--- /dev/null
+/*
+ * 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) 2013 by Delphix. All rights reserved.
+ */
+
+#ifndef _SYS_DMU_TX_H
+#define _SYS_DMU_TX_H
+
+#include <sys/inttypes.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;
+
+ /* has this transaction already been delayed? */
+ boolean_t tx_waited;
+
+ /* time this transaction was created */
+ hrtime_t tx_start;
+
+ /* need to wait for sufficient dirty space */
+ boolean_t tx_wait_dirty;
+
+ int tx_err;
+#ifdef DEBUG_DMU_TX
+ uint64_t tx_space_towrite;
+ uint64_t tx_space_tofree;
+ uint64_t tx_space_tooverwrite;
+ uint64_t tx_space_tounref;
+ refcount_t tx_space_written;
+ refcount_t tx_space_freed;
+#endif
+};
+
+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;
+ uint64_t txh_space_towrite;
+ uint64_t txh_space_tofree;
+ uint64_t txh_space_tooverwrite;
+ uint64_t txh_space_tounref;
+ uint64_t txh_memory_tohold;
+ uint64_t txh_fudge;
+#ifdef DEBUG_DMU_TX
+ enum dmu_tx_hold_type txh_type;
+ uint64_t txh_arg1;
+ uint64_t txh_arg2;
+#endif
+} 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;
+
+/*
+ * Used for dmu tx kstat.
+ */
+typedef struct dmu_tx_stats {
+ kstat_named_t dmu_tx_assigned;
+ kstat_named_t dmu_tx_delay;
+ kstat_named_t dmu_tx_error;
+ kstat_named_t dmu_tx_suspended;
+ kstat_named_t dmu_tx_group;
+ kstat_named_t dmu_tx_memory_reserve;
+ kstat_named_t dmu_tx_memory_reclaim;
+ kstat_named_t dmu_tx_dirty_throttle;
+ kstat_named_t dmu_tx_dirty_delay;
+ kstat_named_t dmu_tx_dirty_over_max;
+ kstat_named_t dmu_tx_quota;
+} dmu_tx_stats_t;
+
+extern dmu_tx_stats_t dmu_tx_stats;
+
+#define DMU_TX_STAT_INCR(stat, val) \
+ atomic_add_64(&dmu_tx_stats.stat.value.ui64, (val));
+#define DMU_TX_STAT_BUMP(stat) \
+ DMU_TX_STAT_INCR(stat, 1);
+
+/*
+ * 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, txg_how_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, objset_t *os, uint64_t object);
+void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta);
+void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db);
+int dmu_tx_holds(dmu_tx_t *tx, uint64_t object);
+void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space);
+
+#ifdef DEBUG_DMU_TX
+#define DMU_TX_DIRTY_BUF(tx, db) dmu_tx_dirty_buf(tx, db)
+#else
+#define DMU_TX_DIRTY_BUF(tx, db)
+#endif
+
+void dmu_tx_init(void);
+void dmu_tx_fini(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_DMU_TX_H */
projects / mirror_ubuntu-artful-kernel.git / blobdiff