fsnotify: add pr_debug throughout

It can be hard to debug fsnotify since there are so few printks.  Use
pr_debug to allow for dynamic debugging.

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

2 files changed, 16 insertions, 0 deletions

diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 9d332e7f5a5c..906b72761b17 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -98,6 +98,9 @@ static int inotify_handle_event(struct fsnotify_group *group, struct fsnotify_ev
         struct fsnotify_event_private_data *fsn_event_priv;
         int wd, ret;
 
+        pr_debug("%s: group=%p event=%p to_tell=%p mask=%x\n", __func__, group,
+                 event, event->to_tell, event->mask);
+
         to_tell = event->to_tell;
 
         fsn_mark = fsnotify_find_inode_mark(group, to_tell);
@@ -151,6 +154,9 @@ static bool inotify_should_send_event(struct fsnotify_group *group, struct inode
         struct fsnotify_mark *fsn_mark;
         bool send;
 
+        pr_debug("%s: group=%p inode=%p mask=%x data=%p data_type=%d\n",
+                 __func__, group, inode, mask, data, data_type);
+
         fsn_mark = fsnotify_find_inode_mark(group, inode);
         if (!fsn_mark)
                 return false;
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 7dc940c869b6..1068e1ca9cb0 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -141,6 +141,8 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
 
         event = fsnotify_peek_notify_event(group);
 
+        pr_debug("%s: group=%p event=%p\n", __func__, group, event);
+
         if (event->name_len)
                 event_size += roundup(event->name_len + 1, event_size);
 
@@ -170,6 +172,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
         size_t event_size = sizeof(struct inotify_event);
         size_t name_len = 0;
 
+        pr_debug("%s: group=%p event=%p\n", __func__, group, event);
+
         /* we get the inotify watch descriptor from the event private data */
         spin_lock(&event->lock);
         fsn_priv = fsnotify_remove_priv_from_event(group, event);
@@ -242,6 +246,8 @@ static ssize_t inotify_read(struct file *file, char __user *buf,
                 kevent = get_one_event(group, count);
                 mutex_unlock(&group->notification_mutex);
 
+                pr_debug("%s: group=%p kevent=%p\n", __func__, group, kevent);
+
                 if (kevent) {
                         ret = PTR_ERR(kevent);
                         if (IS_ERR(kevent))
@@ -286,6 +292,8 @@ static int inotify_release(struct inode *ignored, struct file *file)
         struct fsnotify_group *group = file->private_data;
         struct user_struct *user = group->inotify_data.user;
 
+        pr_debug("%s: group=%p\n", __func__, group);
+
         fsnotify_clear_marks_by_group(group);
 
         /* free this group, matching get was inotify_init->fsnotify_obtain_group */
@@ -309,6 +317,8 @@ static long inotify_ioctl(struct file *file, unsigned int cmd,
         group = file->private_data;
         p = (void __user *) arg;
 
+        pr_debug("%s: group=%p cmd=%u\n", __func__, group, cmd);
+
         switch (cmd) {
         case FIONREAD:
                 mutex_lock(&group->notification_mutex);