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NFSv4: Ensure we don't re-test revoked and freed stateids

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This fixes a potential infinite loop in nfs_reap_expired_delegations.

Signed-off-by: Trond Myklebust <[email protected]>
Tested-by: Oleg Drokin <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>
This commit is contained in:
Trond Myklebust 2016-09-22 13:39:06 -04:00 • committed by Anna Schumaker
commit 059b43e974
1 changed files with 3 additions and 0 deletions
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3
fs/nfs/delegation.c
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@ -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);