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From: Trond Myklebust <trondmy@gmail.com>
To: Anna Schumaker <Anna.Schumaker@netapp.com>
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH 9/9] NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU
Date: Mon,  9 Sep 2019 10:01:04 -0400
Message-ID: <20190909140104.78818-9-trond.myklebust@hammerspace.com> (raw)
In-Reply-To: <20190909140104.78818-8-trond.myklebust@hammerspace.com>

If a LOCKU request receives a NFS4ERR_OLD_STATEID, then bump the
seqid before resending. Ensure we only bump the seqid by 1.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4proc.c | 47 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 49f301198008..ecfaf4b1ba5d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6377,6 +6377,42 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *
 	return err;
 }
 
+/*
+ * Update the seqid of a lock stateid after receiving
+ * NFS4ERR_OLD_STATEID
+ */
+static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
+		struct nfs4_lock_state *lsp)
+{
+	struct nfs4_state *state = lsp->ls_state;
+	bool ret = false;
+
+	spin_lock(&state->state_lock);
+	if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
+		goto out;
+	if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
+		nfs4_stateid_seqid_inc(dst);
+	else
+		dst->seqid = lsp->ls_stateid.seqid;
+	ret = true;
+out:
+	spin_unlock(&state->state_lock);
+	return ret;
+}
+
+static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
+		struct nfs4_lock_state *lsp)
+{
+	struct nfs4_state *state = lsp->ls_state;
+	bool ret;
+
+	spin_lock(&state->state_lock);
+	ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
+	nfs4_stateid_copy(dst, &lsp->ls_stateid);
+	spin_unlock(&state->state_lock);
+	return ret;
+}
+
 struct nfs4_unlockdata {
 	struct nfs_locku_args arg;
 	struct nfs_locku_res res;
@@ -6448,10 +6484,14 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
 					task->tk_msg.rpc_cred);
 			/* Fall through */
 		case -NFS4ERR_BAD_STATEID:
-		case -NFS4ERR_OLD_STATEID:
 		case -NFS4ERR_STALE_STATEID:
-			if (!nfs4_stateid_match(&calldata->arg.stateid,
-						&calldata->lsp->ls_stateid))
+			if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
+						calldata->lsp))
+				rpc_restart_call_prepare(task);
+			break;
+		case -NFS4ERR_OLD_STATEID:
+			if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
+						calldata->lsp))
 				rpc_restart_call_prepare(task);
 			break;
 		default:
@@ -6474,7 +6514,6 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data)
 
 	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
 		goto out_wait;
-	nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
 	if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
 		/* Note: exit _without_ running nfs4_locku_done */
 		goto out_no_action;
-- 
2.21.0


  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-09 14:00 [PATCH 1/9] pNFS: Ensure we do clear the return-on-close layout stateid on fatal errors Trond Myklebust
2019-09-09 14:00 ` [PATCH 2/9] NFSv4: Clean up pNFS return-on-close error handling Trond Myklebust
2019-09-09 14:00   ` [PATCH 3/9] NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close Trond Myklebust
2019-09-09 14:00     ` [PATCH 4/9] NFSv4: Handle RPC level errors in LAYOUTRETURN Trond Myklebust
2019-09-09 14:01       ` [PATCH 5/9] NFSv4: Add a helper to increment stateid seqids Trond Myklebust
2019-09-09 14:01         ` [PATCH 6/9] pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid Trond Myklebust
2019-09-09 14:01           ` [PATCH 7/9] NFSv4: Fix OPEN_DOWNGRADE error handling Trond Myklebust
2019-09-09 14:01             ` [PATCH 8/9] NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE Trond Myklebust
2019-09-09 14:01               ` Trond Myklebust [this message]
2019-09-16 19:37                 ` [PATCH 9/9] NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU Olga Kornievskaia
2019-09-11 20:13               ` [PATCH 8/9] NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE Olga Kornievskaia
2019-09-11 20:56                 ` Trond Myklebust
2019-09-12 15:01                   ` Olga Kornievskaia
2019-09-12 15:04                     ` Olga Kornievskaia
2019-09-16 19:39                     ` Olga Kornievskaia
2019-09-12 15:14           ` [PATCH 6/9] pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid Olga Kornievskaia
2019-09-12 16:29             ` Trond Myklebust

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