diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/lnet/api-ni.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/lnet/api-ni.c | 2307 |
1 files changed, 0 insertions, 2307 deletions
diff --git a/drivers/staging/lustre/lnet/lnet/api-ni.c b/drivers/staging/lustre/lnet/lnet/api-ni.c deleted file mode 100644 index f9ed6977056c..000000000000 --- a/drivers/staging/lustre/lnet/lnet/api-ni.c +++ /dev/null @@ -1,2307 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, 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 <linux/log2.h> -#include <linux/ktime.h> - -#include <linux/lnet/lib-lnet.h> -#include <uapi/linux/lnet/lnet-dlc.h> - -#define D_LNI D_CONSOLE - -struct lnet the_lnet; /* THE state of the network */ -EXPORT_SYMBOL(the_lnet); - -static char *ip2nets = ""; -module_param(ip2nets, charp, 0444); -MODULE_PARM_DESC(ip2nets, "LNET network <- IP table"); - -static char *networks = ""; -module_param(networks, charp, 0444); -MODULE_PARM_DESC(networks, "local networks"); - -static char *routes = ""; -module_param(routes, charp, 0444); -MODULE_PARM_DESC(routes, "routes to non-local networks"); - -static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT; -module_param(rnet_htable_size, int, 0444); -MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table"); - -static int lnet_ping(struct lnet_process_id id, int timeout_ms, - struct lnet_process_id __user *ids, int n_ids); - -static char * -lnet_get_routes(void) -{ - return routes; -} - -static char * -lnet_get_networks(void) -{ - char *nets; - int rc; - - if (*networks && *ip2nets) { - LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or 'ip2nets' but not both at once\n"); - return NULL; - } - - if (*ip2nets) { - rc = lnet_parse_ip2nets(&nets, ip2nets); - return !rc ? nets : NULL; - } - - if (*networks) - 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); - init_waitqueue_head(&the_lnet.ln_rc_waitq); - mutex_init(&the_lnet.ln_lnd_mutex); - mutex_init(&the_lnet.ln_api_mutex); -} - -static int -lnet_create_remote_nets_table(void) -{ - int i; - struct list_head *hash; - - LASSERT(!the_lnet.ln_remote_nets_hash); - LASSERT(the_lnet.ln_remote_nets_hbits > 0); - hash = kvmalloc_array(LNET_REMOTE_NETS_HASH_SIZE, sizeof(*hash), - GFP_KERNEL); - if (!hash) { - 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) - return; - - for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) - LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i])); - - kvfree(the_lnet.ln_remote_nets_hash); - the_lnet.ln_remote_nets_hash = NULL; -} - -static void -lnet_destroy_locks(void) -{ - if (the_lnet.ln_res_lock) { - cfs_percpt_lock_free(the_lnet.ln_res_lock); - the_lnet.ln_res_lock = NULL; - } - - if (the_lnet.ln_net_lock) { - cfs_percpt_lock_free(the_lnet.ln_net_lock); - the_lnet.ln_net_lock = NULL; - } -} - -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) - goto failed; - - the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table()); - if (!the_lnet.ln_net_lock) - 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... */ - BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded); - BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1); - BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0); - BUILD_BUG_ON(LNET_MSG_ACK != 0); - BUILD_BUG_ON(LNET_MSG_PUT != 1); - BUILD_BUG_ON(LNET_MSG_GET != 2); - BUILD_BUG_ON(LNET_MSG_REPLY != 3); - BUILD_BUG_ON(LNET_MSG_HELLO != 4); - - /* Checks for struct ptl_handle_wire_t */ - BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16); - BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire, wh_interface_cookie) != 0); - BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire, wh_object_cookie) != 8); - BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8); - - /* Checks for struct struct lnet_magicversion */ - BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0); - BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4); - BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2); - BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_minor) != 6); - BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2); - - /* Checks for struct struct lnet_hdr */ - BUILD_BUG_ON((int)sizeof(struct lnet_hdr) != 72); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_nid) != 0); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_nid) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_nid) != 8); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_nid) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_pid) != 16); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_pid) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_pid) != 20); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_pid) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, type) != 24); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->type) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, payload_length) != 28); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->payload_length) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg) != 40); - - /* Ack */ - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) != 16); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.match_bits) != 48); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.mlength) != 56); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) != 4); - - /* Put */ - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) != 16); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.match_bits) != 48); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.hdr_data) != 56); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ptl_index) != 64); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.offset) != 68); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) != 4); - - /* Get */ - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.return_wmd) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) != 16); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.match_bits) != 48); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.ptl_index) != 56); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.src_offset) != 60); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) != 4); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.sink_length) != 64); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) != 4); - - /* Reply */ - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) != 16); - - /* Hello */ - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.incarnation) != 32); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) != 8); - BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.type) != 40); - BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) != 4); -} - -static struct lnet_lnd * -lnet_find_lnd_by_type(__u32 type) -{ - struct lnet_lnd *lnd; - struct list_head *tmp; - - /* holding lnd mutex */ - list_for_each(tmp, &the_lnet.ln_lnds) { - lnd = list_entry(tmp, struct lnet_lnd, lnd_list); - - if (lnd->lnd_type == type) - return lnd; - } - - return NULL; -} - -void -lnet_register_lnd(struct lnet_lnd *lnd) -{ - mutex_lock(&the_lnet.ln_lnd_mutex); - - LASSERT(libcfs_isknown_lnd(lnd->lnd_type)); - LASSERT(!lnet_find_lnd_by_type(lnd->lnd_type)); - - 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)); - - mutex_unlock(&the_lnet.ln_lnd_mutex); -} -EXPORT_SYMBOL(lnet_register_lnd); - -void -lnet_unregister_lnd(struct lnet_lnd *lnd) -{ - mutex_lock(&the_lnet.ln_lnd_mutex); - - LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd); - LASSERT(!lnd->lnd_refcount); - - list_del(&lnd->lnd_list); - CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type)); - - mutex_unlock(&the_lnet.ln_lnd_mutex); -} -EXPORT_SYMBOL(lnet_unregister_lnd); - -void -lnet_counters_get(struct lnet_counters *counters) -{ - struct lnet_counters *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) -{ - struct lnet_counters *counters; - int i; - - lnet_net_lock(LNET_LOCK_EX); - - cfs_percpt_for_each(counters, i, the_lnet.ln_counters) - memset(counters, 0, sizeof(struct lnet_counters)); - - lnet_net_unlock(LNET_LOCK_EX); -} - -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) /* 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) { - kfree(list_entry(e, struct lnet_eq, eq_list)); - - } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) { - kfree(list_entry(e, struct lnet_libmd, 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)); - } - - kfree(rec->rec_lh_hash); - 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 rc = 0; - int i; - - LASSERT(!rec->rec_type); - - rec->rec_type = type; - INIT_LIST_HEAD(&rec->rec_active); - rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type; - - /* Arbitrary choice of hash table size */ - rec->rec_lh_hash = kvmalloc_cpt(LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]), - GFP_KERNEL, cpt); - if (!rec->rec_lh_hash) { - 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) -{ - 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) { - 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); - if (rc) { - lnet_res_containers_destroy(recs); - return NULL; - } - } - - return recs; -} - -struct lnet_libhandle * -lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie) -{ - /* ALWAYS called with lnet_res_lock held */ - struct list_head *head; - struct lnet_libhandle *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, - struct lnet_libhandle *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]); -} - -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); - - the_lnet.ln_routing = 0; - - LASSERT(!(requested_pid & LNET_PID_USERFLAG)); - the_lnet.ln_pid = requested_pid; - - 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) - goto failed; - /* - * NB the interface cookie in wire handles guards against delayed - * replies and ACKs appearing valid after reboot. - */ - the_lnet.ln_interface_cookie = ktime_get_ns(); - - the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(), - sizeof(struct lnet_counters)); - if (!the_lnet.ln_counters) { - CERROR("Failed to allocate counters for LNet\n"); - rc = -ENOMEM; - goto failed; - } - - rc = lnet_peer_tables_create(); - if (rc) - goto failed; - - rc = lnet_msg_containers_create(); - if (rc) - goto failed; - - rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0, - LNET_COOKIE_TYPE_EQ); - if (rc) - goto failed; - - recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME); - if (!recs) { - rc = -ENOMEM; - goto failed; - } - - the_lnet.ln_me_containers = recs; - - recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD); - if (!recs) { - rc = -ENOMEM; - goto failed; - } - - the_lnet.ln_md_containers = recs; - - rc = lnet_portals_create(); - if (rc) { - 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); - 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) { - lnet_res_containers_destroy(the_lnet.ln_md_containers); - the_lnet.ln_md_containers = NULL; - } - - if (the_lnet.ln_me_containers) { - 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) { - cfs_percpt_free(the_lnet.ln_counters); - the_lnet.ln_counters = NULL; - } - lnet_destroy_remote_nets_table(); - - return 0; -} - -struct lnet_ni * -lnet_net2ni_locked(__u32 net, int cpt) -{ - struct list_head *tmp; - struct lnet_ni *ni; - - LASSERT(cpt != LNET_LOCK_EX); - - list_for_each(tmp, &the_lnet.ln_nis) { - ni = list_entry(tmp, struct lnet_ni, ni_list); - - if (LNET_NIDNET(ni->ni_nid) == net) { - lnet_ni_addref_locked(ni, cpt); - return ni; - } - } - - return NULL; -} - -struct lnet_ni * -lnet_net2ni(__u32 net) -{ - struct lnet_ni *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); - 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) - lnet_ni_decref_locked(ni, cpt); - - lnet_net_unlock(cpt); - - return !!ni; -} - -struct lnet_ni * -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, struct lnet_ni, 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) - lnet_ni_decref_locked(ni, cpt); - lnet_net_unlock(cpt); - - return !!ni; -} - -int -lnet_count_acceptor_nis(void) -{ - /* Return the # of NIs that need the acceptor. */ - int count = 0; - 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, struct lnet_ni, ni_list); - - if (ni->ni_lnd->lnd_accept) - count++; - } - - lnet_net_unlock(cpt); - - return count; -} - -static struct lnet_ping_info * -lnet_ping_info_create(int num_ni) -{ - struct lnet_ping_info *ping_info; - unsigned int infosz; - - infosz = offsetof(struct lnet_ping_info, pi_ni[num_ni]); - ping_info = kvzalloc(infosz, GFP_KERNEL); - if (!ping_info) { - 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(struct lnet_ping_info *pinfo) -{ - kvfree(pinfo); -} - -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(struct lnet_event *event) -{ - struct lnet_ping_info *pinfo = event->md.user_ptr; - - if (event->unlinked) - pinfo->pi_features = LNET_PING_FEAT_INVAL; -} - -static int -lnet_ping_info_setup(struct lnet_ping_info **ppinfo, - struct lnet_handle_md *md_handle, - int ni_count, bool set_eq) -{ - struct lnet_process_id id = {LNET_NID_ANY, LNET_PID_ANY}; - struct lnet_handle_me me_handle; - struct lnet_md md = { NULL }; - int rc, rc2; - - if (set_eq) { - rc = LNetEQAlloc(0, lnet_ping_event_handler, - &the_lnet.ln_ping_target_eq); - if (rc) { - CERROR("Can't allocate ping EQ: %d\n", rc); - return rc; - } - } - - *ppinfo = lnet_ping_info_create(ni_count); - if (!*ppinfo) { - 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) { - CERROR("Can't create ping ME: %d\n", rc); - goto failed_1; - } - - /* initialize md content */ - md.start = *ppinfo; - md.length = offsetof(struct lnet_ping_info, - 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) { - CERROR("Can't attach ping MD: %d\n", rc); - goto failed_2; - } - - return 0; - -failed_2: - rc2 = LNetMEUnlink(me_handle); - LASSERT(!rc2); -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(struct lnet_ping_info *pinfo, - struct lnet_handle_md *md_handle) -{ - LNetMDUnlink(*md_handle); - LNetInvalidateMDHandle(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"); - set_current_state(TASK_NOLOAD); - schedule_timeout(HZ); - } -} - -static void -lnet_ping_info_install_locked(struct lnet_ping_info *ping_info) -{ - struct lnet_ni_status *ns; - struct lnet_ni *ni; - int 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) ? - ni->ni_status->ns_status : LNET_NI_STATUS_UP; - ni->ni_status = ns; - lnet_ni_unlock(ni); - - i++; - } -} - -static void -lnet_ping_target_update(struct lnet_ping_info *pinfo, - struct lnet_handle_md md_handle) -{ - struct lnet_ping_info *old_pinfo = NULL; - struct lnet_handle_md 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) { - 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) { - /* 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); - - lnet_ping_info_destroy(); -} - -static int -lnet_ni_tq_credits(struct lnet_ni *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_ni_unlink_locked(struct lnet_ni *ni) -{ - if (!list_empty(&ni->ni_cptlist)) { - list_del_init(&ni->ni_cptlist); - lnet_ni_decref_locked(ni, 0); - } - - /* move it to zombie list and nobody can find it anymore */ - LASSERT(!list_empty(&ni->ni_list)); - list_move(&ni->ni_list, &the_lnet.ln_nis_zombie); - lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */ -} - -static void -lnet_clear_zombies_nis_locked(void) -{ - int i; - int islo; - struct lnet_ni *ni; - struct lnet_ni *temp; - - /* - * 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; - list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis_zombie, ni_list) { - int *ref; - int j; - - list_del_init(&ni->ni_list); - cfs_percpt_for_each(ref, j, ni->ni_refs) { - if (!*ref) - 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)); - } - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(HZ); - 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) -{ - struct lnet_ni *ni; - struct lnet_ni *temp; - int i; - - /* NB called holding the global mutex */ - - /* All quiet on the API front */ - LASSERT(!the_lnet.ln_shutdown); - LASSERT(!the_lnet.ln_refcount); - 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 */ - list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis, ni_list) { - lnet_ni_unlink_locked(ni); - } - - /* Drop the cached loopback NI. */ - if (the_lnet.ln_loni) { - 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::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); -} - -/* shutdown down the NI and release refcount */ -static void -lnet_shutdown_lndni(struct lnet_ni *ni) -{ - int i; - - lnet_net_lock(LNET_LOCK_EX); - lnet_ni_unlink_locked(ni); - lnet_net_unlock(LNET_LOCK_EX); - - /* clear messages for this NI on the lazy portal */ - for (i = 0; i < the_lnet.ln_nportals; i++) - lnet_clear_lazy_portal(ni, i, "Shutting down NI"); - - /* Do peer table cleanup for this ni */ - lnet_peer_tables_cleanup(ni); - - lnet_net_lock(LNET_LOCK_EX); - lnet_clear_zombies_nis_locked(); - lnet_net_unlock(LNET_LOCK_EX); -} - -static int -lnet_startup_lndni(struct lnet_ni *ni, struct lnet_ioctl_config_data *conf) -{ - struct lnet_ioctl_config_lnd_tunables *lnd_tunables = NULL; - int rc = -EINVAL; - int lnd_type; - struct lnet_lnd *lnd; - struct lnet_tx_queue *tq; - int i; - u32 seed; - - lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid)); - - LASSERT(libcfs_isknown_lnd(lnd_type)); - - if (lnd_type == CIBLND || lnd_type == OPENIBLND || - lnd_type == IIBLND || lnd_type == VIBLND) { - CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type)); - goto failed0; - } - - /* Make sure this new NI is unique. */ - lnet_net_lock(LNET_LOCK_EX); - rc = lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis); - lnet_net_unlock(LNET_LOCK_EX); - if (!rc) { - if (lnd_type == LOLND) { - lnet_ni_free(ni); - return 0; - } - - CERROR("Net %s is not unique\n", - libcfs_net2str(LNET_NIDNET(ni->ni_nid))); - rc = -EEXIST; - goto failed0; - } - - mutex_lock(&the_lnet.ln_lnd_mutex); - lnd = lnet_find_lnd_by_type(lnd_type); - - if (!lnd) { - mutex_unlock(&the_lnet.ln_lnd_mutex); - rc = request_module("%s", libcfs_lnd2modname(lnd_type)); - mutex_lock(&the_lnet.ln_lnd_mutex); - - lnd = lnet_find_lnd_by_type(lnd_type); - if (!lnd) { - 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); - rc = -EINVAL; - goto failed0; - } - } - - lnet_net_lock(LNET_LOCK_EX); - lnd->lnd_refcount++; - lnet_net_unlock(LNET_LOCK_EX); - - ni->ni_lnd = lnd; - - if (conf && conf->cfg_hdr.ioc_len > sizeof(*conf)) - lnd_tunables = (struct lnet_ioctl_config_lnd_tunables *)conf->cfg_bulk; - - if (lnd_tunables) { - ni->ni_lnd_tunables = kzalloc(sizeof(*ni->ni_lnd_tunables), - GFP_NOFS); - if (!ni->ni_lnd_tunables) { - mutex_unlock(&the_lnet.ln_lnd_mutex); - rc = -ENOMEM; - goto failed0; - } - memcpy(ni->ni_lnd_tunables, lnd_tunables, - sizeof(*ni->ni_lnd_tunables)); - } - - /* - * If given some LND tunable parameters, parse those now to - * override the values in the NI structure. - */ - if (conf) { - if (conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0) - ni->ni_peerrtrcredits = - conf->cfg_config_u.cfg_net.net_peer_rtr_credits; - if (conf->cfg_config_u.cfg_net.net_peer_timeout >= 0) - ni->ni_peertimeout = - conf->cfg_config_u.cfg_net.net_peer_timeout; - if (conf->cfg_config_u.cfg_net.net_peer_tx_credits != -1) - ni->ni_peertxcredits = - conf->cfg_config_u.cfg_net.net_peer_tx_credits; - if (conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0) - ni->ni_maxtxcredits = - conf->cfg_config_u.cfg_net.net_max_tx_credits; - } - - rc = lnd->lnd_startup(ni); - - mutex_unlock(&the_lnet.ln_lnd_mutex); - - if (rc) { - 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 failed0; - } - - LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query); - - 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) { - lnet_ni_addref_locked(ni, 0); - list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt); - } - - lnet_net_unlock(LNET_LOCK_EX); - - if (lnd->lnd_type == LOLND) { - lnet_ni_addref(ni); - LASSERT(!the_lnet.ln_loni); - the_lnet.ln_loni = ni; - return 0; - } - - if (!ni->ni_peertxcredits || !ni->ni_maxtxcredits) { - LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n", - libcfs_lnd2str(lnd->lnd_type), - !ni->ni_peertxcredits ? - "" : "per-peer "); - /* - * shutdown the NI since if we get here then it must've already - * been started - */ - lnet_shutdown_lndni(ni); - return -EINVAL; - } - - 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); - } - - /* Nodes with small feet have little entropy. The NID for this - * node gives the most entropy in the low bits. - */ - seed = LNET_NIDADDR(ni->ni_nid); - add_device_randomness(&seed, sizeof(seed)); - - 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; -failed0: - lnet_ni_free(ni); - return rc; -} - -static int -lnet_startup_lndnis(struct list_head *nilist) -{ - struct lnet_ni *ni; - int rc; - int ni_count = 0; - - while (!list_empty(nilist)) { - ni = list_entry(nilist->next, struct lnet_ni, ni_list); - list_del(&ni->ni_list); - rc = lnet_startup_lndni(ni, NULL); - - if (rc < 0) - goto failed; - - ni_count++; - } - - return ni_count; -failed: - lnet_shutdown_lndnis(); - - return rc; -} - -/** - * Initialize LNet library. - * - * Automatically called at module loading time. Caller has to call - * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the - * latter returned 0. It must be called exactly once. - * - * \retval 0 on success - * \retval -ve on failures. - */ -int lnet_lib_init(void) -{ - int rc; - - lnet_assert_wire_constants(); - - memset(&the_lnet, 0, sizeof(the_lnet)); - - /* refer to global cfs_cpt_tab for now */ - the_lnet.ln_cpt_table = cfs_cpt_tab; - the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab); - - 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 -E2BIG; - } - - while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number) - the_lnet.ln_cpt_bits++; - - rc = lnet_create_locks(); - if (rc) { - CERROR("Can't create LNet global locks: %d\n", rc); - return rc; - } - - the_lnet.ln_refcount = 0; - LNetInvalidateEQHandle(&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); - - /* - * 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. - */ - lnet_register_lnd(&the_lolnd); - return 0; -} - -/** - * Finalize LNet library. - * - * \pre lnet_lib_init() called with success. - * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls. - */ -void lnet_lib_exit(void) -{ - LASSERT(!the_lnet.ln_refcount); - - while (!list_empty(&the_lnet.ln_lnds)) - lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next, - struct lnet_lnd, lnd_list)); - lnet_destroy_locks(); -} - -/** - * Set LNet PID and start LNet interfaces, routing, and forwarding. - * - * 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; - struct lnet_ping_info *pinfo; - struct lnet_handle_md md_handle; - struct list_head net_head; - - INIT_LIST_HEAD(&net_head); - - mutex_lock(&the_lnet.ln_api_mutex); - - CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount); - - if (the_lnet.ln_refcount > 0) { - rc = the_lnet.ln_refcount++; - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - } - - rc = lnet_prepare(requested_pid); - if (rc) { - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - } - - /* Add in the loopback network */ - if (!lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head)) { - rc = -ENOMEM; - goto err_empty_list; - } - - /* - * If LNet is being initialized via DLC it is possible - * that the user requests not to load module parameters (ones which - * are supported by DLC) on initialization. Therefore, make sure not - * to load networks, routes and forwarding from module parameters - * in this case. On cleanup in case of failure only clean up - * routes if it has been loaded - */ - if (!the_lnet.ln_nis_from_mod_params) { - rc = lnet_parse_networks(&net_head, lnet_get_networks()); - if (rc < 0) - goto err_empty_list; - } - - ni_count = lnet_startup_lndnis(&net_head); - if (ni_count < 0) { - rc = ni_count; - goto err_empty_list; - } - - if (!the_lnet.ln_nis_from_mod_params) { - rc = lnet_parse_routes(lnet_get_routes(), &im_a_router); - if (rc) - goto err_shutdown_lndnis; - - rc = lnet_check_routes(); - if (rc) - goto err_destroy_routes; - - rc = lnet_rtrpools_alloc(im_a_router); - if (rc) - goto err_destroy_routes; - } - - rc = lnet_acceptor_start(); - if (rc) - goto err_destroy_routes; - - 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) - goto err_acceptor_stop; - - lnet_ping_target_update(pinfo, md_handle); - - rc = lnet_router_checker_start(); - if (rc) - goto err_stop_ping; - - lnet_fault_init(); - lnet_router_debugfs_init(); - - mutex_unlock(&the_lnet.ln_api_mutex); - - return 0; - -err_stop_ping: - lnet_ping_target_fini(); -err_acceptor_stop: - the_lnet.ln_refcount = 0; - lnet_acceptor_stop(); -err_destroy_routes: - if (!the_lnet.ln_nis_from_mod_params) - lnet_destroy_routes(); -err_shutdown_lndnis: - lnet_shutdown_lndnis(); -err_empty_list: - lnet_unprepare(); - LASSERT(rc < 0); - mutex_unlock(&the_lnet.ln_api_mutex); - while (!list_empty(&net_head)) { - struct lnet_ni *ni; - - 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(void) -{ - mutex_lock(&the_lnet.ln_api_mutex); - - 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_router_debugfs_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(); - } - - 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] config NI configuration - */ -static void -lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_data *config) -{ - struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL; - struct lnet_ioctl_net_config *net_config; - size_t min_size, tunable_size = 0; - int i; - - if (!ni || !config) - return; - - net_config = (struct lnet_ioctl_net_config *)config->cfg_bulk; - if (!net_config) - return; - - BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) != - ARRAY_SIZE(net_config->ni_interfaces)); - - for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) { - if (!ni->ni_interfaces[i]) - break; - - strncpy(net_config->ni_interfaces[i], - ni->ni_interfaces[i], - sizeof(net_config->ni_interfaces[i])); - } - - config->cfg_nid = ni->ni_nid; - config->cfg_config_u.cfg_net.net_peer_timeout = ni->ni_peertimeout; - config->cfg_config_u.cfg_net.net_max_tx_credits = ni->ni_maxtxcredits; - config->cfg_config_u.cfg_net.net_peer_tx_credits = ni->ni_peertxcredits; - config->cfg_config_u.cfg_net.net_peer_rtr_credits = ni->ni_peerrtrcredits; - - net_config->ni_status = ni->ni_status->ns_status; - - if (ni->ni_cpts) { - int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT); - - for (i = 0; i < num_cpts; i++) - net_config->ni_cpts[i] = ni->ni_cpts[i]; - - config->cfg_ncpts = num_cpts; - } - - /* - * See if user land tools sent in a newer and larger version - * of struct lnet_tunables than what the kernel uses. - */ - min_size = sizeof(*config) + sizeof(*net_config); - - if (config->cfg_hdr.ioc_len > min_size) - tunable_size = config->cfg_hdr.ioc_len - min_size; - - /* Don't copy to much data to user space */ - min_size = min(tunable_size, sizeof(*ni->ni_lnd_tunables)); - lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk; - - if (ni->ni_lnd_tunables && lnd_cfg && min_size) { - memcpy(lnd_cfg, ni->ni_lnd_tunables, min_size); - config->cfg_config_u.cfg_net.net_interface_count = 1; - - /* Tell user land that kernel side has less data */ - if (tunable_size > sizeof(*ni->ni_lnd_tunables)) { - min_size = tunable_size - sizeof(ni->ni_lnd_tunables); - config->cfg_hdr.ioc_len -= min_size; - } - } -} - -static int -lnet_get_net_config(struct lnet_ioctl_config_data *config) -{ - struct lnet_ni *ni; - struct list_head *tmp; - int idx = config->cfg_count; - int cpt, i = 0; - int rc = -ENOENT; - - cpt = lnet_net_lock_current(); - - list_for_each(tmp, &the_lnet.ln_nis) { - if (i++ != idx) - continue; - - ni = list_entry(tmp, struct lnet_ni, ni_list); - lnet_ni_lock(ni); - lnet_fill_ni_info(ni, config); - lnet_ni_unlock(ni); - rc = 0; - break; - } - - lnet_net_unlock(cpt); - return rc; -} - -int -lnet_dyn_add_ni(lnet_pid_t requested_pid, struct lnet_ioctl_config_data *conf) -{ - char *nets = conf->cfg_config_u.cfg_net.net_intf; - struct lnet_ping_info *pinfo; - struct lnet_handle_md md_handle; - struct lnet_ni *ni; - struct list_head net_head; - struct lnet_remotenet *rnet; - 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 ? -EINVAL : rc; - - mutex_lock(&the_lnet.ln_api_mutex); - - if (rc > 1) { - rc = -EINVAL; /* only add one interface per call */ - goto failed0; - } - - ni = list_entry(net_head.next, struct lnet_ni, ni_list); - - lnet_net_lock(LNET_LOCK_EX); - rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid)); - lnet_net_unlock(LNET_LOCK_EX); - /* - * make sure that the net added doesn't invalidate the current - * configuration LNet is keeping - */ - if (rnet) { - CERROR("Adding net %s will invalidate routing configuration\n", - nets); - rc = -EUSERS; - goto failed0; - } - - rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(), - false); - if (rc) - goto failed0; - - list_del_init(&ni->ni_list); - - rc = lnet_startup_lndni(ni, conf); - if (rc) - goto failed1; - - if (ni->ni_lnd->lnd_accept) { - rc = lnet_acceptor_start(); - if (rc < 0) { - /* shutdown the ni that we just started */ - CERROR("Failed to start up acceptor thread\n"); - lnet_shutdown_lndni(ni); - goto failed1; - } - } - - lnet_ping_target_update(pinfo, md_handle); - mutex_unlock(&the_lnet.ln_api_mutex); - - return 0; - -failed1: - lnet_ping_md_unlink(pinfo, &md_handle); - lnet_ping_info_free(pinfo); -failed0: - 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) -{ - struct lnet_ni *ni; - struct lnet_ping_info *pinfo; - struct lnet_handle_md md_handle; - int rc; - - /* don't allow userspace to shutdown the LOLND */ - if (LNET_NETTYP(net) == LOLND) - return -EINVAL; - - mutex_lock(&the_lnet.ln_api_mutex); - /* create and link a new ping info, before removing the old one */ - rc = lnet_ping_info_setup(&pinfo, &md_handle, - lnet_get_ni_count() - 1, false); - if (rc) - goto out; - - ni = lnet_net2ni(net); - if (!ni) { - rc = -EINVAL; - goto failed; - } - - /* decrement the reference counter taken by lnet_net2ni() */ - lnet_ni_decref_locked(ni, 0); - - lnet_shutdown_lndni(ni); - - if (!lnet_count_acceptor_nis()) - lnet_acceptor_stop(); - - lnet_ping_target_update(pinfo, md_handle); - goto out; -failed: - lnet_ping_md_unlink(pinfo, &md_handle); - lnet_ping_info_free(pinfo); -out: - mutex_unlock(&the_lnet.ln_api_mutex); - - return rc; -} - -/** - * LNet ioctl handler. - * - */ -int -LNetCtl(unsigned int cmd, void *arg) -{ - struct libcfs_ioctl_data *data = arg; - struct lnet_ioctl_config_data *config; - struct lnet_process_id id = {0}; - struct lnet_ni *ni; - int rc; - unsigned long secs_passed; - - BUILD_BUG_ON(LIBCFS_IOC_DATA_MAX < - sizeof(struct lnet_ioctl_net_config) + - sizeof(struct lnet_ioctl_config_data)); - - 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; - - if (config->cfg_hdr.ioc_len < sizeof(*config)) - return -EINVAL; - - 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); - if (!rc) { - rc = lnet_check_routes(); - if (rc) - lnet_del_route(config->cfg_net, - config->cfg_nid); - } - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - - case IOC_LIBCFS_DEL_ROUTE: - config = arg; - - if (config->cfg_hdr.ioc_len < sizeof(*config)) - return -EINVAL; - - mutex_lock(&the_lnet.ln_api_mutex); - rc = lnet_del_route(config->cfg_net, config->cfg_nid); - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - - case IOC_LIBCFS_GET_ROUTE: - config = arg; - - if (config->cfg_hdr.ioc_len < sizeof(*config)) - return -EINVAL; - - 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: { - size_t total = sizeof(*config) + - sizeof(struct lnet_ioctl_net_config); - config = arg; - - if (config->cfg_hdr.ioc_len < total) - return -EINVAL; - - return lnet_get_net_config(config); - } - - case IOC_LIBCFS_GET_LNET_STATS: { - struct lnet_ioctl_lnet_stats *lnet_stats = arg; - - if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats)) - return -EINVAL; - - lnet_counters_get(&lnet_stats->st_cntrs); - return 0; - } - - case IOC_LIBCFS_CONFIG_RTR: - config = arg; - - if (config->cfg_hdr.ioc_len < sizeof(*config)) - return -EINVAL; - - mutex_lock(&the_lnet.ln_api_mutex); - if (config->cfg_config_u.cfg_buffers.buf_enable) { - rc = lnet_rtrpools_enable(); - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - } - lnet_rtrpools_disable(); - mutex_unlock(&the_lnet.ln_api_mutex); - return 0; - - case IOC_LIBCFS_ADD_BUF: - config = arg; - - if (config->cfg_hdr.ioc_len < sizeof(*config)) - return -EINVAL; - - 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); - mutex_unlock(&the_lnet.ln_api_mutex); - return rc; - - case IOC_LIBCFS_GET_BUF: { - struct lnet_ioctl_pool_cfg *pool_cfg; - size_t total = sizeof(*config) + sizeof(*pool_cfg); - - config = arg; - - if (config->cfg_hdr.ioc_len < total) - return -EINVAL; - - 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; - - if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info)) - return -EINVAL; - - 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: - secs_passed = (ktime_get_real_seconds() - data->ioc_u64[0]); - secs_passed *= msecs_to_jiffies(MSEC_PER_SEC); - - return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, - jiffies - secs_passed); - - 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 */ - data->ioc_pbuf1, - data->ioc_plen1 / sizeof(struct lnet_process_id)); - if (rc < 0) - return rc; - data->ioc_count = rc; - return 0; - - default: - ni = lnet_net2ni(data->ioc_net); - if (!ni) - return -EINVAL; - - if (!ni->ni_lnd->lnd_ctl) - rc = -EINVAL; - else - rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg); - - lnet_ni_decref(ni); - return rc; - } - /* not reached */ -} -EXPORT_SYMBOL(LNetCtl); - -void LNetDebugPeer(struct lnet_process_id id) -{ - lnet_debug_peer(id.nid); -} -EXPORT_SYMBOL(LNetDebugPeer); - -/** - * Retrieve the lnet_process_id 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 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, struct lnet_process_id *id) -{ - struct lnet_ni *ni; - struct list_head *tmp; - int cpt; - int rc = -ENOENT; - - LASSERT(the_lnet.ln_refcount > 0); - - cpt = lnet_net_lock_current(); - - list_for_each(tmp, &the_lnet.ln_nis) { - if (index--) - continue; - - ni = list_entry(tmp, struct lnet_ni, 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); - -static int lnet_ping(struct lnet_process_id id, int timeout_ms, - struct lnet_process_id __user *ids, int n_ids) -{ - struct lnet_handle_eq eqh; - struct lnet_handle_md mdh; - struct lnet_event event; - struct lnet_md md = { NULL }; - int which; - int unlinked = 0; - int replied = 0; - const int a_long_time = 60000; /* mS */ - int infosz; - struct lnet_ping_info *info; - struct lnet_process_id tmpid; - int i; - int nob; - int rc; - int rc2; - - infosz = offsetof(struct lnet_ping_info, 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; - - info = kzalloc(infosz, GFP_KERNEL); - if (!info) - return -ENOMEM; - - /* NB 2 events max (including any unlink event) */ - rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh); - if (rc) { - 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) { - 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) { - /* Don't CERROR; this could be deliberate! */ - - rc2 = LNetMDUnlink(mdh); - LASSERT(!rc2); - - /* NB must wait for the UNLINK event below... */ - unlinked = 1; - timeout_ms = a_long_time; - } - - do { - /* MUST block for unlink to complete */ - - rc2 = LNetEQPoll(&eqh, 1, timeout_ms, !unlinked, - &event, &which); - - 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) { - /* timeout or error */ - if (!replied && !rc) - rc = (rc2 < 0) ? rc2 : - !rc2 ? -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) { - /* 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)) { - CERROR("%s: ping w/o NI status: 0x%x\n", - libcfs_id2str(id), info->pi_features); - goto out_1; - } - - if (nob < offsetof(struct lnet_ping_info, pi_ni[0])) { - CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id), - nob, (int)offsetof(struct lnet_ping_info, pi_ni[0])); - goto out_1; - } - - if (info->pi_nnis < n_ids) - n_ids = info->pi_nnis; - - if (nob < offsetof(struct lnet_ping_info, pi_ni[n_ids])) { - CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id), - nob, (int)offsetof(struct lnet_ping_info, pi_ni[n_ids])); - goto out_1; - } - - rc = -EFAULT; /* If I SEGV... */ - - memset(&tmpid, 0, sizeof(tmpid)); - 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) - CERROR("rc2 %d\n", rc2); - LASSERT(!rc2); - - out_0: - kfree(info); - return rc; -} |