* 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.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
+ * Copyright (c) 2012, Joyent, Inc. All rights reserved.
*/
#include <sys/dmu.h>
#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/spa_impl.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>
+
+/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
+int zfs_send_corrupt_data = B_FALSE;
static char *dmu_recv_tag = "dmu_recv_tag";
-struct backuparg {
- dmu_replay_record_t *drr;
- vnode_t *vp;
- offset_t *off;
- objset_t *os;
- zio_cksum_t zc;
- int err;
-};
+typedef struct dump_bytes_io {
+ dmu_sendarg_t *dbi_dsp;
+ void *dbi_buf;
+ int dbi_len;
+} dump_bytes_io_t;
-static int
-dump_bytes(struct backuparg *ba, void *buf, int len)
+static void
+dump_bytes_strategy(void *arg)
{
+ dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg;
+ dmu_sendarg_t *dsp = dbi->dbi_dsp;
+ dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
ssize_t resid; /* have to get resid to get detailed errno */
- ASSERT3U(len % 8, ==, 0);
+ ASSERT0(dbi->dbi_len % 8);
- fletcher_4_incremental_native(buf, len, &ba->zc);
- ba->err = vn_rdwr(UIO_WRITE, ba->vp,
- (caddr_t)buf, len,
+ fletcher_4_incremental_native(dbi->dbi_buf, dbi->dbi_len, &dsp->dsa_zc);
+ dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
+ (caddr_t)dbi->dbi_buf, dbi->dbi_len,
0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
- *ba->off += len;
- return (ba->err);
+
+ mutex_enter(&ds->ds_sendstream_lock);
+ *dsp->dsa_off += dbi->dbi_len;
+ mutex_exit(&ds->ds_sendstream_lock);
}
static int
-dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
+dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
+{
+ dump_bytes_io_t dbi;
+
+ dbi.dbi_dsp = dsp;
+ dbi.dbi_buf = buf;
+ dbi.dbi_len = len;
+
+ /*
+ * The vn_rdwr() call is performed in a taskq to ensure that there is
+ * always enough stack space to write safely to the target filesystem.
+ * The ZIO_TYPE_FREE threads are used because there can be a lot of
+ * them and they are used in vdev_file.c for a similar purpose.
+ */
+ spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE,
+ ZIO_TASKQ_ISSUE, dump_bytes_strategy, &dbi, TQ_SLEEP);
+
+ return (dsp->dsa_err);
+}
+
+static int
+dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
uint64_t length)
{
- /* write a FREE record */
- 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;
-
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
- return (EINTR);
+ struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free);
+
+ if (length != -1ULL && offset + length < offset)
+ length = -1ULL;
+
+ /*
+ * 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 (dsp->dsa_pending_op != PENDING_NONE &&
+ dsp->dsa_pending_op != PENDING_FREE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_pending_op = PENDING_NONE;
+ }
+
+ if (dsp->dsa_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(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_pending_op = PENDING_NONE;
+ }
+ }
+ /* create a FREE record and make it pending */
+ bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
+ dsp->dsa_drr->drr_type = DRR_FREE;
+ drrf->drr_object = object;
+ drrf->drr_offset = offset;
+ drrf->drr_length = length;
+ drrf->drr_toguid = dsp->dsa_toguid;
+ if (length == -1ULL) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ } else {
+ dsp->dsa_pending_op = PENDING_FREE;
+ }
+
return (0);
}
static int
-dump_data(struct backuparg *ba, dmu_object_type_t type,
- uint64_t object, uint64_t offset, int blksz, void *data)
+dump_data(dmu_sendarg_t *dsp, dmu_object_type_t type,
+ uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
{
+ struct drr_write *drrw = &(dsp->dsa_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 (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_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;
-
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
+ bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
+ dsp->dsa_drr->drr_type = DRR_WRITE;
+ drrw->drr_object = object;
+ drrw->drr_type = type;
+ drrw->drr_offset = offset;
+ drrw->drr_length = blksz;
+ drrw->drr_toguid = dsp->dsa_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(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- if (dump_bytes(ba, data, blksz))
+ if (dump_bytes(dsp, data, blksz) != 0)
return (EINTR);
return (0);
}
static int
-dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
+dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data)
{
- /* 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;
+ struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
+
+ if (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_pending_op = PENDING_NONE;
+ }
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
+ /* write a SPILL record */
+ bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
+ dsp->dsa_drr->drr_type = DRR_SPILL;
+ drrs->drr_object = object;
+ drrs->drr_length = blksz;
+ drrs->drr_toguid = dsp->dsa_toguid;
+
+ if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)))
+ return (EINTR);
+ if (dump_bytes(dsp, data, blksz))
return (EINTR);
return (0);
}
static int
-dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
+dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
+{
+ struct drr_freeobjects *drrfo = &(dsp->dsa_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 (dsp->dsa_pending_op != PENDING_NONE &&
+ dsp->dsa_pending_op != PENDING_FREEOBJECTS) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_pending_op = PENDING_NONE;
+ }
+ if (dsp->dsa_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(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_pending_op = PENDING_NONE;
+ }
+ }
+
+ /* write a FREEOBJECTS record */
+ bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
+ dsp->dsa_drr->drr_type = DRR_FREEOBJECTS;
+ drrfo->drr_firstobj = firstobj;
+ drrfo->drr_numobjs = numobjs;
+ drrfo->drr_toguid = dsp->dsa_toguid;
+
+ dsp->dsa_pending_op = PENDING_FREEOBJECTS;
+
+ return (0);
+}
+
+static int
+dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp)
{
+ struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
+
if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
- return (dump_freeobjects(ba, object, 1));
+ return (dump_freeobjects(dsp, object, 1));
+
+ if (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
+ return (EINTR);
+ dsp->dsa_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)))
+ bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
+ dsp->dsa_drr->drr_type = DRR_OBJECT;
+ 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 = dsp->dsa_toguid;
+
+ if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)))
+ if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
return (EINTR);
/* free anything past the end of the file */
- if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
+ if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
(dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
return (EINTR);
- if (ba->err)
+ if (dsp->dsa_err)
return (EINTR);
return (0);
}
(((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,
+ const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
{
- struct backuparg *ba = arg;
+ dmu_sendarg_t *dsp = arg;
dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
int err = 0;
if (issig(JUSTLOOKING) && issig(FORREAL))
return (EINTR);
- if (bp == NULL && zb->zb_object == 0) {
+ if (zb->zb_object != DMU_META_DNODE_OBJECT &&
+ DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
+ return (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);
+ err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT);
} else if (bp == NULL) {
uint64_t span = BP_SPAN(dnp, zb->zb_level);
- err = dump_free(ba, zb->zb_object, zb->zb_blkid * span, span);
+ err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span);
} else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
return (0);
} else if (type == DMU_OT_DNODE) {
uint32_t aflags = ARC_WAIT;
arc_buf_t *abuf;
- if (arc_read_nolock(NULL, spa, bp,
- arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+ if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
+ ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
+ &aflags, zb) != 0)
return (EIO);
blk = abuf->b_data;
for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
uint64_t dnobj = (zb->zb_blkid <<
(DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
- err = dump_dnode(ba, dnobj, blk+i);
+ err = dump_dnode(dsp, dnobj, blk+i);
if (err)
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);
- if (arc_read_nolock(NULL, spa, bp,
- arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+ if (arc_read(NULL, spa, bp, 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);
+ err = dump_spill(dsp, 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 (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
+ ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
+ &aflags, zb) != 0) {
+ if (zfs_send_corrupt_data) {
+ uint64_t *ptr;
+ /* Send a block filled with 0x"zfs badd bloc" */
+ abuf = arc_buf_alloc(spa, blksz, &abuf,
+ ARC_BUFC_DATA);
+ for (ptr = abuf->b_data;
+ (char *)ptr < (char *)abuf->b_data + blksz;
+ ptr++)
+ *ptr = 0x2f5baddb10cULL;
+ } else {
+ return (EIO);
+ }
+ }
+
+ err = dump_data(dsp, type, zb->zb_object, zb->zb_blkid * blksz,
+ blksz, bp, abuf->b_data);
(void) arc_buf_remove_ref(abuf, &abuf);
}
}
int
-dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
- vnode_t *vp, offset_t *off)
+dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
+ int outfd, vnode_t *vp, 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;
+ dmu_sendarg_t *dsp;
int err;
uint64_t fromtxg = 0;
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) {
+ kmem_free(drr, sizeof (dmu_replay_record_t));
+ 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;
if (fromorigin)
dsl_dataset_rele(fromds, FTAG);
- ba.drr = drr;
- ba.vp = vp;
- ba.os = tosnap;
- ba.off = off;
- ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
-
- if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) {
- kmem_free(drr, sizeof (dmu_replay_record_t));
- return (ba.err);
+ dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP);
+
+ dsp->dsa_drr = drr;
+ dsp->dsa_vp = vp;
+ dsp->dsa_outfd = outfd;
+ dsp->dsa_proc = curproc;
+ dsp->dsa_os = tosnap;
+ dsp->dsa_off = off;
+ dsp->dsa_toguid = ds->ds_phys->ds_guid;
+ ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0);
+ dsp->dsa_pending_op = PENDING_NONE;
+
+ mutex_enter(&ds->ds_sendstream_lock);
+ list_insert_head(&ds->ds_sendstreams, dsp);
+ mutex_exit(&ds->ds_sendstream_lock);
+
+ if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
+ err = dsp->dsa_err;
+ goto out;
}
err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
- backup_cb, &ba);
+ backup_cb, dsp);
+
+ if (dsp->dsa_pending_op != PENDING_NONE)
+ if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0)
+ err = EINTR;
if (err) {
- if (err == EINTR && ba.err)
- err = ba.err;
- kmem_free(drr, sizeof (dmu_replay_record_t));
- return (err);
+ if (err == EINTR && dsp->dsa_err)
+ err = dsp->dsa_err;
+ goto out;
}
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_checksum = dsp->dsa_zc;
+ drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid;
- if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) {
- kmem_free(drr, sizeof (dmu_replay_record_t));
- return (ba.err);
+ if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
+ err = dsp->dsa_err;
+ goto out;
}
+out:
+ mutex_enter(&ds->ds_sendstream_lock);
+ list_remove(&ds->ds_sendstreams, dsp);
+ mutex_exit(&ds->ds_sendstream_lock);
+
kmem_free(drr, sizeof (dmu_replay_record_t));
+ kmem_free(dsp, sizeof (dmu_sendarg_t));
+
+ return (err);
+}
+
+int
+dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
+ uint64_t *sizep)
+{
+ dsl_dataset_t *ds = tosnap->os_dsl_dataset;
+ dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
+ dsl_pool_t *dp = ds->ds_dir->dd_pool;
+ int err;
+ uint64_t size, recordsize;
+
+ /* tosnap must be a snapshot */
+ if (ds->ds_phys->ds_next_snap_obj == 0)
+ return (EINVAL);
+
+ /* fromsnap must be an earlier snapshot from the same fs as tosnap */
+ if (fromds && (ds->ds_dir != fromds->ds_dir ||
+ fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
+ return (EXDEV);
+
+ if (fromorigin) {
+ if (fromsnap)
+ return (EINVAL);
+
+ if (dsl_dir_is_clone(ds->ds_dir)) {
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_dataset_hold_obj(dp,
+ ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
+ rw_exit(&dp->dp_config_rwlock);
+ if (err)
+ return (err);
+ } else {
+ fromorigin = B_FALSE;
+ }
+ }
+
+ /* Get uncompressed size estimate of changed data. */
+ if (fromds == NULL) {
+ size = ds->ds_phys->ds_uncompressed_bytes;
+ } else {
+ uint64_t used, comp;
+ err = dsl_dataset_space_written(fromds, ds,
+ &used, &comp, &size);
+ if (fromorigin)
+ dsl_dataset_rele(fromds, FTAG);
+ if (err)
+ return (err);
+ }
+
+ /*
+ * Assume that space (both on-disk and in-stream) is dominated by
+ * data. We will adjust for indirect blocks and the copies property,
+ * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
+ */
+
+ /*
+ * Subtract out approximate space used by indirect blocks.
+ * Assume most space is used by data blocks (non-indirect, non-dnode).
+ * Assume all blocks are recordsize. Assume ditto blocks and
+ * internal fragmentation counter out compression.
+ *
+ * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
+ * block, which we observe in practice.
+ */
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_prop_get_ds(ds, "recordsize",
+ sizeof (recordsize), 1, &recordsize, NULL);
+ rw_exit(&dp->dp_config_rwlock);
+ if (err)
+ return (err);
+ size -= size / recordsize * sizeof (blkptr_t);
+
+ /* Add in the space for the record associated with each block. */
+ size += size / recordsize * sizeof (dmu_replay_record_t);
+
+ *sizep = size;
return (0);
}
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;
/* 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);
}
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);
-}
-
-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);
+ rbsa->origin, flags, rbsa->cr, tx);
+ VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
+ B_TRUE, dmu_recv_tag, &rbsa->ds));
- 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;
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));
}
/*
* 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;
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);
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 {
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
+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);
+}
+
+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 void *
restore_read(struct restorearg *ra, int len)
{
int done = 0;
/* some things will require 8-byte alignment, so everything must */
- ASSERT3U(len % 8, ==, 0);
+ ASSERT0(len % 8);
while (done < len) {
ssize_t resid;
return (rv);
}
-static void
+noinline static void
backup_byteswap(dmu_replay_record_t *drr)
{
#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
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);
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;
+ default:
break;
}
#undef DO64
#undef DO32
}
-static int
+noinline static int
restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
{
int err;
dmu_tx_t *tx;
void *data = NULL;
- err = dmu_object_info(os, drro->drr_object, NULL);
-
- if (err != 0 && err != ENOENT)
- return (EINVAL);
-
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 ||
+ !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 ||
return (EINVAL);
}
+ err = dmu_object_info(os, drro->drr_object, NULL);
+
+ if (err != 0 && err != ENOENT)
+ return (EINVAL);
+
if (drro->drr_bonuslen) {
data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
if (ra->err)
return (ra->err);
}
- tx = dmu_tx_create(os);
-
if (err == ENOENT) {
/* currently free, want to be allocated */
+ tx = dmu_tx_create(os);
dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 1);
err = dmu_tx_assign(tx, TXG_WAIT);
if (err) {
dmu_tx_abort(tx);
err = dmu_object_claim(os, drro->drr_object,
drro->drr_type, drro->drr_blksz,
drro->drr_bonustype, drro->drr_bonuslen, tx);
+ dmu_tx_commit(tx);
} else {
/* currently allocated, want to be allocated */
- dmu_tx_hold_bonus(tx, drro->drr_object);
- /*
- * We may change blocksize and delete old content,
- * so need to hold_write and hold_free.
- */
- dmu_tx_hold_write(tx, drro->drr_object, 0, 1);
- dmu_tx_hold_free(tx, drro->drr_object, 0, DMU_OBJECT_END);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err) {
- dmu_tx_abort(tx);
- return (err);
- }
-
err = dmu_object_reclaim(os, drro->drr_object,
drro->drr_type, drro->drr_blksz,
- drro->drr_bonustype, drro->drr_bonuslen, tx);
+ drro->drr_bonustype, drro->drr_bonuslen);
}
if (err) {
- dmu_tx_commit(tx);
return (EINVAL);
}
- dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksum, tx);
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_bonus(tx, drro->drr_object);
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err) {
+ dmu_tx_abort(tx);
+ return (err);
+ }
+
+ 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) {
ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
bcopy(data, db->db_data, drro->drr_bonuslen);
if (ra->byteswap) {
- dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
+ dmu_object_byteswap_t byteswap =
+ DMU_OT_BYTESWAP(drro->drr_bonustype);
+ dmu_ot_byteswap[byteswap].ob_func(db->db_data,
drro->drr_bonuslen);
}
dmu_buf_rele(db, FTAG);
}
/* ARGSUSED */
-static int
+noinline static int
restore_freeobjects(struct restorearg *ra, objset_t *os,
struct drr_freeobjects *drrfo)
{
return (0);
}
-static int
+noinline static int
restore_write(struct restorearg *ra, objset_t *os,
struct drr_write *drrw)
{
int err;
if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
- drrw->drr_type >= DMU_OT_NUMTYPES)
+ !DMU_OT_IS_VALID(drrw->drr_type))
return (EINVAL);
data = restore_read(ra, drrw->drr_length);
dmu_tx_abort(tx);
return (err);
}
- if (ra->byteswap)
- dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
+ if (ra->byteswap) {
+ dmu_object_byteswap_t byteswap =
+ DMU_OT_BYTESWAP(drrw->drr_type);
+ dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length);
+ }
dmu_write(os, drrw->drr_object,
drrw->drr_offset, drrw->drr_length, data, tx);
dmu_tx_commit(tx);
return (0);
}
-/* ARGSUSED */
+/*
+ * 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;
+ }
+
+ err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
+ drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH);
+ if (err)
+ 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 */
+noinline static int
restore_free(struct restorearg *ra, objset_t *os,
struct drr_free *drrf)
{
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, vnode_t *vp, offset_t *voffp)
+dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
+ int cleanup_fd, uint64_t *action_handlep)
{
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;
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);
ra.vp = vp;
ra.voff = *voffp;
ra.bufsize = 1<<20;
- ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
+ ra.buf = vmem_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));
+ 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;
+ }
+
+ drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
+ }
+
/*
* Read records and process them.
*/
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;
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;
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);
+ vmem_free(ra.buf, ra.bufsize);
*voffp = ra.voff;
return (ra.err);
}
}
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);
ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
}
-int
-dmu_recv_end(dmu_recv_cookie_t *drc)
+static int
+add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *ds)
{
- struct recvendsyncarg resa;
- dsl_dataset_t *ds = drc->drc_logical_ds;
+ dsl_pool_t *dp = ds->ds_dir->dd_pool;
+ uint64_t snapobj = ds->ds_phys->ds_prev_snap_obj;
+ dsl_dataset_t *snapds;
+ guid_map_entry_t *gmep;
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);
+ ASSERT(guid_map != NULL);
- 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);
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_dataset_hold_obj(dp, snapobj, guid_map, &snapds);
+ if (err == 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);
+ }
+
+ rw_exit(&dp->dp_config_rwlock);
+ return (err);
+}
+
+static int
+dmu_recv_existing_end(dmu_recv_cookie_t *drc)
+{
+ struct recvendsyncarg resa;
+ dsl_dataset_t *ds = drc->drc_logical_ds;
+ int err, myerr;
+
+ 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;
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);
+ if (err == 0 && drc->drc_guid_to_ds_map != NULL)
+ (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
dsl_dataset_disown(ds, dmu_recv_tag);
+ myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+ ASSERT0(myerr);
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 {
+ if (drc->drc_guid_to_ds_map != NULL)
+ (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
+ /* 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));
+}
git://git.camperquake.de / zfs.git / blobdiff