#define DEBUG_SUBSYSTEM S_RPC
+#include <linux/obd_support.h>
#include <linux/lustre_net.h>
static spinlock_t conn_lock;
static struct list_head conn_list;
static struct list_head conn_unused_list;
-struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer)
+/* If UUID is NULL, c->c_remote_uuid must be all zeroes
+ * If UUID is non-NULL, c->c_remote_uuid must match. */
+static int match_connection_uuid(struct ptlrpc_connection *c, obd_uuid_t uuid)
+{
+ obd_uuid_t zero_uuid = {0};
+
+ if (uuid)
+ return memcmp(c->c_remote_uuid, uuid, sizeof(uuid));
+
+ return memcmp(c->c_remote_uuid, zero_uuid, sizeof(zero_uuid));
+}
+
+struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer,
+ obd_uuid_t uuid)
{
struct list_head *tmp, *pos;
struct ptlrpc_connection *c;
ENTRY;
+ CDEBUG(D_INFO, "peer is %08x %08lx %08lx\n",
+ peer->peer_nid, peer->peer_ni.nal_idx, peer->peer_ni.handle_idx);
+
spin_lock(&conn_lock);
list_for_each(tmp, &conn_list) {
c = list_entry(tmp, struct ptlrpc_connection, c_link);
- if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0) {
+ if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0 &&
+ !match_connection_uuid(c, uuid)) {
ptlrpc_connection_addref(c);
GOTO(out, c);
}
list_for_each_safe(tmp, pos, &conn_unused_list) {
c = list_entry(tmp, struct ptlrpc_connection, c_link);
- if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0) {
+ if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0 &&
+ !match_connection_uuid(c, uuid)) {
ptlrpc_connection_addref(c);
list_del(&c->c_link);
list_add(&c->c_link, &conn_list);
c->c_generation = 1;
c->c_epoch = 1;
c->c_bootcount = 0;
+ c->c_flags = 0;
+ if (uuid)
+ strcpy(c->c_remote_uuid, uuid);
+ INIT_LIST_HEAD(&c->c_delayed_head);
+ INIT_LIST_HEAD(&c->c_sending_head);
+ INIT_LIST_HEAD(&c->c_dying_head);
+ INIT_LIST_HEAD(&c->c_imports);
+ INIT_LIST_HEAD(&c->c_exports);
+ INIT_LIST_HEAD(&c->c_sb_chain);
+ INIT_LIST_HEAD(&c->c_recovd_data.rd_managed_chain);
atomic_set(&c->c_refcount, 0);
ptlrpc_connection_addref(c);
spin_lock_init(&c->c_lock);
int rc = 0;
ENTRY;
- CDEBUG(D_INFO, "connection=%p\n", c);
+ if (c == NULL) {
+ CERROR("NULL connection\n");
+ RETURN(0);
+ }
+
+ CDEBUG(D_INFO, "connection=%p refcount %d\n",
+ c, atomic_read(&c->c_refcount) - 1);
if (atomic_dec_and_test(&c->c_refcount)) {
spin_lock(&conn_lock);
list_del(&c->c_link);
rc = 1;
}
if (atomic_read(&c->c_refcount) < 0)
- CERROR("refcount < 0 for connection %p!\n", c);
+ CERROR("connection %p refcount %d!\n",
+ c, atomic_read(&c->c_refcount));
RETURN(rc);
}
struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *c)
{
ENTRY;
- CDEBUG(D_INFO, "connection=%p\n", c);
+ CDEBUG(D_INFO, "connection=%p refcount %d\n",
+ c, atomic_read(&c->c_refcount) + 1);
atomic_inc(&c->c_refcount);
RETURN(c);
}