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.
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.
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]
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 * Copyright (c) 2013 by Delphix. All rights reserved.
32 #include <sys/inttypes.h>
35 #include <sys/refcount.h>
50 * No synchronization is needed because a tx can only be handled
53 list_t tx_holds; /* list of dmu_tx_hold_t */
55 struct dsl_dir *tx_dir;
56 struct dsl_pool *tx_pool;
58 uint64_t tx_lastsnap_txg;
59 uint64_t tx_lasttried_txg;
61 void *tx_tempreserve_cookie;
62 struct dmu_tx_hold *tx_needassign_txh;
64 /* list of dmu_tx_callback_t on this dmu_tx */
67 /* placeholder for syncing context, doesn't need specific holds */
70 /* has this transaction already been delayed? */
73 /* time this transaction was created */
76 /* need to wait for sufficient dirty space */
77 boolean_t tx_wait_dirty;
81 uint64_t tx_space_towrite;
82 uint64_t tx_space_tofree;
83 uint64_t tx_space_tooverwrite;
84 uint64_t tx_space_tounref;
85 refcount_t tx_space_written;
86 refcount_t tx_space_freed;
90 enum dmu_tx_hold_type {
101 typedef struct dmu_tx_hold {
103 list_node_t txh_node;
104 struct dnode *txh_dnode;
105 uint64_t txh_space_towrite;
106 uint64_t txh_space_tofree;
107 uint64_t txh_space_tooverwrite;
108 uint64_t txh_space_tounref;
109 uint64_t txh_memory_tohold;
112 enum dmu_tx_hold_type txh_type;
118 typedef struct dmu_tx_callback {
119 list_node_t dcb_node; /* linked to tx_callbacks list */
120 dmu_tx_callback_func_t *dcb_func; /* caller function pointer */
121 void *dcb_data; /* caller private data */
125 * Used for dmu tx kstat.
127 typedef struct dmu_tx_stats {
128 kstat_named_t dmu_tx_assigned;
129 kstat_named_t dmu_tx_delay;
130 kstat_named_t dmu_tx_error;
131 kstat_named_t dmu_tx_suspended;
132 kstat_named_t dmu_tx_group;
133 kstat_named_t dmu_tx_memory_reserve;
134 kstat_named_t dmu_tx_memory_reclaim;
135 kstat_named_t dmu_tx_dirty_throttle;
136 kstat_named_t dmu_tx_dirty_delay;
137 kstat_named_t dmu_tx_dirty_over_max;
138 kstat_named_t dmu_tx_quota;
141 extern dmu_tx_stats_t dmu_tx_stats;
143 #define DMU_TX_STAT_INCR(stat, val) \
144 atomic_add_64(&dmu_tx_stats.stat.value.ui64, (val));
145 #define DMU_TX_STAT_BUMP(stat) \
146 DMU_TX_STAT_INCR(stat, 1);
149 * These routines are defined in dmu.h, and are called by the user.
151 dmu_tx_t *dmu_tx_create(objset_t *dd);
152 int dmu_tx_assign(dmu_tx_t *tx, txg_how_t txg_how);
153 void dmu_tx_commit(dmu_tx_t *tx);
154 void dmu_tx_abort(dmu_tx_t *tx);
155 uint64_t dmu_tx_get_txg(dmu_tx_t *tx);
156 struct dsl_pool *dmu_tx_pool(dmu_tx_t *tx);
157 void dmu_tx_wait(dmu_tx_t *tx);
159 void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func,
161 void dmu_tx_do_callbacks(list_t *cb_list, int error);
164 * These routines are defined in dmu_spa.h, and are called by the SPA.
166 extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg);
169 * These routines are only called by the DMU.
171 dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd);
172 int dmu_tx_is_syncing(dmu_tx_t *tx);
173 int dmu_tx_private_ok(dmu_tx_t *tx);
174 void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, dnode_t *dn);
175 void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta);
176 void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db);
177 int dmu_tx_holds(dmu_tx_t *tx, uint64_t object);
178 void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space);
181 #define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db)
183 #define DMU_TX_DIRTY_BUF(tx, db)
186 void dmu_tx_init(void);
187 void dmu_tx_fini(void);
193 #endif /* _SYS_DMU_TX_H */