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authorEric Paris <eparis@redhat.com>2009-12-17 21:24:33 -0500
committerEric Paris <eparis@redhat.com>2010-07-28 09:59:00 -0400
commite898386146deb49a0b45ff1887d9da149c003209 (patch)
tree6238ddb50919383139e7937c75a21524faacf03d /fs/notify
parentb9e4e3bd0495fea9e8f8e712889c9cd8ffa43c94 (diff)
downloadop-kernel-dev-e898386146deb49a0b45ff1887d9da149c003209.zip
op-kernel-dev-e898386146deb49a0b45ff1887d9da149c003209.tar.gz
fsnotify: clear ignored mask on modify
On inode modification we clear the ignored mask for all of the marks on the inode. This allows userspace to ignore accesses to inodes until there is something different. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fsnotify.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 7f14ddc..3ad940d 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -140,6 +140,33 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
}
EXPORT_SYMBOL_GPL(__fsnotify_parent);
+void __fsnotify_flush_ignored_mask(struct inode *inode, void *data, int data_is)
+{
+ struct fsnotify_mark *mark;
+ struct hlist_node *node;
+
+ if (!hlist_empty(&inode->i_fsnotify_marks)) {
+ spin_lock(&inode->i_lock);
+ hlist_for_each_entry(mark, node, &inode->i_fsnotify_marks, i.i_list) {
+ mark->ignored_mask = 0;
+ }
+ spin_unlock(&inode->i_lock);
+ }
+
+ if (data_is == FSNOTIFY_EVENT_PATH) {
+ struct vfsmount *mnt;
+
+ mnt = ((struct path *)data)->mnt;
+ if (mnt && !hlist_empty(&mnt->mnt_fsnotify_marks)) {
+ spin_lock(&mnt->mnt_root->d_lock);
+ hlist_for_each_entry(mark, node, &mnt->mnt_fsnotify_marks, m.m_list) {
+ mark->ignored_mask = 0;
+ }
+ spin_unlock(&mnt->mnt_root->d_lock);
+ }
+ }
+}
+
static void send_to_group(struct fsnotify_group *group, struct inode *to_tell,
struct vfsmount *mnt, __u32 mask, void *data,
int data_is, u32 cookie, const char *file_name,
@@ -170,6 +197,7 @@ static bool needed_by_vfsmount(__u32 test_mask, struct vfsmount *mnt)
return (test_mask & mnt->mnt_fsnotify_mask);
}
+
/*
* 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
@@ -190,6 +218,9 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const
list_empty(&fsnotify_vfsmount_groups))
return;
+ if (mask & FS_MODIFY)
+ __fsnotify_flush_ignored_mask(to_tell, data, data_is);
+
/* if none of the directed listeners or vfsmount listeners care */
if (!(test_mask & fsnotify_inode_mask) &&
!(test_mask & fsnotify_vfsmount_mask))
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