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89d80c1b0b
Define my_thread_id as an unsigned type, to avoid mismatch with ulonglong. Change some parameters to this type. Use size_t in a few more places. Declare many flag constants as unsigned to avoid sign mismatch when shifting bits or applying the unary ~ operator. When applying the unary ~ operator to enum constants, explictly cast the result to an unsigned type, because enum constants can be treated as signed. In InnoDB, change the source code line number parameters from ulint to unsigned type. Also, make some InnoDB functions return a narrower type (unsigned or uint32_t instead of ulint; bool instead of ibool).
119 lines
3.4 KiB
Text
119 lines
3.4 KiB
Text
/*****************************************************************************
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Copyright (c) 2015, 2017, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/fil0crypt.ic
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The low-level file system encryption support functions
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Created 04/01/2015 Jan Lindström
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*******************************************************/
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/*******************************************************************//**
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Find out whether the page is page encrypted
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@return true if page is page encrypted, false if not */
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UNIV_INLINE
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bool
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fil_page_is_encrypted(
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/*==================*/
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const byte *buf) /*!< in: page */
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{
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return(mach_read_from_4(buf+FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION) != 0);
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}
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/*******************************************************************//**
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Find out whether the page can be decrypted.
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The function for decrypting the page should already be executed before this.
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@return 1 if key provider not available or key is not available
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0 if decryption should be possible
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*/
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UNIV_INLINE
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bool
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fil_page_encryption_status(
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/*===================*/
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const byte *buf, /*!< in: page */
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ulint space_id) /*!< in: space_id */
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{
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space_id);
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ulint page_type = mach_read_from_2(buf+FIL_PAGE_TYPE);
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if (page_type == FIL_PAGE_TYPE_FSP_HDR) {
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if (crypt_data != NULL) {
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if (!encryption_key_id_exists(crypt_data->key_id)) {
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/* accessing table would surely fail, because no key or no key provider available */
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return 1;
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}
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}
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} else {
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unsigned key = mach_read_from_4(buf + FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION);
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if (!encryption_key_version_exists(crypt_data->key_id, key)) {
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return 1;
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}
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}
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return 0;
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}
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/*******************************************************************//**
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Get current encryption mode from crypt_data.
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@return string representation */
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UNIV_INLINE
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const char *
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fil_crypt_get_mode(
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/*===============*/
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const fil_space_crypt_t* crypt_data)
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{
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ut_ad(crypt_data != NULL);
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switch(crypt_data->encryption) {
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case FIL_SPACE_ENCRYPTION_DEFAULT:
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return("Default tablespace encryption mode");
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break;
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case FIL_SPACE_ENCRYPTION_ON:
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return("Tablespace encrypted");
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break;
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case FIL_SPACE_ENCRYPTION_OFF:
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return("Tablespace not encrypted");
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break;
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default:
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ut_error;
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}
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return ("NULL");
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}
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/*******************************************************************//**
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Get current encryption type from crypt_data.
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@return string representation */
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UNIV_INLINE
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const char *
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fil_crypt_get_type(
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const fil_space_crypt_t* crypt_data)
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{
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ut_ad(crypt_data != NULL);
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switch (crypt_data->type) {
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case CRYPT_SCHEME_UNENCRYPTED:
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return("scheme unencrypted");
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break;
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case CRYPT_SCHEME_1:
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return("scheme encrypted");
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break;
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default:
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ut_error;
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}
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return ("NULL");
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}
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