OpenZFS 9166 - zfs storage pool checkpoint

[mirror_zfs.git] / include / sys / fs / zfs.h

diff --git a/include/sys/fs/zfs.h b/include/sys/fs/zfs.h
index 870618ecb886c7c44fbd9c32b80d3fda1bdf747e..0ee9b00bd98d93fbd348aad888bdd03b0a90bbd0 100644 (file)
--- a/include/sys/fs/zfs.h
+++ b/include/sys/fs/zfs.h
@@ -239,6 +239,7 @@ typedef enum {
        ZPOOL_PROP_TNAME,
        ZPOOL_PROP_MAXDNODESIZE,
        ZPOOL_PROP_MULTIHOST,
+       ZPOOL_PROP_CHECKPOINT,
        ZPOOL_NUM_PROPS
 } zpool_prop_t;
 
@@ -616,6 +617,7 @@ typedef struct zpool_load_policy {
 #define        ZPOOL_CONFIG_DTL                "DTL"
 #define        ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 #define        ZPOOL_CONFIG_REMOVAL_STATS      "removal_stats" /* not stored on disk */
+#define        ZPOOL_CONFIG_CHECKPOINT_STATS   "checkpoint_stats" /* not on disk */
 #define        ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 #define        ZPOOL_CONFIG_INDIRECT_SIZE      "indirect_size" /* not stored on disk */
 
@@ -752,6 +754,8 @@ typedef struct zpool_load_policy {
        "com.delphix:indirect_obsolete_sm"
 #define        VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE \
        "com.delphix:obsolete_counts_are_precise"
+#define        VDEV_TOP_ZAP_POOL_CHECKPOINT_SM \
+       "com.delphix:pool_checkpoint_sm"
 
 /*
  * This is needed in userland to report the minimum necessary device size.
@@ -861,6 +865,18 @@ typedef enum pool_scrub_cmd {
        POOL_SCRUB_FLAGS_END
 } pool_scrub_cmd_t;
 
+typedef enum {
+       CS_NONE,
+       CS_CHECKPOINT_EXISTS,
+       CS_CHECKPOINT_DISCARDING,
+       CS_NUM_STATES
+} checkpoint_state_t;
+
+typedef struct pool_checkpoint_stat {
+       uint64_t pcs_state;             /* checkpoint_state_t */
+       uint64_t pcs_start_time;        /* time checkpoint/discard started */
+       uint64_t pcs_space;             /* checkpointed space */
+} pool_checkpoint_stat_t;
 
 /*
  * ZIO types.  Needed to interpret vdev statistics below.
@@ -958,7 +974,7 @@ typedef struct vdev_stat {
        uint64_t        vs_scan_removing;       /* removing?    */
        uint64_t        vs_scan_processed;      /* scan processed bytes */
        uint64_t        vs_fragmentation;       /* device fragmentation */
-
+       uint64_t        vs_checkpoint_space;    /* checkpoint-consumed space */
 } vdev_stat_t;
 
 /*
@@ -1144,6 +1160,8 @@ typedef enum zfs_ioc {
        ZFS_IOC_UNLOAD_KEY,
        ZFS_IOC_CHANGE_KEY,
        ZFS_IOC_REMAP,
+       ZFS_IOC_POOL_CHECKPOINT,
+       ZFS_IOC_POOL_DISCARD_CHECKPOINT,
 
        /*
         * Linux - 3/64 numbers reserved.
@@ -1166,6 +1184,22 @@ typedef enum zfs_ioc {
  */
 #define        BLKZNAME                _IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])
 
+/*
+ * ZFS-specific error codes used for returning descriptive errors
+ * to the userland through zfs ioctls.
+ *
+ * The enum implicitly includes all the error codes from errno.h.
+ * New code should use and extend this enum for errors that are
+ * not described precisely by generic errno codes.
+ */
+typedef enum {
+       ZFS_ERR_CHECKPOINT_EXISTS = 1024,
+       ZFS_ERR_DISCARDING_CHECKPOINT,
+       ZFS_ERR_NO_CHECKPOINT,
+       ZFS_ERR_DEVRM_IN_PROGRESS,
+       ZFS_ERR_VDEV_TOO_BIG
+} zfs_errno_t;
+
 /*
  * Internal SPA load state.  Used by FMA diagnosis engine.
  */
@@ -1235,6 +1269,7 @@ typedef enum {
 #define        ZFS_IMPORT_TEMP_NAME    0x10
 #define        ZFS_IMPORT_SKIP_MMP     0x20
 #define        ZFS_IMPORT_LOAD_KEYS    0x40
+#define        ZFS_IMPORT_CHECKPOINT   0x80
 
 /*
  * Channel program argument/return nvlist keys and defaults.