misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104
 105 int journal_size, journal_flags;
 106 char *journal_device;
 107 static blk64_t journal_location = ~0LL;
 108
 109 static struct list_head blk_move_list;
 110
 111 struct blk_move {
 112         struct list_head list;
 113         blk64_t old_loc;
 114         blk64_t new_loc;
 115 };
 116
 117 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 118
 119 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 120
 121 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 122 static const char *please_dir_fsck =
 123                 N_("Please run e2fsck -fD on the filesystem.\n");
 124
 125 #ifdef CONFIG_BUILD_FINDFS
 126 void do_findfs(int argc, char **argv);
 127 #endif
 128
 129 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 130 int journal_enable_debug = -1;
 131 #endif
 132
 133 static void usage(void)
 134 {
 135         fprintf(stderr,
 136                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 137                   "[-g group]\n"
 138                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 139                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 140                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 141                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 142                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 143                   "\t[-E extended-option[,...]] [-T last_check_time] "
 144                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 145                 program_name);
 146         exit(1);
 147 }
 148
 149 static __u32 ok_features[3] = {
 150         /* Compat */
 151         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 152                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 153                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 154                 EXT4_FEATURE_COMPAT_STABLE_INODES,
 155         /* Incompat */
 156         EXT2_FEATURE_INCOMPAT_FILETYPE |
 157                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 158                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 159                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 160                 EXT4_FEATURE_INCOMPAT_MMP |
 161                 EXT4_FEATURE_INCOMPAT_64BIT |
 162                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 163                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 164                 EXT4_FEATURE_INCOMPAT_LARGEDIR,
 165         /* R/O compat */
 166         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 167                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 168                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 169                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 170                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 171                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 172                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 173                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 174                 EXT4_FEATURE_RO_COMPAT_READONLY |
 175                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 176                 EXT4_FEATURE_RO_COMPAT_VERITY
 177 };
 178
 179 static __u32 clear_ok_features[3] = {
 180         /* Compat */
 181         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 182                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 183                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 184                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 185                 EXT4_FEATURE_COMPAT_STABLE_INODES,
 186         /* Incompat */
 187         EXT2_FEATURE_INCOMPAT_FILETYPE |
 188                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 189                 EXT4_FEATURE_INCOMPAT_MMP |
 190                 EXT4_FEATURE_INCOMPAT_64BIT |
 191                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 192         /* R/O compat */
 193         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 194                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 195                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 196                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 197                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 198                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 199                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 200                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 201                 EXT4_FEATURE_RO_COMPAT_READONLY
 202 };
 203
 204 /**
 205  * Try to get journal super block if any
 206  */
 207 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 208 {
 209         int retval;
 210         journal_superblock_t *jsb;
 211
 212         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 213                 return EXT2_ET_UNSUPP_FEATURE;
 214         }
 215
 216         /* Get the journal superblock */
 217         if ((retval = io_channel_read_blk64(jfs->io,
 218             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 219                 com_err(program_name, retval, "%s",
 220                 _("while reading journal superblock"));
 221                 return retval;
 222         }
 223
 224         jsb = (journal_superblock_t *) buf;
 225         if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
 226             (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
 227                 fputs(_("Journal superblock not found!\n"), stderr);
 228                 return EXT2_ET_BAD_MAGIC;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
 235                           int nr_users)
 236 {
 237         int i;
 238         for (i = 0; i < nr_users; i++) {
 239                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 240                         return &s_users[i * UUID_SIZE];
 241         }
 242
 243         return NULL;
 244 }
 245
 246 /*
 247  * Remove an external journal from the filesystem
 248  */
 249 static int remove_journal_device(ext2_filsys fs)
 250 {
 251         char            *journal_path;
 252         ext2_filsys     jfs;
 253         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 254         journal_superblock_t    *jsb;
 255         int             i, nr_users;
 256         errcode_t       retval;
 257         int             commit_remove_journal = 0;
 258         io_manager      io_ptr;
 259
 260         if (f_flag)
 261                 commit_remove_journal = 1; /* force removal even if error */
 262
 263         uuid_unparse(fs->super->s_journal_uuid, buf);
 264         journal_path = blkid_get_devname(NULL, "UUID", buf);
 265
 266         if (!journal_path) {
 267                 journal_path =
 268                         ext2fs_find_block_device(fs->super->s_journal_dev);
 269                 if (!journal_path)
 270                         goto no_valid_journal;
 271         }
 272
 273 #ifdef CONFIG_TESTIO_DEBUG
 274         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 275                 io_ptr = test_io_manager;
 276                 test_io_backing_manager = unix_io_manager;
 277         } else
 278 #endif
 279                 io_ptr = unix_io_manager;
 280         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 281                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 282                              fs->blocksize, io_ptr, &jfs);
 283         if (retval) {
 284                 com_err(program_name, retval, "%s",
 285                         _("while trying to open external journal"));
 286                 goto no_valid_journal;
 287         }
 288
 289         if ((retval = get_journal_sb(jfs, buf))) {
 290                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 291                         fprintf(stderr, _("%s is not a journal device.\n"),
 292                                 journal_path);
 293                 goto no_valid_journal;
 294         }
 295
 296         jsb = (journal_superblock_t *) buf;
 297         /* Find the filesystem UUID */
 298         nr_users = ntohl(jsb->s_nr_users);
 299         if (nr_users > JBD2_USERS_MAX) {
 300                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 301                                  "is too high (%d).\n"), nr_users);
 302                 commit_remove_journal = 1;
 303                 goto no_valid_journal;
 304         }
 305
 306         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 307                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 308                       stderr);
 309                 commit_remove_journal = 1;
 310                 goto no_valid_journal;
 311         }
 312         nr_users--;
 313         for (i = 0; i < nr_users; i++)
 314                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 315         jsb->s_nr_users = htonl(nr_users);
 316
 317         /* Write back the journal superblock */
 318         retval = io_channel_write_blk64(jfs->io,
 319                                         ext2fs_journal_sb_start(fs->blocksize),
 320                                         -SUPERBLOCK_SIZE, buf);
 321         if (retval) {
 322                 com_err(program_name, retval,
 323                         "while writing journal superblock.");
 324                 goto no_valid_journal;
 325         }
 326
 327         commit_remove_journal = 1;
 328
 329 no_valid_journal:
 330         if (commit_remove_journal == 0) {
 331                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 332                         "Use -f option to remove missing journal device.\n"),
 333                       stderr);
 334                 return 1;
 335         }
 336         fs->super->s_journal_dev = 0;
 337         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 338         uuid_clear(fs->super->s_journal_uuid);
 339         ext2fs_mark_super_dirty(fs);
 340         fputs(_("Journal removed\n"), stdout);
 341         free(journal_path);
 342
 343         return 0;
 344 }
 345
 346 /* Helper function for remove_journal_inode */
 347 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 348                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 349                                blk64_t ref_block EXT2FS_ATTR((unused)),
 350                                int ref_offset EXT2FS_ATTR((unused)),
 351                                void *private EXT2FS_ATTR((unused)))
 352 {
 353         blk64_t block;
 354         int     group;
 355
 356         block = *blocknr;
 357         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 358         group = ext2fs_group_of_blk2(fs, block);
 359         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 360         ext2fs_group_desc_csum_set(fs, group);
 361         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 362         return 0;
 363 }
 364
 365 /*
 366  * Remove the journal inode from the filesystem
 367  */
 368 static errcode_t remove_journal_inode(ext2_filsys fs)
 369 {
 370         struct ext2_inode       inode;
 371         errcode_t               retval;
 372         ext2_ino_t              ino = fs->super->s_journal_inum;
 373
 374         retval = ext2fs_read_inode(fs, ino,  &inode);
 375         if (retval) {
 376                 com_err(program_name, retval, "%s",
 377                         _("while reading journal inode"));
 378                 return retval;
 379         }
 380         if (ino == EXT2_JOURNAL_INO) {
 381                 retval = ext2fs_read_bitmaps(fs);
 382                 if (retval) {
 383                         com_err(program_name, retval, "%s",
 384                                 _("while reading bitmaps"));
 385                         return retval;
 386                 }
 387                 retval = ext2fs_block_iterate3(fs, ino,
 388                                                BLOCK_FLAG_READ_ONLY, NULL,
 389                                                release_blocks_proc, NULL);
 390                 if (retval) {
 391                         com_err(program_name, retval, "%s",
 392                                 _("while clearing journal inode"));
 393                         return retval;
 394                 }
 395                 memset(&inode, 0, sizeof(inode));
 396                 ext2fs_mark_bb_dirty(fs);
 397                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 398         } else
 399                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 400         retval = ext2fs_write_inode(fs, ino, &inode);
 401         if (retval) {
 402                 com_err(program_name, retval, "%s",
 403                         _("while writing journal inode"));
 404                 return retval;
 405         }
 406         fs->super->s_journal_inum = 0;
 407         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 408         ext2fs_mark_super_dirty(fs);
 409
 410         return 0;
 411 }
 412
 413 /*
 414  * Update the default mount options
 415  */
 416 static int update_mntopts(ext2_filsys fs, char *mntopts)
 417 {
 418         struct ext2_super_block *sb = fs->super;
 419
 420         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 421                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 422                         mntopts);
 423                 return 1;
 424         }
 425         ext2fs_mark_super_dirty(fs);
 426
 427         return 0;
 428 }
 429
 430 static void check_fsck_needed(ext2_filsys fs, const char *prompt)
 431 {
 432         /* Refuse to modify anything but a freshly checked valid filesystem. */
 433         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 434             (fs->super->s_state & EXT2_ERROR_FS) ||
 435             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 436                 puts(_(fsck_explain));
 437                 puts(_(please_fsck));
 438                 if (mount_flags & EXT2_MF_READONLY)
 439                         printf("%s", _("(and reboot afterwards!)\n"));
 440                 exit(1);
 441         }
 442
 443         /* Give the admin a few seconds to bail out of a dangerous op. */
 444         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 445                 return;
 446
 447         puts(prompt);
 448         proceed_question(5);
 449 }
 450
 451 static void request_dir_fsck_afterwards(ext2_filsys fs)
 452 {
 453         static int requested;
 454
 455         if (requested++)
 456                 return;
 457         fsck_requested++;
 458         fs->super->s_state &= ~EXT2_VALID_FS;
 459         puts(_(fsck_explain));
 460         puts(_(please_dir_fsck));
 461         if (mount_flags & EXT2_MF_READONLY)
 462                 printf("%s", _("(and reboot afterwards!)\n"));
 463 }
 464
 465 static void request_fsck_afterwards(ext2_filsys fs)
 466 {
 467         static int requested = 0;
 468
 469         if (requested++)
 470                 return;
 471         fsck_requested++;
 472         fs->super->s_state &= ~EXT2_VALID_FS;
 473         printf("\n%s\n", _(please_fsck));
 474         if (mount_flags & EXT2_MF_READONLY)
 475                 printf("%s", _("(and reboot afterwards!)\n"));
 476 }
 477
 478 static void convert_64bit(ext2_filsys fs, int direction)
 479 {
 480         /*
 481          * Is resize2fs going to demand a fsck run? Might as well tell the
 482          * user now.
 483          */
 484         if (!fsck_requested &&
 485             ((fs->super->s_state & EXT2_ERROR_FS) ||
 486              !(fs->super->s_state & EXT2_VALID_FS) ||
 487              fs->super->s_lastcheck < fs->super->s_mtime))
 488                 request_fsck_afterwards(fs);
 489         if (fsck_requested)
 490                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 491                         direction > 0 ? "-b" : "-s", fs->device_name);
 492         else
 493                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 494                         direction > 0 ? "-b" : "-s", fs->device_name);
 495
 496         if (undo_file)
 497                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 498         if (direction > 0)
 499                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 500         else
 501                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 502 }
 503
 504 /*
 505  * Rewrite directory blocks with checksums
 506  */
 507 struct rewrite_dir_context {
 508         char *buf;
 509         errcode_t errcode;
 510         ext2_ino_t dir;
 511         int is_htree:1;
 512         int clear_htree:1;
 513 };
 514
 515 static int rewrite_dir_block(ext2_filsys fs,
 516                              blk64_t    *blocknr,
 517                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 518                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 519                              int        ref_offset EXT2FS_ATTR((unused)),
 520                              void       *priv_data)
 521 {
 522         struct ext2_dx_countlimit *dcl = NULL;
 523         struct rewrite_dir_context *ctx = priv_data;
 524         int dcl_offset, changed = 0;
 525
 526         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 527                                               ctx->dir);
 528         if (ctx->errcode)
 529                 return BLOCK_ABORT;
 530
 531         /*
 532          * if htree node... Note that if we are clearing htree structures from
 533          * the directory, we treat the htree internal block as an ordinary leaf.
 534          * The code below will do the right thing and make space for checksum
 535          * there.
 536          */
 537         if (ctx->is_htree && !ctx->clear_htree)
 538                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 539                                          &dcl, &dcl_offset);
 540         if (dcl) {
 541                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 542                         /* Ensure limit is the max size */
 543                         int max_entries = (fs->blocksize - dcl_offset) /
 544                                           sizeof(struct ext2_dx_entry);
 545                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 546                                 changed = 1;
 547                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 548                         }
 549                 } else {
 550                         /* If htree block is full then rebuild the dir */
 551                         if (ext2fs_le16_to_cpu(dcl->count) ==
 552                             ext2fs_le16_to_cpu(dcl->limit)) {
 553                                 request_dir_fsck_afterwards(fs);
 554                                 return 0;
 555                         }
 556                         /*
 557                          * Ensure dcl->limit is small enough to leave room for
 558                          * the checksum tail.
 559                          */
 560                         int max_entries = (fs->blocksize - (dcl_offset +
 561                                                 sizeof(struct ext2_dx_tail))) /
 562                                           sizeof(struct ext2_dx_entry);
 563                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 564                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 565                         /* Always rewrite checksum */
 566                         changed = 1;
 567                 }
 568         } else {
 569                 unsigned int rec_len, name_size;
 570                 char *top = ctx->buf + fs->blocksize;
 571                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 572                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 573
 574                 /* Find last and penultimate dirent */
 575                 while ((char *)de < top) {
 576                         penultimate_de = last_de;
 577                         last_de = de;
 578                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 579                         if (!ctx->errcode && !rec_len)
 580                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 581                         if (ctx->errcode)
 582                                 return BLOCK_ABORT;
 583                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 584                 }
 585                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 586                 if (ctx->errcode)
 587                         return BLOCK_ABORT;
 588                 name_size = ext2fs_dirent_name_len(last_de);
 589
 590                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 591                         if (!penultimate_de)
 592                                 return 0;
 593                         if (last_de->inode ||
 594                             name_size ||
 595                             rec_len != sizeof(struct ext2_dir_entry_tail))
 596                                 return 0;
 597                         /*
 598                          * The last dirent is unused and the right length to
 599                          * have stored a checksum.  Erase it.
 600                          */
 601                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 602                                                           &rec_len);
 603                         if (!rec_len)
 604                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 605                         if (ctx->errcode)
 606                                 return BLOCK_ABORT;
 607                         ext2fs_set_rec_len(fs, rec_len +
 608                                         sizeof(struct ext2_dir_entry_tail),
 609                                         penultimate_de);
 610                         changed = 1;
 611                 } else {
 612                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 613                         struct ext2_dir_entry_tail *t;
 614
 615                         /*
 616                          * If the last dirent looks like the tail, just update
 617                          * the checksum.
 618                          */
 619                         if (!last_de->inode &&
 620                             rec_len == csum_size) {
 621                                 t = (struct ext2_dir_entry_tail *)last_de;
 622                                 t->det_reserved_name_len =
 623                                                 EXT2_DIR_NAME_LEN_CSUM;
 624                                 changed = 1;
 625                                 goto out;
 626                         }
 627                         if (name_size & 3)
 628                                 name_size = (name_size & ~3) + 4;
 629                         /* If there's not enough space for the tail, e2fsck */
 630                         if (rec_len <= (8 + name_size + csum_size)) {
 631                                 request_dir_fsck_afterwards(fs);
 632                                 return 0;
 633                         }
 634                         /* Shorten that last de and insert the tail */
 635                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 636                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 637                         ext2fs_initialize_dirent_tail(fs, t);
 638
 639                         /* Always update checksum */
 640                         changed = 1;
 641                 }
 642         }
 643
 644 out:
 645         if (!changed)
 646                 return 0;
 647
 648         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 649                                                0, ctx->dir);
 650         if (ctx->errcode)
 651                 return BLOCK_ABORT;
 652
 653         return 0;
 654 }
 655
 656 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 657                                    struct ext2_inode *inode)
 658 {
 659         errcode_t       retval;
 660         struct rewrite_dir_context ctx;
 661
 662         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 663         if (retval)
 664                 return retval;
 665
 666         ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
 667         ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
 668         ctx.dir = dir;
 669         ctx.errcode = 0;
 670         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 671                                                 BLOCK_FLAG_DATA_ONLY,
 672                                        0, rewrite_dir_block, &ctx);
 673
 674         ext2fs_free_mem(&ctx.buf);
 675         if (retval)
 676                 return retval;
 677
 678         if (ctx.is_htree && ctx.clear_htree) {
 679                 inode->i_flags &= ~EXT2_INDEX_FL;
 680                 retval = ext2fs_write_inode(fs, dir, inode);
 681                 if (retval)
 682                         return retval;
 683         }
 684
 685         return ctx.errcode;
 686 }
 687
 688 /*
 689  * Context information that does not change across rewrite_one_inode()
 690  * invocations.
 691  */
 692 struct rewrite_context {
 693         ext2_filsys fs;
 694         struct ext2_inode *zero_inode;
 695         char *ea_buf;
 696         int inode_size;
 697 };
 698
 699 #define fatal_err(code, args...)                \
 700         do {                                    \
 701                 com_err(__func__, code, args);  \
 702                 exit(1);                        \
 703         } while (0);
 704
 705 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 706                                  struct ext2_inode *inode)
 707 {
 708         errcode_t retval;
 709         ext2_file_t file;
 710         __u32 hash;
 711
 712         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 713         if (retval)
 714                 fatal_err(retval, "open ea_inode");
 715         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 716                                   NULL);
 717         if (retval)
 718                 fatal_err(retval, "read ea_inode");
 719         retval = ext2fs_file_close(file);
 720         if (retval)
 721                 fatal_err(retval, "close ea_inode");
 722
 723         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 724                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 725         ext2fs_set_ea_inode_hash(inode, hash);
 726 }
 727
 728 static int update_xattr_entry_hashes(ext2_filsys fs,
 729                                      struct ext2_ext_attr_entry *entry,
 730                                      struct ext2_ext_attr_entry *end)
 731 {
 732         int modified = 0;
 733         errcode_t retval;
 734
 735         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 736                 if (entry->e_value_inum) {
 737                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 738                                                              &entry->e_hash);
 739                         if (retval)
 740                                 fatal_err(retval, "hash ea_inode entry");
 741                         modified = 1;
 742                 }
 743                 entry = EXT2_EXT_ATTR_NEXT(entry);
 744         }
 745         return modified;
 746 }
 747
 748 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 749                                        struct ext2_inode_large *inode)
 750 {
 751         struct ext2_ext_attr_entry *start, *end;
 752         __u32 *ea_magic;
 753
 754         if (inode->i_extra_isize == 0)
 755                 return;
 756
 757         if (inode->i_extra_isize & 3 ||
 758             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 759                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 760
 761         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 762                                 inode->i_extra_isize);
 763         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 764                 return;
 765
 766         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 767         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 768
 769         update_xattr_entry_hashes(ctx->fs, start, end);
 770 }
 771
 772 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 773                                       char *block_buf)
 774 {
 775         struct ext2_ext_attr_header *header;
 776         struct ext2_ext_attr_entry *start, *end;
 777
 778         header = (struct ext2_ext_attr_header *)block_buf;
 779         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 780                 return;
 781
 782         start = (struct ext2_ext_attr_entry *)(header+1);
 783         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 784
 785         if (update_xattr_entry_hashes(ctx->fs, start, end))
 786                 ext2fs_ext_attr_block_rehash(header, end);
 787 }
 788
 789 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 790                               struct ext2_inode *inode)
 791 {
 792         blk64_t file_acl_block;
 793         errcode_t retval;
 794
 795         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 796                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 797                         return;
 798                 memset(inode, 0, ctx->inode_size);
 799         }
 800
 801         if (inode->i_flags & EXT4_EA_INODE_FL)
 802                 update_ea_inode_hash(ctx, ino, inode);
 803
 804         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 805                 update_inline_xattr_hashes(ctx,
 806                                            (struct ext2_inode_large *)inode);
 807
 808         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 809         if (retval)
 810                 fatal_err(retval, "while writing inode");
 811
 812         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 813         if (retval)
 814                 fatal_err(retval, "while rewriting extents");
 815
 816         if (LINUX_S_ISDIR(inode->i_mode) &&
 817             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 818                 retval = rewrite_directory(ctx->fs, ino, inode);
 819                 if (retval)
 820                         fatal_err(retval, "while rewriting directories");
 821         }
 822
 823         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 824         if (!file_acl_block)
 825                 return;
 826
 827         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 828                                        ino);
 829         if (retval)
 830                 fatal_err(retval, "while rewriting extended attribute");
 831
 832         update_block_xattr_hashes(ctx, ctx->ea_buf);
 833         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 834                                         ino);
 835         if (retval)
 836                 fatal_err(retval, "while rewriting extended attribute");
 837 }
 838
 839 #define REWRITE_EA_FL           0x01    /* Rewrite EA inodes */
 840 #define REWRITE_DIR_FL          0x02    /* Rewrite directories */
 841 #define REWRITE_NONDIR_FL       0x04    /* Rewrite other inodes */
 842 #define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
 843
 844 static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
 845 {
 846         ext2_inode_scan scan;
 847         errcode_t       retval;
 848         ext2_ino_t      ino;
 849         struct ext2_inode *inode;
 850         int rewrite;
 851
 852         retval = ext2fs_get_mem(ctx->inode_size, &inode);
 853         if (retval)
 854                 fatal_err(retval, "while allocating memory");
 855
 856         retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
 857         if (retval)
 858                 fatal_err(retval, "while opening inode scan");
 859
 860         do {
 861                 retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 862                                                     ctx->inode_size);
 863                 if (retval)
 864                         fatal_err(retval, "while getting next inode");
 865                 if (!ino)
 866                         break;
 867
 868                 rewrite = 0;
 869                 if (inode->i_flags & EXT4_EA_INODE_FL) {
 870                         if (flags & REWRITE_EA_FL)
 871                                 rewrite = 1;
 872                 } else if (LINUX_S_ISDIR(inode->i_mode)) {
 873                         if (flags & REWRITE_DIR_FL)
 874                                 rewrite = 1;
 875                 } else {
 876                         if (flags & REWRITE_NONDIR_FL)
 877                                 rewrite = 1;
 878                 }
 879                 if (rewrite)
 880                         rewrite_one_inode(ctx, ino, inode);
 881         } while (ino);
 882         ext2fs_close_inode_scan(scan);
 883         ext2fs_free_mem(&inode);
 884 }
 885
 886 /*
 887  * Forcibly rewrite checksums in inodes specified by 'flags'
 888  */
 889 static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
 890 {
 891         struct rewrite_context ctx = {
 892                 .fs = fs,
 893                 .inode_size = EXT2_INODE_SIZE(fs->super),
 894         };
 895         errcode_t retval;
 896
 897         if (fs->super->s_creator_os == EXT2_OS_HURD)
 898                 return;
 899
 900         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 901         if (retval)
 902                 fatal_err(retval, "while allocating memory");
 903
 904         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 905         if (retval)
 906                 fatal_err(retval, "while allocating memory");
 907
 908         /*
 909          * Extended attribute inodes have a lookup hash that needs to be
 910          * recalculated with the new csum_seed. Other inodes referencing xattr
 911          * inodes need this value to be up to date. That's why we do two passes:
 912          *
 913          * pass 1: update xattr inodes to update their lookup hash as well as
 914          *         other checksums.
 915          *
 916          * pass 2: go over other inodes to update their checksums.
 917          */
 918         if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
 919                 rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
 920         flags &= ~REWRITE_EA_FL;
 921         rewrite_inodes_pass(&ctx, flags);
 922
 923         ext2fs_free_mem(&ctx.zero_inode);
 924         ext2fs_free_mem(&ctx.ea_buf);
 925 }
 926
 927 static void rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 928 {
 929         errcode_t retval;
 930         dgrp_t i;
 931
 932         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 933         ext2fs_init_csum_seed(fs);
 934         for (i = 0; i < fs->group_desc_count; i++)
 935                 ext2fs_group_desc_csum_set(fs, i);
 936         retval = ext2fs_read_bitmaps(fs);
 937         if (retval)
 938                 fatal_err(retval, "while reading bitmaps");
 939         rewrite_inodes(fs, flags);
 940         ext2fs_mark_ib_dirty(fs);
 941         ext2fs_mark_bb_dirty(fs);
 942         ext2fs_mmp_update2(fs, 1);
 943         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 944         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 945         if (ext2fs_has_feature_metadata_csum(fs->super))
 946                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 947         else
 948                 fs->super->s_checksum_type = 0;
 949         ext2fs_mark_super_dirty(fs);
 950 }
 951
 952 static void enable_uninit_bg(ext2_filsys fs)
 953 {
 954         struct ext2_group_desc *gd;
 955         dgrp_t i;
 956
 957         for (i = 0; i < fs->group_desc_count; i++) {
 958                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 959                 gd->bg_itable_unused = 0;
 960                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 961                 ext2fs_group_desc_csum_set(fs, i);
 962         }
 963         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 964 }
 965
 966 static errcode_t zero_empty_inodes(ext2_filsys fs)
 967 {
 968         int length = EXT2_INODE_SIZE(fs->super);
 969         struct ext2_inode *inode = NULL;
 970         ext2_inode_scan scan;
 971         errcode_t       retval;
 972         ext2_ino_t      ino;
 973
 974         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 975         if (retval)
 976                 goto out;
 977
 978         retval = ext2fs_get_mem(length, &inode);
 979         if (retval)
 980                 goto out;
 981
 982         do {
 983                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 984                 if (retval)
 985                         goto out;
 986                 if (!ino)
 987                         break;
 988                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 989                         memset(inode, 0, length);
 990                         retval = ext2fs_write_inode_full(fs, ino, inode,
 991                                                          length);
 992                         if (retval)
 993                                 goto out;
 994                 }
 995         } while (1);
 996
 997 out:
 998         ext2fs_free_mem(&inode);
 999         ext2fs_close_inode_scan(scan);
1000         return retval;
1001 }
1002
1003 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1004 {
1005         struct ext2_group_desc *gd;
1006         dgrp_t i;
1007         errcode_t retval;
1008         blk64_t b, c, d;
1009
1010         /* Load bitmaps to ensure that the uninit ones get written out */
1011         fs->super->s_feature_ro_compat |= csum_feature_flag;
1012         retval = ext2fs_read_bitmaps(fs);
1013         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1014         if (retval) {
1015                 com_err("disable_uninit_bg", retval,
1016                         "while reading bitmaps");
1017                 request_fsck_afterwards(fs);
1018                 return retval;
1019         }
1020         ext2fs_mark_ib_dirty(fs);
1021         ext2fs_mark_bb_dirty(fs);
1022
1023         /* If we're only turning off uninit_bg, zero the inodes */
1024         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1025                 retval = zero_empty_inodes(fs);
1026                 if (retval) {
1027                         com_err("disable_uninit_bg", retval,
1028                                 "while zeroing unused inodes");
1029                         request_fsck_afterwards(fs);
1030                         return retval;
1031                 }
1032         }
1033
1034         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1035         for (i = 0; i < fs->group_desc_count; i++) {
1036                 b = ext2fs_block_bitmap_loc(fs, i);
1037                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1038                 b = ext2fs_inode_bitmap_loc(fs, i);
1039                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1040
1041                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1042                 if (retval == 0 && b)
1043                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1044                 if (retval == 0 && c)
1045                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1046                 if (retval == 0 && d)
1047                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1048                 if (retval) {
1049                         com_err("disable_uninit_bg", retval,
1050                                 "while initializing block bitmaps");
1051                         request_fsck_afterwards(fs);
1052                 }
1053
1054                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1055                 gd->bg_itable_unused = 0;
1056                 gd->bg_flags = 0;
1057                 ext2fs_group_desc_csum_set(fs, i);
1058         }
1059         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1060         ext2fs_mark_super_dirty(fs);
1061
1062         return 0;
1063 }
1064
1065 static void
1066 try_confirm_csum_seed_support(void)
1067 {
1068         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1069                 fputs(_("WARNING: Could not confirm kernel support for "
1070                         "metadata_csum_seed.\n  This requires Linux >= "
1071                         "v4.4.\n"), stderr);
1072 }
1073
1074 /*
1075  * Update the feature set as provided by the user.
1076  */
1077 static int update_feature_set(ext2_filsys fs, char *features)
1078 {
1079         struct ext2_super_block *sb = fs->super;
1080         __u32           old_features[3];
1081         int             type_err;
1082         unsigned int    mask_err;
1083         errcode_t       err;
1084         enum quota_type qtype;
1085
1086 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1087                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1088 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1089                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1090 #define FEATURE_CHANGED(type, mask) ((mask) & \
1091                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1092
1093         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1094         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1095         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1096
1097         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1098                               ok_features, clear_ok_features,
1099                               &type_err, &mask_err)) {
1100                 if (!mask_err)
1101                         fprintf(stderr,
1102                                 _("Invalid filesystem option set: %s\n"),
1103                                 features);
1104                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1105                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1106                                           "not supported.\n"),
1107                                 e2p_feature2string(type_err &
1108                                                    E2P_FEATURE_TYPE_MASK,
1109                                                    mask_err));
1110                 else
1111                         fprintf(stderr, _("Setting filesystem feature '%s' "
1112                                           "not supported.\n"),
1113                                 e2p_feature2string(type_err, mask_err));
1114                 return 1;
1115         }
1116
1117         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1118                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1119                     !(mount_flags & EXT2_MF_READONLY)) {
1120                         fputs(_("The has_journal feature may only be "
1121                                 "cleared when the filesystem is\n"
1122                                 "unmounted or mounted "
1123                                 "read-only.\n"), stderr);
1124                         return 1;
1125                 }
1126                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1127                     f_flag < 2) {
1128                         fputs(_("The needs_recovery flag is set.  "
1129                                 "Please run e2fsck before clearing\n"
1130                                 "the has_journal flag.\n"), stderr);
1131                         return 1;
1132                 }
1133                 if (sb->s_journal_inum) {
1134                         if (remove_journal_inode(fs))
1135                                 return 1;
1136                 }
1137                 if (sb->s_journal_dev) {
1138                         if (remove_journal_device(fs))
1139                                 return 1;
1140                 }
1141         }
1142
1143         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1144                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1145                 if (ext2fs_has_feature_meta_bg(sb)) {
1146                         fputs(_("Setting filesystem feature 'sparse_super' "
1147                                 "not supported\nfor filesystems with "
1148                                 "the meta_bg feature enabled.\n"),
1149                                 stderr);
1150                         return 1;
1151                 }
1152         }
1153
1154         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1155                 int error;
1156
1157                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1158                     (mount_flags & EXT2_MF_READONLY)) {
1159                         fputs(_("The multiple mount protection feature can't\n"
1160                                 "be set if the filesystem is mounted or\n"
1161                                 "read-only.\n"), stderr);
1162                         return 1;
1163                 }
1164
1165                 error = ext2fs_mmp_init(fs);
1166                 if (error) {
1167                         fputs(_("\nError while enabling multiple mount "
1168                                 "protection feature."), stderr);
1169                         return 1;
1170                 }
1171
1172                 /*
1173                  * We want to update group desc with the new free blocks count
1174                  */
1175                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1176
1177                 printf(_("Multiple mount protection has been enabled "
1178                          "with update interval %ds.\n"),
1179                        sb->s_mmp_update_interval);
1180         }
1181
1182         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1183                 int error;
1184
1185                 if (mount_flags & EXT2_MF_READONLY) {
1186                         fputs(_("The multiple mount protection feature cannot\n"
1187                                 "be disabled if the filesystem is readonly.\n"),
1188                                 stderr);
1189                         return 1;
1190                 }
1191
1192                 error = ext2fs_read_bitmaps(fs);
1193                 if (error) {
1194                         fputs(_("Error while reading bitmaps\n"), stderr);
1195                         return 1;
1196                 }
1197
1198                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1199                 if (error) {
1200                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1201
1202                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1203                                 printf(_("Magic number in MMP block does not "
1204                                          "match. expected: %x, actual: %x\n"),
1205                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1206                         else
1207                                 com_err(program_name, error, "%s",
1208                                         _("while reading MMP block."));
1209                         goto mmp_error;
1210                 }
1211
1212                 /* We need to force out the group descriptors as well */
1213                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1214                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1215 mmp_error:
1216                 sb->s_mmp_block = 0;
1217                 sb->s_mmp_update_interval = 0;
1218         }
1219
1220         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1221                 /*
1222                  * If adding a journal flag, let the create journal
1223                  * code below handle setting the flag and creating the
1224                  * journal.  We supply a default size if necessary.
1225                  */
1226                 if (!journal_size)
1227                         journal_size = -1;
1228                 ext2fs_clear_feature_journal(sb);
1229         }
1230
1231         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1232                 if (!sb->s_def_hash_version)
1233                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1234                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1235                         uuid_generate((unsigned char *) sb->s_hash_seed);
1236         }
1237
1238         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
1239             ext2fs_has_feature_metadata_csum(sb)) {
1240                 check_fsck_needed(fs,
1241                         _("Disabling directory index on filesystem with "
1242                           "checksums could take some time."));
1243                 if (mount_flags & EXT2_MF_MOUNTED) {
1244                         fputs(_("Cannot disable dir_index on a mounted "
1245                                 "filesystem!\n"), stderr);
1246                         exit(1);
1247                 }
1248                 /*
1249                  * Clearing dir_index on checksummed filesystem requires
1250                  * rewriting all directories to update checksums.
1251                  */
1252                 rewrite_checksums |= REWRITE_DIR_FL;
1253         }
1254
1255         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1256                 if (ext2fs_check_desc(fs)) {
1257                         fputs(_("Clearing the flex_bg flag would "
1258                                 "cause the the filesystem to be\n"
1259                                 "inconsistent.\n"), stderr);
1260                         return 1;
1261                 }
1262         }
1263
1264         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1265                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1266                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1267                     !(mount_flags & EXT2_MF_READONLY)) {
1268                         fputs(_("The huge_file feature may only be "
1269                                 "cleared when the filesystem is\n"
1270                                 "unmounted or mounted "
1271                                 "read-only.\n"), stderr);
1272                         return 1;
1273                 }
1274         }
1275
1276         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1277                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1278                 check_fsck_needed(fs,
1279                         _("Enabling checksums could take some time."));
1280                 if (mount_flags & EXT2_MF_MOUNTED) {
1281                         fputs(_("Cannot enable metadata_csum on a mounted "
1282                                 "filesystem!\n"), stderr);
1283                         exit(1);
1284                 }
1285                 if (!ext2fs_has_feature_extents(fs->super))
1286                         printf("%s",
1287                                _("Extents are not enabled.  The file extent "
1288                                  "tree can be checksummed, whereas block maps "
1289                                  "cannot.  Not enabling extents reduces the "
1290                                  "coverage of metadata checksumming.  "
1291                                  "Re-run with -O extent to rectify.\n"));
1292                 if (!ext2fs_has_feature_64bit(fs->super))
1293                         printf("%s",
1294                                _("64-bit filesystem support is not enabled.  "
1295                                  "The larger fields afforded by this feature "
1296                                  "enable full-strength checksumming.  "
1297                                  "Run resize2fs -b to rectify.\n"));
1298                 rewrite_checksums = REWRITE_ALL;
1299                 /* metadata_csum supersedes uninit_bg */
1300                 ext2fs_clear_feature_gdt_csum(fs->super);
1301
1302                 /* if uninit_bg was previously off, rewrite group desc */
1303                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1304                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1305                         enable_uninit_bg(fs);
1306
1307                 /*
1308                  * Since metadata_csum supersedes uninit_bg, pretend like
1309                  * uninit_bg has been off all along.
1310                  */
1311                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1312                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1313         }
1314
1315         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1316                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1317                 __u32   test_features[3];
1318
1319                 check_fsck_needed(fs,
1320                         _("Disabling checksums could take some time."));
1321                 if (mount_flags & EXT2_MF_MOUNTED) {
1322                         fputs(_("Cannot disable metadata_csum on a mounted "
1323                                 "filesystem!\n"), stderr);
1324                         exit(1);
1325                 }
1326                 rewrite_checksums = REWRITE_ALL;
1327
1328                 /* Enable uninit_bg unless the user expressly turned it off */
1329                 memcpy(test_features, old_features, sizeof(test_features));
1330                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1331                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1332                 e2p_edit_feature2(features, test_features, ok_features,
1333                                   clear_ok_features, NULL, NULL);
1334                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1335                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1336                         ext2fs_set_feature_gdt_csum(fs->super);
1337
1338                 /*
1339                  * If we're turning off metadata_csum and not turning on
1340                  * uninit_bg, rewrite group desc.
1341                  */
1342                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1343                         err = disable_uninit_bg(fs,
1344                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1345                         if (err)
1346                                 return 1;
1347                 } else
1348                         /*
1349                          * metadata_csum previously provided uninit_bg, so if
1350                          * we're also setting the uninit_bg feature bit,
1351                          * pretend like it was previously enabled.  Checksums
1352                          * will be rewritten with crc16 later.
1353                          */
1354                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1355                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1356                 fs->super->s_checksum_seed = 0;
1357                 ext2fs_clear_feature_csum_seed(fs->super);
1358         }
1359
1360         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1361                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1362                 if (mount_flags & EXT2_MF_MOUNTED) {
1363                         fputs(_("Cannot enable uninit_bg on a mounted "
1364                                 "filesystem!\n"), stderr);
1365                         exit(1);
1366                 }
1367
1368                 /* Do not enable uninit_bg when metadata_csum enabled */
1369                 if (ext2fs_has_feature_metadata_csum(fs->super))
1370                         ext2fs_clear_feature_gdt_csum(fs->super);
1371                 else
1372                         enable_uninit_bg(fs);
1373         }
1374
1375         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1376                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1377                 if (mount_flags & EXT2_MF_MOUNTED) {
1378                         fputs(_("Cannot disable uninit_bg on a mounted "
1379                                 "filesystem!\n"), stderr);
1380                         exit(1);
1381                 }
1382
1383                 err = disable_uninit_bg(fs,
1384                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1385                 if (err)
1386                         return 1;
1387         }
1388
1389         /*
1390          * We don't actually toggle 64bit; resize2fs does that.  But this
1391          * must come after the metadata_csum feature_on so that it won't
1392          * complain about the lack of 64bit.
1393          */
1394         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1395                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1396                 if (mount_flags & EXT2_MF_MOUNTED) {
1397                         fprintf(stderr, _("Cannot enable 64-bit mode "
1398                                           "while mounted!\n"));
1399                         exit(1);
1400                 }
1401                 ext2fs_clear_feature_64bit(sb);
1402                 feature_64bit = 1;
1403         }
1404         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1405                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1406                 if (mount_flags & EXT2_MF_MOUNTED) {
1407                         fprintf(stderr, _("Cannot disable 64-bit mode "
1408                                           "while mounted!\n"));
1409                         exit(1);
1410                 }
1411                 ext2fs_set_feature_64bit(sb);
1412                 feature_64bit = -1;
1413         }
1414
1415         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1416                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1417                 /*
1418                  * Set the Q_flag here and handle the quota options in the code
1419                  * below.
1420                  */
1421                 if (!Q_flag) {
1422                         Q_flag = 1;
1423                         /* Enable usr/grp quota by default */
1424                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1425                                 if (qtype != PRJQUOTA)
1426                                         quota_enable[qtype] = QOPT_ENABLE;
1427                                 else
1428                                         quota_enable[qtype] = QOPT_DISABLE;
1429                         }
1430                 }
1431                 ext2fs_clear_feature_quota(sb);
1432         }
1433
1434         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1435                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1436                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1437                         fprintf(stderr, _("Cannot enable project feature; "
1438                                           "inode size too small.\n"));
1439                         exit(1);
1440                 }
1441                 Q_flag = 1;
1442                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1443         }
1444
1445         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1446                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1447                 Q_flag = 1;
1448                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1449         }
1450
1451         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1452                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1453                 /*
1454                  * Set the Q_flag here and handle the quota options in the code
1455                  * below.
1456                  */
1457                 if (Q_flag)
1458                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1459                                 "arguments.\n"), stderr);
1460                 Q_flag = 1;
1461                 /* Disable all quota by default */
1462                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1463                         quota_enable[qtype] = QOPT_DISABLE;
1464         }
1465
1466         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1467                 if (ext2fs_has_feature_casefold(sb)) {
1468                         fputs(_("Cannot enable encrypt feature on filesystems "
1469                                 "with the encoding feature enabled.\n"),
1470                               stderr);
1471                         return 1;
1472                 }
1473                 fs->super->s_encrypt_algos[0] =
1474                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1475                 fs->super->s_encrypt_algos[1] =
1476                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1477         }
1478
1479         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1480                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1481                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1482                         fputs(_("Setting feature 'metadata_csum_seed' "
1483                                 "is only supported\non filesystems with "
1484                                 "the metadata_csum feature enabled.\n"),
1485                                 stderr);
1486                         return 1;
1487                 }
1488                 try_confirm_csum_seed_support();
1489                 fs->super->s_checksum_seed = fs->csum_seed;
1490         }
1491
1492         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1493                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1494                 __le32 uuid_seed;
1495
1496                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1497                                         sizeof(fs->super->s_uuid));
1498                 if (fs->super->s_checksum_seed != uuid_seed) {
1499                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1500                                 fputs(_("UUID has changed since enabling "
1501                 "metadata_csum.  Filesystem must be unmounted "
1502                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1503                                       stderr);
1504                                 return 1;
1505                         }
1506                         check_fsck_needed(fs, _("Recalculating checksums "
1507                                                 "could take some time."));
1508                         rewrite_checksums = REWRITE_ALL;
1509                 }
1510         }
1511
1512         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1513             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1514              sb->s_feature_incompat))
1515                 ext2fs_update_dynamic_rev(fs);
1516
1517         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1518                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1519             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1520                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1521             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1522                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1523             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1524                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1525             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1526                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1527                 request_fsck_afterwards(fs);
1528
1529         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1530             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1531             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1532                 ext2fs_mark_super_dirty(fs);
1533
1534         return 0;
1535 }
1536
1537 /*
1538  * Add a journal to the filesystem.
1539  */
1540 static int add_journal(ext2_filsys fs)
1541 {
1542         unsigned long journal_blocks;
1543         errcode_t       retval;
1544         ext2_filsys     jfs;
1545         io_manager      io_ptr;
1546
1547         if (ext2fs_has_feature_journal(fs->super)) {
1548                 fputs(_("The filesystem already has a journal.\n"), stderr);
1549                 goto err;
1550         }
1551         if (journal_device) {
1552                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1553                                         NULL))
1554                         proceed_question(-1);
1555                 check_mount(journal_device, 0, _("journal"));
1556 #ifdef CONFIG_TESTIO_DEBUG
1557                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1558                         io_ptr = test_io_manager;
1559                         test_io_backing_manager = unix_io_manager;
1560                 } else
1561 #endif
1562                         io_ptr = unix_io_manager;
1563                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1564                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1565                                      fs->blocksize, io_ptr, &jfs);
1566                 if (retval) {
1567                         com_err(program_name, retval,
1568                                 _("\n\twhile trying to open journal on %s\n"),
1569                                 journal_device);
1570                         goto err;
1571                 }
1572                 printf(_("Creating journal on device %s: "),
1573                        journal_device);
1574                 fflush(stdout);
1575
1576                 retval = ext2fs_add_journal_device(fs, jfs);
1577                 ext2fs_close_free(&jfs);
1578                 if (retval) {
1579                         com_err(program_name, retval,
1580                                 _("while adding filesystem to journal on %s"),
1581                                 journal_device);
1582                         goto err;
1583                 }
1584                 fputs(_("done\n"), stdout);
1585         } else if (journal_size) {
1586                 fputs(_("Creating journal inode: "), stdout);
1587                 fflush(stdout);
1588                 journal_blocks = figure_journal_size(journal_size, fs);
1589
1590                 if (journal_location_string)
1591                         journal_location =
1592                                 parse_num_blocks2(journal_location_string,
1593                                                   fs->super->s_log_block_size);
1594                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1595                                                    journal_location,
1596                                                    journal_flags);
1597                 if (retval) {
1598                         fprintf(stderr, "\n");
1599                         com_err(program_name, retval, "%s",
1600                                 _("\n\twhile trying to create journal file"));
1601                         return retval;
1602                 } else
1603                         fputs(_("done\n"), stdout);
1604                 /*
1605                  * If the filesystem wasn't mounted, we need to force
1606                  * the block group descriptors out.
1607                  */
1608                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1609                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1610         }
1611         print_check_message(fs->super->s_max_mnt_count,
1612                             fs->super->s_checkinterval);
1613         return 0;
1614
1615 err:
1616         free(journal_device);
1617         return 1;
1618 }
1619
1620 static void handle_quota_options(ext2_filsys fs)
1621 {
1622         errcode_t retval;
1623         quota_ctx_t qctx;
1624         ext2_ino_t qf_ino;
1625         enum quota_type qtype;
1626         unsigned int qtype_bits = 0;
1627         int need_dirty = 0;
1628
1629         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1630                 if (quota_enable[qtype] != 0)
1631                         break;
1632         if (qtype == MAXQUOTAS)
1633                 /* Nothing to do. */
1634                 return;
1635
1636         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1637             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1638                 fprintf(stderr, _("Cannot enable project quota; "
1639                                   "inode size too small.\n"));
1640                 exit(1);
1641         }
1642
1643         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1644                 if (quota_enable[qtype] == QOPT_ENABLE)
1645                         qtype_bits |= 1 << qtype;
1646         }
1647
1648         retval = quota_init_context(&qctx, fs, qtype_bits);
1649         if (retval) {
1650                 com_err(program_name, retval,
1651                         _("while initializing quota context in support library"));
1652                 exit(1);
1653         }
1654
1655         if (qtype_bits)
1656                 quota_compute_usage(qctx);
1657
1658         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1659                 if (quota_enable[qtype] == QOPT_ENABLE &&
1660                     *quota_sb_inump(fs->super, qtype) == 0) {
1661                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1662                                 retval = quota_update_limits(qctx, qf_ino,
1663                                                              qtype);
1664                                 if (retval) {
1665                                         com_err(program_name, retval,
1666                                                 _("while updating quota limits (%d)"),
1667                                                 qtype);
1668                                         exit(1);
1669                                 }
1670                         }
1671                         retval = quota_write_inode(qctx, 1 << qtype);
1672                         if (retval) {
1673                                 com_err(program_name, retval,
1674                                         _("while writing quota file (%d)"),
1675                                         qtype);
1676                                 exit(1);
1677                         }
1678                         /* Enable Quota feature if one of quota enabled */
1679                         if (!ext2fs_has_feature_quota(fs->super)) {
1680                                 ext2fs_set_feature_quota(fs->super);
1681                                 need_dirty = 1;
1682                         }
1683                         if (qtype == PRJQUOTA &&
1684                             !ext2fs_has_feature_project(fs->super)) {
1685                                 ext2fs_set_feature_project(fs->super);
1686                                 need_dirty = 1;
1687                         }
1688                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1689                         retval = quota_remove_inode(fs, qtype);
1690                         if (retval) {
1691                                 com_err(program_name, retval,
1692                                         _("while removing quota file (%d)"),
1693                                         qtype);
1694                                 exit(1);
1695                         }
1696                         if (qtype == PRJQUOTA) {
1697                                 ext2fs_clear_feature_project(fs->super);
1698                                 need_dirty = 1;
1699                         }
1700                 }
1701         }
1702
1703         quota_release_context(&qctx);
1704         /* Clear Quota feature if all quota types disabled. */
1705         if (!qtype_bits) {
1706                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1707                         if (*quota_sb_inump(fs->super, qtype))
1708                                 break;
1709                 if (qtype == MAXQUOTAS) {
1710                         ext2fs_clear_feature_quota(fs->super);
1711                         need_dirty = 1;
1712                 }
1713
1714         }
1715         if (need_dirty)
1716                 ext2fs_mark_super_dirty(fs);
1717         return;
1718 }
1719
1720 static int option_handle_function(char *token)
1721 {
1722         if (strncmp(token, "usr", 3) == 0) {
1723                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1724         } else if (strncmp(token, "^usr", 4) == 0) {
1725                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1726         } else if (strncmp(token, "grp", 3) == 0) {
1727                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1728         } else if (strncmp(token, "^grp", 4) == 0) {
1729                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1730         } else if (strncmp(token, "prj", 3) == 0) {
1731                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1732         } else if (strncmp(token, "^prj", 4) == 0) {
1733                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1734         } else {
1735                 fputs(_("\nBad quota options specified.\n\n"
1736                         "Following valid quota options are available "
1737                         "(pass by separating with comma):\n"
1738                         "\t[^]usr[quota]\n"
1739                         "\t[^]grp[quota]\n"
1740                         "\t[^]prj[quota]\n"
1741                         "\n\n"), stderr);
1742                 return 1;
1743         }
1744         return 0;
1745 }
1746
1747 static void parse_e2label_options(int argc, char ** argv)
1748 {
1749         if ((argc < 2) || (argc > 3)) {
1750                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1751                 exit(1);
1752         }
1753         io_options = strchr(argv[1], '?');
1754         if (io_options)
1755                 *io_options++ = 0;
1756         device_name = blkid_get_devname(NULL, argv[1], NULL);
1757         if (!device_name) {
1758                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1759                         argv[1]);
1760                 exit(1);
1761         }
1762         open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
1763         if (argc == 3) {
1764                 open_flag |= EXT2_FLAG_RW;
1765                 L_flag = 1;
1766                 new_label = argv[2];
1767         } else
1768                 print_label++;
1769 }
1770
1771 static time_t parse_time(char *str)
1772 {
1773         struct  tm      ts;
1774
1775         if (strcmp(str, "now") == 0) {
1776                 return (time(0));
1777         }
1778         memset(&ts, 0, sizeof(ts));
1779 #ifdef HAVE_STRPTIME
1780         strptime(str, "%Y%m%d%H%M%S", &ts);
1781 #else
1782         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1783                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1784         ts.tm_year -= 1900;
1785         ts.tm_mon -= 1;
1786         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1787             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1788             ts.tm_min > 59 || ts.tm_sec > 61)
1789                 ts.tm_mday = 0;
1790 #endif
1791         if (ts.tm_mday == 0) {
1792                 com_err(program_name, 0,
1793                         _("Couldn't parse date/time specifier: %s"),
1794                         str);
1795                 usage();
1796         }
1797         ts.tm_isdst = -1;
1798         return (mktime(&ts));
1799 }
1800
1801 static void parse_tune2fs_options(int argc, char **argv)
1802 {
1803         int c;
1804         char *tmp;
1805         struct group *gr;
1806         struct passwd *pw;
1807         int ret;
1808         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1809
1810         open_flag = 0;
1811         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1812         while ((c = getopt(argc, argv, optstring)) != EOF)
1813                 switch (c) {
1814                 case 'c':
1815                         max_mount_count = strtol(optarg, &tmp, 0);
1816                         if (*tmp || max_mount_count > 16000) {
1817                                 com_err(program_name, 0,
1818                                         _("bad mounts count - %s"),
1819                                         optarg);
1820                                 usage();
1821                         }
1822                         if (max_mount_count == 0)
1823                                 max_mount_count = -1;
1824                         c_flag = 1;
1825                         open_flag = EXT2_FLAG_RW;
1826                         break;
1827                 case 'C':
1828                         mount_count = strtoul(optarg, &tmp, 0);
1829                         if (*tmp || mount_count > 16000) {
1830                                 com_err(program_name, 0,
1831                                         _("bad mounts count - %s"),
1832                                         optarg);
1833                                 usage();
1834                         }
1835                         C_flag = 1;
1836                         open_flag = EXT2_FLAG_RW;
1837                         break;
1838                 case 'e':
1839                         if (strcmp(optarg, "continue") == 0)
1840                                 errors = EXT2_ERRORS_CONTINUE;
1841                         else if (strcmp(optarg, "remount-ro") == 0)
1842                                 errors = EXT2_ERRORS_RO;
1843                         else if (strcmp(optarg, "panic") == 0)
1844                                 errors = EXT2_ERRORS_PANIC;
1845                         else {
1846                                 com_err(program_name, 0,
1847                                         _("bad error behavior - %s"),
1848                                         optarg);
1849                                 usage();
1850                         }
1851                         e_flag = 1;
1852                         open_flag = EXT2_FLAG_RW;
1853                         break;
1854                 case 'E':
1855                         extended_cmd = optarg;
1856                         open_flag |= EXT2_FLAG_RW;
1857                         break;
1858                 case 'f': /* Force */
1859                         f_flag++;
1860                         break;
1861                 case 'g':
1862                         resgid = strtoul(optarg, &tmp, 0);
1863                         if (*tmp) {
1864                                 gr = getgrnam(optarg);
1865                                 if (gr == NULL)
1866                                         tmp = optarg;
1867                                 else {
1868                                         resgid = gr->gr_gid;
1869                                         *tmp = 0;
1870                                 }
1871                         }
1872                         if (*tmp) {
1873                                 com_err(program_name, 0,
1874                                         _("bad gid/group name - %s"),
1875                                         optarg);
1876                                 usage();
1877                         }
1878                         g_flag = 1;
1879                         open_flag = EXT2_FLAG_RW;
1880                         break;
1881                 case 'i':
1882                         interval = strtoul(optarg, &tmp, 0);
1883                         switch (*tmp) {
1884                         case 's':
1885                                 tmp++;
1886                                 break;
1887                         case '\0':
1888                         case 'd':
1889                         case 'D': /* days */
1890                                 interval *= 86400;
1891                                 if (*tmp != '\0')
1892                                         tmp++;
1893                                 break;
1894                         case 'm':
1895                         case 'M': /* months! */
1896                                 interval *= 86400 * 30;
1897                                 tmp++;
1898                                 break;
1899                         case 'w':
1900                         case 'W': /* weeks */
1901                                 interval *= 86400 * 7;
1902                                 tmp++;
1903                                 break;
1904                         }
1905                         if (*tmp) {
1906                                 com_err(program_name, 0,
1907                                         _("bad interval - %s"), optarg);
1908                                 usage();
1909                         }
1910                         i_flag = 1;
1911                         open_flag = EXT2_FLAG_RW;
1912                         break;
1913                 case 'j':
1914                         if (!journal_size)
1915                                 journal_size = -1;
1916                         open_flag = EXT2_FLAG_RW;
1917                         break;
1918                 case 'J':
1919                         parse_journal_opts(optarg);
1920                         open_flag = EXT2_FLAG_RW;
1921                         break;
1922                 case 'l':
1923                         l_flag = 1;
1924                         break;
1925                 case 'L':
1926                         new_label = optarg;
1927                         L_flag = 1;
1928                         open_flag |= EXT2_FLAG_RW |
1929                                 EXT2_FLAG_JOURNAL_DEV_OK;
1930                         break;
1931                 case 'm':
1932                         reserved_ratio = strtod(optarg, &tmp);
1933                         if (*tmp || reserved_ratio > 50 ||
1934                             reserved_ratio < 0) {
1935                                 com_err(program_name, 0,
1936                                         _("bad reserved block ratio - %s"),
1937                                         optarg);
1938                                 usage();
1939                         }
1940                         m_flag = 1;
1941                         open_flag = EXT2_FLAG_RW;
1942                         break;
1943                 case 'M':
1944                         new_last_mounted = optarg;
1945                         M_flag = 1;
1946                         open_flag = EXT2_FLAG_RW;
1947                         break;
1948                 case 'o':
1949                         if (mntopts_cmd) {
1950                                 com_err(program_name, 0, "%s",
1951                                         _("-o may only be specified once"));
1952                                 usage();
1953                         }
1954                         mntopts_cmd = optarg;
1955                         open_flag = EXT2_FLAG_RW;
1956                         break;
1957                 case 'O':
1958                         if (features_cmd) {
1959                                 com_err(program_name, 0, "%s",
1960                                         _("-O may only be specified once"));
1961                                 usage();
1962                         }
1963                         features_cmd = optarg;
1964                         open_flag = EXT2_FLAG_RW;
1965                         break;
1966                 case 'Q':
1967                         Q_flag = 1;
1968                         ret = parse_quota_opts(optarg, option_handle_function);
1969                         if (ret)
1970                                 exit(1);
1971                         open_flag = EXT2_FLAG_RW;
1972                         break;
1973                 case 'r':
1974                         reserved_blocks = strtoul(optarg, &tmp, 0);
1975                         if (*tmp) {
1976                                 com_err(program_name, 0,
1977                                         _("bad reserved blocks count - %s"),
1978                                         optarg);
1979                                 usage();
1980                         }
1981                         r_flag = 1;
1982                         open_flag = EXT2_FLAG_RW;
1983                         break;
1984                 case 's': /* Deprecated */
1985                         s_flag = atoi(optarg);
1986                         open_flag = EXT2_FLAG_RW;
1987                         break;
1988                 case 'T':
1989                         T_flag = 1;
1990                         last_check_time = parse_time(optarg);
1991                         open_flag = EXT2_FLAG_RW;
1992                         break;
1993                 case 'u':
1994                                 resuid = strtoul(optarg, &tmp, 0);
1995                                 if (*tmp) {
1996                                         pw = getpwnam(optarg);
1997                                         if (pw == NULL)
1998                                                 tmp = optarg;
1999                                         else {
2000                                                 resuid = pw->pw_uid;
2001                                                 *tmp = 0;
2002                                         }
2003                                 }
2004                                 if (*tmp) {
2005                                         com_err(program_name, 0,
2006                                                 _("bad uid/user name - %s"),
2007                                                 optarg);
2008                                         usage();
2009                                 }
2010                                 u_flag = 1;
2011                                 open_flag = EXT2_FLAG_RW;
2012                                 break;
2013                 case 'U':
2014                         new_UUID = optarg;
2015                         U_flag = 1;
2016                         open_flag = EXT2_FLAG_RW |
2017                                 EXT2_FLAG_JOURNAL_DEV_OK;
2018                         break;
2019                 case 'I':
2020                         new_inode_size = strtoul(optarg, &tmp, 0);
2021                         if (*tmp) {
2022                                 com_err(program_name, 0,
2023                                         _("bad inode size - %s"),
2024                                         optarg);
2025                                 usage();
2026                         }
2027                         if (!((new_inode_size &
2028                                (new_inode_size - 1)) == 0)) {
2029                                 com_err(program_name, 0,
2030                                         _("Inode size must be a "
2031                                           "power of two- %s"),
2032                                         optarg);
2033                                 usage();
2034                         }
2035                         open_flag = EXT2_FLAG_RW;
2036                         I_flag = 1;
2037                         break;
2038                 case 'z':
2039                         undo_file = optarg;
2040                         break;
2041                 default:
2042                         usage();
2043                 }
2044         if (optind < argc - 1 || optind == argc)
2045                 usage();
2046         if (!open_flag && !l_flag)
2047                 usage();
2048         io_options = strchr(argv[optind], '?');
2049         if (io_options)
2050                 *io_options++ = 0;
2051         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2052         if (!device_name) {
2053                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2054                         argv[optind]);
2055                 exit(1);
2056         }
2057 }
2058
2059 #ifdef CONFIG_BUILD_FINDFS
2060 void do_findfs(int argc, char **argv)
2061 {
2062         char    *dev;
2063
2064         if ((argc != 2) ||
2065             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2066                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2067                 exit(2);
2068         }
2069         dev = blkid_get_devname(NULL, argv[1], NULL);
2070         if (!dev) {
2071                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2072                         argv[1]);
2073                 exit(1);
2074         }
2075         puts(dev);
2076         exit(0);
2077 }
2078 #endif
2079
2080 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2081 {
2082         char    *buf, *token, *next, *p, *arg;
2083         int     len, hash_alg;
2084         int     r_usage = 0;
2085
2086         len = strlen(opts);
2087         buf = malloc(len+1);
2088         if (!buf) {
2089                 fprintf(stderr, "%s",
2090                         _("Couldn't allocate memory to parse options!\n"));
2091                 return 1;
2092         }
2093         strcpy(buf, opts);
2094         for (token = buf; token && *token; token = next) {
2095                 p = strchr(token, ',');
2096                 next = 0;
2097                 if (p) {
2098                         *p = 0;
2099                         next = p+1;
2100                 }
2101                 arg = strchr(token, '=');
2102                 if (arg) {
2103                         *arg = 0;
2104                         arg++;
2105                 }
2106                 if (strcmp(token, "clear-mmp") == 0 ||
2107                     strcmp(token, "clear_mmp") == 0) {
2108                         clear_mmp = 1;
2109                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2110                         unsigned long intv;
2111                         if (!arg) {
2112                                 r_usage++;
2113                                 continue;
2114                         }
2115                         intv = strtoul(arg, &p, 0);
2116                         if (*p) {
2117                                 fprintf(stderr,
2118                                         _("Invalid mmp_update_interval: %s\n"),
2119                                         arg);
2120                                 r_usage++;
2121                                 continue;
2122                         }
2123                         if (intv == 0) {
2124                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2125                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2126                                 fprintf(stderr,
2127                                         _("mmp_update_interval too big: %lu\n"),
2128                                         intv);
2129                                 r_usage++;
2130                                 continue;
2131                         }
2132                         printf(P_("Setting multiple mount protection update "
2133                                   "interval to %lu second\n",
2134                                   "Setting multiple mount protection update "
2135                                   "interval to %lu seconds\n", intv),
2136                                intv);
2137                         fs->super->s_mmp_update_interval = intv;
2138                         ext2fs_mark_super_dirty(fs);
2139                 } else if (!strcmp(token, "force_fsck")) {
2140                         fs->super->s_state |= EXT2_ERROR_FS;
2141                         printf(_("Setting filesystem error flag to force fsck.\n"));
2142                         ext2fs_mark_super_dirty(fs);
2143                 } else if (!strcmp(token, "test_fs")) {
2144                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2145                         printf("Setting test filesystem flag\n");
2146                         ext2fs_mark_super_dirty(fs);
2147                 } else if (!strcmp(token, "^test_fs")) {
2148                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2149                         printf("Clearing test filesystem flag\n");
2150                         ext2fs_mark_super_dirty(fs);
2151                 } else if (strcmp(token, "stride") == 0) {
2152                         if (!arg) {
2153                                 r_usage++;
2154                                 continue;
2155                         }
2156                         stride = strtoul(arg, &p, 0);
2157                         if (*p) {
2158                                 fprintf(stderr,
2159                                         _("Invalid RAID stride: %s\n"),
2160                                         arg);
2161                                 r_usage++;
2162                                 continue;
2163                         }
2164                         stride_set = 1;
2165                 } else if (strcmp(token, "stripe-width") == 0 ||
2166                            strcmp(token, "stripe_width") == 0) {
2167                         if (!arg) {
2168                                 r_usage++;
2169                                 continue;
2170                         }
2171                         stripe_width = strtoul(arg, &p, 0);
2172                         if (*p) {
2173                                 fprintf(stderr,
2174                                         _("Invalid RAID stripe-width: %s\n"),
2175                                         arg);
2176                                 r_usage++;
2177                                 continue;
2178                         }
2179                         stripe_width_set = 1;
2180                 } else if (strcmp(token, "hash_alg") == 0 ||
2181                            strcmp(token, "hash-alg") == 0) {
2182                         if (!arg) {
2183                                 r_usage++;
2184                                 continue;
2185                         }
2186                         hash_alg = e2p_string2hash(arg);
2187                         if (hash_alg < 0) {
2188                                 fprintf(stderr,
2189                                         _("Invalid hash algorithm: %s\n"),
2190                                         arg);
2191                                 r_usage++;
2192                                 continue;
2193                         }
2194                         fs->super->s_def_hash_version = hash_alg;
2195                         printf(_("Setting default hash algorithm "
2196                                  "to %s (%d)\n"),
2197                                arg, hash_alg);
2198                         ext2fs_mark_super_dirty(fs);
2199                 } else if (!strcmp(token, "mount_opts")) {
2200                         if (!arg) {
2201                                 r_usage++;
2202                                 continue;
2203                         }
2204                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2205                                 fprintf(stderr,
2206                                         "Extended mount options too long\n");
2207                                 continue;
2208                         }
2209                         ext_mount_opts = strdup(arg);
2210                 } else
2211                         r_usage++;
2212         }
2213         if (r_usage) {
2214                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2215                         "Extended options are separated by commas, "
2216                         "and may take an argument which\n"
2217                         "\tis set off by an equals ('=') sign.\n\n"
2218                         "Valid extended options are:\n"
2219                         "\tclear_mmp\n"
2220                         "\thash_alg=<hash algorithm>\n"
2221                         "\tmount_opts=<extended default mount options>\n"
2222                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2223                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2224                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2225                         "\tforce_fsck\n"
2226                         "\ttest_fs\n"
2227                         "\t^test_fs\n"));
2228                 free(buf);
2229                 return 1;
2230         }
2231         free(buf);
2232
2233         return 0;
2234 }
2235
2236 /*
2237  * Fill in the block bitmap bmap with the information regarding the
2238  * blocks to be moved
2239  */
2240 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2241                             ext2fs_block_bitmap bmap)
2242 {
2243         dgrp_t i;
2244         int retval;
2245         ext2_badblocks_list bb_list = 0;
2246         blk64_t j, needed_blocks = 0;
2247         blk64_t start_blk, end_blk;
2248
2249         retval = ext2fs_read_bb_inode(fs, &bb_list);
2250         if (retval)
2251                 return retval;
2252
2253         for (i = 0; i < fs->group_desc_count; i++) {
2254                 start_blk = ext2fs_inode_table_loc(fs, i) +
2255                                         fs->inode_blocks_per_group;
2256
2257                 end_blk = ext2fs_inode_table_loc(fs, i) +
2258                                         new_ino_blks_per_grp;
2259
2260                 for (j = start_blk; j < end_blk; j++) {
2261                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2262                                 /*
2263                                  * IF the block is a bad block we fail
2264                                  */
2265                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2266                                         ext2fs_badblocks_list_free(bb_list);
2267                                         return ENOSPC;
2268                                 }
2269
2270                                 ext2fs_mark_block_bitmap2(bmap, j);
2271                         } else {
2272                                 /*
2273                                  * We are going to use this block for
2274                                  * inode table. So mark them used.
2275                                  */
2276                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2277                         }
2278                 }
2279                 needed_blocks += end_blk - start_blk;
2280         }
2281
2282         ext2fs_badblocks_list_free(bb_list);
2283         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2284                 return ENOSPC;
2285
2286         return 0;
2287 }
2288
2289 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2290 {
2291         dgrp_t group;
2292         group = ext2fs_group_of_blk2(fs, blk);
2293         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2294                 return 1;
2295         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2296                 return 1;
2297         return 0;
2298 }
2299
2300 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2301 {
2302         blk64_t start_blk, end_blk;
2303         start_blk = fs->super->s_first_data_block +
2304                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2305         /*
2306          * We cannot get new block beyond end_blk for for the last block group
2307          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2308          */
2309         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2310         if (blk >= start_blk && blk <= end_blk)
2311                 return 1;
2312         return 0;
2313 }
2314
2315 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2316 {
2317
2318         char *buf;
2319         dgrp_t group = 0;
2320         errcode_t retval;
2321         int meta_data = 0;
2322         blk64_t blk, new_blk, goal;
2323         struct blk_move *bmv;
2324
2325         retval = ext2fs_get_mem(fs->blocksize, &buf);
2326         if (retval)
2327                 return retval;
2328
2329         for (new_blk = blk = fs->super->s_first_data_block;
2330              blk < ext2fs_blocks_count(fs->super); blk++) {
2331                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2332                         continue;
2333
2334                 if (ext2fs_is_meta_block(fs, blk)) {
2335                         /*
2336                          * If the block is mapping a fs meta data block
2337                          * like group desc/block bitmap/inode bitmap. We
2338                          * should find a block in the same group and fix
2339                          * the respective fs metadata pointers. Otherwise
2340                          * fail
2341                          */
2342                         group = ext2fs_group_of_blk2(fs, blk);
2343                         goal = ext2fs_group_first_block2(fs, group);
2344                         meta_data = 1;
2345
2346                 } else {
2347                         goal = new_blk;
2348                 }
2349                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2350                 if (retval)
2351                         goto err_out;
2352
2353                 /* new fs meta data block should be in the same group */
2354                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2355                         retval = ENOSPC;
2356                         goto err_out;
2357                 }
2358
2359                 /* Mark this block as allocated */
2360                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2361
2362                 /* Add it to block move list */
2363                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2364                 if (retval)
2365                         goto err_out;
2366
2367                 bmv->old_loc = blk;
2368                 bmv->new_loc = new_blk;
2369
2370                 list_add(&(bmv->list), &blk_move_list);
2371
2372                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2373                 if (retval)
2374                         goto err_out;
2375
2376                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2377                 if (retval)
2378                         goto err_out;
2379         }
2380
2381 err_out:
2382         ext2fs_free_mem(&buf);
2383         return retval;
2384 }
2385
2386 static blk64_t translate_block(blk64_t blk)
2387 {
2388         struct list_head *entry;
2389         struct blk_move *bmv;
2390
2391         list_for_each(entry, &blk_move_list) {
2392                 bmv = list_entry(entry, struct blk_move, list);
2393                 if (bmv->old_loc == blk)
2394                         return bmv->new_loc;
2395         }
2396
2397         return 0;
2398 }
2399
2400 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2401                          blk64_t *block_nr,
2402                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2403                          blk64_t ref_block EXT2FS_ATTR((unused)),
2404                          int ref_offset EXT2FS_ATTR((unused)),
2405                          void *priv_data)
2406 {
2407         int ret = 0;
2408         blk64_t new_blk;
2409         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2410
2411         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2412                 return 0;
2413         new_blk = translate_block(*block_nr);
2414         if (new_blk) {
2415                 *block_nr = new_blk;
2416                 /*
2417                  * This will force the ext2fs_write_inode in the iterator
2418                  */
2419                 ret |= BLOCK_CHANGED;
2420         }
2421
2422         return ret;
2423 }
2424
2425 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2426 {
2427         errcode_t retval = 0;
2428         ext2_ino_t ino;
2429         blk64_t blk;
2430         char *block_buf = 0;
2431         struct ext2_inode inode;
2432         ext2_inode_scan scan = NULL;
2433
2434         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2435         if (retval)
2436                 return retval;
2437
2438         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2439         if (retval)
2440                 goto err_out;
2441
2442         while (1) {
2443                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2444                 if (retval)
2445                         goto err_out;
2446
2447                 if (!ino)
2448                         break;
2449
2450                 if (inode.i_links_count == 0)
2451                         continue; /* inode not in use */
2452
2453                 /* FIXME!!
2454                  * If we end up modifying the journal inode
2455                  * the sb->s_jnl_blocks will differ. But a
2456                  * subsequent e2fsck fixes that.
2457                  * Do we need to fix this ??
2458                  */
2459
2460                 if (ext2fs_file_acl_block(fs, &inode) &&
2461                     ext2fs_test_block_bitmap2(bmap,
2462                                         ext2fs_file_acl_block(fs, &inode))) {
2463                         blk = translate_block(ext2fs_file_acl_block(fs,
2464                                                                     &inode));
2465                         if (!blk)
2466                                 continue;
2467
2468                         ext2fs_file_acl_block_set(fs, &inode, blk);
2469
2470                         /*
2471                          * Write the inode to disk so that inode table
2472                          * resizing can work
2473                          */
2474                         retval = ext2fs_write_inode(fs, ino, &inode);
2475                         if (retval)
2476                                 goto err_out;
2477                 }
2478
2479                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2480                         continue;
2481
2482                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2483                                                process_block, bmap);
2484                 if (retval)
2485                         goto err_out;
2486
2487         }
2488
2489 err_out:
2490         ext2fs_free_mem(&block_buf);
2491         ext2fs_close_inode_scan(scan);
2492
2493         return retval;
2494 }
2495
2496 /*
2497  * We need to scan for inode and block bitmaps that may need to be
2498  * moved.  This can take place if the filesystem was formatted for
2499  * RAID arrays using the mke2fs's extended option "stride".
2500  */
2501 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2502 {
2503         dgrp_t i;
2504         blk64_t blk, new_blk;
2505
2506         for (i = 0; i < fs->group_desc_count; i++) {
2507                 blk = ext2fs_block_bitmap_loc(fs, i);
2508                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2509                         new_blk = translate_block(blk);
2510                         if (!new_blk)
2511                                 continue;
2512                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2513                 }
2514
2515                 blk = ext2fs_inode_bitmap_loc(fs, i);
2516                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2517                         new_blk = translate_block(blk);
2518                         if (!new_blk)
2519                                 continue;
2520                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2521                 }
2522         }
2523         return 0;
2524 }
2525
2526 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2527 {
2528         dgrp_t i;
2529         blk64_t blk;
2530         errcode_t retval;
2531         int new_ino_blks_per_grp;
2532         unsigned int j;
2533         char *old_itable = NULL, *new_itable = NULL;
2534         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2535         unsigned long old_ino_size;
2536         int old_itable_size, new_itable_size;
2537
2538         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2539         old_ino_size = EXT2_INODE_SIZE(fs->super);
2540
2541         new_ino_blks_per_grp = ext2fs_div_ceil(
2542                                         EXT2_INODES_PER_GROUP(fs->super) *
2543                                         new_ino_size,
2544                                         fs->blocksize);
2545
2546         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2547
2548         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2549         if (retval)
2550                 return retval;
2551
2552         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2553         if (retval)
2554                 goto err_out;
2555
2556         tmp_old_itable = old_itable;
2557         tmp_new_itable = new_itable;
2558
2559         for (i = 0; i < fs->group_desc_count; i++) {
2560                 blk = ext2fs_inode_table_loc(fs, i);
2561                 retval = io_channel_read_blk64(fs->io, blk,
2562                                 fs->inode_blocks_per_group, old_itable);
2563                 if (retval)
2564                         goto err_out;
2565
2566                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2567                         memcpy(new_itable, old_itable, old_ino_size);
2568
2569                         memset(new_itable+old_ino_size, 0,
2570                                         new_ino_size - old_ino_size);
2571
2572                         new_itable += new_ino_size;
2573                         old_itable += old_ino_size;
2574                 }
2575
2576                 /* reset the pointer */
2577                 old_itable = tmp_old_itable;
2578                 new_itable = tmp_new_itable;
2579
2580                 retval = io_channel_write_blk64(fs->io, blk,
2581                                         new_ino_blks_per_grp, new_itable);
2582                 if (retval)
2583                         goto err_out;
2584         }
2585
2586         /* Update the meta data */
2587         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2588         ext2fs_free_inode_cache(fs->icache);
2589         fs->icache = 0;
2590         fs->super->s_inode_size = new_ino_size;
2591
2592 err_out:
2593         if (old_itable)
2594                 ext2fs_free_mem(&old_itable);
2595
2596         if (new_itable)
2597                 ext2fs_free_mem(&new_itable);
2598
2599         return retval;
2600 }
2601
2602 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2603 {
2604         blk64_t         blk;
2605         ext2_ino_t      ino;
2606         unsigned int    group = 0;
2607         unsigned int    count = 0;
2608         int             total_free = 0;
2609         int             group_free = 0;
2610
2611         /*
2612          * First calculate the block statistics
2613          */
2614         for (blk = fs->super->s_first_data_block;
2615              blk < ext2fs_blocks_count(fs->super); blk++) {
2616                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2617                         group_free++;
2618                         total_free++;
2619                 }
2620                 count++;
2621                 if ((count == fs->super->s_blocks_per_group) ||
2622                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2623                         ext2fs_bg_free_blocks_count_set(fs, group++,
2624                                                         group_free);
2625                         count = 0;
2626                         group_free = 0;
2627                 }
2628         }
2629         total_free = EXT2FS_C2B(fs, total_free);
2630         ext2fs_free_blocks_count_set(fs->super, total_free);
2631
2632         /*
2633          * Next, calculate the inode statistics
2634          */
2635         group_free = 0;
2636         total_free = 0;
2637         count = 0;
2638         group = 0;
2639
2640         /* Protect loop from wrap-around if s_inodes_count maxed */
2641         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2642                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2643                         group_free++;
2644                         total_free++;
2645                 }
2646                 count++;
2647                 if ((count == fs->super->s_inodes_per_group) ||
2648                     (ino == fs->super->s_inodes_count)) {
2649                         ext2fs_bg_free_inodes_count_set(fs, group++,
2650                                                         group_free);
2651                         count = 0;
2652                         group_free = 0;
2653                 }
2654         }
2655         fs->super->s_free_inodes_count = total_free;
2656         ext2fs_mark_super_dirty(fs);
2657         return 0;
2658 }
2659
2660 #define list_for_each_safe(pos, pnext, head) \
2661         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2662              pos = pnext, pnext = pos->next)
2663
2664 static void free_blk_move_list(void)
2665 {
2666         struct list_head *entry, *tmp;
2667         struct blk_move *bmv;
2668
2669         list_for_each_safe(entry, tmp, &blk_move_list) {
2670                 bmv = list_entry(entry, struct blk_move, list);
2671                 list_del(entry);
2672                 ext2fs_free_mem(&bmv);
2673         }
2674         return;
2675 }
2676
2677 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2678 {
2679         errcode_t retval;
2680         int new_ino_blks_per_grp;
2681         ext2fs_block_bitmap bmap;
2682
2683         retval = ext2fs_read_inode_bitmap(fs);
2684         if (retval) {
2685                 fputs(_("Failed to read inode bitmap\n"), stderr);
2686                 return retval;
2687         }
2688         retval = ext2fs_read_block_bitmap(fs);
2689         if (retval) {
2690                 fputs(_("Failed to read block bitmap\n"), stderr);
2691                 return retval;
2692         }
2693         INIT_LIST_HEAD(&blk_move_list);
2694
2695
2696         new_ino_blks_per_grp = ext2fs_div_ceil(
2697                                         EXT2_INODES_PER_GROUP(fs->super)*
2698                                         new_size,
2699                                         fs->blocksize);
2700
2701         /* We may change the file system.
2702          * Mark the file system as invalid so that
2703          * the user is prompted to run fsck.
2704          */
2705         fs->super->s_state &= ~EXT2_VALID_FS;
2706
2707         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2708                                                 &bmap);
2709         if (retval) {
2710                 fputs(_("Failed to allocate block bitmap when "
2711                                 "increasing inode size\n"), stderr);
2712                 return retval;
2713         }
2714         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2715         if (retval) {
2716                 fputs(_("Not enough space to increase inode size \n"), stderr);
2717                 goto err_out;
2718         }
2719         retval = move_block(fs, bmap);
2720         if (retval) {
2721                 fputs(_("Failed to relocate blocks during inode resize \n"),
2722                       stderr);
2723                 goto err_out;
2724         }
2725         retval = inode_scan_and_fix(fs, bmap);
2726         if (retval)
2727                 goto err_out_undo;
2728
2729         retval = group_desc_scan_and_fix(fs, bmap);
2730         if (retval)
2731                 goto err_out_undo;
2732
2733         retval = expand_inode_table(fs, new_size);
2734         if (retval)
2735                 goto err_out_undo;
2736
2737         ext2fs_calculate_summary_stats(fs);
2738
2739         fs->super->s_state |= EXT2_VALID_FS;
2740         /* mark super block and block bitmap as dirty */
2741         ext2fs_mark_super_dirty(fs);
2742         ext2fs_mark_bb_dirty(fs);
2743
2744 err_out:
2745         free_blk_move_list();
2746         ext2fs_free_block_bitmap(bmap);
2747
2748         return retval;
2749
2750 err_out_undo:
2751         free_blk_move_list();
2752         ext2fs_free_block_bitmap(bmap);
2753         fputs(_("Error in resizing the inode size.\n"
2754                         "Run e2undo to undo the "
2755                         "file system changes. \n"), stderr);
2756
2757         return retval;
2758 }
2759
2760 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2761 {
2762         errcode_t retval = 0;
2763         const char *tdb_dir;
2764         char *tdb_file = NULL;
2765         char *dev_name, *tmp_name;
2766
2767         /* (re)open a specific undo file */
2768         if (undo_file && undo_file[0] != 0) {
2769                 retval = set_undo_io_backing_manager(*io_ptr);
2770                 if (retval)
2771                         goto err;
2772                 *io_ptr = undo_io_manager;
2773                 retval = set_undo_io_backup_file(undo_file);
2774                 if (retval)
2775                         goto err;
2776                 printf(_("Overwriting existing filesystem; this can be undone "
2777                          "using the command:\n"
2778                          "    e2undo %s %s\n\n"),
2779                          undo_file, name);
2780                 return retval;
2781         }
2782
2783         /*
2784          * Configuration via a conf file would be
2785          * nice
2786          */
2787         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2788         if (!tdb_dir)
2789                 tdb_dir = "/var/lib/e2fsprogs";
2790
2791         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2792             access(tdb_dir, W_OK))
2793                 return 0;
2794
2795         tmp_name = strdup(name);
2796         if (!tmp_name)
2797                 goto errout;
2798         dev_name = basename(tmp_name);
2799         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2800         if (!tdb_file) {
2801                 free(tmp_name);
2802                 goto errout;
2803         }
2804         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2805         free(tmp_name);
2806
2807         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2808                 retval = errno;
2809                 com_err(program_name, retval,
2810                         _("while trying to delete %s"), tdb_file);
2811                 goto errout;
2812         }
2813
2814         retval = set_undo_io_backing_manager(*io_ptr);
2815         if (retval)
2816                 goto errout;
2817         *io_ptr = undo_io_manager;
2818         retval = set_undo_io_backup_file(tdb_file);
2819         if (retval)
2820                 goto errout;
2821         printf(_("Overwriting existing filesystem; this can be undone "
2822                  "using the command:\n"
2823                  "    e2undo %s %s\n\n"),
2824                  tdb_file, name);
2825
2826         free(tdb_file);
2827         return 0;
2828 errout:
2829         free(tdb_file);
2830 err:
2831         com_err("tune2fs", retval, "while trying to setup undo file\n");
2832         return retval;
2833 }
2834
2835 static int
2836 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2837 {
2838         int retval, nr_users, start;
2839         journal_superblock_t *jsb;
2840         ext2_filsys jfs;
2841         __u8 *j_uuid;
2842         char *journal_path;
2843         char uuid[UUID_STR_SIZE];
2844         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2845
2846         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2847                 return 0;
2848
2849         uuid_unparse(sb->s_journal_uuid, uuid);
2850         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2851         if (!journal_path)
2852                 return 0;
2853
2854         retval = ext2fs_open2(journal_path, io_options,
2855                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2856                               0, 0, unix_io_manager, &jfs);
2857         if (retval) {
2858                 com_err(program_name, retval,
2859                         _("while trying to open %s"),
2860                         journal_path);
2861                 return retval;
2862         }
2863
2864         retval = get_journal_sb(jfs, buf);
2865         if (retval != 0) {
2866                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2867                         fprintf(stderr, _("%s is not a journal device.\n"),
2868                                 journal_path);
2869                 return retval;
2870         }
2871
2872         jsb = (journal_superblock_t *) buf;
2873         /* Find the filesystem UUID */
2874         nr_users = ntohl(jsb->s_nr_users);
2875         if (nr_users > JBD2_USERS_MAX) {
2876                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2877                                  "is too high (%d).\n"), nr_users);
2878                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2879         }
2880
2881         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2882         if (j_uuid == NULL) {
2883                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2884                       stderr);
2885                 return EXT2_ET_LOAD_EXT_JOURNAL;
2886         }
2887
2888         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2889
2890         start = ext2fs_journal_sb_start(jfs->blocksize);
2891         /* Write back the journal superblock */
2892         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2893         if (retval != 0) {
2894                 com_err(program_name, retval,
2895                         "while writing journal superblock.");
2896                 return retval;
2897         }
2898
2899         ext2fs_close(jfs);
2900
2901         return 0;
2902 }
2903
2904 #ifndef BUILD_AS_LIB
2905 int main(int argc, char **argv)
2906 #else
2907 int tune2fs_main(int argc, char **argv)
2908 #endif  /* BUILD_AS_LIB */
2909 {
2910         errcode_t retval;
2911         ext2_filsys fs;
2912         struct ext2_super_block *sb;
2913         io_manager io_ptr, io_ptr_orig = NULL;
2914         int rc = 0;
2915         char default_undo_file[1] = { 0 };
2916
2917 #ifdef ENABLE_NLS
2918         setlocale(LC_MESSAGES, "");
2919         setlocale(LC_CTYPE, "");
2920         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2921         textdomain(NLS_CAT_NAME);
2922         set_com_err_gettext(gettext);
2923 #endif
2924         if (argc && *argv)
2925                 program_name = *argv;
2926         add_error_table(&et_ext2_error_table);
2927
2928 #ifdef CONFIG_BUILD_FINDFS
2929         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2930                 do_findfs(argc, argv);
2931 #endif
2932         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2933                 parse_e2label_options(argc, argv);
2934         else
2935                 parse_tune2fs_options(argc, argv);
2936
2937 #ifdef CONFIG_TESTIO_DEBUG
2938         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2939                 io_ptr = test_io_manager;
2940                 test_io_backing_manager = unix_io_manager;
2941         } else
2942 #endif
2943                 io_ptr = unix_io_manager;
2944
2945 retry_open:
2946         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2947                 open_flag |= EXT2_FLAG_SKIP_MMP;
2948
2949         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2950
2951         /* keep the filesystem struct around to dump MMP data */
2952         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2953
2954         retval = ext2fs_open2(device_name, io_options, open_flag,
2955                               0, 0, io_ptr, &fs);
2956         if (retval) {
2957                 com_err(program_name, retval,
2958                         _("while trying to open %s"),
2959                         device_name);
2960                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2961                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2962                         dump_mmp_msg(fs->mmp_buf,
2963                                      _("If you are sure the filesystem "
2964                                        "is not in use on any node, run:\n"
2965                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2966                 else if (retval == EXT2_ET_MMP_FAILED)
2967                         dump_mmp_msg(fs->mmp_buf, NULL);
2968                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2969                         fprintf(stderr,
2970                                 _("MMP block magic is bad. Try to fix it by "
2971                                   "running:\n'e2fsck -f %s'\n"), device_name);
2972                 else if (retval == EXT2_ET_BAD_MAGIC)
2973                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2974                 else if (retval != EXT2_ET_MMP_FAILED)
2975                         fprintf(stderr, "%s",
2976                              _("Couldn't find valid filesystem superblock.\n"));
2977
2978                 ext2fs_free(fs);
2979                 exit(1);
2980         }
2981         if (ext2fs_has_feature_journal_dev(fs->super)) {
2982                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2983                 ext2fs_free(fs);
2984                 exit(1);
2985         }
2986         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2987
2988         if (I_flag) {
2989                 /*
2990                  * Check the inode size is right so we can issue an
2991                  * error message and bail before setting up the tdb
2992                  * file.
2993                  */
2994                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2995                         fprintf(stderr, _("The inode size is already %lu\n"),
2996                                 new_inode_size);
2997                         rc = 1;
2998                         goto closefs;
2999                 }
3000                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3001                         fprintf(stderr, "%s",
3002                                 _("Shrinking inode size is not supported\n"));
3003                         rc = 1;
3004                         goto closefs;
3005                 }
3006                 if (new_inode_size > fs->blocksize) {
3007                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3008                                 new_inode_size, fs->blocksize);
3009                         rc = 1;
3010                         goto closefs;
3011                 }
3012                 check_fsck_needed(fs,
3013                         _("Resizing inodes could take some time."));
3014                 /*
3015                  * If inode resize is requested use the
3016                  * Undo I/O manager
3017                  */
3018                 undo_file = default_undo_file;
3019         }
3020
3021         /* Set up an undo file */
3022         if (undo_file && io_ptr_orig == NULL) {
3023                 io_ptr_orig = io_ptr;
3024                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3025                 if (retval) {
3026                         rc = 1;
3027                         goto closefs;
3028                 }
3029                 if (io_ptr != io_ptr_orig) {
3030                         ext2fs_close_free(&fs);
3031                         goto retry_open;
3032                 }
3033         }
3034
3035         sb = fs->super;
3036         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3037
3038         if (print_label) {
3039                 /* For e2label emulation */
3040                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3041                 remove_error_table(&et_ext2_error_table);
3042                 goto closefs;
3043         }
3044
3045         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3046         if (retval) {
3047                 com_err("ext2fs_check_if_mount", retval,
3048                         _("while determining whether %s is mounted."),
3049                         device_name);
3050                 rc = 1;
3051                 goto closefs;
3052         }
3053
3054 #ifdef NO_RECOVERY
3055         /* Warn if file system needs recovery and it is opened for writing. */
3056         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3057             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3058             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3059                 fprintf(stderr,
3060 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3061   "\te2fsck -E journal_only %s\n\n"
3062   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3063   "by journal recovery.\n"), device_name);
3064         }
3065 #else
3066         /* Recover the journal if possible. */
3067         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3068             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3069                 errcode_t err;
3070
3071                 printf(_("Recovering journal.\n"));
3072                 err = ext2fs_run_ext3_journal(&fs);
3073                 if (err) {
3074                         com_err("tune2fs", err, "while recovering journal.\n");
3075                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3076                         if (fs)
3077                                 ext2fs_close_free(&fs);
3078                         exit(1);
3079                 }
3080                 sb = fs->super;
3081         }
3082 #endif
3083
3084         /* Normally we only need to write out the superblock */
3085         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3086
3087         if (c_flag) {
3088                 sb->s_max_mnt_count = max_mount_count;
3089                 ext2fs_mark_super_dirty(fs);
3090                 printf(_("Setting maximal mount count to %d\n"),
3091                        max_mount_count);
3092         }
3093         if (C_flag) {
3094                 sb->s_mnt_count = mount_count;
3095                 ext2fs_mark_super_dirty(fs);
3096                 printf(_("Setting current mount count to %d\n"), mount_count);
3097         }
3098         if (e_flag) {
3099                 sb->s_errors = errors;
3100                 ext2fs_mark_super_dirty(fs);
3101                 printf(_("Setting error behavior to %d\n"), errors);
3102         }
3103         if (g_flag) {
3104                 sb->s_def_resgid = resgid;
3105                 ext2fs_mark_super_dirty(fs);
3106                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3107         }
3108         if (i_flag) {
3109                 if ((unsigned long long)interval >= (1ULL << 32)) {
3110                         com_err(program_name, 0,
3111                                 _("interval between checks is too big (%lu)"),
3112                                 interval);
3113                         rc = 1;
3114                         goto closefs;
3115                 }
3116                 sb->s_checkinterval = interval;
3117                 ext2fs_mark_super_dirty(fs);
3118                 printf(_("Setting interval between checks to %lu seconds\n"),
3119                        interval);
3120         }
3121         if (m_flag) {
3122                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3123                                           ext2fs_blocks_count(sb) / 100.0);
3124                 ext2fs_mark_super_dirty(fs);
3125                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3126                         reserved_ratio, ext2fs_r_blocks_count(sb));
3127         }
3128         if (r_flag) {
3129                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3130                         com_err(program_name, 0,
3131                                 _("reserved blocks count is too big (%llu)"),
3132                                 reserved_blocks);
3133                         rc = 1;
3134                         goto closefs;
3135                 }
3136                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3137                 ext2fs_mark_super_dirty(fs);
3138                 printf(_("Setting reserved blocks count to %llu\n"),
3139                        reserved_blocks);
3140         }
3141         if (s_flag == 1) {
3142                 if (ext2fs_has_feature_sparse_super(sb)) {
3143                         fputs(_("\nThe filesystem already has sparse "
3144                                 "superblocks.\n"), stderr);
3145                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3146                         fputs(_("\nSetting the sparse superblock flag not "
3147                                 "supported\nfor filesystems with "
3148                                 "the meta_bg feature enabled.\n"),
3149                                 stderr);
3150                         rc = 1;
3151                         goto closefs;
3152                 } else {
3153                         ext2fs_set_feature_sparse_super(sb);
3154                         sb->s_state &= ~EXT2_VALID_FS;
3155                         ext2fs_mark_super_dirty(fs);
3156                         printf(_("\nSparse superblock flag set.  %s"),
3157                                _(please_fsck));
3158                 }
3159         }
3160         if (s_flag == 0) {
3161                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3162                       stderr);
3163                 rc = 1;
3164                 goto closefs;
3165         }
3166         if (T_flag) {
3167                 sb->s_lastcheck = last_check_time;
3168                 ext2fs_mark_super_dirty(fs);
3169                 printf(_("Setting time filesystem last checked to %s\n"),
3170                        ctime(&last_check_time));
3171         }
3172         if (u_flag) {
3173                 sb->s_def_resuid = resuid;
3174                 ext2fs_mark_super_dirty(fs);
3175                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3176         }
3177         if (L_flag) {
3178                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3179                         fputs(_("Warning: label too long, truncating.\n"),
3180                               stderr);
3181                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3182                 strncpy(sb->s_volume_name, new_label,
3183                         sizeof(sb->s_volume_name));
3184                 ext2fs_mark_super_dirty(fs);
3185         }
3186         if (M_flag) {
3187                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3188                 strncpy(sb->s_last_mounted, new_last_mounted,
3189                         sizeof(sb->s_last_mounted));
3190                 ext2fs_mark_super_dirty(fs);
3191         }
3192         if (mntopts_cmd) {
3193                 rc = update_mntopts(fs, mntopts_cmd);
3194                 if (rc)
3195                         goto closefs;
3196         }
3197         if (features_cmd) {
3198                 rc = update_feature_set(fs, features_cmd);
3199                 if (rc)
3200                         goto closefs;
3201         }
3202         if (extended_cmd) {
3203                 rc = parse_extended_opts(fs, extended_cmd);
3204                 if (rc)
3205                         goto closefs;
3206                 if (clear_mmp && !f_flag) {
3207                         fputs(_("Error in using clear_mmp. "
3208                                 "It must be used with -f\n"),
3209                               stderr);
3210                         goto closefs;
3211                 }
3212         }
3213         if (clear_mmp) {
3214                 rc = ext2fs_mmp_clear(fs);
3215                 goto closefs;
3216         }
3217         if (journal_size || journal_device) {
3218                 rc = add_journal(fs);
3219                 if (rc)
3220                         goto closefs;
3221         }
3222
3223         if (Q_flag) {
3224                 if (mount_flags & EXT2_MF_MOUNTED) {
3225                         fputs(_("The quota feature may only be changed when "
3226                                 "the filesystem is unmounted.\n"), stderr);
3227                         rc = 1;
3228                         goto closefs;
3229                 }
3230                 handle_quota_options(fs);
3231         }
3232
3233         if (U_flag) {
3234                 int set_csum = 0;
3235                 dgrp_t i;
3236                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3237                 __u8 old_uuid[UUID_SIZE];
3238
3239                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3240                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3241                      ext2fs_has_feature_ea_inode(fs->super))) {
3242                         check_fsck_needed(fs,
3243                                 _("Setting the UUID on this "
3244                                   "filesystem could take some time."));
3245                         rewrite_checksums = REWRITE_ALL;
3246                 }
3247
3248                 if (ext2fs_has_group_desc_csum(fs)) {
3249                         /*
3250                          * Changing the UUID on a metadata_csum FS requires
3251                          * rewriting all metadata, which can race with a
3252                          * mounted fs.  Don't allow that unless we're saving
3253                          * the checksum seed.
3254                          */
3255                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3256                             !ext2fs_has_feature_csum_seed(fs->super) &&
3257                             ext2fs_has_feature_metadata_csum(fs->super)) {
3258                                 fputs(_("The UUID may only be "
3259                                         "changed when the filesystem is "
3260                                         "unmounted.\n"), stderr);
3261                                 fputs(_("If you only use kernels newer than "
3262                                         "v4.4, run 'tune2fs -O "
3263                                         "metadata_csum_seed' and re-run this "
3264                                         "command.\n"), stderr);
3265                                 try_confirm_csum_seed_support();
3266                                 exit(1);
3267                         }
3268
3269                         /*
3270                          * Determine if the block group checksums are
3271                          * correct so we know whether or not to set
3272                          * them later on.
3273                          */
3274                         for (i = 0; i < fs->group_desc_count; i++)
3275                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3276                                         break;
3277                         if (i >= fs->group_desc_count)
3278                                 set_csum = 1;
3279                 }
3280
3281                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3282                 if ((strcasecmp(new_UUID, "null") == 0) ||
3283                     (strcasecmp(new_UUID, "clear") == 0)) {
3284                         uuid_clear(sb->s_uuid);
3285                 } else if (strcasecmp(new_UUID, "time") == 0) {
3286                         uuid_generate_time(sb->s_uuid);
3287                 } else if (strcasecmp(new_UUID, "random") == 0) {
3288                         uuid_generate(sb->s_uuid);
3289                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3290                         com_err(program_name, 0, "%s",
3291                                 _("Invalid UUID format\n"));
3292                         rc = 1;
3293                         goto closefs;
3294                 }
3295                 ext2fs_init_csum_seed(fs);
3296                 if (set_csum) {
3297                         for (i = 0; i < fs->group_desc_count; i++)
3298                                 ext2fs_group_desc_csum_set(fs, i);
3299                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3300                 }
3301
3302                 /* If this is a journal dev, we need to copy UUID into jsb */
3303                 if (!(rc = get_journal_sb(fs, buf))) {
3304                         journal_superblock_t *jsb;
3305
3306                         jsb = (journal_superblock_t *) buf;
3307                         fputs(_("Need to update journal superblock.\n"), stdout);
3308                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3309
3310                         /* Writeback the journal superblock */
3311                         if ((rc = io_channel_write_blk64(fs->io,
3312                                 ext2fs_journal_sb_start(fs->blocksize),
3313                                         -SUPERBLOCK_SIZE, buf)))
3314                                 goto closefs;
3315                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3316                         goto closefs;
3317                 else {
3318                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3319
3320                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3321                                 goto closefs;
3322                 }
3323
3324                 ext2fs_mark_super_dirty(fs);
3325         }
3326
3327         if (I_flag) {
3328                 if (mount_flags & EXT2_MF_MOUNTED) {
3329                         fputs(_("The inode size may only be "
3330                                 "changed when the filesystem is "
3331                                 "unmounted.\n"), stderr);
3332                         rc = 1;
3333                         goto closefs;
3334                 }
3335                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3336                         fputs(_("Changing the inode size not supported for "
3337                                 "filesystems with the flex_bg\n"
3338                                 "feature enabled.\n"),
3339                               stderr);
3340                         rc = 1;
3341                         goto closefs;
3342                 }
3343                 /*
3344                  * We want to update group descriptor also
3345                  * with the new free inode count
3346                  */
3347                 if (rewrite_checksums)
3348                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3349                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3350                 retval = resize_inode(fs, new_inode_size);
3351                 if (rewrite_checksums)
3352                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3353                 if (retval == 0) {
3354                         printf(_("Setting inode size %lu\n"),
3355                                                         new_inode_size);
3356                         rewrite_checksums = REWRITE_ALL;
3357                 } else {
3358                         printf("%s", _("Failed to change inode size\n"));
3359                         rc = 1;
3360                         goto closefs;
3361                 }
3362         }
3363
3364         if (rewrite_checksums)
3365                 rewrite_metadata_checksums(fs, rewrite_checksums);
3366
3367         if (l_flag)
3368                 list_super(sb);
3369         if (stride_set) {
3370                 sb->s_raid_stride = stride;
3371                 ext2fs_mark_super_dirty(fs);
3372                 printf(_("Setting stride size to %d\n"), stride);
3373         }
3374         if (stripe_width_set) {
3375                 sb->s_raid_stripe_width = stripe_width;
3376                 ext2fs_mark_super_dirty(fs);
3377                 printf(_("Setting stripe width to %d\n"), stripe_width);
3378         }
3379         if (ext_mount_opts) {
3380                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3381                         sizeof(fs->super->s_mount_opts));
3382                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3383                 ext2fs_mark_super_dirty(fs);
3384                 printf(_("Setting extended default mount options to '%s'\n"),
3385                        ext_mount_opts);
3386                 free(ext_mount_opts);
3387         }
3388
3389         free(device_name);
3390         remove_error_table(&et_ext2_error_table);
3391
3392 closefs:
3393         if (rc) {
3394                 ext2fs_mmp_stop(fs);
3395 #ifndef BUILD_AS_LIB
3396                 exit(1);
3397 #endif
3398         }
3399
3400         if (feature_64bit)
3401                 convert_64bit(fs, feature_64bit);
3402         return (ext2fs_close_free(&fs) ? 1 : 0);
3403 }