Imported Upstream version 0.6.2+git20140204

[mirror_zfs-debian.git] / include / sys / ddt.h

diff --git a/include/sys/ddt.h b/include/sys/ddt.h
index 69432598b846ad982b5a23c98f5a540b08a09c72..3befcb84427c67b5ab77082410062d2698383bc5 100644 (file)
--- a/include/sys/ddt.h
+++ b/include/sys/ddt.h
@@ -63,16 +63,15 @@ enum ddt_class {
  */
 typedef struct ddt_key {
        zio_cksum_t     ddk_cksum;      /* 256-bit block checksum */
-       uint64_t        ddk_prop;       /* LSIZE, PSIZE, compression */
+       /*
+        * Encoded with logical & physical size, and compression, as follows:
+        *   +-------+-------+-------+-------+-------+-------+-------+-------+
+        *   |   0   |   0   |   0   | comp  |     PSIZE     |     LSIZE     |
+        *   +-------+-------+-------+-------+-------+-------+-------+-------+
+        */
+       uint64_t        ddk_prop;
 } ddt_key_t;
 
-/*
- * ddk_prop layout:
- *
- *     +-------+-------+-------+-------+-------+-------+-------+-------+
- *     |   0   |   0   |   0   | comp  |     PSIZE     |     LSIZE     |
- *     +-------+-------+-------+-------+-------+-------+-------+-------+
- */
 #define        DDK_GET_LSIZE(ddk)      \
        BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
 #define        DDK_SET_LSIZE(ddk, x)   \
@@ -217,6 +216,8 @@ extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
 extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
 extern void ddt_enter(ddt_t *ddt);
 extern void ddt_exit(ddt_t *ddt);
+extern void ddt_init(void);
+extern void ddt_fini(void);
 extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
 extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
 extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);