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| author | Ken Sumrall <ksumrall@android.com> | 2010-11-24 12:57:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-11-25 06:50:41 +0900 |
| commit | a0822c55779d9319939eac69f00bb729ea9d23da (patch) | |
| tree | a12ff25e7718bb04ac2f85c672c9f9c370a8b167 | |
| parent | c22c7aeff69796f46ae0fcec141538e28f50b24e (diff) | |
| download | linux-a0822c55779d9319939eac69f00bb729ea9d23da.tar.gz linux-a0822c55779d9319939eac69f00bb729ea9d23da.tar.bz2 linux-a0822c55779d9319939eac69f00bb729ea9d23da.zip | |
fuse: fix attributes after open(O_TRUNC)
The attribute cache for a file was not being cleared when a file is opened
with O_TRUNC.
If the filesystem's open operation truncates the file ("atomic_o_trunc"
feature flag is set) then the kernel should invalidate the cached st_mtime
and st_ctime attributes.
Also i_size should be explicitly be set to zero as it is used sometimes
without refreshing the cache.
Signed-off-by: Ken Sumrall <ksumrall@android.com>
Cc: Anfei <anfei.zhou@gmail.com>
Cc: "Anand V. Avati" <avati@gluster.com>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/fuse/file.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index c8224587123f..9242d294fe90 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -134,6 +134,7 @@ EXPORT_SYMBOL_GPL(fuse_do_open); void fuse_finish_open(struct inode *inode, struct file *file) { struct fuse_file *ff = file->private_data; + struct fuse_conn *fc = get_fuse_conn(inode); if (ff->open_flags & FOPEN_DIRECT_IO) file->f_op = &fuse_direct_io_file_operations; @@ -141,6 +142,15 @@ void fuse_finish_open(struct inode *inode, struct file *file) invalidate_inode_pages2(inode->i_mapping); if (ff->open_flags & FOPEN_NONSEEKABLE) nonseekable_open(inode, file); + if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) { + struct fuse_inode *fi = get_fuse_inode(inode); + + spin_lock(&fc->lock); + fi->attr_version = ++fc->attr_version; + i_size_write(inode, 0); + spin_unlock(&fc->lock); + fuse_invalidate_attr(inode); + } } int fuse_open_common(struct inode *inode, struct file *file, bool isdir) |