3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_scan.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_pool.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_dataset.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_prop.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_dir.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dsl_synctask.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dnode.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dmu_tx.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/dmu_objset.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/arc.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zap.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zio.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zfs_context.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/fs/zfs.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zfs_znode.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/spa_impl.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/vdev_impl.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zil_impl.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zio_checksum.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/ddt.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/sa.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/sa_impl.h>

ad135b5d644628e791c3188a6ecbd9c257961ef8Christopher Siden#include <sys/zfeature.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#ifdef _KERNEL

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#include <sys/zfs_vfsops.h>

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#endif

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingtypedef int (scan_cb_t)(dsl_pool_t *, const blkptr_t *, const zbookmark_t *);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic scan_cb_t dsl_scan_defrag_cb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic scan_cb_t dsl_scan_scrub_cb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic scan_cb_t dsl_scan_remove_cb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic dsl_syncfunc_t dsl_scan_cancel_sync;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void dsl_scan_sync_state(dsl_scan_t *, dmu_tx_t *tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilsonint zfs_top_maxinflight = 32; /* maximum I/Os per top-level */

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilsonint zfs_resilver_delay = 2; /* number of ticks to delay resilver */

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilsonint zfs_scrub_delay = 4; /* number of ticks to delay scrub */

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilsonint zfs_scan_idle = 50; /* idle window in clock ticks */

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingint zfs_scan_min_time_ms = 1000; /* min millisecs to scrub per txg */

cde58dbc6a23d4d38db7c8866312be83221c765fMatthew Ahrensint zfs_free_min_time_ms = 1000; /* min millisecs to free per txg */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingint zfs_resilver_min_time_ms = 3000; /* min millisecs to resilver per txg */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingboolean_t zfs_no_scrub_io = B_FALSE; /* set to disable scrub i/o */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingboolean_t zfs_no_scrub_prefetch = B_FALSE; /* set to disable srub prefetching */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingenum ddt_class zfs_scrub_ddt_class_max = DDT_CLASS_DUPLICATE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingint dsl_scan_delay_completion = B_FALSE; /* set to delay scan completion */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling#define DSL_SCAN_IS_SCRUB_RESILVER(scn) \

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ((scn)->scn_phys.scn_func == POOL_SCAN_SCRUB || \

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (scn)->scn_phys.scn_func == POOL_SCAN_RESILVER)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingextern int zfs_txg_timeout;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic scan_cb_t *scan_funcs[POOL_SCAN_FUNCS] = {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling NULL,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_scrub_cb, /* POOL_SCAN_SCRUB */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_scrub_cb, /* POOL_SCAN_RESILVER */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling};

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_init(dsl_pool_t *dp, uint64_t txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_t *spa = dp->dp_spa;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t f;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn = dp->dp_scan = kmem_zalloc(sizeof (dsl_scan_t), KM_SLEEP);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_dp = dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_func", sizeof (uint64_t), 1, &f);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err == 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_restart_txg = txg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("old-style scrub was in progress; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "restarting new-style scrub in txg %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_restart_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_queue", sizeof (uint64_t), 1,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &scn->scn_phys.scn_queue_obj);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_POOL_SCAN, sizeof (uint64_t), SCAN_PHYS_NUMINTS,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &scn->scn_phys);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err == ENOENT)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling else if (err)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state == DSS_SCANNING &&

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_prev_software_version(dp->dp_spa) < SPA_VERSION_SCAN) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_restart_txg = txg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("new-style scrub was modified "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "by old software; restarting in txg %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_restart_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_scan_stat_init(spa);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_fini(dsl_pool_t *dp)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dp->dp_scan) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling kmem_free(dp->dp_scan, sizeof (dsl_scan_t));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dp->dp_scan = NULL;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_setup_check(void *arg1, void *arg2, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = arg1;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state == DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (EBUSY);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_setup_sync(void *arg1, void *arg2, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = arg1;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling pool_scan_func_t *funcp = arg2;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_object_type_t ot = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = scn->scn_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_t *spa = dp->dp_spa;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(scn->scn_phys.scn_state != DSS_SCANNING);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(*funcp > POOL_SCAN_NONE && *funcp < POOL_SCAN_FUNCS);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling bzero(&scn->scn_phys, sizeof (scn->scn_phys));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_func = *funcp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_state = DSS_SCANNING;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_min_txg = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_max_txg = tx->tx_txg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_ddt_class_max = DDT_CLASSES - 1; /* the entire DDT */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_start_time = gethrestime_sec();

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_errors = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_to_examine = spa->spa_root_vdev->vdev_stat.vs_alloc;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_restart_txg = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_scan_stat_init(spa);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_ddt_class_max = zfs_scrub_ddt_class_max;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* rewrite all disk labels */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling vdev_config_dirty(spa->spa_root_vdev);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (vdev_resilver_needed(spa->spa_root_vdev,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &scn->scn_phys.scn_min_txg, &scn->scn_phys.scn_max_txg)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_event_notify(spa, NULL, ESC_ZFS_RESILVER_START);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_event_notify(spa, NULL, ESC_ZFS_SCRUB_START);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa->spa_scrub_started = B_TRUE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_min_txg > TXG_INITIAL)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_ddt_class_max = DDT_CLASS_DITTO;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* back to the generic stuff */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dp->dp_blkstats == NULL) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dp->dp_blkstats =

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling kmem_alloc(sizeof (zfs_all_blkstats_t), KM_SLEEP);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling bzero(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (spa_version(spa) < SPA_VERSION_DSL_SCRUB)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ot = DMU_OT_ZAP_OTHER;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj = zap_create(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ot ? ot : DMU_OT_SCAN_QUEUE, DMU_OT_NONE, 0, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_sync_state(scn, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

4445fffbbb1ea25fd0e9ea68b9380dd7a6709025Matthew Ahrens spa_history_log_internal(spa, "scan setup", tx,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "func=%u mintxg=%llu maxtxg=%llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling *funcp, scn->scn_phys.scn_min_txg, scn->scn_phys.scn_max_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_done(dsl_scan_t *scn, boolean_t complete, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling static const char *old_names[] = {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_bookmark",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_ddt_bookmark",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_ddt_class_max",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_queue",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_min_txg",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_max_txg",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_func",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "scrub_errors",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling NULL

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling };

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = scn->scn_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_t *spa = dp->dp_spa;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int i;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* Remove any remnants of an old-style scrub. */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (i = 0; old_names[i]; i++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) zap_remove(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_POOL_DIRECTORY_OBJECT, old_names[i], tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_queue_obj != 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == dmu_object_free(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (complete)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_state = DSS_FINISHED;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling else

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_state = DSS_CANCELED;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

4445fffbbb1ea25fd0e9ea68b9380dd7a6709025Matthew Ahrens spa_history_log_internal(spa, "scan done", tx,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "complete=%u", complete);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling mutex_enter(&spa->spa_scrub_lock);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling while (spa->spa_scrub_inflight > 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling cv_wait(&spa->spa_scrub_io_cv,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &spa->spa_scrub_lock);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling mutex_exit(&spa->spa_scrub_lock);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa->spa_scrub_started = B_FALSE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa->spa_scrub_active = B_FALSE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling vdev_dtl_reassess(spa->spa_root_vdev, tx->tx_txg,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling complete ? scn->scn_phys.scn_max_txg : 0, B_TRUE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (complete) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_event_notify(spa, NULL, scn->scn_phys.scn_min_txg ?

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ESC_ZFS_RESILVER_FINISH : ESC_ZFS_SCRUB_FINISH);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_errlog_rotate(spa);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_end_time = gethrestime_sec();

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_cancel_check(void *arg1, void *arg2, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = arg1;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (ENOENT);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_cancel_sync(void *arg1, void *arg2, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = arg1;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_done(scn, B_FALSE, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_sync_state(scn, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_cancel(dsl_pool_t *dp)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling boolean_t complete = B_FALSE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = dsl_sync_task_do(dp, dsl_scan_cancel_check,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_cancel_sync, dp->dp_scan, &complete, 3);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void dsl_scan_visitbp(blkptr_t *bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling const zbookmark_t *zb, dnode_phys_t *dnp, arc_buf_t *pbuf,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *ds, dsl_scan_t *scn, dmu_objset_type_t ostype,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_tx_t *tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void dsl_scan_visitdnode(dsl_scan_t *, dsl_dataset_t *ds,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_objset_type_t ostype,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dnode_phys_t *dnp, arc_buf_t *buf, uint64_t object, dmu_tx_t *tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bp)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zio_free(dp->dp_spa, txg, bp);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(dsl_pool_sync_context(dp));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zio_nowait(zio_free_sync(pio, dp->dp_spa, txg, bpp, pio->io_flags));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_done_func_t *done, void *private, int priority, int zio_flags,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t *arc_flags, const zbookmark_t *zb)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (arc_read(pio, spa, bpp, pbuf, done, private,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling priority, zio_flags, arc_flags, zb));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_done_func_t *done, void *private, int priority, int zio_flags,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t *arc_flags, const zbookmark_t *zb)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (arc_read_nolock(pio, spa, bpp, done, private,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling priority, zio_flags, arc_flags, zb));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic uint64_t

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ds_maxtxg(dsl_dataset_t *ds)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t smt = ds->ds_dir->dd_pool->dp_scan->scn_phys.scn_max_txg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_dataset_is_snapshot(ds))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (MIN(smt, ds->ds_phys->ds_creation_txg));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (smt);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_sync_state(dsl_scan_t *scn, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == zap_update(scn->scn_dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_POOL_DIRECTORY_OBJECT,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_POOL_SCAN, sizeof (uint64_t), SCAN_PHYS_NUMINTS,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &scn->scn_phys, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic boolean_t

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_check_pause(dsl_scan_t *scn, const zbookmark_t *zb)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t elapsed_nanosecs;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int mintime;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* we never skip user/group accounting objects */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (zb && (int64_t)zb->zb_object < 0)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_FALSE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_pausing)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_TRUE); /* we're already pausing */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

ad135b5d644628e791c3188a6ecbd9c257961ef8Christopher Siden if (!ZB_IS_ZERO(&scn->scn_phys.scn_bookmark))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_FALSE); /* we're resuming */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* We only know how to resume from level-0 blocks. */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (zb && zb->zb_level != 0)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_FALSE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling mintime = (scn->scn_phys.scn_func == POOL_SCAN_RESILVER) ?

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_resilver_min_time_ms : zfs_scan_min_time_ms;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling elapsed_nanosecs = gethrtime() - scn->scn_sync_start_time;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (elapsed_nanosecs / NANOSEC > zfs_txg_timeout ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (elapsed_nanosecs / MICROSEC > mintime &&

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling txg_sync_waiting(scn->scn_dp)) ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling spa_shutting_down(scn->scn_dp->dp_spa)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (zb) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf("pausing at bookmark %llx/%llx/%llx/%llx\n",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_level,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_blkid);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_bookmark = *zb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf("pausing at DDT bookmark %llx/%llx/%llx/%llx\n",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_class,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_type,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_checksum,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_cursor);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_pausing = B_TRUE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_TRUE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_FALSE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingtypedef struct zil_scan_arg {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *zsa_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_header_t *zsa_zh;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling} zil_scan_arg_t;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_scan_arg_t *zsa = arg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = zsa->zsa_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_header_t *zh = zsa->zsa_zh;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t zb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(dp->dp_spa))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&zb, zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET],

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == scan_funcs[scn->scn_phys.scn_func](dp, bp, &zb));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (lrc->lrc_txtype == TX_WRITE) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_scan_arg_t *zsa = arg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = zsa->zsa_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_header_t *zh = zsa->zsa_zh;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling lr_write_t *lr = (lr_write_t *)lrc;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling blkptr_t *bp = &lr->lr_blkptr;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t zb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (claim_txg == 0 || bp->blk_birth < claim_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&zb, zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET],

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling lr->lr_foid, ZB_ZIL_LEVEL,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling lr->lr_offset / BP_GET_LSIZE(bp));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == scan_funcs[scn->scn_phys.scn_func](dp, bp, &zb));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_zil(dsl_pool_t *dp, zil_header_t *zh)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t claim_txg = zh->zh_claim_txg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_scan_arg_t zsa = { dp, zh };

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zilog_t *zilog;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (claim_txg == 0 && spa_writeable(dp->dp_spa))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zilog = zil_alloc(dp->dp_meta_objset, zh);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) zil_parse(zilog, dsl_scan_zil_block, dsl_scan_zil_record, &zsa,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling claim_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zil_free(zilog);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_prefetch(dsl_scan_t *scn, arc_buf_t *buf, blkptr_t *bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t objset, uint64_t object, uint64_t blkid)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t czb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t flags = ARC_NOWAIT | ARC_PREFETCH;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (zfs_no_scrub_prefetch)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (BP_IS_HOLE(bp) || bp->blk_birth <= scn->scn_phys.scn_min_txg ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&czb, objset, object, BP_GET_LEVEL(bp), blkid);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

cde58dbc6a23d4d38db7c8866312be83221c765fMatthew Ahrens (void) arc_read(scn->scn_zio_root, scn->scn_dp->dp_spa, bp,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson buf, NULL, NULL, ZIO_PRIORITY_ASYNC_READ,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson ZIO_FLAG_CANFAIL | ZIO_FLAG_SCAN_THREAD, &flags, &czb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic boolean_t

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_check_resume(dsl_scan_t *scn, const dnode_phys_t *dnp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling const zbookmark_t *zb)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

ad135b5d644628e791c3188a6ecbd9c257961ef8Christopher Siden if (!ZB_IS_ZERO(&scn->scn_phys.scn_bookmark) &&

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (int64_t)zb->zb_object >= 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

ad135b5d644628e791c3188a6ecbd9c257961ef8Christopher Siden if (zbookmark_is_before(dnp, zb, &scn->scn_phys.scn_bookmark))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_TRUE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bcmp(zb, &scn->scn_phys.scn_bookmark, sizeof (*zb)) == 0 ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_object > scn->scn_phys.scn_bookmark.zb_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf("resuming at %llx/%llx/%llx/%llx\n",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_level,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)zb->zb_blkid);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling bzero(&scn->scn_phys.scn_bookmark, sizeof (*zb));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (B_FALSE);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_recurse(dsl_scan_t *scn, dsl_dataset_t *ds, dmu_objset_type_t ostype,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dnode_phys_t *dnp, const blkptr_t *bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling const zbookmark_t *zb, dmu_tx_t *tx, arc_buf_t **bufp)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = scn->scn_dp;

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson int zio_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCAN_THREAD;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (BP_GET_LEVEL(bp) > 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t flags = ARC_WAIT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int i;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling blkptr_t *cbp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = arc_read_nolock(NULL, dp->dp_spa, bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_getbuf_func, bufp,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_errors++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (i = 0, cbp = (*bufp)->b_data; i < epb; i++, cbp++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_prefetch(scn, *bufp, cbp, zb->zb_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_object, zb->zb_blkid * epb + i);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (i = 0, cbp = (*bufp)->b_data; i < epb; i++, cbp++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t czb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_level - 1,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_blkid * epb + i);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitbp(cbp, &czb, dnp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling *bufp, ds, scn, ostype, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (BP_GET_TYPE(bp) == DMU_OT_USERGROUP_USED) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t flags = ARC_WAIT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = arc_read_nolock(NULL, dp->dp_spa, bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_getbuf_func, bufp,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_errors++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t flags = ARC_WAIT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dnode_phys_t *cdnp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int i, j;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = arc_read_nolock(NULL, dp->dp_spa, bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_getbuf_func, bufp,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_errors++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (i = 0, cdnp = (*bufp)->b_data; i < epb; i++, cdnp++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (j = 0; j < cdnp->dn_nblkptr; j++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling blkptr_t *cbp = &cdnp->dn_blkptr[j];

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_prefetch(scn, *bufp, cbp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_objset, zb->zb_blkid * epb + i, j);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (i = 0, cdnp = (*bufp)->b_data; i < epb; i++, cdnp++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitdnode(scn, ds, ostype,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling cdnp, *bufp, zb->zb_blkid * epb + i, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint32_t flags = ARC_WAIT;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling objset_phys_t *osp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = arc_read_nolock(NULL, dp->dp_spa, bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_getbuf_func, bufp,

44ecc5327ab4ce0750dcca2a17e05566bf2812e2George Wilson ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_errors++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling osp = (*bufp)->b_data;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitdnode(scn, ds, osp->os_type,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &osp->os_meta_dnode, *bufp, DMU_META_DNODE_OBJECT, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (OBJSET_BUF_HAS_USERUSED(*bufp)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitdnode(scn, ds, osp->os_type,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &osp->os_groupused_dnode, *bufp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_GROUPUSED_OBJECT, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitdnode(scn, ds, osp->os_type,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &osp->os_userused_dnode, *bufp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling DMU_USERUSED_OBJECT, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_visitdnode(dsl_scan_t *scn, dsl_dataset_t *ds,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_objset_type_t ostype, dnode_phys_t *dnp, arc_buf_t *buf,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t object, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int j;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (j = 0; j < dnp->dn_nblkptr; j++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t czb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&czb, ds ? ds->ds_object : 0, object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dnp->dn_nlevels - 1, j);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitbp(&dnp->dn_blkptr[j],

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &czb, dnp, buf, ds, scn, ostype, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t czb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&czb, ds ? ds->ds_object : 0, object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling 0, DMU_SPILL_BLKID);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitbp(&dnp->dn_spill,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &czb, dnp, buf, ds, scn, ostype, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_visitbp(blkptr_t *bp, const zbookmark_t *zb,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dnode_phys_t *dnp, arc_buf_t *pbuf,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *ds, dsl_scan_t *scn, dmu_objset_type_t ostype,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = scn->scn_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling arc_buf_t *buf = NULL;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling blkptr_t bp_toread = *bp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* ASSERT(pbuf == NULL || arc_released(pbuf)); */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_scan_check_pause(scn, zb))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_scan_check_resume(scn, dnp, zb))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bp->blk_birth == 0)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_visited_this_txg++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf_bp(bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "visiting ds=%p/%llu zb=%llx/%llx/%llx/%llx buf=%p bp=%p",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds, ds ? ds->ds_object : 0,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zb->zb_objset, zb->zb_object, zb->zb_level, zb->zb_blkid,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling pbuf, bp);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_scan_recurse(scn, ds, ostype, dnp, &bp_toread, zb, tx,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling &buf) != 0)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ddt_class_contains(dp->dp_spa,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_ddt_class_max, bp)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(buf == NULL);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (bp->blk_birth <= scn->scn_phys.scn_cur_max_txg) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scan_funcs[scn->scn_phys.scn_func](dp, bp, zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (buf)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) arc_buf_remove_ref(buf, &buf);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_visit_rootbp(dsl_scan_t *scn, dsl_dataset_t *ds, blkptr_t *bp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t zb;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visitbp(bp, &zb, NULL, NULL,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds, scn, DMU_OST_NONE, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf_ds(ds, "finished scan%s", "");

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ds_destroyed(dsl_dataset_t *ds, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = ds->ds_dir->dd_pool;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t mintxg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_bookmark.zb_objset == ds->ds_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_dataset_is_snapshot(ds)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* Note, scn_cur_{min,max}_txg stays the same. */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_bookmark.zb_objset =

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_next_snap_obj;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("destroying ds %llu; currently traversing; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "reset zb_objset to %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_phys->ds_next_snap_obj);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_flags |= DSF_VISIT_DS_AGAIN;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling SET_BOOKMARK(&scn->scn_phys.scn_bookmark,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ZB_DESTROYED_OBJSET, 0, 0, 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("destroying ds %llu; currently traversing; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "reset bookmark to -1,0,0,0",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (zap_lookup_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object, &mintxg) == 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT3U(ds->ds_phys->ds_num_children, <=, 1);

b420f3adeb349714478d1a7813d2c0e069d41555Richard Lowe VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_dataset_is_snapshot(ds)) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_next_snap_obj, mintxg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("destroying ds %llu; in queue; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "replacing with %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_phys->ds_next_snap_obj);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("destroying ds %llu; in queue; removing",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("destroying ds %llu; ignoring",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_sync_state(scn, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ds_snapshotted(dsl_dataset_t *ds, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = ds->ds_dir->dd_pool;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t mintxg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(ds->ds_phys->ds_prev_snap_obj != 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_bookmark.zb_objset == ds->ds_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_bookmark.zb_objset =

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_prev_snap_obj;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("snapshotting ds %llu; currently traversing; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "reset zb_objset to %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_phys->ds_prev_snap_obj);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (zap_lookup_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object, &mintxg) == 0) {

b420f3adeb349714478d1a7813d2c0e069d41555Richard Lowe VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_prev_snap_obj, mintxg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("snapshotting ds %llu; in queue; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "replacing with %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds->ds_phys->ds_prev_snap_obj);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_sync_state(scn, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ds_clone_swapped(dsl_dataset_t *ds1, dsl_dataset_t *ds2, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = ds1->ds_dir->dd_pool;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t mintxg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_bookmark.zb_objset == ds1->ds_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_bookmark.zb_objset = ds2->ds_object;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("clone_swap ds %llu; currently traversing; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "reset zb_objset to %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds1->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds2->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (scn->scn_phys.scn_bookmark.zb_objset == ds2->ds_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_bookmark.zb_objset = ds1->ds_object;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("clone_swap ds %llu; currently traversing; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "reset zb_objset to %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds2->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds1->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (zap_lookup_int_key(dp->dp_meta_objset, scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds1->ds_object, &mintxg) == 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT3U(mintxg, ==, ds1->ds_phys->ds_prev_snap_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT3U(mintxg, ==, ds2->ds_phys->ds_prev_snap_txg);

b420f3adeb349714478d1a7813d2c0e069d41555Richard Lowe VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds1->ds_object, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds2->ds_object, mintxg, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(err == 0 || err == EEXIST);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err == EEXIST) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* Both were there to begin with */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds1->ds_object, mintxg, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("clone_swap ds %llu; in queue; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "replacing with %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds1->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds2->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else if (zap_lookup_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds2->ds_object, &mintxg) == 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT3U(mintxg, ==, ds1->ds_phys->ds_prev_snap_txg);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT3U(mintxg, ==, ds2->ds_phys->ds_prev_snap_txg);

b420f3adeb349714478d1a7813d2c0e069d41555Richard Lowe VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds2->ds_object, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(0 == zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds1->ds_object, mintxg, tx));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("clone_swap ds %llu; in queue; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "replacing with %llu",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds2->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (u_longlong_t)ds1->ds_object);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_sync_state(scn, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstruct enqueue_clones_arg {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_tx_t *tx;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t originobj;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling};

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingenqueue_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling struct enqueue_clones_arg *eca = arg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *ds;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = spa->spa_dsl_pool;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ds->ds_dir->dd_phys->dd_origin_obj == eca->originobj) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling while (ds->ds_phys->ds_prev_snap_obj != eca->originobj) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *prev;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = dsl_dataset_hold_obj(dp,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_prev_snap_obj, FTAG, &prev);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds = prev;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_prev_snap_txg, eca->tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_visitds(dsl_scan_t *scn, uint64_t dsobj, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = scn->scn_dp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *ds;

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens objset_t *os;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

b420f3adeb349714478d1a7813d2c0e069d41555Richard Lowe VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens if (dmu_objset_from_ds(ds, &os))

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens goto out;

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens /*

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens if (DSL_SCAN_IS_SCRUB_RESILVER(scn) && !dsl_dataset_is_snapshot(ds))

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens dsl_scan_zil(dp, &os->os_zil_header);

6e0cbcaa0c6f2bc34634a4cc17b099f9ecef03d1Matthew Ahrens

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_buf_will_dirty(ds->ds_dbuf, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_visit_rootbp(scn, ds, &ds->ds_phys->ds_bp, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling char *dsname = kmem_alloc(ZFS_MAXNAMELEN, KM_SLEEP);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_name(ds, dsname);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("scanned dataset %llu (%s) with min=%llu max=%llu; "

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling "pausing=%u",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)dsobj, dsname,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_cur_min_txg,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)scn->scn_phys.scn_cur_max_txg,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (int)scn->scn_pausing);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling kmem_free(dsname, ZFS_MAXNAMELEN);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_pausing)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling goto out;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_flags & DSF_VISIT_DS_AGAIN) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("incomplete pass; visiting again");

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_flags &= ~DSF_VISIT_DS_AGAIN;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_object,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_cur_max_txg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling goto out;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ds->ds_phys->ds_next_snap_obj != 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj, ds->ds_phys->ds_next_snap_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_creation_txg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ds->ds_phys->ds_num_children > 1) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling boolean_t usenext = B_FALSE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ds->ds_phys->ds_next_clones_obj != 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t count;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err = zap_count(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_next_clones_obj, &count);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err == 0 &&

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling count == ds->ds_phys->ds_num_children - 1)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling usenext = B_TRUE;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (usenext) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_join_key(dp->dp_meta_objset,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_next_clones_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_phys->ds_creation_txg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling } else {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling struct enqueue_clones_arg eca;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling eca.tx = tx;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling eca.originobj = ds->ds_object;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (void) dmu_objset_find_spa(ds->ds_dir->dd_pool->dp_spa,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling NULL, enqueue_clones_cb, &eca, DS_FIND_CHILDREN);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingout:

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic int

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingenqueue_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dmu_tx_t *tx = arg;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *ds;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int err;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_pool_t *dp = spa->spa_dsl_pool;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_t *scn = dp->dp_scan;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling while (ds->ds_phys->ds_prev_snap_obj != 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_t *prev;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling FTAG, &prev);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (err) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (err);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /*

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(prev, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds = prev;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling VERIFY(zap_add_int_key(dp->dp_meta_objset, scn->scn_phys.scn_queue_obj,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ds->ds_object, ds->ds_phys->ds_prev_snap_txg, tx) == 0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_dataset_rele(ds, FTAG);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return (0);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ddt(dsl_scan_t *scn, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_bookmark_t *ddb = &scn->scn_phys.scn_ddt_bookmark;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_entry_t dde = { 0 };

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling int error;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling uint64_t n = 0;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling while ((error = ddt_walk(scn->scn_dp->dp_spa, ddb, &dde)) == 0) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_t *ddt;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ddb->ddb_class > scn->scn_phys.scn_ddt_class_max)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling break;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dprintf("visiting ddb=%llu/%llu/%llu/%llx\n",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)ddb->ddb_class,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)ddb->ddb_type,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)ddb->ddb_checksum,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)ddb->ddb_cursor);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling /* There should be no pending changes to the dedup table */

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt = scn->scn_dp->dp_spa->spa_ddt[ddb->ddb_checksum];

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(avl_first(&ddt->ddt_tree) == NULL);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling dsl_scan_ddt_entry(scn, ddb->ddb_checksum, &dde, tx);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling n++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (dsl_scan_check_pause(scn, NULL))

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling break;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zfs_dbgmsg("scanned %llu ddt entries with class_max = %u; pausing=%u",

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (longlong_t)n, (int)scn->scn_phys.scn_ddt_class_max,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling (int)scn->scn_pausing);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(error == 0 || error == ENOENT);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ASSERT(error != ENOENT ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddb->ddb_class > scn->scn_phys.scn_ddt_class_max);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_entry_t *dde, dmu_tx_t *tx)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling{

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling const ddt_key_t *ddk = &dde->dde_key;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_phys_t *ddp = dde->dde_phys;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling blkptr_t bp;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling zbookmark_t zb = { 0 };

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (scn->scn_phys.scn_state != DSS_SCANNING)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling return;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling if (ddp->ddp_phys_birth == 0 ||

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddp->ddp_phys_birth > scn->scn_phys.scn_cur_max_txg)

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling continue;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling ddt_bp_create(checksum, ddk, ddp, &bp);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scn->scn_visited_this_txg++;

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling scan_funcs[scn->scn_phys.scn_func](scn->scn_dp, &bp, &zb);

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling }

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling}

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Ling

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingstatic void

3f9d6ad73e45c6823b409f93b0c8d4f62861d2d5Lin Lingdsl_scan_visit(dsl_scan_t *scn, dmu_tx_t *tx)