diff options
Diffstat (limited to 'module/zfs/dsl_destroy.c')
| -rw-r--r-- | module/zfs/dsl_destroy.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/module/zfs/dsl_destroy.c b/module/zfs/dsl_destroy.c index d0fcacaed..e11508c90 100644 --- a/module/zfs/dsl_destroy.c +++ b/module/zfs/dsl_destroy.c @@ -209,6 +209,10 @@ dsl_dataset_remove_clones_key(dsl_dataset_t *ds, uint64_t mintxg, dmu_tx_t *tx) if (clone->ds_dir->dd_origin_txg > mintxg) { dsl_deadlist_remove_key(&clone->ds_deadlist, mintxg, tx); + if (dsl_dataset_remap_deadlist_exists(clone)) { + dsl_deadlist_remove_key( + &clone->ds_remap_deadlist, mintxg, tx); + } dsl_dataset_remove_clones_key(clone, mintxg, tx); } dsl_dataset_rele(clone, FTAG); @@ -219,6 +223,39 @@ dsl_dataset_remove_clones_key(dsl_dataset_t *ds, uint64_t mintxg, dmu_tx_t *tx) kmem_free(zc, sizeof (zap_cursor_t)); } +static void +dsl_destroy_snapshot_handle_remaps(dsl_dataset_t *ds, dsl_dataset_t *ds_next, + dmu_tx_t *tx) +{ + dsl_pool_t *dp = ds->ds_dir->dd_pool; + + /* Move blocks to be obsoleted to pool's obsolete list. */ + if (dsl_dataset_remap_deadlist_exists(ds_next)) { + if (!bpobj_is_open(&dp->dp_obsolete_bpobj)) + dsl_pool_create_obsolete_bpobj(dp, tx); + + dsl_deadlist_move_bpobj(&ds_next->ds_remap_deadlist, + &dp->dp_obsolete_bpobj, + dsl_dataset_phys(ds)->ds_prev_snap_txg, tx); + } + + /* Merge our deadlist into next's and free it. */ + if (dsl_dataset_remap_deadlist_exists(ds)) { + uint64_t remap_deadlist_object = + dsl_dataset_get_remap_deadlist_object(ds); + ASSERT(remap_deadlist_object != 0); + + mutex_enter(&ds_next->ds_remap_deadlist_lock); + if (!dsl_dataset_remap_deadlist_exists(ds_next)) + dsl_dataset_create_remap_deadlist(ds_next, tx); + mutex_exit(&ds_next->ds_remap_deadlist_lock); + + dsl_deadlist_merge(&ds_next->ds_remap_deadlist, + remap_deadlist_object, tx); + dsl_dataset_destroy_remap_deadlist(ds, tx); + } +} + void dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx) { @@ -333,11 +370,14 @@ dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx) dsl_deadlist_merge(&ds_next->ds_deadlist, dsl_dataset_phys(ds)->ds_deadlist_obj, tx); } + dsl_deadlist_close(&ds->ds_deadlist); dsl_deadlist_free(mos, dsl_dataset_phys(ds)->ds_deadlist_obj, tx); dmu_buf_will_dirty(ds->ds_dbuf, tx); dsl_dataset_phys(ds)->ds_deadlist_obj = 0; + dsl_destroy_snapshot_handle_remaps(ds, ds_next, tx); + /* Collapse range in clone heads */ dsl_dataset_remove_clones_key(ds, dsl_dataset_phys(ds)->ds_creation_txg, tx); @@ -371,6 +411,10 @@ dsl_destroy_snapshot_sync_impl(dsl_dataset_t *ds, boolean_t defer, dmu_tx_t *tx) dsl_dir_phys(ds->ds_dir)->dd_head_dataset_obj, FTAG, &hds)); dsl_deadlist_remove_key(&hds->ds_deadlist, dsl_dataset_phys(ds)->ds_creation_txg, tx); + if (dsl_dataset_remap_deadlist_exists(hds)) { + dsl_deadlist_remove_key(&hds->ds_remap_deadlist, + dsl_dataset_phys(ds)->ds_creation_txg, tx); + } dsl_dataset_rele(hds, FTAG); } else { @@ -826,14 +870,18 @@ dsl_destroy_head_sync_impl(dsl_dataset_t *ds, dmu_tx_t *tx) /* * Destroy the deadlist. Unless it's a clone, the - * deadlist should be empty. (If it's a clone, it's - * safe to ignore the deadlist contents.) + * deadlist should be empty since the dataset has no snapshots. + * (If it's a clone, it's safe to ignore the deadlist contents + * since they are still referenced by the origin snapshot.) */ dsl_deadlist_close(&ds->ds_deadlist); dsl_deadlist_free(mos, dsl_dataset_phys(ds)->ds_deadlist_obj, tx); dmu_buf_will_dirty(ds->ds_dbuf, tx); dsl_dataset_phys(ds)->ds_deadlist_obj = 0; + if (dsl_dataset_remap_deadlist_exists(ds)) + dsl_dataset_destroy_remap_deadlist(ds, tx); + objset_t *os; VERIFY0(dmu_objset_from_ds(ds, &os)); |