misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104
 105 int journal_size, journal_flags;
 106 char *journal_device;
 107 static blk64_t journal_location = ~0LL;
 108
 109 static struct list_head blk_move_list;
 110
 111 struct blk_move {
 112         struct list_head list;
 113         blk64_t old_loc;
 114         blk64_t new_loc;
 115 };
 116
 117 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 118
 119 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 120
 121 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 122 static const char *please_dir_fsck =
 123                 N_("Please run e2fsck -fD on the filesystem.\n");
 124
 125 #ifdef CONFIG_BUILD_FINDFS
 126 void do_findfs(int argc, char **argv);
 127 #endif
 128
 129 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 130 int journal_enable_debug = -1;
 131 #endif
 132
 133 static void usage(void)
 134 {
 135         fprintf(stderr,
 136                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 137                   "[-g group]\n"
 138                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 139                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 140                   "\t[-p mmp_update_interval] [-r reserved_blocks_count] "
 141                   "[-u user]\n"
 142                   "\t[-C mount_count] [-L volume_label] [-M last_mounted_dir]\n"
 143                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 144                   "\t[-E extended-option[,...]] [-T last_check_time] "
 145                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 146                 program_name);
 147         exit(1);
 148 }
 149
 150 static __u32 ok_features[3] = {
 151         /* Compat */
 152         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 153                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 154         /* Incompat */
 155         EXT2_FEATURE_INCOMPAT_FILETYPE |
 156                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 157                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 158                 EXT4_FEATURE_INCOMPAT_MMP |
 159                 EXT4_FEATURE_INCOMPAT_64BIT |
 160                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 161                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 162         /* R/O compat */
 163         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 164                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 165                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 166                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 167                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 168                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 169                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 170                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 171                 EXT4_FEATURE_RO_COMPAT_READONLY |
 172                 EXT4_FEATURE_RO_COMPAT_PROJECT
 173 };
 174
 175 static __u32 clear_ok_features[3] = {
 176         /* Compat */
 177         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 178                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 179                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 180         /* Incompat */
 181         EXT2_FEATURE_INCOMPAT_FILETYPE |
 182                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 183                 EXT4_FEATURE_INCOMPAT_MMP |
 184                 EXT4_FEATURE_INCOMPAT_64BIT |
 185                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 186         /* R/O compat */
 187         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 188                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 189                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 190                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 191                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 192                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 193                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 194                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 195                 EXT4_FEATURE_RO_COMPAT_READONLY
 196 };
 197
 198 /**
 199  * Try to get journal super block if any
 200  */
 201 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 202 {
 203         int retval;
 204         journal_superblock_t *jsb;
 205
 206         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 207                 return EXT2_ET_UNSUPP_FEATURE;
 208         }
 209
 210         /* Get the journal superblock */
 211         if ((retval = io_channel_read_blk64(jfs->io,
 212             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 213                 com_err(program_name, retval, "%s",
 214                 _("while reading journal superblock"));
 215                 return retval;
 216         }
 217
 218         jsb = (journal_superblock_t *) buf;
 219         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 220             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 221                 fputs(_("Journal superblock not found!\n"), stderr);
 222                 return EXT2_ET_BAD_MAGIC;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 229                           int nr_users)
 230 {
 231         int i;
 232         for (i = 0; i < nr_users; i++) {
 233                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 234                         return &s_users[i * UUID_SIZE];
 235         }
 236
 237         return NULL;
 238 }
 239
 240 /*
 241  * Remove an external journal from the filesystem
 242  */
 243 static int remove_journal_device(ext2_filsys fs)
 244 {
 245         char            *journal_path;
 246         ext2_filsys     jfs;
 247         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 248         journal_superblock_t    *jsb;
 249         int             i, nr_users;
 250         errcode_t       retval;
 251         int             commit_remove_journal = 0;
 252         io_manager      io_ptr;
 253
 254         if (f_flag)
 255                 commit_remove_journal = 1; /* force removal even if error */
 256
 257         uuid_unparse(fs->super->s_journal_uuid, buf);
 258         journal_path = blkid_get_devname(NULL, "UUID", buf);
 259
 260         if (!journal_path) {
 261                 journal_path =
 262                         ext2fs_find_block_device(fs->super->s_journal_dev);
 263                 if (!journal_path)
 264                         goto no_valid_journal;
 265         }
 266
 267 #ifdef CONFIG_TESTIO_DEBUG
 268         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 269                 io_ptr = test_io_manager;
 270                 test_io_backing_manager = unix_io_manager;
 271         } else
 272 #endif
 273                 io_ptr = unix_io_manager;
 274         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 275                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 276                              fs->blocksize, io_ptr, &jfs);
 277         if (retval) {
 278                 com_err(program_name, retval, "%s",
 279                         _("while trying to open external journal"));
 280                 goto no_valid_journal;
 281         }
 282
 283         if ((retval = get_journal_sb(jfs, buf))) {
 284                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 285                         fprintf(stderr, _("%s is not a journal device.\n"),
 286                                 journal_path);
 287                 goto no_valid_journal;
 288         }
 289
 290         jsb = (journal_superblock_t *) buf;
 291         /* Find the filesystem UUID */
 292         nr_users = ntohl(jsb->s_nr_users);
 293
 294         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 295                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 296                       stderr);
 297                 commit_remove_journal = 1;
 298                 goto no_valid_journal;
 299         }
 300         nr_users--;
 301         for (i = 0; i < nr_users; i++)
 302                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 303         jsb->s_nr_users = htonl(nr_users);
 304
 305         /* Write back the journal superblock */
 306         retval = io_channel_write_blk64(jfs->io,
 307                                         ext2fs_journal_sb_start(fs->blocksize),
 308                                         -SUPERBLOCK_SIZE, buf);
 309         if (retval) {
 310                 com_err(program_name, retval,
 311                         "while writing journal superblock.");
 312                 goto no_valid_journal;
 313         }
 314
 315         commit_remove_journal = 1;
 316
 317 no_valid_journal:
 318         if (commit_remove_journal == 0) {
 319                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 320                         "Use -f option to remove missing journal device.\n"),
 321                       stderr);
 322                 return 1;
 323         }
 324         fs->super->s_journal_dev = 0;
 325         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 326         uuid_clear(fs->super->s_journal_uuid);
 327         ext2fs_mark_super_dirty(fs);
 328         fputs(_("Journal removed\n"), stdout);
 329         free(journal_path);
 330
 331         return 0;
 332 }
 333
 334 /* Helper function for remove_journal_inode */
 335 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 336                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 337                                blk64_t ref_block EXT2FS_ATTR((unused)),
 338                                int ref_offset EXT2FS_ATTR((unused)),
 339                                void *private EXT2FS_ATTR((unused)))
 340 {
 341         blk64_t block;
 342         int     group;
 343
 344         block = *blocknr;
 345         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 346         group = ext2fs_group_of_blk2(fs, block);
 347         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 348         ext2fs_group_desc_csum_set(fs, group);
 349         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 350         return 0;
 351 }
 352
 353 /*
 354  * Remove the journal inode from the filesystem
 355  */
 356 static errcode_t remove_journal_inode(ext2_filsys fs)
 357 {
 358         struct ext2_inode       inode;
 359         errcode_t               retval;
 360         ino_t                   ino = fs->super->s_journal_inum;
 361
 362         retval = ext2fs_read_inode(fs, ino,  &inode);
 363         if (retval) {
 364                 com_err(program_name, retval, "%s",
 365                         _("while reading journal inode"));
 366                 return retval;
 367         }
 368         if (ino == EXT2_JOURNAL_INO) {
 369                 retval = ext2fs_read_bitmaps(fs);
 370                 if (retval) {
 371                         com_err(program_name, retval, "%s",
 372                                 _("while reading bitmaps"));
 373                         return retval;
 374                 }
 375                 retval = ext2fs_block_iterate3(fs, ino,
 376                                                BLOCK_FLAG_READ_ONLY, NULL,
 377                                                release_blocks_proc, NULL);
 378                 if (retval) {
 379                         com_err(program_name, retval, "%s",
 380                                 _("while clearing journal inode"));
 381                         return retval;
 382                 }
 383                 memset(&inode, 0, sizeof(inode));
 384                 ext2fs_mark_bb_dirty(fs);
 385                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 386         } else
 387                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 388         retval = ext2fs_write_inode(fs, ino, &inode);
 389         if (retval) {
 390                 com_err(program_name, retval, "%s",
 391                         _("while writing journal inode"));
 392                 return retval;
 393         }
 394         fs->super->s_journal_inum = 0;
 395         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 396         ext2fs_mark_super_dirty(fs);
 397
 398         return 0;
 399 }
 400
 401 /*
 402  * Update the default mount options
 403  */
 404 static int update_mntopts(ext2_filsys fs, char *mntopts)
 405 {
 406         struct ext2_super_block *sb = fs->super;
 407
 408         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 409                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 410                         mntopts);
 411                 return 1;
 412         }
 413         ext2fs_mark_super_dirty(fs);
 414
 415         return 0;
 416 }
 417
 418 static void check_fsck_needed(ext2_filsys fs, const char *prompt)
 419 {
 420         /* Refuse to modify anything but a freshly checked valid filesystem. */
 421         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 422             (fs->super->s_state & EXT2_ERROR_FS) ||
 423             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 424                 puts(_(fsck_explain));
 425                 puts(_(please_fsck));
 426                 if (mount_flags & EXT2_MF_READONLY)
 427                         printf("%s", _("(and reboot afterwards!)\n"));
 428                 exit(1);
 429         }
 430
 431         /* Give the admin a few seconds to bail out of a dangerous op. */
 432         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 433                 return;
 434
 435         puts(prompt);
 436         proceed_question(5);
 437 }
 438
 439 static void request_dir_fsck_afterwards(ext2_filsys fs)
 440 {
 441         static int requested;
 442
 443         if (requested++)
 444                 return;
 445         fsck_requested++;
 446         fs->super->s_state &= ~EXT2_VALID_FS;
 447         puts(_(fsck_explain));
 448         puts(_(please_dir_fsck));
 449         if (mount_flags & EXT2_MF_READONLY)
 450                 printf("%s", _("(and reboot afterwards!)\n"));
 451 }
 452
 453 static void request_fsck_afterwards(ext2_filsys fs)
 454 {
 455         static int requested = 0;
 456
 457         if (requested++)
 458                 return;
 459         fsck_requested++;
 460         fs->super->s_state &= ~EXT2_VALID_FS;
 461         printf("\n%s\n", _(please_fsck));
 462         if (mount_flags & EXT2_MF_READONLY)
 463                 printf("%s", _("(and reboot afterwards!)\n"));
 464 }
 465
 466 static void convert_64bit(ext2_filsys fs, int direction)
 467 {
 468         if (!direction)
 469                 return;
 470
 471         /*
 472          * Is resize2fs going to demand a fsck run? Might as well tell the
 473          * user now.
 474          */
 475         if (!fsck_requested &&
 476             ((fs->super->s_state & EXT2_ERROR_FS) ||
 477              !(fs->super->s_state & EXT2_VALID_FS) ||
 478              fs->super->s_lastcheck < fs->super->s_mtime))
 479                 request_fsck_afterwards(fs);
 480         if (fsck_requested)
 481                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 482                         direction > 0 ? "-b" : "-s", fs->device_name);
 483         else
 484                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 485                         direction > 0 ? "-b" : "-s", fs->device_name);
 486
 487         if (undo_file)
 488                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 489         if (direction > 0)
 490                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 491         else
 492                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 493 }
 494
 495 /* Rewrite extents */
 496 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 497                                  struct ext2_inode *inode)
 498 {
 499         ext2_extent_handle_t    handle;
 500         struct ext2fs_extent    extent;
 501         errcode_t               errcode;
 502         struct ext2_extent_info info;
 503
 504         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 505             !ext2fs_has_feature_metadata_csum(fs->super))
 506                 return 0;
 507
 508         errcode = ext2fs_extent_open(fs, ino, &handle);
 509         if (errcode)
 510                 return errcode;
 511
 512         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 513         if (errcode)
 514                 goto out;
 515
 516         do {
 517                 errcode = ext2fs_extent_get_info(handle, &info);
 518                 if (errcode)
 519                         break;
 520
 521                 /*
 522                  * If this is the first extent in an extent block that we
 523                  * haven't visited, rewrite the extent to force the ETB
 524                  * checksum to be rewritten.
 525                  */
 526                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 527                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 528                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 529                         if (errcode)
 530                                 break;
 531                 }
 532
 533                 /* Skip to the end of a block of leaf nodes */
 534                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 535                         errcode = ext2fs_extent_get(handle,
 536                                                     EXT2_EXTENT_LAST_SIB,
 537                                                     &extent);
 538                         if (errcode)
 539                                 break;
 540                 }
 541
 542                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 543         } while (errcode == 0);
 544
 545 out:
 546         /* Ok if we run off the end */
 547         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 548                 errcode = 0;
 549         ext2fs_extent_free(handle);
 550         return errcode;
 551 }
 552
 553 /*
 554  * Rewrite directory blocks with checksums
 555  */
 556 struct rewrite_dir_context {
 557         char *buf;
 558         errcode_t errcode;
 559         ext2_ino_t dir;
 560         int is_htree;
 561 };
 562
 563 static int rewrite_dir_block(ext2_filsys fs,
 564                              blk64_t    *blocknr,
 565                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 566                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 567                              int        ref_offset EXT2FS_ATTR((unused)),
 568                              void       *priv_data)
 569 {
 570         struct ext2_dx_countlimit *dcl = NULL;
 571         struct rewrite_dir_context *ctx = priv_data;
 572         int dcl_offset, changed = 0;
 573
 574         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 575                                               ctx->dir);
 576         if (ctx->errcode)
 577                 return BLOCK_ABORT;
 578
 579         /* if htree node... */
 580         if (ctx->is_htree)
 581                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 582                                          &dcl, &dcl_offset);
 583         if (dcl) {
 584                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 585                         /* Ensure limit is the max size */
 586                         int max_entries = (fs->blocksize - dcl_offset) /
 587                                           sizeof(struct ext2_dx_entry);
 588                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 589                                 changed = 1;
 590                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 591                         }
 592                 } else {
 593                         /* If htree block is full then rebuild the dir */
 594                         if (ext2fs_le16_to_cpu(dcl->count) ==
 595                             ext2fs_le16_to_cpu(dcl->limit)) {
 596                                 request_dir_fsck_afterwards(fs);
 597                                 return 0;
 598                         }
 599                         /*
 600                          * Ensure dcl->limit is small enough to leave room for
 601                          * the checksum tail.
 602                          */
 603                         int max_entries = (fs->blocksize - (dcl_offset +
 604                                                 sizeof(struct ext2_dx_tail))) /
 605                                           sizeof(struct ext2_dx_entry);
 606                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 607                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 608                         /* Always rewrite checksum */
 609                         changed = 1;
 610                 }
 611         } else {
 612                 unsigned int rec_len, name_size;
 613                 char *top = ctx->buf + fs->blocksize;
 614                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 615                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 616
 617                 /* Find last and penultimate dirent */
 618                 while ((char *)de < top) {
 619                         penultimate_de = last_de;
 620                         last_de = de;
 621                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 622                         if (!ctx->errcode && !rec_len)
 623                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 624                         if (ctx->errcode)
 625                                 return BLOCK_ABORT;
 626                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 627                 }
 628                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 629                 if (ctx->errcode)
 630                         return BLOCK_ABORT;
 631                 name_size = ext2fs_dirent_name_len(last_de);
 632
 633                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 634                         if (!penultimate_de)
 635                                 return 0;
 636                         if (last_de->inode ||
 637                             name_size ||
 638                             rec_len != sizeof(struct ext2_dir_entry_tail))
 639                                 return 0;
 640                         /*
 641                          * The last dirent is unused and the right length to
 642                          * have stored a checksum.  Erase it.
 643                          */
 644                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 645                                                           &rec_len);
 646                         if (!rec_len)
 647                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 648                         if (ctx->errcode)
 649                                 return BLOCK_ABORT;
 650                         ext2fs_set_rec_len(fs, rec_len +
 651                                         sizeof(struct ext2_dir_entry_tail),
 652                                         penultimate_de);
 653                         changed = 1;
 654                 } else {
 655                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 656                         struct ext2_dir_entry_tail *t;
 657
 658                         /*
 659                          * If the last dirent looks like the tail, just update
 660                          * the checksum.
 661                          */
 662                         if (!last_de->inode &&
 663                             rec_len == csum_size) {
 664                                 t = (struct ext2_dir_entry_tail *)last_de;
 665                                 t->det_reserved_name_len =
 666                                                 EXT2_DIR_NAME_LEN_CSUM;
 667                                 changed = 1;
 668                                 goto out;
 669                         }
 670                         if (name_size & 3)
 671                                 name_size = (name_size & ~3) + 4;
 672                         /* If there's not enough space for the tail, e2fsck */
 673                         if (rec_len <= (8 + name_size + csum_size)) {
 674                                 request_dir_fsck_afterwards(fs);
 675                                 return 0;
 676                         }
 677                         /* Shorten that last de and insert the tail */
 678                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 679                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 680                         ext2fs_initialize_dirent_tail(fs, t);
 681
 682                         /* Always update checksum */
 683                         changed = 1;
 684                 }
 685         }
 686
 687 out:
 688         if (!changed)
 689                 return 0;
 690
 691         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 692                                                0, ctx->dir);
 693         if (ctx->errcode)
 694                 return BLOCK_ABORT;
 695
 696         return 0;
 697 }
 698
 699 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 700                                    struct ext2_inode *inode)
 701 {
 702         errcode_t       retval;
 703         struct rewrite_dir_context ctx;
 704
 705         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 706         if (retval)
 707                 return retval;
 708
 709         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 710         ctx.dir = dir;
 711         ctx.errcode = 0;
 712         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 713                                                 BLOCK_FLAG_DATA_ONLY,
 714                                        0, rewrite_dir_block, &ctx);
 715
 716         ext2fs_free_mem(&ctx.buf);
 717         if (retval)
 718                 return retval;
 719
 720         return ctx.errcode;
 721 }
 722
 723 /*
 724  * Forcibly set checksums in all inodes.
 725  */
 726 static void rewrite_inodes(ext2_filsys fs)
 727 {
 728         int length = EXT2_INODE_SIZE(fs->super);
 729         struct ext2_inode *inode, *zero;
 730         char            *ea_buf;
 731         ext2_inode_scan scan;
 732         errcode_t       retval;
 733         ext2_ino_t      ino;
 734         blk64_t         file_acl_block;
 735         int             inode_dirty;
 736
 737         if (fs->super->s_creator_os == EXT2_OS_HURD)
 738                 return;
 739
 740         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 741         if (retval) {
 742                 com_err("set_csum", retval, "while opening inode scan");
 743                 exit(1);
 744         }
 745
 746         retval = ext2fs_get_mem(length, &inode);
 747         if (retval) {
 748                 com_err("set_csum", retval, "while allocating memory");
 749                 exit(1);
 750         }
 751
 752         retval = ext2fs_get_memzero(length, &zero);
 753         if (retval) {
 754                 com_err("set_csum", retval, "while allocating memory");
 755                 exit(1);
 756         }
 757
 758         retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
 759         if (retval) {
 760                 com_err("set_csum", retval, "while allocating memory");
 761                 exit(1);
 762         }
 763
 764         do {
 765                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 766                 if (retval) {
 767                         com_err("set_csum", retval, "while getting next inode");
 768                         exit(1);
 769                 }
 770                 if (!ino)
 771                         break;
 772                 if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 773                         inode_dirty = 1;
 774                 } else {
 775                         if (memcmp(inode, zero, length) != 0) {
 776                                 memset(inode, 0, length);
 777                                 inode_dirty = 1;
 778                         } else {
 779                                 inode_dirty = 0;
 780                         }
 781                 }
 782
 783                 if (inode_dirty) {
 784                         retval = ext2fs_write_inode_full(fs, ino, inode,
 785                                                          length);
 786                         if (retval) {
 787                                 com_err("set_csum", retval, "while writing "
 788                                         "inode");
 789                                 exit(1);
 790                         }
 791                 }
 792
 793                 retval = rewrite_extents(fs, ino, inode);
 794                 if (retval) {
 795                         com_err("rewrite_extents", retval,
 796                                 "while rewriting extents");
 797                         exit(1);
 798                 }
 799
 800                 if (LINUX_S_ISDIR(inode->i_mode) &&
 801                     ext2fs_inode_has_valid_blocks2(fs, inode)) {
 802                         retval = rewrite_directory(fs, ino, inode);
 803                         if (retval) {
 804                                 com_err("rewrite_directory", retval,
 805                                         "while rewriting directories");
 806                                 exit(1);
 807                         }
 808                 }
 809
 810                 file_acl_block = ext2fs_file_acl_block(fs, inode);
 811                 if (!file_acl_block)
 812                         continue;
 813                 retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
 814                 if (retval) {
 815                         com_err("rewrite_eablock", retval,
 816                                 "while rewriting extended attribute");
 817                         exit(1);
 818                 }
 819                 retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
 820                                                 ino);
 821                 if (retval) {
 822                         com_err("rewrite_eablock", retval,
 823                                 "while rewriting extended attribute");
 824                         exit(1);
 825                 }
 826         } while (ino);
 827
 828         ext2fs_free_mem(&zero);
 829         ext2fs_free_mem(&inode);
 830         ext2fs_free_mem(&ea_buf);
 831         ext2fs_close_inode_scan(scan);
 832 }
 833
 834 static void rewrite_metadata_checksums(ext2_filsys fs)
 835 {
 836         errcode_t retval;
 837         dgrp_t i;
 838
 839         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 840         ext2fs_init_csum_seed(fs);
 841         for (i = 0; i < fs->group_desc_count; i++)
 842                 ext2fs_group_desc_csum_set(fs, i);
 843         retval = ext2fs_read_bitmaps(fs);
 844         if (retval) {
 845                 com_err("rewrite_metadata_checksums", retval,
 846                         "while reading bitmaps");
 847                 exit(1);
 848         }
 849         rewrite_inodes(fs);
 850         ext2fs_mark_ib_dirty(fs);
 851         ext2fs_mark_bb_dirty(fs);
 852         ext2fs_mmp_update2(fs, 1);
 853         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 854         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 855         if (ext2fs_has_feature_metadata_csum(fs->super))
 856                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 857         else
 858                 fs->super->s_checksum_type = 0;
 859         ext2fs_mark_super_dirty(fs);
 860 }
 861
 862 static void enable_uninit_bg(ext2_filsys fs)
 863 {
 864         struct ext2_group_desc *gd;
 865         dgrp_t i;
 866
 867         for (i = 0; i < fs->group_desc_count; i++) {
 868                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 869                 gd->bg_itable_unused = 0;
 870                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 871                 ext2fs_group_desc_csum_set(fs, i);
 872         }
 873         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 874 }
 875
 876 static errcode_t zero_empty_inodes(ext2_filsys fs)
 877 {
 878         int length = EXT2_INODE_SIZE(fs->super);
 879         struct ext2_inode *inode = NULL;
 880         ext2_inode_scan scan;
 881         errcode_t       retval;
 882         ext2_ino_t      ino;
 883
 884         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 885         if (retval)
 886                 goto out;
 887
 888         retval = ext2fs_get_mem(length, &inode);
 889         if (retval)
 890                 goto out;
 891
 892         do {
 893                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 894                 if (retval)
 895                         goto out;
 896                 if (!ino)
 897                         break;
 898                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 899                         memset(inode, 0, length);
 900                         retval = ext2fs_write_inode_full(fs, ino, inode,
 901                                                          length);
 902                         if (retval)
 903                                 goto out;
 904                 }
 905         } while (1);
 906
 907 out:
 908         ext2fs_free_mem(&inode);
 909         ext2fs_close_inode_scan(scan);
 910         return retval;
 911 }
 912
 913 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 914 {
 915         struct ext2_group_desc *gd;
 916         dgrp_t i;
 917         errcode_t retval;
 918         blk64_t b, c, d;
 919
 920         /* Load bitmaps to ensure that the uninit ones get written out */
 921         fs->super->s_feature_ro_compat |= csum_feature_flag;
 922         retval = ext2fs_read_bitmaps(fs);
 923         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 924         if (retval) {
 925                 com_err("disable_uninit_bg", retval,
 926                         "while reading bitmaps");
 927                 request_fsck_afterwards(fs);
 928                 return retval;
 929         }
 930         ext2fs_mark_ib_dirty(fs);
 931         ext2fs_mark_bb_dirty(fs);
 932
 933         /* If we're only turning off uninit_bg, zero the inodes */
 934         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 935                 retval = zero_empty_inodes(fs);
 936                 if (retval) {
 937                         com_err("disable_uninit_bg", retval,
 938                                 "while zeroing unused inodes");
 939                         request_fsck_afterwards(fs);
 940                         return retval;
 941                 }
 942         }
 943
 944         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
 945         for (i = 0; i < fs->group_desc_count; i++) {
 946                 b = ext2fs_block_bitmap_loc(fs, i);
 947                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 948                 b = ext2fs_inode_bitmap_loc(fs, i);
 949                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 950
 951                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
 952                 if (retval == 0 && b)
 953                         ext2fs_mark_block_bitmap2(fs->block_map, b);
 954                 if (retval == 0 && c)
 955                         ext2fs_mark_block_bitmap2(fs->block_map, c);
 956                 if (retval == 0 && d)
 957                         ext2fs_mark_block_bitmap2(fs->block_map, d);
 958                 if (retval) {
 959                         com_err("disable_uninit_bg", retval,
 960                                 "while initializing block bitmaps");
 961                         request_fsck_afterwards(fs);
 962                 }
 963
 964                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 965                 gd->bg_itable_unused = 0;
 966                 gd->bg_flags = 0;
 967                 ext2fs_group_desc_csum_set(fs, i);
 968         }
 969         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 970         ext2fs_mark_super_dirty(fs);
 971
 972         return 0;
 973 }
 974
 975 static void
 976 try_confirm_csum_seed_support(void)
 977 {
 978         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
 979                 fputs(_("WARNING: Could not confirm kernel support for "
 980                         "metadata_csum_seed.\n  This requires Linux >= "
 981                         "v4.4.\n"), stderr);
 982 }
 983
 984 /*
 985  * Update the feature set as provided by the user.
 986  */
 987 static int update_feature_set(ext2_filsys fs, char *features)
 988 {
 989         struct ext2_super_block *sb = fs->super;
 990         __u32           old_features[3];
 991         int             type_err;
 992         unsigned int    mask_err;
 993         errcode_t       err;
 994         enum quota_type qtype;
 995
 996 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
 997                                 ((&sb->s_feature_compat)[(type)] & (mask)))
 998 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
 999                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1000 #define FEATURE_CHANGED(type, mask) ((mask) & \
1001                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1002
1003         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1004         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1005         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1006
1007         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1008                               ok_features, clear_ok_features,
1009                               &type_err, &mask_err)) {
1010                 if (!mask_err)
1011                         fprintf(stderr,
1012                                 _("Invalid filesystem option set: %s\n"),
1013                                 features);
1014                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1015                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1016                                           "not supported.\n"),
1017                                 e2p_feature2string(type_err &
1018                                                    E2P_FEATURE_TYPE_MASK,
1019                                                    mask_err));
1020                 else
1021                         fprintf(stderr, _("Setting filesystem feature '%s' "
1022                                           "not supported.\n"),
1023                                 e2p_feature2string(type_err, mask_err));
1024                 return 1;
1025         }
1026
1027         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1028                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1029                     !(mount_flags & EXT2_MF_READONLY)) {
1030                         fputs(_("The has_journal feature may only be "
1031                                 "cleared when the filesystem is\n"
1032                                 "unmounted or mounted "
1033                                 "read-only.\n"), stderr);
1034                         return 1;
1035                 }
1036                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1037                     f_flag < 2) {
1038                         fputs(_("The needs_recovery flag is set.  "
1039                                 "Please run e2fsck before clearing\n"
1040                                 "the has_journal flag.\n"), stderr);
1041                         return 1;
1042                 }
1043                 if (sb->s_journal_inum) {
1044                         if (remove_journal_inode(fs))
1045                                 return 1;
1046                 }
1047                 if (sb->s_journal_dev) {
1048                         if (remove_journal_device(fs))
1049                                 return 1;
1050                 }
1051         }
1052
1053         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1054                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1055                 if (ext2fs_has_feature_meta_bg(sb)) {
1056                         fputs(_("Setting filesystem feature 'sparse_super' "
1057                                 "not supported\nfor filesystems with "
1058                                 "the meta_bg feature enabled.\n"),
1059                                 stderr);
1060                         return 1;
1061                 }
1062         }
1063
1064         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1065                 int error;
1066
1067                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1068                     (mount_flags & EXT2_MF_READONLY)) {
1069                         fputs(_("The multiple mount protection feature can't\n"
1070                                 "be set if the filesystem is mounted or\n"
1071                                 "read-only.\n"), stderr);
1072                         return 1;
1073                 }
1074
1075                 error = ext2fs_mmp_init(fs);
1076                 if (error) {
1077                         fputs(_("\nError while enabling multiple mount "
1078                                 "protection feature."), stderr);
1079                         return 1;
1080                 }
1081
1082                 /*
1083                  * We want to update group desc with the new free blocks count
1084                  */
1085                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1086
1087                 printf(_("Multiple mount protection has been enabled "
1088                          "with update interval %ds.\n"),
1089                        sb->s_mmp_update_interval);
1090         }
1091
1092         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1093                 int error;
1094
1095                 if (mount_flags & EXT2_MF_READONLY) {
1096                         fputs(_("The multiple mount protection feature cannot\n"
1097                                 "be disabled if the filesystem is readonly.\n"),
1098                                 stderr);
1099                         return 1;
1100                 }
1101
1102                 error = ext2fs_read_bitmaps(fs);
1103                 if (error) {
1104                         fputs(_("Error while reading bitmaps\n"), stderr);
1105                         return 1;
1106                 }
1107
1108                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1109                 if (error) {
1110                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1111
1112                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1113                                 printf(_("Magic number in MMP block does not "
1114                                          "match. expected: %x, actual: %x\n"),
1115                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1116                         else
1117                                 com_err(program_name, error, "%s",
1118                                         _("while reading MMP block."));
1119                         goto mmp_error;
1120                 }
1121
1122                 /* We need to force out the group descriptors as well */
1123                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1124                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1125 mmp_error:
1126                 sb->s_mmp_block = 0;
1127                 sb->s_mmp_update_interval = 0;
1128         }
1129
1130         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1131                 /*
1132                  * If adding a journal flag, let the create journal
1133                  * code below handle setting the flag and creating the
1134                  * journal.  We supply a default size if necessary.
1135                  */
1136                 if (!journal_size)
1137                         journal_size = -1;
1138                 ext2fs_clear_feature_journal(sb);
1139         }
1140
1141         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1142                 if (!sb->s_def_hash_version)
1143                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1144                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1145                         uuid_generate((unsigned char *) sb->s_hash_seed);
1146         }
1147
1148         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1149                 if (ext2fs_check_desc(fs)) {
1150                         fputs(_("Clearing the flex_bg flag would "
1151                                 "cause the the filesystem to be\n"
1152                                 "inconsistent.\n"), stderr);
1153                         return 1;
1154                 }
1155         }
1156
1157         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1158                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1159                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1160                     !(mount_flags & EXT2_MF_READONLY)) {
1161                         fputs(_("The huge_file feature may only be "
1162                                 "cleared when the filesystem is\n"
1163                                 "unmounted or mounted "
1164                                 "read-only.\n"), stderr);
1165                         return 1;
1166                 }
1167         }
1168
1169         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1170                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1171                 check_fsck_needed(fs,
1172                         _("Enabling checksums could take some time."));
1173                 if (mount_flags & EXT2_MF_MOUNTED) {
1174                         fputs(_("Cannot enable metadata_csum on a mounted "
1175                                 "filesystem!\n"), stderr);
1176                         exit(1);
1177                 }
1178                 if (!ext2fs_has_feature_extents(fs->super))
1179                         printf("%s",
1180                                _("Extents are not enabled.  The file extent "
1181                                  "tree can be checksummed, whereas block maps "
1182                                  "cannot.  Not enabling extents reduces the "
1183                                  "coverage of metadata checksumming.  "
1184                                  "Re-run with -O extent to rectify.\n"));
1185                 if (!ext2fs_has_feature_64bit(fs->super))
1186                         printf("%s",
1187                                _("64-bit filesystem support is not enabled.  "
1188                                  "The larger fields afforded by this feature "
1189                                  "enable full-strength checksumming.  "
1190                                  "Run resize2fs -b to rectify.\n"));
1191                 rewrite_checksums = 1;
1192                 /* metadata_csum supersedes uninit_bg */
1193                 ext2fs_clear_feature_gdt_csum(fs->super);
1194
1195                 /* if uninit_bg was previously off, rewrite group desc */
1196                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1197                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1198                         enable_uninit_bg(fs);
1199
1200                 /*
1201                  * Since metadata_csum supersedes uninit_bg, pretend like
1202                  * uninit_bg has been off all along.
1203                  */
1204                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1205                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1206         }
1207
1208         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1209                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1210                 __u32   test_features[3];
1211
1212                 check_fsck_needed(fs,
1213                         _("Disabling checksums could take some time."));
1214                 if (mount_flags & EXT2_MF_MOUNTED) {
1215                         fputs(_("Cannot disable metadata_csum on a mounted "
1216                                 "filesystem!\n"), stderr);
1217                         exit(1);
1218                 }
1219                 rewrite_checksums = 1;
1220
1221                 /* Enable uninit_bg unless the user expressly turned it off */
1222                 memcpy(test_features, old_features, sizeof(test_features));
1223                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1224                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1225                 e2p_edit_feature2(features, test_features, ok_features,
1226                                   clear_ok_features, NULL, NULL);
1227                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1228                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1229                         ext2fs_set_feature_gdt_csum(fs->super);
1230
1231                 /*
1232                  * If we're turning off metadata_csum and not turning on
1233                  * uninit_bg, rewrite group desc.
1234                  */
1235                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1236                         err = disable_uninit_bg(fs,
1237                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1238                         if (err)
1239                                 return 1;
1240                 } else
1241                         /*
1242                          * metadata_csum previously provided uninit_bg, so if
1243                          * we're also setting the uninit_bg feature bit,
1244                          * pretend like it was previously enabled.  Checksums
1245                          * will be rewritten with crc16 later.
1246                          */
1247                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1248                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1249                 fs->super->s_checksum_seed = 0;
1250                 ext2fs_clear_feature_csum_seed(fs->super);
1251         }
1252
1253         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1254                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1255                 /* Do not enable uninit_bg when metadata_csum enabled */
1256                 if (ext2fs_has_feature_metadata_csum(fs->super))
1257                         ext2fs_clear_feature_gdt_csum(fs->super);
1258                 else
1259                         enable_uninit_bg(fs);
1260         }
1261
1262         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1263                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1264                 err = disable_uninit_bg(fs,
1265                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1266                 if (err)
1267                         return 1;
1268         }
1269
1270         /*
1271          * We don't actually toggle 64bit; resize2fs does that.  But this
1272          * must come after the metadata_csum feature_on so that it won't
1273          * complain about the lack of 64bit.
1274          */
1275         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1276                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1277                 if (mount_flags & EXT2_MF_MOUNTED) {
1278                         fprintf(stderr, _("Cannot enable 64-bit mode "
1279                                           "while mounted!\n"));
1280                         exit(1);
1281                 }
1282                 ext2fs_clear_feature_64bit(sb);
1283                 feature_64bit = 1;
1284         }
1285         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1286                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1287                 if (mount_flags & EXT2_MF_MOUNTED) {
1288                         fprintf(stderr, _("Cannot disable 64-bit mode "
1289                                           "while mounted!\n"));
1290                         exit(1);
1291                 }
1292                 ext2fs_set_feature_64bit(sb);
1293                 feature_64bit = -1;
1294         }
1295
1296         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1297                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1298                 /*
1299                  * Set the Q_flag here and handle the quota options in the code
1300                  * below.
1301                  */
1302                 if (!Q_flag) {
1303                         Q_flag = 1;
1304                         /* Enable usr/grp quota by default */
1305                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1306                                 if (qtype != PRJQUOTA)
1307                                         quota_enable[qtype] = QOPT_ENABLE;
1308                                 else
1309                                         quota_enable[qtype] = QOPT_DISABLE;
1310                         }
1311                 }
1312                 ext2fs_clear_feature_quota(sb);
1313         }
1314
1315         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1316                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1317                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1318                         fprintf(stderr, _("Cannot enable project feature; "
1319                                           "inode size too small.\n"));
1320                         exit(1);
1321                 }
1322                 Q_flag = 1;
1323                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1324         }
1325
1326         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1327                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1328                 Q_flag = 1;
1329                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1330         }
1331
1332         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1333                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1334                 /*
1335                  * Set the Q_flag here and handle the quota options in the code
1336                  * below.
1337                  */
1338                 if (Q_flag)
1339                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1340                                 "arguments.\n"), stderr);
1341                 Q_flag = 1;
1342                 /* Disable all quota by default */
1343                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1344                         quota_enable[qtype] = QOPT_DISABLE;
1345         }
1346
1347         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1348                 fs->super->s_encrypt_algos[0] =
1349                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1350                 fs->super->s_encrypt_algos[1] =
1351                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1352         }
1353
1354         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1355                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1356                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1357                         fputs(_("Setting feature 'metadata_csum_seed' "
1358                                 "is only supported\non filesystems with "
1359                                 "the metadata_csum feature enabled.\n"),
1360                                 stderr);
1361                         return 1;
1362                 }
1363                 try_confirm_csum_seed_support();
1364                 fs->super->s_checksum_seed = fs->csum_seed;
1365         }
1366
1367         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1368                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1369                 __le32 uuid_seed;
1370
1371                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1372                                         sizeof(fs->super->s_uuid));
1373                 if (fs->super->s_checksum_seed != uuid_seed &&
1374                     (mount_flags & EXT2_MF_MOUNTED)) {
1375                         fputs(_("UUID has changed since enabling "
1376                                 "metadata_csum.  Filesystem must be unmounted "
1377                                 "\nto safely rewrite all metadata to "
1378                                 "match the new UUID.\n"), stderr);
1379                         return 1;
1380                 }
1381
1382                 rewrite_checksums = 1;
1383         }
1384
1385         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1386             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1387              sb->s_feature_incompat))
1388                 ext2fs_update_dynamic_rev(fs);
1389
1390         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1391                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1392             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1393                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1394             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1395                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1396             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1397                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1398             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1399                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1400                 request_fsck_afterwards(fs);
1401
1402         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1403             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1404             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1405                 ext2fs_mark_super_dirty(fs);
1406
1407         return 0;
1408 }
1409
1410 /*
1411  * Add a journal to the filesystem.
1412  */
1413 static int add_journal(ext2_filsys fs)
1414 {
1415         unsigned long journal_blocks;
1416         errcode_t       retval;
1417         ext2_filsys     jfs;
1418         io_manager      io_ptr;
1419
1420         if (ext2fs_has_feature_journal(fs->super)) {
1421                 fputs(_("The filesystem already has a journal.\n"), stderr);
1422                 goto err;
1423         }
1424         if (journal_device) {
1425                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1426                                         NULL))
1427                         proceed_question(-1);
1428                 check_mount(journal_device, 0, _("journal"));
1429 #ifdef CONFIG_TESTIO_DEBUG
1430                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1431                         io_ptr = test_io_manager;
1432                         test_io_backing_manager = unix_io_manager;
1433                 } else
1434 #endif
1435                         io_ptr = unix_io_manager;
1436                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1437                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1438                                      fs->blocksize, io_ptr, &jfs);
1439                 if (retval) {
1440                         com_err(program_name, retval,
1441                                 _("\n\twhile trying to open journal on %s\n"),
1442                                 journal_device);
1443                         goto err;
1444                 }
1445                 printf(_("Creating journal on device %s: "),
1446                        journal_device);
1447                 fflush(stdout);
1448
1449                 retval = ext2fs_add_journal_device(fs, jfs);
1450                 ext2fs_close_free(&jfs);
1451                 if (retval) {
1452                         com_err(program_name, retval,
1453                                 _("while adding filesystem to journal on %s"),
1454                                 journal_device);
1455                         goto err;
1456                 }
1457                 fputs(_("done\n"), stdout);
1458         } else if (journal_size) {
1459                 fputs(_("Creating journal inode: "), stdout);
1460                 fflush(stdout);
1461                 journal_blocks = figure_journal_size(journal_size, fs);
1462
1463                 if (journal_location_string)
1464                         journal_location =
1465                                 parse_num_blocks2(journal_location_string,
1466                                                   fs->super->s_log_block_size);
1467                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1468                                                    journal_location,
1469                                                    journal_flags);
1470                 if (retval) {
1471                         fprintf(stderr, "\n");
1472                         com_err(program_name, retval, "%s",
1473                                 _("\n\twhile trying to create journal file"));
1474                         return retval;
1475                 } else
1476                         fputs(_("done\n"), stdout);
1477                 /*
1478                  * If the filesystem wasn't mounted, we need to force
1479                  * the block group descriptors out.
1480                  */
1481                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1482                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1483         }
1484         print_check_message(fs->super->s_max_mnt_count,
1485                             fs->super->s_checkinterval);
1486         return 0;
1487
1488 err:
1489         free(journal_device);
1490         return 1;
1491 }
1492
1493 static void handle_quota_options(ext2_filsys fs)
1494 {
1495         errcode_t retval;
1496         quota_ctx_t qctx;
1497         ext2_ino_t qf_ino;
1498         enum quota_type qtype;
1499         unsigned int qtype_bits = 0;
1500         int need_dirty = 0;
1501
1502         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1503                 if (quota_enable[qtype] != 0)
1504                         break;
1505         if (qtype == MAXQUOTAS)
1506                 /* Nothing to do. */
1507                 return;
1508
1509         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1510             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1511                 fprintf(stderr, _("Cannot enable project quota; "
1512                                   "inode size too small.\n"));
1513                 exit(1);
1514         }
1515
1516         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1517                 if (quota_enable[qtype] == QOPT_ENABLE)
1518                         qtype_bits |= 1 << qtype;
1519         }
1520
1521         retval = quota_init_context(&qctx, fs, qtype_bits);
1522         if (retval) {
1523                 com_err(program_name, retval,
1524                         _("while initializing quota context in support library"));
1525                 exit(1);
1526         }
1527
1528         if (qtype_bits)
1529                 quota_compute_usage(qctx);
1530
1531         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1532                 if (quota_enable[qtype] == QOPT_ENABLE &&
1533                     *quota_sb_inump(fs->super, qtype) == 0) {
1534                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1535                                 retval = quota_update_limits(qctx, qf_ino,
1536                                                              qtype);
1537                                 if (retval) {
1538                                         com_err(program_name, retval,
1539                                                 _("while updating quota limits (%d)"),
1540                                                 qtype);
1541                                         exit(1);
1542                                 }
1543                         }
1544                         retval = quota_write_inode(qctx, 1 << qtype);
1545                         if (retval) {
1546                                 com_err(program_name, retval,
1547                                         _("while writing quota file (%d)"),
1548                                         qtype);
1549                                 exit(1);
1550                         }
1551                         /* Enable Quota feature if one of quota enabled */
1552                         if (!ext2fs_has_feature_quota(fs->super)) {
1553                                 ext2fs_set_feature_quota(fs->super);
1554                                 need_dirty = 1;
1555                         }
1556                         if (qtype == PRJQUOTA &&
1557                             !ext2fs_has_feature_project(fs->super)) {
1558                                 ext2fs_set_feature_project(fs->super);
1559                                 need_dirty = 1;
1560                         }
1561                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1562                         retval = quota_remove_inode(fs, qtype);
1563                         if (retval) {
1564                                 com_err(program_name, retval,
1565                                         _("while removing quota file (%d)"),
1566                                         qtype);
1567                                 exit(1);
1568                         }
1569                         if (qtype == PRJQUOTA) {
1570                                 ext2fs_clear_feature_project(fs->super);
1571                                 need_dirty = 1;
1572                         }
1573                 }
1574         }
1575
1576         quota_release_context(&qctx);
1577         /* Clear Quota feature if all quota types disabled. */
1578         if (!qtype_bits) {
1579                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1580                         if (*quota_sb_inump(fs->super, qtype))
1581                                 break;
1582                 if (qtype == MAXQUOTAS) {
1583                         ext2fs_clear_feature_quota(fs->super);
1584                         need_dirty = 1;
1585                 }
1586
1587         }
1588         if (need_dirty)
1589                 ext2fs_mark_super_dirty(fs);
1590         return;
1591 }
1592
1593 static int option_handle_function(char *token)
1594 {
1595         if (strncmp(token, "usr", 3) == 0) {
1596                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1597         } else if (strncmp(token, "^usr", 4) == 0) {
1598                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1599         } else if (strncmp(token, "grp", 3) == 0) {
1600                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1601         } else if (strncmp(token, "^grp", 4) == 0) {
1602                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1603         } else if (strncmp(token, "prj", 3) == 0) {
1604                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1605         } else if (strncmp(token, "^prj", 4) == 0) {
1606                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1607         } else {
1608                 fputs(_("\nBad quota options specified.\n\n"
1609                         "Following valid quota options are available "
1610                         "(pass by separating with comma):\n"
1611                         "\t[^]usr[quota]\n"
1612                         "\t[^]grp[quota]\n"
1613                         "\t[^]prj[quota]\n"
1614                         "\n\n"), stderr);
1615                 return 1;
1616         }
1617         return 0;
1618 }
1619
1620 static void parse_e2label_options(int argc, char ** argv)
1621 {
1622         if ((argc < 2) || (argc > 3)) {
1623                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1624                 exit(1);
1625         }
1626         io_options = strchr(argv[1], '?');
1627         if (io_options)
1628                 *io_options++ = 0;
1629         device_name = blkid_get_devname(NULL, argv[1], NULL);
1630         if (!device_name) {
1631                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1632                         argv[1]);
1633                 exit(1);
1634         }
1635         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1636         if (argc == 3) {
1637                 open_flag |= EXT2_FLAG_RW;
1638                 L_flag = 1;
1639                 new_label = argv[2];
1640         } else
1641                 print_label++;
1642 }
1643
1644 static time_t parse_time(char *str)
1645 {
1646         struct  tm      ts;
1647
1648         if (strcmp(str, "now") == 0) {
1649                 return (time(0));
1650         }
1651         memset(&ts, 0, sizeof(ts));
1652 #ifdef HAVE_STRPTIME
1653         strptime(str, "%Y%m%d%H%M%S", &ts);
1654 #else
1655         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1656                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1657         ts.tm_year -= 1900;
1658         ts.tm_mon -= 1;
1659         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1660             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1661             ts.tm_min > 59 || ts.tm_sec > 61)
1662                 ts.tm_mday = 0;
1663 #endif
1664         if (ts.tm_mday == 0) {
1665                 com_err(program_name, 0,
1666                         _("Couldn't parse date/time specifier: %s"),
1667                         str);
1668                 usage();
1669         }
1670         ts.tm_isdst = -1;
1671         return (mktime(&ts));
1672 }
1673
1674 static void parse_tune2fs_options(int argc, char **argv)
1675 {
1676         int c;
1677         char *tmp;
1678         struct group *gr;
1679         struct passwd *pw;
1680         int ret;
1681         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1682
1683         open_flag = 0;
1684         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1685         while ((c = getopt(argc, argv, optstring)) != EOF)
1686                 switch (c) {
1687                 case 'c':
1688                         max_mount_count = strtol(optarg, &tmp, 0);
1689                         if (*tmp || max_mount_count > 16000) {
1690                                 com_err(program_name, 0,
1691                                         _("bad mounts count - %s"),
1692                                         optarg);
1693                                 usage();
1694                         }
1695                         if (max_mount_count == 0)
1696                                 max_mount_count = -1;
1697                         c_flag = 1;
1698                         open_flag = EXT2_FLAG_RW;
1699                         break;
1700                 case 'C':
1701                         mount_count = strtoul(optarg, &tmp, 0);
1702                         if (*tmp || mount_count > 16000) {
1703                                 com_err(program_name, 0,
1704                                         _("bad mounts count - %s"),
1705                                         optarg);
1706                                 usage();
1707                         }
1708                         C_flag = 1;
1709                         open_flag = EXT2_FLAG_RW;
1710                         break;
1711                 case 'e':
1712                         if (strcmp(optarg, "continue") == 0)
1713                                 errors = EXT2_ERRORS_CONTINUE;
1714                         else if (strcmp(optarg, "remount-ro") == 0)
1715                                 errors = EXT2_ERRORS_RO;
1716                         else if (strcmp(optarg, "panic") == 0)
1717                                 errors = EXT2_ERRORS_PANIC;
1718                         else {
1719                                 com_err(program_name, 0,
1720                                         _("bad error behavior - %s"),
1721                                         optarg);
1722                                 usage();
1723                         }
1724                         e_flag = 1;
1725                         open_flag = EXT2_FLAG_RW;
1726                         break;
1727                 case 'E':
1728                         extended_cmd = optarg;
1729                         open_flag |= EXT2_FLAG_RW;
1730                         break;
1731                 case 'f': /* Force */
1732                         f_flag++;
1733                         break;
1734                 case 'g':
1735                         resgid = strtoul(optarg, &tmp, 0);
1736                         if (*tmp) {
1737                                 gr = getgrnam(optarg);
1738                                 if (gr == NULL)
1739                                         tmp = optarg;
1740                                 else {
1741                                         resgid = gr->gr_gid;
1742                                         *tmp = 0;
1743                                 }
1744                         }
1745                         if (*tmp) {
1746                                 com_err(program_name, 0,
1747                                         _("bad gid/group name - %s"),
1748                                         optarg);
1749                                 usage();
1750                         }
1751                         g_flag = 1;
1752                         open_flag = EXT2_FLAG_RW;
1753                         break;
1754                 case 'i':
1755                         interval = strtoul(optarg, &tmp, 0);
1756                         switch (*tmp) {
1757                         case 's':
1758                                 tmp++;
1759                                 break;
1760                         case '\0':
1761                         case 'd':
1762                         case 'D': /* days */
1763                                 interval *= 86400;
1764                                 if (*tmp != '\0')
1765                                         tmp++;
1766                                 break;
1767                         case 'm':
1768                         case 'M': /* months! */
1769                                 interval *= 86400 * 30;
1770                                 tmp++;
1771                                 break;
1772                         case 'w':
1773                         case 'W': /* weeks */
1774                                 interval *= 86400 * 7;
1775                                 tmp++;
1776                                 break;
1777                         }
1778                         if (*tmp) {
1779                                 com_err(program_name, 0,
1780                                         _("bad interval - %s"), optarg);
1781                                 usage();
1782                         }
1783                         i_flag = 1;
1784                         open_flag = EXT2_FLAG_RW;
1785                         break;
1786                 case 'j':
1787                         if (!journal_size)
1788                                 journal_size = -1;
1789                         open_flag = EXT2_FLAG_RW;
1790                         break;
1791                 case 'J':
1792                         parse_journal_opts(optarg);
1793                         open_flag = EXT2_FLAG_RW;
1794                         break;
1795                 case 'l':
1796                         l_flag = 1;
1797                         break;
1798                 case 'L':
1799                         new_label = optarg;
1800                         L_flag = 1;
1801                         open_flag |= EXT2_FLAG_RW |
1802                                 EXT2_FLAG_JOURNAL_DEV_OK;
1803                         break;
1804                 case 'm':
1805                         reserved_ratio = strtod(optarg, &tmp);
1806                         if (*tmp || reserved_ratio > 50 ||
1807                             reserved_ratio < 0) {
1808                                 com_err(program_name, 0,
1809                                         _("bad reserved block ratio - %s"),
1810                                         optarg);
1811                                 usage();
1812                         }
1813                         m_flag = 1;
1814                         open_flag = EXT2_FLAG_RW;
1815                         break;
1816                 case 'M':
1817                         new_last_mounted = optarg;
1818                         M_flag = 1;
1819                         open_flag = EXT2_FLAG_RW;
1820                         break;
1821                 case 'o':
1822                         if (mntopts_cmd) {
1823                                 com_err(program_name, 0, "%s",
1824                                         _("-o may only be specified once"));
1825                                 usage();
1826                         }
1827                         mntopts_cmd = optarg;
1828                         open_flag = EXT2_FLAG_RW;
1829                         break;
1830                 case 'O':
1831                         if (features_cmd) {
1832                                 com_err(program_name, 0, "%s",
1833                                         _("-O may only be specified once"));
1834                                 usage();
1835                         }
1836                         features_cmd = optarg;
1837                         open_flag = EXT2_FLAG_RW;
1838                         break;
1839                 case 'Q':
1840                         Q_flag = 1;
1841                         ret = parse_quota_opts(optarg, option_handle_function);
1842                         if (ret)
1843                                 exit(1);
1844                         open_flag = EXT2_FLAG_RW;
1845                         break;
1846                 case 'r':
1847                         reserved_blocks = strtoul(optarg, &tmp, 0);
1848                         if (*tmp) {
1849                                 com_err(program_name, 0,
1850                                         _("bad reserved blocks count - %s"),
1851                                         optarg);
1852                                 usage();
1853                         }
1854                         r_flag = 1;
1855                         open_flag = EXT2_FLAG_RW;
1856                         break;
1857                 case 's': /* Deprecated */
1858                         s_flag = atoi(optarg);
1859                         open_flag = EXT2_FLAG_RW;
1860                         break;
1861                 case 'T':
1862                         T_flag = 1;
1863                         last_check_time = parse_time(optarg);
1864                         open_flag = EXT2_FLAG_RW;
1865                         break;
1866                 case 'u':
1867                                 resuid = strtoul(optarg, &tmp, 0);
1868                                 if (*tmp) {
1869                                         pw = getpwnam(optarg);
1870                                         if (pw == NULL)
1871                                                 tmp = optarg;
1872                                         else {
1873                                                 resuid = pw->pw_uid;
1874                                                 *tmp = 0;
1875                                         }
1876                                 }
1877                                 if (*tmp) {
1878                                         com_err(program_name, 0,
1879                                                 _("bad uid/user name - %s"),
1880                                                 optarg);
1881                                         usage();
1882                                 }
1883                                 u_flag = 1;
1884                                 open_flag = EXT2_FLAG_RW;
1885                                 break;
1886                 case 'U':
1887                         new_UUID = optarg;
1888                         U_flag = 1;
1889                         open_flag = EXT2_FLAG_RW |
1890                                 EXT2_FLAG_JOURNAL_DEV_OK;
1891                         break;
1892                 case 'I':
1893                         new_inode_size = strtoul(optarg, &tmp, 0);
1894                         if (*tmp) {
1895                                 com_err(program_name, 0,
1896                                         _("bad inode size - %s"),
1897                                         optarg);
1898                                 usage();
1899                         }
1900                         if (!((new_inode_size &
1901                                (new_inode_size - 1)) == 0)) {
1902                                 com_err(program_name, 0,
1903                                         _("Inode size must be a "
1904                                           "power of two- %s"),
1905                                         optarg);
1906                                 usage();
1907                         }
1908                         open_flag = EXT2_FLAG_RW;
1909                         I_flag = 1;
1910                         break;
1911                 case 'z':
1912                         undo_file = optarg;
1913                         break;
1914                 default:
1915                         usage();
1916                 }
1917         if (optind < argc - 1 || optind == argc)
1918                 usage();
1919         if (!open_flag && !l_flag)
1920                 usage();
1921         io_options = strchr(argv[optind], '?');
1922         if (io_options)
1923                 *io_options++ = 0;
1924         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1925         if (!device_name) {
1926                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1927                         argv[optind]);
1928                 exit(1);
1929         }
1930 }
1931
1932 #ifdef CONFIG_BUILD_FINDFS
1933 void do_findfs(int argc, char **argv)
1934 {
1935         char    *dev;
1936
1937         if ((argc != 2) ||
1938             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1939                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1940                 exit(2);
1941         }
1942         dev = blkid_get_devname(NULL, argv[1], NULL);
1943         if (!dev) {
1944                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1945                         argv[1]);
1946                 exit(1);
1947         }
1948         puts(dev);
1949         exit(0);
1950 }
1951 #endif
1952
1953 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1954 {
1955         char    *buf, *token, *next, *p, *arg;
1956         int     len, hash_alg;
1957         int     r_usage = 0;
1958
1959         len = strlen(opts);
1960         buf = malloc(len+1);
1961         if (!buf) {
1962                 fprintf(stderr, "%s",
1963                         _("Couldn't allocate memory to parse options!\n"));
1964                 return 1;
1965         }
1966         strcpy(buf, opts);
1967         for (token = buf; token && *token; token = next) {
1968                 p = strchr(token, ',');
1969                 next = 0;
1970                 if (p) {
1971                         *p = 0;
1972                         next = p+1;
1973                 }
1974                 arg = strchr(token, '=');
1975                 if (arg) {
1976                         *arg = 0;
1977                         arg++;
1978                 }
1979                 if (strcmp(token, "clear-mmp") == 0 ||
1980                     strcmp(token, "clear_mmp") == 0) {
1981                         clear_mmp = 1;
1982                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1983                         unsigned long intv;
1984                         if (!arg) {
1985                                 r_usage++;
1986                                 continue;
1987                         }
1988                         intv = strtoul(arg, &p, 0);
1989                         if (*p) {
1990                                 fprintf(stderr,
1991                                         _("Invalid mmp_update_interval: %s\n"),
1992                                         arg);
1993                                 r_usage++;
1994                                 continue;
1995                         }
1996                         if (intv == 0) {
1997                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1998                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1999                                 fprintf(stderr,
2000                                         _("mmp_update_interval too big: %lu\n"),
2001                                         intv);
2002                                 r_usage++;
2003                                 continue;
2004                         }
2005                         printf(P_("Setting multiple mount protection update "
2006                                   "interval to %lu second\n",
2007                                   "Setting multiple mount protection update "
2008                                   "interval to %lu seconds\n", intv),
2009                                intv);
2010                         fs->super->s_mmp_update_interval = intv;
2011                         ext2fs_mark_super_dirty(fs);
2012                 } else if (!strcmp(token, "test_fs")) {
2013                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2014                         printf("Setting test filesystem flag\n");
2015                         ext2fs_mark_super_dirty(fs);
2016                 } else if (!strcmp(token, "^test_fs")) {
2017                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2018                         printf("Clearing test filesystem flag\n");
2019                         ext2fs_mark_super_dirty(fs);
2020                 } else if (strcmp(token, "stride") == 0) {
2021                         if (!arg) {
2022                                 r_usage++;
2023                                 continue;
2024                         }
2025                         stride = strtoul(arg, &p, 0);
2026                         if (*p) {
2027                                 fprintf(stderr,
2028                                         _("Invalid RAID stride: %s\n"),
2029                                         arg);
2030                                 r_usage++;
2031                                 continue;
2032                         }
2033                         stride_set = 1;
2034                 } else if (strcmp(token, "stripe-width") == 0 ||
2035                            strcmp(token, "stripe_width") == 0) {
2036                         if (!arg) {
2037                                 r_usage++;
2038                                 continue;
2039                         }
2040                         stripe_width = strtoul(arg, &p, 0);
2041                         if (*p) {
2042                                 fprintf(stderr,
2043                                         _("Invalid RAID stripe-width: %s\n"),
2044                                         arg);
2045                                 r_usage++;
2046                                 continue;
2047                         }
2048                         stripe_width_set = 1;
2049                 } else if (strcmp(token, "hash_alg") == 0 ||
2050                            strcmp(token, "hash-alg") == 0) {
2051                         if (!arg) {
2052                                 r_usage++;
2053                                 continue;
2054                         }
2055                         hash_alg = e2p_string2hash(arg);
2056                         if (hash_alg < 0) {
2057                                 fprintf(stderr,
2058                                         _("Invalid hash algorithm: %s\n"),
2059                                         arg);
2060                                 r_usage++;
2061                                 continue;
2062                         }
2063                         fs->super->s_def_hash_version = hash_alg;
2064                         printf(_("Setting default hash algorithm "
2065                                  "to %s (%d)\n"),
2066                                arg, hash_alg);
2067                         ext2fs_mark_super_dirty(fs);
2068                 } else if (!strcmp(token, "mount_opts")) {
2069                         if (!arg) {
2070                                 r_usage++;
2071                                 continue;
2072                         }
2073                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2074                                 fprintf(stderr,
2075                                         "Extended mount options too long\n");
2076                                 continue;
2077                         }
2078                         ext_mount_opts = strdup(arg);
2079                 } else
2080                         r_usage++;
2081         }
2082         if (r_usage) {
2083                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2084                         "Extended options are separated by commas, "
2085                         "and may take an argument which\n"
2086                         "\tis set off by an equals ('=') sign.\n\n"
2087                         "Valid extended options are:\n"
2088                         "\tclear_mmp\n"
2089                         "\thash_alg=<hash algorithm>\n"
2090                         "\tmount_opts=<extended default mount options>\n"
2091                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2092                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2093                         "\ttest_fs\n"
2094                         "\t^test_fs\n"));
2095                 free(buf);
2096                 return 1;
2097         }
2098         free(buf);
2099
2100         return 0;
2101 }
2102
2103 /*
2104  * Fill in the block bitmap bmap with the information regarding the
2105  * blocks to be moved
2106  */
2107 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2108                             ext2fs_block_bitmap bmap)
2109 {
2110         dgrp_t i;
2111         int retval;
2112         ext2_badblocks_list bb_list = 0;
2113         blk64_t j, needed_blocks = 0;
2114         blk64_t start_blk, end_blk;
2115
2116         retval = ext2fs_read_bb_inode(fs, &bb_list);
2117         if (retval)
2118                 return retval;
2119
2120         for (i = 0; i < fs->group_desc_count; i++) {
2121                 start_blk = ext2fs_inode_table_loc(fs, i) +
2122                                         fs->inode_blocks_per_group;
2123
2124                 end_blk = ext2fs_inode_table_loc(fs, i) +
2125                                         new_ino_blks_per_grp;
2126
2127                 for (j = start_blk; j < end_blk; j++) {
2128                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2129                                 /*
2130                                  * IF the block is a bad block we fail
2131                                  */
2132                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2133                                         ext2fs_badblocks_list_free(bb_list);
2134                                         return ENOSPC;
2135                                 }
2136
2137                                 ext2fs_mark_block_bitmap2(bmap, j);
2138                         } else {
2139                                 /*
2140                                  * We are going to use this block for
2141                                  * inode table. So mark them used.
2142                                  */
2143                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2144                         }
2145                 }
2146                 needed_blocks += end_blk - start_blk;
2147         }
2148
2149         ext2fs_badblocks_list_free(bb_list);
2150         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2151                 return ENOSPC;
2152
2153         return 0;
2154 }
2155
2156 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2157 {
2158         dgrp_t group;
2159         group = ext2fs_group_of_blk2(fs, blk);
2160         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2161                 return 1;
2162         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2163                 return 1;
2164         return 0;
2165 }
2166
2167 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2168 {
2169         blk64_t start_blk, end_blk;
2170         start_blk = fs->super->s_first_data_block +
2171                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2172         /*
2173          * We cannot get new block beyond end_blk for for the last block group
2174          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2175          */
2176         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2177         if (blk >= start_blk && blk <= end_blk)
2178                 return 1;
2179         return 0;
2180 }
2181
2182 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2183 {
2184
2185         char *buf;
2186         dgrp_t group = 0;
2187         errcode_t retval;
2188         int meta_data = 0;
2189         blk64_t blk, new_blk, goal;
2190         struct blk_move *bmv;
2191
2192         retval = ext2fs_get_mem(fs->blocksize, &buf);
2193         if (retval)
2194                 return retval;
2195
2196         for (new_blk = blk = fs->super->s_first_data_block;
2197              blk < ext2fs_blocks_count(fs->super); blk++) {
2198                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2199                         continue;
2200
2201                 if (ext2fs_is_meta_block(fs, blk)) {
2202                         /*
2203                          * If the block is mapping a fs meta data block
2204                          * like group desc/block bitmap/inode bitmap. We
2205                          * should find a block in the same group and fix
2206                          * the respective fs metadata pointers. Otherwise
2207                          * fail
2208                          */
2209                         group = ext2fs_group_of_blk2(fs, blk);
2210                         goal = ext2fs_group_first_block2(fs, group);
2211                         meta_data = 1;
2212
2213                 } else {
2214                         goal = new_blk;
2215                 }
2216                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2217                 if (retval)
2218                         goto err_out;
2219
2220                 /* new fs meta data block should be in the same group */
2221                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2222                         retval = ENOSPC;
2223                         goto err_out;
2224                 }
2225
2226                 /* Mark this block as allocated */
2227                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2228
2229                 /* Add it to block move list */
2230                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2231                 if (retval)
2232                         goto err_out;
2233
2234                 bmv->old_loc = blk;
2235                 bmv->new_loc = new_blk;
2236
2237                 list_add(&(bmv->list), &blk_move_list);
2238
2239                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2240                 if (retval)
2241                         goto err_out;
2242
2243                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2244                 if (retval)
2245                         goto err_out;
2246         }
2247
2248 err_out:
2249         ext2fs_free_mem(&buf);
2250         return retval;
2251 }
2252
2253 static blk64_t translate_block(blk64_t blk)
2254 {
2255         struct list_head *entry;
2256         struct blk_move *bmv;
2257
2258         list_for_each(entry, &blk_move_list) {
2259                 bmv = list_entry(entry, struct blk_move, list);
2260                 if (bmv->old_loc == blk)
2261                         return bmv->new_loc;
2262         }
2263
2264         return 0;
2265 }
2266
2267 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2268                          blk64_t *block_nr,
2269                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2270                          blk64_t ref_block EXT2FS_ATTR((unused)),
2271                          int ref_offset EXT2FS_ATTR((unused)),
2272                          void *priv_data)
2273 {
2274         int ret = 0;
2275         blk64_t new_blk;
2276         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2277
2278         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2279                 return 0;
2280         new_blk = translate_block(*block_nr);
2281         if (new_blk) {
2282                 *block_nr = new_blk;
2283                 /*
2284                  * This will force the ext2fs_write_inode in the iterator
2285                  */
2286                 ret |= BLOCK_CHANGED;
2287         }
2288
2289         return ret;
2290 }
2291
2292 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2293 {
2294         errcode_t retval = 0;
2295         ext2_ino_t ino;
2296         blk64_t blk;
2297         char *block_buf = 0;
2298         struct ext2_inode inode;
2299         ext2_inode_scan scan = NULL;
2300
2301         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2302         if (retval)
2303                 return retval;
2304
2305         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2306         if (retval)
2307                 goto err_out;
2308
2309         while (1) {
2310                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2311                 if (retval)
2312                         goto err_out;
2313
2314                 if (!ino)
2315                         break;
2316
2317                 if (inode.i_links_count == 0)
2318                         continue; /* inode not in use */
2319
2320                 /* FIXME!!
2321                  * If we end up modifying the journal inode
2322                  * the sb->s_jnl_blocks will differ. But a
2323                  * subsequent e2fsck fixes that.
2324                  * Do we need to fix this ??
2325                  */
2326
2327                 if (ext2fs_file_acl_block(fs, &inode) &&
2328                     ext2fs_test_block_bitmap2(bmap,
2329                                         ext2fs_file_acl_block(fs, &inode))) {
2330                         blk = translate_block(ext2fs_file_acl_block(fs,
2331                                                                     &inode));
2332                         if (!blk)
2333                                 continue;
2334
2335                         ext2fs_file_acl_block_set(fs, &inode, blk);
2336
2337                         /*
2338                          * Write the inode to disk so that inode table
2339                          * resizing can work
2340                          */
2341                         retval = ext2fs_write_inode(fs, ino, &inode);
2342                         if (retval)
2343                                 goto err_out;
2344                 }
2345
2346                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2347                         continue;
2348
2349                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2350                                                process_block, bmap);
2351                 if (retval)
2352                         goto err_out;
2353
2354         }
2355
2356 err_out:
2357         ext2fs_free_mem(&block_buf);
2358         ext2fs_close_inode_scan(scan);
2359
2360         return retval;
2361 }
2362
2363 /*
2364  * We need to scan for inode and block bitmaps that may need to be
2365  * moved.  This can take place if the filesystem was formatted for
2366  * RAID arrays using the mke2fs's extended option "stride".
2367  */
2368 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2369 {
2370         dgrp_t i;
2371         blk64_t blk, new_blk;
2372
2373         for (i = 0; i < fs->group_desc_count; i++) {
2374                 blk = ext2fs_block_bitmap_loc(fs, i);
2375                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2376                         new_blk = translate_block(blk);
2377                         if (!new_blk)
2378                                 continue;
2379                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2380                 }
2381
2382                 blk = ext2fs_inode_bitmap_loc(fs, i);
2383                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2384                         new_blk = translate_block(blk);
2385                         if (!new_blk)
2386                                 continue;
2387                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2388                 }
2389         }
2390         return 0;
2391 }
2392
2393 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2394 {
2395         dgrp_t i;
2396         blk64_t blk;
2397         errcode_t retval;
2398         int new_ino_blks_per_grp;
2399         unsigned int j;
2400         char *old_itable = NULL, *new_itable = NULL;
2401         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2402         unsigned long old_ino_size;
2403         int old_itable_size, new_itable_size;
2404
2405         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2406         old_ino_size = EXT2_INODE_SIZE(fs->super);
2407
2408         new_ino_blks_per_grp = ext2fs_div_ceil(
2409                                         EXT2_INODES_PER_GROUP(fs->super) *
2410                                         new_ino_size,
2411                                         fs->blocksize);
2412
2413         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2414
2415         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2416         if (retval)
2417                 return retval;
2418
2419         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2420         if (retval)
2421                 goto err_out;
2422
2423         tmp_old_itable = old_itable;
2424         tmp_new_itable = new_itable;
2425
2426         for (i = 0; i < fs->group_desc_count; i++) {
2427                 blk = ext2fs_inode_table_loc(fs, i);
2428                 retval = io_channel_read_blk64(fs->io, blk,
2429                                 fs->inode_blocks_per_group, old_itable);
2430                 if (retval)
2431                         goto err_out;
2432
2433                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2434                         memcpy(new_itable, old_itable, old_ino_size);
2435
2436                         memset(new_itable+old_ino_size, 0,
2437                                         new_ino_size - old_ino_size);
2438
2439                         new_itable += new_ino_size;
2440                         old_itable += old_ino_size;
2441                 }
2442
2443                 /* reset the pointer */
2444                 old_itable = tmp_old_itable;
2445                 new_itable = tmp_new_itable;
2446
2447                 retval = io_channel_write_blk64(fs->io, blk,
2448                                         new_ino_blks_per_grp, new_itable);
2449                 if (retval)
2450                         goto err_out;
2451         }
2452
2453         /* Update the meta data */
2454         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2455         ext2fs_free_inode_cache(fs->icache);
2456         fs->icache = 0;
2457         fs->super->s_inode_size = new_ino_size;
2458
2459 err_out:
2460         if (old_itable)
2461                 ext2fs_free_mem(&old_itable);
2462
2463         if (new_itable)
2464                 ext2fs_free_mem(&new_itable);
2465
2466         return retval;
2467 }
2468
2469 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2470 {
2471         blk64_t         blk;
2472         ext2_ino_t      ino;
2473         unsigned int    group = 0;
2474         unsigned int    count = 0;
2475         int             total_free = 0;
2476         int             group_free = 0;
2477
2478         /*
2479          * First calculate the block statistics
2480          */
2481         for (blk = fs->super->s_first_data_block;
2482              blk < ext2fs_blocks_count(fs->super); blk++) {
2483                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2484                         group_free++;
2485                         total_free++;
2486                 }
2487                 count++;
2488                 if ((count == fs->super->s_blocks_per_group) ||
2489                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2490                         ext2fs_bg_free_blocks_count_set(fs, group++,
2491                                                         group_free);
2492                         count = 0;
2493                         group_free = 0;
2494                 }
2495         }
2496         total_free = EXT2FS_C2B(fs, total_free);
2497         ext2fs_free_blocks_count_set(fs->super, total_free);
2498
2499         /*
2500          * Next, calculate the inode statistics
2501          */
2502         group_free = 0;
2503         total_free = 0;
2504         count = 0;
2505         group = 0;
2506
2507         /* Protect loop from wrap-around if s_inodes_count maxed */
2508         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2509                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2510                         group_free++;
2511                         total_free++;
2512                 }
2513                 count++;
2514                 if ((count == fs->super->s_inodes_per_group) ||
2515                     (ino == fs->super->s_inodes_count)) {
2516                         ext2fs_bg_free_inodes_count_set(fs, group++,
2517                                                         group_free);
2518                         count = 0;
2519                         group_free = 0;
2520                 }
2521         }
2522         fs->super->s_free_inodes_count = total_free;
2523         ext2fs_mark_super_dirty(fs);
2524         return 0;
2525 }
2526
2527 #define list_for_each_safe(pos, pnext, head) \
2528         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2529              pos = pnext, pnext = pos->next)
2530
2531 static void free_blk_move_list(void)
2532 {
2533         struct list_head *entry, *tmp;
2534         struct blk_move *bmv;
2535
2536         list_for_each_safe(entry, tmp, &blk_move_list) {
2537                 bmv = list_entry(entry, struct blk_move, list);
2538                 list_del(entry);
2539                 ext2fs_free_mem(&bmv);
2540         }
2541         return;
2542 }
2543
2544 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2545 {
2546         errcode_t retval;
2547         int new_ino_blks_per_grp;
2548         ext2fs_block_bitmap bmap;
2549
2550         retval = ext2fs_read_inode_bitmap(fs);
2551         if (retval) {
2552                 fputs(_("Failed to read inode bitmap\n"), stderr);
2553                 return retval;
2554         }
2555         retval = ext2fs_read_block_bitmap(fs);
2556         if (retval) {
2557                 fputs(_("Failed to read block bitmap\n"), stderr);
2558                 return retval;
2559         }
2560         INIT_LIST_HEAD(&blk_move_list);
2561
2562
2563         new_ino_blks_per_grp = ext2fs_div_ceil(
2564                                         EXT2_INODES_PER_GROUP(fs->super)*
2565                                         new_size,
2566                                         fs->blocksize);
2567
2568         /* We may change the file system.
2569          * Mark the file system as invalid so that
2570          * the user is prompted to run fsck.
2571          */
2572         fs->super->s_state &= ~EXT2_VALID_FS;
2573
2574         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2575                                                 &bmap);
2576         if (retval) {
2577                 fputs(_("Failed to allocate block bitmap when "
2578                                 "increasing inode size\n"), stderr);
2579                 return retval;
2580         }
2581         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2582         if (retval) {
2583                 fputs(_("Not enough space to increase inode size \n"), stderr);
2584                 goto err_out;
2585         }
2586         retval = move_block(fs, bmap);
2587         if (retval) {
2588                 fputs(_("Failed to relocate blocks during inode resize \n"),
2589                       stderr);
2590                 goto err_out;
2591         }
2592         retval = inode_scan_and_fix(fs, bmap);
2593         if (retval)
2594                 goto err_out_undo;
2595
2596         retval = group_desc_scan_and_fix(fs, bmap);
2597         if (retval)
2598                 goto err_out_undo;
2599
2600         retval = expand_inode_table(fs, new_size);
2601         if (retval)
2602                 goto err_out_undo;
2603
2604         ext2fs_calculate_summary_stats(fs);
2605
2606         fs->super->s_state |= EXT2_VALID_FS;
2607         /* mark super block and block bitmap as dirty */
2608         ext2fs_mark_super_dirty(fs);
2609         ext2fs_mark_bb_dirty(fs);
2610
2611 err_out:
2612         free_blk_move_list();
2613         ext2fs_free_block_bitmap(bmap);
2614
2615         return retval;
2616
2617 err_out_undo:
2618         free_blk_move_list();
2619         ext2fs_free_block_bitmap(bmap);
2620         fputs(_("Error in resizing the inode size.\n"
2621                         "Run e2undo to undo the "
2622                         "file system changes. \n"), stderr);
2623
2624         return retval;
2625 }
2626
2627 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2628 {
2629         errcode_t retval = 0;
2630         const char *tdb_dir;
2631         char *tdb_file = NULL;
2632         char *dev_name, *tmp_name;
2633
2634         /* (re)open a specific undo file */
2635         if (undo_file && undo_file[0] != 0) {
2636                 retval = set_undo_io_backing_manager(*io_ptr);
2637                 if (retval)
2638                         goto err;
2639                 *io_ptr = undo_io_manager;
2640                 retval = set_undo_io_backup_file(undo_file);
2641                 if (retval)
2642                         goto err;
2643                 printf(_("Overwriting existing filesystem; this can be undone "
2644                          "using the command:\n"
2645                          "    e2undo %s %s\n\n"),
2646                          undo_file, name);
2647                 return retval;
2648         }
2649
2650         /*
2651          * Configuration via a conf file would be
2652          * nice
2653          */
2654         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2655         if (!tdb_dir)
2656                 tdb_dir = "/var/lib/e2fsprogs";
2657
2658         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2659             access(tdb_dir, W_OK))
2660                 return 0;
2661
2662         tmp_name = strdup(name);
2663         if (!tmp_name)
2664                 goto errout;
2665         dev_name = basename(tmp_name);
2666         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2667         if (!tdb_file) {
2668                 free(tmp_name);
2669                 goto errout;
2670         }
2671         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2672         free(tmp_name);
2673
2674         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2675                 retval = errno;
2676                 com_err(program_name, retval,
2677                         _("while trying to delete %s"), tdb_file);
2678                 goto errout;
2679         }
2680
2681         retval = set_undo_io_backing_manager(*io_ptr);
2682         if (retval)
2683                 goto errout;
2684         *io_ptr = undo_io_manager;
2685         retval = set_undo_io_backup_file(tdb_file);
2686         if (retval)
2687                 goto errout;
2688         printf(_("Overwriting existing filesystem; this can be undone "
2689                  "using the command:\n"
2690                  "    e2undo %s %s\n\n"),
2691                  tdb_file, name);
2692
2693         free(tdb_file);
2694         return 0;
2695 errout:
2696         free(tdb_file);
2697 err:
2698         com_err("tune2fs", retval, "while trying to setup undo file\n");
2699         return retval;
2700 }
2701
2702 static int
2703 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2704 {
2705         int retval, nr_users, start;
2706         journal_superblock_t *jsb;
2707         ext2_filsys jfs;
2708         __u8 *j_uuid;
2709         char *journal_path;
2710         char uuid[UUID_STR_SIZE];
2711         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2712
2713         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2714                 return 0;
2715
2716         uuid_unparse(sb->s_journal_uuid, uuid);
2717         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2718         if (!journal_path)
2719                 return 0;
2720
2721         retval = ext2fs_open2(journal_path, io_options,
2722                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2723                               0, 0, unix_io_manager, &jfs);
2724         if (retval) {
2725                 com_err(program_name, retval,
2726                         _("while trying to open %s"),
2727                         journal_path);
2728                 return retval;
2729         }
2730
2731         retval = get_journal_sb(jfs, buf);
2732         if (retval != 0) {
2733                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2734                         fprintf(stderr, _("%s is not a journal device.\n"),
2735                                 journal_path);
2736                 return retval;
2737         }
2738
2739         jsb = (journal_superblock_t *) buf;
2740         /* Find the filesystem UUID */
2741         nr_users = ntohl(jsb->s_nr_users);
2742
2743         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2744         if (j_uuid == NULL) {
2745                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2746                       stderr);
2747                 return EXT2_ET_LOAD_EXT_JOURNAL;
2748         }
2749
2750         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2751
2752         start = ext2fs_journal_sb_start(jfs->blocksize);
2753         /* Write back the journal superblock */
2754         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2755         if (retval != 0) {
2756                 com_err(program_name, retval,
2757                         "while writing journal superblock.");
2758                 return retval;
2759         }
2760
2761         ext2fs_close(jfs);
2762
2763         return 0;
2764 }
2765
2766 #ifndef BUILD_AS_LIB
2767 int main(int argc, char **argv)
2768 #else
2769 int tune2fs_main(int argc, char **argv)
2770 #endif  /* BUILD_AS_LIB */
2771 {
2772         errcode_t retval;
2773         ext2_filsys fs;
2774         struct ext2_super_block *sb;
2775         io_manager io_ptr, io_ptr_orig = NULL;
2776         int rc = 0;
2777         char default_undo_file[1] = { 0 };
2778
2779 #ifdef ENABLE_NLS
2780         setlocale(LC_MESSAGES, "");
2781         setlocale(LC_CTYPE, "");
2782         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2783         textdomain(NLS_CAT_NAME);
2784         set_com_err_gettext(gettext);
2785 #endif
2786         if (argc && *argv)
2787                 program_name = *argv;
2788         add_error_table(&et_ext2_error_table);
2789
2790 #ifdef CONFIG_BUILD_FINDFS
2791         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2792                 do_findfs(argc, argv);
2793 #endif
2794         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2795                 parse_e2label_options(argc, argv);
2796         else
2797                 parse_tune2fs_options(argc, argv);
2798
2799 #ifdef CONFIG_TESTIO_DEBUG
2800         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2801                 io_ptr = test_io_manager;
2802                 test_io_backing_manager = unix_io_manager;
2803         } else
2804 #endif
2805                 io_ptr = unix_io_manager;
2806
2807 retry_open:
2808         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2809                 open_flag |= EXT2_FLAG_SKIP_MMP;
2810
2811         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2812
2813         /* keep the filesystem struct around to dump MMP data */
2814         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2815
2816         retval = ext2fs_open2(device_name, io_options, open_flag,
2817                               0, 0, io_ptr, &fs);
2818         if (retval) {
2819                 com_err(program_name, retval,
2820                         _("while trying to open %s"),
2821                         device_name);
2822                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2823                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2824                         dump_mmp_msg(fs->mmp_buf,
2825                                      _("If you are sure the filesystem "
2826                                        "is not in use on any node, run:\n"
2827                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2828                 else if (retval == EXT2_ET_MMP_FAILED)
2829                         dump_mmp_msg(fs->mmp_buf, NULL);
2830                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2831                         fprintf(stderr,
2832                                 _("MMP block magic is bad. Try to fix it by "
2833                                   "running:\n'e2fsck -f %s'\n"), device_name);
2834                 else if (retval == EXT2_ET_BAD_MAGIC)
2835                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2836                 else if (retval != EXT2_ET_MMP_FAILED)
2837                         fprintf(stderr, "%s",
2838                              _("Couldn't find valid filesystem superblock.\n"));
2839
2840                 ext2fs_free(fs);
2841                 exit(1);
2842         }
2843         if (ext2fs_has_feature_journal_dev(fs->super)) {
2844                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2845                 ext2fs_free(fs);
2846                 exit(1);
2847         }
2848         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2849
2850         if (I_flag) {
2851                 /*
2852                  * Check the inode size is right so we can issue an
2853                  * error message and bail before setting up the tdb
2854                  * file.
2855                  */
2856                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2857                         fprintf(stderr, _("The inode size is already %lu\n"),
2858                                 new_inode_size);
2859                         rc = 1;
2860                         goto closefs;
2861                 }
2862                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2863                         fprintf(stderr, "%s",
2864                                 _("Shrinking inode size is not supported\n"));
2865                         rc = 1;
2866                         goto closefs;
2867                 }
2868                 if (new_inode_size > fs->blocksize) {
2869                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2870                                 new_inode_size, fs->blocksize);
2871                         rc = 1;
2872                         goto closefs;
2873                 }
2874                 check_fsck_needed(fs,
2875                         _("Resizing inodes could take some time."));
2876                 /*
2877                  * If inode resize is requested use the
2878                  * Undo I/O manager
2879                  */
2880                 undo_file = default_undo_file;
2881         }
2882
2883         /* Set up an undo file */
2884         if (undo_file && io_ptr_orig == NULL) {
2885                 io_ptr_orig = io_ptr;
2886                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2887                 if (retval) {
2888                         rc = 1;
2889                         goto closefs;
2890                 }
2891                 if (io_ptr != io_ptr_orig) {
2892                         ext2fs_close_free(&fs);
2893                         goto retry_open;
2894                 }
2895         }
2896
2897         sb = fs->super;
2898         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2899
2900         if (print_label) {
2901                 /* For e2label emulation */
2902                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2903                        sb->s_volume_name);
2904                 remove_error_table(&et_ext2_error_table);
2905                 goto closefs;
2906         }
2907
2908         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2909         if (retval) {
2910                 com_err("ext2fs_check_if_mount", retval,
2911                         _("while determining whether %s is mounted."),
2912                         device_name);
2913                 rc = 1;
2914                 goto closefs;
2915         }
2916         /* Normally we only need to write out the superblock */
2917         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2918
2919         if (c_flag) {
2920                 sb->s_max_mnt_count = max_mount_count;
2921                 ext2fs_mark_super_dirty(fs);
2922                 printf(_("Setting maximal mount count to %d\n"),
2923                        max_mount_count);
2924         }
2925         if (C_flag) {
2926                 sb->s_mnt_count = mount_count;
2927                 ext2fs_mark_super_dirty(fs);
2928                 printf(_("Setting current mount count to %d\n"), mount_count);
2929         }
2930         if (e_flag) {
2931                 sb->s_errors = errors;
2932                 ext2fs_mark_super_dirty(fs);
2933                 printf(_("Setting error behavior to %d\n"), errors);
2934         }
2935         if (g_flag) {
2936                 sb->s_def_resgid = resgid;
2937                 ext2fs_mark_super_dirty(fs);
2938                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2939         }
2940         if (i_flag) {
2941                 if ((unsigned long long)interval >= (1ULL << 32)) {
2942                         com_err(program_name, 0,
2943                                 _("interval between checks is too big (%lu)"),
2944                                 interval);
2945                         rc = 1;
2946                         goto closefs;
2947                 }
2948                 sb->s_checkinterval = interval;
2949                 ext2fs_mark_super_dirty(fs);
2950                 printf(_("Setting interval between checks to %lu seconds\n"),
2951                        interval);
2952         }
2953         if (m_flag) {
2954                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2955                                           ext2fs_blocks_count(sb) / 100.0);
2956                 ext2fs_mark_super_dirty(fs);
2957                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2958                         reserved_ratio, ext2fs_r_blocks_count(sb));
2959         }
2960         if (r_flag) {
2961                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2962                         com_err(program_name, 0,
2963                                 _("reserved blocks count is too big (%llu)"),
2964                                 reserved_blocks);
2965                         rc = 1;
2966                         goto closefs;
2967                 }
2968                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2969                 ext2fs_mark_super_dirty(fs);
2970                 printf(_("Setting reserved blocks count to %llu\n"),
2971                        reserved_blocks);
2972         }
2973         if (s_flag == 1) {
2974                 if (ext2fs_has_feature_sparse_super(sb)) {
2975                         fputs(_("\nThe filesystem already has sparse "
2976                                 "superblocks.\n"), stderr);
2977                 } else if (ext2fs_has_feature_meta_bg(sb)) {
2978                         fputs(_("\nSetting the sparse superblock flag not "
2979                                 "supported\nfor filesystems with "
2980                                 "the meta_bg feature enabled.\n"),
2981                                 stderr);
2982                         rc = 1;
2983                         goto closefs;
2984                 } else {
2985                         ext2fs_set_feature_sparse_super(sb);
2986                         sb->s_state &= ~EXT2_VALID_FS;
2987                         ext2fs_mark_super_dirty(fs);
2988                         printf(_("\nSparse superblock flag set.  %s"),
2989                                _(please_fsck));
2990                 }
2991         }
2992         if (s_flag == 0) {
2993                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2994                       stderr);
2995                 rc = 1;
2996                 goto closefs;
2997         }
2998         if (T_flag) {
2999                 sb->s_lastcheck = last_check_time;
3000                 ext2fs_mark_super_dirty(fs);
3001                 printf(_("Setting time filesystem last checked to %s\n"),
3002                        ctime(&last_check_time));
3003         }
3004         if (u_flag) {
3005                 sb->s_def_resuid = resuid;
3006                 ext2fs_mark_super_dirty(fs);
3007                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3008         }
3009         if (L_flag) {
3010                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3011                         fputs(_("Warning: label too long, truncating.\n"),
3012                               stderr);
3013                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3014                 strncpy(sb->s_volume_name, new_label,
3015                         sizeof(sb->s_volume_name));
3016                 ext2fs_mark_super_dirty(fs);
3017         }
3018         if (M_flag) {
3019                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3020                 strncpy(sb->s_last_mounted, new_last_mounted,
3021                         sizeof(sb->s_last_mounted));
3022                 ext2fs_mark_super_dirty(fs);
3023         }
3024         if (mntopts_cmd) {
3025                 rc = update_mntopts(fs, mntopts_cmd);
3026                 if (rc)
3027                         goto closefs;
3028         }
3029         if (features_cmd) {
3030                 rc = update_feature_set(fs, features_cmd);
3031                 if (rc)
3032                         goto closefs;
3033         }
3034         if (extended_cmd) {
3035                 rc = parse_extended_opts(fs, extended_cmd);
3036                 if (rc)
3037                         goto closefs;
3038                 if (clear_mmp && !f_flag) {
3039                         fputs(_("Error in using clear_mmp. "
3040                                 "It must be used with -f\n"),
3041                               stderr);
3042                         goto closefs;
3043                 }
3044         }
3045         if (clear_mmp) {
3046                 rc = ext2fs_mmp_clear(fs);
3047                 goto closefs;
3048         }
3049         if (journal_size || journal_device) {
3050                 rc = add_journal(fs);
3051                 if (rc)
3052                         goto closefs;
3053         }
3054
3055         if (Q_flag) {
3056                 if (mount_flags & EXT2_MF_MOUNTED) {
3057                         fputs(_("The quota feature may only be changed when "
3058                                 "the filesystem is unmounted.\n"), stderr);
3059                         rc = 1;
3060                         goto closefs;
3061                 }
3062                 handle_quota_options(fs);
3063         }
3064
3065         if (U_flag) {
3066                 int set_csum = 0;
3067                 dgrp_t i;
3068                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3069                 __u8 old_uuid[UUID_SIZE];
3070
3071                 if (ext2fs_has_group_desc_csum(fs)) {
3072                         /*
3073                          * Changing the UUID on a metadata_csum FS requires
3074                          * rewriting all metadata, which can race with a
3075                          * mounted fs.  Don't allow that unless we're saving
3076                          * the checksum seed.
3077                          */
3078                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3079                             !ext2fs_has_feature_csum_seed(fs->super) &&
3080                             ext2fs_has_feature_metadata_csum(fs->super)) {
3081                                 fputs(_("The UUID may only be "
3082                                         "changed when the filesystem is "
3083                                         "unmounted.\n"), stderr);
3084                                 fputs(_("If you only use kernels newer than "
3085                                         "v4.4, run 'tune2fs -O "
3086                                         "metadata_csum_seed' and re-run this "
3087                                         "command.\n"), stderr);
3088                                 try_confirm_csum_seed_support();
3089                                 exit(1);
3090                         }
3091                         if (!ext2fs_has_feature_csum_seed(fs->super))
3092                                 check_fsck_needed(fs,
3093                                         _("Setting UUID on a checksummed "
3094                                           "filesystem could take some time."));
3095
3096                         /*
3097                          * Determine if the block group checksums are
3098                          * correct so we know whether or not to set
3099                          * them later on.
3100                          */
3101                         for (i = 0; i < fs->group_desc_count; i++)
3102                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3103                                         break;
3104                         if (i >= fs->group_desc_count)
3105                                 set_csum = 1;
3106                 }
3107
3108                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3109                 if ((strcasecmp(new_UUID, "null") == 0) ||
3110                     (strcasecmp(new_UUID, "clear") == 0)) {
3111                         uuid_clear(sb->s_uuid);
3112                 } else if (strcasecmp(new_UUID, "time") == 0) {
3113                         uuid_generate_time(sb->s_uuid);
3114                 } else if (strcasecmp(new_UUID, "random") == 0) {
3115                         uuid_generate(sb->s_uuid);
3116                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3117                         com_err(program_name, 0, "%s",
3118                                 _("Invalid UUID format\n"));
3119                         rc = 1;
3120                         goto closefs;
3121                 }
3122                 ext2fs_init_csum_seed(fs);
3123                 if (set_csum) {
3124                         for (i = 0; i < fs->group_desc_count; i++)
3125                                 ext2fs_group_desc_csum_set(fs, i);
3126                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3127                 }
3128
3129                 /* If this is a journal dev, we need to copy UUID into jsb */
3130                 if (!(rc = get_journal_sb(fs, buf))) {
3131                         journal_superblock_t *jsb;
3132
3133                         jsb = (journal_superblock_t *) buf;
3134                         fputs(_("Need to update journal superblock.\n"), stdout);
3135                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3136
3137                         /* Writeback the journal superblock */
3138                         if ((rc = io_channel_write_blk64(fs->io,
3139                                 ext2fs_journal_sb_start(fs->blocksize),
3140                                         -SUPERBLOCK_SIZE, buf)))
3141                                 goto closefs;
3142                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3143                         goto closefs;
3144                 else {
3145                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3146
3147                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3148                                 goto closefs;
3149                 }
3150
3151                 ext2fs_mark_super_dirty(fs);
3152                 if (ext2fs_has_feature_metadata_csum(fs->super) &&
3153                     !ext2fs_has_feature_csum_seed(fs->super))
3154                         rewrite_checksums = 1;
3155         }
3156
3157         if (I_flag) {
3158                 if (mount_flags & EXT2_MF_MOUNTED) {
3159                         fputs(_("The inode size may only be "
3160                                 "changed when the filesystem is "
3161                                 "unmounted.\n"), stderr);
3162                         rc = 1;
3163                         goto closefs;
3164                 }
3165                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3166                         fputs(_("Changing the inode size not supported for "
3167                                 "filesystems with the flex_bg\n"
3168                                 "feature enabled.\n"),
3169                               stderr);
3170                         rc = 1;
3171                         goto closefs;
3172                 }
3173                 /*
3174                  * We want to update group descriptor also
3175                  * with the new free inode count
3176                  */
3177                 if (rewrite_checksums)
3178                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3179                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3180                 retval = resize_inode(fs, new_inode_size);
3181                 if (rewrite_checksums)
3182                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3183                 if (retval == 0) {
3184                         printf(_("Setting inode size %lu\n"),
3185                                                         new_inode_size);
3186                         rewrite_checksums = 1;
3187                 } else {
3188                         printf("%s", _("Failed to change inode size\n"));
3189                         rc = 1;
3190                         goto closefs;
3191                 }
3192         }
3193
3194         if (rewrite_checksums)
3195                 rewrite_metadata_checksums(fs);
3196
3197         if (l_flag)
3198                 list_super(sb);
3199         if (stride_set) {
3200                 sb->s_raid_stride = stride;
3201                 ext2fs_mark_super_dirty(fs);
3202                 printf(_("Setting stride size to %d\n"), stride);
3203         }
3204         if (stripe_width_set) {
3205                 sb->s_raid_stripe_width = stripe_width;
3206                 ext2fs_mark_super_dirty(fs);
3207                 printf(_("Setting stripe width to %d\n"), stripe_width);
3208         }
3209         if (ext_mount_opts) {
3210                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3211                         sizeof(fs->super->s_mount_opts));
3212                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3213                 ext2fs_mark_super_dirty(fs);
3214                 printf(_("Setting extended default mount options to '%s'\n"),
3215                        ext_mount_opts);
3216                 free(ext_mount_opts);
3217         }
3218
3219 #ifdef NO_RECOVERY
3220         /* Warn if file system needs recovery and it is opened for writing. */
3221         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3222             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3223             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3224                 fprintf(stderr,
3225 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3226   "\te2fsck -E journal_only %s\n\n"
3227   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3228   "by journal recovery.\n"), device_name);
3229         }
3230 #else
3231         /* Recover the journal if possible. */
3232         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3233             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3234                 errcode_t err;
3235
3236                 printf(_("Recovering journal.\n"));
3237                 err = ext2fs_run_ext3_journal(&fs);
3238                 if (err) {
3239                         com_err("tune2fs", err, "while recovering journal.\n");
3240                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3241                         goto closefs;
3242                 }
3243                 ext2fs_clear_feature_journal_needs_recovery(fs->super);
3244                 ext2fs_mark_super_dirty(fs);
3245         }
3246 #endif
3247
3248         free(device_name);
3249         remove_error_table(&et_ext2_error_table);
3250
3251 closefs:
3252         if (rc) {
3253                 ext2fs_mmp_stop(fs);
3254 #ifndef BUILD_AS_LIB
3255                 exit(1);
3256 #endif
3257         }
3258
3259         convert_64bit(fs, feature_64bit);
3260         return (ext2fs_close_free(&fs) ? 1 : 0);
3261 }