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Diffstat (limited to 'cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c')
-rw-r--r--cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c3924
1 files changed, 0 insertions, 3924 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
deleted file mode 100644
index 2e2e1020ad8a..000000000000
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c
+++ /dev/null
@@ -1,3924 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
- * Copyright (c) 2012, Joyent, Inc. All rights reserved.
- * Copyright (c) 2012 Pawel Jakub Dawidek. All rights reserved.
- * Copyright (c) 2013 Steven Hartland. All rights reserved.
- * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
- * Copyright (c) 2014 Integros [integros.com]
- * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
- * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
- * Copyright (c) 2019 Datto Inc.
- */
-
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include <libintl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <strings.h>
-#include <unistd.h>
-#include <stddef.h>
-#include <fcntl.h>
-#include <sys/param.h>
-#include <sys/mount.h>
-#include <pthread.h>
-#include <umem.h>
-#include <time.h>
-
-#include <libzfs.h>
-#include <libzfs_core.h>
-
-#include "zfs_namecheck.h"
-#include "zfs_prop.h"
-#include "zfs_fletcher.h"
-#include "libzfs_impl.h"
-#include <zlib.h>
-#include <sha2.h>
-#include <sys/zio_checksum.h>
-#include <sys/ddt.h>
-
-#ifdef __FreeBSD__
-extern int zfs_ioctl_version;
-#endif
-
-/* in libzfs_dataset.c */
-extern void zfs_setprop_error(libzfs_handle_t *, zfs_prop_t, int, char *);
-/* We need to use something for ENODATA. */
-#define ENODATA EIDRM
-
-static int zfs_receive_impl(libzfs_handle_t *, const char *, const char *,
- recvflags_t *, int, const char *, nvlist_t *, avl_tree_t *, char **, int,
- uint64_t *, const char *);
-static int guid_to_name(libzfs_handle_t *, const char *,
- uint64_t, boolean_t, char *);
-
-static const zio_cksum_t zero_cksum = { 0 };
-
-typedef struct dedup_arg {
- int inputfd;
- int outputfd;
- libzfs_handle_t *dedup_hdl;
-} dedup_arg_t;
-
-typedef struct progress_arg {
- zfs_handle_t *pa_zhp;
- int pa_fd;
- boolean_t pa_parsable;
- boolean_t pa_astitle;
- uint64_t pa_size;
-} progress_arg_t;
-
-typedef struct dataref {
- uint64_t ref_guid;
- uint64_t ref_object;
- uint64_t ref_offset;
-} dataref_t;
-
-typedef struct dedup_entry {
- struct dedup_entry *dde_next;
- zio_cksum_t dde_chksum;
- uint64_t dde_prop;
- dataref_t dde_ref;
-} dedup_entry_t;
-
-#define MAX_DDT_PHYSMEM_PERCENT 20
-#define SMALLEST_POSSIBLE_MAX_DDT_MB 128
-
-typedef struct dedup_table {
- dedup_entry_t **dedup_hash_array;
- umem_cache_t *ddecache;
- uint64_t max_ddt_size; /* max dedup table size in bytes */
- uint64_t cur_ddt_size; /* current dedup table size in bytes */
- uint64_t ddt_count;
- int numhashbits;
- boolean_t ddt_full;
-} dedup_table_t;
-
-static int
-high_order_bit(uint64_t n)
-{
- int count;
-
- for (count = 0; n != 0; count++)
- n >>= 1;
- return (count);
-}
-
-static size_t
-ssread(void *buf, size_t len, FILE *stream)
-{
- size_t outlen;
-
- if ((outlen = fread(buf, len, 1, stream)) == 0)
- return (0);
-
- return (outlen);
-}
-
-static void
-ddt_hash_append(libzfs_handle_t *hdl, dedup_table_t *ddt, dedup_entry_t **ddepp,
- zio_cksum_t *cs, uint64_t prop, dataref_t *dr)
-{
- dedup_entry_t *dde;
-
- if (ddt->cur_ddt_size >= ddt->max_ddt_size) {
- if (ddt->ddt_full == B_FALSE) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "Dedup table full. Deduplication will continue "
- "with existing table entries"));
- ddt->ddt_full = B_TRUE;
- }
- return;
- }
-
- if ((dde = umem_cache_alloc(ddt->ddecache, UMEM_DEFAULT))
- != NULL) {
- assert(*ddepp == NULL);
- dde->dde_next = NULL;
- dde->dde_chksum = *cs;
- dde->dde_prop = prop;
- dde->dde_ref = *dr;
- *ddepp = dde;
- ddt->cur_ddt_size += sizeof (dedup_entry_t);
- ddt->ddt_count++;
- }
-}
-
-/*
- * Using the specified dedup table, do a lookup for an entry with
- * the checksum cs. If found, return the block's reference info
- * in *dr. Otherwise, insert a new entry in the dedup table, using
- * the reference information specified by *dr.
- *
- * return value: true - entry was found
- * false - entry was not found
- */
-static boolean_t
-ddt_update(libzfs_handle_t *hdl, dedup_table_t *ddt, zio_cksum_t *cs,
- uint64_t prop, dataref_t *dr)
-{
- uint32_t hashcode;
- dedup_entry_t **ddepp;
-
- hashcode = BF64_GET(cs->zc_word[0], 0, ddt->numhashbits);
-
- for (ddepp = &(ddt->dedup_hash_array[hashcode]); *ddepp != NULL;
- ddepp = &((*ddepp)->dde_next)) {
- if (ZIO_CHECKSUM_EQUAL(((*ddepp)->dde_chksum), *cs) &&
- (*ddepp)->dde_prop == prop) {
- *dr = (*ddepp)->dde_ref;
- return (B_TRUE);
- }
- }
- ddt_hash_append(hdl, ddt, ddepp, cs, prop, dr);
- return (B_FALSE);
-}
-
-static int
-dump_record(dmu_replay_record_t *drr, void *payload, int payload_len,
- zio_cksum_t *zc, int outfd)
-{
- ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
- ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t));
- (void) fletcher_4_incremental_native(drr,
- offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), zc);
- if (drr->drr_type != DRR_BEGIN) {
- ASSERT(ZIO_CHECKSUM_IS_ZERO(&drr->drr_u.
- drr_checksum.drr_checksum));
- drr->drr_u.drr_checksum.drr_checksum = *zc;
- }
- (void) fletcher_4_incremental_native(
- &drr->drr_u.drr_checksum.drr_checksum, sizeof (zio_cksum_t), zc);
- if (write(outfd, drr, sizeof (*drr)) == -1)
- return (errno);
- if (payload_len != 0) {
- (void) fletcher_4_incremental_native(payload, payload_len, zc);
- if (write(outfd, payload, payload_len) == -1)
- return (errno);
- }
- return (0);
-}
-
-/*
- * This function is started in a separate thread when the dedup option
- * has been requested. The main send thread determines the list of
- * snapshots to be included in the send stream and makes the ioctl calls
- * for each one. But instead of having the ioctl send the output to the
- * the output fd specified by the caller of zfs_send()), the
- * ioctl is told to direct the output to a pipe, which is read by the
- * alternate thread running THIS function. This function does the
- * dedup'ing by:
- * 1. building a dedup table (the DDT)
- * 2. doing checksums on each data block and inserting a record in the DDT
- * 3. looking for matching checksums, and
- * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever
- * a duplicate block is found.
- * The output of this function then goes to the output fd requested
- * by the caller of zfs_send().
- */
-static void *
-cksummer(void *arg)
-{
- dedup_arg_t *dda = arg;
- char *buf = zfs_alloc(dda->dedup_hdl, SPA_MAXBLOCKSIZE);
- dmu_replay_record_t thedrr;
- dmu_replay_record_t *drr = &thedrr;
- FILE *ofp;
- int outfd;
- dedup_table_t ddt;
- zio_cksum_t stream_cksum;
- uint64_t physmem = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE);
- uint64_t numbuckets;
-
- ddt.max_ddt_size =
- MAX((physmem * MAX_DDT_PHYSMEM_PERCENT) / 100,
- SMALLEST_POSSIBLE_MAX_DDT_MB << 20);
-
- numbuckets = ddt.max_ddt_size / (sizeof (dedup_entry_t));
-
- /*
- * numbuckets must be a power of 2. Increase number to
- * a power of 2 if necessary.
- */
- if (!ISP2(numbuckets))
- numbuckets = 1 << high_order_bit(numbuckets);
-
- ddt.dedup_hash_array = calloc(numbuckets, sizeof (dedup_entry_t *));
- ddt.ddecache = umem_cache_create("dde", sizeof (dedup_entry_t), 0,
- NULL, NULL, NULL, NULL, NULL, 0);
- ddt.cur_ddt_size = numbuckets * sizeof (dedup_entry_t *);
- ddt.numhashbits = high_order_bit(numbuckets) - 1;
- ddt.ddt_full = B_FALSE;
-
- outfd = dda->outputfd;
- ofp = fdopen(dda->inputfd, "r");
- while (ssread(drr, sizeof (*drr), ofp) != 0) {
-
- /*
- * kernel filled in checksum, we are going to write same
- * record, but need to regenerate checksum.
- */
- if (drr->drr_type != DRR_BEGIN) {
- bzero(&drr->drr_u.drr_checksum.drr_checksum,
- sizeof (drr->drr_u.drr_checksum.drr_checksum));
- }
-
- switch (drr->drr_type) {
- case DRR_BEGIN:
- {
- struct drr_begin *drrb = &drr->drr_u.drr_begin;
- int fflags;
- int sz = 0;
- ZIO_SET_CHECKSUM(&stream_cksum, 0, 0, 0, 0);
-
- ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
-
- /* set the DEDUP feature flag for this stream */
- fflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- fflags |= (DMU_BACKUP_FEATURE_DEDUP |
- DMU_BACKUP_FEATURE_DEDUPPROPS);
- DMU_SET_FEATUREFLAGS(drrb->drr_versioninfo, fflags);
-
- if (drr->drr_payloadlen != 0) {
- sz = drr->drr_payloadlen;
-
- if (sz > SPA_MAXBLOCKSIZE) {
- buf = zfs_realloc(dda->dedup_hdl, buf,
- SPA_MAXBLOCKSIZE, sz);
- }
- (void) ssread(buf, sz, ofp);
- if (ferror(stdin))
- perror("fread");
- }
- if (dump_record(drr, buf, sz, &stream_cksum,
- outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_END:
- {
- struct drr_end *drre = &drr->drr_u.drr_end;
- /* use the recalculated checksum */
- drre->drr_checksum = stream_cksum;
- if (dump_record(drr, NULL, 0, &stream_cksum,
- outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_OBJECT:
- {
- struct drr_object *drro = &drr->drr_u.drr_object;
- if (drro->drr_bonuslen > 0) {
- (void) ssread(buf,
- P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8),
- ofp);
- }
- if (dump_record(drr, buf,
- P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8),
- &stream_cksum, outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_SPILL:
- {
- struct drr_spill *drrs = &drr->drr_u.drr_spill;
- (void) ssread(buf, drrs->drr_length, ofp);
- if (dump_record(drr, buf, drrs->drr_length,
- &stream_cksum, outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_FREEOBJECTS:
- {
- if (dump_record(drr, NULL, 0, &stream_cksum,
- outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_WRITE:
- {
- struct drr_write *drrw = &drr->drr_u.drr_write;
- dataref_t dataref;
- uint64_t payload_size;
-
- payload_size = DRR_WRITE_PAYLOAD_SIZE(drrw);
- (void) ssread(buf, payload_size, ofp);
-
- /*
- * Use the existing checksum if it's dedup-capable,
- * else calculate a SHA256 checksum for it.
- */
-
- if (ZIO_CHECKSUM_EQUAL(drrw->drr_key.ddk_cksum,
- zero_cksum) ||
- !DRR_IS_DEDUP_CAPABLE(drrw->drr_checksumflags)) {
- SHA256_CTX ctx;
- zio_cksum_t tmpsha256;
-
- SHA256Init(&ctx);
- SHA256Update(&ctx, buf, payload_size);
- SHA256Final(&tmpsha256, &ctx);
- drrw->drr_key.ddk_cksum.zc_word[0] =
- BE_64(tmpsha256.zc_word[0]);
- drrw->drr_key.ddk_cksum.zc_word[1] =
- BE_64(tmpsha256.zc_word[1]);
- drrw->drr_key.ddk_cksum.zc_word[2] =
- BE_64(tmpsha256.zc_word[2]);
- drrw->drr_key.ddk_cksum.zc_word[3] =
- BE_64(tmpsha256.zc_word[3]);
- drrw->drr_checksumtype = ZIO_CHECKSUM_SHA256;
- drrw->drr_checksumflags = DRR_CHECKSUM_DEDUP;
- }
-
- dataref.ref_guid = drrw->drr_toguid;
- dataref.ref_object = drrw->drr_object;
- dataref.ref_offset = drrw->drr_offset;
-
- if (ddt_update(dda->dedup_hdl, &ddt,
- &drrw->drr_key.ddk_cksum, drrw->drr_key.ddk_prop,
- &dataref)) {
- dmu_replay_record_t wbr_drr = {0};
- struct drr_write_byref *wbr_drrr =
- &wbr_drr.drr_u.drr_write_byref;
-
- /* block already present in stream */
- wbr_drr.drr_type = DRR_WRITE_BYREF;
-
- wbr_drrr->drr_object = drrw->drr_object;
- wbr_drrr->drr_offset = drrw->drr_offset;
- wbr_drrr->drr_length = drrw->drr_logical_size;
- wbr_drrr->drr_toguid = drrw->drr_toguid;
- wbr_drrr->drr_refguid = dataref.ref_guid;
- wbr_drrr->drr_refobject =
- dataref.ref_object;
- wbr_drrr->drr_refoffset =
- dataref.ref_offset;
-
- wbr_drrr->drr_checksumtype =
- drrw->drr_checksumtype;
- wbr_drrr->drr_checksumflags =
- drrw->drr_checksumtype;
- wbr_drrr->drr_key.ddk_cksum =
- drrw->drr_key.ddk_cksum;
- wbr_drrr->drr_key.ddk_prop =
- drrw->drr_key.ddk_prop;
-
- if (dump_record(&wbr_drr, NULL, 0,
- &stream_cksum, outfd) != 0)
- goto out;
- } else {
- /* block not previously seen */
- if (dump_record(drr, buf, payload_size,
- &stream_cksum, outfd) != 0)
- goto out;
- }
- break;
- }
-
- case DRR_WRITE_EMBEDDED:
- {
- struct drr_write_embedded *drrwe =
- &drr->drr_u.drr_write_embedded;
- (void) ssread(buf,
- P2ROUNDUP((uint64_t)drrwe->drr_psize, 8), ofp);
- if (dump_record(drr, buf,
- P2ROUNDUP((uint64_t)drrwe->drr_psize, 8),
- &stream_cksum, outfd) != 0)
- goto out;
- break;
- }
-
- case DRR_FREE:
- {
- if (dump_record(drr, NULL, 0, &stream_cksum,
- outfd) != 0)
- goto out;
- break;
- }
-
- default:
- (void) fprintf(stderr, "INVALID record type 0x%x\n",
- drr->drr_type);
- /* should never happen, so assert */
- assert(B_FALSE);
- }
- }
-out:
- umem_cache_destroy(ddt.ddecache);
- free(ddt.dedup_hash_array);
- free(buf);
- (void) fclose(ofp);
-
- return (NULL);
-}
-
-/*
- * Routines for dealing with the AVL tree of fs-nvlists
- */
-typedef struct fsavl_node {
- avl_node_t fn_node;
- nvlist_t *fn_nvfs;
- char *fn_snapname;
- uint64_t fn_guid;
-} fsavl_node_t;
-
-static int
-fsavl_compare(const void *arg1, const void *arg2)
-{
- const fsavl_node_t *fn1 = (const fsavl_node_t *)arg1;
- const fsavl_node_t *fn2 = (const fsavl_node_t *)arg2;
-
- return (AVL_CMP(fn1->fn_guid, fn2->fn_guid));
-}
-
-/*
- * Given the GUID of a snapshot, find its containing filesystem and
- * (optionally) name.
- */
-static nvlist_t *
-fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname)
-{
- fsavl_node_t fn_find;
- fsavl_node_t *fn;
-
- fn_find.fn_guid = snapguid;
-
- fn = avl_find(avl, &fn_find, NULL);
- if (fn) {
- if (snapname)
- *snapname = fn->fn_snapname;
- return (fn->fn_nvfs);
- }
- return (NULL);
-}
-
-static void
-fsavl_destroy(avl_tree_t *avl)
-{
- fsavl_node_t *fn;
- void *cookie;
-
- if (avl == NULL)
- return;
-
- cookie = NULL;
- while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL)
- free(fn);
- avl_destroy(avl);
- free(avl);
-}
-
-/*
- * Given an nvlist, produce an avl tree of snapshots, ordered by guid
- */
-static avl_tree_t *
-fsavl_create(nvlist_t *fss)
-{
- avl_tree_t *fsavl;
- nvpair_t *fselem = NULL;
-
- if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL)
- return (NULL);
-
- avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t),
- offsetof(fsavl_node_t, fn_node));
-
- while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) {
- nvlist_t *nvfs, *snaps;
- nvpair_t *snapelem = NULL;
-
- VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
- VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
-
- while ((snapelem =
- nvlist_next_nvpair(snaps, snapelem)) != NULL) {
- fsavl_node_t *fn;
- uint64_t guid;
-
- VERIFY(0 == nvpair_value_uint64(snapelem, &guid));
- if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) {
- fsavl_destroy(fsavl);
- return (NULL);
- }
- fn->fn_nvfs = nvfs;
- fn->fn_snapname = nvpair_name(snapelem);
- fn->fn_guid = guid;
-
- /*
- * Note: if there are multiple snaps with the
- * same GUID, we ignore all but one.
- */
- if (avl_find(fsavl, fn, NULL) == NULL)
- avl_add(fsavl, fn);
- else
- free(fn);
- }
- }
-
- return (fsavl);
-}
-
-/*
- * Routines for dealing with the giant nvlist of fs-nvlists, etc.
- */
-typedef struct send_data {
- /*
- * assigned inside every recursive call,
- * restored from *_save on return:
- *
- * guid of fromsnap snapshot in parent dataset
- * txg of fromsnap snapshot in current dataset
- * txg of tosnap snapshot in current dataset
- */
-
- uint64_t parent_fromsnap_guid;
- uint64_t fromsnap_txg;
- uint64_t tosnap_txg;
-
- /* the nvlists get accumulated during depth-first traversal */
- nvlist_t *parent_snaps;
- nvlist_t *fss;
- nvlist_t *snapprops;
-
- /* send-receive configuration, does not change during traversal */
- const char *fsname;
- const char *fromsnap;
- const char *tosnap;
- boolean_t recursive;
- boolean_t verbose;
- boolean_t replicate;
-
- /*
- * The header nvlist is of the following format:
- * {
- * "tosnap" -> string
- * "fromsnap" -> string (if incremental)
- * "fss" -> {
- * id -> {
- *
- * "name" -> string (full name; for debugging)
- * "parentfromsnap" -> number (guid of fromsnap in parent)
- *
- * "props" -> { name -> value (only if set here) }
- * "snaps" -> { name (lastname) -> number (guid) }
- * "snapprops" -> { name (lastname) -> { name -> value } }
- *
- * "origin" -> number (guid) (if clone)
- * "sent" -> boolean (not on-disk)
- * }
- * }
- * }
- *
- */
-} send_data_t;
-
-static void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv);
-
-static int
-send_iterate_snap(zfs_handle_t *zhp, void *arg)
-{
- send_data_t *sd = arg;
- uint64_t guid = zhp->zfs_dmustats.dds_guid;
- uint64_t txg = zhp->zfs_dmustats.dds_creation_txg;
- char *snapname;
- nvlist_t *nv;
-
- snapname = strrchr(zhp->zfs_name, '@')+1;
-
- if (sd->tosnap_txg != 0 && txg > sd->tosnap_txg) {
- if (sd->verbose) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "skipping snapshot %s because it was created "
- "after the destination snapshot (%s)\n"),
- zhp->zfs_name, sd->tosnap);
- }
- zfs_close(zhp);
- return (0);
- }
-
- VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid));
- /*
- * NB: if there is no fromsnap here (it's a newly created fs in
- * an incremental replication), we will substitute the tosnap.
- */
- if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) ||
- (sd->parent_fromsnap_guid == 0 && sd->tosnap &&
- strcmp(snapname, sd->tosnap) == 0)) {
- sd->parent_fromsnap_guid = guid;
- }
-
- VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0));
- send_iterate_prop(zhp, nv);
- VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv));
- nvlist_free(nv);
-
- zfs_close(zhp);
- return (0);
-}
-
-static void
-send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv)
-{
- nvpair_t *elem = NULL;
-
- while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) {
- char *propname = nvpair_name(elem);
- zfs_prop_t prop = zfs_name_to_prop(propname);
- nvlist_t *propnv;
-
- if (!zfs_prop_user(propname)) {
- /*
- * Realistically, this should never happen. However,
- * we want the ability to add DSL properties without
- * needing to make incompatible version changes. We
- * need to ignore unknown properties to allow older
- * software to still send datasets containing these
- * properties, with the unknown properties elided.
- */
- if (prop == ZPROP_INVAL)
- continue;
-
- if (zfs_prop_readonly(prop))
- continue;
- }
-
- verify(nvpair_value_nvlist(elem, &propnv) == 0);
- if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION ||
- prop == ZFS_PROP_REFQUOTA ||
- prop == ZFS_PROP_REFRESERVATION) {
- char *source;
- uint64_t value;
- verify(nvlist_lookup_uint64(propnv,
- ZPROP_VALUE, &value) == 0);
- if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT)
- continue;
- /*
- * May have no source before SPA_VERSION_RECVD_PROPS,
- * but is still modifiable.
- */
- if (nvlist_lookup_string(propnv,
- ZPROP_SOURCE, &source) == 0) {
- if ((strcmp(source, zhp->zfs_name) != 0) &&
- (strcmp(source,
- ZPROP_SOURCE_VAL_RECVD) != 0))
- continue;
- }
- } else {
- char *source;
- if (nvlist_lookup_string(propnv,
- ZPROP_SOURCE, &source) != 0)
- continue;
- if ((strcmp(source, zhp->zfs_name) != 0) &&
- (strcmp(source, ZPROP_SOURCE_VAL_RECVD) != 0))
- continue;
- }
-
- if (zfs_prop_user(propname) ||
- zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
- char *value;
- verify(nvlist_lookup_string(propnv,
- ZPROP_VALUE, &value) == 0);
- VERIFY(0 == nvlist_add_string(nv, propname, value));
- } else {
- uint64_t value;
- verify(nvlist_lookup_uint64(propnv,
- ZPROP_VALUE, &value) == 0);
- VERIFY(0 == nvlist_add_uint64(nv, propname, value));
- }
- }
-}
-
-/*
- * returns snapshot creation txg
- * and returns 0 if the snapshot does not exist
- */
-static uint64_t
-get_snap_txg(libzfs_handle_t *hdl, const char *fs, const char *snap)
-{
- char name[ZFS_MAX_DATASET_NAME_LEN];
- uint64_t txg = 0;
-
- if (fs == NULL || fs[0] == '\0' || snap == NULL || snap[0] == '\0')
- return (txg);
-
- (void) snprintf(name, sizeof (name), "%s@%s", fs, snap);
- if (zfs_dataset_exists(hdl, name, ZFS_TYPE_SNAPSHOT)) {
- zfs_handle_t *zhp = zfs_open(hdl, name, ZFS_TYPE_SNAPSHOT);
- if (zhp != NULL) {
- txg = zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG);
- zfs_close(zhp);
- }
- }
-
- return (txg);
-}
-
-/*
- * recursively generate nvlists describing datasets. See comment
- * for the data structure send_data_t above for description of contents
- * of the nvlist.
- */
-static int
-send_iterate_fs(zfs_handle_t *zhp, void *arg)
-{
- send_data_t *sd = arg;
- nvlist_t *nvfs, *nv;
- int rv = 0;
- uint64_t min_txg = 0, max_txg = 0;
- uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid;
- uint64_t fromsnap_txg_save = sd->fromsnap_txg;
- uint64_t tosnap_txg_save = sd->tosnap_txg;
- uint64_t txg = zhp->zfs_dmustats.dds_creation_txg;
- uint64_t guid = zhp->zfs_dmustats.dds_guid;
- uint64_t fromsnap_txg, tosnap_txg;
- char guidstring[64];
-
- fromsnap_txg = get_snap_txg(zhp->zfs_hdl, zhp->zfs_name, sd->fromsnap);
- if (fromsnap_txg != 0)
- sd->fromsnap_txg = fromsnap_txg;
-
- tosnap_txg = get_snap_txg(zhp->zfs_hdl, zhp->zfs_name, sd->tosnap);
- if (tosnap_txg != 0)
- sd->tosnap_txg = tosnap_txg;
-
- /*
- * on the send side, if the current dataset does not have tosnap,
- * perform two additional checks:
- *
- * - skip sending the current dataset if it was created later than
- * the parent tosnap
- * - return error if the current dataset was created earlier than
- * the parent tosnap
- */
- if (sd->tosnap != NULL && tosnap_txg == 0) {
- if (sd->tosnap_txg != 0 && txg > sd->tosnap_txg) {
- if (sd->verbose) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "skipping dataset %s: snapshot %s does "
- "not exist\n"), zhp->zfs_name, sd->tosnap);
- }
- } else {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "cannot send %s@%s%s: snapshot %s@%s does not "
- "exist\n"), sd->fsname, sd->tosnap, sd->recursive ?
- dgettext(TEXT_DOMAIN, " recursively") : "",
- zhp->zfs_name, sd->tosnap);
- rv = -1;
- }
- goto out;
- }
-
- nvfs = fnvlist_alloc();
- fnvlist_add_string(nvfs, "name", zhp->zfs_name);
- fnvlist_add_uint64(nvfs, "parentfromsnap",
- sd->parent_fromsnap_guid);
-
- if (zhp->zfs_dmustats.dds_origin[0]) {
- zfs_handle_t *origin = zfs_open(zhp->zfs_hdl,
- zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
- if (origin == NULL) {
- rv = -1;
- goto out;
- }
- VERIFY(0 == nvlist_add_uint64(nvfs, "origin",
- origin->zfs_dmustats.dds_guid));
- }
-
- /* iterate over props */
- VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0));
- send_iterate_prop(zhp, nv);
- VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv));
- nvlist_free(nv);
-
- /* iterate over snaps, and set sd->parent_fromsnap_guid */
- if (!sd->replicate && fromsnap_txg != 0)
- min_txg = fromsnap_txg;
- if (!sd->replicate && tosnap_txg != 0)
- max_txg = tosnap_txg;
- sd->parent_fromsnap_guid = 0;
- VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0));
- VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0));
- (void) zfs_iter_snapshots_sorted(zhp, send_iterate_snap, sd,
- min_txg, max_txg);
- VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps));
- VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops));
- fnvlist_free(sd->parent_snaps);
- fnvlist_free(sd->snapprops);
-
- /* add this fs to nvlist */
- (void) snprintf(guidstring, sizeof (guidstring),
- "0x%llx", (longlong_t)guid);
- VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs));
- nvlist_free(nvfs);
-
- /* iterate over children */
- if (sd->recursive)
- rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd);
-
-out:
- sd->parent_fromsnap_guid = parent_fromsnap_guid_save;
- sd->fromsnap_txg = fromsnap_txg_save;
- sd->tosnap_txg = tosnap_txg_save;
-
- zfs_close(zhp);
- return (rv);
-}
-
-static int
-gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap,
- const char *tosnap, boolean_t recursive, boolean_t verbose,
- boolean_t replicate, nvlist_t **nvlp, avl_tree_t **avlp)
-{
- zfs_handle_t *zhp;
- int error;
- uint64_t min_txg = 0, max_txg = 0;
- send_data_t sd = { 0 };
-
- zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
- if (zhp == NULL)
- return (EZFS_BADTYPE);
-
- VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0));
- sd.fsname = fsname;
- sd.fromsnap = fromsnap;
- sd.tosnap = tosnap;
- sd.recursive = recursive;
- sd.verbose = verbose;
- sd.replicate = replicate;
-
- if ((error = send_iterate_fs(zhp, &sd)) != 0) {
- nvlist_free(sd.fss);
- if (avlp != NULL)
- *avlp = NULL;
- *nvlp = NULL;
- return (error);
- }
-
- if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) {
- nvlist_free(sd.fss);
- *nvlp = NULL;
- return (EZFS_NOMEM);
- }
-
- *nvlp = sd.fss;
- return (0);
-}
-
-/*
- * Routines specific to "zfs send"
- */
-typedef struct send_dump_data {
- /* these are all just the short snapname (the part after the @) */
- const char *fromsnap;
- const char *tosnap;
- char prevsnap[ZFS_MAX_DATASET_NAME_LEN];
- uint64_t prevsnap_obj;
- boolean_t seenfrom, seento, replicate, doall, fromorigin;
- boolean_t verbose, dryrun, parsable, progress, embed_data, std_out;
- boolean_t progressastitle;
- boolean_t large_block, compress;
- int outfd;
- boolean_t err;
- nvlist_t *fss;
- nvlist_t *snapholds;
- avl_tree_t *fsavl;
- snapfilter_cb_t *filter_cb;
- void *filter_cb_arg;
- nvlist_t *debugnv;
- char holdtag[ZFS_MAX_DATASET_NAME_LEN];
- int cleanup_fd;
- uint64_t size;
-} send_dump_data_t;
-
-static int
-zfs_send_space(zfs_handle_t *zhp, const char *snapname, const char *from,
- enum lzc_send_flags flags, uint64_t *spacep)
-{
- libzfs_handle_t *hdl = zhp->zfs_hdl;
- int error;
-
- assert(snapname != NULL);
- error = lzc_send_space(snapname, from, flags, spacep);
-
- if (error != 0) {
- char errbuf[1024];
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "warning: cannot estimate space for '%s'"), snapname);
-
- switch (error) {
- case EXDEV:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "not an earlier snapshot from the same fs"));
- return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
-
- case ENOENT:
- if (zfs_dataset_exists(hdl, snapname,
- ZFS_TYPE_SNAPSHOT)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "incremental source (%s) does not exist"),
- snapname);
- }
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
-
- case EDQUOT:
- case EFBIG:
- case EIO:
- case ENOLINK:
- case ENOSPC:
- case ENXIO:
- case EPIPE:
- case ERANGE:
- case EFAULT:
- case EROFS:
- case EINVAL:
- zfs_error_aux(hdl, strerror(error));
- return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
-
- default:
- return (zfs_standard_error(hdl, error, errbuf));
- }
- }
-
- return (0);
-}
-
-/*
- * Dumps a backup of the given snapshot (incremental from fromsnap if it's not
- * NULL) to the file descriptor specified by outfd.
- */
-static int
-dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj,
- boolean_t fromorigin, int outfd, enum lzc_send_flags flags,
- nvlist_t *debugnv)
-{
- zfs_cmd_t zc = { 0 };
- libzfs_handle_t *hdl = zhp->zfs_hdl;
- nvlist_t *thisdbg;
-
- assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
- assert(fromsnap_obj == 0 || !fromorigin);
-
- (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
- zc.zc_cookie = outfd;
- zc.zc_obj = fromorigin;
- zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
- zc.zc_fromobj = fromsnap_obj;
- zc.zc_flags = flags;
-
- VERIFY(0 == nvlist_alloc(&thisdbg, NV_UNIQUE_NAME, 0));
- if (fromsnap && fromsnap[0] != '\0') {
- VERIFY(0 == nvlist_add_string(thisdbg,
- "fromsnap", fromsnap));
- }
-
- if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SEND, &zc) != 0) {
- char errbuf[1024];
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "warning: cannot send '%s'"), zhp->zfs_name);
-
- VERIFY(0 == nvlist_add_uint64(thisdbg, "error", errno));
- if (debugnv) {
- VERIFY(0 == nvlist_add_nvlist(debugnv,
- zhp->zfs_name, thisdbg));
- }
- nvlist_free(thisdbg);
-
- switch (errno) {
- case EXDEV:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "not an earlier snapshot from the same fs"));
- return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
-
- case ENOENT:
- if (zfs_dataset_exists(hdl, zc.zc_name,
- ZFS_TYPE_SNAPSHOT)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "incremental source (@%s) does not exist"),
- zc.zc_value);
- }
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
-
- case EDQUOT:
- case EFBIG:
- case EIO:
- case ENOLINK:
- case ENOSPC:
-#ifdef illumos
- case ENOSTR:
-#endif
- case ENXIO:
- case EPIPE:
- case ERANGE:
- case EFAULT:
- case EROFS:
- zfs_error_aux(hdl, strerror(errno));
- return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
-
- default:
- return (zfs_standard_error(hdl, errno, errbuf));
- }
- }
-
- if (debugnv)
- VERIFY(0 == nvlist_add_nvlist(debugnv, zhp->zfs_name, thisdbg));
- nvlist_free(thisdbg);
-
- return (0);
-}
-
-static void
-gather_holds(zfs_handle_t *zhp, send_dump_data_t *sdd)
-{
- assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
-
- /*
- * zfs_send() only sets snapholds for sends that need them,
- * e.g. replication and doall.
- */
- if (sdd->snapholds == NULL)
- return;
-
- fnvlist_add_string(sdd->snapholds, zhp->zfs_name, sdd->holdtag);
-}
-
-static void *
-send_progress_thread(void *arg)
-{
- progress_arg_t *pa = arg;
- zfs_cmd_t zc = { 0 };
- zfs_handle_t *zhp = pa->pa_zhp;
- libzfs_handle_t *hdl = zhp->zfs_hdl;
- unsigned long long bytes, total;
- char buf[16];
- time_t t;
- struct tm *tm;
-
- (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
-
- if (!pa->pa_parsable && !pa->pa_astitle)
- (void) fprintf(stderr, "TIME SENT SNAPSHOT\n");
-
- /*
- * Print the progress from ZFS_IOC_SEND_PROGRESS every second.
- */
- for (;;) {
- (void) sleep(1);
-
- zc.zc_cookie = pa->pa_fd;
- if (zfs_ioctl(hdl, ZFS_IOC_SEND_PROGRESS, &zc) != 0)
- return ((void *)-1);
-
- (void) time(&t);
- tm = localtime(&t);
- bytes = zc.zc_cookie;
-
- if (pa->pa_astitle) {
- int pct;
- if (pa->pa_size > bytes)
- pct = 100 * bytes / pa->pa_size;
- else
- pct = 100;
-
- setproctitle("sending %s (%d%%: %llu/%llu)",
- zhp->zfs_name, pct, bytes, pa->pa_size);
- } else if (pa->pa_parsable) {
- (void) fprintf(stderr, "%02d:%02d:%02d\t%llu\t%s\n",
- tm->tm_hour, tm->tm_min, tm->tm_sec,
- bytes, zhp->zfs_name);
- } else {
- zfs_nicenum(bytes, buf, sizeof (buf));
- (void) fprintf(stderr, "%02d:%02d:%02d %5s %s\n",
- tm->tm_hour, tm->tm_min, tm->tm_sec,
- buf, zhp->zfs_name);
- }
- }
-}
-
-static void
-send_print_verbose(FILE *fout, const char *tosnap, const char *fromsnap,
- uint64_t size, boolean_t parsable)
-{
- if (parsable) {
- if (fromsnap != NULL) {
- (void) fprintf(fout, "incremental\t%s\t%s",
- fromsnap, tosnap);
- } else {
- (void) fprintf(fout, "full\t%s",
- tosnap);
- }
- } else {
- if (fromsnap != NULL) {
- if (strchr(fromsnap, '@') == NULL &&
- strchr(fromsnap, '#') == NULL) {
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "send from @%s to %s"),
- fromsnap, tosnap);
- } else {
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "send from %s to %s"),
- fromsnap, tosnap);
- }
- } else {
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "full send of %s"),
- tosnap);
- }
- }
-
- if (parsable) {
- (void) fprintf(fout, "\t%llu",
- (longlong_t)size);
- } else if (size != 0) {
- char buf[16];
- zfs_nicenum(size, buf, sizeof (buf));
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- " estimated size is %s"), buf);
- }
- (void) fprintf(fout, "\n");
-}
-
-static int
-dump_snapshot(zfs_handle_t *zhp, void *arg)
-{
- send_dump_data_t *sdd = arg;
- progress_arg_t pa = { 0 };
- pthread_t tid;
- char *thissnap;
- enum lzc_send_flags flags = 0;
- int err;
- boolean_t isfromsnap, istosnap, fromorigin;
- boolean_t exclude = B_FALSE;
- FILE *fout = sdd->std_out ? stdout : stderr;
-
- err = 0;
- thissnap = strchr(zhp->zfs_name, '@') + 1;
- isfromsnap = (sdd->fromsnap != NULL &&
- strcmp(sdd->fromsnap, thissnap) == 0);
-
- if (!sdd->seenfrom && isfromsnap) {
- gather_holds(zhp, sdd);
- sdd->seenfrom = B_TRUE;
- (void) strcpy(sdd->prevsnap, thissnap);
- sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
- zfs_close(zhp);
- return (0);
- }
-
- if (sdd->seento || !sdd->seenfrom) {
- zfs_close(zhp);
- return (0);
- }
-
- istosnap = (strcmp(sdd->tosnap, thissnap) == 0);
- if (istosnap)
- sdd->seento = B_TRUE;
-
- if (sdd->large_block)
- flags |= LZC_SEND_FLAG_LARGE_BLOCK;
- if (sdd->embed_data)
- flags |= LZC_SEND_FLAG_EMBED_DATA;
- if (sdd->compress)
- flags |= LZC_SEND_FLAG_COMPRESS;
-
- if (!sdd->doall && !isfromsnap && !istosnap) {
- if (sdd->replicate) {
- char *snapname;
- nvlist_t *snapprops;
- /*
- * Filter out all intermediate snapshots except origin
- * snapshots needed to replicate clones.
- */
- nvlist_t *nvfs = fsavl_find(sdd->fsavl,
- zhp->zfs_dmustats.dds_guid, &snapname);
-
- VERIFY(0 == nvlist_lookup_nvlist(nvfs,
- "snapprops", &snapprops));
- VERIFY(0 == nvlist_lookup_nvlist(snapprops,
- thissnap, &snapprops));
- exclude = !nvlist_exists(snapprops, "is_clone_origin");
- } else {
- exclude = B_TRUE;
- }
- }
-
- /*
- * If a filter function exists, call it to determine whether
- * this snapshot will be sent.
- */
- if (exclude || (sdd->filter_cb != NULL &&
- sdd->filter_cb(zhp, sdd->filter_cb_arg) == B_FALSE)) {
- /*
- * This snapshot is filtered out. Don't send it, and don't
- * set prevsnap_obj, so it will be as if this snapshot didn't
- * exist, and the next accepted snapshot will be sent as
- * an incremental from the last accepted one, or as the
- * first (and full) snapshot in the case of a replication,
- * non-incremental send.
- */
- zfs_close(zhp);
- return (0);
- }
-
- gather_holds(zhp, sdd);
- fromorigin = sdd->prevsnap[0] == '\0' &&
- (sdd->fromorigin || sdd->replicate);
-
- if (sdd->verbose || sdd->progress) {
- uint64_t size = 0;
- char fromds[ZFS_MAX_DATASET_NAME_LEN];
-
- if (sdd->prevsnap[0] != '\0') {
- (void) strlcpy(fromds, zhp->zfs_name, sizeof (fromds));
- *(strchr(fromds, '@') + 1) = '\0';
- (void) strlcat(fromds, sdd->prevsnap, sizeof (fromds));
- }
- if (zfs_send_space(zhp, zhp->zfs_name,
- sdd->prevsnap[0] ? fromds : NULL, flags, &size) != 0) {
- size = 0; /* cannot estimate send space */
- } else {
- send_print_verbose(fout, zhp->zfs_name,
- sdd->prevsnap[0] ? sdd->prevsnap : NULL,
- size, sdd->parsable);
- }
- sdd->size += size;
- }
-
- if (!sdd->dryrun) {
- /*
- * If progress reporting is requested, spawn a new thread to
- * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
- */
- if (sdd->progress) {
- pa.pa_zhp = zhp;
- pa.pa_fd = sdd->outfd;
- pa.pa_parsable = sdd->parsable;
- pa.pa_size = sdd->size;
- pa.pa_astitle = sdd->progressastitle;
-
- if ((err = pthread_create(&tid, NULL,
- send_progress_thread, &pa)) != 0) {
- zfs_close(zhp);
- return (err);
- }
- }
-
- err = dump_ioctl(zhp, sdd->prevsnap, sdd->prevsnap_obj,
- fromorigin, sdd->outfd, flags, sdd->debugnv);
-
- if (sdd->progress) {
- (void) pthread_cancel(tid);
- (void) pthread_join(tid, NULL);
- }
- }
-
- (void) strcpy(sdd->prevsnap, thissnap);
- sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
- zfs_close(zhp);
- return (err);
-}
-
-static int
-dump_filesystem(zfs_handle_t *zhp, void *arg)
-{
- int rv = 0;
- uint64_t min_txg = 0, max_txg = 0;
- send_dump_data_t *sdd = arg;
- boolean_t missingfrom = B_FALSE;
- zfs_cmd_t zc = { 0 };
-
- (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
- zhp->zfs_name, sdd->tosnap);
- if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "WARNING: could not send %s@%s: does not exist\n"),
- zhp->zfs_name, sdd->tosnap);
- sdd->err = B_TRUE;
- return (0);
- }
-
- if (sdd->replicate && sdd->fromsnap) {
- /*
- * If this fs does not have fromsnap, and we're doing
- * recursive, we need to send a full stream from the
- * beginning (or an incremental from the origin if this
- * is a clone). If we're doing non-recursive, then let
- * them get the error.
- */
- (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
- zhp->zfs_name, sdd->fromsnap);
- if (ioctl(zhp->zfs_hdl->libzfs_fd,
- ZFS_IOC_OBJSET_STATS, &zc) != 0) {
- missingfrom = B_TRUE;
- }
- }
-
- sdd->seenfrom = sdd->seento = sdd->prevsnap[0] = 0;
- sdd->prevsnap_obj = 0;
- if (sdd->fromsnap == NULL || missingfrom)
- sdd->seenfrom = B_TRUE;
-
- if (!sdd->replicate && sdd->fromsnap != NULL)
- min_txg = get_snap_txg(zhp->zfs_hdl, zhp->zfs_name,
- sdd->fromsnap);
- if (!sdd->replicate && sdd->tosnap != NULL)
- max_txg = get_snap_txg(zhp->zfs_hdl, zhp->zfs_name,
- sdd->tosnap);
-
- rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg,
- min_txg, max_txg);
- if (!sdd->seenfrom) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "WARNING: could not send %s@%s:\n"
- "incremental source (%s@%s) does not exist\n"),
- zhp->zfs_name, sdd->tosnap,
- zhp->zfs_name, sdd->fromsnap);
- sdd->err = B_TRUE;
- } else if (!sdd->seento) {
- if (sdd->fromsnap) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "WARNING: could not send %s@%s:\n"
- "incremental source (%s@%s) "
- "is not earlier than it\n"),
- zhp->zfs_name, sdd->tosnap,
- zhp->zfs_name, sdd->fromsnap);
- } else {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "WARNING: "
- "could not send %s@%s: does not exist\n"),
- zhp->zfs_name, sdd->tosnap);
- }
- sdd->err = B_TRUE;
- }
-
- return (rv);
-}
-
-static int
-dump_filesystems(zfs_handle_t *rzhp, void *arg)
-{
- send_dump_data_t *sdd = arg;
- nvpair_t *fspair;
- boolean_t needagain, progress;
-
- if (!sdd->replicate)
- return (dump_filesystem(rzhp, sdd));
-
- /* Mark the clone origin snapshots. */
- for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
- fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
- nvlist_t *nvfs;
- uint64_t origin_guid = 0;
-
- VERIFY(0 == nvpair_value_nvlist(fspair, &nvfs));
- (void) nvlist_lookup_uint64(nvfs, "origin", &origin_guid);
- if (origin_guid != 0) {
- char *snapname;
- nvlist_t *origin_nv = fsavl_find(sdd->fsavl,
- origin_guid, &snapname);
- if (origin_nv != NULL) {
- nvlist_t *snapprops;
- VERIFY(0 == nvlist_lookup_nvlist(origin_nv,
- "snapprops", &snapprops));
- VERIFY(0 == nvlist_lookup_nvlist(snapprops,
- snapname, &snapprops));
- VERIFY(0 == nvlist_add_boolean(
- snapprops, "is_clone_origin"));
- }
- }
- }
-again:
- needagain = progress = B_FALSE;
- for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
- fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
- nvlist_t *fslist, *parent_nv;
- char *fsname;
- zfs_handle_t *zhp;
- int err;
- uint64_t origin_guid = 0;
- uint64_t parent_guid = 0;
-
- VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0);
- if (nvlist_lookup_boolean(fslist, "sent") == 0)
- continue;
-
- VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0);
- (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid);
- (void) nvlist_lookup_uint64(fslist, "parentfromsnap",
- &parent_guid);
-
- if (parent_guid != 0) {
- parent_nv = fsavl_find(sdd->fsavl, parent_guid, NULL);
- if (!nvlist_exists(parent_nv, "sent")) {
- /* parent has not been sent; skip this one */
- needagain = B_TRUE;
- continue;
- }
- }
-
- if (origin_guid != 0) {
- nvlist_t *origin_nv = fsavl_find(sdd->fsavl,
- origin_guid, NULL);
- if (origin_nv != NULL &&
- !nvlist_exists(origin_nv, "sent")) {
- /*
- * origin has not been sent yet;
- * skip this clone.
- */
- needagain = B_TRUE;
- continue;
- }
- }
-
- zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET);
- if (zhp == NULL)
- return (-1);
- err = dump_filesystem(zhp, sdd);
- VERIFY(nvlist_add_boolean(fslist, "sent") == 0);
- progress = B_TRUE;
- zfs_close(zhp);
- if (err)
- return (err);
- }
- if (needagain) {
- assert(progress);
- goto again;
- }
-
- /* clean out the sent flags in case we reuse this fss */
- for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
- fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
- nvlist_t *fslist;
-
- VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0);
- (void) nvlist_remove_all(fslist, "sent");
- }
-
- return (0);
-}
-
-nvlist_t *
-zfs_send_resume_token_to_nvlist(libzfs_handle_t *hdl, const char *token)
-{
- unsigned int version;
- int nread;
- unsigned long long checksum, packed_len;
-
- /*
- * Decode token header, which is:
- * <token version>-<checksum of payload>-<uncompressed payload length>
- * Note that the only supported token version is 1.
- */
- nread = sscanf(token, "%u-%llx-%llx-",
- &version, &checksum, &packed_len);
- if (nread != 3) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt (invalid format)"));
- return (NULL);
- }
-
- if (version != ZFS_SEND_RESUME_TOKEN_VERSION) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt (invalid version %u)"),
- version);
- return (NULL);
- }
-
- /* convert hexadecimal representation to binary */
- token = strrchr(token, '-') + 1;
- int len = strlen(token) / 2;
- unsigned char *compressed = zfs_alloc(hdl, len);
- for (int i = 0; i < len; i++) {
- nread = sscanf(token + i * 2, "%2hhx", compressed + i);
- if (nread != 1) {
- free(compressed);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt "
- "(payload is not hex-encoded)"));
- return (NULL);
- }
- }
-
- /* verify checksum */
- zio_cksum_t cksum;
- fletcher_4_native(compressed, len, NULL, &cksum);
- if (cksum.zc_word[0] != checksum) {
- free(compressed);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt (incorrect checksum)"));
- return (NULL);
- }
-
- /* uncompress */
- void *packed = zfs_alloc(hdl, packed_len);
- uLongf packed_len_long = packed_len;
- if (uncompress(packed, &packed_len_long, compressed, len) != Z_OK ||
- packed_len_long != packed_len) {
- free(packed);
- free(compressed);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt (decompression failed)"));
- return (NULL);
- }
-
- /* unpack nvlist */
- nvlist_t *nv;
- int error = nvlist_unpack(packed, packed_len, &nv, KM_SLEEP);
- free(packed);
- free(compressed);
- if (error != 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt (nvlist_unpack failed)"));
- return (NULL);
- }
- return (nv);
-}
-
-int
-zfs_send_resume(libzfs_handle_t *hdl, sendflags_t *flags, int outfd,
- const char *resume_token)
-{
- char errbuf[1024];
- char *toname;
- char *fromname = NULL;
- uint64_t resumeobj, resumeoff, toguid, fromguid, bytes;
- zfs_handle_t *zhp;
- int error = 0;
- char name[ZFS_MAX_DATASET_NAME_LEN];
- enum lzc_send_flags lzc_flags = 0;
- uint64_t size = 0;
- FILE *fout = (flags->verbose && flags->dryrun) ? stdout : stderr;
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot resume send"));
-
- nvlist_t *resume_nvl =
- zfs_send_resume_token_to_nvlist(hdl, resume_token);
- if (resume_nvl == NULL) {
- /*
- * zfs_error_aux has already been set by
- * zfs_send_resume_token_to_nvlist
- */
- return (zfs_error(hdl, EZFS_FAULT, errbuf));
- }
- if (flags->verbose) {
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "resume token contents:\n"));
- nvlist_print(fout, resume_nvl);
- }
-
- if (nvlist_lookup_string(resume_nvl, "toname", &toname) != 0 ||
- nvlist_lookup_uint64(resume_nvl, "object", &resumeobj) != 0 ||
- nvlist_lookup_uint64(resume_nvl, "offset", &resumeoff) != 0 ||
- nvlist_lookup_uint64(resume_nvl, "bytes", &bytes) != 0 ||
- nvlist_lookup_uint64(resume_nvl, "toguid", &toguid) != 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "resume token is corrupt"));
- return (zfs_error(hdl, EZFS_FAULT, errbuf));
- }
- fromguid = 0;
- (void) nvlist_lookup_uint64(resume_nvl, "fromguid", &fromguid);
-
- if (flags->largeblock || nvlist_exists(resume_nvl, "largeblockok"))
- lzc_flags |= LZC_SEND_FLAG_LARGE_BLOCK;
- if (flags->embed_data || nvlist_exists(resume_nvl, "embedok"))
- lzc_flags |= LZC_SEND_FLAG_EMBED_DATA;
- if (flags->compress || nvlist_exists(resume_nvl, "compressok"))
- lzc_flags |= LZC_SEND_FLAG_COMPRESS;
-
- if (guid_to_name(hdl, toname, toguid, B_FALSE, name) != 0) {
- if (zfs_dataset_exists(hdl, toname, ZFS_TYPE_DATASET)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "'%s' is no longer the same snapshot used in "
- "the initial send"), toname);
- } else {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "'%s' used in the initial send no longer exists"),
- toname);
- }
- return (zfs_error(hdl, EZFS_BADPATH, errbuf));
- }
- zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET);
- if (zhp == NULL) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "unable to access '%s'"), name);
- return (zfs_error(hdl, EZFS_BADPATH, errbuf));
- }
-
- if (fromguid != 0) {
- if (guid_to_name(hdl, toname, fromguid, B_TRUE, name) != 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "incremental source %#llx no longer exists"),
- (longlong_t)fromguid);
- return (zfs_error(hdl, EZFS_BADPATH, errbuf));
- }
- fromname = name;
- }
-
- if (flags->progress || flags->verbose) {
- error = lzc_send_space(zhp->zfs_name, fromname,
- lzc_flags, &size);
- if (error == 0)
- size = MAX(0, (int64_t)(size - bytes));
- }
- if (flags->verbose) {
- send_print_verbose(fout, zhp->zfs_name, fromname,
- size, flags->parsable);
- }
-
- if (!flags->dryrun) {
- progress_arg_t pa = { 0 };
- pthread_t tid;
- /*
- * If progress reporting is requested, spawn a new thread to
- * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
- */
- if (flags->progress) {
- pa.pa_zhp = zhp;
- pa.pa_fd = outfd;
- pa.pa_parsable = flags->parsable;
- pa.pa_size = size;
- pa.pa_astitle = flags->progressastitle;
-
- error = pthread_create(&tid, NULL,
- send_progress_thread, &pa);
- if (error != 0) {
- zfs_close(zhp);
- return (error);
- }
- }
-
- error = lzc_send_resume(zhp->zfs_name, fromname, outfd,
- lzc_flags, resumeobj, resumeoff);
-
- if (flags->progress) {
- (void) pthread_cancel(tid);
- (void) pthread_join(tid, NULL);
- }
-
- char errbuf[1024];
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "warning: cannot send '%s'"), zhp->zfs_name);
-
- zfs_close(zhp);
-
- switch (error) {
- case 0:
- return (0);
- case EXDEV:
- case ENOENT:
- case EDQUOT:
- case EFBIG:
- case EIO:
- case ENOLINK:
- case ENOSPC:
-#ifdef illumos
- case ENOSTR:
-#endif
- case ENXIO:
- case EPIPE:
- case ERANGE:
- case EFAULT:
- case EROFS:
- zfs_error_aux(hdl, strerror(errno));
- return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
-
- default:
- return (zfs_standard_error(hdl, errno, errbuf));
- }
- }
-
-
- zfs_close(zhp);
-
- return (error);
-}
-
-/*
- * Generate a send stream for the dataset identified by the argument zhp.
- *
- * The content of the send stream is the snapshot identified by
- * 'tosnap'. Incremental streams are requested in two ways:
- * - from the snapshot identified by "fromsnap" (if non-null) or
- * - from the origin of the dataset identified by zhp, which must
- * be a clone. In this case, "fromsnap" is null and "fromorigin"
- * is TRUE.
- *
- * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and
- * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM)
- * if "replicate" is set. If "doall" is set, dump all the intermediate
- * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall"
- * case too. If "props" is set, send properties.
- */
-int
-zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
- sendflags_t *flags, int outfd, snapfilter_cb_t filter_func,
- void *cb_arg, nvlist_t **debugnvp)
-{
- char errbuf[1024];
- send_dump_data_t sdd = { 0 };
- int err = 0;
- nvlist_t *fss = NULL;
- avl_tree_t *fsavl = NULL;
- static uint64_t holdseq;
- int spa_version;
- pthread_t tid = 0;
- int pipefd[2];
- dedup_arg_t dda = { 0 };
- int featureflags = 0;
- FILE *fout;
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot send '%s'"), zhp->zfs_name);
-
- if (fromsnap && fromsnap[0] == '\0') {
- zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
- "zero-length incremental source"));
- return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
- }
-
- if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM) {
- uint64_t version;
- version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
- if (version >= ZPL_VERSION_SA) {
- featureflags |= DMU_BACKUP_FEATURE_SA_SPILL;
- }
- }
-
- if (flags->dedup && !flags->dryrun) {
- featureflags |= (DMU_BACKUP_FEATURE_DEDUP |
- DMU_BACKUP_FEATURE_DEDUPPROPS);
- if ((err = pipe(pipefd)) != 0) {
- zfs_error_aux(zhp->zfs_hdl, strerror(errno));
- return (zfs_error(zhp->zfs_hdl, EZFS_PIPEFAILED,
- errbuf));
- }
- dda.outputfd = outfd;
- dda.inputfd = pipefd[1];
- dda.dedup_hdl = zhp->zfs_hdl;
- if ((err = pthread_create(&tid, NULL, cksummer, &dda)) != 0) {
- (void) close(pipefd[0]);
- (void) close(pipefd[1]);
- zfs_error_aux(zhp->zfs_hdl, strerror(errno));
- return (zfs_error(zhp->zfs_hdl,
- EZFS_THREADCREATEFAILED, errbuf));
- }
- }
-
- if (flags->replicate || flags->doall || flags->props) {
- dmu_replay_record_t drr = { 0 };
- char *packbuf = NULL;
- size_t buflen = 0;
- zio_cksum_t zc = { 0 };
-
- if (flags->replicate || flags->props) {
- nvlist_t *hdrnv;
-
- VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0));
- if (fromsnap) {
- VERIFY(0 == nvlist_add_string(hdrnv,
- "fromsnap", fromsnap));
- }
- VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap));
- if (!flags->replicate) {
- VERIFY(0 == nvlist_add_boolean(hdrnv,
- "not_recursive"));
- }
-
- err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name,
- fromsnap, tosnap, flags->replicate, flags->verbose,
- flags->replicate, &fss, &fsavl);
- if (err)
- goto err_out;
- VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss));
- err = nvlist_pack(hdrnv, &packbuf, &buflen,
- NV_ENCODE_XDR, 0);
- if (debugnvp)
- *debugnvp = hdrnv;
- else
- nvlist_free(hdrnv);
- if (err)
- goto stderr_out;
- }
-
- if (!flags->dryrun) {
- /* write first begin record */
- drr.drr_type = DRR_BEGIN;
- drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
- DMU_SET_STREAM_HDRTYPE(drr.drr_u.drr_begin.
- drr_versioninfo, DMU_COMPOUNDSTREAM);
- DMU_SET_FEATUREFLAGS(drr.drr_u.drr_begin.
- drr_versioninfo, featureflags);
- (void) snprintf(drr.drr_u.drr_begin.drr_toname,
- sizeof (drr.drr_u.drr_begin.drr_toname),
- "%s@%s", zhp->zfs_name, tosnap);
- drr.drr_payloadlen = buflen;
-
- err = dump_record(&drr, packbuf, buflen, &zc, outfd);
- free(packbuf);
- if (err != 0)
- goto stderr_out;
-
- /* write end record */
- bzero(&drr, sizeof (drr));
- drr.drr_type = DRR_END;
- drr.drr_u.drr_end.drr_checksum = zc;
- err = write(outfd, &drr, sizeof (drr));
- if (err == -1) {
- err = errno;
- goto stderr_out;
- }
-
- err = 0;
- }
- }
-
- /* dump each stream */
- sdd.fromsnap = fromsnap;
- sdd.tosnap = tosnap;
- if (tid != 0)
- sdd.outfd = pipefd[0];
- else
- sdd.outfd = outfd;
- sdd.replicate = flags->replicate;
- sdd.doall = flags->doall;
- sdd.fromorigin = flags->fromorigin;
- sdd.fss = fss;
- sdd.fsavl = fsavl;
- sdd.verbose = flags->verbose;
- sdd.parsable = flags->parsable;
- sdd.progress = flags->progress;
- sdd.progressastitle = flags->progressastitle;
- sdd.dryrun = flags->dryrun;
- sdd.large_block = flags->largeblock;
- sdd.embed_data = flags->embed_data;
- sdd.compress = flags->compress;
- sdd.filter_cb = filter_func;
- sdd.filter_cb_arg = cb_arg;
- if (debugnvp)
- sdd.debugnv = *debugnvp;
- if (sdd.verbose && sdd.dryrun)
- sdd.std_out = B_TRUE;
- fout = sdd.std_out ? stdout : stderr;
-
- /*
- * Some flags require that we place user holds on the datasets that are
- * being sent so they don't get destroyed during the send. We can skip
- * this step if the pool is imported read-only since the datasets cannot
- * be destroyed.
- */
- if (!flags->dryrun && !zpool_get_prop_int(zfs_get_pool_handle(zhp),
- ZPOOL_PROP_READONLY, NULL) &&
- zfs_spa_version(zhp, &spa_version) == 0 &&
- spa_version >= SPA_VERSION_USERREFS &&
- (flags->doall || flags->replicate)) {
- ++holdseq;
- (void) snprintf(sdd.holdtag, sizeof (sdd.holdtag),
- ".send-%d-%llu", getpid(), (u_longlong_t)holdseq);
- sdd.cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL);
- if (sdd.cleanup_fd < 0) {
- err = errno;
- goto stderr_out;
- }
- sdd.snapholds = fnvlist_alloc();
- } else {
- sdd.cleanup_fd = -1;
- sdd.snapholds = NULL;
- }
- if (flags->progress || flags->verbose || sdd.snapholds != NULL) {
- /*
- * Do a verbose no-op dry run to get all the verbose output
- * or to gather snapshot hold's before generating any data,
- * then do a non-verbose real run to generate the streams.
- */
- sdd.dryrun = B_TRUE;
- err = dump_filesystems(zhp, &sdd);
-
- if (err != 0)
- goto stderr_out;
-
- if (flags->verbose) {
- if (flags->parsable) {
- (void) fprintf(fout, "size\t%llu\n",
- (longlong_t)sdd.size);
- } else {
- char buf[16];
- zfs_nicenum(sdd.size, buf, sizeof (buf));
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "total estimated size is %s\n"), buf);
- }
- }
-
- /* Ensure no snaps found is treated as an error. */
- if (!sdd.seento) {
- err = ENOENT;
- goto err_out;
- }
-
- /* Skip the second run if dryrun was requested. */
- if (flags->dryrun)
- goto err_out;
-
- if (sdd.snapholds != NULL) {
- err = zfs_hold_nvl(zhp, sdd.cleanup_fd, sdd.snapholds);
- if (err != 0)
- goto stderr_out;
-
- fnvlist_free(sdd.snapholds);
- sdd.snapholds = NULL;
- }
-
- sdd.dryrun = B_FALSE;
- sdd.verbose = B_FALSE;
- }
-
- err = dump_filesystems(zhp, &sdd);
- fsavl_destroy(fsavl);
- nvlist_free(fss);
-
- /* Ensure no snaps found is treated as an error. */
- if (err == 0 && !sdd.seento)
- err = ENOENT;
-
- if (tid != 0) {
- if (err != 0)
- (void) pthread_cancel(tid);
- (void) close(pipefd[0]);
- (void) pthread_join(tid, NULL);
- }
-
- if (sdd.cleanup_fd != -1) {
- VERIFY(0 == close(sdd.cleanup_fd));
- sdd.cleanup_fd = -1;
- }
-
- if (!flags->dryrun && (flags->replicate || flags->doall ||
- flags->props)) {
- /*
- * write final end record. NB: want to do this even if
- * there was some error, because it might not be totally
- * failed.
- */
- dmu_replay_record_t drr = { 0 };
- drr.drr_type = DRR_END;
- if (write(outfd, &drr, sizeof (drr)) == -1) {
- return (zfs_standard_error(zhp->zfs_hdl,
- errno, errbuf));
- }
- }
-
- return (err || sdd.err);
-
-stderr_out:
- err = zfs_standard_error(zhp->zfs_hdl, err, errbuf);
-err_out:
- fsavl_destroy(fsavl);
- nvlist_free(fss);
- fnvlist_free(sdd.snapholds);
-
- if (sdd.cleanup_fd != -1)
- VERIFY(0 == close(sdd.cleanup_fd));
- if (tid != 0) {
- (void) pthread_cancel(tid);
- (void) close(pipefd[0]);
- (void) pthread_join(tid, NULL);
- }
- return (err);
-}
-
-int
-zfs_send_one(zfs_handle_t *zhp, const char *from, int fd, sendflags_t flags)
-{
- int err = 0;
- libzfs_handle_t *hdl = zhp->zfs_hdl;
- enum lzc_send_flags lzc_flags = 0;
- FILE *fout = (flags.verbose && flags.dryrun) ? stdout : stderr;
- char errbuf[1024];
-
- if (flags.largeblock)
- lzc_flags |= LZC_SEND_FLAG_LARGE_BLOCK;
- if (flags.embed_data)
- lzc_flags |= LZC_SEND_FLAG_EMBED_DATA;
- if (flags.compress)
- lzc_flags |= LZC_SEND_FLAG_COMPRESS;
-
- if (flags.verbose) {
- uint64_t size = 0;
- err = lzc_send_space(zhp->zfs_name, from, lzc_flags, &size);
- if (err == 0) {
- send_print_verbose(fout, zhp->zfs_name, from, size,
- flags.parsable);
- if (flags.parsable) {
- (void) fprintf(fout, "size\t%llu\n",
- (longlong_t)size);
- } else {
- char buf[16];
- zfs_nicenum(size, buf, sizeof (buf));
- (void) fprintf(fout, dgettext(TEXT_DOMAIN,
- "total estimated size is %s\n"), buf);
- }
- } else {
- (void) fprintf(stderr, "Cannot estimate send size: "
- "%s\n", strerror(errno));
- }
- }
-
- if (flags.dryrun)
- return (err);
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "warning: cannot send '%s'"), zhp->zfs_name);
-
- err = lzc_send(zhp->zfs_name, from, fd, lzc_flags);
- if (err != 0) {
- switch (errno) {
- case EXDEV:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "not an earlier snapshot from the same fs"));
- return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
-
- case ENOENT:
- case ESRCH:
- if (lzc_exists(zhp->zfs_name)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "incremental source (%s) does not exist"),
- from);
- }
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
-
- case EBUSY:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "target is busy; if a filesystem, "
- "it must not be mounted"));
- return (zfs_error(hdl, EZFS_BUSY, errbuf));
-
- case EDQUOT:
- case EFBIG:
- case EIO:
- case ENOLINK:
- case ENOSPC:
-#ifdef illumos
- case ENOSTR:
-#endif
- case ENXIO:
- case EPIPE:
- case ERANGE:
- case EFAULT:
- case EROFS:
- zfs_error_aux(hdl, strerror(errno));
- return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
-
- default:
- return (zfs_standard_error(hdl, errno, errbuf));
- }
- }
- return (err != 0);
-}
-
-/*
- * Routines specific to "zfs recv"
- */
-
-static int
-recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen,
- boolean_t byteswap, zio_cksum_t *zc)
-{
- char *cp = buf;
- int rv;
- int len = ilen;
-
- assert(ilen <= SPA_MAXBLOCKSIZE);
-
- do {
- rv = read(fd, cp, len);
- cp += rv;
- len -= rv;
- } while (rv > 0);
-
- if (rv < 0 || len != 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "failed to read from stream"));
- return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN,
- "cannot receive")));
- }
-
- if (zc) {
- if (byteswap)
- (void) fletcher_4_incremental_byteswap(buf, ilen, zc);
- else
- (void) fletcher_4_incremental_native(buf, ilen, zc);
- }
- return (0);
-}
-
-static int
-recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp,
- boolean_t byteswap, zio_cksum_t *zc)
-{
- char *buf;
- int err;
-
- buf = zfs_alloc(hdl, len);
- if (buf == NULL)
- return (ENOMEM);
-
- err = recv_read(hdl, fd, buf, len, byteswap, zc);
- if (err != 0) {
- free(buf);
- return (err);
- }
-
- err = nvlist_unpack(buf, len, nvp, 0);
- free(buf);
- if (err != 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
- "stream (malformed nvlist)"));
- return (EINVAL);
- }
- return (0);
-}
-
-static int
-recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname,
- int baselen, char *newname, recvflags_t *flags)
-{
- static int seq;
- int err;
- prop_changelist_t *clp;
- zfs_handle_t *zhp;
-
- zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET);
- if (zhp == NULL)
- return (-1);
- clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
- flags->force ? MS_FORCE : 0);
- zfs_close(zhp);
- if (clp == NULL)
- return (-1);
- err = changelist_prefix(clp);
- if (err)
- return (err);
-
- if (tryname) {
- (void) strcpy(newname, tryname);
- if (flags->verbose) {
- (void) printf("attempting rename %s to %s\n",
- name, newname);
- }
- err = lzc_rename(name, newname);
- if (err == 0)
- changelist_rename(clp, name, tryname);
- } else {
- err = ENOENT;
- }
-
- if (err != 0 && strncmp(name + baselen, "recv-", 5) != 0) {
- seq++;
-
- (void) snprintf(newname, ZFS_MAX_DATASET_NAME_LEN,
- "%.*srecv-%u-%u", baselen, name, getpid(), seq);
- if (flags->verbose) {
- (void) printf("failed - trying rename %s to %s\n",
- name, newname);
- }
- err = lzc_rename(name, newname);
- if (err == 0)
- changelist_rename(clp, name, newname);
- if (err && flags->verbose) {
- (void) printf("failed (%u) - "
- "will try again on next pass\n", errno);
- }
- err = EAGAIN;
- } else if (flags->verbose) {
- if (err == 0)
- (void) printf("success\n");
- else
- (void) printf("failed (%u)\n", errno);
- }
-
- (void) changelist_postfix(clp);
- changelist_free(clp);
-
- return (err);
-}
-
-static int
-recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen,
- char *newname, recvflags_t *flags)
-{
- int err = 0;
- prop_changelist_t *clp;
- zfs_handle_t *zhp;
- boolean_t defer = B_FALSE;
- int spa_version;
-
- zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET);
- if (zhp == NULL)
- return (-1);
- clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
- flags->force ? MS_FORCE : 0);
- if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
- zfs_spa_version(zhp, &spa_version) == 0 &&
- spa_version >= SPA_VERSION_USERREFS)
- defer = B_TRUE;
- zfs_close(zhp);
- if (clp == NULL)
- return (-1);
- err = changelist_prefix(clp);
- if (err)
- return (err);
-
- if (flags->verbose)
- (void) printf("attempting destroy %s\n", name);
- if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
- nvlist_t *nv = fnvlist_alloc();
- fnvlist_add_boolean(nv, name);
- err = lzc_destroy_snaps(nv, defer, NULL);
- fnvlist_free(nv);
- } else {
- err = lzc_destroy(name);
- }
- if (err == 0) {
- if (flags->verbose)
- (void) printf("success\n");
- changelist_remove(clp, name);
- }
-
- (void) changelist_postfix(clp);
- changelist_free(clp);
-
- /*
- * Deferred destroy might destroy the snapshot or only mark it to be
- * destroyed later, and it returns success in either case.
- */
- if (err != 0 || (defer && zfs_dataset_exists(hdl, name,
- ZFS_TYPE_SNAPSHOT))) {
- err = recv_rename(hdl, name, NULL, baselen, newname, flags);
- }
-
- return (err);
-}
-
-typedef struct guid_to_name_data {
- uint64_t guid;
- boolean_t bookmark_ok;
- char *name;
- char *skip;
-} guid_to_name_data_t;
-
-static int
-guid_to_name_cb(zfs_handle_t *zhp, void *arg)
-{
- guid_to_name_data_t *gtnd = arg;
- const char *slash;
- int err;
-
- if (gtnd->skip != NULL &&
- (slash = strrchr(zhp->zfs_name, '/')) != NULL &&
- strcmp(slash + 1, gtnd->skip) == 0) {
- zfs_close(zhp);
- return (0);
- }
-
- if (zfs_prop_get_int(zhp, ZFS_PROP_GUID) == gtnd->guid) {
- (void) strcpy(gtnd->name, zhp->zfs_name);
- zfs_close(zhp);
- return (EEXIST);
- }
-
- err = zfs_iter_children(zhp, guid_to_name_cb, gtnd);
- if (err != EEXIST && gtnd->bookmark_ok)
- err = zfs_iter_bookmarks(zhp, guid_to_name_cb, gtnd);
- zfs_close(zhp);
- return (err);
-}
-
-/*
- * Attempt to find the local dataset associated with this guid. In the case of
- * multiple matches, we attempt to find the "best" match by searching
- * progressively larger portions of the hierarchy. This allows one to send a
- * tree of datasets individually and guarantee that we will find the source
- * guid within that hierarchy, even if there are multiple matches elsewhere.
- */
-static int
-guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid,
- boolean_t bookmark_ok, char *name)
-{
- char pname[ZFS_MAX_DATASET_NAME_LEN];
- guid_to_name_data_t gtnd;
-
- gtnd.guid = guid;
- gtnd.bookmark_ok = bookmark_ok;
- gtnd.name = name;
- gtnd.skip = NULL;
-
- /*
- * Search progressively larger portions of the hierarchy, starting
- * with the filesystem specified by 'parent'. This will
- * select the "most local" version of the origin snapshot in the case
- * that there are multiple matching snapshots in the system.
- */
- (void) strlcpy(pname, parent, sizeof (pname));
- char *cp = strrchr(pname, '@');
- if (cp == NULL)
- cp = strchr(pname, '\0');
- for (; cp != NULL; cp = strrchr(pname, '/')) {
- /* Chop off the last component and open the parent */
- *cp = '\0';
- zfs_handle_t *zhp = make_dataset_handle(hdl, pname);
-
- if (zhp == NULL)
- continue;
- int err = guid_to_name_cb(zfs_handle_dup(zhp), &gtnd);
- if (err != EEXIST)
- err = zfs_iter_children(zhp, guid_to_name_cb, &gtnd);
- if (err != EEXIST && bookmark_ok)
- err = zfs_iter_bookmarks(zhp, guid_to_name_cb, &gtnd);
- zfs_close(zhp);
- if (err == EEXIST)
- return (0);
-
- /*
- * Remember the last portion of the dataset so we skip it next
- * time through (as we've already searched that portion of the
- * hierarchy).
- */
- gtnd.skip = strrchr(pname, '/') + 1;
- }
-
- return (ENOENT);
-}
-
-/*
- * Return +1 if guid1 is before guid2, 0 if they are the same, and -1 if
- * guid1 is after guid2.
- */
-static int
-created_before(libzfs_handle_t *hdl, avl_tree_t *avl,
- uint64_t guid1, uint64_t guid2)
-{
- nvlist_t *nvfs;
- char *fsname, *snapname;
- char buf[ZFS_MAX_DATASET_NAME_LEN];
- int rv;
- zfs_handle_t *guid1hdl, *guid2hdl;
- uint64_t create1, create2;
-
- if (guid2 == 0)
- return (0);
- if (guid1 == 0)
- return (1);
-
- nvfs = fsavl_find(avl, guid1, &snapname);
- VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
- (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
- guid1hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
- if (guid1hdl == NULL)
- return (-1);
-
- nvfs = fsavl_find(avl, guid2, &snapname);
- VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
- (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
- guid2hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
- if (guid2hdl == NULL) {
- zfs_close(guid1hdl);
- return (-1);
- }
-
- create1 = zfs_prop_get_int(guid1hdl, ZFS_PROP_CREATETXG);
- create2 = zfs_prop_get_int(guid2hdl, ZFS_PROP_CREATETXG);
-
- if (create1 < create2)
- rv = -1;
- else if (create1 > create2)
- rv = +1;
- else
- rv = 0;
-
- zfs_close(guid1hdl);
- zfs_close(guid2hdl);
-
- return (rv);
-}
-
-static int
-recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs,
- recvflags_t *flags, nvlist_t *stream_nv, avl_tree_t *stream_avl,
- nvlist_t *renamed)
-{
- nvlist_t *local_nv, *deleted = NULL;
- avl_tree_t *local_avl;
- nvpair_t *fselem, *nextfselem;
- char *fromsnap;
- char newname[ZFS_MAX_DATASET_NAME_LEN];
- char guidname[32];
- int error;
- boolean_t needagain, progress, recursive;
- char *s1, *s2;
-
- VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap));
-
- recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
- ENOENT);
-
- if (flags->dryrun)
- return (0);
-
-again:
- needagain = progress = B_FALSE;
-
- VERIFY(0 == nvlist_alloc(&deleted, NV_UNIQUE_NAME, 0));
-
- if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL,
- recursive, B_FALSE, B_FALSE, &local_nv, &local_avl)) != 0)
- return (error);
-
- /*
- * Process deletes and renames
- */
- for (fselem = nvlist_next_nvpair(local_nv, NULL);
- fselem; fselem = nextfselem) {
- nvlist_t *nvfs, *snaps;
- nvlist_t *stream_nvfs = NULL;
- nvpair_t *snapelem, *nextsnapelem;
- uint64_t fromguid = 0;
- uint64_t originguid = 0;
- uint64_t stream_originguid = 0;
- uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid;
- char *fsname, *stream_fsname;
-
- nextfselem = nvlist_next_nvpair(local_nv, fselem);
-
- VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
- VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
- VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
- VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap",
- &parent_fromsnap_guid));
- (void) nvlist_lookup_uint64(nvfs, "origin", &originguid);
-
- /*
- * First find the stream's fs, so we can check for
- * a different origin (due to "zfs promote")
- */
- for (snapelem = nvlist_next_nvpair(snaps, NULL);
- snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) {
- uint64_t thisguid;
-
- VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
- stream_nvfs = fsavl_find(stream_avl, thisguid, NULL);
-
- if (stream_nvfs != NULL)
- break;
- }
-
- /* check for promote */
- (void) nvlist_lookup_uint64(stream_nvfs, "origin",
- &stream_originguid);
- if (stream_nvfs && originguid != stream_originguid) {
- switch (created_before(hdl, local_avl,
- stream_originguid, originguid)) {
- case 1: {
- /* promote it! */
- zfs_cmd_t zc = { 0 };
- nvlist_t *origin_nvfs;
- char *origin_fsname;
-
- if (flags->verbose)
- (void) printf("promoting %s\n", fsname);
-
- origin_nvfs = fsavl_find(local_avl, originguid,
- NULL);
- VERIFY(0 == nvlist_lookup_string(origin_nvfs,
- "name", &origin_fsname));
- (void) strlcpy(zc.zc_value, origin_fsname,
- sizeof (zc.zc_value));
- (void) strlcpy(zc.zc_name, fsname,
- sizeof (zc.zc_name));
- error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
- if (error == 0)
- progress = B_TRUE;
- break;
- }
- default:
- break;
- case -1:
- fsavl_destroy(local_avl);
- nvlist_free(local_nv);
- return (-1);
- }
- /*
- * We had/have the wrong origin, therefore our
- * list of snapshots is wrong. Need to handle
- * them on the next pass.
- */
- needagain = B_TRUE;
- continue;
- }
-
- for (snapelem = nvlist_next_nvpair(snaps, NULL);
- snapelem; snapelem = nextsnapelem) {
- uint64_t thisguid;
- char *stream_snapname;
- nvlist_t *found, *props;
-
- nextsnapelem = nvlist_next_nvpair(snaps, snapelem);
-
- VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
- found = fsavl_find(stream_avl, thisguid,
- &stream_snapname);
-
- /* check for delete */
- if (found == NULL) {
- char name[ZFS_MAX_DATASET_NAME_LEN];
-
- if (!flags->force)
- continue;
-
- (void) snprintf(name, sizeof (name), "%s@%s",
- fsname, nvpair_name(snapelem));
-
- error = recv_destroy(hdl, name,
- strlen(fsname)+1, newname, flags);
- if (error)
- needagain = B_TRUE;
- else
- progress = B_TRUE;
- sprintf(guidname, "%" PRIu64, thisguid);
- nvlist_add_boolean(deleted, guidname);
- continue;
- }
-
- stream_nvfs = found;
-
- if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops",
- &props) && 0 == nvlist_lookup_nvlist(props,
- stream_snapname, &props)) {
- zfs_cmd_t zc = { 0 };
-
- zc.zc_cookie = B_TRUE; /* received */
- (void) snprintf(zc.zc_name, sizeof (zc.zc_name),
- "%s@%s", fsname, nvpair_name(snapelem));
- if (zcmd_write_src_nvlist(hdl, &zc,
- props) == 0) {
- (void) zfs_ioctl(hdl,
- ZFS_IOC_SET_PROP, &zc);
- zcmd_free_nvlists(&zc);
- }
- }
-
- /* check for different snapname */
- if (strcmp(nvpair_name(snapelem),
- stream_snapname) != 0) {
- char name[ZFS_MAX_DATASET_NAME_LEN];
- char tryname[ZFS_MAX_DATASET_NAME_LEN];
-
- (void) snprintf(name, sizeof (name), "%s@%s",
- fsname, nvpair_name(snapelem));
- (void) snprintf(tryname, sizeof (name), "%s@%s",
- fsname, stream_snapname);
-
- error = recv_rename(hdl, name, tryname,
- strlen(fsname)+1, newname, flags);
- if (error)
- needagain = B_TRUE;
- else
- progress = B_TRUE;
- }
-
- if (strcmp(stream_snapname, fromsnap) == 0)
- fromguid = thisguid;
- }
-
- /* check for delete */
- if (stream_nvfs == NULL) {
- if (!flags->force)
- continue;
-
- error = recv_destroy(hdl, fsname, strlen(tofs)+1,
- newname, flags);
- if (error)
- needagain = B_TRUE;
- else
- progress = B_TRUE;
- sprintf(guidname, "%" PRIu64, parent_fromsnap_guid);
- nvlist_add_boolean(deleted, guidname);
- continue;
- }
-
- if (fromguid == 0) {
- if (flags->verbose) {
- (void) printf("local fs %s does not have "
- "fromsnap (%s in stream); must have "
- "been deleted locally; ignoring\n",
- fsname, fromsnap);
- }
- continue;
- }
-
- VERIFY(0 == nvlist_lookup_string(stream_nvfs,
- "name", &stream_fsname));
- VERIFY(0 == nvlist_lookup_uint64(stream_nvfs,
- "parentfromsnap", &stream_parent_fromsnap_guid));
-
- s1 = strrchr(fsname, '/');
- s2 = strrchr(stream_fsname, '/');
-
- /*
- * Check if we're going to rename based on parent guid change
- * and the current parent guid was also deleted. If it was then
- * rename will fail and is likely unneeded, so avoid this and
- * force an early retry to determine the new
- * parent_fromsnap_guid.
- */
- if (stream_parent_fromsnap_guid != 0 &&
- parent_fromsnap_guid != 0 &&
- stream_parent_fromsnap_guid != parent_fromsnap_guid) {
- sprintf(guidname, "%" PRIu64, parent_fromsnap_guid);
- if (nvlist_exists(deleted, guidname)) {
- progress = B_TRUE;
- needagain = B_TRUE;
- goto doagain;
- }
- }
-
- /*
- * Check for rename. If the exact receive path is specified, it
- * does not count as a rename, but we still need to check the
- * datasets beneath it.
- */
- if ((stream_parent_fromsnap_guid != 0 &&
- parent_fromsnap_guid != 0 &&
- stream_parent_fromsnap_guid != parent_fromsnap_guid) ||
- ((flags->isprefix || strcmp(tofs, fsname) != 0) &&
- (s1 != NULL) && (s2 != NULL) && strcmp(s1, s2) != 0)) {
- nvlist_t *parent;
- char tryname[ZFS_MAX_DATASET_NAME_LEN];
-
- parent = fsavl_find(local_avl,
- stream_parent_fromsnap_guid, NULL);
- /*
- * NB: parent might not be found if we used the
- * tosnap for stream_parent_fromsnap_guid,
- * because the parent is a newly-created fs;
- * we'll be able to rename it after we recv the
- * new fs.
- */
- if (parent != NULL) {
- char *pname;
-
- VERIFY(0 == nvlist_lookup_string(parent, "name",
- &pname));
- (void) snprintf(tryname, sizeof (tryname),
- "%s%s", pname, strrchr(stream_fsname, '/'));
- } else {
- tryname[0] = '\0';
- if (flags->verbose) {
- (void) printf("local fs %s new parent "
- "not found\n", fsname);
- }
- }
-
- newname[0] = '\0';
-
- error = recv_rename(hdl, fsname, tryname,
- strlen(tofs)+1, newname, flags);
-
- if (renamed != NULL && newname[0] != '\0') {
- VERIFY(0 == nvlist_add_boolean(renamed,
- newname));
- }
-
- if (error)
- needagain = B_TRUE;
- else
- progress = B_TRUE;
- }
- }
-
-doagain:
- fsavl_destroy(local_avl);
- nvlist_free(local_nv);
- nvlist_free(deleted);
-
- if (needagain && progress) {
- /* do another pass to fix up temporary names */
- if (flags->verbose)
- (void) printf("another pass:\n");
- goto again;
- }
-
- return (needagain);
-}
-
-static int
-zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname,
- recvflags_t *flags, dmu_replay_record_t *drr, zio_cksum_t *zc,
- char **top_zfs, int cleanup_fd, uint64_t *action_handlep)
-{
- nvlist_t *stream_nv = NULL;
- avl_tree_t *stream_avl = NULL;
- char *fromsnap = NULL;
- char *sendsnap = NULL;
- char *cp;
- char tofs[ZFS_MAX_DATASET_NAME_LEN];
- char sendfs[ZFS_MAX_DATASET_NAME_LEN];
- char errbuf[1024];
- dmu_replay_record_t drre;
- int error;
- boolean_t anyerr = B_FALSE;
- boolean_t softerr = B_FALSE;
- boolean_t recursive;
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot receive"));
-
- assert(drr->drr_type == DRR_BEGIN);
- assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC);
- assert(DMU_GET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo) ==
- DMU_COMPOUNDSTREAM);
-
- /*
- * Read in the nvlist from the stream.
- */
- if (drr->drr_payloadlen != 0) {
- error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen,
- &stream_nv, flags->byteswap, zc);
- if (error) {
- error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- goto out;
- }
- }
-
- recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
- ENOENT);
-
- if (recursive && strchr(destname, '@')) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "cannot specify snapshot name for multi-snapshot stream"));
- error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- goto out;
- }
-
- /*
- * Read in the end record and verify checksum.
- */
- if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre),
- flags->byteswap, NULL)))
- goto out;
- if (flags->byteswap) {
- drre.drr_type = BSWAP_32(drre.drr_type);
- drre.drr_u.drr_end.drr_checksum.zc_word[0] =
- BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]);
- drre.drr_u.drr_end.drr_checksum.zc_word[1] =
- BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]);
- drre.drr_u.drr_end.drr_checksum.zc_word[2] =
- BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]);
- drre.drr_u.drr_end.drr_checksum.zc_word[3] =
- BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]);
- }
- if (drre.drr_type != DRR_END) {
- error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- goto out;
- }
- if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "incorrect header checksum"));
- error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- goto out;
- }
-
- (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap);
-
- if (drr->drr_payloadlen != 0) {
- nvlist_t *stream_fss;
-
- VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss",
- &stream_fss));
- if ((stream_avl = fsavl_create(stream_fss)) == NULL) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "couldn't allocate avl tree"));
- error = zfs_error(hdl, EZFS_NOMEM, errbuf);
- goto out;
- }
-
- if (fromsnap != NULL && recursive) {
- nvlist_t *renamed = NULL;
- nvpair_t *pair = NULL;
-
- (void) strlcpy(tofs, destname, sizeof (tofs));
- if (flags->isprefix) {
- struct drr_begin *drrb = &drr->drr_u.drr_begin;
- int i;
-
- if (flags->istail) {
- cp = strrchr(drrb->drr_toname, '/');
- if (cp == NULL) {
- (void) strlcat(tofs, "/",
- sizeof (tofs));
- i = 0;
- } else {
- i = (cp - drrb->drr_toname);
- }
- } else {
- i = strcspn(drrb->drr_toname, "/@");
- }
- /* zfs_receive_one() will create_parents() */
- (void) strlcat(tofs, &drrb->drr_toname[i],
- sizeof (tofs));
- *strchr(tofs, '@') = '\0';
- }
-
- if (!flags->dryrun && !flags->nomount) {
- VERIFY(0 == nvlist_alloc(&renamed,
- NV_UNIQUE_NAME, 0));
- }
-
- softerr = recv_incremental_replication(hdl, tofs, flags,
- stream_nv, stream_avl, renamed);
-
- /* Unmount renamed filesystems before receiving. */
- while ((pair = nvlist_next_nvpair(renamed,
- pair)) != NULL) {
- zfs_handle_t *zhp;
- prop_changelist_t *clp = NULL;
-
- zhp = zfs_open(hdl, nvpair_name(pair),
- ZFS_TYPE_FILESYSTEM);
- if (zhp != NULL) {
- clp = changelist_gather(zhp,
- ZFS_PROP_MOUNTPOINT, 0,
- flags->forceunmount ? MS_FORCE : 0);
- zfs_close(zhp);
- if (clp != NULL) {
- softerr |=
- changelist_prefix(clp);
- changelist_free(clp);
- }
- }
- }
-
- nvlist_free(renamed);
- }
- }
-
- /*
- * Get the fs specified by the first path in the stream (the top level
- * specified by 'zfs send') and pass it to each invocation of
- * zfs_receive_one().
- */
- (void) strlcpy(sendfs, drr->drr_u.drr_begin.drr_toname,
- sizeof (sendfs));
- if ((cp = strchr(sendfs, '@')) != NULL) {
- *cp = '\0';
- /*
- * Find the "sendsnap", the final snapshot in a replication
- * stream. zfs_receive_one() handles certain errors
- * differently, depending on if the contained stream is the
- * last one or not.
- */
- sendsnap = (cp + 1);
- }
-
- /* Finally, receive each contained stream */
- do {
- /*
- * we should figure out if it has a recoverable
- * error, in which case do a recv_skip() and drive on.
- * Note, if we fail due to already having this guid,
- * zfs_receive_one() will take care of it (ie,
- * recv_skip() and return 0).
- */
- error = zfs_receive_impl(hdl, destname, NULL, flags, fd,
- sendfs, stream_nv, stream_avl, top_zfs, cleanup_fd,
- action_handlep, sendsnap);
- if (error == ENODATA) {
- error = 0;
- break;
- }
- anyerr |= error;
- } while (error == 0);
-
- if (drr->drr_payloadlen != 0 && recursive && fromsnap != NULL) {
- /*
- * Now that we have the fs's they sent us, try the
- * renames again.
- */
- softerr = recv_incremental_replication(hdl, tofs, flags,
- stream_nv, stream_avl, NULL);
- }
-
-out:
- fsavl_destroy(stream_avl);
- nvlist_free(stream_nv);
- if (softerr)
- error = -2;
- if (anyerr)
- error = -1;
- return (error);
-}
-
-static void
-trunc_prop_errs(int truncated)
-{
- ASSERT(truncated != 0);
-
- if (truncated == 1)
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "1 more property could not be set\n"));
- else
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
- "%d more properties could not be set\n"), truncated);
-}
-
-static int
-recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap)
-{
- dmu_replay_record_t *drr;
- void *buf = zfs_alloc(hdl, SPA_MAXBLOCKSIZE);
- char errbuf[1024];
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot receive:"));
-
- /* XXX would be great to use lseek if possible... */
- drr = buf;
-
- while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t),
- byteswap, NULL) == 0) {
- if (byteswap)
- drr->drr_type = BSWAP_32(drr->drr_type);
-
- switch (drr->drr_type) {
- case DRR_BEGIN:
- if (drr->drr_payloadlen != 0) {
- (void) recv_read(hdl, fd, buf,
- drr->drr_payloadlen, B_FALSE, NULL);
- }
- break;
-
- case DRR_END:
- free(buf);
- return (0);
-
- case DRR_OBJECT:
- if (byteswap) {
- drr->drr_u.drr_object.drr_bonuslen =
- BSWAP_32(drr->drr_u.drr_object.
- drr_bonuslen);
- }
- (void) recv_read(hdl, fd, buf,
- P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8),
- B_FALSE, NULL);
- break;
-
- case DRR_WRITE:
- if (byteswap) {
- drr->drr_u.drr_write.drr_logical_size =
- BSWAP_64(
- drr->drr_u.drr_write.drr_logical_size);
- drr->drr_u.drr_write.drr_compressed_size =
- BSWAP_64(
- drr->drr_u.drr_write.drr_compressed_size);
- }
- uint64_t payload_size =
- DRR_WRITE_PAYLOAD_SIZE(&drr->drr_u.drr_write);
- (void) recv_read(hdl, fd, buf,
- payload_size, B_FALSE, NULL);
- break;
- case DRR_SPILL:
- if (byteswap) {
- drr->drr_u.drr_spill.drr_length =
- BSWAP_64(drr->drr_u.drr_spill.drr_length);
- }
- (void) recv_read(hdl, fd, buf,
- drr->drr_u.drr_spill.drr_length, B_FALSE, NULL);
- break;
- case DRR_WRITE_EMBEDDED:
- if (byteswap) {
- drr->drr_u.drr_write_embedded.drr_psize =
- BSWAP_32(drr->drr_u.drr_write_embedded.
- drr_psize);
- }
- (void) recv_read(hdl, fd, buf,
- P2ROUNDUP(drr->drr_u.drr_write_embedded.drr_psize,
- 8), B_FALSE, NULL);
- break;
- case DRR_WRITE_BYREF:
- case DRR_FREEOBJECTS:
- case DRR_FREE:
- break;
-
- default:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "invalid record type"));
- return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
- }
- }
-
- free(buf);
- return (-1);
-}
-
-static void
-recv_ecksum_set_aux(libzfs_handle_t *hdl, const char *target_snap,
- boolean_t resumable)
-{
- char target_fs[ZFS_MAX_DATASET_NAME_LEN];
-
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "checksum mismatch or incomplete stream"));
-
- if (!resumable)
- return;
- (void) strlcpy(target_fs, target_snap, sizeof (target_fs));
- *strchr(target_fs, '@') = '\0';
- zfs_handle_t *zhp = zfs_open(hdl, target_fs,
- ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
- if (zhp == NULL)
- return;
-
- char token_buf[ZFS_MAXPROPLEN];
- int error = zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
- token_buf, sizeof (token_buf),
- NULL, NULL, 0, B_TRUE);
- if (error == 0) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "checksum mismatch or incomplete stream.\n"
- "Partially received snapshot is saved.\n"
- "A resuming stream can be generated on the sending "
- "system by running:\n"
- " zfs send -t %s"),
- token_buf);
- }
- zfs_close(zhp);
-}
-
-/*
- * Restores a backup of tosnap from the file descriptor specified by infd.
- */
-static int
-zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
- const char *originsnap, recvflags_t *flags, dmu_replay_record_t *drr,
- dmu_replay_record_t *drr_noswap, const char *sendfs, nvlist_t *stream_nv,
- avl_tree_t *stream_avl, char **top_zfs, int cleanup_fd,
- uint64_t *action_handlep, const char *finalsnap)
-{
- zfs_cmd_t zc = { 0 };
- time_t begin_time;
- int ioctl_err, ioctl_errno, err;
- char *cp;
- struct drr_begin *drrb = &drr->drr_u.drr_begin;
- char errbuf[1024];
- char prop_errbuf[1024];
- const char *chopprefix;
- boolean_t newfs = B_FALSE;
- boolean_t stream_wantsnewfs;
- uint64_t parent_snapguid = 0;
- prop_changelist_t *clp = NULL;
- nvlist_t *snapprops_nvlist = NULL;
- zprop_errflags_t prop_errflags;
- boolean_t recursive;
- char *snapname = NULL;
-
- begin_time = time(NULL);
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot receive"));
-
- recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
- ENOENT);
-
- if (stream_avl != NULL) {
- nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid,
- &snapname);
- nvlist_t *props;
- int ret;
-
- (void) nvlist_lookup_uint64(fs, "parentfromsnap",
- &parent_snapguid);
- err = nvlist_lookup_nvlist(fs, "props", &props);
- if (err)
- VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0));
-
- if (flags->canmountoff) {
- VERIFY(0 == nvlist_add_uint64(props,
- zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0));
- }
- ret = zcmd_write_src_nvlist(hdl, &zc, props);
- if (err)
- nvlist_free(props);
-
- if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) {
- VERIFY(0 == nvlist_lookup_nvlist(props,
- snapname, &snapprops_nvlist));
- }
-
- if (ret != 0)
- return (-1);
- }
-
- cp = NULL;
-
- /*
- * Determine how much of the snapshot name stored in the stream
- * we are going to tack on to the name they specified on the
- * command line, and how much we are going to chop off.
- *
- * If they specified a snapshot, chop the entire name stored in
- * the stream.
- */
- if (flags->istail) {
- /*
- * A filesystem was specified with -e. We want to tack on only
- * the tail of the sent snapshot path.
- */
- if (strchr(tosnap, '@')) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
- "argument - snapshot not allowed with -e"));
- return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
- }
-
- chopprefix = strrchr(sendfs, '/');
-
- if (chopprefix == NULL) {
- /*
- * The tail is the poolname, so we need to
- * prepend a path separator.
- */
- int len = strlen(drrb->drr_toname);
- cp = malloc(len + 2);
- cp[0] = '/';
- (void) strcpy(&cp[1], drrb->drr_toname);
- chopprefix = cp;
- } else {
- chopprefix = drrb->drr_toname + (chopprefix - sendfs);
- }
- } else if (flags->isprefix) {
- /*
- * A filesystem was specified with -d. We want to tack on
- * everything but the first element of the sent snapshot path
- * (all but the pool name).
- */
- if (strchr(tosnap, '@')) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
- "argument - snapshot not allowed with -d"));
- return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
- }
-
- chopprefix = strchr(drrb->drr_toname, '/');
- if (chopprefix == NULL)
- chopprefix = strchr(drrb->drr_toname, '@');
- } else if (strchr(tosnap, '@') == NULL) {
- /*
- * If a filesystem was specified without -d or -e, we want to
- * tack on everything after the fs specified by 'zfs send'.
- */
- chopprefix = drrb->drr_toname + strlen(sendfs);
- } else {
- /* A snapshot was specified as an exact path (no -d or -e). */
- if (recursive) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "cannot specify snapshot name for multi-snapshot "
- "stream"));
- return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
- }
- chopprefix = drrb->drr_toname + strlen(drrb->drr_toname);
- }
-
- ASSERT(strstr(drrb->drr_toname, sendfs) == drrb->drr_toname);
- ASSERT(chopprefix > drrb->drr_toname);
- ASSERT(chopprefix <= drrb->drr_toname + strlen(drrb->drr_toname));
- ASSERT(chopprefix[0] == '/' || chopprefix[0] == '@' ||
- chopprefix[0] == '\0');
-
- /*
- * Determine name of destination snapshot, store in zc_value.
- */
- (void) strcpy(zc.zc_value, tosnap);
- (void) strncat(zc.zc_value, chopprefix, sizeof (zc.zc_value));
-#ifdef __FreeBSD__
- if (zfs_ioctl_version == ZFS_IOCVER_UNDEF)
- zfs_ioctl_version = get_zfs_ioctl_version();
- /*
- * For forward compatibility hide tosnap in zc_value
- */
- if (zfs_ioctl_version < ZFS_IOCVER_LZC)
- (void) strcpy(zc.zc_value + strlen(zc.zc_value) + 1, tosnap);
-#endif
- free(cp);
- if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) {
- zcmd_free_nvlists(&zc);
- return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
- }
-
- /*
- * Determine the name of the origin snapshot, store in zc_string.
- */
- if (originsnap) {
- (void) strncpy(zc.zc_string, originsnap, sizeof (zc.zc_string));
- if (flags->verbose)
- (void) printf("using provided clone origin %s\n",
- zc.zc_string);
- } else if (drrb->drr_flags & DRR_FLAG_CLONE) {
- if (guid_to_name(hdl, zc.zc_value,
- drrb->drr_fromguid, B_FALSE, zc.zc_string) != 0) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "local origin for clone %s does not exist"),
- zc.zc_value);
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
- }
- if (flags->verbose)
- (void) printf("found clone origin %s\n", zc.zc_string);
- }
-
- boolean_t resuming = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
- DMU_BACKUP_FEATURE_RESUMING;
- stream_wantsnewfs = (drrb->drr_fromguid == 0 ||
- (drrb->drr_flags & DRR_FLAG_CLONE) || originsnap) && !resuming;
-
- if (stream_wantsnewfs) {
- /*
- * if the parent fs does not exist, look for it based on
- * the parent snap GUID
- */
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot receive new filesystem stream"));
-
- (void) strcpy(zc.zc_name, zc.zc_value);
- cp = strrchr(zc.zc_name, '/');
- if (cp)
- *cp = '\0';
- if (cp &&
- !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
- char suffix[ZFS_MAX_DATASET_NAME_LEN];
- (void) strcpy(suffix, strrchr(zc.zc_value, '/'));
- if (guid_to_name(hdl, zc.zc_name, parent_snapguid,
- B_FALSE, zc.zc_value) == 0) {
- *strchr(zc.zc_value, '@') = '\0';
- (void) strcat(zc.zc_value, suffix);
- }
- }
- } else {
- /*
- * If the fs does not exist, look for it based on the
- * fromsnap GUID.
- */
- if (resuming) {
- (void) snprintf(errbuf, sizeof (errbuf),
- dgettext(TEXT_DOMAIN,
- "cannot receive resume stream"));
- } else {
- (void) snprintf(errbuf, sizeof (errbuf),
- dgettext(TEXT_DOMAIN,
- "cannot receive incremental stream"));
- }
-
- (void) strcpy(zc.zc_name, zc.zc_value);
- *strchr(zc.zc_name, '@') = '\0';
-
- /*
- * If the exact receive path was specified and this is the
- * topmost path in the stream, then if the fs does not exist we
- * should look no further.
- */
- if ((flags->isprefix || (*(chopprefix = drrb->drr_toname +
- strlen(sendfs)) != '\0' && *chopprefix != '@')) &&
- !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
- char snap[ZFS_MAX_DATASET_NAME_LEN];
- (void) strcpy(snap, strchr(zc.zc_value, '@'));
- if (guid_to_name(hdl, zc.zc_name, drrb->drr_fromguid,
- B_FALSE, zc.zc_value) == 0) {
- *strchr(zc.zc_value, '@') = '\0';
- (void) strcat(zc.zc_value, snap);
- }
- }
- }
-
- (void) strcpy(zc.zc_name, zc.zc_value);
- *strchr(zc.zc_name, '@') = '\0';
-
- if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
- zfs_handle_t *zhp;
-
- /*
- * Destination fs exists. It must be one of these cases:
- * - an incremental send stream
- * - the stream specifies a new fs (full stream or clone)
- * and they want us to blow away the existing fs (and
- * have therefore specified -F and removed any snapshots)
- * - we are resuming a failed receive.
- */
- if (stream_wantsnewfs) {
- boolean_t is_volume = drrb->drr_type == DMU_OST_ZVOL;
- if (!flags->force) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination '%s' exists\n"
- "must specify -F to overwrite it"),
- zc.zc_name);
- return (zfs_error(hdl, EZFS_EXISTS, errbuf));
- }
- if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT,
- &zc) == 0) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination has snapshots (eg. %s)\n"
- "must destroy them to overwrite it"),
- zc.zc_name);
- return (zfs_error(hdl, EZFS_EXISTS, errbuf));
- }
- if (is_volume && strrchr(zc.zc_name, '/') == NULL) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination '%s' is the root dataset\n"
- "cannot overwrite with a ZVOL"),
- zc.zc_name);
- return (zfs_error(hdl, EZFS_EXISTS, errbuf));
- }
- if (is_volume &&
- ioctl(hdl->libzfs_fd, ZFS_IOC_DATASET_LIST_NEXT,
- &zc) == 0) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination has children (eg. %s)\n"
- "cannot overwrite with a ZVOL"),
- zc.zc_name);
- return (zfs_error(hdl, EZFS_WRONG_PARENT,
- errbuf));
- }
- }
-
- if ((zhp = zfs_open(hdl, zc.zc_name,
- ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) {
- zcmd_free_nvlists(&zc);
- return (-1);
- }
-
- if (stream_wantsnewfs &&
- zhp->zfs_dmustats.dds_origin[0]) {
- zcmd_free_nvlists(&zc);
- zfs_close(zhp);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination '%s' is a clone\n"
- "must destroy it to overwrite it"),
- zc.zc_name);
- return (zfs_error(hdl, EZFS_EXISTS, errbuf));
- }
-
- if (!flags->dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
- (stream_wantsnewfs || resuming)) {
- /* We can't do online recv in this case */
- clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
- flags->forceunmount ? MS_FORCE : 0);
- if (clp == NULL) {
- zfs_close(zhp);
- zcmd_free_nvlists(&zc);
- return (-1);
- }
- if (changelist_prefix(clp) != 0) {
- changelist_free(clp);
- zfs_close(zhp);
- zcmd_free_nvlists(&zc);
- return (-1);
- }
- }
-
- /*
- * If we are resuming a newfs, set newfs here so that we will
- * mount it if the recv succeeds this time. We can tell
- * that it was a newfs on the first recv because the fs
- * itself will be inconsistent (if the fs existed when we
- * did the first recv, we would have received it into
- * .../%recv).
- */
- if (resuming && zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT))
- newfs = B_TRUE;
-
- zfs_close(zhp);
- } else {
- zfs_handle_t *zhp;
-
- /*
- * Destination filesystem does not exist. Therefore we better
- * be creating a new filesystem (either from a full backup, or
- * a clone). It would therefore be invalid if the user
- * specified only the pool name (i.e. if the destination name
- * contained no slash character).
- */
- if (!stream_wantsnewfs ||
- (cp = strrchr(zc.zc_name, '/')) == NULL) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination '%s' does not exist"), zc.zc_name);
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
- }
-
- /*
- * Trim off the final dataset component so we perform the
- * recvbackup ioctl to the filesystems's parent.
- */
- *cp = '\0';
-
- if (flags->isprefix && !flags->istail && !flags->dryrun &&
- create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) {
- zcmd_free_nvlists(&zc);
- return (zfs_error(hdl, EZFS_BADRESTORE, errbuf));
- }
-
- /* validate parent */
- zhp = zfs_open(hdl, zc.zc_name, ZFS_TYPE_DATASET);
- if (zhp == NULL) {
- zcmd_free_nvlists(&zc);
- return (zfs_error(hdl, EZFS_BADRESTORE, errbuf));
- }
- if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
- zcmd_free_nvlists(&zc);
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "parent '%s' is not a filesystem"), zc.zc_name);
- zfs_close(zhp);
- return (zfs_error(hdl, EZFS_WRONG_PARENT, errbuf));
- }
- zfs_close(zhp);
-
- newfs = B_TRUE;
- }
-
- zc.zc_begin_record = *drr_noswap;
- zc.zc_cookie = infd;
- zc.zc_guid = flags->force;
- zc.zc_resumable = flags->resumable;
- if (flags->verbose) {
- (void) printf("%s %s stream of %s into %s\n",
- flags->dryrun ? "would receive" : "receiving",
- drrb->drr_fromguid ? "incremental" : "full",
- drrb->drr_toname, zc.zc_value);
- (void) fflush(stdout);
- }
-
- if (flags->dryrun) {
- zcmd_free_nvlists(&zc);
- return (recv_skip(hdl, infd, flags->byteswap));
- }
-
- zc.zc_nvlist_dst = (uint64_t)(uintptr_t)prop_errbuf;
- zc.zc_nvlist_dst_size = sizeof (prop_errbuf);
- zc.zc_cleanup_fd = cleanup_fd;
- zc.zc_action_handle = *action_handlep;
-
- err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc);
- ioctl_errno = errno;
- prop_errflags = (zprop_errflags_t)zc.zc_obj;
-
- if (err == 0) {
- nvlist_t *prop_errors;
- VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc.zc_nvlist_dst,
- zc.zc_nvlist_dst_size, &prop_errors, 0));
-
- nvpair_t *prop_err = NULL;
-
- while ((prop_err = nvlist_next_nvpair(prop_errors,
- prop_err)) != NULL) {
- char tbuf[1024];
- zfs_prop_t prop;
- int intval;
-
- prop = zfs_name_to_prop(nvpair_name(prop_err));
- (void) nvpair_value_int32(prop_err, &intval);
- if (strcmp(nvpair_name(prop_err),
- ZPROP_N_MORE_ERRORS) == 0) {
- trunc_prop_errs(intval);
- break;
- } else if (snapname == NULL || finalsnap == NULL ||
- strcmp(finalsnap, snapname) == 0 ||
- strcmp(nvpair_name(prop_err),
- zfs_prop_to_name(ZFS_PROP_REFQUOTA)) != 0) {
- /*
- * Skip the special case of, for example,
- * "refquota", errors on intermediate
- * snapshots leading up to a final one.
- * That's why we have all of the checks above.
- *
- * See zfs_ioctl.c's extract_delay_props() for
- * a list of props which can fail on
- * intermediate snapshots, but shouldn't
- * affect the overall receive.
- */
- (void) snprintf(tbuf, sizeof (tbuf),
- dgettext(TEXT_DOMAIN,
- "cannot receive %s property on %s"),
- nvpair_name(prop_err), zc.zc_name);
- zfs_setprop_error(hdl, prop, intval, tbuf);
- }
- }
- nvlist_free(prop_errors);
- }
-
- zc.zc_nvlist_dst = 0;
- zc.zc_nvlist_dst_size = 0;
- zcmd_free_nvlists(&zc);
-
- if (err == 0 && snapprops_nvlist) {
- zfs_cmd_t zc2 = { 0 };
-
- (void) strcpy(zc2.zc_name, zc.zc_value);
- zc2.zc_cookie = B_TRUE; /* received */
- if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) {
- (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2);
- zcmd_free_nvlists(&zc2);
- }
- }
-
- if (err && (ioctl_errno == ENOENT || ioctl_errno == EEXIST)) {
- /*
- * It may be that this snapshot already exists,
- * in which case we want to consume & ignore it
- * rather than failing.
- */
- avl_tree_t *local_avl;
- nvlist_t *local_nv, *fs;
- cp = strchr(zc.zc_value, '@');
-
- /*
- * XXX Do this faster by just iterating over snaps in
- * this fs. Also if zc_value does not exist, we will
- * get a strange "does not exist" error message.
- */
- *cp = '\0';
- if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, B_FALSE,
- B_FALSE, B_FALSE, &local_nv, &local_avl) == 0) {
- *cp = '@';
- fs = fsavl_find(local_avl, drrb->drr_toguid, NULL);
- fsavl_destroy(local_avl);
- nvlist_free(local_nv);
-
- if (fs != NULL) {
- if (flags->verbose) {
- (void) printf("snap %s already exists; "
- "ignoring\n", zc.zc_value);
- }
- err = ioctl_err = recv_skip(hdl, infd,
- flags->byteswap);
- }
- }
- *cp = '@';
- }
-
- if (ioctl_err != 0) {
- switch (ioctl_errno) {
- case ENODEV:
- cp = strchr(zc.zc_value, '@');
- *cp = '\0';
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "most recent snapshot of %s does not\n"
- "match incremental source"), zc.zc_value);
- (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
- *cp = '@';
- break;
- case ETXTBSY:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination %s has been modified\n"
- "since most recent snapshot"), zc.zc_name);
- (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
- break;
- case EEXIST:
- cp = strchr(zc.zc_value, '@');
- if (newfs) {
- /* it's the containing fs that exists */
- *cp = '\0';
- }
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination already exists"));
- (void) zfs_error_fmt(hdl, EZFS_EXISTS,
- dgettext(TEXT_DOMAIN, "cannot restore to %s"),
- zc.zc_value);
- *cp = '@';
- break;
- case EINVAL:
- (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- break;
- case ECKSUM:
- recv_ecksum_set_aux(hdl, zc.zc_value, flags->resumable);
- (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
- break;
- case ENOTSUP:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "pool must be upgraded to receive this stream."));
- (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
- break;
- case EDQUOT:
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "destination %s space quota exceeded"), zc.zc_name);
- (void) zfs_error(hdl, EZFS_NOSPC, errbuf);
- break;
- default:
- (void) zfs_standard_error(hdl, ioctl_errno, errbuf);
- }
- }
-
- /*
- * Mount the target filesystem (if created). Also mount any
- * children of the target filesystem if we did a replication
- * receive (indicated by stream_avl being non-NULL).
- */
- cp = strchr(zc.zc_value, '@');
- if (cp && (ioctl_err == 0 || !newfs)) {
- zfs_handle_t *h;
-
- *cp = '\0';
- h = zfs_open(hdl, zc.zc_value,
- ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
- if (h != NULL) {
- if (h->zfs_type == ZFS_TYPE_VOLUME) {
- *cp = '@';
- } else if (newfs || stream_avl) {
- /*
- * Track the first/top of hierarchy fs,
- * for mounting and sharing later.
- */
- if (top_zfs && *top_zfs == NULL)
- *top_zfs = zfs_strdup(hdl, zc.zc_value);
- }
- zfs_close(h);
- }
- *cp = '@';
- }
-
- if (clp) {
- if (!flags->nomount)
- err |= changelist_postfix(clp);
- changelist_free(clp);
- }
-
- if (prop_errflags & ZPROP_ERR_NOCLEAR) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: "
- "failed to clear unreceived properties on %s"),
- zc.zc_name);
- (void) fprintf(stderr, "\n");
- }
- if (prop_errflags & ZPROP_ERR_NORESTORE) {
- (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: "
- "failed to restore original properties on %s"),
- zc.zc_name);
- (void) fprintf(stderr, "\n");
- }
-
- if (err || ioctl_err)
- return (-1);
-
- *action_handlep = zc.zc_action_handle;
-
- if (flags->verbose) {
- char buf1[64];
- char buf2[64];
- uint64_t bytes = zc.zc_cookie;
- time_t delta = time(NULL) - begin_time;
- if (delta == 0)
- delta = 1;
- zfs_nicenum(bytes, buf1, sizeof (buf1));
- zfs_nicenum(bytes/delta, buf2, sizeof (buf1));
-
- (void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
- buf1, delta, buf2);
- }
-
- return (0);
-}
-
-static int
-zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap,
- const char *originsnap, recvflags_t *flags, int infd, const char *sendfs,
- nvlist_t *stream_nv, avl_tree_t *stream_avl, char **top_zfs, int cleanup_fd,
- uint64_t *action_handlep, const char *finalsnap)
-{
- int err;
- dmu_replay_record_t drr, drr_noswap;
- struct drr_begin *drrb = &drr.drr_u.drr_begin;
- char errbuf[1024];
- zio_cksum_t zcksum = { 0 };
- uint64_t featureflags;
- int hdrtype;
-
- (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
- "cannot receive"));
-
- if (flags->isprefix &&
- !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs "
- "(%s) does not exist"), tosnap);
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
- }
- if (originsnap &&
- !zfs_dataset_exists(hdl, originsnap, ZFS_TYPE_DATASET)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified origin fs "
- "(%s) does not exist"), originsnap);
- return (zfs_error(hdl, EZFS_NOENT, errbuf));
- }
-
- /* read in the BEGIN record */
- if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE,
- &zcksum)))
- return (err);
-
- if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) {
- /* It's the double end record at the end of a package */
- return (ENODATA);
- }
-
- /* the kernel needs the non-byteswapped begin record */
- drr_noswap = drr;
-
- flags->byteswap = B_FALSE;
- if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
- /*
- * We computed the checksum in the wrong byteorder in
- * recv_read() above; do it again correctly.
- */
- bzero(&zcksum, sizeof (zio_cksum_t));
- (void) fletcher_4_incremental_byteswap(&drr,
- sizeof (drr), &zcksum);
- flags->byteswap = B_TRUE;
-
- drr.drr_type = BSWAP_32(drr.drr_type);
- drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen);
- drrb->drr_magic = BSWAP_64(drrb->drr_magic);
- drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
- drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
- drrb->drr_type = BSWAP_32(drrb->drr_type);
- drrb->drr_flags = BSWAP_32(drrb->drr_flags);
- drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
- drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
- }
-
- if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
- "stream (bad magic number)"));
- return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
- }
-
- featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
- hdrtype = DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo);
-
- if (!DMU_STREAM_SUPPORTED(featureflags) ||
- (hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
- "stream has unsupported feature, feature flags = %lx"),
- featureflags);
- return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
- }
-
- if (strchr(drrb->drr_toname, '@') == NULL) {
- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
- "stream (bad snapshot name)"));
- return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
- }
-
- if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_SUBSTREAM) {
- char nonpackage_sendfs[ZFS_MAX_DATASET_NAME_LEN];
- if (sendfs == NULL) {
- /*
- * We were not called from zfs_receive_package(). Get
- * the fs specified by 'zfs send'.
- */
- char *cp;
- (void) strlcpy(nonpackage_sendfs,
- drr.drr_u.drr_begin.drr_toname,
- sizeof (nonpackage_sendfs));
- if ((cp = strchr(nonpackage_sendfs, '@')) != NULL)
- *cp = '\0';
- sendfs = nonpackage_sendfs;
- VERIFY(finalsnap == NULL);
- }
- return (zfs_receive_one(hdl, infd, tosnap, originsnap, flags,
- &drr, &drr_noswap, sendfs, stream_nv, stream_avl, top_zfs,
- cleanup_fd, action_handlep, finalsnap));
- } else {
- assert(DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
- DMU_COMPOUNDSTREAM);
- return (zfs_receive_package(hdl, infd, tosnap, flags, &drr,
- &zcksum, top_zfs, cleanup_fd, action_handlep));
- }
-}
-
-/*
- * Restores a backup of tosnap from the file descriptor specified by infd.
- * Return 0 on total success, -2 if some things couldn't be
- * destroyed/renamed/promoted, -1 if some things couldn't be received.
- * (-1 will override -2, if -1 and the resumable flag was specified the
- * transfer can be resumed if the sending side supports it).
- */
-int
-zfs_receive(libzfs_handle_t *hdl, const char *tosnap, nvlist_t *props,
- recvflags_t *flags, int infd, avl_tree_t *stream_avl)
-{
- char *top_zfs = NULL;
- int err;
- int cleanup_fd;
- uint64_t action_handle = 0;
- char *originsnap = NULL;
-
- if (props) {
- err = nvlist_lookup_string(props, "origin", &originsnap);
- if (err && err != ENOENT)
- return (err);
- }
-
- cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL);
- VERIFY(cleanup_fd >= 0);
-
- err = zfs_receive_impl(hdl, tosnap, originsnap, flags, infd, NULL, NULL,
- stream_avl, &top_zfs, cleanup_fd, &action_handle, NULL);
-
- VERIFY(0 == close(cleanup_fd));
-
- if (err == 0 && !flags->nomount && top_zfs) {
- zfs_handle_t *zhp;
- prop_changelist_t *clp;
-
- zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM);
- if (zhp != NULL) {
- clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT,
- CL_GATHER_MOUNT_ALWAYS,
- flags->forceunmount ? MS_FORCE : 0);
- zfs_close(zhp);
- if (clp != NULL) {
- /* mount and share received datasets */
- err = changelist_postfix(clp);
- changelist_free(clp);
- }
- }
- if (zhp == NULL || clp == NULL || err)
- err = -1;
- }
- if (top_zfs)
- free(top_zfs);
-
- return (err);
-}