166325755SMatthew Dillon /* 2b84de5afSMatthew Dillon * Copyright (c) 2007-2008 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*5de0c0e5SMatthew Dillon * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.20 2008/06/23 21:42:48 dillon Exp $ 3566325755SMatthew Dillon */ 3666325755SMatthew Dillon 3766325755SMatthew Dillon #include "hammer.h" 3866325755SMatthew Dillon 39*5de0c0e5SMatthew Dillon static hammer_tid_t hammer_alloc_tid(hammer_mount_t hmp, int count); 400729c8c8SMatthew Dillon 410729c8c8SMatthew Dillon 42b84de5afSMatthew Dillon /* 43b84de5afSMatthew Dillon * Start a standard transaction. 44b84de5afSMatthew Dillon */ 4566325755SMatthew Dillon void 468cd0a023SMatthew Dillon hammer_start_transaction(struct hammer_transaction *trans, 478cd0a023SMatthew Dillon struct hammer_mount *hmp) 4866325755SMatthew Dillon { 49ddfdf542SMatthew Dillon struct timeval tv; 50a89aec1bSMatthew Dillon int error; 5166325755SMatthew Dillon 52b84de5afSMatthew Dillon trans->type = HAMMER_TRANS_STD; 5366325755SMatthew Dillon trans->hmp = hmp; 54a89aec1bSMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 55a89aec1bSMatthew Dillon KKASSERT(error == 0); 56b84de5afSMatthew Dillon trans->tid = 0; 572f85fa4dSMatthew Dillon trans->sync_lock_refs = 0; 58ddfdf542SMatthew Dillon 59ddfdf542SMatthew Dillon getmicrotime(&tv); 60ddfdf542SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + 61ddfdf542SMatthew Dillon tv.tv_usec; 6266325755SMatthew Dillon } 6366325755SMatthew Dillon 64b84de5afSMatthew Dillon /* 65b84de5afSMatthew Dillon * Start a simple read-only transaction. This will not stall. 66b84de5afSMatthew Dillon */ 6766325755SMatthew Dillon void 6836f82b23SMatthew Dillon hammer_simple_transaction(struct hammer_transaction *trans, 6936f82b23SMatthew Dillon struct hammer_mount *hmp) 7036f82b23SMatthew Dillon { 71ddfdf542SMatthew Dillon struct timeval tv; 7236f82b23SMatthew Dillon int error; 7336f82b23SMatthew Dillon 74b84de5afSMatthew Dillon trans->type = HAMMER_TRANS_RO; 7536f82b23SMatthew Dillon trans->hmp = hmp; 7636f82b23SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 7736f82b23SMatthew Dillon KKASSERT(error == 0); 78b84de5afSMatthew Dillon trans->tid = 0; 792f85fa4dSMatthew Dillon trans->sync_lock_refs = 0; 80ddfdf542SMatthew Dillon 81ddfdf542SMatthew Dillon getmicrotime(&tv); 82ddfdf542SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + 83ddfdf542SMatthew Dillon tv.tv_usec; 8436f82b23SMatthew Dillon } 8536f82b23SMatthew Dillon 86b84de5afSMatthew Dillon /* 87b84de5afSMatthew Dillon * Start a transaction using a particular TID. Used by the sync code. 88b84de5afSMatthew Dillon * This does not stall. 892f85fa4dSMatthew Dillon * 902f85fa4dSMatthew Dillon * This routine may only be called from the flusher thread. We predispose 912f85fa4dSMatthew Dillon * sync_lock_refs, implying serialization against the synchronization stage 922f85fa4dSMatthew Dillon * (which the flusher is responsible for). 93b84de5afSMatthew Dillon */ 9436f82b23SMatthew Dillon void 95b84de5afSMatthew Dillon hammer_start_transaction_fls(struct hammer_transaction *trans, 96b84de5afSMatthew Dillon struct hammer_mount *hmp) 97d113fda1SMatthew Dillon { 98ddfdf542SMatthew Dillon struct timeval tv; 99d113fda1SMatthew Dillon int error; 100d113fda1SMatthew Dillon 1019f5097dcSMatthew Dillon bzero(trans, sizeof(*trans)); 1029f5097dcSMatthew Dillon 103b84de5afSMatthew Dillon trans->type = HAMMER_TRANS_FLS; 104d113fda1SMatthew Dillon trans->hmp = hmp; 105d113fda1SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 106d113fda1SMatthew Dillon KKASSERT(error == 0); 107*5de0c0e5SMatthew Dillon trans->tid = hammer_alloc_tid(hmp, 1); 1082f85fa4dSMatthew Dillon trans->sync_lock_refs = 1; 109ddfdf542SMatthew Dillon 110ddfdf542SMatthew Dillon getmicrotime(&tv); 111ddfdf542SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + 112ddfdf542SMatthew Dillon tv.tv_usec; 113d113fda1SMatthew Dillon } 114d113fda1SMatthew Dillon 115d113fda1SMatthew Dillon void 116b84de5afSMatthew Dillon hammer_done_transaction(struct hammer_transaction *trans) 11766325755SMatthew Dillon { 1182f85fa4dSMatthew Dillon int expected_lock_refs; 1192f85fa4dSMatthew Dillon 120a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 121b84de5afSMatthew Dillon trans->rootvol = NULL; 1222f85fa4dSMatthew Dillon expected_lock_refs = (trans->type == HAMMER_TRANS_FLS) ? 1 : 0; 1232f85fa4dSMatthew Dillon KKASSERT(trans->sync_lock_refs == expected_lock_refs); 1242f85fa4dSMatthew Dillon trans->sync_lock_refs = 0; 12566325755SMatthew Dillon } 12666325755SMatthew Dillon 127d113fda1SMatthew Dillon /* 128*5de0c0e5SMatthew Dillon * Allocate (count) TIDs. If running in multi-master mode the returned 129*5de0c0e5SMatthew Dillon * base will be aligned to a 16-count plus the master id (0-15). 130*5de0c0e5SMatthew Dillon * Multi-master mode allows non-conflicting to run and new objects to be 131*5de0c0e5SMatthew Dillon * created on multiple masters in parallel. The transaction id identifies 132*5de0c0e5SMatthew Dillon * the original master. The object_id is also subject to this rule in 133*5de0c0e5SMatthew Dillon * order to allow objects to be created on multiple masters in parallel. 134*5de0c0e5SMatthew Dillon * 135*5de0c0e5SMatthew Dillon * Directories may pre-allocate a large number of object ids (100,000). 136*5de0c0e5SMatthew Dillon * 137*5de0c0e5SMatthew Dillon * NOTE: There is no longer a requirement that successive transaction 138*5de0c0e5SMatthew Dillon * ids be 2 apart for separator generation. 139d113fda1SMatthew Dillon */ 1400729c8c8SMatthew Dillon static hammer_tid_t 141*5de0c0e5SMatthew Dillon hammer_alloc_tid(hammer_mount_t hmp, int count) 142a89aec1bSMatthew Dillon { 143a89aec1bSMatthew Dillon hammer_tid_t tid; 144*5de0c0e5SMatthew Dillon int multiplier = (hmp->masterid < 0) ? 1 : HAMMER_MAX_MASTERS; 145a89aec1bSMatthew Dillon 146*5de0c0e5SMatthew Dillon tid = (hmp->next_tid + multiplier) & ~(hammer_tid_t)(multiplier - 1); 1470729c8c8SMatthew Dillon if (tid >= 0xFFFFFFFFFFFFF000ULL) 148a89aec1bSMatthew Dillon panic("hammer_start_transaction: Ran out of TIDs!"); 149*5de0c0e5SMatthew Dillon hmp->next_tid = tid + count * multiplier; 150*5de0c0e5SMatthew Dillon if (hammer_debug_tid) 151*5de0c0e5SMatthew Dillon kprintf("alloc_tid %016llx\n", tid); 152a89aec1bSMatthew Dillon return(tid); 153a89aec1bSMatthew Dillon } 154a89aec1bSMatthew Dillon 1550729c8c8SMatthew Dillon /* 1560729c8c8SMatthew Dillon * Allocate an object id 1570729c8c8SMatthew Dillon */ 1580729c8c8SMatthew Dillon hammer_tid_t 159*5de0c0e5SMatthew Dillon hammer_alloc_objid(hammer_mount_t hmp, hammer_inode_t dip) 1600729c8c8SMatthew Dillon { 1610729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 1620729c8c8SMatthew Dillon hammer_tid_t tid; 1630729c8c8SMatthew Dillon 1640729c8c8SMatthew Dillon while ((ocp = dip->objid_cache) == NULL) { 165*5de0c0e5SMatthew Dillon if (hmp->objid_cache_count < OBJID_CACHE_SIZE) { 1660729c8c8SMatthew Dillon ocp = kmalloc(sizeof(*ocp), M_HAMMER, M_WAITOK|M_ZERO); 167*5de0c0e5SMatthew Dillon ocp->next_tid = hammer_alloc_tid(hmp, OBJID_CACHE_BULK); 1680729c8c8SMatthew Dillon ocp->count = OBJID_CACHE_BULK; 169*5de0c0e5SMatthew Dillon TAILQ_INSERT_HEAD(&hmp->objid_cache_list, ocp, entry); 170*5de0c0e5SMatthew Dillon ++hmp->objid_cache_count; 1710729c8c8SMatthew Dillon /* may have blocked, recheck */ 1720729c8c8SMatthew Dillon if (dip->objid_cache == NULL) { 1730729c8c8SMatthew Dillon dip->objid_cache = ocp; 1740729c8c8SMatthew Dillon ocp->dip = dip; 1750729c8c8SMatthew Dillon } 1760729c8c8SMatthew Dillon } else { 177*5de0c0e5SMatthew Dillon ocp = TAILQ_FIRST(&hmp->objid_cache_list); 1780729c8c8SMatthew Dillon if (ocp->dip) 1790729c8c8SMatthew Dillon ocp->dip->objid_cache = NULL; 1800729c8c8SMatthew Dillon dip->objid_cache = ocp; 1810729c8c8SMatthew Dillon ocp->dip = dip; 1820729c8c8SMatthew Dillon } 1830729c8c8SMatthew Dillon } 184*5de0c0e5SMatthew Dillon TAILQ_REMOVE(&hmp->objid_cache_list, ocp, entry); 185*5de0c0e5SMatthew Dillon 186*5de0c0e5SMatthew Dillon /* 187*5de0c0e5SMatthew Dillon * The TID is incremented by 1 or by 16 depending what mode the 188*5de0c0e5SMatthew Dillon * mount is operating in. 189*5de0c0e5SMatthew Dillon */ 1900729c8c8SMatthew Dillon tid = ocp->next_tid; 191*5de0c0e5SMatthew Dillon ocp->next_tid += (hmp->masterid < 0) ? 1 : HAMMER_MAX_MASTERS; 192*5de0c0e5SMatthew Dillon 1930729c8c8SMatthew Dillon if (--ocp->count == 0) { 1940729c8c8SMatthew Dillon dip->objid_cache = NULL; 195*5de0c0e5SMatthew Dillon --hmp->objid_cache_count; 1960729c8c8SMatthew Dillon ocp->dip = NULL; 1970729c8c8SMatthew Dillon kfree(ocp, M_HAMMER); 1980729c8c8SMatthew Dillon } else { 199*5de0c0e5SMatthew Dillon TAILQ_INSERT_TAIL(&hmp->objid_cache_list, ocp, entry); 2000729c8c8SMatthew Dillon } 2010729c8c8SMatthew Dillon return(tid); 2020729c8c8SMatthew Dillon } 2030729c8c8SMatthew Dillon 2040729c8c8SMatthew Dillon void 2050729c8c8SMatthew Dillon hammer_clear_objid(hammer_inode_t dip) 2060729c8c8SMatthew Dillon { 2070729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 2080729c8c8SMatthew Dillon 2090729c8c8SMatthew Dillon if ((ocp = dip->objid_cache) != NULL) { 2100729c8c8SMatthew Dillon dip->objid_cache = NULL; 2110729c8c8SMatthew Dillon ocp->dip = NULL; 2120729c8c8SMatthew Dillon TAILQ_REMOVE(&dip->hmp->objid_cache_list, ocp, entry); 2130729c8c8SMatthew Dillon TAILQ_INSERT_HEAD(&dip->hmp->objid_cache_list, ocp, entry); 2140729c8c8SMatthew Dillon } 2150729c8c8SMatthew Dillon } 2160729c8c8SMatthew Dillon 2170729c8c8SMatthew Dillon void 2180729c8c8SMatthew Dillon hammer_destroy_objid_cache(hammer_mount_t hmp) 2190729c8c8SMatthew Dillon { 2200729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 2210729c8c8SMatthew Dillon 2220729c8c8SMatthew Dillon while ((ocp = TAILQ_FIRST(&hmp->objid_cache_list)) != NULL) { 2230729c8c8SMatthew Dillon TAILQ_REMOVE(&hmp->objid_cache_list, ocp, entry); 2240729c8c8SMatthew Dillon kfree(ocp, M_HAMMER); 2250729c8c8SMatthew Dillon } 2260729c8c8SMatthew Dillon } 2270729c8c8SMatthew Dillon 228