Illumos #3805 arc shouldn't cache freed blocks

[zfs.git] / include / sys / arc.h

diff --git a/include/sys/arc.h b/include/sys/arc.h
index 8f189c6..7911c9f 100644 (file)
--- a/include/sys/arc.h
+++ b/include/sys/arc.h
@@ -20,6 +20,7 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013 by Delphix. All rights reserved.
  */
 
 #ifndef        _SYS_ARC_H
@@ -34,16 +35,27 @@ extern "C" {
 #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;
@@ -98,6 +110,7 @@ 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
@@ -113,9 +126,14 @@ 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);
@@ -135,6 +153,11 @@ void l2arc_fini(void);
 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