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s4-dsdb: implement refresh of RID Set pool for a local RID Manager

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when we run out of RIDs in our RID Set pool then grab a new one from
the RID Manager object

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andrew Tridgell 2010-01-06 10:27:30 +11:00
parent 53d10d139e
commit 5136438ad6
1 changed files with 151 additions and 44 deletions
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195
source4/dsdb/samdb/ldb_modules/ridalloc.c
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@ -33,6 +33,64 @@
#include "dsdb/samdb/ldb_modules/util.h"
/*
allocate a new range of RIDs in the RID Manager object
*/
static int ridalloc_rid_manager_allocate(struct ldb_module *module, struct ldb_dn *rid_manager_dn, uint64_t *new_pool)
{
int ret;
TALLOC_CTX *tmp_ctx = talloc_new(module);
const char *attrs[] = { "rIDAvailablePool", NULL };
uint64_t rid_pool, new_rid_pool, dc_pool;
uint32_t rid_pool_lo, rid_pool_hi;
struct ldb_result *res;
struct ldb_context *ldb = ldb_module_get_ctx(module);
const unsigned alloc_size = 500;
ret = dsdb_module_search_dn(module, tmp_ctx, &res, rid_manager_dn, attrs, 0);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to find rIDAvailablePool in %s - %s",
ldb_dn_get_linearized(rid_manager_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
rid_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDAvailablePool", 0);
rid_pool_lo = rid_pool & 0xFFFFFFFF;
rid_pool_hi = rid_pool >> 32;
if (rid_pool_lo >= rid_pool_hi) {
ldb_asprintf_errstring(ldb, "Out of RIDs in RID Manager - rIDAvailablePool is %u-%u",
rid_pool_lo, rid_pool_hi);
talloc_free(tmp_ctx);
return ret;
}
/* lower part of new pool is the low part of the rIDAvailablePool */
dc_pool = rid_pool_lo;
/* allocate 500 RIDs to this DC */
rid_pool_lo = MIN(rid_pool_hi, rid_pool_lo + alloc_size);
/* work out upper part of new pool */
dc_pool |= (((uint64_t)rid_pool_lo-1)<<32);
/* and new rIDAvailablePool value */
new_rid_pool = rid_pool_lo | (((uint64_t)rid_pool_hi)<<32);
ret = dsdb_module_constrainted_update_integer(module, rid_manager_dn, "rIDAvailablePool",
rid_pool, new_rid_pool);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to update rIDAvailablePool - %s",
ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
(*new_pool) = dc_pool;
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
/*
create a RID Set object for the specified DC
*/
@ -43,13 +101,9 @@ static int ridalloc_create_rid_set_ntds(struct ldb_module *module, TALLOC_CTX *m
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
struct ldb_dn *server_dn, *machine_dn, *rid_set_dn;
int ret;
const char *attrs[] = { "rIDAvailablePool", NULL };
uint64_t rid_pool, new_rid_pool, dc_pool;
uint32_t rid_pool_lo, rid_pool_hi;
uint64_t dc_pool;
struct ldb_message *msg;
struct ldb_context *ldb = ldb_module_get_ctx(module);
const unsigned int alloc_size = 500;
struct ldb_result *res;
/*
steps:
@ -87,41 +141,9 @@ static int ridalloc_create_rid_set_ntds(struct ldb_module *module, TALLOC_CTX *m
return LDB_ERR_OPERATIONS_ERROR;
}
ret = dsdb_module_search_dn(module, tmp_ctx, &res, rid_manager_dn, attrs, 0);
/* grab a pool from the RID Manager object */
ret = ridalloc_rid_manager_allocate(module, rid_manager_dn, &dc_pool);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to find rIDAvailablePool in %s - %s",
ldb_dn_get_linearized(rid_manager_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
rid_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDAvailablePool", 0);
rid_pool_lo = rid_pool & 0xFFFFFFFF;
rid_pool_hi = rid_pool >> 32;
if (rid_pool_lo >= rid_pool_hi) {
ldb_asprintf_errstring(ldb, "Out of RIDs in RID Manager - rIDAvailablePool is %u-%u",
rid_pool_lo, rid_pool_hi);
talloc_free(tmp_ctx);
return ret;
}
/* lower part of new pool is the low part of the rIDAvailablePool */
dc_pool = rid_pool_lo;
/* allocate 500 RIDs to this DC */
rid_pool_lo = MIN(rid_pool_hi, rid_pool_lo + alloc_size);
/* work out upper part of new pool */
dc_pool |= (((uint64_t)rid_pool_lo-1)<<32);
/* and new rIDAvailablePool value */
new_rid_pool = rid_pool_lo | (((uint64_t)rid_pool_hi)<<32);
ret = dsdb_module_constrainted_update_integer(module, rid_manager_dn, "rIDAvailablePool",
rid_pool, new_rid_pool);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to update rIDAvailablePool - %s",
ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
@ -252,11 +274,96 @@ static int ridalloc_create_own_rid_set(struct ldb_module *module, TALLOC_CTX *me
also returns the first RID for the new pool
*/
static int ridalloc_refresh_rid_set_ntds(struct ldb_module *module,
struct ldb_dn *rid_manager_dn,
struct ldb_dn *ntds_dn, uint32_t *first_rid)
struct ldb_dn *rid_manager_dn,
struct ldb_dn *ntds_dn, uint32_t *first_rid)
{
ldb_asprintf_errstring(ldb, "Refresh of RID Set not implemented");
return LDB_ERR_UNWILLING_TO_PERFORM;
TALLOC_CTX *tmp_ctx = talloc_new(module);
uint64_t new_pool;
struct ldb_dn *server_dn, *machine_dn, *rid_set_dn;
struct ldb_result *res;
const char *attrs[] = { "rIDAllocationPool", "rIDUsedPool", NULL };
struct ldb_message *msg;
uint64_t prev_pool;
uint32_t used_pool;
struct ldb_context *ldb = ldb_module_get_ctx(module);
int ret;
/* grab a pool from the RID Manager object */
ret = ridalloc_rid_manager_allocate(module, rid_manager_dn, &new_pool);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
server_dn = ldb_dn_get_parent(tmp_ctx, ntds_dn);
if (!server_dn) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = dsdb_module_reference_dn(module, tmp_ctx, server_dn, "serverReference", &machine_dn);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to find serverReference in %s - %s",
ldb_dn_get_linearized(server_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
ret = dsdb_module_reference_dn(module, tmp_ctx, machine_dn, "rIDSetReferences", &rid_set_dn);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to find rIDSetReferences in %s - %s",
ldb_dn_get_linearized(machine_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
ret = dsdb_module_search_dn(module, tmp_ctx, &res, rid_set_dn, attrs, 0);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to load old pool values from %s - %s",
ldb_dn_get_linearized(rid_set_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
prev_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDAllocationPool", 0);
used_pool = ldb_msg_find_attr_as_uint(res->msgs[0], "rIDUsedPool", 0);
msg = ldb_msg_new(tmp_ctx);
msg->dn = rid_set_dn;
ret = ldb_msg_add_fmt(msg, "rIDPreviousAllocationPool", "%llu", (unsigned long long)prev_pool);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
msg->elements[0].flags = LDB_FLAG_MOD_REPLACE;
ret = ldb_msg_add_fmt(msg, "rIDAllocationPool", "%llu", (unsigned long long)new_pool);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
msg->elements[1].flags = LDB_FLAG_MOD_REPLACE;
ret = ldb_msg_add_fmt(msg, "rIDUsedPool", "%lu", (unsigned long)used_pool+1);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
msg->elements[2].flags = LDB_FLAG_MOD_REPLACE;
ret = dsdb_module_modify(module, msg, 0);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to modify RID Set object %s - %s",
ldb_dn_get_linearized(rid_set_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
(*first_rid) = (new_pool & 0xFFFFFFFF);
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
@ -350,7 +457,7 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
alloc_pool_lo = alloc_pool & 0xFFFFFFFF;
alloc_pool_hi = alloc_pool >> 32;
if (prev_rid > alloc_pool_hi) {
if (prev_rid >= alloc_pool_hi) {
ret = ridalloc_refresh_own_pool(module, rid);
if (ret != LDB_SUCCESS) {
return ret;