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 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 /* placeholder for net0 alias. It MUST BE THE LAST ENTRY */
213 const int libcfs_nnetstrfns = sizeof(libcfs_netstrfns)/sizeof(libcfs_netstrfns[0]);
216 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
223 libcfs_ip_addr2str(__u32 addr, char *str)
225 #if 0 /* never lookup */
226 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
227 __u32 netip = htonl(addr);
228 struct hostent *he = gethostbyaddr(&netip, sizeof(netip), AF_INET);
231 snprintf(str, LNET_NIDSTR_SIZE, "%s", he->h_name);
236 snprintf(str, LNET_NIDSTR_SIZE, "%u.%u.%u.%u",
237 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
238 (addr >> 8) & 0xff, addr & 0xff);
241 /* CAVEAT EMPTOR XscanfX
242 * I use "%n" at the end of a sscanf format to detect trailing junk. However
243 * sscanf may return immediately if it sees the terminating '0' in a string, so
244 * I initialise the %n variable to the expected length. If sscanf sets it;
245 * fine, if it doesn't, then the scan ended at the end of the string, which is
249 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
255 int n = nob; /* XscanfX */
258 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
260 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
261 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
262 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
266 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
267 /* known hostname? */
268 if (('a' <= str[0] && str[0] <= 'z') ||
269 ('A' <= str[0] && str[0] <= 'Z')) {
272 LIBCFS_ALLOC(tmp, nob + 1);
276 memcpy(tmp, str, nob);
279 he = gethostbyname(tmp);
281 LIBCFS_FREE(tmp, nob);
284 __u32 ip = *(__u32 *)he->h_addr;
296 libcfs_decnum_addr2str(__u32 addr, char *str)
298 snprintf(str, LNET_NIDSTR_SIZE, "%u", addr);
302 libcfs_hexnum_addr2str(__u32 addr, char *str)
304 snprintf(str, LNET_NIDSTR_SIZE, "0x%x", addr);
308 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
313 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
317 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
321 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
328 libcfs_lnd2netstrfns(int lnd)
333 for (i = 0; i < libcfs_nnetstrfns; i++)
334 if (lnd == libcfs_netstrfns[i].nf_type)
335 return &libcfs_netstrfns[i];
341 libcfs_namenum2netstrfns(const char *name)
343 struct netstrfns *nf;
346 for (i = 0; i < libcfs_nnetstrfns; i++) {
347 nf = &libcfs_netstrfns[i];
348 if (nf->nf_type >= 0 &&
349 !strncmp(name, nf->nf_name, strlen(nf->nf_name)))
356 libcfs_name2netstrfns(const char *name)
360 for (i = 0; i < libcfs_nnetstrfns; i++)
361 if (libcfs_netstrfns[i].nf_type >= 0 &&
362 !strcmp(libcfs_netstrfns[i].nf_name, name))
363 return &libcfs_netstrfns[i];
369 libcfs_isknown_lnd(int type)
371 return libcfs_lnd2netstrfns(type) != NULL;
375 libcfs_lnd2modname(int lnd)
377 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
379 return (nf == NULL) ? NULL : nf->nf_modname;
383 libcfs_lnd2str(int lnd)
386 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
391 str = libcfs_next_nidstring();
392 snprintf(str, LNET_NIDSTR_SIZE, "?%u?", lnd);
397 libcfs_str2lnd(const char *str)
399 struct netstrfns *nf = libcfs_name2netstrfns(str);
408 libcfs_net2str(__u32 net)
410 int lnd = LNET_NETTYP(net);
411 int num = LNET_NETNUM(net);
412 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
413 char *str = libcfs_next_nidstring();
416 snprintf(str, LNET_NIDSTR_SIZE, "<%u:%u>", lnd, num);
418 snprintf(str, LNET_NIDSTR_SIZE, "%s", nf->nf_name);
420 snprintf(str, LNET_NIDSTR_SIZE, "%s%u", nf->nf_name, num);
426 libcfs_nid2str(lnet_nid_t nid)
428 __u32 addr = LNET_NIDADDR(nid);
429 __u32 net = LNET_NIDNET(nid);
430 int lnd = LNET_NETTYP(net);
431 int nnum = LNET_NETNUM(net);
432 struct netstrfns *nf;
436 if (nid == LNET_NID_ANY)
437 return "LNET_NID_ANY";
439 nf = libcfs_lnd2netstrfns(lnd);
440 str = libcfs_next_nidstring();
443 snprintf(str, LNET_NIDSTR_SIZE, "%x@<%u:%u>", addr, lnd, nnum);
445 nf->nf_addr2str(addr, str);
448 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s",
451 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s%u",
458 static struct netstrfns *
459 libcfs_str2net_internal(const char *str, __u32 *net)
461 struct netstrfns *nf;
466 for (i = 0; i < libcfs_nnetstrfns; i++) {
467 nf = &libcfs_netstrfns[i];
468 if (nf->nf_type >= 0 &&
469 !strncmp(str, nf->nf_name, strlen(nf->nf_name)))
473 if (i == libcfs_nnetstrfns)
476 nob = strlen(nf->nf_name);
478 if (strlen(str) == (unsigned int)nob) {
481 if (nf->nf_type == LOLND) /* net number not allowed */
486 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
487 i != (int)strlen(str))
491 *net = LNET_MKNET(nf->nf_type, netnum);
496 libcfs_str2net(const char *str)
500 if (libcfs_str2net_internal(str, &net) != NULL)
503 return LNET_NIDNET(LNET_NID_ANY);
507 libcfs_str2nid(const char *str)
509 const char *sep = strchr(str, '@');
510 struct netstrfns *nf;
515 nf = libcfs_str2net_internal(sep + 1, &net);
519 sep = str + strlen(str);
520 net = LNET_MKNET(SOCKLND, 0);
521 nf = libcfs_lnd2netstrfns(SOCKLND);
522 LASSERT (nf != NULL);
525 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
528 return LNET_MKNID(net, addr);
532 libcfs_id2str(lnet_process_id_t id)
534 char *str = libcfs_next_nidstring();
536 if (id.pid == LNET_PID_ANY) {
537 snprintf(str, LNET_NIDSTR_SIZE,
538 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
542 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
543 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
544 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
549 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
551 if (!strcmp(str, "*")) {
552 *nidp = LNET_NID_ANY;
556 *nidp = libcfs_str2nid(str);
557 return *nidp != LNET_NID_ANY;
561 * Nid range list syntax.
564 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
565 * <nidrange> :== <addrrange> '@' <net>
566 * <addrrange> :== '*' |
569 * <ipaddr_range> :== <numaddr_range>.<numaddr_range>.<numaddr_range>.
571 * <numaddr_range> :== <number> |
573 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
574 * <range_expr> :== <number> |
575 * <number> '-' <number> |
576 * <number> '-' <number> '/' <number>
577 * <net> :== <netname> | <netname><number>
578 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
579 * "vib" | "ra" | "elan" | "gm" | "mx" | "ptl"
584 * Structure to represent NULL-less strings.
592 * Structure to represent \<nidrange\> token of the syntax.
594 * One of this is created for each \<net\> parsed.
598 * Link to list of this structures which is built on nid range
603 * List head for addrrange::ar_link.
605 cfs_list_t nr_addrranges;
607 * Flag indicating that *@<net> is found.
611 * Pointer to corresponding element of libcfs_netstrfns.
613 struct netstrfns *nr_netstrfns;
615 * Number of network. E.g. 5 if \<net\> is "elan5".
621 * Structure to represent \<addrrange\> token of the syntax.
625 * Link to nidrange::nr_addrranges.
629 * List head for numaddr_range::nar_link.
631 cfs_list_t ar_numaddr_ranges;
635 * Structure to represent \<numaddr_range\> token of the syntax.
637 struct numaddr_range {
639 * Link to addrrange::ar_numaddr_ranges.
643 * List head for range_expr::re_link.
645 cfs_list_t nar_range_exprs;
649 * Structure to represent \<range_expr\> token of the syntax.
653 * Link to numaddr_range::nar_range_exprs.
677 * Extracts tokens from strings.
679 * Looks for \a delim in string \a next, sets \a res to point to
680 * substring before the delimiter, sets \a next right after the found
683 * \retval 1 if \a res points to a string of non-whitespace characters
684 * \retval 0 otherwise
687 gettok(struct lstr *next, char delim, struct lstr *res)
691 if (next->ls_str == NULL)
694 /* skip leading white spaces */
695 while (next->ls_len) {
696 if (!cfs_iswhite(*next->ls_str))
701 if (next->ls_len == 0)
702 /* whitespaces only */
705 if (*next->ls_str == delim)
706 /* first non-writespace is the delimiter */
709 res->ls_str = next->ls_str;
710 end = memchr(next->ls_str, delim, next->ls_len);
712 /* there is no the delimeter in the string */
713 end = next->ls_str + next->ls_len;
716 next->ls_str = end + 1;
717 next->ls_len -= (end - res->ls_str + 1);
720 /* skip ending whitespaces */
721 while (--end != res->ls_str)
722 if (!cfs_iswhite(*end))
725 res->ls_len = end - res->ls_str + 1;
730 * Converts string to integer.
732 * Accepts decimal and hexadecimal number recordings.
734 * \retval 1 if first \a nob chars of \a str convert to decimal or
735 * hexadecimal integer in the range [\a min, \a max]
736 * \retval 0 otherwise
739 libcfs_str2num_check(const char *str, int nob, unsigned *num,
740 unsigned min, unsigned max)
746 if (sscanf(str, "%u%n", num, &n) != 1 || n != nob)
747 if (sscanf(str, "0x%x%n", num, &n) != 1 || n != nob)
748 if (sscanf(str, "0X%x%n", num, &n) != 1 || n != nob)
750 sprintf(nstr, "%u", *num);
751 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
752 sprintf(nstr, "0x%x", *num);
753 if (n != strlen(nstr) || memcmp(nstr, str, n)) {
754 sprintf(nstr, "0X%x", *num);
755 if (n != strlen(nstr) || memcmp(nstr, str, n))
759 if (*num < min || *num > max)
765 * Parses \<range_expr\> token of the syntax.
767 * \retval pointer to allocated range_expr and initialized
768 * range_expr::re_lo, range_expr::re_hi and range_expr:re_stride if \a
771 * \<number\> '-' \<number\> |
772 * \<number\> '-' \<number\> '/' \<number\>
773 * \retval NULL othersize
775 static struct range_expr *
776 parse_range_expr(struct lstr *src, unsigned min, unsigned max)
779 struct range_expr *expr;
781 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
785 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_lo,
787 /* <number> is parsed */
788 expr->re_hi = expr->re_lo;
793 if (!gettok(src, '-', &tok))
795 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len, &expr->re_lo,
799 if (libcfs_str2num_check(src->ls_str, src->ls_len, &expr->re_hi,
801 /* <number> - <number> is parsed */
806 /* go to check <number> '-' <number> '/' <number> */
807 if (gettok(src, '/', &tok)) {
808 if (!libcfs_str2num_check(tok.ls_str, tok.ls_len,
809 &expr->re_hi, min, max))
811 /* <number> - <number> / ... */
812 if (libcfs_str2num_check(src->ls_str, src->ls_len,
813 &expr->re_stride, min, max))
814 /* <number> - <number> / <number> is parsed */
819 LIBCFS_FREE(expr, sizeof(struct range_expr));
824 * Parses \<expr_list\> token of the syntax.
826 * \retval 1 if \a str parses to '[' \<range_expr\> [ ',' \<range_expr\>] ']'
827 * \retval 0 otherwise
830 parse_expr_list(struct lstr *str, cfs_list_t *list,
831 unsigned min, unsigned max)
834 struct range_expr *range;
836 if (str->ls_str[0] != '[' || str->ls_str[str->ls_len - 1] != ']')
841 while (str->ls_str) {
842 if (gettok(str, ',', &res) == 0)
844 range = parse_range_expr(&res, min, max);
847 cfs_list_add_tail(&range->re_link, list);
853 * Parses \<numaddr_range\> token of the syntax.
855 * \retval 1 if \a str parses to \<number\> | \<expr_list\>
856 * \retval 0 otherwise
859 num_parse(char *str, int len,
860 cfs_list_t *list, unsigned min, unsigned max)
864 struct numaddr_range *numaddr;
869 LIBCFS_ALLOC(numaddr, sizeof(struct numaddr_range));
872 cfs_list_add_tail(&numaddr->nar_link, list);
873 CFS_INIT_LIST_HEAD(&numaddr->nar_range_exprs);
875 if (libcfs_str2num_check(src.ls_str, src.ls_len, &num, min, max)) {
877 struct range_expr *expr;
879 LIBCFS_ALLOC(expr, sizeof(struct range_expr));
883 expr->re_lo = expr->re_hi = num;
885 cfs_list_add_tail(&expr->re_link, &numaddr->nar_range_exprs);
889 return parse_expr_list(&src, &numaddr->nar_range_exprs, min, max);
893 * Nf_parse_addrlist method for networks using numeric addresses.
895 * Examples of such networks are gm and elan.
897 * \retval 1 if \a str parsed to numeric address
898 * \retval 0 otherwise
901 libcfs_num_parse(char *str, int len, cfs_list_t *list)
903 return num_parse(str, len, list, 0, MAX_NUMERIC_VALUE);
907 * Nf_parse_addrlist method for networks using ip addresses.
909 * Examples of such networks are tcp and o2ib.
911 * \retval 1 if \a str parsed to ip address
912 * \retval 0 otherwise
915 libcfs_ip_parse(char *str, int len,
918 struct lstr src, res;
925 if (gettok(&src, '.', &res) == 0)
927 if (!num_parse(res.ls_str, res.ls_len, list, 0, 255))
932 return (i == 4) ? 1 : 0;
936 * Parses \<addrrange\> token on the syntax.
938 * Allocates struct addrrange and links to \a nidrange via
939 * (nidrange::nr_addrranges)
941 * \retval 1 if \a src parses to '*' | \<ipaddr_range\> | \<numaddr_range\>
942 * \retval 0 otherwise
945 parse_addrange(const struct lstr *src, struct nidrange *nidrange)
947 struct addrrange *addrrange;
949 if (src->ls_len == 1 && src->ls_str[0] == '*') {
950 nidrange->nr_all = 1;
954 LIBCFS_ALLOC(addrrange, sizeof(struct addrrange));
955 if (addrrange == NULL)
957 cfs_list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
958 CFS_INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
960 return nidrange->nr_netstrfns->nf_parse_addrlist(src->ls_str,
962 &addrrange->ar_numaddr_ranges);
966 * Finds or creates struct nidrange.
968 * Checks if \a src is a valid network name, looks for corresponding
969 * nidrange on the ist of nidranges (\a nidlist), creates new struct
970 * nidrange if it is not found.
972 * \retval pointer to struct nidrange matching network specified via \a src
973 * \retval NULL if \a src does not match any network
975 static struct nidrange *
976 add_nidrange(const struct lstr *src,
979 struct netstrfns *nf;
984 if (src->ls_len >= LNET_NIDSTR_SIZE)
987 nf = libcfs_namenum2netstrfns(src->ls_str);
990 endlen = src->ls_len - strlen(nf->nf_name);
992 /* network name only, e.g. "elan" or "tcp" */
995 /* e.g. "elan25" or "tcp23", refuse to parse if
996 * network name is not appended with decimal or
997 * hexadecimal number */
998 if (!libcfs_str2num_check(src->ls_str + strlen(nf->nf_name),
1000 0, MAX_NUMERIC_VALUE))
1004 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1005 if (nr->nr_netstrfns != nf)
1007 if (nr->nr_netnum != netnum)
1012 LIBCFS_ALLOC(nr, sizeof(struct nidrange));
1015 cfs_list_add_tail(&nr->nr_link, nidlist);
1016 CFS_INIT_LIST_HEAD(&nr->nr_addrranges);
1017 nr->nr_netstrfns = nf;
1019 nr->nr_netnum = netnum;
1025 * Parses \<nidrange\> token of the syntax.
1027 * \retval 1 if \a src parses to \<addrrange\> '@' \<net\>
1028 * \retval 0 otherwise
1031 parse_nidrange(struct lstr *src, cfs_list_t *nidlist)
1033 struct lstr addrrange, net, tmp;
1034 struct nidrange *nr;
1037 if (gettok(src, '@', &addrrange) == 0)
1040 if (gettok(src, '@', &net) == 0 || src->ls_str != NULL)
1043 nr = add_nidrange(&net, nidlist);
1047 if (!parse_addrange(&addrrange, nr))
1052 CWARN("can't parse nidrange: \"%.*s\"\n", tmp.ls_len, tmp.ls_str);
1057 * Frees range_expr structures of \a list.
1062 free_range_exprs(cfs_list_t *list)
1064 cfs_list_t *pos, *next;
1066 cfs_list_for_each_safe(pos, next, list) {
1068 LIBCFS_FREE(cfs_list_entry(pos, struct range_expr, re_link),
1069 sizeof(struct range_expr));
1074 * Frees numaddr_range structures of \a list.
1076 * For each struct numaddr_range structure found on \a list it frees
1077 * range_expr list attached to it and frees the numddr_range itself.
1082 free_numaddr_ranges(cfs_list_t *list)
1084 cfs_list_t *pos, *next;
1085 struct numaddr_range *numaddr;
1087 cfs_list_for_each_safe(pos, next, list) {
1088 numaddr = cfs_list_entry(pos, struct numaddr_range, nar_link);
1089 free_range_exprs(&numaddr->nar_range_exprs);
1091 LIBCFS_FREE(numaddr, sizeof(struct numaddr_range));
1096 * Frees addrrange structures of \a list.
1098 * For each struct addrrange structure found on \a list it frees
1099 * numaddr_range list attached to it and frees the addrrange itself.
1104 free_addrranges(cfs_list_t *list)
1106 cfs_list_t *pos, *next;
1107 struct addrrange *ar;
1109 cfs_list_for_each_safe(pos, next, list) {
1110 ar = cfs_list_entry(pos, struct addrrange, ar_link);
1111 free_numaddr_ranges(&ar->ar_numaddr_ranges);
1113 LIBCFS_FREE(ar, sizeof(struct addrrange));
1118 * Frees nidrange strutures of \a list.
1120 * For each struct nidrange structure found on \a list it frees
1121 * addrrange list attached to it and frees the nidrange itself.
1126 cfs_free_nidlist(cfs_list_t *list)
1128 cfs_list_t *pos, *next;
1129 struct nidrange *nr;
1131 cfs_list_for_each_safe(pos, next, list) {
1132 nr = cfs_list_entry(pos, struct nidrange, nr_link);
1133 free_addrranges(&nr->nr_addrranges);
1135 LIBCFS_FREE(nr, sizeof(struct nidrange));
1140 * Parses nid range list.
1142 * Parses with rigorous syntax and overflow checking \a str into
1143 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
1144 * structures and links that structure to \a nidlist. The resulting
1145 * list can be used to match a NID againts set of NIDS defined by \a
1147 * \see cfs_match_nid
1149 * \retval 1 on success
1150 * \retval 0 otherwise
1153 cfs_parse_nidlist(char *str, int len, cfs_list_t *nidlist)
1155 struct lstr src, res;
1161 CFS_INIT_LIST_HEAD(nidlist);
1162 while (src.ls_str) {
1163 rc = gettok(&src, ' ', &res);
1165 cfs_free_nidlist(nidlist);
1168 rc = parse_nidrange(&res, nidlist);
1170 cfs_free_nidlist(nidlist);
1178 * Matches address (\a addr) against address set encoded in \a list.
1180 * \see libcfs_num_match(), libcfs_ip_match()
1182 * \retval 1 if \a addr matches
1183 * \retval 0 otherwise
1186 match_numaddr(__u32 addr, cfs_list_t *list, int shift, __u32 mask)
1188 struct numaddr_range *numaddr;
1189 struct range_expr *expr;
1193 cfs_list_for_each_entry(numaddr, list, nar_link) {
1194 ip = (addr >> shift) & mask;
1197 cfs_list_for_each_entry(expr, &numaddr->nar_range_exprs,
1199 if (ip >= expr->re_lo &&
1200 ip <= expr->re_hi &&
1201 ((ip - expr->re_lo) % expr->re_stride) == 0) {
1213 * Nf_match_addr method for networks using numeric addresses
1215 * \retval 1 on match
1216 * \retval 0 otherwise
1219 libcfs_num_match(__u32 addr, cfs_list_t *numaddr)
1221 return match_numaddr(addr, numaddr, 0, 0xffffffff);
1225 * Nf_match_addr method for networks using ip addresses
1227 * \retval 1 on match
1228 * \retval 0 otherwise
1231 libcfs_ip_match(__u32 addr, cfs_list_t *numaddr)
1233 return match_numaddr(addr, numaddr, 24, 0xff);
1237 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
1239 * \see cfs_parse_nidlist()
1241 * \retval 1 on match
1242 * \retval 0 otherwises
1244 int cfs_match_nid(lnet_nid_t nid, cfs_list_t *nidlist)
1246 struct nidrange *nr;
1247 struct addrrange *ar;
1250 cfs_list_for_each_entry(nr, nidlist, nr_link) {
1251 if (nr->nr_netstrfns->nf_type != LNET_NETTYP(LNET_NIDNET(nid)))
1253 if (nr->nr_netnum != LNET_NETNUM(LNET_NIDNET(nid)))
1257 cfs_list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
1258 if (nr->nr_netstrfns->nf_match_addr(LNET_NIDADDR(nid),
1259 &ar->ar_numaddr_ranges))
1267 EXPORT_SYMBOL(libcfs_isknown_lnd);
1268 EXPORT_SYMBOL(libcfs_lnd2modname);
1269 EXPORT_SYMBOL(libcfs_lnd2str);
1270 EXPORT_SYMBOL(libcfs_str2lnd);
1271 EXPORT_SYMBOL(libcfs_net2str);
1272 EXPORT_SYMBOL(libcfs_nid2str);
1273 EXPORT_SYMBOL(libcfs_str2net);
1274 EXPORT_SYMBOL(libcfs_str2nid);
1275 EXPORT_SYMBOL(libcfs_id2str);
1276 EXPORT_SYMBOL(libcfs_str2anynid);
1277 EXPORT_SYMBOL(cfs_iswhite);
1278 EXPORT_SYMBOL(cfs_free_nidlist);
1279 EXPORT_SYMBOL(cfs_parse_nidlist);
1280 EXPORT_SYMBOL(cfs_match_nid);