diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c | 1030 |
1 files changed, 728 insertions, 302 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c index ed5afb4e1df5..55451fd931ad 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c @@ -19,8 +19,7 @@ * CDDL HEADER END */ /* - * Copyright 2009 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. */ #include <sys/dmu.h> @@ -33,14 +32,32 @@ #include <sys/dmu_traverse.h> #include <sys/dsl_dataset.h> #include <sys/dsl_dir.h> +#include <sys/dsl_prop.h> #include <sys/dsl_pool.h> #include <sys/dsl_synctask.h> #include <sys/zfs_ioctl.h> #include <sys/zap.h> #include <sys/zio_checksum.h> +#include <sys/zfs_znode.h> +#include <zfs_fletcher.h> +#include <sys/avl.h> +#include <sys/ddt.h> +#include <sys/zfs_onexit.h> static char *dmu_recv_tag = "dmu_recv_tag"; +/* + * The list of data whose inclusion in a send stream can be pending from + * one call to backup_cb to another. Multiple calls to dump_free() and + * dump_freeobjects() can be aggregated into a single DRR_FREE or + * DRR_FREEOBJECTS replay record. + */ +typedef enum { + PENDING_NONE, + PENDING_FREE, + PENDING_FREEOBJECTS +} pendop_t; + struct backuparg { dmu_replay_record_t *drr; kthread_t *td; @@ -48,7 +65,9 @@ struct backuparg { offset_t *off; objset_t *os; zio_cksum_t zc; + uint64_t toguid; int err; + pendop_t pending_op; }; static int @@ -56,11 +75,9 @@ dump_bytes(struct backuparg *ba, void *buf, int len) { struct uio auio; struct iovec aiov; - ASSERT3U(len % 8, ==, 0); fletcher_4_incremental_native(buf, len, &ba->zc); - aiov.iov_base = buf; aiov.iov_len = len; auio.uio_iov = &aiov; @@ -79,7 +96,6 @@ dump_bytes(struct backuparg *ba, void *buf, int len) ba->err = EOPNOTSUPP; #endif *ba->off += len; - return (ba->err); } @@ -87,29 +103,120 @@ static int dump_free(struct backuparg *ba, uint64_t object, uint64_t offset, uint64_t length) { - /* write a FREE record */ + struct drr_free *drrf = &(ba->drr->drr_u.drr_free); + + /* + * If there is a pending op, but it's not PENDING_FREE, push it out, + * since free block aggregation can only be done for blocks of the + * same type (i.e., DRR_FREE records can only be aggregated with + * other DRR_FREE records. DRR_FREEOBJECTS records can only be + * aggregated with other DRR_FREEOBJECTS records. + */ + if (ba->pending_op != PENDING_NONE && ba->pending_op != PENDING_FREE) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + + if (ba->pending_op == PENDING_FREE) { + /* + * There should never be a PENDING_FREE if length is -1 + * (because dump_dnode is the only place where this + * function is called with a -1, and only after flushing + * any pending record). + */ + ASSERT(length != -1ULL); + /* + * Check to see whether this free block can be aggregated + * with pending one. + */ + if (drrf->drr_object == object && drrf->drr_offset + + drrf->drr_length == offset) { + drrf->drr_length += length; + return (0); + } else { + /* not a continuation. Push out pending record */ + if (dump_bytes(ba, ba->drr, + sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + } + /* create a FREE record and make it pending */ bzero(ba->drr, sizeof (dmu_replay_record_t)); ba->drr->drr_type = DRR_FREE; - ba->drr->drr_u.drr_free.drr_object = object; - ba->drr->drr_u.drr_free.drr_offset = offset; - ba->drr->drr_u.drr_free.drr_length = length; + drrf->drr_object = object; + drrf->drr_offset = offset; + drrf->drr_length = length; + drrf->drr_toguid = ba->toguid; + if (length == -1ULL) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + } else { + ba->pending_op = PENDING_FREE; + } - if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t))) - return (EINTR); return (0); } static int dump_data(struct backuparg *ba, dmu_object_type_t type, - uint64_t object, uint64_t offset, int blksz, void *data) + uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) { + struct drr_write *drrw = &(ba->drr->drr_u.drr_write); + + + /* + * If there is any kind of pending aggregation (currently either + * a grouping of free objects or free blocks), push it out to + * the stream, since aggregation can't be done across operations + * of different types. + */ + if (ba->pending_op != PENDING_NONE) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } /* write a DATA record */ bzero(ba->drr, sizeof (dmu_replay_record_t)); ba->drr->drr_type = DRR_WRITE; - ba->drr->drr_u.drr_write.drr_object = object; - ba->drr->drr_u.drr_write.drr_type = type; - ba->drr->drr_u.drr_write.drr_offset = offset; - ba->drr->drr_u.drr_write.drr_length = blksz; + drrw->drr_object = object; + drrw->drr_type = type; + drrw->drr_offset = offset; + drrw->drr_length = blksz; + drrw->drr_toguid = ba->toguid; + drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); + if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) + drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; + DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); + DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); + DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); + drrw->drr_key.ddk_cksum = bp->blk_cksum; + + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + if (dump_bytes(ba, data, blksz) != 0) + return (EINTR); + return (0); +} + +static int +dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data) +{ + struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill); + + if (ba->pending_op != PENDING_NONE) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + + /* write a SPILL record */ + bzero(ba->drr, sizeof (dmu_replay_record_t)); + ba->drr->drr_type = DRR_SPILL; + drrs->drr_object = object; + drrs->drr_length = blksz; + drrs->drr_toguid = ba->toguid; if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t))) return (EINTR); @@ -121,39 +228,80 @@ dump_data(struct backuparg *ba, dmu_object_type_t type, static int dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs) { + struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects); + + /* + * If there is a pending op, but it's not PENDING_FREEOBJECTS, + * push it out, since free block aggregation can only be done for + * blocks of the same type (i.e., DRR_FREE records can only be + * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records + * can only be aggregated with other DRR_FREEOBJECTS records. + */ + if (ba->pending_op != PENDING_NONE && + ba->pending_op != PENDING_FREEOBJECTS) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + if (ba->pending_op == PENDING_FREEOBJECTS) { + /* + * See whether this free object array can be aggregated + * with pending one + */ + if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { + drrfo->drr_numobjs += numobjs; + return (0); + } else { + /* can't be aggregated. Push out pending record */ + if (dump_bytes(ba, ba->drr, + sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + } + /* write a FREEOBJECTS record */ bzero(ba->drr, sizeof (dmu_replay_record_t)); ba->drr->drr_type = DRR_FREEOBJECTS; - ba->drr->drr_u.drr_freeobjects.drr_firstobj = firstobj; - ba->drr->drr_u.drr_freeobjects.drr_numobjs = numobjs; + drrfo->drr_firstobj = firstobj; + drrfo->drr_numobjs = numobjs; + drrfo->drr_toguid = ba->toguid; + + ba->pending_op = PENDING_FREEOBJECTS; - if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t))) - return (EINTR); return (0); } static int dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp) { + struct drr_object *drro = &(ba->drr->drr_u.drr_object); + if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) return (dump_freeobjects(ba, object, 1)); + if (ba->pending_op != PENDING_NONE) { + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) + return (EINTR); + ba->pending_op = PENDING_NONE; + } + /* write an OBJECT record */ bzero(ba->drr, sizeof (dmu_replay_record_t)); ba->drr->drr_type = DRR_OBJECT; - ba->drr->drr_u.drr_object.drr_object = object; - ba->drr->drr_u.drr_object.drr_type = dnp->dn_type; - ba->drr->drr_u.drr_object.drr_bonustype = dnp->dn_bonustype; - ba->drr->drr_u.drr_object.drr_blksz = - dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; - ba->drr->drr_u.drr_object.drr_bonuslen = dnp->dn_bonuslen; - ba->drr->drr_u.drr_object.drr_checksum = dnp->dn_checksum; - ba->drr->drr_u.drr_object.drr_compress = dnp->dn_compress; - - if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t))) + drro->drr_object = object; + drro->drr_type = dnp->dn_type; + drro->drr_bonustype = dnp->dn_bonustype; + drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; + drro->drr_bonuslen = dnp->dn_bonuslen; + drro->drr_checksumtype = dnp->dn_checksum; + drro->drr_compress = dnp->dn_compress; + drro->drr_toguid = ba->toguid; + + if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0) return (EINTR); - if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8))) + if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) return (EINTR); /* free anything past the end of the file */ @@ -169,9 +317,10 @@ dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp) (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \ (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) +/* ARGSUSED */ static int -backup_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, - const dnode_phys_t *dnp, void *arg) +backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf, + const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) { struct backuparg *ba = arg; dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; @@ -180,9 +329,10 @@ backup_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, if (issig(JUSTLOOKING) && issig(FORREAL)) return (EINTR); - if (zb->zb_object != 0 && DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { + if (zb->zb_object != DMU_META_DNODE_OBJECT && + DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { return (0); - } else if (bp == NULL && zb->zb_object == 0) { + } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) { uint64_t span = BP_SPAN(dnp, zb->zb_level); uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT); @@ -198,7 +348,7 @@ backup_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, uint32_t aflags = ARC_WAIT; arc_buf_t *abuf; - if (arc_read_nolock(NULL, spa, bp, + if (dsl_read(NULL, spa, bp, pbuf, arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &aflags, zb) != 0) return (EIO); @@ -212,7 +362,7 @@ backup_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, break; } (void) arc_buf_remove_ref(abuf, &abuf); - } else { /* it's a level-0 block of a regular object */ + } else if (type == DMU_OT_SA) { uint32_t aflags = ARC_WAIT; arc_buf_t *abuf; int blksz = BP_GET_LSIZE(bp); @@ -222,8 +372,20 @@ backup_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb, ZIO_FLAG_CANFAIL, &aflags, zb) != 0) return (EIO); + err = dump_spill(ba, zb->zb_object, blksz, abuf->b_data); + (void) arc_buf_remove_ref(abuf, &abuf); + } else { /* it's a level-0 block of a regular object */ + uint32_t aflags = ARC_WAIT; + arc_buf_t *abuf; + int blksz = BP_GET_LSIZE(bp); + + if (dsl_read(NULL, spa, bp, pbuf, + arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ, + ZIO_FLAG_CANFAIL, &aflags, zb) != 0) + return (EIO); + err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz, - blksz, abuf->b_data); + blksz, bp, abuf->b_data); (void) arc_buf_remove_ref(abuf, &abuf); } @@ -235,8 +397,8 @@ int dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, struct file *fp, offset_t *off) { - dsl_dataset_t *ds = tosnap->os->os_dsl_dataset; - dsl_dataset_t *fromds = fromsnap ? fromsnap->os->os_dsl_dataset : NULL; + dsl_dataset_t *ds = tosnap->os_dsl_dataset; + dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL; dmu_replay_record_t *drr; struct backuparg ba; int err; @@ -273,10 +435,25 @@ dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); drr->drr_type = DRR_BEGIN; drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; - drr->drr_u.drr_begin.drr_version = DMU_BACKUP_STREAM_VERSION; + DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, + DMU_SUBSTREAM); + +#ifdef _KERNEL + if (dmu_objset_type(tosnap) == DMU_OST_ZFS) { + uint64_t version; + if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0) + return (EINVAL); + if (version == ZPL_VERSION_SA) { + DMU_SET_FEATUREFLAGS( + drr->drr_u.drr_begin.drr_versioninfo, + DMU_BACKUP_FEATURE_SA_SPILL); + } + } +#endif + drr->drr_u.drr_begin.drr_creation_time = ds->ds_phys->ds_creation_time; - drr->drr_u.drr_begin.drr_type = tosnap->os->os_phys->os_type; + drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type; if (fromorigin) drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid; @@ -297,9 +474,11 @@ dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, ba.fp = fp; ba.os = tosnap; ba.off = off; + ba.toguid = ds->ds_phys->ds_guid; ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0); + ba.pending_op = PENDING_NONE; - if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) { + if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) { kmem_free(drr, sizeof (dmu_replay_record_t)); return (ba.err); } @@ -307,6 +486,10 @@ dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH, backup_cb, &ba); + if (ba.pending_op != PENDING_NONE) + if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) + err = EINTR; + if (err) { if (err == EINTR && ba.err) err = ba.err; @@ -317,8 +500,9 @@ dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, bzero(drr, sizeof (dmu_replay_record_t)); drr->drr_type = DRR_END; drr->drr_u.drr_end.drr_checksum = ba.zc; + drr->drr_u.drr_end.drr_toguid = ba.toguid; - if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) { + if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) { kmem_free(drr, sizeof (dmu_replay_record_t)); return (ba.err); } @@ -339,33 +523,12 @@ struct recvbeginsyncarg { uint64_t dsflags; char clonelastname[MAXNAMELEN]; dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */ + cred_t *cr; }; -static dsl_dataset_t * -recv_full_sync_impl(dsl_pool_t *dp, uint64_t dsobj, dmu_objset_type_t type, - cred_t *cr, dmu_tx_t *tx) -{ - dsl_dataset_t *ds; - - /* This should always work, since we just created it */ - /* XXX - create should return an owned ds */ - VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, - DS_MODE_INCONSISTENT, dmu_recv_tag, &ds)); - - if (type != DMU_OST_NONE) { - (void) dmu_objset_create_impl(dp->dp_spa, - ds, &ds->ds_phys->ds_bp, type, tx); - } - - spa_history_internal_log(LOG_DS_REPLAY_FULL_SYNC, - dp->dp_spa, tx, cr, "dataset = %lld", dsobj); - - return (ds); -} - /* ARGSUSED */ static int -recv_full_check(void *arg1, void *arg2, dmu_tx_t *tx) +recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx) { dsl_dir_t *dd = arg1; struct recvbeginsyncarg *rbsa = arg2; @@ -383,7 +546,7 @@ recv_full_check(void *arg1, void *arg2, dmu_tx_t *tx) /* make sure it's a snap in the same pool */ if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool) return (EXDEV); - if (rbsa->origin->ds_phys->ds_num_children == 0) + if (!dsl_dataset_is_snapshot(rbsa->origin)) return (EINVAL); if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid) return (ENODEV); @@ -393,77 +556,31 @@ recv_full_check(void *arg1, void *arg2, dmu_tx_t *tx) } static void -recv_full_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) +recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx) { dsl_dir_t *dd = arg1; struct recvbeginsyncarg *rbsa = arg2; uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags; uint64_t dsobj; + /* Create and open new dataset. */ dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1, - rbsa->origin, flags, cr, tx); - - rbsa->ds = recv_full_sync_impl(dd->dd_pool, dsobj, - rbsa->origin ? DMU_OST_NONE : rbsa->type, cr, tx); -} + rbsa->origin, flags, rbsa->cr, tx); + VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj, + B_TRUE, dmu_recv_tag, &rbsa->ds)); -static int -recv_full_existing_check(void *arg1, void *arg2, dmu_tx_t *tx) -{ - dsl_dataset_t *ds = arg1; - struct recvbeginsyncarg *rbsa = arg2; - int err; - - /* must be a head ds */ - if (ds->ds_phys->ds_next_snap_obj != 0) - return (EINVAL); - - /* must not be a clone ds */ - if (dsl_dir_is_clone(ds->ds_dir)) - return (EINVAL); - - err = dsl_dataset_destroy_check(ds, rbsa->tag, tx); - if (err) - return (err); - - if (rbsa->origin) { - /* make sure it's a snap in the same pool */ - if (rbsa->origin->ds_dir->dd_pool != ds->ds_dir->dd_pool) - return (EXDEV); - if (rbsa->origin->ds_phys->ds_num_children == 0) - return (EINVAL); - if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid) - return (ENODEV); + if (rbsa->origin == NULL) { + (void) dmu_objset_create_impl(dd->dd_pool->dp_spa, + rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx); } - return (0); -} - -static void -recv_full_existing_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) -{ - dsl_dataset_t *ds = arg1; - struct recvbeginsyncarg *rbsa = arg2; - dsl_dir_t *dd = ds->ds_dir; - uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags; - uint64_t dsobj; - - /* - * NB: caller must provide an extra hold on the dsl_dir_t, so it - * won't go away when dsl_dataset_destroy_sync() closes the - * dataset. - */ - dsl_dataset_destroy_sync(ds, rbsa->tag, cr, tx); - - dsobj = dsl_dataset_create_sync_dd(dd, rbsa->origin, flags, tx); - - rbsa->ds = recv_full_sync_impl(dd->dd_pool, dsobj, - rbsa->origin ? DMU_OST_NONE : rbsa->type, cr, tx); + spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC, + dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj); } /* ARGSUSED */ static int -recv_incremental_check(void *arg1, void *arg2, dmu_tx_t *tx) +recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx) { dsl_dataset_t *ds = arg1; struct recvbeginsyncarg *rbsa = arg2; @@ -474,77 +591,105 @@ recv_incremental_check(void *arg1, void *arg2, dmu_tx_t *tx) if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds)) return (ETXTBSY); - /* must already be a snapshot of this fs */ - if (ds->ds_phys->ds_prev_snap_obj == 0) - return (ENODEV); - - /* most recent snapshot must match fromguid */ - if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) - return (ENODEV); - - /* temporary clone name must not exist */ + /* new snapshot name must not exist */ err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, - ds->ds_dir->dd_phys->dd_child_dir_zapobj, - rbsa->clonelastname, 8, 1, &val); + ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val); if (err == 0) return (EEXIST); if (err != ENOENT) return (err); - /* new snapshot name must not exist */ + if (rbsa->fromguid) { + /* if incremental, most recent snapshot must match fromguid */ + if (ds->ds_prev == NULL) + return (ENODEV); + + /* + * most recent snapshot must match fromguid, or there are no + * changes since the fromguid one + */ + if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) { + uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth; + uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj; + while (obj != 0) { + dsl_dataset_t *snap; + err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool, + obj, FTAG, &snap); + if (err) + return (ENODEV); + if (snap->ds_phys->ds_creation_txg < birth) { + dsl_dataset_rele(snap, FTAG); + return (ENODEV); + } + if (snap->ds_phys->ds_guid == rbsa->fromguid) { + dsl_dataset_rele(snap, FTAG); + break; /* it's ok */ + } + obj = snap->ds_phys->ds_prev_snap_obj; + dsl_dataset_rele(snap, FTAG); + } + if (obj == 0) + return (ENODEV); + } + } else { + /* if full, most recent snapshot must be $ORIGIN */ + if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL) + return (ENODEV); + } + + /* temporary clone name must not exist */ err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset, - ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val); + ds->ds_dir->dd_phys->dd_child_dir_zapobj, + rbsa->clonelastname, 8, 1, &val); if (err == 0) return (EEXIST); if (err != ENOENT) return (err); + return (0); } /* ARGSUSED */ static void -recv_online_incremental_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) +recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx) { dsl_dataset_t *ohds = arg1; struct recvbeginsyncarg *rbsa = arg2; dsl_pool_t *dp = ohds->ds_dir->dd_pool; - dsl_dataset_t *ods, *cds; + dsl_dataset_t *cds; uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags; uint64_t dsobj; - /* create the temporary clone */ - VERIFY(0 == dsl_dataset_hold_obj(dp, ohds->ds_phys->ds_prev_snap_obj, - FTAG, &ods)); - dsobj = dsl_dataset_create_sync(ohds->ds_dir, - rbsa->clonelastname, ods, flags, cr, tx); - dsl_dataset_rele(ods, FTAG); - - /* open the temporary clone */ - VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, - DS_MODE_INCONSISTENT, dmu_recv_tag, &cds)); + /* create and open the temporary clone */ + dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname, + ohds->ds_prev, flags, rbsa->cr, tx); + VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds)); - /* copy the refquota from the target fs to the clone */ - if (ohds->ds_quota > 0) - dsl_dataset_set_quota_sync(cds, &ohds->ds_quota, cr, tx); + /* + * If we actually created a non-clone, we need to create the + * objset in our new dataset. + */ + if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) { + (void) dmu_objset_create_impl(dp->dp_spa, + cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx); + } rbsa->ds = cds; - spa_history_internal_log(LOG_DS_REPLAY_INC_SYNC, - dp->dp_spa, tx, cr, "dataset = %lld", dsobj); + spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC, + dp->dp_spa, tx, "dataset = %lld", dsobj); } -/* ARGSUSED */ -static void -recv_offline_incremental_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) +static boolean_t +dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb) { - dsl_dataset_t *ds = arg1; + int featureflags; - dmu_buf_will_dirty(ds->ds_dbuf, tx); - ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; + featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); - spa_history_internal_log(LOG_DS_REPLAY_INC_SYNC, - ds->ds_dir->dd_pool->dp_spa, tx, cr, "dataset = %lld", - ds->ds_object); + /* Verify pool version supports SA if SA_SPILL feature set */ + return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && + (spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA)); } /* @@ -552,13 +697,13 @@ recv_offline_incremental_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) * 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, objset_t *origin, boolean_t online, dmu_recv_cookie_t *drc) +dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb, + boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc) { int err = 0; boolean_t byteswap; - struct recvbeginsyncarg rbsa; - uint64_t version; + struct recvbeginsyncarg rbsa = { 0 }; + uint64_t versioninfo; int flags; dsl_dataset_t *ds; @@ -571,22 +716,23 @@ dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, rbsa.tofs = tofs; rbsa.tosnap = tosnap; - rbsa.origin = origin ? origin->os->os_dsl_dataset : NULL; + rbsa.origin = origin ? origin->os_dsl_dataset : NULL; rbsa.fromguid = drrb->drr_fromguid; rbsa.type = drrb->drr_type; rbsa.tag = FTAG; rbsa.dsflags = 0; - version = drrb->drr_version; + rbsa.cr = CRED(); + versioninfo = drrb->drr_versioninfo; flags = drrb->drr_flags; if (byteswap) { rbsa.type = BSWAP_32(rbsa.type); rbsa.fromguid = BSWAP_64(rbsa.fromguid); - version = BSWAP_64(version); + versioninfo = BSWAP_64(versioninfo); flags = BSWAP_32(flags); } - if (version != DMU_BACKUP_STREAM_VERSION || + if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM || rbsa.type >= DMU_OST_NUMTYPES || ((flags & DRR_FLAG_CLONE) && origin == NULL)) return (EINVAL); @@ -597,102 +743,81 @@ dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, bzero(drc, sizeof (dmu_recv_cookie_t)); drc->drc_drrb = drrb; drc->drc_tosnap = tosnap; + drc->drc_top_ds = top_ds; drc->drc_force = force; /* * Process the begin in syncing context. */ - if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE) && !online) { - /* offline incremental receive */ - err = dsl_dataset_own(tofs, 0, dmu_recv_tag, &ds); - if (err) - return (err); - /* - * Only do the rollback if the most recent snapshot - * matches the incremental source - */ - if (force) { - if (ds->ds_prev == NULL || - ds->ds_prev->ds_phys->ds_guid != - rbsa.fromguid) { - dsl_dataset_disown(ds, dmu_recv_tag); - return (ENODEV); - } - (void) dsl_dataset_rollback(ds, DMU_OST_NONE); + /* open the dataset we are logically receiving into */ + err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds); + if (err == 0) { + if (dmu_recv_verify_features(ds, drrb)) { + dsl_dataset_rele(ds, dmu_recv_tag); + return (ENOTSUP); } - rbsa.force = B_FALSE; - err = dsl_sync_task_do(ds->ds_dir->dd_pool, - recv_incremental_check, - recv_offline_incremental_sync, ds, &rbsa, 1); - if (err) { - dsl_dataset_disown(ds, dmu_recv_tag); - return (err); + /* target fs already exists; recv into temp clone */ + + /* Can't recv a clone into an existing fs */ + if (flags & DRR_FLAG_CLONE) { + dsl_dataset_rele(ds, dmu_recv_tag); + return (EINVAL); + } + + /* must not have an incremental recv already in progress */ + if (!mutex_tryenter(&ds->ds_recvlock)) { + dsl_dataset_rele(ds, dmu_recv_tag); + return (EBUSY); } - drc->drc_logical_ds = drc->drc_real_ds = ds; - } else if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE)) { - /* online incremental receive */ /* tmp clone name is: tofs/%tosnap" */ (void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname), "%%%s", tosnap); - - /* open the dataset we are logically receiving into */ - err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds); - if (err) - return (err); - rbsa.force = force; err = dsl_sync_task_do(ds->ds_dir->dd_pool, - recv_incremental_check, - recv_online_incremental_sync, ds, &rbsa, 5); + recv_existing_check, recv_existing_sync, ds, &rbsa, 5); if (err) { + mutex_exit(&ds->ds_recvlock); dsl_dataset_rele(ds, dmu_recv_tag); return (err); } drc->drc_logical_ds = ds; drc->drc_real_ds = rbsa.ds; - } else { - /* create new fs -- full backup or clone */ - dsl_dir_t *dd = NULL; - const char *tail; + } else if (err == ENOENT) { + /* target fs does not exist; must be a full backup or clone */ + char *cp; - err = dsl_dir_open(tofs, FTAG, &dd, &tail); + /* + * If it's a non-clone incremental, we are missing the + * target fs, so fail the recv. + */ + if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE)) + return (ENOENT); + + /* Open the parent of tofs */ + cp = strrchr(tofs, '/'); + *cp = '\0'; + err = dsl_dataset_hold(tofs, FTAG, &ds); + *cp = '/'; if (err) return (err); - if (tail == NULL) { - if (!force) { - dsl_dir_close(dd, FTAG); - return (EEXIST); - } - - rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); - err = dsl_dataset_own_obj(dd->dd_pool, - dd->dd_phys->dd_head_dataset_obj, - DS_MODE_INCONSISTENT, FTAG, &ds); - rw_exit(&dd->dd_pool->dp_config_rwlock); - if (err) { - dsl_dir_close(dd, FTAG); - return (err); - } - dsl_dataset_make_exclusive(ds, FTAG); - err = dsl_sync_task_do(dd->dd_pool, - recv_full_existing_check, - recv_full_existing_sync, ds, &rbsa, 5); - dsl_dataset_disown(ds, FTAG); - } else { - err = dsl_sync_task_do(dd->dd_pool, recv_full_check, - recv_full_sync, dd, &rbsa, 5); + if (dmu_recv_verify_features(ds, drrb)) { + dsl_dataset_rele(ds, FTAG); + return (ENOTSUP); } - dsl_dir_close(dd, FTAG); + + err = dsl_sync_task_do(ds->ds_dir->dd_pool, + recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5); + dsl_dataset_rele(ds, FTAG); if (err) return (err); drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds; drc->drc_newfs = B_TRUE; } - return (0); + return (err); } struct restorearg { @@ -704,10 +829,100 @@ struct restorearg { uint64_t voff; int bufsize; /* amount of memory allocated for buf */ zio_cksum_t cksum; + avl_tree_t *guid_to_ds_map; }; +typedef struct guid_map_entry { + uint64_t guid; + dsl_dataset_t *gme_ds; + avl_node_t avlnode; +} guid_map_entry_t; + static int -restore_bytes(struct restorearg *ra, void *buf, int len, off_t off, int *resid) +guid_compare(const void *arg1, const void *arg2) +{ + const guid_map_entry_t *gmep1 = arg1; + const guid_map_entry_t *gmep2 = arg2; + + if (gmep1->guid < gmep2->guid) + return (-1); + else if (gmep1->guid > gmep2->guid) + return (1); + return (0); +} + +/* + * This function is a callback used by dmu_objset_find() (which + * enumerates the object sets) to build an avl tree that maps guids + * to datasets. The resulting table is used when processing DRR_WRITE_BYREF + * send stream records. These records, which are used in dedup'ed + * streams, do not contain data themselves, but refer to a copy + * of the data block that has already been written because it was + * earlier in the stream. That previous copy is identified by the + * guid of the dataset with the referenced data. + */ +int +find_ds_by_guid(const char *name, void *arg) +{ + avl_tree_t *guid_map = arg; + dsl_dataset_t *ds, *snapds; + guid_map_entry_t *gmep; + dsl_pool_t *dp; + int err; + uint64_t lastobj, firstobj; + + if (dsl_dataset_hold(name, FTAG, &ds) != 0) + return (0); + + dp = ds->ds_dir->dd_pool; + rw_enter(&dp->dp_config_rwlock, RW_READER); + firstobj = ds->ds_dir->dd_phys->dd_origin_obj; + lastobj = ds->ds_phys->ds_prev_snap_obj; + + while (lastobj != firstobj) { + err = dsl_dataset_hold_obj(dp, lastobj, guid_map, &snapds); + if (err) { + /* + * Skip this snapshot and move on. It's not + * clear why this would ever happen, but the + * remainder of the snapshot streadm can be + * processed. + */ + rw_exit(&dp->dp_config_rwlock); + dsl_dataset_rele(ds, FTAG); + return (0); + } + + gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP); + gmep->guid = snapds->ds_phys->ds_guid; + gmep->gme_ds = snapds; + avl_add(guid_map, gmep); + lastobj = snapds->ds_phys->ds_prev_snap_obj; + } + + rw_exit(&dp->dp_config_rwlock); + dsl_dataset_rele(ds, FTAG); + + return (0); +} + +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) { + dsl_dataset_rele(gmep->gme_ds, ca); + kmem_free(gmep, sizeof (guid_map_entry_t)); + } + avl_destroy(ca); + kmem_free(ca, sizeof (avl_tree_t)); +} + +static int +restore_bytes(struct restorearg *ra, void *buf, int len, off_t off, ssize_t *resid) { struct uio auio; struct iovec aiov; @@ -742,7 +957,7 @@ restore_read(struct restorearg *ra, int len) ASSERT3U(len % 8, ==, 0); while (done < len) { - int resid; + ssize_t resid; ra->err = restore_bytes(ra, (caddr_t)ra->buf + done, len - done, ra->voff, &resid); @@ -774,7 +989,7 @@ backup_byteswap(dmu_replay_record_t *drr) switch (drr->drr_type) { case DRR_BEGIN: DO64(drr_begin.drr_magic); - DO64(drr_begin.drr_version); + DO64(drr_begin.drr_versioninfo); DO64(drr_begin.drr_creation_time); DO32(drr_begin.drr_type); DO32(drr_begin.drr_flags); @@ -788,27 +1003,56 @@ backup_byteswap(dmu_replay_record_t *drr) DO32(drr_object.drr_bonustype); DO32(drr_object.drr_blksz); DO32(drr_object.drr_bonuslen); + DO64(drr_object.drr_toguid); 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_length); + DO64(drr_write.drr_toguid); + DO64(drr_write.drr_key.ddk_cksum.zc_word[0]); + DO64(drr_write.drr_key.ddk_cksum.zc_word[1]); + DO64(drr_write.drr_key.ddk_cksum.zc_word[2]); + DO64(drr_write.drr_key.ddk_cksum.zc_word[3]); + DO64(drr_write.drr_key.ddk_prop); + 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); + DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]); + DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]); + DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]); + DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]); + DO64(drr_write_byref.drr_key.ddk_prop); 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); break; case DRR_END: DO64(drr_end.drr_checksum.zc_word[0]); DO64(drr_end.drr_checksum.zc_word[1]); DO64(drr_end.drr_checksum.zc_word[2]); DO64(drr_end.drr_checksum.zc_word[3]); + DO64(drr_end.drr_toguid); break; } #undef DO64 @@ -825,7 +1069,7 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) if (drro->drr_type == DMU_OT_NONE || drro->drr_type >= DMU_OT_NUMTYPES || drro->drr_bonustype >= DMU_OT_NUMTYPES || - drro->drr_checksum >= ZIO_CHECKSUM_FUNCTIONS || + drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || drro->drr_blksz < SPA_MINBLOCKSIZE || @@ -864,8 +1108,9 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) drro->drr_type, drro->drr_blksz, drro->drr_bonustype, drro->drr_bonuslen); } - if (err) + if (err) { return (EINVAL); + } tx = dmu_tx_create(os); dmu_tx_hold_bonus(tx, drro->drr_object); @@ -875,7 +1120,8 @@ restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) return (err); } - dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksum, tx); + dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype, + tx); dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx); if (data != NULL) { @@ -957,6 +1203,114 @@ restore_write(struct restorearg *ra, objset_t *os, 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 +restore_write_byref(struct restorearg *ra, objset_t *os, + 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; + dmu_buf_t *dbp; + + if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) + return (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(ra->guid_to_ds_map, &gmesrch, + &where)) == NULL) { + return (EINVAL); + } + if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) + return (EINVAL); + } else { + ref_os = os; + } + + if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, + drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH)) + return (err); + + tx = dmu_tx_create(os); + + dmu_tx_hold_write(tx, drrwbr->drr_object, + drrwbr->drr_offset, drrwbr->drr_length); + err = dmu_tx_assign(tx, TXG_WAIT); + if (err) { + dmu_tx_abort(tx); + return (err); + } + dmu_write(os, drrwbr->drr_object, + drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); + dmu_buf_rele(dbp, FTAG); + dmu_tx_commit(tx); + return (0); +} + +static int +restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs) +{ + dmu_tx_t *tx; + void *data; + dmu_buf_t *db, *db_spill; + int err; + + if (drrs->drr_length < SPA_MINBLOCKSIZE || + drrs->drr_length > SPA_MAXBLOCKSIZE) + return (EINVAL); + + data = restore_read(ra, drrs->drr_length); + if (data == NULL) + return (ra->err); + + if (dmu_object_info(os, drrs->drr_object, NULL) != 0) + return (EINVAL); + + VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db)); + if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { + dmu_buf_rele(db, FTAG); + return (err); + } + + tx = dmu_tx_create(os); + + dmu_tx_hold_spill(tx, db->db_object); + + err = dmu_tx_assign(tx, TXG_WAIT); + if (err) { + dmu_buf_rele(db, FTAG); + dmu_buf_rele(db_spill, FTAG); + dmu_tx_abort(tx); + return (err); + } + dmu_buf_will_dirty(db_spill, tx); + + if (db_spill->db_size < drrs->drr_length) + VERIFY(0 == dbuf_spill_set_blksz(db_spill, + drrs->drr_length, tx)); + bcopy(data, db_spill->db_data, drrs->drr_length); + + dmu_buf_rele(db, FTAG); + dmu_buf_rele(db_spill, FTAG); + + dmu_tx_commit(tx); + return (0); +} + /* ARGSUSED */ static int restore_free(struct restorearg *ra, objset_t *os, @@ -976,37 +1330,18 @@ restore_free(struct restorearg *ra, objset_t *os, return (err); } -void -dmu_recv_abort_cleanup(dmu_recv_cookie_t *drc) -{ - if (drc->drc_newfs || drc->drc_real_ds != drc->drc_logical_ds) { - /* - * online incremental or new fs: destroy the fs (which - * may be a clone) that we created - */ - (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag); - if (drc->drc_real_ds != drc->drc_logical_ds) - dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag); - } else { - /* - * offline incremental: rollback to most recent snapshot. - */ - (void) dsl_dataset_rollback(drc->drc_real_ds, DMU_OST_NONE); - dsl_dataset_disown(drc->drc_real_ds, dmu_recv_tag); - } -} - /* * NB: callers *must* call dmu_recv_end() if this succeeds. */ int -dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp) +dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp, + int cleanup_fd, uint64_t *action_handlep) { - kthread_t *td = curthread; struct restorearg ra = { 0 }; dmu_replay_record_t *drr; objset_t *os; zio_cksum_t pcksum; + int featureflags; if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) ra.byteswap = TRUE; @@ -1031,30 +1366,69 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp) if (ra.byteswap) { struct drr_begin *drrb = drc->drc_drrb; drrb->drr_magic = BSWAP_64(drrb->drr_magic); - drrb->drr_version = BSWAP_64(drrb->drr_version); + 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); } - ra.td = td; + ra.td = curthread; ra.fp = fp; ra.voff = *voffp; ra.bufsize = 1<<20; ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP); /* these were verified in dmu_recv_begin */ - ASSERT(drc->drc_drrb->drr_version == DMU_BACKUP_STREAM_VERSION); + ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) == + DMU_SUBSTREAM); ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES); /* * Open the objset we are modifying. */ - VERIFY(dmu_objset_open_ds(drc->drc_real_ds, DMU_OST_ANY, &os) == 0); + VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0); ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT); + featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); + + /* 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) { + ra.err = EBADF; + goto out; + } + ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); + if (ra.err) { + cleanup_fd = -1; + goto out; + } + + if (*action_handlep == 0) { + ra.guid_to_ds_map = + kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); + avl_create(ra.guid_to_ds_map, guid_compare, + sizeof (guid_map_entry_t), + offsetof(guid_map_entry_t, avlnode)); + (void) dmu_objset_find(drc->drc_top_ds, find_ds_by_guid, + (void *)ra.guid_to_ds_map, + DS_FIND_CHILDREN); + ra.err = zfs_onexit_add_cb(minor, + free_guid_map_onexit, ra.guid_to_ds_map, + action_handlep); + if (ra.err) + goto out; + } else { + ra.err = zfs_onexit_cb_data(minor, *action_handlep, + (void **)&ra.guid_to_ds_map); + if (ra.err) + goto out; + } + } + /* * Read records and process them. */ @@ -1094,6 +1468,13 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp) ra.err = restore_write(&ra, os, &drrw); break; } + case DRR_WRITE_BYREF: + { + struct drr_write_byref drrwbr = + drr->drr_u.drr_write_byref; + ra.err = restore_write_byref(&ra, os, &drrwbr); + break; + } case DRR_FREE: { struct drr_free drrf = drr->drr_u.drr_free; @@ -1112,6 +1493,12 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp) ra.err = ECKSUM; goto out; } + case DRR_SPILL: + { + struct drr_spill drrs = drr->drr_u.drr_spill; + ra.err = restore_spill(&ra, os, &drrs); + break; + } default: ra.err = EINVAL; goto out; @@ -1121,15 +1508,22 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp) ASSERT(ra.err != 0); out: - dmu_objset_close(os); + if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) + zfs_onexit_fd_rele(cleanup_fd); if (ra.err != 0) { /* - * rollback or destroy what we created, so we don't - * leave it in the restoring state. + * destroy what we created, so we don't leave it in the + * inconsistent restoring state. */ txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0); - dmu_recv_abort_cleanup(drc); + + (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, + B_FALSE); + if (drc->drc_real_ds != drc->drc_logical_ds) { + mutex_exit(&drc->drc_logical_ds->ds_recvlock); + dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag); + } } kmem_free(ra.buf, ra.bufsize); @@ -1153,12 +1547,12 @@ recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx) } static void -recv_end_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) +recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx) { dsl_dataset_t *ds = arg1; struct recvendsyncarg *resa = arg2; - dsl_dataset_snapshot_sync(ds, resa->tosnap, cr, tx); + dsl_dataset_snapshot_sync(ds, resa->tosnap, tx); /* set snapshot's creation time and guid */ dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); @@ -1170,35 +1564,31 @@ recv_end_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; } -int -dmu_recv_end(dmu_recv_cookie_t *drc) +static int +dmu_recv_existing_end(dmu_recv_cookie_t *drc) { struct recvendsyncarg resa; dsl_dataset_t *ds = drc->drc_logical_ds; int err; /* - * XXX hack; seems the ds is still dirty and - * dsl_pool_zil_clean() expects it to have a ds_user_ptr - * (and zil), but clone_swap() can close it. + * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean() + * expects it to have a ds_user_ptr (and zil), but clone_swap() + * can close it. */ txg_wait_synced(ds->ds_dir->dd_pool, 0); - if (ds != drc->drc_real_ds) { - /* we are doing an online recv */ - if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) { - err = dsl_dataset_clone_swap(drc->drc_real_ds, ds, - drc->drc_force); - if (err) - dsl_dataset_disown(ds, dmu_recv_tag); - } else { - err = EBUSY; - dsl_dataset_rele(ds, dmu_recv_tag); - } - /* dsl_dataset_destroy() will disown the ds */ - (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag); + if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) { + err = dsl_dataset_clone_swap(drc->drc_real_ds, ds, + drc->drc_force); if (err) - return (err); + goto out; + } else { + mutex_exit(&ds->ds_recvlock); + dsl_dataset_rele(ds, dmu_recv_tag); + (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, + B_FALSE); + return (EBUSY); } resa.creation_time = drc->drc_drrb->drr_creation_time; @@ -1208,16 +1598,52 @@ dmu_recv_end(dmu_recv_cookie_t *drc) err = dsl_sync_task_do(ds->ds_dir->dd_pool, recv_end_check, recv_end_sync, ds, &resa, 3); if (err) { - if (drc->drc_newfs) { - ASSERT(ds == drc->drc_real_ds); - (void) dsl_dataset_destroy(ds, dmu_recv_tag); - return (err); - } else { - (void) dsl_dataset_rollback(ds, DMU_OST_NONE); - } + /* swap back */ + (void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE); } - /* release the hold from dmu_recv_begin */ +out: + mutex_exit(&ds->ds_recvlock); dsl_dataset_disown(ds, dmu_recv_tag); + (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE); return (err); } + +static int +dmu_recv_new_end(dmu_recv_cookie_t *drc) +{ + struct recvendsyncarg resa; + dsl_dataset_t *ds = drc->drc_logical_ds; + int err; + + /* + * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean() + * expects it to have a ds_user_ptr (and zil), but clone_swap() + * can close it. + */ + txg_wait_synced(ds->ds_dir->dd_pool, 0); + + resa.creation_time = drc->drc_drrb->drr_creation_time; + resa.toguid = drc->drc_drrb->drr_toguid; + resa.tosnap = drc->drc_tosnap; + + err = dsl_sync_task_do(ds->ds_dir->dd_pool, + recv_end_check, recv_end_sync, ds, &resa, 3); + if (err) { + /* clean up the fs we just recv'd into */ + (void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE); + } else { + /* release the hold from dmu_recv_begin */ + dsl_dataset_disown(ds, dmu_recv_tag); + } + return (err); +} + +int +dmu_recv_end(dmu_recv_cookie_t *drc) +{ + if (drc->drc_logical_ds != drc->drc_real_ds) + return (dmu_recv_existing_end(drc)); + else + return (dmu_recv_new_end(drc)); +} |