/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2.0, as published by the Free Software Foundation. This program is also distributed with certain software (including but not limited to OpenSSL) that is licensed under separate terms, as designated in a particular file or component or in included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the separately licensed software that they have included with MySQL. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0, for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "my_config.h" #include #include #include #include "my_dbug.h" #include "my_inttypes.h" #include "my_macros.h" #include "storage/myisam/myisamdef.h" #ifdef HAVE_SYS_MMAN_H #include #endif static void mi_extra_keyflag(MI_INFO *info, enum ha_extra_function function); /* Set options and buffers to optimize table handling SYNOPSIS mi_extra() info open table function operation extra_arg Pointer to extra argument (normally pointer to ulong) Not used. RETURN VALUES 0 ok # error */ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg) { int error = 0; MYISAM_SHARE *share = info->s; DBUG_TRACE; DBUG_PRINT("enter", ("function: %d", (int)function)); switch (function) { case HA_EXTRA_RESET_STATE: /* Reset state (don't free buffers) */ info->lastinx = 0; /* Use first index as def */ info->last_search_keypage = info->lastpos = HA_OFFSET_ERROR; info->page_changed = 1; /* Next/prev gives first/last */ if (info->opt_flag & READ_CACHE_USED) { reinit_io_cache(&info->rec_cache, READ_CACHE, 0, (bool)(info->lock_type != F_UNLCK), (bool)(info->update & HA_STATE_ROW_CHANGED)); } info->update = ((info->update & HA_STATE_CHANGED) | HA_STATE_NEXT_FOUND | HA_STATE_PREV_FOUND); break; case HA_EXTRA_PREPARE_FOR_UPDATE: if (info->s->data_file_type != DYNAMIC_RECORD) break; /* Remove read/write cache if dynamic rows */ // Fall through. case HA_EXTRA_NO_READCHECK: info->opt_flag &= ~READ_CHECK_USED; /* No readcheck */ break; case HA_EXTRA_READCHECK: info->opt_flag |= READ_CHECK_USED; break; case HA_EXTRA_KEYREAD: /* Read only keys to record */ case HA_EXTRA_REMEMBER_POS: info->opt_flag |= REMEMBER_OLD_POS; memmove((uchar *)info->lastkey + share->base.max_key_length * 2, (uchar *)info->lastkey, info->lastkey_length); info->save_update = info->update; info->save_lastinx = info->lastinx; info->save_lastpos = info->lastpos; info->save_lastkey_length = info->lastkey_length; if (function == HA_EXTRA_REMEMBER_POS) break; /* fall through */ case HA_EXTRA_KEYREAD_CHANGE_POS: info->opt_flag |= KEY_READ_USED; info->read_record = _mi_read_key_record; break; case HA_EXTRA_NO_KEYREAD: case HA_EXTRA_RESTORE_POS: if (info->opt_flag & REMEMBER_OLD_POS) { memmove((uchar *)info->lastkey, (uchar *)info->lastkey + share->base.max_key_length * 2, info->save_lastkey_length); info->update = info->save_update | HA_STATE_WRITTEN; info->lastinx = info->save_lastinx; info->lastpos = info->save_lastpos; info->lastkey_length = info->save_lastkey_length; } info->read_record = share->read_record; info->opt_flag &= ~(KEY_READ_USED | REMEMBER_OLD_POS); break; case HA_EXTRA_NO_USER_CHANGE: /* Database is somehow locked agains changes */ info->lock_type = F_EXTRA_LCK; /* Simulate as locked */ break; case HA_EXTRA_WAIT_LOCK: info->lock_wait = 0; break; case HA_EXTRA_NO_WAIT_LOCK: info->lock_wait = MY_DONT_WAIT; break; case HA_EXTRA_NO_KEYS: if (info->lock_type == F_UNLCK) { error = 1; /* Not possibly if not lock */ break; } if (mi_is_any_key_active(share->state.key_map)) { MI_KEYDEF *key = share->keyinfo; uint i; for (i = 0; i < share->base.keys; i++, key++) { if (!(key->flag & HA_NOSAME) && info->s->base.auto_key != i + 1) { mi_clear_key_active(share->state.key_map, i); info->update |= HA_STATE_CHANGED; } } if (!share->changed) { share->state.changed |= STATE_CHANGED | STATE_NOT_ANALYZED; share->changed = 1; /* Update on close */ if (!share->global_changed) { share->global_changed = 1; share->state.open_count++; } } share->state.state = *info->state; error = mi_state_info_write(share->kfile, &share->state, 1 | 2); } break; case HA_EXTRA_FORCE_REOPEN: mysql_mutex_lock(&THR_LOCK_myisam); share->last_version = 0L; /* Impossible version */ mysql_mutex_unlock(&THR_LOCK_myisam); break; case HA_EXTRA_PREPARE_FOR_DROP: mysql_mutex_lock(&THR_LOCK_myisam); share->last_version = 0L; /* Impossible version */ mysql_mutex_unlock(&THR_LOCK_myisam); break; case HA_EXTRA_FLUSH: if (!share->temporary) flush_key_blocks(share->key_cache, keycache_thread_var(), share->kfile, FLUSH_KEEP); #ifndef _WIN32 _mi_decrement_open_count(info); #endif if (share->not_flushed) { share->not_flushed = 0; if (mysql_file_sync(share->kfile, MYF(0))) error = my_errno(); if (mysql_file_sync(info->dfile, MYF(0))) error = my_errno(); if (error) { share->changed = 1; mi_print_error(info->s, HA_ERR_CRASHED); mi_mark_crashed(info); /* Fatal error found */ } } if (share->base.blobs) mi_alloc_rec_buff(info, -1, &info->rec_buff); break; case HA_EXTRA_NORMAL: /* Theese isn't in use */ info->quick_mode = 0; break; case HA_EXTRA_QUICK: info->quick_mode = 1; break; case HA_EXTRA_NO_ROWS: if (!share->state.header.uniques) info->opt_flag |= OPT_NO_ROWS; break; case HA_EXTRA_PRELOAD_BUFFER_SIZE: info->preload_buff_size = *((ulong *)extra_arg); break; case HA_EXTRA_CHANGE_KEY_TO_UNIQUE: case HA_EXTRA_CHANGE_KEY_TO_DUP: mi_extra_keyflag(info, function); break; case HA_EXTRA_MARK_AS_LOG_TABLE: mysql_mutex_lock(&share->intern_lock); share->is_log_table = true; mysql_mutex_unlock(&share->intern_lock); break; default: break; } { char tmp[1]; tmp[0] = function; myisam_log_command(MI_LOG_EXTRA, info, (uchar *)tmp, 1, error); } return error; } /* mi_extra */ void mi_set_index_cond_func(MI_INFO *info, index_cond_func_t func, void *func_arg) { info->index_cond_func = func; info->index_cond_func_arg = func_arg; } /* Start/Stop Inserting Duplicates Into a Table, WL#1648. */ static void mi_extra_keyflag(MI_INFO *info, enum ha_extra_function function) { uint idx; for (idx = 0; idx < info->s->base.keys; idx++) { switch (function) { case HA_EXTRA_CHANGE_KEY_TO_UNIQUE: info->s->keyinfo[idx].flag |= HA_NOSAME; break; case HA_EXTRA_CHANGE_KEY_TO_DUP: info->s->keyinfo[idx].flag &= ~(HA_NOSAME); break; default: break; } } } int mi_reset(MI_INFO *info) { int error = 0; MYISAM_SHARE *share = info->s; DBUG_TRACE; /* Free buffers and reset the following flags: EXTRA_CACHE, EXTRA_WRITE_CACHE, EXTRA_KEYREAD, EXTRA_QUICK If the row buffer cache is large (for dynamic tables), reduce it to save memory. */ if (info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED)) { info->opt_flag &= ~(READ_CACHE_USED | WRITE_CACHE_USED); error = end_io_cache(&info->rec_cache); } if (share->base.blobs) mi_alloc_rec_buff(info, -1, &info->rec_buff); #if defined(HAVE_MADVISE) if (info->opt_flag & MEMMAP_USED) madvise((char *)share->file_map, share->state.state.data_file_length, MADV_RANDOM); #endif info->opt_flag &= ~(KEY_READ_USED | REMEMBER_OLD_POS); info->quick_mode = 0; info->lastinx = 0; /* Use first index as def */ info->last_search_keypage = info->lastpos = HA_OFFSET_ERROR; info->page_changed = 1; info->update = ((info->update & HA_STATE_CHANGED) | HA_STATE_NEXT_FOUND | HA_STATE_PREV_FOUND); return error; }