linux-kernel - [PATCH 2/3] inotify: tail drop inotify q

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Date:	Sun, 16 Aug 2009 21:51:49 -0400
From:	Eric Paris <eparis@...hat.com>
To:	linux-kernel@...r.kernel.org, fs-devel@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, viro@...IV.linux.org.uk
Subject: [PATCH 2/3] inotify: tail drop inotify q_overflow events

In f44aebcc the tail drop logic of events with no file backing
(q_overflow and in_ignored) was reversed so IN_IGNORED events would never
be tail dropped.  This now means that Q_OVERFLOW events are NOT tail
dropped.  The fix is to not tail drop IN_IGNORED, but to tail drop
Q_OVERFLOW.

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

 fs/notify/notification.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 74b3cf3..3816d57 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -153,6 +153,10 @@ static bool event_compare(struct fsnotify_event *old, struct fsnotify_event *new
 				return true;
 			break;
 		case (FSNOTIFY_EVENT_NONE):
+			if (old->mask & FS_Q_OVERFLOW)
+				return true;
+			else if (old->mask & FS_IN_IGNORED)
+				return false;
 			return false;
 		};
 	}

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