libceph: support for subscribing to "mdsmap.<id>" maps
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index 72a910b..37c38a7 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -260,20 +260,26 @@
BUG_ON(num < 1); /* monmap sub is always there */
ceph_encode_32(&p, num);
for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
- const char *s = ceph_sub_str[i];
+ char buf[32];
+ int len;
if (!monc->subs[i].want)
continue;
- dout("%s %s start %llu flags 0x%x\n", __func__, s,
+ len = sprintf(buf, "%s", ceph_sub_str[i]);
+ if (i == CEPH_SUB_MDSMAP &&
+ monc->fs_cluster_id != CEPH_FS_CLUSTER_ID_NONE)
+ len += sprintf(buf + len, ".%d", monc->fs_cluster_id);
+
+ dout("%s %s start %llu flags 0x%x\n", __func__, buf,
le64_to_cpu(monc->subs[i].item.start),
monc->subs[i].item.flags);
- ceph_encode_string(&p, end, s, strlen(s));
+ ceph_encode_string(&p, end, buf, len);
memcpy(p, &monc->subs[i].item, sizeof(monc->subs[i].item));
p += sizeof(monc->subs[i].item);
}
- BUG_ON(p != (end - 35 - (ARRAY_SIZE(monc->subs) - num) * 19));
+ BUG_ON(p > end);
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
ceph_msg_revoke(msg);
@@ -948,7 +954,7 @@
if (!monc->m_subscribe_ack)
goto out_auth;
- monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS,
+ monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 128, GFP_NOFS,
true);
if (!monc->m_subscribe)
goto out_subscribe_ack;
@@ -974,6 +980,8 @@
monc->generic_request_tree = RB_ROOT;
monc->last_tid = 0;
+ monc->fs_cluster_id = CEPH_FS_CLUSTER_ID_NONE;
+
return 0;
out_auth_reply: