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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lnet/lnet/nidstrings.c
33 * Author: Phil Schwan <phil@clusterfs.com>
36 #define DEBUG_SUBSYSTEM S_LNET
38 #include <linux/sunrpc/addr.h>
39 #include <libcfs/libcfs.h>
40 #include <uapi/linux/lnet/nidstr.h>
41 #include <lnet/lib-types.h>
43 /* max value for numeric network address */
44 #define MAX_NUMERIC_VALUE 0xffffffff
46 #define IPSTRING_LENGTH 16
48 /* CAVEAT VENDITOR! Keep the canonical string representation of nets/nids
49 * consistent in all conversion functions. Some code fragments are copied
50 * around for the sake of clarity...
53 /* CAVEAT EMPTOR! Racey temporary buffer allocation!
54 * Choose the number of nidstrings to support the MAXIMUM expected number of
55 * concurrent users. If there are more, the returned string will be volatile.
56 * NB this number must allow for a process to be descheduled for a timeslice
57 * between getting its string and using it.
60 static char libcfs_nidstrings[LNET_NIDSTR_COUNT][LNET_NIDSTR_SIZE];
61 static int libcfs_nidstring_idx;
63 static DEFINE_SPINLOCK(libcfs_nidstring_lock);
65 static struct netstrfns *libcfs_namenum2netstrfns(const char *name);
68 libcfs_next_nidstring(void)
73 spin_lock_irqsave(&libcfs_nidstring_lock, flags);
75 str = libcfs_nidstrings[libcfs_nidstring_idx++];
76 if (libcfs_nidstring_idx == ARRAY_SIZE(libcfs_nidstrings))
77 libcfs_nidstring_idx = 0;
79 spin_unlock_irqrestore(&libcfs_nidstring_lock, flags);
82 EXPORT_SYMBOL(libcfs_next_nidstring);
85 * Nid range list syntax.
88 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
89 * <nidrange> :== <addrrange> '@' <net>
90 * <addrrange> :== '*' |
93 * <ipaddr_range> :== <cfs_expr_list>.<cfs_expr_list>.<cfs_expr_list>.
95 * <cfs_expr_list> :== <number> |
97 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
98 * <range_expr> :== <number> |
99 * <number> '-' <number> |
100 * <number> '-' <number> '/' <number>
101 * <net> :== <netname> | <netname><number>
102 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
103 * "vib" | "ra" | "elan" | "mx" | "ptl"
108 * Structure to represent \<nidrange\> token of the syntax.
110 * One of this is created for each \<net\> parsed.
114 * Link to list of this structures which is built on nid range
117 struct list_head nr_link;
119 * List head for addrrange::ar_link.
121 struct list_head nr_addrranges;
123 * Flag indicating that *@<net> is found.
127 * Pointer to corresponding element of libcfs_netstrfns.
129 struct netstrfns *nr_netstrfns;
131 * Number of network. E.g. 5 if \<net\> is "elan5".
137 * Structure to represent \<addrrange\> token of the syntax.
141 * Link to nidrange::nr_addrranges.
143 struct list_head ar_link;
145 * List head for cfs_expr_list::el_list.
147 struct list_head ar_numaddr_ranges;
151 * Parses \<addrrange\> token on the syntax.
153 * Allocates struct addrrange and links to \a nidrange via
154 * (nidrange::nr_addrranges)
156 * \retval 0 if \a src parses to '*' | \<ipaddr_range\> | \<cfs_expr_list\>
157 * \retval -errno otherwise
160 parse_addrange(char *str, struct nidrange *nidrange)
162 struct addrrange *addrrange;
164 if (strcmp(str, "*") == 0) {
165 nidrange->nr_all = 1;
169 CFS_ALLOC_PTR(addrrange);
170 if (addrrange == NULL)
172 list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
173 INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
175 return nidrange->nr_netstrfns->nf_parse_addrlist(str, strlen(str),
176 &addrrange->ar_numaddr_ranges);
180 * Finds or creates struct nidrange.
182 * Checks if \a src is a valid network name, looks for corresponding
183 * nidrange on the ist of nidranges (\a nidlist), creates new struct
184 * nidrange if it is not found.
186 * \retval pointer to struct nidrange matching network specified via \a src
187 * \retval NULL if \a src does not match any network
189 static struct nidrange *
190 add_nidrange(char *str, struct list_head *nidlist)
192 struct netstrfns *nf;
197 nf = libcfs_namenum2netstrfns(str);
200 end = str + strlen(nf->nf_name);
202 /* network name only, e.g. "elan" or "tcp" */
205 /* e.g. "elan25" or "tcp23", refuse to parse if
206 * network name is not appended with decimal or
209 if (kstrtouint(end, 0, &netnum) != 0)
213 list_for_each_entry(nr, nidlist, nr_link) {
214 if (nr->nr_netstrfns != nf)
216 if (nr->nr_netnum != netnum)
224 list_add_tail(&nr->nr_link, nidlist);
225 INIT_LIST_HEAD(&nr->nr_addrranges);
226 nr->nr_netstrfns = nf;
228 nr->nr_netnum = netnum;
234 * Parses \<nidrange\> token of the syntax.
236 * \retval 0 if \a src parses to \<addrrange\> '@' \<net\>
237 * \retval -EINVAL otherwise
240 parse_nidrange(char *str, struct list_head *nidlist)
246 addrrange = strim(strsep(&str, "@"));
251 if (strchr(net, '@') != NULL || !*net)
254 nr = add_nidrange(net, nidlist);
258 if (parse_addrange(addrrange, nr) != 0)
267 * Frees addrrange structures of \a list.
269 * For each struct addrrange structure found on \a list it frees
270 * cfs_expr_list list attached to it and frees the addrrange itself.
275 free_addrranges(struct list_head *list)
277 struct addrrange *ar;
279 while ((ar = list_first_entry_or_null(list,
282 cfs_expr_list_free_list(&ar->ar_numaddr_ranges);
283 list_del(&ar->ar_link);
289 * Frees nidrange strutures of \a list.
291 * For each struct nidrange structure found on \a list it frees
292 * addrrange list attached to it and frees the nidrange itself.
297 cfs_free_nidlist(struct list_head *list)
299 struct list_head *pos, *next;
302 list_for_each_safe(pos, next, list) {
303 nr = list_entry(pos, struct nidrange, nr_link);
304 free_addrranges(&nr->nr_addrranges);
309 EXPORT_SYMBOL(cfs_free_nidlist);
312 * Parses nid range list.
314 * Parses with rigorous syntax and overflow checking \a str into
315 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
316 * structures and links that structure to \a nidlist. The resulting
317 * list can be used to match a NID againts set of NIDS defined by \a
321 * \retval 0 on success
322 * \retval -errno otherwise (-ENOMEM or -EINVAL)
325 cfs_parse_nidlist(char *orig, struct list_head *nidlist)
330 orig = kstrdup(orig, GFP_KERNEL);
334 INIT_LIST_HEAD(nidlist);
336 while (rc == 0 && str) {
337 char *tok = strsep(&str, " ");
340 rc = parse_nidrange(tok, nidlist);
344 cfs_free_nidlist(nidlist);
345 else if (list_empty(nidlist))
349 EXPORT_SYMBOL(cfs_parse_nidlist);
352 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
354 * \see cfs_parse_nidlist()
357 * \retval 0 otherwises
359 int cfs_match_nid(struct lnet_nid *nid, struct list_head *nidlist)
362 struct addrrange *ar;
364 if (!nid_is_nid4(nid))
366 list_for_each_entry(nr, nidlist, nr_link) {
367 if (nr->nr_netstrfns->nf_type != nid->nid_type)
369 if (nr->nr_netnum != be16_to_cpu(nid->nid_num))
373 list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
374 if (nr->nr_netstrfns->nf_match_addr(
375 be32_to_cpu(nid->nid_addr[0]),
376 &ar->ar_numaddr_ranges))
381 EXPORT_SYMBOL(cfs_match_nid);
384 * Print the network part of the nidrange \a nr into the specified \a buffer.
386 * \retval number of characters written
389 cfs_print_network(char *buffer, int count, struct nidrange *nr)
391 struct netstrfns *nf = nr->nr_netstrfns;
393 if (nr->nr_netnum == 0)
394 return scnprintf(buffer, count, "@%s", nf->nf_name);
396 return scnprintf(buffer, count, "@%s%u",
397 nf->nf_name, nr->nr_netnum);
401 * Print a list of addrrange (\a addrranges) into the specified \a buffer.
402 * At max \a count characters can be printed into \a buffer.
404 * \retval number of characters written
407 cfs_print_addrranges(char *buffer, int count, struct list_head *addrranges,
411 struct addrrange *ar;
412 struct netstrfns *nf = nr->nr_netstrfns;
414 list_for_each_entry(ar, addrranges, ar_link) {
416 i += scnprintf(buffer + i, count - i, " ");
417 i += nf->nf_print_addrlist(buffer + i, count - i,
418 &ar->ar_numaddr_ranges);
419 i += cfs_print_network(buffer + i, count - i, nr);
425 * Print a list of nidranges (\a nidlist) into the specified \a buffer.
426 * At max \a count characters can be printed into \a buffer.
427 * Nidranges are separated by a space character.
429 * \retval number of characters written
431 int cfs_print_nidlist(char *buffer, int count, struct list_head *nidlist)
439 list_for_each_entry(nr, nidlist, nr_link) {
441 i += scnprintf(buffer + i, count - i, " ");
443 if (nr->nr_all != 0) {
444 LASSERT(list_empty(&nr->nr_addrranges));
445 i += scnprintf(buffer + i, count - i, "*");
446 i += cfs_print_network(buffer + i, count - i, nr);
448 i += cfs_print_addrranges(buffer + i, count - i,
449 &nr->nr_addrranges, nr);
454 EXPORT_SYMBOL(cfs_print_nidlist);
457 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
464 libcfs_ip_addr2str(__u32 addr, char *str, size_t size)
466 snprintf(str, size, "%u.%u.%u.%u",
467 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
468 (addr >> 8) & 0xff, addr & 0xff);
472 libcfs_ip_addr2str_size(const __be32 *addr, size_t asize,
473 char *str, size_t size)
475 struct sockaddr_storage sa = {};
479 sa.ss_family = AF_INET;
480 memcpy(&((struct sockaddr_in *)(&sa))->sin_addr.s_addr,
484 sa.ss_family = AF_INET6;
485 memcpy(&((struct sockaddr_in6 *)(&sa))->sin6_addr.s6_addr,
492 rpc_ntop((struct sockaddr *)&sa, str, size);
495 /* CAVEAT EMPTOR XscanfX
496 * I use "%n" at the end of a sscanf format to detect trailing junk. However
497 * sscanf may return immediately if it sees the terminating '0' in a string, so
498 * I initialise the %n variable to the expected length. If sscanf sets it;
499 * fine, if it doesn't, then the scan ended at the end of the string, which is
502 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
508 int n = nob; /* XscanfX */
511 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
513 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
514 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
515 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
522 libcfs_ip_str2addr_size(const char *str, int nob,
523 __be32 *addr, size_t *alen)
525 struct sockaddr_storage sa;
527 /* Note: 'net' arg to rpc_pton is only needed for link-local
528 * addresses. Such addresses would not work with LNet routing,
529 * so we can assume they aren't used. So it doesn't matter
530 * which net namespace is passed.
532 if (rpc_pton(&init_net, str, nob,
533 (struct sockaddr *)&sa, sizeof(sa)) == 0)
535 if (sa.ss_family == AF_INET6) {
537 &((struct sockaddr_in6 *)(&sa))->sin6_addr.s6_addr,
542 if (sa.ss_family == AF_INET) {
544 &((struct sockaddr_in *)(&sa))->sin_addr.s_addr,
553 /* Used by lnet/config.c so it can't be static */
555 cfs_ip_addr_parse(char *str, int len, struct list_head *list)
557 struct cfs_expr_list *el;
566 while (src.ls_str != NULL) {
569 if (!cfs_gettok(&src, '.', &res)) {
574 rc = cfs_expr_list_parse(res.ls_str, res.ls_len, 0, 255, &el);
578 list_add_tail(&el->el_link, list);
587 cfs_expr_list_free_list(list);
593 * Print the range expression \a re into specified \a buffer.
594 * If \a bracketed is true, expression does not need additional
597 * \retval number of characters written
600 cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
610 if (expr->re_lo == expr->re_hi)
611 i = scnprintf(buffer, count, "%u", expr->re_lo);
612 else if (expr->re_stride == 1)
613 i = scnprintf(buffer, count, "%s%u-%u%s",
614 s, expr->re_lo, expr->re_hi, e);
616 i = scnprintf(buffer, count, "%s%u-%u/%u%s",
617 s, expr->re_lo, expr->re_hi,
623 * Print a list of range expressions (\a expr_list) into specified \a buffer.
624 * If the list contains several expressions, separate them with comma
625 * and surround the list with brackets.
627 * \retval number of characters written
630 cfs_expr_list_print(char *buffer, int count, struct cfs_expr_list *expr_list)
632 struct cfs_range_expr *expr;
639 list_for_each_entry(expr, &expr_list->el_exprs, re_link)
643 i += scnprintf(buffer + i, count - i, "[");
645 list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
647 i += scnprintf(buffer + i, count - i, ",");
648 i += cfs_range_expr_print(buffer + i, count - i, expr,
653 i += scnprintf(buffer + i, count - i, "]");
659 libcfs_ip_addr_range_print(char *buffer, int count, struct list_head *list)
662 struct cfs_expr_list *el;
664 list_for_each_entry(el, list, el_link) {
667 i += scnprintf(buffer + i, count - i, ".");
668 i += cfs_expr_list_print(buffer + i, count - i, el);
674 * Matches address (\a addr) against address set encoded in \a list.
676 * \retval 1 if \a addr matches
677 * \retval 0 otherwise
680 cfs_ip_addr_match(__u32 addr, struct list_head *list)
682 struct cfs_expr_list *el;
685 list_for_each_entry_reverse(el, list, el_link) {
686 if (!cfs_expr_list_match(addr & 0xff, el))
696 * Print the network part of the nidrange \a nr into the specified \a buffer.
698 * \retval number of characters written
701 libcfs_decnum_addr2str(__u32 addr, char *str, size_t size)
703 snprintf(str, size, "%u", addr);
707 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
712 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
716 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
720 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
727 * Nf_parse_addrlist method for networks using numeric addresses.
729 * Examples of such networks are gm and elan.
731 * \retval 0 if \a str parsed to numeric address
732 * \retval errno otherwise
735 libcfs_num_parse(char *str, int len, struct list_head *list)
737 struct cfs_expr_list *el;
740 rc = cfs_expr_list_parse(str, len, 0, MAX_NUMERIC_VALUE, &el);
742 list_add_tail(&el->el_link, list);
748 libcfs_num_addr_range_print(char *buffer, int count, struct list_head *list)
751 struct cfs_expr_list *el;
753 list_for_each_entry(el, list, el_link) {
755 i += cfs_expr_list_print(buffer + i, count - i, el);
761 * Nf_match_addr method for networks using numeric addresses
764 * \retval 0 otherwise
767 libcfs_num_match(__u32 addr, struct list_head *numaddr)
769 struct cfs_expr_list *el;
771 LASSERT(!list_empty(numaddr));
772 el = list_first_entry(numaddr, struct cfs_expr_list, el_link);
774 return cfs_expr_list_match(addr, el);
777 static struct netstrfns libcfs_netstrfns[] = {
780 .nf_modname = "klolnd",
781 .nf_addr2str = libcfs_decnum_addr2str,
782 .nf_str2addr = libcfs_lo_str2addr,
783 .nf_parse_addrlist = libcfs_num_parse,
784 .nf_print_addrlist = libcfs_num_addr_range_print,
785 .nf_match_addr = libcfs_num_match
787 { .nf_type = SOCKLND,
789 .nf_modname = "ksocklnd",
790 .nf_addr2str = libcfs_ip_addr2str,
791 .nf_addr2str_size = libcfs_ip_addr2str_size,
792 .nf_str2addr = libcfs_ip_str2addr,
793 .nf_str2addr_size = libcfs_ip_str2addr_size,
794 .nf_parse_addrlist = cfs_ip_addr_parse,
795 .nf_print_addrlist = libcfs_ip_addr_range_print,
796 .nf_match_addr = cfs_ip_addr_match
798 { .nf_type = O2IBLND,
800 .nf_modname = "ko2iblnd",
801 .nf_addr2str = libcfs_ip_addr2str,
802 .nf_str2addr = libcfs_ip_str2addr,
803 .nf_parse_addrlist = cfs_ip_addr_parse,
804 .nf_print_addrlist = libcfs_ip_addr_range_print,
805 .nf_match_addr = cfs_ip_addr_match
809 .nf_modname = "kgnilnd",
810 .nf_addr2str = libcfs_decnum_addr2str,
811 .nf_str2addr = libcfs_num_str2addr,
812 .nf_parse_addrlist = libcfs_num_parse,
813 .nf_print_addrlist = libcfs_num_addr_range_print,
814 .nf_match_addr = libcfs_num_match
816 { .nf_type = GNIIPLND,
818 .nf_modname = "kgnilnd",
819 .nf_addr2str = libcfs_ip_addr2str,
820 .nf_str2addr = libcfs_ip_str2addr,
821 .nf_parse_addrlist = cfs_ip_addr_parse,
822 .nf_print_addrlist = libcfs_ip_addr_range_print,
823 .nf_match_addr = cfs_ip_addr_match
825 { .nf_type = PTL4LND,
827 .nf_modname = "kptl4lnd",
828 .nf_addr2str = libcfs_decnum_addr2str,
829 .nf_str2addr = libcfs_num_str2addr,
830 .nf_parse_addrlist = libcfs_num_parse,
831 .nf_print_addrlist = libcfs_num_addr_range_print,
832 .nf_match_addr = libcfs_num_match
837 .nf_modname = "kkfilnd",
838 .nf_addr2str = libcfs_decnum_addr2str,
839 .nf_str2addr = libcfs_num_str2addr,
840 .nf_parse_addrlist = libcfs_num_parse,
841 .nf_print_addrlist = libcfs_num_addr_range_print,
842 .nf_match_addr = libcfs_num_match
846 static const size_t libcfs_nnetstrfns = ARRAY_SIZE(libcfs_netstrfns);
848 static struct netstrfns *
849 type2net_info(__u32 net_type)
853 for (i = 0; i < libcfs_nnetstrfns; i++) {
854 if (libcfs_netstrfns[i].nf_type == net_type)
855 return &libcfs_netstrfns[i];
862 cfs_match_net(__u32 net_id, __u32 net_type, struct list_head *net_num_list)
869 if (net_type != LNET_NETTYP(net_id))
872 net_num = LNET_NETNUM(net_id);
874 /* if there is a net number but the list passed in is empty, then
877 if (!net_num && list_empty(net_num_list))
879 else if (list_empty(net_num_list))
882 if (!libcfs_num_match(net_num, net_num_list))
889 cfs_match_nid_net(struct lnet_nid *nid, __u32 net_type,
890 struct list_head *net_num_list,
891 struct list_head *addr)
894 struct netstrfns *nf;
896 if (!addr || list_empty(addr) || !net_num_list)
899 nf = type2net_info(LNET_NETTYP(LNET_NID_NET(nid)));
903 /* FIXME handle long-addr nid */
904 address = LNET_NIDADDR(lnet_nid_to_nid4(nid));
906 /* if either the address or net number don't match then no match */
907 if (!nf->nf_match_addr(address, addr) ||
908 !cfs_match_net(LNET_NID_NET(nid), net_type, net_num_list))
913 EXPORT_SYMBOL(cfs_match_nid_net);
915 static struct netstrfns *
916 libcfs_lnd2netstrfns(__u32 lnd)
920 for (i = 0; i < libcfs_nnetstrfns; i++)
921 if (lnd == libcfs_netstrfns[i].nf_type)
922 return &libcfs_netstrfns[i];
927 static struct netstrfns *
928 libcfs_namenum2netstrfns(const char *name)
930 struct netstrfns *nf;
933 for (i = 0; i < libcfs_nnetstrfns; i++) {
934 nf = &libcfs_netstrfns[i];
935 if (!strncmp(name, nf->nf_name, strlen(nf->nf_name)))
941 static struct netstrfns *
942 libcfs_name2netstrfns(const char *name)
946 for (i = 0; i < libcfs_nnetstrfns; i++)
947 if (!strcmp(libcfs_netstrfns[i].nf_name, name))
948 return &libcfs_netstrfns[i];
954 libcfs_isknown_lnd(__u32 lnd)
956 return libcfs_lnd2netstrfns(lnd) != NULL;
958 EXPORT_SYMBOL(libcfs_isknown_lnd);
961 libcfs_lnd2modname(__u32 lnd)
963 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
965 return (nf == NULL) ? NULL : nf->nf_modname;
967 EXPORT_SYMBOL(libcfs_lnd2modname);
970 libcfs_str2lnd(const char *str)
972 struct netstrfns *nf = libcfs_name2netstrfns(str);
979 EXPORT_SYMBOL(libcfs_str2lnd);
982 libcfs_lnd2str_r(__u32 lnd, char *buf, size_t buf_size)
984 struct netstrfns *nf;
986 nf = libcfs_lnd2netstrfns(lnd);
988 snprintf(buf, buf_size, "?%u?", lnd);
990 snprintf(buf, buf_size, "%s", nf->nf_name);
994 EXPORT_SYMBOL(libcfs_lnd2str_r);
997 libcfs_net2str_r(__u32 net, char *buf, size_t buf_size)
999 __u32 nnum = LNET_NETNUM(net);
1000 __u32 lnd = LNET_NETTYP(net);
1001 struct netstrfns *nf;
1003 nf = libcfs_lnd2netstrfns(lnd);
1005 snprintf(buf, buf_size, "<%u:%u>", lnd, nnum);
1007 snprintf(buf, buf_size, "%s", nf->nf_name);
1009 snprintf(buf, buf_size, "%s%u", nf->nf_name, nnum);
1013 EXPORT_SYMBOL(libcfs_net2str_r);
1016 libcfs_nid2str_r(lnet_nid_t nid, char *buf, size_t buf_size)
1018 __u32 addr = LNET_NIDADDR(nid);
1019 __u32 net = LNET_NIDNET(nid);
1020 __u32 nnum = LNET_NETNUM(net);
1021 __u32 lnd = LNET_NETTYP(net);
1022 struct netstrfns *nf;
1024 if (nid == LNET_NID_ANY) {
1025 strncpy(buf, "<?>", buf_size);
1026 buf[buf_size - 1] = '\0';
1030 nf = libcfs_lnd2netstrfns(lnd);
1032 snprintf(buf, buf_size, "%x@<%u:%u>", addr, lnd, nnum);
1036 nf->nf_addr2str(addr, buf, buf_size);
1037 addr_len = strlen(buf);
1039 snprintf(buf + addr_len, buf_size - addr_len, "@%s",
1042 snprintf(buf + addr_len, buf_size - addr_len, "@%s%u",
1048 EXPORT_SYMBOL(libcfs_nid2str_r);
1051 libcfs_nidstr_r(const struct lnet_nid *nid, char *buf, size_t buf_size)
1055 struct netstrfns *nf;
1057 if (LNET_NID_IS_ANY(nid)) {
1058 strncpy(buf, "<?>", buf_size);
1059 buf[buf_size - 1] = '\0';
1063 nnum = be16_to_cpu(nid->nid_num);
1064 lnd = nid->nid_type;
1065 nf = libcfs_lnd2netstrfns(lnd);
1069 if (nf->nf_addr2str_size)
1070 nf->nf_addr2str_size(nid->nid_addr, NID_ADDR_BYTES(nid),
1073 nf->nf_addr2str(ntohl(nid->nid_addr[0]), buf, buf_size);
1074 addr_len = strlen(buf);
1076 snprintf(buf + addr_len, buf_size - addr_len, "@%s",
1079 snprintf(buf + addr_len, buf_size - addr_len, "@%s%u",
1083 int words = DIV_ROUND_UP(NID_ADDR_BYTES(nid), 4);
1086 for (i = 0; i < words && i < 4; i++)
1087 l = snprintf(buf+l, buf_size-l, "%s%x",
1088 i ? ":" : "", ntohl(nid->nid_addr[i]));
1089 snprintf(buf+l, buf_size-l, "@<%u:%u>", lnd, nnum);
1094 EXPORT_SYMBOL(libcfs_nidstr_r);
1096 static struct netstrfns *
1097 libcfs_str2net_internal(const char *str, __u32 *net)
1099 struct netstrfns *nf = NULL;
1101 unsigned int netnum;
1104 for (i = 0; i < libcfs_nnetstrfns; i++) {
1105 nf = &libcfs_netstrfns[i];
1106 if (!strncmp(str, nf->nf_name, strlen(nf->nf_name)))
1110 if (i == libcfs_nnetstrfns)
1113 nob = strlen(nf->nf_name);
1115 if (strlen(str) == (unsigned int)nob) {
1118 if (nf->nf_type == LOLND) /* net number not allowed */
1123 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
1124 i != (int)strlen(str))
1128 *net = LNET_MKNET(nf->nf_type, netnum);
1133 libcfs_str2net(const char *str)
1137 if (libcfs_str2net_internal(str, &net) != NULL)
1140 return LNET_NET_ANY;
1142 EXPORT_SYMBOL(libcfs_str2net);
1145 libcfs_str2nid(const char *str)
1147 const char *sep = strchr(str, '@');
1148 struct netstrfns *nf;
1153 nf = libcfs_str2net_internal(sep + 1, &net);
1155 return LNET_NID_ANY;
1157 sep = str + strlen(str);
1158 net = LNET_MKNET(SOCKLND, 0);
1159 nf = libcfs_lnd2netstrfns(SOCKLND);
1160 LASSERT(nf != NULL);
1163 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
1164 return LNET_NID_ANY;
1166 return LNET_MKNID(net, addr);
1168 EXPORT_SYMBOL(libcfs_str2nid);
1171 libcfs_strnid(struct lnet_nid *nid, const char *str)
1173 const char *sep = strchr(str, '@');
1174 struct netstrfns *nf;
1178 nf = libcfs_str2net_internal(sep + 1, &net);
1182 sep = str + strlen(str);
1183 net = LNET_MKNET(SOCKLND, 0);
1184 nf = libcfs_lnd2netstrfns(SOCKLND);
1185 LASSERT(nf != NULL);
1188 memset(nid, 0, sizeof(*nid));
1189 nid->nid_type = LNET_NETTYP(net);
1190 nid->nid_num = htons(LNET_NETNUM(net));
1191 if (nf->nf_str2addr_size) {
1194 if (!nf->nf_str2addr_size(str, (int)(sep - str),
1195 nid->nid_addr, &asize))
1197 nid->nid_size = asize - 4;
1201 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
1203 nid->nid_addr[0] = htonl(addr);
1208 EXPORT_SYMBOL(libcfs_strnid);
1211 libcfs_id2str(struct lnet_process_id id)
1213 char *str = libcfs_next_nidstring();
1215 if (id.pid == LNET_PID_ANY) {
1216 snprintf(str, LNET_NIDSTR_SIZE,
1217 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
1221 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
1222 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
1223 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
1226 EXPORT_SYMBOL(libcfs_id2str);
1229 libcfs_idstr(struct lnet_processid *id)
1231 char *str = libcfs_next_nidstring();
1233 if (id->pid == LNET_PID_ANY) {
1234 snprintf(str, LNET_NIDSTR_SIZE,
1235 "LNET_PID_ANY-%s", libcfs_nidstr(&id->nid));
1239 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
1240 ((id->pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
1241 (id->pid & ~LNET_PID_USERFLAG), libcfs_nidstr(&id->nid));
1244 EXPORT_SYMBOL(libcfs_idstr);
1247 libcfs_strid(struct lnet_processid *id, const char *str)
1249 char *tmp = strchr(str, '-');
1251 id->pid = LNET_PID_LUSTRE;
1253 strncmp("LNET_PID_ANY-", str, tmp - str) != 0) {
1254 char pid[LNET_NIDSTR_SIZE];
1257 strscpy(pid, str, tmp - str);
1258 rc = kstrtou32(pid, 10, &id->pid);
1266 return libcfs_strnid(&id->nid, tmp);
1268 EXPORT_SYMBOL(libcfs_strid);
1271 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
1273 if (!strcmp(str, "*")) {
1274 *nidp = LNET_NID_ANY;
1278 *nidp = libcfs_str2nid(str);
1279 return *nidp != LNET_NID_ANY;
1281 EXPORT_SYMBOL(libcfs_str2anynid);