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 dnode_link; 42 struct dsl_pool; 43 struct dnode; 44 struct dsl_dir; 45 46 struct dmu_tx { 47 /* 48 * No synchronization is needed because a tx can only be handled 49 * by one thread. 50 */ 51 list_t tx_holds; /* list of dmu_tx_hold_t */ 52 objset_t *tx_objset; 53 struct dsl_dir *tx_dir; 54 struct dsl_pool *tx_pool; 55 uint64_t tx_txg; 56 uint64_t tx_lastsnap_txg; 57 txg_handle_t tx_txgh; 58 uint64_t tx_space_towrite; 59 refcount_t tx_space_written; 60 uint64_t tx_space_tofree; 61 refcount_t tx_space_freed; 62 uint64_t tx_space_tooverwrite; 63 void *tx_tempreserve_cookie; 64 uint8_t tx_anyobj; 65 int tx_err; 66 #ifdef ZFS_DEBUG 67 char *tx_debug_buf; 68 int tx_debug_len; 69 #endif 70 }; 71 72 enum dmu_tx_hold_type { 73 THT_NEWOBJECT, 74 THT_WRITE, 75 THT_BONUS, 76 THT_FREE, 77 THT_ZAP, 78 THT_SPACE, 79 THT_NUMTYPES 80 }; 81 82 typedef struct dmu_tx_hold { 83 list_node_t dth_node; 84 struct dnode *dth_dnode; 85 enum dmu_tx_hold_type dth_type; 86 uint64_t dth_arg1; 87 uint64_t dth_arg2; 88 /* XXX track what the actual estimates were for this hold */ 89 } dmu_tx_hold_t; 90 91 92 /* 93 * These routines are defined in dmu.h, and are called by the user. 94 */ 95 dmu_tx_t *dmu_tx_create(objset_t *dd); 96 int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); 97 void dmu_tx_commit(dmu_tx_t *tx); 98 void dmu_tx_abort(dmu_tx_t *tx); 99 uint64_t dmu_tx_get_txg(dmu_tx_t *tx); 100 101 /* 102 * These routines are defined in dmu_spa.h, and are called by the SPA. 103 */ 104 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); 105 106 /* 107 * These routines are only called by the DMU. 108 */ 109 dmu_tx_t *dmu_tx_create_ds(dsl_dir_t *dd); 110 int dmu_tx_is_syncing(dmu_tx_t *tx); 111 int dmu_tx_private_ok(dmu_tx_t *tx); 112 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object); 113 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta); 114 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); 115 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object); 116 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); 117 118 #ifdef ZFS_DEBUG 119 120 extern int dmu_use_tx_debug_bufs; 121 122 #define dprintf_tx(tx, fmt, ...) \ 123 if (dmu_use_tx_debug_bufs) \ 124 do { \ 125 char *__bufp; \ 126 int __len; \ 127 if (tx->tx_debug_buf == NULL) { \ 128 __bufp = kmem_zalloc(4096, KM_SLEEP); \ 129 tx->tx_debug_buf = __bufp; \ 130 tx->tx_debug_len = __len = 4096; \ 131 } else { \ 132 __len = tx->tx_debug_len; \ 133 __bufp = &tx->tx_debug_buf[4096-__len]; \ 134 } \ 135 tx->tx_debug_len -= snprintf(__bufp, __len, fmt, __VA_ARGS__); \ 136 _NOTE(CONSTCOND) } while (0); \ 137 else dprintf(fmt, __VA_ARGS__) 138 139 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) 140 141 #else 142 143 #define dprintf_tx(tx, fmt, ...) 144 #define DMU_TX_DIRTY_BUF(tx, db) 145 146 #endif 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_DMU_TX_H */ 153