Currently error handling in dlm_request_join is a little obscure.
So optimize it to promote readability.
Signed-off-by: Norton.Zhu <norton....@huawei.com>
---
fs/ocfs2/dlm/dlmdomain.c | 69 ++++++++++++++++++++++++++----------------------
1 file changed, 37 insertions(+), 32 deletions(-)
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 7df88a6..af4f7aa 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1465,39 +1465,44 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
if (status == -ENOPROTOOPT) {
status = 0;
*response = JOIN_OK_NO_MAP;
- } else if (packet.code == JOIN_DISALLOW ||
- packet.code == JOIN_OK_NO_MAP) {
- *response = packet.code;
- } else if (packet.code == JOIN_PROTOCOL_MISMATCH) {
- mlog(ML_NOTICE,
- "This node requested DLM locking protocol %u.%u and "
- "filesystem locking protocol %u.%u. At least one of "
- "the protocol versions on node %d is not compatible, "
- "disconnecting\n",
- dlm->dlm_locking_proto.pv_major,
- dlm->dlm_locking_proto.pv_minor,
- dlm->fs_locking_proto.pv_major,
- dlm->fs_locking_proto.pv_minor,
- node);
- status = -EPROTO;
- *response = packet.code;
- } else if (packet.code == JOIN_OK) {
- *response = packet.code;
- /* Use the same locking protocol as the remote node */
- dlm->dlm_locking_proto.pv_minor = packet.dlm_minor;
- dlm->fs_locking_proto.pv_minor = packet.fs_minor;
- mlog(0,
- "Node %d responds JOIN_OK with DLM locking protocol "
- "%u.%u and fs locking protocol %u.%u\n",
- node,
- dlm->dlm_locking_proto.pv_major,
- dlm->dlm_locking_proto.pv_minor,
- dlm->fs_locking_proto.pv_major,
- dlm->fs_locking_proto.pv_minor);
} else {
- status = -EINVAL;
- mlog(ML_ERROR, "invalid response %d from node %u\n",
- packet.code, node);
+ *response = packet.code;
+ switch (packet.code) {
+ case JOIN_DISALLOW:
+ case JOIN_OK_NO_MAP:
+ break;
+ case JOIN_PROTOCOL_MISMATCH:
+ mlog(ML_NOTICE,
+ "This node requested DLM locking protocol %u.%u
and "
+ "filesystem locking protocol %u.%u. At least one
of "
+ "the protocol versions on node %d is not
compatible, "
+ "disconnecting\n",
+ dlm->dlm_locking_proto.pv_major,
+ dlm->dlm_locking_proto.pv_minor,
+ dlm->fs_locking_proto.pv_major,
+ dlm->fs_locking_proto.pv_minor,
+ node);
+ status = -EPROTO;
+ break;
+ case JOIN_OK:
+ /* Use the same locking protocol as the remote node */
+ dlm->dlm_locking_proto.pv_minor = packet.dlm_minor;
+ dlm->fs_locking_proto.pv_minor = packet.fs_minor;
+ mlog(0,
+ "Node %d responds JOIN_OK with DLM locking
protocol "
+ "%u.%u and fs locking protocol %u.%u\n",
+ node,
+ dlm->dlm_locking_proto.pv_major,
+ dlm->dlm_locking_proto.pv_minor,
+ dlm->fs_locking_proto.pv_major,
+ dlm->fs_locking_proto.pv_minor);
+ break;
+ default:
+ status = -EINVAL;
+ mlog(ML_ERROR, "invalid response %d from node %u\n",
+ packet.code, node);
+ break;
+ }
}
mlog(0, "status %d, node %d response is %d\n", status, node,
--
1.8.4.3
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