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[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / net / ceph / osdmap.c
1
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/module.h>
5 #include <linux/slab.h>
6 #include <asm/div64.h>
7
8 #include <linux/ceph/libceph.h>
9 #include <linux/ceph/osdmap.h>
10 #include <linux/ceph/decode.h>
11 #include <linux/crush/hash.h>
12 #include <linux/crush/mapper.h>
13
14 char *ceph_osdmap_state_str(char *str, int len, int state)
15 {
16 if (!len)
17 return str;
18
19 if ((state & CEPH_OSD_EXISTS) && (state & CEPH_OSD_UP))
20 snprintf(str, len, "exists, up");
21 else if (state & CEPH_OSD_EXISTS)
22 snprintf(str, len, "exists");
23 else if (state & CEPH_OSD_UP)
24 snprintf(str, len, "up");
25 else
26 snprintf(str, len, "doesn't exist");
27
28 return str;
29 }
30
31 /* maps */
32
33 static int calc_bits_of(unsigned int t)
34 {
35 int b = 0;
36 while (t) {
37 t = t >> 1;
38 b++;
39 }
40 return b;
41 }
42
43 /*
44 * the foo_mask is the smallest value 2^n-1 that is >= foo.
45 */
46 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
47 {
48 pi->pg_num_mask = (1 << calc_bits_of(pi->pg_num-1)) - 1;
49 pi->pgp_num_mask = (1 << calc_bits_of(pi->pgp_num-1)) - 1;
50 }
51
52 /*
53 * decode crush map
54 */
55 static int crush_decode_uniform_bucket(void **p, void *end,
56 struct crush_bucket_uniform *b)
57 {
58 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
59 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
60 b->item_weight = ceph_decode_32(p);
61 return 0;
62 bad:
63 return -EINVAL;
64 }
65
66 static int crush_decode_list_bucket(void **p, void *end,
67 struct crush_bucket_list *b)
68 {
69 int j;
70 dout("crush_decode_list_bucket %p to %p\n", *p, end);
71 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
72 if (b->item_weights == NULL)
73 return -ENOMEM;
74 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
75 if (b->sum_weights == NULL)
76 return -ENOMEM;
77 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
78 for (j = 0; j < b->h.size; j++) {
79 b->item_weights[j] = ceph_decode_32(p);
80 b->sum_weights[j] = ceph_decode_32(p);
81 }
82 return 0;
83 bad:
84 return -EINVAL;
85 }
86
87 static int crush_decode_tree_bucket(void **p, void *end,
88 struct crush_bucket_tree *b)
89 {
90 int j;
91 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
92 ceph_decode_8_safe(p, end, b->num_nodes, bad);
93 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
94 if (b->node_weights == NULL)
95 return -ENOMEM;
96 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
97 for (j = 0; j < b->num_nodes; j++)
98 b->node_weights[j] = ceph_decode_32(p);
99 return 0;
100 bad:
101 return -EINVAL;
102 }
103
104 static int crush_decode_straw_bucket(void **p, void *end,
105 struct crush_bucket_straw *b)
106 {
107 int j;
108 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
109 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
110 if (b->item_weights == NULL)
111 return -ENOMEM;
112 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
113 if (b->straws == NULL)
114 return -ENOMEM;
115 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
116 for (j = 0; j < b->h.size; j++) {
117 b->item_weights[j] = ceph_decode_32(p);
118 b->straws[j] = ceph_decode_32(p);
119 }
120 return 0;
121 bad:
122 return -EINVAL;
123 }
124
125 static int crush_decode_straw2_bucket(void **p, void *end,
126 struct crush_bucket_straw2 *b)
127 {
128 int j;
129 dout("crush_decode_straw2_bucket %p to %p\n", *p, end);
130 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
131 if (b->item_weights == NULL)
132 return -ENOMEM;
133 ceph_decode_need(p, end, b->h.size * sizeof(u32), bad);
134 for (j = 0; j < b->h.size; j++)
135 b->item_weights[j] = ceph_decode_32(p);
136 return 0;
137 bad:
138 return -EINVAL;
139 }
140
141 static int skip_name_map(void **p, void *end)
142 {
143 int len;
144 ceph_decode_32_safe(p, end, len ,bad);
145 while (len--) {
146 int strlen;
147 *p += sizeof(u32);
148 ceph_decode_32_safe(p, end, strlen, bad);
149 *p += strlen;
150 }
151 return 0;
152 bad:
153 return -EINVAL;
154 }
155
156 static struct crush_map *crush_decode(void *pbyval, void *end)
157 {
158 struct crush_map *c;
159 int err = -EINVAL;
160 int i, j;
161 void **p = &pbyval;
162 void *start = pbyval;
163 u32 magic;
164 u32 num_name_maps;
165
166 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
167
168 c = kzalloc(sizeof(*c), GFP_NOFS);
169 if (c == NULL)
170 return ERR_PTR(-ENOMEM);
171
172 /* set tunables to default values */
173 c->choose_local_tries = 2;
174 c->choose_local_fallback_tries = 5;
175 c->choose_total_tries = 19;
176 c->chooseleaf_descend_once = 0;
177
178 ceph_decode_need(p, end, 4*sizeof(u32), bad);
179 magic = ceph_decode_32(p);
180 if (magic != CRUSH_MAGIC) {
181 pr_err("crush_decode magic %x != current %x\n",
182 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
183 goto bad;
184 }
185 c->max_buckets = ceph_decode_32(p);
186 c->max_rules = ceph_decode_32(p);
187 c->max_devices = ceph_decode_32(p);
188
189 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
190 if (c->buckets == NULL)
191 goto badmem;
192 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
193 if (c->rules == NULL)
194 goto badmem;
195
196 /* buckets */
197 for (i = 0; i < c->max_buckets; i++) {
198 int size = 0;
199 u32 alg;
200 struct crush_bucket *b;
201
202 ceph_decode_32_safe(p, end, alg, bad);
203 if (alg == 0) {
204 c->buckets[i] = NULL;
205 continue;
206 }
207 dout("crush_decode bucket %d off %x %p to %p\n",
208 i, (int)(*p-start), *p, end);
209
210 switch (alg) {
211 case CRUSH_BUCKET_UNIFORM:
212 size = sizeof(struct crush_bucket_uniform);
213 break;
214 case CRUSH_BUCKET_LIST:
215 size = sizeof(struct crush_bucket_list);
216 break;
217 case CRUSH_BUCKET_TREE:
218 size = sizeof(struct crush_bucket_tree);
219 break;
220 case CRUSH_BUCKET_STRAW:
221 size = sizeof(struct crush_bucket_straw);
222 break;
223 case CRUSH_BUCKET_STRAW2:
224 size = sizeof(struct crush_bucket_straw2);
225 break;
226 default:
227 err = -EINVAL;
228 goto bad;
229 }
230 BUG_ON(size == 0);
231 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
232 if (b == NULL)
233 goto badmem;
234
235 ceph_decode_need(p, end, 4*sizeof(u32), bad);
236 b->id = ceph_decode_32(p);
237 b->type = ceph_decode_16(p);
238 b->alg = ceph_decode_8(p);
239 b->hash = ceph_decode_8(p);
240 b->weight = ceph_decode_32(p);
241 b->size = ceph_decode_32(p);
242
243 dout("crush_decode bucket size %d off %x %p to %p\n",
244 b->size, (int)(*p-start), *p, end);
245
246 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
247 if (b->items == NULL)
248 goto badmem;
249 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
250 if (b->perm == NULL)
251 goto badmem;
252 b->perm_n = 0;
253
254 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
255 for (j = 0; j < b->size; j++)
256 b->items[j] = ceph_decode_32(p);
257
258 switch (b->alg) {
259 case CRUSH_BUCKET_UNIFORM:
260 err = crush_decode_uniform_bucket(p, end,
261 (struct crush_bucket_uniform *)b);
262 if (err < 0)
263 goto bad;
264 break;
265 case CRUSH_BUCKET_LIST:
266 err = crush_decode_list_bucket(p, end,
267 (struct crush_bucket_list *)b);
268 if (err < 0)
269 goto bad;
270 break;
271 case CRUSH_BUCKET_TREE:
272 err = crush_decode_tree_bucket(p, end,
273 (struct crush_bucket_tree *)b);
274 if (err < 0)
275 goto bad;
276 break;
277 case CRUSH_BUCKET_STRAW:
278 err = crush_decode_straw_bucket(p, end,
279 (struct crush_bucket_straw *)b);
280 if (err < 0)
281 goto bad;
282 break;
283 case CRUSH_BUCKET_STRAW2:
284 err = crush_decode_straw2_bucket(p, end,
285 (struct crush_bucket_straw2 *)b);
286 if (err < 0)
287 goto bad;
288 break;
289 }
290 }
291
292 /* rules */
293 dout("rule vec is %p\n", c->rules);
294 for (i = 0; i < c->max_rules; i++) {
295 u32 yes;
296 struct crush_rule *r;
297
298 ceph_decode_32_safe(p, end, yes, bad);
299 if (!yes) {
300 dout("crush_decode NO rule %d off %x %p to %p\n",
301 i, (int)(*p-start), *p, end);
302 c->rules[i] = NULL;
303 continue;
304 }
305
306 dout("crush_decode rule %d off %x %p to %p\n",
307 i, (int)(*p-start), *p, end);
308
309 /* len */
310 ceph_decode_32_safe(p, end, yes, bad);
311 #if BITS_PER_LONG == 32
312 err = -EINVAL;
313 if (yes > (ULONG_MAX - sizeof(*r))
314 / sizeof(struct crush_rule_step))
315 goto bad;
316 #endif
317 r = c->rules[i] = kmalloc(sizeof(*r) +
318 yes*sizeof(struct crush_rule_step),
319 GFP_NOFS);
320 if (r == NULL)
321 goto badmem;
322 dout(" rule %d is at %p\n", i, r);
323 r->len = yes;
324 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
325 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
326 for (j = 0; j < r->len; j++) {
327 r->steps[j].op = ceph_decode_32(p);
328 r->steps[j].arg1 = ceph_decode_32(p);
329 r->steps[j].arg2 = ceph_decode_32(p);
330 }
331 }
332
333 /* ignore trailing name maps. */
334 for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) {
335 err = skip_name_map(p, end);
336 if (err < 0)
337 goto done;
338 }
339
340 /* tunables */
341 ceph_decode_need(p, end, 3*sizeof(u32), done);
342 c->choose_local_tries = ceph_decode_32(p);
343 c->choose_local_fallback_tries = ceph_decode_32(p);
344 c->choose_total_tries = ceph_decode_32(p);
345 dout("crush decode tunable choose_local_tries = %d",
346 c->choose_local_tries);
347 dout("crush decode tunable choose_local_fallback_tries = %d",
348 c->choose_local_fallback_tries);
349 dout("crush decode tunable choose_total_tries = %d",
350 c->choose_total_tries);
351
352 ceph_decode_need(p, end, sizeof(u32), done);
353 c->chooseleaf_descend_once = ceph_decode_32(p);
354 dout("crush decode tunable chooseleaf_descend_once = %d",
355 c->chooseleaf_descend_once);
356
357 ceph_decode_need(p, end, sizeof(u8), done);
358 c->chooseleaf_vary_r = ceph_decode_8(p);
359 dout("crush decode tunable chooseleaf_vary_r = %d",
360 c->chooseleaf_vary_r);
361
362 done:
363 dout("crush_decode success\n");
364 return c;
365
366 badmem:
367 err = -ENOMEM;
368 bad:
369 dout("crush_decode fail %d\n", err);
370 crush_destroy(c);
371 return ERR_PTR(err);
372 }
373
374 /*
375 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
376 * to a set of osds) and primary_temp (explicit primary setting)
377 */
378 static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
379 {
380 if (l.pool < r.pool)
381 return -1;
382 if (l.pool > r.pool)
383 return 1;
384 if (l.seed < r.seed)
385 return -1;
386 if (l.seed > r.seed)
387 return 1;
388 return 0;
389 }
390
391 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
392 struct rb_root *root)
393 {
394 struct rb_node **p = &root->rb_node;
395 struct rb_node *parent = NULL;
396 struct ceph_pg_mapping *pg = NULL;
397 int c;
398
399 dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
400 while (*p) {
401 parent = *p;
402 pg = rb_entry(parent, struct ceph_pg_mapping, node);
403 c = pgid_cmp(new->pgid, pg->pgid);
404 if (c < 0)
405 p = &(*p)->rb_left;
406 else if (c > 0)
407 p = &(*p)->rb_right;
408 else
409 return -EEXIST;
410 }
411
412 rb_link_node(&new->node, parent, p);
413 rb_insert_color(&new->node, root);
414 return 0;
415 }
416
417 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
418 struct ceph_pg pgid)
419 {
420 struct rb_node *n = root->rb_node;
421 struct ceph_pg_mapping *pg;
422 int c;
423
424 while (n) {
425 pg = rb_entry(n, struct ceph_pg_mapping, node);
426 c = pgid_cmp(pgid, pg->pgid);
427 if (c < 0) {
428 n = n->rb_left;
429 } else if (c > 0) {
430 n = n->rb_right;
431 } else {
432 dout("__lookup_pg_mapping %lld.%x got %p\n",
433 pgid.pool, pgid.seed, pg);
434 return pg;
435 }
436 }
437 return NULL;
438 }
439
440 static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
441 {
442 struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
443
444 if (pg) {
445 dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
446 pg);
447 rb_erase(&pg->node, root);
448 kfree(pg);
449 return 0;
450 }
451 dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
452 return -ENOENT;
453 }
454
455 /*
456 * rbtree of pg pool info
457 */
458 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
459 {
460 struct rb_node **p = &root->rb_node;
461 struct rb_node *parent = NULL;
462 struct ceph_pg_pool_info *pi = NULL;
463
464 while (*p) {
465 parent = *p;
466 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
467 if (new->id < pi->id)
468 p = &(*p)->rb_left;
469 else if (new->id > pi->id)
470 p = &(*p)->rb_right;
471 else
472 return -EEXIST;
473 }
474
475 rb_link_node(&new->node, parent, p);
476 rb_insert_color(&new->node, root);
477 return 0;
478 }
479
480 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
481 {
482 struct ceph_pg_pool_info *pi;
483 struct rb_node *n = root->rb_node;
484
485 while (n) {
486 pi = rb_entry(n, struct ceph_pg_pool_info, node);
487 if (id < pi->id)
488 n = n->rb_left;
489 else if (id > pi->id)
490 n = n->rb_right;
491 else
492 return pi;
493 }
494 return NULL;
495 }
496
497 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
498 {
499 return __lookup_pg_pool(&map->pg_pools, id);
500 }
501
502 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
503 {
504 struct ceph_pg_pool_info *pi;
505
506 if (id == CEPH_NOPOOL)
507 return NULL;
508
509 if (WARN_ON_ONCE(id > (u64) INT_MAX))
510 return NULL;
511
512 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
513
514 return pi ? pi->name : NULL;
515 }
516 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
517
518 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
519 {
520 struct rb_node *rbp;
521
522 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
523 struct ceph_pg_pool_info *pi =
524 rb_entry(rbp, struct ceph_pg_pool_info, node);
525 if (pi->name && strcmp(pi->name, name) == 0)
526 return pi->id;
527 }
528 return -ENOENT;
529 }
530 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
531
532 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
533 {
534 rb_erase(&pi->node, root);
535 kfree(pi->name);
536 kfree(pi);
537 }
538
539 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
540 {
541 u8 ev, cv;
542 unsigned len, num;
543 void *pool_end;
544
545 ceph_decode_need(p, end, 2 + 4, bad);
546 ev = ceph_decode_8(p); /* encoding version */
547 cv = ceph_decode_8(p); /* compat version */
548 if (ev < 5) {
549 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
550 return -EINVAL;
551 }
552 if (cv > 9) {
553 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
554 return -EINVAL;
555 }
556 len = ceph_decode_32(p);
557 ceph_decode_need(p, end, len, bad);
558 pool_end = *p + len;
559
560 pi->type = ceph_decode_8(p);
561 pi->size = ceph_decode_8(p);
562 pi->crush_ruleset = ceph_decode_8(p);
563 pi->object_hash = ceph_decode_8(p);
564
565 pi->pg_num = ceph_decode_32(p);
566 pi->pgp_num = ceph_decode_32(p);
567
568 *p += 4 + 4; /* skip lpg* */
569 *p += 4; /* skip last_change */
570 *p += 8 + 4; /* skip snap_seq, snap_epoch */
571
572 /* skip snaps */
573 num = ceph_decode_32(p);
574 while (num--) {
575 *p += 8; /* snapid key */
576 *p += 1 + 1; /* versions */
577 len = ceph_decode_32(p);
578 *p += len;
579 }
580
581 /* skip removed_snaps */
582 num = ceph_decode_32(p);
583 *p += num * (8 + 8);
584
585 *p += 8; /* skip auid */
586 pi->flags = ceph_decode_64(p);
587 *p += 4; /* skip crash_replay_interval */
588
589 if (ev >= 7)
590 *p += 1; /* skip min_size */
591
592 if (ev >= 8)
593 *p += 8 + 8; /* skip quota_max_* */
594
595 if (ev >= 9) {
596 /* skip tiers */
597 num = ceph_decode_32(p);
598 *p += num * 8;
599
600 *p += 8; /* skip tier_of */
601 *p += 1; /* skip cache_mode */
602
603 pi->read_tier = ceph_decode_64(p);
604 pi->write_tier = ceph_decode_64(p);
605 } else {
606 pi->read_tier = -1;
607 pi->write_tier = -1;
608 }
609
610 /* ignore the rest */
611
612 *p = pool_end;
613 calc_pg_masks(pi);
614 return 0;
615
616 bad:
617 return -EINVAL;
618 }
619
620 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
621 {
622 struct ceph_pg_pool_info *pi;
623 u32 num, len;
624 u64 pool;
625
626 ceph_decode_32_safe(p, end, num, bad);
627 dout(" %d pool names\n", num);
628 while (num--) {
629 ceph_decode_64_safe(p, end, pool, bad);
630 ceph_decode_32_safe(p, end, len, bad);
631 dout(" pool %llu len %d\n", pool, len);
632 ceph_decode_need(p, end, len, bad);
633 pi = __lookup_pg_pool(&map->pg_pools, pool);
634 if (pi) {
635 char *name = kstrndup(*p, len, GFP_NOFS);
636
637 if (!name)
638 return -ENOMEM;
639 kfree(pi->name);
640 pi->name = name;
641 dout(" name is %s\n", pi->name);
642 }
643 *p += len;
644 }
645 return 0;
646
647 bad:
648 return -EINVAL;
649 }
650
651 /*
652 * osd map
653 */
654 void ceph_osdmap_destroy(struct ceph_osdmap *map)
655 {
656 dout("osdmap_destroy %p\n", map);
657 if (map->crush)
658 crush_destroy(map->crush);
659 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
660 struct ceph_pg_mapping *pg =
661 rb_entry(rb_first(&map->pg_temp),
662 struct ceph_pg_mapping, node);
663 rb_erase(&pg->node, &map->pg_temp);
664 kfree(pg);
665 }
666 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
667 struct ceph_pg_mapping *pg =
668 rb_entry(rb_first(&map->primary_temp),
669 struct ceph_pg_mapping, node);
670 rb_erase(&pg->node, &map->primary_temp);
671 kfree(pg);
672 }
673 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
674 struct ceph_pg_pool_info *pi =
675 rb_entry(rb_first(&map->pg_pools),
676 struct ceph_pg_pool_info, node);
677 __remove_pg_pool(&map->pg_pools, pi);
678 }
679 kfree(map->osd_state);
680 kfree(map->osd_weight);
681 kfree(map->osd_addr);
682 kfree(map->osd_primary_affinity);
683 kfree(map);
684 }
685
686 /*
687 * Adjust max_osd value, (re)allocate arrays.
688 *
689 * The new elements are properly initialized.
690 */
691 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
692 {
693 u8 *state;
694 u32 *weight;
695 struct ceph_entity_addr *addr;
696 int i;
697
698 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
699 if (!state)
700 return -ENOMEM;
701 map->osd_state = state;
702
703 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
704 if (!weight)
705 return -ENOMEM;
706 map->osd_weight = weight;
707
708 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
709 if (!addr)
710 return -ENOMEM;
711 map->osd_addr = addr;
712
713 for (i = map->max_osd; i < max; i++) {
714 map->osd_state[i] = 0;
715 map->osd_weight[i] = CEPH_OSD_OUT;
716 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
717 }
718
719 if (map->osd_primary_affinity) {
720 u32 *affinity;
721
722 affinity = krealloc(map->osd_primary_affinity,
723 max*sizeof(*affinity), GFP_NOFS);
724 if (!affinity)
725 return -ENOMEM;
726 map->osd_primary_affinity = affinity;
727
728 for (i = map->max_osd; i < max; i++)
729 map->osd_primary_affinity[i] =
730 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
731 }
732
733 map->max_osd = max;
734
735 return 0;
736 }
737
738 #define OSDMAP_WRAPPER_COMPAT_VER 7
739 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
740
741 /*
742 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
743 * to struct_v of the client_data section for new (v7 and above)
744 * osdmaps.
745 */
746 static int get_osdmap_client_data_v(void **p, void *end,
747 const char *prefix, u8 *v)
748 {
749 u8 struct_v;
750
751 ceph_decode_8_safe(p, end, struct_v, e_inval);
752 if (struct_v >= 7) {
753 u8 struct_compat;
754
755 ceph_decode_8_safe(p, end, struct_compat, e_inval);
756 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
757 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
758 struct_v, struct_compat,
759 OSDMAP_WRAPPER_COMPAT_VER, prefix);
760 return -EINVAL;
761 }
762 *p += 4; /* ignore wrapper struct_len */
763
764 ceph_decode_8_safe(p, end, struct_v, e_inval);
765 ceph_decode_8_safe(p, end, struct_compat, e_inval);
766 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
767 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
768 struct_v, struct_compat,
769 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
770 return -EINVAL;
771 }
772 *p += 4; /* ignore client data struct_len */
773 } else {
774 u16 version;
775
776 *p -= 1;
777 ceph_decode_16_safe(p, end, version, e_inval);
778 if (version < 6) {
779 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
780 version, prefix);
781 return -EINVAL;
782 }
783
784 /* old osdmap enconding */
785 struct_v = 0;
786 }
787
788 *v = struct_v;
789 return 0;
790
791 e_inval:
792 return -EINVAL;
793 }
794
795 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
796 bool incremental)
797 {
798 u32 n;
799
800 ceph_decode_32_safe(p, end, n, e_inval);
801 while (n--) {
802 struct ceph_pg_pool_info *pi;
803 u64 pool;
804 int ret;
805
806 ceph_decode_64_safe(p, end, pool, e_inval);
807
808 pi = __lookup_pg_pool(&map->pg_pools, pool);
809 if (!incremental || !pi) {
810 pi = kzalloc(sizeof(*pi), GFP_NOFS);
811 if (!pi)
812 return -ENOMEM;
813
814 pi->id = pool;
815
816 ret = __insert_pg_pool(&map->pg_pools, pi);
817 if (ret) {
818 kfree(pi);
819 return ret;
820 }
821 }
822
823 ret = decode_pool(p, end, pi);
824 if (ret)
825 return ret;
826 }
827
828 return 0;
829
830 e_inval:
831 return -EINVAL;
832 }
833
834 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
835 {
836 return __decode_pools(p, end, map, false);
837 }
838
839 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
840 {
841 return __decode_pools(p, end, map, true);
842 }
843
844 static int __decode_pg_temp(void **p, void *end, struct ceph_osdmap *map,
845 bool incremental)
846 {
847 u32 n;
848
849 ceph_decode_32_safe(p, end, n, e_inval);
850 while (n--) {
851 struct ceph_pg pgid;
852 u32 len, i;
853 int ret;
854
855 ret = ceph_decode_pgid(p, end, &pgid);
856 if (ret)
857 return ret;
858
859 ceph_decode_32_safe(p, end, len, e_inval);
860
861 ret = __remove_pg_mapping(&map->pg_temp, pgid);
862 BUG_ON(!incremental && ret != -ENOENT);
863
864 if (!incremental || len > 0) {
865 struct ceph_pg_mapping *pg;
866
867 ceph_decode_need(p, end, len*sizeof(u32), e_inval);
868
869 if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
870 return -EINVAL;
871
872 pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
873 if (!pg)
874 return -ENOMEM;
875
876 pg->pgid = pgid;
877 pg->pg_temp.len = len;
878 for (i = 0; i < len; i++)
879 pg->pg_temp.osds[i] = ceph_decode_32(p);
880
881 ret = __insert_pg_mapping(pg, &map->pg_temp);
882 if (ret) {
883 kfree(pg);
884 return ret;
885 }
886 }
887 }
888
889 return 0;
890
891 e_inval:
892 return -EINVAL;
893 }
894
895 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
896 {
897 return __decode_pg_temp(p, end, map, false);
898 }
899
900 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
901 {
902 return __decode_pg_temp(p, end, map, true);
903 }
904
905 static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
906 bool incremental)
907 {
908 u32 n;
909
910 ceph_decode_32_safe(p, end, n, e_inval);
911 while (n--) {
912 struct ceph_pg pgid;
913 u32 osd;
914 int ret;
915
916 ret = ceph_decode_pgid(p, end, &pgid);
917 if (ret)
918 return ret;
919
920 ceph_decode_32_safe(p, end, osd, e_inval);
921
922 ret = __remove_pg_mapping(&map->primary_temp, pgid);
923 BUG_ON(!incremental && ret != -ENOENT);
924
925 if (!incremental || osd != (u32)-1) {
926 struct ceph_pg_mapping *pg;
927
928 pg = kzalloc(sizeof(*pg), GFP_NOFS);
929 if (!pg)
930 return -ENOMEM;
931
932 pg->pgid = pgid;
933 pg->primary_temp.osd = osd;
934
935 ret = __insert_pg_mapping(pg, &map->primary_temp);
936 if (ret) {
937 kfree(pg);
938 return ret;
939 }
940 }
941 }
942
943 return 0;
944
945 e_inval:
946 return -EINVAL;
947 }
948
949 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
950 {
951 return __decode_primary_temp(p, end, map, false);
952 }
953
954 static int decode_new_primary_temp(void **p, void *end,
955 struct ceph_osdmap *map)
956 {
957 return __decode_primary_temp(p, end, map, true);
958 }
959
960 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
961 {
962 BUG_ON(osd >= map->max_osd);
963
964 if (!map->osd_primary_affinity)
965 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
966
967 return map->osd_primary_affinity[osd];
968 }
969
970 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
971 {
972 BUG_ON(osd >= map->max_osd);
973
974 if (!map->osd_primary_affinity) {
975 int i;
976
977 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
978 GFP_NOFS);
979 if (!map->osd_primary_affinity)
980 return -ENOMEM;
981
982 for (i = 0; i < map->max_osd; i++)
983 map->osd_primary_affinity[i] =
984 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
985 }
986
987 map->osd_primary_affinity[osd] = aff;
988
989 return 0;
990 }
991
992 static int decode_primary_affinity(void **p, void *end,
993 struct ceph_osdmap *map)
994 {
995 u32 len, i;
996
997 ceph_decode_32_safe(p, end, len, e_inval);
998 if (len == 0) {
999 kfree(map->osd_primary_affinity);
1000 map->osd_primary_affinity = NULL;
1001 return 0;
1002 }
1003 if (len != map->max_osd)
1004 goto e_inval;
1005
1006 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1007
1008 for (i = 0; i < map->max_osd; i++) {
1009 int ret;
1010
1011 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1012 if (ret)
1013 return ret;
1014 }
1015
1016 return 0;
1017
1018 e_inval:
1019 return -EINVAL;
1020 }
1021
1022 static int decode_new_primary_affinity(void **p, void *end,
1023 struct ceph_osdmap *map)
1024 {
1025 u32 n;
1026
1027 ceph_decode_32_safe(p, end, n, e_inval);
1028 while (n--) {
1029 u32 osd, aff;
1030 int ret;
1031
1032 ceph_decode_32_safe(p, end, osd, e_inval);
1033 ceph_decode_32_safe(p, end, aff, e_inval);
1034
1035 ret = set_primary_affinity(map, osd, aff);
1036 if (ret)
1037 return ret;
1038
1039 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1040 }
1041
1042 return 0;
1043
1044 e_inval:
1045 return -EINVAL;
1046 }
1047
1048 /*
1049 * decode a full map.
1050 */
1051 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1052 {
1053 u8 struct_v;
1054 u32 epoch = 0;
1055 void *start = *p;
1056 u32 max;
1057 u32 len, i;
1058 int err;
1059
1060 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1061
1062 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1063 if (err)
1064 goto bad;
1065
1066 /* fsid, epoch, created, modified */
1067 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1068 sizeof(map->created) + sizeof(map->modified), e_inval);
1069 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1070 epoch = map->epoch = ceph_decode_32(p);
1071 ceph_decode_copy(p, &map->created, sizeof(map->created));
1072 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1073
1074 /* pools */
1075 err = decode_pools(p, end, map);
1076 if (err)
1077 goto bad;
1078
1079 /* pool_name */
1080 err = decode_pool_names(p, end, map);
1081 if (err)
1082 goto bad;
1083
1084 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1085
1086 ceph_decode_32_safe(p, end, map->flags, e_inval);
1087
1088 /* max_osd */
1089 ceph_decode_32_safe(p, end, max, e_inval);
1090
1091 /* (re)alloc osd arrays */
1092 err = osdmap_set_max_osd(map, max);
1093 if (err)
1094 goto bad;
1095
1096 /* osd_state, osd_weight, osd_addrs->client_addr */
1097 ceph_decode_need(p, end, 3*sizeof(u32) +
1098 map->max_osd*(1 + sizeof(*map->osd_weight) +
1099 sizeof(*map->osd_addr)), e_inval);
1100
1101 if (ceph_decode_32(p) != map->max_osd)
1102 goto e_inval;
1103
1104 ceph_decode_copy(p, map->osd_state, map->max_osd);
1105
1106 if (ceph_decode_32(p) != map->max_osd)
1107 goto e_inval;
1108
1109 for (i = 0; i < map->max_osd; i++)
1110 map->osd_weight[i] = ceph_decode_32(p);
1111
1112 if (ceph_decode_32(p) != map->max_osd)
1113 goto e_inval;
1114
1115 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1116 for (i = 0; i < map->max_osd; i++)
1117 ceph_decode_addr(&map->osd_addr[i]);
1118
1119 /* pg_temp */
1120 err = decode_pg_temp(p, end, map);
1121 if (err)
1122 goto bad;
1123
1124 /* primary_temp */
1125 if (struct_v >= 1) {
1126 err = decode_primary_temp(p, end, map);
1127 if (err)
1128 goto bad;
1129 }
1130
1131 /* primary_affinity */
1132 if (struct_v >= 2) {
1133 err = decode_primary_affinity(p, end, map);
1134 if (err)
1135 goto bad;
1136 } else {
1137 /* XXX can this happen? */
1138 kfree(map->osd_primary_affinity);
1139 map->osd_primary_affinity = NULL;
1140 }
1141
1142 /* crush */
1143 ceph_decode_32_safe(p, end, len, e_inval);
1144 map->crush = crush_decode(*p, min(*p + len, end));
1145 if (IS_ERR(map->crush)) {
1146 err = PTR_ERR(map->crush);
1147 map->crush = NULL;
1148 goto bad;
1149 }
1150 *p += len;
1151
1152 /* ignore the rest */
1153 *p = end;
1154
1155 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1156 return 0;
1157
1158 e_inval:
1159 err = -EINVAL;
1160 bad:
1161 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1162 err, epoch, (int)(*p - start), *p, start, end);
1163 print_hex_dump(KERN_DEBUG, "osdmap: ",
1164 DUMP_PREFIX_OFFSET, 16, 1,
1165 start, end - start, true);
1166 return err;
1167 }
1168
1169 /*
1170 * Allocate and decode a full map.
1171 */
1172 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1173 {
1174 struct ceph_osdmap *map;
1175 int ret;
1176
1177 map = kzalloc(sizeof(*map), GFP_NOFS);
1178 if (!map)
1179 return ERR_PTR(-ENOMEM);
1180
1181 map->pg_temp = RB_ROOT;
1182 map->primary_temp = RB_ROOT;
1183 mutex_init(&map->crush_scratch_mutex);
1184
1185 ret = osdmap_decode(p, end, map);
1186 if (ret) {
1187 ceph_osdmap_destroy(map);
1188 return ERR_PTR(ret);
1189 }
1190
1191 return map;
1192 }
1193
1194 /*
1195 * Encoding order is (new_up_client, new_state, new_weight). Need to
1196 * apply in the (new_weight, new_state, new_up_client) order, because
1197 * an incremental map may look like e.g.
1198 *
1199 * new_up_client: { osd=6, addr=... } # set osd_state and addr
1200 * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
1201 */
1202 static int decode_new_up_state_weight(void **p, void *end,
1203 struct ceph_osdmap *map)
1204 {
1205 void *new_up_client;
1206 void *new_state;
1207 void *new_weight_end;
1208 u32 len;
1209
1210 new_up_client = *p;
1211 ceph_decode_32_safe(p, end, len, e_inval);
1212 len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
1213 ceph_decode_need(p, end, len, e_inval);
1214 *p += len;
1215
1216 new_state = *p;
1217 ceph_decode_32_safe(p, end, len, e_inval);
1218 len *= sizeof(u32) + sizeof(u8);
1219 ceph_decode_need(p, end, len, e_inval);
1220 *p += len;
1221
1222 /* new_weight */
1223 ceph_decode_32_safe(p, end, len, e_inval);
1224 while (len--) {
1225 s32 osd;
1226 u32 w;
1227
1228 ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
1229 osd = ceph_decode_32(p);
1230 w = ceph_decode_32(p);
1231 BUG_ON(osd >= map->max_osd);
1232 pr_info("osd%d weight 0x%x %s\n", osd, w,
1233 w == CEPH_OSD_IN ? "(in)" :
1234 (w == CEPH_OSD_OUT ? "(out)" : ""));
1235 map->osd_weight[osd] = w;
1236
1237 /*
1238 * If we are marking in, set the EXISTS, and clear the
1239 * AUTOOUT and NEW bits.
1240 */
1241 if (w) {
1242 map->osd_state[osd] |= CEPH_OSD_EXISTS;
1243 map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
1244 CEPH_OSD_NEW);
1245 }
1246 }
1247 new_weight_end = *p;
1248
1249 /* new_state (up/down) */
1250 *p = new_state;
1251 len = ceph_decode_32(p);
1252 while (len--) {
1253 s32 osd;
1254 u8 xorstate;
1255 int ret;
1256
1257 osd = ceph_decode_32(p);
1258 xorstate = ceph_decode_8(p);
1259 if (xorstate == 0)
1260 xorstate = CEPH_OSD_UP;
1261 BUG_ON(osd >= map->max_osd);
1262 if ((map->osd_state[osd] & CEPH_OSD_UP) &&
1263 (xorstate & CEPH_OSD_UP))
1264 pr_info("osd%d down\n", osd);
1265 if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
1266 (xorstate & CEPH_OSD_EXISTS)) {
1267 pr_info("osd%d does not exist\n", osd);
1268 ret = set_primary_affinity(map, osd,
1269 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
1270 if (ret)
1271 return ret;
1272 memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
1273 map->osd_state[osd] = 0;
1274 } else {
1275 map->osd_state[osd] ^= xorstate;
1276 }
1277 }
1278
1279 /* new_up_client */
1280 *p = new_up_client;
1281 len = ceph_decode_32(p);
1282 while (len--) {
1283 s32 osd;
1284 struct ceph_entity_addr addr;
1285
1286 osd = ceph_decode_32(p);
1287 ceph_decode_copy(p, &addr, sizeof(addr));
1288 ceph_decode_addr(&addr);
1289 BUG_ON(osd >= map->max_osd);
1290 pr_info("osd%d up\n", osd);
1291 map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
1292 map->osd_addr[osd] = addr;
1293 }
1294
1295 *p = new_weight_end;
1296 return 0;
1297
1298 e_inval:
1299 return -EINVAL;
1300 }
1301
1302 /*
1303 * decode and apply an incremental map update.
1304 */
1305 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1306 struct ceph_osdmap *map,
1307 struct ceph_messenger *msgr)
1308 {
1309 struct crush_map *newcrush = NULL;
1310 struct ceph_fsid fsid;
1311 u32 epoch = 0;
1312 struct ceph_timespec modified;
1313 s32 len;
1314 u64 pool;
1315 __s64 new_pool_max;
1316 __s32 new_flags, max;
1317 void *start = *p;
1318 int err;
1319 u8 struct_v;
1320
1321 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1322
1323 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1324 if (err)
1325 goto bad;
1326
1327 /* fsid, epoch, modified, new_pool_max, new_flags */
1328 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1329 sizeof(u64) + sizeof(u32), e_inval);
1330 ceph_decode_copy(p, &fsid, sizeof(fsid));
1331 epoch = ceph_decode_32(p);
1332 BUG_ON(epoch != map->epoch+1);
1333 ceph_decode_copy(p, &modified, sizeof(modified));
1334 new_pool_max = ceph_decode_64(p);
1335 new_flags = ceph_decode_32(p);
1336
1337 /* full map? */
1338 ceph_decode_32_safe(p, end, len, e_inval);
1339 if (len > 0) {
1340 dout("apply_incremental full map len %d, %p to %p\n",
1341 len, *p, end);
1342 return ceph_osdmap_decode(p, min(*p+len, end));
1343 }
1344
1345 /* new crush? */
1346 ceph_decode_32_safe(p, end, len, e_inval);
1347 if (len > 0) {
1348 newcrush = crush_decode(*p, min(*p+len, end));
1349 if (IS_ERR(newcrush)) {
1350 err = PTR_ERR(newcrush);
1351 newcrush = NULL;
1352 goto bad;
1353 }
1354 *p += len;
1355 }
1356
1357 /* new flags? */
1358 if (new_flags >= 0)
1359 map->flags = new_flags;
1360 if (new_pool_max >= 0)
1361 map->pool_max = new_pool_max;
1362
1363 /* new max? */
1364 ceph_decode_32_safe(p, end, max, e_inval);
1365 if (max >= 0) {
1366 err = osdmap_set_max_osd(map, max);
1367 if (err)
1368 goto bad;
1369 }
1370
1371 map->epoch++;
1372 map->modified = modified;
1373 if (newcrush) {
1374 if (map->crush)
1375 crush_destroy(map->crush);
1376 map->crush = newcrush;
1377 newcrush = NULL;
1378 }
1379
1380 /* new_pools */
1381 err = decode_new_pools(p, end, map);
1382 if (err)
1383 goto bad;
1384
1385 /* new_pool_names */
1386 err = decode_pool_names(p, end, map);
1387 if (err)
1388 goto bad;
1389
1390 /* old_pool */
1391 ceph_decode_32_safe(p, end, len, e_inval);
1392 while (len--) {
1393 struct ceph_pg_pool_info *pi;
1394
1395 ceph_decode_64_safe(p, end, pool, e_inval);
1396 pi = __lookup_pg_pool(&map->pg_pools, pool);
1397 if (pi)
1398 __remove_pg_pool(&map->pg_pools, pi);
1399 }
1400
1401 /* new_up_client, new_state, new_weight */
1402 err = decode_new_up_state_weight(p, end, map);
1403 if (err)
1404 goto bad;
1405
1406 /* new_pg_temp */
1407 err = decode_new_pg_temp(p, end, map);
1408 if (err)
1409 goto bad;
1410
1411 /* new_primary_temp */
1412 if (struct_v >= 1) {
1413 err = decode_new_primary_temp(p, end, map);
1414 if (err)
1415 goto bad;
1416 }
1417
1418 /* new_primary_affinity */
1419 if (struct_v >= 2) {
1420 err = decode_new_primary_affinity(p, end, map);
1421 if (err)
1422 goto bad;
1423 }
1424
1425 /* ignore the rest */
1426 *p = end;
1427
1428 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1429 return map;
1430
1431 e_inval:
1432 err = -EINVAL;
1433 bad:
1434 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1435 err, epoch, (int)(*p - start), *p, start, end);
1436 print_hex_dump(KERN_DEBUG, "osdmap: ",
1437 DUMP_PREFIX_OFFSET, 16, 1,
1438 start, end - start, true);
1439 if (newcrush)
1440 crush_destroy(newcrush);
1441 return ERR_PTR(err);
1442 }
1443
1444
1445
1446
1447 /*
1448 * calculate file layout from given offset, length.
1449 * fill in correct oid, logical length, and object extent
1450 * offset, length.
1451 *
1452 * for now, we write only a single su, until we can
1453 * pass a stride back to the caller.
1454 */
1455 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
1456 u64 off, u64 len,
1457 u64 *ono,
1458 u64 *oxoff, u64 *oxlen)
1459 {
1460 u32 osize = le32_to_cpu(layout->fl_object_size);
1461 u32 su = le32_to_cpu(layout->fl_stripe_unit);
1462 u32 sc = le32_to_cpu(layout->fl_stripe_count);
1463 u32 bl, stripeno, stripepos, objsetno;
1464 u32 su_per_object;
1465 u64 t, su_offset;
1466
1467 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
1468 osize, su);
1469 if (su == 0 || sc == 0)
1470 goto invalid;
1471 su_per_object = osize / su;
1472 if (su_per_object == 0)
1473 goto invalid;
1474 dout("osize %u / su %u = su_per_object %u\n", osize, su,
1475 su_per_object);
1476
1477 if ((su & ~PAGE_MASK) != 0)
1478 goto invalid;
1479
1480 /* bl = *off / su; */
1481 t = off;
1482 do_div(t, su);
1483 bl = t;
1484 dout("off %llu / su %u = bl %u\n", off, su, bl);
1485
1486 stripeno = bl / sc;
1487 stripepos = bl % sc;
1488 objsetno = stripeno / su_per_object;
1489
1490 *ono = objsetno * sc + stripepos;
1491 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
1492
1493 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
1494 t = off;
1495 su_offset = do_div(t, su);
1496 *oxoff = su_offset + (stripeno % su_per_object) * su;
1497
1498 /*
1499 * Calculate the length of the extent being written to the selected
1500 * object. This is the minimum of the full length requested (len) or
1501 * the remainder of the current stripe being written to.
1502 */
1503 *oxlen = min_t(u64, len, su - su_offset);
1504
1505 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
1506 return 0;
1507
1508 invalid:
1509 dout(" invalid layout\n");
1510 *ono = 0;
1511 *oxoff = 0;
1512 *oxlen = 0;
1513 return -EINVAL;
1514 }
1515 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
1516
1517 /*
1518 * Calculate mapping of a (oloc, oid) pair to a PG. Should only be
1519 * called with target's (oloc, oid), since tiering isn't taken into
1520 * account.
1521 */
1522 int ceph_oloc_oid_to_pg(struct ceph_osdmap *osdmap,
1523 struct ceph_object_locator *oloc,
1524 struct ceph_object_id *oid,
1525 struct ceph_pg *pg_out)
1526 {
1527 struct ceph_pg_pool_info *pi;
1528
1529 pi = __lookup_pg_pool(&osdmap->pg_pools, oloc->pool);
1530 if (!pi)
1531 return -EIO;
1532
1533 pg_out->pool = oloc->pool;
1534 pg_out->seed = ceph_str_hash(pi->object_hash, oid->name,
1535 oid->name_len);
1536
1537 dout("%s '%.*s' pgid %llu.%x\n", __func__, oid->name_len, oid->name,
1538 pg_out->pool, pg_out->seed);
1539 return 0;
1540 }
1541 EXPORT_SYMBOL(ceph_oloc_oid_to_pg);
1542
1543 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
1544 int *result, int result_max,
1545 const __u32 *weight, int weight_max)
1546 {
1547 int r;
1548
1549 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
1550
1551 mutex_lock(&map->crush_scratch_mutex);
1552 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
1553 weight, weight_max, map->crush_scratch_ary);
1554 mutex_unlock(&map->crush_scratch_mutex);
1555
1556 return r;
1557 }
1558
1559 /*
1560 * Calculate raw (crush) set for given pgid.
1561 *
1562 * Return raw set length, or error.
1563 */
1564 static int pg_to_raw_osds(struct ceph_osdmap *osdmap,
1565 struct ceph_pg_pool_info *pool,
1566 struct ceph_pg pgid, u32 pps, int *osds)
1567 {
1568 int ruleno;
1569 int len;
1570
1571 /* crush */
1572 ruleno = crush_find_rule(osdmap->crush, pool->crush_ruleset,
1573 pool->type, pool->size);
1574 if (ruleno < 0) {
1575 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
1576 pgid.pool, pool->crush_ruleset, pool->type,
1577 pool->size);
1578 return -ENOENT;
1579 }
1580
1581 len = do_crush(osdmap, ruleno, pps, osds,
1582 min_t(int, pool->size, CEPH_PG_MAX_SIZE),
1583 osdmap->osd_weight, osdmap->max_osd);
1584 if (len < 0) {
1585 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
1586 len, ruleno, pgid.pool, pool->crush_ruleset,
1587 pool->type, pool->size);
1588 return len;
1589 }
1590
1591 return len;
1592 }
1593
1594 /*
1595 * Given raw set, calculate up set and up primary.
1596 *
1597 * Return up set length. *primary is set to up primary osd id, or -1
1598 * if up set is empty.
1599 */
1600 static int raw_to_up_osds(struct ceph_osdmap *osdmap,
1601 struct ceph_pg_pool_info *pool,
1602 int *osds, int len, int *primary)
1603 {
1604 int up_primary = -1;
1605 int i;
1606
1607 if (ceph_can_shift_osds(pool)) {
1608 int removed = 0;
1609
1610 for (i = 0; i < len; i++) {
1611 if (ceph_osd_is_down(osdmap, osds[i])) {
1612 removed++;
1613 continue;
1614 }
1615 if (removed)
1616 osds[i - removed] = osds[i];
1617 }
1618
1619 len -= removed;
1620 if (len > 0)
1621 up_primary = osds[0];
1622 } else {
1623 for (i = len - 1; i >= 0; i--) {
1624 if (ceph_osd_is_down(osdmap, osds[i]))
1625 osds[i] = CRUSH_ITEM_NONE;
1626 else
1627 up_primary = osds[i];
1628 }
1629 }
1630
1631 *primary = up_primary;
1632 return len;
1633 }
1634
1635 static void apply_primary_affinity(struct ceph_osdmap *osdmap, u32 pps,
1636 struct ceph_pg_pool_info *pool,
1637 int *osds, int len, int *primary)
1638 {
1639 int i;
1640 int pos = -1;
1641
1642 /*
1643 * Do we have any non-default primary_affinity values for these
1644 * osds?
1645 */
1646 if (!osdmap->osd_primary_affinity)
1647 return;
1648
1649 for (i = 0; i < len; i++) {
1650 int osd = osds[i];
1651
1652 if (osd != CRUSH_ITEM_NONE &&
1653 osdmap->osd_primary_affinity[osd] !=
1654 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
1655 break;
1656 }
1657 }
1658 if (i == len)
1659 return;
1660
1661 /*
1662 * Pick the primary. Feed both the seed (for the pg) and the
1663 * osd into the hash/rng so that a proportional fraction of an
1664 * osd's pgs get rejected as primary.
1665 */
1666 for (i = 0; i < len; i++) {
1667 int osd = osds[i];
1668 u32 aff;
1669
1670 if (osd == CRUSH_ITEM_NONE)
1671 continue;
1672
1673 aff = osdmap->osd_primary_affinity[osd];
1674 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
1675 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
1676 pps, osd) >> 16) >= aff) {
1677 /*
1678 * We chose not to use this primary. Note it
1679 * anyway as a fallback in case we don't pick
1680 * anyone else, but keep looking.
1681 */
1682 if (pos < 0)
1683 pos = i;
1684 } else {
1685 pos = i;
1686 break;
1687 }
1688 }
1689 if (pos < 0)
1690 return;
1691
1692 *primary = osds[pos];
1693
1694 if (ceph_can_shift_osds(pool) && pos > 0) {
1695 /* move the new primary to the front */
1696 for (i = pos; i > 0; i--)
1697 osds[i] = osds[i - 1];
1698 osds[0] = *primary;
1699 }
1700 }
1701
1702 /*
1703 * Given up set, apply pg_temp and primary_temp mappings.
1704 *
1705 * Return acting set length. *primary is set to acting primary osd id,
1706 * or -1 if acting set is empty.
1707 */
1708 static int apply_temps(struct ceph_osdmap *osdmap,
1709 struct ceph_pg_pool_info *pool, struct ceph_pg pgid,
1710 int *osds, int len, int *primary)
1711 {
1712 struct ceph_pg_mapping *pg;
1713 int temp_len;
1714 int temp_primary;
1715 int i;
1716
1717 /* raw_pg -> pg */
1718 pgid.seed = ceph_stable_mod(pgid.seed, pool->pg_num,
1719 pool->pg_num_mask);
1720
1721 /* pg_temp? */
1722 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1723 if (pg) {
1724 temp_len = 0;
1725 temp_primary = -1;
1726
1727 for (i = 0; i < pg->pg_temp.len; i++) {
1728 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
1729 if (ceph_can_shift_osds(pool))
1730 continue;
1731 else
1732 osds[temp_len++] = CRUSH_ITEM_NONE;
1733 } else {
1734 osds[temp_len++] = pg->pg_temp.osds[i];
1735 }
1736 }
1737
1738 /* apply pg_temp's primary */
1739 for (i = 0; i < temp_len; i++) {
1740 if (osds[i] != CRUSH_ITEM_NONE) {
1741 temp_primary = osds[i];
1742 break;
1743 }
1744 }
1745 } else {
1746 temp_len = len;
1747 temp_primary = *primary;
1748 }
1749
1750 /* primary_temp? */
1751 pg = __lookup_pg_mapping(&osdmap->primary_temp, pgid);
1752 if (pg)
1753 temp_primary = pg->primary_temp.osd;
1754
1755 *primary = temp_primary;
1756 return temp_len;
1757 }
1758
1759 /*
1760 * Calculate acting set for given pgid.
1761 *
1762 * Return acting set length, or error. *primary is set to acting
1763 * primary osd id, or -1 if acting set is empty or on error.
1764 */
1765 int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1766 int *osds, int *primary)
1767 {
1768 struct ceph_pg_pool_info *pool;
1769 u32 pps;
1770 int len;
1771
1772 pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool);
1773 if (!pool) {
1774 *primary = -1;
1775 return -ENOENT;
1776 }
1777
1778 if (pool->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
1779 /* hash pool id and seed so that pool PGs do not overlap */
1780 pps = crush_hash32_2(CRUSH_HASH_RJENKINS1,
1781 ceph_stable_mod(pgid.seed, pool->pgp_num,
1782 pool->pgp_num_mask),
1783 pgid.pool);
1784 } else {
1785 /*
1786 * legacy behavior: add ps and pool together. this is
1787 * not a great approach because the PGs from each pool
1788 * will overlap on top of each other: 0.5 == 1.4 ==
1789 * 2.3 == ...
1790 */
1791 pps = ceph_stable_mod(pgid.seed, pool->pgp_num,
1792 pool->pgp_num_mask) +
1793 (unsigned)pgid.pool;
1794 }
1795
1796 len = pg_to_raw_osds(osdmap, pool, pgid, pps, osds);
1797 if (len < 0) {
1798 *primary = -1;
1799 return len;
1800 }
1801
1802 len = raw_to_up_osds(osdmap, pool, osds, len, primary);
1803
1804 apply_primary_affinity(osdmap, pps, pool, osds, len, primary);
1805
1806 len = apply_temps(osdmap, pool, pgid, osds, len, primary);
1807
1808 return len;
1809 }
1810
1811 /*
1812 * Return primary osd for given pgid, or -1 if none.
1813 */
1814 int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1815 {
1816 int osds[CEPH_PG_MAX_SIZE];
1817 int primary;
1818
1819 ceph_calc_pg_acting(osdmap, pgid, osds, &primary);
1820
1821 return primary;
1822 }
1823 EXPORT_SYMBOL(ceph_calc_pg_primary);