[10/14] NFSv4: Update the stateid seqid in nfs_revoke_delegation()
diff mbox series

Message ID 20191023235600.10880-11-trond.myklebust@hammerspace.com
State New
Headers show
Series
  • Delegation bugfixes
Related show

Commit Message

Trond Myklebust Oct. 23, 2019, 11:55 p.m. UTC
If we revoke a delegation, but the stateid's seqid is newer, then
ensure we update the seqid when marking the delegation as revoked.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/delegation.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index b6cc2e71fcdb..5a87d32a8d7c 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -760,8 +760,19 @@  static bool nfs_revoke_delegation(struct inode *inode,
 	if (stateid == NULL) {
 		nfs4_stateid_copy(&tmp, &delegation->stateid);
 		stateid = &tmp;
-	} else if (!nfs4_stateid_match(stateid, &delegation->stateid))
-		goto out;
+	} else {
+		if (!nfs4_stateid_match_other(stateid, &delegation->stateid))
+			goto out;
+		spin_lock(&delegation->lock);
+		if (stateid->seqid) {
+			if (nfs4_stateid_is_newer(&delegation->stateid, stateid)) {
+				spin_unlock(&delegation->lock);
+				goto out;
+			}
+			delegation->stateid.seqid = stateid->seqid;
+		}
+		spin_unlock(&delegation->lock);
+	}
 	nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation);
 	ret = true;
 out: