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[v1,036/104] NFSd: Ensure that nfs4_open_delegation() references the delegation stateid

Message ID 1403189450-18729-37-git-send-email-jlayton@primarydata.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jeff Layton June 19, 2014, 2:49 p.m. UTC 
From: Trond Myklebust <trond.myklebust@primarydata.com>

Ensure that nfs4_open_delegation() keeps a reference to the delegation
stateid until it is done working with it.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfsd/nfs4state.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 08425b1bc3b1..cf3b19bb5839 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -589,6 +589,7 @@  hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
 	lockdep_assert_held(&state_lock);
 	lockdep_assert_held(&fp->fi_lock);
 
+	atomic_inc(&dp->dl_stid.sc_count);
 	dp->dl_stid.sc_type = NFS4_DELEG_STID;
 	list_add(&dp->dl_perfile, &fp->fi_delegations);
 	list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
@@ -3513,6 +3514,7 @@  nfs4_open_delegation(struct net *net, struct svc_fh *fh,
 	dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
 		STATEID_VAL(&dp->dl_stid.sc_stateid));
 	open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
+	nfs4_put_delegation(dp);
 	return;
 out_free:
 	unhash_and_destroy_delegation(dp);