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 int enabling_casefold;
 105
 106 int journal_size, journal_fc_size, journal_flags;
 107 char *journal_device;
 108 static blk64_t journal_location = ~0LL;
 109
 110 static struct list_head blk_move_list;
 111
 112 struct blk_move {
 113         struct list_head list;
 114         blk64_t old_loc;
 115         blk64_t new_loc;
 116 };
 117
 118 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 119
 120 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 121
 122 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 123 static const char *please_dir_fsck =
 124                 N_("Please run e2fsck -fD on the filesystem.\n");
 125
 126 #ifdef CONFIG_BUILD_FINDFS
 127 void do_findfs(int argc, char **argv);
 128 #endif
 129
 130 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 131 int journal_enable_debug = -1;
 132 #endif
 133
 134 static void usage(void)
 135 {
 136         fprintf(stderr,
 137                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 138                   "[-g group]\n"
 139                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 140                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 141                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 142                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 143                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 144                   "\t[-E extended-option[,...]] [-T last_check_time] "
 145                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 146                 program_name);
 147         exit(1);
 148 }
 149
 150 static __u32 ok_features[3] = {
 151         /* Compat */
 152         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 153                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 154                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 155                 EXT4_FEATURE_COMPAT_STABLE_INODES,
 156         /* Incompat */
 157         EXT2_FEATURE_INCOMPAT_FILETYPE |
 158                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 159                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 160                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 161                 EXT4_FEATURE_INCOMPAT_MMP |
 162                 EXT4_FEATURE_INCOMPAT_64BIT |
 163                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 164                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 165                 EXT4_FEATURE_INCOMPAT_LARGEDIR |
 166                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 167         /* R/O compat */
 168         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 169                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 170                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 171                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 172                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 173                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 174                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 175                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 176                 EXT4_FEATURE_RO_COMPAT_READONLY |
 177                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 178                 EXT4_FEATURE_RO_COMPAT_VERITY
 179 };
 180
 181 static __u32 clear_ok_features[3] = {
 182         /* Compat */
 183         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 184                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 185                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 186                 EXT4_FEATURE_COMPAT_FAST_COMMIT,
 187         /* Incompat */
 188         EXT2_FEATURE_INCOMPAT_FILETYPE |
 189                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 190                 EXT4_FEATURE_INCOMPAT_MMP |
 191                 EXT4_FEATURE_INCOMPAT_64BIT |
 192                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 193         /* R/O compat */
 194         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 195                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 196                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 197                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 198                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 199                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 200                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 201                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 202                 EXT4_FEATURE_RO_COMPAT_READONLY
 203 };
 204
 205 /**
 206  * Try to get journal super block if any
 207  */
 208 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 209 {
 210         int retval;
 211         journal_superblock_t *jsb;
 212
 213         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 214                 return EXT2_ET_UNSUPP_FEATURE;
 215         }
 216
 217         /* Get the journal superblock */
 218         if ((retval = io_channel_read_blk64(jfs->io,
 219             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 220                 com_err(program_name, retval, "%s",
 221                 _("while reading journal superblock"));
 222                 return retval;
 223         }
 224
 225         jsb = (journal_superblock_t *) buf;
 226         if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
 227             (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
 228                 fputs(_("Journal superblock not found!\n"), stderr);
 229                 return EXT2_ET_BAD_MAGIC;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
 236                           int nr_users)
 237 {
 238         int i;
 239         for (i = 0; i < nr_users; i++) {
 240                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 241                         return &s_users[i * UUID_SIZE];
 242         }
 243
 244         return NULL;
 245 }
 246
 247 /*
 248  * Remove an external journal from the filesystem
 249  */
 250 static int remove_journal_device(ext2_filsys fs)
 251 {
 252         char            *journal_path;
 253         ext2_filsys     jfs;
 254         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 255         journal_superblock_t    *jsb;
 256         int             i, nr_users;
 257         errcode_t       retval;
 258         int             commit_remove_journal = 0;
 259         io_manager      io_ptr;
 260
 261         if (f_flag)
 262                 commit_remove_journal = 1; /* force removal even if error */
 263
 264         uuid_unparse(fs->super->s_journal_uuid, buf);
 265         journal_path = blkid_get_devname(NULL, "UUID", buf);
 266
 267         if (!journal_path) {
 268                 journal_path =
 269                         ext2fs_find_block_device(fs->super->s_journal_dev);
 270                 if (!journal_path)
 271                         goto no_valid_journal;
 272         }
 273
 274 #ifdef CONFIG_TESTIO_DEBUG
 275         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 276                 io_ptr = test_io_manager;
 277                 test_io_backing_manager = unix_io_manager;
 278         } else
 279 #endif
 280                 io_ptr = unix_io_manager;
 281         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 282                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 283                              fs->blocksize, io_ptr, &jfs);
 284         if (retval) {
 285                 com_err(program_name, retval, "%s",
 286                         _("while trying to open external journal"));
 287                 goto no_valid_journal;
 288         }
 289
 290         if ((retval = get_journal_sb(jfs, buf))) {
 291                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 292                         fprintf(stderr, _("%s is not a journal device.\n"),
 293                                 journal_path);
 294                 goto no_valid_journal;
 295         }
 296
 297         jsb = (journal_superblock_t *) buf;
 298         /* Find the filesystem UUID */
 299         nr_users = ntohl(jsb->s_nr_users);
 300         if (nr_users > JBD2_USERS_MAX) {
 301                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 302                                  "is too high (%d).\n"), nr_users);
 303                 commit_remove_journal = 1;
 304                 goto no_valid_journal;
 305         }
 306
 307         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 308                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 309                       stderr);
 310                 commit_remove_journal = 1;
 311                 goto no_valid_journal;
 312         }
 313         nr_users--;
 314         for (i = 0; i < nr_users; i++)
 315                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 316         jsb->s_nr_users = htonl(nr_users);
 317
 318         /* Write back the journal superblock */
 319         retval = io_channel_write_blk64(jfs->io,
 320                                         ext2fs_journal_sb_start(fs->blocksize),
 321                                         -SUPERBLOCK_SIZE, buf);
 322         if (retval) {
 323                 com_err(program_name, retval,
 324                         "while writing journal superblock.");
 325                 goto no_valid_journal;
 326         }
 327
 328         commit_remove_journal = 1;
 329
 330 no_valid_journal:
 331         if (commit_remove_journal == 0) {
 332                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 333                         "Use -f option to remove missing journal device.\n"),
 334                       stderr);
 335                 return 1;
 336         }
 337         fs->super->s_journal_dev = 0;
 338         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 339         uuid_clear(fs->super->s_journal_uuid);
 340         ext2fs_mark_super_dirty(fs);
 341         fputs(_("Journal removed\n"), stdout);
 342         free(journal_path);
 343
 344         return 0;
 345 }
 346
 347 /* Helper function for remove_journal_inode */
 348 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 349                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 350                                blk64_t ref_block EXT2FS_ATTR((unused)),
 351                                int ref_offset EXT2FS_ATTR((unused)),
 352                                void *private EXT2FS_ATTR((unused)))
 353 {
 354         blk64_t block;
 355         int     group;
 356
 357         block = *blocknr;
 358         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 359         group = ext2fs_group_of_blk2(fs, block);
 360         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 361         ext2fs_group_desc_csum_set(fs, group);
 362         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 363         return 0;
 364 }
 365
 366 /*
 367  * Remove the journal inode from the filesystem
 368  */
 369 static errcode_t remove_journal_inode(ext2_filsys fs)
 370 {
 371         struct ext2_inode       inode;
 372         errcode_t               retval;
 373         ext2_ino_t              ino = fs->super->s_journal_inum;
 374
 375         retval = ext2fs_read_inode(fs, ino,  &inode);
 376         if (retval) {
 377                 com_err(program_name, retval, "%s",
 378                         _("while reading journal inode"));
 379                 return retval;
 380         }
 381         if (ino == EXT2_JOURNAL_INO) {
 382                 retval = ext2fs_read_bitmaps(fs);
 383                 if (retval) {
 384                         com_err(program_name, retval, "%s",
 385                                 _("while reading bitmaps"));
 386                         return retval;
 387                 }
 388                 retval = ext2fs_block_iterate3(fs, ino,
 389                                                BLOCK_FLAG_READ_ONLY, NULL,
 390                                                release_blocks_proc, NULL);
 391                 if (retval) {
 392                         com_err(program_name, retval, "%s",
 393                                 _("while clearing journal inode"));
 394                         return retval;
 395                 }
 396                 fs->super->s_overhead_clusters -=
 397                         EXT2FS_NUM_B2C(fs, EXT2_I_SIZE(&inode) / fs->blocksize);
 398                 memset(&inode, 0, sizeof(inode));
 399                 ext2fs_mark_bb_dirty(fs);
 400                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 401         } else
 402                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 403         retval = ext2fs_write_inode(fs, ino, &inode);
 404         if (retval) {
 405                 com_err(program_name, retval, "%s",
 406                         _("while writing journal inode"));
 407                 return retval;
 408         }
 409         fs->super->s_journal_inum = 0;
 410         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 411         ext2fs_mark_super_dirty(fs);
 412
 413         return 0;
 414 }
 415
 416 /*
 417  * Update the default mount options
 418  */
 419 static int update_mntopts(ext2_filsys fs, char *mntopts)
 420 {
 421         struct ext2_super_block *sb = fs->super;
 422
 423         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 424                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 425                         mntopts);
 426                 return 1;
 427         }
 428         ext2fs_mark_super_dirty(fs);
 429
 430         return 0;
 431 }
 432
 433 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 434 {
 435         /* Refuse to modify anything but a freshly checked valid filesystem. */
 436         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 437             (fs->super->s_state & EXT2_ERROR_FS) ||
 438             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 439                 puts(_(fsck_explain));
 440                 puts(_(please_fsck));
 441                 if (mount_flags & EXT2_MF_READONLY)
 442                         printf("%s", _("(and reboot afterwards!)\n"));
 443                 return 1;
 444         }
 445
 446         /* Give the admin a few seconds to bail out of a dangerous op. */
 447         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 448                 return 0;
 449
 450         puts(prompt);
 451         proceed_question(5);
 452
 453         return 0;
 454 }
 455
 456 static void request_dir_fsck_afterwards(ext2_filsys fs)
 457 {
 458         static int requested;
 459
 460         if (requested++)
 461                 return;
 462         fsck_requested++;
 463         fs->super->s_state &= ~EXT2_VALID_FS;
 464         puts(_(fsck_explain));
 465         puts(_(please_dir_fsck));
 466         if (mount_flags & EXT2_MF_READONLY)
 467                 printf("%s", _("(and reboot afterwards!)\n"));
 468 }
 469
 470 static void request_fsck_afterwards(ext2_filsys fs)
 471 {
 472         static int requested = 0;
 473
 474         if (requested++)
 475                 return;
 476         fsck_requested++;
 477         fs->super->s_state &= ~EXT2_VALID_FS;
 478         printf("\n%s\n", _(please_fsck));
 479         if (mount_flags & EXT2_MF_READONLY)
 480                 printf("%s", _("(and reboot afterwards!)\n"));
 481 }
 482
 483 static void convert_64bit(ext2_filsys fs, int direction)
 484 {
 485         /*
 486          * Is resize2fs going to demand a fsck run? Might as well tell the
 487          * user now.
 488          */
 489         if (!fsck_requested &&
 490             ((fs->super->s_state & EXT2_ERROR_FS) ||
 491              !(fs->super->s_state & EXT2_VALID_FS) ||
 492              fs->super->s_lastcheck < fs->super->s_mtime))
 493                 request_fsck_afterwards(fs);
 494         if (fsck_requested)
 495                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 496                         direction > 0 ? "-b" : "-s", fs->device_name);
 497         else
 498                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 499                         direction > 0 ? "-b" : "-s", fs->device_name);
 500
 501         if (undo_file)
 502                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 503         if (direction > 0)
 504                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 505         else
 506                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 507 }
 508
 509 /*
 510  * Rewrite directory blocks with checksums
 511  */
 512 struct rewrite_dir_context {
 513         char *buf;
 514         errcode_t errcode;
 515         ext2_ino_t dir;
 516         int is_htree:1;
 517         int clear_htree:1;
 518 };
 519
 520 static int rewrite_dir_block(ext2_filsys fs,
 521                              blk64_t    *blocknr,
 522                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 523                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 524                              int        ref_offset EXT2FS_ATTR((unused)),
 525                              void       *priv_data)
 526 {
 527         struct ext2_dx_countlimit *dcl = NULL;
 528         struct rewrite_dir_context *ctx = priv_data;
 529         int dcl_offset, changed = 0;
 530
 531         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 532                                               ctx->dir);
 533         if (ctx->errcode)
 534                 return BLOCK_ABORT;
 535
 536         /*
 537          * if htree node... Note that if we are clearing htree structures from
 538          * the directory, we treat the htree internal block as an ordinary leaf.
 539          * The code below will do the right thing and make space for checksum
 540          * there.
 541          */
 542         if (ctx->is_htree && !ctx->clear_htree)
 543                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 544                                          &dcl, &dcl_offset);
 545         if (dcl) {
 546                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 547                         /* Ensure limit is the max size */
 548                         int max_entries = (fs->blocksize - dcl_offset) /
 549                                           sizeof(struct ext2_dx_entry);
 550                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 551                                 changed = 1;
 552                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 553                         }
 554                 } else {
 555                         /* If htree block is full then rebuild the dir */
 556                         if (ext2fs_le16_to_cpu(dcl->count) ==
 557                             ext2fs_le16_to_cpu(dcl->limit)) {
 558                                 request_dir_fsck_afterwards(fs);
 559                                 return 0;
 560                         }
 561                         /*
 562                          * Ensure dcl->limit is small enough to leave room for
 563                          * the checksum tail.
 564                          */
 565                         int max_entries = (fs->blocksize - (dcl_offset +
 566                                                 sizeof(struct ext2_dx_tail))) /
 567                                           sizeof(struct ext2_dx_entry);
 568                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 569                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 570                         /* Always rewrite checksum */
 571                         changed = 1;
 572                 }
 573         } else {
 574                 unsigned int rec_len, name_size;
 575                 char *top = ctx->buf + fs->blocksize;
 576                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 577                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 578
 579                 /* Find last and penultimate dirent */
 580                 while ((char *)de < top) {
 581                         penultimate_de = last_de;
 582                         last_de = de;
 583                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 584                         if (!ctx->errcode && !rec_len)
 585                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 586                         if (ctx->errcode)
 587                                 return BLOCK_ABORT;
 588                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 589                 }
 590                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 591                 if (ctx->errcode)
 592                         return BLOCK_ABORT;
 593                 name_size = ext2fs_dirent_name_len(last_de);
 594
 595                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 596                         if (!penultimate_de)
 597                                 return 0;
 598                         if (last_de->inode ||
 599                             name_size ||
 600                             rec_len != sizeof(struct ext2_dir_entry_tail))
 601                                 return 0;
 602                         /*
 603                          * The last dirent is unused and the right length to
 604                          * have stored a checksum.  Erase it.
 605                          */
 606                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 607                                                           &rec_len);
 608                         if (!rec_len)
 609                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 610                         if (ctx->errcode)
 611                                 return BLOCK_ABORT;
 612                         ext2fs_set_rec_len(fs, rec_len +
 613                                         sizeof(struct ext2_dir_entry_tail),
 614                                         penultimate_de);
 615                         changed = 1;
 616                 } else {
 617                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 618                         struct ext2_dir_entry_tail *t;
 619
 620                         /*
 621                          * If the last dirent looks like the tail, just update
 622                          * the checksum.
 623                          */
 624                         if (!last_de->inode &&
 625                             rec_len == csum_size) {
 626                                 t = (struct ext2_dir_entry_tail *)last_de;
 627                                 t->det_reserved_name_len =
 628                                                 EXT2_DIR_NAME_LEN_CSUM;
 629                                 changed = 1;
 630                                 goto out;
 631                         }
 632                         if (name_size & 3)
 633                                 name_size = (name_size & ~3) + 4;
 634                         /* If there's not enough space for the tail, e2fsck */
 635                         if (rec_len <= (8 + name_size + csum_size)) {
 636                                 request_dir_fsck_afterwards(fs);
 637                                 return 0;
 638                         }
 639                         /* Shorten that last de and insert the tail */
 640                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 641                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 642                         ext2fs_initialize_dirent_tail(fs, t);
 643
 644                         /* Always update checksum */
 645                         changed = 1;
 646                 }
 647         }
 648
 649 out:
 650         if (!changed)
 651                 return 0;
 652
 653         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 654                                                0, ctx->dir);
 655         if (ctx->errcode)
 656                 return BLOCK_ABORT;
 657
 658         return 0;
 659 }
 660
 661 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 662                                    struct ext2_inode *inode)
 663 {
 664         errcode_t       retval;
 665         struct rewrite_dir_context ctx;
 666
 667         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 668         if (retval)
 669                 return retval;
 670
 671         ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
 672         ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
 673         ctx.dir = dir;
 674         ctx.errcode = 0;
 675         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 676                                                 BLOCK_FLAG_DATA_ONLY,
 677                                        0, rewrite_dir_block, &ctx);
 678
 679         ext2fs_free_mem(&ctx.buf);
 680         if (retval)
 681                 return retval;
 682
 683         if (ctx.is_htree && ctx.clear_htree) {
 684                 inode->i_flags &= ~EXT2_INDEX_FL;
 685                 retval = ext2fs_write_inode(fs, dir, inode);
 686                 if (retval)
 687                         return retval;
 688         }
 689
 690         return ctx.errcode;
 691 }
 692
 693 /*
 694  * Context information that does not change across rewrite_one_inode()
 695  * invocations.
 696  */
 697 struct rewrite_context {
 698         ext2_filsys fs;
 699         struct ext2_inode *zero_inode;
 700         char *ea_buf;
 701         int inode_size;
 702 };
 703
 704 #define fatal_err(code, args...)                \
 705         do {                                    \
 706                 com_err(__func__, code, args);  \
 707                 exit(1);                        \
 708         } while (0);
 709
 710 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 711                                  struct ext2_inode *inode)
 712 {
 713         errcode_t retval;
 714         ext2_file_t file;
 715         __u32 hash;
 716
 717         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 718         if (retval)
 719                 fatal_err(retval, "open ea_inode");
 720         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 721                                   NULL);
 722         if (retval)
 723                 fatal_err(retval, "read ea_inode");
 724         retval = ext2fs_file_close(file);
 725         if (retval)
 726                 fatal_err(retval, "close ea_inode");
 727
 728         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 729                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 730         ext2fs_set_ea_inode_hash(inode, hash);
 731 }
 732
 733 static int update_xattr_entry_hashes(ext2_filsys fs,
 734                                      struct ext2_ext_attr_entry *entry,
 735                                      struct ext2_ext_attr_entry *end)
 736 {
 737         int modified = 0;
 738         errcode_t retval;
 739
 740         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 741                 if (entry->e_value_inum) {
 742                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 743                                                              &entry->e_hash);
 744                         if (retval)
 745                                 fatal_err(retval, "hash ea_inode entry");
 746                         modified = 1;
 747                 }
 748                 entry = EXT2_EXT_ATTR_NEXT(entry);
 749         }
 750         return modified;
 751 }
 752
 753 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 754                                        struct ext2_inode_large *inode)
 755 {
 756         struct ext2_ext_attr_entry *start, *end;
 757         __u32 *ea_magic;
 758
 759         if (inode->i_extra_isize == 0)
 760                 return;
 761
 762         if (inode->i_extra_isize & 3 ||
 763             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 764                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 765
 766         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 767                                 inode->i_extra_isize);
 768         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 769                 return;
 770
 771         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 772         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 773
 774         update_xattr_entry_hashes(ctx->fs, start, end);
 775 }
 776
 777 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 778                                       char *block_buf)
 779 {
 780         struct ext2_ext_attr_header *header;
 781         struct ext2_ext_attr_entry *start, *end;
 782
 783         header = (struct ext2_ext_attr_header *)block_buf;
 784         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 785                 return;
 786
 787         start = (struct ext2_ext_attr_entry *)(header+1);
 788         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 789
 790         if (update_xattr_entry_hashes(ctx->fs, start, end))
 791                 ext2fs_ext_attr_block_rehash(header, end);
 792 }
 793
 794 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 795                               struct ext2_inode *inode)
 796 {
 797         blk64_t file_acl_block;
 798         errcode_t retval;
 799
 800         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 801                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 802                         return;
 803                 memset(inode, 0, ctx->inode_size);
 804         }
 805
 806         if (inode->i_flags & EXT4_EA_INODE_FL)
 807                 update_ea_inode_hash(ctx, ino, inode);
 808
 809         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 810                 update_inline_xattr_hashes(ctx,
 811                                            (struct ext2_inode_large *)inode);
 812
 813         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 814         if (retval)
 815                 fatal_err(retval, "while writing inode");
 816
 817         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 818         if (retval)
 819                 fatal_err(retval, "while rewriting extents");
 820
 821         if (LINUX_S_ISDIR(inode->i_mode) &&
 822             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 823                 retval = rewrite_directory(ctx->fs, ino, inode);
 824                 if (retval)
 825                         fatal_err(retval, "while rewriting directories");
 826         }
 827
 828         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 829         if (!file_acl_block)
 830                 return;
 831
 832         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 833                                        ino);
 834         if (retval)
 835                 fatal_err(retval, "while rewriting extended attribute");
 836
 837         update_block_xattr_hashes(ctx, ctx->ea_buf);
 838         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 839                                         ino);
 840         if (retval)
 841                 fatal_err(retval, "while rewriting extended attribute");
 842 }
 843
 844 #define REWRITE_EA_FL           0x01    /* Rewrite EA inodes */
 845 #define REWRITE_DIR_FL          0x02    /* Rewrite directories */
 846 #define REWRITE_NONDIR_FL       0x04    /* Rewrite other inodes */
 847 #define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
 848
 849 static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
 850 {
 851         ext2_inode_scan scan;
 852         errcode_t       retval;
 853         ext2_ino_t      ino;
 854         struct ext2_inode *inode;
 855         int rewrite;
 856
 857         retval = ext2fs_get_mem(ctx->inode_size, &inode);
 858         if (retval)
 859                 fatal_err(retval, "while allocating memory");
 860
 861         retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
 862         if (retval)
 863                 fatal_err(retval, "while opening inode scan");
 864
 865         do {
 866                 retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 867                                                     ctx->inode_size);
 868                 if (retval)
 869                         fatal_err(retval, "while getting next inode");
 870                 if (!ino)
 871                         break;
 872
 873                 rewrite = 0;
 874                 if (inode->i_flags & EXT4_EA_INODE_FL) {
 875                         if (flags & REWRITE_EA_FL)
 876                                 rewrite = 1;
 877                 } else if (LINUX_S_ISDIR(inode->i_mode)) {
 878                         if (flags & REWRITE_DIR_FL)
 879                                 rewrite = 1;
 880                 } else {
 881                         if (flags & REWRITE_NONDIR_FL)
 882                                 rewrite = 1;
 883                 }
 884                 if (rewrite)
 885                         rewrite_one_inode(ctx, ino, inode);
 886         } while (ino);
 887         ext2fs_close_inode_scan(scan);
 888         ext2fs_free_mem(&inode);
 889 }
 890
 891 /*
 892  * Forcibly rewrite checksums in inodes specified by 'flags'
 893  */
 894 static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
 895 {
 896         struct rewrite_context ctx = {
 897                 .fs = fs,
 898                 .inode_size = EXT2_INODE_SIZE(fs->super),
 899         };
 900         errcode_t retval;
 901
 902         if (fs->super->s_creator_os == EXT2_OS_HURD)
 903                 return;
 904
 905         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 906         if (retval)
 907                 fatal_err(retval, "while allocating memory");
 908
 909         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 910         if (retval)
 911                 fatal_err(retval, "while allocating memory");
 912
 913         /*
 914          * Extended attribute inodes have a lookup hash that needs to be
 915          * recalculated with the new csum_seed. Other inodes referencing xattr
 916          * inodes need this value to be up to date. That's why we do two passes:
 917          *
 918          * pass 1: update xattr inodes to update their lookup hash as well as
 919          *         other checksums.
 920          *
 921          * pass 2: go over other inodes to update their checksums.
 922          */
 923         if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
 924                 rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
 925         flags &= ~REWRITE_EA_FL;
 926         rewrite_inodes_pass(&ctx, flags);
 927
 928         ext2fs_free_mem(&ctx.zero_inode);
 929         ext2fs_free_mem(&ctx.ea_buf);
 930 }
 931
 932 static void rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 933 {
 934         errcode_t retval;
 935         dgrp_t i;
 936
 937         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 938         ext2fs_init_csum_seed(fs);
 939         for (i = 0; i < fs->group_desc_count; i++)
 940                 ext2fs_group_desc_csum_set(fs, i);
 941         retval = ext2fs_read_bitmaps(fs);
 942         if (retval)
 943                 fatal_err(retval, "while reading bitmaps");
 944         rewrite_inodes(fs, flags);
 945         ext2fs_mark_ib_dirty(fs);
 946         ext2fs_mark_bb_dirty(fs);
 947         ext2fs_mmp_update2(fs, 1);
 948         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 949         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 950         if (ext2fs_has_feature_metadata_csum(fs->super))
 951                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 952         else
 953                 fs->super->s_checksum_type = 0;
 954         ext2fs_mark_super_dirty(fs);
 955 }
 956
 957 static void enable_uninit_bg(ext2_filsys fs)
 958 {
 959         struct ext2_group_desc *gd;
 960         dgrp_t i;
 961
 962         for (i = 0; i < fs->group_desc_count; i++) {
 963                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 964                 gd->bg_itable_unused = 0;
 965                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 966                 ext2fs_group_desc_csum_set(fs, i);
 967         }
 968         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 969 }
 970
 971 static errcode_t zero_empty_inodes(ext2_filsys fs)
 972 {
 973         int length = EXT2_INODE_SIZE(fs->super);
 974         struct ext2_inode *inode = NULL;
 975         ext2_inode_scan scan;
 976         errcode_t       retval;
 977         ext2_ino_t      ino;
 978
 979         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 980         if (retval)
 981                 goto out;
 982
 983         retval = ext2fs_get_mem(length, &inode);
 984         if (retval)
 985                 goto out;
 986
 987         do {
 988                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 989                 if (retval)
 990                         goto out;
 991                 if (!ino)
 992                         break;
 993                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 994                         memset(inode, 0, length);
 995                         retval = ext2fs_write_inode_full(fs, ino, inode,
 996                                                          length);
 997                         if (retval)
 998                                 goto out;
 999                 }
1000         } while (1);
1001
1002 out:
1003         ext2fs_free_mem(&inode);
1004         ext2fs_close_inode_scan(scan);
1005         return retval;
1006 }
1007
1008 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1009 {
1010         struct ext2_group_desc *gd;
1011         dgrp_t i;
1012         errcode_t retval;
1013         blk64_t b, c, d;
1014
1015         /* Load bitmaps to ensure that the uninit ones get written out */
1016         fs->super->s_feature_ro_compat |= csum_feature_flag;
1017         retval = ext2fs_read_bitmaps(fs);
1018         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1019         if (retval) {
1020                 com_err("disable_uninit_bg", retval,
1021                         "while reading bitmaps");
1022                 request_fsck_afterwards(fs);
1023                 return retval;
1024         }
1025         ext2fs_mark_ib_dirty(fs);
1026         ext2fs_mark_bb_dirty(fs);
1027
1028         /* If we're only turning off uninit_bg, zero the inodes */
1029         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1030                 retval = zero_empty_inodes(fs);
1031                 if (retval) {
1032                         com_err("disable_uninit_bg", retval,
1033                                 "while zeroing unused inodes");
1034                         request_fsck_afterwards(fs);
1035                         return retval;
1036                 }
1037         }
1038
1039         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1040         for (i = 0; i < fs->group_desc_count; i++) {
1041                 b = ext2fs_block_bitmap_loc(fs, i);
1042                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1043                 b = ext2fs_inode_bitmap_loc(fs, i);
1044                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1045
1046                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1047                 if (retval == 0 && b)
1048                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1049                 if (retval == 0 && c)
1050                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1051                 if (retval == 0 && d)
1052                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1053                 if (retval) {
1054                         com_err("disable_uninit_bg", retval,
1055                                 "while initializing block bitmaps");
1056                         request_fsck_afterwards(fs);
1057                 }
1058
1059                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1060                 gd->bg_itable_unused = 0;
1061                 gd->bg_flags = 0;
1062                 ext2fs_group_desc_csum_set(fs, i);
1063         }
1064         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1065         ext2fs_mark_super_dirty(fs);
1066
1067         return 0;
1068 }
1069
1070 static void
1071 try_confirm_csum_seed_support(void)
1072 {
1073         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1074                 fputs(_("WARNING: Could not confirm kernel support for "
1075                         "metadata_csum_seed.\n  This requires Linux >= "
1076                         "v4.4.\n"), stderr);
1077 }
1078
1079 /*
1080  * Update the feature set as provided by the user.
1081  */
1082 static int update_feature_set(ext2_filsys fs, char *features)
1083 {
1084         struct ext2_super_block *sb = fs->super;
1085         __u32           old_features[3];
1086         int             type_err;
1087         unsigned int    mask_err;
1088         errcode_t       err;
1089         enum quota_type qtype;
1090
1091 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1092                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1093 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1094                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1095 #define FEATURE_CHANGED(type, mask) ((mask) & \
1096                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1097
1098         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1099         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1100         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1101
1102         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1103                               ok_features, clear_ok_features,
1104                               &type_err, &mask_err)) {
1105                 if (!mask_err)
1106                         fprintf(stderr,
1107                                 _("Invalid filesystem option set: %s\n"),
1108                                 features);
1109                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1110                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1111                                           "not supported.\n"),
1112                                 e2p_feature2string(type_err &
1113                                                    E2P_FEATURE_TYPE_MASK,
1114                                                    mask_err));
1115                 else
1116                         fprintf(stderr, _("Setting filesystem feature '%s' "
1117                                           "not supported.\n"),
1118                                 e2p_feature2string(type_err, mask_err));
1119                 return 1;
1120         }
1121
1122         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1123                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1124                     !(mount_flags & EXT2_MF_READONLY)) {
1125                         fputs(_("The has_journal feature may only be "
1126                                 "cleared when the filesystem is\n"
1127                                 "unmounted or mounted "
1128                                 "read-only.\n"), stderr);
1129                         return 1;
1130                 }
1131                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1132                     f_flag < 2) {
1133                         fputs(_("The needs_recovery flag is set.  "
1134                                 "Please run e2fsck before clearing\n"
1135                                 "the has_journal flag.\n"), stderr);
1136                         return 1;
1137                 }
1138                 if (sb->s_journal_inum) {
1139                         if (remove_journal_inode(fs))
1140                                 return 1;
1141                 }
1142                 if (sb->s_journal_dev) {
1143                         if (remove_journal_device(fs))
1144                                 return 1;
1145                 }
1146         }
1147
1148         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1149                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1150                 if (ext2fs_has_feature_meta_bg(sb)) {
1151                         fputs(_("Setting filesystem feature 'sparse_super' "
1152                                 "not supported\nfor filesystems with "
1153                                 "the meta_bg feature enabled.\n"),
1154                                 stderr);
1155                         return 1;
1156                 }
1157         }
1158
1159         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1160                 int error;
1161
1162                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1163                     (mount_flags & EXT2_MF_READONLY)) {
1164                         fputs(_("The multiple mount protection feature can't\n"
1165                                 "be set if the filesystem is mounted or\n"
1166                                 "read-only.\n"), stderr);
1167                         return 1;
1168                 }
1169
1170                 error = ext2fs_mmp_init(fs);
1171                 if (error) {
1172                         fputs(_("\nError while enabling multiple mount "
1173                                 "protection feature."), stderr);
1174                         return 1;
1175                 }
1176
1177                 /*
1178                  * We want to update group desc with the new free blocks count
1179                  */
1180                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1181
1182                 printf(_("Multiple mount protection has been enabled "
1183                          "with update interval %ds.\n"),
1184                        sb->s_mmp_update_interval);
1185         }
1186
1187         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1188                 int error;
1189
1190                 if (mount_flags & EXT2_MF_READONLY) {
1191                         fputs(_("The multiple mount protection feature cannot\n"
1192                                 "be disabled if the filesystem is readonly.\n"),
1193                                 stderr);
1194                         return 1;
1195                 }
1196
1197                 error = ext2fs_read_bitmaps(fs);
1198                 if (error) {
1199                         fputs(_("Error while reading bitmaps\n"), stderr);
1200                         return 1;
1201                 }
1202
1203                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1204                 if (error) {
1205                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1206
1207                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1208                                 printf(_("Magic number in MMP block does not "
1209                                          "match. expected: %x, actual: %x\n"),
1210                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1211                         else
1212                                 com_err(program_name, error, "%s",
1213                                         _("while reading MMP block."));
1214                         goto mmp_error;
1215                 }
1216
1217                 /* We need to force out the group descriptors as well */
1218                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1219                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1220 mmp_error:
1221                 sb->s_mmp_block = 0;
1222                 sb->s_mmp_update_interval = 0;
1223         }
1224
1225         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1226                 /*
1227                  * If adding a journal flag, let the create journal
1228                  * code below handle setting the flag and creating the
1229                  * journal.  We supply a default size if necessary.
1230                  */
1231                 if (!journal_size)
1232                         journal_size = -1;
1233                 ext2fs_clear_feature_journal(sb);
1234         }
1235
1236         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1237                 if (!sb->s_def_hash_version)
1238                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1239                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1240                         uuid_generate((unsigned char *) sb->s_hash_seed);
1241         }
1242
1243         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
1244             ext2fs_has_feature_metadata_csum(sb)) {
1245                 if (check_fsck_needed(fs,
1246                         _("Disabling directory index on filesystem with "
1247                           "checksums could take some time.")))
1248                         return 1;
1249                 if (mount_flags & EXT2_MF_MOUNTED) {
1250                         fputs(_("Cannot disable dir_index on a mounted "
1251                                 "filesystem!\n"), stderr);
1252                         exit(1);
1253                 }
1254                 /*
1255                  * Clearing dir_index on checksummed filesystem requires
1256                  * rewriting all directories to update checksums.
1257                  */
1258                 rewrite_checksums |= REWRITE_DIR_FL;
1259         }
1260
1261         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1262                 if (ext2fs_check_desc(fs)) {
1263                         fputs(_("Clearing the flex_bg flag would "
1264                                 "cause the the filesystem to be\n"
1265                                 "inconsistent.\n"), stderr);
1266                         return 1;
1267                 }
1268         }
1269
1270         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1271                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1272                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1273                     !(mount_flags & EXT2_MF_READONLY)) {
1274                         fputs(_("The huge_file feature may only be "
1275                                 "cleared when the filesystem is\n"
1276                                 "unmounted or mounted "
1277                                 "read-only.\n"), stderr);
1278                         return 1;
1279                 }
1280         }
1281
1282         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1283                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1284                 if (check_fsck_needed(fs,
1285                         _("Enabling checksums could take some time.")))
1286                         return 1;
1287                 if (mount_flags & EXT2_MF_MOUNTED) {
1288                         fputs(_("Cannot enable metadata_csum on a mounted "
1289                                 "filesystem!\n"), stderr);
1290                         return 1;
1291                 }
1292                 if (!ext2fs_has_feature_extents(fs->super))
1293                         printf("%s",
1294                                _("Extents are not enabled.  The file extent "
1295                                  "tree can be checksummed, whereas block maps "
1296                                  "cannot.  Not enabling extents reduces the "
1297                                  "coverage of metadata checksumming.  "
1298                                  "Re-run with -O extent to rectify.\n"));
1299                 if (!ext2fs_has_feature_64bit(fs->super))
1300                         printf("%s",
1301                                _("64-bit filesystem support is not enabled.  "
1302                                  "The larger fields afforded by this feature "
1303                                  "enable full-strength checksumming.  "
1304                                  "Run resize2fs -b to rectify.\n"));
1305                 rewrite_checksums = REWRITE_ALL;
1306                 /* metadata_csum supersedes uninit_bg */
1307                 ext2fs_clear_feature_gdt_csum(fs->super);
1308
1309                 /* if uninit_bg was previously off, rewrite group desc */
1310                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1311                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1312                         enable_uninit_bg(fs);
1313
1314                 /*
1315                  * Since metadata_csum supersedes uninit_bg, pretend like
1316                  * uninit_bg has been off all along.
1317                  */
1318                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1319                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1320         }
1321
1322         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1323                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1324                 __u32   test_features[3];
1325
1326                 if (check_fsck_needed(fs,
1327                         _("Disabling checksums could take some time.")))
1328                         return 1;
1329                 if (mount_flags & EXT2_MF_MOUNTED) {
1330                         fputs(_("Cannot disable metadata_csum on a mounted "
1331                                 "filesystem!\n"), stderr);
1332                         return 1;
1333                 }
1334                 rewrite_checksums = REWRITE_ALL;
1335
1336                 /* Enable uninit_bg unless the user expressly turned it off */
1337                 memcpy(test_features, old_features, sizeof(test_features));
1338                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1339                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1340                 e2p_edit_feature2(features, test_features, ok_features,
1341                                   clear_ok_features, NULL, NULL);
1342                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1343                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1344                         ext2fs_set_feature_gdt_csum(fs->super);
1345
1346                 /*
1347                  * If we're turning off metadata_csum and not turning on
1348                  * uninit_bg, rewrite group desc.
1349                  */
1350                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1351                         err = disable_uninit_bg(fs,
1352                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1353                         if (err)
1354                                 return 1;
1355                 } else
1356                         /*
1357                          * metadata_csum previously provided uninit_bg, so if
1358                          * we're also setting the uninit_bg feature bit,
1359                          * pretend like it was previously enabled.  Checksums
1360                          * will be rewritten with crc16 later.
1361                          */
1362                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1363                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1364                 fs->super->s_checksum_seed = 0;
1365                 ext2fs_clear_feature_csum_seed(fs->super);
1366         }
1367
1368         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1369                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1370                 if (mount_flags & EXT2_MF_MOUNTED) {
1371                         fputs(_("Cannot enable uninit_bg on a mounted "
1372                                 "filesystem!\n"), stderr);
1373                         return 1;
1374                 }
1375
1376                 /* Do not enable uninit_bg when metadata_csum enabled */
1377                 if (ext2fs_has_feature_metadata_csum(fs->super))
1378                         ext2fs_clear_feature_gdt_csum(fs->super);
1379                 else
1380                         enable_uninit_bg(fs);
1381         }
1382
1383         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1384                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1385                 if (mount_flags & EXT2_MF_MOUNTED) {
1386                         fputs(_("Cannot disable uninit_bg on a mounted "
1387                                 "filesystem!\n"), stderr);
1388                         return 1;
1389                 }
1390
1391                 err = disable_uninit_bg(fs,
1392                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1393                 if (err)
1394                         return 1;
1395         }
1396
1397         /*
1398          * We don't actually toggle 64bit; resize2fs does that.  But this
1399          * must come after the metadata_csum feature_on so that it won't
1400          * complain about the lack of 64bit.
1401          */
1402         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1403                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1404                 if (mount_flags & EXT2_MF_MOUNTED) {
1405                         fprintf(stderr, _("Cannot enable 64-bit mode "
1406                                           "while mounted!\n"));
1407                         return 1;
1408                 }
1409                 ext2fs_clear_feature_64bit(sb);
1410                 feature_64bit = 1;
1411         }
1412         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1413                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1414                 if (mount_flags & EXT2_MF_MOUNTED) {
1415                         fprintf(stderr, _("Cannot disable 64-bit mode "
1416                                           "while mounted!\n"));
1417                         return 1;
1418                 }
1419                 ext2fs_set_feature_64bit(sb);
1420                 feature_64bit = -1;
1421         }
1422
1423         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1424                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1425                 /*
1426                  * Set the Q_flag here and handle the quota options in the code
1427                  * below.
1428                  */
1429                 if (!Q_flag) {
1430                         Q_flag = 1;
1431                         /* Enable usr/grp quota by default */
1432                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1433                                 if (qtype != PRJQUOTA)
1434                                         quota_enable[qtype] = QOPT_ENABLE;
1435                                 else
1436                                         quota_enable[qtype] = QOPT_DISABLE;
1437                         }
1438                 }
1439                 ext2fs_clear_feature_quota(sb);
1440         }
1441
1442         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1443                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1444                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1445                         fprintf(stderr, _("Cannot enable project feature; "
1446                                           "inode size too small.\n"));
1447                         return 1;
1448                 }
1449                 Q_flag = 1;
1450                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1451         }
1452
1453         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1454                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1455                 Q_flag = 1;
1456                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1457         }
1458
1459         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1460                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1461                 /*
1462                  * Set the Q_flag here and handle the quota options in the code
1463                  * below.
1464                  */
1465                 if (Q_flag)
1466                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1467                                 "arguments.\n"), stderr);
1468                 Q_flag = 1;
1469                 /* Disable all quota by default */
1470                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1471                         quota_enable[qtype] = QOPT_DISABLE;
1472         }
1473
1474         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1475                 fs->super->s_encrypt_algos[0] =
1476                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1477                 fs->super->s_encrypt_algos[1] =
1478                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1479         }
1480
1481         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1482                 if (mount_flags & EXT2_MF_MOUNTED) {
1483                         fputs(_("The casefold feature may only be enabled when "
1484                                 "the filesystem is unmounted.\n"), stderr);
1485                         return 1;
1486                 }
1487                 fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
1488                 fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
1489                 enabling_casefold = 1;
1490         }
1491
1492         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1493                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1494                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1495                         fputs(_("Setting feature 'metadata_csum_seed' "
1496                                 "is only supported\non filesystems with "
1497                                 "the metadata_csum feature enabled.\n"),
1498                                 stderr);
1499                         return 1;
1500                 }
1501                 try_confirm_csum_seed_support();
1502                 fs->super->s_checksum_seed = fs->csum_seed;
1503         }
1504
1505         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1506                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1507                 __le32 uuid_seed;
1508
1509                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1510                                         sizeof(fs->super->s_uuid));
1511                 if (fs->super->s_checksum_seed != uuid_seed) {
1512                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1513                                 fputs(_("UUID has changed since enabling "
1514                 "metadata_csum.  Filesystem must be unmounted "
1515                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1516                                       stderr);
1517                                 return 1;
1518                         }
1519                         if (check_fsck_needed(fs, _("Recalculating checksums "
1520                                                     "could take some time.")))
1521                                 return 1;
1522                         rewrite_checksums = REWRITE_ALL;
1523                 }
1524         }
1525
1526         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1527             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1528              sb->s_feature_incompat))
1529                 ext2fs_update_dynamic_rev(fs);
1530
1531         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1532                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1533             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1534                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1535             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1536                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1537             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1538                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1539             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1540                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1541                 request_fsck_afterwards(fs);
1542
1543         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1544             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1545             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1546                 ext2fs_mark_super_dirty(fs);
1547
1548         return 0;
1549 }
1550
1551 /*
1552  * Add a journal to the filesystem.
1553  */
1554 static int add_journal(ext2_filsys fs)
1555 {
1556         struct ext2fs_journal_params    jparams;
1557         errcode_t       retval;
1558         ext2_filsys     jfs;
1559         io_manager      io_ptr;
1560
1561         if (ext2fs_has_feature_journal(fs->super)) {
1562                 fputs(_("The filesystem already has a journal.\n"), stderr);
1563                 goto err;
1564         }
1565         if (journal_device) {
1566                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1567                                         NULL))
1568                         proceed_question(-1);
1569                 check_mount(journal_device, 0, _("journal"));
1570 #ifdef CONFIG_TESTIO_DEBUG
1571                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1572                         io_ptr = test_io_manager;
1573                         test_io_backing_manager = unix_io_manager;
1574                 } else
1575 #endif
1576                         io_ptr = unix_io_manager;
1577                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1578                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1579                                      fs->blocksize, io_ptr, &jfs);
1580                 if (retval) {
1581                         com_err(program_name, retval,
1582                                 _("\n\twhile trying to open journal on %s\n"),
1583                                 journal_device);
1584                         goto err;
1585                 }
1586                 printf(_("Creating journal on device %s: "),
1587                        journal_device);
1588                 fflush(stdout);
1589
1590                 retval = ext2fs_add_journal_device(fs, jfs);
1591                 ext2fs_close_free(&jfs);
1592                 if (retval) {
1593                         com_err(program_name, retval,
1594                                 _("while adding filesystem to journal on %s"),
1595                                 journal_device);
1596                         goto err;
1597                 }
1598                 fputs(_("done\n"), stdout);
1599         } else if (journal_size) {
1600                 fputs(_("Creating journal inode: "), stdout);
1601                 fflush(stdout);
1602                 figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
1603
1604                 if (journal_location_string)
1605                         journal_location =
1606                                 parse_num_blocks2(journal_location_string,
1607                                                   fs->super->s_log_block_size);
1608                 retval = ext2fs_add_journal_inode3(fs, &jparams,
1609                                                    journal_location,
1610                                                    journal_flags);
1611                 if (retval) {
1612                         fprintf(stderr, "\n");
1613                         com_err(program_name, retval, "%s",
1614                                 _("\n\twhile trying to create journal file"));
1615                         return retval;
1616                 }
1617                 fs->super->s_overhead_clusters += EXT2FS_NUM_B2C(fs,
1618                         jparams.num_journal_blocks + jparams.num_fc_blocks);
1619                 ext2fs_mark_super_dirty(fs);
1620                 fputs(_("done\n"), stdout);
1621
1622                 /*
1623                  * If the filesystem wasn't mounted, we need to force
1624                  * the block group descriptors out.
1625                  */
1626                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1627                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1628         }
1629         print_check_message(fs->super->s_max_mnt_count,
1630                             fs->super->s_checkinterval);
1631         return 0;
1632
1633 err:
1634         free(journal_device);
1635         return 1;
1636 }
1637
1638 static int handle_quota_options(ext2_filsys fs)
1639 {
1640         errcode_t retval;
1641         quota_ctx_t qctx;
1642         ext2_ino_t qf_ino;
1643         enum quota_type qtype;
1644         unsigned int qtype_bits = 0;
1645         int need_dirty = 0;
1646
1647         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1648                 if (quota_enable[qtype] != 0)
1649                         break;
1650         if (qtype == MAXQUOTAS)
1651                 /* Nothing to do. */
1652                 return 0;
1653
1654         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1655             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1656                 fprintf(stderr, _("Cannot enable project quota; "
1657                                   "inode size too small.\n"));
1658                 return 1;
1659         }
1660
1661         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1662                 if (quota_enable[qtype] == QOPT_ENABLE)
1663                         qtype_bits |= 1 << qtype;
1664         }
1665
1666         retval = quota_init_context(&qctx, fs, qtype_bits);
1667         if (retval) {
1668                 com_err(program_name, retval,
1669                         _("while initializing quota context in support library"));
1670                 return 1;
1671         }
1672
1673         if (qtype_bits)
1674                 quota_compute_usage(qctx);
1675
1676         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1677                 if (quota_enable[qtype] == QOPT_ENABLE &&
1678                     *quota_sb_inump(fs->super, qtype) == 0) {
1679                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1680                                 retval = quota_read_all_dquots(qctx, qf_ino,
1681                                                                qtype,
1682                                                                QREAD_LIMITS);
1683                                 if (retval) {
1684                                         com_err(program_name, retval,
1685                                                 _("while updating quota limits (%d)"),
1686                                                 qtype);
1687                                 quota_errout:
1688                                         quota_release_context(&qctx);
1689                                         return 1;
1690                                 }
1691                         }
1692                         retval = quota_write_inode(qctx, 1 << qtype);
1693                         if (retval) {
1694                                 com_err(program_name, retval,
1695                                         _("while writing quota file (%d)"),
1696                                         qtype);
1697                                 goto quota_errout;
1698                         }
1699                         /* Enable Quota feature if one of quota enabled */
1700                         if (!ext2fs_has_feature_quota(fs->super)) {
1701                                 ext2fs_set_feature_quota(fs->super);
1702                                 need_dirty = 1;
1703                         }
1704                         if (qtype == PRJQUOTA &&
1705                             !ext2fs_has_feature_project(fs->super)) {
1706                                 ext2fs_set_feature_project(fs->super);
1707                                 need_dirty = 1;
1708                         }
1709                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1710                         retval = quota_remove_inode(fs, qtype);
1711                         if (retval) {
1712                                 com_err(program_name, retval,
1713                                         _("while removing quota file (%d)"),
1714                                         qtype);
1715                                 goto quota_errout;
1716                         }
1717                         if (qtype == PRJQUOTA) {
1718                                 ext2fs_clear_feature_project(fs->super);
1719                                 need_dirty = 1;
1720                         }
1721                 }
1722         }
1723
1724         quota_release_context(&qctx);
1725         /* Clear Quota feature if all quota types disabled. */
1726         if (!qtype_bits) {
1727                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1728                         if (*quota_sb_inump(fs->super, qtype))
1729                                 break;
1730                 if (qtype == MAXQUOTAS) {
1731                         ext2fs_clear_feature_quota(fs->super);
1732                         need_dirty = 1;
1733                 }
1734
1735         }
1736         if (need_dirty)
1737                 ext2fs_mark_super_dirty(fs);
1738         return 0;
1739 }
1740
1741 static int option_handle_function(char *token)
1742 {
1743         if (strncmp(token, "usr", 3) == 0) {
1744                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1745         } else if (strncmp(token, "^usr", 4) == 0) {
1746                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1747         } else if (strncmp(token, "grp", 3) == 0) {
1748                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1749         } else if (strncmp(token, "^grp", 4) == 0) {
1750                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1751         } else if (strncmp(token, "prj", 3) == 0) {
1752                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1753         } else if (strncmp(token, "^prj", 4) == 0) {
1754                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1755         } else {
1756                 fputs(_("\nBad quota options specified.\n\n"
1757                         "Following valid quota options are available "
1758                         "(pass by separating with comma):\n"
1759                         "\t[^]usr[quota]\n"
1760                         "\t[^]grp[quota]\n"
1761                         "\t[^]prj[quota]\n"
1762                         "\n\n"), stderr);
1763                 return 1;
1764         }
1765         return 0;
1766 }
1767
1768 static void parse_e2label_options(int argc, char ** argv)
1769 {
1770         if ((argc < 2) || (argc > 3)) {
1771                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1772                 exit(1);
1773         }
1774         io_options = strchr(argv[1], '?');
1775         if (io_options)
1776                 *io_options++ = 0;
1777         device_name = blkid_get_devname(NULL, argv[1], NULL);
1778         if (!device_name) {
1779                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1780                         argv[1]);
1781                 exit(1);
1782         }
1783         open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
1784         if (argc == 3) {
1785                 open_flag |= EXT2_FLAG_RW;
1786                 L_flag = 1;
1787                 new_label = argv[2];
1788         } else
1789                 print_label++;
1790 }
1791
1792 static time_t parse_time(char *str)
1793 {
1794         struct  tm      ts;
1795
1796         if (strcmp(str, "now") == 0) {
1797                 return (time(0));
1798         }
1799         memset(&ts, 0, sizeof(ts));
1800 #ifdef HAVE_STRPTIME
1801         strptime(str, "%Y%m%d%H%M%S", &ts);
1802 #else
1803         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1804                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1805         ts.tm_year -= 1900;
1806         ts.tm_mon -= 1;
1807         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1808             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1809             ts.tm_min > 59 || ts.tm_sec > 61)
1810                 ts.tm_mday = 0;
1811 #endif
1812         if (ts.tm_mday == 0) {
1813                 com_err(program_name, 0,
1814                         _("Couldn't parse date/time specifier: %s"),
1815                         str);
1816                 usage();
1817         }
1818         ts.tm_isdst = -1;
1819         return (mktime(&ts));
1820 }
1821
1822 static void parse_tune2fs_options(int argc, char **argv)
1823 {
1824         int c;
1825         char *tmp;
1826         struct group *gr;
1827         struct passwd *pw;
1828         int ret;
1829         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1830
1831         open_flag = 0;
1832         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1833         while ((c = getopt(argc, argv, optstring)) != EOF)
1834                 switch (c) {
1835                 case 'c':
1836                         open_flag = EXT2_FLAG_RW;
1837                         c_flag = 1;
1838                         if (strcmp(optarg, "random") == 0) {
1839                                 max_mount_count = 65536;
1840                                 break;
1841                         }
1842                         max_mount_count = strtol(optarg, &tmp, 0);
1843                         if (*tmp || max_mount_count > 16000 ||
1844                             max_mount_count < -16000) {
1845                                 com_err(program_name, 0,
1846                                         _("bad mounts count - %s"),
1847                                         optarg);
1848                                 usage();
1849                         }
1850                         if (max_mount_count == 0)
1851                                 max_mount_count = -1;
1852                         break;
1853                 case 'C':
1854                         mount_count = strtoul(optarg, &tmp, 0);
1855                         if (*tmp || mount_count > 16000) {
1856                                 com_err(program_name, 0,
1857                                         _("bad mounts count - %s"),
1858                                         optarg);
1859                                 usage();
1860                         }
1861                         C_flag = 1;
1862                         open_flag = EXT2_FLAG_RW;
1863                         break;
1864                 case 'e':
1865                         if (strcmp(optarg, "continue") == 0)
1866                                 errors = EXT2_ERRORS_CONTINUE;
1867                         else if (strcmp(optarg, "remount-ro") == 0)
1868                                 errors = EXT2_ERRORS_RO;
1869                         else if (strcmp(optarg, "panic") == 0)
1870                                 errors = EXT2_ERRORS_PANIC;
1871                         else {
1872                                 com_err(program_name, 0,
1873                                         _("bad error behavior - %s"),
1874                                         optarg);
1875                                 usage();
1876                         }
1877                         e_flag = 1;
1878                         open_flag = EXT2_FLAG_RW;
1879                         break;
1880                 case 'E':
1881                         extended_cmd = optarg;
1882                         open_flag |= EXT2_FLAG_RW;
1883                         break;
1884                 case 'f': /* Force */
1885                         f_flag++;
1886                         break;
1887                 case 'g':
1888                         resgid = strtoul(optarg, &tmp, 0);
1889                         if (*tmp) {
1890                                 gr = getgrnam(optarg);
1891                                 if (gr == NULL)
1892                                         tmp = optarg;
1893                                 else {
1894                                         resgid = gr->gr_gid;
1895                                         *tmp = 0;
1896                                 }
1897                         }
1898                         if (*tmp) {
1899                                 com_err(program_name, 0,
1900                                         _("bad gid/group name - %s"),
1901                                         optarg);
1902                                 usage();
1903                         }
1904                         g_flag = 1;
1905                         open_flag = EXT2_FLAG_RW;
1906                         break;
1907                 case 'i':
1908                         interval = strtoul(optarg, &tmp, 0);
1909                         switch (*tmp) {
1910                         case 's':
1911                                 tmp++;
1912                                 break;
1913                         case '\0':
1914                         case 'd':
1915                         case 'D': /* days */
1916                                 interval *= 86400;
1917                                 if (*tmp != '\0')
1918                                         tmp++;
1919                                 break;
1920                         case 'm':
1921                         case 'M': /* months! */
1922                                 interval *= 86400 * 30;
1923                                 tmp++;
1924                                 break;
1925                         case 'w':
1926                         case 'W': /* weeks */
1927                                 interval *= 86400 * 7;
1928                                 tmp++;
1929                                 break;
1930                         }
1931                         if (*tmp) {
1932                                 com_err(program_name, 0,
1933                                         _("bad interval - %s"), optarg);
1934                                 usage();
1935                         }
1936                         i_flag = 1;
1937                         open_flag = EXT2_FLAG_RW;
1938                         break;
1939                 case 'j':
1940                         if (!journal_size)
1941                                 journal_size = -1;
1942                         open_flag = EXT2_FLAG_RW;
1943                         break;
1944                 case 'J':
1945                         parse_journal_opts(optarg);
1946                         open_flag = EXT2_FLAG_RW;
1947                         break;
1948                 case 'l':
1949                         l_flag = 1;
1950                         break;
1951                 case 'L':
1952                         new_label = optarg;
1953                         L_flag = 1;
1954                         open_flag |= EXT2_FLAG_RW |
1955                                 EXT2_FLAG_JOURNAL_DEV_OK;
1956                         break;
1957                 case 'm':
1958                         reserved_ratio = strtod(optarg, &tmp);
1959                         if (*tmp || reserved_ratio > 50 ||
1960                             reserved_ratio < 0) {
1961                                 com_err(program_name, 0,
1962                                         _("bad reserved block ratio - %s"),
1963                                         optarg);
1964                                 usage();
1965                         }
1966                         m_flag = 1;
1967                         open_flag = EXT2_FLAG_RW;
1968                         break;
1969                 case 'M':
1970                         new_last_mounted = optarg;
1971                         M_flag = 1;
1972                         open_flag = EXT2_FLAG_RW;
1973                         break;
1974                 case 'o':
1975                         if (mntopts_cmd) {
1976                                 com_err(program_name, 0, "%s",
1977                                         _("-o may only be specified once"));
1978                                 usage();
1979                         }
1980                         mntopts_cmd = optarg;
1981                         open_flag = EXT2_FLAG_RW;
1982                         break;
1983                 case 'O':
1984                         if (features_cmd) {
1985                                 com_err(program_name, 0, "%s",
1986                                         _("-O may only be specified once"));
1987                                 usage();
1988                         }
1989                         features_cmd = optarg;
1990                         open_flag = EXT2_FLAG_RW;
1991                         break;
1992                 case 'Q':
1993                         Q_flag = 1;
1994                         ret = parse_quota_opts(optarg, option_handle_function);
1995                         if (ret)
1996                                 exit(1);
1997                         open_flag = EXT2_FLAG_RW;
1998                         break;
1999                 case 'r':
2000                         reserved_blocks = strtoul(optarg, &tmp, 0);
2001                         if (*tmp) {
2002                                 com_err(program_name, 0,
2003                                         _("bad reserved blocks count - %s"),
2004                                         optarg);
2005                                 usage();
2006                         }
2007                         r_flag = 1;
2008                         open_flag = EXT2_FLAG_RW;
2009                         break;
2010                 case 's': /* Deprecated */
2011                         s_flag = atoi(optarg);
2012                         open_flag = EXT2_FLAG_RW;
2013                         break;
2014                 case 'T':
2015                         T_flag = 1;
2016                         last_check_time = parse_time(optarg);
2017                         open_flag = EXT2_FLAG_RW;
2018                         break;
2019                 case 'u':
2020                                 resuid = strtoul(optarg, &tmp, 0);
2021                                 if (*tmp) {
2022                                         pw = getpwnam(optarg);
2023                                         if (pw == NULL)
2024                                                 tmp = optarg;
2025                                         else {
2026                                                 resuid = pw->pw_uid;
2027                                                 *tmp = 0;
2028                                         }
2029                                 }
2030                                 if (*tmp) {
2031                                         com_err(program_name, 0,
2032                                                 _("bad uid/user name - %s"),
2033                                                 optarg);
2034                                         usage();
2035                                 }
2036                                 u_flag = 1;
2037                                 open_flag = EXT2_FLAG_RW;
2038                                 break;
2039                 case 'U':
2040                         new_UUID = optarg;
2041                         U_flag = 1;
2042                         open_flag = EXT2_FLAG_RW |
2043                                 EXT2_FLAG_JOURNAL_DEV_OK;
2044                         break;
2045                 case 'I':
2046                         new_inode_size = strtoul(optarg, &tmp, 0);
2047                         if (*tmp) {
2048                                 com_err(program_name, 0,
2049                                         _("bad inode size - %s"),
2050                                         optarg);
2051                                 usage();
2052                         }
2053                         if (!((new_inode_size &
2054                                (new_inode_size - 1)) == 0)) {
2055                                 com_err(program_name, 0,
2056                                         _("Inode size must be a "
2057                                           "power of two- %s"),
2058                                         optarg);
2059                                 usage();
2060                         }
2061                         open_flag = EXT2_FLAG_RW;
2062                         I_flag = 1;
2063                         break;
2064                 case 'z':
2065                         undo_file = optarg;
2066                         break;
2067                 default:
2068                         usage();
2069                 }
2070         if (optind < argc - 1 || optind == argc)
2071                 usage();
2072         if (!open_flag && !l_flag)
2073                 usage();
2074         io_options = strchr(argv[optind], '?');
2075         if (io_options)
2076                 *io_options++ = 0;
2077         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2078         if (!device_name) {
2079                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2080                         argv[optind]);
2081                 exit(1);
2082         }
2083 }
2084
2085 #ifdef CONFIG_BUILD_FINDFS
2086 void do_findfs(int argc, char **argv)
2087 {
2088         char    *dev;
2089
2090         if ((argc != 2) ||
2091             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2092                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2093                 exit(2);
2094         }
2095         dev = blkid_get_devname(NULL, argv[1], NULL);
2096         if (!dev) {
2097                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2098                         argv[1]);
2099                 exit(1);
2100         }
2101         puts(dev);
2102         exit(0);
2103 }
2104 #endif
2105
2106 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2107 {
2108         struct ext2_super_block *sb = fs->super;
2109         char    *buf, *token, *next, *p, *arg;
2110         int     len, hash_alg;
2111         int     r_usage = 0;
2112         int encoding = 0;
2113         char    *encoding_flags = NULL;
2114
2115         len = strlen(opts);
2116         buf = malloc(len+1);
2117         if (!buf) {
2118                 fprintf(stderr, "%s",
2119                         _("Couldn't allocate memory to parse options!\n"));
2120                 return 1;
2121         }
2122         strcpy(buf, opts);
2123         for (token = buf; token && *token; token = next) {
2124                 p = strchr(token, ',');
2125                 next = 0;
2126                 if (p) {
2127                         *p = 0;
2128                         next = p+1;
2129                 }
2130                 arg = strchr(token, '=');
2131                 if (arg) {
2132                         *arg = 0;
2133                         arg++;
2134                 }
2135                 if (strcmp(token, "clear-mmp") == 0 ||
2136                     strcmp(token, "clear_mmp") == 0) {
2137                         clear_mmp = 1;
2138                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2139                         unsigned long intv;
2140                         if (!arg) {
2141                                 r_usage++;
2142                                 continue;
2143                         }
2144                         intv = strtoul(arg, &p, 0);
2145                         if (*p) {
2146                                 fprintf(stderr,
2147                                         _("Invalid mmp_update_interval: %s\n"),
2148                                         arg);
2149                                 r_usage++;
2150                                 continue;
2151                         }
2152                         if (intv == 0) {
2153                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2154                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2155                                 fprintf(stderr,
2156                                         _("mmp_update_interval too big: %lu\n"),
2157                                         intv);
2158                                 r_usage++;
2159                                 continue;
2160                         }
2161                         printf(P_("Setting multiple mount protection update "
2162                                   "interval to %lu second\n",
2163                                   "Setting multiple mount protection update "
2164                                   "interval to %lu seconds\n", intv),
2165                                intv);
2166                         sb->s_mmp_update_interval = intv;
2167                         ext2fs_mark_super_dirty(fs);
2168                 } else if (!strcmp(token, "force_fsck")) {
2169                         sb->s_state |= EXT2_ERROR_FS;
2170                         printf(_("Setting filesystem error flag to force fsck.\n"));
2171                         ext2fs_mark_super_dirty(fs);
2172                 } else if (!strcmp(token, "test_fs")) {
2173                         sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2174                         printf("Setting test filesystem flag\n");
2175                         ext2fs_mark_super_dirty(fs);
2176                 } else if (!strcmp(token, "^test_fs")) {
2177                         sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2178                         printf("Clearing test filesystem flag\n");
2179                         ext2fs_mark_super_dirty(fs);
2180                 } else if (strcmp(token, "stride") == 0) {
2181                         if (!arg) {
2182                                 r_usage++;
2183                                 continue;
2184                         }
2185                         stride = strtoul(arg, &p, 0);
2186                         if (*p) {
2187                                 fprintf(stderr,
2188                                         _("Invalid RAID stride: %s\n"),
2189                                         arg);
2190                                 r_usage++;
2191                                 continue;
2192                         }
2193                         stride_set = 1;
2194                 } else if (strcmp(token, "stripe-width") == 0 ||
2195                            strcmp(token, "stripe_width") == 0) {
2196                         if (!arg) {
2197                                 r_usage++;
2198                                 continue;
2199                         }
2200                         stripe_width = strtoul(arg, &p, 0);
2201                         if (*p) {
2202                                 fprintf(stderr,
2203                                         _("Invalid RAID stripe-width: %s\n"),
2204                                         arg);
2205                                 r_usage++;
2206                                 continue;
2207                         }
2208                         stripe_width_set = 1;
2209                 } else if (strcmp(token, "hash_alg") == 0 ||
2210                            strcmp(token, "hash-alg") == 0) {
2211                         if (!arg) {
2212                                 r_usage++;
2213                                 continue;
2214                         }
2215                         hash_alg = e2p_string2hash(arg);
2216                         if (hash_alg < 0) {
2217                                 fprintf(stderr,
2218                                         _("Invalid hash algorithm: %s\n"),
2219                                         arg);
2220                                 r_usage++;
2221                                 continue;
2222                         }
2223                         sb->s_def_hash_version = hash_alg;
2224                         printf(_("Setting default hash algorithm "
2225                                  "to %s (%d)\n"),
2226                                arg, hash_alg);
2227                         ext2fs_mark_super_dirty(fs);
2228                 } else if (!strcmp(token, "mount_opts")) {
2229                         if (!arg) {
2230                                 r_usage++;
2231                                 continue;
2232                         }
2233                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2234                                 fprintf(stderr,
2235                                         "Extended mount options too long\n");
2236                                 continue;
2237                         }
2238                         ext_mount_opts = strdup(arg);
2239                 } else if (!strcmp(token, "encoding")) {
2240                         if (!arg) {
2241                                 r_usage++;
2242                                 continue;
2243                         }
2244                         if (mount_flags & EXT2_MF_MOUNTED) {
2245                                 fputs(_("The casefold feature may only be enabled when "
2246                                         "the filesystem is unmounted.\n"), stderr);
2247                                 r_usage++;
2248                                 continue;
2249                         }
2250                         if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
2251                                 fprintf(stderr, _("Cannot alter existing encoding\n"));
2252                                 r_usage++;
2253                                 continue;
2254                         }
2255                         encoding = e2p_str2encoding(arg);
2256                         if (encoding < 0) {
2257                                 fprintf(stderr, _("Invalid encoding: %s\n"), arg);
2258                                 r_usage++;
2259                                 continue;
2260                         }
2261                         enabling_casefold = 1;
2262                         sb->s_encoding = encoding;
2263                         printf(_("Setting encoding to '%s'\n"), arg);
2264                         sb->s_encoding_flags =
2265                                 e2p_get_encoding_flags(sb->s_encoding);
2266                 } else if (!strcmp(token, "encoding_flags")) {
2267                         if (!arg) {
2268                                 r_usage++;
2269                                 continue;
2270                         }
2271                         encoding_flags = arg;
2272                 } else
2273                         r_usage++;
2274         }
2275
2276         if (encoding > 0 && !r_usage) {
2277                 sb->s_encoding_flags =
2278                         e2p_get_encoding_flags(sb->s_encoding);
2279
2280                 if (encoding_flags &&
2281                     e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
2282                                            &sb->s_encoding_flags)) {
2283                         fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
2284                                         encoding_flags);
2285                         r_usage++;
2286                 } else if (encoding_flags)
2287                         printf(_("Setting encoding_flags to '%s'\n"),
2288                                  encoding_flags);
2289                 ext2fs_set_feature_casefold(sb);
2290                 ext2fs_mark_super_dirty(fs);
2291         } else if (encoding_flags && !r_usage) {
2292                 fprintf(stderr, _("error: An encoding must be explicitly "
2293                                   "specified when passing encoding-flags\n"));
2294                 r_usage++;
2295         }
2296         if (r_usage) {
2297                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2298                         "Extended options are separated by commas, "
2299                         "and may take an argument which\n"
2300                         "\tis set off by an equals ('=') sign.\n\n"
2301                         "Valid extended options are:\n"
2302                         "\tclear_mmp\n"
2303                         "\thash_alg=<hash algorithm>\n"
2304                         "\tmount_opts=<extended default mount options>\n"
2305                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2306                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2307                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2308                         "\tforce_fsck\n"
2309                         "\ttest_fs\n"
2310                         "\t^test_fs\n"
2311                         "\tencoding=<encoding>\n"
2312                         "\tencoding_flags=<flags>\n"));
2313                 free(buf);
2314                 return 1;
2315         }
2316         free(buf);
2317
2318         return 0;
2319 }
2320
2321 /*
2322  * Fill in the block bitmap bmap with the information regarding the
2323  * blocks to be moved
2324  */
2325 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2326                             ext2fs_block_bitmap bmap)
2327 {
2328         dgrp_t i;
2329         int retval;
2330         ext2_badblocks_list bb_list = 0;
2331         blk64_t j, needed_blocks = 0;
2332         blk64_t start_blk, end_blk;
2333
2334         retval = ext2fs_read_bb_inode(fs, &bb_list);
2335         if (retval)
2336                 return retval;
2337
2338         for (i = 0; i < fs->group_desc_count; i++) {
2339                 start_blk = ext2fs_inode_table_loc(fs, i) +
2340                                         fs->inode_blocks_per_group;
2341
2342                 end_blk = ext2fs_inode_table_loc(fs, i) +
2343                                         new_ino_blks_per_grp;
2344
2345                 for (j = start_blk; j < end_blk; j++) {
2346                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2347                                 /*
2348                                  * IF the block is a bad block we fail
2349                                  */
2350                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2351                                         ext2fs_badblocks_list_free(bb_list);
2352                                         return ENOSPC;
2353                                 }
2354
2355                                 ext2fs_mark_block_bitmap2(bmap, j);
2356                         } else {
2357                                 /*
2358                                  * We are going to use this block for
2359                                  * inode table. So mark them used.
2360                                  */
2361                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2362                         }
2363                 }
2364                 needed_blocks += end_blk - start_blk;
2365         }
2366
2367         ext2fs_badblocks_list_free(bb_list);
2368         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2369                 return ENOSPC;
2370
2371         return 0;
2372 }
2373
2374 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2375 {
2376         dgrp_t group;
2377         group = ext2fs_group_of_blk2(fs, blk);
2378         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2379                 return 1;
2380         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2381                 return 1;
2382         return 0;
2383 }
2384
2385 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2386 {
2387         blk64_t start_blk, end_blk;
2388         start_blk = fs->super->s_first_data_block +
2389                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2390         /*
2391          * We cannot get new block beyond end_blk for for the last block group
2392          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2393          */
2394         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2395         if (blk >= start_blk && blk <= end_blk)
2396                 return 1;
2397         return 0;
2398 }
2399
2400 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2401 {
2402
2403         char *buf;
2404         dgrp_t group = 0;
2405         errcode_t retval;
2406         int meta_data = 0;
2407         blk64_t blk, new_blk, goal;
2408         struct blk_move *bmv;
2409
2410         retval = ext2fs_get_mem(fs->blocksize, &buf);
2411         if (retval)
2412                 return retval;
2413
2414         for (new_blk = blk = fs->super->s_first_data_block;
2415              blk < ext2fs_blocks_count(fs->super); blk++) {
2416                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2417                         continue;
2418
2419                 if (ext2fs_is_meta_block(fs, blk)) {
2420                         /*
2421                          * If the block is mapping a fs meta data block
2422                          * like group desc/block bitmap/inode bitmap. We
2423                          * should find a block in the same group and fix
2424                          * the respective fs metadata pointers. Otherwise
2425                          * fail
2426                          */
2427                         group = ext2fs_group_of_blk2(fs, blk);
2428                         goal = ext2fs_group_first_block2(fs, group);
2429                         meta_data = 1;
2430
2431                 } else {
2432                         goal = new_blk;
2433                 }
2434                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2435                 if (retval)
2436                         goto err_out;
2437
2438                 /* new fs meta data block should be in the same group */
2439                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2440                         retval = ENOSPC;
2441                         goto err_out;
2442                 }
2443
2444                 /* Mark this block as allocated */
2445                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2446
2447                 /* Add it to block move list */
2448                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2449                 if (retval)
2450                         goto err_out;
2451
2452                 bmv->old_loc = blk;
2453                 bmv->new_loc = new_blk;
2454
2455                 list_add(&(bmv->list), &blk_move_list);
2456
2457                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2458                 if (retval)
2459                         goto err_out;
2460
2461                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2462                 if (retval)
2463                         goto err_out;
2464         }
2465
2466 err_out:
2467         ext2fs_free_mem(&buf);
2468         return retval;
2469 }
2470
2471 static blk64_t translate_block(blk64_t blk)
2472 {
2473         struct list_head *entry;
2474         struct blk_move *bmv;
2475
2476         list_for_each(entry, &blk_move_list) {
2477                 bmv = list_entry(entry, struct blk_move, list);
2478                 if (bmv->old_loc == blk)
2479                         return bmv->new_loc;
2480         }
2481
2482         return 0;
2483 }
2484
2485 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2486                          blk64_t *block_nr,
2487                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2488                          blk64_t ref_block EXT2FS_ATTR((unused)),
2489                          int ref_offset EXT2FS_ATTR((unused)),
2490                          void *priv_data)
2491 {
2492         int ret = 0;
2493         blk64_t new_blk;
2494         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2495
2496         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2497                 return 0;
2498         new_blk = translate_block(*block_nr);
2499         if (new_blk) {
2500                 *block_nr = new_blk;
2501                 /*
2502                  * This will force the ext2fs_write_inode in the iterator
2503                  */
2504                 ret |= BLOCK_CHANGED;
2505         }
2506
2507         return ret;
2508 }
2509
2510 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2511 {
2512         errcode_t retval = 0;
2513         ext2_ino_t ino;
2514         blk64_t blk;
2515         char *block_buf = 0;
2516         struct ext2_inode inode;
2517         ext2_inode_scan scan = NULL;
2518
2519         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2520         if (retval)
2521                 return retval;
2522
2523         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2524         if (retval)
2525                 goto err_out;
2526
2527         while (1) {
2528                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2529                 if (retval)
2530                         goto err_out;
2531
2532                 if (!ino)
2533                         break;
2534
2535                 if (inode.i_links_count == 0)
2536                         continue; /* inode not in use */
2537
2538                 /* FIXME!!
2539                  * If we end up modifying the journal inode
2540                  * the sb->s_jnl_blocks will differ. But a
2541                  * subsequent e2fsck fixes that.
2542                  * Do we need to fix this ??
2543                  */
2544
2545                 if (ext2fs_file_acl_block(fs, &inode) &&
2546                     ext2fs_test_block_bitmap2(bmap,
2547                                         ext2fs_file_acl_block(fs, &inode))) {
2548                         blk = translate_block(ext2fs_file_acl_block(fs,
2549                                                                     &inode));
2550                         if (!blk)
2551                                 continue;
2552
2553                         ext2fs_file_acl_block_set(fs, &inode, blk);
2554
2555                         /*
2556                          * Write the inode to disk so that inode table
2557                          * resizing can work
2558                          */
2559                         retval = ext2fs_write_inode(fs, ino, &inode);
2560                         if (retval)
2561                                 goto err_out;
2562                 }
2563
2564                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2565                         continue;
2566
2567                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2568                                                process_block, bmap);
2569                 if (retval)
2570                         goto err_out;
2571
2572         }
2573
2574 err_out:
2575         ext2fs_free_mem(&block_buf);
2576         ext2fs_close_inode_scan(scan);
2577
2578         return retval;
2579 }
2580
2581 /*
2582  * We need to scan for inode and block bitmaps that may need to be
2583  * moved.  This can take place if the filesystem was formatted for
2584  * RAID arrays using the mke2fs's extended option "stride".
2585  */
2586 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2587 {
2588         dgrp_t i;
2589         blk64_t blk, new_blk;
2590
2591         for (i = 0; i < fs->group_desc_count; i++) {
2592                 blk = ext2fs_block_bitmap_loc(fs, i);
2593                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2594                         new_blk = translate_block(blk);
2595                         if (!new_blk)
2596                                 continue;
2597                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2598                 }
2599
2600                 blk = ext2fs_inode_bitmap_loc(fs, i);
2601                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2602                         new_blk = translate_block(blk);
2603                         if (!new_blk)
2604                                 continue;
2605                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2606                 }
2607         }
2608         return 0;
2609 }
2610
2611 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2612 {
2613         dgrp_t i;
2614         blk64_t blk;
2615         errcode_t retval;
2616         int new_ino_blks_per_grp;
2617         unsigned int j;
2618         char *old_itable = NULL, *new_itable = NULL;
2619         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2620         unsigned long old_ino_size;
2621         int old_itable_size, new_itable_size;
2622
2623         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2624         old_ino_size = EXT2_INODE_SIZE(fs->super);
2625
2626         new_ino_blks_per_grp = ext2fs_div_ceil(
2627                                         EXT2_INODES_PER_GROUP(fs->super) *
2628                                         new_ino_size,
2629                                         fs->blocksize);
2630
2631         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2632
2633         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2634         if (retval)
2635                 return retval;
2636
2637         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2638         if (retval)
2639                 goto err_out;
2640
2641         tmp_old_itable = old_itable;
2642         tmp_new_itable = new_itable;
2643
2644         for (i = 0; i < fs->group_desc_count; i++) {
2645                 blk = ext2fs_inode_table_loc(fs, i);
2646                 retval = io_channel_read_blk64(fs->io, blk,
2647                                 fs->inode_blocks_per_group, old_itable);
2648                 if (retval)
2649                         goto err_out;
2650
2651                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2652                         memcpy(new_itable, old_itable, old_ino_size);
2653
2654                         memset(new_itable+old_ino_size, 0,
2655                                         new_ino_size - old_ino_size);
2656
2657                         new_itable += new_ino_size;
2658                         old_itable += old_ino_size;
2659                 }
2660
2661                 /* reset the pointer */
2662                 old_itable = tmp_old_itable;
2663                 new_itable = tmp_new_itable;
2664
2665                 retval = io_channel_write_blk64(fs->io, blk,
2666                                         new_ino_blks_per_grp, new_itable);
2667                 if (retval)
2668                         goto err_out;
2669         }
2670
2671         /* Update the meta data */
2672         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2673         ext2fs_free_inode_cache(fs->icache);
2674         fs->icache = 0;
2675         fs->super->s_inode_size = new_ino_size;
2676
2677 err_out:
2678         if (old_itable)
2679                 ext2fs_free_mem(&old_itable);
2680
2681         if (new_itable)
2682                 ext2fs_free_mem(&new_itable);
2683
2684         return retval;
2685 }
2686
2687
2688 #define list_for_each_safe(pos, pnext, head) \
2689         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2690              pos = pnext, pnext = pos->next)
2691
2692 static void free_blk_move_list(void)
2693 {
2694         struct list_head *entry, *tmp;
2695         struct blk_move *bmv;
2696
2697         list_for_each_safe(entry, tmp, &blk_move_list) {
2698                 bmv = list_entry(entry, struct blk_move, list);
2699                 list_del(entry);
2700                 ext2fs_free_mem(&bmv);
2701         }
2702         return;
2703 }
2704
2705 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2706 {
2707         errcode_t retval;
2708         int new_ino_blks_per_grp;
2709         ext2fs_block_bitmap bmap;
2710
2711         retval = ext2fs_read_inode_bitmap(fs);
2712         if (retval) {
2713                 fputs(_("Failed to read inode bitmap\n"), stderr);
2714                 return retval;
2715         }
2716         retval = ext2fs_read_block_bitmap(fs);
2717         if (retval) {
2718                 fputs(_("Failed to read block bitmap\n"), stderr);
2719                 return retval;
2720         }
2721         INIT_LIST_HEAD(&blk_move_list);
2722
2723
2724         new_ino_blks_per_grp = ext2fs_div_ceil(
2725                                         EXT2_INODES_PER_GROUP(fs->super)*
2726                                         new_size,
2727                                         fs->blocksize);
2728
2729         /* We may change the file system.
2730          * Mark the file system as invalid so that
2731          * the user is prompted to run fsck.
2732          */
2733         fs->super->s_state &= ~EXT2_VALID_FS;
2734
2735         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2736                                                 &bmap);
2737         if (retval) {
2738                 fputs(_("Failed to allocate block bitmap when "
2739                                 "increasing inode size\n"), stderr);
2740                 return retval;
2741         }
2742         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2743         if (retval) {
2744                 fputs(_("Not enough space to increase inode size \n"), stderr);
2745                 goto err_out;
2746         }
2747         retval = move_block(fs, bmap);
2748         if (retval) {
2749                 fputs(_("Failed to relocate blocks during inode resize \n"),
2750                       stderr);
2751                 goto err_out;
2752         }
2753         retval = inode_scan_and_fix(fs, bmap);
2754         if (retval)
2755                 goto err_out_undo;
2756
2757         retval = group_desc_scan_and_fix(fs, bmap);
2758         if (retval)
2759                 goto err_out_undo;
2760
2761         retval = expand_inode_table(fs, new_size);
2762         if (retval)
2763                 goto err_out_undo;
2764
2765         ext2fs_calculate_summary_stats(fs, 1 /* super only */);
2766
2767         fs->super->s_state |= EXT2_VALID_FS;
2768         /* mark super block and block bitmap as dirty */
2769         ext2fs_mark_super_dirty(fs);
2770         ext2fs_mark_bb_dirty(fs);
2771
2772 err_out:
2773         free_blk_move_list();
2774         ext2fs_free_block_bitmap(bmap);
2775
2776         return retval;
2777
2778 err_out_undo:
2779         free_blk_move_list();
2780         ext2fs_free_block_bitmap(bmap);
2781         fputs(_("Error in resizing the inode size.\n"
2782                         "Run e2undo to undo the "
2783                         "file system changes. \n"), stderr);
2784
2785         return retval;
2786 }
2787
2788 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2789 {
2790         errcode_t retval = 0;
2791         const char *tdb_dir;
2792         char *tdb_file = NULL;
2793         char *dev_name, *tmp_name;
2794
2795         /* (re)open a specific undo file */
2796         if (undo_file && undo_file[0] != 0) {
2797                 retval = set_undo_io_backing_manager(*io_ptr);
2798                 if (retval)
2799                         goto err;
2800                 *io_ptr = undo_io_manager;
2801                 retval = set_undo_io_backup_file(undo_file);
2802                 if (retval)
2803                         goto err;
2804                 printf(_("Overwriting existing filesystem; this can be undone "
2805                          "using the command:\n"
2806                          "    e2undo %s %s\n\n"),
2807                          undo_file, name);
2808                 return retval;
2809         }
2810
2811         /*
2812          * Configuration via a conf file would be
2813          * nice
2814          */
2815         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2816         if (!tdb_dir)
2817                 tdb_dir = "/var/lib/e2fsprogs";
2818
2819         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2820             access(tdb_dir, W_OK))
2821                 return 0;
2822
2823         tmp_name = strdup(name);
2824         if (!tmp_name)
2825                 goto errout;
2826         dev_name = basename(tmp_name);
2827         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2828         if (!tdb_file) {
2829                 free(tmp_name);
2830                 goto errout;
2831         }
2832         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2833         free(tmp_name);
2834
2835         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2836                 retval = errno;
2837                 com_err(program_name, retval,
2838                         _("while trying to delete %s"), tdb_file);
2839                 goto errout;
2840         }
2841
2842         retval = set_undo_io_backing_manager(*io_ptr);
2843         if (retval)
2844                 goto errout;
2845         *io_ptr = undo_io_manager;
2846         retval = set_undo_io_backup_file(tdb_file);
2847         if (retval)
2848                 goto errout;
2849         printf(_("Overwriting existing filesystem; this can be undone "
2850                  "using the command:\n"
2851                  "    e2undo %s %s\n\n"),
2852                  tdb_file, name);
2853
2854         free(tdb_file);
2855         return 0;
2856 errout:
2857         free(tdb_file);
2858 err:
2859         com_err("tune2fs", retval, "while trying to setup undo file\n");
2860         return retval;
2861 }
2862
2863 static int
2864 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2865 {
2866         int retval, nr_users, start;
2867         journal_superblock_t *jsb;
2868         ext2_filsys jfs;
2869         __u8 *j_uuid;
2870         char *journal_path;
2871         char uuid[UUID_STR_SIZE];
2872         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2873
2874         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2875                 return 0;
2876
2877         uuid_unparse(sb->s_journal_uuid, uuid);
2878         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2879         if (!journal_path)
2880                 return 0;
2881
2882         retval = ext2fs_open2(journal_path, io_options,
2883                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2884                               0, 0, unix_io_manager, &jfs);
2885         if (retval) {
2886                 com_err(program_name, retval,
2887                         _("while trying to open %s"),
2888                         journal_path);
2889                 return retval;
2890         }
2891
2892         retval = get_journal_sb(jfs, buf);
2893         if (retval != 0) {
2894                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2895                         fprintf(stderr, _("%s is not a journal device.\n"),
2896                                 journal_path);
2897                 return retval;
2898         }
2899
2900         jsb = (journal_superblock_t *) buf;
2901         /* Find the filesystem UUID */
2902         nr_users = ntohl(jsb->s_nr_users);
2903         if (nr_users > JBD2_USERS_MAX) {
2904                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2905                                  "is too high (%d).\n"), nr_users);
2906                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2907         }
2908
2909         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2910         if (j_uuid == NULL) {
2911                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2912                       stderr);
2913                 return EXT2_ET_LOAD_EXT_JOURNAL;
2914         }
2915
2916         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2917
2918         start = ext2fs_journal_sb_start(jfs->blocksize);
2919         /* Write back the journal superblock */
2920         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2921         if (retval != 0) {
2922                 com_err(program_name, retval,
2923                         "while writing journal superblock.");
2924                 return retval;
2925         }
2926
2927         ext2fs_close(jfs);
2928
2929         return 0;
2930 }
2931
2932 #ifndef BUILD_AS_LIB
2933 int main(int argc, char **argv)
2934 #else
2935 int tune2fs_main(int argc, char **argv)
2936 #endif  /* BUILD_AS_LIB */
2937 {
2938         errcode_t retval;
2939         ext2_filsys fs;
2940         struct ext2_super_block *sb;
2941         io_manager io_ptr, io_ptr_orig = NULL;
2942         int rc = 0;
2943         char default_undo_file[1] = { 0 };
2944
2945 #ifdef ENABLE_NLS
2946         setlocale(LC_MESSAGES, "");
2947         setlocale(LC_CTYPE, "");
2948         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2949         textdomain(NLS_CAT_NAME);
2950         set_com_err_gettext(gettext);
2951 #endif
2952         if (argc && *argv)
2953                 program_name = *argv;
2954         add_error_table(&et_ext2_error_table);
2955
2956 #ifdef CONFIG_BUILD_FINDFS
2957         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2958                 do_findfs(argc, argv);
2959 #endif
2960         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2961                 parse_e2label_options(argc, argv);
2962         else
2963                 parse_tune2fs_options(argc, argv);
2964
2965 #ifdef CONFIG_TESTIO_DEBUG
2966         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2967                 io_ptr = test_io_manager;
2968                 test_io_backing_manager = unix_io_manager;
2969         } else
2970 #endif
2971                 io_ptr = unix_io_manager;
2972
2973 retry_open:
2974         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2975                 open_flag |= EXT2_FLAG_SKIP_MMP;
2976
2977         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
2978                 EXT2_FLAG_JOURNAL_DEV_OK;
2979
2980         /* keep the filesystem struct around to dump MMP data */
2981         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2982
2983         retval = ext2fs_open2(device_name, io_options, open_flag,
2984                               0, 0, io_ptr, &fs);
2985         if (retval) {
2986                 com_err(program_name, retval,
2987                         _("while trying to open %s"),
2988                         device_name);
2989                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2990                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2991                         dump_mmp_msg(fs->mmp_buf,
2992                                      _("If you are sure the filesystem "
2993                                        "is not in use on any node, run:\n"
2994                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2995                 else if (retval == EXT2_ET_MMP_FAILED)
2996                         dump_mmp_msg(fs->mmp_buf, NULL);
2997                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2998                         fprintf(stderr,
2999                                 _("MMP block magic is bad. Try to fix it by "
3000                                   "running:\n'e2fsck -f %s'\n"), device_name);
3001                 else if (retval == EXT2_ET_BAD_MAGIC)
3002                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
3003                 else if (retval != EXT2_ET_MMP_FAILED)
3004                         fprintf(stderr, "%s",
3005                              _("Couldn't find valid filesystem superblock.\n"));
3006
3007                 ext2fs_free(fs);
3008                 exit(1);
3009         }
3010         if (ext2fs_has_feature_journal_dev(fs->super)) {
3011                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
3012                 ext2fs_free(fs);
3013                 exit(1);
3014         }
3015         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
3016
3017         if (I_flag) {
3018                 /*
3019                  * Check the inode size is right so we can issue an
3020                  * error message and bail before setting up the tdb
3021                  * file.
3022                  */
3023                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
3024                         fprintf(stderr, _("The inode size is already %lu\n"),
3025                                 new_inode_size);
3026                         rc = 1;
3027                         goto closefs;
3028                 }
3029                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3030                         fprintf(stderr, "%s",
3031                                 _("Shrinking inode size is not supported\n"));
3032                         rc = 1;
3033                         goto closefs;
3034                 }
3035                 if (new_inode_size > fs->blocksize) {
3036                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3037                                 new_inode_size, fs->blocksize);
3038                         rc = 1;
3039                         goto closefs;
3040                 }
3041                 rc = check_fsck_needed(fs,
3042                         _("Resizing inodes could take some time."));
3043                 if (rc)
3044                         goto closefs;
3045                 /*
3046                  * If inode resize is requested use the
3047                  * Undo I/O manager
3048                  */
3049                 undo_file = default_undo_file;
3050         }
3051
3052         /* Set up an undo file */
3053         if (undo_file && io_ptr_orig == NULL) {
3054                 io_ptr_orig = io_ptr;
3055                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3056                 if (retval) {
3057                         rc = 1;
3058                         goto closefs;
3059                 }
3060                 if (io_ptr != io_ptr_orig) {
3061                         ext2fs_close_free(&fs);
3062                         goto retry_open;
3063                 }
3064         }
3065
3066         sb = fs->super;
3067         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3068
3069         if (print_label) {
3070                 /* For e2label emulation */
3071                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3072                 remove_error_table(&et_ext2_error_table);
3073                 goto closefs;
3074         }
3075
3076         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3077         if (retval) {
3078                 com_err("ext2fs_check_if_mount", retval,
3079                         _("while determining whether %s is mounted."),
3080                         device_name);
3081                 rc = 1;
3082                 goto closefs;
3083         }
3084
3085 #ifdef NO_RECOVERY
3086         /* Warn if file system needs recovery and it is opened for writing. */
3087         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3088             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3089             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3090                 fprintf(stderr,
3091 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3092   "\te2fsck -E journal_only %s\n\n"
3093   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3094   "by journal recovery.\n"), device_name);
3095         }
3096 #else
3097         /* Recover the journal if possible. */
3098         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3099             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3100                 printf(_("Recovering journal.\n"));
3101                 retval = ext2fs_run_ext3_journal(&fs);
3102                 if (retval) {
3103                         com_err("tune2fs", retval,
3104                                 "while recovering journal.\n");
3105                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3106                         if (fs)
3107                                 ext2fs_close_free(&fs);
3108                         rc = 1;
3109                         goto closefs;
3110                 }
3111                 sb = fs->super;
3112         }
3113 #endif
3114
3115         /* Normally we only need to write out the superblock */
3116         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3117
3118         if (c_flag) {
3119                 if (max_mount_count == 65536)
3120                         max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
3121                                 (random() % EXT2_DFL_MAX_MNT_COUNT);
3122                 sb->s_max_mnt_count = max_mount_count;
3123                 ext2fs_mark_super_dirty(fs);
3124                 printf(_("Setting maximal mount count to %d\n"),
3125                        max_mount_count);
3126         }
3127         if (C_flag) {
3128                 sb->s_mnt_count = mount_count;
3129                 ext2fs_mark_super_dirty(fs);
3130                 printf(_("Setting current mount count to %d\n"), mount_count);
3131         }
3132         if (e_flag) {
3133                 sb->s_errors = errors;
3134                 ext2fs_mark_super_dirty(fs);
3135                 printf(_("Setting error behavior to %d\n"), errors);
3136         }
3137         if (g_flag) {
3138                 sb->s_def_resgid = resgid;
3139                 ext2fs_mark_super_dirty(fs);
3140                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3141         }
3142         if (i_flag) {
3143                 if ((unsigned long long)interval >= (1ULL << 32)) {
3144                         com_err(program_name, 0,
3145                                 _("interval between checks is too big (%lu)"),
3146                                 interval);
3147                         rc = 1;
3148                         goto closefs;
3149                 }
3150                 sb->s_checkinterval = interval;
3151                 ext2fs_mark_super_dirty(fs);
3152                 printf(_("Setting interval between checks to %lu seconds\n"),
3153                        interval);
3154         }
3155         if (m_flag) {
3156                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3157                                           ext2fs_blocks_count(sb) / 100.0);
3158                 ext2fs_mark_super_dirty(fs);
3159                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3160                         reserved_ratio,
3161                         (unsigned long long) ext2fs_r_blocks_count(sb));
3162         }
3163         if (r_flag) {
3164                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3165                         com_err(program_name, 0,
3166                                 _("reserved blocks count is too big (%llu)"),
3167                                 (unsigned long long) reserved_blocks);
3168                         rc = 1;
3169                         goto closefs;
3170                 }
3171                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3172                 ext2fs_mark_super_dirty(fs);
3173                 printf(_("Setting reserved blocks count to %llu\n"),
3174                        (unsigned long long) reserved_blocks);
3175         }
3176         if (s_flag == 1) {
3177                 if (ext2fs_has_feature_sparse_super(sb)) {
3178                         fputs(_("\nThe filesystem already has sparse "
3179                                 "superblocks.\n"), stderr);
3180                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3181                         fputs(_("\nSetting the sparse superblock flag not "
3182                                 "supported\nfor filesystems with "
3183                                 "the meta_bg feature enabled.\n"),
3184                                 stderr);
3185                         rc = 1;
3186                         goto closefs;
3187                 } else {
3188                         ext2fs_set_feature_sparse_super(sb);
3189                         sb->s_state &= ~EXT2_VALID_FS;
3190                         ext2fs_mark_super_dirty(fs);
3191                         printf(_("\nSparse superblock flag set.  %s"),
3192                                _(please_fsck));
3193                 }
3194         }
3195         if (s_flag == 0) {
3196                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3197                       stderr);
3198                 rc = 1;
3199                 goto closefs;
3200         }
3201         if (T_flag) {
3202                 sb->s_lastcheck = last_check_time;
3203                 ext2fs_mark_super_dirty(fs);
3204                 printf(_("Setting time filesystem last checked to %s\n"),
3205                        ctime(&last_check_time));
3206         }
3207         if (u_flag) {
3208                 sb->s_def_resuid = resuid;
3209                 ext2fs_mark_super_dirty(fs);
3210                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3211         }
3212         if (L_flag) {
3213                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3214                         fputs(_("Warning: label too long, truncating.\n"),
3215                               stderr);
3216                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3217                 strncpy((char *)sb->s_volume_name, new_label,
3218                         sizeof(sb->s_volume_name));
3219                 ext2fs_mark_super_dirty(fs);
3220         }
3221         if (M_flag) {
3222                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3223                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3224                         sizeof(sb->s_last_mounted));
3225                 ext2fs_mark_super_dirty(fs);
3226         }
3227         if (mntopts_cmd) {
3228                 rc = update_mntopts(fs, mntopts_cmd);
3229                 if (rc)
3230                         goto closefs;
3231         }
3232         if (features_cmd) {
3233                 rc = update_feature_set(fs, features_cmd);
3234                 if (rc)
3235                         goto closefs;
3236         }
3237         if (extended_cmd) {
3238                 rc = parse_extended_opts(fs, extended_cmd);
3239                 if (rc)
3240                         goto closefs;
3241                 if (clear_mmp && !f_flag) {
3242                         fputs(_("Error in using clear_mmp. "
3243                                 "It must be used with -f\n"),
3244                               stderr);
3245                         goto closefs;
3246                 }
3247         }
3248         if (clear_mmp) {
3249                 rc = ext2fs_mmp_clear(fs);
3250                 goto closefs;
3251         }
3252         if (journal_size || journal_device) {
3253                 rc = add_journal(fs);
3254                 if (rc)
3255                         goto closefs;
3256         }
3257
3258         if (Q_flag) {
3259                 if (mount_flags & EXT2_MF_MOUNTED) {
3260                         fputs(_("The quota feature may only be changed when "
3261                                 "the filesystem is unmounted.\n"), stderr);
3262                         rc = 1;
3263                         goto closefs;
3264                 }
3265                 rc = handle_quota_options(fs);
3266                 if (rc)
3267                         goto closefs;
3268         }
3269
3270         if (U_flag) {
3271                 int set_csum = 0;
3272                 dgrp_t i;
3273                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3274                 __u8 old_uuid[UUID_SIZE];
3275
3276                 if (ext2fs_has_feature_stable_inodes(fs->super)) {
3277                         fputs(_("Cannot change the UUID of this filesystem "
3278                                 "because it has the stable_inodes feature "
3279                                 "flag.\n"), stderr);
3280                         exit(1);
3281                 }
3282
3283                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3284                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3285                      ext2fs_has_feature_ea_inode(fs->super))) {
3286                         rc = check_fsck_needed(fs,
3287                                 _("Setting the UUID on this "
3288                                   "filesystem could take some time."));
3289                         if (rc)
3290                                 goto closefs;
3291                         rewrite_checksums = REWRITE_ALL;
3292                 }
3293
3294                 if (ext2fs_has_group_desc_csum(fs)) {
3295                         /*
3296                          * Changing the UUID on a metadata_csum FS requires
3297                          * rewriting all metadata, which can race with a
3298                          * mounted fs.  Don't allow that unless we're saving
3299                          * the checksum seed.
3300                          */
3301                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3302                             !ext2fs_has_feature_csum_seed(fs->super) &&
3303                             ext2fs_has_feature_metadata_csum(fs->super)) {
3304                                 fputs(_("The UUID may only be "
3305                                         "changed when the filesystem is "
3306                                         "unmounted.\n"), stderr);
3307                                 fputs(_("If you only use kernels newer than "
3308                                         "v4.4, run 'tune2fs -O "
3309                                         "metadata_csum_seed' and re-run this "
3310                                         "command.\n"), stderr);
3311                                 try_confirm_csum_seed_support();
3312                                 rc = 1;
3313                                 goto closefs;
3314                         }
3315
3316                         /*
3317                          * Determine if the block group checksums are
3318                          * correct so we know whether or not to set
3319                          * them later on.
3320                          */
3321                         for (i = 0; i < fs->group_desc_count; i++)
3322                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3323                                         break;
3324                         if (i >= fs->group_desc_count)
3325                                 set_csum = 1;
3326                 }
3327
3328                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3329                 if ((strcasecmp(new_UUID, "null") == 0) ||
3330                     (strcasecmp(new_UUID, "clear") == 0)) {
3331                         uuid_clear(sb->s_uuid);
3332                 } else if (strcasecmp(new_UUID, "time") == 0) {
3333                         uuid_generate_time(sb->s_uuid);
3334                 } else if (strcasecmp(new_UUID, "random") == 0) {
3335                         uuid_generate(sb->s_uuid);
3336                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3337                         com_err(program_name, 0, "%s",
3338                                 _("Invalid UUID format\n"));
3339                         rc = 1;
3340                         goto closefs;
3341                 }
3342                 ext2fs_init_csum_seed(fs);
3343                 if (set_csum) {
3344                         for (i = 0; i < fs->group_desc_count; i++)
3345                                 ext2fs_group_desc_csum_set(fs, i);
3346                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3347                 }
3348
3349                 /* If this is a journal dev, we need to copy UUID into jsb */
3350                 if (!(rc = get_journal_sb(fs, buf))) {
3351                         journal_superblock_t *jsb;
3352
3353                         jsb = (journal_superblock_t *) buf;
3354                         fputs(_("Need to update journal superblock.\n"), stdout);
3355                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3356
3357                         /* Writeback the journal superblock */
3358                         if ((rc = io_channel_write_blk64(fs->io,
3359                                 ext2fs_journal_sb_start(fs->blocksize),
3360                                         -SUPERBLOCK_SIZE, buf)))
3361                                 goto closefs;
3362                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3363                         goto closefs;
3364                 else {
3365                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3366
3367                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3368                                 goto closefs;
3369                 }
3370
3371                 ext2fs_mark_super_dirty(fs);
3372         }
3373
3374         if (I_flag) {
3375                 if (mount_flags & EXT2_MF_MOUNTED) {
3376                         fputs(_("The inode size may only be "
3377                                 "changed when the filesystem is "
3378                                 "unmounted.\n"), stderr);
3379                         rc = 1;
3380                         goto closefs;
3381                 }
3382                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3383                         fputs(_("Changing the inode size not supported for "
3384                                 "filesystems with the flex_bg\n"
3385                                 "feature enabled.\n"),
3386                               stderr);
3387                         rc = 1;
3388                         goto closefs;
3389                 }
3390                 /*
3391                  * We want to update group descriptor also
3392                  * with the new free inode count
3393                  */
3394                 if (rewrite_checksums)
3395                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3396                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3397                 retval = resize_inode(fs, new_inode_size);
3398                 if (rewrite_checksums)
3399                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3400                 if (retval == 0) {
3401                         printf(_("Setting inode size %lu\n"),
3402                                                         new_inode_size);
3403                         rewrite_checksums = REWRITE_ALL;
3404                 } else {
3405                         printf("%s", _("Failed to change inode size\n"));
3406                         rc = 1;
3407                         goto closefs;
3408                 }
3409         }
3410
3411         if (rewrite_checksums)
3412                 rewrite_metadata_checksums(fs, rewrite_checksums);
3413
3414         if (l_flag)
3415                 list_super(sb);
3416         if (stride_set) {
3417                 sb->s_raid_stride = stride;
3418                 ext2fs_mark_super_dirty(fs);
3419                 printf(_("Setting stride size to %d\n"), stride);
3420         }
3421         if (stripe_width_set) {
3422                 sb->s_raid_stripe_width = stripe_width;
3423                 ext2fs_mark_super_dirty(fs);
3424                 printf(_("Setting stripe width to %d\n"), stripe_width);
3425         }
3426         if (ext_mount_opts) {
3427                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3428                         sizeof(fs->super->s_mount_opts));
3429                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3430                 ext2fs_mark_super_dirty(fs);
3431                 printf(_("Setting extended default mount options to '%s'\n"),
3432                        ext_mount_opts);
3433                 free(ext_mount_opts);
3434         }
3435
3436         free(device_name);
3437         remove_error_table(&et_ext2_error_table);
3438
3439 closefs:
3440         if (rc) {
3441                 ext2fs_mmp_stop(fs);
3442 #ifndef BUILD_AS_LIB
3443                 exit(1);
3444 #endif
3445         }
3446
3447         if (feature_64bit)
3448                 convert_64bit(fs, feature_64bit);
3449         return (ext2fs_close_free(&fs) ? 1 : 0);
3450 }