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fsnotify: clear ignored mask on modify

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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>
This commit is contained in:
Eric Paris 2009-12-17 21:24:33 -05:00
parent b9e4e3bd04
commit e898386146
1 changed files with 31 additions and 0 deletions
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31
fs/notify/fsnotify.c
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@ -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))