/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (c) 2001-2003 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.sf.net/projects/lustre/ * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre 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 for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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"); static char *portals_compatibility = "none"; CFS_MODULE_PARM(portals_compatibility, "s", charp, 0444, "wire protocol compatibility: 'strong'|'weak'|'none'"); 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"; } int lnet_get_portals_compatibility(void) { if (!strcmp(portals_compatibility, "none")) { return 0; } if (!strcmp(portals_compatibility, "weak")) { return 1; LCONSOLE_WARN("Starting in weak portals-compatible mode\n"); } if (!strcmp(portals_compatibility, "strong")) { return 2; LCONSOLE_WARN("Starting in strong portals-compatible mode\n"); } LCONSOLE_ERROR_MSG(0x102, "portals_compatibility=\"%s\" not supported\n", portals_compatibility); return -EINVAL; } void lnet_init_locks(void) { spin_lock_init (&the_lnet.ln_lock); cfs_waitq_init (&the_lnet.ln_waitq); init_mutex(&the_lnet.ln_lnd_mutex); init_mutex(&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; struct list_head *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 ip2nets = NULL; rc = 0; #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 = ""; list_for_each (tmp, &the_lnet.ln_lnds) { lnd_t *lnd = list_entry(tmp, lnd_t, lnd_list); nob = snprintf(str, len, "%s%s", sep, libcfs_lnd2str(lnd->lnd_type)); len -= nob; if (len < 0) { /* overflowed the string; leave it where it was */ *str = 0; break; } str += nob; sep = ","; } return default_networks; } int lnet_get_portals_compatibility(void) { return 0; } # 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_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_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; struct list_head *tmp; /* holding lnd mutex */ list_for_each (tmp, &the_lnet.ln_lnds) { lnd = list_entry(tmp, lnd_t, lnd_list); if (lnd->lnd_type == type) return lnd; } return NULL; } void lnet_register_lnd (lnd_t *lnd) { LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex); LASSERT (the_lnet.ln_init); LASSERT (libcfs_isknown_lnd(lnd->lnd_type)); LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == NULL); list_add_tail (&lnd->lnd_list, &the_lnet.ln_lnds); lnd->lnd_refcount = 0; CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type)); LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex); } void lnet_unregister_lnd (lnd_t *lnd) { LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex); LASSERT (the_lnet.ln_init); LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == lnd); LASSERT (lnd->lnd_refcount == 0); list_del (&lnd->lnd_list); CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type)); LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex); } #ifndef LNET_USE_LIB_FREELIST int lnet_descriptor_setup (void) { return 0; } void lnet_descriptor_cleanup (void) { } #else 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); list_add ((struct list_head *)space, &fl->fl_list); space += size; } while (--n != 0); return (0); } void lnet_freelist_fini (lnet_freelist_t *fl) { struct list_head *el; int count; if (fl->fl_nobjs == 0) return; count = 0; for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next) count++; LASSERT (count == fl->fl_nobjs); LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize); memset (fl, 0, sizeof (fl)); } int lnet_descriptor_setup (void) { /* NB on failure caller must still call lnet_descriptor_cleanup */ /* ****** */ int rc; memset (&the_lnet.ln_free_mes, 0, sizeof (the_lnet.ln_free_mes)); memset (&the_lnet.ln_free_msgs, 0, sizeof (the_lnet.ln_free_msgs)); memset (&the_lnet.ln_free_mds, 0, sizeof (the_lnet.ln_free_mds)); memset (&the_lnet.ln_free_eqs, 0, sizeof (the_lnet.ln_free_eqs)); rc = lnet_freelist_init(&the_lnet.ln_free_mes, MAX_MES, sizeof (lnet_me_t)); if (rc != 0) return (rc); rc = lnet_freelist_init(&the_lnet.ln_free_msgs, MAX_MSGS, sizeof (lnet_msg_t)); if (rc != 0) return (rc); rc = lnet_freelist_init(&the_lnet.ln_free_mds, MAX_MDS, sizeof (lnet_libmd_t)); if (rc != 0) return (rc); rc = lnet_freelist_init(&the_lnet.ln_free_eqs, MAX_EQS, sizeof (lnet_eq_t)); return (rc); } void lnet_descriptor_cleanup (void) { lnet_freelist_fini (&the_lnet.ln_free_mes); lnet_freelist_fini (&the_lnet.ln_free_msgs); lnet_freelist_fini (&the_lnet.ln_free_mds); lnet_freelist_fini (&the_lnet.ln_free_eqs); } #endif __u64 lnet_create_interface_cookie (void) { /* NB the interface cookie in wire handles guards against delayed * replies and ACKs appearing valid after reboot. Initialisation time, * even if it's only implemented to millisecond resolution is probably * easily good enough. */ struct timeval tv; __u64 cookie; #ifndef __KERNEL__ int rc = gettimeofday (&tv, NULL); LASSERT (rc == 0); #else do_gettimeofday(&tv); #endif cookie = tv.tv_sec; cookie *= 1000000; cookie += tv.tv_usec; return cookie; } int lnet_setup_handle_hash (void) { int i; /* Arbitrary choice of hash table size */ #ifdef __KERNEL__ the_lnet.ln_lh_hash_size = CFS_PAGE_SIZE / sizeof (struct list_head); #else the_lnet.ln_lh_hash_size = (MAX_MES + MAX_MDS + MAX_EQS)/4; #endif LIBCFS_ALLOC(the_lnet.ln_lh_hash_table, the_lnet.ln_lh_hash_size * sizeof (struct list_head)); if (the_lnet.ln_lh_hash_table == NULL) return (-ENOMEM); for (i = 0; i < the_lnet.ln_lh_hash_size; i++) CFS_INIT_LIST_HEAD (&the_lnet.ln_lh_hash_table[i]); the_lnet.ln_next_object_cookie = LNET_COOKIE_TYPES; return (0); } void lnet_cleanup_handle_hash (void) { if (the_lnet.ln_lh_hash_table == NULL) return; LIBCFS_FREE(the_lnet.ln_lh_hash_table, the_lnet.ln_lh_hash_size * sizeof (struct list_head)); } lnet_libhandle_t * lnet_lookup_cookie (__u64 cookie, int type) { /* ALWAYS called with LNET_LOCK held */ struct list_head *list; struct list_head *el; unsigned int hash; if ((cookie & (LNET_COOKIE_TYPES - 1)) != type) return (NULL); hash = ((unsigned int)cookie) % the_lnet.ln_lh_hash_size; list = &the_lnet.ln_lh_hash_table[hash]; list_for_each (el, list) { lnet_libhandle_t *lh = list_entry (el, lnet_libhandle_t, lh_hash_chain); if (lh->lh_cookie == cookie) return (lh); } return (NULL); } void lnet_initialise_handle (lnet_libhandle_t *lh, int type) { /* ALWAYS called with LNET_LOCK held */ unsigned int hash; LASSERT (type >= 0 && type < LNET_COOKIE_TYPES); lh->lh_cookie = the_lnet.ln_next_object_cookie | type; the_lnet.ln_next_object_cookie += LNET_COOKIE_TYPES; hash = ((unsigned int)lh->lh_cookie) % the_lnet.ln_lh_hash_size; list_add (&lh->lh_hash_chain, &the_lnet.ln_lh_hash_table[hash]); } void lnet_invalidate_handle (lnet_libhandle_t *lh) { /* ALWAYS called with LNET_LOCK held */ list_del (&lh->lh_hash_chain); } int lnet_init_finalizers(void) { #ifdef __KERNEL__ int i; the_lnet.ln_nfinalizers = num_online_cpus(); LIBCFS_ALLOC(the_lnet.ln_finalizers, the_lnet.ln_nfinalizers * sizeof(*the_lnet.ln_finalizers)); if (the_lnet.ln_finalizers == NULL) { CERROR("Can't allocate ln_finalizers\n"); return -ENOMEM; } for (i = 0; i < the_lnet.ln_nfinalizers; i++) the_lnet.ln_finalizers[i] = NULL; #else the_lnet.ln_finalizing = 0; #endif CFS_INIT_LIST_HEAD(&the_lnet.ln_finalizeq); return 0; } void lnet_fini_finalizers(void) { #ifdef __KERNEL__ int i; for (i = 0; i < the_lnet.ln_nfinalizers; i++) LASSERT (the_lnet.ln_finalizers[i] == NULL); LIBCFS_FREE(the_lnet.ln_finalizers, the_lnet.ln_nfinalizers * sizeof(*the_lnet.ln_finalizers)); #else LASSERT (!the_lnet.ln_finalizing); #endif LASSERT (list_empty(&the_lnet.ln_finalizeq)); } #ifndef __KERNEL__ /* 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; int i; 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 rc = lnet_descriptor_setup(); if (rc != 0) goto failed0; memset(&the_lnet.ln_counters, 0, sizeof(the_lnet.ln_counters)); CFS_INIT_LIST_HEAD (&the_lnet.ln_active_msgs); CFS_INIT_LIST_HEAD (&the_lnet.ln_active_mds); CFS_INIT_LIST_HEAD (&the_lnet.ln_active_eqs); 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_setup_handle_hash (); if (rc != 0) goto failed0; rc = lnet_create_peer_table(); if (rc != 0) goto failed1; rc = lnet_init_finalizers(); if (rc != 0) goto failed2; the_lnet.ln_nportals = MAX_PORTALS; LIBCFS_ALLOC(the_lnet.ln_portals, the_lnet.ln_nportals * sizeof(*the_lnet.ln_portals)); if (the_lnet.ln_portals == NULL) { rc = -ENOMEM; goto failed3; } for (i = 0; i < the_lnet.ln_nportals; i++) { CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_ml)); CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_msgq)); the_lnet.ln_portals[i].ptl_options = 0; } return 0; failed3: lnet_fini_finalizers(); failed2: lnet_destroy_peer_table(); failed1: lnet_cleanup_handle_hash(); failed0: lnet_descriptor_cleanup(); return rc; } int lnet_unprepare (void) { int idx; /* 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 (list_empty(&the_lnet.ln_test_peers)); LASSERT (the_lnet.ln_refcount == 0); LASSERT (list_empty(&the_lnet.ln_nis)); LASSERT (list_empty(&the_lnet.ln_zombie_nis)); LASSERT (the_lnet.ln_nzombie_nis == 0); for (idx = 0; idx < the_lnet.ln_nportals; idx++) { LASSERT (list_empty(&the_lnet.ln_portals[idx].ptl_msgq)); while (!list_empty (&the_lnet.ln_portals[idx].ptl_ml)) { lnet_me_t *me = list_entry (the_lnet.ln_portals[idx].ptl_ml.next, lnet_me_t, me_list); CERROR ("Active me %p on exit\n", me); list_del (&me->me_list); lnet_me_free (me); } } while (!list_empty (&the_lnet.ln_active_mds)) { lnet_libmd_t *md = list_entry (the_lnet.ln_active_mds.next, lnet_libmd_t, md_list); CERROR ("Active md %p on exit\n", md); list_del (&md->md_list); lnet_md_free (md); } while (!list_empty (&the_lnet.ln_active_eqs)) { lnet_eq_t *eq = list_entry (the_lnet.ln_active_eqs.next, lnet_eq_t, eq_list); CERROR ("Active eq %p on exit\n", eq); list_del (&eq->eq_list); lnet_eq_free (eq); } while (!list_empty (&the_lnet.ln_active_msgs)) { lnet_msg_t *msg = list_entry (the_lnet.ln_active_msgs.next, lnet_msg_t, msg_activelist); CERROR ("Active msg %p on exit\n", msg); LASSERT (msg->msg_onactivelist); msg->msg_onactivelist = 0; list_del (&msg->msg_activelist); lnet_msg_free (msg); } LIBCFS_FREE(the_lnet.ln_portals, the_lnet.ln_nportals * sizeof(*the_lnet.ln_portals)); lnet_free_rtrpools(); lnet_fini_finalizers(); lnet_destroy_peer_table(); lnet_cleanup_handle_hash(); lnet_descriptor_cleanup(); return (0); } lnet_ni_t * lnet_net2ni_locked (__u32 net) { struct list_head *tmp; lnet_ni_t *ni; list_for_each (tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (lnet_ptlcompat_matchnet(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) { struct list_head *tmp; lnet_ni_t *ni; list_for_each (tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (lnet_ptlcompat_matchnid(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 (lnet_ni_t **first_ni) { /* Return the # of NIs that need the acceptor. Return the first one in * *first_ni so the acceptor can pass it connections "blind" to retain * binary compatibility. */ int count = 0; struct list_head *tmp; lnet_ni_t *ni; LNET_LOCK(); list_for_each (tmp, &the_lnet.ln_nis) { ni = list_entry(tmp, lnet_ni_t, ni_list); if (ni->ni_lnd->lnd_accept != NULL) { /* This LND uses the acceptor */ if (count == 0 && first_ni != NULL) { lnet_ni_addref_locked(ni); *first_ni = ni; } count++; } } LNET_UNLOCK(); 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 (list_empty(&the_lnet.ln_zombie_nis)); LASSERT (the_lnet.ln_nzombie_nis == 0); LASSERT (list_empty(&the_lnet.ln_remote_nets)); LNET_LOCK(); the_lnet.ln_shutdown = 1; /* flag shutdown */ /* Unlink NIs from the global table */ while (!list_empty(&the_lnet.ln_nis)) { ni = list_entry(the_lnet.ln_nis.next, lnet_ni_t, ni_list); list_del (&ni->ni_list); the_lnet.ln_nzombie_nis++; lnet_ni_decref_locked(ni); /* drop apini's ref */ } /* Drop the cached eqwait NI. */ if (the_lnet.ln_eqwaitni != NULL) { lnet_ni_decref_locked(the_lnet.ln_eqwaitni); the_lnet.ln_eqwaitni = 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_clear_peer_table(); LNET_LOCK(); /* Now wait for the NI's I just nuked to show up on apini_zombie_nis * and shut them down in guaranteed thread context */ i = 2; while (the_lnet.ln_nzombie_nis != 0) { while (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 = list_entry(the_lnet.ln_zombie_nis.next, lnet_ni_t, ni_list); list_del(&ni->ni_list); ni->ni_lnd->lnd_refcount--; LNET_UNLOCK(); 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)); 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; struct list_head 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 (!list_empty(&nilist)) { ni = list_entry(nilist.next, lnet_ni_t, ni_list); lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid)); LASSERT (libcfs_isknown_lnd(lnd_type)); LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex); lnd = lnet_find_lnd_by_type(lnd_type); #ifdef __KERNEL__ if (lnd == NULL) { LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex); rc = request_module(libcfs_lnd2modname(lnd_type)); LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex); lnd = lnet_find_lnd_by_type(lnd_type); if (lnd == NULL) { LNET_MUTEX_UP(&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 CONFIG_KMOD LCONSOLE_ERROR_MSG(0x104, "Your kernel must be " "compiled with CONFIG_KMOD set for " "automatic module loading."); #endif goto failed; } } #else if (lnd == NULL) { LNET_MUTEX_UP(&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_UP(&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; } list_del(&ni->ni_list); LNET_LOCK(); 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_eqwaitni == NULL) { lnet_ni_addref(ni); the_lnet.ln_eqwaitni = 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]\n", libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits, ni->ni_txcredits); /* Handle nidstrings for network 0 just like this one */ if (the_lnet.ln_ptlcompat > 0) { if (nicount > 0) { LCONSOLE_ERROR_MSG(0x108, "Can't run > 1 " "network when portals_compatibility is " "set\n"); goto failed; } libcfs_setnet0alias(lnd->lnd_type); } nicount++; } if (the_lnet.ln_eqwaitni != NULL && nicount > 1) { lnd_type = the_lnet.ln_eqwaitni->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 (!list_empty(&nilist)) { ni = list_entry(nilist.next, lnet_ni_t, ni_list); list_del(&ni->ni_list); LIBCFS_FREE(ni, sizeof(*ni)); } return -ENETDOWN; } int LNetInit(void) { int rc; lnet_assert_wire_constants (); LASSERT (!the_lnet.ln_init); memset(&the_lnet, 0, sizeof(the_lnet)); rc = lnet_get_portals_compatibility(); if (rc < 0) return rc; lnet_init_locks(); CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds); the_lnet.ln_ptlcompat = rc; the_lnet.ln_refcount = 0; the_lnet.ln_init = 1; #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; } void LNetFini(void) { LASSERT (the_lnet.ln_init); LASSERT (the_lnet.ln_refcount == 0); while (!list_empty(&the_lnet.ln_lnds)) lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next, lnd_t, lnd_list)); lnet_fini_locks(); the_lnet.ln_init = 0; } int LNetNIInit(lnet_pid_t requested_pid) { int im_a_router = 0; int rc; LNET_MUTEX_DOWN(&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; } 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... */ rc = lnet_router_checker_start(); if (rc != 0) goto failed3; rc = lnet_ping_target_init(); if (rc != 0) goto failed4; lnet_proc_init(); goto out; failed4: lnet_router_checker_stop(); 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_UP(&the_lnet.ln_api_mutex); return rc; } int LNetNIFini() { LNET_MUTEX_DOWN(&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_ping_target_fini(); lnet_router_checker_stop(); /* 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_UP(&the_lnet.ln_api_mutex); return 0; } int LNetCtl(unsigned int cmd, void *arg) { struct libcfs_ioctl_data *data = arg; lnet_process_id_t id; 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, (time_t)data->ioc_u64[0]); case IOC_LIBCFS_PORTALS_COMPATIBILITY: return the_lnet.ln_ptlcompat; 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: rc = lnet_ping((lnet_process_id_t) {.nid = data->ioc_nid, .pid = data->ioc_u32[0]}, 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 */ lnet_process_id_t *id = 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 */ } int LNetGetId(unsigned int index, lnet_process_id_t *id) { lnet_ni_t *ni; struct list_head *tmp; int rc = -ENOENT; LASSERT (the_lnet.ln_init); LASSERT (the_lnet.ln_refcount > 0); LNET_LOCK(); list_for_each(tmp, &the_lnet.ln_nis) { if (index-- != 0) continue; ni = list_entry(tmp, lnet_ni_t, ni_list); id->nid = ni->ni_nid; id->pid = the_lnet.ln_pid; rc = 0; break; } LNET_UNLOCK(); return rc; } void LNetSnprintHandle(char *str, int len, lnet_handle_any_t h) { snprintf(str, len, LPX64, h.cookie); } int lnet_ping_target_init(void) { lnet_handle_me_t meh; lnet_process_id_t id; int rc; int rc2; int n; int infosz; int i; for (n = 0; ; n++) { rc = LNetGetId(n, &id); if (rc == -ENOENT) break; LASSERT (rc == 0); } infosz = offsetof(lnet_ping_info_t, pi_nid[n]); LIBCFS_ALLOC(the_lnet.ln_ping_info, infosz); if (the_lnet.ln_ping_info == NULL) { CERROR("Can't allocate ping info[%d]\n", n); return -ENOMEM; } the_lnet.ln_ping_info->pi_magic = LNET_PROTO_PING_MAGIC; the_lnet.ln_ping_info->pi_version = LNET_PROTO_PING_VERSION; the_lnet.ln_ping_info->pi_pid = the_lnet.ln_pid; the_lnet.ln_ping_info->pi_nnids = n; for (i = 0; i < n; i++) { rc = LNetGetId(i, &id); LASSERT (rc == 0); the_lnet.ln_ping_info->pi_nid[i] = id.nid; } /* 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; } rc = LNetMEAttach(LNET_RESERVED_PORTAL, (lnet_process_id_t){.nid = LNET_NID_ANY, .pid = LNET_PID_ANY}, LNET_PROTO_PING_MATCHBITS, 0LL, LNET_UNLINK, LNET_INS_AFTER, &meh); if (rc != 0) { CERROR("Can't create ping ME: %d\n", rc); goto failed_1; } rc = LNetMDAttach(meh, (lnet_md_t){.start = the_lnet.ln_ping_info, .length = infosz, .threshold = LNET_MD_THRESH_INF, .options = (LNET_MD_OP_GET | LNET_MD_TRUNCATE | LNET_MD_MANAGE_REMOTE), .eq_handle = the_lnet.ln_ping_target_eq}, 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: LIBCFS_FREE(the_lnet.ln_ping_info, infosz); 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); LIBCFS_FREE(the_lnet.ln_ping_info, offsetof(lnet_ping_info_t, pi_nid[the_lnet.ln_ping_info->pi_nnids])); 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; int which; int unlinked = 0; int replied = 0; const int a_long_time = 60000; /* mS */ int infosz = offsetof(lnet_ping_info_t, pi_nid[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; } rc = LNetMDBind((lnet_md_t){.start = info, .length = infosz, .threshold = 2, /* GET/REPLY */ .options = LNET_MD_TRUNCATE, .eq_handle = eqh}, 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)) { /* NB I might be swabbing garbage until I check below, but it * doesn't matter */ __swab32s(&info->pi_version); __swab32s(&info->pi_pid); __swab32s(&info->pi_nnids); for (i = 0; i < info->pi_nnids && i < n_ids; i++) __swab64s(&info->pi_nid[i]); } 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_nid[0])) { CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id), nob, (int)offsetof(lnet_ping_info_t, pi_nid[0])); goto out_1; } if (info->pi_nnids < n_ids) n_ids = info->pi_nnids; if (nob < offsetof(lnet_ping_info_t, pi_nid[n_ids])) { CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id), nob, (int)offsetof(lnet_ping_info_t, pi_nid[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_nid[i]; #ifdef __KERNEL__ if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid))) goto out_1; #else ids[i] = tmpid; #endif } rc = info->pi_nnids; out_1: rc2 = LNetEQFree(eqh); if (rc2 != 0) CERROR("rc2 %d\n", rc2); LASSERT (rc2 == 0); out_0: LIBCFS_FREE(info, infosz); return rc; }