/* * 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, Whamcloud, Inc. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #define DEBUG_SUBSYSTEM S_LNET #include #ifdef __KERNEL__ #define D_LNI D_CONSOLE #else #define D_LNI D_CONFIG #endif lnet_t the_lnet; /* THE state of the network */ #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"); char * lnet_get_routes(void) { return routes; } 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"; } void lnet_init_locks(void) { cfs_spin_lock_init (&the_lnet.ln_lock); cfs_waitq_init(&the_lnet.ln_eq_waitq); cfs_mutex_init(&the_lnet.ln_lnd_mutex); cfs_mutex_init(&the_lnet.ln_api_mutex); } void lnet_fini_locks(void) { } #else char * lnet_get_routes(void) { char *str = getenv("LNET_ROUTES"); return (str == NULL) ? "" : str; } char * lnet_get_networks (void) { static char default_networks[256]; char *networks = getenv ("LNET_NETWORKS"); char *ip2nets = getenv ("LNET_IP2NETS"); char *str; char *sep; int len; int nob; int rc; cfs_list_t *tmp; #ifdef NOT_YET if (networks != NULL && ip2nets != NULL) { LCONSOLE_ERROR_MSG(0x103, "Please set EITHER 'LNET_NETWORKS' or" " 'LNET_IP2NETS' but not both at once\n"); return NULL; } if (ip2nets != NULL) { rc = lnet_parse_ip2nets(&networks, ip2nets); return (rc == 0) ? networks : NULL; } #else SET_BUT_UNUSED(ip2nets); SET_BUT_UNUSED(rc); #endif 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 = ""; cfs_list_for_each (tmp, &the_lnet.ln_lnds) { lnd_t *lnd = cfs_list_entry(tmp, lnd_t, lnd_list); nob = snprintf(str, len, "%s%s", sep, libcfs_lnd2str(lnd->lnd_type)); len -= nob; if (len < 0) { /* overflowed the string; leave it where it was */ *str = 0; break; } str += nob; sep = ","; } return default_networks; } # ifndef HAVE_LIBPTHREAD void lnet_init_locks(void) { the_lnet.ln_lock = 0; the_lnet.ln_lnd_mutex = 0; the_lnet.ln_api_mutex = 0; } void lnet_fini_locks(void) { LASSERT (the_lnet.ln_api_mutex == 0); LASSERT (the_lnet.ln_lnd_mutex == 0); LASSERT (the_lnet.ln_lock == 0); } # else void lnet_init_locks(void) { pthread_cond_init(&the_lnet.ln_eq_cond, NULL); pthread_mutex_init(&the_lnet.ln_lock, NULL); pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL); pthread_mutex_init(&the_lnet.ln_api_mutex, NULL); } 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_lock); pthread_cond_destroy(&the_lnet.ln_eq_cond); } # endif #endif 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); } lnd_t * lnet_find_lnd_by_type (int type) { lnd_t *lnd; cfs_list_t *tmp; /* holding lnd mutex */ cfs_list_for_each (tmp, &the_lnet.ln_lnds) { lnd = cfs_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); cfs_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); } 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); cfs_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); } #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); CFS_INIT_LIST_HEAD (&fl->fl_list); fl->fl_objs = space; fl->fl_nobjs = n; fl->fl_objsize = size; do { memset (space, 0, size); cfs_list_add ((cfs_list_t *)space, &fl->fl_list); space += size; } while (--n != 0); return (0); } void lnet_freelist_fini (lnet_freelist_t *fl) { cfs_list_t *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 */ __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 cfs_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"; } } void lnet_res_container_cleanup(struct lnet_res_container *rec) { int count = 0; if (rec->rec_type == 0) /* not set yet, it's a uninitialized */ return; while (!cfs_list_empty(&rec->rec_active)) { cfs_list_t *e = rec->rec_active.next; cfs_list_del_init(e); if (rec->rec_type == LNET_COOKIE_TYPE_EQ) { lnet_eq_free(cfs_list_entry(e, lnet_eq_t, eq_list)); } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) { lnet_md_free(cfs_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 */ } int lnet_res_container_setup(struct lnet_res_container *rec, int type, int objnum, int objsz) { int rc = 0; int i; LASSERT(rec->rec_type == 0); rec->rec_type = type; CFS_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 = type; /* Arbitrary choice of hash table size */ LIBCFS_ALLOC(rec->rec_lh_hash, 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++) CFS_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; } lnet_libhandle_t * lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie) { /* ALWAYS called with lnet_res_lock held */ cfs_list_t *head; lnet_libhandle_t *lh; unsigned int hash; if ((cookie & (LNET_COOKIE_TYPES - 1)) != rec->rec_type) return NULL; hash = cookie >> LNET_COOKIE_TYPE_BITS; head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK]; cfs_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; 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; cfs_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 int lnet_prepare(lnet_pid_t requested_pid) { /* Prepare to bring up the network */ int rc = 0; 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 (cfs_curproc_uid())/* 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 memset(&the_lnet.ln_counters, 0, sizeof(the_lnet.ln_counters)); CFS_INIT_LIST_HEAD (&the_lnet.ln_test_peers); CFS_INIT_LIST_HEAD (&the_lnet.ln_nis); CFS_INIT_LIST_HEAD (&the_lnet.ln_zombie_nis); CFS_INIT_LIST_HEAD (&the_lnet.ln_remote_nets); CFS_INIT_LIST_HEAD (&the_lnet.ln_routers); the_lnet.ln_interface_cookie = lnet_create_interface_cookie(); lnet_init_rtrpools(); rc = lnet_peer_table_create(); if (rc != 0) goto failed0; /* NB: we will have instance of message container per CPT soon */ rc = lnet_msg_container_setup(&the_lnet.ln_msg_container); if (rc != 0) goto failed1; rc = lnet_res_container_setup(&the_lnet.ln_eq_container, LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS, sizeof(lnet_eq_t)); if (rc != 0) { CERROR("Failed to create EQ container for LNet: %d\n", rc); goto failed2; } /* NB: we will have instance of ME container per CPT soon */ rc = lnet_res_container_setup(&the_lnet.ln_me_container, LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES, sizeof(lnet_me_t)); if (rc != 0) { CERROR("Failed to create ME container for LNet: %d\n", rc); goto failed3; } /* NB: we will have instance of MD container per CPT soon */ rc = lnet_res_container_setup(&the_lnet.ln_md_container, LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS, sizeof(lnet_libmd_t)); if (rc != 0) { CERROR("Failed to create MD container for LNet: %d\n", rc); goto failed3; } rc = lnet_portals_create(); if (rc != 0) { CERROR("Failed to create portals for LNet: %d\n", rc); goto failed3; } return 0; failed3: /* NB: lnet_res_container_cleanup is safe to call for * uninitialized container */ lnet_res_container_cleanup(&the_lnet.ln_md_container); lnet_res_container_cleanup(&the_lnet.ln_me_container); lnet_res_container_cleanup(&the_lnet.ln_eq_container); failed2: lnet_msg_container_cleanup(&the_lnet.ln_msg_container); failed1: lnet_peer_table_destroy(); failed0: return rc; } 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 (cfs_list_empty(&the_lnet.ln_test_peers)); LASSERT (the_lnet.ln_refcount == 0); LASSERT (cfs_list_empty(&the_lnet.ln_nis)); LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis)); LASSERT (the_lnet.ln_nzombie_nis == 0); lnet_portals_destroy(); lnet_res_container_cleanup(&the_lnet.ln_md_container); lnet_res_container_cleanup(&the_lnet.ln_me_container); lnet_res_container_cleanup(&the_lnet.ln_eq_container); lnet_free_rtrpools(); lnet_msg_container_cleanup(&the_lnet.ln_msg_container); lnet_peer_table_destroy(); return 0; } lnet_ni_t * lnet_net2ni_locked (__u32 net) { cfs_list_t *tmp; lnet_ni_t *ni; cfs_list_for_each (tmp, &the_lnet.ln_nis) { ni = cfs_list_entry(tmp, lnet_ni_t, ni_list); if (LNET_NIDNET(ni->ni_nid) == net) { lnet_ni_addref_locked(ni); return ni; } } return NULL; } int lnet_islocalnet (__u32 net) { lnet_ni_t *ni; LNET_LOCK(); ni = lnet_net2ni_locked(net); if (ni != NULL) lnet_ni_decref_locked(ni); LNET_UNLOCK(); return ni != NULL; } lnet_ni_t * lnet_nid2ni_locked (lnet_nid_t nid) { cfs_list_t *tmp; lnet_ni_t *ni; cfs_list_for_each (tmp, &the_lnet.ln_nis) { ni = cfs_list_entry(tmp, lnet_ni_t, ni_list); if (ni->ni_nid == nid) { lnet_ni_addref_locked(ni); return ni; } } return NULL; } int lnet_islocalnid (lnet_nid_t nid) { lnet_ni_t *ni; LNET_LOCK(); ni = lnet_nid2ni_locked(nid); if (ni != NULL) lnet_ni_decref_locked(ni); LNET_UNLOCK(); 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) cfs_list_t *tmp; lnet_ni_t *ni; LNET_LOCK(); cfs_list_for_each (tmp, &the_lnet.ln_nis) { ni = cfs_list_entry(tmp, lnet_ni_t, ni_list); if (ni->ni_lnd->lnd_accept != NULL) count++; } LNET_UNLOCK(); #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */ return count; } void lnet_shutdown_lndnis (void) { int i; int islo; 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 (cfs_list_empty(&the_lnet.ln_zombie_nis)); LASSERT (the_lnet.ln_nzombie_nis == 0); LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets)); LNET_LOCK(); the_lnet.ln_shutdown = 1; /* flag shutdown */ /* Unlink NIs from the global table */ while (!cfs_list_empty(&the_lnet.ln_nis)) { ni = cfs_list_entry(the_lnet.ln_nis.next, lnet_ni_t, ni_list); cfs_list_del (&ni->ni_list); the_lnet.ln_nzombie_nis++; lnet_ni_decref_locked(ni); /* drop ln_nis' ref */ } /* Drop the cached eqwait NI. */ if (the_lnet.ln_eq_waitni != NULL) { lnet_ni_decref_locked(the_lnet.ln_eq_waitni); 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); the_lnet.ln_loni = NULL; } LNET_UNLOCK(); /* 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_table_cleanup(); LNET_LOCK(); /* 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 (the_lnet.ln_nzombie_nis != 0) { while (cfs_list_empty(&the_lnet.ln_zombie_nis)) { LNET_UNLOCK(); ++i; if ((i & (-i)) == i) CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n", the_lnet.ln_nzombie_nis); cfs_pause(cfs_time_seconds(1)); LNET_LOCK(); } ni = cfs_list_entry(the_lnet.ln_zombie_nis.next, lnet_ni_t, ni_list); cfs_list_del(&ni->ni_list); ni->ni_lnd->lnd_refcount--; LNET_UNLOCK(); islo = ni->ni_lnd->lnd_type == LOLND; LASSERT (!cfs_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)); LIBCFS_FREE(ni, sizeof(*ni)); LNET_LOCK(); the_lnet.ln_nzombie_nis--; } the_lnet.ln_shutdown = 0; LNET_UNLOCK(); if (the_lnet.ln_network_tokens != NULL) { LIBCFS_FREE(the_lnet.ln_network_tokens, the_lnet.ln_network_tokens_nob); the_lnet.ln_network_tokens = NULL; } } int lnet_startup_lndnis (void) { lnd_t *lnd; lnet_ni_t *ni; cfs_list_t nilist; int rc = 0; int lnd_type; int nicount = 0; char *nets = lnet_get_networks(); CFS_INIT_LIST_HEAD(&nilist); if (nets == NULL) goto failed; rc = lnet_parse_networks(&nilist, nets); if (rc != 0) goto failed; while (!cfs_list_empty(&nilist)) { ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list); 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 failed; } 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 = cfs_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 ni->ni_refcount = 1; LNET_LOCK(); lnd->lnd_refcount++; LNET_UNLOCK(); 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_LOCK(); lnd->lnd_refcount--; LNET_UNLOCK(); goto failed; } LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL); cfs_list_del(&ni->ni_list); LNET_LOCK(); cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis); LNET_UNLOCK(); 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; } ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits; CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n", libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits, ni->ni_txcredits, ni->ni_peerrtrcredits, ni->ni_peertimeout); nicount++; } if (the_lnet.ln_eq_waitni != NULL && nicount > 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 failed; } return 0; failed: lnet_shutdown_lndnis(); while (!cfs_list_empty(&nilist)) { ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list); cfs_list_del(&ni->ni_list); LIBCFS_FREE(ni, sizeof(*ni)); } return -ENETDOWN; } /** * 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) { lnet_assert_wire_constants (); LASSERT (!the_lnet.ln_init); memset(&the_lnet, 0, sizeof(the_lnet)); lnet_init_locks(); the_lnet.ln_refcount = 0; the_lnet.ln_init = 1; LNetInvalidateHandle(&the_lnet.ln_rc_eqh); CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds); CFS_INIT_LIST_HEAD(&the_lnet.ln_zombie_rcd); #ifdef __KERNEL__ /* 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 /* Register LNDs * NB the order here determines default 'networks=' order */ # ifdef CRAY_XT3 LNET_REGISTER_ULND(the_ptllnd); # endif # ifdef HAVE_LIBPTHREAD LNET_REGISTER_ULND(the_tcplnd); # endif #endif lnet_register_lnd(&the_lolnd); return 0; } /** * 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 (!cfs_list_empty(&the_lnet.ln_lnds)) lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next, lnd_t, lnd_list)); lnet_fini_locks(); the_lnet.ln_init = 0; } /** * 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; 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++; goto out; } lnet_get_tunables(); if (requested_pid == LNET_PID_ANY) { /* Don't instantiate LNET just for me */ rc = -ENETDOWN; goto failed0; } rc = lnet_prepare(requested_pid); if (rc != 0) goto failed0; rc = lnet_startup_lndnis(); if (rc != 0) goto failed1; 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_alloc_rtrpools(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... */ /* NB router checker needs the_lnet.ln_ping_info in * lnet_router_checker -> lnet_update_ni_status */ rc = lnet_ping_target_init(); if (rc != 0) goto failed3; rc = lnet_router_checker_start(); if (rc != 0) goto failed4; lnet_proc_init(); goto out; failed4: lnet_ping_target_fini(); failed3: the_lnet.ln_refcount = 0; lnet_acceptor_stop(); failed2: lnet_destroy_routes(); lnet_shutdown_lndnis(); failed1: lnet_unprepare(); failed0: LASSERT (rc < 0); out: LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex); return rc; } /** * Stop LNet interfaces, routing, and forwarding. * * Users must call this function once for each successful call to LNetNIInit(). * Once the LNetNIFini() operation has been started, the results of pending * API operations are undefined. * * \return always 0 for current implementation. */ int LNetNIFini() { LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex); LASSERT (the_lnet.ln_init); LASSERT (the_lnet.ln_refcount > 0); if (the_lnet.ln_refcount != 1) { the_lnet.ln_refcount--; } else { LASSERT (!the_lnet.ln_niinit_self); lnet_proc_fini(); lnet_router_checker_stop(); lnet_ping_target_fini(); /* Teardown fns that use my own API functions BEFORE here */ the_lnet.ln_refcount = 0; lnet_acceptor_stop(); lnet_destroy_routes(); lnet_shutdown_lndnis(); lnet_unprepare(); } LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex); return 0; } /** * 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; lnet_process_id_t id = {0}; lnet_ni_t *ni; int rc; LASSERT (the_lnet.ln_init); LASSERT (the_lnet.ln_refcount > 0); 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: rc = lnet_add_route(data->ioc_net, data->ioc_count, data->ioc_nid); return (rc != 0) ? rc : lnet_check_routes(); case IOC_LIBCFS_DEL_ROUTE: return lnet_del_route(data->ioc_net, data->ioc_nid); case IOC_LIBCFS_GET_ROUTE: return lnet_get_route(data->ioc_count, &data->ioc_net, &data->ioc_count, &data->ioc_nid, &data->ioc_flags); 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_LOCK(); the_lnet.ln_testprotocompat = data->ioc_flags; LNET_UNLOCK(); return 0; case IOC_LIBCFS_PING: id.nid = data->ioc_nid; id.pid = data->ioc_u32[0]; rc = lnet_ping(id, data->ioc_u32[1], /* timeout */ (lnet_process_id_t *)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 */ } /** * 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) { lnet_ni_t *ni; cfs_list_t *tmp; int rc = -ENOENT; LASSERT (the_lnet.ln_init); LASSERT (the_lnet.ln_refcount > 0); LNET_LOCK(); cfs_list_for_each(tmp, &the_lnet.ln_nis) { if (index-- != 0) continue; ni = cfs_list_entry(tmp, lnet_ni_t, ni_list); id->nid = ni->ni_nid; id->pid = the_lnet.ln_pid; rc = 0; break; } LNET_UNLOCK(); return rc; } /** * 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); } static int lnet_create_ping_info(void) { int i; int n; int rc; unsigned int infosz; lnet_ni_t *ni; lnet_process_id_t id; lnet_ping_info_t *pinfo; for (n = 0; ; n++) { rc = LNetGetId(n, &id); if (rc == -ENOENT) break; LASSERT (rc == 0); } infosz = offsetof(lnet_ping_info_t, pi_ni[n]); LIBCFS_ALLOC(pinfo, infosz); if (pinfo == NULL) { CERROR("Can't allocate ping info[%d]\n", n); return -ENOMEM; } pinfo->pi_nnis = n; pinfo->pi_pid = the_lnet.ln_pid; pinfo->pi_magic = LNET_PROTO_PING_MAGIC; pinfo->pi_version = LNET_PROTO_PING_VERSION; for (i = 0; i < n; i++) { lnet_ni_status_t *ns = &pinfo->pi_ni[i]; rc = LNetGetId(i, &id); LASSERT (rc == 0); ns->ns_nid = id.nid; ns->ns_status = LNET_NI_STATUS_UP; LNET_LOCK(); ni = lnet_nid2ni_locked(id.nid); LASSERT (ni != NULL); LASSERT (ni->ni_status == NULL); ni->ni_status = ns; lnet_ni_decref_locked(ni); LNET_UNLOCK(); } the_lnet.ln_ping_info = pinfo; return 0; } static void lnet_destroy_ping_info(void) { lnet_ni_t *ni; LNET_LOCK(); cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) { ni->ni_status = NULL; } LNET_UNLOCK(); LIBCFS_FREE(the_lnet.ln_ping_info, offsetof(lnet_ping_info_t, pi_ni[the_lnet.ln_ping_info->pi_nnis])); the_lnet.ln_ping_info = NULL; return; } int lnet_ping_target_init(void) { lnet_md_t md = {0}; lnet_handle_me_t meh; lnet_process_id_t id; int rc; int rc2; int infosz; rc = lnet_create_ping_info(); if (rc != 0) return rc; /* We can have a tiny EQ since we only need to see the unlink event on * teardown, which by definition is the last one! */ rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq); if (rc != 0) { CERROR("Can't allocate ping EQ: %d\n", rc); goto failed_0; } memset(&id, 0, sizeof(lnet_process_id_t)); id.nid = LNET_NID_ANY; id.pid = LNET_PID_ANY; rc = LNetMEAttach(LNET_RESERVED_PORTAL, id, LNET_PROTO_PING_MATCHBITS, 0, LNET_UNLINK, LNET_INS_AFTER, &meh); if (rc != 0) { CERROR("Can't create ping ME: %d\n", rc); goto failed_1; } /* initialize md content */ infosz = offsetof(lnet_ping_info_t, pi_ni[the_lnet.ln_ping_info->pi_nnis]); md.start = the_lnet.ln_ping_info; md.length = infosz; 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; rc = LNetMDAttach(meh, md, LNET_RETAIN, &the_lnet.ln_ping_target_md); if (rc != 0) { CERROR("Can't attach ping MD: %d\n", rc); goto failed_2; } return 0; failed_2: rc2 = LNetMEUnlink(meh); LASSERT (rc2 == 0); failed_1: rc2 = LNetEQFree(the_lnet.ln_ping_target_eq); LASSERT (rc2 == 0); failed_0: lnet_destroy_ping_info(); return rc; } void lnet_ping_target_fini(void) { lnet_event_t event; int rc; int which; int timeout_ms = 1000; cfs_sigset_t blocked = cfs_block_allsigs(); LNetMDUnlink(the_lnet.ln_ping_target_md); /* NB md could be busy; this just starts the unlink */ for (;;) { rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1, timeout_ms, &event, &which); /* I expect overflow... */ LASSERT (rc >= 0 || rc == -EOVERFLOW); if (rc == 0) { /* timed out: provide a diagnostic */ CWARN("Still waiting for ping MD to unlink\n"); timeout_ms *= 2; continue; } /* Got a valid event */ if (event.unlinked) break; } rc = LNetEQFree(the_lnet.ln_ping_target_eq); LASSERT (rc == 0); lnet_destroy_ping_info(); cfs_restore_sigs(blocked); } int lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *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 = offsetof(lnet_ping_info_t, pi_ni[n_ids]); lnet_ping_info_t *info; lnet_process_id_t tmpid; int i; int nob; int rc; int rc2; cfs_sigset_t blocked; 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 = LUSTRE_SRV_LNET_PID; 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_version != LNET_PROTO_PING_VERSION) { CERROR("%s: Unexpected version 0x%x\n", libcfs_id2str(id), info->pi_version); 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; #ifdef __KERNEL__ if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid))) goto out_1; #else ids[i] = tmpid; #endif } 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; }