Merge pull request #144 from trapexit/enospc

move on enospc when writing feature. closes #141

Makefile

@@ -104,7 +104,7 @@ $(warning "xattr not available: disabling")
 CFLAGS += -DWITHOUT_XATTR
 endif
 
-all: $(TARGET) clonepath
+all: $(TARGET) clone
 
 help:
 	@echo "usage: make"
@@ -113,7 +113,7 @@ help:
 $(TARGET): src/version.hpp obj/obj-stamp $(OBJ)
 	$(CXX) $(CFLAGS) $(OBJ) -o $@ $(LDFLAGS)
 
-clonepath: $(TARGET)
+clone: $(TARGET)
 	$(LN) -s $< $@
 
 changelog:
@@ -139,18 +139,18 @@ obj/%.o: src/%.cpp
 clean: rpm-clean
 	$(RM) -rf obj
 	$(RM) -f src/version.hpp
-	$(RM) -f "$(TARGET)" "$(MANPAGE)" clonepath
+	$(RM) -f "$(TARGET)" "$(MANPAGE)" clone
 	$(FIND) . -name "*~" -delete
 
 distclean: clean
 	$(GIT) clean -fd
 
-install: install-base install-clonepath install-man
+install: install-base install-clone install-man
 
 install-base: $(TARGET)
 	$(INSTALL) -v -m 0755 -D "$(TARGET)" "$(INSTALLBINDIR)/$(TARGET)"
 
-install-clonepath: clonepath
+install-clone: clone
 	$(CP) -a $< "$(INSTALLBINDIR)/$<"
 
 install-man: $(MANPAGE)
@@ -159,13 +159,13 @@ install-man: $(MANPAGE)
 install-strip: install-base
 	$(STRIP) "$(INSTALLBINDIR)/$(TARGET)"
 
-uninstall: uninstall-base uninstall-clonepath uninstall-man
+uninstall: uninstall-base uninstall-clone uninstall-man
 
 uninstall-base:
 	$(RM) -f "$(INSTALLBINDIR)/$(TARGET)"
 
-uninstall-clonepath:
-	$(RM) -f "$(INSTALLBINDIR)/clonepath"
+uninstall-clone:
+	$(RM) -f "$(INSTALLBINDIR)/clone"
 
 uninstall-man:
 	$(RM) -f "$(INSTALLMAN1DIR)/$(MANPAGE)"

README.md

@@ -33,7 +33,8 @@ Why **mergerfs** when those exist? **mhddfs** has not been updated in some time
 
 * **defaults**: a shortcut for FUSE's **atomic_o_trunc**, **auto_cache**, **big_writes**, **default_permissions**, **splice_move**, **splice_read**, and **splice_write**. These options seem to provide the best performance.
 * **direct_io**: causes FUSE to bypass an addition caching step which can increase write speeds at the detriment of read speed. 
-* **minfreespace**: (defaults to **4G**) the minimum space value used for the **lfs**, **fwfs**, and **epmfs** policies. Understands 'K', 'M', and 'G' to represent kilobyte, megabyte, and gigabyte respectively.
+* **minfreespace**: the minimum space value used for the **lfs**, **fwfs**, and **epmfs** policies. Understands 'K', 'M', and 'G' to represent kilobyte, megabyte, and gigabyte respectively. (default: 4G)
+* **moveonenospc**: when enabled (set to **true**) if a **write** fails with **ENOSPC** a scan of all drives will be done looking for the drive with 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)
 * **func.<func>=<policy>**: sets the specific FUSE function's policy. See below for the list of value types. Example: **func.getattr=newest**
 * **category.<category>=<policy>**: Sets policy of all FUSE functions in the provided category. Example: **category.create=mfs**
 
@@ -173,8 +174,9 @@ Use `xattr -l /mount/point/.mergerfs` to see all supported keys.
 [trapexit:/tmp/mount] $ xattr -l .mergerfs
 user.mergerfs.srcmounts: /tmp/a:/tmp/b
 user.mergerfs.minfreespace: 4294967295
+user.mergerfs.moveonenospc: false
 user.mergerfs.policies: all,einval,enosys,enotsup,epmfs,erofs,exdev,ff,ffwp,fwfs,lfs,mfs,newest,rand
-user.mergerfs.version: 2.5.0
+user.mergerfs.version: x.y.z
 user.mergerfs.category.action: all
 user.mergerfs.category.create: epmfs
 user.mergerfs.category.search: ff
@@ -232,10 +234,20 @@ For **user.mergerfs.srcmounts** there are several instructions available for man
 | -<           | remove first in list |
 | ->           | remove last in list |
 
+##### minfreespace #####
 
-##### misc #####
+Input: interger with an optional suffix. **K**, **M**, or **G**.
+Output: value in bytes
 
-Categories and funcs take a policy as described in the previous section. When reading funcs you'll get the policy string. However, with categories you'll get a comma separated list of policies for each type found. For example: if all search functions are **ff** except for **access** which is **ffwp** the value for **user.mergerfs.category.search** will be **ff,ffwp**.
+##### moveonenospc #####
+
+Input: **true** and **false**
+Ouput: **true** or **false**
+
+##### categories / funcs #####
+
+Input: short policy string as described elsewhere in this document
+Output: the policy string except for categories where its funcs have multiple types. In that case it will be a comma separated list.
 
 #### mergerfs file xattrs ####
 

src/access.cpp

@@ -34,10 +34,10 @@
 #include <unistd.h>
 #include <errno.h>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/chmod.cpp

@@ -28,10 +28,10 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/chown.cpp

@@ -29,10 +29,10 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/clone.cpp

@@ -0,0 +1,69 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <iostream>
+
+#include "fs.hpp"
+#include "fs_clonefile.hpp"
+#include "fs_clonepath.hpp"
+
+namespace clonetool
+{
+  static
+  void
+  print_usage_and__exit(void)
+  {
+    std::cerr << "usage: clone "
+              << "[path <sourcedir> <destdir> <relativepath>]"
+              << " | "
+              << "[file <source> <dest>]"
+              << std::endl;
+    _exit(1);
+  }
+
+  int
+  main(const int    argc,
+       char * const argv[])
+  {
+    int rv = 0;
+    
+    if(argc == 4 && !strcmp(argv[1],"file"))
+      rv = fs::clonefile(argv[2],argv[3]);
+    else if(argc == 5 && !strcmp(argv[1],"path"))
+      rv = fs::clonepath(argv[2],argv[3],argv[4]);
+    else
+      print_usage_and__exit();
+
+    if(rv == -1)
+      std::cerr << "error: "
+                << strerror(errno)
+                << std::endl;
+
+    return 0;
+  }
+}

src/clonepath.hpp → src/clone.hpp

@@ -22,7 +22,7 @@
    THE SOFTWARE.
  */
 
-namespace clonepath
+namespace clonetool
 {
   int
   main(const int     argc,

src/config.cpp

@@ -45,6 +45,7 @@ namespace mergerfs
       srcmounts(),
       srcmountslock(),
       minfreespace(UINT32_MAX),
+      moveonenospc(false),
       POLICYINIT(access),
       POLICYINIT(chmod),
       POLICYINIT(chown),

src/config.hpp

@@ -54,6 +54,7 @@ namespace mergerfs
     std::vector<std::string> srcmounts;
     mutable pthread_rwlock_t srcmountslock;
     size_t                   minfreespace;
+    bool                     moveonenospc;
 
   public:
     const Policy  *policies[FuseFunc::Enum::END];

src/create.cpp

@@ -33,9 +33,11 @@
 #include <vector>
 
 #include "config.hpp"
-#include "ugid.hpp"
-#include "fs.hpp"
+#include "fileinfo.hpp"
+#include "fs_path.hpp"
+#include "fs_clonepath.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
@@ -80,7 +82,7 @@ _create(Policy::Func::Search  searchFunc,
   if(fd == -1)
     return -errno;
 
-  fh = fd;
+  fh = reinterpret_cast<uint64_t>(new FileInfo(fd));
 
   return 0;
 }
@@ -92,7 +94,7 @@ namespace mergerfs
     int
     create(const char     *fusepath,
            mode_t          mode,
-           fuse_file_info *fileinfo)
+           fuse_file_info *ffi)
     {
       const fuse_context      *fc     = fuse_get_context();
       const Config            &config = Config::get(fc);
@@ -105,8 +107,8 @@ namespace mergerfs
                      config.minfreespace,
                      fusepath,
                      (mode & ~fc->umask),
-                     fileinfo->flags,
-                     fileinfo->fh);
+                     ffi->flags,
+                     ffi->fh);
     }
   }
 }

src/create.hpp

@@ -32,6 +32,6 @@ namespace mergerfs
     int
     create(const char     *fusepath,
            mode_t          mode,
-           fuse_file_info *fileinfo);
+           fuse_file_info *ffi);
   }
 }

src/fallocate.cpp

@@ -33,6 +33,8 @@
 #include <errno.h>
 #include <fcntl.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _fallocate(const int   fd,
@@ -73,7 +75,9 @@ namespace mergerfs
               off_t           len,
               fuse_file_info *ffi)
     {
-      return _fallocate(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _fallocate(fi->fd,
                         mode,
                         offset,
                         len);

src/fgetattr.cpp

@@ -29,6 +29,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _fgetattr(const int    fd,
@@ -50,7 +52,9 @@ namespace mergerfs
              struct stat    *st,
              fuse_file_info *ffi)
     {
-      return _fgetattr(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _fgetattr(fi->fd,
                        *st);
     }
   }

src/clonepath.cpp → src/fileinfo.hpp

@@ -22,33 +22,19 @@
    THE SOFTWARE.
 */
 
-#include <unistd.h>
+#ifndef __FILEINFO_HPP__
+#define __FILEINFO_HPP__
 
-#include <iostream>
-
-#include "fs.hpp"
-
-namespace clonepath
+class FileInfo
 {
-  static
-  void
-  print_usage_and__exit(void)
+public:
+  FileInfo(int _fd) :
+    fd(_fd)
   {
-    std::cerr << "usage: clonepath "
-              << "<sourcedir> <destdir> <relativepath>"
-              << std::endl;
-    _exit(1);
   }
 
-  int
-  main(const int    argc,
-       char * const argv[])
-  {
-    if(argc != 4)
-      print_usage_and__exit();
+public:
+  int fd;
+};
 
-    return fs::clonepath(argv[1],
-                         argv[2],
-                         argv[3]);
-  }
-}
+#endif

src/flush.cpp

@@ -27,6 +27,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _flush(const int fd)
@@ -50,7 +52,9 @@ namespace mergerfs
     flush(const char     *fusepath,
           fuse_file_info *ffi)
     {
-      return _flush(ffi->fh);
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _flush(fi->fd);
     }
   }
 }

src/fs.cpp

@@ -24,128 +24,28 @@
 
 #include <string>
 #include <vector>
-#include <map>
-#include <sstream>
-#include <cstdlib>
-#include <iterator>
 
-#include <stdlib.h>
-#include <limits.h>
-#include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <linux/fs.h>
-#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <glob.h>
+#include <limits.h>
+#include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/statvfs.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <glob.h>
 
-#include "fs.hpp"
-#include "xattr.hpp"
+#include "fs_attr.hpp"
+#include "fs_path.hpp"
+#include "fs_xattr.hpp"
 #include "str.hpp"
 
 using std::string;
 using std::vector;
-using std::map;
-using std::istringstream;
-
-template <typename Iter>
-Iter
-random_element(Iter begin,
-               Iter end)
-{
-  const unsigned long n = std::distance(begin, end);
-
-  std::advance(begin, (std::rand() % n));
-
-  return begin;
-}
 
 namespace fs
 {
-  namespace path
-  {
-    string
-    dirname(const string &path)
-    {
-      string parent = path;
-      string::reverse_iterator i;
-      string::reverse_iterator bi;
-
-      bi = parent.rend();
-      i  = parent.rbegin();
-      while(*i == '/' && i != bi)
-        i++;
-
-      while(*i != '/' && i != bi)
-        i++;
-
-      while(*i == '/' && i != bi)
-        i++;
-
-      parent.erase(i.base(),parent.end());
-
-      return parent;
-    }
-
-    string
-    basename(const string &path)
-    {
-      return path.substr(path.find_last_of('/')+1);
-    }
-
-    bool
-    is_empty(const string &path)
-    {
-      DIR           *dir;
-      struct dirent *de;
-
-      dir = ::opendir(path.c_str());
-      if(!dir)
-        return false;
-
-      while((de = ::readdir(dir)))
-        {
-          const char *d_name = de->d_name;
-
-          if(d_name[0] == '.'     &&
-             ((d_name[1] == '\0') ||
-              (d_name[1] == '.' && d_name[2] == '\0')))
-            continue;
-
-          ::closedir(dir);
-
-          return false;
-        }
-
-      ::closedir(dir);
-
-      return true;
-    }
-
-    bool
-    exists(const vector<string> &paths,
-           const string         &fusepath)
-    {
-      for(size_t i = 0, ei = paths.size(); i != ei; i++)
-        {
-          int rv;
-          string path;
-          struct stat st;
-
-          fs::path::make(paths[i],fusepath,path);
-
-          rv  = ::lstat(path.c_str(),&st);
-          if(rv == 0)
-            return true;
-        }
-
-      return false;
-    }
-  }
-
   void
   findallfiles(const vector<string> &srcmounts,
                const string         &fusepath,
@@ -166,331 +66,37 @@ namespace fs
   }
 
   int
-  listxattr(const string &path,
-            vector<char> &attrs)
-  {
-#ifndef WITHOUT_XATTR
-    int rv;
-    int size;
-
-    rv    = -1;
-    errno = ERANGE;
-    while(rv == -1 && errno == ERANGE)
-      {
-        size = ::listxattr(path.c_str(),NULL,0);
-        attrs.resize(size);
-        rv   = ::listxattr(path.c_str(),&attrs[0],size);
-      }
-
-    return rv;
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  listxattr(const string   &path,
-            vector<string> &attrvector)
-  {
-    int rv;
-    vector<char> attrs;
-
-    rv = listxattr(path,attrs);
-    if(rv != -1)
-      {
-        string tmp(attrs.begin(),attrs.end());
-        str::split(attrvector,tmp,'\0');
-      }
-
-    return rv;
-  }
-
-  int
-  listxattr(const string &path,
-            string       &attrstr)
-  {
-    int rv;
-    vector<char> attrs;
-
-    rv = listxattr(path,attrs);
-    if(rv != -1)
-      attrstr = string(attrs.begin(),attrs.end());
-
-    return rv;
-  }
-
-  int
-  getxattr(const string &path,
-           const string &attr,
-           vector<char> &value)
-  {
-#ifndef WITHOUT_XATTR
-    int rv;
-    int size;
-
-    rv    = -1;
-    errno = ERANGE;
-    while(rv == -1 && errno == ERANGE)
-      {
-        size = ::getxattr(path.c_str(),attr.c_str(),NULL,0);
-        value.resize(size);
-        rv   = ::getxattr(path.c_str(),attr.c_str(),&value[0],size);
-      }
-
-    return rv;
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  getxattr(const string &path,
-           const string &attr,
-           string       &value)
-  {
-    int          rv;
-    vector<char> tmpvalue;
-
-    rv = getxattr(path,attr,tmpvalue);
-    if(rv != -1)
-      value = string(tmpvalue.begin(),tmpvalue.end());
-
-    return rv;
-  }
-
-
-  int
-  getxattrs(const string       &path,
-            map<string,string> &attrs)
-  {
-    int rv;
-    string attrstr;
-
-    rv = listxattr(path,attrstr);
-    if(rv == -1)
-      return -1;
-
-    {
-      string key;
-      istringstream ss(attrstr);
-
-      while(getline(ss,key,'\0'))
-        {
-          string value;
-
-          rv = getxattr(path,key,value);
-          if(rv != -1)
-            attrs[key] = value;
-        }
-    }
-
-    return 0;
-  }
-
-  int
-  setxattr(const string &path,
-           const string &key,
-           const string &value,
-           const int     flags)
-  {
-#ifndef WITHOUT_XATTR
-    return ::setxattr(path.c_str(),
-                      key.c_str(),
-                      value.data(),
-                      value.size(),
-                      flags);
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  setxattr(const int     fd,
-           const string &key,
-           const string &value,
-           const int     flags)
-  {
-#ifndef WITHOUT_XATTR
-    return ::fsetxattr(fd,
-                       key.c_str(),
-                       value.data(),
-                       value.size(),
-                       flags);
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  setxattrs(const string             &path,
-            const map<string,string> &attrs)
-  {
-    int fd;
-
-    fd = ::open(path.c_str(),O_RDONLY|O_NONBLOCK);
-    if(fd == -1)
-      return -1;
-
-    for(map<string,string>::const_iterator
-          i = attrs.begin(), ei = attrs.end(); i != ei; ++i)
-      {
-        setxattr(fd,i->first,i->second,0);
-      }
-
-    return ::close(fd);
-  }
-
-  int
-  copyxattrs(const string &from,
-             const string &to)
-  {
-    int rv;
-    map<string,string> attrs;
-
-    rv = getxattrs(from,attrs);
-    if(rv == -1)
-      return -1;
-
-    return setxattrs(to,attrs);
-  }
-
-  static
-  int
-  get_fs_ioc_flags(const string &file,
-                   int          &flags)
+  findonfs(const vector<string> &srcmounts,
+           const string         &fusepath,
+           const int             fd,
+           string               &basepath)
   {
-    int fd;
     int rv;
-    const int openflags = O_RDONLY|O_NONBLOCK;
-
-    fd = ::open(file.c_str(),openflags);
-    if(fd == -1)
-      return -1;
+    string tmppath;
+    unsigned long fsid;
+    struct statvfs buf;
 
-    rv = ::ioctl(fd,FS_IOC_GETFLAGS,&flags);
+    rv = ::fstatvfs(fd,&buf);
     if(rv == -1)
-      {
-        int error = errno;
-        ::close(fd);
-        errno = error;
       return -1;
-      }
-
-    return ::close(fd);
-  }
 
-  static
-  int
-  set_fs_ioc_flags(const string &file,
-                   const int     flags)
+    fsid = buf.f_fsid;
+    for(int i = 0, ei = srcmounts.size(); i != ei; i++)
       {
-    int fd;
-    int rv;
-    const int openflags = O_RDONLY|O_NONBLOCK;
-
-    fd = ::open(file.c_str(),openflags);
-    if(fd == -1)
-      return -1;
+        fs::path::make(srcmounts[i],fusepath,tmppath);
 
-    rv = ::ioctl(fd,FS_IOC_SETFLAGS,&flags);
+        rv = ::statvfs(tmppath.c_str(),&buf);
         if(rv == -1)
-      {
-        int error = errno;
-        ::close(fd);
-        errno = error;
-        return -1;
-      }
-
-    return ::close(fd);
-  }
-
-  int
-  copyattr(const string &from,
-           const string &to)
-  {
-    int rv;
-    int flags;
-
-    rv = get_fs_ioc_flags(from,flags);
-    if(rv == -1)
-      return -1;
-
-    return set_fs_ioc_flags(to,flags);
-  }
-
-  static
-  bool
-  ignorable_error(const int err)
-  {
-    switch(err)
-      {
-      case ENOTTY:
-      case ENOTSUP:
-#if ENOTSUP != EOPNOTSUPP
-      case EOPNOTSUPP:
-#endif
-        return true;
-      }
-
-    return false;
-  }
-
-  int
-  clonepath(const string &fromsrc,
-            const string &tosrc,
-            const string &relative)
-  {
-    int         rv;
-    struct stat st;
-    string      topath;
-    string      frompath;
-    string      dirname;
+          continue;
 
-    dirname = fs::path::dirname(relative);
-    if(!dirname.empty())
+        if(buf.f_fsid == fsid)
           {
-        rv = clonepath(fromsrc,tosrc,dirname);
-        if(rv == -1)
-          return -1;
+            basepath = srcmounts[i];
+            return 0;
           }
-
-    fs::path::make(fromsrc,relative,frompath);
-    rv = ::stat(frompath.c_str(),&st);
-    if(rv == -1)
-      return -1;
-    else if(!S_ISDIR(st.st_mode))
-      return (errno = ENOTDIR,-1);
-
-    fs::path::make(tosrc,relative,topath);
-    rv = ::mkdir(topath.c_str(),st.st_mode);
-    if(rv == -1)
-      {
-        if(errno != EEXIST)
-          return -1;
-
-        rv = ::chmod(topath.c_str(),st.st_mode);
-        if(rv == -1)
-          return -1;
       }
 
-    rv = ::chown(topath.c_str(),st.st_uid,st.st_gid);
-    if(rv == -1)
-      return -1;
-
-    // It may not support it... it's fine...
-    rv = copyattr(frompath,topath);
-    if(rv == -1 && !ignorable_error(errno))
-      return -1;
-
-    rv = copyxattrs(frompath,topath);
-    if(rv == -1 && !ignorable_error(errno))
-      return -1;
-
-    return 0;
+    return (errno=ENOENT,-1);
   }
 
   void
@@ -528,4 +134,48 @@ namespace fs
         strs[i] = buf;
       }
   }
+
+  int
+  getfl(const int fd)
+  {
+    return ::fcntl(fd,F_GETFL,0);
+  }
+
+  int
+  mfs(const vector<string> &basepaths,
+      const size_t          minfreespace,
+      string               &path)
+  {
+    fsblkcnt_t mfs;
+    ssize_t    mfsidx;
+
+    mfs    = 0;
+    mfsidx = -1;
+    for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
+      {
+        int rv;
+        struct statvfs fsstats;
+        const string &basepath = basepaths[i];
+
+        rv = ::statvfs(basepath.c_str(),&fsstats);
+        if(rv == 0)
+          {
+            fsblkcnt_t spaceavail;
+
+            spaceavail = (fsstats.f_frsize * fsstats.f_bavail);
+            if((spaceavail > mfs) && (spaceavail >= minfreespace))
+              {
+                mfs    = spaceavail;
+                mfsidx = i;
+              }
+          }
+      }
+
+    if(mfsidx == -1)
+      return (errno=ENOENT,-1);
+
+    path = basepaths[mfsidx];
+
+    return 0;
+  }
 };

src/fs.hpp

@@ -27,103 +27,32 @@
 
 #include <string>
 #include <vector>
-#include <map>
-
-#include "path.hpp"
 
 namespace fs
 {
   using std::size_t;
   using std::string;
   using std::vector;
-  using std::map;
-
-  namespace path
-  {
-    string dirname(const string &path);
-    string basename(const string &path);
-
-    bool is_empty(const string &path);
-
-    bool exists(vector<string>::const_iterator  begin,
-                vector<string>::const_iterator  end,
-                const string                   &fusepath);
-    bool exists(const vector<string>           &srcmounts,
-                const string                   &fusepath);
-
-    inline
-    string
-    make(const string &base,
-         const string &suffix)
-    {
-      return base + suffix;
-    }
-
-    inline
-    void
-    make(const string &base,
-         const string &suffix,
-         string       &output)
-    {
-      output = base + suffix;
-    }
-
-    inline
-    void
-    append(string       &base,
-           const string &suffix)
-    {
-      base += suffix;
-    }
-  }
 
   void findallfiles(const vector<string> &srcmounts,
                     const string         &fusepath,
                     vector<string>       &paths);
 
-  int clonepath(const string &srcfrom,
-                const string &srcto,
-                const string &relative);
-
-  int listxattr(const string   &path,
-                vector<char>   &attrs);
-  int listxattr(const string   &path,
-                string         &attrs);
-  int listxattr(const string   &path,
-                vector<string> &attrs);
-
-  int getxattr(const string &path,
-               const string &attr,
-               vector<char> &value);
-  int getxattr(const string &path,
-               const string &attr,
-               string       &value);
-
-  int getxattrs(const string       &path,
-                map<string,string> &attrs);
-
-  int setxattr(const string &path,
-               const string &key,
-               const string &value,
-               const int     flags);
-  int setxattr(const int     fd,
-               const string &key,
-               const string &value,
-               const int     flags);
-
-  int setxattrs(const string             &path,
-                const map<string,string> &attrs);
-
-  int copyxattrs(const string &from,
-                 const string &to);
-
-  int copyattr(const string &from,
-               const string &to);
+  int findonfs(const vector<string> &srcmounts,
+               const string         &fusepath,
+               const int             fd,
+               string               &basepath);
 
   void glob(const vector<string> &patterns,
             vector<string>       &strs);
 
   void realpathize(vector<string> &strs);
+
+  int getfl(const int fd);
+
+  int mfs(const vector<string> &srcs,
+          const size_t          minfreespace,
+          string               &path);
 };
 
 #endif // __FS_HPP__

src/fs_attr.cpp

@@ -0,0 +1,135 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2015 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+
+using std::string;
+
+namespace fs
+{
+  namespace attr
+  {
+    static
+    int
+    get_fs_ioc_flags(const int  fd,
+                     int       &flags)
+    {
+      return ::ioctl(fd,FS_IOC_GETFLAGS,&flags);
+    }
+
+    static
+    int
+    get_fs_ioc_flags(const string &file,
+                     int          &flags)
+    {
+      int fd;
+      int rv;
+      const int openflags = O_RDONLY|O_NONBLOCK;
+
+      fd = ::open(file.c_str(),openflags);
+      if(fd == -1)
+        return -1;
+
+      rv = get_fs_ioc_flags(fd,flags);
+      if(rv == -1)
+        {
+          int error = errno;
+          ::close(fd);
+          errno = error;
+          return -1;
+        }
+
+      return ::close(fd);
+    }
+
+    static
+    int
+    set_fs_ioc_flags(const int fd,
+                     const int flags)
+    {
+      return ::ioctl(fd,FS_IOC_SETFLAGS,&flags);
+    }
+
+    static
+    int
+    set_fs_ioc_flags(const string &file,
+                     const int     flags)
+    {
+      int fd;
+      int rv;
+      const int openflags = O_RDONLY|O_NONBLOCK;
+
+      fd = ::open(file.c_str(),openflags);
+      if(fd == -1)
+        return -1;
+
+      rv = set_fs_ioc_flags(fd,flags);
+      if(rv == -1)
+        {
+          int error = errno;
+          ::close(fd);
+          errno = error;
+          return -1;
+        }
+
+      return ::close(fd);
+    }
+
+    int
+    copy(const int fdin,
+         const int fdout)
+    {
+      int rv;
+      int flags;
+
+      rv = get_fs_ioc_flags(fdin,flags);
+      if(rv == -1)
+        return -1;
+
+      return set_fs_ioc_flags(fdout,flags);
+    }
+
+    int
+    copy(const string &from,
+         const string &to)
+    {
+      int rv;
+      int flags;
+
+      rv = get_fs_ioc_flags(from,flags);
+      if(rv == -1)
+        return -1;
+
+      return set_fs_ioc_flags(to,flags);
+    }
+  }
+}

src/fs_attr.hpp

@@ -0,0 +1,43 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#ifndef __FS_ATTR_HPP__
+#define __FS_ATTR_HPP__
+
+#include <string>
+
+namespace fs
+{
+  namespace attr
+  {
+    using std::string;
+
+    int copy(const int fdin,
+             const int fdout);
+    int copy(const string &from,
+             const string &to);
+  }
+}
+
+#endif // __FS_ATTR_HPP__

src/fs_clonefile.cpp

@@ -0,0 +1,231 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2015 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifdef __linux__
+#include <sys/sendfile.h>
+#endif
+
+#include <string>
+#include <vector>
+
+#include "fs_attr.hpp"
+#include "fs_xattr.hpp"
+
+using std::string;
+using std::vector;
+
+namespace fs
+{
+  static
+  ssize_t
+  sendfile(const int    fdin,
+           const int    fdout,
+           const size_t count)
+  {
+#if defined __linux__
+    off_t offset = 0;
+    return ::sendfile(fdout,fdin,&offset,count);
+#else
+    return (errno=EINVAL,-1);
+#endif
+  }
+
+  int
+  writen(const int     fd,
+         const char   *buf,
+         const size_t  count)
+  {
+    size_t nleft;
+    ssize_t nwritten;
+
+    nleft = count;
+    while(nleft > 0)
+      {
+        nwritten = ::write(fd,buf,nleft);
+        if(nwritten == -1)
+          {
+            if(errno == EINTR)
+              continue;
+            return -1;
+          }
+
+        nleft -= nwritten;
+        buf += nwritten;
+      }
+
+    return count;
+  }
+
+  static
+  int
+  copyfile_rw(const int    fdin,
+              const int    fdout,
+              const size_t count,
+              const size_t blocksize)
+  {
+    ssize_t nr;
+    ssize_t nw;
+    ssize_t bufsize;
+    size_t  totalwritten;
+    vector<char> buf;
+
+    bufsize = (blocksize * 16);
+    buf.resize(bufsize);
+
+    totalwritten = 0;
+    while(totalwritten < count)
+      {
+        nr = ::read(fdin,&buf[0],bufsize);
+        if(nr == -1)
+          {
+            if(errno == EINTR)
+              continue;
+            else
+              return -1;
+          }
+
+        nw = writen(fdout,&buf[0],nr);
+        if(nw == -1)
+          return -1;
+
+        totalwritten += nw;
+      }
+
+    return count;
+  }
+
+  static
+  int
+  copydata(const int    fdin,
+           const int    fdout,
+           const size_t count,
+           const size_t blocksize)
+  {
+    int rv;
+
+    ::posix_fadvise(fdin,0,count,POSIX_FADV_WILLNEED);
+    ::posix_fadvise(fdin,0,count,POSIX_FADV_SEQUENTIAL);
+
+    ::posix_fallocate(fdout,0,count);
+
+    rv = fs::sendfile(fdin,fdout,count);
+    if((rv == -1) && ((errno == EINVAL) || (errno == ENOSYS)))
+      return fs::copyfile_rw(fdin,fdout,count,blocksize);
+
+    return rv;
+  }
+
+  static
+  bool
+  ignorable_error(const int err)
+  {
+    switch(err)
+      {
+      case ENOTTY:
+      case ENOTSUP:
+#if ENOTSUP != EOPNOTSUPP
+      case EOPNOTSUPP:
+#endif
+        return true;
+      }
+
+    return false;
+  }
+
+  int
+  clonefile(const int fdin,
+            const int fdout)
+  {
+    int rv;
+    struct stat stin;
+
+    rv = ::fstat(fdin,&stin);
+    if(rv == -1)
+      return -1;
+
+    rv = copydata(fdin,fdout,stin.st_size,stin.st_blksize);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::attr::copy(fdin,fdout);
+    if(rv == -1 && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::xattr::copy(fdin,fdout);
+    if(rv == -1 && !ignorable_error(errno))
+      return -1;
+
+    rv = ::fchown(fdout,stin.st_uid,stin.st_gid);
+    if(rv == -1)
+      return -1;
+
+    rv = ::fchmod(fdout,stin.st_mode);
+    if(rv == -1)
+      return -1;
+
+    struct timespec times[2];
+    times[0] = stin.st_atim;
+    times[1] = stin.st_mtim;
+    rv = ::futimens(fdout,times);
+    if(rv == -1)
+      return -1;
+
+    return 0;
+  }
+
+  int
+  clonefile(const string &in,
+            const string &out)
+  {
+    int rv;
+    int fdin;
+    int fdout;
+    int error;
+
+    fdin = ::open(in.c_str(),O_RDONLY|O_NOFOLLOW);
+    if(fdin == -1)
+      return -1;
+
+    const int flags = O_CREAT|O_LARGEFILE|O_NOATIME|O_NOFOLLOW|O_TRUNC|O_WRONLY;
+    const int mode  = S_IWUSR;
+    fdout = ::open(out.c_str(),flags,mode);
+    if(fdout == -1)
+      return -1;
+
+    rv = fs::clonefile(fdin,fdout);
+    error = errno;
+
+    ::close(fdin);
+    ::close(fdout);
+
+    errno = error;
+    return rv;
+  }
+}

src/fs_clonefile.hpp

@@ -0,0 +1,33 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+*/
+
+#include <string>
+
+namespace fs
+{
+  int clonefile(const int fdin,
+                const int fdout);
+  int clonefile(const std::string &from,
+                const std::string &to);
+}

src/fs_clonepath.cpp

@@ -0,0 +1,117 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2015 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <string>
+
+#include "fs_path.hpp"
+#include "fs_attr.hpp"
+#include "fs_xattr.hpp"
+
+using std::string;
+
+namespace fs
+{
+  static
+  bool
+  ignorable_error(const int err)
+  {
+    switch(err)
+      {
+      case ENOTTY:
+      case ENOTSUP:
+#if ENOTSUP != EOPNOTSUPP
+      case EOPNOTSUPP:
+#endif
+        return true;
+      }
+
+    return false;
+  }
+
+  int
+  clonepath(const string &fromsrc,
+            const string &tosrc,
+            const string &relative)
+  {
+    int         rv;
+    struct stat st;
+    string      topath;
+    string      frompath;
+    string      dirname;
+
+    dirname = fs::path::dirname(relative);
+    if(!dirname.empty())
+      {
+        rv = clonepath(fromsrc,tosrc,dirname);
+        if(rv == -1)
+          return -1;
+      }
+
+    fs::path::make(fromsrc,relative,frompath);
+    rv = ::stat(frompath.c_str(),&st);
+    if(rv == -1)
+      return -1;
+    else if(!S_ISDIR(st.st_mode))
+      return (errno = ENOTDIR,-1);
+
+    fs::path::make(tosrc,relative,topath);
+    rv = ::mkdir(topath.c_str(),st.st_mode);
+    if(rv == -1)
+      {
+        if(errno != EEXIST)
+          return -1;
+
+        rv = ::chmod(topath.c_str(),st.st_mode);
+        if(rv == -1)
+          return -1;
+      }
+
+    // It may not support it... it's fine...
+    rv = fs::attr::copy(frompath,topath);
+    if(rv == -1 && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::xattr::copy(frompath,topath);
+    if(rv == -1 && !ignorable_error(errno))
+      return -1;
+
+    rv = ::chown(topath.c_str(),st.st_uid,st.st_gid);
+    if(rv == -1)
+      return -1;
+
+    struct timespec times[2];
+    times[0] = st.st_atim;
+    times[1] = st.st_mtim;
+    rv = ::utimensat(-1,topath.c_str(),times,0);
+    if(rv == -1)
+      return -1;
+
+    return 0;
+  }
+}

src/fs_clonepath.hpp

@@ -0,0 +1,32 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+*/
+
+#include <string>
+
+namespace fs
+{
+  int clonepath(const std::string &from,
+                const std::string &to,
+                const std::string &relative);
+}

src/fs_movefile.cpp

@@ -0,0 +1,117 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <string>
+#include <vector>
+
+#include "fs.hpp"
+#include "fs_path.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_clonefile.hpp"
+
+using std::string;
+using std::vector;
+
+namespace fs
+{
+  int
+  movefile(const vector<string> &basepaths,
+           const char           *fusepath,
+           const size_t          additional_size,
+           int                  &origfd)
+  {
+    int rv;
+    int fdin;
+    int fdout;
+    int fdin_flags;
+    string fusedir;
+    string fdin_path;
+    string fdout_path;
+    struct stat fdin_st;
+
+    fdin = origfd;
+
+    rv = fstat(fdin,&fdin_st);
+    if(rv == -1)
+      return -1;
+
+    fdin_flags = fs::getfl(fdin);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::findonfs(basepaths,fusepath,fdin,fdin_path);
+    if(rv == -1)
+      return -1;
+
+    fdin_st.st_size += additional_size;
+    rv = fs::mfs(basepaths,fdin_st.st_size,fdout_path);
+    if(rv == -1)
+      return -1;
+
+    fusedir = fs::path::dirname(fusepath);
+    rv = fs::clonepath(fdin_path,fdout_path,fusedir);
+    if(rv == -1)
+      return -1;
+
+    fs::path::append(fdin_path,fusepath);
+    fdin = ::open(fdin_path.c_str(),O_RDONLY);
+    if(fdin == -1)
+      return -1;
+
+    fs::path::append(fdout_path,fusepath);
+    fdout = ::open(fdout_path.c_str(),fdin_flags|O_CREAT,fdin_st.st_mode);
+    if(fdout == -1)
+      return -1;
+
+    rv = fs::clonefile(fdin,fdout);
+    if(rv == -1)
+      {
+        ::close(fdin);
+        ::close(fdout);
+        ::unlink(fdout_path.c_str());
+        return -1;
+      }
+
+    rv = ::unlink(fdin_path.c_str());
+    if(rv == -1)
+      {
+        ::close(fdin);
+        ::close(fdout);
+        ::unlink(fdout_path.c_str());
+        return -1;
+      }
+
+    ::close(fdin);
+    ::close(origfd);
+
+    origfd = fdout;
+
+    return 0;
+  }
+}

src/path.hpp → src/fs_movefile.hpp

@@ -22,34 +22,19 @@
    THE SOFTWARE.
 */
 
-#ifndef __PATH_HPP__
-#define __PATH_HPP__
+#ifndef __FS_MOVEFILE_HPP__
+#define __FS_MOVEFILE_HPP__
 
 #include <string>
 #include <vector>
 
-struct Path
+namespace fs
 {
-  Path() {}
-
-  explicit
-  Path(const std::string &b,
-       const std::string &f)
-    : base(b),
-      full(f)
-  {}
-
-  explicit
-  Path(const char        *b,
-       const std::string &f)
-    : base(b),
-      full(f)
-  {}
-
-  std::string base;
-  std::string full;
-};
-
-typedef std::vector<Path> Paths;
-
-#endif /* __PATH_HPP__ */
+  int
+  movefile(const vector<string> &basepaths,
+           const char           *fusepath,
+           const size_t          additional_size,
+           int                  &origfd);
+}
+
+#endif

src/fs_path.cpp

@@ -0,0 +1,118 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2015 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "fs_path.hpp"
+
+using std::string;
+
+namespace fs
+{
+  namespace path
+  {
+    string
+    dirname(const string &path)
+    {
+      string parent = path;
+      string::reverse_iterator i;
+      string::reverse_iterator bi;
+
+      bi = parent.rend();
+      i  = parent.rbegin();
+      while(*i == '/' && i != bi)
+        i++;
+
+      while(*i != '/' && i != bi)
+        i++;
+
+      while(*i == '/' && i != bi)
+        i++;
+
+      parent.erase(i.base(),parent.end());
+
+      return parent;
+    }
+
+    string
+    basename(const string &path)
+    {
+      return path.substr(path.find_last_of('/')+1);
+    }
+
+    bool
+    is_empty(const string &path)
+    {
+      DIR           *dir;
+      struct dirent *de;
+
+      dir = ::opendir(path.c_str());
+      if(!dir)
+        return false;
+
+      while((de = ::readdir(dir)))
+        {
+          const char *d_name = de->d_name;
+
+          if(d_name[0] == '.'     &&
+             ((d_name[1] == '\0') ||
+              (d_name[1] == '.' && d_name[2] == '\0')))
+            continue;
+
+          ::closedir(dir);
+
+          return false;
+        }
+
+      ::closedir(dir);
+
+      return true;
+    }
+
+    bool
+    exists(const vector<string> &paths,
+           const string         &fusepath)
+    {
+      for(size_t i = 0, ei = paths.size(); i != ei; i++)
+        {
+          int rv;
+          string path;
+          struct stat st;
+
+          fs::path::make(paths[i],fusepath,path);
+
+          rv  = ::lstat(path.c_str(),&st);
+          if(rv == 0)
+            return true;
+        }
+
+      return false;
+    }
+  }
+}

src/fs_path.hpp

@@ -0,0 +1,76 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#ifndef __FS_PATH_HPP__
+#define __FS_PATH_HPP__
+
+#include <string>
+#include <vector>
+
+namespace fs
+{
+  namespace path
+  {
+    using std::string;
+    using std::vector;
+
+    string dirname(const string &path);
+    string basename(const string &path);
+
+    bool is_empty(const string &path);
+
+    bool exists(vector<string>::const_iterator  begin,
+                vector<string>::const_iterator  end,
+                const string                   &fusepath);
+    bool exists(const vector<string>           &srcmounts,
+                const string                   &fusepath);
+
+    inline
+    string
+    make(const string &base,
+         const string &suffix)
+    {
+      return base + suffix;
+    }
+
+    inline
+    void
+    make(const string &base,
+         const string &suffix,
+         string       &output)
+    {
+      output = base + suffix;
+    }
+
+    inline
+    void
+    append(string       &base,
+           const string &suffix)
+    {
+      base += suffix;
+    }
+  }
+};
+
+#endif // __FS_PATH_HPP__

src/fs_xattr.cpp

@@ -0,0 +1,399 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <attr/xattr.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+#include <map>
+#include <sstream>
+
+#include "str.hpp"
+#include "xattr.hpp"
+
+using std::string;
+using std::vector;
+using std::map;
+using std::istringstream;
+
+namespace fs
+{
+  namespace xattr
+  {
+    int
+    list(const int     fd,
+         vector<char> &attrs)
+    {
+#ifndef WITHOUT_XATTR
+      ssize_t rv;
+      ssize_t size;
+
+      rv    = -1;
+      errno = ERANGE;
+      while(rv == -1 && errno == ERANGE)
+        {
+          size = ::flistxattr(fd,NULL,0);
+          attrs.resize(size);
+          if(size == 0)
+            return 0;
+          rv = ::flistxattr(fd,&attrs[0],size);
+        }
+
+      return rv;
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    list(const string &path,
+         vector<char> &attrs)
+    {
+#ifndef WITHOUT_XATTR
+      int rv;
+      int size;
+
+      rv    = -1;
+      errno = ERANGE;
+      while(rv == -1 && errno == ERANGE)
+        {
+          size = ::listxattr(path.c_str(),NULL,0);
+          attrs.resize(size);
+          if(size == 0)
+            return 0;
+          rv = ::listxattr(path.c_str(),&attrs[0],size);
+        }
+
+      return rv;
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    list(const int        fd,
+          vector<string> &attrvector)
+    {
+      int rv;
+      vector<char> attrs;
+
+      rv = list(fd,attrs);
+      if(rv != -1)
+        {
+          string tmp(attrs.begin(),attrs.end());
+          str::split(attrvector,tmp,'\0');
+        }
+
+      return rv;
+    }
+
+    int
+    list(const string   &path,
+         vector<string> &attrvector)
+    {
+      int rv;
+      vector<char> attrs;
+
+      rv = list(path,attrs);
+      if(rv != -1)
+        {
+          string tmp(attrs.begin(),attrs.end());
+          str::split(attrvector,tmp,'\0');
+        }
+
+      return rv;
+    }
+
+    int
+    list(const int  fd,
+          string   &attrstr)
+    {
+      int rv;
+      vector<char> attrs;
+
+      rv = list(fd,attrs);
+      if(rv != -1)
+        attrstr = string(attrs.begin(),attrs.end());
+
+      return rv;
+    }
+
+    int
+    list(const string &path,
+         string       &attrstr)
+    {
+      int rv;
+      vector<char> attrs;
+
+      rv = list(path,attrs);
+      if(rv != -1)
+        attrstr = string(attrs.begin(),attrs.end());
+
+      return rv;
+    }
+
+    int
+    get(const int     fd,
+        const string &attr,
+        vector<char> &value)
+    {
+#ifndef WITHOUT_XATTR
+      int rv;
+      int size;
+
+      rv    = -1;
+      errno = ERANGE;
+      while(rv == -1 && errno == ERANGE)
+        {
+          size = ::fgetxattr(fd,attr.c_str(),NULL,0);
+          value.resize(size);
+          if(size == 0)
+            return 0;
+          rv = ::fgetxattr(fd,attr.c_str(),&value[0],size);
+        }
+
+      return rv;
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    get(const string &path,
+        const string &attr,
+        vector<char> &value)
+    {
+#ifndef WITHOUT_XATTR
+      int rv;
+      int size;
+
+      rv    = -1;
+      errno = ERANGE;
+      while(rv == -1 && errno == ERANGE)
+        {
+          size = ::getxattr(path.c_str(),attr.c_str(),NULL,0);
+          value.resize(size);
+          if(size == 0)
+            return 0;
+          rv = ::getxattr(path.c_str(),attr.c_str(),&value[0],size);
+        }
+
+      return rv;
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    get(const int     fd,
+        const string &attr,
+        string       &value)
+    {
+      int          rv;
+      vector<char> tmpvalue;
+
+      rv = get(fd,attr,tmpvalue);
+      if(rv != -1)
+        value = string(tmpvalue.begin(),tmpvalue.end());
+
+      return rv;
+    }
+
+    int
+    get(const string &path,
+        const string &attr,
+        string       &value)
+    {
+      int          rv;
+      vector<char> tmpvalue;
+
+      rv = get(path,attr,tmpvalue);
+      if(rv != -1)
+        value = string(tmpvalue.begin(),tmpvalue.end());
+
+      return rv;
+    }
+
+    int
+    get(const int           fd,
+        map<string,string> &attrs)
+    {
+      int rv;
+      string attrstr;
+
+      rv = list(fd,attrstr);
+      if(rv == -1)
+        return -1;
+
+      {
+        string key;
+        istringstream ss(attrstr);
+
+        while(getline(ss,key,'\0'))
+          {
+            string value;
+
+            rv = get(fd,key,value);
+            if(rv != -1)
+              attrs[key] = value;
+          }
+      }
+
+      return 0;
+    }
+
+    int
+    get(const string       &path,
+        map<string,string> &attrs)
+    {
+      int rv;
+      string attrstr;
+
+      rv = list(path,attrstr);
+      if(rv == -1)
+        return -1;
+
+      {
+        string key;
+        istringstream ss(attrstr);
+
+        while(getline(ss,key,'\0'))
+          {
+            string value;
+
+            rv = get(path,key,value);
+            if(rv != -1)
+              attrs[key] = value;
+          }
+      }
+
+      return 0;
+    }
+
+    int
+    set(const int     fd,
+        const string &key,
+        const string &value,
+        const int     flags)
+    {
+#ifndef WITHOUT_XATTR
+      return ::fsetxattr(fd,
+                         key.c_str(),
+                         value.data(),
+                         value.size(),
+                         flags);
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    set(const string &path,
+        const string &key,
+        const string &value,
+        const int     flags)
+    {
+#ifndef WITHOUT_XATTR
+      return ::setxattr(path.c_str(),
+                        key.c_str(),
+                        value.data(),
+                        value.size(),
+                        flags);
+#else
+      errno = ENOTSUP;
+      return -1;
+#endif
+    }
+
+    int
+    set(const int                 fd,
+        const map<string,string> &attrs)
+    {
+      int rv;
+
+      for(map<string,string>::const_iterator
+            i = attrs.begin(), ei = attrs.end(); i != ei; ++i)
+        {
+          rv = set(fd,i->first,i->second,0);
+          if(rv == -1)
+            return -1;
+        }
+
+      return 0;
+    }
+
+    int
+    set(const string             &path,
+        const map<string,string> &attrs)
+    {
+      int fd;
+
+      fd = ::open(path.c_str(),O_RDONLY|O_NONBLOCK);
+      if(fd == -1)
+        return -1;
+
+      set(fd,attrs);
+
+      return ::close(fd);
+    }
+
+    int
+    copy(const int fdin,
+         const int fdout)
+    {
+      int rv;
+      map<string,string> attrs;
+
+      rv = get(fdin,attrs);
+      if(rv == -1)
+        return -1;
+
+      return set(fdout,attrs);
+    }
+
+    int
+    copy(const string &from,
+         const string &to)
+    {
+      int rv;
+      map<string,string> attrs;
+
+      rv = get(from,attrs);
+      if(rv == -1)
+        return -1;
+
+      return set(to,attrs);
+    }
+  }
+}

src/fs_xattr.hpp

@@ -0,0 +1,78 @@
+/*
+  The MIT License (MIT)
+
+  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#ifndef __FS_XATTR_HPP__
+#define __FS_XATTR_HPP__
+
+#include <string>
+#include <vector>
+#include <map>
+
+namespace fs
+{
+  namespace xattr
+  {
+    using std::size_t;
+    using std::string;
+    using std::vector;
+    using std::map;
+
+  
+    int list(const string   &path,
+             vector<char>   &attrs);
+    int list(const string   &path,
+             string         &attrs);
+    int list(const string   &path,
+             vector<string> &attrs);
+
+    int get(const string &path,
+            const string &attr,
+            vector<char> &value);
+    int get(const string &path,
+            const string &attr,
+            string       &value);
+
+    int get(const string       &path,
+            map<string,string> &attrs);
+
+    int set(const string &path,
+            const string &key,
+            const string &value,
+            const int     flags);
+    int set(const int     fd,
+            const string &key,
+            const string &value,
+            const int     flags);
+
+    int set(const string             &path,
+            const map<string,string> &attrs);
+
+    int copy(const int fdin,
+             const int fdout);
+    int copy(const string &from,
+             const string &to);
+  }
+}
+
+#endif // __FS_HPP__

src/fsync.cpp

@@ -34,6 +34,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _fsync(const int fd,
@@ -57,7 +59,9 @@ namespace mergerfs
           int             isdatasync,
           fuse_file_info *ffi)
     {
-      return _fsync(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _fsync(fi->fd,
                     isdatasync);
     }
   }

src/ftruncate.cpp

@@ -28,6 +28,8 @@
 #include <sys/types.h>
 #include <errno.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _ftruncate(const int   fd,
@@ -49,7 +51,9 @@ namespace mergerfs
               off_t           size,
               fuse_file_info *ffi)
     {
-      return _ftruncate(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _ftruncate(fi->fd,
                         size);
     }
   }

src/getattr.cpp

@@ -33,9 +33,9 @@
 #include <errno.h>
 
 #include "config.hpp"
-#include "fs.hpp"
-#include "ugid.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/getxattr.cpp

@@ -35,12 +35,12 @@
 #include <string.h>
 
 #include "config.hpp"
-#include "fs.hpp"
-#include "ugid.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
-#include "xattr.hpp"
 #include "str.hpp"
+#include "ugid.hpp"
 #include "version.hpp"
+#include "xattr.hpp"
 
 using std::string;
 using std::vector;
@@ -123,6 +123,14 @@ _getxattr_controlfile_minfreespace(const Config &config,
   attrvalue = buf;
 }
 
+static
+void
+_getxattr_controlfile_moveonenospc(const Config &config,
+                                   string       &attrvalue)
+{
+  attrvalue = (config.moveonenospc ? "true" : "false");
+}
+
 static
 void
 _getxattr_controlfile_policies(const Config &config,
@@ -164,6 +172,8 @@ _getxattr_controlfile(const Config &config,
         _getxattr_controlfile_srcmounts(config,attrvalue);
       else if(attr[2] == "minfreespace")
         _getxattr_controlfile_minfreespace(config,attrvalue);
+      else if(attr[2] == "moveonenospc")
+        _getxattr_controlfile_moveonenospc(config,attrvalue);
       else if(attr[2] == "policies")
         _getxattr_controlfile_policies(config,attrvalue);
       else if(attr[2] == "version")

src/ioctl.cpp

@@ -32,8 +32,10 @@
 #include <linux/fs.h>
 
 #include "config.hpp"
-#include "ugid.hpp"
+#include "fileinfo.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
@@ -130,8 +132,9 @@ namespace mergerfs
                           cmd,
                           data);
 #endif
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
 
-      return _ioctl(ffi->fh,
+      return _ioctl(fi->fd,
                     cmd,
                     data);
     }

src/link.cpp

@@ -31,9 +31,10 @@
 #include <unistd.h>
 
 #include "config.hpp"
-#include "fs.hpp"
-#include "ugid.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/listxattr.cpp

@@ -31,13 +31,13 @@
 #include <errno.h>
 #include <string.h>
 
-#include "config.hpp"
+#include "buildvector.hpp"
 #include "category.hpp"
-#include "fs.hpp"
-#include "ugid.hpp"
+#include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 #include "xattr.hpp"
-#include "buildvector.hpp"
 
 using std::string;
 using std::vector;
@@ -53,6 +53,7 @@ _listxattr_controlfile(char         *list,
     buildvector<string>
     ("user.mergerfs.srcmounts")
     ("user.mergerfs.minfreespace")
+    ("user.mergerfs.moveonenospc")
     ("user.mergerfs.policies")
     ("user.mergerfs.version");
 

src/mergerfs.cpp

@@ -31,9 +31,9 @@
 #include "mergerfs.hpp"
 #include "option_parser.hpp"
 #include "resources.hpp"
-#include "fs.hpp"
+#include "fs_path.hpp"
 
-#include "clonepath.hpp"
+#include "clone.hpp"
 
 #include "access.hpp"
 #include "chmod.hpp"
@@ -195,8 +195,8 @@ main(int    argc,
   std::string appname;
 
   appname = local::getappname(argc,argv);
-  if(appname == "clonepath")
-    return clonepath::main(argc,argv);
+  if(appname == "clone")
+    return clonetool::main(argc,argv);
 
   return mergerfs::main(argc,argv);
 }

src/mkdir.cpp

@@ -31,10 +31,11 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/mknod.cpp

@@ -33,10 +33,11 @@
 #include <fcntl.h>
 #include <unistd.h>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/open.cpp

@@ -31,10 +31,11 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fileinfo.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
@@ -63,7 +64,7 @@ _open(Policy::Func::Search  searchFunc,
   if(fd == -1)
     return -errno;
 
-  fh = fd;
+  fh = reinterpret_cast<uint64_t>(new FileInfo(fd));
 
   return 0;
 }
@@ -74,7 +75,7 @@ namespace mergerfs
   {
     int
     open(const char     *fusepath,
-         fuse_file_info *fileinfo)
+         fuse_file_info *ffi)
     {
       const fuse_context      *fc     = fuse_get_context();
       const Config            &config = Config::get(fc);
@@ -85,8 +86,8 @@ namespace mergerfs
                    config.srcmounts,
                    config.minfreespace,
                    fusepath,
-                   fileinfo->flags,
-                   fileinfo->fh);
+                   ffi->flags,
+                   ffi->fh);
     }
   }
 }

src/open.hpp

@@ -30,6 +30,6 @@ namespace mergerfs
   {
     int
     open(const char     *fusepath,
-         fuse_file_info *fileinfo);
+         fuse_file_info *ffi);
   }
 }

src/option_parser.cpp

@@ -117,6 +117,21 @@ parse_and_process_minfreespace(const std::string &value,
   return 0;
 }
 
+static
+int
+parse_and_process_moveonenospc(const std::string &value,
+                               bool              &moveonenospc)
+{
+  if(value == "false")
+    moveonenospc = false;
+  else if(value == "true")
+    moveonenospc = true;
+  else
+    return 1;
+
+  return 0;
+}
+
 static
 int
 parse_and_process_arg(Config            &config,
@@ -153,6 +168,8 @@ parse_and_process_kv_arg(Config            &config,
     {
       if(key == "minfreespace")
         rv = parse_and_process_minfreespace(value,config.minfreespace);
+      else if(key == "moveonenospc")
+        rv = parse_and_process_moveonenospc(value,config.moveonenospc);
     }
 
   if(rv == -1)

src/policy.hpp

@@ -29,7 +29,6 @@
 #include <vector>
 #include <map>
 
-#include "path.hpp"
 #include "fs.hpp"
 #include "category.hpp"
 

src/policy_all.cpp

@@ -30,6 +30,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -50,7 +51,7 @@ _all(const vector<string> &basepaths,
     {
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::lstat(fullpath.c_str(),&st);
       if(rv == 0)

src/policy_epmfs.cpp

@@ -31,6 +31,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;

src/policy_ff.cpp

@@ -30,7 +30,7 @@
 #include <string>
 #include <vector>
 
-#include "path.hpp"
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;

src/policy_ffwp.cpp

@@ -30,6 +30,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -51,7 +52,7 @@ _ffwp(const vector<string> &basepaths,
       string        fullpath;
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::lstat(fullpath.c_str(),&st);
       if(rv == 0)

src/policy_fwfs.cpp

@@ -28,6 +28,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -83,7 +84,7 @@ _fwfs(const Category::Enum::Type  type,
       struct statvfs fsstats;
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::statvfs(fullpath.c_str(),&fsstats);
       if(rv == 0)

src/policy_lfs.cpp

@@ -31,6 +31,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -99,7 +100,7 @@ _lfs(const Category::Enum::Type  type,
       struct statvfs fsstats;
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::statvfs(fullpath.c_str(),&fsstats);
       if(rv == 0)

src/policy_mfs.cpp

@@ -28,6 +28,7 @@
 #include <string>
 #include <vector>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -89,7 +90,7 @@ _mfs(const vector<string> &basepaths,
       struct statvfs fsstats;
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::statvfs(fullpath.c_str(),&fsstats);
       if(rv == 0)

src/policy_newest.cpp

@@ -31,6 +31,7 @@
 #include <vector>
 #include <limits>
 
+#include "fs_path.hpp"
 #include "policy.hpp"
 
 using std::string;
@@ -53,7 +54,7 @@ _newest(const vector<string> &basepaths,
       string fullpath;
       const string &basepath = basepaths[i];
 
-      fullpath = fs::path::make(basepath,fusepath);
+      fs::path::make(basepath,fusepath,fullpath);
 
       rv = ::lstat(fullpath.c_str(),&st);
       if(rv == 0 && st.st_mtime >= newest)

src/read.cpp

@@ -30,6 +30,8 @@
 
 #include <string>
 
+#include "fileinfo.hpp"
+
 static
 int
 _read(const int     fd,
@@ -55,7 +57,9 @@ namespace mergerfs
          off_t           offset,
          fuse_file_info *ffi)
     {
-      return _read(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _read(fi->fd,
                    buf,
                    count,
                    offset);

src/read_buf.cpp

@@ -30,6 +30,8 @@
 #include <errno.h>
 #include <string.h>
 
+#include "fileinfo.hpp"
+
 static
 int
 _read_buf(const int      fd,
@@ -65,7 +67,9 @@ namespace mergerfs
              off_t            offset,
              fuse_file_info  *ffi)
     {
-      return _read_buf(ffi->fh,
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _read_buf(fi->fd,
                        bufp,
                        size,
                        offset);

src/readdir.cpp

@@ -33,11 +33,11 @@
 #include <errno.h>
 #include <dirent.h>
 
-#include "readdir.hpp"
 #include "config.hpp"
-#include "ugid.hpp"
-#include "fs.hpp"
+#include "fs_path.hpp"
+#include "readdir.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
@@ -61,7 +61,7 @@ _readdir(const vector<string>  &srcmounts,
       DIR *dh;
       string basepath;
 
-      basepath = fs::path::make(srcmounts[i],dirname);
+      fs::path::make(srcmounts[i],dirname,basepath);
       dh = ::opendir(basepath.c_str());
       if(!dh)
         continue;

src/readlink.cpp

@@ -31,9 +31,9 @@
 #include <string>
 
 #include "config.hpp"
-#include "ugid.hpp"
-#include "fs.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/release.cpp

@@ -29,13 +29,15 @@
 
 #include <string>
 
+#include "fileinfo.hpp"
+
 static
 int
-_release(uint64_t &fh)
+_release(FileInfo *fi)
 {
-  ::close(fh);
+  ::close(fi->fd);
 
-  fh = 0;
+  delete fi;
 
   return 0;
 }
@@ -48,7 +50,9 @@ namespace mergerfs
     release(const char     *fusepath,
             fuse_file_info *ffi)
     {
-      return _release(ffi->fh);
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _release(fi);
     }
   }
 }

src/removexattr.cpp

@@ -31,9 +31,9 @@
 #include <sys/types.h>
 
 #include "config.hpp"
-#include "ugid.hpp"
-#include "fs.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 #include "xattr.hpp"
 
 using std::string;

src/rename.cpp

@@ -32,10 +32,10 @@
 #include <vector>
 #include <set>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/rmdir.cpp

@@ -29,10 +29,10 @@
 
 #include <string>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/setxattr.cpp

@@ -33,12 +33,12 @@
 #include <string.h>
 
 #include "config.hpp"
-#include "fs.hpp"
-#include "ugid.hpp"
+#include "fs_path.hpp"
+#include "num.hpp"
 #include "rwlock.hpp"
-#include "xattr.hpp"
 #include "str.hpp"
-#include "num.hpp"
+#include "ugid.hpp"
+#include "xattr.hpp"
 
 using std::string;
 using std::vector;
@@ -186,6 +186,26 @@ _setxattr_minfreespace(Config       &config,
   return 0;
 }
 
+static
+int
+_setxattr_moveonenospc(Config       &config,
+                       const string &attrval,
+                       const int     flags)
+{
+  if((flags & XATTR_CREATE) == XATTR_CREATE)
+    return -EEXIST;
+
+  if(attrval == "false")
+    config.moveonenospc = false;
+  else if(attrval == "true")
+    config.moveonenospc = true;
+  else
+    return -EINVAL;
+
+  return 0;
+}
+
+
 static
 int
 _setxattr_controlfile_func_policy(Config       &config,
@@ -248,6 +268,10 @@ _setxattr_controlfile(Config       &config,
         return _setxattr_minfreespace(config,
                                       attrval,
                                       flags);
+      else if(attr[2] == "moveonenospc")
+        return _setxattr_moveonenospc(config,
+                                      attrval,
+                                      flags);
       break;
 
     case 4:

src/symlink.cpp

@@ -29,10 +29,10 @@
 #include <unistd.h>
 #include <string>
 
-#include "fs.hpp"
 #include "config.hpp"
-#include "ugid.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/truncate.cpp

@@ -31,10 +31,10 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/unlink.cpp

@@ -30,10 +30,10 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/utimens.cpp

@@ -31,10 +31,10 @@
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
+#include "fs_path.hpp"
 #include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;

src/write.cpp

@@ -27,6 +27,12 @@
 #include <errno.h>
 #include <unistd.h>
 
+#include "config.hpp"
+#include "fileinfo.hpp"
+#include "fs_movefile.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
+
 static
 int
 _write(const int     fd,
@@ -52,10 +58,29 @@ namespace mergerfs
           off_t           offset,
           fuse_file_info *ffi)
     {
-      return _write(ffi->fh,
-                    buf,
-                    count,
-                    offset);
+      int rv;
+      FileInfo* fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      rv = _write(fi->fd,buf,count,offset);
+      if(rv == -ENOSPC)
+        {
+          const fuse_context *fc     = fuse_get_context();
+          const Config       &config = Config::get(fc);
+
+          if(config.moveonenospc)
+            {
+              const ugid::Set         ugid(0,0);
+              const rwlock::ReadGuard readlock(&config.srcmountslock);
+
+              rv = fs::movefile(config.srcmounts,fusepath,count,fi->fd);
+              if(rv == -1)
+                return -ENOSPC;
+
+              rv = _write(fi->fd,buf,count,offset);
+            }
+        }
+
+      return rv;
     }
   }
 }

src/write_buf.cpp

@@ -25,11 +25,25 @@
 #if WRITE_BUF
 
 #include <fuse.h>
-
 #include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
 
+#include "config.hpp"
+#include "fileinfo.hpp"
+#include "fs_movefile.hpp"
+#include "policy.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
 #include "write.hpp"
 
+using std::string;
+using std::vector;
+using namespace mergerfs;
+
 static
 int
 _write_buf(const int    fd,
@@ -58,9 +72,31 @@ namespace mergerfs
               off_t           offset,
               fuse_file_info *ffi)
     {
-      return _write_buf(ffi->fh,
-                        *src,
-                        offset);
+      int rv;
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      rv = _write_buf(fi->fd,*src,offset);
+      if(rv == -ENOSPC)
+       {
+          const fuse_context *fc     = fuse_get_context();
+          const Config       &config = Config::get(fc);
+
+          if(config.moveonenospc)
+            {
+              size_t extra;
+              const ugid::Set         ugid(0,0);
+              const rwlock::ReadGuard readlock(&config.srcmountslock);
+
+              extra = fuse_buf_size(src);
+              rv = fs::movefile(config.srcmounts,fusepath,extra,fi->fd);
+              if(rv == -1)
+                return -ENOSPC;
+
+              rv = _write_buf(fi->fd,*src,offset);
+            }
+        }
+
+      return rv;
     }
   }
 }