From: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
This puts all the common code in a single place for the
walk_client_list() functions.
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
---
fs/nfs/nfs4client.c | 119 ++++++++++++++++++++++++----------------------------
1 file changed, 55 insertions(+), 64 deletions(-)
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 4f4f179cb849..8853c32eedf5 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -469,6 +469,50 @@ static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2)
return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0;
}
+static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new,
+ struct nfs_client **prev, struct nfs_net *nn)
+{
+ int status;
+
+ if (pos->rpc_ops != new->rpc_ops)
+ return 1;
+
+ if (pos->cl_minorversion != new->cl_minorversion)
+ return 1;
+
+ /* If "pos" isn't marked ready, we can't trust the
+ * remaining fields in "pos", especially the client
+ * ID and serverowner fields. Wait for CREATE_SESSION
+ * to finish. */
+ if (pos->cl_cons_state > NFS_CS_READY) {
+ atomic_inc(&pos->cl_count);
+ spin_unlock(&nn->nfs_client_lock);
+
+ nfs_put_client(*prev);
+ *prev = pos;
+
+ status = nfs_wait_client_init_complete(pos);
+ spin_lock(&nn->nfs_client_lock);
+
+ if (status < 0)
+ return status;
+ }
+
+ if (pos->cl_cons_state != NFS_CS_READY)
+ return 1;
+
+ if (pos->cl_clientid != new->cl_clientid)
+ return 1;
+
+ /* NFSv4.1 always uses the uniform string, however someone
+ * might switch the uniquifier string on us.
+ */
+ if (!nfs4_match_client_owner_id(pos, new))
+ return 1;
+
+ return 0;
+}
+
/**
* nfs40_walk_client_list - Find server that recognizes a client ID
*
@@ -497,34 +541,10 @@ int nfs40_walk_client_list(struct nfs_client *new,
spin_lock(&nn->nfs_client_lock);
list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
- if (pos->rpc_ops != new->rpc_ops)
- continue;
-
- if (pos->cl_minorversion != new->cl_minorversion)
- continue;
-
- /* If "pos" isn't marked ready, we can't trust the
- * remaining fields in "pos" */
- if (pos->cl_cons_state > NFS_CS_READY) {
- atomic_inc(&pos->cl_count);
- spin_unlock(&nn->nfs_client_lock);
-
- nfs_put_client(prev);
- prev = pos;
-
- status = nfs_wait_client_init_complete(pos);
- if (status < 0)
- goto out;
- status = -NFS4ERR_STALE_CLIENTID;
- spin_lock(&nn->nfs_client_lock);
- }
- if (pos->cl_cons_state != NFS_CS_READY)
- continue;
-
- if (pos->cl_clientid != new->cl_clientid)
- continue;
-
- if (!nfs4_match_client_owner_id(pos, new))
+ status = nfs4_match_client(pos, new, &prev, nn);
+ if (status < 0)
+ goto out_unlock;
+ if (status != 0)
continue;
/*
* We just sent a new SETCLIENTID, which should have
@@ -567,11 +587,13 @@ int nfs40_walk_client_list(struct nfs_client *new,
*/
nfs4_schedule_path_down_recovery(pos);
default:
+ spin_lock(&nn->nfs_client_lock);
goto out;
}
spin_lock(&nn->nfs_client_lock);
}
+out_unlock:
spin_unlock(&nn->nfs_client_lock);
/* No match found. The server lost our clientid */
@@ -704,33 +726,10 @@ int nfs41_walk_client_list(struct nfs_client *new,
if (pos == new)
goto found;
- if (pos->rpc_ops != new->rpc_ops)
- continue;
-
- if (pos->cl_minorversion != new->cl_minorversion)
- continue;
-
- /* If "pos" isn't marked ready, we can't trust the
- * remaining fields in "pos", especially the client
- * ID and serverowner fields. Wait for CREATE_SESSION
- * to finish. */
- if (pos->cl_cons_state > NFS_CS_READY) {
- atomic_inc(&pos->cl_count);
- spin_unlock(&nn->nfs_client_lock);
-
- nfs_put_client(prev);
- prev = pos;
-
- status = nfs_wait_client_init_complete(pos);
- spin_lock(&nn->nfs_client_lock);
- if (status < 0)
- break;
- status = -NFS4ERR_STALE_CLIENTID;
- }
- if (pos->cl_cons_state != NFS_CS_READY)
- continue;
-
- if (pos->cl_clientid != new->cl_clientid)
+ status = nfs4_match_client(pos, new, &prev, nn);
+ if (status < 0)
+ goto out;
+ if (status != 0)
continue;
/*
@@ -742,23 +741,15 @@ int nfs41_walk_client_list(struct nfs_client *new,
new->cl_serverowner))
continue;
- /* Unlike NFSv4.0, we know that NFSv4.1 always uses the
- * uniform string, however someone might switch the
- * uniquifier string on us.
- */
- if (!nfs4_match_client_owner_id(pos, new))
- continue;
found:
atomic_inc(&pos->cl_count);
*result = pos;
status = 0;
- dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
- __func__, pos, atomic_read(&pos->cl_count));
break;
}
+out:
spin_unlock(&nn->nfs_client_lock);
- dprintk("NFS: <-- %s status = %d\n", __func__, status);
nfs_put_client(prev);
return status;
}
--
2.12.2
--
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