fsnotify: provide the data type to should_send_event

fanotify is only interested in event types which contain enough information
to open the original file in the context of the fanotify listener.  Since
fanotify may not want to send events if that data isn't present we pass
the data type to the should_send_event function call so fanotify can express
its lack of interest.

Signed-off-by: Eric Paris <eparis@redhat.com>

6 files changed, 11 insertions, 6 deletions

diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 85b97fca14de..6f30f496e235 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -133,7 +133,8 @@ static int dnotify_handle_event(struct fsnotify_group *group,
  * userspace notification for that pair.
  */
 static bool dnotify_should_send_event(struct fsnotify_group *group,
-                                      struct inode *inode, __u32 mask)
+                                      struct inode *inode, __u32 mask,
+                                      int data_type)
 {
         struct fsnotify_mark_entry *entry;
         bool send;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index fcc2f064af83..fc06e4789392 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -157,7 +157,7 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const
         idx = srcu_read_lock(&fsnotify_grp_srcu);
         list_for_each_entry_rcu(group, &fsnotify_groups, group_list) {
                 if (test_mask & group->mask) {
-                        if (!group->ops->should_send_event(group, to_tell, mask))
+                        if (!group->ops->should_send_event(group, to_tell, mask, data_is))
                                 continue;
                         if (!event) {
                                 event = fsnotify_create_event(to_tell, mask, data,
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index e27960cd76ab..fc7c4952e6a2 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -86,7 +86,8 @@ static void inotify_freeing_mark(struct fsnotify_mark_entry *entry, struct fsnot
         inotify_ignored_and_remove_idr(entry, group);
 }
 
-static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode, __u32 mask)
+static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode,
+                                      __u32 mask, int data_type)
 {
         struct fsnotify_mark_entry *entry;
         bool send;
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index e25284371020..61aed0c54fe9 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -84,7 +84,8 @@ struct fsnotify_event_private_data;
  *              valid group and inode to use to clean up.
  */
 struct fsnotify_ops {
-        bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode, __u32 mask);
+        bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode,
+                                  __u32 mask, int data_type);
         int (*handle_event)(struct fsnotify_group *group, struct fsnotify_event *event);
         void (*free_group_priv)(struct fsnotify_group *group);
         void (*freeing_mark)(struct fsnotify_mark_entry *entry, struct fsnotify_group *group);
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index a164600dd82e..b5417cd65216 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -919,7 +919,8 @@ static void audit_tree_freeing_mark(struct fsnotify_mark_entry *entry, struct fs
         fsnotify_put_mark(entry);
 }
 
-static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *inode, __u32 mask)
+static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *inode,
+                                  __u32 mask, int data_type)
 {
         return 0;
 }
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index f8543a41115b..67d8f2f52874 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -505,7 +505,8 @@ void audit_remove_watch_rule(struct audit_krule *krule)
         }
 }
 
-static bool audit_watch_should_send_event(struct fsnotify_group *group, struct inode *inode, __u32 mask)
+static bool audit_watch_should_send_event(struct fsnotify_group *group, struct inode *inode,
+                                          __u32 mask, int data_type)
 {
         struct fsnotify_mark_entry *entry;
         bool send;