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[fs/lustre-release.git] / lnet / utils / lnetconfig / liblnetconfig.c
1 /*
2  * LGPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU Lesser General Public License as
8  * published by the Free Software Foundation; either version 2.1 of the
9  * License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
18  *
19  * LGPL HEADER END
20  *
21  * Copyright (c) 2014, 2017, Intel Corporation.
22  *
23  * Author:
24  *   Amir Shehata <amir.shehata@intel.com>
25  */
26
27 /*
28  * There are two APIs:
29  *  1. APIs that take the actual parameters expanded.  This is for other
30  *  entities that would like to link against the library and call the APIs
31  *  directly without having to form an intermediate representation.
32  *  2. APIs that take a YAML file and parses out the information there and
33  *  calls the APIs mentioned in 1
34  */
35
36 #include <errno.h>
37 #include <limits.h>
38 #include <byteswap.h>
39 #include <netdb.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <unistd.h>
44 #include <sys/ioctl.h>
45 #include <net/if.h>
46 #include <libcfs/util/ioctl.h>
47 #include <linux/lnet/lnetctl.h>
48 #include "liblnd.h"
49 #include <sys/types.h>
50 #include <sys/stat.h>
51 #include <fcntl.h>
52 #include <ifaddrs.h>
53 #include <rdma/rdma_user_cm.h>
54 #include "liblnetconfig.h"
55 #include <glob.h>
56 #include <libcfs/util/param.h>
57
58 #ifndef HAVE_USRSPC_RDMA_PS_TCP
59 #define RDMA_PS_TCP 0x0106
60 #endif
61
62 const char *gmsg_stat_names[] = {"sent_stats", "received_stats",
63                                  "dropped_stats"};
64
65 /*
66  * lustre_lnet_ip_range_descr
67  *      Describes an IP range.
68  *      Each octect is an expression
69  */
70 struct lustre_lnet_ip_range_descr {
71         struct list_head ipr_entry;
72         struct list_head ipr_expr;
73 };
74
75 /*
76  * lustre_lnet_ip2nets
77  *      Describes an ip2nets rule. This can be on a list of rules.
78  */
79 struct lustre_lnet_ip2nets {
80         struct lnet_dlc_network_descr ip2nets_net;
81         struct list_head ip2nets_ip_ranges;
82 };
83
84 int open_sysfs_file(const char *path, const char *attr, const int mode)
85 {
86         int fd;
87         char filename[LNET_MAX_STR_LEN];
88
89         if (strlen(path) + strlen(attr) >= LNET_MAX_STR_LEN)
90                 return -1;
91
92         snprintf(filename, sizeof(filename), "%s%s",
93                  path, attr);
94
95         fd = open(filename, mode);
96
97         return fd;
98 }
99
100 static int read_sysfs_file(const char *path, const char *attr,
101                            void *val, const size_t size, const int nelem)
102 {
103         int fd;
104         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
105
106         fd = open_sysfs_file(path, attr, O_RDONLY);
107         if (fd == -1)
108                 return LUSTRE_CFG_RC_NO_MATCH;
109
110         if (read(fd, val, size * nelem) == -1)
111                 goto close_fd;
112
113         rc = LUSTRE_CFG_RC_NO_ERR;
114
115 close_fd:
116         close(fd);
117         return rc;
118 }
119
120 static int write_sysfs_file(const char *path, const char *attr,
121                             void *val, const size_t size, const int nelem)
122 {
123         int fd;
124         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
125
126         fd = open_sysfs_file(path, attr, O_WRONLY | O_TRUNC);
127         if (fd == -1)
128                 return LUSTRE_CFG_RC_NO_MATCH;
129
130         if (write(fd, val, size * nelem) == -1)
131                 goto close_fd;
132
133         rc = LUSTRE_CFG_RC_NO_ERR;
134
135 close_fd:
136         close(fd);
137         return rc;
138 }
139
140 /*
141  * free_intf_descr
142  *      frees the memory allocated for an intf descriptor.
143  */
144 void free_intf_descr(struct lnet_dlc_intf_descr *intf_descr)
145 {
146         if (!intf_descr)
147                 return;
148
149         if (intf_descr->cpt_expr != NULL)
150                 cfs_expr_list_free(intf_descr->cpt_expr);
151         free(intf_descr);
152 }
153
154 /*
155  * lustre_lnet_add_ip_range
156  * Formatting:
157  *      given a string of the format:
158  *      <expr.expr.expr.expr> parse each expr into
159  *      a lustre_lnet_ip_range_descr structure and insert on the list.
160  *
161  *      This function is called from
162  *              YAML on each ip-range.
163  *              As a result of lnetctl command
164  *              When building a NID or P2P selection rules
165  */
166 int lustre_lnet_add_ip_range(struct list_head *list, char *str_ip_range)
167 {
168         struct lustre_lnet_ip_range_descr *ip_range;
169         int rc;
170
171         ip_range = calloc(1, sizeof(*ip_range));
172         if (ip_range == NULL)
173                 return LUSTRE_CFG_RC_OUT_OF_MEM;
174
175         INIT_LIST_HEAD(&ip_range->ipr_entry);
176         INIT_LIST_HEAD(&ip_range->ipr_expr);
177
178         rc = cfs_ip_addr_parse(str_ip_range, strlen(str_ip_range),
179                                &ip_range->ipr_expr);
180         if (rc != 0)
181                 return LUSTRE_CFG_RC_BAD_PARAM;
182
183         list_add_tail(&ip_range->ipr_entry, list);
184
185         return LUSTRE_CFG_RC_NO_ERR;
186 }
187
188 int lustre_lnet_add_intf_descr(struct list_head *list, char *intf, int len)
189 {
190         char *open_sq_bracket = NULL, *close_sq_bracket = NULL,
191              *intf_name;
192         struct lnet_dlc_intf_descr *intf_descr = NULL;
193         int rc;
194         char intf_string[LNET_MAX_STR_LEN];
195
196         if (len >= LNET_MAX_STR_LEN)
197                 return LUSTRE_CFG_RC_BAD_PARAM;
198
199         strncpy(intf_string, intf, len);
200         intf_string[len] = '\0';
201
202         intf_descr = calloc(1, sizeof(*intf_descr));
203         if (intf_descr == NULL)
204                 return LUSTRE_CFG_RC_OUT_OF_MEM;
205
206         INIT_LIST_HEAD(&intf_descr->intf_on_network);
207
208         intf_name = intf_string;
209         open_sq_bracket = strchr(intf_string, '[');
210         if (open_sq_bracket != NULL) {
211                 close_sq_bracket = strchr(intf_string, ']');
212                 if (close_sq_bracket == NULL) {
213                         free(intf_descr);
214                         return LUSTRE_CFG_RC_BAD_PARAM;
215                 }
216                 rc = cfs_expr_list_parse(open_sq_bracket,
217                                          strlen(open_sq_bracket), 0, UINT_MAX,
218                                          &intf_descr->cpt_expr);
219                 if (rc < 0) {
220                         free(intf_descr);
221                         return LUSTRE_CFG_RC_BAD_PARAM;
222                 }
223                 strncpy(intf_descr->intf_name, intf_name,
224                         open_sq_bracket - intf_name);
225                 intf_descr->intf_name[open_sq_bracket - intf_name] = '\0';
226         } else {
227                 strcpy(intf_descr->intf_name, intf_name);
228                 intf_descr->cpt_expr = NULL;
229         }
230
231         list_add_tail(&intf_descr->intf_on_network, list);
232
233         return LUSTRE_CFG_RC_NO_ERR;
234 }
235
236 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr)
237 {
238         if (nw_descr != NULL) {
239                 nw_descr->nw_id = 0;
240                 INIT_LIST_HEAD(&nw_descr->network_on_rule);
241                 INIT_LIST_HEAD(&nw_descr->nw_intflist);
242         }
243 }
244
245 int lustre_lnet_parse_nidstr(char *nidstr, lnet_nid_t *lnet_nidlist,
246                              int max_nids, char *err_str)
247 {
248         int rc, num_nids = 0;
249         struct list_head nidlist;
250
251         if (!nidstr) {
252                 snprintf(err_str, LNET_MAX_STR_LEN, "supplied nidstr is NULL");
253                 return LUSTRE_CFG_RC_BAD_PARAM;
254         }
255
256         if (strchr(nidstr, '*')) {
257                 snprintf(err_str, LNET_MAX_STR_LEN,
258                          "asterisk not allowed in nidstring \"%s\"", nidstr);
259                 return LUSTRE_CFG_RC_BAD_PARAM;
260         }
261
262         INIT_LIST_HEAD(&nidlist);
263         rc = cfs_parse_nidlist(nidstr, strlen(nidstr), &nidlist);
264         if (rc == 0) {
265                 snprintf(err_str, LNET_MAX_STR_LEN,
266                          "Unable to parse nidlist from: %s\n", nidstr);
267                 return LUSTRE_CFG_RC_BAD_PARAM;
268         }
269
270         if (list_empty(&nidlist)) {
271                 snprintf(err_str, LNET_MAX_STR_LEN,
272                          "\"%s\" does not specify any valid nid lists", nidstr);
273                 return LUSTRE_CFG_RC_BAD_PARAM;
274         }
275
276         num_nids = cfs_expand_nidlist(&nidlist, lnet_nidlist, max_nids);
277         cfs_free_nidlist(&nidlist);
278
279         if (num_nids == -1) {
280                 snprintf(err_str, LNET_MAX_STR_LEN,
281                          "\"%s\" specifies more than the %d NIDs allowed by this operation.",
282                          nidstr, max_nids);
283                 return LUSTRE_CFG_RC_BAD_PARAM;
284         }
285
286         if (num_nids < 0) {
287                 snprintf(err_str, LNET_MAX_STR_LEN,
288                          "Failed to expand nidstr: %s", strerror(num_nids));
289                 return LUSTRE_CFG_RC_OUT_OF_MEM;
290         }
291
292         if (num_nids == 0) {
293                 snprintf(err_str, LNET_MAX_STR_LEN,
294                          "\"%s\" did not expand to any nids", nidstr);
295                 return LUSTRE_CFG_RC_BAD_PARAM;
296         }
297
298         return num_nids;
299 }
300
301 /*
302  * format expected:
303  *      <intf>[<expr>], <intf>[<expr>],..
304  */
305 int lustre_lnet_parse_interfaces(char *intf_str,
306                                  struct lnet_dlc_network_descr *nw_descr)
307 {
308         char *open_square;
309         char *close_square;
310         char *comma;
311         char *cur = intf_str, *next = NULL;
312         char *end = intf_str + strlen(intf_str);
313         int rc, len;
314         struct lnet_dlc_intf_descr *intf_descr, *tmp;
315
316         if (nw_descr == NULL)
317                 return LUSTRE_CFG_RC_BAD_PARAM;
318
319         while (cur < end) {
320                 open_square = strchr(cur, '[');
321                 if (open_square != NULL) {
322                         close_square = strchr(cur, ']');
323                         if (close_square == NULL) {
324                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
325                                 goto failed;
326                         }
327
328                         comma = strchr(cur, ',');
329                         if (comma != NULL && comma > close_square) {
330                                 next = comma + 1;
331                                 len = next - close_square;
332                         } else {
333                                 len = strlen(cur);
334                                 next = cur + len;
335                         }
336                 } else {
337                         comma = strchr(cur, ',');
338                         if (comma != NULL) {
339                                 next = comma + 1;
340                                 len = comma - cur;
341                         } else {
342                                 len = strlen(cur);
343                                 next = cur + len;
344                         }
345                 }
346
347                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist, cur, len);
348                 if (rc != LUSTRE_CFG_RC_NO_ERR)
349                         goto failed;
350
351                 cur = next;
352         }
353
354         return LUSTRE_CFG_RC_NO_ERR;
355
356 failed:
357         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
358                                  intf_on_network) {
359                 list_del(&intf_descr->intf_on_network);
360                 free_intf_descr(intf_descr);
361         }
362
363         return rc;
364 }
365
366 int lustre_lnet_config_lib_init(void)
367 {
368         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH);
369 }
370
371 void lustre_lnet_config_lib_uninit(void)
372 {
373         unregister_ioc_dev(LNET_DEV_ID);
374 }
375
376 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
377                                  int seq_no, struct cYAML **err_rc)
378 {
379         struct libcfs_ioctl_data data;
380         unsigned int opc;
381         int rc;
382         char err_str[LNET_MAX_STR_LEN] = "\"Success\"";
383
384         LIBCFS_IOC_INIT(data);
385
386         /* Reverse logic is used here in order not to change
387          * the lctl utility */
388         data.ioc_flags = load_ni_from_mod ? 0 : 1;
389
390         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
391
392         rc = l_ioctl(LNET_DEV_ID, opc, &data);
393         if (rc != 0) {
394                 snprintf(err_str,
395                         sizeof(err_str),
396                         "\"LNet %s error: %s\"", (up) ? "configure" :
397                         "unconfigure", strerror(errno));
398                 rc = -errno;
399         }
400
401         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
402                           "lnet", err_str, err_rc);
403
404         return rc;
405 }
406
407 static int dispatch_peer_ni_cmd(__u32 cmd, struct lnet_ioctl_peer_cfg *data,
408                                 char *err_str, char *cmd_str)
409 {
410         int rc;
411
412         rc = l_ioctl(LNET_DEV_ID, cmd, data);
413         if (rc) {
414                 rc = -errno;
415                 snprintf(err_str, LNET_MAX_STR_LEN,
416                          "\"%s peer ni operation failed: %s\"",
417                          cmd_str, strerror(errno));
418         }
419
420         return rc;
421 }
422
423 static int infra_ping_nid(char *ping_nids, char *oper, int param, int ioc_call,
424                           int seq_no, struct cYAML **show_rc,
425                           struct cYAML **err_rc)
426 {
427         void *data = NULL;
428         struct lnet_ioctl_ping_data ping;
429         struct cYAML *root = NULL, *ping_node = NULL, *item = NULL,
430                      *first_seq = NULL, *tmp = NULL, *peer_ni = NULL;
431         struct lnet_process_id id;
432         char err_str[LNET_MAX_STR_LEN] = {0};
433         char *sep, *token, *end;
434         char buf[6];
435         size_t len;
436         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
437         int i;
438         bool flag = false;
439
440         len = (sizeof(struct lnet_process_id) * LNET_INTERFACES_MAX_DEFAULT);
441
442         data = calloc(1, len);
443         if (data == NULL)
444                 goto out;
445
446         /* create struct cYAML root object */
447         root = cYAML_create_object(NULL, NULL);
448         if (root == NULL)
449                 goto out;
450
451         ping_node = cYAML_create_seq(root, oper);
452         if (ping_node == NULL)
453                 goto out;
454
455         /* tokenise each nid in string ping_nids */
456         token = strtok(ping_nids, ",");
457
458         do {
459                 item = cYAML_create_seq_item(ping_node);
460                 if (item == NULL)
461                         goto out;
462
463                 if (first_seq == NULL)
464                         first_seq = item;
465
466                 /* check if '-' is a part of NID, token */
467                 sep = strchr(token, '-');
468                 if (sep == NULL) {
469                         id.pid = LNET_PID_ANY;
470                         /* if no net is specified, libcfs_str2nid() will assume tcp */
471                         id.nid = libcfs_str2nid(token);
472                         if (id.nid == LNET_NID_ANY) {
473                                 snprintf(err_str, sizeof(err_str),
474                                          "\"cannot parse NID '%s'\"",
475                                          token);
476                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
477                                 cYAML_build_error(rc, seq_no, MANAGE_CMD,
478                                                   oper, err_str, err_rc);
479                                 continue;
480                         }
481                 } else {
482                         if (token[0] == 'u' || token[0] == 'U')
483                                 id.pid = (strtoul(&token[1], &end, 0) |
484                                           (LNET_PID_USERFLAG));
485                         else
486                                 id.pid = strtoul(token, &end, 0);
487
488                         /* assuming '-' is part of hostname */
489                         if (end != sep) {
490                                 id.pid = LNET_PID_ANY;
491                                 id.nid = libcfs_str2nid(token);
492                                 if (id.nid == LNET_NID_ANY) {
493                                         snprintf(err_str, sizeof(err_str),
494                                                  "\"cannot parse NID '%s'\"",
495                                                  token);
496                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
497                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
498                                                           oper, err_str,
499                                                           err_rc);
500                                         continue;
501                                 }
502                         } else {
503                                 id.nid = libcfs_str2nid(sep + 1);
504                                 if (id.nid == LNET_NID_ANY) {
505                                         snprintf(err_str, sizeof(err_str),
506                                                  "\"cannot parse NID '%s'\"",
507                                                  token);
508                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
509                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
510                                                           oper, err_str,
511                                                           err_rc);
512                                         continue;
513                                 }
514                         }
515                 }
516                 LIBCFS_IOC_INIT_V2(ping, ping_hdr);
517                 ping.ping_hdr.ioc_len = sizeof(ping);
518                 ping.ping_id          = id;
519                 ping.op_param         = param;
520                 ping.ping_count       = LNET_INTERFACES_MAX_DEFAULT;
521                 ping.ping_buf         = data;
522
523                 rc = l_ioctl(LNET_DEV_ID, ioc_call, &ping);
524                 if (rc != 0) {
525                         snprintf(err_str,
526                                  sizeof(err_str), "failed to %s %s: %s\n", oper,
527                                  id.pid == LNET_PID_ANY ?
528                                  libcfs_nid2str(id.nid) :
529                                  libcfs_id2str(id), strerror(errno));
530                         rc = LUSTRE_CFG_RC_BAD_PARAM;
531                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
532                                           oper, err_str, err_rc);
533                         continue;
534                 }
535
536                 if (cYAML_create_string(item, "primary nid",
537                                         libcfs_nid2str(ping.ping_id.nid)) == NULL)
538                         goto out;
539
540                 if (cYAML_create_string(item, "Multi-Rail", ping.mr_info ?
541                                         "True" : "False") == NULL)
542                         goto out;
543
544                 tmp = cYAML_create_seq(item, "peer ni");
545                 if (tmp == NULL)
546                         goto out;
547
548                 for (i = 0; i < ping.ping_count; i++) {
549                         if (ping.ping_buf[i].nid == LNET_NID_LO_0)
550                                 continue;
551                         peer_ni = cYAML_create_seq_item(tmp);
552                         if (peer_ni == NULL)
553                                 goto out;
554                         memset(buf, 0, sizeof buf);
555                         snprintf(buf, sizeof buf, "nid");
556                         if (cYAML_create_string(peer_ni, buf,
557                                                 libcfs_nid2str(ping.ping_buf[i].nid)) == NULL)
558                                 goto out;
559                 }
560
561                 flag = true;
562
563         } while ((token = strtok(NULL, ",")) != NULL);
564
565         if (flag)
566                 rc = LUSTRE_CFG_RC_NO_ERR;
567
568 out:
569         if (data)
570                 free(data);
571         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
572                 cYAML_free_tree(root);
573         } else if (show_rc != NULL && *show_rc != NULL) {
574                 struct cYAML *show_node;
575                 show_node = cYAML_get_object_item(*show_rc, oper);
576                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
577                         cYAML_insert_child(show_node, first_seq);
578                         free(ping_node);
579                         free(root);
580                 } else if (show_node == NULL) {
581                         cYAML_insert_sibling((*show_rc)->cy_child,
582                                              ping_node);
583                         free(root);
584                 } else {
585                         cYAML_free_tree(root);
586                 }
587         } else {
588                 *show_rc = root;
589         }
590
591         return rc;
592 }
593
594 int lustre_lnet_ping_nid(char *ping_nids, int timeout, int seq_no,
595                          struct cYAML **show_rc, struct cYAML **err_rc)
596 {
597         int rc;
598
599         rc = infra_ping_nid(ping_nids, "ping", timeout, IOC_LIBCFS_PING_PEER,
600                             seq_no, show_rc, err_rc);
601         return rc;
602 }
603
604 int lustre_lnet_discover_nid(char *ping_nids, int force, int seq_no,
605                          struct cYAML **show_rc, struct cYAML **err_rc)
606 {
607         int rc;
608
609         rc = infra_ping_nid(ping_nids, "discover", force, IOC_LIBCFS_DISCOVER,
610                             seq_no, show_rc, err_rc);
611         return rc;
612 }
613
614 static int lustre_lnet_handle_peer_nidlist(lnet_nid_t *nidlist, int num_nids,
615                                            bool is_mr, __u32 cmd,
616                                            char *cmd_type, char *err_str)
617 {
618         struct lnet_ioctl_peer_cfg data;
619         int rc, nid_idx;
620
621         if (cmd == IOC_LIBCFS_ADD_PEER_NI) {
622                 /* When adding a peer we first need to create the peer using the
623                  * specified (or implied) primary nid. Then we can add
624                  * additional nids to this peer using the primary nid as a key
625                  */
626                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
627                 data.prcfg_mr = is_mr;
628                 data.prcfg_prim_nid = nidlist[0];
629                 data.prcfg_cfg_nid = LNET_NID_ANY;
630
631                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
632
633                 if (rc)
634                         return rc;
635         }
636
637         /* Add or delete any specified NIs associated with the specified
638          * (or implied) primary nid
639          */
640         for (nid_idx = 1; nid_idx < num_nids; nid_idx++) {
641                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
642                 data.prcfg_mr = is_mr;
643                 data.prcfg_prim_nid = nidlist[0];
644                 data.prcfg_cfg_nid = nidlist[nid_idx];
645
646                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
647
648                 if (rc)
649                         return rc;
650         }
651
652         if (cmd == IOC_LIBCFS_DEL_PEER_NI && num_nids == 1) {
653                 /* In the delete case we may have been given just the
654                  * primary nid of the peer. This tells us to delete the peer
655                  * completely (rather than just delete some of its NIs)
656                  */
657                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
658                 data.prcfg_prim_nid = nidlist[0];
659                 data.prcfg_cfg_nid = LNET_NID_ANY;
660
661                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
662         }
663
664         return rc;
665 }
666
667 static int
668 lustre_lnet_mod_peer_nidlist(lnet_nid_t pnid, lnet_nid_t *lnet_nidlist,
669                              int cmd, int num_nids, bool is_mr, int seq_no,
670                              struct cYAML **err_rc)
671 {
672         int rc = LUSTRE_CFG_RC_NO_ERR;
673         char err_str[LNET_MAX_STR_LEN];
674         lnet_nid_t *lnet_nidlist2 = NULL;
675         int ioc_cmd = (cmd == LNETCTL_ADD_CMD) ? IOC_LIBCFS_ADD_PEER_NI :
676                 IOC_LIBCFS_DEL_PEER_NI;
677         char *cmd_str = (cmd == LNETCTL_ADD_CMD) ? ADD_CMD : DEL_CMD;
678
679         num_nids++;
680         lnet_nidlist2 = calloc(sizeof(*lnet_nidlist2), num_nids);
681         if (!lnet_nidlist2) {
682                 snprintf(err_str, LNET_MAX_STR_LEN, "out of memory");
683                 rc = LUSTRE_CFG_RC_OUT_OF_MEM;
684                 goto out;
685         }
686         lnet_nidlist2[0] = pnid;
687         memcpy(&lnet_nidlist2[1], lnet_nidlist, sizeof(*lnet_nidlist) *
688                                                 (num_nids - 1));
689
690         rc = lustre_lnet_handle_peer_nidlist(lnet_nidlist2,
691                                              num_nids, is_mr, ioc_cmd,
692                                              cmd_str, err_str);
693 out:
694         if (lnet_nidlist2)
695                 free(lnet_nidlist2);
696
697         cYAML_build_error(rc, seq_no, cmd_str, "peer_ni", err_str, err_rc);
698         return rc;
699 }
700
701 static void
702 replace_sep(char *str, char sep, char newsep)
703 {
704         int bracket = 0;
705         int i;
706         if (!str)
707                 return;
708         for (i = 0; i < strlen(str); i++) {
709                 /* don't replace ',' within [] */
710                 if (str[i] == '[')
711                         bracket++;
712                 else if (str[i] == ']')
713                         bracket--;
714                 else if (str[i] == sep && bracket == 0)
715                         str[i] = newsep;
716         }
717 }
718
719 int lustre_lnet_modify_peer(char *prim_nid, char *nids, bool is_mr,
720                             int cmd, int seq_no, struct cYAML **err_rc)
721 {
722         int num_nids, rc;
723         char err_str[LNET_MAX_STR_LEN] = "Error";
724         lnet_nid_t lnet_nidlist[LNET_MAX_NIDS_PER_PEER];
725         lnet_nid_t pnid = LNET_NID_ANY;
726
727         if (!prim_nid) {
728                 rc = LUSTRE_CFG_RC_BAD_PARAM;
729                 snprintf(err_str, LNET_MAX_STR_LEN,
730                          "--prim_nid must be specified");
731                 goto out;
732         }
733
734         pnid = libcfs_str2nid(prim_nid);
735         if (pnid == LNET_NID_ANY) {
736                 rc = LUSTRE_CFG_RC_BAD_PARAM;
737                 snprintf(err_str, LNET_MAX_STR_LEN,
738                         "badly formatted primary NID: %s", prim_nid);
739                 goto out;
740         }
741
742         num_nids = 0;
743         if (nids) {
744                 /*
745                 * if there is no primary nid we need to make the first nid in the
746                 * nids list the primary nid
747                 */
748                 replace_sep(nids, ',', ' ');
749                 rc = lustre_lnet_parse_nidstr(nids, lnet_nidlist,
750                                         LNET_MAX_NIDS_PER_PEER, err_str);
751                 if (rc < 0)
752                         goto out;
753
754                 num_nids = rc;
755         }
756
757         rc = lustre_lnet_mod_peer_nidlist(pnid, lnet_nidlist,
758                                           cmd, num_nids, is_mr,
759                                           -1, err_rc);
760
761 out:
762         if (rc != LUSTRE_CFG_RC_NO_ERR)
763                 cYAML_build_error(rc, -1, "peer",
764                                 cmd == LNETCTL_ADD_CMD ? "add" : "del",
765                                 err_str, err_rc);
766
767         return rc;
768 }
769
770 int lustre_lnet_route_common(char *nw, char *nidstr, int hops, int prio,
771                              int sen, int seq_no, struct cYAML **err_rc,
772                              int cmd)
773 {
774         int rc, num_nids, idx;
775         __u32 rnet;
776         char err_str[LNET_MAX_STR_LEN] = "\"generic error\"";
777         struct lnet_ioctl_config_data data;
778         lnet_nid_t lnet_nidlist[LNET_MAX_NIDS_PER_PEER];
779
780         if (nw == NULL || nidstr == NULL) {
781                 snprintf(err_str, LNET_MAX_STR_LEN,
782                          "\"missing mandatory parameter:'%s'\"",
783                          (nw == NULL && nidstr == NULL) ? "network, gateway" :
784                          (nw == NULL) ? "network" : "gateway");
785                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
786                 goto out;
787         }
788
789         rnet = libcfs_str2net(nw);
790         if (rnet == LNET_NET_ANY) {
791                 snprintf(err_str, LNET_MAX_STR_LEN,
792                          "\"cannot parse remote net %s\"", nw);
793                 rc = LUSTRE_CFG_RC_BAD_PARAM;
794                 goto out;
795         }
796
797         replace_sep(nidstr, ',', ' ');
798         rc = lustre_lnet_parse_nidstr(nidstr, lnet_nidlist,
799                                       LNET_MAX_NIDS_PER_PEER, err_str);
800         if (rc < 0)
801                 goto out;
802
803         num_nids = rc;
804
805         for (idx = 0; idx < num_nids; idx++) {
806                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
807                 data.cfg_net = rnet;
808                 if (cmd == LNETCTL_ADD_CMD) {
809                         data.cfg_config_u.cfg_route.rtr_hop = hops;
810                         data.cfg_config_u.cfg_route.rtr_priority = prio;
811                         data.cfg_config_u.cfg_route.rtr_sensitivity = sen;
812                 }
813
814                 data.cfg_nid = lnet_nidlist[idx];
815
816                 if (cmd == LNETCTL_ADD_CMD)
817                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE,
818                                         &data);
819                 else
820                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE,
821                                         &data);
822
823                 if (rc != 0 && errno != EEXIST &&
824                         errno != EHOSTUNREACH) {
825                         rc = -errno;
826                         snprintf(err_str, LNET_MAX_STR_LEN,
827                                         "route operation failed: %s",
828                                         strerror(errno));
829                         goto out;
830                 } else if (errno == EEXIST) {
831                         /*
832                          * continue chugging along if one of the
833                          * routes already exists
834                          */
835                         rc = 0;
836                 }
837         }
838
839 out:
840         cYAML_build_error(rc, seq_no,
841                           cmd == LNETCTL_ADD_CMD ? ADD_CMD : DEL_CMD, "route",
842                           err_str, err_rc);
843
844         return rc;
845 }
846
847 int lustre_lnet_config_route(char *nw, char *nidstr, int hops, int prio,
848                              int sen, int seq_no, struct cYAML **err_rc)
849 {
850         int rc;
851         char err_str[LNET_MAX_STR_LEN] = "\"generic error\"";
852
853         if (hops == -1) {
854                 hops = LNET_UNDEFINED_HOPS;
855         } else if (hops < 1 || hops > 255) {
856                 snprintf(err_str, LNET_MAX_STR_LEN,
857                          "\"invalid hop count %d, must be between 1 and 255\"",
858                          hops);
859                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
860                 goto out;
861         }
862
863         if (prio == -1) {
864                 prio = 0;
865         } else if (prio < 0) {
866                 snprintf(err_str, LNET_MAX_STR_LEN,
867                          "\"invalid priority %d, must be greater than 0\"",
868                          prio);
869                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
870                 goto out;
871         }
872
873         if (sen == -1) {
874                 sen = 1;
875         } else if (sen < 1) {
876                 snprintf(err_str, LNET_MAX_STR_LEN,
877                          "\"invalid health sensitivity %d, must be 1 or greater\"",
878                          sen);
879                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
880                 goto out;
881         }
882
883         rc = lustre_lnet_route_common(nw, nidstr, hops, prio, sen, seq_no,
884                                       err_rc, LNETCTL_ADD_CMD);
885         return rc;
886 out:
887         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
888
889         return rc;
890 }
891
892 int lustre_lnet_del_route(char *nw, char *nidstr, int seq_no,
893                           struct cYAML **err_rc)
894 {
895         return lustre_lnet_route_common(nw, nidstr, 0, 0, 0, seq_no, err_rc,
896                                         LNETCTL_DEL_CMD);
897 }
898
899 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
900                            int seq_no, struct cYAML **show_rc,
901                            struct cYAML **err_rc, bool backup)
902 {
903         struct lnet_ioctl_config_data data;
904         lnet_nid_t gateway_nid;
905         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
906         int l_errno = 0;
907         __u32 net = LNET_NET_ANY;
908         int i;
909         struct cYAML *root = NULL, *route = NULL, *item = NULL;
910         struct cYAML *first_seq = NULL;
911         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
912         bool exist = false;
913
914         if (nw != NULL) {
915                 net = libcfs_str2net(nw);
916                 if (net == LNET_NET_ANY) {
917                         snprintf(err_str,
918                                  sizeof(err_str),
919                                  "\"cannot parse net '%s'\"", nw);
920                         rc = LUSTRE_CFG_RC_BAD_PARAM;
921                         goto out;
922                 }
923
924         } else {
925                 /* show all routes without filtering on net */
926                 net = LNET_NET_ANY;
927         }
928
929         if (gw != NULL) {
930                 gateway_nid = libcfs_str2nid(gw);
931                 if (gateway_nid == LNET_NID_ANY) {
932                         snprintf(err_str,
933                                  sizeof(err_str),
934                                  "\"cannot parse gateway NID '%s'\"", gw);
935                         rc = LUSTRE_CFG_RC_BAD_PARAM;
936                         goto out;
937                 }
938         } else
939                 /* show all routes with out filtering on gateway */
940                 gateway_nid = LNET_NID_ANY;
941
942         if ((hops < 1 && hops != -1) || hops > 255) {
943                 snprintf(err_str,
944                          sizeof(err_str),
945                          "\"invalid hop count %d, must be between 0 and 256\"",
946                          hops);
947                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
948                 goto out;
949         }
950
951         /* create struct cYAML root object */
952         root = cYAML_create_object(NULL, NULL);
953         if (root == NULL)
954                 goto out;
955
956         route = cYAML_create_seq(root, "route");
957         if (route == NULL)
958                 goto out;
959
960         for (i = 0;; i++) {
961                 __u32 rt_alive;
962                 __u32 rt_multi_hop;
963
964                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
965                 data.cfg_count = i;
966
967                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
968                 if (rc != 0) {
969                         l_errno = errno;
970                         break;
971                 }
972
973                 /* filter on provided data */
974                 if (net != LNET_NET_ANY &&
975                     net != data.cfg_net)
976                         continue;
977
978                 if (gateway_nid != LNET_NID_ANY &&
979                     gateway_nid != data.cfg_nid)
980                         continue;
981
982                 if (hops != -1 &&
983                     hops != data.cfg_config_u.cfg_route.rtr_hop)
984                         continue;
985
986                 if (prio != -1 &&
987                     prio != data.cfg_config_u.cfg_route.rtr_priority)
988                         continue;
989
990                 /* default rc to -1 incase we hit the goto */
991                 rc = -1;
992                 exist = true;
993
994                 item = cYAML_create_seq_item(route);
995                 if (item == NULL)
996                         goto out;
997
998                 if (first_seq == NULL)
999                         first_seq = item;
1000
1001                 if (cYAML_create_string(item, "net",
1002                                         libcfs_net2str(data.cfg_net)) == NULL)
1003                         goto out;
1004
1005                 if (cYAML_create_string(item, "gateway",
1006                                         libcfs_nid2str(data.cfg_nid)) == NULL)
1007                         goto out;
1008
1009                 if (detail) {
1010                         if (cYAML_create_number(item, "hop",
1011                                                 (int) data.cfg_config_u.
1012                                                 cfg_route.rtr_hop) ==
1013                             NULL)
1014                                 goto out;
1015
1016                         if (cYAML_create_number(item, "priority",
1017                                                 data.cfg_config_u.
1018                                                 cfg_route.rtr_priority) == NULL)
1019                                 goto out;
1020
1021                         if (cYAML_create_number(item, "health_sensitivity",
1022                                                 data.cfg_config_u.
1023                                                 cfg_route.rtr_sensitivity) == NULL)
1024                                 goto out;
1025
1026                         rt_alive = data.cfg_config_u.cfg_route.rtr_flags &
1027                                         LNET_RT_ALIVE;
1028                         rt_multi_hop = data.cfg_config_u.cfg_route.rtr_flags &
1029                                         LNET_RT_MULTI_HOP;
1030
1031                         if (!backup &&
1032                             cYAML_create_string(item, "state",
1033                                                 rt_alive ?
1034                                                 "up" : "down") == NULL)
1035                                 goto out;
1036
1037                         if (!backup &&
1038                             cYAML_create_string(item, "type",
1039                                                 rt_multi_hop?
1040                                                 "multi-hop" : "single-hop") == NULL)
1041                                 goto out;
1042                 }
1043         }
1044
1045         /* print output iff show_rc is not provided */
1046         if (show_rc == NULL)
1047                 cYAML_print_tree(root);
1048
1049         if (l_errno != ENOENT) {
1050                 snprintf(err_str,
1051                          sizeof(err_str),
1052                          "\"cannot get routes: %s\"",
1053                          strerror(l_errno));
1054                 rc = -l_errno;
1055                 goto out;
1056         } else
1057                 rc = LUSTRE_CFG_RC_NO_ERR;
1058
1059         snprintf(err_str, sizeof(err_str), "\"success\"");
1060 out:
1061         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
1062                 cYAML_free_tree(root);
1063         } else if (show_rc != NULL && *show_rc != NULL) {
1064                 struct cYAML *show_node;
1065                 /* find the route node, if one doesn't exist then
1066                  * insert one.  Otherwise add to the one there
1067                  */
1068                 show_node = cYAML_get_object_item(*show_rc, "route");
1069                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1070                         cYAML_insert_child(show_node, first_seq);
1071                         free(route);
1072                         free(root);
1073                 } else if (show_node == NULL) {
1074                         cYAML_insert_sibling((*show_rc)->cy_child,
1075                                                 route);
1076                         free(root);
1077                 } else {
1078                         cYAML_free_tree(root);
1079                 }
1080         } else {
1081                 *show_rc = root;
1082         }
1083
1084         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
1085
1086         return rc;
1087 }
1088
1089 static int socket_intf_query(int request, char *intf,
1090                              struct ifreq *ifr)
1091 {
1092         int rc = 0;
1093         int sockfd;
1094
1095         if (strlen(intf) >= IFNAMSIZ || ifr == NULL)
1096                 return LUSTRE_CFG_RC_BAD_PARAM;
1097
1098         sockfd = socket(AF_INET, SOCK_DGRAM, 0);
1099         if (sockfd < 0)
1100                 return LUSTRE_CFG_RC_BAD_PARAM;
1101
1102         strcpy(ifr->ifr_name, intf);
1103         rc = ioctl(sockfd, request, ifr);
1104         if (rc != 0)
1105                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1106
1107         close(sockfd);
1108
1109         return rc;
1110 }
1111
1112 static int lustre_lnet_queryip(struct lnet_dlc_intf_descr *intf, __u32 *ip)
1113 {
1114         struct ifreq ifr;
1115         int rc;
1116
1117         memset(&ifr, 0, sizeof(ifr));
1118         rc = socket_intf_query(SIOCGIFFLAGS, intf->intf_name, &ifr);
1119         if (rc != 0)
1120                 return LUSTRE_CFG_RC_BAD_PARAM;
1121
1122         if ((ifr.ifr_flags & IFF_UP) == 0)
1123                 return LUSTRE_CFG_RC_BAD_PARAM;
1124
1125         memset(&ifr, 0, sizeof(ifr));
1126         rc = socket_intf_query(SIOCGIFADDR, intf->intf_name, &ifr);
1127         if (rc != 0)
1128                 return LUSTRE_CFG_RC_BAD_PARAM;
1129
1130         *ip = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
1131         *ip = bswap_32(*ip);
1132
1133         return LUSTRE_CFG_RC_NO_ERR;
1134 }
1135
1136 /*
1137  * for each interface in the array of interfaces find the IP address of
1138  * that interface, create its nid and add it to an array of NIDs.
1139  * Stop if any of the interfaces is down
1140  */
1141 static int lustre_lnet_intf2nids(struct lnet_dlc_network_descr *nw,
1142                                  lnet_nid_t **nids, __u32 *nnids,
1143                                  char *err_str, size_t str_len)
1144 {
1145         int i = 0, count = 0, rc;
1146         struct lnet_dlc_intf_descr *intf;
1147         char val[LNET_MAX_STR_LEN];
1148         __u32 ip;
1149         int gni_num;
1150         char *endp;
1151         unsigned int num;
1152
1153
1154         if (nw == NULL || nids == NULL) {
1155                 snprintf(err_str, str_len,
1156                          "\"unexpected parameters to lustre_lnet_intf2nids()\"");
1157                 return LUSTRE_CFG_RC_BAD_PARAM;
1158         }
1159
1160         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1161                 count = 1;
1162         } else {
1163                 list_for_each_entry(intf, &nw->nw_intflist, intf_on_network)
1164                         count++;
1165         }
1166
1167         *nids = calloc(count, sizeof(lnet_nid_t));
1168         if (*nids == NULL) {
1169                 snprintf(err_str, str_len,
1170                          "\"out of memory\"");
1171                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1172         }
1173         /*
1174          * special case the GNI interface since it doesn't have an IP
1175          * address. The assumption is that there can only be one GNI
1176          * interface in the system. No interface name is provided.
1177          */
1178         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1179                 rc = read_sysfs_file(gni_nid_path, "nid", val,
1180                                 1, sizeof(val));
1181                 if (rc) {
1182                         snprintf(err_str, str_len,
1183                                  "\"cannot read gni nid\"");
1184                         goto failed;
1185                 }
1186                 gni_num = atoi(val);
1187
1188                 (*nids)[i] = LNET_MKNID(nw->nw_id, gni_num);
1189
1190                 goto out;
1191         }
1192
1193         /* look at the other interfaces */
1194         list_for_each_entry(intf, &nw->nw_intflist, intf_on_network) {
1195                 if (LNET_NETTYP(nw->nw_id) == PTL4LND) {
1196                         /* handle LNDs with numeric interface name */
1197                         num = strtoul(intf->intf_name, &endp, 0);
1198                         if (endp == intf->intf_name || *endp != '\0') {
1199                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1200                                 snprintf(err_str, str_len,
1201                                          "\"couldn't query intf %s\"",
1202                                          intf->intf_name);
1203                                 goto failed;
1204                         }
1205                         (*nids)[i] = LNET_MKNID(nw->nw_id, num);
1206                         i++;
1207                 } else {
1208                         /* handle LNDs with ip interface name */
1209                         rc = lustre_lnet_queryip(intf, &ip);
1210                         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1211                                 snprintf(err_str, str_len,
1212                                          "\"couldn't query intf %s\"",
1213                                          intf->intf_name);
1214                                 goto failed;
1215                         }
1216                         (*nids)[i] = LNET_MKNID(nw->nw_id, ip);
1217                         i++;
1218                 }
1219         }
1220
1221 out:
1222         *nnids = count;
1223
1224         return 0;
1225
1226 failed:
1227         free(*nids);
1228         *nids = NULL;
1229         return rc;
1230 }
1231
1232 /*
1233  * called repeatedly until a match or no more ip range
1234  * What do you have?
1235  *      ip_range expression
1236  *      interface list with all the interface names.
1237  *      all the interfaces in the system.
1238  *
1239  *      try to match the ip_range expr to one of the interfaces' IPs in
1240  *      the system. If we hit a patch for an interface. Check if that
1241  *      interface name is in the list.
1242  *
1243  *      If there are more than one interface in the list, then make sure
1244  *      that the IPs for all of these interfaces match the ip ranges
1245  *      given.
1246  *
1247  *      for each interface in intf_list
1248  *              look up the intf name in ifa
1249  *              if not there then no match
1250  *              check ip obtained from ifa against a match to any of the
1251  *              ip_ranges given.
1252  *              If no match, then fail
1253  *
1254  *      The result is that all the interfaces have to match.
1255  */
1256 int lustre_lnet_match_ip_to_intf(struct ifaddrs *ifa,
1257                                  struct list_head *intf_list,
1258                                  struct list_head *ip_ranges)
1259 {
1260         int rc;
1261         __u32 ip;
1262         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1263         struct ifaddrs *ifaddr = ifa;
1264         struct lustre_lnet_ip_range_descr *ip_range;
1265         int family;
1266
1267         /*
1268          * if there are no explicit interfaces, and no ip ranges, then
1269          * configure the first tcp interface we encounter.
1270          */
1271         if (list_empty(intf_list) && list_empty(ip_ranges)) {
1272                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1273                         if (ifaddr->ifa_addr == NULL)
1274                                 continue;
1275
1276                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1277                                 continue;
1278
1279                         family = ifaddr->ifa_addr->sa_family;
1280                         if (family == AF_INET &&
1281                             strcmp(ifaddr->ifa_name, "lo") != 0) {
1282                                 rc = lustre_lnet_add_intf_descr
1283                                         (intf_list, ifaddr->ifa_name,
1284                                         strlen(ifaddr->ifa_name));
1285
1286                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
1287                                         return rc;
1288
1289                                 return LUSTRE_CFG_RC_MATCH;
1290                         }
1291                 }
1292                 return LUSTRE_CFG_RC_NO_MATCH;
1293         }
1294
1295         /*
1296          * First interface which matches an IP pattern will be used
1297          */
1298         if (list_empty(intf_list)) {
1299                 /*
1300                  * no interfaces provided in the rule, but an ip range is
1301                  * provided, so try and match an interface to the ip
1302                  * range.
1303                  */
1304                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1305                         if (ifaddr->ifa_addr == NULL)
1306                                 continue;
1307
1308                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1309                                 continue;
1310
1311                         family = ifaddr->ifa_addr->sa_family;
1312                         if (family == AF_INET) {
1313                                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->
1314                                         sin_addr.s_addr;
1315
1316                                 list_for_each_entry(ip_range, ip_ranges,
1317                                                     ipr_entry) {
1318                                         rc = cfs_ip_addr_match(bswap_32(ip),
1319                                                         &ip_range->ipr_expr);
1320                                         if (!rc)
1321                                                 continue;
1322
1323                                         rc = lustre_lnet_add_intf_descr
1324                                           (intf_list, ifaddr->ifa_name,
1325                                            strlen(ifaddr->ifa_name));
1326
1327                                         if (rc != LUSTRE_CFG_RC_NO_ERR)
1328                                                 return rc;
1329                                 }
1330                         }
1331                 }
1332
1333                 if (!list_empty(intf_list))
1334                         return LUSTRE_CFG_RC_MATCH;
1335
1336                 return LUSTRE_CFG_RC_NO_MATCH;
1337         }
1338
1339         /*
1340          * If an interface is explicitly specified the ip-range might or
1341          * might not be specified. if specified the interface needs to match the
1342          * ip-range. If no ip-range then the interfaces are
1343          * automatically matched if they are all up.
1344          * If > 1 interfaces all the interfaces must match for the NI to
1345          * be configured.
1346          */
1347         list_for_each_entry_safe(intf_descr, tmp, intf_list, intf_on_network) {
1348                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1349                         if (ifaddr->ifa_addr == NULL)
1350                                 continue;
1351
1352                         family = ifaddr->ifa_addr->sa_family;
1353                         if (family == AF_INET &&
1354                             strcmp(intf_descr->intf_name,
1355                                    ifaddr->ifa_name) == 0)
1356                                 break;
1357                 }
1358
1359                 if (ifaddr == NULL) {
1360                         list_del(&intf_descr->intf_on_network);
1361                         free_intf_descr(intf_descr);
1362                         continue;
1363                 }
1364
1365                 if ((ifaddr->ifa_flags & IFF_UP) == 0) {
1366                         list_del(&intf_descr->intf_on_network);
1367                         free_intf_descr(intf_descr);
1368                         continue;
1369                 }
1370
1371                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->sin_addr.s_addr;
1372
1373                 rc = 1;
1374                 list_for_each_entry(ip_range, ip_ranges, ipr_entry) {
1375                         rc = cfs_ip_addr_match(bswap_32(ip), &ip_range->ipr_expr);
1376                         if (rc)
1377                                 break;
1378                 }
1379
1380                 if (!rc) {
1381                         /* no match for this interface */
1382                         list_del(&intf_descr->intf_on_network);
1383                         free_intf_descr(intf_descr);
1384                 }
1385         }
1386
1387         return LUSTRE_CFG_RC_MATCH;
1388 }
1389
1390 static int lustre_lnet_resolve_ip2nets_rule(struct lustre_lnet_ip2nets *ip2nets,
1391                                             lnet_nid_t **nids, __u32 *nnids,
1392                                             char *err_str, size_t str_len)
1393 {
1394         struct ifaddrs *ifa;
1395         int rc = LUSTRE_CFG_RC_NO_ERR;
1396
1397         rc = getifaddrs(&ifa);
1398         if (rc < 0) {
1399                 snprintf(err_str, str_len,
1400                          "\"failed to get interface addresses: %d\"", -errno);
1401                 return -errno;
1402         }
1403
1404         rc = lustre_lnet_match_ip_to_intf(ifa,
1405                                           &ip2nets->ip2nets_net.nw_intflist,
1406                                           &ip2nets->ip2nets_ip_ranges);
1407         if (rc != LUSTRE_CFG_RC_MATCH) {
1408                 snprintf(err_str, str_len,
1409                          "\"couldn't match ip to existing interfaces\"");
1410                 freeifaddrs(ifa);
1411                 return rc;
1412         }
1413
1414         rc = lustre_lnet_intf2nids(&ip2nets->ip2nets_net, nids, nnids,
1415                                    err_str, str_len);
1416         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1417                 *nids = NULL;
1418                 *nnids = 0;
1419         }
1420
1421         freeifaddrs(ifa);
1422
1423         return rc;
1424 }
1425
1426 static int
1427 lustre_lnet_ioctl_config_ni(struct list_head *intf_list,
1428                             struct lnet_ioctl_config_lnd_tunables *tunables,
1429                             struct cfs_expr_list *global_cpts,
1430                             lnet_nid_t *nids, char *err_str)
1431 {
1432         char *data;
1433         struct lnet_ioctl_config_ni *conf;
1434         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1435         int rc = LUSTRE_CFG_RC_NO_ERR, i = 0;
1436         size_t len;
1437         int count;
1438         struct lnet_dlc_intf_descr *intf_descr;
1439         __u32 *cpt_array;
1440         struct cfs_expr_list *cpt_expr;
1441
1442         list_for_each_entry(intf_descr, intf_list,
1443                             intf_on_network) {
1444                 if (tunables != NULL)
1445                         len = sizeof(struct lnet_ioctl_config_ni) +
1446                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1447                 else
1448                         len = sizeof(struct lnet_ioctl_config_ni);
1449
1450                 data = calloc(1, len);
1451                 if (!data)
1452                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1453                 conf = (struct lnet_ioctl_config_ni*) data;
1454                 if (tunables != NULL)
1455                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1456                                 conf->lic_bulk;
1457
1458                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1459                 conf->lic_cfg_hdr.ioc_len = len;
1460                 conf->lic_nid = nids[i];
1461                 strncpy(conf->lic_ni_intf[0], intf_descr->intf_name,
1462                         LNET_MAX_STR_LEN);
1463
1464                 if (intf_descr->cpt_expr != NULL)
1465                         cpt_expr = intf_descr->cpt_expr;
1466                 else if (global_cpts != NULL)
1467                         cpt_expr = global_cpts;
1468                 else
1469                         cpt_expr = NULL;
1470
1471                 if (cpt_expr != NULL) {
1472                         count = cfs_expr_list_values(cpt_expr,
1473                                                      LNET_MAX_SHOW_NUM_CPT,
1474                                                      &cpt_array);
1475                         if (count > 0) {
1476                                 memcpy(conf->lic_cpts, cpt_array,
1477                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1478                                 free(cpt_array);
1479                         } else {
1480                                 count = 0;
1481                         }
1482                 } else {
1483                         count = 0;
1484                 }
1485
1486                 conf->lic_ncpts = count;
1487
1488                 if (tunables != NULL)
1489                         memcpy(tun, tunables, sizeof(*tunables));
1490
1491                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1492                 if (rc < 0) {
1493                         rc = -errno;
1494                         snprintf(err_str,
1495                                  LNET_MAX_STR_LEN,
1496                                  "\"cannot add network: %s\"", strerror(errno));
1497                         free(data);
1498                         return rc;
1499                 }
1500                 free(data);
1501                 i++;
1502         }
1503
1504         return LUSTRE_CFG_RC_NO_ERR;
1505 }
1506
1507 int
1508 lustre_lnet_config_ip2nets(struct lustre_lnet_ip2nets *ip2nets,
1509                            struct lnet_ioctl_config_lnd_tunables *tunables,
1510                            struct cfs_expr_list *global_cpts,
1511                            int seq_no, struct cYAML **err_rc)
1512 {
1513         lnet_nid_t *nids = NULL;
1514         __u32 nnids = 0;
1515         int rc;
1516         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1517
1518         if (!ip2nets) {
1519                 snprintf(err_str,
1520                          sizeof(err_str),
1521                          "\"incomplete ip2nets information\"");
1522                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1523                 goto out;
1524         }
1525
1526         /*
1527          * call below function to resolve the rules into a list of nids.
1528          * The memory is allocated in that function then freed here when
1529          * it's no longer needed.
1530          */
1531         rc = lustre_lnet_resolve_ip2nets_rule(ip2nets, &nids, &nnids, err_str,
1532                                               sizeof(err_str));
1533         if (rc != LUSTRE_CFG_RC_NO_ERR && rc != LUSTRE_CFG_RC_MATCH)
1534                 goto out;
1535
1536         if (list_empty(&ip2nets->ip2nets_net.nw_intflist)) {
1537                 snprintf(err_str, sizeof(err_str),
1538                          "\"no interfaces match ip2nets rules\"");
1539                 goto free_nids_out;
1540         }
1541
1542         rc = lustre_lnet_ioctl_config_ni(&ip2nets->ip2nets_net.nw_intflist,
1543                                          tunables, global_cpts, nids,
1544                                          err_str);
1545
1546 free_nids_out:
1547         free(nids);
1548
1549 out:
1550         cYAML_build_error(rc, seq_no, ADD_CMD, "ip2nets", err_str, err_rc);
1551         return rc;
1552 }
1553
1554 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
1555                           struct cfs_expr_list *global_cpts,
1556                           char *ip2net,
1557                           struct lnet_ioctl_config_lnd_tunables *tunables,
1558                           int seq_no, struct cYAML **err_rc)
1559 {
1560         char *data = NULL;
1561         struct lnet_ioctl_config_ni *conf;
1562         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1563         char buf[LNET_MAX_STR_LEN];
1564         int rc = LUSTRE_CFG_RC_NO_ERR;
1565         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1566         lnet_nid_t *nids = NULL;
1567         __u32 nnids = 0;
1568         size_t len;
1569         int count;
1570         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1571         __u32 *cpt_array;
1572
1573         if (ip2net == NULL && (nw_descr == NULL || nw_descr->nw_id == 0 ||
1574             (list_empty(&nw_descr->nw_intflist) &&
1575              LNET_NETTYP(nw_descr->nw_id) != GNILND))) {
1576                 snprintf(err_str,
1577                          sizeof(err_str),
1578                          "\"missing mandatory parameters in NI config: '%s'\"",
1579                          (nw_descr == NULL) ? "network , interface" :
1580                          (nw_descr->nw_id == 0) ? "network" : "interface");
1581                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1582                 goto out;
1583         }
1584
1585         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
1586                 snprintf(err_str,
1587                          sizeof(err_str),
1588                          "\"ip2net string too long %d\"",
1589                                 (int)strlen(ip2net));
1590                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1591                 goto out;
1592         }
1593
1594         if (ip2net != NULL) {
1595                 if (tunables != NULL)
1596                         len = sizeof(struct lnet_ioctl_config_ni) +
1597                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1598                 else
1599                         len = sizeof(struct lnet_ioctl_config_ni);
1600                 data = calloc(1, len);
1601                 if (!data) {
1602                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1603                         goto out;
1604                 }
1605                 conf = (struct lnet_ioctl_config_ni*) data;
1606                 if (tunables != NULL)
1607                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1608                                 (data + sizeof(*conf));
1609
1610                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1611                 conf->lic_cfg_hdr.ioc_len = len;
1612                 strncpy(conf->lic_legacy_ip2nets, ip2net,
1613                         LNET_MAX_STR_LEN);
1614
1615                 if (global_cpts != NULL) {
1616                         count = cfs_expr_list_values(global_cpts,
1617                                                      LNET_MAX_SHOW_NUM_CPT,
1618                                                      &cpt_array);
1619                         if (count > 0) {
1620                                 memcpy(conf->lic_cpts, cpt_array,
1621                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1622                                 free(cpt_array);
1623                         } else {
1624                                 count = 0;
1625                         }
1626                 } else {
1627                         count = 0;
1628                 }
1629
1630                 conf->lic_ncpts = count;
1631
1632                 if (tunables != NULL)
1633                         memcpy(tun, tunables, sizeof(*tunables));
1634
1635                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1636                 if (rc < 0) {
1637                         rc = -errno;
1638                         snprintf(err_str,
1639                                 sizeof(err_str),
1640                                 "\"cannot add network: %s\"", strerror(errno));
1641                         goto out;
1642                 }
1643
1644                 goto out;
1645         }
1646
1647         if (LNET_NETTYP(nw_descr->nw_id) == LOLND) {
1648                 rc = LUSTRE_CFG_RC_NO_ERR;
1649                 goto out;
1650         }
1651
1652         if (nw_descr->nw_id == LNET_NET_ANY) {
1653                 snprintf(err_str,
1654                         sizeof(err_str),
1655                         "\"cannot parse net '%s'\"",
1656                         libcfs_net2str(nw_descr->nw_id));
1657                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1658                 goto out;
1659         }
1660
1661         /*
1662          * special case the GNI since no interface name is expected
1663          */
1664         if (list_empty(&nw_descr->nw_intflist) &&
1665             (LNET_NETTYP(nw_descr->nw_id) != GNILND)) {
1666                 snprintf(err_str,
1667                         sizeof(err_str),
1668                         "\"no interface name provided\"");
1669                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1670                 goto out;
1671         }
1672
1673         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1674                                    err_str, sizeof(err_str));
1675         if (rc != 0) {
1676                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1677                 goto out;
1678         }
1679
1680         rc = lustre_lnet_ioctl_config_ni(&nw_descr->nw_intflist,
1681                                          tunables, global_cpts, nids,
1682                                          err_str);
1683
1684 out:
1685         if (nw_descr != NULL) {
1686                 list_for_each_entry_safe(intf_descr, tmp,
1687                                          &nw_descr->nw_intflist,
1688                                          intf_on_network) {
1689                         list_del(&intf_descr->intf_on_network);
1690                         free_intf_descr(intf_descr);
1691                 }
1692         }
1693
1694         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
1695
1696         if (nids)
1697                 free(nids);
1698
1699         if (data)
1700                 free(data);
1701
1702         return rc;
1703 }
1704
1705 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw_descr,
1706                        int seq_no, struct cYAML **err_rc)
1707 {
1708         struct lnet_ioctl_config_ni data;
1709         int rc = LUSTRE_CFG_RC_NO_ERR, i;
1710         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1711         lnet_nid_t *nids = NULL;
1712         __u32 nnids = 0;
1713         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1714
1715         if (nw_descr == NULL || nw_descr->nw_id == 0) {
1716                 snprintf(err_str,
1717                          sizeof(err_str),
1718                          "\"missing mandatory parameter in deleting NI: '%s'\"",
1719                          (nw_descr == NULL) ? "network , interface" :
1720                          (nw_descr->nw_id == 0) ? "network" : "interface");
1721                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1722                 goto out;
1723         }
1724
1725         if (LNET_NETTYP(nw_descr->nw_id) == LOLND)
1726                 return LUSTRE_CFG_RC_NO_ERR;
1727
1728         if (nw_descr->nw_id == LNET_NET_ANY) {
1729                 snprintf(err_str,
1730                          sizeof(err_str),
1731                          "\"cannot parse net '%s'\"",
1732                          libcfs_net2str(nw_descr->nw_id));
1733                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1734                 goto out;
1735         }
1736
1737         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1738                                    err_str, sizeof(err_str));
1739         if (rc != 0) {
1740                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1741                 goto out;
1742         }
1743
1744         /*
1745          * no interfaces just the nw_id is specified
1746          */
1747         if (nnids == 0) {
1748                 nids = calloc(1, sizeof(*nids));
1749                 if (nids == NULL) {
1750                         snprintf(err_str, sizeof(err_str),
1751                                 "\"out of memory\"");
1752                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1753                         goto out;
1754                 }
1755                 nids[0] = LNET_MKNID(nw_descr->nw_id, 0);
1756                 nnids = 1;
1757         }
1758
1759         for (i = 0; i < nnids; i++) {
1760                 LIBCFS_IOC_INIT_V2(data, lic_cfg_hdr);
1761                 data.lic_nid = nids[i];
1762
1763                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_LOCAL_NI, &data);
1764                 if (rc < 0) {
1765                         rc = -errno;
1766                         snprintf(err_str,
1767                                 sizeof(err_str),
1768                                 "\"cannot del network: %s\"", strerror(errno));
1769                 }
1770         }
1771
1772         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
1773                                  intf_on_network) {
1774                 list_del(&intf_descr->intf_on_network);
1775                 free_intf_descr(intf_descr);
1776         }
1777
1778 out:
1779         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
1780
1781         if (nids != NULL)
1782                 free(nids);
1783
1784         return rc;
1785 }
1786
1787 static int
1788 lustre_lnet_config_healthv(int value, bool all, lnet_nid_t nid,
1789                            enum lnet_health_type type, char *name,
1790                            int seq_no, struct cYAML **err_rc)
1791 {
1792         struct lnet_ioctl_reset_health_cfg data;
1793         int rc = LUSTRE_CFG_RC_NO_ERR;
1794         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1795
1796         LIBCFS_IOC_INIT_V2(data, rh_hdr);
1797         data.rh_type = type;
1798         data.rh_all = all;
1799         data.rh_value = value;
1800         data.rh_nid = nid;
1801
1802         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_SET_HEALHV, &data);
1803         if (rc != 0) {
1804                 rc = -errno;
1805                 snprintf(err_str,
1806                          sizeof(err_str), "Can not configure health value: %s",
1807                          strerror(errno));
1808         }
1809
1810         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
1811
1812         return rc;
1813 }
1814
1815 int lustre_lnet_config_ni_healthv(int value, bool all, char *ni_nid, int seq_no,
1816                                   struct cYAML **err_rc)
1817 {
1818         lnet_nid_t nid;
1819         if (ni_nid)
1820                 nid = libcfs_str2nid(ni_nid);
1821         else
1822                 nid = LNET_NID_ANY;
1823         return lustre_lnet_config_healthv(value, all, nid,
1824                                           LNET_HEALTH_TYPE_LOCAL_NI,
1825                                           "ni healthv", seq_no, err_rc);
1826 }
1827
1828 int lustre_lnet_config_peer_ni_healthv(int value, bool all, char *lpni_nid,
1829                                        int seq_no, struct cYAML **err_rc)
1830 {
1831         lnet_nid_t nid;
1832         if (lpni_nid)
1833                 nid = libcfs_str2nid(lpni_nid);
1834         else
1835                 nid = LNET_NID_ANY;
1836         return lustre_lnet_config_healthv(value, all, nid,
1837                                           LNET_HEALTH_TYPE_PEER_NI,
1838                                           "peer_ni healthv", seq_no, err_rc);
1839 }
1840
1841 static bool
1842 add_msg_stats_to_yaml_blk(struct cYAML *yaml,
1843                           struct lnet_ioctl_comm_count *counts)
1844 {
1845         if (cYAML_create_number(yaml, "put",
1846                                 counts->ico_put_count)
1847                                         == NULL)
1848                 return false;
1849         if (cYAML_create_number(yaml, "get",
1850                                 counts->ico_get_count)
1851                                         == NULL)
1852                 return false;
1853         if (cYAML_create_number(yaml, "reply",
1854                                 counts->ico_reply_count)
1855                                         == NULL)
1856                 return false;
1857         if (cYAML_create_number(yaml, "ack",
1858                                 counts->ico_ack_count)
1859                                         == NULL)
1860                 return false;
1861         if (cYAML_create_number(yaml, "hello",
1862                                 counts->ico_hello_count)
1863                                         == NULL)
1864                 return false;
1865
1866         return true;
1867 }
1868
1869 static struct lnet_ioctl_comm_count *
1870 get_counts(struct lnet_ioctl_element_msg_stats *msg_stats, int idx)
1871 {
1872         if (idx == 0)
1873                 return &msg_stats->im_send_stats;
1874         if (idx == 1)
1875                 return &msg_stats->im_recv_stats;
1876         if (idx == 2)
1877                 return &msg_stats->im_drop_stats;
1878
1879         return NULL;
1880 }
1881
1882 static int
1883 create_local_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1884                        struct cYAML *net_node)
1885 {
1886         char tmp[LNET_MAX_STR_LEN];
1887         struct cYAML *udsp_net;
1888         bool created = false;
1889         struct cYAML *pref;
1890         int i;
1891
1892         /* add the UDSP info */
1893         udsp_net = cYAML_create_object(net_node, "udsp info");
1894         if (!udsp_net)
1895                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1896
1897         if (!cYAML_create_number(udsp_net, "net priority",
1898                                  (int) udsp_info->cud_net_priority))
1899                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1900
1901         if (!cYAML_create_number(udsp_net, "nid priority",
1902                                  (int)udsp_info->cud_nid_priority))
1903                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1904
1905         pref = udsp_net;
1906
1907         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1908                 memset(tmp, 0, LNET_MAX_STR_LEN);
1909                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
1910                         break;
1911                 if (!created) {
1912                         pref = cYAML_create_object(udsp_net,
1913                                         "Preferred gateway NIDs");
1914                         if (!pref)
1915                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1916                         created = true;
1917                 }
1918                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1919                 if (!cYAML_create_string(pref, tmp,
1920                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
1921                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1922         }
1923
1924         return LUSTRE_CFG_RC_NO_ERR;
1925 }
1926
1927 static int
1928 create_remote_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1929                         struct cYAML *nid_node)
1930 {
1931         char tmp[LNET_MAX_STR_LEN];
1932         struct cYAML *udsp_nid;
1933         bool created = false;
1934         struct cYAML *pref;
1935         int i;
1936
1937         /* add the UDSP info */
1938         udsp_nid = cYAML_create_object(nid_node, "udsp info");
1939         if (!udsp_nid)
1940                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1941
1942         if (!cYAML_create_number(udsp_nid, "net priority",
1943                                  (int) udsp_info->cud_net_priority))
1944                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1945
1946         if (!cYAML_create_number(udsp_nid, "nid priority",
1947                                  (int) udsp_info->cud_nid_priority))
1948                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1949
1950         pref = udsp_nid;
1951         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1952                 memset(tmp, 0, LNET_MAX_STR_LEN);
1953                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
1954                         break;
1955                 if (!created) {
1956                         pref = cYAML_create_object(udsp_nid,
1957                                         "Preferred gateway NIDs");
1958                         if (!pref)
1959                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1960                         created = true;
1961                 }
1962                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1963                 if (!cYAML_create_string(pref, tmp,
1964                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
1965                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1966         }
1967
1968         pref = udsp_nid;
1969         created = false;
1970         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1971                 memset(tmp, 0, LNET_MAX_STR_LEN);
1972                 if (udsp_info->cud_pref_nid[i] == 0)
1973                         break;
1974                 if (!created) {
1975                         pref = cYAML_create_object(udsp_nid,
1976                                         "Preferred source NIDs");
1977                         if (!pref)
1978                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1979                         created = true;
1980                 }
1981                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1982                 if (!cYAML_create_string(pref, tmp,
1983                         libcfs_nid2str(udsp_info->cud_pref_nid[i])))
1984                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1985         }
1986
1987         return LUSTRE_CFG_RC_NO_ERR;
1988 }
1989
1990 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
1991                          struct cYAML **show_rc, struct cYAML **err_rc,
1992                          bool backup)
1993 {
1994         char *buf;
1995         struct lnet_ioctl_config_ni *ni_data;
1996         struct lnet_ioctl_config_lnd_tunables *lnd;
1997         struct lnet_ioctl_element_stats *stats;
1998         struct lnet_ioctl_element_msg_stats msg_stats;
1999         struct lnet_ioctl_local_ni_hstats hstats;
2000         struct lnet_ioctl_construct_udsp_info udsp_info;
2001         __u32 net = LNET_NET_ANY;
2002         __u32 prev_net = LNET_NET_ANY;
2003         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
2004         int l_errno = 0;
2005         struct cYAML *root = NULL, *tunables = NULL,
2006                 *net_node = NULL, *interfaces = NULL,
2007                 *item = NULL, *first_seq = NULL,
2008                 *tmp = NULL, *statistics = NULL,
2009                 *yhstats = NULL;
2010         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
2011         char str_buf[str_buf_len];
2012         char *pos;
2013         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2014         bool exist = false, new_net = true;
2015         int net_num = 0;
2016         size_t buf_size = sizeof(*ni_data) + sizeof(*lnd) + sizeof(*stats);
2017
2018         buf = calloc(1, buf_size);
2019         if (buf == NULL)
2020                 goto out;
2021
2022         ni_data = (struct lnet_ioctl_config_ni *)buf;
2023
2024         if (nw != NULL) {
2025                 net = libcfs_str2net(nw);
2026                 if (net == LNET_NET_ANY) {
2027                         snprintf(err_str,
2028                                  sizeof(err_str),
2029                                  "\"cannot parse net '%s'\"", nw);
2030                         rc = LUSTRE_CFG_RC_BAD_PARAM;
2031                         goto out;
2032                 }
2033         }
2034
2035         root = cYAML_create_object(NULL, NULL);
2036         if (root == NULL)
2037                 goto out;
2038
2039         net_node = cYAML_create_seq(root, "net");
2040         if (net_node == NULL)
2041                 goto out;
2042
2043         for (i = 0;; i++) {
2044                 __u32 rc_net;
2045
2046                 memset(buf, 0, buf_size);
2047
2048                 LIBCFS_IOC_INIT_V2(*ni_data, lic_cfg_hdr);
2049                 /*
2050                  * set the ioc_len to the proper value since INIT assumes
2051                  * size of data
2052                  */
2053                 ni_data->lic_cfg_hdr.ioc_len = buf_size;
2054                 ni_data->lic_idx = i;
2055
2056                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LOCAL_NI, ni_data);
2057                 if (rc != 0) {
2058                         l_errno = errno;
2059                         break;
2060                 }
2061
2062                 rc_net = LNET_NIDNET(ni_data->lic_nid);
2063
2064                 /* filter on provided data */
2065                 if (net != LNET_NET_ANY &&
2066                     net != rc_net)
2067                         continue;
2068
2069                 /* if we're backing up don't store lo */
2070                 if (backup && LNET_NETTYP(rc_net) == LOLND)
2071                         continue;
2072
2073                 /* default rc to -1 in case we hit the goto */
2074                 rc = -1;
2075                 exist = true;
2076
2077                 stats = (struct lnet_ioctl_element_stats *)ni_data->lic_bulk;
2078                 lnd = (struct lnet_ioctl_config_lnd_tunables *)
2079                         (ni_data->lic_bulk + sizeof(*stats));
2080
2081                 if (rc_net != prev_net) {
2082                         prev_net = rc_net;
2083                         new_net = true;
2084                         net_num++;
2085                 }
2086
2087                 if (new_net) {
2088                         if (!cYAML_create_string(net_node, "net type",
2089                                                  libcfs_net2str(rc_net)))
2090                                 goto out;
2091
2092                         tmp = cYAML_create_seq(net_node, "local NI(s)");
2093                         if (tmp == NULL)
2094                                 goto out;
2095                         new_net = false;
2096                 }
2097
2098                 /* create the tree to be printed. */
2099                 item = cYAML_create_seq_item(tmp);
2100                 if (item == NULL)
2101                         goto out;
2102
2103                 if (first_seq == NULL)
2104                         first_seq = item;
2105
2106                 if (!backup &&
2107                     cYAML_create_string(item, "nid",
2108                                         libcfs_nid2str(ni_data->lic_nid)) == NULL)
2109                         goto out;
2110
2111                 if (!backup &&
2112                     cYAML_create_string(item,
2113                                         "status",
2114                                         (ni_data->lic_status ==
2115                                           LNET_NI_STATUS_UP) ?
2116                                             "up" : "down") == NULL)
2117                         goto out;
2118
2119                 /* don't add interfaces unless there is at least one
2120                  * interface */
2121                 if (strlen(ni_data->lic_ni_intf[0]) > 0) {
2122                         interfaces = cYAML_create_object(item, "interfaces");
2123                         if (interfaces == NULL)
2124                                 goto out;
2125
2126                         for (j = 0; j < LNET_INTERFACES_NUM; j++) {
2127                                 if (strlen(ni_data->lic_ni_intf[j]) > 0) {
2128                                         snprintf(str_buf,
2129                                                  sizeof(str_buf), "%d", j);
2130                                         if (cYAML_create_string(interfaces,
2131                                                 str_buf,
2132                                                 ni_data->lic_ni_intf[j]) ==
2133                                                         NULL)
2134                                                 goto out;
2135                                 }
2136                         }
2137                 }
2138
2139                 if (detail) {
2140                         char *limit;
2141                         int k;
2142
2143                         if (backup)
2144                                 goto continue_without_msg_stats;
2145
2146                         statistics = cYAML_create_object(item, "statistics");
2147                         if (statistics == NULL)
2148                                 goto out;
2149
2150                         if (cYAML_create_number(statistics, "send_count",
2151                                                 stats->iel_send_count)
2152                                                         == NULL)
2153                                 goto out;
2154
2155                         if (cYAML_create_number(statistics, "recv_count",
2156                                                 stats->iel_recv_count)
2157                                                         == NULL)
2158                                 goto out;
2159
2160                         if (cYAML_create_number(statistics, "drop_count",
2161                                                 stats->iel_drop_count)
2162                                                         == NULL)
2163                                 goto out;
2164
2165                         if (detail < 4)
2166                                 goto continue_without_udsp_info;
2167
2168                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
2169                         udsp_info.cud_nid = ni_data->lic_nid;
2170                         udsp_info.cud_peer = false;
2171                         rc = l_ioctl(LNET_DEV_ID,
2172                                      IOC_LIBCFS_GET_CONST_UDSP_INFO,
2173                                      &udsp_info);
2174                         if (rc != 0) {
2175                                 l_errno = errno;
2176                                 goto continue_without_udsp_info;
2177                         }
2178
2179                         rc = create_local_udsp_info(&udsp_info, item);
2180                         if (rc) {
2181                                 l_errno = errno;
2182                                 goto out;
2183                         }
2184
2185 continue_without_udsp_info:
2186                         if (detail < 2)
2187                                 goto continue_without_msg_stats;
2188
2189                         LIBCFS_IOC_INIT_V2(msg_stats, im_hdr);
2190                         msg_stats.im_hdr.ioc_len = sizeof(msg_stats);
2191                         msg_stats.im_idx = i;
2192
2193                         rc = l_ioctl(LNET_DEV_ID,
2194                                      IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS,
2195                                      &msg_stats);
2196                         if (rc != 0) {
2197                                 l_errno = errno;
2198                                 goto continue_without_msg_stats;
2199                         }
2200
2201                         for (k = 0; k < 3; k++) {
2202                                 struct lnet_ioctl_comm_count *counts;
2203                                 struct cYAML *msg_statistics = NULL;
2204
2205                                 msg_statistics = cYAML_create_object(item,
2206                                                  (char *)gmsg_stat_names[k]);
2207                                 if (msg_statistics == NULL)
2208                                         goto out;
2209
2210                                 counts = get_counts(&msg_stats, k);
2211                                 if (counts == NULL)
2212                                         goto out;
2213
2214                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2215                                                                counts))
2216                                         goto out;
2217                         }
2218
2219                         LIBCFS_IOC_INIT_V2(hstats, hlni_hdr);
2220                         hstats.hlni_nid = ni_data->lic_nid;
2221                         /* grab health stats */
2222                         rc = l_ioctl(LNET_DEV_ID,
2223                                      IOC_LIBCFS_GET_LOCAL_HSTATS,
2224                                      &hstats);
2225                         if (rc != 0) {
2226                                 l_errno = errno;
2227                                 goto continue_without_msg_stats;
2228                         }
2229                         yhstats = cYAML_create_object(item, "health stats");
2230                         if (!yhstats)
2231                                 goto out;
2232                         if (cYAML_create_number(yhstats, "health value",
2233                                                 hstats.hlni_health_value)
2234                                                         == NULL)
2235                                 goto out;
2236                         if (cYAML_create_number(yhstats, "interrupts",
2237                                                 hstats.hlni_local_interrupt)
2238                                                         == NULL)
2239                                 goto out;
2240                         if (cYAML_create_number(yhstats, "dropped",
2241                                                 hstats.hlni_local_dropped)
2242                                                         == NULL)
2243                                 goto out;
2244                         if (cYAML_create_number(yhstats, "aborted",
2245                                                 hstats.hlni_local_aborted)
2246                                                         == NULL)
2247                                 goto out;
2248                         if (cYAML_create_number(yhstats, "no route",
2249                                                 hstats.hlni_local_no_route)
2250                                                         == NULL)
2251                                 goto out;
2252                         if (cYAML_create_number(yhstats, "timeouts",
2253                                                 hstats.hlni_local_timeout)
2254                                                         == NULL)
2255                                 goto out;
2256                         if (cYAML_create_number(yhstats, "error",
2257                                                 hstats.hlni_local_error)
2258                                                         == NULL)
2259                                 goto out;
2260
2261 continue_without_msg_stats:
2262                         tunables = cYAML_create_object(item, "tunables");
2263                         if (!tunables)
2264                                 goto out;
2265
2266                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
2267                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2268                                 goto out;
2269
2270                         rc = lustre_ni_show_tunables(tunables, LNET_NETTYP(rc_net),
2271                                                      &lnd->lt_tun);
2272                         if (rc != LUSTRE_CFG_RC_NO_ERR &&
2273                             rc != LUSTRE_CFG_RC_NO_MATCH)
2274                                 goto out;
2275
2276                         if (rc != LUSTRE_CFG_RC_NO_MATCH) {
2277                                 tunables = cYAML_create_object(item,
2278                                                                "lnd tunables");
2279                                 if (tunables == NULL)
2280                                         goto out;
2281                         }
2282
2283                         if (!backup &&
2284                             cYAML_create_number(item, "dev cpt",
2285                                                 ni_data->lic_dev_cpt) == NULL)
2286                                 goto out;
2287
2288                         if (!backup &&
2289                             cYAML_create_number(item, "tcp bonding",
2290                                                 ni_data->lic_tcp_bonding)
2291                                                         == NULL)
2292                                 goto out;
2293
2294                         /* out put the CPTs in the format: "[x,x,x,...]" */
2295                         pos = str_buf;
2296                         limit = str_buf + str_buf_len - 3;
2297                         pos += scnprintf(pos, limit - pos, "\"[");
2298                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2299                                 j < ni_data->lic_ncpts &&
2300                                 pos < limit; j++) {
2301                                 pos += scnprintf(pos, limit - pos,
2302                                                  "%d", ni_data->lic_cpts[j]);
2303                                 if ((j + 1) < ni_data->lic_ncpts)
2304                                         pos += scnprintf(pos, limit - pos, ",");
2305                         }
2306                         snprintf(pos, 3, "]\"");
2307
2308                         if (ni_data->lic_ncpts >= 1 &&
2309                             cYAML_create_string(item, "CPT",
2310                                                 str_buf) == NULL)
2311                                 goto out;
2312                 }
2313         }
2314
2315         /* Print out the net information only if show_rc is not provided */
2316         if (show_rc == NULL)
2317                 cYAML_print_tree(root);
2318
2319         if (l_errno != ENOENT) {
2320                 snprintf(err_str,
2321                          sizeof(err_str),
2322                          "\"cannot get networks: %s\"",
2323                          strerror(l_errno));
2324                 rc = -l_errno;
2325                 goto out;
2326         } else
2327                 rc = LUSTRE_CFG_RC_NO_ERR;
2328
2329         snprintf(err_str, sizeof(err_str), "\"success\"");
2330 out:
2331         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2332                 cYAML_free_tree(root);
2333         } else if (show_rc != NULL && *show_rc != NULL) {
2334                 struct cYAML *show_node;
2335                 /* find the net node, if one doesn't exist
2336                  * then insert one.  Otherwise add to the one there
2337                  */
2338                 show_node = cYAML_get_object_item(*show_rc, "net");
2339                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2340                         cYAML_insert_child(show_node, first_seq);
2341                         free(net_node);
2342                         free(root);
2343                 } else if (show_node == NULL) {
2344                         cYAML_insert_sibling((*show_rc)->cy_child,
2345                                                 net_node);
2346                         free(root);
2347                 } else {
2348                         cYAML_free_tree(root);
2349                 }
2350         } else {
2351                 *show_rc = root;
2352         }
2353
2354         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2355
2356         return rc;
2357 }
2358
2359 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2360 {
2361         struct lnet_ioctl_config_data data;
2362         int rc = LUSTRE_CFG_RC_NO_ERR;
2363         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2364
2365         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2366         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2367
2368         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2369         if (rc != 0) {
2370                 rc = -errno;
2371                 snprintf(err_str,
2372                          sizeof(err_str),
2373                          "\"cannot %s routing %s\"",
2374                          (enable) ? "enable" : "disable", strerror(errno));
2375                 goto out;
2376         }
2377
2378 out:
2379         cYAML_build_error(rc, seq_no,
2380                          (enable) ? ADD_CMD : DEL_CMD,
2381                          "routing", err_str, err_rc);
2382
2383         return rc;
2384 }
2385
2386 int ioctl_set_value(__u32 val, int ioc, char *name,
2387                     int seq_no, struct cYAML **err_rc)
2388 {
2389         struct lnet_ioctl_set_value data;
2390         int rc = LUSTRE_CFG_RC_NO_ERR;
2391         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2392
2393         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2394         data.sv_value = val;
2395
2396         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2397         if (rc != 0) {
2398                 rc = -errno;
2399                 snprintf(err_str,
2400                          sizeof(err_str),
2401                          "\"cannot configure %s to %d: %s\"", name,
2402                          val, strerror(errno));
2403         }
2404
2405         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2406
2407         return rc;
2408 }
2409
2410 int lustre_lnet_config_recov_intrv(int intrv, int seq_no, struct cYAML **err_rc)
2411 {
2412         int rc = LUSTRE_CFG_RC_NO_ERR;
2413         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2414         char val[LNET_MAX_STR_LEN];
2415
2416         snprintf(val, sizeof(val), "%d", intrv);
2417
2418         rc = write_sysfs_file(modparam_path, "lnet_recovery_interval", val,
2419                               1, strlen(val) + 1);
2420         if (rc)
2421                 snprintf(err_str, sizeof(err_str),
2422                          "\"cannot configure recovery interval: %s\"",
2423                          strerror(errno));
2424
2425         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_interval", err_str, err_rc);
2426
2427         return rc;
2428 }
2429
2430 int lustre_lnet_config_rtr_sensitivity(int sen, int seq_no, struct cYAML **err_rc)
2431 {
2432         int rc = LUSTRE_CFG_RC_NO_ERR;
2433         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2434         char val[LNET_MAX_STR_LEN];
2435
2436         snprintf(val, sizeof(val), "%d", sen);
2437
2438         rc = write_sysfs_file(modparam_path, "router_sensitivity_percentage", val,
2439                               1, strlen(val) + 1);
2440         if (rc)
2441                 snprintf(err_str, sizeof(err_str),
2442                          "\"cannot configure router health sensitivity: %s\"",
2443                          strerror(errno));
2444
2445         cYAML_build_error(rc, seq_no, ADD_CMD, "router_sensitivity", err_str, err_rc);
2446
2447         return rc;
2448 }
2449
2450 int lustre_lnet_config_hsensitivity(int sen, int seq_no, struct cYAML **err_rc)
2451 {
2452         int rc = LUSTRE_CFG_RC_NO_ERR;
2453         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2454         char val[LNET_MAX_STR_LEN];
2455
2456         snprintf(val, sizeof(val), "%d", sen);
2457
2458         rc = write_sysfs_file(modparam_path, "lnet_health_sensitivity", val,
2459                               1, strlen(val) + 1);
2460         if (rc)
2461                 snprintf(err_str, sizeof(err_str),
2462                          "\"cannot configure health sensitivity: %s\"",
2463                          strerror(errno));
2464
2465         cYAML_build_error(rc, seq_no, ADD_CMD, "health_sensitivity", err_str, err_rc);
2466
2467         return rc;
2468 }
2469
2470 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc)
2471 {
2472         int rc = LUSTRE_CFG_RC_NO_ERR;
2473         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2474         char val[LNET_MAX_STR_LEN];
2475
2476         snprintf(val, sizeof(val), "%d", timeout);
2477
2478         rc = write_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
2479                               1, strlen(val) + 1);
2480         if (rc)
2481                 snprintf(err_str, sizeof(err_str),
2482                          "\"cannot configure transaction timeout: %s\"",
2483                          strerror(errno));
2484
2485         cYAML_build_error(rc, seq_no, ADD_CMD, "transaction_timeout", err_str, err_rc);
2486
2487         return rc;
2488 }
2489
2490 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc)
2491 {
2492         int rc = LUSTRE_CFG_RC_NO_ERR;
2493         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2494         char val[LNET_MAX_STR_LEN];
2495
2496         snprintf(val, sizeof(val), "%d", count);
2497
2498         rc = write_sysfs_file(modparam_path, "lnet_retry_count", val,
2499                               1, strlen(val) + 1);
2500         if (rc)
2501                 snprintf(err_str, sizeof(err_str),
2502                          "\"cannot configure retry count: %s\"",
2503                          strerror(errno));
2504
2505         cYAML_build_error(rc, seq_no, ADD_CMD, "retry_count", err_str, err_rc);
2506
2507         return rc;
2508 }
2509
2510 int lustre_lnet_config_response_tracking(int val, int seq_no,
2511                                          struct cYAML **err_rc)
2512 {
2513         int rc = LUSTRE_CFG_RC_NO_ERR;
2514         char err_str[LNET_MAX_STR_LEN];
2515         char val_str[LNET_MAX_STR_LEN];
2516
2517         if (val < 0 || val > 3) {
2518                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2519                 snprintf(err_str, sizeof(err_str),
2520                          "\"Valid values are: 0, 1, 2, or 3\"");
2521         } else {
2522                 snprintf(err_str, sizeof(err_str), "\"success\"");
2523
2524                 snprintf(val_str, sizeof(val_str), "%d", val);
2525
2526                 rc = write_sysfs_file(modparam_path, "lnet_response_tracking",
2527                                       val_str, 1, strlen(val_str) + 1);
2528                 if (rc)
2529                         snprintf(err_str, sizeof(err_str),
2530                                  "\"cannot configure response tracking: %s\"",
2531                                  strerror(errno));
2532         }
2533
2534         cYAML_build_error(rc, seq_no, ADD_CMD, "response_tracking", err_str,
2535                           err_rc);
2536
2537         return rc;
2538 }
2539
2540 int lustre_lnet_config_recovery_limit(int val, int seq_no,
2541                                       struct cYAML **err_rc)
2542 {
2543         int rc = LUSTRE_CFG_RC_NO_ERR;
2544         char err_str[LNET_MAX_STR_LEN];
2545         char val_str[LNET_MAX_STR_LEN];
2546
2547         if (val < 0) {
2548                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2549                 snprintf(err_str, sizeof(err_str),
2550                          "\"Must be greater than or equal to 0\"");
2551         } else {
2552                 snprintf(err_str, sizeof(err_str), "\"success\"");
2553
2554                 snprintf(val_str, sizeof(val_str), "%d", val);
2555
2556                 rc = write_sysfs_file(modparam_path, "lnet_recovery_limit",
2557                                       val_str, 1, strlen(val_str) + 1);
2558                 if (rc)
2559                         snprintf(err_str, sizeof(err_str),
2560                                  "\"cannot configure recovery limit: %s\"",
2561                                  strerror(errno));
2562         }
2563
2564         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_limit", err_str,
2565                           err_rc);
2566
2567         return rc;
2568 }
2569
2570 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2571 {
2572         int rc = LUSTRE_CFG_RC_NO_ERR;
2573         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2574         char val[LNET_MAX_STR_LEN];
2575
2576         snprintf(val, sizeof(val), "%d", max);
2577
2578         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2579                               1, strlen(val) + 1);
2580         if (rc)
2581                 snprintf(err_str, sizeof(err_str),
2582                          "\"cannot configure max interfaces: %s\"",
2583                          strerror(errno));
2584
2585         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2586
2587         return rc;
2588 }
2589
2590 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2591 {
2592         int rc = LUSTRE_CFG_RC_NO_ERR;
2593         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2594         char val[LNET_MAX_STR_LEN];
2595
2596         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2597
2598         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2599                               1, strlen(val) + 1);
2600         if (rc)
2601                 snprintf(err_str, sizeof(err_str),
2602                          "\"cannot configure discovery: %s\"",
2603                          strerror(errno));
2604
2605         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2606
2607         return rc;
2608
2609 }
2610
2611 int lustre_lnet_config_drop_asym_route(int drop, int seq_no,
2612                                        struct cYAML **err_rc)
2613 {
2614         int rc = LUSTRE_CFG_RC_NO_ERR;
2615         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2616         char val[LNET_MAX_STR_LEN];
2617
2618         snprintf(val, sizeof(val), "%u", (drop) ? 1 : 0);
2619
2620         rc = write_sysfs_file(modparam_path, "lnet_drop_asym_route", val,
2621                               1, strlen(val) + 1);
2622         if (rc)
2623                 snprintf(err_str, sizeof(err_str),
2624                          "\"cannot configure drop asym route: %s\"",
2625                          strerror(errno));
2626
2627         cYAML_build_error(rc, seq_no, ADD_CMD, "drop_asym_route",
2628                           err_str, err_rc);
2629
2630         return rc;
2631
2632 }
2633
2634 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2635 {
2636         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2637                                "numa_range", seq_no, err_rc);
2638 }
2639
2640 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2641                                struct cYAML **err_rc)
2642 {
2643         struct lnet_ioctl_config_data data;
2644         int rc = LUSTRE_CFG_RC_NO_ERR;
2645         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2646
2647         /* -1 indicates to ignore changes to this field */
2648         if (tiny < -1 || small < -1 || large < -1) {
2649                 snprintf(err_str,
2650                          sizeof(err_str),
2651                          "\"tiny, small and large must be >= 0\"");
2652                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2653                 goto out;
2654         }
2655
2656         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2657         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2658         data.cfg_config_u.cfg_buffers.buf_small = small;
2659         data.cfg_config_u.cfg_buffers.buf_large = large;
2660
2661         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2662         if (rc != 0) {
2663                 rc = -errno;
2664                 snprintf(err_str,
2665                          sizeof(err_str),
2666                          "\"cannot configure buffers: %s\"", strerror(errno));
2667                 goto out;
2668         }
2669
2670 out:
2671         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2672
2673         return rc;
2674 }
2675
2676 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2677                              struct cYAML **err_rc, bool backup)
2678 {
2679         struct lnet_ioctl_config_data *data;
2680         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2681         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2682         int l_errno = 0;
2683         char *buf;
2684         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2685         int buf_count[LNET_NRBPOOLS] = {0};
2686         struct cYAML *root = NULL, *pools_node = NULL,
2687                      *type_node = NULL, *item = NULL, *cpt = NULL,
2688                      *first_seq = NULL, *buffers = NULL;
2689         int i, j;
2690         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2691         char node_name[LNET_MAX_STR_LEN];
2692         bool exist = false;
2693
2694         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2695         if (buf == NULL)
2696                 goto out;
2697
2698         data = (struct lnet_ioctl_config_data *)buf;
2699
2700         root = cYAML_create_object(NULL, NULL);
2701         if (root == NULL)
2702                 goto out;
2703
2704         if (backup)
2705                 pools_node = cYAML_create_object(root, "routing");
2706         else
2707                 pools_node = cYAML_create_seq(root, "routing");
2708         if (pools_node == NULL)
2709                 goto out;
2710
2711         for (i = 0;; i++) {
2712                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2713                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2714                                         sizeof(struct lnet_ioctl_pool_cfg);
2715                 data->cfg_count = i;
2716
2717                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2718                 if (rc != 0) {
2719                         l_errno = errno;
2720                         break;
2721                 }
2722
2723                 exist = true;
2724
2725                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2726
2727                 if (backup)
2728                         goto calculate_buffers;
2729
2730                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2731                 item = cYAML_create_seq_item(pools_node);
2732                 if (item == NULL)
2733                         goto out;
2734
2735                 if (first_seq == NULL)
2736                         first_seq = item;
2737
2738                 cpt = cYAML_create_object(item, node_name);
2739                 if (cpt == NULL)
2740                         goto out;
2741
2742 calculate_buffers:
2743                 /* create the tree  and print */
2744                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2745                         if (!backup) {
2746                                 type_node = cYAML_create_object(cpt, pools[j]);
2747                                 if (type_node == NULL)
2748                                         goto out;
2749                         }
2750                         if (!backup &&
2751                             cYAML_create_number(type_node, "npages",
2752                                                 pool_cfg->pl_pools[j].pl_npages)
2753                             == NULL)
2754                                 goto out;
2755                         if (!backup &&
2756                             cYAML_create_number(type_node, "nbuffers",
2757                                                 pool_cfg->pl_pools[j].
2758                                                   pl_nbuffers) == NULL)
2759                                 goto out;
2760                         if (!backup &&
2761                             cYAML_create_number(type_node, "credits",
2762                                                 pool_cfg->pl_pools[j].
2763                                                    pl_credits) == NULL)
2764                                 goto out;
2765                         if (!backup &&
2766                             cYAML_create_number(type_node, "mincredits",
2767                                                 pool_cfg->pl_pools[j].
2768                                                    pl_mincredits) == NULL)
2769                                 goto out;
2770                         /* keep track of the total count for each of the
2771                          * tiny, small and large buffers */
2772                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2773                 }
2774         }
2775
2776         if (pool_cfg != NULL) {
2777                 if (backup) {
2778                         if (cYAML_create_number(pools_node, "enable",
2779                                                 pool_cfg->pl_routing) ==
2780                         NULL)
2781                                 goto out;
2782
2783                         goto add_buffer_section;
2784                 }
2785
2786                 item = cYAML_create_seq_item(pools_node);
2787                 if (item == NULL)
2788                         goto out;
2789
2790                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2791                     NULL)
2792                         goto out;
2793         }
2794
2795 add_buffer_section:
2796         /* create a buffers entry in the show. This is necessary so that
2797          * if the YAML output is used to configure a node, the buffer
2798          * configuration takes hold */
2799         buffers = cYAML_create_object(root, "buffers");
2800         if (buffers == NULL)
2801                 goto out;
2802
2803         for (i = 0; i < LNET_NRBPOOLS; i++) {
2804                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2805                         goto out;
2806         }
2807
2808         if (show_rc == NULL)
2809                 cYAML_print_tree(root);
2810
2811         if (l_errno != ENOENT) {
2812                 snprintf(err_str,
2813                          sizeof(err_str),
2814                          "\"cannot get routing information: %s\"",
2815                          strerror(l_errno));
2816                 rc = -l_errno;
2817                 goto out;
2818         } else
2819                 rc = LUSTRE_CFG_RC_NO_ERR;
2820
2821         snprintf(err_str, sizeof(err_str), "\"success\"");
2822         rc = LUSTRE_CFG_RC_NO_ERR;
2823
2824 out:
2825         free(buf);
2826         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2827                 cYAML_free_tree(root);
2828         } else if (show_rc != NULL && *show_rc != NULL) {
2829                 struct cYAML *routing_node;
2830                 /* there should exist only one routing block and one
2831                  * buffers block. If there already exists a previous one
2832                  * then don't add another */
2833                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2834                 if (routing_node == NULL) {
2835                         cYAML_insert_sibling((*show_rc)->cy_child,
2836                                                 root->cy_child);
2837                         free(root);
2838                 } else {
2839                         cYAML_free_tree(root);
2840                 }
2841         } else {
2842                 *show_rc = root;
2843         }
2844
2845         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2846
2847         return rc;
2848 }
2849
2850 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2851                           struct cYAML **show_rc, struct cYAML **err_rc,
2852                           bool backup)
2853 {
2854         /*
2855          * TODO: This function is changing in a future patch to accommodate
2856          * PEER_LIST and proper filtering on any nid of the peer
2857          */
2858         struct lnet_ioctl_peer_cfg peer_info;
2859         struct lnet_peer_ni_credit_info *lpni_cri;
2860         struct lnet_ioctl_element_stats *lpni_stats;
2861         struct lnet_ioctl_element_msg_stats *msg_stats;
2862         struct lnet_ioctl_peer_ni_hstats *hstats;
2863         struct lnet_ioctl_construct_udsp_info udsp_info;
2864         lnet_nid_t *nidp;
2865         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2866         int i, j, k;
2867         int l_errno = 0;
2868         __u32 count;
2869         __u32 size;
2870         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2871                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2872                      *msg_statistics = NULL, *statistics = NULL,
2873                      *yhstats;
2874         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2875         struct lnet_process_id *list = NULL;
2876         void *data = NULL;
2877         void *lpni_data;
2878         bool exist = false;
2879
2880         /* create struct cYAML root object */
2881         root = cYAML_create_object(NULL, NULL);
2882         if (root == NULL)
2883                 goto out;
2884
2885         peer_root = cYAML_create_seq(root, "peer");
2886         if (peer_root == NULL)
2887                 goto out;
2888
2889         count = 1000;
2890         size = count * sizeof(struct lnet_process_id);
2891         list = malloc(size);
2892         if (list == NULL) {
2893                 l_errno = ENOMEM;
2894                 goto out;
2895         }
2896         if (knid != NULL) {
2897                 list[0].nid = libcfs_str2nid(knid);
2898                 count = 1;
2899         } else {
2900                 for (;;) {
2901                         memset(&peer_info, 0, sizeof(peer_info));
2902                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2903                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2904                         peer_info.prcfg_size = size;
2905                         peer_info.prcfg_bulk = list;
2906
2907                         l_errno = 0;
2908                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2909                                      &peer_info);
2910                         count = peer_info.prcfg_count;
2911                         if (rc == 0)
2912                                 break;
2913                         l_errno = errno;
2914                         if (l_errno != E2BIG) {
2915                                 snprintf(err_str,
2916                                         sizeof(err_str),
2917                                         "\"cannot get peer list: %s\"",
2918                                         strerror(l_errno));
2919                                 rc = -l_errno;
2920                                 goto out;
2921                         }
2922                         free(list);
2923                         size = peer_info.prcfg_size;
2924                         list = malloc(size);
2925                         if (list == NULL) {
2926                                 l_errno = ENOMEM;
2927                                 goto out;
2928                         }
2929                 }
2930         }
2931
2932         size = 4096;
2933         data = malloc(size);
2934         if (data == NULL) {
2935                 l_errno = ENOMEM;
2936                 goto out;
2937         }
2938
2939         for (i = 0; i < count; i++) {
2940                 for (;;) {
2941                         memset(&peer_info, 0, sizeof(peer_info));
2942                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2943                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2944                         peer_info.prcfg_prim_nid = list[i].nid;
2945                         peer_info.prcfg_size = size;
2946                         peer_info.prcfg_bulk = data;
2947
2948                         l_errno = 0;
2949                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
2950                                      &peer_info);
2951                         if (rc == 0)
2952                                 break;
2953                         l_errno = errno;
2954                         if (l_errno != E2BIG) {
2955                                 snprintf(err_str,
2956                                         sizeof(err_str),
2957                                         "\"cannot get peer information: %s\"",
2958                                         strerror(l_errno));
2959                                 rc = -l_errno;
2960                                 goto out;
2961                         }
2962                         free(data);
2963                         size = peer_info.prcfg_size;
2964                         data = malloc(size);
2965                         if (data == NULL) {
2966                                 l_errno = ENOMEM;
2967                                 goto out;
2968                         }
2969                 }
2970                 exist = true;
2971
2972                 peer = cYAML_create_seq_item(peer_root);
2973                 if (peer == NULL)
2974                         goto out;
2975
2976                 if (first_seq == NULL)
2977                         first_seq = peer;
2978
2979                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
2980                 if (cYAML_create_string(peer, "primary nid",
2981                                         libcfs_nid2str(pnid))
2982                     == NULL)
2983                         goto out;
2984                 if (cYAML_create_string(peer, "Multi-Rail",
2985                                         peer_info.prcfg_mr ? "True" : "False")
2986                     == NULL)
2987                         goto out;
2988                 /*
2989                  * print out the state of the peer only if details are
2990                  * requested
2991                  */
2992                 if (detail >= 3) {
2993                         if (!backup &&
2994                             cYAML_create_number(peer, "peer state",
2995                                                 peer_info.prcfg_state)
2996                                 == NULL)
2997                                 goto out;
2998                 }
2999
3000                 tmp = cYAML_create_seq(peer, "peer ni");
3001                 if (tmp == NULL)
3002                         goto out;
3003
3004                 lpni_data = data;
3005                 for (j = 0; j < peer_info.prcfg_count; j++) {
3006                         nidp = lpni_data;
3007                         lpni_cri = (void*)nidp + sizeof(nidp);
3008                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
3009                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
3010                         hstats = (void *)msg_stats + sizeof(*msg_stats);
3011                         lpni_data = (void *)hstats + sizeof(*hstats);
3012
3013                         peer_ni = cYAML_create_seq_item(tmp);
3014                         if (peer_ni == NULL)
3015                                 goto out;
3016
3017                         if (cYAML_create_string(peer_ni, "nid",
3018                                                 libcfs_nid2str(*nidp))
3019                             == NULL)
3020                                 goto out;
3021
3022                         if (backup)
3023                                 continue;
3024
3025                         if (detail < 4)
3026                                 goto continue_without_udsp_info;
3027
3028                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
3029                         udsp_info.cud_nid = *nidp;
3030                         udsp_info.cud_peer = true;
3031                         rc = l_ioctl(LNET_DEV_ID,
3032                                         IOC_LIBCFS_GET_CONST_UDSP_INFO,
3033                                         &udsp_info);
3034                         if (rc != 0) {
3035                                 l_errno = errno;
3036                                 goto continue_without_udsp_info;
3037                         }
3038
3039                         rc = create_remote_udsp_info(&udsp_info, peer_ni);
3040                         if (rc) {
3041                                 l_errno = errno;
3042                                 goto out;
3043                         }
3044
3045 continue_without_udsp_info:
3046                         if (cYAML_create_string(peer_ni, "state",
3047                                                 lpni_cri->cr_aliveness)
3048                             == NULL)
3049                                 goto out;
3050
3051                         if (!detail)
3052                                 continue;
3053
3054                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
3055                                                 lpni_cri->cr_ni_peer_tx_credits)
3056                             == NULL)
3057                                 goto out;
3058
3059                         if (cYAML_create_number(peer_ni, "available_tx_credits",
3060                                                 lpni_cri->cr_peer_tx_credits)
3061                             == NULL)
3062                                 goto out;
3063
3064                         if (cYAML_create_number(peer_ni, "min_tx_credits",
3065                                                 lpni_cri->cr_peer_min_tx_credits)
3066                             == NULL)
3067                                 goto out;
3068
3069                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
3070                                                 lpni_cri->cr_peer_tx_qnob)
3071                             == NULL)
3072                                 goto out;
3073
3074                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
3075                                                 lpni_cri->cr_peer_rtr_credits)
3076                             == NULL)
3077                                 goto out;
3078
3079                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
3080                                                 lpni_cri->cr_peer_min_rtr_credits)
3081                             == NULL)
3082                                 goto out;
3083
3084                         if (cYAML_create_number(peer_ni, "refcount",
3085                                                 lpni_cri->cr_refcount) == NULL)
3086                                 goto out;
3087
3088                         statistics = cYAML_create_object(peer_ni, "statistics");
3089                         if (statistics == NULL)
3090                                 goto out;
3091
3092                         if (cYAML_create_number(statistics, "send_count",
3093                                                 lpni_stats->iel_send_count)
3094                             == NULL)
3095                                 goto out;
3096
3097                         if (cYAML_create_number(statistics, "recv_count",
3098                                                 lpni_stats->iel_recv_count)
3099                             == NULL)
3100                                 goto out;
3101
3102                         if (cYAML_create_number(statistics, "drop_count",
3103                                                 lpni_stats->iel_drop_count)
3104                             == NULL)
3105                                 goto out;
3106
3107                         if (detail < 2)
3108                                 continue;
3109
3110                         for (k = 0; k < 3; k++) {
3111                                 struct lnet_ioctl_comm_count *counts;
3112
3113                                 msg_statistics = cYAML_create_object(peer_ni,
3114                                                  (char *) gmsg_stat_names[k]);
3115                                 if (msg_statistics == NULL)
3116                                         goto out;
3117
3118                                 counts = get_counts(msg_stats, k);
3119                                 if (counts == NULL)
3120                                         goto out;
3121
3122                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
3123                                                                counts))
3124                                         goto out;
3125                         }
3126
3127                         yhstats = cYAML_create_object(peer_ni, "health stats");
3128                         if (!yhstats)
3129                                 goto out;
3130                         if (cYAML_create_number(yhstats, "health value",
3131                                                 hstats->hlpni_health_value)
3132                                                         == NULL)
3133                                 goto out;
3134                         if (cYAML_create_number(yhstats, "dropped",
3135                                                 hstats->hlpni_remote_dropped)
3136                                                         == NULL)
3137                                 goto out;
3138                         if (cYAML_create_number(yhstats, "timeout",
3139                                                 hstats->hlpni_remote_timeout)
3140                                                         == NULL)
3141                                 goto out;
3142                         if (cYAML_create_number(yhstats, "error",
3143                                                 hstats->hlpni_remote_error)
3144                                                         == NULL)
3145                                 goto out;
3146                         if (cYAML_create_number(yhstats, "network timeout",
3147                                                 hstats->hlpni_network_timeout)
3148                                                         == NULL)
3149                                 goto out;
3150                 }
3151         }
3152
3153         /* print output iff show_rc is not provided */
3154         if (show_rc == NULL)
3155                 cYAML_print_tree(root);
3156
3157         snprintf(err_str, sizeof(err_str), "\"success\"");
3158         rc = LUSTRE_CFG_RC_NO_ERR;
3159
3160 out:
3161         free(list);
3162         free(data);
3163         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
3164                 cYAML_free_tree(root);
3165         } else if (show_rc != NULL && *show_rc != NULL) {
3166                 struct cYAML *show_node;
3167                 /* find the peer node, if one doesn't exist then
3168                  * insert one.  Otherwise add to the one there
3169                  */
3170                 show_node = cYAML_get_object_item(*show_rc,
3171                                                   "peer");
3172                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3173                         cYAML_insert_child(show_node, first_seq);
3174                         free(peer_root);
3175                         free(root);
3176                 } else if (show_node == NULL) {
3177                         cYAML_insert_sibling((*show_rc)->cy_child,
3178                                              peer_root);
3179                         free(root);
3180                 } else {
3181                         cYAML_free_tree(root);
3182                 }
3183         } else {
3184                 *show_rc = root;
3185         }
3186
3187         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3188                           err_rc);
3189
3190         return rc;
3191 }
3192
3193 int lustre_lnet_list_peer(int seq_no,
3194                           struct cYAML **show_rc, struct cYAML **err_rc)
3195 {
3196         struct lnet_ioctl_peer_cfg peer_info;
3197         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3198         __u32 count;
3199         __u32 size;
3200         int i = 0;
3201         int l_errno = 0;
3202         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
3203         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3204         struct lnet_process_id *list = NULL;
3205
3206         memset(&peer_info, 0, sizeof(peer_info));
3207
3208         /* create struct cYAML root object */
3209         root = cYAML_create_object(NULL, NULL);
3210         if (root == NULL)
3211                 goto out;
3212
3213         list_root = cYAML_create_seq(root, "peer list");
3214         if (list_root == NULL)
3215                 goto out;
3216
3217         count = 1000;
3218         size = count * sizeof(struct lnet_process_id);
3219         list = malloc(size);
3220         if (list == NULL) {
3221                 l_errno = ENOMEM;
3222                 goto out;
3223         }
3224         for (;;) {
3225                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
3226                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
3227                 peer_info.prcfg_size = size;
3228                 peer_info.prcfg_bulk = list;
3229
3230                 l_errno = 0;
3231                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
3232                 count = peer_info.prcfg_count;
3233                 if (rc == 0)
3234                         break;
3235                 l_errno = errno;
3236                 if (l_errno != E2BIG) {
3237                         snprintf(err_str,
3238                                 sizeof(err_str),
3239                                 "\"cannot get peer list: %s\"",
3240                                 strerror(l_errno));
3241                         rc = -l_errno;
3242                         goto out;
3243                 }
3244                 free(list);
3245                 size = peer_info.prcfg_size;
3246                 list = malloc(size);
3247                 if (list == NULL) {
3248                         l_errno = ENOMEM;
3249                         goto out;
3250                 }
3251         }
3252
3253         /* count is now the actual number of ids in the list. */
3254         for (i = 0; i < count; i++) {
3255                 if (cYAML_create_string(list_root, "nid",
3256                                         libcfs_nid2str(list[i].nid))
3257                     == NULL)
3258                         goto out;
3259         }
3260
3261         /* print output iff show_rc is not provided */
3262         if (show_rc == NULL)
3263                 cYAML_print_tree(root);
3264
3265         snprintf(err_str, sizeof(err_str), "\"success\"");
3266         rc = LUSTRE_CFG_RC_NO_ERR;
3267
3268 out:
3269         if (list != NULL)
3270                 free(list);
3271         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3272                 cYAML_free_tree(root);
3273         } else if (show_rc != NULL && *show_rc != NULL) {
3274                 struct cYAML *show_node;
3275                 /* find the peer node, if one doesn't exist then
3276                  * insert one.  Otherwise add to the one there
3277                  */
3278                 show_node = cYAML_get_object_item(*show_rc,
3279                                                   "peer");
3280                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3281                         cYAML_insert_child(show_node, first_seq);
3282                         free(list_root);
3283                         free(root);
3284                 } else if (show_node == NULL) {
3285                         cYAML_insert_sibling((*show_rc)->cy_child,
3286                                              list_root);
3287                         free(root);
3288                 } else {
3289                         cYAML_free_tree(root);
3290                 }
3291         } else {
3292                 *show_rc = root;
3293         }
3294
3295         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3296                           err_rc);
3297
3298         return rc;
3299 }
3300
3301 static void add_to_global(struct cYAML *show_rc, struct cYAML *node,
3302                           struct cYAML *root)
3303 {
3304         struct cYAML *show_node;
3305
3306         show_node = cYAML_get_object_item(show_rc, "global");
3307         if (show_node != NULL)
3308                 cYAML_insert_sibling(show_node->cy_child,
3309                                      node->cy_child);
3310         else
3311                 cYAML_insert_sibling(show_rc->cy_child,
3312                                      node);
3313         free(root);
3314 }
3315
3316 static int build_global_yaml_entry(char *err_str, int err_len, int seq_no,
3317                                    char *name, __u64 value,
3318                                    struct cYAML **show_rc,
3319                                    struct cYAML **err_rc, int err)
3320 {
3321         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3322         struct cYAML *root = NULL, *global = NULL;
3323
3324         if (err) {
3325                 rc = err;
3326                 goto out;
3327         }
3328
3329         root = cYAML_create_object(NULL, NULL);
3330         if (root == NULL)
3331                 goto out;
3332
3333         global = cYAML_create_object(root, "global");
3334         if (global == NULL)
3335                 goto out;
3336
3337         if (cYAML_create_number(global, name,
3338                                 value) == NULL)
3339                 goto out;
3340
3341         if (show_rc == NULL)
3342                 cYAML_print_tree(root);
3343
3344         snprintf(err_str, err_len, "\"success\"");
3345
3346         rc = LUSTRE_CFG_RC_NO_ERR;
3347
3348 out:
3349         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3350                 cYAML_free_tree(root);
3351         } else if (show_rc != NULL && *show_rc != NULL) {
3352                 add_to_global(*show_rc, global, root);
3353         } else {
3354                 *show_rc = root;
3355         }
3356
3357         cYAML_build_error(rc, seq_no, SHOW_CMD, "global", err_str, err_rc);
3358
3359         return rc;
3360 }
3361