misc/tune2fs.c

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