The patch titled
Subject: ocfs2: optimize error handling in dlm_request_join
has been added to the -mm tree. Its filename is
ocfs2-optimize-error-handling-in-dlm_request_join.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-optimize-error-handling-in-dlm_request_join.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-optimize-error-handling-in-dlm_request_join.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Norton.Zhu" <norton.zhu@xxxxxxxxxx>
Subject: ocfs2: optimize error handling in dlm_request_join
Currently error handling in dlm_request_join is a little obscure, so
optimize it to promote readability.
If packet.code is invalid, reset it to JOIN_DISALLOW to keep it meaningful.
It only influences the log printing.
Signed-off-by: Norton.Zhu <norton.zhu@xxxxxxxxxx>
Cc: Srinivas Eeda <srinivas.eeda@xxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlm/dlmdomain.c | 71 ++++++++++++++++++++-----------------
1 file changed, 39 insertions(+), 32 deletions(-)
diff -puN fs/ocfs2/dlm/dlmdomain.c~ocfs2-optimize-error-handling-in-dlm_request_join fs/ocfs2/dlm/dlmdomain.c
--- a/fs/ocfs2/dlm/dlmdomain.c~ocfs2-optimize-error-handling-in-dlm_request_join
+++ a/fs/ocfs2/dlm/dlmdomain.c
@@ -1465,39 +1465,46 @@ static int dlm_request_join(struct dlm_c
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);
+ /* Reset response to JOIN_DISALLOW */
+ *response = JOIN_DISALLOW;
+ break;
+ }
}
mlog(0, "status %d, node %d response is %d\n", status, node,
_
Patches currently in -mm which might be from norton.zhu@xxxxxxxxxx are
ocfs2-optimize-error-handling-in-dlm_request_join.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
