::Enum::Type  type,
+Policy::Func::epff(const Category::Enum::Type  type_,
                    const Branches             &branches_,
-                   const char                 *fusepath,
-                   const uint64_t              minfreespace,
-                   vector<const string*>      &paths)
+                   const char                 *fusepath_,
+                   const uint64_t              minfreespace_,
+                   vector<string>             *paths_)
 {
-  switch(type)
+  switch(type_)
     {
     case Category::Enum::create:
-      return epff::create(branches_,fusepath,minfreespace,paths);
+      return epff::create(branches_,fusepath_,minfreespace_,paths_);
     case Category::Enum::action:
-      return epff::action(branches_,fusepath,paths);
+      return epff::action(branches_,fusepath_,paths_);
     case Category::Enum::search:
     default:
-      return epff::search(branches_,fusepath,paths);
+      return epff::search(branches_,fusepath_,paths_);
     }
 }

src/policy_eplfs.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <limits>
 #include <string>
@@ -34,11 +35,13 @@ namespace eplfs
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t eplfs;
@@ -74,17 +77,19 @@ namespace eplfs
     if(eplfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(eplfsbasepath);
+    paths->push_back(*eplfsbasepath);
 
     return 0;
   }
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t eplfs;
@@ -118,7 +123,7 @@ namespace eplfs
     if(eplfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(eplfsbasepath);
+    paths->push_back(*eplfsbasepath);
 
     return 0;
   }
@@ -127,8 +132,10 @@ namespace eplfs
   int
   search(const Branches        &branches_,
          const char            *fusepath,
-         vector<const string*> &paths)
+         vector<string>        *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     uint64_t eplfs;
     uint64_t spaceavail;
@@ -156,7 +163,7 @@ namespace eplfs
     if(eplfsbasepath == NULL)
       return (errno=ENOENT,-1);
 
-    paths.push_back(eplfsbasepath);
+    paths->push_back(*eplfsbasepath);
 
     return 0;
   }
@@ -167,7 +174,7 @@ Policy::Func::eplfs(const Category::Enum::Type  type,
                     const Branches             &branches_,
                     const char                 *fusepath,
                     const uint64_t              minfreespace,
-                    vector<const string*>      &paths)
+                    vector<string>             *paths)
 {
   switch(type)
     {

src/policy_eplus.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <limits>
 #include <string>
@@ -34,11 +35,13 @@ namespace eplus
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t eplus;
@@ -74,17 +77,19 @@ namespace eplus
     if(eplusbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(eplusbasepath);
+    paths->push_back(*eplusbasepath);
 
     return 0;
   }
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t eplus;
@@ -118,17 +123,19 @@ namespace eplus
     if(eplusbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(eplusbasepath);
+    paths->push_back(*eplusbasepath);
 
     return 0;
   }
 
   static
   int
-  search(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  search(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     uint64_t eplus;
     uint64_t spaceused;
@@ -156,7 +163,7 @@ namespace eplus
     if(eplusbasepath == NULL)
       return (errno=ENOENT,-1);
 
-    paths.push_back(eplusbasepath);
+    paths->push_back(*eplusbasepath);
 
     return 0;
   }
@@ -167,7 +174,7 @@ Policy::Func::eplus(const Category::Enum::Type  type,
                     const Branches             &branches_,
                     const char                 *fusepath,
                     const uint64_t              minfreespace,
-                    vector<const string*>      &paths)
+                    vector<string>             *paths)
 {
   switch(type)
     {

src/policy_epmfs.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <limits>
 #include <string>
@@ -34,11 +35,13 @@ namespace epmfs
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath_,
+         const uint64_t  minfreespace_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t epmfs;
@@ -53,7 +56,7 @@ namespace epmfs
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           error_and_continue(error,ENOENT);
         if(branch->ro_or_nc())
           error_and_continue(error,EROFS);
@@ -62,7 +65,7 @@ namespace epmfs
           error_and_continue(error,ENOENT);
         if(info.readonly)
           error_and_continue(error,EROFS);
-        if(info.spaceavail < minfreespace)
+        if(info.spaceavail < minfreespace_)
           error_and_continue(error,ENOSPC);
         if(info.spaceavail < epmfs)
           continue;
@@ -74,17 +77,19 @@ namespace epmfs
     if(epmfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(epmfsbasepath);
+    paths_->push_back(*epmfsbasepath);
 
     return 0;
   }
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t epmfs;
@@ -99,7 +104,7 @@ namespace epmfs
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           error_and_continue(error,ENOENT);
         if(branch->ro())
           error_and_continue(error,EROFS);
@@ -118,17 +123,19 @@ namespace epmfs
     if(epmfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(epmfsbasepath);
+    paths_->push_back(*epmfsbasepath);
 
     return 0;
   }
 
   static
   int
-  search(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  search(const Branches &branches_,
+         const char     *fusepath_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     uint64_t epmfs;
     uint64_t spaceavail;
@@ -141,7 +148,7 @@ namespace epmfs
       {
         branch = &branches_[i];
 
-        if(!fs::exists(branch->path,fusepath))
+        if(!fs::exists(branch->path,fusepath_))
           continue;
         rv = fs::statvfs_cache_spaceavail(branch->path,&spaceavail);
         if(rv == -1)
@@ -156,27 +163,27 @@ namespace epmfs
     if(epmfsbasepath == NULL)
       return (errno=ENOENT,-1);
 
-    paths.push_back(epmfsbasepath);
+    paths_->push_back(*epmfsbasepath);
 
     return 0;
   }
 }
 
 int
-Policy::Func::epmfs(const Category::Enum::Type  type,
+Policy::Func::epmfs(const Category::Enum::Type  type_,
                     const Branches             &branches_,
-                    const char                 *fusepath,
-                    const uint64_t              minfreespace,
-                    vector<const string*>      &paths)
+                    const char                 *fusepath_,
+                    const uint64_t              minfreespace_,
+                    vector<string>             *paths_)
 {
-  switch(type)
+  switch(type_)
     {
     case Category::Enum::create:
-      return epmfs::create(branches_,fusepath,minfreespace,paths);
+      return epmfs::create(branches_,fusepath_,minfreespace_,paths_);
     case Category::Enum::action:
-      return epmfs::action(branches_,fusepath,paths);
+      return epmfs::action(branches_,fusepath_,paths_);
     case Category::Enum::search:
     default:
-      return epmfs::search(branches_,fusepath,paths);
+      return epmfs::search(branches_,fusepath_,paths_);
     }
 }

src/policy_eprand.cpp

@@ -29,15 +29,15 @@ Policy::Func::eprand(const Category::Enum::Type  type_,
                      const Branches             &branches_,
                      const char                 *fusepath_,
                      const uint64_t              minfreespace_,
-                     vector<const string*>      &paths_)
+                     vector<string>             *paths_)
 {
   int rv;
 
   rv = Policy::Func::epall(type_,branches_,fusepath_,minfreespace_,paths_);
   if(rv == 0)
     {
-      std::random_shuffle(paths_.begin(),paths_.end());
-      paths_.resize(1);
+      std::random_shuffle(paths_->begin(),paths_->end());
+      paths_->resize(1);
     }
 
   return rv;

src/policy_erofs.cpp

@@ -24,11 +24,11 @@ using std::string;
 using std::vector;
 
 int
-Policy::Func::erofs(const Category::Enum::Type  type,
+Policy::Func::erofs(const Category::Enum::Type  type_,
                     const Branches             &branches_,
-                    const char                 *fusepath,
-                    const uint64_t              minfreespace,
-                    vector<const string*>      &paths)
+                    const char                 *fusepath_,
+                    const uint64_t              minfreespace_,
+                    vector<string>             *paths)
 {
   return (errno=EROFS,-1);
 }

src/policy_ff.cpp

@@ -21,6 +21,7 @@
 #include "fs_path.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -32,10 +33,12 @@ namespace ff
 {
   static
   int
-  create(const Branches        &branches_,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     fs::info_t info;
@@ -56,7 +59,7 @@ namespace ff
         if(info.spaceavail < minfreespace)
           error_and_continue(error,ENOSPC);
 
-        paths.push_back(&branch->path);
+        paths->push_back(branch->path);
 
         return 0;
       }
@@ -70,7 +73,7 @@ Policy::Func::ff(const Category::Enum::Type  type,
                  const Branches             &branches_,
                  const char                 *fusepath,
                  const uint64_t              minfreespace,
-                 vector<const string*>      &paths)
+                 vector<string>             *paths)
 {
   if(type == Category::Enum::create)
     return ff::create(branches_,minfreespace,paths);

src/policy_invalid.cpp

@@ -28,7 +28,7 @@ Policy::Func::invalid(const Category::Enum::Type  type,
                       const Branches             &branches_,
                       const char                 *fusepath,
                       const uint64_t              minfreespace,
-                      vector<const string*>      &paths)
+                      vector<string>             *paths)
 {
   return (errno=EINVAL,-1);
 }

src/policy_lfs.cpp

@@ -21,6 +21,7 @@
 #include "fs_path.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <limits>
 #include <string>
@@ -33,10 +34,12 @@ namespace lfs
 {
   static
   int
-  create(const Branches        &branches_,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const uint64_t  minfreespace_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t lfs;
@@ -58,7 +61,7 @@ namespace lfs
           error_and_continue(error,ENOENT);
         if(info.readonly)
           error_and_continue(error,EROFS);
-        if(info.spaceavail < minfreespace)
+        if(info.spaceavail < minfreespace_)
           error_and_continue(error,ENOSPC);
         if(info.spaceavail > lfs)
           continue;
@@ -70,7 +73,7 @@ namespace lfs
     if(lfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(lfsbasepath);
+    paths_->push_back(*lfsbasepath);
 
     return 0;
   }
@@ -81,7 +84,7 @@ Policy::Func::lfs(const Category::Enum::Type  type,
                   const Branches             &branches_,
                   const char                 *fusepath,
                   const uint64_t              minfreespace,
-                  vector<const string*>      &paths)
+                  vector<string>             *paths)
 {
   if(type == Category::Enum::create)
     return lfs::create(branches_,minfreespace,paths);

src/policy_lus.cpp

@@ -21,6 +21,7 @@
 #include "fs_path.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <limits>
 #include <string>
@@ -33,10 +34,12 @@ namespace lus
 {
   static
   int
-  create(const Branches        &branches_,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t lus;
@@ -70,7 +73,7 @@ namespace lus
     if(lusbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(lusbasepath);
+    paths->push_back(*lusbasepath);
 
     return 0;
   }
@@ -81,7 +84,7 @@ Policy::Func::lus(const Category::Enum::Type  type,
                   const Branches             &branches_,
                   const char                 *fusepath,
                   const uint64_t              minfreespace,
-                  vector<const string*>      &paths)
+                  vector<string>             *paths)
 {
   if(type == Category::Enum::create)
     return lus::create(branches_,minfreespace,paths);

src/policy_mfs.cpp

@@ -21,6 +21,7 @@
 #include "fs_path.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -32,10 +33,12 @@ namespace mfs
 {
   static
   int
-  create(const Branches        &branches_,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const uint64_t  minfreespace_,
+         vector<string> *paths_)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     uint64_t mfs;
@@ -57,7 +60,7 @@ namespace mfs
           error_and_continue(error,ENOENT);
         if(info.readonly)
           error_and_continue(error,EROFS);
-        if(info.spaceavail < minfreespace)
+        if(info.spaceavail < minfreespace_)
           error_and_continue(error,ENOSPC);
         if(info.spaceavail < mfs)
           continue;
@@ -69,7 +72,7 @@ namespace mfs
     if(mfsbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(mfsbasepath);
+    paths_->push_back(*mfsbasepath);
 
     return 0;
   }
@@ -80,7 +83,7 @@ Policy::Func::mfs(const Category::Enum::Type  type,
                   const Branches             &branches_,
                   const char                 *fusepath,
                   const uint64_t              minfreespace,
-                  vector<const string*>      &paths)
+                  vector<string>             *paths)
 {
   if(type == Category::Enum::create)
     return mfs::create(branches_,minfreespace,paths);

src/policy_newest.cpp

@@ -22,6 +22,7 @@
 #include "fs_statvfs_cache.hpp"
 #include "policy.hpp"
 #include "policy_error.hpp"
+#include "rwlock.hpp"
 
 #include <string>
 #include <vector>
@@ -36,11 +37,13 @@ namespace newest
 {
   static
   int
-  create(const Branches        &branches_,
-         const char            *fusepath,
-         const uint64_t         minfreespace,
-         vector<const string*> &paths)
+  create(const Branches &branches_,
+         const char     *fusepath,
+         const uint64_t  minfreespace,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     time_t newest;
@@ -77,17 +80,19 @@ namespace newest
     if(newestbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(newestbasepath);
+    paths->push_back(*newestbasepath);
 
     return 0;
   }
 
   static
   int
-  action(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  action(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     int rv;
     int error;
     bool readonly;
@@ -122,17 +127,19 @@ namespace newest
     if(newestbasepath == NULL)
       return (errno=error,-1);
 
-    paths.push_back(newestbasepath);
+    paths->push_back(*newestbasepath);
 
     return 0;
   }
 
   static
   int
-  search(const Branches        &branches_,
-         const char            *fusepath,
-         vector<const string*> &paths)
+  search(const Branches &branches_,
+         const char     *fusepath,
+         vector<string> *paths)
   {
+    rwlock::ReadGuard guard(&branches_.lock);
+
     time_t newest;
     struct stat st;
     const Branch *branch;
@@ -156,7 +163,7 @@ namespace newest
     if(newestbasepath == NULL)
       return (errno=ENOENT,-1);
 
-    paths.push_back(newestbasepath);
+    paths->push_back(*newestbasepath);
 
     return 0;
   }
@@ -167,7 +174,7 @@ Policy::Func::newest(const Category::Enum::Type  type,
                      const Branches             &branches_,
                      const char                 *fusepath,
                      const uint64_t              minfreespace,
-                     vector<const string*>      &paths)
+                     vector<string>             *paths)
 {
   switch(type)
     {

src/policy_rand.cpp

@@ -29,15 +29,15 @@ Policy::Func::rand(const Category::Enum::Type  type_,
                    const Branches             &branches_,
                    const char                 *fusepath_,
                    const uint64_t              minfreespace_,
-                   vector<const string*>      &paths_)
+                   vector<string>             *paths_)
 {
   int rv;
 
   rv = Policy::Func::all(type_,branches_,fusepath_,minfreespace_,paths_);
   if(rv == 0)
     {
-      std::random_shuffle(paths_.begin(),paths_.end());
-      paths_.resize(1);
+      std::random_shuffle(paths_->begin(),paths_->end());
+      paths_->resize(1);
     }
 
   return rv;

src/str.cpp

@@ -43,7 +43,25 @@ namespace str
         const string   &str,
         const char      delimiter)
   {
-    return split(result,str.c_str(),delimiter);
+    return str::split(result,str.c_str(),delimiter);
+  }
+
+  void
+  splitkv(const string &str_,
+          const char    delimiter_,
+          string       *key_,
+          string       *val_)
+  {
+    istringstream iss;
+    std::string key;
+    std::string val;
+
+    iss.str(str_);
+    std::getline(iss,key,delimiter_);
+    std::getline(iss,val,'\0');
+
+    *key_ = key;
+    *val_ = val;
   }
 
   string
@@ -149,8 +167,16 @@ namespace str
   }
 
   bool
-  ends_with(const string &str_,
-            const string &suffix_)
+  startswith(const string &str_,
+             const string &prefix_)
+  {
+    return ((str_.size() >= prefix_.size()) &&
+            (str_.compare(0,prefix_.size(),prefix_) == 0));
+  }
+
+  bool
+  endswith(const string &str_,
+           const string &suffix_)
   {
     if(suffix_.size() > str_.size())
       return false;
@@ -159,4 +185,19 @@ namespace str
                       suffix_.rend(),
                       str_.rbegin());
   }
+
+  std::string
+  trim(const std::string &str_)
+  {
+    std::string rv;
+
+    rv = str_;
+
+    while(!rv.empty() && (rv[0] == ' '))
+      rv.erase(0);
+    while(!rv.empty() && (rv[rv.size()-1] == ' '))
+      rv.erase(rv.size()-1);
+
+    return rv;
+  }
 }

src/str.hpp

@@ -30,6 +30,12 @@ namespace str
         const std::string        &str,
         const char                delimiter);
 
+  void
+  splitkv(const std::string &str,
+          const char         delimiter,
+          std::string       *key,
+          std::string       *value);
+
   std::string
   join(const std::vector<std::string> &vec,
        const size_t                    substridx,
@@ -58,6 +64,13 @@ namespace str
            const std::string &s1);
 
   bool
-  ends_with(const std::string &str_,
-            const std::string &suffix_);
+  startswith(const std::string &str_,
+             const std::string &prefix_);
+
+  bool
+  endswith(const std::string &str_,
+           const std::string &suffix_);
+
+  std::string
+  trim(const std::string &str);
 }

src/to_string.cpp

@@ -0,0 +1,58 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+
+namespace str
+{
+  std::string
+  to(const bool bool_)
+  {
+    return (bool_ ? "true" : "false");
+  }
+
+  std::string
+  to(const int int_)
+  {
+    char buf[24];
+
+    sprintf(buf,"%d",int_);
+
+    return buf;
+  }
+
+  std::string
+  to(const uint64_t uint64_)
+  {
+    char buf[64];
+
+    sprintf(buf,"%llu",(unsigned long long)uint64_);
+
+    return buf;
+  }
+
+  std::string
+  to(const std::string &s_)
+  {
+    return s_;
+  }
+}

src/to_string.hpp

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include <string>
+
+#include <stdint.h>
+
+namespace str
+{
+  std::string to(const bool);
+  std::string to(const int);
+  std::string to(const uint64_t);
+  std::string to(const std::string&);
+}

src/tofrom_string.hpp

@@ -0,0 +1,47 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include <string>
+
+class ToFromString
+{
+public:
+  virtual std::string to_string() const = 0;
+  virtual int from_string(const std::string &) = 0;
+};
+
+namespace std
+{
+  inline
+  static
+  std::string
+  to_string(const ToFromString *o_)
+  {
+    return o_->to_string();
+  }
+
+  inline
+  static
+  std::string
+  to_string(const ToFromString &o_)
+  {
+    return o_.to_string();
+  }
+}

src/tofrom_wrapper.hpp

@@ -0,0 +1,131 @@
+/*
+  ISC License
+
+  Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "from_string.hpp"
+#include "to_string.hpp"
+#include "tofrom_string.hpp"
+
+#include <errno.h>
+
+template<typename T>
+class ToFromWrapper : public ToFromString
+{
+public:
+  int
+  from_string(const std::string &s_)
+  {
+    return str::from(s_,&_data);
+  }
+
+  std::string
+  to_string(void) const
+  {
+    return str::to(_data);
+  }
+
+public:
+  ToFromWrapper<T>()
+  {
+  }
+
+  ToFromWrapper<T>(const T data_)
+    : _data(data_)
+  {
+  }
+
+public:
+  ToFromWrapper<T>&
+  operator=(const T data_)
+  {
+    _data = data_;
+    return *this;
+  }
+
+public:
+  operator T() const
+  {
+    return _data;
+  }
+
+  T*
+  operator->()
+  {
+    return &_data;
+  }
+
+public:
+  bool
+  operator==(const T data_) const
+  {
+    return (_data == data_);
+  }
+
+private:
+  T _data;
+};
+
+template<typename T>
+class ROToFromWrapper : public ToFromString
+{
+public:
+  int
+  from_string(const std::string &s_)
+  {
+    return -EINVAL;
+  }
+
+  std::string
+  to_string(void) const
+  {
+    return str::to(_data);
+  }
+
+public:
+  ROToFromWrapper<T>()
+  {
+  }
+
+  ROToFromWrapper<T>(const T data_)
+    : _data(data_)
+  {
+  }
+
+public:
+  operator T() const
+  {
+    return _data;
+  }
+
+  T*
+  operator->()
+  {
+    return &_data;
+  }
+
+public:
+  bool
+  operator==(const T data_) const
+  {
+    return (_data == data_);
+  }
+
+private:
+  T _data;
+};