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fsnotify: fsnotify_add_notify_event should return an event

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Rather than the horrific void ** argument and such just to pass the
fanotify_merge event back to the caller of fsnotify_add_notify_event() have
those things return an event if it was different than the event suggusted to
be added.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2010-07-28 10:18:37 -04:00
parent 5ba08e2eeb
commit f70ab54cc6
5 changed files with 101 additions and 95 deletions
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28
fs/notify/inotify/inotify_fsnotify.c
View File

@@ -68,13 +68,11 @@ static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new
return false;
}
static int inotify_merge(struct list_head *list,
struct fsnotify_event *event,
void **arg)
static struct fsnotify_event *inotify_merge(struct list_head *list,
struct fsnotify_event *event)
{
struct fsnotify_event_holder *last_holder;
struct fsnotify_event *last_event;
int ret = 0;
/* and the list better be locked by something too */
spin_lock(&event->lock);
@@ -82,11 +80,13 @@ static int inotify_merge(struct list_head *list,
last_holder = list_entry(list->prev, struct fsnotify_event_holder, event_list);
last_event = last_holder->event;
if (event_compare(last_event, event))
ret = -EEXIST;
fsnotify_get_event(last_event);
else
last_event = NULL;
spin_unlock(&event->lock);
return ret;
return last_event;
}
static int inotify_handle_event(struct fsnotify_group *group, struct fsnotify_event *event)
@@ -96,7 +96,8 @@ static int inotify_handle_event(struct fsnotify_group *group, struct fsnotify_ev
struct inode *to_tell;
struct inotify_event_private_data *event_priv;
struct fsnotify_event_private_data *fsn_event_priv;
int wd, ret;
struct fsnotify_event *added_event;
int wd, ret = 0;
pr_debug("%s: group=%p event=%p to_tell=%p mask=%x\n", __func__, group,
event, event->to_tell, event->mask);
@@ -120,14 +121,13 @@ static int inotify_handle_event(struct fsnotify_group *group, struct fsnotify_ev
fsn_event_priv->group = group;
event_priv->wd = wd;
ret = fsnotify_add_notify_event(group, event, fsn_event_priv, inotify_merge, NULL);
if (ret) {
added_event = fsnotify_add_notify_event(group, event, fsn_event_priv, inotify_merge);
if (added_event) {
inotify_free_event_priv(fsn_event_priv);
/* EEXIST says we tail matched, EOVERFLOW isn't something
* to report up the stack. */
if ((ret == -EEXIST) ||
(ret == -EOVERFLOW))
ret = 0;
if (!IS_ERR(added_event))
fsnotify_put_event(added_event);
else
ret = PTR_ERR(added_event);
}
if (fsn_mark->mask & IN_ONESHOT)

11
fs/notify/inotify/inotify_user.c
View File

@@ -516,7 +516,7 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
struct fsnotify_group *group)
{
struct inotify_inode_mark *i_mark;
struct fsnotify_event *ignored_event;
struct fsnotify_event *ignored_event, *notify_event;
struct inotify_event_private_data *event_priv;
struct fsnotify_event_private_data *fsn_event_priv;
int ret;
@@ -538,9 +538,14 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
fsn_event_priv->group = group;
event_priv->wd = i_mark->wd;
ret = fsnotify_add_notify_event(group, ignored_event, fsn_event_priv, NULL, NULL);
if (ret)
notify_event = fsnotify_add_notify_event(group, ignored_event, fsn_event_priv, NULL);
if (notify_event) {
if (IS_ERR(notify_event))
ret = PTR_ERR(notify_event);
else
fsnotify_put_event(notify_event);
inotify_free_event_priv(fsn_event_priv);
}
skip_send_ignore: