linux-kernel - [PATCH] nfs[23] tcp breakage in mount with binary options

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Date:	Thu, 24 Sep 2009 14:37:03 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Trond.Myklebust@...app.com
Cc:	linux-kernel@...r.kernel.org, Chuck Lever <chuck.lever@...cle.com>
Subject: [PATCH] nfs[23] tcp breakage in mount with binary options

We forget to set nfs_server.protocol in tcp case when old-style binary
options are passed to mount.  The thing remains zero and never validated
afterwards.  As the result, we hit BUG in fs/nfs/client.c:588.

Breakage has been introduced in NFS: Add nfs_alloc_parsed_mount_data
merged yesterday...

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 810770f..29786d3 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1711,6 +1711,8 @@ static int nfs_validate_mount_data(void *options,
 
 		if (!(data->flags & NFS_MOUNT_TCP))
 			args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+		else
+			args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
 		/* N.B. caller will free nfs_server.hostname in all cases */
 		args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
 		args->namlen		= data->namlen;
--
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