/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
int zfs_send_corrupt_data = B_FALSE;
-int zfs_send_queue_length = 16 * 1024 * 1024;
-int zfs_recv_queue_length = 16 * 1024 * 1024;
+int zfs_send_queue_length = SPA_MAXBLOCKSIZE;
/* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */
int zfs_send_set_freerecords_bit = B_TRUE;
-static char *dmu_recv_tag = "dmu_recv_tag";
-const char *recv_clone_name = "%recv";
+/*
+ * Use this to override the recordsize calculation for fast zfs send estimates.
+ */
+unsigned long zfs_override_estimate_recordsize = 0;
#define BP_SPAN(datablkszsec, indblkshift, level) \
(((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \
(level) * (indblkshift - SPA_BLKPTRSHIFT)))
-static void byteswap_record(dmu_replay_record_t *drr);
-
struct send_thread_arg {
bqueue_t q;
dsl_dataset_t *ds; /* Dataset to traverse */
(object == dsp->dsa_last_data_object &&
offset > dsp->dsa_last_data_offset));
- 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
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).
+ * There should never be a PENDING_FREE if length is
+ * DMU_OBJECT_END (because dump_dnode is the only place where
+ * this function is called with a DMU_OBJECT_END, and only after
+ * flushing any pending record).
*/
- ASSERT(length != -1ULL);
+ ASSERT(length != DMU_OBJECT_END);
/*
* 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;
+ if (offset + length < offset)
+ drrf->drr_length = DMU_OBJECT_END;
+ else
+ drrf->drr_length += length;
return (0);
} else {
/* not a continuation. Push out pending record */
dsp->dsa_drr->drr_type = DRR_FREE;
drrf->drr_object = object;
drrf->drr_offset = offset;
- drrf->drr_length = length;
+ if (offset + length < offset)
+ drrf->drr_length = DMU_OBJECT_END;
+ else
+ drrf->drr_length = length;
drrf->drr_toguid = dsp->dsa_toguid;
- if (length == -1ULL) {
+ if (length == DMU_OBJECT_END) {
if (dump_record(dsp, NULL, 0) != 0)
return (SET_ERROR(EINTR));
} else {
{
struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
uint64_t blksz = BP_GET_LSIZE(bp);
+ uint64_t payload_size = blksz;
if (dsp->dsa_pending_op != PENDING_NONE) {
if (dump_record(dsp, NULL, 0) != 0)
drrs->drr_compressed_size = BP_GET_PSIZE(bp);
zio_crypt_decode_params_bp(bp, drrs->drr_salt, drrs->drr_iv);
zio_crypt_decode_mac_bp(bp, drrs->drr_mac);
+ payload_size = drrs->drr_compressed_size;
}
- if (dump_record(dsp, data, blksz) != 0)
+ if (dump_record(dsp, data, payload_size) != 0)
return (SET_ERROR(EINTR));
return (0);
}
dnode_phys_t *dnp)
{
struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
- int bonuslen = P2ROUNDUP(dnp->dn_bonuslen, 8);
+ int bonuslen;
if (object < dsp->dsa_resume_object) {
/*
drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE)
drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE;
+ bonuslen = P2ROUNDUP(dnp->dn_bonuslen, 8);
+
if ((dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW)) {
ASSERT(BP_IS_ENCRYPTED(bp));
drro->drr_flags |= DRR_RAW_BYTESWAP;
/* needed for reconstructing dnp on recv side */
+ drro->drr_maxblkid = dnp->dn_maxblkid;
drro->drr_indblkshift = dnp->dn_indblkshift;
drro->drr_nlevels = dnp->dn_nlevels;
drro->drr_nblkptr = dnp->dn_nblkptr;
/*
* Since we encrypt the entire bonus area, the (raw) part
- * beyond the the bonuslen is actually nonzero, so we need
+ * beyond the bonuslen is actually nonzero, so we need
* to send it.
*/
if (bonuslen != 0) {
/* Free anything past the end of the file. */
if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
- (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0)
+ (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), DMU_OBJECT_END) != 0)
return (SET_ERROR(EINTR));
if (dsp->dsa_err != 0)
return (SET_ERROR(EINTR));
spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
int err = 0;
- uint64_t dnobj;
ASSERT3U(zb->zb_level, >=, 0);
} else if (BP_IS_HOLE(bp)) {
uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level);
uint64_t offset = zb->zb_blkid * span;
- err = dump_free(dsa, zb->zb_object, offset, span);
+ /* Don't dump free records for offsets > DMU_OBJECT_END */
+ if (zb->zb_blkid == 0 || span <= DMU_OBJECT_END / zb->zb_blkid)
+ err = dump_free(dsa, zb->zb_object, offset, span);
} else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
return (0);
} else if (type == DMU_OT_DNODE) {
- dnode_phys_t *blk;
int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
arc_flags_t aflags = ARC_FLAG_WAIT;
arc_buf_t *abuf;
enum zio_flag zioflags = ZIO_FLAG_CANFAIL;
- int i;
if (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
ASSERT(BP_IS_ENCRYPTED(bp));
ZIO_PRIORITY_ASYNC_READ, zioflags, &aflags, zb) != 0)
return (SET_ERROR(EIO));
- blk = abuf->b_data;
- dnobj = zb->zb_blkid * epb;
+ dnode_phys_t *blk = abuf->b_data;
+ uint64_t dnobj = zb->zb_blkid * epb;
/*
* Raw sends require sending encryption parameters for the
}
if (err == 0) {
- for (i = 0; i < epb; i += blk[i].dn_extra_slots + 1) {
+ for (int i = 0; i < epb;
+ i += blk[i].dn_extra_slots + 1) {
err = dump_dnode(dsa, bp, dnobj + i, blk + i);
if (err != 0)
break;
*/
if (!rawok && os->os_encrypted &&
arc_is_unauthenticated(os->os_phys_buf)) {
+ zbookmark_phys_t zb;
+
+ SET_BOOKMARK(&zb, to_ds->ds_object, ZB_ROOT_OBJECT,
+ ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
err = arc_untransform(os->os_phys_buf, os->os_spa,
- to_ds->ds_object, B_FALSE);
+ &zb, B_FALSE);
if (err != 0) {
dsl_pool_rele(dp, tag);
return (err);
/* raw sends imply large_block_ok */
if ((large_block_ok || rawok) &&
- to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS])
+ dsl_dataset_feature_is_active(to_ds, SPA_FEATURE_LARGE_BLOCKS))
featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS;
- if (to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_DNODE])
+ if (dsl_dataset_feature_is_active(to_ds, SPA_FEATURE_LARGE_DNODE))
featureflags |= DMU_BACKUP_FEATURE_LARGE_DNODE;
/* encrypted datasets will not have embedded blocks */
}
if (featureflags & DMU_BACKUP_FEATURE_RAW) {
+ uint64_t ivset_guid = (ancestor_zb != NULL) ?
+ ancestor_zb->zbm_ivset_guid : 0;
+
ASSERT(os->os_encrypted);
- err = dsl_crypto_populate_key_nvlist(to_ds, &keynvl);
+ err = dsl_crypto_populate_key_nvlist(to_ds,
+ ivset_guid, &keynvl);
if (err != 0) {
fnvlist_free(nvl);
goto out;
goto out;
}
- err = bqueue_init(&to_arg.q, zfs_send_queue_length,
+ err = bqueue_init(&to_arg.q,
+ MAX(zfs_send_queue_length, 2 * zfs_max_recordsize),
offsetof(struct send_block_record, ln));
to_arg.error_code = 0;
to_arg.cancel = B_FALSE;
}
if (fromsnap != 0) {
- zfs_bookmark_phys_t zb;
+ zfs_bookmark_phys_t zb = { 0 };
boolean_t is_clone;
err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds);
dsl_pool_rele(dp, FTAG);
return (err);
}
- if (!dsl_dataset_is_before(ds, fromds, 0))
+ if (!dsl_dataset_is_before(ds, fromds, 0)) {
err = SET_ERROR(EXDEV);
+ dsl_dataset_rele(fromds, FTAG);
+ dsl_dataset_rele_flags(ds, dsflags, FTAG);
+ dsl_pool_rele(dp, FTAG);
+ return (err);
+ }
+
zb.zbm_creation_time =
dsl_dataset_phys(fromds)->ds_creation_time;
zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg;
zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
+
+ if (dsl_dataset_is_zapified(fromds)) {
+ (void) zap_lookup(dp->dp_meta_objset,
+ fromds->ds_object, DS_FIELD_IVSET_GUID, 8, 1,
+ &zb.zbm_ivset_guid);
+ }
+
is_clone = (fromds->ds_dir != ds->ds_dir);
dsl_dataset_rele(fromds, FTAG);
err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone,
err = dsl_pool_hold(tosnap, FTAG, &dp);
if (err != 0)
return (err);
-
if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) {
/*
* We are sending a filesystem or volume. Ensure
}
if (fromsnap != NULL) {
- zfs_bookmark_phys_t zb;
+ zfs_bookmark_phys_t zb = { 0 };
boolean_t is_clone = B_FALSE;
int fsnamelen = strchr(tosnap, '@') - tosnap;
dsl_dataset_phys(fromds)->ds_creation_txg;
zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
is_clone = (ds->ds_dir != fromds->ds_dir);
+
+ if (dsl_dataset_is_zapified(fromds)) {
+ (void) zap_lookup(dp->dp_meta_objset,
+ fromds->ds_object,
+ DS_FIELD_IVSET_GUID, 8, 1,
+ &zb.zbm_ivset_guid);
+ }
dsl_dataset_rele(fromds, FTAG);
}
} else {
dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t uncompressed,
uint64_t compressed, boolean_t stream_compressed, uint64_t *sizep)
{
- int err;
+ int err = 0;
uint64_t size;
/*
* Assume that space (both on-disk and in-stream) is dominated by
VERIFY0(dmu_objset_from_ds(ds, &os));
/* Assume all (uncompressed) blocks are recordsize. */
- if (os->os_phys->os_type == DMU_OST_ZVOL) {
+ if (zfs_override_estimate_recordsize != 0) {
+ recordsize = zfs_override_estimate_recordsize;
+ } else if (os->os_phys->os_type == DMU_OST_ZVOL) {
err = dsl_prop_get_int_ds(ds,
zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &recordsize);
} else {
return (err);
}
-typedef struct dmu_recv_begin_arg {
- const char *drba_origin;
- dmu_recv_cookie_t *drba_cookie;
- cred_t *drba_cred;
- uint64_t drba_snapobj;
-} dmu_recv_begin_arg_t;
-
-static int
-recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds,
- uint64_t fromguid)
-{
- uint64_t val;
- int error;
- dsl_pool_t *dp = ds->ds_dir->dd_pool;
-
- /* temporary clone name must not exist */
- error = zap_lookup(dp->dp_meta_objset,
- dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name,
- 8, 1, &val);
- if (error != ENOENT)
- return (error == 0 ? EBUSY : error);
-
- /* new snapshot name must not exist */
- error = zap_lookup(dp->dp_meta_objset,
- dsl_dataset_phys(ds)->ds_snapnames_zapobj,
- drba->drba_cookie->drc_tosnap, 8, 1, &val);
- if (error != ENOENT)
- return (error == 0 ? EEXIST : error);
-
- /*
- * Check snapshot limit before receiving. We'll recheck again at the
- * end, but might as well abort before receiving if we're already over
- * the limit.
- *
- * Note that we do not check the file system limit with
- * dsl_dir_fscount_check because the temporary %clones don't count
- * against that limit.
- */
- error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT,
- NULL, drba->drba_cred);
- if (error != 0)
- return (error);
-
- if (fromguid != 0) {
- dsl_dataset_t *snap;
- uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
-
- /* Find snapshot in this dir that matches fromguid. */
- while (obj != 0) {
- error = dsl_dataset_hold_obj(dp, obj, FTAG,
- &snap);
- if (error != 0)
- return (SET_ERROR(ENODEV));
- if (snap->ds_dir != ds->ds_dir) {
- dsl_dataset_rele(snap, FTAG);
- return (SET_ERROR(ENODEV));
- }
- if (dsl_dataset_phys(snap)->ds_guid == fromguid)
- break;
- obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
- dsl_dataset_rele(snap, FTAG);
- }
- if (obj == 0)
- return (SET_ERROR(ENODEV));
-
- if (drba->drba_cookie->drc_force) {
- drba->drba_snapobj = obj;
- } else {
- /*
- * If we are not forcing, there must be no
- * changes since fromsnap.
- */
- if (dsl_dataset_modified_since_snap(ds, snap)) {
- dsl_dataset_rele(snap, FTAG);
- return (SET_ERROR(ETXTBSY));
- }
- drba->drba_snapobj = ds->ds_prev->ds_object;
- }
-
- dsl_dataset_rele(snap, FTAG);
- } else {
- /* if full, then must be forced */
- if (!drba->drba_cookie->drc_force)
- return (SET_ERROR(EEXIST));
-
- /*
- * We don't support using zfs recv -F to blow away
- * encrypted filesystems. This would require the
- * dsl dir to point to the old encryption key and
- * the new one at the same time during the receive.
- */
- if (ds->ds_dir->dd_crypto_obj != 0)
- return (SET_ERROR(EINVAL));
-
- drba->drba_snapobj = 0;
- }
-
- return (0);
-
-}
-
-static int
-dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_begin_arg_t *drba = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
- uint64_t fromguid = drrb->drr_fromguid;
- int flags = drrb->drr_flags;
- ds_hold_flags_t dsflags = 0;
- int error;
- uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- dsl_dataset_t *ds;
- const char *tofs = drba->drba_cookie->drc_tofs;
-
- /* already checked */
- ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
- ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING));
-
- if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
- DMU_COMPOUNDSTREAM ||
- drrb->drr_type >= DMU_OST_NUMTYPES ||
- ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL))
- return (SET_ERROR(EINVAL));
-
- /* Verify pool version supports SA if SA_SPILL feature set */
- if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
- spa_version(dp->dp_spa) < SPA_VERSION_SA)
- return (SET_ERROR(ENOTSUP));
-
- if (drba->drba_cookie->drc_resumable &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET))
- return (SET_ERROR(ENOTSUP));
-
- /*
- * The receiving code doesn't know how to translate a WRITE_EMBEDDED
- * record to a plain WRITE record, so the pool must have the
- * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED
- * records. Same with WRITE_EMBEDDED records that use LZ4 compression.
- */
- if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA))
- return (SET_ERROR(ENOTSUP));
- if ((featureflags & DMU_BACKUP_FEATURE_LZ4) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS))
- return (SET_ERROR(ENOTSUP));
-
- /*
- * The receiving code doesn't know how to translate large blocks
- * to smaller ones, so the pool must have the LARGE_BLOCKS
- * feature enabled if the stream has LARGE_BLOCKS. Same with
- * large dnodes.
- */
- if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS))
- return (SET_ERROR(ENOTSUP));
- if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE))
- return (SET_ERROR(ENOTSUP));
-
- if ((featureflags & DMU_BACKUP_FEATURE_RAW)) {
- /* raw receives require the encryption feature */
- if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_ENCRYPTION))
- return (SET_ERROR(ENOTSUP));
- } else {
- dsflags |= DS_HOLD_FLAG_DECRYPT;
- }
-
- error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds);
- if (error == 0) {
- /* target fs already exists; recv into temp clone */
-
- /* Can't recv a clone into an existing fs */
- if (flags & DRR_FLAG_CLONE || drba->drba_origin) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
-
- error = recv_begin_check_existing_impl(drba, ds, fromguid);
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- } else if (error == ENOENT) {
- /* target fs does not exist; must be a full backup or clone */
- char buf[ZFS_MAX_DATASET_NAME_LEN];
-
- /*
- * If it's a non-clone incremental, we are missing the
- * target fs, so fail the recv.
- */
- if (fromguid != 0 && !(flags & DRR_FLAG_CLONE ||
- drba->drba_origin))
- return (SET_ERROR(ENOENT));
-
- /*
- * If we're receiving a full send as a clone, and it doesn't
- * contain all the necessary free records and freeobject
- * records, reject it.
- */
- if (fromguid == 0 && drba->drba_origin &&
- !(flags & DRR_FLAG_FREERECORDS))
- return (SET_ERROR(EINVAL));
-
- /* Open the parent of tofs */
- ASSERT3U(strlen(tofs), <, sizeof (buf));
- (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1);
- error = dsl_dataset_hold_flags(dp, buf, dsflags, FTAG, &ds);
- if (error != 0)
- return (error);
-
- /*
- * Check filesystem and snapshot limits before receiving. We'll
- * recheck snapshot limits again at the end (we create the
- * filesystems and increment those counts during begin_sync).
- */
- error = dsl_fs_ss_limit_check(ds->ds_dir, 1,
- ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred);
- if (error != 0) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (error);
- }
-
- error = dsl_fs_ss_limit_check(ds->ds_dir, 1,
- ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred);
- if (error != 0) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (error);
- }
-
- if (drba->drba_origin != NULL) {
- dsl_dataset_t *origin;
-
- error = dsl_dataset_hold_flags(dp, drba->drba_origin,
- dsflags, FTAG, &origin);
- if (error != 0) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (error);
- }
- if (!origin->ds_is_snapshot) {
- dsl_dataset_rele_flags(origin, dsflags, FTAG);
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
- if (dsl_dataset_phys(origin)->ds_guid != fromguid &&
- fromguid != 0) {
- dsl_dataset_rele_flags(origin, dsflags, FTAG);
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(ENODEV));
- }
- dsl_dataset_rele_flags(origin,
- dsflags, FTAG);
- }
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- error = 0;
- }
- return (error);
-}
-
-static void
-dmu_recv_begin_sync(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_begin_arg_t *drba = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- objset_t *mos = dp->dp_meta_objset;
- struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
- const char *tofs = drba->drba_cookie->drc_tofs;
- uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- dsl_dataset_t *ds, *newds;
- objset_t *os;
- uint64_t dsobj;
- ds_hold_flags_t dsflags = 0;
- int error;
- uint64_t crflags = 0;
- dsl_crypto_params_t *dcpp = NULL;
- dsl_crypto_params_t dcp = { 0 };
-
- if (drrb->drr_flags & DRR_FLAG_CI_DATA)
- crflags |= DS_FLAG_CI_DATASET;
- if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0) {
- dsflags |= DS_HOLD_FLAG_DECRYPT;
- } else {
- dcp.cp_cmd = DCP_CMD_RAW_RECV;
- }
-
- error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds);
- if (error == 0) {
- /* create temporary clone */
- dsl_dataset_t *snap = NULL;
-
- if (drba->drba_snapobj != 0) {
- VERIFY0(dsl_dataset_hold_obj(dp,
- drba->drba_snapobj, FTAG, &snap));
- } else {
- /* we use the dcp whenever we are not making a clone */
- dcpp = &dcp;
- }
-
- dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name,
- snap, crflags, drba->drba_cred, dcpp, tx);
- if (drba->drba_snapobj != 0)
- dsl_dataset_rele(snap, FTAG);
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- } else {
- dsl_dir_t *dd;
- const char *tail;
- dsl_dataset_t *origin = NULL;
-
- VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail));
-
- if (drba->drba_origin != NULL) {
- VERIFY0(dsl_dataset_hold(dp, drba->drba_origin,
- FTAG, &origin));
- } else {
- /* we use the dcp whenever we are not making a clone */
- dcpp = &dcp;
- }
-
- /* Create new dataset. */
- dsobj = dsl_dataset_create_sync(dd, strrchr(tofs, '/') + 1,
- origin, crflags, drba->drba_cred, dcpp, tx);
- if (origin != NULL)
- dsl_dataset_rele(origin, FTAG);
- dsl_dir_rele(dd, FTAG);
- drba->drba_cookie->drc_newfs = B_TRUE;
- }
- VERIFY0(dsl_dataset_own_obj(dp, dsobj, dsflags, dmu_recv_tag, &newds));
- VERIFY0(dmu_objset_from_ds(newds, &os));
-
- if (drba->drba_cookie->drc_resumable) {
- uint64_t one = 1;
- uint64_t zero = 0;
-
- dsl_dataset_zapify(newds, tx);
- if (drrb->drr_fromguid != 0) {
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID,
- 8, 1, &drrb->drr_fromguid, tx));
- }
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID,
- 8, 1, &drrb->drr_toguid, tx));
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME,
- 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx));
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT,
- 8, 1, &one, tx));
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET,
- 8, 1, &zero, tx));
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES,
- 8, 1, &zero, tx));
- if (featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) {
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_LARGEBLOCK,
- 8, 1, &one, tx));
- }
- if (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) {
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK,
- 8, 1, &one, tx));
- }
- if (featureflags & DMU_BACKUP_FEATURE_COMPRESSED) {
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_COMPRESSOK,
- 8, 1, &one, tx));
- }
- if (featureflags & DMU_BACKUP_FEATURE_RAW) {
- VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_RAWOK,
- 8, 1, &one, tx));
- }
- }
-
- /*
- * Usually the os->os_encrypted value is tied to the presence of a
- * DSL Crypto Key object in the dd. However, that will not be received
- * until dmu_recv_stream(), so we set the value manually for now.
- */
- if (featureflags & DMU_BACKUP_FEATURE_RAW) {
- os->os_encrypted = B_TRUE;
- drba->drba_cookie->drc_raw = B_TRUE;
- }
-
- dmu_buf_will_dirty(newds->ds_dbuf, tx);
- dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT;
-
- /*
- * If we actually created a non-clone, we need to create the objset
- * in our new dataset. If this is a raw send we postpone this until
- * dmu_recv_stream() so that we can allocate the metadnode with the
- * properties from the DRR_BEGIN payload.
- */
- rrw_enter(&newds->ds_bp_rwlock, RW_READER, FTAG);
- if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds)) &&
- (featureflags & DMU_BACKUP_FEATURE_RAW) == 0) {
- (void) dmu_objset_create_impl(dp->dp_spa,
- newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx);
- }
- rrw_exit(&newds->ds_bp_rwlock, FTAG);
-
- drba->drba_cookie->drc_ds = newds;
-
- spa_history_log_internal_ds(newds, "receive", tx, "");
-}
-
-static int
-dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_begin_arg_t *drba = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
- int error;
- ds_hold_flags_t dsflags = 0;
- uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- dsl_dataset_t *ds;
- const char *tofs = drba->drba_cookie->drc_tofs;
- uint64_t val;
-
- /* 6 extra bytes for /%recv */
- char recvname[ZFS_MAX_DATASET_NAME_LEN + 6];
-
- /* already checked */
- ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
- ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING);
-
- if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
- DMU_COMPOUNDSTREAM ||
- drrb->drr_type >= DMU_OST_NUMTYPES)
- return (SET_ERROR(EINVAL));
-
- /* Verify pool version supports SA if SA_SPILL feature set */
- if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
- spa_version(dp->dp_spa) < SPA_VERSION_SA)
- return (SET_ERROR(ENOTSUP));
-
- /*
- * The receiving code doesn't know how to translate a WRITE_EMBEDDED
- * record to a plain WRITE record, so the pool must have the
- * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED
- * records. Same with WRITE_EMBEDDED records that use LZ4 compression.
- */
- if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA))
- return (SET_ERROR(ENOTSUP));
- if ((featureflags & DMU_BACKUP_FEATURE_LZ4) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS))
- return (SET_ERROR(ENOTSUP));
-
- /*
- * The receiving code doesn't know how to translate large blocks
- * to smaller ones, so the pool must have the LARGE_BLOCKS
- * feature enabled if the stream has LARGE_BLOCKS. Same with
- * large dnodes.
- */
- if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS))
- return (SET_ERROR(ENOTSUP));
- if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) &&
- !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE))
- return (SET_ERROR(ENOTSUP));
-
- (void) snprintf(recvname, sizeof (recvname), "%s/%s",
- tofs, recv_clone_name);
-
- if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0)
- dsflags |= DS_HOLD_FLAG_DECRYPT;
-
- if (dsl_dataset_hold_flags(dp, recvname, dsflags, FTAG, &ds) != 0) {
- /* %recv does not exist; continue in tofs */
- error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds);
- if (error != 0)
- return (error);
- }
-
- /* check that ds is marked inconsistent */
- if (!DS_IS_INCONSISTENT(ds)) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
-
- /* check that there is resuming data, and that the toguid matches */
- if (!dsl_dataset_is_zapified(ds)) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
- error = zap_lookup(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val);
- if (error != 0 || drrb->drr_toguid != val) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Check if the receive is still running. If so, it will be owned.
- * Note that nothing else can own the dataset (e.g. after the receive
- * fails) because it will be marked inconsistent.
- */
- if (dsl_dataset_has_owner(ds)) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EBUSY));
- }
-
- /* There should not be any snapshots of this fs yet. */
- if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Note: resume point will be checked when we process the first WRITE
- * record.
- */
-
- /* check that the origin matches */
- val = 0;
- (void) zap_lookup(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val);
- if (drrb->drr_fromguid != val) {
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (SET_ERROR(EINVAL));
- }
-
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
- return (0);
-}
-
-static void
-dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_begin_arg_t *drba = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- const char *tofs = drba->drba_cookie->drc_tofs;
- struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
- uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- dsl_dataset_t *ds;
- objset_t *os;
- ds_hold_flags_t dsflags = 0;
- uint64_t dsobj;
- /* 6 extra bytes for /%recv */
- char recvname[ZFS_MAX_DATASET_NAME_LEN + 6];
-
- (void) snprintf(recvname, sizeof (recvname), "%s/%s",
- tofs, recv_clone_name);
-
- if (featureflags & DMU_BACKUP_FEATURE_RAW) {
- drba->drba_cookie->drc_raw = B_TRUE;
- } else {
- dsflags |= DS_HOLD_FLAG_DECRYPT;
- }
-
- if (dsl_dataset_hold_flags(dp, recvname, dsflags, FTAG, &ds) != 0) {
- /* %recv does not exist; continue in tofs */
- VERIFY0(dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds));
- drba->drba_cookie->drc_newfs = B_TRUE;
- }
-
- /* clear the inconsistent flag so that we can own it */
- ASSERT(DS_IS_INCONSISTENT(ds));
- dmu_buf_will_dirty(ds->ds_dbuf, tx);
- dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT;
- dsobj = ds->ds_object;
- dsl_dataset_rele_flags(ds, dsflags, FTAG);
-
- VERIFY0(dsl_dataset_own_obj(dp, dsobj, dsflags, dmu_recv_tag, &ds));
- VERIFY0(dmu_objset_from_ds(ds, &os));
-
- dmu_buf_will_dirty(ds->ds_dbuf, tx);
- dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT;
-
- rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
- ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds)));
- rrw_exit(&ds->ds_bp_rwlock, FTAG);
-
- drba->drba_cookie->drc_ds = ds;
-
- spa_history_log_internal_ds(ds, "resume receive", tx, "");
-}
-
-/*
- * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
- * succeeds; otherwise we will leak the holds on the datasets.
- */
-int
-dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin,
- boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc)
-{
- dmu_recv_begin_arg_t drba = { 0 };
-
- bzero(drc, sizeof (dmu_recv_cookie_t));
- drc->drc_drr_begin = drr_begin;
- drc->drc_drrb = &drr_begin->drr_u.drr_begin;
- drc->drc_tosnap = tosnap;
- drc->drc_tofs = tofs;
- drc->drc_force = force;
- drc->drc_resumable = resumable;
- drc->drc_cred = CRED();
- drc->drc_clone = (origin != NULL);
-
- if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
- drc->drc_byteswap = B_TRUE;
- (void) fletcher_4_incremental_byteswap(drr_begin,
- sizeof (dmu_replay_record_t), &drc->drc_cksum);
- byteswap_record(drr_begin);
- } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) {
- (void) fletcher_4_incremental_native(drr_begin,
- sizeof (dmu_replay_record_t), &drc->drc_cksum);
- } else {
- return (SET_ERROR(EINVAL));
- }
-
- drba.drba_origin = origin;
- drba.drba_cookie = drc;
- drba.drba_cred = CRED();
-
- if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) &
- DMU_BACKUP_FEATURE_RESUMING) {
- return (dsl_sync_task(tofs,
- dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync,
- &drba, 5, ZFS_SPACE_CHECK_NORMAL));
- } else {
- return (dsl_sync_task(tofs,
- dmu_recv_begin_check, dmu_recv_begin_sync,
- &drba, 5, ZFS_SPACE_CHECK_NORMAL));
- }
-}
-
-struct receive_record_arg {
- dmu_replay_record_t header;
- void *payload; /* Pointer to a buffer containing the payload */
- /*
- * If the record is a write, pointer to the arc_buf_t containing the
- * payload.
- */
- arc_buf_t *arc_buf;
- int payload_size;
- uint64_t bytes_read; /* bytes read from stream when record created */
- boolean_t eos_marker; /* Marks the end of the stream */
- bqueue_node_t node;
-};
-
-struct receive_writer_arg {
- objset_t *os;
- boolean_t byteswap;
- bqueue_t q;
-
- /*
- * These three args are used to signal to the main thread that we're
- * done.
- */
- kmutex_t mutex;
- kcondvar_t cv;
- boolean_t done;
-
- int err;
- /* A map from guid to dataset to help handle dedup'd streams. */
- avl_tree_t *guid_to_ds_map;
- boolean_t resumable;
- boolean_t raw;
- uint64_t last_object;
- uint64_t last_offset;
- uint64_t max_object; /* highest object ID referenced in stream */
- uint64_t bytes_read; /* bytes read when current record created */
-};
-
-struct objlist {
- list_t list; /* List of struct receive_objnode. */
- /*
- * Last object looked up. Used to assert that objects are being looked
- * up in ascending order.
- */
- uint64_t last_lookup;
-};
-
-struct receive_objnode {
- list_node_t node;
- uint64_t object;
-};
-
-struct receive_arg {
- objset_t *os;
- vnode_t *vp; /* The vnode to read the stream from */
- uint64_t voff; /* The current offset in the stream */
- uint64_t bytes_read;
- /*
- * A record that has had its payload read in, but hasn't yet been handed
- * off to the worker thread.
- */
- struct receive_record_arg *rrd;
- /* A record that has had its header read in, but not its payload. */
- struct receive_record_arg *next_rrd;
- zio_cksum_t cksum;
- zio_cksum_t prev_cksum;
- int err;
- boolean_t byteswap;
- boolean_t raw;
- uint64_t featureflags;
- /* Sorted list of objects not to issue prefetches for. */
- struct objlist ignore_objlist;
-};
-
-typedef struct guid_map_entry {
- uint64_t guid;
- boolean_t raw;
- dsl_dataset_t *gme_ds;
- avl_node_t avlnode;
-} guid_map_entry_t;
-
-static int
-guid_compare(const void *arg1, const void *arg2)
-{
- const guid_map_entry_t *gmep1 = (const guid_map_entry_t *)arg1;
- const guid_map_entry_t *gmep2 = (const guid_map_entry_t *)arg2;
- return (AVL_CMP(gmep1->guid, gmep2->guid));
-}
+#if defined(_KERNEL)
+/* BEGIN CSTYLED */
+module_param(zfs_override_estimate_recordsize, ulong, 0644);
+MODULE_PARM_DESC(zfs_override_estimate_recordsize,
+ "Record size calculation override for zfs send estimates");
+/* END CSTYLED */
-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_long_rele(gmep->gme_ds, gmep);
- dsl_dataset_rele_flags(gmep->gme_ds,
- (gmep->raw) ? 0 : DS_HOLD_FLAG_DECRYPT, gmep);
- kmem_free(gmep, sizeof (guid_map_entry_t));
- }
- avl_destroy(ca);
- kmem_free(ca, sizeof (avl_tree_t));
-}
+module_param(zfs_send_corrupt_data, int, 0644);
+MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data");
-static int
-receive_read(struct receive_arg *ra, int len, void *buf)
-{
- int done = 0;
-
- /*
- * The code doesn't rely on this (lengths being multiples of 8). See
- * comment in dump_bytes.
- */
- ASSERT(len % 8 == 0 ||
- (ra->featureflags & DMU_BACKUP_FEATURE_RAW) != 0);
-
- while (done < len) {
- ssize_t resid;
-
- ra->err = vn_rdwr(UIO_READ, ra->vp,
- (char *)buf + done, len - done,
- ra->voff, UIO_SYSSPACE, FAPPEND,
- RLIM64_INFINITY, CRED(), &resid);
-
- if (resid == len - done) {
- /*
- * Note: ECKSUM indicates that the receive
- * was interrupted and can potentially be resumed.
- */
- ra->err = SET_ERROR(ECKSUM);
- }
- ra->voff += len - done - resid;
- done = len - resid;
- if (ra->err != 0)
- return (ra->err);
- }
-
- ra->bytes_read += len;
-
- ASSERT3U(done, ==, len);
- return (0);
-}
-
-noinline static void
-byteswap_record(dmu_replay_record_t *drr)
-{
-#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
-#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
- drr->drr_type = BSWAP_32(drr->drr_type);
- drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
-
- switch (drr->drr_type) {
- case DRR_BEGIN:
- DO64(drr_begin.drr_magic);
- DO64(drr_begin.drr_versioninfo);
- DO64(drr_begin.drr_creation_time);
- DO32(drr_begin.drr_type);
- DO32(drr_begin.drr_flags);
- DO64(drr_begin.drr_toguid);
- DO64(drr_begin.drr_fromguid);
- break;
- case DRR_OBJECT:
- DO64(drr_object.drr_object);
- DO32(drr_object.drr_type);
- DO32(drr_object.drr_bonustype);
- DO32(drr_object.drr_blksz);
- DO32(drr_object.drr_bonuslen);
- DO32(drr_object.drr_raw_bonuslen);
- DO64(drr_object.drr_toguid);
- break;
- case DRR_FREEOBJECTS:
- DO64(drr_freeobjects.drr_firstobj);
- DO64(drr_freeobjects.drr_numobjs);
- DO64(drr_freeobjects.drr_toguid);
- break;
- case DRR_WRITE:
- DO64(drr_write.drr_object);
- DO32(drr_write.drr_type);
- DO64(drr_write.drr_offset);
- DO64(drr_write.drr_logical_size);
- DO64(drr_write.drr_toguid);
- ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum);
- DO64(drr_write.drr_key.ddk_prop);
- DO64(drr_write.drr_compressed_size);
- break;
- case DRR_WRITE_BYREF:
- DO64(drr_write_byref.drr_object);
- DO64(drr_write_byref.drr_offset);
- DO64(drr_write_byref.drr_length);
- DO64(drr_write_byref.drr_toguid);
- DO64(drr_write_byref.drr_refguid);
- DO64(drr_write_byref.drr_refobject);
- DO64(drr_write_byref.drr_refoffset);
- ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref.
- drr_key.ddk_cksum);
- DO64(drr_write_byref.drr_key.ddk_prop);
- break;
- case DRR_WRITE_EMBEDDED:
- DO64(drr_write_embedded.drr_object);
- DO64(drr_write_embedded.drr_offset);
- DO64(drr_write_embedded.drr_length);
- DO64(drr_write_embedded.drr_toguid);
- DO32(drr_write_embedded.drr_lsize);
- DO32(drr_write_embedded.drr_psize);
- break;
- case DRR_FREE:
- DO64(drr_free.drr_object);
- DO64(drr_free.drr_offset);
- DO64(drr_free.drr_length);
- DO64(drr_free.drr_toguid);
- break;
- case DRR_SPILL:
- DO64(drr_spill.drr_object);
- DO64(drr_spill.drr_length);
- DO64(drr_spill.drr_toguid);
- DO64(drr_spill.drr_compressed_size);
- DO32(drr_spill.drr_type);
- break;
- case DRR_OBJECT_RANGE:
- DO64(drr_object_range.drr_firstobj);
- DO64(drr_object_range.drr_numslots);
- DO64(drr_object_range.drr_toguid);
- break;
- case DRR_END:
- DO64(drr_end.drr_toguid);
- ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum);
- break;
- default:
- break;
- }
-
- if (drr->drr_type != DRR_BEGIN) {
- ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum);
- }
-
-#undef DO64
-#undef DO32
-}
-
-static inline uint8_t
-deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size)
-{
- if (bonus_type == DMU_OT_SA) {
- return (1);
- } else {
- return (1 +
- ((DN_OLD_MAX_BONUSLEN -
- MIN(DN_OLD_MAX_BONUSLEN, bonus_size)) >> SPA_BLKPTRSHIFT));
- }
-}
-
-static void
-save_resume_state(struct receive_writer_arg *rwa,
- uint64_t object, uint64_t offset, dmu_tx_t *tx)
-{
- int txgoff = dmu_tx_get_txg(tx) & TXG_MASK;
-
- if (!rwa->resumable)
- return;
-
- /*
- * We use ds_resume_bytes[] != 0 to indicate that we need to
- * update this on disk, so it must not be 0.
- */
- ASSERT(rwa->bytes_read != 0);
-
- /*
- * We only resume from write records, which have a valid
- * (non-meta-dnode) object number.
- */
- ASSERT(object != 0);
-
- /*
- * For resuming to work correctly, we must receive records in order,
- * sorted by object,offset. This is checked by the callers, but
- * assert it here for good measure.
- */
- ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]);
- ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] ||
- offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]);
- ASSERT3U(rwa->bytes_read, >=,
- rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]);
-
- rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object;
- rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset;
- rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read;
-}
-
-noinline static int
-receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
- void *data)
-{
- dmu_object_info_t doi;
- dmu_tx_t *tx;
- uint64_t object;
- int err;
-
- if (drro->drr_type == DMU_OT_NONE ||
- !DMU_OT_IS_VALID(drro->drr_type) ||
- !DMU_OT_IS_VALID(drro->drr_bonustype) ||
- drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
- drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
- P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
- drro->drr_blksz < SPA_MINBLOCKSIZE ||
- drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) ||
- drro->drr_bonuslen >
- DN_BONUS_SIZE(spa_maxdnodesize(dmu_objset_spa(rwa->os))) ||
- drro->drr_dn_slots >
- (spa_maxdnodesize(dmu_objset_spa(rwa->os)) >> DNODE_SHIFT)) {
- return (SET_ERROR(EINVAL));
- }
-
- if (rwa->raw) {
- if (drro->drr_raw_bonuslen < drro->drr_bonuslen ||
- drro->drr_indblkshift > SPA_MAXBLOCKSHIFT ||
- drro->drr_nlevels > DN_MAX_LEVELS ||
- drro->drr_nblkptr > DN_MAX_NBLKPTR ||
- DN_SLOTS_TO_BONUSLEN(drro->drr_dn_slots) <
- drro->drr_raw_bonuslen)
- return (SET_ERROR(EINVAL));
- } else {
- if (drro->drr_flags != 0 || drro->drr_raw_bonuslen != 0 ||
- drro->drr_indblkshift != 0 || drro->drr_nlevels != 0 ||
- drro->drr_nblkptr != 0)
- return (SET_ERROR(EINVAL));
- }
-
- err = dmu_object_info(rwa->os, drro->drr_object, &doi);
-
- if (err != 0 && err != ENOENT)
- return (SET_ERROR(EINVAL));
- object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT;
-
- if (drro->drr_object > rwa->max_object)
- rwa->max_object = drro->drr_object;
-
- /*
- * If we are losing blkptrs or changing the block size this must
- * be a new file instance. We must clear out the previous file
- * contents before we can change this type of metadata in the dnode.
- * Raw receives will also check that the indirect structure of the
- * dnode hasn't changed.
- */
- if (err == 0) {
- uint32_t indblksz = drro->drr_indblkshift ?
- 1ULL << drro->drr_indblkshift : 0;
- int nblkptr = deduce_nblkptr(drro->drr_bonustype,
- drro->drr_bonuslen);
-
- /* nblkptr will be bounded by the bonus size and type */
- if (rwa->raw && nblkptr != drro->drr_nblkptr)
- return (SET_ERROR(EINVAL));
-
- if (drro->drr_blksz != doi.doi_data_block_size ||
- nblkptr < doi.doi_nblkptr ||
- (rwa->raw &&
- (indblksz != doi.doi_metadata_block_size ||
- drro->drr_nlevels < doi.doi_indirection))) {
- err = dmu_free_long_range(rwa->os, drro->drr_object,
- 0, DMU_OBJECT_END);
- if (err != 0)
- return (SET_ERROR(EINVAL));
- }
- }
-
- tx = dmu_tx_create(rwa->os);
- dmu_tx_hold_bonus(tx, object);
- dmu_tx_hold_write(tx, object, 0, 0);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_tx_abort(tx);
- return (err);
- }
-
- if (object == DMU_NEW_OBJECT) {
- /* currently free, want to be allocated */
- err = dmu_object_claim_dnsize(rwa->os, drro->drr_object,
- drro->drr_type, drro->drr_blksz,
- drro->drr_bonustype, drro->drr_bonuslen,
- drro->drr_dn_slots << DNODE_SHIFT, tx);
- } else if (drro->drr_type != doi.doi_type ||
- drro->drr_blksz != doi.doi_data_block_size ||
- drro->drr_bonustype != doi.doi_bonus_type ||
- drro->drr_bonuslen != doi.doi_bonus_size) {
- /* currently allocated, but with different properties */
- err = dmu_object_reclaim(rwa->os, drro->drr_object,
- drro->drr_type, drro->drr_blksz,
- drro->drr_bonustype, drro->drr_bonuslen, tx);
- }
- if (err != 0) {
- dmu_tx_commit(tx);
- return (SET_ERROR(EINVAL));
- }
-
- if (rwa->raw)
- VERIFY0(dmu_object_dirty_raw(rwa->os, drro->drr_object, tx));
-
- dmu_object_set_checksum(rwa->os, drro->drr_object,
- drro->drr_checksumtype, tx);
- dmu_object_set_compress(rwa->os, drro->drr_object,
- drro->drr_compress, tx);
-
- /* handle more restrictive dnode structuring for raw recvs */
- if (rwa->raw) {
- /*
- * Set the indirect block shift and nlevels. This will not fail
- * because we ensured all of the blocks were free earlier if
- * this is a new object.
- */
- VERIFY0(dmu_object_set_blocksize(rwa->os, drro->drr_object,
- drro->drr_blksz, drro->drr_indblkshift, tx));
- VERIFY0(dmu_object_set_nlevels(rwa->os, drro->drr_object,
- drro->drr_nlevels, tx));
- }
-
- if (data != NULL) {
- dmu_buf_t *db;
- uint32_t flags = DMU_READ_NO_PREFETCH;
-
- if (rwa->raw)
- flags |= DMU_READ_NO_DECRYPT;
-
- VERIFY0(dmu_bonus_hold_impl(rwa->os, drro->drr_object,
- FTAG, flags, &db));
- dmu_buf_will_dirty(db, tx);
-
- ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
- bcopy(data, db->db_data, DRR_OBJECT_PAYLOAD_SIZE(drro));
-
- /*
- * Raw bonus buffers have their byteorder determined by the
- * DRR_OBJECT_RANGE record.
- */
- if (rwa->byteswap && !rwa->raw) {
- dmu_object_byteswap_t byteswap =
- DMU_OT_BYTESWAP(drro->drr_bonustype);
- dmu_ot_byteswap[byteswap].ob_func(db->db_data,
- DRR_OBJECT_PAYLOAD_SIZE(drro));
- }
- dmu_buf_rele(db, FTAG);
- }
- dmu_tx_commit(tx);
-
- return (0);
-}
-
-/* ARGSUSED */
-noinline static int
-receive_freeobjects(struct receive_writer_arg *rwa,
- struct drr_freeobjects *drrfo)
-{
- uint64_t obj;
- int next_err = 0;
-
- if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
- return (SET_ERROR(EINVAL));
-
- for (obj = drrfo->drr_firstobj == 0 ? 1 : drrfo->drr_firstobj;
- obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0;
- next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) {
- dmu_object_info_t doi;
- int err;
-
- err = dmu_object_info(rwa->os, obj, &doi);
- if (err == ENOENT)
- continue;
- else if (err != 0)
- return (err);
-
- err = dmu_free_long_object(rwa->os, obj);
- if (err != 0)
- return (err);
-
- if (obj > rwa->max_object)
- rwa->max_object = obj;
- }
- if (next_err != ESRCH)
- return (next_err);
- return (0);
-}
-
-noinline static int
-receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw,
- arc_buf_t *abuf)
-{
- dmu_tx_t *tx;
- dmu_buf_t *bonus;
- int err;
-
- if (drrw->drr_offset + drrw->drr_logical_size < drrw->drr_offset ||
- !DMU_OT_IS_VALID(drrw->drr_type))
- return (SET_ERROR(EINVAL));
-
- /*
- * For resuming to work, records must be in increasing order
- * by (object, offset).
- */
- if (drrw->drr_object < rwa->last_object ||
- (drrw->drr_object == rwa->last_object &&
- drrw->drr_offset < rwa->last_offset)) {
- return (SET_ERROR(EINVAL));
- }
- rwa->last_object = drrw->drr_object;
- rwa->last_offset = drrw->drr_offset;
-
- if (rwa->last_object > rwa->max_object)
- rwa->max_object = rwa->last_object;
-
- if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0)
- return (SET_ERROR(EINVAL));
-
- tx = dmu_tx_create(rwa->os);
-
- dmu_tx_hold_write(tx, drrw->drr_object,
- drrw->drr_offset, drrw->drr_logical_size);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_tx_abort(tx);
- return (err);
- }
-
- if (rwa->raw)
- VERIFY0(dmu_object_dirty_raw(rwa->os, drrw->drr_object, tx));
-
- if (rwa->byteswap && !arc_is_encrypted(abuf) &&
- arc_get_compression(abuf) == ZIO_COMPRESS_OFF) {
- dmu_object_byteswap_t byteswap =
- DMU_OT_BYTESWAP(drrw->drr_type);
- dmu_ot_byteswap[byteswap].ob_func(abuf->b_data,
- DRR_WRITE_PAYLOAD_SIZE(drrw));
- }
-
- /* use the bonus buf to look up the dnode in dmu_assign_arcbuf */
- if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0)
- return (SET_ERROR(EINVAL));
- dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx);
-
- /*
- * Note: If the receive fails, we want the resume stream to start
- * with the same record that we last successfully received (as opposed
- * to the next record), so that we can verify that we are
- * resuming from the correct location.
- */
- save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx);
- dmu_tx_commit(tx);
- dmu_buf_rele(bonus, FTAG);
-
- return (0);
-}
-
-/*
- * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
- * streams to refer to a copy of the data that is already on the
- * system because it came in earlier in the stream. This function
- * finds the earlier copy of the data, and uses that copy instead of
- * data from the stream to fulfill this write.
- */
-static int
-receive_write_byref(struct receive_writer_arg *rwa,
- struct drr_write_byref *drrwbr)
-{
- dmu_tx_t *tx;
- int err;
- guid_map_entry_t gmesrch;
- guid_map_entry_t *gmep;
- avl_index_t where;
- objset_t *ref_os = NULL;
- int flags = DMU_READ_PREFETCH;
- dmu_buf_t *dbp;
-
- if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
- return (SET_ERROR(EINVAL));
-
- /*
- * If the GUID of the referenced dataset is different from the
- * GUID of the target dataset, find the referenced dataset.
- */
- if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
- gmesrch.guid = drrwbr->drr_refguid;
- if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch,
- &where)) == NULL) {
- return (SET_ERROR(EINVAL));
- }
- if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
- return (SET_ERROR(EINVAL));
- } else {
- ref_os = rwa->os;
- }
-
- if (drrwbr->drr_object > rwa->max_object)
- rwa->max_object = drrwbr->drr_object;
-
- if (rwa->raw)
- flags |= DMU_READ_NO_DECRYPT;
-
- /* may return either a regular db or an encrypted one */
- err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
- drrwbr->drr_refoffset, FTAG, &dbp, flags);
- if (err != 0)
- return (err);
-
- tx = dmu_tx_create(rwa->os);
-
- dmu_tx_hold_write(tx, drrwbr->drr_object,
- drrwbr->drr_offset, drrwbr->drr_length);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_tx_abort(tx);
- return (err);
- }
-
- if (rwa->raw) {
- VERIFY0(dmu_object_dirty_raw(rwa->os, drrwbr->drr_object, tx));
- dmu_copy_from_buf(rwa->os, drrwbr->drr_object,
- drrwbr->drr_offset, dbp, tx);
- } else {
- dmu_write(rwa->os, drrwbr->drr_object,
- drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
- }
- dmu_buf_rele(dbp, FTAG);
-
- /* See comment in restore_write. */
- save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx);
- dmu_tx_commit(tx);
- return (0);
-}
-
-static int
-receive_write_embedded(struct receive_writer_arg *rwa,
- struct drr_write_embedded *drrwe, void *data)
-{
- dmu_tx_t *tx;
- int err;
-
- if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset)
- return (SET_ERROR(EINVAL));
-
- if (drrwe->drr_psize > BPE_PAYLOAD_SIZE)
- return (SET_ERROR(EINVAL));
-
- if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES)
- return (SET_ERROR(EINVAL));
- if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS)
- return (SET_ERROR(EINVAL));
-
- if (drrwe->drr_object > rwa->max_object)
- rwa->max_object = drrwe->drr_object;
-
- tx = dmu_tx_create(rwa->os);
-
- dmu_tx_hold_write(tx, drrwe->drr_object,
- drrwe->drr_offset, drrwe->drr_length);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_tx_abort(tx);
- return (err);
- }
-
- dmu_write_embedded(rwa->os, drrwe->drr_object,
- drrwe->drr_offset, data, drrwe->drr_etype,
- drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize,
- rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx);
-
- /* See comment in restore_write. */
- save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx);
- dmu_tx_commit(tx);
- return (0);
-}
-
-static int
-receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
- arc_buf_t *abuf)
-{
- dmu_tx_t *tx;
- dmu_buf_t *db, *db_spill;
- int err;
-
- if (drrs->drr_length < SPA_MINBLOCKSIZE ||
- drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os)))
- return (SET_ERROR(EINVAL));
-
- if (rwa->raw) {
- if (!DMU_OT_IS_VALID(drrs->drr_type) ||
- drrs->drr_compressiontype >= ZIO_COMPRESS_FUNCTIONS ||
- drrs->drr_compressed_size == 0)
- return (SET_ERROR(EINVAL));
- }
-
- if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0)
- return (SET_ERROR(EINVAL));
-
- if (drrs->drr_object > rwa->max_object)
- rwa->max_object = drrs->drr_object;
-
- VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db));
- if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
- dmu_buf_rele(db, FTAG);
- return (err);
- }
-
- tx = dmu_tx_create(rwa->os);
-
- dmu_tx_hold_spill(tx, db->db_object);
-
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_buf_rele(db, FTAG);
- dmu_buf_rele(db_spill, FTAG);
- dmu_tx_abort(tx);
- return (err);
- }
- dmu_buf_will_dirty(db_spill, tx);
- if (rwa->raw)
- VERIFY0(dmu_object_dirty_raw(rwa->os, drrs->drr_object, tx));
-
- if (db_spill->db_size < drrs->drr_length)
- VERIFY(0 == dbuf_spill_set_blksz(db_spill,
- drrs->drr_length, tx));
- dmu_assign_arcbuf_impl(db_spill, abuf, tx);
-
- dmu_buf_rele(db, FTAG);
- dmu_buf_rele(db_spill, FTAG);
-
- dmu_tx_commit(tx);
- return (0);
-}
-
-/* ARGSUSED */
-noinline static int
-receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf)
-{
- int err;
-
- if (drrf->drr_length != -1ULL &&
- drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
- return (SET_ERROR(EINVAL));
-
- if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0)
- return (SET_ERROR(EINVAL));
-
- if (drrf->drr_object > rwa->max_object)
- rwa->max_object = drrf->drr_object;
-
- err = dmu_free_long_range(rwa->os, drrf->drr_object,
- drrf->drr_offset, drrf->drr_length);
-
- return (err);
-}
-
-static int
-receive_object_range(struct receive_writer_arg *rwa,
- struct drr_object_range *drror)
-{
- int ret;
- dmu_tx_t *tx;
- dnode_t *mdn = NULL;
- dmu_buf_t *db = NULL;
- uint64_t offset;
-
- /*
- * By default, we assume this block is in our native format
- * (ZFS_HOST_BYTEORDER). We then take into account whether
- * the send stream is byteswapped (rwa->byteswap). Finally,
- * we need to byteswap again if this particular block was
- * in non-native format on the send side.
- */
- boolean_t byteorder = ZFS_HOST_BYTEORDER ^ rwa->byteswap ^
- !!DRR_IS_RAW_BYTESWAPPED(drror->drr_flags);
-
- /*
- * Since dnode block sizes are constant, we should not need to worry
- * about making sure that the dnode block size is the same on the
- * sending and receiving sides for the time being. For non-raw sends,
- * this does not matter (and in fact we do not send a DRR_OBJECT_RANGE
- * record at all). Raw sends require this record type because the
- * encryption parameters are used to protect an entire block of bonus
- * buffers. If the size of dnode blocks ever becomes variable,
- * handling will need to be added to ensure that dnode block sizes
- * match on the sending and receiving side.
- */
- if (drror->drr_numslots != DNODES_PER_BLOCK ||
- P2PHASE(drror->drr_firstobj, DNODES_PER_BLOCK) != 0 ||
- !rwa->raw)
- return (SET_ERROR(EINVAL));
-
- if (drror->drr_firstobj > rwa->max_object)
- rwa->max_object = drror->drr_firstobj;
-
- offset = drror->drr_firstobj * sizeof (dnode_phys_t);
- mdn = DMU_META_DNODE(rwa->os);
-
- tx = dmu_tx_create(rwa->os);
- ret = dmu_tx_assign(tx, TXG_WAIT);
- if (ret != 0) {
- dmu_tx_abort(tx);
- return (ret);
- }
-
- ret = dmu_buf_hold_by_dnode(mdn, offset, FTAG, &db,
- DMU_READ_PREFETCH | DMU_READ_NO_DECRYPT);
- if (ret != 0) {
- dmu_tx_commit(tx);
- return (ret);
- }
-
- /*
- * Convert the buffer associated with this range of dnodes to a
- * raw buffer. This ensures that it will be written out as a raw
- * buffer when we fill in the dnode objects in future records.
- * Since we are commiting this tx now, it is technically possible
- * for the dnode block to end up on-disk with the incorrect MAC.
- * Despite this, the dataset is marked as inconsistent so no other
- * code paths (apart from scrubs) will attempt to read this data.
- * Scrubs will not be effected by this either since scrubs only
- * read raw data and do not attempt to check the MAC.
- */
- dmu_convert_to_raw(db, byteorder, drror->drr_salt, drror->drr_iv,
- drror->drr_mac, tx);
- dmu_buf_rele(db, FTAG);
- dmu_tx_commit(tx);
- return (0);
-}
-
-/* used to destroy the drc_ds on error */
-static void
-dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc)
-{
- ds_hold_flags_t dsflags = (drc->drc_raw) ? 0 : DS_HOLD_FLAG_DECRYPT;
-
- /*
- * Wait for the txg sync before cleaning up the receive. For
- * resumable receives, this ensures that our resume state has
- * been written out to disk. For raw receives, this ensures
- * that the user accounting code will not attempt to do anything
- * after we stopped receiving the dataset.
- */
- txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0);
-
- if (drc->drc_resumable) {
- dsl_dataset_disown(drc->drc_ds, dsflags, dmu_recv_tag);
- } else {
- char name[ZFS_MAX_DATASET_NAME_LEN];
- dsl_dataset_name(drc->drc_ds, name);
- dsl_dataset_disown(drc->drc_ds, dsflags, dmu_recv_tag);
- (void) dsl_destroy_head(name);
- }
-}
-
-static void
-receive_cksum(struct receive_arg *ra, int len, void *buf)
-{
- if (ra->byteswap) {
- (void) fletcher_4_incremental_byteswap(buf, len, &ra->cksum);
- } else {
- (void) fletcher_4_incremental_native(buf, len, &ra->cksum);
- }
-}
-
-/*
- * Read the payload into a buffer of size len, and update the current record's
- * payload field.
- * Allocate ra->next_rrd and read the next record's header into
- * ra->next_rrd->header.
- * Verify checksum of payload and next record.
- */
-static int
-receive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf)
-{
- int err;
- zio_cksum_t cksum_orig;
- zio_cksum_t *cksump;
-
- if (len != 0) {
- ASSERT3U(len, <=, SPA_MAXBLOCKSIZE);
- err = receive_read(ra, len, buf);
- if (err != 0)
- return (err);
- receive_cksum(ra, len, buf);
-
- /* note: rrd is NULL when reading the begin record's payload */
- if (ra->rrd != NULL) {
- ra->rrd->payload = buf;
- ra->rrd->payload_size = len;
- ra->rrd->bytes_read = ra->bytes_read;
- }
- }
-
- ra->prev_cksum = ra->cksum;
-
- ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP);
- err = receive_read(ra, sizeof (ra->next_rrd->header),
- &ra->next_rrd->header);
- ra->next_rrd->bytes_read = ra->bytes_read;
-
- if (err != 0) {
- kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
- ra->next_rrd = NULL;
- return (err);
- }
- if (ra->next_rrd->header.drr_type == DRR_BEGIN) {
- kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
- ra->next_rrd = NULL;
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Note: checksum is of everything up to but not including the
- * checksum itself.
- */
- ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
- ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t));
- receive_cksum(ra,
- offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
- &ra->next_rrd->header);
-
- cksum_orig = ra->next_rrd->header.drr_u.drr_checksum.drr_checksum;
- cksump = &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum;
-
- if (ra->byteswap)
- byteswap_record(&ra->next_rrd->header);
-
- if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) &&
- !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) {
- kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
- ra->next_rrd = NULL;
- return (SET_ERROR(ECKSUM));
- }
-
- receive_cksum(ra, sizeof (cksum_orig), &cksum_orig);
-
- return (0);
-}
-
-static void
-objlist_create(struct objlist *list)
-{
- list_create(&list->list, sizeof (struct receive_objnode),
- offsetof(struct receive_objnode, node));
- list->last_lookup = 0;
-}
-
-static void
-objlist_destroy(struct objlist *list)
-{
- struct receive_objnode *n;
-
- for (n = list_remove_head(&list->list);
- n != NULL; n = list_remove_head(&list->list)) {
- kmem_free(n, sizeof (*n));
- }
- list_destroy(&list->list);
-}
-
-/*
- * This function looks through the objlist to see if the specified object number
- * is contained in the objlist. In the process, it will remove all object
- * numbers in the list that are smaller than the specified object number. Thus,
- * any lookup of an object number smaller than a previously looked up object
- * number will always return false; therefore, all lookups should be done in
- * ascending order.
- */
-static boolean_t
-objlist_exists(struct objlist *list, uint64_t object)
-{
- struct receive_objnode *node = list_head(&list->list);
- ASSERT3U(object, >=, list->last_lookup);
- list->last_lookup = object;
- while (node != NULL && node->object < object) {
- VERIFY3P(node, ==, list_remove_head(&list->list));
- kmem_free(node, sizeof (*node));
- node = list_head(&list->list);
- }
- return (node != NULL && node->object == object);
-}
-
-/*
- * The objlist is a list of object numbers stored in ascending order. However,
- * the insertion of new object numbers does not seek out the correct location to
- * store a new object number; instead, it appends it to the list for simplicity.
- * Thus, any users must take care to only insert new object numbers in ascending
- * order.
- */
-static void
-objlist_insert(struct objlist *list, uint64_t object)
-{
- struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP);
- node->object = object;
-#ifdef ZFS_DEBUG
- {
- struct receive_objnode *last_object = list_tail(&list->list);
- uint64_t last_objnum = (last_object != NULL ? last_object->object : 0);
- ASSERT3U(node->object, >, last_objnum);
- }
-#endif
- list_insert_tail(&list->list, node);
-}
-
-/*
- * Issue the prefetch reads for any necessary indirect blocks.
- *
- * We use the object ignore list to tell us whether or not to issue prefetches
- * for a given object. We do this for both correctness (in case the blocksize
- * of an object has changed) and performance (if the object doesn't exist, don't
- * needlessly try to issue prefetches). We also trim the list as we go through
- * the stream to prevent it from growing to an unbounded size.
- *
- * The object numbers within will always be in sorted order, and any write
- * records we see will also be in sorted order, but they're not sorted with
- * respect to each other (i.e. we can get several object records before
- * receiving each object's write records). As a result, once we've reached a
- * given object number, we can safely remove any reference to lower object
- * numbers in the ignore list. In practice, we receive up to 32 object records
- * before receiving write records, so the list can have up to 32 nodes in it.
- */
-/* ARGSUSED */
-static void
-receive_read_prefetch(struct receive_arg *ra,
- uint64_t object, uint64_t offset, uint64_t length)
-{
- if (!objlist_exists(&ra->ignore_objlist, object)) {
- dmu_prefetch(ra->os, object, 1, offset, length,
- ZIO_PRIORITY_SYNC_READ);
- }
-}
-
-/*
- * Read records off the stream, issuing any necessary prefetches.
- */
-static int
-receive_read_record(struct receive_arg *ra)
-{
- int err;
-
- switch (ra->rrd->header.drr_type) {
- case DRR_OBJECT:
- {
- struct drr_object *drro = &ra->rrd->header.drr_u.drr_object;
- uint32_t size = DRR_OBJECT_PAYLOAD_SIZE(drro);
- void *buf = kmem_zalloc(size, KM_SLEEP);
- dmu_object_info_t doi;
-
- err = receive_read_payload_and_next_header(ra, size, buf);
- if (err != 0) {
- kmem_free(buf, size);
- return (err);
- }
- err = dmu_object_info(ra->os, drro->drr_object, &doi);
- /*
- * See receive_read_prefetch for an explanation why we're
- * storing this object in the ignore_obj_list.
- */
- if (err == ENOENT ||
- (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) {
- objlist_insert(&ra->ignore_objlist, drro->drr_object);
- err = 0;
- }
- return (err);
- }
- case DRR_FREEOBJECTS:
- {
- err = receive_read_payload_and_next_header(ra, 0, NULL);
- return (err);
- }
- case DRR_WRITE:
- {
- struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write;
- arc_buf_t *abuf;
- boolean_t is_meta = DMU_OT_IS_METADATA(drrw->drr_type);
-
- if (ra->raw) {
- boolean_t byteorder = ZFS_HOST_BYTEORDER ^
- !!DRR_IS_RAW_BYTESWAPPED(drrw->drr_flags) ^
- ra->byteswap;
-
- abuf = arc_loan_raw_buf(dmu_objset_spa(ra->os),
- drrw->drr_object, byteorder, drrw->drr_salt,
- drrw->drr_iv, drrw->drr_mac, drrw->drr_type,
- drrw->drr_compressed_size, drrw->drr_logical_size,
- drrw->drr_compressiontype);
- } else if (DRR_WRITE_COMPRESSED(drrw)) {
- ASSERT3U(drrw->drr_compressed_size, >, 0);
- ASSERT3U(drrw->drr_logical_size, >=,
- drrw->drr_compressed_size);
- ASSERT(!is_meta);
- abuf = arc_loan_compressed_buf(
- dmu_objset_spa(ra->os),
- drrw->drr_compressed_size, drrw->drr_logical_size,
- drrw->drr_compressiontype);
- } else {
- abuf = arc_loan_buf(dmu_objset_spa(ra->os),
- is_meta, drrw->drr_logical_size);
- }
-
- err = receive_read_payload_and_next_header(ra,
- DRR_WRITE_PAYLOAD_SIZE(drrw), abuf->b_data);
- if (err != 0) {
- dmu_return_arcbuf(abuf);
- return (err);
- }
- ra->rrd->arc_buf = abuf;
- receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset,
- drrw->drr_logical_size);
- return (err);
- }
- case DRR_WRITE_BYREF:
- {
- struct drr_write_byref *drrwb =
- &ra->rrd->header.drr_u.drr_write_byref;
- err = receive_read_payload_and_next_header(ra, 0, NULL);
- receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset,
- drrwb->drr_length);
- return (err);
- }
- case DRR_WRITE_EMBEDDED:
- {
- struct drr_write_embedded *drrwe =
- &ra->rrd->header.drr_u.drr_write_embedded;
- uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8);
- void *buf = kmem_zalloc(size, KM_SLEEP);
-
- err = receive_read_payload_and_next_header(ra, size, buf);
- if (err != 0) {
- kmem_free(buf, size);
- return (err);
- }
-
- receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset,
- drrwe->drr_length);
- return (err);
- }
- case DRR_FREE:
- {
- /*
- * It might be beneficial to prefetch indirect blocks here, but
- * we don't really have the data to decide for sure.
- */
- err = receive_read_payload_and_next_header(ra, 0, NULL);
- return (err);
- }
- case DRR_END:
- {
- struct drr_end *drre = &ra->rrd->header.drr_u.drr_end;
- if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum))
- return (SET_ERROR(ECKSUM));
- return (0);
- }
- case DRR_SPILL:
- {
- struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill;
- arc_buf_t *abuf;
- int len = DRR_SPILL_PAYLOAD_SIZE(drrs);
-
- /* DRR_SPILL records are either raw or uncompressed */
- if (ra->raw) {
- boolean_t byteorder = ZFS_HOST_BYTEORDER ^
- !!DRR_IS_RAW_BYTESWAPPED(drrs->drr_flags) ^
- ra->byteswap;
-
- abuf = arc_loan_raw_buf(dmu_objset_spa(ra->os),
- drrs->drr_object, byteorder, drrs->drr_salt,
- drrs->drr_iv, drrs->drr_mac, drrs->drr_type,
- drrs->drr_compressed_size, drrs->drr_length,
- drrs->drr_compressiontype);
- } else {
- abuf = arc_loan_buf(dmu_objset_spa(ra->os),
- DMU_OT_IS_METADATA(drrs->drr_type),
- drrs->drr_length);
- }
-
- err = receive_read_payload_and_next_header(ra, len,
- abuf->b_data);
- if (err != 0) {
- dmu_return_arcbuf(abuf);
- return (err);
- }
- ra->rrd->arc_buf = abuf;
- return (err);
- }
- case DRR_OBJECT_RANGE:
- {
- err = receive_read_payload_and_next_header(ra, 0, NULL);
- return (err);
- }
- default:
- return (SET_ERROR(EINVAL));
- }
-}
-
-static void
-dprintf_drr(struct receive_record_arg *rrd, int err)
-{
- switch (rrd->header.drr_type) {
- case DRR_OBJECT:
- {
- struct drr_object *drro = &rrd->header.drr_u.drr_object;
- dprintf("drr_type = OBJECT obj = %llu type = %u "
- "bonustype = %u blksz = %u bonuslen = %u cksumtype = %u "
- "compress = %u dn_slots = %u err = %d\n",
- drro->drr_object, drro->drr_type, drro->drr_bonustype,
- drro->drr_blksz, drro->drr_bonuslen,
- drro->drr_checksumtype, drro->drr_compress,
- drro->drr_dn_slots, err);
- break;
- }
- case DRR_FREEOBJECTS:
- {
- struct drr_freeobjects *drrfo =
- &rrd->header.drr_u.drr_freeobjects;
- dprintf("drr_type = FREEOBJECTS firstobj = %llu "
- "numobjs = %llu err = %d\n",
- drrfo->drr_firstobj, drrfo->drr_numobjs, err);
- break;
- }
- case DRR_WRITE:
- {
- struct drr_write *drrw = &rrd->header.drr_u.drr_write;
- dprintf("drr_type = WRITE obj = %llu type = %u offset = %llu "
- "lsize = %llu cksumtype = %u cksumflags = %u "
- "compress = %u psize = %llu err = %d\n",
- drrw->drr_object, drrw->drr_type, drrw->drr_offset,
- drrw->drr_logical_size, drrw->drr_checksumtype,
- drrw->drr_flags, drrw->drr_compressiontype,
- drrw->drr_compressed_size, err);
- break;
- }
- case DRR_WRITE_BYREF:
- {
- struct drr_write_byref *drrwbr =
- &rrd->header.drr_u.drr_write_byref;
- dprintf("drr_type = WRITE_BYREF obj = %llu offset = %llu "
- "length = %llu toguid = %llx refguid = %llx "
- "refobject = %llu refoffset = %llu cksumtype = %u "
- "cksumflags = %u err = %d\n",
- drrwbr->drr_object, drrwbr->drr_offset,
- drrwbr->drr_length, drrwbr->drr_toguid,
- drrwbr->drr_refguid, drrwbr->drr_refobject,
- drrwbr->drr_refoffset, drrwbr->drr_checksumtype,
- drrwbr->drr_flags, err);
- break;
- }
- case DRR_WRITE_EMBEDDED:
- {
- struct drr_write_embedded *drrwe =
- &rrd->header.drr_u.drr_write_embedded;
- dprintf("drr_type = WRITE_EMBEDDED obj = %llu offset = %llu "
- "length = %llu compress = %u etype = %u lsize = %u "
- "psize = %u err = %d\n",
- drrwe->drr_object, drrwe->drr_offset, drrwe->drr_length,
- drrwe->drr_compression, drrwe->drr_etype,
- drrwe->drr_lsize, drrwe->drr_psize, err);
- break;
- }
- case DRR_FREE:
- {
- struct drr_free *drrf = &rrd->header.drr_u.drr_free;
- dprintf("drr_type = FREE obj = %llu offset = %llu "
- "length = %lld err = %d\n",
- drrf->drr_object, drrf->drr_offset, drrf->drr_length,
- err);
- break;
- }
- case DRR_SPILL:
- {
- struct drr_spill *drrs = &rrd->header.drr_u.drr_spill;
- dprintf("drr_type = SPILL obj = %llu length = %llu "
- "err = %d\n", drrs->drr_object, drrs->drr_length, err);
- break;
- }
- default:
- return;
- }
-}
-
-/*
- * Commit the records to the pool.
- */
-static int
-receive_process_record(struct receive_writer_arg *rwa,
- struct receive_record_arg *rrd)
-{
- int err;
-
- /* Processing in order, therefore bytes_read should be increasing. */
- ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read);
- rwa->bytes_read = rrd->bytes_read;
-
- switch (rrd->header.drr_type) {
- case DRR_OBJECT:
- {
- struct drr_object *drro = &rrd->header.drr_u.drr_object;
- err = receive_object(rwa, drro, rrd->payload);
- kmem_free(rrd->payload, rrd->payload_size);
- rrd->payload = NULL;
- break;
- }
- case DRR_FREEOBJECTS:
- {
- struct drr_freeobjects *drrfo =
- &rrd->header.drr_u.drr_freeobjects;
- err = receive_freeobjects(rwa, drrfo);
- break;
- }
- case DRR_WRITE:
- {
- struct drr_write *drrw = &rrd->header.drr_u.drr_write;
- err = receive_write(rwa, drrw, rrd->arc_buf);
- /* if receive_write() is successful, it consumes the arc_buf */
- if (err != 0)
- dmu_return_arcbuf(rrd->arc_buf);
- rrd->arc_buf = NULL;
- rrd->payload = NULL;
- break;
- }
- case DRR_WRITE_BYREF:
- {
- struct drr_write_byref *drrwbr =
- &rrd->header.drr_u.drr_write_byref;
- err = receive_write_byref(rwa, drrwbr);
- break;
- }
- case DRR_WRITE_EMBEDDED:
- {
- struct drr_write_embedded *drrwe =
- &rrd->header.drr_u.drr_write_embedded;
- err = receive_write_embedded(rwa, drrwe, rrd->payload);
- kmem_free(rrd->payload, rrd->payload_size);
- rrd->payload = NULL;
- break;
- }
- case DRR_FREE:
- {
- struct drr_free *drrf = &rrd->header.drr_u.drr_free;
- err = receive_free(rwa, drrf);
- break;
- }
- case DRR_SPILL:
- {
- struct drr_spill *drrs = &rrd->header.drr_u.drr_spill;
- err = receive_spill(rwa, drrs, rrd->arc_buf);
- /* if receive_spill() is successful, it consumes the arc_buf */
- if (err != 0)
- dmu_return_arcbuf(rrd->arc_buf);
- rrd->arc_buf = NULL;
- rrd->payload = NULL;
- break;
- }
- case DRR_OBJECT_RANGE:
- {
- struct drr_object_range *drror =
- &rrd->header.drr_u.drr_object_range;
- return (receive_object_range(rwa, drror));
- }
- default:
- return (SET_ERROR(EINVAL));
- }
-
- if (err != 0)
- dprintf_drr(rrd, err);
-
- return (err);
-}
-
-/*
- * dmu_recv_stream's worker thread; pull records off the queue, and then call
- * receive_process_record When we're done, signal the main thread and exit.
- */
-static void
-receive_writer_thread(void *arg)
-{
- struct receive_writer_arg *rwa = arg;
- struct receive_record_arg *rrd;
- fstrans_cookie_t cookie = spl_fstrans_mark();
-
- for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker;
- rrd = bqueue_dequeue(&rwa->q)) {
- /*
- * If there's an error, the main thread will stop putting things
- * on the queue, but we need to clear everything in it before we
- * can exit.
- */
- if (rwa->err == 0) {
- rwa->err = receive_process_record(rwa, rrd);
- } else if (rrd->arc_buf != NULL) {
- dmu_return_arcbuf(rrd->arc_buf);
- rrd->arc_buf = NULL;
- rrd->payload = NULL;
- } else if (rrd->payload != NULL) {
- kmem_free(rrd->payload, rrd->payload_size);
- rrd->payload = NULL;
- }
- kmem_free(rrd, sizeof (*rrd));
- }
- kmem_free(rrd, sizeof (*rrd));
- mutex_enter(&rwa->mutex);
- rwa->done = B_TRUE;
- cv_signal(&rwa->cv);
- mutex_exit(&rwa->mutex);
- spl_fstrans_unmark(cookie);
- thread_exit();
-}
-
-static int
-resume_check(struct receive_arg *ra, nvlist_t *begin_nvl)
-{
- uint64_t val;
- objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset;
- uint64_t dsobj = dmu_objset_id(ra->os);
- uint64_t resume_obj, resume_off;
-
- if (nvlist_lookup_uint64(begin_nvl,
- "resume_object", &resume_obj) != 0 ||
- nvlist_lookup_uint64(begin_nvl,
- "resume_offset", &resume_off) != 0) {
- return (SET_ERROR(EINVAL));
- }
- VERIFY0(zap_lookup(mos, dsobj,
- DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val));
- if (resume_obj != val)
- return (SET_ERROR(EINVAL));
- VERIFY0(zap_lookup(mos, dsobj,
- DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val));
- if (resume_off != val)
- return (SET_ERROR(EINVAL));
-
- return (0);
-}
-
-/*
- * Read in the stream's records, one by one, and apply them to the pool. There
- * are two threads involved; the thread that calls this function will spin up a
- * worker thread, read the records off the stream one by one, and issue
- * prefetches for any necessary indirect blocks. It will then push the records
- * onto an internal blocking queue. The worker thread will pull the records off
- * the queue, and actually write the data into the DMU. This way, the worker
- * thread doesn't have to wait for reads to complete, since everything it needs
- * (the indirect blocks) will be prefetched.
- *
- * NB: callers *must* call dmu_recv_end() if this succeeds.
- */
-int
-dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
- int cleanup_fd, uint64_t *action_handlep)
-{
- int err = 0;
- struct receive_arg *ra;
- struct receive_writer_arg *rwa;
- int featureflags;
- uint32_t payloadlen;
- void *payload;
- nvlist_t *begin_nvl = NULL;
-
- ra = kmem_zalloc(sizeof (*ra), KM_SLEEP);
- rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP);
-
- ra->byteswap = drc->drc_byteswap;
- ra->raw = drc->drc_raw;
- ra->cksum = drc->drc_cksum;
- ra->vp = vp;
- ra->voff = *voffp;
-
- if (dsl_dataset_is_zapified(drc->drc_ds)) {
- (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset,
- drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES,
- sizeof (ra->bytes_read), 1, &ra->bytes_read);
- }
-
- objlist_create(&ra->ignore_objlist);
-
- /* these were verified in dmu_recv_begin */
- ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==,
- DMU_SUBSTREAM);
- ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES);
-
- /*
- * Open the objset we are modifying.
- */
- VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra->os));
-
- ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT);
-
- featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
- ra->featureflags = featureflags;
-
- /* embedded data is incompatible with encrypted datasets */
- if (ra->os->os_encrypted &&
- (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) {
- err = SET_ERROR(EINVAL);
- goto out;
- }
-
- /* if this stream is dedup'ed, set up the avl tree for guid mapping */
- if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
- minor_t minor;
-
- if (cleanup_fd == -1) {
- err = SET_ERROR(EBADF);
- goto out;
- }
- err = zfs_onexit_fd_hold(cleanup_fd, &minor);
- if (err != 0) {
- cleanup_fd = -1;
- goto out;
- }
-
- if (*action_handlep == 0) {
- rwa->guid_to_ds_map =
- kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
- avl_create(rwa->guid_to_ds_map, guid_compare,
- sizeof (guid_map_entry_t),
- offsetof(guid_map_entry_t, avlnode));
- err = zfs_onexit_add_cb(minor,
- free_guid_map_onexit, rwa->guid_to_ds_map,
- action_handlep);
- if (err != 0)
- goto out;
- } else {
- err = zfs_onexit_cb_data(minor, *action_handlep,
- (void **)&rwa->guid_to_ds_map);
- if (err != 0)
- goto out;
- }
-
- drc->drc_guid_to_ds_map = rwa->guid_to_ds_map;
- }
-
- payloadlen = drc->drc_drr_begin->drr_payloadlen;
- payload = NULL;
- if (payloadlen != 0)
- payload = kmem_alloc(payloadlen, KM_SLEEP);
-
- err = receive_read_payload_and_next_header(ra, payloadlen, payload);
- if (err != 0) {
- if (payloadlen != 0)
- kmem_free(payload, payloadlen);
- goto out;
- }
- if (payloadlen != 0) {
- err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP);
- kmem_free(payload, payloadlen);
- if (err != 0)
- goto out;
- }
-
- /* handle DSL encryption key payload */
- if (featureflags & DMU_BACKUP_FEATURE_RAW) {
- nvlist_t *keynvl = NULL;
-
- ASSERT(ra->os->os_encrypted);
- ASSERT(drc->drc_raw);
-
- err = nvlist_lookup_nvlist(begin_nvl, "crypt_keydata", &keynvl);
- if (err != 0)
- goto out;
-
- err = dsl_crypto_recv_key(spa_name(ra->os->os_spa),
- drc->drc_ds->ds_object, drc->drc_drrb->drr_type,
- keynvl);
- if (err != 0)
- goto out;
- }
-
- if (featureflags & DMU_BACKUP_FEATURE_RESUMING) {
- err = resume_check(ra, begin_nvl);
- if (err != 0)
- goto out;
- }
-
- (void) bqueue_init(&rwa->q, zfs_recv_queue_length,
- offsetof(struct receive_record_arg, node));
- cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL);
- mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL);
- rwa->os = ra->os;
- rwa->byteswap = drc->drc_byteswap;
- rwa->resumable = drc->drc_resumable;
- rwa->raw = drc->drc_raw;
-
- (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc,
- TS_RUN, minclsyspri);
- /*
- * We're reading rwa->err without locks, which is safe since we are the
- * only reader, and the worker thread is the only writer. It's ok if we
- * miss a write for an iteration or two of the loop, since the writer
- * thread will keep freeing records we send it until we send it an eos
- * marker.
- *
- * We can leave this loop in 3 ways: First, if rwa->err is
- * non-zero. In that case, the writer thread will free the rrd we just
- * pushed. Second, if we're interrupted; in that case, either it's the
- * first loop and ra->rrd was never allocated, or it's later and ra->rrd
- * has been handed off to the writer thread who will free it. Finally,
- * if receive_read_record fails or we're at the end of the stream, then
- * we free ra->rrd and exit.
- */
- while (rwa->err == 0) {
- if (issig(JUSTLOOKING) && issig(FORREAL)) {
- err = SET_ERROR(EINTR);
- break;
- }
-
- ASSERT3P(ra->rrd, ==, NULL);
- ra->rrd = ra->next_rrd;
- ra->next_rrd = NULL;
- /* Allocates and loads header into ra->next_rrd */
- err = receive_read_record(ra);
-
- if (ra->rrd->header.drr_type == DRR_END || err != 0) {
- kmem_free(ra->rrd, sizeof (*ra->rrd));
- ra->rrd = NULL;
- break;
- }
-
- bqueue_enqueue(&rwa->q, ra->rrd,
- sizeof (struct receive_record_arg) + ra->rrd->payload_size);
- ra->rrd = NULL;
- }
- if (ra->next_rrd == NULL)
- ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP);
- ra->next_rrd->eos_marker = B_TRUE;
- bqueue_enqueue(&rwa->q, ra->next_rrd, 1);
-
- mutex_enter(&rwa->mutex);
- while (!rwa->done) {
- cv_wait(&rwa->cv, &rwa->mutex);
- }
- mutex_exit(&rwa->mutex);
-
- /*
- * If we are receiving a full stream as a clone, all object IDs which
- * are greater than the maximum ID referenced in the stream are
- * by definition unused and must be freed.
- */
- if (drc->drc_clone && drc->drc_drrb->drr_fromguid == 0) {
- uint64_t obj = rwa->max_object + 1;
- int free_err = 0;
- int next_err = 0;
-
- while (next_err == 0) {
- free_err = dmu_free_long_object(rwa->os, obj);
- if (free_err != 0 && free_err != ENOENT)
- break;
-
- next_err = dmu_object_next(rwa->os, &obj, FALSE, 0);
- }
-
- if (err == 0) {
- if (free_err != 0 && free_err != ENOENT)
- err = free_err;
- else if (next_err != ESRCH)
- err = next_err;
- }
- }
-
- cv_destroy(&rwa->cv);
- mutex_destroy(&rwa->mutex);
- bqueue_destroy(&rwa->q);
- if (err == 0)
- err = rwa->err;
-
-out:
- nvlist_free(begin_nvl);
- if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
- zfs_onexit_fd_rele(cleanup_fd);
-
- if (err != 0) {
- /*
- * Clean up references. If receive is not resumable,
- * destroy what we created, so we don't leave it in
- * the inconsistent state.
- */
- dmu_recv_cleanup_ds(drc);
- }
-
- *voffp = ra->voff;
- objlist_destroy(&ra->ignore_objlist);
- kmem_free(ra, sizeof (*ra));
- kmem_free(rwa, sizeof (*rwa));
- return (err);
-}
-
-static int
-dmu_recv_end_check(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_cookie_t *drc = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- int error;
-
- ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag);
-
- if (!drc->drc_newfs) {
- dsl_dataset_t *origin_head;
-
- error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head);
- if (error != 0)
- return (error);
- if (drc->drc_force) {
- /*
- * We will destroy any snapshots in tofs (i.e. before
- * origin_head) that are after the origin (which is
- * the snap before drc_ds, because drc_ds can not
- * have any snaps of its own).
- */
- uint64_t obj;
-
- obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj;
- while (obj !=
- dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) {
- dsl_dataset_t *snap;
- error = dsl_dataset_hold_obj(dp, obj, FTAG,
- &snap);
- if (error != 0)
- break;
- if (snap->ds_dir != origin_head->ds_dir)
- error = SET_ERROR(EINVAL);
- if (error == 0) {
- error = dsl_destroy_snapshot_check_impl(
- snap, B_FALSE);
- }
- obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
- dsl_dataset_rele(snap, FTAG);
- if (error != 0)
- break;
- }
- if (error != 0) {
- dsl_dataset_rele(origin_head, FTAG);
- return (error);
- }
- }
- error = dsl_dataset_clone_swap_check_impl(drc->drc_ds,
- origin_head, drc->drc_force, drc->drc_owner, tx);
- if (error != 0) {
- dsl_dataset_rele(origin_head, FTAG);
- return (error);
- }
- error = dsl_dataset_snapshot_check_impl(origin_head,
- drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred);
- dsl_dataset_rele(origin_head, FTAG);
- if (error != 0)
- return (error);
-
- error = dsl_destroy_head_check_impl(drc->drc_ds, 1);
- } else {
- error = dsl_dataset_snapshot_check_impl(drc->drc_ds,
- drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred);
- }
- return (error);
-}
-
-static void
-dmu_recv_end_sync(void *arg, dmu_tx_t *tx)
-{
- dmu_recv_cookie_t *drc = arg;
- dsl_pool_t *dp = dmu_tx_pool(tx);
- boolean_t encrypted = drc->drc_ds->ds_dir->dd_crypto_obj != 0;
-
- spa_history_log_internal_ds(drc->drc_ds, "finish receiving",
- tx, "snap=%s", drc->drc_tosnap);
-
- if (!drc->drc_newfs) {
- dsl_dataset_t *origin_head;
-
- VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG,
- &origin_head));
-
- if (drc->drc_force) {
- /*
- * Destroy any snapshots of drc_tofs (origin_head)
- * after the origin (the snap before drc_ds).
- */
- uint64_t obj;
-
- obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj;
- while (obj !=
- dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) {
- dsl_dataset_t *snap;
- VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG,
- &snap));
- ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir);
- obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
- dsl_destroy_snapshot_sync_impl(snap,
- B_FALSE, tx);
- dsl_dataset_rele(snap, FTAG);
- }
- }
- VERIFY3P(drc->drc_ds->ds_prev, ==,
- origin_head->ds_prev);
-
- dsl_dataset_clone_swap_sync_impl(drc->drc_ds,
- origin_head, tx);
- dsl_dataset_snapshot_sync_impl(origin_head,
- drc->drc_tosnap, tx);
-
- /* set snapshot's creation time and guid */
- dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx);
- dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time =
- drc->drc_drrb->drr_creation_time;
- dsl_dataset_phys(origin_head->ds_prev)->ds_guid =
- drc->drc_drrb->drr_toguid;
- dsl_dataset_phys(origin_head->ds_prev)->ds_flags &=
- ~DS_FLAG_INCONSISTENT;
-
- dmu_buf_will_dirty(origin_head->ds_dbuf, tx);
- dsl_dataset_phys(origin_head)->ds_flags &=
- ~DS_FLAG_INCONSISTENT;
-
- drc->drc_newsnapobj =
- dsl_dataset_phys(origin_head)->ds_prev_snap_obj;
-
- dsl_dataset_rele(origin_head, FTAG);
- dsl_destroy_head_sync_impl(drc->drc_ds, tx);
-
- if (drc->drc_owner != NULL)
- VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner);
- } else {
- dsl_dataset_t *ds = drc->drc_ds;
-
- dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx);
-
- /* set snapshot's creation time and guid */
- dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
- dsl_dataset_phys(ds->ds_prev)->ds_creation_time =
- drc->drc_drrb->drr_creation_time;
- dsl_dataset_phys(ds->ds_prev)->ds_guid =
- drc->drc_drrb->drr_toguid;
- dsl_dataset_phys(ds->ds_prev)->ds_flags &=
- ~DS_FLAG_INCONSISTENT;
-
- dmu_buf_will_dirty(ds->ds_dbuf, tx);
- dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT;
- if (dsl_dataset_has_resume_receive_state(ds)) {
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_FROMGUID, tx);
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_OBJECT, tx);
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_OFFSET, tx);
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_BYTES, tx);
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_TOGUID, tx);
- (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
- DS_FIELD_RESUME_TONAME, tx);
- }
- drc->drc_newsnapobj =
- dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj;
- }
- zvol_create_minors(dp->dp_spa, drc->drc_tofs, B_TRUE);
-
- /*
- * Release the hold from dmu_recv_begin. This must be done before
- * we return to open context, so that when we free the dataset's dnode
- * we can evict its bonus buffer. Since the dataset may be destroyed
- * at this point (and therefore won't have a valid pointer to the spa)
- * we release the key mapping manually here while we do have a valid
- * pointer, if it exists.
- */
- if (!drc->drc_raw && encrypted) {
- (void) spa_keystore_remove_mapping(dmu_tx_pool(tx)->dp_spa,
- drc->drc_ds->ds_object, drc->drc_ds);
- }
- dsl_dataset_disown(drc->drc_ds, 0, dmu_recv_tag);
- drc->drc_ds = NULL;
-}
-
-static int
-add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj,
- boolean_t raw)
-{
- dsl_pool_t *dp;
- dsl_dataset_t *snapds;
- guid_map_entry_t *gmep;
- ds_hold_flags_t dsflags = (raw) ? 0 : DS_HOLD_FLAG_DECRYPT;
- int err;
-
- ASSERT(guid_map != NULL);
-
- err = dsl_pool_hold(name, FTAG, &dp);
- if (err != 0)
- return (err);
- gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP);
- err = dsl_dataset_hold_obj_flags(dp, snapobj, dsflags, gmep, &snapds);
- if (err == 0) {
- gmep->guid = dsl_dataset_phys(snapds)->ds_guid;
- gmep->raw = raw;
- gmep->gme_ds = snapds;
- avl_add(guid_map, gmep);
- dsl_dataset_long_hold(snapds, gmep);
- } else {
- kmem_free(gmep, sizeof (*gmep));
- }
-
- dsl_pool_rele(dp, FTAG);
- return (err);
-}
-
-static int dmu_recv_end_modified_blocks = 3;
-
-static int
-dmu_recv_existing_end(dmu_recv_cookie_t *drc)
-{
-#ifdef _KERNEL
- /*
- * We will be destroying the ds; make sure its origin is unmounted if
- * necessary.
- */
- char name[ZFS_MAX_DATASET_NAME_LEN];
- dsl_dataset_name(drc->drc_ds, name);
- zfs_destroy_unmount_origin(name);
-#endif
-
- return (dsl_sync_task(drc->drc_tofs,
- dmu_recv_end_check, dmu_recv_end_sync, drc,
- dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL));
-}
-
-static int
-dmu_recv_new_end(dmu_recv_cookie_t *drc)
-{
- return (dsl_sync_task(drc->drc_tofs,
- dmu_recv_end_check, dmu_recv_end_sync, drc,
- dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL));
-}
-
-int
-dmu_recv_end(dmu_recv_cookie_t *drc, void *owner)
-{
- int error;
-
- drc->drc_owner = owner;
-
- if (drc->drc_newfs)
- error = dmu_recv_new_end(drc);
- else
- error = dmu_recv_existing_end(drc);
-
- if (error != 0) {
- dmu_recv_cleanup_ds(drc);
- } else if (drc->drc_guid_to_ds_map != NULL) {
- (void) add_ds_to_guidmap(drc->drc_tofs, drc->drc_guid_to_ds_map,
- drc->drc_newsnapobj, drc->drc_raw);
- }
- return (error);
-}
-
-/*
- * Return TRUE if this objset is currently being received into.
- */
-boolean_t
-dmu_objset_is_receiving(objset_t *os)
-{
- return (os->os_dsl_dataset != NULL &&
- os->os_dsl_dataset->ds_owner == dmu_recv_tag);
-}
-
-#if defined(_KERNEL)
-module_param(zfs_send_corrupt_data, int, 0644);
-MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data");
+module_param(zfs_send_queue_length, int, 0644);
+MODULE_PARM_DESC(zfs_send_queue_length, "Maximum send queue length");
#endif
projects / mirror_zfs.git / blobdiff