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iio: imu: inv_mpu6050: test whoami first and against all known values
[mirror_ubuntu-artful-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 ceph_decode_32_safe(p, end, yes, bad);
321 if (!yes) {
322 dout("crush_decode NO rule %d off %x %p to %p\n",
323 i, (int)(*p-start), *p, end);
324 c->rules[i] = NULL;
325 continue;
326 }
327
328 dout("crush_decode rule %d off %x %p to %p\n",
329 i, (int)(*p-start), *p, end);
330
331 /* len */
332 ceph_decode_32_safe(p, end, yes, bad);
333 #if BITS_PER_LONG == 32
334 err = -EINVAL;
335 if (yes > (ULONG_MAX - sizeof(*r))
336 / sizeof(struct crush_rule_step))
337 goto bad;
338 #endif
339 r = c->rules[i] = kmalloc(sizeof(*r) +
340 yes*sizeof(struct crush_rule_step),
341 GFP_NOFS);
342 if (r == NULL)
343 goto badmem;
344 dout(" rule %d is at %p\n", i, r);
345 r->len = yes;
346 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
347 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
348 for (j = 0; j < r->len; j++) {
349 r->steps[j].op = ceph_decode_32(p);
350 r->steps[j].arg1 = ceph_decode_32(p);
351 r->steps[j].arg2 = ceph_decode_32(p);
352 }
353 }
354
355 /* ignore trailing name maps. */
356 for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) {
357 err = skip_name_map(p, end);
358 if (err < 0)
359 goto done;
360 }
361
362 /* tunables */
363 ceph_decode_need(p, end, 3*sizeof(u32), done);
364 c->choose_local_tries = ceph_decode_32(p);
365 c->choose_local_fallback_tries = ceph_decode_32(p);
366 c->choose_total_tries = ceph_decode_32(p);
367 dout("crush decode tunable choose_local_tries = %d\n",
368 c->choose_local_tries);
369 dout("crush decode tunable choose_local_fallback_tries = %d\n",
370 c->choose_local_fallback_tries);
371 dout("crush decode tunable choose_total_tries = %d\n",
372 c->choose_total_tries);
373
374 ceph_decode_need(p, end, sizeof(u32), done);
375 c->chooseleaf_descend_once = ceph_decode_32(p);
376 dout("crush decode tunable chooseleaf_descend_once = %d\n",
377 c->chooseleaf_descend_once);
378
379 ceph_decode_need(p, end, sizeof(u8), done);
380 c->chooseleaf_vary_r = ceph_decode_8(p);
381 dout("crush decode tunable chooseleaf_vary_r = %d\n",
382 c->chooseleaf_vary_r);
383
384 /* skip straw_calc_version, allowed_bucket_algs */
385 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
386 *p += sizeof(u8) + sizeof(u32);
387
388 ceph_decode_need(p, end, sizeof(u8), done);
389 c->chooseleaf_stable = ceph_decode_8(p);
390 dout("crush decode tunable chooseleaf_stable = %d\n",
391 c->chooseleaf_stable);
392
393 done:
394 crush_finalize(c);
395 dout("crush_decode success\n");
396 return c;
397
398 badmem:
399 err = -ENOMEM;
400 bad:
401 dout("crush_decode fail %d\n", err);
402 crush_destroy(c);
403 return ERR_PTR(err);
404 }
405
406 int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
407 {
408 if (lhs->pool < rhs->pool)
409 return -1;
410 if (lhs->pool > rhs->pool)
411 return 1;
412 if (lhs->seed < rhs->seed)
413 return -1;
414 if (lhs->seed > rhs->seed)
415 return 1;
416
417 return 0;
418 }
419
420 /*
421 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
422 * to a set of osds) and primary_temp (explicit primary setting)
423 */
424 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
425 struct rb_root *root)
426 {
427 struct rb_node **p = &root->rb_node;
428 struct rb_node *parent = NULL;
429 struct ceph_pg_mapping *pg = NULL;
430 int c;
431
432 dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
433 while (*p) {
434 parent = *p;
435 pg = rb_entry(parent, struct ceph_pg_mapping, node);
436 c = ceph_pg_compare(&new->pgid, &pg->pgid);
437 if (c < 0)
438 p = &(*p)->rb_left;
439 else if (c > 0)
440 p = &(*p)->rb_right;
441 else
442 return -EEXIST;
443 }
444
445 rb_link_node(&new->node, parent, p);
446 rb_insert_color(&new->node, root);
447 return 0;
448 }
449
450 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
451 struct ceph_pg pgid)
452 {
453 struct rb_node *n = root->rb_node;
454 struct ceph_pg_mapping *pg;
455 int c;
456
457 while (n) {
458 pg = rb_entry(n, struct ceph_pg_mapping, node);
459 c = ceph_pg_compare(&pgid, &pg->pgid);
460 if (c < 0) {
461 n = n->rb_left;
462 } else if (c > 0) {
463 n = n->rb_right;
464 } else {
465 dout("__lookup_pg_mapping %lld.%x got %p\n",
466 pgid.pool, pgid.seed, pg);
467 return pg;
468 }
469 }
470 return NULL;
471 }
472
473 static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
474 {
475 struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
476
477 if (pg) {
478 dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
479 pg);
480 rb_erase(&pg->node, root);
481 kfree(pg);
482 return 0;
483 }
484 dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
485 return -ENOENT;
486 }
487
488 /*
489 * rbtree of pg pool info
490 */
491 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
492 {
493 struct rb_node **p = &root->rb_node;
494 struct rb_node *parent = NULL;
495 struct ceph_pg_pool_info *pi = NULL;
496
497 while (*p) {
498 parent = *p;
499 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
500 if (new->id < pi->id)
501 p = &(*p)->rb_left;
502 else if (new->id > pi->id)
503 p = &(*p)->rb_right;
504 else
505 return -EEXIST;
506 }
507
508 rb_link_node(&new->node, parent, p);
509 rb_insert_color(&new->node, root);
510 return 0;
511 }
512
513 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
514 {
515 struct ceph_pg_pool_info *pi;
516 struct rb_node *n = root->rb_node;
517
518 while (n) {
519 pi = rb_entry(n, struct ceph_pg_pool_info, node);
520 if (id < pi->id)
521 n = n->rb_left;
522 else if (id > pi->id)
523 n = n->rb_right;
524 else
525 return pi;
526 }
527 return NULL;
528 }
529
530 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
531 {
532 return __lookup_pg_pool(&map->pg_pools, id);
533 }
534
535 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
536 {
537 struct ceph_pg_pool_info *pi;
538
539 if (id == CEPH_NOPOOL)
540 return NULL;
541
542 if (WARN_ON_ONCE(id > (u64) INT_MAX))
543 return NULL;
544
545 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
546
547 return pi ? pi->name : NULL;
548 }
549 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
550
551 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
552 {
553 struct rb_node *rbp;
554
555 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
556 struct ceph_pg_pool_info *pi =
557 rb_entry(rbp, struct ceph_pg_pool_info, node);
558 if (pi->name && strcmp(pi->name, name) == 0)
559 return pi->id;
560 }
561 return -ENOENT;
562 }
563 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
564
565 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
566 {
567 rb_erase(&pi->node, root);
568 kfree(pi->name);
569 kfree(pi);
570 }
571
572 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
573 {
574 u8 ev, cv;
575 unsigned len, num;
576 void *pool_end;
577
578 ceph_decode_need(p, end, 2 + 4, bad);
579 ev = ceph_decode_8(p); /* encoding version */
580 cv = ceph_decode_8(p); /* compat version */
581 if (ev < 5) {
582 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
583 return -EINVAL;
584 }
585 if (cv > 9) {
586 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
587 return -EINVAL;
588 }
589 len = ceph_decode_32(p);
590 ceph_decode_need(p, end, len, bad);
591 pool_end = *p + len;
592
593 pi->type = ceph_decode_8(p);
594 pi->size = ceph_decode_8(p);
595 pi->crush_ruleset = ceph_decode_8(p);
596 pi->object_hash = ceph_decode_8(p);
597
598 pi->pg_num = ceph_decode_32(p);
599 pi->pgp_num = ceph_decode_32(p);
600
601 *p += 4 + 4; /* skip lpg* */
602 *p += 4; /* skip last_change */
603 *p += 8 + 4; /* skip snap_seq, snap_epoch */
604
605 /* skip snaps */
606 num = ceph_decode_32(p);
607 while (num--) {
608 *p += 8; /* snapid key */
609 *p += 1 + 1; /* versions */
610 len = ceph_decode_32(p);
611 *p += len;
612 }
613
614 /* skip removed_snaps */
615 num = ceph_decode_32(p);
616 *p += num * (8 + 8);
617
618 *p += 8; /* skip auid */
619 pi->flags = ceph_decode_64(p);
620 *p += 4; /* skip crash_replay_interval */
621
622 if (ev >= 7)
623 pi->min_size = ceph_decode_8(p);
624 else
625 pi->min_size = pi->size - pi->size / 2;
626
627 if (ev >= 8)
628 *p += 8 + 8; /* skip quota_max_* */
629
630 if (ev >= 9) {
631 /* skip tiers */
632 num = ceph_decode_32(p);
633 *p += num * 8;
634
635 *p += 8; /* skip tier_of */
636 *p += 1; /* skip cache_mode */
637
638 pi->read_tier = ceph_decode_64(p);
639 pi->write_tier = ceph_decode_64(p);
640 } else {
641 pi->read_tier = -1;
642 pi->write_tier = -1;
643 }
644
645 if (ev >= 10) {
646 /* skip properties */
647 num = ceph_decode_32(p);
648 while (num--) {
649 len = ceph_decode_32(p);
650 *p += len; /* key */
651 len = ceph_decode_32(p);
652 *p += len; /* val */
653 }
654 }
655
656 if (ev >= 11) {
657 /* skip hit_set_params */
658 *p += 1 + 1; /* versions */
659 len = ceph_decode_32(p);
660 *p += len;
661
662 *p += 4; /* skip hit_set_period */
663 *p += 4; /* skip hit_set_count */
664 }
665
666 if (ev >= 12)
667 *p += 4; /* skip stripe_width */
668
669 if (ev >= 13) {
670 *p += 8; /* skip target_max_bytes */
671 *p += 8; /* skip target_max_objects */
672 *p += 4; /* skip cache_target_dirty_ratio_micro */
673 *p += 4; /* skip cache_target_full_ratio_micro */
674 *p += 4; /* skip cache_min_flush_age */
675 *p += 4; /* skip cache_min_evict_age */
676 }
677
678 if (ev >= 14) {
679 /* skip erasure_code_profile */
680 len = ceph_decode_32(p);
681 *p += len;
682 }
683
684 if (ev >= 15)
685 pi->last_force_request_resend = ceph_decode_32(p);
686 else
687 pi->last_force_request_resend = 0;
688
689 /* ignore the rest */
690
691 *p = pool_end;
692 calc_pg_masks(pi);
693 return 0;
694
695 bad:
696 return -EINVAL;
697 }
698
699 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
700 {
701 struct ceph_pg_pool_info *pi;
702 u32 num, len;
703 u64 pool;
704
705 ceph_decode_32_safe(p, end, num, bad);
706 dout(" %d pool names\n", num);
707 while (num--) {
708 ceph_decode_64_safe(p, end, pool, bad);
709 ceph_decode_32_safe(p, end, len, bad);
710 dout(" pool %llu len %d\n", pool, len);
711 ceph_decode_need(p, end, len, bad);
712 pi = __lookup_pg_pool(&map->pg_pools, pool);
713 if (pi) {
714 char *name = kstrndup(*p, len, GFP_NOFS);
715
716 if (!name)
717 return -ENOMEM;
718 kfree(pi->name);
719 pi->name = name;
720 dout(" name is %s\n", pi->name);
721 }
722 *p += len;
723 }
724 return 0;
725
726 bad:
727 return -EINVAL;
728 }
729
730 /*
731 * osd map
732 */
733 struct ceph_osdmap *ceph_osdmap_alloc(void)
734 {
735 struct ceph_osdmap *map;
736
737 map = kzalloc(sizeof(*map), GFP_NOIO);
738 if (!map)
739 return NULL;
740
741 map->pg_pools = RB_ROOT;
742 map->pool_max = -1;
743 map->pg_temp = RB_ROOT;
744 map->primary_temp = RB_ROOT;
745 mutex_init(&map->crush_workspace_mutex);
746
747 return map;
748 }
749
750 void ceph_osdmap_destroy(struct ceph_osdmap *map)
751 {
752 dout("osdmap_destroy %p\n", map);
753 if (map->crush)
754 crush_destroy(map->crush);
755 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
756 struct ceph_pg_mapping *pg =
757 rb_entry(rb_first(&map->pg_temp),
758 struct ceph_pg_mapping, node);
759 rb_erase(&pg->node, &map->pg_temp);
760 kfree(pg);
761 }
762 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
763 struct ceph_pg_mapping *pg =
764 rb_entry(rb_first(&map->primary_temp),
765 struct ceph_pg_mapping, node);
766 rb_erase(&pg->node, &map->primary_temp);
767 kfree(pg);
768 }
769 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
770 struct ceph_pg_pool_info *pi =
771 rb_entry(rb_first(&map->pg_pools),
772 struct ceph_pg_pool_info, node);
773 __remove_pg_pool(&map->pg_pools, pi);
774 }
775 kfree(map->osd_state);
776 kfree(map->osd_weight);
777 kfree(map->osd_addr);
778 kfree(map->osd_primary_affinity);
779 kfree(map->crush_workspace);
780 kfree(map);
781 }
782
783 /*
784 * Adjust max_osd value, (re)allocate arrays.
785 *
786 * The new elements are properly initialized.
787 */
788 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
789 {
790 u8 *state;
791 u32 *weight;
792 struct ceph_entity_addr *addr;
793 int i;
794
795 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
796 if (!state)
797 return -ENOMEM;
798 map->osd_state = state;
799
800 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
801 if (!weight)
802 return -ENOMEM;
803 map->osd_weight = weight;
804
805 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
806 if (!addr)
807 return -ENOMEM;
808 map->osd_addr = addr;
809
810 for (i = map->max_osd; i < max; i++) {
811 map->osd_state[i] = 0;
812 map->osd_weight[i] = CEPH_OSD_OUT;
813 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
814 }
815
816 if (map->osd_primary_affinity) {
817 u32 *affinity;
818
819 affinity = krealloc(map->osd_primary_affinity,
820 max*sizeof(*affinity), GFP_NOFS);
821 if (!affinity)
822 return -ENOMEM;
823 map->osd_primary_affinity = affinity;
824
825 for (i = map->max_osd; i < max; i++)
826 map->osd_primary_affinity[i] =
827 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
828 }
829
830 map->max_osd = max;
831
832 return 0;
833 }
834
835 static int osdmap_set_crush(struct ceph_osdmap *map, struct crush_map *crush)
836 {
837 void *workspace;
838 size_t work_size;
839
840 if (IS_ERR(crush))
841 return PTR_ERR(crush);
842
843 work_size = crush_work_size(crush, CEPH_PG_MAX_SIZE);
844 dout("%s work_size %zu bytes\n", __func__, work_size);
845 workspace = kmalloc(work_size, GFP_NOIO);
846 if (!workspace) {
847 crush_destroy(crush);
848 return -ENOMEM;
849 }
850 crush_init_workspace(crush, workspace);
851
852 if (map->crush)
853 crush_destroy(map->crush);
854 kfree(map->crush_workspace);
855 map->crush = crush;
856 map->crush_workspace = workspace;
857 return 0;
858 }
859
860 #define OSDMAP_WRAPPER_COMPAT_VER 7
861 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
862
863 /*
864 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
865 * to struct_v of the client_data section for new (v7 and above)
866 * osdmaps.
867 */
868 static int get_osdmap_client_data_v(void **p, void *end,
869 const char *prefix, u8 *v)
870 {
871 u8 struct_v;
872
873 ceph_decode_8_safe(p, end, struct_v, e_inval);
874 if (struct_v >= 7) {
875 u8 struct_compat;
876
877 ceph_decode_8_safe(p, end, struct_compat, e_inval);
878 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
879 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
880 struct_v, struct_compat,
881 OSDMAP_WRAPPER_COMPAT_VER, prefix);
882 return -EINVAL;
883 }
884 *p += 4; /* ignore wrapper struct_len */
885
886 ceph_decode_8_safe(p, end, struct_v, e_inval);
887 ceph_decode_8_safe(p, end, struct_compat, e_inval);
888 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
889 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
890 struct_v, struct_compat,
891 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
892 return -EINVAL;
893 }
894 *p += 4; /* ignore client data struct_len */
895 } else {
896 u16 version;
897
898 *p -= 1;
899 ceph_decode_16_safe(p, end, version, e_inval);
900 if (version < 6) {
901 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
902 version, prefix);
903 return -EINVAL;
904 }
905
906 /* old osdmap enconding */
907 struct_v = 0;
908 }
909
910 *v = struct_v;
911 return 0;
912
913 e_inval:
914 return -EINVAL;
915 }
916
917 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
918 bool incremental)
919 {
920 u32 n;
921
922 ceph_decode_32_safe(p, end, n, e_inval);
923 while (n--) {
924 struct ceph_pg_pool_info *pi;
925 u64 pool;
926 int ret;
927
928 ceph_decode_64_safe(p, end, pool, e_inval);
929
930 pi = __lookup_pg_pool(&map->pg_pools, pool);
931 if (!incremental || !pi) {
932 pi = kzalloc(sizeof(*pi), GFP_NOFS);
933 if (!pi)
934 return -ENOMEM;
935
936 pi->id = pool;
937
938 ret = __insert_pg_pool(&map->pg_pools, pi);
939 if (ret) {
940 kfree(pi);
941 return ret;
942 }
943 }
944
945 ret = decode_pool(p, end, pi);
946 if (ret)
947 return ret;
948 }
949
950 return 0;
951
952 e_inval:
953 return -EINVAL;
954 }
955
956 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
957 {
958 return __decode_pools(p, end, map, false);
959 }
960
961 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
962 {
963 return __decode_pools(p, end, map, true);
964 }
965
966 static int __decode_pg_temp(void **p, void *end, struct ceph_osdmap *map,
967 bool incremental)
968 {
969 u32 n;
970
971 ceph_decode_32_safe(p, end, n, e_inval);
972 while (n--) {
973 struct ceph_pg pgid;
974 u32 len, i;
975 int ret;
976
977 ret = ceph_decode_pgid(p, end, &pgid);
978 if (ret)
979 return ret;
980
981 ceph_decode_32_safe(p, end, len, e_inval);
982
983 ret = __remove_pg_mapping(&map->pg_temp, pgid);
984 BUG_ON(!incremental && ret != -ENOENT);
985
986 if (!incremental || len > 0) {
987 struct ceph_pg_mapping *pg;
988
989 ceph_decode_need(p, end, len*sizeof(u32), e_inval);
990
991 if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
992 return -EINVAL;
993
994 pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
995 if (!pg)
996 return -ENOMEM;
997
998 pg->pgid = pgid;
999 pg->pg_temp.len = len;
1000 for (i = 0; i < len; i++)
1001 pg->pg_temp.osds[i] = ceph_decode_32(p);
1002
1003 ret = __insert_pg_mapping(pg, &map->pg_temp);
1004 if (ret) {
1005 kfree(pg);
1006 return ret;
1007 }
1008 }
1009 }
1010
1011 return 0;
1012
1013 e_inval:
1014 return -EINVAL;
1015 }
1016
1017 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1018 {
1019 return __decode_pg_temp(p, end, map, false);
1020 }
1021
1022 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1023 {
1024 return __decode_pg_temp(p, end, map, true);
1025 }
1026
1027 static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
1028 bool incremental)
1029 {
1030 u32 n;
1031
1032 ceph_decode_32_safe(p, end, n, e_inval);
1033 while (n--) {
1034 struct ceph_pg pgid;
1035 u32 osd;
1036 int ret;
1037
1038 ret = ceph_decode_pgid(p, end, &pgid);
1039 if (ret)
1040 return ret;
1041
1042 ceph_decode_32_safe(p, end, osd, e_inval);
1043
1044 ret = __remove_pg_mapping(&map->primary_temp, pgid);
1045 BUG_ON(!incremental && ret != -ENOENT);
1046
1047 if (!incremental || osd != (u32)-1) {
1048 struct ceph_pg_mapping *pg;
1049
1050 pg = kzalloc(sizeof(*pg), GFP_NOFS);
1051 if (!pg)
1052 return -ENOMEM;
1053
1054 pg->pgid = pgid;
1055 pg->primary_temp.osd = osd;
1056
1057 ret = __insert_pg_mapping(pg, &map->primary_temp);
1058 if (ret) {
1059 kfree(pg);
1060 return ret;
1061 }
1062 }
1063 }
1064
1065 return 0;
1066
1067 e_inval:
1068 return -EINVAL;
1069 }
1070
1071 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
1072 {
1073 return __decode_primary_temp(p, end, map, false);
1074 }
1075
1076 static int decode_new_primary_temp(void **p, void *end,
1077 struct ceph_osdmap *map)
1078 {
1079 return __decode_primary_temp(p, end, map, true);
1080 }
1081
1082 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
1083 {
1084 BUG_ON(osd >= map->max_osd);
1085
1086 if (!map->osd_primary_affinity)
1087 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1088
1089 return map->osd_primary_affinity[osd];
1090 }
1091
1092 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
1093 {
1094 BUG_ON(osd >= map->max_osd);
1095
1096 if (!map->osd_primary_affinity) {
1097 int i;
1098
1099 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
1100 GFP_NOFS);
1101 if (!map->osd_primary_affinity)
1102 return -ENOMEM;
1103
1104 for (i = 0; i < map->max_osd; i++)
1105 map->osd_primary_affinity[i] =
1106 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1107 }
1108
1109 map->osd_primary_affinity[osd] = aff;
1110
1111 return 0;
1112 }
1113
1114 static int decode_primary_affinity(void **p, void *end,
1115 struct ceph_osdmap *map)
1116 {
1117 u32 len, i;
1118
1119 ceph_decode_32_safe(p, end, len, e_inval);
1120 if (len == 0) {
1121 kfree(map->osd_primary_affinity);
1122 map->osd_primary_affinity = NULL;
1123 return 0;
1124 }
1125 if (len != map->max_osd)
1126 goto e_inval;
1127
1128 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1129
1130 for (i = 0; i < map->max_osd; i++) {
1131 int ret;
1132
1133 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1134 if (ret)
1135 return ret;
1136 }
1137
1138 return 0;
1139
1140 e_inval:
1141 return -EINVAL;
1142 }
1143
1144 static int decode_new_primary_affinity(void **p, void *end,
1145 struct ceph_osdmap *map)
1146 {
1147 u32 n;
1148
1149 ceph_decode_32_safe(p, end, n, e_inval);
1150 while (n--) {
1151 u32 osd, aff;
1152 int ret;
1153
1154 ceph_decode_32_safe(p, end, osd, e_inval);
1155 ceph_decode_32_safe(p, end, aff, e_inval);
1156
1157 ret = set_primary_affinity(map, osd, aff);
1158 if (ret)
1159 return ret;
1160
1161 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1162 }
1163
1164 return 0;
1165
1166 e_inval:
1167 return -EINVAL;
1168 }
1169
1170 /*
1171 * decode a full map.
1172 */
1173 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1174 {
1175 u8 struct_v;
1176 u32 epoch = 0;
1177 void *start = *p;
1178 u32 max;
1179 u32 len, i;
1180 int err;
1181
1182 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1183
1184 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1185 if (err)
1186 goto bad;
1187
1188 /* fsid, epoch, created, modified */
1189 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1190 sizeof(map->created) + sizeof(map->modified), e_inval);
1191 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1192 epoch = map->epoch = ceph_decode_32(p);
1193 ceph_decode_copy(p, &map->created, sizeof(map->created));
1194 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1195
1196 /* pools */
1197 err = decode_pools(p, end, map);
1198 if (err)
1199 goto bad;
1200
1201 /* pool_name */
1202 err = decode_pool_names(p, end, map);
1203 if (err)
1204 goto bad;
1205
1206 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1207
1208 ceph_decode_32_safe(p, end, map->flags, e_inval);
1209
1210 /* max_osd */
1211 ceph_decode_32_safe(p, end, max, e_inval);
1212
1213 /* (re)alloc osd arrays */
1214 err = osdmap_set_max_osd(map, max);
1215 if (err)
1216 goto bad;
1217
1218 /* osd_state, osd_weight, osd_addrs->client_addr */
1219 ceph_decode_need(p, end, 3*sizeof(u32) +
1220 map->max_osd*(1 + sizeof(*map->osd_weight) +
1221 sizeof(*map->osd_addr)), e_inval);
1222
1223 if (ceph_decode_32(p) != map->max_osd)
1224 goto e_inval;
1225
1226 ceph_decode_copy(p, map->osd_state, map->max_osd);
1227
1228 if (ceph_decode_32(p) != map->max_osd)
1229 goto e_inval;
1230
1231 for (i = 0; i < map->max_osd; i++)
1232 map->osd_weight[i] = ceph_decode_32(p);
1233
1234 if (ceph_decode_32(p) != map->max_osd)
1235 goto e_inval;
1236
1237 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1238 for (i = 0; i < map->max_osd; i++)
1239 ceph_decode_addr(&map->osd_addr[i]);
1240
1241 /* pg_temp */
1242 err = decode_pg_temp(p, end, map);
1243 if (err)
1244 goto bad;
1245
1246 /* primary_temp */
1247 if (struct_v >= 1) {
1248 err = decode_primary_temp(p, end, map);
1249 if (err)
1250 goto bad;
1251 }
1252
1253 /* primary_affinity */
1254 if (struct_v >= 2) {
1255 err = decode_primary_affinity(p, end, map);
1256 if (err)
1257 goto bad;
1258 } else {
1259 /* XXX can this happen? */
1260 kfree(map->osd_primary_affinity);
1261 map->osd_primary_affinity = NULL;
1262 }
1263
1264 /* crush */
1265 ceph_decode_32_safe(p, end, len, e_inval);
1266 err = osdmap_set_crush(map, crush_decode(*p, min(*p + len, end)));
1267 if (err)
1268 goto bad;
1269
1270 /* ignore the rest */
1271 *p = end;
1272
1273 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1274 return 0;
1275
1276 e_inval:
1277 err = -EINVAL;
1278 bad:
1279 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1280 err, epoch, (int)(*p - start), *p, start, end);
1281 print_hex_dump(KERN_DEBUG, "osdmap: ",
1282 DUMP_PREFIX_OFFSET, 16, 1,
1283 start, end - start, true);
1284 return err;
1285 }
1286
1287 /*
1288 * Allocate and decode a full map.
1289 */
1290 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1291 {
1292 struct ceph_osdmap *map;
1293 int ret;
1294
1295 map = ceph_osdmap_alloc();
1296 if (!map)
1297 return ERR_PTR(-ENOMEM);
1298
1299 ret = osdmap_decode(p, end, map);
1300 if (ret) {
1301 ceph_osdmap_destroy(map);
1302 return ERR_PTR(ret);
1303 }
1304
1305 return map;
1306 }
1307
1308 /*
1309 * Encoding order is (new_up_client, new_state, new_weight). Need to
1310 * apply in the (new_weight, new_state, new_up_client) order, because
1311 * an incremental map may look like e.g.
1312 *
1313 * new_up_client: { osd=6, addr=... } # set osd_state and addr
1314 * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
1315 */
1316 static int decode_new_up_state_weight(void **p, void *end,
1317 struct ceph_osdmap *map)
1318 {
1319 void *new_up_client;
1320 void *new_state;
1321 void *new_weight_end;
1322 u32 len;
1323
1324 new_up_client = *p;
1325 ceph_decode_32_safe(p, end, len, e_inval);
1326 len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
1327 ceph_decode_need(p, end, len, e_inval);
1328 *p += len;
1329
1330 new_state = *p;
1331 ceph_decode_32_safe(p, end, len, e_inval);
1332 len *= sizeof(u32) + sizeof(u8);
1333 ceph_decode_need(p, end, len, e_inval);
1334 *p += len;
1335
1336 /* new_weight */
1337 ceph_decode_32_safe(p, end, len, e_inval);
1338 while (len--) {
1339 s32 osd;
1340 u32 w;
1341
1342 ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
1343 osd = ceph_decode_32(p);
1344 w = ceph_decode_32(p);
1345 BUG_ON(osd >= map->max_osd);
1346 pr_info("osd%d weight 0x%x %s\n", osd, w,
1347 w == CEPH_OSD_IN ? "(in)" :
1348 (w == CEPH_OSD_OUT ? "(out)" : ""));
1349 map->osd_weight[osd] = w;
1350
1351 /*
1352 * If we are marking in, set the EXISTS, and clear the
1353 * AUTOOUT and NEW bits.
1354 */
1355 if (w) {
1356 map->osd_state[osd] |= CEPH_OSD_EXISTS;
1357 map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
1358 CEPH_OSD_NEW);
1359 }
1360 }
1361 new_weight_end = *p;
1362
1363 /* new_state (up/down) */
1364 *p = new_state;
1365 len = ceph_decode_32(p);
1366 while (len--) {
1367 s32 osd;
1368 u8 xorstate;
1369 int ret;
1370
1371 osd = ceph_decode_32(p);
1372 xorstate = ceph_decode_8(p);
1373 if (xorstate == 0)
1374 xorstate = CEPH_OSD_UP;
1375 BUG_ON(osd >= map->max_osd);
1376 if ((map->osd_state[osd] & CEPH_OSD_UP) &&
1377 (xorstate & CEPH_OSD_UP))
1378 pr_info("osd%d down\n", osd);
1379 if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
1380 (xorstate & CEPH_OSD_EXISTS)) {
1381 pr_info("osd%d does not exist\n", osd);
1382 ret = set_primary_affinity(map, osd,
1383 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
1384 if (ret)
1385 return ret;
1386 memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
1387 map->osd_state[osd] = 0;
1388 } else {
1389 map->osd_state[osd] ^= xorstate;
1390 }
1391 }
1392
1393 /* new_up_client */
1394 *p = new_up_client;
1395 len = ceph_decode_32(p);
1396 while (len--) {
1397 s32 osd;
1398 struct ceph_entity_addr addr;
1399
1400 osd = ceph_decode_32(p);
1401 ceph_decode_copy(p, &addr, sizeof(addr));
1402 ceph_decode_addr(&addr);
1403 BUG_ON(osd >= map->max_osd);
1404 pr_info("osd%d up\n", osd);
1405 map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
1406 map->osd_addr[osd] = addr;
1407 }
1408
1409 *p = new_weight_end;
1410 return 0;
1411
1412 e_inval:
1413 return -EINVAL;
1414 }
1415
1416 /*
1417 * decode and apply an incremental map update.
1418 */
1419 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1420 struct ceph_osdmap *map)
1421 {
1422 struct ceph_fsid fsid;
1423 u32 epoch = 0;
1424 struct ceph_timespec modified;
1425 s32 len;
1426 u64 pool;
1427 __s64 new_pool_max;
1428 __s32 new_flags, max;
1429 void *start = *p;
1430 int err;
1431 u8 struct_v;
1432
1433 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1434
1435 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1436 if (err)
1437 goto bad;
1438
1439 /* fsid, epoch, modified, new_pool_max, new_flags */
1440 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1441 sizeof(u64) + sizeof(u32), e_inval);
1442 ceph_decode_copy(p, &fsid, sizeof(fsid));
1443 epoch = ceph_decode_32(p);
1444 BUG_ON(epoch != map->epoch+1);
1445 ceph_decode_copy(p, &modified, sizeof(modified));
1446 new_pool_max = ceph_decode_64(p);
1447 new_flags = ceph_decode_32(p);
1448
1449 /* full map? */
1450 ceph_decode_32_safe(p, end, len, e_inval);
1451 if (len > 0) {
1452 dout("apply_incremental full map len %d, %p to %p\n",
1453 len, *p, end);
1454 return ceph_osdmap_decode(p, min(*p+len, end));
1455 }
1456
1457 /* new crush? */
1458 ceph_decode_32_safe(p, end, len, e_inval);
1459 if (len > 0) {
1460 err = osdmap_set_crush(map,
1461 crush_decode(*p, min(*p + len, end)));
1462 if (err)
1463 goto bad;
1464 *p += len;
1465 }
1466
1467 /* new flags? */
1468 if (new_flags >= 0)
1469 map->flags = new_flags;
1470 if (new_pool_max >= 0)
1471 map->pool_max = new_pool_max;
1472
1473 /* new max? */
1474 ceph_decode_32_safe(p, end, max, e_inval);
1475 if (max >= 0) {
1476 err = osdmap_set_max_osd(map, max);
1477 if (err)
1478 goto bad;
1479 }
1480
1481 map->epoch++;
1482 map->modified = modified;
1483
1484 /* new_pools */
1485 err = decode_new_pools(p, end, map);
1486 if (err)
1487 goto bad;
1488
1489 /* new_pool_names */
1490 err = decode_pool_names(p, end, map);
1491 if (err)
1492 goto bad;
1493
1494 /* old_pool */
1495 ceph_decode_32_safe(p, end, len, e_inval);
1496 while (len--) {
1497 struct ceph_pg_pool_info *pi;
1498
1499 ceph_decode_64_safe(p, end, pool, e_inval);
1500 pi = __lookup_pg_pool(&map->pg_pools, pool);
1501 if (pi)
1502 __remove_pg_pool(&map->pg_pools, pi);
1503 }
1504
1505 /* new_up_client, new_state, new_weight */
1506 err = decode_new_up_state_weight(p, end, map);
1507 if (err)
1508 goto bad;
1509
1510 /* new_pg_temp */
1511 err = decode_new_pg_temp(p, end, map);
1512 if (err)
1513 goto bad;
1514
1515 /* new_primary_temp */
1516 if (struct_v >= 1) {
1517 err = decode_new_primary_temp(p, end, map);
1518 if (err)
1519 goto bad;
1520 }
1521
1522 /* new_primary_affinity */
1523 if (struct_v >= 2) {
1524 err = decode_new_primary_affinity(p, end, map);
1525 if (err)
1526 goto bad;
1527 }
1528
1529 /* ignore the rest */
1530 *p = end;
1531
1532 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1533 return map;
1534
1535 e_inval:
1536 err = -EINVAL;
1537 bad:
1538 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1539 err, epoch, (int)(*p - start), *p, start, end);
1540 print_hex_dump(KERN_DEBUG, "osdmap: ",
1541 DUMP_PREFIX_OFFSET, 16, 1,
1542 start, end - start, true);
1543 return ERR_PTR(err);
1544 }
1545
1546 void ceph_oloc_copy(struct ceph_object_locator *dest,
1547 const struct ceph_object_locator *src)
1548 {
1549 WARN_ON(!ceph_oloc_empty(dest));
1550 WARN_ON(dest->pool_ns); /* empty() only covers ->pool */
1551
1552 dest->pool = src->pool;
1553 if (src->pool_ns)
1554 dest->pool_ns = ceph_get_string(src->pool_ns);
1555 }
1556 EXPORT_SYMBOL(ceph_oloc_copy);
1557
1558 void ceph_oloc_destroy(struct ceph_object_locator *oloc)
1559 {
1560 ceph_put_string(oloc->pool_ns);
1561 }
1562 EXPORT_SYMBOL(ceph_oloc_destroy);
1563
1564 void ceph_oid_copy(struct ceph_object_id *dest,
1565 const struct ceph_object_id *src)
1566 {
1567 WARN_ON(!ceph_oid_empty(dest));
1568
1569 if (src->name != src->inline_name) {
1570 /* very rare, see ceph_object_id definition */
1571 dest->name = kmalloc(src->name_len + 1,
1572 GFP_NOIO | __GFP_NOFAIL);
1573 }
1574
1575 memcpy(dest->name, src->name, src->name_len + 1);
1576 dest->name_len = src->name_len;
1577 }
1578 EXPORT_SYMBOL(ceph_oid_copy);
1579
1580 static __printf(2, 0)
1581 int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1582 {
1583 int len;
1584
1585 WARN_ON(!ceph_oid_empty(oid));
1586
1587 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1588 if (len >= sizeof(oid->inline_name))
1589 return len;
1590
1591 oid->name_len = len;
1592 return 0;
1593 }
1594
1595 /*
1596 * If oid doesn't fit into inline buffer, BUG.
1597 */
1598 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1599 {
1600 va_list ap;
1601
1602 va_start(ap, fmt);
1603 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1604 va_end(ap);
1605 }
1606 EXPORT_SYMBOL(ceph_oid_printf);
1607
1608 static __printf(3, 0)
1609 int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1610 const char *fmt, va_list ap)
1611 {
1612 va_list aq;
1613 int len;
1614
1615 va_copy(aq, ap);
1616 len = oid_printf_vargs(oid, fmt, aq);
1617 va_end(aq);
1618
1619 if (len) {
1620 char *external_name;
1621
1622 external_name = kmalloc(len + 1, gfp);
1623 if (!external_name)
1624 return -ENOMEM;
1625
1626 oid->name = external_name;
1627 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1628 oid->name_len = len;
1629 }
1630
1631 return 0;
1632 }
1633
1634 /*
1635 * If oid doesn't fit into inline buffer, allocate.
1636 */
1637 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1638 const char *fmt, ...)
1639 {
1640 va_list ap;
1641 int ret;
1642
1643 va_start(ap, fmt);
1644 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1645 va_end(ap);
1646
1647 return ret;
1648 }
1649 EXPORT_SYMBOL(ceph_oid_aprintf);
1650
1651 void ceph_oid_destroy(struct ceph_object_id *oid)
1652 {
1653 if (oid->name != oid->inline_name)
1654 kfree(oid->name);
1655 }
1656 EXPORT_SYMBOL(ceph_oid_destroy);
1657
1658 /*
1659 * osds only
1660 */
1661 static bool __osds_equal(const struct ceph_osds *lhs,
1662 const struct ceph_osds *rhs)
1663 {
1664 if (lhs->size == rhs->size &&
1665 !memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
1666 return true;
1667
1668 return false;
1669 }
1670
1671 /*
1672 * osds + primary
1673 */
1674 static bool osds_equal(const struct ceph_osds *lhs,
1675 const struct ceph_osds *rhs)
1676 {
1677 if (__osds_equal(lhs, rhs) &&
1678 lhs->primary == rhs->primary)
1679 return true;
1680
1681 return false;
1682 }
1683
1684 static bool osds_valid(const struct ceph_osds *set)
1685 {
1686 /* non-empty set */
1687 if (set->size > 0 && set->primary >= 0)
1688 return true;
1689
1690 /* empty can_shift_osds set */
1691 if (!set->size && set->primary == -1)
1692 return true;
1693
1694 /* empty !can_shift_osds set - all NONE */
1695 if (set->size > 0 && set->primary == -1) {
1696 int i;
1697
1698 for (i = 0; i < set->size; i++) {
1699 if (set->osds[i] != CRUSH_ITEM_NONE)
1700 break;
1701 }
1702 if (i == set->size)
1703 return true;
1704 }
1705
1706 return false;
1707 }
1708
1709 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
1710 {
1711 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
1712 dest->size = src->size;
1713 dest->primary = src->primary;
1714 }
1715
1716 static bool is_split(const struct ceph_pg *pgid,
1717 u32 old_pg_num,
1718 u32 new_pg_num)
1719 {
1720 int old_bits = calc_bits_of(old_pg_num);
1721 int old_mask = (1 << old_bits) - 1;
1722 int n;
1723
1724 WARN_ON(pgid->seed >= old_pg_num);
1725 if (new_pg_num <= old_pg_num)
1726 return false;
1727
1728 for (n = 1; ; n++) {
1729 int next_bit = n << (old_bits - 1);
1730 u32 s = next_bit | pgid->seed;
1731
1732 if (s < old_pg_num || s == pgid->seed)
1733 continue;
1734 if (s >= new_pg_num)
1735 break;
1736
1737 s = ceph_stable_mod(s, old_pg_num, old_mask);
1738 if (s == pgid->seed)
1739 return true;
1740 }
1741
1742 return false;
1743 }
1744
1745 bool ceph_is_new_interval(const struct ceph_osds *old_acting,
1746 const struct ceph_osds *new_acting,
1747 const struct ceph_osds *old_up,
1748 const struct ceph_osds *new_up,
1749 int old_size,
1750 int new_size,
1751 int old_min_size,
1752 int new_min_size,
1753 u32 old_pg_num,
1754 u32 new_pg_num,
1755 bool old_sort_bitwise,
1756 bool new_sort_bitwise,
1757 const struct ceph_pg *pgid)
1758 {
1759 return !osds_equal(old_acting, new_acting) ||
1760 !osds_equal(old_up, new_up) ||
1761 old_size != new_size ||
1762 old_min_size != new_min_size ||
1763 is_split(pgid, old_pg_num, new_pg_num) ||
1764 old_sort_bitwise != new_sort_bitwise;
1765 }
1766
1767 static int calc_pg_rank(int osd, const struct ceph_osds *acting)
1768 {
1769 int i;
1770
1771 for (i = 0; i < acting->size; i++) {
1772 if (acting->osds[i] == osd)
1773 return i;
1774 }
1775
1776 return -1;
1777 }
1778
1779 static bool primary_changed(const struct ceph_osds *old_acting,
1780 const struct ceph_osds *new_acting)
1781 {
1782 if (!old_acting->size && !new_acting->size)
1783 return false; /* both still empty */
1784
1785 if (!old_acting->size ^ !new_acting->size)
1786 return true; /* was empty, now not, or vice versa */
1787
1788 if (old_acting->primary != new_acting->primary)
1789 return true; /* primary changed */
1790
1791 if (calc_pg_rank(old_acting->primary, old_acting) !=
1792 calc_pg_rank(new_acting->primary, new_acting))
1793 return true;
1794
1795 return false; /* same primary (tho replicas may have changed) */
1796 }
1797
1798 bool ceph_osds_changed(const struct ceph_osds *old_acting,
1799 const struct ceph_osds *new_acting,
1800 bool any_change)
1801 {
1802 if (primary_changed(old_acting, new_acting))
1803 return true;
1804
1805 if (any_change && !__osds_equal(old_acting, new_acting))
1806 return true;
1807
1808 return false;
1809 }
1810
1811 /*
1812 * calculate file layout from given offset, length.
1813 * fill in correct oid, logical length, and object extent
1814 * offset, length.
1815 *
1816 * for now, we write only a single su, until we can
1817 * pass a stride back to the caller.
1818 */
1819 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
1820 u64 off, u64 len,
1821 u64 *ono,
1822 u64 *oxoff, u64 *oxlen)
1823 {
1824 u32 osize = layout->object_size;
1825 u32 su = layout->stripe_unit;
1826 u32 sc = layout->stripe_count;
1827 u32 bl, stripeno, stripepos, objsetno;
1828 u32 su_per_object;
1829 u64 t, su_offset;
1830
1831 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
1832 osize, su);
1833 if (su == 0 || sc == 0)
1834 goto invalid;
1835 su_per_object = osize / su;
1836 if (su_per_object == 0)
1837 goto invalid;
1838 dout("osize %u / su %u = su_per_object %u\n", osize, su,
1839 su_per_object);
1840
1841 if ((su & ~PAGE_MASK) != 0)
1842 goto invalid;
1843
1844 /* bl = *off / su; */
1845 t = off;
1846 do_div(t, su);
1847 bl = t;
1848 dout("off %llu / su %u = bl %u\n", off, su, bl);
1849
1850 stripeno = bl / sc;
1851 stripepos = bl % sc;
1852 objsetno = stripeno / su_per_object;
1853
1854 *ono = objsetno * sc + stripepos;
1855 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
1856
1857 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
1858 t = off;
1859 su_offset = do_div(t, su);
1860 *oxoff = su_offset + (stripeno % su_per_object) * su;
1861
1862 /*
1863 * Calculate the length of the extent being written to the selected
1864 * object. This is the minimum of the full length requested (len) or
1865 * the remainder of the current stripe being written to.
1866 */
1867 *oxlen = min_t(u64, len, su - su_offset);
1868
1869 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
1870 return 0;
1871
1872 invalid:
1873 dout(" invalid layout\n");
1874 *ono = 0;
1875 *oxoff = 0;
1876 *oxlen = 0;
1877 return -EINVAL;
1878 }
1879 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
1880
1881 /*
1882 * Map an object into a PG.
1883 *
1884 * Should only be called with target_oid and target_oloc (as opposed to
1885 * base_oid and base_oloc), since tiering isn't taken into account.
1886 */
1887 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
1888 struct ceph_object_id *oid,
1889 struct ceph_object_locator *oloc,
1890 struct ceph_pg *raw_pgid)
1891 {
1892 struct ceph_pg_pool_info *pi;
1893
1894 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
1895 if (!pi)
1896 return -ENOENT;
1897
1898 if (!oloc->pool_ns) {
1899 raw_pgid->pool = oloc->pool;
1900 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
1901 oid->name_len);
1902 dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
1903 raw_pgid->pool, raw_pgid->seed);
1904 } else {
1905 char stack_buf[256];
1906 char *buf = stack_buf;
1907 int nsl = oloc->pool_ns->len;
1908 size_t total = nsl + 1 + oid->name_len;
1909
1910 if (total > sizeof(stack_buf)) {
1911 buf = kmalloc(total, GFP_NOIO);
1912 if (!buf)
1913 return -ENOMEM;
1914 }
1915 memcpy(buf, oloc->pool_ns->str, nsl);
1916 buf[nsl] = '\037';
1917 memcpy(buf + nsl + 1, oid->name, oid->name_len);
1918 raw_pgid->pool = oloc->pool;
1919 raw_pgid->seed = ceph_str_hash(pi->object_hash, buf, total);
1920 if (buf != stack_buf)
1921 kfree(buf);
1922 dout("%s %s ns %.*s -> raw_pgid %llu.%x\n", __func__,
1923 oid->name, nsl, oloc->pool_ns->str,
1924 raw_pgid->pool, raw_pgid->seed);
1925 }
1926 return 0;
1927 }
1928 EXPORT_SYMBOL(ceph_object_locator_to_pg);
1929
1930 /*
1931 * Map a raw PG (full precision ps) into an actual PG.
1932 */
1933 static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
1934 const struct ceph_pg *raw_pgid,
1935 struct ceph_pg *pgid)
1936 {
1937 pgid->pool = raw_pgid->pool;
1938 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
1939 pi->pg_num_mask);
1940 }
1941
1942 /*
1943 * Map a raw PG (full precision ps) into a placement ps (placement
1944 * seed). Include pool id in that value so that different pools don't
1945 * use the same seeds.
1946 */
1947 static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
1948 const struct ceph_pg *raw_pgid)
1949 {
1950 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
1951 /* hash pool id and seed so that pool PGs do not overlap */
1952 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
1953 ceph_stable_mod(raw_pgid->seed,
1954 pi->pgp_num,
1955 pi->pgp_num_mask),
1956 raw_pgid->pool);
1957 } else {
1958 /*
1959 * legacy behavior: add ps and pool together. this is
1960 * not a great approach because the PGs from each pool
1961 * will overlap on top of each other: 0.5 == 1.4 ==
1962 * 2.3 == ...
1963 */
1964 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
1965 pi->pgp_num_mask) +
1966 (unsigned)raw_pgid->pool;
1967 }
1968 }
1969
1970 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
1971 int *result, int result_max,
1972 const __u32 *weight, int weight_max)
1973 {
1974 int r;
1975
1976 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
1977
1978 mutex_lock(&map->crush_workspace_mutex);
1979 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
1980 weight, weight_max, map->crush_workspace);
1981 mutex_unlock(&map->crush_workspace_mutex);
1982
1983 return r;
1984 }
1985
1986 /*
1987 * Calculate raw set (CRUSH output) for given PG. The result may
1988 * contain nonexistent OSDs. ->primary is undefined for a raw set.
1989 *
1990 * Placement seed (CRUSH input) is returned through @ppps.
1991 */
1992 static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
1993 struct ceph_pg_pool_info *pi,
1994 const struct ceph_pg *raw_pgid,
1995 struct ceph_osds *raw,
1996 u32 *ppps)
1997 {
1998 u32 pps = raw_pg_to_pps(pi, raw_pgid);
1999 int ruleno;
2000 int len;
2001
2002 ceph_osds_init(raw);
2003 if (ppps)
2004 *ppps = pps;
2005
2006 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
2007 pi->size);
2008 if (ruleno < 0) {
2009 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
2010 pi->id, pi->crush_ruleset, pi->type, pi->size);
2011 return;
2012 }
2013
2014 if (pi->size > ARRAY_SIZE(raw->osds)) {
2015 pr_err_ratelimited("pool %lld ruleset %d type %d too wide: size %d > %zu\n",
2016 pi->id, pi->crush_ruleset, pi->type, pi->size,
2017 ARRAY_SIZE(raw->osds));
2018 return;
2019 }
2020
2021 len = do_crush(osdmap, ruleno, pps, raw->osds, pi->size,
2022 osdmap->osd_weight, osdmap->max_osd);
2023 if (len < 0) {
2024 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
2025 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
2026 pi->size);
2027 return;
2028 }
2029
2030 raw->size = len;
2031 }
2032
2033 /*
2034 * Given raw set, calculate up set and up primary. By definition of an
2035 * up set, the result won't contain nonexistent or down OSDs.
2036 *
2037 * This is done in-place - on return @set is the up set. If it's
2038 * empty, ->primary will remain undefined.
2039 */
2040 static void raw_to_up_osds(struct ceph_osdmap *osdmap,
2041 struct ceph_pg_pool_info *pi,
2042 struct ceph_osds *set)
2043 {
2044 int i;
2045
2046 /* ->primary is undefined for a raw set */
2047 BUG_ON(set->primary != -1);
2048
2049 if (ceph_can_shift_osds(pi)) {
2050 int removed = 0;
2051
2052 /* shift left */
2053 for (i = 0; i < set->size; i++) {
2054 if (ceph_osd_is_down(osdmap, set->osds[i])) {
2055 removed++;
2056 continue;
2057 }
2058 if (removed)
2059 set->osds[i - removed] = set->osds[i];
2060 }
2061 set->size -= removed;
2062 if (set->size > 0)
2063 set->primary = set->osds[0];
2064 } else {
2065 /* set down/dne devices to NONE */
2066 for (i = set->size - 1; i >= 0; i--) {
2067 if (ceph_osd_is_down(osdmap, set->osds[i]))
2068 set->osds[i] = CRUSH_ITEM_NONE;
2069 else
2070 set->primary = set->osds[i];
2071 }
2072 }
2073 }
2074
2075 static void apply_primary_affinity(struct ceph_osdmap *osdmap,
2076 struct ceph_pg_pool_info *pi,
2077 u32 pps,
2078 struct ceph_osds *up)
2079 {
2080 int i;
2081 int pos = -1;
2082
2083 /*
2084 * Do we have any non-default primary_affinity values for these
2085 * osds?
2086 */
2087 if (!osdmap->osd_primary_affinity)
2088 return;
2089
2090 for (i = 0; i < up->size; i++) {
2091 int osd = up->osds[i];
2092
2093 if (osd != CRUSH_ITEM_NONE &&
2094 osdmap->osd_primary_affinity[osd] !=
2095 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
2096 break;
2097 }
2098 }
2099 if (i == up->size)
2100 return;
2101
2102 /*
2103 * Pick the primary. Feed both the seed (for the pg) and the
2104 * osd into the hash/rng so that a proportional fraction of an
2105 * osd's pgs get rejected as primary.
2106 */
2107 for (i = 0; i < up->size; i++) {
2108 int osd = up->osds[i];
2109 u32 aff;
2110
2111 if (osd == CRUSH_ITEM_NONE)
2112 continue;
2113
2114 aff = osdmap->osd_primary_affinity[osd];
2115 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
2116 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
2117 pps, osd) >> 16) >= aff) {
2118 /*
2119 * We chose not to use this primary. Note it
2120 * anyway as a fallback in case we don't pick
2121 * anyone else, but keep looking.
2122 */
2123 if (pos < 0)
2124 pos = i;
2125 } else {
2126 pos = i;
2127 break;
2128 }
2129 }
2130 if (pos < 0)
2131 return;
2132
2133 up->primary = up->osds[pos];
2134
2135 if (ceph_can_shift_osds(pi) && pos > 0) {
2136 /* move the new primary to the front */
2137 for (i = pos; i > 0; i--)
2138 up->osds[i] = up->osds[i - 1];
2139 up->osds[0] = up->primary;
2140 }
2141 }
2142
2143 /*
2144 * Get pg_temp and primary_temp mappings for given PG.
2145 *
2146 * Note that a PG may have none, only pg_temp, only primary_temp or
2147 * both pg_temp and primary_temp mappings. This means @temp isn't
2148 * always a valid OSD set on return: in the "only primary_temp" case,
2149 * @temp will have its ->primary >= 0 but ->size == 0.
2150 */
2151 static void get_temp_osds(struct ceph_osdmap *osdmap,
2152 struct ceph_pg_pool_info *pi,
2153 const struct ceph_pg *raw_pgid,
2154 struct ceph_osds *temp)
2155 {
2156 struct ceph_pg pgid;
2157 struct ceph_pg_mapping *pg;
2158 int i;
2159
2160 raw_pg_to_pg(pi, raw_pgid, &pgid);
2161 ceph_osds_init(temp);
2162
2163 /* pg_temp? */
2164 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
2165 if (pg) {
2166 for (i = 0; i < pg->pg_temp.len; i++) {
2167 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2168 if (ceph_can_shift_osds(pi))
2169 continue;
2170
2171 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
2172 } else {
2173 temp->osds[temp->size++] = pg->pg_temp.osds[i];
2174 }
2175 }
2176
2177 /* apply pg_temp's primary */
2178 for (i = 0; i < temp->size; i++) {
2179 if (temp->osds[i] != CRUSH_ITEM_NONE) {
2180 temp->primary = temp->osds[i];
2181 break;
2182 }
2183 }
2184 }
2185
2186 /* primary_temp? */
2187 pg = __lookup_pg_mapping(&osdmap->primary_temp, pgid);
2188 if (pg)
2189 temp->primary = pg->primary_temp.osd;
2190 }
2191
2192 /*
2193 * Map a PG to its acting set as well as its up set.
2194 *
2195 * Acting set is used for data mapping purposes, while up set can be
2196 * recorded for detecting interval changes and deciding whether to
2197 * resend a request.
2198 */
2199 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
2200 const struct ceph_pg *raw_pgid,
2201 struct ceph_osds *up,
2202 struct ceph_osds *acting)
2203 {
2204 struct ceph_pg_pool_info *pi;
2205 u32 pps;
2206
2207 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
2208 if (!pi) {
2209 ceph_osds_init(up);
2210 ceph_osds_init(acting);
2211 goto out;
2212 }
2213
2214 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
2215 raw_to_up_osds(osdmap, pi, up);
2216 apply_primary_affinity(osdmap, pi, pps, up);
2217 get_temp_osds(osdmap, pi, raw_pgid, acting);
2218 if (!acting->size) {
2219 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
2220 acting->size = up->size;
2221 if (acting->primary == -1)
2222 acting->primary = up->primary;
2223 }
2224 out:
2225 WARN_ON(!osds_valid(up) || !osds_valid(acting));
2226 }
2227
2228 /*
2229 * Return acting primary for given PG, or -1 if none.
2230 */
2231 int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
2232 const struct ceph_pg *raw_pgid)
2233 {
2234 struct ceph_osds up, acting;
2235
2236 ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
2237 return acting.primary;
2238 }
2239 EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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