add support for ioctl on directories. closes #27

src/config.cpp

@@ -22,8 +22,6 @@
    THE SOFTWARE.
 */
 
-#include <fuse.h>
-
 #include <string>
 #include <vector>
 
@@ -57,10 +55,16 @@ namespace mergerfs
       search = &Policy::ff;
     }
 
+    const Config&
+    get(const struct fuse_context *fc)
+    {
+      return *((Config*)fc->private_data);
+    }
+
     const Config&
     get(void)
     {
-      return (*((Config*)fuse_get_context()->private_data));
+      return get(fuse_get_context());
     }
 
     Config&

src/config.hpp

@@ -25,6 +25,8 @@
 #ifndef __CONFIG_HPP__
 #define __CONFIG_HPP__
 
+#include <fuse.h>
+
 #include <sys/stat.h>
 
 #include <string>
@@ -56,6 +58,7 @@ namespace mergerfs
       const std::string controlfile;
     };
 
+    const Config &get(const struct fuse_context *fc);
     const Config &get(void);
     Config       &get_writable(void);
   }

src/destroy.cpp

@@ -0,0 +1,35 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <[email protected]>
+
+   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.
+*/
+
+namespace mergerfs
+{
+  namespace destroy
+  {
+    void
+    destroy(void *)
+    {
+
+    }
+  }
+}

src/destroy.hpp

@@ -0,0 +1,32 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <[email protected]>
+
+   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.
+*/
+
+namespace mergerfs
+{
+  namespace destroy
+  {
+    void
+    destroy(void *);
+  }
+}

src/init.cpp

@@ -0,0 +1,41 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <[email protected]>
+
+   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 <fuse.h>
+
+#include "config.hpp"
+
+namespace mergerfs
+{
+  namespace init
+  {
+    void *
+    init(struct fuse_conn_info *conn)
+    {
+      conn->want |= FUSE_CAP_IOCTL_DIR;
+
+      return &config::get_writable();
+    }
+  }
+}

src/init.hpp

@@ -0,0 +1,32 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <[email protected]>
+
+   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.
+*/
+
+namespace mergerfs
+{
+  namespace init
+  {
+    void *
+    init(struct fuse_conn_info *conn);
+  }
+}

src/ioctl.cpp

@@ -25,12 +25,20 @@
 #include <fuse.h>
 
 #include <string>
+#include <vector>
 
 #include <errno.h>
 #include <sys/ioctl.h>
 #include <linux/fs.h>
 
+#include "config.hpp"
 #include "fileinfo.hpp"
+#include "ugid.hpp"
+#include "rwlock.hpp"
+
+using std::string;
+using std::vector;
+using namespace mergerfs;
 
 static
 int
@@ -72,6 +80,57 @@ _ioctl(const int           fd,
   return ((rv == -1) ? -errno : rv);
 }
 
+static
+int
+_ioctl_dir_base(const fs::SearchFunc  searchFunc,
+                const vector<string> &srcmounts,
+                const string          fusepath,
+                const int             cmd,
+                void                 *arg,
+                const unsigned int    flags,
+                void                 *data)
+{
+  int fd;
+  int rv;
+  fs::PathVector paths;
+
+  rv = searchFunc(srcmounts,fusepath,paths);
+  if(rv == -1)
+    return -errno;
+
+  fd = ::open(paths[0].full.c_str(),flags);
+  if(fd == -1)
+    return -errno;
+
+  rv = _ioctl(fd,cmd,arg,flags,data);
+
+  close(fd);
+
+  return rv;
+}
+
+static
+int
+_ioctl_dir(const string        fusepath,
+           const int           cmd,
+           void               *arg,
+           const unsigned int  flags,
+           void               *data)
+{
+  const struct fuse_context *fc     = fuse_get_context();
+  const config::Config      &config = config::get(fc);
+  const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
+  const rwlock::ReadGuard    readlock(&config.srcmountslock);
+
+  return _ioctl_dir_base(*config.search,
+                         config.srcmounts,
+                         fusepath,
+                         cmd,
+                         arg,
+                         flags,
+                         data);
+}
+
 namespace mergerfs
 {
   namespace ioctl
@@ -86,6 +145,13 @@ namespace mergerfs
     {
       const FileInfo *fileinfo = (FileInfo*)ffi->fh;
 
+      if(flags & FUSE_IOCTL_DIR)
+        return _ioctl_dir(fusepath,
+                          cmd,
+                          arg,
+                          flags,
+                          data);
+
       return _ioctl(fileinfo->fd,
                     cmd,
                     arg,

src/mergerfs.cpp

@@ -38,24 +38,28 @@
 #include "chmod.hpp"
 #include "chown.hpp"
 #include "create.hpp"
+#include "destroy.hpp"
 #include "fallocate.hpp"
 #include "fgetattr.hpp"
 #include "flush.hpp"
 #include "fsync.hpp"
 #include "ftruncate.hpp"
 #include "getattr.hpp"
 #include "getxattr.hpp"
+#include "init.hpp"
 #include "ioctl.hpp"
 #include "link.hpp"
 #include "listxattr.hpp"
 #include "mkdir.hpp"
 #include "mknod.hpp"
 #include "open.hpp"
+#include "opendir.hpp"
 #include "read.hpp"
 #include "read_buf.hpp"
 #include "readdir.hpp"
 #include "readlink.hpp"
 #include "release.hpp"
+#include "releasedir.hpp"
 #include "removexattr.hpp"
 #include "rename.hpp"
 #include "rmdir.hpp"
@@ -82,7 +86,7 @@ get_fuse_operations()
   ops.chmod       = mergerfs::chmod::chmod;
   ops.chown       = mergerfs::chown::chown;
   ops.create      = mergerfs::create::create;
-  ops.destroy     = NULL;
+  ops.destroy     = mergerfs::destroy::destroy;
   ops.fallocate   = mergerfs::fallocate::fallocate;
   ops.fgetattr    = mergerfs::fgetattr::fgetattr;
   ops.flock       = NULL;
@@ -93,22 +97,22 @@ get_fuse_operations()
   ops.getattr     = mergerfs::getattr::getattr;
   ops.getdir      = NULL;       /* deprecated; use readdir */
   ops.getxattr    = mergerfs::getxattr::getxattr;
-  ops.init        = NULL;
+  ops.init        = mergerfs::init::init;
   ops.ioctl       = mergerfs::ioctl::ioctl;
   ops.link        = mergerfs::link::link;
   ops.listxattr   = mergerfs::listxattr::listxattr;
   ops.lock        = NULL;
   ops.mkdir       = mergerfs::mkdir::mkdir;
   ops.mknod       = mergerfs::mknod::mknod;
   ops.open        = mergerfs::open::open;
-  ops.opendir     = NULL;
+  ops.opendir     = mergerfs::opendir::opendir;
   ops.poll        = NULL;
   ops.read        = mergerfs::read::read;
   ops.read_buf    = mergerfs::read_buf::read_buf;
   ops.readdir     = mergerfs::readdir::readdir;
   ops.readlink    = mergerfs::readlink::readlink;
   ops.release     = mergerfs::release::release;
-  ops.releasedir  = NULL;
+  ops.releasedir  = mergerfs::releasedir::releasedir;
   ops.removexattr = mergerfs::removexattr::removexattr;
   ops.rename      = mergerfs::rename::rename;
   ops.rmdir       = mergerfs::rmdir::rmdir;

src/opendir.cpp

@@ -0,0 +1,40 @@
+/*
+   The MIT License (MIT)
+
+   Copyright (c) 2014 Antonio SJ Musumeci <[email protected]>
+
+   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 <fuse.h>
+
+namespace mergerfs
+{
+  namespace opendir
+  {
+    int
+    opendir(const char            *fusepath,
+            struct fuse_file_info *ffi)
+    {
+      ffi->fh = 0;
+
+      return 0;
+    }
+  }
+}