linux-kernel - [PATCH] autofs4 - fix direct mount pending expire race

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Message-ID: <20080718031453.12148.79135.stgit@raven.themaw.net>
Date:	Fri, 18 Jul 2008 11:14:54 +0800
From:	Ian Kent <raven@...maw.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	autofs mailing list <autofs@...ux.kernel.org>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Al Viro <viro@...IV.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH] autofs4 - fix direct mount pending expire race - correction

Appologies, somehow I seem to have sent an out dated version of this
patch. Here is an additional patch that brings the patch up to date.

Signed-off-by: Ian Kent <raven@...maw.net>

---

 fs/autofs4/root.c |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)


diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index b1536c1..7a7ed94 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -190,13 +190,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
 			/* Follow down to our covering mount. */
 			if (!follow_down(&nd->path.mnt, &nd->path.dentry))
 				goto done;
-			/*
-			 * We shouldn't need to do this but we have no way
-			 * of knowing what may have been done so try a follow
-			 * just in case.
-			 */
-			autofs4_follow_mount(&nd->path.mnt, &nd->path.dentry);
-			goto done;
+			goto follow;
 		}
 		spin_unlock(&sbi->fs_lock);
 		goto done;
@@ -208,7 +202,7 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
 	/* We trigger a mount for almost all flags */
 	lookup_type = nd->flags & (TRIGGER_FLAGS | TRIGGER_INTENTS);
 	if (!(lookup_type || dentry->d_flags & DCACHE_AUTOFS_PENDING))
-		goto done;
+		goto follow;
 
 	/*
 	 * If the dentry contains directories then it is an autofs
--
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