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 2006 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 refcount_t tx_space_written; 69 refcount_t tx_space_freed; 70 #endif 71 }; 72 73 enum dmu_tx_hold_type { 74 THT_NEWOBJECT, 75 THT_WRITE, 76 THT_BONUS, 77 THT_FREE, 78 THT_ZAP, 79 THT_SPACE, 80 THT_NUMTYPES 81 }; 82 83 typedef struct dmu_tx_hold { 84 dmu_tx_t *txh_tx; 85 list_node_t txh_node; 86 struct dnode *txh_dnode; 87 uint64_t txh_space_towrite; 88 uint64_t txh_space_tofree; 89 uint64_t txh_space_tooverwrite; 90 #ifdef ZFS_DEBUG 91 enum dmu_tx_hold_type txh_type; 92 uint64_t txh_arg1; 93 uint64_t txh_arg2; 94 #endif 95 } dmu_tx_hold_t; 96 97 98 /* 99 * These routines are defined in dmu.h, and are called by the user. 100 */ 101 dmu_tx_t *dmu_tx_create(objset_t *dd); 102 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 103 void dmu_tx_commit(dmu_tx_t *tx); 104 void dmu_tx_abort(dmu_tx_t *tx); 105 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 106 void dmu_tx_wait(dmu_tx_t *tx); 107 108 /* 109 * These routines are defined in dmu_spa.h, and are called by the SPA. 110 */ 111 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 112 113 /* 114 * These routines are only called by the DMU. 115 */ 116 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); 117 int dmu_tx_is_syncing(dmu_tx_t *tx); 118 int dmu_tx_private_ok(dmu_tx_t *tx); 119 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object); 120 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta); 121 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 122 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object); 123 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 124 125 #ifdef ZFS_DEBUG 126 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 127 #else 128 #define DMU_TX_DIRTY_BUF(tx, db) 129 #endif 130 131 #ifdef __cplusplus 132 } 133 #endif 134 135 #endif /* _SYS_DMU_TX_H */ 136