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)
23 if (state & CEPH_OSD_EXISTS) {
24 snprintf(str, len, "exists");
27 if (state & CEPH_OSD_UP) {
28 snprintf(str, len, "%s%s%s", str, (flag ? ", " : ""),
33 snprintf(str, len, "doesn't exist");
41 static int calc_bits_of(unsigned t)
52 * the foo_mask is the smallest value 2^n-1 that is >= foo.
54 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
56 pi->pg_num_mask = (1 << calc_bits_of(le32_to_cpu(pi->v.pg_num)-1)) - 1;
58 (1 << calc_bits_of(le32_to_cpu(pi->v.pgp_num)-1)) - 1;
60 (1 << calc_bits_of(le32_to_cpu(pi->v.lpg_num)-1)) - 1;
62 (1 << calc_bits_of(le32_to_cpu(pi->v.lpgp_num)-1)) - 1;
68 static int crush_decode_uniform_bucket(void **p, void *end,
69 struct crush_bucket_uniform *b)
71 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
72 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
73 b->item_weight = ceph_decode_32(p);
79 static int crush_decode_list_bucket(void **p, void *end,
80 struct crush_bucket_list *b)
83 dout("crush_decode_list_bucket %p to %p\n", *p, end);
84 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
85 if (b->item_weights == NULL)
87 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
88 if (b->sum_weights == NULL)
90 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
91 for (j = 0; j < b->h.size; j++) {
92 b->item_weights[j] = ceph_decode_32(p);
93 b->sum_weights[j] = ceph_decode_32(p);
100 static int crush_decode_tree_bucket(void **p, void *end,
101 struct crush_bucket_tree *b)
104 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
105 ceph_decode_32_safe(p, end, b->num_nodes, bad);
106 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
107 if (b->node_weights == NULL)
109 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
110 for (j = 0; j < b->num_nodes; j++)
111 b->node_weights[j] = ceph_decode_32(p);
117 static int crush_decode_straw_bucket(void **p, void *end,
118 struct crush_bucket_straw *b)
121 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
122 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
123 if (b->item_weights == NULL)
125 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
126 if (b->straws == NULL)
128 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
129 for (j = 0; j < b->h.size; j++) {
130 b->item_weights[j] = ceph_decode_32(p);
131 b->straws[j] = ceph_decode_32(p);
138 static struct crush_map *crush_decode(void *pbyval, void *end)
144 void *start = pbyval;
147 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
149 c = kzalloc(sizeof(*c), GFP_NOFS);
151 return ERR_PTR(-ENOMEM);
153 ceph_decode_need(p, end, 4*sizeof(u32), bad);
154 magic = ceph_decode_32(p);
155 if (magic != CRUSH_MAGIC) {
156 pr_err("crush_decode magic %x != current %x\n",
157 (unsigned)magic, (unsigned)CRUSH_MAGIC);
160 c->max_buckets = ceph_decode_32(p);
161 c->max_rules = ceph_decode_32(p);
162 c->max_devices = ceph_decode_32(p);
164 c->device_parents = kcalloc(c->max_devices, sizeof(u32), GFP_NOFS);
165 if (c->device_parents == NULL)
167 c->bucket_parents = kcalloc(c->max_buckets, sizeof(u32), GFP_NOFS);
168 if (c->bucket_parents == NULL)
171 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
172 if (c->buckets == NULL)
174 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
175 if (c->rules == NULL)
179 for (i = 0; i < c->max_buckets; i++) {
182 struct crush_bucket *b;
184 ceph_decode_32_safe(p, end, alg, bad);
186 c->buckets[i] = NULL;
189 dout("crush_decode bucket %d off %x %p to %p\n",
190 i, (int)(*p-start), *p, end);
193 case CRUSH_BUCKET_UNIFORM:
194 size = sizeof(struct crush_bucket_uniform);
196 case CRUSH_BUCKET_LIST:
197 size = sizeof(struct crush_bucket_list);
199 case CRUSH_BUCKET_TREE:
200 size = sizeof(struct crush_bucket_tree);
202 case CRUSH_BUCKET_STRAW:
203 size = sizeof(struct crush_bucket_straw);
210 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
214 ceph_decode_need(p, end, 4*sizeof(u32), bad);
215 b->id = ceph_decode_32(p);
216 b->type = ceph_decode_16(p);
217 b->alg = ceph_decode_8(p);
218 b->hash = ceph_decode_8(p);
219 b->weight = ceph_decode_32(p);
220 b->size = ceph_decode_32(p);
222 dout("crush_decode bucket size %d off %x %p to %p\n",
223 b->size, (int)(*p-start), *p, end);
225 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
226 if (b->items == NULL)
228 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
233 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
234 for (j = 0; j < b->size; j++)
235 b->items[j] = ceph_decode_32(p);
238 case CRUSH_BUCKET_UNIFORM:
239 err = crush_decode_uniform_bucket(p, end,
240 (struct crush_bucket_uniform *)b);
244 case CRUSH_BUCKET_LIST:
245 err = crush_decode_list_bucket(p, end,
246 (struct crush_bucket_list *)b);
250 case CRUSH_BUCKET_TREE:
251 err = crush_decode_tree_bucket(p, end,
252 (struct crush_bucket_tree *)b);
256 case CRUSH_BUCKET_STRAW:
257 err = crush_decode_straw_bucket(p, end,
258 (struct crush_bucket_straw *)b);
266 dout("rule vec is %p\n", c->rules);
267 for (i = 0; i < c->max_rules; i++) {
269 struct crush_rule *r;
271 ceph_decode_32_safe(p, end, yes, bad);
273 dout("crush_decode NO rule %d off %x %p to %p\n",
274 i, (int)(*p-start), *p, end);
279 dout("crush_decode rule %d off %x %p to %p\n",
280 i, (int)(*p-start), *p, end);
283 ceph_decode_32_safe(p, end, yes, bad);
284 #if BITS_PER_LONG == 32
286 if (yes > ULONG_MAX / sizeof(struct crush_rule_step))
289 r = c->rules[i] = kmalloc(sizeof(*r) +
290 yes*sizeof(struct crush_rule_step),
294 dout(" rule %d is at %p\n", i, r);
296 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
297 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
298 for (j = 0; j < r->len; j++) {
299 r->steps[j].op = ceph_decode_32(p);
300 r->steps[j].arg1 = ceph_decode_32(p);
301 r->steps[j].arg2 = ceph_decode_32(p);
305 /* ignore trailing name maps. */
307 dout("crush_decode success\n");
313 dout("crush_decode fail %d\n", err);
319 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
322 static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
334 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
335 struct rb_root *root)
337 struct rb_node **p = &root->rb_node;
338 struct rb_node *parent = NULL;
339 struct ceph_pg_mapping *pg = NULL;
344 pg = rb_entry(parent, struct ceph_pg_mapping, node);
345 c = pgid_cmp(new->pgid, pg->pgid);
354 rb_link_node(&new->node, parent, p);
355 rb_insert_color(&new->node, root);
359 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
362 struct rb_node *n = root->rb_node;
363 struct ceph_pg_mapping *pg;
367 pg = rb_entry(n, struct ceph_pg_mapping, node);
368 c = pgid_cmp(pgid, pg->pgid);
380 * rbtree of pg pool info
382 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
384 struct rb_node **p = &root->rb_node;
385 struct rb_node *parent = NULL;
386 struct ceph_pg_pool_info *pi = NULL;
390 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
391 if (new->id < pi->id)
393 else if (new->id > pi->id)
399 rb_link_node(&new->node, parent, p);
400 rb_insert_color(&new->node, root);
404 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, int id)
406 struct ceph_pg_pool_info *pi;
407 struct rb_node *n = root->rb_node;
410 pi = rb_entry(n, struct ceph_pg_pool_info, node);
413 else if (id > pi->id)
421 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
425 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
426 struct ceph_pg_pool_info *pi =
427 rb_entry(rbp, struct ceph_pg_pool_info, node);
428 if (pi->name && strcmp(pi->name, name) == 0)
433 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
435 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
437 rb_erase(&pi->node, root);
442 static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
446 ceph_decode_copy(p, &pi->v, sizeof(pi->v));
449 /* num_snaps * snap_info_t */
450 n = le32_to_cpu(pi->v.num_snaps);
452 ceph_decode_need(p, end, sizeof(u64) + 1 + sizeof(u64) +
453 sizeof(struct ceph_timespec), bad);
454 *p += sizeof(u64) + /* key */
455 1 + sizeof(u64) + /* u8, snapid */
456 sizeof(struct ceph_timespec);
457 m = ceph_decode_32(p); /* snap name */
461 *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
468 static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
470 struct ceph_pg_pool_info *pi;
473 ceph_decode_32_safe(p, end, num, bad);
474 dout(" %d pool names\n", num);
476 ceph_decode_32_safe(p, end, pool, bad);
477 ceph_decode_32_safe(p, end, len, bad);
478 dout(" pool %d len %d\n", pool, len);
479 pi = __lookup_pg_pool(&map->pg_pools, pool);
482 pi->name = kmalloc(len + 1, GFP_NOFS);
484 memcpy(pi->name, *p, len);
485 pi->name[len] = '\0';
486 dout(" name is %s\n", pi->name);
500 void ceph_osdmap_destroy(struct ceph_osdmap *map)
502 dout("osdmap_destroy %p\n", map);
504 crush_destroy(map->crush);
505 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
506 struct ceph_pg_mapping *pg =
507 rb_entry(rb_first(&map->pg_temp),
508 struct ceph_pg_mapping, node);
509 rb_erase(&pg->node, &map->pg_temp);
512 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
513 struct ceph_pg_pool_info *pi =
514 rb_entry(rb_first(&map->pg_pools),
515 struct ceph_pg_pool_info, node);
516 __remove_pg_pool(&map->pg_pools, pi);
518 kfree(map->osd_state);
519 kfree(map->osd_weight);
520 kfree(map->osd_addr);
525 * adjust max osd value. reallocate arrays.
527 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
530 struct ceph_entity_addr *addr;
533 state = kcalloc(max, sizeof(*state), GFP_NOFS);
534 addr = kcalloc(max, sizeof(*addr), GFP_NOFS);
535 weight = kcalloc(max, sizeof(*weight), GFP_NOFS);
536 if (state == NULL || addr == NULL || weight == NULL) {
544 if (map->osd_state) {
545 memcpy(state, map->osd_state, map->max_osd*sizeof(*state));
546 memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr));
547 memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight));
548 kfree(map->osd_state);
549 kfree(map->osd_addr);
550 kfree(map->osd_weight);
553 map->osd_state = state;
554 map->osd_weight = weight;
555 map->osd_addr = addr;
563 struct ceph_osdmap *osdmap_decode(void **p, void *end)
565 struct ceph_osdmap *map;
571 struct ceph_pg_pool_info *pi;
573 dout("osdmap_decode %p to %p len %d\n", *p, end, (int)(end - *p));
575 map = kzalloc(sizeof(*map), GFP_NOFS);
577 return ERR_PTR(-ENOMEM);
578 map->pg_temp = RB_ROOT;
580 ceph_decode_16_safe(p, end, version, bad);
581 if (version > CEPH_OSDMAP_VERSION) {
582 pr_warning("got unknown v %d > %d of osdmap\n", version,
583 CEPH_OSDMAP_VERSION);
587 ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
588 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
589 map->epoch = ceph_decode_32(p);
590 ceph_decode_copy(p, &map->created, sizeof(map->created));
591 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
593 ceph_decode_32_safe(p, end, max, bad);
595 ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad);
596 pi = kzalloc(sizeof(*pi), GFP_NOFS);
599 pi->id = ceph_decode_32(p);
600 ev = ceph_decode_8(p); /* encoding version */
601 if (ev > CEPH_PG_POOL_VERSION) {
602 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
603 ev, CEPH_PG_POOL_VERSION);
607 err = __decode_pool(p, end, pi);
610 __insert_pg_pool(&map->pg_pools, pi);
613 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
616 ceph_decode_32_safe(p, end, map->pool_max, bad);
618 ceph_decode_32_safe(p, end, map->flags, bad);
620 max = ceph_decode_32(p);
622 /* (re)alloc osd arrays */
623 err = osdmap_set_max_osd(map, max);
626 dout("osdmap_decode max_osd = %d\n", map->max_osd);
630 ceph_decode_need(p, end, 3*sizeof(u32) +
631 map->max_osd*(1 + sizeof(*map->osd_weight) +
632 sizeof(*map->osd_addr)), bad);
633 *p += 4; /* skip length field (should match max) */
634 ceph_decode_copy(p, map->osd_state, map->max_osd);
636 *p += 4; /* skip length field (should match max) */
637 for (i = 0; i < map->max_osd; i++)
638 map->osd_weight[i] = ceph_decode_32(p);
640 *p += 4; /* skip length field (should match max) */
641 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
642 for (i = 0; i < map->max_osd; i++)
643 ceph_decode_addr(&map->osd_addr[i]);
646 ceph_decode_32_safe(p, end, len, bad);
647 for (i = 0; i < len; i++) {
650 struct ceph_pg_mapping *pg;
652 ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
653 ceph_decode_copy(p, &pgid, sizeof(pgid));
654 n = ceph_decode_32(p);
655 ceph_decode_need(p, end, n * sizeof(u32), bad);
657 pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);
662 for (j = 0; j < n; j++)
663 pg->osds[j] = ceph_decode_32(p);
665 err = __insert_pg_mapping(pg, &map->pg_temp);
668 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len);
672 ceph_decode_32_safe(p, end, len, bad);
673 dout("osdmap_decode crush len %d from off 0x%x\n", len,
675 ceph_decode_need(p, end, len, bad);
676 map->crush = crush_decode(*p, end);
678 if (IS_ERR(map->crush)) {
679 err = PTR_ERR(map->crush);
684 /* ignore the rest of the map */
687 dout("osdmap_decode done %p %p\n", *p, end);
691 dout("osdmap_decode fail\n");
692 ceph_osdmap_destroy(map);
697 * decode and apply an incremental map update.
699 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
700 struct ceph_osdmap *map,
701 struct ceph_messenger *msgr)
703 struct crush_map *newcrush = NULL;
704 struct ceph_fsid fsid;
706 struct ceph_timespec modified;
708 __s32 new_pool_max, new_flags, max;
714 ceph_decode_16_safe(p, end, version, bad);
715 if (version > CEPH_OSDMAP_INC_VERSION) {
716 pr_warning("got unknown v %d > %d of inc osdmap\n", version,
717 CEPH_OSDMAP_INC_VERSION);
721 ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
723 ceph_decode_copy(p, &fsid, sizeof(fsid));
724 epoch = ceph_decode_32(p);
725 BUG_ON(epoch != map->epoch+1);
726 ceph_decode_copy(p, &modified, sizeof(modified));
727 new_pool_max = ceph_decode_32(p);
728 new_flags = ceph_decode_32(p);
731 ceph_decode_32_safe(p, end, len, bad);
733 dout("apply_incremental full map len %d, %p to %p\n",
735 return osdmap_decode(p, min(*p+len, end));
739 ceph_decode_32_safe(p, end, len, bad);
741 dout("apply_incremental new crush map len %d, %p to %p\n",
743 newcrush = crush_decode(*p, min(*p+len, end));
744 if (IS_ERR(newcrush))
745 return ERR_CAST(newcrush);
751 map->flags = new_flags;
752 if (new_pool_max >= 0)
753 map->pool_max = new_pool_max;
755 ceph_decode_need(p, end, 5*sizeof(u32), bad);
758 max = ceph_decode_32(p);
760 err = osdmap_set_max_osd(map, max);
766 map->modified = map->modified;
769 crush_destroy(map->crush);
770 map->crush = newcrush;
775 ceph_decode_32_safe(p, end, len, bad);
778 struct ceph_pg_pool_info *pi;
780 ceph_decode_32_safe(p, end, pool, bad);
781 ceph_decode_need(p, end, 1 + sizeof(pi->v), bad);
782 ev = ceph_decode_8(p); /* encoding version */
783 if (ev > CEPH_PG_POOL_VERSION) {
784 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
785 ev, CEPH_PG_POOL_VERSION);
788 pi = __lookup_pg_pool(&map->pg_pools, pool);
790 pi = kzalloc(sizeof(*pi), GFP_NOFS);
796 __insert_pg_pool(&map->pg_pools, pi);
798 err = __decode_pool(p, end, pi);
802 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
806 ceph_decode_32_safe(p, end, len, bad);
808 struct ceph_pg_pool_info *pi;
810 ceph_decode_32_safe(p, end, pool, bad);
811 pi = __lookup_pg_pool(&map->pg_pools, pool);
813 __remove_pg_pool(&map->pg_pools, pi);
818 ceph_decode_32_safe(p, end, len, bad);
821 struct ceph_entity_addr addr;
822 ceph_decode_32_safe(p, end, osd, bad);
823 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad);
824 ceph_decode_addr(&addr);
825 pr_info("osd%d up\n", osd);
826 BUG_ON(osd >= map->max_osd);
827 map->osd_state[osd] |= CEPH_OSD_UP;
828 map->osd_addr[osd] = addr;
832 ceph_decode_32_safe(p, end, len, bad);
835 ceph_decode_32_safe(p, end, osd, bad);
836 (*p)++; /* clean flag */
837 pr_info("osd%d down\n", osd);
838 if (osd < map->max_osd)
839 map->osd_state[osd] &= ~CEPH_OSD_UP;
843 ceph_decode_32_safe(p, end, len, bad);
846 ceph_decode_need(p, end, sizeof(u32)*2, bad);
847 osd = ceph_decode_32(p);
848 off = ceph_decode_32(p);
849 pr_info("osd%d weight 0x%x %s\n", osd, off,
850 off == CEPH_OSD_IN ? "(in)" :
851 (off == CEPH_OSD_OUT ? "(out)" : ""));
852 if (osd < map->max_osd)
853 map->osd_weight[osd] = off;
857 rbp = rb_first(&map->pg_temp);
858 ceph_decode_32_safe(p, end, len, bad);
860 struct ceph_pg_mapping *pg;
864 ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
865 ceph_decode_copy(p, &pgid, sizeof(pgid));
866 pglen = ceph_decode_32(p);
869 while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping,
870 node)->pgid, pgid) <= 0) {
871 struct ceph_pg_mapping *cur =
872 rb_entry(rbp, struct ceph_pg_mapping, node);
875 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
876 rb_erase(&cur->node, &map->pg_temp);
882 ceph_decode_need(p, end, pglen*sizeof(u32), bad);
883 pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
890 for (j = 0; j < pglen; j++)
891 pg->osds[j] = ceph_decode_32(p);
892 err = __insert_pg_mapping(pg, &map->pg_temp);
897 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
902 struct ceph_pg_mapping *cur =
903 rb_entry(rbp, struct ceph_pg_mapping, node);
906 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
907 rb_erase(&cur->node, &map->pg_temp);
911 /* ignore the rest */
916 pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n",
917 epoch, (int)(*p - start), *p, start, end);
918 print_hex_dump(KERN_DEBUG, "osdmap: ",
919 DUMP_PREFIX_OFFSET, 16, 1,
920 start, end - start, true);
922 crush_destroy(newcrush);
930 * calculate file layout from given offset, length.
931 * fill in correct oid, logical length, and object extent
934 * for now, we write only a single su, until we can
935 * pass a stride back to the caller.
937 void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
940 u64 *oxoff, u64 *oxlen)
942 u32 osize = le32_to_cpu(layout->fl_object_size);
943 u32 su = le32_to_cpu(layout->fl_stripe_unit);
944 u32 sc = le32_to_cpu(layout->fl_stripe_count);
945 u32 bl, stripeno, stripepos, objsetno;
949 dout("mapping %llu~%llu osize %u fl_su %u\n", off, *plen,
951 su_per_object = osize / su;
952 dout("osize %u / su %u = su_per_object %u\n", osize, su,
955 BUG_ON((su & ~PAGE_MASK) != 0);
956 /* bl = *off / su; */
960 dout("off %llu / su %u = bl %u\n", off, su, bl);
964 objsetno = stripeno / su_per_object;
966 *ono = objsetno * sc + stripepos;
967 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned)*ono);
969 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
971 su_offset = do_div(t, su);
972 *oxoff = su_offset + (stripeno % su_per_object) * su;
975 * Calculate the length of the extent being written to the selected
976 * object. This is the minimum of the full length requested (plen) or
977 * the remainder of the current stripe being written to.
979 *oxlen = min_t(u64, *plen, su - su_offset);
982 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
984 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
987 * calculate an object layout (i.e. pgid) from an oid,
988 * file_layout, and osdmap
990 int ceph_calc_object_layout(struct ceph_object_layout *ol,
992 struct ceph_file_layout *fl,
993 struct ceph_osdmap *osdmap)
995 unsigned num, num_mask;
997 s32 preferred = (s32)le32_to_cpu(fl->fl_pg_preferred);
998 int poolid = le32_to_cpu(fl->fl_pg_pool);
999 struct ceph_pg_pool_info *pool;
1004 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1007 ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
1008 if (preferred >= 0) {
1010 num = le32_to_cpu(pool->v.lpg_num);
1011 num_mask = pool->lpg_num_mask;
1013 num = le32_to_cpu(pool->v.pg_num);
1014 num_mask = pool->pg_num_mask;
1017 pgid.ps = cpu_to_le16(ps);
1018 pgid.preferred = cpu_to_le16(preferred);
1019 pgid.pool = fl->fl_pg_pool;
1021 dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps,
1024 dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
1027 ol->ol_stripe_unit = fl->fl_object_stripe_unit;
1030 EXPORT_SYMBOL(ceph_calc_object_layout);
1033 * Calculate raw osd vector for the given pgid. Return pointer to osd
1034 * array, or NULL on failure.
1036 static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1037 int *osds, int *num)
1039 struct ceph_pg_mapping *pg;
1040 struct ceph_pg_pool_info *pool;
1042 unsigned poolid, ps, pps;
1046 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1053 poolid = le32_to_cpu(pgid.pool);
1054 ps = le16_to_cpu(pgid.ps);
1055 preferred = (s16)le16_to_cpu(pgid.preferred);
1057 /* don't forcefeed bad device ids to crush */
1058 if (preferred >= osdmap->max_osd ||
1059 preferred >= osdmap->crush->max_devices)
1062 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1065 ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
1066 pool->v.type, pool->v.size);
1068 pr_err("no crush rule pool %d ruleset %d type %d size %d\n",
1069 poolid, pool->v.crush_ruleset, pool->v.type,
1075 pps = ceph_stable_mod(ps,
1076 le32_to_cpu(pool->v.lpgp_num),
1077 pool->lpgp_num_mask);
1079 pps = ceph_stable_mod(ps,
1080 le32_to_cpu(pool->v.pgp_num),
1081 pool->pgp_num_mask);
1083 *num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
1084 min_t(int, pool->v.size, *num),
1085 preferred, osdmap->osd_weight);
1090 * Return acting set for given pgid.
1092 int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1095 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1096 int i, o, num = CEPH_PG_MAX_SIZE;
1098 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1102 /* primary is first up osd */
1104 for (i = 0; i < num; i++)
1105 if (ceph_osd_is_up(osdmap, osds[i]))
1106 acting[o++] = osds[i];
1111 * Return primary osd for given pgid, or -1 if none.
1113 int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1115 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1116 int i, num = CEPH_PG_MAX_SIZE;
1118 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1122 /* primary is first up osd */
1123 for (i = 0; i < num; i++)
1124 if (ceph_osd_is_up(osdmap, osds[i]))
1128 EXPORT_SYMBOL(ceph_calc_pg_primary);