usr/src/uts/common/fs/zfs/sys/txg_impl.h

   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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_TXG_IMPL_H
  27 #define _SYS_TXG_IMPL_H
  28
  29 #include <sys/spa.h>
  30 #include <sys/txg.h>
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 struct tx_cpu {
  37         kmutex_t        tc_lock;
  38         kcondvar_t      tc_cv[TXG_SIZE];
  39         uint64_t        tc_count[TXG_SIZE];
  40         char            tc_pad[16];
  41 };
  42
  43 typedef struct tx_state {
  44         tx_cpu_t        *tx_cpu;        /* protects right to enter txg  */
  45         kmutex_t        tx_sync_lock;   /* protects tx_state_t */
  46         krwlock_t       tx_suspend;
  47         uint64_t        tx_open_txg;    /* currently open txg id */
  48         uint64_t        tx_quiesced_txg; /* quiesced txg waiting for sync */
  49         uint64_t        tx_syncing_txg; /* currently syncing txg id */
  50         uint64_t        tx_synced_txg;  /* last synced txg id */
  51
  52         uint64_t        tx_sync_txg_waiting; /* txg we're waiting to sync */
  53         uint64_t        tx_quiesce_txg_waiting; /* txg we're waiting to open */
  54
  55         kcondvar_t      tx_sync_more_cv;
  56         kcondvar_t      tx_sync_done_cv;
  57         kcondvar_t      tx_quiesce_more_cv;
  58         kcondvar_t      tx_quiesce_done_cv;
  59         kcondvar_t      tx_timeout_cv;
  60         kcondvar_t      tx_exit_cv;     /* wait for all threads to exit */
  61
  62         uint8_t         tx_threads;     /* number of threads */
  63         uint8_t         tx_exiting;     /* set when we're exiting */
  64
  65         kthread_t       *tx_sync_thread;
  66         kthread_t       *tx_quiesce_thread;
  67 } tx_state_t;
  68
  69 #ifdef  __cplusplus
  70 }
  71 #endif
  72
  73 #endif  /* _SYS_TXG_IMPL_H */