static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
{
int rc = 0;
u32 dlm_key;
struct dlm_ctxt *dlm;
struct o2dlm_private *priv;
struct dlm_protocol_version fs_version;
BUG_ON(conn == NULL);
BUG_ON(conn->cc_proto == NULL);
/* for now we only have one cluster/node, make sure we see it
* in the heartbeat universe */
if (!o2hb_check_local_node_heartbeating()) {
if (o2hb_global_heartbeat_active())
mlog(ML_ERROR, "Global heartbeat not started\n");
rc = -EINVAL;
goto out;
}
priv = kzalloc(sizeof(struct o2dlm_private), GFP_KERNEL);
if (!priv) {
rc = -ENOMEM;
goto out_free;
}
/* This just fills the structure in. It is safe to pass conn. */
dlm_setup_eviction_cb(&priv->op_eviction_cb, o2dlm_eviction_cb,
conn);
conn->cc_private = priv;
/* used by the dlm code to make message headers unique, each
* node in this domain must agree on this. */
dlm_key = crc32_le(0, conn->cc_name, conn->cc_namelen);
fs_version.pv_major = conn->cc_version.pv_major;
fs_version.pv_minor = conn->cc_version.pv_minor;
dlm = dlm_register_domain(conn->cc_name, dlm_key, &fs_version);
if (IS_ERR(dlm)) {
rc = PTR_ERR(dlm);
mlog_errno(rc);
goto out_free;
}
conn->cc_version.pv_major = fs_version.pv_major;
conn->cc_version.pv_minor = fs_version.pv_minor;
conn->cc_lockspace = dlm;
dlm_register_eviction_cb(dlm, &priv->op_eviction_cb);
out_free:
if (rc && conn->cc_private)
kfree(conn->cc_private);
out:
return rc;
}
/*
* Check if this node is heartbeating and is connected to all other
* heartbeating nodes.
*/
static int o2cb_cluster_check(void)
{
u8 node_num;
int i;
unsigned long hbmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
unsigned long netmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
node_num = o2nm_this_node();
if (node_num == O2NM_MAX_NODES) {
printk(KERN_ERR "o2cb: This node has not been configured.\n");
return -EINVAL;
}
/*
* o2dlm expects o2net sockets to be created. If not, then
* dlm_join_domain() fails with a stack of errors which are both cryptic
* and incomplete. The idea here is to detect upfront whether we have
* managed to connect to all nodes or not. If not, then list the nodes
* to allow the user to check the configuration (incorrect IP, firewall,
* etc.) Yes, this is racy. But its not the end of the world.
*/
#define O2CB_MAP_STABILIZE_COUNT 60
for (i = 0; i < O2CB_MAP_STABILIZE_COUNT; ++i) {
o2hb_fill_node_map(hbmap, sizeof(hbmap));
if (!test_bit(node_num, hbmap)) {
printk(KERN_ERR "o2cb: %s heartbeat has not been "
"started.\n", (o2hb_global_heartbeat_active() ?
"Global" : "Local"));
return -EINVAL;
}
o2net_fill_node_map(netmap, sizeof(netmap));
/* Force set the current node to allow easy compare */
set_bit(node_num, netmap);
if (!memcmp(hbmap, netmap, sizeof(hbmap)))
return 0;
if (i < O2CB_MAP_STABILIZE_COUNT)
msleep(1000);
}
printk(KERN_ERR "o2cb: This node could not connect to nodes:");
i = -1;
while ((i = find_next_bit(hbmap, O2NM_MAX_NODES,
i + 1)) < O2NM_MAX_NODES) {
if (!test_bit(i, netmap))
printk(" %u", i);
}
printk(".\n");
return -ENOTCONN;
}
