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