*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013 by Delphix. All rights reserved.
*/
#ifndef _SYS_ARC_H
#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;
- krwlock_t b_data_lock;
void *b_data;
arc_evict_func_t *b_efunc;
void *b_private;
void arc_space_consume(uint64_t space, arc_space_type_t type);
void arc_space_return(uint64_t space, arc_space_type_t type);
-void *arc_data_buf_alloc(uint64_t space);
-void arc_data_buf_free(void *buf, uint64_t space);
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);
int arc_buf_remove_ref(arc_buf_t *buf, void *tag);
int arc_buf_size(arc_buf_t *buf);
void arc_release(arc_buf_t *buf, void *tag);
-int arc_release_bp(arc_buf_t *buf, void *tag, blkptr_t *bp, spa_t *spa,
- zbookmark_t *zb);
int arc_released(arc_buf_t *buf);
int arc_has_callback(arc_buf_t *buf);
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_buf_t *pbuf,
- arc_done_func_t *done, void *private, int priority, int zio_flags,
- uint32_t *arc_flags, const zbookmark_t *zb);
-int arc_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bp,
+int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
arc_done_func_t *done, void *private, int priority, int flags,
uint32_t *arc_flags, const zbookmark_t *zb);
zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
arc_done_func_t *ready, arc_done_func_t *done, void *private,
int 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 l2arc_start(void);
void l2arc_stop(void);
+/* Global tunings */
+extern int zfs_write_limit_shift;
+extern unsigned long zfs_write_limit_max;
+extern kmutex_t zfs_write_limit_lock;
+
#ifdef __cplusplus
}
#endif