5367
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <libdevinfo.h>
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#include <libintl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <fcntl.h>
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#include <sys/mount.h>
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#include <sys/mntent.h>
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#include <sys/mnttab.h>
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#include <sys/avl.h>
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#include <stddef.h>
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#include <libzfs.h>
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#include "zfs_namecheck.h"
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#include "zfs_prop.h"
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#include "libzfs_impl.h"
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#include <fletcher.c> /* XXX */
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/*
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* Routines for dealing with the AVL tree of fs-nvlists
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*/
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typedef struct fsavl_node {
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avl_node_t fn_node;
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nvlist_t *fn_nvfs;
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char *fn_snapname;
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uint64_t fn_guid;
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} fsavl_node_t;
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static int
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fsavl_compare(const void *arg1, const void *arg2)
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{
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const fsavl_node_t *fn1 = arg1;
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const fsavl_node_t *fn2 = arg2;
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if (fn1->fn_guid > fn2->fn_guid)
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return (+1);
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else if (fn1->fn_guid < fn2->fn_guid)
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return (-1);
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else
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return (0);
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}
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/*
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* Given the GUID of a snapshot, find its containing filesystem and
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* (optionally) name.
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*/
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static nvlist_t *
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fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname)
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{
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fsavl_node_t fn_find;
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fsavl_node_t *fn;
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fn_find.fn_guid = snapguid;
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fn = avl_find(avl, &fn_find, NULL);
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if (fn) {
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if (snapname)
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*snapname = fn->fn_snapname;
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return (fn->fn_nvfs);
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}
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return (NULL);
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}
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static avl_tree_t *
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fsavl_create(nvlist_t *fss)
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{
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avl_tree_t *fsavl;
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nvpair_t *fselem = NULL;
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fsavl = malloc(sizeof (avl_tree_t));
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avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t),
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offsetof(fsavl_node_t, fn_node));
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while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) {
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nvlist_t *nvfs, *snaps;
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nvpair_t *snapelem = NULL;
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VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
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VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
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while ((snapelem =
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nvlist_next_nvpair(snaps, snapelem)) != NULL) {
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fsavl_node_t *fn;
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uint64_t guid;
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VERIFY(0 == nvpair_value_uint64(snapelem, &guid));
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fn = malloc(sizeof (fsavl_node_t));
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fn->fn_nvfs = nvfs;
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fn->fn_snapname = nvpair_name(snapelem);
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fn->fn_guid = guid;
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/*
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* Note: if there are multiple snaps with the
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* same GUID, we ignore all but one.
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*/
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if (avl_find(fsavl, fn, NULL) == NULL)
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avl_add(fsavl, fn);
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else
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free(fn);
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}
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}
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return (fsavl);
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}
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static void
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fsavl_destroy(avl_tree_t *avl)
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{
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fsavl_node_t *fn;
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void *cookie;
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if (avl == NULL)
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return;
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cookie = NULL;
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while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL)
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free(fn);
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avl_destroy(avl);
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}
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/*
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* Routines for dealing with the giant nvlist of fs-nvlists, etc.
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*/
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typedef struct send_data {
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uint64_t parent_fromsnap_guid;
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nvlist_t *parent_snaps;
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nvlist_t *fss;
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const char *fromsnap;
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const char *tosnap;
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/*
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* The header nvlist is of the following format:
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* {
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* "tosnap" -> string
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* "fromsnap" -> string (if incremental)
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* "fss" -> {
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* id -> {
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*
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* "name" -> string (full name; for debugging)
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* "parentfromsnap" -> number (guid of fromsnap in parent)
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*
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* "props" -> { name -> value (only if set here) }
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* "snaps" -> { name (lastname) -> number (guid) }
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*
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* "origin" -> number (guid) (if clone)
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* "sent" -> boolean (not on-disk)
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* }
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* }
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* }
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*
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*/
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} send_data_t;
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static int
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send_iterate_snap(zfs_handle_t *zhp, void *arg)
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{
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send_data_t *sd = arg;
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uint64_t guid = zhp->zfs_dmustats.dds_guid;
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char *snapname;
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snapname = strrchr(zhp->zfs_name, '@')+1;
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VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid));
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/*
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* NB: if there is no fromsnap here (it's a newly created fs in
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* an incremental replication), we will substitute the tosnap.
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*/
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if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) ||
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(sd->parent_fromsnap_guid == 0 && sd->tosnap &&
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strcmp(snapname, sd->tosnap) == 0)) {
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sd->parent_fromsnap_guid = guid;
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}
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zfs_close(zhp);
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return (0);
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}
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static void
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send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv)
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{
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nvpair_t *elem = NULL;
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while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) {
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char *propname = nvpair_name(elem);
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zfs_prop_t prop = zfs_name_to_prop(propname);
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nvlist_t *propnv;
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if (!zfs_prop_user(propname) && zfs_prop_readonly(prop))
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continue;
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verify(nvpair_value_nvlist(elem, &propnv) == 0);
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if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION) {
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/* these guys are modifyable, but have no source */
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uint64_t value;
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verify(nvlist_lookup_uint64(propnv,
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ZPROP_VALUE, &value) == 0);
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} else {
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char *source;
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if (nvlist_lookup_string(propnv,
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ZPROP_SOURCE, &source) != 0)
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continue;
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if (strcmp(source, zhp->zfs_name) != 0)
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continue;
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}
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if (zfs_prop_user(propname) ||
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zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
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char *value;
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verify(nvlist_lookup_string(propnv,
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ZPROP_VALUE, &value) == 0);
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VERIFY(0 == nvlist_add_string(nv, propname, value));
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} else {
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uint64_t value;
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verify(nvlist_lookup_uint64(propnv,
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ZPROP_VALUE, &value) == 0);
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VERIFY(0 == nvlist_add_uint64(nv, propname, value));
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}
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}
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}
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static int
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send_iterate_fs(zfs_handle_t *zhp, void *arg)
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{
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send_data_t *sd = arg;
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nvlist_t *nvfs, *nv;
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int rv;
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uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid;
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uint64_t guid = zhp->zfs_dmustats.dds_guid;
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char guidstring[64];
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VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0));
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VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name));
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VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap",
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sd->parent_fromsnap_guid));
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if (zhp->zfs_dmustats.dds_origin[0]) {
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zfs_handle_t *origin = zfs_open(zhp->zfs_hdl,
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zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
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if (origin == NULL)
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return (-1);
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VERIFY(0 == nvlist_add_uint64(nvfs, "origin",
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origin->zfs_dmustats.dds_guid));
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}
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/* iterate over props */
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VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0));
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send_iterate_prop(zhp, nv);
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VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv));
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nvlist_free(nv);
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/* iterate over snaps, and set sd->parent_fromsnap_guid */
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sd->parent_fromsnap_guid = 0;
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VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0));
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(void) zfs_iter_snapshots(zhp, send_iterate_snap, sd);
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VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps));
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nvlist_free(sd->parent_snaps);
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/* add this fs to nvlist */
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(void) snprintf(guidstring, sizeof (guidstring),
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"0x%llx", (longlong_t)guid);
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VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs));
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nvlist_free(nvfs);
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/* iterate over children */
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rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd);
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sd->parent_fromsnap_guid = parent_fromsnap_guid_save;
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zfs_close(zhp);
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return (rv);
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}
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static int
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gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap,
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const char *tosnap, nvlist_t **nvlp, avl_tree_t **avlp)
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{
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zfs_handle_t *zhp;
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send_data_t sd = { 0 };
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int error;
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zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
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if (zhp == NULL)
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return (EZFS_BADTYPE);
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VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0));
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sd.fromsnap = fromsnap;
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sd.tosnap = tosnap;
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error = send_iterate_fs(zhp, &sd);
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*nvlp = sd.fss;
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if (avlp)
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*avlp = fsavl_create(sd.fss);
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return (error);
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}
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330 |
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/*
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* Routines for dealing with the sorted snapshot functionality
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*/
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typedef struct zfs_node {
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zfs_handle_t *zn_handle;
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avl_node_t zn_avlnode;
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} zfs_node_t;
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static int
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zfs_sort_snaps(zfs_handle_t *zhp, void *data)
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{
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avl_tree_t *avl = data;
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zfs_node_t *node = zfs_alloc(zhp->zfs_hdl, sizeof (zfs_node_t));
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node->zn_handle = zhp;
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avl_add(avl, node);
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return (0);
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}
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/* ARGSUSED */
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static int
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zfs_snapshot_compare(const void *larg, const void *rarg)
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{
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zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle;
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zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle;
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uint64_t lcreate, rcreate;
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357 |
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/*
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* Sort them according to creation time. We use the hidden
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* CREATETXG property to get an absolute ordering of snapshots.
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*/
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lcreate = zfs_prop_get_int(l, ZFS_PROP_CREATETXG);
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rcreate = zfs_prop_get_int(r, ZFS_PROP_CREATETXG);
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if (lcreate < rcreate)
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return (-1);
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else if (lcreate > rcreate)
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return (+1);
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else
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return (0);
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}
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static int
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zfs_iter_snapshots_sorted(zfs_handle_t *zhp, zfs_iter_f callback, void *data)
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{
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int ret = 0;
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zfs_node_t *node;
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avl_tree_t avl;
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void *cookie = NULL;
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380 |
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avl_create(&avl, zfs_snapshot_compare,
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sizeof (zfs_node_t), offsetof(zfs_node_t, zn_avlnode));
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ret = zfs_iter_snapshots(zhp, zfs_sort_snaps, &avl);
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for (node = avl_first(&avl); node != NULL; node = AVL_NEXT(&avl, node))
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ret |= callback(node->zn_handle, data);
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while ((node = avl_destroy_nodes(&avl, &cookie)) != NULL)
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free(node);
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avl_destroy(&avl);
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394 |
return (ret);
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}
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396 |
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397 |
/*
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398 |
* Routines specific to "zfs send"
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399 |
*/
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400 |
typedef struct send_dump_data {
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401 |
/* these are all just the short snapname (the part after the @) */
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const char *fromsnap;
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403 |
const char *tosnap;
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404 |
char lastsnap[ZFS_MAXNAMELEN];
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|
405 |
boolean_t seenfrom, seento, replicate, doall, fromorigin;
|
|
406 |
boolean_t verbose;
|
|
407 |
int outfd;
|
|
408 |
boolean_t err;
|
|
409 |
nvlist_t *fss;
|
|
410 |
avl_tree_t *fsavl;
|
|
411 |
} send_dump_data_t;
|
|
412 |
|
|
413 |
/*
|
|
414 |
* Dumps a backup of the given snapshot (incremental from fromsnap if it's not
|
|
415 |
* NULL) to the file descriptor specified by outfd.
|
|
416 |
*/
|
|
417 |
static int
|
|
418 |
dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, boolean_t fromorigin,
|
|
419 |
int outfd)
|
|
420 |
{
|
|
421 |
zfs_cmd_t zc = { 0 };
|
|
422 |
libzfs_handle_t *hdl = zhp->zfs_hdl;
|
|
423 |
|
|
424 |
assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
|
|
425 |
assert(fromsnap == NULL || fromsnap[0] == '\0' || !fromorigin);
|
|
426 |
|
|
427 |
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
|
|
428 |
if (fromsnap)
|
|
429 |
(void) strlcpy(zc.zc_value, fromsnap, sizeof (zc.zc_name));
|
|
430 |
zc.zc_cookie = outfd;
|
|
431 |
zc.zc_obj = fromorigin;
|
|
432 |
|
|
433 |
if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SEND, &zc) != 0) {
|
|
434 |
char errbuf[1024];
|
|
435 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
436 |
"warning: cannot send '%s'"), zhp->zfs_name);
|
|
437 |
|
|
438 |
switch (errno) {
|
|
439 |
|
|
440 |
case EXDEV:
|
|
441 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
442 |
"not an earlier snapshot from the same fs"));
|
|
443 |
return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
|
|
444 |
|
|
445 |
case ENOENT:
|
|
446 |
if (zfs_dataset_exists(hdl, zc.zc_name,
|
|
447 |
ZFS_TYPE_SNAPSHOT)) {
|
|
448 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
449 |
"incremental source (@%s) does not exist"),
|
|
450 |
zc.zc_value);
|
|
451 |
}
|
|
452 |
return (zfs_error(hdl, EZFS_NOENT, errbuf));
|
|
453 |
|
|
454 |
case EDQUOT:
|
|
455 |
case EFBIG:
|
|
456 |
case EIO:
|
|
457 |
case ENOLINK:
|
|
458 |
case ENOSPC:
|
|
459 |
case ENOSTR:
|
|
460 |
case ENXIO:
|
|
461 |
case EPIPE:
|
|
462 |
case ERANGE:
|
|
463 |
case EFAULT:
|
|
464 |
case EROFS:
|
|
465 |
zfs_error_aux(hdl, strerror(errno));
|
|
466 |
return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
|
|
467 |
|
|
468 |
default:
|
|
469 |
return (zfs_standard_error(hdl, errno, errbuf));
|
|
470 |
}
|
|
471 |
}
|
|
472 |
|
|
473 |
return (0);
|
|
474 |
}
|
|
475 |
|
|
476 |
static int
|
|
477 |
dump_snapshot(zfs_handle_t *zhp, void *arg)
|
|
478 |
{
|
|
479 |
send_dump_data_t *sdd = arg;
|
|
480 |
const char *thissnap;
|
|
481 |
int err;
|
|
482 |
|
|
483 |
thissnap = strchr(zhp->zfs_name, '@') + 1;
|
|
484 |
|
|
485 |
if (sdd->fromsnap && !sdd->seenfrom &&
|
|
486 |
strcmp(sdd->fromsnap, thissnap) == 0) {
|
|
487 |
sdd->seenfrom = B_TRUE;
|
|
488 |
(void) strcpy(sdd->lastsnap, thissnap);
|
|
489 |
zfs_close(zhp);
|
|
490 |
return (0);
|
|
491 |
}
|
|
492 |
|
|
493 |
if (sdd->seento || !sdd->seenfrom) {
|
|
494 |
zfs_close(zhp);
|
|
495 |
return (0);
|
|
496 |
}
|
|
497 |
|
|
498 |
/* send it */
|
|
499 |
if (sdd->verbose) {
|
|
500 |
(void) fprintf(stderr, "sending from @%s to %s\n",
|
|
501 |
sdd->lastsnap, zhp->zfs_name);
|
|
502 |
}
|
|
503 |
|
|
504 |
err = dump_ioctl(zhp, sdd->lastsnap,
|
|
505 |
sdd->lastsnap[0] == '\0' && (sdd->fromorigin || sdd->replicate),
|
|
506 |
sdd->outfd);
|
|
507 |
|
|
508 |
if (!sdd->seento && strcmp(sdd->tosnap, thissnap) == 0)
|
|
509 |
sdd->seento = B_TRUE;
|
|
510 |
|
|
511 |
(void) strcpy(sdd->lastsnap, thissnap);
|
|
512 |
zfs_close(zhp);
|
|
513 |
return (err);
|
|
514 |
}
|
|
515 |
|
|
516 |
static int
|
|
517 |
dump_filesystem(zfs_handle_t *zhp, void *arg)
|
|
518 |
{
|
|
519 |
int rv = 0;
|
|
520 |
send_dump_data_t *sdd = arg;
|
|
521 |
boolean_t missingfrom = B_FALSE;
|
|
522 |
zfs_cmd_t zc = { 0 };
|
|
523 |
|
|
524 |
(void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
|
|
525 |
zhp->zfs_name, sdd->tosnap);
|
|
526 |
if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) {
|
|
527 |
(void) fprintf(stderr, "WARNING: "
|
|
528 |
"could not send %s@%s: does not exist\n",
|
|
529 |
zhp->zfs_name, sdd->tosnap);
|
|
530 |
sdd->err = B_TRUE;
|
|
531 |
return (0);
|
|
532 |
}
|
|
533 |
|
|
534 |
if (sdd->replicate && sdd->fromsnap) {
|
|
535 |
/*
|
|
536 |
* If this fs does not have fromsnap, and we're doing
|
|
537 |
* recursive, we need to send a full stream from the
|
|
538 |
* beginning (or an incremental from the origin if this
|
|
539 |
* is a clone). If we're doing non-recursive, then let
|
|
540 |
* them get the error.
|
|
541 |
*/
|
|
542 |
(void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
|
|
543 |
zhp->zfs_name, sdd->fromsnap);
|
|
544 |
if (ioctl(zhp->zfs_hdl->libzfs_fd,
|
|
545 |
ZFS_IOC_OBJSET_STATS, &zc) != 0) {
|
|
546 |
missingfrom = B_TRUE;
|
|
547 |
}
|
|
548 |
}
|
|
549 |
|
|
550 |
if (sdd->doall) {
|
|
551 |
sdd->seenfrom = sdd->seento = sdd->lastsnap[0] = 0;
|
|
552 |
if (sdd->fromsnap == NULL || missingfrom)
|
|
553 |
sdd->seenfrom = B_TRUE;
|
|
554 |
|
|
555 |
rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg);
|
|
556 |
if (!sdd->seenfrom) {
|
|
557 |
(void) fprintf(stderr,
|
|
558 |
"WARNING: could not send %s@%s:\n"
|
|
559 |
"incremental source (%s@%s) does not exist\n",
|
|
560 |
zhp->zfs_name, sdd->tosnap,
|
|
561 |
zhp->zfs_name, sdd->fromsnap);
|
|
562 |
sdd->err = B_TRUE;
|
|
563 |
} else if (!sdd->seento) {
|
|
564 |
(void) fprintf(stderr,
|
|
565 |
"WARNING: could not send %s@%s:\n"
|
|
566 |
"incremental source (%s@%s) "
|
|
567 |
"is not earlier than it\n",
|
|
568 |
zhp->zfs_name, sdd->tosnap,
|
|
569 |
zhp->zfs_name, sdd->fromsnap);
|
|
570 |
sdd->err = B_TRUE;
|
|
571 |
}
|
|
572 |
} else {
|
|
573 |
zfs_handle_t *snapzhp;
|
|
574 |
char snapname[ZFS_MAXNAMELEN];
|
|
575 |
|
|
576 |
(void) snprintf(snapname, sizeof (snapname), "%s@%s",
|
|
577 |
zfs_get_name(zhp), sdd->tosnap);
|
|
578 |
snapzhp = zfs_open(zhp->zfs_hdl, snapname, ZFS_TYPE_SNAPSHOT);
|
|
579 |
rv = dump_ioctl(snapzhp,
|
|
580 |
missingfrom ? NULL : sdd->fromsnap,
|
|
581 |
sdd->fromorigin || missingfrom,
|
|
582 |
sdd->outfd);
|
|
583 |
sdd->seento = B_TRUE;
|
|
584 |
zfs_close(snapzhp);
|
|
585 |
}
|
|
586 |
|
|
587 |
return (rv);
|
|
588 |
}
|
|
589 |
|
|
590 |
static int
|
|
591 |
dump_filesystems(zfs_handle_t *rzhp, void *arg)
|
|
592 |
{
|
|
593 |
send_dump_data_t *sdd = arg;
|
|
594 |
nvpair_t *fspair;
|
|
595 |
boolean_t needagain, progress;
|
|
596 |
|
|
597 |
if (!sdd->replicate)
|
|
598 |
return (dump_filesystem(rzhp, sdd));
|
|
599 |
|
|
600 |
again:
|
|
601 |
needagain = progress = B_FALSE;
|
|
602 |
for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
|
|
603 |
fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
|
|
604 |
nvlist_t *fslist;
|
|
605 |
char *fsname;
|
|
606 |
zfs_handle_t *zhp;
|
|
607 |
int err;
|
|
608 |
uint64_t origin_guid = 0;
|
|
609 |
nvlist_t *origin_nv;
|
|
610 |
|
|
611 |
VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0);
|
|
612 |
if (nvlist_lookup_boolean(fslist, "sent") == 0)
|
|
613 |
continue;
|
|
614 |
|
|
615 |
VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0);
|
|
616 |
(void) nvlist_lookup_uint64(fslist, "origin", &origin_guid);
|
|
617 |
|
|
618 |
origin_nv = fsavl_find(sdd->fsavl, origin_guid, NULL);
|
|
619 |
if (origin_nv &&
|
|
620 |
nvlist_lookup_boolean(origin_nv, "sent") == ENOENT) {
|
|
621 |
/*
|
|
622 |
* origin has not been sent yet;
|
|
623 |
* skip this clone.
|
|
624 |
*/
|
|
625 |
needagain = B_TRUE;
|
|
626 |
continue;
|
|
627 |
}
|
|
628 |
|
|
629 |
zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET);
|
|
630 |
err = dump_filesystem(zhp, sdd);
|
|
631 |
VERIFY(nvlist_add_boolean(fslist, "sent") == 0);
|
|
632 |
progress = B_TRUE;
|
|
633 |
zfs_close(zhp);
|
|
634 |
if (err)
|
|
635 |
return (err);
|
|
636 |
}
|
|
637 |
if (needagain) {
|
|
638 |
assert(progress);
|
|
639 |
goto again;
|
|
640 |
}
|
|
641 |
return (0);
|
|
642 |
}
|
|
643 |
|
|
644 |
/*
|
|
645 |
* Dumps a backup of tosnap, incremental from fromsnap if it isn't NULL.
|
|
646 |
* If 'doall', dump all intermediate snaps.
|
|
647 |
* If 'replicate', dump special header and do recursively.
|
|
648 |
*/
|
|
649 |
int
|
|
650 |
zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
|
|
651 |
boolean_t replicate, boolean_t doall, boolean_t fromorigin,
|
|
652 |
boolean_t verbose, int outfd)
|
|
653 |
{
|
|
654 |
char errbuf[1024];
|
|
655 |
send_dump_data_t sdd = { 0 };
|
|
656 |
int err;
|
|
657 |
nvlist_t *fss = NULL;
|
|
658 |
avl_tree_t *fsavl = NULL;
|
|
659 |
|
|
660 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
661 |
"cannot send '%s'"), zhp->zfs_name);
|
|
662 |
|
|
663 |
if (fromsnap && fromsnap[0] == '\0') {
|
|
664 |
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
|
|
665 |
"zero-length incremental source"));
|
|
666 |
return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
|
|
667 |
}
|
|
668 |
|
|
669 |
if (replicate || doall) {
|
|
670 |
dmu_replay_record_t drr = { 0 };
|
|
671 |
char *packbuf = NULL;
|
|
672 |
size_t buflen = 0;
|
|
673 |
zio_cksum_t zc = { 0 };
|
|
674 |
|
|
675 |
assert(fromsnap || doall);
|
|
676 |
|
|
677 |
if (replicate) {
|
|
678 |
nvlist_t *hdrnv;
|
|
679 |
|
|
680 |
VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0));
|
|
681 |
if (fromsnap) {
|
|
682 |
VERIFY(0 == nvlist_add_string(hdrnv,
|
|
683 |
"fromsnap", fromsnap));
|
|
684 |
}
|
|
685 |
VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap));
|
|
686 |
|
|
687 |
err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name,
|
|
688 |
fromsnap, tosnap, &fss, &fsavl);
|
|
689 |
if (err)
|
|
690 |
return (err);
|
|
691 |
VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss));
|
|
692 |
err = nvlist_pack(hdrnv, &packbuf, &buflen,
|
|
693 |
NV_ENCODE_XDR, 0);
|
|
694 |
nvlist_free(hdrnv);
|
|
695 |
if (err) {
|
|
696 |
fsavl_destroy(fsavl);
|
|
697 |
nvlist_free(fss);
|
|
698 |
return (zfs_standard_error(zhp->zfs_hdl,
|
|
699 |
err, errbuf));
|
|
700 |
}
|
|
701 |
}
|
|
702 |
|
|
703 |
/* write first begin record */
|
|
704 |
drr.drr_type = DRR_BEGIN;
|
|
705 |
drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
|
|
706 |
drr.drr_u.drr_begin.drr_version = DMU_BACKUP_HEADER_VERSION;
|
|
707 |
(void) snprintf(drr.drr_u.drr_begin.drr_toname,
|
|
708 |
sizeof (drr.drr_u.drr_begin.drr_toname),
|
|
709 |
"%s@%s", zhp->zfs_name, tosnap);
|
|
710 |
drr.drr_payloadlen = buflen;
|
|
711 |
fletcher_4_incremental_native(&drr, sizeof (drr), &zc);
|
|
712 |
err = write(outfd, &drr, sizeof (drr));
|
|
713 |
|
|
714 |
/* write header nvlist */
|
|
715 |
if (err != -1) {
|
|
716 |
fletcher_4_incremental_native(packbuf, buflen, &zc);
|
|
717 |
err = write(outfd, packbuf, buflen);
|
|
718 |
}
|
|
719 |
free(packbuf);
|
|
720 |
if (err == -1) {
|
|
721 |
fsavl_destroy(fsavl);
|
|
722 |
nvlist_free(fss);
|
|
723 |
return (zfs_standard_error(zhp->zfs_hdl,
|
|
724 |
errno, errbuf));
|
|
725 |
}
|
|
726 |
|
|
727 |
/* write end record */
|
|
728 |
if (err != -1) {
|
|
729 |
bzero(&drr, sizeof (drr));
|
|
730 |
drr.drr_type = DRR_END;
|
|
731 |
drr.drr_u.drr_end.drr_checksum = zc;
|
|
732 |
err = write(outfd, &drr, sizeof (drr));
|
|
733 |
if (err == -1) {
|
|
734 |
fsavl_destroy(fsavl);
|
|
735 |
nvlist_free(fss);
|
|
736 |
return (zfs_standard_error(zhp->zfs_hdl,
|
|
737 |
errno, errbuf));
|
|
738 |
}
|
|
739 |
}
|
|
740 |
}
|
|
741 |
|
|
742 |
/* dump each stream */
|
|
743 |
sdd.fromsnap = fromsnap;
|
|
744 |
sdd.tosnap = tosnap;
|
|
745 |
sdd.outfd = outfd;
|
|
746 |
sdd.replicate = replicate;
|
|
747 |
sdd.doall = doall;
|
|
748 |
sdd.fromorigin = fromorigin;
|
|
749 |
sdd.fss = fss;
|
|
750 |
sdd.fsavl = fsavl;
|
|
751 |
sdd.verbose = verbose;
|
|
752 |
err = dump_filesystems(zhp, &sdd);
|
|
753 |
fsavl_destroy(fsavl);
|
|
754 |
nvlist_free(fss);
|
|
755 |
|
|
756 |
if (replicate || doall) {
|
|
757 |
/*
|
|
758 |
* write final end record. NB: want to do this even if
|
|
759 |
* there was some error, because it might not be totally
|
|
760 |
* failed.
|
|
761 |
*/
|
|
762 |
dmu_replay_record_t drr = { 0 };
|
|
763 |
drr.drr_type = DRR_END;
|
|
764 |
if (write(outfd, &drr, sizeof (drr)) == -1) {
|
|
765 |
return (zfs_standard_error(zhp->zfs_hdl,
|
|
766 |
errno, errbuf));
|
|
767 |
}
|
|
768 |
}
|
|
769 |
|
|
770 |
return (err || sdd.err);
|
|
771 |
}
|
|
772 |
|
|
773 |
/*
|
|
774 |
* Routines specific to "zfs recv"
|
|
775 |
*/
|
|
776 |
|
|
777 |
static int
|
|
778 |
recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen,
|
|
779 |
boolean_t byteswap, zio_cksum_t *zc)
|
|
780 |
{
|
|
781 |
char *cp = buf;
|
|
782 |
int rv;
|
|
783 |
int len = ilen;
|
|
784 |
|
|
785 |
do {
|
|
786 |
rv = read(fd, cp, len);
|
|
787 |
cp += rv;
|
|
788 |
len -= rv;
|
|
789 |
} while (rv > 0);
|
|
790 |
|
|
791 |
if (rv < 0 || len != 0) {
|
|
792 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
793 |
"failed to read from stream"));
|
|
794 |
return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN,
|
|
795 |
"cannot receive")));
|
|
796 |
}
|
|
797 |
|
|
798 |
if (zc) {
|
|
799 |
if (byteswap)
|
|
800 |
fletcher_4_incremental_byteswap(buf, ilen, zc);
|
|
801 |
else
|
|
802 |
fletcher_4_incremental_native(buf, ilen, zc);
|
|
803 |
}
|
|
804 |
return (0);
|
|
805 |
}
|
|
806 |
|
|
807 |
static int
|
|
808 |
recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp,
|
|
809 |
boolean_t byteswap, zio_cksum_t *zc)
|
|
810 |
{
|
|
811 |
char *buf;
|
|
812 |
int err;
|
|
813 |
|
|
814 |
buf = zfs_alloc(hdl, len);
|
|
815 |
if (buf == NULL)
|
|
816 |
return (ENOMEM);
|
|
817 |
|
|
818 |
err = recv_read(hdl, fd, buf, len, byteswap, zc);
|
|
819 |
if (err != 0) {
|
|
820 |
free(buf);
|
|
821 |
return (err);
|
|
822 |
}
|
|
823 |
|
|
824 |
err = nvlist_unpack(buf, len, nvp, 0);
|
|
825 |
free(buf);
|
|
826 |
if (err != 0) {
|
|
827 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
|
|
828 |
"stream (malformed nvlist)"));
|
|
829 |
return (EINVAL);
|
|
830 |
}
|
|
831 |
return (0);
|
|
832 |
}
|
|
833 |
|
|
834 |
static int
|
|
835 |
recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname,
|
|
836 |
int baselen, char *newname, recvflags_t flags)
|
|
837 |
{
|
|
838 |
static int seq;
|
|
839 |
zfs_cmd_t zc = { 0 };
|
|
840 |
int err;
|
|
841 |
prop_changelist_t *clp = NULL;
|
|
842 |
|
|
843 |
if (strchr(name, '@') == NULL) {
|
|
844 |
zfs_handle_t *zhp = zfs_open(hdl, name,
|
|
845 |
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
|
|
846 |
if (zhp == NULL)
|
|
847 |
return (-1);
|
|
848 |
clp = changelist_gather(zhp, ZFS_PROP_NAME,
|
|
849 |
flags.force ? MS_FORCE : 0);
|
|
850 |
zfs_close(zhp);
|
|
851 |
if (clp == NULL)
|
|
852 |
return (-1);
|
|
853 |
err = changelist_prefix(clp);
|
|
854 |
if (err)
|
|
855 |
return (err);
|
|
856 |
}
|
|
857 |
|
|
858 |
if (tryname) {
|
|
859 |
(void) strcpy(newname, tryname);
|
|
860 |
|
|
861 |
zc.zc_objset_type = DMU_OST_ZFS;
|
|
862 |
(void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
|
|
863 |
(void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value));
|
|
864 |
|
|
865 |
if (flags.verbose) {
|
|
866 |
(void) printf("attempting rename %s to %s\n",
|
|
867 |
zc.zc_name, zc.zc_value);
|
|
868 |
}
|
|
869 |
err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc);
|
|
870 |
if (err == 0 && clp)
|
|
871 |
changelist_rename(clp, name, tryname);
|
|
872 |
} else {
|
|
873 |
err = ENOENT;
|
|
874 |
}
|
|
875 |
|
|
876 |
if (err != 0 && strncmp(name+baselen, "recv-", 5) != 0) {
|
|
877 |
seq++;
|
|
878 |
|
|
879 |
(void) strncpy(newname, name, baselen);
|
|
880 |
(void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen,
|
|
881 |
"recv-%u-%u", getpid(), seq);
|
|
882 |
(void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value));
|
|
883 |
|
|
884 |
if (flags.verbose) {
|
|
885 |
(void) printf("failed - trying rename %s to %s\n",
|
|
886 |
zc.zc_name, zc.zc_value);
|
|
887 |
}
|
|
888 |
err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc);
|
|
889 |
if (err == 0 && clp)
|
|
890 |
changelist_rename(clp, name, newname);
|
|
891 |
if (err && flags.verbose) {
|
|
892 |
(void) printf("failed (%u) - "
|
|
893 |
"will try again on next pass\n", errno);
|
|
894 |
}
|
|
895 |
err = EAGAIN;
|
|
896 |
} else if (flags.verbose) {
|
|
897 |
if (err == 0)
|
|
898 |
(void) printf("success\n");
|
|
899 |
else
|
|
900 |
(void) printf("failed (%u)\n", errno);
|
|
901 |
}
|
|
902 |
|
|
903 |
if (clp) {
|
|
904 |
(void) changelist_postfix(clp);
|
|
905 |
changelist_free(clp);
|
|
906 |
}
|
|
907 |
|
|
908 |
|
|
909 |
return (err);
|
|
910 |
}
|
|
911 |
|
|
912 |
static int
|
|
913 |
recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen,
|
|
914 |
char *newname, recvflags_t flags)
|
|
915 |
{
|
|
916 |
zfs_cmd_t zc = { 0 };
|
|
917 |
int err;
|
|
918 |
zfs_handle_t *zhp = NULL;
|
|
919 |
|
|
920 |
zc.zc_objset_type = DMU_OST_ZFS;
|
|
921 |
(void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
|
|
922 |
|
|
923 |
/* unmount it */
|
|
924 |
if (strchr(name, '@') == NULL) {
|
|
925 |
zhp = zfs_open(hdl, name,
|
|
926 |
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
|
|
927 |
if (zhp == NULL)
|
|
928 |
return (-1);
|
|
929 |
err = zfs_unmount(zhp, NULL, flags.force ? MS_FORCE : 0);
|
|
930 |
if (err) {
|
|
931 |
zfs_close(zhp);
|
|
932 |
return (err);
|
|
933 |
}
|
|
934 |
}
|
|
935 |
|
|
936 |
if (flags.verbose)
|
|
937 |
(void) printf("attempting destroy %s\n", zc.zc_name);
|
|
938 |
err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc);
|
|
939 |
|
|
940 |
if (err != 0) {
|
|
941 |
(void) zfs_mount(zhp, NULL, 0);
|
|
942 |
err = recv_rename(hdl, name, NULL, baselen, newname, flags);
|
|
943 |
}
|
|
944 |
if (zhp)
|
|
945 |
zfs_close(zhp);
|
|
946 |
|
|
947 |
if (flags.verbose) {
|
|
948 |
if (err == 0)
|
|
949 |
(void) printf("success\n");
|
|
950 |
else
|
|
951 |
(void) printf("failed (%u)\n", errno);
|
|
952 |
}
|
|
953 |
|
|
954 |
return (err);
|
|
955 |
}
|
|
956 |
|
|
957 |
typedef struct guid_to_name_data {
|
|
958 |
uint64_t guid;
|
|
959 |
char *name;
|
|
960 |
} guid_to_name_data_t;
|
|
961 |
|
|
962 |
static int
|
|
963 |
guid_to_name_cb(zfs_handle_t *zhp, void *arg)
|
|
964 |
{
|
|
965 |
guid_to_name_data_t *gtnd = arg;
|
|
966 |
int err;
|
|
967 |
|
|
968 |
if (zhp->zfs_dmustats.dds_guid == gtnd->guid) {
|
|
969 |
(void) strcpy(gtnd->name, zhp->zfs_name);
|
|
970 |
return (EEXIST);
|
|
971 |
}
|
|
972 |
err = zfs_iter_children(zhp, guid_to_name_cb, gtnd);
|
|
973 |
zfs_close(zhp);
|
|
974 |
return (err);
|
|
975 |
}
|
|
976 |
|
|
977 |
static int
|
|
978 |
guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid,
|
|
979 |
char *name)
|
|
980 |
{
|
|
981 |
/* exhaustive search all local snapshots */
|
|
982 |
guid_to_name_data_t gtnd;
|
|
983 |
int err = 0;
|
|
984 |
zfs_handle_t *zhp;
|
|
985 |
char *cp;
|
|
986 |
|
|
987 |
gtnd.guid = guid;
|
|
988 |
gtnd.name = name;
|
|
989 |
|
|
990 |
if (strchr(parent, '@') == NULL) {
|
|
991 |
zhp = make_dataset_handle(hdl, parent);
|
|
992 |
if (zhp != NULL) {
|
|
993 |
err = zfs_iter_children(zhp, guid_to_name_cb, >nd);
|
|
994 |
zfs_close(zhp);
|
|
995 |
if (err == EEXIST)
|
|
996 |
return (0);
|
|
997 |
}
|
|
998 |
}
|
|
999 |
|
|
1000 |
cp = strchr(parent, '/');
|
|
1001 |
if (cp)
|
|
1002 |
*cp = '\0';
|
|
1003 |
zhp = make_dataset_handle(hdl, parent);
|
|
1004 |
if (cp)
|
|
1005 |
*cp = '/';
|
|
1006 |
|
|
1007 |
if (zhp) {
|
|
1008 |
err = zfs_iter_children(zhp, guid_to_name_cb, >nd);
|
|
1009 |
zfs_close(zhp);
|
|
1010 |
}
|
|
1011 |
|
|
1012 |
return (err == EEXIST ? 0 : ENOENT);
|
|
1013 |
|
|
1014 |
}
|
|
1015 |
|
|
1016 |
/*
|
|
1017 |
* Return true if dataset guid1 is created before guid2.
|
|
1018 |
*/
|
|
1019 |
static boolean_t
|
|
1020 |
created_before(libzfs_handle_t *hdl, avl_tree_t *avl,
|
|
1021 |
uint64_t guid1, uint64_t guid2)
|
|
1022 |
{
|
|
1023 |
nvlist_t *nvfs;
|
|
1024 |
char *fsname, *snapname;
|
|
1025 |
char buf[ZFS_MAXNAMELEN];
|
|
1026 |
boolean_t rv;
|
|
1027 |
zfs_node_t zn1, zn2;
|
|
1028 |
|
|
1029 |
if (guid2 == 0)
|
|
1030 |
return (B_FALSE);
|
|
1031 |
if (guid1 == 0)
|
|
1032 |
return (B_TRUE);
|
|
1033 |
|
|
1034 |
nvfs = fsavl_find(avl, guid1, &snapname);
|
|
1035 |
VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
|
|
1036 |
(void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
|
|
1037 |
zn1.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
|
|
1038 |
|
|
1039 |
nvfs = fsavl_find(avl, guid2, &snapname);
|
|
1040 |
VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
|
|
1041 |
(void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
|
|
1042 |
zn2.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
|
|
1043 |
|
|
1044 |
rv = (zfs_snapshot_compare(&zn1, &zn2) == -1);
|
|
1045 |
|
|
1046 |
zfs_close(zn1.zn_handle);
|
|
1047 |
zfs_close(zn2.zn_handle);
|
|
1048 |
|
|
1049 |
return (rv);
|
|
1050 |
}
|
|
1051 |
|
|
1052 |
static int
|
|
1053 |
recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs,
|
|
1054 |
recvflags_t flags, nvlist_t *stream_nv, avl_tree_t *stream_avl)
|
|
1055 |
{
|
|
1056 |
nvlist_t *local_nv;
|
|
1057 |
avl_tree_t *local_avl;
|
|
1058 |
nvpair_t *fselem, *nextfselem;
|
|
1059 |
char *tosnap, *fromsnap;
|
|
1060 |
char newname[ZFS_MAXNAMELEN];
|
|
1061 |
int error;
|
|
1062 |
boolean_t needagain, progress;
|
|
1063 |
|
|
1064 |
VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap));
|
|
1065 |
VERIFY(0 == nvlist_lookup_string(stream_nv, "tosnap", &tosnap));
|
|
1066 |
|
|
1067 |
if (flags.dryrun)
|
|
1068 |
return (0);
|
|
1069 |
|
|
1070 |
again:
|
|
1071 |
needagain = progress = B_FALSE;
|
|
1072 |
|
|
1073 |
if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL,
|
|
1074 |
&local_nv, &local_avl)) != 0)
|
|
1075 |
return (error);
|
|
1076 |
|
|
1077 |
/*
|
|
1078 |
* Process deletes and renames
|
|
1079 |
*/
|
|
1080 |
for (fselem = nvlist_next_nvpair(local_nv, NULL);
|
|
1081 |
fselem; fselem = nextfselem) {
|
|
1082 |
nvlist_t *nvfs, *snaps;
|
|
1083 |
nvlist_t *stream_nvfs = NULL;
|
|
1084 |
nvpair_t *snapelem, *nextsnapelem;
|
|
1085 |
uint64_t fromguid = 0;
|
|
1086 |
uint64_t originguid = 0;
|
|
1087 |
uint64_t stream_originguid = 0;
|
|
1088 |
uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid;
|
|
1089 |
char *fsname, *stream_fsname;
|
|
1090 |
|
|
1091 |
nextfselem = nvlist_next_nvpair(local_nv, fselem);
|
|
1092 |
|
|
1093 |
VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
|
|
1094 |
VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
|
|
1095 |
VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
|
|
1096 |
VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap",
|
|
1097 |
&parent_fromsnap_guid));
|
|
1098 |
(void) nvlist_lookup_uint64(nvfs, "origin", &originguid);
|
|
1099 |
|
|
1100 |
/*
|
|
1101 |
* First find the stream's fs, so we can check for
|
|
1102 |
* a different origin (due to "zfs promote")
|
|
1103 |
*/
|
|
1104 |
for (snapelem = nvlist_next_nvpair(snaps, NULL);
|
|
1105 |
snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) {
|
|
1106 |
uint64_t thisguid;
|
|
1107 |
|
|
1108 |
VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
|
|
1109 |
stream_nvfs = fsavl_find(stream_avl, thisguid, NULL);
|
|
1110 |
|
|
1111 |
if (stream_nvfs != NULL)
|
|
1112 |
break;
|
|
1113 |
}
|
|
1114 |
|
|
1115 |
/* check for promote */
|
|
1116 |
(void) nvlist_lookup_uint64(stream_nvfs, "origin",
|
|
1117 |
&stream_originguid);
|
|
1118 |
if (stream_nvfs && originguid != stream_originguid) {
|
|
1119 |
if (created_before(hdl, local_avl, stream_originguid,
|
|
1120 |
originguid)) {
|
|
1121 |
/* promote it! */
|
|
1122 |
zfs_cmd_t zc = { 0 };
|
|
1123 |
nvlist_t *origin_nvfs;
|
|
1124 |
char *origin_fsname;
|
|
1125 |
|
|
1126 |
if (flags.verbose)
|
|
1127 |
(void) printf("promoting %s\n", fsname);
|
|
1128 |
|
|
1129 |
origin_nvfs = fsavl_find(local_avl, originguid,
|
|
1130 |
NULL);
|
|
1131 |
VERIFY(0 == nvlist_lookup_string(origin_nvfs,
|
|
1132 |
"name", &origin_fsname));
|
|
1133 |
(void) strlcpy(zc.zc_value, origin_fsname,
|
|
1134 |
sizeof (zc.zc_value));
|
|
1135 |
(void) strlcpy(zc.zc_name, fsname,
|
|
1136 |
sizeof (zc.zc_name));
|
|
1137 |
error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
|
|
1138 |
if (error == 0)
|
|
1139 |
progress = B_TRUE;
|
|
1140 |
}
|
|
1141 |
/*
|
|
1142 |
* We had/have the wrong origin, therefore our
|
|
1143 |
* list of snapshots is wrong. Need to handle
|
|
1144 |
* them on the next pass.
|
|
1145 |
*/
|
|
1146 |
needagain = B_TRUE;
|
|
1147 |
continue;
|
|
1148 |
}
|
|
1149 |
|
|
1150 |
for (snapelem = nvlist_next_nvpair(snaps, NULL);
|
|
1151 |
snapelem; snapelem = nextsnapelem) {
|
|
1152 |
uint64_t thisguid;
|
|
1153 |
char *stream_snapname;
|
|
1154 |
nvlist_t *found;
|
|
1155 |
|
|
1156 |
nextsnapelem = nvlist_next_nvpair(snaps, snapelem);
|
|
1157 |
|
|
1158 |
VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
|
|
1159 |
found = fsavl_find(stream_avl, thisguid,
|
|
1160 |
&stream_snapname);
|
|
1161 |
|
|
1162 |
/* check for delete */
|
|
1163 |
if (found == NULL) {
|
|
1164 |
char name[ZFS_MAXNAMELEN];
|
|
1165 |
|
|
1166 |
if (!flags.force)
|
|
1167 |
continue;
|
|
1168 |
|
|
1169 |
(void) snprintf(name, sizeof (name), "%s@%s",
|
|
1170 |
fsname, nvpair_name(snapelem));
|
|
1171 |
|
|
1172 |
error = recv_destroy(hdl, name,
|
|
1173 |
strlen(fsname)+1, newname, flags);
|
|
1174 |
if (error)
|
|
1175 |
needagain = B_TRUE;
|
|
1176 |
else
|
|
1177 |
progress = B_TRUE;
|
|
1178 |
continue;
|
|
1179 |
}
|
|
1180 |
|
|
1181 |
stream_nvfs = found;
|
|
1182 |
|
|
1183 |
/* check for different snapname */
|
|
1184 |
if (strcmp(nvpair_name(snapelem),
|
|
1185 |
stream_snapname) != 0) {
|
|
1186 |
char name[ZFS_MAXNAMELEN];
|
|
1187 |
char tryname[ZFS_MAXNAMELEN];
|
|
1188 |
|
|
1189 |
(void) snprintf(name, sizeof (name), "%s@%s",
|
|
1190 |
fsname, nvpair_name(snapelem));
|
|
1191 |
(void) snprintf(tryname, sizeof (name), "%s@%s",
|
|
1192 |
fsname, stream_snapname);
|
|
1193 |
|
|
1194 |
error = recv_rename(hdl, name, tryname,
|
|
1195 |
strlen(fsname)+1, newname, flags);
|
|
1196 |
if (error)
|
|
1197 |
needagain = B_TRUE;
|
|
1198 |
else
|
|
1199 |
progress = B_TRUE;
|
|
1200 |
}
|
|
1201 |
|
|
1202 |
if (strcmp(stream_snapname, fromsnap) == 0)
|
|
1203 |
fromguid = thisguid;
|
|
1204 |
}
|
|
1205 |
|
|
1206 |
/* check for delete */
|
|
1207 |
if (stream_nvfs == NULL) {
|
|
1208 |
if (!flags.force)
|
|
1209 |
continue;
|
|
1210 |
|
|
1211 |
error = recv_destroy(hdl, fsname, strlen(tofs)+1,
|
|
1212 |
newname, flags);
|
|
1213 |
if (error)
|
|
1214 |
needagain = B_TRUE;
|
|
1215 |
else
|
|
1216 |
progress = B_TRUE;
|
|
1217 |
continue;
|
|
1218 |
}
|
|
1219 |
|
|
1220 |
if (fromguid == 0 && flags.verbose) {
|
|
1221 |
(void) printf("local fs %s does not have fromsnap "
|
|
1222 |
"(%s in stream); must have been deleted locally; "
|
|
1223 |
"ignoring\n", fsname, fromsnap);
|
|
1224 |
continue;
|
|
1225 |
}
|
|
1226 |
|
|
1227 |
VERIFY(0 == nvlist_lookup_string(stream_nvfs,
|
|
1228 |
"name", &stream_fsname));
|
|
1229 |
VERIFY(0 == nvlist_lookup_uint64(stream_nvfs,
|
|
1230 |
"parentfromsnap", &stream_parent_fromsnap_guid));
|
|
1231 |
|
|
1232 |
/* check for rename */
|
|
1233 |
if ((stream_parent_fromsnap_guid != 0 &&
|
|
1234 |
stream_parent_fromsnap_guid != parent_fromsnap_guid) ||
|
|
1235 |
strcmp(strrchr(fsname, '/'),
|
|
1236 |
strrchr(stream_fsname, '/')) != 0) {
|
|
1237 |
nvlist_t *parent;
|
|
1238 |
char tryname[ZFS_MAXNAMELEN];
|
|
1239 |
|
|
1240 |
parent = fsavl_find(local_avl,
|
|
1241 |
stream_parent_fromsnap_guid, NULL);
|
|
1242 |
/*
|
|
1243 |
* NB: parent might not be found if we used the
|
|
1244 |
* tosnap for stream_parent_fromsnap_guid,
|
|
1245 |
* because the parent is a newly-created fs;
|
|
1246 |
* we'll be able to rename it after we recv the
|
|
1247 |
* new fs.
|
|
1248 |
*/
|
|
1249 |
if (parent != NULL) {
|
|
1250 |
char *pname;
|
|
1251 |
|
|
1252 |
VERIFY(0 == nvlist_lookup_string(parent, "name",
|
|
1253 |
&pname));
|
|
1254 |
(void) snprintf(tryname, sizeof (tryname),
|
|
1255 |
"%s%s", pname, strrchr(stream_fsname, '/'));
|
|
1256 |
} else {
|
|
1257 |
tryname[0] = '\0';
|
|
1258 |
if (flags.verbose) {
|
|
1259 |
(void) printf("local fs %s new parent "
|
|
1260 |
"not found\n", fsname);
|
|
1261 |
}
|
|
1262 |
}
|
|
1263 |
|
|
1264 |
error = recv_rename(hdl, fsname, tryname,
|
|
1265 |
strlen(tofs)+1, newname, flags);
|
|
1266 |
if (error)
|
|
1267 |
needagain = B_TRUE;
|
|
1268 |
else
|
|
1269 |
progress = B_TRUE;
|
|
1270 |
}
|
|
1271 |
}
|
|
1272 |
|
|
1273 |
fsavl_destroy(local_avl);
|
|
1274 |
nvlist_free(local_nv);
|
|
1275 |
|
|
1276 |
if (needagain && progress) {
|
|
1277 |
/* do another pass to fix up temporary names */
|
|
1278 |
if (flags.verbose)
|
|
1279 |
(void) printf("another pass:\n");
|
|
1280 |
goto again;
|
|
1281 |
}
|
|
1282 |
|
|
1283 |
return (needagain);
|
|
1284 |
}
|
|
1285 |
|
|
1286 |
static int
|
|
1287 |
zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname,
|
|
1288 |
recvflags_t flags, dmu_replay_record_t *drr, zio_cksum_t *zc)
|
|
1289 |
{
|
|
1290 |
nvlist_t *stream_nv = NULL;
|
|
1291 |
avl_tree_t *stream_avl = NULL;
|
|
1292 |
char *fromsnap = NULL;
|
|
1293 |
char tofs[ZFS_MAXNAMELEN];
|
|
1294 |
char errbuf[1024];
|
|
1295 |
dmu_replay_record_t drre;
|
|
1296 |
int error;
|
|
1297 |
boolean_t anyerr = B_FALSE;
|
|
1298 |
|
|
1299 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
1300 |
"cannot receive"));
|
|
1301 |
|
|
1302 |
if (strchr(destname, '@')) {
|
|
1303 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1304 |
"can not specify snapshot name for multi-snapshot stream"));
|
|
1305 |
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
|
|
1306 |
}
|
|
1307 |
|
|
1308 |
assert(drr->drr_type == DRR_BEGIN);
|
|
1309 |
assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC);
|
|
1310 |
assert(drr->drr_u.drr_begin.drr_version == DMU_BACKUP_HEADER_VERSION);
|
|
1311 |
|
|
1312 |
/*
|
|
1313 |
* Read in the nvlist from the stream.
|
|
1314 |
*/
|
|
1315 |
if (drr->drr_payloadlen != 0) {
|
|
1316 |
if (!flags.isprefix) {
|
|
1317 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1318 |
"must use -d to receive replication "
|
|
1319 |
"(send -R) stream"));
|
|
1320 |
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
|
|
1321 |
}
|
|
1322 |
|
|
1323 |
error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen,
|
|
1324 |
&stream_nv, flags.byteswap, zc);
|
|
1325 |
if (error) {
|
|
1326 |
error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
|
|
1327 |
goto out;
|
|
1328 |
}
|
|
1329 |
}
|
|
1330 |
|
|
1331 |
/*
|
|
1332 |
* Read in the end record and verify checksum.
|
|
1333 |
*/
|
|
1334 |
if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre),
|
|
1335 |
flags.byteswap, NULL)))
|
|
1336 |
goto out;
|
|
1337 |
if (flags.byteswap) {
|
|
1338 |
drre.drr_type = BSWAP_32(drre.drr_type);
|
|
1339 |
drre.drr_u.drr_end.drr_checksum.zc_word[0] =
|
|
1340 |
BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]);
|
|
1341 |
drre.drr_u.drr_end.drr_checksum.zc_word[1] =
|
|
1342 |
BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]);
|
|
1343 |
drre.drr_u.drr_end.drr_checksum.zc_word[2] =
|
|
1344 |
BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]);
|
|
1345 |
drre.drr_u.drr_end.drr_checksum.zc_word[3] =
|
|
1346 |
BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]);
|
|
1347 |
}
|
|
1348 |
if (drre.drr_type != DRR_END) {
|
|
1349 |
error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
|
|
1350 |
goto out;
|
|
1351 |
}
|
|
1352 |
if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) {
|
|
1353 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1354 |
"incorrect header checksum"));
|
|
1355 |
error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
|
|
1356 |
goto out;
|
|
1357 |
}
|
|
1358 |
|
|
1359 |
(void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap);
|
|
1360 |
|
|
1361 |
if (drr->drr_payloadlen != 0) {
|
|
1362 |
nvlist_t *stream_fss;
|
|
1363 |
|
|
1364 |
VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss",
|
|
1365 |
&stream_fss));
|
|
1366 |
stream_avl = fsavl_create(stream_fss);
|
|
1367 |
|
|
1368 |
if (fromsnap != NULL) {
|
|
1369 |
(void) strlcpy(tofs, destname, ZFS_MAXNAMELEN);
|
|
1370 |
if (flags.isprefix) {
|
|
1371 |
int i = strcspn(drr->drr_u.drr_begin.drr_toname,
|
|
1372 |
"/@");
|
|
1373 |
/* zfs_receive_one() will create_parents() */
|
|
1374 |
(void) strlcat(tofs,
|
|
1375 |
&drr->drr_u.drr_begin.drr_toname[i],
|
|
1376 |
ZFS_MAXNAMELEN);
|
|
1377 |
*strchr(tofs, '@') = '\0';
|
|
1378 |
}
|
|
1379 |
anyerr |= recv_incremental_replication(hdl, tofs,
|
|
1380 |
flags, stream_nv, stream_avl);
|
|
1381 |
}
|
|
1382 |
}
|
|
1383 |
|
|
1384 |
|
|
1385 |
/* Finally, receive each contained stream */
|
|
1386 |
do {
|
|
1387 |
/*
|
|
1388 |
* we should figure out if it has a recoverable
|
|
1389 |
* error, in which case do a recv_skip() and drive on.
|
|
1390 |
* Note, if we fail due to already having this guid,
|
|
1391 |
* zfs_receive_one() will take care of it (ie,
|
|
1392 |
* recv_skip() and return 0).
|
|
1393 |
*/
|
|
1394 |
error = zfs_receive(hdl, destname, flags, fd, stream_avl);
|
|
1395 |
if (error == ENODATA) {
|
|
1396 |
error = 0;
|
|
1397 |
break;
|
|
1398 |
}
|
|
1399 |
anyerr |= error;
|
|
1400 |
} while (error == 0);
|
|
1401 |
|
|
1402 |
if (drr->drr_payloadlen != 0 && fromsnap != NULL) {
|
|
1403 |
/*
|
|
1404 |
* Now that we have the fs's they sent us, try the
|
|
1405 |
* renames again.
|
|
1406 |
*/
|
|
1407 |
anyerr |= recv_incremental_replication(hdl, tofs, flags,
|
|
1408 |
stream_nv, stream_avl);
|
|
1409 |
}
|
|
1410 |
|
|
1411 |
out:
|
|
1412 |
fsavl_destroy(stream_avl);
|
|
1413 |
if (stream_nv)
|
|
1414 |
nvlist_free(stream_nv);
|
|
1415 |
if (anyerr)
|
|
1416 |
error = -1;
|
|
1417 |
return (error);
|
|
1418 |
}
|
|
1419 |
|
|
1420 |
static int
|
|
1421 |
recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap)
|
|
1422 |
{
|
|
1423 |
dmu_replay_record_t *drr;
|
|
1424 |
void *buf = malloc(1<<20);
|
|
1425 |
|
|
1426 |
/* XXX would be great to use lseek if possible... */
|
|
1427 |
drr = buf;
|
|
1428 |
|
|
1429 |
while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t),
|
|
1430 |
byteswap, NULL) == 0) {
|
|
1431 |
if (byteswap)
|
|
1432 |
drr->drr_type = BSWAP_32(drr->drr_type);
|
|
1433 |
|
|
1434 |
switch (drr->drr_type) {
|
|
1435 |
case DRR_BEGIN:
|
|
1436 |
/* NB: not to be used on v2 stream packages */
|
|
1437 |
assert(drr->drr_payloadlen == 0);
|
|
1438 |
break;
|
|
1439 |
|
|
1440 |
case DRR_END:
|
|
1441 |
free(buf);
|
|
1442 |
return (0);
|
|
1443 |
|
|
1444 |
case DRR_OBJECT:
|
|
1445 |
if (byteswap) {
|
|
1446 |
drr->drr_u.drr_object.drr_bonuslen =
|
|
1447 |
BSWAP_32(drr->drr_u.drr_object.
|
|
1448 |
drr_bonuslen);
|
|
1449 |
}
|
|
1450 |
(void) recv_read(hdl, fd, buf,
|
|
1451 |
P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8),
|
|
1452 |
B_FALSE, NULL);
|
|
1453 |
break;
|
|
1454 |
|
|
1455 |
case DRR_WRITE:
|
|
1456 |
if (byteswap) {
|
|
1457 |
drr->drr_u.drr_write.drr_length =
|
|
1458 |
BSWAP_32(drr->drr_u.drr_write.drr_length);
|
|
1459 |
}
|
|
1460 |
(void) recv_read(hdl, fd, buf,
|
|
1461 |
drr->drr_u.drr_write.drr_length, B_FALSE, NULL);
|
|
1462 |
break;
|
|
1463 |
|
|
1464 |
case DRR_FREEOBJECTS:
|
|
1465 |
case DRR_FREE:
|
|
1466 |
break;
|
|
1467 |
|
|
1468 |
default:
|
|
1469 |
assert(!"invalid record type");
|
|
1470 |
}
|
|
1471 |
}
|
|
1472 |
|
|
1473 |
free(buf);
|
|
1474 |
return (-1);
|
|
1475 |
}
|
|
1476 |
|
|
1477 |
/*
|
|
1478 |
* Restores a backup of tosnap from the file descriptor specified by infd.
|
|
1479 |
*/
|
|
1480 |
static int
|
|
1481 |
zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
|
|
1482 |
recvflags_t flags, dmu_replay_record_t *drr,
|
|
1483 |
dmu_replay_record_t *drr_noswap, avl_tree_t *stream_avl)
|
|
1484 |
{
|
|
1485 |
zfs_cmd_t zc = { 0 };
|
|
1486 |
time_t begin_time;
|
|
1487 |
int ioctl_err, ioctl_errno, err, choplen;
|
|
1488 |
char *cp;
|
|
1489 |
struct drr_begin *drrb = &drr->drr_u.drr_begin;
|
|
1490 |
char errbuf[1024];
|
|
1491 |
char chopprefix[ZFS_MAXNAMELEN];
|
|
1492 |
boolean_t newfs = B_FALSE;
|
|
1493 |
boolean_t stream_wantsnewfs;
|
|
1494 |
uint64_t parent_snapguid = 0;
|
|
1495 |
prop_changelist_t *clp = NULL;
|
|
1496 |
|
|
1497 |
begin_time = time(NULL);
|
|
1498 |
|
|
1499 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
1500 |
"cannot receive"));
|
|
1501 |
|
|
1502 |
if (stream_avl != NULL) {
|
|
1503 |
nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid, NULL);
|
|
1504 |
nvlist_t *props;
|
|
1505 |
|
|
1506 |
(void) nvlist_lookup_uint64(fs, "parentfromsnap",
|
|
1507 |
&parent_snapguid);
|
|
1508 |
err = nvlist_lookup_nvlist(fs, "props", &props);
|
|
1509 |
if (err)
|
|
1510 |
VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0));
|
|
1511 |
if (flags.canmountoff) {
|
|
1512 |
VERIFY(0 == nvlist_add_uint64(props,
|
|
1513 |
zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0));
|
|
1514 |
}
|
|
1515 |
if (zcmd_write_src_nvlist(hdl, &zc, props) != 0)
|
|
1516 |
return (-1);
|
|
1517 |
if (err)
|
|
1518 |
nvlist_free(props);
|
|
1519 |
}
|
|
1520 |
|
|
1521 |
/*
|
|
1522 |
* Determine how much of the snapshot name stored in the stream
|
|
1523 |
* we are going to tack on to the name they specified on the
|
|
1524 |
* command line, and how much we are going to chop off.
|
|
1525 |
*
|
|
1526 |
* If they specified a snapshot, chop the entire name stored in
|
|
1527 |
* the stream.
|
|
1528 |
*/
|
|
1529 |
(void) strcpy(chopprefix, drrb->drr_toname);
|
|
1530 |
if (flags.isprefix) {
|
|
1531 |
/*
|
|
1532 |
* They specified a fs with -d, we want to tack on
|
|
1533 |
* everything but the pool name stored in the stream
|
|
1534 |
*/
|
|
1535 |
if (strchr(tosnap, '@')) {
|
|
1536 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
|
|
1537 |
"argument - snapshot not allowed with -d"));
|
|
1538 |
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
|
|
1539 |
}
|
|
1540 |
cp = strchr(chopprefix, '/');
|
|
1541 |
if (cp == NULL)
|
|
1542 |
cp = strchr(chopprefix, '@');
|
|
1543 |
*cp = '\0';
|
|
1544 |
} else if (strchr(tosnap, '@') == NULL) {
|
|
1545 |
/*
|
|
1546 |
* If they specified a filesystem without -d, we want to
|
|
1547 |
* tack on everything after the fs specified in the
|
|
1548 |
* first name from the stream.
|
|
1549 |
*/
|
|
1550 |
cp = strchr(chopprefix, '@');
|
|
1551 |
*cp = '\0';
|
|
1552 |
}
|
|
1553 |
choplen = strlen(chopprefix);
|
|
1554 |
|
|
1555 |
/*
|
|
1556 |
* Determine name of destination snapshot, store in zc_value.
|
|
1557 |
*/
|
|
1558 |
(void) strcpy(zc.zc_value, tosnap);
|
|
1559 |
(void) strncat(zc.zc_value, drrb->drr_toname+choplen,
|
|
1560 |
sizeof (zc.zc_value));
|
|
1561 |
if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT))
|
|
1562 |
return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
|
|
1563 |
|
|
1564 |
/*
|
|
1565 |
* Determine the name of the origin snapshot, store in zc_string.
|
|
1566 |
*/
|
|
1567 |
if (drrb->drr_flags & DRR_FLAG_CLONE) {
|
|
1568 |
if (guid_to_name(hdl, tosnap,
|
|
1569 |
drrb->drr_fromguid, zc.zc_string) != 0) {
|
|
1570 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1571 |
"local origin for clone %s does not exist"),
|
|
1572 |
zc.zc_value);
|
|
1573 |
return (zfs_error(hdl, EZFS_NOENT, errbuf));
|
|
1574 |
}
|
|
1575 |
if (flags.verbose)
|
|
1576 |
(void) printf("found clone origin %s\n", zc.zc_string);
|
|
1577 |
}
|
|
1578 |
|
|
1579 |
stream_wantsnewfs = (drrb->drr_fromguid == NULL ||
|
|
1580 |
(drrb->drr_flags & DRR_FLAG_CLONE));
|
|
1581 |
|
|
1582 |
if (stream_wantsnewfs) {
|
|
1583 |
/*
|
|
1584 |
* if the parent fs does not exist, look for it based on
|
|
1585 |
* the parent snap GUID
|
|
1586 |
*/
|
|
1587 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
1588 |
"cannot receive new filesystem stream"));
|
|
1589 |
|
|
1590 |
(void) strcpy(zc.zc_name, zc.zc_value);
|
|
1591 |
cp = strrchr(zc.zc_name, '/');
|
|
1592 |
if (cp)
|
|
1593 |
*cp = '\0';
|
|
1594 |
if (cp &&
|
|
1595 |
!zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
|
|
1596 |
char suffix[ZFS_MAXNAMELEN];
|
|
1597 |
(void) strcpy(suffix, strrchr(zc.zc_value, '/'));
|
|
1598 |
if (guid_to_name(hdl, tosnap, parent_snapguid,
|
|
1599 |
zc.zc_value) == 0) {
|
|
1600 |
*strchr(zc.zc_value, '@') = '\0';
|
|
1601 |
(void) strcat(zc.zc_value, suffix);
|
|
1602 |
}
|
|
1603 |
}
|
|
1604 |
} else {
|
|
1605 |
/*
|
|
1606 |
* if the fs does not exist, look for it based on the
|
|
1607 |
* fromsnap GUID
|
|
1608 |
*/
|
|
1609 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
1610 |
"cannot receive incremental stream"));
|
|
1611 |
|
|
1612 |
(void) strcpy(zc.zc_name, zc.zc_value);
|
|
1613 |
*strchr(zc.zc_name, '@') = '\0';
|
|
1614 |
|
|
1615 |
if (!zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
|
|
1616 |
char snap[ZFS_MAXNAMELEN];
|
|
1617 |
(void) strcpy(snap, strchr(zc.zc_value, '@'));
|
|
1618 |
if (guid_to_name(hdl, tosnap, drrb->drr_fromguid,
|
|
1619 |
zc.zc_value) == 0) {
|
|
1620 |
*strchr(zc.zc_value, '@') = '\0';
|
|
1621 |
(void) strcat(zc.zc_value, snap);
|
|
1622 |
}
|
|
1623 |
}
|
|
1624 |
}
|
|
1625 |
|
|
1626 |
(void) strcpy(zc.zc_name, zc.zc_value);
|
|
1627 |
*strchr(zc.zc_name, '@') = '\0';
|
|
1628 |
|
|
1629 |
if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
|
|
1630 |
zfs_handle_t *zhp;
|
|
1631 |
/*
|
|
1632 |
* Destination fs exists. Therefore this should either
|
|
1633 |
* be an incremental, or the stream specifies a new fs
|
|
1634 |
* (full stream or clone) and they want us to blow it
|
|
1635 |
* away (and have therefore specified -F and removed any
|
|
1636 |
* snapshots).
|
|
1637 |
*/
|
|
1638 |
|
|
1639 |
if (stream_wantsnewfs) {
|
|
1640 |
if (!flags.force) {
|
|
1641 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1642 |
"destination '%s' exists\n"
|
|
1643 |
"must specify -F to overwrite it"),
|
|
1644 |
zc.zc_name);
|
|
1645 |
return (zfs_error(hdl, EZFS_EXISTS, errbuf));
|
|
1646 |
}
|
|
1647 |
if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT,
|
|
1648 |
&zc) == 0) {
|
|
1649 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1650 |
"destination has snapshots (eg. %s)\n"
|
|
1651 |
"must destroy them to overwrite it"),
|
|
1652 |
zc.zc_name);
|
|
1653 |
return (zfs_error(hdl, EZFS_EXISTS, errbuf));
|
|
1654 |
}
|
|
1655 |
}
|
|
1656 |
|
|
1657 |
zhp = zfs_open(hdl, zc.zc_name,
|
|
1658 |
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
|
|
1659 |
if (zhp == NULL)
|
|
1660 |
return (-1);
|
|
1661 |
if (stream_wantsnewfs &&
|
|
1662 |
zhp->zfs_dmustats.dds_origin[0]) {
|
|
1663 |
zfs_close(zhp);
|
|
1664 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1665 |
"destination '%s' is a clone\n"
|
|
1666 |
"must destroy it to overwrite it"),
|
|
1667 |
zc.zc_name);
|
|
1668 |
return (zfs_error(hdl, EZFS_EXISTS, errbuf));
|
|
1669 |
}
|
|
1670 |
|
|
1671 |
if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
|
|
1672 |
stream_wantsnewfs) {
|
|
1673 |
/* We can't do online recv in this case */
|
|
1674 |
clp = changelist_gather(zhp, ZFS_PROP_NAME, 0);
|
|
1675 |
if (clp == NULL)
|
|
1676 |
return (-1);
|
|
1677 |
if (changelist_prefix(clp) != 0) {
|
|
1678 |
changelist_free(clp);
|
|
1679 |
return (-1);
|
|
1680 |
}
|
|
1681 |
}
|
|
1682 |
if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_VOLUME) {
|
|
1683 |
if (zvol_remove_link(hdl, zhp->zfs_name) != 0) {
|
|
1684 |
zfs_close(zhp);
|
|
1685 |
return (-1);
|
|
1686 |
}
|
|
1687 |
}
|
|
1688 |
zfs_close(zhp);
|
|
1689 |
} else {
|
|
1690 |
/*
|
|
1691 |
* Destination FS does not exist. Therefore we better
|
|
1692 |
* be creating a new filesystem (either from a full
|
|
1693 |
* backup, or a clone)
|
|
1694 |
*/
|
|
1695 |
|
|
1696 |
if (!stream_wantsnewfs) {
|
|
1697 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1698 |
"destination '%s' does not exist"), zc.zc_name);
|
|
1699 |
return (zfs_error(hdl, EZFS_NOENT, errbuf));
|
|
1700 |
}
|
|
1701 |
|
|
1702 |
/* Do the recvbackup ioctl to the fs's parent. */
|
|
1703 |
*strrchr(zc.zc_name, '/') = '\0';
|
|
1704 |
|
|
1705 |
if (flags.isprefix && !flags.dryrun) {
|
|
1706 |
err = create_parents(hdl, zc.zc_value, strlen(tosnap));
|
|
1707 |
if (err != 0) {
|
|
1708 |
return (zfs_error(hdl,
|
|
1709 |
EZFS_BADRESTORE, errbuf));
|
|
1710 |
}
|
|
1711 |
}
|
|
1712 |
|
|
1713 |
newfs = B_TRUE;
|
|
1714 |
}
|
|
1715 |
|
|
1716 |
zc.zc_begin_record = drr_noswap->drr_u.drr_begin;
|
|
1717 |
zc.zc_cookie = infd;
|
|
1718 |
zc.zc_guid = flags.force;
|
|
1719 |
if (flags.verbose) {
|
|
1720 |
(void) printf("%s %s stream of %s into %s\n",
|
|
1721 |
flags.dryrun ? "would receive" : "receiving",
|
|
1722 |
drrb->drr_fromguid ? "incremental" : "full",
|
|
1723 |
drrb->drr_toname, zc.zc_value);
|
|
1724 |
(void) fflush(stdout);
|
|
1725 |
}
|
|
1726 |
|
|
1727 |
if (flags.dryrun)
|
|
1728 |
return (recv_skip(hdl, infd, flags.byteswap));
|
|
1729 |
|
|
1730 |
err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc);
|
|
1731 |
ioctl_errno = errno;
|
|
1732 |
if (err && (ioctl_errno == ENOENT || ioctl_errno == ENODEV)) {
|
|
1733 |
/*
|
|
1734 |
* It may be that this snapshot already exists,
|
|
1735 |
* in which case we want to consume & ignore it
|
|
1736 |
* rather than failing.
|
|
1737 |
*/
|
|
1738 |
avl_tree_t *local_avl;
|
|
1739 |
nvlist_t *local_nv, *fs;
|
|
1740 |
char *cp = strchr(zc.zc_value, '@');
|
|
1741 |
|
|
1742 |
/*
|
|
1743 |
* XXX Do this faster by just iterating over snaps in
|
|
1744 |
* this fs. Also if zc_value does not exist, we will
|
|
1745 |
* get a strange "does not exist" error message.
|
|
1746 |
*/
|
|
1747 |
*cp = '\0';
|
|
1748 |
if (gather_nvlist(hdl, zc.zc_value, NULL, NULL,
|
|
1749 |
&local_nv, &local_avl) == 0) {
|
|
1750 |
*cp = '@';
|
|
1751 |
fs = fsavl_find(local_avl, drrb->drr_toguid, NULL);
|
|
1752 |
fsavl_destroy(local_avl);
|
|
1753 |
nvlist_free(local_nv);
|
|
1754 |
|
|
1755 |
if (fs != NULL) {
|
|
1756 |
if (flags.verbose) {
|
|
1757 |
(void) printf("snap %s already exists; "
|
|
1758 |
"ignoring\n", zc.zc_value);
|
|
1759 |
}
|
|
1760 |
ioctl_err = recv_skip(hdl, infd,
|
|
1761 |
flags.byteswap);
|
|
1762 |
}
|
|
1763 |
}
|
|
1764 |
*cp = '@';
|
|
1765 |
}
|
|
1766 |
|
|
1767 |
if (ioctl_err != 0) {
|
|
1768 |
switch (ioctl_errno) {
|
|
1769 |
case ENODEV:
|
|
1770 |
cp = strchr(zc.zc_value, '@');
|
|
1771 |
*cp = '\0';
|
|
1772 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1773 |
"most recent snapshot of %s does not\n"
|
|
1774 |
"match incremental source"), zc.zc_value);
|
|
1775 |
(void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
|
|
1776 |
*cp = '@';
|
|
1777 |
break;
|
|
1778 |
case ETXTBSY:
|
|
1779 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1780 |
"destination %s has been modified\n"
|
|
1781 |
"since most recent snapshot"), zc.zc_name);
|
|
1782 |
(void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
|
|
1783 |
break;
|
|
1784 |
case EEXIST:
|
|
1785 |
cp = strchr(zc.zc_value, '@');
|
|
1786 |
if (newfs) {
|
|
1787 |
/* it's the containing fs that exists */
|
|
1788 |
*cp = '\0';
|
|
1789 |
}
|
|
1790 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1791 |
"destination already exists"));
|
|
1792 |
(void) zfs_error_fmt(hdl, EZFS_EXISTS,
|
|
1793 |
dgettext(TEXT_DOMAIN, "cannot restore to %s"),
|
|
1794 |
zc.zc_value);
|
|
1795 |
*cp = '@';
|
|
1796 |
break;
|
|
1797 |
case EINVAL:
|
|
1798 |
(void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
|
|
1799 |
break;
|
|
1800 |
case ECKSUM:
|
|
1801 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1802 |
"invalid stream (checksum mismatch)"));
|
|
1803 |
(void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
|
|
1804 |
break;
|
|
1805 |
default:
|
|
1806 |
(void) zfs_standard_error(hdl, ioctl_errno, errbuf);
|
|
1807 |
}
|
|
1808 |
}
|
|
1809 |
|
|
1810 |
/*
|
|
1811 |
* Mount or recreate the /dev links for the target filesystem
|
|
1812 |
* (if created, or if we tore them down to do an incremental
|
|
1813 |
* restore), and the /dev links for the new snapshot (if
|
|
1814 |
* created). Also mount any children of the target filesystem
|
|
1815 |
* if we did an incremental receive.
|
|
1816 |
*/
|
|
1817 |
cp = strchr(zc.zc_value, '@');
|
|
1818 |
if (cp && (ioctl_err == 0 || !newfs)) {
|
|
1819 |
zfs_handle_t *h;
|
|
1820 |
|
|
1821 |
*cp = '\0';
|
|
1822 |
h = zfs_open(hdl, zc.zc_value,
|
|
1823 |
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
|
|
1824 |
*cp = '@';
|
|
1825 |
if (h) {
|
|
1826 |
if (h->zfs_type == ZFS_TYPE_VOLUME) {
|
|
1827 |
err = zvol_create_link(hdl, h->zfs_name);
|
|
1828 |
if (err == 0 && ioctl_err == 0)
|
|
1829 |
err = zvol_create_link(hdl,
|
|
1830 |
zc.zc_value);
|
|
1831 |
} else if (newfs) {
|
|
1832 |
err = zfs_mount(h, NULL, 0);
|
|
1833 |
}
|
|
1834 |
zfs_close(h);
|
|
1835 |
}
|
|
1836 |
}
|
|
1837 |
|
|
1838 |
if (clp) {
|
|
1839 |
err |= changelist_postfix(clp);
|
|
1840 |
changelist_free(clp);
|
|
1841 |
}
|
|
1842 |
|
|
1843 |
if (err || ioctl_err)
|
|
1844 |
return (-1);
|
|
1845 |
|
|
1846 |
if (flags.verbose) {
|
|
1847 |
char buf1[64];
|
|
1848 |
char buf2[64];
|
|
1849 |
uint64_t bytes = zc.zc_cookie;
|
|
1850 |
time_t delta = time(NULL) - begin_time;
|
|
1851 |
if (delta == 0)
|
|
1852 |
delta = 1;
|
|
1853 |
zfs_nicenum(bytes, buf1, sizeof (buf1));
|
|
1854 |
zfs_nicenum(bytes/delta, buf2, sizeof (buf1));
|
|
1855 |
|
|
1856 |
(void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
|
|
1857 |
buf1, delta, buf2);
|
|
1858 |
}
|
|
1859 |
|
|
1860 |
return (0);
|
|
1861 |
}
|
|
1862 |
|
|
1863 |
/*
|
|
1864 |
* Restores a backup of tosnap from the file descriptor specified by infd.
|
|
1865 |
*/
|
|
1866 |
int
|
|
1867 |
zfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags,
|
|
1868 |
int infd, avl_tree_t *stream_avl)
|
|
1869 |
{
|
|
1870 |
int err;
|
|
1871 |
dmu_replay_record_t drr, drr_noswap;
|
|
1872 |
struct drr_begin *drrb = &drr.drr_u.drr_begin;
|
|
1873 |
char errbuf[1024];
|
|
1874 |
zio_cksum_t zcksum = { 0 };
|
|
1875 |
|
|
1876 |
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
|
|
1877 |
"cannot receive"));
|
|
1878 |
|
|
1879 |
if (flags.isprefix &&
|
|
1880 |
!zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) {
|
|
1881 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs "
|
|
1882 |
"(%s) does not exist"), tosnap);
|
|
1883 |
return (zfs_error(hdl, EZFS_NOENT, errbuf));
|
|
1884 |
}
|
|
1885 |
|
|
1886 |
/* read in the BEGIN record */
|
|
1887 |
if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE,
|
|
1888 |
&zcksum)))
|
|
1889 |
return (err);
|
|
1890 |
|
|
1891 |
if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) {
|
|
1892 |
/* It's the double end record at the end of a package */
|
|
1893 |
return (ENODATA);
|
|
1894 |
}
|
|
1895 |
|
|
1896 |
/* the kernel needs the non-byteswapped begin record */
|
|
1897 |
drr_noswap = drr;
|
|
1898 |
|
5446
|
1899 |
flags.byteswap = B_FALSE;
|
5367
|
1900 |
if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
|
|
1901 |
/*
|
|
1902 |
* We computed the checksum in the wrong byteorder in
|
|
1903 |
* recv_read() above; do it again correctly.
|
|
1904 |
*/
|
|
1905 |
bzero(&zcksum, sizeof (zio_cksum_t));
|
|
1906 |
fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum);
|
|
1907 |
flags.byteswap = B_TRUE;
|
|
1908 |
|
|
1909 |
drr.drr_type = BSWAP_32(drr.drr_type);
|
|
1910 |
drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen);
|
|
1911 |
drrb->drr_magic = BSWAP_64(drrb->drr_magic);
|
|
1912 |
drrb->drr_version = BSWAP_64(drrb->drr_version);
|
|
1913 |
drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
|
|
1914 |
drrb->drr_type = BSWAP_32(drrb->drr_type);
|
|
1915 |
drrb->drr_flags = BSWAP_32(drrb->drr_flags);
|
|
1916 |
drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
|
|
1917 |
drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
|
|
1918 |
}
|
|
1919 |
|
|
1920 |
if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) {
|
|
1921 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
|
|
1922 |
"stream (bad magic number)"));
|
|
1923 |
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
|
|
1924 |
}
|
|
1925 |
|
|
1926 |
if (strchr(drrb->drr_toname, '@') == NULL) {
|
|
1927 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
|
|
1928 |
"stream (bad snapshot name)"));
|
|
1929 |
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
|
|
1930 |
}
|
|
1931 |
|
|
1932 |
if (drrb->drr_version == DMU_BACKUP_STREAM_VERSION) {
|
|
1933 |
return (zfs_receive_one(hdl, infd, tosnap, flags,
|
|
1934 |
&drr, &drr_noswap, stream_avl));
|
|
1935 |
} else if (drrb->drr_version == DMU_BACKUP_HEADER_VERSION) {
|
|
1936 |
return (zfs_receive_package(hdl, infd, tosnap, flags,
|
|
1937 |
&drr, &zcksum));
|
|
1938 |
} else {
|
|
1939 |
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
|
|
1940 |
"stream is unsupported version %llu"),
|
|
1941 |
drrb->drr_version);
|
|
1942 |
return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
|
|
1943 |
}
|
|
1944 |
}
|