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libceph: handle non-empty dest in ceph_{oloc,oid}_copy()
[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 void crush_finalize(struct crush_map *c)
157 {
158 __s32 b;
159
160 /* Space for the array of pointers to per-bucket workspace */
161 c->working_size = sizeof(struct crush_work) +
162 c->max_buckets * sizeof(struct crush_work_bucket *);
163
164 for (b = 0; b < c->max_buckets; b++) {
165 if (!c->buckets[b])
166 continue;
167
168 switch (c->buckets[b]->alg) {
169 default:
170 /*
171 * The base case, permutation variables and
172 * the pointer to the permutation array.
173 */
174 c->working_size += sizeof(struct crush_work_bucket);
175 break;
176 }
177 /* Every bucket has a permutation array. */
178 c->working_size += c->buckets[b]->size * sizeof(__u32);
179 }
180 }
181
182 static struct crush_map *crush_decode(void *pbyval, void *end)
183 {
184 struct crush_map *c;
185 int err = -EINVAL;
186 int i, j;
187 void **p = &pbyval;
188 void *start = pbyval;
189 u32 magic;
190 u32 num_name_maps;
191
192 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
193
194 c = kzalloc(sizeof(*c), GFP_NOFS);
195 if (c == NULL)
196 return ERR_PTR(-ENOMEM);
197
198 /* set tunables to default values */
199 c->choose_local_tries = 2;
200 c->choose_local_fallback_tries = 5;
201 c->choose_total_tries = 19;
202 c->chooseleaf_descend_once = 0;
203
204 ceph_decode_need(p, end, 4*sizeof(u32), bad);
205 magic = ceph_decode_32(p);
206 if (magic != CRUSH_MAGIC) {
207 pr_err("crush_decode magic %x != current %x\n",
208 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
209 goto bad;
210 }
211 c->max_buckets = ceph_decode_32(p);
212 c->max_rules = ceph_decode_32(p);
213 c->max_devices = ceph_decode_32(p);
214
215 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
216 if (c->buckets == NULL)
217 goto badmem;
218 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
219 if (c->rules == NULL)
220 goto badmem;
221
222 /* buckets */
223 for (i = 0; i < c->max_buckets; i++) {
224 int size = 0;
225 u32 alg;
226 struct crush_bucket *b;
227
228 ceph_decode_32_safe(p, end, alg, bad);
229 if (alg == 0) {
230 c->buckets[i] = NULL;
231 continue;
232 }
233 dout("crush_decode bucket %d off %x %p to %p\n",
234 i, (int)(*p-start), *p, end);
235
236 switch (alg) {
237 case CRUSH_BUCKET_UNIFORM:
238 size = sizeof(struct crush_bucket_uniform);
239 break;
240 case CRUSH_BUCKET_LIST:
241 size = sizeof(struct crush_bucket_list);
242 break;
243 case CRUSH_BUCKET_TREE:
244 size = sizeof(struct crush_bucket_tree);
245 break;
246 case CRUSH_BUCKET_STRAW:
247 size = sizeof(struct crush_bucket_straw);
248 break;
249 case CRUSH_BUCKET_STRAW2:
250 size = sizeof(struct crush_bucket_straw2);
251 break;
252 default:
253 err = -EINVAL;
254 goto bad;
255 }
256 BUG_ON(size == 0);
257 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
258 if (b == NULL)
259 goto badmem;
260
261 ceph_decode_need(p, end, 4*sizeof(u32), bad);
262 b->id = ceph_decode_32(p);
263 b->type = ceph_decode_16(p);
264 b->alg = ceph_decode_8(p);
265 b->hash = ceph_decode_8(p);
266 b->weight = ceph_decode_32(p);
267 b->size = ceph_decode_32(p);
268
269 dout("crush_decode bucket size %d off %x %p to %p\n",
270 b->size, (int)(*p-start), *p, end);
271
272 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
273 if (b->items == NULL)
274 goto badmem;
275
276 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
277 for (j = 0; j < b->size; j++)
278 b->items[j] = ceph_decode_32(p);
279
280 switch (b->alg) {
281 case CRUSH_BUCKET_UNIFORM:
282 err = crush_decode_uniform_bucket(p, end,
283 (struct crush_bucket_uniform *)b);
284 if (err < 0)
285 goto bad;
286 break;
287 case CRUSH_BUCKET_LIST:
288 err = crush_decode_list_bucket(p, end,
289 (struct crush_bucket_list *)b);
290 if (err < 0)
291 goto bad;
292 break;
293 case CRUSH_BUCKET_TREE:
294 err = crush_decode_tree_bucket(p, end,
295 (struct crush_bucket_tree *)b);
296 if (err < 0)
297 goto bad;
298 break;
299 case CRUSH_BUCKET_STRAW:
300 err = crush_decode_straw_bucket(p, end,
301 (struct crush_bucket_straw *)b);
302 if (err < 0)
303 goto bad;
304 break;
305 case CRUSH_BUCKET_STRAW2:
306 err = crush_decode_straw2_bucket(p, end,
307 (struct crush_bucket_straw2 *)b);
308 if (err < 0)
309 goto bad;
310 break;
311 }
312 }
313
314 /* rules */
315 dout("rule vec is %p\n", c->rules);
316 for (i = 0; i < c->max_rules; i++) {
317 u32 yes;
318 struct crush_rule *r;
319
320 err = -EINVAL;
321 ceph_decode_32_safe(p, end, yes, bad);
322 if (!yes) {
323 dout("crush_decode NO rule %d off %x %p to %p\n",
324 i, (int)(*p-start), *p, end);
325 c->rules[i] = NULL;
326 continue;
327 }
328
329 dout("crush_decode rule %d off %x %p to %p\n",
330 i, (int)(*p-start), *p, end);
331
332 /* len */
333 ceph_decode_32_safe(p, end, yes, bad);
334 #if BITS_PER_LONG == 32
335 err = -EINVAL;
336 if (yes > (ULONG_MAX - sizeof(*r))
337 / sizeof(struct crush_rule_step))
338 goto bad;
339 #endif
340 r = c->rules[i] = kmalloc(sizeof(*r) +
341 yes*sizeof(struct crush_rule_step),
342 GFP_NOFS);
343 if (r == NULL)
344 goto badmem;
345 dout(" rule %d is at %p\n", i, r);
346 r->len = yes;
347 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
348 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
349 for (j = 0; j < r->len; j++) {
350 r->steps[j].op = ceph_decode_32(p);
351 r->steps[j].arg1 = ceph_decode_32(p);
352 r->steps[j].arg2 = ceph_decode_32(p);
353 }
354 }
355
356 /* ignore trailing name maps. */
357 for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) {
358 err = skip_name_map(p, end);
359 if (err < 0)
360 goto done;
361 }
362
363 /* tunables */
364 ceph_decode_need(p, end, 3*sizeof(u32), done);
365 c->choose_local_tries = ceph_decode_32(p);
366 c->choose_local_fallback_tries = ceph_decode_32(p);
367 c->choose_total_tries = ceph_decode_32(p);
368 dout("crush decode tunable choose_local_tries = %d\n",
369 c->choose_local_tries);
370 dout("crush decode tunable choose_local_fallback_tries = %d\n",
371 c->choose_local_fallback_tries);
372 dout("crush decode tunable choose_total_tries = %d\n",
373 c->choose_total_tries);
374
375 ceph_decode_need(p, end, sizeof(u32), done);
376 c->chooseleaf_descend_once = ceph_decode_32(p);
377 dout("crush decode tunable chooseleaf_descend_once = %d\n",
378 c->chooseleaf_descend_once);
379
380 ceph_decode_need(p, end, sizeof(u8), done);
381 c->chooseleaf_vary_r = ceph_decode_8(p);
382 dout("crush decode tunable chooseleaf_vary_r = %d\n",
383 c->chooseleaf_vary_r);
384
385 /* skip straw_calc_version, allowed_bucket_algs */
386 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
387 *p += sizeof(u8) + sizeof(u32);
388
389 ceph_decode_need(p, end, sizeof(u8), done);
390 c->chooseleaf_stable = ceph_decode_8(p);
391 dout("crush decode tunable chooseleaf_stable = %d\n",
392 c->chooseleaf_stable);
393
394 done:
395 crush_finalize(c);
396 dout("crush_decode success\n");
397 return c;
398
399 badmem:
400 err = -ENOMEM;
401 bad:
402 dout("crush_decode fail %d\n", err);
403 crush_destroy(c);
404 return ERR_PTR(err);
405 }
406
407 int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
408 {
409 if (lhs->pool < rhs->pool)
410 return -1;
411 if (lhs->pool > rhs->pool)
412 return 1;
413 if (lhs->seed < rhs->seed)
414 return -1;
415 if (lhs->seed > rhs->seed)
416 return 1;
417
418 return 0;
419 }
420
421 /*
422 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
423 * to a set of osds) and primary_temp (explicit primary setting)
424 */
425 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
426 struct rb_root *root)
427 {
428 struct rb_node **p = &root->rb_node;
429 struct rb_node *parent = NULL;
430 struct ceph_pg_mapping *pg = NULL;
431 int c;
432
433 dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
434 while (*p) {
435 parent = *p;
436 pg = rb_entry(parent, struct ceph_pg_mapping, node);
437 c = ceph_pg_compare(&new->pgid, &pg->pgid);
438 if (c < 0)
439 p = &(*p)->rb_left;
440 else if (c > 0)
441 p = &(*p)->rb_right;
442 else
443 return -EEXIST;
444 }
445
446 rb_link_node(&new->node, parent, p);
447 rb_insert_color(&new->node, root);
448 return 0;
449 }
450
451 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
452 struct ceph_pg pgid)
453 {
454 struct rb_node *n = root->rb_node;
455 struct ceph_pg_mapping *pg;
456 int c;
457
458 while (n) {
459 pg = rb_entry(n, struct ceph_pg_mapping, node);
460 c = ceph_pg_compare(&pgid, &pg->pgid);
461 if (c < 0) {
462 n = n->rb_left;
463 } else if (c > 0) {
464 n = n->rb_right;
465 } else {
466 dout("__lookup_pg_mapping %lld.%x got %p\n",
467 pgid.pool, pgid.seed, pg);
468 return pg;
469 }
470 }
471 return NULL;
472 }
473
474 static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
475 {
476 struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
477
478 if (pg) {
479 dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
480 pg);
481 rb_erase(&pg->node, root);
482 kfree(pg);
483 return 0;
484 }
485 dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
486 return -ENOENT;
487 }
488
489 /*
490 * rbtree of pg pool info
491 */
492 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
493 {
494 struct rb_node **p = &root->rb_node;
495 struct rb_node *parent = NULL;
496 struct ceph_pg_pool_info *pi = NULL;
497
498 while (*p) {
499 parent = *p;
500 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
501 if (new->id < pi->id)
502 p = &(*p)->rb_left;
503 else if (new->id > pi->id)
504 p = &(*p)->rb_right;
505 else
506 return -EEXIST;
507 }
508
509 rb_link_node(&new->node, parent, p);
510 rb_insert_color(&new->node, root);
511 return 0;
512 }
513
514 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
515 {
516 struct ceph_pg_pool_info *pi;
517 struct rb_node *n = root->rb_node;
518
519 while (n) {
520 pi = rb_entry(n, struct ceph_pg_pool_info, node);
521 if (id < pi->id)
522 n = n->rb_left;
523 else if (id > pi->id)
524 n = n->rb_right;
525 else
526 return pi;
527 }
528 return NULL;
529 }
530
531 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
532 {
533 return __lookup_pg_pool(&map->pg_pools, id);
534 }
535
536 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
537 {
538 struct ceph_pg_pool_info *pi;
539
540 if (id == CEPH_NOPOOL)
541 return NULL;
542
543 if (WARN_ON_ONCE(id > (u64) INT_MAX))
544 return NULL;
545
546 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
547
548 return pi ? pi->name : NULL;
549 }
550 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
551
552 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
553 {
554 struct rb_node *rbp;
555
556 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
557 struct ceph_pg_pool_info *pi =
558 rb_entry(rbp, struct ceph_pg_pool_info, node);
559 if (pi->name && strcmp(pi->name, name) == 0)
560 return pi->id;
561 }
562 return -ENOENT;
563 }
564 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
565
566 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
567 {
568 rb_erase(&pi->node, root);
569 kfree(pi->name);
570 kfree(pi);
571 }
572
573 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
574 {
575 u8 ev, cv;
576 unsigned len, num;
577 void *pool_end;
578
579 ceph_decode_need(p, end, 2 + 4, bad);
580 ev = ceph_decode_8(p); /* encoding version */
581 cv = ceph_decode_8(p); /* compat version */
582 if (ev < 5) {
583 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
584 return -EINVAL;
585 }
586 if (cv > 9) {
587 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
588 return -EINVAL;
589 }
590 len = ceph_decode_32(p);
591 ceph_decode_need(p, end, len, bad);
592 pool_end = *p + len;
593
594 pi->type = ceph_decode_8(p);
595 pi->size = ceph_decode_8(p);
596 pi->crush_ruleset = ceph_decode_8(p);
597 pi->object_hash = ceph_decode_8(p);
598
599 pi->pg_num = ceph_decode_32(p);
600 pi->pgp_num = ceph_decode_32(p);
601
602 *p += 4 + 4; /* skip lpg* */
603 *p += 4; /* skip last_change */
604 *p += 8 + 4; /* skip snap_seq, snap_epoch */
605
606 /* skip snaps */
607 num = ceph_decode_32(p);
608 while (num--) {
609 *p += 8; /* snapid key */
610 *p += 1 + 1; /* versions */
611 len = ceph_decode_32(p);
612 *p += len;
613 }
614
615 /* skip removed_snaps */
616 num = ceph_decode_32(p);
617 *p += num * (8 + 8);
618
619 *p += 8; /* skip auid */
620 pi->flags = ceph_decode_64(p);
621 *p += 4; /* skip crash_replay_interval */
622
623 if (ev >= 7)
624 pi->min_size = ceph_decode_8(p);
625 else
626 pi->min_size = pi->size - pi->size / 2;
627
628 if (ev >= 8)
629 *p += 8 + 8; /* skip quota_max_* */
630
631 if (ev >= 9) {
632 /* skip tiers */
633 num = ceph_decode_32(p);
634 *p += num * 8;
635
636 *p += 8; /* skip tier_of */
637 *p += 1; /* skip cache_mode */
638
639 pi->read_tier = ceph_decode_64(p);
640 pi->write_tier = ceph_decode_64(p);
641 } else {
642 pi->read_tier = -1;
643 pi->write_tier = -1;
644 }
645
646 if (ev >= 10) {
647 /* skip properties */
648 num = ceph_decode_32(p);
649 while (num--) {
650 len = ceph_decode_32(p);
651 *p += len; /* key */
652 len = ceph_decode_32(p);
653 *p += len; /* val */
654 }
655 }
656
657 if (ev >= 11) {
658 /* skip hit_set_params */
659 *p += 1 + 1; /* versions */
660 len = ceph_decode_32(p);
661 *p += len;
662
663 *p += 4; /* skip hit_set_period */
664 *p += 4; /* skip hit_set_count */
665 }
666
667 if (ev >= 12)
668 *p += 4; /* skip stripe_width */
669
670 if (ev >= 13) {
671 *p += 8; /* skip target_max_bytes */
672 *p += 8; /* skip target_max_objects */
673 *p += 4; /* skip cache_target_dirty_ratio_micro */
674 *p += 4; /* skip cache_target_full_ratio_micro */
675 *p += 4; /* skip cache_min_flush_age */
676 *p += 4; /* skip cache_min_evict_age */
677 }
678
679 if (ev >= 14) {
680 /* skip erasure_code_profile */
681 len = ceph_decode_32(p);
682 *p += len;
683 }
684
685 if (ev >= 15)
686 pi->last_force_request_resend = ceph_decode_32(p);
687 else
688 pi->last_force_request_resend = 0;
689
690 /* ignore the rest */
691
692 *p = pool_end;
693 calc_pg_masks(pi);
694 return 0;
695
696 bad:
697 return -EINVAL;
698 }
699
700 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
701 {
702 struct ceph_pg_pool_info *pi;
703 u32 num, len;
704 u64 pool;
705
706 ceph_decode_32_safe(p, end, num, bad);
707 dout(" %d pool names\n", num);
708 while (num--) {
709 ceph_decode_64_safe(p, end, pool, bad);
710 ceph_decode_32_safe(p, end, len, bad);
711 dout(" pool %llu len %d\n", pool, len);
712 ceph_decode_need(p, end, len, bad);
713 pi = __lookup_pg_pool(&map->pg_pools, pool);
714 if (pi) {
715 char *name = kstrndup(*p, len, GFP_NOFS);
716
717 if (!name)
718 return -ENOMEM;
719 kfree(pi->name);
720 pi->name = name;
721 dout(" name is %s\n", pi->name);
722 }
723 *p += len;
724 }
725 return 0;
726
727 bad:
728 return -EINVAL;
729 }
730
731 /*
732 * osd map
733 */
734 struct ceph_osdmap *ceph_osdmap_alloc(void)
735 {
736 struct ceph_osdmap *map;
737
738 map = kzalloc(sizeof(*map), GFP_NOIO);
739 if (!map)
740 return NULL;
741
742 map->pg_pools = RB_ROOT;
743 map->pool_max = -1;
744 map->pg_temp = RB_ROOT;
745 map->primary_temp = RB_ROOT;
746 mutex_init(&map->crush_workspace_mutex);
747
748 return map;
749 }
750
751 void ceph_osdmap_destroy(struct ceph_osdmap *map)
752 {
753 dout("osdmap_destroy %p\n", map);
754 if (map->crush)
755 crush_destroy(map->crush);
756 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
757 struct ceph_pg_mapping *pg =
758 rb_entry(rb_first(&map->pg_temp),
759 struct ceph_pg_mapping, node);
760 rb_erase(&pg->node, &map->pg_temp);
761 kfree(pg);
762 }
763 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
764 struct ceph_pg_mapping *pg =
765 rb_entry(rb_first(&map->primary_temp),
766 struct ceph_pg_mapping, node);
767 rb_erase(&pg->node, &map->primary_temp);
768 kfree(pg);
769 }
770 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
771 struct ceph_pg_pool_info *pi =
772 rb_entry(rb_first(&map->pg_pools),
773 struct ceph_pg_pool_info, node);
774 __remove_pg_pool(&map->pg_pools, pi);
775 }
776 kfree(map->osd_state);
777 kfree(map->osd_weight);
778 kfree(map->osd_addr);
779 kfree(map->osd_primary_affinity);
780 kfree(map->crush_workspace);
781 kfree(map);
782 }
783
784 /*
785 * Adjust max_osd value, (re)allocate arrays.
786 *
787 * The new elements are properly initialized.
788 */
789 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
790 {
791 u8 *state;
792 u32 *weight;
793 struct ceph_entity_addr *addr;
794 int i;
795
796 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
797 if (!state)
798 return -ENOMEM;
799 map->osd_state = state;
800
801 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
802 if (!weight)
803 return -ENOMEM;
804 map->osd_weight = weight;
805
806 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
807 if (!addr)
808 return -ENOMEM;
809 map->osd_addr = addr;
810
811 for (i = map->max_osd; i < max; i++) {
812 map->osd_state[i] = 0;
813 map->osd_weight[i] = CEPH_OSD_OUT;
814 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
815 }
816
817 if (map->osd_primary_affinity) {
818 u32 *affinity;
819
820 affinity = krealloc(map->osd_primary_affinity,
821 max*sizeof(*affinity), GFP_NOFS);
822 if (!affinity)
823 return -ENOMEM;
824 map->osd_primary_affinity = affinity;
825
826 for (i = map->max_osd; i < max; i++)
827 map->osd_primary_affinity[i] =
828 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
829 }
830
831 map->max_osd = max;
832
833 return 0;
834 }
835
836 static int osdmap_set_crush(struct ceph_osdmap *map, struct crush_map *crush)
837 {
838 void *workspace;
839 size_t work_size;
840
841 if (IS_ERR(crush))
842 return PTR_ERR(crush);
843
844 work_size = crush_work_size(crush, CEPH_PG_MAX_SIZE);
845 dout("%s work_size %zu bytes\n", __func__, work_size);
846 workspace = kmalloc(work_size, GFP_NOIO);
847 if (!workspace) {
848 crush_destroy(crush);
849 return -ENOMEM;
850 }
851 crush_init_workspace(crush, workspace);
852
853 if (map->crush)
854 crush_destroy(map->crush);
855 kfree(map->crush_workspace);
856 map->crush = crush;
857 map->crush_workspace = workspace;
858 return 0;
859 }
860
861 #define OSDMAP_WRAPPER_COMPAT_VER 7
862 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
863
864 /*
865 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
866 * to struct_v of the client_data section for new (v7 and above)
867 * osdmaps.
868 */
869 static int get_osdmap_client_data_v(void **p, void *end,
870 const char *prefix, u8 *v)
871 {
872 u8 struct_v;
873
874 ceph_decode_8_safe(p, end, struct_v, e_inval);
875 if (struct_v >= 7) {
876 u8 struct_compat;
877
878 ceph_decode_8_safe(p, end, struct_compat, e_inval);
879 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
880 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
881 struct_v, struct_compat,
882 OSDMAP_WRAPPER_COMPAT_VER, prefix);
883 return -EINVAL;
884 }
885 *p += 4; /* ignore wrapper struct_len */
886
887 ceph_decode_8_safe(p, end, struct_v, e_inval);
888 ceph_decode_8_safe(p, end, struct_compat, e_inval);
889 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
890 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
891 struct_v, struct_compat,
892 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
893 return -EINVAL;
894 }
895 *p += 4; /* ignore client data struct_len */
896 } else {
897 u16 version;
898
899 *p -= 1;
900 ceph_decode_16_safe(p, end, version, e_inval);
901 if (version < 6) {
902 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
903 version, prefix);
904 return -EINVAL;
905 }
906
907 /* old osdmap enconding */
908 struct_v = 0;
909 }
910
911 *v = struct_v;
912 return 0;
913
914 e_inval:
915 return -EINVAL;
916 }
917
918 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
919 bool incremental)
920 {
921 u32 n;
922
923 ceph_decode_32_safe(p, end, n, e_inval);
924 while (n--) {
925 struct ceph_pg_pool_info *pi;
926 u64 pool;
927 int ret;
928
929 ceph_decode_64_safe(p, end, pool, e_inval);
930
931 pi = __lookup_pg_pool(&map->pg_pools, pool);
932 if (!incremental || !pi) {
933 pi = kzalloc(sizeof(*pi), GFP_NOFS);
934 if (!pi)
935 return -ENOMEM;
936
937 pi->id = pool;
938
939 ret = __insert_pg_pool(&map->pg_pools, pi);
940 if (ret) {
941 kfree(pi);
942 return ret;
943 }
944 }
945
946 ret = decode_pool(p, end, pi);
947 if (ret)
948 return ret;
949 }
950
951 return 0;
952
953 e_inval:
954 return -EINVAL;
955 }
956
957 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
958 {
959 return __decode_pools(p, end, map, false);
960 }
961
962 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
963 {
964 return __decode_pools(p, end, map, true);
965 }
966
967 static int __decode_pg_temp(void **p, void *end, struct ceph_osdmap *map,
968 bool incremental)
969 {
970 u32 n;
971
972 ceph_decode_32_safe(p, end, n, e_inval);
973 while (n--) {
974 struct ceph_pg pgid;
975 u32 len, i;
976 int ret;
977
978 ret = ceph_decode_pgid(p, end, &pgid);
979 if (ret)
980 return ret;
981
982 ceph_decode_32_safe(p, end, len, e_inval);
983
984 ret = __remove_pg_mapping(&map->pg_temp, pgid);
985 BUG_ON(!incremental && ret != -ENOENT);
986
987 if (!incremental || len > 0) {
988 struct ceph_pg_mapping *pg;
989
990 ceph_decode_need(p, end, len*sizeof(u32), e_inval);
991
992 if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
993 return -EINVAL;
994
995 pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
996 if (!pg)
997 return -ENOMEM;
998
999 pg->pgid = pgid;
1000 pg->pg_temp.len = len;
1001 for (i = 0; i < len; i++)
1002 pg->pg_temp.osds[i] = ceph_decode_32(p);
1003
1004 ret = __insert_pg_mapping(pg, &map->pg_temp);
1005 if (ret) {
1006 kfree(pg);
1007 return ret;
1008 }
1009 }
1010 }
1011
1012 return 0;
1013
1014 e_inval:
1015 return -EINVAL;
1016 }
1017
1018 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1019 {
1020 return __decode_pg_temp(p, end, map, false);
1021 }
1022
1023 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1024 {
1025 return __decode_pg_temp(p, end, map, true);
1026 }
1027
1028 static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
1029 bool incremental)
1030 {
1031 u32 n;
1032
1033 ceph_decode_32_safe(p, end, n, e_inval);
1034 while (n--) {
1035 struct ceph_pg pgid;
1036 u32 osd;
1037 int ret;
1038
1039 ret = ceph_decode_pgid(p, end, &pgid);
1040 if (ret)
1041 return ret;
1042
1043 ceph_decode_32_safe(p, end, osd, e_inval);
1044
1045 ret = __remove_pg_mapping(&map->primary_temp, pgid);
1046 BUG_ON(!incremental && ret != -ENOENT);
1047
1048 if (!incremental || osd != (u32)-1) {
1049 struct ceph_pg_mapping *pg;
1050
1051 pg = kzalloc(sizeof(*pg), GFP_NOFS);
1052 if (!pg)
1053 return -ENOMEM;
1054
1055 pg->pgid = pgid;
1056 pg->primary_temp.osd = osd;
1057
1058 ret = __insert_pg_mapping(pg, &map->primary_temp);
1059 if (ret) {
1060 kfree(pg);
1061 return ret;
1062 }
1063 }
1064 }
1065
1066 return 0;
1067
1068 e_inval:
1069 return -EINVAL;
1070 }
1071
1072 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
1073 {
1074 return __decode_primary_temp(p, end, map, false);
1075 }
1076
1077 static int decode_new_primary_temp(void **p, void *end,
1078 struct ceph_osdmap *map)
1079 {
1080 return __decode_primary_temp(p, end, map, true);
1081 }
1082
1083 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
1084 {
1085 BUG_ON(osd >= map->max_osd);
1086
1087 if (!map->osd_primary_affinity)
1088 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1089
1090 return map->osd_primary_affinity[osd];
1091 }
1092
1093 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
1094 {
1095 BUG_ON(osd >= map->max_osd);
1096
1097 if (!map->osd_primary_affinity) {
1098 int i;
1099
1100 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
1101 GFP_NOFS);
1102 if (!map->osd_primary_affinity)
1103 return -ENOMEM;
1104
1105 for (i = 0; i < map->max_osd; i++)
1106 map->osd_primary_affinity[i] =
1107 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1108 }
1109
1110 map->osd_primary_affinity[osd] = aff;
1111
1112 return 0;
1113 }
1114
1115 static int decode_primary_affinity(void **p, void *end,
1116 struct ceph_osdmap *map)
1117 {
1118 u32 len, i;
1119
1120 ceph_decode_32_safe(p, end, len, e_inval);
1121 if (len == 0) {
1122 kfree(map->osd_primary_affinity);
1123 map->osd_primary_affinity = NULL;
1124 return 0;
1125 }
1126 if (len != map->max_osd)
1127 goto e_inval;
1128
1129 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1130
1131 for (i = 0; i < map->max_osd; i++) {
1132 int ret;
1133
1134 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1135 if (ret)
1136 return ret;
1137 }
1138
1139 return 0;
1140
1141 e_inval:
1142 return -EINVAL;
1143 }
1144
1145 static int decode_new_primary_affinity(void **p, void *end,
1146 struct ceph_osdmap *map)
1147 {
1148 u32 n;
1149
1150 ceph_decode_32_safe(p, end, n, e_inval);
1151 while (n--) {
1152 u32 osd, aff;
1153 int ret;
1154
1155 ceph_decode_32_safe(p, end, osd, e_inval);
1156 ceph_decode_32_safe(p, end, aff, e_inval);
1157
1158 ret = set_primary_affinity(map, osd, aff);
1159 if (ret)
1160 return ret;
1161
1162 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1163 }
1164
1165 return 0;
1166
1167 e_inval:
1168 return -EINVAL;
1169 }
1170
1171 /*
1172 * decode a full map.
1173 */
1174 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1175 {
1176 u8 struct_v;
1177 u32 epoch = 0;
1178 void *start = *p;
1179 u32 max;
1180 u32 len, i;
1181 int err;
1182
1183 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1184
1185 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1186 if (err)
1187 goto bad;
1188
1189 /* fsid, epoch, created, modified */
1190 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1191 sizeof(map->created) + sizeof(map->modified), e_inval);
1192 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1193 epoch = map->epoch = ceph_decode_32(p);
1194 ceph_decode_copy(p, &map->created, sizeof(map->created));
1195 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1196
1197 /* pools */
1198 err = decode_pools(p, end, map);
1199 if (err)
1200 goto bad;
1201
1202 /* pool_name */
1203 err = decode_pool_names(p, end, map);
1204 if (err)
1205 goto bad;
1206
1207 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1208
1209 ceph_decode_32_safe(p, end, map->flags, e_inval);
1210
1211 /* max_osd */
1212 ceph_decode_32_safe(p, end, max, e_inval);
1213
1214 /* (re)alloc osd arrays */
1215 err = osdmap_set_max_osd(map, max);
1216 if (err)
1217 goto bad;
1218
1219 /* osd_state, osd_weight, osd_addrs->client_addr */
1220 ceph_decode_need(p, end, 3*sizeof(u32) +
1221 map->max_osd*(1 + sizeof(*map->osd_weight) +
1222 sizeof(*map->osd_addr)), e_inval);
1223
1224 if (ceph_decode_32(p) != map->max_osd)
1225 goto e_inval;
1226
1227 ceph_decode_copy(p, map->osd_state, map->max_osd);
1228
1229 if (ceph_decode_32(p) != map->max_osd)
1230 goto e_inval;
1231
1232 for (i = 0; i < map->max_osd; i++)
1233 map->osd_weight[i] = ceph_decode_32(p);
1234
1235 if (ceph_decode_32(p) != map->max_osd)
1236 goto e_inval;
1237
1238 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1239 for (i = 0; i < map->max_osd; i++)
1240 ceph_decode_addr(&map->osd_addr[i]);
1241
1242 /* pg_temp */
1243 err = decode_pg_temp(p, end, map);
1244 if (err)
1245 goto bad;
1246
1247 /* primary_temp */
1248 if (struct_v >= 1) {
1249 err = decode_primary_temp(p, end, map);
1250 if (err)
1251 goto bad;
1252 }
1253
1254 /* primary_affinity */
1255 if (struct_v >= 2) {
1256 err = decode_primary_affinity(p, end, map);
1257 if (err)
1258 goto bad;
1259 } else {
1260 /* XXX can this happen? */
1261 kfree(map->osd_primary_affinity);
1262 map->osd_primary_affinity = NULL;
1263 }
1264
1265 /* crush */
1266 ceph_decode_32_safe(p, end, len, e_inval);
1267 err = osdmap_set_crush(map, crush_decode(*p, min(*p + len, end)));
1268 if (err)
1269 goto bad;
1270
1271 /* ignore the rest */
1272 *p = end;
1273
1274 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1275 return 0;
1276
1277 e_inval:
1278 err = -EINVAL;
1279 bad:
1280 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1281 err, epoch, (int)(*p - start), *p, start, end);
1282 print_hex_dump(KERN_DEBUG, "osdmap: ",
1283 DUMP_PREFIX_OFFSET, 16, 1,
1284 start, end - start, true);
1285 return err;
1286 }
1287
1288 /*
1289 * Allocate and decode a full map.
1290 */
1291 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1292 {
1293 struct ceph_osdmap *map;
1294 int ret;
1295
1296 map = ceph_osdmap_alloc();
1297 if (!map)
1298 return ERR_PTR(-ENOMEM);
1299
1300 ret = osdmap_decode(p, end, map);
1301 if (ret) {
1302 ceph_osdmap_destroy(map);
1303 return ERR_PTR(ret);
1304 }
1305
1306 return map;
1307 }
1308
1309 /*
1310 * Encoding order is (new_up_client, new_state, new_weight). Need to
1311 * apply in the (new_weight, new_state, new_up_client) order, because
1312 * an incremental map may look like e.g.
1313 *
1314 * new_up_client: { osd=6, addr=... } # set osd_state and addr
1315 * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
1316 */
1317 static int decode_new_up_state_weight(void **p, void *end,
1318 struct ceph_osdmap *map)
1319 {
1320 void *new_up_client;
1321 void *new_state;
1322 void *new_weight_end;
1323 u32 len;
1324
1325 new_up_client = *p;
1326 ceph_decode_32_safe(p, end, len, e_inval);
1327 len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
1328 ceph_decode_need(p, end, len, e_inval);
1329 *p += len;
1330
1331 new_state = *p;
1332 ceph_decode_32_safe(p, end, len, e_inval);
1333 len *= sizeof(u32) + sizeof(u8);
1334 ceph_decode_need(p, end, len, e_inval);
1335 *p += len;
1336
1337 /* new_weight */
1338 ceph_decode_32_safe(p, end, len, e_inval);
1339 while (len--) {
1340 s32 osd;
1341 u32 w;
1342
1343 ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
1344 osd = ceph_decode_32(p);
1345 w = ceph_decode_32(p);
1346 BUG_ON(osd >= map->max_osd);
1347 pr_info("osd%d weight 0x%x %s\n", osd, w,
1348 w == CEPH_OSD_IN ? "(in)" :
1349 (w == CEPH_OSD_OUT ? "(out)" : ""));
1350 map->osd_weight[osd] = w;
1351
1352 /*
1353 * If we are marking in, set the EXISTS, and clear the
1354 * AUTOOUT and NEW bits.
1355 */
1356 if (w) {
1357 map->osd_state[osd] |= CEPH_OSD_EXISTS;
1358 map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
1359 CEPH_OSD_NEW);
1360 }
1361 }
1362 new_weight_end = *p;
1363
1364 /* new_state (up/down) */
1365 *p = new_state;
1366 len = ceph_decode_32(p);
1367 while (len--) {
1368 s32 osd;
1369 u8 xorstate;
1370 int ret;
1371
1372 osd = ceph_decode_32(p);
1373 xorstate = ceph_decode_8(p);
1374 if (xorstate == 0)
1375 xorstate = CEPH_OSD_UP;
1376 BUG_ON(osd >= map->max_osd);
1377 if ((map->osd_state[osd] & CEPH_OSD_UP) &&
1378 (xorstate & CEPH_OSD_UP))
1379 pr_info("osd%d down\n", osd);
1380 if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
1381 (xorstate & CEPH_OSD_EXISTS)) {
1382 pr_info("osd%d does not exist\n", osd);
1383 ret = set_primary_affinity(map, osd,
1384 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
1385 if (ret)
1386 return ret;
1387 memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
1388 map->osd_state[osd] = 0;
1389 } else {
1390 map->osd_state[osd] ^= xorstate;
1391 }
1392 }
1393
1394 /* new_up_client */
1395 *p = new_up_client;
1396 len = ceph_decode_32(p);
1397 while (len--) {
1398 s32 osd;
1399 struct ceph_entity_addr addr;
1400
1401 osd = ceph_decode_32(p);
1402 ceph_decode_copy(p, &addr, sizeof(addr));
1403 ceph_decode_addr(&addr);
1404 BUG_ON(osd >= map->max_osd);
1405 pr_info("osd%d up\n", osd);
1406 map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
1407 map->osd_addr[osd] = addr;
1408 }
1409
1410 *p = new_weight_end;
1411 return 0;
1412
1413 e_inval:
1414 return -EINVAL;
1415 }
1416
1417 /*
1418 * decode and apply an incremental map update.
1419 */
1420 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1421 struct ceph_osdmap *map)
1422 {
1423 struct ceph_fsid fsid;
1424 u32 epoch = 0;
1425 struct ceph_timespec modified;
1426 s32 len;
1427 u64 pool;
1428 __s64 new_pool_max;
1429 __s32 new_flags, max;
1430 void *start = *p;
1431 int err;
1432 u8 struct_v;
1433
1434 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1435
1436 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1437 if (err)
1438 goto bad;
1439
1440 /* fsid, epoch, modified, new_pool_max, new_flags */
1441 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1442 sizeof(u64) + sizeof(u32), e_inval);
1443 ceph_decode_copy(p, &fsid, sizeof(fsid));
1444 epoch = ceph_decode_32(p);
1445 BUG_ON(epoch != map->epoch+1);
1446 ceph_decode_copy(p, &modified, sizeof(modified));
1447 new_pool_max = ceph_decode_64(p);
1448 new_flags = ceph_decode_32(p);
1449
1450 /* full map? */
1451 ceph_decode_32_safe(p, end, len, e_inval);
1452 if (len > 0) {
1453 dout("apply_incremental full map len %d, %p to %p\n",
1454 len, *p, end);
1455 return ceph_osdmap_decode(p, min(*p+len, end));
1456 }
1457
1458 /* new crush? */
1459 ceph_decode_32_safe(p, end, len, e_inval);
1460 if (len > 0) {
1461 err = osdmap_set_crush(map,
1462 crush_decode(*p, min(*p + len, end)));
1463 if (err)
1464 goto bad;
1465 *p += len;
1466 }
1467
1468 /* new flags? */
1469 if (new_flags >= 0)
1470 map->flags = new_flags;
1471 if (new_pool_max >= 0)
1472 map->pool_max = new_pool_max;
1473
1474 /* new max? */
1475 ceph_decode_32_safe(p, end, max, e_inval);
1476 if (max >= 0) {
1477 err = osdmap_set_max_osd(map, max);
1478 if (err)
1479 goto bad;
1480 }
1481
1482 map->epoch++;
1483 map->modified = modified;
1484
1485 /* new_pools */
1486 err = decode_new_pools(p, end, map);
1487 if (err)
1488 goto bad;
1489
1490 /* new_pool_names */
1491 err = decode_pool_names(p, end, map);
1492 if (err)
1493 goto bad;
1494
1495 /* old_pool */
1496 ceph_decode_32_safe(p, end, len, e_inval);
1497 while (len--) {
1498 struct ceph_pg_pool_info *pi;
1499
1500 ceph_decode_64_safe(p, end, pool, e_inval);
1501 pi = __lookup_pg_pool(&map->pg_pools, pool);
1502 if (pi)
1503 __remove_pg_pool(&map->pg_pools, pi);
1504 }
1505
1506 /* new_up_client, new_state, new_weight */
1507 err = decode_new_up_state_weight(p, end, map);
1508 if (err)
1509 goto bad;
1510
1511 /* new_pg_temp */
1512 err = decode_new_pg_temp(p, end, map);
1513 if (err)
1514 goto bad;
1515
1516 /* new_primary_temp */
1517 if (struct_v >= 1) {
1518 err = decode_new_primary_temp(p, end, map);
1519 if (err)
1520 goto bad;
1521 }
1522
1523 /* new_primary_affinity */
1524 if (struct_v >= 2) {
1525 err = decode_new_primary_affinity(p, end, map);
1526 if (err)
1527 goto bad;
1528 }
1529
1530 /* ignore the rest */
1531 *p = end;
1532
1533 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1534 return map;
1535
1536 e_inval:
1537 err = -EINVAL;
1538 bad:
1539 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1540 err, epoch, (int)(*p - start), *p, start, end);
1541 print_hex_dump(KERN_DEBUG, "osdmap: ",
1542 DUMP_PREFIX_OFFSET, 16, 1,
1543 start, end - start, true);
1544 return ERR_PTR(err);
1545 }
1546
1547 void ceph_oloc_copy(struct ceph_object_locator *dest,
1548 const struct ceph_object_locator *src)
1549 {
1550 ceph_oloc_destroy(dest);
1551
1552 dest->pool = src->pool;
1553 if (src->pool_ns)
1554 dest->pool_ns = ceph_get_string(src->pool_ns);
1555 else
1556 dest->pool_ns = NULL;
1557 }
1558 EXPORT_SYMBOL(ceph_oloc_copy);
1559
1560 void ceph_oloc_destroy(struct ceph_object_locator *oloc)
1561 {
1562 ceph_put_string(oloc->pool_ns);
1563 }
1564 EXPORT_SYMBOL(ceph_oloc_destroy);
1565
1566 void ceph_oid_copy(struct ceph_object_id *dest,
1567 const struct ceph_object_id *src)
1568 {
1569 ceph_oid_destroy(dest);
1570
1571 if (src->name != src->inline_name) {
1572 /* very rare, see ceph_object_id definition */
1573 dest->name = kmalloc(src->name_len + 1,
1574 GFP_NOIO | __GFP_NOFAIL);
1575 } else {
1576 dest->name = dest->inline_name;
1577 }
1578 memcpy(dest->name, src->name, src->name_len + 1);
1579 dest->name_len = src->name_len;
1580 }
1581 EXPORT_SYMBOL(ceph_oid_copy);
1582
1583 static __printf(2, 0)
1584 int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1585 {
1586 int len;
1587
1588 WARN_ON(!ceph_oid_empty(oid));
1589
1590 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1591 if (len >= sizeof(oid->inline_name))
1592 return len;
1593
1594 oid->name_len = len;
1595 return 0;
1596 }
1597
1598 /*
1599 * If oid doesn't fit into inline buffer, BUG.
1600 */
1601 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1602 {
1603 va_list ap;
1604
1605 va_start(ap, fmt);
1606 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1607 va_end(ap);
1608 }
1609 EXPORT_SYMBOL(ceph_oid_printf);
1610
1611 static __printf(3, 0)
1612 int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1613 const char *fmt, va_list ap)
1614 {
1615 va_list aq;
1616 int len;
1617
1618 va_copy(aq, ap);
1619 len = oid_printf_vargs(oid, fmt, aq);
1620 va_end(aq);
1621
1622 if (len) {
1623 char *external_name;
1624
1625 external_name = kmalloc(len + 1, gfp);
1626 if (!external_name)
1627 return -ENOMEM;
1628
1629 oid->name = external_name;
1630 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1631 oid->name_len = len;
1632 }
1633
1634 return 0;
1635 }
1636
1637 /*
1638 * If oid doesn't fit into inline buffer, allocate.
1639 */
1640 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1641 const char *fmt, ...)
1642 {
1643 va_list ap;
1644 int ret;
1645
1646 va_start(ap, fmt);
1647 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1648 va_end(ap);
1649
1650 return ret;
1651 }
1652 EXPORT_SYMBOL(ceph_oid_aprintf);
1653
1654 void ceph_oid_destroy(struct ceph_object_id *oid)
1655 {
1656 if (oid->name != oid->inline_name)
1657 kfree(oid->name);
1658 }
1659 EXPORT_SYMBOL(ceph_oid_destroy);
1660
1661 /*
1662 * osds only
1663 */
1664 static bool __osds_equal(const struct ceph_osds *lhs,
1665 const struct ceph_osds *rhs)
1666 {
1667 if (lhs->size == rhs->size &&
1668 !memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
1669 return true;
1670
1671 return false;
1672 }
1673
1674 /*
1675 * osds + primary
1676 */
1677 static bool osds_equal(const struct ceph_osds *lhs,
1678 const struct ceph_osds *rhs)
1679 {
1680 if (__osds_equal(lhs, rhs) &&
1681 lhs->primary == rhs->primary)
1682 return true;
1683
1684 return false;
1685 }
1686
1687 static bool osds_valid(const struct ceph_osds *set)
1688 {
1689 /* non-empty set */
1690 if (set->size > 0 && set->primary >= 0)
1691 return true;
1692
1693 /* empty can_shift_osds set */
1694 if (!set->size && set->primary == -1)
1695 return true;
1696
1697 /* empty !can_shift_osds set - all NONE */
1698 if (set->size > 0 && set->primary == -1) {
1699 int i;
1700
1701 for (i = 0; i < set->size; i++) {
1702 if (set->osds[i] != CRUSH_ITEM_NONE)
1703 break;
1704 }
1705 if (i == set->size)
1706 return true;
1707 }
1708
1709 return false;
1710 }
1711
1712 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
1713 {
1714 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
1715 dest->size = src->size;
1716 dest->primary = src->primary;
1717 }
1718
1719 static bool is_split(const struct ceph_pg *pgid,
1720 u32 old_pg_num,
1721 u32 new_pg_num)
1722 {
1723 int old_bits = calc_bits_of(old_pg_num);
1724 int old_mask = (1 << old_bits) - 1;
1725 int n;
1726
1727 WARN_ON(pgid->seed >= old_pg_num);
1728 if (new_pg_num <= old_pg_num)
1729 return false;
1730
1731 for (n = 1; ; n++) {
1732 int next_bit = n << (old_bits - 1);
1733 u32 s = next_bit | pgid->seed;
1734
1735 if (s < old_pg_num || s == pgid->seed)
1736 continue;
1737 if (s >= new_pg_num)
1738 break;
1739
1740 s = ceph_stable_mod(s, old_pg_num, old_mask);
1741 if (s == pgid->seed)
1742 return true;
1743 }
1744
1745 return false;
1746 }
1747
1748 bool ceph_is_new_interval(const struct ceph_osds *old_acting,
1749 const struct ceph_osds *new_acting,
1750 const struct ceph_osds *old_up,
1751 const struct ceph_osds *new_up,
1752 int old_size,
1753 int new_size,
1754 int old_min_size,
1755 int new_min_size,
1756 u32 old_pg_num,
1757 u32 new_pg_num,
1758 bool old_sort_bitwise,
1759 bool new_sort_bitwise,
1760 const struct ceph_pg *pgid)
1761 {
1762 return !osds_equal(old_acting, new_acting) ||
1763 !osds_equal(old_up, new_up) ||
1764 old_size != new_size ||
1765 old_min_size != new_min_size ||
1766 is_split(pgid, old_pg_num, new_pg_num) ||
1767 old_sort_bitwise != new_sort_bitwise;
1768 }
1769
1770 static int calc_pg_rank(int osd, const struct ceph_osds *acting)
1771 {
1772 int i;
1773
1774 for (i = 0; i < acting->size; i++) {
1775 if (acting->osds[i] == osd)
1776 return i;
1777 }
1778
1779 return -1;
1780 }
1781
1782 static bool primary_changed(const struct ceph_osds *old_acting,
1783 const struct ceph_osds *new_acting)
1784 {
1785 if (!old_acting->size && !new_acting->size)
1786 return false; /* both still empty */
1787
1788 if (!old_acting->size ^ !new_acting->size)
1789 return true; /* was empty, now not, or vice versa */
1790
1791 if (old_acting->primary != new_acting->primary)
1792 return true; /* primary changed */
1793
1794 if (calc_pg_rank(old_acting->primary, old_acting) !=
1795 calc_pg_rank(new_acting->primary, new_acting))
1796 return true;
1797
1798 return false; /* same primary (tho replicas may have changed) */
1799 }
1800
1801 bool ceph_osds_changed(const struct ceph_osds *old_acting,
1802 const struct ceph_osds *new_acting,
1803 bool any_change)
1804 {
1805 if (primary_changed(old_acting, new_acting))
1806 return true;
1807
1808 if (any_change && !__osds_equal(old_acting, new_acting))
1809 return true;
1810
1811 return false;
1812 }
1813
1814 /*
1815 * calculate file layout from given offset, length.
1816 * fill in correct oid, logical length, and object extent
1817 * offset, length.
1818 *
1819 * for now, we write only a single su, until we can
1820 * pass a stride back to the caller.
1821 */
1822 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
1823 u64 off, u64 len,
1824 u64 *ono,
1825 u64 *oxoff, u64 *oxlen)
1826 {
1827 u32 osize = layout->object_size;
1828 u32 su = layout->stripe_unit;
1829 u32 sc = layout->stripe_count;
1830 u32 bl, stripeno, stripepos, objsetno;
1831 u32 su_per_object;
1832 u64 t, su_offset;
1833
1834 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
1835 osize, su);
1836 if (su == 0 || sc == 0)
1837 goto invalid;
1838 su_per_object = osize / su;
1839 if (su_per_object == 0)
1840 goto invalid;
1841 dout("osize %u / su %u = su_per_object %u\n", osize, su,
1842 su_per_object);
1843
1844 if ((su & ~PAGE_MASK) != 0)
1845 goto invalid;
1846
1847 /* bl = *off / su; */
1848 t = off;
1849 do_div(t, su);
1850 bl = t;
1851 dout("off %llu / su %u = bl %u\n", off, su, bl);
1852
1853 stripeno = bl / sc;
1854 stripepos = bl % sc;
1855 objsetno = stripeno / su_per_object;
1856
1857 *ono = objsetno * sc + stripepos;
1858 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
1859
1860 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
1861 t = off;
1862 su_offset = do_div(t, su);
1863 *oxoff = su_offset + (stripeno % su_per_object) * su;
1864
1865 /*
1866 * Calculate the length of the extent being written to the selected
1867 * object. This is the minimum of the full length requested (len) or
1868 * the remainder of the current stripe being written to.
1869 */
1870 *oxlen = min_t(u64, len, su - su_offset);
1871
1872 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
1873 return 0;
1874
1875 invalid:
1876 dout(" invalid layout\n");
1877 *ono = 0;
1878 *oxoff = 0;
1879 *oxlen = 0;
1880 return -EINVAL;
1881 }
1882 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
1883
1884 /*
1885 * Map an object into a PG.
1886 *
1887 * Should only be called with target_oid and target_oloc (as opposed to
1888 * base_oid and base_oloc), since tiering isn't taken into account.
1889 */
1890 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
1891 struct ceph_object_id *oid,
1892 struct ceph_object_locator *oloc,
1893 struct ceph_pg *raw_pgid)
1894 {
1895 struct ceph_pg_pool_info *pi;
1896
1897 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
1898 if (!pi)
1899 return -ENOENT;
1900
1901 if (!oloc->pool_ns) {
1902 raw_pgid->pool = oloc->pool;
1903 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
1904 oid->name_len);
1905 dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
1906 raw_pgid->pool, raw_pgid->seed);
1907 } else {
1908 char stack_buf[256];
1909 char *buf = stack_buf;
1910 int nsl = oloc->pool_ns->len;
1911 size_t total = nsl + 1 + oid->name_len;
1912
1913 if (total > sizeof(stack_buf)) {
1914 buf = kmalloc(total, GFP_NOIO);
1915 if (!buf)
1916 return -ENOMEM;
1917 }
1918 memcpy(buf, oloc->pool_ns->str, nsl);
1919 buf[nsl] = '\037';
1920 memcpy(buf + nsl + 1, oid->name, oid->name_len);
1921 raw_pgid->pool = oloc->pool;
1922 raw_pgid->seed = ceph_str_hash(pi->object_hash, buf, total);
1923 if (buf != stack_buf)
1924 kfree(buf);
1925 dout("%s %s ns %.*s -> raw_pgid %llu.%x\n", __func__,
1926 oid->name, nsl, oloc->pool_ns->str,
1927 raw_pgid->pool, raw_pgid->seed);
1928 }
1929 return 0;
1930 }
1931 EXPORT_SYMBOL(ceph_object_locator_to_pg);
1932
1933 /*
1934 * Map a raw PG (full precision ps) into an actual PG.
1935 */
1936 static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
1937 const struct ceph_pg *raw_pgid,
1938 struct ceph_pg *pgid)
1939 {
1940 pgid->pool = raw_pgid->pool;
1941 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
1942 pi->pg_num_mask);
1943 }
1944
1945 /*
1946 * Map a raw PG (full precision ps) into a placement ps (placement
1947 * seed). Include pool id in that value so that different pools don't
1948 * use the same seeds.
1949 */
1950 static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
1951 const struct ceph_pg *raw_pgid)
1952 {
1953 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
1954 /* hash pool id and seed so that pool PGs do not overlap */
1955 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
1956 ceph_stable_mod(raw_pgid->seed,
1957 pi->pgp_num,
1958 pi->pgp_num_mask),
1959 raw_pgid->pool);
1960 } else {
1961 /*
1962 * legacy behavior: add ps and pool together. this is
1963 * not a great approach because the PGs from each pool
1964 * will overlap on top of each other: 0.5 == 1.4 ==
1965 * 2.3 == ...
1966 */
1967 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
1968 pi->pgp_num_mask) +
1969 (unsigned)raw_pgid->pool;
1970 }
1971 }
1972
1973 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
1974 int *result, int result_max,
1975 const __u32 *weight, int weight_max)
1976 {
1977 int r;
1978
1979 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
1980
1981 mutex_lock(&map->crush_workspace_mutex);
1982 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
1983 weight, weight_max, map->crush_workspace);
1984 mutex_unlock(&map->crush_workspace_mutex);
1985
1986 return r;
1987 }
1988
1989 /*
1990 * Calculate raw set (CRUSH output) for given PG. The result may
1991 * contain nonexistent OSDs. ->primary is undefined for a raw set.
1992 *
1993 * Placement seed (CRUSH input) is returned through @ppps.
1994 */
1995 static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
1996 struct ceph_pg_pool_info *pi,
1997 const struct ceph_pg *raw_pgid,
1998 struct ceph_osds *raw,
1999 u32 *ppps)
2000 {
2001 u32 pps = raw_pg_to_pps(pi, raw_pgid);
2002 int ruleno;
2003 int len;
2004
2005 ceph_osds_init(raw);
2006 if (ppps)
2007 *ppps = pps;
2008
2009 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
2010 pi->size);
2011 if (ruleno < 0) {
2012 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
2013 pi->id, pi->crush_ruleset, pi->type, pi->size);
2014 return;
2015 }
2016
2017 if (pi->size > ARRAY_SIZE(raw->osds)) {
2018 pr_err_ratelimited("pool %lld ruleset %d type %d too wide: size %d > %zu\n",
2019 pi->id, pi->crush_ruleset, pi->type, pi->size,
2020 ARRAY_SIZE(raw->osds));
2021 return;
2022 }
2023
2024 len = do_crush(osdmap, ruleno, pps, raw->osds, pi->size,
2025 osdmap->osd_weight, osdmap->max_osd);
2026 if (len < 0) {
2027 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
2028 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
2029 pi->size);
2030 return;
2031 }
2032
2033 raw->size = len;
2034 }
2035
2036 /*
2037 * Given raw set, calculate up set and up primary. By definition of an
2038 * up set, the result won't contain nonexistent or down OSDs.
2039 *
2040 * This is done in-place - on return @set is the up set. If it's
2041 * empty, ->primary will remain undefined.
2042 */
2043 static void raw_to_up_osds(struct ceph_osdmap *osdmap,
2044 struct ceph_pg_pool_info *pi,
2045 struct ceph_osds *set)
2046 {
2047 int i;
2048
2049 /* ->primary is undefined for a raw set */
2050 BUG_ON(set->primary != -1);
2051
2052 if (ceph_can_shift_osds(pi)) {
2053 int removed = 0;
2054
2055 /* shift left */
2056 for (i = 0; i < set->size; i++) {
2057 if (ceph_osd_is_down(osdmap, set->osds[i])) {
2058 removed++;
2059 continue;
2060 }
2061 if (removed)
2062 set->osds[i - removed] = set->osds[i];
2063 }
2064 set->size -= removed;
2065 if (set->size > 0)
2066 set->primary = set->osds[0];
2067 } else {
2068 /* set down/dne devices to NONE */
2069 for (i = set->size - 1; i >= 0; i--) {
2070 if (ceph_osd_is_down(osdmap, set->osds[i]))
2071 set->osds[i] = CRUSH_ITEM_NONE;
2072 else
2073 set->primary = set->osds[i];
2074 }
2075 }
2076 }
2077
2078 static void apply_primary_affinity(struct ceph_osdmap *osdmap,
2079 struct ceph_pg_pool_info *pi,
2080 u32 pps,
2081 struct ceph_osds *up)
2082 {
2083 int i;
2084 int pos = -1;
2085
2086 /*
2087 * Do we have any non-default primary_affinity values for these
2088 * osds?
2089 */
2090 if (!osdmap->osd_primary_affinity)
2091 return;
2092
2093 for (i = 0; i < up->size; i++) {
2094 int osd = up->osds[i];
2095
2096 if (osd != CRUSH_ITEM_NONE &&
2097 osdmap->osd_primary_affinity[osd] !=
2098 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
2099 break;
2100 }
2101 }
2102 if (i == up->size)
2103 return;
2104
2105 /*
2106 * Pick the primary. Feed both the seed (for the pg) and the
2107 * osd into the hash/rng so that a proportional fraction of an
2108 * osd's pgs get rejected as primary.
2109 */
2110 for (i = 0; i < up->size; i++) {
2111 int osd = up->osds[i];
2112 u32 aff;
2113
2114 if (osd == CRUSH_ITEM_NONE)
2115 continue;
2116
2117 aff = osdmap->osd_primary_affinity[osd];
2118 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
2119 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
2120 pps, osd) >> 16) >= aff) {
2121 /*
2122 * We chose not to use this primary. Note it
2123 * anyway as a fallback in case we don't pick
2124 * anyone else, but keep looking.
2125 */
2126 if (pos < 0)
2127 pos = i;
2128 } else {
2129 pos = i;
2130 break;
2131 }
2132 }
2133 if (pos < 0)
2134 return;
2135
2136 up->primary = up->osds[pos];
2137
2138 if (ceph_can_shift_osds(pi) && pos > 0) {
2139 /* move the new primary to the front */
2140 for (i = pos; i > 0; i--)
2141 up->osds[i] = up->osds[i - 1];
2142 up->osds[0] = up->primary;
2143 }
2144 }
2145
2146 /*
2147 * Get pg_temp and primary_temp mappings for given PG.
2148 *
2149 * Note that a PG may have none, only pg_temp, only primary_temp or
2150 * both pg_temp and primary_temp mappings. This means @temp isn't
2151 * always a valid OSD set on return: in the "only primary_temp" case,
2152 * @temp will have its ->primary >= 0 but ->size == 0.
2153 */
2154 static void get_temp_osds(struct ceph_osdmap *osdmap,
2155 struct ceph_pg_pool_info *pi,
2156 const struct ceph_pg *raw_pgid,
2157 struct ceph_osds *temp)
2158 {
2159 struct ceph_pg pgid;
2160 struct ceph_pg_mapping *pg;
2161 int i;
2162
2163 raw_pg_to_pg(pi, raw_pgid, &pgid);
2164 ceph_osds_init(temp);
2165
2166 /* pg_temp? */
2167 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
2168 if (pg) {
2169 for (i = 0; i < pg->pg_temp.len; i++) {
2170 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2171 if (ceph_can_shift_osds(pi))
2172 continue;
2173
2174 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
2175 } else {
2176 temp->osds[temp->size++] = pg->pg_temp.osds[i];
2177 }
2178 }
2179
2180 /* apply pg_temp's primary */
2181 for (i = 0; i < temp->size; i++) {
2182 if (temp->osds[i] != CRUSH_ITEM_NONE) {
2183 temp->primary = temp->osds[i];
2184 break;
2185 }
2186 }
2187 }
2188
2189 /* primary_temp? */
2190 pg = __lookup_pg_mapping(&osdmap->primary_temp, pgid);
2191 if (pg)
2192 temp->primary = pg->primary_temp.osd;
2193 }
2194
2195 /*
2196 * Map a PG to its acting set as well as its up set.
2197 *
2198 * Acting set is used for data mapping purposes, while up set can be
2199 * recorded for detecting interval changes and deciding whether to
2200 * resend a request.
2201 */
2202 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
2203 const struct ceph_pg *raw_pgid,
2204 struct ceph_osds *up,
2205 struct ceph_osds *acting)
2206 {
2207 struct ceph_pg_pool_info *pi;
2208 u32 pps;
2209
2210 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
2211 if (!pi) {
2212 ceph_osds_init(up);
2213 ceph_osds_init(acting);
2214 goto out;
2215 }
2216
2217 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
2218 raw_to_up_osds(osdmap, pi, up);
2219 apply_primary_affinity(osdmap, pi, pps, up);
2220 get_temp_osds(osdmap, pi, raw_pgid, acting);
2221 if (!acting->size) {
2222 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
2223 acting->size = up->size;
2224 if (acting->primary == -1)
2225 acting->primary = up->primary;
2226 }
2227 out:
2228 WARN_ON(!osds_valid(up) || !osds_valid(acting));
2229 }
2230
2231 /*
2232 * Return acting primary for given PG, or -1 if none.
2233 */
2234 int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
2235 const struct ceph_pg *raw_pgid)
2236 {
2237 struct ceph_osds up, acting;
2238
2239 ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
2240 return acting.primary;
2241 }
2242 EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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