fanotify: use both marks when possible
fanotify currently, when given a vfsmount_mark will look up (if it exists)
the corresponding inode mark. This patch drops that lookup and uses the
mark provided.
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index bda588b..3344bdd5 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -128,7 +128,7 @@
* userspace notification for that pair.
*/
static bool dnotify_should_send_event(struct fsnotify_group *group,
- struct inode *inode, struct vfsmount *mnt,
+ struct inode *inode,
struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index ef4fa4a..eb8f73c 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -153,59 +153,20 @@
return ret;
}
-static bool should_send_vfsmount_event(struct fsnotify_group *group,
- struct vfsmount *mnt,
- struct inode *inode,
- struct fsnotify_mark *mnt_mark,
- __u32 mask)
-{
- struct fsnotify_mark *inode_mark;
-
- pr_debug("%s: group=%p vfsmount=%p mark=%p mask=%x\n",
- __func__, group, mnt, mnt_mark, mask);
-
- mask &= mnt_mark->mask;
- mask &= ~mnt_mark->ignored_mask;
-
- if (mask) {
- inode_mark = fsnotify_find_inode_mark(group, inode);
- if (inode_mark) {
- mask &= ~inode_mark->ignored_mask;
- fsnotify_put_mark(inode_mark);
- }
- }
-
- return mask;
-}
-
-static bool should_send_inode_event(struct fsnotify_group *group,
- struct inode *inode,
- struct fsnotify_mark *mark,
- __u32 mask)
-{
- pr_debug("%s: group=%p inode=%p mark=%p mask=%x\n",
- __func__, group, inode, mark, mask);
-
- /*
- * if the event is for a child and this inode doesn't care about
- * events on the child, don't send it!
- */
- if ((mask & FS_EVENT_ON_CHILD) &&
- !(mark->mask & FS_EVENT_ON_CHILD))
- return false;
- else
- return true;
-}
-
static bool fanotify_should_send_event(struct fsnotify_group *group,
struct inode *to_tell,
- struct vfsmount *mnt,
struct fsnotify_mark *inode_mark,
- struct fsnotify_mark *vfsmount_mark,
- __u32 mask, void *data, int data_type)
+ struct fsnotify_mark *vfsmnt_mark,
+ __u32 event_mask, void *data, int data_type)
{
- pr_debug("%s: group=%p to_tell=%p mnt=%p mask=%x data=%p data_type=%d\n",
- __func__, group, to_tell, mnt, mask, data, data_type);
+ __u32 marks_mask, marks_ignored_mask;
+
+ pr_debug("%s: group=%p to_tell=%p inode_mark=%p vfsmnt_mark=%p "
+ "mask=%x data=%p data_type=%d\n", __func__, group, to_tell,
+ inode_mark, vfsmnt_mark, event_mask, data, data_type);
+
+ pr_debug("%s: group=%p vfsmount_mark=%p inode_mark=%p mask=%x\n",
+ __func__, group, vfsmnt_mark, inode_mark, event_mask);
/* sorry, fanotify only gives a damn about files and dirs */
if (!S_ISREG(to_tell->i_mode) &&
@@ -216,11 +177,30 @@
if (data_type != FSNOTIFY_EVENT_FILE)
return false;
- if (mnt)
- return should_send_vfsmount_event(group, mnt, to_tell,
- vfsmount_mark, mask);
- else
- return should_send_inode_event(group, to_tell, inode_mark, mask);
+ if (inode_mark && vfsmnt_mark) {
+ marks_mask = (vfsmnt_mark->mask | inode_mark->mask);
+ marks_ignored_mask = (vfsmnt_mark->ignored_mask | inode_mark->ignored_mask);
+ } else if (inode_mark) {
+ /*
+ * if the event is for a child and this inode doesn't care about
+ * events on the child, don't send it!
+ */
+ if ((event_mask & FS_EVENT_ON_CHILD) &&
+ !(inode_mark->mask & FS_EVENT_ON_CHILD))
+ return false;
+ marks_mask = inode_mark->mask;
+ marks_ignored_mask = inode_mark->ignored_mask;
+ } else if (vfsmnt_mark) {
+ marks_mask = vfsmnt_mark->mask;
+ marks_ignored_mask = vfsmnt_mark->ignored_mask;
+ } else {
+ BUG();
+ }
+
+ if (event_mask & marks_mask & ~marks_ignored_mask)
+ return true;
+
+ return false;
}
const struct fsnotify_ops fanotify_fsnotify_ops = {
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 090b64c..4d2a82c 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -183,7 +183,7 @@
if (!inode_test_mask && !vfsmount_test_mask)
return 0;
- if (group->ops->should_send_event(group, to_tell, mnt, inode_mark,
+ if (group->ops->should_send_event(group, to_tell, inode_mark,
vfsmount_mark, mask, data,
data_is) == false)
return 0;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index e53f497..5e73eeb 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -142,11 +142,11 @@
}
static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
- if ((mark->mask & FS_EXCL_UNLINK) &&
+ if ((inode_mark->mask & FS_EXCL_UNLINK) &&
(data_type == FSNOTIFY_EVENT_FILE)) {
struct file *file = data;