#include <linux/ceph/ceph_debug.h> #include <linux/module.h> #include <linux/slab.h> #include <asm/div64.h> #include <linux/ceph/libceph.h> #include <linux/ceph/osdmap.h> #include <linux/ceph/decode.h> #include <linux/crush/hash.h> #include <linux/crush/mapper.h> char *ceph_osdmap_state_str(char *str, int len, int state) { if (!len) return str; if ((state & CEPH_OSD_EXISTS) && (state & CEPH_OSD_UP)) snprintf(str, len, "exists, up"); else if (state & CEPH_OSD_EXISTS) snprintf(str, len, "exists"); else if (state & CEPH_OSD_UP) snprintf(str, len, "up"); else snprintf(str, len, "doesn't exist"); return str; } /* maps */ static int calc_bits_of(unsigned int t) { int b = 0; while (t) { t = t >> 1; b++; } return b; } /* * the foo_mask is the smallest value 2^n-1 that is >= foo. */ static void calc_pg_masks(struct ceph_pg_pool_info *pi) { pi->pg_num_mask = (1 << calc_bits_of(pi->pg_num-1)) - 1; pi->pgp_num_mask = (1 << calc_bits_of(pi->pgp_num-1)) - 1; } /* * decode crush map */ static int crush_decode_uniform_bucket(void **p, void *end, struct crush_bucket_uniform *b) { dout("crush_decode_uniform_bucket %p to %p\n", *p, end); ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad); b->item_weight = ceph_decode_32(p); return 0; bad: return -EINVAL; } static int crush_decode_list_bucket(void **p, void *end, struct crush_bucket_list *b) { int j; dout("crush_decode_list_bucket %p to %p\n", *p, end); b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS); if (b->item_weights == NULL) return -ENOMEM; b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS); if (b->sum_weights == NULL) return -ENOMEM; ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad); for (j = 0; j < b->h.size; j++) { b->item_weights[j] = ceph_decode_32(p); b->sum_weights[j] = ceph_decode_32(p); } return 0; bad: return -EINVAL; } static int crush_decode_tree_bucket(void **p, void *end, struct crush_bucket_tree *b) { int j; dout("crush_decode_tree_bucket %p to %p\n", *p, end); ceph_decode_32_safe(p, end, b->num_nodes, bad); b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS); if (b->node_weights == NULL) return -ENOMEM; ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad); for (j = 0; j < b->num_nodes; j++) b->node_weights[j] = ceph_decode_32(p); return 0; bad: return -EINVAL; } static int crush_decode_straw_bucket(void **p, void *end, struct crush_bucket_straw *b) { int j; dout("crush_decode_straw_bucket %p to %p\n", *p, end); b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS); if (b->item_weights == NULL) return -ENOMEM; b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS); if (b->straws == NULL) return -ENOMEM; ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad); for (j = 0; j < b->h.size; j++) { b->item_weights[j] = ceph_decode_32(p); b->straws[j] = ceph_decode_32(p); } return 0; bad: return -EINVAL; } static int skip_name_map(void **p, void *end) { int len; ceph_decode_32_safe(p, end, len ,bad); while (len--) { int strlen; *p += sizeof(u32); ceph_decode_32_safe(p, end, strlen, bad); *p += strlen; } return 0; bad: return -EINVAL; } static struct crush_map *crush_decode(void *pbyval, void *end) { struct crush_map *c; int err = -EINVAL; int i, j; void **p = &pbyval; void *start = pbyval; u32 magic; u32 num_name_maps; dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p)); c = kzalloc(sizeof(*c), GFP_NOFS); if (c == NULL) return ERR_PTR(-ENOMEM); /* set tunables to default values */ c->choose_local_tries = 2; c->choose_local_fallback_tries = 5; c->choose_total_tries = 19; c->chooseleaf_descend_once = 0; ceph_decode_need(p, end, 4*sizeof(u32), bad); magic = ceph_decode_32(p); if (magic != CRUSH_MAGIC) { pr_err("crush_decode magic %x != current %x\n", (unsigned int)magic, (unsigned int)CRUSH_MAGIC); goto bad; } c->max_buckets = ceph_decode_32(p); c->max_rules = ceph_decode_32(p); c->max_devices = ceph_decode_32(p); c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS); if (c->buckets == NULL) goto badmem; c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS); if (c->rules == NULL) goto badmem; /* buckets */ for (i = 0; i < c->max_buckets; i++) { int size = 0; u32 alg; struct crush_bucket *b; ceph_decode_32_safe(p, end, alg, bad); if (alg == 0) { c->buckets[i] = NULL; continue; } dout("crush_decode bucket %d off %x %p to %p\n", i, (int)(*p-start), *p, end); switch (alg) { case CRUSH_BUCKET_UNIFORM: size = sizeof(struct crush_bucket_uniform); break; case CRUSH_BUCKET_LIST: size = sizeof(struct crush_bucket_list); break; case CRUSH_BUCKET_TREE: size = sizeof(struct crush_bucket_tree); break; case CRUSH_BUCKET_STRAW: size = sizeof(struct crush_bucket_straw); break; default: err = -EINVAL; goto bad; } BUG_ON(size == 0); b = c->buckets[i] = kzalloc(size, GFP_NOFS); if (b == NULL) goto badmem; ceph_decode_need(p, end, 4*sizeof(u32), bad); b->id = ceph_decode_32(p); b->type = ceph_decode_16(p); b->alg = ceph_decode_8(p); b->hash = ceph_decode_8(p); b->weight = ceph_decode_32(p); b->size = ceph_decode_32(p); dout("crush_decode bucket size %d off %x %p to %p\n", b->size, (int)(*p-start), *p, end); b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS); if (b->items == NULL) goto badmem; b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS); if (b->perm == NULL) goto badmem; b->perm_n = 0; ceph_decode_need(p, end, b->size*sizeof(u32), bad); for (j = 0; j < b->size; j++) b->items[j] = ceph_decode_32(p); switch (b->alg) { case CRUSH_BUCKET_UNIFORM: err = crush_decode_uniform_bucket(p, end, (struct crush_bucket_uniform *)b); if (err < 0) goto bad; break; case CRUSH_BUCKET_LIST: err = crush_decode_list_bucket(p, end, (struct crush_bucket_list *)b); if (err < 0) goto bad; break; case CRUSH_BUCKET_TREE: err = crush_decode_tree_bucket(p, end, (struct crush_bucket_tree *)b); if (err < 0) goto bad; break; case CRUSH_BUCKET_STRAW: err = crush_decode_straw_bucket(p, end, (struct crush_bucket_straw *)b); if (err < 0) goto bad; break; } } /* rules */ dout("rule vec is %p\n", c->rules); for (i = 0; i < c->max_rules; i++) { u32 yes; struct crush_rule *r; ceph_decode_32_safe(p, end, yes, bad); if (!yes) { dout("crush_decode NO rule %d off %x %p to %p\n", i, (int)(*p-start), *p, end); c->rules[i] = NULL; continue; } dout("crush_decode rule %d off %x %p to %p\n", i, (int)(*p-start), *p, end); /* len */ ceph_decode_32_safe(p, end, yes, bad); #if BITS_PER_LONG == 32 err = -EINVAL; if (yes > (ULONG_MAX - sizeof(*r)) / sizeof(struct crush_rule_step)) goto bad; #endif r = c->rules[i] = kmalloc(sizeof(*r) + yes*sizeof(struct crush_rule_step), GFP_NOFS); if (r == NULL) goto badmem; dout(" rule %d is at %p\n", i, r); r->len = yes; ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */ ceph_decode_need(p, end, r->len*3*sizeof(u32), bad); for (j = 0; j < r->len; j++) { r->steps[j].op = ceph_decode_32(p); r->steps[j].arg1 = ceph_decode_32(p); r->steps[j].arg2 = ceph_decode_32(p); } } /* ignore trailing name maps. */ for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) { err = skip_name_map(p, end); if (err < 0) goto done; } /* tunables */ ceph_decode_need(p, end, 3*sizeof(u32), done); c->choose_local_tries = ceph_decode_32(p); c->choose_local_fallback_tries = ceph_decode_32(p); c->choose_total_tries = ceph_decode_32(p); dout("crush decode tunable choose_local_tries = %d", c->choose_local_tries); dout("crush decode tunable choose_local_fallback_tries = %d", c->choose_local_fallback_tries); dout("crush decode tunable choose_total_tries = %d", c->choose_total_tries); ceph_decode_need(p, end, sizeof(u32), done); c->chooseleaf_descend_once = ceph_decode_32(p); dout("crush decode tunable chooseleaf_descend_once = %d", c->chooseleaf_descend_once); done: dout("crush_decode success\n"); return c; badmem: err = -ENOMEM; bad: dout("crush_decode fail %d\n", err); crush_destroy(c); return ERR_PTR(err); } /* * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid * to a set of osds) */ static int pgid_cmp(struct ceph_pg l, struct ceph_pg r) { if (l.pool < r.pool) return -1; if (l.pool > r.pool) return 1; if (l.seed < r.seed) return -1; if (l.seed > r.seed) return 1; return 0; } static int __insert_pg_mapping(struct ceph_pg_mapping *new, struct rb_root *root) { struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; struct ceph_pg_mapping *pg = NULL; int c; dout("__insert_pg_mapping %llx %p\n", *(u64 *)&new->pgid, new); while (*p) { parent = *p; pg = rb_entry(parent, struct ceph_pg_mapping, node); c = pgid_cmp(new->pgid, pg->pgid); if (c < 0) p = &(*p)->rb_left; else if (c > 0) p = &(*p)->rb_right; else return -EEXIST; } rb_link_node(&new->node, parent, p); rb_insert_color(&new->node, root); return 0; } static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root, struct ceph_pg pgid) { struct rb_node *n = root->rb_node; struct ceph_pg_mapping *pg; int c; while (n) { pg = rb_entry(n, struct ceph_pg_mapping, node); c = pgid_cmp(pgid, pg->pgid); if (c < 0) { n = n->rb_left; } else if (c > 0) { n = n->rb_right; } else { dout("__lookup_pg_mapping %lld.%x got %p\n", pgid.pool, pgid.seed, pg); return pg; } } return NULL; } static int __remove_pg_mapping(struct rb_root *root, struct ceph_pg pgid) { struct ceph_pg_mapping *pg = __lookup_pg_mapping(root, pgid); if (pg) { dout("__remove_pg_mapping %lld.%x %p\n", pgid.pool, pgid.seed, pg); rb_erase(&pg->node, root); kfree(pg); return 0; } dout("__remove_pg_mapping %lld.%x dne\n", pgid.pool, pgid.seed); return -ENOENT; } /* * rbtree of pg pool info */ static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new) { struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; struct ceph_pg_pool_info *pi = NULL; while (*p) { parent = *p; pi = rb_entry(parent, struct ceph_pg_pool_info, node); if (new->id < pi->id) p = &(*p)->rb_left; else if (new->id > pi->id) p = &(*p)->rb_right; else return -EEXIST; } rb_link_node(&new->node, parent, p); rb_insert_color(&new->node, root); return 0; } static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id) { struct ceph_pg_pool_info *pi; struct rb_node *n = root->rb_node; while (n) { pi = rb_entry(n, struct ceph_pg_pool_info, node); if (id < pi->id) n = n->rb_left; else if (id > pi->id) n = n->rb_right; else return pi; } return NULL; } const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id) { struct ceph_pg_pool_info *pi; if (id == CEPH_NOPOOL) return NULL; if (WARN_ON_ONCE(id > (u64) INT_MAX)) return NULL; pi = __lookup_pg_pool(&map->pg_pools, (int) id); return pi ? pi->name : NULL; } EXPORT_SYMBOL(ceph_pg_pool_name_by_id); int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name) { struct rb_node *rbp; for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) { struct ceph_pg_pool_info *pi = rb_entry(rbp, struct ceph_pg_pool_info, node); if (pi->name && strcmp(pi->name, name) == 0) return pi->id; } return -ENOENT; } EXPORT_SYMBOL(ceph_pg_poolid_by_name); static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi) { rb_erase(&pi->node, root); kfree(pi->name); kfree(pi); } static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi) { u8 ev, cv; unsigned len, num; void *pool_end; ceph_decode_need(p, end, 2 + 4, bad); ev = ceph_decode_8(p); /* encoding version */ cv = ceph_decode_8(p); /* compat version */ if (ev < 5) { pr_warning("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv); return -EINVAL; } if (cv > 7) { pr_warning("got v %d cv %d > 7 of ceph_pg_pool\n", ev, cv); return -EINVAL; } len = ceph_decode_32(p); ceph_decode_need(p, end, len, bad); pool_end = *p + len; pi->type = ceph_decode_8(p); pi->size = ceph_decode_8(p); pi->crush_ruleset = ceph_decode_8(p); pi->object_hash = ceph_decode_8(p); pi->pg_num = ceph_decode_32(p); pi->pgp_num = ceph_decode_32(p); *p += 4 + 4; /* skip lpg* */ *p += 4; /* skip last_change */ *p += 8 + 4; /* skip snap_seq, snap_epoch */ /* skip snaps */ num = ceph_decode_32(p); while (num--) { *p += 8; /* snapid key */ *p += 1 + 1; /* versions */ len = ceph_decode_32(p); *p += len; } /* skip removed snaps */ num = ceph_decode_32(p); *p += num * (8 + 8); *p += 8; /* skip auid */ pi->flags = ceph_decode_64(p); /* ignore the rest */ *p = pool_end; calc_pg_masks(pi); return 0; bad: return -EINVAL; } static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map) { struct ceph_pg_pool_info *pi; u32 num, len; u64 pool; ceph_decode_32_safe(p, end, num, bad); dout(" %d pool names\n", num); while (num--) { ceph_decode_64_safe(p, end, pool, bad); ceph_decode_32_safe(p, end, len, bad); dout(" pool %llu len %d\n", pool, len); ceph_decode_need(p, end, len, bad); pi = __lookup_pg_pool(&map->pg_pools, pool); if (pi) { char *name = kstrndup(*p, len, GFP_NOFS); if (!name) return -ENOMEM; kfree(pi->name); pi->name = name; dout(" name is %s\n", pi->name); } *p += len; } return 0; bad: return -EINVAL; } /* * osd map */ void ceph_osdmap_destroy(struct ceph_osdmap *map) { dout("osdmap_destroy %p\n", map); if (map->crush) crush_destroy(map->crush); while (!RB_EMPTY_ROOT(&map->pg_temp)) { struct ceph_pg_mapping *pg = rb_entry(rb_first(&map->pg_temp), struct ceph_pg_mapping, node); rb_erase(&pg->node, &map->pg_temp); kfree(pg); } while (!RB_EMPTY_ROOT(&map->pg_pools)) { struct ceph_pg_pool_info *pi = rb_entry(rb_first(&map->pg_pools), struct ceph_pg_pool_info, node); __remove_pg_pool(&map->pg_pools, pi); } kfree(map->osd_state); kfree(map->osd_weight); kfree(map->osd_addr); kfree(map); } /* * adjust max osd value. reallocate arrays. */ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max) { u8 *state; struct ceph_entity_addr *addr; u32 *weight; state = kcalloc(max, sizeof(*state), GFP_NOFS); addr = kcalloc(max, sizeof(*addr), GFP_NOFS); weight = kcalloc(max, sizeof(*weight), GFP_NOFS); if (state == NULL || addr == NULL || weight == NULL) { kfree(state); kfree(addr); kfree(weight); return -ENOMEM; } /* copy old? */ if (map->osd_state) { memcpy(state, map->osd_state, map->max_osd*sizeof(*state)); memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr)); memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight)); kfree(map->osd_state); kfree(map->osd_addr); kfree(map->osd_weight); } map->osd_state = state; map->osd_weight = weight; map->osd_addr = addr; map->max_osd = max; return 0; } static int __decode_pgid(void **p, void *end, struct ceph_pg *pg) { u8 v; ceph_decode_need(p, end, 1+8+4+4, bad); v = ceph_decode_8(p); if (v != 1) goto bad; pg->pool = ceph_decode_64(p); pg->seed = ceph_decode_32(p); *p += 4; /* skip preferred */ return 0; bad: dout("error decoding pgid\n"); return -EINVAL; } /* * decode a full map. */ struct ceph_osdmap *osdmap_decode(void **p, void *end) { struct ceph_osdmap *map; u16 version; u32 len, max, i; int err = -EINVAL; void *start = *p; struct ceph_pg_pool_info *pi; dout("osdmap_decode %p to %p len %d\n", *p, end, (int)(end - *p)); map = kzalloc(sizeof(*map), GFP_NOFS); if (map == NULL) return ERR_PTR(-ENOMEM); map->pg_temp = RB_ROOT; ceph_decode_16_safe(p, end, version, bad); if (version > 6) { pr_warning("got unknown v %d > 6 of osdmap\n", version); goto bad; } if (version < 6) { pr_warning("got old v %d < 6 of osdmap\n", version); goto bad; } ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad); ceph_decode_copy(p, &map->fsid, sizeof(map->fsid)); map->epoch = ceph_decode_32(p); ceph_decode_copy(p, &map->created, sizeof(map->created)); ceph_decode_copy(p, &map->modified, sizeof(map->modified)); ceph_decode_32_safe(p, end, max, bad); while (max--) { ceph_decode_need(p, end, 8 + 2, bad); err = -ENOMEM; pi = kzalloc(sizeof(*pi), GFP_NOFS); if (!pi) goto bad; pi->id = ceph_decode_64(p); err = __decode_pool(p, end, pi); if (err < 0) { kfree(pi); goto bad; } __insert_pg_pool(&map->pg_pools, pi); } err = __decode_pool_names(p, end, map); if (err < 0) { dout("fail to decode pool names"); goto bad; } ceph_decode_32_safe(p, end, map->pool_max, bad); ceph_decode_32_safe(p, end, map->flags, bad); max = ceph_decode_32(p); /* (re)alloc osd arrays */ err = osdmap_set_max_osd(map, max); if (err < 0) goto bad; dout("osdmap_decode max_osd = %d\n", map->max_osd); /* osds */ err = -EINVAL; ceph_decode_need(p, end, 3*sizeof(u32) + map->max_osd*(1 + sizeof(*map->osd_weight) + sizeof(*map->osd_addr)), bad); *p += 4; /* skip length field (should match max) */ ceph_decode_copy(p, map->osd_state, map->max_osd); *p += 4; /* skip length field (should match max) */ for (i = 0; i < map->max_osd; i++) map->osd_weight[i] = ceph_decode_32(p); *p += 4; /* skip length field (should match max) */ ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr)); for (i = 0; i < map->max_osd; i++) ceph_decode_addr(&map->osd_addr[i]); /* pg_temp */ ceph_decode_32_safe(p, end, len, bad); for (i = 0; i < len; i++) { int n, j; struct ceph_pg pgid; struct ceph_pg_mapping *pg; err = __decode_pgid(p, end, &pgid); if (err) goto bad; ceph_decode_need(p, end, sizeof(u32), bad); n = ceph_decode_32(p); err = -EINVAL; if (n > (UINT_MAX - sizeof(*pg)) / sizeof(u32)) goto bad; ceph_decode_need(p, end, n * sizeof(u32), bad); err = -ENOMEM; pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS); if (!pg) goto bad; pg->pgid = pgid; pg->len = n; for (j = 0; j < n; j++) pg->osds[j] = ceph_decode_32(p); err = __insert_pg_mapping(pg, &map->pg_temp); if (err) goto bad; dout(" added pg_temp %lld.%x len %d\n", pgid.pool, pgid.seed, len); } /* crush */ ceph_decode_32_safe(p, end, len, bad); dout("osdmap_decode crush len %d from off 0x%x\n", len, (int)(*p - start)); ceph_decode_need(p, end, len, bad); map->crush = crush_decode(*p, end); *p += len; if (IS_ERR(map->crush)) { err = PTR_ERR(map->crush); map->crush = NULL; goto bad; } /* ignore the rest of the map */ *p = end; dout("osdmap_decode done %p %p\n", *p, end); return map; bad: dout("osdmap_decode fail err %d\n", err); ceph_osdmap_destroy(map); return ERR_PTR(err); } /* * decode and apply an incremental map update. */ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, struct ceph_osdmap *map, struct ceph_messenger *msgr) { struct crush_map *newcrush = NULL; struct ceph_fsid fsid; u32 epoch = 0; struct ceph_timespec modified; s32 len; u64 pool; __s64 new_pool_max; __s32 new_flags, max; void *start = *p; int err = -EINVAL; u16 version; ceph_decode_16_safe(p, end, version, bad); if (version != 6) { pr_warning("got unknown v %d != 6 of inc osdmap\n", version); goto bad; } ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32), bad); ceph_decode_copy(p, &fsid, sizeof(fsid)); epoch = ceph_decode_32(p); BUG_ON(epoch != map->epoch+1); ceph_decode_copy(p, &modified, sizeof(modified)); new_pool_max = ceph_decode_64(p); new_flags = ceph_decode_32(p); /* full map? */ ceph_decode_32_safe(p, end, len, bad); if (len > 0) { dout("apply_incremental full map len %d, %p to %p\n", len, *p, end); return osdmap_decode(p, min(*p+len, end)); } /* new crush? */ ceph_decode_32_safe(p, end, len, bad); if (len > 0) { dout("apply_incremental new crush map len %d, %p to %p\n", len, *p, end); newcrush = crush_decode(*p, min(*p+len, end)); if (IS_ERR(newcrush)) return ERR_CAST(newcrush); *p += len; } /* new flags? */ if (new_flags >= 0) map->flags = new_flags; if (new_pool_max >= 0) map->pool_max = new_pool_max; ceph_decode_need(p, end, 5*sizeof(u32), bad); /* new max? */ max = ceph_decode_32(p); if (max >= 0) { err = osdmap_set_max_osd(map, max); if (err < 0) goto bad; } map->epoch++; map->modified = modified; if (newcrush) { if (map->crush) crush_destroy(map->crush); map->crush = newcrush; newcrush = NULL; } /* new_pool */ ceph_decode_32_safe(p, end, len, bad); while (len--) { struct ceph_pg_pool_info *pi; ceph_decode_64_safe(p, end, pool, bad); pi = __lookup_pg_pool(&map->pg_pools, pool); if (!pi) { pi = kzalloc(sizeof(*pi), GFP_NOFS); if (!pi) { err = -ENOMEM; goto bad; } pi->id = pool; __insert_pg_pool(&map->pg_pools, pi); } err = __decode_pool(p, end, pi); if (err < 0) goto bad; } if (version >= 5) { err = __decode_pool_names(p, end, map); if (err < 0) goto bad; } /* old_pool */ ceph_decode_32_safe(p, end, len, bad); while (len--) { struct ceph_pg_pool_info *pi; ceph_decode_64_safe(p, end, pool, bad); pi = __lookup_pg_pool(&map->pg_pools, pool); if (pi) __remove_pg_pool(&map->pg_pools, pi); } /* new_up */ err = -EINVAL; ceph_decode_32_safe(p, end, len, bad); while (len--) { u32 osd; struct ceph_entity_addr addr; ceph_decode_32_safe(p, end, osd, bad); ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad); ceph_decode_addr(&addr); pr_info("osd%d up\n", osd); BUG_ON(osd >= map->max_osd); map->osd_state[osd] |= CEPH_OSD_UP; map->osd_addr[osd] = addr; } /* new_state */ ceph_decode_32_safe(p, end, len, bad); while (len--) { u32 osd; u8 xorstate; ceph_decode_32_safe(p, end, osd, bad); xorstate = **(u8 **)p; (*p)++; /* clean flag */ if (xorstate == 0) xorstate = CEPH_OSD_UP; if (xorstate & CEPH_OSD_UP) pr_info("osd%d down\n", osd); if (osd < map->max_osd) map->osd_state[osd] ^= xorstate; } /* new_weight */ ceph_decode_32_safe(p, end, len, bad); while (len--) { u32 osd, off; ceph_decode_need(p, end, sizeof(u32)*2, bad); osd = ceph_decode_32(p); off = ceph_decode_32(p); pr_info("osd%d weight 0x%x %s\n", osd, off, off == CEPH_OSD_IN ? "(in)" : (off == CEPH_OSD_OUT ? "(out)" : "")); if (osd < map->max_osd) map->osd_weight[osd] = off; } /* new_pg_temp */ ceph_decode_32_safe(p, end, len, bad); while (len--) { struct ceph_pg_mapping *pg; int j; struct ceph_pg pgid; u32 pglen; err = __decode_pgid(p, end, &pgid); if (err) goto bad; ceph_decode_need(p, end, sizeof(u32), bad); pglen = ceph_decode_32(p); if (pglen) { ceph_decode_need(p, end, pglen*sizeof(u32), bad); /* removing existing (if any) */ (void) __remove_pg_mapping(&map->pg_temp, pgid); /* insert */ err = -EINVAL; if (pglen > (UINT_MAX - sizeof(*pg)) / sizeof(u32)) goto bad; err = -ENOMEM; pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS); if (!pg) goto bad; pg->pgid = pgid; pg->len = pglen; for (j = 0; j < pglen; j++) pg->osds[j] = ceph_decode_32(p); err = __insert_pg_mapping(pg, &map->pg_temp); if (err) { kfree(pg); goto bad; } dout(" added pg_temp %lld.%x len %d\n", pgid.pool, pgid.seed, pglen); } else { /* remove */ __remove_pg_mapping(&map->pg_temp, pgid); } } /* ignore the rest */ *p = end; return map; bad: pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n", epoch, (int)(*p - start), *p, start, end); print_hex_dump(KERN_DEBUG, "osdmap: ", DUMP_PREFIX_OFFSET, 16, 1, start, end - start, true); if (newcrush) crush_destroy(newcrush); return ERR_PTR(err); } /* * calculate file layout from given offset, length. * fill in correct oid, logical length, and object extent * offset, length. * * for now, we write only a single su, until we can * pass a stride back to the caller. */ int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, u64 off, u64 len, u64 *ono, u64 *oxoff, u64 *oxlen) { u32 osize = le32_to_cpu(layout->fl_object_size); u32 su = le32_to_cpu(layout->fl_stripe_unit); u32 sc = le32_to_cpu(layout->fl_stripe_count); u32 bl, stripeno, stripepos, objsetno; u32 su_per_object; u64 t, su_offset; dout("mapping %llu~%llu osize %u fl_su %u\n", off, len, osize, su); if (su == 0 || sc == 0) goto invalid; su_per_object = osize / su; if (su_per_object == 0) goto invalid; dout("osize %u / su %u = su_per_object %u\n", osize, su, su_per_object); if ((su & ~PAGE_MASK) != 0) goto invalid; /* bl = *off / su; */ t = off; do_div(t, su); bl = t; dout("off %llu / su %u = bl %u\n", off, su, bl); stripeno = bl / sc; stripepos = bl % sc; objsetno = stripeno / su_per_object; *ono = objsetno * sc + stripepos; dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono); /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */ t = off; su_offset = do_div(t, su); *oxoff = su_offset + (stripeno % su_per_object) * su; /* * Calculate the length of the extent being written to the selected * object. This is the minimum of the full length requested (len) or * the remainder of the current stripe being written to. */ *oxlen = min_t(u64, len, su - su_offset); dout(" obj extent %llu~%llu\n", *oxoff, *oxlen); return 0; invalid: dout(" invalid layout\n"); *ono = 0; *oxoff = 0; *oxlen = 0; return -EINVAL; } EXPORT_SYMBOL(ceph_calc_file_object_mapping); /* * calculate an object layout (i.e. pgid) from an oid, * file_layout, and osdmap */ int ceph_calc_ceph_pg(struct ceph_pg *pg, const char *oid, struct ceph_osdmap *osdmap, uint64_t pool) { struct ceph_pg_pool_info *pool_info; BUG_ON(!osdmap); pool_info = __lookup_pg_pool(&osdmap->pg_pools, pool); if (!pool_info) return -EIO; pg->pool = pool; pg->seed = ceph_str_hash(pool_info->object_hash, oid, strlen(oid)); dout("%s '%s' pgid %lld.%x\n", __func__, oid, pg->pool, pg->seed); return 0; } EXPORT_SYMBOL(ceph_calc_ceph_pg); /* * Calculate raw osd vector for the given pgid. Return pointer to osd * array, or NULL on failure. */ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid, int *osds, int *num) { struct ceph_pg_mapping *pg; struct ceph_pg_pool_info *pool; int ruleno; int r; u32 pps; pool = __lookup_pg_pool(&osdmap->pg_pools, pgid.pool); if (!pool) return NULL; /* pg_temp? */ pgid.seed = ceph_stable_mod(pgid.seed, pool->pg_num, pool->pgp_num_mask); pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid); if (pg) { *num = pg->len; return pg->osds; } /* crush */ ruleno = crush_find_rule(osdmap->crush, pool->crush_ruleset, pool->type, pool->size); if (ruleno < 0) { pr_err("no crush rule pool %lld ruleset %d type %d size %d\n", pgid.pool, pool->crush_ruleset, pool->type, pool->size); return NULL; } if (pool->flags & CEPH_POOL_FLAG_HASHPSPOOL) { /* hash pool id and seed sothat pool PGs do not overlap */ pps = crush_hash32_2(CRUSH_HASH_RJENKINS1, ceph_stable_mod(pgid.seed, pool->pgp_num, pool->pgp_num_mask), pgid.pool); } else { /* * legacy ehavior: add ps and pool together. this is * not a great approach because the PGs from each pool * will overlap on top of each other: 0.5 == 1.4 == * 2.3 == ... */ pps = ceph_stable_mod(pgid.seed, pool->pgp_num, pool->pgp_num_mask) + (unsigned)pgid.pool; } r = crush_do_rule(osdmap->crush, ruleno, pps, osds, min_t(int, pool->size, *num), osdmap->osd_weight); if (r < 0) { pr_err("error %d from crush rule: pool %lld ruleset %d type %d" " size %d\n", r, pgid.pool, pool->crush_ruleset, pool->type, pool->size); return NULL; } *num = r; return osds; } /* * Return acting set for given pgid. */ int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid, int *acting) { int rawosds[CEPH_PG_MAX_SIZE], *osds; int i, o, num = CEPH_PG_MAX_SIZE; osds = calc_pg_raw(osdmap, pgid, rawosds, &num); if (!osds) return -1; /* primary is first up osd */ o = 0; for (i = 0; i < num; i++) if (ceph_osd_is_up(osdmap, osds[i])) acting[o++] = osds[i]; return o; } /* * Return primary osd for given pgid, or -1 if none. */ int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid) { int rawosds[CEPH_PG_MAX_SIZE], *osds; int i, num = CEPH_PG_MAX_SIZE; osds = calc_pg_raw(osdmap, pgid, rawosds, &num); if (!osds) return -1; /* primary is first up osd */ for (i = 0; i < num; i++) if (ceph_osd_is_up(osdmap, osds[i])) return osds[i]; return -1; } EXPORT_SYMBOL(ceph_calc_pg_primary);