4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 #define DEBUG_SUBSYSTEM S_LNET
34 #include <linux/ctype.h>
35 #include <linux/inetdevice.h>
36 #include <linux/nsproxy.h>
37 #include <net/net_namespace.h>
38 #include <lnet/lib-lnet.h>
40 /* tmp struct for parsing routes */
41 struct lnet_text_buf {
42 struct list_head ltb_list; /* stash on lists */
43 int ltb_size; /* allocated size */
44 char ltb_text[0]; /* text buffer */
47 static int lnet_tbnob = 0; /* track text buf allocation */
48 #define LNET_MAX_TEXTBUF_NOB (64<<10) /* bound allocation */
49 #define LNET_SINGLE_TEXTBUF_NOB (4<<10)
51 #define SPACESTR " \t\v\r\n"
52 #define DELIMITERS ":()[]"
55 lnet_syntax(const char *name, const char *str, int offset, int width)
57 static char dots[LNET_SINGLE_TEXTBUF_NOB];
58 static char dashes[LNET_SINGLE_TEXTBUF_NOB];
60 memset(dots, '.', sizeof(dots));
61 dots[sizeof(dots)-1] = 0;
62 memset(dashes, '-', sizeof(dashes));
63 dashes[sizeof(dashes)-1] = 0;
65 LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
66 LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
67 (int)strlen(name), dots, offset, dots,
68 (width < 1) ? 0 : width - 1, dashes);
85 lnet_net_unique(__u32 net_id, struct list_head *netlist,
86 struct lnet_net **net)
88 struct lnet_net *net_l;
93 list_for_each_entry(net_l, netlist, net_list) {
94 if (net_l->net_id == net_id) {
104 /* check that the NI is unique within the list of NIs already added to
107 lnet_ni_unique_net(struct list_head *nilist, char *iface)
109 struct list_head *tmp;
112 list_for_each(tmp, nilist) {
113 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
115 if (ni->ni_interface != NULL &&
116 strncmp(ni->ni_interface, iface, strlen(iface)) == 0)
123 in_array(__u32 *array, __u32 size, __u32 value)
127 for (i = 0; i < size; i++) {
128 if (array[i] == value)
136 lnet_net_append_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
138 __u32 *added_cpts = NULL;
139 int i, j = 0, rc = 0;
142 * no need to go futher since a subset of the NIs already exist on
145 if (net->net_ncpts == LNET_CPT_NUMBER)
149 /* there is an NI which will exist on all CPTs */
150 if (net->net_cpts != NULL)
151 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
152 net->net_cpts = NULL;
153 net->net_ncpts = LNET_CPT_NUMBER;
157 if (net->net_cpts == NULL) {
158 CFS_ALLOC_PTR_ARRAY(net->net_cpts, ncpts);
159 if (net->net_cpts == NULL)
161 memcpy(net->net_cpts, cpts, ncpts * sizeof(*net->net_cpts));
162 net->net_ncpts = ncpts;
166 CFS_ALLOC_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
167 if (added_cpts == NULL)
170 for (i = 0; i < ncpts; i++) {
171 if (!in_array(net->net_cpts, net->net_ncpts, cpts[i])) {
172 added_cpts[j] = cpts[i];
177 /* append the new cpts if any to the list of cpts in the net */
179 __u32 *array = NULL, *loc;
180 __u32 total_entries = j + net->net_ncpts;
182 CFS_ALLOC_PTR_ARRAY(array, total_entries);
188 memcpy(array, net->net_cpts,
189 net->net_ncpts * sizeof(*net->net_cpts));
190 loc = array + net->net_ncpts;
191 memcpy(loc, added_cpts, j * sizeof(*net->net_cpts));
193 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
194 net->net_ncpts = total_entries;
195 net->net_cpts = array;
199 CFS_FREE_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
205 lnet_net_remove_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
211 * Operation Assumption:
212 * This function is called after an NI has been removed from
215 * if we're removing an NI which exists on all CPTs then
216 * we have to check if any of the other NIs on this net also
217 * exists on all CPTs. If none, then we need to build our Net CPT
218 * list based on the remaining NIs.
220 * If the NI being removed exist on a subset of the CPTs then we
221 * alo rebuild the Net CPT list based on the remaining NIs, which
222 * should resutl in the expected Net CPT list.
226 * sometimes this function can be called due to some failure
227 * creating an NI, before any of the cpts are allocated, so check
228 * for that case and don't do anything
233 if (ncpts == LNET_CPT_NUMBER) {
235 * first iteration through the NI list in the net to see
236 * if any of the NIs exist on all the CPTs. If one is
237 * found then our job is done.
239 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
240 if (ni->ni_ncpts == LNET_CPT_NUMBER)
246 * Rebuild the Net CPT list again, thereby only including only the
247 * CPTs which the remaining NIs are associated with.
249 if (net->net_cpts != NULL) {
250 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
251 net->net_cpts = NULL;
254 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
255 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts,
258 CERROR("Out of Memory\n");
260 * do our best to keep on going. Delete
261 * the net cpts and set it to NULL. This
262 * way we can keep on going but less
263 * efficiently, since memory accesses might be
266 if (net->net_cpts != NULL) {
267 CFS_FREE_PTR_ARRAY(net->net_cpts,
269 net->net_cpts = NULL;
270 net->net_ncpts = LNET_CPT_NUMBER;
278 lnet_ni_free(struct lnet_ni *ni)
280 lnet_net_remove_cpts(ni->ni_cpts, ni->ni_ncpts, ni->ni_net);
282 if (ni->ni_refs != NULL)
283 cfs_percpt_free(ni->ni_refs);
285 if (ni->ni_tx_queues != NULL)
286 cfs_percpt_free(ni->ni_tx_queues);
288 if (ni->ni_cpts != NULL)
289 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
291 if (ni->ni_interface != NULL) {
292 LIBCFS_FREE(ni->ni_interface,
293 strlen(ni->ni_interface) + 1);
296 /* release reference to net namespace */
297 if (ni->ni_net_ns != NULL)
298 put_net(ni->ni_net_ns);
300 LIBCFS_FREE(ni, sizeof(*ni));
304 lnet_net_free(struct lnet_net *net)
306 struct list_head *tmp, *tmp2;
309 LASSERT(list_empty(&net->net_ni_zombie));
312 * delete any nis that haven't been added yet. This could happen
313 * if there is a failure on net startup
315 list_for_each_safe(tmp, tmp2, &net->net_ni_added) {
316 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
317 list_del_init(&ni->ni_netlist);
321 /* delete any nis which have been started. */
322 list_for_each_safe(tmp, tmp2, &net->net_ni_list) {
323 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
324 list_del_init(&ni->ni_netlist);
328 if (net->net_cpts != NULL)
329 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
331 LIBCFS_FREE(net, sizeof(*net));
335 lnet_net_alloc(__u32 net_id, struct list_head *net_list)
337 struct lnet_net *net;
339 if (!lnet_net_unique(net_id, net_list, &net)) {
340 CDEBUG(D_NET, "Returning duplicate net %p %s\n", net,
341 libcfs_net2str(net->net_id));
345 LIBCFS_ALLOC(net, sizeof(*net));
347 CERROR("Out of memory creating network %s\n",
348 libcfs_net2str(net_id));
352 INIT_LIST_HEAD(&net->net_list);
353 INIT_LIST_HEAD(&net->net_ni_list);
354 INIT_LIST_HEAD(&net->net_ni_added);
355 INIT_LIST_HEAD(&net->net_ni_zombie);
356 INIT_LIST_HEAD(&net->net_rtr_pref_nids);
357 spin_lock_init(&net->net_lock);
359 net->net_id = net_id;
360 net->net_last_alive = ktime_get_real_seconds();
362 net->net_sel_priority = LNET_MAX_SELECTION_PRIORITY;
364 /* initialize global paramters to undefiend */
365 net->net_tunables.lct_peer_timeout = -1;
366 net->net_tunables.lct_max_tx_credits = -1;
367 net->net_tunables.lct_peer_tx_credits = -1;
368 net->net_tunables.lct_peer_rtr_credits = -1;
371 list_add_tail(&net->net_list, net_list);
377 lnet_ni_add_interface(struct lnet_ni *ni, char *iface)
384 /* Allocate a separate piece of memory and copy
385 * into it the string, so we don't have
386 * a depencency on the tokens string. This way we
387 * can free the tokens at the end of the function.
388 * The newly allocated ni_interface can be
389 * freed when freeing the NI */
390 if (ni->ni_interface != NULL)
394 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
396 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
400 LIBCFS_ALLOC(ni->ni_interface,
403 if (ni->ni_interface == NULL) {
404 CERROR("Can't allocate net interface name\n");
408 strncpy(ni->ni_interface, iface,
414 static struct lnet_ni *
415 lnet_ni_alloc_common(struct lnet_net *net, char *iface)
417 struct lnet_tx_queue *tq;
422 /* make sure that this NI is unique in the net it's
424 if (!lnet_ni_unique_net(&net->net_ni_added, iface))
427 LIBCFS_ALLOC(ni, sizeof(*ni));
429 CERROR("Out of memory creating network interface %s%s\n",
430 libcfs_net2str(net->net_id),
431 (iface != NULL) ? iface : "");
435 spin_lock_init(&ni->ni_lock);
436 INIT_LIST_HEAD(&ni->ni_netlist);
437 INIT_LIST_HEAD(&ni->ni_recovery);
438 LNetInvalidateMDHandle(&ni->ni_ping_mdh);
439 ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
440 sizeof(*ni->ni_refs[0]));
441 if (ni->ni_refs == NULL)
444 ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
445 sizeof(*ni->ni_tx_queues[0]));
446 if (ni->ni_tx_queues == NULL)
449 cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
450 INIT_LIST_HEAD(&tq->tq_delayed);
453 /* LND will fill in the address part of the NID */
454 ni->ni_nid = LNET_MKNID(net->net_id, 0);
456 /* Store net namespace in which current ni is being created */
457 if (current->nsproxy && current->nsproxy->net_ns)
458 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
460 ni->ni_net_ns = get_net(&init_net);
462 ni->ni_state = LNET_NI_STATE_INIT;
463 ni->ni_sel_priority = LNET_MAX_SELECTION_PRIORITY;
464 list_add_tail(&ni->ni_netlist, &net->net_ni_added);
467 * if an interface name is provided then make sure to add in that
468 * interface name in NI
471 if (lnet_ni_add_interface(ni, iface) != 0)
480 /* allocate and add to the provided network */
482 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el, char *iface)
487 ni = lnet_ni_alloc_common(net, iface);
493 ni->ni_ncpts = LNET_CPT_NUMBER;
495 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
497 CERROR("Failed to set CPTs for NI %s(%s): %d\n",
498 libcfs_net2str(net->net_id),
499 (iface != NULL) ? iface : "", rc);
503 LASSERT(rc <= LNET_CPT_NUMBER);
504 if (rc == LNET_CPT_NUMBER) {
505 CFS_FREE_PTR_ARRAY(ni->ni_cpts, rc);
512 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
523 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
529 ni = lnet_ni_alloc_common(net, iface);
535 ni->ni_ncpts = LNET_CPT_NUMBER;
537 size_t array_size = ncpts * sizeof(ni->ni_cpts[0]);
539 CFS_ALLOC_PTR_ARRAY(ni->ni_cpts, ncpts);
540 if (ni->ni_cpts == NULL)
542 memcpy(ni->ni_cpts, cpts, array_size);
543 ni->ni_ncpts = ncpts;
546 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
557 * Parse the networks string and create the matching set of NIs on the
561 lnet_parse_networks(struct list_head *netlist, const char *networks)
563 struct cfs_expr_list *net_el = NULL;
564 struct cfs_expr_list *ni_el = NULL;
568 struct lnet_net *net;
569 struct lnet_ni *ni = NULL;
573 if (networks == NULL) {
574 CERROR("networks string is undefined\n");
578 if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
579 /* _WAY_ conservative */
580 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
585 tokensize = strlen(networks) + 1;
587 LIBCFS_ALLOC(tokens, tokensize);
588 if (tokens == NULL) {
589 CERROR("Can't allocate net tokens\n");
593 memcpy(tokens, networks, tokensize);
599 * NB we don't check interface conflicts here; it's the LNDs
600 * responsibility (if it cares at all)
609 * Parse a network string into its components.
611 * <name>{"("...")"}{"["<el>"]"}
614 /* Network name (mandatory) */
615 while (isspace(*str))
620 str += strcspn(str, SPACESTR ":()[],");
621 while (isspace(*str))
624 /* Interface list (optional) */
628 str += strcspn(str, ")");
635 } while (isspace(*str));
640 /* CPT expression (optional) */
643 str += strcspn(str, "]");
648 rc = cfs_expr_list_parse(elstr, str - elstr + 1,
649 0, LNET_CPT_NUMBER - 1,
658 } while (isspace(*str));
662 if (*str && (strchr(DELIMITERS, *str) != NULL))
665 /* go to the next net if it exits */
666 str += strcspn(str, ",");
671 * At this point the name is properly terminated.
673 net_id = libcfs_str2net(name);
674 if (net_id == LNET_NET_ANY) {
675 LCONSOLE_ERROR_MSG(0x113,
676 "Unrecognised network type\n");
681 if (LNET_NETTYP(net_id) == LOLND) {
682 /* Loopback is implicit, and there can be only one. */
684 cfs_expr_list_free(net_el);
687 /* Should we error out instead? */
692 * All network paramaters are now known.
696 /* always allocate a net, since we will eventually add an
697 * interface to it, or we will fail, in which case we'll
699 net = lnet_net_alloc(net_id, netlist);
700 if (IS_ERR_OR_NULL(net))
705 * No interface list was specified, allocate a
706 * ni using the defaults.
708 ni = lnet_ni_alloc(net, net_el, NULL);
709 if (IS_ERR_OR_NULL(ni))
714 cfs_expr_list_free(net_el);
724 /* Interface name (mandatory) */
725 while (isspace(*nistr))
728 nistr += strcspn(nistr, SPACESTR "[],");
729 while (isspace(*nistr))
732 /* CPT expression (optional) */
735 nistr += strcspn(nistr, "]");
740 rc = cfs_expr_list_parse(elstr,
742 0, LNET_CPT_NUMBER - 1,
751 } while (isspace(*nistr));
757 * End of single interface specificaton,
758 * advance to the start of the next one, if
764 } while (isspace(*nistr));
775 * At this point the name is properly terminated.
782 ni = lnet_ni_alloc(net, ni_el, name);
783 if (IS_ERR_OR_NULL(ni))
787 if (ni_el != net_el) {
788 cfs_expr_list_free(ni_el);
795 cfs_expr_list_free(net_el);
800 LIBCFS_FREE(tokens, tokensize);
804 lnet_syntax("networks", networks, (int)(str - tokens), strlen(str));
806 /* free the net list and all the nis on each net */
807 while (!list_empty(netlist)) {
808 net = list_entry(netlist->next, struct lnet_net, net_list);
810 list_del_init(&net->net_list);
814 if (ni_el && ni_el != net_el)
815 cfs_expr_list_free(ni_el);
817 cfs_expr_list_free(net_el);
819 LIBCFS_FREE(tokens, tokensize);
824 static struct lnet_text_buf *lnet_new_text_buf(int str_len)
826 struct lnet_text_buf *ltb;
829 /* NB allocate space for the terminating 0 */
830 nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
831 if (nob > LNET_SINGLE_TEXTBUF_NOB) {
832 /* _way_ conservative for "route net gateway..." */
833 CERROR("text buffer too big\n");
837 if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
838 CERROR("Too many text buffers\n");
842 LIBCFS_ALLOC(ltb, nob);
847 ltb->ltb_text[0] = 0;
853 lnet_free_text_buf(struct lnet_text_buf *ltb)
855 lnet_tbnob -= ltb->ltb_size;
856 LIBCFS_FREE(ltb, ltb->ltb_size);
860 lnet_free_text_bufs(struct list_head *tbs)
862 struct lnet_text_buf *ltb;
864 while (!list_empty(tbs)) {
865 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
867 list_del(<b->ltb_list);
868 lnet_free_text_buf(ltb);
873 lnet_str2tbs_sep(struct list_head *tbs, const char *str)
879 struct lnet_text_buf *ltb;
881 /* Split 'str' into separate commands */
883 /* skip leading whitespace */
884 while (isspace(*str))
887 /* scan for separator or comment */
888 for (sep = str; *sep != 0; sep++)
889 if (lnet_issep(*sep) || *sep == '#')
892 nob = (int)(sep - str);
894 ltb = lnet_new_text_buf(nob);
896 lnet_free_text_bufs(&pending);
900 for (i = 0; i < nob; i++)
902 ltb->ltb_text[i] = ' ';
904 ltb->ltb_text[i] = str[i];
906 ltb->ltb_text[nob] = 0;
908 list_add_tail(<b->ltb_list, &pending);
912 /* scan for separator */
915 } while (*sep != 0 && !lnet_issep(*sep));
924 list_splice(&pending, tbs->prev);
929 lnet_expand1tb(struct list_head *list,
930 char *str, char *sep1, char *sep2,
931 char *item, int itemlen)
933 int len1 = (int)(sep1 - str);
934 int len2 = strlen(sep2 + 1);
935 struct lnet_text_buf *ltb;
937 LASSERT (*sep1 == '[');
938 LASSERT (*sep2 == ']');
940 ltb = lnet_new_text_buf(len1 + itemlen + len2);
944 memcpy(ltb->ltb_text, str, len1);
945 memcpy(<b->ltb_text[len1], item, itemlen);
946 memcpy(<b->ltb_text[len1+itemlen], sep2 + 1, len2);
947 ltb->ltb_text[len1 + itemlen + len2] = 0;
949 list_add_tail(<b->ltb_list, list);
954 lnet_str2tbs_expand(struct list_head *tbs, char *str)
969 sep = strchr(str, '[');
970 if (sep == NULL) /* nothing to expand */
973 sep2 = strchr(sep, ']');
977 for (parsed = sep; parsed < sep2; parsed = enditem) {
980 while (enditem < sep2 && *enditem != ',')
983 if (enditem == parsed) /* no empty items */
986 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
988 if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
990 /* simple string enumeration */
991 if (lnet_expand1tb(&pending, str, sep, sep2,
992 parsed, (int)(enditem - parsed)) != 0)
1001 /* range expansion */
1003 if (enditem != parsed + scanned) /* no trailing junk */
1006 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
1007 (hi - lo) % stride != 0)
1010 for (i = lo; i <= hi; i += stride) {
1012 snprintf(num, sizeof(num), "%d", i);
1014 if (nob + 1 == sizeof(num))
1017 if (lnet_expand1tb(&pending, str, sep, sep2,
1023 list_splice(&pending, tbs->prev);
1027 lnet_free_text_bufs(&pending);
1032 lnet_parse_hops (char *str, unsigned int *hops)
1034 int len = strlen(str);
1037 return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
1039 *hops > 0 && *hops < 256);
1042 #define LNET_PRIORITY_SEPARATOR (':')
1045 lnet_parse_priority(char *str, unsigned int *priority, char **token)
1051 sep = strchr(str, LNET_PRIORITY_SEPARATOR);
1056 len = strlen(sep + 1);
1058 if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
1059 /* Update the caller's token pointer so it treats the found
1060 priority as the token to report in the error message. */
1061 *token += sep - str + 1;
1065 CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
1068 * Change priority separator to \0 to be able to parse NID
1075 lnet_parse_route(char *str, int *im_a_router)
1077 /* static scratch buffer OK (single threaded) */
1078 static char cmd[LNET_SINGLE_TEXTBUF_NOB];
1081 LIST_HEAD(gateways);
1082 struct list_head *tmp1;
1083 struct list_head *tmp2;
1086 struct lnet_text_buf *ltb;
1094 unsigned int priority = 0;
1096 /* save a copy of the string for error messages */
1097 strncpy(cmd, str, sizeof(cmd));
1098 cmd[sizeof(cmd) - 1] = '\0';
1102 /* scan for token start */
1103 while (isspace(*sep))
1106 if (ntokens < (got_hops ? 3 : 2))
1114 /* scan for token end */
1115 while (*sep != 0 && !isspace(*sep))
1121 tmp2 = &nets; /* expanding nets */
1122 } else if (ntokens == 2 &&
1123 lnet_parse_hops(token, &hops)) {
1124 got_hops = 1; /* got a hop count */
1127 tmp2 = &gateways; /* expanding gateways */
1130 ltb = lnet_new_text_buf(strlen(token));
1134 strcpy(ltb->ltb_text, token);
1135 tmp1 = <b->ltb_list;
1136 list_add_tail(tmp1, tmp2);
1138 while (tmp1 != tmp2) {
1139 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1141 rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
1147 if (rc > 0) { /* expanded! */
1148 list_del(<b->ltb_list);
1149 lnet_free_text_buf(ltb);
1154 net = libcfs_str2net(ltb->ltb_text);
1155 if (net == LNET_NET_ANY ||
1156 LNET_NETTYP(net) == LOLND)
1159 rc = lnet_parse_priority(ltb->ltb_text,
1164 nid = libcfs_str2nid(ltb->ltb_text);
1165 if (nid == LNET_NID_ANY || nid == LNET_NID_LO_0)
1171 /* if there are no hops set then we want to flag this value as
1172 * unset since hops is an optional parameter */
1174 hops = LNET_UNDEFINED_HOPS;
1176 LASSERT(!list_empty(&nets));
1177 LASSERT(!list_empty(&gateways));
1179 list_for_each(tmp1, &nets) {
1180 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1181 net = libcfs_str2net(ltb->ltb_text);
1182 LASSERT(net != LNET_NET_ANY);
1184 list_for_each(tmp2, &gateways) {
1185 ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
1186 nid = libcfs_str2nid(ltb->ltb_text);
1187 LASSERT(nid != LNET_NID_ANY);
1189 if (lnet_islocalnid(nid)) {
1194 rc = lnet_add_route(net, hops, nid, priority, 1);
1195 if (rc != 0 && rc != -EEXIST && rc != -EHOSTUNREACH) {
1196 CERROR("Can't create route "
1198 libcfs_net2str(net),
1199 libcfs_nid2str(nid));
1209 lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
1211 lnet_free_text_bufs(&nets);
1212 lnet_free_text_bufs(&gateways);
1217 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
1219 struct lnet_text_buf *ltb;
1221 while (!list_empty(tbs)) {
1222 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
1224 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
1225 lnet_free_text_bufs(tbs);
1229 list_del(<b->ltb_list);
1230 lnet_free_text_buf(ltb);
1237 lnet_parse_routes(const char *routes, int *im_a_router)
1244 if (lnet_str2tbs_sep(&tbs, routes) < 0) {
1245 CERROR("Error parsing routes\n");
1248 rc = lnet_parse_route_tbs(&tbs, im_a_router);
1251 LASSERT (lnet_tbnob == 0);
1256 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
1262 rc = cfs_ip_addr_parse(token, len, &list);
1266 for (rc = i = 0; !rc && i < nip; i++)
1267 rc = cfs_ip_addr_match(ipaddrs[i], &list);
1269 cfs_expr_list_free_list(&list);
1275 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
1277 static char tokens[LNET_SINGLE_TEXTBUF_NOB];
1287 LASSERT(strlen(net_entry) < sizeof(tokens));
1289 /* work on a copy of the string */
1290 strcpy(tokens, net_entry);
1293 /* scan for token start */
1294 while (isspace(*sep))
1301 /* scan for token end */
1302 while (*sep != 0 && !isspace(*sep))
1307 if (ntokens++ == 0) {
1312 len = strlen(token);
1314 rc = lnet_match_network_token(token, len, ipaddrs, nip);
1316 lnet_syntax("ip2nets", net_entry,
1317 (int)(token - tokens), len);
1321 matched |= (rc != 0);
1327 strcpy(net_entry, net); /* replace with matched net */
1332 lnet_netspec2net(char *netspec)
1334 char *bracket = strchr(netspec, '(');
1337 if (bracket != NULL)
1340 net = libcfs_str2net(netspec);
1342 if (bracket != NULL)
1349 lnet_splitnets(char *source, struct list_head *nets)
1354 struct lnet_text_buf *tb;
1355 struct lnet_text_buf *tb2;
1356 struct list_head *t;
1361 LASSERT(!list_empty(nets));
1362 LASSERT(nets->next == nets->prev); /* single entry */
1364 tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
1367 sep = strchr(tb->ltb_text, ',');
1368 bracket = strchr(tb->ltb_text, '(');
1373 /* netspec lists interfaces... */
1375 offset2 = offset + (int)(bracket - tb->ltb_text);
1376 len = strlen(bracket);
1378 bracket = strchr(bracket + 1, ')');
1380 if (bracket == NULL ||
1381 !(bracket[1] == ',' || bracket[1] == 0)) {
1382 lnet_syntax("ip2nets", source, offset2, len);
1386 sep = (bracket[1] == 0) ? NULL : bracket + 1;
1392 net = lnet_netspec2net(tb->ltb_text);
1393 if (net == LNET_NET_ANY) {
1394 lnet_syntax("ip2nets", source, offset,
1395 strlen(tb->ltb_text));
1399 list_for_each(t, nets) {
1400 tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1405 if (net == lnet_netspec2net(tb2->ltb_text)) {
1406 /* duplicate network */
1407 lnet_syntax("ip2nets", source, offset,
1408 strlen(tb->ltb_text));
1416 offset += (int)(sep - tb->ltb_text);
1418 tb2 = lnet_new_text_buf(len);
1422 strncpy(tb2->ltb_text, sep, len);
1423 tb2->ltb_text[len] = '\0';
1424 list_add_tail(&tb2->ltb_list, nets);
1431 lnet_match_networks(const char **networksp, const char *ip2nets,
1432 __u32 *ipaddrs, int nip)
1434 static char networks[LNET_SINGLE_TEXTBUF_NOB];
1435 static char source[LNET_SINGLE_TEXTBUF_NOB];
1437 LIST_HEAD(raw_entries);
1438 LIST_HEAD(matched_nets);
1439 LIST_HEAD(current_nets);
1440 struct list_head *t;
1441 struct list_head *t2;
1442 struct lnet_text_buf *tb;
1447 if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1448 CERROR("Error parsing ip2nets\n");
1449 LASSERT(lnet_tbnob == 0);
1458 while (!list_empty(&raw_entries)) {
1459 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1462 strncpy(source, tb->ltb_text, sizeof(source));
1463 source[sizeof(source) - 1] = '\0';
1465 /* replace ltb_text with the network(s) add on match */
1466 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1470 list_del(&tb->ltb_list);
1472 if (rc == 0) { /* no match */
1473 lnet_free_text_buf(tb);
1477 /* split into separate networks */
1478 INIT_LIST_HEAD(¤t_nets);
1479 list_add(&tb->ltb_list, ¤t_nets);
1480 rc = lnet_splitnets(source, ¤t_nets);
1484 list_for_each_safe(t, t2, ¤t_nets) {
1485 tb = list_entry(t, struct lnet_text_buf, ltb_list);
1487 list_move_tail(&tb->ltb_list, &matched_nets);
1489 len += scnprintf(networks + len, sizeof(networks) - len,
1490 "%s%s", (len == 0) ? "" : ",",
1493 if (len >= sizeof(networks)) {
1494 CERROR("Too many matched networks\n");
1504 lnet_free_text_bufs(&raw_entries);
1505 lnet_free_text_bufs(&matched_nets);
1506 lnet_free_text_bufs(¤t_nets);
1507 LASSERT(lnet_tbnob == 0);
1512 *networksp = networks;
1516 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns)
1518 struct lnet_inetdev *ifaces = NULL;
1519 struct net_device *dev;
1522 DECLARE_CONST_IN_IFADDR(ifa);
1525 for_each_netdev(ns, dev) {
1526 int flags = dev_get_flags(dev);
1527 struct in_device *in_dev;
1531 if (flags & IFF_LOOPBACK) /* skip the loopback IF */
1534 if (!(flags & IFF_UP)) {
1535 CWARN("lnet: Ignoring interface %s: it's down\n",
1540 in_dev = __in_dev_get_rtnl(dev);
1542 CWARN("lnet: Interface %s has no IPv4 status.\n",
1547 node_id = dev_to_node(&dev->dev);
1548 cpt = cfs_cpt_of_node(lnet_cpt_table(), node_id);
1550 in_dev_for_each_ifa_rtnl(ifa, in_dev) {
1551 if (nip >= nalloc) {
1552 struct lnet_inetdev *tmp;
1554 nalloc += LNET_INTERFACES_NUM;
1555 tmp = krealloc(ifaces, nalloc * sizeof(*tmp),
1566 ifaces[nip].li_cpt = cpt;
1567 ifaces[nip].li_flags = flags;
1568 ifaces[nip].li_ipaddr = ntohl(ifa->ifa_local);
1569 ifaces[nip].li_netmask = ntohl(ifa->ifa_mask);
1570 strlcpy(ifaces[nip].li_name, ifa->ifa_label,
1571 sizeof(ifaces[nip].li_name));
1580 CERROR("lnet: Can't find any usable interfaces, rc = -ENOENT\n");
1587 EXPORT_SYMBOL(lnet_inet_enumerate);
1590 lnet_parse_ip2nets(const char **networksp, const char *ip2nets)
1592 struct lnet_inetdev *ifaces = NULL;
1593 __u32 *ipaddrs = NULL;
1598 if (current->nsproxy && current->nsproxy->net_ns)
1599 nip = lnet_inet_enumerate(&ifaces, current->nsproxy->net_ns);
1601 nip = lnet_inet_enumerate(&ifaces, &init_net);
1603 if (nip != -ENOENT) {
1604 LCONSOLE_ERROR_MSG(0x117,
1605 "Error %d enumerating local IP interfaces for ip2nets to match\n",
1608 LCONSOLE_ERROR_MSG(0x118,
1609 "No local IP interfaces for ip2nets to match\n");
1614 CFS_ALLOC_PTR_ARRAY(ipaddrs, nip);
1617 CERROR("lnet: Can't allocate ipaddrs[%d], rc = %d\n",
1619 goto out_free_addrs;
1622 for (i = 0; i < nip; i++)
1623 ipaddrs[i] = ifaces[i].li_ipaddr;
1625 rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1627 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1628 } else if (rc == 0) {
1629 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1630 "any local IP interfaces\n");
1633 CFS_FREE_PTR_ARRAY(ipaddrs, nip);
1636 return rc > 0 ? 0 : rc;