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 2010 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_SPILL, 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 typedef struct dmu_tx_callback { 102 list_node_t dcb_node; /* linked to tx_callbacks list */ 103 dmu_tx_callback_func_t *dcb_func; /* caller function pointer */ 104 void *dcb_data; /* caller private data */ 105 } dmu_tx_callback_t; 106 107 /* 108 * These routines are defined in dmu.h, and are called by the user. 109 */ 110 dmu_tx_t *dmu_tx_create(objset_t *dd); 111 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 112 void dmu_tx_commit(dmu_tx_t *tx); 113 void dmu_tx_abort(dmu_tx_t *tx); 114 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 115 void dmu_tx_wait(dmu_tx_t *tx); 116 117 void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func, 118 void *dcb_data); 119 void dmu_tx_do_callbacks(list_t *cb_list, int error); 120 121 /* 122 * These routines are defined in dmu_spa.h, and are called by the SPA. 123 */ 124 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 125 126 /* 127 * These routines are only called by the DMU. 128 */ 129 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); 130 int dmu_tx_is_syncing(dmu_tx_t *tx); 131 int dmu_tx_private_ok(dmu_tx_t *tx); 132 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object); 133 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta); 134 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 135 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object); 136 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 137 138 #ifdef ZFS_DEBUG 139 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 140 #else 141 #define DMU_TX_DIRTY_BUF(tx, db) 142 #endif 143 144 #ifdef __cplusplus 145 } 146 #endif 147 148 #endif /* _SYS_DMU_TX_H */ 149