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 2009 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 #include <sys/inttypes.h> 30 #include <sys/dmu.h> 31 #include <sys/txg.h> 32 #include <sys/refcount.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 struct dmu_buf_impl; 39 struct dmu_tx_hold; 40 struct dnode_link; 41 struct dsl_pool; 42 struct dnode; 43 struct dsl_dir; 44 45 struct dmu_tx { 46 /* 47 * No synchronization is needed because a tx can only be handled 48 * by one thread. 49 */ 50 list_t tx_holds; /* list of dmu_tx_hold_t */ 51 objset_t *tx_objset; 52 struct dsl_dir *tx_dir; 53 struct dsl_pool *tx_pool; 54 uint64_t tx_txg; 55 uint64_t tx_lastsnap_txg; 56 uint64_t tx_lasttried_txg; 57 txg_handle_t tx_txgh; 58 void *tx_tempreserve_cookie; 59 struct dmu_tx_hold *tx_needassign_txh; 60 list_t tx_callbacks; /* list of dmu_tx_callback_t on this dmu_tx */ 61 uint8_t tx_anyobj; 62 int tx_err; 63 #ifdef ZFS_DEBUG 64 uint64_t tx_space_towrite; 65 uint64_t tx_space_tofree; 66 uint64_t tx_space_tooverwrite; 67 uint64_t tx_space_tounref; 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 uint64_t txh_space_tounref; 91 uint64_t txh_memory_tohold; 92 uint64_t txh_fudge; 93 #ifdef ZFS_DEBUG 94 enum dmu_tx_hold_type txh_type; 95 uint64_t txh_arg1; 96 uint64_t txh_arg2; 97 #endif 98 } dmu_tx_hold_t; 99 100 typedef struct dmu_tx_callback { 101 list_node_t dcb_node; /* linked to tx_callbacks list */ 102 dmu_tx_callback_func_t *dcb_func; /* caller function pointer */ 103 void *dcb_data; /* caller private data */ 104 } dmu_tx_callback_t; 105 106 /* 107 * These routines are defined in dmu.h, and are called by the user. 108 */ 109 dmu_tx_t *dmu_tx_create(objset_t *dd); 110 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 111 void dmu_tx_commit(dmu_tx_t *tx); 112 void dmu_tx_abort(dmu_tx_t *tx); 113 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 114 void dmu_tx_wait(dmu_tx_t *tx); 115 116 void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func, 117 void *dcb_data); 118 void dmu_tx_do_callbacks(list_t *cb_list, int error); 119 120 /* 121 * These routines are defined in dmu_spa.h, and are called by the SPA. 122 */ 123 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 124 125 /* 126 * These routines are only called by the DMU. 127 */ 128 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); 129 int dmu_tx_is_syncing(dmu_tx_t *tx); 130 int dmu_tx_private_ok(dmu_tx_t *tx); 131 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object); 132 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta); 133 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 134 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object); 135 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 136 137 #ifdef ZFS_DEBUG 138 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 139 #else 140 #define DMU_TX_DIRTY_BUF(tx, db) 141 #endif 142 143 #ifdef __cplusplus 144 } 145 #endif 146 147 #endif /* _SYS_DMU_TX_H */ 148