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 "../../include/linux/libcfs/libcfs.h"
44 #include "../../include/linux/lnet/lnet.h"
46 /* CAVEAT VENDITOR! Keep the canonical string representation of nets/nids
47 * consistent in all conversion functions. Some code fragments are copied
48 * around for the sake of clarity...
51 /* CAVEAT EMPTOR! Racey temporary buffer allocation!
52 * Choose the number of nidstrings to support the MAXIMUM expected number of
53 * concurrent users. If there are more, the returned string will be volatile.
54 * NB this number must allow for a process to be descheduled for a timeslice
55 * between getting its string and using it.
58 static char libcfs_nidstrings[LNET_NIDSTR_COUNT][LNET_NIDSTR_SIZE];
59 static int libcfs_nidstring_idx;
61 static spinlock_t libcfs_nidstring_lock;
63 void libcfs_init_nidstrings(void)
65 spin_lock_init(&libcfs_nidstring_lock);
69 libcfs_next_nidstring(void)
74 spin_lock_irqsave(&libcfs_nidstring_lock, flags);
76 str = libcfs_nidstrings[libcfs_nidstring_idx++];
77 if (libcfs_nidstring_idx == ARRAY_SIZE(libcfs_nidstrings))
78 libcfs_nidstring_idx = 0;
80 spin_unlock_irqrestore(&libcfs_nidstring_lock, flags);
84 static int libcfs_lo_str2addr(const char *str, int nob, __u32 *addr);
85 static void libcfs_ip_addr2str(__u32 addr, char *str);
86 static int libcfs_ip_str2addr(const char *str, int nob, __u32 *addr);
87 static void libcfs_decnum_addr2str(__u32 addr, char *str);
88 static void libcfs_hexnum_addr2str(__u32 addr, char *str);
89 static int libcfs_num_str2addr(const char *str, int nob, __u32 *addr);
90 static int libcfs_num_parse(char *str, int len, struct list_head *list);
91 static int libcfs_num_match(__u32 addr, struct list_head *list);
97 void (*nf_addr2str)(__u32 addr, char *str);
98 int (*nf_str2addr)(const char *str, int nob, __u32 *addr);
99 int (*nf_parse_addrlist)(char *str, int len,
100 struct list_head *list);
101 int (*nf_match_addr)(__u32 addr, struct list_head *list);
104 static struct netstrfns libcfs_netstrfns[] = {
105 {/* .nf_type */ LOLND,
107 /* .nf_modname */ "klolnd",
108 /* .nf_addr2str */ libcfs_decnum_addr2str,
109 /* .nf_str2addr */ libcfs_lo_str2addr,
110 /* .nf_parse_addr*/ libcfs_num_parse,
111 /* .nf_match_addr*/ libcfs_num_match},
112 {/* .nf_type */ SOCKLND,
113 /* .nf_name */ "tcp",
114 /* .nf_modname */ "ksocklnd",
115 /* .nf_addr2str */ libcfs_ip_addr2str,
116 /* .nf_str2addr */ libcfs_ip_str2addr,
117 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
118 /* .nf_match_addr*/ cfs_ip_addr_match},
119 {/* .nf_type */ O2IBLND,
120 /* .nf_name */ "o2ib",
121 /* .nf_modname */ "ko2iblnd",
122 /* .nf_addr2str */ libcfs_ip_addr2str,
123 /* .nf_str2addr */ libcfs_ip_str2addr,
124 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
125 /* .nf_match_addr*/ cfs_ip_addr_match},
126 {/* .nf_type */ CIBLND,
127 /* .nf_name */ "cib",
128 /* .nf_modname */ "kciblnd",
129 /* .nf_addr2str */ libcfs_ip_addr2str,
130 /* .nf_str2addr */ libcfs_ip_str2addr,
131 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
132 /* .nf_match_addr*/ cfs_ip_addr_match},
133 {/* .nf_type */ OPENIBLND,
134 /* .nf_name */ "openib",
135 /* .nf_modname */ "kopeniblnd",
136 /* .nf_addr2str */ libcfs_ip_addr2str,
137 /* .nf_str2addr */ libcfs_ip_str2addr,
138 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
139 /* .nf_match_addr*/ cfs_ip_addr_match},
140 {/* .nf_type */ IIBLND,
141 /* .nf_name */ "iib",
142 /* .nf_modname */ "kiiblnd",
143 /* .nf_addr2str */ libcfs_ip_addr2str,
144 /* .nf_str2addr */ libcfs_ip_str2addr,
145 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
146 /* .nf_match_addr*/ cfs_ip_addr_match},
147 {/* .nf_type */ VIBLND,
148 /* .nf_name */ "vib",
149 /* .nf_modname */ "kviblnd",
150 /* .nf_addr2str */ libcfs_ip_addr2str,
151 /* .nf_str2addr */ libcfs_ip_str2addr,
152 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
153 /* .nf_match_addr*/ cfs_ip_addr_match},
154 {/* .nf_type */ RALND,
156 /* .nf_modname */ "kralnd",
157 /* .nf_addr2str */ libcfs_ip_addr2str,
158 /* .nf_str2addr */ libcfs_ip_str2addr,
159 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
160 /* .nf_match_addr*/ cfs_ip_addr_match},
161 {/* .nf_type */ QSWLND,
162 /* .nf_name */ "elan",
163 /* .nf_modname */ "kqswlnd",
164 /* .nf_addr2str */ libcfs_decnum_addr2str,
165 /* .nf_str2addr */ libcfs_num_str2addr,
166 /* .nf_parse_addrlist*/ libcfs_num_parse,
167 /* .nf_match_addr*/ libcfs_num_match},
168 {/* .nf_type */ GMLND,
170 /* .nf_modname */ "kgmlnd",
171 /* .nf_addr2str */ libcfs_hexnum_addr2str,
172 /* .nf_str2addr */ libcfs_num_str2addr,
173 /* .nf_parse_addrlist*/ libcfs_num_parse,
174 /* .nf_match_addr*/ libcfs_num_match},
175 {/* .nf_type */ MXLND,
177 /* .nf_modname */ "kmxlnd",
178 /* .nf_addr2str */ libcfs_ip_addr2str,
179 /* .nf_str2addr */ libcfs_ip_str2addr,
180 /* .nf_parse_addrlist*/ cfs_ip_addr_parse,
181 /* .nf_match_addr*/ cfs_ip_addr_match},
182 {/* .nf_type */ PTLLND,
183 /* .nf_name */ "ptl",
184 /* .nf_modname */ "kptllnd",
185 /* .nf_addr2str */ libcfs_decnum_addr2str,
186 /* .nf_str2addr */ libcfs_num_str2addr,
187 /* .nf_parse_addrlist*/ libcfs_num_parse,
188 /* .nf_match_addr*/ libcfs_num_match},
189 {/* .nf_type */ GNILND,
190 /* .nf_name */ "gni",
191 /* .nf_modname */ "kgnilnd",
192 /* .nf_addr2str */ libcfs_decnum_addr2str,
193 /* .nf_str2addr */ libcfs_num_str2addr,
194 /* .nf_parse_addrlist*/ libcfs_num_parse,
195 /* .nf_match_addr*/ libcfs_num_match},
196 /* placeholder for net0 alias. It MUST BE THE LAST ENTRY */
200 const int libcfs_nnetstrfns = ARRAY_SIZE(libcfs_netstrfns);
203 libcfs_lo_str2addr(const char *str, int nob, __u32 *addr)
210 libcfs_ip_addr2str(__u32 addr, char *str)
212 #if 0 /* never lookup */
214 snprintf(str, LNET_NIDSTR_SIZE, "%u.%u.%u.%u",
215 (addr >> 24) & 0xff, (addr >> 16) & 0xff,
216 (addr >> 8) & 0xff, addr & 0xff);
219 /* CAVEAT EMPTOR XscanfX
220 * I use "%n" at the end of a sscanf format to detect trailing junk. However
221 * sscanf may return immediately if it sees the terminating '0' in a string, so
222 * I initialise the %n variable to the expected length. If sscanf sets it;
223 * fine, if it doesn't, then the scan ended at the end of the string, which is
227 libcfs_ip_str2addr(const char *str, int nob, __u32 *addr)
233 int n = nob; /* XscanfX */
236 if (sscanf(str, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n) >= 4 &&
238 (a & ~0xff) == 0 && (b & ~0xff) == 0 &&
239 (c & ~0xff) == 0 && (d & ~0xff) == 0) {
240 *addr = ((a<<24)|(b<<16)|(c<<8)|d);
248 libcfs_decnum_addr2str(__u32 addr, char *str)
250 snprintf(str, LNET_NIDSTR_SIZE, "%u", addr);
254 libcfs_hexnum_addr2str(__u32 addr, char *str)
256 snprintf(str, LNET_NIDSTR_SIZE, "0x%x", addr);
260 libcfs_num_str2addr(const char *str, int nob, __u32 *addr)
265 if (sscanf(str, "0x%x%n", addr, &n) >= 1 && n == nob)
269 if (sscanf(str, "0X%x%n", addr, &n) >= 1 && n == nob)
273 if (sscanf(str, "%u%n", addr, &n) >= 1 && n == nob)
280 libcfs_lnd2netstrfns(int lnd)
285 for (i = 0; i < libcfs_nnetstrfns; i++)
286 if (lnd == libcfs_netstrfns[i].nf_type)
287 return &libcfs_netstrfns[i];
293 libcfs_namenum2netstrfns(const char *name)
295 struct netstrfns *nf;
298 for (i = 0; i < libcfs_nnetstrfns; i++) {
299 nf = &libcfs_netstrfns[i];
300 if (nf->nf_type >= 0 &&
301 !strncmp(name, nf->nf_name, strlen(nf->nf_name)))
308 libcfs_name2netstrfns(const char *name)
312 for (i = 0; i < libcfs_nnetstrfns; i++)
313 if (libcfs_netstrfns[i].nf_type >= 0 &&
314 !strcmp(libcfs_netstrfns[i].nf_name, name))
315 return &libcfs_netstrfns[i];
321 libcfs_isknown_lnd(int type)
323 return libcfs_lnd2netstrfns(type) != NULL;
325 EXPORT_SYMBOL(libcfs_isknown_lnd);
328 libcfs_lnd2modname(int lnd)
330 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
332 return (nf == NULL) ? NULL : nf->nf_modname;
334 EXPORT_SYMBOL(libcfs_lnd2modname);
337 libcfs_lnd2str(int lnd)
340 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
345 str = libcfs_next_nidstring();
346 snprintf(str, LNET_NIDSTR_SIZE, "?%u?", lnd);
349 EXPORT_SYMBOL(libcfs_lnd2str);
352 libcfs_str2lnd(const char *str)
354 struct netstrfns *nf = libcfs_name2netstrfns(str);
361 EXPORT_SYMBOL(libcfs_str2lnd);
364 libcfs_net2str(__u32 net)
366 int lnd = LNET_NETTYP(net);
367 int num = LNET_NETNUM(net);
368 struct netstrfns *nf = libcfs_lnd2netstrfns(lnd);
369 char *str = libcfs_next_nidstring();
372 snprintf(str, LNET_NIDSTR_SIZE, "<%u:%u>", lnd, num);
374 snprintf(str, LNET_NIDSTR_SIZE, "%s", nf->nf_name);
376 snprintf(str, LNET_NIDSTR_SIZE, "%s%u", nf->nf_name, num);
380 EXPORT_SYMBOL(libcfs_net2str);
383 libcfs_nid2str(lnet_nid_t nid)
385 __u32 addr = LNET_NIDADDR(nid);
386 __u32 net = LNET_NIDNET(nid);
387 int lnd = LNET_NETTYP(net);
388 int nnum = LNET_NETNUM(net);
389 struct netstrfns *nf;
393 if (nid == LNET_NID_ANY)
396 nf = libcfs_lnd2netstrfns(lnd);
397 str = libcfs_next_nidstring();
400 snprintf(str, LNET_NIDSTR_SIZE, "%x@<%u:%u>", addr, lnd, nnum);
402 nf->nf_addr2str(addr, str);
405 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s",
408 snprintf(str + nob, LNET_NIDSTR_SIZE - nob, "@%s%u",
414 EXPORT_SYMBOL(libcfs_nid2str);
416 static struct netstrfns *
417 libcfs_str2net_internal(const char *str, __u32 *net)
419 struct netstrfns *uninitialized_var(nf);
424 for (i = 0; i < libcfs_nnetstrfns; i++) {
425 nf = &libcfs_netstrfns[i];
426 if (nf->nf_type >= 0 &&
427 !strncmp(str, nf->nf_name, strlen(nf->nf_name)))
431 if (i == libcfs_nnetstrfns)
434 nob = strlen(nf->nf_name);
436 if (strlen(str) == (unsigned int)nob) {
439 if (nf->nf_type == LOLND) /* net number not allowed */
444 if (sscanf(str, "%u%n", &netnum, &i) < 1 ||
445 i != (int)strlen(str))
449 *net = LNET_MKNET(nf->nf_type, netnum);
454 libcfs_str2net(const char *str)
458 if (libcfs_str2net_internal(str, &net) != NULL)
461 return LNET_NIDNET(LNET_NID_ANY);
463 EXPORT_SYMBOL(libcfs_str2net);
466 libcfs_str2nid(const char *str)
468 const char *sep = strchr(str, '@');
469 struct netstrfns *nf;
474 nf = libcfs_str2net_internal(sep + 1, &net);
478 sep = str + strlen(str);
479 net = LNET_MKNET(SOCKLND, 0);
480 nf = libcfs_lnd2netstrfns(SOCKLND);
484 if (!nf->nf_str2addr(str, (int)(sep - str), &addr))
487 return LNET_MKNID(net, addr);
489 EXPORT_SYMBOL(libcfs_str2nid);
492 libcfs_id2str(lnet_process_id_t id)
494 char *str = libcfs_next_nidstring();
496 if (id.pid == LNET_PID_ANY) {
497 snprintf(str, LNET_NIDSTR_SIZE,
498 "LNET_PID_ANY-%s", libcfs_nid2str(id.nid));
502 snprintf(str, LNET_NIDSTR_SIZE, "%s%u-%s",
503 ((id.pid & LNET_PID_USERFLAG) != 0) ? "U" : "",
504 (id.pid & ~LNET_PID_USERFLAG), libcfs_nid2str(id.nid));
507 EXPORT_SYMBOL(libcfs_id2str);
510 libcfs_str2anynid(lnet_nid_t *nidp, const char *str)
512 if (!strcmp(str, "*")) {
513 *nidp = LNET_NID_ANY;
517 *nidp = libcfs_str2nid(str);
518 return *nidp != LNET_NID_ANY;
520 EXPORT_SYMBOL(libcfs_str2anynid);
523 * Nid range list syntax.
526 * <nidlist> :== <nidrange> [ ' ' <nidrange> ]
527 * <nidrange> :== <addrrange> '@' <net>
528 * <addrrange> :== '*' |
531 * <ipaddr_range> :== <cfs_expr_list>.<cfs_expr_list>.<cfs_expr_list>.
533 * <cfs_expr_list> :== <number> |
535 * <expr_list> :== '[' <range_expr> [ ',' <range_expr>] ']'
536 * <range_expr> :== <number> |
537 * <number> '-' <number> |
538 * <number> '-' <number> '/' <number>
539 * <net> :== <netname> | <netname><number>
540 * <netname> :== "lo" | "tcp" | "o2ib" | "cib" | "openib" | "iib" |
541 * "vib" | "ra" | "elan" | "mx" | "ptl"
546 * Structure to represent \<nidrange\> token of the syntax.
548 * One of this is created for each \<net\> parsed.
552 * Link to list of this structures which is built on nid range
555 struct list_head nr_link;
557 * List head for addrrange::ar_link.
559 struct list_head nr_addrranges;
561 * Flag indicating that *@<net> is found.
565 * Pointer to corresponding element of libcfs_netstrfns.
567 struct netstrfns *nr_netstrfns;
569 * Number of network. E.g. 5 if \<net\> is "elan5".
575 * Structure to represent \<addrrange\> token of the syntax.
579 * Link to nidrange::nr_addrranges.
581 struct list_head ar_link;
583 * List head for cfs_expr_list::el_list.
585 struct list_head ar_numaddr_ranges;
589 * Nf_parse_addrlist method for networks using numeric addresses.
591 * Examples of such networks are gm and elan.
593 * \retval 0 if \a str parsed to numeric address
594 * \retval errno otherwise
597 libcfs_num_parse(char *str, int len, struct list_head *list)
599 struct cfs_expr_list *el;
602 rc = cfs_expr_list_parse(str, len, 0, MAX_NUMERIC_VALUE, &el);
604 list_add_tail(&el->el_link, list);
610 * Parses \<addrrange\> token on the syntax.
612 * Allocates struct addrrange and links to \a nidrange via
613 * (nidrange::nr_addrranges)
615 * \retval 1 if \a src parses to '*' | \<ipaddr_range\> | \<cfs_expr_list\>
616 * \retval 0 otherwise
619 parse_addrange(const struct cfs_lstr *src, struct nidrange *nidrange)
621 struct addrrange *addrrange;
623 if (src->ls_len == 1 && src->ls_str[0] == '*') {
624 nidrange->nr_all = 1;
628 LIBCFS_ALLOC(addrrange, sizeof(struct addrrange));
629 if (addrrange == NULL)
631 list_add_tail(&addrrange->ar_link, &nidrange->nr_addrranges);
632 INIT_LIST_HEAD(&addrrange->ar_numaddr_ranges);
634 return nidrange->nr_netstrfns->nf_parse_addrlist(src->ls_str,
636 &addrrange->ar_numaddr_ranges);
640 * Finds or creates struct nidrange.
642 * Checks if \a src is a valid network name, looks for corresponding
643 * nidrange on the ist of nidranges (\a nidlist), creates new struct
644 * nidrange if it is not found.
646 * \retval pointer to struct nidrange matching network specified via \a src
647 * \retval NULL if \a src does not match any network
649 static struct nidrange *
650 add_nidrange(const struct cfs_lstr *src,
651 struct list_head *nidlist)
653 struct netstrfns *nf;
658 if (src->ls_len >= LNET_NIDSTR_SIZE)
661 nf = libcfs_namenum2netstrfns(src->ls_str);
664 endlen = src->ls_len - strlen(nf->nf_name);
666 /* network name only, e.g. "elan" or "tcp" */
669 /* e.g. "elan25" or "tcp23", refuse to parse if
670 * network name is not appended with decimal or
671 * hexadecimal number */
672 if (!cfs_str2num_check(src->ls_str + strlen(nf->nf_name),
673 endlen, &netnum, 0, MAX_NUMERIC_VALUE))
677 list_for_each_entry(nr, nidlist, nr_link) {
678 if (nr->nr_netstrfns != nf)
680 if (nr->nr_netnum != netnum)
685 LIBCFS_ALLOC(nr, sizeof(struct nidrange));
688 list_add_tail(&nr->nr_link, nidlist);
689 INIT_LIST_HEAD(&nr->nr_addrranges);
690 nr->nr_netstrfns = nf;
692 nr->nr_netnum = netnum;
698 * Parses \<nidrange\> token of the syntax.
700 * \retval 1 if \a src parses to \<addrrange\> '@' \<net\>
701 * \retval 0 otherwise
704 parse_nidrange(struct cfs_lstr *src, struct list_head *nidlist)
706 struct cfs_lstr addrrange;
712 if (cfs_gettok(src, '@', &addrrange) == 0)
715 if (cfs_gettok(src, '@', &net) == 0 || src->ls_str != NULL)
718 nr = add_nidrange(&net, nidlist);
722 if (parse_addrange(&addrrange, nr) != 0)
727 CWARN("can't parse nidrange: \"%.*s\"\n", tmp.ls_len, tmp.ls_str);
732 * Frees addrrange structures of \a list.
734 * For each struct addrrange structure found on \a list it frees
735 * cfs_expr_list list attached to it and frees the addrrange itself.
740 free_addrranges(struct list_head *list)
742 while (!list_empty(list)) {
743 struct addrrange *ar;
745 ar = list_entry(list->next, struct addrrange, ar_link);
747 cfs_expr_list_free_list(&ar->ar_numaddr_ranges);
748 list_del(&ar->ar_link);
749 LIBCFS_FREE(ar, sizeof(struct addrrange));
754 * Frees nidrange strutures of \a list.
756 * For each struct nidrange structure found on \a list it frees
757 * addrrange list attached to it and frees the nidrange itself.
762 cfs_free_nidlist(struct list_head *list)
764 struct list_head *pos, *next;
767 list_for_each_safe(pos, next, list) {
768 nr = list_entry(pos, struct nidrange, nr_link);
769 free_addrranges(&nr->nr_addrranges);
771 LIBCFS_FREE(nr, sizeof(struct nidrange));
774 EXPORT_SYMBOL(cfs_free_nidlist);
777 * Parses nid range list.
779 * Parses with rigorous syntax and overflow checking \a str into
780 * \<nidrange\> [ ' ' \<nidrange\> ], compiles \a str into set of
781 * structures and links that structure to \a nidlist. The resulting
782 * list can be used to match a NID againts set of NIDS defined by \a
786 * \retval 1 on success
787 * \retval 0 otherwise
790 cfs_parse_nidlist(char *str, int len, struct list_head *nidlist)
798 INIT_LIST_HEAD(nidlist);
800 rc = cfs_gettok(&src, ' ', &res);
802 cfs_free_nidlist(nidlist);
805 rc = parse_nidrange(&res, nidlist);
807 cfs_free_nidlist(nidlist);
813 EXPORT_SYMBOL(cfs_parse_nidlist);
816 * Nf_match_addr method for networks using numeric addresses
819 * \retval 0 otherwise
822 libcfs_num_match(__u32 addr, struct list_head *numaddr)
824 struct cfs_expr_list *el;
826 LASSERT(!list_empty(numaddr));
827 el = list_entry(numaddr->next, struct cfs_expr_list, el_link);
829 return cfs_expr_list_match(addr, el);
833 * Matches a nid (\a nid) against the compiled list of nidranges (\a nidlist).
835 * \see cfs_parse_nidlist()
838 * \retval 0 otherwises
840 int cfs_match_nid(lnet_nid_t nid, struct list_head *nidlist)
843 struct addrrange *ar;
845 list_for_each_entry(nr, nidlist, nr_link) {
846 if (nr->nr_netstrfns->nf_type != LNET_NETTYP(LNET_NIDNET(nid)))
848 if (nr->nr_netnum != LNET_NETNUM(LNET_NIDNET(nid)))
852 list_for_each_entry(ar, &nr->nr_addrranges, ar_link)
853 if (nr->nr_netstrfns->nf_match_addr(LNET_NIDADDR(nid),
854 &ar->ar_numaddr_ranges))
859 EXPORT_SYMBOL(cfs_match_nid);