From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Sun, 8 Jul 2007 16:49:11 -0400
NFSv4: Improve the debugging of bad sequence id errors...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

 fs/nfs/nfs4proc.c  |    4 +++-
 fs/nfs/nfs4state.c |    7 +++++++
 2 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 128fe23..3b59c5d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1079,7 +1079,9 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int
 		 * the user though...
 		 */
 		if (status == -NFS4ERR_BAD_SEQID) {
-			printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
+			printk(KERN_WARNING "NFS: v4 server %s "
+					" returned a bad sequence-id error!\n",
+					NFS_SERVER(dir)->nfs_client->cl_hostname);
 			exception.retry = 1;
 			continue;
 		}
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 4f78c0d..4fa4054 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -38,6 +38,7 @@
  * subsequent patch.
  */
 
+#include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/smp_lock.h>
 #include <linux/nfs_fs.h>
@@ -648,6 +649,12 @@ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
 		case 0:
 			break;
 		case -NFS4ERR_BAD_SEQID:
+			if (seqid->sequence->flags & NFS_SEQID_CONFIRMED)
+				return;
+			printk(KERN_WARNING "NFS: v4 server returned a bad"
+					"sequence-id error on an"
+					"unconfirmed sequence %p!\n",
+					seqid->sequence);
 		case -NFS4ERR_STALE_CLIENTID:
 		case -NFS4ERR_STALE_STATEID:
 		case -NFS4ERR_BAD_STATEID: