/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * 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. * * GPL HEADER END */ /* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #define DEBUG_SUBSYSTEM S_LNET #include #include #ifdef __KERNEL__ #include #endif #ifdef __KERNEL__ #define D_LNI D_CONSOLE #else #define D_LNI D_CONFIG #endif lnet_t the_lnet; /* THE state of the network */ EXPORT_SYMBOL(the_lnet); #ifdef __KERNEL__ static char *ip2nets = ""; CFS_MODULE_PARM(ip2nets, "s", charp, 0444, "LNET network <- IP table"); static char *networks = ""; CFS_MODULE_PARM(networks, "s", charp, 0444, "local networks"); static char *routes = ""; CFS_MODULE_PARM(routes, "s", charp, 0444, "routes to non-local networks"); static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT; CFS_MODULE_PARM(rnet_htable_size, "i", int, 0444, "size of remote network hash table"); static void lnet_ping_target_fini(void); static int lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids); static char * lnet_get_routes(void) { return routes; } static char * lnet_get_networks(void) { char *nets; int rc; if (*networks != 0 && *ip2nets != 0) { LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or " "'ip2nets' but not both at once\n"); return NULL; } if (*ip2nets != 0) { rc = lnet_parse_ip2nets(&nets, ip2nets); return (rc == 0) ? nets : NULL; } if (*networks != 0) return networks; return "tcp"; } static void lnet_init_locks(void) { spin_lock_init(&the_lnet.ln_eq_wait_lock); init_waitqueue_head(&the_lnet.ln_eq_waitq); mutex_init(&the_lnet.ln_lnd_mutex); mutex_init(&the_lnet.ln_api_mutex); } static void lnet_fini_locks(void) { } #else static char * lnet_get_routes(void) { char *str = getenv("LNET_ROUTES"); return (str == NULL) ? "" : str; } static char * lnet_get_networks (void) { static char default_networks[256]; char *networks = getenv("LNET_NETWORKS"); char *str; char *sep; int len; int nob; struct list_head *tmp; if (networks != NULL) return networks; /* In userland, the default 'networks=' is the list of known net types */ len = sizeof(default_networks); str = default_networks; *str = 0; sep = ""; list_for_each(tmp, &the_lnet.ln_lnds) { lnd_t *lnd = list_entry(tmp, lnd_t, lnd_list); nob = snprintf(str, len, "%s%s", sep, libcfs_lnd2str(lnd->lnd_type)); if (nob >= len) { /* overflowed the string; leave it where it was */ *str = 0; break; } len -= nob; str += nob; sep = ","; } return default_networks; } # ifndef HAVE_LIBPTHREAD static void lnet_init_locks(void) { the_lnet.ln_eq_wait_lock = 0; the_lnet.ln_lnd_mutex = 0; the_lnet.ln_api_mutex = 0; } static void lnet_fini_locks(void) { LASSERT(the_lnet.ln_api_mutex == 0); LASSERT(the_lnet.ln_lnd_mutex == 0); LASSERT(the_lnet.ln_eq_wait_lock == 0); } # else static void lnet_init_locks(void) { pthread_cond_init(&the_lnet.ln_eq_cond, NULL); pthread_mutex_init(&the_lnet.ln_eq_wait_lock, NULL); pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL); pthread_mutex_init(&the_lnet.ln_api_mutex, NULL); } static void lnet_fini_locks(void) { pthread_mutex_destroy(&the_lnet.ln_api_mutex); pthread_mutex_destroy(&the_lnet.ln_lnd_mutex); pthread_mutex_destroy(&the_lnet.ln_eq_wait_lock); pthread_cond_destroy(&the_lnet.ln_eq_cond); } # endif #endif static int lnet_create_remote_nets_table(void) { int i; struct list_head *hash; LASSERT(the_lnet.ln_remote_nets_hash == NULL); LASSERT(the_lnet.ln_remote_nets_hbits > 0); LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash)); if (hash == NULL) { CERROR("Failed to create remote nets hash table\n"); return -ENOMEM; } for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) INIT_LIST_HEAD(&hash[i]); the_lnet.ln_remote_nets_hash = hash; return 0; } static void lnet_destroy_remote_nets_table(void) { int i; if (the_lnet.ln_remote_nets_hash == NULL) return; for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i])); LIBCFS_FREE(the_lnet.ln_remote_nets_hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(the_lnet.ln_remote_nets_hash[0])); the_lnet.ln_remote_nets_hash = NULL; } static void lnet_destroy_locks(void) { if (the_lnet.ln_res_lock != NULL) { cfs_percpt_lock_free(the_lnet.ln_res_lock); the_lnet.ln_res_lock = NULL; } if (the_lnet.ln_net_lock != NULL) { cfs_percpt_lock_free(the_lnet.ln_net_lock); the_lnet.ln_net_lock = NULL; } lnet_fini_locks(); } static int lnet_create_locks(void) { lnet_init_locks(); the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table()); if (the_lnet.ln_res_lock == NULL) goto failed; the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table()); if (the_lnet.ln_net_lock == NULL) goto failed; return 0; failed: lnet_destroy_locks(); return -ENOMEM; } static void lnet_assert_wire_constants(void) { /* Wire protocol assertions generated by 'wirecheck' * running on Linux robert.bartonsoftware.com 2.6.8-1.521 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */ /* Constants... */ CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded); CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1); CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0); CLASSERT (LNET_MSG_ACK == 0); CLASSERT (LNET_MSG_PUT == 1); CLASSERT (LNET_MSG_GET == 2); CLASSERT (LNET_MSG_REPLY == 3); CLASSERT (LNET_MSG_HELLO == 4); /* Checks for struct ptl_handle_wire_t */ CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16); CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0); CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8); CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8); CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8); /* Checks for struct lnet_magicversion_t */ CLASSERT ((int)sizeof(lnet_magicversion_t) == 8); CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0); CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4); CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4); CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2); CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6); CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2); /* Checks for struct lnet_hdr_t */ CLASSERT ((int)sizeof(lnet_hdr_t) == 72); CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40); /* Ack */ CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16); CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4); /* Put */ CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16); CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4); /* Get */ CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16); CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4); CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4); /* Reply */ CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16); /* Hello */ CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8); CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40); CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4); } static lnd_t * lnet_find_lnd_by_type (int type) { lnd_t *lnd; struct list_head *tmp; /* holding lnd mutex */ list_for_each(tmp, &the_lnet.ln_lnds) { lnd = list_entry(tmp, lnd_t, lnd_list); if ((int)lnd->lnd_type == type) return lnd; } return NULL; } void lnet_register_lnd (lnd_t *lnd) { LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex); LASSERT(the_lnet.ln_init); LASSERT(libcfs_isknown_lnd(lnd->lnd_type)); LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL); list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds); lnd->lnd_refcount = 0; CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type)); LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex); } EXPORT_SYMBOL(lnet_register_lnd); void lnet_unregister_lnd (lnd_t *lnd) { LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex); LASSERT(the_lnet.ln_init); LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd); LASSERT(lnd->lnd_refcount == 0); list_del(&lnd->lnd_list); CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type)); LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex); } EXPORT_SYMBOL(lnet_unregister_lnd); void lnet_counters_get(lnet_counters_t *counters) { lnet_counters_t *ctr; int i; memset(counters, 0, sizeof(*counters)); lnet_net_lock(LNET_LOCK_EX); cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) { counters->msgs_max += ctr->msgs_max; counters->msgs_alloc += ctr->msgs_alloc; counters->errors += ctr->errors; counters->send_count += ctr->send_count; counters->recv_count += ctr->recv_count; counters->route_count += ctr->route_count; counters->drop_count += ctr->drop_count; counters->send_length += ctr->send_length; counters->recv_length += ctr->recv_length; counters->route_length += ctr->route_length; counters->drop_length += ctr->drop_length; } lnet_net_unlock(LNET_LOCK_EX); } EXPORT_SYMBOL(lnet_counters_get); void lnet_counters_reset(void) { lnet_counters_t *counters; int i; lnet_net_lock(LNET_LOCK_EX); cfs_percpt_for_each(counters, i, the_lnet.ln_counters) memset(counters, 0, sizeof(lnet_counters_t)); lnet_net_unlock(LNET_LOCK_EX); } EXPORT_SYMBOL(lnet_counters_reset); #ifdef LNET_USE_LIB_FREELIST int lnet_freelist_init(lnet_freelist_t *fl, int n, int size) { char *space; LASSERT (n > 0); size += offsetof (lnet_freeobj_t, fo_contents); LIBCFS_ALLOC(space, n * size); if (space == NULL) return (-ENOMEM); INIT_LIST_HEAD(&fl->fl_list); fl->fl_objs = space; fl->fl_nobjs = n; fl->fl_objsize = size; do { list_add((struct list_head *)space, &fl->fl_list); space += size; } while (--n != 0); return 0; } void lnet_freelist_fini(lnet_freelist_t *fl) { struct list_head *el; int count; if (fl->fl_nobjs == 0) return; count = 0; for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next) count++; LASSERT (count == fl->fl_nobjs); LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize); memset (fl, 0, sizeof (*fl)); } #endif /* LNET_USE_LIB_FREELIST */ static __u64 lnet_create_interface_cookie(void) { /* NB the interface cookie in wire handles guards against delayed * replies and ACKs appearing valid after reboot. Initialisation time, * even if it's only implemented to millisecond resolution is probably * easily good enough. */ struct timeval tv; __u64 cookie; #ifndef __KERNEL__ int rc = gettimeofday (&tv, NULL); LASSERT (rc == 0); #else do_gettimeofday(&tv); #endif cookie = tv.tv_sec; cookie *= 1000000; cookie += tv.tv_usec; return cookie; } static char * lnet_res_type2str(int type) { switch (type) { default: LBUG(); case LNET_COOKIE_TYPE_MD: return "MD"; case LNET_COOKIE_TYPE_ME: return "ME"; case LNET_COOKIE_TYPE_EQ: return "EQ"; } } static void lnet_res_container_cleanup(struct lnet_res_container *rec) { int count = 0; if (rec->rec_type == 0) /* not set yet, it's uninitialized */ return; while (!list_empty(&rec->rec_active)) { struct list_head *e = rec->rec_active.next; list_del_init(e); if (rec->rec_type == LNET_COOKIE_TYPE_EQ) { lnet_eq_free(list_entry(e, lnet_eq_t, eq_list)); } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) { lnet_md_free(list_entry(e, lnet_libmd_t, md_list)); } else { /* NB: Active MEs should be attached on portals */ LBUG(); } count++; } if (count > 0) { /* Found alive MD/ME/EQ, user really should unlink/free * all of them before finalize LNet, but if someone didn't, * we have to recycle garbage for him */ CERROR("%d active elements on exit of %s container\n", count, lnet_res_type2str(rec->rec_type)); } #ifdef LNET_USE_LIB_FREELIST lnet_freelist_fini(&rec->rec_freelist); #endif if (rec->rec_lh_hash != NULL) { LIBCFS_FREE(rec->rec_lh_hash, LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0])); rec->rec_lh_hash = NULL; } rec->rec_type = 0; /* mark it as finalized */ } static int lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type, int objnum, int objsz) { int rc = 0; int i; LASSERT(rec->rec_type == 0); rec->rec_type = type; INIT_LIST_HEAD(&rec->rec_active); #ifdef LNET_USE_LIB_FREELIST memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist)); rc = lnet_freelist_init(&rec->rec_freelist, objnum, objsz); if (rc != 0) goto out; #endif rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type; /* Arbitrary choice of hash table size */ LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt, LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0])); if (rec->rec_lh_hash == NULL) { rc = -ENOMEM; goto out; } for (i = 0; i < LNET_LH_HASH_SIZE; i++) INIT_LIST_HEAD(&rec->rec_lh_hash[i]); return 0; out: CERROR("Failed to setup %s resource container\n", lnet_res_type2str(type)); lnet_res_container_cleanup(rec); return rc; } static void lnet_res_containers_destroy(struct lnet_res_container **recs) { struct lnet_res_container *rec; int i; cfs_percpt_for_each(rec, i, recs) lnet_res_container_cleanup(rec); cfs_percpt_free(recs); } static struct lnet_res_container ** lnet_res_containers_create(int type, int objnum, int objsz) { struct lnet_res_container **recs; struct lnet_res_container *rec; int rc; int i; recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec)); if (recs == NULL) { CERROR("Failed to allocate %s resource containers\n", lnet_res_type2str(type)); return NULL; } cfs_percpt_for_each(rec, i, recs) { rc = lnet_res_container_setup(rec, i, type, objnum, objsz); if (rc != 0) { lnet_res_containers_destroy(recs); return NULL; } } return recs; } lnet_libhandle_t * lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie) { /* ALWAYS called with lnet_res_lock held */ struct list_head *head; lnet_libhandle_t *lh; unsigned int hash; if ((cookie & LNET_COOKIE_MASK) != rec->rec_type) return NULL; hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS); head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK]; list_for_each_entry(lh, head, lh_hash_chain) { if (lh->lh_cookie == cookie) return lh; } return NULL; } void lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh) { /* ALWAYS called with lnet_res_lock held */ unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS; unsigned int hash; lh->lh_cookie = rec->rec_lh_cookie; rec->rec_lh_cookie += 1 << ibits; hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK; list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]); } #ifndef __KERNEL__ /** * Reserved API - do not use. * Temporary workaround to allow uOSS and test programs force server * mode in userspace. See comments near ln_server_mode_flag in * lnet/lib-types.h */ void lnet_server_mode() { the_lnet.ln_server_mode_flag = 1; } #endif static int lnet_unprepare(void); static int lnet_prepare(lnet_pid_t requested_pid) { /* Prepare to bring up the network */ struct lnet_res_container **recs; int rc = 0; if (requested_pid == LNET_PID_ANY) { /* Don't instantiate LNET just for me */ return -ENETDOWN; } LASSERT (the_lnet.ln_refcount == 0); the_lnet.ln_routing = 0; #ifdef __KERNEL__ LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0); the_lnet.ln_pid = requested_pid; #else if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */ LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0); if (current_uid() != 0) /* Only root can run user-space server */ return -EPERM; the_lnet.ln_pid = requested_pid; } else {/* client case (liblustre) */ /* My PID must be unique on this node and flag I'm userspace */ the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG; } #endif INIT_LIST_HEAD(&the_lnet.ln_test_peers); INIT_LIST_HEAD(&the_lnet.ln_nis); INIT_LIST_HEAD(&the_lnet.ln_nis_cpt); INIT_LIST_HEAD(&the_lnet.ln_nis_zombie); INIT_LIST_HEAD(&the_lnet.ln_routers); INIT_LIST_HEAD(&the_lnet.ln_drop_rules); INIT_LIST_HEAD(&the_lnet.ln_delay_rules); rc = lnet_create_remote_nets_table(); if (rc != 0) goto failed; the_lnet.ln_interface_cookie = lnet_create_interface_cookie(); the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(), sizeof(lnet_counters_t)); if (the_lnet.ln_counters == NULL) { CERROR("Failed to allocate counters for LNet\n"); rc = -ENOMEM; goto failed; } rc = lnet_peer_tables_create(); if (rc != 0) goto failed; rc = lnet_msg_containers_create(); if (rc != 0) goto failed; rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0, LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS, sizeof(lnet_eq_t)); if (rc != 0) goto failed; recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES, sizeof(lnet_me_t)); if (recs == NULL) goto failed; the_lnet.ln_me_containers = recs; recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS, sizeof(lnet_libmd_t)); if (recs == NULL) goto failed; the_lnet.ln_md_containers = recs; rc = lnet_portals_create(); if (rc != 0) { CERROR("Failed to create portals for LNet: %d\n", rc); goto failed; } return 0; failed: lnet_unprepare(); return rc; } static int lnet_unprepare (void) { /* NB no LNET_LOCK since this is the last reference. All LND instances * have shut down already, so it is safe to unlink and free all * descriptors, even those that appear committed to a network op (eg MD * with non-zero pending count) */ lnet_fail_nid(LNET_NID_ANY, 0); LASSERT(the_lnet.ln_refcount == 0); LASSERT(list_empty(&the_lnet.ln_test_peers)); LASSERT(list_empty(&the_lnet.ln_nis)); LASSERT(list_empty(&the_lnet.ln_nis_cpt)); LASSERT(list_empty(&the_lnet.ln_nis_zombie)); lnet_portals_destroy(); if (the_lnet.ln_md_containers != NULL) { lnet_res_containers_destroy(the_lnet.ln_md_containers); the_lnet.ln_md_containers = NULL; } if (the_lnet.ln_me_containers != NULL) { lnet_res_containers_destroy(the_lnet.ln_me_containers); the_lnet.ln_me_containers = NULL; } lnet_res_container_cleanup(&the_lnet.ln_eq_container); lnet_msg_containers_destroy(); lnet_peer_tables_destroy(); lnet_rtrpools_free(0); if (the_lnet.ln_counters != NULL) { cfs_percpt_free(the_lnet.ln_counters); the_lnet.ln_counters = NULL; } lnet_destroy_remote_nets_table(); return 0; } lnet_ni_t * lnet_net2ni_locked(__u32 net, int cpt) { struct list_head *tmp; lnet_ni_t *ni; LASSERT(cpt != LNET_LOCK_EX); list_for_each(tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (LNET_NIDNET(ni->ni_nid) == net) { lnet_ni_addref_locked(ni, cpt); return ni; } } return NULL; } lnet_ni_t * lnet_net2ni(__u32 net) { lnet_ni_t *ni; lnet_net_lock(0); ni = lnet_net2ni_locked(net, 0); lnet_net_unlock(0); return ni; } EXPORT_SYMBOL(lnet_net2ni); static unsigned int lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number) { __u64 key = nid; unsigned int val; LASSERT(number >= 1 && number <= LNET_CPT_NUMBER); if (number == 1) return 0; val = hash_long(key, LNET_CPT_BITS); /* NB: LNET_CP_NUMBER doesn't have to be PO2 */ if (val < number) return val; return (unsigned int)(key + val + (val >> 1)) % number; } int lnet_cpt_of_nid_locked(lnet_nid_t nid) { struct lnet_ni *ni; /* must called with hold of lnet_net_lock */ if (LNET_CPT_NUMBER == 1) return 0; /* the only one */ /* take lnet_net_lock(any) would be OK */ if (!list_empty(&the_lnet.ln_nis_cpt)) { list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) { if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid)) continue; LASSERT(ni->ni_cpts != NULL); return ni->ni_cpts[lnet_nid_cpt_hash (nid, ni->ni_ncpts)]; } } return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER); } int lnet_cpt_of_nid(lnet_nid_t nid) { int cpt; int cpt2; if (LNET_CPT_NUMBER == 1) return 0; /* the only one */ if (list_empty(&the_lnet.ln_nis_cpt)) return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER); cpt = lnet_net_lock_current(); cpt2 = lnet_cpt_of_nid_locked(nid); lnet_net_unlock(cpt); return cpt2; } EXPORT_SYMBOL(lnet_cpt_of_nid); int lnet_islocalnet(__u32 net) { struct lnet_ni *ni; int cpt; cpt = lnet_net_lock_current(); ni = lnet_net2ni_locked(net, cpt); if (ni != NULL) lnet_ni_decref_locked(ni, cpt); lnet_net_unlock(cpt); return ni != NULL; } lnet_ni_t * lnet_nid2ni_locked(lnet_nid_t nid, int cpt) { struct lnet_ni *ni; struct list_head *tmp; LASSERT(cpt != LNET_LOCK_EX); list_for_each(tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (ni->ni_nid == nid) { lnet_ni_addref_locked(ni, cpt); return ni; } } return NULL; } int lnet_islocalnid(lnet_nid_t nid) { struct lnet_ni *ni; int cpt; cpt = lnet_net_lock_current(); ni = lnet_nid2ni_locked(nid, cpt); if (ni != NULL) lnet_ni_decref_locked(ni, cpt); lnet_net_unlock(cpt); return ni != NULL; } int lnet_count_acceptor_nis (void) { /* Return the # of NIs that need the acceptor. */ int count = 0; #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) struct list_head *tmp; struct lnet_ni *ni; int cpt; cpt = lnet_net_lock_current(); list_for_each(tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (ni->ni_lnd->lnd_accept != NULL) count++; } lnet_net_unlock(cpt); #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */ return count; } static lnet_ping_info_t * lnet_ping_info_create(int num_ni) { 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; } /* * Callers of lnet_startup_lndnis need to clean up using * lnet_shutdown_lndnis if startup fails */ 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 failed2; 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_fault_init(); 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_fault_fini(); 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; CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) + sizeof(struct lnet_ioctl_config_data)); 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_LNET_FAULT: return lnet_fault_ctl(data->ioc_flags, data); 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); out_0: LIBCFS_FREE(info, infosz); return rc; }