diff options
| author | Eric Paris <eparis@redhat.com> | 2010-10-28 17:21:56 -0400 |
|---|---|---|
| committer | Eric Paris <eparis@redhat.com> | 2010-10-28 17:22:13 -0400 |
| commit | ff8bcbd03da881bf1171910c6c07d44bd3c0a234 (patch) | |
| tree | ec7ad24bf2923bc19c48f1160a05328299193a8d | |
| parent | 2868201965419b9011f3f07fd80e765181343cb1 (diff) | |
fsnotify: correctly handle return codes from listeners
When fsnotify groups return errors they are ignored. For permissions
events these should be passed back up the stack, but for most events these
should continue to be ignored.
Signed-off-by: Eric Paris <eparis@redhat.com>
| -rw-r--r-- | fs/notify/fsnotify.c | 20 | ||||
| -rw-r--r-- | include/linux/fsnotify_backend.h | 2 |
2 files changed, 14 insertions, 8 deletions
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index 4498a208df9..57ecadd85ab 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -252,20 +252,23 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, if (inode_group > vfsmount_group) { /* handle inode */ - send_to_group(to_tell, NULL, inode_mark, NULL, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, NULL, inode_mark, NULL, mask, data, + data_is, cookie, file_name, &event); /* we didn't use the vfsmount_mark */ vfsmount_group = NULL; } else if (vfsmount_group > inode_group) { - send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data, + data_is, cookie, file_name, &event); inode_group = NULL; } else { - send_to_group(to_tell, mnt, inode_mark, vfsmount_mark, - mask, data, data_is, cookie, file_name, - &event); + ret = send_to_group(to_tell, mnt, inode_mark, vfsmount_mark, + mask, data, data_is, cookie, file_name, + &event); } + if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS)) + goto out; + if (inode_group) inode_node = srcu_dereference(inode_node->next, &fsnotify_mark_srcu); @@ -273,7 +276,8 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, vfsmount_node = srcu_dereference(vfsmount_node->next, &fsnotify_mark_srcu); } - + ret = 0; +out: srcu_read_unlock(&fsnotify_mark_srcu, idx); /* * fsnotify_create_event() took a reference so the event can't be cleaned diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index 82532953416..026892187c8 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -64,6 +64,8 @@ #define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO) +#define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM) + #define ALL_FSNOTIFY_EVENTS (FS_ACCESS | FS_MODIFY | FS_ATTRIB | \ FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN | \ FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE | \ |