Author: mav Date: Wed Oct 14 11:36:55 2015 New Revision: 289312 URL: https://svnweb.freebsd.org/changeset/base/289312
Log: 2605 want to resume interrupted zfs send Reviewed by: George Wilson <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: Richard Elling <[email protected]> Reviewed by: Xin Li <[email protected]> Reviewed by: Arne Jansen <[email protected]> Approved by: Dan McDonald <[email protected]> Author: Matthew Ahrens <[email protected]> illumos/illumos-gate@9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8 Modified: vendor-sys/illumos/dist/common/zfs/zfs_prop.c vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_objset.c vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_send.c vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_dataset.c vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_destroy.c vendor-sys/illumos/dist/uts/common/fs/zfs/sys/dmu_impl.h vendor-sys/illumos/dist/uts/common/fs/zfs/sys/dmu_send.h vendor-sys/illumos/dist/uts/common/fs/zfs/sys/dmu_traverse.h vendor-sys/illumos/dist/uts/common/fs/zfs/sys/dsl_dataset.h vendor-sys/illumos/dist/uts/common/fs/zfs/sys/zfs_ioctl.h vendor-sys/illumos/dist/uts/common/fs/zfs/zfs_ioctl.c vendor-sys/illumos/dist/uts/common/sys/fs/zfs.h Changes in other areas also in this revision: Modified: vendor/illumos/dist/cmd/zfs/zfs_main.c vendor/illumos/dist/cmd/zstreamdump/zstreamdump.c vendor/illumos/dist/lib/libzfs/common/libzfs.h vendor/illumos/dist/lib/libzfs/common/libzfs_dataset.c vendor/illumos/dist/lib/libzfs/common/libzfs_mount.c vendor/illumos/dist/lib/libzfs/common/libzfs_sendrecv.c vendor/illumos/dist/lib/libzfs_core/common/libzfs_core.c vendor/illumos/dist/lib/libzfs_core/common/libzfs_core.h Modified: vendor-sys/illumos/dist/common/zfs/zfs_prop.c ============================================================================== --- vendor-sys/illumos/dist/common/zfs/zfs_prop.c Wed Oct 14 11:33:07 2015 (r289311) +++ vendor-sys/illumos/dist/common/zfs/zfs_prop.c Wed Oct 14 11:36:55 2015 (r289312) @@ -342,6 +342,10 @@ zfs_prop_init(void) zprop_register_string(ZFS_PROP_MLSLABEL, "mlslabel", ZFS_MLSLABEL_DEFAULT, PROP_INHERIT, ZFS_TYPE_DATASET, "<sensitivity label>", "MLSLABEL"); + zprop_register_string(ZFS_PROP_RECEIVE_RESUME_TOKEN, + "receive_resume_token", + NULL, PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, + "<string token>", "RESUMETOK"); /* readonly number properties */ zprop_register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY, Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_objset.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_objset.c Wed Oct 14 11:33:07 2015 (r289311) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_objset.c Wed Oct 14 11:36:55 2015 (r289312) @@ -362,6 +362,17 @@ dmu_objset_open_impl(spa_t *spa, dsl_dat * checksum/compression/copies. */ if (ds != NULL) { + boolean_t needlock = B_FALSE; + + /* + * Note: it's valid to open the objset if the dataset is + * long-held, in which case the pool_config lock will not + * be held. + */ + if (!dsl_pool_config_held(dmu_objset_pool(os))) { + needlock = B_TRUE; + dsl_pool_config_enter(dmu_objset_pool(os), FTAG); + } err = dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE), primary_cache_changed_cb, os); @@ -413,6 +424,8 @@ dmu_objset_open_impl(spa_t *spa, dsl_dat recordsize_changed_cb, os); } } + if (needlock) + dsl_pool_config_exit(dmu_objset_pool(os), FTAG); if (err != 0) { VERIFY(arc_buf_remove_ref(os->os_phys_buf, &os->os_phys_buf)); @@ -469,6 +482,13 @@ dmu_objset_from_ds(dsl_dataset_t *ds, ob { int err = 0; + /* + * We shouldn't be doing anything with dsl_dataset_t's unless the + * pool_config lock is held, or the dataset is long-held. + */ + ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool) || + dsl_dataset_long_held(ds)); + mutex_enter(&ds->ds_opening_lock); if (ds->ds_objset == NULL) { objset_t *os; Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_send.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_send.c Wed Oct 14 11:33:07 2015 (r289311) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_send.c Wed Oct 14 11:36:55 2015 (r289312) @@ -60,12 +60,14 @@ int zfs_send_queue_length = 16 * 1024 * int zfs_recv_queue_length = 16 * 1024 * 1024; static char *dmu_recv_tag = "dmu_recv_tag"; -static const char *recv_clone_name = "%recv"; +const char *recv_clone_name = "%recv"; #define BP_SPAN(datablkszsec, indblkshift, level) \ (((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 */ @@ -73,6 +75,7 @@ struct send_thread_arg { int flags; /* flags to pass to traverse_dataset */ int error_code; boolean_t cancel; + zbookmark_phys_t resume; }; struct send_block_record { @@ -87,7 +90,7 @@ struct send_block_record { static int dump_bytes(dmu_sendarg_t *dsp, void *buf, int len) { - dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset; + dsl_dataset_t *ds = dmu_objset_ds(dsp->dsa_os); ssize_t resid; /* have to get resid to get detailed errno */ ASSERT0(len % 8); @@ -145,7 +148,7 @@ dump_free(dmu_sendarg_t *dsp, uint64_t o * that the receiving system doesn't have any dbufs in the range * being freed. This is always true because there is a one-record * constraint: we only send one WRITE record for any given - * object+offset. We know that the one-record constraint is + * object,offset. We know that the one-record constraint is * true because we always send data in increasing order by * object,offset. * @@ -394,6 +397,19 @@ dump_dnode(dmu_sendarg_t *dsp, uint64_t { struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); + if (object < dsp->dsa_resume_object) { + /* + * Note: when resuming, we will visit all the dnodes in + * the block of dnodes that we are resuming from. In + * this case it's unnecessary to send the dnodes prior to + * the one we are resuming from. We should be at most one + * block's worth of dnodes behind the resume point. + */ + ASSERT3U(dsp->dsa_resume_object - object, <, + 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)); + return (0); + } + if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) return (dump_freeobjects(dsp, object, 1)); @@ -474,6 +490,9 @@ send_cb(spa_t *spa, zilog_t *zilog, cons uint64_t record_size; int err = 0; + ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || + zb->zb_object >= sta->resume.zb_object); + if (sta->cancel) return (SET_ERROR(EINTR)); @@ -510,8 +529,10 @@ send_traverse_thread(void *arg) struct send_block_record *data; if (st_arg->ds != NULL) { - err = traverse_dataset(st_arg->ds, st_arg->fromtxg, - st_arg->flags, send_cb, arg); + err = traverse_dataset_resume(st_arg->ds, + st_arg->fromtxg, &st_arg->resume, + st_arg->flags, send_cb, st_arg); + if (err != EINTR) st_arg->error_code = err; } @@ -539,6 +560,9 @@ do_dump(dmu_sendarg_t *dsa, struct send_ ASSERT3U(zb->zb_level, >=, 0); + ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || + zb->zb_object >= dsa->dsa_resume_object); + if (zb->zb_object != DMU_META_DNODE_OBJECT && DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { return (0); @@ -599,6 +623,10 @@ do_dump(dmu_sendarg_t *dsa, struct send_ uint64_t offset; ASSERT0(zb->zb_level); + ASSERT(zb->zb_object > dsa->dsa_resume_object || + (zb->zb_object == dsa->dsa_resume_object && + zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); + if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &aflags, zb) != 0) { @@ -659,8 +687,10 @@ get_next_record(bqueue_t *bq, struct sen */ static int dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, - zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone, boolean_t embedok, - boolean_t large_block_ok, int outfd, vnode_t *vp, offset_t *off) + zfs_bookmark_phys_t *ancestor_zb, + boolean_t is_clone, boolean_t embedok, boolean_t large_block_ok, int outfd, + uint64_t resumeobj, uint64_t resumeoff, + vnode_t *vp, offset_t *off) { objset_t *os; dmu_replay_record_t *drr; @@ -668,7 +698,7 @@ dmu_send_impl(void *tag, dsl_pool_t *dp, int err; uint64_t fromtxg = 0; uint64_t featureflags = 0; - struct send_thread_arg to_arg; + struct send_thread_arg to_arg = { 0 }; err = dmu_objset_from_ds(to_ds, &os); if (err != 0) { @@ -705,6 +735,10 @@ dmu_send_impl(void *tag, dsl_pool_t *dp, featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; } + if (resumeobj != 0 || resumeoff != 0) { + featureflags |= DMU_BACKUP_FEATURE_RESUMING; + } + DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, featureflags); @@ -740,6 +774,8 @@ dmu_send_impl(void *tag, dsl_pool_t *dp, dsp->dsa_pending_op = PENDING_NONE; dsp->dsa_incremental = (ancestor_zb != NULL); dsp->dsa_featureflags = featureflags; + dsp->dsa_resume_object = resumeobj; + dsp->dsa_resume_offset = resumeoff; mutex_enter(&to_ds->ds_sendstream_lock); list_insert_head(&to_ds->ds_sendstreams, dsp); @@ -748,7 +784,27 @@ dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_long_hold(to_ds, FTAG); dsl_pool_rele(dp, tag); - if (dump_record(dsp, NULL, 0) != 0) { + void *payload = NULL; + size_t payload_len = 0; + if (resumeobj != 0 || resumeoff != 0) { + dmu_object_info_t to_doi; + err = dmu_object_info(os, resumeobj, &to_doi); + if (err != 0) + goto out; + SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0, + resumeoff / to_doi.doi_data_block_size); + + nvlist_t *nvl = fnvlist_alloc(); + fnvlist_add_uint64(nvl, "resume_object", resumeobj); + fnvlist_add_uint64(nvl, "resume_offset", resumeoff); + payload = fnvlist_pack(nvl, &payload_len); + drr->drr_payloadlen = payload_len; + fnvlist_free(nvl); + } + + err = dump_record(dsp, payload, payload_len); + fnvlist_pack_free(payload, payload_len); + if (err != 0) { err = dsp->dsa_err; goto out; } @@ -859,19 +915,19 @@ dmu_send_obj(const char *pool, uint64_t is_clone = (fromds->ds_dir != ds->ds_dir); dsl_dataset_rele(fromds, FTAG); err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, - embedok, large_block_ok, outfd, vp, off); + embedok, large_block_ok, outfd, 0, 0, vp, off); } else { err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, - embedok, large_block_ok, outfd, vp, off); + embedok, large_block_ok, outfd, 0, 0, vp, off); } dsl_dataset_rele(ds, FTAG); return (err); } int -dmu_send(const char *tosnap, const char *fromsnap, - boolean_t embedok, boolean_t large_block_ok, - int outfd, vnode_t *vp, offset_t *off) +dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, + boolean_t large_block_ok, int outfd, uint64_t resumeobj, uint64_t resumeoff, + vnode_t *vp, offset_t *off) { dsl_pool_t *dp; dsl_dataset_t *ds; @@ -938,10 +994,12 @@ dmu_send(const char *tosnap, const char return (err); } err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, - embedok, large_block_ok, outfd, vp, off); + embedok, large_block_ok, + outfd, resumeobj, resumeoff, vp, off); } else { err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, - embedok, large_block_ok, outfd, vp, off); + embedok, large_block_ok, + outfd, resumeobj, resumeoff, vp, off); } if (owned) dsl_dataset_disown(ds, FTAG); @@ -1184,6 +1242,7 @@ dmu_recv_begin_check(void *arg, dmu_tx_t /* 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 || @@ -1196,6 +1255,10 @@ dmu_recv_begin_check(void *arg, dmu_tx_t 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 plan WRITE record, so the pool must have the @@ -1299,15 +1362,16 @@ dmu_recv_begin_sync(void *arg, dmu_tx_t { 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; dsl_dataset_t *ds, *newds; uint64_t dsobj; int error; - uint64_t crflags; + uint64_t crflags = 0; - crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? - DS_FLAG_CI_DATASET : 0; + if (drrb->drr_flags & DRR_FLAG_CI_DATA) + crflags |= DS_FLAG_CI_DATASET; error = dsl_dataset_hold(dp, tofs, FTAG, &ds); if (error == 0) { @@ -1345,6 +1409,31 @@ dmu_recv_begin_sync(void *arg, dmu_tx_t } VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); + 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 (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & + DMU_BACKUP_FEATURE_EMBED_DATA) { + VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, + 8, 1, &one, tx)); + } + } + dmu_buf_will_dirty(newds->ds_dbuf, tx); dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; @@ -1362,56 +1451,192 @@ dmu_recv_begin_sync(void *arg, dmu_tx_t 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; + 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_EMBED_DATA_LZ4) && + !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) + return (SET_ERROR(ENOTSUP)); + + char recvname[ZFS_MAXNAMELEN]; + + (void) snprintf(recvname, sizeof (recvname), "%s/%s", + tofs, recv_clone_name); + + if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { + /* %recv does not exist; continue in tofs */ + error = dsl_dataset_hold(dp, tofs, FTAG, &ds); + if (error != 0) + return (error); + } + + /* check that ds is marked inconsistent */ + if (!DS_IS_INCONSISTENT(ds)) { + dsl_dataset_rele(ds, 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(ds, 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(ds, 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(ds, 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(ds, 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(ds, FTAG); + return (SET_ERROR(EINVAL)); + } + + dsl_dataset_rele(ds, 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; + dsl_dataset_t *ds; + uint64_t dsobj; + char recvname[ZFS_MAXNAMELEN]; + + (void) snprintf(recvname, sizeof (recvname), "%s/%s", + tofs, recv_clone_name); + + if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { + /* %recv does not exist; continue in tofs */ + VERIFY0(dsl_dataset_hold(dp, tofs, 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(ds, FTAG); + + VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds)); + + dmu_buf_will_dirty(ds->ds_dbuf, tx); + dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; + + ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds))); + + 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, struct drr_begin *drrb, - boolean_t force, char *origin, dmu_recv_cookie_t *drc) +dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, + boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc) { dmu_recv_begin_arg_t drba = { 0 }; - dmu_replay_record_t *drr; bzero(drc, sizeof (dmu_recv_cookie_t)); - drc->drc_drrb = drrb; + 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(); - if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) + if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { drc->drc_byteswap = B_TRUE; - else if (drrb->drr_magic != DMU_BACKUP_MAGIC) - return (SET_ERROR(EINVAL)); - - drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); - drr->drr_type = DRR_BEGIN; - drr->drr_u.drr_begin = *drc->drc_drrb; - if (drc->drc_byteswap) { - fletcher_4_incremental_byteswap(drr, + fletcher_4_incremental_byteswap(drr_begin, sizeof (dmu_replay_record_t), &drc->drc_cksum); - } else { - fletcher_4_incremental_native(drr, + byteswap_record(drr_begin); + } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { + fletcher_4_incremental_native(drr_begin, sizeof (dmu_replay_record_t), &drc->drc_cksum); - } - kmem_free(drr, sizeof (dmu_replay_record_t)); - - if (drc->drc_byteswap) { - drrb->drr_magic = BSWAP_64(drrb->drr_magic); - drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); - drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); - drrb->drr_type = BSWAP_32(drrb->drr_type); - drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); - drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); + } else { + return (SET_ERROR(EINVAL)); } drba.drba_origin = origin; drba.drba_cookie = drc; drba.drba_cred = CRED(); - return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, - &drba, 5, ZFS_SPACE_CHECK_NORMAL)); + 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 { + return (dsl_sync_task(tofs, + dmu_recv_begin_check, dmu_recv_begin_sync, + &drba, 5, ZFS_SPACE_CHECK_NORMAL)); + } } struct receive_record_arg { @@ -1423,6 +1648,7 @@ struct receive_record_arg { */ arc_buf_t *write_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; }; @@ -1431,6 +1657,7 @@ 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. @@ -1438,15 +1665,20 @@ struct receive_writer_arg { 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; + uint64_t last_object, last_offset; + uint64_t bytes_read; /* bytes read when current record created */ }; 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. @@ -1518,14 +1750,21 @@ receive_read(struct receive_arg *ra, int ra->voff, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid); - if (resid == len - done) - ra->err = SET_ERROR(EINVAL); + 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); } @@ -1626,6 +1865,43 @@ deduce_nblkptr(dmu_object_type_t bonus_t } } +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; +} + static int receive_object(struct receive_writer_arg *rwa, struct drr_object *drro, void *data) @@ -1722,6 +1998,7 @@ receive_object(struct receive_writer_arg dmu_buf_rele(db, FTAG); } dmu_tx_commit(tx); + return (0); } @@ -1747,6 +2024,7 @@ receive_freeobjects(struct receive_write if (err != 0) return (err); } + return (0); } @@ -1761,6 +2039,18 @@ receive_write(struct receive_writer_arg !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 (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) return (SET_ERROR(EINVAL)); @@ -1784,8 +2074,17 @@ receive_write(struct receive_writer_arg if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) return (SET_ERROR(EINVAL)); dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); + + /* + * 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); dmu_buf_rele(bonus, FTAG); + return (0); } @@ -1844,43 +2143,48 @@ receive_write_byref(struct receive_write 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 *drrwnp, void *data) + struct drr_write_embedded *drrwe, void *data) { dmu_tx_t *tx; int err; - if (drrwnp->drr_offset + drrwnp->drr_length < drrwnp->drr_offset) + if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) return (EINVAL); - if (drrwnp->drr_psize > BPE_PAYLOAD_SIZE) + if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) return (EINVAL); - if (drrwnp->drr_etype >= NUM_BP_EMBEDDED_TYPES) + if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) return (EINVAL); - if (drrwnp->drr_compression >= ZIO_COMPRESS_FUNCTIONS) + if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) return (EINVAL); tx = dmu_tx_create(rwa->os); - dmu_tx_hold_write(tx, drrwnp->drr_object, - drrwnp->drr_offset, drrwnp->drr_length); + 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, drrwnp->drr_object, - drrwnp->drr_offset, data, drrwnp->drr_etype, - drrwnp->drr_compression, drrwnp->drr_lsize, drrwnp->drr_psize, + 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); } @@ -1954,10 +2258,16 @@ receive_free(struct receive_writer_arg * static void dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) { - char name[MAXNAMELEN]; - dsl_dataset_name(drc->drc_ds, name); - dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); - (void) dsl_destroy_head(name); + if (drc->drc_resumable) { + /* wait for our resume state to be written to disk */ + txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0); + dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); + } else { + char name[MAXNAMELEN]; + dsl_dataset_name(drc->drc_ds, name); + dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); + (void) dsl_destroy_head(name); + } } static void @@ -1984,12 +2294,17 @@ receive_read_payload_and_next_header(str if (len != 0) { ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); - ra->rrd->payload = buf; - ra->rrd->payload_size = len; - err = receive_read(ra, len, ra->rrd->payload); + err = receive_read(ra, len, buf); if (err != 0) return (err); - receive_cksum(ra, len, ra->rrd->payload); + 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; @@ -1997,6 +2312,7 @@ receive_read_payload_and_next_header(str 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; @@ -2176,7 +2492,7 @@ receive_read_record(struct receive_arg * { struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) - return (SET_ERROR(EINVAL)); + return (SET_ERROR(ECKSUM)); return (0); } case DRR_SPILL: @@ -2203,6 +2519,10 @@ receive_process_record(struct receive_wr { 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: { @@ -2297,6 +2617,33 @@ receive_writer_thread(void *arg) mutex_exit(&rwa->mutex); } +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 @@ -2317,11 +2664,19 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, struct receive_arg ra = { 0 }; struct receive_writer_arg rwa = { 0 }; int featureflags; + nvlist_t *begin_nvl = NULL; ra.byteswap = drc->drc_byteswap; 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); + } + list_create(&ra.ignore_obj_list, sizeof (struct receive_ign_obj_node), offsetof(struct receive_ign_obj_node, node)); @@ -2374,9 +2729,29 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, drc->drc_guid_to_ds_map = rwa.guid_to_ds_map; } - err = receive_read_payload_and_next_header(&ra, 0, NULL); - if (err) + uint32_t payloadlen = drc->drc_drr_begin->drr_payloadlen; + void *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; + } + + if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { + err = resume_check(&ra, begin_nvl); + if (err != 0) + goto out; + } (void) bqueue_init(&rwa.q, zfs_recv_queue_length, offsetof(struct receive_record_arg, node)); @@ -2384,6 +2759,7 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, mutex_init(&rwa.mutex, NULL, MUTEX_DEFAULT, NULL); rwa.os = ra.os; rwa.byteswap = drc->drc_byteswap; + rwa.resumable = drc->drc_resumable; (void) thread_create(NULL, 0, receive_writer_thread, &rwa, 0, curproc, TS_RUN, minclsyspri); @@ -2442,13 +2818,15 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, 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) { /* - * destroy what we created, so we don't leave it in the - * inconsistent restoring state. + * 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); } @@ -2608,6 +2986,20 @@ dmu_recv_end_sync(void *arg, dmu_tx_t *t 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; /* Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c Wed Oct 14 11:33:07 2015 (r289311) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c Wed Oct 14 11:36:55 2015 (r289312) @@ -47,6 +47,7 @@ typedef struct prefetch_data { int pd_flags; boolean_t pd_cancel; boolean_t pd_exited; + zbookmark_phys_t pd_resume; } prefetch_data_t; typedef struct traverse_data { @@ -311,33 +312,30 @@ traverse_visitbp(traverse_data_t *td, co ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); if (err != 0) *** DIFF OUTPUT TRUNCATED AT 1000 LINES *** _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
