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 * Copyright (c) 2012, 2016 by Delphix. All rights reserved. 27 */ 28 29 #ifndef _SYS_DMU_TX_H 30 #define _SYS_DMU_TX_H 31 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 63 /* list of dmu_tx_callback_t on this dmu_tx */ 64 list_t tx_callbacks; 65 66 /* placeholder for syncing context, doesn't need specific holds */ 67 boolean_t tx_anyobj; 68 69 /* transaction is marked as being a "net free" of space */ 70 boolean_t tx_netfree; 71 72 /* time this transaction was created */ 73 hrtime_t tx_start; 74 75 /* need to wait for sufficient dirty space */ 76 boolean_t tx_wait_dirty; 77 78 /* has this transaction already been delayed? */ 79 boolean_t tx_dirty_delayed; 80 81 int tx_err; 82 }; 83 84 enum dmu_tx_hold_type { 85 THT_NEWOBJECT, 86 THT_WRITE, 87 THT_BONUS, 88 THT_FREE, 89 THT_ZAP, 90 THT_SPACE, 91 THT_SPILL, 92 THT_NUMTYPES 93 }; 94 95 typedef struct dmu_tx_hold { 96 dmu_tx_t *txh_tx; 97 list_node_t txh_node; 98 struct dnode *txh_dnode; 99 refcount_t txh_space_towrite; 100 refcount_t txh_memory_tohold; 101 enum dmu_tx_hold_type txh_type; 102 uint64_t txh_arg1; 103 uint64_t txh_arg2; 104 } dmu_tx_hold_t; 105 106 typedef struct dmu_tx_callback { 107 list_node_t dcb_node; /* linked to tx_callbacks list */ 108 dmu_tx_callback_func_t *dcb_func; /* caller function pointer */ 109 void *dcb_data; /* caller private data */ 110 } dmu_tx_callback_t; 111 112 /* 113 * These routines are defined in dmu.h, and are called by the user. 114 */ 115 dmu_tx_t *dmu_tx_create(objset_t *dd); 116 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 117 void dmu_tx_commit(dmu_tx_t *tx); 118 void dmu_tx_abort(dmu_tx_t *tx); 119 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 120 struct dsl_pool *dmu_tx_pool(dmu_tx_t *tx); 121 void dmu_tx_wait(dmu_tx_t *tx); 122 123 void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func, 124 void *dcb_data); 125 void dmu_tx_do_callbacks(list_t *cb_list, int error); 126 127 /* 128 * These routines are defined in dmu_spa.h, and are called by the SPA. 129 */ 130 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 131 132 /* 133 * These routines are only called by the DMU. 134 */ 135 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); 136 int dmu_tx_is_syncing(dmu_tx_t *tx); 137 int dmu_tx_private_ok(dmu_tx_t *tx); 138 void dmu_tx_add_new_object(dmu_tx_t *tx, dnode_t *dn); 139 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 140 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 141 142 #ifdef ZFS_DEBUG 143 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 144 #else 145 #define DMU_TX_DIRTY_BUF(tx, db) 146 #endif 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_DMU_TX_H */ 153