misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104
 105 int journal_size, journal_flags;
 106 char *journal_device;
 107 static blk64_t journal_location = ~0LL;
 108
 109 static struct list_head blk_move_list;
 110
 111 struct blk_move {
 112         struct list_head list;
 113         blk64_t old_loc;
 114         blk64_t new_loc;
 115 };
 116
 117 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 118
 119 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 120 static const char *please_dir_fsck =
 121                 N_("Please run e2fsck -fD on the filesystem.\n");
 122
 123 #ifdef CONFIG_BUILD_FINDFS
 124 void do_findfs(int argc, char **argv);
 125 #endif
 126
 127 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 128 int journal_enable_debug = -1;
 129 #endif
 130
 131 static void usage(void)
 132 {
 133         fprintf(stderr,
 134                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 135                   "[-g group]\n"
 136                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 137                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 138                   "\t[-p mmp_update_interval] [-r reserved_blocks_count] "
 139                   "[-u user]\n"
 140                   "\t[-C mount_count] [-L volume_label] [-M last_mounted_dir]\n"
 141                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 142                   "\t[-E extended-option[,...]] [-T last_check_time] "
 143                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 144                 program_name);
 145         exit(1);
 146 }
 147
 148 static __u32 ok_features[3] = {
 149         /* Compat */
 150         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 151                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 152         /* Incompat */
 153         EXT2_FEATURE_INCOMPAT_FILETYPE |
 154                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 155                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 156                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 157                 EXT4_FEATURE_INCOMPAT_MMP |
 158                 EXT4_FEATURE_INCOMPAT_64BIT |
 159                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 160                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 161                 EXT4_FEATURE_INCOMPAT_LARGEDIR,
 162         /* R/O compat */
 163         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 164                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 165                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 166                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 167                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 168                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 169                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 170                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 171                 EXT4_FEATURE_RO_COMPAT_READONLY |
 172                 EXT4_FEATURE_RO_COMPAT_PROJECT
 173 };
 174
 175 static __u32 clear_ok_features[3] = {
 176         /* Compat */
 177         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 178                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 179                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 180         /* Incompat */
 181         EXT2_FEATURE_INCOMPAT_FILETYPE |
 182                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 183                 EXT4_FEATURE_INCOMPAT_MMP |
 184                 EXT4_FEATURE_INCOMPAT_64BIT |
 185                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 186         /* R/O compat */
 187         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 188                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 189                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 190                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 191                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 192                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 193                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 194                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 195                 EXT4_FEATURE_RO_COMPAT_READONLY
 196 };
 197
 198 /**
 199  * Try to get journal super block if any
 200  */
 201 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 202 {
 203         int retval;
 204         journal_superblock_t *jsb;
 205
 206         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 207                 return EXT2_ET_UNSUPP_FEATURE;
 208         }
 209
 210         /* Get the journal superblock */
 211         if ((retval = io_channel_read_blk64(jfs->io,
 212             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 213                 com_err(program_name, retval, "%s",
 214                 _("while reading journal superblock"));
 215                 return retval;
 216         }
 217
 218         jsb = (journal_superblock_t *) buf;
 219         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 220             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 221                 fputs(_("Journal superblock not found!\n"), stderr);
 222                 return EXT2_ET_BAD_MAGIC;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 229                           int nr_users)
 230 {
 231         int i;
 232         for (i = 0; i < nr_users; i++) {
 233                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 234                         return &s_users[i * UUID_SIZE];
 235         }
 236
 237         return NULL;
 238 }
 239
 240 /*
 241  * Remove an external journal from the filesystem
 242  */
 243 static int remove_journal_device(ext2_filsys fs)
 244 {
 245         char            *journal_path;
 246         ext2_filsys     jfs;
 247         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 248         journal_superblock_t    *jsb;
 249         int             i, nr_users;
 250         errcode_t       retval;
 251         int             commit_remove_journal = 0;
 252         io_manager      io_ptr;
 253
 254         if (f_flag)
 255                 commit_remove_journal = 1; /* force removal even if error */
 256
 257         uuid_unparse(fs->super->s_journal_uuid, buf);
 258         journal_path = blkid_get_devname(NULL, "UUID", buf);
 259
 260         if (!journal_path) {
 261                 journal_path =
 262                         ext2fs_find_block_device(fs->super->s_journal_dev);
 263                 if (!journal_path)
 264                         goto no_valid_journal;
 265         }
 266
 267 #ifdef CONFIG_TESTIO_DEBUG
 268         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 269                 io_ptr = test_io_manager;
 270                 test_io_backing_manager = unix_io_manager;
 271         } else
 272 #endif
 273                 io_ptr = unix_io_manager;
 274         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 275                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 276                              fs->blocksize, io_ptr, &jfs);
 277         if (retval) {
 278                 com_err(program_name, retval, "%s",
 279                         _("while trying to open external journal"));
 280                 goto no_valid_journal;
 281         }
 282
 283         if ((retval = get_journal_sb(jfs, buf))) {
 284                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 285                         fprintf(stderr, _("%s is not a journal device.\n"),
 286                                 journal_path);
 287                 goto no_valid_journal;
 288         }
 289
 290         jsb = (journal_superblock_t *) buf;
 291         /* Find the filesystem UUID */
 292         nr_users = ntohl(jsb->s_nr_users);
 293
 294         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 295                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 296                       stderr);
 297                 commit_remove_journal = 1;
 298                 goto no_valid_journal;
 299         }
 300         nr_users--;
 301         for (i = 0; i < nr_users; i++)
 302                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 303         jsb->s_nr_users = htonl(nr_users);
 304
 305         /* Write back the journal superblock */
 306         retval = io_channel_write_blk64(jfs->io,
 307                                         ext2fs_journal_sb_start(fs->blocksize),
 308                                         -SUPERBLOCK_SIZE, buf);
 309         if (retval) {
 310                 com_err(program_name, retval,
 311                         "while writing journal superblock.");
 312                 goto no_valid_journal;
 313         }
 314
 315         commit_remove_journal = 1;
 316
 317 no_valid_journal:
 318         if (commit_remove_journal == 0) {
 319                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 320                         "Use -f option to remove missing journal device.\n"),
 321                       stderr);
 322                 return 1;
 323         }
 324         fs->super->s_journal_dev = 0;
 325         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 326         uuid_clear(fs->super->s_journal_uuid);
 327         ext2fs_mark_super_dirty(fs);
 328         fputs(_("Journal removed\n"), stdout);
 329         free(journal_path);
 330
 331         return 0;
 332 }
 333
 334 /* Helper function for remove_journal_inode */
 335 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 336                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 337                                blk64_t ref_block EXT2FS_ATTR((unused)),
 338                                int ref_offset EXT2FS_ATTR((unused)),
 339                                void *private EXT2FS_ATTR((unused)))
 340 {
 341         blk64_t block;
 342         int     group;
 343
 344         block = *blocknr;
 345         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 346         group = ext2fs_group_of_blk2(fs, block);
 347         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 348         ext2fs_group_desc_csum_set(fs, group);
 349         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 350         return 0;
 351 }
 352
 353 /*
 354  * Remove the journal inode from the filesystem
 355  */
 356 static errcode_t remove_journal_inode(ext2_filsys fs)
 357 {
 358         struct ext2_inode       inode;
 359         errcode_t               retval;
 360         ino_t                   ino = fs->super->s_journal_inum;
 361
 362         retval = ext2fs_read_inode(fs, ino,  &inode);
 363         if (retval) {
 364                 com_err(program_name, retval, "%s",
 365                         _("while reading journal inode"));
 366                 return retval;
 367         }
 368         if (ino == EXT2_JOURNAL_INO) {
 369                 retval = ext2fs_read_bitmaps(fs);
 370                 if (retval) {
 371                         com_err(program_name, retval, "%s",
 372                                 _("while reading bitmaps"));
 373                         return retval;
 374                 }
 375                 retval = ext2fs_block_iterate3(fs, ino,
 376                                                BLOCK_FLAG_READ_ONLY, NULL,
 377                                                release_blocks_proc, NULL);
 378                 if (retval) {
 379                         com_err(program_name, retval, "%s",
 380                                 _("while clearing journal inode"));
 381                         return retval;
 382                 }
 383                 memset(&inode, 0, sizeof(inode));
 384                 ext2fs_mark_bb_dirty(fs);
 385                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 386         } else
 387                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 388         retval = ext2fs_write_inode(fs, ino, &inode);
 389         if (retval) {
 390                 com_err(program_name, retval, "%s",
 391                         _("while writing journal inode"));
 392                 return retval;
 393         }
 394         fs->super->s_journal_inum = 0;
 395         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 396         ext2fs_mark_super_dirty(fs);
 397
 398         return 0;
 399 }
 400
 401 /*
 402  * Update the default mount options
 403  */
 404 static int update_mntopts(ext2_filsys fs, char *mntopts)
 405 {
 406         struct ext2_super_block *sb = fs->super;
 407
 408         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 409                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 410                         mntopts);
 411                 return 1;
 412         }
 413         ext2fs_mark_super_dirty(fs);
 414
 415         return 0;
 416 }
 417
 418 static void check_fsck_needed(ext2_filsys fs, const char *prompt)
 419 {
 420         /* Refuse to modify anything but a freshly checked valid filesystem. */
 421         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 422             (fs->super->s_state & EXT2_ERROR_FS) ||
 423             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 424                 printf("\n%s\n", _(please_fsck));
 425                 if (mount_flags & EXT2_MF_READONLY)
 426                         printf("%s", _("(and reboot afterwards!)\n"));
 427                 exit(1);
 428         }
 429
 430         /* Give the admin a few seconds to bail out of a dangerous op. */
 431         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 432                 return;
 433
 434         puts(prompt);
 435         proceed_question(5);
 436 }
 437
 438 static void request_dir_fsck_afterwards(ext2_filsys fs)
 439 {
 440         static int requested;
 441
 442         if (requested++)
 443                 return;
 444         fsck_requested++;
 445         fs->super->s_state &= ~EXT2_VALID_FS;
 446         printf("\n%s\n", _(please_dir_fsck));
 447         if (mount_flags & EXT2_MF_READONLY)
 448                 printf("%s", _("(and reboot afterwards!)\n"));
 449 }
 450
 451 static void request_fsck_afterwards(ext2_filsys fs)
 452 {
 453         static int requested = 0;
 454
 455         if (requested++)
 456                 return;
 457         fsck_requested++;
 458         fs->super->s_state &= ~EXT2_VALID_FS;
 459         printf("\n%s\n", _(please_fsck));
 460         if (mount_flags & EXT2_MF_READONLY)
 461                 printf("%s", _("(and reboot afterwards!)\n"));
 462 }
 463
 464 static void convert_64bit(ext2_filsys fs, int direction)
 465 {
 466         if (!direction)
 467                 return;
 468
 469         /*
 470          * Is resize2fs going to demand a fsck run? Might as well tell the
 471          * user now.
 472          */
 473         if (!fsck_requested &&
 474             ((fs->super->s_state & EXT2_ERROR_FS) ||
 475              !(fs->super->s_state & EXT2_VALID_FS) ||
 476              fs->super->s_lastcheck < fs->super->s_mtime))
 477                 request_fsck_afterwards(fs);
 478         if (fsck_requested)
 479                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 480                         direction > 0 ? "-b" : "-s", fs->device_name);
 481         else
 482                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 483                         direction > 0 ? "-b" : "-s", fs->device_name);
 484
 485         if (undo_file)
 486                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 487         if (direction > 0)
 488                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 489         else
 490                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 491 }
 492
 493 /* Rewrite extents */
 494 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 495                                  struct ext2_inode *inode)
 496 {
 497         ext2_extent_handle_t    handle;
 498         struct ext2fs_extent    extent;
 499         errcode_t               errcode;
 500         struct ext2_extent_info info;
 501
 502         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 503             !ext2fs_has_feature_metadata_csum(fs->super))
 504                 return 0;
 505
 506         errcode = ext2fs_extent_open(fs, ino, &handle);
 507         if (errcode)
 508                 return errcode;
 509
 510         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 511         if (errcode)
 512                 goto out;
 513
 514         do {
 515                 errcode = ext2fs_extent_get_info(handle, &info);
 516                 if (errcode)
 517                         break;
 518
 519                 /*
 520                  * If this is the first extent in an extent block that we
 521                  * haven't visited, rewrite the extent to force the ETB
 522                  * checksum to be rewritten.
 523                  */
 524                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 525                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 526                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 527                         if (errcode)
 528                                 break;
 529                 }
 530
 531                 /* Skip to the end of a block of leaf nodes */
 532                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 533                         errcode = ext2fs_extent_get(handle,
 534                                                     EXT2_EXTENT_LAST_SIB,
 535                                                     &extent);
 536                         if (errcode)
 537                                 break;
 538                 }
 539
 540                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 541         } while (errcode == 0);
 542
 543 out:
 544         /* Ok if we run off the end */
 545         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 546                 errcode = 0;
 547         ext2fs_extent_free(handle);
 548         return errcode;
 549 }
 550
 551 /*
 552  * Rewrite directory blocks with checksums
 553  */
 554 struct rewrite_dir_context {
 555         char *buf;
 556         errcode_t errcode;
 557         ext2_ino_t dir;
 558         int is_htree;
 559 };
 560
 561 static int rewrite_dir_block(ext2_filsys fs,
 562                              blk64_t    *blocknr,
 563                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 564                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 565                              int        ref_offset EXT2FS_ATTR((unused)),
 566                              void       *priv_data)
 567 {
 568         struct ext2_dx_countlimit *dcl = NULL;
 569         struct rewrite_dir_context *ctx = priv_data;
 570         int dcl_offset, changed = 0;
 571
 572         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 573                                               ctx->dir);
 574         if (ctx->errcode)
 575                 return BLOCK_ABORT;
 576
 577         /* if htree node... */
 578         if (ctx->is_htree)
 579                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 580                                          &dcl, &dcl_offset);
 581         if (dcl) {
 582                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 583                         /* Ensure limit is the max size */
 584                         int max_entries = (fs->blocksize - dcl_offset) /
 585                                           sizeof(struct ext2_dx_entry);
 586                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 587                                 changed = 1;
 588                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 589                         }
 590                 } else {
 591                         /* If htree block is full then rebuild the dir */
 592                         if (ext2fs_le16_to_cpu(dcl->count) ==
 593                             ext2fs_le16_to_cpu(dcl->limit)) {
 594                                 request_dir_fsck_afterwards(fs);
 595                                 return 0;
 596                         }
 597                         /*
 598                          * Ensure dcl->limit is small enough to leave room for
 599                          * the checksum tail.
 600                          */
 601                         int max_entries = (fs->blocksize - (dcl_offset +
 602                                                 sizeof(struct ext2_dx_tail))) /
 603                                           sizeof(struct ext2_dx_entry);
 604                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 605                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 606                         /* Always rewrite checksum */
 607                         changed = 1;
 608                 }
 609         } else {
 610                 unsigned int rec_len, name_size;
 611                 char *top = ctx->buf + fs->blocksize;
 612                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 613                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 614
 615                 /* Find last and penultimate dirent */
 616                 while ((char *)de < top) {
 617                         penultimate_de = last_de;
 618                         last_de = de;
 619                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 620                         if (!ctx->errcode && !rec_len)
 621                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 622                         if (ctx->errcode)
 623                                 return BLOCK_ABORT;
 624                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 625                 }
 626                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 627                 if (ctx->errcode)
 628                         return BLOCK_ABORT;
 629                 name_size = ext2fs_dirent_name_len(last_de);
 630
 631                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 632                         if (!penultimate_de)
 633                                 return 0;
 634                         if (last_de->inode ||
 635                             name_size ||
 636                             rec_len != sizeof(struct ext2_dir_entry_tail))
 637                                 return 0;
 638                         /*
 639                          * The last dirent is unused and the right length to
 640                          * have stored a checksum.  Erase it.
 641                          */
 642                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 643                                                           &rec_len);
 644                         if (!rec_len)
 645                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 646                         if (ctx->errcode)
 647                                 return BLOCK_ABORT;
 648                         ext2fs_set_rec_len(fs, rec_len +
 649                                         sizeof(struct ext2_dir_entry_tail),
 650                                         penultimate_de);
 651                         changed = 1;
 652                 } else {
 653                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 654                         struct ext2_dir_entry_tail *t;
 655
 656                         /*
 657                          * If the last dirent looks like the tail, just update
 658                          * the checksum.
 659                          */
 660                         if (!last_de->inode &&
 661                             rec_len == csum_size) {
 662                                 t = (struct ext2_dir_entry_tail *)last_de;
 663                                 t->det_reserved_name_len =
 664                                                 EXT2_DIR_NAME_LEN_CSUM;
 665                                 changed = 1;
 666                                 goto out;
 667                         }
 668                         if (name_size & 3)
 669                                 name_size = (name_size & ~3) + 4;
 670                         /* If there's not enough space for the tail, e2fsck */
 671                         if (rec_len <= (8 + name_size + csum_size)) {
 672                                 request_dir_fsck_afterwards(fs);
 673                                 return 0;
 674                         }
 675                         /* Shorten that last de and insert the tail */
 676                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 677                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 678                         ext2fs_initialize_dirent_tail(fs, t);
 679
 680                         /* Always update checksum */
 681                         changed = 1;
 682                 }
 683         }
 684
 685 out:
 686         if (!changed)
 687                 return 0;
 688
 689         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 690                                                0, ctx->dir);
 691         if (ctx->errcode)
 692                 return BLOCK_ABORT;
 693
 694         return 0;
 695 }
 696
 697 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 698                                    struct ext2_inode *inode)
 699 {
 700         errcode_t       retval;
 701         struct rewrite_dir_context ctx;
 702
 703         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 704         if (retval)
 705                 return retval;
 706
 707         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 708         ctx.dir = dir;
 709         ctx.errcode = 0;
 710         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 711                                                 BLOCK_FLAG_DATA_ONLY,
 712                                        0, rewrite_dir_block, &ctx);
 713
 714         ext2fs_free_mem(&ctx.buf);
 715         if (retval)
 716                 return retval;
 717
 718         return ctx.errcode;
 719 }
 720
 721 /*
 722  * Context information that does not change across rewrite_one_inode()
 723  * invocations.
 724  */
 725 struct rewrite_context {
 726         ext2_filsys fs;
 727         struct ext2_inode *zero_inode;
 728         char *ea_buf;
 729         int inode_size;
 730 };
 731
 732 #define fatal_err(code, args...)                \
 733         do {                                    \
 734                 com_err(__func__, code, args);  \
 735                 exit(1);                        \
 736         } while (0);
 737
 738 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 739                                  struct ext2_inode *inode)
 740 {
 741         errcode_t retval;
 742         ext2_file_t file;
 743         __u32 hash;
 744
 745         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 746         if (retval)
 747                 fatal_err(retval, "open ea_inode");
 748         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 749                                   NULL);
 750         if (retval)
 751                 fatal_err(retval, "read ea_inode");
 752         retval = ext2fs_file_close(file);
 753         if (retval)
 754                 fatal_err(retval, "close ea_inode");
 755
 756         hash = ext2fs_crc32c_le(ctx->fs->csum_seed, ctx->ea_buf, inode->i_size);
 757         ext2fs_set_ea_inode_hash(inode, hash);
 758 }
 759
 760 static int update_xattr_entry_hashes(ext2_filsys fs,
 761                                      struct ext2_ext_attr_entry *entry,
 762                                      struct ext2_ext_attr_entry *end)
 763 {
 764         int modified = 0;
 765         errcode_t retval;
 766
 767         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 768                 if (entry->e_value_inum) {
 769                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 770                                                              &entry->e_hash);
 771                         if (retval)
 772                                 fatal_err(retval, "hash ea_inode entry");
 773                         modified = 1;
 774                 }
 775                 entry = EXT2_EXT_ATTR_NEXT(entry);
 776         }
 777         return modified;
 778 }
 779
 780 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 781                                        struct ext2_inode_large *inode)
 782 {
 783         struct ext2_ext_attr_entry *start, *end;
 784         __u32 *ea_magic;
 785
 786         if (inode->i_extra_isize == 0)
 787                 return;
 788
 789         if (inode->i_extra_isize & 3 ||
 790             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 791                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 792
 793         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 794                                 inode->i_extra_isize);
 795         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 796                 return;
 797
 798         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 799         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 800
 801         update_xattr_entry_hashes(ctx->fs, start, end);
 802 }
 803
 804 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 805                                       void *block_buf)
 806 {
 807         struct ext2_ext_attr_header *header;
 808         struct ext2_ext_attr_entry *start, *end;
 809
 810         header = (struct ext2_ext_attr_header *)block_buf;
 811         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 812                 return;
 813
 814         start = (struct ext2_ext_attr_entry *)(header+1);
 815         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 816
 817         if (update_xattr_entry_hashes(ctx->fs, start, end))
 818                 ext2fs_ext_attr_block_rehash(header, end);
 819 }
 820
 821 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 822                               struct ext2_inode *inode)
 823 {
 824         blk64_t file_acl_block;
 825         errcode_t retval;
 826
 827         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 828                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 829                         return;
 830                 memset(inode, 0, ctx->inode_size);
 831         }
 832
 833         if (inode->i_flags & EXT4_EA_INODE_FL)
 834                 update_ea_inode_hash(ctx, ino, inode);
 835
 836         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 837                 update_inline_xattr_hashes(ctx,
 838                                            (struct ext2_inode_large *)inode);
 839
 840         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 841         if (retval)
 842                 fatal_err(retval, "while writing inode");
 843
 844         retval = rewrite_extents(ctx->fs, ino, inode);
 845         if (retval)
 846                 fatal_err(retval, "while rewriting extents");
 847
 848         if (LINUX_S_ISDIR(inode->i_mode) &&
 849             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 850                 retval = rewrite_directory(ctx->fs, ino, inode);
 851                 if (retval)
 852                         fatal_err(retval, "while rewriting directories");
 853         }
 854
 855         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 856         if (!file_acl_block)
 857                 return;
 858
 859         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 860                                        ino);
 861         if (retval)
 862                 fatal_err(retval, "while rewriting extended attribute");
 863
 864         update_block_xattr_hashes(ctx, ctx->ea_buf);
 865         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 866                                         ino);
 867         if (retval)
 868                 fatal_err(retval, "while rewriting extended attribute");
 869 }
 870
 871 /*
 872  * Forcibly set checksums in all inodes.
 873  */
 874 static void rewrite_inodes(ext2_filsys fs)
 875 {
 876         ext2_inode_scan scan;
 877         errcode_t       retval;
 878         ext2_ino_t      ino;
 879         struct ext2_inode *inode;
 880         int pass;
 881         struct rewrite_context ctx = {
 882                 .fs = fs,
 883                 .inode_size = EXT2_INODE_SIZE(fs->super),
 884         };
 885
 886         if (fs->super->s_creator_os == EXT2_OS_HURD)
 887                 return;
 888
 889         retval = ext2fs_get_mem(ctx.inode_size, &inode);
 890         if (retval)
 891                 fatal_err(retval, "while allocating memory");
 892
 893         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 894         if (retval)
 895                 fatal_err(retval, "while allocating memory");
 896
 897         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 898         if (retval)
 899                 fatal_err(retval, "while allocating memory");
 900
 901         /*
 902          * Extended attribute inodes have a lookup hash that needs to be
 903          * recalculated with the new csum_seed. Other inodes referencing xattr
 904          * inodes need this value to be up to date. That's why we do two passes:
 905          *
 906          * pass 1: update xattr inodes to update their lookup hash as well as
 907          *         other checksums.
 908          *
 909          * pass 2: go over other inodes to update their checksums.
 910          */
 911         if (ext2fs_has_feature_ea_inode(fs->super))
 912                 pass = 1;
 913         else
 914                 pass = 2;
 915         for (;pass <= 2; pass++) {
 916                 retval = ext2fs_open_inode_scan(fs, 0, &scan);
 917                 if (retval)
 918                         fatal_err(retval, "while opening inode scan");
 919
 920                 do {
 921                         retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 922                                                             ctx.inode_size);
 923                         if (retval)
 924                                 fatal_err(retval, "while getting next inode");
 925                         if (!ino)
 926                                 break;
 927
 928                         if (pass == 1 && (inode->i_flags & EXT4_EA_INODE_FL) ||
 929                             pass == 2 && !(inode->i_flags & EXT4_EA_INODE_FL))
 930                                 rewrite_one_inode(&ctx, ino, inode);
 931                 } while (ino);
 932
 933                 ext2fs_close_inode_scan(scan);
 934         }
 935
 936         ext2fs_free_mem(&ctx.zero_inode);
 937         ext2fs_free_mem(&ctx.ea_buf);
 938         ext2fs_free_mem(&inode);
 939 }
 940
 941 static void rewrite_metadata_checksums(ext2_filsys fs)
 942 {
 943         errcode_t retval;
 944         dgrp_t i;
 945
 946         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 947         ext2fs_init_csum_seed(fs);
 948         for (i = 0; i < fs->group_desc_count; i++)
 949                 ext2fs_group_desc_csum_set(fs, i);
 950         retval = ext2fs_read_bitmaps(fs);
 951         if (retval)
 952                 fatal_err(retval, "while reading bitmaps");
 953         rewrite_inodes(fs);
 954         ext2fs_mark_ib_dirty(fs);
 955         ext2fs_mark_bb_dirty(fs);
 956         ext2fs_mmp_update2(fs, 1);
 957         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 958         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 959         if (ext2fs_has_feature_metadata_csum(fs->super))
 960                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 961         else
 962                 fs->super->s_checksum_type = 0;
 963         ext2fs_mark_super_dirty(fs);
 964 }
 965
 966 static void enable_uninit_bg(ext2_filsys fs)
 967 {
 968         struct ext2_group_desc *gd;
 969         dgrp_t i;
 970
 971         for (i = 0; i < fs->group_desc_count; i++) {
 972                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 973                 gd->bg_itable_unused = 0;
 974                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 975                 ext2fs_group_desc_csum_set(fs, i);
 976         }
 977         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 978 }
 979
 980 static errcode_t zero_empty_inodes(ext2_filsys fs)
 981 {
 982         int length = EXT2_INODE_SIZE(fs->super);
 983         struct ext2_inode *inode = NULL;
 984         ext2_inode_scan scan;
 985         errcode_t       retval;
 986         ext2_ino_t      ino;
 987
 988         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 989         if (retval)
 990                 goto out;
 991
 992         retval = ext2fs_get_mem(length, &inode);
 993         if (retval)
 994                 goto out;
 995
 996         do {
 997                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 998                 if (retval)
 999                         goto out;
1000                 if (!ino)
1001                         break;
1002                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
1003                         memset(inode, 0, length);
1004                         retval = ext2fs_write_inode_full(fs, ino, inode,
1005                                                          length);
1006                         if (retval)
1007                                 goto out;
1008                 }
1009         } while (1);
1010
1011 out:
1012         ext2fs_free_mem(&inode);
1013         ext2fs_close_inode_scan(scan);
1014         return retval;
1015 }
1016
1017 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1018 {
1019         struct ext2_group_desc *gd;
1020         dgrp_t i;
1021         errcode_t retval;
1022         blk64_t b, c, d;
1023
1024         /* Load bitmaps to ensure that the uninit ones get written out */
1025         fs->super->s_feature_ro_compat |= csum_feature_flag;
1026         retval = ext2fs_read_bitmaps(fs);
1027         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1028         if (retval) {
1029                 com_err("disable_uninit_bg", retval,
1030                         "while reading bitmaps");
1031                 request_fsck_afterwards(fs);
1032                 return retval;
1033         }
1034         ext2fs_mark_ib_dirty(fs);
1035         ext2fs_mark_bb_dirty(fs);
1036
1037         /* If we're only turning off uninit_bg, zero the inodes */
1038         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1039                 retval = zero_empty_inodes(fs);
1040                 if (retval) {
1041                         com_err("disable_uninit_bg", retval,
1042                                 "while zeroing unused inodes");
1043                         request_fsck_afterwards(fs);
1044                         return retval;
1045                 }
1046         }
1047
1048         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1049         for (i = 0; i < fs->group_desc_count; i++) {
1050                 b = ext2fs_block_bitmap_loc(fs, i);
1051                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1052                 b = ext2fs_inode_bitmap_loc(fs, i);
1053                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1054
1055                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1056                 if (retval == 0 && b)
1057                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1058                 if (retval == 0 && c)
1059                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1060                 if (retval == 0 && d)
1061                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1062                 if (retval) {
1063                         com_err("disable_uninit_bg", retval,
1064                                 "while initializing block bitmaps");
1065                         request_fsck_afterwards(fs);
1066                 }
1067
1068                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1069                 gd->bg_itable_unused = 0;
1070                 gd->bg_flags = 0;
1071                 ext2fs_group_desc_csum_set(fs, i);
1072         }
1073         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1074         ext2fs_mark_super_dirty(fs);
1075
1076         return 0;
1077 }
1078
1079 static void
1080 try_confirm_csum_seed_support(void)
1081 {
1082         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1083                 fputs(_("WARNING: Could not confirm kernel support for "
1084                         "metadata_csum_seed.\n  This requires Linux >= "
1085                         "v4.4.\n"), stderr);
1086 }
1087
1088 /*
1089  * Update the feature set as provided by the user.
1090  */
1091 static int update_feature_set(ext2_filsys fs, char *features)
1092 {
1093         struct ext2_super_block *sb = fs->super;
1094         __u32           old_features[3];
1095         int             type_err;
1096         unsigned int    mask_err;
1097         errcode_t       err;
1098         enum quota_type qtype;
1099
1100 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1101                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1102 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1103                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1104 #define FEATURE_CHANGED(type, mask) ((mask) & \
1105                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1106
1107         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1108         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1109         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1110
1111         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1112                               ok_features, clear_ok_features,
1113                               &type_err, &mask_err)) {
1114                 if (!mask_err)
1115                         fprintf(stderr,
1116                                 _("Invalid filesystem option set: %s\n"),
1117                                 features);
1118                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1119                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1120                                           "not supported.\n"),
1121                                 e2p_feature2string(type_err &
1122                                                    E2P_FEATURE_TYPE_MASK,
1123                                                    mask_err));
1124                 else
1125                         fprintf(stderr, _("Setting filesystem feature '%s' "
1126                                           "not supported.\n"),
1127                                 e2p_feature2string(type_err, mask_err));
1128                 return 1;
1129         }
1130
1131         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1132                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1133                     !(mount_flags & EXT2_MF_READONLY)) {
1134                         fputs(_("The has_journal feature may only be "
1135                                 "cleared when the filesystem is\n"
1136                                 "unmounted or mounted "
1137                                 "read-only.\n"), stderr);
1138                         return 1;
1139                 }
1140                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1141                     f_flag < 2) {
1142                         fputs(_("The needs_recovery flag is set.  "
1143                                 "Please run e2fsck before clearing\n"
1144                                 "the has_journal flag.\n"), stderr);
1145                         return 1;
1146                 }
1147                 if (sb->s_journal_inum) {
1148                         if (remove_journal_inode(fs))
1149                                 return 1;
1150                 }
1151                 if (sb->s_journal_dev) {
1152                         if (remove_journal_device(fs))
1153                                 return 1;
1154                 }
1155         }
1156
1157         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1158                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1159                 if (ext2fs_has_feature_meta_bg(sb)) {
1160                         fputs(_("Setting filesystem feature 'sparse_super' "
1161                                 "not supported\nfor filesystems with "
1162                                 "the meta_bg feature enabled.\n"),
1163                                 stderr);
1164                         return 1;
1165                 }
1166         }
1167
1168         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1169                 int error;
1170
1171                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1172                     (mount_flags & EXT2_MF_READONLY)) {
1173                         fputs(_("The multiple mount protection feature can't\n"
1174                                 "be set if the filesystem is mounted or\n"
1175                                 "read-only.\n"), stderr);
1176                         return 1;
1177                 }
1178
1179                 error = ext2fs_mmp_init(fs);
1180                 if (error) {
1181                         fputs(_("\nError while enabling multiple mount "
1182                                 "protection feature."), stderr);
1183                         return 1;
1184                 }
1185
1186                 /*
1187                  * We want to update group desc with the new free blocks count
1188                  */
1189                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1190
1191                 printf(_("Multiple mount protection has been enabled "
1192                          "with update interval %ds.\n"),
1193                        sb->s_mmp_update_interval);
1194         }
1195
1196         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1197                 int error;
1198
1199                 if (mount_flags & EXT2_MF_READONLY) {
1200                         fputs(_("The multiple mount protection feature cannot\n"
1201                                 "be disabled if the filesystem is readonly.\n"),
1202                                 stderr);
1203                         return 1;
1204                 }
1205
1206                 error = ext2fs_read_bitmaps(fs);
1207                 if (error) {
1208                         fputs(_("Error while reading bitmaps\n"), stderr);
1209                         return 1;
1210                 }
1211
1212                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1213                 if (error) {
1214                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1215
1216                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1217                                 printf(_("Magic number in MMP block does not "
1218                                          "match. expected: %x, actual: %x\n"),
1219                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1220                         else
1221                                 com_err(program_name, error, "%s",
1222                                         _("while reading MMP block."));
1223                         goto mmp_error;
1224                 }
1225
1226                 /* We need to force out the group descriptors as well */
1227                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1228                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1229 mmp_error:
1230                 sb->s_mmp_block = 0;
1231                 sb->s_mmp_update_interval = 0;
1232         }
1233
1234         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1235                 /*
1236                  * If adding a journal flag, let the create journal
1237                  * code below handle setting the flag and creating the
1238                  * journal.  We supply a default size if necessary.
1239                  */
1240                 if (!journal_size)
1241                         journal_size = -1;
1242                 ext2fs_clear_feature_journal(sb);
1243         }
1244
1245         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1246                 if (!sb->s_def_hash_version)
1247                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1248                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1249                         uuid_generate((unsigned char *) sb->s_hash_seed);
1250         }
1251
1252         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1253                 if (ext2fs_check_desc(fs)) {
1254                         fputs(_("Clearing the flex_bg flag would "
1255                                 "cause the the filesystem to be\n"
1256                                 "inconsistent.\n"), stderr);
1257                         return 1;
1258                 }
1259         }
1260
1261         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1262                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1263                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1264                     !(mount_flags & EXT2_MF_READONLY)) {
1265                         fputs(_("The huge_file feature may only be "
1266                                 "cleared when the filesystem is\n"
1267                                 "unmounted or mounted "
1268                                 "read-only.\n"), stderr);
1269                         return 1;
1270                 }
1271         }
1272
1273         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1274                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1275                 check_fsck_needed(fs,
1276                         _("Enabling checksums could take some time."));
1277                 if (mount_flags & EXT2_MF_MOUNTED) {
1278                         fputs(_("Cannot enable metadata_csum on a mounted "
1279                                 "filesystem!\n"), stderr);
1280                         exit(1);
1281                 }
1282                 if (!ext2fs_has_feature_extents(fs->super))
1283                         printf("%s",
1284                                _("Extents are not enabled.  The file extent "
1285                                  "tree can be checksummed, whereas block maps "
1286                                  "cannot.  Not enabling extents reduces the "
1287                                  "coverage of metadata checksumming.  "
1288                                  "Re-run with -O extent to rectify.\n"));
1289                 if (!ext2fs_has_feature_64bit(fs->super))
1290                         printf("%s",
1291                                _("64-bit filesystem support is not enabled.  "
1292                                  "The larger fields afforded by this feature "
1293                                  "enable full-strength checksumming.  "
1294                                  "Run resize2fs -b to rectify.\n"));
1295                 rewrite_checksums = 1;
1296                 /* metadata_csum supersedes uninit_bg */
1297                 ext2fs_clear_feature_gdt_csum(fs->super);
1298
1299                 /* if uninit_bg was previously off, rewrite group desc */
1300                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1301                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1302                         enable_uninit_bg(fs);
1303
1304                 /*
1305                  * Since metadata_csum supersedes uninit_bg, pretend like
1306                  * uninit_bg has been off all along.
1307                  */
1308                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1309                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1310         }
1311
1312         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1313                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1314                 __u32   test_features[3];
1315
1316                 check_fsck_needed(fs,
1317                         _("Disabling checksums could take some time."));
1318                 if (mount_flags & EXT2_MF_MOUNTED) {
1319                         fputs(_("Cannot disable metadata_csum on a mounted "
1320                                 "filesystem!\n"), stderr);
1321                         exit(1);
1322                 }
1323                 rewrite_checksums = 1;
1324
1325                 /* Enable uninit_bg unless the user expressly turned it off */
1326                 memcpy(test_features, old_features, sizeof(test_features));
1327                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1328                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1329                 e2p_edit_feature2(features, test_features, ok_features,
1330                                   clear_ok_features, NULL, NULL);
1331                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1332                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1333                         ext2fs_set_feature_gdt_csum(fs->super);
1334
1335                 /*
1336                  * If we're turning off metadata_csum and not turning on
1337                  * uninit_bg, rewrite group desc.
1338                  */
1339                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1340                         err = disable_uninit_bg(fs,
1341                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1342                         if (err)
1343                                 return 1;
1344                 } else
1345                         /*
1346                          * metadata_csum previously provided uninit_bg, so if
1347                          * we're also setting the uninit_bg feature bit,
1348                          * pretend like it was previously enabled.  Checksums
1349                          * will be rewritten with crc16 later.
1350                          */
1351                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1352                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1353                 fs->super->s_checksum_seed = 0;
1354                 ext2fs_clear_feature_csum_seed(fs->super);
1355         }
1356
1357         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1358                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1359                 /* Do not enable uninit_bg when metadata_csum enabled */
1360                 if (ext2fs_has_feature_metadata_csum(fs->super))
1361                         ext2fs_clear_feature_gdt_csum(fs->super);
1362                 else
1363                         enable_uninit_bg(fs);
1364         }
1365
1366         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1367                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1368                 err = disable_uninit_bg(fs,
1369                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1370                 if (err)
1371                         return 1;
1372         }
1373
1374         /*
1375          * We don't actually toggle 64bit; resize2fs does that.  But this
1376          * must come after the metadata_csum feature_on so that it won't
1377          * complain about the lack of 64bit.
1378          */
1379         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1380                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1381                 if (mount_flags & EXT2_MF_MOUNTED) {
1382                         fprintf(stderr, _("Cannot enable 64-bit mode "
1383                                           "while mounted!\n"));
1384                         exit(1);
1385                 }
1386                 ext2fs_clear_feature_64bit(sb);
1387                 feature_64bit = 1;
1388         }
1389         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1390                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1391                 if (mount_flags & EXT2_MF_MOUNTED) {
1392                         fprintf(stderr, _("Cannot disable 64-bit mode "
1393                                           "while mounted!\n"));
1394                         exit(1);
1395                 }
1396                 ext2fs_set_feature_64bit(sb);
1397                 feature_64bit = -1;
1398         }
1399
1400         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1401                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1402                 /*
1403                  * Set the Q_flag here and handle the quota options in the code
1404                  * below.
1405                  */
1406                 if (!Q_flag) {
1407                         Q_flag = 1;
1408                         /* Enable usr/grp quota by default */
1409                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1410                                 if (qtype != PRJQUOTA)
1411                                         quota_enable[qtype] = QOPT_ENABLE;
1412                                 else
1413                                         quota_enable[qtype] = QOPT_DISABLE;
1414                         }
1415                 }
1416                 ext2fs_clear_feature_quota(sb);
1417         }
1418
1419         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1420                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1421                 Q_flag = 1;
1422                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1423         }
1424
1425         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1426                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1427                 Q_flag = 1;
1428                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1429         }
1430
1431         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1432                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1433                 /*
1434                  * Set the Q_flag here and handle the quota options in the code
1435                  * below.
1436                  */
1437                 if (Q_flag)
1438                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1439                                 "arguments.\n"), stderr);
1440                 Q_flag = 1;
1441                 /* Disable all quota by default */
1442                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1443                         quota_enable[qtype] = QOPT_DISABLE;
1444         }
1445
1446         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1447                 fs->super->s_encrypt_algos[0] =
1448                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1449                 fs->super->s_encrypt_algos[1] =
1450                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1451         }
1452
1453         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1454                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1455                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1456                         fputs(_("Setting feature 'metadata_csum_seed' "
1457                                 "is only supported\non filesystems with "
1458                                 "the metadata_csum feature enabled.\n"),
1459                                 stderr);
1460                         return 1;
1461                 }
1462                 try_confirm_csum_seed_support();
1463                 fs->super->s_checksum_seed = fs->csum_seed;
1464         }
1465
1466         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1467                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1468                 __le32 uuid_seed;
1469
1470                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1471                                         sizeof(fs->super->s_uuid));
1472                 if (fs->super->s_checksum_seed != uuid_seed &&
1473                     (mount_flags & EXT2_MF_MOUNTED)) {
1474                         fputs(_("UUID has changed since enabling "
1475                                 "metadata_csum.  Filesystem must be unmounted "
1476                                 "\nto safely rewrite all metadata to "
1477                                 "match the new UUID.\n"), stderr);
1478                         return 1;
1479                 }
1480
1481                 rewrite_checksums = 1;
1482         }
1483
1484         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1485             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1486              sb->s_feature_incompat))
1487                 ext2fs_update_dynamic_rev(fs);
1488
1489         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1490                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1491             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1492                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1493             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1494                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1495             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1496                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1497             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1498                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1499                 request_fsck_afterwards(fs);
1500
1501         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1502             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1503             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1504                 ext2fs_mark_super_dirty(fs);
1505
1506         return 0;
1507 }
1508
1509 /*
1510  * Add a journal to the filesystem.
1511  */
1512 static int add_journal(ext2_filsys fs)
1513 {
1514         unsigned long journal_blocks;
1515         errcode_t       retval;
1516         ext2_filsys     jfs;
1517         io_manager      io_ptr;
1518
1519         if (ext2fs_has_feature_journal(fs->super)) {
1520                 fputs(_("The filesystem already has a journal.\n"), stderr);
1521                 goto err;
1522         }
1523         if (journal_device) {
1524                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1525                                         NULL))
1526                         proceed_question(-1);
1527                 check_mount(journal_device, 0, _("journal"));
1528 #ifdef CONFIG_TESTIO_DEBUG
1529                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1530                         io_ptr = test_io_manager;
1531                         test_io_backing_manager = unix_io_manager;
1532                 } else
1533 #endif
1534                         io_ptr = unix_io_manager;
1535                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1536                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1537                                      fs->blocksize, io_ptr, &jfs);
1538                 if (retval) {
1539                         com_err(program_name, retval,
1540                                 _("\n\twhile trying to open journal on %s\n"),
1541                                 journal_device);
1542                         goto err;
1543                 }
1544                 printf(_("Creating journal on device %s: "),
1545                        journal_device);
1546                 fflush(stdout);
1547
1548                 retval = ext2fs_add_journal_device(fs, jfs);
1549                 ext2fs_close_free(&jfs);
1550                 if (retval) {
1551                         com_err(program_name, retval,
1552                                 _("while adding filesystem to journal on %s"),
1553                                 journal_device);
1554                         goto err;
1555                 }
1556                 fputs(_("done\n"), stdout);
1557         } else if (journal_size) {
1558                 fputs(_("Creating journal inode: "), stdout);
1559                 fflush(stdout);
1560                 journal_blocks = figure_journal_size(journal_size, fs);
1561
1562                 if (journal_location_string)
1563                         journal_location =
1564                                 parse_num_blocks2(journal_location_string,
1565                                                   fs->super->s_log_block_size);
1566                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1567                                                    journal_location,
1568                                                    journal_flags);
1569                 if (retval) {
1570                         fprintf(stderr, "\n");
1571                         com_err(program_name, retval, "%s",
1572                                 _("\n\twhile trying to create journal file"));
1573                         return retval;
1574                 } else
1575                         fputs(_("done\n"), stdout);
1576                 /*
1577                  * If the filesystem wasn't mounted, we need to force
1578                  * the block group descriptors out.
1579                  */
1580                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1581                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1582         }
1583         print_check_message(fs->super->s_max_mnt_count,
1584                             fs->super->s_checkinterval);
1585         return 0;
1586
1587 err:
1588         free(journal_device);
1589         return 1;
1590 }
1591
1592 static void handle_quota_options(ext2_filsys fs)
1593 {
1594         errcode_t retval;
1595         quota_ctx_t qctx;
1596         ext2_ino_t qf_ino;
1597         enum quota_type qtype;
1598         unsigned int qtype_bits = 0;
1599         int need_dirty = 0;
1600
1601         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1602                 if (quota_enable[qtype] != 0)
1603                         break;
1604         if (qtype == MAXQUOTAS)
1605                 /* Nothing to do. */
1606                 return;
1607
1608         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1609                 if (quota_enable[qtype] == QOPT_ENABLE)
1610                         qtype_bits |= 1 << qtype;
1611         }
1612
1613         retval = quota_init_context(&qctx, fs, qtype_bits);
1614         if (retval) {
1615                 com_err(program_name, retval,
1616                         _("while initializing quota context in support library"));
1617                 exit(1);
1618         }
1619
1620         if (qtype_bits)
1621                 quota_compute_usage(qctx);
1622
1623         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1624                 if (quota_enable[qtype] == QOPT_ENABLE &&
1625                     *quota_sb_inump(fs->super, qtype) == 0) {
1626                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1627                                 retval = quota_update_limits(qctx, qf_ino,
1628                                                              qtype);
1629                                 if (retval) {
1630                                         com_err(program_name, retval,
1631                                                 _("while updating quota limits (%d)"),
1632                                                 qtype);
1633                                         exit(1);
1634                                 }
1635                         }
1636                         retval = quota_write_inode(qctx, 1 << qtype);
1637                         if (retval) {
1638                                 com_err(program_name, retval,
1639                                         _("while writing quota file (%d)"),
1640                                         qtype);
1641                                 exit(1);
1642                         }
1643                         /* Enable Quota feature if one of quota enabled */
1644                         if (!ext2fs_has_feature_quota(fs->super)) {
1645                                 ext2fs_set_feature_quota(fs->super);
1646                                 need_dirty = 1;
1647                         }
1648                         if (qtype == PRJQUOTA &&
1649                             !ext2fs_has_feature_project(fs->super)) {
1650                                 ext2fs_set_feature_project(fs->super);
1651                                 need_dirty = 1;
1652                         }
1653                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1654                         retval = quota_remove_inode(fs, qtype);
1655                         if (retval) {
1656                                 com_err(program_name, retval,
1657                                         _("while removing quota file (%d)"),
1658                                         qtype);
1659                                 exit(1);
1660                         }
1661                         if (qtype == PRJQUOTA) {
1662                                 ext2fs_clear_feature_project(fs->super);
1663                                 need_dirty = 1;
1664                         }
1665                 }
1666         }
1667
1668         quota_release_context(&qctx);
1669         /* Clear Quota feature if all quota types disabled. */
1670         if (!qtype_bits) {
1671                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1672                         if (*quota_sb_inump(fs->super, qtype))
1673                                 break;
1674                 if (qtype == MAXQUOTAS) {
1675                         ext2fs_clear_feature_quota(fs->super);
1676                         need_dirty = 1;
1677                 }
1678
1679         }
1680         if (need_dirty)
1681                 ext2fs_mark_super_dirty(fs);
1682         return;
1683 }
1684
1685 static int option_handle_function(char *token)
1686 {
1687         if (strncmp(token, "usr", 3) == 0) {
1688                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1689         } else if (strncmp(token, "^usr", 4) == 0) {
1690                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1691         } else if (strncmp(token, "grp", 3) == 0) {
1692                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1693         } else if (strncmp(token, "^grp", 4) == 0) {
1694                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1695         } else if (strncmp(token, "prj", 3) == 0) {
1696                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1697         } else if (strncmp(token, "^prj", 4) == 0) {
1698                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1699         } else {
1700                 fputs(_("\nBad quota options specified.\n\n"
1701                         "Following valid quota options are available "
1702                         "(pass by separating with comma):\n"
1703                         "\t[^]usr[quota]\n"
1704                         "\t[^]grp[quota]\n"
1705                         "\t[^]prj[quota]\n"
1706                         "\n\n"), stderr);
1707                 return 1;
1708         }
1709         return 0;
1710 }
1711
1712 static void parse_e2label_options(int argc, char ** argv)
1713 {
1714         if ((argc < 2) || (argc > 3)) {
1715                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1716                 exit(1);
1717         }
1718         io_options = strchr(argv[1], '?');
1719         if (io_options)
1720                 *io_options++ = 0;
1721         device_name = blkid_get_devname(NULL, argv[1], NULL);
1722         if (!device_name) {
1723                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1724                         argv[1]);
1725                 exit(1);
1726         }
1727         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1728         if (argc == 3) {
1729                 open_flag |= EXT2_FLAG_RW;
1730                 L_flag = 1;
1731                 new_label = argv[2];
1732         } else
1733                 print_label++;
1734 }
1735
1736 static time_t parse_time(char *str)
1737 {
1738         struct  tm      ts;
1739
1740         if (strcmp(str, "now") == 0) {
1741                 return (time(0));
1742         }
1743         memset(&ts, 0, sizeof(ts));
1744 #ifdef HAVE_STRPTIME
1745         strptime(str, "%Y%m%d%H%M%S", &ts);
1746 #else
1747         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1748                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1749         ts.tm_year -= 1900;
1750         ts.tm_mon -= 1;
1751         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1752             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1753             ts.tm_min > 59 || ts.tm_sec > 61)
1754                 ts.tm_mday = 0;
1755 #endif
1756         if (ts.tm_mday == 0) {
1757                 com_err(program_name, 0,
1758                         _("Couldn't parse date/time specifier: %s"),
1759                         str);
1760                 usage();
1761         }
1762         ts.tm_isdst = -1;
1763         return (mktime(&ts));
1764 }
1765
1766 static void parse_tune2fs_options(int argc, char **argv)
1767 {
1768         int c;
1769         char *tmp;
1770         struct group *gr;
1771         struct passwd *pw;
1772         int ret;
1773         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1774
1775         open_flag = 0;
1776         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1777         while ((c = getopt(argc, argv, optstring)) != EOF)
1778                 switch (c) {
1779                 case 'c':
1780                         max_mount_count = strtol(optarg, &tmp, 0);
1781                         if (*tmp || max_mount_count > 16000) {
1782                                 com_err(program_name, 0,
1783                                         _("bad mounts count - %s"),
1784                                         optarg);
1785                                 usage();
1786                         }
1787                         if (max_mount_count == 0)
1788                                 max_mount_count = -1;
1789                         c_flag = 1;
1790                         open_flag = EXT2_FLAG_RW;
1791                         break;
1792                 case 'C':
1793                         mount_count = strtoul(optarg, &tmp, 0);
1794                         if (*tmp || mount_count > 16000) {
1795                                 com_err(program_name, 0,
1796                                         _("bad mounts count - %s"),
1797                                         optarg);
1798                                 usage();
1799                         }
1800                         C_flag = 1;
1801                         open_flag = EXT2_FLAG_RW;
1802                         break;
1803                 case 'e':
1804                         if (strcmp(optarg, "continue") == 0)
1805                                 errors = EXT2_ERRORS_CONTINUE;
1806                         else if (strcmp(optarg, "remount-ro") == 0)
1807                                 errors = EXT2_ERRORS_RO;
1808                         else if (strcmp(optarg, "panic") == 0)
1809                                 errors = EXT2_ERRORS_PANIC;
1810                         else {
1811                                 com_err(program_name, 0,
1812                                         _("bad error behavior - %s"),
1813                                         optarg);
1814                                 usage();
1815                         }
1816                         e_flag = 1;
1817                         open_flag = EXT2_FLAG_RW;
1818                         break;
1819                 case 'E':
1820                         extended_cmd = optarg;
1821                         open_flag |= EXT2_FLAG_RW;
1822                         break;
1823                 case 'f': /* Force */
1824                         f_flag++;
1825                         break;
1826                 case 'g':
1827                         resgid = strtoul(optarg, &tmp, 0);
1828                         if (*tmp) {
1829                                 gr = getgrnam(optarg);
1830                                 if (gr == NULL)
1831                                         tmp = optarg;
1832                                 else {
1833                                         resgid = gr->gr_gid;
1834                                         *tmp = 0;
1835                                 }
1836                         }
1837                         if (*tmp) {
1838                                 com_err(program_name, 0,
1839                                         _("bad gid/group name - %s"),
1840                                         optarg);
1841                                 usage();
1842                         }
1843                         g_flag = 1;
1844                         open_flag = EXT2_FLAG_RW;
1845                         break;
1846                 case 'i':
1847                         interval = strtoul(optarg, &tmp, 0);
1848                         switch (*tmp) {
1849                         case 's':
1850                                 tmp++;
1851                                 break;
1852                         case '\0':
1853                         case 'd':
1854                         case 'D': /* days */
1855                                 interval *= 86400;
1856                                 if (*tmp != '\0')
1857                                         tmp++;
1858                                 break;
1859                         case 'm':
1860                         case 'M': /* months! */
1861                                 interval *= 86400 * 30;
1862                                 tmp++;
1863                                 break;
1864                         case 'w':
1865                         case 'W': /* weeks */
1866                                 interval *= 86400 * 7;
1867                                 tmp++;
1868                                 break;
1869                         }
1870                         if (*tmp) {
1871                                 com_err(program_name, 0,
1872                                         _("bad interval - %s"), optarg);
1873                                 usage();
1874                         }
1875                         i_flag = 1;
1876                         open_flag = EXT2_FLAG_RW;
1877                         break;
1878                 case 'j':
1879                         if (!journal_size)
1880                                 journal_size = -1;
1881                         open_flag = EXT2_FLAG_RW;
1882                         break;
1883                 case 'J':
1884                         parse_journal_opts(optarg);
1885                         open_flag = EXT2_FLAG_RW;
1886                         break;
1887                 case 'l':
1888                         l_flag = 1;
1889                         break;
1890                 case 'L':
1891                         new_label = optarg;
1892                         L_flag = 1;
1893                         open_flag |= EXT2_FLAG_RW |
1894                                 EXT2_FLAG_JOURNAL_DEV_OK;
1895                         break;
1896                 case 'm':
1897                         reserved_ratio = strtod(optarg, &tmp);
1898                         if (*tmp || reserved_ratio > 50 ||
1899                             reserved_ratio < 0) {
1900                                 com_err(program_name, 0,
1901                                         _("bad reserved block ratio - %s"),
1902                                         optarg);
1903                                 usage();
1904                         }
1905                         m_flag = 1;
1906                         open_flag = EXT2_FLAG_RW;
1907                         break;
1908                 case 'M':
1909                         new_last_mounted = optarg;
1910                         M_flag = 1;
1911                         open_flag = EXT2_FLAG_RW;
1912                         break;
1913                 case 'o':
1914                         if (mntopts_cmd) {
1915                                 com_err(program_name, 0, "%s",
1916                                         _("-o may only be specified once"));
1917                                 usage();
1918                         }
1919                         mntopts_cmd = optarg;
1920                         open_flag = EXT2_FLAG_RW;
1921                         break;
1922                 case 'O':
1923                         if (features_cmd) {
1924                                 com_err(program_name, 0, "%s",
1925                                         _("-O may only be specified once"));
1926                                 usage();
1927                         }
1928                         features_cmd = optarg;
1929                         open_flag = EXT2_FLAG_RW;
1930                         break;
1931                 case 'Q':
1932                         Q_flag = 1;
1933                         ret = parse_quota_opts(optarg, option_handle_function);
1934                         if (ret)
1935                                 exit(1);
1936                         open_flag = EXT2_FLAG_RW;
1937                         break;
1938                 case 'r':
1939                         reserved_blocks = strtoul(optarg, &tmp, 0);
1940                         if (*tmp) {
1941                                 com_err(program_name, 0,
1942                                         _("bad reserved blocks count - %s"),
1943                                         optarg);
1944                                 usage();
1945                         }
1946                         r_flag = 1;
1947                         open_flag = EXT2_FLAG_RW;
1948                         break;
1949                 case 's': /* Deprecated */
1950                         s_flag = atoi(optarg);
1951                         open_flag = EXT2_FLAG_RW;
1952                         break;
1953                 case 'T':
1954                         T_flag = 1;
1955                         last_check_time = parse_time(optarg);
1956                         open_flag = EXT2_FLAG_RW;
1957                         break;
1958                 case 'u':
1959                                 resuid = strtoul(optarg, &tmp, 0);
1960                                 if (*tmp) {
1961                                         pw = getpwnam(optarg);
1962                                         if (pw == NULL)
1963                                                 tmp = optarg;
1964                                         else {
1965                                                 resuid = pw->pw_uid;
1966                                                 *tmp = 0;
1967                                         }
1968                                 }
1969                                 if (*tmp) {
1970                                         com_err(program_name, 0,
1971                                                 _("bad uid/user name - %s"),
1972                                                 optarg);
1973                                         usage();
1974                                 }
1975                                 u_flag = 1;
1976                                 open_flag = EXT2_FLAG_RW;
1977                                 break;
1978                 case 'U':
1979                         new_UUID = optarg;
1980                         U_flag = 1;
1981                         open_flag = EXT2_FLAG_RW |
1982                                 EXT2_FLAG_JOURNAL_DEV_OK;
1983                         break;
1984                 case 'I':
1985                         new_inode_size = strtoul(optarg, &tmp, 0);
1986                         if (*tmp) {
1987                                 com_err(program_name, 0,
1988                                         _("bad inode size - %s"),
1989                                         optarg);
1990                                 usage();
1991                         }
1992                         if (!((new_inode_size &
1993                                (new_inode_size - 1)) == 0)) {
1994                                 com_err(program_name, 0,
1995                                         _("Inode size must be a "
1996                                           "power of two- %s"),
1997                                         optarg);
1998                                 usage();
1999                         }
2000                         open_flag = EXT2_FLAG_RW;
2001                         I_flag = 1;
2002                         break;
2003                 case 'z':
2004                         undo_file = optarg;
2005                         break;
2006                 default:
2007                         usage();
2008                 }
2009         if (optind < argc - 1 || optind == argc)
2010                 usage();
2011         if (!open_flag && !l_flag)
2012                 usage();
2013         io_options = strchr(argv[optind], '?');
2014         if (io_options)
2015                 *io_options++ = 0;
2016         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2017         if (!device_name) {
2018                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2019                         argv[optind]);
2020                 exit(1);
2021         }
2022 }
2023
2024 #ifdef CONFIG_BUILD_FINDFS
2025 void do_findfs(int argc, char **argv)
2026 {
2027         char    *dev;
2028
2029         if ((argc != 2) ||
2030             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2031                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2032                 exit(2);
2033         }
2034         dev = blkid_get_devname(NULL, argv[1], NULL);
2035         if (!dev) {
2036                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2037                         argv[1]);
2038                 exit(1);
2039         }
2040         puts(dev);
2041         exit(0);
2042 }
2043 #endif
2044
2045 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2046 {
2047         char    *buf, *token, *next, *p, *arg;
2048         int     len, hash_alg;
2049         int     r_usage = 0;
2050
2051         len = strlen(opts);
2052         buf = malloc(len+1);
2053         if (!buf) {
2054                 fprintf(stderr, "%s",
2055                         _("Couldn't allocate memory to parse options!\n"));
2056                 return 1;
2057         }
2058         strcpy(buf, opts);
2059         for (token = buf; token && *token; token = next) {
2060                 p = strchr(token, ',');
2061                 next = 0;
2062                 if (p) {
2063                         *p = 0;
2064                         next = p+1;
2065                 }
2066                 arg = strchr(token, '=');
2067                 if (arg) {
2068                         *arg = 0;
2069                         arg++;
2070                 }
2071                 if (strcmp(token, "clear-mmp") == 0 ||
2072                     strcmp(token, "clear_mmp") == 0) {
2073                         clear_mmp = 1;
2074                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2075                         unsigned long intv;
2076                         if (!arg) {
2077                                 r_usage++;
2078                                 continue;
2079                         }
2080                         intv = strtoul(arg, &p, 0);
2081                         if (*p) {
2082                                 fprintf(stderr,
2083                                         _("Invalid mmp_update_interval: %s\n"),
2084                                         arg);
2085                                 r_usage++;
2086                                 continue;
2087                         }
2088                         if (intv == 0) {
2089                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2090                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2091                                 fprintf(stderr,
2092                                         _("mmp_update_interval too big: %lu\n"),
2093                                         intv);
2094                                 r_usage++;
2095                                 continue;
2096                         }
2097                         printf(P_("Setting multiple mount protection update "
2098                                   "interval to %lu second\n",
2099                                   "Setting multiple mount protection update "
2100                                   "interval to %lu seconds\n", intv),
2101                                intv);
2102                         fs->super->s_mmp_update_interval = intv;
2103                         ext2fs_mark_super_dirty(fs);
2104                 } else if (!strcmp(token, "test_fs")) {
2105                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2106                         printf("Setting test filesystem flag\n");
2107                         ext2fs_mark_super_dirty(fs);
2108                 } else if (!strcmp(token, "^test_fs")) {
2109                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2110                         printf("Clearing test filesystem flag\n");
2111                         ext2fs_mark_super_dirty(fs);
2112                 } else if (strcmp(token, "stride") == 0) {
2113                         if (!arg) {
2114                                 r_usage++;
2115                                 continue;
2116                         }
2117                         stride = strtoul(arg, &p, 0);
2118                         if (*p) {
2119                                 fprintf(stderr,
2120                                         _("Invalid RAID stride: %s\n"),
2121                                         arg);
2122                                 r_usage++;
2123                                 continue;
2124                         }
2125                         stride_set = 1;
2126                 } else if (strcmp(token, "stripe-width") == 0 ||
2127                            strcmp(token, "stripe_width") == 0) {
2128                         if (!arg) {
2129                                 r_usage++;
2130                                 continue;
2131                         }
2132                         stripe_width = strtoul(arg, &p, 0);
2133                         if (*p) {
2134                                 fprintf(stderr,
2135                                         _("Invalid RAID stripe-width: %s\n"),
2136                                         arg);
2137                                 r_usage++;
2138                                 continue;
2139                         }
2140                         stripe_width_set = 1;
2141                 } else if (strcmp(token, "hash_alg") == 0 ||
2142                            strcmp(token, "hash-alg") == 0) {
2143                         if (!arg) {
2144                                 r_usage++;
2145                                 continue;
2146                         }
2147                         hash_alg = e2p_string2hash(arg);
2148                         if (hash_alg < 0) {
2149                                 fprintf(stderr,
2150                                         _("Invalid hash algorithm: %s\n"),
2151                                         arg);
2152                                 r_usage++;
2153                                 continue;
2154                         }
2155                         fs->super->s_def_hash_version = hash_alg;
2156                         printf(_("Setting default hash algorithm "
2157                                  "to %s (%d)\n"),
2158                                arg, hash_alg);
2159                         ext2fs_mark_super_dirty(fs);
2160                 } else if (!strcmp(token, "mount_opts")) {
2161                         if (!arg) {
2162                                 r_usage++;
2163                                 continue;
2164                         }
2165                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2166                                 fprintf(stderr,
2167                                         "Extended mount options too long\n");
2168                                 continue;
2169                         }
2170                         ext_mount_opts = strdup(arg);
2171                 } else
2172                         r_usage++;
2173         }
2174         if (r_usage) {
2175                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2176                         "Extended options are separated by commas, "
2177                         "and may take an argument which\n"
2178                         "\tis set off by an equals ('=') sign.\n\n"
2179                         "Valid extended options are:\n"
2180                         "\tclear_mmp\n"
2181                         "\thash_alg=<hash algorithm>\n"
2182                         "\tmount_opts=<extended default mount options>\n"
2183                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2184                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2185                         "\ttest_fs\n"
2186                         "\t^test_fs\n"));
2187                 free(buf);
2188                 return 1;
2189         }
2190         free(buf);
2191
2192         return 0;
2193 }
2194
2195 /*
2196  * Fill in the block bitmap bmap with the information regarding the
2197  * blocks to be moved
2198  */
2199 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2200                             ext2fs_block_bitmap bmap)
2201 {
2202         dgrp_t i;
2203         int retval;
2204         ext2_badblocks_list bb_list = 0;
2205         blk64_t j, needed_blocks = 0;
2206         blk64_t start_blk, end_blk;
2207
2208         retval = ext2fs_read_bb_inode(fs, &bb_list);
2209         if (retval)
2210                 return retval;
2211
2212         for (i = 0; i < fs->group_desc_count; i++) {
2213                 start_blk = ext2fs_inode_table_loc(fs, i) +
2214                                         fs->inode_blocks_per_group;
2215
2216                 end_blk = ext2fs_inode_table_loc(fs, i) +
2217                                         new_ino_blks_per_grp;
2218
2219                 for (j = start_blk; j < end_blk; j++) {
2220                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2221                                 /*
2222                                  * IF the block is a bad block we fail
2223                                  */
2224                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2225                                         ext2fs_badblocks_list_free(bb_list);
2226                                         return ENOSPC;
2227                                 }
2228
2229                                 ext2fs_mark_block_bitmap2(bmap, j);
2230                         } else {
2231                                 /*
2232                                  * We are going to use this block for
2233                                  * inode table. So mark them used.
2234                                  */
2235                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2236                         }
2237                 }
2238                 needed_blocks += end_blk - start_blk;
2239         }
2240
2241         ext2fs_badblocks_list_free(bb_list);
2242         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2243                 return ENOSPC;
2244
2245         return 0;
2246 }
2247
2248 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2249 {
2250         dgrp_t group;
2251         group = ext2fs_group_of_blk2(fs, blk);
2252         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2253                 return 1;
2254         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2255                 return 1;
2256         return 0;
2257 }
2258
2259 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2260 {
2261         blk64_t start_blk, end_blk;
2262         start_blk = fs->super->s_first_data_block +
2263                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2264         /*
2265          * We cannot get new block beyond end_blk for for the last block group
2266          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2267          */
2268         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2269         if (blk >= start_blk && blk <= end_blk)
2270                 return 1;
2271         return 0;
2272 }
2273
2274 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2275 {
2276
2277         char *buf;
2278         dgrp_t group = 0;
2279         errcode_t retval;
2280         int meta_data = 0;
2281         blk64_t blk, new_blk, goal;
2282         struct blk_move *bmv;
2283
2284         retval = ext2fs_get_mem(fs->blocksize, &buf);
2285         if (retval)
2286                 return retval;
2287
2288         for (new_blk = blk = fs->super->s_first_data_block;
2289              blk < ext2fs_blocks_count(fs->super); blk++) {
2290                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2291                         continue;
2292
2293                 if (ext2fs_is_meta_block(fs, blk)) {
2294                         /*
2295                          * If the block is mapping a fs meta data block
2296                          * like group desc/block bitmap/inode bitmap. We
2297                          * should find a block in the same group and fix
2298                          * the respective fs metadata pointers. Otherwise
2299                          * fail
2300                          */
2301                         group = ext2fs_group_of_blk2(fs, blk);
2302                         goal = ext2fs_group_first_block2(fs, group);
2303                         meta_data = 1;
2304
2305                 } else {
2306                         goal = new_blk;
2307                 }
2308                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2309                 if (retval)
2310                         goto err_out;
2311
2312                 /* new fs meta data block should be in the same group */
2313                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2314                         retval = ENOSPC;
2315                         goto err_out;
2316                 }
2317
2318                 /* Mark this block as allocated */
2319                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2320
2321                 /* Add it to block move list */
2322                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2323                 if (retval)
2324                         goto err_out;
2325
2326                 bmv->old_loc = blk;
2327                 bmv->new_loc = new_blk;
2328
2329                 list_add(&(bmv->list), &blk_move_list);
2330
2331                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2332                 if (retval)
2333                         goto err_out;
2334
2335                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2336                 if (retval)
2337                         goto err_out;
2338         }
2339
2340 err_out:
2341         ext2fs_free_mem(&buf);
2342         return retval;
2343 }
2344
2345 static blk64_t translate_block(blk64_t blk)
2346 {
2347         struct list_head *entry;
2348         struct blk_move *bmv;
2349
2350         list_for_each(entry, &blk_move_list) {
2351                 bmv = list_entry(entry, struct blk_move, list);
2352                 if (bmv->old_loc == blk)
2353                         return bmv->new_loc;
2354         }
2355
2356         return 0;
2357 }
2358
2359 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2360                          blk64_t *block_nr,
2361                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2362                          blk64_t ref_block EXT2FS_ATTR((unused)),
2363                          int ref_offset EXT2FS_ATTR((unused)),
2364                          void *priv_data)
2365 {
2366         int ret = 0;
2367         blk64_t new_blk;
2368         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2369
2370         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2371                 return 0;
2372         new_blk = translate_block(*block_nr);
2373         if (new_blk) {
2374                 *block_nr = new_blk;
2375                 /*
2376                  * This will force the ext2fs_write_inode in the iterator
2377                  */
2378                 ret |= BLOCK_CHANGED;
2379         }
2380
2381         return ret;
2382 }
2383
2384 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2385 {
2386         errcode_t retval = 0;
2387         ext2_ino_t ino;
2388         blk64_t blk;
2389         char *block_buf = 0;
2390         struct ext2_inode inode;
2391         ext2_inode_scan scan = NULL;
2392
2393         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2394         if (retval)
2395                 return retval;
2396
2397         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2398         if (retval)
2399                 goto err_out;
2400
2401         while (1) {
2402                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2403                 if (retval)
2404                         goto err_out;
2405
2406                 if (!ino)
2407                         break;
2408
2409                 if (inode.i_links_count == 0)
2410                         continue; /* inode not in use */
2411
2412                 /* FIXME!!
2413                  * If we end up modifying the journal inode
2414                  * the sb->s_jnl_blocks will differ. But a
2415                  * subsequent e2fsck fixes that.
2416                  * Do we need to fix this ??
2417                  */
2418
2419                 if (ext2fs_file_acl_block(fs, &inode) &&
2420                     ext2fs_test_block_bitmap2(bmap,
2421                                         ext2fs_file_acl_block(fs, &inode))) {
2422                         blk = translate_block(ext2fs_file_acl_block(fs,
2423                                                                     &inode));
2424                         if (!blk)
2425                                 continue;
2426
2427                         ext2fs_file_acl_block_set(fs, &inode, blk);
2428
2429                         /*
2430                          * Write the inode to disk so that inode table
2431                          * resizing can work
2432                          */
2433                         retval = ext2fs_write_inode(fs, ino, &inode);
2434                         if (retval)
2435                                 goto err_out;
2436                 }
2437
2438                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2439                         continue;
2440
2441                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2442                                                process_block, bmap);
2443                 if (retval)
2444                         goto err_out;
2445
2446         }
2447
2448 err_out:
2449         ext2fs_free_mem(&block_buf);
2450         ext2fs_close_inode_scan(scan);
2451
2452         return retval;
2453 }
2454
2455 /*
2456  * We need to scan for inode and block bitmaps that may need to be
2457  * moved.  This can take place if the filesystem was formatted for
2458  * RAID arrays using the mke2fs's extended option "stride".
2459  */
2460 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2461 {
2462         dgrp_t i;
2463         blk64_t blk, new_blk;
2464
2465         for (i = 0; i < fs->group_desc_count; i++) {
2466                 blk = ext2fs_block_bitmap_loc(fs, i);
2467                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2468                         new_blk = translate_block(blk);
2469                         if (!new_blk)
2470                                 continue;
2471                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2472                 }
2473
2474                 blk = ext2fs_inode_bitmap_loc(fs, i);
2475                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2476                         new_blk = translate_block(blk);
2477                         if (!new_blk)
2478                                 continue;
2479                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2480                 }
2481         }
2482         return 0;
2483 }
2484
2485 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2486 {
2487         dgrp_t i;
2488         blk64_t blk;
2489         errcode_t retval;
2490         int new_ino_blks_per_grp;
2491         unsigned int j;
2492         char *old_itable = NULL, *new_itable = NULL;
2493         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2494         unsigned long old_ino_size;
2495         int old_itable_size, new_itable_size;
2496
2497         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2498         old_ino_size = EXT2_INODE_SIZE(fs->super);
2499
2500         new_ino_blks_per_grp = ext2fs_div_ceil(
2501                                         EXT2_INODES_PER_GROUP(fs->super) *
2502                                         new_ino_size,
2503                                         fs->blocksize);
2504
2505         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2506
2507         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2508         if (retval)
2509                 return retval;
2510
2511         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2512         if (retval)
2513                 goto err_out;
2514
2515         tmp_old_itable = old_itable;
2516         tmp_new_itable = new_itable;
2517
2518         for (i = 0; i < fs->group_desc_count; i++) {
2519                 blk = ext2fs_inode_table_loc(fs, i);
2520                 retval = io_channel_read_blk64(fs->io, blk,
2521                                 fs->inode_blocks_per_group, old_itable);
2522                 if (retval)
2523                         goto err_out;
2524
2525                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2526                         memcpy(new_itable, old_itable, old_ino_size);
2527
2528                         memset(new_itable+old_ino_size, 0,
2529                                         new_ino_size - old_ino_size);
2530
2531                         new_itable += new_ino_size;
2532                         old_itable += old_ino_size;
2533                 }
2534
2535                 /* reset the pointer */
2536                 old_itable = tmp_old_itable;
2537                 new_itable = tmp_new_itable;
2538
2539                 retval = io_channel_write_blk64(fs->io, blk,
2540                                         new_ino_blks_per_grp, new_itable);
2541                 if (retval)
2542                         goto err_out;
2543         }
2544
2545         /* Update the meta data */
2546         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2547         ext2fs_free_inode_cache(fs->icache);
2548         fs->icache = 0;
2549         fs->super->s_inode_size = new_ino_size;
2550
2551 err_out:
2552         if (old_itable)
2553                 ext2fs_free_mem(&old_itable);
2554
2555         if (new_itable)
2556                 ext2fs_free_mem(&new_itable);
2557
2558         return retval;
2559 }
2560
2561 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2562 {
2563         blk64_t         blk;
2564         ext2_ino_t      ino;
2565         unsigned int    group = 0;
2566         unsigned int    count = 0;
2567         int             total_free = 0;
2568         int             group_free = 0;
2569
2570         /*
2571          * First calculate the block statistics
2572          */
2573         for (blk = fs->super->s_first_data_block;
2574              blk < ext2fs_blocks_count(fs->super); blk++) {
2575                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2576                         group_free++;
2577                         total_free++;
2578                 }
2579                 count++;
2580                 if ((count == fs->super->s_blocks_per_group) ||
2581                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2582                         ext2fs_bg_free_blocks_count_set(fs, group++,
2583                                                         group_free);
2584                         count = 0;
2585                         group_free = 0;
2586                 }
2587         }
2588         total_free = EXT2FS_C2B(fs, total_free);
2589         ext2fs_free_blocks_count_set(fs->super, total_free);
2590
2591         /*
2592          * Next, calculate the inode statistics
2593          */
2594         group_free = 0;
2595         total_free = 0;
2596         count = 0;
2597         group = 0;
2598
2599         /* Protect loop from wrap-around if s_inodes_count maxed */
2600         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2601                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2602                         group_free++;
2603                         total_free++;
2604                 }
2605                 count++;
2606                 if ((count == fs->super->s_inodes_per_group) ||
2607                     (ino == fs->super->s_inodes_count)) {
2608                         ext2fs_bg_free_inodes_count_set(fs, group++,
2609                                                         group_free);
2610                         count = 0;
2611                         group_free = 0;
2612                 }
2613         }
2614         fs->super->s_free_inodes_count = total_free;
2615         ext2fs_mark_super_dirty(fs);
2616         return 0;
2617 }
2618
2619 #define list_for_each_safe(pos, pnext, head) \
2620         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2621              pos = pnext, pnext = pos->next)
2622
2623 static void free_blk_move_list(void)
2624 {
2625         struct list_head *entry, *tmp;
2626         struct blk_move *bmv;
2627
2628         list_for_each_safe(entry, tmp, &blk_move_list) {
2629                 bmv = list_entry(entry, struct blk_move, list);
2630                 list_del(entry);
2631                 ext2fs_free_mem(&bmv);
2632         }
2633         return;
2634 }
2635
2636 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2637 {
2638         errcode_t retval;
2639         int new_ino_blks_per_grp;
2640         ext2fs_block_bitmap bmap;
2641
2642         retval = ext2fs_read_inode_bitmap(fs);
2643         if (retval) {
2644                 fputs(_("Failed to read inode bitmap\n"), stderr);
2645                 return retval;
2646         }
2647         retval = ext2fs_read_block_bitmap(fs);
2648         if (retval) {
2649                 fputs(_("Failed to read block bitmap\n"), stderr);
2650                 return retval;
2651         }
2652         INIT_LIST_HEAD(&blk_move_list);
2653
2654
2655         new_ino_blks_per_grp = ext2fs_div_ceil(
2656                                         EXT2_INODES_PER_GROUP(fs->super)*
2657                                         new_size,
2658                                         fs->blocksize);
2659
2660         /* We may change the file system.
2661          * Mark the file system as invalid so that
2662          * the user is prompted to run fsck.
2663          */
2664         fs->super->s_state &= ~EXT2_VALID_FS;
2665
2666         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2667                                                 &bmap);
2668         if (retval) {
2669                 fputs(_("Failed to allocate block bitmap when "
2670                                 "increasing inode size\n"), stderr);
2671                 return retval;
2672         }
2673         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2674         if (retval) {
2675                 fputs(_("Not enough space to increase inode size \n"), stderr);
2676                 goto err_out;
2677         }
2678         retval = move_block(fs, bmap);
2679         if (retval) {
2680                 fputs(_("Failed to relocate blocks during inode resize \n"),
2681                       stderr);
2682                 goto err_out;
2683         }
2684         retval = inode_scan_and_fix(fs, bmap);
2685         if (retval)
2686                 goto err_out_undo;
2687
2688         retval = group_desc_scan_and_fix(fs, bmap);
2689         if (retval)
2690                 goto err_out_undo;
2691
2692         retval = expand_inode_table(fs, new_size);
2693         if (retval)
2694                 goto err_out_undo;
2695
2696         ext2fs_calculate_summary_stats(fs);
2697
2698         fs->super->s_state |= EXT2_VALID_FS;
2699         /* mark super block and block bitmap as dirty */
2700         ext2fs_mark_super_dirty(fs);
2701         ext2fs_mark_bb_dirty(fs);
2702
2703 err_out:
2704         free_blk_move_list();
2705         ext2fs_free_block_bitmap(bmap);
2706
2707         return retval;
2708
2709 err_out_undo:
2710         free_blk_move_list();
2711         ext2fs_free_block_bitmap(bmap);
2712         fputs(_("Error in resizing the inode size.\n"
2713                         "Run e2undo to undo the "
2714                         "file system changes. \n"), stderr);
2715
2716         return retval;
2717 }
2718
2719 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2720 {
2721         errcode_t retval = 0;
2722         const char *tdb_dir;
2723         char *tdb_file = NULL;
2724         char *dev_name, *tmp_name;
2725
2726         /* (re)open a specific undo file */
2727         if (undo_file && undo_file[0] != 0) {
2728                 retval = set_undo_io_backing_manager(*io_ptr);
2729                 if (retval)
2730                         goto err;
2731                 *io_ptr = undo_io_manager;
2732                 retval = set_undo_io_backup_file(undo_file);
2733                 if (retval)
2734                         goto err;
2735                 printf(_("Overwriting existing filesystem; this can be undone "
2736                          "using the command:\n"
2737                          "    e2undo %s %s\n\n"),
2738                          undo_file, name);
2739                 return retval;
2740         }
2741
2742         /*
2743          * Configuration via a conf file would be
2744          * nice
2745          */
2746         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2747         if (!tdb_dir)
2748                 tdb_dir = "/var/lib/e2fsprogs";
2749
2750         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2751             access(tdb_dir, W_OK))
2752                 return 0;
2753
2754         tmp_name = strdup(name);
2755         if (!tmp_name)
2756                 goto errout;
2757         dev_name = basename(tmp_name);
2758         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2759         if (!tdb_file) {
2760                 free(tmp_name);
2761                 goto errout;
2762         }
2763         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2764         free(tmp_name);
2765
2766         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2767                 retval = errno;
2768                 com_err(program_name, retval,
2769                         _("while trying to delete %s"), tdb_file);
2770                 goto errout;
2771         }
2772
2773         retval = set_undo_io_backing_manager(*io_ptr);
2774         if (retval)
2775                 goto errout;
2776         *io_ptr = undo_io_manager;
2777         retval = set_undo_io_backup_file(tdb_file);
2778         if (retval)
2779                 goto errout;
2780         printf(_("Overwriting existing filesystem; this can be undone "
2781                  "using the command:\n"
2782                  "    e2undo %s %s\n\n"),
2783                  tdb_file, name);
2784
2785         free(tdb_file);
2786         return 0;
2787 errout:
2788         free(tdb_file);
2789 err:
2790         com_err("tune2fs", retval, "while trying to setup undo file\n");
2791         return retval;
2792 }
2793
2794 static int
2795 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2796 {
2797         int retval, nr_users, start;
2798         journal_superblock_t *jsb;
2799         ext2_filsys jfs;
2800         __u8 *j_uuid;
2801         char *journal_path;
2802         char uuid[UUID_STR_SIZE];
2803         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2804
2805         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2806                 return 0;
2807
2808         uuid_unparse(sb->s_journal_uuid, uuid);
2809         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2810         if (!journal_path)
2811                 return 0;
2812
2813         retval = ext2fs_open2(journal_path, io_options,
2814                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2815                               0, 0, unix_io_manager, &jfs);
2816         if (retval) {
2817                 com_err(program_name, retval,
2818                         _("while trying to open %s"),
2819                         journal_path);
2820                 return retval;
2821         }
2822
2823         retval = get_journal_sb(jfs, buf);
2824         if (retval != 0) {
2825                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2826                         fprintf(stderr, _("%s is not a journal device.\n"),
2827                                 journal_path);
2828                 return retval;
2829         }
2830
2831         jsb = (journal_superblock_t *) buf;
2832         /* Find the filesystem UUID */
2833         nr_users = ntohl(jsb->s_nr_users);
2834
2835         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2836         if (j_uuid == NULL) {
2837                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2838                       stderr);
2839                 return EXT2_ET_LOAD_EXT_JOURNAL;
2840         }
2841
2842         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2843
2844         start = ext2fs_journal_sb_start(jfs->blocksize);
2845         /* Write back the journal superblock */
2846         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2847         if (retval != 0) {
2848                 com_err(program_name, retval,
2849                         "while writing journal superblock.");
2850                 return retval;
2851         }
2852
2853         ext2fs_close(jfs);
2854
2855         return 0;
2856 }
2857
2858 #ifndef BUILD_AS_LIB
2859 int main(int argc, char **argv)
2860 #else
2861 int tune2fs_main(int argc, char **argv)
2862 #endif  /* BUILD_AS_LIB */
2863 {
2864         errcode_t retval;
2865         ext2_filsys fs;
2866         struct ext2_super_block *sb;
2867         io_manager io_ptr, io_ptr_orig = NULL;
2868         int rc = 0;
2869         char default_undo_file[1] = { 0 };
2870
2871 #ifdef ENABLE_NLS
2872         setlocale(LC_MESSAGES, "");
2873         setlocale(LC_CTYPE, "");
2874         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2875         textdomain(NLS_CAT_NAME);
2876         set_com_err_gettext(gettext);
2877 #endif
2878         if (argc && *argv)
2879                 program_name = *argv;
2880         add_error_table(&et_ext2_error_table);
2881
2882 #ifdef CONFIG_BUILD_FINDFS
2883         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2884                 do_findfs(argc, argv);
2885 #endif
2886         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2887                 parse_e2label_options(argc, argv);
2888         else
2889                 parse_tune2fs_options(argc, argv);
2890
2891 #ifdef CONFIG_TESTIO_DEBUG
2892         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2893                 io_ptr = test_io_manager;
2894                 test_io_backing_manager = unix_io_manager;
2895         } else
2896 #endif
2897                 io_ptr = unix_io_manager;
2898
2899 retry_open:
2900         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2901                 open_flag |= EXT2_FLAG_SKIP_MMP;
2902
2903         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2904
2905         /* keep the filesystem struct around to dump MMP data */
2906         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2907
2908         retval = ext2fs_open2(device_name, io_options, open_flag,
2909                               0, 0, io_ptr, &fs);
2910         if (retval) {
2911                 com_err(program_name, retval,
2912                         _("while trying to open %s"),
2913                         device_name);
2914                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2915                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2916                         dump_mmp_msg(fs->mmp_buf,
2917                                      _("If you are sure the filesystem "
2918                                        "is not in use on any node, run:\n"
2919                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2920                 else if (retval == EXT2_ET_MMP_FAILED)
2921                         dump_mmp_msg(fs->mmp_buf, NULL);
2922                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2923                         fprintf(stderr,
2924                                 _("MMP block magic is bad. Try to fix it by "
2925                                   "running:\n'e2fsck -f %s'\n"), device_name);
2926                 else if (retval == EXT2_ET_BAD_MAGIC)
2927                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2928                 else if (retval != EXT2_ET_MMP_FAILED)
2929                         fprintf(stderr, "%s",
2930                              _("Couldn't find valid filesystem superblock.\n"));
2931
2932                 ext2fs_free(fs);
2933                 exit(1);
2934         }
2935         if (ext2fs_has_feature_journal_dev(fs->super)) {
2936                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2937                 ext2fs_free(fs);
2938                 exit(1);
2939         }
2940         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2941
2942         if (I_flag) {
2943                 /*
2944                  * Check the inode size is right so we can issue an
2945                  * error message and bail before setting up the tdb
2946                  * file.
2947                  */
2948                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2949                         fprintf(stderr, _("The inode size is already %lu\n"),
2950                                 new_inode_size);
2951                         rc = 1;
2952                         goto closefs;
2953                 }
2954                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2955                         fprintf(stderr, "%s",
2956                                 _("Shrinking inode size is not supported\n"));
2957                         rc = 1;
2958                         goto closefs;
2959                 }
2960                 if (new_inode_size > fs->blocksize) {
2961                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2962                                 new_inode_size, fs->blocksize);
2963                         rc = 1;
2964                         goto closefs;
2965                 }
2966                 check_fsck_needed(fs,
2967                         _("Resizing inodes could take some time."));
2968                 /*
2969                  * If inode resize is requested use the
2970                  * Undo I/O manager
2971                  */
2972                 undo_file = default_undo_file;
2973         }
2974
2975         /* Set up an undo file */
2976         if (undo_file && io_ptr_orig == NULL) {
2977                 io_ptr_orig = io_ptr;
2978                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2979                 if (retval) {
2980                         rc = 1;
2981                         goto closefs;
2982                 }
2983                 if (io_ptr != io_ptr_orig) {
2984                         ext2fs_close_free(&fs);
2985                         goto retry_open;
2986                 }
2987         }
2988
2989         sb = fs->super;
2990         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2991
2992         if (print_label) {
2993                 /* For e2label emulation */
2994                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2995                        sb->s_volume_name);
2996                 remove_error_table(&et_ext2_error_table);
2997                 goto closefs;
2998         }
2999
3000         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3001         if (retval) {
3002                 com_err("ext2fs_check_if_mount", retval,
3003                         _("while determining whether %s is mounted."),
3004                         device_name);
3005                 rc = 1;
3006                 goto closefs;
3007         }
3008         /* Normally we only need to write out the superblock */
3009         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3010
3011         if (c_flag) {
3012                 sb->s_max_mnt_count = max_mount_count;
3013                 ext2fs_mark_super_dirty(fs);
3014                 printf(_("Setting maximal mount count to %d\n"),
3015                        max_mount_count);
3016         }
3017         if (C_flag) {
3018                 sb->s_mnt_count = mount_count;
3019                 ext2fs_mark_super_dirty(fs);
3020                 printf(_("Setting current mount count to %d\n"), mount_count);
3021         }
3022         if (e_flag) {
3023                 sb->s_errors = errors;
3024                 ext2fs_mark_super_dirty(fs);
3025                 printf(_("Setting error behavior to %d\n"), errors);
3026         }
3027         if (g_flag) {
3028                 sb->s_def_resgid = resgid;
3029                 ext2fs_mark_super_dirty(fs);
3030                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3031         }
3032         if (i_flag) {
3033                 if ((unsigned long long)interval >= (1ULL << 32)) {
3034                         com_err(program_name, 0,
3035                                 _("interval between checks is too big (%lu)"),
3036                                 interval);
3037                         rc = 1;
3038                         goto closefs;
3039                 }
3040                 sb->s_checkinterval = interval;
3041                 ext2fs_mark_super_dirty(fs);
3042                 printf(_("Setting interval between checks to %lu seconds\n"),
3043                        interval);
3044         }
3045         if (m_flag) {
3046                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3047                                           ext2fs_blocks_count(sb) / 100.0);
3048                 ext2fs_mark_super_dirty(fs);
3049                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3050                         reserved_ratio, ext2fs_r_blocks_count(sb));
3051         }
3052         if (r_flag) {
3053                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3054                         com_err(program_name, 0,
3055                                 _("reserved blocks count is too big (%llu)"),
3056                                 reserved_blocks);
3057                         rc = 1;
3058                         goto closefs;
3059                 }
3060                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3061                 ext2fs_mark_super_dirty(fs);
3062                 printf(_("Setting reserved blocks count to %llu\n"),
3063                        reserved_blocks);
3064         }
3065         if (s_flag == 1) {
3066                 if (ext2fs_has_feature_sparse_super(sb)) {
3067                         fputs(_("\nThe filesystem already has sparse "
3068                                 "superblocks.\n"), stderr);
3069                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3070                         fputs(_("\nSetting the sparse superblock flag not "
3071                                 "supported\nfor filesystems with "
3072                                 "the meta_bg feature enabled.\n"),
3073                                 stderr);
3074                         rc = 1;
3075                         goto closefs;
3076                 } else {
3077                         ext2fs_set_feature_sparse_super(sb);
3078                         sb->s_state &= ~EXT2_VALID_FS;
3079                         ext2fs_mark_super_dirty(fs);
3080                         printf(_("\nSparse superblock flag set.  %s"),
3081                                _(please_fsck));
3082                 }
3083         }
3084         if (s_flag == 0) {
3085                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3086                       stderr);
3087                 rc = 1;
3088                 goto closefs;
3089         }
3090         if (T_flag) {
3091                 sb->s_lastcheck = last_check_time;
3092                 ext2fs_mark_super_dirty(fs);
3093                 printf(_("Setting time filesystem last checked to %s\n"),
3094                        ctime(&last_check_time));
3095         }
3096         if (u_flag) {
3097                 sb->s_def_resuid = resuid;
3098                 ext2fs_mark_super_dirty(fs);
3099                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3100         }
3101         if (L_flag) {
3102                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3103                         fputs(_("Warning: label too long, truncating.\n"),
3104                               stderr);
3105                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3106                 strncpy(sb->s_volume_name, new_label,
3107                         sizeof(sb->s_volume_name));
3108                 ext2fs_mark_super_dirty(fs);
3109         }
3110         if (M_flag) {
3111                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3112                 strncpy(sb->s_last_mounted, new_last_mounted,
3113                         sizeof(sb->s_last_mounted));
3114                 ext2fs_mark_super_dirty(fs);
3115         }
3116         if (mntopts_cmd) {
3117                 rc = update_mntopts(fs, mntopts_cmd);
3118                 if (rc)
3119                         goto closefs;
3120         }
3121         if (features_cmd) {
3122                 rc = update_feature_set(fs, features_cmd);
3123                 if (rc)
3124                         goto closefs;
3125         }
3126         if (extended_cmd) {
3127                 rc = parse_extended_opts(fs, extended_cmd);
3128                 if (rc)
3129                         goto closefs;
3130                 if (clear_mmp && !f_flag) {
3131                         fputs(_("Error in using clear_mmp. "
3132                                 "It must be used with -f\n"),
3133                               stderr);
3134                         goto closefs;
3135                 }
3136         }
3137         if (clear_mmp) {
3138                 rc = ext2fs_mmp_clear(fs);
3139                 goto closefs;
3140         }
3141         if (journal_size || journal_device) {
3142                 rc = add_journal(fs);
3143                 if (rc)
3144                         goto closefs;
3145         }
3146
3147         if (Q_flag) {
3148                 if (mount_flags & EXT2_MF_MOUNTED) {
3149                         fputs(_("The quota feature may only be changed when "
3150                                 "the filesystem is unmounted.\n"), stderr);
3151                         rc = 1;
3152                         goto closefs;
3153                 }
3154                 handle_quota_options(fs);
3155         }
3156
3157         if (U_flag) {
3158                 int set_csum = 0;
3159                 dgrp_t i;
3160                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3161                 __u8 old_uuid[UUID_SIZE];
3162
3163                 if (ext2fs_has_group_desc_csum(fs)) {
3164                         /*
3165                          * Changing the UUID on a metadata_csum FS requires
3166                          * rewriting all metadata, which can race with a
3167                          * mounted fs.  Don't allow that unless we're saving
3168                          * the checksum seed.
3169                          */
3170                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3171                             !ext2fs_has_feature_csum_seed(fs->super) &&
3172                             ext2fs_has_feature_metadata_csum(fs->super)) {
3173                                 fputs(_("The UUID may only be "
3174                                         "changed when the filesystem is "
3175                                         "unmounted.\n"), stderr);
3176                                 fputs(_("If you only use kernels newer than "
3177                                         "v4.4, run 'tune2fs -O "
3178                                         "metadata_csum_seed' and re-run this "
3179                                         "command.\n"), stderr);
3180                                 try_confirm_csum_seed_support();
3181                                 exit(1);
3182                         }
3183                         if (!ext2fs_has_feature_csum_seed(fs->super))
3184                                 check_fsck_needed(fs,
3185                                         _("Setting UUID on a checksummed "
3186                                           "filesystem could take some time."));
3187
3188                         /*
3189                          * Determine if the block group checksums are
3190                          * correct so we know whether or not to set
3191                          * them later on.
3192                          */
3193                         for (i = 0; i < fs->group_desc_count; i++)
3194                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3195                                         break;
3196                         if (i >= fs->group_desc_count)
3197                                 set_csum = 1;
3198                 }
3199
3200                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3201                 if ((strcasecmp(new_UUID, "null") == 0) ||
3202                     (strcasecmp(new_UUID, "clear") == 0)) {
3203                         uuid_clear(sb->s_uuid);
3204                 } else if (strcasecmp(new_UUID, "time") == 0) {
3205                         uuid_generate_time(sb->s_uuid);
3206                 } else if (strcasecmp(new_UUID, "random") == 0) {
3207                         uuid_generate(sb->s_uuid);
3208                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3209                         com_err(program_name, 0, "%s",
3210                                 _("Invalid UUID format\n"));
3211                         rc = 1;
3212                         goto closefs;
3213                 }
3214                 ext2fs_init_csum_seed(fs);
3215                 if (set_csum) {
3216                         for (i = 0; i < fs->group_desc_count; i++)
3217                                 ext2fs_group_desc_csum_set(fs, i);
3218                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3219                 }
3220
3221                 /* If this is a journal dev, we need to copy UUID into jsb */
3222                 if (!(rc = get_journal_sb(fs, buf))) {
3223                         journal_superblock_t *jsb;
3224
3225                         jsb = (journal_superblock_t *) buf;
3226                         fputs(_("Need to update journal superblock.\n"), stdout);
3227                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3228
3229                         /* Writeback the journal superblock */
3230                         if ((rc = io_channel_write_blk64(fs->io,
3231                                 ext2fs_journal_sb_start(fs->blocksize),
3232                                         -SUPERBLOCK_SIZE, buf)))
3233                                 goto closefs;
3234                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3235                         goto closefs;
3236                 else {
3237                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3238
3239                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3240                                 goto closefs;
3241                 }
3242
3243                 ext2fs_mark_super_dirty(fs);
3244                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3245                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3246                      ext2fs_has_feature_ea_inode(fs->super)))
3247                         rewrite_checksums = 1;
3248         }
3249
3250         if (I_flag) {
3251                 if (mount_flags & EXT2_MF_MOUNTED) {
3252                         fputs(_("The inode size may only be "
3253                                 "changed when the filesystem is "
3254                                 "unmounted.\n"), stderr);
3255                         rc = 1;
3256                         goto closefs;
3257                 }
3258                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3259                         fputs(_("Changing the inode size not supported for "
3260                                 "filesystems with the flex_bg\n"
3261                                 "feature enabled.\n"),
3262                               stderr);
3263                         rc = 1;
3264                         goto closefs;
3265                 }
3266                 /*
3267                  * We want to update group descriptor also
3268                  * with the new free inode count
3269                  */
3270                 if (rewrite_checksums)
3271                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3272                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3273                 retval = resize_inode(fs, new_inode_size);
3274                 if (rewrite_checksums)
3275                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3276                 if (retval == 0) {
3277                         printf(_("Setting inode size %lu\n"),
3278                                                         new_inode_size);
3279                         rewrite_checksums = 1;
3280                 } else {
3281                         printf("%s", _("Failed to change inode size\n"));
3282                         rc = 1;
3283                         goto closefs;
3284                 }
3285         }
3286
3287         if (rewrite_checksums)
3288                 rewrite_metadata_checksums(fs);
3289
3290         if (l_flag)
3291                 list_super(sb);
3292         if (stride_set) {
3293                 sb->s_raid_stride = stride;
3294                 ext2fs_mark_super_dirty(fs);
3295                 printf(_("Setting stride size to %d\n"), stride);
3296         }
3297         if (stripe_width_set) {
3298                 sb->s_raid_stripe_width = stripe_width;
3299                 ext2fs_mark_super_dirty(fs);
3300                 printf(_("Setting stripe width to %d\n"), stripe_width);
3301         }
3302         if (ext_mount_opts) {
3303                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3304                         sizeof(fs->super->s_mount_opts));
3305                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3306                 ext2fs_mark_super_dirty(fs);
3307                 printf(_("Setting extended default mount options to '%s'\n"),
3308                        ext_mount_opts);
3309                 free(ext_mount_opts);
3310         }
3311
3312 #ifdef NO_RECOVERY
3313         /* Warn if file system needs recovery and it is opened for writing. */
3314         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3315             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3316             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3317                 fprintf(stderr,
3318 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3319   "\te2fsck -E journal_only %s\n\n"
3320   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3321   "by journal recovery.\n"), device_name);
3322         }
3323 #else
3324         /* Recover the journal if possible. */
3325         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3326             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3327                 errcode_t err;
3328
3329                 printf(_("Recovering journal.\n"));
3330                 err = ext2fs_run_ext3_journal(&fs);
3331                 if (err) {
3332                         com_err("tune2fs", err, "while recovering journal.\n");
3333                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3334                         goto closefs;
3335                 }
3336                 ext2fs_clear_feature_journal_needs_recovery(fs->super);
3337                 ext2fs_mark_super_dirty(fs);
3338         }
3339 #endif
3340
3341         free(device_name);
3342         remove_error_table(&et_ext2_error_table);
3343
3344 closefs:
3345         if (rc) {
3346                 ext2fs_mmp_stop(fs);
3347 #ifndef BUILD_AS_LIB
3348                 exit(1);
3349 #endif
3350         }
3351
3352         convert_64bit(fs, feature_64bit);
3353         return (ext2fs_close_free(&fs) ? 1 : 0);
3354 }