Unix SMB/CIFS implementation.
Utility functions for the dbwrap API
Copyright (C) Volker Lendecke 2007
-
+ Copyright (C) Michael Adam 2009
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
+
+ Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
*/
#include "includes.h"
+#include "dbwrap.h"
+#include "util_tdb.h"
int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
{
return NT_STATUS_IS_OK(status) ? 0 : -1;
}
-uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
- uint32_t *oldval, uint32_t change_val)
+bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
+ uint32_t *val)
+{
+ TDB_DATA dbuf;
+
+ if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
+ return false;
+ }
+
+ if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
+ TALLOC_FREE(dbuf.dptr);
+ return false;
+ }
+
+ *val = IVAL(dbuf.dptr, 0);
+ TALLOC_FREE(dbuf.dptr);
+ return true;
+}
+
+int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
{
struct db_record *rec;
- uint32 val = -1;
- TDB_DATA data;
+ uint32 v_store;
+ NTSTATUS status;
- if (!(rec = db->fetch_locked(db, NULL,
- string_term_tdb_data(keystr)))) {
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
+ if (rec == NULL) {
return -1;
}
- if ((rec->value.dptr != NULL)
- && (rec->value.dsize == sizeof(val))) {
+ SIVAL(&v_store, 0, v);
+
+ status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+ TALLOC_FREE(rec);
+ return NT_STATUS_IS_OK(status) ? 0 : -1;
+}
+
+/**
+ * Atomic unsigned integer change (addition):
+ *
+ * if value does not exist yet in the db, use *oldval as initial old value.
+ * return old value in *oldval.
+ * store *oldval + change_val to db.
+ */
+
+struct dbwrap_change_uint32_atomic_context {
+ const char *keystr;
+ uint32_t *oldval;
+ uint32_t change_val;
+};
+
+static NTSTATUS dbwrap_change_uint32_atomic_action(struct db_context *db,
+ void *private_data)
+{
+ struct db_record *rec;
+ uint32_t val = (uint32_t)-1;
+ uint32_t v_store;
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context *state;
+
+ state = (struct dbwrap_change_uint32_atomic_context *)private_data;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
+ if (!rec) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (rec->value.dptr == NULL) {
+ val = *(state->oldval);
+ } else if (rec->value.dsize == sizeof(val)) {
+ val = IVAL(rec->value.dptr, 0);
+ *(state->oldval) = val;
+ } else {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ val += state->change_val;
+
+ SIVAL(&v_store, 0, val);
+
+ ret = rec->store(rec,
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+
+done:
+ TALLOC_FREE(rec);
+ return ret;
+}
+
+NTSTATUS dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
+ uint32_t *oldval, uint32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_change_uint32_atomic_action(db, &state);
+
+ return ret;
+}
+
+NTSTATUS dbwrap_trans_change_uint32_atomic(struct db_context *db,
+ const char *keystr,
+ uint32_t *oldval,
+ uint32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_uint32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_trans_do(db, dbwrap_change_uint32_atomic_action, &state);
+
+ return ret;
+}
+
+/**
+ * Atomic integer change (addition):
+ *
+ * if value does not exist yet in the db, use *oldval as initial old value.
+ * return old value in *oldval.
+ * store *oldval + change_val to db.
+ */
+
+struct dbwrap_change_int32_atomic_context {
+ const char *keystr;
+ int32_t *oldval;
+ int32_t change_val;
+};
+
+static NTSTATUS dbwrap_change_int32_atomic_action(struct db_context *db,
+ void *private_data)
+{
+ struct db_record *rec;
+ int32_t val = -1;
+ int32_t v_store;
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context *state;
+
+ state = (struct dbwrap_change_int32_atomic_context *)private_data;
+
+ rec = db->fetch_locked(db, NULL, string_term_tdb_data(state->keystr));
+ if (!rec) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (rec->value.dptr == NULL) {
+ val = *(state->oldval);
+ } else if (rec->value.dsize == sizeof(val)) {
val = IVAL(rec->value.dptr, 0);
+ *(state->oldval) = val;
+ } else {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
}
- val += change_val;
+ val += state->change_val;
+
+ SIVAL(&v_store, 0, val);
+
+ ret = rec->store(rec,
+ make_tdb_data((const uint8_t *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+
+done:
+ TALLOC_FREE(rec);
+ return ret;
+}
+
+NTSTATUS dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
+ int32_t *oldval, int32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_change_int32_atomic_action(db, &state);
+
+ return ret;
+}
+
+NTSTATUS dbwrap_trans_change_int32_atomic(struct db_context *db,
+ const char *keystr,
+ int32_t *oldval,
+ int32_t change_val)
+{
+ NTSTATUS ret;
+ struct dbwrap_change_int32_atomic_context state;
+
+ state.keystr = keystr;
+ state.oldval = oldval;
+ state.change_val = change_val;
+
+ ret = dbwrap_trans_do(db, dbwrap_change_int32_atomic_action, &state);
+
+ return ret;
+}
+
+struct dbwrap_store_context {
+ TDB_DATA *key;
+ TDB_DATA *dbuf;
+ int flag;
+};
+
+static NTSTATUS dbwrap_store_action(struct db_context *db, void *private_data)
+{
+ struct db_record *rec = NULL;
+ NTSTATUS status;
+ struct dbwrap_store_context *store_ctx;
- data.dsize = sizeof(val);
- data.dptr = (uint8 *)&val;
+ store_ctx = (struct dbwrap_store_context *)private_data;
- rec->store(rec, data, TDB_REPLACE);
+ rec = db->fetch_locked(db, talloc_tos(), *(store_ctx->key));
+ if (rec == NULL) {
+ DEBUG(5, ("fetch_locked failed\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->store(rec, *(store_ctx->dbuf), store_ctx->flag);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("store returned %s\n", nt_errstr(status)));
+ }
TALLOC_FREE(rec);
+ return status;
+}
- return 0;
+NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
+ int flag)
+{
+ NTSTATUS status;
+ struct dbwrap_store_context store_ctx;
+
+ store_ctx.key = &key;
+ store_ctx.dbuf = &dbuf;
+ store_ctx.flag = flag;
+
+ status = dbwrap_trans_do(db, dbwrap_store_action, &store_ctx);
+
+ return status;
}
+static NTSTATUS dbwrap_delete_action(struct db_context * db, void *private_data)
+{
+ NTSTATUS status;
+ struct db_record *rec;
+ TDB_DATA *key = (TDB_DATA *)private_data;
+
+ rec = db->fetch_locked(db, talloc_tos(), *key);
+ if (rec == NULL) {
+ DEBUG(5, ("fetch_locked failed\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
+ }
+
+ talloc_free(rec);
+ return status;
+}
+
+NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
+{
+ NTSTATUS status;
+
+ status = dbwrap_trans_do(db, dbwrap_delete_action, &key);
+
+ return status;
+}
+
+NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
+ int32_t v)
+{
+ int32 v_store;
+
+ SIVAL(&v_store, 0, v);
+
+ return dbwrap_trans_store(db, string_term_tdb_data(keystr),
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+}
+
+NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
+ uint32_t v)
+{
+ uint32 v_store;
+
+ SIVAL(&v_store, 0, v);
+
+ return dbwrap_trans_store(db, string_term_tdb_data(keystr),
+ make_tdb_data((const uint8 *)&v_store,
+ sizeof(v_store)),
+ TDB_REPLACE);
+}
+
+NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
+}
+
+NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
+{
+ return dbwrap_trans_delete(db, string_term_tdb_data(key));
+}
+
+/**
+ * Wrap db action(s) into a transaction.
+ */
+NTSTATUS dbwrap_trans_do(struct db_context *db,
+ NTSTATUS (*action)(struct db_context *, void *),
+ void *private_data)
+{
+ int res;
+ NTSTATUS status;
+
+ res = db->transaction_start(db);
+ if (res != 0) {
+ DEBUG(5, ("transaction_start failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ status = action(db, private_data);
+ if (!NT_STATUS_IS_OK(status)) {
+ if (db->transaction_cancel(db) != 0) {
+ smb_panic("Cancelling transaction failed");
+ }
+ return status;
+ }
+
+ res = db->transaction_commit(db);
+ if (res == 0) {
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(2, ("transaction_commit failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+}
+
+struct dbwrap_trans_traverse_action_ctx {
+ int (*f)(struct db_record* rec, void* private_data);
+ void* private_data;
+};
+
+
+static NTSTATUS dbwrap_trans_traverse_action(struct db_context* db, void* private_data)
+{
+ struct dbwrap_trans_traverse_action_ctx* ctx =
+ (struct dbwrap_trans_traverse_action_ctx*)private_data;
+
+ int ret = db->traverse(db, ctx->f, ctx->private_data);
+
+ return (ret == -1) ? NT_STATUS_INTERNAL_DB_CORRUPTION : NT_STATUS_OK;
+}
+
+NTSTATUS dbwrap_trans_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data)
+{
+ struct dbwrap_trans_traverse_action_ctx ctx = {
+ .f = f,
+ .private_data = private_data,
+ };
+ return dbwrap_trans_do(db, dbwrap_trans_traverse_action, &ctx);
+}
+
+NTSTATUS dbwrap_traverse(struct db_context *db,
+ int (*f)(struct db_record*, void*),
+ void *private_data)
+{
+ int ret = db->traverse(db, f, private_data);
+ return (ret == -1) ? NT_STATUS_INTERNAL_DB_CORRUPTION : NT_STATUS_OK;
+}
+
+
+
+NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
+{
+ struct db_record *rec;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, talloc_tos(), key);
+ if (rec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ status = rec->delete_rec(rec);
+ TALLOC_FREE(rec);
+ return status;
+}
+
+NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
+ TDB_DATA data, int flags)
+{
+ struct db_record *rec;
+ NTSTATUS status;
+
+ rec = db->fetch_locked(db, talloc_tos(), key);
+ if (rec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = rec->store(rec, data, flags);
+ TALLOC_FREE(rec);
+ return status;
+}
+
+TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ TDB_DATA result;
+
+ if (db->fetch(db, mem_ctx, key, &result) == -1) {
+ return make_tdb_data(NULL, 0);
+ }
+
+ return result;
+}
+
+NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
+{
+ return dbwrap_delete(db, string_term_tdb_data(key));
+}
+
+NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ return dbwrap_store(db, string_term_tdb_data(key), data, flags);
+}
+
+TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key)
+{
+ return dbwrap_fetch(db, mem_ctx, string_term_tdb_data(key));
+}
+
+
+
+NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key)
+{
+ char *key_upper;
+ NTSTATUS status;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dbwrap_delete_bystring(db, key_upper);
+
+ talloc_free(key_upper);
+ return status;
+}
+
+NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
+ TDB_DATA data, int flags)
+{
+ char *key_upper;
+ NTSTATUS status;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dbwrap_store_bystring(db, key_upper, data, flags);
+
+ talloc_free(key_upper);
+ return status;
+}
+
+TDB_DATA dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
+ const char *key)
+{
+ char *key_upper;
+ TDB_DATA result;
+
+ key_upper = talloc_strdup_upper(talloc_tos(), key);
+ if (key_upper == NULL) {
+ return make_tdb_data(NULL, 0);
+ }
+
+ result = dbwrap_fetch_bystring(db, mem_ctx, key_upper);
+
+ talloc_free(key_upper);
+ return result;
+}
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