Illumos #3964 L2ARC should always compress metadata buffers

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

diff --git a/include/sys/dmu.h b/include/sys/dmu.h
index 7fc876b..adaab4c 100644 (file)
--- a/include/sys/dmu.h
+++ b/include/sys/dmu.h
@@ -410,7 +410,7 @@ void dmu_write_policy(objset_t *os, struct dnode *dn, int level, int wp,
  * read db_data, dmu_buf_will_dirty() before modifying it, and the
  * object must be held in an assigned transaction before calling
  * dmu_buf_will_dirty.  You may use dmu_buf_set_user() on the bonus
- * buffer as well.  You must release your hold with dmu_buf_rele().
+ * buffer as well.  You must release what you hold with dmu_buf_rele().
  */
 int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **);
 int dmu_bonus_max(void);
@@ -432,8 +432,8 @@ int dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
  * Obtain the DMU buffer from the specified object which contains the
  * specified offset.  dmu_buf_hold() puts a "hold" on the buffer, so
  * that it will remain in memory.  You must release the hold with
- * dmu_buf_rele().  You musn't access the dmu_buf_t after releasing your
- * hold.  You must have a hold on any dmu_buf_t* you pass to the DMU.
+ * dmu_buf_rele().  You must not access the dmu_buf_t after releasing
+ * what you hold.  You must have a hold on any dmu_buf_t* you pass to the DMU.
  *
  * You must call dmu_buf_read, dmu_buf_will_dirty, or dmu_buf_will_fill
  * on the returned buffer before reading or writing the buffer's
@@ -641,7 +641,7 @@ typedef struct dmu_object_info {
        uint64_t doi_fill_count;                /* number of non-empty blocks */
 } dmu_object_info_t;
 
-typedef void arc_byteswap_func_t(void *buf, size_t size);
+typedef void (*const arc_byteswap_func_t)(void *buf, size_t size);
 
 typedef struct dmu_object_type_info {
        dmu_object_byteswap_t   ot_byteswap;
@@ -649,8 +649,8 @@ typedef struct dmu_object_type_info {
        char                    *ot_name;
 } dmu_object_type_info_t;
 
-typedef struct dmu_object_byteswap_info {
-       arc_byteswap_func_t     *ob_func;
+typedef const struct dmu_object_byteswap_info {
+       arc_byteswap_func_t      ob_func;
        char                    *ob_name;
 } dmu_object_byteswap_info_t;
 
@@ -731,7 +731,7 @@ extern uint64_t dmu_objset_syncprop(objset_t *os);
 extern uint64_t dmu_objset_logbias(objset_t *os);
 extern int dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
     uint64_t *id, uint64_t *offp, boolean_t *case_conflict);
-extern int dmu_snapshot_id(objset_t *os, const char *snapname, uint64_t *idp);
+extern int dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *val);
 extern int dmu_snapshot_realname(objset_t *os, char *name, char *real,
     int maxlen, boolean_t *conflict);
 extern int dmu_dir_list_next(objset_t *os, int namelen, char *name,
@@ -828,6 +828,8 @@ int dmu_diff(objset_t *tosnap, objset_t *fromsnap, struct vnode *vp,
 #define        ZFS_CRC64_POLY  0xC96C5795D7870F42ULL   /* ECMA-182, reflected form */
 extern uint64_t zfs_crc64_table[256];
 
+extern int zfs_mdcomp_disable;
+
 #ifdef __cplusplus
 }
 #endif