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