diff options
Diffstat (limited to 'module/zfs/dmu_send.c')
| -rw-r--r-- | module/zfs/dmu_send.c | 2829 |
1 files changed, 0 insertions, 2829 deletions
diff --git a/module/zfs/dmu_send.c b/module/zfs/dmu_send.c index 1f4d3a104..24f663d3f 100644 --- a/module/zfs/dmu_send.c +++ b/module/zfs/dmu_send.c @@ -62,13 +62,9 @@ /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ int zfs_send_corrupt_data = B_FALSE; int zfs_send_queue_length = SPA_MAXBLOCKSIZE; -int zfs_recv_queue_length = SPA_MAXBLOCKSIZE; /* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */ int zfs_send_set_freerecords_bit = B_TRUE; -static char *dmu_recv_tag = "dmu_recv_tag"; -const char *recv_clone_name = "%recv"; - /* * Use this to override the recordsize calculation for fast zfs send estimates. */ @@ -78,8 +74,6 @@ unsigned long zfs_override_estimate_recordsize = 0; (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \ (level) * (indblkshift - SPA_BLKPTRSHIFT))) -static void byteswap_record(dmu_replay_record_t *drr); - struct send_thread_arg { bqueue_t q; dsl_dataset_t *ds; /* Dataset to traverse */ @@ -1522,2826 +1516,6 @@ dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, return (err); } -typedef struct dmu_recv_begin_arg { - const char *drba_origin; - dmu_recv_cookie_t *drba_cookie; - cred_t *drba_cred; - dsl_crypto_params_t *drba_dcp; - uint64_t drba_snapobj; -} dmu_recv_begin_arg_t; - -static int -recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, - uint64_t fromguid, uint64_t featureflags) -{ - uint64_t val; - int error; - dsl_pool_t *dp = ds->ds_dir->dd_pool; - boolean_t encrypted = ds->ds_dir->dd_crypto_obj != 0; - boolean_t raw = (featureflags & DMU_BACKUP_FEATURE_RAW) != 0; - boolean_t embed = (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) != 0; - - /* temporary clone name must not exist */ - error = zap_lookup(dp->dp_meta_objset, - dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, - 8, 1, &val); - if (error != ENOENT) - return (error == 0 ? EBUSY : error); - - /* new snapshot name must not exist */ - error = zap_lookup(dp->dp_meta_objset, - dsl_dataset_phys(ds)->ds_snapnames_zapobj, - drba->drba_cookie->drc_tosnap, 8, 1, &val); - if (error != ENOENT) - return (error == 0 ? EEXIST : error); - - /* - * Check snapshot limit before receiving. We'll recheck again at the - * end, but might as well abort before receiving if we're already over - * the limit. - * - * Note that we do not check the file system limit with - * dsl_dir_fscount_check because the temporary %clones don't count - * against that limit. - */ - error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, - NULL, drba->drba_cred); - if (error != 0) - return (error); - - if (fromguid != 0) { - dsl_dataset_t *snap; - uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; - - /* Can't perform a raw receive on top of a non-raw receive */ - if (!encrypted && raw) - return (SET_ERROR(EINVAL)); - - /* Encryption is incompatible with embedded data */ - if (encrypted && embed) - return (SET_ERROR(EINVAL)); - - /* Find snapshot in this dir that matches fromguid. */ - while (obj != 0) { - error = dsl_dataset_hold_obj(dp, obj, FTAG, - &snap); - if (error != 0) - return (SET_ERROR(ENODEV)); - if (snap->ds_dir != ds->ds_dir) { - dsl_dataset_rele(snap, FTAG); - return (SET_ERROR(ENODEV)); - } - if (dsl_dataset_phys(snap)->ds_guid == fromguid) - break; - obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; - dsl_dataset_rele(snap, FTAG); - } - if (obj == 0) - return (SET_ERROR(ENODEV)); - - if (drba->drba_cookie->drc_force) { - drba->drba_snapobj = obj; - } else { - /* - * If we are not forcing, there must be no - * changes since fromsnap. - */ - if (dsl_dataset_modified_since_snap(ds, snap)) { - dsl_dataset_rele(snap, FTAG); - return (SET_ERROR(ETXTBSY)); - } - drba->drba_snapobj = ds->ds_prev->ds_object; - } - - dsl_dataset_rele(snap, FTAG); - } else { - /* if full, then must be forced */ - if (!drba->drba_cookie->drc_force) - return (SET_ERROR(EEXIST)); - - /* - * We don't support using zfs recv -F to blow away - * encrypted filesystems. This would require the - * dsl dir to point to the old encryption key and - * the new one at the same time during the receive. - */ - if ((!encrypted && raw) || encrypted) - return (SET_ERROR(EINVAL)); - - /* - * Perform the same encryption checks we would if - * we were creating a new dataset from scratch. - */ - if (!raw) { - boolean_t will_encrypt; - - error = dmu_objset_create_crypt_check( - ds->ds_dir->dd_parent, drba->drba_dcp, - &will_encrypt); - if (error != 0) - return (error); - - if (will_encrypt && embed) - return (SET_ERROR(EINVAL)); - } - - drba->drba_snapobj = 0; - } - - return (0); - -} - -static int -dmu_recv_begin_check(void *arg, dmu_tx_t *tx) -{ - dmu_recv_begin_arg_t *drba = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - struct drr_begin *drrb = drba->drba_cookie->drc_drrb; - uint64_t fromguid = drrb->drr_fromguid; - int flags = drrb->drr_flags; - ds_hold_flags_t dsflags = 0; - int error; - uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); - dsl_dataset_t *ds; - const char *tofs = drba->drba_cookie->drc_tofs; - - /* already checked */ - ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); - ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); - - if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == - DMU_COMPOUNDSTREAM || - drrb->drr_type >= DMU_OST_NUMTYPES || - ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) - return (SET_ERROR(EINVAL)); - - /* Verify pool version supports SA if SA_SPILL feature set */ - if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && - spa_version(dp->dp_spa) < SPA_VERSION_SA) - return (SET_ERROR(ENOTSUP)); - - if (drba->drba_cookie->drc_resumable && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) - return (SET_ERROR(ENOTSUP)); - - /* - * The receiving code doesn't know how to translate a WRITE_EMBEDDED - * record to a plain WRITE record, so the pool must have the - * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED - * records. Same with WRITE_EMBEDDED records that use LZ4 compression. - */ - if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) - return (SET_ERROR(ENOTSUP)); - if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) - return (SET_ERROR(ENOTSUP)); - - /* - * The receiving code doesn't know how to translate large blocks - * to smaller ones, so the pool must have the LARGE_BLOCKS - * feature enabled if the stream has LARGE_BLOCKS. Same with - * large dnodes. - */ - if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) - return (SET_ERROR(ENOTSUP)); - if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE)) - return (SET_ERROR(ENOTSUP)); - - if (featureflags & DMU_BACKUP_FEATURE_RAW) { - /* raw receives require the encryption feature */ - if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_ENCRYPTION)) - return (SET_ERROR(ENOTSUP)); - - /* embedded data is incompatible with encryption and raw recv */ - if (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) - return (SET_ERROR(EINVAL)); - } else { - dsflags |= DS_HOLD_FLAG_DECRYPT; - } - - error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); - if (error == 0) { - /* target fs already exists; recv into temp clone */ - - /* Can't recv a clone into an existing fs */ - if (flags & DRR_FLAG_CLONE || drba->drba_origin) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - - error = recv_begin_check_existing_impl(drba, ds, fromguid, - featureflags); - dsl_dataset_rele_flags(ds, dsflags, FTAG); - } else if (error == ENOENT) { - /* target fs does not exist; must be a full backup or clone */ - char buf[ZFS_MAX_DATASET_NAME_LEN]; - - /* - * If it's a non-clone incremental, we are missing the - * target fs, so fail the recv. - */ - if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || - drba->drba_origin)) - return (SET_ERROR(ENOENT)); - - /* - * If we're receiving a full send as a clone, and it doesn't - * contain all the necessary free records and freeobject - * records, reject it. - */ - if (fromguid == 0 && drba->drba_origin && - !(flags & DRR_FLAG_FREERECORDS)) - return (SET_ERROR(EINVAL)); - - /* Open the parent of tofs */ - ASSERT3U(strlen(tofs), <, sizeof (buf)); - (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); - error = dsl_dataset_hold_flags(dp, buf, dsflags, FTAG, &ds); - if (error != 0) - return (error); - - if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0 && - drba->drba_origin == NULL) { - boolean_t will_encrypt; - - /* - * Check that we aren't breaking any encryption rules - * and that we have all the parameters we need to - * create an encrypted dataset if necessary. If we are - * making an encrypted dataset the stream can't have - * embedded data. - */ - error = dmu_objset_create_crypt_check(ds->ds_dir, - drba->drba_dcp, &will_encrypt); - if (error != 0) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (error); - } - - if (will_encrypt && - (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - } - - /* - * Check filesystem and snapshot limits before receiving. We'll - * recheck snapshot limits again at the end (we create the - * filesystems and increment those counts during begin_sync). - */ - error = dsl_fs_ss_limit_check(ds->ds_dir, 1, - ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); - if (error != 0) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (error); - } - - error = dsl_fs_ss_limit_check(ds->ds_dir, 1, - ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); - if (error != 0) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (error); - } - - if (drba->drba_origin != NULL) { - dsl_dataset_t *origin; - - error = dsl_dataset_hold_flags(dp, drba->drba_origin, - dsflags, FTAG, &origin); - if (error != 0) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (error); - } - if (!origin->ds_is_snapshot) { - dsl_dataset_rele_flags(origin, dsflags, FTAG); - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - if (dsl_dataset_phys(origin)->ds_guid != fromguid && - fromguid != 0) { - dsl_dataset_rele_flags(origin, dsflags, FTAG); - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(ENODEV)); - } - if (origin->ds_dir->dd_crypto_obj != 0 && - (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) { - dsl_dataset_rele_flags(origin, dsflags, FTAG); - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - dsl_dataset_rele_flags(origin, - dsflags, FTAG); - } - dsl_dataset_rele_flags(ds, dsflags, FTAG); - error = 0; - } - return (error); -} - -static void -dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) -{ - dmu_recv_begin_arg_t *drba = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - objset_t *mos = dp->dp_meta_objset; - struct drr_begin *drrb = drba->drba_cookie->drc_drrb; - const char *tofs = drba->drba_cookie->drc_tofs; - uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); - dsl_dataset_t *ds, *newds; - objset_t *os; - uint64_t dsobj; - ds_hold_flags_t dsflags = 0; - int error; - uint64_t crflags = 0; - dsl_crypto_params_t dummy_dcp = { 0 }; - dsl_crypto_params_t *dcp = drba->drba_dcp; - - if (drrb->drr_flags & DRR_FLAG_CI_DATA) - crflags |= DS_FLAG_CI_DATASET; - - if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0) - dsflags |= DS_HOLD_FLAG_DECRYPT; - - /* - * Raw, non-incremental recvs always use a dummy dcp with - * the raw cmd set. Raw incremental recvs do not use a dcp - * since the encryption parameters are already set in stone. - */ - if (dcp == NULL && drba->drba_snapobj == 0 && - drba->drba_origin == NULL) { - ASSERT3P(dcp, ==, NULL); - dcp = &dummy_dcp; - - if (featureflags & DMU_BACKUP_FEATURE_RAW) - dcp->cp_cmd = DCP_CMD_RAW_RECV; - } - - error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); - if (error == 0) { - /* create temporary clone */ - dsl_dataset_t *snap = NULL; - - if (drba->drba_snapobj != 0) { - VERIFY0(dsl_dataset_hold_obj(dp, - drba->drba_snapobj, FTAG, &snap)); - ASSERT3P(dcp, ==, NULL); - } - - dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, - snap, crflags, drba->drba_cred, dcp, tx); - if (drba->drba_snapobj != 0) - dsl_dataset_rele(snap, FTAG); - dsl_dataset_rele_flags(ds, dsflags, FTAG); - } else { - dsl_dir_t *dd; - const char *tail; - dsl_dataset_t *origin = NULL; - - VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); - - if (drba->drba_origin != NULL) { - VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, - FTAG, &origin)); - ASSERT3P(dcp, ==, NULL); - } - - /* Create new dataset. */ - dsobj = dsl_dataset_create_sync(dd, strrchr(tofs, '/') + 1, - origin, crflags, drba->drba_cred, dcp, tx); - if (origin != NULL) - dsl_dataset_rele(origin, FTAG); - dsl_dir_rele(dd, FTAG); - drba->drba_cookie->drc_newfs = B_TRUE; - } - - VERIFY0(dsl_dataset_own_obj(dp, dsobj, dsflags, dmu_recv_tag, &newds)); - VERIFY0(dmu_objset_from_ds(newds, &os)); - - if (drba->drba_cookie->drc_resumable) { - dsl_dataset_zapify(newds, tx); - if (drrb->drr_fromguid != 0) { - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, - 8, 1, &drrb->drr_fromguid, tx)); - } - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, - 8, 1, &drrb->drr_toguid, tx)); - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, - 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); - uint64_t one = 1; - uint64_t zero = 0; - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, - 8, 1, &one, tx)); - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, - 8, 1, &zero, tx)); - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, - 8, 1, &zero, tx)); - if (featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) { - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_LARGEBLOCK, - 8, 1, &one, tx)); - } - if (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) { - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, - 8, 1, &one, tx)); - } - if (featureflags & DMU_BACKUP_FEATURE_COMPRESSED) { - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_COMPRESSOK, - 8, 1, &one, tx)); - } - if (featureflags & DMU_BACKUP_FEATURE_RAW) { - VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_RAWOK, - 8, 1, &one, tx)); - } - } - - /* - * Usually the os->os_encrypted value is tied to the presence of a - * DSL Crypto Key object in the dd. However, that will not be received - * until dmu_recv_stream(), so we set the value manually for now. - */ - if (featureflags & DMU_BACKUP_FEATURE_RAW) { - os->os_encrypted = B_TRUE; - drba->drba_cookie->drc_raw = B_TRUE; - } - - dmu_buf_will_dirty(newds->ds_dbuf, tx); - dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; - - /* - * If we actually created a non-clone, we need to create the objset - * in our new dataset. If this is a raw send we postpone this until - * dmu_recv_stream() so that we can allocate the metadnode with the - * properties from the DRR_BEGIN payload. - */ - rrw_enter(&newds->ds_bp_rwlock, RW_READER, FTAG); - if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds)) && - (featureflags & DMU_BACKUP_FEATURE_RAW) == 0) { - (void) dmu_objset_create_impl(dp->dp_spa, - newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); - } - rrw_exit(&newds->ds_bp_rwlock, FTAG); - - drba->drba_cookie->drc_ds = newds; - - spa_history_log_internal_ds(newds, "receive", tx, ""); -} - -static int -dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) -{ - dmu_recv_begin_arg_t *drba = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - struct drr_begin *drrb = drba->drba_cookie->drc_drrb; - int error; - ds_hold_flags_t dsflags = 0; - uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); - dsl_dataset_t *ds; - const char *tofs = drba->drba_cookie->drc_tofs; - - /* already checked */ - ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); - ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING); - - if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == - DMU_COMPOUNDSTREAM || - drrb->drr_type >= DMU_OST_NUMTYPES) - return (SET_ERROR(EINVAL)); - - /* Verify pool version supports SA if SA_SPILL feature set */ - if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && - spa_version(dp->dp_spa) < SPA_VERSION_SA) - return (SET_ERROR(ENOTSUP)); - - /* - * The receiving code doesn't know how to translate a WRITE_EMBEDDED - * record to a plain WRITE record, so the pool must have the - * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED - * records. Same with WRITE_EMBEDDED records that use LZ4 compression. - */ - if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) - return (SET_ERROR(ENOTSUP)); - if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) - return (SET_ERROR(ENOTSUP)); - - /* - * The receiving code doesn't know how to translate large blocks - * to smaller ones, so the pool must have the LARGE_BLOCKS - * feature enabled if the stream has LARGE_BLOCKS. Same with - * large dnodes. - */ - if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) - return (SET_ERROR(ENOTSUP)); - if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) && - !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE)) - return (SET_ERROR(ENOTSUP)); - - /* 6 extra bytes for /%recv */ - char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; - (void) snprintf(recvname, sizeof (recvname), "%s/%s", - tofs, recv_clone_name); - - if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0) - dsflags |= DS_HOLD_FLAG_DECRYPT; - - if (dsl_dataset_hold_flags(dp, recvname, dsflags, FTAG, &ds) != 0) { - /* %recv does not exist; continue in tofs */ - error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); - if (error != 0) - return (error); - } - - /* check that ds is marked inconsistent */ - if (!DS_IS_INCONSISTENT(ds)) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - - /* check that there is resuming data, and that the toguid matches */ - if (!dsl_dataset_is_zapified(ds)) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - uint64_t val; - error = zap_lookup(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); - if (error != 0 || drrb->drr_toguid != val) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - - /* - * Check if the receive is still running. If so, it will be owned. - * Note that nothing else can own the dataset (e.g. after the receive - * fails) because it will be marked inconsistent. - */ - if (dsl_dataset_has_owner(ds)) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EBUSY)); - } - - /* There should not be any snapshots of this fs yet. */ - if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - - /* - * Note: resume point will be checked when we process the first WRITE - * record. - */ - - /* check that the origin matches */ - val = 0; - (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); - if (drrb->drr_fromguid != val) { - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (SET_ERROR(EINVAL)); - } - - dsl_dataset_rele_flags(ds, dsflags, FTAG); - return (0); -} - -static void -dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) -{ - dmu_recv_begin_arg_t *drba = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - const char *tofs = drba->drba_cookie->drc_tofs; - struct drr_begin *drrb = drba->drba_cookie->drc_drrb; - uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); - dsl_dataset_t *ds; - objset_t *os; - ds_hold_flags_t dsflags = 0; - uint64_t dsobj; - /* 6 extra bytes for /%recv */ - char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; - - (void) snprintf(recvname, sizeof (recvname), "%s/%s", - tofs, recv_clone_name); - - if (featureflags & DMU_BACKUP_FEATURE_RAW) { - drba->drba_cookie->drc_raw = B_TRUE; - } else { - dsflags |= DS_HOLD_FLAG_DECRYPT; - } - - if (dsl_dataset_hold_flags(dp, recvname, dsflags, FTAG, &ds) != 0) { - /* %recv does not exist; continue in tofs */ - VERIFY0(dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds)); - drba->drba_cookie->drc_newfs = B_TRUE; - } - - /* clear the inconsistent flag so that we can own it */ - ASSERT(DS_IS_INCONSISTENT(ds)); - dmu_buf_will_dirty(ds->ds_dbuf, tx); - dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; - dsobj = ds->ds_object; - dsl_dataset_rele_flags(ds, dsflags, FTAG); - - VERIFY0(dsl_dataset_own_obj(dp, dsobj, dsflags, dmu_recv_tag, &ds)); - VERIFY0(dmu_objset_from_ds(ds, &os)); - - dmu_buf_will_dirty(ds->ds_dbuf, tx); - dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; - - rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); - ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds)) || - drba->drba_cookie->drc_raw); - rrw_exit(&ds->ds_bp_rwlock, FTAG); - - drba->drba_cookie->drc_ds = ds; - - spa_history_log_internal_ds(ds, "resume receive", tx, ""); -} - -/* - * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() - * succeeds; otherwise we will leak the holds on the datasets. - */ -int -dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, - boolean_t force, boolean_t resumable, nvlist_t *localprops, - nvlist_t *hidden_args, char *origin, dmu_recv_cookie_t *drc) -{ - dmu_recv_begin_arg_t drba = { 0 }; - - bzero(drc, sizeof (dmu_recv_cookie_t)); - drc->drc_drr_begin = drr_begin; - drc->drc_drrb = &drr_begin->drr_u.drr_begin; - drc->drc_tosnap = tosnap; - drc->drc_tofs = tofs; - drc->drc_force = force; - drc->drc_resumable = resumable; - drc->drc_cred = CRED(); - drc->drc_clone = (origin != NULL); - - if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { - drc->drc_byteswap = B_TRUE; - (void) fletcher_4_incremental_byteswap(drr_begin, - sizeof (dmu_replay_record_t), &drc->drc_cksum); - byteswap_record(drr_begin); - } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { - (void) fletcher_4_incremental_native(drr_begin, - sizeof (dmu_replay_record_t), &drc->drc_cksum); - } else { - return (SET_ERROR(EINVAL)); - } - - drba.drba_origin = origin; - drba.drba_cookie = drc; - drba.drba_cred = CRED(); - - if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & - DMU_BACKUP_FEATURE_RESUMING) { - return (dsl_sync_task(tofs, - dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, - &drba, 5, ZFS_SPACE_CHECK_NORMAL)); - } else { - int err; - - /* - * For non-raw, non-incremental, non-resuming receives the - * user can specify encryption parameters on the command line - * with "zfs recv -o". For these receives we create a dcp and - * pass it to the sync task. Creating the dcp will implicitly - * remove the encryption params from the localprops nvlist, - * which avoids errors when trying to set these normally - * read-only properties. Any other kind of receive that - * attempts to set these properties will fail as a result. - */ - if ((DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & - DMU_BACKUP_FEATURE_RAW) == 0 && - origin == NULL && drc->drc_drrb->drr_fromguid == 0) { - err = dsl_crypto_params_create_nvlist(DCP_CMD_NONE, - localprops, hidden_args, &drba.drba_dcp); - if (err != 0) - return (err); - } - - err = dsl_sync_task(tofs, - dmu_recv_begin_check, dmu_recv_begin_sync, - &drba, 5, ZFS_SPACE_CHECK_NORMAL); - dsl_crypto_params_free(drba.drba_dcp, !!err); - - return (err); - } -} - -struct receive_record_arg { - dmu_replay_record_t header; - void *payload; /* Pointer to a buffer containing the payload */ - /* - * If the record is a write, pointer to the arc_buf_t containing the - * payload. - */ - arc_buf_t *arc_buf; - int payload_size; - uint64_t bytes_read; /* bytes read from stream when record created */ - boolean_t eos_marker; /* Marks the end of the stream */ - bqueue_node_t node; -}; - -struct receive_writer_arg { - objset_t *os; - boolean_t byteswap; - bqueue_t q; - - /* - * These three args are used to signal to the main thread that we're - * done. - */ - kmutex_t mutex; - kcondvar_t cv; - boolean_t done; - - int err; - /* A map from guid to dataset to help handle dedup'd streams. */ - avl_tree_t *guid_to_ds_map; - boolean_t resumable; - boolean_t raw; - uint64_t last_object; - uint64_t last_offset; - uint64_t max_object; /* highest object ID referenced in stream */ - uint64_t bytes_read; /* bytes read when current record created */ - - /* Encryption parameters for the last received DRR_OBJECT_RANGE */ - boolean_t or_crypt_params_present; - uint64_t or_firstobj; - uint64_t or_numslots; - uint8_t or_salt[ZIO_DATA_SALT_LEN]; - uint8_t or_iv[ZIO_DATA_IV_LEN]; - uint8_t or_mac[ZIO_DATA_MAC_LEN]; - boolean_t or_byteorder; -}; - -struct objlist { - list_t list; /* List of struct receive_objnode. */ - /* - * Last object looked up. Used to assert that objects are being looked - * up in ascending order. - */ - uint64_t last_lookup; -}; - -struct receive_objnode { - list_node_t node; - uint64_t object; -}; - -struct receive_arg { - objset_t *os; - vnode_t *vp; /* The vnode to read the stream from */ - uint64_t voff; /* The current offset in the stream */ - uint64_t bytes_read; - /* - * A record that has had its payload read in, but hasn't yet been handed - * off to the worker thread. - */ - struct receive_record_arg *rrd; - /* A record that has had its header read in, but not its payload. */ - struct receive_record_arg *next_rrd; - zio_cksum_t cksum; - zio_cksum_t prev_cksum; - int err; - boolean_t byteswap; - boolean_t raw; - uint64_t featureflags; - /* Sorted list of objects not to issue prefetches for. */ - struct objlist ignore_objlist; -}; - -typedef struct guid_map_entry { - uint64_t guid; - boolean_t raw; - dsl_dataset_t *gme_ds; - avl_node_t avlnode; -} guid_map_entry_t; - -static int -guid_compare(const void *arg1, const void *arg2) -{ - const guid_map_entry_t *gmep1 = (const guid_map_entry_t *)arg1; - const guid_map_entry_t *gmep2 = (const guid_map_entry_t *)arg2; - - return (AVL_CMP(gmep1->guid, gmep2->guid)); -} - -static void -free_guid_map_onexit(void *arg) -{ - avl_tree_t *ca = arg; - void *cookie = NULL; - guid_map_entry_t *gmep; - - while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { - ds_hold_flags_t dsflags = DS_HOLD_FLAG_DECRYPT; - - if (gmep->raw) { - gmep->gme_ds->ds_objset->os_raw_receive = B_FALSE; - dsflags &= ~DS_HOLD_FLAG_DECRYPT; - } - - dsl_dataset_disown(gmep->gme_ds, dsflags, gmep); - kmem_free(gmep, sizeof (guid_map_entry_t)); - } - avl_destroy(ca); - kmem_free(ca, sizeof (avl_tree_t)); -} - -static int -receive_read(struct receive_arg *ra, int len, void *buf) -{ - int done = 0; - - /* - * The code doesn't rely on this (lengths being multiples of 8). See - * comment in dump_bytes. - */ - ASSERT(len % 8 == 0 || - (ra->featureflags & DMU_BACKUP_FEATURE_RAW) != 0); - - while (done < len) { - ssize_t resid; - - ra->err = vn_rdwr(UIO_READ, ra->vp, - (char *)buf + done, len - done, - ra->voff, UIO_SYSSPACE, FAPPEND, - RLIM64_INFINITY, CRED(), &resid); - - if (resid == len - done) { - /* - * Note: ECKSUM indicates that the receive - * was interrupted and can potentially be resumed. - */ - ra->err = SET_ERROR(ECKSUM); - } - ra->voff += len - done - resid; - done = len - resid; - if (ra->err != 0) - return (ra->err); - } - - ra->bytes_read += len; - - ASSERT3U(done, ==, len); - return (0); -} - -noinline static void -byteswap_record(dmu_replay_record_t *drr) -{ -#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) -#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) - drr->drr_type = BSWAP_32(drr->drr_type); - drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); - - switch (drr->drr_type) { - case DRR_BEGIN: - DO64(drr_begin.drr_magic); - DO64(drr_begin.drr_versioninfo); - DO64(drr_begin.drr_creation_time); - DO32(drr_begin.drr_type); - DO32(drr_begin.drr_flags); - DO64(drr_begin.drr_toguid); - DO64(drr_begin.drr_fromguid); - break; - case DRR_OBJECT: - DO64(drr_object.drr_object); - DO32(drr_object.drr_type); - DO32(drr_object.drr_bonustype); - DO32(drr_object.drr_blksz); - DO32(drr_object.drr_bonuslen); - DO32(drr_object.drr_raw_bonuslen); - DO64(drr_object.drr_toguid); - DO64(drr_object.drr_maxblkid); - break; - case DRR_FREEOBJECTS: - DO64(drr_freeobjects.drr_firstobj); - DO64(drr_freeobjects.drr_numobjs); - DO64(drr_freeobjects.drr_toguid); - break; - case DRR_WRITE: - DO64(drr_write.drr_object); - DO32(drr_write.drr_type); - DO64(drr_write.drr_offset); - DO64(drr_write.drr_logical_size); - DO64(drr_write.drr_toguid); - ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); - DO64(drr_write.drr_key.ddk_prop); - DO64(drr_write.drr_compressed_size); - break; - case DRR_WRITE_BYREF: - DO64(drr_write_byref.drr_object); - DO64(drr_write_byref.drr_offset); - DO64(drr_write_byref.drr_length); - DO64(drr_write_byref.drr_toguid); - DO64(drr_write_byref.drr_refguid); - DO64(drr_write_byref.drr_refobject); - DO64(drr_write_byref.drr_refoffset); - ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. - drr_key.ddk_cksum); - DO64(drr_write_byref.drr_key.ddk_prop); - break; - case DRR_WRITE_EMBEDDED: - DO64(drr_write_embedded.drr_object); - DO64(drr_write_embedded.drr_offset); - DO64(drr_write_embedded.drr_length); - DO64(drr_write_embedded.drr_toguid); - DO32(drr_write_embedded.drr_lsize); - DO32(drr_write_embedded.drr_psize); - break; - case DRR_FREE: - DO64(drr_free.drr_object); - DO64(drr_free.drr_offset); - DO64(drr_free.drr_length); - DO64(drr_free.drr_toguid); - break; - case DRR_SPILL: - DO64(drr_spill.drr_object); - DO64(drr_spill.drr_length); - DO64(drr_spill.drr_toguid); - DO64(drr_spill.drr_compressed_size); - DO32(drr_spill.drr_type); - break; - case DRR_OBJECT_RANGE: - DO64(drr_object_range.drr_firstobj); - DO64(drr_object_range.drr_numslots); - DO64(drr_object_range.drr_toguid); - break; - case DRR_END: - DO64(drr_end.drr_toguid); - ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); - break; - default: - break; - } - - if (drr->drr_type != DRR_BEGIN) { - ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); - } - -#undef DO64 -#undef DO32 -} - -static inline uint8_t -deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) -{ - if (bonus_type == DMU_OT_SA) { - return (1); - } else { - return (1 + - ((DN_OLD_MAX_BONUSLEN - - MIN(DN_OLD_MAX_BONUSLEN, bonus_size)) >> SPA_BLKPTRSHIFT)); - } -} - -static void -save_resume_state(struct receive_writer_arg *rwa, - uint64_t object, uint64_t offset, dmu_tx_t *tx) -{ - int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; - - if (!rwa->resumable) - return; - - /* - * We use ds_resume_bytes[] != 0 to indicate that we need to - * update this on disk, so it must not be 0. - */ - ASSERT(rwa->bytes_read != 0); - - /* - * We only resume from write records, which have a valid - * (non-meta-dnode) object number. - */ - ASSERT(object != 0); - - /* - * For resuming to work correctly, we must receive records in order, - * sorted by object,offset. This is checked by the callers, but - * assert it here for good measure. - */ - ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); - ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || - offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); - ASSERT3U(rwa->bytes_read, >=, - rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); - - rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; - rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; - rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; -} - -noinline static int -receive_object(struct receive_writer_arg *rwa, struct drr_object *drro, - void *data) -{ - dmu_object_info_t doi; - dmu_tx_t *tx; - uint64_t object; - int err; - uint8_t dn_slots = drro->drr_dn_slots != 0 ? - drro->drr_dn_slots : DNODE_MIN_SLOTS; - - if (drro->drr_type == DMU_OT_NONE || - !DMU_OT_IS_VALID(drro->drr_type) || - !DMU_OT_IS_VALID(drro->drr_bonustype) || - drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || - drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || - P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || - drro->drr_blksz < SPA_MINBLOCKSIZE || - drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || - drro->drr_bonuslen > - DN_BONUS_SIZE(spa_maxdnodesize(dmu_objset_spa(rwa->os))) || - dn_slots > - (spa_maxdnodesize(dmu_objset_spa(rwa->os)) >> DNODE_SHIFT)) { - return (SET_ERROR(EINVAL)); - } - - if (rwa->raw) { - /* - * We should have received a DRR_OBJECT_RANGE record - * containing this block and stored it in rwa. - */ - if (drro->drr_object < rwa->or_firstobj || - drro->drr_object >= rwa->or_firstobj + rwa->or_numslots || - drro->drr_raw_bonuslen < drro->drr_bonuslen || - drro->drr_indblkshift > SPA_MAXBLOCKSHIFT || - drro->drr_nlevels > DN_MAX_LEVELS || - drro->drr_nblkptr > DN_MAX_NBLKPTR || - DN_SLOTS_TO_BONUSLEN(dn_slots) < - drro->drr_raw_bonuslen) - return (SET_ERROR(EINVAL)); - } else { - if (drro->drr_flags != 0 || drro->drr_raw_bonuslen != 0 || - drro->drr_indblkshift != 0 || drro->drr_nlevels != 0 || - drro->drr_nblkptr != 0) - return (SET_ERROR(EINVAL)); - } - - err = dmu_object_info(rwa->os, drro->drr_object, &doi); - if (err != 0 && err != ENOENT && err != EEXIST) - return (SET_ERROR(EINVAL)); - - if (drro->drr_object > rwa->max_object) - rwa->max_object = drro->drr_object; - - /* - * If we are losing blkptrs or changing the block size this must - * be a new file instance. We must clear out the previous file - * contents before we can change this type of metadata in the dnode. - * Raw receives will also check that the indirect structure of the - * dnode hasn't changed. - */ - if (err == 0) { - uint32_t indblksz = drro->drr_indblkshift ? - 1ULL << drro->drr_indblkshift : 0; - int nblkptr = deduce_nblkptr(drro->drr_bonustype, - drro->drr_bonuslen); - - object = drro->drr_object; - - /* nblkptr will be bounded by the bonus size and type */ - if (rwa->raw && nblkptr != drro->drr_nblkptr) - return (SET_ERROR(EINVAL)); - - if (drro->drr_blksz != doi.doi_data_block_size || - nblkptr < doi.doi_nblkptr || - dn_slots != doi.doi_dnodesize >> DNODE_SHIFT || - (rwa->raw && - (indblksz != doi.doi_metadata_block_size || - drro->drr_nlevels < doi.doi_indirection))) { - err = dmu_free_long_range(rwa->os, - drro->drr_object, 0, DMU_OBJECT_END); - if (err != 0) - return (SET_ERROR(EINVAL)); - } - - /* - * The dmu does not currently support decreasing nlevels - * on an object. For non-raw sends, this does not matter - * and the new object can just use the previous one's nlevels. - * For raw sends, however, the structure of the received dnode - * (including nlevels) must match that of the send side. - * Therefore, instead of using dmu_object_reclaim(), we must - * free the object completely and call dmu_object_claim_dnsize() - * instead. - */ - if ((rwa->raw && drro->drr_nlevels < doi.doi_indirection) || - dn_slots != doi.doi_dnodesize >> DNODE_SHIFT) { - err = dmu_free_long_object(rwa->os, drro->drr_object); - if (err != 0) - return (SET_ERROR(EINVAL)); - - txg_wait_synced(dmu_objset_pool(rwa->os), 0); - object = DMU_NEW_OBJECT; - } - } else if (err == EEXIST) { - /* - * The object requested is currently an interior slot of a - * multi-slot dnode. This will be resolved when the next txg - * is synced out, since the send stream will have told us - * to free this slot when we freed the associated dnode - * earlier in the stream. - */ - txg_wait_synced(dmu_objset_pool(rwa->os), 0); - object = drro->drr_object; - } else { - /* object is free and we are about to allocate a new one */ - object = DMU_NEW_OBJECT; - } - - /* - * If this is a multi-slot dnode there is a chance that this - * object will expand into a slot that is already used by - * another object from the previous snapshot. We must free - * these objects before we attempt to allocate the new dnode. - */ - if (dn_slots > 1) { - boolean_t need_sync = B_FALSE; - - for (uint64_t slot = drro->drr_object + 1; - slot < drro->drr_object + dn_slots; - slot++) { - dmu_object_info_t slot_doi; - - err = dmu_object_info(rwa->os, slot, &slot_doi); - if (err == ENOENT || err == EEXIST) - continue; - else if (err != 0) - return (err); - - err = dmu_free_long_object(rwa->os, slot); - - if (err != 0) - return (err); - - need_sync = B_TRUE; - } - - if (need_sync) - txg_wait_synced(dmu_objset_pool(rwa->os), 0); - } - - tx = dmu_tx_create(rwa->os); - dmu_tx_hold_bonus(tx, object); - dmu_tx_hold_write(tx, object, 0, 0); - err = dmu_tx_assign(tx, TXG_WAIT); - if (err != 0) { - dmu_tx_abort(tx); - return (err); - } - - if (object == DMU_NEW_OBJECT) { - /* currently free, want to be allocated */ - err = dmu_object_claim_dnsize(rwa->os, drro->drr_object, - drro->drr_type, drro->drr_blksz, - drro->drr_bonustype, drro->drr_bonuslen, - dn_slots << DNODE_SHIFT, tx); - } else if (drro->drr_type != doi.doi_type || - drro->drr_blksz != doi.doi_data_block_size || - drro->drr_bonustype != doi.doi_bonus_type || - drro->drr_bonuslen != doi.doi_bonus_size) { - /* currently allocated, but with different properties */ - err = dmu_object_reclaim_dnsize(rwa->os, drro->drr_object, - drro->drr_type, drro->drr_blksz, - drro->drr_bonustype, drro->drr_bonuslen, - dn_slots << DNODE_SHIFT, tx); - } - if (err != 0) { - dmu_tx_commit(tx); - return (SET_ERROR(EINVAL)); - } - - if (rwa->or_crypt_params_present) { - /* - * Set the crypt params for the buffer associated with this - * range of dnodes. This causes the blkptr_t to have the - * same crypt params (byteorder, salt, iv, mac) as on the - * sending side. - * - * Since we are committing this tx now, it is possible for - * the dnode block to end up on-disk with the incorrect MAC, - * if subsequent objects in this block are received in a - * different txg. However, since the dataset is marked as - * inconsistent, no code paths will do a non-raw read (or - * decrypt the block / verify the MAC). The receive code and - * scrub code can safely do raw reads and verify the - * checksum. They don't need to verify the MAC. - */ - dmu_buf_t *db = NULL; - uint64_t offset = rwa->or_firstobj * DNODE_MIN_SIZE; - - err = dmu_buf_hold_by_dnode(DMU_META_DNODE(rwa->os), - offset, FTAG, &db, DMU_READ_PREFETCH | DMU_READ_NO_DECRYPT); - if (err != 0) { - dmu_tx_commit(tx); - return (SET_ERROR(EINVAL)); - } - - dmu_buf_set_crypt_params(db, rwa->or_byteorder, - rwa->or_salt, rwa->or_iv, rwa->or_mac, tx); - - dmu_buf_rele(db, FTAG); - - rwa->or_crypt_params_present = B_FALSE; - } - - dmu_object_set_checksum(rwa->os, drro->drr_object, - drro->drr_checksumtype, tx); - dmu_object_set_compress(rwa->os, drro->drr_object, - drro->drr_compress, tx); - - /* handle more restrictive dnode structuring for raw recvs */ - if (rwa->raw) { - /* - * Set the indirect block shift and nlevels. This will not fail - * because we ensured all of the blocks were free earlier if - * this is a new object. - */ - VERIFY0(dmu_object_set_blocksize(rwa->os, drro->drr_object, - drro->drr_blksz, drro->drr_indblkshift, tx)); - VERIFY0(dmu_object_set_nlevels(rwa->os, drro->drr_object, - drro->drr_nlevels, tx)); - VERIFY0(dmu_object_set_maxblkid(rwa->os, drro->drr_object, - drro->drr_maxblkid, tx)); - } - - if (data != NULL) { - dmu_buf_t *db; - uint32_t flags = DMU_READ_NO_PREFETCH; - - if (rwa->raw) - flags |= DMU_READ_NO_DECRYPT; - - VERIFY0(dmu_bonus_hold_impl(rwa->os, drro->drr_object, - FTAG, flags, &db)); - dmu_buf_will_dirty(db, tx); - - ASSERT3U(db->db_size, >=, drro->drr_bonuslen); - bcopy(data, db->db_data, DRR_OBJECT_PAYLOAD_SIZE(drro)); - - /* - * Raw bonus buffers have their byteorder determined by the - * DRR_OBJECT_RANGE record. - */ - if (rwa->byteswap && !rwa->raw) { - dmu_object_byteswap_t byteswap = - DMU_OT_BYTESWAP(drro->drr_bonustype); - dmu_ot_byteswap[byteswap].ob_func(db->db_data, - DRR_OBJECT_PAYLOAD_SIZE(drro)); - } - dmu_buf_rele(db, FTAG); - } - dmu_tx_commit(tx); - - return (0); -} - -/* ARGSUSED */ -noinline static int -receive_freeobjects(struct receive_writer_arg *rwa, - struct drr_freeobjects *drrfo) -{ - uint64_t obj; - int next_err = 0; - - if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) - return (SET_ERROR(EINVAL)); - - for (obj = drrfo->drr_firstobj == 0 ? 1 : drrfo->drr_firstobj; - obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0; - next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { - dmu_object_info_t doi; - int err; - - err = dmu_object_info(rwa->os, obj, &doi); - if (err == ENOENT) - continue; - else if (err != 0) - return (err); - - err = dmu_free_long_object(rwa->os, obj); - - if (err != 0) - return (err); - - if (obj > rwa->max_object) - rwa->max_object = obj; - } - if (next_err != ESRCH) - return (next_err); - return (0); -} - -noinline static int -receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, - arc_buf_t *abuf) -{ - int err; - dmu_tx_t *tx; - dnode_t *dn; - - if (drrw->drr_offset + drrw->drr_logical_size < drrw->drr_offset || - !DMU_OT_IS_VALID(drrw->drr_type)) - return (SET_ERROR(EINVAL)); - - /* - * For resuming to work, records must be in increasing order - * by (object, offset). - */ - if (drrw->drr_object < rwa->last_object || - (drrw->drr_object == rwa->last_object && - drrw->drr_offset < rwa->last_offset)) { - return (SET_ERROR(EINVAL)); - } - rwa->last_object = drrw->drr_object; - rwa->last_offset = drrw->drr_offset; - - if (rwa->last_object > rwa->max_object) - rwa->max_object = rwa->last_object; - - if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) - return (SET_ERROR(EINVAL)); - - tx = dmu_tx_create(rwa->os); - dmu_tx_hold_write(tx, drrw->drr_object, - drrw->drr_offset, drrw->drr_logical_size); - err = dmu_tx_assign(tx, TXG_WAIT); - if (err != 0) { - dmu_tx_abort(tx); - return (err); - } - - if (rwa->byteswap && !arc_is_encrypted(abuf) && - arc_get_compression(abuf) == ZIO_COMPRESS_OFF) { - dmu_object_byteswap_t byteswap = - DMU_OT_BYTESWAP(drrw->drr_type); - dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, - DRR_WRITE_PAYLOAD_SIZE(drrw)); - } - - VERIFY0(dnode_hold(rwa->os, drrw->drr_object, FTAG, &dn)); - dmu_assign_arcbuf_by_dnode(dn, drrw->drr_offset, abuf, tx); - dnode_rele(dn, FTAG); - - /* - * Note: If the receive fails, we want the resume stream to start - * with the same record that we last successfully received (as opposed - * to the next record), so that we can verify that we are - * resuming from the correct location. - */ - save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); - dmu_tx_commit(tx); - - return (0); -} - -/* - * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed - * streams to refer to a copy of the data that is already on the - * system because it came in earlier in the stream. This function - * finds the earlier copy of the data, and uses that copy instead of - * data from the stream to fulfill this write. - */ -static int -receive_write_byref(struct receive_writer_arg *rwa, - struct drr_write_byref *drrwbr) -{ - dmu_tx_t *tx; - int err; - guid_map_entry_t gmesrch; - guid_map_entry_t *gmep; - avl_index_t where; - objset_t *ref_os = NULL; - int flags = DMU_READ_PREFETCH; - dmu_buf_t *dbp; - - if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) - return (SET_ERROR(EINVAL)); - - /* - * If the GUID of the referenced dataset is different from the - * GUID of the target dataset, find the referenced dataset. - */ - if (drrwbr->drr_toguid != drrwbr->drr_refguid) { - gmesrch.guid = drrwbr->drr_refguid; - if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, - &where)) == NULL) { - return (SET_ERROR(EINVAL)); - } - if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) - return (SET_ERROR(EINVAL)); - } else { - ref_os = rwa->os; - } - - if (drrwbr->drr_object > rwa->max_object) - rwa->max_object = drrwbr->drr_object; - - if (rwa->raw) - flags |= DMU_READ_NO_DECRYPT; - - /* may return either a regular db or an encrypted one */ - err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, - drrwbr->drr_refoffset, FTAG, &dbp, flags); - if (err != 0) - return (err); - - tx = dmu_tx_create(rwa->os); - - dmu_tx_hold_write(tx, drrwbr->drr_object, - drrwbr->drr_offset, drrwbr->drr_length); - err = dmu_tx_assign(tx, TXG_WAIT); - if (err != 0) { - dmu_tx_abort(tx); - return (err); - } - - if (rwa->raw) { - dmu_copy_from_buf(rwa->os, drrwbr->drr_object, - drrwbr->drr_offset, dbp, tx); - } else { - dmu_write(rwa->os, drrwbr->drr_object, - drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); - } - dmu_buf_rele(dbp, FTAG); - - /* See comment in restore_write. */ - save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx); - dmu_tx_commit(tx); - return (0); -} - -static int -receive_write_embedded(struct receive_writer_arg *rwa, - struct drr_write_embedded *drrwe, void *data) -{ - dmu_tx_t *tx; - int err; - - if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) - return (SET_ERROR(EINVAL)); - - if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) - return (SET_ERROR(EINVAL)); - - if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) - return (SET_ERROR(EINVAL)); - if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) - return (SET_ERROR(EINVAL)); - if (rwa->raw) - return (SET_ERROR(EINVAL)); - - if (drrwe->drr_object > rwa->max_object) - rwa->max_object = drrwe->drr_object; - - tx = dmu_tx_create(rwa->os); - - dmu_tx_hold_write(tx, drrwe->drr_object, - drrwe->drr_offset, drrwe->drr_length); - err = dmu_tx_assign(tx, TXG_WAIT); - if (err != 0) { - dmu_tx_abort(tx); - return (err); - } - - dmu_write_embedded(rwa->os, drrwe->drr_object, - drrwe->drr_offset, data, drrwe->drr_etype, - drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, - rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); - - /* See comment in restore_write. */ - save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); - dmu_tx_commit(tx); - return (0); -} - -static int -receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, - arc_buf_t *abuf) -{ - dmu_tx_t *tx; - dmu_buf_t *db, *db_spill; - int err; - uint32_t flags = 0; - - if (drrs->drr_length < SPA_MINBLOCKSIZE || - drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) - return (SET_ERROR(EINVAL)); - - if (rwa->raw) { - if (!DMU_OT_IS_VALID(drrs->drr_type) || - drrs->drr_compressiontype >= ZIO_COMPRESS_FUNCTIONS || - drrs->drr_compressed_size == 0) - return (SET_ERROR(EINVAL)); - - flags |= DMU_READ_NO_DECRYPT; - } - - if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) - return (SET_ERROR(EINVAL)); - - if (drrs->drr_object > rwa->max_object) - rwa->max_object = drrs->drr_object; - - VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); - if ((err = dmu_spill_hold_by_bonus(db, DMU_READ_NO_DECRYPT, FTAG, - &db_spill)) != 0) { - dmu_buf_rele(db, FTAG); - return (err); - } - - tx = dmu_tx_create(rwa->os); - - dmu_tx_hold_spill(tx, db->db_object); - - err = dmu_tx_assign(tx, TXG_WAIT); - if (err != 0) { - dmu_buf_rele(db, FTAG); - dmu_buf_rele(db_spill, FTAG); - dmu_tx_abort(tx); - return (err); - } - - if (db_spill->db_size < drrs->drr_length) - VERIFY(0 == dbuf_spill_set_blksz(db_spill, - drrs->drr_length, tx)); - - if (rwa->byteswap && !arc_is_encrypted(abuf) && - arc_get_compression(abuf) == ZIO_COMPRESS_OFF) { - dmu_object_byteswap_t byteswap = - DMU_OT_BYTESWAP(drrs->drr_type); - dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, - DRR_SPILL_PAYLOAD_SIZE(drrs)); - } - - dbuf_assign_arcbuf((dmu_buf_impl_t *)db_spill, abuf, tx); - - dmu_buf_rele(db, FTAG); - dmu_buf_rele(db_spill, FTAG); - - dmu_tx_commit(tx); - return (0); -} - -/* ARGSUSED */ -noinline static int -receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) -{ - int err; - - if (drrf->drr_length != DMU_OBJECT_END && - drrf->drr_offset + drrf->drr_length < drrf->drr_offset) - return (SET_ERROR(EINVAL)); - - if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) - return (SET_ERROR(EINVAL)); - - if (drrf->drr_object > rwa->max_object) - rwa->max_object = drrf->drr_object; - - err = dmu_free_long_range(rwa->os, drrf->drr_object, - drrf->drr_offset, drrf->drr_length); - - return (err); -} - -static int -receive_object_range(struct receive_writer_arg *rwa, - struct drr_object_range *drror) -{ - /* - * By default, we assume this block is in our native format - * (ZFS_HOST_BYTEORDER). We then take into account whether - * the send stream is byteswapped (rwa->byteswap). Finally, - * we need to byteswap again if this particular block was - * in non-native format on the send side. - */ - boolean_t byteorder = ZFS_HOST_BYTEORDER ^ rwa->byteswap ^ - !!DRR_IS_RAW_BYTESWAPPED(drror->drr_flags); - - /* - * Since dnode block sizes are constant, we should not need to worry - * about making sure that the dnode block size is the same on the - * sending and receiving sides for the time being. For non-raw sends, - * this does not matter (and in fact we do not send a DRR_OBJECT_RANGE - * record at all). Raw sends require this record type because the - * encryption parameters are used to protect an entire block of bonus - * buffers. If the size of dnode blocks ever becomes variable, - * handling will need to be added to ensure that dnode block sizes - * match on the sending and receiving side. - */ - if (drror->drr_numslots != DNODES_PER_BLOCK || - P2PHASE(drror->drr_firstobj, DNODES_PER_BLOCK) != 0 || - !rwa->raw) - return (SET_ERROR(EINVAL)); - - if (drror->drr_firstobj > rwa->max_object) - rwa->max_object = drror->drr_firstobj; - - /* - * The DRR_OBJECT_RANGE handling must be deferred to receive_object() - * so that the block of dnodes is not written out when it's empty, - * and converted to a HOLE BP. - */ - rwa->or_crypt_params_present = B_TRUE; - rwa->or_firstobj = drror->drr_firstobj; - rwa->or_numslots = drror->drr_numslots; - bcopy(drror->drr_salt, rwa->or_salt, ZIO_DATA_SALT_LEN); - bcopy(drror->drr_iv, rwa->or_iv, ZIO_DATA_IV_LEN); - bcopy(drror->drr_mac, rwa->or_mac, ZIO_DATA_MAC_LEN); - rwa->or_byteorder = byteorder; - - return (0); -} - -/* used to destroy the drc_ds on error */ -static void -dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) -{ - dsl_dataset_t *ds = drc->drc_ds; - ds_hold_flags_t dsflags = (drc->drc_raw) ? 0 : DS_HOLD_FLAG_DECRYPT; - - /* - * Wait for the txg sync before cleaning up the receive. For - * resumable receives, this ensures that our resume state has - * been written out to disk. For raw receives, this ensures - * that the user accounting code will not attempt to do anything - * after we stopped receiving the dataset. - */ - txg_wait_synced(ds->ds_dir->dd_pool, 0); - ds->ds_objset->os_raw_receive = B_FALSE; - - rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); - if (drc->drc_resumable && !BP_IS_HOLE(dsl_dataset_get_blkptr(ds))) { - rrw_exit(&ds->ds_bp_rwlock, FTAG); - dsl_dataset_disown(ds, dsflags, dmu_recv_tag); - } else { - char name[ZFS_MAX_DATASET_NAME_LEN]; - rrw_exit(&ds->ds_bp_rwlock, FTAG); - dsl_dataset_name(ds, name); - dsl_dataset_disown(ds, dsflags, dmu_recv_tag); - (void) dsl_destroy_head(name); - } -} - -static void -receive_cksum(struct receive_arg *ra, int len, void *buf) -{ - if (ra->byteswap) { - (void) fletcher_4_incremental_byteswap(buf, len, &ra->cksum); - } else { - (void) fletcher_4_incremental_native(buf, len, &ra->cksum); - } -} - -/* - * Read the payload into a buffer of size len, and update the current record's - * payload field. - * Allocate ra->next_rrd and read the next record's header into - * ra->next_rrd->header. - * Verify checksum of payload and next record. - */ -static int -receive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) -{ - int err; - zio_cksum_t cksum_orig; - zio_cksum_t *cksump; - - if (len != 0) { - ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); - err = receive_read(ra, len, buf); - if (err != 0) - return (err); - receive_cksum(ra, len, buf); - - /* note: rrd is NULL when reading the begin record's payload */ - if (ra->rrd != NULL) { - ra->rrd->payload = buf; - ra->rrd->payload_size = len; - ra->rrd->bytes_read = ra->bytes_read; - } - } - - ra->prev_cksum = ra->cksum; - - ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); - err = receive_read(ra, sizeof (ra->next_rrd->header), - &ra->next_rrd->header); - ra->next_rrd->bytes_read = ra->bytes_read; - - if (err != 0) { - kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); - ra->next_rrd = NULL; - return (err); - } - if (ra->next_rrd->header.drr_type == DRR_BEGIN) { - kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); - ra->next_rrd = NULL; - return (SET_ERROR(EINVAL)); - } - - /* - * Note: checksum is of everything up to but not including the - * checksum itself. - */ - ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), - ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); - receive_cksum(ra, - offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), - &ra->next_rrd->header); - - cksum_orig = ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; - cksump = &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; - - if (ra->byteswap) - byteswap_record(&ra->next_rrd->header); - - if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && - !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { - kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); - ra->next_rrd = NULL; - return (SET_ERROR(ECKSUM)); - } - - receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); - - return (0); -} - -static void -objlist_create(struct objlist *list) -{ - list_create(&list->list, sizeof (struct receive_objnode), - offsetof(struct receive_objnode, node)); - list->last_lookup = 0; -} - -static void -objlist_destroy(struct objlist *list) -{ - for (struct receive_objnode *n = list_remove_head(&list->list); - n != NULL; n = list_remove_head(&list->list)) { - kmem_free(n, sizeof (*n)); - } - list_destroy(&list->list); -} - -/* - * This function looks through the objlist to see if the specified object number - * is contained in the objlist. In the process, it will remove all object - * numbers in the list that are smaller than the specified object number. Thus, - * any lookup of an object number smaller than a previously looked up object - * number will always return false; therefore, all lookups should be done in - * ascending order. - */ -static boolean_t -objlist_exists(struct objlist *list, uint64_t object) -{ - struct receive_objnode *node = list_head(&list->list); - ASSERT3U(object, >=, list->last_lookup); - list->last_lookup = object; - while (node != NULL && node->object < object) { - VERIFY3P(node, ==, list_remove_head(&list->list)); - kmem_free(node, sizeof (*node)); - node = list_head(&list->list); - } - return (node != NULL && node->object == object); -} - -/* - * The objlist is a list of object numbers stored in ascending order. However, - * the insertion of new object numbers does not seek out the correct location to - * store a new object number; instead, it appends it to the list for simplicity. - * Thus, any users must take care to only insert new object numbers in ascending - * order. - */ -static void -objlist_insert(struct objlist *list, uint64_t object) -{ - struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP); - node->object = object; -#ifdef ZFS_DEBUG - { - struct receive_objnode *last_object = list_tail(&list->list); - uint64_t last_objnum = (last_object != NULL ? last_object->object : 0); - ASSERT3U(node->object, >, last_objnum); - } -#endif - list_insert_tail(&list->list, node); -} - -/* - * Issue the prefetch reads for any necessary indirect blocks. - * - * We use the object ignore list to tell us whether or not to issue prefetches - * for a given object. We do this for both correctness (in case the blocksize - * of an object has changed) and performance (if the object doesn't exist, don't - * needlessly try to issue prefetches). We also trim the list as we go through - * the stream to prevent it from growing to an unbounded size. - * - * The object numbers within will always be in sorted order, and any write - * records we see will also be in sorted order, but they're not sorted with - * respect to each other (i.e. we can get several object records before - * receiving each object's write records). As a result, once we've reached a - * given object number, we can safely remove any reference to lower object - * numbers in the ignore list. In practice, we receive up to 32 object records - * before receiving write records, so the list can have up to 32 nodes in it. - */ -/* ARGSUSED */ -static void -receive_read_prefetch(struct receive_arg *ra, - uint64_t object, uint64_t offset, uint64_t length) -{ - if (!objlist_exists(&ra->ignore_objlist, object)) { - dmu_prefetch(ra->os, object, 1, offset, length, - ZIO_PRIORITY_SYNC_READ); - } -} - -/* - * Read records off the stream, issuing any necessary prefetches. - */ -static int -receive_read_record(struct receive_arg *ra) -{ - int err; - - switch (ra->rrd->header.drr_type) { - case DRR_OBJECT: - { - struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; - uint32_t size = DRR_OBJECT_PAYLOAD_SIZE(drro); - void *buf = kmem_zalloc(size, KM_SLEEP); - dmu_object_info_t doi; - - err = receive_read_payload_and_next_header(ra, size, buf); - if (err != 0) { - kmem_free(buf, size); - return (err); - } - err = dmu_object_info(ra->os, drro->drr_object, &doi); - /* - * See receive_read_prefetch for an explanation why we're - * storing this object in the ignore_obj_list. - */ - if (err == ENOENT || err == EEXIST || - (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { - objlist_insert(&ra->ignore_objlist, drro->drr_object); - err = 0; - } - return (err); - } - case DRR_FREEOBJECTS: - { - err = receive_read_payload_and_next_header(ra, 0, NULL); - return (err); - } - case DRR_WRITE: - { - struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; - arc_buf_t *abuf; - boolean_t is_meta = DMU_OT_IS_METADATA(drrw->drr_type); - - if (ra->raw) { - boolean_t byteorder = ZFS_HOST_BYTEORDER ^ - !!DRR_IS_RAW_BYTESWAPPED(drrw->drr_flags) ^ - ra->byteswap; - - abuf = arc_loan_raw_buf(dmu_objset_spa(ra->os), - drrw->drr_object, byteorder, drrw->drr_salt, - drrw->drr_iv, drrw->drr_mac, drrw->drr_type, - drrw->drr_compressed_size, drrw->drr_logical_size, - drrw->drr_compressiontype); - } else if (DRR_WRITE_COMPRESSED(drrw)) { - ASSERT3U(drrw->drr_compressed_size, >, 0); - ASSERT3U(drrw->drr_logical_size, >=, - drrw->drr_compressed_size); - ASSERT(!is_meta); - abuf = arc_loan_compressed_buf( - dmu_objset_spa(ra->os), - drrw->drr_compressed_size, drrw->drr_logical_size, - drrw->drr_compressiontype); - } else { - abuf = arc_loan_buf(dmu_objset_spa(ra->os), - is_meta, drrw->drr_logical_size); - } - - err = receive_read_payload_and_next_header(ra, - DRR_WRITE_PAYLOAD_SIZE(drrw), abuf->b_data); - if (err != 0) { - dmu_return_arcbuf(abuf); - return (err); - } - ra->rrd->arc_buf = abuf; - receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, - drrw->drr_logical_size); - return (err); - } - case DRR_WRITE_BYREF: - { - struct drr_write_byref *drrwb = - &ra->rrd->header.drr_u.drr_write_byref; - err = receive_read_payload_and_next_header(ra, 0, NULL); - receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, - drrwb->drr_length); - return (err); - } - case DRR_WRITE_EMBEDDED: - { - struct drr_write_embedded *drrwe = - &ra->rrd->header.drr_u.drr_write_embedded; - uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); - void *buf = kmem_zalloc(size, KM_SLEEP); - - err = receive_read_payload_and_next_header(ra, size, buf); - if (err != 0) { - kmem_free(buf, size); - return (err); - } - - receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, - drrwe->drr_length); - return (err); - } - case DRR_FREE: - { - /* - * It might be beneficial to prefetch indirect blocks here, but - * we don't really have the data to decide for sure. - */ - err = receive_read_payload_and_next_header(ra, 0, NULL); - return (err); - } - case DRR_END: - { - struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; - if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) - return (SET_ERROR(ECKSUM)); - return (0); - } - case DRR_SPILL: - { - struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; - arc_buf_t *abuf; - int len = DRR_SPILL_PAYLOAD_SIZE(drrs); - - /* DRR_SPILL records are either raw or uncompressed */ - if (ra->raw) { - boolean_t byteorder = ZFS_HOST_BYTEORDER ^ - !!DRR_IS_RAW_BYTESWAPPED(drrs->drr_flags) ^ - ra->byteswap; - - abuf = arc_loan_raw_buf(dmu_objset_spa(ra->os), - dmu_objset_id(ra->os), byteorder, drrs->drr_salt, - drrs->drr_iv, drrs->drr_mac, drrs->drr_type, - drrs->drr_compressed_size, drrs->drr_length, - drrs->drr_compressiontype); - } else { - abuf = arc_loan_buf(dmu_objset_spa(ra->os), - DMU_OT_IS_METADATA(drrs->drr_type), - drrs->drr_length); - } - - err = receive_read_payload_and_next_header(ra, len, - abuf->b_data); - if (err != 0) { - dmu_return_arcbuf(abuf); - return (err); - } - ra->rrd->arc_buf = abuf; - return (err); - } - case DRR_OBJECT_RANGE: - { - err = receive_read_payload_and_next_header(ra, 0, NULL); - return (err); - } - default: - return (SET_ERROR(EINVAL)); - } -} - -static void -dprintf_drr(struct receive_record_arg *rrd, int err) -{ -#ifdef ZFS_DEBUG - switch (rrd->header.drr_type) { - case DRR_OBJECT: - { - struct drr_object *drro = &rrd->header.drr_u.drr_object; - dprintf("drr_type = OBJECT obj = %llu type = %u " - "bonustype = %u blksz = %u bonuslen = %u cksumtype = %u " - "compress = %u dn_slots = %u err = %d\n", - drro->drr_object, drro->drr_type, drro->drr_bonustype, - drro->drr_blksz, drro->drr_bonuslen, - drro->drr_checksumtype, drro->drr_compress, - drro->drr_dn_slots, err); - break; - } - case DRR_FREEOBJECTS: - { - struct drr_freeobjects *drrfo = - &rrd->header.drr_u.drr_freeobjects; - dprintf("drr_type = FREEOBJECTS firstobj = %llu " - "numobjs = %llu err = %d\n", - drrfo->drr_firstobj, drrfo->drr_numobjs, err); - break; - } - case DRR_WRITE: - { - struct drr_write *drrw = &rrd->header.drr_u.drr_write; - dprintf("drr_type = WRITE obj = %llu type = %u offset = %llu " - "lsize = %llu cksumtype = %u cksumflags = %u " - "compress = %u psize = %llu err = %d\n", - drrw->drr_object, drrw->drr_type, drrw->drr_offset, - drrw->drr_logical_size, drrw->drr_checksumtype, - drrw->drr_flags, drrw->drr_compressiontype, - drrw->drr_compressed_size, err); - break; - } - case DRR_WRITE_BYREF: - { - struct drr_write_byref *drrwbr = - &rrd->header.drr_u.drr_write_byref; - dprintf("drr_type = WRITE_BYREF obj = %llu offset = %llu " - "length = %llu toguid = %llx refguid = %llx " - "refobject = %llu refoffset = %llu cksumtype = %u " - "cksumflags = %u err = %d\n", - drrwbr->drr_object, drrwbr->drr_offset, - drrwbr->drr_length, drrwbr->drr_toguid, - drrwbr->drr_refguid, drrwbr->drr_refobject, - drrwbr->drr_refoffset, drrwbr->drr_checksumtype, - drrwbr->drr_flags, err); - break; - } - case DRR_WRITE_EMBEDDED: - { - struct drr_write_embedded *drrwe = - &rrd->header.drr_u.drr_write_embedded; - dprintf("drr_type = WRITE_EMBEDDED obj = %llu offset = %llu " - "length = %llu compress = %u etype = %u lsize = %u " - "psize = %u err = %d\n", - drrwe->drr_object, drrwe->drr_offset, drrwe->drr_length, - drrwe->drr_compression, drrwe->drr_etype, - drrwe->drr_lsize, drrwe->drr_psize, err); - break; - } - case DRR_FREE: - { - struct drr_free *drrf = &rrd->header.drr_u.drr_free; - dprintf("drr_type = FREE obj = %llu offset = %llu " - "length = %lld err = %d\n", - drrf->drr_object, drrf->drr_offset, drrf->drr_length, - err); - break; - } - case DRR_SPILL: - { - struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; - dprintf("drr_type = SPILL obj = %llu length = %llu " - "err = %d\n", drrs->drr_object, drrs->drr_length, err); - break; - } - default: - return; - } -#endif -} - -/* - * Commit the records to the pool. - */ -static int -receive_process_record(struct receive_writer_arg *rwa, - struct receive_record_arg *rrd) -{ - int err; - - /* Processing in order, therefore bytes_read should be increasing. */ - ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); - rwa->bytes_read = rrd->bytes_read; - - switch (rrd->header.drr_type) { - case DRR_OBJECT: - { - struct drr_object *drro = &rrd->header.drr_u.drr_object; - err = receive_object(rwa, drro, rrd->payload); - kmem_free(rrd->payload, rrd->payload_size); - rrd->payload = NULL; - break; - } - case DRR_FREEOBJECTS: - { - struct drr_freeobjects *drrfo = - &rrd->header.drr_u.drr_freeobjects; - err = receive_freeobjects(rwa, drrfo); - break; - } - case DRR_WRITE: - { - struct drr_write *drrw = &rrd->header.drr_u.drr_write; - err = receive_write(rwa, drrw, rrd->arc_buf); - /* if receive_write() is successful, it consumes the arc_buf */ - if (err != 0) - dmu_return_arcbuf(rrd->arc_buf); - rrd->arc_buf = NULL; - rrd->payload = NULL; - break; - } - case DRR_WRITE_BYREF: - { - struct drr_write_byref *drrwbr = - &rrd->header.drr_u.drr_write_byref; - err = receive_write_byref(rwa, drrwbr); - break; - } - case DRR_WRITE_EMBEDDED: - { - struct drr_write_embedded *drrwe = - &rrd->header.drr_u.drr_write_embedded; - err = receive_write_embedded(rwa, drrwe, rrd->payload); - kmem_free(rrd->payload, rrd->payload_size); - rrd->payload = NULL; - break; - } - case DRR_FREE: - { - struct drr_free *drrf = &rrd->header.drr_u.drr_free; - err = receive_free(rwa, drrf); - break; - } - case DRR_SPILL: - { - struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; - err = receive_spill(rwa, drrs, rrd->arc_buf); - /* if receive_spill() is successful, it consumes the arc_buf */ - if (err != 0) - dmu_return_arcbuf(rrd->arc_buf); - rrd->arc_buf = NULL; - rrd->payload = NULL; - break; - } - case DRR_OBJECT_RANGE: - { - struct drr_object_range *drror = - &rrd->header.drr_u.drr_object_range; - return (receive_object_range(rwa, drror)); - } - default: - return (SET_ERROR(EINVAL)); - } - - if (err != 0) - dprintf_drr(rrd, err); - - return (err); -} - -/* - * dmu_recv_stream's worker thread; pull records off the queue, and then call - * receive_process_record When we're done, signal the main thread and exit. - */ -static void -receive_writer_thread(void *arg) -{ - struct receive_writer_arg *rwa = arg; - struct receive_record_arg *rrd; - fstrans_cookie_t cookie = spl_fstrans_mark(); - - for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; - rrd = bqueue_dequeue(&rwa->q)) { - /* - * If there's an error, the main thread will stop putting things - * on the queue, but we need to clear everything in it before we - * can exit. - */ - if (rwa->err == 0) { - rwa->err = receive_process_record(rwa, rrd); - } else if (rrd->arc_buf != NULL) { - dmu_return_arcbuf(rrd->arc_buf); - rrd->arc_buf = NULL; - rrd->payload = NULL; - } else if (rrd->payload != NULL) { - kmem_free(rrd->payload, rrd->payload_size); - rrd->payload = NULL; - } - kmem_free(rrd, sizeof (*rrd)); - } - kmem_free(rrd, sizeof (*rrd)); - mutex_enter(&rwa->mutex); - rwa->done = B_TRUE; - cv_signal(&rwa->cv); - mutex_exit(&rwa->mutex); - spl_fstrans_unmark(cookie); - thread_exit(); -} - -static int -resume_check(struct receive_arg *ra, nvlist_t *begin_nvl) -{ - uint64_t val; - objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset; - uint64_t dsobj = dmu_objset_id(ra->os); - uint64_t resume_obj, resume_off; - - if (nvlist_lookup_uint64(begin_nvl, - "resume_object", &resume_obj) != 0 || - nvlist_lookup_uint64(begin_nvl, - "resume_offset", &resume_off) != 0) { - return (SET_ERROR(EINVAL)); - } - VERIFY0(zap_lookup(mos, dsobj, - DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); - if (resume_obj != val) - return (SET_ERROR(EINVAL)); - VERIFY0(zap_lookup(mos, dsobj, - DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); - if (resume_off != val) - return (SET_ERROR(EINVAL)); - - return (0); -} - -/* - * Read in the stream's records, one by one, and apply them to the pool. There - * are two threads involved; the thread that calls this function will spin up a - * worker thread, read the records off the stream one by one, and issue - * prefetches for any necessary indirect blocks. It will then push the records - * onto an internal blocking queue. The worker thread will pull the records off - * the queue, and actually write the data into the DMU. This way, the worker - * thread doesn't have to wait for reads to complete, since everything it needs - * (the indirect blocks) will be prefetched. - * - * NB: callers *must* call dmu_recv_end() if this succeeds. - */ -int -dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, - int cleanup_fd, uint64_t *action_handlep) -{ - int err = 0; - struct receive_arg *ra; - struct receive_writer_arg *rwa; - int featureflags; - uint32_t payloadlen; - void *payload; - nvlist_t *begin_nvl = NULL; - - ra = kmem_zalloc(sizeof (*ra), KM_SLEEP); - rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP); - - ra->byteswap = drc->drc_byteswap; - ra->raw = drc->drc_raw; - ra->cksum = drc->drc_cksum; - ra->vp = vp; - ra->voff = *voffp; - - if (dsl_dataset_is_zapified(drc->drc_ds)) { - (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, - drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, - sizeof (ra->bytes_read), 1, &ra->bytes_read); - } - - objlist_create(&ra->ignore_objlist); - - /* these were verified in dmu_recv_begin */ - ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, - DMU_SUBSTREAM); - ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); - - /* - * Open the objset we are modifying. - */ - VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra->os)); - - ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); - - featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); - ra->featureflags = featureflags; - - ASSERT0(ra->os->os_encrypted && - (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)); - - /* if this stream is dedup'ed, set up the avl tree for guid mapping */ - if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { - minor_t minor; - - if (cleanup_fd == -1) { - err = SET_ERROR(EBADF); - goto out; - } - err = zfs_onexit_fd_hold(cleanup_fd, &minor); - if (err != 0) { - cleanup_fd = -1; - goto out; - } - - if (*action_handlep == 0) { - rwa->guid_to_ds_map = - kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); - avl_create(rwa->guid_to_ds_map, guid_compare, - sizeof (guid_map_entry_t), - offsetof(guid_map_entry_t, avlnode)); - err = zfs_onexit_add_cb(minor, - free_guid_map_onexit, rwa->guid_to_ds_map, - action_handlep); - if (err != 0) - goto out; - } else { - err = zfs_onexit_cb_data(minor, *action_handlep, - (void **)&rwa->guid_to_ds_map); - if (err != 0) - goto out; - } - - drc->drc_guid_to_ds_map = rwa->guid_to_ds_map; - } - - payloadlen = drc->drc_drr_begin->drr_payloadlen; - payload = NULL; - if (payloadlen != 0) - payload = kmem_alloc(payloadlen, KM_SLEEP); - - err = receive_read_payload_and_next_header(ra, payloadlen, payload); - if (err != 0) { - if (payloadlen != 0) - kmem_free(payload, payloadlen); - goto out; - } - if (payloadlen != 0) { - err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP); - kmem_free(payload, payloadlen); - if (err != 0) - goto out; - } - - /* handle DSL encryption key payload */ - if (featureflags & DMU_BACKUP_FEATURE_RAW) { - nvlist_t *keynvl = NULL; - - ASSERT(ra->os->os_encrypted); - ASSERT(drc->drc_raw); - - err = nvlist_lookup_nvlist(begin_nvl, "crypt_keydata", &keynvl); - if (err != 0) - goto out; - - /* - * If this is a new dataset we set the key immediately. - * Otherwise we don't want to change the key until we - * are sure the rest of the receive succeeded so we stash - * the keynvl away until then. - */ - err = dsl_crypto_recv_raw(spa_name(ra->os->os_spa), - drc->drc_ds->ds_object, drc->drc_drrb->drr_type, - keynvl, drc->drc_newfs); - if (err != 0) - goto out; - - if (!drc->drc_newfs) - drc->drc_keynvl = fnvlist_dup(keynvl); - } - - if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { - err = resume_check(ra, begin_nvl); - if (err != 0) - goto out; - } - - (void) bqueue_init(&rwa->q, - MAX(zfs_recv_queue_length, 2 * zfs_max_recordsize), - offsetof(struct receive_record_arg, node)); - cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL); - mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL); - rwa->os = ra->os; - rwa->byteswap = drc->drc_byteswap; - rwa->resumable = drc->drc_resumable; - rwa->raw = drc->drc_raw; - rwa->os->os_raw_receive = drc->drc_raw; - - (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc, - TS_RUN, minclsyspri); - /* - * We're reading rwa->err without locks, which is safe since we are the - * only reader, and the worker thread is the only writer. It's ok if we - * miss a write for an iteration or two of the loop, since the writer - * thread will keep freeing records we send it until we send it an eos - * marker. - * - * We can leave this loop in 3 ways: First, if rwa->err is - * non-zero. In that case, the writer thread will free the rrd we just - * pushed. Second, if we're interrupted; in that case, either it's the - * first loop and ra->rrd was never allocated, or it's later and ra->rrd - * has been handed off to the writer thread who will free it. Finally, - * if receive_read_record fails or we're at the end of the stream, then - * we free ra->rrd and exit. - */ - while (rwa->err == 0) { - if (issig(JUSTLOOKING) && issig(FORREAL)) { - err = SET_ERROR(EINTR); - break; - } - - ASSERT3P(ra->rrd, ==, NULL); - ra->rrd = ra->next_rrd; - ra->next_rrd = NULL; - /* Allocates and loads header into ra->next_rrd */ - err = receive_read_record(ra); - - if (ra->rrd->header.drr_type == DRR_END || err != 0) { - kmem_free(ra->rrd, sizeof (*ra->rrd)); - ra->rrd = NULL; - break; - } - - bqueue_enqueue(&rwa->q, ra->rrd, - sizeof (struct receive_record_arg) + ra->rrd->payload_size); - ra->rrd = NULL; - } - if (ra->next_rrd == NULL) - ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); - ra->next_rrd->eos_marker = B_TRUE; - bqueue_enqueue(&rwa->q, ra->next_rrd, 1); - - mutex_enter(&rwa->mutex); - while (!rwa->done) { - cv_wait(&rwa->cv, &rwa->mutex); - } - mutex_exit(&rwa->mutex); - - /* - * If we are receiving a full stream as a clone, all object IDs which - * are greater than the maximum ID referenced in the stream are - * by definition unused and must be freed. - */ - if (drc->drc_clone && drc->drc_drrb->drr_fromguid == 0) { - uint64_t obj = rwa->max_object + 1; - int free_err = 0; - int next_err = 0; - - while (next_err == 0) { - free_err = dmu_free_long_object(rwa->os, obj); - if (free_err != 0 && free_err != ENOENT) - break; - - next_err = dmu_object_next(rwa->os, &obj, FALSE, 0); - } - - if (err == 0) { - if (free_err != 0 && free_err != ENOENT) - err = free_err; - else if (next_err != ESRCH) - err = next_err; - } - } - - cv_destroy(&rwa->cv); - mutex_destroy(&rwa->mutex); - bqueue_destroy(&rwa->q); - if (err == 0) - err = rwa->err; - -out: - nvlist_free(begin_nvl); - if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) - zfs_onexit_fd_rele(cleanup_fd); - - if (err != 0) { - /* - * Clean up references. If receive is not resumable, - * destroy what we created, so we don't leave it in - * the inconsistent state. - */ - dmu_recv_cleanup_ds(drc); - nvlist_free(drc->drc_keynvl); - } - - *voffp = ra->voff; - objlist_destroy(&ra->ignore_objlist); - kmem_free(ra, sizeof (*ra)); - kmem_free(rwa, sizeof (*rwa)); - return (err); -} - -static int -dmu_recv_end_check(void *arg, dmu_tx_t *tx) -{ - dmu_recv_cookie_t *drc = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - int error; - - ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); - - if (!drc->drc_newfs) { - dsl_dataset_t *origin_head; - - error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); - if (error != 0) - return (error); - if (drc->drc_force) { - /* - * We will destroy any snapshots in tofs (i.e. before - * origin_head) that are after the origin (which is - * the snap before drc_ds, because drc_ds can not - * have any snaps of its own). - */ - uint64_t obj; - - obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; - while (obj != - dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { - dsl_dataset_t *snap; - error = dsl_dataset_hold_obj(dp, obj, FTAG, - &snap); - if (error != 0) - break; - if (snap->ds_dir != origin_head->ds_dir) - error = SET_ERROR(EINVAL); - if (error == 0) { - error = dsl_destroy_snapshot_check_impl( - snap, B_FALSE); - } - obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; - dsl_dataset_rele(snap, FTAG); - if (error != 0) - break; - } - if (error != 0) { - dsl_dataset_rele(origin_head, FTAG); - return (error); - } - } - if (drc->drc_keynvl != NULL) { - error = dsl_crypto_recv_raw_key_check(drc->drc_ds, - drc->drc_keynvl, tx); - if (error != 0) { - dsl_dataset_rele(origin_head, FTAG); - return (error); - } - } - - error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, - origin_head, drc->drc_force, drc->drc_owner, tx); - if (error != 0) { - dsl_dataset_rele(origin_head, FTAG); - return (error); - } - error = dsl_dataset_snapshot_check_impl(origin_head, - drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); - dsl_dataset_rele(origin_head, FTAG); - if (error != 0) - return (error); - - error = dsl_destroy_head_check_impl(drc->drc_ds, 1); - } else { - error = dsl_dataset_snapshot_check_impl(drc->drc_ds, - drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); - } - return (error); -} - -static void -dmu_recv_end_sync(void *arg, dmu_tx_t *tx) -{ - dmu_recv_cookie_t *drc = arg; - dsl_pool_t *dp = dmu_tx_pool(tx); - boolean_t encrypted = drc->drc_ds->ds_dir->dd_crypto_obj != 0; - - spa_history_log_internal_ds(drc->drc_ds, "finish receiving", - tx, "snap=%s", drc->drc_tosnap); - drc->drc_ds->ds_objset->os_raw_receive = B_FALSE; - - if (!drc->drc_newfs) { - dsl_dataset_t *origin_head; - - VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, - &origin_head)); - - if (drc->drc_force) { - /* - * Destroy any snapshots of drc_tofs (origin_head) - * after the origin (the snap before drc_ds). - */ - uint64_t obj; - - obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; - while (obj != - dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { - dsl_dataset_t *snap; - VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, - &snap)); - ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); - obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; - dsl_destroy_snapshot_sync_impl(snap, - B_FALSE, tx); - dsl_dataset_rele(snap, FTAG); - } - } - if (drc->drc_keynvl != NULL) { - dsl_crypto_recv_raw_key_sync(drc->drc_ds, - drc->drc_keynvl, tx); - nvlist_free(drc->drc_keynvl); - drc->drc_keynvl = NULL; - } - - VERIFY3P(drc->drc_ds->ds_prev, ==, origin_head->ds_prev); - - dsl_dataset_clone_swap_sync_impl(drc->drc_ds, - origin_head, tx); - dsl_dataset_snapshot_sync_impl(origin_head, - drc->drc_tosnap, tx); - - /* set snapshot's creation time and guid */ - dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); - dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = - drc->drc_drrb->drr_creation_time; - dsl_dataset_phys(origin_head->ds_prev)->ds_guid = - drc->drc_drrb->drr_toguid; - dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= - ~DS_FLAG_INCONSISTENT; - - dmu_buf_will_dirty(origin_head->ds_dbuf, tx); - dsl_dataset_phys(origin_head)->ds_flags &= - ~DS_FLAG_INCONSISTENT; - - drc->drc_newsnapobj = - dsl_dataset_phys(origin_head)->ds_prev_snap_obj; - - dsl_dataset_rele(origin_head, FTAG); - dsl_destroy_head_sync_impl(drc->drc_ds, tx); - - if (drc->drc_owner != NULL) - VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); - } else { - dsl_dataset_t *ds = drc->drc_ds; - - dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); - - /* set snapshot's creation time and guid */ - dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); - dsl_dataset_phys(ds->ds_prev)->ds_creation_time = - drc->drc_drrb->drr_creation_time; - dsl_dataset_phys(ds->ds_prev)->ds_guid = - drc->drc_drrb->drr_toguid; - dsl_dataset_phys(ds->ds_prev)->ds_flags &= - ~DS_FLAG_INCONSISTENT; - - dmu_buf_will_dirty(ds->ds_dbuf, tx); - dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; - if (dsl_dataset_has_resume_receive_state(ds)) { - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_FROMGUID, tx); - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_OBJECT, tx); - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_OFFSET, tx); - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_BYTES, tx); - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_TOGUID, tx); - (void) zap_remove(dp->dp_meta_objset, ds->ds_object, - DS_FIELD_RESUME_TONAME, tx); - } - drc->drc_newsnapobj = - dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; - } - zvol_create_minors(dp->dp_spa, drc->drc_tofs, B_TRUE); - - /* - * Release the hold from dmu_recv_begin. This must be done before - * we return to open context, so that when we free the dataset's dnode - * we can evict its bonus buffer. Since the dataset may be destroyed - * at this point (and therefore won't have a valid pointer to the spa) - * we release the key mapping manually here while we do have a valid - * pointer, if it exists. - */ - if (!drc->drc_raw && encrypted) { - (void) spa_keystore_remove_mapping(dmu_tx_pool(tx)->dp_spa, - drc->drc_ds->ds_object, drc->drc_ds); - } - dsl_dataset_disown(drc->drc_ds, 0, dmu_recv_tag); - drc->drc_ds = NULL; -} - -static int -add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj, - boolean_t raw) -{ - dsl_pool_t *dp; - dsl_dataset_t *snapds; - guid_map_entry_t *gmep; - objset_t *os; - ds_hold_flags_t dsflags = (raw) ? 0 : DS_HOLD_FLAG_DECRYPT; - int err; - - ASSERT(guid_map != NULL); - - err = dsl_pool_hold(name, FTAG, &dp); - if (err != 0) - return (err); - gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); - err = dsl_dataset_own_obj(dp, snapobj, dsflags, gmep, &snapds); - if (err == 0) { - /* - * If this is a deduplicated raw send stream, we need - * to make sure that we can still read raw blocks from - * earlier datasets in the stream, so we set the - * os_raw_receive flag now. - */ - if (raw) { - err = dmu_objset_from_ds(snapds, &os); - if (err != 0) { - dsl_dataset_disown(snapds, dsflags, FTAG); - dsl_pool_rele(dp, FTAG); - kmem_free(gmep, sizeof (*gmep)); - return (err); - } - os->os_raw_receive = B_TRUE; - } - - gmep->raw = raw; - gmep->guid = dsl_dataset_phys(snapds)->ds_guid; - gmep->gme_ds = snapds; - avl_add(guid_map, gmep); - } else { - kmem_free(gmep, sizeof (*gmep)); - } - - dsl_pool_rele(dp, FTAG); - return (err); -} - -static int dmu_recv_end_modified_blocks = 3; - -static int -dmu_recv_existing_end(dmu_recv_cookie_t *drc) -{ -#ifdef _KERNEL - /* - * We will be destroying the ds; make sure its origin is unmounted if - * necessary. - */ - char name[ZFS_MAX_DATASET_NAME_LEN]; - dsl_dataset_name(drc->drc_ds, name); - zfs_destroy_unmount_origin(name); -#endif - - return (dsl_sync_task(drc->drc_tofs, - dmu_recv_end_check, dmu_recv_end_sync, drc, - dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); -} - -static int -dmu_recv_new_end(dmu_recv_cookie_t *drc) -{ - return (dsl_sync_task(drc->drc_tofs, - dmu_recv_end_check, dmu_recv_end_sync, drc, - dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); -} - -int -dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) -{ - int error; - - drc->drc_owner = owner; - - if (drc->drc_newfs) - error = dmu_recv_new_end(drc); - else - error = dmu_recv_existing_end(drc); - - if (error != 0) { - dmu_recv_cleanup_ds(drc); - nvlist_free(drc->drc_keynvl); - } else if (drc->drc_guid_to_ds_map != NULL) { - (void) add_ds_to_guidmap(drc->drc_tofs, drc->drc_guid_to_ds_map, - drc->drc_newsnapobj, drc->drc_raw); - } - return (error); -} - -/* - * Return TRUE if this objset is currently being received into. - */ -boolean_t -dmu_objset_is_receiving(objset_t *os) -{ - return (os->os_dsl_dataset != NULL && - os->os_dsl_dataset->ds_owner == dmu_recv_tag); -} #if defined(_KERNEL) /* BEGIN CSTYLED */ @@ -4355,7 +1529,4 @@ MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data"); module_param(zfs_send_queue_length, int, 0644); MODULE_PARM_DESC(zfs_send_queue_length, "Maximum send queue length"); - -module_param(zfs_recv_queue_length, int, 0644); -MODULE_PARM_DESC(zfs_recv_queue_length, "Maximum receive queue length"); #endif |