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r12673: create functions for get_maxVersion(), set_maxVersion() and get_seqnumber()

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at the winsdb layer. the ones in wrepl_server/ will be removed later.

metze
(This used to be commit 22cdbc75df)
This commit is contained in:
Stefan Metzmacher 2006-01-02 14:27:54 +00:00 committed by Gerald (Jerry) Carter
parent 0b41dad3fc
commit 6d16a217d3
1 changed files with 73 additions and 9 deletions
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82
source4/nbt_server/wins/winsdb.c
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@ -29,10 +29,39 @@
#include "system/time.h"
#include "auth/auth.h"
uint64_t winsdb_get_maxVersion(struct winsdb_handle *h)
{
int ret;
struct ldb_context *ldb = h->ldb;
struct ldb_dn *dn;
struct ldb_result *res = NULL;
TALLOC_CTX *tmp_ctx = talloc_new(ldb);
uint64_t maxVersion = 0;
dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
if (!dn) goto failed;
/* find the record in the WINS database */
ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
NULL, NULL, &res);
if (ret != LDB_SUCCESS) goto failed;
talloc_steal(tmp_ctx, res);
if (res->count > 1) goto failed;
if (res->count == 1) {
maxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
}
failed:
talloc_free(tmp_ctx);
return maxVersion;
}
/*
return the new maxVersion and save it
if newVersion == 0 return the old maxVersion + 1 and save it
if newVersion > 0 return MAX(oldMaxVersion, newMaxVersion) and save it
*/
static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
uint64_t winsdb_set_maxVersion(struct winsdb_handle *h, uint64_t newMaxVersion)
{
int trans;
int ret;
@ -41,7 +70,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
struct ldb_message *msg = NULL;
struct ldb_context *wins_db = h->ldb;
TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
uint64_t maxVersion = 0;
uint64_t oldMaxVersion = 0;
trans = ldb_transaction_start(wins_db);
if (trans != LDB_SUCCESS) goto failed;
@ -58,9 +87,14 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
talloc_steal(tmp_ctx, res);
if (res->count == 1) {
maxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
oldMaxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
}
if (newMaxVersion == 0) {
newMaxVersion = oldMaxVersion + 1;
} else {
newMaxVersion = MAX(oldMaxVersion, newMaxVersion);
}
maxVersion++;
msg = ldb_msg_new(tmp_ctx);
if (!msg) goto failed;
@ -73,7 +107,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
if (ret != 0) goto failed;
ret = ldb_msg_add_empty(msg, "maxVersion", LDB_FLAG_MOD_REPLACE);
if (ret != 0) goto failed;
ret = ldb_msg_add_fmt(msg, "maxVersion", "%llu", (long long)maxVersion);
ret = ldb_msg_add_fmt(msg, "maxVersion", "%llu", (long long)newMaxVersion);
if (ret != 0) goto failed;
ret = ldb_modify(wins_db, msg);
@ -84,7 +118,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
if (trans != LDB_SUCCESS) goto failed;
talloc_free(tmp_ctx);
return maxVersion;
return newMaxVersion;
failed:
if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
@ -92,6 +126,34 @@ failed:
return 0;
}
uint64_t winsdb_get_seqnumber(struct winsdb_handle *h)
{
int ret;
struct ldb_context *ldb = h->ldb;
struct ldb_dn *dn;
struct ldb_result *res = NULL;
TALLOC_CTX *tmp_ctx = talloc_new(ldb);
uint64_t seqnumber = 0;
dn = ldb_dn_explode(tmp_ctx, "@BASEINFO");
if (!dn) goto failed;
/* find the record in the WINS database */
ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
NULL, NULL, &res);
if (ret != LDB_SUCCESS) goto failed;
talloc_steal(tmp_ctx, res);
if (res->count > 1) goto failed;
if (res->count == 1) {
seqnumber = ldb_msg_find_uint64(res->msgs[0], "sequenceNumber", 0);
}
failed:
talloc_free(tmp_ctx);
return seqnumber;
}
/*
return a DN for a nbt_name
*/
@ -595,7 +657,8 @@ uint8_t winsdb_add(struct winsdb_handle *h, struct winsdb_record *rec, uint32_t
if (trans != LDB_SUCCESS) goto failed;
if (flags & WINSDB_FLAG_ALLOC_VERSION) {
rec->version = winsdb_allocate_version(h);
/* passing '0' means auto-allocate a new one */
rec->version = winsdb_set_maxVersion(h, 0);
if (rec->version == 0) goto failed;
}
if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {
@ -636,7 +699,8 @@ uint8_t winsdb_modify(struct winsdb_handle *h, struct winsdb_record *rec, uint32
if (trans != LDB_SUCCESS) goto failed;
if (flags & WINSDB_FLAG_ALLOC_VERSION) {
rec->version = winsdb_allocate_version(h);
/* passing '0' means auto-allocate a new one */
rec->version = winsdb_set_maxVersion(h, 0);
if (rec->version == 0) goto failed;
}
if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {