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From: NeilBrown <neilb@suse.de>
To: Chuck Lever <chuck.lever@oracle.com>,
	Jeff Layton <jlayton@kernel.org>
Cc: linux-nfs@vger.kernel.org,
	Olga Kornievskaia <kolga@netapp.com>,
	Dai Ngo <Dai.Ngo@oracle.com>,
	Tom Talpey <tom@talpey.com>
Subject: [PATCH 1/3] nfsd: move nfsd4_cstate_assign_replay() earlier in open handling.
Date: Fri,  1 Mar 2024 11:07:37 +1100
Message-ID: <20240301000950.2306-2-neilb@suse.de>
In-Reply-To: <20240301000950.2306-1-neilb@suse.de>
References: <20240301000950.2306-1-neilb@suse.de>
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Rather than taking the rp_mutex in nfsd4_cleanup_open_state() (which
seems counter-intuitive), take it and assign rp_owner as soon as
possible.

This will support a future change when nfsd4_cstate_assign_replay() might
fail.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 fs/nfsd/nfs4state.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 7d6c657e0409..e625f738f7b0 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5066,15 +5066,15 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
 	strhashval = ownerstr_hashval(&open->op_owner);
 	oo = find_openstateowner_str(strhashval, open, clp);
 	open->op_openowner = oo;
-	if (!oo) {
+	if (!oo)
 		goto new_owner;
-	}
 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
 		/* Replace unconfirmed owners without checking for replay. */
 		release_openowner(oo);
 		open->op_openowner = NULL;
 		goto new_owner;
 	}
+	nfsd4_cstate_assign_replay(cstate, &oo->oo_owner);
 	status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
 	if (status)
 		return status;
@@ -5084,6 +5084,7 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
 	if (oo == NULL)
 		return nfserr_jukebox;
 	open->op_openowner = oo;
+	nfsd4_cstate_assign_replay(cstate, &oo->oo_owner);
 alloc_stateid:
 	open->op_stp = nfs4_alloc_open_stateid(clp);
 	if (!open->op_stp)
@@ -5835,12 +5836,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
 void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
 			      struct nfsd4_open *open)
 {
-	if (open->op_openowner) {
-		struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
-
-		nfsd4_cstate_assign_replay(cstate, so);
-		nfs4_put_stateowner(so);
-	}
+	if (cstate->replay_owner)
+		nfs4_put_stateowner(cstate->replay_owner);
 	if (open->op_file)
 		kmem_cache_free(file_slab, open->op_file);
 	if (open->op_stp)
-- 
2.43.0