/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB 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 (at your option) any later version. 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "myisamdef.h" #ifdef HAVE_MMAP #include <sys/mman.h> #endif #ifdef __WIN__ #include <errno.h> #endif /* 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) Used when function is one of: HA_EXTRA_WRITE_CACHE HA_EXTRA_CACHE HA_EXTRA_BULK_INSERT_BEGIN If extra_arg is 0, then the default cache size is used. HA_EXTRA_BULK_INSERT_FLUSH extra_arg is a a pointer to which index to flush (uint*) RETURN VALUES 0 ok */ int mi_extra(MI_INFO *info, enum ha_extra_function function, void *extra_arg) { int error=0; ulong cache_size; MYISAM_SHARE *share=info->s; DBUG_ENTER("mi_extra"); DBUG_PRINT("enter",("function: %d",(int) function)); switch (function) { case HA_EXTRA_RESET: /* Free buffers and reset the following flags: EXTRA_CACHE, EXTRA_WRITE_CACHE, EXTRA_KEYREAD, EXTRA_QUICK */ 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 defined(HAVE_MMAP) && defined(HAVE_MADVICE) if (info->opt_flag & MEMMAP_USED) madvise(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; /* Fall through */ 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, (pbool) (info->lock_type != F_UNLCK), (pbool) test(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_CACHE: if (info->lock_type == F_UNLCK && (share->options & HA_OPTION_PACK_RECORD)) { error=1; /* Not possibly if not locked */ my_errno=EACCES; break; } #if defined(HAVE_MMAP) && defined(HAVE_MADVICE) if ((share->options & HA_OPTION_COMPRESS_RECORD)) { pthread_mutex_lock(&share->intern_lock); if (_mi_memmap_file(info)) { /* We don't nead MADV_SEQUENTIAL if small file */ madvise(share->file_map,share->state.state.data_file_length, share->state.state.data_file_length <= RECORD_CACHE_SIZE*16 ? MADV_RANDOM : MADV_SEQUENTIAL); pthread_mutex_unlock(&share->intern_lock); break; } pthread_mutex_unlock(&share->intern_lock); } #endif if (info->opt_flag & WRITE_CACHE_USED) { info->opt_flag&= ~WRITE_CACHE_USED; if ((error=end_io_cache(&info->rec_cache))) break; } if (!(info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED | MEMMAP_USED))) { cache_size= (extra_arg ? *(ulong*) extra_arg : my_default_record_cache_size); if (!(init_io_cache(&info->rec_cache,info->dfile, (uint) min(info->state->data_file_length+1, cache_size), READ_CACHE,0L,(pbool) (info->lock_type != F_UNLCK), MYF(share->write_flag & MY_WAIT_IF_FULL)))) { info->opt_flag|=READ_CACHE_USED; info->update&= ~HA_STATE_ROW_CHANGED; } if (share->concurrent_insert) info->rec_cache.end_of_file=info->state->data_file_length; } break; case HA_EXTRA_REINIT_CACHE: if (info->opt_flag & READ_CACHE_USED) { reinit_io_cache(&info->rec_cache,READ_CACHE,info->nextpos, (pbool) (info->lock_type != F_UNLCK), (pbool) test(info->update & HA_STATE_ROW_CHANGED)); info->update&= ~HA_STATE_ROW_CHANGED; if (share->concurrent_insert) info->rec_cache.end_of_file=info->state->data_file_length; } break; case HA_EXTRA_WRITE_CACHE: if (info->lock_type == F_UNLCK) { error=1; /* Not possibly if not locked */ break; } cache_size= (extra_arg ? *(ulong*) extra_arg : my_default_record_cache_size); if (!(info->opt_flag & (READ_CACHE_USED | WRITE_CACHE_USED | OPT_NO_ROWS)) && !share->state.header.uniques) if (!(init_io_cache(&info->rec_cache,info->dfile, cache_size, WRITE_CACHE,info->state->data_file_length, (pbool) (info->lock_type != F_UNLCK), MYF(share->write_flag & MY_WAIT_IF_FULL)))) { info->opt_flag|=WRITE_CACHE_USED; info->update&= ~(HA_STATE_ROW_CHANGED | HA_STATE_WRITE_AT_END | HA_STATE_EXTEND_BLOCK); } break; case HA_EXTRA_PREPARE_FOR_UPDATE: if (info->s->data_file_type != DYNAMIC_RECORD) break; /* Remove read/write cache if dynamic rows */ case HA_EXTRA_NO_CACHE: 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); /* Sergei will insert full text index caching here */ } #if defined(HAVE_MMAP) && defined(HAVE_MADVICE) if (info->opt_flag & MEMMAP_USED) madvise(share->file_map,share->state.state.data_file_length,MADV_RANDOM); #endif break; case HA_EXTRA_FLUSH_CACHE: if (info->opt_flag & WRITE_CACHE_USED) { if ((error=flush_io_cache(&info->rec_cache))) mi_mark_crashed(info); /* Fatal error found */ } break; 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; bmove((byte*) info->lastkey+share->base.max_key_length*2, (byte*) 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) { bmove((byte*) info->lastkey, (byte*) 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 (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) { share->state.key_map&= ~ ((ulonglong) 1 << 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: case HA_EXTRA_PREPARE_FOR_DELETE: pthread_mutex_lock(&THR_LOCK_myisam); share->last_version= 0L; /* Impossible version */ #ifdef __WIN__ /* Close the isam and data files as Win32 can't drop an open table */ pthread_mutex_lock(&share->intern_lock); if (flush_key_blocks(share->kfile, (function == HA_EXTRA_FORCE_REOPEN ? FLUSH_RELEASE : FLUSH_IGNORE_CHANGED))) { error=my_errno; share->changed=1; mi_mark_crashed(info); /* Fatal error found */ } 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 (info->lock_type != F_UNLCK && ! info->was_locked) { info->was_locked=info->lock_type; if (mi_lock_database(info,F_UNLCK)) error=my_errno; info->lock_type = F_UNLCK; } if (share->kfile >= 0) _mi_decrement_open_count(info); if (share->kfile >= 0 && my_close(share->kfile,MYF(0))) error=my_errno; { LIST *list_element ; for (list_element=myisam_open_list ; list_element ; list_element=list_element->next) { MI_INFO *tmpinfo=(MI_INFO*) list_element->data; if (tmpinfo->s == info->s) { if (tmpinfo->dfile >= 0 && my_close(tmpinfo->dfile,MYF(0))) error = my_errno; tmpinfo->dfile= -1; } } } share->kfile= -1; /* Files aren't open anymore */ pthread_mutex_unlock(&share->intern_lock); #endif pthread_mutex_unlock(&THR_LOCK_myisam); break; case HA_EXTRA_FLUSH: if (!share->temporary) flush_key_blocks(share->kfile,FLUSH_KEEP); #ifdef HAVE_PWRITE _mi_decrement_open_count(info); #endif if (share->not_flushed) { share->not_flushed=0; #if defined(__WIN__) if (_commit(share->kfile)) error=errno; if (_commit(info->dfile)) error=errno; #elif defined(HAVE_FDATASYNC) if (fdatasync(share->kfile)) error=errno; if (fdatasync(share->dfile)) error=errno; #elif defined(HAVE_FSYNC) if ( fsync(share->kfile)) error=errno; if (fsync(share->dfile)) error=errno; #endif if (error) { share->changed=1; 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_KEY_CACHE: case HA_EXTRA_NO_KEY_CACHE: default: break; } { char tmp[1]; tmp[0]=function; myisam_log_command(MI_LOG_EXTRA,info,(byte*) tmp,1,error); } DBUG_RETURN(error); } /* mi_extra */