[v6,16/29] NFSv4: Ensure we don't re-test revoked and freed stateids
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Message ID 1474390571-17106-17-git-send-email-trond.myklebust@primarydata.com
State New
Headers show

Commit Message

Trond Myklebust Sept. 20, 2016, 4:55 p.m. UTC
This fixes a potential infinite loop in nfs_reap_expired_delegations.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfs/delegation.c | 3 +++
 1 file changed, 3 insertions(+)

Patch
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diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 0ffead281555..484f14700108 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -656,6 +656,7 @@  static void nfs_mark_delegation_revoked(struct nfs_server *server,
 		struct nfs_delegation *delegation)
 {
 	set_bit(NFS_DELEGATION_REVOKED, &delegation->flags);
+	delegation->stateid.type = NFS4_INVALID_STATEID_TYPE;
 	nfs_mark_return_delegation(server, delegation);
 }
 
@@ -894,6 +895,8 @@  static inline bool nfs4_server_rebooted(const struct nfs_client *clp)
 static void nfs_mark_test_expired_delegation(struct nfs_server *server,
 	    struct nfs_delegation *delegation)
 {
+	if (delegation->stateid.type == NFS4_INVALID_STATEID_TYPE)
+		return;
 	clear_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags);
 	set_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags);
 	set_bit(NFS4CLNT_DELEGATION_EXPIRED, &server->nfs_client->cl_state);