diff mbox series

NFSv4: Fix a regression in nfs_set_open_stateid_locked()

Message ID 20211027021721.58935-1-trondmy@kernel.org (mailing list archive)
State New, archived
Headers show
Series NFSv4: Fix a regression in nfs_set_open_stateid_locked() | expand

Commit Message

Trond Myklebust Oct. 27, 2021, 2:17 a.m. UTC 
From: Trond Myklebust <trond.myklebust@hammerspace.com>

If we already hold open state on the client, yet the server gives us a
completely different stateid to the one we already hold, then we
currently treat it as if it were an out-of-sequence update, and wait for
5 seconds for other updates to come in.
This commit fixes the behaviour so that we immediately start processing
of the new stateid, and then leave it to the call to
nfs4_test_and_free_stateid() to decide what to do with the old stateid.

Fixes: b4868b44c562 ("NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4proc.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1c485edf1d07..1c94f54cab58 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1604,15 +1604,16 @@  static bool nfs_stateid_is_sequential(struct nfs4_state *state,
 {
 	if (test_bit(NFS_OPEN_STATE, &state->flags)) {
 		/* The common case - we're updating to a new sequence number */
-		if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
-			nfs4_stateid_is_next(&state->open_stateid, stateid)) {
-			return true;
+		if (nfs4_stateid_match_other(stateid, &state->open_stateid)) {
+			if (nfs4_stateid_is_next(&state->open_stateid, stateid))
+				return true;
+			return false;
 		}
-	} else {
-		/* This is the first OPEN in this generation */
-		if (stateid->seqid == cpu_to_be32(1))
-			return true;
+		/* The server returned a new stateid */
 	}
+	/* This is the first OPEN in this generation */
+	if (stateid->seqid == cpu_to_be32(1))
+		return true;
 	return false;
 }