debian/patches/pve/0030-PVE-Backup-pbs-restore-new-command-to-restore-from-p.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Dietmar Maurer <dietmar@proxmox.com>
   3 Date: Mon, 6 Apr 2020 12:17:01 +0200
   4 Subject: [PATCH] PVE-Backup: pbs-restore - new command to restore from proxmox
   5  backup server
   6
   7 Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
   8 ---
   9  meson.build   |   4 +
  10  pbs-restore.c | 223 ++++++++++++++++++++++++++++++++++++++++++++++++++
  11  2 files changed, 227 insertions(+)
  12  create mode 100644 pbs-restore.c
  13
  14 diff --git a/meson.build b/meson.build
  15 index 782756162c..63ea813a9a 100644
  16 --- a/meson.build
  17 +++ b/meson.build
  18 @@ -3602,6 +3602,10 @@ if have_tools
  19    vma = executable('vma', files('vma.c', 'vma-reader.c') + genh,
  20                     dependencies: [authz, block, crypto, io, qom], install: true)
  21
  22 +  pbs_restore = executable('pbs-restore', files('pbs-restore.c') + genh,
  23 +                  dependencies: [authz, block, crypto, io, qom,
  24 +                    libproxmox_backup_qemu], install: true)
  25 +
  26    subdir('storage-daemon')
  27    subdir('contrib/rdmacm-mux')
  28    subdir('contrib/elf2dmp')
  29 diff --git a/pbs-restore.c b/pbs-restore.c
  30 new file mode 100644
  31 index 0000000000..2f834cf42e
  32 --- /dev/null
  33 +++ b/pbs-restore.c
  34 @@ -0,0 +1,223 @@
  35 +/*
  36 + * Qemu image restore helper for Proxmox Backup
  37 + *
  38 + * Copyright (C) 2019 Proxmox Server Solutions
  39 + *
  40 + * Authors:
  41 + *  Dietmar Maurer (dietmar@proxmox.com)
  42 + *
  43 + * This work is licensed under the terms of the GNU GPL, version 2 or later.
  44 + * See the COPYING file in the top-level directory.
  45 + *
  46 + */
  47 +
  48 +#include "qemu/osdep.h"
  49 +#include <glib.h>
  50 +#include <getopt.h>
  51 +#include <string.h>
  52 +
  53 +#include "qemu/module.h"
  54 +#include "qemu/error-report.h"
  55 +#include "qemu/main-loop.h"
  56 +#include "qemu/cutils.h"
  57 +#include "qapi/error.h"
  58 +#include "qapi/qmp/qdict.h"
  59 +#include "sysemu/block-backend.h"
  60 +
  61 +#include <proxmox-backup-qemu.h>
  62 +
  63 +static void help(void)
  64 +{
  65 +    const char *help_msg =
  66 +        "usage: pbs-restore [--repository <repo>] snapshot archive-name target [command options]\n"
  67 +        ;
  68 +
  69 +    printf("%s", help_msg);
  70 +    exit(1);
  71 +}
  72 +
  73 +typedef struct CallbackData {
  74 +    BlockBackend *target;
  75 +    uint64_t last_offset;
  76 +    bool skip_zero;
  77 +} CallbackData;
  78 +
  79 +static int write_callback(
  80 +    void *callback_data_ptr,
  81 +    uint64_t offset,
  82 +    const unsigned char *data,
  83 +    uint64_t data_len)
  84 +{
  85 +    int res = -1;
  86 +
  87 +    CallbackData *callback_data = (CallbackData *)callback_data_ptr;
  88 +
  89 +    uint64_t last_offset = callback_data->last_offset;
  90 +    if (offset > last_offset) callback_data->last_offset = offset;
  91 +
  92 +    if (data == NULL) {
  93 +        if (callback_data->skip_zero && offset > last_offset) {
  94 +            return 0;
  95 +        }
  96 +        res = blk_pwrite_zeroes(callback_data->target, offset, data_len, 0);
  97 +    } else {
  98 +        res = blk_pwrite(callback_data->target, offset, data_len, data, 0);
  99 +    }
 100 +
 101 +    if (res < 0) {
 102 +        fprintf(stderr, "blk_pwrite failed at offset %ld length %ld (%d) - %s\n", offset, data_len, res, strerror(-res));
 103 +        return res;
 104 +    }
 105 +
 106 +    return 0;
 107 +}
 108 +
 109 +int main(int argc, char **argv)
 110 +{
 111 +    Error *main_loop_err = NULL;
 112 +    const char *format = "raw";
 113 +    const char *repository = NULL;
 114 +    const char *keyfile = NULL;
 115 +    int verbose = false;
 116 +    bool skip_zero = false;
 117 +
 118 +    error_init(argv[0]);
 119 +
 120 +    for (;;) {
 121 +        static const struct option long_options[] = {
 122 +            {"help", no_argument, 0, 'h'},
 123 +            {"skip-zero", no_argument, 0, 'S'},
 124 +            {"verbose", no_argument, 0, 'v'},
 125 +            {"format", required_argument, 0, 'f'},
 126 +            {"repository", required_argument, 0, 'r'},
 127 +            {"keyfile", required_argument, 0, 'k'},
 128 +            {0, 0, 0, 0}
 129 +        };
 130 +        int c = getopt_long(argc, argv, "hvf:r:k:", long_options, NULL);
 131 +        if (c == -1) {
 132 +            break;
 133 +        }
 134 +        switch (c) {
 135 +            case ':':
 136 +                fprintf(stderr, "missing argument for option '%s'\n", argv[optind - 1]);
 137 +                return -1;
 138 +            case '?':
 139 +                fprintf(stderr, "unrecognized option '%s'\n", argv[optind - 1]);
 140 +                return -1;
 141 +            case 'f':
 142 +                format = g_strdup(argv[optind - 1]);
 143 +                break;
 144 +            case 'r':
 145 +                repository = g_strdup(argv[optind - 1]);
 146 +                break;
 147 +            case 'k':
 148 +                keyfile = g_strdup(argv[optind - 1]);
 149 +                break;
 150 +            case 'v':
 151 +                verbose = true;
 152 +                break;
 153 +            case 'S':
 154 +                skip_zero = true;
 155 +                break;
 156 +            case 'h':
 157 +                help();
 158 +                return 0;
 159 +        }
 160 +    }
 161 +
 162 +    if (optind >= argc - 2) {
 163 +        fprintf(stderr, "missing arguments\n");
 164 +        help();
 165 +        return -1;
 166 +    }
 167 +
 168 +    if (repository == NULL) {
 169 +        repository = getenv("PBS_REPOSITORY");
 170 +    }
 171 +
 172 +    if (repository == NULL) {
 173 +        fprintf(stderr, "no repository specified\n");
 174 +        help();
 175 +        return -1;
 176 +    }
 177 +
 178 +    char *snapshot = argv[optind++];
 179 +    char *archive_name = argv[optind++];
 180 +    char *target = argv[optind++];
 181 +
 182 +    const char *password = getenv("PBS_PASSWORD");
 183 +    const char *fingerprint = getenv("PBS_FINGERPRINT");
 184 +    const char *key_password = getenv("PBS_ENCRYPTION_PASSWORD");
 185 +
 186 +    if (qemu_init_main_loop(&main_loop_err)) {
 187 +        g_error("%s", error_get_pretty(main_loop_err));
 188 +    }
 189 +
 190 +    bdrv_init();
 191 +    module_call_init(MODULE_INIT_QOM);
 192 +
 193 +    if (verbose) {
 194 +        fprintf(stderr, "connecting to repository '%s'\n", repository);
 195 +    }
 196 +    char *pbs_error = NULL;
 197 +    ProxmoxRestoreHandle *conn = proxmox_restore_new(
 198 +        repository, snapshot, password, keyfile, key_password, fingerprint, &pbs_error);
 199 +    if (conn == NULL) {
 200 +        fprintf(stderr, "restore failed: %s\n", pbs_error);
 201 +        return -1;
 202 +    }
 203 +
 204 +    int res = proxmox_restore_connect(conn, &pbs_error);
 205 +    if (res < 0 || pbs_error) {
 206 +        fprintf(stderr, "restore failed (connection error): %s\n", pbs_error);
 207 +        return -1;
 208 +    }
 209 +
 210 +    QDict *options = qdict_new();
 211 +
 212 +    if (format) {
 213 +        qdict_put_str(options, "driver", format);
 214 +    }
 215 +
 216 +
 217 +    if (verbose) {
 218 +        fprintf(stderr, "open block backend for target '%s'\n", target);
 219 +    }
 220 +    Error *local_err = NULL;
 221 +    int flags = BDRV_O_RDWR;
 222 +    BlockBackend *blk = blk_new_open(target, NULL, options, flags, &local_err);
 223 +    if (!blk) {
 224 +        fprintf(stderr, "%s\n", error_get_pretty(local_err));
 225 +        return -1;
 226 +    }
 227 +
 228 +    CallbackData *callback_data = calloc(sizeof(CallbackData), 1);
 229 +
 230 +    callback_data->target = blk;
 231 +    callback_data->skip_zero = skip_zero;
 232 +    callback_data->last_offset = 0;
 233 +
 234 +    // blk_set_enable_write_cache(blk, !writethrough);
 235 +
 236 +    if (verbose) {
 237 +        fprintf(stderr, "starting to restore snapshot '%s'\n", snapshot);
 238 +        fflush(stderr); // ensure we do not get printed after the progress log
 239 +    }
 240 +    res = proxmox_restore_image(
 241 +        conn,
 242 +        archive_name,
 243 +        write_callback,
 244 +        callback_data,
 245 +        &pbs_error,
 246 +        verbose);
 247 +
 248 +    proxmox_restore_disconnect(conn);
 249 +    blk_unref(blk);
 250 +
 251 +    if (res < 0) {
 252 +        fprintf(stderr, "restore failed: %s\n", pbs_error);
 253 +        return -1;
 254 +    }
 255 +
 256 +    return 0;
 257 +}