create minfreespace option. closes #71

src/access.cpp

@@ -47,13 +47,14 @@ static
 int
 _access(const fs::find::Func  searchFunc,
         const vector<string> &srcmounts,
+        const size_t          minfreespace,
         const string         &fusepath,
         const int             mask)
 {
   int rv;
   fs::Paths paths;
 
-  rv = searchFunc(srcmounts,fusepath,paths,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -77,6 +78,7 @@ namespace mergerfs
 
       return _access(*config.access,
                      config.srcmounts,
+                     config.minfreespace,
                      fusepath,
                      mask);
     }

src/chmod.cpp

@@ -41,6 +41,7 @@ static
 int
 _chmod(const fs::find::Func  actionFunc,
        const vector<string> &srcmounts,
+       const size_t          minfreespace,
        const string         &fusepath,
        const mode_t          mode)
 {
@@ -48,7 +49,7 @@ _chmod(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -73,12 +74,13 @@ namespace mergerfs
           mode_t      mode)
     {
       const struct fuse_context *fc     = fuse_get_context();
-      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
       const config::Config      &config = config::get();
+      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
       const rwlock::ReadGuard    readlock(&config.srcmountslock);
 
       return _chmod(*config.chmod,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     mode);
     }

src/chown.cpp

@@ -42,6 +42,7 @@ static
 int
 _chown(const fs::find::Func  actionFunc,
        const vector<string> &srcmounts,
+       const size_t          minfreespace,
        const string         &fusepath,
        const uid_t           uid,
        const gid_t           gid)
@@ -50,7 +51,7 @@ _chown(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -82,6 +83,7 @@ namespace mergerfs
 
       return _chown(*config.chown,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     uid,
                     gid);

src/config.cpp

@@ -46,6 +46,7 @@ namespace mergerfs
       : destmount(),
         srcmounts(),
         srcmountslock(),
+        minfreespace(UINT32_MAX),
         POLICYINIT(access),
         POLICYINIT(chmod),
         POLICYINIT(chown),

src/config.hpp

@@ -28,6 +28,7 @@
 #include <fuse.h>
 
 #include <sys/stat.h>
+#include <stdint.h>
 
 #include <string>
 #include <vector>
@@ -54,6 +55,7 @@ namespace mergerfs
       std::string              destmount;
       std::vector<std::string> srcmounts;
       mutable pthread_rwlock_t srcmountslock;
+      size_t                   minfreespace;
 
     public:
       const Policy  *policies[FuseFunc::Enum::END];

src/create.cpp

@@ -46,6 +46,7 @@ int
 _create(const fs::find::Func  searchFunc,
         const fs::find::Func  createFunc,
         const vector<string> &srcmounts,
+        const size_t          minfreespace,
         const string         &fusepath,
         const mode_t          mode,
         const int             flags,
@@ -59,11 +60,11 @@ _create(const fs::find::Func  searchFunc,
   fs::Paths existingpath;
 
   dirname = fs::dirname(fusepath);
-  rv = searchFunc(srcmounts,dirname,existingpath,1);
+  rv = searchFunc(srcmounts,dirname,minfreespace,existingpath);
   if(rv == -1)
     return -errno;
 
-  rv = createFunc(srcmounts,dirname,createpath,1);
+  rv = createFunc(srcmounts,dirname,minfreespace,createpath);
   if(rv == -1)
     return -errno;
 
@@ -101,6 +102,7 @@ namespace mergerfs
       return _create(*config.getattr,
                      *config.create,
                      config.srcmounts,
+                     config.minfreespace,
                      fusepath,
                      (mode & ~fc->umask),
                      fileinfo->flags,

src/fs.cpp

@@ -520,8 +520,8 @@ namespace fs
     int
     invalid(const vector<string> &basepaths,
             const string         &fusepath,
-            Paths                &rv,
-            size_t                count)
+            const size_t          minfreespace,
+            Paths                &rv)
     {
       return (errno = EINVAL,-1);
     }
@@ -529,8 +529,8 @@ namespace fs
     int
     ff(const vector<string> &basepaths,
        const string         &fusepath,
-       Paths                &paths,
-       size_t                count)
+       const size_t          minfreespace,
+       Paths                &paths)
     {
       errno = ENOENT;
       for(vector<string>::const_iterator
@@ -558,8 +558,8 @@ namespace fs
     int
     ffwp(const vector<string> &basepaths,
          const string         &fusepath,
-         Paths                &paths,
-         size_t                count)
+         const size_t          minfreespace,
+         Paths                &paths)
     {
       Path fallback;
 
@@ -597,8 +597,8 @@ namespace fs
     int
     newest(const vector<string> &basepaths,
            const string         &fusepath,
-           Paths                &paths,
-           size_t                count)
+           const size_t          minfreespace,
+           Paths                &paths)
     {
       time_t newest;
       string npath;
@@ -635,8 +635,8 @@ namespace fs
     int
     mfs(const vector<string> &basepaths,
         const string         &fusepath,
-        Paths                &paths,
-        size_t                count)
+        const size_t          minfreespace,
+        Paths                &paths)
     {
       fsblkcnt_t mfs;
       size_t     mfsidx;
@@ -675,11 +675,11 @@ namespace fs
     int
     epmfs(const vector<string> &basepaths,
           const string         &fusepath,
-          Paths                &paths,
-          size_t                count)
+          const size_t          minfreespace,
+          Paths                &paths)
     {
-      fsblkcnt_t existingmfs = 0;
-      fsblkcnt_t generalmfs  = 0;
+      fsblkcnt_t existingmfs;
+      fsblkcnt_t generalmfs;
       string     fullpath;
       string     generalmfspath;
       string     existingmfspath;
@@ -689,6 +689,8 @@ namespace fs
       if(iter == eiter)
         return (errno = ENOENT,-1);
 
+      existingmfs = 0;
+      generalmfs  = 0;
       do
         {
           int rv;
@@ -736,8 +738,8 @@ namespace fs
     int
     all(const vector<string> &basepaths,
         const string         &fusepath,
-        Paths                &paths,
-        size_t                count)
+        const size_t          minfreespace,
+        Paths                &paths)
     {
       int rv;
       struct stat st;
@@ -745,17 +747,14 @@ namespace fs
 
       for(vector<string>::const_iterator
             iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter && count;
+          iter != eiter;
           ++iter)
         {
           fullpath = fs::make_path(*iter,fusepath);
 
           rv = ::lstat(fullpath.c_str(),&st);
           if(rv == 0)
-            {
             paths.push_back(Path(*iter,fullpath));
-              count--;
-            }
         }
 
       return paths.empty() ? (errno=ENOENT,-1) : 0;
@@ -764,20 +763,17 @@ namespace fs
     int
     rand(const vector<string> &basepaths,
          const string         &fusepath,
-         Paths                &paths,
-         size_t                count)
+         const size_t          minfreespace,
+         Paths                &paths)
     {
       int rv;
 
-      rv = all(basepaths,fusepath,paths,-1);
+      rv = all(basepaths,fusepath,minfreespace,paths);
       if(rv == -1)
         return -1;
 
       std::random_shuffle(paths.begin(),paths.end());
 
-      if(paths.size() > count)
-        paths.resize(count);
-
       return 0;
     }
   }

src/fs.hpp

@@ -39,12 +39,21 @@ namespace fs
   struct Path
   {
     Path() {}
+
+    explicit
     Path(const string &b,
          const string &f)
       : base(b),
         full(f)
     {}
 
+    explicit
+    Path(const char   *b,
+         const string &f)
+      : base(b),
+        full(f)
+    {}
+
     string base;
     string full;
   };
@@ -113,40 +122,40 @@ namespace fs
 
   namespace find
   {
-    typedef int (*Func)(const vector<string>&,const string&,Paths&,size_t);
+    typedef int (*Func)(const vector<string>&,const string&,const size_t,Paths&);
 
     int invalid(const vector<string> &basepaths,
                 const string         &fusepath,
-                Paths                &path,
-                size_t                max);
+                const size_t          minfreespace,
+                Paths                &path);
     int all(const vector<string> &basepaths,
             const string         &fusepath,
-            Paths                &path,
-            size_t                max);
+            const size_t          minfreespace,
+            Paths                &path);
     int ff(const vector<string>      &basepaths,
            const string              &fusepath,
-           Paths                     &path,
-           size_t                     max);
+           const size_t               minfreespace,
+           Paths                     &path);
     int ffwp(const vector<string>    &paths,
              const string            &fusepath,
-             Paths                   &path,
-             size_t                   max);
+             const size_t             minfreespace,
+             Paths                   &path);
     int newest(const vector<string>  &paths,
                const string          &fusepath,
-               Paths                 &path,
-               size_t                 max);
+               const size_t           minfreespace,
+               Paths                 &path);
     int mfs(const vector<string>     &paths,
             const string             &fusepath,
-            Paths                    &path,
-            size_t                    max);
+            const size_t              minfreespace,
+            Paths                    &path);
     int epmfs(const vector<string>   &paths,
               const string           &fusepath,
-              Paths                  &path,
-              size_t                  max);
+              const size_t            minfreespace,
+              Paths                  &path);
     int rand(const vector<string>    &paths,
              const string            &fusepath,
-             Paths                   &path,
-             size_t                   max);
+             const size_t             minfreespace,
+             Paths                   &path);
   }
 };
 

src/getattr.cpp

@@ -67,13 +67,14 @@ static
 int
 _getattr(const fs::find::Func  searchFunc,
          const vector<string> &srcmounts,
+         const size_t          minfreespace,
          const string         &fusepath,
          struct stat          &buf)
 {
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -101,6 +102,7 @@ namespace mergerfs
 
       return _getattr(*config.getattr,
                       config.srcmounts,
+                      config.minfreespace,
                       fusepath,
                       *st);
     }

src/getxattr.cpp

@@ -192,6 +192,7 @@ static
 int
 _getxattr(const fs::find::Func  searchFunc,
           const vector<string> &srcmounts,
+          const size_t          minfreespace,
           const string         &fusepath,
           const char           *attrname,
           char                 *buf,
@@ -201,7 +202,7 @@ _getxattr(const fs::find::Func  searchFunc,
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -240,6 +241,7 @@ namespace mergerfs
 
       return _getxattr(*config.getxattr,
                        config.srcmounts,
+                       config.minfreespace,
                        fusepath,
                        attrname,
                        buf,

src/ioctl.cpp

@@ -84,6 +84,7 @@ static
 int
 _ioctl_dir_base(const fs::find::Func  searchFunc,
                 const vector<string> &srcmounts,
+                const size_t          minfreespace,
                 const string         &fusepath,
                 const int             cmd,
                 void                 *arg,
@@ -94,7 +95,7 @@ _ioctl_dir_base(const fs::find::Func  searchFunc,
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -124,6 +125,7 @@ _ioctl_dir(const string       &fusepath,
 
   return _ioctl_dir_base(*config.getattr,
                          config.srcmounts,
+                         config.minfreespace,
                          fusepath,
                          cmd,
                          arg,

src/link.cpp

@@ -43,6 +43,7 @@ static
 int
 _single_link(const fs::find::Func  searchFunc,
              const vector<string> &srcmounts,
+             const size_t          minfreespace,
              const string         &base,
              const string         &oldpath,
              const string         &newpath)
@@ -58,7 +59,7 @@ _single_link(const fs::find::Func  searchFunc,
       fs::Paths foundpath;
 
       newpathdir = fs::dirname(newpath);
-      rv = searchFunc(srcmounts,newpathdir,foundpath,1);
+      rv = searchFunc(srcmounts,newpathdir,minfreespace,foundpath);
       if(rv == -1)
         return -1;
 
@@ -78,6 +79,7 @@ int
 _link(const fs::find::Func  searchFunc,
       const fs::find::Func  actionFunc,
       const vector<string> &srcmounts,
+      const size_t          minfreespace,
       const string         &oldpath,
       const string         &newpath)
 {
@@ -85,7 +87,7 @@ _link(const fs::find::Func  searchFunc,
   int error;
   fs::Paths oldpaths;
 
-  rv = actionFunc(srcmounts,oldpath,oldpaths,-1);
+  rv = actionFunc(srcmounts,oldpath,minfreespace,oldpaths);
   if(rv == -1)
     return -errno;
 
@@ -93,7 +95,7 @@ _link(const fs::find::Func  searchFunc,
   for(fs::Paths::const_iterator
         i = oldpaths.begin(), ei = oldpaths.end(); i != ei; ++i)
     {
-      rv = _single_link(searchFunc,srcmounts,i->base,oldpath,newpath);
+      rv = _single_link(searchFunc,srcmounts,minfreespace,i->base,oldpath,newpath);
       if(rv == -1)
         error = errno;
     }
@@ -117,6 +119,7 @@ namespace mergerfs
       return _link(*config.getattr,
                    *config.link,
                    config.srcmounts,
+                   config.minfreespace,
                    from,
                    to);
     }

src/listxattr.cpp

@@ -71,6 +71,7 @@ static
 int
 _listxattr(const fs::find::Func  searchFunc,
            const vector<string> &srcmounts,
+           const size_t          minfreespace,
            const string         &fusepath,
            char                 *list,
            const size_t          size)
@@ -79,7 +80,7 @@ _listxattr(const fs::find::Func  searchFunc,
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -103,8 +104,7 @@ namespace mergerfs
       const config::Config &config = config::get();
 
       if(fusepath == config.controlfile)
-        return _listxattr_controlfile(list,
-                                      size);
+        return _listxattr_controlfile(list,size);
 
       const struct fuse_context *fc = fuse_get_context();
       const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
@@ -112,6 +112,7 @@ namespace mergerfs
 
       return _listxattr(*config.listxattr,
                         config.srcmounts,
+                        config.minfreespace,
                         fusepath,
                         list,
                         size);

src/mkdir.cpp

@@ -44,6 +44,7 @@ int
 _mkdir(const fs::find::Func  searchFunc,
        const fs::find::Func  createFunc,
        const vector<string> &srcmounts,
+       const size_t          minfreespace,
        const string         &fusepath,
        const mode_t          mode)
 {
@@ -55,11 +56,11 @@ _mkdir(const fs::find::Func  searchFunc,
   fs::Paths existingpath;
 
   dirname = fs::dirname(fusepath);
-  rv = searchFunc(srcmounts,dirname,existingpath,1);
+  rv = searchFunc(srcmounts,dirname,minfreespace,existingpath);
   if(rv == -1)
     return -errno;
 
-  rv = createFunc(srcmounts,dirname,createpaths,-1);
+  rv = createFunc(srcmounts,dirname,minfreespace,createpaths);
   if(rv == -1)
     return -errno;
 
@@ -99,6 +100,7 @@ namespace mergerfs
       return _mkdir(*config.getattr,
                     *config.mkdir,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     (mode & ~fc->umask));
     }

src/mknod.cpp

@@ -46,6 +46,7 @@ int
 _mknod(const fs::find::Func  searchFunc,
        const fs::find::Func  createFunc,
        const vector<string> &srcmounts,
+       const size_t          minfreespace,
        const string         &fusepath,
        const mode_t          mode,
        const dev_t           dev)
@@ -58,11 +59,11 @@ _mknod(const fs::find::Func  searchFunc,
   fs::Paths existingpath;
 
   dirname = fs::dirname(fusepath);
-  rv = searchFunc(srcmounts,dirname,existingpath,1);
+  rv = searchFunc(srcmounts,dirname,minfreespace,existingpath);
   if(rv == -1)
     return -errno;
 
-  rv = createFunc(srcmounts,dirname,createpaths,-1);
+  rv = createFunc(srcmounts,dirname,minfreespace,createpaths);
   if(rv == -1)
     return -errno;
 
@@ -103,6 +104,7 @@ namespace mergerfs
       return _mknod(*config.getattr,
                     *config.mknod,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     (mode & ~fc->umask),
                     rdev);

src/open.cpp

@@ -43,6 +43,7 @@ static
 int
 _open(const fs::find::Func  searchFunc,
       const vector<string> &srcmounts,
+      const size_t          minfreespace,
       const string         &fusepath,
       const int             flags,
       uint64_t             &fh)
@@ -51,7 +52,7 @@ _open(const fs::find::Func  searchFunc,
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -79,6 +80,7 @@ namespace mergerfs
 
       return _open(*config.open,
                    config.srcmounts,
+                   config.minfreespace,
                    fusepath,
                    fileinfo->flags,
                    fileinfo->fh);

src/option_parser.cpp

@@ -27,6 +27,7 @@
 #include <stddef.h>
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include <string>
 #include <vector>
@@ -100,6 +101,38 @@ set_default_options(struct fuse_args &args)
   set_option(args,"atomic_o_trunc");
 }
 
+static
+int
+parse_and_process_minfreespace(const std::string &value,
+                               size_t            &minfreespace)
+{
+  char *endptr;
+
+  minfreespace = strtoll(value.c_str(),&endptr,10);
+  switch(*endptr)
+    {
+    case 'k':
+    case 'K':
+      minfreespace *= 1024;
+      break;
+
+    case 'm':
+    case 'M':
+      minfreespace *= (1024 * 1024);
+      break;
+
+    case 'b':
+    case 'B':
+      minfreespace *= (1024 * 1024 * 1024);
+      break;
+
+    default:
+      return 1;
+    }
+
+  return 0;
+}
+
 static
 int
 parse_and_process_arg(config::Config    &config,
@@ -121,19 +154,22 @@ parse_and_process_kv_arg(config::Config    &config,
                          const std::string &key,
                          const std::string &value)
 {
-  int rv;
+  int rv = -1;
   std::vector<std::string> keypart;
 
   str::split(keypart,key,'.');
-  if(keypart.size() != 2)
-    return 1;
-
+  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
-    rv = -1;
+    {
+      if(key == "minfreespace")
+        rv = parse_and_process_minfreespace(value,config.minfreespace);
+    }
 
   if(rv == -1)
     rv = 1;

src/readlink.cpp

@@ -43,6 +43,7 @@ static
 int
 _readlink(const fs::find::Func   searchFunc,
           const vector<string>  &srcmounts,
+          const size_t           minfreespace,
           const string          &fusepath,
           char                  *buf,
           const size_t           size)
@@ -50,7 +51,7 @@ _readlink(const fs::find::Func   searchFunc,
   int rv;
   fs::Paths path;
 
-  rv = searchFunc(srcmounts,fusepath,path,1);
+  rv = searchFunc(srcmounts,fusepath,minfreespace,path);
   if(rv == -1)
     return -errno;
 
@@ -79,6 +80,7 @@ namespace mergerfs
 
       return _readlink(*config.readlink,
                        config.srcmounts,
+                       config.minfreespace,
                        fusepath,
                        buf,
                        size);

src/removexattr.cpp

@@ -43,6 +43,7 @@ static
 int
 _removexattr(const fs::find::Func  actionFunc,
              const vector<string> &srcmounts,
+             const size_t          minfreespace,
              const string         &fusepath,
              const char           *attrname)
 {
@@ -51,7 +52,7 @@ _removexattr(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -89,6 +90,7 @@ namespace mergerfs
 
       return _removexattr(*config.removexattr,
                           config.srcmounts,
+                          config.minfreespace,
                           fusepath,
                           attrname);
     }

src/rename.cpp

@@ -43,6 +43,7 @@ static
 int
 _single_rename(const fs::find::Func  searchFunc,
                const vector<string> &srcmounts,
+               const size_t          minfreespace,
                const fs::Path       &oldpath,
                const string         &newpath)
 {
@@ -56,7 +57,7 @@ _single_rename(const fs::find::Func  searchFunc,
       fs::Paths newpathdir;
 
       dirname = fs::dirname(newpath);
-      rv = searchFunc(srcmounts,dirname,newpathdir,1);
+      rv = searchFunc(srcmounts,dirname,minfreespace,newpathdir);
       if(rv == -1)
         return -1;
 
@@ -76,6 +77,7 @@ int
 _rename(const fs::find::Func  searchFunc,
         const fs::find::Func  actionFunc,
         const vector<string> &srcmounts,
+        const size_t          minfreespace,
         const string         &oldpath,
         const string         &newpath)
 {
@@ -83,7 +85,7 @@ _rename(const fs::find::Func  searchFunc,
   int error;
   fs::Paths oldpaths;
 
-  rv = actionFunc(srcmounts,oldpath,oldpaths,-1);
+  rv = actionFunc(srcmounts,oldpath,minfreespace,oldpaths);
   if(rv == -1)
     return -errno;
 
@@ -91,7 +93,7 @@ _rename(const fs::find::Func  searchFunc,
   for(fs::Paths::const_iterator
         i = oldpaths.begin(), ei = oldpaths.end(); i != ei; ++i)
     {
-      rv = _single_rename(searchFunc,srcmounts,*i,newpath);
+      rv = _single_rename(searchFunc,srcmounts,minfreespace,*i,newpath);
       if(rv == -1)
         error = errno;
     }
@@ -115,6 +117,7 @@ namespace mergerfs
       return _rename(*config.getattr,
                      *config.rename,
                      config.srcmounts,
+                     config.minfreespace,
                      oldpath,
                      newpath);
     }

src/rmdir.cpp

@@ -42,13 +42,14 @@ static
 int
 _rmdir(const fs::find::Func  actionFunc,
        const vector<string> &srcmounts,
+       const size_t          minfreespace,
        const string         &fusepath)
 {
   int rv;
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -78,6 +79,7 @@ namespace mergerfs
 
       return _rmdir(*config.rmdir,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath);
     }
   }

src/setxattr.cpp

@@ -242,6 +242,7 @@ static
 int
 _setxattr(const fs::find::Func  actionFunc,
           const vector<string> &srcmounts,
+          const size_t          minfreespace,
           const string         &fusepath,
           const char           *attrname,
           const char           *attrval,
@@ -253,7 +254,7 @@ _setxattr(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -302,6 +303,7 @@ namespace mergerfs
 
         return _setxattr(*config.setxattr,
                          config.srcmounts,
+                         config.minfreespace,
                          fusepath,
                          attrname,
                          attrval,

src/symlink.cpp

@@ -41,6 +41,7 @@ static
 int
 _symlink(const fs::find::Func  createFunc,
          const vector<string> &srcmounts,
+         const size_t          minfreespace,
          const string         &oldpath,
          const string         &newpath)
 {
@@ -50,7 +51,7 @@ _symlink(const fs::find::Func  createFunc,
   fs::Paths newpathdirs;
 
   newpathdir = fs::dirname(newpath);
-  rv = createFunc(srcmounts,newpathdir,newpathdirs,-1);
+  rv = createFunc(srcmounts,newpathdir,minfreespace,newpathdirs);
   if(rv == -1)
     return -errno;
 
@@ -83,6 +84,7 @@ namespace mergerfs
 
       return _symlink(*config.symlink,
                       config.srcmounts,
+                      config.minfreespace,
                       oldpath,
                       newpath);
     }

src/truncate.cpp

@@ -43,6 +43,7 @@ static
 int
 _truncate(const fs::find::Func  actionFunc,
           const vector<string> &srcmounts,
+          const size_t          minfreespace,
           const string         &fusepath,
           const off_t           size)
 {
@@ -50,7 +51,7 @@ _truncate(const fs::find::Func  actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -81,6 +82,7 @@ namespace mergerfs
 
       return _truncate(*config.truncate,
                        config.srcmounts,
+                       config.minfreespace,
                        fusepath,
                        size);
     }

src/unlink.cpp

@@ -42,13 +42,14 @@ static
 int
 _unlink(const fs::find::Func  actionFunc,
         const vector<string> &srcmounts,
+        const size_t          minfreespace,
         const string         &fusepath)
 {
   int rv;
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -78,6 +79,7 @@ namespace mergerfs
 
       return _unlink(*config.unlink,
                      config.srcmounts,
+                     config.minfreespace,
                      fusepath);
     }
   }

src/utimens.cpp

@@ -43,6 +43,7 @@ static
 int
 _utimens(const fs::find::Func   actionFunc,
          const vector<string>  &srcmounts,
+         const size_t           minfreespace,
          const string          &fusepath,
          const struct timespec  ts[2])
 {
@@ -50,7 +51,7 @@ _utimens(const fs::find::Func   actionFunc,
   int error;
   fs::Paths paths;
 
-  rv = actionFunc(srcmounts,fusepath,paths,-1);
+  rv = actionFunc(srcmounts,fusepath,minfreespace,paths);
   if(rv == -1)
     return -errno;
 
@@ -81,6 +82,7 @@ namespace mergerfs
 
       return _utimens(*config.utimens,
                       config.srcmounts,
+                      config.minfreespace,
                       fusepath,
                       ts);
     }