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authorEric Paris <eparis@redhat.com>2010-10-29 01:21:56 +0400
committerEric Paris <eparis@redhat.com>2010-10-29 01:22:13 +0400
commit6ad2d4e3e97ee4bfde0b45e8dfe37911330fc4aa (patch)
tree6a4b98f659a886147088a983170fa75e5113f017 /fs/notify/vfsmount_mark.c
parent9343919c1495b085a4a1cf4cbada8d7888daf099 (diff)
downloadlinux-6ad2d4e3e97ee4bfde0b45e8dfe37911330fc4aa.tar.xz
fsnotify: implement ordering between notifiers
fanotify needs to be able to specify that some groups get events before others. They use this idea to make sure that a hierarchical storage manager gets access to files before programs which actually use them. This is purely infrastructure. Everything will have a priority of 0, but the infrastructure will exist for it to be non-zero. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/notify/vfsmount_mark.c')
-rw-r--r--fs/notify/vfsmount_mark.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c
index 56772b578fbd..85eebff6d0d7 100644
--- a/fs/notify/vfsmount_mark.c
+++ b/fs/notify/vfsmount_mark.c
@@ -169,7 +169,11 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
goto out;
}
- if (mark->group < lmark->group)
+ if (mark->group->priority < lmark->group->priority)
+ continue;
+
+ if ((mark->group->priority == lmark->group->priority) &&
+ (mark->group < lmark->group))
continue;
hlist_add_before_rcu(&mark->m.m_list, &lmark->m.m_list);