1efb80947Sahrens /*
2efb80947Sahrens * CDDL HEADER START
3efb80947Sahrens *
4efb80947Sahrens * The contents of this file are subject to the terms of the
5efb80947Sahrens * Common Development and Distribution License (the "License").
6efb80947Sahrens * You may not use this file except in compliance with the License.
7efb80947Sahrens *
8efb80947Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9efb80947Sahrens * or http://www.opensolaris.org/os/licensing.
10efb80947Sahrens * See the License for the specific language governing permissions
11efb80947Sahrens * and limitations under the License.
12efb80947Sahrens *
13efb80947Sahrens * When distributing Covered Code, include this CDDL HEADER in each
14efb80947Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15efb80947Sahrens * If applicable, add the following below this CDDL HEADER, with the
16efb80947Sahrens * fields enclosed by brackets "[]" replaced with your own identifying
17efb80947Sahrens * information: Portions Copyright [yyyy] [name of copyright owner]
18efb80947Sahrens *
19efb80947Sahrens * CDDL HEADER END
20efb80947Sahrens */
21efb80947Sahrens /*
22dc7cd546SMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23ec5cf9d5SAlexander Stetsenko * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24ca0cc391SMatthew Ahrens * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
25a2afb611SJerry Jelinek * Copyright (c) 2014, Joyent, Inc. All rights reserved.
26e77d42eaSMatthew Ahrens * Copyright 2014 HybridCluster. All rights reserved.
27880094b6SAndrew Stormont * Copyright 2016 RackTop Systems.
28c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com]
29ec5cf9d5SAlexander Stetsenko */
30efb80947Sahrens
31efb80947Sahrens #include <sys/dmu.h>
32efb80947Sahrens #include <sys/dmu_impl.h>
33efb80947Sahrens #include <sys/dmu_tx.h>
34efb80947Sahrens #include <sys/dbuf.h>
35efb80947Sahrens #include <sys/dnode.h>
36efb80947Sahrens #include <sys/zfs_context.h>
37efb80947Sahrens #include <sys/dmu_objset.h>
38efb80947Sahrens #include <sys/dmu_traverse.h>
39efb80947Sahrens #include <sys/dsl_dataset.h>
40efb80947Sahrens #include <sys/dsl_dir.h>
4192241e0bSTom Erickson #include <sys/dsl_prop.h>
42efb80947Sahrens #include <sys/dsl_pool.h>
43efb80947Sahrens #include <sys/dsl_synctask.h>
44efb80947Sahrens #include <sys/zfs_ioctl.h>
45efb80947Sahrens #include <sys/zap.h>
46efb80947Sahrens #include <sys/zio_checksum.h>
47dc7cd546SMark Shellenbaum #include <sys/zfs_znode.h>
48cde58dbcSMatthew Ahrens #include <zfs_fletcher.h>
499e69d7d0SLori Alt #include <sys/avl.h>
508e714474SLori Alt #include <sys/ddt.h>
51c99e4bdcSChris Kirby #include <sys/zfs_onexit.h>
523b2aab18SMatthew Ahrens #include <sys/dmu_send.h>
533b2aab18SMatthew Ahrens #include <sys/dsl_destroy.h>
545d7b4d43SMatthew Ahrens #include <sys/blkptr.h>
5578f17100SMatthew Ahrens #include <sys/dsl_bookmark.h>
565d7b4d43SMatthew Ahrens #include <sys/zfeature.h>
57a2cdcdd2SPaul Dagnelie #include <sys/bqueue.h>
58efb80947Sahrens
5919b94df9SMatthew Ahrens /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
6019b94df9SMatthew Ahrens int zfs_send_corrupt_data = B_FALSE;
616ccda740Sloli int zfs_send_queue_length = SPA_MAXBLOCKSIZE;
62880094b6SAndrew Stormont /* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */
63880094b6SAndrew Stormont int zfs_send_set_freerecords_bit = B_TRUE;
64eb633035STom Caputi /* Set this tunable to FALSE is disable sending unmodified spill blocks. */
65eb633035STom Caputi int zfs_send_unmodified_spill_blocks = B_TRUE;
6619b94df9SMatthew Ahrens
67df477c0aSPaul Dagnelie /*
68df477c0aSPaul Dagnelie * Use this to override the recordsize calculation for fast zfs send estimates.
69df477c0aSPaul Dagnelie */
70df477c0aSPaul Dagnelie uint64_t zfs_override_estimate_recordsize = 0;
71df477c0aSPaul Dagnelie
72a2cdcdd2SPaul Dagnelie #define BP_SPAN(datablkszsec, indblkshift, level) \
73a2cdcdd2SPaul Dagnelie (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \
74a2cdcdd2SPaul Dagnelie (level) * (indblkshift - SPA_BLKPTRSHIFT)))
75a2cdcdd2SPaul Dagnelie
76a2cdcdd2SPaul Dagnelie struct send_thread_arg {
77a2cdcdd2SPaul Dagnelie bqueue_t q;
78a2cdcdd2SPaul Dagnelie dsl_dataset_t *ds; /* Dataset to traverse */
79a2cdcdd2SPaul Dagnelie uint64_t fromtxg; /* Traverse from this txg */
80a2cdcdd2SPaul Dagnelie int flags; /* flags to pass to traverse_dataset */
81a2cdcdd2SPaul Dagnelie int error_code;
82a2cdcdd2SPaul Dagnelie boolean_t cancel;
839c3fd121SMatthew Ahrens zbookmark_phys_t resume;
84a2cdcdd2SPaul Dagnelie };
85a2cdcdd2SPaul Dagnelie
86a2cdcdd2SPaul Dagnelie struct send_block_record {
87a2cdcdd2SPaul Dagnelie boolean_t eos_marker; /* Marks the end of the stream */
88a2cdcdd2SPaul Dagnelie blkptr_t bp;
89a2cdcdd2SPaul Dagnelie zbookmark_phys_t zb;
90a2cdcdd2SPaul Dagnelie uint8_t indblkshift;
91a2cdcdd2SPaul Dagnelie uint16_t datablkszsec;
92a2cdcdd2SPaul Dagnelie bqueue_node_t ln;
93a2cdcdd2SPaul Dagnelie };
94a2cdcdd2SPaul Dagnelie
95eb633035STom Caputi static int do_dump(dmu_sendarg_t *dsa, struct send_block_record *data);
96eb633035STom Caputi
97efb80947Sahrens static int
dump_bytes(dmu_sendarg_t * dsp,void * buf,int len)984e3c9f44SBill Pijewski dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
99efb80947Sahrens {
1009c3fd121SMatthew Ahrens dsl_dataset_t *ds = dmu_objset_ds(dsp->dsa_os);
101efb80947Sahrens ssize_t resid; /* have to get resid to get detailed errno */
102c20404ffSEli Rosenthal
103c20404ffSEli Rosenthal /*
104eb633035STom Caputi * The code does not rely on len being a multiple of 8. We keep
105c20404ffSEli Rosenthal * this assertion because of the corresponding assertion in
106c20404ffSEli Rosenthal * receive_read(). Keeping this assertion ensures that we do not
107c20404ffSEli Rosenthal * inadvertently break backwards compatibility (causing the assertion
108eb633035STom Caputi * in receive_read() to trigger on old software). Newer feature flags
109eb633035STom Caputi * (such as raw send) may break this assertion since they were
110eb633035STom Caputi * introduced after the requirement was made obsolete.
111c20404ffSEli Rosenthal */
112c20404ffSEli Rosenthal
113eb633035STom Caputi ASSERT(len % 8 == 0 ||
114eb633035STom Caputi (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) != 0);
115efb80947Sahrens
1164e3c9f44SBill Pijewski dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
117efb80947Sahrens (caddr_t)buf, len,
118efb80947Sahrens 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
1194e3c9f44SBill Pijewski
1204e3c9f44SBill Pijewski mutex_enter(&ds->ds_sendstream_lock);
1214e3c9f44SBill Pijewski *dsp->dsa_off += len;
1224e3c9f44SBill Pijewski mutex_exit(&ds->ds_sendstream_lock);
1234e3c9f44SBill Pijewski
1244e3c9f44SBill Pijewski return (dsp->dsa_err);
125efb80947Sahrens }
126efb80947Sahrens
12798110f08SMatthew Ahrens /*
12898110f08SMatthew Ahrens * For all record types except BEGIN, fill in the checksum (overlaid in
12998110f08SMatthew Ahrens * drr_u.drr_checksum.drr_checksum). The checksum verifies everything
13098110f08SMatthew Ahrens * up to the start of the checksum itself.
13198110f08SMatthew Ahrens */
13298110f08SMatthew Ahrens static int
dump_record(dmu_sendarg_t * dsp,void * payload,int payload_len)13398110f08SMatthew Ahrens dump_record(dmu_sendarg_t *dsp, void *payload, int payload_len)
13498110f08SMatthew Ahrens {
13598110f08SMatthew Ahrens ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
13698110f08SMatthew Ahrens ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t));
137770499e1SDan Kimmel (void) fletcher_4_incremental_native(dsp->dsa_drr,
13898110f08SMatthew Ahrens offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
13998110f08SMatthew Ahrens &dsp->dsa_zc);
14012b90ee2SMatt Krantz if (dsp->dsa_drr->drr_type == DRR_BEGIN) {
14112b90ee2SMatt Krantz dsp->dsa_sent_begin = B_TRUE;
14212b90ee2SMatt Krantz } else {
14398110f08SMatthew Ahrens ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u.
14498110f08SMatthew Ahrens drr_checksum.drr_checksum));
14598110f08SMatthew Ahrens dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc;
14698110f08SMatthew Ahrens }
14712b90ee2SMatt Krantz if (dsp->dsa_drr->drr_type == DRR_END) {
14812b90ee2SMatt Krantz dsp->dsa_sent_end = B_TRUE;
14912b90ee2SMatt Krantz }
150770499e1SDan Kimmel (void) fletcher_4_incremental_native(&dsp->dsa_drr->
15198110f08SMatthew Ahrens drr_u.drr_checksum.drr_checksum,
15298110f08SMatthew Ahrens sizeof (zio_cksum_t), &dsp->dsa_zc);
15398110f08SMatthew Ahrens if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
15498110f08SMatthew Ahrens return (SET_ERROR(EINTR));
15598110f08SMatthew Ahrens if (payload_len != 0) {
156770499e1SDan Kimmel (void) fletcher_4_incremental_native(payload, payload_len,
15798110f08SMatthew Ahrens &dsp->dsa_zc);
15898110f08SMatthew Ahrens if (dump_bytes(dsp, payload, payload_len) != 0)
15998110f08SMatthew Ahrens return (SET_ERROR(EINTR));
16098110f08SMatthew Ahrens }
16198110f08SMatthew Ahrens return (0);
16298110f08SMatthew Ahrens }
16398110f08SMatthew Ahrens
16468ecb2ecSPaul Dagnelie /*
16568ecb2ecSPaul Dagnelie * Fill in the drr_free struct, or perform aggregation if the previous record is
16668ecb2ecSPaul Dagnelie * also a free record, and the two are adjacent.
16768ecb2ecSPaul Dagnelie *
16868ecb2ecSPaul Dagnelie * Note that we send free records even for a full send, because we want to be
16968ecb2ecSPaul Dagnelie * able to receive a full send as a clone, which requires a list of all the free
17068ecb2ecSPaul Dagnelie * and freeobject records that were generated on the source.
17168ecb2ecSPaul Dagnelie */
172efb80947Sahrens static int
dump_free(dmu_sendarg_t * dsp,uint64_t object,uint64_t offset,uint64_t length)1734e3c9f44SBill Pijewski dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
174efb80947Sahrens uint64_t length)
175efb80947Sahrens {
1764e3c9f44SBill Pijewski struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free);
1779e69d7d0SLori Alt
1782f3d8780SMatthew Ahrens /*
1792f3d8780SMatthew Ahrens * When we receive a free record, dbuf_free_range() assumes
1802f3d8780SMatthew Ahrens * that the receiving system doesn't have any dbufs in the range
1812f3d8780SMatthew Ahrens * being freed. This is always true because there is a one-record
1822f3d8780SMatthew Ahrens * constraint: we only send one WRITE record for any given
1839c3fd121SMatthew Ahrens * object,offset. We know that the one-record constraint is
1842f3d8780SMatthew Ahrens * true because we always send data in increasing order by
1852f3d8780SMatthew Ahrens * object,offset.
1862f3d8780SMatthew Ahrens *
1872f3d8780SMatthew Ahrens * If the increasing-order constraint ever changes, we should find
1882f3d8780SMatthew Ahrens * another way to assert that the one-record constraint is still
1892f3d8780SMatthew Ahrens * satisfied.
1902f3d8780SMatthew Ahrens */
1912f3d8780SMatthew Ahrens ASSERT(object > dsp->dsa_last_data_object ||
1922f3d8780SMatthew Ahrens (object == dsp->dsa_last_data_object &&
1932f3d8780SMatthew Ahrens offset > dsp->dsa_last_data_offset));
1942f3d8780SMatthew Ahrens
1959e69d7d0SLori Alt /*
1969e69d7d0SLori Alt * If there is a pending op, but it's not PENDING_FREE, push it out,
1979e69d7d0SLori Alt * since free block aggregation can only be done for blocks of the
1989e69d7d0SLori Alt * same type (i.e., DRR_FREE records can only be aggregated with
1999e69d7d0SLori Alt * other DRR_FREE records. DRR_FREEOBJECTS records can only be
2009e69d7d0SLori Alt * aggregated with other DRR_FREEOBJECTS records.
2019e69d7d0SLori Alt */
2024e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE &&
2034e3c9f44SBill Pijewski dsp->dsa_pending_op != PENDING_FREE) {
20498110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
205be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
2064e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
2079e69d7d0SLori Alt }
2089e69d7d0SLori Alt
2094e3c9f44SBill Pijewski if (dsp->dsa_pending_op == PENDING_FREE) {
2109e69d7d0SLori Alt /*
211eb633035STom Caputi * There should never be a PENDING_FREE if length is
212eb633035STom Caputi * DMU_OBJECT_END (because dump_dnode is the only place where
213eb633035STom Caputi * this function is called with a DMU_OBJECT_END, and only after
214eb633035STom Caputi * flushing any pending record).
2159e69d7d0SLori Alt */
216eb633035STom Caputi ASSERT(length != DMU_OBJECT_END);
2179e69d7d0SLori Alt /*
2189e69d7d0SLori Alt * Check to see whether this free block can be aggregated
2199e69d7d0SLori Alt * with pending one.
2209e69d7d0SLori Alt */
2219e69d7d0SLori Alt if (drrf->drr_object == object && drrf->drr_offset +
2229e69d7d0SLori Alt drrf->drr_length == offset) {
223eb633035STom Caputi if (offset + length < offset)
224eb633035STom Caputi drrf->drr_length = DMU_OBJECT_END;
225eb633035STom Caputi else
226eb633035STom Caputi drrf->drr_length += length;
2279e69d7d0SLori Alt return (0);
2289e69d7d0SLori Alt } else {
2299e69d7d0SLori Alt /* not a continuation. Push out pending record */
23098110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
231be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
2324e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
2339e69d7d0SLori Alt }
2349e69d7d0SLori Alt }
2359e69d7d0SLori Alt /* create a FREE record and make it pending */
2364e3c9f44SBill Pijewski bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
2374e3c9f44SBill Pijewski dsp->dsa_drr->drr_type = DRR_FREE;
2389e69d7d0SLori Alt drrf->drr_object = object;
2399e69d7d0SLori Alt drrf->drr_offset = offset;
240eb633035STom Caputi if (offset + length < offset)
241eb633035STom Caputi drrf->drr_length = DMU_OBJECT_END;
242eb633035STom Caputi else
243eb633035STom Caputi drrf->drr_length = length;
2444e3c9f44SBill Pijewski drrf->drr_toguid = dsp->dsa_toguid;
245eb633035STom Caputi if (length == DMU_OBJECT_END) {
24698110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
247be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
2489e69d7d0SLori Alt } else {
2494e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_FREE;
2509e69d7d0SLori Alt }
251efb80947Sahrens
252efb80947Sahrens return (0);
253efb80947Sahrens }
254efb80947Sahrens
255efb80947Sahrens static int
dump_write(dmu_sendarg_t * dsp,dmu_object_type_t type,uint64_t object,uint64_t offset,int lsize,int psize,const blkptr_t * bp,void * data)256eb633035STom Caputi dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, uint64_t object,
257eb633035STom Caputi uint64_t offset, int lsize, int psize, const blkptr_t *bp, void *data)
258efb80947Sahrens {
2595602294fSDan Kimmel uint64_t payload_size;
260eb633035STom Caputi boolean_t raw = (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW);
2614e3c9f44SBill Pijewski struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write);
2629e69d7d0SLori Alt
2632f3d8780SMatthew Ahrens /*
2642f3d8780SMatthew Ahrens * We send data in increasing object, offset order.
2652f3d8780SMatthew Ahrens * See comment in dump_free() for details.
2662f3d8780SMatthew Ahrens */
2672f3d8780SMatthew Ahrens ASSERT(object > dsp->dsa_last_data_object ||
2682f3d8780SMatthew Ahrens (object == dsp->dsa_last_data_object &&
2692f3d8780SMatthew Ahrens offset > dsp->dsa_last_data_offset));
2702f3d8780SMatthew Ahrens dsp->dsa_last_data_object = object;
2715602294fSDan Kimmel dsp->dsa_last_data_offset = offset + lsize - 1;
2728e714474SLori Alt
2739e69d7d0SLori Alt /*
2749e69d7d0SLori Alt * If there is any kind of pending aggregation (currently either
2759e69d7d0SLori Alt * a grouping of free objects or free blocks), push it out to
2769e69d7d0SLori Alt * the stream, since aggregation can't be done across operations
2779e69d7d0SLori Alt * of different types.
2789e69d7d0SLori Alt */
2794e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE) {
28098110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
281be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
2824e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
2839e69d7d0SLori Alt }
28498110f08SMatthew Ahrens /* write a WRITE record */
2854e3c9f44SBill Pijewski bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
2864e3c9f44SBill Pijewski dsp->dsa_drr->drr_type = DRR_WRITE;
2879e69d7d0SLori Alt drrw->drr_object = object;
2889e69d7d0SLori Alt drrw->drr_type = type;
2899e69d7d0SLori Alt drrw->drr_offset = offset;
2904e3c9f44SBill Pijewski drrw->drr_toguid = dsp->dsa_toguid;
2915602294fSDan Kimmel drrw->drr_logical_size = lsize;
2925602294fSDan Kimmel
293eb633035STom Caputi /* only set the compression fields if the buf is compressed or raw */
294eb633035STom Caputi if (raw || lsize != psize) {
2955602294fSDan Kimmel ASSERT(!BP_IS_EMBEDDED(bp));
2965602294fSDan Kimmel ASSERT3S(psize, >, 0);
2975602294fSDan Kimmel
298eb633035STom Caputi if (raw) {
299eb633035STom Caputi ASSERT(BP_IS_PROTECTED(bp));
300eb633035STom Caputi
301eb633035STom Caputi /*
302eb633035STom Caputi * This is a raw protected block so we need to pass
303eb633035STom Caputi * along everything the receiving side will need to
304eb633035STom Caputi * interpret this block, including the byteswap, salt,
305eb633035STom Caputi * IV, and MAC.
306eb633035STom Caputi */
307eb633035STom Caputi if (BP_SHOULD_BYTESWAP(bp))
308eb633035STom Caputi drrw->drr_flags |= DRR_RAW_BYTESWAP;
309eb633035STom Caputi zio_crypt_decode_params_bp(bp, drrw->drr_salt,
310eb633035STom Caputi drrw->drr_iv);
311eb633035STom Caputi zio_crypt_decode_mac_bp(bp, drrw->drr_mac);
312eb633035STom Caputi } else {
313eb633035STom Caputi /* this is a compressed block */
314eb633035STom Caputi ASSERT(dsp->dsa_featureflags &
315eb633035STom Caputi DMU_BACKUP_FEATURE_COMPRESSED);
316eb633035STom Caputi ASSERT(!BP_SHOULD_BYTESWAP(bp));
317eb633035STom Caputi ASSERT(!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)));
318eb633035STom Caputi ASSERT3U(BP_GET_COMPRESS(bp), !=, ZIO_COMPRESS_OFF);
319eb633035STom Caputi ASSERT3S(lsize, >=, psize);
320eb633035STom Caputi }
321eb633035STom Caputi
322eb633035STom Caputi /* set fields common to compressed and raw sends */
3235602294fSDan Kimmel drrw->drr_compressiontype = BP_GET_COMPRESS(bp);
3245602294fSDan Kimmel drrw->drr_compressed_size = psize;
3255602294fSDan Kimmel payload_size = drrw->drr_compressed_size;
3265602294fSDan Kimmel } else {
3275602294fSDan Kimmel payload_size = drrw->drr_logical_size;
3285602294fSDan Kimmel }
3295602294fSDan Kimmel
330eb633035STom Caputi if (bp == NULL || BP_IS_EMBEDDED(bp) || (BP_IS_PROTECTED(bp) && !raw)) {
3315d7b4d43SMatthew Ahrens /*
332eb633035STom Caputi * There's no pre-computed checksum for partial-block writes,
333eb633035STom Caputi * embedded BP's, or encrypted BP's that are being sent as
334eb633035STom Caputi * plaintext, so (like fletcher4-checkummed blocks) userland
335eb633035STom Caputi * will have to compute a dedup-capable checksum itself.
3365d7b4d43SMatthew Ahrens */
3375d7b4d43SMatthew Ahrens drrw->drr_checksumtype = ZIO_CHECKSUM_OFF;
3385d7b4d43SMatthew Ahrens } else {
3395d7b4d43SMatthew Ahrens drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
34045818ee1SMatthew Ahrens if (zio_checksum_table[drrw->drr_checksumtype].ci_flags &
34145818ee1SMatthew Ahrens ZCHECKSUM_FLAG_DEDUP)
342eb633035STom Caputi drrw->drr_flags |= DRR_CHECKSUM_DEDUP;
3435d7b4d43SMatthew Ahrens DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
3445d7b4d43SMatthew Ahrens DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
3455d7b4d43SMatthew Ahrens DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
346eb633035STom Caputi DDK_SET_CRYPT(&drrw->drr_key, BP_IS_PROTECTED(bp));
3475d7b4d43SMatthew Ahrens drrw->drr_key.ddk_cksum = bp->blk_cksum;
3485d7b4d43SMatthew Ahrens }
349efb80947Sahrens
3505602294fSDan Kimmel if (dump_record(dsp, data, payload_size) != 0)
351be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
352efb80947Sahrens return (0);
353efb80947Sahrens }
354efb80947Sahrens
3555d7b4d43SMatthew Ahrens static int
dump_write_embedded(dmu_sendarg_t * dsp,uint64_t object,uint64_t offset,int blksz,const blkptr_t * bp)3565d7b4d43SMatthew Ahrens dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
3575d7b4d43SMatthew Ahrens int blksz, const blkptr_t *bp)
3585d7b4d43SMatthew Ahrens {
3595d7b4d43SMatthew Ahrens char buf[BPE_PAYLOAD_SIZE];
3605d7b4d43SMatthew Ahrens struct drr_write_embedded *drrw =
3615d7b4d43SMatthew Ahrens &(dsp->dsa_drr->drr_u.drr_write_embedded);
3625d7b4d43SMatthew Ahrens
3635d7b4d43SMatthew Ahrens if (dsp->dsa_pending_op != PENDING_NONE) {
36498110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
3655d7b4d43SMatthew Ahrens return (EINTR);
3665d7b4d43SMatthew Ahrens dsp->dsa_pending_op = PENDING_NONE;
3675d7b4d43SMatthew Ahrens }
3685d7b4d43SMatthew Ahrens
3695d7b4d43SMatthew Ahrens ASSERT(BP_IS_EMBEDDED(bp));
3705d7b4d43SMatthew Ahrens
3715d7b4d43SMatthew Ahrens bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
3725d7b4d43SMatthew Ahrens dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED;
3735d7b4d43SMatthew Ahrens drrw->drr_object = object;
3745d7b4d43SMatthew Ahrens drrw->drr_offset = offset;
3755d7b4d43SMatthew Ahrens drrw->drr_length = blksz;
3765d7b4d43SMatthew Ahrens drrw->drr_toguid = dsp->dsa_toguid;
3775d7b4d43SMatthew Ahrens drrw->drr_compression = BP_GET_COMPRESS(bp);
3785d7b4d43SMatthew Ahrens drrw->drr_etype = BPE_GET_ETYPE(bp);
3795d7b4d43SMatthew Ahrens drrw->drr_lsize = BPE_GET_LSIZE(bp);
3805d7b4d43SMatthew Ahrens drrw->drr_psize = BPE_GET_PSIZE(bp);
3815d7b4d43SMatthew Ahrens
3825d7b4d43SMatthew Ahrens decode_embedded_bp_compressed(bp, buf);
3835d7b4d43SMatthew Ahrens
38498110f08SMatthew Ahrens if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0)
3855d7b4d43SMatthew Ahrens return (EINTR);
3865d7b4d43SMatthew Ahrens return (0);
3875d7b4d43SMatthew Ahrens }
3885d7b4d43SMatthew Ahrens
3890a586ceaSMark Shellenbaum static int
dump_spill(dmu_sendarg_t * dsp,const blkptr_t * bp,uint64_t object,void * data)390eb633035STom Caputi dump_spill(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object, void *data)
3910a586ceaSMark Shellenbaum {
3924e3c9f44SBill Pijewski struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
393eb633035STom Caputi uint64_t blksz = BP_GET_LSIZE(bp);
394eb633035STom Caputi uint64_t payload_size = blksz;
3950a586ceaSMark Shellenbaum
3964e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE) {
39798110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
398be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
3994e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
4000a586ceaSMark Shellenbaum }
4010a586ceaSMark Shellenbaum
4020a586ceaSMark Shellenbaum /* write a SPILL record */
4034e3c9f44SBill Pijewski bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
4044e3c9f44SBill Pijewski dsp->dsa_drr->drr_type = DRR_SPILL;
4050a586ceaSMark Shellenbaum drrs->drr_object = object;
4060a586ceaSMark Shellenbaum drrs->drr_length = blksz;
4074e3c9f44SBill Pijewski drrs->drr_toguid = dsp->dsa_toguid;
4080a586ceaSMark Shellenbaum
409eb633035STom Caputi /* See comment in dump_dnode() for full details */
410eb633035STom Caputi if (zfs_send_unmodified_spill_blocks &&
411eb633035STom Caputi (bp->blk_birth <= dsp->dsa_fromtxg)) {
412eb633035STom Caputi drrs->drr_flags |= DRR_SPILL_UNMODIFIED;
413eb633035STom Caputi }
414eb633035STom Caputi
415eb633035STom Caputi /* handle raw send fields */
416eb633035STom Caputi if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
417eb633035STom Caputi ASSERT(BP_IS_PROTECTED(bp));
418eb633035STom Caputi
419eb633035STom Caputi if (BP_SHOULD_BYTESWAP(bp))
420eb633035STom Caputi drrs->drr_flags |= DRR_RAW_BYTESWAP;
421eb633035STom Caputi drrs->drr_compressiontype = BP_GET_COMPRESS(bp);
422eb633035STom Caputi drrs->drr_compressed_size = BP_GET_PSIZE(bp);
423eb633035STom Caputi zio_crypt_decode_params_bp(bp, drrs->drr_salt, drrs->drr_iv);
424eb633035STom Caputi zio_crypt_decode_mac_bp(bp, drrs->drr_mac);
425eb633035STom Caputi payload_size = drrs->drr_compressed_size;
426eb633035STom Caputi }
427eb633035STom Caputi
428eb633035STom Caputi if (dump_record(dsp, data, payload_size) != 0)
429be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
4300a586ceaSMark Shellenbaum return (0);
4310a586ceaSMark Shellenbaum }
4320a586ceaSMark Shellenbaum
433efb80947Sahrens static int
dump_freeobjects(dmu_sendarg_t * dsp,uint64_t firstobj,uint64_t numobjs)4344e3c9f44SBill Pijewski dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
435efb80947Sahrens {
4364e3c9f44SBill Pijewski struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects);
4379e69d7d0SLori Alt
4389e69d7d0SLori Alt /*
4399e69d7d0SLori Alt * If there is a pending op, but it's not PENDING_FREEOBJECTS,
4409e69d7d0SLori Alt * push it out, since free block aggregation can only be done for
4419e69d7d0SLori Alt * blocks of the same type (i.e., DRR_FREE records can only be
4429e69d7d0SLori Alt * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
4439e69d7d0SLori Alt * can only be aggregated with other DRR_FREEOBJECTS records.
4449e69d7d0SLori Alt */
4454e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE &&
4464e3c9f44SBill Pijewski dsp->dsa_pending_op != PENDING_FREEOBJECTS) {
44798110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
448be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
4494e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
4509e69d7d0SLori Alt }
4514e3c9f44SBill Pijewski if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) {
4529e69d7d0SLori Alt /*
4539e69d7d0SLori Alt * See whether this free object array can be aggregated
4549e69d7d0SLori Alt * with pending one
4559e69d7d0SLori Alt */
4569e69d7d0SLori Alt if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
4579e69d7d0SLori Alt drrfo->drr_numobjs += numobjs;
4589e69d7d0SLori Alt return (0);
4599e69d7d0SLori Alt } else {
4609e69d7d0SLori Alt /* can't be aggregated. Push out pending record */
46198110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
462be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
4634e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
4649e69d7d0SLori Alt }
4659e69d7d0SLori Alt }
4669e69d7d0SLori Alt
467efb80947Sahrens /* write a FREEOBJECTS record */
4684e3c9f44SBill Pijewski bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
4694e3c9f44SBill Pijewski dsp->dsa_drr->drr_type = DRR_FREEOBJECTS;
4709e69d7d0SLori Alt drrfo->drr_firstobj = firstobj;
4719e69d7d0SLori Alt drrfo->drr_numobjs = numobjs;
4724e3c9f44SBill Pijewski drrfo->drr_toguid = dsp->dsa_toguid;
4739e69d7d0SLori Alt
4744e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_FREEOBJECTS;
475efb80947Sahrens
476efb80947Sahrens return (0);
477efb80947Sahrens }
478efb80947Sahrens
479efb80947Sahrens static int
dump_dnode(dmu_sendarg_t * dsp,const blkptr_t * bp,uint64_t object,dnode_phys_t * dnp)480eb633035STom Caputi dump_dnode(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object,
481eb633035STom Caputi dnode_phys_t *dnp)
482efb80947Sahrens {
4834e3c9f44SBill Pijewski struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
484eb633035STom Caputi int bonuslen;
4859e69d7d0SLori Alt
4869c3fd121SMatthew Ahrens if (object < dsp->dsa_resume_object) {
4879c3fd121SMatthew Ahrens /*
4889c3fd121SMatthew Ahrens * Note: when resuming, we will visit all the dnodes in
4899c3fd121SMatthew Ahrens * the block of dnodes that we are resuming from. In
4909c3fd121SMatthew Ahrens * this case it's unnecessary to send the dnodes prior to
4919c3fd121SMatthew Ahrens * the one we are resuming from. We should be at most one
4929c3fd121SMatthew Ahrens * block's worth of dnodes behind the resume point.
4939c3fd121SMatthew Ahrens */
4949c3fd121SMatthew Ahrens ASSERT3U(dsp->dsa_resume_object - object, <,
4959c3fd121SMatthew Ahrens 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT));
4969c3fd121SMatthew Ahrens return (0);
4979c3fd121SMatthew Ahrens }
4989c3fd121SMatthew Ahrens
499efb80947Sahrens if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
5004e3c9f44SBill Pijewski return (dump_freeobjects(dsp, object, 1));
501efb80947Sahrens
5024e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE) {
50398110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
504be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
5054e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
5069e69d7d0SLori Alt }
5079e69d7d0SLori Alt
508efb80947Sahrens /* write an OBJECT record */
5094e3c9f44SBill Pijewski bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
5104e3c9f44SBill Pijewski dsp->dsa_drr->drr_type = DRR_OBJECT;
5119e69d7d0SLori Alt drro->drr_object = object;
5129e69d7d0SLori Alt drro->drr_type = dnp->dn_type;
5139e69d7d0SLori Alt drro->drr_bonustype = dnp->dn_bonustype;
5149e69d7d0SLori Alt drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
5159e69d7d0SLori Alt drro->drr_bonuslen = dnp->dn_bonuslen;
51654811da5SToomas Soome drro->drr_dn_slots = dnp->dn_extra_slots + 1;
5179e69d7d0SLori Alt drro->drr_checksumtype = dnp->dn_checksum;
5189e69d7d0SLori Alt drro->drr_compress = dnp->dn_compress;
5194e3c9f44SBill Pijewski drro->drr_toguid = dsp->dsa_toguid;
5209e69d7d0SLori Alt
521b5152584SMatthew Ahrens if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
522b5152584SMatthew Ahrens drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE)
523b5152584SMatthew Ahrens drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE;
524b5152584SMatthew Ahrens
525eb633035STom Caputi bonuslen = P2ROUNDUP(dnp->dn_bonuslen, 8);
526eb633035STom Caputi
527eb633035STom Caputi if ((dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW)) {
528eb633035STom Caputi ASSERT(BP_IS_ENCRYPTED(bp));
529eb633035STom Caputi
530eb633035STom Caputi if (BP_SHOULD_BYTESWAP(bp))
531eb633035STom Caputi drro->drr_flags |= DRR_RAW_BYTESWAP;
532eb633035STom Caputi
533eb633035STom Caputi /* needed for reconstructing dnp on recv side */
534eb633035STom Caputi drro->drr_maxblkid = dnp->dn_maxblkid;
535eb633035STom Caputi drro->drr_indblkshift = dnp->dn_indblkshift;
536eb633035STom Caputi drro->drr_nlevels = dnp->dn_nlevels;
537eb633035STom Caputi drro->drr_nblkptr = dnp->dn_nblkptr;
538eb633035STom Caputi
539eb633035STom Caputi /*
540eb633035STom Caputi * Since we encrypt the entire bonus area, the (raw) part
541eb633035STom Caputi * beyond the bonuslen is actually nonzero, so we need
542eb633035STom Caputi * to send it.
543eb633035STom Caputi */
544eb633035STom Caputi if (bonuslen != 0) {
545eb633035STom Caputi drro->drr_raw_bonuslen = DN_MAX_BONUS_LEN(dnp);
546eb633035STom Caputi bonuslen = drro->drr_raw_bonuslen;
547eb633035STom Caputi }
54898110f08SMatthew Ahrens }
549efb80947Sahrens
550eb633035STom Caputi /*
551eb633035STom Caputi * DRR_OBJECT_SPILL is set for every dnode which references a
552eb633035STom Caputi * spill block. This allows the receiving pool to definitively
553eb633035STom Caputi * determine when a spill block should be kept or freed.
554eb633035STom Caputi */
555eb633035STom Caputi if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)
556eb633035STom Caputi drro->drr_flags |= DRR_OBJECT_SPILL;
557eb633035STom Caputi
558eb633035STom Caputi if (dump_record(dsp, DN_BONUS(dnp), bonuslen) != 0)
559eb633035STom Caputi return (SET_ERROR(EINTR));
560eb633035STom Caputi
5612f3d8780SMatthew Ahrens /* Free anything past the end of the file. */
5624e3c9f44SBill Pijewski if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
563eb633035STom Caputi (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), DMU_OBJECT_END) != 0)
564be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
565eb633035STom Caputi
566eb633035STom Caputi /*
567eb633035STom Caputi * Send DRR_SPILL records for unmodified spill blocks. This is useful
568eb633035STom Caputi * because changing certain attributes of the object (e.g. blocksize)
569eb633035STom Caputi * can cause old versions of ZFS to incorrectly remove a spill block.
570eb633035STom Caputi * Including these records in the stream forces an up to date version
571eb633035STom Caputi * to always be written ensuring they're never lost. Current versions
572eb633035STom Caputi * of the code which understand the DRR_FLAG_SPILL_BLOCK feature can
573eb633035STom Caputi * ignore these unmodified spill blocks.
574eb633035STom Caputi */
575eb633035STom Caputi if (zfs_send_unmodified_spill_blocks &&
576eb633035STom Caputi (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) &&
577eb633035STom Caputi (DN_SPILL_BLKPTR(dnp)->blk_birth <= dsp->dsa_fromtxg)) {
578eb633035STom Caputi struct send_block_record record;
579eb633035STom Caputi
580eb633035STom Caputi bzero(&record, sizeof (struct send_block_record));
581eb633035STom Caputi record.eos_marker = B_FALSE;
582eb633035STom Caputi record.bp = *DN_SPILL_BLKPTR(dnp);
583eb633035STom Caputi SET_BOOKMARK(&(record.zb), dmu_objset_id(dsp->dsa_os),
584eb633035STom Caputi object, 0, DMU_SPILL_BLKID);
585eb633035STom Caputi
586eb633035STom Caputi if (do_dump(dsp, &record) != 0)
587eb633035STom Caputi return (SET_ERROR(EINTR));
588eb633035STom Caputi }
589eb633035STom Caputi
5903b2aab18SMatthew Ahrens if (dsp->dsa_err != 0)
591be6fd75aSMatthew Ahrens return (SET_ERROR(EINTR));
592efb80947Sahrens return (0);
593efb80947Sahrens }
594efb80947Sahrens
595eb633035STom Caputi static int
dump_object_range(dmu_sendarg_t * dsp,const blkptr_t * bp,uint64_t firstobj,uint64_t numslots)596eb633035STom Caputi dump_object_range(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t firstobj,
597eb633035STom Caputi uint64_t numslots)
598eb633035STom Caputi {
599eb633035STom Caputi struct drr_object_range *drror =
600eb633035STom Caputi &(dsp->dsa_drr->drr_u.drr_object_range);
601eb633035STom Caputi
602eb633035STom Caputi /* we only use this record type for raw sends */
603eb633035STom Caputi ASSERT(BP_IS_PROTECTED(bp));
604eb633035STom Caputi ASSERT(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW);
605eb633035STom Caputi ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
606eb633035STom Caputi ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_DNODE);
607eb633035STom Caputi ASSERT0(BP_GET_LEVEL(bp));
608eb633035STom Caputi
609eb633035STom Caputi if (dsp->dsa_pending_op != PENDING_NONE) {
610eb633035STom Caputi if (dump_record(dsp, NULL, 0) != 0)
611eb633035STom Caputi return (SET_ERROR(EINTR));
612eb633035STom Caputi dsp->dsa_pending_op = PENDING_NONE;
613eb633035STom Caputi }
614eb633035STom Caputi
615eb633035STom Caputi bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
616eb633035STom Caputi dsp->dsa_drr->drr_type = DRR_OBJECT_RANGE;
617eb633035STom Caputi drror->drr_firstobj = firstobj;
618eb633035STom Caputi drror->drr_numslots = numslots;
619eb633035STom Caputi drror->drr_toguid = dsp->dsa_toguid;
620eb633035STom Caputi if (BP_SHOULD_BYTESWAP(bp))
621eb633035STom Caputi drror->drr_flags |= DRR_RAW_BYTESWAP;
622eb633035STom Caputi zio_crypt_decode_params_bp(bp, drror->drr_salt, drror->drr_iv);
623eb633035STom Caputi zio_crypt_decode_mac_bp(bp, drror->drr_mac);
624eb633035STom Caputi
625eb633035STom Caputi if (dump_record(dsp, NULL, 0) != 0)
626eb633035STom Caputi return (SET_ERROR(EINTR));
627eb633035STom Caputi return (0);
628eb633035STom Caputi }
629eb633035STom Caputi
6305d7b4d43SMatthew Ahrens static boolean_t
backup_do_embed(dmu_sendarg_t * dsp,const blkptr_t * bp)6315d7b4d43SMatthew Ahrens backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp)
6325d7b4d43SMatthew Ahrens {
6335d7b4d43SMatthew Ahrens if (!BP_IS_EMBEDDED(bp))
6345d7b4d43SMatthew Ahrens return (B_FALSE);
6355d7b4d43SMatthew Ahrens
6365d7b4d43SMatthew Ahrens /*
6375d7b4d43SMatthew Ahrens * Compression function must be legacy, or explicitly enabled.
6385d7b4d43SMatthew Ahrens */
6395d7b4d43SMatthew Ahrens if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS &&
6405602294fSDan Kimmel !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LZ4)))
6415d7b4d43SMatthew Ahrens return (B_FALSE);
6425d7b4d43SMatthew Ahrens
6435d7b4d43SMatthew Ahrens /*
6445d7b4d43SMatthew Ahrens * Embed type must be explicitly enabled.
6455d7b4d43SMatthew Ahrens */
6465d7b4d43SMatthew Ahrens switch (BPE_GET_ETYPE(bp)) {
6475d7b4d43SMatthew Ahrens case BP_EMBEDDED_TYPE_DATA:
6485d7b4d43SMatthew Ahrens if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)
6495d7b4d43SMatthew Ahrens return (B_TRUE);
6505d7b4d43SMatthew Ahrens break;
6515d7b4d43SMatthew Ahrens default:
6525d7b4d43SMatthew Ahrens return (B_FALSE);
6535d7b4d43SMatthew Ahrens }
6545d7b4d43SMatthew Ahrens return (B_FALSE);
6555d7b4d43SMatthew Ahrens }
6565d7b4d43SMatthew Ahrens
657a2cdcdd2SPaul Dagnelie /*
658a2cdcdd2SPaul Dagnelie * This is the callback function to traverse_dataset that acts as the worker
659a2cdcdd2SPaul Dagnelie * thread for dmu_send_impl.
660a2cdcdd2SPaul Dagnelie */
661a2cdcdd2SPaul Dagnelie /*ARGSUSED*/
662a2cdcdd2SPaul Dagnelie static int
send_cb(spa_t * spa,zilog_t * zilog,const blkptr_t * bp,const zbookmark_phys_t * zb,const struct dnode_phys * dnp,void * arg)663a2cdcdd2SPaul Dagnelie send_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
664a2cdcdd2SPaul Dagnelie const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg)
665a2cdcdd2SPaul Dagnelie {
666a2cdcdd2SPaul Dagnelie struct send_thread_arg *sta = arg;
667a2cdcdd2SPaul Dagnelie struct send_block_record *record;
668a2cdcdd2SPaul Dagnelie uint64_t record_size;
669a2cdcdd2SPaul Dagnelie int err = 0;
670efb80947Sahrens
6719c3fd121SMatthew Ahrens ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT ||
6729c3fd121SMatthew Ahrens zb->zb_object >= sta->resume.zb_object);
673eb633035STom Caputi ASSERT3P(sta->ds, !=, NULL);
6749c3fd121SMatthew Ahrens
675a2cdcdd2SPaul Dagnelie if (sta->cancel)
676a2cdcdd2SPaul Dagnelie return (SET_ERROR(EINTR));
677a2cdcdd2SPaul Dagnelie
678a2cdcdd2SPaul Dagnelie if (bp == NULL) {
679a2cdcdd2SPaul Dagnelie ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL);
680a2cdcdd2SPaul Dagnelie return (0);
681a2cdcdd2SPaul Dagnelie } else if (zb->zb_level < 0) {
682a2cdcdd2SPaul Dagnelie return (0);
683a2cdcdd2SPaul Dagnelie }
684a2cdcdd2SPaul Dagnelie
685a2cdcdd2SPaul Dagnelie record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP);
686a2cdcdd2SPaul Dagnelie record->eos_marker = B_FALSE;
687a2cdcdd2SPaul Dagnelie record->bp = *bp;
688a2cdcdd2SPaul Dagnelie record->zb = *zb;
689a2cdcdd2SPaul Dagnelie record->indblkshift = dnp->dn_indblkshift;
690a2cdcdd2SPaul Dagnelie record->datablkszsec = dnp->dn_datablkszsec;
691a2cdcdd2SPaul Dagnelie record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
692a2cdcdd2SPaul Dagnelie bqueue_enqueue(&sta->q, record, record_size);
693a2cdcdd2SPaul Dagnelie
694a2cdcdd2SPaul Dagnelie return (err);
695a2cdcdd2SPaul Dagnelie }
696a2cdcdd2SPaul Dagnelie
697a2cdcdd2SPaul Dagnelie /*
698a2cdcdd2SPaul Dagnelie * This function kicks off the traverse_dataset. It also handles setting the
699a2cdcdd2SPaul Dagnelie * error code of the thread in case something goes wrong, and pushes the End of
700a2cdcdd2SPaul Dagnelie * Stream record when the traverse_dataset call has finished. If there is no
701a2cdcdd2SPaul Dagnelie * dataset to traverse, the thread immediately pushes End of Stream marker.
702a2cdcdd2SPaul Dagnelie */
703a2cdcdd2SPaul Dagnelie static void
send_traverse_thread(void * arg)704a2cdcdd2SPaul Dagnelie send_traverse_thread(void *arg)
705a2cdcdd2SPaul Dagnelie {
706a2cdcdd2SPaul Dagnelie struct send_thread_arg *st_arg = arg;
707a2cdcdd2SPaul Dagnelie int err;
708a2cdcdd2SPaul Dagnelie struct send_block_record *data;
709a2cdcdd2SPaul Dagnelie
710a2cdcdd2SPaul Dagnelie if (st_arg->ds != NULL) {
7119c3fd121SMatthew Ahrens err = traverse_dataset_resume(st_arg->ds,
7129c3fd121SMatthew Ahrens st_arg->fromtxg, &st_arg->resume,
7139c3fd121SMatthew Ahrens st_arg->flags, send_cb, st_arg);
7149c3fd121SMatthew Ahrens
715a2cdcdd2SPaul Dagnelie if (err != EINTR)
716a2cdcdd2SPaul Dagnelie st_arg->error_code = err;
717a2cdcdd2SPaul Dagnelie }
718a2cdcdd2SPaul Dagnelie data = kmem_zalloc(sizeof (*data), KM_SLEEP);
719a2cdcdd2SPaul Dagnelie data->eos_marker = B_TRUE;
720a2cdcdd2SPaul Dagnelie bqueue_enqueue(&st_arg->q, data, 1);
721f2c1e9bcSJorgen Lundman thread_exit();
722a2cdcdd2SPaul Dagnelie }
723a2cdcdd2SPaul Dagnelie
724a2cdcdd2SPaul Dagnelie /*
725a2cdcdd2SPaul Dagnelie * This function actually handles figuring out what kind of record needs to be
726a2cdcdd2SPaul Dagnelie * dumped, reading the data (which has hopefully been prefetched), and calling
727a2cdcdd2SPaul Dagnelie * the appropriate helper function.
728a2cdcdd2SPaul Dagnelie */
729efb80947Sahrens static int
do_dump(dmu_sendarg_t * dsa,struct send_block_record * data)730a2cdcdd2SPaul Dagnelie do_dump(dmu_sendarg_t *dsa, struct send_block_record *data)
731efb80947Sahrens {
732a2cdcdd2SPaul Dagnelie dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os);
733a2cdcdd2SPaul Dagnelie const blkptr_t *bp = &data->bp;
734a2cdcdd2SPaul Dagnelie const zbookmark_phys_t *zb = &data->zb;
735a2cdcdd2SPaul Dagnelie uint8_t indblkshift = data->indblkshift;
736a2cdcdd2SPaul Dagnelie uint16_t dblkszsec = data->datablkszsec;
737a2cdcdd2SPaul Dagnelie spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
738efb80947Sahrens dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
739efb80947Sahrens int err = 0;
740efb80947Sahrens
741a2cdcdd2SPaul Dagnelie ASSERT3U(zb->zb_level, >=, 0);
742efb80947Sahrens
7439c3fd121SMatthew Ahrens ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT ||
7449c3fd121SMatthew Ahrens zb->zb_object >= dsa->dsa_resume_object);
7459c3fd121SMatthew Ahrens
746eb633035STom Caputi /*
747eb633035STom Caputi * All bps of an encrypted os should have the encryption bit set.
748eb633035STom Caputi * If this is not true it indicates tampering and we report an error.
749eb633035STom Caputi */
750eb633035STom Caputi if (dsa->dsa_os->os_encrypted &&
751eb633035STom Caputi !BP_IS_HOLE(bp) && !BP_USES_CRYPT(bp)) {
752eb633035STom Caputi spa_log_error(spa, zb);
753eb633035STom Caputi zfs_panic_recover("unencrypted block in encrypted "
754eb633035STom Caputi "object set %llu", ds->ds_object);
755eb633035STom Caputi return (SET_ERROR(EIO));
756eb633035STom Caputi }
757eb633035STom Caputi
758b24ab676SJeff Bonwick if (zb->zb_object != DMU_META_DNODE_OBJECT &&
759b24ab676SJeff Bonwick DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
76014843421SMatthew Ahrens return (0);
76143466aaeSMax Grossman } else if (BP_IS_HOLE(bp) &&
76243466aaeSMax Grossman zb->zb_object == DMU_META_DNODE_OBJECT) {
763a2cdcdd2SPaul Dagnelie uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level);
76488b7b0f2SMatthew Ahrens uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
765a2cdcdd2SPaul Dagnelie err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT);
76643466aaeSMax Grossman } else if (BP_IS_HOLE(bp)) {
767a2cdcdd2SPaul Dagnelie uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level);
768a2cdcdd2SPaul Dagnelie uint64_t offset = zb->zb_blkid * span;
769eb633035STom Caputi /* Don't dump free records for offsets > DMU_OBJECT_END */
770eb633035STom Caputi if (zb->zb_blkid == 0 || span <= DMU_OBJECT_END / zb->zb_blkid)
771eb633035STom Caputi err = dump_free(dsa, zb->zb_object, offset, span);
77288b7b0f2SMatthew Ahrens } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
77388b7b0f2SMatthew Ahrens return (0);
77488b7b0f2SMatthew Ahrens } else if (type == DMU_OT_DNODE) {
77554811da5SToomas Soome int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
7767adb730bSGeorge Wilson arc_flags_t aflags = ARC_FLAG_WAIT;
77788b7b0f2SMatthew Ahrens arc_buf_t *abuf;
778eb633035STom Caputi enum zio_flag zioflags = ZIO_FLAG_CANFAIL;
779eb633035STom Caputi
780eb633035STom Caputi if (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
781eb633035STom Caputi ASSERT(BP_IS_ENCRYPTED(bp));
782eb633035STom Caputi ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
783eb633035STom Caputi zioflags |= ZIO_FLAG_RAW;
784eb633035STom Caputi }
785efb80947Sahrens
786a2cdcdd2SPaul Dagnelie ASSERT0(zb->zb_level);
787a2cdcdd2SPaul Dagnelie
7881b912ec7SGeorge Wilson if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
789eb633035STom Caputi ZIO_PRIORITY_ASYNC_READ, zioflags, &aflags, zb) != 0)
790be6fd75aSMatthew Ahrens return (SET_ERROR(EIO));
79188b7b0f2SMatthew Ahrens
792a2cdcdd2SPaul Dagnelie dnode_phys_t *blk = abuf->b_data;
79354811da5SToomas Soome uint64_t dnobj = zb->zb_blkid * epb;
794eb633035STom Caputi
795eb633035STom Caputi /*
796eb633035STom Caputi * Raw sends require sending encryption parameters for the
797eb633035STom Caputi * block of dnodes. Regular sends do not need to send this
798eb633035STom Caputi * info.
799eb633035STom Caputi */
800eb633035STom Caputi if (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
801eb633035STom Caputi ASSERT(arc_is_encrypted(abuf));
802eb633035STom Caputi err = dump_object_range(dsa, bp, dnobj, epb);
803eb633035STom Caputi }
804eb633035STom Caputi
805eb633035STom Caputi if (err == 0) {
806eb633035STom Caputi for (int i = 0; i < epb;
807eb633035STom Caputi i += blk[i].dn_extra_slots + 1) {
808eb633035STom Caputi err = dump_dnode(dsa, bp, dnobj + i, blk + i);
809eb633035STom Caputi if (err != 0)
810eb633035STom Caputi break;
811eb633035STom Caputi }
812efb80947Sahrens }
813dcbf3bd6SGeorge Wilson arc_buf_destroy(abuf, &abuf);
8140a586ceaSMark Shellenbaum } else if (type == DMU_OT_SA) {
8157adb730bSGeorge Wilson arc_flags_t aflags = ARC_FLAG_WAIT;
8160a586ceaSMark Shellenbaum arc_buf_t *abuf;
817eb633035STom Caputi enum zio_flag zioflags = ZIO_FLAG_CANFAIL;
818eb633035STom Caputi
819eb633035STom Caputi if (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
820eb633035STom Caputi ASSERT(BP_IS_PROTECTED(bp));
821eb633035STom Caputi zioflags |= ZIO_FLAG_RAW;
822eb633035STom Caputi }
8230a586ceaSMark Shellenbaum
8241b912ec7SGeorge Wilson if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
825eb633035STom Caputi ZIO_PRIORITY_ASYNC_READ, zioflags, &aflags, zb) != 0)
826be6fd75aSMatthew Ahrens return (SET_ERROR(EIO));
8270a586ceaSMark Shellenbaum
828eb633035STom Caputi err = dump_spill(dsa, bp, zb->zb_object, abuf->b_data);
829dcbf3bd6SGeorge Wilson arc_buf_destroy(abuf, &abuf);
830a2cdcdd2SPaul Dagnelie } else if (backup_do_embed(dsa, bp)) {
8315d7b4d43SMatthew Ahrens /* it's an embedded level-0 block of a regular object */
832a2cdcdd2SPaul Dagnelie int blksz = dblkszsec << SPA_MINBLOCKSHIFT;
833a2cdcdd2SPaul Dagnelie ASSERT0(zb->zb_level);
834a2cdcdd2SPaul Dagnelie err = dump_write_embedded(dsa, zb->zb_object,
8355d7b4d43SMatthew Ahrens zb->zb_blkid * blksz, blksz, bp);
836a2cdcdd2SPaul Dagnelie } else {
837a2cdcdd2SPaul Dagnelie /* it's a level-0 block of a regular object */
8387adb730bSGeorge Wilson arc_flags_t aflags = ARC_FLAG_WAIT;
83988b7b0f2SMatthew Ahrens arc_buf_t *abuf;
840a2cdcdd2SPaul Dagnelie int blksz = dblkszsec << SPA_MINBLOCKSHIFT;
841b5152584SMatthew Ahrens uint64_t offset;
84288b7b0f2SMatthew Ahrens
8435602294fSDan Kimmel /*
8445602294fSDan Kimmel * If we have large blocks stored on disk but the send flags
8455602294fSDan Kimmel * don't allow us to send large blocks, we split the data from
8465602294fSDan Kimmel * the arc buf into chunks.
8475602294fSDan Kimmel */
8485602294fSDan Kimmel boolean_t split_large_blocks = blksz > SPA_OLD_MAXBLOCKSIZE &&
8495602294fSDan Kimmel !(dsa->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS);
850eb633035STom Caputi
851eb633035STom Caputi /*
852eb633035STom Caputi * Raw sends require that we always get raw data as it exists
853eb633035STom Caputi * on disk, so we assert that we are not splitting blocks here.
854eb633035STom Caputi */
855eb633035STom Caputi boolean_t request_raw =
856eb633035STom Caputi (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) != 0;
857eb633035STom Caputi
8585602294fSDan Kimmel /*
8595602294fSDan Kimmel * We should only request compressed data from the ARC if all
8605602294fSDan Kimmel * the following are true:
8615602294fSDan Kimmel * - stream compression was requested
8625602294fSDan Kimmel * - we aren't splitting large blocks into smaller chunks
8635602294fSDan Kimmel * - the data won't need to be byteswapped before sending
8645602294fSDan Kimmel * - this isn't an embedded block
8655602294fSDan Kimmel * - this isn't metadata (if receiving on a different endian
8665602294fSDan Kimmel * system it can be byteswapped more easily)
8675602294fSDan Kimmel */
8685602294fSDan Kimmel boolean_t request_compressed =
8695602294fSDan Kimmel (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_COMPRESSED) &&
8705602294fSDan Kimmel !split_large_blocks && !BP_SHOULD_BYTESWAP(bp) &&
8715602294fSDan Kimmel !BP_IS_EMBEDDED(bp) && !DMU_OT_IS_METADATA(BP_GET_TYPE(bp));
8725602294fSDan Kimmel
873eb633035STom Caputi IMPLY(request_raw, !split_large_blocks);
874eb633035STom Caputi IMPLY(request_raw, BP_IS_PROTECTED(bp));
8755602294fSDan Kimmel ASSERT0(zb->zb_level);
8765602294fSDan Kimmel ASSERT(zb->zb_object > dsa->dsa_resume_object ||
8775602294fSDan Kimmel (zb->zb_object == dsa->dsa_resume_object &&
8785602294fSDan Kimmel zb->zb_blkid * blksz >= dsa->dsa_resume_offset));
8795602294fSDan Kimmel
88078f17100SMatthew Ahrens ASSERT0(zb->zb_level);
8819c3fd121SMatthew Ahrens ASSERT(zb->zb_object > dsa->dsa_resume_object ||
8829c3fd121SMatthew Ahrens (zb->zb_object == dsa->dsa_resume_object &&
8839c3fd121SMatthew Ahrens zb->zb_blkid * blksz >= dsa->dsa_resume_offset));
8849c3fd121SMatthew Ahrens
8855602294fSDan Kimmel ASSERT3U(blksz, ==, BP_GET_LSIZE(bp));
8865602294fSDan Kimmel
8875602294fSDan Kimmel enum zio_flag zioflags = ZIO_FLAG_CANFAIL;
888eb633035STom Caputi if (request_raw)
8895602294fSDan Kimmel zioflags |= ZIO_FLAG_RAW;
890eb633035STom Caputi else if (request_compressed)
891eb633035STom Caputi zioflags |= ZIO_FLAG_RAW_COMPRESS;
892eb633035STom Caputi
8931b912ec7SGeorge Wilson if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
8945602294fSDan Kimmel ZIO_PRIORITY_ASYNC_READ, zioflags, &aflags, zb) != 0) {
89519b94df9SMatthew Ahrens if (zfs_send_corrupt_data) {
89619b94df9SMatthew Ahrens /* Send a block filled with 0x"zfs badd bloc" */
8975602294fSDan Kimmel abuf = arc_alloc_buf(spa, &abuf, ARC_BUFC_DATA,
8985602294fSDan Kimmel blksz);
89919b94df9SMatthew Ahrens uint64_t *ptr;
90019b94df9SMatthew Ahrens for (ptr = abuf->b_data;
90119b94df9SMatthew Ahrens (char *)ptr < (char *)abuf->b_data + blksz;
90219b94df9SMatthew Ahrens ptr++)
9038c76e076SBrian Behlendorf *ptr = 0x2f5baddb10cULL;
90419b94df9SMatthew Ahrens } else {
905be6fd75aSMatthew Ahrens return (SET_ERROR(EIO));
90619b94df9SMatthew Ahrens }
90719b94df9SMatthew Ahrens }
90888b7b0f2SMatthew Ahrens
909b5152584SMatthew Ahrens offset = zb->zb_blkid * blksz;
910b5152584SMatthew Ahrens
9115602294fSDan Kimmel if (split_large_blocks) {
912eb633035STom Caputi ASSERT0(arc_is_encrypted(abuf));
9135602294fSDan Kimmel ASSERT3U(arc_get_compression(abuf), ==,
9145602294fSDan Kimmel ZIO_COMPRESS_OFF);
915b5152584SMatthew Ahrens char *buf = abuf->b_data;
916b5152584SMatthew Ahrens while (blksz > 0 && err == 0) {
917b5152584SMatthew Ahrens int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE);
918a2cdcdd2SPaul Dagnelie err = dump_write(dsa, type, zb->zb_object,
9195602294fSDan Kimmel offset, n, n, NULL, buf);
920b5152584SMatthew Ahrens offset += n;
921b5152584SMatthew Ahrens buf += n;
922b5152584SMatthew Ahrens blksz -= n;
923b5152584SMatthew Ahrens }
924b5152584SMatthew Ahrens } else {
9255602294fSDan Kimmel err = dump_write(dsa, type, zb->zb_object, offset,
9265602294fSDan Kimmel blksz, arc_buf_size(abuf), bp, abuf->b_data);
927b5152584SMatthew Ahrens }
928dcbf3bd6SGeorge Wilson arc_buf_destroy(abuf, &abuf);
929efb80947Sahrens }
930efb80947Sahrens
931efb80947Sahrens ASSERT(err == 0 || err == EINTR);
932efb80947Sahrens return (err);
933efb80947Sahrens }
934efb80947Sahrens
9354445fffbSMatthew Ahrens /*
936a2cdcdd2SPaul Dagnelie * Pop the new data off the queue, and free the old data.
937a2cdcdd2SPaul Dagnelie */
938a2cdcdd2SPaul Dagnelie static struct send_block_record *
get_next_record(bqueue_t * bq,struct send_block_record * data)939a2cdcdd2SPaul Dagnelie get_next_record(bqueue_t *bq, struct send_block_record *data)
940a2cdcdd2SPaul Dagnelie {
941a2cdcdd2SPaul Dagnelie struct send_block_record *tmp = bqueue_dequeue(bq);
942a2cdcdd2SPaul Dagnelie kmem_free(data, sizeof (*data));
943a2cdcdd2SPaul Dagnelie return (tmp);
944a2cdcdd2SPaul Dagnelie }
945a2cdcdd2SPaul Dagnelie
946a2cdcdd2SPaul Dagnelie /*
947a2cdcdd2SPaul Dagnelie * Actually do the bulk of the work in a zfs send.
948a2cdcdd2SPaul Dagnelie *
949a2cdcdd2SPaul Dagnelie * Note: Releases dp using the specified tag.
9504445fffbSMatthew Ahrens */
9513b2aab18SMatthew Ahrens static int
dmu_send_impl(void * tag,dsl_pool_t * dp,dsl_dataset_t * to_ds,zfs_bookmark_phys_t * ancestor_zb,boolean_t is_clone,boolean_t embedok,boolean_t large_block_ok,boolean_t compressok,boolean_t rawok,int outfd,uint64_t resumeobj,uint64_t resumeoff,vnode_t * vp,offset_t * off)952a2cdcdd2SPaul Dagnelie dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds,
9535602294fSDan Kimmel zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone,
9545602294fSDan Kimmel boolean_t embedok, boolean_t large_block_ok, boolean_t compressok,
955eb633035STom Caputi boolean_t rawok, int outfd, uint64_t resumeobj, uint64_t resumeoff,
9569c3fd121SMatthew Ahrens vnode_t *vp, offset_t *off)
957efb80947Sahrens {
9583b2aab18SMatthew Ahrens objset_t *os;
959efb80947Sahrens dmu_replay_record_t *drr;
9604e3c9f44SBill Pijewski dmu_sendarg_t *dsp;
961efb80947Sahrens int err;
9623cb34c60Sahrens uint64_t fromtxg = 0;
9635d7b4d43SMatthew Ahrens uint64_t featureflags = 0;
9649c3fd121SMatthew Ahrens struct send_thread_arg to_arg = { 0 };
965efb80947Sahrens
966a2cdcdd2SPaul Dagnelie err = dmu_objset_from_ds(to_ds, &os);
9673b2aab18SMatthew Ahrens if (err != 0) {
9683b2aab18SMatthew Ahrens dsl_pool_rele(dp, tag);
9693b2aab18SMatthew Ahrens return (err);
9703b2aab18SMatthew Ahrens }
971efb80947Sahrens
972eb633035STom Caputi /*
973eb633035STom Caputi * If this is a non-raw send of an encrypted ds, we can ensure that
974eb633035STom Caputi * the objset_phys_t is authenticated. This is safe because this is
975eb633035STom Caputi * either a snapshot or we have owned the dataset, ensuring that
976eb633035STom Caputi * it can't be modified.
977eb633035STom Caputi */
978eb633035STom Caputi if (!rawok && os->os_encrypted &&
979eb633035STom Caputi arc_is_unauthenticated(os->os_phys_buf)) {
980eb633035STom Caputi zbookmark_phys_t zb;
981eb633035STom Caputi
982eb633035STom Caputi SET_BOOKMARK(&zb, to_ds->ds_object, ZB_ROOT_OBJECT,
983eb633035STom Caputi ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
984eb633035STom Caputi err = arc_untransform(os->os_phys_buf, os->os_spa,
985eb633035STom Caputi &zb, B_FALSE);
986eb633035STom Caputi if (err != 0) {
987eb633035STom Caputi dsl_pool_rele(dp, tag);
988eb633035STom Caputi return (err);
989eb633035STom Caputi }
990eb633035STom Caputi
991eb633035STom Caputi ASSERT0(arc_is_unauthenticated(os->os_phys_buf));
992eb633035STom Caputi }
993eb633035STom Caputi
994efb80947Sahrens drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
995efb80947Sahrens drr->drr_type = DRR_BEGIN;
996efb80947Sahrens drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
9979e69d7d0SLori Alt DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
9989e69d7d0SLori Alt DMU_SUBSTREAM);
999dc7cd546SMark Shellenbaum
1000dc7cd546SMark Shellenbaum #ifdef _KERNEL
10013b2aab18SMatthew Ahrens if (dmu_objset_type(os) == DMU_OST_ZFS) {
1002dc7cd546SMark Shellenbaum uint64_t version;
10033b2aab18SMatthew Ahrens if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) {
10044e3c9f44SBill Pijewski kmem_free(drr, sizeof (dmu_replay_record_t));
10053b2aab18SMatthew Ahrens dsl_pool_rele(dp, tag);
1006be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL));
10074e3c9f44SBill Pijewski }
10083b2aab18SMatthew Ahrens if (version >= ZPL_VERSION_SA) {
10095d7b4d43SMatthew Ahrens featureflags |= DMU_BACKUP_FEATURE_SA_SPILL;
1010dc7cd546SMark Shellenbaum }
1011dc7cd546SMark Shellenbaum }
1012dc7cd546SMark Shellenbaum #endif
1013dc7cd546SMark Shellenbaum
1014eb633035STom Caputi /* raw sends imply large_block_ok */
1015eb633035STom Caputi if ((large_block_ok || rawok) &&
1016eb633035STom Caputi to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS])
1017b5152584SMatthew Ahrens featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS;
101854811da5SToomas Soome if (to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_DNODE])
101954811da5SToomas Soome featureflags |= DMU_BACKUP_FEATURE_LARGE_DNODE;
1020eb633035STom Caputi
1021eb633035STom Caputi /* encrypted datasets will not have embedded blocks */
1022eb633035STom Caputi if ((embedok || rawok) && !os->os_encrypted &&
10235d7b4d43SMatthew Ahrens spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) {
10245d7b4d43SMatthew Ahrens featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA;
10255602294fSDan Kimmel }
1026eb633035STom Caputi
1027eb633035STom Caputi /* raw send implies compressok */
1028eb633035STom Caputi if (compressok || rawok)
10295602294fSDan Kimmel featureflags |= DMU_BACKUP_FEATURE_COMPRESSED;
1030eb633035STom Caputi if (rawok && os->os_encrypted)
1031eb633035STom Caputi featureflags |= DMU_BACKUP_FEATURE_RAW;
1032eb633035STom Caputi
10335602294fSDan Kimmel if ((featureflags &
1034eb633035STom Caputi (DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_COMPRESSED |
1035eb633035STom Caputi DMU_BACKUP_FEATURE_RAW)) != 0 &&
1036eb633035STom Caputi spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) {
10375602294fSDan Kimmel featureflags |= DMU_BACKUP_FEATURE_LZ4;
10385d7b4d43SMatthew Ahrens }
10395d7b4d43SMatthew Ahrens
10409c3fd121SMatthew Ahrens if (resumeobj != 0 || resumeoff != 0) {
10419c3fd121SMatthew Ahrens featureflags |= DMU_BACKUP_FEATURE_RESUMING;
10429c3fd121SMatthew Ahrens }
10439c3fd121SMatthew Ahrens
10445d7b4d43SMatthew Ahrens DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo,
10455d7b4d43SMatthew Ahrens featureflags);
10465d7b4d43SMatthew Ahrens
1047efb80947Sahrens drr->drr_u.drr_begin.drr_creation_time =
1048a2cdcdd2SPaul Dagnelie dsl_dataset_phys(to_ds)->ds_creation_time;
10493b2aab18SMatthew Ahrens drr->drr_u.drr_begin.drr_type = dmu_objset_type(os);
105078f17100SMatthew Ahrens if (is_clone)
10513cb34c60Sahrens drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
1052a2cdcdd2SPaul Dagnelie drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid;
1053a2cdcdd2SPaul Dagnelie if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET)
1054ab04eb8eStimh drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
1055880094b6SAndrew Stormont if (zfs_send_set_freerecords_bit)
1056880094b6SAndrew Stormont drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS;
1057ab04eb8eStimh
1058eb633035STom Caputi drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_SPILL_BLOCK;
1059eb633035STom Caputi
1060a2cdcdd2SPaul Dagnelie if (ancestor_zb != NULL) {
1061a2cdcdd2SPaul Dagnelie drr->drr_u.drr_begin.drr_fromguid =
1062a2cdcdd2SPaul Dagnelie ancestor_zb->zbm_guid;
1063a2cdcdd2SPaul Dagnelie fromtxg = ancestor_zb->zbm_creation_txg;
106478f17100SMatthew Ahrens }
1065a2cdcdd2SPaul Dagnelie dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname);
1066a2cdcdd2SPaul Dagnelie if (!to_ds->ds_is_snapshot) {
106778f17100SMatthew Ahrens (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--",
106878f17100SMatthew Ahrens sizeof (drr->drr_u.drr_begin.drr_toname));
10693b2aab18SMatthew Ahrens }
10703cb34c60Sahrens
10714e3c9f44SBill Pijewski dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP);
10724e3c9f44SBill Pijewski
10734e3c9f44SBill Pijewski dsp->dsa_drr = drr;
10744e3c9f44SBill Pijewski dsp->dsa_vp = vp;
10754e3c9f44SBill Pijewski dsp->dsa_outfd = outfd;
10764e3c9f44SBill Pijewski dsp->dsa_proc = curproc;
10773b2aab18SMatthew Ahrens dsp->dsa_os = os;
10784e3c9f44SBill Pijewski dsp->dsa_off = off;
1079a2cdcdd2SPaul Dagnelie dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid;
1080eb633035STom Caputi dsp->dsa_fromtxg = fromtxg;
10814e3c9f44SBill Pijewski dsp->dsa_pending_op = PENDING_NONE;
10825d7b4d43SMatthew Ahrens dsp->dsa_featureflags = featureflags;
10839c3fd121SMatthew Ahrens dsp->dsa_resume_object = resumeobj;
10849c3fd121SMatthew Ahrens dsp->dsa_resume_offset = resumeoff;
10854e3c9f44SBill Pijewski
1086a2cdcdd2SPaul Dagnelie mutex_enter(&to_ds->ds_sendstream_lock);
1087a2cdcdd2SPaul Dagnelie list_insert_head(&to_ds->ds_sendstreams, dsp);
1088a2cdcdd2SPaul Dagnelie mutex_exit(&to_ds->ds_sendstream_lock);
10894e3c9f44SBill Pijewski
1090a2cdcdd2SPaul Dagnelie dsl_dataset_long_hold(to_ds, FTAG);
1091de8d9cffSMatthew Ahrens dsl_pool_rele(dp, tag);
1092de8d9cffSMatthew Ahrens
10939c3fd121SMatthew Ahrens void *payload = NULL;
10949c3fd121SMatthew Ahrens size_t payload_len = 0;
1095eb633035STom Caputi /* handle features that require a DRR_BEGIN payload */
1096eb633035STom Caputi if (featureflags &
1097eb633035STom Caputi (DMU_BACKUP_FEATURE_RESUMING | DMU_BACKUP_FEATURE_RAW)) {
1098eb633035STom Caputi nvlist_t *keynvl = NULL;
10999c3fd121SMatthew Ahrens nvlist_t *nvl = fnvlist_alloc();
1100eb633035STom Caputi
1101eb633035STom Caputi if (featureflags & DMU_BACKUP_FEATURE_RESUMING) {
1102eb633035STom Caputi dmu_object_info_t to_doi;
1103eb633035STom Caputi err = dmu_object_info(os, resumeobj, &to_doi);
1104eb633035STom Caputi if (err != 0) {
1105eb633035STom Caputi fnvlist_free(nvl);
1106eb633035STom Caputi goto out;
1107eb633035STom Caputi }
1108eb633035STom Caputi
1109eb633035STom Caputi SET_BOOKMARK(&to_arg.resume, to_ds->ds_object,
1110eb633035STom Caputi resumeobj, 0,
1111eb633035STom Caputi resumeoff / to_doi.doi_data_block_size);
1112eb633035STom Caputi
1113eb633035STom Caputi fnvlist_add_uint64(nvl, "resume_object", resumeobj);
1114eb633035STom Caputi fnvlist_add_uint64(nvl, "resume_offset", resumeoff);
1115eb633035STom Caputi }
1116eb633035STom Caputi
1117eb633035STom Caputi if (featureflags & DMU_BACKUP_FEATURE_RAW) {
1118eb633035STom Caputi uint64_t ivset_guid = (ancestor_zb != NULL) ?
1119eb633035STom Caputi ancestor_zb->zbm_ivset_guid : 0;
1120eb633035STom Caputi
1121eb633035STom Caputi ASSERT(os->os_encrypted);
1122eb633035STom Caputi
1123eb633035STom Caputi err = dsl_crypto_populate_key_nvlist(to_ds,
1124eb633035STom Caputi ivset_guid, &keynvl);
1125eb633035STom Caputi if (err != 0) {
1126eb633035STom Caputi fnvlist_free(nvl);
1127eb633035STom Caputi goto out;
1128eb633035STom Caputi }
1129eb633035STom Caputi
1130eb633035STom Caputi fnvlist_add_nvlist(nvl, "crypt_keydata", keynvl);
1131eb633035STom Caputi }
1132eb633035STom Caputi
11339c3fd121SMatthew Ahrens payload = fnvlist_pack(nvl, &payload_len);
11349c3fd121SMatthew Ahrens drr->drr_payloadlen = payload_len;
1135eb633035STom Caputi fnvlist_free(keynvl);
11369c3fd121SMatthew Ahrens fnvlist_free(nvl);
11379c3fd121SMatthew Ahrens }
11389c3fd121SMatthew Ahrens
11399c3fd121SMatthew Ahrens err = dump_record(dsp, payload, payload_len);
11409c3fd121SMatthew Ahrens fnvlist_pack_free(payload, payload_len);
11419c3fd121SMatthew Ahrens if (err != 0) {
11424e3c9f44SBill Pijewski err = dsp->dsa_err;
11434e3c9f44SBill Pijewski goto out;
1144efb80947Sahrens }
1145efb80947Sahrens
11466ccda740Sloli err = bqueue_init(&to_arg.q,
11476ccda740Sloli MAX(zfs_send_queue_length, 2 * zfs_max_recordsize),
1148a2cdcdd2SPaul Dagnelie offsetof(struct send_block_record, ln));
1149a2cdcdd2SPaul Dagnelie to_arg.error_code = 0;
1150a2cdcdd2SPaul Dagnelie to_arg.cancel = B_FALSE;
1151a2cdcdd2SPaul Dagnelie to_arg.ds = to_ds;
1152a2cdcdd2SPaul Dagnelie to_arg.fromtxg = fromtxg;
1153a2cdcdd2SPaul Dagnelie to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH;
1154eb633035STom Caputi if (rawok)
1155eb633035STom Caputi to_arg.flags |= TRAVERSE_NO_DECRYPT;
1156a2cdcdd2SPaul Dagnelie (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, curproc,
1157a2cdcdd2SPaul Dagnelie TS_RUN, minclsyspri);
1158a2cdcdd2SPaul Dagnelie
1159a2cdcdd2SPaul Dagnelie struct send_block_record *to_data;
1160a2cdcdd2SPaul Dagnelie to_data = bqueue_dequeue(&to_arg.q);
1161a2cdcdd2SPaul Dagnelie
1162a2cdcdd2SPaul Dagnelie while (!to_data->eos_marker && err == 0) {
1163a2cdcdd2SPaul Dagnelie err = do_dump(dsp, to_data);
1164a2cdcdd2SPaul Dagnelie to_data = get_next_record(&to_arg.q, to_data);
1165a2cdcdd2SPaul Dagnelie if (issig(JUSTLOOKING) && issig(FORREAL))
1166a2cdcdd2SPaul Dagnelie err = EINTR;
1167a2cdcdd2SPaul Dagnelie }
1168a2cdcdd2SPaul Dagnelie
1169a2cdcdd2SPaul Dagnelie if (err != 0) {
1170a2cdcdd2SPaul Dagnelie to_arg.cancel = B_TRUE;
1171a2cdcdd2SPaul Dagnelie while (!to_data->eos_marker) {
1172a2cdcdd2SPaul Dagnelie to_data = get_next_record(&to_arg.q, to_data);
1173a2cdcdd2SPaul Dagnelie }
1174a2cdcdd2SPaul Dagnelie }
1175a2cdcdd2SPaul Dagnelie kmem_free(to_data, sizeof (*to_data));
1176a2cdcdd2SPaul Dagnelie
1177a2cdcdd2SPaul Dagnelie bqueue_destroy(&to_arg.q);
1178a2cdcdd2SPaul Dagnelie
1179a2cdcdd2SPaul Dagnelie if (err == 0 && to_arg.error_code != 0)
1180a2cdcdd2SPaul Dagnelie err = to_arg.error_code;
1181a2cdcdd2SPaul Dagnelie
1182a2cdcdd2SPaul Dagnelie if (err != 0)
1183a2cdcdd2SPaul Dagnelie goto out;
1184efb80947Sahrens
11854e3c9f44SBill Pijewski if (dsp->dsa_pending_op != PENDING_NONE)
118698110f08SMatthew Ahrens if (dump_record(dsp, NULL, 0) != 0)
1187be6fd75aSMatthew Ahrens err = SET_ERROR(EINTR);
11889e69d7d0SLori Alt
11893b2aab18SMatthew Ahrens if (err != 0) {
11903b2aab18SMatthew Ahrens if (err == EINTR && dsp->dsa_err != 0)
11914e3c9f44SBill Pijewski err = dsp->dsa_err;
11924e3c9f44SBill Pijewski goto out;
1193efb80947Sahrens }
1194efb80947Sahrens
1195efb80947Sahrens bzero(drr, sizeof (dmu_replay_record_t));
1196efb80947Sahrens drr->drr_type = DRR_END;
11974e3c9f44SBill Pijewski drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc;
11984e3c9f44SBill Pijewski drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid;
1199efb80947Sahrens
1200a2cdcdd2SPaul Dagnelie if (dump_record(dsp, NULL, 0) != 0)
12014e3c9f44SBill Pijewski err = dsp->dsa_err;
12024e3c9f44SBill Pijewski out:
1203a2cdcdd2SPaul Dagnelie mutex_enter(&to_ds->ds_sendstream_lock);
1204a2cdcdd2SPaul Dagnelie list_remove(&to_ds->ds_sendstreams, dsp);
1205a2cdcdd2SPaul Dagnelie mutex_exit(&to_ds->ds_sendstream_lock);
12064e3c9f44SBill Pijewski
120712b90ee2SMatt Krantz VERIFY(err != 0 || (dsp->dsa_sent_begin && dsp->dsa_sent_end));
120812b90ee2SMatt Krantz
1209efb80947Sahrens kmem_free(drr, sizeof (dmu_replay_record_t));
12104e3c9f44SBill Pijewski kmem_free(dsp, sizeof (dmu_sendarg_t));
1211efb80947Sahrens
1212a2cdcdd2SPaul Dagnelie dsl_dataset_long_rele(to_ds, FTAG);
12133b2aab18SMatthew Ahrens
12144e3c9f44SBill Pijewski return (err);
1215efb80947Sahrens }
1216efb80947Sahrens
121719b94df9SMatthew Ahrens int
dmu_send_obj(const char * pool,uint64_t tosnap,uint64_t fromsnap,boolean_t embedok,boolean_t large_block_ok,boolean_t compressok,boolean_t rawok,int outfd,vnode_t * vp,offset_t * off)12183b2aab18SMatthew Ahrens dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
12195602294fSDan Kimmel boolean_t embedok, boolean_t large_block_ok, boolean_t compressok,
1220eb633035STom Caputi boolean_t rawok, int outfd, vnode_t *vp, offset_t *off)
12213b2aab18SMatthew Ahrens {
12223b2aab18SMatthew Ahrens dsl_pool_t *dp;
12233b2aab18SMatthew Ahrens dsl_dataset_t *ds;
12243b2aab18SMatthew Ahrens dsl_dataset_t *fromds = NULL;
1225*ef96fc31SToomas Soome ds_hold_flags_t dsflags;
12263b2aab18SMatthew Ahrens int err;
12273b2aab18SMatthew Ahrens
1228*ef96fc31SToomas Soome dsflags = (rawok) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT;
12293b2aab18SMatthew Ahrens err = dsl_pool_hold(pool, FTAG, &dp);
12303b2aab18SMatthew Ahrens if (err != 0)
12313b2aab18SMatthew Ahrens return (err);
12323b2aab18SMatthew Ahrens
1233eb633035STom Caputi err = dsl_dataset_hold_obj_flags(dp, tosnap, dsflags, FTAG, &ds);
12343b2aab18SMatthew Ahrens if (err != 0) {
12353b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG);
12363b2aab18SMatthew Ahrens return (err);
12373b2aab18SMatthew Ahrens }
12383b2aab18SMatthew Ahrens
12393b2aab18SMatthew Ahrens if (fromsnap != 0) {
1240eb633035STom Caputi zfs_bookmark_phys_t zb = { 0 };
124178f17100SMatthew Ahrens boolean_t is_clone;
124278f17100SMatthew Ahrens
12433b2aab18SMatthew Ahrens err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds);
12443b2aab18SMatthew Ahrens if (err != 0) {
1245eb633035STom Caputi dsl_dataset_rele_flags(ds, dsflags, FTAG);
12463b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG);
12473b2aab18SMatthew Ahrens return (err);
12483b2aab18SMatthew Ahrens }
1249eb633035STom Caputi if (!dsl_dataset_is_before(ds, fromds, 0)) {
125078f17100SMatthew Ahrens err = SET_ERROR(EXDEV);
1251eb633035STom Caputi dsl_dataset_rele(fromds, FTAG);
1252eb633035STom Caputi dsl_dataset_rele_flags(ds, dsflags, FTAG);
1253eb633035STom Caputi dsl_pool_rele(dp, FTAG);
1254eb633035STom Caputi return (err);
1255eb633035STom Caputi }
1256eb633035STom Caputi
1257c1379625SJustin T. Gibbs zb.zbm_creation_time =
1258c1379625SJustin T. Gibbs dsl_dataset_phys(fromds)->ds_creation_time;
1259c1379625SJustin T. Gibbs zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg;
1260c1379625SJustin T. Gibbs zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
1261eb633035STom Caputi
1262eb633035STom Caputi if (dsl_dataset_is_zapified(fromds)) {
1263eb633035STom Caputi (void) zap_lookup(dp->dp_meta_objset,
1264eb633035STom Caputi fromds->ds_object, DS_FIELD_IVSET_GUID, 8, 1,
1265eb633035STom Caputi &zb.zbm_ivset_guid);
1266eb633035STom Caputi }
1267eb633035STom Caputi
126878f17100SMatthew Ahrens is_clone = (fromds->ds_dir != ds->ds_dir);
126978f17100SMatthew Ahrens dsl_dataset_rele(fromds, FTAG);
1270b5152584SMatthew Ahrens err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone,
1271eb633035STom Caputi embedok, large_block_ok, compressok, rawok, outfd,
1272eb633035STom Caputi 0, 0, vp, off);
127378f17100SMatthew Ahrens } else {
1274b5152584SMatthew Ahrens err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE,
1275eb633035STom Caputi embedok, large_block_ok, compressok, rawok, outfd,
1276eb633035STom Caputi 0, 0, vp, off);
12773b2aab18SMatthew Ahrens }
1278eb633035STom Caputi dsl_dataset_rele_flags(ds, dsflags, FTAG);
127978f17100SMatthew Ahrens return (err);
12803b2aab18SMatthew Ahrens }
12813b2aab18SMatthew Ahrens
12823b2aab18SMatthew Ahrens int
dmu_send(const char * tosnap,const char * fromsnap,boolean_t embedok,boolean_t large_block_ok,boolean_t compressok,boolean_t rawok,int outfd,uint64_t resumeobj,uint64_t resumeoff,vnode_t * vp,offset_t * off)12839c3fd121SMatthew Ahrens dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
1284eb633035STom Caputi boolean_t large_block_ok, boolean_t compressok, boolean_t rawok,
1285eb633035STom Caputi int outfd, uint64_t resumeobj, uint64_t resumeoff, vnode_t *vp,
1286eb633035STom Caputi offset_t *off)
12873b2aab18SMatthew Ahrens {
12883b2aab18SMatthew Ahrens dsl_pool_t *dp;
12893b2aab18SMatthew Ahrens dsl_dataset_t *ds;
12903b2aab18SMatthew Ahrens int err;
1291*ef96fc31SToomas Soome ds_hold_flags_t dsflags;
129278f17100SMatthew Ahrens boolean_t owned = B_FALSE;
12933b2aab18SMatthew Ahrens
1294*ef96fc31SToomas Soome dsflags = (rawok) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT;
129578f17100SMatthew Ahrens if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL)
1296be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL));
12973b2aab18SMatthew Ahrens
12983b2aab18SMatthew Ahrens err = dsl_pool_hold(tosnap, FTAG, &dp);
12993b2aab18SMatthew Ahrens if (err != 0)
13003b2aab18SMatthew Ahrens return (err);
130178f17100SMatthew Ahrens if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) {
130278f17100SMatthew Ahrens /*
130378f17100SMatthew Ahrens * We are sending a filesystem or volume. Ensure
130478f17100SMatthew Ahrens * that it doesn't change by owning the dataset.
130578f17100SMatthew Ahrens */
1306eb633035STom Caputi err = dsl_dataset_own(dp, tosnap, dsflags, FTAG, &ds);
130778f17100SMatthew Ahrens owned = B_TRUE;
130878f17100SMatthew Ahrens } else {
1309eb633035STom Caputi err = dsl_dataset_hold_flags(dp, tosnap, dsflags, FTAG, &ds);
131078f17100SMatthew Ahrens }
13113b2aab18SMatthew Ahrens if (err != 0) {
13123b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG);
13133b2aab18SMatthew Ahrens return (err);
13143b2aab18SMatthew Ahrens }
13153b2aab18SMatthew Ahrens
13163b2aab18SMatthew Ahrens if (fromsnap != NULL) {
1317eb633035STom Caputi zfs_bookmark_phys_t zb = { 0 };
131878f17100SMatthew Ahrens boolean_t is_clone = B_FALSE;
131978f17100SMatthew Ahrens int fsnamelen = strchr(tosnap, '@') - tosnap;
132078f17100SMatthew Ahrens
132178f17100SMatthew Ahrens /*
132278f17100SMatthew Ahrens * If the fromsnap is in a different filesystem, then
132378f17100SMatthew Ahrens * mark the send stream as a clone.
132478f17100SMatthew Ahrens */
132578f17100SMatthew Ahrens if (strncmp(tosnap, fromsnap, fsnamelen) != 0 ||
132678f17100SMatthew Ahrens (fromsnap[fsnamelen] != '@' &&
132778f17100SMatthew Ahrens fromsnap[fsnamelen] != '#')) {
132878f17100SMatthew Ahrens is_clone = B_TRUE;
132978f17100SMatthew Ahrens }
133078f17100SMatthew Ahrens
133178f17100SMatthew Ahrens if (strchr(fromsnap, '@')) {
133278f17100SMatthew Ahrens dsl_dataset_t *fromds;
133378f17100SMatthew Ahrens err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds);
133478f17100SMatthew Ahrens if (err == 0) {
133578f17100SMatthew Ahrens if (!dsl_dataset_is_before(ds, fromds, 0))
133678f17100SMatthew Ahrens err = SET_ERROR(EXDEV);
133778f17100SMatthew Ahrens zb.zbm_creation_time =
1338c1379625SJustin T. Gibbs dsl_dataset_phys(fromds)->ds_creation_time;
133978f17100SMatthew Ahrens zb.zbm_creation_txg =
1340c1379625SJustin T. Gibbs dsl_dataset_phys(fromds)->ds_creation_txg;
1341c1379625SJustin T. Gibbs zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
134278f17100SMatthew Ahrens is_clone = (ds->ds_dir != fromds->ds_dir);
1343eb633035STom Caputi
1344eb633035STom Caputi if (dsl_dataset_is_zapified(fromds)) {
1345eb633035STom Caputi (void) zap_lookup(dp->dp_meta_objset,
1346eb633035STom Caputi fromds->ds_object,
1347eb633035STom Caputi DS_FIELD_IVSET_GUID, 8, 1,
1348eb633035STom Caputi &zb.zbm_ivset_guid);
1349eb633035STom Caputi }
135078f17100SMatthew Ahrens dsl_dataset_rele(fromds, FTAG);
135178f17100SMatthew Ahrens }
135278f17100SMatthew Ahrens } else {
135378f17100SMatthew Ahrens err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb);
135478f17100SMatthew Ahrens }
13553b2aab18SMatthew Ahrens if (err != 0) {
1356eb633035STom Caputi if (owned)
1357eb633035STom Caputi dsl_dataset_disown(ds, dsflags, FTAG);
1358eb633035STom Caputi else
1359eb633035STom Caputi dsl_dataset_rele_flags(ds, dsflags, FTAG);
1360eb633035STom Caputi
13613b2aab18SMatthew Ahrens dsl_pool_rele(dp, FTAG);
13623b2aab18SMatthew Ahrens return (err);
13633b2aab18SMatthew Ahrens }
1364b5152584SMatthew Ahrens err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone,
1365eb633035STom Caputi embedok, large_block_ok, compressok, rawok,
13669c3fd121SMatthew Ahrens outfd, resumeobj, resumeoff, vp, off);
136778f17100SMatthew Ahrens } else {
1368b5152584SMatthew Ahrens err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE,
1369eb633035STom Caputi embedok, large_block_ok, compressok, rawok,
13709c3fd121SMatthew Ahrens outfd, resumeobj, resumeoff, vp, off);
13713b2aab18SMatthew Ahrens }
137278f17100SMatthew Ahrens if (owned)
1373eb633035STom Caputi dsl_dataset_disown(ds, dsflags, FTAG);
137478f17100SMatthew Ahrens else
1375eb633035STom Caputi dsl_dataset_rele_flags(ds, dsflags, FTAG);
1376eb633035STom Caputi
137778f17100SMatthew Ahrens return (err);
13783b2aab18SMatthew Ahrens }
13793b2aab18SMatthew Ahrens
1380643da460SMax Grossman static int
dmu_adjust_send_estimate_for_indirects(dsl_dataset_t * ds,uint64_t uncompressed,uint64_t compressed,boolean_t stream_compressed,uint64_t * sizep)13815602294fSDan Kimmel dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t uncompressed,
13825602294fSDan Kimmel uint64_t compressed, boolean_t stream_compressed, uint64_t *sizep)
1383643da460SMax Grossman {
1384df477c0aSPaul Dagnelie int err = 0;
13855602294fSDan Kimmel uint64_t size;
1386643da460SMax Grossman /*
1387643da460SMax Grossman * Assume that space (both on-disk and in-stream) is dominated by
1388643da460SMax Grossman * data. We will adjust for indirect blocks and the copies property,
1389643da460SMax Grossman * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
1390643da460SMax Grossman */
13915602294fSDan Kimmel uint64_t recordsize;
13925602294fSDan Kimmel uint64_t record_count;
13930255edccSPaul Dagnelie objset_t *os;
13940255edccSPaul Dagnelie VERIFY0(dmu_objset_from_ds(ds, &os));
13955602294fSDan Kimmel
13965602294fSDan Kimmel /* Assume all (uncompressed) blocks are recordsize. */
1397df477c0aSPaul Dagnelie if (zfs_override_estimate_recordsize != 0) {
1398df477c0aSPaul Dagnelie recordsize = zfs_override_estimate_recordsize;
1399df477c0aSPaul Dagnelie } else if (os->os_phys->os_type == DMU_OST_ZVOL) {
14000255edccSPaul Dagnelie err = dsl_prop_get_int_ds(ds,
14010255edccSPaul Dagnelie zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &recordsize);
14020255edccSPaul Dagnelie } else {
14030255edccSPaul Dagnelie err = dsl_prop_get_int_ds(ds,
14040255edccSPaul Dagnelie zfs_prop_to_name(ZFS_PROP_RECORDSIZE), &recordsize);
14050255edccSPaul Dagnelie }
14065602294fSDan Kimmel if (err != 0)
14075602294fSDan Kimmel return (err);
14085602294fSDan Kimmel record_count = uncompressed / recordsize;
14095602294fSDan Kimmel
14105602294fSDan Kimmel /*
14115602294fSDan Kimmel * If we're estimating a send size for a compressed stream, use the
14125602294fSDan Kimmel * compressed data size to estimate the stream size. Otherwise, use the
14135602294fSDan Kimmel * uncompressed data size.
14145602294fSDan Kimmel */
14155602294fSDan Kimmel size = stream_compressed ? compressed : uncompressed;
1416643da460SMax Grossman
1417643da460SMax Grossman /*
1418643da460SMax Grossman * Subtract out approximate space used by indirect blocks.
1419643da460SMax Grossman * Assume most space is used by data blocks (non-indirect, non-dnode).
14205602294fSDan Kimmel * Assume no ditto blocks or internal fragmentation.
1421643da460SMax Grossman *
1422643da460SMax Grossman * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
14235602294fSDan Kimmel * block.
1424643da460SMax Grossman */
14255602294fSDan Kimmel size -= record_count * sizeof (blkptr_t);
1426643da460SMax Grossman
1427643da460SMax Grossman /* Add in the space for the record associated with each block. */
14285602294fSDan Kimmel size += record_count * sizeof (dmu_replay_record_t);
1429643da460SMax Grossman
1430643da460SMax Grossman *sizep = size;
1431643da460SMax Grossman
1432643da460SMax Grossman return (0);
1433643da460SMax Grossman }
1434643da460SMax Grossman
14353b2aab18SMatthew Ahrens int
dmu_send_estimate(dsl_dataset_t * ds,dsl_dataset_t * fromds,boolean_t stream_compressed,uint64_t * sizep)14365602294fSDan Kimmel dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds,
14375602294fSDan Kimmel boolean_t stream_compressed, uint64_t *sizep)
143819b94df9SMatthew Ahrens {
143919b94df9SMatthew Ahrens dsl_pool_t *dp = ds->ds_dir->dd_pool;
144019b94df9SMatthew Ahrens int err;
14415602294fSDan Kimmel uint64_t uncomp, comp;
144219b94df9SMatthew Ahrens
14433b2aab18SMatthew Ahrens ASSERT(dsl_pool_config_held(dp));
14443b2aab18SMatthew Ahrens
144519b94df9SMatthew Ahrens /* tosnap must be a snapshot */
1446bc9014e6SJustin Gibbs if (!ds->ds_is_snapshot)
1447be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL));
144819b94df9SMatthew Ahrens
144924218bebSAndriy Gapon /* fromsnap, if provided, must be a snapshot */
145024218bebSAndriy Gapon if (fromds != NULL && !fromds->ds_is_snapshot)
145124218bebSAndriy Gapon return (SET_ERROR(EINVAL));
145224218bebSAndriy Gapon
14534445fffbSMatthew Ahrens /*
14544445fffbSMatthew Ahrens * fromsnap must be an earlier snapshot from the same fs as tosnap,
14554445fffbSMatthew Ahrens * or the origin's fs.
14564445fffbSMatthew Ahrens */
145778f17100SMatthew Ahrens if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0))
1458be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV));
145919b94df9SMatthew Ahrens
14605602294fSDan Kimmel /* Get compressed and uncompressed size estimates of changed data. */
146119b94df9SMatthew Ahrens if (fromds == NULL) {
14625602294fSDan Kimmel uncomp = dsl_dataset_phys(ds)->ds_uncompressed_bytes;
14635602294fSDan Kimmel comp = dsl_dataset_phys(ds)->ds_compressed_bytes;
146419b94df9SMatthew Ahrens } else {
14655602294fSDan Kimmel uint64_t used;
146619b94df9SMatthew Ahrens err = dsl_dataset_space_written(fromds, ds,
14675602294fSDan Kimmel &used, &comp, &uncomp);
14683b2aab18SMatthew Ahrens if (err != 0)
146919b94df9SMatthew Ahrens return (err);
147019b94df9SMatthew Ahrens }
147119b94df9SMatthew Ahrens
14725602294fSDan Kimmel err = dmu_adjust_send_estimate_for_indirects(ds, uncomp, comp,
14735602294fSDan Kimmel stream_compressed, sizep);
14740255edccSPaul Dagnelie /*
14750255edccSPaul Dagnelie * Add the size of the BEGIN and END records to the estimate.
14760255edccSPaul Dagnelie */
14770255edccSPaul Dagnelie *sizep += 2 * sizeof (dmu_replay_record_t);
1478643da460SMax Grossman return (err);
1479643da460SMax Grossman }
1480643da460SMax Grossman
14815602294fSDan Kimmel struct calculate_send_arg {
14825602294fSDan Kimmel uint64_t uncompressed;
14835602294fSDan Kimmel uint64_t compressed;
14845602294fSDan Kimmel };
14855602294fSDan Kimmel
1486643da460SMax Grossman /*
1487643da460SMax Grossman * Simple callback used to traverse the blocks of a snapshot and sum their
14885602294fSDan Kimmel * uncompressed and compressed sizes.
1489643da460SMax Grossman */
1490643da460SMax Grossman /* ARGSUSED */
1491643da460SMax Grossman static int
dmu_calculate_send_traversal(spa_t * spa,zilog_t * zilog,const blkptr_t * bp,const zbookmark_phys_t * zb,const dnode_phys_t * dnp,void * arg)1492643da460SMax Grossman dmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1493643da460SMax Grossman const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
1494643da460SMax Grossman {
14955602294fSDan Kimmel struct calculate_send_arg *space = arg;
1496643da460SMax Grossman if (bp != NULL && !BP_IS_HOLE(bp)) {
14975602294fSDan Kimmel space->uncompressed += BP_GET_UCSIZE(bp);
14985602294fSDan Kimmel space->compressed += BP_GET_PSIZE(bp);
1499643da460SMax Grossman }
1500643da460SMax Grossman return (0);
1501643da460SMax Grossman }
1502643da460SMax Grossman
1503643da460SMax Grossman /*
1504643da460SMax Grossman * Given a desination snapshot and a TXG, calculate the approximate size of a
1505643da460SMax Grossman * send stream sent from that TXG. from_txg may be zero, indicating that the
1506643da460SMax Grossman * whole snapshot will be sent.
1507643da460SMax Grossman */
1508643da460SMax Grossman int
dmu_send_estimate_from_txg(dsl_dataset_t * ds,uint64_t from_txg,boolean_t stream_compressed,uint64_t * sizep)1509643da460SMax Grossman dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg,
15105602294fSDan Kimmel boolean_t stream_compressed, uint64_t *sizep)
1511643da460SMax Grossman {
1512643da460SMax Grossman dsl_pool_t *dp = ds->ds_dir->dd_pool;
1513643da460SMax Grossman int err;
15145602294fSDan Kimmel struct calculate_send_arg size = { 0 };
1515643da460SMax Grossman
1516643da460SMax Grossman ASSERT(dsl_pool_config_held(dp));
1517643da460SMax Grossman
1518643da460SMax Grossman /* tosnap must be a snapshot */
15195602294fSDan Kimmel if (!ds->ds_is_snapshot)
1520643da460SMax Grossman return (SET_ERROR(EINVAL));
1521643da460SMax Grossman
1522643da460SMax Grossman /* verify that from_txg is before the provided snapshot was taken */
1523643da460SMax Grossman if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) {
1524643da460SMax Grossman return (SET_ERROR(EXDEV));
1525643da460SMax Grossman }
152619b94df9SMatthew Ahrens
152719b94df9SMatthew Ahrens /*
1528643da460SMax Grossman * traverse the blocks of the snapshot with birth times after
1529643da460SMax Grossman * from_txg, summing their uncompressed size
153019b94df9SMatthew Ahrens */
1531eb633035STom Caputi err = traverse_dataset(ds, from_txg,
1532eb633035STom Caputi TRAVERSE_POST | TRAVERSE_NO_DECRYPT,
1533643da460SMax Grossman dmu_calculate_send_traversal, &size);
1534643da460SMax Grossman if (err)
153519b94df9SMatthew Ahrens return (err);
153619b94df9SMatthew Ahrens
15375602294fSDan Kimmel err = dmu_adjust_send_estimate_for_indirects(ds, size.uncompressed,
15385602294fSDan Kimmel size.compressed, stream_compressed, sizep);
1539643da460SMax Grossman return (err);
154019b94df9SMatthew Ahrens }
1541