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| author | Miklos Szeredi <mszeredi@suse.cz> | 2007-10-16 23:31:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:43:03 -0700 |
| commit | c756e0a4d79202535774806f148026e40466a5eb (patch) | |
| tree | aa769ecfe2204e2e1969108d2c391b88b95e983b /fs/fuse/fuse_i.h | |
| parent | de5e3dec421c44c999071b8f7e0580ad2ade92ae (diff) | |
| download | lwn-c756e0a4d79202535774806f148026e40466a5eb.tar.gz lwn-c756e0a4d79202535774806f148026e40466a5eb.zip | |
fuse: add reference counting to fuse_file
Make lifetime of 'struct fuse_file' independent from 'struct file' by adding a
reference counter and destructor.
This will enable asynchronous page writeback, where it cannot be guaranteed,
that the file is not released while a request with this file handle is being
served.
The actual RELEASE request is only sent when there are no more references to
the fuse_file.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse/fuse_i.h')
| -rw-r--r-- | fs/fuse/fuse_i.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 95bcb433d1b4..60683b787250 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -72,6 +72,9 @@ struct fuse_file { /** File handle used by userspace */ u64 fh; + + /** Refcount */ + atomic_t count; }; /** One input argument of a request */ @@ -216,7 +219,7 @@ struct fuse_req { unsigned page_offset; /** File used in the request (or NULL) */ - struct file *file; + struct fuse_file *ff; /** vfsmount used in release */ struct vfsmount *vfsmount; @@ -420,7 +423,7 @@ void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, /** * Initialize READ or READDIR request */ -void fuse_read_fill(struct fuse_req *req, struct file *file, +void fuse_read_fill(struct fuse_req *req, struct fuse_file *ff, struct inode *inode, loff_t pos, size_t count, int opcode); /** @@ -433,9 +436,9 @@ void fuse_file_free(struct fuse_file *ff); void fuse_finish_open(struct inode *inode, struct file *file, struct fuse_file *ff, struct fuse_open_out *outarg); -/** */ -struct fuse_req *fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, - int opcode); +/** Fill in ff->reserved_req with a RELEASE request */ +void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode); + /** * Send RELEASE or RELEASEDIR request */ |