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| author | Miklos Szeredi <mszeredi@suse.cz> | 2007-10-18 03:07:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:31 -0700 |
| commit | 93a8c3cd9e9834dc5f5c373336f3a0065521152d (patch) | |
| tree | ce8731adbf7a2bcd441e8b82d3d932abf94b13df /fs | |
| parent | a9ff4f87056cd31a8232b88d013dc6c9ad719c18 (diff) | |
| download | linux-93a8c3cd9e9834dc5f5c373336f3a0065521152d.tar.gz linux-93a8c3cd9e9834dc5f5c373336f3a0065521152d.tar.bz2 linux-93a8c3cd9e9834dc5f5c373336f3a0065521152d.zip | |
fuse: add list of writable files to fuse_inode
Each WRITE request must carry a valid file descriptor. When a page is written
back from a memory mapping, the file through which the page was dirtied is not
available, so a new mechananism is needed to find a suitable file in
->writepage(s).
A list of fuse_files is added to fuse_inode. The file is removed from the
list in fuse_release().
This patch is in preparation for writable mmap support.
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')
| -rw-r--r-- | fs/fuse/file.c | 7 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 6 | ||||
| -rw-r--r-- | fs/fuse/inode.c | 2 |
3 files changed, 15 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 471ea70be48d..c4c59c7d0038 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -56,6 +56,7 @@ struct fuse_file *fuse_file_alloc(void) kfree(ff); ff = NULL; } + INIT_LIST_HEAD(&ff->write_entry); atomic_set(&ff->count, 0); } return ff; @@ -150,12 +151,18 @@ int fuse_release_common(struct inode *inode, struct file *file, int isdir) { struct fuse_file *ff = file->private_data; if (ff) { + struct fuse_conn *fc = get_fuse_conn(inode); + fuse_release_fill(ff, get_node_id(inode), file->f_flags, isdir ? FUSE_RELEASEDIR : FUSE_RELEASE); /* Hold vfsmount and dentry until release is finished */ ff->reserved_req->vfsmount = mntget(file->f_path.mnt); ff->reserved_req->dentry = dget(file->f_path.dentry); + + spin_lock(&fc->lock); + list_del(&ff->write_entry); + spin_unlock(&fc->lock); /* * Normally this will send the RELEASE request, * however if some asynchronous READ or WRITE requests diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index b24fc9b386f8..5657cca0d0cb 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -70,6 +70,9 @@ struct fuse_inode { /** Version of last attribute change */ u64 attr_version; + + /** Files usable in writepage. Protected by fc->lock */ + struct list_head write_files; }; /** FUSE specific file data */ @@ -82,6 +85,9 @@ struct fuse_file { /** Refcount */ atomic_t count; + + /** Entry on inode's write_files list */ + struct list_head write_entry; }; /** One input argument of a request */ diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 3c13981f48e2..49d716036ea7 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -56,6 +56,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) fi->i_time = 0; fi->nodeid = 0; fi->nlookup = 0; + INIT_LIST_HEAD(&fi->write_files); fi->forget_req = fuse_request_alloc(); if (!fi->forget_req) { kmem_cache_free(fuse_inode_cachep, inode); @@ -68,6 +69,7 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) static void fuse_destroy_inode(struct inode *inode) { struct fuse_inode *fi = get_fuse_inode(inode); + BUG_ON(!list_empty(&fi->write_files)); if (fi->forget_req) fuse_request_free(fi->forget_req); kmem_cache_free(fuse_inode_cachep, inode); |