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 (c) 2008, 2010, Oracle and/or its affiliates. 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 static char libcfs_nidstrings[LNET_NIDSTR_COUNT][LNET_NIDSTR_SIZE];
68 static int libcfs_nidstring_idx = 0;
71 static cfs_spinlock_t libcfs_nidstring_lock;
73 void libcfs_init_nidstrings (void)
75 cfs_spin_lock_init(&libcfs_nidstring_lock);
78 # define NIDSTR_LOCK(f) cfs_spin_lock_irqsave(&libcfs_nidstring_lock, f)
79 # define NIDSTR_UNLOCK(f) cfs_spin_unlock_irqrestore(&libcfs_nidstring_lock, f)
81 # define NIDSTR_LOCK(f) (f=0) /* avoid unused var warnings */
82 # define NIDSTR_UNLOCK(f) (f=0)
86 libcfs_next_nidstring (void)
93 str = libcfs_nidstrings[libcfs_nidstring_idx++];
94 if (libcfs_nidstring_idx ==
95 sizeof(libcfs_nidstrings)/sizeof(libcfs_nidstrings[0]))
96 libcfs_nidstring_idx = 0;
102 static int libcfs_lo_str2addr(const char *str, int nob, __u32 *addr);
103 static void libcfs_ip_addr2str(__u32 addr, char *str);
104 static int libcfs_ip_str2addr(const char *str, int nob, __u32 *addr);
105 static void libcfs_decnum_addr2str(__u32 addr, char *str);
106 static void libcfs_hexnum_addr2str(__u32 addr, char *str);
107 static int libcfs_num_str2addr(const char *str, int nob, __u32 *addr);
108 static int libcfs_ip_parse(char *str, int len, cfs_list_t *list);
109 static int libcfs_num_parse(char *str, int len, cfs_list_t *list);
110 static int libcfs_ip_match(__u32 addr, cfs_list_t *list);
111 static int libcfs_num_match(__u32 addr, cfs_list_t *list);
117 void (*nf_addr2str)(__u32 addr, char *str);
118 int (*nf_str2addr)(const char *str, int nob, __u32 *addr);
119 int (*nf_parse_addrlist)(char *str, int len,
121 int (*nf_match_addr)(__u32 addr, cfs_list_t *list);
124 static struct netstrfns libcfs_netstrfns[] = {
125 {/* .nf_type */ LOLND,
127 /* .nf_modname */ "klolnd",
128 /* .nf_addr2str */ libcfs_decnum_addr2str,
129 /* .nf_str2addr */ libcfs_lo_str2addr,
130 /* .nf_parse_addr*/ libcfs_num_parse,
131 /* .nf_match_addr*/ libcfs_num_match},
132 {/* .nf_type */ SOCKLND,
133 /* .nf_name */ "tcp",
134 /* .nf_modname */ "ksocklnd",
135 /* .nf_addr2str */ libcfs_ip_addr2str,
136 /* .nf_str2addr */ libcfs_ip_str2addr,
137 /* .nf_parse_addrlist*/ libcfs_ip_parse,
138 /* .nf_match_addr*/ libcfs_ip_match},
139 {/* .nf_type */ O2IBLND,
140 /* .nf_name */ "o2ib",
141 /* .nf_modname */ "ko2iblnd",
142 /* .nf_addr2str */ libcfs_ip_addr2str,
143 /* .nf_str2addr */ libcfs_ip_str2addr,
144 /* .nf_parse_addrlist*/ libcfs_ip_parse,
145 /* .nf_match_addr*/ libcfs_ip_match},
146 {/* .nf_type */ CIBLND,
147 /* .nf_name */ "cib",
148 /* .nf_modname */ "kciblnd",
149 /* .nf_addr2str */ libcfs_ip_addr2str,
150 /* .nf_str2addr */ libcfs_ip_str2addr,
151 /* .nf_parse_addrlist*/ libcfs_ip_parse,
152 /* .nf_match_addr*/ libcfs_ip_match},
153 {/* .nf_type */ OPENIBLND,
154 /* .nf_name */ "openib",
155 /* .nf_modname */ "kopeniblnd",
156 /* .nf_addr2str */ libcfs_ip_addr2str,
157 /* .nf_str2addr */ libcfs_ip_str2addr,
158 /* .nf_parse_addrlist*/ libcfs_ip_parse,
159 /* .nf_match_addr*/ libcfs_ip_match},
160 {/* .nf_type */ IIBLND,
161 /* .nf_name */ "iib",
162 /* .nf_modname */ "kiiblnd",
163 /* .nf_addr2str */ libcfs_ip_addr2str,
164 /* .nf_str2addr */ libcfs_ip_str2addr,
165 /* .nf_parse_addrlist*/ libcfs_ip_parse,
166 /* .nf_match_addr*/ libcfs_ip_match},
167 {/* .nf_type */ VIBLND,
168 /* .nf_name */ "vib",
169 /* .nf_modname */ "kviblnd",
170 /* .nf_addr2str */ libcfs_ip_addr2str,
171 /* .nf_str2addr */ libcfs_ip_str2addr,
172 /* .nf_parse_addrlist*/ libcfs_ip_parse,
173 /* .nf_match_addr*/ libcfs_ip_match},
174 {/* .nf_type */ RALND,
176 /* .nf_modname */ "kralnd",
177 /* .nf_addr2str */ libcfs_ip_addr2str,
178 /* .nf_str2addr */ libcfs_ip_str2addr,
179 /* .nf_parse_addrlist*/ libcfs_ip_parse,
180 /* .nf_match_addr*/ libcfs_ip_match},
181 {/* .nf_type */ QSWLND,
182 /* .nf_name */ "elan",
183 /* .nf_modname */ "kqswlnd",
184 /* .nf_addr2str */ libcfs_decnum_addr2str,
185 /* .nf_str2addr */ libcfs_num_str2addr,
186 /* .nf_parse_addrlist*/ libcfs_num_parse,
187 /* .nf_match_addr*/ libcfs_num_match},
188 {/* .nf_type */ GMLND,
190 /* .nf_modname */ "kgmlnd",
191 /* .nf_addr2str */ libcfs_hexnum_addr2str,
192 /* .nf_str2addr */ libcfs_num_str2addr,
193 /* .nf_parse_addrlist*/ libcfs_num_parse,
194 /* .nf_match_addr*/ libcfs_num_match},
195 {/* .nf_type */ MXLND,
197 /* .nf_modname */ "kmxlnd",
198 /* .nf_addr2str */ libcfs_ip_addr2str,
199 /* .nf_str2addr */ libcfs_ip_str2addr,
200 /* .nf_parse_addrlist*/ libcfs_ip_parse,
201 /* .nf_match_addr*/ libcfs_ip_match},
202 {/* .nf_type */ PTLLND,
203 /* .nf_name */ "ptl",
204 /* .nf_modname */ "kptllnd",
205 /* .nf_addr2str */ libcfs_decnum_addr2str,
206 /* .nf_str2addr */ libcfs_num_str2addr,
207 /* .nf_parse_addrlist*/ libcfs_num_parse,
208 /* .nf_match_addr*/ libcfs_num_match},
209 {/* .nf_type */ GNILND,
210 /* .nf_name */ "gni",
211 /* .nf_modname */ "kgnilnd",
212 /* .nf_addr2str */ libcfs_decnum_addr2str,
213 /* .nf_str2addr */ libcfs_num_str2addr,
214 /* .nf_parse_addrlist*/ libcfs_num_parse,
215 /* .nf_match_addr*/ libcfs_num_match},
216 /* placeholder for net0 alias. It MUST BE THE LAST ENTRY */
220 const int libcfs_nnetstrfns = sizeof(libcfs_netstrfns)/sizeof(libcfs_netstrfns[0]);
223 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
230 libcfs_ip_addr2str(__u32 addr, char *str)
232 #if 0 /* never lookup */
233 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
234 __u32 netip = htonl(addr);
235 struct hostent *he = gethostbyaddr(&netip, sizeof(netip), AF_INET);
238 snprintf(str, LNET_NIDSTR_SIZE, "%s", he->h_name);
243 snprintf(str, LNET_NIDSTR_SIZE, "%u.%u.%u.%u",
244 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
245 (addr >> 8) & 0xff, addr & 0xff);
248 /* CAVEAT EMPTOR XscanfX
249 * I use "%n" at the end of a sscanf format to detect trailing junk. However
250 * sscanf may return immediately if it sees the terminating '0' in a string, so
251 * I initialise the %n variable to the expected length. If sscanf sets it;
252 * fine, if it doesn't, then the scan ended at the end of the string, which is
256 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
262 int n = nob; /* XscanfX */
265 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
267 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
268 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
269 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
273 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
274 /* known hostname? */
275 if (('a' <= str[0] && str[0] <= 'z') ||
276 ('A' <= str[0] && str[0] <= 'Z')) {
279 LIBCFS_ALLOC(tmp, nob + 1);
283 memcpy(tmp, str, nob);
286 he = gethostbyname(tmp);
288 LIBCFS_FREE(tmp, nob);
291 __u32 ip = *(__u32 *)he->h_addr;
303 libcfs_decnum_addr2str(__u32 addr, char *str)
305 snprintf(str, LNET_NIDSTR_SIZE, "%u", addr);
309 libcfs_hexnum_addr2str(__u32 addr, char *str)
311 snprintf(str, LNET_NIDSTR_SIZE, "0x%x", addr);
315 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
320 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
324 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
328 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
335 libcfs_lnd2netstrfns(int lnd)
340 for (i = 0; i < libcfs_nnetstrfns; i++)
341 if (lnd == libcfs_netstrfns[i].nf_type)
342 return &libcfs_netstrfns[i];
348 libcfs_namenum2netstrfns(const char *name)
350 struct netstrfns *nf;
353 for (i = 0; i < libcfs_nnetstrfns; i++) {
354 nf = &libcfs_netstrfns[i];
355 if (nf->nf_type >= 0 &&
356 !strncmp(name, nf->nf_name, strlen(nf->nf_name)))
363 libcfs_name2netstrfns(const char *name)
367 for (i = 0; i < libcfs_nnetstrfns; i++)
368 if (libcfs_netstrfns[i].nf_type >= 0 &&
369 !strcmp(libcfs_netstrfns[i].nf_name, name))
370 return &libcfs_netstrfns[i];
376 libcfs_isknown_lnd(int type)
378 return libcfs_lnd2netstrfns(type) != NULL;
382 libcfs_lnd2modname(int lnd)
384 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
386 return (nf == NULL) ? NULL : nf->nf_modname;
390 libcfs_lnd2str(int lnd)
393 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
398 str = libcfs_next_nidstring();
399 snprintf(str, LNET_NIDSTR_SIZE, "?%u?", lnd);
404 libcfs_str2lnd(const char *str)
406 struct netstrfns *nf = libcfs_name2netstrfns(str);
415 libcfs_net2str(__u32 net)
417 int lnd = LNET_NETTYP(net);
418 int num = LNET_NETNUM(net);
419 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
420 char *str = libcfs_next_nidstring();
423 snprintf(str, LNET_NIDSTR_SIZE, "<%u:%u>", lnd, num);
425 snprintf(str, LNET_NIDSTR_SIZE, "%s", nf->nf_name);
427 snprintf(str, LNET_NIDSTR_SIZE, "%s%u", nf->nf_name, num);
433 libcfs_nid2str(lnet_nid_t nid)
435 __u32 addr = LNET_NIDADDR(nid);
436 __u32 net = LNET_NIDNET(nid);
437 int lnd = LNET_NETTYP(net);
438 int nnum = LNET_NETNUM(net);
439 struct netstrfns *nf;
443 if (nid == LNET_NID_ANY)
446 nf = libcfs_lnd2netstrfns(lnd);
447 str = libcfs_next_nidstring();
450 snprintf(str, LNET_NIDSTR_SIZE, "%x@<%u:%u>", addr, lnd, nnum);
452 nf->nf_addr2str(addr, str);
455 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s",
458 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s%u",
465 static struct netstrfns *
466 libcfs_str2net_internal(const char *str, __u32 *net)
468 struct netstrfns *nf;
473 for (i = 0; i < libcfs_nnetstrfns; i++) {
474 nf = &libcfs_netstrfns[i];
475 if (nf->nf_type >= 0 &&
476 !strncmp(str, nf->nf_name, strlen(nf->nf_name)))
480 if (i == libcfs_nnetstrfns)
483 nob = strlen(nf->nf_name);
485 if (strlen(str) == (unsigned int)nob) {
488 if (nf->nf_type == LOLND) /* net number not allowed */
493 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
494 i != (int)strlen(str))
498 *net = LNET_MKNET(nf->nf_type, netnum);
503 libcfs_str2net(const char *str)
507 if (libcfs_str2net_internal(str, &net) != NULL)
510 return LNET_NIDNET(LNET_NID_ANY);
514 libcfs_str2nid(const char *str)
516 const char *sep = strchr(str, '@');
517 struct netstrfns *nf;
522 nf = libcfs_str2net_internal(sep + 1, &net);
526 sep = str + strlen(str);
527 net = LNET_MKNET(SOCKLND, 0);
528 nf = libcfs_lnd2netstrfns(SOCKLND);
529 LASSERT (nf != NULL);
532 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
535 return LNET_MKNID(net, addr);
539 libcfs_id2str(lnet_process_id_t id)
541 char *str = libcfs_next_nidstring();
543 if (id.pid == LNET_PID_ANY) {
544 snprintf(str, LNET_NIDSTR_SIZE,
545 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
549 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
550 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
551 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
556 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
558 if (!strcmp(str, "*")) {
559 *nidp = LNET_NID_ANY;
563 *nidp = libcfs_str2nid(str);
564 return *nidp != LNET_NID_ANY;
568 * Nid range list syntax.
571 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
572 * <nidrange> :== <addrrange> '@' <net>
573 * <addrrange> :== '*' |
576 * <ipaddr_range> :== <numaddr_range>.<numaddr_range>.<numaddr_range>.
578 * <numaddr_range> :== <number> |
580 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
581 * <range_expr> :== <number> |
582 * <number> '-' <number> |
583 * <number> '-' <number> '/' <number>
584 * <net> :== <netname> | <netname><number>
585 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
586 * "vib" | "ra" | "elan" | "mx" | "ptl"
591 * Structure to represent NULL-less strings.
599 * Structure to represent \<nidrange\> token of the syntax.
601 * One of this is created for each \<net\> parsed.
605 * Link to list of this structures which is built on nid range
610 * List head for addrrange::ar_link.
612 cfs_list_t nr_addrranges;
614 * Flag indicating that *@<net> is found.
618 * Pointer to corresponding element of libcfs_netstrfns.
620 struct netstrfns *nr_netstrfns;
622 * Number of network. E.g. 5 if \<net\> is "elan5".
628 * Structure to represent \<addrrange\> token of the syntax.
632 * Link to nidrange::nr_addrranges.
636 * List head for numaddr_range::nar_link.
638 cfs_list_t ar_numaddr_ranges;
642 * Structure to represent \<numaddr_range\> token of the syntax.
644 struct numaddr_range {
646 * Link to addrrange::ar_numaddr_ranges.
650 * List head for range_expr::re_link.
652 cfs_list_t nar_range_exprs;
656 * Structure to represent \<range_expr\> token of the syntax.
660 * Link to numaddr_range::nar_range_exprs.
684 * Extracts tokens from strings.
686 * Looks for \a delim in string \a next, sets \a res to point to
687 * substring before the delimiter, sets \a next right after the found
690 * \retval 1 if \a res points to a string of non-whitespace characters
691 * \retval 0 otherwise
694 gettok(struct lstr *next, char delim, struct lstr *res)
698 if (next->ls_str == NULL)
701 /* skip leading white spaces */
702 while (next->ls_len) {
703 if (!cfs_iswhite(*next->ls_str))
708 if (next->ls_len == 0)
709 /* whitespaces only */
712 if (*next->ls_str == delim)
713 /* first non-writespace is the delimiter */
716 res->ls_str = next->ls_str;
717 end = memchr(next->ls_str, delim, next->ls_len);
719 /* there is no the delimeter in the string */
720 end = next->ls_str + next->ls_len;
723 next->ls_str = end + 1;
724 next->ls_len -= (end - res->ls_str + 1);
727 /* skip ending whitespaces */
728 while (--end != res->ls_str)
729 if (!cfs_iswhite(*end))
732 res->ls_len = end - res->ls_str + 1;
737 * Converts string to integer.
739 * Accepts decimal and hexadecimal number recordings.
741 * \retval 1 if first \a nob chars of \a str convert to decimal or
742 * hexadecimal integer in the range [\a min, \a max]
743 * \retval 0 otherwise
746 libcfs_str2num_check(const char *str, int nob, unsigned *num,
747 unsigned min, unsigned max)
753 if (sscanf(str, "%u%n", num, &n) != 1 || n != nob)
754 if (sscanf(str, "0x%x%n", num, &n) != 1 || n != nob)
755 if (sscanf(str, "0X%x%n", num, &n) != 1 || n != nob)
757 sprintf(nstr, "%u", *num);
758 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
759 sprintf(nstr, "0x%x", *num);
760 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
761 sprintf(nstr, "0X%x", *num);
762 if (n != strlen(nstr) || memcmp(nstr, str, n))
766 if (*num < min || *num > max)
772 * Parses \<range_expr\> token of the syntax.
774 * \retval pointer to allocated range_expr and initialized
775 * range_expr::re_lo, range_expr::re_hi and range_expr:re_stride if \a
778 * \<number\> '-' \<number\> |
779 * \<number\> '-' \<number\> '/' \<number\>
780 * \retval NULL othersize
782 static struct range_expr *
783 parse_range_expr(struct lstr *src, unsigned min, unsigned max)
786 struct range_expr *expr;
788 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
792 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_lo,
794 /* <number> is parsed */
795 expr->re_hi = expr->re_lo;
800 if (!gettok(src, '-', &tok))
802 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len, &expr->re_lo,
806 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_hi,
808 /* <number> - <number> is parsed */
813 /* go to check <number> '-' <number> '/' <number> */
814 if (gettok(src, '/', &tok)) {
815 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len,
816 &expr->re_hi, min, max))
818 /* <number> - <number> / ... */
819 if (libcfs_str2num_check(src->ls_str, src->ls_len,
820 &expr->re_stride, min, max))
821 /* <number> - <number> / <number> is parsed */
826 LIBCFS_FREE(expr, sizeof(struct range_expr));
831 * Parses \<expr_list\> token of the syntax.
833 * \retval 1 if \a str parses to '[' \<range_expr\> [ ',' \<range_expr\>] ']'
834 * \retval 0 otherwise
837 parse_expr_list(struct lstr *str, cfs_list_t *list,
838 unsigned min, unsigned max)
841 struct range_expr *range;
843 if (str->ls_str[0] != '[' || str->ls_str[str->ls_len - 1] != ']')
848 while (str->ls_str) {
849 if (gettok(str, ',', &res) == 0)
851 range = parse_range_expr(&res, min, max);
854 cfs_list_add_tail(&range->re_link, list);
860 * Parses \<numaddr_range\> token of the syntax.
862 * \retval 1 if \a str parses to \<number\> | \<expr_list\>
863 * \retval 0 otherwise
866 num_parse(char *str, int len,
867 cfs_list_t *list, unsigned min, unsigned max)
871 struct numaddr_range *numaddr;
876 LIBCFS_ALLOC(numaddr, sizeof(struct numaddr_range));
879 cfs_list_add_tail(&numaddr->nar_link, list);
880 CFS_INIT_LIST_HEAD(&numaddr->nar_range_exprs);
882 if (libcfs_str2num_check(src.ls_str, src.ls_len, &num, min, max)) {
884 struct range_expr *expr;
886 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
890 expr->re_lo = expr->re_hi = num;
892 cfs_list_add_tail(&expr->re_link, &numaddr->nar_range_exprs);
896 return parse_expr_list(&src, &numaddr->nar_range_exprs, min, max);
900 * Nf_parse_addrlist method for networks using numeric addresses.
902 * Examples of such networks are gm and elan.
904 * \retval 1 if \a str parsed to numeric address
905 * \retval 0 otherwise
908 libcfs_num_parse(char *str, int len, cfs_list_t *list)
910 return num_parse(str, len, list, 0, MAX_NUMERIC_VALUE);
914 * Nf_parse_addrlist method for networks using ip addresses.
916 * Examples of such networks are tcp and o2ib.
918 * \retval 1 if \a str parsed to ip address
919 * \retval 0 otherwise
922 libcfs_ip_parse(char *str, int len,
925 struct lstr src, res;
932 if (gettok(&src, '.', &res) == 0)
934 if (!num_parse(res.ls_str, res.ls_len, list, 0, 255))
939 return (i == 4) ? 1 : 0;
943 * Parses \<addrrange\> token on the syntax.
945 * Allocates struct addrrange and links to \a nidrange via
946 * (nidrange::nr_addrranges)
948 * \retval 1 if \a src parses to '*' | \<ipaddr_range\> | \<numaddr_range\>
949 * \retval 0 otherwise
952 parse_addrange(const struct lstr *src, struct nidrange *nidrange)
954 struct addrrange *addrrange;
956 if (src->ls_len == 1 && src->ls_str[0] == '*') {
957 nidrange->nr_all = 1;
961 LIBCFS_ALLOC(addrrange, sizeof(struct addrrange));
962 if (addrrange == NULL)
964 cfs_list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
965 CFS_INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
967 return nidrange->nr_netstrfns->nf_parse_addrlist(src->ls_str,
969 &addrrange->ar_numaddr_ranges);
973 * Finds or creates struct nidrange.
975 * Checks if \a src is a valid network name, looks for corresponding
976 * nidrange on the ist of nidranges (\a nidlist), creates new struct
977 * nidrange if it is not found.
979 * \retval pointer to struct nidrange matching network specified via \a src
980 * \retval NULL if \a src does not match any network
982 static struct nidrange *
983 add_nidrange(const struct lstr *src,
986 struct netstrfns *nf;
991 if (src->ls_len >= LNET_NIDSTR_SIZE)
994 nf = libcfs_namenum2netstrfns(src->ls_str);
997 endlen = src->ls_len - strlen(nf->nf_name);
999 /* network name only, e.g. "elan" or "tcp" */
1002 /* e.g. "elan25" or "tcp23", refuse to parse if
1003 * network name is not appended with decimal or
1004 * hexadecimal number */
1005 if (!libcfs_str2num_check(src->ls_str + strlen(nf->nf_name),
1007 0, MAX_NUMERIC_VALUE))
1011 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1012 if (nr->nr_netstrfns != nf)
1014 if (nr->nr_netnum != netnum)
1019 LIBCFS_ALLOC(nr, sizeof(struct nidrange));
1022 cfs_list_add_tail(&nr->nr_link, nidlist);
1023 CFS_INIT_LIST_HEAD(&nr->nr_addrranges);
1024 nr->nr_netstrfns = nf;
1026 nr->nr_netnum = netnum;
1032 * Parses \<nidrange\> token of the syntax.
1034 * \retval 1 if \a src parses to \<addrrange\> '@' \<net\>
1035 * \retval 0 otherwise
1038 parse_nidrange(struct lstr *src, cfs_list_t *nidlist)
1040 struct lstr addrrange, net, tmp;
1041 struct nidrange *nr;
1044 if (gettok(src, '@', &addrrange) == 0)
1047 if (gettok(src, '@', &net) == 0 || src->ls_str != NULL)
1050 nr = add_nidrange(&net, nidlist);
1054 if (!parse_addrange(&addrrange, nr))
1059 CWARN("can't parse nidrange: \"%.*s\"\n", tmp.ls_len, tmp.ls_str);
1064 * Frees range_expr structures of \a list.
1069 free_range_exprs(cfs_list_t *list)
1071 cfs_list_t *pos, *next;
1073 cfs_list_for_each_safe(pos, next, list) {
1075 LIBCFS_FREE(cfs_list_entry(pos, struct range_expr, re_link),
1076 sizeof(struct range_expr));
1081 * Frees numaddr_range structures of \a list.
1083 * For each struct numaddr_range structure found on \a list it frees
1084 * range_expr list attached to it and frees the numddr_range itself.
1089 free_numaddr_ranges(cfs_list_t *list)
1091 cfs_list_t *pos, *next;
1092 struct numaddr_range *numaddr;
1094 cfs_list_for_each_safe(pos, next, list) {
1095 numaddr = cfs_list_entry(pos, struct numaddr_range, nar_link);
1096 free_range_exprs(&numaddr->nar_range_exprs);
1098 LIBCFS_FREE(numaddr, sizeof(struct numaddr_range));
1103 * Frees addrrange structures of \a list.
1105 * For each struct addrrange structure found on \a list it frees
1106 * numaddr_range list attached to it and frees the addrrange itself.
1111 free_addrranges(cfs_list_t *list)
1113 cfs_list_t *pos, *next;
1114 struct addrrange *ar;
1116 cfs_list_for_each_safe(pos, next, list) {
1117 ar = cfs_list_entry(pos, struct addrrange, ar_link);
1118 free_numaddr_ranges(&ar->ar_numaddr_ranges);
1120 LIBCFS_FREE(ar, sizeof(struct addrrange));
1125 * Frees nidrange strutures of \a list.
1127 * For each struct nidrange structure found on \a list it frees
1128 * addrrange list attached to it and frees the nidrange itself.
1133 cfs_free_nidlist(cfs_list_t *list)
1135 cfs_list_t *pos, *next;
1136 struct nidrange *nr;
1138 cfs_list_for_each_safe(pos, next, list) {
1139 nr = cfs_list_entry(pos, struct nidrange, nr_link);
1140 free_addrranges(&nr->nr_addrranges);
1142 LIBCFS_FREE(nr, sizeof(struct nidrange));
1147 * Parses nid range list.
1149 * Parses with rigorous syntax and overflow checking \a str into
1150 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
1151 * structures and links that structure to \a nidlist. The resulting
1152 * list can be used to match a NID againts set of NIDS defined by \a
1154 * \see cfs_match_nid
1156 * \retval 1 on success
1157 * \retval 0 otherwise
1160 cfs_parse_nidlist(char *str, int len, cfs_list_t *nidlist)
1162 struct lstr src, res;
1168 CFS_INIT_LIST_HEAD(nidlist);
1169 while (src.ls_str) {
1170 rc = gettok(&src, ' ', &res);
1172 cfs_free_nidlist(nidlist);
1175 rc = parse_nidrange(&res, nidlist);
1177 cfs_free_nidlist(nidlist);
1185 * Matches address (\a addr) against address set encoded in \a list.
1187 * \see libcfs_num_match(), libcfs_ip_match()
1189 * \retval 1 if \a addr matches
1190 * \retval 0 otherwise
1193 match_numaddr(__u32 addr, cfs_list_t *list, int shift, __u32 mask)
1195 struct numaddr_range *numaddr;
1196 struct range_expr *expr;
1200 cfs_list_for_each_entry(numaddr, list, nar_link) {
1201 ip = (addr >> shift) & mask;
1204 cfs_list_for_each_entry(expr, &numaddr->nar_range_exprs,
1206 if (ip >= expr->re_lo &&
1207 ip <= expr->re_hi &&
1208 ((ip - expr->re_lo) % expr->re_stride) == 0) {
1220 * Nf_match_addr method for networks using numeric addresses
1222 * \retval 1 on match
1223 * \retval 0 otherwise
1226 libcfs_num_match(__u32 addr, cfs_list_t *numaddr)
1228 return match_numaddr(addr, numaddr, 0, 0xffffffff);
1232 * Nf_match_addr method for networks using ip addresses
1234 * \retval 1 on match
1235 * \retval 0 otherwise
1238 libcfs_ip_match(__u32 addr, cfs_list_t *numaddr)
1240 return match_numaddr(addr, numaddr, 24, 0xff);
1244 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
1246 * \see cfs_parse_nidlist()
1248 * \retval 1 on match
1249 * \retval 0 otherwises
1251 int cfs_match_nid(lnet_nid_t nid, cfs_list_t *nidlist)
1253 struct nidrange *nr;
1254 struct addrrange *ar;
1257 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1258 if (nr->nr_netstrfns->nf_type != LNET_NETTYP(LNET_NIDNET(nid)))
1260 if (nr->nr_netnum != LNET_NETNUM(LNET_NIDNET(nid)))
1264 cfs_list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
1265 if (nr->nr_netstrfns->nf_match_addr(LNET_NIDADDR(nid),
1266 &ar->ar_numaddr_ranges))
1274 EXPORT_SYMBOL(libcfs_isknown_lnd);
1275 EXPORT_SYMBOL(libcfs_lnd2modname);
1276 EXPORT_SYMBOL(libcfs_lnd2str);
1277 EXPORT_SYMBOL(libcfs_str2lnd);
1278 EXPORT_SYMBOL(libcfs_net2str);
1279 EXPORT_SYMBOL(libcfs_nid2str);
1280 EXPORT_SYMBOL(libcfs_str2net);
1281 EXPORT_SYMBOL(libcfs_str2nid);
1282 EXPORT_SYMBOL(libcfs_id2str);
1283 EXPORT_SYMBOL(libcfs_str2anynid);
1284 EXPORT_SYMBOL(cfs_iswhite);
1285 EXPORT_SYMBOL(cfs_free_nidlist);
1286 EXPORT_SYMBOL(cfs_parse_nidlist);
1287 EXPORT_SYMBOL(cfs_match_nid);