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libceph: ceph_osds, ceph_pg_to_up_acting_osds()
[mirror_ubuntu-bionic-kernel.git] / net / ceph / osdmap.c
1
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/module.h>
5 #include <linux/slab.h>
6 #include <asm/div64.h>
7
8 #include <linux/ceph/libceph.h>
9 #include <linux/ceph/osdmap.h>
10 #include <linux/ceph/decode.h>
11 #include <linux/crush/hash.h>
12 #include <linux/crush/mapper.h>
13
14 char *ceph_osdmap_state_str(char *str, int len, int state)
15 {
16 if (!len)
17 return str;
18
19 if ((state & CEPH_OSD_EXISTS) && (state & CEPH_OSD_UP))
20 snprintf(str, len, "exists, up");
21 else if (state & CEPH_OSD_EXISTS)
22 snprintf(str, len, "exists");
23 else if (state & CEPH_OSD_UP)
24 snprintf(str, len, "up");
25 else
26 snprintf(str, len, "doesn't exist");
27
28 return str;
29 }
30
31 /* maps */
32
33 static int calc_bits_of(unsigned int t)
34 {
35 int b = 0;
36 while (t) {
37 t = t >> 1;
38 b++;
39 }
40 return b;
41 }
42
43 /*
44 * the foo_mask is the smallest value 2^n-1 that is >= foo.
45 */
46 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
47 {
48 pi->pg_num_mask = (1 << calc_bits_of(pi->pg_num-1)) - 1;
49 pi->pgp_num_mask = (1 << calc_bits_of(pi->pgp_num-1)) - 1;
50 }
51
52 /*
53 * decode crush map
54 */
55 static int crush_decode_uniform_bucket(void **p, void *end,
56 struct crush_bucket_uniform *b)
57 {
58 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
59 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
60 b->item_weight = ceph_decode_32(p);
61 return 0;
62 bad:
63 return -EINVAL;
64 }
65
66 static int crush_decode_list_bucket(void **p, void *end,
67 struct crush_bucket_list *b)
68 {
69 int j;
70 dout("crush_decode_list_bucket %p to %p\n", *p, end);
71 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
72 if (b->item_weights == NULL)
73 return -ENOMEM;
74 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
75 if (b->sum_weights == NULL)
76 return -ENOMEM;
77 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
78 for (j = 0; j < b->h.size; j++) {
79 b->item_weights[j] = ceph_decode_32(p);
80 b->sum_weights[j] = ceph_decode_32(p);
81 }
82 return 0;
83 bad:
84 return -EINVAL;
85 }
86
87 static int crush_decode_tree_bucket(void **p, void *end,
88 struct crush_bucket_tree *b)
89 {
90 int j;
91 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
92 ceph_decode_8_safe(p, end, b->num_nodes, bad);
93 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
94 if (b->node_weights == NULL)
95 return -ENOMEM;
96 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
97 for (j = 0; j < b->num_nodes; j++)
98 b->node_weights[j] = ceph_decode_32(p);
99 return 0;
100 bad:
101 return -EINVAL;
102 }
103
104 static int crush_decode_straw_bucket(void **p, void *end,
105 struct crush_bucket_straw *b)
106 {
107 int j;
108 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
109 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
110 if (b->item_weights == NULL)
111 return -ENOMEM;
112 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
113 if (b->straws == NULL)
114 return -ENOMEM;
115 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
116 for (j = 0; j < b->h.size; j++) {
117 b->item_weights[j] = ceph_decode_32(p);
118 b->straws[j] = ceph_decode_32(p);
119 }
120 return 0;
121 bad:
122 return -EINVAL;
123 }
124
125 static int crush_decode_straw2_bucket(void **p, void *end,
126 struct crush_bucket_straw2 *b)
127 {
128 int j;
129 dout("crush_decode_straw2_bucket %p to %p\n", *p, end);
130 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
131 if (b->item_weights == NULL)
132 return -ENOMEM;
133 ceph_decode_need(p, end, b->h.size * sizeof(u32), bad);
134 for (j = 0; j < b->h.size; j++)
135 b->item_weights[j] = ceph_decode_32(p);
136 return 0;
137 bad:
138 return -EINVAL;
139 }
140
141 static int skip_name_map(void **p, void *end)
142 {
143 int len;
144 ceph_decode_32_safe(p, end, len ,bad);
145 while (len--) {
146 int strlen;
147 *p += sizeof(u32);
148 ceph_decode_32_safe(p, end, strlen, bad);
149 *p += strlen;
150 }
151 return 0;
152 bad:
153 return -EINVAL;
154 }
155
156 static struct crush_map *crush_decode(void *pbyval, void *end)
157 {
158 struct crush_map *c;
159 int err = -EINVAL;
160 int i, j;
161 void **p = &pbyval;
162 void *start = pbyval;
163 u32 magic;
164 u32 num_name_maps;
165
166 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
167
168 c = kzalloc(sizeof(*c), GFP_NOFS);
169 if (c == NULL)
170 return ERR_PTR(-ENOMEM);
171
172 /* set tunables to default values */
173 c->choose_local_tries = 2;
174 c->choose_local_fallback_tries = 5;
175 c->choose_total_tries = 19;
176 c->chooseleaf_descend_once = 0;
177
178 ceph_decode_need(p, end, 4*sizeof(u32), bad);
179 magic = ceph_decode_32(p);
180 if (magic != CRUSH_MAGIC) {
181 pr_err("crush_decode magic %x != current %x\n",
182 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
183 goto bad;
184 }
185 c->max_buckets = ceph_decode_32(p);
186 c->max_rules = ceph_decode_32(p);
187 c->max_devices = ceph_decode_32(p);
188
189 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
190 if (c->buckets == NULL)
191 goto badmem;
192 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
193 if (c->rules == NULL)
194 goto badmem;
195
196 /* buckets */
197 for (i = 0; i < c->max_buckets; i++) {
198 int size = 0;
199 u32 alg;
200 struct crush_bucket *b;
201
202 ceph_decode_32_safe(p, end, alg, bad);
203 if (alg == 0) {
204 c->buckets[i] = NULL;
205 continue;
206 }
207 dout("crush_decode bucket %d off %x %p to %p\n",
208 i, (int)(*p-start), *p, end);
209
210 switch (alg) {
211 case CRUSH_BUCKET_UNIFORM:
212 size = sizeof(struct crush_bucket_uniform);
213 break;
214 case CRUSH_BUCKET_LIST:
215 size = sizeof(struct crush_bucket_list);
216 break;
217 case CRUSH_BUCKET_TREE:
218 size = sizeof(struct crush_bucket_tree);
219 break;
220 case CRUSH_BUCKET_STRAW:
221 size = sizeof(struct crush_bucket_straw);
222 break;
223 case CRUSH_BUCKET_STRAW2:
224 size = sizeof(struct crush_bucket_straw2);
225 break;
226 default:
227 err = -EINVAL;
228 goto bad;
229 }
230 BUG_ON(size == 0);
231 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
232 if (b == NULL)
233 goto badmem;
234
235 ceph_decode_need(p, end, 4*sizeof(u32), bad);
236 b->id = ceph_decode_32(p);
237 b->type = ceph_decode_16(p);
238 b->alg = ceph_decode_8(p);
239 b->hash = ceph_decode_8(p);
240 b->weight = ceph_decode_32(p);
241 b->size = ceph_decode_32(p);
242
243 dout("crush_decode bucket size %d off %x %p to %p\n",
244 b->size, (int)(*p-start), *p, end);
245
246 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
247 if (b->items == NULL)
248 goto badmem;
249 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
250 if (b->perm == NULL)
251 goto badmem;
252 b->perm_n = 0;
253
254 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
255 for (j = 0; j < b->size; j++)
256 b->items[j] = ceph_decode_32(p);
257
258 switch (b->alg) {
259 case CRUSH_BUCKET_UNIFORM:
260 err = crush_decode_uniform_bucket(p, end,
261 (struct crush_bucket_uniform *)b);
262 if (err < 0)
263 goto bad;
264 break;
265 case CRUSH_BUCKET_LIST:
266 err = crush_decode_list_bucket(p, end,
267 (struct crush_bucket_list *)b);
268 if (err < 0)
269 goto bad;
270 break;
271 case CRUSH_BUCKET_TREE:
272 err = crush_decode_tree_bucket(p, end,
273 (struct crush_bucket_tree *)b);
274 if (err < 0)
275 goto bad;
276 break;
277 case CRUSH_BUCKET_STRAW:
278 err = crush_decode_straw_bucket(p, end,
279 (struct crush_bucket_straw *)b);
280 if (err < 0)
281 goto bad;
282 break;
283 case CRUSH_BUCKET_STRAW2:
284 err = crush_decode_straw2_bucket(p, end,
285 (struct crush_bucket_straw2 *)b);
286 if (err < 0)
287 goto bad;
288 break;
289 }
290 }
291
292 /* rules */
293 dout("rule vec is %p\n", c->rules);
294 for (i = 0; i < c->max_rules; i++) {
295 u32 yes;
296 struct crush_rule *r;
297
298 ceph_decode_32_safe(p, end, yes, bad);
299 if (!yes) {
300 dout("crush_decode NO rule %d off %x %p to %p\n",
301 i, (int)(*p-start), *p, end);
302 c->rules[i] = NULL;
303 continue;
304 }
305
306 dout("crush_decode rule %d off %x %p to %p\n",
307 i, (int)(*p-start), *p, end);
308
309 /* len */
310 ceph_decode_32_safe(p, end, yes, bad);
311 #if BITS_PER_LONG == 32
312 err = -EINVAL;
313 if (yes > (ULONG_MAX - sizeof(*r))
314 / sizeof(struct crush_rule_step))
315 goto bad;
316 #endif
317 r = c->rules[i] = kmalloc(sizeof(*r) +
318 yes*sizeof(struct crush_rule_step),
319 GFP_NOFS);
320 if (r == NULL)
321 goto badmem;
322 dout(" rule %d is at %p\n", i, r);
323 r->len = yes;
324 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
325 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
326 for (j = 0; j < r->len; j++) {
327 r->steps[j].op = ceph_decode_32(p);
328 r->steps[j].arg1 = ceph_decode_32(p);
329 r->steps[j].arg2 = ceph_decode_32(p);
330 }
331 }
332
333 /* ignore trailing name maps. */
334 for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) {
335 err = skip_name_map(p, end);
336 if (err < 0)
337 goto done;
338 }
339
340 /* tunables */
341 ceph_decode_need(p, end, 3*sizeof(u32), done);
342 c->choose_local_tries = ceph_decode_32(p);
343 c->choose_local_fallback_tries = ceph_decode_32(p);
344 c->choose_total_tries = ceph_decode_32(p);
345 dout("crush decode tunable choose_local_tries = %d\n",
346 c->choose_local_tries);
347 dout("crush decode tunable choose_local_fallback_tries = %d\n",
348 c->choose_local_fallback_tries);
349 dout("crush decode tunable choose_total_tries = %d\n",
350 c->choose_total_tries);
351
352 ceph_decode_need(p, end, sizeof(u32), done);
353 c->chooseleaf_descend_once = ceph_decode_32(p);
354 dout("crush decode tunable chooseleaf_descend_once = %d\n",
355 c->chooseleaf_descend_once);
356
357 ceph_decode_need(p, end, sizeof(u8), done);
358 c->chooseleaf_vary_r = ceph_decode_8(p);
359 dout("crush decode tunable chooseleaf_vary_r = %d\n",
360 c->chooseleaf_vary_r);
361
362 /* skip straw_calc_version, allowed_bucket_algs */
363 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
364 *p += sizeof(u8) + sizeof(u32);
365
366 ceph_decode_need(p, end, sizeof(u8), done);
367 c->chooseleaf_stable = ceph_decode_8(p);
368 dout("crush decode tunable chooseleaf_stable = %d\n",
369 c->chooseleaf_stable);
370
371 done:
372 dout("crush_decode success\n");
373 return c;
374
375 badmem:
376 err = -ENOMEM;
377 bad:
378 dout("crush_decode fail %d\n", err);
379 crush_destroy(c);
380 return ERR_PTR(err);
381 }
382
383 /*
384 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
385 * to a set of osds) and primary_temp (explicit primary setting)
386 */
387 static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
388 {
389 if (l.pool < r.pool)
390 return -1;
391 if (l.pool > r.pool)
392 return 1;
393 if (l.seed < r.seed)
394 return -1;
395 if (l.seed > r.seed)
396 return 1;
397 return 0;
398 }
399
400 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
401 struct rb_root *root)
402 {
403 struct rb_node **p = &root->rb_node;
404 struct rb_node *parent = NULL;
405 struct ceph_pg_mapping *pg = NULL;
406 int c;
407
408 dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
409 while (*p) {
410 parent = *p;
411 pg = rb_entry(parent, struct ceph_pg_mapping, node);
412 c = pgid_cmp(new->pgid, pg->pgid);
413 if (c < 0)
414 p = &(*p)->rb_left;
415 else if (c > 0)
416 p = &(*p)->rb_right;
417 else
418 return -EEXIST;
419 }
420
421 rb_link_node(&new->node, parent, p);
422 rb_insert_color(&new->node, root);
423 return 0;
424 }
425
426 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
427 struct ceph_pg pgid)
428 {
429 struct rb_node *n = root->rb_node;
430 struct ceph_pg_mapping *pg;
431 int c;
432
433 while (n) {
434 pg = rb_entry(n, struct ceph_pg_mapping, node);
435 c = pgid_cmp(pgid, pg->pgid);
436 if (c < 0) {
437 n = n->rb_left;
438 } else if (c > 0) {
439 n = n->rb_right;
440 } else {
441 dout("__lookup_pg_mapping %lld.%x got %p\n",
442 pgid.pool, pgid.seed, pg);
443 return pg;
444 }
445 }
446 return NULL;
447 }
448
449 static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
450 {
451 struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
452
453 if (pg) {
454 dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
455 pg);
456 rb_erase(&pg->node, root);
457 kfree(pg);
458 return 0;
459 }
460 dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
461 return -ENOENT;
462 }
463
464 /*
465 * rbtree of pg pool info
466 */
467 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
468 {
469 struct rb_node **p = &root->rb_node;
470 struct rb_node *parent = NULL;
471 struct ceph_pg_pool_info *pi = NULL;
472
473 while (*p) {
474 parent = *p;
475 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
476 if (new->id < pi->id)
477 p = &(*p)->rb_left;
478 else if (new->id > pi->id)
479 p = &(*p)->rb_right;
480 else
481 return -EEXIST;
482 }
483
484 rb_link_node(&new->node, parent, p);
485 rb_insert_color(&new->node, root);
486 return 0;
487 }
488
489 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
490 {
491 struct ceph_pg_pool_info *pi;
492 struct rb_node *n = root->rb_node;
493
494 while (n) {
495 pi = rb_entry(n, struct ceph_pg_pool_info, node);
496 if (id < pi->id)
497 n = n->rb_left;
498 else if (id > pi->id)
499 n = n->rb_right;
500 else
501 return pi;
502 }
503 return NULL;
504 }
505
506 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
507 {
508 return __lookup_pg_pool(&map->pg_pools, id);
509 }
510
511 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
512 {
513 struct ceph_pg_pool_info *pi;
514
515 if (id == CEPH_NOPOOL)
516 return NULL;
517
518 if (WARN_ON_ONCE(id > (u64) INT_MAX))
519 return NULL;
520
521 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
522
523 return pi ? pi->name : NULL;
524 }
525 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
526
527 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
528 {
529 struct rb_node *rbp;
530
531 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
532 struct ceph_pg_pool_info *pi =
533 rb_entry(rbp, struct ceph_pg_pool_info, node);
534 if (pi->name && strcmp(pi->name, name) == 0)
535 return pi->id;
536 }
537 return -ENOENT;
538 }
539 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
540
541 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
542 {
543 rb_erase(&pi->node, root);
544 kfree(pi->name);
545 kfree(pi);
546 }
547
548 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
549 {
550 u8 ev, cv;
551 unsigned len, num;
552 void *pool_end;
553
554 ceph_decode_need(p, end, 2 + 4, bad);
555 ev = ceph_decode_8(p); /* encoding version */
556 cv = ceph_decode_8(p); /* compat version */
557 if (ev < 5) {
558 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
559 return -EINVAL;
560 }
561 if (cv > 9) {
562 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
563 return -EINVAL;
564 }
565 len = ceph_decode_32(p);
566 ceph_decode_need(p, end, len, bad);
567 pool_end = *p + len;
568
569 pi->type = ceph_decode_8(p);
570 pi->size = ceph_decode_8(p);
571 pi->crush_ruleset = ceph_decode_8(p);
572 pi->object_hash = ceph_decode_8(p);
573
574 pi->pg_num = ceph_decode_32(p);
575 pi->pgp_num = ceph_decode_32(p);
576
577 *p += 4 + 4; /* skip lpg* */
578 *p += 4; /* skip last_change */
579 *p += 8 + 4; /* skip snap_seq, snap_epoch */
580
581 /* skip snaps */
582 num = ceph_decode_32(p);
583 while (num--) {
584 *p += 8; /* snapid key */
585 *p += 1 + 1; /* versions */
586 len = ceph_decode_32(p);
587 *p += len;
588 }
589
590 /* skip removed_snaps */
591 num = ceph_decode_32(p);
592 *p += num * (8 + 8);
593
594 *p += 8; /* skip auid */
595 pi->flags = ceph_decode_64(p);
596 *p += 4; /* skip crash_replay_interval */
597
598 if (ev >= 7)
599 *p += 1; /* skip min_size */
600
601 if (ev >= 8)
602 *p += 8 + 8; /* skip quota_max_* */
603
604 if (ev >= 9) {
605 /* skip tiers */
606 num = ceph_decode_32(p);
607 *p += num * 8;
608
609 *p += 8; /* skip tier_of */
610 *p += 1; /* skip cache_mode */
611
612 pi->read_tier = ceph_decode_64(p);
613 pi->write_tier = ceph_decode_64(p);
614 } else {
615 pi->read_tier = -1;
616 pi->write_tier = -1;
617 }
618
619 /* ignore the rest */
620
621 *p = pool_end;
622 calc_pg_masks(pi);
623 return 0;
624
625 bad:
626 return -EINVAL;
627 }
628
629 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
630 {
631 struct ceph_pg_pool_info *pi;
632 u32 num, len;
633 u64 pool;
634
635 ceph_decode_32_safe(p, end, num, bad);
636 dout(" %d pool names\n", num);
637 while (num--) {
638 ceph_decode_64_safe(p, end, pool, bad);
639 ceph_decode_32_safe(p, end, len, bad);
640 dout(" pool %llu len %d\n", pool, len);
641 ceph_decode_need(p, end, len, bad);
642 pi = __lookup_pg_pool(&map->pg_pools, pool);
643 if (pi) {
644 char *name = kstrndup(*p, len, GFP_NOFS);
645
646 if (!name)
647 return -ENOMEM;
648 kfree(pi->name);
649 pi->name = name;
650 dout(" name is %s\n", pi->name);
651 }
652 *p += len;
653 }
654 return 0;
655
656 bad:
657 return -EINVAL;
658 }
659
660 /*
661 * osd map
662 */
663 void ceph_osdmap_destroy(struct ceph_osdmap *map)
664 {
665 dout("osdmap_destroy %p\n", map);
666 if (map->crush)
667 crush_destroy(map->crush);
668 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
669 struct ceph_pg_mapping *pg =
670 rb_entry(rb_first(&map->pg_temp),
671 struct ceph_pg_mapping, node);
672 rb_erase(&pg->node, &map->pg_temp);
673 kfree(pg);
674 }
675 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
676 struct ceph_pg_mapping *pg =
677 rb_entry(rb_first(&map->primary_temp),
678 struct ceph_pg_mapping, node);
679 rb_erase(&pg->node, &map->primary_temp);
680 kfree(pg);
681 }
682 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
683 struct ceph_pg_pool_info *pi =
684 rb_entry(rb_first(&map->pg_pools),
685 struct ceph_pg_pool_info, node);
686 __remove_pg_pool(&map->pg_pools, pi);
687 }
688 kfree(map->osd_state);
689 kfree(map->osd_weight);
690 kfree(map->osd_addr);
691 kfree(map->osd_primary_affinity);
692 kfree(map);
693 }
694
695 /*
696 * Adjust max_osd value, (re)allocate arrays.
697 *
698 * The new elements are properly initialized.
699 */
700 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
701 {
702 u8 *state;
703 u32 *weight;
704 struct ceph_entity_addr *addr;
705 int i;
706
707 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
708 if (!state)
709 return -ENOMEM;
710 map->osd_state = state;
711
712 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
713 if (!weight)
714 return -ENOMEM;
715 map->osd_weight = weight;
716
717 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
718 if (!addr)
719 return -ENOMEM;
720 map->osd_addr = addr;
721
722 for (i = map->max_osd; i < max; i++) {
723 map->osd_state[i] = 0;
724 map->osd_weight[i] = CEPH_OSD_OUT;
725 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
726 }
727
728 if (map->osd_primary_affinity) {
729 u32 *affinity;
730
731 affinity = krealloc(map->osd_primary_affinity,
732 max*sizeof(*affinity), GFP_NOFS);
733 if (!affinity)
734 return -ENOMEM;
735 map->osd_primary_affinity = affinity;
736
737 for (i = map->max_osd; i < max; i++)
738 map->osd_primary_affinity[i] =
739 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
740 }
741
742 map->max_osd = max;
743
744 return 0;
745 }
746
747 #define OSDMAP_WRAPPER_COMPAT_VER 7
748 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
749
750 /*
751 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
752 * to struct_v of the client_data section for new (v7 and above)
753 * osdmaps.
754 */
755 static int get_osdmap_client_data_v(void **p, void *end,
756 const char *prefix, u8 *v)
757 {
758 u8 struct_v;
759
760 ceph_decode_8_safe(p, end, struct_v, e_inval);
761 if (struct_v >= 7) {
762 u8 struct_compat;
763
764 ceph_decode_8_safe(p, end, struct_compat, e_inval);
765 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
766 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
767 struct_v, struct_compat,
768 OSDMAP_WRAPPER_COMPAT_VER, prefix);
769 return -EINVAL;
770 }
771 *p += 4; /* ignore wrapper struct_len */
772
773 ceph_decode_8_safe(p, end, struct_v, e_inval);
774 ceph_decode_8_safe(p, end, struct_compat, e_inval);
775 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
776 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
777 struct_v, struct_compat,
778 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
779 return -EINVAL;
780 }
781 *p += 4; /* ignore client data struct_len */
782 } else {
783 u16 version;
784
785 *p -= 1;
786 ceph_decode_16_safe(p, end, version, e_inval);
787 if (version < 6) {
788 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
789 version, prefix);
790 return -EINVAL;
791 }
792
793 /* old osdmap enconding */
794 struct_v = 0;
795 }
796
797 *v = struct_v;
798 return 0;
799
800 e_inval:
801 return -EINVAL;
802 }
803
804 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
805 bool incremental)
806 {
807 u32 n;
808
809 ceph_decode_32_safe(p, end, n, e_inval);
810 while (n--) {
811 struct ceph_pg_pool_info *pi;
812 u64 pool;
813 int ret;
814
815 ceph_decode_64_safe(p, end, pool, e_inval);
816
817 pi = __lookup_pg_pool(&map->pg_pools, pool);
818 if (!incremental || !pi) {
819 pi = kzalloc(sizeof(*pi), GFP_NOFS);
820 if (!pi)
821 return -ENOMEM;
822
823 pi->id = pool;
824
825 ret = __insert_pg_pool(&map->pg_pools, pi);
826 if (ret) {
827 kfree(pi);
828 return ret;
829 }
830 }
831
832 ret = decode_pool(p, end, pi);
833 if (ret)
834 return ret;
835 }
836
837 return 0;
838
839 e_inval:
840 return -EINVAL;
841 }
842
843 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
844 {
845 return __decode_pools(p, end, map, false);
846 }
847
848 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
849 {
850 return __decode_pools(p, end, map, true);
851 }
852
853 static int __decode_pg_temp(void **p, void *end, struct ceph_osdmap *map,
854 bool incremental)
855 {
856 u32 n;
857
858 ceph_decode_32_safe(p, end, n, e_inval);
859 while (n--) {
860 struct ceph_pg pgid;
861 u32 len, i;
862 int ret;
863
864 ret = ceph_decode_pgid(p, end, &pgid);
865 if (ret)
866 return ret;
867
868 ceph_decode_32_safe(p, end, len, e_inval);
869
870 ret = __remove_pg_mapping(&map->pg_temp, pgid);
871 BUG_ON(!incremental && ret != -ENOENT);
872
873 if (!incremental || len > 0) {
874 struct ceph_pg_mapping *pg;
875
876 ceph_decode_need(p, end, len*sizeof(u32), e_inval);
877
878 if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
879 return -EINVAL;
880
881 pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
882 if (!pg)
883 return -ENOMEM;
884
885 pg->pgid = pgid;
886 pg->pg_temp.len = len;
887 for (i = 0; i < len; i++)
888 pg->pg_temp.osds[i] = ceph_decode_32(p);
889
890 ret = __insert_pg_mapping(pg, &map->pg_temp);
891 if (ret) {
892 kfree(pg);
893 return ret;
894 }
895 }
896 }
897
898 return 0;
899
900 e_inval:
901 return -EINVAL;
902 }
903
904 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
905 {
906 return __decode_pg_temp(p, end, map, false);
907 }
908
909 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
910 {
911 return __decode_pg_temp(p, end, map, true);
912 }
913
914 static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
915 bool incremental)
916 {
917 u32 n;
918
919 ceph_decode_32_safe(p, end, n, e_inval);
920 while (n--) {
921 struct ceph_pg pgid;
922 u32 osd;
923 int ret;
924
925 ret = ceph_decode_pgid(p, end, &pgid);
926 if (ret)
927 return ret;
928
929 ceph_decode_32_safe(p, end, osd, e_inval);
930
931 ret = __remove_pg_mapping(&map->primary_temp, pgid);
932 BUG_ON(!incremental && ret != -ENOENT);
933
934 if (!incremental || osd != (u32)-1) {
935 struct ceph_pg_mapping *pg;
936
937 pg = kzalloc(sizeof(*pg), GFP_NOFS);
938 if (!pg)
939 return -ENOMEM;
940
941 pg->pgid = pgid;
942 pg->primary_temp.osd = osd;
943
944 ret = __insert_pg_mapping(pg, &map->primary_temp);
945 if (ret) {
946 kfree(pg);
947 return ret;
948 }
949 }
950 }
951
952 return 0;
953
954 e_inval:
955 return -EINVAL;
956 }
957
958 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
959 {
960 return __decode_primary_temp(p, end, map, false);
961 }
962
963 static int decode_new_primary_temp(void **p, void *end,
964 struct ceph_osdmap *map)
965 {
966 return __decode_primary_temp(p, end, map, true);
967 }
968
969 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
970 {
971 BUG_ON(osd >= map->max_osd);
972
973 if (!map->osd_primary_affinity)
974 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
975
976 return map->osd_primary_affinity[osd];
977 }
978
979 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
980 {
981 BUG_ON(osd >= map->max_osd);
982
983 if (!map->osd_primary_affinity) {
984 int i;
985
986 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
987 GFP_NOFS);
988 if (!map->osd_primary_affinity)
989 return -ENOMEM;
990
991 for (i = 0; i < map->max_osd; i++)
992 map->osd_primary_affinity[i] =
993 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
994 }
995
996 map->osd_primary_affinity[osd] = aff;
997
998 return 0;
999 }
1000
1001 static int decode_primary_affinity(void **p, void *end,
1002 struct ceph_osdmap *map)
1003 {
1004 u32 len, i;
1005
1006 ceph_decode_32_safe(p, end, len, e_inval);
1007 if (len == 0) {
1008 kfree(map->osd_primary_affinity);
1009 map->osd_primary_affinity = NULL;
1010 return 0;
1011 }
1012 if (len != map->max_osd)
1013 goto e_inval;
1014
1015 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1016
1017 for (i = 0; i < map->max_osd; i++) {
1018 int ret;
1019
1020 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1021 if (ret)
1022 return ret;
1023 }
1024
1025 return 0;
1026
1027 e_inval:
1028 return -EINVAL;
1029 }
1030
1031 static int decode_new_primary_affinity(void **p, void *end,
1032 struct ceph_osdmap *map)
1033 {
1034 u32 n;
1035
1036 ceph_decode_32_safe(p, end, n, e_inval);
1037 while (n--) {
1038 u32 osd, aff;
1039 int ret;
1040
1041 ceph_decode_32_safe(p, end, osd, e_inval);
1042 ceph_decode_32_safe(p, end, aff, e_inval);
1043
1044 ret = set_primary_affinity(map, osd, aff);
1045 if (ret)
1046 return ret;
1047
1048 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1049 }
1050
1051 return 0;
1052
1053 e_inval:
1054 return -EINVAL;
1055 }
1056
1057 /*
1058 * decode a full map.
1059 */
1060 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1061 {
1062 u8 struct_v;
1063 u32 epoch = 0;
1064 void *start = *p;
1065 u32 max;
1066 u32 len, i;
1067 int err;
1068
1069 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1070
1071 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1072 if (err)
1073 goto bad;
1074
1075 /* fsid, epoch, created, modified */
1076 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1077 sizeof(map->created) + sizeof(map->modified), e_inval);
1078 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1079 epoch = map->epoch = ceph_decode_32(p);
1080 ceph_decode_copy(p, &map->created, sizeof(map->created));
1081 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1082
1083 /* pools */
1084 err = decode_pools(p, end, map);
1085 if (err)
1086 goto bad;
1087
1088 /* pool_name */
1089 err = decode_pool_names(p, end, map);
1090 if (err)
1091 goto bad;
1092
1093 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1094
1095 ceph_decode_32_safe(p, end, map->flags, e_inval);
1096
1097 /* max_osd */
1098 ceph_decode_32_safe(p, end, max, e_inval);
1099
1100 /* (re)alloc osd arrays */
1101 err = osdmap_set_max_osd(map, max);
1102 if (err)
1103 goto bad;
1104
1105 /* osd_state, osd_weight, osd_addrs->client_addr */
1106 ceph_decode_need(p, end, 3*sizeof(u32) +
1107 map->max_osd*(1 + sizeof(*map->osd_weight) +
1108 sizeof(*map->osd_addr)), e_inval);
1109
1110 if (ceph_decode_32(p) != map->max_osd)
1111 goto e_inval;
1112
1113 ceph_decode_copy(p, map->osd_state, map->max_osd);
1114
1115 if (ceph_decode_32(p) != map->max_osd)
1116 goto e_inval;
1117
1118 for (i = 0; i < map->max_osd; i++)
1119 map->osd_weight[i] = ceph_decode_32(p);
1120
1121 if (ceph_decode_32(p) != map->max_osd)
1122 goto e_inval;
1123
1124 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1125 for (i = 0; i < map->max_osd; i++)
1126 ceph_decode_addr(&map->osd_addr[i]);
1127
1128 /* pg_temp */
1129 err = decode_pg_temp(p, end, map);
1130 if (err)
1131 goto bad;
1132
1133 /* primary_temp */
1134 if (struct_v >= 1) {
1135 err = decode_primary_temp(p, end, map);
1136 if (err)
1137 goto bad;
1138 }
1139
1140 /* primary_affinity */
1141 if (struct_v >= 2) {
1142 err = decode_primary_affinity(p, end, map);
1143 if (err)
1144 goto bad;
1145 } else {
1146 /* XXX can this happen? */
1147 kfree(map->osd_primary_affinity);
1148 map->osd_primary_affinity = NULL;
1149 }
1150
1151 /* crush */
1152 ceph_decode_32_safe(p, end, len, e_inval);
1153 map->crush = crush_decode(*p, min(*p + len, end));
1154 if (IS_ERR(map->crush)) {
1155 err = PTR_ERR(map->crush);
1156 map->crush = NULL;
1157 goto bad;
1158 }
1159 *p += len;
1160
1161 /* ignore the rest */
1162 *p = end;
1163
1164 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1165 return 0;
1166
1167 e_inval:
1168 err = -EINVAL;
1169 bad:
1170 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1171 err, epoch, (int)(*p - start), *p, start, end);
1172 print_hex_dump(KERN_DEBUG, "osdmap: ",
1173 DUMP_PREFIX_OFFSET, 16, 1,
1174 start, end - start, true);
1175 return err;
1176 }
1177
1178 /*
1179 * Allocate and decode a full map.
1180 */
1181 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1182 {
1183 struct ceph_osdmap *map;
1184 int ret;
1185
1186 map = kzalloc(sizeof(*map), GFP_NOFS);
1187 if (!map)
1188 return ERR_PTR(-ENOMEM);
1189
1190 map->pg_temp = RB_ROOT;
1191 map->primary_temp = RB_ROOT;
1192 mutex_init(&map->crush_scratch_mutex);
1193
1194 ret = osdmap_decode(p, end, map);
1195 if (ret) {
1196 ceph_osdmap_destroy(map);
1197 return ERR_PTR(ret);
1198 }
1199
1200 return map;
1201 }
1202
1203 /*
1204 * decode and apply an incremental map update.
1205 */
1206 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1207 struct ceph_osdmap *map)
1208 {
1209 struct crush_map *newcrush = NULL;
1210 struct ceph_fsid fsid;
1211 u32 epoch = 0;
1212 struct ceph_timespec modified;
1213 s32 len;
1214 u64 pool;
1215 __s64 new_pool_max;
1216 __s32 new_flags, max;
1217 void *start = *p;
1218 int err;
1219 u8 struct_v;
1220
1221 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1222
1223 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1224 if (err)
1225 goto bad;
1226
1227 /* fsid, epoch, modified, new_pool_max, new_flags */
1228 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1229 sizeof(u64) + sizeof(u32), e_inval);
1230 ceph_decode_copy(p, &fsid, sizeof(fsid));
1231 epoch = ceph_decode_32(p);
1232 BUG_ON(epoch != map->epoch+1);
1233 ceph_decode_copy(p, &modified, sizeof(modified));
1234 new_pool_max = ceph_decode_64(p);
1235 new_flags = ceph_decode_32(p);
1236
1237 /* full map? */
1238 ceph_decode_32_safe(p, end, len, e_inval);
1239 if (len > 0) {
1240 dout("apply_incremental full map len %d, %p to %p\n",
1241 len, *p, end);
1242 return ceph_osdmap_decode(p, min(*p+len, end));
1243 }
1244
1245 /* new crush? */
1246 ceph_decode_32_safe(p, end, len, e_inval);
1247 if (len > 0) {
1248 newcrush = crush_decode(*p, min(*p+len, end));
1249 if (IS_ERR(newcrush)) {
1250 err = PTR_ERR(newcrush);
1251 newcrush = NULL;
1252 goto bad;
1253 }
1254 *p += len;
1255 }
1256
1257 /* new flags? */
1258 if (new_flags >= 0)
1259 map->flags = new_flags;
1260 if (new_pool_max >= 0)
1261 map->pool_max = new_pool_max;
1262
1263 /* new max? */
1264 ceph_decode_32_safe(p, end, max, e_inval);
1265 if (max >= 0) {
1266 err = osdmap_set_max_osd(map, max);
1267 if (err)
1268 goto bad;
1269 }
1270
1271 map->epoch++;
1272 map->modified = modified;
1273 if (newcrush) {
1274 if (map->crush)
1275 crush_destroy(map->crush);
1276 map->crush = newcrush;
1277 newcrush = NULL;
1278 }
1279
1280 /* new_pools */
1281 err = decode_new_pools(p, end, map);
1282 if (err)
1283 goto bad;
1284
1285 /* new_pool_names */
1286 err = decode_pool_names(p, end, map);
1287 if (err)
1288 goto bad;
1289
1290 /* old_pool */
1291 ceph_decode_32_safe(p, end, len, e_inval);
1292 while (len--) {
1293 struct ceph_pg_pool_info *pi;
1294
1295 ceph_decode_64_safe(p, end, pool, e_inval);
1296 pi = __lookup_pg_pool(&map->pg_pools, pool);
1297 if (pi)
1298 __remove_pg_pool(&map->pg_pools, pi);
1299 }
1300
1301 /* new_up */
1302 ceph_decode_32_safe(p, end, len, e_inval);
1303 while (len--) {
1304 u32 osd;
1305 struct ceph_entity_addr addr;
1306 ceph_decode_32_safe(p, end, osd, e_inval);
1307 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), e_inval);
1308 ceph_decode_addr(&addr);
1309 pr_info("osd%d up\n", osd);
1310 BUG_ON(osd >= map->max_osd);
1311 map->osd_state[osd] |= CEPH_OSD_UP | CEPH_OSD_EXISTS;
1312 map->osd_addr[osd] = addr;
1313 }
1314
1315 /* new_state */
1316 ceph_decode_32_safe(p, end, len, e_inval);
1317 while (len--) {
1318 u32 osd;
1319 u8 xorstate;
1320 ceph_decode_32_safe(p, end, osd, e_inval);
1321 xorstate = **(u8 **)p;
1322 (*p)++; /* clean flag */
1323 if (xorstate == 0)
1324 xorstate = CEPH_OSD_UP;
1325 if (xorstate & CEPH_OSD_UP)
1326 pr_info("osd%d down\n", osd);
1327 if (osd < map->max_osd)
1328 map->osd_state[osd] ^= xorstate;
1329 }
1330
1331 /* new_weight */
1332 ceph_decode_32_safe(p, end, len, e_inval);
1333 while (len--) {
1334 u32 osd, off;
1335 ceph_decode_need(p, end, sizeof(u32)*2, e_inval);
1336 osd = ceph_decode_32(p);
1337 off = ceph_decode_32(p);
1338 pr_info("osd%d weight 0x%x %s\n", osd, off,
1339 off == CEPH_OSD_IN ? "(in)" :
1340 (off == CEPH_OSD_OUT ? "(out)" : ""));
1341 if (osd < map->max_osd)
1342 map->osd_weight[osd] = off;
1343 }
1344
1345 /* new_pg_temp */
1346 err = decode_new_pg_temp(p, end, map);
1347 if (err)
1348 goto bad;
1349
1350 /* new_primary_temp */
1351 if (struct_v >= 1) {
1352 err = decode_new_primary_temp(p, end, map);
1353 if (err)
1354 goto bad;
1355 }
1356
1357 /* new_primary_affinity */
1358 if (struct_v >= 2) {
1359 err = decode_new_primary_affinity(p, end, map);
1360 if (err)
1361 goto bad;
1362 }
1363
1364 /* ignore the rest */
1365 *p = end;
1366
1367 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1368 return map;
1369
1370 e_inval:
1371 err = -EINVAL;
1372 bad:
1373 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1374 err, epoch, (int)(*p - start), *p, start, end);
1375 print_hex_dump(KERN_DEBUG, "osdmap: ",
1376 DUMP_PREFIX_OFFSET, 16, 1,
1377 start, end - start, true);
1378 if (newcrush)
1379 crush_destroy(newcrush);
1380 return ERR_PTR(err);
1381 }
1382
1383 void ceph_oid_copy(struct ceph_object_id *dest,
1384 const struct ceph_object_id *src)
1385 {
1386 WARN_ON(!ceph_oid_empty(dest));
1387
1388 if (src->name != src->inline_name) {
1389 /* very rare, see ceph_object_id definition */
1390 dest->name = kmalloc(src->name_len + 1,
1391 GFP_NOIO | __GFP_NOFAIL);
1392 }
1393
1394 memcpy(dest->name, src->name, src->name_len + 1);
1395 dest->name_len = src->name_len;
1396 }
1397 EXPORT_SYMBOL(ceph_oid_copy);
1398
1399 static __printf(2, 0)
1400 int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1401 {
1402 int len;
1403
1404 WARN_ON(!ceph_oid_empty(oid));
1405
1406 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1407 if (len >= sizeof(oid->inline_name))
1408 return len;
1409
1410 oid->name_len = len;
1411 return 0;
1412 }
1413
1414 /*
1415 * If oid doesn't fit into inline buffer, BUG.
1416 */
1417 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1418 {
1419 va_list ap;
1420
1421 va_start(ap, fmt);
1422 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1423 va_end(ap);
1424 }
1425 EXPORT_SYMBOL(ceph_oid_printf);
1426
1427 static __printf(3, 0)
1428 int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1429 const char *fmt, va_list ap)
1430 {
1431 va_list aq;
1432 int len;
1433
1434 va_copy(aq, ap);
1435 len = oid_printf_vargs(oid, fmt, aq);
1436 va_end(aq);
1437
1438 if (len) {
1439 char *external_name;
1440
1441 external_name = kmalloc(len + 1, gfp);
1442 if (!external_name)
1443 return -ENOMEM;
1444
1445 oid->name = external_name;
1446 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1447 oid->name_len = len;
1448 }
1449
1450 return 0;
1451 }
1452
1453 /*
1454 * If oid doesn't fit into inline buffer, allocate.
1455 */
1456 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1457 const char *fmt, ...)
1458 {
1459 va_list ap;
1460 int ret;
1461
1462 va_start(ap, fmt);
1463 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1464 va_end(ap);
1465
1466 return ret;
1467 }
1468 EXPORT_SYMBOL(ceph_oid_aprintf);
1469
1470 void ceph_oid_destroy(struct ceph_object_id *oid)
1471 {
1472 if (oid->name != oid->inline_name)
1473 kfree(oid->name);
1474 }
1475 EXPORT_SYMBOL(ceph_oid_destroy);
1476
1477 static bool osds_valid(const struct ceph_osds *set)
1478 {
1479 /* non-empty set */
1480 if (set->size > 0 && set->primary >= 0)
1481 return true;
1482
1483 /* empty can_shift_osds set */
1484 if (!set->size && set->primary == -1)
1485 return true;
1486
1487 /* empty !can_shift_osds set - all NONE */
1488 if (set->size > 0 && set->primary == -1) {
1489 int i;
1490
1491 for (i = 0; i < set->size; i++) {
1492 if (set->osds[i] != CRUSH_ITEM_NONE)
1493 break;
1494 }
1495 if (i == set->size)
1496 return true;
1497 }
1498
1499 return false;
1500 }
1501
1502 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
1503 {
1504 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
1505 dest->size = src->size;
1506 dest->primary = src->primary;
1507 }
1508
1509 /*
1510 * calculate file layout from given offset, length.
1511 * fill in correct oid, logical length, and object extent
1512 * offset, length.
1513 *
1514 * for now, we write only a single su, until we can
1515 * pass a stride back to the caller.
1516 */
1517 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
1518 u64 off, u64 len,
1519 u64 *ono,
1520 u64 *oxoff, u64 *oxlen)
1521 {
1522 u32 osize = le32_to_cpu(layout->fl_object_size);
1523 u32 su = le32_to_cpu(layout->fl_stripe_unit);
1524 u32 sc = le32_to_cpu(layout->fl_stripe_count);
1525 u32 bl, stripeno, stripepos, objsetno;
1526 u32 su_per_object;
1527 u64 t, su_offset;
1528
1529 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
1530 osize, su);
1531 if (su == 0 || sc == 0)
1532 goto invalid;
1533 su_per_object = osize / su;
1534 if (su_per_object == 0)
1535 goto invalid;
1536 dout("osize %u / su %u = su_per_object %u\n", osize, su,
1537 su_per_object);
1538
1539 if ((su & ~PAGE_MASK) != 0)
1540 goto invalid;
1541
1542 /* bl = *off / su; */
1543 t = off;
1544 do_div(t, su);
1545 bl = t;
1546 dout("off %llu / su %u = bl %u\n", off, su, bl);
1547
1548 stripeno = bl / sc;
1549 stripepos = bl % sc;
1550 objsetno = stripeno / su_per_object;
1551
1552 *ono = objsetno * sc + stripepos;
1553 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
1554
1555 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
1556 t = off;
1557 su_offset = do_div(t, su);
1558 *oxoff = su_offset + (stripeno % su_per_object) * su;
1559
1560 /*
1561 * Calculate the length of the extent being written to the selected
1562 * object. This is the minimum of the full length requested (len) or
1563 * the remainder of the current stripe being written to.
1564 */
1565 *oxlen = min_t(u64, len, su - su_offset);
1566
1567 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
1568 return 0;
1569
1570 invalid:
1571 dout(" invalid layout\n");
1572 *ono = 0;
1573 *oxoff = 0;
1574 *oxlen = 0;
1575 return -EINVAL;
1576 }
1577 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
1578
1579 /*
1580 * Map an object into a PG.
1581 *
1582 * Should only be called with target_oid and target_oloc (as opposed to
1583 * base_oid and base_oloc), since tiering isn't taken into account.
1584 */
1585 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
1586 struct ceph_object_id *oid,
1587 struct ceph_object_locator *oloc,
1588 struct ceph_pg *raw_pgid)
1589 {
1590 struct ceph_pg_pool_info *pi;
1591
1592 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
1593 if (!pi)
1594 return -ENOENT;
1595
1596 raw_pgid->pool = oloc->pool;
1597 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
1598 oid->name_len);
1599
1600 dout("%s %*pE -> raw_pgid %llu.%x\n", __func__, oid->name_len,
1601 oid->name, raw_pgid->pool, raw_pgid->seed);
1602 return 0;
1603 }
1604 EXPORT_SYMBOL(ceph_object_locator_to_pg);
1605
1606 /*
1607 * Map a raw PG (full precision ps) into an actual PG.
1608 */
1609 static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
1610 const struct ceph_pg *raw_pgid,
1611 struct ceph_pg *pgid)
1612 {
1613 pgid->pool = raw_pgid->pool;
1614 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
1615 pi->pg_num_mask);
1616 }
1617
1618 /*
1619 * Map a raw PG (full precision ps) into a placement ps (placement
1620 * seed). Include pool id in that value so that different pools don't
1621 * use the same seeds.
1622 */
1623 static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
1624 const struct ceph_pg *raw_pgid)
1625 {
1626 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
1627 /* hash pool id and seed so that pool PGs do not overlap */
1628 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
1629 ceph_stable_mod(raw_pgid->seed,
1630 pi->pgp_num,
1631 pi->pgp_num_mask),
1632 raw_pgid->pool);
1633 } else {
1634 /*
1635 * legacy behavior: add ps and pool together. this is
1636 * not a great approach because the PGs from each pool
1637 * will overlap on top of each other: 0.5 == 1.4 ==
1638 * 2.3 == ...
1639 */
1640 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
1641 pi->pgp_num_mask) +
1642 (unsigned)raw_pgid->pool;
1643 }
1644 }
1645
1646 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
1647 int *result, int result_max,
1648 const __u32 *weight, int weight_max)
1649 {
1650 int r;
1651
1652 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
1653
1654 mutex_lock(&map->crush_scratch_mutex);
1655 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
1656 weight, weight_max, map->crush_scratch_ary);
1657 mutex_unlock(&map->crush_scratch_mutex);
1658
1659 return r;
1660 }
1661
1662 /*
1663 * Calculate raw set (CRUSH output) for given PG. The result may
1664 * contain nonexistent OSDs. ->primary is undefined for a raw set.
1665 *
1666 * Placement seed (CRUSH input) is returned through @ppps.
1667 */
1668 static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
1669 struct ceph_pg_pool_info *pi,
1670 const struct ceph_pg *raw_pgid,
1671 struct ceph_osds *raw,
1672 u32 *ppps)
1673 {
1674 u32 pps = raw_pg_to_pps(pi, raw_pgid);
1675 int ruleno;
1676 int len;
1677
1678 ceph_osds_init(raw);
1679 if (ppps)
1680 *ppps = pps;
1681
1682 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
1683 pi->size);
1684 if (ruleno < 0) {
1685 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
1686 pi->id, pi->crush_ruleset, pi->type, pi->size);
1687 return;
1688 }
1689
1690 len = do_crush(osdmap, ruleno, pps, raw->osds,
1691 min_t(int, pi->size, ARRAY_SIZE(raw->osds)),
1692 osdmap->osd_weight, osdmap->max_osd);
1693 if (len < 0) {
1694 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
1695 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
1696 pi->size);
1697 return;
1698 }
1699
1700 raw->size = len;
1701 }
1702
1703 /*
1704 * Given raw set, calculate up set and up primary. By definition of an
1705 * up set, the result won't contain nonexistent or down OSDs.
1706 *
1707 * This is done in-place - on return @set is the up set. If it's
1708 * empty, ->primary will remain undefined.
1709 */
1710 static void raw_to_up_osds(struct ceph_osdmap *osdmap,
1711 struct ceph_pg_pool_info *pi,
1712 struct ceph_osds *set)
1713 {
1714 int i;
1715
1716 /* ->primary is undefined for a raw set */
1717 BUG_ON(set->primary != -1);
1718
1719 if (ceph_can_shift_osds(pi)) {
1720 int removed = 0;
1721
1722 /* shift left */
1723 for (i = 0; i < set->size; i++) {
1724 if (ceph_osd_is_down(osdmap, set->osds[i])) {
1725 removed++;
1726 continue;
1727 }
1728 if (removed)
1729 set->osds[i - removed] = set->osds[i];
1730 }
1731 set->size -= removed;
1732 if (set->size > 0)
1733 set->primary = set->osds[0];
1734 } else {
1735 /* set down/dne devices to NONE */
1736 for (i = set->size - 1; i >= 0; i--) {
1737 if (ceph_osd_is_down(osdmap, set->osds[i]))
1738 set->osds[i] = CRUSH_ITEM_NONE;
1739 else
1740 set->primary = set->osds[i];
1741 }
1742 }
1743 }
1744
1745 static void apply_primary_affinity(struct ceph_osdmap *osdmap,
1746 struct ceph_pg_pool_info *pi,
1747 u32 pps,
1748 struct ceph_osds *up)
1749 {
1750 int i;
1751 int pos = -1;
1752
1753 /*
1754 * Do we have any non-default primary_affinity values for these
1755 * osds?
1756 */
1757 if (!osdmap->osd_primary_affinity)
1758 return;
1759
1760 for (i = 0; i < up->size; i++) {
1761 int osd = up->osds[i];
1762
1763 if (osd != CRUSH_ITEM_NONE &&
1764 osdmap->osd_primary_affinity[osd] !=
1765 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
1766 break;
1767 }
1768 }
1769 if (i == up->size)
1770 return;
1771
1772 /*
1773 * Pick the primary. Feed both the seed (for the pg) and the
1774 * osd into the hash/rng so that a proportional fraction of an
1775 * osd's pgs get rejected as primary.
1776 */
1777 for (i = 0; i < up->size; i++) {
1778 int osd = up->osds[i];
1779 u32 aff;
1780
1781 if (osd == CRUSH_ITEM_NONE)
1782 continue;
1783
1784 aff = osdmap->osd_primary_affinity[osd];
1785 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
1786 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
1787 pps, osd) >> 16) >= aff) {
1788 /*
1789 * We chose not to use this primary. Note it
1790 * anyway as a fallback in case we don't pick
1791 * anyone else, but keep looking.
1792 */
1793 if (pos < 0)
1794 pos = i;
1795 } else {
1796 pos = i;
1797 break;
1798 }
1799 }
1800 if (pos < 0)
1801 return;
1802
1803 up->primary = up->osds[pos];
1804
1805 if (ceph_can_shift_osds(pi) && pos > 0) {
1806 /* move the new primary to the front */
1807 for (i = pos; i > 0; i--)
1808 up->osds[i] = up->osds[i - 1];
1809 up->osds[0] = up->primary;
1810 }
1811 }
1812
1813 /*
1814 * Get pg_temp and primary_temp mappings for given PG.
1815 *
1816 * Note that a PG may have none, only pg_temp, only primary_temp or
1817 * both pg_temp and primary_temp mappings. This means @temp isn't
1818 * always a valid OSD set on return: in the "only primary_temp" case,
1819 * @temp will have its ->primary >= 0 but ->size == 0.
1820 */
1821 static void get_temp_osds(struct ceph_osdmap *osdmap,
1822 struct ceph_pg_pool_info *pi,
1823 const struct ceph_pg *raw_pgid,
1824 struct ceph_osds *temp)
1825 {
1826 struct ceph_pg pgid;
1827 struct ceph_pg_mapping *pg;
1828 int i;
1829
1830 raw_pg_to_pg(pi, raw_pgid, &pgid);
1831 ceph_osds_init(temp);
1832
1833 /* pg_temp? */
1834 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1835 if (pg) {
1836 for (i = 0; i < pg->pg_temp.len; i++) {
1837 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
1838 if (ceph_can_shift_osds(pi))
1839 continue;
1840
1841 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
1842 } else {
1843 temp->osds[temp->size++] = pg->pg_temp.osds[i];
1844 }
1845 }
1846
1847 /* apply pg_temp's primary */
1848 for (i = 0; i < temp->size; i++) {
1849 if (temp->osds[i] != CRUSH_ITEM_NONE) {
1850 temp->primary = temp->osds[i];
1851 break;
1852 }
1853 }
1854 }
1855
1856 /* primary_temp? */
1857 pg = __lookup_pg_mapping(&osdmap->primary_temp, pgid);
1858 if (pg)
1859 temp->primary = pg->primary_temp.osd;
1860 }
1861
1862 /*
1863 * Map a PG to its acting set as well as its up set.
1864 *
1865 * Acting set is used for data mapping purposes, while up set can be
1866 * recorded for detecting interval changes and deciding whether to
1867 * resend a request.
1868 */
1869 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
1870 const struct ceph_pg *raw_pgid,
1871 struct ceph_osds *up,
1872 struct ceph_osds *acting)
1873 {
1874 struct ceph_pg_pool_info *pi;
1875 u32 pps;
1876
1877 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
1878 if (!pi) {
1879 ceph_osds_init(up);
1880 ceph_osds_init(acting);
1881 goto out;
1882 }
1883
1884 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
1885 raw_to_up_osds(osdmap, pi, up);
1886 apply_primary_affinity(osdmap, pi, pps, up);
1887 get_temp_osds(osdmap, pi, raw_pgid, acting);
1888 if (!acting->size) {
1889 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
1890 acting->size = up->size;
1891 if (acting->primary == -1)
1892 acting->primary = up->primary;
1893 }
1894 out:
1895 WARN_ON(!osds_valid(up) || !osds_valid(acting));
1896 }
1897
1898 /*
1899 * Return primary osd for given pgid, or -1 if none.
1900 */
1901 int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1902 {
1903 struct ceph_osds up, acting;
1904
1905 ceph_pg_to_up_acting_osds(osdmap, &pgid, &up, &acting);
1906 return acting.primary;
1907 }
1908 EXPORT_SYMBOL(ceph_calc_pg_primary);
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