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Merge tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-artful-kernel.git] / net / ceph / osdmap.c
CommitLineData
f24e9980 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
5a0e3ad6 3
3d14c5d2 4#include <linux/module.h>
5a0e3ad6 5#include <linux/slab.h>
f24e9980
SW		 6#include <asm/div64.h>
7
3d14c5d2
YS		 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>
f24e9980 13
0bb05da2 14char *ceph_osdmap_state_str(char *str, int len, u32 state)
f24e9980 15{
f24e9980 16 if (!len)
1ec3911d 17 return str;
f24e9980 18
1ec3911d
CD		 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
f24e9980 26 snprintf(str, len, "doesn't exist");
1ec3911d 27
f24e9980
SW		 28 return str;
29}
30
31/* maps */
32
95c96174 33static int calc_bits_of(unsigned int t)
f24e9980
SW		 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 */
46static void calc_pg_masks(struct ceph_pg_pool_info *pi)
47{
4f6a7e5e
SW		 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;
f24e9980
SW		 50}
51
52/*
53 * decode crush map
54 */
55static 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);
c89136ea 60 b->item_weight = ceph_decode_32(p);
f24e9980
SW		 61 return 0;
62bad:
63 return -EINVAL;
64}
65
66static 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++) {
c89136ea
SW		 79 b->item_weights[j] = ceph_decode_32(p);
80 b->sum_weights[j] = ceph_decode_32(p);
f24e9980
SW		 81 }
82 return 0;
83bad:
84 return -EINVAL;
85}
86
87static 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);
82cd003a 92 ceph_decode_8_safe(p, end, b->num_nodes, bad);
f24e9980
SW		 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++)
c89136ea 98 b->node_weights[j] = ceph_decode_32(p);
f24e9980
SW		 99 return 0;
100bad:
101 return -EINVAL;
102}
103
104static 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++) {
c89136ea
SW		 117 b->item_weights[j] = ceph_decode_32(p);
118 b->straws[j] = ceph_decode_32(p);
f24e9980
SW		 119 }
120 return 0;
121bad:
122 return -EINVAL;
123}
124
958a2765
ID		 125static 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;
137bad:
138 return -EINVAL;
139}
140
5cf9c4a9
ID		 141static struct crush_choose_arg_map *alloc_choose_arg_map(void)
142{
143 struct crush_choose_arg_map *arg_map;
144
145 arg_map = kzalloc(sizeof(*arg_map), GFP_NOIO);
146 if (!arg_map)
147 return NULL;
148
149 RB_CLEAR_NODE(&arg_map->node);
150 return arg_map;
151}
152
153static void free_choose_arg_map(struct crush_choose_arg_map *arg_map)
154{
155 if (arg_map) {
156 int i, j;
157
158 WARN_ON(!RB_EMPTY_NODE(&arg_map->node));
159
160 for (i = 0; i < arg_map->size; i++) {
161 struct crush_choose_arg *arg = &arg_map->args[i];
162
163 for (j = 0; j < arg->weight_set_size; j++)
164 kfree(arg->weight_set[j].weights);
165 kfree(arg->weight_set);
166 kfree(arg->ids);
167 }
168 kfree(arg_map->args);
169 kfree(arg_map);
170 }
171}
172
173DEFINE_RB_FUNCS(choose_arg_map, struct crush_choose_arg_map, choose_args_index,
174 node);
175
176void clear_choose_args(struct crush_map *c)
177{
178 while (!RB_EMPTY_ROOT(&c->choose_args)) {
179 struct crush_choose_arg_map *arg_map =
180 rb_entry(rb_first(&c->choose_args),
181 struct crush_choose_arg_map, node);
182
183 erase_choose_arg_map(&c->choose_args, arg_map);
184 free_choose_arg_map(arg_map);
185 }
186}
187
188static u32 *decode_array_32_alloc(void **p, void *end, u32 *plen)
189{
190 u32 *a = NULL;
191 u32 len;
192 int ret;
193
194 ceph_decode_32_safe(p, end, len, e_inval);
195 if (len) {
196 u32 i;
197
198 a = kmalloc_array(len, sizeof(u32), GFP_NOIO);
199 if (!a) {
200 ret = -ENOMEM;
201 goto fail;
202 }
203
204 ceph_decode_need(p, end, len * sizeof(u32), e_inval);
205 for (i = 0; i < len; i++)
206 a[i] = ceph_decode_32(p);
207 }
208
209 *plen = len;
210 return a;
211
212e_inval:
213 ret = -EINVAL;
214fail:
215 kfree(a);
216 return ERR_PTR(ret);
217}
218
219/*
220 * Assumes @arg is zero-initialized.
221 */
222static int decode_choose_arg(void **p, void *end, struct crush_choose_arg *arg)
223{
224 int ret;
225
226 ceph_decode_32_safe(p, end, arg->weight_set_size, e_inval);
227 if (arg->weight_set_size) {
228 u32 i;
229
230 arg->weight_set = kmalloc_array(arg->weight_set_size,
231 sizeof(*arg->weight_set),
232 GFP_NOIO);
233 if (!arg->weight_set)
234 return -ENOMEM;
235
236 for (i = 0; i < arg->weight_set_size; i++) {
237 struct crush_weight_set *w = &arg->weight_set[i];
238
239 w->weights = decode_array_32_alloc(p, end, &w->size);
240 if (IS_ERR(w->weights)) {
241 ret = PTR_ERR(w->weights);
242 w->weights = NULL;
243 return ret;
244 }
245 }
246 }
247
248 arg->ids = decode_array_32_alloc(p, end, &arg->ids_size);
249 if (IS_ERR(arg->ids)) {
250 ret = PTR_ERR(arg->ids);
251 arg->ids = NULL;
252 return ret;
253 }
254
255 return 0;
256
257e_inval:
258 return -EINVAL;
259}
260
261static int decode_choose_args(void **p, void *end, struct crush_map *c)
262{
263 struct crush_choose_arg_map *arg_map = NULL;
264 u32 num_choose_arg_maps, num_buckets;
265 int ret;
266
267 ceph_decode_32_safe(p, end, num_choose_arg_maps, e_inval);
268 while (num_choose_arg_maps--) {
269 arg_map = alloc_choose_arg_map();
270 if (!arg_map) {
271 ret = -ENOMEM;
272 goto fail;
273 }
274
275 ceph_decode_64_safe(p, end, arg_map->choose_args_index,
276 e_inval);
277 arg_map->size = c->max_buckets;
278 arg_map->args = kcalloc(arg_map->size, sizeof(*arg_map->args),
279 GFP_NOIO);
280 if (!arg_map->args) {
281 ret = -ENOMEM;
282 goto fail;
283 }
284
285 ceph_decode_32_safe(p, end, num_buckets, e_inval);
286 while (num_buckets--) {
287 struct crush_choose_arg *arg;
288 u32 bucket_index;
289
290 ceph_decode_32_safe(p, end, bucket_index, e_inval);
291 if (bucket_index >= arg_map->size)
292 goto e_inval;
293
294 arg = &arg_map->args[bucket_index];
295 ret = decode_choose_arg(p, end, arg);
296 if (ret)
297 goto fail;
c7ed1a4b
ID		 298
299 if (arg->ids_size &&
300 arg->ids_size != c->buckets[bucket_index]->size)
301 goto e_inval;
5cf9c4a9
ID		 302 }
303
304 insert_choose_arg_map(&c->choose_args, arg_map);
305 }
306
307 return 0;
308
309e_inval:
310 ret = -EINVAL;
311fail:
312 free_choose_arg_map(arg_map);
313 return ret;
314}
315
66a0e2d5
ID		 316static void crush_finalize(struct crush_map *c)
317{
318 __s32 b;
319
320 /* Space for the array of pointers to per-bucket workspace */
321 c->working_size = sizeof(struct crush_work) +
322 c->max_buckets * sizeof(struct crush_work_bucket *);
323
324 for (b = 0; b < c->max_buckets; b++) {
325 if (!c->buckets[b])
326 continue;
327
328 switch (c->buckets[b]->alg) {
329 default:
330 /*
331 * The base case, permutation variables and
332 * the pointer to the permutation array.
333 */
334 c->working_size += sizeof(struct crush_work_bucket);
335 break;
336 }
337 /* Every bucket has a permutation array. */
338 c->working_size += c->buckets[b]->size * sizeof(__u32);
339 }
340}
341
f24e9980
SW		 342static struct crush_map *crush_decode(void *pbyval, void *end)
343{
344 struct crush_map *c;
c2acfd95 345 int err;
f24e9980
SW		 346 int i, j;
347 void **p = &pbyval;
348 void *start = pbyval;
349 u32 magic;
350
351 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
352
353 c = kzalloc(sizeof(*c), GFP_NOFS);
354 if (c == NULL)
355 return ERR_PTR(-ENOMEM);
356
5cf9c4a9
ID		 357 c->choose_args = RB_ROOT;
358
546f04ef
SW		 359 /* set tunables to default values */
360 c->choose_local_tries = 2;
361 c->choose_local_fallback_tries = 5;
362 c->choose_total_tries = 19;
1604f488 363 c->chooseleaf_descend_once = 0;
546f04ef 364
f24e9980 365 ceph_decode_need(p, end, 4*sizeof(u32), bad);
c89136ea 366 magic = ceph_decode_32(p);
f24e9980
SW		 367 if (magic != CRUSH_MAGIC) {
368 pr_err("crush_decode magic %x != current %x\n",
95c96174 369 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
f24e9980
SW		 370 goto bad;
371 }
c89136ea
SW		 372 c->max_buckets = ceph_decode_32(p);
373 c->max_rules = ceph_decode_32(p);
374 c->max_devices = ceph_decode_32(p);
f24e9980 375
f24e9980
SW		 376 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
377 if (c->buckets == NULL)
378 goto badmem;
379 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
380 if (c->rules == NULL)
381 goto badmem;
382
383 /* buckets */
384 for (i = 0; i < c->max_buckets; i++) {
385 int size = 0;
386 u32 alg;
387 struct crush_bucket *b;
388
389 ceph_decode_32_safe(p, end, alg, bad);
390 if (alg == 0) {
391 c->buckets[i] = NULL;
392 continue;
393 }
394 dout("crush_decode bucket %d off %x %p to %p\n",
395 i, (int)(*p-start), *p, end);
396
397 switch (alg) {
398 case CRUSH_BUCKET_UNIFORM:
399 size = sizeof(struct crush_bucket_uniform);
400 break;
401 case CRUSH_BUCKET_LIST:
402 size = sizeof(struct crush_bucket_list);
403 break;
404 case CRUSH_BUCKET_TREE:
405 size = sizeof(struct crush_bucket_tree);
406 break;
407 case CRUSH_BUCKET_STRAW:
408 size = sizeof(struct crush_bucket_straw);
409 break;
958a2765
ID		 410 case CRUSH_BUCKET_STRAW2:
411 size = sizeof(struct crush_bucket_straw2);
412 break;
f24e9980
SW		 413 default:
414 goto bad;
415 }
416 BUG_ON(size == 0);
417 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
418 if (b == NULL)
419 goto badmem;
420
421 ceph_decode_need(p, end, 4*sizeof(u32), bad);
c89136ea
SW		 422 b->id = ceph_decode_32(p);
423 b->type = ceph_decode_16(p);
fb690390
SW		 424 b->alg = ceph_decode_8(p);
425 b->hash = ceph_decode_8(p);
c89136ea
SW		 426 b->weight = ceph_decode_32(p);
427 b->size = ceph_decode_32(p);
f24e9980
SW		 428
429 dout("crush_decode bucket size %d off %x %p to %p\n",
430 b->size, (int)(*p-start), *p, end);
431
432 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
433 if (b->items == NULL)
434 goto badmem;
f24e9980
SW		 435
436 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
437 for (j = 0; j < b->size; j++)
c89136ea 438 b->items[j] = ceph_decode_32(p);
f24e9980
SW		 439
440 switch (b->alg) {
441 case CRUSH_BUCKET_UNIFORM:
442 err = crush_decode_uniform_bucket(p, end,
443 (struct crush_bucket_uniform *)b);
444 if (err < 0)
c2acfd95 445 goto fail;
f24e9980
SW		 446 break;
447 case CRUSH_BUCKET_LIST:
448 err = crush_decode_list_bucket(p, end,
449 (struct crush_bucket_list *)b);
450 if (err < 0)
c2acfd95 451 goto fail;
f24e9980
SW		 452 break;
453 case CRUSH_BUCKET_TREE:
454 err = crush_decode_tree_bucket(p, end,
455 (struct crush_bucket_tree *)b);
456 if (err < 0)
c2acfd95 457 goto fail;
f24e9980
SW		 458 break;
459 case CRUSH_BUCKET_STRAW:
460 err = crush_decode_straw_bucket(p, end,
461 (struct crush_bucket_straw *)b);
462 if (err < 0)
c2acfd95 463 goto fail;
f24e9980 464 break;
958a2765
ID		 465 case CRUSH_BUCKET_STRAW2:
466 err = crush_decode_straw2_bucket(p, end,
467 (struct crush_bucket_straw2 *)b);
468 if (err < 0)
c2acfd95 469 goto fail;
958a2765 470 break;
f24e9980
SW		 471 }
472 }
473
474 /* rules */
475 dout("rule vec is %p\n", c->rules);
476 for (i = 0; i < c->max_rules; i++) {
477 u32 yes;
478 struct crush_rule *r;
479
480 ceph_decode_32_safe(p, end, yes, bad);
481 if (!yes) {
482 dout("crush_decode NO rule %d off %x %p to %p\n",
483 i, (int)(*p-start), *p, end);
484 c->rules[i] = NULL;
485 continue;
486 }
487
488 dout("crush_decode rule %d off %x %p to %p\n",
489 i, (int)(*p-start), *p, end);
490
491 /* len */
492 ceph_decode_32_safe(p, end, yes, bad);
493#if BITS_PER_LONG == 32
64486697
XW		 494 if (yes > (ULONG_MAX - sizeof(*r))
495 / sizeof(struct crush_rule_step))
f24e9980
SW		 496 goto bad;
497#endif
498 r = c->rules[i] = kmalloc(sizeof(*r) +
499 yes*sizeof(struct crush_rule_step),
500 GFP_NOFS);
501 if (r == NULL)
502 goto badmem;
503 dout(" rule %d is at %p\n", i, r);
504 r->len = yes;
505 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
506 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
507 for (j = 0; j < r->len; j++) {
c89136ea
SW		 508 r->steps[j].op = ceph_decode_32(p);
509 r->steps[j].arg1 = ceph_decode_32(p);
510 r->steps[j].arg2 = ceph_decode_32(p);
f24e9980
SW		 511 }
512 }
513
278b1d70
ID		 514 ceph_decode_skip_map(p, end, 32, string, bad); /* type_map */
515 ceph_decode_skip_map(p, end, 32, string, bad); /* name_map */
516 ceph_decode_skip_map(p, end, 32, string, bad); /* rule_name_map */
546f04ef
SW		 517
518 /* tunables */
519 ceph_decode_need(p, end, 3*sizeof(u32), done);
520 c->choose_local_tries = ceph_decode_32(p);
521 c->choose_local_fallback_tries = ceph_decode_32(p);
522 c->choose_total_tries = ceph_decode_32(p);
b9b519b7 523 dout("crush decode tunable choose_local_tries = %d\n",
546f04ef 524 c->choose_local_tries);
b9b519b7 525 dout("crush decode tunable choose_local_fallback_tries = %d\n",
546f04ef 526 c->choose_local_fallback_tries);
b9b519b7 527 dout("crush decode tunable choose_total_tries = %d\n",
546f04ef 528 c->choose_total_tries);
f24e9980 529
1604f488
JS		 530 ceph_decode_need(p, end, sizeof(u32), done);
531 c->chooseleaf_descend_once = ceph_decode_32(p);
b9b519b7 532 dout("crush decode tunable chooseleaf_descend_once = %d\n",
1604f488
JS		 533 c->chooseleaf_descend_once);
534
f140662f
ID		 535 ceph_decode_need(p, end, sizeof(u8), done);
536 c->chooseleaf_vary_r = ceph_decode_8(p);
b9b519b7 537 dout("crush decode tunable chooseleaf_vary_r = %d\n",
f140662f
ID		 538 c->chooseleaf_vary_r);
539
b9b519b7
ID		 540 /* skip straw_calc_version, allowed_bucket_algs */
541 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
542 *p += sizeof(u8) + sizeof(u32);
543
544 ceph_decode_need(p, end, sizeof(u8), done);
545 c->chooseleaf_stable = ceph_decode_8(p);
546 dout("crush decode tunable chooseleaf_stable = %d\n",
547 c->chooseleaf_stable);
548
5cf9c4a9
ID		 549 if (*p != end) {
550 /* class_map */
551 ceph_decode_skip_map(p, end, 32, 32, bad);
552 /* class_name */
553 ceph_decode_skip_map(p, end, 32, string, bad);
554 /* class_bucket */
555 ceph_decode_skip_map_of_map(p, end, 32, 32, 32, bad);
556 }
557
558 if (*p != end) {
559 err = decode_choose_args(p, end, c);
560 if (err)
c2acfd95 561 goto fail;
5cf9c4a9
ID		 562 }
563
546f04ef 564done:
9afd30db 565 crush_finalize(c);
f24e9980
SW		 566 dout("crush_decode success\n");
567 return c;
568
569badmem:
570 err = -ENOMEM;
c2acfd95 571fail:
f24e9980
SW		 572 dout("crush_decode fail %d\n", err);
573 crush_destroy(c);
574 return ERR_PTR(err);
c2acfd95
ID		 575
576bad:
577 err = -EINVAL;
578 goto fail;
f24e9980
SW		 579}
580
f984cb76 581int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
51042122 582{
f984cb76 583 if (lhs->pool < rhs->pool)
5b191d99 584 return -1;
f984cb76 585 if (lhs->pool > rhs->pool)
5b191d99 586 return 1;
f984cb76 587 if (lhs->seed < rhs->seed)
51042122 588 return -1;
f984cb76 589 if (lhs->seed > rhs->seed)
51042122 590 return 1;
f984cb76 591
51042122
SW		 592 return 0;
593}
594
a02a946d
ID		 595int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs)
596{
597 int ret;
598
599 ret = ceph_pg_compare(&lhs->pgid, &rhs->pgid);
600 if (ret)
601 return ret;
602
603 if (lhs->shard < rhs->shard)
604 return -1;
605 if (lhs->shard > rhs->shard)
606 return 1;
607
608 return 0;
609}
610
a303bb0e
ID		 611static struct ceph_pg_mapping *alloc_pg_mapping(size_t payload_len)
612{
613 struct ceph_pg_mapping *pg;
614
615 pg = kmalloc(sizeof(*pg) + payload_len, GFP_NOIO);
616 if (!pg)
617 return NULL;
618
619 RB_CLEAR_NODE(&pg->node);
620 return pg;
621}
622
623static void free_pg_mapping(struct ceph_pg_mapping *pg)
624{
625 WARN_ON(!RB_EMPTY_NODE(&pg->node));
626
627 kfree(pg);
628}
629
f984cb76
ID		 630/*
631 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
632 * to a set of osds) and primary_temp (explicit primary setting)
633 */
ab75144b
ID		 634DEFINE_RB_FUNCS2(pg_mapping, struct ceph_pg_mapping, pgid, ceph_pg_compare,
635 RB_BYPTR, const struct ceph_pg *, node)
8adc8b3d 636
4fc51be8
SW		 637/*
638 * rbtree of pg pool info
639 */
640static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
641{
642 struct rb_node **p = &root->rb_node;
643 struct rb_node *parent = NULL;
644 struct ceph_pg_pool_info *pi = NULL;
645
646 while (*p) {
647 parent = *p;
648 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
649 if (new->id < pi->id)
650 p = &(*p)->rb_left;
651 else if (new->id > pi->id)
652 p = &(*p)->rb_right;
653 else
654 return -EEXIST;
655 }
656
657 rb_link_node(&new->node, parent, p);
658 rb_insert_color(&new->node, root);
659 return 0;
660}
661
4f6a7e5e 662static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
4fc51be8
SW		 663{
664 struct ceph_pg_pool_info *pi;
665 struct rb_node *n = root->rb_node;
666
667 while (n) {
668 pi = rb_entry(n, struct ceph_pg_pool_info, node);
669 if (id < pi->id)
670 n = n->rb_left;
671 else if (id > pi->id)
672 n = n->rb_right;
673 else
674 return pi;
675 }
676 return NULL;
677}
678
ce7f6a27
ID		 679struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
680{
681 return __lookup_pg_pool(&map->pg_pools, id);
682}
683
72afc71f
AE		 684const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
685{
686 struct ceph_pg_pool_info *pi;
687
688 if (id == CEPH_NOPOOL)
689 return NULL;
690
691 if (WARN_ON_ONCE(id > (u64) INT_MAX))
692 return NULL;
693
694 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
695
696 return pi ? pi->name : NULL;
697}
698EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
699
7669a2c9
YS		 700int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
701{
702 struct rb_node *rbp;
703
704 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
705 struct ceph_pg_pool_info *pi =
706 rb_entry(rbp, struct ceph_pg_pool_info, node);
707 if (pi->name && strcmp(pi->name, name) == 0)
708 return pi->id;
709 }
710 return -ENOENT;
711}
3d14c5d2 712EXPORT_SYMBOL(ceph_pg_poolid_by_name);
7669a2c9 713
2844a76a
SW		 714static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
715{
716 rb_erase(&pi->node, root);
717 kfree(pi->name);
718 kfree(pi);
719}
720
0f70c7ee 721static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
efd7576b 722{
4f6a7e5e
SW		 723 u8 ev, cv;
724 unsigned len, num;
725 void *pool_end;
726
727 ceph_decode_need(p, end, 2 + 4, bad);
728 ev = ceph_decode_8(p); /* encoding version */
729 cv = ceph_decode_8(p); /* compat version */
730 if (ev < 5) {
b9a67899 731 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
4f6a7e5e
SW		 732 return -EINVAL;
733 }
17a13e40 734 if (cv > 9) {
b9a67899 735 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
4f6a7e5e
SW		 736 return -EINVAL;
737 }
738 len = ceph_decode_32(p);
739 ceph_decode_need(p, end, len, bad);
740 pool_end = *p + len;
73a7e693 741
4f6a7e5e
SW		 742 pi->type = ceph_decode_8(p);
743 pi->size = ceph_decode_8(p);
744 pi->crush_ruleset = ceph_decode_8(p);
745 pi->object_hash = ceph_decode_8(p);
73a7e693 746
4f6a7e5e
SW		 747 pi->pg_num = ceph_decode_32(p);
748 pi->pgp_num = ceph_decode_32(p);
749
750 *p += 4 + 4; /* skip lpg* */
751 *p += 4; /* skip last_change */
752 *p += 8 + 4; /* skip snap_seq, snap_epoch */
753
754 /* skip snaps */
755 num = ceph_decode_32(p);
756 while (num--) {
757 *p += 8; /* snapid key */
758 *p += 1 + 1; /* versions */
759 len = ceph_decode_32(p);
760 *p += len;
73a7e693
SW		 761 }
762
17a13e40 763 /* skip removed_snaps */
4f6a7e5e
SW		 764 num = ceph_decode_32(p);
765 *p += num * (8 + 8);
766
767 *p += 8; /* skip auid */
768 pi->flags = ceph_decode_64(p);
17a13e40
ID		 769 *p += 4; /* skip crash_replay_interval */
770
771 if (ev >= 7)
04812acf
ID		 772 pi->min_size = ceph_decode_8(p);
773 else
774 pi->min_size = pi->size - pi->size / 2;
17a13e40
ID		 775
776 if (ev >= 8)
777 *p += 8 + 8; /* skip quota_max_* */
778
779 if (ev >= 9) {
780 /* skip tiers */
781 num = ceph_decode_32(p);
782 *p += num * 8;
783
784 *p += 8; /* skip tier_of */
785 *p += 1; /* skip cache_mode */
786
787 pi->read_tier = ceph_decode_64(p);
788 pi->write_tier = ceph_decode_64(p);
789 } else {
790 pi->read_tier = -1;
791 pi->write_tier = -1;
792 }
4f6a7e5e 793
04812acf
ID		 794 if (ev >= 10) {
795 /* skip properties */
796 num = ceph_decode_32(p);
797 while (num--) {
798 len = ceph_decode_32(p);
799 *p += len; /* key */
800 len = ceph_decode_32(p);
801 *p += len; /* val */
802 }
803 }
804
805 if (ev >= 11) {
806 /* skip hit_set_params */
807 *p += 1 + 1; /* versions */
808 len = ceph_decode_32(p);
809 *p += len;
810
811 *p += 4; /* skip hit_set_period */
812 *p += 4; /* skip hit_set_count */
813 }
814
815 if (ev >= 12)
816 *p += 4; /* skip stripe_width */
817
818 if (ev >= 13) {
819 *p += 8; /* skip target_max_bytes */
820 *p += 8; /* skip target_max_objects */
821 *p += 4; /* skip cache_target_dirty_ratio_micro */
822 *p += 4; /* skip cache_target_full_ratio_micro */
823 *p += 4; /* skip cache_min_flush_age */
824 *p += 4; /* skip cache_min_evict_age */
825 }
826
827 if (ev >= 14) {
828 /* skip erasure_code_profile */
829 len = ceph_decode_32(p);
830 *p += len;
831 }
832
8e48cf00
ID		 833 /*
834 * last_force_op_resend_preluminous, will be overridden if the
835 * map was encoded with RESEND_ON_SPLIT
836 */
04812acf
ID		 837 if (ev >= 15)
838 pi->last_force_request_resend = ceph_decode_32(p);
839 else
840 pi->last_force_request_resend = 0;
841
8e48cf00
ID		 842 if (ev >= 16)
843 *p += 4; /* skip min_read_recency_for_promote */
844
845 if (ev >= 17)
846 *p += 8; /* skip expected_num_objects */
847
848 if (ev >= 19)
849 *p += 4; /* skip cache_target_dirty_high_ratio_micro */
850
851 if (ev >= 20)
852 *p += 4; /* skip min_write_recency_for_promote */
853
854 if (ev >= 21)
855 *p += 1; /* skip use_gmt_hitset */
856
857 if (ev >= 22)
858 *p += 1; /* skip fast_read */
859
860 if (ev >= 23) {
861 *p += 4; /* skip hit_set_grade_decay_rate */
862 *p += 4; /* skip hit_set_search_last_n */
863 }
864
865 if (ev >= 24) {
866 /* skip opts */
867 *p += 1 + 1; /* versions */
868 len = ceph_decode_32(p);
869 *p += len;
870 }
871
872 if (ev >= 25)
873 pi->last_force_request_resend = ceph_decode_32(p);
874
4f6a7e5e
SW		 875 /* ignore the rest */
876
877 *p = pool_end;
878 calc_pg_masks(pi);
73a7e693
SW		 879 return 0;
880
881bad:
882 return -EINVAL;
efd7576b
SW		 883}
884
0f70c7ee 885static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
2844a76a
SW		 886{
887 struct ceph_pg_pool_info *pi;
4f6a7e5e
SW		 888 u32 num, len;
889 u64 pool;
2844a76a
SW		 890
891 ceph_decode_32_safe(p, end, num, bad);
892 dout(" %d pool names\n", num);
893 while (num--) {
4f6a7e5e 894 ceph_decode_64_safe(p, end, pool, bad);
2844a76a 895 ceph_decode_32_safe(p, end, len, bad);
4f6a7e5e 896 dout(" pool %llu len %d\n", pool, len);
ad3b904c 897 ceph_decode_need(p, end, len, bad);
2844a76a
SW		 898 pi = __lookup_pg_pool(&map->pg_pools, pool);
899 if (pi) {
ad3b904c
XW		 900 char *name = kstrndup(*p, len, GFP_NOFS);
901
902 if (!name)
903 return -ENOMEM;
2844a76a 904 kfree(pi->name);
ad3b904c
XW		 905 pi->name = name;
906 dout(" name is %s\n", pi->name);
2844a76a
SW		 907 }
908 *p += len;
909 }
910 return 0;
911
912bad:
913 return -EINVAL;
914}
915
916/*
917 * osd map
918 */
e5253a7b
ID		 919struct ceph_osdmap *ceph_osdmap_alloc(void)
920{
921 struct ceph_osdmap *map;
922
923 map = kzalloc(sizeof(*map), GFP_NOIO);
924 if (!map)
925 return NULL;
926
927 map->pg_pools = RB_ROOT;
928 map->pool_max = -1;
929 map->pg_temp = RB_ROOT;
930 map->primary_temp = RB_ROOT;
6f428df4
ID		 931 map->pg_upmap = RB_ROOT;
932 map->pg_upmap_items = RB_ROOT;
743efcff 933 mutex_init(&map->crush_workspace_mutex);
e5253a7b
ID		 934
935 return map;
936}
937
2844a76a
SW		 938void ceph_osdmap_destroy(struct ceph_osdmap *map)
939{
940 dout("osdmap_destroy %p\n", map);
941 if (map->crush)
942 crush_destroy(map->crush);
943 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
944 struct ceph_pg_mapping *pg =
945 rb_entry(rb_first(&map->pg_temp),
946 struct ceph_pg_mapping, node);
ab75144b
ID		 947 erase_pg_mapping(&map->pg_temp, pg);
948 free_pg_mapping(pg);
2844a76a 949 }
9686f94c
ID		 950 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
951 struct ceph_pg_mapping *pg =
952 rb_entry(rb_first(&map->primary_temp),
953 struct ceph_pg_mapping, node);
ab75144b
ID		 954 erase_pg_mapping(&map->primary_temp, pg);
955 free_pg_mapping(pg);
9686f94c 956 }
6f428df4
ID		 957 while (!RB_EMPTY_ROOT(&map->pg_upmap)) {
958 struct ceph_pg_mapping *pg =
959 rb_entry(rb_first(&map->pg_upmap),
960 struct ceph_pg_mapping, node);
961 rb_erase(&pg->node, &map->pg_upmap);
962 kfree(pg);
963 }
964 while (!RB_EMPTY_ROOT(&map->pg_upmap_items)) {
965 struct ceph_pg_mapping *pg =
966 rb_entry(rb_first(&map->pg_upmap_items),
967 struct ceph_pg_mapping, node);
968 rb_erase(&pg->node, &map->pg_upmap_items);
969 kfree(pg);
970 }
2844a76a
SW		 971 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
972 struct ceph_pg_pool_info *pi =
973 rb_entry(rb_first(&map->pg_pools),
974 struct ceph_pg_pool_info, node);
975 __remove_pg_pool(&map->pg_pools, pi);
976 }
977 kfree(map->osd_state);
978 kfree(map->osd_weight);
979 kfree(map->osd_addr);
2cfa34f2 980 kfree(map->osd_primary_affinity);
66a0e2d5 981 kfree(map->crush_workspace);
2844a76a
SW		 982 kfree(map);
983}
984
985/*
4d60351f
ID		 986 * Adjust max_osd value, (re)allocate arrays.
987 *
988 * The new elements are properly initialized.
2844a76a
SW		 989 */
990static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
991{
0bb05da2 992 u32 *state;
2844a76a 993 u32 *weight;
4d60351f
ID		 994 struct ceph_entity_addr *addr;
995 int i;
2844a76a 996
4d60351f 997 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
589506f1
LR		 998 if (!state)
999 return -ENOMEM;
1000 map->osd_state = state;
1001
4d60351f 1002 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
589506f1
LR		 1003 if (!weight)
1004 return -ENOMEM;
1005 map->osd_weight = weight;
4d60351f 1006
589506f1
LR		 1007 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
1008 if (!addr)
2844a76a 1009 return -ENOMEM;
589506f1 1010 map->osd_addr = addr;
2844a76a 1011
4d60351f 1012 for (i = map->max_osd; i < max; i++) {
589506f1
LR		 1013 map->osd_state[i] = 0;
1014 map->osd_weight[i] = CEPH_OSD_OUT;
1015 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
2844a76a
SW		 1016 }
1017
2cfa34f2
ID		 1018 if (map->osd_primary_affinity) {
1019 u32 *affinity;
1020
1021 affinity = krealloc(map->osd_primary_affinity,
1022 max*sizeof(*affinity), GFP_NOFS);
1023 if (!affinity)
1024 return -ENOMEM;
589506f1 1025 map->osd_primary_affinity = affinity;
2cfa34f2
ID		 1026
1027 for (i = map->max_osd; i < max; i++)
589506f1
LR		 1028 map->osd_primary_affinity[i] =
1029 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
2cfa34f2
ID		 1030 }
1031
2844a76a 1032 map->max_osd = max;
4d60351f 1033
2844a76a
SW		 1034 return 0;
1035}
1036
1b6a78b5
ID		 1037static int osdmap_set_crush(struct ceph_osdmap *map, struct crush_map *crush)
1038{
66a0e2d5 1039 void *workspace;
743efcff 1040 size_t work_size;
66a0e2d5 1041
1b6a78b5
ID		 1042 if (IS_ERR(crush))
1043 return PTR_ERR(crush);
1044
743efcff
ID		 1045 work_size = crush_work_size(crush, CEPH_PG_MAX_SIZE);
1046 dout("%s work_size %zu bytes\n", __func__, work_size);
1047 workspace = kmalloc(work_size, GFP_NOIO);
66a0e2d5
ID		 1048 if (!workspace) {
1049 crush_destroy(crush);
1050 return -ENOMEM;
1051 }
1052 crush_init_workspace(crush, workspace);
1053
1b6a78b5
ID		 1054 if (map->crush)
1055 crush_destroy(map->crush);
66a0e2d5 1056 kfree(map->crush_workspace);
1b6a78b5 1057 map->crush = crush;
66a0e2d5 1058 map->crush_workspace = workspace;
1b6a78b5
ID		 1059 return 0;
1060}
1061
ec7af972
ID		 1062#define OSDMAP_WRAPPER_COMPAT_VER 7
1063#define OSDMAP_CLIENT_DATA_COMPAT_VER 1
1064
1065/*
1066 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
1067 * to struct_v of the client_data section for new (v7 and above)
1068 * osdmaps.
1069 */
1070static int get_osdmap_client_data_v(void **p, void *end,
1071 const char *prefix, u8 *v)
1072{
1073 u8 struct_v;
1074
1075 ceph_decode_8_safe(p, end, struct_v, e_inval);
1076 if (struct_v >= 7) {
1077 u8 struct_compat;
1078
1079 ceph_decode_8_safe(p, end, struct_compat, e_inval);
1080 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
b9a67899
JP		 1081 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
1082 struct_v, struct_compat,
1083 OSDMAP_WRAPPER_COMPAT_VER, prefix);
ec7af972
ID		 1084 return -EINVAL;
1085 }
1086 *p += 4; /* ignore wrapper struct_len */
1087
1088 ceph_decode_8_safe(p, end, struct_v, e_inval);
1089 ceph_decode_8_safe(p, end, struct_compat, e_inval);
1090 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
b9a67899
JP		 1091 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
1092 struct_v, struct_compat,
1093 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
ec7af972
ID		 1094 return -EINVAL;
1095 }
1096 *p += 4; /* ignore client data struct_len */
1097 } else {
1098 u16 version;
1099
1100 *p -= 1;
1101 ceph_decode_16_safe(p, end, version, e_inval);
1102 if (version < 6) {
b9a67899
JP		 1103 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
1104 version, prefix);
ec7af972
ID		 1105 return -EINVAL;
1106 }
1107
1108 /* old osdmap enconding */
1109 struct_v = 0;
1110 }
1111
1112 *v = struct_v;
1113 return 0;
1114
1115e_inval:
1116 return -EINVAL;
1117}
1118
433fbdd3
ID		 1119static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
1120 bool incremental)
1121{
1122 u32 n;
1123
1124 ceph_decode_32_safe(p, end, n, e_inval);
1125 while (n--) {
1126 struct ceph_pg_pool_info *pi;
1127 u64 pool;
1128 int ret;
1129
1130 ceph_decode_64_safe(p, end, pool, e_inval);
1131
1132 pi = __lookup_pg_pool(&map->pg_pools, pool);
1133 if (!incremental || !pi) {
1134 pi = kzalloc(sizeof(*pi), GFP_NOFS);
1135 if (!pi)
1136 return -ENOMEM;
1137
1138 pi->id = pool;
1139
1140 ret = __insert_pg_pool(&map->pg_pools, pi);
1141 if (ret) {
1142 kfree(pi);
1143 return ret;
1144 }
1145 }
1146
1147 ret = decode_pool(p, end, pi);
1148 if (ret)
1149 return ret;
1150 }
1151
1152 return 0;
1153
1154e_inval:
1155 return -EINVAL;
1156}
1157
1158static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
1159{
1160 return __decode_pools(p, end, map, false);
1161}
1162
1163static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
1164{
1165 return __decode_pools(p, end, map, true);
1166}
1167
a303bb0e
ID		 1168typedef struct ceph_pg_mapping *(*decode_mapping_fn_t)(void **, void *, bool);
1169
1170static int decode_pg_mapping(void **p, void *end, struct rb_root *mapping_root,
1171 decode_mapping_fn_t fn, bool incremental)
10db634e
ID		 1172{
1173 u32 n;
1174
a303bb0e
ID		 1175 WARN_ON(!incremental && !fn);
1176
10db634e
ID		 1177 ceph_decode_32_safe(p, end, n, e_inval);
1178 while (n--) {
a303bb0e 1179 struct ceph_pg_mapping *pg;
10db634e 1180 struct ceph_pg pgid;
10db634e
ID		 1181 int ret;
1182
1183 ret = ceph_decode_pgid(p, end, &pgid);
1184 if (ret)
1185 return ret;
1186
ab75144b
ID		 1187 pg = lookup_pg_mapping(mapping_root, &pgid);
1188 if (pg) {
1189 WARN_ON(!incremental);
1190 erase_pg_mapping(mapping_root, pg);
1191 free_pg_mapping(pg);
1192 }
10db634e 1193
a303bb0e
ID		 1194 if (fn) {
1195 pg = fn(p, end, incremental);
1196 if (IS_ERR(pg))
1197 return PTR_ERR(pg);
10db634e 1198
a303bb0e
ID		 1199 if (pg) {
1200 pg->pgid = pgid; /* struct */
ab75144b 1201 insert_pg_mapping(mapping_root, pg);
10db634e
ID		 1202 }
1203 }
1204 }
1205
1206 return 0;
1207
1208e_inval:
1209 return -EINVAL;
1210}
1211
a303bb0e
ID		 1212static struct ceph_pg_mapping *__decode_pg_temp(void **p, void *end,
1213 bool incremental)
10db634e 1214{
a303bb0e
ID		 1215 struct ceph_pg_mapping *pg;
1216 u32 len, i;
10db634e 1217
a303bb0e
ID		 1218 ceph_decode_32_safe(p, end, len, e_inval);
1219 if (len == 0 && incremental)
1220 return NULL; /* new_pg_temp: [] to remove */
1221 if (len > (SIZE_MAX - sizeof(*pg)) / sizeof(u32))
1222 return ERR_PTR(-EINVAL);
10db634e 1223
a303bb0e
ID		 1224 ceph_decode_need(p, end, len * sizeof(u32), e_inval);
1225 pg = alloc_pg_mapping(len * sizeof(u32));
1226 if (!pg)
1227 return ERR_PTR(-ENOMEM);
d286de79 1228
a303bb0e
ID		 1229 pg->pg_temp.len = len;
1230 for (i = 0; i < len; i++)
1231 pg->pg_temp.osds[i] = ceph_decode_32(p);
d286de79 1232
a303bb0e 1233 return pg;
d286de79 1234
a303bb0e
ID		 1235e_inval:
1236 return ERR_PTR(-EINVAL);
1237}
d286de79 1238
a303bb0e
ID		 1239static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1240{
1241 return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
1242 false);
1243}
d286de79 1244
a303bb0e
ID		 1245static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
1246{
1247 return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
1248 true);
1249}
d286de79 1250
a303bb0e
ID		 1251static struct ceph_pg_mapping *__decode_primary_temp(void **p, void *end,
1252 bool incremental)
1253{
1254 struct ceph_pg_mapping *pg;
1255 u32 osd;
d286de79 1256
a303bb0e
ID		 1257 ceph_decode_32_safe(p, end, osd, e_inval);
1258 if (osd == (u32)-1 && incremental)
1259 return NULL; /* new_primary_temp: -1 to remove */
d286de79 1260
a303bb0e
ID		 1261 pg = alloc_pg_mapping(0);
1262 if (!pg)
1263 return ERR_PTR(-ENOMEM);
d286de79 1264
a303bb0e
ID		 1265 pg->primary_temp.osd = osd;
1266 return pg;
d286de79
ID		 1267
1268e_inval:
a303bb0e 1269 return ERR_PTR(-EINVAL);
d286de79
ID		 1270}
1271
1272static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
1273{
a303bb0e
ID		 1274 return decode_pg_mapping(p, end, &map->primary_temp,
1275 __decode_primary_temp, false);
d286de79
ID		 1276}
1277
1278static int decode_new_primary_temp(void **p, void *end,
1279 struct ceph_osdmap *map)
1280{
a303bb0e
ID		 1281 return decode_pg_mapping(p, end, &map->primary_temp,
1282 __decode_primary_temp, true);
d286de79
ID		 1283}
1284
2cfa34f2
ID		 1285u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
1286{
1287 BUG_ON(osd >= map->max_osd);
1288
1289 if (!map->osd_primary_affinity)
1290 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1291
1292 return map->osd_primary_affinity[osd];
1293}
1294
1295static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
1296{
1297 BUG_ON(osd >= map->max_osd);
1298
1299 if (!map->osd_primary_affinity) {
1300 int i;
1301
1302 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
1303 GFP_NOFS);
1304 if (!map->osd_primary_affinity)
1305 return -ENOMEM;
1306
1307 for (i = 0; i < map->max_osd; i++)
1308 map->osd_primary_affinity[i] =
1309 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1310 }
1311
1312 map->osd_primary_affinity[osd] = aff;
1313
1314 return 0;
1315}
1316
63a6993f
ID		 1317static int decode_primary_affinity(void **p, void *end,
1318 struct ceph_osdmap *map)
1319{
1320 u32 len, i;
1321
1322 ceph_decode_32_safe(p, end, len, e_inval);
1323 if (len == 0) {
1324 kfree(map->osd_primary_affinity);
1325 map->osd_primary_affinity = NULL;
1326 return 0;
1327 }
1328 if (len != map->max_osd)
1329 goto e_inval;
1330
1331 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1332
1333 for (i = 0; i < map->max_osd; i++) {
1334 int ret;
1335
1336 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1337 if (ret)
1338 return ret;
1339 }
1340
1341 return 0;
1342
1343e_inval:
1344 return -EINVAL;
1345}
1346
1347static int decode_new_primary_affinity(void **p, void *end,
1348 struct ceph_osdmap *map)
1349{
1350 u32 n;
1351
1352 ceph_decode_32_safe(p, end, n, e_inval);
1353 while (n--) {
1354 u32 osd, aff;
1355 int ret;
1356
1357 ceph_decode_32_safe(p, end, osd, e_inval);
1358 ceph_decode_32_safe(p, end, aff, e_inval);
1359
1360 ret = set_primary_affinity(map, osd, aff);
1361 if (ret)
1362 return ret;
f31da0f3
ID		 1363
1364 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
63a6993f
ID		 1365 }
1366
1367 return 0;
1368
1369e_inval:
1370 return -EINVAL;
1371}
1372
6f428df4
ID		 1373static struct ceph_pg_mapping *__decode_pg_upmap(void **p, void *end,
1374 bool __unused)
1375{
1376 return __decode_pg_temp(p, end, false);
1377}
1378
1379static int decode_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1380{
1381 return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
1382 false);
1383}
1384
1385static int decode_new_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1386{
1387 return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
1388 true);
1389}
1390
1391static int decode_old_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
1392{
1393 return decode_pg_mapping(p, end, &map->pg_upmap, NULL, true);
1394}
1395
1396static struct ceph_pg_mapping *__decode_pg_upmap_items(void **p, void *end,
1397 bool __unused)
1398{
1399 struct ceph_pg_mapping *pg;
1400 u32 len, i;
1401
1402 ceph_decode_32_safe(p, end, len, e_inval);
1403 if (len > (SIZE_MAX - sizeof(*pg)) / (2 * sizeof(u32)))
1404 return ERR_PTR(-EINVAL);
1405
1406 ceph_decode_need(p, end, 2 * len * sizeof(u32), e_inval);
f5cc6898 1407 pg = alloc_pg_mapping(2 * len * sizeof(u32));
6f428df4
ID		 1408 if (!pg)
1409 return ERR_PTR(-ENOMEM);
1410
1411 pg->pg_upmap_items.len = len;
1412 for (i = 0; i < len; i++) {
1413 pg->pg_upmap_items.from_to[i][0] = ceph_decode_32(p);
1414 pg->pg_upmap_items.from_to[i][1] = ceph_decode_32(p);
1415 }
1416
1417 return pg;
1418
1419e_inval:
1420 return ERR_PTR(-EINVAL);
1421}
1422
1423static int decode_pg_upmap_items(void **p, void *end, struct ceph_osdmap *map)
1424{
1425 return decode_pg_mapping(p, end, &map->pg_upmap_items,
1426 __decode_pg_upmap_items, false);
1427}
1428
1429static int decode_new_pg_upmap_items(void **p, void *end,
1430 struct ceph_osdmap *map)
1431{
1432 return decode_pg_mapping(p, end, &map->pg_upmap_items,
1433 __decode_pg_upmap_items, true);
1434}
1435
1436static int decode_old_pg_upmap_items(void **p, void *end,
1437 struct ceph_osdmap *map)
1438{
1439 return decode_pg_mapping(p, end, &map->pg_upmap_items, NULL, true);
1440}
1441
f24e9980
SW		 1442/*
1443 * decode a full map.
1444 */
a2505d63 1445static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
f24e9980 1446{
ec7af972 1447 u8 struct_v;
38a8d560 1448 u32 epoch = 0;
f24e9980 1449 void *start = *p;
3977058c
ID		 1450 u32 max;
1451 u32 len, i;
597b52f6 1452 int err;
f24e9980 1453
a2505d63 1454 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
f24e9980 1455
ec7af972
ID		 1456 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1457 if (err)
1458 goto bad;
f24e9980 1459
53bbaba9
ID		 1460 /* fsid, epoch, created, modified */
1461 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1462 sizeof(map->created) + sizeof(map->modified), e_inval);
f24e9980 1463 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
38a8d560 1464 epoch = map->epoch = ceph_decode_32(p);
f24e9980
SW		 1465 ceph_decode_copy(p, &map->created, sizeof(map->created));
1466 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1467
433fbdd3
ID		 1468 /* pools */
1469 err = decode_pools(p, end, map);
1470 if (err)
1471 goto bad;
2844a76a 1472
0f70c7ee
ID		 1473 /* pool_name */
1474 err = decode_pool_names(p, end, map);
597b52f6 1475 if (err)
4f6a7e5e 1476 goto bad;
2844a76a 1477
597b52f6 1478 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
f24e9980 1479
597b52f6 1480 ceph_decode_32_safe(p, end, map->flags, e_inval);
f24e9980 1481
3977058c
ID		 1482 /* max_osd */
1483 ceph_decode_32_safe(p, end, max, e_inval);
f24e9980
SW		 1484
1485 /* (re)alloc osd arrays */
1486 err = osdmap_set_max_osd(map, max);
597b52f6 1487 if (err)
f24e9980 1488 goto bad;
f24e9980 1489
2d88b2e0 1490 /* osd_state, osd_weight, osd_addrs->client_addr */
f24e9980 1491 ceph_decode_need(p, end, 3*sizeof(u32) +
0bb05da2
ID		 1492 map->max_osd*((struct_v >= 5 ? sizeof(u32) :
1493 sizeof(u8)) +
1494 sizeof(*map->osd_weight) +
597b52f6
ID		 1495 sizeof(*map->osd_addr)), e_inval);
1496
2d88b2e0
ID		 1497 if (ceph_decode_32(p) != map->max_osd)
1498 goto e_inval;
1499
0bb05da2
ID		 1500 if (struct_v >= 5) {
1501 for (i = 0; i < map->max_osd; i++)
1502 map->osd_state[i] = ceph_decode_32(p);
1503 } else {
1504 for (i = 0; i < map->max_osd; i++)
1505 map->osd_state[i] = ceph_decode_8(p);
1506 }
f24e9980 1507
2d88b2e0
ID		 1508 if (ceph_decode_32(p) != map->max_osd)
1509 goto e_inval;
1510
f24e9980 1511 for (i = 0; i < map->max_osd; i++)
c89136ea 1512 map->osd_weight[i] = ceph_decode_32(p);
f24e9980 1513
2d88b2e0
ID		 1514 if (ceph_decode_32(p) != map->max_osd)
1515 goto e_inval;
1516
f24e9980 1517 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
63f2d211
SW		 1518 for (i = 0; i < map->max_osd; i++)
1519 ceph_decode_addr(&map->osd_addr[i]);
f24e9980
SW		 1520
1521 /* pg_temp */
10db634e
ID		 1522 err = decode_pg_temp(p, end, map);
1523 if (err)
1524 goto bad;
f24e9980 1525
d286de79
ID		 1526 /* primary_temp */
1527 if (struct_v >= 1) {
1528 err = decode_primary_temp(p, end, map);
1529 if (err)
1530 goto bad;
1531 }
1532
63a6993f
ID		 1533 /* primary_affinity */
1534 if (struct_v >= 2) {
1535 err = decode_primary_affinity(p, end, map);
1536 if (err)
1537 goto bad;
1538 } else {
6f428df4 1539 WARN_ON(map->osd_primary_affinity);
63a6993f
ID		 1540 }
1541
f24e9980 1542 /* crush */
597b52f6 1543 ceph_decode_32_safe(p, end, len, e_inval);
1b6a78b5
ID		 1544 err = osdmap_set_crush(map, crush_decode(*p, min(*p + len, end)));
1545 if (err)
f24e9980 1546 goto bad;
f24e9980 1547
6f428df4
ID		 1548 *p += len;
1549 if (struct_v >= 3) {
1550 /* erasure_code_profiles */
1551 ceph_decode_skip_map_of_map(p, end, string, string, string,
00c8ebb3 1552 e_inval);
6f428df4
ID		 1553 }
1554
1555 if (struct_v >= 4) {
1556 err = decode_pg_upmap(p, end, map);
1557 if (err)
1558 goto bad;
1559
1560 err = decode_pg_upmap_items(p, end, map);
1561 if (err)
1562 goto bad;
1563 } else {
1564 WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap));
1565 WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap_items));
1566 }
1567
38a8d560 1568 /* ignore the rest */
f24e9980
SW		 1569 *p = end;
1570
38a8d560 1571 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
a2505d63 1572 return 0;
f24e9980 1573
597b52f6
ID		 1574e_inval:
1575 err = -EINVAL;
f24e9980 1576bad:
38a8d560
ID		 1577 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1578 err, epoch, (int)(*p - start), *p, start, end);
1579 print_hex_dump(KERN_DEBUG, "osdmap: ",
1580 DUMP_PREFIX_OFFSET, 16, 1,
1581 start, end - start, true);
a2505d63
ID		 1582 return err;
1583}
1584
1585/*
1586 * Allocate and decode a full map.
1587 */
1588struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1589{
1590 struct ceph_osdmap *map;
1591 int ret;
1592
e5253a7b 1593 map = ceph_osdmap_alloc();
a2505d63
ID		 1594 if (!map)
1595 return ERR_PTR(-ENOMEM);
1596
a2505d63
ID		 1597 ret = osdmap_decode(p, end, map);
1598 if (ret) {
1599 ceph_osdmap_destroy(map);
1600 return ERR_PTR(ret);
1601 }
1602
1603 return map;
f24e9980
SW		 1604}
1605
930c5328
ID		 1606/*
1607 * Encoding order is (new_up_client, new_state, new_weight). Need to
1608 * apply in the (new_weight, new_state, new_up_client) order, because
1609 * an incremental map may look like e.g.
1610 *
1611 * new_up_client: { osd=6, addr=... } # set osd_state and addr
1612 * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
1613 */
0bb05da2 1614static int decode_new_up_state_weight(void **p, void *end, u8 struct_v,
930c5328
ID		 1615 struct ceph_osdmap *map)
1616{
1617 void *new_up_client;
1618 void *new_state;
1619 void *new_weight_end;
1620 u32 len;
1621
1622 new_up_client = *p;
1623 ceph_decode_32_safe(p, end, len, e_inval);
1624 len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
1625 ceph_decode_need(p, end, len, e_inval);
1626 *p += len;
1627
1628 new_state = *p;
1629 ceph_decode_32_safe(p, end, len, e_inval);
0bb05da2 1630 len *= sizeof(u32) + (struct_v >= 5 ? sizeof(u32) : sizeof(u8));
930c5328
ID		 1631 ceph_decode_need(p, end, len, e_inval);
1632 *p += len;
1633
1634 /* new_weight */
1635 ceph_decode_32_safe(p, end, len, e_inval);
1636 while (len--) {
1637 s32 osd;
1638 u32 w;
1639
1640 ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
1641 osd = ceph_decode_32(p);
1642 w = ceph_decode_32(p);
1643 BUG_ON(osd >= map->max_osd);
1644 pr_info("osd%d weight 0x%x %s\n", osd, w,
1645 w == CEPH_OSD_IN ? "(in)" :
1646 (w == CEPH_OSD_OUT ? "(out)" : ""));
1647 map->osd_weight[osd] = w;
1648
1649 /*
1650 * If we are marking in, set the EXISTS, and clear the
1651 * AUTOOUT and NEW bits.
1652 */
1653 if (w) {
1654 map->osd_state[osd] |= CEPH_OSD_EXISTS;
1655 map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
1656 CEPH_OSD_NEW);
1657 }
1658 }
1659 new_weight_end = *p;
1660
1661 /* new_state (up/down) */
1662 *p = new_state;
1663 len = ceph_decode_32(p);
1664 while (len--) {
1665 s32 osd;
0bb05da2 1666 u32 xorstate;
930c5328
ID		 1667 int ret;
1668
1669 osd = ceph_decode_32(p);
0bb05da2
ID		 1670 if (struct_v >= 5)
1671 xorstate = ceph_decode_32(p);
1672 else
1673 xorstate = ceph_decode_8(p);
930c5328
ID		 1674 if (xorstate == 0)
1675 xorstate = CEPH_OSD_UP;
1676 BUG_ON(osd >= map->max_osd);
1677 if ((map->osd_state[osd] & CEPH_OSD_UP) &&
1678 (xorstate & CEPH_OSD_UP))
1679 pr_info("osd%d down\n", osd);
1680 if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
1681 (xorstate & CEPH_OSD_EXISTS)) {
1682 pr_info("osd%d does not exist\n", osd);
930c5328
ID		 1683 ret = set_primary_affinity(map, osd,
1684 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
1685 if (ret)
1686 return ret;
1687 memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
1688 map->osd_state[osd] = 0;
1689 } else {
1690 map->osd_state[osd] ^= xorstate;
1691 }
1692 }
1693
1694 /* new_up_client */
1695 *p = new_up_client;
1696 len = ceph_decode_32(p);
1697 while (len--) {
1698 s32 osd;
1699 struct ceph_entity_addr addr;
1700
1701 osd = ceph_decode_32(p);
1702 ceph_decode_copy(p, &addr, sizeof(addr));
1703 ceph_decode_addr(&addr);
1704 BUG_ON(osd >= map->max_osd);
1705 pr_info("osd%d up\n", osd);
1706 map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
1707 map->osd_addr[osd] = addr;
1708 }
1709
1710 *p = new_weight_end;
1711 return 0;
1712
1713e_inval:
1714 return -EINVAL;
1715}
1716
f24e9980
SW		 1717/*
1718 * decode and apply an incremental map update.
1719 */
1720struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
0c0a8de1 1721 struct ceph_osdmap *map)
f24e9980 1722{
f24e9980
SW		 1723 struct ceph_fsid fsid;
1724 u32 epoch = 0;
1725 struct ceph_timespec modified;
4f6a7e5e
SW		 1726 s32 len;
1727 u64 pool;
1728 __s64 new_pool_max;
1729 __s32 new_flags, max;
f24e9980 1730 void *start = *p;
86f1742b 1731 int err;
ec7af972 1732 u8 struct_v;
f24e9980 1733
38a8d560
ID		 1734 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1735
ec7af972
ID		 1736 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1737 if (err)
1738 goto bad;
f24e9980 1739
53bbaba9
ID		 1740 /* fsid, epoch, modified, new_pool_max, new_flags */
1741 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1742 sizeof(u64) + sizeof(u32), e_inval);
f24e9980 1743 ceph_decode_copy(p, &fsid, sizeof(fsid));
c89136ea 1744 epoch = ceph_decode_32(p);
f24e9980
SW		 1745 BUG_ON(epoch != map->epoch+1);
1746 ceph_decode_copy(p, &modified, sizeof(modified));
4f6a7e5e 1747 new_pool_max = ceph_decode_64(p);
c89136ea 1748 new_flags = ceph_decode_32(p);
f24e9980
SW		 1749
1750 /* full map? */
86f1742b 1751 ceph_decode_32_safe(p, end, len, e_inval);
f24e9980
SW		 1752 if (len > 0) {
1753 dout("apply_incremental full map len %d, %p to %p\n",
1754 len, *p, end);
a2505d63 1755 return ceph_osdmap_decode(p, min(*p+len, end));
f24e9980
SW		 1756 }
1757
1758 /* new crush? */
86f1742b 1759 ceph_decode_32_safe(p, end, len, e_inval);
f24e9980 1760 if (len > 0) {
1b6a78b5
ID		 1761 err = osdmap_set_crush(map,
1762 crush_decode(*p, min(*p + len, end)));
1763 if (err)
86f1742b 1764 goto bad;
cebc5be6 1765 *p += len;
f24e9980
SW		 1766 }
1767
1768 /* new flags? */
1769 if (new_flags >= 0)
1770 map->flags = new_flags;
4fc51be8
SW		 1771 if (new_pool_max >= 0)
1772 map->pool_max = new_pool_max;
f24e9980 1773
f24e9980 1774 /* new max? */
53bbaba9 1775 ceph_decode_32_safe(p, end, max, e_inval);
f24e9980
SW		 1776 if (max >= 0) {
1777 err = osdmap_set_max_osd(map, max);
86f1742b 1778 if (err)
f24e9980
SW		 1779 goto bad;
1780 }
1781
1782 map->epoch++;
31456665 1783 map->modified = modified;
f24e9980 1784
433fbdd3
ID		 1785 /* new_pools */
1786 err = decode_new_pools(p, end, map);
1787 if (err)
1788 goto bad;
9464d008 1789
0f70c7ee
ID		 1790 /* new_pool_names */
1791 err = decode_pool_names(p, end, map);
9464d008
ID		 1792 if (err)
1793 goto bad;
f24e9980 1794
4fc51be8 1795 /* old_pool */
86f1742b 1796 ceph_decode_32_safe(p, end, len, e_inval);
4fc51be8
SW		 1797 while (len--) {
1798 struct ceph_pg_pool_info *pi;
1799
86f1742b 1800 ceph_decode_64_safe(p, end, pool, e_inval);
4fc51be8 1801 pi = __lookup_pg_pool(&map->pg_pools, pool);
2844a76a
SW		 1802 if (pi)
1803 __remove_pg_pool(&map->pg_pools, pi);
4fc51be8 1804 }
f24e9980 1805
930c5328 1806 /* new_up_client, new_state, new_weight */
0bb05da2 1807 err = decode_new_up_state_weight(p, end, struct_v, map);
930c5328
ID		 1808 if (err)
1809 goto bad;
f24e9980
SW		 1810
1811 /* new_pg_temp */
10db634e
ID		 1812 err = decode_new_pg_temp(p, end, map);
1813 if (err)
1814 goto bad;
f24e9980 1815
d286de79
ID		 1816 /* new_primary_temp */
1817 if (struct_v >= 1) {
1818 err = decode_new_primary_temp(p, end, map);
1819 if (err)
1820 goto bad;
1821 }
1822
63a6993f
ID		 1823 /* new_primary_affinity */
1824 if (struct_v >= 2) {
1825 err = decode_new_primary_affinity(p, end, map);
1826 if (err)
1827 goto bad;
1828 }
1829
6f428df4
ID		 1830 if (struct_v >= 3) {
1831 /* new_erasure_code_profiles */
1832 ceph_decode_skip_map_of_map(p, end, string, string, string,
00c8ebb3 1833 e_inval);
6f428df4 1834 /* old_erasure_code_profiles */
00c8ebb3 1835 ceph_decode_skip_set(p, end, string, e_inval);
6f428df4
ID		 1836 }
1837
1838 if (struct_v >= 4) {
1839 err = decode_new_pg_upmap(p, end, map);
1840 if (err)
1841 goto bad;
1842
1843 err = decode_old_pg_upmap(p, end, map);
1844 if (err)
1845 goto bad;
1846
1847 err = decode_new_pg_upmap_items(p, end, map);
1848 if (err)
1849 goto bad;
1850
1851 err = decode_old_pg_upmap_items(p, end, map);
1852 if (err)
1853 goto bad;
1854 }
1855
f24e9980
SW		 1856 /* ignore the rest */
1857 *p = end;
38a8d560
ID		 1858
1859 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
f24e9980
SW		 1860 return map;
1861
86f1742b
ID		 1862e_inval:
1863 err = -EINVAL;
f24e9980 1864bad:
38a8d560
ID		 1865 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1866 err, epoch, (int)(*p - start), *p, start, end);
9ec7cab1
SW		 1867 print_hex_dump(KERN_DEBUG, "osdmap: ",
1868 DUMP_PREFIX_OFFSET, 16, 1,
1869 start, end - start, true);
f24e9980
SW		 1870 return ERR_PTR(err);
1871}
1872
30c156d9
YZ		 1873void ceph_oloc_copy(struct ceph_object_locator *dest,
1874 const struct ceph_object_locator *src)
1875{
ca35ffea 1876 ceph_oloc_destroy(dest);
30c156d9
YZ		 1877
1878 dest->pool = src->pool;
1879 if (src->pool_ns)
1880 dest->pool_ns = ceph_get_string(src->pool_ns);
ca35ffea
ID		 1881 else
1882 dest->pool_ns = NULL;
30c156d9
YZ		 1883}
1884EXPORT_SYMBOL(ceph_oloc_copy);
1885
1886void ceph_oloc_destroy(struct ceph_object_locator *oloc)
1887{
1888 ceph_put_string(oloc->pool_ns);
1889}
1890EXPORT_SYMBOL(ceph_oloc_destroy);
1891
d30291b9
ID		 1892void ceph_oid_copy(struct ceph_object_id *dest,
1893 const struct ceph_object_id *src)
1894{
ca35ffea 1895 ceph_oid_destroy(dest);
d30291b9
ID		 1896
1897 if (src->name != src->inline_name) {
1898 /* very rare, see ceph_object_id definition */
1899 dest->name = kmalloc(src->name_len + 1,
1900 GFP_NOIO | __GFP_NOFAIL);
ca35ffea
ID		 1901 } else {
1902 dest->name = dest->inline_name;
d30291b9 1903 }
d30291b9
ID		 1904 memcpy(dest->name, src->name, src->name_len + 1);
1905 dest->name_len = src->name_len;
1906}
1907EXPORT_SYMBOL(ceph_oid_copy);
1908
1909static __printf(2, 0)
1910int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1911{
1912 int len;
1913
1914 WARN_ON(!ceph_oid_empty(oid));
1915
1916 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1917 if (len >= sizeof(oid->inline_name))
1918 return len;
1919
1920 oid->name_len = len;
1921 return 0;
1922}
1923
1924/*
1925 * If oid doesn't fit into inline buffer, BUG.
1926 */
1927void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1928{
1929 va_list ap;
1930
1931 va_start(ap, fmt);
1932 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1933 va_end(ap);
1934}
1935EXPORT_SYMBOL(ceph_oid_printf);
1936
1937static __printf(3, 0)
1938int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1939 const char *fmt, va_list ap)
1940{
1941 va_list aq;
1942 int len;
1943
1944 va_copy(aq, ap);
1945 len = oid_printf_vargs(oid, fmt, aq);
1946 va_end(aq);
1947
1948 if (len) {
1949 char *external_name;
1950
1951 external_name = kmalloc(len + 1, gfp);
1952 if (!external_name)
1953 return -ENOMEM;
f24e9980 1954
d30291b9
ID		 1955 oid->name = external_name;
1956 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1957 oid->name_len = len;
1958 }
f24e9980 1959
d30291b9
ID		 1960 return 0;
1961}
1962
1963/*
1964 * If oid doesn't fit into inline buffer, allocate.
1965 */
1966int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1967 const char *fmt, ...)
1968{
1969 va_list ap;
1970 int ret;
1971
1972 va_start(ap, fmt);
1973 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1974 va_end(ap);
1975
1976 return ret;
1977}
1978EXPORT_SYMBOL(ceph_oid_aprintf);
1979
1980void ceph_oid_destroy(struct ceph_object_id *oid)
1981{
1982 if (oid->name != oid->inline_name)
1983 kfree(oid->name);
1984}
1985EXPORT_SYMBOL(ceph_oid_destroy);
f24e9980 1986
63244fa1
ID		 1987/*
1988 * osds only
1989 */
1990static bool __osds_equal(const struct ceph_osds *lhs,
1991 const struct ceph_osds *rhs)
1992{
1993 if (lhs->size == rhs->size &&
1994 !memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
1995 return true;
1996
1997 return false;
1998}
1999
2000/*
2001 * osds + primary
2002 */
2003static bool osds_equal(const struct ceph_osds *lhs,
2004 const struct ceph_osds *rhs)
2005{
2006 if (__osds_equal(lhs, rhs) &&
2007 lhs->primary == rhs->primary)
2008 return true;
2009
2010 return false;
2011}
2012
6f3bfd45
ID		 2013static bool osds_valid(const struct ceph_osds *set)
2014{
2015 /* non-empty set */
2016 if (set->size > 0 && set->primary >= 0)
2017 return true;
2018
2019 /* empty can_shift_osds set */
2020 if (!set->size && set->primary == -1)
2021 return true;
2022
2023 /* empty !can_shift_osds set - all NONE */
2024 if (set->size > 0 && set->primary == -1) {
2025 int i;
2026
2027 for (i = 0; i < set->size; i++) {
2028 if (set->osds[i] != CRUSH_ITEM_NONE)
2029 break;
2030 }
2031 if (i == set->size)
2032 return true;
2033 }
2034
2035 return false;
2036}
2037
2038void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
2039{
2040 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
2041 dest->size = src->size;
2042 dest->primary = src->primary;
2043}
2044
7de030d6
ID		 2045bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
2046 u32 new_pg_num)
63244fa1
ID		 2047{
2048 int old_bits = calc_bits_of(old_pg_num);
2049 int old_mask = (1 << old_bits) - 1;
2050 int n;
2051
2052 WARN_ON(pgid->seed >= old_pg_num);
2053 if (new_pg_num <= old_pg_num)
2054 return false;
2055
2056 for (n = 1; ; n++) {
2057 int next_bit = n << (old_bits - 1);
2058 u32 s = next_bit | pgid->seed;
2059
2060 if (s < old_pg_num || s == pgid->seed)
2061 continue;
2062 if (s >= new_pg_num)
2063 break;
2064
2065 s = ceph_stable_mod(s, old_pg_num, old_mask);
2066 if (s == pgid->seed)
2067 return true;
2068 }
2069
2070 return false;
2071}
2072
2073bool ceph_is_new_interval(const struct ceph_osds *old_acting,
2074 const struct ceph_osds *new_acting,
2075 const struct ceph_osds *old_up,
2076 const struct ceph_osds *new_up,
2077 int old_size,
2078 int new_size,
2079 int old_min_size,
2080 int new_min_size,
2081 u32 old_pg_num,
2082 u32 new_pg_num,
2083 bool old_sort_bitwise,
2084 bool new_sort_bitwise,
ae78dd81
ID		 2085 bool old_recovery_deletes,
2086 bool new_recovery_deletes,
63244fa1
ID		 2087 const struct ceph_pg *pgid)
2088{
2089 return !osds_equal(old_acting, new_acting) ||
2090 !osds_equal(old_up, new_up) ||
2091 old_size != new_size ||
2092 old_min_size != new_min_size ||
7de030d6 2093 ceph_pg_is_split(pgid, old_pg_num, new_pg_num) ||
ae78dd81
ID		 2094 old_sort_bitwise != new_sort_bitwise ||
2095 old_recovery_deletes != new_recovery_deletes;
63244fa1
ID		 2096}
2097
2098static int calc_pg_rank(int osd, const struct ceph_osds *acting)
2099{
2100 int i;
2101
2102 for (i = 0; i < acting->size; i++) {
2103 if (acting->osds[i] == osd)
2104 return i;
2105 }
2106
2107 return -1;
2108}
2109
2110static bool primary_changed(const struct ceph_osds *old_acting,
2111 const struct ceph_osds *new_acting)
2112{
2113 if (!old_acting->size && !new_acting->size)
2114 return false; /* both still empty */
2115
2116 if (!old_acting->size ^ !new_acting->size)
2117 return true; /* was empty, now not, or vice versa */
2118
2119 if (old_acting->primary != new_acting->primary)
2120 return true; /* primary changed */
2121
2122 if (calc_pg_rank(old_acting->primary, old_acting) !=
2123 calc_pg_rank(new_acting->primary, new_acting))
2124 return true;
2125
2126 return false; /* same primary (tho replicas may have changed) */
2127}
2128
2129bool ceph_osds_changed(const struct ceph_osds *old_acting,
2130 const struct ceph_osds *new_acting,
2131 bool any_change)
2132{
2133 if (primary_changed(old_acting, new_acting))
2134 return true;
2135
2136 if (any_change && !__osds_equal(old_acting, new_acting))
2137 return true;
2138
2139 return false;
2140}
2141
f24e9980
SW		 2142/*
2143 * calculate file layout from given offset, length.
2144 * fill in correct oid, logical length, and object extent
2145 * offset, length.
2146 *
2147 * for now, we write only a single su, until we can
2148 * pass a stride back to the caller.
2149 */
d63b77f4 2150int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
e8afad65 2151 u64 off, u64 len,
645a1025 2152 u64 *ono,
f24e9980
SW		 2153 u64 *oxoff, u64 *oxlen)
2154{
7627151e
YZ		 2155 u32 osize = layout->object_size;
2156 u32 su = layout->stripe_unit;
2157 u32 sc = layout->stripe_count;
f24e9980
SW		 2158 u32 bl, stripeno, stripepos, objsetno;
2159 u32 su_per_object;
ff1d1f71 2160 u64 t, su_offset;
f24e9980 2161
e8afad65 2162 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
f24e9980 2163 osize, su);
d63b77f4
SW		 2164 if (su == 0 || sc == 0)
2165 goto invalid;
35e054a6 2166 su_per_object = osize / su;
d63b77f4
SW		 2167 if (su_per_object == 0)
2168 goto invalid;
f24e9980
SW		 2169 dout("osize %u / su %u = su_per_object %u\n", osize, su,
2170 su_per_object);
2171
d63b77f4
SW		 2172 if ((su & ~PAGE_MASK) != 0)
2173 goto invalid;
2174
f24e9980
SW		 2175 /* bl = *off / su; */
2176 t = off;
2177 do_div(t, su);
2178 bl = t;
2179 dout("off %llu / su %u = bl %u\n", off, su, bl);
2180
2181 stripeno = bl / sc;
2182 stripepos = bl % sc;
2183 objsetno = stripeno / su_per_object;
2184
645a1025 2185 *ono = objsetno * sc + stripepos;
95c96174 2186 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
645a1025
SW		 2187
2188 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
f24e9980 2189 t = off;
ff1d1f71
NW		 2190 su_offset = do_div(t, su);
2191 *oxoff = su_offset + (stripeno % su_per_object) * su;
2192
2193 /*
2194 * Calculate the length of the extent being written to the selected
e8afad65 2195 * object. This is the minimum of the full length requested (len) or
ff1d1f71
NW		 2196 * the remainder of the current stripe being written to.
2197 */
e8afad65 2198 *oxlen = min_t(u64, len, su - su_offset);
f24e9980
SW		 2199
2200 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
d63b77f4
SW		 2201 return 0;
2202
2203invalid:
2204 dout(" invalid layout\n");
2205 *ono = 0;
2206 *oxoff = 0;
2207 *oxlen = 0;
2208 return -EINVAL;
f24e9980 2209}
3d14c5d2 2210EXPORT_SYMBOL(ceph_calc_file_object_mapping);
f24e9980
SW		 2211
2212/*
d9591f5e
ID		 2213 * Map an object into a PG.
2214 *
2215 * Should only be called with target_oid and target_oloc (as opposed to
2216 * base_oid and base_oloc), since tiering isn't taken into account.
f24e9980 2217 */
df28152d
ID		 2218int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
2219 const struct ceph_object_id *oid,
2220 const struct ceph_object_locator *oloc,
2221 struct ceph_pg *raw_pgid)
f24e9980 2222{
df28152d 2223 WARN_ON(pi->id != oloc->pool);
f24e9980 2224
30c156d9
YZ		 2225 if (!oloc->pool_ns) {
2226 raw_pgid->pool = oloc->pool;
2227 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
2228 oid->name_len);
2229 dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
2230 raw_pgid->pool, raw_pgid->seed);
2231 } else {
2232 char stack_buf[256];
2233 char *buf = stack_buf;
2234 int nsl = oloc->pool_ns->len;
2235 size_t total = nsl + 1 + oid->name_len;
2236
2237 if (total > sizeof(stack_buf)) {
2238 buf = kmalloc(total, GFP_NOIO);
2239 if (!buf)
2240 return -ENOMEM;
2241 }
2242 memcpy(buf, oloc->pool_ns->str, nsl);
2243 buf[nsl] = '\037';
2244 memcpy(buf + nsl + 1, oid->name, oid->name_len);
2245 raw_pgid->pool = oloc->pool;
2246 raw_pgid->seed = ceph_str_hash(pi->object_hash, buf, total);
2247 if (buf != stack_buf)
2248 kfree(buf);
2249 dout("%s %s ns %.*s -> raw_pgid %llu.%x\n", __func__,
2250 oid->name, nsl, oloc->pool_ns->str,
2251 raw_pgid->pool, raw_pgid->seed);
2252 }
f24e9980
SW		 2253 return 0;
2254}
df28152d
ID		 2255
2256int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
2257 const struct ceph_object_id *oid,
2258 const struct ceph_object_locator *oloc,
2259 struct ceph_pg *raw_pgid)
2260{
2261 struct ceph_pg_pool_info *pi;
2262
2263 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
2264 if (!pi)
2265 return -ENOENT;
2266
2267 return __ceph_object_locator_to_pg(pi, oid, oloc, raw_pgid);
2268}
d9591f5e 2269EXPORT_SYMBOL(ceph_object_locator_to_pg);
f24e9980 2270
6f3bfd45
ID		 2271/*
2272 * Map a raw PG (full precision ps) into an actual PG.
2273 */
2274static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
2275 const struct ceph_pg *raw_pgid,
2276 struct ceph_pg *pgid)
2277{
2278 pgid->pool = raw_pgid->pool;
2279 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
2280 pi->pg_num_mask);
2281}
2282
2283/*
2284 * Map a raw PG (full precision ps) into a placement ps (placement
2285 * seed). Include pool id in that value so that different pools don't
2286 * use the same seeds.
2287 */
2288static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
2289 const struct ceph_pg *raw_pgid)
2290{
2291 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
2292 /* hash pool id and seed so that pool PGs do not overlap */
2293 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
2294 ceph_stable_mod(raw_pgid->seed,
2295 pi->pgp_num,
2296 pi->pgp_num_mask),
2297 raw_pgid->pool);
2298 } else {
2299 /*
2300 * legacy behavior: add ps and pool together. this is
2301 * not a great approach because the PGs from each pool
2302 * will overlap on top of each other: 0.5 == 1.4 ==
2303 * 2.3 == ...
2304 */
2305 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
2306 pi->pgp_num_mask) +
2307 (unsigned)raw_pgid->pool;
2308 }
2309}
2310
e17e8969
ID		 2311/*
2312 * Magic value used for a "default" fallback choose_args, used if the
2313 * crush_choose_arg_map passed to do_crush() does not exist. If this
2314 * also doesn't exist, fall back to canonical weights.
2315 */
2316#define CEPH_DEFAULT_CHOOSE_ARGS -1
2317
9d521470
ID		 2318static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
2319 int *result, int result_max,
5cf9c4a9 2320 const __u32 *weight, int weight_max,
e17e8969 2321 s64 choose_args_index)
e8ef19c4 2322{
5cf9c4a9 2323 struct crush_choose_arg_map *arg_map;
9d521470
ID		 2324 int r;
2325
2326 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
2327
5cf9c4a9
ID		 2328 arg_map = lookup_choose_arg_map(&map->crush->choose_args,
2329 choose_args_index);
e17e8969
ID		 2330 if (!arg_map)
2331 arg_map = lookup_choose_arg_map(&map->crush->choose_args,
2332 CEPH_DEFAULT_CHOOSE_ARGS);
5cf9c4a9 2333
743efcff 2334 mutex_lock(&map->crush_workspace_mutex);
9d521470 2335 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
5cf9c4a9
ID		 2336 weight, weight_max, map->crush_workspace,
2337 arg_map ? arg_map->args : NULL);
743efcff 2338 mutex_unlock(&map->crush_workspace_mutex);
e8ef19c4 2339
9d521470 2340 return r;
e8ef19c4
ID		 2341}
2342
1c2e7b45
ID		 2343static void remove_nonexistent_osds(struct ceph_osdmap *osdmap,
2344 struct ceph_pg_pool_info *pi,
2345 struct ceph_osds *set)
2346{
2347 int i;
2348
2349 if (ceph_can_shift_osds(pi)) {
2350 int removed = 0;
2351
2352 /* shift left */
2353 for (i = 0; i < set->size; i++) {
2354 if (!ceph_osd_exists(osdmap, set->osds[i])) {
2355 removed++;
2356 continue;
2357 }
2358 if (removed)
2359 set->osds[i - removed] = set->osds[i];
2360 }
2361 set->size -= removed;
2362 } else {
2363 /* set dne devices to NONE */
2364 for (i = 0; i < set->size; i++) {
2365 if (!ceph_osd_exists(osdmap, set->osds[i]))
2366 set->osds[i] = CRUSH_ITEM_NONE;
2367 }
2368 }
2369}
2370
2bd93d4d 2371/*
1c2e7b45
ID		 2372 * Calculate raw set (CRUSH output) for given PG and filter out
2373 * nonexistent OSDs. ->primary is undefined for a raw set.
2bd93d4d 2374 *
6f3bfd45 2375 * Placement seed (CRUSH input) is returned through @ppps.
2bd93d4d 2376 */
6f3bfd45
ID		 2377static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
2378 struct ceph_pg_pool_info *pi,
2379 const struct ceph_pg *raw_pgid,
2380 struct ceph_osds *raw,
2381 u32 *ppps)
2bd93d4d 2382{
6f3bfd45 2383 u32 pps = raw_pg_to_pps(pi, raw_pgid);
2bd93d4d
ID		 2384 int ruleno;
2385 int len;
2386
6f3bfd45
ID		 2387 ceph_osds_init(raw);
2388 if (ppps)
2389 *ppps = pps;
2390
2391 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
2392 pi->size);
2bd93d4d
ID		 2393 if (ruleno < 0) {
2394 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
6f3bfd45
ID		 2395 pi->id, pi->crush_ruleset, pi->type, pi->size);
2396 return;
2bd93d4d
ID		 2397 }
2398
ef9324bb
ID		 2399 if (pi->size > ARRAY_SIZE(raw->osds)) {
2400 pr_err_ratelimited("pool %lld ruleset %d type %d too wide: size %d > %zu\n",
2401 pi->id, pi->crush_ruleset, pi->type, pi->size,
2402 ARRAY_SIZE(raw->osds));
2403 return;
2404 }
2405
2406 len = do_crush(osdmap, ruleno, pps, raw->osds, pi->size,
5cf9c4a9 2407 osdmap->osd_weight, osdmap->max_osd, pi->id);
2bd93d4d
ID		 2408 if (len < 0) {
2409 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
6f3bfd45
ID		 2410 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
2411 pi->size);
2412 return;
2bd93d4d
ID		 2413 }
2414
6f3bfd45 2415 raw->size = len;
1c2e7b45
ID		 2416 remove_nonexistent_osds(osdmap, pi, raw);
2417}
2418
2419/* apply pg_upmap[_items] mappings */
2420static void apply_upmap(struct ceph_osdmap *osdmap,
2421 const struct ceph_pg *pgid,
2422 struct ceph_osds *raw)
2423{
2424 struct ceph_pg_mapping *pg;
2425 int i, j;
2426
2427 pg = lookup_pg_mapping(&osdmap->pg_upmap, pgid);
2428 if (pg) {
2429 /* make sure targets aren't marked out */
2430 for (i = 0; i < pg->pg_upmap.len; i++) {
2431 int osd = pg->pg_upmap.osds[i];
2432
2433 if (osd != CRUSH_ITEM_NONE &&
2434 osd < osdmap->max_osd &&
2435 osdmap->osd_weight[osd] == 0) {
2436 /* reject/ignore explicit mapping */
2437 return;
2438 }
2439 }
2440 for (i = 0; i < pg->pg_upmap.len; i++)
2441 raw->osds[i] = pg->pg_upmap.osds[i];
2442 raw->size = pg->pg_upmap.len;
f53b7665 2443 /* check and apply pg_upmap_items, if any */
1c2e7b45
ID		 2444 }
2445
2446 pg = lookup_pg_mapping(&osdmap->pg_upmap_items, pgid);
2447 if (pg) {
f53b7665
ID		 2448 for (i = 0; i < raw->size; i++) {
2449 for (j = 0; j < pg->pg_upmap_items.len; j++) {
2450 int from = pg->pg_upmap_items.from_to[j][0];
2451 int to = pg->pg_upmap_items.from_to[j][1];
2452
2453 if (from == raw->osds[i]) {
2454 if (!(to != CRUSH_ITEM_NONE &&
2455 to < osdmap->max_osd &&
2456 osdmap->osd_weight[to] == 0))
2457 raw->osds[i] = to;
1c2e7b45
ID		 2458 break;
2459 }
1c2e7b45
ID		 2460 }
2461 }
2462 }
2bd93d4d
ID		 2463}
2464
2465/*
6f3bfd45
ID		 2466 * Given raw set, calculate up set and up primary. By definition of an
2467 * up set, the result won't contain nonexistent or down OSDs.
2bd93d4d 2468 *
6f3bfd45
ID		 2469 * This is done in-place - on return @set is the up set. If it's
2470 * empty, ->primary will remain undefined.
2bd93d4d 2471 */
6f3bfd45
ID		 2472static void raw_to_up_osds(struct ceph_osdmap *osdmap,
2473 struct ceph_pg_pool_info *pi,
2474 struct ceph_osds *set)
2bd93d4d 2475{
2bd93d4d
ID		 2476 int i;
2477
6f3bfd45
ID		 2478 /* ->primary is undefined for a raw set */
2479 BUG_ON(set->primary != -1);
2480
2481 if (ceph_can_shift_osds(pi)) {
2bd93d4d
ID		 2482 int removed = 0;
2483
6f3bfd45
ID		 2484 /* shift left */
2485 for (i = 0; i < set->size; i++) {
2486 if (ceph_osd_is_down(osdmap, set->osds[i])) {
2bd93d4d
ID		 2487 removed++;
2488 continue;
2489 }
2490 if (removed)
6f3bfd45 2491 set->osds[i - removed] = set->osds[i];
2bd93d4d 2492 }
6f3bfd45
ID		 2493 set->size -= removed;
2494 if (set->size > 0)
2495 set->primary = set->osds[0];
2bd93d4d 2496 } else {
6f3bfd45
ID		 2497 /* set down/dne devices to NONE */
2498 for (i = set->size - 1; i >= 0; i--) {
2499 if (ceph_osd_is_down(osdmap, set->osds[i]))
2500 set->osds[i] = CRUSH_ITEM_NONE;
2bd93d4d 2501 else
6f3bfd45 2502 set->primary = set->osds[i];
2bd93d4d
ID		 2503 }
2504 }
2bd93d4d
ID		 2505}
2506
6f3bfd45
ID		 2507static void apply_primary_affinity(struct ceph_osdmap *osdmap,
2508 struct ceph_pg_pool_info *pi,
2509 u32 pps,
2510 struct ceph_osds *up)
47ec1f3c
ID		 2511{
2512 int i;
2513 int pos = -1;
2514
2515 /*
2516 * Do we have any non-default primary_affinity values for these
2517 * osds?
2518 */
2519 if (!osdmap->osd_primary_affinity)
2520 return;
2521
6f3bfd45
ID		 2522 for (i = 0; i < up->size; i++) {
2523 int osd = up->osds[i];
92b2e751
ID		 2524
2525 if (osd != CRUSH_ITEM_NONE &&
2526 osdmap->osd_primary_affinity[osd] !=
47ec1f3c
ID		 2527 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
2528 break;
2529 }
2530 }
6f3bfd45 2531 if (i == up->size)
47ec1f3c
ID		 2532 return;
2533
2534 /*
2535 * Pick the primary. Feed both the seed (for the pg) and the
2536 * osd into the hash/rng so that a proportional fraction of an
2537 * osd's pgs get rejected as primary.
2538 */
6f3bfd45
ID		 2539 for (i = 0; i < up->size; i++) {
2540 int osd = up->osds[i];
47ec1f3c
ID		 2541 u32 aff;
2542
47ec1f3c
ID		 2543 if (osd == CRUSH_ITEM_NONE)
2544 continue;
2545
2546 aff = osdmap->osd_primary_affinity[osd];
2547 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
2548 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
2549 pps, osd) >> 16) >= aff) {
2550 /*
2551 * We chose not to use this primary. Note it
2552 * anyway as a fallback in case we don't pick
2553 * anyone else, but keep looking.
2554 */
2555 if (pos < 0)
2556 pos = i;
2557 } else {
2558 pos = i;
2559 break;
2560 }
2561 }
2562 if (pos < 0)
2563 return;
2564
6f3bfd45 2565 up->primary = up->osds[pos];
47ec1f3c 2566
6f3bfd45 2567 if (ceph_can_shift_osds(pi) && pos > 0) {
47ec1f3c
ID		 2568 /* move the new primary to the front */
2569 for (i = pos; i > 0; i--)
6f3bfd45
ID		 2570 up->osds[i] = up->osds[i - 1];
2571 up->osds[0] = up->primary;
47ec1f3c
ID		 2572 }
2573}
2574
45966c34 2575/*
6f3bfd45 2576 * Get pg_temp and primary_temp mappings for given PG.
45966c34 2577 *
6f3bfd45
ID		 2578 * Note that a PG may have none, only pg_temp, only primary_temp or
2579 * both pg_temp and primary_temp mappings. This means @temp isn't
2580 * always a valid OSD set on return: in the "only primary_temp" case,
2581 * @temp will have its ->primary >= 0 but ->size == 0.
45966c34 2582 */
6f3bfd45
ID		 2583static void get_temp_osds(struct ceph_osdmap *osdmap,
2584 struct ceph_pg_pool_info *pi,
463bb8da 2585 const struct ceph_pg *pgid,
6f3bfd45 2586 struct ceph_osds *temp)
45966c34
ID		 2587{
2588 struct ceph_pg_mapping *pg;
45966c34
ID		 2589 int i;
2590
6f3bfd45 2591 ceph_osds_init(temp);
45966c34
ID		 2592
2593 /* pg_temp? */
463bb8da 2594 pg = lookup_pg_mapping(&osdmap->pg_temp, pgid);
45966c34 2595 if (pg) {
45966c34
ID		 2596 for (i = 0; i < pg->pg_temp.len; i++) {
2597 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
6f3bfd45 2598 if (ceph_can_shift_osds(pi))
45966c34 2599 continue;
6f3bfd45
ID		 2600
2601 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
45966c34 2602 } else {
6f3bfd45 2603 temp->osds[temp->size++] = pg->pg_temp.osds[i];
45966c34
ID		 2604 }
2605 }
2606
2607 /* apply pg_temp's primary */
6f3bfd45
ID		 2608 for (i = 0; i < temp->size; i++) {
2609 if (temp->osds[i] != CRUSH_ITEM_NONE) {
2610 temp->primary = temp->osds[i];
45966c34
ID		 2611 break;
2612 }
2613 }
45966c34
ID		 2614 }
2615
5e8d4d36 2616 /* primary_temp? */
463bb8da 2617 pg = lookup_pg_mapping(&osdmap->primary_temp, pgid);
5e8d4d36 2618 if (pg)
6f3bfd45 2619 temp->primary = pg->primary_temp.osd;
45966c34
ID		 2620}
2621
d85b7056 2622/*
6f3bfd45 2623 * Map a PG to its acting set as well as its up set.
ac972230 2624 *
6f3bfd45
ID		 2625 * Acting set is used for data mapping purposes, while up set can be
2626 * recorded for detecting interval changes and deciding whether to
2627 * resend a request.
d85b7056 2628 */
6f3bfd45 2629void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
df28152d 2630 struct ceph_pg_pool_info *pi,
6f3bfd45
ID		 2631 const struct ceph_pg *raw_pgid,
2632 struct ceph_osds *up,
2633 struct ceph_osds *acting)
d85b7056 2634{
463bb8da 2635 struct ceph_pg pgid;
ac972230 2636 u32 pps;
d85b7056 2637
df28152d 2638 WARN_ON(pi->id != raw_pgid->pool);
463bb8da 2639 raw_pg_to_pg(pi, raw_pgid, &pgid);
d85b7056 2640
6f3bfd45 2641 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
1c2e7b45 2642 apply_upmap(osdmap, &pgid, up);
6f3bfd45
ID		 2643 raw_to_up_osds(osdmap, pi, up);
2644 apply_primary_affinity(osdmap, pi, pps, up);
463bb8da 2645 get_temp_osds(osdmap, pi, &pgid, acting);
6f3bfd45
ID		 2646 if (!acting->size) {
2647 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
2648 acting->size = up->size;
2649 if (acting->primary == -1)
2650 acting->primary = up->primary;
8008ab10 2651 }
6f3bfd45 2652 WARN_ON(!osds_valid(up) || !osds_valid(acting));
d85b7056
SW		 2653}
2654
dc98ff72 2655bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
df28152d 2656 struct ceph_pg_pool_info *pi,
dc98ff72
ID		 2657 const struct ceph_pg *raw_pgid,
2658 struct ceph_spg *spgid)
2659{
dc98ff72
ID		 2660 struct ceph_pg pgid;
2661 struct ceph_osds up, acting;
2662 int i;
2663
df28152d 2664 WARN_ON(pi->id != raw_pgid->pool);
dc98ff72
ID		 2665 raw_pg_to_pg(pi, raw_pgid, &pgid);
2666
2667 if (ceph_can_shift_osds(pi)) {
2668 spgid->pgid = pgid; /* struct */
2669 spgid->shard = CEPH_SPG_NOSHARD;
2670 return true;
2671 }
2672
df28152d 2673 ceph_pg_to_up_acting_osds(osdmap, pi, &pgid, &up, &acting);
dc98ff72
ID		 2674 for (i = 0; i < acting.size; i++) {
2675 if (acting.osds[i] == acting.primary) {
2676 spgid->pgid = pgid; /* struct */
2677 spgid->shard = i;
2678 return true;
2679 }
2680 }
2681
2682 return false;
2683}
2684
f24e9980 2685/*
f81f1633 2686 * Return acting primary for given PG, or -1 if none.
f24e9980 2687 */
f81f1633
ID		 2688int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
2689 const struct ceph_pg *raw_pgid)
f24e9980 2690{
df28152d 2691 struct ceph_pg_pool_info *pi;
6f3bfd45 2692 struct ceph_osds up, acting;
f24e9980 2693
df28152d
ID		 2694 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
2695 if (!pi)
2696 return -1;
2697
2698 ceph_pg_to_up_acting_osds(osdmap, pi, raw_pgid, &up, &acting);
6f3bfd45 2699 return acting.primary;
f24e9980 2700}
f81f1633 2701EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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