misc/e2image.c

   1 /*
   2  * e2image.c --- Program which writes an image file backing up
   3  * critical metadata for the filesystem.
   4  *
   5  * Copyright 2000, 2001 by Theodore Ts'o.
   6  *
   7  * %Begin-Header%
   8  * This file may be redistributed under the terms of the GNU Public
   9  * License.
  10  * %End-Header%
  11  */
  12
  13 #define _LARGEFILE_SOURCE
  14 #define _LARGEFILE64_SOURCE
  15
  16 #include "config.h"
  17 #include <fcntl.h>
  18 #include <grp.h>
  19 #ifdef HAVE_GETOPT_H
  20 #include <getopt.h>
  21 #else
  22 extern char *optarg;
  23 extern int optind;
  24 #endif
  25 #include <pwd.h>
  26 #include <stdio.h>
  27 #ifdef HAVE_STDLIB_H
  28 #include <stdlib.h>
  29 #endif
  30 #include <string.h>
  31 #include <time.h>
  32 #include <unistd.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <sys/stat.h>
  36 #include <sys/types.h>
  37 #include <assert.h>
  38
  39 #include "ext2fs/ext2_fs.h"
  40 #include "ext2fs/ext2fs.h"
  41 #include "et/com_err.h"
  42 #include "uuid/uuid.h"
  43 #include "e2p/e2p.h"
  44 #include "ext2fs/e2image.h"
  45 #include "ext2fs/qcow2.h"
  46
  47 #include "../version.h"
  48 #include "nls-enable.h"
  49
  50 #define QCOW_OFLAG_COPIED     (1LL << 63)
  51
  52
  53 const char * program_name = "e2image";
  54 char * device_name = NULL;
  55
  56 static void lseek_error_and_exit(int errnum)
  57 {
  58         perror("seek");
  59         exit(1);
  60 }
  61
  62 static blk64_t align_offset(blk64_t offset, int n)
  63 {
  64         return (offset + n - 1) & ~(n - 1);
  65 }
  66
  67 static int get_bits_from_size(size_t size)
  68 {
  69         int res = 0;
  70
  71         if (size == 0)
  72                 return -1;
  73
  74         while (size != 1) {
  75                 /* Not a power of two */
  76                 if (size & 1)
  77                         return -1;
  78
  79                 size >>= 1;
  80                 res++;
  81         }
  82         return res;
  83 }
  84
  85 static void usage(void)
  86 {
  87         fprintf(stderr, _("Usage: %s [-rsIQ] device image_file\n"),
  88                 program_name);
  89         exit (1);
  90 }
  91
  92 static void generic_write(int fd, void *buf, int blocksize, blk64_t block)
  93 {
  94         int count, free_buf = 0;
  95         errcode_t err;
  96
  97         if (!blocksize)
  98                 return;
  99
 100         if (!buf) {
 101                 free_buf = 1;
 102                 err = ext2fs_get_arrayzero(1, blocksize, &buf);
 103                 if (err) {
 104                         com_err(program_name, err, "while allocating buffer");
 105                         exit(1);
 106                 }
 107         }
 108
 109         count = write(fd, buf, blocksize);
 110         if (count != blocksize) {
 111                 if (count == -1)
 112                         err = errno;
 113                 else
 114                         err = 0;
 115
 116                 if (block)
 117                         com_err(program_name, err, "error writing block %llu",
 118                                 block);
 119                 else
 120                         com_err(program_name, err, "error in write()");
 121
 122                 exit(1);
 123         }
 124         if (free_buf)
 125                 ext2fs_free_mem(&buf);
 126 }
 127
 128 static void write_header(int fd, void *hdr, int hdr_size, int wrt_size)
 129 {
 130         char *header_buf;
 131         int ret;
 132
 133         /* Sanity check */
 134         if (hdr_size > wrt_size) {
 135                 fprintf(stderr, _("Error: header size is bigger than "
 136                                   "wrt_size\n"));
 137         }
 138
 139         ret = ext2fs_get_mem(wrt_size, &header_buf);
 140         if (ret) {
 141                 fputs(_("Couldn't allocate header buffer\n"), stderr);
 142                 exit(1);
 143         }
 144
 145         if (ext2fs_llseek(fd, 0, SEEK_SET) < 0) {
 146                 perror("ext2fs_llseek while writing header");
 147                 exit(1);
 148         }
 149         memset(header_buf, 0, wrt_size);
 150
 151         if (hdr)
 152                 memcpy(header_buf, hdr, hdr_size);
 153
 154         generic_write(fd, header_buf, wrt_size, 0);
 155
 156         ext2fs_free_mem(&header_buf);
 157 }
 158
 159 static void write_image_file(ext2_filsys fs, int fd)
 160 {
 161         struct ext2_image_hdr   hdr;
 162         struct stat             st;
 163         errcode_t               retval;
 164
 165         write_header(fd, NULL, fs->blocksize, fs->blocksize);
 166         memset(&hdr, 0, sizeof(struct ext2_image_hdr));
 167
 168         hdr.offset_super = ext2fs_llseek(fd, 0, SEEK_CUR);
 169         retval = ext2fs_image_super_write(fs, fd, 0);
 170         if (retval) {
 171                 com_err(program_name, retval, _("while writing superblock"));
 172                 exit(1);
 173         }
 174
 175         hdr.offset_inode = ext2fs_llseek(fd, 0, SEEK_CUR);
 176         retval = ext2fs_image_inode_write(fs, fd,
 177                                   (fd != 1) ? IMAGER_FLAG_SPARSEWRITE : 0);
 178         if (retval) {
 179                 com_err(program_name, retval, _("while writing inode table"));
 180                 exit(1);
 181         }
 182
 183         hdr.offset_blockmap = ext2fs_llseek(fd, 0, SEEK_CUR);
 184         retval = ext2fs_image_bitmap_write(fs, fd, 0);
 185         if (retval) {
 186                 com_err(program_name, retval, _("while writing block bitmap"));
 187                 exit(1);
 188         }
 189
 190         hdr.offset_inodemap = ext2fs_llseek(fd, 0, SEEK_CUR);
 191         retval = ext2fs_image_bitmap_write(fs, fd, IMAGER_FLAG_INODEMAP);
 192         if (retval) {
 193                 com_err(program_name, retval, _("while writing inode bitmap"));
 194                 exit(1);
 195         }
 196
 197         hdr.magic_number = EXT2_ET_MAGIC_E2IMAGE;
 198         strcpy(hdr.magic_descriptor, "Ext2 Image 1.0");
 199         gethostname(hdr.fs_hostname, sizeof(hdr.fs_hostname));
 200         strncpy(hdr.fs_device_name, device_name, sizeof(hdr.fs_device_name)-1);
 201         hdr.fs_device_name[sizeof(hdr.fs_device_name) - 1] = 0;
 202         hdr.fs_blocksize = fs->blocksize;
 203
 204         if (stat(device_name, &st) == 0)
 205                 hdr.fs_device = st.st_rdev;
 206
 207         if (fstat(fd, &st) == 0) {
 208                 hdr.image_device = st.st_dev;
 209                 hdr.image_inode = st.st_ino;
 210         }
 211         memcpy(hdr.fs_uuid, fs->super->s_uuid, sizeof(hdr.fs_uuid));
 212
 213         hdr.image_time = time(0);
 214         write_header(fd, &hdr, fs->blocksize, fs->blocksize);
 215 }
 216
 217 /*
 218  * These set of functions are used to write a RAW image file.
 219  */
 220 ext2fs_block_bitmap meta_block_map;
 221 ext2fs_block_bitmap scramble_block_map; /* Directory blocks to be scrambled */
 222 blk64_t meta_blocks_count;
 223
 224 struct process_block_struct {
 225         ext2_ino_t      ino;
 226         int             is_dir;
 227 };
 228
 229 /*
 230  * These subroutines short circuits ext2fs_get_blocks and
 231  * ext2fs_check_directory; we use them since we already have the inode
 232  * structure, so there's no point in letting the ext2fs library read
 233  * the inode again.
 234  */
 235 static ino_t stashed_ino = 0;
 236 static struct ext2_inode *stashed_inode;
 237
 238 static errcode_t meta_get_blocks(ext2_filsys fs EXT2FS_ATTR((unused)),
 239                                  ext2_ino_t ino,
 240                                  blk_t *blocks)
 241 {
 242         int     i;
 243
 244         if ((ino != stashed_ino) || !stashed_inode)
 245                 return EXT2_ET_CALLBACK_NOTHANDLED;
 246
 247         for (i=0; i < EXT2_N_BLOCKS; i++)
 248                 blocks[i] = stashed_inode->i_block[i];
 249         return 0;
 250 }
 251
 252 static errcode_t meta_check_directory(ext2_filsys fs EXT2FS_ATTR((unused)),
 253                                       ext2_ino_t ino)
 254 {
 255         if ((ino != stashed_ino) || !stashed_inode)
 256                 return EXT2_ET_CALLBACK_NOTHANDLED;
 257
 258         if (!LINUX_S_ISDIR(stashed_inode->i_mode))
 259                 return EXT2_ET_NO_DIRECTORY;
 260         return 0;
 261 }
 262
 263 static errcode_t meta_read_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 264                                  ext2_ino_t ino,
 265                                  struct ext2_inode *inode)
 266 {
 267         if ((ino != stashed_ino) || !stashed_inode)
 268                 return EXT2_ET_CALLBACK_NOTHANDLED;
 269         *inode = *stashed_inode;
 270         return 0;
 271 }
 272
 273 static void use_inode_shortcuts(ext2_filsys fs, int bool)
 274 {
 275         if (bool) {
 276                 fs->get_blocks = meta_get_blocks;
 277                 fs->check_directory = meta_check_directory;
 278                 fs->read_inode = meta_read_inode;
 279                 stashed_ino = 0;
 280         } else {
 281                 fs->get_blocks = 0;
 282                 fs->check_directory = 0;
 283                 fs->read_inode = 0;
 284         }
 285 }
 286
 287 static int process_dir_block(ext2_filsys fs EXT2FS_ATTR((unused)),
 288                              blk64_t *block_nr,
 289                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 290                              blk64_t ref_block EXT2FS_ATTR((unused)),
 291                              int ref_offset EXT2FS_ATTR((unused)),
 292                              void *priv_data EXT2FS_ATTR((unused)))
 293 {
 294         struct process_block_struct *p;
 295
 296         p = (struct process_block_struct *) priv_data;
 297
 298         ext2fs_mark_block_bitmap2(meta_block_map, *block_nr);
 299         meta_blocks_count++;
 300         if (scramble_block_map && p->is_dir && blockcnt >= 0)
 301                 ext2fs_mark_block_bitmap2(scramble_block_map, *block_nr);
 302         return 0;
 303 }
 304
 305 static int process_file_block(ext2_filsys fs EXT2FS_ATTR((unused)),
 306                               blk64_t *block_nr,
 307                               e2_blkcnt_t blockcnt,
 308                               blk64_t ref_block EXT2FS_ATTR((unused)),
 309                               int ref_offset EXT2FS_ATTR((unused)),
 310                               void *priv_data EXT2FS_ATTR((unused)))
 311 {
 312         if (blockcnt < 0) {
 313                 ext2fs_mark_block_bitmap2(meta_block_map, *block_nr);
 314                 meta_blocks_count++;
 315         }
 316         return 0;
 317 }
 318
 319 static void mark_table_blocks(ext2_filsys fs)
 320 {
 321         blk64_t first_block, b;
 322         unsigned int    i,j;
 323
 324         first_block = fs->super->s_first_data_block;
 325         /*
 326          * Mark primary superblock
 327          */
 328         ext2fs_mark_block_bitmap2(meta_block_map, first_block);
 329         meta_blocks_count++;
 330
 331         /*
 332          * Mark the primary superblock descriptors
 333          */
 334         for (j = 0; j < fs->desc_blocks; j++) {
 335                 ext2fs_mark_block_bitmap2(meta_block_map,
 336                          ext2fs_descriptor_block_loc2(fs, first_block, j));
 337         }
 338         meta_blocks_count += fs->desc_blocks;
 339
 340         for (i = 0; i < fs->group_desc_count; i++) {
 341                 /*
 342                  * Mark the blocks used for the inode table
 343                  */
 344                 if (ext2fs_inode_table_loc(fs, i)) {
 345                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
 346                              j < (unsigned) fs->inode_blocks_per_group;
 347                              j++, b++)
 348                                 ext2fs_mark_block_bitmap2(meta_block_map, b);
 349                         meta_blocks_count += fs->inode_blocks_per_group;
 350                 }
 351
 352                 /*
 353                  * Mark block used for the block bitmap
 354                  */
 355                 if (ext2fs_block_bitmap_loc(fs, i)) {
 356                         ext2fs_mark_block_bitmap2(meta_block_map,
 357                                      ext2fs_block_bitmap_loc(fs, i));
 358                         meta_blocks_count++;
 359                 }
 360
 361                 /*
 362                  * Mark block used for the inode bitmap
 363                  */
 364                 if (ext2fs_inode_bitmap_loc(fs, i)) {
 365                         ext2fs_mark_block_bitmap2(meta_block_map,
 366                                  ext2fs_inode_bitmap_loc(fs, i));
 367                         meta_blocks_count++;
 368                 }
 369         }
 370 }
 371
 372 /*
 373  * This function returns 1 if the specified block is all zeros
 374  */
 375 static int check_zero_block(char *buf, int blocksize)
 376 {
 377         char    *cp = buf;
 378         int     left = blocksize;
 379
 380         while (left > 0) {
 381                 if (*cp++)
 382                         return 0;
 383                 left--;
 384         }
 385         return 1;
 386 }
 387
 388 static void write_block(int fd, char *buf, int sparse_offset,
 389                         int blocksize, blk64_t block)
 390 {
 391         ext2_loff_t     ret = 0;
 392
 393         if (sparse_offset)
 394                 ret = ext2fs_llseek(fd, sparse_offset, SEEK_CUR);
 395
 396         if (ret < 0)
 397                 lseek_error_and_exit(errno);
 398         generic_write(fd, buf, blocksize, block);
 399 }
 400
 401 int name_id[256];
 402
 403 #define EXT4_MAX_REC_LEN                ((1<<16)-1)
 404
 405 static void scramble_dir_block(ext2_filsys fs, blk64_t blk, char *buf)
 406 {
 407         char *p, *end, *cp;
 408         struct ext2_dir_entry_2 *dirent;
 409         unsigned int rec_len;
 410         int id, len;
 411
 412         end = buf + fs->blocksize;
 413         for (p = buf; p < end-8; p += rec_len) {
 414                 dirent = (struct ext2_dir_entry_2 *) p;
 415                 rec_len = dirent->rec_len;
 416 #ifdef WORDS_BIGENDIAN
 417                 rec_len = ext2fs_swab16(rec_len);
 418 #endif
 419                 if (rec_len == EXT4_MAX_REC_LEN || rec_len == 0)
 420                         rec_len = fs->blocksize;
 421                 else
 422                         rec_len = (rec_len & 65532) | ((rec_len & 3) << 16);
 423 #if 0
 424                 printf("rec_len = %d, name_len = %d\n", rec_len, dirent->name_len);
 425 #endif
 426                 if (rec_len < 8 || (rec_len % 4) ||
 427                     (p+rec_len > end)) {
 428                         printf("Corrupt directory block %lu: "
 429                                "bad rec_len (%d)\n", (unsigned long) blk,
 430                                rec_len);
 431                         rec_len = end - p;
 432                         (void) ext2fs_set_rec_len(fs, rec_len,
 433                                         (struct ext2_dir_entry *) dirent);
 434 #ifdef WORDS_BIGENDIAN
 435                         dirent->rec_len = ext2fs_swab16(dirent->rec_len);
 436 #endif
 437                         continue;
 438                 }
 439                 if (dirent->name_len + 8 > rec_len) {
 440                         printf("Corrupt directory block %lu: "
 441                                "bad name_len (%d)\n", (unsigned long) blk,
 442                                dirent->name_len);
 443                         dirent->name_len = rec_len - 8;
 444                         continue;
 445                 }
 446                 cp = p+8;
 447                 len = rec_len - dirent->name_len - 8;
 448                 if (len > 0)
 449                         memset(cp+dirent->name_len, 0, len);
 450                 if (dirent->name_len==1 && cp[0] == '.')
 451                         continue;
 452                 if (dirent->name_len==2 && cp[0] == '.' && cp[1] == '.')
 453                         continue;
 454
 455                 memset(cp, 'A', dirent->name_len);
 456                 len = dirent->name_len;
 457                 id = name_id[len]++;
 458                 while ((len > 0) && (id > 0)) {
 459                         *cp += id % 26;
 460                         id = id / 26;
 461                         cp++;
 462                         len--;
 463                 }
 464         }
 465 }
 466
 467 static void output_meta_data_blocks(ext2_filsys fs, int fd)
 468 {
 469         errcode_t       retval;
 470         blk64_t         blk;
 471         char            *buf, *zero_buf;
 472         int             sparse = 0;
 473
 474         retval = ext2fs_get_mem(fs->blocksize, &buf);
 475         if (retval) {
 476                 com_err(program_name, retval, "while allocating buffer");
 477                 exit(1);
 478         }
 479         retval = ext2fs_get_memzero(fs->blocksize, &zero_buf);
 480         if (retval) {
 481                 com_err(program_name, retval, "while allocating buffer");
 482                 exit(1);
 483         }
 484         for (blk = 0; blk < ext2fs_blocks_count(fs->super); blk++) {
 485                 if ((blk >= fs->super->s_first_data_block) &&
 486                     ext2fs_test_block_bitmap2(meta_block_map, blk)) {
 487                         retval = io_channel_read_blk64(fs->io, blk, 1, buf);
 488                         if (retval) {
 489                                 com_err(program_name, retval,
 490                                         "error reading block %llu", blk);
 491                         }
 492                         if (scramble_block_map &&
 493                             ext2fs_test_block_bitmap2(scramble_block_map, blk))
 494                                 scramble_dir_block(fs, blk, buf);
 495                         if ((fd != 1) && check_zero_block(buf, fs->blocksize))
 496                                 goto sparse_write;
 497                         write_block(fd, buf, sparse, fs->blocksize, blk);
 498                         sparse = 0;
 499                 } else {
 500                 sparse_write:
 501                         if (fd == 1) {
 502                                 write_block(fd, zero_buf, 0,
 503                                             fs->blocksize, blk);
 504                                 continue;
 505                         }
 506                         sparse += fs->blocksize;
 507                         if (sparse >= 1024*1024) {
 508
 509                                 write_block(fd, 0, sparse, 0, 0);
 510                                 sparse = 0;
 511                         }
 512                 }
 513         }
 514         if (sparse)
 515                 write_block(fd, zero_buf, sparse-1, 1, -1);
 516         ext2fs_free_mem(&zero_buf);
 517         ext2fs_free_mem(&buf);
 518 }
 519
 520 static void init_l1_table(struct ext2_super_block *sb,
 521                           struct ext2_qcow2_image *image)
 522 {
 523         __u64 *l1_table;
 524         errcode_t ret;
 525
 526         ret = ext2fs_get_arrayzero(image->l1_size, sizeof(__u64), &l1_table);
 527         if (ret) {
 528                 com_err(program_name, ret, "while allocating l1 table");
 529                 exit(1);
 530         }
 531
 532         image->l1_table = l1_table;
 533 }
 534
 535 static void init_l2_cache(struct ext2_qcow2_image *image)
 536 {
 537         unsigned int count, i;
 538         struct ext2_qcow2_l2_cache *cache;
 539         struct ext2_qcow2_l2_table *table;
 540         errcode_t ret;
 541
 542         ret = ext2fs_get_arrayzero(1, sizeof(struct ext2_qcow2_l2_cache),
 543                                    &cache);
 544         if (ret)
 545                 goto alloc_err;
 546
 547         count = (image->l1_size > L2_CACHE_PREALLOC) ? L2_CACHE_PREALLOC :
 548                  image->l1_size;
 549
 550         cache->count = count;
 551         cache->free = count;
 552         cache->next_offset = image->l2_offset;
 553
 554         for (i = 0; i < count; i++) {
 555                 ret = ext2fs_get_arrayzero(1,
 556                                 sizeof(struct ext2_qcow2_l2_table), &table);
 557                 if (ret)
 558                         goto alloc_err;
 559
 560                 ret = ext2fs_get_arrayzero(image->l2_size,
 561                                                    sizeof(__u64), &table->data);
 562                 if (ret)
 563                         goto alloc_err;
 564
 565                 table->next = cache->free_head;
 566                 cache->free_head = table;
 567         }
 568
 569         image->l2_cache = cache;
 570         return;
 571
 572 alloc_err:
 573         com_err(program_name, ret, "while allocating l2 cache");
 574         exit(1);
 575 }
 576
 577 static void put_l2_cache(struct ext2_qcow2_image *image)
 578 {
 579         struct ext2_qcow2_l2_cache *cache = image->l2_cache;
 580         struct ext2_qcow2_l2_table *tmp, *table;
 581
 582         if (!cache)
 583                 return;
 584
 585         table = cache->free_head;
 586         cache->free_head = NULL;
 587 again:
 588         while (table) {
 589                 tmp = table;
 590                 table = table->next;
 591                 ext2fs_free_mem(&tmp->data);
 592                 ext2fs_free_mem(&tmp);
 593         }
 594
 595         if (cache->free != cache->count) {
 596                 fprintf(stderr, "Warning: There are still tables in the "
 597                                 "cache while putting the cache, data will "
 598                                 "be lost so the image may not be valid.\n");
 599                 table = cache->used_head;
 600                 cache->used_head = NULL;
 601                 goto again;
 602         }
 603
 604         ext2fs_free_mem(&cache);
 605 }
 606
 607 static int init_refcount(struct ext2_qcow2_image *img, blk64_t table_offset)
 608 {
 609         struct  ext2_qcow2_refcount     *ref;
 610         blk64_t table_clusters;
 611         errcode_t ret;
 612
 613         ref = &(img->refcount);
 614
 615         /*
 616          * One refcount block addresses 2048 clusters, one refcount table
 617          * addresses cluster/sizeof(__u64) refcount blocks, and we need
 618          * to address meta_blocks_count clusters + qcow2 metadata clusters
 619          * in the worst case.
 620          */
 621         table_clusters = meta_blocks_count + (table_offset >>
 622                                               img->cluster_bits);
 623         table_clusters >>= (img->cluster_bits + 6 - 1);
 624         table_clusters = (table_clusters == 0) ? 1 : table_clusters;
 625
 626         ref->refcount_table_offset = table_offset;
 627         ref->refcount_table_clusters = table_clusters;
 628         ref->refcount_table_index = 0;
 629         ref->refcount_block_index = 0;
 630
 631         /* Allocate refcount table */
 632         ret = ext2fs_get_arrayzero(ref->refcount_table_clusters,
 633                                    img->cluster_size, &ref->refcount_table);
 634         if (ret)
 635                 return ret;
 636
 637         /* Allocate refcount block */
 638         ret = ext2fs_get_arrayzero(1, img->cluster_size, &ref->refcount_block);
 639         if (ret)
 640                 ext2fs_free_mem(&ref->refcount_table);
 641
 642         return ret;
 643 }
 644
 645 static int initialize_qcow2_image(int fd, ext2_filsys fs,
 646                             struct ext2_qcow2_image *image)
 647 {
 648         struct ext2_qcow2_hdr *header;
 649         blk64_t total_size, offset;
 650         int shift, l2_bits, header_size, l1_size, ret;
 651         int cluster_bits = get_bits_from_size(fs->blocksize);
 652         struct ext2_super_block *sb = fs->super;
 653
 654         /* Allocate header */
 655         ret = ext2fs_get_memzero(sizeof(struct ext2_qcow2_hdr), &header);
 656         if (ret)
 657                 return ret;
 658
 659         total_size = ext2fs_blocks_count(sb) << cluster_bits;
 660         image->cluster_size = fs->blocksize;
 661         image->l2_size = 1 << (cluster_bits - 3);
 662         image->cluster_bits = cluster_bits;
 663         image->fd = fd;
 664
 665         header->magic = ext2fs_cpu_to_be32(QCOW_MAGIC);
 666         header->version = ext2fs_cpu_to_be32(QCOW_VERSION);
 667         header->size = ext2fs_cpu_to_be64(total_size);
 668         header->cluster_bits = ext2fs_cpu_to_be32(cluster_bits);
 669
 670         header_size = (sizeof(struct ext2_qcow2_hdr) + 7) & ~7;
 671         offset = align_offset(header_size, image->cluster_size);
 672
 673         header->l1_table_offset = ext2fs_cpu_to_be64(offset);
 674         image->l1_offset = offset;
 675
 676         l2_bits = cluster_bits - 3;
 677         shift = cluster_bits + l2_bits;
 678         l1_size = ((total_size + (1LL << shift) - 1) >> shift);
 679         header->l1_size = ext2fs_cpu_to_be32(l1_size);
 680         image->l1_size = l1_size;
 681
 682         /* Make space for L1 table */
 683         offset += align_offset(l1_size * sizeof(blk64_t), image->cluster_size);
 684
 685         /* Initialize refcounting */
 686         ret = init_refcount(image, offset);
 687         if (ret) {
 688                 ext2fs_free_mem(&header);
 689                 return ret;
 690         }
 691         header->refcount_table_offset = ext2fs_cpu_to_be64(offset);
 692         header->refcount_table_clusters =
 693                 ext2fs_cpu_to_be32(image->refcount.refcount_table_clusters);
 694         offset += image->cluster_size;
 695         offset += image->refcount.refcount_table_clusters <<
 696                 image->cluster_bits;
 697
 698         /* Make space for L2 tables */
 699         image->l2_offset = offset;
 700         offset += image->cluster_size;
 701
 702         /* Make space for first refcount block */
 703         image->refcount.refcount_block_offset = offset;
 704
 705         image->hdr = header;
 706         /* Initialize l1 and l2 tables */
 707         init_l1_table(sb, image);
 708         init_l2_cache(image);
 709
 710         return 0;
 711 }
 712
 713 static void free_qcow2_image(struct ext2_qcow2_image *img)
 714 {
 715         if (!img)
 716                 return;
 717
 718         if (img->hdr)
 719                 ext2fs_free_mem(&img->hdr);
 720
 721         if (img->l1_table)
 722                 ext2fs_free_mem(&img->l1_table);
 723
 724         if (img->refcount.refcount_table)
 725                 ext2fs_free_mem(&img->refcount.refcount_table);
 726         if (img->refcount.refcount_block)
 727                 ext2fs_free_mem(&img->refcount.refcount_block);
 728
 729         put_l2_cache(img);
 730
 731         ext2fs_free_mem(&img);
 732 }
 733
 734 /**
 735  * Put table from used list (used_head) into free list (free_head).
 736  * l2_table is used to return pointer to the next used table (used_head).
 737  */
 738 static void put_used_table(struct ext2_qcow2_image *img,
 739                           struct ext2_qcow2_l2_table **l2_table)
 740 {
 741         struct ext2_qcow2_l2_cache *cache = img->l2_cache;
 742         struct ext2_qcow2_l2_table *table;
 743
 744         table = cache->used_head;
 745         cache->used_head = table->next;
 746
 747         assert(table);
 748         if (!table->next)
 749                 cache->used_tail = NULL;
 750
 751         /* Clean the table for case we will need to use it again */
 752         memset(table->data, 0, img->cluster_size);
 753         table->next = cache->free_head;
 754         cache->free_head = table;
 755
 756         cache->free++;
 757
 758         *l2_table = cache->used_head;
 759 }
 760
 761 static void flush_l2_cache(struct ext2_qcow2_image *image)
 762 {
 763         blk64_t seek = 0;
 764         ext2_loff_t offset;
 765         struct ext2_qcow2_l2_cache *cache = image->l2_cache;
 766         struct ext2_qcow2_l2_table *table = cache->used_head;
 767         int fd = image->fd;
 768
 769         /* Store current position */
 770         if ((offset = ext2fs_llseek(fd, 0, SEEK_CUR)) < 0)
 771                 lseek_error_and_exit(errno);
 772
 773         assert(table);
 774         while (cache->free < cache->count) {
 775                 if (seek != table->offset) {
 776                         if (ext2fs_llseek(fd, table->offset, SEEK_SET) < 0)
 777                                 lseek_error_and_exit(errno);
 778                         seek = table->offset;
 779                 }
 780
 781                 generic_write(fd, (char *)table->data, image->cluster_size , 0);
 782                 put_used_table(image, &table);
 783                 seek += image->cluster_size;
 784         }
 785
 786         /* Restore previous position */
 787         if (ext2fs_llseek(fd, offset, SEEK_SET) < 0)
 788                 lseek_error_and_exit(errno);
 789 }
 790
 791 /**
 792  * Get first free table (from free_head) and put it into tail of used list
 793  * (to used_tail).
 794  * l2_table is used to return pointer to moved table.
 795  * Returns 1 if the cache is full, 0 otherwise.
 796  */
 797 static void get_free_table(struct ext2_qcow2_image *image,
 798                           struct ext2_qcow2_l2_table **l2_table)
 799 {
 800         struct ext2_qcow2_l2_table *table;
 801         struct ext2_qcow2_l2_cache *cache = image->l2_cache;
 802
 803         if (0 == cache->free)
 804                 flush_l2_cache(image);
 805
 806         table = cache->free_head;
 807         assert(table);
 808         cache->free_head = table->next;
 809
 810         if (cache->used_tail)
 811                 cache->used_tail->next = table;
 812         else
 813                 /* First item in the used list */
 814                 cache->used_head = table;
 815
 816         cache->used_tail = table;
 817         cache->free--;
 818
 819         *l2_table = table;
 820 }
 821
 822 static int add_l2_item(struct ext2_qcow2_image *img, blk64_t blk,
 823                        blk64_t data, blk64_t next)
 824 {
 825         struct ext2_qcow2_l2_cache *cache = img->l2_cache;
 826         struct ext2_qcow2_l2_table *table = cache->used_tail;
 827         blk64_t l1_index = blk / img->l2_size;
 828         blk64_t l2_index = blk & (img->l2_size - 1);
 829         int ret = 0;
 830
 831         /*
 832          * Need to create new table if it does not exist,
 833          * or if it is full
 834          */
 835         if (!table || (table->l1_index != l1_index)) {
 836                 get_free_table(img, &table);
 837                 table->l1_index = l1_index;
 838                 table->offset = cache->next_offset;
 839                 cache->next_offset = next;
 840                 img->l1_table[l1_index] =
 841                         ext2fs_cpu_to_be64(table->offset | QCOW_OFLAG_COPIED);
 842                 ret++;
 843         }
 844
 845         table->data[l2_index] = ext2fs_cpu_to_be64(data | QCOW_OFLAG_COPIED);
 846         return ret;
 847 }
 848
 849 static int update_refcount(int fd, struct ext2_qcow2_image *img,
 850                            blk64_t offset, blk64_t rfblk_pos)
 851 {
 852         struct  ext2_qcow2_refcount     *ref;
 853         __u32   table_index;
 854         int ret = 0;
 855
 856         ref = &(img->refcount);
 857         table_index = offset >> (2 * img->cluster_bits - 1);
 858
 859         /*
 860          * Need to create new refcount block when the offset addresses
 861          * another item in the refcount table
 862          */
 863         if (table_index != ref->refcount_table_index) {
 864
 865                 if (ext2fs_llseek(fd, ref->refcount_block_offset, SEEK_SET) < 0)
 866                         lseek_error_and_exit(errno);
 867
 868                 generic_write(fd, (char *)ref->refcount_block,
 869                               img->cluster_size, 0);
 870                 memset(ref->refcount_block, 0, img->cluster_size);
 871
 872                 ref->refcount_table[ref->refcount_table_index] =
 873                         ext2fs_cpu_to_be64(ref->refcount_block_offset);
 874                 ref->refcount_block_offset = rfblk_pos;
 875                 ref->refcount_block_index = 0;
 876                 ref->refcount_table_index = table_index;
 877                 ret++;
 878         }
 879
 880         /*
 881          * We are relying on the fact that we are creating the qcow2
 882          * image sequentially, hence we will always allocate refcount
 883          * block items sequentialy.
 884          */
 885         ref->refcount_block[ref->refcount_block_index] = ext2fs_cpu_to_be16(1);
 886         ref->refcount_block_index++;
 887         return ret;
 888 }
 889
 890 static int sync_refcount(int fd, struct ext2_qcow2_image *img)
 891 {
 892         struct  ext2_qcow2_refcount     *ref;
 893
 894         ref = &(img->refcount);
 895
 896         ref->refcount_table[ref->refcount_table_index] =
 897                 ext2fs_cpu_to_be64(ref->refcount_block_offset);
 898         if (ext2fs_llseek(fd, ref->refcount_table_offset, SEEK_SET) < 0)
 899                 lseek_error_and_exit(errno);
 900         generic_write(fd, (char *)ref->refcount_table,
 901                 ref->refcount_table_clusters << img->cluster_bits, 0);
 902
 903         if (ext2fs_llseek(fd, ref->refcount_block_offset, SEEK_SET) < 0)
 904                 lseek_error_and_exit(errno);
 905         generic_write(fd, (char *)ref->refcount_block, img->cluster_size, 0);
 906         return 0;
 907 }
 908
 909 static void output_qcow2_meta_data_blocks(ext2_filsys fs, int fd)
 910 {
 911         errcode_t               retval;
 912         blk64_t                 blk, offset, size, end;
 913         char                    *buf;
 914         struct ext2_qcow2_image *img;
 915         unsigned int            header_size;
 916
 917         /* allocate  struct ext2_qcow2_image */
 918         retval = ext2fs_get_mem(sizeof(struct ext2_qcow2_image), &img);
 919         if (retval) {
 920                 com_err(program_name, retval,
 921                         "while allocating ext2_qcow2_image");
 922                 exit(1);
 923         }
 924
 925         retval = initialize_qcow2_image(fd, fs, img);
 926         if (retval) {
 927                 com_err(program_name, retval,
 928                         "while initializing ext2_qcow2_image");
 929                 exit(1);
 930         }
 931         header_size = align_offset(sizeof(struct ext2_qcow2_hdr),
 932                                    img->cluster_size);
 933         write_header(fd, img->hdr, sizeof(struct ext2_qcow2_hdr), header_size);
 934
 935         /* Refcount all qcow2 related metadata up to refcount_block_offset */
 936         end = img->refcount.refcount_block_offset;
 937         if (ext2fs_llseek(fd, end, SEEK_SET) < 0)
 938                 lseek_error_and_exit(errno);
 939         blk = end + img->cluster_size;
 940         for (offset = 0; offset <= end; offset += img->cluster_size) {
 941                 if (update_refcount(fd, img, offset, blk)) {
 942                         blk += img->cluster_size;
 943                         /*
 944                          * If we create new refcount block, we need to refcount
 945                          * it as well.
 946                          */
 947                         end += img->cluster_size;
 948                 }
 949         }
 950         if (ext2fs_llseek(fd, offset, SEEK_SET) < 0)
 951                 lseek_error_and_exit(errno);
 952
 953         retval = ext2fs_get_mem(fs->blocksize, &buf);
 954         if (retval) {
 955                 com_err(program_name, retval, "while allocating buffer");
 956                 exit(1);
 957         }
 958         /* Write qcow2 data blocks */
 959         for (blk = 0; blk < ext2fs_blocks_count(fs->super); blk++) {
 960                 if ((blk >= fs->super->s_first_data_block) &&
 961                     ext2fs_test_block_bitmap2(meta_block_map, blk)) {
 962                         retval = io_channel_read_blk64(fs->io, blk, 1, buf);
 963                         if (retval) {
 964                                 com_err(program_name, retval,
 965                                         "error reading block %llu", blk);
 966                                 continue;
 967                         }
 968                         if (scramble_block_map &&
 969                             ext2fs_test_block_bitmap2(scramble_block_map, blk))
 970                                 scramble_dir_block(fs, blk, buf);
 971                         if (check_zero_block(buf, fs->blocksize))
 972                                 continue;
 973
 974                         if (update_refcount(fd, img, offset, offset)) {
 975                                 /* Make space for another refcount block */
 976                                 offset += img->cluster_size;
 977                                 if (ext2fs_llseek(fd, offset, SEEK_SET) < 0)
 978                                         lseek_error_and_exit(errno);
 979                                 /*
 980                                  * We have created the new refcount block, this
 981                                  * means that we need to refcount it as well.
 982                                  * So the previous update_refcount refcounted
 983                                  * the block itself and now we are going to
 984                                  * create refcount for data. New refcount
 985                                  * block should not be created!
 986                                  */
 987                                 if (update_refcount(fd, img, offset, offset)) {
 988                                         fprintf(stderr, "Programming error: "
 989                                                 "multiple sequential refcount "
 990                                                 "blocks created!\n");
 991                                         exit(1);
 992                                 }
 993                         }
 994
 995                         generic_write(fd, buf, fs->blocksize, 0);
 996
 997                         if (add_l2_item(img, blk, offset,
 998                                         offset + img->cluster_size)) {
 999                                 offset += img->cluster_size;
1000                                 if (update_refcount(fd, img, offset,
1001                                         offset + img->cluster_size)) {
1002                                         offset += img->cluster_size;
1003                                         if (update_refcount(fd, img, offset,
1004                                                             offset)) {
1005                                                 fprintf(stderr,
1006                         "Programming error: multiple sequential refcount "
1007                         "blocks created!\n");
1008                                                 exit(1);
1009                                         }
1010                                 }
1011                                 offset += img->cluster_size;
1012                                 if (ext2fs_llseek(fd, offset, SEEK_SET) < 0)
1013                                         lseek_error_and_exit(errno);
1014                                 continue;
1015                         }
1016
1017                         offset += img->cluster_size;
1018                 }
1019         }
1020         update_refcount(fd, img, offset, offset);
1021         flush_l2_cache(img);
1022         sync_refcount(fd, img);
1023
1024         /* Write l1_table*/
1025         if (ext2fs_llseek(fd, img->l1_offset, SEEK_SET) < 0)
1026                 lseek_error_and_exit(errno);
1027         size = img->l1_size * sizeof(__u64);
1028         generic_write(fd, (char *)img->l1_table, size, 0);
1029
1030         ext2fs_free_mem(&buf);
1031         free_qcow2_image(img);
1032 }
1033
1034 static void write_raw_image_file(ext2_filsys fs, int fd, int type, int flags)
1035 {
1036         struct process_block_struct     pb;
1037         struct ext2_inode               inode;
1038         ext2_inode_scan                 scan;
1039         ext2_ino_t                      ino;
1040         errcode_t                       retval;
1041         char *                          block_buf;
1042
1043         meta_blocks_count = 0;
1044         retval = ext2fs_allocate_block_bitmap(fs, "in-use block map",
1045                                               &meta_block_map);
1046         if (retval) {
1047                 com_err(program_name, retval, "while allocating block bitmap");
1048                 exit(1);
1049         }
1050
1051         if (flags & E2IMAGE_SCRAMBLE_FLAG) {
1052                 retval = ext2fs_allocate_block_bitmap(fs, "scramble block map",
1053                                                       &scramble_block_map);
1054                 if (retval) {
1055                         com_err(program_name, retval,
1056                                 "while allocating scramble block bitmap");
1057                         exit(1);
1058                 }
1059         }
1060
1061         mark_table_blocks(fs);
1062
1063         retval = ext2fs_open_inode_scan(fs, 0, &scan);
1064         if (retval) {
1065                 com_err(program_name, retval, _("while opening inode scan"));
1066                 exit(1);
1067         }
1068
1069         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
1070         if (retval) {
1071                 com_err(program_name, 0, "Can't allocate block buffer");
1072                 exit(1);
1073         }
1074
1075         use_inode_shortcuts(fs, 1);
1076         stashed_inode = &inode;
1077         while (1) {
1078                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
1079                 if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
1080                         continue;
1081                 if (retval) {
1082                         com_err(program_name, retval,
1083                                 _("while getting next inode"));
1084                         exit(1);
1085                 }
1086                 if (ino == 0)
1087                         break;
1088                 if (!inode.i_links_count)
1089                         continue;
1090                 if (ext2fs_file_acl_block(fs, &inode)) {
1091                         ext2fs_mark_block_bitmap2(meta_block_map,
1092                                         ext2fs_file_acl_block(fs, &inode));
1093                         meta_blocks_count++;
1094                 }
1095                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
1096                         continue;
1097
1098                 stashed_ino = ino;
1099                 pb.ino = ino;
1100                 pb.is_dir = LINUX_S_ISDIR(inode.i_mode);
1101                 if (LINUX_S_ISDIR(inode.i_mode) ||
1102                     (LINUX_S_ISLNK(inode.i_mode) &&
1103                      ext2fs_inode_has_valid_blocks2(fs, &inode)) ||
1104                     ino == fs->super->s_journal_inum) {
1105                         retval = ext2fs_block_iterate3(fs, ino,
1106                                         BLOCK_FLAG_READ_ONLY, block_buf,
1107                                         process_dir_block, &pb);
1108                         if (retval) {
1109                                 com_err(program_name, retval,
1110                                         "while iterating over inode %u",
1111                                         ino);
1112                                 exit(1);
1113                         }
1114                 } else {
1115                         if ((inode.i_flags & EXT4_EXTENTS_FL) ||
1116                             inode.i_block[EXT2_IND_BLOCK] ||
1117                             inode.i_block[EXT2_DIND_BLOCK] ||
1118                             inode.i_block[EXT2_TIND_BLOCK]) {
1119                                 retval = ext2fs_block_iterate3(fs,
1120                                        ino, BLOCK_FLAG_READ_ONLY, block_buf,
1121                                        process_file_block, &pb);
1122                                 if (retval) {
1123                                         com_err(program_name, retval,
1124                                         "while iterating over inode %u", ino);
1125                                         exit(1);
1126                                 }
1127                         }
1128                 }
1129         }
1130         use_inode_shortcuts(fs, 0);
1131
1132         if (type & E2IMAGE_QCOW2)
1133                 output_qcow2_meta_data_blocks(fs, fd);
1134         else
1135                 output_meta_data_blocks(fs, fd);
1136
1137         ext2fs_free_mem(&block_buf);
1138         ext2fs_close_inode_scan(scan);
1139         ext2fs_free_block_bitmap(meta_block_map);
1140         if (type & E2IMAGE_SCRAMBLE_FLAG)
1141                 ext2fs_free_block_bitmap(scramble_block_map);
1142 }
1143
1144 static void install_image(char *device, char *image_fn, int type)
1145 {
1146         errcode_t retval;
1147         ext2_filsys fs;
1148         int open_flag = EXT2_FLAG_IMAGE_FILE;
1149         int fd = 0;
1150         io_manager      io_ptr;
1151         io_channel      io;
1152
1153         if (type) {
1154                 com_err(program_name, 0, "Raw and qcow2 images cannot"
1155                         "be installed");
1156                 exit(1);
1157         }
1158
1159 #ifdef CONFIG_TESTIO_DEBUG
1160         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1161                 io_ptr = test_io_manager;
1162                 test_io_backing_manager = unix_io_manager;
1163         } else
1164 #endif
1165                 io_ptr = unix_io_manager;
1166
1167         retval = ext2fs_open (image_fn, open_flag, 0, 0,
1168                               io_ptr, &fs);
1169         if (retval) {
1170                 com_err (program_name, retval, _("while trying to open %s"),
1171                          image_fn);
1172                 exit(1);
1173         }
1174
1175         retval = ext2fs_read_bitmaps (fs);
1176         if (retval) {
1177                 com_err(program_name, retval, "error reading bitmaps");
1178                 exit(1);
1179         }
1180
1181         fd = ext2fs_open_file(image_fn, O_RDONLY, 0);
1182         if (fd < 0) {
1183                 perror(image_fn);
1184                 exit(1);
1185         }
1186
1187         retval = io_ptr->open(device, IO_FLAG_RW, &io);
1188         if (retval) {
1189                 com_err(device, 0, "while opening device file");
1190                 exit(1);
1191         }
1192
1193         ext2fs_rewrite_to_io(fs, io);
1194
1195         if (ext2fs_llseek(fd, fs->image_header->offset_inode, SEEK_SET) < 0) {
1196                 perror("ext2fs_llseek");
1197                 exit(1);
1198         }
1199
1200         retval = ext2fs_image_inode_read(fs, fd, 0);
1201         if (retval) {
1202                 com_err(image_fn, 0, "while restoring the image table");
1203                 exit(1);
1204         }
1205
1206         ext2fs_close (fs);
1207         exit (0);
1208 }
1209
1210 static struct ext2_qcow2_hdr *check_qcow2_image(int *fd, char *name)
1211 {
1212
1213         *fd = ext2fs_open_file(name, O_RDONLY, 0600);
1214         if (*fd < 0)
1215                 return NULL;
1216
1217         return qcow2_read_header(*fd);
1218 }
1219
1220 int main (int argc, char ** argv)
1221 {
1222         int c;
1223         errcode_t retval;
1224         ext2_filsys fs;
1225         char *image_fn;
1226         struct ext2_qcow2_hdr *header = NULL;
1227         int open_flag = EXT2_FLAG_64BITS;
1228         int img_type = 0;
1229         int flags = 0;
1230         int qcow2_fd = 0;
1231         int fd = 0;
1232         int ret = 0;
1233
1234 #ifdef ENABLE_NLS
1235         setlocale(LC_MESSAGES, "");
1236         setlocale(LC_CTYPE, "");
1237         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1238         textdomain(NLS_CAT_NAME);
1239         set_com_err_gettext(gettext);
1240 #endif
1241         fprintf (stderr, "e2image %s (%s)\n", E2FSPROGS_VERSION,
1242                  E2FSPROGS_DATE);
1243         if (argc && *argv)
1244                 program_name = *argv;
1245         add_error_table(&et_ext2_error_table);
1246         while ((c = getopt(argc, argv, "rsIQ")) != EOF)
1247                 switch (c) {
1248                 case 'I':
1249                         flags |= E2IMAGE_INSTALL_FLAG;
1250                         break;
1251                 case 'Q':
1252                         if (img_type)
1253                                 usage();
1254                         img_type |= E2IMAGE_QCOW2;
1255                         break;
1256                 case 'r':
1257                         if (img_type)
1258                                 usage();
1259                         img_type |= E2IMAGE_RAW;
1260                         break;
1261                 case 's':
1262                         flags |= E2IMAGE_SCRAMBLE_FLAG;
1263                         break;
1264                 default:
1265                         usage();
1266                 }
1267         if (optind != argc - 2 )
1268                 usage();
1269         device_name = argv[optind];
1270         image_fn = argv[optind+1];
1271
1272         if (flags & E2IMAGE_INSTALL_FLAG) {
1273                 install_image(device_name, image_fn, img_type);
1274                 exit (0);
1275         }
1276
1277         if (img_type & E2IMAGE_RAW) {
1278                 header = check_qcow2_image(&qcow2_fd, device_name);
1279                 if (header) {
1280                         flags |= E2IMAGE_IS_QCOW2_FLAG;
1281                         goto skip_device;
1282                 }
1283         }
1284
1285         retval = ext2fs_open (device_name, open_flag, 0, 0,
1286                               unix_io_manager, &fs);
1287         if (retval) {
1288                 com_err (program_name, retval, _("while trying to open %s"),
1289                          device_name);
1290                 fputs(_("Couldn't find valid filesystem superblock.\n"), stdout);
1291                 exit(1);
1292         }
1293
1294 skip_device:
1295         if (strcmp(image_fn, "-") == 0)
1296                 fd = 1;
1297         else {
1298                 fd = ext2fs_open_file(image_fn, O_CREAT|O_TRUNC|O_WRONLY, 0600);
1299                 if (fd < 0) {
1300                         com_err(program_name, errno,
1301                                 _("while trying to open %s"), argv[optind+1]);
1302                         exit(1);
1303                 }
1304         }
1305
1306         if ((img_type & E2IMAGE_QCOW2) && (fd == 1)) {
1307                 com_err(program_name, 0, "QCOW2 image can not be written to "
1308                                          "the stdout!\n");
1309                 exit(1);
1310         }
1311
1312         if (flags & E2IMAGE_IS_QCOW2_FLAG) {
1313                 ret = qcow2_write_raw_image(qcow2_fd, fd, header);
1314                 if (ret) {
1315                         if (ret == -QCOW_COMPRESSED)
1316                                 fprintf(stderr, "Image (%s) is compressed\n",
1317                                         image_fn);
1318                         if (ret == -QCOW_ENCRYPTED)
1319                                 fprintf(stderr, "Image (%s) is encrypted\n",
1320                                         image_fn);
1321                         com_err(program_name, ret,
1322                                 _("while trying to convert qcow2 image"
1323                                 " (%s) into raw image (%s)"),
1324                                 device_name, image_fn);
1325                 }
1326                 goto out;
1327         }
1328
1329
1330         if (img_type)
1331                 write_raw_image_file(fs, fd, img_type, flags);
1332         else
1333                 write_image_file(fs, fd);
1334
1335         ext2fs_close (fs);
1336 out:
1337         if (header)
1338                 free(header);
1339         if (qcow2_fd)
1340                 close(qcow2_fd);
1341         remove_error_table(&et_ext2_error_table);
1342         return ret;
1343 }