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