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authorMiklos Szeredi <mszeredi@suse.cz>2007-10-17 02:31:03 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 11:43:04 -0400
commitebc14c4dbeb56195950058db9aa32de06c22de0d (patch)
tree479813b230af145fd8c08e24b11c405ef6d4a25c /fs/fuse/dir.c
parent244f6385c2891e366a7de5f6746ccc257efd8952 (diff)
fuse: fix permission checking on sticky directories
The VFS checks sticky bits on the parent directory even if the filesystem defines it's own ->permission(). In some situations (sshfs, mountlo, etc) the user does have permission to delete a file even if the attribute based checking would not allow it. So work around this by storing the permission bits separately and returning them in stat(), but cutting the permission bits off from inode->i_mode. This is slightly hackish, but it's probably not worth it to add new infrastructure in VFS and a slight performance penalty for all filesystems, just for the sake of fuse. [Jan Engelhardt] cosmetic fixes Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse/dir.c')
-rw-r--r--fs/fuse/dir.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 9ee2a6bbfa37..8ea4ea13ec5f 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1054,8 +1054,10 @@ static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
1054 if (fi->i_time < get_jiffies_64()) 1054 if (fi->i_time < get_jiffies_64())
1055 err = fuse_do_getattr(inode); 1055 err = fuse_do_getattr(inode);
1056 1056
1057 if (!err) 1057 if (!err) {
1058 generic_fillattr(inode, stat); 1058 generic_fillattr(inode, stat);
1059 stat->mode = fi->orig_i_mode;
1060 }
1059 1061
1060 return err; 1062 return err;
1061} 1063}