*/
/*
* 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 <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;
+/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
+int zfs_send_corrupt_data = B_FALSE;
-struct backuparg {
- dmu_replay_record_t *drr;
- vnode_t *vp;
- offset_t *off;
- objset_t *os;
- zio_cksum_t zc;
- uint64_t toguid;
- int err;
- pendop_t pending_op;
-};
+static char *dmu_recv_tag = "dmu_recv_tag";
static int
-dump_bytes(struct backuparg *ba, void *buf, int len)
+dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
{
+ 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);
- fletcher_4_incremental_native(buf, len, &ba->zc);
- ba->err = vn_rdwr(UIO_WRITE, ba->vp,
+ fletcher_4_incremental_native(buf, len, &dsp->dsa_zc);
+ dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
(caddr_t)buf, len,
0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
- *ba->off += len;
- return (ba->err);
+
+ mutex_enter(&ds->ds_sendstream_lock);
+ *dsp->dsa_off += len;
+ mutex_exit(&ds->ds_sendstream_lock);
+
+ return (dsp->dsa_err);
}
static int
-dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
+dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
uint64_t length)
{
- struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
+ 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,
* 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)
+ 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);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
- if (ba->pending_op == PENDING_FREE) {
+ 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
return (0);
} else {
/* not a continuation. Push out pending record */
- if (dump_bytes(ba, ba->drr,
+ if (dump_bytes(dsp, dsp->dsa_drr,
sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_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;
+ 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 = ba->toguid;
+ drrf->drr_toguid = dsp->dsa_toguid;
if (length == -1ULL) {
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
} else {
- ba->pending_op = PENDING_FREE;
+ dsp->dsa_pending_op = PENDING_FREE;
}
return (0);
}
static int
-dump_data(struct backuparg *ba, dmu_object_type_t type,
+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 = &(ba->drr->drr_u.drr_write);
+ struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write);
/*
* 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)
+ if (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
/* write a DATA record */
- bzero(ba->drr, sizeof (dmu_replay_record_t));
- ba->drr->drr_type = DRR_WRITE;
+ 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 = ba->toguid;
+ 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_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)
+ if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- if (dump_bytes(ba, data, blksz) != 0)
+ if (dump_bytes(dsp, data, blksz) != 0)
return (EINTR);
return (0);
}
static int
-dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data)
+dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data)
{
- struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill);
+ struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
- if (ba->pending_op != PENDING_NONE) {
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+ if (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
/* write a SPILL record */
- bzero(ba->drr, sizeof (dmu_replay_record_t));
- ba->drr->drr_type = DRR_SPILL;
+ 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 = ba->toguid;
+ drrs->drr_toguid = dsp->dsa_toguid;
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
+ if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)))
return (EINTR);
- if (dump_bytes(ba, data, blksz))
+ if (dump_bytes(dsp, data, blksz))
return (EINTR);
return (0);
}
static int
-dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
+dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
{
- struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects);
+ struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects);
/*
* If there is a pending op, but it's not PENDING_FREEOBJECTS,
* 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)
+ 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);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
- if (ba->pending_op == PENDING_FREEOBJECTS) {
+ if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) {
/*
* See whether this free object array can be aggregated
* with pending one
return (0);
} else {
/* can't be aggregated. Push out pending record */
- if (dump_bytes(ba, ba->drr,
+ if (dump_bytes(dsp, dsp->dsa_drr,
sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
}
/* write a FREEOBJECTS record */
- bzero(ba->drr, sizeof (dmu_replay_record_t));
- ba->drr->drr_type = DRR_FREEOBJECTS;
+ 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 = ba->toguid;
+ drrfo->drr_toguid = dsp->dsa_toguid;
- ba->pending_op = PENDING_FREEOBJECTS;
+ dsp->dsa_pending_op = PENDING_FREEOBJECTS;
return (0);
}
static int
-dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
+dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp)
{
- struct drr_object *drro = &(ba->drr->drr_u.drr_object);
+ 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 (ba->pending_op != PENDING_NONE) {
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+ if (dsp->dsa_pending_op != PENDING_NONE) {
+ if (dump_bytes(dsp, dsp->dsa_drr,
+ sizeof (dmu_replay_record_t)) != 0)
return (EINTR);
- ba->pending_op = PENDING_NONE;
+ dsp->dsa_pending_op = PENDING_NONE;
}
/* write an OBJECT record */
- bzero(ba->drr, sizeof (dmu_replay_record_t));
- ba->drr->drr_type = DRR_OBJECT;
+ 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_bonuslen = dnp->dn_bonuslen;
drro->drr_checksumtype = dnp->dn_checksum;
drro->drr_compress = dnp->dn_compress;
- drro->drr_toguid = ba->toguid;
+ drro->drr_toguid = dsp->dsa_toguid;
- if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+ 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)) != 0)
+ 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);
}
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_sendarg_t *dsp = arg;
dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
int err = 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) {
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;
}
ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
return (EIO);
- err = dump_spill(ba, zb->zb_object, 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;
if (dsl_read(NULL, spa, bp, pbuf,
arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
- return (EIO);
+ 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(ba, type, zb->zb_object, zb->zb_blkid * blksz,
+ 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_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;
#ifdef _KERNEL
if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
uint64_t version;
- if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0)
+ 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,
if (fromorigin)
dsl_dataset_rele(fromds, FTAG);
- ba.drr = drr;
- ba.vp = vp;
- 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)) != 0) {
- 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 (ba.pending_op != PENDING_NONE)
- if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0)
+ 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_toguid = ba.toguid;
+ 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)) != 0) {
- 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);
}
if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
return (ETXTBSY);
+ /* new snapshot 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);
+ if (err == 0)
+ return (EEXIST);
+ if (err != ENOENT)
+ return (err);
+
if (rbsa->fromguid) {
/* if incremental, most recent snapshot must match fromguid */
if (ds->ds_prev == NULL)
if (err != ENOENT)
return (err);
- /* new snapshot 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);
- if (err == 0)
- return (EEXIST);
- if (err != ENOENT)
- return (err);
return (0);
}
dp->dp_spa, tx, "dataset = %lld", dsobj);
}
-
static boolean_t
dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
{
return (err);
if (dmu_recv_verify_features(ds, drrb)) {
- dsl_dataset_rele(ds, dmu_recv_tag);
+ dsl_dataset_rele(ds, FTAG);
return (ENOTSUP);
}
uint64_t voff;
int bufsize; /* amount of memory allocated for buf */
zio_cksum_t cksum;
- avl_tree_t guid_to_ds_map;
+ avl_tree_t *guid_to_ds_map;
};
typedef struct guid_map_entry {
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)
+static void
+free_guid_map_onexit(void *arg)
{
- avl_tree_t *guid_map = arg;
- dsl_dataset_t *ds, *snapds;
+ avl_tree_t *ca = arg;
+ void *cookie = NULL;
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;
+ while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
+ dsl_dataset_rele(gmep->gme_ds, ca);
+ kmem_free(gmep, sizeof (guid_map_entry_t));
}
-
- rw_exit(&dp->dp_config_rwlock);
- dsl_dataset_rele(ds, FTAG);
-
- return (0);
+ avl_destroy(ca);
+ kmem_free(ca, sizeof (avl_tree_t));
}
static void *
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))
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;
void *data = NULL;
if (drro->drr_type == DMU_OT_NONE ||
- drro->drr_type >= DMU_OT_NUMTYPES ||
- drro->drr_bonustype >= DMU_OT_NUMTYPES ||
+ !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) ||
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);
*/
if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
gmesrch.guid = drrwbr->drr_refguid;
- if ((gmep = avl_find(&ra->guid_to_ds_map, &gmesrch,
+ if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
&where)) == NULL) {
return (EINVAL);
}
ref_os = os;
}
- if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
- drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH))
+ 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);
}
/* ARGSUSED */
-static int
+noinline static int
restore_free(struct restorearg *ra, objset_t *os,
struct drr_free *drrf)
{
* 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;
- guid_map_entry_t *gmep;
int featureflags;
if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
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(DMU_GET_STREAM_HDRTYPE(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) {
- 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);
+ 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;
}
/*
ASSERT(ra.err != 0);
out:
+ if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
+ zfs_onexit_fd_rele(cleanup_fd);
+
if (ra.err != 0) {
/*
* destroy what we created, so we don't leave it in the
}
}
- if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
- void *cookie = NULL;
-
- while (gmep = avl_destroy_nodes(&ra.guid_to_ds_map, &cookie)) {
- dsl_dataset_rele(gmep->gme_ds, &ra.guid_to_ds_map);
- kmem_free(gmep, sizeof (guid_map_entry_t));
- }
- avl_destroy(&ra.guid_to_ds_map);
- }
-
- kmem_free(ra.buf, ra.bufsize);
+ vmem_free(ra.buf, ra.bufsize);
*voffp = ra.voff;
return (ra.err);
}
}
static int
+add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *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;
+
+ ASSERT(guid_map != NULL);
+
+ 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;
-
- /*
- * 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);
+ int err, myerr;
if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
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);
- (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+ myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+ ASSERT3U(myerr, ==, 0);
return (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);
}