From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Tue, 22 Oct 2019 17:40:47 +0000 (-0400)
Subject: NFSv4: Ignore requests to return the delegation if it was revoked
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=af20b7b850c5786979f773ba25dab70c85914466;p=linux.git

NFSv4: Ignore requests to return the delegation if it was revoked

If the delegation was revoked, or is already being returned, just
clear the NFS_DELEGATION_RETURN and NFS_DELEGATION_RETURN_IF_CLOSED
flags and keep going.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 8c176c9215540..ebd83e4db3002 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -476,8 +476,6 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation)
 {
 	bool ret = false;
 
-	if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
-		goto out;
 	if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags))
 		ret = true;
 	if (test_and_clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags) && !ret) {
@@ -489,7 +487,10 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation)
 			ret = true;
 		spin_unlock(&delegation->lock);
 	}
-out:
+	if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags) ||
+	    test_bit(NFS_DELEGATION_REVOKED, &delegation->flags))
+		ret = false;
+
 	return ret;
 }