2 #include <linux/ceph/ceph_debug.h>
4 #include <linux/module.h>
5 #include <linux/slab.h>
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>
14 char *ceph_osdmap_state_str(char *str, int len, int state)
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");
26 snprintf(str, len, "doesn't exist");
33 static int calc_bits_of(unsigned int t)
44 * the foo_mask is the smallest value 2^n-1 that is >= foo.
46 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
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;
55 static int crush_decode_uniform_bucket(void **p, void *end,
56 struct crush_bucket_uniform *b)
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);
66 static int crush_decode_list_bucket(void **p, void *end,
67 struct crush_bucket_list *b)
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)
74 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
75 if (b->sum_weights == NULL)
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);
87 static int crush_decode_tree_bucket(void **p, void *end,
88 struct crush_bucket_tree *b)
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)
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);
104 static int crush_decode_straw_bucket(void **p, void *end,
105 struct crush_bucket_straw *b)
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)
112 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
113 if (b->straws == NULL)
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);
125 static int crush_decode_straw2_bucket(void **p, void *end,
126 struct crush_bucket_straw2 *b)
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)
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);
141 static int skip_name_map(void **p, void *end)
144 ceph_decode_32_safe(p, end, len ,bad);
148 ceph_decode_32_safe(p, end, strlen, bad);
156 static struct crush_map *crush_decode(void *pbyval, void *end)
162 void *start = pbyval;
166 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
168 c = kzalloc(sizeof(*c), GFP_NOFS);
170 return ERR_PTR(-ENOMEM);
172 /* set tunables to default values */
173 c->choose_local_tries = 2;
174 c->choose_local_fallback_tries = 5;
175 c->choose_total_tries = 19;
176 c->chooseleaf_descend_once = 0;
178 ceph_decode_need(p, end, 4*sizeof(u32), bad);
179 magic = ceph_decode_32(p);
180 if (magic != CRUSH_MAGIC) {
181 pr_err("crush_decode magic %x != current %x\n",
182 (unsigned int)magic, (unsigned int)CRUSH_MAGIC);
185 c->max_buckets = ceph_decode_32(p);
186 c->max_rules = ceph_decode_32(p);
187 c->max_devices = ceph_decode_32(p);
189 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
190 if (c->buckets == NULL)
192 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
193 if (c->rules == NULL)
197 for (i = 0; i < c->max_buckets; i++) {
200 struct crush_bucket *b;
202 ceph_decode_32_safe(p, end, alg, bad);
204 c->buckets[i] = NULL;
207 dout("crush_decode bucket %d off %x %p to %p\n",
208 i, (int)(*p-start), *p, end);
211 case CRUSH_BUCKET_UNIFORM:
212 size = sizeof(struct crush_bucket_uniform);
214 case CRUSH_BUCKET_LIST:
215 size = sizeof(struct crush_bucket_list);
217 case CRUSH_BUCKET_TREE:
218 size = sizeof(struct crush_bucket_tree);
220 case CRUSH_BUCKET_STRAW:
221 size = sizeof(struct crush_bucket_straw);
223 case CRUSH_BUCKET_STRAW2:
224 size = sizeof(struct crush_bucket_straw2);
231 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
235 ceph_decode_need(p, end, 4*sizeof(u32), bad);
236 b->id = ceph_decode_32(p);
237 b->type = ceph_decode_16(p);
238 b->alg = ceph_decode_8(p);
239 b->hash = ceph_decode_8(p);
240 b->weight = ceph_decode_32(p);
241 b->size = ceph_decode_32(p);
243 dout("crush_decode bucket size %d off %x %p to %p\n",
244 b->size, (int)(*p-start), *p, end);
246 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
247 if (b->items == NULL)
249 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
254 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
255 for (j = 0; j < b->size; j++)
256 b->items[j] = ceph_decode_32(p);
259 case CRUSH_BUCKET_UNIFORM:
260 err = crush_decode_uniform_bucket(p, end,
261 (struct crush_bucket_uniform *)b);
265 case CRUSH_BUCKET_LIST:
266 err = crush_decode_list_bucket(p, end,
267 (struct crush_bucket_list *)b);
271 case CRUSH_BUCKET_TREE:
272 err = crush_decode_tree_bucket(p, end,
273 (struct crush_bucket_tree *)b);
277 case CRUSH_BUCKET_STRAW:
278 err = crush_decode_straw_bucket(p, end,
279 (struct crush_bucket_straw *)b);
283 case CRUSH_BUCKET_STRAW2:
284 err = crush_decode_straw2_bucket(p, end,
285 (struct crush_bucket_straw2 *)b);
293 dout("rule vec is %p\n", c->rules);
294 for (i = 0; i < c->max_rules; i++) {
296 struct crush_rule *r;
298 ceph_decode_32_safe(p, end, yes, bad);
300 dout("crush_decode NO rule %d off %x %p to %p\n",
301 i, (int)(*p-start), *p, end);
306 dout("crush_decode rule %d off %x %p to %p\n",
307 i, (int)(*p-start), *p, end);
310 ceph_decode_32_safe(p, end, yes, bad);
311 #if BITS_PER_LONG == 32
313 if (yes > (ULONG_MAX - sizeof(*r))
314 / sizeof(struct crush_rule_step))
317 r = c->rules[i] = kmalloc(sizeof(*r) +
318 yes*sizeof(struct crush_rule_step),
322 dout(" rule %d is at %p\n", i, r);
324 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
325 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
326 for (j = 0; j < r->len; j++) {
327 r->steps[j].op = ceph_decode_32(p);
328 r->steps[j].arg1 = ceph_decode_32(p);
329 r->steps[j].arg2 = ceph_decode_32(p);
333 /* ignore trailing name maps. */
334 for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) {
335 err = skip_name_map(p, end);
341 ceph_decode_need(p, end, 3*sizeof(u32), done);
342 c->choose_local_tries = ceph_decode_32(p);
343 c->choose_local_fallback_tries = ceph_decode_32(p);
344 c->choose_total_tries = ceph_decode_32(p);
345 dout("crush decode tunable choose_local_tries = %d\n",
346 c->choose_local_tries);
347 dout("crush decode tunable choose_local_fallback_tries = %d\n",
348 c->choose_local_fallback_tries);
349 dout("crush decode tunable choose_total_tries = %d\n",
350 c->choose_total_tries);
352 ceph_decode_need(p, end, sizeof(u32), done);
353 c->chooseleaf_descend_once = ceph_decode_32(p);
354 dout("crush decode tunable chooseleaf_descend_once = %d\n",
355 c->chooseleaf_descend_once);
357 ceph_decode_need(p, end, sizeof(u8), done);
358 c->chooseleaf_vary_r = ceph_decode_8(p);
359 dout("crush decode tunable chooseleaf_vary_r = %d\n",
360 c->chooseleaf_vary_r);
362 /* skip straw_calc_version, allowed_bucket_algs */
363 ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
364 *p += sizeof(u8) + sizeof(u32);
366 ceph_decode_need(p, end, sizeof(u8), done);
367 c->chooseleaf_stable = ceph_decode_8(p);
368 dout("crush decode tunable chooseleaf_stable = %d\n",
369 c->chooseleaf_stable);
372 dout("crush_decode success\n");
378 dout("crush_decode fail %d\n", err);
383 int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
385 if (lhs->pool < rhs->pool)
387 if (lhs->pool > rhs->pool)
389 if (lhs->seed < rhs->seed)
391 if (lhs->seed > rhs->seed)
398 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
399 * to a set of osds) and primary_temp (explicit primary setting)
401 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
402 struct rb_root *root)
404 struct rb_node **p = &root->rb_node;
405 struct rb_node *parent = NULL;
406 struct ceph_pg_mapping *pg = NULL;
409 dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new);
412 pg = rb_entry(parent, struct ceph_pg_mapping, node);
413 c = ceph_pg_compare(&new->pgid, &pg->pgid);
422 rb_link_node(&new->node, parent, p);
423 rb_insert_color(&new->node, root);
427 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
430 struct rb_node *n = root->rb_node;
431 struct ceph_pg_mapping *pg;
435 pg = rb_entry(n, struct ceph_pg_mapping, node);
436 c = ceph_pg_compare(&pgid, &pg->pgid);
442 dout("__lookup_pg_mapping %lld.%x got %p\n",
443 pgid.pool, pgid.seed, pg);
450 static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid)
452 struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid);
455 dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed,
457 rb_erase(&pg->node, root);
461 dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed);
466 * rbtree of pg pool info
468 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
470 struct rb_node **p = &root->rb_node;
471 struct rb_node *parent = NULL;
472 struct ceph_pg_pool_info *pi = NULL;
476 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
477 if (new->id < pi->id)
479 else if (new->id > pi->id)
485 rb_link_node(&new->node, parent, p);
486 rb_insert_color(&new->node, root);
490 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
492 struct ceph_pg_pool_info *pi;
493 struct rb_node *n = root->rb_node;
496 pi = rb_entry(n, struct ceph_pg_pool_info, node);
499 else if (id > pi->id)
507 struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
509 return __lookup_pg_pool(&map->pg_pools, id);
512 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
514 struct ceph_pg_pool_info *pi;
516 if (id == CEPH_NOPOOL)
519 if (WARN_ON_ONCE(id > (u64) INT_MAX))
522 pi = __lookup_pg_pool(&map->pg_pools, (int) id);
524 return pi ? pi->name : NULL;
526 EXPORT_SYMBOL(ceph_pg_pool_name_by_id);
528 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
532 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
533 struct ceph_pg_pool_info *pi =
534 rb_entry(rbp, struct ceph_pg_pool_info, node);
535 if (pi->name && strcmp(pi->name, name) == 0)
540 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
542 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
544 rb_erase(&pi->node, root);
549 static int decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
555 ceph_decode_need(p, end, 2 + 4, bad);
556 ev = ceph_decode_8(p); /* encoding version */
557 cv = ceph_decode_8(p); /* compat version */
559 pr_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
563 pr_warn("got v %d cv %d > 9 of ceph_pg_pool\n", ev, cv);
566 len = ceph_decode_32(p);
567 ceph_decode_need(p, end, len, bad);
570 pi->type = ceph_decode_8(p);
571 pi->size = ceph_decode_8(p);
572 pi->crush_ruleset = ceph_decode_8(p);
573 pi->object_hash = ceph_decode_8(p);
575 pi->pg_num = ceph_decode_32(p);
576 pi->pgp_num = ceph_decode_32(p);
578 *p += 4 + 4; /* skip lpg* */
579 *p += 4; /* skip last_change */
580 *p += 8 + 4; /* skip snap_seq, snap_epoch */
583 num = ceph_decode_32(p);
585 *p += 8; /* snapid key */
586 *p += 1 + 1; /* versions */
587 len = ceph_decode_32(p);
591 /* skip removed_snaps */
592 num = ceph_decode_32(p);
595 *p += 8; /* skip auid */
596 pi->flags = ceph_decode_64(p);
597 *p += 4; /* skip crash_replay_interval */
600 pi->min_size = ceph_decode_8(p);
602 pi->min_size = pi->size - pi->size / 2;
605 *p += 8 + 8; /* skip quota_max_* */
609 num = ceph_decode_32(p);
612 *p += 8; /* skip tier_of */
613 *p += 1; /* skip cache_mode */
615 pi->read_tier = ceph_decode_64(p);
616 pi->write_tier = ceph_decode_64(p);
623 /* skip properties */
624 num = ceph_decode_32(p);
626 len = ceph_decode_32(p);
628 len = ceph_decode_32(p);
634 /* skip hit_set_params */
635 *p += 1 + 1; /* versions */
636 len = ceph_decode_32(p);
639 *p += 4; /* skip hit_set_period */
640 *p += 4; /* skip hit_set_count */
644 *p += 4; /* skip stripe_width */
647 *p += 8; /* skip target_max_bytes */
648 *p += 8; /* skip target_max_objects */
649 *p += 4; /* skip cache_target_dirty_ratio_micro */
650 *p += 4; /* skip cache_target_full_ratio_micro */
651 *p += 4; /* skip cache_min_flush_age */
652 *p += 4; /* skip cache_min_evict_age */
656 /* skip erasure_code_profile */
657 len = ceph_decode_32(p);
662 pi->last_force_request_resend = ceph_decode_32(p);
664 pi->last_force_request_resend = 0;
666 /* ignore the rest */
676 static int decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
678 struct ceph_pg_pool_info *pi;
682 ceph_decode_32_safe(p, end, num, bad);
683 dout(" %d pool names\n", num);
685 ceph_decode_64_safe(p, end, pool, bad);
686 ceph_decode_32_safe(p, end, len, bad);
687 dout(" pool %llu len %d\n", pool, len);
688 ceph_decode_need(p, end, len, bad);
689 pi = __lookup_pg_pool(&map->pg_pools, pool);
691 char *name = kstrndup(*p, len, GFP_NOFS);
697 dout(" name is %s\n", pi->name);
710 struct ceph_osdmap *ceph_osdmap_alloc(void)
712 struct ceph_osdmap *map;
714 map = kzalloc(sizeof(*map), GFP_NOIO);
718 map->pg_pools = RB_ROOT;
720 map->pg_temp = RB_ROOT;
721 map->primary_temp = RB_ROOT;
722 mutex_init(&map->crush_scratch_mutex);
727 void ceph_osdmap_destroy(struct ceph_osdmap *map)
729 dout("osdmap_destroy %p\n", map);
731 crush_destroy(map->crush);
732 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
733 struct ceph_pg_mapping *pg =
734 rb_entry(rb_first(&map->pg_temp),
735 struct ceph_pg_mapping, node);
736 rb_erase(&pg->node, &map->pg_temp);
739 while (!RB_EMPTY_ROOT(&map->primary_temp)) {
740 struct ceph_pg_mapping *pg =
741 rb_entry(rb_first(&map->primary_temp),
742 struct ceph_pg_mapping, node);
743 rb_erase(&pg->node, &map->primary_temp);
746 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
747 struct ceph_pg_pool_info *pi =
748 rb_entry(rb_first(&map->pg_pools),
749 struct ceph_pg_pool_info, node);
750 __remove_pg_pool(&map->pg_pools, pi);
752 kfree(map->osd_state);
753 kfree(map->osd_weight);
754 kfree(map->osd_addr);
755 kfree(map->osd_primary_affinity);
760 * Adjust max_osd value, (re)allocate arrays.
762 * The new elements are properly initialized.
764 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
768 struct ceph_entity_addr *addr;
771 state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
774 map->osd_state = state;
776 weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
779 map->osd_weight = weight;
781 addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
784 map->osd_addr = addr;
786 for (i = map->max_osd; i < max; i++) {
787 map->osd_state[i] = 0;
788 map->osd_weight[i] = CEPH_OSD_OUT;
789 memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
792 if (map->osd_primary_affinity) {
795 affinity = krealloc(map->osd_primary_affinity,
796 max*sizeof(*affinity), GFP_NOFS);
799 map->osd_primary_affinity = affinity;
801 for (i = map->max_osd; i < max; i++)
802 map->osd_primary_affinity[i] =
803 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
811 #define OSDMAP_WRAPPER_COMPAT_VER 7
812 #define OSDMAP_CLIENT_DATA_COMPAT_VER 1
815 * Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
816 * to struct_v of the client_data section for new (v7 and above)
819 static int get_osdmap_client_data_v(void **p, void *end,
820 const char *prefix, u8 *v)
824 ceph_decode_8_safe(p, end, struct_v, e_inval);
828 ceph_decode_8_safe(p, end, struct_compat, e_inval);
829 if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
830 pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
831 struct_v, struct_compat,
832 OSDMAP_WRAPPER_COMPAT_VER, prefix);
835 *p += 4; /* ignore wrapper struct_len */
837 ceph_decode_8_safe(p, end, struct_v, e_inval);
838 ceph_decode_8_safe(p, end, struct_compat, e_inval);
839 if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
840 pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
841 struct_v, struct_compat,
842 OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
845 *p += 4; /* ignore client data struct_len */
850 ceph_decode_16_safe(p, end, version, e_inval);
852 pr_warn("got v %d < 6 of %s ceph_osdmap\n",
857 /* old osdmap enconding */
868 static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
873 ceph_decode_32_safe(p, end, n, e_inval);
875 struct ceph_pg_pool_info *pi;
879 ceph_decode_64_safe(p, end, pool, e_inval);
881 pi = __lookup_pg_pool(&map->pg_pools, pool);
882 if (!incremental || !pi) {
883 pi = kzalloc(sizeof(*pi), GFP_NOFS);
889 ret = __insert_pg_pool(&map->pg_pools, pi);
896 ret = decode_pool(p, end, pi);
907 static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
909 return __decode_pools(p, end, map, false);
912 static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
914 return __decode_pools(p, end, map, true);
917 static int __decode_pg_temp(void **p, void *end, struct ceph_osdmap *map,
922 ceph_decode_32_safe(p, end, n, e_inval);
928 ret = ceph_decode_pgid(p, end, &pgid);
932 ceph_decode_32_safe(p, end, len, e_inval);
934 ret = __remove_pg_mapping(&map->pg_temp, pgid);
935 BUG_ON(!incremental && ret != -ENOENT);
937 if (!incremental || len > 0) {
938 struct ceph_pg_mapping *pg;
940 ceph_decode_need(p, end, len*sizeof(u32), e_inval);
942 if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
945 pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
950 pg->pg_temp.len = len;
951 for (i = 0; i < len; i++)
952 pg->pg_temp.osds[i] = ceph_decode_32(p);
954 ret = __insert_pg_mapping(pg, &map->pg_temp);
968 static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
970 return __decode_pg_temp(p, end, map, false);
973 static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
975 return __decode_pg_temp(p, end, map, true);
978 static int __decode_primary_temp(void **p, void *end, struct ceph_osdmap *map,
983 ceph_decode_32_safe(p, end, n, e_inval);
989 ret = ceph_decode_pgid(p, end, &pgid);
993 ceph_decode_32_safe(p, end, osd, e_inval);
995 ret = __remove_pg_mapping(&map->primary_temp, pgid);
996 BUG_ON(!incremental && ret != -ENOENT);
998 if (!incremental || osd != (u32)-1) {
999 struct ceph_pg_mapping *pg;
1001 pg = kzalloc(sizeof(*pg), GFP_NOFS);
1006 pg->primary_temp.osd = osd;
1008 ret = __insert_pg_mapping(pg, &map->primary_temp);
1022 static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
1024 return __decode_primary_temp(p, end, map, false);
1027 static int decode_new_primary_temp(void **p, void *end,
1028 struct ceph_osdmap *map)
1030 return __decode_primary_temp(p, end, map, true);
1033 u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
1035 BUG_ON(osd >= map->max_osd);
1037 if (!map->osd_primary_affinity)
1038 return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1040 return map->osd_primary_affinity[osd];
1043 static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
1045 BUG_ON(osd >= map->max_osd);
1047 if (!map->osd_primary_affinity) {
1050 map->osd_primary_affinity = kmalloc(map->max_osd*sizeof(u32),
1052 if (!map->osd_primary_affinity)
1055 for (i = 0; i < map->max_osd; i++)
1056 map->osd_primary_affinity[i] =
1057 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
1060 map->osd_primary_affinity[osd] = aff;
1065 static int decode_primary_affinity(void **p, void *end,
1066 struct ceph_osdmap *map)
1070 ceph_decode_32_safe(p, end, len, e_inval);
1072 kfree(map->osd_primary_affinity);
1073 map->osd_primary_affinity = NULL;
1076 if (len != map->max_osd)
1079 ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
1081 for (i = 0; i < map->max_osd; i++) {
1084 ret = set_primary_affinity(map, i, ceph_decode_32(p));
1095 static int decode_new_primary_affinity(void **p, void *end,
1096 struct ceph_osdmap *map)
1100 ceph_decode_32_safe(p, end, n, e_inval);
1105 ceph_decode_32_safe(p, end, osd, e_inval);
1106 ceph_decode_32_safe(p, end, aff, e_inval);
1108 ret = set_primary_affinity(map, osd, aff);
1112 pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
1122 * decode a full map.
1124 static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
1133 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1135 err = get_osdmap_client_data_v(p, end, "full", &struct_v);
1139 /* fsid, epoch, created, modified */
1140 ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
1141 sizeof(map->created) + sizeof(map->modified), e_inval);
1142 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
1143 epoch = map->epoch = ceph_decode_32(p);
1144 ceph_decode_copy(p, &map->created, sizeof(map->created));
1145 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
1148 err = decode_pools(p, end, map);
1153 err = decode_pool_names(p, end, map);
1157 ceph_decode_32_safe(p, end, map->pool_max, e_inval);
1159 ceph_decode_32_safe(p, end, map->flags, e_inval);
1162 ceph_decode_32_safe(p, end, max, e_inval);
1164 /* (re)alloc osd arrays */
1165 err = osdmap_set_max_osd(map, max);
1169 /* osd_state, osd_weight, osd_addrs->client_addr */
1170 ceph_decode_need(p, end, 3*sizeof(u32) +
1171 map->max_osd*(1 + sizeof(*map->osd_weight) +
1172 sizeof(*map->osd_addr)), e_inval);
1174 if (ceph_decode_32(p) != map->max_osd)
1177 ceph_decode_copy(p, map->osd_state, map->max_osd);
1179 if (ceph_decode_32(p) != map->max_osd)
1182 for (i = 0; i < map->max_osd; i++)
1183 map->osd_weight[i] = ceph_decode_32(p);
1185 if (ceph_decode_32(p) != map->max_osd)
1188 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
1189 for (i = 0; i < map->max_osd; i++)
1190 ceph_decode_addr(&map->osd_addr[i]);
1193 err = decode_pg_temp(p, end, map);
1198 if (struct_v >= 1) {
1199 err = decode_primary_temp(p, end, map);
1204 /* primary_affinity */
1205 if (struct_v >= 2) {
1206 err = decode_primary_affinity(p, end, map);
1210 /* XXX can this happen? */
1211 kfree(map->osd_primary_affinity);
1212 map->osd_primary_affinity = NULL;
1216 ceph_decode_32_safe(p, end, len, e_inval);
1217 map->crush = crush_decode(*p, min(*p + len, end));
1218 if (IS_ERR(map->crush)) {
1219 err = PTR_ERR(map->crush);
1225 /* ignore the rest */
1228 dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1234 pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1235 err, epoch, (int)(*p - start), *p, start, end);
1236 print_hex_dump(KERN_DEBUG, "osdmap: ",
1237 DUMP_PREFIX_OFFSET, 16, 1,
1238 start, end - start, true);
1243 * Allocate and decode a full map.
1245 struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
1247 struct ceph_osdmap *map;
1250 map = ceph_osdmap_alloc();
1252 return ERR_PTR(-ENOMEM);
1254 ret = osdmap_decode(p, end, map);
1256 ceph_osdmap_destroy(map);
1257 return ERR_PTR(ret);
1264 * decode and apply an incremental map update.
1266 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
1267 struct ceph_osdmap *map)
1269 struct crush_map *newcrush = NULL;
1270 struct ceph_fsid fsid;
1272 struct ceph_timespec modified;
1276 __s32 new_flags, max;
1281 dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
1283 err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
1287 /* fsid, epoch, modified, new_pool_max, new_flags */
1288 ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
1289 sizeof(u64) + sizeof(u32), e_inval);
1290 ceph_decode_copy(p, &fsid, sizeof(fsid));
1291 epoch = ceph_decode_32(p);
1292 BUG_ON(epoch != map->epoch+1);
1293 ceph_decode_copy(p, &modified, sizeof(modified));
1294 new_pool_max = ceph_decode_64(p);
1295 new_flags = ceph_decode_32(p);
1298 ceph_decode_32_safe(p, end, len, e_inval);
1300 dout("apply_incremental full map len %d, %p to %p\n",
1302 return ceph_osdmap_decode(p, min(*p+len, end));
1306 ceph_decode_32_safe(p, end, len, e_inval);
1308 newcrush = crush_decode(*p, min(*p+len, end));
1309 if (IS_ERR(newcrush)) {
1310 err = PTR_ERR(newcrush);
1319 map->flags = new_flags;
1320 if (new_pool_max >= 0)
1321 map->pool_max = new_pool_max;
1324 ceph_decode_32_safe(p, end, max, e_inval);
1326 err = osdmap_set_max_osd(map, max);
1332 map->modified = modified;
1335 crush_destroy(map->crush);
1336 map->crush = newcrush;
1341 err = decode_new_pools(p, end, map);
1345 /* new_pool_names */
1346 err = decode_pool_names(p, end, map);
1351 ceph_decode_32_safe(p, end, len, e_inval);
1353 struct ceph_pg_pool_info *pi;
1355 ceph_decode_64_safe(p, end, pool, e_inval);
1356 pi = __lookup_pg_pool(&map->pg_pools, pool);
1358 __remove_pg_pool(&map->pg_pools, pi);
1362 ceph_decode_32_safe(p, end, len, e_inval);
1365 struct ceph_entity_addr addr;
1366 ceph_decode_32_safe(p, end, osd, e_inval);
1367 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), e_inval);
1368 ceph_decode_addr(&addr);
1369 pr_info("osd%d up\n", osd);
1370 BUG_ON(osd >= map->max_osd);
1371 map->osd_state[osd] |= CEPH_OSD_UP | CEPH_OSD_EXISTS;
1372 map->osd_addr[osd] = addr;
1376 ceph_decode_32_safe(p, end, len, e_inval);
1380 ceph_decode_32_safe(p, end, osd, e_inval);
1381 xorstate = **(u8 **)p;
1382 (*p)++; /* clean flag */
1384 xorstate = CEPH_OSD_UP;
1385 if (xorstate & CEPH_OSD_UP)
1386 pr_info("osd%d down\n", osd);
1387 if (osd < map->max_osd)
1388 map->osd_state[osd] ^= xorstate;
1392 ceph_decode_32_safe(p, end, len, e_inval);
1395 ceph_decode_need(p, end, sizeof(u32)*2, e_inval);
1396 osd = ceph_decode_32(p);
1397 off = ceph_decode_32(p);
1398 pr_info("osd%d weight 0x%x %s\n", osd, off,
1399 off == CEPH_OSD_IN ? "(in)" :
1400 (off == CEPH_OSD_OUT ? "(out)" : ""));
1401 if (osd < map->max_osd)
1402 map->osd_weight[osd] = off;
1406 err = decode_new_pg_temp(p, end, map);
1410 /* new_primary_temp */
1411 if (struct_v >= 1) {
1412 err = decode_new_primary_temp(p, end, map);
1417 /* new_primary_affinity */
1418 if (struct_v >= 2) {
1419 err = decode_new_primary_affinity(p, end, map);
1424 /* ignore the rest */
1427 dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
1433 pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
1434 err, epoch, (int)(*p - start), *p, start, end);
1435 print_hex_dump(KERN_DEBUG, "osdmap: ",
1436 DUMP_PREFIX_OFFSET, 16, 1,
1437 start, end - start, true);
1439 crush_destroy(newcrush);
1440 return ERR_PTR(err);
1443 void ceph_oid_copy(struct ceph_object_id *dest,
1444 const struct ceph_object_id *src)
1446 WARN_ON(!ceph_oid_empty(dest));
1448 if (src->name != src->inline_name) {
1449 /* very rare, see ceph_object_id definition */
1450 dest->name = kmalloc(src->name_len + 1,
1451 GFP_NOIO | __GFP_NOFAIL);
1454 memcpy(dest->name, src->name, src->name_len + 1);
1455 dest->name_len = src->name_len;
1457 EXPORT_SYMBOL(ceph_oid_copy);
1459 static __printf(2, 0)
1460 int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
1464 WARN_ON(!ceph_oid_empty(oid));
1466 len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
1467 if (len >= sizeof(oid->inline_name))
1470 oid->name_len = len;
1475 * If oid doesn't fit into inline buffer, BUG.
1477 void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
1482 BUG_ON(oid_printf_vargs(oid, fmt, ap));
1485 EXPORT_SYMBOL(ceph_oid_printf);
1487 static __printf(3, 0)
1488 int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
1489 const char *fmt, va_list ap)
1495 len = oid_printf_vargs(oid, fmt, aq);
1499 char *external_name;
1501 external_name = kmalloc(len + 1, gfp);
1505 oid->name = external_name;
1506 WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
1507 oid->name_len = len;
1514 * If oid doesn't fit into inline buffer, allocate.
1516 int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
1517 const char *fmt, ...)
1523 ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
1528 EXPORT_SYMBOL(ceph_oid_aprintf);
1530 void ceph_oid_destroy(struct ceph_object_id *oid)
1532 if (oid->name != oid->inline_name)
1535 EXPORT_SYMBOL(ceph_oid_destroy);
1540 static bool __osds_equal(const struct ceph_osds *lhs,
1541 const struct ceph_osds *rhs)
1543 if (lhs->size == rhs->size &&
1544 !memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
1553 static bool osds_equal(const struct ceph_osds *lhs,
1554 const struct ceph_osds *rhs)
1556 if (__osds_equal(lhs, rhs) &&
1557 lhs->primary == rhs->primary)
1563 static bool osds_valid(const struct ceph_osds *set)
1566 if (set->size > 0 && set->primary >= 0)
1569 /* empty can_shift_osds set */
1570 if (!set->size && set->primary == -1)
1573 /* empty !can_shift_osds set - all NONE */
1574 if (set->size > 0 && set->primary == -1) {
1577 for (i = 0; i < set->size; i++) {
1578 if (set->osds[i] != CRUSH_ITEM_NONE)
1588 void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
1590 memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
1591 dest->size = src->size;
1592 dest->primary = src->primary;
1595 static bool is_split(const struct ceph_pg *pgid,
1599 int old_bits = calc_bits_of(old_pg_num);
1600 int old_mask = (1 << old_bits) - 1;
1603 WARN_ON(pgid->seed >= old_pg_num);
1604 if (new_pg_num <= old_pg_num)
1607 for (n = 1; ; n++) {
1608 int next_bit = n << (old_bits - 1);
1609 u32 s = next_bit | pgid->seed;
1611 if (s < old_pg_num || s == pgid->seed)
1613 if (s >= new_pg_num)
1616 s = ceph_stable_mod(s, old_pg_num, old_mask);
1617 if (s == pgid->seed)
1624 bool ceph_is_new_interval(const struct ceph_osds *old_acting,
1625 const struct ceph_osds *new_acting,
1626 const struct ceph_osds *old_up,
1627 const struct ceph_osds *new_up,
1634 bool old_sort_bitwise,
1635 bool new_sort_bitwise,
1636 const struct ceph_pg *pgid)
1638 return !osds_equal(old_acting, new_acting) ||
1639 !osds_equal(old_up, new_up) ||
1640 old_size != new_size ||
1641 old_min_size != new_min_size ||
1642 is_split(pgid, old_pg_num, new_pg_num) ||
1643 old_sort_bitwise != new_sort_bitwise;
1646 static int calc_pg_rank(int osd, const struct ceph_osds *acting)
1650 for (i = 0; i < acting->size; i++) {
1651 if (acting->osds[i] == osd)
1658 static bool primary_changed(const struct ceph_osds *old_acting,
1659 const struct ceph_osds *new_acting)
1661 if (!old_acting->size && !new_acting->size)
1662 return false; /* both still empty */
1664 if (!old_acting->size ^ !new_acting->size)
1665 return true; /* was empty, now not, or vice versa */
1667 if (old_acting->primary != new_acting->primary)
1668 return true; /* primary changed */
1670 if (calc_pg_rank(old_acting->primary, old_acting) !=
1671 calc_pg_rank(new_acting->primary, new_acting))
1674 return false; /* same primary (tho replicas may have changed) */
1677 bool ceph_osds_changed(const struct ceph_osds *old_acting,
1678 const struct ceph_osds *new_acting,
1681 if (primary_changed(old_acting, new_acting))
1684 if (any_change && !__osds_equal(old_acting, new_acting))
1691 * calculate file layout from given offset, length.
1692 * fill in correct oid, logical length, and object extent
1695 * for now, we write only a single su, until we can
1696 * pass a stride back to the caller.
1698 int ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
1701 u64 *oxoff, u64 *oxlen)
1703 u32 osize = le32_to_cpu(layout->fl_object_size);
1704 u32 su = le32_to_cpu(layout->fl_stripe_unit);
1705 u32 sc = le32_to_cpu(layout->fl_stripe_count);
1706 u32 bl, stripeno, stripepos, objsetno;
1710 dout("mapping %llu~%llu osize %u fl_su %u\n", off, len,
1712 if (su == 0 || sc == 0)
1714 su_per_object = osize / su;
1715 if (su_per_object == 0)
1717 dout("osize %u / su %u = su_per_object %u\n", osize, su,
1720 if ((su & ~PAGE_MASK) != 0)
1723 /* bl = *off / su; */
1727 dout("off %llu / su %u = bl %u\n", off, su, bl);
1730 stripepos = bl % sc;
1731 objsetno = stripeno / su_per_object;
1733 *ono = objsetno * sc + stripepos;
1734 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono);
1736 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
1738 su_offset = do_div(t, su);
1739 *oxoff = su_offset + (stripeno % su_per_object) * su;
1742 * Calculate the length of the extent being written to the selected
1743 * object. This is the minimum of the full length requested (len) or
1744 * the remainder of the current stripe being written to.
1746 *oxlen = min_t(u64, len, su - su_offset);
1748 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
1752 dout(" invalid layout\n");
1758 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
1761 * Map an object into a PG.
1763 * Should only be called with target_oid and target_oloc (as opposed to
1764 * base_oid and base_oloc), since tiering isn't taken into account.
1766 int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
1767 struct ceph_object_id *oid,
1768 struct ceph_object_locator *oloc,
1769 struct ceph_pg *raw_pgid)
1771 struct ceph_pg_pool_info *pi;
1773 pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
1777 raw_pgid->pool = oloc->pool;
1778 raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
1781 dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
1782 raw_pgid->pool, raw_pgid->seed);
1785 EXPORT_SYMBOL(ceph_object_locator_to_pg);
1788 * Map a raw PG (full precision ps) into an actual PG.
1790 static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
1791 const struct ceph_pg *raw_pgid,
1792 struct ceph_pg *pgid)
1794 pgid->pool = raw_pgid->pool;
1795 pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
1800 * Map a raw PG (full precision ps) into a placement ps (placement
1801 * seed). Include pool id in that value so that different pools don't
1802 * use the same seeds.
1804 static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
1805 const struct ceph_pg *raw_pgid)
1807 if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
1808 /* hash pool id and seed so that pool PGs do not overlap */
1809 return crush_hash32_2(CRUSH_HASH_RJENKINS1,
1810 ceph_stable_mod(raw_pgid->seed,
1816 * legacy behavior: add ps and pool together. this is
1817 * not a great approach because the PGs from each pool
1818 * will overlap on top of each other: 0.5 == 1.4 ==
1821 return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
1823 (unsigned)raw_pgid->pool;
1827 static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
1828 int *result, int result_max,
1829 const __u32 *weight, int weight_max)
1833 BUG_ON(result_max > CEPH_PG_MAX_SIZE);
1835 mutex_lock(&map->crush_scratch_mutex);
1836 r = crush_do_rule(map->crush, ruleno, x, result, result_max,
1837 weight, weight_max, map->crush_scratch_ary);
1838 mutex_unlock(&map->crush_scratch_mutex);
1844 * Calculate raw set (CRUSH output) for given PG. The result may
1845 * contain nonexistent OSDs. ->primary is undefined for a raw set.
1847 * Placement seed (CRUSH input) is returned through @ppps.
1849 static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
1850 struct ceph_pg_pool_info *pi,
1851 const struct ceph_pg *raw_pgid,
1852 struct ceph_osds *raw,
1855 u32 pps = raw_pg_to_pps(pi, raw_pgid);
1859 ceph_osds_init(raw);
1863 ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
1866 pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
1867 pi->id, pi->crush_ruleset, pi->type, pi->size);
1871 len = do_crush(osdmap, ruleno, pps, raw->osds,
1872 min_t(int, pi->size, ARRAY_SIZE(raw->osds)),
1873 osdmap->osd_weight, osdmap->max_osd);
1875 pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
1876 len, ruleno, pi->id, pi->crush_ruleset, pi->type,
1885 * Given raw set, calculate up set and up primary. By definition of an
1886 * up set, the result won't contain nonexistent or down OSDs.
1888 * This is done in-place - on return @set is the up set. If it's
1889 * empty, ->primary will remain undefined.
1891 static void raw_to_up_osds(struct ceph_osdmap *osdmap,
1892 struct ceph_pg_pool_info *pi,
1893 struct ceph_osds *set)
1897 /* ->primary is undefined for a raw set */
1898 BUG_ON(set->primary != -1);
1900 if (ceph_can_shift_osds(pi)) {
1904 for (i = 0; i < set->size; i++) {
1905 if (ceph_osd_is_down(osdmap, set->osds[i])) {
1910 set->osds[i - removed] = set->osds[i];
1912 set->size -= removed;
1914 set->primary = set->osds[0];
1916 /* set down/dne devices to NONE */
1917 for (i = set->size - 1; i >= 0; i--) {
1918 if (ceph_osd_is_down(osdmap, set->osds[i]))
1919 set->osds[i] = CRUSH_ITEM_NONE;
1921 set->primary = set->osds[i];
1926 static void apply_primary_affinity(struct ceph_osdmap *osdmap,
1927 struct ceph_pg_pool_info *pi,
1929 struct ceph_osds *up)
1935 * Do we have any non-default primary_affinity values for these
1938 if (!osdmap->osd_primary_affinity)
1941 for (i = 0; i < up->size; i++) {
1942 int osd = up->osds[i];
1944 if (osd != CRUSH_ITEM_NONE &&
1945 osdmap->osd_primary_affinity[osd] !=
1946 CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
1954 * Pick the primary. Feed both the seed (for the pg) and the
1955 * osd into the hash/rng so that a proportional fraction of an
1956 * osd's pgs get rejected as primary.
1958 for (i = 0; i < up->size; i++) {
1959 int osd = up->osds[i];
1962 if (osd == CRUSH_ITEM_NONE)
1965 aff = osdmap->osd_primary_affinity[osd];
1966 if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
1967 (crush_hash32_2(CRUSH_HASH_RJENKINS1,
1968 pps, osd) >> 16) >= aff) {
1970 * We chose not to use this primary. Note it
1971 * anyway as a fallback in case we don't pick
1972 * anyone else, but keep looking.
1984 up->primary = up->osds[pos];
1986 if (ceph_can_shift_osds(pi) && pos > 0) {
1987 /* move the new primary to the front */
1988 for (i = pos; i > 0; i--)
1989 up->osds[i] = up->osds[i - 1];
1990 up->osds[0] = up->primary;
1995 * Get pg_temp and primary_temp mappings for given PG.
1997 * Note that a PG may have none, only pg_temp, only primary_temp or
1998 * both pg_temp and primary_temp mappings. This means @temp isn't
1999 * always a valid OSD set on return: in the "only primary_temp" case,
2000 * @temp will have its ->primary >= 0 but ->size == 0.
2002 static void get_temp_osds(struct ceph_osdmap *osdmap,
2003 struct ceph_pg_pool_info *pi,
2004 const struct ceph_pg *raw_pgid,
2005 struct ceph_osds *temp)
2007 struct ceph_pg pgid;
2008 struct ceph_pg_mapping *pg;
2011 raw_pg_to_pg(pi, raw_pgid, &pgid);
2012 ceph_osds_init(temp);
2015 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
2017 for (i = 0; i < pg->pg_temp.len; i++) {
2018 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2019 if (ceph_can_shift_osds(pi))
2022 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
2024 temp->osds[temp->size++] = pg->pg_temp.osds[i];
2028 /* apply pg_temp's primary */
2029 for (i = 0; i < temp->size; i++) {
2030 if (temp->osds[i] != CRUSH_ITEM_NONE) {
2031 temp->primary = temp->osds[i];
2038 pg = __lookup_pg_mapping(&osdmap->primary_temp, pgid);
2040 temp->primary = pg->primary_temp.osd;
2044 * Map a PG to its acting set as well as its up set.
2046 * Acting set is used for data mapping purposes, while up set can be
2047 * recorded for detecting interval changes and deciding whether to
2050 void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
2051 const struct ceph_pg *raw_pgid,
2052 struct ceph_osds *up,
2053 struct ceph_osds *acting)
2055 struct ceph_pg_pool_info *pi;
2058 pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
2061 ceph_osds_init(acting);
2065 pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
2066 raw_to_up_osds(osdmap, pi, up);
2067 apply_primary_affinity(osdmap, pi, pps, up);
2068 get_temp_osds(osdmap, pi, raw_pgid, acting);
2069 if (!acting->size) {
2070 memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
2071 acting->size = up->size;
2072 if (acting->primary == -1)
2073 acting->primary = up->primary;
2076 WARN_ON(!osds_valid(up) || !osds_valid(acting));
2080 * Return acting primary for given PG, or -1 if none.
2082 int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
2083 const struct ceph_pg *raw_pgid)
2085 struct ceph_osds up, acting;
2087 ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
2088 return acting.primary;
2090 EXPORT_SYMBOL(ceph_pg_to_acting_primary);