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)
379 size_t iface_len = strlen(iface) + 1;
384 if (ni->ni_interface != NULL) {
385 LCONSOLE_ERROR_MSG(0x115, "%s: interface %s already set for net %s: rc = %d\n",
386 iface, ni->ni_interface,
387 libcfs_net2str(LNET_NID_NET(&ni->ni_nid)),
392 /* Allocate memory for the interface, so the code parsing input into
393 * tokens and adding interfaces can free the input safely.
394 * ni->ni_interface is freed in lnet_ni_free().
396 LIBCFS_ALLOC(ni->ni_interface, iface_len);
398 if (ni->ni_interface == NULL) {
399 CERROR("%s: cannot allocate net interface name: rc = %d\n",
404 strscpy(ni->ni_interface, iface, iface_len);
409 static struct lnet_ni *
410 lnet_ni_alloc_common(struct lnet_net *net, char *iface)
412 struct lnet_tx_queue *tq;
417 /* make sure that this NI is unique in the net it's
419 if (!lnet_ni_unique_net(&net->net_ni_added, iface))
422 LIBCFS_ALLOC(ni, sizeof(*ni));
424 CERROR("Out of memory creating network interface %s%s\n",
425 libcfs_net2str(net->net_id),
426 (iface != NULL) ? iface : "");
430 spin_lock_init(&ni->ni_lock);
431 INIT_LIST_HEAD(&ni->ni_netlist);
432 INIT_LIST_HEAD(&ni->ni_recovery);
433 LNetInvalidateMDHandle(&ni->ni_ping_mdh);
434 ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
435 sizeof(*ni->ni_refs[0]));
436 if (ni->ni_refs == NULL)
439 ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
440 sizeof(*ni->ni_tx_queues[0]));
441 if (ni->ni_tx_queues == NULL)
444 cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
445 INIT_LIST_HEAD(&tq->tq_delayed);
448 /* LND will fill in the address part of the NID */
449 ni->ni_nid.nid_type = LNET_NETTYP(net->net_id);
450 ni->ni_nid.nid_num = cpu_to_be16(LNET_NETNUM(net->net_id));
452 /* Store net namespace in which current ni is being created */
453 if (current->nsproxy && current->nsproxy->net_ns)
454 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
456 ni->ni_net_ns = get_net(&init_net);
458 ni->ni_state = LNET_NI_STATE_INIT;
459 ni->ni_sel_priority = LNET_MAX_SELECTION_PRIORITY;
460 list_add_tail(&ni->ni_netlist, &net->net_ni_added);
463 * if an interface name is provided then make sure to add in that
464 * interface name in NI
467 if (lnet_ni_add_interface(ni, iface) != 0)
476 /* allocate and add to the provided network */
478 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el, char *iface)
483 ni = lnet_ni_alloc_common(net, iface);
489 ni->ni_ncpts = LNET_CPT_NUMBER;
491 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
493 CERROR("Failed to set CPTs for NI %s(%s): %d\n",
494 libcfs_net2str(net->net_id),
495 (iface != NULL) ? iface : "", rc);
499 LASSERT(rc <= LNET_CPT_NUMBER);
500 if (rc == LNET_CPT_NUMBER) {
501 CFS_FREE_PTR_ARRAY(ni->ni_cpts, rc);
508 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
519 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
525 ni = lnet_ni_alloc_common(net, iface);
531 ni->ni_ncpts = LNET_CPT_NUMBER;
533 size_t array_size = ncpts * sizeof(ni->ni_cpts[0]);
535 CFS_ALLOC_PTR_ARRAY(ni->ni_cpts, ncpts);
536 if (ni->ni_cpts == NULL)
538 memcpy(ni->ni_cpts, cpts, array_size);
539 ni->ni_ncpts = ncpts;
542 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
553 * Parse the networks string and create the matching set of NIs on the
557 lnet_parse_networks(struct list_head *netlist, const char *networks)
559 struct cfs_expr_list *net_el = NULL;
560 struct cfs_expr_list *ni_el = NULL;
564 struct lnet_net *net;
565 struct lnet_ni *ni = NULL;
569 if (networks == NULL) {
570 CERROR("networks string is undefined\n");
574 if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
575 /* _WAY_ conservative */
576 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
581 tokensize = strlen(networks) + 1;
583 LIBCFS_ALLOC(tokens, tokensize);
584 if (tokens == NULL) {
585 CERROR("Can't allocate net tokens\n");
589 memcpy(tokens, networks, tokensize);
595 * NB we don't check interface conflicts here; it's the LNDs
596 * responsibility (if it cares at all)
605 * Parse a network string into its components.
607 * <name>{"("...")"}{"["<el>"]"}
610 /* Network name (mandatory) */
611 while (isspace(*str))
616 str += strcspn(str, SPACESTR ":()[],");
617 while (isspace(*str))
620 /* Interface list (optional) */
624 str += strcspn(str, ")");
631 } while (isspace(*str));
636 /* CPT expression (optional) */
639 str += strcspn(str, "]");
644 rc = cfs_expr_list_parse(elstr, str - elstr + 1,
645 0, LNET_CPT_NUMBER - 1,
654 } while (isspace(*str));
658 if (*str && (strchr(DELIMITERS, *str) != NULL))
661 /* go to the next net if it exits */
662 str += strcspn(str, ",");
667 * At this point the name is properly terminated.
669 net_id = libcfs_str2net(name);
670 if (net_id == LNET_NET_ANY) {
671 LCONSOLE_ERROR_MSG(0x113,
672 "Unrecognised network type\n");
677 if (LNET_NETTYP(net_id) == LOLND) {
678 /* Loopback is implicit, and there can be only one. */
680 cfs_expr_list_free(net_el);
683 /* Should we error out instead? */
688 * All network paramaters are now known.
692 /* always allocate a net, since we will eventually add an
693 * interface to it, or we will fail, in which case we'll
695 net = lnet_net_alloc(net_id, netlist);
696 if (IS_ERR_OR_NULL(net))
701 * No interface list was specified, allocate a
702 * ni using the defaults.
704 ni = lnet_ni_alloc(net, net_el, NULL);
705 if (IS_ERR_OR_NULL(ni))
710 cfs_expr_list_free(net_el);
720 /* Interface name (mandatory) */
721 while (isspace(*nistr))
724 nistr += strcspn(nistr, SPACESTR "[],");
725 while (isspace(*nistr))
728 /* CPT expression (optional) */
731 nistr += strcspn(nistr, "]");
736 rc = cfs_expr_list_parse(elstr,
738 0, LNET_CPT_NUMBER - 1,
747 } while (isspace(*nistr));
753 * End of single interface specificaton,
754 * advance to the start of the next one, if
760 } while (isspace(*nistr));
771 * At this point the name is properly terminated.
778 ni = lnet_ni_alloc(net, ni_el, name);
779 if (IS_ERR_OR_NULL(ni))
783 if (ni_el != net_el) {
784 cfs_expr_list_free(ni_el);
791 cfs_expr_list_free(net_el);
796 LIBCFS_FREE(tokens, tokensize);
800 lnet_syntax("networks", networks, (int)(str - tokens), strlen(str));
802 /* free the net list and all the nis on each net */
803 while (!list_empty(netlist)) {
804 net = list_entry(netlist->next, struct lnet_net, net_list);
806 list_del_init(&net->net_list);
810 if (ni_el && ni_el != net_el)
811 cfs_expr_list_free(ni_el);
813 cfs_expr_list_free(net_el);
815 LIBCFS_FREE(tokens, tokensize);
820 static struct lnet_text_buf *lnet_new_text_buf(int str_len)
822 struct lnet_text_buf *ltb;
825 /* NB allocate space for the terminating 0 */
826 nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
827 if (nob > LNET_SINGLE_TEXTBUF_NOB) {
828 /* _way_ conservative for "route net gateway..." */
829 CERROR("text buffer too big\n");
833 if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
834 CERROR("Too many text buffers\n");
838 LIBCFS_ALLOC(ltb, nob);
843 ltb->ltb_text[0] = 0;
849 lnet_free_text_buf(struct lnet_text_buf *ltb)
851 lnet_tbnob -= ltb->ltb_size;
852 LIBCFS_FREE(ltb, ltb->ltb_size);
856 lnet_free_text_bufs(struct list_head *tbs)
858 struct lnet_text_buf *ltb;
860 while (!list_empty(tbs)) {
861 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
863 list_del(<b->ltb_list);
864 lnet_free_text_buf(ltb);
869 lnet_str2tbs_sep(struct list_head *tbs, const char *str)
875 struct lnet_text_buf *ltb;
877 /* Split 'str' into separate commands */
879 /* skip leading whitespace */
880 while (isspace(*str))
883 /* scan for separator or comment */
884 for (sep = str; *sep != 0; sep++)
885 if (lnet_issep(*sep) || *sep == '#')
888 nob = (int)(sep - str);
890 ltb = lnet_new_text_buf(nob);
892 lnet_free_text_bufs(&pending);
896 for (i = 0; i < nob; i++)
898 ltb->ltb_text[i] = ' ';
900 ltb->ltb_text[i] = str[i];
902 ltb->ltb_text[nob] = 0;
904 list_add_tail(<b->ltb_list, &pending);
908 /* scan for separator */
911 } while (*sep != 0 && !lnet_issep(*sep));
920 list_splice(&pending, tbs->prev);
925 lnet_expand1tb(struct list_head *list,
926 char *str, char *sep1, char *sep2,
927 char *item, int itemlen)
929 int len1 = (int)(sep1 - str);
930 int len2 = strlen(sep2 + 1);
931 struct lnet_text_buf *ltb;
933 LASSERT (*sep1 == '[');
934 LASSERT (*sep2 == ']');
936 ltb = lnet_new_text_buf(len1 + itemlen + len2);
940 memcpy(ltb->ltb_text, str, len1);
941 memcpy(<b->ltb_text[len1], item, itemlen);
942 memcpy(<b->ltb_text[len1+itemlen], sep2 + 1, len2);
943 ltb->ltb_text[len1 + itemlen + len2] = 0;
945 list_add_tail(<b->ltb_list, list);
950 lnet_str2tbs_expand(struct list_head *tbs, char *str)
965 sep = strchr(str, '[');
966 if (sep == NULL) /* nothing to expand */
969 sep2 = strchr(sep, ']');
973 for (parsed = sep; parsed < sep2; parsed = enditem) {
976 while (enditem < sep2 && *enditem != ',')
979 if (enditem == parsed) /* no empty items */
982 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
984 if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
986 /* simple string enumeration */
987 if (lnet_expand1tb(&pending, str, sep, sep2,
988 parsed, (int)(enditem - parsed)) != 0)
997 /* range expansion */
999 if (enditem != parsed + scanned) /* no trailing junk */
1002 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
1003 (hi - lo) % stride != 0)
1006 for (i = lo; i <= hi; i += stride) {
1008 snprintf(num, sizeof(num), "%d", i);
1010 if (nob + 1 == sizeof(num))
1013 if (lnet_expand1tb(&pending, str, sep, sep2,
1019 list_splice(&pending, tbs->prev);
1023 lnet_free_text_bufs(&pending);
1028 lnet_parse_hops (char *str, unsigned int *hops)
1030 int len = strlen(str);
1033 return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
1035 *hops > 0 && *hops < 256);
1038 #define LNET_PRIORITY_SEPARATOR (':')
1041 lnet_parse_priority(char *str, unsigned int *priority, char **token)
1047 sep = strchr(str, LNET_PRIORITY_SEPARATOR);
1052 len = strlen(sep + 1);
1054 if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
1055 /* Update the caller's token pointer so it treats the found
1056 priority as the token to report in the error message. */
1057 *token += sep - str + 1;
1061 CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
1064 * Change priority separator to \0 to be able to parse NID
1071 lnet_parse_route(char *str, int *im_a_router)
1073 /* static scratch buffer OK (single threaded) */
1074 static char cmd[LNET_SINGLE_TEXTBUF_NOB];
1077 LIST_HEAD(gateways);
1078 struct list_head *tmp1;
1079 struct list_head *tmp2;
1082 struct lnet_text_buf *ltb;
1090 unsigned int priority = 0;
1092 /* save a copy of the string for error messages */
1093 strncpy(cmd, str, sizeof(cmd));
1094 cmd[sizeof(cmd) - 1] = '\0';
1098 /* scan for token start */
1099 while (isspace(*sep))
1102 if (ntokens < (got_hops ? 3 : 2))
1110 /* scan for token end */
1111 while (*sep != 0 && !isspace(*sep))
1117 tmp2 = &nets; /* expanding nets */
1118 } else if (ntokens == 2 &&
1119 lnet_parse_hops(token, &hops)) {
1120 got_hops = 1; /* got a hop count */
1123 tmp2 = &gateways; /* expanding gateways */
1126 ltb = lnet_new_text_buf(strlen(token));
1130 strcpy(ltb->ltb_text, token);
1131 tmp1 = <b->ltb_list;
1132 list_add_tail(tmp1, tmp2);
1134 while (tmp1 != tmp2) {
1135 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1137 rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
1143 if (rc > 0) { /* expanded! */
1144 list_del(<b->ltb_list);
1145 lnet_free_text_buf(ltb);
1150 net = libcfs_str2net(ltb->ltb_text);
1151 if (net == LNET_NET_ANY ||
1152 LNET_NETTYP(net) == LOLND)
1155 rc = lnet_parse_priority(ltb->ltb_text,
1160 nid = libcfs_str2nid(ltb->ltb_text);
1161 if (nid == LNET_NID_ANY || nid == LNET_NID_LO_0)
1167 /* if there are no hops set then we want to flag this value as
1168 * unset since hops is an optional parameter */
1170 hops = LNET_UNDEFINED_HOPS;
1172 LASSERT(!list_empty(&nets));
1173 LASSERT(!list_empty(&gateways));
1175 list_for_each(tmp1, &nets) {
1176 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1177 net = libcfs_str2net(ltb->ltb_text);
1178 LASSERT(net != LNET_NET_ANY);
1180 list_for_each(tmp2, &gateways) {
1181 ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
1182 nid = libcfs_str2nid(ltb->ltb_text);
1183 LASSERT(nid != LNET_NID_ANY);
1185 if (lnet_islocalnid(nid)) {
1190 rc = lnet_add_route(net, hops, nid, priority, 1);
1191 if (rc != 0 && rc != -EEXIST && rc != -EHOSTUNREACH) {
1192 CERROR("Can't create route "
1194 libcfs_net2str(net),
1195 libcfs_nid2str(nid));
1205 lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
1207 lnet_free_text_bufs(&nets);
1208 lnet_free_text_bufs(&gateways);
1213 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
1215 struct lnet_text_buf *ltb;
1217 while (!list_empty(tbs)) {
1218 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
1220 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
1221 lnet_free_text_bufs(tbs);
1225 list_del(<b->ltb_list);
1226 lnet_free_text_buf(ltb);
1233 lnet_parse_routes(const char *routes, int *im_a_router)
1240 if (lnet_str2tbs_sep(&tbs, routes) < 0) {
1241 CERROR("Error parsing routes\n");
1244 rc = lnet_parse_route_tbs(&tbs, im_a_router);
1247 LASSERT (lnet_tbnob == 0);
1252 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
1258 rc = cfs_ip_addr_parse(token, len, &list);
1262 for (rc = i = 0; !rc && i < nip; i++)
1263 rc = cfs_ip_addr_match(ipaddrs[i], &list);
1265 cfs_expr_list_free_list(&list);
1271 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
1273 static char tokens[LNET_SINGLE_TEXTBUF_NOB];
1283 LASSERT(strlen(net_entry) < sizeof(tokens));
1285 /* work on a copy of the string */
1286 strcpy(tokens, net_entry);
1289 /* scan for token start */
1290 while (isspace(*sep))
1297 /* scan for token end */
1298 while (*sep != 0 && !isspace(*sep))
1303 if (ntokens++ == 0) {
1308 len = strlen(token);
1310 rc = lnet_match_network_token(token, len, ipaddrs, nip);
1312 lnet_syntax("ip2nets", net_entry,
1313 (int)(token - tokens), len);
1317 matched |= (rc != 0);
1323 strcpy(net_entry, net); /* replace with matched net */
1328 lnet_netspec2net(char *netspec)
1330 char *bracket = strchr(netspec, '(');
1333 if (bracket != NULL)
1336 net = libcfs_str2net(netspec);
1338 if (bracket != NULL)
1345 lnet_splitnets(char *source, struct list_head *nets)
1350 struct lnet_text_buf *tb;
1351 struct lnet_text_buf *tb2;
1352 struct list_head *t;
1357 LASSERT(!list_empty(nets));
1358 LASSERT(nets->next == nets->prev); /* single entry */
1360 tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
1363 sep = strchr(tb->ltb_text, ',');
1364 bracket = strchr(tb->ltb_text, '(');
1369 /* netspec lists interfaces... */
1371 offset2 = offset + (int)(bracket - tb->ltb_text);
1372 len = strlen(bracket);
1374 bracket = strchr(bracket + 1, ')');
1376 if (bracket == NULL ||
1377 !(bracket[1] == ',' || bracket[1] == 0)) {
1378 lnet_syntax("ip2nets", source, offset2, len);
1382 sep = (bracket[1] == 0) ? NULL : bracket + 1;
1388 net = lnet_netspec2net(tb->ltb_text);
1389 if (net == LNET_NET_ANY) {
1390 lnet_syntax("ip2nets", source, offset,
1391 strlen(tb->ltb_text));
1395 list_for_each(t, nets) {
1396 tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1401 if (net == lnet_netspec2net(tb2->ltb_text)) {
1402 /* duplicate network */
1403 lnet_syntax("ip2nets", source, offset,
1404 strlen(tb->ltb_text));
1412 offset += (int)(sep - tb->ltb_text);
1414 tb2 = lnet_new_text_buf(len);
1418 strncpy(tb2->ltb_text, sep, len);
1419 tb2->ltb_text[len] = '\0';
1420 list_add_tail(&tb2->ltb_list, nets);
1427 lnet_match_networks(const char **networksp, const char *ip2nets,
1428 __u32 *ipaddrs, int nip)
1430 static char networks[LNET_SINGLE_TEXTBUF_NOB];
1431 static char source[LNET_SINGLE_TEXTBUF_NOB];
1433 LIST_HEAD(raw_entries);
1434 LIST_HEAD(matched_nets);
1435 LIST_HEAD(current_nets);
1436 struct list_head *t;
1437 struct list_head *t2;
1438 struct lnet_text_buf *tb;
1443 if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1444 CERROR("Error parsing ip2nets\n");
1445 LASSERT(lnet_tbnob == 0);
1454 while (!list_empty(&raw_entries)) {
1455 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1458 strncpy(source, tb->ltb_text, sizeof(source));
1459 source[sizeof(source) - 1] = '\0';
1461 /* replace ltb_text with the network(s) add on match */
1462 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1466 list_del(&tb->ltb_list);
1468 if (rc == 0) { /* no match */
1469 lnet_free_text_buf(tb);
1473 /* split into separate networks */
1474 INIT_LIST_HEAD(¤t_nets);
1475 list_add(&tb->ltb_list, ¤t_nets);
1476 rc = lnet_splitnets(source, ¤t_nets);
1480 list_for_each_safe(t, t2, ¤t_nets) {
1481 tb = list_entry(t, struct lnet_text_buf, ltb_list);
1483 list_move_tail(&tb->ltb_list, &matched_nets);
1485 len += scnprintf(networks + len, sizeof(networks) - len,
1486 "%s%s", (len == 0) ? "" : ",",
1489 if (len >= sizeof(networks)) {
1490 CERROR("Too many matched networks\n");
1500 lnet_free_text_bufs(&raw_entries);
1501 lnet_free_text_bufs(&matched_nets);
1502 lnet_free_text_bufs(¤t_nets);
1503 LASSERT(lnet_tbnob == 0);
1508 *networksp = networks;
1512 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns)
1514 struct lnet_inetdev *ifaces = NULL;
1515 struct net_device *dev;
1518 DECLARE_CONST_IN_IFADDR(ifa);
1521 for_each_netdev(ns, dev) {
1522 int flags = dev_get_flags(dev);
1523 struct in_device *in_dev;
1527 if (flags & IFF_LOOPBACK) /* skip the loopback IF */
1530 if (!(flags & IFF_UP)) {
1531 CWARN("lnet: Ignoring interface %s: it's down\n",
1536 in_dev = __in_dev_get_rtnl(dev);
1538 CWARN("lnet: Interface %s has no IPv4 status.\n",
1543 node_id = dev_to_node(&dev->dev);
1544 cpt = cfs_cpt_of_node(lnet_cpt_table(), node_id);
1546 in_dev_for_each_ifa_rtnl(ifa, in_dev) {
1547 if (nip >= nalloc) {
1548 struct lnet_inetdev *tmp;
1550 nalloc += LNET_INTERFACES_NUM;
1551 tmp = krealloc(ifaces, nalloc * sizeof(*tmp),
1562 ifaces[nip].li_cpt = cpt;
1563 ifaces[nip].li_flags = flags;
1564 ifaces[nip].li_ipaddr = ntohl(ifa->ifa_local);
1565 ifaces[nip].li_netmask = ntohl(ifa->ifa_mask);
1566 strlcpy(ifaces[nip].li_name, ifa->ifa_label,
1567 sizeof(ifaces[nip].li_name));
1576 CERROR("lnet: Can't find any usable interfaces, rc = -ENOENT\n");
1583 EXPORT_SYMBOL(lnet_inet_enumerate);
1586 lnet_parse_ip2nets(const char **networksp, const char *ip2nets)
1588 struct lnet_inetdev *ifaces = NULL;
1589 __u32 *ipaddrs = NULL;
1594 if (current->nsproxy && current->nsproxy->net_ns)
1595 nip = lnet_inet_enumerate(&ifaces, current->nsproxy->net_ns);
1597 nip = lnet_inet_enumerate(&ifaces, &init_net);
1599 if (nip != -ENOENT) {
1600 LCONSOLE_ERROR_MSG(0x117,
1601 "Error %d enumerating local IP interfaces for ip2nets to match\n",
1604 LCONSOLE_ERROR_MSG(0x118,
1605 "No local IP interfaces for ip2nets to match\n");
1610 CFS_ALLOC_PTR_ARRAY(ipaddrs, nip);
1613 CERROR("lnet: Can't allocate ipaddrs[%d], rc = %d\n",
1615 goto out_free_addrs;
1618 for (i = 0; i < nip; i++)
1619 ipaddrs[i] = ifaces[i].li_ipaddr;
1621 rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1623 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1624 } else if (rc == 0) {
1625 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1626 "any local IP interfaces\n");
1629 CFS_FREE_PTR_ARRAY(ipaddrs, nip);
1632 return rc > 0 ? 0 : rc;