diff options
Diffstat (limited to 'cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c')
| -rw-r--r-- | cddl/contrib/opensolaris/lib/libzfs/common/libzfs_sendrecv.c | 3924 |
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 2e2e1020ad8af..0000000000000 --- 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), >nd); - if (err != EEXIST) - err = zfs_iter_children(zhp, guid_to_name_cb, >nd); - if (err != EEXIST && bookmark_ok) - err = zfs_iter_bookmarks(zhp, guid_to_name_cb, >nd); - 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); -} |