diff options
| author | Josef Bacik <josef@redhat.com> | 2011-07-18 13:21:38 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 20:47:58 -0400 |
| commit | 06222e491e663dac939f04b125c9dc52126a75c4 (patch) | |
| tree | 99636fd666c8148a5bf58ea4844263d4b3a36310 /fs/fuse | |
| parent | c334b1138bd44bea578eab7971c59bd9212a1093 (diff) | |
| download | lwn-06222e491e663dac939f04b125c9dc52126a75c4.tar.gz lwn-06222e491e663dac939f04b125c9dc52126a75c4.zip | |
fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek
This converts everybody to handle SEEK_HOLE/SEEK_DATA properly. In some cases
we just return -EINVAL, in others we do the normal generic thing, and in others
we're simply making sure that the properly due-dilligence is done. For example
in NFS/CIFS we need to make sure the file size is update properly for the
SEEK_HOLE and SEEK_DATA case, but since it calls the generic llseek stuff itself
that is all we have to do. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/file.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 82a66466a24c..73b89df20851 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1600,15 +1600,32 @@ static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin) struct inode *inode = file->f_path.dentry->d_inode; mutex_lock(&inode->i_mutex); - switch (origin) { - case SEEK_END: + if (origin != SEEK_CUR || origin != SEEK_SET) { retval = fuse_update_attributes(inode, NULL, file, NULL); if (retval) goto exit; + } + + switch (origin) { + case SEEK_END: offset += i_size_read(inode); break; case SEEK_CUR: offset += file->f_pos; + break; + case SEEK_DATA: + if (offset >= i_size_read(inode)) { + retval = -ENXIO; + goto exit; + } + break; + case SEEK_HOLE: + if (offset >= i_size_read(inode)) { + retval = -ENXIO; + goto exit; + } + offset = i_size_read(inode); + break; } retval = -EINVAL; if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) { |