192 lines
5.6 KiB
C
192 lines
5.6 KiB
C
/*
|
|
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2013 by Delphix. All rights reserved.
|
|
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _SYS_ARC_H
|
|
#define _SYS_ARC_H
|
|
|
|
#include <sys/zfs_context.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <sys/zio.h>
|
|
#include <sys/dmu.h>
|
|
#include <sys/spa.h>
|
|
#include <sys/refcount.h>
|
|
|
|
typedef struct arc_buf_hdr arc_buf_hdr_t;
|
|
typedef struct arc_buf arc_buf_t;
|
|
typedef struct arc_prune arc_prune_t;
|
|
typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private);
|
|
typedef void arc_prune_func_t(int64_t bytes, void *private);
|
|
typedef int arc_evict_func_t(void *private);
|
|
|
|
/* generic arc_done_func_t's which you can use */
|
|
arc_done_func_t arc_bcopy_func;
|
|
arc_done_func_t arc_getbuf_func;
|
|
|
|
/* generic arc_prune_func_t wrapper for callbacks */
|
|
struct arc_prune {
|
|
arc_prune_func_t *p_pfunc;
|
|
void *p_private;
|
|
list_node_t p_node;
|
|
refcount_t p_refcnt;
|
|
};
|
|
|
|
struct arc_buf {
|
|
arc_buf_hdr_t *b_hdr;
|
|
arc_buf_t *b_next;
|
|
kmutex_t b_evict_lock;
|
|
void *b_data;
|
|
arc_evict_func_t *b_efunc;
|
|
void *b_private;
|
|
};
|
|
|
|
typedef enum arc_buf_contents {
|
|
ARC_BUFC_DATA, /* buffer contains data */
|
|
ARC_BUFC_METADATA, /* buffer contains metadata */
|
|
ARC_BUFC_NUMTYPES
|
|
} arc_buf_contents_t;
|
|
/*
|
|
* These are the flags we pass into calls to the arc
|
|
*/
|
|
#define ARC_WAIT (1 << 1) /* perform I/O synchronously */
|
|
#define ARC_NOWAIT (1 << 2) /* perform I/O asynchronously */
|
|
#define ARC_PREFETCH (1 << 3) /* I/O is a prefetch */
|
|
#define ARC_CACHED (1 << 4) /* I/O was already in cache */
|
|
#define ARC_L2CACHE (1 << 5) /* cache in L2ARC */
|
|
#define ARC_L2COMPRESS (1 << 6) /* compress in L2ARC */
|
|
|
|
/*
|
|
* The following breakdows of arc_size exist for kstat only.
|
|
*/
|
|
typedef enum arc_space_type {
|
|
ARC_SPACE_DATA,
|
|
ARC_SPACE_HDRS,
|
|
ARC_SPACE_L2HDRS,
|
|
ARC_SPACE_OTHER,
|
|
ARC_SPACE_NUMTYPES
|
|
} arc_space_type_t;
|
|
|
|
typedef enum arc_state_type {
|
|
ARC_STATE_ANON,
|
|
ARC_STATE_MRU,
|
|
ARC_STATE_MRU_GHOST,
|
|
ARC_STATE_MFU,
|
|
ARC_STATE_MFU_GHOST,
|
|
ARC_STATE_L2C_ONLY,
|
|
ARC_STATE_NUMTYPES
|
|
} arc_state_type_t;
|
|
|
|
typedef struct arc_buf_info {
|
|
arc_state_type_t abi_state_type;
|
|
arc_buf_contents_t abi_state_contents;
|
|
uint64_t abi_state_index;
|
|
uint32_t abi_flags;
|
|
uint32_t abi_datacnt;
|
|
uint64_t abi_size;
|
|
uint64_t abi_spa;
|
|
uint64_t abi_access;
|
|
uint32_t abi_mru_hits;
|
|
uint32_t abi_mru_ghost_hits;
|
|
uint32_t abi_mfu_hits;
|
|
uint32_t abi_mfu_ghost_hits;
|
|
uint32_t abi_l2arc_hits;
|
|
uint32_t abi_holds;
|
|
uint64_t abi_l2arc_dattr;
|
|
uint64_t abi_l2arc_asize;
|
|
enum zio_compress abi_l2arc_compress;
|
|
} arc_buf_info_t;
|
|
|
|
void arc_space_consume(uint64_t space, arc_space_type_t type);
|
|
void arc_space_return(uint64_t space, arc_space_type_t type);
|
|
arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag,
|
|
arc_buf_contents_t type);
|
|
arc_buf_t *arc_loan_buf(spa_t *spa, int size);
|
|
void arc_return_buf(arc_buf_t *buf, void *tag);
|
|
void arc_loan_inuse_buf(arc_buf_t *buf, void *tag);
|
|
void arc_buf_add_ref(arc_buf_t *buf, void *tag);
|
|
boolean_t arc_buf_remove_ref(arc_buf_t *buf, void *tag);
|
|
void arc_buf_info(arc_buf_t *buf, arc_buf_info_t *abi, int state_index);
|
|
int arc_buf_size(arc_buf_t *buf);
|
|
void arc_release(arc_buf_t *buf, void *tag);
|
|
int arc_released(arc_buf_t *buf);
|
|
int arc_has_callback(arc_buf_t *buf);
|
|
void arc_buf_sigsegv(int sig, siginfo_t *si, void *unused);
|
|
void arc_buf_freeze(arc_buf_t *buf);
|
|
void arc_buf_thaw(arc_buf_t *buf);
|
|
boolean_t arc_buf_eviction_needed(arc_buf_t *buf);
|
|
#ifdef ZFS_DEBUG
|
|
int arc_referenced(arc_buf_t *buf);
|
|
#endif
|
|
|
|
int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
|
|
arc_done_func_t *done, void *private, zio_priority_t priority, int flags,
|
|
uint32_t *arc_flags, const zbookmark_t *zb);
|
|
zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
|
|
blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, boolean_t l2arc_compress,
|
|
const zio_prop_t *zp, arc_done_func_t *ready, arc_done_func_t *physdone,
|
|
arc_done_func_t *done, void *private, zio_priority_t priority,
|
|
int zio_flags, const zbookmark_t *zb);
|
|
|
|
arc_prune_t *arc_add_prune_callback(arc_prune_func_t *func, void *private);
|
|
void arc_remove_prune_callback(arc_prune_t *p);
|
|
void arc_freed(spa_t *spa, const blkptr_t *bp);
|
|
|
|
void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private);
|
|
int arc_buf_evict(arc_buf_t *buf);
|
|
|
|
void arc_adjust_meta(int64_t adjustment, boolean_t may_prune);
|
|
void arc_flush(spa_t *spa);
|
|
void arc_tempreserve_clear(uint64_t reserve);
|
|
int arc_tempreserve_space(uint64_t reserve, uint64_t txg);
|
|
|
|
void arc_init(void);
|
|
void arc_fini(void);
|
|
|
|
/*
|
|
* Level 2 ARC
|
|
*/
|
|
|
|
void l2arc_add_vdev(spa_t *spa, vdev_t *vd);
|
|
void l2arc_remove_vdev(vdev_t *vd);
|
|
boolean_t l2arc_vdev_present(vdev_t *vd);
|
|
void l2arc_init(void);
|
|
void l2arc_fini(void);
|
|
void l2arc_start(void);
|
|
void l2arc_stop(void);
|
|
|
|
#ifndef _KERNEL
|
|
extern boolean_t arc_watch;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_ARC_H */
|