#include <sys/arc.h>
#include <sys/zfs_context.h>
#include <sys/refcount.h>
+#include <sys/zrlock.h>
#ifdef __cplusplus
extern "C" {
* etc.
*/
-#define LIST_LINK_INACTIVE(link) \
- ((link)->list_next == NULL && (link)->list_prev == NULL)
-
struct dmu_buf_impl;
typedef enum override_states {
struct objset *db_objset;
/*
- * the dnode we belong to (NULL when evicted)
+ * handle to safely access the dnode we belong to (NULL when evicted)
*/
- struct dnode *db_dnode;
+ struct dnode_handle *db_dnode_handle;
/*
* our parent buffer; if the dnode points to us directly,
- * db_parent == db_dnode->dn_dbuf
+ * db_parent == db_dnode_handle->dnh_dnode->dn_dbuf
* only accessed by sync thread ???
* (NULL when evicted)
+ * May change from NULL to non-NULL under the protection of db_mtx
+ * (see dbuf_check_blkptr())
*/
struct dmu_buf_impl *db_parent;
void dbuf_new_size(dmu_buf_impl_t *db, int size, dmu_tx_t *tx);
+#define DB_DNODE(_db) ((_db)->db_dnode_handle->dnh_dnode)
+#define DB_DNODE_LOCK(_db) ((_db)->db_dnode_handle->dnh_zrlock)
+#define DB_DNODE_ENTER(_db) (zrl_add(&DB_DNODE_LOCK(_db)))
+#define DB_DNODE_EXIT(_db) (zrl_remove(&DB_DNODE_LOCK(_db)))
+#define DB_DNODE_HELD(_db) (!zrl_is_zero(&DB_DNODE_LOCK(_db)))
+#define DB_GET_SPA(_spa_p, _db) { \
+ dnode_t *__dn; \
+ DB_DNODE_ENTER(_db); \
+ __dn = DB_DNODE(_db); \
+ *(_spa_p) = __dn->dn_objset->os_spa; \
+ DB_DNODE_EXIT(_db); \
+}
+#define DB_GET_OBJSET(_os_p, _db) { \
+ dnode_t *__dn; \
+ DB_DNODE_ENTER(_db); \
+ __dn = DB_DNODE(_db); \
+ *(_os_p) = __dn->dn_objset; \
+ DB_DNODE_EXIT(_db); \
+}
+
void dbuf_init(void);
void dbuf_fini(void);
-#define DBUF_IS_METADATA(db) \
- ((db)->db_level > 0 || dmu_ot[(db)->db_dnode->dn_type].ot_metadata)
+boolean_t dbuf_is_metadata(dmu_buf_impl_t *db);
+
+#define DBUF_IS_METADATA(_db) \
+ (dbuf_is_metadata(_db))
-#define DBUF_GET_BUFC_TYPE(db) \
- (DBUF_IS_METADATA(db) ? ARC_BUFC_METADATA : ARC_BUFC_DATA)
+#define DBUF_GET_BUFC_TYPE(_db) \
+ (DBUF_IS_METADATA(_db) ? ARC_BUFC_METADATA : ARC_BUFC_DATA)
-#define DBUF_IS_CACHEABLE(db) \
- ((db)->db_objset->os_primary_cache == ZFS_CACHE_ALL || \
- (DBUF_IS_METADATA(db) && \
- ((db)->db_objset->os_primary_cache == ZFS_CACHE_METADATA)))
+#define DBUF_IS_CACHEABLE(_db) \
+ ((_db)->db_objset->os_primary_cache == ZFS_CACHE_ALL || \
+ (DBUF_IS_METADATA(_db) && \
+ ((_db)->db_objset->os_primary_cache == ZFS_CACHE_METADATA)))
-#define DBUF_IS_L2CACHEABLE(db) \
- ((db)->db_objset->os_secondary_cache == ZFS_CACHE_ALL || \
- (DBUF_IS_METADATA(db) && \
- ((db)->db_objset->os_secondary_cache == ZFS_CACHE_METADATA)))
+#define DBUF_IS_L2CACHEABLE(_db) \
+ ((_db)->db_objset->os_secondary_cache == ZFS_CACHE_ALL || \
+ (DBUF_IS_METADATA(_db) && \
+ ((_db)->db_objset->os_secondary_cache == ZFS_CACHE_METADATA)))
#ifdef ZFS_DEBUG
sprintf_blkptr(__blkbuf, bp); \
dprintf_dbuf(db, fmt " %s\n", __VA_ARGS__, __blkbuf); \
kmem_free(__blkbuf, BP_SPRINTF_LEN); \
- } \
+ } \
_NOTE(CONSTCOND) } while (0)
#define DBUF_VERIFY(db) dbuf_verify(db)