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linux/net/ceph/osdmap.c

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// SPDX-License-Identifier: GPL-2.0
#include <linux/ceph/ceph_debug.h>
#include <linux/module.h>
#include <linux/slab.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, u32 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_8_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 crush_decode_straw2_bucket(void **p, void *end,
struct crush_bucket_straw2 *b)
{
int j;
dout("crush_decode_straw2_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;
ceph_decode_need(p, end, b->h.size * sizeof(u32), bad);
for (j = 0; j < b->h.size; j++)
b->item_weights[j] = ceph_decode_32(p);
return 0;
bad:
return -EINVAL;
}
static struct crush_choose_arg_map *alloc_choose_arg_map(void)
{
struct crush_choose_arg_map *arg_map;
arg_map = kzalloc(sizeof(*arg_map), GFP_NOIO);
if (!arg_map)
return NULL;
RB_CLEAR_NODE(&arg_map->node);
return arg_map;
}
static void free_choose_arg_map(struct crush_choose_arg_map *arg_map)
{
if (arg_map) {
int i, j;
WARN_ON(!RB_EMPTY_NODE(&arg_map->node));
for (i = 0; i < arg_map->size; i++) {
struct crush_choose_arg *arg = &arg_map->args[i];
for (j = 0; j < arg->weight_set_size; j++)
kfree(arg->weight_set[j].weights);
kfree(arg->weight_set);
kfree(arg->ids);
}
kfree(arg_map->args);
kfree(arg_map);
}
}
DEFINE_RB_FUNCS(choose_arg_map, struct crush_choose_arg_map, choose_args_index,
node);
void clear_choose_args(struct crush_map *c)
{
while (!RB_EMPTY_ROOT(&c->choose_args)) {
struct crush_choose_arg_map *arg_map =
rb_entry(rb_first(&c->choose_args),
struct crush_choose_arg_map, node);
erase_choose_arg_map(&c->choose_args, arg_map);
free_choose_arg_map(arg_map);
}
}
static u32 *decode_array_32_alloc(void **p, void *end, u32 *plen)
{
u32 *a = NULL;
u32 len;
int ret;
ceph_decode_32_safe(p, end, len, e_inval);
if (len) {
u32 i;
a = kmalloc_array(len, sizeof(u32), GFP_NOIO);
if (!a) {
ret = -ENOMEM;
goto fail;
}
ceph_decode_need(p, end, len * sizeof(u32), e_inval);
for (i = 0; i < len; i++)
a[i] = ceph_decode_32(p);
}
*plen = len;
return a;
e_inval:
ret = -EINVAL;
fail:
kfree(a);
return ERR_PTR(ret);
}
/*
* Assumes @arg is zero-initialized.
*/
static int decode_choose_arg(void **p, void *end, struct crush_choose_arg *arg)
{
int ret;
ceph_decode_32_safe(p, end, arg->weight_set_size, e_inval);
if (arg->weight_set_size) {
u32 i;
arg->weight_set = kmalloc_array(arg->weight_set_size,
sizeof(*arg->weight_set),
GFP_NOIO);
if (!arg->weight_set)
return -ENOMEM;
for (i = 0; i < arg->weight_set_size; i++) {
struct crush_weight_set *w = &arg->weight_set[i];
w->weights = decode_array_32_alloc(p, end, &w->size);
if (IS_ERR(w->weights)) {
ret = PTR_ERR(w->weights);
w->weights = NULL;
return ret;
}
}
}
arg->ids = decode_array_32_alloc(p, end, &arg->ids_size);
if (IS_ERR(arg->ids)) {
ret = PTR_ERR(arg->ids);
arg->ids = NULL;
return ret;
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_choose_args(void **p, void *end, struct crush_map *c)
{
struct crush_choose_arg_map *arg_map = NULL;
u32 num_choose_arg_maps, num_buckets;
int ret;
ceph_decode_32_safe(p, end, num_choose_arg_maps, e_inval);
while (num_choose_arg_maps--) {
arg_map = alloc_choose_arg_map();
if (!arg_map) {
ret = -ENOMEM;
goto fail;
}
ceph_decode_64_safe(p, end, arg_map->choose_args_index,
e_inval);
arg_map->size = c->max_buckets;
arg_map->args = kcalloc(arg_map->size, sizeof(*arg_map->args),
GFP_NOIO);
if (!arg_map->args) {
ret = -ENOMEM;
goto fail;
}
ceph_decode_32_safe(p, end, num_buckets, e_inval);
while (num_buckets--) {
struct crush_choose_arg *arg;
u32 bucket_index;
ceph_decode_32_safe(p, end, bucket_index, e_inval);
if (bucket_index >= arg_map->size)
goto e_inval;
arg = &arg_map->args[bucket_index];
ret = decode_choose_arg(p, end, arg);
if (ret)
goto fail;
if (arg->ids_size &&
arg->ids_size != c->buckets[bucket_index]->size)
goto e_inval;
}
insert_choose_arg_map(&c->choose_args, arg_map);
}
return 0;
e_inval:
ret = -EINVAL;
fail:
free_choose_arg_map(arg_map);
return ret;
}
static void crush_finalize(struct crush_map *c)
{
__s32 b;
/* Space for the array of pointers to per-bucket workspace */
c->working_size = sizeof(struct crush_work) +
c->max_buckets * sizeof(struct crush_work_bucket *);
for (b = 0; b < c->max_buckets; b++) {
if (!c->buckets[b])
continue;
switch (c->buckets[b]->alg) {
default:
/*
* The base case, permutation variables and
* the pointer to the permutation array.
*/
c->working_size += sizeof(struct crush_work_bucket);
break;
}
/* Every bucket has a permutation array. */
c->working_size += c->buckets[b]->size * sizeof(__u32);
}
}
static struct crush_map *crush_decode(void *pbyval, void *end)
{
struct crush_map *c;
int err;
int i, j;
void **p = &pbyval;
void *start = pbyval;
u32 magic;
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);
c->choose_args = RB_ROOT;
/* 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;
case CRUSH_BUCKET_STRAW2:
size = sizeof(struct crush_bucket_straw2);
break;
default:
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;
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 fail;
break;
case CRUSH_BUCKET_LIST:
err = crush_decode_list_bucket(p, end,
(struct crush_bucket_list *)b);
if (err < 0)
goto fail;
break;
case CRUSH_BUCKET_TREE:
err = crush_decode_tree_bucket(p, end,
(struct crush_bucket_tree *)b);
if (err < 0)
goto fail;
break;
case CRUSH_BUCKET_STRAW:
err = crush_decode_straw_bucket(p, end,
(struct crush_bucket_straw *)b);
if (err < 0)
goto fail;
break;
case CRUSH_BUCKET_STRAW2:
err = crush_decode_straw2_bucket(p, end,
(struct crush_bucket_straw2 *)b);
if (err < 0)
goto fail;
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
if (yes > (ULONG_MAX - sizeof(*r))
/ sizeof(struct crush_rule_step))
goto bad;
#endif
r = kmalloc(struct_size(r, steps, yes), GFP_NOFS);
c->rules[i] = r;
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);
}
}
ceph_decode_skip_map(p, end, 32, string, bad); /* type_map */
ceph_decode_skip_map(p, end, 32, string, bad); /* name_map */
ceph_decode_skip_map(p, end, 32, string, bad); /* rule_name_map */
/* 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\n",
c->choose_local_tries);
dout("crush decode tunable choose_local_fallback_tries = %d\n",
c->choose_local_fallback_tries);
dout("crush decode tunable choose_total_tries = %d\n",
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\n",
c->chooseleaf_descend_once);
ceph_decode_need(p, end, sizeof(u8), done);
c->chooseleaf_vary_r = ceph_decode_8(p);
dout("crush decode tunable chooseleaf_vary_r = %d\n",
c->chooseleaf_vary_r);
/* skip straw_calc_version, allowed_bucket_algs */
ceph_decode_need(p, end, sizeof(u8) + sizeof(u32), done);
*p += sizeof(u8) + sizeof(u32);
ceph_decode_need(p, end, sizeof(u8), done);
c->chooseleaf_stable = ceph_decode_8(p);
dout("crush decode tunable chooseleaf_stable = %d\n",
c->chooseleaf_stable);
if (*p != end) {
/* class_map */
ceph_decode_skip_map(p, end, 32, 32, bad);
/* class_name */
ceph_decode_skip_map(p, end, 32, string, bad);
/* class_bucket */
ceph_decode_skip_map_of_map(p, end, 32, 32, 32, bad);
}
if (*p != end) {
err = decode_choose_args(p, end, c);
if (err)
goto fail;
}
done:
crush_finalize(c);
dout("crush_decode success\n");
return c;
badmem:
err = -ENOMEM;
fail:
dout("crush_decode fail %d\n", err);
crush_destroy(c);
return ERR_PTR(err);
bad:
err = -EINVAL;
goto fail;
}
int ceph_pg_compare(const struct ceph_pg *lhs, const struct ceph_pg *rhs)
{
if (lhs->pool < rhs->pool)
return -1;
if (lhs->pool > rhs->pool)
return 1;
if (lhs->seed < rhs->seed)
return -1;
if (lhs->seed > rhs->seed)
return 1;
return 0;
}
int ceph_spg_compare(const struct ceph_spg *lhs, const struct ceph_spg *rhs)
{
int ret;
ret = ceph_pg_compare(&lhs->pgid, &rhs->pgid);
if (ret)
return ret;
if (lhs->shard < rhs->shard)
return -1;
if (lhs->shard > rhs->shard)
return 1;
return 0;
}
static struct ceph_pg_mapping *alloc_pg_mapping(size_t payload_len)
{
struct ceph_pg_mapping *pg;
pg = kmalloc(sizeof(*pg) + payload_len, GFP_NOIO);
if (!pg)
return NULL;
RB_CLEAR_NODE(&pg->node);
return pg;
}
static void free_pg_mapping(struct ceph_pg_mapping *pg)
{
WARN_ON(!RB_EMPTY_NODE(&pg->node));
kfree(pg);
}
/*
* rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
* to a set of osds) and primary_temp (explicit primary setting)
*/
DEFINE_RB_FUNCS2(pg_mapping, struct ceph_pg_mapping, pgid, ceph_pg_compare,
RB_BYPTR, const struct ceph_pg *, node)
/*
* 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;
}
struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
{
return __lookup_pg_pool(&map->pg_pools, id);
}
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_warn("got v %d < 5 cv %d of ceph_pg_pool\n", ev, cv);
return -EINVAL;
}
if (cv > 9) {
pr_warn("got v %d cv %d > 9 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);
*p += 4; /* skip crash_replay_interval */
if (ev >= 7)
pi->min_size = ceph_decode_8(p);
else
pi->min_size = pi->size - pi->size / 2;
if (ev >= 8)
*p += 8 + 8; /* skip quota_max_* */
if (ev >= 9) {
/* skip tiers */
num = ceph_decode_32(p);
*p += num * 8;
*p += 8; /* skip tier_of */
*p += 1; /* skip cache_mode */
pi->read_tier = ceph_decode_64(p);
pi->write_tier = ceph_decode_64(p);
} else {
pi->read_tier = -1;
pi->write_tier = -1;
}
if (ev >= 10) {
/* skip properties */
num = ceph_decode_32(p);
while (num--) {
len = ceph_decode_32(p);
*p += len; /* key */
len = ceph_decode_32(p);
*p += len; /* val */
}
}
if (ev >= 11) {
/* skip hit_set_params */
*p += 1 + 1; /* versions */
len = ceph_decode_32(p);
*p += len;
*p += 4; /* skip hit_set_period */
*p += 4; /* skip hit_set_count */
}
if (ev >= 12)
*p += 4; /* skip stripe_width */
if (ev >= 13) {
*p += 8; /* skip target_max_bytes */
*p += 8; /* skip target_max_objects */
*p += 4; /* skip cache_target_dirty_ratio_micro */
*p += 4; /* skip cache_target_full_ratio_micro */
*p += 4; /* skip cache_min_flush_age */
*p += 4; /* skip cache_min_evict_age */
}
if (ev >= 14) {
/* skip erasure_code_profile */
len = ceph_decode_32(p);
*p += len;
}
/*
* last_force_op_resend_preluminous, will be overridden if the
* map was encoded with RESEND_ON_SPLIT
*/
if (ev >= 15)
pi->last_force_request_resend = ceph_decode_32(p);
else
pi->last_force_request_resend = 0;
if (ev >= 16)
*p += 4; /* skip min_read_recency_for_promote */
if (ev >= 17)
*p += 8; /* skip expected_num_objects */
if (ev >= 19)
*p += 4; /* skip cache_target_dirty_high_ratio_micro */
if (ev >= 20)
*p += 4; /* skip min_write_recency_for_promote */
if (ev >= 21)
*p += 1; /* skip use_gmt_hitset */
if (ev >= 22)
*p += 1; /* skip fast_read */
if (ev >= 23) {
*p += 4; /* skip hit_set_grade_decay_rate */
*p += 4; /* skip hit_set_search_last_n */
}
if (ev >= 24) {
/* skip opts */
*p += 1 + 1; /* versions */
len = ceph_decode_32(p);
*p += len;
}
if (ev >= 25)
pi->last_force_request_resend = ceph_decode_32(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
*/
struct ceph_osdmap *ceph_osdmap_alloc(void)
{
struct ceph_osdmap *map;
map = kzalloc(sizeof(*map), GFP_NOIO);
if (!map)
return NULL;
map->pg_pools = RB_ROOT;
map->pool_max = -1;
map->pg_temp = RB_ROOT;
map->primary_temp = RB_ROOT;
map->pg_upmap = RB_ROOT;
map->pg_upmap_items = RB_ROOT;
mutex_init(&map->crush_workspace_mutex);
return 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);
erase_pg_mapping(&map->pg_temp, pg);
free_pg_mapping(pg);
}
while (!RB_EMPTY_ROOT(&map->primary_temp)) {
struct ceph_pg_mapping *pg =
rb_entry(rb_first(&map->primary_temp),
struct ceph_pg_mapping, node);
erase_pg_mapping(&map->primary_temp, pg);
free_pg_mapping(pg);
}
while (!RB_EMPTY_ROOT(&map->pg_upmap)) {
struct ceph_pg_mapping *pg =
rb_entry(rb_first(&map->pg_upmap),
struct ceph_pg_mapping, node);
rb_erase(&pg->node, &map->pg_upmap);
kfree(pg);
}
while (!RB_EMPTY_ROOT(&map->pg_upmap_items)) {
struct ceph_pg_mapping *pg =
rb_entry(rb_first(&map->pg_upmap_items),
struct ceph_pg_mapping, node);
rb_erase(&pg->node, &map->pg_upmap_items);
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);
}
kvfree(map->osd_state);
kvfree(map->osd_weight);
kvfree(map->osd_addr);
kvfree(map->osd_primary_affinity);
kvfree(map->crush_workspace);
kfree(map);
}
/*
* Adjust max_osd value, (re)allocate arrays.
*
* The new elements are properly initialized.
*/
static int osdmap_set_max_osd(struct ceph_osdmap *map, u32 max)
{
u32 *state;
u32 *weight;
struct ceph_entity_addr *addr;
u32 to_copy;
int i;
dout("%s old %u new %u\n", __func__, map->max_osd, max);
if (max == map->max_osd)
return 0;
state = ceph_kvmalloc(array_size(max, sizeof(*state)), GFP_NOFS);
weight = ceph_kvmalloc(array_size(max, sizeof(*weight)), GFP_NOFS);
addr = ceph_kvmalloc(array_size(max, sizeof(*addr)), GFP_NOFS);
if (!state || !weight || !addr) {
kvfree(state);
kvfree(weight);
kvfree(addr);
return -ENOMEM;
}
to_copy = min(map->max_osd, max);
if (map->osd_state) {
memcpy(state, map->osd_state, to_copy * sizeof(*state));
memcpy(weight, map->osd_weight, to_copy * sizeof(*weight));
memcpy(addr, map->osd_addr, to_copy * sizeof(*addr));
kvfree(map->osd_state);
kvfree(map->osd_weight);
kvfree(map->osd_addr);
}
map->osd_state = state;
map->osd_weight = weight;
map->osd_addr = addr;
for (i = map->max_osd; i < max; i++) {
map->osd_state[i] = 0;
map->osd_weight[i] = CEPH_OSD_OUT;
memset(map->osd_addr + i, 0, sizeof(*map->osd_addr));
}
if (map->osd_primary_affinity) {
u32 *affinity;
affinity = ceph_kvmalloc(array_size(max, sizeof(*affinity)),
GFP_NOFS);
if (!affinity)
return -ENOMEM;
memcpy(affinity, map->osd_primary_affinity,
to_copy * sizeof(*affinity));
kvfree(map->osd_primary_affinity);
map->osd_primary_affinity = affinity;
for (i = map->max_osd; i < max; i++)
map->osd_primary_affinity[i] =
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
}
map->max_osd = max;
return 0;
}
static int osdmap_set_crush(struct ceph_osdmap *map, struct crush_map *crush)
{
void *workspace;
size_t work_size;
if (IS_ERR(crush))
return PTR_ERR(crush);
work_size = crush_work_size(crush, CEPH_PG_MAX_SIZE);
dout("%s work_size %zu bytes\n", __func__, work_size);
workspace = ceph_kvmalloc(work_size, GFP_NOIO);
if (!workspace) {
crush_destroy(crush);
return -ENOMEM;
}
crush_init_workspace(crush, workspace);
if (map->crush)
crush_destroy(map->crush);
kvfree(map->crush_workspace);
map->crush = crush;
map->crush_workspace = workspace;
return 0;
}
#define OSDMAP_WRAPPER_COMPAT_VER 7
#define OSDMAP_CLIENT_DATA_COMPAT_VER 1
/*
* Return 0 or error. On success, *v is set to 0 for old (v6) osdmaps,
* to struct_v of the client_data section for new (v7 and above)
* osdmaps.
*/
static int get_osdmap_client_data_v(void **p, void *end,
const char *prefix, u8 *v)
{
u8 struct_v;
ceph_decode_8_safe(p, end, struct_v, e_inval);
if (struct_v >= 7) {
u8 struct_compat;
ceph_decode_8_safe(p, end, struct_compat, e_inval);
if (struct_compat > OSDMAP_WRAPPER_COMPAT_VER) {
pr_warn("got v %d cv %d > %d of %s ceph_osdmap\n",
struct_v, struct_compat,
OSDMAP_WRAPPER_COMPAT_VER, prefix);
return -EINVAL;
}
*p += 4; /* ignore wrapper struct_len */
ceph_decode_8_safe(p, end, struct_v, e_inval);
ceph_decode_8_safe(p, end, struct_compat, e_inval);
if (struct_compat > OSDMAP_CLIENT_DATA_COMPAT_VER) {
pr_warn("got v %d cv %d > %d of %s ceph_osdmap client data\n",
struct_v, struct_compat,
OSDMAP_CLIENT_DATA_COMPAT_VER, prefix);
return -EINVAL;
}
*p += 4; /* ignore client data struct_len */
} else {
u16 version;
*p -= 1;
ceph_decode_16_safe(p, end, version, e_inval);
if (version < 6) {
pr_warn("got v %d < 6 of %s ceph_osdmap\n",
version, prefix);
return -EINVAL;
}
/* old osdmap enconding */
struct_v = 0;
}
*v = struct_v;
return 0;
e_inval:
return -EINVAL;
}
static int __decode_pools(void **p, void *end, struct ceph_osdmap *map,
bool incremental)
{
u32 n;
ceph_decode_32_safe(p, end, n, e_inval);
while (n--) {
struct ceph_pg_pool_info *pi;
u64 pool;
int ret;
ceph_decode_64_safe(p, end, pool, e_inval);
pi = __lookup_pg_pool(&map->pg_pools, pool);
if (!incremental || !pi) {
pi = kzalloc(sizeof(*pi), GFP_NOFS);
if (!pi)
return -ENOMEM;
pi->id = pool;
ret = __insert_pg_pool(&map->pg_pools, pi);
if (ret) {
kfree(pi);
return ret;
}
}
ret = decode_pool(p, end, pi);
if (ret)
return ret;
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_pools(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pools(p, end, map, false);
}
static int decode_new_pools(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pools(p, end, map, true);
}
typedef struct ceph_pg_mapping *(*decode_mapping_fn_t)(void **, void *, bool);
static int decode_pg_mapping(void **p, void *end, struct rb_root *mapping_root,
decode_mapping_fn_t fn, bool incremental)
{
u32 n;
WARN_ON(!incremental && !fn);
ceph_decode_32_safe(p, end, n, e_inval);
while (n--) {
struct ceph_pg_mapping *pg;
struct ceph_pg pgid;
int ret;
ret = ceph_decode_pgid(p, end, &pgid);
if (ret)
return ret;
pg = lookup_pg_mapping(mapping_root, &pgid);
if (pg) {
WARN_ON(!incremental);
erase_pg_mapping(mapping_root, pg);
free_pg_mapping(pg);
}
if (fn) {
pg = fn(p, end, incremental);
if (IS_ERR(pg))
return PTR_ERR(pg);
if (pg) {
pg->pgid = pgid; /* struct */
insert_pg_mapping(mapping_root, pg);
}
}
}
return 0;
e_inval:
return -EINVAL;
}
static struct ceph_pg_mapping *__decode_pg_temp(void **p, void *end,
bool incremental)
{
struct ceph_pg_mapping *pg;
u32 len, i;
ceph_decode_32_safe(p, end, len, e_inval);
if (len == 0 && incremental)
return NULL; /* new_pg_temp: [] to remove */
if (len > (SIZE_MAX - sizeof(*pg)) / sizeof(u32))
return ERR_PTR(-EINVAL);
ceph_decode_need(p, end, len * sizeof(u32), e_inval);
pg = alloc_pg_mapping(len * sizeof(u32));
if (!pg)
return ERR_PTR(-ENOMEM);
pg->pg_temp.len = len;
for (i = 0; i < len; i++)
pg->pg_temp.osds[i] = ceph_decode_32(p);
return pg;
e_inval:
return ERR_PTR(-EINVAL);
}
static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
false);
}
static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_temp, __decode_pg_temp,
true);
}
static struct ceph_pg_mapping *__decode_primary_temp(void **p, void *end,
bool incremental)
{
struct ceph_pg_mapping *pg;
u32 osd;
ceph_decode_32_safe(p, end, osd, e_inval);
if (osd == (u32)-1 && incremental)
return NULL; /* new_primary_temp: -1 to remove */
pg = alloc_pg_mapping(0);
if (!pg)
return ERR_PTR(-ENOMEM);
pg->primary_temp.osd = osd;
return pg;
e_inval:
return ERR_PTR(-EINVAL);
}
static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->primary_temp,
__decode_primary_temp, false);
}
static int decode_new_primary_temp(void **p, void *end,
struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->primary_temp,
__decode_primary_temp, true);
}
u32 ceph_get_primary_affinity(struct ceph_osdmap *map, int osd)
{
BUG_ON(osd >= map->max_osd);
if (!map->osd_primary_affinity)
return CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
return map->osd_primary_affinity[osd];
}
static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
{
BUG_ON(osd >= map->max_osd);
if (!map->osd_primary_affinity) {
int i;
map->osd_primary_affinity = ceph_kvmalloc(
array_size(map->max_osd, sizeof(*map->osd_primary_affinity)),
GFP_NOFS);
if (!map->osd_primary_affinity)
return -ENOMEM;
for (i = 0; i < map->max_osd; i++)
map->osd_primary_affinity[i] =
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY;
}
map->osd_primary_affinity[osd] = aff;
return 0;
}
static int decode_primary_affinity(void **p, void *end,
struct ceph_osdmap *map)
{
u32 len, i;
ceph_decode_32_safe(p, end, len, e_inval);
if (len == 0) {
kvfree(map->osd_primary_affinity);
map->osd_primary_affinity = NULL;
return 0;
}
if (len != map->max_osd)
goto e_inval;
ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
for (i = 0; i < map->max_osd; i++) {
int ret;
ret = set_primary_affinity(map, i, ceph_decode_32(p));
if (ret)
return ret;
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_new_primary_affinity(void **p, void *end,
struct ceph_osdmap *map)
{
u32 n;
ceph_decode_32_safe(p, end, n, e_inval);
while (n--) {
u32 osd, aff;
int ret;
ceph_decode_32_safe(p, end, osd, e_inval);
ceph_decode_32_safe(p, end, aff, e_inval);
ret = set_primary_affinity(map, osd, aff);
if (ret)
return ret;
pr_info("osd%d primary-affinity 0x%x\n", osd, aff);
}
return 0;
e_inval:
return -EINVAL;
}
static struct ceph_pg_mapping *__decode_pg_upmap(void **p, void *end,
bool __unused)
{
return __decode_pg_temp(p, end, false);
}
static int decode_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
false);
}
static int decode_new_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap, __decode_pg_upmap,
true);
}
static int decode_old_pg_upmap(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap, NULL, true);
}
static struct ceph_pg_mapping *__decode_pg_upmap_items(void **p, void *end,
bool __unused)
{
struct ceph_pg_mapping *pg;
u32 len, i;
ceph_decode_32_safe(p, end, len, e_inval);
if (len > (SIZE_MAX - sizeof(*pg)) / (2 * sizeof(u32)))
return ERR_PTR(-EINVAL);
ceph_decode_need(p, end, 2 * len * sizeof(u32), e_inval);
pg = alloc_pg_mapping(2 * len * sizeof(u32));
if (!pg)
return ERR_PTR(-ENOMEM);
pg->pg_upmap_items.len = len;
for (i = 0; i < len; i++) {
pg->pg_upmap_items.from_to[i][0] = ceph_decode_32(p);
pg->pg_upmap_items.from_to[i][1] = ceph_decode_32(p);
}
return pg;
e_inval:
return ERR_PTR(-EINVAL);
}
static int decode_pg_upmap_items(void **p, void *end, struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap_items,
__decode_pg_upmap_items, false);
}
static int decode_new_pg_upmap_items(void **p, void *end,
struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap_items,
__decode_pg_upmap_items, true);
}
static int decode_old_pg_upmap_items(void **p, void *end,
struct ceph_osdmap *map)
{
return decode_pg_mapping(p, end, &map->pg_upmap_items, NULL, true);
}
/*
* decode a full map.
*/
static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
{
u8 struct_v;
u32 epoch = 0;
void *start = *p;
u32 max;
u32 len, i;
int err;
dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
err = get_osdmap_client_data_v(p, end, "full", &struct_v);
if (err)
goto bad;
/* fsid, epoch, created, modified */
ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) +
sizeof(map->created) + sizeof(map->modified), e_inval);
ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
epoch = map->epoch = ceph_decode_32(p);
ceph_decode_copy(p, &map->created, sizeof(map->created));
ceph_decode_copy(p, &map->modified, sizeof(map->modified));
/* pools */
err = decode_pools(p, end, map);
if (err)
goto bad;
/* pool_name */
err = decode_pool_names(p, end, map);
if (err)
goto bad;
ceph_decode_32_safe(p, end, map->pool_max, e_inval);
ceph_decode_32_safe(p, end, map->flags, e_inval);
/* max_osd */
ceph_decode_32_safe(p, end, max, e_inval);
/* (re)alloc osd arrays */
err = osdmap_set_max_osd(map, max);
if (err)
goto bad;
/* osd_state, osd_weight, osd_addrs->client_addr */
ceph_decode_need(p, end, 3*sizeof(u32) +
map->max_osd*(struct_v >= 5 ? sizeof(u32) :
sizeof(u8)) +
sizeof(*map->osd_weight), e_inval);
if (ceph_decode_32(p) != map->max_osd)
goto e_inval;
if (struct_v >= 5) {
for (i = 0; i < map->max_osd; i++)
map->osd_state[i] = ceph_decode_32(p);
} else {
for (i = 0; i < map->max_osd; i++)
map->osd_state[i] = ceph_decode_8(p);
}
if (ceph_decode_32(p) != map->max_osd)
goto e_inval;
for (i = 0; i < map->max_osd; i++)
map->osd_weight[i] = ceph_decode_32(p);
if (ceph_decode_32(p) != map->max_osd)
goto e_inval;
for (i = 0; i < map->max_osd; i++) {
err = ceph_decode_entity_addr(p, end, &map->osd_addr[i]);
if (err)
goto bad;
}
/* pg_temp */
err = decode_pg_temp(p, end, map);
if (err)
goto bad;
/* primary_temp */
if (struct_v >= 1) {
err = decode_primary_temp(p, end, map);
if (err)
goto bad;
}
/* primary_affinity */
if (struct_v >= 2) {
err = decode_primary_affinity(p, end, map);
if (err)
goto bad;
} else {
WARN_ON(map->osd_primary_affinity);
}
/* crush */
ceph_decode_32_safe(p, end, len, e_inval);
err = osdmap_set_crush(map, crush_decode(*p, min(*p + len, end)));
if (err)
goto bad;
*p += len;
if (struct_v >= 3) {
/* erasure_code_profiles */
ceph_decode_skip_map_of_map(p, end, string, string, string,
e_inval);
}
if (struct_v >= 4) {
err = decode_pg_upmap(p, end, map);
if (err)
goto bad;
err = decode_pg_upmap_items(p, end, map);
if (err)
goto bad;
} else {
WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap));
WARN_ON(!RB_EMPTY_ROOT(&map->pg_upmap_items));
}
/* ignore the rest */
*p = end;
dout("full osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
return 0;
e_inval:
err = -EINVAL;
bad:
pr_err("corrupt full osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
err, epoch, (int)(*p - start), *p, start, end);
print_hex_dump(KERN_DEBUG, "osdmap: ",
DUMP_PREFIX_OFFSET, 16, 1,
start, end - start, true);
return err;
}
/*
* Allocate and decode a full map.
*/
struct ceph_osdmap *ceph_osdmap_decode(void **p, void *end)
{
struct ceph_osdmap *map;
int ret;
map = ceph_osdmap_alloc();
if (!map)
return ERR_PTR(-ENOMEM);
ret = osdmap_decode(p, end, map);
if (ret) {
ceph_osdmap_destroy(map);
return ERR_PTR(ret);
}
return map;
}
/*
* Encoding order is (new_up_client, new_state, new_weight). Need to
* apply in the (new_weight, new_state, new_up_client) order, because
* an incremental map may look like e.g.
*
* new_up_client: { osd=6, addr=... } # set osd_state and addr
* new_state: { osd=6, xorstate=EXISTS } # clear osd_state
*/
static int decode_new_up_state_weight(void **p, void *end, u8 struct_v,
struct ceph_osdmap *map)
{
void *new_up_client;
void *new_state;
void *new_weight_end;
u32 len;
int i;
new_up_client = *p;
ceph_decode_32_safe(p, end, len, e_inval);
for (i = 0; i < len; ++i) {
struct ceph_entity_addr addr;
ceph_decode_skip_32(p, end, e_inval);
if (ceph_decode_entity_addr(p, end, &addr))
goto e_inval;
}
new_state = *p;
ceph_decode_32_safe(p, end, len, e_inval);
len *= sizeof(u32) + (struct_v >= 5 ? sizeof(u32) : sizeof(u8));
ceph_decode_need(p, end, len, e_inval);
*p += len;
/* new_weight */
ceph_decode_32_safe(p, end, len, e_inval);
while (len--) {
s32 osd;
u32 w;
ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
osd = ceph_decode_32(p);
w = ceph_decode_32(p);
BUG_ON(osd >= map->max_osd);
pr_info("osd%d weight 0x%x %s\n", osd, w,
w == CEPH_OSD_IN ? "(in)" :
(w == CEPH_OSD_OUT ? "(out)" : ""));
map->osd_weight[osd] = w;
/*
* If we are marking in, set the EXISTS, and clear the
* AUTOOUT and NEW bits.
*/
if (w) {
map->osd_state[osd] |= CEPH_OSD_EXISTS;
map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
CEPH_OSD_NEW);
}
}
new_weight_end = *p;
/* new_state (up/down) */
*p = new_state;
len = ceph_decode_32(p);
while (len--) {
s32 osd;
u32 xorstate;
int ret;
osd = ceph_decode_32(p);
if (struct_v >= 5)
xorstate = ceph_decode_32(p);
else
xorstate = ceph_decode_8(p);
if (xorstate == 0)
xorstate = CEPH_OSD_UP;
BUG_ON(osd >= map->max_osd);
if ((map->osd_state[osd] & CEPH_OSD_UP) &&
(xorstate & CEPH_OSD_UP))
pr_info("osd%d down\n", osd);
if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
(xorstate & CEPH_OSD_EXISTS)) {
pr_info("osd%d does not exist\n", osd);
ret = set_primary_affinity(map, osd,
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY);
if (ret)
return ret;
memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
map->osd_state[osd] = 0;
} else {
map->osd_state[osd] ^= xorstate;
}
}
/* new_up_client */
*p = new_up_client;
len = ceph_decode_32(p);
while (len--) {
s32 osd;
struct ceph_entity_addr addr;
osd = ceph_decode_32(p);
BUG_ON(osd >= map->max_osd);
if (ceph_decode_entity_addr(p, end, &addr))
goto e_inval;
pr_info("osd%d up\n", osd);
map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
map->osd_addr[osd] = addr;
}
*p = new_weight_end;
return 0;
e_inval:
return -EINVAL;
}
/*
* decode and apply an incremental map update.
*/
struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
struct ceph_osdmap *map)
{
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;
u8 struct_v;
dout("%s %p to %p len %d\n", __func__, *p, end, (int)(end - *p));
err = get_osdmap_client_data_v(p, end, "inc", &struct_v);
if (err)
goto bad;
/* fsid, epoch, modified, new_pool_max, new_flags */
ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) +
sizeof(u64) + sizeof(u32), e_inval);
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, e_inval);
if (len > 0) {
dout("apply_incremental full map len %d, %p to %p\n",
len, *p, end);
return ceph_osdmap_decode(p, min(*p+len, end));
}
/* new crush? */
ceph_decode_32_safe(p, end, len, e_inval);
if (len > 0) {
err = osdmap_set_crush(map,
crush_decode(*p, min(*p + len, end)));
if (err)
goto bad;
*p += len;
}
/* new flags? */
if (new_flags >= 0)
map->flags = new_flags;
if (new_pool_max >= 0)
map->pool_max = new_pool_max;
/* new max? */
ceph_decode_32_safe(p, end, max, e_inval);
if (max >= 0) {
err = osdmap_set_max_osd(map, max);
if (err)
goto bad;
}
map->epoch++;
map->modified = modified;
/* new_pools */
err = decode_new_pools(p, end, map);
if (err)
goto bad;
/* new_pool_names */
err = decode_pool_names(p, end, map);
if (err)
goto bad;
/* old_pool */
ceph_decode_32_safe(p, end, len, e_inval);
while (len--) {
struct ceph_pg_pool_info *pi;
ceph_decode_64_safe(p, end, pool, e_inval);
pi = __lookup_pg_pool(&map->pg_pools, pool);
if (pi)
__remove_pg_pool(&map->pg_pools, pi);
}
/* new_up_client, new_state, new_weight */
err = decode_new_up_state_weight(p, end, struct_v, map);
if (err)
goto bad;
/* new_pg_temp */
err = decode_new_pg_temp(p, end, map);
if (err)
goto bad;
/* new_primary_temp */
if (struct_v >= 1) {
err = decode_new_primary_temp(p, end, map);
if (err)
goto bad;
}
/* new_primary_affinity */
if (struct_v >= 2) {
err = decode_new_primary_affinity(p, end, map);
if (err)
goto bad;
}
if (struct_v >= 3) {
/* new_erasure_code_profiles */
ceph_decode_skip_map_of_map(p, end, string, string, string,
e_inval);
/* old_erasure_code_profiles */
ceph_decode_skip_set(p, end, string, e_inval);
}
if (struct_v >= 4) {
err = decode_new_pg_upmap(p, end, map);
if (err)
goto bad;
err = decode_old_pg_upmap(p, end, map);
if (err)
goto bad;
err = decode_new_pg_upmap_items(p, end, map);
if (err)
goto bad;
err = decode_old_pg_upmap_items(p, end, map);
if (err)
goto bad;
}
/* ignore the rest */
*p = end;
dout("inc osdmap epoch %d max_osd %d\n", map->epoch, map->max_osd);
return map;
e_inval:
err = -EINVAL;
bad:
pr_err("corrupt inc osdmap (%d) epoch %d off %d (%p of %p-%p)\n",
err, epoch, (int)(*p - start), *p, start, end);
print_hex_dump(KERN_DEBUG, "osdmap: ",
DUMP_PREFIX_OFFSET, 16, 1,
start, end - start, true);
return ERR_PTR(err);
}
void ceph_oloc_copy(struct ceph_object_locator *dest,
const struct ceph_object_locator *src)
{
ceph_oloc_destroy(dest);
dest->pool = src->pool;
if (src->pool_ns)
dest->pool_ns = ceph_get_string(src->pool_ns);
else
dest->pool_ns = NULL;
}
EXPORT_SYMBOL(ceph_oloc_copy);
void ceph_oloc_destroy(struct ceph_object_locator *oloc)
{
ceph_put_string(oloc->pool_ns);
}
EXPORT_SYMBOL(ceph_oloc_destroy);
void ceph_oid_copy(struct ceph_object_id *dest,
const struct ceph_object_id *src)
{
ceph_oid_destroy(dest);
if (src->name != src->inline_name) {
/* very rare, see ceph_object_id definition */
dest->name = kmalloc(src->name_len + 1,
GFP_NOIO | __GFP_NOFAIL);
} else {
dest->name = dest->inline_name;
}
memcpy(dest->name, src->name, src->name_len + 1);
dest->name_len = src->name_len;
}
EXPORT_SYMBOL(ceph_oid_copy);
static __printf(2, 0)
int oid_printf_vargs(struct ceph_object_id *oid, const char *fmt, va_list ap)
{
int len;
WARN_ON(!ceph_oid_empty(oid));
len = vsnprintf(oid->inline_name, sizeof(oid->inline_name), fmt, ap);
if (len >= sizeof(oid->inline_name))
return len;
oid->name_len = len;
return 0;
}
/*
* If oid doesn't fit into inline buffer, BUG.
*/
void ceph_oid_printf(struct ceph_object_id *oid, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
BUG_ON(oid_printf_vargs(oid, fmt, ap));
va_end(ap);
}
EXPORT_SYMBOL(ceph_oid_printf);
static __printf(3, 0)
int oid_aprintf_vargs(struct ceph_object_id *oid, gfp_t gfp,
const char *fmt, va_list ap)
{
va_list aq;
int len;
va_copy(aq, ap);
len = oid_printf_vargs(oid, fmt, aq);
va_end(aq);
if (len) {
char *external_name;
external_name = kmalloc(len + 1, gfp);
if (!external_name)
return -ENOMEM;
oid->name = external_name;
WARN_ON(vsnprintf(oid->name, len + 1, fmt, ap) != len);
oid->name_len = len;
}
return 0;
}
/*
* If oid doesn't fit into inline buffer, allocate.
*/
int ceph_oid_aprintf(struct ceph_object_id *oid, gfp_t gfp,
const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = oid_aprintf_vargs(oid, gfp, fmt, ap);
va_end(ap);
return ret;
}
EXPORT_SYMBOL(ceph_oid_aprintf);
void ceph_oid_destroy(struct ceph_object_id *oid)
{
if (oid->name != oid->inline_name)
kfree(oid->name);
}
EXPORT_SYMBOL(ceph_oid_destroy);
/*
* osds only
*/
static bool __osds_equal(const struct ceph_osds *lhs,
const struct ceph_osds *rhs)
{
if (lhs->size == rhs->size &&
!memcmp(lhs->osds, rhs->osds, rhs->size * sizeof(rhs->osds[0])))
return true;
return false;
}
/*
* osds + primary
*/
static bool osds_equal(const struct ceph_osds *lhs,
const struct ceph_osds *rhs)
{
if (__osds_equal(lhs, rhs) &&
lhs->primary == rhs->primary)
return true;
return false;
}
static bool osds_valid(const struct ceph_osds *set)
{
/* non-empty set */
if (set->size > 0 && set->primary >= 0)
return true;
/* empty can_shift_osds set */
if (!set->size && set->primary == -1)
return true;
/* empty !can_shift_osds set - all NONE */
if (set->size > 0 && set->primary == -1) {
int i;
for (i = 0; i < set->size; i++) {
if (set->osds[i] != CRUSH_ITEM_NONE)
break;
}
if (i == set->size)
return true;
}
return false;
}
void ceph_osds_copy(struct ceph_osds *dest, const struct ceph_osds *src)
{
memcpy(dest->osds, src->osds, src->size * sizeof(src->osds[0]));
dest->size = src->size;
dest->primary = src->primary;
}
bool ceph_pg_is_split(const struct ceph_pg *pgid, u32 old_pg_num,
u32 new_pg_num)
{
int old_bits = calc_bits_of(old_pg_num);
int old_mask = (1 << old_bits) - 1;
int n;
WARN_ON(pgid->seed >= old_pg_num);
if (new_pg_num <= old_pg_num)
return false;
for (n = 1; ; n++) {
int next_bit = n << (old_bits - 1);
u32 s = next_bit | pgid->seed;
if (s < old_pg_num || s == pgid->seed)
continue;
if (s >= new_pg_num)
break;
s = ceph_stable_mod(s, old_pg_num, old_mask);
if (s == pgid->seed)
return true;
}
return false;
}
bool ceph_is_new_interval(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
const struct ceph_osds *old_up,
const struct ceph_osds *new_up,
int old_size,
int new_size,
int old_min_size,
int new_min_size,
u32 old_pg_num,
u32 new_pg_num,
bool old_sort_bitwise,
bool new_sort_bitwise,
bool old_recovery_deletes,
bool new_recovery_deletes,
const struct ceph_pg *pgid)
{
return !osds_equal(old_acting, new_acting) ||
!osds_equal(old_up, new_up) ||
old_size != new_size ||
old_min_size != new_min_size ||
ceph_pg_is_split(pgid, old_pg_num, new_pg_num) ||
old_sort_bitwise != new_sort_bitwise ||
old_recovery_deletes != new_recovery_deletes;
}
static int calc_pg_rank(int osd, const struct ceph_osds *acting)
{
int i;
for (i = 0; i < acting->size; i++) {
if (acting->osds[i] == osd)
return i;
}
return -1;
}
static bool primary_changed(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting)
{
if (!old_acting->size && !new_acting->size)
return false; /* both still empty */
if (!old_acting->size ^ !new_acting->size)
return true; /* was empty, now not, or vice versa */
if (old_acting->primary != new_acting->primary)
return true; /* primary changed */
if (calc_pg_rank(old_acting->primary, old_acting) !=
calc_pg_rank(new_acting->primary, new_acting))
return true;
return false; /* same primary (tho replicas may have changed) */
}
bool ceph_osds_changed(const struct ceph_osds *old_acting,
const struct ceph_osds *new_acting,
bool any_change)
{
if (primary_changed(old_acting, new_acting))
return true;
if (any_change && !__osds_equal(old_acting, new_acting))
return true;
return false;
}
/*
* Map an object into a PG.
*
* Should only be called with target_oid and target_oloc (as opposed to
* base_oid and base_oloc), since tiering isn't taken into account.
*/
void __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi,
const struct ceph_object_id *oid,
const struct ceph_object_locator *oloc,
struct ceph_pg *raw_pgid)
{
WARN_ON(pi->id != oloc->pool);
if (!oloc->pool_ns) {
raw_pgid->pool = oloc->pool;
raw_pgid->seed = ceph_str_hash(pi->object_hash, oid->name,
oid->name_len);
dout("%s %s -> raw_pgid %llu.%x\n", __func__, oid->name,
raw_pgid->pool, raw_pgid->seed);
} else {
char stack_buf[256];
char *buf = stack_buf;
int nsl = oloc->pool_ns->len;
size_t total = nsl + 1 + oid->name_len;
if (total > sizeof(stack_buf))
buf = kmalloc(total, GFP_NOIO | __GFP_NOFAIL);
memcpy(buf, oloc->pool_ns->str, nsl);
buf[nsl] = '\037';
memcpy(buf + nsl + 1, oid->name, oid->name_len);
raw_pgid->pool = oloc->pool;
raw_pgid->seed = ceph_str_hash(pi->object_hash, buf, total);
if (buf != stack_buf)
kfree(buf);
dout("%s %s ns %.*s -> raw_pgid %llu.%x\n", __func__,
oid->name, nsl, oloc->pool_ns->str,
raw_pgid->pool, raw_pgid->seed);
}
}
int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
const struct ceph_object_id *oid,
const struct ceph_object_locator *oloc,
struct ceph_pg *raw_pgid)
{
struct ceph_pg_pool_info *pi;
pi = ceph_pg_pool_by_id(osdmap, oloc->pool);
if (!pi)
return -ENOENT;
__ceph_object_locator_to_pg(pi, oid, oloc, raw_pgid);
return 0;
}
EXPORT_SYMBOL(ceph_object_locator_to_pg);
/*
* Map a raw PG (full precision ps) into an actual PG.
*/
static void raw_pg_to_pg(struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_pg *pgid)
{
pgid->pool = raw_pgid->pool;
pgid->seed = ceph_stable_mod(raw_pgid->seed, pi->pg_num,
pi->pg_num_mask);
}
/*
* Map a raw PG (full precision ps) into a placement ps (placement
* seed). Include pool id in that value so that different pools don't
* use the same seeds.
*/
static u32 raw_pg_to_pps(struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid)
{
if (pi->flags & CEPH_POOL_FLAG_HASHPSPOOL) {
/* hash pool id and seed so that pool PGs do not overlap */
return crush_hash32_2(CRUSH_HASH_RJENKINS1,
ceph_stable_mod(raw_pgid->seed,
pi->pgp_num,
pi->pgp_num_mask),
raw_pgid->pool);
} else {
/*
* legacy behavior: 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 == ...
*/
return ceph_stable_mod(raw_pgid->seed, pi->pgp_num,
pi->pgp_num_mask) +
(unsigned)raw_pgid->pool;
}
}
/*
* Magic value used for a "default" fallback choose_args, used if the
* crush_choose_arg_map passed to do_crush() does not exist. If this
* also doesn't exist, fall back to canonical weights.
*/
#define CEPH_DEFAULT_CHOOSE_ARGS -1
static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
int *result, int result_max,
const __u32 *weight, int weight_max,
s64 choose_args_index)
{
struct crush_choose_arg_map *arg_map;
int r;
BUG_ON(result_max > CEPH_PG_MAX_SIZE);
arg_map = lookup_choose_arg_map(&map->crush->choose_args,
choose_args_index);
if (!arg_map)
arg_map = lookup_choose_arg_map(&map->crush->choose_args,
CEPH_DEFAULT_CHOOSE_ARGS);
mutex_lock(&map->crush_workspace_mutex);
r = crush_do_rule(map->crush, ruleno, x, result, result_max,
weight, weight_max, map->crush_workspace,
arg_map ? arg_map->args : NULL);
mutex_unlock(&map->crush_workspace_mutex);
return r;
}
static void remove_nonexistent_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
struct ceph_osds *set)
{
int i;
if (ceph_can_shift_osds(pi)) {
int removed = 0;
/* shift left */
for (i = 0; i < set->size; i++) {
if (!ceph_osd_exists(osdmap, set->osds[i])) {
removed++;
continue;
}
if (removed)
set->osds[i - removed] = set->osds[i];
}
set->size -= removed;
} else {
/* set dne devices to NONE */
for (i = 0; i < set->size; i++) {
if (!ceph_osd_exists(osdmap, set->osds[i]))
set->osds[i] = CRUSH_ITEM_NONE;
}
}
}
/*
* Calculate raw set (CRUSH output) for given PG and filter out
* nonexistent OSDs. ->primary is undefined for a raw set.
*
* Placement seed (CRUSH input) is returned through @ppps.
*/
static void pg_to_raw_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_osds *raw,
u32 *ppps)
{
u32 pps = raw_pg_to_pps(pi, raw_pgid);
int ruleno;
int len;
ceph_osds_init(raw);
if (ppps)
*ppps = pps;
ruleno = crush_find_rule(osdmap->crush, pi->crush_ruleset, pi->type,
pi->size);
if (ruleno < 0) {
pr_err("no crush rule: pool %lld ruleset %d type %d size %d\n",
pi->id, pi->crush_ruleset, pi->type, pi->size);
return;
}
if (pi->size > ARRAY_SIZE(raw->osds)) {
pr_err_ratelimited("pool %lld ruleset %d type %d too wide: size %d > %zu\n",
pi->id, pi->crush_ruleset, pi->type, pi->size,
ARRAY_SIZE(raw->osds));
return;
}
len = do_crush(osdmap, ruleno, pps, raw->osds, pi->size,
osdmap->osd_weight, osdmap->max_osd, pi->id);
if (len < 0) {
pr_err("error %d from crush rule %d: pool %lld ruleset %d type %d size %d\n",
len, ruleno, pi->id, pi->crush_ruleset, pi->type,
pi->size);
return;
}
raw->size = len;
remove_nonexistent_osds(osdmap, pi, raw);
}
/* apply pg_upmap[_items] mappings */
static void apply_upmap(struct ceph_osdmap *osdmap,
const struct ceph_pg *pgid,
struct ceph_osds *raw)
{
struct ceph_pg_mapping *pg;
int i, j;
pg = lookup_pg_mapping(&osdmap->pg_upmap, pgid);
if (pg) {
/* make sure targets aren't marked out */
for (i = 0; i < pg->pg_upmap.len; i++) {
int osd = pg->pg_upmap.osds[i];
if (osd != CRUSH_ITEM_NONE &&
osd < osdmap->max_osd &&
osdmap->osd_weight[osd] == 0) {
/* reject/ignore explicit mapping */
return;
}
}
for (i = 0; i < pg->pg_upmap.len; i++)
raw->osds[i] = pg->pg_upmap.osds[i];
raw->size = pg->pg_upmap.len;
/* check and apply pg_upmap_items, if any */
}
pg = lookup_pg_mapping(&osdmap->pg_upmap_items, pgid);
if (pg) {
/*
* Note: this approach does not allow a bidirectional swap,
* e.g., [[1,2],[2,1]] applied to [0,1,2] -> [0,2,1].
*/
for (i = 0; i < pg->pg_upmap_items.len; i++) {
int from = pg->pg_upmap_items.from_to[i][0];
int to = pg->pg_upmap_items.from_to[i][1];
int pos = -1;
bool exists = false;
/* make sure replacement doesn't already appear */
for (j = 0; j < raw->size; j++) {
int osd = raw->osds[j];
if (osd == to) {
exists = true;
break;
}
/* ignore mapping if target is marked out */
if (osd == from && pos < 0 &&
!(to != CRUSH_ITEM_NONE &&
to < osdmap->max_osd &&
osdmap->osd_weight[to] == 0)) {
pos = j;
}
}
if (!exists && pos >= 0)
raw->osds[pos] = to;
}
}
}
/*
* Given raw set, calculate up set and up primary. By definition of an
* up set, the result won't contain nonexistent or down OSDs.
*
* This is done in-place - on return @set is the up set. If it's
* empty, ->primary will remain undefined.
*/
static void raw_to_up_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
struct ceph_osds *set)
{
int i;
/* ->primary is undefined for a raw set */
BUG_ON(set->primary != -1);
if (ceph_can_shift_osds(pi)) {
int removed = 0;
/* shift left */
for (i = 0; i < set->size; i++) {
if (ceph_osd_is_down(osdmap, set->osds[i])) {
removed++;
continue;
}
if (removed)
set->osds[i - removed] = set->osds[i];
}
set->size -= removed;
if (set->size > 0)
set->primary = set->osds[0];
} else {
/* set down/dne devices to NONE */
for (i = set->size - 1; i >= 0; i--) {
if (ceph_osd_is_down(osdmap, set->osds[i]))
set->osds[i] = CRUSH_ITEM_NONE;
else
set->primary = set->osds[i];
}
}
}
static void apply_primary_affinity(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
u32 pps,
struct ceph_osds *up)
{
int i;
int pos = -1;
/*
* Do we have any non-default primary_affinity values for these
* osds?
*/
if (!osdmap->osd_primary_affinity)
return;
for (i = 0; i < up->size; i++) {
int osd = up->osds[i];
if (osd != CRUSH_ITEM_NONE &&
osdmap->osd_primary_affinity[osd] !=
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY) {
break;
}
}
if (i == up->size)
return;
/*
* Pick the primary. Feed both the seed (for the pg) and the
* osd into the hash/rng so that a proportional fraction of an
* osd's pgs get rejected as primary.
*/
for (i = 0; i < up->size; i++) {
int osd = up->osds[i];
u32 aff;
if (osd == CRUSH_ITEM_NONE)
continue;
aff = osdmap->osd_primary_affinity[osd];
if (aff < CEPH_OSD_MAX_PRIMARY_AFFINITY &&
(crush_hash32_2(CRUSH_HASH_RJENKINS1,
pps, osd) >> 16) >= aff) {
/*
* We chose not to use this primary. Note it
* anyway as a fallback in case we don't pick
* anyone else, but keep looking.
*/
if (pos < 0)
pos = i;
} else {
pos = i;
break;
}
}
if (pos < 0)
return;
up->primary = up->osds[pos];
if (ceph_can_shift_osds(pi) && pos > 0) {
/* move the new primary to the front */
for (i = pos; i > 0; i--)
up->osds[i] = up->osds[i - 1];
up->osds[0] = up->primary;
}
}
/*
* Get pg_temp and primary_temp mappings for given PG.
*
* Note that a PG may have none, only pg_temp, only primary_temp or
* both pg_temp and primary_temp mappings. This means @temp isn't
* always a valid OSD set on return: in the "only primary_temp" case,
* @temp will have its ->primary >= 0 but ->size == 0.
*/
static void get_temp_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *pgid,
struct ceph_osds *temp)
{
struct ceph_pg_mapping *pg;
int i;
ceph_osds_init(temp);
/* pg_temp? */
pg = lookup_pg_mapping(&osdmap->pg_temp, pgid);
if (pg) {
for (i = 0; i < pg->pg_temp.len; i++) {
if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
if (ceph_can_shift_osds(pi))
continue;
temp->osds[temp->size++] = CRUSH_ITEM_NONE;
} else {
temp->osds[temp->size++] = pg->pg_temp.osds[i];
}
}
/* apply pg_temp's primary */
for (i = 0; i < temp->size; i++) {
if (temp->osds[i] != CRUSH_ITEM_NONE) {
temp->primary = temp->osds[i];
break;
}
}
}
/* primary_temp? */
pg = lookup_pg_mapping(&osdmap->primary_temp, pgid);
if (pg)
temp->primary = pg->primary_temp.osd;
}
/*
* Map a PG to its acting set as well as its up set.
*
* Acting set is used for data mapping purposes, while up set can be
* recorded for detecting interval changes and deciding whether to
* resend a request.
*/
void ceph_pg_to_up_acting_osds(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_osds *up,
struct ceph_osds *acting)
{
struct ceph_pg pgid;
u32 pps;
WARN_ON(pi->id != raw_pgid->pool);
raw_pg_to_pg(pi, raw_pgid, &pgid);
pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
apply_upmap(osdmap, &pgid, up);
raw_to_up_osds(osdmap, pi, up);
apply_primary_affinity(osdmap, pi, pps, up);
get_temp_osds(osdmap, pi, &pgid, acting);
if (!acting->size) {
memcpy(acting->osds, up->osds, up->size * sizeof(up->osds[0]));
acting->size = up->size;
if (acting->primary == -1)
acting->primary = up->primary;
}
WARN_ON(!osds_valid(up) || !osds_valid(acting));
}
bool ceph_pg_to_primary_shard(struct ceph_osdmap *osdmap,
struct ceph_pg_pool_info *pi,
const struct ceph_pg *raw_pgid,
struct ceph_spg *spgid)
{
struct ceph_pg pgid;
struct ceph_osds up, acting;
int i;
WARN_ON(pi->id != raw_pgid->pool);
raw_pg_to_pg(pi, raw_pgid, &pgid);
if (ceph_can_shift_osds(pi)) {
spgid->pgid = pgid; /* struct */
spgid->shard = CEPH_SPG_NOSHARD;
return true;
}
ceph_pg_to_up_acting_osds(osdmap, pi, &pgid, &up, &acting);
for (i = 0; i < acting.size; i++) {
if (acting.osds[i] == acting.primary) {
spgid->pgid = pgid; /* struct */
spgid->shard = i;
return true;
}
}
return false;
}
/*
* Return acting primary for given PG, or -1 if none.
*/
int ceph_pg_to_acting_primary(struct ceph_osdmap *osdmap,
const struct ceph_pg *raw_pgid)
{
struct ceph_pg_pool_info *pi;
struct ceph_osds up, acting;
pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
if (!pi)
return -1;
ceph_pg_to_up_acting_osds(osdmap, pi, raw_pgid, &up, &acting);
return acting.primary;
}
EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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