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 *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 120 static const char *please_dir_fsck =
 121                 N_("Please run e2fsck -fD on the filesystem.\n");
 122
 123 #ifdef CONFIG_BUILD_FINDFS
 124 void do_findfs(int argc, char **argv);
 125 #endif
 126
 127 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 128 int journal_enable_debug = -1;
 129 #endif
 130
 131 static void usage(void)
 132 {
 133         fprintf(stderr,
 134                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 135                   "[-g group]\n"
 136                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 137                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 138                   "\t[-p mmp_update_interval] [-r reserved_blocks_count] "
 139                   "[-u user]\n"
 140                   "\t[-C mount_count] [-L volume_label] [-M last_mounted_dir]\n"
 141                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 142                   "\t[-E extended-option[,...]] [-T last_check_time] "
 143                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 144                 program_name);
 145         exit(1);
 146 }
 147
 148 static __u32 ok_features[3] = {
 149         /* Compat */
 150         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 151                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 152         /* Incompat */
 153         EXT2_FEATURE_INCOMPAT_FILETYPE |
 154                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 155                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 156                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 157                 EXT4_FEATURE_INCOMPAT_MMP |
 158                 EXT4_FEATURE_INCOMPAT_64BIT |
 159                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 160                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 161                 EXT4_FEATURE_INCOMPAT_LARGEDIR,
 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                 printf("\n%s\n", _(please_fsck));
 425                 if (mount_flags & EXT2_MF_READONLY)
 426                         printf("%s", _("(and reboot afterwards!)\n"));
 427                 exit(1);
 428         }
 429
 430         /* Give the admin a few seconds to bail out of a dangerous op. */
 431         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 432                 return;
 433
 434         puts(prompt);
 435         proceed_question(5);
 436 }
 437
 438 static void request_dir_fsck_afterwards(ext2_filsys fs)
 439 {
 440         static int requested;
 441
 442         if (requested++)
 443                 return;
 444         fsck_requested++;
 445         fs->super->s_state &= ~EXT2_VALID_FS;
 446         printf("\n%s\n", _(please_dir_fsck));
 447         if (mount_flags & EXT2_MF_READONLY)
 448                 printf("%s", _("(and reboot afterwards!)\n"));
 449 }
 450
 451 static void request_fsck_afterwards(ext2_filsys fs)
 452 {
 453         static int requested = 0;
 454
 455         if (requested++)
 456                 return;
 457         fsck_requested++;
 458         fs->super->s_state &= ~EXT2_VALID_FS;
 459         printf("\n%s\n", _(please_fsck));
 460         if (mount_flags & EXT2_MF_READONLY)
 461                 printf("%s", _("(and reboot afterwards!)\n"));
 462 }
 463
 464 static void convert_64bit(ext2_filsys fs, int direction)
 465 {
 466         if (!direction)
 467                 return;
 468
 469         /*
 470          * Is resize2fs going to demand a fsck run? Might as well tell the
 471          * user now.
 472          */
 473         if (!fsck_requested &&
 474             ((fs->super->s_state & EXT2_ERROR_FS) ||
 475              !(fs->super->s_state & EXT2_VALID_FS) ||
 476              fs->super->s_lastcheck < fs->super->s_mtime))
 477                 request_fsck_afterwards(fs);
 478         if (fsck_requested)
 479                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 480                         direction > 0 ? "-b" : "-s", fs->device_name);
 481         else
 482                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 483                         direction > 0 ? "-b" : "-s", fs->device_name);
 484
 485         if (undo_file)
 486                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 487         if (direction > 0)
 488                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 489         else
 490                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 491 }
 492
 493 /* Rewrite extents */
 494 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 495                                  struct ext2_inode *inode)
 496 {
 497         ext2_extent_handle_t    handle;
 498         struct ext2fs_extent    extent;
 499         errcode_t               errcode;
 500         struct ext2_extent_info info;
 501
 502         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 503             !ext2fs_has_feature_metadata_csum(fs->super))
 504                 return 0;
 505
 506         errcode = ext2fs_extent_open(fs, ino, &handle);
 507         if (errcode)
 508                 return errcode;
 509
 510         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 511         if (errcode)
 512                 goto out;
 513
 514         do {
 515                 errcode = ext2fs_extent_get_info(handle, &info);
 516                 if (errcode)
 517                         break;
 518
 519                 /*
 520                  * If this is the first extent in an extent block that we
 521                  * haven't visited, rewrite the extent to force the ETB
 522                  * checksum to be rewritten.
 523                  */
 524                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 525                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 526                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 527                         if (errcode)
 528                                 break;
 529                 }
 530
 531                 /* Skip to the end of a block of leaf nodes */
 532                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 533                         errcode = ext2fs_extent_get(handle,
 534                                                     EXT2_EXTENT_LAST_SIB,
 535                                                     &extent);
 536                         if (errcode)
 537                                 break;
 538                 }
 539
 540                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 541         } while (errcode == 0);
 542
 543 out:
 544         /* Ok if we run off the end */
 545         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 546                 errcode = 0;
 547         ext2fs_extent_free(handle);
 548         return errcode;
 549 }
 550
 551 /*
 552  * Rewrite directory blocks with checksums
 553  */
 554 struct rewrite_dir_context {
 555         char *buf;
 556         errcode_t errcode;
 557         ext2_ino_t dir;
 558         int is_htree;
 559 };
 560
 561 static int rewrite_dir_block(ext2_filsys fs,
 562                              blk64_t    *blocknr,
 563                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 564                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 565                              int        ref_offset EXT2FS_ATTR((unused)),
 566                              void       *priv_data)
 567 {
 568         struct ext2_dx_countlimit *dcl = NULL;
 569         struct rewrite_dir_context *ctx = priv_data;
 570         int dcl_offset, changed = 0;
 571
 572         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 573                                               ctx->dir);
 574         if (ctx->errcode)
 575                 return BLOCK_ABORT;
 576
 577         /* if htree node... */
 578         if (ctx->is_htree)
 579                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 580                                          &dcl, &dcl_offset);
 581         if (dcl) {
 582                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 583                         /* Ensure limit is the max size */
 584                         int max_entries = (fs->blocksize - dcl_offset) /
 585                                           sizeof(struct ext2_dx_entry);
 586                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 587                                 changed = 1;
 588                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 589                         }
 590                 } else {
 591                         /* If htree block is full then rebuild the dir */
 592                         if (ext2fs_le16_to_cpu(dcl->count) ==
 593                             ext2fs_le16_to_cpu(dcl->limit)) {
 594                                 request_dir_fsck_afterwards(fs);
 595                                 return 0;
 596                         }
 597                         /*
 598                          * Ensure dcl->limit is small enough to leave room for
 599                          * the checksum tail.
 600                          */
 601                         int max_entries = (fs->blocksize - (dcl_offset +
 602                                                 sizeof(struct ext2_dx_tail))) /
 603                                           sizeof(struct ext2_dx_entry);
 604                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 605                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 606                         /* Always rewrite checksum */
 607                         changed = 1;
 608                 }
 609         } else {
 610                 unsigned int rec_len, name_size;
 611                 char *top = ctx->buf + fs->blocksize;
 612                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 613                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 614
 615                 /* Find last and penultimate dirent */
 616                 while ((char *)de < top) {
 617                         penultimate_de = last_de;
 618                         last_de = de;
 619                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 620                         if (!ctx->errcode && !rec_len)
 621                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 622                         if (ctx->errcode)
 623                                 return BLOCK_ABORT;
 624                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 625                 }
 626                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 627                 if (ctx->errcode)
 628                         return BLOCK_ABORT;
 629                 name_size = ext2fs_dirent_name_len(last_de);
 630
 631                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 632                         if (!penultimate_de)
 633                                 return 0;
 634                         if (last_de->inode ||
 635                             name_size ||
 636                             rec_len != sizeof(struct ext2_dir_entry_tail))
 637                                 return 0;
 638                         /*
 639                          * The last dirent is unused and the right length to
 640                          * have stored a checksum.  Erase it.
 641                          */
 642                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 643                                                           &rec_len);
 644                         if (!rec_len)
 645                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 646                         if (ctx->errcode)
 647                                 return BLOCK_ABORT;
 648                         ext2fs_set_rec_len(fs, rec_len +
 649                                         sizeof(struct ext2_dir_entry_tail),
 650                                         penultimate_de);
 651                         changed = 1;
 652                 } else {
 653                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 654                         struct ext2_dir_entry_tail *t;
 655
 656                         /*
 657                          * If the last dirent looks like the tail, just update
 658                          * the checksum.
 659                          */
 660                         if (!last_de->inode &&
 661                             rec_len == csum_size) {
 662                                 t = (struct ext2_dir_entry_tail *)last_de;
 663                                 t->det_reserved_name_len =
 664                                                 EXT2_DIR_NAME_LEN_CSUM;
 665                                 changed = 1;
 666                                 goto out;
 667                         }
 668                         if (name_size & 3)
 669                                 name_size = (name_size & ~3) + 4;
 670                         /* If there's not enough space for the tail, e2fsck */
 671                         if (rec_len <= (8 + name_size + csum_size)) {
 672                                 request_dir_fsck_afterwards(fs);
 673                                 return 0;
 674                         }
 675                         /* Shorten that last de and insert the tail */
 676                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 677                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 678                         ext2fs_initialize_dirent_tail(fs, t);
 679
 680                         /* Always update checksum */
 681                         changed = 1;
 682                 }
 683         }
 684
 685 out:
 686         if (!changed)
 687                 return 0;
 688
 689         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 690                                                0, ctx->dir);
 691         if (ctx->errcode)
 692                 return BLOCK_ABORT;
 693
 694         return 0;
 695 }
 696
 697 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 698                                    struct ext2_inode *inode)
 699 {
 700         errcode_t       retval;
 701         struct rewrite_dir_context ctx;
 702
 703         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 704         if (retval)
 705                 return retval;
 706
 707         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 708         ctx.dir = dir;
 709         ctx.errcode = 0;
 710         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 711                                                 BLOCK_FLAG_DATA_ONLY,
 712                                        0, rewrite_dir_block, &ctx);
 713
 714         ext2fs_free_mem(&ctx.buf);
 715         if (retval)
 716                 return retval;
 717
 718         return ctx.errcode;
 719 }
 720
 721 /*
 722  * Forcibly set checksums in all inodes.
 723  */
 724 static void rewrite_inodes(ext2_filsys fs)
 725 {
 726         int length = EXT2_INODE_SIZE(fs->super);
 727         struct ext2_inode *inode, *zero;
 728         char            *ea_buf;
 729         ext2_inode_scan scan;
 730         errcode_t       retval;
 731         ext2_ino_t      ino;
 732         blk64_t         file_acl_block;
 733         int             inode_dirty;
 734
 735         if (fs->super->s_creator_os == EXT2_OS_HURD)
 736                 return;
 737
 738         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 739         if (retval) {
 740                 com_err("set_csum", retval, "while opening inode scan");
 741                 exit(1);
 742         }
 743
 744         retval = ext2fs_get_mem(length, &inode);
 745         if (retval) {
 746                 com_err("set_csum", retval, "while allocating memory");
 747                 exit(1);
 748         }
 749
 750         retval = ext2fs_get_memzero(length, &zero);
 751         if (retval) {
 752                 com_err("set_csum", retval, "while allocating memory");
 753                 exit(1);
 754         }
 755
 756         retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
 757         if (retval) {
 758                 com_err("set_csum", retval, "while allocating memory");
 759                 exit(1);
 760         }
 761
 762         do {
 763                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 764                 if (retval) {
 765                         com_err("set_csum", retval, "while getting next inode");
 766                         exit(1);
 767                 }
 768                 if (!ino)
 769                         break;
 770                 if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 771                         inode_dirty = 1;
 772                 } else {
 773                         if (memcmp(inode, zero, length) != 0) {
 774                                 memset(inode, 0, length);
 775                                 inode_dirty = 1;
 776                         } else {
 777                                 inode_dirty = 0;
 778                         }
 779                 }
 780
 781                 if (inode_dirty) {
 782                         retval = ext2fs_write_inode_full(fs, ino, inode,
 783                                                          length);
 784                         if (retval) {
 785                                 com_err("set_csum", retval, "while writing "
 786                                         "inode");
 787                                 exit(1);
 788                         }
 789                 }
 790
 791                 retval = rewrite_extents(fs, ino, inode);
 792                 if (retval) {
 793                         com_err("rewrite_extents", retval,
 794                                 "while rewriting extents");
 795                         exit(1);
 796                 }
 797
 798                 if (LINUX_S_ISDIR(inode->i_mode) &&
 799                     ext2fs_inode_has_valid_blocks2(fs, inode)) {
 800                         retval = rewrite_directory(fs, ino, inode);
 801                         if (retval) {
 802                                 com_err("rewrite_directory", retval,
 803                                         "while rewriting directories");
 804                                 exit(1);
 805                         }
 806                 }
 807
 808                 file_acl_block = ext2fs_file_acl_block(fs, inode);
 809                 if (!file_acl_block)
 810                         continue;
 811                 retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
 812                 if (retval) {
 813                         com_err("rewrite_eablock", retval,
 814                                 "while rewriting extended attribute");
 815                         exit(1);
 816                 }
 817                 retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
 818                                                 ino);
 819                 if (retval) {
 820                         com_err("rewrite_eablock", retval,
 821                                 "while rewriting extended attribute");
 822                         exit(1);
 823                 }
 824         } while (ino);
 825
 826         ext2fs_free_mem(&zero);
 827         ext2fs_free_mem(&inode);
 828         ext2fs_free_mem(&ea_buf);
 829         ext2fs_close_inode_scan(scan);
 830 }
 831
 832 static void rewrite_metadata_checksums(ext2_filsys fs)
 833 {
 834         errcode_t retval;
 835         dgrp_t i;
 836
 837         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 838         ext2fs_init_csum_seed(fs);
 839         for (i = 0; i < fs->group_desc_count; i++)
 840                 ext2fs_group_desc_csum_set(fs, i);
 841         retval = ext2fs_read_bitmaps(fs);
 842         if (retval) {
 843                 com_err("rewrite_metadata_checksums", retval,
 844                         "while reading bitmaps");
 845                 exit(1);
 846         }
 847         rewrite_inodes(fs);
 848         ext2fs_mark_ib_dirty(fs);
 849         ext2fs_mark_bb_dirty(fs);
 850         ext2fs_mmp_update2(fs, 1);
 851         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 852         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 853         if (ext2fs_has_feature_metadata_csum(fs->super))
 854                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 855         else
 856                 fs->super->s_checksum_type = 0;
 857         ext2fs_mark_super_dirty(fs);
 858 }
 859
 860 static void enable_uninit_bg(ext2_filsys fs)
 861 {
 862         struct ext2_group_desc *gd;
 863         dgrp_t i;
 864
 865         for (i = 0; i < fs->group_desc_count; i++) {
 866                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 867                 gd->bg_itable_unused = 0;
 868                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 869                 ext2fs_group_desc_csum_set(fs, i);
 870         }
 871         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 872 }
 873
 874 static errcode_t zero_empty_inodes(ext2_filsys fs)
 875 {
 876         int length = EXT2_INODE_SIZE(fs->super);
 877         struct ext2_inode *inode = NULL;
 878         ext2_inode_scan scan;
 879         errcode_t       retval;
 880         ext2_ino_t      ino;
 881
 882         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 883         if (retval)
 884                 goto out;
 885
 886         retval = ext2fs_get_mem(length, &inode);
 887         if (retval)
 888                 goto out;
 889
 890         do {
 891                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 892                 if (retval)
 893                         goto out;
 894                 if (!ino)
 895                         break;
 896                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 897                         memset(inode, 0, length);
 898                         retval = ext2fs_write_inode_full(fs, ino, inode,
 899                                                          length);
 900                         if (retval)
 901                                 goto out;
 902                 }
 903         } while (1);
 904
 905 out:
 906         ext2fs_free_mem(&inode);
 907         ext2fs_close_inode_scan(scan);
 908         return retval;
 909 }
 910
 911 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 912 {
 913         struct ext2_group_desc *gd;
 914         dgrp_t i;
 915         errcode_t retval;
 916         blk64_t b, c, d;
 917
 918         /* Load bitmaps to ensure that the uninit ones get written out */
 919         fs->super->s_feature_ro_compat |= csum_feature_flag;
 920         retval = ext2fs_read_bitmaps(fs);
 921         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 922         if (retval) {
 923                 com_err("disable_uninit_bg", retval,
 924                         "while reading bitmaps");
 925                 request_fsck_afterwards(fs);
 926                 return retval;
 927         }
 928         ext2fs_mark_ib_dirty(fs);
 929         ext2fs_mark_bb_dirty(fs);
 930
 931         /* If we're only turning off uninit_bg, zero the inodes */
 932         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 933                 retval = zero_empty_inodes(fs);
 934                 if (retval) {
 935                         com_err("disable_uninit_bg", retval,
 936                                 "while zeroing unused inodes");
 937                         request_fsck_afterwards(fs);
 938                         return retval;
 939                 }
 940         }
 941
 942         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
 943         for (i = 0; i < fs->group_desc_count; i++) {
 944                 b = ext2fs_block_bitmap_loc(fs, i);
 945                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 946                 b = ext2fs_inode_bitmap_loc(fs, i);
 947                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 948
 949                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
 950                 if (retval == 0 && b)
 951                         ext2fs_mark_block_bitmap2(fs->block_map, b);
 952                 if (retval == 0 && c)
 953                         ext2fs_mark_block_bitmap2(fs->block_map, c);
 954                 if (retval == 0 && d)
 955                         ext2fs_mark_block_bitmap2(fs->block_map, d);
 956                 if (retval) {
 957                         com_err("disable_uninit_bg", retval,
 958                                 "while initializing block bitmaps");
 959                         request_fsck_afterwards(fs);
 960                 }
 961
 962                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 963                 gd->bg_itable_unused = 0;
 964                 gd->bg_flags = 0;
 965                 ext2fs_group_desc_csum_set(fs, i);
 966         }
 967         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 968         ext2fs_mark_super_dirty(fs);
 969
 970         return 0;
 971 }
 972
 973 static void
 974 try_confirm_csum_seed_support(void)
 975 {
 976         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
 977                 fputs(_("WARNING: Could not confirm kernel support for "
 978                         "metadata_csum_seed.\n  This requires Linux >= "
 979                         "v4.4.\n"), stderr);
 980 }
 981
 982 /*
 983  * Update the feature set as provided by the user.
 984  */
 985 static int update_feature_set(ext2_filsys fs, char *features)
 986 {
 987         struct ext2_super_block *sb = fs->super;
 988         __u32           old_features[3];
 989         int             type_err;
 990         unsigned int    mask_err;
 991         errcode_t       err;
 992         enum quota_type qtype;
 993
 994 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
 995                                 ((&sb->s_feature_compat)[(type)] & (mask)))
 996 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
 997                                  !((&sb->s_feature_compat)[(type)] & (mask)))
 998 #define FEATURE_CHANGED(type, mask) ((mask) & \
 999                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1000
1001         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1002         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1003         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1004
1005         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1006                               ok_features, clear_ok_features,
1007                               &type_err, &mask_err)) {
1008                 if (!mask_err)
1009                         fprintf(stderr,
1010                                 _("Invalid filesystem option set: %s\n"),
1011                                 features);
1012                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1013                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1014                                           "not supported.\n"),
1015                                 e2p_feature2string(type_err &
1016                                                    E2P_FEATURE_TYPE_MASK,
1017                                                    mask_err));
1018                 else
1019                         fprintf(stderr, _("Setting filesystem feature '%s' "
1020                                           "not supported.\n"),
1021                                 e2p_feature2string(type_err, mask_err));
1022                 return 1;
1023         }
1024
1025         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1026                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1027                     !(mount_flags & EXT2_MF_READONLY)) {
1028                         fputs(_("The has_journal feature may only be "
1029                                 "cleared when the filesystem is\n"
1030                                 "unmounted or mounted "
1031                                 "read-only.\n"), stderr);
1032                         return 1;
1033                 }
1034                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1035                     f_flag < 2) {
1036                         fputs(_("The needs_recovery flag is set.  "
1037                                 "Please run e2fsck before clearing\n"
1038                                 "the has_journal flag.\n"), stderr);
1039                         return 1;
1040                 }
1041                 if (sb->s_journal_inum) {
1042                         if (remove_journal_inode(fs))
1043                                 return 1;
1044                 }
1045                 if (sb->s_journal_dev) {
1046                         if (remove_journal_device(fs))
1047                                 return 1;
1048                 }
1049         }
1050
1051         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1052                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1053                 if (ext2fs_has_feature_meta_bg(sb)) {
1054                         fputs(_("Setting filesystem feature 'sparse_super' "
1055                                 "not supported\nfor filesystems with "
1056                                 "the meta_bg feature enabled.\n"),
1057                                 stderr);
1058                         return 1;
1059                 }
1060         }
1061
1062         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1063                 int error;
1064
1065                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1066                     (mount_flags & EXT2_MF_READONLY)) {
1067                         fputs(_("The multiple mount protection feature can't\n"
1068                                 "be set if the filesystem is mounted or\n"
1069                                 "read-only.\n"), stderr);
1070                         return 1;
1071                 }
1072
1073                 error = ext2fs_mmp_init(fs);
1074                 if (error) {
1075                         fputs(_("\nError while enabling multiple mount "
1076                                 "protection feature."), stderr);
1077                         return 1;
1078                 }
1079
1080                 /*
1081                  * We want to update group desc with the new free blocks count
1082                  */
1083                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1084
1085                 printf(_("Multiple mount protection has been enabled "
1086                          "with update interval %ds.\n"),
1087                        sb->s_mmp_update_interval);
1088         }
1089
1090         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1091                 int error;
1092
1093                 if (mount_flags & EXT2_MF_READONLY) {
1094                         fputs(_("The multiple mount protection feature cannot\n"
1095                                 "be disabled if the filesystem is readonly.\n"),
1096                                 stderr);
1097                         return 1;
1098                 }
1099
1100                 error = ext2fs_read_bitmaps(fs);
1101                 if (error) {
1102                         fputs(_("Error while reading bitmaps\n"), stderr);
1103                         return 1;
1104                 }
1105
1106                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1107                 if (error) {
1108                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1109
1110                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1111                                 printf(_("Magic number in MMP block does not "
1112                                          "match. expected: %x, actual: %x\n"),
1113                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1114                         else
1115                                 com_err(program_name, error, "%s",
1116                                         _("while reading MMP block."));
1117                         goto mmp_error;
1118                 }
1119
1120                 /* We need to force out the group descriptors as well */
1121                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1122                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1123 mmp_error:
1124                 sb->s_mmp_block = 0;
1125                 sb->s_mmp_update_interval = 0;
1126         }
1127
1128         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1129                 /*
1130                  * If adding a journal flag, let the create journal
1131                  * code below handle setting the flag and creating the
1132                  * journal.  We supply a default size if necessary.
1133                  */
1134                 if (!journal_size)
1135                         journal_size = -1;
1136                 ext2fs_clear_feature_journal(sb);
1137         }
1138
1139         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1140                 if (!sb->s_def_hash_version)
1141                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1142                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1143                         uuid_generate((unsigned char *) sb->s_hash_seed);
1144         }
1145
1146         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1147                 if (ext2fs_check_desc(fs)) {
1148                         fputs(_("Clearing the flex_bg flag would "
1149                                 "cause the the filesystem to be\n"
1150                                 "inconsistent.\n"), stderr);
1151                         return 1;
1152                 }
1153         }
1154
1155         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1156                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1157                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1158                     !(mount_flags & EXT2_MF_READONLY)) {
1159                         fputs(_("The huge_file feature may only be "
1160                                 "cleared when the filesystem is\n"
1161                                 "unmounted or mounted "
1162                                 "read-only.\n"), stderr);
1163                         return 1;
1164                 }
1165         }
1166
1167         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1168                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1169                 check_fsck_needed(fs,
1170                         _("Enabling checksums could take some time."));
1171                 if (mount_flags & EXT2_MF_MOUNTED) {
1172                         fputs(_("Cannot enable metadata_csum on a mounted "
1173                                 "filesystem!\n"), stderr);
1174                         exit(1);
1175                 }
1176                 if (!ext2fs_has_feature_extents(fs->super))
1177                         printf("%s",
1178                                _("Extents are not enabled.  The file extent "
1179                                  "tree can be checksummed, whereas block maps "
1180                                  "cannot.  Not enabling extents reduces the "
1181                                  "coverage of metadata checksumming.  "
1182                                  "Re-run with -O extent to rectify.\n"));
1183                 if (!ext2fs_has_feature_64bit(fs->super))
1184                         printf("%s",
1185                                _("64-bit filesystem support is not enabled.  "
1186                                  "The larger fields afforded by this feature "
1187                                  "enable full-strength checksumming.  "
1188                                  "Run resize2fs -b to rectify.\n"));
1189                 rewrite_checksums = 1;
1190                 /* metadata_csum supersedes uninit_bg */
1191                 ext2fs_clear_feature_gdt_csum(fs->super);
1192
1193                 /* if uninit_bg was previously off, rewrite group desc */
1194                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1195                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1196                         enable_uninit_bg(fs);
1197
1198                 /*
1199                  * Since metadata_csum supersedes uninit_bg, pretend like
1200                  * uninit_bg has been off all along.
1201                  */
1202                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1203                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1204         }
1205
1206         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1207                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1208                 __u32   test_features[3];
1209
1210                 check_fsck_needed(fs,
1211                         _("Disabling checksums could take some time."));
1212                 if (mount_flags & EXT2_MF_MOUNTED) {
1213                         fputs(_("Cannot disable metadata_csum on a mounted "
1214                                 "filesystem!\n"), stderr);
1215                         exit(1);
1216                 }
1217                 rewrite_checksums = 1;
1218
1219                 /* Enable uninit_bg unless the user expressly turned it off */
1220                 memcpy(test_features, old_features, sizeof(test_features));
1221                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1222                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1223                 e2p_edit_feature2(features, test_features, ok_features,
1224                                   clear_ok_features, NULL, NULL);
1225                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1226                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1227                         ext2fs_set_feature_gdt_csum(fs->super);
1228
1229                 /*
1230                  * If we're turning off metadata_csum and not turning on
1231                  * uninit_bg, rewrite group desc.
1232                  */
1233                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1234                         err = disable_uninit_bg(fs,
1235                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1236                         if (err)
1237                                 return 1;
1238                 } else
1239                         /*
1240                          * metadata_csum previously provided uninit_bg, so if
1241                          * we're also setting the uninit_bg feature bit,
1242                          * pretend like it was previously enabled.  Checksums
1243                          * will be rewritten with crc16 later.
1244                          */
1245                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1246                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1247                 fs->super->s_checksum_seed = 0;
1248                 ext2fs_clear_feature_csum_seed(fs->super);
1249         }
1250
1251         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1252                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1253                 /* Do not enable uninit_bg when metadata_csum enabled */
1254                 if (ext2fs_has_feature_metadata_csum(fs->super))
1255                         ext2fs_clear_feature_gdt_csum(fs->super);
1256                 else
1257                         enable_uninit_bg(fs);
1258         }
1259
1260         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1261                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1262                 err = disable_uninit_bg(fs,
1263                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1264                 if (err)
1265                         return 1;
1266         }
1267
1268         /*
1269          * We don't actually toggle 64bit; resize2fs does that.  But this
1270          * must come after the metadata_csum feature_on so that it won't
1271          * complain about the lack of 64bit.
1272          */
1273         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1274                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1275                 if (mount_flags & EXT2_MF_MOUNTED) {
1276                         fprintf(stderr, _("Cannot enable 64-bit mode "
1277                                           "while mounted!\n"));
1278                         exit(1);
1279                 }
1280                 ext2fs_clear_feature_64bit(sb);
1281                 feature_64bit = 1;
1282         }
1283         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1284                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1285                 if (mount_flags & EXT2_MF_MOUNTED) {
1286                         fprintf(stderr, _("Cannot disable 64-bit mode "
1287                                           "while mounted!\n"));
1288                         exit(1);
1289                 }
1290                 ext2fs_set_feature_64bit(sb);
1291                 feature_64bit = -1;
1292         }
1293
1294         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1295                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1296                 /*
1297                  * Set the Q_flag here and handle the quota options in the code
1298                  * below.
1299                  */
1300                 if (!Q_flag) {
1301                         Q_flag = 1;
1302                         /* Enable usr/grp quota by default */
1303                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1304                                 if (qtype != PRJQUOTA)
1305                                         quota_enable[qtype] = QOPT_ENABLE;
1306                                 else
1307                                         quota_enable[qtype] = QOPT_DISABLE;
1308                         }
1309                 }
1310                 ext2fs_clear_feature_quota(sb);
1311         }
1312
1313         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1314                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1315                 Q_flag = 1;
1316                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1317         }
1318
1319         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1320                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1321                 Q_flag = 1;
1322                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1323         }
1324
1325         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1326                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1327                 /*
1328                  * Set the Q_flag here and handle the quota options in the code
1329                  * below.
1330                  */
1331                 if (Q_flag)
1332                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1333                                 "arguments.\n"), stderr);
1334                 Q_flag = 1;
1335                 /* Disable all quota by default */
1336                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1337                         quota_enable[qtype] = QOPT_DISABLE;
1338         }
1339
1340         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1341                 fs->super->s_encrypt_algos[0] =
1342                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1343                 fs->super->s_encrypt_algos[1] =
1344                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1345         }
1346
1347         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1348                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1349                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1350                         fputs(_("Setting feature 'metadata_csum_seed' "
1351                                 "is only supported\non filesystems with "
1352                                 "the metadata_csum feature enabled.\n"),
1353                                 stderr);
1354                         return 1;
1355                 }
1356                 try_confirm_csum_seed_support();
1357                 fs->super->s_checksum_seed = fs->csum_seed;
1358         }
1359
1360         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1361                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1362                 __le32 uuid_seed;
1363
1364                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1365                                         sizeof(fs->super->s_uuid));
1366                 if (fs->super->s_checksum_seed != uuid_seed &&
1367                     (mount_flags & EXT2_MF_MOUNTED)) {
1368                         fputs(_("UUID has changed since enabling "
1369                                 "metadata_csum.  Filesystem must be unmounted "
1370                                 "\nto safely rewrite all metadata to "
1371                                 "match the new UUID.\n"), stderr);
1372                         return 1;
1373                 }
1374
1375                 rewrite_checksums = 1;
1376         }
1377
1378         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1379             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1380              sb->s_feature_incompat))
1381                 ext2fs_update_dynamic_rev(fs);
1382
1383         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1384                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1385             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1386                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1387             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1388                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1389             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1390                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1391             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1392                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1393                 request_fsck_afterwards(fs);
1394
1395         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1396             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1397             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1398                 ext2fs_mark_super_dirty(fs);
1399
1400         return 0;
1401 }
1402
1403 /*
1404  * Add a journal to the filesystem.
1405  */
1406 static int add_journal(ext2_filsys fs)
1407 {
1408         unsigned long journal_blocks;
1409         errcode_t       retval;
1410         ext2_filsys     jfs;
1411         io_manager      io_ptr;
1412
1413         if (ext2fs_has_feature_journal(fs->super)) {
1414                 fputs(_("The filesystem already has a journal.\n"), stderr);
1415                 goto err;
1416         }
1417         if (journal_device) {
1418                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1419                                         NULL))
1420                         proceed_question(-1);
1421                 check_mount(journal_device, 0, _("journal"));
1422 #ifdef CONFIG_TESTIO_DEBUG
1423                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1424                         io_ptr = test_io_manager;
1425                         test_io_backing_manager = unix_io_manager;
1426                 } else
1427 #endif
1428                         io_ptr = unix_io_manager;
1429                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1430                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1431                                      fs->blocksize, io_ptr, &jfs);
1432                 if (retval) {
1433                         com_err(program_name, retval,
1434                                 _("\n\twhile trying to open journal on %s\n"),
1435                                 journal_device);
1436                         goto err;
1437                 }
1438                 printf(_("Creating journal on device %s: "),
1439                        journal_device);
1440                 fflush(stdout);
1441
1442                 retval = ext2fs_add_journal_device(fs, jfs);
1443                 ext2fs_close_free(&jfs);
1444                 if (retval) {
1445                         com_err(program_name, retval,
1446                                 _("while adding filesystem to journal on %s"),
1447                                 journal_device);
1448                         goto err;
1449                 }
1450                 fputs(_("done\n"), stdout);
1451         } else if (journal_size) {
1452                 fputs(_("Creating journal inode: "), stdout);
1453                 fflush(stdout);
1454                 journal_blocks = figure_journal_size(journal_size, fs);
1455
1456                 if (journal_location_string)
1457                         journal_location =
1458                                 parse_num_blocks2(journal_location_string,
1459                                                   fs->super->s_log_block_size);
1460                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1461                                                    journal_location,
1462                                                    journal_flags);
1463                 if (retval) {
1464                         fprintf(stderr, "\n");
1465                         com_err(program_name, retval, "%s",
1466                                 _("\n\twhile trying to create journal file"));
1467                         return retval;
1468                 } else
1469                         fputs(_("done\n"), stdout);
1470                 /*
1471                  * If the filesystem wasn't mounted, we need to force
1472                  * the block group descriptors out.
1473                  */
1474                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1475                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1476         }
1477         print_check_message(fs->super->s_max_mnt_count,
1478                             fs->super->s_checkinterval);
1479         return 0;
1480
1481 err:
1482         free(journal_device);
1483         return 1;
1484 }
1485
1486 static void handle_quota_options(ext2_filsys fs)
1487 {
1488         errcode_t retval;
1489         quota_ctx_t qctx;
1490         ext2_ino_t qf_ino;
1491         enum quota_type qtype;
1492         unsigned int qtype_bits = 0;
1493         int need_dirty = 0;
1494
1495         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1496                 if (quota_enable[qtype] != 0)
1497                         break;
1498         if (qtype == MAXQUOTAS)
1499                 /* Nothing to do. */
1500                 return;
1501
1502         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1503                 if (quota_enable[qtype] == QOPT_ENABLE)
1504                         qtype_bits |= 1 << qtype;
1505         }
1506
1507         retval = quota_init_context(&qctx, fs, qtype_bits);
1508         if (retval) {
1509                 com_err(program_name, retval,
1510                         _("while initializing quota context in support library"));
1511                 exit(1);
1512         }
1513
1514         if (qtype_bits)
1515                 quota_compute_usage(qctx);
1516
1517         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1518                 if (quota_enable[qtype] == QOPT_ENABLE &&
1519                     *quota_sb_inump(fs->super, qtype) == 0) {
1520                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1521                                 retval = quota_update_limits(qctx, qf_ino,
1522                                                              qtype);
1523                                 if (retval) {
1524                                         com_err(program_name, retval,
1525                                                 _("while updating quota limits (%d)"),
1526                                                 qtype);
1527                                         exit(1);
1528                                 }
1529                         }
1530                         retval = quota_write_inode(qctx, 1 << qtype);
1531                         if (retval) {
1532                                 com_err(program_name, retval,
1533                                         _("while writing quota file (%d)"),
1534                                         qtype);
1535                                 exit(1);
1536                         }
1537                         /* Enable Quota feature if one of quota enabled */
1538                         if (!ext2fs_has_feature_quota(fs->super)) {
1539                                 ext2fs_set_feature_quota(fs->super);
1540                                 need_dirty = 1;
1541                         }
1542                         if (qtype == PRJQUOTA &&
1543                             !ext2fs_has_feature_project(fs->super)) {
1544                                 ext2fs_set_feature_project(fs->super);
1545                                 need_dirty = 1;
1546                         }
1547                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1548                         retval = quota_remove_inode(fs, qtype);
1549                         if (retval) {
1550                                 com_err(program_name, retval,
1551                                         _("while removing quota file (%d)"),
1552                                         qtype);
1553                                 exit(1);
1554                         }
1555                         if (qtype == PRJQUOTA) {
1556                                 ext2fs_clear_feature_project(fs->super);
1557                                 need_dirty = 1;
1558                         }
1559                 }
1560         }
1561
1562         quota_release_context(&qctx);
1563         /* Clear Quota feature if all quota types disabled. */
1564         if (!qtype_bits) {
1565                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1566                         if (*quota_sb_inump(fs->super, qtype))
1567                                 break;
1568                 if (qtype == MAXQUOTAS) {
1569                         ext2fs_clear_feature_quota(fs->super);
1570                         need_dirty = 1;
1571                 }
1572
1573         }
1574         if (need_dirty)
1575                 ext2fs_mark_super_dirty(fs);
1576         return;
1577 }
1578
1579 static int option_handle_function(char *token)
1580 {
1581         if (strncmp(token, "usr", 3) == 0) {
1582                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1583         } else if (strncmp(token, "^usr", 4) == 0) {
1584                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1585         } else if (strncmp(token, "grp", 3) == 0) {
1586                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1587         } else if (strncmp(token, "^grp", 4) == 0) {
1588                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1589         } else if (strncmp(token, "prj", 3) == 0) {
1590                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1591         } else if (strncmp(token, "^prj", 4) == 0) {
1592                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1593         } else {
1594                 fputs(_("\nBad quota options specified.\n\n"
1595                         "Following valid quota options are available "
1596                         "(pass by separating with comma):\n"
1597                         "\t[^]usr[quota]\n"
1598                         "\t[^]grp[quota]\n"
1599                         "\t[^]prj[quota]\n"
1600                         "\n\n"), stderr);
1601                 return 1;
1602         }
1603         return 0;
1604 }
1605
1606 static void parse_e2label_options(int argc, char ** argv)
1607 {
1608         if ((argc < 2) || (argc > 3)) {
1609                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1610                 exit(1);
1611         }
1612         io_options = strchr(argv[1], '?');
1613         if (io_options)
1614                 *io_options++ = 0;
1615         device_name = blkid_get_devname(NULL, argv[1], NULL);
1616         if (!device_name) {
1617                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1618                         argv[1]);
1619                 exit(1);
1620         }
1621         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1622         if (argc == 3) {
1623                 open_flag |= EXT2_FLAG_RW;
1624                 L_flag = 1;
1625                 new_label = argv[2];
1626         } else
1627                 print_label++;
1628 }
1629
1630 static time_t parse_time(char *str)
1631 {
1632         struct  tm      ts;
1633
1634         if (strcmp(str, "now") == 0) {
1635                 return (time(0));
1636         }
1637         memset(&ts, 0, sizeof(ts));
1638 #ifdef HAVE_STRPTIME
1639         strptime(str, "%Y%m%d%H%M%S", &ts);
1640 #else
1641         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1642                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1643         ts.tm_year -= 1900;
1644         ts.tm_mon -= 1;
1645         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1646             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1647             ts.tm_min > 59 || ts.tm_sec > 61)
1648                 ts.tm_mday = 0;
1649 #endif
1650         if (ts.tm_mday == 0) {
1651                 com_err(program_name, 0,
1652                         _("Couldn't parse date/time specifier: %s"),
1653                         str);
1654                 usage();
1655         }
1656         ts.tm_isdst = -1;
1657         return (mktime(&ts));
1658 }
1659
1660 static void parse_tune2fs_options(int argc, char **argv)
1661 {
1662         int c;
1663         char *tmp;
1664         struct group *gr;
1665         struct passwd *pw;
1666         int ret;
1667         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1668
1669         open_flag = 0;
1670         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1671         while ((c = getopt(argc, argv, optstring)) != EOF)
1672                 switch (c) {
1673                 case 'c':
1674                         max_mount_count = strtol(optarg, &tmp, 0);
1675                         if (*tmp || max_mount_count > 16000) {
1676                                 com_err(program_name, 0,
1677                                         _("bad mounts count - %s"),
1678                                         optarg);
1679                                 usage();
1680                         }
1681                         if (max_mount_count == 0)
1682                                 max_mount_count = -1;
1683                         c_flag = 1;
1684                         open_flag = EXT2_FLAG_RW;
1685                         break;
1686                 case 'C':
1687                         mount_count = strtoul(optarg, &tmp, 0);
1688                         if (*tmp || mount_count > 16000) {
1689                                 com_err(program_name, 0,
1690                                         _("bad mounts count - %s"),
1691                                         optarg);
1692                                 usage();
1693                         }
1694                         C_flag = 1;
1695                         open_flag = EXT2_FLAG_RW;
1696                         break;
1697                 case 'e':
1698                         if (strcmp(optarg, "continue") == 0)
1699                                 errors = EXT2_ERRORS_CONTINUE;
1700                         else if (strcmp(optarg, "remount-ro") == 0)
1701                                 errors = EXT2_ERRORS_RO;
1702                         else if (strcmp(optarg, "panic") == 0)
1703                                 errors = EXT2_ERRORS_PANIC;
1704                         else {
1705                                 com_err(program_name, 0,
1706                                         _("bad error behavior - %s"),
1707                                         optarg);
1708                                 usage();
1709                         }
1710                         e_flag = 1;
1711                         open_flag = EXT2_FLAG_RW;
1712                         break;
1713                 case 'E':
1714                         extended_cmd = optarg;
1715                         open_flag |= EXT2_FLAG_RW;
1716                         break;
1717                 case 'f': /* Force */
1718                         f_flag++;
1719                         break;
1720                 case 'g':
1721                         resgid = strtoul(optarg, &tmp, 0);
1722                         if (*tmp) {
1723                                 gr = getgrnam(optarg);
1724                                 if (gr == NULL)
1725                                         tmp = optarg;
1726                                 else {
1727                                         resgid = gr->gr_gid;
1728                                         *tmp = 0;
1729                                 }
1730                         }
1731                         if (*tmp) {
1732                                 com_err(program_name, 0,
1733                                         _("bad gid/group name - %s"),
1734                                         optarg);
1735                                 usage();
1736                         }
1737                         g_flag = 1;
1738                         open_flag = EXT2_FLAG_RW;
1739                         break;
1740                 case 'i':
1741                         interval = strtoul(optarg, &tmp, 0);
1742                         switch (*tmp) {
1743                         case 's':
1744                                 tmp++;
1745                                 break;
1746                         case '\0':
1747                         case 'd':
1748                         case 'D': /* days */
1749                                 interval *= 86400;
1750                                 if (*tmp != '\0')
1751                                         tmp++;
1752                                 break;
1753                         case 'm':
1754                         case 'M': /* months! */
1755                                 interval *= 86400 * 30;
1756                                 tmp++;
1757                                 break;
1758                         case 'w':
1759                         case 'W': /* weeks */
1760                                 interval *= 86400 * 7;
1761                                 tmp++;
1762                                 break;
1763                         }
1764                         if (*tmp) {
1765                                 com_err(program_name, 0,
1766                                         _("bad interval - %s"), optarg);
1767                                 usage();
1768                         }
1769                         i_flag = 1;
1770                         open_flag = EXT2_FLAG_RW;
1771                         break;
1772                 case 'j':
1773                         if (!journal_size)
1774                                 journal_size = -1;
1775                         open_flag = EXT2_FLAG_RW;
1776                         break;
1777                 case 'J':
1778                         parse_journal_opts(optarg);
1779                         open_flag = EXT2_FLAG_RW;
1780                         break;
1781                 case 'l':
1782                         l_flag = 1;
1783                         break;
1784                 case 'L':
1785                         new_label = optarg;
1786                         L_flag = 1;
1787                         open_flag |= EXT2_FLAG_RW |
1788                                 EXT2_FLAG_JOURNAL_DEV_OK;
1789                         break;
1790                 case 'm':
1791                         reserved_ratio = strtod(optarg, &tmp);
1792                         if (*tmp || reserved_ratio > 50 ||
1793                             reserved_ratio < 0) {
1794                                 com_err(program_name, 0,
1795                                         _("bad reserved block ratio - %s"),
1796                                         optarg);
1797                                 usage();
1798                         }
1799                         m_flag = 1;
1800                         open_flag = EXT2_FLAG_RW;
1801                         break;
1802                 case 'M':
1803                         new_last_mounted = optarg;
1804                         M_flag = 1;
1805                         open_flag = EXT2_FLAG_RW;
1806                         break;
1807                 case 'o':
1808                         if (mntopts_cmd) {
1809                                 com_err(program_name, 0, "%s",
1810                                         _("-o may only be specified once"));
1811                                 usage();
1812                         }
1813                         mntopts_cmd = optarg;
1814                         open_flag = EXT2_FLAG_RW;
1815                         break;
1816                 case 'O':
1817                         if (features_cmd) {
1818                                 com_err(program_name, 0, "%s",
1819                                         _("-O may only be specified once"));
1820                                 usage();
1821                         }
1822                         features_cmd = optarg;
1823                         open_flag = EXT2_FLAG_RW;
1824                         break;
1825                 case 'Q':
1826                         Q_flag = 1;
1827                         ret = parse_quota_opts(optarg, option_handle_function);
1828                         if (ret)
1829                                 exit(1);
1830                         open_flag = EXT2_FLAG_RW;
1831                         break;
1832                 case 'r':
1833                         reserved_blocks = strtoul(optarg, &tmp, 0);
1834                         if (*tmp) {
1835                                 com_err(program_name, 0,
1836                                         _("bad reserved blocks count - %s"),
1837                                         optarg);
1838                                 usage();
1839                         }
1840                         r_flag = 1;
1841                         open_flag = EXT2_FLAG_RW;
1842                         break;
1843                 case 's': /* Deprecated */
1844                         s_flag = atoi(optarg);
1845                         open_flag = EXT2_FLAG_RW;
1846                         break;
1847                 case 'T':
1848                         T_flag = 1;
1849                         last_check_time = parse_time(optarg);
1850                         open_flag = EXT2_FLAG_RW;
1851                         break;
1852                 case 'u':
1853                                 resuid = strtoul(optarg, &tmp, 0);
1854                                 if (*tmp) {
1855                                         pw = getpwnam(optarg);
1856                                         if (pw == NULL)
1857                                                 tmp = optarg;
1858                                         else {
1859                                                 resuid = pw->pw_uid;
1860                                                 *tmp = 0;
1861                                         }
1862                                 }
1863                                 if (*tmp) {
1864                                         com_err(program_name, 0,
1865                                                 _("bad uid/user name - %s"),
1866                                                 optarg);
1867                                         usage();
1868                                 }
1869                                 u_flag = 1;
1870                                 open_flag = EXT2_FLAG_RW;
1871                                 break;
1872                 case 'U':
1873                         new_UUID = optarg;
1874                         U_flag = 1;
1875                         open_flag = EXT2_FLAG_RW |
1876                                 EXT2_FLAG_JOURNAL_DEV_OK;
1877                         break;
1878                 case 'I':
1879                         new_inode_size = strtoul(optarg, &tmp, 0);
1880                         if (*tmp) {
1881                                 com_err(program_name, 0,
1882                                         _("bad inode size - %s"),
1883                                         optarg);
1884                                 usage();
1885                         }
1886                         if (!((new_inode_size &
1887                                (new_inode_size - 1)) == 0)) {
1888                                 com_err(program_name, 0,
1889                                         _("Inode size must be a "
1890                                           "power of two- %s"),
1891                                         optarg);
1892                                 usage();
1893                         }
1894                         open_flag = EXT2_FLAG_RW;
1895                         I_flag = 1;
1896                         break;
1897                 case 'z':
1898                         undo_file = optarg;
1899                         break;
1900                 default:
1901                         usage();
1902                 }
1903         if (optind < argc - 1 || optind == argc)
1904                 usage();
1905         if (!open_flag && !l_flag)
1906                 usage();
1907         io_options = strchr(argv[optind], '?');
1908         if (io_options)
1909                 *io_options++ = 0;
1910         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1911         if (!device_name) {
1912                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1913                         argv[optind]);
1914                 exit(1);
1915         }
1916 }
1917
1918 #ifdef CONFIG_BUILD_FINDFS
1919 void do_findfs(int argc, char **argv)
1920 {
1921         char    *dev;
1922
1923         if ((argc != 2) ||
1924             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1925                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1926                 exit(2);
1927         }
1928         dev = blkid_get_devname(NULL, argv[1], NULL);
1929         if (!dev) {
1930                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1931                         argv[1]);
1932                 exit(1);
1933         }
1934         puts(dev);
1935         exit(0);
1936 }
1937 #endif
1938
1939 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1940 {
1941         char    *buf, *token, *next, *p, *arg;
1942         int     len, hash_alg;
1943         int     r_usage = 0;
1944
1945         len = strlen(opts);
1946         buf = malloc(len+1);
1947         if (!buf) {
1948                 fprintf(stderr, "%s",
1949                         _("Couldn't allocate memory to parse options!\n"));
1950                 return 1;
1951         }
1952         strcpy(buf, opts);
1953         for (token = buf; token && *token; token = next) {
1954                 p = strchr(token, ',');
1955                 next = 0;
1956                 if (p) {
1957                         *p = 0;
1958                         next = p+1;
1959                 }
1960                 arg = strchr(token, '=');
1961                 if (arg) {
1962                         *arg = 0;
1963                         arg++;
1964                 }
1965                 if (strcmp(token, "clear-mmp") == 0 ||
1966                     strcmp(token, "clear_mmp") == 0) {
1967                         clear_mmp = 1;
1968                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1969                         unsigned long intv;
1970                         if (!arg) {
1971                                 r_usage++;
1972                                 continue;
1973                         }
1974                         intv = strtoul(arg, &p, 0);
1975                         if (*p) {
1976                                 fprintf(stderr,
1977                                         _("Invalid mmp_update_interval: %s\n"),
1978                                         arg);
1979                                 r_usage++;
1980                                 continue;
1981                         }
1982                         if (intv == 0) {
1983                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1984                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1985                                 fprintf(stderr,
1986                                         _("mmp_update_interval too big: %lu\n"),
1987                                         intv);
1988                                 r_usage++;
1989                                 continue;
1990                         }
1991                         printf(P_("Setting multiple mount protection update "
1992                                   "interval to %lu second\n",
1993                                   "Setting multiple mount protection update "
1994                                   "interval to %lu seconds\n", intv),
1995                                intv);
1996                         fs->super->s_mmp_update_interval = intv;
1997                         ext2fs_mark_super_dirty(fs);
1998                 } else if (!strcmp(token, "test_fs")) {
1999                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2000                         printf("Setting test filesystem flag\n");
2001                         ext2fs_mark_super_dirty(fs);
2002                 } else if (!strcmp(token, "^test_fs")) {
2003                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2004                         printf("Clearing test filesystem flag\n");
2005                         ext2fs_mark_super_dirty(fs);
2006                 } else if (strcmp(token, "stride") == 0) {
2007                         if (!arg) {
2008                                 r_usage++;
2009                                 continue;
2010                         }
2011                         stride = strtoul(arg, &p, 0);
2012                         if (*p) {
2013                                 fprintf(stderr,
2014                                         _("Invalid RAID stride: %s\n"),
2015                                         arg);
2016                                 r_usage++;
2017                                 continue;
2018                         }
2019                         stride_set = 1;
2020                 } else if (strcmp(token, "stripe-width") == 0 ||
2021                            strcmp(token, "stripe_width") == 0) {
2022                         if (!arg) {
2023                                 r_usage++;
2024                                 continue;
2025                         }
2026                         stripe_width = strtoul(arg, &p, 0);
2027                         if (*p) {
2028                                 fprintf(stderr,
2029                                         _("Invalid RAID stripe-width: %s\n"),
2030                                         arg);
2031                                 r_usage++;
2032                                 continue;
2033                         }
2034                         stripe_width_set = 1;
2035                 } else if (strcmp(token, "hash_alg") == 0 ||
2036                            strcmp(token, "hash-alg") == 0) {
2037                         if (!arg) {
2038                                 r_usage++;
2039                                 continue;
2040                         }
2041                         hash_alg = e2p_string2hash(arg);
2042                         if (hash_alg < 0) {
2043                                 fprintf(stderr,
2044                                         _("Invalid hash algorithm: %s\n"),
2045                                         arg);
2046                                 r_usage++;
2047                                 continue;
2048                         }
2049                         fs->super->s_def_hash_version = hash_alg;
2050                         printf(_("Setting default hash algorithm "
2051                                  "to %s (%d)\n"),
2052                                arg, hash_alg);
2053                         ext2fs_mark_super_dirty(fs);
2054                 } else if (!strcmp(token, "mount_opts")) {
2055                         if (!arg) {
2056                                 r_usage++;
2057                                 continue;
2058                         }
2059                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2060                                 fprintf(stderr,
2061                                         "Extended mount options too long\n");
2062                                 continue;
2063                         }
2064                         ext_mount_opts = strdup(arg);
2065                 } else
2066                         r_usage++;
2067         }
2068         if (r_usage) {
2069                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2070                         "Extended options are separated by commas, "
2071                         "and may take an argument which\n"
2072                         "\tis set off by an equals ('=') sign.\n\n"
2073                         "Valid extended options are:\n"
2074                         "\tclear_mmp\n"
2075                         "\thash_alg=<hash algorithm>\n"
2076                         "\tmount_opts=<extended default mount options>\n"
2077                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2078                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2079                         "\ttest_fs\n"
2080                         "\t^test_fs\n"));
2081                 free(buf);
2082                 return 1;
2083         }
2084         free(buf);
2085
2086         return 0;
2087 }
2088
2089 /*
2090  * Fill in the block bitmap bmap with the information regarding the
2091  * blocks to be moved
2092  */
2093 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2094                             ext2fs_block_bitmap bmap)
2095 {
2096         dgrp_t i;
2097         int retval;
2098         ext2_badblocks_list bb_list = 0;
2099         blk64_t j, needed_blocks = 0;
2100         blk64_t start_blk, end_blk;
2101
2102         retval = ext2fs_read_bb_inode(fs, &bb_list);
2103         if (retval)
2104                 return retval;
2105
2106         for (i = 0; i < fs->group_desc_count; i++) {
2107                 start_blk = ext2fs_inode_table_loc(fs, i) +
2108                                         fs->inode_blocks_per_group;
2109
2110                 end_blk = ext2fs_inode_table_loc(fs, i) +
2111                                         new_ino_blks_per_grp;
2112
2113                 for (j = start_blk; j < end_blk; j++) {
2114                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2115                                 /*
2116                                  * IF the block is a bad block we fail
2117                                  */
2118                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2119                                         ext2fs_badblocks_list_free(bb_list);
2120                                         return ENOSPC;
2121                                 }
2122
2123                                 ext2fs_mark_block_bitmap2(bmap, j);
2124                         } else {
2125                                 /*
2126                                  * We are going to use this block for
2127                                  * inode table. So mark them used.
2128                                  */
2129                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2130                         }
2131                 }
2132                 needed_blocks += end_blk - start_blk;
2133         }
2134
2135         ext2fs_badblocks_list_free(bb_list);
2136         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2137                 return ENOSPC;
2138
2139         return 0;
2140 }
2141
2142 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2143 {
2144         dgrp_t group;
2145         group = ext2fs_group_of_blk2(fs, blk);
2146         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2147                 return 1;
2148         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2149                 return 1;
2150         return 0;
2151 }
2152
2153 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2154 {
2155         blk64_t start_blk, end_blk;
2156         start_blk = fs->super->s_first_data_block +
2157                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2158         /*
2159          * We cannot get new block beyond end_blk for for the last block group
2160          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2161          */
2162         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2163         if (blk >= start_blk && blk <= end_blk)
2164                 return 1;
2165         return 0;
2166 }
2167
2168 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2169 {
2170
2171         char *buf;
2172         dgrp_t group = 0;
2173         errcode_t retval;
2174         int meta_data = 0;
2175         blk64_t blk, new_blk, goal;
2176         struct blk_move *bmv;
2177
2178         retval = ext2fs_get_mem(fs->blocksize, &buf);
2179         if (retval)
2180                 return retval;
2181
2182         for (new_blk = blk = fs->super->s_first_data_block;
2183              blk < ext2fs_blocks_count(fs->super); blk++) {
2184                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2185                         continue;
2186
2187                 if (ext2fs_is_meta_block(fs, blk)) {
2188                         /*
2189                          * If the block is mapping a fs meta data block
2190                          * like group desc/block bitmap/inode bitmap. We
2191                          * should find a block in the same group and fix
2192                          * the respective fs metadata pointers. Otherwise
2193                          * fail
2194                          */
2195                         group = ext2fs_group_of_blk2(fs, blk);
2196                         goal = ext2fs_group_first_block2(fs, group);
2197                         meta_data = 1;
2198
2199                 } else {
2200                         goal = new_blk;
2201                 }
2202                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2203                 if (retval)
2204                         goto err_out;
2205
2206                 /* new fs meta data block should be in the same group */
2207                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2208                         retval = ENOSPC;
2209                         goto err_out;
2210                 }
2211
2212                 /* Mark this block as allocated */
2213                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2214
2215                 /* Add it to block move list */
2216                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2217                 if (retval)
2218                         goto err_out;
2219
2220                 bmv->old_loc = blk;
2221                 bmv->new_loc = new_blk;
2222
2223                 list_add(&(bmv->list), &blk_move_list);
2224
2225                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2226                 if (retval)
2227                         goto err_out;
2228
2229                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2230                 if (retval)
2231                         goto err_out;
2232         }
2233
2234 err_out:
2235         ext2fs_free_mem(&buf);
2236         return retval;
2237 }
2238
2239 static blk64_t translate_block(blk64_t blk)
2240 {
2241         struct list_head *entry;
2242         struct blk_move *bmv;
2243
2244         list_for_each(entry, &blk_move_list) {
2245                 bmv = list_entry(entry, struct blk_move, list);
2246                 if (bmv->old_loc == blk)
2247                         return bmv->new_loc;
2248         }
2249
2250         return 0;
2251 }
2252
2253 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2254                          blk64_t *block_nr,
2255                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2256                          blk64_t ref_block EXT2FS_ATTR((unused)),
2257                          int ref_offset EXT2FS_ATTR((unused)),
2258                          void *priv_data)
2259 {
2260         int ret = 0;
2261         blk64_t new_blk;
2262         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2263
2264         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2265                 return 0;
2266         new_blk = translate_block(*block_nr);
2267         if (new_blk) {
2268                 *block_nr = new_blk;
2269                 /*
2270                  * This will force the ext2fs_write_inode in the iterator
2271                  */
2272                 ret |= BLOCK_CHANGED;
2273         }
2274
2275         return ret;
2276 }
2277
2278 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2279 {
2280         errcode_t retval = 0;
2281         ext2_ino_t ino;
2282         blk64_t blk;
2283         char *block_buf = 0;
2284         struct ext2_inode inode;
2285         ext2_inode_scan scan = NULL;
2286
2287         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2288         if (retval)
2289                 return retval;
2290
2291         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2292         if (retval)
2293                 goto err_out;
2294
2295         while (1) {
2296                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2297                 if (retval)
2298                         goto err_out;
2299
2300                 if (!ino)
2301                         break;
2302
2303                 if (inode.i_links_count == 0)
2304                         continue; /* inode not in use */
2305
2306                 /* FIXME!!
2307                  * If we end up modifying the journal inode
2308                  * the sb->s_jnl_blocks will differ. But a
2309                  * subsequent e2fsck fixes that.
2310                  * Do we need to fix this ??
2311                  */
2312
2313                 if (ext2fs_file_acl_block(fs, &inode) &&
2314                     ext2fs_test_block_bitmap2(bmap,
2315                                         ext2fs_file_acl_block(fs, &inode))) {
2316                         blk = translate_block(ext2fs_file_acl_block(fs,
2317                                                                     &inode));
2318                         if (!blk)
2319                                 continue;
2320
2321                         ext2fs_file_acl_block_set(fs, &inode, blk);
2322
2323                         /*
2324                          * Write the inode to disk so that inode table
2325                          * resizing can work
2326                          */
2327                         retval = ext2fs_write_inode(fs, ino, &inode);
2328                         if (retval)
2329                                 goto err_out;
2330                 }
2331
2332                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2333                         continue;
2334
2335                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2336                                                process_block, bmap);
2337                 if (retval)
2338                         goto err_out;
2339
2340         }
2341
2342 err_out:
2343         ext2fs_free_mem(&block_buf);
2344         ext2fs_close_inode_scan(scan);
2345
2346         return retval;
2347 }
2348
2349 /*
2350  * We need to scan for inode and block bitmaps that may need to be
2351  * moved.  This can take place if the filesystem was formatted for
2352  * RAID arrays using the mke2fs's extended option "stride".
2353  */
2354 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2355 {
2356         dgrp_t i;
2357         blk64_t blk, new_blk;
2358
2359         for (i = 0; i < fs->group_desc_count; i++) {
2360                 blk = ext2fs_block_bitmap_loc(fs, i);
2361                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2362                         new_blk = translate_block(blk);
2363                         if (!new_blk)
2364                                 continue;
2365                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2366                 }
2367
2368                 blk = ext2fs_inode_bitmap_loc(fs, i);
2369                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2370                         new_blk = translate_block(blk);
2371                         if (!new_blk)
2372                                 continue;
2373                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2374                 }
2375         }
2376         return 0;
2377 }
2378
2379 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2380 {
2381         dgrp_t i;
2382         blk64_t blk;
2383         errcode_t retval;
2384         int new_ino_blks_per_grp;
2385         unsigned int j;
2386         char *old_itable = NULL, *new_itable = NULL;
2387         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2388         unsigned long old_ino_size;
2389         int old_itable_size, new_itable_size;
2390
2391         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2392         old_ino_size = EXT2_INODE_SIZE(fs->super);
2393
2394         new_ino_blks_per_grp = ext2fs_div_ceil(
2395                                         EXT2_INODES_PER_GROUP(fs->super) *
2396                                         new_ino_size,
2397                                         fs->blocksize);
2398
2399         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2400
2401         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2402         if (retval)
2403                 return retval;
2404
2405         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2406         if (retval)
2407                 goto err_out;
2408
2409         tmp_old_itable = old_itable;
2410         tmp_new_itable = new_itable;
2411
2412         for (i = 0; i < fs->group_desc_count; i++) {
2413                 blk = ext2fs_inode_table_loc(fs, i);
2414                 retval = io_channel_read_blk64(fs->io, blk,
2415                                 fs->inode_blocks_per_group, old_itable);
2416                 if (retval)
2417                         goto err_out;
2418
2419                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2420                         memcpy(new_itable, old_itable, old_ino_size);
2421
2422                         memset(new_itable+old_ino_size, 0,
2423                                         new_ino_size - old_ino_size);
2424
2425                         new_itable += new_ino_size;
2426                         old_itable += old_ino_size;
2427                 }
2428
2429                 /* reset the pointer */
2430                 old_itable = tmp_old_itable;
2431                 new_itable = tmp_new_itable;
2432
2433                 retval = io_channel_write_blk64(fs->io, blk,
2434                                         new_ino_blks_per_grp, new_itable);
2435                 if (retval)
2436                         goto err_out;
2437         }
2438
2439         /* Update the meta data */
2440         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2441         ext2fs_free_inode_cache(fs->icache);
2442         fs->icache = 0;
2443         fs->super->s_inode_size = new_ino_size;
2444
2445 err_out:
2446         if (old_itable)
2447                 ext2fs_free_mem(&old_itable);
2448
2449         if (new_itable)
2450                 ext2fs_free_mem(&new_itable);
2451
2452         return retval;
2453 }
2454
2455 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2456 {
2457         blk64_t         blk;
2458         ext2_ino_t      ino;
2459         unsigned int    group = 0;
2460         unsigned int    count = 0;
2461         int             total_free = 0;
2462         int             group_free = 0;
2463
2464         /*
2465          * First calculate the block statistics
2466          */
2467         for (blk = fs->super->s_first_data_block;
2468              blk < ext2fs_blocks_count(fs->super); blk++) {
2469                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2470                         group_free++;
2471                         total_free++;
2472                 }
2473                 count++;
2474                 if ((count == fs->super->s_blocks_per_group) ||
2475                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2476                         ext2fs_bg_free_blocks_count_set(fs, group++,
2477                                                         group_free);
2478                         count = 0;
2479                         group_free = 0;
2480                 }
2481         }
2482         total_free = EXT2FS_C2B(fs, total_free);
2483         ext2fs_free_blocks_count_set(fs->super, total_free);
2484
2485         /*
2486          * Next, calculate the inode statistics
2487          */
2488         group_free = 0;
2489         total_free = 0;
2490         count = 0;
2491         group = 0;
2492
2493         /* Protect loop from wrap-around if s_inodes_count maxed */
2494         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2495                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2496                         group_free++;
2497                         total_free++;
2498                 }
2499                 count++;
2500                 if ((count == fs->super->s_inodes_per_group) ||
2501                     (ino == fs->super->s_inodes_count)) {
2502                         ext2fs_bg_free_inodes_count_set(fs, group++,
2503                                                         group_free);
2504                         count = 0;
2505                         group_free = 0;
2506                 }
2507         }
2508         fs->super->s_free_inodes_count = total_free;
2509         ext2fs_mark_super_dirty(fs);
2510         return 0;
2511 }
2512
2513 #define list_for_each_safe(pos, pnext, head) \
2514         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2515              pos = pnext, pnext = pos->next)
2516
2517 static void free_blk_move_list(void)
2518 {
2519         struct list_head *entry, *tmp;
2520         struct blk_move *bmv;
2521
2522         list_for_each_safe(entry, tmp, &blk_move_list) {
2523                 bmv = list_entry(entry, struct blk_move, list);
2524                 list_del(entry);
2525                 ext2fs_free_mem(&bmv);
2526         }
2527         return;
2528 }
2529
2530 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2531 {
2532         errcode_t retval;
2533         int new_ino_blks_per_grp;
2534         ext2fs_block_bitmap bmap;
2535
2536         retval = ext2fs_read_inode_bitmap(fs);
2537         if (retval) {
2538                 fputs(_("Failed to read inode bitmap\n"), stderr);
2539                 return retval;
2540         }
2541         retval = ext2fs_read_block_bitmap(fs);
2542         if (retval) {
2543                 fputs(_("Failed to read block bitmap\n"), stderr);
2544                 return retval;
2545         }
2546         INIT_LIST_HEAD(&blk_move_list);
2547
2548
2549         new_ino_blks_per_grp = ext2fs_div_ceil(
2550                                         EXT2_INODES_PER_GROUP(fs->super)*
2551                                         new_size,
2552                                         fs->blocksize);
2553
2554         /* We may change the file system.
2555          * Mark the file system as invalid so that
2556          * the user is prompted to run fsck.
2557          */
2558         fs->super->s_state &= ~EXT2_VALID_FS;
2559
2560         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2561                                                 &bmap);
2562         if (retval) {
2563                 fputs(_("Failed to allocate block bitmap when "
2564                                 "increasing inode size\n"), stderr);
2565                 return retval;
2566         }
2567         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2568         if (retval) {
2569                 fputs(_("Not enough space to increase inode size \n"), stderr);
2570                 goto err_out;
2571         }
2572         retval = move_block(fs, bmap);
2573         if (retval) {
2574                 fputs(_("Failed to relocate blocks during inode resize \n"),
2575                       stderr);
2576                 goto err_out;
2577         }
2578         retval = inode_scan_and_fix(fs, bmap);
2579         if (retval)
2580                 goto err_out_undo;
2581
2582         retval = group_desc_scan_and_fix(fs, bmap);
2583         if (retval)
2584                 goto err_out_undo;
2585
2586         retval = expand_inode_table(fs, new_size);
2587         if (retval)
2588                 goto err_out_undo;
2589
2590         ext2fs_calculate_summary_stats(fs);
2591
2592         fs->super->s_state |= EXT2_VALID_FS;
2593         /* mark super block and block bitmap as dirty */
2594         ext2fs_mark_super_dirty(fs);
2595         ext2fs_mark_bb_dirty(fs);
2596
2597 err_out:
2598         free_blk_move_list();
2599         ext2fs_free_block_bitmap(bmap);
2600
2601         return retval;
2602
2603 err_out_undo:
2604         free_blk_move_list();
2605         ext2fs_free_block_bitmap(bmap);
2606         fputs(_("Error in resizing the inode size.\n"
2607                         "Run e2undo to undo the "
2608                         "file system changes. \n"), stderr);
2609
2610         return retval;
2611 }
2612
2613 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2614 {
2615         errcode_t retval = 0;
2616         const char *tdb_dir;
2617         char *tdb_file = NULL;
2618         char *dev_name, *tmp_name;
2619
2620         /* (re)open a specific undo file */
2621         if (undo_file && undo_file[0] != 0) {
2622                 retval = set_undo_io_backing_manager(*io_ptr);
2623                 if (retval)
2624                         goto err;
2625                 *io_ptr = undo_io_manager;
2626                 retval = set_undo_io_backup_file(undo_file);
2627                 if (retval)
2628                         goto err;
2629                 printf(_("Overwriting existing filesystem; this can be undone "
2630                          "using the command:\n"
2631                          "    e2undo %s %s\n\n"),
2632                          undo_file, name);
2633                 return retval;
2634         }
2635
2636         /*
2637          * Configuration via a conf file would be
2638          * nice
2639          */
2640         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2641         if (!tdb_dir)
2642                 tdb_dir = "/var/lib/e2fsprogs";
2643
2644         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2645             access(tdb_dir, W_OK))
2646                 return 0;
2647
2648         tmp_name = strdup(name);
2649         if (!tmp_name)
2650                 goto errout;
2651         dev_name = basename(tmp_name);
2652         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2653         if (!tdb_file) {
2654                 free(tmp_name);
2655                 goto errout;
2656         }
2657         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2658         free(tmp_name);
2659
2660         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2661                 retval = errno;
2662                 com_err(program_name, retval,
2663                         _("while trying to delete %s"), tdb_file);
2664                 goto errout;
2665         }
2666
2667         retval = set_undo_io_backing_manager(*io_ptr);
2668         if (retval)
2669                 goto errout;
2670         *io_ptr = undo_io_manager;
2671         retval = set_undo_io_backup_file(tdb_file);
2672         if (retval)
2673                 goto errout;
2674         printf(_("Overwriting existing filesystem; this can be undone "
2675                  "using the command:\n"
2676                  "    e2undo %s %s\n\n"),
2677                  tdb_file, name);
2678
2679         free(tdb_file);
2680         return 0;
2681 errout:
2682         free(tdb_file);
2683 err:
2684         com_err("tune2fs", retval, "while trying to setup undo file\n");
2685         return retval;
2686 }
2687
2688 static int
2689 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2690 {
2691         int retval, nr_users, start;
2692         journal_superblock_t *jsb;
2693         ext2_filsys jfs;
2694         __u8 *j_uuid;
2695         char *journal_path;
2696         char uuid[UUID_STR_SIZE];
2697         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2698
2699         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2700                 return 0;
2701
2702         uuid_unparse(sb->s_journal_uuid, uuid);
2703         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2704         if (!journal_path)
2705                 return 0;
2706
2707         retval = ext2fs_open2(journal_path, io_options,
2708                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2709                               0, 0, unix_io_manager, &jfs);
2710         if (retval) {
2711                 com_err(program_name, retval,
2712                         _("while trying to open %s"),
2713                         journal_path);
2714                 return retval;
2715         }
2716
2717         retval = get_journal_sb(jfs, buf);
2718         if (retval != 0) {
2719                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2720                         fprintf(stderr, _("%s is not a journal device.\n"),
2721                                 journal_path);
2722                 return retval;
2723         }
2724
2725         jsb = (journal_superblock_t *) buf;
2726         /* Find the filesystem UUID */
2727         nr_users = ntohl(jsb->s_nr_users);
2728
2729         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2730         if (j_uuid == NULL) {
2731                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2732                       stderr);
2733                 return EXT2_ET_LOAD_EXT_JOURNAL;
2734         }
2735
2736         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2737
2738         start = ext2fs_journal_sb_start(jfs->blocksize);
2739         /* Write back the journal superblock */
2740         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2741         if (retval != 0) {
2742                 com_err(program_name, retval,
2743                         "while writing journal superblock.");
2744                 return retval;
2745         }
2746
2747         ext2fs_close(jfs);
2748
2749         return 0;
2750 }
2751
2752 #ifndef BUILD_AS_LIB
2753 int main(int argc, char **argv)
2754 #else
2755 int tune2fs_main(int argc, char **argv)
2756 #endif  /* BUILD_AS_LIB */
2757 {
2758         errcode_t retval;
2759         ext2_filsys fs;
2760         struct ext2_super_block *sb;
2761         io_manager io_ptr, io_ptr_orig = NULL;
2762         int rc = 0;
2763         char default_undo_file[1] = { 0 };
2764
2765 #ifdef ENABLE_NLS
2766         setlocale(LC_MESSAGES, "");
2767         setlocale(LC_CTYPE, "");
2768         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2769         textdomain(NLS_CAT_NAME);
2770         set_com_err_gettext(gettext);
2771 #endif
2772         if (argc && *argv)
2773                 program_name = *argv;
2774         add_error_table(&et_ext2_error_table);
2775
2776 #ifdef CONFIG_BUILD_FINDFS
2777         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2778                 do_findfs(argc, argv);
2779 #endif
2780         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2781                 parse_e2label_options(argc, argv);
2782         else
2783                 parse_tune2fs_options(argc, argv);
2784
2785 #ifdef CONFIG_TESTIO_DEBUG
2786         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2787                 io_ptr = test_io_manager;
2788                 test_io_backing_manager = unix_io_manager;
2789         } else
2790 #endif
2791                 io_ptr = unix_io_manager;
2792
2793 retry_open:
2794         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2795                 open_flag |= EXT2_FLAG_SKIP_MMP;
2796
2797         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2798
2799         /* keep the filesystem struct around to dump MMP data */
2800         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2801
2802         retval = ext2fs_open2(device_name, io_options, open_flag,
2803                               0, 0, io_ptr, &fs);
2804         if (retval) {
2805                 com_err(program_name, retval,
2806                         _("while trying to open %s"),
2807                         device_name);
2808                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2809                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2810                         dump_mmp_msg(fs->mmp_buf,
2811                                      _("If you are sure the filesystem "
2812                                        "is not in use on any node, run:\n"
2813                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2814                 else if (retval == EXT2_ET_MMP_FAILED)
2815                         dump_mmp_msg(fs->mmp_buf, NULL);
2816                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2817                         fprintf(stderr,
2818                                 _("MMP block magic is bad. Try to fix it by "
2819                                   "running:\n'e2fsck -f %s'\n"), device_name);
2820                 else if (retval == EXT2_ET_BAD_MAGIC)
2821                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2822                 else if (retval != EXT2_ET_MMP_FAILED)
2823                         fprintf(stderr, "%s",
2824                              _("Couldn't find valid filesystem superblock.\n"));
2825
2826                 ext2fs_free(fs);
2827                 exit(1);
2828         }
2829         if (ext2fs_has_feature_journal_dev(fs->super)) {
2830                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2831                 ext2fs_free(fs);
2832                 exit(1);
2833         }
2834         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2835
2836         if (I_flag) {
2837                 /*
2838                  * Check the inode size is right so we can issue an
2839                  * error message and bail before setting up the tdb
2840                  * file.
2841                  */
2842                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2843                         fprintf(stderr, _("The inode size is already %lu\n"),
2844                                 new_inode_size);
2845                         rc = 1;
2846                         goto closefs;
2847                 }
2848                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2849                         fprintf(stderr, "%s",
2850                                 _("Shrinking inode size is not supported\n"));
2851                         rc = 1;
2852                         goto closefs;
2853                 }
2854                 if (new_inode_size > fs->blocksize) {
2855                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2856                                 new_inode_size, fs->blocksize);
2857                         rc = 1;
2858                         goto closefs;
2859                 }
2860                 check_fsck_needed(fs,
2861                         _("Resizing inodes could take some time."));
2862                 /*
2863                  * If inode resize is requested use the
2864                  * Undo I/O manager
2865                  */
2866                 undo_file = default_undo_file;
2867         }
2868
2869         /* Set up an undo file */
2870         if (undo_file && io_ptr_orig == NULL) {
2871                 io_ptr_orig = io_ptr;
2872                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2873                 if (retval) {
2874                         rc = 1;
2875                         goto closefs;
2876                 }
2877                 if (io_ptr != io_ptr_orig) {
2878                         ext2fs_close_free(&fs);
2879                         goto retry_open;
2880                 }
2881         }
2882
2883         sb = fs->super;
2884         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2885
2886         if (print_label) {
2887                 /* For e2label emulation */
2888                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2889                        sb->s_volume_name);
2890                 remove_error_table(&et_ext2_error_table);
2891                 goto closefs;
2892         }
2893
2894         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2895         if (retval) {
2896                 com_err("ext2fs_check_if_mount", retval,
2897                         _("while determining whether %s is mounted."),
2898                         device_name);
2899                 rc = 1;
2900                 goto closefs;
2901         }
2902         /* Normally we only need to write out the superblock */
2903         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2904
2905         if (c_flag) {
2906                 sb->s_max_mnt_count = max_mount_count;
2907                 ext2fs_mark_super_dirty(fs);
2908                 printf(_("Setting maximal mount count to %d\n"),
2909                        max_mount_count);
2910         }
2911         if (C_flag) {
2912                 sb->s_mnt_count = mount_count;
2913                 ext2fs_mark_super_dirty(fs);
2914                 printf(_("Setting current mount count to %d\n"), mount_count);
2915         }
2916         if (e_flag) {
2917                 sb->s_errors = errors;
2918                 ext2fs_mark_super_dirty(fs);
2919                 printf(_("Setting error behavior to %d\n"), errors);
2920         }
2921         if (g_flag) {
2922                 sb->s_def_resgid = resgid;
2923                 ext2fs_mark_super_dirty(fs);
2924                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2925         }
2926         if (i_flag) {
2927                 if ((unsigned long long)interval >= (1ULL << 32)) {
2928                         com_err(program_name, 0,
2929                                 _("interval between checks is too big (%lu)"),
2930                                 interval);
2931                         rc = 1;
2932                         goto closefs;
2933                 }
2934                 sb->s_checkinterval = interval;
2935                 ext2fs_mark_super_dirty(fs);
2936                 printf(_("Setting interval between checks to %lu seconds\n"),
2937                        interval);
2938         }
2939         if (m_flag) {
2940                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2941                                           ext2fs_blocks_count(sb) / 100.0);
2942                 ext2fs_mark_super_dirty(fs);
2943                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2944                         reserved_ratio, ext2fs_r_blocks_count(sb));
2945         }
2946         if (r_flag) {
2947                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2948                         com_err(program_name, 0,
2949                                 _("reserved blocks count is too big (%llu)"),
2950                                 reserved_blocks);
2951                         rc = 1;
2952                         goto closefs;
2953                 }
2954                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2955                 ext2fs_mark_super_dirty(fs);
2956                 printf(_("Setting reserved blocks count to %llu\n"),
2957                        reserved_blocks);
2958         }
2959         if (s_flag == 1) {
2960                 if (ext2fs_has_feature_sparse_super(sb)) {
2961                         fputs(_("\nThe filesystem already has sparse "
2962                                 "superblocks.\n"), stderr);
2963                 } else if (ext2fs_has_feature_meta_bg(sb)) {
2964                         fputs(_("\nSetting the sparse superblock flag not "
2965                                 "supported\nfor filesystems with "
2966                                 "the meta_bg feature enabled.\n"),
2967                                 stderr);
2968                         rc = 1;
2969                         goto closefs;
2970                 } else {
2971                         ext2fs_set_feature_sparse_super(sb);
2972                         sb->s_state &= ~EXT2_VALID_FS;
2973                         ext2fs_mark_super_dirty(fs);
2974                         printf(_("\nSparse superblock flag set.  %s"),
2975                                _(please_fsck));
2976                 }
2977         }
2978         if (s_flag == 0) {
2979                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2980                       stderr);
2981                 rc = 1;
2982                 goto closefs;
2983         }
2984         if (T_flag) {
2985                 sb->s_lastcheck = last_check_time;
2986                 ext2fs_mark_super_dirty(fs);
2987                 printf(_("Setting time filesystem last checked to %s\n"),
2988                        ctime(&last_check_time));
2989         }
2990         if (u_flag) {
2991                 sb->s_def_resuid = resuid;
2992                 ext2fs_mark_super_dirty(fs);
2993                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
2994         }
2995         if (L_flag) {
2996                 if (strlen(new_label) > sizeof(sb->s_volume_name))
2997                         fputs(_("Warning: label too long, truncating.\n"),
2998                               stderr);
2999                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3000                 strncpy(sb->s_volume_name, new_label,
3001                         sizeof(sb->s_volume_name));
3002                 ext2fs_mark_super_dirty(fs);
3003         }
3004         if (M_flag) {
3005                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3006                 strncpy(sb->s_last_mounted, new_last_mounted,
3007                         sizeof(sb->s_last_mounted));
3008                 ext2fs_mark_super_dirty(fs);
3009         }
3010         if (mntopts_cmd) {
3011                 rc = update_mntopts(fs, mntopts_cmd);
3012                 if (rc)
3013                         goto closefs;
3014         }
3015         if (features_cmd) {
3016                 rc = update_feature_set(fs, features_cmd);
3017                 if (rc)
3018                         goto closefs;
3019         }
3020         if (extended_cmd) {
3021                 rc = parse_extended_opts(fs, extended_cmd);
3022                 if (rc)
3023                         goto closefs;
3024                 if (clear_mmp && !f_flag) {
3025                         fputs(_("Error in using clear_mmp. "
3026                                 "It must be used with -f\n"),
3027                               stderr);
3028                         goto closefs;
3029                 }
3030         }
3031         if (clear_mmp) {
3032                 rc = ext2fs_mmp_clear(fs);
3033                 goto closefs;
3034         }
3035         if (journal_size || journal_device) {
3036                 rc = add_journal(fs);
3037                 if (rc)
3038                         goto closefs;
3039         }
3040
3041         if (Q_flag) {
3042                 if (mount_flags & EXT2_MF_MOUNTED) {
3043                         fputs(_("The quota feature may only be changed when "
3044                                 "the filesystem is unmounted.\n"), stderr);
3045                         rc = 1;
3046                         goto closefs;
3047                 }
3048                 handle_quota_options(fs);
3049         }
3050
3051         if (U_flag) {
3052                 int set_csum = 0;
3053                 dgrp_t i;
3054                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3055                 __u8 old_uuid[UUID_SIZE];
3056
3057                 if (ext2fs_has_group_desc_csum(fs)) {
3058                         /*
3059                          * Changing the UUID on a metadata_csum FS requires
3060                          * rewriting all metadata, which can race with a
3061                          * mounted fs.  Don't allow that unless we're saving
3062                          * the checksum seed.
3063                          */
3064                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3065                             !ext2fs_has_feature_csum_seed(fs->super) &&
3066                             ext2fs_has_feature_metadata_csum(fs->super)) {
3067                                 fputs(_("The UUID may only be "
3068                                         "changed when the filesystem is "
3069                                         "unmounted.\n"), stderr);
3070                                 fputs(_("If you only use kernels newer than "
3071                                         "v4.4, run 'tune2fs -O "
3072                                         "metadata_csum_seed' and re-run this "
3073                                         "command.\n"), stderr);
3074                                 try_confirm_csum_seed_support();
3075                                 exit(1);
3076                         }
3077                         if (!ext2fs_has_feature_csum_seed(fs->super))
3078                                 check_fsck_needed(fs,
3079                                         _("Setting UUID on a checksummed "
3080                                           "filesystem could take some time."));
3081
3082                         /*
3083                          * Determine if the block group checksums are
3084                          * correct so we know whether or not to set
3085                          * them later on.
3086                          */
3087                         for (i = 0; i < fs->group_desc_count; i++)
3088                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3089                                         break;
3090                         if (i >= fs->group_desc_count)
3091                                 set_csum = 1;
3092                 }
3093
3094                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3095                 if ((strcasecmp(new_UUID, "null") == 0) ||
3096                     (strcasecmp(new_UUID, "clear") == 0)) {
3097                         uuid_clear(sb->s_uuid);
3098                 } else if (strcasecmp(new_UUID, "time") == 0) {
3099                         uuid_generate_time(sb->s_uuid);
3100                 } else if (strcasecmp(new_UUID, "random") == 0) {
3101                         uuid_generate(sb->s_uuid);
3102                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3103                         com_err(program_name, 0, "%s",
3104                                 _("Invalid UUID format\n"));
3105                         rc = 1;
3106                         goto closefs;
3107                 }
3108                 ext2fs_init_csum_seed(fs);
3109                 if (set_csum) {
3110                         for (i = 0; i < fs->group_desc_count; i++)
3111                                 ext2fs_group_desc_csum_set(fs, i);
3112                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3113                 }
3114
3115                 /* If this is a journal dev, we need to copy UUID into jsb */
3116                 if (!(rc = get_journal_sb(fs, buf))) {
3117                         journal_superblock_t *jsb;
3118
3119                         jsb = (journal_superblock_t *) buf;
3120                         fputs(_("Need to update journal superblock.\n"), stdout);
3121                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3122
3123                         /* Writeback the journal superblock */
3124                         if ((rc = io_channel_write_blk64(fs->io,
3125                                 ext2fs_journal_sb_start(fs->blocksize),
3126                                         -SUPERBLOCK_SIZE, buf)))
3127                                 goto closefs;
3128                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3129                         goto closefs;
3130                 else {
3131                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3132
3133                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3134                                 goto closefs;
3135                 }
3136
3137                 ext2fs_mark_super_dirty(fs);
3138                 if (ext2fs_has_feature_metadata_csum(fs->super) &&
3139                     !ext2fs_has_feature_csum_seed(fs->super))
3140                         rewrite_checksums = 1;
3141         }
3142
3143         if (I_flag) {
3144                 if (mount_flags & EXT2_MF_MOUNTED) {
3145                         fputs(_("The inode size may only be "
3146                                 "changed when the filesystem is "
3147                                 "unmounted.\n"), stderr);
3148                         rc = 1;
3149                         goto closefs;
3150                 }
3151                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3152                         fputs(_("Changing the inode size not supported for "
3153                                 "filesystems with the flex_bg\n"
3154                                 "feature enabled.\n"),
3155                               stderr);
3156                         rc = 1;
3157                         goto closefs;
3158                 }
3159                 /*
3160                  * We want to update group descriptor also
3161                  * with the new free inode count
3162                  */
3163                 if (rewrite_checksums)
3164                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3165                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3166                 retval = resize_inode(fs, new_inode_size);
3167                 if (rewrite_checksums)
3168                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3169                 if (retval == 0) {
3170                         printf(_("Setting inode size %lu\n"),
3171                                                         new_inode_size);
3172                         rewrite_checksums = 1;
3173                 } else {
3174                         printf("%s", _("Failed to change inode size\n"));
3175                         rc = 1;
3176                         goto closefs;
3177                 }
3178         }
3179
3180         if (rewrite_checksums)
3181                 rewrite_metadata_checksums(fs);
3182
3183         if (l_flag)
3184                 list_super(sb);
3185         if (stride_set) {
3186                 sb->s_raid_stride = stride;
3187                 ext2fs_mark_super_dirty(fs);
3188                 printf(_("Setting stride size to %d\n"), stride);
3189         }
3190         if (stripe_width_set) {
3191                 sb->s_raid_stripe_width = stripe_width;
3192                 ext2fs_mark_super_dirty(fs);
3193                 printf(_("Setting stripe width to %d\n"), stripe_width);
3194         }
3195         if (ext_mount_opts) {
3196                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3197                         sizeof(fs->super->s_mount_opts));
3198                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3199                 ext2fs_mark_super_dirty(fs);
3200                 printf(_("Setting extended default mount options to '%s'\n"),
3201                        ext_mount_opts);
3202                 free(ext_mount_opts);
3203         }
3204
3205 #ifdef NO_RECOVERY
3206         /* Warn if file system needs recovery and it is opened for writing. */
3207         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3208             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3209             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3210                 fprintf(stderr,
3211 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3212   "\te2fsck -E journal_only %s\n\n"
3213   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3214   "by journal recovery.\n"), device_name);
3215         }
3216 #else
3217         /* Recover the journal if possible. */
3218         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3219             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3220                 errcode_t err;
3221
3222                 printf(_("Recovering journal.\n"));
3223                 err = ext2fs_run_ext3_journal(&fs);
3224                 if (err) {
3225                         com_err("tune2fs", err, "while recovering journal.\n");
3226                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3227                         goto closefs;
3228                 }
3229                 ext2fs_clear_feature_journal_needs_recovery(fs->super);
3230                 ext2fs_mark_super_dirty(fs);
3231         }
3232 #endif
3233
3234         free(device_name);
3235         remove_error_table(&et_ext2_error_table);
3236
3237 closefs:
3238         if (rc) {
3239                 ext2fs_mmp_stop(fs);
3240 #ifndef BUILD_AS_LIB
3241                 exit(1);
3242 #endif
3243         }
3244
3245         convert_64bit(fs, feature_64bit);
3246         return (ext2fs_close_free(&fs) ? 1 : 0);
3247 }