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LU-11304 misc: update all url links to whamcloud
[fs/lustre-release.git] / lnet / lnet / router_proc.c
1 /*
2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
3  *
4  * Copyright (c) 2011, 2017, Intel Corporation.
5  *
6  *   This file is part of Lustre, https://wiki.whamcloud.com/
7  *
8  *   Portals is free software; you can redistribute it and/or
9  *   modify it under the terms of version 2 of the GNU General Public
10  *   License as published by the Free Software Foundation.
11  *
12  *   Portals is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with Portals; if not, write to the Free Software
19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  *
21  */
22
23 #define DEBUG_SUBSYSTEM S_LNET
24
25 #include <linux/uaccess.h>
26
27 #include <libcfs/libcfs.h>
28 #include <lnet/lib-lnet.h>
29
30 /* This is really lnet_proc.c. You might need to update sanity test 215
31  * if any file format is changed. */
32
33 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
34 /*
35  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
36  */
37 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
38 /* change version, 16 bits or 8 bits */
39 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
40
41 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
42 /*
43  * bits for peer hash offset
44  * NB: we don't use the highest bit of *ppos because it's signed
45  */
46 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
47                                  LNET_PROC_CPT_BITS -    \
48                                  LNET_PROC_VER_BITS -    \
49                                  LNET_PROC_HASH_BITS - 1)
50 /* bits for hash index + position */
51 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
52 /* bits for peer hash table + hash version */
53 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
54
55 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
56 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
57 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
58 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
59
60 #define LNET_PROC_CPT_GET(pos)                          \
61         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
62
63 #define LNET_PROC_VER_GET(pos)                          \
64         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
65
66 #define LNET_PROC_HASH_GET(pos)                         \
67         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
68
69 #define LNET_PROC_HOFF_GET(pos)                         \
70         (int)((pos) & LNET_PROC_HOFF_MASK)
71
72 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
73         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
74         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
75         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
76         ((off) & LNET_PROC_HOFF_MASK))
77
78 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
79
80 static int __proc_lnet_stats(void *data, int write,
81                              loff_t pos, void __user *buffer, int nob)
82 {
83         int              rc;
84         struct lnet_counters *ctrs;
85         int              len;
86         char            *tmpstr;
87         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
88
89         if (write) {
90                 lnet_counters_reset();
91                 return 0;
92         }
93
94         /* read */
95
96         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
97         if (ctrs == NULL)
98                 return -ENOMEM;
99
100         LIBCFS_ALLOC(tmpstr, tmpsiz);
101         if (tmpstr == NULL) {
102                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
103                 return -ENOMEM;
104         }
105
106         lnet_counters_get(ctrs);
107
108         len = snprintf(tmpstr, tmpsiz,
109                        "%u %u %u %u %u %u %u %llu %llu "
110                        "%llu %llu",
111                        ctrs->msgs_alloc, ctrs->msgs_max,
112                        ctrs->errors,
113                        ctrs->send_count, ctrs->recv_count,
114                        ctrs->route_count, ctrs->drop_count,
115                        ctrs->send_length, ctrs->recv_length,
116                        ctrs->route_length, ctrs->drop_length);
117
118         if (pos >= min_t(int, len, strlen(tmpstr)))
119                 rc = 0;
120         else
121                 rc = cfs_trace_copyout_string(buffer, nob,
122                                               tmpstr + pos, "\n");
123
124         LIBCFS_FREE(tmpstr, tmpsiz);
125         LIBCFS_FREE(ctrs, sizeof(*ctrs));
126         return rc;
127 }
128
129 static int
130 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
131                 size_t *lenp, loff_t *ppos)
132 {
133         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
134                                     __proc_lnet_stats);
135 }
136
137 static int
138 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
139                  size_t *lenp, loff_t *ppos)
140 {
141         const int       tmpsiz = 256;
142         char            *tmpstr;
143         char            *s;
144         int             rc = 0;
145         int             len;
146         int             ver;
147         int             off;
148
149         CLASSERT(sizeof(loff_t) >= 4);
150
151         off = LNET_PROC_HOFF_GET(*ppos);
152         ver = LNET_PROC_VER_GET(*ppos);
153
154         LASSERT(!write);
155
156         if (*lenp == 0)
157                 return 0;
158
159         LIBCFS_ALLOC(tmpstr, tmpsiz);
160         if (tmpstr == NULL)
161                 return -ENOMEM;
162
163         s = tmpstr; /* points to current position in tmpstr[] */
164
165         if (*ppos == 0) {
166                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
167                               the_lnet.ln_routing ? "enabled" : "disabled");
168                 LASSERT(tmpstr + tmpsiz - s > 0);
169
170                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
171                               "net", "hops", "priority", "state", "router");
172                 LASSERT(tmpstr + tmpsiz - s > 0);
173
174                 lnet_net_lock(0);
175                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
176                 lnet_net_unlock(0);
177                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
178         } else {
179                 struct list_head        *n;
180                 struct list_head        *r;
181                 struct lnet_route               *route = NULL;
182                 struct lnet_remotenet   *rnet  = NULL;
183                 int                     skip  = off - 1;
184                 struct list_head        *rn_list;
185                 int                     i;
186
187                 lnet_net_lock(0);
188
189                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
190                         lnet_net_unlock(0);
191                         LIBCFS_FREE(tmpstr, tmpsiz);
192                         return -ESTALE;
193                 }
194
195                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
196                      i++) {
197                         rn_list = &the_lnet.ln_remote_nets_hash[i];
198
199                         n = rn_list->next;
200
201                         while (n != rn_list && route == NULL) {
202                                 rnet = list_entry(n, struct lnet_remotenet,
203                                                   lrn_list);
204
205                                 r = rnet->lrn_routes.next;
206
207                                 while (r != &rnet->lrn_routes) {
208                                         struct lnet_route *re =
209                                                 list_entry(r, struct lnet_route,
210                                                            lr_list);
211                                         if (skip == 0) {
212                                                 route = re;
213                                                 break;
214                                         }
215
216                                         skip--;
217                                         r = r->next;
218                                 }
219
220                                 n = n->next;
221                         }
222                 }
223
224                 if (route != NULL) {
225                         __u32        net        = rnet->lrn_net;
226                         __u32 hops              = route->lr_hops;
227                         unsigned int priority   = route->lr_priority;
228                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
229                         int          alive      = lnet_is_route_alive(route);
230
231                         s += snprintf(s, tmpstr + tmpsiz - s,
232                                       "%-8s %4d %8u %7s %s\n",
233                                       libcfs_net2str(net), hops,
234                                       priority,
235                                       alive ? "up" : "down",
236                                       libcfs_nid2str(nid));
237                         LASSERT(tmpstr + tmpsiz - s > 0);
238                 }
239
240                 lnet_net_unlock(0);
241         }
242
243         len = s - tmpstr;     /* how many bytes was written */
244
245         if (len > *lenp) {    /* linux-supplied buffer is too small */
246                 rc = -EINVAL;
247         } else if (len > 0) { /* wrote something */
248                 if (copy_to_user(buffer, tmpstr, len))
249                         rc = -EFAULT;
250                 else {
251                         off += 1;
252                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
253                 }
254         }
255
256         LIBCFS_FREE(tmpstr, tmpsiz);
257
258         if (rc == 0)
259                 *lenp = len;
260
261         return rc;
262 }
263
264 static int
265 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
266                   size_t *lenp, loff_t *ppos)
267 {
268         int        rc = 0;
269         char      *tmpstr;
270         char      *s;
271         const int  tmpsiz = 256;
272         int        len;
273         int        ver;
274         int        off;
275
276         off = LNET_PROC_HOFF_GET(*ppos);
277         ver = LNET_PROC_VER_GET(*ppos);
278
279         LASSERT(!write);
280
281         if (*lenp == 0)
282                 return 0;
283
284         LIBCFS_ALLOC(tmpstr, tmpsiz);
285         if (tmpstr == NULL)
286                 return -ENOMEM;
287
288         s = tmpstr; /* points to current position in tmpstr[] */
289
290         if (*ppos == 0) {
291                 s += snprintf(s, tmpstr + tmpsiz - s,
292                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
293                               "ref", "rtr_ref", "alive_cnt", "state",
294                               "last_ping", "ping_sent", "deadline",
295                               "down_ni", "router");
296                 LASSERT(tmpstr + tmpsiz - s > 0);
297
298                 lnet_net_lock(0);
299                 ver = (unsigned int)the_lnet.ln_routers_version;
300                 lnet_net_unlock(0);
301                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
302         } else {
303                 struct list_head *r;
304                 struct lnet_peer_ni *peer = NULL;
305                 int               skip = off - 1;
306
307                 lnet_net_lock(0);
308
309                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
310                         lnet_net_unlock(0);
311
312                         LIBCFS_FREE(tmpstr, tmpsiz);
313                         return -ESTALE;
314                 }
315
316                 r = the_lnet.ln_routers.next;
317
318                 while (r != &the_lnet.ln_routers) {
319                         struct lnet_peer_ni *lp =
320                           list_entry(r, struct lnet_peer_ni,
321                                      lpni_rtr_list);
322
323                         if (skip == 0) {
324                                 peer = lp;
325                                 break;
326                         }
327
328                         skip--;
329                         r = r->next;
330                 }
331
332                 if (peer != NULL) {
333                         lnet_nid_t nid = peer->lpni_nid;
334                         time64_t now = ktime_get_seconds();
335                         time64_t deadline = peer->lpni_ping_deadline;
336                         int nrefs     = atomic_read(&peer->lpni_refcount);
337                         int nrtrrefs  = peer->lpni_rtr_refcount;
338                         int alive_cnt = peer->lpni_alive_count;
339                         int alive     = peer->lpni_alive;
340                         int pingsent  = !peer->lpni_ping_notsent;
341                         time64_t last_ping = now - peer->lpni_ping_timestamp;
342                         int down_ni   = 0;
343                         struct lnet_route *rtr;
344
345                         if ((peer->lpni_ping_feats &
346                              LNET_PING_FEAT_NI_STATUS) != 0) {
347                                 list_for_each_entry(rtr, &peer->lpni_routes,
348                                                     lr_gwlist) {
349                                         /* downis on any route should be the
350                                          * number of downis on the gateway */
351                                         if (rtr->lr_downis != 0) {
352                                                 down_ni = rtr->lr_downis;
353                                                 break;
354                                         }
355                                 }
356                         }
357
358                         if (deadline == 0)
359                                 s += snprintf(s, tmpstr + tmpsiz - s,
360                                               "%-4d %7d %9d %6s %12llu %9d %8s %7d %s\n",
361                                               nrefs, nrtrrefs, alive_cnt,
362                                               alive ? "up" : "down", last_ping,
363                                               pingsent, "NA", down_ni,
364                                               libcfs_nid2str(nid));
365                         else
366                                 s += snprintf(s, tmpstr + tmpsiz - s,
367                                               "%-4d %7d %9d %6s %12llu %9d %8llu %7d %s\n",
368                                               nrefs, nrtrrefs, alive_cnt,
369                                               alive ? "up" : "down", last_ping,
370                                               pingsent,
371                                               deadline - now,
372                                               down_ni, libcfs_nid2str(nid));
373                         LASSERT(tmpstr + tmpsiz - s > 0);
374                 }
375
376                 lnet_net_unlock(0);
377         }
378
379         len = s - tmpstr;     /* how many bytes was written */
380
381         if (len > *lenp) {    /* linux-supplied buffer is too small */
382                 rc = -EINVAL;
383         } else if (len > 0) { /* wrote something */
384                 if (copy_to_user(buffer, tmpstr, len))
385                         rc = -EFAULT;
386                 else {
387                         off += 1;
388                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
389                 }
390         }
391
392         LIBCFS_FREE(tmpstr, tmpsiz);
393
394         if (rc == 0)
395                 *lenp = len;
396
397         return rc;
398 }
399
400 /* TODO: there should be no direct access to ptable. We should add a set
401  * of APIs that give access to the ptable and its members */
402 static int
403 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
404                 size_t *lenp, loff_t *ppos)
405 {
406         const int               tmpsiz  = 256;
407         struct lnet_peer_table  *ptable;
408         char                    *tmpstr = NULL;
409         char                    *s;
410         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
411         int                     ver  = LNET_PROC_VER_GET(*ppos);
412         int                     hash = LNET_PROC_HASH_GET(*ppos);
413         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
414         int                     rc = 0;
415         int                     len;
416
417         if (write) {
418                 int i;
419                 struct lnet_peer_ni *peer;
420
421                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
422                         lnet_net_lock(i);
423                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
424                                 list_for_each_entry(peer,
425                                                     &ptable->pt_hash[hash],
426                                                     lpni_hashlist) {
427                                         peer->lpni_mintxcredits =
428                                                 peer->lpni_txcredits;
429                                         peer->lpni_minrtrcredits =
430                                                 peer->lpni_rtrcredits;
431                                 }
432                         }
433                         lnet_net_unlock(i);
434                 }
435                 *ppos += *lenp;
436                 return 0;
437         }
438
439         if (*lenp == 0)
440                 return 0;
441
442         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
443
444         if (cpt >= LNET_CPT_NUMBER) {
445                 *lenp = 0;
446                 return 0;
447         }
448
449         LIBCFS_ALLOC(tmpstr, tmpsiz);
450         if (tmpstr == NULL)
451                 return -ENOMEM;
452
453         s = tmpstr; /* points to current position in tmpstr[] */
454
455         if (*ppos == 0) {
456                 s += snprintf(s, tmpstr + tmpsiz - s,
457                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
458                               "nid", "refs", "state", "last", "max",
459                               "rtr", "min", "tx", "min", "queue");
460                 LASSERT(tmpstr + tmpsiz - s > 0);
461
462                 hoff++;
463         } else {
464                 struct lnet_peer_ni     *peer;
465                 struct list_head        *p;
466                 int                     skip;
467
468  again:
469                 p = NULL;
470                 peer = NULL;
471                 skip = hoff - 1;
472
473                 lnet_net_lock(cpt);
474                 ptable = the_lnet.ln_peer_tables[cpt];
475                 if (hoff == 1)
476                         ver = LNET_PROC_VERSION(ptable->pt_version);
477
478                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
479                         lnet_net_unlock(cpt);
480                         LIBCFS_FREE(tmpstr, tmpsiz);
481                         return -ESTALE;
482                 }
483
484                 while (hash < LNET_PEER_HASH_SIZE) {
485                         if (p == NULL)
486                                 p = ptable->pt_hash[hash].next;
487
488                         while (p != &ptable->pt_hash[hash]) {
489                                 struct lnet_peer_ni *lp =
490                                   list_entry(p, struct lnet_peer_ni,
491                                              lpni_hashlist);
492                                 if (skip == 0) {
493                                         peer = lp;
494
495                                         /* minor optimization: start from idx+1
496                                          * on next iteration if we've just
497                                          * drained lpni_hashlist */
498                                         if (lp->lpni_hashlist.next ==
499                                             &ptable->pt_hash[hash]) {
500                                                 hoff = 1;
501                                                 hash++;
502                                         } else {
503                                                 hoff++;
504                                         }
505
506                                         break;
507                                 }
508
509                                 skip--;
510                                 p = lp->lpni_hashlist.next;
511                         }
512
513                         if (peer != NULL)
514                                 break;
515
516                         p = NULL;
517                         hoff = 1;
518                         hash++;
519                 }
520
521                 if (peer != NULL) {
522                         lnet_nid_t nid = peer->lpni_nid;
523                         int nrefs = atomic_read(&peer->lpni_refcount);
524                         time64_t lastalive = -1;
525                         char *aliveness = "NA";
526                         int maxcr = (peer->lpni_net) ?
527                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
528                         int txcr = peer->lpni_txcredits;
529                         int mintxcr = peer->lpni_mintxcredits;
530                         int rtrcr = peer->lpni_rtrcredits;
531                         int minrtrcr = peer->lpni_minrtrcredits;
532                         int txqnob = peer->lpni_txqnob;
533
534                         if (lnet_isrouter(peer) ||
535                             lnet_peer_aliveness_enabled(peer))
536                                 aliveness = peer->lpni_alive ? "up" : "down";
537
538                         if (lnet_peer_aliveness_enabled(peer)) {
539                                 time64_t now = ktime_get_seconds();
540
541                                 lastalive = now - peer->lpni_last_alive;
542
543                                 /* No need to mess up peers contents with
544                                  * arbitrarily long integers - it suffices to
545                                  * know that lastalive is more than 10000s old
546                                  */
547                                 if (lastalive >= 10000)
548                                         lastalive = 9999;
549                         }
550
551                         lnet_net_unlock(cpt);
552
553                         s += snprintf(s, tmpstr + tmpsiz - s,
554                                       "%-24s %4d %5s %5lld %5d %5d %5d %5d %5d %d\n",
555                                       libcfs_nid2str(nid), nrefs, aliveness,
556                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
557                                       mintxcr, txqnob);
558                         LASSERT(tmpstr + tmpsiz - s > 0);
559
560                 } else { /* peer is NULL */
561                         lnet_net_unlock(cpt);
562                 }
563
564                 if (hash == LNET_PEER_HASH_SIZE) {
565                         cpt++;
566                         hash = 0;
567                         hoff = 1;
568                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
569                                 goto again;
570                 }
571         }
572
573         len = s - tmpstr;     /* how many bytes was written */
574
575         if (len > *lenp) {    /* linux-supplied buffer is too small */
576                 rc = -EINVAL;
577         } else if (len > 0) { /* wrote something */
578                 if (copy_to_user(buffer, tmpstr, len))
579                         rc = -EFAULT;
580                 else
581                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
582         }
583
584         LIBCFS_FREE(tmpstr, tmpsiz);
585
586         if (rc == 0)
587                 *lenp = len;
588
589         return rc;
590 }
591
592 static int __proc_lnet_buffers(void *data, int write,
593                                loff_t pos, void __user *buffer, int nob)
594 {
595         char            *s;
596         char            *tmpstr;
597         int             tmpsiz;
598         int             idx;
599         int             len;
600         int             rc;
601         int             i;
602
603         LASSERT(!write);
604
605         /* (4 %d) * 4 * LNET_CPT_NUMBER */
606         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
607         LIBCFS_ALLOC(tmpstr, tmpsiz);
608         if (tmpstr == NULL)
609                 return -ENOMEM;
610
611         s = tmpstr; /* points to current position in tmpstr[] */
612
613         s += snprintf(s, tmpstr + tmpsiz - s,
614                       "%5s %5s %7s %7s\n",
615                       "pages", "count", "credits", "min");
616         LASSERT(tmpstr + tmpsiz - s > 0);
617
618         if (the_lnet.ln_rtrpools == NULL)
619                 goto out; /* I'm not a router */
620
621         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
622                 struct lnet_rtrbufpool *rbp;
623
624                 lnet_net_lock(LNET_LOCK_EX);
625                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
626                         s += snprintf(s, tmpstr + tmpsiz - s,
627                                       "%5d %5d %7d %7d\n",
628                                       rbp[idx].rbp_npages,
629                                       rbp[idx].rbp_nbuffers,
630                                       rbp[idx].rbp_credits,
631                                       rbp[idx].rbp_mincredits);
632                         LASSERT(tmpstr + tmpsiz - s > 0);
633                 }
634                 lnet_net_unlock(LNET_LOCK_EX);
635         }
636
637  out:
638         len = s - tmpstr;
639
640         if (pos >= min_t(int, len, strlen(tmpstr)))
641                 rc = 0;
642         else
643                 rc = cfs_trace_copyout_string(buffer, nob,
644                                               tmpstr + pos, NULL);
645
646         LIBCFS_FREE(tmpstr, tmpsiz);
647         return rc;
648 }
649
650 static int
651 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
652                   size_t *lenp, loff_t *ppos)
653 {
654         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
655                                     __proc_lnet_buffers);
656 }
657
658 static int
659 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
660               size_t *lenp, loff_t *ppos)
661 {
662         int     tmpsiz = 128 * LNET_CPT_NUMBER;
663         int     rc = 0;
664         char    *tmpstr;
665         char    *s;
666         int     len;
667
668         if (*lenp == 0)
669                 return 0;
670
671         if (write) {
672                 /* Just reset the min stat. */
673                 struct lnet_ni  *ni;
674                 struct lnet_net *net;
675
676                 lnet_net_lock(0);
677
678                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
679                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
680                                 struct lnet_tx_queue *tq;
681                                 int i;
682                                 int j;
683
684                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
685                                         for (j = 0; ni->ni_cpts != NULL &&
686                                              j < ni->ni_ncpts; j++) {
687                                                 if (i == ni->ni_cpts[j])
688                                                         break;
689                                         }
690
691                                         if (j == ni->ni_ncpts)
692                                                 continue;
693
694                                         if (i != 0)
695                                                 lnet_net_lock(i);
696                                         tq->tq_credits_min = tq->tq_credits;
697                                         if (i != 0)
698                                                 lnet_net_unlock(i);
699                                 }
700                         }
701                 }
702                 lnet_net_unlock(0);
703                 *ppos += *lenp;
704                 return 0;
705         }
706
707         LIBCFS_ALLOC(tmpstr, tmpsiz);
708         if (tmpstr == NULL)
709                 return -ENOMEM;
710
711         s = tmpstr; /* points to current position in tmpstr[] */
712
713         if (*ppos == 0) {
714                 s += snprintf(s, tmpstr + tmpsiz - s,
715                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
716                               "nid", "status", "alive", "refs", "peer",
717                               "rtr", "max", "tx", "min");
718                 LASSERT (tmpstr + tmpsiz - s > 0);
719         } else {
720                 struct lnet_ni *ni   = NULL;
721                 int skip = *ppos - 1;
722
723                 lnet_net_lock(0);
724
725                 ni = lnet_get_ni_idx_locked(skip);
726
727                 if (ni != NULL) {
728                         struct lnet_tx_queue *tq;
729                         char *stat;
730                         time64_t now = ktime_get_real_seconds();
731                         time64_t last_alive = -1;
732                         int i;
733                         int j;
734
735                         if (the_lnet.ln_routing)
736                                 last_alive = now - ni->ni_last_alive;
737
738                         /* @lo forever alive */
739                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
740                                 last_alive = 0;
741
742                         lnet_ni_lock(ni);
743                         LASSERT(ni->ni_status != NULL);
744                         stat = (ni->ni_status->ns_status ==
745                                 LNET_NI_STATUS_UP) ? "up" : "down";
746                         lnet_ni_unlock(ni);
747
748                         /* we actually output credits information for
749                          * TX queue of each partition */
750                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
751                                 for (j = 0; ni->ni_cpts != NULL &&
752                                      j < ni->ni_ncpts; j++) {
753                                         if (i == ni->ni_cpts[j])
754                                                 break;
755                                 }
756
757                                 if (j == ni->ni_ncpts)
758                                         continue;
759
760                                 if (i != 0)
761                                         lnet_net_lock(i);
762
763                                 s += snprintf(s, tmpstr + tmpsiz - s,
764                                       "%-24s %6s %5lld %4d %4d %4d %5d %5d %5d\n",
765                                       libcfs_nid2str(ni->ni_nid), stat,
766                                       last_alive, *ni->ni_refs[i],
767                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
768                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
769                                       tq->tq_credits_max,
770                                       tq->tq_credits, tq->tq_credits_min);
771                                 if (i != 0)
772                                         lnet_net_unlock(i);
773                         }
774                         LASSERT(tmpstr + tmpsiz - s > 0);
775                 }
776
777                 lnet_net_unlock(0);
778         }
779
780         len = s - tmpstr;     /* how many bytes was written */
781
782         if (len > *lenp) {    /* linux-supplied buffer is too small */
783                 rc = -EINVAL;
784         } else if (len > 0) { /* wrote something */
785                 if (copy_to_user(buffer, tmpstr, len))
786                         rc = -EFAULT;
787                 else
788                         *ppos += 1;
789         }
790
791         LIBCFS_FREE(tmpstr, tmpsiz);
792
793         if (rc == 0)
794                 *lenp = len;
795
796         return rc;
797 }
798
799 struct lnet_portal_rotors {
800         int             pr_value;
801         const char      *pr_name;
802         const char      *pr_desc;
803 };
804
805 static struct lnet_portal_rotors        portal_rotors[] = {
806         {
807                 .pr_value = LNET_PTL_ROTOR_OFF,
808                 .pr_name  = "OFF",
809                 .pr_desc  = "Turn off message rotor for wildcard portals"
810         },
811         {
812                 .pr_value = LNET_PTL_ROTOR_ON,
813                 .pr_name  = "ON",
814                 .pr_desc  = "round-robin dispatch all PUT messages for "
815                             "wildcard portals"
816         },
817         {
818                 .pr_value = LNET_PTL_ROTOR_RR_RT,
819                 .pr_name  = "RR_RT",
820                 .pr_desc  = "round-robin dispatch routed PUT message for "
821                             "wildcard portals"
822         },
823         {
824                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
825                 .pr_name  = "HASH_RT",
826                 .pr_desc  = "dispatch routed PUT message by hashing source "
827                             "NID for wildcard portals"
828         },
829         {
830                 .pr_value = -1,
831                 .pr_name  = NULL,
832                 .pr_desc  = NULL
833         },
834 };
835
836 static int __proc_lnet_portal_rotor(void *data, int write,
837                                     loff_t pos, void __user *buffer, int nob)
838 {
839         const int       buf_len = 128;
840         char            *buf;
841         char            *tmp;
842         int             rc;
843         int             i;
844
845         LIBCFS_ALLOC(buf, buf_len);
846         if (buf == NULL)
847                 return -ENOMEM;
848
849         if (!write) {
850                 lnet_res_lock(0);
851
852                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
853                         if (portal_rotors[i].pr_value == portal_rotor)
854                                 break;
855                 }
856
857                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
858                 lnet_res_unlock(0);
859
860                 rc = snprintf(buf, buf_len,
861                               "{\n\tportals: all\n"
862                               "\trotor: %s\n\tdescription: %s\n}",
863                               portal_rotors[i].pr_name,
864                               portal_rotors[i].pr_desc);
865
866                 if (pos >= min_t(int, rc, buf_len)) {
867                         rc = 0;
868                 } else {
869                         rc = cfs_trace_copyout_string(buffer, nob,
870                                         buf + pos, "\n");
871                 }
872                 goto out;
873         }
874
875         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
876         if (rc < 0)
877                 goto out;
878
879         tmp = cfs_trimwhite(buf);
880
881         rc = -EINVAL;
882         lnet_res_lock(0);
883         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
884                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
885                                 strlen(portal_rotors[i].pr_name)) == 0) {
886                         portal_rotor = portal_rotors[i].pr_value;
887                         rc = 0;
888                         break;
889                 }
890         }
891         lnet_res_unlock(0);
892 out:
893         LIBCFS_FREE(buf, buf_len);
894         return rc;
895 }
896
897 static int
898 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
899                        size_t *lenp, loff_t *ppos)
900 {
901         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
902                                     __proc_lnet_portal_rotor);
903 }
904
905
906 static struct ctl_table lnet_table[] = {
907         /*
908          * NB No .strategy entries have been provided since sysctl(8) prefers
909          * to go via /proc for portability.
910          */
911         {
912                 INIT_CTL_NAME
913                 .procname       = "stats",
914                 .mode           = 0644,
915                 .proc_handler   = &proc_lnet_stats,
916         },
917         {
918                 INIT_CTL_NAME
919                 .procname       = "routes",
920                 .mode           = 0444,
921                 .proc_handler   = &proc_lnet_routes,
922         },
923         {
924                 INIT_CTL_NAME
925                 .procname       = "routers",
926                 .mode           = 0444,
927                 .proc_handler   = &proc_lnet_routers,
928         },
929         {
930                 INIT_CTL_NAME
931                 .procname       = "peers",
932                 .mode           = 0644,
933                 .proc_handler   = &proc_lnet_peers,
934         },
935         {
936                 INIT_CTL_NAME
937                 .procname       = "buffers",
938                 .mode           = 0444,
939                 .proc_handler   = &proc_lnet_buffers,
940         },
941         {
942                 INIT_CTL_NAME
943                 .procname       = "nis",
944                 .mode           = 0644,
945                 .proc_handler   = &proc_lnet_nis,
946         },
947         {
948                 INIT_CTL_NAME
949                 .procname       = "portal_rotor",
950                 .mode           = 0644,
951                 .proc_handler   = &proc_lnet_portal_rotor,
952         },
953         { .procname = NULL }
954 };
955
956 void lnet_router_debugfs_init(void)
957 {
958         lnet_insert_debugfs(lnet_table, NULL);
959 }