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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
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>
41 #define DEBUG_SUBSYSTEM S_LNET
43 #include <libcfs/libcfs.h>
44 #include <lnet/lnet.h>
46 #ifdef HAVE_GETHOSTBYNAME
51 /* CAVEAT VENDITOR! Keep the canonical string representation of nets/nids
52 * consistent in all conversion functions. Some code fragments are copied
53 * around for the sake of clarity...
56 /* CAVEAT EMPTOR! Racey temporary buffer allocation!
57 * Choose the number of nidstrings to support the MAXIMUM expected number of
58 * concurrent users. If there are more, the returned string will be volatile.
59 * NB this number must allow for a process to be descheduled for a timeslice
60 * between getting its string and using it.
63 static char libcfs_nidstrings[LNET_NIDSTR_COUNT][LNET_NIDSTR_SIZE];
64 static int libcfs_nidstring_idx = 0;
67 static spinlock_t libcfs_nidstring_lock;
69 void libcfs_init_nidstrings (void)
71 spin_lock_init(&libcfs_nidstring_lock);
74 # define NIDSTR_LOCK(f) spin_lock_irqsave(&libcfs_nidstring_lock, f)
75 # define NIDSTR_UNLOCK(f) spin_unlock_irqrestore(&libcfs_nidstring_lock, f)
77 # define NIDSTR_LOCK(f) (f=sizeof(f)) /* avoid set-but-unused warnings */
78 # define NIDSTR_UNLOCK(f) (f=sizeof(f))
82 libcfs_next_nidstring (void)
89 str = libcfs_nidstrings[libcfs_nidstring_idx++];
90 if (libcfs_nidstring_idx ==
91 sizeof(libcfs_nidstrings)/sizeof(libcfs_nidstrings[0]))
92 libcfs_nidstring_idx = 0;
98 static int libcfs_lo_str2addr(const char *str, int nob, __u32 *addr);
99 static void libcfs_ip_addr2str(__u32 addr, char *str);
100 static int libcfs_ip_str2addr(const char *str, int nob, __u32 *addr);
101 static void libcfs_decnum_addr2str(__u32 addr, char *str);
102 static void libcfs_hexnum_addr2str(__u32 addr, char *str);
103 static int libcfs_num_str2addr(const char *str, int nob, __u32 *addr);
104 static int libcfs_num_parse(char *str, int len, struct list_head *list);
105 static int libcfs_num_match(__u32 addr, struct list_head *list);
106 static int libcfs_num_addr_range_print(char *buffer, int count,
107 struct list_head *list);
108 static int libcfs_ip_addr_range_print(char *buffer, int count,
109 struct list_head *list);
115 void (*nf_addr2str)(__u32 addr, char *str);
116 int (*nf_str2addr)(const char *str, int nob, __u32 *addr);
117 int (*nf_parse_addrlist)(char *str, int len,
118 struct list_head *list);
119 int (*nf_print_addrlist)(char *buffer, int count,
120 struct list_head *list);
121 int (*nf_match_addr)(__u32 addr, struct list_head *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_print_addrlist*/ libcfs_num_addr_range_print,
132 /* .nf_match_addr*/ libcfs_num_match},
133 {/* .nf_type */ SOCKLND,
134 /* .nf_name */ "tcp",
135 /* .nf_modname */ "ksocklnd",
136 /* .nf_addr2str */ libcfs_ip_addr2str,
137 /* .nf_str2addr */ libcfs_ip_str2addr,
138 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
139 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
140 /* .nf_match_addr*/ cfs_ip_addr_match},
141 {/* .nf_type */ O2IBLND,
142 /* .nf_name */ "o2ib",
143 /* .nf_modname */ "ko2iblnd",
144 /* .nf_addr2str */ libcfs_ip_addr2str,
145 /* .nf_str2addr */ libcfs_ip_str2addr,
146 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
147 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
148 /* .nf_match_addr*/ cfs_ip_addr_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*/ cfs_ip_addr_parse,
155 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
156 /* .nf_match_addr*/ cfs_ip_addr_match},
157 {/* .nf_type */ OPENIBLND,
158 /* .nf_name */ "openib",
159 /* .nf_modname */ "kopeniblnd",
160 /* .nf_addr2str */ libcfs_ip_addr2str,
161 /* .nf_str2addr */ libcfs_ip_str2addr,
162 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
163 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
164 /* .nf_match_addr*/ cfs_ip_addr_match},
165 {/* .nf_type */ IIBLND,
166 /* .nf_name */ "iib",
167 /* .nf_modname */ "kiiblnd",
168 /* .nf_addr2str */ libcfs_ip_addr2str,
169 /* .nf_str2addr */ libcfs_ip_str2addr,
170 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
171 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
172 /* .nf_match_addr*/ cfs_ip_addr_match},
173 {/* .nf_type */ VIBLND,
174 /* .nf_name */ "vib",
175 /* .nf_modname */ "kviblnd",
176 /* .nf_addr2str */ libcfs_ip_addr2str,
177 /* .nf_str2addr */ libcfs_ip_str2addr,
178 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
179 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
180 /* .nf_match_addr*/ cfs_ip_addr_match},
181 {/* .nf_type */ RALND,
183 /* .nf_modname */ "kralnd",
184 /* .nf_addr2str */ libcfs_ip_addr2str,
185 /* .nf_str2addr */ libcfs_ip_str2addr,
186 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
187 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
188 /* .nf_match_addr*/ cfs_ip_addr_match},
189 {/* .nf_type */ QSWLND,
190 /* .nf_name */ "elan",
191 /* .nf_modname */ "kqswlnd",
192 /* .nf_addr2str */ libcfs_decnum_addr2str,
193 /* .nf_str2addr */ libcfs_num_str2addr,
194 /* .nf_parse_addrlist*/ libcfs_num_parse,
195 /* .nf_print_addrlist*/ libcfs_num_addr_range_print,
196 /* .nf_match_addr*/ libcfs_num_match},
197 {/* .nf_type */ GMLND,
199 /* .nf_modname */ "kgmlnd",
200 /* .nf_addr2str */ libcfs_hexnum_addr2str,
201 /* .nf_str2addr */ libcfs_num_str2addr,
202 /* .nf_parse_addrlist*/ libcfs_num_parse,
203 /* .nf_print_addrlist*/ libcfs_num_addr_range_print,
204 /* .nf_match_addr*/ libcfs_num_match},
205 {/* .nf_type */ MXLND,
207 /* .nf_modname */ "kmxlnd",
208 /* .nf_addr2str */ libcfs_ip_addr2str,
209 /* .nf_str2addr */ libcfs_ip_str2addr,
210 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
211 /* .nf_print_addrlist*/ libcfs_ip_addr_range_print,
212 /* .nf_match_addr*/ cfs_ip_addr_match},
213 {/* .nf_type */ PTLLND,
214 /* .nf_name */ "ptl",
215 /* .nf_modname */ "kptllnd",
216 /* .nf_addr2str */ libcfs_decnum_addr2str,
217 /* .nf_str2addr */ libcfs_num_str2addr,
218 /* .nf_parse_addrlist*/ libcfs_num_parse,
219 /* .nf_print_addrlist*/ libcfs_num_addr_range_print,
220 /* .nf_match_addr*/ libcfs_num_match},
221 {/* .nf_type */ GNILND,
222 /* .nf_name */ "gni",
223 /* .nf_modname */ "kgnilnd",
224 /* .nf_addr2str */ libcfs_decnum_addr2str,
225 /* .nf_str2addr */ libcfs_num_str2addr,
226 /* .nf_parse_addrlist*/ libcfs_num_parse,
227 /* .nf_print_addrlist*/ libcfs_num_addr_range_print,
228 /* .nf_match_addr*/ libcfs_num_match},
229 {/* .nf_type */ GNIIPLND,
230 /* .nf_name */ "gip",
231 /* .nf_modname */ "kgnilnd",
232 /* .nf_addr2str */ libcfs_ip_addr2str,
233 /* .nf_str2addr */ libcfs_ip_str2addr,
234 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
235 /* .nf_match_addr*/ cfs_ip_addr_match},
236 /* placeholder for net0 alias. It MUST BE THE LAST ENTRY */
240 const int libcfs_nnetstrfns = sizeof(libcfs_netstrfns)/sizeof(libcfs_netstrfns[0]);
243 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
250 libcfs_ip_addr2str(__u32 addr, char *str)
252 #if 0 /* never lookup */
253 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
254 __u32 netip = htonl(addr);
255 struct hostent *he = gethostbyaddr(&netip, sizeof(netip), AF_INET);
258 snprintf(str, LNET_NIDSTR_SIZE, "%s", he->h_name);
263 snprintf(str, LNET_NIDSTR_SIZE, "%u.%u.%u.%u",
264 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
265 (addr >> 8) & 0xff, addr & 0xff);
268 /* CAVEAT EMPTOR XscanfX
269 * I use "%n" at the end of a sscanf format to detect trailing junk. However
270 * sscanf may return immediately if it sees the terminating '0' in a string, so
271 * I initialise the %n variable to the expected length. If sscanf sets it;
272 * fine, if it doesn't, then the scan ended at the end of the string, which is
276 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
282 int n = nob; /* XscanfX */
285 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
287 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
288 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
289 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
293 #if !defined(__KERNEL__) && defined HAVE_GETHOSTBYNAME
294 /* known hostname? */
295 if (('a' <= str[0] && str[0] <= 'z') ||
296 ('A' <= str[0] && str[0] <= 'Z')) {
299 LIBCFS_ALLOC(tmp, nob + 1);
303 memcpy(tmp, str, nob);
306 he = gethostbyname(tmp);
308 LIBCFS_FREE(tmp, nob);
311 __u32 ip = *(__u32 *)he->h_addr;
323 libcfs_decnum_addr2str(__u32 addr, char *str)
325 snprintf(str, LNET_NIDSTR_SIZE, "%u", addr);
329 libcfs_hexnum_addr2str(__u32 addr, char *str)
331 snprintf(str, LNET_NIDSTR_SIZE, "0x%x", addr);
335 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
340 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
344 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
348 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
355 libcfs_lnd2netstrfns(int lnd)
360 for (i = 0; i < libcfs_nnetstrfns; i++)
361 if (lnd == libcfs_netstrfns[i].nf_type)
362 return &libcfs_netstrfns[i];
368 libcfs_namenum2netstrfns(const char *name)
370 struct netstrfns *nf;
373 for (i = 0; i < libcfs_nnetstrfns; i++) {
374 nf = &libcfs_netstrfns[i];
375 if (nf->nf_type >= 0 &&
376 !strncmp(name, nf->nf_name, strlen(nf->nf_name)))
383 libcfs_name2netstrfns(const char *name)
387 for (i = 0; i < libcfs_nnetstrfns; i++)
388 if (libcfs_netstrfns[i].nf_type >= 0 &&
389 !strcmp(libcfs_netstrfns[i].nf_name, name))
390 return &libcfs_netstrfns[i];
396 libcfs_isknown_lnd(int type)
398 return libcfs_lnd2netstrfns(type) != NULL;
402 libcfs_lnd2modname(int lnd)
404 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
406 return (nf == NULL) ? NULL : nf->nf_modname;
410 libcfs_lnd2str(int lnd)
413 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
418 str = libcfs_next_nidstring();
419 snprintf(str, LNET_NIDSTR_SIZE, "?%u?", lnd);
424 libcfs_str2lnd(const char *str)
426 struct netstrfns *nf = libcfs_name2netstrfns(str);
435 libcfs_net2str(__u32 net)
437 int lnd = LNET_NETTYP(net);
438 int num = LNET_NETNUM(net);
439 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
440 char *str = libcfs_next_nidstring();
443 snprintf(str, LNET_NIDSTR_SIZE, "<%u:%u>", lnd, num);
445 snprintf(str, LNET_NIDSTR_SIZE, "%s", nf->nf_name);
447 snprintf(str, LNET_NIDSTR_SIZE, "%s%u", nf->nf_name, num);
453 libcfs_nid2str(lnet_nid_t nid)
455 __u32 addr = LNET_NIDADDR(nid);
456 __u32 net = LNET_NIDNET(nid);
457 int lnd = LNET_NETTYP(net);
458 int nnum = LNET_NETNUM(net);
459 struct netstrfns *nf;
463 if (nid == LNET_NID_ANY)
466 nf = libcfs_lnd2netstrfns(lnd);
467 str = libcfs_next_nidstring();
470 snprintf(str, LNET_NIDSTR_SIZE, "%x@<%u:%u>", addr, lnd, nnum);
472 nf->nf_addr2str(addr, str);
475 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s",
478 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s%u",
485 static struct netstrfns *
486 libcfs_str2net_internal(const char *str, __u32 *net)
488 struct netstrfns *nf = NULL;
493 for (i = 0; i < libcfs_nnetstrfns; i++) {
494 nf = &libcfs_netstrfns[i];
495 if (nf->nf_type >= 0 &&
496 !strncmp(str, nf->nf_name, strlen(nf->nf_name)))
500 if (i == libcfs_nnetstrfns)
503 nob = strlen(nf->nf_name);
505 if (strlen(str) == (unsigned int)nob) {
508 if (nf->nf_type == LOLND) /* net number not allowed */
513 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
514 i != (int)strlen(str))
518 *net = LNET_MKNET(nf->nf_type, netnum);
523 libcfs_str2net(const char *str)
527 if (libcfs_str2net_internal(str, &net) != NULL)
530 return LNET_NIDNET(LNET_NID_ANY);
534 libcfs_str2nid(const char *str)
536 const char *sep = strchr(str, '@');
537 struct netstrfns *nf;
542 nf = libcfs_str2net_internal(sep + 1, &net);
546 sep = str + strlen(str);
547 net = LNET_MKNET(SOCKLND, 0);
548 nf = libcfs_lnd2netstrfns(SOCKLND);
549 LASSERT (nf != NULL);
552 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
555 return LNET_MKNID(net, addr);
559 libcfs_id2str(lnet_process_id_t id)
561 char *str = libcfs_next_nidstring();
563 if (id.pid == LNET_PID_ANY) {
564 snprintf(str, LNET_NIDSTR_SIZE,
565 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
569 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
570 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
571 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
576 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
578 if (!strcmp(str, "*")) {
579 *nidp = LNET_NID_ANY;
583 *nidp = libcfs_str2nid(str);
584 return *nidp != LNET_NID_ANY;
588 * Nid range list syntax.
591 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
592 * <nidrange> :== <addrrange> '@' <net>
593 * <addrrange> :== '*' |
596 * <ipaddr_range> :== <cfs_expr_list>.<cfs_expr_list>.<cfs_expr_list>.
598 * <cfs_expr_list> :== <number> |
600 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
601 * <range_expr> :== <number> |
602 * <number> '-' <number> |
603 * <number> '-' <number> '/' <number>
604 * <net> :== <netname> | <netname><number>
605 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
606 * "vib" | "ra" | "elan" | "mx" | "ptl"
611 * Structure to represent \<nidrange\> token of the syntax.
613 * One of this is created for each \<net\> parsed.
617 * Link to list of this structures which is built on nid range
620 struct list_head nr_link;
622 * List head for addrrange::ar_link.
624 struct list_head nr_addrranges;
626 * Flag indicating that *@<net> is found.
630 * Pointer to corresponding element of libcfs_netstrfns.
632 struct netstrfns *nr_netstrfns;
634 * Number of network. E.g. 5 if \<net\> is "elan5".
640 * Structure to represent \<addrrange\> token of the syntax.
644 * Link to nidrange::nr_addrranges.
646 struct list_head ar_link;
648 * List head for cfs_expr_list::el_list.
650 struct list_head ar_numaddr_ranges;
654 * Nf_parse_addrlist method for networks using numeric addresses.
656 * Examples of such networks are gm and elan.
658 * \retval 0 if \a str parsed to numeric address
659 * \retval errno otherwise
662 libcfs_num_parse(char *str, int len, struct list_head *list)
664 struct cfs_expr_list *el;
667 rc = cfs_expr_list_parse(str, len, 0, MAX_NUMERIC_VALUE, &el);
669 list_add_tail(&el->el_link, list);
675 * Parses \<addrrange\> token on the syntax.
677 * Allocates struct addrrange and links to \a nidrange via
678 * (nidrange::nr_addrranges)
680 * \retval 0 if \a src parses to '*' | \<ipaddr_range\> | \<cfs_expr_list\>
681 * \retval -errno otherwise
684 parse_addrange(const struct cfs_lstr *src, struct nidrange *nidrange)
686 struct addrrange *addrrange;
688 if (src->ls_len == 1 && src->ls_str[0] == '*') {
689 nidrange->nr_all = 1;
693 LIBCFS_ALLOC(addrrange, sizeof(struct addrrange));
694 if (addrrange == NULL)
696 list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
697 INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
699 return nidrange->nr_netstrfns->nf_parse_addrlist(src->ls_str,
701 &addrrange->ar_numaddr_ranges);
705 * Finds or creates struct nidrange.
707 * Checks if \a src is a valid network name, looks for corresponding
708 * nidrange on the ist of nidranges (\a nidlist), creates new struct
709 * nidrange if it is not found.
711 * \retval pointer to struct nidrange matching network specified via \a src
712 * \retval NULL if \a src does not match any network
714 static struct nidrange *
715 add_nidrange(const struct cfs_lstr *src,
716 struct list_head *nidlist)
718 struct netstrfns *nf;
723 if (src->ls_len >= LNET_NIDSTR_SIZE)
726 nf = libcfs_namenum2netstrfns(src->ls_str);
729 endlen = src->ls_len - strlen(nf->nf_name);
731 /* network name only, e.g. "elan" or "tcp" */
734 /* e.g. "elan25" or "tcp23", refuse to parse if
735 * network name is not appended with decimal or
736 * hexadecimal number */
737 if (!cfs_str2num_check(src->ls_str + strlen(nf->nf_name),
738 endlen, &netnum, 0, MAX_NUMERIC_VALUE))
742 list_for_each_entry(nr, nidlist, nr_link) {
743 if (nr->nr_netstrfns != nf)
745 if (nr->nr_netnum != netnum)
750 LIBCFS_ALLOC(nr, sizeof(struct nidrange));
753 list_add_tail(&nr->nr_link, nidlist);
754 INIT_LIST_HEAD(&nr->nr_addrranges);
755 nr->nr_netstrfns = nf;
757 nr->nr_netnum = netnum;
763 * Parses \<nidrange\> token of the syntax.
765 * \retval 1 if \a src parses to \<addrrange\> '@' \<net\>
766 * \retval 0 otherwise
769 parse_nidrange(struct cfs_lstr *src, struct list_head *nidlist)
771 struct cfs_lstr addrrange;
777 if (cfs_gettok(src, '@', &addrrange) == 0)
780 if (cfs_gettok(src, '@', &net) == 0 || src->ls_str != NULL)
783 nr = add_nidrange(&net, nidlist);
787 if (parse_addrange(&addrrange, nr) != 0)
792 CWARN("can't parse nidrange: \"%.*s\"\n", tmp.ls_len, tmp.ls_str);
797 * Frees addrrange structures of \a list.
799 * For each struct addrrange structure found on \a list it frees
800 * cfs_expr_list list attached to it and frees the addrrange itself.
805 free_addrranges(struct list_head *list)
807 while (!list_empty(list)) {
808 struct addrrange *ar;
810 ar = list_entry(list->next, struct addrrange, ar_link);
812 cfs_expr_list_free_list(&ar->ar_numaddr_ranges);
813 list_del(&ar->ar_link);
814 LIBCFS_FREE(ar, sizeof(struct addrrange));
819 * Frees nidrange strutures of \a list.
821 * For each struct nidrange structure found on \a list it frees
822 * addrrange list attached to it and frees the nidrange itself.
827 cfs_free_nidlist(struct list_head *list)
829 struct list_head *pos, *next;
832 list_for_each_safe(pos, next, list) {
833 nr = list_entry(pos, struct nidrange, nr_link);
834 free_addrranges(&nr->nr_addrranges);
836 LIBCFS_FREE(nr, sizeof(struct nidrange));
841 * Parses nid range list.
843 * Parses with rigorous syntax and overflow checking \a str into
844 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
845 * structures and links that structure to \a nidlist. The resulting
846 * list can be used to match a NID againts set of NIDS defined by \a
850 * \retval 1 on success
851 * \retval 0 otherwise
854 cfs_parse_nidlist(char *str, int len, struct list_head *nidlist)
863 INIT_LIST_HEAD(nidlist);
865 rc = cfs_gettok(&src, ' ', &res);
867 cfs_free_nidlist(nidlist);
870 rc = parse_nidrange(&res, nidlist);
872 cfs_free_nidlist(nidlist);
880 * Nf_match_addr method for networks using numeric addresses
883 * \retval 0 otherwise
886 libcfs_num_match(__u32 addr, struct list_head *numaddr)
888 struct cfs_expr_list *el;
890 LASSERT(!list_empty(numaddr));
891 el = list_entry(numaddr->next, struct cfs_expr_list, el_link);
893 return cfs_expr_list_match(addr, el);
897 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
899 * \see cfs_parse_nidlist()
902 * \retval 0 otherwises
904 int cfs_match_nid(lnet_nid_t nid, struct list_head *nidlist)
907 struct addrrange *ar;
910 list_for_each_entry(nr, nidlist, nr_link) {
911 if (nr->nr_netstrfns->nf_type != LNET_NETTYP(LNET_NIDNET(nid)))
913 if (nr->nr_netnum != LNET_NETNUM(LNET_NIDNET(nid)))
917 list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
918 if (nr->nr_netstrfns->nf_match_addr(LNET_NIDADDR(nid),
919 &ar->ar_numaddr_ranges))
926 libcfs_num_addr_range_print(char *buffer, int count, struct list_head *list)
929 struct cfs_expr_list *el;
931 list_for_each_entry(el, list, el_link) {
933 i += cfs_expr_list_print(buffer + i, count - i, el);
939 libcfs_ip_addr_range_print(char *buffer, int count, struct list_head *list)
942 struct cfs_expr_list *el;
944 list_for_each_entry(el, list, el_link) {
947 i += cfs_snprintf(buffer + i, count - i, ".");
948 i += cfs_expr_list_print(buffer + i, count - i, el);
955 * Print the network part of the nidrange \a nr into the specified \a buffer.
957 * \retval number of characters written
960 cfs_print_network(char *buffer, int count, struct nidrange *nr)
962 struct netstrfns *nf = nr->nr_netstrfns;
964 if (nr->nr_netnum == 0)
965 return cfs_snprintf(buffer, count, "@%s", nf->nf_name);
967 return cfs_snprintf(buffer, count, "@%s%u",
968 nf->nf_name, nr->nr_netnum);
973 * Print a list of addrrange (\a addrranges) into the specified \a buffer.
974 * At max \a count characters can be printed into \a buffer.
976 * \retval number of characters written
979 cfs_print_addrranges(char *buffer, int count, struct list_head *addrranges,
983 struct addrrange *ar;
984 struct netstrfns *nf = nr->nr_netstrfns;
986 list_for_each_entry(ar, addrranges, ar_link) {
988 i += cfs_snprintf(buffer + i, count - i, " ");
989 i += nf->nf_print_addrlist(buffer + i, count - i,
990 &ar->ar_numaddr_ranges);
991 i += cfs_print_network(buffer + i, count - i, nr);
998 * Print a list of nidranges (\a nidlist) into the specified \a buffer.
999 * At max \a count characters can be printed into \a buffer.
1000 * Nidranges are separated by a space character.
1002 * \retval number of characters written
1004 int cfs_print_nidlist(char *buffer, int count, struct list_head *nidlist)
1007 struct nidrange *nr;
1013 list_for_each_entry(nr, nidlist, nr_link) {
1015 i += cfs_snprintf(buffer + i, count - i, " ");
1017 if (nr->nr_all != 0) {
1018 LASSERT(list_empty(&nr->nr_addrranges));
1019 i += cfs_snprintf(buffer + i, count - i, "*");
1020 i += cfs_print_network(buffer + i, count - i, nr);
1022 i += cfs_print_addrranges(buffer + i, count - i,
1023 &nr->nr_addrranges, nr);
1031 EXPORT_SYMBOL(libcfs_isknown_lnd);
1032 EXPORT_SYMBOL(libcfs_lnd2modname);
1033 EXPORT_SYMBOL(libcfs_lnd2str);
1034 EXPORT_SYMBOL(libcfs_str2lnd);
1035 EXPORT_SYMBOL(libcfs_net2str);
1036 EXPORT_SYMBOL(libcfs_nid2str);
1037 EXPORT_SYMBOL(libcfs_str2net);
1038 EXPORT_SYMBOL(libcfs_str2nid);
1039 EXPORT_SYMBOL(libcfs_id2str);
1040 EXPORT_SYMBOL(libcfs_str2anynid);
1041 EXPORT_SYMBOL(cfs_free_nidlist);
1042 EXPORT_SYMBOL(cfs_parse_nidlist);
1043 EXPORT_SYMBOL(cfs_print_nidlist);
1044 EXPORT_SYMBOL(cfs_match_nid);