From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Ensure that nfsd4_process_open2() keeps a reference to the delegation
stateid until it is done working with it. Necessary step toward
client_mutex removal.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 053186bd7e6c..f825c055e62b 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3340,6 +3340,8 @@ static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, statei
ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
if (!ret)
return NULL;
+ /* FIXME: move into find_stateid_by_type */
+ atomic_inc(&ret->sc_count);
return delegstateid(ret);
}
@@ -3355,14 +3357,18 @@ nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
{
int flags;
__be32 status = nfserr_bad_stateid;
+ struct nfs4_delegation *deleg;
- *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
- if (*dp == NULL)
+ deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
+ if (deleg == NULL)
goto out;
flags = share_access_to_flags(open->op_share_access);
- status = nfs4_check_delegmode(*dp, flags);
- if (status)
- *dp = NULL;
+ status = nfs4_check_delegmode(deleg, flags);
+ if (status) {
+ nfs4_put_delegation(deleg);
+ goto out;
+ }
+ *dp = deleg;
out:
if (!nfsd4_is_deleg_cur(open))
return nfs_ok;
@@ -3826,6 +3832,8 @@ out:
if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
!nfsd4_has_session(&resp->cstate))
open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
+ if (dp)
+ nfs4_put_delegation(dp);
return status;
}
--
1.9.3
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