-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LNET
#include <lnet/lib-lnet.h>
+#include <lnet/lib-dlc.h>
int
-lnet_create_peer_table(void)
+lnet_peer_tables_create(void)
{
- struct list_head *hash;
- int i;
-
- LASSERT (the_lnet.ln_peer_hash == NULL);
- LIBCFS_ALLOC(hash, LNET_PEER_HASHSIZE * sizeof(struct list_head));
-
- if (hash == NULL) {
- CERROR("Can't allocate peer hash table\n");
+ struct lnet_peer_table *ptable;
+ struct list_head *hash;
+ int i;
+ int j;
+
+ the_lnet.ln_peer_tables = cfs_percpt_alloc(lnet_cpt_table(),
+ sizeof(*ptable));
+ if (the_lnet.ln_peer_tables == NULL) {
+ CERROR("Failed to allocate cpu-partition peer tables\n");
return -ENOMEM;
}
- for (i = 0; i < LNET_PEER_HASHSIZE; i++)
- CFS_INIT_LIST_HEAD(&hash[i]);
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ LIBCFS_CPT_ALLOC(hash, lnet_cpt_table(), i,
+ LNET_PEER_HASH_SIZE * sizeof(*hash));
+ if (hash == NULL) {
+ CERROR("Failed to create peer hash table\n");
+ lnet_peer_tables_destroy();
+ return -ENOMEM;
+ }
+
+ for (j = 0; j < LNET_PEER_HASH_SIZE; j++)
+ INIT_LIST_HEAD(&hash[j]);
+ ptable->pt_hash = hash; /* sign of initialization */
+ }
- the_lnet.ln_peer_hash = hash;
return 0;
}
void
-lnet_destroy_peer_table(void)
+lnet_peer_tables_destroy(void)
{
- int i;
+ struct lnet_peer_table *ptable;
+ struct list_head *hash;
+ int i;
+ int j;
+
+ if (the_lnet.ln_peer_tables == NULL)
+ return;
- if (the_lnet.ln_peer_hash == NULL)
- return;
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ hash = ptable->pt_hash;
+ if (hash == NULL) /* not intialized */
+ break;
- for (i = 0; i < LNET_PEER_HASHSIZE; i++)
- LASSERT (list_empty(&the_lnet.ln_peer_hash[i]));
-
- LIBCFS_FREE(the_lnet.ln_peer_hash,
- LNET_PEER_HASHSIZE * sizeof (struct list_head));
- the_lnet.ln_peer_hash = NULL;
+ ptable->pt_hash = NULL;
+ for (j = 0; j < LNET_PEER_HASH_SIZE; j++)
+ LASSERT(list_empty(&hash[j]));
+
+ LIBCFS_FREE(hash, LNET_PEER_HASH_SIZE * sizeof(*hash));
+ }
+
+ cfs_percpt_free(the_lnet.ln_peer_tables);
+ the_lnet.ln_peer_tables = NULL;
}
-void
-lnet_clear_peer_table(void)
+static void
+lnet_peer_table_cleanup_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable)
{
- int i;
-
- LASSERT (the_lnet.ln_shutdown); /* i.e. no new peers */
-
- for (i = 0; i < LNET_PEER_HASHSIZE; i++) {
- struct list_head *peers = &the_lnet.ln_peer_hash[i];
-
- LNET_LOCK();
- while (!list_empty(peers)) {
- lnet_peer_t *lp = list_entry(peers->next,
- lnet_peer_t, lp_hashlist);
-
- list_del(&lp->lp_hashlist);
- lnet_peer_decref_locked(lp); /* lose hash table's ref */
+ int i;
+ struct lnet_peer_ni *lp;
+ struct lnet_peer_ni *tmp;
+
+ for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
+ list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
+ lpni_hashlist) {
+ if (ni != NULL && ni->ni_net != lp->lpni_net)
+ continue;
+ list_del_init(&lp->lpni_hashlist);
+ /* Lose hash table's ref */
+ ptable->pt_zombies++;
+ lnet_peer_ni_decref_locked(lp);
}
- LNET_UNLOCK();
}
+}
- LNET_LOCK();
- for (i = 3; the_lnet.ln_npeers != 0;i++) {
- LNET_UNLOCK();
+static void
+lnet_peer_table_finalize_wait_locked(struct lnet_peer_table *ptable,
+ int cpt_locked)
+{
+ int i;
- if ((i & (i-1)) == 0)
- CDEBUG(D_WARNING,"Waiting for %d peers\n",
- the_lnet.ln_npeers);
- cfs_pause(cfs_time_seconds(1));
+ for (i = 3; ptable->pt_zombies != 0; i++) {
+ lnet_net_unlock(cpt_locked);
- LNET_LOCK();
- }
- LNET_UNLOCK();
+ if (IS_PO2(i)) {
+ CDEBUG(D_WARNING,
+ "Waiting for %d zombies on peer table\n",
+ ptable->pt_zombies);
+ }
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(1) >> 1);
+ lnet_net_lock(cpt_locked);
+ }
}
-void
-lnet_destroy_peer_locked (lnet_peer_t *lp)
+static void
+lnet_peer_table_del_rtrs_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable,
+ int cpt_locked)
{
- lnet_ni_decref_locked(lp->lp_ni);
- LNET_UNLOCK();
+ struct lnet_peer_ni *lp;
+ struct lnet_peer_ni *tmp;
+ lnet_nid_t lpni_nid;
+ int i;
- LASSERT (lp->lp_refcount == 0);
- LASSERT (lp->lp_rtr_refcount == 0);
- LASSERT (list_empty(&lp->lp_txq));
- LASSERT (lp->lp_txqnob == 0);
- LASSERT (lp->lp_rcd == NULL);
+ for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
+ list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
+ lpni_hashlist) {
+ if (ni->ni_net != lp->lpni_net)
+ continue;
- LIBCFS_FREE(lp, sizeof(*lp));
+ if (lp->lpni_rtr_refcount == 0)
+ continue;
- LNET_LOCK();
+ lpni_nid = lp->lpni_nid;
- LASSERT(the_lnet.ln_npeers > 0);
- the_lnet.ln_npeers--;
+ lnet_net_unlock(cpt_locked);
+ lnet_del_route(LNET_NIDNET(LNET_NID_ANY), lpni_nid);
+ lnet_net_lock(cpt_locked);
+ }
+ }
}
-lnet_peer_t *
-lnet_find_peer_locked (lnet_nid_t nid)
+void
+lnet_peer_tables_cleanup(lnet_ni_t *ni)
{
- unsigned int idx = LNET_NIDADDR(nid) % LNET_PEER_HASHSIZE;
- struct list_head *peers = &the_lnet.ln_peer_hash[idx];
- struct list_head *tmp;
- lnet_peer_t *lp;
-
- if (the_lnet.ln_shutdown)
- return NULL;
-
- list_for_each (tmp, peers) {
- lp = list_entry(tmp, lnet_peer_t, lp_hashlist);
-
- if (lp->lp_nid == nid) {
- lnet_peer_addref_locked(lp);
+ int i;
+ struct lnet_peer_table *ptable;
+
+ LASSERT(the_lnet.ln_shutdown || ni != NULL);
+ /* If just deleting the peers for a NI, get rid of any routes these
+ * peers are gateways for. */
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_peer_table_del_rtrs_locked(ni, ptable, i);
+ lnet_net_unlock(LNET_LOCK_EX);
+ }
+
+ /* Start the cleanup process */
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_peer_table_cleanup_locked(ni, ptable);
+ lnet_net_unlock(LNET_LOCK_EX);
+ }
+
+ /* Wait until all peers have been destroyed. */
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_peer_table_finalize_wait_locked(ptable, i);
+ lnet_net_unlock(LNET_LOCK_EX);
+ }
+}
+
+static struct lnet_peer_ni *
+lnet_get_peer_ni_locked(struct lnet_peer_table *ptable, lnet_nid_t nid)
+{
+ struct list_head *peers;
+ struct lnet_peer_ni *lp;
+
+ LASSERT(!the_lnet.ln_shutdown);
+
+ peers = &ptable->pt_hash[lnet_nid2peerhash(nid)];
+ list_for_each_entry(lp, peers, lpni_hashlist) {
+ if (lp->lpni_nid == nid) {
+ lnet_peer_ni_addref_locked(lp);
return lp;
- }
+ }
+ }
+
+ return NULL;
+}
+
+struct lnet_peer_ni *
+lnet_find_peer_ni_locked(lnet_nid_t nid, int cpt)
+{
+ struct lnet_peer_ni *lpni;
+ struct lnet_peer_table *ptable;
+
+ ptable = the_lnet.ln_peer_tables[cpt];
+ lpni = lnet_get_peer_ni_locked(ptable, nid);
+
+ return lpni;
+}
+
+int
+lnet_find_or_create_peer_locked(lnet_nid_t dst_nid, int cpt, struct lnet_peer **peer)
+{
+ struct lnet_peer_ni *lpni;
+
+ lpni = lnet_find_peer_ni_locked(dst_nid, cpt);
+ if (!lpni) {
+ int rc;
+ rc = lnet_nid2peerni_locked(&lpni, dst_nid, cpt);
+ if (rc != 0)
+ return rc;
+ }
+
+ *peer = lpni->lpni_peer_net->lpn_peer;
+ lnet_peer_ni_decref_locked(lpni);
+
+ return 0;
+}
+
+struct lnet_peer_ni *
+lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
+ struct lnet_peer_net *peer_net,
+ struct lnet_peer_ni *prev)
+{
+ struct lnet_peer_ni *lpni;
+ struct lnet_peer_net *net = peer_net;
+
+ if (!prev) {
+ if (!net)
+ net = list_entry(peer->lp_peer_nets.next,
+ struct lnet_peer_net,
+ lpn_on_peer_list);
+ lpni = list_entry(net->lpn_peer_nis.next, struct lnet_peer_ni,
+ lpni_on_peer_net_list);
+
+ return lpni;
+ }
+
+ if (prev->lpni_on_peer_net_list.next ==
+ &prev->lpni_peer_net->lpn_peer_nis) {
+ /*
+ * if you reached the end of the peer ni list and the peer
+ * net is specified then there are no more peer nis in that
+ * net.
+ */
+ if (net)
+ return NULL;
+
+ /*
+ * we reached the end of this net ni list. move to the
+ * next net
+ */
+ if (prev->lpni_peer_net->lpn_on_peer_list.next ==
+ &peer->lp_peer_nets)
+ /* no more nets and no more NIs. */
+ return NULL;
+
+ /* get the next net */
+ net = list_entry(prev->lpni_peer_net->lpn_on_peer_list.next,
+ struct lnet_peer_net,
+ lpn_on_peer_list);
+ /* get the ni on it */
+ lpni = list_entry(net->lpn_peer_nis.next, struct lnet_peer_ni,
+ lpni_on_peer_net_list);
+
+ return lpni;
+ }
+
+ /* there are more nis left */
+ lpni = list_entry(prev->lpni_on_peer_net_list.next,
+ struct lnet_peer_ni, lpni_on_peer_net_list);
+
+ return lpni;
+}
+
+bool
+lnet_peer_is_ni_pref_locked(struct lnet_peer_ni *lpni, struct lnet_ni *ni)
+{
+ int i;
+
+ for (i = 0; i < lpni->lpni_pref_nnids; i++) {
+ if (lpni->lpni_pref_nids[i] == ni->ni_nid)
+ return true;
+ }
+ return false;
+}
+
+static void
+lnet_try_destroy_peer_hierarchy_locked(struct lnet_peer_ni *lpni)
+{
+ struct lnet_peer_net *peer_net;
+ struct lnet_peer *peer;
+
+ /* TODO: could the below situation happen? accessing an already
+ * destroyed peer? */
+ if (lpni->lpni_peer_net == NULL ||
+ lpni->lpni_peer_net->lpn_peer == NULL)
+ return;
+
+ peer_net = lpni->lpni_peer_net;
+ peer = lpni->lpni_peer_net->lpn_peer;
+
+ list_del_init(&lpni->lpni_on_peer_net_list);
+ lpni->lpni_peer_net = NULL;
+
+ /* if peer_net is empty, then remove it from the peer */
+ if (list_empty(&peer_net->lpn_peer_nis)) {
+ list_del_init(&peer_net->lpn_on_peer_list);
+ peer_net->lpn_peer = NULL;
+ LIBCFS_FREE(peer_net, sizeof(*peer_net));
+
+ /* if the peer is empty then remove it from the
+ * the_lnet.ln_peers */
+ if (list_empty(&peer->lp_peer_nets)) {
+ list_del_init(&peer->lp_on_lnet_peer_list);
+ LIBCFS_FREE(peer, sizeof(*peer));
+ }
+ }
+}
+
+static int
+lnet_build_peer_hierarchy(struct lnet_peer_ni *lpni)
+{
+ struct lnet_peer *peer;
+ struct lnet_peer_net *peer_net;
+ __u32 lpni_net = LNET_NIDNET(lpni->lpni_nid);
+
+ peer = NULL;
+ peer_net = NULL;
+
+ LIBCFS_ALLOC(peer, sizeof(*peer));
+ if (peer == NULL)
+ return -ENOMEM;
+
+ LIBCFS_ALLOC(peer_net, sizeof(*peer_net));
+ if (peer_net == NULL) {
+ LIBCFS_FREE(peer, sizeof(*peer));
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&peer->lp_on_lnet_peer_list);
+ INIT_LIST_HEAD(&peer->lp_peer_nets);
+ INIT_LIST_HEAD(&peer_net->lpn_on_peer_list);
+ INIT_LIST_HEAD(&peer_net->lpn_peer_nis);
+
+ /* build the hierarchy */
+ peer_net->lpn_net_id = lpni_net;
+ peer_net->lpn_peer = peer;
+ lpni->lpni_peer_net = peer_net;
+ peer->lp_primary_nid = lpni->lpni_nid;
+ list_add_tail(&peer_net->lpn_on_peer_list, &peer->lp_peer_nets);
+ list_add_tail(&lpni->lpni_on_peer_net_list, &peer_net->lpn_peer_nis);
+ list_add_tail(&peer->lp_on_lnet_peer_list, &the_lnet.ln_peers);
+
+ return 0;
+}
+
+struct lnet_peer_net *
+lnet_peer_get_net_locked(struct lnet_peer *peer, __u32 net_id)
+{
+ struct lnet_peer_net *peer_net;
+ list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_on_peer_list) {
+ if (peer_net->lpn_net_id == net_id)
+ return peer_net;
}
-
return NULL;
}
+void
+lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lpni)
+{
+ struct lnet_peer_table *ptable;
+
+ LASSERT(atomic_read(&lpni->lpni_refcount) == 0);
+ LASSERT(lpni->lpni_rtr_refcount == 0);
+ LASSERT(list_empty(&lpni->lpni_txq));
+ LASSERT(list_empty(&lpni->lpni_hashlist));
+ LASSERT(lpni->lpni_txqnob == 0);
+ LASSERT(lpni->lpni_peer_net != NULL);
+ LASSERT(lpni->lpni_peer_net->lpn_peer != NULL);
+
+ ptable = the_lnet.ln_peer_tables[lpni->lpni_cpt];
+ LASSERT(ptable->pt_number > 0);
+ ptable->pt_number--;
+
+ lpni->lpni_net = NULL;
+
+ lnet_try_destroy_peer_hierarchy_locked(lpni);
+
+ LIBCFS_FREE(lpni, sizeof(*lpni));
+
+ LASSERT(ptable->pt_zombies > 0);
+ ptable->pt_zombies--;
+}
+
int
-lnet_nid2peer_locked(lnet_peer_t **lpp, lnet_nid_t nid)
+lnet_nid2peerni_locked(struct lnet_peer_ni **lpnip, lnet_nid_t nid, int cpt)
{
- lnet_peer_t *lp;
- lnet_peer_t *lp2;
-
- lp = lnet_find_peer_locked(nid);
- if (lp != NULL) {
- *lpp = lp;
- return 0;
- }
-
- LNET_UNLOCK();
-
- LIBCFS_ALLOC(lp, sizeof(*lp));
- if (lp == NULL) {
- *lpp = NULL;
- LNET_LOCK();
- return -ENOMEM;
- }
-
- memset(lp, 0, sizeof(*lp)); /* zero counters etc */
-
- CFS_INIT_LIST_HEAD(&lp->lp_txq);
- CFS_INIT_LIST_HEAD(&lp->lp_rtrq);
-
- lp->lp_notify = 0;
- lp->lp_notifylnd = 0;
- lp->lp_notifying = 0;
- lp->lp_alive_count = 0;
- lp->lp_timestamp = 0;
- lp->lp_alive = !lnet_peers_start_down(); /* 1 bit!! */
- lp->lp_last_alive = cfs_time_current(); /* assumes alive */
- lp->lp_last_query = 0; /* haven't asked NI yet */
- lp->lp_ping_timestamp = 0;
- lp->lp_nid = nid;
- lp->lp_refcount = 2; /* 1 for caller; 1 for hash */
- lp->lp_rtr_refcount = 0;
-
- LNET_LOCK();
-
- lp2 = lnet_find_peer_locked(nid);
- if (lp2 != NULL) {
- LNET_UNLOCK();
- LIBCFS_FREE(lp, sizeof(*lp));
- LNET_LOCK();
-
- if (the_lnet.ln_shutdown) {
- lnet_peer_decref_locked(lp2);
- *lpp = NULL;
- return -ESHUTDOWN;
- }
-
- *lpp = lp2;
- return 0;
- }
-
- lp->lp_ni = lnet_net2ni_locked(LNET_NIDNET(nid));
- if (lp->lp_ni == NULL) {
- LNET_UNLOCK();
- LIBCFS_FREE(lp, sizeof(*lp));
- LNET_LOCK();
-
- *lpp = NULL;
- return the_lnet.ln_shutdown ? -ESHUTDOWN : -EHOSTUNREACH;
- }
-
- lp->lp_txcredits =
- lp->lp_mintxcredits = lp->lp_ni->ni_peertxcredits;
- lp->lp_rtrcredits =
- lp->lp_minrtrcredits = lnet_peer_buffer_credits(lp->lp_ni);
-
- LASSERT (!the_lnet.ln_shutdown);
- /* can't add peers after shutdown starts */
-
- list_add_tail(&lp->lp_hashlist, lnet_nid2peerhash(nid));
- the_lnet.ln_npeers++;
- the_lnet.ln_peertable_version++;
- *lpp = lp;
- return 0;
+ struct lnet_peer_table *ptable;
+ struct lnet_peer_ni *lpni = NULL;
+ struct lnet_peer_ni *lpni2;
+ int cpt2;
+ int rc = 0;
+
+ *lpnip = NULL;
+ if (the_lnet.ln_shutdown) /* it's shutting down */
+ return -ESHUTDOWN;
+
+ /*
+ * calculate cpt2 with the standard hash function
+ * This cpt2 becomes the slot where we'll find or create the peer.
+ */
+ cpt2 = lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
+
+ /*
+ * Any changes to the peer tables happen under exclusive write
+ * lock. Any reads to the peer tables can be done via a standard
+ * CPT read lock.
+ */
+ if (cpt != LNET_LOCK_EX) {
+ lnet_net_unlock(cpt);
+ lnet_net_lock(LNET_LOCK_EX);
+ }
+
+ ptable = the_lnet.ln_peer_tables[cpt2];
+ lpni = lnet_get_peer_ni_locked(ptable, nid);
+ if (lpni != NULL) {
+ *lpnip = lpni;
+ if (cpt != LNET_LOCK_EX) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_net_lock(cpt);
+ }
+ return 0;
+ }
+
+ /*
+ * take extra refcount in case another thread has shutdown LNet
+ * and destroyed locks and peer-table before I finish the allocation
+ */
+ ptable->pt_number++;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ LIBCFS_CPT_ALLOC(lpni, lnet_cpt_table(), cpt2, sizeof(*lpni));
+
+ if (lpni == NULL) {
+ rc = -ENOMEM;
+ lnet_net_lock(cpt);
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&lpni->lpni_txq);
+ INIT_LIST_HEAD(&lpni->lpni_rtrq);
+ INIT_LIST_HEAD(&lpni->lpni_routes);
+
+ lpni->lpni_alive = !lnet_peers_start_down(); /* 1 bit!! */
+ lpni->lpni_last_alive = cfs_time_current(); /* assumes alive */
+ lpni->lpni_ping_feats = LNET_PING_FEAT_INVAL;
+ lpni->lpni_nid = nid;
+ lpni->lpni_cpt = cpt2;
+ atomic_set(&lpni->lpni_refcount, 2); /* 1 for caller; 1 for hash */
+
+ rc = lnet_build_peer_hierarchy(lpni);
+ if (rc != 0)
+ goto out;
+
+ lnet_net_lock(LNET_LOCK_EX);
+
+ if (the_lnet.ln_shutdown) {
+ rc = -ESHUTDOWN;
+ goto out;
+ }
+
+ lpni2 = lnet_get_peer_ni_locked(ptable, nid);
+ if (lpni2 != NULL) {
+ *lpnip = lpni2;
+ goto out;
+ }
+
+ lpni->lpni_net = lnet_get_net_locked(LNET_NIDNET(lpni->lpni_nid));
+ if (lpni->lpni_net) {
+ lpni->lpni_txcredits =
+ lpni->lpni_mintxcredits =
+ lpni->lpni_net->net_tunables.lct_peer_tx_credits;
+ lpni->lpni_rtrcredits =
+ lpni->lpni_minrtrcredits =
+ lnet_peer_buffer_credits(lpni->lpni_net);
+ } else {
+ CDEBUG(D_NET, "peer_ni %s is not directly connected\n",
+ libcfs_nid2str(nid));
+ }
+
+ lnet_set_peer_ni_health_locked(lpni, true);
+
+ list_add_tail(&lpni->lpni_hashlist,
+ &ptable->pt_hash[lnet_nid2peerhash(nid)]);
+ ptable->pt_version++;
+ *lpnip = lpni;
+
+ if (cpt != LNET_LOCK_EX) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_net_lock(cpt);
+ }
+
+ return 0;
+out:
+ if (lpni != NULL) {
+ lnet_try_destroy_peer_hierarchy_locked(lpni);
+ LIBCFS_FREE(lpni, sizeof(*lpni));
+ }
+ ptable->pt_number--;
+ if (cpt != LNET_LOCK_EX) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_net_lock(cpt);
+ }
+ return rc;
}
void
lnet_debug_peer(lnet_nid_t nid)
{
- char *aliveness = "NA";
- int rc;
- lnet_peer_t *lp;
+ char *aliveness = "NA";
+ struct lnet_peer_ni *lp;
+ int rc;
+ int cpt;
+
+ cpt = lnet_cpt_of_nid(nid, NULL);
+ lnet_net_lock(cpt);
+
+ rc = lnet_nid2peerni_locked(&lp, nid, cpt);
+ if (rc != 0) {
+ lnet_net_unlock(cpt);
+ CDEBUG(D_WARNING, "No peer %s\n", libcfs_nid2str(nid));
+ return;
+ }
+
+ if (lnet_isrouter(lp) || lnet_peer_aliveness_enabled(lp))
+ aliveness = lp->lpni_alive ? "up" : "down";
- LNET_LOCK();
+ CDEBUG(D_WARNING, "%-24s %4d %5s %5d %5d %5d %5d %5d %ld\n",
+ libcfs_nid2str(lp->lpni_nid), atomic_read(&lp->lpni_refcount),
+ aliveness, lp->lpni_net->net_tunables.lct_peer_tx_credits,
+ lp->lpni_rtrcredits, lp->lpni_minrtrcredits,
+ lp->lpni_txcredits, lp->lpni_mintxcredits, lp->lpni_txqnob);
- rc = lnet_nid2peer_locked(&lp, nid);
- if (rc != 0) {
- LNET_UNLOCK();
- CDEBUG(D_WARNING, "No peer %s\n", libcfs_nid2str(nid));
- return;
- }
+ lnet_peer_ni_decref_locked(lp);
- if (lnet_isrouter(lp) || lp->lp_ni->ni_peertimeout > 0)
- aliveness = lp->lp_alive ? "up" : "down";
+ lnet_net_unlock(cpt);
+}
- CDEBUG(D_WARNING, "%-24s %4d %5s %5d %5d %5d %5d %5d %ld\n",
- libcfs_nid2str(lp->lp_nid), lp->lp_refcount,
- aliveness, lp->lp_ni->ni_peertxcredits,
- lp->lp_rtrcredits, lp->lp_minrtrcredits,
- lp->lp_txcredits, lp->lp_mintxcredits, lp->lp_txqnob);
+int lnet_get_peer_info(__u32 peer_index, __u64 *nid,
+ char aliveness[LNET_MAX_STR_LEN],
+ __u32 *cpt_iter, __u32 *refcount,
+ __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
+ __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credits,
+ __u32 *peer_tx_qnob)
+{
+ struct lnet_peer_table *peer_table;
+ struct lnet_peer_ni *lp;
+ int j;
+ int lncpt;
+ bool found = false;
+
+ /* get the number of CPTs */
+ lncpt = cfs_percpt_number(the_lnet.ln_peer_tables);
+
+ /* if the cpt number to be examined is >= the number of cpts in
+ * the system then indicate that there are no more cpts to examin
+ */
+ if (*cpt_iter >= lncpt)
+ return -ENOENT;
+
+ /* get the current table */
+ peer_table = the_lnet.ln_peer_tables[*cpt_iter];
+ /* if the ptable is NULL then there are no more cpts to examine */
+ if (peer_table == NULL)
+ return -ENOENT;
+
+ lnet_net_lock(*cpt_iter);
+
+ for (j = 0; j < LNET_PEER_HASH_SIZE && !found; j++) {
+ struct list_head *peers = &peer_table->pt_hash[j];
+
+ list_for_each_entry(lp, peers, lpni_hashlist) {
+ if (peer_index-- > 0)
+ continue;
+
+ snprintf(aliveness, LNET_MAX_STR_LEN, "NA");
+ if (lnet_isrouter(lp) ||
+ lnet_peer_aliveness_enabled(lp))
+ snprintf(aliveness, LNET_MAX_STR_LEN,
+ lp->lpni_alive ? "up" : "down");
+
+ *nid = lp->lpni_nid;
+ *refcount = atomic_read(&lp->lpni_refcount);
+ *ni_peer_tx_credits =
+ lp->lpni_net->net_tunables.lct_peer_tx_credits;
+ *peer_tx_credits = lp->lpni_txcredits;
+ *peer_rtr_credits = lp->lpni_rtrcredits;
+ *peer_min_rtr_credits = lp->lpni_mintxcredits;
+ *peer_tx_qnob = lp->lpni_txqnob;
+
+ found = true;
+ }
+
+ }
+ lnet_net_unlock(*cpt_iter);
- lnet_peer_decref_locked(lp);
+ *cpt_iter = lncpt;
- LNET_UNLOCK();
+ return found ? 0 : -ENOENT;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff