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 * 3421fde338SMatthew Dillon * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.25 2008/09/23 21:03:52 dillon Exp $ 3566325755SMatthew Dillon */ 3666325755SMatthew Dillon 3766325755SMatthew Dillon #include "hammer.h" 3866325755SMatthew Dillon 395de0c0e5SMatthew 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; 5821fde338SMatthew Dillon trans->flags = 0; 59ddfdf542SMatthew Dillon 60ddfdf542SMatthew Dillon getmicrotime(&tv); 61dd94f1b1SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + tv.tv_usec; 62dd94f1b1SMatthew Dillon trans->time32 = (u_int32_t)tv.tv_sec; 6366325755SMatthew Dillon } 6466325755SMatthew Dillon 65b84de5afSMatthew Dillon /* 66b84de5afSMatthew Dillon * Start a simple read-only transaction. This will not stall. 67b84de5afSMatthew Dillon */ 6866325755SMatthew Dillon void 6936f82b23SMatthew Dillon hammer_simple_transaction(struct hammer_transaction *trans, 7036f82b23SMatthew Dillon struct hammer_mount *hmp) 7136f82b23SMatthew Dillon { 72ddfdf542SMatthew Dillon struct timeval tv; 7336f82b23SMatthew Dillon int error; 7436f82b23SMatthew Dillon 75b84de5afSMatthew Dillon trans->type = HAMMER_TRANS_RO; 7636f82b23SMatthew Dillon trans->hmp = hmp; 7736f82b23SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 7836f82b23SMatthew Dillon KKASSERT(error == 0); 79b84de5afSMatthew Dillon trans->tid = 0; 802f85fa4dSMatthew Dillon trans->sync_lock_refs = 0; 8121fde338SMatthew Dillon trans->flags = 0; 82ddfdf542SMatthew Dillon 83ddfdf542SMatthew Dillon getmicrotime(&tv); 84dd94f1b1SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + tv.tv_usec; 85dd94f1b1SMatthew Dillon trans->time32 = (u_int32_t)tv.tv_sec; 8636f82b23SMatthew Dillon } 8736f82b23SMatthew Dillon 88b84de5afSMatthew Dillon /* 89b84de5afSMatthew Dillon * Start a transaction using a particular TID. Used by the sync code. 90b84de5afSMatthew Dillon * This does not stall. 912f85fa4dSMatthew Dillon * 922f85fa4dSMatthew Dillon * This routine may only be called from the flusher thread. We predispose 932f85fa4dSMatthew Dillon * sync_lock_refs, implying serialization against the synchronization stage 942f85fa4dSMatthew Dillon * (which the flusher is responsible for). 95b84de5afSMatthew Dillon */ 9636f82b23SMatthew Dillon void 97b84de5afSMatthew Dillon hammer_start_transaction_fls(struct hammer_transaction *trans, 98b84de5afSMatthew Dillon struct hammer_mount *hmp) 99d113fda1SMatthew Dillon { 100ddfdf542SMatthew Dillon struct timeval tv; 101d113fda1SMatthew Dillon int error; 102d113fda1SMatthew Dillon 1039f5097dcSMatthew Dillon bzero(trans, sizeof(*trans)); 1049f5097dcSMatthew Dillon 105b84de5afSMatthew Dillon trans->type = HAMMER_TRANS_FLS; 106d113fda1SMatthew Dillon trans->hmp = hmp; 107d113fda1SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 108d113fda1SMatthew Dillon KKASSERT(error == 0); 1095de0c0e5SMatthew Dillon trans->tid = hammer_alloc_tid(hmp, 1); 1102f85fa4dSMatthew Dillon trans->sync_lock_refs = 1; 11121fde338SMatthew Dillon trans->flags = 0; 112ddfdf542SMatthew Dillon 113ddfdf542SMatthew Dillon getmicrotime(&tv); 114dd94f1b1SMatthew Dillon trans->time = (unsigned long)tv.tv_sec * 1000000ULL + tv.tv_usec; 115dd94f1b1SMatthew Dillon trans->time32 = (u_int32_t)tv.tv_sec; 116d113fda1SMatthew Dillon } 117d113fda1SMatthew Dillon 118d113fda1SMatthew Dillon void 119b84de5afSMatthew Dillon hammer_done_transaction(struct hammer_transaction *trans) 12066325755SMatthew Dillon { 1212f85fa4dSMatthew Dillon int expected_lock_refs; 1222f85fa4dSMatthew Dillon 123a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 124b84de5afSMatthew Dillon trans->rootvol = NULL; 1252f85fa4dSMatthew Dillon expected_lock_refs = (trans->type == HAMMER_TRANS_FLS) ? 1 : 0; 1262f85fa4dSMatthew Dillon KKASSERT(trans->sync_lock_refs == expected_lock_refs); 1272f85fa4dSMatthew Dillon trans->sync_lock_refs = 0; 12821fde338SMatthew Dillon if (trans->flags & HAMMER_TRANSF_NEWINODE) 12921fde338SMatthew Dillon hammer_inode_waitreclaims(trans->hmp); 13066325755SMatthew Dillon } 13166325755SMatthew Dillon 132d113fda1SMatthew Dillon /* 1335de0c0e5SMatthew Dillon * Allocate (count) TIDs. If running in multi-master mode the returned 1345de0c0e5SMatthew Dillon * base will be aligned to a 16-count plus the master id (0-15). 1355de0c0e5SMatthew Dillon * Multi-master mode allows non-conflicting to run and new objects to be 1365de0c0e5SMatthew Dillon * created on multiple masters in parallel. The transaction id identifies 1375de0c0e5SMatthew Dillon * the original master. The object_id is also subject to this rule in 1385de0c0e5SMatthew Dillon * order to allow objects to be created on multiple masters in parallel. 1395de0c0e5SMatthew Dillon * 1405de0c0e5SMatthew Dillon * Directories may pre-allocate a large number of object ids (100,000). 1415de0c0e5SMatthew Dillon * 1425de0c0e5SMatthew Dillon * NOTE: There is no longer a requirement that successive transaction 1435de0c0e5SMatthew Dillon * ids be 2 apart for separator generation. 144d113fda1SMatthew Dillon */ 1450729c8c8SMatthew Dillon static hammer_tid_t 1465de0c0e5SMatthew Dillon hammer_alloc_tid(hammer_mount_t hmp, int count) 147a89aec1bSMatthew Dillon { 148a89aec1bSMatthew Dillon hammer_tid_t tid; 149a89aec1bSMatthew Dillon 150732a1697SMatthew Dillon if (hmp->master_id < 0) { 151c82af904SMatthew Dillon tid = hmp->next_tid + 1; 152c82af904SMatthew Dillon hmp->next_tid = tid + count; 153c82af904SMatthew Dillon } else { 154c82af904SMatthew Dillon tid = (hmp->next_tid + HAMMER_MAX_MASTERS) & 155c82af904SMatthew Dillon ~(hammer_tid_t)(HAMMER_MAX_MASTERS - 1); 156c82af904SMatthew Dillon hmp->next_tid = tid + count * HAMMER_MAX_MASTERS; 157732a1697SMatthew Dillon tid |= hmp->master_id; 158c82af904SMatthew Dillon } 159c82af904SMatthew Dillon if (tid >= 0xFFFFFFFFFF000000ULL) 160a89aec1bSMatthew Dillon panic("hammer_start_transaction: Ran out of TIDs!"); 1615de0c0e5SMatthew Dillon if (hammer_debug_tid) 1625de0c0e5SMatthew Dillon kprintf("alloc_tid %016llx\n", tid); 163a89aec1bSMatthew Dillon return(tid); 164a89aec1bSMatthew Dillon } 165a89aec1bSMatthew Dillon 1660729c8c8SMatthew Dillon /* 1670729c8c8SMatthew Dillon * Allocate an object id 1680729c8c8SMatthew Dillon */ 1690729c8c8SMatthew Dillon hammer_tid_t 1705de0c0e5SMatthew Dillon hammer_alloc_objid(hammer_mount_t hmp, hammer_inode_t dip) 1710729c8c8SMatthew Dillon { 1720729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 1730729c8c8SMatthew Dillon hammer_tid_t tid; 1740729c8c8SMatthew Dillon 1750729c8c8SMatthew Dillon while ((ocp = dip->objid_cache) == NULL) { 1765de0c0e5SMatthew Dillon if (hmp->objid_cache_count < OBJID_CACHE_SIZE) { 177*bac808feSMatthew Dillon ocp = kmalloc(sizeof(*ocp), hmp->m_misc, 178*bac808feSMatthew Dillon M_WAITOK|M_ZERO); 1795de0c0e5SMatthew Dillon ocp->next_tid = hammer_alloc_tid(hmp, OBJID_CACHE_BULK); 1800729c8c8SMatthew Dillon ocp->count = OBJID_CACHE_BULK; 1815de0c0e5SMatthew Dillon TAILQ_INSERT_HEAD(&hmp->objid_cache_list, ocp, entry); 1825de0c0e5SMatthew Dillon ++hmp->objid_cache_count; 1830729c8c8SMatthew Dillon /* may have blocked, recheck */ 1840729c8c8SMatthew Dillon if (dip->objid_cache == NULL) { 1850729c8c8SMatthew Dillon dip->objid_cache = ocp; 1860729c8c8SMatthew Dillon ocp->dip = dip; 1870729c8c8SMatthew Dillon } 1880729c8c8SMatthew Dillon } else { 1895de0c0e5SMatthew Dillon ocp = TAILQ_FIRST(&hmp->objid_cache_list); 1900729c8c8SMatthew Dillon if (ocp->dip) 1910729c8c8SMatthew Dillon ocp->dip->objid_cache = NULL; 1920729c8c8SMatthew Dillon dip->objid_cache = ocp; 1930729c8c8SMatthew Dillon ocp->dip = dip; 1940729c8c8SMatthew Dillon } 1950729c8c8SMatthew Dillon } 1965de0c0e5SMatthew Dillon TAILQ_REMOVE(&hmp->objid_cache_list, ocp, entry); 1975de0c0e5SMatthew Dillon 1985de0c0e5SMatthew Dillon /* 1995de0c0e5SMatthew Dillon * The TID is incremented by 1 or by 16 depending what mode the 2005de0c0e5SMatthew Dillon * mount is operating in. 2015de0c0e5SMatthew Dillon */ 2020729c8c8SMatthew Dillon tid = ocp->next_tid; 203732a1697SMatthew Dillon ocp->next_tid += (hmp->master_id < 0) ? 1 : HAMMER_MAX_MASTERS; 2045de0c0e5SMatthew Dillon 2050729c8c8SMatthew Dillon if (--ocp->count == 0) { 2060729c8c8SMatthew Dillon dip->objid_cache = NULL; 2075de0c0e5SMatthew Dillon --hmp->objid_cache_count; 2080729c8c8SMatthew Dillon ocp->dip = NULL; 209*bac808feSMatthew Dillon kfree(ocp, hmp->m_misc); 2100729c8c8SMatthew Dillon } else { 2115de0c0e5SMatthew Dillon TAILQ_INSERT_TAIL(&hmp->objid_cache_list, ocp, entry); 2120729c8c8SMatthew Dillon } 2130729c8c8SMatthew Dillon return(tid); 2140729c8c8SMatthew Dillon } 2150729c8c8SMatthew Dillon 2160729c8c8SMatthew Dillon void 2170729c8c8SMatthew Dillon hammer_clear_objid(hammer_inode_t dip) 2180729c8c8SMatthew Dillon { 2190729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 2200729c8c8SMatthew Dillon 2210729c8c8SMatthew Dillon if ((ocp = dip->objid_cache) != NULL) { 2220729c8c8SMatthew Dillon dip->objid_cache = NULL; 2230729c8c8SMatthew Dillon ocp->dip = NULL; 2240729c8c8SMatthew Dillon TAILQ_REMOVE(&dip->hmp->objid_cache_list, ocp, entry); 2250729c8c8SMatthew Dillon TAILQ_INSERT_HEAD(&dip->hmp->objid_cache_list, ocp, entry); 2260729c8c8SMatthew Dillon } 2270729c8c8SMatthew Dillon } 2280729c8c8SMatthew Dillon 2290729c8c8SMatthew Dillon void 2300729c8c8SMatthew Dillon hammer_destroy_objid_cache(hammer_mount_t hmp) 2310729c8c8SMatthew Dillon { 2320729c8c8SMatthew Dillon hammer_objid_cache_t ocp; 2330729c8c8SMatthew Dillon 2340729c8c8SMatthew Dillon while ((ocp = TAILQ_FIRST(&hmp->objid_cache_list)) != NULL) { 2350729c8c8SMatthew Dillon TAILQ_REMOVE(&hmp->objid_cache_list, ocp, entry); 236f437a2abSMatthew Dillon if (ocp->dip) 237f437a2abSMatthew Dillon ocp->dip->objid_cache = NULL; 238*bac808feSMatthew Dillon kfree(ocp, hmp->m_misc); 2390729c8c8SMatthew Dillon } 2400729c8c8SMatthew Dillon } 2410729c8c8SMatthew Dillon 242