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Message-Id: <1243893048-17031-14-git-send-email-ebiederm@xmission.com>
Date: Mon, 1 Jun 2009 14:50:39 -0700
From: "Eric W. Biederman" <ebiederm@...ssion.com>
To: Al Viro <viro@...IV.linux.org.uk>
Cc: <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
<linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>,
Hugh Dickins <hugh@...itas.com>, Tejun Heo <tj@...nel.org>,
Alexey Dobriyan <adobriyan@...il.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Alan Cox <alan@...rguk.ukuu.org.uk>,
Greg Kroah-Hartman <gregkh@...e.de>,
Nick Piggin <npiggin@...e.de>,
Andrew Morton <akpm@...ux-foundation.org>,
Christoph Hellwig <hch@...radead.org>,
"Eric W. Biederman" <ebiederm@...well.arastra.com>,
"Eric W. Biederman" <ebiederm@...stanetworks.com>
Subject: [PATCH 14/23] vfs: Teach flock to use file_hotplug_lock
From: Eric W. Biederman <ebiederm@...well.arastra.com>
Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
---
fs/locks.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index ec3deea..f74794e 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1584,9 +1584,13 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd)
!(filp->f_mode & (FMODE_READ|FMODE_WRITE)))
goto out_putf;
+ error = -EIO;
+ if (!file_hotplug_read_trylock(filp))
+ goto out_putf;
+
error = flock_make_lock(filp, &lock, cmd);
if (error)
- goto out_putf;
+ goto out_unlock;
if (can_sleep)
lock->fl_flags |= FL_SLEEP;
@@ -1604,6 +1608,8 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd)
out_free:
locks_free_lock(lock);
+ out_unlock:
+ file_hotplug_read_unlock(filp);
out_putf:
fput(filp);
out:
--
1.6.3.1.54.g99dd.dirty
--
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