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linux/net/ceph/osdmap.c
Ilya Dryomov b581a5854e libceph: don't set weight to IN when OSD is destroyed 
Since ceph.git commit 4e28f9e63644 ("osd/OSDMap: clear osd_info,
osd_xinfo on osd deletion"), weight is set to IN when OSD is deleted.
This changes the result of applying an incremental for clients, not
just OSDs.  Because CRUSH computations are obviously affected,
pre-4e28f9e63644 servers disagree with post-4e28f9e63644 clients on
object placement, resulting in misdirected requests.

Mirrors ceph.git commit a6009d1039a55e2c77f431662b3d6cc5a8e8e63f.

Fixes: 930c532869 ("libceph: apply new_state before new_up_client on incrementals")
Link: http://tracker.ceph.com/issues/19122
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
2017-03-07 14:30:38 +01:00

2240 lines
51 KiB
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#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_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 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 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 = -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;
case CRUSH_BUCKET_STRAW2:
size = sizeof(struct crush_bucket_straw2);
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;
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;
case CRUSH_BUCKET_STRAW2:
err = crush_decode_straw2_bucket(p, end,
(struct crush_bucket_straw2 *)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\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);
done:
crush_finalize(c);
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);
}
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;
}
/*
* rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
* to a set of osds) and primary_temp (explicit primary setting)
*/
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 = ceph_pg_compare(&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 = ceph_pg_compare(&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;
}
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;
}
if (ev >= 15)
pi->last_force_request_resend = ceph_decode_32(p);
else
pi->last_force_request_resend = 0;
/* 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;
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);
rb_erase(&pg->node, &map->pg_temp);
kfree(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);
rb_erase(&pg->node, &map->primary_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->osd_primary_affinity);
kfree(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, int max)
{
u8 *state;
u32 *weight;
struct ceph_entity_addr *addr;
int i;
state = krealloc(map->osd_state, max*sizeof(*state), GFP_NOFS);
if (!state)
return -ENOMEM;
map->osd_state = state;
weight = krealloc(map->osd_weight, max*sizeof(*weight), GFP_NOFS);
if (!weight)
return -ENOMEM;
map->osd_weight = weight;
addr = krealloc(map->osd_addr, max*sizeof(*addr), GFP_NOFS);
if (!addr)
return -ENOMEM;
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 = krealloc(map->osd_primary_affinity,
max*sizeof(*affinity), GFP_NOFS);
if (!affinity)
return -ENOMEM;
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 = kmalloc(work_size, GFP_NOIO);
if (!workspace) {
crush_destroy(crush);
return -ENOMEM;
}
crush_init_workspace(crush, workspace);
if (map->crush)
crush_destroy(map->crush);
kfree(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);
}
static int __decode_pg_temp(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 pgid;
u32 len, i;
int ret;
ret = ceph_decode_pgid(p, end, &pgid);
if (ret)
return ret;
ceph_decode_32_safe(p, end, len, e_inval);
ret = __remove_pg_mapping(&map->pg_temp, pgid);
BUG_ON(!incremental && ret != -ENOENT);
if (!incremental || len > 0) {
struct ceph_pg_mapping *pg;
ceph_decode_need(p, end, len*sizeof(u32), e_inval);
if (len > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
return -EINVAL;
pg = kzalloc(sizeof(*pg) + len*sizeof(u32), GFP_NOFS);
if (!pg)
return -ENOMEM;
pg->pgid = pgid;
pg->pg_temp.len = len;
for (i = 0; i < len; i++)
pg->pg_temp.osds[i] = ceph_decode_32(p);
ret = __insert_pg_mapping(pg, &map->pg_temp);
if (ret) {
kfree(pg);
return ret;
}
}
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_pg_temp(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pg_temp(p, end, map, false);
}
static int decode_new_pg_temp(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_pg_temp(p, end, map, true);
}
static int __decode_primary_temp(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 pgid;
u32 osd;
int ret;
ret = ceph_decode_pgid(p, end, &pgid);
if (ret)
return ret;
ceph_decode_32_safe(p, end, osd, e_inval);
ret = __remove_pg_mapping(&map->primary_temp, pgid);
BUG_ON(!incremental && ret != -ENOENT);
if (!incremental || osd != (u32)-1) {
struct ceph_pg_mapping *pg;
pg = kzalloc(sizeof(*pg), GFP_NOFS);
if (!pg)
return -ENOMEM;
pg->pgid = pgid;
pg->primary_temp.osd = osd;
ret = __insert_pg_mapping(pg, &map->primary_temp);
if (ret) {
kfree(pg);
return ret;
}
}
}
return 0;
e_inval:
return -EINVAL;
}
static int decode_primary_temp(void **p, void *end, struct ceph_osdmap *map)
{
return __decode_primary_temp(p, end, map, false);
}
static int decode_new_primary_temp(void **p, void *end,
struct ceph_osdmap *map)
{
return __decode_primary_temp(p, end, map, 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 = kmalloc(map->max_osd*sizeof(u32),
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) {
kfree(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;
}
/*
* 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*(1 + sizeof(*map->osd_weight) +
sizeof(*map->osd_addr)), e_inval);
if (ceph_decode_32(p) != map->max_osd)
goto e_inval;
ceph_decode_copy(p, map->osd_state, map->max_osd);
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;
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 */
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 {
/* XXX can this happen? */
kfree(map->osd_primary_affinity);
map->osd_primary_affinity = NULL;
}
/* 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;
/* 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,
struct ceph_osdmap *map)
{
void *new_up_client;
void *new_state;
void *new_weight_end;
u32 len;
new_up_client = *p;
ceph_decode_32_safe(p, end, len, e_inval);
len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
ceph_decode_need(p, end, len, e_inval);
*p += len;
new_state = *p;
ceph_decode_32_safe(p, end, len, e_inval);
len *= 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;
u8 xorstate;
int ret;
osd = ceph_decode_32(p);
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);
ceph_decode_copy(p, &addr, sizeof(addr));
ceph_decode_addr(&addr);
BUG_ON(osd >= map->max_osd);
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, 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;
}
/* 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)
{
WARN_ON(!ceph_oloc_empty(dest));
WARN_ON(dest->pool_ns); /* empty() only covers ->pool */
dest->pool = src->pool;
if (src->pool_ns)
dest->pool_ns = ceph_get_string(src->pool_ns);
}
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)
{
WARN_ON(!ceph_oid_empty(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);
}
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;
}
static bool 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,
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 ||
is_split(pgid, old_pg_num, new_pg_num) ||
old_sort_bitwise != new_sort_bitwise;
}
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;
}
/*
* 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 = layout->object_size;
u32 su = layout->stripe_unit;
u32 sc = layout->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);
/*
* 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.
*/
int ceph_object_locator_to_pg(struct ceph_osdmap *osdmap,
struct ceph_object_id *oid,
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;
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);
if (!buf)
return -ENOMEM;
}
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);
}
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;
}
}
static int do_crush(struct ceph_osdmap *map, int ruleno, int x,
int *result, int result_max,
const __u32 *weight, int weight_max)
{
int r;
BUG_ON(result_max > CEPH_PG_MAX_SIZE);
mutex_lock(&map->crush_workspace_mutex);
r = crush_do_rule(map->crush, ruleno, x, result, result_max,
weight, weight_max, map->crush_workspace);
mutex_unlock(&map->crush_workspace_mutex);
return r;
}
/*
* Calculate raw set (CRUSH output) for given PG. The result may
* contain 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);
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;
}
/*
* 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 *raw_pgid,
struct ceph_osds *temp)
{
struct ceph_pg pgid;
struct ceph_pg_mapping *pg;
int i;
raw_pg_to_pg(pi, raw_pgid, &pgid);
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,
const struct ceph_pg *raw_pgid,
struct ceph_osds *up,
struct ceph_osds *acting)
{
struct ceph_pg_pool_info *pi;
u32 pps;
pi = ceph_pg_pool_by_id(osdmap, raw_pgid->pool);
if (!pi) {
ceph_osds_init(up);
ceph_osds_init(acting);
goto out;
}
pg_to_raw_osds(osdmap, pi, raw_pgid, up, &pps);
raw_to_up_osds(osdmap, pi, up);
apply_primary_affinity(osdmap, pi, pps, up);
get_temp_osds(osdmap, pi, raw_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;
}
out:
WARN_ON(!osds_valid(up) || !osds_valid(acting));
}
/*
* 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_osds up, acting;
ceph_pg_to_up_acting_osds(osdmap, raw_pgid, &up, &acting);
return acting.primary;
}
EXPORT_SYMBOL(ceph_pg_to_acting_primary);
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