1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_DMU_TX_H 27 #define _SYS_DMU_TX_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/inttypes.h> 32 #include <sys/dmu.h> 33 #include <sys/txg.h> 34 #include <sys/refcount.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 struct dmu_buf_impl; 41 struct dmu_tx_hold; 42 struct dnode_link; 43 struct dsl_pool; 44 struct dnode; 45 struct dsl_dir; 46 47 struct dmu_tx { 48 /* 49 * No synchronization is needed because a tx can only be handled 50 * by one thread. 51 */ 52 list_t tx_holds; /* list of dmu_tx_hold_t */ 53 objset_t *tx_objset; 54 struct dsl_dir *tx_dir; 55 struct dsl_pool *tx_pool; 56 uint64_t tx_txg; 57 uint64_t tx_lastsnap_txg; 58 uint64_t tx_lasttried_txg; 59 txg_handle_t tx_txgh; 60 void *tx_tempreserve_cookie; 61 struct dmu_tx_hold *tx_needassign_txh; 62 uint8_t tx_anyobj; 63 int tx_err; 64 #ifdef ZFS_DEBUG 65 uint64_t tx_space_towrite; 66 uint64_t tx_space_tofree; 67 uint64_t tx_space_tooverwrite; 68 uint64_t tx_space_tounref; 69 refcount_t tx_space_written; 70 refcount_t tx_space_freed; 71 #endif 72 }; 73 74 enum dmu_tx_hold_type { 75 THT_NEWOBJECT, 76 THT_WRITE, 77 THT_BONUS, 78 THT_FREE, 79 THT_ZAP, 80 THT_SPACE, 81 THT_NUMTYPES 82 }; 83 84 typedef struct dmu_tx_hold { 85 dmu_tx_t *txh_tx; 86 list_node_t txh_node; 87 struct dnode *txh_dnode; 88 uint64_t txh_space_towrite; 89 uint64_t txh_space_tofree; 90 uint64_t txh_space_tooverwrite; 91 uint64_t txh_space_tounref; 92 uint64_t txh_memory_tohold; 93 uint64_t txh_fudge; 94 #ifdef ZFS_DEBUG 95 enum dmu_tx_hold_type txh_type; 96 uint64_t txh_arg1; 97 uint64_t txh_arg2; 98 #endif 99 } dmu_tx_hold_t; 100 101 102 /* 103 * These routines are defined in dmu.h, and are called by the user. 104 */ 105 dmu_tx_t *dmu_tx_create(objset_t *dd); 106 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 107 void dmu_tx_commit(dmu_tx_t *tx); 108 void dmu_tx_abort(dmu_tx_t *tx); 109 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 110 void dmu_tx_wait(dmu_tx_t *tx); 111 112 /* 113 * These routines are defined in dmu_spa.h, and are called by the SPA. 114 */ 115 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 116 117 /* 118 * These routines are only called by the DMU. 119 */ 120 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); 121 int dmu_tx_is_syncing(dmu_tx_t *tx); 122 int dmu_tx_private_ok(dmu_tx_t *tx); 123 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object); 124 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta); 125 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 126 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object); 127 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 128 129 #ifdef ZFS_DEBUG 130 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 131 #else 132 #define DMU_TX_DIRTY_BUF(tx, db) 133 #endif 134 135 #ifdef __cplusplus 136 } 137 #endif 138 139 #endif /* _SYS_DMU_TX_H */ 140