debian/patches/pve/0029-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 | 224 ++++++++++++++++++++++++++++++++++++++++++++++++++
  11  2 files changed, 228 insertions(+)
  12  create mode 100644 pbs-restore.c
  13
  14 diff --git a/meson.build b/meson.build
  15 index 76fcb23299..9476ccbe07 100644
  16 --- a/meson.build
  17 +++ b/meson.build
  18 @@ -3365,6 +3365,10 @@ 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..4d3f925a1b
  32 --- /dev/null
  33 +++ b/pbs-restore.c
  34 @@ -0,0 +1,224 @@
  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-common.h"
  54 +#include "qemu/module.h"
  55 +#include "qemu/error-report.h"
  56 +#include "qemu/main-loop.h"
  57 +#include "qemu/cutils.h"
  58 +#include "qapi/error.h"
  59 +#include "qapi/qmp/qdict.h"
  60 +#include "sysemu/block-backend.h"
  61 +
  62 +#include <proxmox-backup-qemu.h>
  63 +
  64 +static void help(void)
  65 +{
  66 +    const char *help_msg =
  67 +        "usage: pbs-restore [--repository <repo>] snapshot archive-name target [command options]\n"
  68 +        ;
  69 +
  70 +    printf("%s", help_msg);
  71 +    exit(1);
  72 +}
  73 +
  74 +typedef struct CallbackData {
  75 +    BlockBackend *target;
  76 +    uint64_t last_offset;
  77 +    bool skip_zero;
  78 +} CallbackData;
  79 +
  80 +static int write_callback(
  81 +    void *callback_data_ptr,
  82 +    uint64_t offset,
  83 +    const unsigned char *data,
  84 +    uint64_t data_len)
  85 +{
  86 +    int res = -1;
  87 +
  88 +    CallbackData *callback_data = (CallbackData *)callback_data_ptr;
  89 +
  90 +    uint64_t last_offset = callback_data->last_offset;
  91 +    if (offset > last_offset) callback_data->last_offset = offset;
  92 +
  93 +    if (data == NULL) {
  94 +        if (callback_data->skip_zero && offset > last_offset) {
  95 +            return 0;
  96 +        }
  97 +        res = blk_pwrite_zeroes(callback_data->target, offset, data_len, 0);
  98 +    } else {
  99 +        res = blk_pwrite(callback_data->target, offset, data, data_len, 0);
 100 +    }
 101 +
 102 +    if (res < 0) {
 103 +        fprintf(stderr, "blk_pwrite failed at offset %ld length %ld (%d) - %s\n", offset, data_len, res, strerror(-res));
 104 +        return res;
 105 +    }
 106 +
 107 +    return 0;
 108 +}
 109 +
 110 +int main(int argc, char **argv)
 111 +{
 112 +    Error *main_loop_err = NULL;
 113 +    const char *format = "raw";
 114 +    const char *repository = NULL;
 115 +    const char *keyfile = NULL;
 116 +    int verbose = false;
 117 +    bool skip_zero = false;
 118 +
 119 +    error_init(argv[0]);
 120 +
 121 +    for (;;) {
 122 +        static const struct option long_options[] = {
 123 +            {"help", no_argument, 0, 'h'},
 124 +            {"skip-zero", no_argument, 0, 'S'},
 125 +            {"verbose", no_argument, 0, 'v'},
 126 +            {"format", required_argument, 0, 'f'},
 127 +            {"repository", required_argument, 0, 'r'},
 128 +            {"keyfile", required_argument, 0, 'k'},
 129 +            {0, 0, 0, 0}
 130 +        };
 131 +        int c = getopt_long(argc, argv, "hvf:r:k:", long_options, NULL);
 132 +        if (c == -1) {
 133 +            break;
 134 +        }
 135 +        switch (c) {
 136 +            case ':':
 137 +                fprintf(stderr, "missing argument for option '%s'\n", argv[optind - 1]);
 138 +                return -1;
 139 +            case '?':
 140 +                fprintf(stderr, "unrecognized option '%s'\n", argv[optind - 1]);
 141 +                return -1;
 142 +            case 'f':
 143 +                format = g_strdup(argv[optind - 1]);
 144 +                break;
 145 +            case 'r':
 146 +                repository = g_strdup(argv[optind - 1]);
 147 +                break;
 148 +            case 'k':
 149 +                keyfile = g_strdup(argv[optind - 1]);
 150 +                break;
 151 +            case 'v':
 152 +                verbose = true;
 153 +                break;
 154 +            case 'S':
 155 +                skip_zero = true;
 156 +                break;
 157 +            case 'h':
 158 +                help();
 159 +                return 0;
 160 +        }
 161 +    }
 162 +
 163 +    if (optind >= argc - 2) {
 164 +        fprintf(stderr, "missing arguments\n");
 165 +        help();
 166 +        return -1;
 167 +    }
 168 +
 169 +    if (repository == NULL) {
 170 +        repository = getenv("PBS_REPOSITORY");
 171 +    }
 172 +
 173 +    if (repository == NULL) {
 174 +        fprintf(stderr, "no repository specified\n");
 175 +        help();
 176 +        return -1;
 177 +    }
 178 +
 179 +    char *snapshot = argv[optind++];
 180 +    char *archive_name = argv[optind++];
 181 +    char *target = argv[optind++];
 182 +
 183 +    const char *password = getenv("PBS_PASSWORD");
 184 +    const char *fingerprint = getenv("PBS_FINGERPRINT");
 185 +    const char *key_password = getenv("PBS_ENCRYPTION_PASSWORD");
 186 +
 187 +    if (qemu_init_main_loop(&main_loop_err)) {
 188 +        g_error("%s", error_get_pretty(main_loop_err));
 189 +    }
 190 +
 191 +    bdrv_init();
 192 +    module_call_init(MODULE_INIT_QOM);
 193 +
 194 +    if (verbose) {
 195 +        fprintf(stderr, "connecting to repository '%s'\n", repository);
 196 +    }
 197 +    char *pbs_error = NULL;
 198 +    ProxmoxRestoreHandle *conn = proxmox_restore_new(
 199 +        repository, snapshot, password, keyfile, key_password, fingerprint, &pbs_error);
 200 +    if (conn == NULL) {
 201 +        fprintf(stderr, "restore failed: %s\n", pbs_error);
 202 +        return -1;
 203 +    }
 204 +
 205 +    int res = proxmox_restore_connect(conn, &pbs_error);
 206 +    if (res < 0 || pbs_error) {
 207 +        fprintf(stderr, "restore failed (connection error): %s\n", pbs_error);
 208 +        return -1;
 209 +    }
 210 +
 211 +    QDict *options = qdict_new();
 212 +
 213 +    if (format) {
 214 +        qdict_put_str(options, "driver", format);
 215 +    }
 216 +
 217 +
 218 +    if (verbose) {
 219 +        fprintf(stderr, "open block backend for target '%s'\n", target);
 220 +    }
 221 +    Error *local_err = NULL;
 222 +    int flags = BDRV_O_RDWR;
 223 +    BlockBackend *blk = blk_new_open(target, NULL, options, flags, &local_err);
 224 +    if (!blk) {
 225 +        fprintf(stderr, "%s\n", error_get_pretty(local_err));
 226 +        return -1;
 227 +    }
 228 +
 229 +    CallbackData *callback_data = calloc(sizeof(CallbackData), 1);
 230 +
 231 +    callback_data->target = blk;
 232 +    callback_data->skip_zero = skip_zero;
 233 +    callback_data->last_offset = 0;
 234 +
 235 +    // blk_set_enable_write_cache(blk, !writethrough);
 236 +
 237 +    if (verbose) {
 238 +        fprintf(stderr, "starting to restore snapshot '%s'\n", snapshot);
 239 +        fflush(stderr); // ensure we do not get printed after the progress log
 240 +    }
 241 +    res = proxmox_restore_image(
 242 +        conn,
 243 +        archive_name,
 244 +        write_callback,
 245 +        callback_data,
 246 +        &pbs_error,
 247 +        verbose);
 248 +
 249 +    proxmox_restore_disconnect(conn);
 250 +    blk_unref(blk);
 251 +
 252 +    if (res < 0) {
 253 +        fprintf(stderr, "restore failed: %s\n", pbs_error);
 254 +        return -1;
 255 +    }
 256 +
 257 +    return 0;
 258 +}