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https://github.com/MariaDB/server.git
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MDEV-8164: Server crashes in pfs_mutex_enter_func after fil_crypt_is_closing or alike
Analysis: Problem was that tablespaces not encrypted might not have crypt_data stored on disk. Fixed by always creating crypt_data to memory cache of the tablespace. MDEV-8138: strange results from encrypt-and-grep test Analysis: crypt_data->type is not updated correctly on memory cache. This caused problem with state tranfer on encrypted => unencrypted => encrypted. Fixed by updating memory cache of crypt_data->type correctly based on current srv_encrypt_tables value to either CRYPT_SCHEME_1 or CRYPT_SCHEME_UNENCRYPTED.
This commit is contained in:
Jan Lindström
parent
476dfb1603
commit
20c23048c1
17 changed files with 991 additions and 247 deletions
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@ -43,6 +43,8 @@ Modified Jan Lindström jan.lindstrom@mariadb.com
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/** Mutex for keys */
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UNIV_INTERN ib_mutex_t fil_crypt_key_mutex;
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static bool fil_crypt_threads_inited = false;
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#ifdef UNIV_PFS_MUTEX
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UNIV_INTERN mysql_pfs_key_t fil_crypt_key_mutex_key;
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#endif
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@ -107,6 +109,8 @@ UNIV_INTERN mysql_pfs_key_t fil_crypt_data_mutex_key;
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static bool
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fil_crypt_needs_rotation(
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/*=====================*/
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fil_encryption_t encrypt_mode, /*!< in: Encryption
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mode */
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uint key_version, /*!< in: Key version */
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uint latest_key_version, /*!< in: Latest key version */
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uint rotate_key_age); /*!< in: When to rotate */
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@ -154,13 +158,14 @@ Get the latest(key-version), waking the encrypt thread, if needed */
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static inline
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uint
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fil_crypt_get_latest_key_version(
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/*=====================*/
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/*=============================*/
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fil_space_crypt_t* crypt_data) /*!< in: crypt data */
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{
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uint rc = encryption_key_get_latest_version(crypt_data->key_id);
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if (fil_crypt_needs_rotation(crypt_data->min_key_version,
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rc, srv_fil_crypt_rotate_key_age)) {
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if (fil_crypt_needs_rotation(crypt_data->encryption,
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crypt_data->min_key_version,
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rc, srv_fil_crypt_rotate_key_age)) {
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os_event_set(fil_crypt_threads_event);
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}
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@ -169,7 +174,12 @@ fil_crypt_get_latest_key_version(
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/******************************************************************
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Mutex helper for crypt_data->scheme */
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static void crypt_data_scheme_locker(st_encryption_scheme *scheme, int exit)
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static
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void
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crypt_data_scheme_locker(
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/*=====================*/
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st_encryption_scheme* scheme,
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int exit)
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{
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fil_space_crypt_t* crypt_data =
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static_cast<fil_space_crypt_t*>(scheme);
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@ -220,7 +230,7 @@ Merge fil_space_crypt_t object */
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UNIV_INTERN
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void
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fil_space_merge_crypt_data(
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/*====================*/
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/*=======================*/
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fil_space_crypt_t* dst,/*!< out: Crypt data */
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const fil_space_crypt_t* src)/*!< in: Crypt data */
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{
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@ -236,6 +246,7 @@ fil_space_merge_crypt_data(
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/* no support for changing iv (yet?) */
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ut_a(memcmp(src->iv, dst->iv, sizeof(src->iv)) == 0);
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dst->encryption = src->encryption;
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dst->type = src->type;
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dst->min_key_version = src->min_key_version;
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dst->keyserver_requests += src->keyserver_requests;
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@ -255,8 +266,13 @@ fil_space_read_crypt_data(
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ulint offset) /*!< in: offset */
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{
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if (memcmp(page + offset, EMPTY_PATTERN, MAGIC_SZ) == 0) {
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/* crypt is not stored */
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return NULL;
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/* crypt is not stored but create memory cache for
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not system tablespace */
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if (space != 0) {
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return fil_space_create_crypt_data(FIL_SPACE_ENCRYPTION_DEFAULT, FIL_DEFAULT_ENCRYPTION_KEY);
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} else {
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return NULL;
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}
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}
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if (memcmp(page + offset, CRYPT_MAGIC, MAGIC_SZ) != 0) {
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@ -272,7 +288,12 @@ fil_space_read_crypt_data(
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page[offset + 3],
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page[offset + 4],
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page[offset + 5]);
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return NULL;
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/* Create memory cache for not system tablespace */
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if (space != 0) {
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return fil_space_create_crypt_data(FIL_SPACE_ENCRYPTION_DEFAULT, FIL_DEFAULT_ENCRYPTION_KEY);
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} else {
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return NULL;
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}
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}
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ulint type = mach_read_from_1(page + offset + MAGIC_SZ + 0);
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@ -542,11 +563,12 @@ Check if page shall be encrypted before write
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UNIV_INTERN
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bool
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fil_space_check_encryption_write(
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/*==============================*/
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ulint space) /*!< in: tablespace id */
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/*=============================*/
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ulint space) /*!< in: tablespace id */
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{
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if (!srv_encrypt_tables)
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if (!srv_encrypt_tables) {
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return false;
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}
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fil_space_crypt_t* crypt_data = fil_space_get_crypt_data(space);
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@ -599,6 +621,8 @@ fil_space_encrypt(
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return;
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}
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ut_ad(crypt_data->encryption != FIL_SPACE_ENCRYPTION_OFF);
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key_version = fil_crypt_get_latest_key_version(crypt_data);
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if (key_version == ENCRYPTION_KEY_VERSION_INVALID) {
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@ -742,6 +766,8 @@ fil_space_decrypt(
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return false; /* page not decrypted */
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}
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ut_ad(crypt_data->encryption != FIL_SPACE_ENCRYPTION_OFF);
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/* read space & offset & lsn */
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ulint space = mach_read_from_4(
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src_frame + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
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@ -937,12 +963,15 @@ Check if a key needs rotation given a key_state
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static bool
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fil_crypt_needs_rotation(
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/*=====================*/
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fil_encryption_t encrypt_mode, /*!< in: Encryption
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mode */
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uint key_version, /*!< in: Key version */
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uint latest_key_version, /*!< in: Latest key version */
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uint rotate_key_age) /*!< in: When to rotate */
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{
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if (key_version == ENCRYPTION_KEY_VERSION_INVALID)
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if (key_version == ENCRYPTION_KEY_VERSION_INVALID) {
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return false;
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}
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if (key_version == 0 && latest_key_version != 0) {
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/* this is rotation unencrypted => encrypted
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@ -951,8 +980,11 @@ fil_crypt_needs_rotation(
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}
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if (latest_key_version == 0 && key_version != 0) {
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/* this is rotation encrypted => unencrypted */
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return true;
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if (encrypt_mode == FIL_SPACE_ENCRYPTION_DEFAULT) {
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/* this is rotation encrypted => unencrypted */
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return true;
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}
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return false;
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}
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/* this is rotation encrypted => encrypted,
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@ -973,11 +1005,15 @@ fil_crypt_is_closing(
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/*=================*/
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ulint space) /*!< in: FIL space id */
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{
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bool closing;
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bool closing=true;
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space);
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mutex_enter(&crypt_data->mutex);
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closing = crypt_data->closing;
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mutex_exit(&crypt_data->mutex);
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if (crypt_data) {
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mutex_enter(&crypt_data->mutex);
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closing = crypt_data->closing;
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mutex_exit(&crypt_data->mutex);
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}
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return closing;
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}
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@ -1189,6 +1225,7 @@ Check if space needs rotation given a key_state
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static
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bool
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fil_crypt_space_needs_rotation(
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/*===========================*/
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rotate_thread_t* state, /*!< in: Key rotation state */
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key_state_t* key_state, /*!< in: Key state */
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bool* recheck) /*!< out: needs recheck ? */
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@ -1228,11 +1265,6 @@ fil_crypt_space_needs_rotation(
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mutex_enter(&crypt_data->mutex);
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do {
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if (crypt_data->encryption == FIL_SPACE_ENCRYPTION_OFF) {
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/* This space is unencrypted by user request */
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break;
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}
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/* prevent threads from starting to rotate space */
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if (crypt_data->rotate_state.starting) {
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/* recheck this space later */
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@ -1255,6 +1287,7 @@ fil_crypt_space_needs_rotation(
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}
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bool need_key_rotation = fil_crypt_needs_rotation(
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crypt_data->encryption,
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crypt_data->min_key_version,
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key_state->key_version, key_state->rotate_key_age);
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@ -1351,7 +1384,7 @@ used when inside a space */
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static
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void
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fil_crypt_realloc_iops(
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/*========================*/
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/*===================*/
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rotate_thread_t *state) /*!< in: Key rotation status */
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{
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ut_a(state->allocated_iops > 0);
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@ -1444,7 +1477,7 @@ Return allocated iops to global */
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static
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void
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fil_crypt_return_iops(
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/*========================*/
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/*==================*/
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rotate_thread_t *state) /*!< in: Key rotation status */
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{
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if (state->allocated_iops > 0) {
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@ -1526,11 +1559,17 @@ fil_crypt_start_rotate_space(
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ulint space = state->space;
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space);
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ut_ad(crypt_data);
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mutex_enter(&crypt_data->mutex);
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ut_ad(key_state->key_id == crypt_data->key_id);
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if (crypt_data->rotate_state.active_threads == 0) {
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/* only first thread needs to init */
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if (crypt_data->encryption == FIL_SPACE_ENCRYPTION_OFF) {
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crypt_data->type = CRYPT_SCHEME_UNENCRYPTED;
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} else {
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crypt_data->type = CRYPT_SCHEME_1;
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}
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crypt_data->rotate_state.next_offset = 1; // skip page 0
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/* no need to rotate beyond current max
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* if space extends, it will be encrypted with newer version */
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@ -1568,28 +1607,33 @@ fil_crypt_find_page_to_rotate(
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ulint space = state->space;
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space);
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mutex_enter(&crypt_data->mutex);
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ut_ad(key_state->key_id == crypt_data->key_id);
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/* Space might already be dropped */
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if (crypt_data) {
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mutex_enter(&crypt_data->mutex);
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ut_ad(key_state->key_id == crypt_data->key_id);
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if (crypt_data->closing == false &&
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crypt_data->rotate_state.next_offset <
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crypt_data->rotate_state.max_offset) {
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if (crypt_data->closing == false &&
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crypt_data->rotate_state.next_offset <
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crypt_data->rotate_state.max_offset) {
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state->offset = crypt_data->rotate_state.next_offset;
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ulint remaining = crypt_data->rotate_state.max_offset -
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crypt_data->rotate_state.next_offset;
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state->offset = crypt_data->rotate_state.next_offset;
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ulint remaining = crypt_data->rotate_state.max_offset -
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crypt_data->rotate_state.next_offset;
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if (batch <= remaining)
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state->batch = batch;
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else
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state->batch = remaining;
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if (batch <= remaining) {
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state->batch = batch;
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} else {
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state->batch = remaining;
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}
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crypt_data->rotate_state.next_offset += batch;
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mutex_exit(&crypt_data->mutex);
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return true;
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}
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crypt_data->rotate_state.next_offset += batch;
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mutex_exit(&crypt_data->mutex);
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return true;
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}
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mutex_exit(&crypt_data->mutex);
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return false;
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}
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@ -1636,6 +1680,7 @@ Get a page and compute sleep time
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static
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buf_block_t*
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fil_crypt_get_page_throttle_func(
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/*=============================*/
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rotate_thread_t* state, /*!< in/out: Key rotation state */
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ulint space, /*!< in: FIL space id */
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uint zip_size, /*!< in: compressed size if
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@ -1752,7 +1797,7 @@ Rotate one page */
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static
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void
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fil_crypt_rotate_page(
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/*===================*/
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/*==================*/
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const key_state_t* key_state, /*!< in: Key state */
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rotate_thread_t* state) /*!< in: Key rotation state */
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{
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@ -1791,8 +1836,10 @@ fil_crypt_rotate_page(
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if (kv == 0 &&
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fil_crypt_is_page_uninitialized(frame, zip_size)) {
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;
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} else if (fil_crypt_needs_rotation(kv, key_state->key_version,
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key_state->rotate_key_age)) {
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} else if (fil_crypt_needs_rotation(
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crypt_data->encryption,
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kv, key_state->key_version,
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key_state->rotate_key_age)) {
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/* page can be "fresh" i.e never written in case
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* kv == 0 or it should have a key version at least
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@ -1812,11 +1859,13 @@ fil_crypt_rotate_page(
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/* statistics */
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state->crypt_stat.pages_modified++;
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} else {
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ut_a(kv >= crypt_data->min_key_version ||
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(kv == 0 && key_state->key_version == 0));
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if (crypt_data->encryption != FIL_SPACE_ENCRYPTION_OFF) {
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ut_a(kv >= crypt_data->min_key_version ||
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(kv == 0 && key_state->key_version == 0));
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if (kv < state->min_key_version_found) {
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state->min_key_version_found = kv;
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if (kv < state->min_key_version_found) {
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state->min_key_version_found = kv;
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}
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}
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}
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@ -1878,6 +1927,7 @@ fil_crypt_rotate_page(
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/* if we just detected that scrubbing was turned off
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* update global state to reflect this */
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space);
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ut_ad(crypt_data);
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mutex_enter(&crypt_data->mutex);
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crypt_data->rotate_state.scrubbing.is_active = false;
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mutex_exit(&crypt_data->mutex);
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@ -2006,68 +2056,73 @@ fil_crypt_complete_rotate_space(
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{
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ulint space = state->space;
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fil_space_crypt_t *crypt_data = fil_space_get_crypt_data(space);
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mutex_enter(&crypt_data->mutex);
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/**
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* Update crypt data state with state from thread
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*/
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if (state->min_key_version_found <
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crypt_data->rotate_state.min_key_version_found) {
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crypt_data->rotate_state.min_key_version_found =
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state->min_key_version_found;
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}
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/* Space might already be dropped */
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if (crypt_data) {
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ut_ad(crypt_data);
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mutex_enter(&crypt_data->mutex);
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if (state->end_lsn > crypt_data->rotate_state.end_lsn) {
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crypt_data->rotate_state.end_lsn = state->end_lsn;
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}
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/**
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* Update crypt data state with state from thread
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*/
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if (state->min_key_version_found <
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crypt_data->rotate_state.min_key_version_found) {
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crypt_data->rotate_state.min_key_version_found =
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state->min_key_version_found;
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}
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ut_a(crypt_data->rotate_state.active_threads > 0);
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crypt_data->rotate_state.active_threads--;
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bool last = crypt_data->rotate_state.active_threads == 0;
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if (state->end_lsn > crypt_data->rotate_state.end_lsn) {
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crypt_data->rotate_state.end_lsn = state->end_lsn;
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}
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/**
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* check if space is fully done
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* this as when threads shutdown, it could be that we "complete"
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* iterating before we have scanned the full space.
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*/
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bool done = crypt_data->rotate_state.next_offset >=
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crypt_data->rotate_state.max_offset;
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ut_a(crypt_data->rotate_state.active_threads > 0);
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crypt_data->rotate_state.active_threads--;
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bool last = crypt_data->rotate_state.active_threads == 0;
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/**
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* we should flush space if we're last thread AND
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* the iteration is done
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*/
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bool should_flush = last && done;
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/**
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* check if space is fully done
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* this as when threads shutdown, it could be that we "complete"
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* iterating before we have scanned the full space.
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*/
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bool done = crypt_data->rotate_state.next_offset >=
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crypt_data->rotate_state.max_offset;
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if (should_flush) {
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/* we're the last active thread */
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crypt_data->rotate_state.flushing = true;
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crypt_data->min_key_version =
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crypt_data->rotate_state.min_key_version_found;
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}
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/**
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* we should flush space if we're last thread AND
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* the iteration is done
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*/
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bool should_flush = last && done;
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/* inform scrubbing */
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crypt_data->rotate_state.scrubbing.is_active = false;
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mutex_exit(&crypt_data->mutex);
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/* all threads must call btr_scrub_complete_space wo/ mutex held */
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if (btr_scrub_complete_space(&state->scrub_data) == true) {
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if (should_flush) {
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/* only last thread updates last_scrub_completed */
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/* we're the last active thread */
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crypt_data->rotate_state.flushing = true;
|
||||
crypt_data->min_key_version =
|
||||
crypt_data->rotate_state.min_key_version_found;
|
||||
}
|
||||
|
||||
/* inform scrubbing */
|
||||
crypt_data->rotate_state.scrubbing.is_active = false;
|
||||
mutex_exit(&crypt_data->mutex);
|
||||
|
||||
/* all threads must call btr_scrub_complete_space wo/ mutex held */
|
||||
if (btr_scrub_complete_space(&state->scrub_data) == true) {
|
||||
if (should_flush) {
|
||||
/* only last thread updates last_scrub_completed */
|
||||
mutex_enter(&crypt_data->mutex);
|
||||
crypt_data->rotate_state.scrubbing.
|
||||
last_scrub_completed = time(0);
|
||||
mutex_exit(&crypt_data->mutex);
|
||||
}
|
||||
}
|
||||
|
||||
if (should_flush) {
|
||||
fil_crypt_flush_space(state, space);
|
||||
|
||||
mutex_enter(&crypt_data->mutex);
|
||||
crypt_data->rotate_state.scrubbing.
|
||||
last_scrub_completed = time(0);
|
||||
crypt_data->rotate_state.flushing = false;
|
||||
mutex_exit(&crypt_data->mutex);
|
||||
}
|
||||
}
|
||||
|
||||
if (should_flush) {
|
||||
fil_crypt_flush_space(state, space);
|
||||
|
||||
mutex_enter(&crypt_data->mutex);
|
||||
crypt_data->rotate_state.flushing = false;
|
||||
mutex_exit(&crypt_data->mutex);
|
||||
}
|
||||
}
|
||||
|
||||
/*********************************************************************//**
|
||||
|
|
@ -2194,8 +2249,8 @@ fil_crypt_set_thread_cnt(
|
|||
os_thread_id_t rotation_thread_id;
|
||||
os_thread_create(fil_crypt_thread, NULL, &rotation_thread_id);
|
||||
ib_logf(IB_LOG_LEVEL_INFO,
|
||||
"Creating #%d thread id %lu total threads %du\n",
|
||||
i, os_thread_pf(rotation_thread_id), new_cnt);
|
||||
"Creating #%d thread id %lu total threads %u\n",
|
||||
i+1, os_thread_pf(rotation_thread_id), new_cnt);
|
||||
}
|
||||
} else if (new_cnt < srv_n_fil_crypt_threads) {
|
||||
srv_n_fil_crypt_threads = new_cnt;
|
||||
|
|
@ -2232,6 +2287,18 @@ fil_crypt_set_rotation_iops(
|
|||
os_event_set(fil_crypt_threads_event);
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
Adjust encrypt tables */
|
||||
UNIV_INTERN
|
||||
void
|
||||
fil_crypt_set_encrypt_tables(
|
||||
/*=========================*/
|
||||
uint val) /*!< in: New srv_encrypt_tables setting */
|
||||
{
|
||||
srv_encrypt_tables = val;
|
||||
os_event_set(fil_crypt_threads_event);
|
||||
}
|
||||
|
||||
/*********************************************************************
|
||||
Init threads for key rotation */
|
||||
UNIV_INTERN
|
||||
|
|
@ -2243,6 +2310,7 @@ fil_crypt_threads_init()
|
|||
fil_crypt_threads_event = os_event_create();
|
||||
mutex_create(fil_crypt_threads_mutex_key,
|
||||
&fil_crypt_threads_mutex, SYNC_NO_ORDER_CHECK);
|
||||
fil_crypt_threads_inited = true;
|
||||
|
||||
uint cnt = srv_n_fil_crypt_threads;
|
||||
srv_n_fil_crypt_threads = 0;
|
||||
|
|
@ -2279,7 +2347,7 @@ fil_space_crypt_mark_space_closing(
|
|||
/*===============================*/
|
||||
ulint space) /*!< in: Space id */
|
||||
{
|
||||
if (!srv_encrypt_tables) {
|
||||
if (!fil_crypt_threads_inited) {
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue