1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/libcfs/nidstrings.c
38 * Author: Phil Schwan <phil@clusterfs.com>
42 # define EXPORT_SYMTAB
45 #define DEBUG_SUBSYSTEM S_LNET
47 #include <libcfs/libcfs.h>
48 #include <lnet/lnet.h>
50 #ifdef HAVE_GETHOSTBYNAME
55 /* CAVEAT VENDITOR! Keep the canonical string representation of nets/nids
56 * consistent in all conversion functions. Some code fragments are copied
57 * around for the sake of clarity...
60 /* CAVEAT EMPTOR! Racey temporary buffer allocation!
61 * Choose the number of nidstrings to support the MAXIMUM expected number of
62 * concurrent users. If there are more, the returned string will be volatile.
63 * NB this number must allow for a process to be descheduled for a timeslice
64 * between getting its string and using it.
67 #define LNET_NIDSTR_COUNT 128 /* # of nidstrings */
68 #define LNET_NIDSTR_SIZE 32 /* size of each one (see below for usage) */
70 static char libcfs_nidstrings[LNET_NIDSTR_COUNT][LNET_NIDSTR_SIZE];
71 static int libcfs_nidstring_idx = 0;
74 static cfs_spinlock_t libcfs_nidstring_lock;
76 void libcfs_init_nidstrings (void)
78 cfs_spin_lock_init(&libcfs_nidstring_lock);
81 # define NIDSTR_LOCK(f) cfs_spin_lock_irqsave(&libcfs_nidstring_lock, f)
82 # define NIDSTR_UNLOCK(f) cfs_spin_unlock_irqrestore(&libcfs_nidstring_lock, f)
84 # define NIDSTR_LOCK(f) (f=0) /* avoid unused var warnings */
85 # define NIDSTR_UNLOCK(f) (f=0)
89 libcfs_next_nidstring (void)
96 str = libcfs_nidstrings[libcfs_nidstring_idx++];
97 if (libcfs_nidstring_idx ==
98 sizeof(libcfs_nidstrings)/sizeof(libcfs_nidstrings[0]))
99 libcfs_nidstring_idx = 0;
101 NIDSTR_UNLOCK(flags);
105 static int libcfs_lo_str2addr(const char *str, int nob, __u32 *addr);
106 static void libcfs_ip_addr2str(__u32 addr, char *str);
107 static int libcfs_ip_str2addr(const char *str, int nob, __u32 *addr);
108 static void libcfs_decnum_addr2str(__u32 addr, char *str);
109 static void libcfs_hexnum_addr2str(__u32 addr, char *str);
110 static int libcfs_num_str2addr(const char *str, int nob, __u32 *addr);
111 static int libcfs_ip_parse(char *str, int len, cfs_list_t *list);
112 static int libcfs_num_parse(char *str, int len, cfs_list_t *list);
113 static int libcfs_ip_match(__u32 addr, cfs_list_t *list);
114 static int libcfs_num_match(__u32 addr, cfs_list_t *list);
120 void (*nf_addr2str)(__u32 addr, char *str);
121 int (*nf_str2addr)(const char *str, int nob, __u32 *addr);
122 int (*nf_parse_addrlist)(char *str, int len,
124 int (*nf_match_addr)(__u32 addr, cfs_list_t *list);
127 static struct netstrfns libcfs_netstrfns[] = {
128 {/* .nf_type */ LOLND,
130 /* .nf_modname */ "klolnd",
131 /* .nf_addr2str */ libcfs_decnum_addr2str,
132 /* .nf_str2addr */ libcfs_lo_str2addr,
133 /* .nf_parse_addr*/ libcfs_num_parse,
134 /* .nf_match_addr*/ libcfs_num_match},
135 {/* .nf_type */ SOCKLND,
136 /* .nf_name */ "tcp",
137 /* .nf_modname */ "ksocklnd",
138 /* .nf_addr2str */ libcfs_ip_addr2str,
139 /* .nf_str2addr */ libcfs_ip_str2addr,
140 /* .nf_parse_addrlist*/ libcfs_ip_parse,
141 /* .nf_match_addr*/ libcfs_ip_match},
142 {/* .nf_type */ O2IBLND,
143 /* .nf_name */ "o2ib",
144 /* .nf_modname */ "ko2iblnd",
145 /* .nf_addr2str */ libcfs_ip_addr2str,
146 /* .nf_str2addr */ libcfs_ip_str2addr,
147 /* .nf_parse_addrlist*/ libcfs_ip_parse,
148 /* .nf_match_addr*/ libcfs_ip_match},
149 {/* .nf_type */ CIBLND,
150 /* .nf_name */ "cib",
151 /* .nf_modname */ "kciblnd",
152 /* .nf_addr2str */ libcfs_ip_addr2str,
153 /* .nf_str2addr */ libcfs_ip_str2addr,
154 /* .nf_parse_addrlist*/ libcfs_ip_parse,
155 /* .nf_match_addr*/ libcfs_ip_match},
156 {/* .nf_type */ OPENIBLND,
157 /* .nf_name */ "openib",
158 /* .nf_modname */ "kopeniblnd",
159 /* .nf_addr2str */ libcfs_ip_addr2str,
160 /* .nf_str2addr */ libcfs_ip_str2addr,
161 /* .nf_parse_addrlist*/ libcfs_ip_parse,
162 /* .nf_match_addr*/ libcfs_ip_match},
163 {/* .nf_type */ IIBLND,
164 /* .nf_name */ "iib",
165 /* .nf_modname */ "kiiblnd",
166 /* .nf_addr2str */ libcfs_ip_addr2str,
167 /* .nf_str2addr */ libcfs_ip_str2addr,
168 /* .nf_parse_addrlist*/ libcfs_ip_parse,
169 /* .nf_match_addr*/ libcfs_ip_match},
170 {/* .nf_type */ VIBLND,
171 /* .nf_name */ "vib",
172 /* .nf_modname */ "kviblnd",
173 /* .nf_addr2str */ libcfs_ip_addr2str,
174 /* .nf_str2addr */ libcfs_ip_str2addr,
175 /* .nf_parse_addrlist*/ libcfs_ip_parse,
176 /* .nf_match_addr*/ libcfs_ip_match},
177 {/* .nf_type */ RALND,
179 /* .nf_modname */ "kralnd",
180 /* .nf_addr2str */ libcfs_ip_addr2str,
181 /* .nf_str2addr */ libcfs_ip_str2addr,
182 /* .nf_parse_addrlist*/ libcfs_ip_parse,
183 /* .nf_match_addr*/ libcfs_ip_match},
184 {/* .nf_type */ QSWLND,
185 /* .nf_name */ "elan",
186 /* .nf_modname */ "kqswlnd",
187 /* .nf_addr2str */ libcfs_decnum_addr2str,
188 /* .nf_str2addr */ libcfs_num_str2addr,
189 /* .nf_parse_addrlist*/ libcfs_num_parse,
190 /* .nf_match_addr*/ libcfs_num_match},
191 {/* .nf_type */ GMLND,
193 /* .nf_modname */ "kgmlnd",
194 /* .nf_addr2str */ libcfs_hexnum_addr2str,
195 /* .nf_str2addr */ libcfs_num_str2addr,
196 /* .nf_parse_addrlist*/ libcfs_num_parse,
197 /* .nf_match_addr*/ libcfs_num_match},
198 {/* .nf_type */ MXLND,
200 /* .nf_modname */ "kmxlnd",
201 /* .nf_addr2str */ libcfs_ip_addr2str,
202 /* .nf_str2addr */ libcfs_ip_str2addr,
203 /* .nf_parse_addrlist*/ libcfs_ip_parse,
204 /* .nf_match_addr*/ libcfs_ip_match},
205 {/* .nf_type */ PTLLND,
206 /* .nf_name */ "ptl",
207 /* .nf_modname */ "kptllnd",
208 /* .nf_addr2str */ libcfs_decnum_addr2str,
209 /* .nf_str2addr */ libcfs_num_str2addr,
210 /* .nf_parse_addrlist*/ libcfs_num_parse,
211 /* .nf_match_addr*/ libcfs_num_match},
212 /* placeholder for net0 alias. It MUST BE THE LAST ENTRY */
216 const int libcfs_nnetstrfns = sizeof(libcfs_netstrfns)/sizeof(libcfs_netstrfns[0]);
219 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
226 libcfs_ip_addr2str(__u32 addr, char *str)
228 #if 0 /* never lookup */
229 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
230 __u32 netip = htonl(addr);
231 struct hostent *he = gethostbyaddr(&netip, sizeof(netip), AF_INET);
234 snprintf(str, LNET_NIDSTR_SIZE, "%s", he->h_name);
239 snprintf(str, LNET_NIDSTR_SIZE, "%u.%u.%u.%u",
240 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
241 (addr >> 8) & 0xff, addr & 0xff);
244 /* CAVEAT EMPTOR XscanfX
245 * I use "%n" at the end of a sscanf format to detect trailing junk. However
246 * sscanf may return immediately if it sees the terminating '0' in a string, so
247 * I initialise the %n variable to the expected length. If sscanf sets it;
248 * fine, if it doesn't, then the scan ended at the end of the string, which is
252 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
258 int n = nob; /* XscanfX */
261 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
263 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
264 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
265 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
269 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
270 /* known hostname? */
271 if (('a' <= str[0] && str[0] <= 'z') ||
272 ('A' <= str[0] && str[0] <= 'Z')) {
275 LIBCFS_ALLOC(tmp, nob + 1);
279 memcpy(tmp, str, nob);
282 he = gethostbyname(tmp);
284 LIBCFS_FREE(tmp, nob);
287 __u32 ip = *(__u32 *)he->h_addr;
299 libcfs_decnum_addr2str(__u32 addr, char *str)
301 snprintf(str, LNET_NIDSTR_SIZE, "%u", addr);
305 libcfs_hexnum_addr2str(__u32 addr, char *str)
307 snprintf(str, LNET_NIDSTR_SIZE, "0x%x", addr);
311 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
316 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
320 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
324 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
331 libcfs_lnd2netstrfns(int lnd)
336 for (i = 0; i < libcfs_nnetstrfns; i++)
337 if (lnd == libcfs_netstrfns[i].nf_type)
338 return &libcfs_netstrfns[i];
344 libcfs_namenum2netstrfns(const char *name)
346 struct netstrfns *nf;
349 for (i = 0; i < libcfs_nnetstrfns; i++) {
350 nf = &libcfs_netstrfns[i];
351 if (nf->nf_type >= 0 &&
352 !strncmp(name, nf->nf_name, strlen(nf->nf_name)))
359 libcfs_name2netstrfns(const char *name)
363 for (i = 0; i < libcfs_nnetstrfns; i++)
364 if (libcfs_netstrfns[i].nf_type >= 0 &&
365 !strcmp(libcfs_netstrfns[i].nf_name, name))
366 return &libcfs_netstrfns[i];
372 libcfs_isknown_lnd(int type)
374 return libcfs_lnd2netstrfns(type) != NULL;
378 libcfs_lnd2modname(int lnd)
380 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
382 return (nf == NULL) ? NULL : nf->nf_modname;
386 libcfs_lnd2str(int lnd)
389 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
394 str = libcfs_next_nidstring();
395 snprintf(str, LNET_NIDSTR_SIZE, "?%u?", lnd);
400 libcfs_str2lnd(const char *str)
402 struct netstrfns *nf = libcfs_name2netstrfns(str);
411 libcfs_net2str(__u32 net)
413 int lnd = LNET_NETTYP(net);
414 int num = LNET_NETNUM(net);
415 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
416 char *str = libcfs_next_nidstring();
419 snprintf(str, LNET_NIDSTR_SIZE, "<%u:%u>", lnd, num);
421 snprintf(str, LNET_NIDSTR_SIZE, "%s", nf->nf_name);
423 snprintf(str, LNET_NIDSTR_SIZE, "%s%u", nf->nf_name, num);
429 libcfs_nid2str(lnet_nid_t nid)
431 __u32 addr = LNET_NIDADDR(nid);
432 __u32 net = LNET_NIDNET(nid);
433 int lnd = LNET_NETTYP(net);
434 int nnum = LNET_NETNUM(net);
435 struct netstrfns *nf;
439 if (nid == LNET_NID_ANY)
440 return "LNET_NID_ANY";
442 nf = libcfs_lnd2netstrfns(lnd);
443 str = libcfs_next_nidstring();
446 snprintf(str, LNET_NIDSTR_SIZE, "%x@<%u:%u>", addr, lnd, nnum);
448 nf->nf_addr2str(addr, str);
451 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s",
454 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s%u",
461 static struct netstrfns *
462 libcfs_str2net_internal(const char *str, __u32 *net)
464 struct netstrfns *nf;
469 for (i = 0; i < libcfs_nnetstrfns; i++) {
470 nf = &libcfs_netstrfns[i];
471 if (nf->nf_type >= 0 &&
472 !strncmp(str, nf->nf_name, strlen(nf->nf_name)))
476 if (i == libcfs_nnetstrfns)
479 nob = strlen(nf->nf_name);
481 if (strlen(str) == (unsigned int)nob) {
484 if (nf->nf_type == LOLND) /* net number not allowed */
489 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
490 i != (int)strlen(str))
494 *net = LNET_MKNET(nf->nf_type, netnum);
499 libcfs_str2net(const char *str)
503 if (libcfs_str2net_internal(str, &net) != NULL)
506 return LNET_NIDNET(LNET_NID_ANY);
510 libcfs_str2nid(const char *str)
512 const char *sep = strchr(str, '@');
513 struct netstrfns *nf;
518 nf = libcfs_str2net_internal(sep + 1, &net);
522 sep = str + strlen(str);
523 net = LNET_MKNET(SOCKLND, 0);
524 nf = libcfs_lnd2netstrfns(SOCKLND);
525 LASSERT (nf != NULL);
528 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
531 return LNET_MKNID(net, addr);
535 libcfs_id2str(lnet_process_id_t id)
537 char *str = libcfs_next_nidstring();
539 if (id.pid == LNET_PID_ANY) {
540 snprintf(str, LNET_NIDSTR_SIZE,
541 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
545 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
546 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
547 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
552 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
554 if (!strcmp(str, "*")) {
555 *nidp = LNET_NID_ANY;
559 *nidp = libcfs_str2nid(str);
560 return *nidp != LNET_NID_ANY;
564 * Nid range list syntax.
567 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
568 * <nidrange> :== <addrrange> '@' <net>
569 * <addrrange> :== '*' |
572 * <ipaddr_range> :== <numaddr_range>.<numaddr_range>.<numaddr_range>.
574 * <numaddr_range> :== <number> |
576 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
577 * <range_expr> :== <number> |
578 * <number> '-' <number> |
579 * <number> '-' <number> '/' <number>
580 * <net> :== <netname> | <netname><number>
581 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
582 * "vib" | "ra" | "elan" | "gm" | "mx" | "ptl"
587 * Structure to represent NULL-less strings.
595 * Structure to represent \<nidrange\> token of the syntax.
597 * One of this is created for each \<net\> parsed.
601 * Link to list of this structures which is built on nid range
606 * List head for addrrange::ar_link.
608 cfs_list_t nr_addrranges;
610 * Flag indicating that *@<net> is found.
614 * Pointer to corresponding element of libcfs_netstrfns.
616 struct netstrfns *nr_netstrfns;
618 * Number of network. E.g. 5 if \<net\> is "elan5".
624 * Structure to represent \<addrrange\> token of the syntax.
628 * Link to nidrange::nr_addrranges.
632 * List head for numaddr_range::nar_link.
634 cfs_list_t ar_numaddr_ranges;
638 * Structure to represent \<numaddr_range\> token of the syntax.
640 struct numaddr_range {
642 * Link to addrrange::ar_numaddr_ranges.
646 * List head for range_expr::re_link.
648 cfs_list_t nar_range_exprs;
652 * Structure to represent \<range_expr\> token of the syntax.
656 * Link to numaddr_range::nar_range_exprs.
680 * Extracts tokens from strings.
682 * Looks for \a delim in string \a next, sets \a res to point to
683 * substring before the delimiter, sets \a next right after the found
686 * \retval 1 if \a res points to a string of non-whitespace characters
687 * \retval 0 otherwise
690 gettok(struct lstr *next, char delim, struct lstr *res)
694 if (next->ls_str == NULL)
697 /* skip leading white spaces */
698 while (next->ls_len) {
699 if (!cfs_iswhite(*next->ls_str))
704 if (next->ls_len == 0)
705 /* whitespaces only */
708 if (*next->ls_str == delim)
709 /* first non-writespace is the delimiter */
712 res->ls_str = next->ls_str;
713 end = memchr(next->ls_str, delim, next->ls_len);
715 /* there is no the delimeter in the string */
716 end = next->ls_str + next->ls_len;
719 next->ls_str = end + 1;
720 next->ls_len -= (end - res->ls_str + 1);
723 /* skip ending whitespaces */
724 while (--end != res->ls_str)
725 if (!cfs_iswhite(*end))
728 res->ls_len = end - res->ls_str + 1;
733 * Converts string to integer.
735 * Accepts decimal and hexadecimal number recordings.
737 * \retval 1 if first \a nob chars of \a str convert to decimal or
738 * hexadecimal integer in the range [\a min, \a max]
739 * \retval 0 otherwise
742 libcfs_str2num_check(const char *str, int nob, unsigned *num,
743 unsigned min, unsigned max)
749 if (sscanf(str, "%u%n", num, &n) != 1 || n != nob)
750 if (sscanf(str, "0x%x%n", num, &n) != 1 || n != nob)
751 if (sscanf(str, "0X%x%n", num, &n) != 1 || n != nob)
753 sprintf(nstr, "%u", *num);
754 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
755 sprintf(nstr, "0x%x", *num);
756 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
757 sprintf(nstr, "0X%x", *num);
758 if (n != strlen(nstr) || memcmp(nstr, str, n))
762 if (*num < min || *num > max)
768 * Parses \<range_expr\> token of the syntax.
770 * \retval pointer to allocated range_expr and initialized
771 * range_expr::re_lo, range_expr::re_hi and range_expr:re_stride if \a
774 * \<number\> '-' \<number\> |
775 * \<number\> '-' \<number\> '/' \<number\>
776 * \retval NULL othersize
778 static struct range_expr *
779 parse_range_expr(struct lstr *src, unsigned min, unsigned max)
782 struct range_expr *expr;
784 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
788 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_lo,
790 /* <number> is parsed */
791 expr->re_hi = expr->re_lo;
796 if (!gettok(src, '-', &tok))
798 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len, &expr->re_lo,
802 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_hi,
804 /* <number> - <number> is parsed */
809 /* go to check <number> '-' <number> '/' <number> */
810 if (gettok(src, '/', &tok)) {
811 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len,
812 &expr->re_hi, min, max))
814 /* <number> - <number> / ... */
815 if (libcfs_str2num_check(src->ls_str, src->ls_len,
816 &expr->re_stride, min, max))
817 /* <number> - <number> / <number> is parsed */
822 LIBCFS_FREE(expr, sizeof(struct range_expr));
827 * Parses \<expr_list\> token of the syntax.
829 * \retval 1 if \a str parses to '[' \<range_expr\> [ ',' \<range_expr\>] ']'
830 * \retval 0 otherwise
833 parse_expr_list(struct lstr *str, cfs_list_t *list,
834 unsigned min, unsigned max)
837 struct range_expr *range;
839 if (str->ls_str[0] != '[' || str->ls_str[str->ls_len - 1] != ']')
844 while (str->ls_str) {
845 if (gettok(str, ',', &res) == 0)
847 range = parse_range_expr(&res, min, max);
850 cfs_list_add_tail(&range->re_link, list);
856 * Parses \<numaddr_range\> token of the syntax.
858 * \retval 1 if \a str parses to \<number\> | \<expr_list\>
859 * \retval 0 otherwise
862 num_parse(char *str, int len,
863 cfs_list_t *list, unsigned min, unsigned max)
867 struct numaddr_range *numaddr;
872 LIBCFS_ALLOC(numaddr, sizeof(struct numaddr_range));
875 cfs_list_add_tail(&numaddr->nar_link, list);
876 CFS_INIT_LIST_HEAD(&numaddr->nar_range_exprs);
878 if (libcfs_str2num_check(src.ls_str, src.ls_len, &num, min, max)) {
880 struct range_expr *expr;
882 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
886 expr->re_lo = expr->re_hi = num;
888 cfs_list_add_tail(&expr->re_link, &numaddr->nar_range_exprs);
892 return parse_expr_list(&src, &numaddr->nar_range_exprs, min, max);
896 * Nf_parse_addrlist method for networks using numeric addresses.
898 * Examples of such networks are gm and elan.
900 * \retval 1 if \a str parsed to numeric address
901 * \retval 0 otherwise
904 libcfs_num_parse(char *str, int len, cfs_list_t *list)
906 return num_parse(str, len, list, 0, MAX_NUMERIC_VALUE);
910 * Nf_parse_addrlist method for networks using ip addresses.
912 * Examples of such networks are tcp and o2ib.
914 * \retval 1 if \a str parsed to ip address
915 * \retval 0 otherwise
918 libcfs_ip_parse(char *str, int len,
921 struct lstr src, res;
928 if (gettok(&src, '.', &res) == 0)
930 if (!num_parse(res.ls_str, res.ls_len, list, 0, 255))
935 return (i == 4) ? 1 : 0;
939 * Parses \<addrrange\> token on the syntax.
941 * Allocates struct addrrange and links to \a nidrange via
942 * (nidrange::nr_addrranges)
944 * \retval 1 if \a src parses to '*' | \<ipaddr_range\> | \<numaddr_range\>
945 * \retval 0 otherwise
948 parse_addrange(const struct lstr *src, struct nidrange *nidrange)
950 struct addrrange *addrrange;
952 if (src->ls_len == 1 && src->ls_str[0] == '*') {
953 nidrange->nr_all = 1;
957 LIBCFS_ALLOC(addrrange, sizeof(struct addrrange));
958 if (addrrange == NULL)
960 cfs_list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
961 CFS_INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
963 return nidrange->nr_netstrfns->nf_parse_addrlist(src->ls_str,
965 &addrrange->ar_numaddr_ranges);
969 * Finds or creates struct nidrange.
971 * Checks if \a src is a valid network name, looks for corresponding
972 * nidrange on the ist of nidranges (\a nidlist), creates new struct
973 * nidrange if it is not found.
975 * \retval pointer to struct nidrange matching network specified via \a src
976 * \retval NULL if \a src does not match any network
978 static struct nidrange *
979 add_nidrange(const struct lstr *src,
982 struct netstrfns *nf;
987 if (src->ls_len >= LNET_NIDSTR_SIZE)
990 nf = libcfs_namenum2netstrfns(src->ls_str);
993 endlen = src->ls_len - strlen(nf->nf_name);
995 /* network name only, e.g. "elan" or "tcp" */
998 /* e.g. "elan25" or "tcp23", refuse to parse if
999 * network name is not appended with decimal or
1000 * hexadecimal number */
1001 if (!libcfs_str2num_check(src->ls_str + strlen(nf->nf_name),
1003 0, MAX_NUMERIC_VALUE))
1007 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1008 if (nr->nr_netstrfns != nf)
1010 if (nr->nr_netnum != netnum)
1015 LIBCFS_ALLOC(nr, sizeof(struct nidrange));
1018 cfs_list_add_tail(&nr->nr_link, nidlist);
1019 CFS_INIT_LIST_HEAD(&nr->nr_addrranges);
1020 nr->nr_netstrfns = nf;
1022 nr->nr_netnum = netnum;
1028 * Parses \<nidrange\> token of the syntax.
1030 * \retval 1 if \a src parses to \<addrrange\> '@' \<net\>
1031 * \retval 0 otherwise
1034 parse_nidrange(struct lstr *src, cfs_list_t *nidlist)
1036 struct lstr addrrange, net, tmp;
1037 struct nidrange *nr;
1040 if (gettok(src, '@', &addrrange) == 0)
1043 if (gettok(src, '@', &net) == 0 || src->ls_str != NULL)
1046 nr = add_nidrange(&net, nidlist);
1050 if (!parse_addrange(&addrrange, nr))
1055 CWARN("can't parse nidrange: \"%.*s\"\n", tmp.ls_len, tmp.ls_str);
1060 * Frees range_expr structures of \a list.
1065 free_range_exprs(cfs_list_t *list)
1067 cfs_list_t *pos, *next;
1069 cfs_list_for_each_safe(pos, next, list) {
1071 LIBCFS_FREE(cfs_list_entry(pos, struct range_expr, re_link),
1072 sizeof(struct range_expr));
1077 * Frees numaddr_range structures of \a list.
1079 * For each struct numaddr_range structure found on \a list it frees
1080 * range_expr list attached to it and frees the numddr_range itself.
1085 free_numaddr_ranges(cfs_list_t *list)
1087 cfs_list_t *pos, *next;
1088 struct numaddr_range *numaddr;
1090 cfs_list_for_each_safe(pos, next, list) {
1091 numaddr = cfs_list_entry(pos, struct numaddr_range, nar_link);
1092 free_range_exprs(&numaddr->nar_range_exprs);
1094 LIBCFS_FREE(numaddr, sizeof(struct numaddr_range));
1099 * Frees addrrange structures of \a list.
1101 * For each struct addrrange structure found on \a list it frees
1102 * numaddr_range list attached to it and frees the addrrange itself.
1107 free_addrranges(cfs_list_t *list)
1109 cfs_list_t *pos, *next;
1110 struct addrrange *ar;
1112 cfs_list_for_each_safe(pos, next, list) {
1113 ar = cfs_list_entry(pos, struct addrrange, ar_link);
1114 free_numaddr_ranges(&ar->ar_numaddr_ranges);
1116 LIBCFS_FREE(ar, sizeof(struct addrrange));
1121 * Frees nidrange strutures of \a list.
1123 * For each struct nidrange structure found on \a list it frees
1124 * addrrange list attached to it and frees the nidrange itself.
1129 cfs_free_nidlist(cfs_list_t *list)
1131 cfs_list_t *pos, *next;
1132 struct nidrange *nr;
1134 cfs_list_for_each_safe(pos, next, list) {
1135 nr = cfs_list_entry(pos, struct nidrange, nr_link);
1136 free_addrranges(&nr->nr_addrranges);
1138 LIBCFS_FREE(nr, sizeof(struct nidrange));
1143 * Parses nid range list.
1145 * Parses with rigorous syntax and overflow checking \a str into
1146 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
1147 * structures and links that structure to \a nidlist. The resulting
1148 * list can be used to match a NID againts set of NIDS defined by \a
1150 * \see cfs_match_nid
1152 * \retval 1 on success
1153 * \retval 0 otherwise
1156 cfs_parse_nidlist(char *str, int len, cfs_list_t *nidlist)
1158 struct lstr src, res;
1164 CFS_INIT_LIST_HEAD(nidlist);
1165 while (src.ls_str) {
1166 rc = gettok(&src, ' ', &res);
1168 cfs_free_nidlist(nidlist);
1171 rc = parse_nidrange(&res, nidlist);
1173 cfs_free_nidlist(nidlist);
1181 * Matches address (\a addr) against address set encoded in \a list.
1183 * \see libcfs_num_match(), libcfs_ip_match()
1185 * \retval 1 if \a addr matches
1186 * \retval 0 otherwise
1189 match_numaddr(__u32 addr, cfs_list_t *list, int shift, __u32 mask)
1191 struct numaddr_range *numaddr;
1192 struct range_expr *expr;
1196 cfs_list_for_each_entry(numaddr, list, nar_link) {
1197 ip = (addr >> shift) & mask;
1200 cfs_list_for_each_entry(expr, &numaddr->nar_range_exprs,
1202 if (ip >= expr->re_lo &&
1203 ip <= expr->re_hi &&
1204 ((ip - expr->re_lo) % expr->re_stride) == 0) {
1216 * Nf_match_addr method for networks using numeric addresses
1218 * \retval 1 on match
1219 * \retval 0 otherwise
1222 libcfs_num_match(__u32 addr, cfs_list_t *numaddr)
1224 return match_numaddr(addr, numaddr, 0, 0xffffffff);
1228 * Nf_match_addr method for networks using ip addresses
1230 * \retval 1 on match
1231 * \retval 0 otherwise
1234 libcfs_ip_match(__u32 addr, cfs_list_t *numaddr)
1236 return match_numaddr(addr, numaddr, 24, 0xff);
1240 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
1242 * \see cfs_parse_nidlist()
1244 * \retval 1 on match
1245 * \retval 0 otherwises
1247 int cfs_match_nid(lnet_nid_t nid, cfs_list_t *nidlist)
1249 struct nidrange *nr;
1250 struct addrrange *ar;
1253 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1254 if (nr->nr_netstrfns->nf_type != LNET_NETTYP(LNET_NIDNET(nid)))
1256 if (nr->nr_netnum != LNET_NETNUM(LNET_NIDNET(nid)))
1260 cfs_list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
1261 if (nr->nr_netstrfns->nf_match_addr(LNET_NIDADDR(nid),
1262 &ar->ar_numaddr_ranges))
1270 EXPORT_SYMBOL(libcfs_isknown_lnd);
1271 EXPORT_SYMBOL(libcfs_lnd2modname);
1272 EXPORT_SYMBOL(libcfs_lnd2str);
1273 EXPORT_SYMBOL(libcfs_str2lnd);
1274 EXPORT_SYMBOL(libcfs_net2str);
1275 EXPORT_SYMBOL(libcfs_nid2str);
1276 EXPORT_SYMBOL(libcfs_str2net);
1277 EXPORT_SYMBOL(libcfs_str2nid);
1278 EXPORT_SYMBOL(libcfs_id2str);
1279 EXPORT_SYMBOL(libcfs_str2anynid);
1280 EXPORT_SYMBOL(cfs_iswhite);
1281 EXPORT_SYMBOL(cfs_free_nidlist);
1282 EXPORT_SYMBOL(cfs_parse_nidlist);
1283 EXPORT_SYMBOL(cfs_match_nid);