166325755SMatthew Dillon /* 266325755SMatthew Dillon * Copyright (c) 2007 The DragonFly Project. All rights reserved. 366325755SMatthew Dillon * 466325755SMatthew Dillon * This code is derived from software contributed to The DragonFly Project 566325755SMatthew Dillon * by Matthew Dillon <dillon@backplane.com> 666325755SMatthew Dillon * 766325755SMatthew Dillon * Redistribution and use in source and binary forms, with or without 866325755SMatthew Dillon * modification, are permitted provided that the following conditions 966325755SMatthew Dillon * are met: 1066325755SMatthew Dillon * 1166325755SMatthew Dillon * 1. Redistributions of source code must retain the above copyright 1266325755SMatthew Dillon * notice, this list of conditions and the following disclaimer. 1366325755SMatthew Dillon * 2. Redistributions in binary form must reproduce the above copyright 1466325755SMatthew Dillon * notice, this list of conditions and the following disclaimer in 1566325755SMatthew Dillon * the documentation and/or other materials provided with the 1666325755SMatthew Dillon * distribution. 1766325755SMatthew Dillon * 3. Neither the name of The DragonFly Project nor the names of its 1866325755SMatthew Dillon * contributors may be used to endorse or promote products derived 1966325755SMatthew Dillon * from this software without specific, prior written permission. 2066325755SMatthew Dillon * 2166325755SMatthew Dillon * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2266325755SMatthew Dillon * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2366325755SMatthew Dillon * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 2466325755SMatthew Dillon * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 2566325755SMatthew Dillon * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 2666325755SMatthew Dillon * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 2766325755SMatthew Dillon * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 2866325755SMatthew Dillon * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 2966325755SMatthew Dillon * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 3066325755SMatthew Dillon * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 3166325755SMatthew Dillon * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3266325755SMatthew Dillon * SUCH DAMAGE. 3366325755SMatthew Dillon * 34*36f82b23SMatthew Dillon * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.10 2008/03/19 20:18:17 dillon Exp $ 3566325755SMatthew Dillon */ 3666325755SMatthew Dillon 3766325755SMatthew Dillon #include "hammer.h" 3866325755SMatthew Dillon 3966325755SMatthew Dillon void 408cd0a023SMatthew Dillon hammer_start_transaction(struct hammer_transaction *trans, 418cd0a023SMatthew Dillon struct hammer_mount *hmp) 4266325755SMatthew Dillon { 43a89aec1bSMatthew Dillon int error; 4466325755SMatthew Dillon 4566325755SMatthew Dillon trans->hmp = hmp; 46a89aec1bSMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 47a89aec1bSMatthew Dillon KKASSERT(error == 0); 48a89aec1bSMatthew Dillon trans->tid = hammer_alloc_tid(trans); 4966325755SMatthew Dillon } 5066325755SMatthew Dillon 5166325755SMatthew Dillon void 52*36f82b23SMatthew Dillon hammer_simple_transaction(struct hammer_transaction *trans, 53*36f82b23SMatthew Dillon struct hammer_mount *hmp) 54*36f82b23SMatthew Dillon { 55*36f82b23SMatthew Dillon int error; 56*36f82b23SMatthew Dillon 57*36f82b23SMatthew Dillon trans->hmp = hmp; 58*36f82b23SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 59*36f82b23SMatthew Dillon trans->tid = 0; 60*36f82b23SMatthew Dillon KKASSERT(error == 0); 61*36f82b23SMatthew Dillon } 62*36f82b23SMatthew Dillon 63*36f82b23SMatthew Dillon void 64d113fda1SMatthew Dillon hammer_start_transaction_tid(struct hammer_transaction *trans, 65d113fda1SMatthew Dillon struct hammer_mount *hmp, hammer_tid_t tid) 66d113fda1SMatthew Dillon { 67d113fda1SMatthew Dillon int error; 68d113fda1SMatthew Dillon 69d113fda1SMatthew Dillon trans->hmp = hmp; 70d113fda1SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 71d113fda1SMatthew Dillon KKASSERT(error == 0); 72d113fda1SMatthew Dillon trans->tid = tid; 73d113fda1SMatthew Dillon } 74d113fda1SMatthew Dillon 75d113fda1SMatthew Dillon void 7666325755SMatthew Dillon hammer_abort_transaction(struct hammer_transaction *trans) 7766325755SMatthew Dillon { 78a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 7966325755SMatthew Dillon } 8066325755SMatthew Dillon 8166325755SMatthew Dillon void 8266325755SMatthew Dillon hammer_commit_transaction(struct hammer_transaction *trans) 8366325755SMatthew Dillon { 84a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 8566325755SMatthew Dillon } 8666325755SMatthew Dillon 87d113fda1SMatthew Dillon /* 88d113fda1SMatthew Dillon * Note: Successive transaction ids must be at least 2 apart so the 89d113fda1SMatthew Dillon * B-Tree code can make a separator that does not match either the 90d113fda1SMatthew Dillon * left or right hand sides. 91d113fda1SMatthew Dillon */ 92a89aec1bSMatthew Dillon hammer_tid_t 93a89aec1bSMatthew Dillon hammer_alloc_tid(hammer_transaction_t trans) 94a89aec1bSMatthew Dillon { 95a89aec1bSMatthew Dillon hammer_volume_ondisk_t ondisk; 96a89aec1bSMatthew Dillon struct timespec ts; 97a89aec1bSMatthew Dillon hammer_tid_t tid; 98a89aec1bSMatthew Dillon 99a89aec1bSMatthew Dillon getnanotime(&ts); 100a89aec1bSMatthew Dillon tid = ts.tv_sec * 1000000000LL + ts.tv_nsec; 101*36f82b23SMatthew Dillon hammer_modify_volume(trans, trans->rootvol, NULL, 0); 102a89aec1bSMatthew Dillon ondisk = trans->rootvol->ondisk; 10347197d71SMatthew Dillon if (tid < ondisk->vol0_next_tid) 10447197d71SMatthew Dillon tid = ondisk->vol0_next_tid; 105a89aec1bSMatthew Dillon if (tid == 0xFFFFFFFFFFFFFFFFULL) 106a89aec1bSMatthew Dillon panic("hammer_start_transaction: Ran out of TIDs!"); 107d113fda1SMatthew Dillon if (hammer_debug_tid) { 108d113fda1SMatthew Dillon kprintf("alloc_tid %016llx (0x%08x)\n", 109d113fda1SMatthew Dillon tid, (int)(tid / 1000000000LL)); 110d113fda1SMatthew Dillon } 11147197d71SMatthew Dillon ondisk->vol0_next_tid = tid + 2; 112a89aec1bSMatthew Dillon 113a89aec1bSMatthew Dillon return(tid); 114a89aec1bSMatthew Dillon } 115a89aec1bSMatthew Dillon 116