diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_tx.h')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_tx.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_tx.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_tx.h new file mode 100644 index 000000000000..82b8946e5f6d --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_tx.h @@ -0,0 +1,152 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2010 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ +/* + * Copyright (c) 2012, 2016 by Delphix. All rights reserved. + */ + +#ifndef _SYS_DMU_TX_H +#define _SYS_DMU_TX_H + +#include <sys/dmu.h> +#include <sys/txg.h> +#include <sys/refcount.h> + +#ifdef __cplusplus +extern "C" { +#endif + +struct dmu_buf_impl; +struct dmu_tx_hold; +struct dnode_link; +struct dsl_pool; +struct dnode; +struct dsl_dir; + +struct dmu_tx { + /* + * No synchronization is needed because a tx can only be handled + * by one thread. + */ + list_t tx_holds; /* list of dmu_tx_hold_t */ + objset_t *tx_objset; + struct dsl_dir *tx_dir; + struct dsl_pool *tx_pool; + uint64_t tx_txg; + uint64_t tx_lastsnap_txg; + uint64_t tx_lasttried_txg; + txg_handle_t tx_txgh; + void *tx_tempreserve_cookie; + struct dmu_tx_hold *tx_needassign_txh; + + /* list of dmu_tx_callback_t on this dmu_tx */ + list_t tx_callbacks; + + /* placeholder for syncing context, doesn't need specific holds */ + boolean_t tx_anyobj; + + /* transaction is marked as being a "net free" of space */ + boolean_t tx_netfree; + + /* time this transaction was created */ + hrtime_t tx_start; + + /* need to wait for sufficient dirty space */ + boolean_t tx_wait_dirty; + + /* has this transaction already been delayed? */ + boolean_t tx_dirty_delayed; + + int tx_err; +}; + +enum dmu_tx_hold_type { + THT_NEWOBJECT, + THT_WRITE, + THT_BONUS, + THT_FREE, + THT_ZAP, + THT_SPACE, + THT_SPILL, + THT_NUMTYPES +}; + +typedef struct dmu_tx_hold { + dmu_tx_t *txh_tx; + list_node_t txh_node; + struct dnode *txh_dnode; + zfs_refcount_t txh_space_towrite; + zfs_refcount_t txh_memory_tohold; + enum dmu_tx_hold_type txh_type; + uint64_t txh_arg1; + uint64_t txh_arg2; +} dmu_tx_hold_t; + +typedef struct dmu_tx_callback { + list_node_t dcb_node; /* linked to tx_callbacks list */ + dmu_tx_callback_func_t *dcb_func; /* caller function pointer */ + void *dcb_data; /* caller private data */ +} dmu_tx_callback_t; + +/* + * These routines are defined in dmu.h, and are called by the user. + */ +dmu_tx_t *dmu_tx_create(objset_t *dd); +int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how); +void dmu_tx_commit(dmu_tx_t *tx); +void dmu_tx_abort(dmu_tx_t *tx); +uint64_t dmu_tx_get_txg(dmu_tx_t *tx); +struct dsl_pool *dmu_tx_pool(dmu_tx_t *tx); +void dmu_tx_wait(dmu_tx_t *tx); + +void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func, + void *dcb_data); +void dmu_tx_do_callbacks(list_t *cb_list, int error); + +/* + * These routines are defined in dmu_spa.h, and are called by the SPA. + */ +extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg); + +/* + * These routines are only called by the DMU. + */ +dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd); +int dmu_tx_is_syncing(dmu_tx_t *tx); +int dmu_tx_private_ok(dmu_tx_t *tx); +void dmu_tx_add_new_object(dmu_tx_t *tx, dnode_t *dn); +void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db); +void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space); + +#ifdef ZFS_DEBUG +#define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db) +#else +#define DMU_TX_DIRTY_BUF(tx, db) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_DMU_TX_H */ |