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authorAndrew Tridgell <tridge@samba.org>2010-01-06 16:47:11 +1100
committerAndrew Tridgell <tridge@samba.org>2010-01-08 13:03:01 +1100
commitdc11414f987aa99f286acb1d1ece625d290831f3 (patch)
tree2d9e7b248354bd4ea9243a39dbd364ee0b8b06c8 /source4/dsdb
parent805ab0ef15faf339c4336eb95e09e1bea4b85d5a (diff)
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s4-dsdb: send a message to the drepl task when we need another RID pool
We send the message when the current pool is half gone. We don't wait for a reply. Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'source4/dsdb')
-rw-r--r--source4/dsdb/samdb/ldb_modules/ridalloc.c72
1 files changed, 66 insertions, 6 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/ridalloc.c b/source4/dsdb/samdb/ldb_modules/ridalloc.c
index 02737dd88b..c3d334ff3a 100644
--- a/source4/dsdb/samdb/ldb_modules/ridalloc.c
+++ b/source4/dsdb/samdb/ldb_modules/ridalloc.c
@@ -31,6 +31,8 @@
#include "ldb_module.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/samdb/ldb_modules/util.h"
+#include "lib/messaging/irpc.h"
+#include "param/param.h"
/*
Note: the RID allocation attributes in AD are very badly named. Here
@@ -280,7 +282,7 @@ static int ridalloc_create_own_rid_set(struct ldb_module *module, TALLOC_CTX *me
}
if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
- ldb_asprintf_errstring(ldb, "Remote RID Set allocation not implemented");
+ ldb_asprintf_errstring(ldb, "Remote RID Set allocation needs refresh");
talloc_free(tmp_ctx);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
@@ -345,6 +347,43 @@ static int ridalloc_refresh_rid_set_ntds(struct ldb_module *module,
}
+/*
+ make a IRPC call to the drepl task to ask it to get the RID
+ Manager to give us another RID pool.
+
+ This function just sends the message to the drepl task then
+ returns immediately. It should be called well before we
+ completely run out of RIDs
+ */
+static void ridalloc_poke_rid_manager(struct ldb_module *module)
+{
+ struct messaging_context *msg;
+ struct server_id *server;
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ struct loadparm_context *lp_ctx = ldb_get_opaque(ldb, "loadparm");
+ TALLOC_CTX *tmp_ctx = talloc_new(module);
+
+ msg = messaging_client_init(tmp_ctx, lp_messaging_path(tmp_ctx, lp_ctx),
+ lp_iconv_convenience(lp_ctx),
+ ldb_get_event_context(ldb));
+ if (!msg) {
+ DEBUG(3,(__location__ ": Failed to create messaging context\n"));
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ server = irpc_servers_byname(msg, msg, "dreplsrv");
+ if (!server) {
+ /* this means the drepl service is not running */
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ messaging_send(msg, server[0], MSG_DREPL_ALLOCATE_RID, NULL);
+
+ /* we don't care if the message got through */
+ talloc_free(tmp_ctx);
+}
/*
get a new RID pool for ourselves
@@ -376,7 +415,7 @@ static int ridalloc_refresh_own_pool(struct ldb_module *module, uint64_t *new_po
}
if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
- ldb_asprintf_errstring(ldb, "Remote RID Set allocation not implemented");
+ ldb_asprintf_errstring(ldb, "Remote RID Set allocation needs refresh");
talloc_free(tmp_ctx);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
@@ -395,15 +434,17 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
{
struct ldb_context *ldb;
static const char * const attrs[] = { "rIDAllocationPool", "rIDPreviousAllocationPool",
- "rIDNextRID" , NULL };
+ "rIDNextRID" , "rIDUsedPool", NULL };
int ret;
struct ldb_dn *rid_set_dn;
struct ldb_result *res;
uint64_t alloc_pool, prev_alloc_pool;
uint32_t prev_alloc_pool_lo, prev_alloc_pool_hi;
+ uint32_t rid_used_pool;
int prev_rid;
TALLOC_CTX *tmp_ctx = talloc_new(module);
+ (*rid) = 0;
ldb = ldb_module_get_ctx(module);
ret = samdb_rid_set_dn(ldb, tmp_ctx, &rid_set_dn);
@@ -428,6 +469,7 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
prev_alloc_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDPreviousAllocationPool", 0);
alloc_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDAllocationPool", 0);
prev_rid = ldb_msg_find_attr_as_int(res->msgs[0], "rIDNextRID", 0);
+ rid_used_pool = ldb_msg_find_attr_as_int(res->msgs[0], "rIDUsedPool", 0);
if (alloc_pool == 0) {
ldb_asprintf_errstring(ldb, __location__ ": Bad RID Set %s",
ldb_dn_get_linearized(rid_set_dn));
@@ -453,7 +495,19 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
prev_alloc_pool = alloc_pool;
prev_alloc_pool_lo = prev_alloc_pool & 0xFFFFFFFF;
prev_alloc_pool_hi = prev_alloc_pool >> 32;
+
+ /* update the rIDUsedPool attribute */
+ ret = dsdb_module_set_integer(module, rid_set_dn, "rIDUsedPool", rid_used_pool+1);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb, __location__ ": Failed to update rIDUsedPool on %s - %s",
+ ldb_dn_get_linearized(rid_set_dn), ldb_errstring(ldb));
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ (*rid) = prev_alloc_pool_lo;
}
+
/* see if we are still out of RIDs, and if so then ask
the RID Manager to give us more */
if (prev_rid >= prev_alloc_pool_hi) {
@@ -477,9 +531,7 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
} else {
/* despite the name, rIDNextRID is the value of the last user
* added by this DC, not the next available RID */
- if (prev_rid == 0) {
- (*rid) = prev_alloc_pool_lo;
- } else {
+ if (*rid == 0) {
(*rid) = prev_rid + 1;
}
}
@@ -499,7 +551,15 @@ int ridalloc_allocate_rid(struct ldb_module *module, uint32_t *rid)
} else {
ret = dsdb_module_constrainted_update_integer(module, rid_set_dn, "rIDNextRID", prev_rid, *rid);
}
+
+ /* if we are half-exhausted then ask the repl task to start
+ * getting another one */
+ if (*rid > (prev_alloc_pool_hi + prev_alloc_pool_lo)/2) {
+ ridalloc_poke_rid_manager(module);
+ }
+
talloc_free(tmp_ctx);
+
return ret;
}