The patch titled Subject: inotify: remove broken mask checks causing unmount to be EINVAL has been added to the -mm tree. Its filename is inotify-remove-broken-mask-checks-causing-unmount-to-be-einval.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Jim Somerville <Jim.Somerville@xxxxxxxxxxxxx> Subject: inotify: remove broken mask checks causing unmount to be EINVAL Running the command: inotifywait -e unmount /mnt/disk immediately aborts with a -EINVAL return code. This is however a valid parameter. This abort occurs only if unmount is the sole event parameter. If other event parameters are supplied, then the unmount event wait will work. The problem was introduced by commit 44b350fc23e ("inotify: Fix mask checks"). In that commit, it states: The mask checks in inotify_update_existing_watch() and inotify_new_watch() are useless because inotify_arg_to_mask() sets FS_IN_IGNORED and FS_EVENT_ON_CHILD bits anyway. But instead of removing the useless checks, it did this: mask = inotify_arg_to_mask(arg); - if (unlikely(!mask)) + if (unlikely(!(mask & IN_ALL_EVENTS))) return -EINVAL; The problem is that IN_ALL_EVENTS doesn't include IN_UNMOUNT, and other parts of the code keep IN_UNMOUNT separate from IN_ALL_EVENTS. So the check should be: if (unlikely(!(mask & (IN_ALL_EVENTS | IN_UNMOUNT)))) But inotify_arg_to_mask(arg) always sets the IN_UNMOUNT bit in the mask anyway, so the check is always going to pass and thus should simply be removed. Also note that inotify_arg_to_mask completely controls what mask bits get set from arg, there's no way for invalid bits to get enabled there. Lets fix it by simply removing the useless broken checks. Signed-off-by: Jim Somerville <Jim.Somerville@xxxxxxxxxxxxx> Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> Cc: Jerome Marchand <jmarchan@xxxxxxxxxx> Cc: John McCutchan <john@xxxxxxxxxxxxxxxxx> Cc: Robert Love <rlove@xxxxxxxxx> Cc: Eric Paris <eparis@xxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> [2.6.37+] Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/notify/inotify/inotify_user.c | 4 ---- 1 file changed, 4 deletions(-) diff -puN fs/notify/inotify/inotify_user.c~inotify-remove-broken-mask-checks-causing-unmount-to-be-einval fs/notify/inotify/inotify_user.c --- a/fs/notify/inotify/inotify_user.c~inotify-remove-broken-mask-checks-causing-unmount-to-be-einval +++ a/fs/notify/inotify/inotify_user.c @@ -576,8 +576,6 @@ static int inotify_update_existing_watch /* don't allow invalid bits: we don't want flags set */ mask = inotify_arg_to_mask(arg); - if (unlikely(!(mask & IN_ALL_EVENTS))) - return -EINVAL; fsn_mark = fsnotify_find_inode_mark(group, inode); if (!fsn_mark) @@ -629,8 +627,6 @@ static int inotify_new_watch(struct fsno /* don't allow invalid bits: we don't want flags set */ mask = inotify_arg_to_mask(arg); - if (unlikely(!(mask & IN_ALL_EVENTS))) - return -EINVAL; tmp_i_mark = kmem_cache_alloc(inotify_inode_mark_cachep, GFP_KERNEL); if (unlikely(!tmp_i_mark)) _ Patches currently in -mm which might be from Jim.Somerville@xxxxxxxxxxxxx are inotify-remove-broken-mask-checks-causing-unmount-to-be-einval.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html