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UBUNTU: Ubuntu-4.15.0-96.97
[mirror_ubuntu-bionic-kernel.git] / net / ceph / osdmap.c
1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/ceph/ceph_debug.h>
4
5 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <asm/div64.h>
8
9 #include <linux/ceph/libceph.h>
10 #include <linux/ceph/osdmap.h>
11 #include <linux/ceph/decode.h>
12 #include <linux/crush/hash.h>
13 #include <linux/crush/mapper.h>
14
15 char *ceph_osdmap_state_str(char *str, int len, u32 state)
16 {
17 if (!len)
18 return str;
19
20 if ((state & CEPH_OSD_EXISTS) && (state & CEPH_OSD_UP))
21 snprintf(str, len, "exists, up");
22 else if (state & CEPH_OSD_EXISTS)
23 snprintf(str, len, "exists");
24 else if (state & CEPH_OSD_UP)
25 snprintf(str, len, "up");
26 else
27 snprintf(str, len, "doesn't exist");
28
29 return str;
30 }
31
32 /* maps */
33
34 static int calc_bits_of(unsigned int t)
35 {
36 int b = 0;
37 while (t) {
38 t = t >> 1;
39 b++;
40 }
41 return b;
42 }
43
44 /*
45 * the foo_mask is the smallest value 2^n-1 that is >= foo.
46 */
47 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
48 {
49 pi->pg_num_mask = (1 << calc_bits_of(pi->pg_num-1)) - 1;
50 pi->pgp_num_mask = (1 << calc_bits_of(pi->pgp_num-1)) - 1;
51 }
52
53 /*
54 * decode crush map
55 */
56 static int crush_decode_uniform_bucket(void **p, void *end,
57 struct crush_bucket_uniform *b)
58 {
59 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
60 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
61 b->item_weight = ceph_decode_32(p);
62 return 0;
63 bad:
64 return -EINVAL;
65 }
66
67 static int crush_decode_list_bucket(void **p, void *end,
68 struct crush_bucket_list *b)
69 {
70 int j;
71 dout("crush_decode_list_bucket %p to %p\n", *p, end);
72 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
73 if (b->item_weights == NULL)
74 return -ENOMEM;
75 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
76 if (b->sum_weights == NULL)
77 return -ENOMEM;
78 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
79 for (j = 0; j < b->h.size; j++) {
80 b->item_weights[j] = ceph_decode_32(p);
81 b->sum_weights[j] = ceph_decode_32(p);
82 }
83 return 0;
84 bad:
85 return -EINVAL;
86 }
87
88 static int crush_decode_tree_bucket(void **p, void *end,
89 struct crush_bucket_tree *b)
90 {
91 int j;
92 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
93 ceph_decode_8_safe(p, end, b->num_nodes, bad);
94 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
95 if (b->node_weights == NULL)
96 return -ENOMEM;
97 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
98 for (j = 0; j < b->num_nodes; j++)
99 b->node_weights[j] = ceph_decode_32(p);
100 return 0;
101 bad:
102 return -EINVAL;
103 }
104
105 static int crush_decode_straw_bucket(void **p, void *end,
106 struct crush_bucket_straw *b)
107 {
108 int j;
109 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
110 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
111 if (b->item_weights == NULL)
112 return -ENOMEM;
113 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
114 if (b->straws == NULL)
115 return -ENOMEM;
116 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
117 for (j = 0; j < b->h.size; j++) {
118 b->item_weights[j] = ceph_decode_32(p);
119 b->straws[j] = ceph_decode_32(p);
120 }
121 return 0;
122 bad:
123 return -EINVAL;
124 }
125
126 static int crush_decode_straw2_bucket(void **p, void *end,
127 struct crush_bucket_straw2 *b)
128 {
129 int j;
130 dout("crush_decode_straw2_bucket %p to %p\n", *p, end);
131 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
132 if (b->item_weights == NULL)
133 return -ENOMEM;
134 ceph_decode_need(p, end, b->h.size * sizeof(u32), bad);
135 for (j = 0; j < b->h.size; j++)
136 b->item_weights[j] = ceph_decode_32(p);
137 return 0;
138 bad:
139 return -EINVAL;
140 }
141
142 static struct crush_choose_arg_map *alloc_choose_arg_map(void)
143 {
144 struct crush_choose_arg_map *arg_map;
145
146 arg_map = kzalloc(sizeof(*arg_map), GFP_NOIO);
147 if (!arg_map)
148 return NULL;
149
150 RB_CLEAR_NODE(&arg_map->node);
151 return arg_map;
152 }
153
154 static void free_choose_arg_map(struct crush_choose_arg_map *arg_map)
155 {
156 if (arg_map) {
157 int i, j;
158
159 WARN_ON(!RB_EMPTY_NODE(&arg_map->node));
160
161 for (i = 0; i < arg_map->size; i++) {
162 struct crush_choose_arg *arg = &arg_map->args[i];
163
164 for (j = 0; j < arg->weight_set_size; j++)
165 kfree(arg->weight_set[j].weights);
166 kfree(arg->weight_set);
167 kfree(arg->ids);
168 }
169 kfree(arg_map->args);
170 kfree(arg_map);
171 }
172 }
173
174 DEFINE_RB_FUNCS(choose_arg_map, struct crush_choose_arg_map, choose_args_index,
175 node);
176
177 void clear_choose_args(struct crush_map *c)
178 {
179 while (!RB_EMPTY_ROOT(&c->choose_args)) {
180 struct crush_choose_arg_map *arg_map =
181 rb_entry(rb_first(&c->choose_args),
182 struct crush_choose_arg_map, node);
183
184 erase_choose_arg_map(&c->choose_args, arg_map);
185 free_choose_arg_map(arg_map);
186 }
187 }
188
189 static u32 *decode_array_32_alloc(void **p, void *end, u32 *plen)
190 {
191 u32 *a = NULL;
192 u32 len;
193 int ret;
194
195 ceph_decode_32_safe(p, end, len, e_inval);
196 if (len) {
197 u32 i;
198
199 a = kmalloc_array(len, sizeof(u32), GFP_NOIO);
200 if (!a) {
201 ret = -ENOMEM;
202 goto fail;
203 }
204
205 ceph_decode_need(p, end, len * sizeof(u32), e_inval);
206 for (i = 0; i < len; i++)
207 a[i] = ceph_decode_32(p);
208 }
209
210 *plen = len;
211 return a;
212
213 e_inval:
214 ret = -EINVAL;
215 fail:
216 kfree(a);
217 return ERR_PTR(ret);
218 }
219
220 /*
221 * Assumes @arg is zero-initialized.
222 */
223 static int decode_choose_arg(void **p, void *end, struct crush_choose_arg *arg)
224 {
225 int ret;
226
227 ceph_decode_32_safe(p, end, arg->weight_set_size, e_inval);
228 if (arg->weight_set_size) {
229 u32 i;
230
231 arg->weight_set = kmalloc_array(arg->weight_set_size,
232 sizeof(*arg->weight_set),
233 GFP_NOIO);
234 if (!arg->weight_set)
235 return -ENOMEM;
236
237 for (i = 0; i < arg->weight_set_size; i++) {
238 struct crush_weight_set *w = &arg->weight_set[i];
239
240 w->weights = decode_array_32_alloc(p, end, &w->size);
241 if (IS_ERR(w->weights)) {
242 ret = PTR_ERR(w->weights);
243 w->weights = NULL;
244 return ret;
245 }
246 }
247 }
248
249 arg->ids = decode_array_32_alloc(p, end, &arg->ids_size);
250 if (IS_ERR(arg->ids)) {
251 ret = PTR_ERR(arg->ids);
252 arg->ids = NULL;
253 return ret;
254 }
255
256 return 0;
257
258 e_inval:
259 return -EINVAL;
260 }
261
262 static int decode_choose_args(void **p, void *end, struct crush_map *c)
263 {
264 struct crush_choose_arg_map *arg_map = NULL;
265 u32 num_choose_arg_maps, num_buckets;
266 int ret;
267
268 ceph_decode_32_safe(p, end, num_choose_arg_maps, e_inval);
269 while (num_choose_arg_maps--) {
270 arg_map = alloc_choose_arg_map();
271 if (!arg_map) {
272 ret = -ENOMEM;
273 goto fail;
274 }
275
276 ceph_decode_64_safe(p, end, arg_map->choose_args_index,
277 e_inval);
278 arg_map->size = c->max_buckets;
279 arg_map->args = kcalloc(arg_map->size, sizeof(*arg_map->args),
280 GFP_NOIO);
281 if (!arg_map->args) {
282 ret = -ENOMEM;
283 goto fail;
284 }
285
286 ceph_decode_32_safe(p, end, num_buckets, e_inval);
287 while (num_buckets--) {
288 struct crush_choose_arg *arg;
289 u32 bucket_index;
290
291 ceph_decode_32_safe(p, end, bucket_index, e_inval);
292 if (bucket_index >= arg_map->size)
293 goto e_inval;
294
295 arg = &arg_map->args[bucket_index];
296 ret = decode_choose_arg(p, end, arg);
297 if (ret)
298 goto fail;
299
300 if (arg->ids_size &&
301 arg->ids_size != c->buckets[bucket_index]->size)
302 goto e_inval;
303 }
304
305 insert_choose_arg_map(&c->choose_args, arg_map);
306 }
307
308 return 0;
309
310 e_inval:
311 ret = -EINVAL;
312 fail:
313 free_choose_arg_map(arg_map);
314 return ret;
315 }
316
317 static void crush_finalize(struct crush_map *c)
318 {
319 __s32 b;
320
321 /* Space for the array of pointers to per-bucket workspace */
322 c->working_size = sizeof(struct crush_work) +
323 c->max_buckets * sizeof(struct crush_work_bucket *);
324
325 for (b = 0; b < c->max_buckets; b++) {
326 if (!c->buckets[b])
327 continue;
328
329 switch (c->buckets[b]->alg) {
330 default:
331 /*
332 * The base case, permutation variables and
333 * the pointer to the permutation array.
334 */
335 c->working_size += sizeof(struct crush_work_bucket);
336 break;
337 }
338 /* Every bucket has a permutation array. */
339 c->working_size += c->buckets[b]->size * sizeof(__u32);
340 }
341 }
342
343 static struct crush_map *crush_decode(void *pbyval, void *end)
344 {
345 struct crush_map *c;
346 int err;
347 int i, j;
348 void **p = &pbyval;
349 void *start = pbyval;
350 u32 magic;
351
352 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
353
354 c = kzalloc(sizeof(*c), GFP_NOFS);
355 if (c == NULL)
356 return ERR_PTR(-ENOMEM);
357
358 c->choose_args = RB_ROOT;
359
360 /* set tunables to default values */
361 c->choose_local_tries = 2;
362 c->choose_local_fallback_tries = 5;
363 c->choose_total_tries = 19;
364 c->chooseleaf_descend_once = 0;
365
366 ceph_decode_need(p, end, 4*sizeof(u32), bad);
367 magic = ceph_decode_32(p);
368 if (magic != CRUSH_MAGIC) {
369 pr_err("crush_decode magic %x != current %x\n",
370 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
371 goto bad;
372 }
373 c->max_buckets = ceph_decode_32(p);
374 c->max_rules = ceph_decode_32(p);
375 c->max_devices = ceph_decode_32(p);
376
377 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
378 if (c->buckets == NULL)
379 goto badmem;
380 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
381 if (c->rules == NULL)
382 goto badmem;
383
384 /* buckets */
385 for (i = 0; i < c->max_buckets; i++) {
386 int size = 0;
387 u32 alg;
388 struct crush_bucket *b;
389
390 ceph_decode_32_safe(p, end, alg, bad);
391 if (alg == 0) {
392 c->buckets[i] = NULL;
393 continue;
394 }
395 dout("crush_decode bucket %d off %x %p to %p\n",
396 i, (int)(*p-start), *p, end);
397
398 switch (alg) {
399 case CRUSH_BUCKET_UNIFORM:
400 size = sizeof(struct crush_bucket_uniform);
401 break;
402 case CRUSH_BUCKET_LIST:
403 size = sizeof(struct crush_bucket_list);
404 break;
405 case CRUSH_BUCKET_TREE:
406 size = sizeof(struct crush_bucket_tree);
407 break;
408 case CRUSH_BUCKET_STRAW:
409 size = sizeof(struct crush_bucket_straw);
410 break;
411 case CRUSH_BUCKET_STRAW2:
412 size = sizeof(struct crush_bucket_straw2);
413 break;
414 default:
415 goto bad;
416 }
417 BUG_ON(size == 0);
418 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
419 if (b == NULL)
420 goto badmem;
421
422 ceph_decode_need(p, end, 4*sizeof(u32), bad);
423 b->id = ceph_decode_32(p);
424 b->type = ceph_decode_16(p);
425 b->alg = ceph_decode_8(p);
426 b->hash = ceph_decode_8(p);
427 b->weight = ceph_decode_32(p);
428 b->size = ceph_decode_32(p);
429
430 dout("crush_decode bucket size %d off %x %p to %p\n",
431 b->size, (int)(*p-start), *p, end);
432
433 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
434 if (b->items == NULL)
435 goto badmem;
436
437 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
438 for (j = 0; j < b->size; j++)
439 b->items[j] = ceph_decode_32(p);
440
441 switch (b->alg) {
442 case CRUSH_BUCKET_UNIFORM:
443 err = crush_decode_uniform_bucket(p, end,
444 (struct crush_bucket_uniform *)b);
445 if (err < 0)
446 goto fail;
447 break;
448 case CRUSH_BUCKET_LIST:
449 err = crush_decode_list_bucket(p, end,
450 (struct crush_bucket_list *)b);
451 if (err < 0)
452 goto fail;
453 break;
454 case CRUSH_BUCKET_TREE:
455 err = crush_decode_tree_bucket(p, end,
456 (struct crush_bucket_tree *)b);
457 if (err < 0)
458 goto fail;
459 break;
460 case CRUSH_BUCKET_STRAW:
461 err = crush_decode_straw_bucket(p, end,
462 (struct crush_bucket_straw *)b);
463 if (err < 0)
464 goto fail;
465 break;
466 case CRUSH_BUCKET_STRAW2:
467 err = crush_decode_straw2_bucket(p, end,
468 (struct crush_bucket_straw2 *)b);
469 if (err < 0)
470 goto fail;
471 break;
472 }
473 }
474
475 /* rules */
476 dout("rule vec is %p\n", c->rules);
477 for (i = 0; i < c->max_rules; i++) {
478 u32 yes;
479 struct crush_rule *r;
480
481 ceph_decode_32_safe(p, end, yes, bad);
482 if (!yes) {
483 dout("crush_decode NO rule %d off %x %p to %p\n",
484 i, (int)(*p-start), *p, end);
485 c->rules[i] = NULL;
486 continue;
487 }
488
489 dout("crush_decode rule %d off %x %p to %p\n",
490 i, (int)(*p-start), *p, end);
491
492 /* len */
493 ceph_decode_32_safe(p, end, yes, bad);
494 #if BITS_PER_LONG == 32
495 if (yes > (ULONG_MAX - sizeof(*r))
496 / sizeof(struct crush_rule_step))
497 goto bad;
498 #endif
499 r = c->rules[i] = kmalloc(sizeof(*r) +
500 yes*sizeof(struct crush_rule_step),
501 GFP_NOFS);
502 if (r == NULL)
503 goto badmem;
504 dout(" rule %d is at %p\n", i, r);
505 r->len = yes;
506 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
507 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
508 for (j = 0; j < r->len; j++) {
509 r->steps[j].op = ceph_decode_32(p);
510 r->steps[j].arg1 = ceph_decode_32(p);
511 r->steps[j].arg2 = ceph_decode_32(p);
512 }
513 }
514
515 ceph_decode_skip_map(p, end, 32, string, bad); /* type_map */
516 ceph_decode_skip_map(p, end, 32, string, bad); /* name_map */
517 ceph_decode_skip_map(p, end, 32, string, bad); /* rule_name_map */
518
519 /* tunables */
520 ceph_decode_need(p, end, 3*sizeof(u32), done);
521 c->choose_local_tries = ceph_decode_32(p);
522 c->choose_local_fallback_tries = ceph_decode_32(p);
523 c->choose_total_tries = ceph_decode_32(p);
524 dout("crush decode tunable choose_local_tries = %d\n",
525 c->choose_local_tries);
526 dout("crush decode tunable choose_local_fallback_tries = %d\n",
527 c->choose_local_fallback_tries);
528 dout("crush decode tunable choose_total_tries = %d\n",
529 c->choose_total_tries);
530
531 ceph_decode_need(p, end, sizeof(u32), done);
532 c->chooseleaf_descend_once = ceph_decode_32(p);
533 dout("crush decode tunable chooseleaf_descend_once = %d\n",
534 c->chooseleaf_descend_once);
535
536 ceph_decode_need(p, end, sizeof(u8), done);
537 c->chooseleaf_vary_r = ceph_decode_8(p);
538 dout("crush decode tunable chooseleaf_vary_r = %d\n",
539 c->chooseleaf_vary_r);
540
541 /* skip straw_calc_version, allowed_bucket_algs */
542 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
543 *p += sizeof(u8) + sizeof(u32);
544
545 ceph_decode_need(p, end, sizeof(u8), done);
546 c->chooseleaf_stable = ceph_decode_8(p);
547 dout("crush decode tunable chooseleaf_stable = %d\n",
548 c->chooseleaf_stable);
549
550 if (*p != end) {
551 /* class_map */
552 ceph_decode_skip_map(p, end, 32, 32, bad);
553 /* class_name */
554 ceph_decode_skip_map(p, end, 32, string, bad);
555 /* class_bucket */
556 ceph_decode_skip_map_of_map(p, end, 32, 32, 32, bad);
557 }
558
559 if (*p != end) {
560 err = decode_choose_args(p, end, c);
561 if (err)
562 goto fail;
563 }
564
565 done:
566 crush_finalize(c);
567 dout("crush_decode success\n");
568 return c;
569
570 badmem:
571 err = -ENOMEM;
572 fail:
573 dout("crush_decode fail %d\n", err);
574 crush_destroy(c);
575 return ERR_PTR(err);
576
577 bad:
578 err = -EINVAL;
579 goto fail;
580 }
581
582 int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
583 {
584 if (lhs->pool < rhs->pool)
585 return -1;
586 if (lhs->pool > rhs->pool)
587 return 1;
588 if (lhs->seed < rhs->seed)
589 return -1;
590 if (lhs->seed > rhs->seed)
591 return 1;
592
593 return 0;
594 }
595
596 int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs)
597 {
598 int ret;
599
600 ret = ceph_pg_compare(&lhs->pgid, &rhs->pgid);
601 if (ret)
602 return ret;
603
604 if (lhs->shard < rhs->shard)
605 return -1;
606 if (lhs->shard > rhs->shard)
607 return 1;
608
609 return 0;
610 }
611
612 static struct ceph_pg_mapping *alloc_pg_mapping(size_t payload_len)
613 {
614 struct ceph_pg_mapping *pg;
615
616 pg = kmalloc(sizeof(*pg) + payload_len, GFP_NOIO);
617 if (!pg)
618 return NULL;
619
620 RB_CLEAR_NODE(&pg->node);
621 return pg;
622 }
623
624 static void free_pg_mapping(struct ceph_pg_mapping *pg)
625 {
626 WARN_ON(!RB_EMPTY_NODE(&pg->node));
627
628 kfree(pg);
629 }
630
631 /*
632 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
633 * to a set of osds) and primary_temp (explicit primary setting)
634 */
635 DEFINE_RB_FUNCS2(pg_mapping, struct ceph_pg_mapping, pgid, ceph_pg_compare,
636 RB_BYPTR, const struct ceph_pg *, node)
637
638 /*
639 * rbtree of pg pool info
640 */
641 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
642 {
643 struct rb_node **p = &root->rb_node;
644 struct rb_node *parent = NULL;
645 struct ceph_pg_pool_info *pi = NULL;
646
647 while (*p) {
648 parent = *p;
649 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
650 if (new->id < pi->id)
651 p = &(*p)->rb_left;
652 else if (new->id > pi->id)
653 p = &(*p)->rb_right;
654 else
655 return -EEXIST;
656 }
657
658 rb_link_node(&new->node, parent, p);
659 rb_insert_color(&new->node, root);
660 return 0;
661 }
662
663 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
664 {
665 struct ceph_pg_pool_info *pi;
666 struct rb_node *n = root->rb_node;
667
668 while (n) {
669 pi = rb_entry(n, struct ceph_pg_pool_info, node);
670 if (id < pi->id)
671 n = n->rb_left;
672 else if (id > pi->id)
673 n = n->rb_right;
674 else
675 return pi;
676 }
677 return NULL;
678 }
679
680 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
681 {
682 return __lookup_pg_pool(&map->pg_pools, id);
683 }
684
685 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
686 {
687 struct ceph_pg_pool_info *pi;
688
689 if (id == CEPH_NOPOOL)
690 return NULL;
691
692 if (WARN_ON_ONCE(id > (u64) INT_MAX))
693 return NULL;
694
695 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
696
697 return pi ? pi->name : NULL;
698 }
699 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
700
701 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
702 {
703 struct rb_node *rbp;
704
705 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
706 struct ceph_pg_pool_info *pi =
707 rb_entry(rbp, struct ceph_pg_pool_info, node);
708 if (pi->name && strcmp(pi->name, name) == 0)
709 return pi->id;
710 }
711 return -ENOENT;
712 }
713 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
714
715 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
716 {
717 rb_erase(&pi->node, root);
718 kfree(pi->name);
719 kfree(pi);
720 }
721
722 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
723 {
724 u8 ev, cv;
725 unsigned len, num;
726 void *pool_end;
727
728 ceph_decode_need(p, end, 2 + 4, bad);
729 ev = ceph_decode_8(p); /* encoding version */
730 cv = ceph_decode_8(p); /* compat version */
731 if (ev < 5) {
732 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
733 return -EINVAL;
734 }
735 if (cv > 9) {
736 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
737 return -EINVAL;
738 }
739 len = ceph_decode_32(p);
740 ceph_decode_need(p, end, len, bad);
741 pool_end = *p + len;
742
743 pi->type = ceph_decode_8(p);
744 pi->size = ceph_decode_8(p);
745 pi->crush_ruleset = ceph_decode_8(p);
746 pi->object_hash = ceph_decode_8(p);
747
748 pi->pg_num = ceph_decode_32(p);
749 pi->pgp_num = ceph_decode_32(p);
750
751 *p += 4 + 4; /* skip lpg* */
752 *p += 4; /* skip last_change */
753 *p += 8 + 4; /* skip snap_seq, snap_epoch */
754
755 /* skip snaps */
756 num = ceph_decode_32(p);
757 while (num--) {
758 *p += 8; /* snapid key */
759 *p += 1 + 1; /* versions */
760 len = ceph_decode_32(p);
761 *p += len;
762 }
763
764 /* skip removed_snaps */
765 num = ceph_decode_32(p);
766 *p += num * (8 + 8);
767
768 *p += 8; /* skip auid */
769 pi->flags = ceph_decode_64(p);
770 *p += 4; /* skip crash_replay_interval */
771
772 if (ev >= 7)
773 pi->min_size = ceph_decode_8(p);
774 else
775 pi->min_size = pi->size - pi->size / 2;
776
777 if (ev >= 8)
778 *p += 8 + 8; /* skip quota_max_* */
779
780 if (ev >= 9) {
781 /* skip tiers */
782 num = ceph_decode_32(p);
783 *p += num * 8;
784
785 *p += 8; /* skip tier_of */
786 *p += 1; /* skip cache_mode */
787
788 pi->read_tier = ceph_decode_64(p);
789 pi->write_tier = ceph_decode_64(p);
790 } else {
791 pi->read_tier = -1;
792 pi->write_tier = -1;
793 }
794
795 if (ev >= 10) {
796 /* skip properties */
797 num = ceph_decode_32(p);
798 while (num--) {
799 len = ceph_decode_32(p);
800 *p += len; /* key */
801 len = ceph_decode_32(p);
802 *p += len; /* val */
803 }
804 }
805
806 if (ev >= 11) {
807 /* skip hit_set_params */
808 *p += 1 + 1; /* versions */
809 len = ceph_decode_32(p);
810 *p += len;
811
812 *p += 4; /* skip hit_set_period */
813 *p += 4; /* skip hit_set_count */
814 }
815
816 if (ev >= 12)
817 *p += 4; /* skip stripe_width */
818
819 if (ev >= 13) {
820 *p += 8; /* skip target_max_bytes */
821 *p += 8; /* skip target_max_objects */
822 *p += 4; /* skip cache_target_dirty_ratio_micro */
823 *p += 4; /* skip cache_target_full_ratio_micro */
824 *p += 4; /* skip cache_min_flush_age */
825 *p += 4; /* skip cache_min_evict_age */
826 }
827
828 if (ev >= 14) {
829 /* skip erasure_code_profile */
830 len = ceph_decode_32(p);
831 *p += len;
832 }
833
834 /*
835 * last_force_op_resend_preluminous, will be overridden if the
836 * map was encoded with RESEND_ON_SPLIT
837 */
838 if (ev >= 15)
839 pi->last_force_request_resend = ceph_decode_32(p);
840 else
841 pi->last_force_request_resend = 0;
842
843 if (ev >= 16)
844 *p += 4; /* skip min_read_recency_for_promote */
845
846 if (ev >= 17)
847 *p += 8; /* skip expected_num_objects */
848
849 if (ev >= 19)
850 *p += 4; /* skip cache_target_dirty_high_ratio_micro */
851
852 if (ev >= 20)
853 *p += 4; /* skip min_write_recency_for_promote */
854
855 if (ev >= 21)
856 *p += 1; /* skip use_gmt_hitset */
857
858 if (ev >= 22)
859 *p += 1; /* skip fast_read */
860
861 if (ev >= 23) {
862 *p += 4; /* skip hit_set_grade_decay_rate */
863 *p += 4; /* skip hit_set_search_last_n */
864 }
865
866 if (ev >= 24) {
867 /* skip opts */
868 *p += 1 + 1; /* versions */
869 len = ceph_decode_32(p);
870 *p += len;
871 }
872
873 if (ev >= 25)
874 pi->last_force_request_resend = ceph_decode_32(p);
875
876 /* ignore the rest */
877
878 *p = pool_end;
879 calc_pg_masks(pi);
880 return 0;
881
882 bad:
883 return -EINVAL;
884 }
885
886 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
887 {
888 struct ceph_pg_pool_info *pi;
889 u32 num, len;
890 u64 pool;
891
892 ceph_decode_32_safe(p, end, num, bad);
893 dout(" %d pool names\n", num);
894 while (num--) {
895 ceph_decode_64_safe(p, end, pool, bad);
896 ceph_decode_32_safe(p, end, len, bad);
897 dout(" pool %llu len %d\n", pool, len);
898 ceph_decode_need(p, end, len, bad);
899 pi = __lookup_pg_pool(&map->pg_pools, pool);
900 if (pi) {
901 char *name = kstrndup(*p, len, GFP_NOFS);
902
903 if (!name)
904 return -ENOMEM;
905 kfree(pi->name);
906 pi->name = name;
907 dout(" name is %s\n", pi->name);
908 }
909 *p += len;
910 }
911 return 0;
912
913 bad:
914 return -EINVAL;
915 }
916
917 /*
918 * osd map
919 */
920 struct ceph_osdmap *ceph_osdmap_alloc(void)
921 {
922 struct ceph_osdmap *map;
923
924 map = kzalloc(sizeof(*map), GFP_NOIO);
925 if (!map)
926 return NULL;
927
928 map->pg_pools = RB_ROOT;
929 map->pool_max = -1;
930 map->pg_temp = RB_ROOT;
931 map->primary_temp = RB_ROOT;
932 map->pg_upmap = RB_ROOT;
933 map->pg_upmap_items = RB_ROOT;
934 mutex_init(&map->crush_workspace_mutex);
935
936 return map;
937 }
938
939 void ceph_osdmap_destroy(struct ceph_osdmap *map)
940 {
941 dout("osdmap_destroy %p\n", map);
942 if (map->crush)
943 crush_destroy(map->crush);
944 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
945 struct ceph_pg_mapping *pg =
946 rb_entry(rb_first(&map->pg_temp),
947 struct ceph_pg_mapping, node);
948 erase_pg_mapping(&map->pg_temp, pg);
949 free_pg_mapping(pg);
950 }
951 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
952 struct ceph_pg_mapping *pg =
953 rb_entry(rb_first(&map->primary_temp),
954 struct ceph_pg_mapping, node);
955 erase_pg_mapping(&map->primary_temp, pg);
956 free_pg_mapping(pg);
957 }
958 while (!RB_EMPTY_ROOT(&map->pg_upmap)) {
959 struct ceph_pg_mapping *pg =
960 rb_entry(rb_first(&map->pg_upmap),
961 struct ceph_pg_mapping, node);
962 rb_erase(&pg->node, &map->pg_upmap);
963 kfree(pg);
964 }
965 while (!RB_EMPTY_ROOT(&map->pg_upmap_items)) {
966 struct ceph_pg_mapping *pg =
967 rb_entry(rb_first(&map->pg_upmap_items),
968 struct ceph_pg_mapping, node);
969 rb_erase(&pg->node, &map->pg_upmap_items);
970 kfree(pg);
971 }
972 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
973 struct ceph_pg_pool_info *pi =
974 rb_entry(rb_first(&map->pg_pools),
975 struct ceph_pg_pool_info, node);
976 __remove_pg_pool(&map->pg_pools, pi);
977 }
978 kfree(map->osd_state);
979 kfree(map->osd_weight);
980 kfree(map->osd_addr);
981 kfree(map->osd_primary_affinity);
982 kfree(map->crush_workspace);
983 kfree(map);
984 }
985
986 /*
987 * Adjust max_osd value, (re)allocate arrays.
988 *
989 * The new elements are properly initialized.
990 */
991 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
992 {
993 u32 *state;
994 u32 *weight;
995 struct ceph_entity_addr *addr;
996 int i;
997
998 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
999 if (!state)
1000 return -ENOMEM;
1001 map->osd_state = state;
1002
1003 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
1004 if (!weight)
1005 return -ENOMEM;
1006 map->osd_weight = weight;
1007
1008 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
1009 if (!addr)
1010 return -ENOMEM;
1011 map->osd_addr = addr;
1012
1013 for (i = map->max_osd; i < max; i++) {
1014 map->osd_state[i] = 0;
1015 map->osd_weight[i] = CEPH_OSD_OUT;
1016 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
1017 }
1018
1019 if (map->osd_primary_affinity) {
1020 u32 *affinity;
1021
1022 affinity = krealloc(map->osd_primary_affinity,
1023 max*sizeof(*affinity), GFP_NOFS);
1024 if (!affinity)
1025 return -ENOMEM;
1026 map->osd_primary_affinity = affinity;
1027
1028 for (i = map->max_osd; i < max; i++)
1029 map->osd_primary_affinity[i] =
1030 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1031 }
1032
1033 map->max_osd = max;
1034
1035 return 0;
1036 }
1037
1038 static int osdmap_set_crush(struct ceph_osdmap *map, struct crush_map *crush)
1039 {
1040 void *workspace;
1041 size_t work_size;
1042
1043 if (IS_ERR(crush))
1044 return PTR_ERR(crush);
1045
1046 work_size = crush_work_size(crush, CEPH_PG_MAX_SIZE);
1047 dout("%s work_size %zu bytes\n", __func__, work_size);
1048 workspace = kmalloc(work_size, GFP_NOIO);
1049 if (!workspace) {
1050 crush_destroy(crush);
1051 return -ENOMEM;
1052 }
1053 crush_init_workspace(crush, workspace);
1054
1055 if (map->crush)
1056 crush_destroy(map->crush);
1057 kfree(map->crush_workspace);
1058 map->crush = crush;
1059 map->crush_workspace = workspace;
1060 return 0;
1061 }
1062
1063 #define OSDMAP_WRAPPER_COMPAT_VER 7
1064 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
1065
1066 /*
1067 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
1068 * to struct_v of the client_data section for new (v7 and above)
1069 * osdmaps.
1070 */
1071 static int get_osdmap_client_data_v(void **p, void *end,
1072 const char *prefix, u8 *v)
1073 {
1074 u8 struct_v;
1075
1076 ceph_decode_8_safe(p, end, struct_v, e_inval);
1077 if (struct_v >= 7) {
1078 u8 struct_compat;
1079
1080 ceph_decode_8_safe(p, end, struct_compat, e_inval);
1081 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
1082 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
1083 struct_v, struct_compat,
1084 OSDMAP_WRAPPER_COMPAT_VER, prefix);
1085 return -EINVAL;
1086 }
1087 *p += 4; /* ignore wrapper struct_len */
1088
1089 ceph_decode_8_safe(p, end, struct_v, e_inval);
1090 ceph_decode_8_safe(p, end, struct_compat, e_inval);
1091 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
1092 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
1093 struct_v, struct_compat,
1094 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
1095 return -EINVAL;
1096 }
1097 *p += 4; /* ignore client data struct_len */
1098 } else {
1099 u16 version;
1100
1101 *p -= 1;
1102 ceph_decode_16_safe(p, end, version, e_inval);
1103 if (version < 6) {
1104 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
1105 version, prefix);
1106 return -EINVAL;
1107 }
1108
1109 /* old osdmap enconding */
1110 struct_v = 0;
1111 }
1112
1113 *v = struct_v;
1114 return 0;
1115
1116 e_inval:
1117 return -EINVAL;
1118 }
1119
1120 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
1121 bool incremental)
1122 {
1123 u32 n;
1124
1125 ceph_decode_32_safe(p, end, n, e_inval);
1126 while (n--) {
1127 struct ceph_pg_pool_info *pi;
1128 u64 pool;
1129 int ret;
1130
1131 ceph_decode_64_safe(p, end, pool, e_inval);
1132
1133 pi = __lookup_pg_pool(&map->pg_pools, pool);
1134 if (!incremental || !pi) {
1135 pi = kzalloc(sizeof(*pi), GFP_NOFS);
1136 if (!pi)
1137 return -ENOMEM;
1138
1139 pi->id = pool;
1140
1141 ret = __insert_pg_pool(&map->pg_pools, pi);
1142 if (ret) {
1143 kfree(pi);
1144 return ret;
1145 }
1146 }
1147
1148 ret = decode_pool(p, end, pi);
1149 if (ret)
1150 return ret;
1151 }
1152
1153 return 0;
1154
1155 e_inval:
1156 return -EINVAL;
1157 }
1158
1159 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
1160 {
1161 return __decode_pools(p, end, map, false);
1162 }
1163
1164 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
1165 {
1166 return __decode_pools(p, end, map, true);
1167 }
1168
1169 typedef struct ceph_pg_mapping *(*decode_mapping_fn_t)(void **, void *, bool);
1170
1171 static int decode_pg_mapping(void **p, void *end, struct rb_root *mapping_root,
1172 decode_mapping_fn_t fn, bool incremental)
1173 {
1174 u32 n;
1175
1176 WARN_ON(!incremental && !fn);
1177
1178 ceph_decode_32_safe(p, end, n, e_inval);
1179 while (n--) {
1180 struct ceph_pg_mapping *pg;
1181 struct ceph_pg pgid;
1182 int ret;
1183
1184 ret = ceph_decode_pgid(p, end, &pgid);
1185 if (ret)
1186 return ret;
1187
1188 pg = lookup_pg_mapping(mapping_root, &pgid);
1189 if (pg) {
1190 WARN_ON(!incremental);
1191 erase_pg_mapping(mapping_root, pg);
1192 free_pg_mapping(pg);
1193 }
1194
1195 if (fn) {
1196 pg = fn(p, end, incremental);
1197 if (IS_ERR(pg))
1198 return PTR_ERR(pg);
1199
1200 if (pg) {
1201 pg->pgid = pgid; /* struct */
1202 insert_pg_mapping(mapping_root, pg);
1203 }
1204 }
1205 }
1206
1207 return 0;
1208
1209 e_inval:
1210 return -EINVAL;
1211 }
1212
1213 static struct ceph_pg_mapping *__decode_pg_temp(void **p, void *end,
1214 bool incremental)
1215 {
1216 struct ceph_pg_mapping *pg;
1217 u32 len, i;
1218
1219 ceph_decode_32_safe(p, end, len, e_inval);
1220 if (len == 0 && incremental)
1221 return NULL; /* new_pg_temp: [] to remove */
1222 if (len > (SIZE_MAX - sizeof(*pg)) / sizeof(u32))
1223 return ERR_PTR(-EINVAL);
1224
1225 ceph_decode_need(p, end, len * sizeof(u32), e_inval);
1226 pg = alloc_pg_mapping(len * sizeof(u32));
1227 if (!pg)
1228 return ERR_PTR(-ENOMEM);
1229
1230 pg->pg_temp.len = len;
1231 for (i = 0; i < len; i++)
1232 pg->pg_temp.osds[i] = ceph_decode_32(p);
1233
1234 return pg;
1235
1236 e_inval:
1237 return ERR_PTR(-EINVAL);
1238 }
1239
1240 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1241 {
1242 return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
1243 false);
1244 }
1245
1246 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1247 {
1248 return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
1249 true);
1250 }
1251
1252 static struct ceph_pg_mapping *__decode_primary_temp(void **p, void *end,
1253 bool incremental)
1254 {
1255 struct ceph_pg_mapping *pg;
1256 u32 osd;
1257
1258 ceph_decode_32_safe(p, end, osd, e_inval);
1259 if (osd == (u32)-1 && incremental)
1260 return NULL; /* new_primary_temp: -1 to remove */
1261
1262 pg = alloc_pg_mapping(0);
1263 if (!pg)
1264 return ERR_PTR(-ENOMEM);
1265
1266 pg->primary_temp.osd = osd;
1267 return pg;
1268
1269 e_inval:
1270 return ERR_PTR(-EINVAL);
1271 }
1272
1273 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
1274 {
1275 return decode_pg_mapping(p, end, &map->primary_temp,
1276 __decode_primary_temp, false);
1277 }
1278
1279 static int decode_new_primary_temp(void **p, void *end,
1280 struct ceph_osdmap *map)
1281 {
1282 return decode_pg_mapping(p, end, &map->primary_temp,
1283 __decode_primary_temp, true);
1284 }
1285
1286 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
1287 {
1288 BUG_ON(osd >= map->max_osd);
1289
1290 if (!map->osd_primary_affinity)
1291 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1292
1293 return map->osd_primary_affinity[osd];
1294 }
1295
1296 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
1297 {
1298 BUG_ON(osd >= map->max_osd);
1299
1300 if (!map->osd_primary_affinity) {
1301 int i;
1302
1303 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
1304 GFP_NOFS);
1305 if (!map->osd_primary_affinity)
1306 return -ENOMEM;
1307
1308 for (i = 0; i < map->max_osd; i++)
1309 map->osd_primary_affinity[i] =
1310 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1311 }
1312
1313 map->osd_primary_affinity[osd] = aff;
1314
1315 return 0;
1316 }
1317
1318 static int decode_primary_affinity(void **p, void *end,
1319 struct ceph_osdmap *map)
1320 {
1321 u32 len, i;
1322
1323 ceph_decode_32_safe(p, end, len, e_inval);
1324 if (len == 0) {
1325 kfree(map->osd_primary_affinity);
1326 map->osd_primary_affinity = NULL;
1327 return 0;
1328 }
1329 if (len != map->max_osd)
1330 goto e_inval;
1331
1332 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1333
1334 for (i = 0; i < map->max_osd; i++) {
1335 int ret;
1336
1337 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1338 if (ret)
1339 return ret;
1340 }
1341
1342 return 0;
1343
1344 e_inval:
1345 return -EINVAL;
1346 }
1347
1348 static int decode_new_primary_affinity(void **p, void *end,
1349 struct ceph_osdmap *map)
1350 {
1351 u32 n;
1352
1353 ceph_decode_32_safe(p, end, n, e_inval);
1354 while (n--) {
1355 u32 osd, aff;
1356 int ret;
1357
1358 ceph_decode_32_safe(p, end, osd, e_inval);
1359 ceph_decode_32_safe(p, end, aff, e_inval);
1360
1361 ret = set_primary_affinity(map, osd, aff);
1362 if (ret)
1363 return ret;
1364
1365 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1366 }
1367
1368 return 0;
1369
1370 e_inval:
1371 return -EINVAL;
1372 }
1373
1374 static struct ceph_pg_mapping *__decode_pg_upmap(void **p, void *end,
1375 bool __unused)
1376 {
1377 return __decode_pg_temp(p, end, false);
1378 }
1379
1380 static int decode_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1381 {
1382 return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
1383 false);
1384 }
1385
1386 static int decode_new_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1387 {
1388 return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
1389 true);
1390 }
1391
1392 static int decode_old_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1393 {
1394 return decode_pg_mapping(p, end, &map->pg_upmap, NULL, true);
1395 }
1396
1397 static struct ceph_pg_mapping *__decode_pg_upmap_items(void **p, void *end,
1398 bool __unused)
1399 {
1400 struct ceph_pg_mapping *pg;
1401 u32 len, i;
1402
1403 ceph_decode_32_safe(p, end, len, e_inval);
1404 if (len > (SIZE_MAX - sizeof(*pg)) / (2 * sizeof(u32)))
1405 return ERR_PTR(-EINVAL);
1406
1407 ceph_decode_need(p, end, 2 * len * sizeof(u32), e_inval);
1408 pg = alloc_pg_mapping(2 * len * sizeof(u32));
1409 if (!pg)
1410 return ERR_PTR(-ENOMEM);
1411
1412 pg->pg_upmap_items.len = len;
1413 for (i = 0; i < len; i++) {
1414 pg->pg_upmap_items.from_to[i][0] = ceph_decode_32(p);
1415 pg->pg_upmap_items.from_to[i][1] = ceph_decode_32(p);
1416 }
1417
1418 return pg;
1419
1420 e_inval:
1421 return ERR_PTR(-EINVAL);
1422 }
1423
1424 static int decode_pg_upmap_items(void **p, void *end, struct ceph_osdmap *map)
1425 {
1426 return decode_pg_mapping(p, end, &map->pg_upmap_items,
1427 __decode_pg_upmap_items, false);
1428 }
1429
1430 static int decode_new_pg_upmap_items(void **p, void *end,
1431 struct ceph_osdmap *map)
1432 {
1433 return decode_pg_mapping(p, end, &map->pg_upmap_items,
1434 __decode_pg_upmap_items, true);
1435 }
1436
1437 static int decode_old_pg_upmap_items(void **p, void *end,
1438 struct ceph_osdmap *map)
1439 {
1440 return decode_pg_mapping(p, end, &map->pg_upmap_items, NULL, true);
1441 }
1442
1443 /*
1444 * decode a full map.
1445 */
1446 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1447 {
1448 u8 struct_v;
1449 u32 epoch = 0;
1450 void *start = *p;
1451 u32 max;
1452 u32 len, i;
1453 int err;
1454
1455 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1456
1457 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1458 if (err)
1459 goto bad;
1460
1461 /* fsid, epoch, created, modified */
1462 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1463 sizeof(map->created) + sizeof(map->modified), e_inval);
1464 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1465 epoch = map->epoch = ceph_decode_32(p);
1466 ceph_decode_copy(p, &map->created, sizeof(map->created));
1467 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1468
1469 /* pools */
1470 err = decode_pools(p, end, map);
1471 if (err)
1472 goto bad;
1473
1474 /* pool_name */
1475 err = decode_pool_names(p, end, map);
1476 if (err)
1477 goto bad;
1478
1479 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1480
1481 ceph_decode_32_safe(p, end, map->flags, e_inval);
1482
1483 /* max_osd */
1484 ceph_decode_32_safe(p, end, max, e_inval);
1485
1486 /* (re)alloc osd arrays */
1487 err = osdmap_set_max_osd(map, max);
1488 if (err)
1489 goto bad;
1490
1491 /* osd_state, osd_weight, osd_addrs->client_addr */
1492 ceph_decode_need(p, end, 3*sizeof(u32) +
1493 map->max_osd*((struct_v >= 5 ? sizeof(u32) :
1494 sizeof(u8)) +
1495 sizeof(*map->osd_weight) +
1496 sizeof(*map->osd_addr)), e_inval);
1497
1498 if (ceph_decode_32(p) != map->max_osd)
1499 goto e_inval;
1500
1501 if (struct_v >= 5) {
1502 for (i = 0; i < map->max_osd; i++)
1503 map->osd_state[i] = ceph_decode_32(p);
1504 } else {
1505 for (i = 0; i < map->max_osd; i++)
1506 map->osd_state[i] = ceph_decode_8(p);
1507 }
1508
1509 if (ceph_decode_32(p) != map->max_osd)
1510 goto e_inval;
1511
1512 for (i = 0; i < map->max_osd; i++)
1513 map->osd_weight[i] = ceph_decode_32(p);
1514
1515 if (ceph_decode_32(p) != map->max_osd)
1516 goto e_inval;
1517
1518 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1519 for (i = 0; i < map->max_osd; i++)
1520 ceph_decode_addr(&map->osd_addr[i]);
1521
1522 /* pg_temp */
1523 err = decode_pg_temp(p, end, map);
1524 if (err)
1525 goto bad;
1526
1527 /* primary_temp */
1528 if (struct_v >= 1) {
1529 err = decode_primary_temp(p, end, map);
1530 if (err)
1531 goto bad;
1532 }
1533
1534 /* primary_affinity */
1535 if (struct_v >= 2) {
1536 err = decode_primary_affinity(p, end, map);
1537 if (err)
1538 goto bad;
1539 } else {
1540 WARN_ON(map->osd_primary_affinity);
1541 }
1542
1543 /* crush */
1544 ceph_decode_32_safe(p, end, len, e_inval);
1545 err = osdmap_set_crush(map, crush_decode(*p, min(*p + len, end)));
1546 if (err)
1547 goto bad;
1548
1549 *p += len;
1550 if (struct_v >= 3) {
1551 /* erasure_code_profiles */
1552 ceph_decode_skip_map_of_map(p, end, string, string, string,
1553 e_inval);
1554 }
1555
1556 if (struct_v >= 4) {
1557 err = decode_pg_upmap(p, end, map);
1558 if (err)
1559 goto bad;
1560
1561 err = decode_pg_upmap_items(p, end, map);
1562 if (err)
1563 goto bad;
1564 } else {
1565 WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap));
1566 WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap_items));
1567 }
1568
1569 /* ignore the rest */
1570 *p = end;
1571
1572 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1573 return 0;
1574
1575 e_inval:
1576 err = -EINVAL;
1577 bad:
1578 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1579 err, epoch, (int)(*p - start), *p, start, end);
1580 print_hex_dump(KERN_DEBUG, "osdmap: ",
1581 DUMP_PREFIX_OFFSET, 16, 1,
1582 start, end - start, true);
1583 return err;
1584 }
1585
1586 /*
1587 * Allocate and decode a full map.
1588 */
1589 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1590 {
1591 struct ceph_osdmap *map;
1592 int ret;
1593
1594 map = ceph_osdmap_alloc();
1595 if (!map)
1596 return ERR_PTR(-ENOMEM);
1597
1598 ret = osdmap_decode(p, end, map);
1599 if (ret) {
1600 ceph_osdmap_destroy(map);
1601 return ERR_PTR(ret);
1602 }
1603
1604 return map;
1605 }
1606
1607 /*
1608 * Encoding order is (new_up_client, new_state, new_weight). Need to
1609 * apply in the (new_weight, new_state, new_up_client) order, because
1610 * an incremental map may look like e.g.
1611 *
1612 * new_up_client: { osd=6, addr=... } # set osd_state and addr
1613 * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
1614 */
1615 static int decode_new_up_state_weight(void **p, void *end, u8 struct_v,
1616 struct ceph_osdmap *map)
1617 {
1618 void *new_up_client;
1619 void *new_state;
1620 void *new_weight_end;
1621 u32 len;
1622
1623 new_up_client = *p;
1624 ceph_decode_32_safe(p, end, len, e_inval);
1625 len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
1626 ceph_decode_need(p, end, len, e_inval);
1627 *p += len;
1628
1629 new_state = *p;
1630 ceph_decode_32_safe(p, end, len, e_inval);
1631 len *= sizeof(u32) + (struct_v >= 5 ? sizeof(u32) : sizeof(u8));
1632 ceph_decode_need(p, end, len, e_inval);
1633 *p += len;
1634
1635 /* new_weight */
1636 ceph_decode_32_safe(p, end, len, e_inval);
1637 while (len--) {
1638 s32 osd;
1639 u32 w;
1640
1641 ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
1642 osd = ceph_decode_32(p);
1643 w = ceph_decode_32(p);
1644 BUG_ON(osd >= map->max_osd);
1645 pr_info("osd%d weight 0x%x %s\n", osd, w,
1646 w == CEPH_OSD_IN ? "(in)" :
1647 (w == CEPH_OSD_OUT ? "(out)" : ""));
1648 map->osd_weight[osd] = w;
1649
1650 /*
1651 * If we are marking in, set the EXISTS, and clear the
1652 * AUTOOUT and NEW bits.
1653 */
1654 if (w) {
1655 map->osd_state[osd] |= CEPH_OSD_EXISTS;
1656 map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
1657 CEPH_OSD_NEW);
1658 }
1659 }
1660 new_weight_end = *p;
1661
1662 /* new_state (up/down) */
1663 *p = new_state;
1664 len = ceph_decode_32(p);
1665 while (len--) {
1666 s32 osd;
1667 u32 xorstate;
1668 int ret;
1669
1670 osd = ceph_decode_32(p);
1671 if (struct_v >= 5)
1672 xorstate = ceph_decode_32(p);
1673 else
1674 xorstate = ceph_decode_8(p);
1675 if (xorstate == 0)
1676 xorstate = CEPH_OSD_UP;
1677 BUG_ON(osd >= map->max_osd);
1678 if ((map->osd_state[osd] & CEPH_OSD_UP) &&
1679 (xorstate & CEPH_OSD_UP))
1680 pr_info("osd%d down\n", osd);
1681 if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
1682 (xorstate & CEPH_OSD_EXISTS)) {
1683 pr_info("osd%d does not exist\n", osd);
1684 ret = set_primary_affinity(map, osd,
1685 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
1686 if (ret)
1687 return ret;
1688 memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
1689 map->osd_state[osd] = 0;
1690 } else {
1691 map->osd_state[osd] ^= xorstate;
1692 }
1693 }
1694
1695 /* new_up_client */
1696 *p = new_up_client;
1697 len = ceph_decode_32(p);
1698 while (len--) {
1699 s32 osd;
1700 struct ceph_entity_addr addr;
1701
1702 osd = ceph_decode_32(p);
1703 ceph_decode_copy(p, &addr, sizeof(addr));
1704 ceph_decode_addr(&addr);
1705 BUG_ON(osd >= map->max_osd);
1706 pr_info("osd%d up\n", osd);
1707 map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
1708 map->osd_addr[osd] = addr;
1709 }
1710
1711 *p = new_weight_end;
1712 return 0;
1713
1714 e_inval:
1715 return -EINVAL;
1716 }
1717
1718 /*
1719 * decode and apply an incremental map update.
1720 */
1721 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1722 struct ceph_osdmap *map)
1723 {
1724 struct ceph_fsid fsid;
1725 u32 epoch = 0;
1726 struct ceph_timespec modified;
1727 s32 len;
1728 u64 pool;
1729 __s64 new_pool_max;
1730 __s32 new_flags, max;
1731 void *start = *p;
1732 int err;
1733 u8 struct_v;
1734
1735 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1736
1737 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1738 if (err)
1739 goto bad;
1740
1741 /* fsid, epoch, modified, new_pool_max, new_flags */
1742 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1743 sizeof(u64) + sizeof(u32), e_inval);
1744 ceph_decode_copy(p, &fsid, sizeof(fsid));
1745 epoch = ceph_decode_32(p);
1746 BUG_ON(epoch != map->epoch+1);
1747 ceph_decode_copy(p, &modified, sizeof(modified));
1748 new_pool_max = ceph_decode_64(p);
1749 new_flags = ceph_decode_32(p);
1750
1751 /* full map? */
1752 ceph_decode_32_safe(p, end, len, e_inval);
1753 if (len > 0) {
1754 dout("apply_incremental full map len %d, %p to %p\n",
1755 len, *p, end);
1756 return ceph_osdmap_decode(p, min(*p+len, end));
1757 }
1758
1759 /* new crush? */
1760 ceph_decode_32_safe(p, end, len, e_inval);
1761 if (len > 0) {
1762 err = osdmap_set_crush(map,
1763 crush_decode(*p, min(*p + len, end)));
1764 if (err)
1765 goto bad;
1766 *p += len;
1767 }
1768
1769 /* new flags? */
1770 if (new_flags >= 0)
1771 map->flags = new_flags;
1772 if (new_pool_max >= 0)
1773 map->pool_max = new_pool_max;
1774
1775 /* new max? */
1776 ceph_decode_32_safe(p, end, max, e_inval);
1777 if (max >= 0) {
1778 err = osdmap_set_max_osd(map, max);
1779 if (err)
1780 goto bad;
1781 }
1782
1783 map->epoch++;
1784 map->modified = modified;
1785
1786 /* new_pools */
1787 err = decode_new_pools(p, end, map);
1788 if (err)
1789 goto bad;
1790
1791 /* new_pool_names */
1792 err = decode_pool_names(p, end, map);
1793 if (err)
1794 goto bad;
1795
1796 /* old_pool */
1797 ceph_decode_32_safe(p, end, len, e_inval);
1798 while (len--) {
1799 struct ceph_pg_pool_info *pi;
1800
1801 ceph_decode_64_safe(p, end, pool, e_inval);
1802 pi = __lookup_pg_pool(&map->pg_pools, pool);
1803 if (pi)
1804 __remove_pg_pool(&map->pg_pools, pi);
1805 }
1806
1807 /* new_up_client, new_state, new_weight */
1808 err = decode_new_up_state_weight(p, end, struct_v, map);
1809 if (err)
1810 goto bad;
1811
1812 /* new_pg_temp */
1813 err = decode_new_pg_temp(p, end, map);
1814 if (err)
1815 goto bad;
1816
1817 /* new_primary_temp */
1818 if (struct_v >= 1) {
1819 err = decode_new_primary_temp(p, end, map);
1820 if (err)
1821 goto bad;
1822 }
1823
1824 /* new_primary_affinity */
1825 if (struct_v >= 2) {
1826 err = decode_new_primary_affinity(p, end, map);
1827 if (err)
1828 goto bad;
1829 }
1830
1831 if (struct_v >= 3) {
1832 /* new_erasure_code_profiles */
1833 ceph_decode_skip_map_of_map(p, end, string, string, string,
1834 e_inval);
1835 /* old_erasure_code_profiles */
1836 ceph_decode_skip_set(p, end, string, e_inval);
1837 }
1838
1839 if (struct_v >= 4) {
1840 err = decode_new_pg_upmap(p, end, map);
1841 if (err)
1842 goto bad;
1843
1844 err = decode_old_pg_upmap(p, end, map);
1845 if (err)
1846 goto bad;
1847
1848 err = decode_new_pg_upmap_items(p, end, map);
1849 if (err)
1850 goto bad;
1851
1852 err = decode_old_pg_upmap_items(p, end, map);
1853 if (err)
1854 goto bad;
1855 }
1856
1857 /* ignore the rest */
1858 *p = end;
1859
1860 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1861 return map;
1862
1863 e_inval:
1864 err = -EINVAL;
1865 bad:
1866 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1867 err, epoch, (int)(*p - start), *p, start, end);
1868 print_hex_dump(KERN_DEBUG, "osdmap: ",
1869 DUMP_PREFIX_OFFSET, 16, 1,
1870 start, end - start, true);
1871 return ERR_PTR(err);
1872 }
1873
1874 void ceph_oloc_copy(struct ceph_object_locator *dest,
1875 const struct ceph_object_locator *src)
1876 {
1877 ceph_oloc_destroy(dest);
1878
1879 dest->pool = src->pool;
1880 if (src->pool_ns)
1881 dest->pool_ns = ceph_get_string(src->pool_ns);
1882 else
1883 dest->pool_ns = NULL;
1884 }
1885 EXPORT_SYMBOL(ceph_oloc_copy);
1886
1887 void ceph_oloc_destroy(struct ceph_object_locator *oloc)
1888 {
1889 ceph_put_string(oloc->pool_ns);
1890 }
1891 EXPORT_SYMBOL(ceph_oloc_destroy);
1892
1893 void ceph_oid_copy(struct ceph_object_id *dest,
1894 const struct ceph_object_id *src)
1895 {
1896 ceph_oid_destroy(dest);
1897
1898 if (src->name != src->inline_name) {
1899 /* very rare, see ceph_object_id definition */
1900 dest->name = kmalloc(src->name_len + 1,
1901 GFP_NOIO | __GFP_NOFAIL);
1902 } else {
1903 dest->name = dest->inline_name;
1904 }
1905 memcpy(dest->name, src->name, src->name_len + 1);
1906 dest->name_len = src->name_len;
1907 }
1908 EXPORT_SYMBOL(ceph_oid_copy);
1909
1910 static __printf(2, 0)
1911 int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1912 {
1913 int len;
1914
1915 WARN_ON(!ceph_oid_empty(oid));
1916
1917 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1918 if (len >= sizeof(oid->inline_name))
1919 return len;
1920
1921 oid->name_len = len;
1922 return 0;
1923 }
1924
1925 /*
1926 * If oid doesn't fit into inline buffer, BUG.
1927 */
1928 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1929 {
1930 va_list ap;
1931
1932 va_start(ap, fmt);
1933 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1934 va_end(ap);
1935 }
1936 EXPORT_SYMBOL(ceph_oid_printf);
1937
1938 static __printf(3, 0)
1939 int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1940 const char *fmt, va_list ap)
1941 {
1942 va_list aq;
1943 int len;
1944
1945 va_copy(aq, ap);
1946 len = oid_printf_vargs(oid, fmt, aq);
1947 va_end(aq);
1948
1949 if (len) {
1950 char *external_name;
1951
1952 external_name = kmalloc(len + 1, gfp);
1953 if (!external_name)
1954 return -ENOMEM;
1955
1956 oid->name = external_name;
1957 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1958 oid->name_len = len;
1959 }
1960
1961 return 0;
1962 }
1963
1964 /*
1965 * If oid doesn't fit into inline buffer, allocate.
1966 */
1967 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1968 const char *fmt, ...)
1969 {
1970 va_list ap;
1971 int ret;
1972
1973 va_start(ap, fmt);
1974 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1975 va_end(ap);
1976
1977 return ret;
1978 }
1979 EXPORT_SYMBOL(ceph_oid_aprintf);
1980
1981 void ceph_oid_destroy(struct ceph_object_id *oid)
1982 {
1983 if (oid->name != oid->inline_name)
1984 kfree(oid->name);
1985 }
1986 EXPORT_SYMBOL(ceph_oid_destroy);
1987
1988 /*
1989 * osds only
1990 */
1991 static bool __osds_equal(const struct ceph_osds *lhs,
1992 const struct ceph_osds *rhs)
1993 {
1994 if (lhs->size == rhs->size &&
1995 !memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
1996 return true;
1997
1998 return false;
1999 }
2000
2001 /*
2002 * osds + primary
2003 */
2004 static bool osds_equal(const struct ceph_osds *lhs,
2005 const struct ceph_osds *rhs)
2006 {
2007 if (__osds_equal(lhs, rhs) &&
2008 lhs->primary == rhs->primary)
2009 return true;
2010
2011 return false;
2012 }
2013
2014 static bool osds_valid(const struct ceph_osds *set)
2015 {
2016 /* non-empty set */
2017 if (set->size > 0 && set->primary >= 0)
2018 return true;
2019
2020 /* empty can_shift_osds set */
2021 if (!set->size && set->primary == -1)
2022 return true;
2023
2024 /* empty !can_shift_osds set - all NONE */
2025 if (set->size > 0 && set->primary == -1) {
2026 int i;
2027
2028 for (i = 0; i < set->size; i++) {
2029 if (set->osds[i] != CRUSH_ITEM_NONE)
2030 break;
2031 }
2032 if (i == set->size)
2033 return true;
2034 }
2035
2036 return false;
2037 }
2038
2039 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
2040 {
2041 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
2042 dest->size = src->size;
2043 dest->primary = src->primary;
2044 }
2045
2046 bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
2047 u32 new_pg_num)
2048 {
2049 int old_bits = calc_bits_of(old_pg_num);
2050 int old_mask = (1 << old_bits) - 1;
2051 int n;
2052
2053 WARN_ON(pgid->seed >= old_pg_num);
2054 if (new_pg_num <= old_pg_num)
2055 return false;
2056
2057 for (n = 1; ; n++) {
2058 int next_bit = n << (old_bits - 1);
2059 u32 s = next_bit | pgid->seed;
2060
2061 if (s < old_pg_num || s == pgid->seed)
2062 continue;
2063 if (s >= new_pg_num)
2064 break;
2065
2066 s = ceph_stable_mod(s, old_pg_num, old_mask);
2067 if (s == pgid->seed)
2068 return true;
2069 }
2070
2071 return false;
2072 }
2073
2074 bool ceph_is_new_interval(const struct ceph_osds *old_acting,
2075 const struct ceph_osds *new_acting,
2076 const struct ceph_osds *old_up,
2077 const struct ceph_osds *new_up,
2078 int old_size,
2079 int new_size,
2080 int old_min_size,
2081 int new_min_size,
2082 u32 old_pg_num,
2083 u32 new_pg_num,
2084 bool old_sort_bitwise,
2085 bool new_sort_bitwise,
2086 bool old_recovery_deletes,
2087 bool new_recovery_deletes,
2088 const struct ceph_pg *pgid)
2089 {
2090 return !osds_equal(old_acting, new_acting) ||
2091 !osds_equal(old_up, new_up) ||
2092 old_size != new_size ||
2093 old_min_size != new_min_size ||
2094 ceph_pg_is_split(pgid, old_pg_num, new_pg_num) ||
2095 old_sort_bitwise != new_sort_bitwise ||
2096 old_recovery_deletes != new_recovery_deletes;
2097 }
2098
2099 static int calc_pg_rank(int osd, const struct ceph_osds *acting)
2100 {
2101 int i;
2102
2103 for (i = 0; i < acting->size; i++) {
2104 if (acting->osds[i] == osd)
2105 return i;
2106 }
2107
2108 return -1;
2109 }
2110
2111 static bool primary_changed(const struct ceph_osds *old_acting,
2112 const struct ceph_osds *new_acting)
2113 {
2114 if (!old_acting->size && !new_acting->size)
2115 return false; /* both still empty */
2116
2117 if (!old_acting->size ^ !new_acting->size)
2118 return true; /* was empty, now not, or vice versa */
2119
2120 if (old_acting->primary != new_acting->primary)
2121 return true; /* primary changed */
2122
2123 if (calc_pg_rank(old_acting->primary, old_acting) !=
2124 calc_pg_rank(new_acting->primary, new_acting))
2125 return true;
2126
2127 return false; /* same primary (tho replicas may have changed) */
2128 }
2129
2130 bool ceph_osds_changed(const struct ceph_osds *old_acting,
2131 const struct ceph_osds *new_acting,
2132 bool any_change)
2133 {
2134 if (primary_changed(old_acting, new_acting))
2135 return true;
2136
2137 if (any_change && !__osds_equal(old_acting, new_acting))
2138 return true;
2139
2140 return false;
2141 }
2142
2143 /*
2144 * calculate file layout from given offset, length.
2145 * fill in correct oid, logical length, and object extent
2146 * offset, length.
2147 *
2148 * for now, we write only a single su, until we can
2149 * pass a stride back to the caller.
2150 */
2151 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
2152 u64 off, u64 len,
2153 u64 *ono,
2154 u64 *oxoff, u64 *oxlen)
2155 {
2156 u32 osize = layout->object_size;
2157 u32 su = layout->stripe_unit;
2158 u32 sc = layout->stripe_count;
2159 u32 bl, stripeno, stripepos, objsetno;
2160 u32 su_per_object;
2161 u64 t, su_offset;
2162
2163 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
2164 osize, su);
2165 if (su == 0 || sc == 0)
2166 goto invalid;
2167 su_per_object = osize / su;
2168 if (su_per_object == 0)
2169 goto invalid;
2170 dout("osize %u / su %u = su_per_object %u\n", osize, su,
2171 su_per_object);
2172
2173 if ((su & ~PAGE_MASK) != 0)
2174 goto invalid;
2175
2176 /* bl = *off / su; */
2177 t = off;
2178 do_div(t, su);
2179 bl = t;
2180 dout("off %llu / su %u = bl %u\n", off, su, bl);
2181
2182 stripeno = bl / sc;
2183 stripepos = bl % sc;
2184 objsetno = stripeno / su_per_object;
2185
2186 *ono = objsetno * sc + stripepos;
2187 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
2188
2189 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
2190 t = off;
2191 su_offset = do_div(t, su);
2192 *oxoff = su_offset + (stripeno % su_per_object) * su;
2193
2194 /*
2195 * Calculate the length of the extent being written to the selected
2196 * object. This is the minimum of the full length requested (len) or
2197 * the remainder of the current stripe being written to.
2198 */
2199 *oxlen = min_t(u64, len, su - su_offset);
2200
2201 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
2202 return 0;
2203
2204 invalid:
2205 dout(" invalid layout\n");
2206 *ono = 0;
2207 *oxoff = 0;
2208 *oxlen = 0;
2209 return -EINVAL;
2210 }
2211 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
2212
2213 /*
2214 * Map an object into a PG.
2215 *
2216 * Should only be called with target_oid and target_oloc (as opposed to
2217 * base_oid and base_oloc), since tiering isn't taken into account.
2218 */
2219 int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
2220 const struct ceph_object_id *oid,
2221 const struct ceph_object_locator *oloc,
2222 struct ceph_pg *raw_pgid)
2223 {
2224 WARN_ON(pi->id != oloc->pool);
2225
2226 if (!oloc->pool_ns) {
2227 raw_pgid->pool = oloc->pool;
2228 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
2229 oid->name_len);
2230 dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
2231 raw_pgid->pool, raw_pgid->seed);
2232 } else {
2233 char stack_buf[256];
2234 char *buf = stack_buf;
2235 int nsl = oloc->pool_ns->len;
2236 size_t total = nsl + 1 + oid->name_len;
2237
2238 if (total > sizeof(stack_buf)) {
2239 buf = kmalloc(total, GFP_NOIO);
2240 if (!buf)
2241 return -ENOMEM;
2242 }
2243 memcpy(buf, oloc->pool_ns->str, nsl);
2244 buf[nsl] = '\037';
2245 memcpy(buf + nsl + 1, oid->name, oid->name_len);
2246 raw_pgid->pool = oloc->pool;
2247 raw_pgid->seed = ceph_str_hash(pi->object_hash, buf, total);
2248 if (buf != stack_buf)
2249 kfree(buf);
2250 dout("%s %s ns %.*s -> raw_pgid %llu.%x\n", __func__,
2251 oid->name, nsl, oloc->pool_ns->str,
2252 raw_pgid->pool, raw_pgid->seed);
2253 }
2254 return 0;
2255 }
2256
2257 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
2258 const struct ceph_object_id *oid,
2259 const struct ceph_object_locator *oloc,
2260 struct ceph_pg *raw_pgid)
2261 {
2262 struct ceph_pg_pool_info *pi;
2263
2264 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
2265 if (!pi)
2266 return -ENOENT;
2267
2268 return __ceph_object_locator_to_pg(pi, oid, oloc, raw_pgid);
2269 }
2270 EXPORT_SYMBOL(ceph_object_locator_to_pg);
2271
2272 /*
2273 * Map a raw PG (full precision ps) into an actual PG.
2274 */
2275 static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
2276 const struct ceph_pg *raw_pgid,
2277 struct ceph_pg *pgid)
2278 {
2279 pgid->pool = raw_pgid->pool;
2280 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
2281 pi->pg_num_mask);
2282 }
2283
2284 /*
2285 * Map a raw PG (full precision ps) into a placement ps (placement
2286 * seed). Include pool id in that value so that different pools don't
2287 * use the same seeds.
2288 */
2289 static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
2290 const struct ceph_pg *raw_pgid)
2291 {
2292 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
2293 /* hash pool id and seed so that pool PGs do not overlap */
2294 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
2295 ceph_stable_mod(raw_pgid->seed,
2296 pi->pgp_num,
2297 pi->pgp_num_mask),
2298 raw_pgid->pool);
2299 } else {
2300 /*
2301 * legacy behavior: add ps and pool together. this is
2302 * not a great approach because the PGs from each pool
2303 * will overlap on top of each other: 0.5 == 1.4 ==
2304 * 2.3 == ...
2305 */
2306 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
2307 pi->pgp_num_mask) +
2308 (unsigned)raw_pgid->pool;
2309 }
2310 }
2311
2312 /*
2313 * Magic value used for a "default" fallback choose_args, used if the
2314 * crush_choose_arg_map passed to do_crush() does not exist. If this
2315 * also doesn't exist, fall back to canonical weights.
2316 */
2317 #define CEPH_DEFAULT_CHOOSE_ARGS -1
2318
2319 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
2320 int *result, int result_max,
2321 const __u32 *weight, int weight_max,
2322 s64 choose_args_index)
2323 {
2324 struct crush_choose_arg_map *arg_map;
2325 int r;
2326
2327 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
2328
2329 arg_map = lookup_choose_arg_map(&map->crush->choose_args,
2330 choose_args_index);
2331 if (!arg_map)
2332 arg_map = lookup_choose_arg_map(&map->crush->choose_args,
2333 CEPH_DEFAULT_CHOOSE_ARGS);
2334
2335 mutex_lock(&map->crush_workspace_mutex);
2336 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
2337 weight, weight_max, map->crush_workspace,
2338 arg_map ? arg_map->args : NULL);
2339 mutex_unlock(&map->crush_workspace_mutex);
2340
2341 return r;
2342 }
2343
2344 static void remove_nonexistent_osds(struct ceph_osdmap *osdmap,
2345 struct ceph_pg_pool_info *pi,
2346 struct ceph_osds *set)
2347 {
2348 int i;
2349
2350 if (ceph_can_shift_osds(pi)) {
2351 int removed = 0;
2352
2353 /* shift left */
2354 for (i = 0; i < set->size; i++) {
2355 if (!ceph_osd_exists(osdmap, set->osds[i])) {
2356 removed++;
2357 continue;
2358 }
2359 if (removed)
2360 set->osds[i - removed] = set->osds[i];
2361 }
2362 set->size -= removed;
2363 } else {
2364 /* set dne devices to NONE */
2365 for (i = 0; i < set->size; i++) {
2366 if (!ceph_osd_exists(osdmap, set->osds[i]))
2367 set->osds[i] = CRUSH_ITEM_NONE;
2368 }
2369 }
2370 }
2371
2372 /*
2373 * Calculate raw set (CRUSH output) for given PG and filter out
2374 * nonexistent OSDs. ->primary is undefined for a raw set.
2375 *
2376 * Placement seed (CRUSH input) is returned through @ppps.
2377 */
2378 static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
2379 struct ceph_pg_pool_info *pi,
2380 const struct ceph_pg *raw_pgid,
2381 struct ceph_osds *raw,
2382 u32 *ppps)
2383 {
2384 u32 pps = raw_pg_to_pps(pi, raw_pgid);
2385 int ruleno;
2386 int len;
2387
2388 ceph_osds_init(raw);
2389 if (ppps)
2390 *ppps = pps;
2391
2392 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
2393 pi->size);
2394 if (ruleno < 0) {
2395 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
2396 pi->id, pi->crush_ruleset, pi->type, pi->size);
2397 return;
2398 }
2399
2400 if (pi->size > ARRAY_SIZE(raw->osds)) {
2401 pr_err_ratelimited("pool %lld ruleset %d type %d too wide: size %d > %zu\n",
2402 pi->id, pi->crush_ruleset, pi->type, pi->size,
2403 ARRAY_SIZE(raw->osds));
2404 return;
2405 }
2406
2407 len = do_crush(osdmap, ruleno, pps, raw->osds, pi->size,
2408 osdmap->osd_weight, osdmap->max_osd, pi->id);
2409 if (len < 0) {
2410 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
2411 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
2412 pi->size);
2413 return;
2414 }
2415
2416 raw->size = len;
2417 remove_nonexistent_osds(osdmap, pi, raw);
2418 }
2419
2420 /* apply pg_upmap[_items] mappings */
2421 static void apply_upmap(struct ceph_osdmap *osdmap,
2422 const struct ceph_pg *pgid,
2423 struct ceph_osds *raw)
2424 {
2425 struct ceph_pg_mapping *pg;
2426 int i, j;
2427
2428 pg = lookup_pg_mapping(&osdmap->pg_upmap, pgid);
2429 if (pg) {
2430 /* make sure targets aren't marked out */
2431 for (i = 0; i < pg->pg_upmap.len; i++) {
2432 int osd = pg->pg_upmap.osds[i];
2433
2434 if (osd != CRUSH_ITEM_NONE &&
2435 osd < osdmap->max_osd &&
2436 osdmap->osd_weight[osd] == 0) {
2437 /* reject/ignore explicit mapping */
2438 return;
2439 }
2440 }
2441 for (i = 0; i < pg->pg_upmap.len; i++)
2442 raw->osds[i] = pg->pg_upmap.osds[i];
2443 raw->size = pg->pg_upmap.len;
2444 /* check and apply pg_upmap_items, if any */
2445 }
2446
2447 pg = lookup_pg_mapping(&osdmap->pg_upmap_items, pgid);
2448 if (pg) {
2449 /*
2450 * Note: this approach does not allow a bidirectional swap,
2451 * e.g., [[1,2],[2,1]] applied to [0,1,2] -> [0,2,1].
2452 */
2453 for (i = 0; i < pg->pg_upmap_items.len; i++) {
2454 int from = pg->pg_upmap_items.from_to[i][0];
2455 int to = pg->pg_upmap_items.from_to[i][1];
2456 int pos = -1;
2457 bool exists = false;
2458
2459 /* make sure replacement doesn't already appear */
2460 for (j = 0; j < raw->size; j++) {
2461 int osd = raw->osds[j];
2462
2463 if (osd == to) {
2464 exists = true;
2465 break;
2466 }
2467 /* ignore mapping if target is marked out */
2468 if (osd == from && pos < 0 &&
2469 !(to != CRUSH_ITEM_NONE &&
2470 to < osdmap->max_osd &&
2471 osdmap->osd_weight[to] == 0)) {
2472 pos = j;
2473 }
2474 }
2475 if (!exists && pos >= 0)
2476 raw->osds[pos] = to;
2477 }
2478 }
2479 }
2480
2481 /*
2482 * Given raw set, calculate up set and up primary. By definition of an
2483 * up set, the result won't contain nonexistent or down OSDs.
2484 *
2485 * This is done in-place - on return @set is the up set. If it's
2486 * empty, ->primary will remain undefined.
2487 */
2488 static void raw_to_up_osds(struct ceph_osdmap *osdmap,
2489 struct ceph_pg_pool_info *pi,
2490 struct ceph_osds *set)
2491 {
2492 int i;
2493
2494 /* ->primary is undefined for a raw set */
2495 BUG_ON(set->primary != -1);
2496
2497 if (ceph_can_shift_osds(pi)) {
2498 int removed = 0;
2499
2500 /* shift left */
2501 for (i = 0; i < set->size; i++) {
2502 if (ceph_osd_is_down(osdmap, set->osds[i])) {
2503 removed++;
2504 continue;
2505 }
2506 if (removed)
2507 set->osds[i - removed] = set->osds[i];
2508 }
2509 set->size -= removed;
2510 if (set->size > 0)
2511 set->primary = set->osds[0];
2512 } else {
2513 /* set down/dne devices to NONE */
2514 for (i = set->size - 1; i >= 0; i--) {
2515 if (ceph_osd_is_down(osdmap, set->osds[i]))
2516 set->osds[i] = CRUSH_ITEM_NONE;
2517 else
2518 set->primary = set->osds[i];
2519 }
2520 }
2521 }
2522
2523 static void apply_primary_affinity(struct ceph_osdmap *osdmap,
2524 struct ceph_pg_pool_info *pi,
2525 u32 pps,
2526 struct ceph_osds *up)
2527 {
2528 int i;
2529 int pos = -1;
2530
2531 /*
2532 * Do we have any non-default primary_affinity values for these
2533 * osds?
2534 */
2535 if (!osdmap->osd_primary_affinity)
2536 return;
2537
2538 for (i = 0; i < up->size; i++) {
2539 int osd = up->osds[i];
2540
2541 if (osd != CRUSH_ITEM_NONE &&
2542 osdmap->osd_primary_affinity[osd] !=
2543 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
2544 break;
2545 }
2546 }
2547 if (i == up->size)
2548 return;
2549
2550 /*
2551 * Pick the primary. Feed both the seed (for the pg) and the
2552 * osd into the hash/rng so that a proportional fraction of an
2553 * osd's pgs get rejected as primary.
2554 */
2555 for (i = 0; i < up->size; i++) {
2556 int osd = up->osds[i];
2557 u32 aff;
2558
2559 if (osd == CRUSH_ITEM_NONE)
2560 continue;
2561
2562 aff = osdmap->osd_primary_affinity[osd];
2563 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
2564 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
2565 pps, osd) >> 16) >= aff) {
2566 /*
2567 * We chose not to use this primary. Note it
2568 * anyway as a fallback in case we don't pick
2569 * anyone else, but keep looking.
2570 */
2571 if (pos < 0)
2572 pos = i;
2573 } else {
2574 pos = i;
2575 break;
2576 }
2577 }
2578 if (pos < 0)
2579 return;
2580
2581 up->primary = up->osds[pos];
2582
2583 if (ceph_can_shift_osds(pi) && pos > 0) {
2584 /* move the new primary to the front */
2585 for (i = pos; i > 0; i--)
2586 up->osds[i] = up->osds[i - 1];
2587 up->osds[0] = up->primary;
2588 }
2589 }
2590
2591 /*
2592 * Get pg_temp and primary_temp mappings for given PG.
2593 *
2594 * Note that a PG may have none, only pg_temp, only primary_temp or
2595 * both pg_temp and primary_temp mappings. This means @temp isn't
2596 * always a valid OSD set on return: in the "only primary_temp" case,
2597 * @temp will have its ->primary >= 0 but ->size == 0.
2598 */
2599 static void get_temp_osds(struct ceph_osdmap *osdmap,
2600 struct ceph_pg_pool_info *pi,
2601 const struct ceph_pg *pgid,
2602 struct ceph_osds *temp)
2603 {
2604 struct ceph_pg_mapping *pg;
2605 int i;
2606
2607 ceph_osds_init(temp);
2608
2609 /* pg_temp? */
2610 pg = lookup_pg_mapping(&osdmap->pg_temp, pgid);
2611 if (pg) {
2612 for (i = 0; i < pg->pg_temp.len; i++) {
2613 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2614 if (ceph_can_shift_osds(pi))
2615 continue;
2616
2617 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
2618 } else {
2619 temp->osds[temp->size++] = pg->pg_temp.osds[i];
2620 }
2621 }
2622
2623 /* apply pg_temp's primary */
2624 for (i = 0; i < temp->size; i++) {
2625 if (temp->osds[i] != CRUSH_ITEM_NONE) {
2626 temp->primary = temp->osds[i];
2627 break;
2628 }
2629 }
2630 }
2631
2632 /* primary_temp? */
2633 pg = lookup_pg_mapping(&osdmap->primary_temp, pgid);
2634 if (pg)
2635 temp->primary = pg->primary_temp.osd;
2636 }
2637
2638 /*
2639 * Map a PG to its acting set as well as its up set.
2640 *
2641 * Acting set is used for data mapping purposes, while up set can be
2642 * recorded for detecting interval changes and deciding whether to
2643 * resend a request.
2644 */
2645 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
2646 struct ceph_pg_pool_info *pi,
2647 const struct ceph_pg *raw_pgid,
2648 struct ceph_osds *up,
2649 struct ceph_osds *acting)
2650 {
2651 struct ceph_pg pgid;
2652 u32 pps;
2653
2654 WARN_ON(pi->id != raw_pgid->pool);
2655 raw_pg_to_pg(pi, raw_pgid, &pgid);
2656
2657 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
2658 apply_upmap(osdmap, &pgid, up);
2659 raw_to_up_osds(osdmap, pi, up);
2660 apply_primary_affinity(osdmap, pi, pps, up);
2661 get_temp_osds(osdmap, pi, &pgid, acting);
2662 if (!acting->size) {
2663 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
2664 acting->size = up->size;
2665 if (acting->primary == -1)
2666 acting->primary = up->primary;
2667 }
2668 WARN_ON(!osds_valid(up) || !osds_valid(acting));
2669 }
2670
2671 bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
2672 struct ceph_pg_pool_info *pi,
2673 const struct ceph_pg *raw_pgid,
2674 struct ceph_spg *spgid)
2675 {
2676 struct ceph_pg pgid;
2677 struct ceph_osds up, acting;
2678 int i;
2679
2680 WARN_ON(pi->id != raw_pgid->pool);
2681 raw_pg_to_pg(pi, raw_pgid, &pgid);
2682
2683 if (ceph_can_shift_osds(pi)) {
2684 spgid->pgid = pgid; /* struct */
2685 spgid->shard = CEPH_SPG_NOSHARD;
2686 return true;
2687 }
2688
2689 ceph_pg_to_up_acting_osds(osdmap, pi, &pgid, &up, &acting);
2690 for (i = 0; i < acting.size; i++) {
2691 if (acting.osds[i] == acting.primary) {
2692 spgid->pgid = pgid; /* struct */
2693 spgid->shard = i;
2694 return true;
2695 }
2696 }
2697
2698 return false;
2699 }
2700
2701 /*
2702 * Return acting primary for given PG, or -1 if none.
2703 */
2704 int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
2705 const struct ceph_pg *raw_pgid)
2706 {
2707 struct ceph_pg_pool_info *pi;
2708 struct ceph_osds up, acting;
2709
2710 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
2711 if (!pi)
2712 return -1;
2713
2714 ceph_pg_to_up_acting_osds(osdmap, pi, raw_pgid, &up, &acting);
2715 return acting.primary;
2716 }
2717 EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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