3246 ZFS I/O deadman thread

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

diff --git a/include/sys/zio.h b/include/sys/zio.h
index 4f20cab..0353033 100644 (file)
--- a/include/sys/zio.h
+++ b/include/sys/zio.h
@@ -21,9 +21,9 @@
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- */
-/*
  * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  */
 
 #ifndef _ZIO_H
@@ -107,6 +107,7 @@ enum zio_compress {
        ZIO_COMPRESS_GZIP_8,
        ZIO_COMPRESS_GZIP_9,
        ZIO_COMPRESS_ZLE,
+       ZIO_COMPRESS_LZ4,
        ZIO_COMPRESS_FUNCTIONS
 };
 
@@ -115,6 +116,7 @@ enum zio_compress {
 
 #define        BOOTFS_COMPRESS_VALID(compress)                 \
        ((compress) == ZIO_COMPRESS_LZJB ||             \
+       (compress) == ZIO_COMPRESS_LZ4 ||               \
        ((compress) == ZIO_COMPRESS_ON &&               \
        ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) ||  \
        (compress) == ZIO_COMPRESS_OFF)
@@ -193,7 +195,8 @@ enum zio_flag {
        ZIO_FLAG_RAW            = 1 << 21,
        ZIO_FLAG_GANG_CHILD     = 1 << 22,
        ZIO_FLAG_DDT_CHILD      = 1 << 23,
-       ZIO_FLAG_GODFATHER      = 1 << 24
+       ZIO_FLAG_GODFATHER      = 1 << 24,
+       ZIO_FLAG_FASTWRITE      = 1 << 25
 };
 
 #define        ZIO_FLAG_MUSTSUCCEED            0
@@ -277,6 +280,14 @@ typedef struct zbookmark {
 #define        ZB_ZIL_OBJECT           (0ULL)
 #define        ZB_ZIL_LEVEL            (-2LL)
 
+#define        ZB_IS_ZERO(zb)                                          \
+       ((zb)->zb_objset == 0 && (zb)->zb_object == 0 &&        \
+       (zb)->zb_level == 0 && (zb)->zb_blkid == 0)
+#define        ZB_IS_ROOT(zb)                          \
+       ((zb)->zb_object == ZB_ROOT_OBJECT &&   \
+       (zb)->zb_level == ZB_ROOT_LEVEL &&      \
+       (zb)->zb_blkid == ZB_ROOT_BLKID)
+
 typedef struct zio_prop {
        enum zio_checksum       zp_checksum;
        enum zio_compress       zp_compress;
@@ -294,6 +305,7 @@ typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
 typedef void zio_cksum_free_f(void *cbdata, size_t size);
 
 struct zio_bad_cksum;                          /* defined in zio_checksum.h */
+struct dnode_phys;
 
 struct zio_cksum_report {
        struct zio_cksum_report *zcr_next;
@@ -397,7 +409,10 @@ struct zio {
        const zio_vsd_ops_t *io_vsd_ops;
 
        uint64_t        io_offset;
-       uint64_t        io_deadline;
+       uint64_t        io_deadline;    /* expires at timestamp + deadline */
+       uint64_t        io_timestamp;   /* submitted at (ticks) */
+       uint64_t        io_delta;       /* vdev queue service delta (ticks) */
+       uint64_t        io_delay;       /* vdev disk service delta (ticks) */
        avl_node_t      io_offset_node;
        avl_node_t      io_deadline_node;
        avl_tree_t      *io_vdev_tree;
@@ -409,7 +424,6 @@ struct zio {
        enum zio_flag   io_orig_flags;
        enum zio_stage  io_orig_stage;
        enum zio_stage  io_orig_pipeline;
-       uint64_t        io_delay;
        int             io_error;
        int             io_child_error[ZIO_CHILD_TYPES];
        uint64_t        io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
@@ -475,7 +489,7 @@ extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
     const blkptr_t *bp, enum zio_flag flags);
 
 extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
-    blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
+    uint64_t size, boolean_t use_slog);
 extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
 extern void zio_flush(zio_t *zio, vdev_t *vd);
 extern void zio_shrink(zio_t *zio, uint64_t size);
@@ -546,6 +560,7 @@ extern int zio_handle_fault_injection(zio_t *zio, int error);
 extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
 extern int zio_handle_label_injection(zio_t *zio, int error);
 extern void zio_handle_ignored_writes(zio_t *zio);
+extern uint64_t zio_handle_io_delay(zio_t *zio);
 
 /*
  * Checksum ereport functions
@@ -566,6 +581,10 @@ extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
 /* Called from spa_sync(), but primarily an injection handler */
 extern void spa_handle_ignored_writes(spa_t *spa);
 
+/* zbookmark functions */
+boolean_t zbookmark_is_before(const struct dnode_phys *dnp,
+    const zbookmark_t *zb1, const zbookmark_t *zb2);
+
 #ifdef __cplusplus
 }
 #endif