static struct db_context *regdb = NULL;
static int regdb_refcount;
-static bool regdb_key_exists(const char *key);
+static bool regdb_key_exists(struct db_context *db, const char *key);
+static bool regdb_key_is_base_key(const char *key);
+static int regdb_fetch_keys_internal(struct db_context *db, const char *key,
+ struct regsubkey_ctr *ctr);
+static bool regdb_store_keys_internal(struct db_context *db, const char *key,
+ struct regsubkey_ctr *ctr);
/* List the deepest path into the registry. All part components will be created.*/
char *remaining = NULL;
char *keyname;
char *subkeyname;
- REGSUBKEY_CTR *subkeys;
+ struct regsubkey_ctr *subkeys;
const char *p, *p2;
DEBUG(6, ("init_registry_key: Adding [%s]\n", add_path));
* since we are about to update the record.
* We just want any subkeys already present */
- if (!(subkeys = TALLOC_ZERO_P(frame, REGSUBKEY_CTR))) {
+ werr = regsubkey_ctr_init(frame, &subkeys);
+ if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("talloc() failure!\n"));
- werr = WERR_NOMEM;
goto fail;
}
- regdb_fetch_keys(base, subkeys);
+ regdb_fetch_keys_internal(regdb, base, subkeys);
if (*subkeyname) {
werr = regsubkey_ctr_addkey(subkeys, subkeyname);
if (!W_ERROR_IS_OK(werr)) {
goto fail;
}
}
- if (!regdb_store_keys( base, subkeys)) {
+ if (!regdb_store_keys_internal(regdb, base, subkeys)) {
werr = WERR_CAN_NOT_COMPLETE;
goto fail;
}
{
WERROR werr;
- if (regdb_key_exists(add_path)) {
+ if (regdb_key_exists(regdb, add_path)) {
return WERR_OK;
}
{
WERROR werr;
TALLOC_CTX *frame = talloc_stackframe();
- REGVAL_CTR *values;
+ struct regval_ctr *values;
int i;
UNISTR2 data;
* If all do already exist, we can save the writes.
*/
for (i=0; builtin_registry_paths[i] != NULL; i++) {
- if (!regdb_key_exists(builtin_registry_paths[i])) {
+ if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
goto do_init;
}
}
for (i=0; builtin_registry_values[i].path != NULL; i++) {
- values = TALLOC_ZERO_P(frame, REGVAL_CTR);
+ values = TALLOC_ZERO_P(frame, struct regval_ctr);
if (values == NULL) {
werr = WERR_NOMEM;
goto done;
/* loop over all of the predefined paths and add each component */
for (i=0; builtin_registry_paths[i] != NULL; i++) {
- if (regdb_key_exists(builtin_registry_paths[i])) {
+ if (regdb_key_exists(regdb, builtin_registry_paths[i])) {
continue;
}
werr = init_registry_key_internal(builtin_registry_paths[i]);
for (i=0; builtin_registry_values[i].path != NULL; i++) {
- values = TALLOC_ZERO_P(frame, REGVAL_CTR);
+ values = TALLOC_ZERO_P(frame, struct regval_ctr);
if (values == NULL) {
werr = WERR_NOMEM;
goto fail;
return WERR_OK;
}
- regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
+ regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR, 0600);
if (!regdb) {
- regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
+ regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
if (!regdb) {
werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
- DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
+ DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
state_path("registry.tdb"), strerror(errno) ));
return werr;
}
vers_id, REGVER_V1));
status = dbwrap_trans_store_int32(regdb, vstring, REGVER_V1);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("regdb_init: error storing %s = %d: %s\n",
+ DEBUG(1, ("regdb_init: error storing %s = %d: %s\n",
vstring, REGVER_V1, nt_errstr(status)));
return ntstatus_to_werror(status);
} else {
become_root();
- regdb = db_open_trans(NULL, state_path("registry.tdb"), 0,
+ regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR, 0600);
if ( !regdb ) {
result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
return 0;
}
+WERROR regdb_transaction_start(void)
+{
+ return (regdb->transaction_start(regdb) == 0) ?
+ WERR_OK : WERR_REG_IO_FAILURE;
+}
+
+WERROR regdb_transaction_commit(void)
+{
+ return (regdb->transaction_commit(regdb) == 0) ?
+ WERR_OK : WERR_REG_IO_FAILURE;
+}
+
+WERROR regdb_transaction_cancel(void)
+{
+ return (regdb->transaction_cancel(regdb) == 0) ?
+ WERR_OK : WERR_REG_IO_FAILURE;
+}
+
/***********************************************************************
return the tdb sequence number of the registry tdb.
this is an indicator for the content of the registry
return regdb->get_seqnum(regdb);
}
+
+static WERROR regdb_delete_key_with_prefix(struct db_context *db,
+ const char *keyname,
+ const char *prefix)
+{
+ char *path;
+ WERROR werr = WERR_NOMEM;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ if (keyname == NULL) {
+ werr = WERR_INVALID_PARAM;
+ goto done;
+ }
+
+ if (prefix == NULL) {
+ path = discard_const_p(char, keyname);
+ } else {
+ path = talloc_asprintf(mem_ctx, "%s/%s", prefix, keyname);
+ if (path == NULL) {
+ goto done;
+ }
+ }
+
+ path = normalize_reg_path(mem_ctx, path);
+ if (path == NULL) {
+ goto done;
+ }
+
+ werr = ntstatus_to_werror(dbwrap_delete_bystring(db, path));
+
+ /* treat "not" found" as ok */
+ if (W_ERROR_EQUAL(werr, WERR_NOT_FOUND)) {
+ werr = WERR_OK;
+ }
+
+done:
+ talloc_free(mem_ctx);
+ return werr;
+}
+
+
+static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
+{
+ return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
+}
+
+static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
+{
+ return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
+}
+
+static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
+{
+ return regdb_delete_key_with_prefix(db, keyname, NULL);
+}
+
+static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
+{
+ WERROR werr;
+
+ werr = regdb_delete_values(db, keyname);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(1, (__location__ " Deleting %s/%s failed: %s\n",
+ REG_VALUE_PREFIX, keyname, win_errstr(werr)));
+ goto done;
+ }
+
+ werr = regdb_delete_secdesc(db, keyname);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(1, (__location__ " Deleting %s/%s failed: %s\n",
+ REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
+ goto done;
+ }
+
+ werr = regdb_delete_subkeylist(db, keyname);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(1, (__location__ " Deleting %s failed: %s\n",
+ keyname, win_errstr(werr)));
+ goto done;
+ }
+
+done:
+ return werr;
+}
+
/***********************************************************************
Add subkey strings to the registry tdb under a defined key
fmt is the same format as tdb_pack except this function only supports
fstrings
***********************************************************************/
-static bool regdb_store_keys_internal(const char *key, REGSUBKEY_CTR *ctr)
+static bool regdb_store_keys_internal2(struct db_context *db,
+ const char *key,
+ struct regsubkey_ctr *ctr)
{
TDB_DATA dbuf;
uint8 *buffer = NULL;
/* pack all the strings */
for (i=0; i<num_subkeys; i++) {
- len += tdb_pack(buffer+len, buflen-len, "f",
- regsubkey_ctr_specific_key(ctr, i));
- if (len > buflen) {
- /* allocate some extra space */
- buffer = (uint8 *)SMB_REALLOC(buffer, len*2);
+ size_t thistime;
+
+ thistime = tdb_pack(buffer+len, buflen-len, "f",
+ regsubkey_ctr_specific_key(ctr, i));
+ if (len+thistime > buflen) {
+ size_t thistime2;
+ /*
+ * tdb_pack hasn't done anything because of the short
+ * buffer, allocate extra space.
+ */
+ buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
+ (len+thistime)*2);
if(buffer == NULL) {
DEBUG(0, ("regdb_store_keys: Failed to realloc "
- "memory of size [%d]\n", len*2));
+ "memory of size [%u]\n",
+ (unsigned int)(len+thistime)*2));
+ ret = false;
+ goto done;
+ }
+ buflen = (len+thistime)*2;
+ thistime2 = tdb_pack(
+ buffer+len, buflen-len, "f",
+ regsubkey_ctr_specific_key(ctr, i));
+ if (thistime2 != thistime) {
+ DEBUG(0, ("tdb_pack failed\n"));
ret = false;
goto done;
}
- buflen = len*2;
- len = tdb_pack(buffer+len, buflen-len, "f",
- regsubkey_ctr_specific_key(ctr, i));
}
+ len += thistime;
}
/* finally write out the data */
dbuf.dptr = buffer;
dbuf.dsize = len;
- status = dbwrap_store_bystring(regdb, keyname, dbuf, TDB_REPLACE);
+ status = dbwrap_store_bystring(db, keyname, dbuf, TDB_REPLACE);
if (!NT_STATUS_IS_OK(status)) {
ret = false;
goto done;
}
+ /*
+ * Delete a sorted subkey cache for regdb_key_exists, will be
+ * recreated automatically
+ */
+ keyname = talloc_asprintf(ctx, "%s/%s", REG_SORTED_SUBKEYS_PREFIX,
+ keyname);
+ if (keyname != NULL) {
+ dbwrap_delete_bystring(db, keyname);
+ }
+
done:
TALLOC_FREE(ctx);
SAFE_FREE(buffer);
do not currently exist
***********************************************************************/
-bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr)
+static bool regdb_store_keys_internal(struct db_context *db, const char *key,
+ struct regsubkey_ctr *ctr)
{
- int num_subkeys, i;
+ int num_subkeys, old_num_subkeys, i;
char *path = NULL;
- REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
+ struct regsubkey_ctr *subkeys = NULL, *old_subkeys = NULL;
char *oldkeyname = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
- NTSTATUS status;
+ WERROR werr;
+
+ if (!regdb_key_is_base_key(key) && !regdb_key_exists(db, key)) {
+ goto fail;
+ }
/*
* fetch a list of the old subkeys so we can determine if anything has
* changed
*/
- if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
+ werr = regsubkey_ctr_init(ctx, &old_subkeys);
+ if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
return false;
}
- regdb_fetch_keys(key, old_subkeys);
+ regdb_fetch_keys_internal(db, key, old_subkeys);
- if ((ctr->num_subkeys && old_subkeys->num_subkeys) &&
- (ctr->num_subkeys == old_subkeys->num_subkeys)) {
-
- for (i = 0; i<ctr->num_subkeys; i++) {
- if (strcmp(ctr->subkeys[i],
- old_subkeys->subkeys[i]) != 0) {
+ num_subkeys = regsubkey_ctr_numkeys(ctr);
+ old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
+ if ((num_subkeys && old_num_subkeys) &&
+ (num_subkeys == old_num_subkeys)) {
+
+ for (i = 0; i < num_subkeys; i++) {
+ if (strcmp(regsubkey_ctr_specific_key(ctr, i),
+ regsubkey_ctr_specific_key(old_subkeys, i))
+ != 0)
+ {
break;
}
}
- if (i == ctr->num_subkeys) {
+ if (i == num_subkeys) {
/*
* Nothing changed, no point to even start a tdb
* transaction
TALLOC_FREE(old_subkeys);
- if (regdb->transaction_start(regdb) != 0) {
+ if (db->transaction_start(db) != 0) {
DEBUG(0, ("regdb_store_keys: transaction_start failed\n"));
goto fail;
}
* Re-fetch the old keys inside the transaction
*/
- if (!(old_subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR))) {
+ werr = regsubkey_ctr_init(ctx, &old_subkeys);
+ if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
goto cancel;
}
- regdb_fetch_keys(key, old_subkeys);
-
- /* store the subkey list for the parent */
+ regdb_fetch_keys_internal(db, key, old_subkeys);
- if (!regdb_store_keys_internal(key, ctr) ) {
- DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
- "for parent [%s]\n", key));
- goto cancel;
- }
+ /*
+ * Make the store operation as safe as possible without transactions:
+ *
+ * (1) For each subkey removed from ctr compared with old_subkeys:
+ *
+ * (a) First delete the value db entry.
+ *
+ * (b) Next delete the secdesc db record.
+ *
+ * (c) Then delete the subkey list entry.
+ *
+ * (2) Now write the list of subkeys of the parent key,
+ * deleting removed entries and adding new ones.
+ *
+ * (3) Finally create the subkey list entries for the added keys.
+ *
+ * This way if we crash half-way in between deleting the subkeys
+ * and storing the parent's list of subkeys, no old data can pop up
+ * out of the blue when re-adding keys later on.
+ */
- /* now delete removed keys */
+ /* (1) delete removed keys' lists (values/secdesc/subkeys) */
num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
for (i=0; i<num_subkeys; i++) {
if (!path) {
goto cancel;
}
- path = normalize_reg_path(ctx, path);
- if (!path) {
- goto cancel;
- }
- status = dbwrap_delete_bystring(regdb, path);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Deleting %s failed\n", path));
- goto cancel;
- }
- TALLOC_FREE(path);
- path = talloc_asprintf(ctx, "%s/%s/%s",
- REG_VALUE_PREFIX,
- key,
- oldkeyname );
- if (!path) {
- goto cancel;
- }
- path = normalize_reg_path(ctx, path);
- if (!path) {
- goto cancel;
- }
+ werr = regdb_delete_key_lists(db, path);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
- /*
- * Ignore errors here, we might have no values around
- */
- dbwrap_delete_bystring(regdb, path);
TALLOC_FREE(path);
}
TALLOC_FREE(old_subkeys);
- /* now create records for any subkeys that don't already exist */
+ /* (2) store the subkey list for the parent */
+
+ if (!regdb_store_keys_internal2(db, key, ctr)) {
+ DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
+ "for parent [%s]\n", key));
+ goto cancel;
+ }
+
+ /* (3) now create records for any subkeys that don't already exist */
num_subkeys = regsubkey_ctr_numkeys(ctr);
if (num_subkeys == 0) {
- if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
+ werr = regsubkey_ctr_init(ctx, &subkeys);
+ if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
goto cancel;
}
- if (!regdb_store_keys_internal(key, subkeys)) {
+ if (!regdb_store_keys_internal2(db, key, subkeys)) {
DEBUG(0,("regdb_store_keys: Failed to store "
"new record for key [%s]\n", key));
goto cancel;
if (!path) {
goto cancel;
}
- if (!(subkeys = TALLOC_ZERO_P(ctx, REGSUBKEY_CTR)) ) {
+ werr = regsubkey_ctr_init(ctx, &subkeys);
+ if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
goto cancel;
}
- if (regdb_fetch_keys( path, subkeys ) == -1) {
+ if (regdb_fetch_keys_internal(db, path, subkeys) == -1) {
/* create a record with 0 subkeys */
- if (!regdb_store_keys_internal(path, subkeys)) {
+ if (!regdb_store_keys_internal2(db, path, subkeys)) {
DEBUG(0,("regdb_store_keys: Failed to store "
"new record for key [%s]\n", path));
goto cancel;
TALLOC_FREE(path);
}
- if (regdb->transaction_commit(regdb) != 0) {
+ if (db->transaction_commit(db) != 0) {
DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
goto fail;
}
return true;
cancel:
- if (regdb->transaction_cancel(regdb) != 0) {
+ if (db->transaction_cancel(db) != 0) {
smb_panic("regdb_store_keys: transaction_cancel failed\n");
}
return false;
}
+bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
+{
+ return regdb_store_keys_internal(regdb, key, ctr);
+}
-static TDB_DATA regdb_fetch_key_internal(TALLOC_CTX *mem_ctx, const char *key)
+static WERROR regdb_create_subkey(const char *key, const char *subkey)
+{
+ WERROR werr;
+ struct regsubkey_ctr *subkeys;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ if (!regdb_key_is_base_key(key) && !regdb_key_exists(regdb, key)) {
+ werr = WERR_NOT_FOUND;
+ goto done;
+ }
+
+ werr = regsubkey_ctr_init(mem_ctx, &subkeys);
+ W_ERROR_NOT_OK_GOTO_DONE(werr);
+
+ if (regdb_fetch_keys_internal(regdb, key, subkeys) < 0) {
+ werr = WERR_REG_IO_FAILURE;
+ goto done;
+ }
+
+ if (regsubkey_ctr_key_exists(subkeys, subkey)) {
+ werr = WERR_OK;
+ goto done;
+ }
+
+ talloc_free(subkeys);
+
+ if (regdb->transaction_start(regdb) != 0) {
+ werr = WERR_REG_IO_FAILURE;
+ goto done;
+ }
+
+ werr = regsubkey_ctr_init(mem_ctx, &subkeys);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
+
+ if (regdb_fetch_keys_internal(regdb, key, subkeys) < 0) {
+ werr = WERR_REG_IO_FAILURE;
+ goto cancel;
+ }
+
+ werr = regsubkey_ctr_addkey(subkeys, subkey);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
+
+ if (!regdb_store_keys_internal2(regdb, key, subkeys)) {
+ DEBUG(0, (__location__ " failed to store new subkey list for "
+ "parent key %s\n", key));
+ werr = WERR_REG_IO_FAILURE;
+ goto cancel;
+ }
+
+ if (regdb->transaction_commit(regdb) != 0) {
+ werr = WERR_REG_IO_FAILURE;
+ DEBUG(0, (__location__ " failed to commit transaction\n"));
+ }
+
+ goto done;
+
+cancel:
+ if (regdb->transaction_cancel(regdb) != 0) {
+ smb_panic("regdb_create_subkey: transaction_cancel failed\n");
+ }
+
+done:
+ talloc_free(mem_ctx);
+ return werr;
+}
+
+static WERROR regdb_delete_subkey(const char *key, const char *subkey)
+{
+ WERROR werr;
+ struct regsubkey_ctr *subkeys;
+ char *path;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ if (!regdb_key_is_base_key(key) && !regdb_key_exists(regdb, key)) {
+ werr = WERR_NOT_FOUND;
+ goto done;
+ }
+
+ path = talloc_asprintf(mem_ctx, "%s/%s", key, subkey);
+ if (path == NULL) {
+ werr = WERR_NOMEM;
+ goto done;
+ }
+
+ if (!regdb_key_exists(regdb, path)) {
+ werr = WERR_OK;
+ goto done;
+ }
+
+ if (regdb->transaction_start(regdb) != 0) {
+ werr = WERR_REG_IO_FAILURE;
+ goto done;
+ }
+
+ werr = regdb_delete_key_lists(regdb, path);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
+
+ werr = regsubkey_ctr_init(mem_ctx, &subkeys);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
+
+ if (regdb_fetch_keys_internal(regdb, key, subkeys) < 0) {
+ werr = WERR_REG_IO_FAILURE;
+ goto cancel;
+ }
+
+ werr = regsubkey_ctr_delkey(subkeys, subkey);
+ W_ERROR_NOT_OK_GOTO(werr, cancel);
+
+ if (!regdb_store_keys_internal2(regdb, key, subkeys)) {
+ DEBUG(0, (__location__ " failed to store new subkey_list for "
+ "parent key %s\n", key));
+ werr = WERR_REG_IO_FAILURE;
+ goto cancel;
+ }
+
+ if (regdb->transaction_commit(regdb) != 0) {
+ DEBUG(0, (__location__ " failed to commit transaction\n"));
+ werr = WERR_REG_IO_FAILURE;
+ }
+
+ goto done;
+
+cancel:
+ if (regdb->transaction_cancel(regdb) != 0) {
+ smb_panic("regdb_delete_subkey: transaction_cancel failed\n");
+ }
+
+done:
+ talloc_free(mem_ctx);
+ return werr;
+}
+
+static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
+ TALLOC_CTX *mem_ctx, const char *key)
{
char *path = NULL;
TDB_DATA data;
return make_tdb_data(NULL, 0);
}
- data = dbwrap_fetch_bystring(regdb, mem_ctx, path);
+ data = dbwrap_fetch_bystring(db, mem_ctx, path);
TALLOC_FREE(path);
return data;
}
+/**
+ * check whether a given key name represents a base key,
+ * i.e one without a subkey separator ('/' or '\').
+ */
+static bool regdb_key_is_base_key(const char *key)
+{
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+ bool ret = false;
+ char *path;
+
+ if (key == NULL) {
+ goto done;
+ }
+
+ path = normalize_reg_path(mem_ctx, key);
+ if (path == NULL) {
+ DEBUG(0, ("out of memory! (talloc failed)\n"));
+ goto done;
+ }
+
+ if (*path == '\0') {
+ goto done;
+ }
+
+ ret = (strrchr(path, '/') == NULL);
+
+done:
+ TALLOC_FREE(mem_ctx);
+ return ret;
+}
+
+/*
+ * regdb_key_exists() is a very frequent operation. It can be quite
+ * time-consuming to fully fetch the parent's subkey list, talloc_strdup all
+ * subkeys and then compare the keyname linearly to all the parent's subkeys.
+ *
+ * The following code tries to make this operation as efficient as possible:
+ * Per registry key we create a list of subkeys that is very efficient to
+ * search for existence of a subkey. Its format is:
+ *
+ * 4 bytes num_subkeys
+ * 4*num_subkey bytes offset into the string array
+ * then follows a sorted list of subkeys in uppercase
+ *
+ * This record is created by create_sorted_subkeys() on demand if it does not
+ * exist. scan_parent_subkeys() uses regdb->parse_record to search the sorted
+ * list, the parsing code and the binary search can be found in
+ * parent_subkey_scanner. The code uses parse_record() to avoid a memcpy of
+ * the potentially large subkey record.
+ *
+ * The sorted subkey record is deleted in regdb_store_keys_internal2 and
+ * recreated on demand.
+ */
+
+static int cmp_keynames(const void *p1, const void *p2)
+{
+ return StrCaseCmp(*((char **)p1), *((char **)p2));
+}
+
+static bool create_sorted_subkeys(const char *key, const char *sorted_keyname)
+{
+ char **sorted_subkeys;
+ struct regsubkey_ctr *ctr;
+ bool result = false;
+ NTSTATUS status;
+ char *buf;
+ char *p;
+ int i, res;
+ size_t len;
+ int num_subkeys;
+ WERROR werr;
+
+ if (regdb->transaction_start(regdb) != 0) {
+ DEBUG(0, ("create_sorted_subkeys: transaction_start "
+ "failed\n"));
+ return false;
+ }
+
+ werr = regsubkey_ctr_init(talloc_tos(), &ctr);
+ if (!W_ERROR_IS_OK(werr)) {
+ goto fail;
+ }
+
+ res = regdb_fetch_keys_internal(regdb, key, ctr);
+ if (res == -1) {
+ goto fail;
+ }
+
+ num_subkeys = regsubkey_ctr_numkeys(ctr);
+ sorted_subkeys = talloc_array(ctr, char *, num_subkeys);
+ if (sorted_subkeys == NULL) {
+ goto fail;
+ }
+
+ len = 4 + 4*num_subkeys;
+
+ for (i = 0; i < num_subkeys; i++) {
+ sorted_subkeys[i] = talloc_strdup_upper(sorted_subkeys,
+ regsubkey_ctr_specific_key(ctr, i));
+ if (sorted_subkeys[i] == NULL) {
+ goto fail;
+ }
+ len += strlen(sorted_subkeys[i])+1;
+ }
+
+ qsort(sorted_subkeys, num_subkeys, sizeof(char *), cmp_keynames);
+
+ buf = talloc_array(ctr, char, len);
+ if (buf == NULL) {
+ goto fail;
+ }
+ p = buf + 4 + 4*num_subkeys;
+
+ SIVAL(buf, 0, num_subkeys);
+
+ for (i=0; i < num_subkeys; i++) {
+ ptrdiff_t offset = p - buf;
+ SIVAL(buf, 4 + 4*i, offset);
+ strlcpy(p, sorted_subkeys[i], len-offset);
+ p += strlen(sorted_subkeys[i]) + 1;
+ }
+
+ status = dbwrap_store_bystring(
+ regdb, sorted_keyname, make_tdb_data((uint8_t *)buf, len),
+ TDB_REPLACE);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * Don't use a "goto fail;" here, this would commit the broken
+ * transaction. See below for an explanation.
+ */
+ if (regdb->transaction_cancel(regdb) == -1) {
+ DEBUG(0, ("create_sorted_subkeys: transaction_cancel "
+ "failed\n"));
+ }
+ TALLOC_FREE(ctr);
+ return false;
+ }
+
+ result = true;
+ fail:
+ /*
+ * We only get here via the "goto fail" when we did not write anything
+ * yet. Using transaction_commit even in a failure case is necessary
+ * because this (disposable) call might be nested in other
+ * transactions. Doing a cancel here would destroy the possibility of
+ * a transaction_commit for transactions that we might be wrapped in.
+ */
+ if (regdb->transaction_commit(regdb) == -1) {
+ DEBUG(0, ("create_sorted_subkeys: transaction_commit "
+ "failed\n"));
+ result = false;
+ }
+
+ TALLOC_FREE(ctr);
+ return result;
+}
+
+struct scan_subkey_state {
+ char *name;
+ bool scanned;
+ bool found;
+};
+
+static int parent_subkey_scanner(TDB_DATA key, TDB_DATA data,
+ void *private_data)
+{
+ struct scan_subkey_state *state =
+ (struct scan_subkey_state *)private_data;
+ uint32_t num_subkeys;
+ uint32_t l, u;
+
+ if (data.dsize < sizeof(uint32_t)) {
+ return -1;
+ }
+
+ state->scanned = true;
+ state->found = false;
+
+ tdb_unpack(data.dptr, data.dsize, "d", &num_subkeys);
+
+ l = 0;
+ u = num_subkeys;
+
+ while (l < u) {
+ uint32_t idx = (l+u)/2;
+ char *s = (char *)data.dptr + IVAL(data.dptr, 4 + 4*idx);
+ int comparison = strcmp(state->name, s);
+
+ if (comparison < 0) {
+ u = idx;
+ } else if (comparison > 0) {
+ l = idx + 1;
+ } else {
+ state->found = true;
+ return 0;
+ }
+ }
+ return 0;
+}
+
+static bool scan_parent_subkeys(struct db_context *db, const char *parent,
+ const char *name)
+{
+ char *path = NULL;
+ char *key = NULL;
+ struct scan_subkey_state state = { 0, };
+ bool result = false;
+ int res;
+
+ state.name = NULL;
+
+ path = normalize_reg_path(talloc_tos(), parent);
+ if (path == NULL) {
+ goto fail;
+ }
+
+ key = talloc_asprintf(talloc_tos(), "%s/%s",
+ REG_SORTED_SUBKEYS_PREFIX, path);
+ if (key == NULL) {
+ goto fail;
+ }
+
+ state.name = talloc_strdup_upper(talloc_tos(), name);
+ if (state.name == NULL) {
+ goto fail;
+ }
+ state.scanned = false;
+
+ res = db->parse_record(db, string_term_tdb_data(key),
+ parent_subkey_scanner, &state);
+
+ if (state.scanned) {
+ result = state.found;
+ } else {
+ if (!create_sorted_subkeys(path, key)) {
+ goto fail;
+ }
+ res = db->parse_record(db, string_term_tdb_data(key),
+ parent_subkey_scanner, &state);
+ if ((res == 0) && (state.scanned)) {
+ result = state.found;
+ }
+ }
+
+ fail:
+ TALLOC_FREE(path);
+ TALLOC_FREE(state.name);
+ return result;
+}
+
/**
* Check for the existence of a key.
*
* The exeption of this are keys without a parent key,
* i.e. the "base" keys (HKLM, HKCU, ...).
*/
-static bool regdb_key_exists(const char *key)
+static bool regdb_key_exists(struct db_context *db, const char *key)
{
TALLOC_CTX *mem_ctx = talloc_stackframe();
TDB_DATA value;
p = strrchr(path, '/');
if (p == NULL) {
/* this is a base key */
- value = regdb_fetch_key_internal(mem_ctx, path);
+ value = regdb_fetch_key_internal(db, mem_ctx, path);
ret = (value.dptr != NULL);
} else {
- /* get the list of subkeys of the parent key */
- uint32 num_items, len, i;
- fstring subkeyname;
-
*p = '\0';
- p++;
- value = regdb_fetch_key_internal(mem_ctx, path);
- if (value.dptr == NULL) {
- goto done;
- }
-
- len = tdb_unpack(value.dptr, value.dsize, "d", &num_items);
- for (i = 0; i < num_items; i++) {
- len += tdb_unpack(value.dptr +len, value.dsize -len,
- "f", &subkeyname);
- if (strequal(subkeyname, p)) {
- ret = true;
- goto done;
- }
- }
+ ret = scan_parent_subkeys(db, path, p+1);
}
done:
released by the caller.
***********************************************************************/
-int regdb_fetch_keys(const char *key, REGSUBKEY_CTR *ctr)
+static int regdb_fetch_keys_internal(struct db_context *db, const char *key,
+ struct regsubkey_ctr *ctr)
{
WERROR werr;
uint32 num_items;
DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
- if (!regdb_key_exists(key)) {
- goto fail;
+ if (!regdb_key_exists(db, key)) {
+ goto done;
}
- ctr->seqnum = regdb_get_seqnum();
-
- value = regdb_fetch_key_internal(frame, key);
+ werr = regsubkey_ctr_set_seqnum(ctr, db->get_seqnum(db));
+ if (!W_ERROR_IS_OK(werr)) {
+ goto done;
+ }
- buf = value.dptr;
- buflen = value.dsize;
+ value = regdb_fetch_key_internal(db, frame, key);
- if ( !buf ) {
- DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
- goto fail;
+ if (value.dptr == NULL) {
+ DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
+ key));
+ ret = 0;
+ goto done;
}
+ buf = value.dptr;
+ buflen = value.dsize;
len = tdb_unpack( buf, buflen, "d", &num_items);
for (i=0; i<num_items; i++) {
werr = regsubkey_ctr_addkey(ctr, subkeyname);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
- "failed: %s\n", dos_errstr(werr)));
- goto fail;
+ "failed: %s\n", win_errstr(werr)));
+ goto done;
}
}
DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
ret = num_items;
- fail:
+done:
TALLOC_FREE(frame);
return ret;
}
+int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
+{
+ return regdb_fetch_keys_internal(regdb, key, ctr);
+}
+
/****************************************************************************
Unpack a list of registry values frem the TDB
***************************************************************************/
-static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
+static int regdb_unpack_values(struct regval_ctr *values, uint8 *buf, int buflen)
{
int len = 0;
uint32 type;
Pack all values in all printer keys
***************************************************************************/
-static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
+static int regdb_pack_values(struct regval_ctr *values, uint8 *buf, int buflen)
{
int len = 0;
int i;
- REGISTRY_VALUE *val;
+ struct regval_blob *val;
int num_values;
if ( !values )
released by the caller.
***********************************************************************/
-int regdb_fetch_values( const char* key, REGVAL_CTR *values )
+int regdb_fetch_values(const char* key, struct regval_ctr *values)
{
char *keystr = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
- if (!regdb_key_exists(key)) {
+ if (!regdb_key_exists(regdb, key)) {
goto done;
}
values->seqnum = regdb_get_seqnum();
- value = regdb_fetch_key_internal(ctx, keystr);
+ value = regdb_fetch_key_internal(regdb, ctx, keystr);
if (!value.dptr) {
/* all keys have zero values by default */
return ret;
}
-bool regdb_store_values( const char *key, REGVAL_CTR *values )
+bool regdb_store_values(const char *key, struct regval_ctr *values)
{
TDB_DATA old_data, data;
char *keystr = NULL;
DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
+ if (!regdb_key_exists(regdb, key)) {
+ goto done;
+ }
+
ZERO_STRUCT(data);
len = regdb_pack_values(values, data.dptr, data.dsize);
goto done;
}
- status = dbwrap_trans_store(regdb, string_term_tdb_data(keystr), data,
- TDB_REPLACE);
+ status = dbwrap_trans_store_bystring(regdb, keystr, data, TDB_REPLACE);
result = NT_STATUS_IS_OK(status);
DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
+ if (!regdb_key_exists(regdb, key)) {
+ err = WERR_BADFILE;
+ goto done;
+ }
+
tdbkey = talloc_asprintf(tmp_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
if (tdbkey == NULL) {
err = WERR_NOMEM;
{
TALLOC_CTX *mem_ctx = talloc_stackframe();
char *tdbkey;
- NTSTATUS status;
WERROR err = WERR_NOMEM;
TDB_DATA tdbdata;
+ if (!regdb_key_exists(regdb, key)) {
+ err = WERR_BADFILE;
+ goto done;
+ }
+
tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX, key);
if (tdbkey == NULL) {
goto done;
if (secdesc == NULL) {
/* assuming a delete */
- status = dbwrap_trans_delete(regdb,
- string_term_tdb_data(tdbkey));
- if (NT_STATUS_IS_OK(status)) {
- err = WERR_OK;
- } else {
- err = ntstatus_to_werror(status);
- }
+ err = ntstatus_to_werror(dbwrap_trans_delete_bystring(regdb,
+ tdbkey));
goto done;
}
err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
&tdbdata.dptr,
&tdbdata.dsize));
- if (!W_ERROR_IS_OK(err)) {
- goto done;
- }
+ W_ERROR_NOT_OK_GOTO_DONE(err);
- status = dbwrap_trans_store(regdb, string_term_tdb_data(tdbkey),
- tdbdata, 0);
- if (!NT_STATUS_IS_OK(status)) {
- err = ntstatus_to_werror(status);
- goto done;
- }
+ err = ntstatus_to_werror(dbwrap_trans_store_bystring(regdb, tdbkey,
+ tdbdata, 0));
done:
TALLOC_FREE(mem_ctx);
return err;
}
-bool regdb_subkeys_need_update(REGSUBKEY_CTR *subkeys)
+bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
{
- return (regdb_get_seqnum() != subkeys->seqnum);
+ return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
}
-bool regdb_values_need_update(REGVAL_CTR *values)
+bool regdb_values_need_update(struct regval_ctr *values)
{
return (regdb_get_seqnum() != values->seqnum);
}
* Table of function pointers for default access
*/
-REGISTRY_OPS regdb_ops = {
+struct registry_ops regdb_ops = {
.fetch_subkeys = regdb_fetch_keys,
.fetch_values = regdb_fetch_values,
.store_subkeys = regdb_store_keys,
.store_values = regdb_store_values,
+ .create_subkey = regdb_create_subkey,
+ .delete_subkey = regdb_delete_subkey,
.get_secdesc = regdb_get_secdesc,
.set_secdesc = regdb_set_secdesc,
.subkeys_need_update = regdb_subkeys_need_update,
git.samba.org / ira / wip.git / blobdiff