+ lnet_ping_info_t *ping_info;
+ unsigned int infosz;
+
+ infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
+ LIBCFS_ALLOC(ping_info, infosz);
+ if (ping_info == NULL) {
+ CERROR("Can't allocate ping info[%d]\n", num_ni);
+ return NULL;
+ }
+
+ ping_info->pi_nnis = num_ni;
+ ping_info->pi_pid = the_lnet.ln_pid;
+ ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
+ ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
+
+ return ping_info;
+}
+
+static inline int
+lnet_get_ni_count(void)
+{
+ struct lnet_ni *ni;
+ int count = 0;
+
+ lnet_net_lock(0);
+
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
+ count++;
+
+ lnet_net_unlock(0);
+
+ return count;
+}
+
+static inline void
+lnet_ping_info_free(lnet_ping_info_t *pinfo)
+{
+ LIBCFS_FREE(pinfo,
+ offsetof(lnet_ping_info_t,
+ pi_ni[pinfo->pi_nnis]));
+}
+
+static void
+lnet_ping_info_destroy(void)
+{
+ struct lnet_ni *ni;
+
+ lnet_net_lock(LNET_LOCK_EX);
+
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ lnet_ni_lock(ni);
+ ni->ni_status = NULL;
+ lnet_ni_unlock(ni);
+ }
+
+ lnet_ping_info_free(the_lnet.ln_ping_info);
+ the_lnet.ln_ping_info = NULL;
+
+ lnet_net_unlock(LNET_LOCK_EX);
+}
+
+static void
+lnet_ping_event_handler(lnet_event_t *event)
+{
+ lnet_ping_info_t *pinfo = event->md.user_ptr;
+
+ if (event->unlinked)
+ pinfo->pi_features = LNET_PING_FEAT_INVAL;
+}
+
+static int
+lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
+ int ni_count, bool set_eq)
+{
+ lnet_handle_me_t me_handle;
+ lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
+ lnet_md_t md = {0};
+ int rc, rc2;
+
+ if (set_eq) {
+ rc = LNetEQAlloc(0, lnet_ping_event_handler,
+ &the_lnet.ln_ping_target_eq);
+ if (rc != 0) {
+ CERROR("Can't allocate ping EQ: %d\n", rc);
+ return rc;
+ }
+ }
+
+ *ppinfo = lnet_ping_info_create(ni_count);
+ if (*ppinfo == NULL) {
+ rc = -ENOMEM;
+ goto failed_0;
+ }
+
+ rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
+ LNET_PROTO_PING_MATCHBITS, 0,
+ LNET_UNLINK, LNET_INS_AFTER,
+ &me_handle);
+ if (rc != 0) {
+ CERROR("Can't create ping ME: %d\n", rc);
+ goto failed_1;
+ }
+
+ /* initialize md content */
+ md.start = *ppinfo;
+ md.length = offsetof(lnet_ping_info_t,
+ pi_ni[(*ppinfo)->pi_nnis]);
+ md.threshold = LNET_MD_THRESH_INF;
+ md.max_size = 0;
+ md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
+ LNET_MD_MANAGE_REMOTE;
+ md.user_ptr = NULL;
+ md.eq_handle = the_lnet.ln_ping_target_eq;
+ md.user_ptr = *ppinfo;
+
+ rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
+ if (rc != 0) {
+ CERROR("Can't attach ping MD: %d\n", rc);
+ goto failed_2;
+ }
+
+ return 0;
+
+failed_2:
+ rc2 = LNetMEUnlink(me_handle);
+ LASSERT(rc2 == 0);
+failed_1:
+ lnet_ping_info_free(*ppinfo);
+ *ppinfo = NULL;
+failed_0:
+ if (set_eq)
+ LNetEQFree(the_lnet.ln_ping_target_eq);
+ return rc;
+}
+
+static void
+lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
+{
+ sigset_t blocked = cfs_block_allsigs();
+
+ LNetMDUnlink(*md_handle);
+ LNetInvalidateHandle(md_handle);
+
+ /* NB md could be busy; this just starts the unlink */
+ while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
+ CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
+ cfs_pause(cfs_time_seconds(1));
+ }
+
+ cfs_restore_sigs(blocked);
+}
+
+static void
+lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
+{
+ int i;
+ lnet_ni_t *ni;
+ lnet_ni_status_t *ns;
+
+ i = 0;
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ LASSERT(i < ping_info->pi_nnis);
+
+ ns = &ping_info->pi_ni[i];
+
+ ns->ns_nid = ni->ni_nid;
+
+ lnet_ni_lock(ni);
+ ns->ns_status = (ni->ni_status != NULL) ?
+ ni->ni_status->ns_status : LNET_NI_STATUS_UP;
+ ni->ni_status = ns;
+ lnet_ni_unlock(ni);
+
+ i++;
+ }
+}
+
+static void
+lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
+{
+ lnet_ping_info_t *old_pinfo = NULL;
+ lnet_handle_md_t old_md;
+
+ /* switch the NIs to point to the new ping info created */
+ lnet_net_lock(LNET_LOCK_EX);
+
+ if (!the_lnet.ln_routing)
+ pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
+ lnet_ping_info_install_locked(pinfo);
+
+ if (the_lnet.ln_ping_info != NULL) {
+ old_pinfo = the_lnet.ln_ping_info;
+ old_md = the_lnet.ln_ping_target_md;
+ }
+ the_lnet.ln_ping_target_md = md_handle;
+ the_lnet.ln_ping_info = pinfo;
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ if (old_pinfo != NULL) {
+ /* unlink the old ping info */
+ lnet_ping_md_unlink(old_pinfo, &old_md);
+ lnet_ping_info_free(old_pinfo);
+ }
+}
+
+static void
+lnet_ping_target_fini(void)
+{
+ int rc;
+
+ lnet_ping_md_unlink(the_lnet.ln_ping_info,
+ &the_lnet.ln_ping_target_md);
+
+ rc = LNetEQFree(the_lnet.ln_ping_target_eq);
+ LASSERT(rc == 0);
+
+ lnet_ping_info_destroy();
+}
+
+static int
+lnet_ni_tq_credits(lnet_ni_t *ni)
+{
+ int credits;
+
+ LASSERT(ni->ni_ncpts >= 1);
+
+ if (ni->ni_ncpts == 1)
+ return ni->ni_maxtxcredits;
+
+ credits = ni->ni_maxtxcredits / ni->ni_ncpts;
+ credits = max(credits, 8 * ni->ni_peertxcredits);
+ credits = min(credits, ni->ni_maxtxcredits);
+
+ return credits;
+}
+
+static void
+lnet_clear_zombies_nis_locked(void)
+{
+ int i;
+ int islo;
+ lnet_ni_t *ni;
+
+ /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
+ * and shut them down in guaranteed thread context */
+ i = 2;
+ while (!list_empty(&the_lnet.ln_nis_zombie)) {
+ int *ref;
+ int j;
+
+ ni = list_entry(the_lnet.ln_nis_zombie.next,
+ lnet_ni_t, ni_list);
+ list_del_init(&ni->ni_list);
+ cfs_percpt_for_each(ref, j, ni->ni_refs) {
+ if (*ref == 0)
+ continue;
+ /* still busy, add it back to zombie list */
+ list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ break;
+ }
+
+ if (!list_empty(&ni->ni_list)) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ ++i;
+ if ((i & (-i)) == i) {
+ CDEBUG(D_WARNING,
+ "Waiting for zombie LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
+ }
+ cfs_pause(cfs_time_seconds(1));
+ lnet_net_lock(LNET_LOCK_EX);
+ continue;
+ }
+
+ ni->ni_lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ islo = ni->ni_lnd->lnd_type == LOLND;
+
+ LASSERT(!in_interrupt());
+ (ni->ni_lnd->lnd_shutdown)(ni);
+
+ /* can't deref lnd anymore now; it might have unregistered
+ * itself... */
+
+ if (!islo)
+ CDEBUG(D_LNI, "Removed LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
+
+ lnet_ni_free(ni);
+ i = 2;
+ lnet_net_lock(LNET_LOCK_EX);
+ }
+}
+
+static void
+lnet_shutdown_lndnis(void)
+{
+ int i;
+ lnet_ni_t *ni;
+
+ /* NB called holding the global mutex */
+
+ /* All quiet on the API front */
+ LASSERT(!the_lnet.ln_shutdown);
+ LASSERT(the_lnet.ln_refcount == 0);
+ LASSERT(list_empty(&the_lnet.ln_nis_zombie));
+
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_shutdown = 1; /* flag shutdown */
+
+ /* Unlink NIs from the global table */
+ while (!list_empty(&the_lnet.ln_nis)) {
+ ni = list_entry(the_lnet.ln_nis.next,
+ lnet_ni_t, ni_list);
+ /* move it to zombie list and nobody can find it anymore */
+ list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
+
+ if (!list_empty(&ni->ni_cptlist)) {
+ list_del_init(&ni->ni_cptlist);
+ lnet_ni_decref_locked(ni, 0);
+ }
+ }
+
+ /* Drop the cached eqwait NI. */
+ if (the_lnet.ln_eq_waitni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
+ the_lnet.ln_eq_waitni = NULL;
+ }
+
+ /* Drop the cached loopback NI. */
+ if (the_lnet.ln_loni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_loni, 0);
+ the_lnet.ln_loni = NULL;
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Clear lazy portals and drop delayed messages which hold refs
+ * on their lnet_msg_t::msg_rxpeer */
+ for (i = 0; i < the_lnet.ln_nportals; i++)
+ LNetClearLazyPortal(i);
+
+ /* Clear the peer table and wait for all peers to go (they hold refs on
+ * their NIs) */
+ lnet_peer_tables_cleanup(NULL);
+
+ lnet_net_lock(LNET_LOCK_EX);
+
+ lnet_clear_zombies_nis_locked();
+ the_lnet.ln_shutdown = 0;
+ lnet_net_unlock(LNET_LOCK_EX);
+}
+
+int
+lnet_shutdown_lndni(__u32 net)
+{
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ lnet_ni_t *found_ni = NULL;
+ int ni_count;
+ int rc;
+
+ if (LNET_NETTYP(net) == LOLND)
+ return -EINVAL;
+
+ ni_count = lnet_get_ni_count();
+
+ /* create and link a new ping info, before removing the old one */
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count - 1, false);
+ if (rc != 0)
+ return rc;
+
+ /* proceed with shutting down the NI */
+ lnet_net_lock(LNET_LOCK_EX);
+
+ found_ni = lnet_net2ni_locked(net, 0);
+ if (found_ni == NULL) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+ return -EINVAL;
+ }
+
+ /* decrement the reference counter on found_ni which was
+ * incremented when we called lnet_net2ni_locked() */
+ lnet_ni_decref_locked(found_ni, 0);
+
+ /* Move ni to zombie list so nobody can find it anymore */
+ list_move(&found_ni->ni_list, &the_lnet.ln_nis_zombie);
+
+ /* Drop the lock reference for the ln_nis ref. */
+ lnet_ni_decref_locked(found_ni, 0);
+
+ if (!list_empty(&found_ni->ni_cptlist)) {
+ list_del_init(&found_ni->ni_cptlist);
+ lnet_ni_decref_locked(found_ni, 0);
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Do peer table cleanup for this ni */
+ lnet_peer_tables_cleanup(found_ni);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_clear_zombies_nis_locked();
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ lnet_ping_target_update(pinfo, md_handle);
+
+ return 0;
+}
+
+static int
+lnet_startup_lndnis(struct list_head *nilist, __s32 peer_timeout,
+ __s32 peer_cr, __s32 peer_buf_cr, __s32 credits,
+ int *ni_count)
+{
+ int rc = 0;
+ struct lnet_ni *ni;
+ int lnd_type;
+ lnd_t *lnd;
+ struct lnet_tx_queue *tq;
+ int i;
+
+ while (!list_empty(nilist)) {
+ ni = list_entry(nilist->next, lnet_ni_t, ni_list);
+ lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
+
+ if (!libcfs_isknown_lnd(lnd_type))
+ goto failed;
+
+ if (lnd_type == CIBLND ||
+ lnd_type == OPENIBLND ||
+ lnd_type == IIBLND ||
+ lnd_type == VIBLND) {
+ CERROR("LND %s obsoleted\n",
+ libcfs_lnd2str(lnd_type));
+ goto failed;
+ }
+
+ /* Make sure this new NI is unique. */
+ lnet_net_lock(LNET_LOCK_EX);
+ if (!lnet_net_unique(LNET_NIDNET(ni->ni_nid),
+ &the_lnet.ln_nis)) {
+ if (lnd_type == LOLND) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ list_del(&ni->ni_list);
+ lnet_ni_free(ni);
+ continue;
+ }
+
+ CERROR("Net %s is not unique\n",
+ libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
+ lnet_net_unlock(LNET_LOCK_EX);
+ goto failed;
+ }
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+ lnd = lnet_find_lnd_by_type(lnd_type);
+
+#ifdef __KERNEL__
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ rc = request_module("%s",
+ libcfs_lnd2modname(lnd_type));
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+
+ lnd = lnet_find_lnd_by_type(lnd_type);
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ CERROR("Can't load LND %s, module %s, rc=%d\n",
+ libcfs_lnd2str(lnd_type),
+ libcfs_lnd2modname(lnd_type), rc);
+#ifndef HAVE_MODULE_LOADING_SUPPORT
+ LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
+ "compiled with kernel module "
+ "loading support.");
+#endif
+ goto failed;
+ }
+ }
+#else
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ CERROR("LND %s not supported\n",
+ libcfs_lnd2str(lnd_type));
+ goto failed;
+ }
+#endif
+
+ lnet_net_lock(LNET_LOCK_EX);
+ lnd->lnd_refcount++;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ ni->ni_lnd = lnd;
+
+ rc = (lnd->lnd_startup)(ni);
+
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+
+ if (rc != 0) {
+ LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
+ "\n",
+ rc, libcfs_lnd2str(lnd->lnd_type));
+ lnet_net_lock(LNET_LOCK_EX);
+ lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
+ goto failed;
+ }
+
+ /* If given some LND tunable parameters, parse those now to
+ * override the values in the NI structure. */
+ if (peer_buf_cr >= 0)
+ ni->ni_peerrtrcredits = peer_buf_cr;
+ if (peer_timeout >= 0)
+ ni->ni_peertimeout = peer_timeout;
+ /*
+ * TODO
+ * Note: For now, don't allow the user to change
+ * peertxcredits as this number is used in the
+ * IB LND to control queue depth.
+ * if (peer_cr != -1)
+ * ni->ni_peertxcredits = peer_cr;
+ */
+ if (credits >= 0)
+ ni->ni_maxtxcredits = credits;
+
+ LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
+
+ list_del(&ni->ni_list);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ /* refcount for ln_nis */
+ lnet_ni_addref_locked(ni, 0);
+ list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
+ if (ni->ni_cpts != NULL) {
+ list_add_tail(&ni->ni_cptlist,
+ &the_lnet.ln_nis_cpt);
+ lnet_ni_addref_locked(ni, 0);
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* increment the ni_count here to account for the LOLND as
+ * well. If we increment past this point then the number
+ * of count will be missing the LOLND, and then ping and
+ * will not report the LOLND
+ */
+ if (ni_count != NULL)
+ (*ni_count)++;
+
+ if (lnd->lnd_type == LOLND) {
+ lnet_ni_addref(ni);
+ LASSERT(the_lnet.ln_loni == NULL);
+ the_lnet.ln_loni = ni;
+ continue;
+ }
+
+#ifndef __KERNEL__
+ if (lnd->lnd_wait != NULL) {
+ if (the_lnet.ln_eq_waitni == NULL) {
+ lnet_ni_addref(ni);
+ the_lnet.ln_eq_waitni = ni;
+ }
+ } else {
+# ifndef HAVE_LIBPTHREAD
+ LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
+ "single-threaded runtime\n",
+ libcfs_lnd2str(lnd_type));
+ goto failed;
+# endif
+ }
+#endif
+ if (ni->ni_peertxcredits == 0 ||
+ ni->ni_maxtxcredits == 0) {
+ LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
+ libcfs_lnd2str(lnd->lnd_type),
+ ni->ni_peertxcredits == 0 ?
+ "" : "per-peer ");
+ goto failed;
+ }
+
+ cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
+ tq->tq_credits_min =
+ tq->tq_credits_max =
+ tq->tq_credits = lnet_ni_tq_credits(ni);
+ }
+
+ CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
+ libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
+ lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
+ ni->ni_peerrtrcredits, ni->ni_peertimeout);
+ }
+
+ return 0;
+failed:
+ while (!list_empty(nilist)) {
+ ni = list_entry(nilist->next, lnet_ni_t, ni_list);
+ list_del(&ni->ni_list);
+ lnet_ni_free(ni);
+ }
+ return -EINVAL;
+}
+
+/**
+ * Initialize LNet library.
+ *
+ * Only userspace program needs to call this function - it's automatically
+ * called in the kernel at module loading time. Caller has to call LNetFini()
+ * after a call to LNetInit(), if and only if the latter returned 0. It must
+ * be called exactly once.
+ *
+ * \return 0 on success, and -ve on failures.
+ */
+int
+LNetInit(void)
+{
+ int rc;
+
+ lnet_assert_wire_constants();
+ LASSERT(!the_lnet.ln_init);
+
+ memset(&the_lnet, 0, sizeof(the_lnet));
+
+ /* refer to global cfs_cpt_table for now */
+ the_lnet.ln_cpt_table = cfs_cpt_table;
+ the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
+
+ LASSERT(the_lnet.ln_cpt_number > 0);
+ if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
+ /* we are under risk of consuming all lh_cookie */
+ CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
+ "please change setting of CPT-table and retry\n",
+ the_lnet.ln_cpt_number, LNET_CPT_MAX);
+ return -1;
+ }
+
+ while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
+ the_lnet.ln_cpt_bits++;
+
+ rc = lnet_create_locks();
+ if (rc != 0) {
+ CERROR("Can't create LNet global locks: %d\n", rc);
+ return -1;
+ }
+
+ the_lnet.ln_refcount = 0;
+ the_lnet.ln_init = 1;
+ LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
+ INIT_LIST_HEAD(&the_lnet.ln_lnds);
+ INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
+ INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
+
+#ifdef __KERNEL__
+ /* The hash table size is the number of bits it takes to express the set
+ * ln_num_routes, minus 1 (better to under estimate than over so we
+ * don't waste memory). */
+ if (rnet_htable_size <= 0)
+ rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
+ else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
+ rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
+ the_lnet.ln_remote_nets_hbits = max_t(int, 1,
+ order_base_2(rnet_htable_size) - 1);
+
+ /* All LNDs apart from the LOLND are in separate modules. They
+ * register themselves when their module loads, and unregister
+ * themselves when their module is unloaded. */
+#else
+ the_lnet.ln_remote_nets_hbits = 8;
+
+ /* Register LNDs
+ * NB the order here determines default 'networks=' order */
+# ifdef HAVE_LIBPTHREAD
+ LNET_REGISTER_ULND(the_tcplnd);
+# endif
+#endif
+ lnet_register_lnd(&the_lolnd);
+ return 0;
+}
+EXPORT_SYMBOL(LNetInit);
+
+/**
+ * Finalize LNet library.
+ *
+ * Only userspace program needs to call this function. It can be called
+ * at most once.
+ *
+ * \pre LNetInit() called with success.
+ * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
+ */
+void
+LNetFini(void)
+{
+ LASSERT(the_lnet.ln_init);
+ LASSERT(the_lnet.ln_refcount == 0);
+
+ while (!list_empty(&the_lnet.ln_lnds))
+ lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
+ lnd_t, lnd_list));
+ lnet_destroy_locks();
+
+ the_lnet.ln_init = 0;
+}
+EXPORT_SYMBOL(LNetFini);
+
+/**
+ * Set LNet PID and start LNet interfaces, routing, and forwarding.
+ *
+ * Userspace program should call this after a successful call to LNetInit().
+ * Users must call this function at least once before any other functions.
+ * For each successful call there must be a corresponding call to
+ * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
+ * ignored.
+ *
+ * The PID used by LNet may be different from the one requested.
+ * See LNetGetId().
+ *
+ * \param requested_pid PID requested by the caller.
+ *
+ * \return >= 0 on success, and < 0 error code on failures.
+ */
+int
+LNetNIInit(lnet_pid_t requested_pid)
+{
+ int im_a_router = 0;
+ int rc;
+ int ni_count = 0;
+ int lnd_type;
+ struct lnet_ni *ni;
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ struct list_head net_head;
+
+ INIT_LIST_HEAD(&net_head);
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+
+ LASSERT(the_lnet.ln_init);
+ CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
+
+ if (the_lnet.ln_refcount > 0) {
+ rc = the_lnet.ln_refcount++;
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+ }
+
+ rc = lnet_prepare(requested_pid);
+ if (rc != 0)
+ goto failed0;
+
+ rc = lnet_parse_networks(&net_head,
+ !the_lnet.ln_nis_from_mod_params ?
+ lnet_get_networks() : "");
+ if (rc < 0)
+ goto failed1;
+
+ rc = lnet_startup_lndnis(&net_head, -1, -1, -1, -1, &ni_count);
+ if (rc != 0)
+ goto failed1;
+
+ if (the_lnet.ln_eq_waitni != NULL && ni_count > 1) {
+ lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
+ LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
+ "\n",
+ libcfs_lnd2str(lnd_type));
+ goto failed2;
+ }
+
+ rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
+ if (rc != 0)
+ goto failed2;
+
+ rc = lnet_check_routes();
+ if (rc != 0)
+ goto failed2;
+
+ rc = lnet_rtrpools_alloc(im_a_router);
+ if (rc != 0)
+ goto failed2;
+
+ rc = lnet_acceptor_start();
+ if (rc != 0)
+ goto failed2;
+ the_lnet.ln_refcount = 1;
+ /* Now I may use my own API functions... */
+
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
+ if (rc != 0)
+ goto failed3;
+
+ lnet_ping_target_update(pinfo, md_handle);
+
+ rc = lnet_router_checker_start();
+ if (rc != 0)
+ goto failed4;
+
+ lnet_proc_init();
+
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return 0;
+
+failed4:
+ the_lnet.ln_refcount = 0;
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+failed3:
+ lnet_acceptor_stop();
+ rc = LNetEQFree(the_lnet.ln_ping_target_eq);
+ LASSERT(rc == 0);
+failed2:
+ lnet_destroy_routes();
+ lnet_shutdown_lndnis();
+failed1:
+ lnet_unprepare();
+failed0:
+ LASSERT(rc < 0);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ while (!list_empty(&net_head)) {
+ ni = list_entry(net_head.next, struct lnet_ni, ni_list);
+ list_del_init(&ni->ni_list);
+ lnet_ni_free(ni);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(LNetNIInit);
+
+/**
+ * Stop LNet interfaces, routing, and forwarding.
+ *
+ * Users must call this function once for each successful call to LNetNIInit().
+ * Once the LNetNIFini() operation has been started, the results of pending
+ * API operations are undefined.
+ *
+ * \return always 0 for current implementation.
+ */
+int
+LNetNIFini()
+{
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+
+ LASSERT (the_lnet.ln_init);
+ LASSERT (the_lnet.ln_refcount > 0);
+
+ if (the_lnet.ln_refcount != 1) {
+ the_lnet.ln_refcount--;
+ } else {
+ LASSERT (!the_lnet.ln_niinit_self);
+
+ lnet_proc_fini();
+ lnet_router_checker_stop();
+ lnet_ping_target_fini();
+
+ /* Teardown fns that use my own API functions BEFORE here */
+ the_lnet.ln_refcount = 0;
+
+ lnet_acceptor_stop();
+ lnet_destroy_routes();
+ lnet_shutdown_lndnis();
+ lnet_unprepare();
+ }
+
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(LNetNIFini);
+
+/**
+ * Grabs the ni data from the ni structure and fills the out
+ * parameters
+ *
+ * \param[in] ni network interface structure
+ * \param[out] cpt_count the number of cpts the ni is on
+ * \param[out] nid Network Interface ID
+ * \param[out] peer_timeout NI peer timeout
+ * \param[out] peer_tx_crdits NI peer transmit credits
+ * \param[out] peer_rtr_credits NI peer router credits
+ * \param[out] max_tx_credits NI max transmit credit
+ * \param[out] net_config Network configuration
+ */
+static void
+lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
+ int *peer_timeout, int *peer_tx_credits,
+ int *peer_rtr_credits, int *max_tx_credits,
+ struct lnet_ioctl_net_config *net_config)
+{
+ int i;
+
+ if (ni == NULL)
+ return;
+
+ if (net_config == NULL)
+ return;
+
+ CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
+ ARRAY_SIZE(net_config->ni_interfaces));
+
+ if (ni->ni_interfaces[0] != NULL) {
+ for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
+ if (ni->ni_interfaces[i] != NULL) {
+ strncpy(net_config->ni_interfaces[i],
+ ni->ni_interfaces[i],
+ sizeof(net_config->ni_interfaces[i]));
+ }
+ }
+ }
+
+ *nid = ni->ni_nid;
+ *peer_timeout = ni->ni_peertimeout;
+ *peer_tx_credits = ni->ni_peertxcredits;
+ *peer_rtr_credits = ni->ni_peerrtrcredits;
+ *max_tx_credits = ni->ni_maxtxcredits;
+
+ net_config->ni_status = ni->ni_status->ns_status;
+
+ for (i = 0;
+ ni->ni_cpts != NULL && i < ni->ni_ncpts &&
+ i < LNET_MAX_SHOW_NUM_CPT;
+ i++)
+ net_config->ni_cpts[i] = ni->ni_cpts[i];
+
+ *cpt_count = ni->ni_ncpts;
+}
+
+int
+lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
+ int *peer_tx_credits, int *peer_rtr_credits,
+ int *max_tx_credits,
+ struct lnet_ioctl_net_config *net_config)
+{
+ struct lnet_ni *ni;
+ struct list_head *tmp;
+ int cpt;
+ int rc = -ENOENT;
+
+ cpt = lnet_net_lock_current();
+
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
+ if (idx-- == 0) {
+ rc = 0;
+ lnet_ni_lock(ni);
+ lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
+ peer_tx_credits, peer_rtr_credits,
+ max_tx_credits, net_config);
+ lnet_ni_unlock(ni);
+ break;
+ }
+ }
+
+ lnet_net_unlock(cpt);
+ return rc;
+}
+
+int
+lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
+ __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
+ __s32 credits)
+{
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ struct lnet_ni *ni;
+ struct list_head net_head;
+ int rc;
+
+ INIT_LIST_HEAD(&net_head);
+
+ /* Create a ni structure for the network string */
+ rc = lnet_parse_networks(&net_head, nets);
+ if (rc < 0)
+ return rc;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+
+ if (rc > 1) {
+ rc = -EINVAL; /* only add one interface per call */
+ goto failed0;
+ }
+
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
+ false);
+ if (rc != 0)
+ goto failed0;
+
+ rc = lnet_startup_lndnis(&net_head, peer_timeout, peer_cr,
+ peer_buf_cr, credits, NULL);
+ if (rc != 0)
+ goto failed1;
+
+ lnet_ping_target_update(pinfo, md_handle);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return 0;
+
+failed1:
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+failed0:
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ while (!list_empty(&net_head)) {
+ ni = list_entry(net_head.next, struct lnet_ni, ni_list);
+ list_del_init(&ni->ni_list);
+ lnet_ni_free(ni);
+ }
+ return rc;
+}
+
+int
+lnet_dyn_del_ni(__u32 net)
+{
+ int rc;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_shutdown_lndni(net);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return rc;
+}
+
+/**
+ * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
+ * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
+ * internal ioctl handler.
+ *
+ * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
+ *
+ * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
+ * The data will be printed to system console. Don't use it excessively.
+ * \param arg A pointer to lnet_process_id_t, process ID of the peer.
+ *
+ * \return Always return 0 when called by users directly (i.e., not via ioctl).
+ */
+int
+LNetCtl(unsigned int cmd, void *arg)
+{
+ struct libcfs_ioctl_data *data = arg;
+ struct lnet_ioctl_config_data *config;
+ lnet_process_id_t id = {0};
+ lnet_ni_t *ni;
+ int rc;
+
+ LASSERT(the_lnet.ln_init);
+
+ switch (cmd) {
+ case IOC_LIBCFS_GET_NI:
+ rc = LNetGetId(data->ioc_count, &id);
+ data->ioc_nid = id.nid;
+ return rc;
+
+ case IOC_LIBCFS_FAIL_NID:
+ return lnet_fail_nid(data->ioc_nid, data->ioc_count);
+
+ case IOC_LIBCFS_ADD_ROUTE:
+ config = arg;
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_add_route(config->cfg_net,
+ config->cfg_config_u.cfg_route.rtr_hop,
+ config->cfg_nid,
+ config->cfg_config_u.cfg_route.
+ rtr_priority);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return (rc != 0) ? rc : lnet_check_routes();
+
+ case IOC_LIBCFS_DEL_ROUTE:
+ config = arg;
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_del_route(config->cfg_net, config->cfg_nid);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+
+ case IOC_LIBCFS_GET_ROUTE:
+ config = arg;
+ return lnet_get_route(config->cfg_count,
+ &config->cfg_net,
+ &config->cfg_config_u.cfg_route.rtr_hop,
+ &config->cfg_nid,
+ &config->cfg_config_u.cfg_route.rtr_flags,
+ &config->cfg_config_u.cfg_route.
+ rtr_priority);
+
+ case IOC_LIBCFS_GET_NET: {
+ struct lnet_ioctl_net_config *net_config;
+ config = arg;
+ net_config = (struct lnet_ioctl_net_config *)
+ config->cfg_bulk;
+ if (config == NULL || net_config == NULL)
+ return -1;
+
+ return lnet_get_net_config(config->cfg_count,
+ &config->cfg_ncpts,
+ &config->cfg_nid,
+ &config->cfg_config_u.
+ cfg_net.net_peer_timeout,
+ &config->cfg_config_u.cfg_net.
+ net_peer_tx_credits,
+ &config->cfg_config_u.cfg_net.
+ net_peer_rtr_credits,
+ &config->cfg_config_u.cfg_net.
+ net_max_tx_credits,
+ net_config);
+ }
+
+ case IOC_LIBCFS_GET_LNET_STATS:
+ {
+ struct lnet_ioctl_lnet_stats *lnet_stats = arg;
+
+ lnet_counters_get(&lnet_stats->st_cntrs);
+ return 0;
+ }
+
+#if defined(__KERNEL__) && defined(LNET_ROUTER)
+ case IOC_LIBCFS_CONFIG_RTR:
+ config = arg;
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ if (config->cfg_config_u.cfg_buffers.buf_enable) {
+ rc = lnet_rtrpools_enable();
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+ }
+ lnet_rtrpools_disable();
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return 0;
+
+ case IOC_LIBCFS_ADD_BUF:
+ config = arg;
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
+ buf_tiny,
+ config->cfg_config_u.cfg_buffers.
+ buf_small,
+ config->cfg_config_u.cfg_buffers.
+ buf_large);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+#endif
+
+ case IOC_LIBCFS_GET_BUF: {
+ struct lnet_ioctl_pool_cfg *pool_cfg;
+ config = arg;
+ pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
+ return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
+ }
+
+ case IOC_LIBCFS_GET_PEER_INFO: {
+ struct lnet_ioctl_peer *peer_info = arg;
+ return lnet_get_peer_info(
+ peer_info->pr_count,
+ &peer_info->pr_nid,
+ peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
+ }
+
+ case IOC_LIBCFS_NOTIFY_ROUTER:
+ return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
+ cfs_time_current() -
+ cfs_time_seconds(cfs_time_current_sec() -
+ (time_t)data->ioc_u64[0]));
+
+ case IOC_LIBCFS_PORTALS_COMPATIBILITY:
+ /* This can be removed once lustre stops calling it */
+ return 0;
+
+ case IOC_LIBCFS_LNET_DIST:
+ rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
+ if (rc < 0 && rc != -EHOSTUNREACH)
+ return rc;
+
+ data->ioc_u32[0] = rc;
+ return 0;
+
+ case IOC_LIBCFS_TESTPROTOCOMPAT:
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_testprotocompat = data->ioc_flags;
+ lnet_net_unlock(LNET_LOCK_EX);
+ return 0;
+
+ case IOC_LIBCFS_PING:
+ id.nid = data->ioc_nid;
+ id.pid = data->ioc_u32[0];
+ rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
+ (lnet_process_id_t __user *)data->ioc_pbuf1,
+ data->ioc_plen1/sizeof(lnet_process_id_t));
+ if (rc < 0)
+ return rc;
+ data->ioc_count = rc;
+ return 0;
+
+ case IOC_LIBCFS_DEBUG_PEER: {
+ /* CAVEAT EMPTOR: this one designed for calling directly; not
+ * via an ioctl */
+ id = *((lnet_process_id_t *) arg);
+
+ lnet_debug_peer(id.nid);
+
+ ni = lnet_net2ni(LNET_NIDNET(id.nid));
+ if (ni == NULL) {
+ CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
+ } else {
+ if (ni->ni_lnd->lnd_ctl == NULL) {
+ CDEBUG(D_WARNING, "No ctl for %s\n",
+ libcfs_id2str(id));
+ } else {
+ (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
+ }
+
+ lnet_ni_decref(ni);
+ }
+ return 0;
+ }
+
+ default:
+ ni = lnet_net2ni(data->ioc_net);
+ if (ni == NULL)
+ return -EINVAL;
+
+ if (ni->ni_lnd->lnd_ctl == NULL)
+ rc = -EINVAL;
+ else
+ rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
+
+ lnet_ni_decref(ni);
+ return rc;
+ }
+ /* not reached */
+}
+EXPORT_SYMBOL(LNetCtl);
+
+/**
+ * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
+ * all interfaces share a same PID, as requested by LNetNIInit().
+ *
+ * \param index Index of the interface to look up.
+ * \param id On successful return, this location will hold the
+ * lnet_process_id_t ID of the interface.
+ *
+ * \retval 0 If an interface exists at \a index.
+ * \retval -ENOENT If no interface has been found.
+ */
+int
+LNetGetId(unsigned int index, lnet_process_id_t *id)
+{
+ struct lnet_ni *ni;
+ struct list_head *tmp;
+ int cpt;
+ int rc = -ENOENT;
+
+ LASSERT(the_lnet.ln_init);
+ LASSERT(the_lnet.ln_refcount > 0);
+
+ cpt = lnet_net_lock_current();
+
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ if (index-- != 0)
+ continue;
+
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
+
+ id->nid = ni->ni_nid;
+ id->pid = the_lnet.ln_pid;
+ rc = 0;
+ break;
+ }
+
+ lnet_net_unlock(cpt);
+ return rc;
+}
+EXPORT_SYMBOL(LNetGetId);
+
+/**
+ * Print a string representation of handle \a h into buffer \a str of
+ * \a len bytes.
+ */
+void
+LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
+{
+ snprintf(str, len, LPX64, h.cookie);
+}
+EXPORT_SYMBOL(LNetSnprintHandle);
+
+static int
+lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
+ int n_ids)
+{
+ lnet_handle_eq_t eqh;
+ lnet_handle_md_t mdh;
+ lnet_event_t event;
+ lnet_md_t md = {0};
+ int which;
+ int unlinked = 0;
+ int replied = 0;
+ const int a_long_time = 60000; /* mS */
+ int infosz;
+ lnet_ping_info_t *info;
+ lnet_process_id_t tmpid;
+ int i;
+ int nob;
+ int rc;
+ int rc2;
+ sigset_t blocked;
+
+ infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
+
+ if (n_ids <= 0 ||
+ id.nid == LNET_NID_ANY ||
+ timeout_ms > 500000 || /* arbitrary limit! */
+ n_ids > 20) /* arbitrary limit! */
+ return -EINVAL;
+
+ if (id.pid == LNET_PID_ANY)
+ id.pid = LNET_PID_LUSTRE;
+
+ LIBCFS_ALLOC(info, infosz);
+ if (info == NULL)
+ return -ENOMEM;
+
+ /* NB 2 events max (including any unlink event) */
+ rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
+ if (rc != 0) {
+ CERROR("Can't allocate EQ: %d\n", rc);
+ goto out_0;
+ }
+
+ /* initialize md content */
+ md.start = info;
+ md.length = infosz;
+ md.threshold = 2; /*GET/REPLY*/
+ md.max_size = 0;
+ md.options = LNET_MD_TRUNCATE;
+ md.user_ptr = NULL;
+ md.eq_handle = eqh;
+
+ rc = LNetMDBind(md, LNET_UNLINK, &mdh);
+ if (rc != 0) {
+ CERROR("Can't bind MD: %d\n", rc);
+ goto out_1;
+ }
+
+ rc = LNetGet(LNET_NID_ANY, mdh, id,
+ LNET_RESERVED_PORTAL,
+ LNET_PROTO_PING_MATCHBITS, 0);
+
+ if (rc != 0) {
+ /* Don't CERROR; this could be deliberate! */
+
+ rc2 = LNetMDUnlink(mdh);
+ LASSERT(rc2 == 0);
+
+ /* NB must wait for the UNLINK event below... */
+ unlinked = 1;
+ timeout_ms = a_long_time;
+ }
+
+ do {
+ /* MUST block for unlink to complete */
+ if (unlinked)
+ blocked = cfs_block_allsigs();
+
+ rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
+
+ if (unlinked)
+ cfs_restore_sigs(blocked);
+
+ CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
+ (rc2 <= 0) ? -1 : event.type,
+ (rc2 <= 0) ? -1 : event.status,
+ (rc2 > 0 && event.unlinked) ? " unlinked" : "");
+
+ LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
+
+ if (rc2 <= 0 || event.status != 0) {
+ /* timeout or error */
+ if (!replied && rc == 0)
+ rc = (rc2 < 0) ? rc2 :
+ (rc2 == 0) ? -ETIMEDOUT :
+ event.status;
+
+ if (!unlinked) {
+ /* Ensure completion in finite time... */
+ LNetMDUnlink(mdh);
+ /* No assertion (racing with network) */
+ unlinked = 1;
+ timeout_ms = a_long_time;
+ } else if (rc2 == 0) {
+ /* timed out waiting for unlink */
+ CWARN("ping %s: late network completion\n",
+ libcfs_id2str(id));
+ }
+ } else if (event.type == LNET_EVENT_REPLY) {
+ replied = 1;
+ rc = event.mlength;
+ }
+
+ } while (rc2 <= 0 || !event.unlinked);
+
+ if (!replied) {
+ if (rc >= 0)
+ CWARN("%s: Unexpected rc >= 0 but no reply!\n",
+ libcfs_id2str(id));
+ rc = -EIO;
+ goto out_1;
+ }
+
+ nob = rc;
+ LASSERT(nob >= 0 && nob <= infosz);
+
+ rc = -EPROTO; /* if I can't parse... */
+
+ if (nob < 8) {
+ /* can't check magic/version */
+ CERROR("%s: ping info too short %d\n",
+ libcfs_id2str(id), nob);
+ goto out_1;
+ }
+
+ if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
+ lnet_swap_pinginfo(info);
+ } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
+ CERROR("%s: Unexpected magic %08x\n",
+ libcfs_id2str(id), info->pi_magic);
+ goto out_1;
+ }
+
+ if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
+ CERROR("%s: ping w/o NI status: 0x%x\n",
+ libcfs_id2str(id), info->pi_features);
+ goto out_1;
+ }
+
+ if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
+ CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
+ nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
+ goto out_1;
+ }
+
+ if (info->pi_nnis < n_ids)
+ n_ids = info->pi_nnis;
+
+ if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
+ CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
+ nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
+ goto out_1;
+ }
+
+ rc = -EFAULT; /* If I SEGV... */
+
+ for (i = 0; i < n_ids; i++) {
+ tmpid.pid = info->pi_pid;
+ tmpid.nid = info->pi_ni[i].ns_nid;
+ if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
+ goto out_1;
+ }
+ rc = info->pi_nnis;
+
+ out_1:
+ rc2 = LNetEQFree(eqh);
+ if (rc2 != 0)
+ CERROR("rc2 %d\n", rc2);
+ LASSERT(rc2 == 0);