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37#define DEBUG_SUBSYSTEM S_LNET
38#include "../../include/linux/lnet/lib-lnet.h"
39
40struct lnet_text_buf_t {
41 struct list_head ltb_list;
42 int ltb_size;
43 char ltb_text[0];
44};
45
46static int lnet_tbnob;
47#define LNET_MAX_TEXTBUF_NOB (64<<10)
48#define LNET_SINGLE_TEXTBUF_NOB (4<<10)
49
50static void
51lnet_syntax(char *name, char *str, int offset, int width)
52{
53 static char dots[LNET_SINGLE_TEXTBUF_NOB];
54 static char dashes[LNET_SINGLE_TEXTBUF_NOB];
55
56 memset(dots, '.', sizeof(dots));
57 dots[sizeof(dots)-1] = 0;
58 memset(dashes, '-', sizeof(dashes));
59 dashes[sizeof(dashes)-1] = 0;
60
61 LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
62 LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
63 (int)strlen(name), dots, offset, dots,
64 (width < 1) ? 0 : width - 1, dashes);
65}
66
67static int
68lnet_issep(char c)
69{
70 switch (c) {
71 case '\n':
72 case '\r':
73 case ';':
74 return 1;
75 default:
76 return 0;
77 }
78}
79
80static int
81lnet_net_unique(__u32 net, struct list_head *nilist)
82{
83 struct list_head *tmp;
84 lnet_ni_t *ni;
85
86 list_for_each(tmp, nilist) {
87 ni = list_entry(tmp, lnet_ni_t, ni_list);
88
89 if (LNET_NIDNET(ni->ni_nid) == net)
90 return 0;
91 }
92
93 return 1;
94}
95
96void
97lnet_ni_free(struct lnet_ni *ni)
98{
99 if (ni->ni_refs != NULL)
100 cfs_percpt_free(ni->ni_refs);
101
102 if (ni->ni_tx_queues != NULL)
103 cfs_percpt_free(ni->ni_tx_queues);
104
105 if (ni->ni_cpts != NULL)
106 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
107
108 LIBCFS_FREE(ni, sizeof(*ni));
109}
110
111static lnet_ni_t *
112lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist)
113{
114 struct lnet_tx_queue *tq;
115 struct lnet_ni *ni;
116 int rc;
117 int i;
118
119 if (!lnet_net_unique(net, nilist)) {
120 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
121 libcfs_net2str(net));
122 return NULL;
123 }
124
125 LIBCFS_ALLOC(ni, sizeof(*ni));
126 if (ni == NULL) {
127 CERROR("Out of memory creating network %s\n",
128 libcfs_net2str(net));
129 return NULL;
130 }
131
132 spin_lock_init(&ni->ni_lock);
133 INIT_LIST_HEAD(&ni->ni_cptlist);
134 ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
135 sizeof(*ni->ni_refs[0]));
136 if (ni->ni_refs == NULL)
137 goto failed;
138
139 ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
140 sizeof(*ni->ni_tx_queues[0]));
141 if (ni->ni_tx_queues == NULL)
142 goto failed;
143
144 cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
145 INIT_LIST_HEAD(&tq->tq_delayed);
146
147 if (el == NULL) {
148 ni->ni_cpts = NULL;
149 ni->ni_ncpts = LNET_CPT_NUMBER;
150 } else {
151 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
152 if (rc <= 0) {
153 CERROR("Failed to set CPTs for NI %s: %d\n",
154 libcfs_net2str(net), rc);
155 goto failed;
156 }
157
158 LASSERT(rc <= LNET_CPT_NUMBER);
159 if (rc == LNET_CPT_NUMBER) {
160 LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
161 ni->ni_cpts = NULL;
162 }
163
164 ni->ni_ncpts = rc;
165 }
166
167
168 ni->ni_nid = LNET_MKNID(net, 0);
169 ni->ni_last_alive = ktime_get_real_seconds();
170 list_add_tail(&ni->ni_list, nilist);
171 return ni;
172 failed:
173 lnet_ni_free(ni);
174 return NULL;
175}
176
177int
178lnet_parse_networks(struct list_head *nilist, char *networks)
179{
180 struct cfs_expr_list *el = NULL;
181 int tokensize = strlen(networks) + 1;
182 char *tokens;
183 char *str;
184 char *tmp;
185 struct lnet_ni *ni;
186 __u32 net;
187 int nnets = 0;
188
189 if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
190
191 LCONSOLE_ERROR_MSG(0x112,
192 "Can't parse networks: string too long\n");
193 return -EINVAL;
194 }
195
196 LIBCFS_ALLOC(tokens, tokensize);
197 if (tokens == NULL) {
198 CERROR("Can't allocate net tokens\n");
199 return -ENOMEM;
200 }
201
202 the_lnet.ln_network_tokens = tokens;
203 the_lnet.ln_network_tokens_nob = tokensize;
204 memcpy(tokens, networks, tokensize);
205 str = tmp = tokens;
206
207
208 ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
209 if (ni == NULL)
210 goto failed;
211
212 while (str != NULL && *str != 0) {
213 char *comma = strchr(str, ',');
214 char *bracket = strchr(str, '(');
215 char *square = strchr(str, '[');
216 char *iface;
217 int niface;
218 int rc;
219
220
221
222
223 if (square != NULL && (comma == NULL || square < comma)) {
224
225
226 if (bracket != NULL && bracket > square) {
227 tmp = square;
228 goto failed_syntax;
229 }
230
231 tmp = strchr(square, ']');
232 if (tmp == NULL) {
233 tmp = square;
234 goto failed_syntax;
235 }
236
237 rc = cfs_expr_list_parse(square, tmp - square + 1,
238 0, LNET_CPT_NUMBER - 1, &el);
239 if (rc != 0) {
240 tmp = square;
241 goto failed_syntax;
242 }
243
244 while (square <= tmp)
245 *square++ = ' ';
246 }
247
248 if (bracket == NULL ||
249 (comma != NULL && comma < bracket)) {
250
251
252
253 if (comma != NULL)
254 *comma++ = 0;
255 net = libcfs_str2net(cfs_trimwhite(str));
256
257 if (net == LNET_NIDNET(LNET_NID_ANY)) {
258 LCONSOLE_ERROR_MSG(0x113,
259 "Unrecognised network type\n");
260 tmp = str;
261 goto failed_syntax;
262 }
263
264 if (LNET_NETTYP(net) != LOLND &&
265 lnet_ni_alloc(net, el, nilist) == NULL)
266 goto failed;
267
268 if (el != NULL) {
269 cfs_expr_list_free(el);
270 el = NULL;
271 }
272
273 str = comma;
274 continue;
275 }
276
277 *bracket = 0;
278 net = libcfs_str2net(cfs_trimwhite(str));
279 if (net == LNET_NIDNET(LNET_NID_ANY)) {
280 tmp = str;
281 goto failed_syntax;
282 }
283
284 nnets++;
285 ni = lnet_ni_alloc(net, el, nilist);
286 if (ni == NULL)
287 goto failed;
288
289 if (el != NULL) {
290 cfs_expr_list_free(el);
291 el = NULL;
292 }
293
294 niface = 0;
295 iface = bracket + 1;
296
297 bracket = strchr(iface, ')');
298 if (bracket == NULL) {
299 tmp = iface;
300 goto failed_syntax;
301 }
302
303 *bracket = 0;
304 do {
305 comma = strchr(iface, ',');
306 if (comma != NULL)
307 *comma++ = 0;
308
309 iface = cfs_trimwhite(iface);
310 if (*iface == 0) {
311 tmp = iface;
312 goto failed_syntax;
313 }
314
315 if (niface == LNET_MAX_INTERFACES) {
316 LCONSOLE_ERROR_MSG(0x115,
317 "Too many interfaces for net %s\n",
318 libcfs_net2str(net));
319 goto failed;
320 }
321
322 ni->ni_interfaces[niface++] = iface;
323 iface = comma;
324 } while (iface != NULL);
325
326 str = bracket + 1;
327 comma = strchr(bracket + 1, ',');
328 if (comma != NULL) {
329 *comma = 0;
330 str = cfs_trimwhite(str);
331 if (*str != 0) {
332 tmp = str;
333 goto failed_syntax;
334 }
335 str = comma + 1;
336 continue;
337 }
338
339 str = cfs_trimwhite(str);
340 if (*str != 0) {
341 tmp = str;
342 goto failed_syntax;
343 }
344 }
345
346 LASSERT(!list_empty(nilist));
347 return 0;
348
349 failed_syntax:
350 lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
351 failed:
352 while (!list_empty(nilist)) {
353 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
354
355 list_del(&ni->ni_list);
356 lnet_ni_free(ni);
357 }
358
359 if (el != NULL)
360 cfs_expr_list_free(el);
361
362 LIBCFS_FREE(tokens, tokensize);
363 the_lnet.ln_network_tokens = NULL;
364
365 return -EINVAL;
366}
367
368static struct lnet_text_buf_t *
369lnet_new_text_buf(int str_len)
370{
371 struct lnet_text_buf_t *ltb;
372 int nob;
373
374
375 nob = offsetof(struct lnet_text_buf_t, ltb_text[str_len + 1]);
376 if (nob > LNET_SINGLE_TEXTBUF_NOB) {
377
378 CERROR("text buffer too big\n");
379 return NULL;
380 }
381
382 if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
383 CERROR("Too many text buffers\n");
384 return NULL;
385 }
386
387 LIBCFS_ALLOC(ltb, nob);
388 if (ltb == NULL)
389 return NULL;
390
391 ltb->ltb_size = nob;
392 ltb->ltb_text[0] = 0;
393 lnet_tbnob += nob;
394 return ltb;
395}
396
397static void
398lnet_free_text_buf(struct lnet_text_buf_t *ltb)
399{
400 lnet_tbnob -= ltb->ltb_size;
401 LIBCFS_FREE(ltb, ltb->ltb_size);
402}
403
404static void
405lnet_free_text_bufs(struct list_head *tbs)
406{
407 struct lnet_text_buf_t *ltb;
408
409 while (!list_empty(tbs)) {
410 ltb = list_entry(tbs->next, struct lnet_text_buf_t, ltb_list);
411
412 list_del(<b->ltb_list);
413 lnet_free_text_buf(ltb);
414 }
415}
416
417static int
418lnet_str2tbs_sep(struct list_head *tbs, char *str)
419{
420 struct list_head pending;
421 char *sep;
422 int nob;
423 int i;
424 struct lnet_text_buf_t *ltb;
425
426 INIT_LIST_HEAD(&pending);
427
428
429 for (;;) {
430
431 while (isspace(*str))
432 str++;
433
434
435 for (sep = str; *sep != 0; sep++)
436 if (lnet_issep(*sep) || *sep == '#')
437 break;
438
439 nob = (int)(sep - str);
440 if (nob > 0) {
441 ltb = lnet_new_text_buf(nob);
442 if (ltb == NULL) {
443 lnet_free_text_bufs(&pending);
444 return -1;
445 }
446
447 for (i = 0; i < nob; i++)
448 if (isspace(str[i]))
449 ltb->ltb_text[i] = ' ';
450 else
451 ltb->ltb_text[i] = str[i];
452
453 ltb->ltb_text[nob] = 0;
454
455 list_add_tail(<b->ltb_list, &pending);
456 }
457
458 if (*sep == '#') {
459
460 do {
461 sep++;
462 } while (*sep != 0 && !lnet_issep(*sep));
463 }
464
465 if (*sep == 0)
466 break;
467
468 str = sep + 1;
469 }
470
471 list_splice(&pending, tbs->prev);
472 return 0;
473}
474
475static int
476lnet_expand1tb(struct list_head *list,
477 char *str, char *sep1, char *sep2,
478 char *item, int itemlen)
479{
480 int len1 = (int)(sep1 - str);
481 int len2 = strlen(sep2 + 1);
482 struct lnet_text_buf_t *ltb;
483
484 LASSERT(*sep1 == '[');
485 LASSERT(*sep2 == ']');
486
487 ltb = lnet_new_text_buf(len1 + itemlen + len2);
488 if (ltb == NULL)
489 return -ENOMEM;
490
491 memcpy(ltb->ltb_text, str, len1);
492 memcpy(<b->ltb_text[len1], item, itemlen);
493 memcpy(<b->ltb_text[len1+itemlen], sep2 + 1, len2);
494 ltb->ltb_text[len1 + itemlen + len2] = 0;
495
496 list_add_tail(<b->ltb_list, list);
497 return 0;
498}
499
500static int
501lnet_str2tbs_expand(struct list_head *tbs, char *str)
502{
503 char num[16];
504 struct list_head pending;
505 char *sep;
506 char *sep2;
507 char *parsed;
508 char *enditem;
509 int lo;
510 int hi;
511 int stride;
512 int i;
513 int nob;
514 int scanned;
515
516 INIT_LIST_HEAD(&pending);
517
518 sep = strchr(str, '[');
519 if (sep == NULL)
520 return 0;
521
522 sep2 = strchr(sep, ']');
523 if (sep2 == NULL)
524 goto failed;
525
526 for (parsed = sep; parsed < sep2; parsed = enditem) {
527
528 enditem = ++parsed;
529 while (enditem < sep2 && *enditem != ',')
530 enditem++;
531
532 if (enditem == parsed)
533 goto failed;
534
535 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi,
536 &stride, &scanned) < 3) {
537
538 if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
539
540
541 if (lnet_expand1tb(
542 &pending, str, sep, sep2,
543 parsed,
544 (int)(enditem - parsed)) != 0) {
545 goto failed;
546 }
547
548 continue;
549 }
550
551 stride = 1;
552 }
553
554
555
556 if (enditem != parsed + scanned)
557 goto failed;
558
559 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
560 (hi - lo) % stride != 0)
561 goto failed;
562
563 for (i = lo; i <= hi; i += stride) {
564
565 snprintf(num, sizeof(num), "%d", i);
566 nob = strlen(num);
567 if (nob + 1 == sizeof(num))
568 goto failed;
569
570 if (lnet_expand1tb(&pending, str, sep, sep2,
571 num, nob) != 0)
572 goto failed;
573 }
574 }
575
576 list_splice(&pending, tbs->prev);
577 return 1;
578
579 failed:
580 lnet_free_text_bufs(&pending);
581 return -1;
582}
583
584static int
585lnet_parse_hops(char *str, unsigned int *hops)
586{
587 int len = strlen(str);
588 int nob = len;
589
590 return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
591 nob == len &&
592 *hops > 0 && *hops < 256);
593}
594
595#define LNET_PRIORITY_SEPARATOR (':')
596
597static int
598lnet_parse_priority(char *str, unsigned int *priority, char **token)
599{
600 int nob;
601 char *sep;
602 int len;
603
604 sep = strchr(str, LNET_PRIORITY_SEPARATOR);
605 if (sep == NULL) {
606 *priority = 0;
607 return 0;
608 }
609 len = strlen(sep + 1);
610
611 if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
612
613
614 *token += sep - str + 1;
615 return -1;
616 }
617
618 CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
619
620
621
622
623 *sep = '\0';
624 return 0;
625}
626
627static int
628lnet_parse_route(char *str, int *im_a_router)
629{
630
631 static char cmd[LNET_SINGLE_TEXTBUF_NOB];
632
633 struct list_head nets;
634 struct list_head gateways;
635 struct list_head *tmp1;
636 struct list_head *tmp2;
637 __u32 net;
638 lnet_nid_t nid;
639 struct lnet_text_buf_t *ltb;
640 int rc;
641 char *sep;
642 char *token = str;
643 int ntokens = 0;
644 int myrc = -1;
645 unsigned int hops;
646 int got_hops = 0;
647 unsigned int priority = 0;
648
649 INIT_LIST_HEAD(&gateways);
650 INIT_LIST_HEAD(&nets);
651
652
653 strncpy(cmd, str, sizeof(cmd) - 1);
654 cmd[sizeof(cmd) - 1] = 0;
655
656 sep = str;
657 for (;;) {
658
659 while (isspace(*sep))
660 sep++;
661 if (*sep == 0) {
662 if (ntokens < (got_hops ? 3 : 2))
663 goto token_error;
664 break;
665 }
666
667 ntokens++;
668 token = sep++;
669
670
671 while (*sep != 0 && !isspace(*sep))
672 sep++;
673 if (*sep != 0)
674 *sep++ = 0;
675
676 if (ntokens == 1) {
677 tmp2 = &nets;
678 } else if (ntokens == 2 &&
679 lnet_parse_hops(token, &hops)) {
680 got_hops = 1;
681 continue;
682 } else {
683 tmp2 = &gateways;
684 }
685
686 ltb = lnet_new_text_buf(strlen(token));
687 if (ltb == NULL)
688 goto out;
689
690 strcpy(ltb->ltb_text, token);
691 tmp1 = <b->ltb_list;
692 list_add_tail(tmp1, tmp2);
693
694 while (tmp1 != tmp2) {
695 ltb = list_entry(tmp1, struct lnet_text_buf_t,
696 ltb_list);
697
698 rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
699 if (rc < 0)
700 goto token_error;
701
702 tmp1 = tmp1->next;
703
704 if (rc > 0) {
705 list_del(<b->ltb_list);
706 lnet_free_text_buf(ltb);
707 continue;
708 }
709
710 if (ntokens == 1) {
711 net = libcfs_str2net(ltb->ltb_text);
712 if (net == LNET_NIDNET(LNET_NID_ANY) ||
713 LNET_NETTYP(net) == LOLND)
714 goto token_error;
715 } else {
716 rc = lnet_parse_priority(ltb->ltb_text,
717 &priority, &token);
718 if (rc < 0)
719 goto token_error;
720
721 nid = libcfs_str2nid(ltb->ltb_text);
722 if (nid == LNET_NID_ANY ||
723 LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
724 goto token_error;
725 }
726 }
727 }
728
729 if (!got_hops)
730 hops = 1;
731
732 LASSERT(!list_empty(&nets));
733 LASSERT(!list_empty(&gateways));
734
735 list_for_each(tmp1, &nets) {
736 ltb = list_entry(tmp1, struct lnet_text_buf_t, ltb_list);
737 net = libcfs_str2net(ltb->ltb_text);
738 LASSERT(net != LNET_NIDNET(LNET_NID_ANY));
739
740 list_for_each(tmp2, &gateways) {
741 ltb = list_entry(tmp2, struct lnet_text_buf_t,
742 ltb_list);
743 nid = libcfs_str2nid(ltb->ltb_text);
744 LASSERT(nid != LNET_NID_ANY);
745
746 if (lnet_islocalnid(nid)) {
747 *im_a_router = 1;
748 continue;
749 }
750
751 rc = lnet_add_route(net, hops, nid, priority);
752 if (rc != 0) {
753 CERROR("Can't create route to %s via %s\n",
754 libcfs_net2str(net),
755 libcfs_nid2str(nid));
756 goto out;
757 }
758 }
759 }
760
761 myrc = 0;
762 goto out;
763
764 token_error:
765 lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
766 out:
767 lnet_free_text_bufs(&nets);
768 lnet_free_text_bufs(&gateways);
769 return myrc;
770}
771
772static int
773lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
774{
775 struct lnet_text_buf_t *ltb;
776
777 while (!list_empty(tbs)) {
778 ltb = list_entry(tbs->next, struct lnet_text_buf_t, ltb_list);
779
780 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
781 lnet_free_text_bufs(tbs);
782 return -EINVAL;
783 }
784
785 list_del(<b->ltb_list);
786 lnet_free_text_buf(ltb);
787 }
788
789 return 0;
790}
791
792int
793lnet_parse_routes(char *routes, int *im_a_router)
794{
795 struct list_head tbs;
796 int rc = 0;
797
798 *im_a_router = 0;
799
800 INIT_LIST_HEAD(&tbs);
801
802 if (lnet_str2tbs_sep(&tbs, routes) < 0) {
803 CERROR("Error parsing routes\n");
804 rc = -EINVAL;
805 } else {
806 rc = lnet_parse_route_tbs(&tbs, im_a_router);
807 }
808
809 LASSERT(lnet_tbnob == 0);
810 return rc;
811}
812
813static int
814lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
815{
816 LIST_HEAD(list);
817 int rc;
818 int i;
819
820 rc = cfs_ip_addr_parse(token, len, &list);
821 if (rc != 0)
822 return rc;
823
824 for (rc = i = 0; !rc && i < nip; i++)
825 rc = cfs_ip_addr_match(ipaddrs[i], &list);
826
827 cfs_expr_list_free_list(&list);
828
829 return rc;
830}
831
832static int
833lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
834{
835 static char tokens[LNET_SINGLE_TEXTBUF_NOB];
836
837 int matched = 0;
838 int ntokens = 0;
839 int len;
840 char *net = NULL;
841 char *sep;
842 char *token;
843 int rc;
844
845 LASSERT(strlen(net_entry) < sizeof(tokens));
846
847
848 strcpy(tokens, net_entry);
849 sep = tokens;
850 for (;;) {
851
852 while (isspace(*sep))
853 sep++;
854 if (*sep == 0)
855 break;
856
857 token = sep++;
858
859
860 while (*sep != 0 && !isspace(*sep))
861 sep++;
862 if (*sep != 0)
863 *sep++ = 0;
864
865 if (ntokens++ == 0) {
866 net = token;
867 continue;
868 }
869
870 len = strlen(token);
871
872 rc = lnet_match_network_token(token, len, ipaddrs, nip);
873 if (rc < 0) {
874 lnet_syntax("ip2nets", net_entry,
875 (int)(token - tokens), len);
876 return rc;
877 }
878
879 matched |= (rc != 0);
880 }
881
882 if (!matched)
883 return 0;
884
885 strcpy(net_entry, net);
886 return 1;
887}
888
889static __u32
890lnet_netspec2net(char *netspec)
891{
892 char *bracket = strchr(netspec, '(');
893 __u32 net;
894
895 if (bracket != NULL)
896 *bracket = 0;
897
898 net = libcfs_str2net(netspec);
899
900 if (bracket != NULL)
901 *bracket = '(';
902
903 return net;
904}
905
906static int
907lnet_splitnets(char *source, struct list_head *nets)
908{
909 int offset = 0;
910 int offset2;
911 int len;
912 struct lnet_text_buf_t *tb;
913 struct lnet_text_buf_t *tb2;
914 struct list_head *t;
915 char *sep;
916 char *bracket;
917 __u32 net;
918
919 LASSERT(!list_empty(nets));
920 LASSERT(nets->next == nets->prev);
921
922 tb = list_entry(nets->next, struct lnet_text_buf_t, ltb_list);
923
924 for (;;) {
925 sep = strchr(tb->ltb_text, ',');
926 bracket = strchr(tb->ltb_text, '(');
927
928 if (sep != NULL &&
929 bracket != NULL &&
930 bracket < sep) {
931
932
933 offset2 = offset + (int)(bracket - tb->ltb_text);
934 len = strlen(bracket);
935
936 bracket = strchr(bracket + 1, ')');
937
938 if (bracket == NULL ||
939 !(bracket[1] == ',' || bracket[1] == 0)) {
940 lnet_syntax("ip2nets", source, offset2, len);
941 return -EINVAL;
942 }
943
944 sep = (bracket[1] == 0) ? NULL : bracket + 1;
945 }
946
947 if (sep != NULL)
948 *sep++ = 0;
949
950 net = lnet_netspec2net(tb->ltb_text);
951 if (net == LNET_NIDNET(LNET_NID_ANY)) {
952 lnet_syntax("ip2nets", source, offset,
953 strlen(tb->ltb_text));
954 return -EINVAL;
955 }
956
957 list_for_each(t, nets) {
958 tb2 = list_entry(t, struct lnet_text_buf_t, ltb_list);
959
960 if (tb2 == tb)
961 continue;
962
963 if (net == lnet_netspec2net(tb2->ltb_text)) {
964
965 lnet_syntax("ip2nets", source, offset,
966 strlen(tb->ltb_text));
967 return -EINVAL;
968 }
969 }
970
971 if (sep == NULL)
972 return 0;
973
974 offset += (int)(sep - tb->ltb_text);
975 tb2 = lnet_new_text_buf(strlen(sep));
976 if (tb2 == NULL)
977 return -ENOMEM;
978
979 strcpy(tb2->ltb_text, sep);
980 list_add_tail(&tb2->ltb_list, nets);
981
982 tb = tb2;
983 }
984}
985
986static int
987lnet_match_networks(char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
988{
989 static char networks[LNET_SINGLE_TEXTBUF_NOB];
990 static char source[LNET_SINGLE_TEXTBUF_NOB];
991
992 struct list_head raw_entries;
993 struct list_head matched_nets;
994 struct list_head current_nets;
995 struct list_head *t;
996 struct list_head *t2;
997 struct lnet_text_buf_t *tb;
998 struct lnet_text_buf_t *tb2;
999 __u32 net1;
1000 __u32 net2;
1001 int len;
1002 int count;
1003 int dup;
1004 int rc;
1005
1006 INIT_LIST_HEAD(&raw_entries);
1007 if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1008 CERROR("Error parsing ip2nets\n");
1009 LASSERT(lnet_tbnob == 0);
1010 return -EINVAL;
1011 }
1012
1013 INIT_LIST_HEAD(&matched_nets);
1014 INIT_LIST_HEAD(¤t_nets);
1015 networks[0] = 0;
1016 count = 0;
1017 len = 0;
1018 rc = 0;
1019
1020 while (!list_empty(&raw_entries)) {
1021 tb = list_entry(raw_entries.next, struct lnet_text_buf_t,
1022 ltb_list);
1023
1024 strncpy(source, tb->ltb_text, sizeof(source)-1);
1025 source[sizeof(source)-1] = 0;
1026
1027
1028 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1029 if (rc < 0)
1030 break;
1031
1032 list_del(&tb->ltb_list);
1033
1034 if (rc == 0) {
1035 lnet_free_text_buf(tb);
1036 continue;
1037 }
1038
1039
1040 INIT_LIST_HEAD(¤t_nets);
1041 list_add(&tb->ltb_list, ¤t_nets);
1042 rc = lnet_splitnets(source, ¤t_nets);
1043 if (rc < 0)
1044 break;
1045
1046 dup = 0;
1047 list_for_each(t, ¤t_nets) {
1048 tb = list_entry(t, struct lnet_text_buf_t, ltb_list);
1049 net1 = lnet_netspec2net(tb->ltb_text);
1050 LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1051
1052 list_for_each(t2, &matched_nets) {
1053 tb2 = list_entry(t2, struct lnet_text_buf_t,
1054 ltb_list);
1055 net2 = lnet_netspec2net(tb2->ltb_text);
1056 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1057
1058 if (net1 == net2) {
1059 dup = 1;
1060 break;
1061 }
1062 }
1063
1064 if (dup)
1065 break;
1066 }
1067
1068 if (dup) {
1069 lnet_free_text_bufs(¤t_nets);
1070 continue;
1071 }
1072
1073 list_for_each_safe(t, t2, ¤t_nets) {
1074 tb = list_entry(t, struct lnet_text_buf_t, ltb_list);
1075
1076 list_del(&tb->ltb_list);
1077 list_add_tail(&tb->ltb_list, &matched_nets);
1078
1079 len += snprintf(networks + len, sizeof(networks) - len,
1080 "%s%s", (len == 0) ? "" : ",",
1081 tb->ltb_text);
1082
1083 if (len >= sizeof(networks)) {
1084 CERROR("Too many matched networks\n");
1085 rc = -E2BIG;
1086 goto out;
1087 }
1088 }
1089
1090 count++;
1091 }
1092
1093 out:
1094 lnet_free_text_bufs(&raw_entries);
1095 lnet_free_text_bufs(&matched_nets);
1096 lnet_free_text_bufs(¤t_nets);
1097 LASSERT(lnet_tbnob == 0);
1098
1099 if (rc < 0)
1100 return rc;
1101
1102 *networksp = networks;
1103 return count;
1104}
1105
1106static void
1107lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1108{
1109 LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1110}
1111
1112static int
1113lnet_ipaddr_enumerate(__u32 **ipaddrsp)
1114{
1115 int up;
1116 __u32 netmask;
1117 __u32 *ipaddrs;
1118 __u32 *ipaddrs2;
1119 int nip;
1120 char **ifnames;
1121 int nif = lnet_ipif_enumerate(&ifnames);
1122 int i;
1123 int rc;
1124
1125 if (nif <= 0)
1126 return nif;
1127
1128 LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1129 if (ipaddrs == NULL) {
1130 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1131 lnet_ipif_free_enumeration(ifnames, nif);
1132 return -ENOMEM;
1133 }
1134
1135 for (i = nip = 0; i < nif; i++) {
1136 if (!strcmp(ifnames[i], "lo"))
1137 continue;
1138
1139 rc = lnet_ipif_query(ifnames[i], &up, &ipaddrs[nip], &netmask);
1140 if (rc != 0) {
1141 CWARN("Can't query interface %s: %d\n",
1142 ifnames[i], rc);
1143 continue;
1144 }
1145
1146 if (!up) {
1147 CWARN("Ignoring interface %s: it's down\n",
1148 ifnames[i]);
1149 continue;
1150 }
1151
1152 nip++;
1153 }
1154
1155 lnet_ipif_free_enumeration(ifnames, nif);
1156
1157 if (nip == nif) {
1158 *ipaddrsp = ipaddrs;
1159 } else {
1160 if (nip > 0) {
1161 LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1162 if (ipaddrs2 == NULL) {
1163 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1164 nip = -ENOMEM;
1165 } else {
1166 memcpy(ipaddrs2, ipaddrs,
1167 nip * sizeof(*ipaddrs));
1168 *ipaddrsp = ipaddrs2;
1169 rc = nip;
1170 }
1171 }
1172 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1173 }
1174 return nip;
1175}
1176
1177int
1178lnet_parse_ip2nets(char **networksp, char *ip2nets)
1179{
1180 __u32 *ipaddrs = NULL;
1181 int nip = lnet_ipaddr_enumerate(&ipaddrs);
1182 int rc;
1183
1184 if (nip < 0) {
1185 LCONSOLE_ERROR_MSG(0x117,
1186 "Error %d enumerating local IP interfaces for ip2nets to match\n",
1187 nip);
1188 return nip;
1189 }
1190
1191 if (nip == 0) {
1192 LCONSOLE_ERROR_MSG(0x118,
1193 "No local IP interfaces for ip2nets to match\n");
1194 return -ENOENT;
1195 }
1196
1197 rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1198 lnet_ipaddr_free_enumeration(ipaddrs, nip);
1199
1200 if (rc < 0) {
1201 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1202 return rc;
1203 }
1204
1205 if (rc == 0) {
1206 LCONSOLE_ERROR_MSG(0x11a,
1207 "ip2nets does not match any local IP interfaces\n");
1208 return -ENOENT;
1209 }
1210
1211 return 0;
1212}
1213
