misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104 int enabling_casefold;
 105
 106 int journal_size, journal_fc_size, journal_flags;
 107 char *journal_device;
 108 static blk64_t journal_location = ~0LL;
 109
 110 static struct list_head blk_move_list;
 111
 112 struct blk_move {
 113         struct list_head list;
 114         blk64_t old_loc;
 115         blk64_t new_loc;
 116 };
 117
 118 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 119
 120 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 121
 122 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 123 static const char *please_dir_fsck =
 124                 N_("Please run e2fsck -fD on the filesystem.\n");
 125
 126 #ifdef CONFIG_BUILD_FINDFS
 127 void do_findfs(int argc, char **argv);
 128 #endif
 129
 130 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 131 int journal_enable_debug = -1;
 132 #endif
 133
 134 static void usage(void)
 135 {
 136         fprintf(stderr,
 137                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 138                   "[-g group]\n"
 139                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 140                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 141                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 142                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 143                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 144                   "\t[-E extended-option[,...]] [-T last_check_time] "
 145                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 146                 program_name);
 147         exit(1);
 148 }
 149
 150 static __u32 ok_features[3] = {
 151         /* Compat */
 152         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 153                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 154                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 155                 EXT4_FEATURE_COMPAT_STABLE_INODES,
 156         /* Incompat */
 157         EXT2_FEATURE_INCOMPAT_FILETYPE |
 158                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 159                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 160                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 161                 EXT4_FEATURE_INCOMPAT_MMP |
 162                 EXT4_FEATURE_INCOMPAT_DIRDATA |
 163                 EXT4_FEATURE_INCOMPAT_64BIT |
 164                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 165                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 166                 EXT4_FEATURE_INCOMPAT_LARGEDIR |
 167                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 168         /* R/O compat */
 169         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 170                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 171                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 172                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 173                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 174                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 175                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 176                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 177                 EXT4_FEATURE_RO_COMPAT_READONLY |
 178                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 179                 EXT4_FEATURE_RO_COMPAT_VERITY
 180 };
 181
 182 static __u32 clear_ok_features[3] = {
 183         /* Compat */
 184         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 185                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 186                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 187                 EXT4_FEATURE_COMPAT_FAST_COMMIT,
 188         /* Incompat */
 189         EXT2_FEATURE_INCOMPAT_FILETYPE |
 190                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 191                 EXT4_FEATURE_INCOMPAT_MMP |
 192                 EXT4_FEATURE_INCOMPAT_DIRDATA |
 193                 EXT4_FEATURE_INCOMPAT_64BIT |
 194                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 195         /* R/O compat */
 196         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 197                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 198                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 199                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 200                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 201                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 202                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 203                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 204                 EXT4_FEATURE_RO_COMPAT_READONLY
 205 };
 206
 207 /**
 208  * Try to get journal super block if any
 209  */
 210 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 211 {
 212         int retval;
 213         journal_superblock_t *jsb;
 214
 215         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 216                 return EXT2_ET_UNSUPP_FEATURE;
 217         }
 218
 219         /* Get the journal superblock */
 220         if ((retval = io_channel_read_blk64(jfs->io,
 221             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 222                 com_err(program_name, retval, "%s",
 223                 _("while reading journal superblock"));
 224                 return retval;
 225         }
 226
 227         jsb = (journal_superblock_t *) buf;
 228         if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
 229             (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
 230                 fputs(_("Journal superblock not found!\n"), stderr);
 231                 return EXT2_ET_BAD_MAGIC;
 232         }
 233
 234         return 0;
 235 }
 236
 237 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
 238                           int nr_users)
 239 {
 240         int i;
 241         for (i = 0; i < nr_users; i++) {
 242                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 243                         return &s_users[i * UUID_SIZE];
 244         }
 245
 246         return NULL;
 247 }
 248
 249 /*
 250  * Remove an external journal from the filesystem
 251  */
 252 static int remove_journal_device(ext2_filsys fs)
 253 {
 254         char            *journal_path;
 255         ext2_filsys     jfs;
 256         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 257         journal_superblock_t    *jsb;
 258         int             i, nr_users;
 259         errcode_t       retval;
 260         int             commit_remove_journal = 0;
 261         io_manager      io_ptr;
 262
 263         if (f_flag)
 264                 commit_remove_journal = 1; /* force removal even if error */
 265
 266         uuid_unparse(fs->super->s_journal_uuid, buf);
 267         journal_path = blkid_get_devname(NULL, "UUID", buf);
 268
 269         if (!journal_path) {
 270                 journal_path =
 271                         ext2fs_find_block_device(fs->super->s_journal_dev);
 272                 if (!journal_path)
 273                         goto no_valid_journal;
 274         }
 275
 276 #ifdef CONFIG_TESTIO_DEBUG
 277         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 278                 io_ptr = test_io_manager;
 279                 test_io_backing_manager = unix_io_manager;
 280         } else
 281 #endif
 282                 io_ptr = unix_io_manager;
 283         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 284                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 285                              fs->blocksize, io_ptr, &jfs);
 286         if (retval) {
 287                 com_err(program_name, retval, "%s",
 288                         _("while trying to open external journal"));
 289                 goto no_valid_journal;
 290         }
 291
 292         if ((retval = get_journal_sb(jfs, buf))) {
 293                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 294                         fprintf(stderr, _("%s is not a journal device.\n"),
 295                                 journal_path);
 296                 goto no_valid_journal;
 297         }
 298
 299         jsb = (journal_superblock_t *) buf;
 300         /* Find the filesystem UUID */
 301         nr_users = ntohl(jsb->s_nr_users);
 302         if (nr_users > JBD2_USERS_MAX) {
 303                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 304                                  "is too high (%d).\n"), nr_users);
 305                 commit_remove_journal = 1;
 306                 goto no_valid_journal;
 307         }
 308
 309         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 310                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 311                       stderr);
 312                 commit_remove_journal = 1;
 313                 goto no_valid_journal;
 314         }
 315         nr_users--;
 316         for (i = 0; i < nr_users; i++)
 317                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 318         jsb->s_nr_users = htonl(nr_users);
 319
 320         /* Write back the journal superblock */
 321         retval = io_channel_write_blk64(jfs->io,
 322                                         ext2fs_journal_sb_start(fs->blocksize),
 323                                         -SUPERBLOCK_SIZE, buf);
 324         if (retval) {
 325                 com_err(program_name, retval,
 326                         "while writing journal superblock.");
 327                 goto no_valid_journal;
 328         }
 329
 330         commit_remove_journal = 1;
 331
 332 no_valid_journal:
 333         if (commit_remove_journal == 0) {
 334                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 335                         "Use -f option to remove missing journal device.\n"),
 336                       stderr);
 337                 return 1;
 338         }
 339         fs->super->s_journal_dev = 0;
 340         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 341         uuid_clear(fs->super->s_journal_uuid);
 342         ext2fs_mark_super_dirty(fs);
 343         fputs(_("Journal removed\n"), stdout);
 344         free(journal_path);
 345
 346         return 0;
 347 }
 348
 349 /* Helper function for remove_journal_inode */
 350 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 351                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 352                                blk64_t ref_block EXT2FS_ATTR((unused)),
 353                                int ref_offset EXT2FS_ATTR((unused)),
 354                                void *private EXT2FS_ATTR((unused)))
 355 {
 356         blk64_t block;
 357         int     group;
 358
 359         block = *blocknr;
 360         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 361         group = ext2fs_group_of_blk2(fs, block);
 362         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 363         ext2fs_group_desc_csum_set(fs, group);
 364         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 365         return 0;
 366 }
 367
 368 /*
 369  * Remove the journal inode from the filesystem
 370  */
 371 static errcode_t remove_journal_inode(ext2_filsys fs)
 372 {
 373         struct ext2_inode       inode;
 374         errcode_t               retval;
 375         ext2_ino_t              ino = fs->super->s_journal_inum;
 376
 377         retval = ext2fs_read_inode(fs, ino,  &inode);
 378         if (retval) {
 379                 com_err(program_name, retval, "%s",
 380                         _("while reading journal inode"));
 381                 return retval;
 382         }
 383         if (ino == EXT2_JOURNAL_INO) {
 384                 retval = ext2fs_read_bitmaps(fs);
 385                 if (retval) {
 386                         com_err(program_name, retval, "%s",
 387                                 _("while reading bitmaps"));
 388                         return retval;
 389                 }
 390                 retval = ext2fs_block_iterate3(fs, ino,
 391                                                BLOCK_FLAG_READ_ONLY, NULL,
 392                                                release_blocks_proc, NULL);
 393                 if (retval) {
 394                         com_err(program_name, retval, "%s",
 395                                 _("while clearing journal inode"));
 396                         return retval;
 397                 }
 398                 memset(&inode, 0, sizeof(inode));
 399                 ext2fs_mark_bb_dirty(fs);
 400                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 401         } else
 402                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 403         retval = ext2fs_write_inode(fs, ino, &inode);
 404         if (retval) {
 405                 com_err(program_name, retval, "%s",
 406                         _("while writing journal inode"));
 407                 return retval;
 408         }
 409         fs->super->s_journal_inum = 0;
 410         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 411         ext2fs_mark_super_dirty(fs);
 412
 413         return 0;
 414 }
 415
 416 /*
 417  * Update the default mount options
 418  */
 419 static int update_mntopts(ext2_filsys fs, char *mntopts)
 420 {
 421         struct ext2_super_block *sb = fs->super;
 422
 423         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 424                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 425                         mntopts);
 426                 return 1;
 427         }
 428         ext2fs_mark_super_dirty(fs);
 429
 430         return 0;
 431 }
 432
 433 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 434 {
 435         /* Refuse to modify anything but a freshly checked valid filesystem. */
 436         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 437             (fs->super->s_state & EXT2_ERROR_FS) ||
 438             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 439                 puts(_(fsck_explain));
 440                 puts(_(please_fsck));
 441                 if (mount_flags & EXT2_MF_READONLY)
 442                         printf("%s", _("(and reboot afterwards!)\n"));
 443                 return 1;
 444         }
 445
 446         /* Give the admin a few seconds to bail out of a dangerous op. */
 447         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 448                 return 0;
 449
 450         puts(prompt);
 451         proceed_question(5);
 452
 453         return 0;
 454 }
 455
 456 static void request_dir_fsck_afterwards(ext2_filsys fs)
 457 {
 458         static int requested;
 459
 460         if (requested++)
 461                 return;
 462         fsck_requested++;
 463         fs->super->s_state &= ~EXT2_VALID_FS;
 464         puts(_(fsck_explain));
 465         puts(_(please_dir_fsck));
 466         if (mount_flags & EXT2_MF_READONLY)
 467                 printf("%s", _("(and reboot afterwards!)\n"));
 468 }
 469
 470 static void request_fsck_afterwards(ext2_filsys fs)
 471 {
 472         static int requested = 0;
 473
 474         if (requested++)
 475                 return;
 476         fsck_requested++;
 477         fs->super->s_state &= ~EXT2_VALID_FS;
 478         printf("\n%s\n", _(please_fsck));
 479         if (mount_flags & EXT2_MF_READONLY)
 480                 printf("%s", _("(and reboot afterwards!)\n"));
 481 }
 482
 483 static void convert_64bit(ext2_filsys fs, int direction)
 484 {
 485         /*
 486          * Is resize2fs going to demand a fsck run? Might as well tell the
 487          * user now.
 488          */
 489         if (!fsck_requested &&
 490             ((fs->super->s_state & EXT2_ERROR_FS) ||
 491              !(fs->super->s_state & EXT2_VALID_FS) ||
 492              fs->super->s_lastcheck < fs->super->s_mtime))
 493                 request_fsck_afterwards(fs);
 494         if (fsck_requested)
 495                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 496                         direction > 0 ? "-b" : "-s", fs->device_name);
 497         else
 498                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 499                         direction > 0 ? "-b" : "-s", fs->device_name);
 500
 501         if (undo_file)
 502                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 503         if (direction > 0)
 504                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 505         else
 506                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 507 }
 508
 509 /*
 510  * Rewrite directory blocks with checksums
 511  */
 512 struct rewrite_dir_context {
 513         char *buf;
 514         errcode_t errcode;
 515         ext2_ino_t dir;
 516         int is_htree:1;
 517         int clear_htree:1;
 518 };
 519
 520 static int rewrite_dir_block(ext2_filsys fs,
 521                              blk64_t    *blocknr,
 522                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 523                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 524                              int        ref_offset EXT2FS_ATTR((unused)),
 525                              void       *priv_data)
 526 {
 527         struct ext2_dx_countlimit *dcl = NULL;
 528         struct rewrite_dir_context *ctx = priv_data;
 529         int dcl_offset, changed = 0;
 530
 531         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 532                                               ctx->dir);
 533         if (ctx->errcode)
 534                 return BLOCK_ABORT;
 535
 536         /*
 537          * if htree node... Note that if we are clearing htree structures from
 538          * the directory, we treat the htree internal block as an ordinary leaf.
 539          * The code below will do the right thing and make space for checksum
 540          * there.
 541          */
 542         if (ctx->is_htree && !ctx->clear_htree)
 543                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 544                                          &dcl, &dcl_offset);
 545         if (dcl) {
 546                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 547                         /* Ensure limit is the max size */
 548                         int max_entries = (fs->blocksize - dcl_offset) /
 549                                           sizeof(struct ext2_dx_entry);
 550                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 551                                 changed = 1;
 552                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 553                         }
 554                 } else {
 555                         /* If htree block is full then rebuild the dir */
 556                         if (ext2fs_le16_to_cpu(dcl->count) ==
 557                             ext2fs_le16_to_cpu(dcl->limit)) {
 558                                 request_dir_fsck_afterwards(fs);
 559                                 return 0;
 560                         }
 561                         /*
 562                          * Ensure dcl->limit is small enough to leave room for
 563                          * the checksum tail.
 564                          */
 565                         int max_entries = (fs->blocksize - (dcl_offset +
 566                                                 sizeof(struct ext2_dx_tail))) /
 567                                           sizeof(struct ext2_dx_entry);
 568                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 569                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 570                         /* Always rewrite checksum */
 571                         changed = 1;
 572                 }
 573         } else {
 574                 unsigned int rec_len, name_size;
 575                 char *top = ctx->buf + fs->blocksize;
 576                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 577                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 578
 579                 /* Find last and penultimate dirent */
 580                 while ((char *)de < top) {
 581                         penultimate_de = last_de;
 582                         last_de = de;
 583                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 584                         if (!ctx->errcode && !rec_len)
 585                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 586                         if (ctx->errcode)
 587                                 return BLOCK_ABORT;
 588                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 589                 }
 590                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 591                 if (ctx->errcode)
 592                         return BLOCK_ABORT;
 593                 name_size = ext2fs_dirent_name_len(last_de);
 594
 595                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 596                         if (!penultimate_de)
 597                                 return 0;
 598                         if (last_de->inode ||
 599                             name_size ||
 600                             rec_len != sizeof(struct ext2_dir_entry_tail))
 601                                 return 0;
 602                         /*
 603                          * The last dirent is unused and the right length to
 604                          * have stored a checksum.  Erase it.
 605                          */
 606                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 607                                                           &rec_len);
 608                         if (!rec_len)
 609                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 610                         if (ctx->errcode)
 611                                 return BLOCK_ABORT;
 612                         ext2fs_set_rec_len(fs, rec_len +
 613                                         sizeof(struct ext2_dir_entry_tail),
 614                                         penultimate_de);
 615                         changed = 1;
 616                 } else {
 617                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 618                         struct ext2_dir_entry_tail *t;
 619
 620                         /*
 621                          * If the last dirent looks like the tail, just update
 622                          * the checksum.
 623                          */
 624                         if (!last_de->inode &&
 625                             rec_len == csum_size) {
 626                                 t = (struct ext2_dir_entry_tail *)last_de;
 627                                 t->det_reserved_name_len =
 628                                                 EXT2_DIR_NAME_LEN_CSUM;
 629                                 changed = 1;
 630                                 goto out;
 631                         }
 632                         if (name_size & 3)
 633                                 name_size = (name_size & ~3) + 4;
 634                         /* If there's not enough space for the tail, e2fsck */
 635                         if (rec_len <= (8 + name_size + csum_size)) {
 636                                 request_dir_fsck_afterwards(fs);
 637                                 return 0;
 638                         }
 639                         /* Shorten that last de and insert the tail */
 640                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 641                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 642                         ext2fs_initialize_dirent_tail(fs, t);
 643
 644                         /* Always update checksum */
 645                         changed = 1;
 646                 }
 647         }
 648
 649 out:
 650         if (!changed)
 651                 return 0;
 652
 653         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 654                                                0, ctx->dir);
 655         if (ctx->errcode)
 656                 return BLOCK_ABORT;
 657
 658         return 0;
 659 }
 660
 661 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 662                                    struct ext2_inode *inode)
 663 {
 664         errcode_t       retval;
 665         struct rewrite_dir_context ctx;
 666
 667         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 668         if (retval)
 669                 return retval;
 670
 671         ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
 672         ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
 673         ctx.dir = dir;
 674         ctx.errcode = 0;
 675         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 676                                                 BLOCK_FLAG_DATA_ONLY,
 677                                        0, rewrite_dir_block, &ctx);
 678
 679         ext2fs_free_mem(&ctx.buf);
 680         if (retval)
 681                 return retval;
 682
 683         if (ctx.is_htree && ctx.clear_htree) {
 684                 inode->i_flags &= ~EXT2_INDEX_FL;
 685                 retval = ext2fs_write_inode(fs, dir, inode);
 686                 if (retval)
 687                         return retval;
 688         }
 689
 690         return ctx.errcode;
 691 }
 692
 693 /*
 694  * Context information that does not change across rewrite_one_inode()
 695  * invocations.
 696  */
 697 struct rewrite_context {
 698         ext2_filsys fs;
 699         struct ext2_inode *zero_inode;
 700         char *ea_buf;
 701         int inode_size;
 702 };
 703
 704 #define fatal_err(code, args...)                \
 705         do {                                    \
 706                 com_err(__func__, code, args);  \
 707                 exit(1);                        \
 708         } while (0);
 709
 710 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 711                                  struct ext2_inode *inode)
 712 {
 713         errcode_t retval;
 714         ext2_file_t file;
 715         __u32 hash;
 716
 717         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 718         if (retval)
 719                 fatal_err(retval, "open ea_inode");
 720         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 721                                   NULL);
 722         if (retval)
 723                 fatal_err(retval, "read ea_inode");
 724         retval = ext2fs_file_close(file);
 725         if (retval)
 726                 fatal_err(retval, "close ea_inode");
 727
 728         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 729                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 730         ext2fs_set_ea_inode_hash(inode, hash);
 731 }
 732
 733 static int update_xattr_entry_hashes(ext2_filsys fs,
 734                                      struct ext2_ext_attr_entry *entry,
 735                                      struct ext2_ext_attr_entry *end)
 736 {
 737         int modified = 0;
 738         errcode_t retval;
 739
 740         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 741                 if (entry->e_value_inum) {
 742                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 743                                                              &entry->e_hash);
 744                         if (retval)
 745                                 fatal_err(retval, "hash ea_inode entry");
 746                         modified = 1;
 747                 }
 748                 entry = EXT2_EXT_ATTR_NEXT(entry);
 749         }
 750         return modified;
 751 }
 752
 753 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 754                                        struct ext2_inode_large *inode)
 755 {
 756         struct ext2_ext_attr_entry *start, *end;
 757         __u32 *ea_magic;
 758
 759         if (inode->i_extra_isize == 0)
 760                 return;
 761
 762         if (inode->i_extra_isize & 3 ||
 763             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 764                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 765
 766         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 767                                 inode->i_extra_isize);
 768         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 769                 return;
 770
 771         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 772         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 773
 774         update_xattr_entry_hashes(ctx->fs, start, end);
 775 }
 776
 777 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 778                                       char *block_buf)
 779 {
 780         struct ext2_ext_attr_header *header;
 781         struct ext2_ext_attr_entry *start, *end;
 782
 783         header = (struct ext2_ext_attr_header *)block_buf;
 784         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 785                 return;
 786
 787         start = (struct ext2_ext_attr_entry *)(header+1);
 788         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 789
 790         if (update_xattr_entry_hashes(ctx->fs, start, end))
 791                 ext2fs_ext_attr_block_rehash(header, end);
 792 }
 793
 794 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 795                               struct ext2_inode *inode)
 796 {
 797         blk64_t file_acl_block;
 798         errcode_t retval;
 799
 800         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 801                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 802                         return;
 803                 memset(inode, 0, ctx->inode_size);
 804         }
 805
 806         if (inode->i_flags & EXT4_EA_INODE_FL)
 807                 update_ea_inode_hash(ctx, ino, inode);
 808
 809         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 810                 update_inline_xattr_hashes(ctx,
 811                                            (struct ext2_inode_large *)inode);
 812
 813         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 814         if (retval)
 815                 fatal_err(retval, "while writing inode");
 816
 817         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 818         if (retval)
 819                 fatal_err(retval, "while rewriting extents");
 820
 821         if (LINUX_S_ISDIR(inode->i_mode) &&
 822             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 823                 retval = rewrite_directory(ctx->fs, ino, inode);
 824                 if (retval)
 825                         fatal_err(retval, "while rewriting directories");
 826         }
 827
 828         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 829         if (!file_acl_block)
 830                 return;
 831
 832         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 833                                        ino);
 834         if (retval)
 835                 fatal_err(retval, "while rewriting extended attribute");
 836
 837         update_block_xattr_hashes(ctx, ctx->ea_buf);
 838         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 839                                         ino);
 840         if (retval)
 841                 fatal_err(retval, "while rewriting extended attribute");
 842 }
 843
 844 #define REWRITE_EA_FL           0x01    /* Rewrite EA inodes */
 845 #define REWRITE_DIR_FL          0x02    /* Rewrite directories */
 846 #define REWRITE_NONDIR_FL       0x04    /* Rewrite other inodes */
 847 #define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
 848
 849 static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
 850 {
 851         ext2_inode_scan scan;
 852         errcode_t       retval;
 853         ext2_ino_t      ino;
 854         struct ext2_inode *inode;
 855         int rewrite;
 856
 857         retval = ext2fs_get_mem(ctx->inode_size, &inode);
 858         if (retval)
 859                 fatal_err(retval, "while allocating memory");
 860
 861         retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
 862         if (retval)
 863                 fatal_err(retval, "while opening inode scan");
 864
 865         do {
 866                 retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 867                                                     ctx->inode_size);
 868                 if (retval)
 869                         fatal_err(retval, "while getting next inode");
 870                 if (!ino)
 871                         break;
 872
 873                 rewrite = 0;
 874                 if (inode->i_flags & EXT4_EA_INODE_FL) {
 875                         if (flags & REWRITE_EA_FL)
 876                                 rewrite = 1;
 877                 } else if (LINUX_S_ISDIR(inode->i_mode)) {
 878                         if (flags & REWRITE_DIR_FL)
 879                                 rewrite = 1;
 880                 } else {
 881                         if (flags & REWRITE_NONDIR_FL)
 882                                 rewrite = 1;
 883                 }
 884                 if (rewrite)
 885                         rewrite_one_inode(ctx, ino, inode);
 886         } while (ino);
 887         ext2fs_close_inode_scan(scan);
 888         ext2fs_free_mem(&inode);
 889 }
 890
 891 /*
 892  * Forcibly rewrite checksums in inodes specified by 'flags'
 893  */
 894 static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
 895 {
 896         struct rewrite_context ctx = {
 897                 .fs = fs,
 898                 .inode_size = EXT2_INODE_SIZE(fs->super),
 899         };
 900         errcode_t retval;
 901
 902         if (fs->super->s_creator_os == EXT2_OS_HURD)
 903                 return;
 904
 905         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 906         if (retval)
 907                 fatal_err(retval, "while allocating memory");
 908
 909         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 910         if (retval)
 911                 fatal_err(retval, "while allocating memory");
 912
 913         /*
 914          * Extended attribute inodes have a lookup hash that needs to be
 915          * recalculated with the new csum_seed. Other inodes referencing xattr
 916          * inodes need this value to be up to date. That's why we do two passes:
 917          *
 918          * pass 1: update xattr inodes to update their lookup hash as well as
 919          *         other checksums.
 920          *
 921          * pass 2: go over other inodes to update their checksums.
 922          */
 923         if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
 924                 rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
 925         flags &= ~REWRITE_EA_FL;
 926         rewrite_inodes_pass(&ctx, flags);
 927
 928         ext2fs_free_mem(&ctx.zero_inode);
 929         ext2fs_free_mem(&ctx.ea_buf);
 930 }
 931
 932 static void rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 933 {
 934         errcode_t retval;
 935         dgrp_t i;
 936
 937         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 938         ext2fs_init_csum_seed(fs);
 939         for (i = 0; i < fs->group_desc_count; i++)
 940                 ext2fs_group_desc_csum_set(fs, i);
 941         retval = ext2fs_read_bitmaps(fs);
 942         if (retval)
 943                 fatal_err(retval, "while reading bitmaps");
 944         rewrite_inodes(fs, flags);
 945         ext2fs_mark_ib_dirty(fs);
 946         ext2fs_mark_bb_dirty(fs);
 947         ext2fs_mmp_update2(fs, 1);
 948         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 949         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 950         if (ext2fs_has_feature_metadata_csum(fs->super))
 951                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 952         else
 953                 fs->super->s_checksum_type = 0;
 954         ext2fs_mark_super_dirty(fs);
 955 }
 956
 957 static void enable_uninit_bg(ext2_filsys fs)
 958 {
 959         struct ext2_group_desc *gd;
 960         dgrp_t i;
 961
 962         for (i = 0; i < fs->group_desc_count; i++) {
 963                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 964                 gd->bg_itable_unused = 0;
 965                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 966                 ext2fs_group_desc_csum_set(fs, i);
 967         }
 968         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 969 }
 970
 971 static errcode_t zero_empty_inodes(ext2_filsys fs)
 972 {
 973         int length = EXT2_INODE_SIZE(fs->super);
 974         struct ext2_inode *inode = NULL;
 975         ext2_inode_scan scan;
 976         errcode_t       retval;
 977         ext2_ino_t      ino;
 978
 979         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 980         if (retval)
 981                 goto out;
 982
 983         retval = ext2fs_get_mem(length, &inode);
 984         if (retval)
 985                 goto out;
 986
 987         do {
 988                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 989                 if (retval)
 990                         goto out;
 991                 if (!ino)
 992                         break;
 993                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 994                         memset(inode, 0, length);
 995                         retval = ext2fs_write_inode_full(fs, ino, inode,
 996                                                          length);
 997                         if (retval)
 998                                 goto out;
 999                 }
1000         } while (1);
1001
1002 out:
1003         ext2fs_free_mem(&inode);
1004         ext2fs_close_inode_scan(scan);
1005         return retval;
1006 }
1007
1008 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1009 {
1010         struct ext2_group_desc *gd;
1011         dgrp_t i;
1012         errcode_t retval;
1013         blk64_t b, c, d;
1014
1015         /* Load bitmaps to ensure that the uninit ones get written out */
1016         fs->super->s_feature_ro_compat |= csum_feature_flag;
1017         retval = ext2fs_read_bitmaps(fs);
1018         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1019         if (retval) {
1020                 com_err("disable_uninit_bg", retval,
1021                         "while reading bitmaps");
1022                 request_fsck_afterwards(fs);
1023                 return retval;
1024         }
1025         ext2fs_mark_ib_dirty(fs);
1026         ext2fs_mark_bb_dirty(fs);
1027
1028         /* If we're only turning off uninit_bg, zero the inodes */
1029         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1030                 retval = zero_empty_inodes(fs);
1031                 if (retval) {
1032                         com_err("disable_uninit_bg", retval,
1033                                 "while zeroing unused inodes");
1034                         request_fsck_afterwards(fs);
1035                         return retval;
1036                 }
1037         }
1038
1039         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1040         for (i = 0; i < fs->group_desc_count; i++) {
1041                 b = ext2fs_block_bitmap_loc(fs, i);
1042                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1043                 b = ext2fs_inode_bitmap_loc(fs, i);
1044                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1045
1046                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1047                 if (retval == 0 && b)
1048                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1049                 if (retval == 0 && c)
1050                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1051                 if (retval == 0 && d)
1052                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1053                 if (retval) {
1054                         com_err("disable_uninit_bg", retval,
1055                                 "while initializing block bitmaps");
1056                         request_fsck_afterwards(fs);
1057                 }
1058
1059                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1060                 gd->bg_itable_unused = 0;
1061                 gd->bg_flags = 0;
1062                 ext2fs_group_desc_csum_set(fs, i);
1063         }
1064         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1065         ext2fs_mark_super_dirty(fs);
1066
1067         return 0;
1068 }
1069
1070 static void
1071 try_confirm_csum_seed_support(void)
1072 {
1073         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1074                 fputs(_("WARNING: Could not confirm kernel support for "
1075                         "metadata_csum_seed.\n  This requires Linux >= "
1076                         "v4.4.\n"), stderr);
1077 }
1078
1079 /*
1080  * Update the feature set as provided by the user.
1081  */
1082 static int update_feature_set(ext2_filsys fs, char *features)
1083 {
1084         struct ext2_super_block *sb = fs->super;
1085         __u32           old_features[3];
1086         int             type_err;
1087         unsigned int    mask_err;
1088         errcode_t       err;
1089         enum quota_type qtype;
1090
1091 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1092                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1093 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1094                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1095 #define FEATURE_CHANGED(type, mask) ((mask) & \
1096                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1097
1098         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1099         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1100         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1101
1102         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1103                               ok_features, clear_ok_features,
1104                               &type_err, &mask_err)) {
1105                 if (!mask_err)
1106                         fprintf(stderr,
1107                                 _("Invalid filesystem option set: %s\n"),
1108                                 features);
1109                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1110                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1111                                           "not supported.\n"),
1112                                 e2p_feature2string(type_err &
1113                                                    E2P_FEATURE_TYPE_MASK,
1114                                                    mask_err));
1115                 else
1116                         fprintf(stderr, _("Setting filesystem feature '%s' "
1117                                           "not supported.\n"),
1118                                 e2p_feature2string(type_err, mask_err));
1119                 return 1;
1120         }
1121
1122         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1123                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1124                     !(mount_flags & EXT2_MF_READONLY)) {
1125                         fputs(_("The has_journal feature may only be "
1126                                 "cleared when the filesystem is\n"
1127                                 "unmounted or mounted "
1128                                 "read-only.\n"), stderr);
1129                         return 1;
1130                 }
1131                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1132                     f_flag < 2) {
1133                         fputs(_("The needs_recovery flag is set.  "
1134                                 "Please run e2fsck before clearing\n"
1135                                 "the has_journal flag.\n"), stderr);
1136                         return 1;
1137                 }
1138                 if (sb->s_journal_inum) {
1139                         if (remove_journal_inode(fs))
1140                                 return 1;
1141                 }
1142                 if (sb->s_journal_dev) {
1143                         if (remove_journal_device(fs))
1144                                 return 1;
1145                 }
1146         }
1147
1148         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1149                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1150                 if (ext2fs_has_feature_meta_bg(sb)) {
1151                         fputs(_("Setting filesystem feature 'sparse_super' "
1152                                 "not supported\nfor filesystems with "
1153                                 "the meta_bg feature enabled.\n"),
1154                                 stderr);
1155                         return 1;
1156                 }
1157         }
1158
1159         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1160                 int error;
1161
1162                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1163                     (mount_flags & EXT2_MF_READONLY)) {
1164                         fputs(_("The multiple mount protection feature can't\n"
1165                                 "be set if the filesystem is mounted or\n"
1166                                 "read-only.\n"), stderr);
1167                         return 1;
1168                 }
1169
1170                 error = ext2fs_mmp_init(fs);
1171                 if (error) {
1172                         fputs(_("\nError while enabling multiple mount "
1173                                 "protection feature."), stderr);
1174                         return 1;
1175                 }
1176
1177                 /*
1178                  * We want to update group desc with the new free blocks count
1179                  */
1180                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1181
1182                 printf(_("Multiple mount protection has been enabled "
1183                          "with update interval %ds.\n"),
1184                        sb->s_mmp_update_interval);
1185         }
1186
1187         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1188                 int error;
1189
1190                 if (mount_flags & EXT2_MF_READONLY) {
1191                         fputs(_("The multiple mount protection feature cannot\n"
1192                                 "be disabled if the filesystem is readonly.\n"),
1193                                 stderr);
1194                         return 1;
1195                 }
1196
1197                 error = ext2fs_read_bitmaps(fs);
1198                 if (error) {
1199                         fputs(_("Error while reading bitmaps\n"), stderr);
1200                         return 1;
1201                 }
1202
1203                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1204                 if (error) {
1205                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1206
1207                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1208                                 printf(_("Magic number in MMP block does not "
1209                                          "match. expected: %x, actual: %x\n"),
1210                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1211                         else
1212                                 com_err(program_name, error, "%s",
1213                                         _("while reading MMP block."));
1214                         goto mmp_error;
1215                 }
1216
1217                 /* We need to force out the group descriptors as well */
1218                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1219                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1220 mmp_error:
1221                 sb->s_mmp_block = 0;
1222                 sb->s_mmp_update_interval = 0;
1223         }
1224
1225         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1226                 /*
1227                  * If adding a journal flag, let the create journal
1228                  * code below handle setting the flag and creating the
1229                  * journal.  We supply a default size if necessary.
1230                  */
1231                 if (!journal_size)
1232                         journal_size = -1;
1233                 ext2fs_clear_feature_journal(sb);
1234         }
1235
1236         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1237                 if (!sb->s_def_hash_version)
1238                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1239                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1240                         uuid_generate((unsigned char *) sb->s_hash_seed);
1241         }
1242
1243         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
1244             ext2fs_has_feature_metadata_csum(sb)) {
1245                 if (check_fsck_needed(fs,
1246                         _("Disabling directory index on filesystem with "
1247                           "checksums could take some time.")))
1248                         return 1;
1249                 if (mount_flags & EXT2_MF_MOUNTED) {
1250                         fputs(_("Cannot disable dir_index on a mounted "
1251                                 "filesystem!\n"), stderr);
1252                         exit(1);
1253                 }
1254                 /*
1255                  * Clearing dir_index on checksummed filesystem requires
1256                  * rewriting all directories to update checksums.
1257                  */
1258                 rewrite_checksums |= REWRITE_DIR_FL;
1259         }
1260
1261         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1262                 if (ext2fs_check_desc(fs)) {
1263                         fputs(_("Clearing the flex_bg flag would "
1264                                 "cause the the filesystem to be\n"
1265                                 "inconsistent.\n"), stderr);
1266                         return 1;
1267                 }
1268         }
1269
1270         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1271                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1272                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1273                     !(mount_flags & EXT2_MF_READONLY)) {
1274                         fputs(_("The huge_file feature may only be "
1275                                 "cleared when the filesystem is\n"
1276                                 "unmounted or mounted "
1277                                 "read-only.\n"), stderr);
1278                         return 1;
1279                 }
1280         }
1281
1282         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1283                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1284                 if (check_fsck_needed(fs,
1285                         _("Enabling checksums could take some time.")))
1286                         return 1;
1287                 if (mount_flags & EXT2_MF_MOUNTED) {
1288                         fputs(_("Cannot enable metadata_csum on a mounted "
1289                                 "filesystem!\n"), stderr);
1290                         return 1;
1291                 }
1292                 if (!ext2fs_has_feature_extents(fs->super))
1293                         printf("%s",
1294                                _("Extents are not enabled.  The file extent "
1295                                  "tree can be checksummed, whereas block maps "
1296                                  "cannot.  Not enabling extents reduces the "
1297                                  "coverage of metadata checksumming.  "
1298                                  "Re-run with -O extent to rectify.\n"));
1299                 if (!ext2fs_has_feature_64bit(fs->super))
1300                         printf("%s",
1301                                _("64-bit filesystem support is not enabled.  "
1302                                  "The larger fields afforded by this feature "
1303                                  "enable full-strength checksumming.  "
1304                                  "Run resize2fs -b to rectify.\n"));
1305                 rewrite_checksums = REWRITE_ALL;
1306                 /* metadata_csum supersedes uninit_bg */
1307                 ext2fs_clear_feature_gdt_csum(fs->super);
1308
1309                 /* if uninit_bg was previously off, rewrite group desc */
1310                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1311                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1312                         enable_uninit_bg(fs);
1313
1314                 /*
1315                  * Since metadata_csum supersedes uninit_bg, pretend like
1316                  * uninit_bg has been off all along.
1317                  */
1318                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1319                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1320         }
1321
1322         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1323                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1324                 __u32   test_features[3];
1325
1326                 if (check_fsck_needed(fs,
1327                         _("Disabling checksums could take some time.")))
1328                         return 1;
1329                 if (mount_flags & EXT2_MF_MOUNTED) {
1330                         fputs(_("Cannot disable metadata_csum on a mounted "
1331                                 "filesystem!\n"), stderr);
1332                         return 1;
1333                 }
1334                 rewrite_checksums = REWRITE_ALL;
1335
1336                 /* Enable uninit_bg unless the user expressly turned it off */
1337                 memcpy(test_features, old_features, sizeof(test_features));
1338                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1339                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1340                 e2p_edit_feature2(features, test_features, ok_features,
1341                                   clear_ok_features, NULL, NULL);
1342                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1343                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1344                         ext2fs_set_feature_gdt_csum(fs->super);
1345
1346                 /*
1347                  * If we're turning off metadata_csum and not turning on
1348                  * uninit_bg, rewrite group desc.
1349                  */
1350                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1351                         err = disable_uninit_bg(fs,
1352                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1353                         if (err)
1354                                 return 1;
1355                 } else
1356                         /*
1357                          * metadata_csum previously provided uninit_bg, so if
1358                          * we're also setting the uninit_bg feature bit,
1359                          * pretend like it was previously enabled.  Checksums
1360                          * will be rewritten with crc16 later.
1361                          */
1362                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1363                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1364                 fs->super->s_checksum_seed = 0;
1365                 ext2fs_clear_feature_csum_seed(fs->super);
1366         }
1367
1368         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1369                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1370                 if (mount_flags & EXT2_MF_MOUNTED) {
1371                         fputs(_("Cannot enable uninit_bg on a mounted "
1372                                 "filesystem!\n"), stderr);
1373                         return 1;
1374                 }
1375
1376                 /* Do not enable uninit_bg when metadata_csum enabled */
1377                 if (ext2fs_has_feature_metadata_csum(fs->super))
1378                         ext2fs_clear_feature_gdt_csum(fs->super);
1379                 else
1380                         enable_uninit_bg(fs);
1381         }
1382
1383         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1384                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1385                 if (mount_flags & EXT2_MF_MOUNTED) {
1386                         fputs(_("Cannot disable uninit_bg on a mounted "
1387                                 "filesystem!\n"), stderr);
1388                         return 1;
1389                 }
1390
1391                 err = disable_uninit_bg(fs,
1392                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1393                 if (err)
1394                         return 1;
1395         }
1396
1397         /*
1398          * We don't actually toggle 64bit; resize2fs does that.  But this
1399          * must come after the metadata_csum feature_on so that it won't
1400          * complain about the lack of 64bit.
1401          */
1402         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1403                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1404                 if (mount_flags & EXT2_MF_MOUNTED) {
1405                         fprintf(stderr, _("Cannot enable 64-bit mode "
1406                                           "while mounted!\n"));
1407                         return 1;
1408                 }
1409                 ext2fs_clear_feature_64bit(sb);
1410                 feature_64bit = 1;
1411         }
1412         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1413                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1414                 if (mount_flags & EXT2_MF_MOUNTED) {
1415                         fprintf(stderr, _("Cannot disable 64-bit mode "
1416                                           "while mounted!\n"));
1417                         return 1;
1418                 }
1419                 ext2fs_set_feature_64bit(sb);
1420                 feature_64bit = -1;
1421         }
1422
1423         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1424                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1425                 /*
1426                  * Set the Q_flag here and handle the quota options in the code
1427                  * below.
1428                  */
1429                 if (!Q_flag) {
1430                         Q_flag = 1;
1431                         /* Enable usr/grp quota by default */
1432                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1433                                 if (qtype != PRJQUOTA)
1434                                         quota_enable[qtype] = QOPT_ENABLE;
1435                                 else
1436                                         quota_enable[qtype] = QOPT_DISABLE;
1437                         }
1438                 }
1439                 ext2fs_clear_feature_quota(sb);
1440         }
1441
1442         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1443                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1444                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1445                         fprintf(stderr, _("Cannot enable project feature; "
1446                                           "inode size too small.\n"));
1447                         return 1;
1448                 }
1449                 Q_flag = 1;
1450                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1451         }
1452
1453         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1454                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1455                 Q_flag = 1;
1456                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1457         }
1458
1459         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1460                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1461                 /*
1462                  * Set the Q_flag here and handle the quota options in the code
1463                  * below.
1464                  */
1465                 if (Q_flag)
1466                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1467                                 "arguments.\n"), stderr);
1468                 Q_flag = 1;
1469                 /* Disable all quota by default */
1470                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1471                         quota_enable[qtype] = QOPT_DISABLE;
1472         }
1473
1474         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1475                 fs->super->s_encrypt_algos[0] =
1476                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1477                 fs->super->s_encrypt_algos[1] =
1478                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1479         }
1480
1481         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1482                 if (ext2fs_has_feature_dirdata(sb)) {
1483                         fputs(_("Can not enable casefold feature on "
1484                                 "filesystem has dirdata.\n"), stderr);
1485                         return 1;
1486                 }
1487                 if (mount_flags & EXT2_MF_MOUNTED) {
1488                         fputs(_("The casefold feature may only be enabled when "
1489                                 "the filesystem is unmounted.\n"), stderr);
1490                         return 1;
1491                 }
1492                 fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
1493                 fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
1494                 enabling_casefold = 1;
1495         }
1496
1497         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1498                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1499                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1500                         fputs(_("Setting feature 'metadata_csum_seed' "
1501                                 "is only supported\non filesystems with "
1502                                 "the metadata_csum feature enabled.\n"),
1503                                 stderr);
1504                         return 1;
1505                 }
1506                 try_confirm_csum_seed_support();
1507                 fs->super->s_checksum_seed = fs->csum_seed;
1508         }
1509
1510         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1511                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1512                 __le32 uuid_seed;
1513
1514                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1515                                         sizeof(fs->super->s_uuid));
1516                 if (fs->super->s_checksum_seed != uuid_seed) {
1517                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1518                                 fputs(_("UUID has changed since enabling "
1519                 "metadata_csum.  Filesystem must be unmounted "
1520                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1521                                       stderr);
1522                                 return 1;
1523                         }
1524                         if (check_fsck_needed(fs, _("Recalculating checksums "
1525                                                     "could take some time.")))
1526                                 return 1;
1527                         rewrite_checksums = REWRITE_ALL;
1528                 }
1529         }
1530
1531         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_DIRDATA)) {
1532                 if (ext2fs_has_feature_inline_data(sb)) {
1533                         fputs(_("Can not enable dirdata feature on "
1534                                 "filesystem has inline_data.\n"), stderr);
1535                         return 1;
1536                 }
1537                 if (ext2fs_has_feature_casefold(sb)) {
1538                         fputs(_("Can not enable dirdata feature on "
1539                                 "filesystem has casefold.\n"), stderr);
1540                         return 1;
1541                 }
1542                 if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1543                                EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1544                         fputs(_("Can not enable dirdata feature with"
1545                                 "casefold feature.\n"), stderr);
1546                         return 1;
1547                 }
1548         }
1549
1550         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1551             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1552              sb->s_feature_incompat))
1553                 ext2fs_update_dynamic_rev(fs);
1554
1555         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1556                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1557             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1558                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1559             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1560                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1561             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1562                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1563             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1564                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1565                 request_fsck_afterwards(fs);
1566
1567         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1568             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1569             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1570                 ext2fs_mark_super_dirty(fs);
1571
1572         return 0;
1573 }
1574
1575 /*
1576  * Add a journal to the filesystem.
1577  */
1578 static int add_journal(ext2_filsys fs)
1579 {
1580         struct ext2fs_journal_params    jparams;
1581         errcode_t       retval;
1582         ext2_filsys     jfs;
1583         io_manager      io_ptr;
1584
1585         if (ext2fs_has_feature_journal(fs->super)) {
1586                 fputs(_("The filesystem already has a journal.\n"), stderr);
1587                 goto err;
1588         }
1589         if (journal_device) {
1590                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1591                                         NULL))
1592                         proceed_question(-1);
1593                 check_mount(journal_device, 0, _("journal"));
1594 #ifdef CONFIG_TESTIO_DEBUG
1595                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1596                         io_ptr = test_io_manager;
1597                         test_io_backing_manager = unix_io_manager;
1598                 } else
1599 #endif
1600                         io_ptr = unix_io_manager;
1601                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1602                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1603                                      fs->blocksize, io_ptr, &jfs);
1604                 if (retval) {
1605                         com_err(program_name, retval,
1606                                 _("\n\twhile trying to open journal on %s\n"),
1607                                 journal_device);
1608                         goto err;
1609                 }
1610                 printf(_("Creating journal on device %s: "),
1611                        journal_device);
1612                 fflush(stdout);
1613
1614                 retval = ext2fs_add_journal_device(fs, jfs);
1615                 ext2fs_close_free(&jfs);
1616                 if (retval) {
1617                         com_err(program_name, retval,
1618                                 _("while adding filesystem to journal on %s"),
1619                                 journal_device);
1620                         goto err;
1621                 }
1622                 fputs(_("done\n"), stdout);
1623         } else if (journal_size) {
1624                 fputs(_("Creating journal inode: "), stdout);
1625                 fflush(stdout);
1626                 figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
1627
1628                 if (journal_location_string)
1629                         journal_location =
1630                                 parse_num_blocks2(journal_location_string,
1631                                                   fs->super->s_log_block_size);
1632                 retval = ext2fs_add_journal_inode3(fs, &jparams,
1633                                                    journal_location,
1634                                                    journal_flags);
1635                 if (retval) {
1636                         fprintf(stderr, "\n");
1637                         com_err(program_name, retval, "%s",
1638                                 _("\n\twhile trying to create journal file"));
1639                         return retval;
1640                 } else
1641                         fputs(_("done\n"), stdout);
1642                 /*
1643                  * If the filesystem wasn't mounted, we need to force
1644                  * the block group descriptors out.
1645                  */
1646                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1647                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1648         }
1649         print_check_message(fs->super->s_max_mnt_count,
1650                             fs->super->s_checkinterval);
1651         return 0;
1652
1653 err:
1654         free(journal_device);
1655         return 1;
1656 }
1657
1658 static int handle_quota_options(ext2_filsys fs)
1659 {
1660         errcode_t retval;
1661         quota_ctx_t qctx;
1662         ext2_ino_t qf_ino;
1663         enum quota_type qtype;
1664         unsigned int qtype_bits = 0;
1665         int need_dirty = 0;
1666
1667         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1668                 if (quota_enable[qtype] != 0)
1669                         break;
1670         if (qtype == MAXQUOTAS)
1671                 /* Nothing to do. */
1672                 return 0;
1673
1674         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1675             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1676                 fprintf(stderr, _("Cannot enable project quota; "
1677                                   "inode size too small.\n"));
1678                 return 1;
1679         }
1680
1681         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1682                 if (quota_enable[qtype] == QOPT_ENABLE)
1683                         qtype_bits |= 1 << qtype;
1684         }
1685
1686         retval = quota_init_context(&qctx, fs, qtype_bits);
1687         if (retval) {
1688                 com_err(program_name, retval,
1689                         _("while initializing quota context in support library"));
1690                 return 1;
1691         }
1692
1693         if (qtype_bits)
1694                 quota_compute_usage(qctx);
1695
1696         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1697                 if (quota_enable[qtype] == QOPT_ENABLE &&
1698                     *quota_sb_inump(fs->super, qtype) == 0) {
1699                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1700                                 retval = quota_update_limits(qctx, qf_ino,
1701                                                              qtype);
1702                                 if (retval) {
1703                                         com_err(program_name, retval,
1704                                                 _("while updating quota limits (%d)"),
1705                                                 qtype);
1706                                 quota_errout:
1707                                         quota_release_context(&qctx);
1708                                         return 1;
1709                                 }
1710                         }
1711                         retval = quota_write_inode(qctx, 1 << qtype);
1712                         if (retval) {
1713                                 com_err(program_name, retval,
1714                                         _("while writing quota file (%d)"),
1715                                         qtype);
1716                                 goto quota_errout;
1717                         }
1718                         /* Enable Quota feature if one of quota enabled */
1719                         if (!ext2fs_has_feature_quota(fs->super)) {
1720                                 ext2fs_set_feature_quota(fs->super);
1721                                 need_dirty = 1;
1722                         }
1723                         if (qtype == PRJQUOTA &&
1724                             !ext2fs_has_feature_project(fs->super)) {
1725                                 ext2fs_set_feature_project(fs->super);
1726                                 need_dirty = 1;
1727                         }
1728                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1729                         retval = quota_remove_inode(fs, qtype);
1730                         if (retval) {
1731                                 com_err(program_name, retval,
1732                                         _("while removing quota file (%d)"),
1733                                         qtype);
1734                                 goto quota_errout;
1735                         }
1736                         if (qtype == PRJQUOTA) {
1737                                 ext2fs_clear_feature_project(fs->super);
1738                                 need_dirty = 1;
1739                         }
1740                 }
1741         }
1742
1743         quota_release_context(&qctx);
1744         /* Clear Quota feature if all quota types disabled. */
1745         if (!qtype_bits) {
1746                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1747                         if (*quota_sb_inump(fs->super, qtype))
1748                                 break;
1749                 if (qtype == MAXQUOTAS) {
1750                         ext2fs_clear_feature_quota(fs->super);
1751                         need_dirty = 1;
1752                 }
1753
1754         }
1755         if (need_dirty)
1756                 ext2fs_mark_super_dirty(fs);
1757         return 0;
1758 }
1759
1760 static int option_handle_function(char *token)
1761 {
1762         if (strncmp(token, "usr", 3) == 0) {
1763                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1764         } else if (strncmp(token, "^usr", 4) == 0) {
1765                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1766         } else if (strncmp(token, "grp", 3) == 0) {
1767                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1768         } else if (strncmp(token, "^grp", 4) == 0) {
1769                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1770         } else if (strncmp(token, "prj", 3) == 0) {
1771                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1772         } else if (strncmp(token, "^prj", 4) == 0) {
1773                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1774         } else {
1775                 fputs(_("\nBad quota options specified.\n\n"
1776                         "Following valid quota options are available "
1777                         "(pass by separating with comma):\n"
1778                         "\t[^]usr[quota]\n"
1779                         "\t[^]grp[quota]\n"
1780                         "\t[^]prj[quota]\n"
1781                         "\n\n"), stderr);
1782                 return 1;
1783         }
1784         return 0;
1785 }
1786
1787 static void parse_e2label_options(int argc, char ** argv)
1788 {
1789         if ((argc < 2) || (argc > 3)) {
1790                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1791                 exit(1);
1792         }
1793         io_options = strchr(argv[1], '?');
1794         if (io_options)
1795                 *io_options++ = 0;
1796         device_name = blkid_get_devname(NULL, argv[1], NULL);
1797         if (!device_name) {
1798                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1799                         argv[1]);
1800                 exit(1);
1801         }
1802         open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
1803         if (argc == 3) {
1804                 open_flag |= EXT2_FLAG_RW;
1805                 L_flag = 1;
1806                 new_label = argv[2];
1807         } else
1808                 print_label++;
1809 }
1810
1811 static time_t parse_time(char *str)
1812 {
1813         struct  tm      ts;
1814
1815         if (strcmp(str, "now") == 0) {
1816                 return (time(0));
1817         }
1818         memset(&ts, 0, sizeof(ts));
1819 #ifdef HAVE_STRPTIME
1820         strptime(str, "%Y%m%d%H%M%S", &ts);
1821 #else
1822         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1823                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1824         ts.tm_year -= 1900;
1825         ts.tm_mon -= 1;
1826         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1827             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1828             ts.tm_min > 59 || ts.tm_sec > 61)
1829                 ts.tm_mday = 0;
1830 #endif
1831         if (ts.tm_mday == 0) {
1832                 com_err(program_name, 0,
1833                         _("Couldn't parse date/time specifier: %s"),
1834                         str);
1835                 usage();
1836         }
1837         ts.tm_isdst = -1;
1838         return (mktime(&ts));
1839 }
1840
1841 static void parse_tune2fs_options(int argc, char **argv)
1842 {
1843         int c;
1844         char *tmp;
1845         struct group *gr;
1846         struct passwd *pw;
1847         int ret;
1848         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1849
1850         open_flag = 0;
1851         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1852         while ((c = getopt(argc, argv, optstring)) != EOF)
1853                 switch (c) {
1854                 case 'c':
1855                         open_flag = EXT2_FLAG_RW;
1856                         c_flag = 1;
1857                         if (strcmp(optarg, "random") == 0) {
1858                                 max_mount_count = 65536;
1859                                 break;
1860                         }
1861                         max_mount_count = strtol(optarg, &tmp, 0);
1862                         if (*tmp || max_mount_count > 16000 ||
1863                             max_mount_count < -16000) {
1864                                 com_err(program_name, 0,
1865                                         _("bad mounts count - %s"),
1866                                         optarg);
1867                                 usage();
1868                         }
1869                         if (max_mount_count == 0)
1870                                 max_mount_count = -1;
1871                         break;
1872                 case 'C':
1873                         mount_count = strtoul(optarg, &tmp, 0);
1874                         if (*tmp || mount_count > 16000) {
1875                                 com_err(program_name, 0,
1876                                         _("bad mounts count - %s"),
1877                                         optarg);
1878                                 usage();
1879                         }
1880                         C_flag = 1;
1881                         open_flag = EXT2_FLAG_RW;
1882                         break;
1883                 case 'e':
1884                         if (strcmp(optarg, "continue") == 0)
1885                                 errors = EXT2_ERRORS_CONTINUE;
1886                         else if (strcmp(optarg, "remount-ro") == 0)
1887                                 errors = EXT2_ERRORS_RO;
1888                         else if (strcmp(optarg, "panic") == 0)
1889                                 errors = EXT2_ERRORS_PANIC;
1890                         else {
1891                                 com_err(program_name, 0,
1892                                         _("bad error behavior - %s"),
1893                                         optarg);
1894                                 usage();
1895                         }
1896                         e_flag = 1;
1897                         open_flag = EXT2_FLAG_RW;
1898                         break;
1899                 case 'E':
1900                         extended_cmd = optarg;
1901                         open_flag |= EXT2_FLAG_RW;
1902                         break;
1903                 case 'f': /* Force */
1904                         f_flag++;
1905                         break;
1906                 case 'g':
1907                         resgid = strtoul(optarg, &tmp, 0);
1908                         if (*tmp) {
1909                                 gr = getgrnam(optarg);
1910                                 if (gr == NULL)
1911                                         tmp = optarg;
1912                                 else {
1913                                         resgid = gr->gr_gid;
1914                                         *tmp = 0;
1915                                 }
1916                         }
1917                         if (*tmp) {
1918                                 com_err(program_name, 0,
1919                                         _("bad gid/group name - %s"),
1920                                         optarg);
1921                                 usage();
1922                         }
1923                         g_flag = 1;
1924                         open_flag = EXT2_FLAG_RW;
1925                         break;
1926                 case 'i':
1927                         interval = strtoul(optarg, &tmp, 0);
1928                         switch (*tmp) {
1929                         case 's':
1930                                 tmp++;
1931                                 break;
1932                         case '\0':
1933                         case 'd':
1934                         case 'D': /* days */
1935                                 interval *= 86400;
1936                                 if (*tmp != '\0')
1937                                         tmp++;
1938                                 break;
1939                         case 'm':
1940                         case 'M': /* months! */
1941                                 interval *= 86400 * 30;
1942                                 tmp++;
1943                                 break;
1944                         case 'w':
1945                         case 'W': /* weeks */
1946                                 interval *= 86400 * 7;
1947                                 tmp++;
1948                                 break;
1949                         }
1950                         if (*tmp) {
1951                                 com_err(program_name, 0,
1952                                         _("bad interval - %s"), optarg);
1953                                 usage();
1954                         }
1955                         i_flag = 1;
1956                         open_flag = EXT2_FLAG_RW;
1957                         break;
1958                 case 'j':
1959                         if (!journal_size)
1960                                 journal_size = -1;
1961                         open_flag = EXT2_FLAG_RW;
1962                         break;
1963                 case 'J':
1964                         parse_journal_opts(optarg);
1965                         open_flag = EXT2_FLAG_RW;
1966                         break;
1967                 case 'l':
1968                         l_flag = 1;
1969                         break;
1970                 case 'L':
1971                         new_label = optarg;
1972                         L_flag = 1;
1973                         open_flag |= EXT2_FLAG_RW |
1974                                 EXT2_FLAG_JOURNAL_DEV_OK;
1975                         break;
1976                 case 'm':
1977                         reserved_ratio = strtod(optarg, &tmp);
1978                         if (*tmp || reserved_ratio > 50 ||
1979                             reserved_ratio < 0) {
1980                                 com_err(program_name, 0,
1981                                         _("bad reserved block ratio - %s"),
1982                                         optarg);
1983                                 usage();
1984                         }
1985                         m_flag = 1;
1986                         open_flag = EXT2_FLAG_RW;
1987                         break;
1988                 case 'M':
1989                         new_last_mounted = optarg;
1990                         M_flag = 1;
1991                         open_flag = EXT2_FLAG_RW;
1992                         break;
1993                 case 'o':
1994                         if (mntopts_cmd) {
1995                                 com_err(program_name, 0, "%s",
1996                                         _("-o may only be specified once"));
1997                                 usage();
1998                         }
1999                         mntopts_cmd = optarg;
2000                         open_flag = EXT2_FLAG_RW;
2001                         break;
2002                 case 'O':
2003                         if (features_cmd) {
2004                                 com_err(program_name, 0, "%s",
2005                                         _("-O may only be specified once"));
2006                                 usage();
2007                         }
2008                         features_cmd = optarg;
2009                         open_flag = EXT2_FLAG_RW;
2010                         break;
2011                 case 'Q':
2012                         Q_flag = 1;
2013                         ret = parse_quota_opts(optarg, option_handle_function);
2014                         if (ret)
2015                                 exit(1);
2016                         open_flag = EXT2_FLAG_RW;
2017                         break;
2018                 case 'r':
2019                         reserved_blocks = strtoul(optarg, &tmp, 0);
2020                         if (*tmp) {
2021                                 com_err(program_name, 0,
2022                                         _("bad reserved blocks count - %s"),
2023                                         optarg);
2024                                 usage();
2025                         }
2026                         r_flag = 1;
2027                         open_flag = EXT2_FLAG_RW;
2028                         break;
2029                 case 's': /* Deprecated */
2030                         s_flag = atoi(optarg);
2031                         open_flag = EXT2_FLAG_RW;
2032                         break;
2033                 case 'T':
2034                         T_flag = 1;
2035                         last_check_time = parse_time(optarg);
2036                         open_flag = EXT2_FLAG_RW;
2037                         break;
2038                 case 'u':
2039                                 resuid = strtoul(optarg, &tmp, 0);
2040                                 if (*tmp) {
2041                                         pw = getpwnam(optarg);
2042                                         if (pw == NULL)
2043                                                 tmp = optarg;
2044                                         else {
2045                                                 resuid = pw->pw_uid;
2046                                                 *tmp = 0;
2047                                         }
2048                                 }
2049                                 if (*tmp) {
2050                                         com_err(program_name, 0,
2051                                                 _("bad uid/user name - %s"),
2052                                                 optarg);
2053                                         usage();
2054                                 }
2055                                 u_flag = 1;
2056                                 open_flag = EXT2_FLAG_RW;
2057                                 break;
2058                 case 'U':
2059                         new_UUID = optarg;
2060                         U_flag = 1;
2061                         open_flag = EXT2_FLAG_RW |
2062                                 EXT2_FLAG_JOURNAL_DEV_OK;
2063                         break;
2064                 case 'I':
2065                         new_inode_size = strtoul(optarg, &tmp, 0);
2066                         if (*tmp) {
2067                                 com_err(program_name, 0,
2068                                         _("bad inode size - %s"),
2069                                         optarg);
2070                                 usage();
2071                         }
2072                         if (!((new_inode_size &
2073                                (new_inode_size - 1)) == 0)) {
2074                                 com_err(program_name, 0,
2075                                         _("Inode size must be a "
2076                                           "power of two- %s"),
2077                                         optarg);
2078                                 usage();
2079                         }
2080                         open_flag = EXT2_FLAG_RW;
2081                         I_flag = 1;
2082                         break;
2083                 case 'z':
2084                         undo_file = optarg;
2085                         break;
2086                 default:
2087                         usage();
2088                 }
2089         if (optind < argc - 1 || optind == argc)
2090                 usage();
2091         if (!open_flag && !l_flag)
2092                 usage();
2093         io_options = strchr(argv[optind], '?');
2094         if (io_options)
2095                 *io_options++ = 0;
2096         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2097         if (!device_name) {
2098                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2099                         argv[optind]);
2100                 exit(1);
2101         }
2102 }
2103
2104 #ifdef CONFIG_BUILD_FINDFS
2105 void do_findfs(int argc, char **argv)
2106 {
2107         char    *dev;
2108
2109         if ((argc != 2) ||
2110             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2111                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2112                 exit(2);
2113         }
2114         dev = blkid_get_devname(NULL, argv[1], NULL);
2115         if (!dev) {
2116                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2117                         argv[1]);
2118                 exit(1);
2119         }
2120         puts(dev);
2121         exit(0);
2122 }
2123 #endif
2124
2125 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2126 {
2127         struct ext2_super_block *sb = fs->super;
2128         char    *buf, *token, *next, *p, *arg;
2129         int     len, hash_alg;
2130         int     r_usage = 0;
2131         int encoding = 0;
2132         char    *encoding_flags = NULL;
2133
2134         len = strlen(opts);
2135         buf = malloc(len+1);
2136         if (!buf) {
2137                 fprintf(stderr, "%s",
2138                         _("Couldn't allocate memory to parse options!\n"));
2139                 return 1;
2140         }
2141         strcpy(buf, opts);
2142         for (token = buf; token && *token; token = next) {
2143                 p = strchr(token, ',');
2144                 next = 0;
2145                 if (p) {
2146                         *p = 0;
2147                         next = p+1;
2148                 }
2149                 arg = strchr(token, '=');
2150                 if (arg) {
2151                         *arg = 0;
2152                         arg++;
2153                 }
2154                 if (strcmp(token, "clear-mmp") == 0 ||
2155                     strcmp(token, "clear_mmp") == 0) {
2156                         clear_mmp = 1;
2157                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2158                         unsigned long intv;
2159                         if (!arg) {
2160                                 r_usage++;
2161                                 continue;
2162                         }
2163                         intv = strtoul(arg, &p, 0);
2164                         if (*p) {
2165                                 fprintf(stderr,
2166                                         _("Invalid mmp_update_interval: %s\n"),
2167                                         arg);
2168                                 r_usage++;
2169                                 continue;
2170                         }
2171                         if (intv == 0) {
2172                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2173                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2174                                 fprintf(stderr,
2175                                         _("mmp_update_interval too big: %lu\n"),
2176                                         intv);
2177                                 r_usage++;
2178                                 continue;
2179                         }
2180                         printf(P_("Setting multiple mount protection update "
2181                                   "interval to %lu second\n",
2182                                   "Setting multiple mount protection update "
2183                                   "interval to %lu seconds\n", intv),
2184                                intv);
2185                         sb->s_mmp_update_interval = intv;
2186                         ext2fs_mark_super_dirty(fs);
2187                 } else if (!strcmp(token, "force_fsck")) {
2188                         sb->s_state |= EXT2_ERROR_FS;
2189                         printf(_("Setting filesystem error flag to force fsck.\n"));
2190                         ext2fs_mark_super_dirty(fs);
2191                 } else if (!strcmp(token, "test_fs")) {
2192                         sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2193                         printf("Setting test filesystem flag\n");
2194                         ext2fs_mark_super_dirty(fs);
2195                 } else if (!strcmp(token, "^test_fs")) {
2196                         sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2197                         printf("Clearing test filesystem flag\n");
2198                         ext2fs_mark_super_dirty(fs);
2199                 } else if (strcmp(token, "stride") == 0) {
2200                         if (!arg) {
2201                                 r_usage++;
2202                                 continue;
2203                         }
2204                         stride = strtoul(arg, &p, 0);
2205                         if (*p) {
2206                                 fprintf(stderr,
2207                                         _("Invalid RAID stride: %s\n"),
2208                                         arg);
2209                                 r_usage++;
2210                                 continue;
2211                         }
2212                         stride_set = 1;
2213                 } else if (strcmp(token, "stripe-width") == 0 ||
2214                            strcmp(token, "stripe_width") == 0) {
2215                         if (!arg) {
2216                                 r_usage++;
2217                                 continue;
2218                         }
2219                         stripe_width = strtoul(arg, &p, 0);
2220                         if (*p) {
2221                                 fprintf(stderr,
2222                                         _("Invalid RAID stripe-width: %s\n"),
2223                                         arg);
2224                                 r_usage++;
2225                                 continue;
2226                         }
2227                         stripe_width_set = 1;
2228                 } else if (strcmp(token, "hash_alg") == 0 ||
2229                            strcmp(token, "hash-alg") == 0) {
2230                         if (!arg) {
2231                                 r_usage++;
2232                                 continue;
2233                         }
2234                         hash_alg = e2p_string2hash(arg);
2235                         if (hash_alg < 0) {
2236                                 fprintf(stderr,
2237                                         _("Invalid hash algorithm: %s\n"),
2238                                         arg);
2239                                 r_usage++;
2240                                 continue;
2241                         }
2242                         sb->s_def_hash_version = hash_alg;
2243                         printf(_("Setting default hash algorithm "
2244                                  "to %s (%d)\n"),
2245                                arg, hash_alg);
2246                         ext2fs_mark_super_dirty(fs);
2247                 } else if (!strcmp(token, "mount_opts")) {
2248                         if (!arg) {
2249                                 r_usage++;
2250                                 continue;
2251                         }
2252                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2253                                 fprintf(stderr,
2254                                         "Extended mount options too long\n");
2255                                 continue;
2256                         }
2257                         ext_mount_opts = strdup(arg);
2258                 } else if (!strcmp(token, "encoding")) {
2259                         if (!arg) {
2260                                 r_usage++;
2261                                 continue;
2262                         }
2263                         if (mount_flags & EXT2_MF_MOUNTED) {
2264                                 fputs(_("The casefold feature may only be enabled when "
2265                                         "the filesystem is unmounted.\n"), stderr);
2266                                 r_usage++;
2267                                 continue;
2268                         }
2269                         if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
2270                                 fprintf(stderr, _("Cannot alter existing encoding\n"));
2271                                 r_usage++;
2272                                 continue;
2273                         }
2274                         encoding = e2p_str2encoding(arg);
2275                         if (encoding < 0) {
2276                                 fprintf(stderr, _("Invalid encoding: %s\n"), arg);
2277                                 r_usage++;
2278                                 continue;
2279                         }
2280                         enabling_casefold = 1;
2281                         sb->s_encoding = encoding;
2282                         printf(_("Setting encoding to '%s'\n"), arg);
2283                         sb->s_encoding_flags =
2284                                 e2p_get_encoding_flags(sb->s_encoding);
2285                 } else if (!strcmp(token, "encoding_flags")) {
2286                         if (!arg) {
2287                                 r_usage++;
2288                                 continue;
2289                         }
2290                         encoding_flags = arg;
2291                 } else
2292                         r_usage++;
2293         }
2294
2295         if (encoding > 0 && !r_usage) {
2296                 sb->s_encoding_flags =
2297                         e2p_get_encoding_flags(sb->s_encoding);
2298
2299                 if (encoding_flags &&
2300                     e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
2301                                            &sb->s_encoding_flags)) {
2302                         fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
2303                                         encoding_flags);
2304                         r_usage++;
2305                 } else if (encoding_flags)
2306                         printf(_("Setting encoding_flags to '%s'\n"),
2307                                  encoding_flags);
2308                 ext2fs_set_feature_casefold(sb);
2309                 ext2fs_mark_super_dirty(fs);
2310         } else if (encoding_flags && !r_usage) {
2311                 fprintf(stderr, _("error: An encoding must be explicitly "
2312                                   "specified when passing encoding-flags\n"));
2313                 r_usage++;
2314         }
2315         if (r_usage) {
2316                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2317                         "Extended options are separated by commas, "
2318                         "and may take an argument which\n"
2319                         "\tis set off by an equals ('=') sign.\n\n"
2320                         "Valid extended options are:\n"
2321                         "\tclear_mmp\n"
2322                         "\thash_alg=<hash algorithm>\n"
2323                         "\tmount_opts=<extended default mount options>\n"
2324                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2325                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2326                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2327                         "\tforce_fsck\n"
2328                         "\ttest_fs\n"
2329                         "\t^test_fs\n"
2330                         "\tencoding=<encoding>\n"
2331                         "\tencoding_flags=<flags>\n"));
2332                 free(buf);
2333                 return 1;
2334         }
2335         free(buf);
2336
2337         return 0;
2338 }
2339
2340 /*
2341  * Fill in the block bitmap bmap with the information regarding the
2342  * blocks to be moved
2343  */
2344 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2345                             ext2fs_block_bitmap bmap)
2346 {
2347         dgrp_t i;
2348         int retval;
2349         ext2_badblocks_list bb_list = 0;
2350         blk64_t j, needed_blocks = 0;
2351         blk64_t start_blk, end_blk;
2352
2353         retval = ext2fs_read_bb_inode(fs, &bb_list);
2354         if (retval)
2355                 return retval;
2356
2357         for (i = 0; i < fs->group_desc_count; i++) {
2358                 start_blk = ext2fs_inode_table_loc(fs, i) +
2359                                         fs->inode_blocks_per_group;
2360
2361                 end_blk = ext2fs_inode_table_loc(fs, i) +
2362                                         new_ino_blks_per_grp;
2363
2364                 for (j = start_blk; j < end_blk; j++) {
2365                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2366                                 /*
2367                                  * IF the block is a bad block we fail
2368                                  */
2369                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2370                                         ext2fs_badblocks_list_free(bb_list);
2371                                         return ENOSPC;
2372                                 }
2373
2374                                 ext2fs_mark_block_bitmap2(bmap, j);
2375                         } else {
2376                                 /*
2377                                  * We are going to use this block for
2378                                  * inode table. So mark them used.
2379                                  */
2380                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2381                         }
2382                 }
2383                 needed_blocks += end_blk - start_blk;
2384         }
2385
2386         ext2fs_badblocks_list_free(bb_list);
2387         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2388                 return ENOSPC;
2389
2390         return 0;
2391 }
2392
2393 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2394 {
2395         dgrp_t group;
2396         group = ext2fs_group_of_blk2(fs, blk);
2397         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2398                 return 1;
2399         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2400                 return 1;
2401         return 0;
2402 }
2403
2404 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2405 {
2406         blk64_t start_blk, end_blk;
2407         start_blk = fs->super->s_first_data_block +
2408                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2409         /*
2410          * We cannot get new block beyond end_blk for for the last block group
2411          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2412          */
2413         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2414         if (blk >= start_blk && blk <= end_blk)
2415                 return 1;
2416         return 0;
2417 }
2418
2419 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2420 {
2421
2422         char *buf;
2423         dgrp_t group = 0;
2424         errcode_t retval;
2425         int meta_data = 0;
2426         blk64_t blk, new_blk, goal;
2427         struct blk_move *bmv;
2428
2429         retval = ext2fs_get_mem(fs->blocksize, &buf);
2430         if (retval)
2431                 return retval;
2432
2433         for (new_blk = blk = fs->super->s_first_data_block;
2434              blk < ext2fs_blocks_count(fs->super); blk++) {
2435                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2436                         continue;
2437
2438                 if (ext2fs_is_meta_block(fs, blk)) {
2439                         /*
2440                          * If the block is mapping a fs meta data block
2441                          * like group desc/block bitmap/inode bitmap. We
2442                          * should find a block in the same group and fix
2443                          * the respective fs metadata pointers. Otherwise
2444                          * fail
2445                          */
2446                         group = ext2fs_group_of_blk2(fs, blk);
2447                         goal = ext2fs_group_first_block2(fs, group);
2448                         meta_data = 1;
2449
2450                 } else {
2451                         goal = new_blk;
2452                 }
2453                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2454                 if (retval)
2455                         goto err_out;
2456
2457                 /* new fs meta data block should be in the same group */
2458                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2459                         retval = ENOSPC;
2460                         goto err_out;
2461                 }
2462
2463                 /* Mark this block as allocated */
2464                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2465
2466                 /* Add it to block move list */
2467                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2468                 if (retval)
2469                         goto err_out;
2470
2471                 bmv->old_loc = blk;
2472                 bmv->new_loc = new_blk;
2473
2474                 list_add(&(bmv->list), &blk_move_list);
2475
2476                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2477                 if (retval)
2478                         goto err_out;
2479
2480                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2481                 if (retval)
2482                         goto err_out;
2483         }
2484
2485 err_out:
2486         ext2fs_free_mem(&buf);
2487         return retval;
2488 }
2489
2490 static blk64_t translate_block(blk64_t blk)
2491 {
2492         struct list_head *entry;
2493         struct blk_move *bmv;
2494
2495         list_for_each(entry, &blk_move_list) {
2496                 bmv = list_entry(entry, struct blk_move, list);
2497                 if (bmv->old_loc == blk)
2498                         return bmv->new_loc;
2499         }
2500
2501         return 0;
2502 }
2503
2504 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2505                          blk64_t *block_nr,
2506                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2507                          blk64_t ref_block EXT2FS_ATTR((unused)),
2508                          int ref_offset EXT2FS_ATTR((unused)),
2509                          void *priv_data)
2510 {
2511         int ret = 0;
2512         blk64_t new_blk;
2513         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2514
2515         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2516                 return 0;
2517         new_blk = translate_block(*block_nr);
2518         if (new_blk) {
2519                 *block_nr = new_blk;
2520                 /*
2521                  * This will force the ext2fs_write_inode in the iterator
2522                  */
2523                 ret |= BLOCK_CHANGED;
2524         }
2525
2526         return ret;
2527 }
2528
2529 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2530 {
2531         errcode_t retval = 0;
2532         ext2_ino_t ino;
2533         blk64_t blk;
2534         char *block_buf = 0;
2535         struct ext2_inode inode;
2536         ext2_inode_scan scan = NULL;
2537
2538         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2539         if (retval)
2540                 return retval;
2541
2542         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2543         if (retval)
2544                 goto err_out;
2545
2546         while (1) {
2547                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2548                 if (retval)
2549                         goto err_out;
2550
2551                 if (!ino)
2552                         break;
2553
2554                 if (inode.i_links_count == 0)
2555                         continue; /* inode not in use */
2556
2557                 /* FIXME!!
2558                  * If we end up modifying the journal inode
2559                  * the sb->s_jnl_blocks will differ. But a
2560                  * subsequent e2fsck fixes that.
2561                  * Do we need to fix this ??
2562                  */
2563
2564                 if (ext2fs_file_acl_block(fs, &inode) &&
2565                     ext2fs_test_block_bitmap2(bmap,
2566                                         ext2fs_file_acl_block(fs, &inode))) {
2567                         blk = translate_block(ext2fs_file_acl_block(fs,
2568                                                                     &inode));
2569                         if (!blk)
2570                                 continue;
2571
2572                         ext2fs_file_acl_block_set(fs, &inode, blk);
2573
2574                         /*
2575                          * Write the inode to disk so that inode table
2576                          * resizing can work
2577                          */
2578                         retval = ext2fs_write_inode(fs, ino, &inode);
2579                         if (retval)
2580                                 goto err_out;
2581                 }
2582
2583                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2584                         continue;
2585
2586                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2587                                                process_block, bmap);
2588                 if (retval)
2589                         goto err_out;
2590
2591         }
2592
2593 err_out:
2594         ext2fs_free_mem(&block_buf);
2595         ext2fs_close_inode_scan(scan);
2596
2597         return retval;
2598 }
2599
2600 /*
2601  * We need to scan for inode and block bitmaps that may need to be
2602  * moved.  This can take place if the filesystem was formatted for
2603  * RAID arrays using the mke2fs's extended option "stride".
2604  */
2605 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2606 {
2607         dgrp_t i;
2608         blk64_t blk, new_blk;
2609
2610         for (i = 0; i < fs->group_desc_count; i++) {
2611                 blk = ext2fs_block_bitmap_loc(fs, i);
2612                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2613                         new_blk = translate_block(blk);
2614                         if (!new_blk)
2615                                 continue;
2616                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2617                 }
2618
2619                 blk = ext2fs_inode_bitmap_loc(fs, i);
2620                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2621                         new_blk = translate_block(blk);
2622                         if (!new_blk)
2623                                 continue;
2624                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2625                 }
2626         }
2627         return 0;
2628 }
2629
2630 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2631 {
2632         dgrp_t i;
2633         blk64_t blk;
2634         errcode_t retval;
2635         int new_ino_blks_per_grp;
2636         unsigned int j;
2637         char *old_itable = NULL, *new_itable = NULL;
2638         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2639         unsigned long old_ino_size;
2640         int old_itable_size, new_itable_size;
2641
2642         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2643         old_ino_size = EXT2_INODE_SIZE(fs->super);
2644
2645         new_ino_blks_per_grp = ext2fs_div_ceil(
2646                                         EXT2_INODES_PER_GROUP(fs->super) *
2647                                         new_ino_size,
2648                                         fs->blocksize);
2649
2650         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2651
2652         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2653         if (retval)
2654                 return retval;
2655
2656         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2657         if (retval)
2658                 goto err_out;
2659
2660         tmp_old_itable = old_itable;
2661         tmp_new_itable = new_itable;
2662
2663         for (i = 0; i < fs->group_desc_count; i++) {
2664                 blk = ext2fs_inode_table_loc(fs, i);
2665                 retval = io_channel_read_blk64(fs->io, blk,
2666                                 fs->inode_blocks_per_group, old_itable);
2667                 if (retval)
2668                         goto err_out;
2669
2670                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2671                         memcpy(new_itable, old_itable, old_ino_size);
2672
2673                         memset(new_itable+old_ino_size, 0,
2674                                         new_ino_size - old_ino_size);
2675
2676                         new_itable += new_ino_size;
2677                         old_itable += old_ino_size;
2678                 }
2679
2680                 /* reset the pointer */
2681                 old_itable = tmp_old_itable;
2682                 new_itable = tmp_new_itable;
2683
2684                 retval = io_channel_write_blk64(fs->io, blk,
2685                                         new_ino_blks_per_grp, new_itable);
2686                 if (retval)
2687                         goto err_out;
2688         }
2689
2690         /* Update the meta data */
2691         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2692         ext2fs_free_inode_cache(fs->icache);
2693         fs->icache = 0;
2694         fs->super->s_inode_size = new_ino_size;
2695
2696 err_out:
2697         if (old_itable)
2698                 ext2fs_free_mem(&old_itable);
2699
2700         if (new_itable)
2701                 ext2fs_free_mem(&new_itable);
2702
2703         return retval;
2704 }
2705
2706
2707 #define list_for_each_safe(pos, pnext, head) \
2708         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2709              pos = pnext, pnext = pos->next)
2710
2711 static void free_blk_move_list(void)
2712 {
2713         struct list_head *entry, *tmp;
2714         struct blk_move *bmv;
2715
2716         list_for_each_safe(entry, tmp, &blk_move_list) {
2717                 bmv = list_entry(entry, struct blk_move, list);
2718                 list_del(entry);
2719                 ext2fs_free_mem(&bmv);
2720         }
2721         return;
2722 }
2723
2724 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2725 {
2726         errcode_t retval;
2727         int new_ino_blks_per_grp;
2728         ext2fs_block_bitmap bmap;
2729
2730         retval = ext2fs_read_inode_bitmap(fs);
2731         if (retval) {
2732                 fputs(_("Failed to read inode bitmap\n"), stderr);
2733                 return retval;
2734         }
2735         retval = ext2fs_read_block_bitmap(fs);
2736         if (retval) {
2737                 fputs(_("Failed to read block bitmap\n"), stderr);
2738                 return retval;
2739         }
2740         INIT_LIST_HEAD(&blk_move_list);
2741
2742
2743         new_ino_blks_per_grp = ext2fs_div_ceil(
2744                                         EXT2_INODES_PER_GROUP(fs->super)*
2745                                         new_size,
2746                                         fs->blocksize);
2747
2748         /* We may change the file system.
2749          * Mark the file system as invalid so that
2750          * the user is prompted to run fsck.
2751          */
2752         fs->super->s_state &= ~EXT2_VALID_FS;
2753
2754         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2755                                                 &bmap);
2756         if (retval) {
2757                 fputs(_("Failed to allocate block bitmap when "
2758                                 "increasing inode size\n"), stderr);
2759                 return retval;
2760         }
2761         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2762         if (retval) {
2763                 fputs(_("Not enough space to increase inode size \n"), stderr);
2764                 goto err_out;
2765         }
2766         retval = move_block(fs, bmap);
2767         if (retval) {
2768                 fputs(_("Failed to relocate blocks during inode resize \n"),
2769                       stderr);
2770                 goto err_out;
2771         }
2772         retval = inode_scan_and_fix(fs, bmap);
2773         if (retval)
2774                 goto err_out_undo;
2775
2776         retval = group_desc_scan_and_fix(fs, bmap);
2777         if (retval)
2778                 goto err_out_undo;
2779
2780         retval = expand_inode_table(fs, new_size);
2781         if (retval)
2782                 goto err_out_undo;
2783
2784         ext2fs_calculate_summary_stats(fs, 1 /* super only */);
2785
2786         fs->super->s_state |= EXT2_VALID_FS;
2787         /* mark super block and block bitmap as dirty */
2788         ext2fs_mark_super_dirty(fs);
2789         ext2fs_mark_bb_dirty(fs);
2790
2791 err_out:
2792         free_blk_move_list();
2793         ext2fs_free_block_bitmap(bmap);
2794
2795         return retval;
2796
2797 err_out_undo:
2798         free_blk_move_list();
2799         ext2fs_free_block_bitmap(bmap);
2800         fputs(_("Error in resizing the inode size.\n"
2801                         "Run e2undo to undo the "
2802                         "file system changes. \n"), stderr);
2803
2804         return retval;
2805 }
2806
2807 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2808 {
2809         errcode_t retval = 0;
2810         const char *tdb_dir;
2811         char *tdb_file = NULL;
2812         char *dev_name, *tmp_name;
2813
2814         /* (re)open a specific undo file */
2815         if (undo_file && undo_file[0] != 0) {
2816                 retval = set_undo_io_backing_manager(*io_ptr);
2817                 if (retval)
2818                         goto err;
2819                 *io_ptr = undo_io_manager;
2820                 retval = set_undo_io_backup_file(undo_file);
2821                 if (retval)
2822                         goto err;
2823                 printf(_("Overwriting existing filesystem; this can be undone "
2824                          "using the command:\n"
2825                          "    e2undo %s %s\n\n"),
2826                          undo_file, name);
2827                 return retval;
2828         }
2829
2830         /*
2831          * Configuration via a conf file would be
2832          * nice
2833          */
2834         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2835         if (!tdb_dir)
2836                 tdb_dir = "/var/lib/e2fsprogs";
2837
2838         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2839             access(tdb_dir, W_OK))
2840                 return 0;
2841
2842         tmp_name = strdup(name);
2843         if (!tmp_name)
2844                 goto errout;
2845         dev_name = basename(tmp_name);
2846         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2847         if (!tdb_file) {
2848                 free(tmp_name);
2849                 goto errout;
2850         }
2851         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2852         free(tmp_name);
2853
2854         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2855                 retval = errno;
2856                 com_err(program_name, retval,
2857                         _("while trying to delete %s"), tdb_file);
2858                 goto errout;
2859         }
2860
2861         retval = set_undo_io_backing_manager(*io_ptr);
2862         if (retval)
2863                 goto errout;
2864         *io_ptr = undo_io_manager;
2865         retval = set_undo_io_backup_file(tdb_file);
2866         if (retval)
2867                 goto errout;
2868         printf(_("Overwriting existing filesystem; this can be undone "
2869                  "using the command:\n"
2870                  "    e2undo %s %s\n\n"),
2871                  tdb_file, name);
2872
2873         free(tdb_file);
2874         return 0;
2875 errout:
2876         free(tdb_file);
2877 err:
2878         com_err("tune2fs", retval, "while trying to setup undo file\n");
2879         return retval;
2880 }
2881
2882 static int
2883 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2884 {
2885         int retval, nr_users, start;
2886         journal_superblock_t *jsb;
2887         ext2_filsys jfs;
2888         __u8 *j_uuid;
2889         char *journal_path;
2890         char uuid[UUID_STR_SIZE];
2891         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2892
2893         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2894                 return 0;
2895
2896         uuid_unparse(sb->s_journal_uuid, uuid);
2897         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2898         if (!journal_path)
2899                 return 0;
2900
2901         retval = ext2fs_open2(journal_path, io_options,
2902                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2903                               0, 0, unix_io_manager, &jfs);
2904         if (retval) {
2905                 com_err(program_name, retval,
2906                         _("while trying to open %s"),
2907                         journal_path);
2908                 return retval;
2909         }
2910
2911         retval = get_journal_sb(jfs, buf);
2912         if (retval != 0) {
2913                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2914                         fprintf(stderr, _("%s is not a journal device.\n"),
2915                                 journal_path);
2916                 return retval;
2917         }
2918
2919         jsb = (journal_superblock_t *) buf;
2920         /* Find the filesystem UUID */
2921         nr_users = ntohl(jsb->s_nr_users);
2922         if (nr_users > JBD2_USERS_MAX) {
2923                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2924                                  "is too high (%d).\n"), nr_users);
2925                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2926         }
2927
2928         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2929         if (j_uuid == NULL) {
2930                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2931                       stderr);
2932                 return EXT2_ET_LOAD_EXT_JOURNAL;
2933         }
2934
2935         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2936
2937         start = ext2fs_journal_sb_start(jfs->blocksize);
2938         /* Write back the journal superblock */
2939         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2940         if (retval != 0) {
2941                 com_err(program_name, retval,
2942                         "while writing journal superblock.");
2943                 return retval;
2944         }
2945
2946         ext2fs_close(jfs);
2947
2948         return 0;
2949 }
2950
2951 #ifndef BUILD_AS_LIB
2952 int main(int argc, char **argv)
2953 #else
2954 int tune2fs_main(int argc, char **argv)
2955 #endif  /* BUILD_AS_LIB */
2956 {
2957         errcode_t retval;
2958         ext2_filsys fs;
2959         struct ext2_super_block *sb;
2960         io_manager io_ptr, io_ptr_orig = NULL;
2961         int rc = 0;
2962         char default_undo_file[1] = { 0 };
2963
2964 #ifdef ENABLE_NLS
2965         setlocale(LC_MESSAGES, "");
2966         setlocale(LC_CTYPE, "");
2967         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2968         textdomain(NLS_CAT_NAME);
2969         set_com_err_gettext(gettext);
2970 #endif
2971         if (argc && *argv)
2972                 program_name = *argv;
2973         add_error_table(&et_ext2_error_table);
2974
2975 #ifdef CONFIG_BUILD_FINDFS
2976         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2977                 do_findfs(argc, argv);
2978 #endif
2979         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2980                 parse_e2label_options(argc, argv);
2981         else
2982                 parse_tune2fs_options(argc, argv);
2983
2984 #ifdef CONFIG_TESTIO_DEBUG
2985         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2986                 io_ptr = test_io_manager;
2987                 test_io_backing_manager = unix_io_manager;
2988         } else
2989 #endif
2990                 io_ptr = unix_io_manager;
2991
2992 retry_open:
2993         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2994                 open_flag |= EXT2_FLAG_SKIP_MMP;
2995
2996         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
2997                 EXT2_FLAG_JOURNAL_DEV_OK;
2998
2999         /* keep the filesystem struct around to dump MMP data */
3000         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
3001
3002         retval = ext2fs_open2(device_name, io_options, open_flag,
3003                               0, 0, io_ptr, &fs);
3004         if (retval) {
3005                 com_err(program_name, retval,
3006                         _("while trying to open %s"),
3007                         device_name);
3008                 if (retval == EXT2_ET_MMP_FSCK_ON ||
3009                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
3010                         dump_mmp_msg(fs->mmp_buf,
3011                                      _("If you are sure the filesystem "
3012                                        "is not in use on any node, run:\n"
3013                                        "'tune2fs -f -E clear_mmp {device}'\n"));
3014                 else if (retval == EXT2_ET_MMP_FAILED)
3015                         dump_mmp_msg(fs->mmp_buf, NULL);
3016                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
3017                         fprintf(stderr,
3018                                 _("MMP block magic is bad. Try to fix it by "
3019                                   "running:\n'e2fsck -f %s'\n"), device_name);
3020                 else if (retval == EXT2_ET_BAD_MAGIC)
3021                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
3022                 else if (retval != EXT2_ET_MMP_FAILED)
3023                         fprintf(stderr, "%s",
3024                              _("Couldn't find valid filesystem superblock.\n"));
3025
3026                 ext2fs_free(fs);
3027                 exit(1);
3028         }
3029         if (ext2fs_has_feature_journal_dev(fs->super)) {
3030                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
3031                 ext2fs_free(fs);
3032                 exit(1);
3033         }
3034         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
3035
3036         if (I_flag) {
3037                 /*
3038                  * Check the inode size is right so we can issue an
3039                  * error message and bail before setting up the tdb
3040                  * file.
3041                  */
3042                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
3043                         fprintf(stderr, _("The inode size is already %lu\n"),
3044                                 new_inode_size);
3045                         rc = 1;
3046                         goto closefs;
3047                 }
3048                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3049                         fprintf(stderr, "%s",
3050                                 _("Shrinking inode size is not supported\n"));
3051                         rc = 1;
3052                         goto closefs;
3053                 }
3054                 if (new_inode_size > fs->blocksize) {
3055                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3056                                 new_inode_size, fs->blocksize);
3057                         rc = 1;
3058                         goto closefs;
3059                 }
3060                 rc = check_fsck_needed(fs,
3061                         _("Resizing inodes could take some time."));
3062                 if (rc)
3063                         goto closefs;
3064                 /*
3065                  * If inode resize is requested use the
3066                  * Undo I/O manager
3067                  */
3068                 undo_file = default_undo_file;
3069         }
3070
3071         /* Set up an undo file */
3072         if (undo_file && io_ptr_orig == NULL) {
3073                 io_ptr_orig = io_ptr;
3074                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3075                 if (retval) {
3076                         rc = 1;
3077                         goto closefs;
3078                 }
3079                 if (io_ptr != io_ptr_orig) {
3080                         ext2fs_close_free(&fs);
3081                         goto retry_open;
3082                 }
3083         }
3084
3085         sb = fs->super;
3086         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3087
3088         if (print_label) {
3089                 /* For e2label emulation */
3090                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3091                 remove_error_table(&et_ext2_error_table);
3092                 goto closefs;
3093         }
3094
3095         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3096         if (retval) {
3097                 com_err("ext2fs_check_if_mount", retval,
3098                         _("while determining whether %s is mounted."),
3099                         device_name);
3100                 rc = 1;
3101                 goto closefs;
3102         }
3103
3104 #ifdef NO_RECOVERY
3105         /* Warn if file system needs recovery and it is opened for writing. */
3106         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3107             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3108             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3109                 fprintf(stderr,
3110 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3111   "\te2fsck -E journal_only %s\n\n"
3112   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3113   "by journal recovery.\n"), device_name);
3114         }
3115 #else
3116         /* Recover the journal if possible. */
3117         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3118             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3119                 printf(_("Recovering journal.\n"));
3120                 retval = ext2fs_run_ext3_journal(&fs);
3121                 if (retval) {
3122                         com_err("tune2fs", retval,
3123                                 "while recovering journal.\n");
3124                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3125                         if (fs)
3126                                 ext2fs_close_free(&fs);
3127                         rc = 1;
3128                         goto closefs;
3129                 }
3130                 sb = fs->super;
3131         }
3132 #endif
3133
3134         /* Normally we only need to write out the superblock */
3135         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3136
3137         if (c_flag) {
3138                 if (max_mount_count == 65536)
3139                         max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
3140                                 (random() % EXT2_DFL_MAX_MNT_COUNT);
3141                 sb->s_max_mnt_count = max_mount_count;
3142                 ext2fs_mark_super_dirty(fs);
3143                 printf(_("Setting maximal mount count to %d\n"),
3144                        max_mount_count);
3145         }
3146         if (C_flag) {
3147                 sb->s_mnt_count = mount_count;
3148                 ext2fs_mark_super_dirty(fs);
3149                 printf(_("Setting current mount count to %d\n"), mount_count);
3150         }
3151         if (e_flag) {
3152                 sb->s_errors = errors;
3153                 ext2fs_mark_super_dirty(fs);
3154                 printf(_("Setting error behavior to %d\n"), errors);
3155         }
3156         if (g_flag) {
3157                 sb->s_def_resgid = resgid;
3158                 ext2fs_mark_super_dirty(fs);
3159                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3160         }
3161         if (i_flag) {
3162                 if ((unsigned long long)interval >= (1ULL << 32)) {
3163                         com_err(program_name, 0,
3164                                 _("interval between checks is too big (%lu)"),
3165                                 interval);
3166                         rc = 1;
3167                         goto closefs;
3168                 }
3169                 sb->s_checkinterval = interval;
3170                 ext2fs_mark_super_dirty(fs);
3171                 printf(_("Setting interval between checks to %lu seconds\n"),
3172                        interval);
3173         }
3174         if (m_flag) {
3175                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3176                                           ext2fs_blocks_count(sb) / 100.0);
3177                 ext2fs_mark_super_dirty(fs);
3178                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3179                         reserved_ratio,
3180                         (unsigned long long) ext2fs_r_blocks_count(sb));
3181         }
3182         if (r_flag) {
3183                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3184                         com_err(program_name, 0,
3185                                 _("reserved blocks count is too big (%llu)"),
3186                                 (unsigned long long) reserved_blocks);
3187                         rc = 1;
3188                         goto closefs;
3189                 }
3190                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3191                 ext2fs_mark_super_dirty(fs);
3192                 printf(_("Setting reserved blocks count to %llu\n"),
3193                        (unsigned long long) reserved_blocks);
3194         }
3195         if (s_flag == 1) {
3196                 if (ext2fs_has_feature_sparse_super(sb)) {
3197                         fputs(_("\nThe filesystem already has sparse "
3198                                 "superblocks.\n"), stderr);
3199                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3200                         fputs(_("\nSetting the sparse superblock flag not "
3201                                 "supported\nfor filesystems with "
3202                                 "the meta_bg feature enabled.\n"),
3203                                 stderr);
3204                         rc = 1;
3205                         goto closefs;
3206                 } else {
3207                         ext2fs_set_feature_sparse_super(sb);
3208                         sb->s_state &= ~EXT2_VALID_FS;
3209                         ext2fs_mark_super_dirty(fs);
3210                         printf(_("\nSparse superblock flag set.  %s"),
3211                                _(please_fsck));
3212                 }
3213         }
3214         if (s_flag == 0) {
3215                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3216                       stderr);
3217                 rc = 1;
3218                 goto closefs;
3219         }
3220         if (T_flag) {
3221                 sb->s_lastcheck = last_check_time;
3222                 ext2fs_mark_super_dirty(fs);
3223                 printf(_("Setting time filesystem last checked to %s\n"),
3224                        ctime(&last_check_time));
3225         }
3226         if (u_flag) {
3227                 sb->s_def_resuid = resuid;
3228                 ext2fs_mark_super_dirty(fs);
3229                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3230         }
3231         if (L_flag) {
3232                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3233                         fputs(_("Warning: label too long, truncating.\n"),
3234                               stderr);
3235                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3236                 strncpy((char *)sb->s_volume_name, new_label,
3237                         sizeof(sb->s_volume_name));
3238                 ext2fs_mark_super_dirty(fs);
3239         }
3240         if (M_flag) {
3241                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3242                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3243                         sizeof(sb->s_last_mounted));
3244                 ext2fs_mark_super_dirty(fs);
3245         }
3246         if (mntopts_cmd) {
3247                 rc = update_mntopts(fs, mntopts_cmd);
3248                 if (rc)
3249                         goto closefs;
3250         }
3251         if (features_cmd) {
3252                 rc = update_feature_set(fs, features_cmd);
3253                 if (rc)
3254                         goto closefs;
3255         }
3256         if (extended_cmd) {
3257                 rc = parse_extended_opts(fs, extended_cmd);
3258                 if (rc)
3259                         goto closefs;
3260                 if (clear_mmp && !f_flag) {
3261                         fputs(_("Error in using clear_mmp. "
3262                                 "It must be used with -f\n"),
3263                               stderr);
3264                         goto closefs;
3265                 }
3266         }
3267         if (clear_mmp) {
3268                 rc = ext2fs_mmp_clear(fs);
3269                 goto closefs;
3270         }
3271         if (journal_size || journal_device) {
3272                 rc = add_journal(fs);
3273                 if (rc)
3274                         goto closefs;
3275         }
3276
3277         if (Q_flag) {
3278                 if (mount_flags & EXT2_MF_MOUNTED) {
3279                         fputs(_("The quota feature may only be changed when "
3280                                 "the filesystem is unmounted.\n"), stderr);
3281                         rc = 1;
3282                         goto closefs;
3283                 }
3284                 rc = handle_quota_options(fs);
3285                 if (rc)
3286                         goto closefs;
3287         }
3288
3289         if (U_flag) {
3290                 int set_csum = 0;
3291                 dgrp_t i;
3292                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3293                 __u8 old_uuid[UUID_SIZE];
3294
3295                 if (ext2fs_has_feature_stable_inodes(fs->super)) {
3296                         fputs(_("Cannot change the UUID of this filesystem "
3297                                 "because it has the stable_inodes feature "
3298                                 "flag.\n"), stderr);
3299                         exit(1);
3300                 }
3301
3302                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3303                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3304                      ext2fs_has_feature_ea_inode(fs->super))) {
3305                         rc = check_fsck_needed(fs,
3306                                 _("Setting the UUID on this "
3307                                   "filesystem could take some time."));
3308                         if (rc)
3309                                 goto closefs;
3310                         rewrite_checksums = REWRITE_ALL;
3311                 }
3312
3313                 if (ext2fs_has_group_desc_csum(fs)) {
3314                         /*
3315                          * Changing the UUID on a metadata_csum FS requires
3316                          * rewriting all metadata, which can race with a
3317                          * mounted fs.  Don't allow that unless we're saving
3318                          * the checksum seed.
3319                          */
3320                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3321                             !ext2fs_has_feature_csum_seed(fs->super) &&
3322                             ext2fs_has_feature_metadata_csum(fs->super)) {
3323                                 fputs(_("The UUID may only be "
3324                                         "changed when the filesystem is "
3325                                         "unmounted.\n"), stderr);
3326                                 fputs(_("If you only use kernels newer than "
3327                                         "v4.4, run 'tune2fs -O "
3328                                         "metadata_csum_seed' and re-run this "
3329                                         "command.\n"), stderr);
3330                                 try_confirm_csum_seed_support();
3331                                 rc = 1;
3332                                 goto closefs;
3333                         }
3334
3335                         /*
3336                          * Determine if the block group checksums are
3337                          * correct so we know whether or not to set
3338                          * them later on.
3339                          */
3340                         for (i = 0; i < fs->group_desc_count; i++)
3341                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3342                                         break;
3343                         if (i >= fs->group_desc_count)
3344                                 set_csum = 1;
3345                 }
3346
3347                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3348                 if ((strcasecmp(new_UUID, "null") == 0) ||
3349                     (strcasecmp(new_UUID, "clear") == 0)) {
3350                         uuid_clear(sb->s_uuid);
3351                 } else if (strcasecmp(new_UUID, "time") == 0) {
3352                         uuid_generate_time(sb->s_uuid);
3353                 } else if (strcasecmp(new_UUID, "random") == 0) {
3354                         uuid_generate(sb->s_uuid);
3355                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3356                         com_err(program_name, 0, "%s",
3357                                 _("Invalid UUID format\n"));
3358                         rc = 1;
3359                         goto closefs;
3360                 }
3361                 ext2fs_init_csum_seed(fs);
3362                 if (set_csum) {
3363                         for (i = 0; i < fs->group_desc_count; i++)
3364                                 ext2fs_group_desc_csum_set(fs, i);
3365                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3366                 }
3367
3368                 /* If this is a journal dev, we need to copy UUID into jsb */
3369                 if (!(rc = get_journal_sb(fs, buf))) {
3370                         journal_superblock_t *jsb;
3371
3372                         jsb = (journal_superblock_t *) buf;
3373                         fputs(_("Need to update journal superblock.\n"), stdout);
3374                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3375
3376                         /* Writeback the journal superblock */
3377                         if ((rc = io_channel_write_blk64(fs->io,
3378                                 ext2fs_journal_sb_start(fs->blocksize),
3379                                         -SUPERBLOCK_SIZE, buf)))
3380                                 goto closefs;
3381                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3382                         goto closefs;
3383                 else {
3384                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3385
3386                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3387                                 goto closefs;
3388                 }
3389
3390                 ext2fs_mark_super_dirty(fs);
3391         }
3392
3393         if (I_flag) {
3394                 if (mount_flags & EXT2_MF_MOUNTED) {
3395                         fputs(_("The inode size may only be "
3396                                 "changed when the filesystem is "
3397                                 "unmounted.\n"), stderr);
3398                         rc = 1;
3399                         goto closefs;
3400                 }
3401                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3402                         fputs(_("Changing the inode size not supported for "
3403                                 "filesystems with the flex_bg\n"
3404                                 "feature enabled.\n"),
3405                               stderr);
3406                         rc = 1;
3407                         goto closefs;
3408                 }
3409                 /*
3410                  * We want to update group descriptor also
3411                  * with the new free inode count
3412                  */
3413                 if (rewrite_checksums)
3414                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3415                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3416                 retval = resize_inode(fs, new_inode_size);
3417                 if (rewrite_checksums)
3418                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3419                 if (retval == 0) {
3420                         printf(_("Setting inode size %lu\n"),
3421                                                         new_inode_size);
3422                         rewrite_checksums = REWRITE_ALL;
3423                 } else {
3424                         printf("%s", _("Failed to change inode size\n"));
3425                         rc = 1;
3426                         goto closefs;
3427                 }
3428         }
3429
3430         if (rewrite_checksums)
3431                 rewrite_metadata_checksums(fs, rewrite_checksums);
3432
3433         if (l_flag)
3434                 list_super(sb);
3435         if (stride_set) {
3436                 sb->s_raid_stride = stride;
3437                 ext2fs_mark_super_dirty(fs);
3438                 printf(_("Setting stride size to %d\n"), stride);
3439         }
3440         if (stripe_width_set) {
3441                 sb->s_raid_stripe_width = stripe_width;
3442                 ext2fs_mark_super_dirty(fs);
3443                 printf(_("Setting stripe width to %d\n"), stripe_width);
3444         }
3445         if (ext_mount_opts) {
3446                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3447                         sizeof(fs->super->s_mount_opts));
3448                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3449                 ext2fs_mark_super_dirty(fs);
3450                 printf(_("Setting extended default mount options to '%s'\n"),
3451                        ext_mount_opts);
3452                 free(ext_mount_opts);
3453         }
3454
3455         free(device_name);
3456         remove_error_table(&et_ext2_error_table);
3457
3458 closefs:
3459         if (rc) {
3460                 ext2fs_mmp_stop(fs);
3461 #ifndef BUILD_AS_LIB
3462                 exit(1);
3463 #endif
3464         }
3465
3466         if (feature_64bit)
3467                 convert_64bit(fs, feature_64bit);
3468         return (ext2fs_close_free(&fs) ? 1 : 0);
3469 }