*
* 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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * 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_peer_tables_create(void)
the_lnet.ln_peer_tables = NULL;
}
+static void
+lnet_peer_table_cleanup_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable)
+{
+ int i;
+ lnet_peer_t *lp;
+ lnet_peer_t *tmp;
+
+ for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
+ list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
+ lp_hashlist) {
+ if (ni != NULL && ni != lp->lp_ni)
+ continue;
+ list_del_init(&lp->lp_hashlist);
+ /* Lose hash table's ref */
+ ptable->pt_zombies++;
+ lnet_peer_decref_locked(lp);
+ }
+ }
+}
+
+static void
+lnet_peer_table_deathrow_wait_locked(struct lnet_peer_table *ptable,
+ int cpt_locked)
+{
+ int i;
+
+ for (i = 3; ptable->pt_zombies != 0; i++) {
+ lnet_net_unlock(cpt_locked);
+
+ 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);
+ }
+}
+
+static void
+lnet_peer_table_del_rtrs_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable,
+ int cpt_locked)
+{
+ lnet_peer_t *lp;
+ lnet_peer_t *tmp;
+ lnet_nid_t lp_nid;
+ int i;
+
+ for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
+ list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
+ lp_hashlist) {
+ if (ni != lp->lp_ni)
+ continue;
+
+ if (lp->lp_rtr_refcount == 0)
+ continue;
+
+ lp_nid = lp->lp_nid;
+
+ lnet_net_unlock(cpt_locked);
+ lnet_del_route(LNET_NIDNET(LNET_NID_ANY), lp_nid);
+ lnet_net_lock(cpt_locked);
+ }
+ }
+}
+
void
-lnet_peer_tables_cleanup(void)
+lnet_peer_tables_cleanup(lnet_ni_t *ni)
{
- struct lnet_peer_table *ptable;
int i;
- int j;
+ struct lnet_peer_table *ptable;
+ lnet_peer_t *lp;
+ struct list_head deathrow;
- LASSERT(the_lnet.ln_shutdown); /* i.e. no new peers */
+ INIT_LIST_HEAD(&deathrow);
+ 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(i);
-
- for (j = 0; j < LNET_PEER_HASH_SIZE; j++) {
- struct list_head *peers = &ptable->pt_hash[j];
-
- while (!list_empty(peers)) {
- lnet_peer_t *lp = list_entry(peers->next,
- lnet_peer_t,
- lp_hashlist);
- list_del_init(&lp->lp_hashlist);
- /* lose hash table's ref */
- lnet_peer_decref_locked(lp);
- }
- }
-
+ lnet_peer_table_del_rtrs_locked(ni, ptable, i);
lnet_net_unlock(i);
}
+ /* Start the process of moving the applicable peers to
+ * deathrow. */
cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
- struct list_head deathrow = LIST_HEAD_INIT(deathrow);
- lnet_peer_t *lp;
-
lnet_net_lock(i);
+ lnet_peer_table_cleanup_locked(ni, ptable);
+ lnet_net_unlock(i);
+ }
- for (j = 3; ptable->pt_number != 0; j++) {
- lnet_net_unlock(i);
-
- if ((j & (j - 1)) == 0) {
- CDEBUG(D_WARNING,
- "Waiting for %d peers on peer table\n",
- ptable->pt_number);
- }
- cfs_pause(cfs_time_seconds(1) / 2);
- lnet_net_lock(i);
- }
+ /* Cleanup all entries on deathrow. */
+ cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
+ lnet_net_lock(i);
+ lnet_peer_table_deathrow_wait_locked(ptable, i);
list_splice_init(&ptable->pt_deathrow, &deathrow);
-
lnet_net_unlock(i);
+ }
- while (!list_empty(&deathrow)) {
- lp = list_entry(deathrow.next,
- lnet_peer_t, lp_hashlist);
- list_del(&lp->lp_hashlist);
- LIBCFS_FREE(lp, sizeof(*lp));
- }
+ while (!list_empty(&deathrow)) {
+ lp = list_entry(deathrow.next, lnet_peer_t, lp_hashlist);
+ list_del(&lp->lp_hashlist);
+ LIBCFS_FREE(lp, sizeof(*lp));
}
}
lp->lp_ni = NULL;
list_add(&lp->lp_hashlist, &ptable->pt_deathrow);
+ LASSERT(ptable->pt_zombies > 0);
+ ptable->pt_zombies--;
}
lnet_peer_t *
INIT_LIST_HEAD(&lp->lp_rtrq);
INIT_LIST_HEAD(&lp->lp_routes);
- 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_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_ping_feats = LNET_PING_FEAT_INVAL;
lp->lp_nid = nid;
lp->lp_cpt = cpt2;
rc = lnet_nid2peer_locked(&lp, nid, cpt);
if (rc != 0) {
lnet_net_unlock(cpt);
- CDEBUG(D_WARNING, "No peer %s\n", libcfs_nid2str(nid));
- return;
- }
+ CDEBUG(D_WARNING, "No peer %s\n", libcfs_nid2str(nid));
+ return;
+ }
- if (lnet_isrouter(lp) || lnet_peer_aliveness_enabled(lp))
- aliveness = lp->lp_alive ? "up" : "down";
+ if (lnet_isrouter(lp) || lnet_peer_aliveness_enabled(lp))
+ aliveness = lp->lp_alive ? "up" : "down";
- 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);
+ 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);
- lnet_peer_decref_locked(lp);
+ lnet_peer_decref_locked(lp);
lnet_net_unlock(cpt);
}
+
+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;
+ lnet_peer_t *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, lp_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->lp_alive ? "up" : "down");
+
+ *nid = lp->lp_nid;
+ *refcount = lp->lp_refcount;
+ *ni_peer_tx_credits = lp->lp_ni->ni_peertxcredits;
+ *peer_tx_credits = lp->lp_txcredits;
+ *peer_rtr_credits = lp->lp_rtrcredits;
+ *peer_min_rtr_credits = lp->lp_mintxcredits;
+ *peer_tx_qnob = lp->lp_txqnob;
+
+ found = true;
+ }
+
+ }
+ lnet_net_unlock(*cpt_iter);
+
+ *cpt_iter = lncpt;
+
+ return found ? 0 : -ENOENT;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff