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authorMichael Adam <obnox@samba.org>2011-08-29 17:06:27 +0200
committerMichael Adam <obnox@samba.org>2011-09-01 23:18:18 +0200
commit9352a95bfda2d1a3255d8ad158af0fcef442b53e (patch)
treebd3fa9cd8295d4857e5eff72a281fd2e4f895288
parent5ef11737bc8e32446f3819df17af4ae0e93270a0 (diff)
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s3:registry: add regdb_trans_do(): a transaction wrapper that will check the regdb version
If the version has changed since initialization, the write will fail with ACCESS_DENIED.
-rw-r--r--source3/registry/reg_backend_db.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/source3/registry/reg_backend_db.c b/source3/registry/reg_backend_db.c
index f3a0e1d0d7..821ed6b386 100644
--- a/source3/registry/reg_backend_db.c
+++ b/source3/registry/reg_backend_db.c
@@ -59,6 +59,48 @@ static WERROR regdb_create_subkey_internal(struct db_context *db,
const char *key,
const char *subkey);
+
+struct regdb_trans_ctx {
+ NTSTATUS (*action)(struct db_context *, void *);
+ void *private_data;
+};
+
+static NTSTATUS regdb_trans_do_action(struct db_context *db, void *private_data)
+{
+ NTSTATUS status;
+ int32_t version_id;
+ struct regdb_trans_ctx *ctx = (struct regdb_trans_ctx *)private_data;
+
+ version_id = dbwrap_fetch_int32(db, REGDB_VERSION_KEYNAME);
+
+ if (version_id != REGVER_V3) {
+ DEBUG(0, ("ERROR: changed registry version %d found while "
+ "trying to write to the registry. Version %d "
+ "expected. Denying access.\n",
+ version_id, REGVER_V3));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ status = ctx->action(db, ctx->private_data);
+ return status;
+}
+
+static WERROR regdb_trans_do(struct db_context *db,
+ NTSTATUS (*action)(struct db_context *, void *),
+ void *private_data)
+{
+ NTSTATUS status;
+ struct regdb_trans_ctx ctx;
+
+
+ ctx.action = action;
+ ctx.private_data = private_data;
+
+ status = dbwrap_trans_do(db, regdb_trans_do_action, &ctx);
+
+ return ntstatus_to_werror(status);
+}
+
/* List the deepest path into the registry. All part components will be created.*/
/* If you want to have a part of the path controlled by the tdb and part by