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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, 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                           long int cpp, 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         if (LNET_NETTYP(nw_descr->nw_id) == SOCKLND && (cpp > -1))
1674                 tunables->lt_tun.lnd_tun_u.lnd_sock.lnd_conns_per_peer = cpp;
1675         else if (LNET_NETTYP(nw_descr->nw_id) == O2IBLND && (cpp > -1))
1676                 tunables->lt_tun.lnd_tun_u.lnd_o2ib.lnd_conns_per_peer = cpp;
1677
1678         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1679                                    err_str, sizeof(err_str));
1680         if (rc != 0) {
1681                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1682                 goto out;
1683         }
1684
1685         rc = lustre_lnet_ioctl_config_ni(&nw_descr->nw_intflist,
1686                                          tunables, global_cpts, nids,
1687                                          err_str);
1688
1689 out:
1690         if (nw_descr != NULL) {
1691                 list_for_each_entry_safe(intf_descr, tmp,
1692                                          &nw_descr->nw_intflist,
1693                                          intf_on_network) {
1694                         list_del(&intf_descr->intf_on_network);
1695                         free_intf_descr(intf_descr);
1696                 }
1697         }
1698
1699         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
1700
1701         if (nids)
1702                 free(nids);
1703
1704         if (data)
1705                 free(data);
1706
1707         return rc;
1708 }
1709
1710 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw_descr,
1711                        int seq_no, struct cYAML **err_rc)
1712 {
1713         struct lnet_ioctl_config_ni data;
1714         int rc = LUSTRE_CFG_RC_NO_ERR, i;
1715         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1716         lnet_nid_t *nids = NULL;
1717         __u32 nnids = 0;
1718         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1719
1720         if (nw_descr == NULL || nw_descr->nw_id == 0) {
1721                 snprintf(err_str,
1722                          sizeof(err_str),
1723                          "\"missing mandatory parameter in deleting NI: '%s'\"",
1724                          (nw_descr == NULL) ? "network , interface" :
1725                          (nw_descr->nw_id == 0) ? "network" : "interface");
1726                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1727                 goto out;
1728         }
1729
1730         if (LNET_NETTYP(nw_descr->nw_id) == LOLND)
1731                 return LUSTRE_CFG_RC_NO_ERR;
1732
1733         if (nw_descr->nw_id == LNET_NET_ANY) {
1734                 snprintf(err_str,
1735                          sizeof(err_str),
1736                          "\"cannot parse net '%s'\"",
1737                          libcfs_net2str(nw_descr->nw_id));
1738                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1739                 goto out;
1740         }
1741
1742         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1743                                    err_str, sizeof(err_str));
1744         if (rc != 0) {
1745                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1746                 goto out;
1747         }
1748
1749         /*
1750          * no interfaces just the nw_id is specified
1751          */
1752         if (nnids == 0) {
1753                 nids = calloc(1, sizeof(*nids));
1754                 if (nids == NULL) {
1755                         snprintf(err_str, sizeof(err_str),
1756                                 "\"out of memory\"");
1757                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1758                         goto out;
1759                 }
1760                 nids[0] = LNET_MKNID(nw_descr->nw_id, 0);
1761                 nnids = 1;
1762         }
1763
1764         for (i = 0; i < nnids; i++) {
1765                 LIBCFS_IOC_INIT_V2(data, lic_cfg_hdr);
1766                 data.lic_nid = nids[i];
1767
1768                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_LOCAL_NI, &data);
1769                 if (rc < 0) {
1770                         rc = -errno;
1771                         snprintf(err_str,
1772                                 sizeof(err_str),
1773                                 "\"cannot del network: %s\"", strerror(errno));
1774                 }
1775         }
1776
1777         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
1778                                  intf_on_network) {
1779                 list_del(&intf_descr->intf_on_network);
1780                 free_intf_descr(intf_descr);
1781         }
1782
1783 out:
1784         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
1785
1786         if (nids != NULL)
1787                 free(nids);
1788
1789         return rc;
1790 }
1791
1792 static int
1793 lustre_lnet_config_healthv(int value, bool all, lnet_nid_t nid,
1794                            enum lnet_health_type type, char *name,
1795                            int seq_no, struct cYAML **err_rc)
1796 {
1797         struct lnet_ioctl_reset_health_cfg data;
1798         int rc = LUSTRE_CFG_RC_NO_ERR;
1799         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1800
1801         LIBCFS_IOC_INIT_V2(data, rh_hdr);
1802         data.rh_type = type;
1803         data.rh_all = all;
1804         data.rh_value = value;
1805         data.rh_nid = nid;
1806
1807         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_SET_HEALHV, &data);
1808         if (rc != 0) {
1809                 rc = -errno;
1810                 snprintf(err_str,
1811                          sizeof(err_str), "Can not configure health value: %s",
1812                          strerror(errno));
1813         }
1814
1815         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
1816
1817         return rc;
1818 }
1819
1820
1821 static int
1822 lustre_lnet_config_conns_per_peer(int value, bool all, lnet_nid_t nid,
1823                                   char *name, int seq_no,
1824                                   struct cYAML **err_rc)
1825 {
1826         struct lnet_ioctl_reset_conns_per_peer_cfg data;
1827         int rc = LUSTRE_CFG_RC_NO_ERR;
1828         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1829
1830         LIBCFS_IOC_INIT_V2(data, rcpp_hdr);
1831         data.rcpp_all = all;
1832         data.rcpp_value = value;
1833         data.rcpp_nid = nid;
1834
1835         if (value < 0 || value > 127) {
1836                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1837                 snprintf(err_str, sizeof(err_str),
1838                          "\"Valid values are: 0-127\"");
1839         } else {
1840
1841                 rc = l_ioctl(LNET_DEV_ID,
1842                              IOC_LIBCFS_SET_CONNS_PER_PEER, &data);
1843                 if (rc != 0) {
1844                         rc = -errno;
1845                         snprintf(err_str,
1846                                  sizeof(err_str),
1847                                  "Can not configure conns_per_peer value: %s",
1848                                  strerror(errno));
1849                 }
1850         }
1851         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
1852
1853         return rc;
1854 }
1855
1856 int lustre_lnet_config_ni_healthv(int value, bool all, char *ni_nid, int seq_no,
1857                                   struct cYAML **err_rc)
1858 {
1859         lnet_nid_t nid;
1860         if (ni_nid)
1861                 nid = libcfs_str2nid(ni_nid);
1862         else
1863                 nid = LNET_NID_ANY;
1864         return lustre_lnet_config_healthv(value, all, nid,
1865                                           LNET_HEALTH_TYPE_LOCAL_NI,
1866                                           "ni healthv", seq_no, err_rc);
1867 }
1868
1869 int lustre_lnet_config_peer_ni_healthv(int value, bool all, char *lpni_nid,
1870                                        int seq_no, struct cYAML **err_rc)
1871 {
1872         lnet_nid_t nid;
1873         if (lpni_nid)
1874                 nid = libcfs_str2nid(lpni_nid);
1875         else
1876                 nid = LNET_NID_ANY;
1877         return lustre_lnet_config_healthv(value, all, nid,
1878                                           LNET_HEALTH_TYPE_PEER_NI,
1879                                           "peer_ni healthv", seq_no, err_rc);
1880 }
1881
1882 int lustre_lnet_config_ni_conns_per_peer(int value, bool all, char *ni_nid,
1883                                          int seq_no, struct cYAML **err_rc)
1884 {
1885         lnet_nid_t nid;
1886
1887         if (ni_nid)
1888                 nid = libcfs_str2nid(ni_nid);
1889         else
1890                 nid = LNET_NID_ANY;
1891         return lustre_lnet_config_conns_per_peer(value, all, nid,
1892                                                  "ni conns_per_peer",
1893                                                  seq_no, err_rc);
1894 }
1895
1896 static bool
1897 add_msg_stats_to_yaml_blk(struct cYAML *yaml,
1898                           struct lnet_ioctl_comm_count *counts)
1899 {
1900         if (cYAML_create_number(yaml, "put",
1901                                 counts->ico_put_count)
1902                                         == NULL)
1903                 return false;
1904         if (cYAML_create_number(yaml, "get",
1905                                 counts->ico_get_count)
1906                                         == NULL)
1907                 return false;
1908         if (cYAML_create_number(yaml, "reply",
1909                                 counts->ico_reply_count)
1910                                         == NULL)
1911                 return false;
1912         if (cYAML_create_number(yaml, "ack",
1913                                 counts->ico_ack_count)
1914                                         == NULL)
1915                 return false;
1916         if (cYAML_create_number(yaml, "hello",
1917                                 counts->ico_hello_count)
1918                                         == NULL)
1919                 return false;
1920
1921         return true;
1922 }
1923
1924 static struct lnet_ioctl_comm_count *
1925 get_counts(struct lnet_ioctl_element_msg_stats *msg_stats, int idx)
1926 {
1927         if (idx == 0)
1928                 return &msg_stats->im_send_stats;
1929         if (idx == 1)
1930                 return &msg_stats->im_recv_stats;
1931         if (idx == 2)
1932                 return &msg_stats->im_drop_stats;
1933
1934         return NULL;
1935 }
1936
1937 static int
1938 create_local_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1939                        struct cYAML *net_node)
1940 {
1941         char tmp[LNET_MAX_STR_LEN];
1942         struct cYAML *udsp_net;
1943         bool created = false;
1944         struct cYAML *pref;
1945         int i;
1946
1947         /* add the UDSP info */
1948         udsp_net = cYAML_create_object(net_node, "udsp info");
1949         if (!udsp_net)
1950                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1951
1952         if (!cYAML_create_number(udsp_net, "net priority",
1953                                  (int) udsp_info->cud_net_priority))
1954                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1955
1956         if (!cYAML_create_number(udsp_net, "nid priority",
1957                                  (int)udsp_info->cud_nid_priority))
1958                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1959
1960         pref = udsp_net;
1961
1962         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1963                 memset(tmp, 0, LNET_MAX_STR_LEN);
1964                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
1965                         break;
1966                 if (!created) {
1967                         pref = cYAML_create_object(udsp_net,
1968                                         "Preferred gateway NIDs");
1969                         if (!pref)
1970                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1971                         created = true;
1972                 }
1973                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1974                 if (!cYAML_create_string(pref, tmp,
1975                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
1976                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1977         }
1978
1979         return LUSTRE_CFG_RC_NO_ERR;
1980 }
1981
1982 static int
1983 create_remote_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1984                         struct cYAML *nid_node)
1985 {
1986         char tmp[LNET_MAX_STR_LEN];
1987         struct cYAML *udsp_nid;
1988         bool created = false;
1989         struct cYAML *pref;
1990         int i;
1991
1992         /* add the UDSP info */
1993         udsp_nid = cYAML_create_object(nid_node, "udsp info");
1994         if (!udsp_nid)
1995                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1996
1997         if (!cYAML_create_number(udsp_nid, "net priority",
1998                                  (int) udsp_info->cud_net_priority))
1999                 return LUSTRE_CFG_RC_OUT_OF_MEM;
2000
2001         if (!cYAML_create_number(udsp_nid, "nid priority",
2002                                  (int) udsp_info->cud_nid_priority))
2003                 return LUSTRE_CFG_RC_OUT_OF_MEM;
2004
2005         pref = udsp_nid;
2006         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
2007                 memset(tmp, 0, LNET_MAX_STR_LEN);
2008                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
2009                         break;
2010                 if (!created) {
2011                         pref = cYAML_create_object(udsp_nid,
2012                                         "Preferred gateway NIDs");
2013                         if (!pref)
2014                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
2015                         created = true;
2016                 }
2017                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
2018                 if (!cYAML_create_string(pref, tmp,
2019                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
2020                         return LUSTRE_CFG_RC_OUT_OF_MEM;
2021         }
2022
2023         pref = udsp_nid;
2024         created = false;
2025         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
2026                 memset(tmp, 0, LNET_MAX_STR_LEN);
2027                 if (udsp_info->cud_pref_nid[i] == 0)
2028                         break;
2029                 if (!created) {
2030                         pref = cYAML_create_object(udsp_nid,
2031                                         "Preferred source NIDs");
2032                         if (!pref)
2033                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
2034                         created = true;
2035                 }
2036                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
2037                 if (!cYAML_create_string(pref, tmp,
2038                         libcfs_nid2str(udsp_info->cud_pref_nid[i])))
2039                         return LUSTRE_CFG_RC_OUT_OF_MEM;
2040         }
2041
2042         return LUSTRE_CFG_RC_NO_ERR;
2043 }
2044
2045 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
2046                          struct cYAML **show_rc, struct cYAML **err_rc,
2047                          bool backup)
2048 {
2049         char *buf;
2050         struct lnet_ioctl_config_ni *ni_data;
2051         struct lnet_ioctl_config_lnd_tunables *lnd;
2052         struct lnet_ioctl_element_stats *stats;
2053         struct lnet_ioctl_element_msg_stats msg_stats;
2054         struct lnet_ioctl_local_ni_hstats hstats;
2055         struct lnet_ioctl_construct_udsp_info udsp_info;
2056         __u32 net = LNET_NET_ANY;
2057         __u32 prev_net = LNET_NET_ANY;
2058         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
2059         int l_errno = 0;
2060         struct cYAML *root = NULL, *tunables = NULL,
2061                 *net_node = NULL, *interfaces = NULL,
2062                 *item = NULL, *first_seq = NULL,
2063                 *tmp = NULL, *statistics = NULL,
2064                 *yhstats = NULL;
2065         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
2066         char str_buf[str_buf_len];
2067         char *pos;
2068         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2069         bool exist = false, new_net = true;
2070         int net_num = 0;
2071         size_t buf_size = sizeof(*ni_data) + sizeof(*lnd) + sizeof(*stats);
2072
2073         buf = calloc(1, buf_size);
2074         if (buf == NULL)
2075                 goto out;
2076
2077         ni_data = (struct lnet_ioctl_config_ni *)buf;
2078
2079         if (nw != NULL) {
2080                 net = libcfs_str2net(nw);
2081                 if (net == LNET_NET_ANY) {
2082                         snprintf(err_str,
2083                                  sizeof(err_str),
2084                                  "\"cannot parse net '%s'\"", nw);
2085                         rc = LUSTRE_CFG_RC_BAD_PARAM;
2086                         goto out;
2087                 }
2088         }
2089
2090         root = cYAML_create_object(NULL, NULL);
2091         if (root == NULL)
2092                 goto out;
2093
2094         net_node = cYAML_create_seq(root, "net");
2095         if (net_node == NULL)
2096                 goto out;
2097
2098         for (i = 0;; i++) {
2099                 __u32 rc_net;
2100
2101                 memset(buf, 0, buf_size);
2102
2103                 LIBCFS_IOC_INIT_V2(*ni_data, lic_cfg_hdr);
2104                 /*
2105                  * set the ioc_len to the proper value since INIT assumes
2106                  * size of data
2107                  */
2108                 ni_data->lic_cfg_hdr.ioc_len = buf_size;
2109                 ni_data->lic_idx = i;
2110
2111                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LOCAL_NI, ni_data);
2112                 if (rc != 0) {
2113                         l_errno = errno;
2114                         break;
2115                 }
2116
2117                 rc_net = LNET_NIDNET(ni_data->lic_nid);
2118
2119                 /* filter on provided data */
2120                 if (net != LNET_NET_ANY &&
2121                     net != rc_net)
2122                         continue;
2123
2124                 /* if we're backing up don't store lo */
2125                 if (backup && LNET_NETTYP(rc_net) == LOLND)
2126                         continue;
2127
2128                 /* default rc to -1 in case we hit the goto */
2129                 rc = -1;
2130                 exist = true;
2131
2132                 stats = (struct lnet_ioctl_element_stats *)ni_data->lic_bulk;
2133                 lnd = (struct lnet_ioctl_config_lnd_tunables *)
2134                         (ni_data->lic_bulk + sizeof(*stats));
2135
2136                 if (rc_net != prev_net) {
2137                         prev_net = rc_net;
2138                         new_net = true;
2139                         net_num++;
2140                 }
2141
2142                 if (new_net) {
2143                         if (!cYAML_create_string(net_node, "net type",
2144                                                  libcfs_net2str(rc_net)))
2145                                 goto out;
2146
2147                         tmp = cYAML_create_seq(net_node, "local NI(s)");
2148                         if (tmp == NULL)
2149                                 goto out;
2150                         new_net = false;
2151                 }
2152
2153                 /* create the tree to be printed. */
2154                 item = cYAML_create_seq_item(tmp);
2155                 if (item == NULL)
2156                         goto out;
2157
2158                 if (first_seq == NULL)
2159                         first_seq = item;
2160
2161                 if (!backup &&
2162                     cYAML_create_string(item, "nid",
2163                                         libcfs_nid2str(ni_data->lic_nid)) == NULL)
2164                         goto out;
2165
2166                 if (!backup &&
2167                     cYAML_create_string(item,
2168                                         "status",
2169                                         (ni_data->lic_status ==
2170                                           LNET_NI_STATUS_UP) ?
2171                                             "up" : "down") == NULL)
2172                         goto out;
2173
2174                 /* don't add interfaces unless there is at least one
2175                  * interface */
2176                 if (strlen(ni_data->lic_ni_intf) > 0) {
2177                         interfaces = cYAML_create_object(item, "interfaces");
2178                         if (interfaces == NULL)
2179                                 goto out;
2180
2181                         snprintf(str_buf, sizeof(str_buf), "%d", 0);
2182                         if (cYAML_create_string(interfaces, str_buf,
2183                                                 ni_data->lic_ni_intf) == NULL)
2184                                 goto out;
2185                 }
2186
2187                 if (detail) {
2188                         char *limit;
2189                         int k;
2190
2191                         if (backup)
2192                                 goto continue_without_msg_stats;
2193
2194                         statistics = cYAML_create_object(item, "statistics");
2195                         if (statistics == NULL)
2196                                 goto out;
2197
2198                         if (cYAML_create_number(statistics, "send_count",
2199                                                 stats->iel_send_count)
2200                                                         == NULL)
2201                                 goto out;
2202
2203                         if (cYAML_create_number(statistics, "recv_count",
2204                                                 stats->iel_recv_count)
2205                                                         == NULL)
2206                                 goto out;
2207
2208                         if (cYAML_create_number(statistics, "drop_count",
2209                                                 stats->iel_drop_count)
2210                                                         == NULL)
2211                                 goto out;
2212
2213                         if (detail < 4)
2214                                 goto continue_without_udsp_info;
2215
2216                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
2217                         udsp_info.cud_nid = ni_data->lic_nid;
2218                         udsp_info.cud_peer = false;
2219                         rc = l_ioctl(LNET_DEV_ID,
2220                                      IOC_LIBCFS_GET_CONST_UDSP_INFO,
2221                                      &udsp_info);
2222                         if (rc != 0) {
2223                                 l_errno = errno;
2224                                 goto continue_without_udsp_info;
2225                         }
2226
2227                         rc = create_local_udsp_info(&udsp_info, item);
2228                         if (rc) {
2229                                 l_errno = errno;
2230                                 goto out;
2231                         }
2232
2233 continue_without_udsp_info:
2234                         if (detail < 2)
2235                                 goto continue_without_msg_stats;
2236
2237                         LIBCFS_IOC_INIT_V2(msg_stats, im_hdr);
2238                         msg_stats.im_hdr.ioc_len = sizeof(msg_stats);
2239                         msg_stats.im_idx = i;
2240
2241                         rc = l_ioctl(LNET_DEV_ID,
2242                                      IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS,
2243                                      &msg_stats);
2244                         if (rc != 0) {
2245                                 l_errno = errno;
2246                                 goto continue_without_msg_stats;
2247                         }
2248
2249                         for (k = 0; k < 3; k++) {
2250                                 struct lnet_ioctl_comm_count *counts;
2251                                 struct cYAML *msg_statistics = NULL;
2252
2253                                 msg_statistics = cYAML_create_object(item,
2254                                                  (char *)gmsg_stat_names[k]);
2255                                 if (msg_statistics == NULL)
2256                                         goto out;
2257
2258                                 counts = get_counts(&msg_stats, k);
2259                                 if (counts == NULL)
2260                                         goto out;
2261
2262                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2263                                                                counts))
2264                                         goto out;
2265                         }
2266
2267                         LIBCFS_IOC_INIT_V2(hstats, hlni_hdr);
2268                         hstats.hlni_nid = ni_data->lic_nid;
2269                         /* grab health stats */
2270                         rc = l_ioctl(LNET_DEV_ID,
2271                                      IOC_LIBCFS_GET_LOCAL_HSTATS,
2272                                      &hstats);
2273                         if (rc != 0) {
2274                                 l_errno = errno;
2275                                 goto continue_without_msg_stats;
2276                         }
2277                         yhstats = cYAML_create_object(item, "health stats");
2278                         if (!yhstats)
2279                                 goto out;
2280                         if (cYAML_create_number(yhstats, "fatal_error",
2281                                                 hstats.hlni_fatal_error)
2282                                                         == NULL)
2283                                 goto out;
2284                         if (cYAML_create_number(yhstats, "health value",
2285                                                 hstats.hlni_health_value)
2286                                                         == NULL)
2287                                 goto out;
2288                         if (cYAML_create_number(yhstats, "interrupts",
2289                                                 hstats.hlni_local_interrupt)
2290                                                         == NULL)
2291                                 goto out;
2292                         if (cYAML_create_number(yhstats, "dropped",
2293                                                 hstats.hlni_local_dropped)
2294                                                         == NULL)
2295                                 goto out;
2296                         if (cYAML_create_number(yhstats, "aborted",
2297                                                 hstats.hlni_local_aborted)
2298                                                         == NULL)
2299                                 goto out;
2300                         if (cYAML_create_number(yhstats, "no route",
2301                                                 hstats.hlni_local_no_route)
2302                                                         == NULL)
2303                                 goto out;
2304                         if (cYAML_create_number(yhstats, "timeouts",
2305                                                 hstats.hlni_local_timeout)
2306                                                         == NULL)
2307                                 goto out;
2308                         if (cYAML_create_number(yhstats, "error",
2309                                                 hstats.hlni_local_error)
2310                                                         == NULL)
2311                                 goto out;
2312                         if (cYAML_create_number(yhstats, "ping_count",
2313                                                 hstats.hlni_ping_count)
2314                                                         == NULL)
2315                                 goto out;
2316                         if (cYAML_create_number(yhstats, "next_ping",
2317                                                 hstats.hlni_next_ping)
2318                                                         == NULL)
2319                                 goto out;
2320
2321 continue_without_msg_stats:
2322                         tunables = cYAML_create_object(item, "tunables");
2323                         if (!tunables)
2324                                 goto out;
2325
2326                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
2327                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2328                                 goto out;
2329
2330                         if (rc != LUSTRE_CFG_RC_NO_MATCH) {
2331                                 tunables = cYAML_create_object(item,
2332                                                                "lnd tunables");
2333                                 if (tunables == NULL)
2334                                         goto out;
2335                         }
2336
2337                         rc = lustre_ni_show_tunables(tunables,
2338                                                      LNET_NETTYP(rc_net),
2339                                                      &lnd->lt_tun);
2340                         if (rc != LUSTRE_CFG_RC_NO_ERR &&
2341                             rc != LUSTRE_CFG_RC_NO_MATCH)
2342                                 goto out;
2343
2344                         if (!backup &&
2345                             cYAML_create_number(item, "dev cpt",
2346                                                 ni_data->lic_dev_cpt) == NULL)
2347                                 goto out;
2348
2349                         /* out put the CPTs in the format: "[x,x,x,...]" */
2350                         pos = str_buf;
2351                         limit = str_buf + str_buf_len - 3;
2352                         pos += scnprintf(pos, limit - pos, "\"[");
2353                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2354                                 j < ni_data->lic_ncpts &&
2355                                 pos < limit; j++) {
2356                                 pos += scnprintf(pos, limit - pos,
2357                                                  "%d", ni_data->lic_cpts[j]);
2358                                 if ((j + 1) < ni_data->lic_ncpts)
2359                                         pos += scnprintf(pos, limit - pos, ",");
2360                         }
2361                         snprintf(pos, 3, "]\"");
2362
2363                         if (ni_data->lic_ncpts >= 1 &&
2364                             cYAML_create_string(item, "CPT",
2365                                                 str_buf) == NULL)
2366                                 goto out;
2367                 }
2368         }
2369
2370         /* Print out the net information only if show_rc is not provided */
2371         if (show_rc == NULL)
2372                 cYAML_print_tree(root);
2373
2374         if (l_errno != ENOENT) {
2375                 snprintf(err_str,
2376                          sizeof(err_str),
2377                          "\"cannot get networks: %s\"",
2378                          strerror(l_errno));
2379                 rc = -l_errno;
2380                 goto out;
2381         } else
2382                 rc = LUSTRE_CFG_RC_NO_ERR;
2383
2384         snprintf(err_str, sizeof(err_str), "\"success\"");
2385 out:
2386         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2387                 cYAML_free_tree(root);
2388         } else if (show_rc != NULL && *show_rc != NULL) {
2389                 struct cYAML *show_node;
2390                 /* find the net node, if one doesn't exist
2391                  * then insert one.  Otherwise add to the one there
2392                  */
2393                 show_node = cYAML_get_object_item(*show_rc, "net");
2394                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2395                         cYAML_insert_child(show_node, first_seq);
2396                         free(net_node);
2397                         free(root);
2398                 } else if (show_node == NULL) {
2399                         cYAML_insert_sibling((*show_rc)->cy_child,
2400                                                 net_node);
2401                         free(root);
2402                 } else {
2403                         cYAML_free_tree(root);
2404                 }
2405         } else {
2406                 *show_rc = root;
2407         }
2408
2409         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2410
2411         return rc;
2412 }
2413
2414 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2415 {
2416         struct lnet_ioctl_config_data data;
2417         int rc = LUSTRE_CFG_RC_NO_ERR;
2418         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2419
2420         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2421         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2422
2423         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2424         if (rc != 0) {
2425                 rc = -errno;
2426                 snprintf(err_str,
2427                          sizeof(err_str),
2428                          "\"cannot %s routing %s\"",
2429                          (enable) ? "enable" : "disable", strerror(errno));
2430                 goto out;
2431         }
2432
2433 out:
2434         cYAML_build_error(rc, seq_no,
2435                          (enable) ? ADD_CMD : DEL_CMD,
2436                          "routing", err_str, err_rc);
2437
2438         return rc;
2439 }
2440
2441 int ioctl_set_value(__u32 val, int ioc, char *name,
2442                     int seq_no, struct cYAML **err_rc)
2443 {
2444         struct lnet_ioctl_set_value data;
2445         int rc = LUSTRE_CFG_RC_NO_ERR;
2446         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2447
2448         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2449         data.sv_value = val;
2450
2451         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2452         if (rc != 0) {
2453                 rc = -errno;
2454                 snprintf(err_str,
2455                          sizeof(err_str),
2456                          "\"cannot configure %s to %d: %s\"", name,
2457                          val, strerror(errno));
2458         }
2459
2460         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2461
2462         return rc;
2463 }
2464
2465 int lustre_lnet_config_recov_intrv(int intrv, int seq_no, struct cYAML **err_rc)
2466 {
2467         int rc = LUSTRE_CFG_RC_NO_ERR;
2468         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2469         char val[LNET_MAX_STR_LEN];
2470
2471         snprintf(val, sizeof(val), "%d", intrv);
2472
2473         rc = write_sysfs_file(modparam_path, "lnet_recovery_interval", val,
2474                               1, strlen(val) + 1);
2475         if (rc)
2476                 snprintf(err_str, sizeof(err_str),
2477                          "\"cannot configure recovery interval: %s\"",
2478                          strerror(errno));
2479
2480         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_interval", err_str, err_rc);
2481
2482         return rc;
2483 }
2484
2485 int lustre_lnet_config_rtr_sensitivity(int sen, int seq_no, struct cYAML **err_rc)
2486 {
2487         int rc = LUSTRE_CFG_RC_NO_ERR;
2488         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2489         char val[LNET_MAX_STR_LEN];
2490
2491         snprintf(val, sizeof(val), "%d", sen);
2492
2493         rc = write_sysfs_file(modparam_path, "router_sensitivity_percentage", val,
2494                               1, strlen(val) + 1);
2495         if (rc)
2496                 snprintf(err_str, sizeof(err_str),
2497                          "\"cannot configure router health sensitivity: %s\"",
2498                          strerror(errno));
2499
2500         cYAML_build_error(rc, seq_no, ADD_CMD, "router_sensitivity", err_str, err_rc);
2501
2502         return rc;
2503 }
2504
2505 int lustre_lnet_config_hsensitivity(int sen, int seq_no, struct cYAML **err_rc)
2506 {
2507         int rc = LUSTRE_CFG_RC_NO_ERR;
2508         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2509         char val[LNET_MAX_STR_LEN];
2510
2511         snprintf(val, sizeof(val), "%d", sen);
2512
2513         rc = write_sysfs_file(modparam_path, "lnet_health_sensitivity", val,
2514                               1, strlen(val) + 1);
2515         if (rc)
2516                 snprintf(err_str, sizeof(err_str),
2517                          "\"cannot configure health sensitivity: %s\"",
2518                          strerror(errno));
2519
2520         cYAML_build_error(rc, seq_no, ADD_CMD, "health_sensitivity", err_str, err_rc);
2521
2522         return rc;
2523 }
2524
2525 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc)
2526 {
2527         int rc = LUSTRE_CFG_RC_NO_ERR;
2528         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2529         char val[LNET_MAX_STR_LEN];
2530
2531         snprintf(val, sizeof(val), "%d", timeout);
2532
2533         rc = write_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
2534                               1, strlen(val) + 1);
2535         if (rc)
2536                 snprintf(err_str, sizeof(err_str),
2537                          "\"cannot configure transaction timeout: %s\"",
2538                          strerror(errno));
2539
2540         cYAML_build_error(rc, seq_no, ADD_CMD, "transaction_timeout", err_str, err_rc);
2541
2542         return rc;
2543 }
2544
2545 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc)
2546 {
2547         int rc = LUSTRE_CFG_RC_NO_ERR;
2548         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2549         char val[LNET_MAX_STR_LEN];
2550
2551         snprintf(val, sizeof(val), "%d", count);
2552
2553         rc = write_sysfs_file(modparam_path, "lnet_retry_count", val,
2554                               1, strlen(val) + 1);
2555         if (rc)
2556                 snprintf(err_str, sizeof(err_str),
2557                          "\"cannot configure retry count: %s\"",
2558                          strerror(errno));
2559
2560         cYAML_build_error(rc, seq_no, ADD_CMD, "retry_count", err_str, err_rc);
2561
2562         return rc;
2563 }
2564
2565 int lustre_lnet_config_response_tracking(int val, int seq_no,
2566                                          struct cYAML **err_rc)
2567 {
2568         int rc = LUSTRE_CFG_RC_NO_ERR;
2569         char err_str[LNET_MAX_STR_LEN];
2570         char val_str[LNET_MAX_STR_LEN];
2571
2572         if (val < 0 || val > 3) {
2573                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2574                 snprintf(err_str, sizeof(err_str),
2575                          "\"Valid values are: 0, 1, 2, or 3\"");
2576         } else {
2577                 snprintf(err_str, sizeof(err_str), "\"success\"");
2578
2579                 snprintf(val_str, sizeof(val_str), "%d", val);
2580
2581                 rc = write_sysfs_file(modparam_path, "lnet_response_tracking",
2582                                       val_str, 1, strlen(val_str) + 1);
2583                 if (rc)
2584                         snprintf(err_str, sizeof(err_str),
2585                                  "\"cannot configure response tracking: %s\"",
2586                                  strerror(errno));
2587         }
2588
2589         cYAML_build_error(rc, seq_no, ADD_CMD, "response_tracking", err_str,
2590                           err_rc);
2591
2592         return rc;
2593 }
2594
2595 int lustre_lnet_config_recovery_limit(int val, int seq_no,
2596                                       struct cYAML **err_rc)
2597 {
2598         int rc = LUSTRE_CFG_RC_NO_ERR;
2599         char err_str[LNET_MAX_STR_LEN];
2600         char val_str[LNET_MAX_STR_LEN];
2601
2602         if (val < 0) {
2603                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2604                 snprintf(err_str, sizeof(err_str),
2605                          "\"Must be greater than or equal to 0\"");
2606         } else {
2607                 snprintf(err_str, sizeof(err_str), "\"success\"");
2608
2609                 snprintf(val_str, sizeof(val_str), "%d", val);
2610
2611                 rc = write_sysfs_file(modparam_path, "lnet_recovery_limit",
2612                                       val_str, 1, strlen(val_str) + 1);
2613                 if (rc)
2614                         snprintf(err_str, sizeof(err_str),
2615                                  "\"cannot configure recovery limit: %s\"",
2616                                  strerror(errno));
2617         }
2618
2619         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_limit", err_str,
2620                           err_rc);
2621
2622         return rc;
2623 }
2624
2625 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2626 {
2627         int rc = LUSTRE_CFG_RC_NO_ERR;
2628         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2629         char val[LNET_MAX_STR_LEN];
2630
2631         snprintf(val, sizeof(val), "%d", max);
2632
2633         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2634                               1, strlen(val) + 1);
2635         if (rc)
2636                 snprintf(err_str, sizeof(err_str),
2637                          "\"cannot configure max interfaces: %s\"",
2638                          strerror(errno));
2639
2640         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2641
2642         return rc;
2643 }
2644
2645 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2646 {
2647         int rc = LUSTRE_CFG_RC_NO_ERR;
2648         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2649         char val[LNET_MAX_STR_LEN];
2650
2651         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2652
2653         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2654                               1, strlen(val) + 1);
2655         if (rc)
2656                 snprintf(err_str, sizeof(err_str),
2657                          "\"cannot configure discovery: %s\"",
2658                          strerror(errno));
2659
2660         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2661
2662         return rc;
2663
2664 }
2665
2666 int lustre_lnet_config_drop_asym_route(int drop, int seq_no,
2667                                        struct cYAML **err_rc)
2668 {
2669         int rc = LUSTRE_CFG_RC_NO_ERR;
2670         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2671         char val[LNET_MAX_STR_LEN];
2672
2673         snprintf(val, sizeof(val), "%u", (drop) ? 1 : 0);
2674
2675         rc = write_sysfs_file(modparam_path, "lnet_drop_asym_route", val,
2676                               1, strlen(val) + 1);
2677         if (rc)
2678                 snprintf(err_str, sizeof(err_str),
2679                          "\"cannot configure drop asym route: %s\"",
2680                          strerror(errno));
2681
2682         cYAML_build_error(rc, seq_no, ADD_CMD, "drop_asym_route",
2683                           err_str, err_rc);
2684
2685         return rc;
2686
2687 }
2688
2689 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2690 {
2691         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2692                                "numa_range", seq_no, err_rc);
2693 }
2694
2695 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2696                                struct cYAML **err_rc)
2697 {
2698         struct lnet_ioctl_config_data data;
2699         int rc = LUSTRE_CFG_RC_NO_ERR;
2700         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2701
2702         /* -1 indicates to ignore changes to this field */
2703         if (tiny < -1 || small < -1 || large < -1) {
2704                 snprintf(err_str,
2705                          sizeof(err_str),
2706                          "\"tiny, small and large must be >= 0\"");
2707                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2708                 goto out;
2709         }
2710
2711         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2712         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2713         data.cfg_config_u.cfg_buffers.buf_small = small;
2714         data.cfg_config_u.cfg_buffers.buf_large = large;
2715
2716         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2717         if (rc != 0) {
2718                 rc = -errno;
2719                 snprintf(err_str,
2720                          sizeof(err_str),
2721                          "\"cannot configure buffers: %s\"", strerror(errno));
2722                 goto out;
2723         }
2724
2725 out:
2726         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2727
2728         return rc;
2729 }
2730
2731 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2732                              struct cYAML **err_rc, bool backup)
2733 {
2734         struct lnet_ioctl_config_data *data;
2735         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2736         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2737         int l_errno = 0;
2738         char *buf;
2739         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2740         int buf_count[LNET_NRBPOOLS] = {0};
2741         struct cYAML *root = NULL, *pools_node = NULL,
2742                      *type_node = NULL, *item = NULL, *cpt = NULL,
2743                      *first_seq = NULL, *buffers = NULL;
2744         int i, j;
2745         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2746         char node_name[LNET_MAX_STR_LEN];
2747         bool exist = false;
2748
2749         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2750         if (buf == NULL)
2751                 goto out;
2752
2753         data = (struct lnet_ioctl_config_data *)buf;
2754
2755         root = cYAML_create_object(NULL, NULL);
2756         if (root == NULL)
2757                 goto out;
2758
2759         if (backup)
2760                 pools_node = cYAML_create_object(root, "routing");
2761         else
2762                 pools_node = cYAML_create_seq(root, "routing");
2763         if (pools_node == NULL)
2764                 goto out;
2765
2766         for (i = 0;; i++) {
2767                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2768                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2769                                         sizeof(struct lnet_ioctl_pool_cfg);
2770                 data->cfg_count = i;
2771
2772                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2773                 if (rc != 0) {
2774                         l_errno = errno;
2775                         break;
2776                 }
2777
2778                 exist = true;
2779
2780                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2781
2782                 if (backup)
2783                         goto calculate_buffers;
2784
2785                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2786                 item = cYAML_create_seq_item(pools_node);
2787                 if (item == NULL)
2788                         goto out;
2789
2790                 if (first_seq == NULL)
2791                         first_seq = item;
2792
2793                 cpt = cYAML_create_object(item, node_name);
2794                 if (cpt == NULL)
2795                         goto out;
2796
2797 calculate_buffers:
2798                 /* create the tree  and print */
2799                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2800                         if (!backup) {
2801                                 type_node = cYAML_create_object(cpt, pools[j]);
2802                                 if (type_node == NULL)
2803                                         goto out;
2804                         }
2805                         if (!backup &&
2806                             cYAML_create_number(type_node, "npages",
2807                                                 pool_cfg->pl_pools[j].pl_npages)
2808                             == NULL)
2809                                 goto out;
2810                         if (!backup &&
2811                             cYAML_create_number(type_node, "nbuffers",
2812                                                 pool_cfg->pl_pools[j].
2813                                                   pl_nbuffers) == NULL)
2814                                 goto out;
2815                         if (!backup &&
2816                             cYAML_create_number(type_node, "credits",
2817                                                 pool_cfg->pl_pools[j].
2818                                                    pl_credits) == NULL)
2819                                 goto out;
2820                         if (!backup &&
2821                             cYAML_create_number(type_node, "mincredits",
2822                                                 pool_cfg->pl_pools[j].
2823                                                    pl_mincredits) == NULL)
2824                                 goto out;
2825                         /* keep track of the total count for each of the
2826                          * tiny, small and large buffers */
2827                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2828                 }
2829         }
2830
2831         if (pool_cfg != NULL) {
2832                 if (backup) {
2833                         if (cYAML_create_number(pools_node, "enable",
2834                                                 pool_cfg->pl_routing) ==
2835                         NULL)
2836                                 goto out;
2837
2838                         goto add_buffer_section;
2839                 }
2840
2841                 item = cYAML_create_seq_item(pools_node);
2842                 if (item == NULL)
2843                         goto out;
2844
2845                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2846                     NULL)
2847                         goto out;
2848         }
2849
2850 add_buffer_section:
2851         /* create a buffers entry in the show. This is necessary so that
2852          * if the YAML output is used to configure a node, the buffer
2853          * configuration takes hold */
2854         buffers = cYAML_create_object(root, "buffers");
2855         if (buffers == NULL)
2856                 goto out;
2857
2858         for (i = 0; i < LNET_NRBPOOLS; i++) {
2859                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2860                         goto out;
2861         }
2862
2863         if (show_rc == NULL)
2864                 cYAML_print_tree(root);
2865
2866         if (l_errno != ENOENT) {
2867                 snprintf(err_str,
2868                          sizeof(err_str),
2869                          "\"cannot get routing information: %s\"",
2870                          strerror(l_errno));
2871                 rc = -l_errno;
2872                 goto out;
2873         } else
2874                 rc = LUSTRE_CFG_RC_NO_ERR;
2875
2876         snprintf(err_str, sizeof(err_str), "\"success\"");
2877         rc = LUSTRE_CFG_RC_NO_ERR;
2878
2879 out:
2880         free(buf);
2881         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2882                 cYAML_free_tree(root);
2883         } else if (show_rc != NULL && *show_rc != NULL) {
2884                 struct cYAML *routing_node;
2885                 /* there should exist only one routing block and one
2886                  * buffers block. If there already exists a previous one
2887                  * then don't add another */
2888                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2889                 if (routing_node == NULL) {
2890                         cYAML_insert_sibling((*show_rc)->cy_child,
2891                                                 root->cy_child);
2892                         free(root);
2893                 } else {
2894                         cYAML_free_tree(root);
2895                 }
2896         } else {
2897                 *show_rc = root;
2898         }
2899
2900         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2901
2902         return rc;
2903 }
2904
2905 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2906                           struct cYAML **show_rc, struct cYAML **err_rc,
2907                           bool backup)
2908 {
2909         /*
2910          * TODO: This function is changing in a future patch to accommodate
2911          * PEER_LIST and proper filtering on any nid of the peer
2912          */
2913         struct lnet_ioctl_peer_cfg peer_info;
2914         struct lnet_peer_ni_credit_info *lpni_cri;
2915         struct lnet_ioctl_element_stats *lpni_stats;
2916         struct lnet_ioctl_element_msg_stats *msg_stats;
2917         struct lnet_ioctl_peer_ni_hstats *hstats;
2918         struct lnet_ioctl_construct_udsp_info udsp_info;
2919         lnet_nid_t *nidp;
2920         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2921         int i, j, k;
2922         int l_errno = 0;
2923         __u32 count;
2924         __u32 size;
2925         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2926                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2927                      *msg_statistics = NULL, *statistics = NULL,
2928                      *yhstats;
2929         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2930         struct lnet_process_id *list = NULL;
2931         void *data = NULL;
2932         void *lpni_data;
2933         bool exist = false;
2934
2935         /* create struct cYAML root object */
2936         root = cYAML_create_object(NULL, NULL);
2937         if (root == NULL)
2938                 goto out;
2939
2940         peer_root = cYAML_create_seq(root, "peer");
2941         if (peer_root == NULL)
2942                 goto out;
2943
2944         count = 1000;
2945         size = count * sizeof(struct lnet_process_id);
2946         list = malloc(size);
2947         if (list == NULL) {
2948                 l_errno = ENOMEM;
2949                 goto out;
2950         }
2951         if (knid != NULL) {
2952                 list[0].nid = libcfs_str2nid(knid);
2953                 count = 1;
2954         } else {
2955                 for (;;) {
2956                         memset(&peer_info, 0, sizeof(peer_info));
2957                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2958                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2959                         peer_info.prcfg_size = size;
2960                         peer_info.prcfg_bulk = list;
2961
2962                         l_errno = 0;
2963                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2964                                      &peer_info);
2965                         count = peer_info.prcfg_count;
2966                         if (rc == 0)
2967                                 break;
2968                         l_errno = errno;
2969                         if (l_errno != E2BIG) {
2970                                 snprintf(err_str,
2971                                         sizeof(err_str),
2972                                         "\"cannot get peer list: %s\"",
2973                                         strerror(l_errno));
2974                                 rc = -l_errno;
2975                                 goto out;
2976                         }
2977                         free(list);
2978                         size = peer_info.prcfg_size;
2979                         list = malloc(size);
2980                         if (list == NULL) {
2981                                 l_errno = ENOMEM;
2982                                 goto out;
2983                         }
2984                 }
2985         }
2986
2987         size = 4096;
2988         data = malloc(size);
2989         if (data == NULL) {
2990                 l_errno = ENOMEM;
2991                 goto out;
2992         }
2993
2994         for (i = 0; i < count; i++) {
2995                 for (;;) {
2996                         memset(&peer_info, 0, sizeof(peer_info));
2997                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2998                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2999                         peer_info.prcfg_prim_nid = list[i].nid;
3000                         peer_info.prcfg_size = size;
3001                         peer_info.prcfg_bulk = data;
3002
3003                         l_errno = 0;
3004                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
3005                                      &peer_info);
3006                         if (rc == 0)
3007                                 break;
3008                         l_errno = errno;
3009                         if (l_errno != E2BIG) {
3010                                 snprintf(err_str,
3011                                         sizeof(err_str),
3012                                         "\"cannot get peer information: %s\"",
3013                                         strerror(l_errno));
3014                                 rc = -l_errno;
3015                                 goto out;
3016                         }
3017                         free(data);
3018                         size = peer_info.prcfg_size;
3019                         data = malloc(size);
3020                         if (data == NULL) {
3021                                 l_errno = ENOMEM;
3022                                 goto out;
3023                         }
3024                 }
3025                 exist = true;
3026
3027                 peer = cYAML_create_seq_item(peer_root);
3028                 if (peer == NULL)
3029                         goto out;
3030
3031                 if (first_seq == NULL)
3032                         first_seq = peer;
3033
3034                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
3035                 if (cYAML_create_string(peer, "primary nid",
3036                                         libcfs_nid2str(pnid))
3037                     == NULL)
3038                         goto out;
3039                 if (cYAML_create_string(peer, "Multi-Rail",
3040                                         peer_info.prcfg_mr ? "True" : "False")
3041                     == NULL)
3042                         goto out;
3043                 /*
3044                  * print out the state of the peer only if details are
3045                  * requested
3046                  */
3047                 if (detail >= 3) {
3048                         if (!backup &&
3049                             cYAML_create_number(peer, "peer state",
3050                                                 peer_info.prcfg_state)
3051                                 == NULL)
3052                                 goto out;
3053                 }
3054
3055                 tmp = cYAML_create_seq(peer, "peer ni");
3056                 if (tmp == NULL)
3057                         goto out;
3058
3059                 lpni_data = data;
3060                 for (j = 0; j < peer_info.prcfg_count; j++) {
3061                         nidp = lpni_data;
3062                         lpni_cri = (void*)nidp + sizeof(nidp);
3063                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
3064                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
3065                         hstats = (void *)msg_stats + sizeof(*msg_stats);
3066                         lpni_data = (void *)hstats + sizeof(*hstats);
3067
3068                         peer_ni = cYAML_create_seq_item(tmp);
3069                         if (peer_ni == NULL)
3070                                 goto out;
3071
3072                         if (cYAML_create_string(peer_ni, "nid",
3073                                                 libcfs_nid2str(*nidp))
3074                             == NULL)
3075                                 goto out;
3076
3077                         if (backup)
3078                                 continue;
3079
3080                         if (detail < 4)
3081                                 goto continue_without_udsp_info;
3082
3083                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
3084                         udsp_info.cud_nid = *nidp;
3085                         udsp_info.cud_peer = true;
3086                         rc = l_ioctl(LNET_DEV_ID,
3087                                         IOC_LIBCFS_GET_CONST_UDSP_INFO,
3088                                         &udsp_info);
3089                         if (rc != 0) {
3090                                 l_errno = errno;
3091                                 goto continue_without_udsp_info;
3092                         }
3093
3094                         rc = create_remote_udsp_info(&udsp_info, peer_ni);
3095                         if (rc) {
3096                                 l_errno = errno;
3097                                 goto out;
3098                         }
3099
3100 continue_without_udsp_info:
3101                         if (cYAML_create_string(peer_ni, "state",
3102                                                 lpni_cri->cr_aliveness)
3103                             == NULL)
3104                                 goto out;
3105
3106                         if (!detail)
3107                                 continue;
3108
3109                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
3110                                                 lpni_cri->cr_ni_peer_tx_credits)
3111                             == NULL)
3112                                 goto out;
3113
3114                         if (cYAML_create_number(peer_ni, "available_tx_credits",
3115                                                 lpni_cri->cr_peer_tx_credits)
3116                             == NULL)
3117                                 goto out;
3118
3119                         if (cYAML_create_number(peer_ni, "min_tx_credits",
3120                                                 lpni_cri->cr_peer_min_tx_credits)
3121                             == NULL)
3122                                 goto out;
3123
3124                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
3125                                                 lpni_cri->cr_peer_tx_qnob)
3126                             == NULL)
3127                                 goto out;
3128
3129                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
3130                                                 lpni_cri->cr_peer_rtr_credits)
3131                             == NULL)
3132                                 goto out;
3133
3134                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
3135                                                 lpni_cri->cr_peer_min_rtr_credits)
3136                             == NULL)
3137                                 goto out;
3138
3139                         if (cYAML_create_number(peer_ni, "refcount",
3140                                                 lpni_cri->cr_refcount) == NULL)
3141                                 goto out;
3142
3143                         statistics = cYAML_create_object(peer_ni, "statistics");
3144                         if (statistics == NULL)
3145                                 goto out;
3146
3147                         if (cYAML_create_number(statistics, "send_count",
3148                                                 lpni_stats->iel_send_count)
3149                             == NULL)
3150                                 goto out;
3151
3152                         if (cYAML_create_number(statistics, "recv_count",
3153                                                 lpni_stats->iel_recv_count)
3154                             == NULL)
3155                                 goto out;
3156
3157                         if (cYAML_create_number(statistics, "drop_count",
3158                                                 lpni_stats->iel_drop_count)
3159                             == NULL)
3160                                 goto out;
3161
3162                         if (detail < 2)
3163                                 continue;
3164
3165                         for (k = 0; k < 3; k++) {
3166                                 struct lnet_ioctl_comm_count *counts;
3167
3168                                 msg_statistics = cYAML_create_object(peer_ni,
3169                                                  (char *) gmsg_stat_names[k]);
3170                                 if (msg_statistics == NULL)
3171                                         goto out;
3172
3173                                 counts = get_counts(msg_stats, k);
3174                                 if (counts == NULL)
3175                                         goto out;
3176
3177                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
3178                                                                counts))
3179                                         goto out;
3180                         }
3181
3182                         yhstats = cYAML_create_object(peer_ni, "health stats");
3183                         if (!yhstats)
3184                                 goto out;
3185                         if (cYAML_create_number(yhstats, "health value",
3186                                                 hstats->hlpni_health_value)
3187                                                         == NULL)
3188                                 goto out;
3189                         if (cYAML_create_number(yhstats, "dropped",
3190                                                 hstats->hlpni_remote_dropped)
3191                                                         == NULL)
3192                                 goto out;
3193                         if (cYAML_create_number(yhstats, "timeout",
3194                                                 hstats->hlpni_remote_timeout)
3195                                                         == NULL)
3196                                 goto out;
3197                         if (cYAML_create_number(yhstats, "error",
3198                                                 hstats->hlpni_remote_error)
3199                                                         == NULL)
3200                                 goto out;
3201                         if (cYAML_create_number(yhstats, "network timeout",
3202                                                 hstats->hlpni_network_timeout)
3203                                                         == NULL)
3204                                 goto out;
3205                         if (cYAML_create_number(yhstats, "ping_count",
3206                                                 hstats->hlpni_ping_count)
3207                                                         == NULL)
3208                                 goto out;
3209
3210                         if (cYAML_create_number(yhstats, "next_ping",
3211                                                 hstats->hlpni_next_ping)
3212                                                         == NULL)
3213                                 goto out;
3214
3215                 }
3216         }
3217
3218         /* print output iff show_rc is not provided */
3219         if (show_rc == NULL)
3220                 cYAML_print_tree(root);
3221
3222         snprintf(err_str, sizeof(err_str), "\"success\"");
3223         rc = LUSTRE_CFG_RC_NO_ERR;
3224
3225 out:
3226         free(list);
3227         free(data);
3228         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
3229                 cYAML_free_tree(root);
3230         } else if (show_rc != NULL && *show_rc != NULL) {
3231                 struct cYAML *show_node;
3232                 /* find the peer node, if one doesn't exist then
3233                  * insert one.  Otherwise add to the one there
3234                  */
3235                 show_node = cYAML_get_object_item(*show_rc,
3236                                                   "peer");
3237                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3238                         cYAML_insert_child(show_node, first_seq);
3239                         free(peer_root);
3240                         free(root);
3241                 } else if (show_node == NULL) {
3242                         cYAML_insert_sibling((*show_rc)->cy_child,
3243                                              peer_root);
3244                         free(root);
3245                 } else {
3246                         cYAML_free_tree(root);
3247                 }
3248         } else {
3249                 *show_rc = root;
3250         }
3251
3252         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3253                           err_rc);
3254
3255         return rc;
3256 }
3257
3258 int lustre_lnet_list_peer(int seq_no,
3259                           struct cYAML **show_rc, struct cYAML **err_rc)
3260 {
3261         struct lnet_ioctl_peer_cfg peer_info;
3262         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3263         __u32 count;
3264         __u32 size;
3265         int i = 0;
3266         int l_errno = 0;
3267         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
3268         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3269         struct lnet_process_id *list = NULL;
3270
3271         memset(&peer_info, 0, sizeof(peer_info));
3272
3273         /* create struct cYAML root object */
3274         root = cYAML_create_object(NULL, NULL);
3275         if (root == NULL)
3276                 goto out;
3277
3278         list_root = cYAML_create_seq(root, "peer list");
3279         if (list_root == NULL)
3280                 goto out;
3281
3282         count = 1000;
3283         size = count * sizeof(struct lnet_process_id);
3284         list = malloc(size);
3285         if (list == NULL) {
3286                 l_errno = ENOMEM;
3287                 goto out;
3288         }
3289         for (;;) {
3290                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
3291                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
3292                 peer_info.prcfg_size = size;
3293                 peer_info.prcfg_bulk = list;
3294
3295                 l_errno = 0;
3296                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
3297                 count = peer_info.prcfg_count;
3298                 if (rc == 0)
3299                         break;
3300                 l_errno = errno;
3301                 if (l_errno != E2BIG) {
3302                         snprintf(err_str,
3303                                 sizeof(err_str),
3304                                 "\"cannot get peer list: %s\"",
3305                                 strerror(l_errno));
3306                         rc = -l_errno;
3307                         goto out;
3308                 }
3309                 free(list);
3310                 size = peer_info.prcfg_size;
3311                 list = malloc(size);
3312                 if (list == NULL) {
3313                         l_errno = ENOMEM;
3314                         goto out;
3315                 }
3316         }
3317
3318         /* count is now the actual number of ids in the list. */
3319         for (i = 0; i < count; i++) {
3320                 if (cYAML_create_string(list_root, "nid",
3321                                         libcfs_nid2str(list[i].nid))
3322                     == NULL)
3323                         goto out;
3324         }
3325
3326         /* print output iff show_rc is not provided */
3327         if (show_rc == NULL)
3328                 cYAML_print_tree(root);
3329
3330         snprintf(err_str, sizeof(err_str), "\"success\"");
3331         rc = LUSTRE_CFG_RC_NO_ERR;
3332
3333 out:
3334         if (list != NULL)
3335                 free(list);
3336         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3337                 cYAML_free_tree(root);
3338         } else if (show_rc != NULL && *show_rc != NULL) {
3339                 struct cYAML *show_node;
3340                 /* find the peer node, if one doesn't exist then
3341                  * insert one.  Otherwise add to the one there
3342                  */
3343                 show_node = cYAML_get_object_item(*show_rc,
3344                                                   "peer");
3345                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3346                         cYAML_insert_child(show_node, first_seq);
3347                         free(list_root);
3348                         free(root);
3349                 } else if (show_node == NULL) {
3350                         cYAML_insert_sibling((*show_rc)->cy_child,
3351                                              list_root);