diff options
Diffstat (limited to 'fs/notify')
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 0f25fc20a6a7..96d4ffd72519 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -353,10 +353,26 @@ static void fanotify_update_object_mask(struct fsnotify_group *group, } } +static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, __u32 mask) +{ + __u32 oldmask; + + spin_lock(&fsn_mark->lock); + oldmask = fsn_mark->mask; + fsn_mark->mask = oldmask & ~mask; + spin_unlock(&fsn_mark->lock); + + if (!(oldmask & ~mask)) + fsnotify_destroy_mark(fsn_mark); + + return mask & oldmask; +} + static int fanotify_remove_mark(struct fsnotify_group *group, struct inode *inode, - struct vfsmount *mnt, unsigned int flags, __u32 mask) + struct vfsmount *mnt, __u32 mask) { struct fsnotify_mark *fsn_mark = NULL; + __u32 removed; BUG_ON(inode && mnt); BUG_ON(!inode && !mnt); @@ -371,11 +387,20 @@ static int fanotify_remove_mark(struct fsnotify_group *group, struct inode *inod if (!fsn_mark) return -ENOENT; - fanotify_update_object_mask(group, inode, mnt, fsn_mark, flags, mask); - + removed = fanotify_mark_remove_from_mask(fsn_mark, mask); /* matches the fsnotify_find_inode_mark() */ fsnotify_put_mark(fsn_mark); + if (removed & group->mask) + fsnotify_recalc_group_mask(group); + if (inode) { + if (removed & inode->i_fsnotify_mask) + fsnotify_recalc_inode_mask(inode); + } else if (mnt) { + if (removed & mnt->mnt_fsnotify_mask) + fsnotify_recalc_vfsmount_mask(mnt); + } + return 0; } @@ -568,7 +593,7 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, ret = fanotify_add_mark(group, inode, NULL, flags, mask); break; case FAN_MARK_REMOVE: - ret = fanotify_remove_mark(group, inode, NULL, flags, mask); + ret = fanotify_remove_mark(group, inode, NULL, mask); break; default: ret = -EINVAL; |