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authorEric Paris <eparis@redhat.com>2009-05-22 01:01:26 +0400
committerEric Paris <eparis@redhat.com>2009-06-11 22:57:53 +0400
commit3be25f49b9d6a97eae9bcb96d3292072b7658bd8 (patch)
tree36f7d96481a47a6bde3c2f961346e940698111e0 /fs/notify/fsnotify.c
parent90586523eb4b349806887c62ee70685a49415124 (diff)
downloadlinux-3be25f49b9d6a97eae9bcb96d3292072b7658bd8.tar.xz
fsnotify: add marks to inodes so groups can interpret how to handle those inodes
This patch creates a way for fsnotify groups to attach marks to inodes. These marks have little meaning to the generic fsnotify infrastructure and thus their meaning should be interpreted by the group that attached them to the inode's list. dnotify and inotify will make use of these markings to indicate which inodes are of interest to their respective groups. But this implementation has the useful property that in the future other listeners could actually use the marks for the exact opposite reason, aka to indicate which inodes it had NO interest in. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/notify/fsnotify.c')
-rw-r--r--fs/notify/fsnotify.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 56bee0f10c38..d5654629c659 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -26,6 +26,15 @@
#include "fsnotify.h"
/*
+ * Clear all of the marks on an inode when it is being evicted from core
+ */
+void __fsnotify_inode_delete(struct inode *inode)
+{
+ fsnotify_clear_marks_by_inode(inode);
+}
+EXPORT_SYMBOL_GPL(__fsnotify_inode_delete);
+
+/*
* This is the main call to fsnotify. The VFS calls into hook specific functions
* in linux/fsnotify.h. Those functions then in turn call here. Here will call
* out to all of the registered fsnotify_group. Those groups can then use the
@@ -43,6 +52,8 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is)
if (!(mask & fsnotify_mask))
return;
+ if (!(mask & to_tell->i_fsnotify_mask))
+ return;
/*
* SRCU!! the groups list is very very much read only and the path is
* very hot. The VAST majority of events are not going to need to do
@@ -51,6 +62,8 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is)
idx = srcu_read_lock(&fsnotify_grp_srcu);
list_for_each_entry_rcu(group, &fsnotify_groups, group_list) {
if (mask & group->mask) {
+ if (!group->ops->should_send_event(group, to_tell, mask))
+ continue;
if (!event) {
event = fsnotify_create_event(to_tell, mask, data, data_is);
/* shit, we OOM'd and now we can't tell, maybe