linux-kernel - Re: find: WARNING: Hard link count is wrong for /proc/1

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Date:	Mon, 2 Jun 2008 09:00:56 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Pavel Emelyanov" <xemul@...nvz.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: find: WARNING: Hard link count is wrong for /proc/1

On Mon, Jun 2, 2008 at 8:31 AM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> Hi,
>
> 2.6.26-rc4 seems to exhibit the following (new since at least 2.6.24)
> warning when running find /proc/1:
>
> find: WARNING: Hard link count is wrong for /proc/1: this may be a bug
> in your filesystem driver.  Automatically turning on find's -noleaf
> option.  Earlier results may have failed to include directories that
> should have been searched.

My prime suspect is

commit e9720acd728a46cb40daa52c99a979f7c4ff195c
Author: Pavel Emelyanov <xemul@...nvz.org>
Date:   Fri Mar 7 11:08:40 2008 -0800

    [NET]: Make /proc/net a symlink on /proc/self/net (v3)


as this patch introduces a new directory entry without bumping the nlink count.

Will this do? (Untested)

Vegard


>From a43ef05a8c1f8d45ca88e00fdd31c00ddfdba1b8 Mon Sep 17 00:00:00 2001
From: Vegard Nossum <vegard.nossum@...il.com>
Date: Mon, 2 Jun 2008 08:57:45 +0200
Subject: [PATCH] proc: fix /proc/<pid> link count

commit e9720acd728a46cb40daa52c99a979f7c4ff195c
Author: Pavel Emelyanov <xemul@...nvz.org>
Date:   Fri Mar 7 11:08:40 2008 -0800

    [NET]: Make /proc/net a symlink on /proc/self/net (v3)

introduced /proc/net without bumping the link count on /proc/self.

Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
---
 fs/proc/base.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index c447e07..10ee4a2 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2589,6 +2589,9 @@ static struct dentry
*proc_pid_instantiate(struct inode *dir,
 #ifdef CONFIG_SECURITY
 	inode->i_nlink += 1;
 #endif
+#ifdef CONFIG_NET
+	inode->i_nlink += 1;
+#endif

 	dentry->d_op = &pid_dentry_operations;

-- 
1.5.4.1
--
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