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 #endif
  48 #include <string.h>
  49 #include <time.h>
  50 #include <unistd.h>
  51 #include <sys/types.h>
  52 #include <libgen.h>
  53 #include <limits.h>
  54
  55 #include "ext2fs/ext2_fs.h"
  56 #include "ext2fs/ext2fs.h"
  57 #include "ext2fs/kernel-jbd.h"
  58 #include "et/com_err.h"
  59 #include "support/plausible.h"
  60 #include "support/quotaio.h"
  61 #include "uuid/uuid.h"
  62 #include "e2p/e2p.h"
  63 #include "util.h"
  64 #include "blkid/blkid.h"
  65
  66 #include "../version.h"
  67 #include "support/nls-enable.h"
  68
  69 #define QOPT_ENABLE     (1)
  70 #define QOPT_DISABLE    (-1)
  71
  72 extern int ask_yn(const char *string, int def);
  73
  74 const char *program_name = "tune2fs";
  75 char *device_name;
  76 char *new_label, *new_last_mounted, *new_UUID;
  77 char *io_options;
  78 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  79 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  80 static int I_flag;
  81 static int clear_mmp;
  82 static time_t last_check_time;
  83 static int print_label;
  84 static int max_mount_count, mount_count, mount_flags;
  85 static unsigned long interval;
  86 static blk64_t reserved_blocks;
  87 static double reserved_ratio;
  88 static unsigned long resgid, resuid;
  89 static unsigned short errors;
  90 static int open_flag;
  91 static char *features_cmd;
  92 static char *mntopts_cmd;
  93 static int stride, stripe_width;
  94 static int stride_set, stripe_width_set;
  95 static char *extended_cmd;
  96 static unsigned long new_inode_size;
  97 static char *ext_mount_opts;
  98 static int quota_enable[MAXQUOTAS];
  99 static int rewrite_checksums;
 100 static int feature_64bit;
 101 static int fsck_requested;
 102 static char *undo_file;
 103
 104 int journal_size, journal_flags;
 105 char *journal_device;
 106 static blk64_t journal_location = ~0LL;
 107
 108 static struct list_head blk_move_list;
 109
 110 struct blk_move {
 111         struct list_head list;
 112         blk64_t old_loc;
 113         blk64_t new_loc;
 114 };
 115
 116
 117 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
 118 static const char *please_dir_fsck =
 119                 N_("Please run e2fsck -D on the filesystem.\n");
 120
 121 #ifdef CONFIG_BUILD_FINDFS
 122 void do_findfs(int argc, char **argv);
 123 #endif
 124
 125 static void usage(void)
 126 {
 127         fprintf(stderr,
 128                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
 129                   "[-g group]\n"
 130                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 131                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 132                   "\t[-p mmp_update_interval] [-r reserved_blocks_count] "
 133                   "[-u user]\n"
 134                   "\t[-C mount_count] [-L volume_label] [-M last_mounted_dir]\n"
 135                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 136                   "\t[-E extended-option[,...]] [-T last_check_time] "
 137                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 138                 program_name);
 139         exit(1);
 140 }
 141
 142 static __u32 ok_features[3] = {
 143         /* Compat */
 144         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 145                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 146         /* Incompat */
 147         EXT2_FEATURE_INCOMPAT_FILETYPE |
 148                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 149                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 150                 EXT4_FEATURE_INCOMPAT_MMP |
 151                 EXT4_FEATURE_INCOMPAT_64BIT |
 152                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 153                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 154         /* R/O compat */
 155         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 156                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 157                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 158                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 159                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 160                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 161                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 162                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 163                 EXT4_FEATURE_RO_COMPAT_READONLY |
 164                 EXT4_FEATURE_RO_COMPAT_PROJECT
 165 };
 166
 167 static __u32 clear_ok_features[3] = {
 168         /* Compat */
 169         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 170                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 171                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 172         /* Incompat */
 173         EXT2_FEATURE_INCOMPAT_FILETYPE |
 174                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 175                 EXT4_FEATURE_INCOMPAT_MMP |
 176                 EXT4_FEATURE_INCOMPAT_64BIT |
 177                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 178         /* R/O compat */
 179         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 180                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 181                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 182                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 183                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 184                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 185                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 186                 EXT4_FEATURE_RO_COMPAT_READONLY
 187 };
 188
 189 /**
 190  * Try to get journal super block if any
 191  */
 192 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 193 {
 194         int retval;
 195         journal_superblock_t *jsb;
 196
 197         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 198                 return EXT2_ET_UNSUPP_FEATURE;
 199         }
 200
 201         /* Get the journal superblock */
 202         if ((retval = io_channel_read_blk64(jfs->io,
 203             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 204                 com_err(program_name, retval, "%s",
 205                 _("while reading journal superblock"));
 206                 return retval;
 207         }
 208
 209         jsb = (journal_superblock_t *) buf;
 210         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 211             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 212                 fputs(_("Journal superblock not found!\n"), stderr);
 213                 return EXT2_ET_BAD_MAGIC;
 214         }
 215
 216         return 0;
 217 }
 218
 219 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 220                           int nr_users)
 221 {
 222         int i;
 223         for (i = 0; i < nr_users; i++) {
 224                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 225                         return &s_users[i * UUID_SIZE];
 226         }
 227
 228         return NULL;
 229 }
 230
 231 /*
 232  * Remove an external journal from the filesystem
 233  */
 234 static int remove_journal_device(ext2_filsys fs)
 235 {
 236         char            *journal_path;
 237         ext2_filsys     jfs;
 238         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 239         journal_superblock_t    *jsb;
 240         int             i, nr_users;
 241         errcode_t       retval;
 242         int             commit_remove_journal = 0;
 243         io_manager      io_ptr;
 244
 245         if (f_flag)
 246                 commit_remove_journal = 1; /* force removal even if error */
 247
 248         uuid_unparse(fs->super->s_journal_uuid, buf);
 249         journal_path = blkid_get_devname(NULL, "UUID", buf);
 250
 251         if (!journal_path) {
 252                 journal_path =
 253                         ext2fs_find_block_device(fs->super->s_journal_dev);
 254                 if (!journal_path)
 255                         goto no_valid_journal;
 256         }
 257
 258 #ifdef CONFIG_TESTIO_DEBUG
 259         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 260                 io_ptr = test_io_manager;
 261                 test_io_backing_manager = unix_io_manager;
 262         } else
 263 #endif
 264                 io_ptr = unix_io_manager;
 265         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 266                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 267                              fs->blocksize, io_ptr, &jfs);
 268         if (retval) {
 269                 com_err(program_name, retval, "%s",
 270                         _("while trying to open external journal"));
 271                 goto no_valid_journal;
 272         }
 273
 274         if ((retval = get_journal_sb(jfs, buf))) {
 275                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 276                         fprintf(stderr, _("%s is not a journal device.\n"),
 277                                 journal_path);
 278                 goto no_valid_journal;
 279         }
 280
 281         jsb = (journal_superblock_t *) buf;
 282         /* Find the filesystem UUID */
 283         nr_users = ntohl(jsb->s_nr_users);
 284
 285         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 286                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 287                       stderr);
 288                 commit_remove_journal = 1;
 289                 goto no_valid_journal;
 290         }
 291         nr_users--;
 292         for (i = 0; i < nr_users; i++)
 293                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 294         jsb->s_nr_users = htonl(nr_users);
 295
 296         /* Write back the journal superblock */
 297         retval = io_channel_write_blk64(jfs->io,
 298                                         ext2fs_journal_sb_start(fs->blocksize),
 299                                         -SUPERBLOCK_SIZE, buf);
 300         if (retval) {
 301                 com_err(program_name, retval,
 302                         "while writing journal superblock.");
 303                 goto no_valid_journal;
 304         }
 305
 306         commit_remove_journal = 1;
 307
 308 no_valid_journal:
 309         if (commit_remove_journal == 0) {
 310                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 311                         "Use -f option to remove missing journal device.\n"),
 312                       stderr);
 313                 return 1;
 314         }
 315         fs->super->s_journal_dev = 0;
 316         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 317         uuid_clear(fs->super->s_journal_uuid);
 318         ext2fs_mark_super_dirty(fs);
 319         fputs(_("Journal removed\n"), stdout);
 320         free(journal_path);
 321
 322         return 0;
 323 }
 324
 325 /* Helper function for remove_journal_inode */
 326 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 327                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 328                                blk64_t ref_block EXT2FS_ATTR((unused)),
 329                                int ref_offset EXT2FS_ATTR((unused)),
 330                                void *private EXT2FS_ATTR((unused)))
 331 {
 332         blk64_t block;
 333         int     group;
 334
 335         block = *blocknr;
 336         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 337         group = ext2fs_group_of_blk2(fs, block);
 338         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 339         ext2fs_group_desc_csum_set(fs, group);
 340         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 341         return 0;
 342 }
 343
 344 /*
 345  * Remove the journal inode from the filesystem
 346  */
 347 static errcode_t remove_journal_inode(ext2_filsys fs)
 348 {
 349         struct ext2_inode       inode;
 350         errcode_t               retval;
 351         ino_t                   ino = fs->super->s_journal_inum;
 352
 353         retval = ext2fs_read_inode(fs, ino,  &inode);
 354         if (retval) {
 355                 com_err(program_name, retval, "%s",
 356                         _("while reading journal inode"));
 357                 return retval;
 358         }
 359         if (ino == EXT2_JOURNAL_INO) {
 360                 retval = ext2fs_read_bitmaps(fs);
 361                 if (retval) {
 362                         com_err(program_name, retval, "%s",
 363                                 _("while reading bitmaps"));
 364                         return retval;
 365                 }
 366                 retval = ext2fs_block_iterate3(fs, ino,
 367                                                BLOCK_FLAG_READ_ONLY, NULL,
 368                                                release_blocks_proc, NULL);
 369                 if (retval) {
 370                         com_err(program_name, retval, "%s",
 371                                 _("while clearing journal inode"));
 372                         return retval;
 373                 }
 374                 memset(&inode, 0, sizeof(inode));
 375                 ext2fs_mark_bb_dirty(fs);
 376                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 377         } else
 378                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 379         retval = ext2fs_write_inode(fs, ino, &inode);
 380         if (retval) {
 381                 com_err(program_name, retval, "%s",
 382                         _("while writing journal inode"));
 383                 return retval;
 384         }
 385         fs->super->s_journal_inum = 0;
 386         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 387         ext2fs_mark_super_dirty(fs);
 388
 389         return 0;
 390 }
 391
 392 /*
 393  * Update the default mount options
 394  */
 395 static int update_mntopts(ext2_filsys fs, char *mntopts)
 396 {
 397         struct ext2_super_block *sb = fs->super;
 398
 399         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 400                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 401                         mntopts);
 402                 return 1;
 403         }
 404         ext2fs_mark_super_dirty(fs);
 405
 406         return 0;
 407 }
 408
 409 static void check_fsck_needed(ext2_filsys fs, const char *prompt)
 410 {
 411         /* Refuse to modify anything but a freshly checked valid filesystem. */
 412         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 413             (fs->super->s_state & EXT2_ERROR_FS) ||
 414             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 415                 printf("\n%s\n", _(please_fsck));
 416                 if (mount_flags & EXT2_MF_READONLY)
 417                         printf("%s", _("(and reboot afterwards!)\n"));
 418                 exit(1);
 419         }
 420
 421         /* Give the admin a few seconds to bail out of a dangerous op. */
 422         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 423                 return;
 424
 425         puts(prompt);
 426         proceed_question(5);
 427 }
 428
 429 static void request_dir_fsck_afterwards(ext2_filsys fs)
 430 {
 431         static int requested;
 432
 433         if (requested++)
 434                 return;
 435         fsck_requested++;
 436         fs->super->s_state &= ~EXT2_VALID_FS;
 437         printf("\n%s\n", _(please_dir_fsck));
 438         if (mount_flags & EXT2_MF_READONLY)
 439                 printf("%s", _("(and reboot afterwards!)\n"));
 440 }
 441
 442 static void request_fsck_afterwards(ext2_filsys fs)
 443 {
 444         static int requested = 0;
 445
 446         if (requested++)
 447                 return;
 448         fsck_requested++;
 449         fs->super->s_state &= ~EXT2_VALID_FS;
 450         printf("\n%s\n", _(please_fsck));
 451         if (mount_flags & EXT2_MF_READONLY)
 452                 printf("%s", _("(and reboot afterwards!)\n"));
 453 }
 454
 455 static void convert_64bit(ext2_filsys fs, int direction)
 456 {
 457         if (!direction)
 458                 return;
 459
 460         /*
 461          * Is resize2fs going to demand a fsck run? Might as well tell the
 462          * user now.
 463          */
 464         if (!fsck_requested &&
 465             ((fs->super->s_state & EXT2_ERROR_FS) ||
 466              !(fs->super->s_state & EXT2_VALID_FS) ||
 467              fs->super->s_lastcheck < fs->super->s_mtime))
 468                 request_fsck_afterwards(fs);
 469         if (fsck_requested)
 470                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 471                         direction > 0 ? "-b" : "-s", fs->device_name);
 472         else
 473                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 474                         direction > 0 ? "-b" : "-s", fs->device_name);
 475
 476         if (undo_file)
 477                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 478         if (direction > 0)
 479                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 480         else
 481                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 482 }
 483
 484 /* Rewrite extents */
 485 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 486                                  struct ext2_inode *inode)
 487 {
 488         ext2_extent_handle_t    handle;
 489         struct ext2fs_extent    extent;
 490         errcode_t               errcode;
 491         struct ext2_extent_info info;
 492
 493         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 494             !ext2fs_has_feature_metadata_csum(fs->super))
 495                 return 0;
 496
 497         errcode = ext2fs_extent_open(fs, ino, &handle);
 498         if (errcode)
 499                 return errcode;
 500
 501         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 502         if (errcode)
 503                 goto out;
 504
 505         do {
 506                 errcode = ext2fs_extent_get_info(handle, &info);
 507                 if (errcode)
 508                         break;
 509
 510                 /*
 511                  * If this is the first extent in an extent block that we
 512                  * haven't visited, rewrite the extent to force the ETB
 513                  * checksum to be rewritten.
 514                  */
 515                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 516                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 517                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 518                         if (errcode)
 519                                 break;
 520                 }
 521
 522                 /* Skip to the end of a block of leaf nodes */
 523                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 524                         errcode = ext2fs_extent_get(handle,
 525                                                     EXT2_EXTENT_LAST_SIB,
 526                                                     &extent);
 527                         if (errcode)
 528                                 break;
 529                 }
 530
 531                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 532         } while (errcode == 0);
 533
 534 out:
 535         /* Ok if we run off the end */
 536         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 537                 errcode = 0;
 538         ext2fs_extent_free(handle);
 539         return errcode;
 540 }
 541
 542 /*
 543  * Rewrite directory blocks with checksums
 544  */
 545 struct rewrite_dir_context {
 546         char *buf;
 547         errcode_t errcode;
 548         ext2_ino_t dir;
 549         int is_htree;
 550 };
 551
 552 static int rewrite_dir_block(ext2_filsys fs,
 553                              blk64_t    *blocknr,
 554                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 555                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 556                              int        ref_offset EXT2FS_ATTR((unused)),
 557                              void       *priv_data)
 558 {
 559         struct ext2_dx_countlimit *dcl = NULL;
 560         struct rewrite_dir_context *ctx = priv_data;
 561         int dcl_offset, changed = 0;
 562
 563         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 564                                               ctx->dir);
 565         if (ctx->errcode)
 566                 return BLOCK_ABORT;
 567
 568         /* if htree node... */
 569         if (ctx->is_htree)
 570                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 571                                          &dcl, &dcl_offset);
 572         if (dcl) {
 573                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 574                         /* Ensure limit is the max size */
 575                         int max_entries = (fs->blocksize - dcl_offset) /
 576                                           sizeof(struct ext2_dx_entry);
 577                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 578                                 changed = 1;
 579                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 580                         }
 581                 } else {
 582                         /* If htree block is full then rebuild the dir */
 583                         if (ext2fs_le16_to_cpu(dcl->count) ==
 584                             ext2fs_le16_to_cpu(dcl->limit)) {
 585                                 request_dir_fsck_afterwards(fs);
 586                                 return 0;
 587                         }
 588                         /*
 589                          * Ensure dcl->limit is small enough to leave room for
 590                          * the checksum tail.
 591                          */
 592                         int max_entries = (fs->blocksize - (dcl_offset +
 593                                                 sizeof(struct ext2_dx_tail))) /
 594                                           sizeof(struct ext2_dx_entry);
 595                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 596                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 597                         /* Always rewrite checksum */
 598                         changed = 1;
 599                 }
 600         } else {
 601                 unsigned int rec_len, name_size;
 602                 char *top = ctx->buf + fs->blocksize;
 603                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 604                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 605
 606                 /* Find last and penultimate dirent */
 607                 while ((char *)de < top) {
 608                         penultimate_de = last_de;
 609                         last_de = de;
 610                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 611                         if (!ctx->errcode && !rec_len)
 612                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 613                         if (ctx->errcode)
 614                                 return BLOCK_ABORT;
 615                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 616                 }
 617                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 618                 if (ctx->errcode)
 619                         return BLOCK_ABORT;
 620                 name_size = ext2fs_dirent_name_len(last_de);
 621
 622                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 623                         if (!penultimate_de)
 624                                 return 0;
 625                         if (last_de->inode ||
 626                             name_size ||
 627                             rec_len != sizeof(struct ext2_dir_entry_tail))
 628                                 return 0;
 629                         /*
 630                          * The last dirent is unused and the right length to
 631                          * have stored a checksum.  Erase it.
 632                          */
 633                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 634                                                           &rec_len);
 635                         if (!rec_len)
 636                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 637                         if (ctx->errcode)
 638                                 return BLOCK_ABORT;
 639                         ext2fs_set_rec_len(fs, rec_len +
 640                                         sizeof(struct ext2_dir_entry_tail),
 641                                         penultimate_de);
 642                         changed = 1;
 643                 } else {
 644                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 645                         struct ext2_dir_entry_tail *t;
 646
 647                         /*
 648                          * If the last dirent looks like the tail, just update
 649                          * the checksum.
 650                          */
 651                         if (!last_de->inode &&
 652                             rec_len == csum_size) {
 653                                 t = (struct ext2_dir_entry_tail *)last_de;
 654                                 t->det_reserved_name_len =
 655                                                 EXT2_DIR_NAME_LEN_CSUM;
 656                                 changed = 1;
 657                                 goto out;
 658                         }
 659                         if (name_size & 3)
 660                                 name_size = (name_size & ~3) + 4;
 661                         /* If there's not enough space for the tail, e2fsck */
 662                         if (rec_len <= (8 + name_size + csum_size)) {
 663                                 request_dir_fsck_afterwards(fs);
 664                                 return 0;
 665                         }
 666                         /* Shorten that last de and insert the tail */
 667                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 668                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 669                         ext2fs_initialize_dirent_tail(fs, t);
 670
 671                         /* Always update checksum */
 672                         changed = 1;
 673                 }
 674         }
 675
 676 out:
 677         if (!changed)
 678                 return 0;
 679
 680         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 681                                                0, ctx->dir);
 682         if (ctx->errcode)
 683                 return BLOCK_ABORT;
 684
 685         return 0;
 686 }
 687
 688 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 689                                    struct ext2_inode *inode)
 690 {
 691         errcode_t       retval;
 692         struct rewrite_dir_context ctx;
 693
 694         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 695         if (retval)
 696                 return retval;
 697
 698         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 699         ctx.dir = dir;
 700         ctx.errcode = 0;
 701         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 702                                                 BLOCK_FLAG_DATA_ONLY,
 703                                        0, rewrite_dir_block, &ctx);
 704
 705         ext2fs_free_mem(&ctx.buf);
 706         if (retval)
 707                 return retval;
 708
 709         return ctx.errcode;
 710 }
 711
 712 /*
 713  * Forcibly set checksums in all inodes.
 714  */
 715 static void rewrite_inodes(ext2_filsys fs)
 716 {
 717         int length = EXT2_INODE_SIZE(fs->super);
 718         struct ext2_inode *inode, *zero;
 719         char            *ea_buf;
 720         ext2_inode_scan scan;
 721         errcode_t       retval;
 722         ext2_ino_t      ino;
 723         blk64_t         file_acl_block;
 724         int             inode_dirty;
 725
 726         if (fs->super->s_creator_os != EXT2_OS_LINUX)
 727                 return;
 728
 729         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 730         if (retval) {
 731                 com_err("set_csum", retval, "while opening inode scan");
 732                 exit(1);
 733         }
 734
 735         retval = ext2fs_get_mem(length, &inode);
 736         if (retval) {
 737                 com_err("set_csum", retval, "while allocating memory");
 738                 exit(1);
 739         }
 740
 741         retval = ext2fs_get_memzero(length, &zero);
 742         if (retval) {
 743                 com_err("set_csum", retval, "while allocating memory");
 744                 exit(1);
 745         }
 746
 747         retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
 748         if (retval) {
 749                 com_err("set_csum", retval, "while allocating memory");
 750                 exit(1);
 751         }
 752
 753         do {
 754                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 755                 if (retval) {
 756                         com_err("set_csum", retval, "while getting next inode");
 757                         exit(1);
 758                 }
 759                 if (!ino)
 760                         break;
 761                 if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 762                         inode_dirty = 1;
 763                 } else {
 764                         if (memcmp(inode, zero, length) != 0) {
 765                                 memset(inode, 0, length);
 766                                 inode_dirty = 1;
 767                         } else {
 768                                 inode_dirty = 0;
 769                         }
 770                 }
 771
 772                 if (inode_dirty) {
 773                         retval = ext2fs_write_inode_full(fs, ino, inode,
 774                                                          length);
 775                         if (retval) {
 776                                 com_err("set_csum", retval, "while writing "
 777                                         "inode");
 778                                 exit(1);
 779                         }
 780                 }
 781
 782                 retval = rewrite_extents(fs, ino, inode);
 783                 if (retval) {
 784                         com_err("rewrite_extents", retval,
 785                                 "while rewriting extents");
 786                         exit(1);
 787                 }
 788
 789                 if (LINUX_S_ISDIR(inode->i_mode) &&
 790                     ext2fs_inode_has_valid_blocks2(fs, inode)) {
 791                         retval = rewrite_directory(fs, ino, inode);
 792                         if (retval) {
 793                                 com_err("rewrite_directory", retval,
 794                                         "while rewriting directories");
 795                                 exit(1);
 796                         }
 797                 }
 798
 799                 file_acl_block = ext2fs_file_acl_block(fs, inode);
 800                 if (!file_acl_block)
 801                         continue;
 802                 retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
 803                 if (retval) {
 804                         com_err("rewrite_eablock", retval,
 805                                 "while rewriting extended attribute");
 806                         exit(1);
 807                 }
 808                 retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
 809                                                 ino);
 810                 if (retval) {
 811                         com_err("rewrite_eablock", retval,
 812                                 "while rewriting extended attribute");
 813                         exit(1);
 814                 }
 815         } while (ino);
 816
 817         ext2fs_free_mem(&zero);
 818         ext2fs_free_mem(&inode);
 819         ext2fs_free_mem(&ea_buf);
 820         ext2fs_close_inode_scan(scan);
 821 }
 822
 823 static void rewrite_metadata_checksums(ext2_filsys fs)
 824 {
 825         errcode_t retval;
 826         dgrp_t i;
 827
 828         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 829         ext2fs_init_csum_seed(fs);
 830         for (i = 0; i < fs->group_desc_count; i++)
 831                 ext2fs_group_desc_csum_set(fs, i);
 832         retval = ext2fs_read_bitmaps(fs);
 833         if (retval) {
 834                 com_err("rewrite_metadata_checksums", retval,
 835                         "while reading bitmaps");
 836                 exit(1);
 837         }
 838         rewrite_inodes(fs);
 839         ext2fs_mark_ib_dirty(fs);
 840         ext2fs_mark_bb_dirty(fs);
 841         ext2fs_mmp_update2(fs, 1);
 842         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 843         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 844         if (ext2fs_has_feature_metadata_csum(fs->super))
 845                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 846         else
 847                 fs->super->s_checksum_type = 0;
 848         ext2fs_mark_super_dirty(fs);
 849 }
 850
 851 static void enable_uninit_bg(ext2_filsys fs)
 852 {
 853         struct ext2_group_desc *gd;
 854         dgrp_t i;
 855
 856         for (i = 0; i < fs->group_desc_count; i++) {
 857                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 858                 gd->bg_itable_unused = 0;
 859                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 860                 ext2fs_group_desc_csum_set(fs, i);
 861         }
 862         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 863 }
 864
 865 static errcode_t zero_empty_inodes(ext2_filsys fs)
 866 {
 867         int length = EXT2_INODE_SIZE(fs->super);
 868         struct ext2_inode *inode = NULL;
 869         ext2_inode_scan scan;
 870         errcode_t       retval;
 871         ext2_ino_t      ino;
 872
 873         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 874         if (retval)
 875                 goto out;
 876
 877         retval = ext2fs_get_mem(length, &inode);
 878         if (retval)
 879                 goto out;
 880
 881         do {
 882                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 883                 if (retval)
 884                         goto out;
 885                 if (!ino)
 886                         break;
 887                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 888                         memset(inode, 0, length);
 889                         retval = ext2fs_write_inode_full(fs, ino, inode,
 890                                                          length);
 891                         if (retval)
 892                                 goto out;
 893                 }
 894         } while (1);
 895
 896 out:
 897         ext2fs_free_mem(&inode);
 898         ext2fs_close_inode_scan(scan);
 899         return retval;
 900 }
 901
 902 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 903 {
 904         struct ext2_group_desc *gd;
 905         dgrp_t i;
 906         errcode_t retval;
 907         blk64_t b, c, d;
 908
 909         /* Load bitmaps to ensure that the uninit ones get written out */
 910         fs->super->s_feature_ro_compat |= csum_feature_flag;
 911         retval = ext2fs_read_bitmaps(fs);
 912         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 913         if (retval) {
 914                 com_err("disable_uninit_bg", retval,
 915                         "while reading bitmaps");
 916                 request_fsck_afterwards(fs);
 917                 return retval;
 918         }
 919         ext2fs_mark_ib_dirty(fs);
 920         ext2fs_mark_bb_dirty(fs);
 921
 922         /* If we're only turning off uninit_bg, zero the inodes */
 923         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 924                 retval = zero_empty_inodes(fs);
 925                 if (retval) {
 926                         com_err("disable_uninit_bg", retval,
 927                                 "while zeroing unused inodes");
 928                         request_fsck_afterwards(fs);
 929                         return retval;
 930                 }
 931         }
 932
 933         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
 934         for (i = 0; i < fs->group_desc_count; i++) {
 935                 b = ext2fs_block_bitmap_loc(fs, i);
 936                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 937                 b = ext2fs_inode_bitmap_loc(fs, i);
 938                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 939
 940                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
 941                 if (retval == 0 && b)
 942                         ext2fs_mark_block_bitmap2(fs->block_map, b);
 943                 if (retval == 0 && c)
 944                         ext2fs_mark_block_bitmap2(fs->block_map, c);
 945                 if (retval == 0 && d)
 946                         ext2fs_mark_block_bitmap2(fs->block_map, d);
 947                 if (retval) {
 948                         com_err("disable_uninit_bg", retval,
 949                                 "while initializing block bitmaps");
 950                         request_fsck_afterwards(fs);
 951                 }
 952
 953                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 954                 gd->bg_itable_unused = 0;
 955                 gd->bg_flags = 0;
 956                 ext2fs_group_desc_csum_set(fs, i);
 957         }
 958         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 959         ext2fs_mark_super_dirty(fs);
 960
 961         return 0;
 962 }
 963
 964 static void
 965 try_confirm_csum_seed_support(void)
 966 {
 967         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
 968                 fputs(_("WARNING: Could not confirm kernel support for "
 969                         "metadata_csum_seed.\n  This requires Linux >= "
 970                         "v4.4.\n"), stderr);
 971 }
 972
 973 /*
 974  * Update the feature set as provided by the user.
 975  */
 976 static int update_feature_set(ext2_filsys fs, char *features)
 977 {
 978         struct ext2_super_block *sb = fs->super;
 979         __u32           old_features[3];
 980         int             type_err;
 981         unsigned int    mask_err;
 982         errcode_t       err;
 983         enum quota_type qtype;
 984
 985 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
 986                                 ((&sb->s_feature_compat)[(type)] & (mask)))
 987 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
 988                                  !((&sb->s_feature_compat)[(type)] & (mask)))
 989 #define FEATURE_CHANGED(type, mask) ((mask) & \
 990                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
 991
 992         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
 993         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
 994         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
 995
 996         if (e2p_edit_feature2(features, &sb->s_feature_compat,
 997                               ok_features, clear_ok_features,
 998                               &type_err, &mask_err)) {
 999                 if (!mask_err)
1000                         fprintf(stderr,
1001                                 _("Invalid filesystem option set: %s\n"),
1002                                 features);
1003                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1004                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1005                                           "not supported.\n"),
1006                                 e2p_feature2string(type_err &
1007                                                    E2P_FEATURE_TYPE_MASK,
1008                                                    mask_err));
1009                 else
1010                         fprintf(stderr, _("Setting filesystem feature '%s' "
1011                                           "not supported.\n"),
1012                                 e2p_feature2string(type_err, mask_err));
1013                 return 1;
1014         }
1015
1016         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1017                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1018                     !(mount_flags & EXT2_MF_READONLY)) {
1019                         fputs(_("The has_journal feature may only be "
1020                                 "cleared when the filesystem is\n"
1021                                 "unmounted or mounted "
1022                                 "read-only.\n"), stderr);
1023                         return 1;
1024                 }
1025                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1026                     f_flag < 2) {
1027                         fputs(_("The needs_recovery flag is set.  "
1028                                 "Please run e2fsck before clearing\n"
1029                                 "the has_journal flag.\n"), stderr);
1030                         return 1;
1031                 }
1032                 if (sb->s_journal_inum) {
1033                         if (remove_journal_inode(fs))
1034                                 return 1;
1035                 }
1036                 if (sb->s_journal_dev) {
1037                         if (remove_journal_device(fs))
1038                                 return 1;
1039                 }
1040         }
1041
1042         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1043                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1044                 if (ext2fs_has_feature_meta_bg(sb)) {
1045                         fputs(_("Setting filesystem feature 'sparse_super' "
1046                                 "not supported\nfor filesystems with "
1047                                 "the meta_bg feature enabled.\n"),
1048                                 stderr);
1049                         return 1;
1050                 }
1051         }
1052
1053         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1054                 int error;
1055
1056                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1057                     (mount_flags & EXT2_MF_READONLY)) {
1058                         fputs(_("The multiple mount protection feature can't\n"
1059                                 "be set if the filesystem is mounted or\n"
1060                                 "read-only.\n"), stderr);
1061                         return 1;
1062                 }
1063
1064                 error = ext2fs_mmp_init(fs);
1065                 if (error) {
1066                         fputs(_("\nError while enabling multiple mount "
1067                                 "protection feature."), stderr);
1068                         return 1;
1069                 }
1070
1071                 /*
1072                  * We want to update group desc with the new free blocks count
1073                  */
1074                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1075
1076                 printf(_("Multiple mount protection has been enabled "
1077                          "with update interval %ds.\n"),
1078                        sb->s_mmp_update_interval);
1079         }
1080
1081         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1082                 int error;
1083
1084                 if (mount_flags & EXT2_MF_READONLY) {
1085                         fputs(_("The multiple mount protection feature cannot\n"
1086                                 "be disabled if the filesystem is readonly.\n"),
1087                                 stderr);
1088                         return 1;
1089                 }
1090
1091                 error = ext2fs_read_bitmaps(fs);
1092                 if (error) {
1093                         fputs(_("Error while reading bitmaps\n"), stderr);
1094                         return 1;
1095                 }
1096
1097                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1098                 if (error) {
1099                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1100
1101                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1102                                 printf(_("Magic number in MMP block does not "
1103                                          "match. expected: %x, actual: %x\n"),
1104                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1105                         else
1106                                 com_err(program_name, error, "%s",
1107                                         _("while reading MMP block."));
1108                         goto mmp_error;
1109                 }
1110
1111                 /* We need to force out the group descriptors as well */
1112                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1113                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1114 mmp_error:
1115                 sb->s_mmp_block = 0;
1116                 sb->s_mmp_update_interval = 0;
1117         }
1118
1119         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1120                 /*
1121                  * If adding a journal flag, let the create journal
1122                  * code below handle setting the flag and creating the
1123                  * journal.  We supply a default size if necessary.
1124                  */
1125                 if (!journal_size)
1126                         journal_size = -1;
1127                 ext2fs_clear_feature_journal(sb);
1128         }
1129
1130         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1131                 if (!sb->s_def_hash_version)
1132                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1133                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1134                         uuid_generate((unsigned char *) sb->s_hash_seed);
1135         }
1136
1137         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1138                 if (ext2fs_check_desc(fs)) {
1139                         fputs(_("Clearing the flex_bg flag would "
1140                                 "cause the the filesystem to be\n"
1141                                 "inconsistent.\n"), stderr);
1142                         return 1;
1143                 }
1144         }
1145
1146         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1147                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1148                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1149                     !(mount_flags & EXT2_MF_READONLY)) {
1150                         fputs(_("The huge_file feature may only be "
1151                                 "cleared when the filesystem is\n"
1152                                 "unmounted or mounted "
1153                                 "read-only.\n"), stderr);
1154                         return 1;
1155                 }
1156         }
1157
1158         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1159                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1160                 check_fsck_needed(fs,
1161                         _("Enabling checksums could take some time."));
1162                 if (mount_flags & EXT2_MF_MOUNTED) {
1163                         fputs(_("Cannot enable metadata_csum on a mounted "
1164                                 "filesystem!\n"), stderr);
1165                         exit(1);
1166                 }
1167                 if (!ext2fs_has_feature_extents(fs->super))
1168                         printf("%s",
1169                                _("Extents are not enabled.  The file extent "
1170                                  "tree can be checksummed, whereas block maps "
1171                                  "cannot.  Not enabling extents reduces the "
1172                                  "coverage of metadata checksumming.  "
1173                                  "Re-run with -O extent to rectify.\n"));
1174                 if (!ext2fs_has_feature_64bit(fs->super))
1175                         printf("%s",
1176                                _("64-bit filesystem support is not enabled.  "
1177                                  "The larger fields afforded by this feature "
1178                                  "enable full-strength checksumming.  "
1179                                  "Run resize2fs -b to rectify.\n"));
1180                 rewrite_checksums = 1;
1181                 /* metadata_csum supersedes uninit_bg */
1182                 ext2fs_clear_feature_gdt_csum(fs->super);
1183
1184                 /* if uninit_bg was previously off, rewrite group desc */
1185                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1186                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1187                         enable_uninit_bg(fs);
1188
1189                 /*
1190                  * Since metadata_csum supersedes uninit_bg, pretend like
1191                  * uninit_bg has been off all along.
1192                  */
1193                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1194                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1195         }
1196
1197         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1198                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1199                 __u32   test_features[3];
1200
1201                 check_fsck_needed(fs,
1202                         _("Disabling checksums could take some time."));
1203                 if (mount_flags & EXT2_MF_MOUNTED) {
1204                         fputs(_("Cannot disable metadata_csum on a mounted "
1205                                 "filesystem!\n"), stderr);
1206                         exit(1);
1207                 }
1208                 rewrite_checksums = 1;
1209
1210                 /* Enable uninit_bg unless the user expressly turned it off */
1211                 memcpy(test_features, old_features, sizeof(test_features));
1212                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1213                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1214                 e2p_edit_feature2(features, test_features, ok_features,
1215                                   clear_ok_features, NULL, NULL);
1216                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1217                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1218                         ext2fs_set_feature_gdt_csum(fs->super);
1219
1220                 /*
1221                  * If we're turning off metadata_csum and not turning on
1222                  * uninit_bg, rewrite group desc.
1223                  */
1224                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1225                         err = disable_uninit_bg(fs,
1226                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1227                         if (err)
1228                                 return 1;
1229                 } else
1230                         /*
1231                          * metadata_csum previously provided uninit_bg, so if
1232                          * we're also setting the uninit_bg feature bit,
1233                          * pretend like it was previously enabled.  Checksums
1234                          * will be rewritten with crc16 later.
1235                          */
1236                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1237                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1238                 fs->super->s_checksum_seed = 0;
1239                 ext2fs_clear_feature_csum_seed(fs->super);
1240         }
1241
1242         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1243                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1244                 /* Do not enable uninit_bg when metadata_csum enabled */
1245                 if (ext2fs_has_feature_metadata_csum(fs->super))
1246                         ext2fs_clear_feature_gdt_csum(fs->super);
1247                 else
1248                         enable_uninit_bg(fs);
1249         }
1250
1251         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1252                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1253                 err = disable_uninit_bg(fs,
1254                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1255                 if (err)
1256                         return 1;
1257         }
1258
1259         /*
1260          * We don't actually toggle 64bit; resize2fs does that.  But this
1261          * must come after the metadata_csum feature_on so that it won't
1262          * complain about the lack of 64bit.
1263          */
1264         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1265                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1266                 if (mount_flags & EXT2_MF_MOUNTED) {
1267                         fprintf(stderr, _("Cannot enable 64-bit mode "
1268                                           "while mounted!\n"));
1269                         exit(1);
1270                 }
1271                 ext2fs_clear_feature_64bit(sb);
1272                 feature_64bit = 1;
1273         }
1274         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1275                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1276                 if (mount_flags & EXT2_MF_MOUNTED) {
1277                         fprintf(stderr, _("Cannot disable 64-bit mode "
1278                                           "while mounted!\n"));
1279                         exit(1);
1280                 }
1281                 ext2fs_set_feature_64bit(sb);
1282                 feature_64bit = -1;
1283         }
1284
1285         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1286                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1287                 /*
1288                  * Set the Q_flag here and handle the quota options in the code
1289                  * below.
1290                  */
1291                 if (!Q_flag) {
1292                         Q_flag = 1;
1293                         /* Enable usr/grp quota by default */
1294                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1295                                 if (qtype != PRJQUOTA)
1296                                         quota_enable[qtype] = QOPT_ENABLE;
1297                                 else
1298                                         quota_enable[qtype] = QOPT_DISABLE;
1299                         }
1300                 }
1301                 ext2fs_clear_feature_quota(sb);
1302         }
1303
1304         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1305                                 EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1306                 if (!Q_flag && !ext2fs_has_feature_quota(sb))
1307                         fputs(_("\nWarning: enabled project without quota together\n"),
1308                                 stderr);
1309                 Q_flag = 1;
1310                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1311         }
1312
1313         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1314                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1315                 /*
1316                  * Set the Q_flag here and handle the quota options in the code
1317                  * below.
1318                  */
1319                 if (Q_flag)
1320                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1321                                 "arguments.\n"), stderr);
1322                 Q_flag = 1;
1323                 /* Disable all quota by default */
1324                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1325                         quota_enable[qtype] = QOPT_DISABLE;
1326         }
1327
1328         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1329                 fs->super->s_encrypt_algos[0] =
1330                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1331                 fs->super->s_encrypt_algos[1] =
1332                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1333         }
1334
1335         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1336                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1337                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1338                         fputs(_("Setting feature 'metadata_csum_seed' "
1339                                 "is only supported\non filesystems with "
1340                                 "the metadata_csum feature enabled.\n"),
1341                                 stderr);
1342                         return 1;
1343                 }
1344                 try_confirm_csum_seed_support();
1345                 fs->super->s_checksum_seed = fs->csum_seed;
1346         }
1347
1348         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1349                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1350                 __le32 uuid_seed;
1351
1352                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1353                                         sizeof(fs->super->s_uuid));
1354                 if (fs->super->s_checksum_seed != uuid_seed &&
1355                     (mount_flags & EXT2_MF_MOUNTED)) {
1356                         fputs(_("UUID has changed since enabling "
1357                                 "metadata_csum.  Filesystem must be unmounted "
1358                                 "\nto safely rewrite all metadata to "
1359                                 "match the new UUID.\n"), stderr);
1360                         return 1;
1361                 }
1362
1363                 rewrite_checksums = 1;
1364         }
1365
1366         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1367             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1368              sb->s_feature_incompat))
1369                 ext2fs_update_dynamic_rev(fs);
1370
1371         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1372                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1373             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1374                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1375             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1376                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1377             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1378                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1379             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1380                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1381                 request_fsck_afterwards(fs);
1382
1383         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1384             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1385             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1386                 ext2fs_mark_super_dirty(fs);
1387
1388         return 0;
1389 }
1390
1391 /*
1392  * Add a journal to the filesystem.
1393  */
1394 static int add_journal(ext2_filsys fs)
1395 {
1396         unsigned long journal_blocks;
1397         errcode_t       retval;
1398         ext2_filsys     jfs;
1399         io_manager      io_ptr;
1400
1401         if (ext2fs_has_feature_journal(fs->super)) {
1402                 fputs(_("The filesystem already has a journal.\n"), stderr);
1403                 goto err;
1404         }
1405         if (journal_device) {
1406                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1407                                         NULL))
1408                         proceed_question(-1);
1409                 check_mount(journal_device, 0, _("journal"));
1410 #ifdef CONFIG_TESTIO_DEBUG
1411                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1412                         io_ptr = test_io_manager;
1413                         test_io_backing_manager = unix_io_manager;
1414                 } else
1415 #endif
1416                         io_ptr = unix_io_manager;
1417                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1418                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1419                                      fs->blocksize, io_ptr, &jfs);
1420                 if (retval) {
1421                         com_err(program_name, retval,
1422                                 _("\n\twhile trying to open journal on %s\n"),
1423                                 journal_device);
1424                         goto err;
1425                 }
1426                 printf(_("Creating journal on device %s: "),
1427                        journal_device);
1428                 fflush(stdout);
1429
1430                 retval = ext2fs_add_journal_device(fs, jfs);
1431                 ext2fs_close_free(&jfs);
1432                 if (retval) {
1433                         com_err(program_name, retval,
1434                                 _("while adding filesystem to journal on %s"),
1435                                 journal_device);
1436                         goto err;
1437                 }
1438                 fputs(_("done\n"), stdout);
1439         } else if (journal_size) {
1440                 fputs(_("Creating journal inode: "), stdout);
1441                 fflush(stdout);
1442                 journal_blocks = figure_journal_size(journal_size, fs);
1443
1444                 if (journal_location_string)
1445                         journal_location =
1446                                 parse_num_blocks2(journal_location_string,
1447                                                   fs->super->s_log_block_size);
1448                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1449                                                    journal_location,
1450                                                    journal_flags);
1451                 if (retval) {
1452                         fprintf(stderr, "\n");
1453                         com_err(program_name, retval, "%s",
1454                                 _("\n\twhile trying to create journal file"));
1455                         return retval;
1456                 } else
1457                         fputs(_("done\n"), stdout);
1458                 /*
1459                  * If the filesystem wasn't mounted, we need to force
1460                  * the block group descriptors out.
1461                  */
1462                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1463                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1464         }
1465         print_check_message(fs->super->s_max_mnt_count,
1466                             fs->super->s_checkinterval);
1467         return 0;
1468
1469 err:
1470         free(journal_device);
1471         return 1;
1472 }
1473
1474 static void handle_quota_options(ext2_filsys fs)
1475 {
1476         quota_ctx_t qctx;
1477         ext2_ino_t qf_ino;
1478         enum quota_type qtype;
1479         int enable = 0;
1480
1481         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1482                 if (quota_enable[qtype] != 0)
1483                         break;
1484         if (qtype == MAXQUOTAS)
1485                 /* Nothing to do. */
1486                 return;
1487
1488         quota_init_context(&qctx, fs, QUOTA_ALL_BIT);
1489         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1490                 if (quota_enable[qtype] == QOPT_ENABLE) {
1491                         enable = 1;
1492                         break;
1493                 }
1494         }
1495         if (enable)
1496                 quota_compute_usage(qctx);
1497
1498         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1499                 if (quota_enable[qtype] == QOPT_ENABLE &&
1500                     *quota_sb_inump(fs->super, qtype) == 0) {
1501                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0)
1502                                 quota_update_limits(qctx, qf_ino, qtype);
1503                         quota_write_inode(qctx, 1 << qtype);
1504                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1505                         quota_remove_inode(fs, qtype);
1506                 }
1507         }
1508
1509         quota_release_context(&qctx);
1510
1511         if (enable) {
1512                 ext2fs_set_feature_quota(fs->super);
1513                 ext2fs_mark_super_dirty(fs);
1514         } else {
1515                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1516                         if (*quota_sb_inump(fs->super, qtype) != 0)
1517                                 break;
1518                 if (qtype == MAXQUOTAS) {
1519                         fs->super->s_feature_ro_compat &=
1520                                         ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1521                         ext2fs_mark_super_dirty(fs);
1522                 }
1523         }
1524
1525         return;
1526 }
1527
1528 static int option_handle_function(char *token, void *data)
1529 {
1530         if (strncmp(token, "usr", 3) == 0) {
1531                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1532         } else if (strncmp(token, "^usr", 4) == 0) {
1533                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1534         } else if (strncmp(token, "grp", 3) == 0) {
1535                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1536         } else if (strncmp(token, "^grp", 4) == 0) {
1537                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1538         } else if (strncmp(token, "prj", 3) == 0) {
1539                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1540         } else if (strncmp(token, "^prj", 4) == 0) {
1541                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1542         } else {
1543                 fputs(_("\nBad quota options specified.\n\n"
1544                         "Following valid quota options are available "
1545                         "(pass by separating with comma):\n"
1546                         "\t[^]usr[quota]\n"
1547                         "\t[^]grp[quota]\n"
1548                         "\t[^]prj[quota]\n"
1549                         "\n\n"), stderr);
1550                 return 1;
1551         }
1552         return 0;
1553 }
1554
1555 static void parse_e2label_options(int argc, char ** argv)
1556 {
1557         if ((argc < 2) || (argc > 3)) {
1558                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1559                 exit(1);
1560         }
1561         io_options = strchr(argv[1], '?');
1562         if (io_options)
1563                 *io_options++ = 0;
1564         device_name = blkid_get_devname(NULL, argv[1], NULL);
1565         if (!device_name) {
1566                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1567                         argv[1]);
1568                 exit(1);
1569         }
1570         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1571         if (argc == 3) {
1572                 open_flag |= EXT2_FLAG_RW;
1573                 L_flag = 1;
1574                 new_label = argv[2];
1575         } else
1576                 print_label++;
1577 }
1578
1579 static time_t parse_time(char *str)
1580 {
1581         struct  tm      ts;
1582
1583         if (strcmp(str, "now") == 0) {
1584                 return (time(0));
1585         }
1586         memset(&ts, 0, sizeof(ts));
1587 #ifdef HAVE_STRPTIME
1588         strptime(str, "%Y%m%d%H%M%S", &ts);
1589 #else
1590         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1591                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1592         ts.tm_year -= 1900;
1593         ts.tm_mon -= 1;
1594         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1595             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1596             ts.tm_min > 59 || ts.tm_sec > 61)
1597                 ts.tm_mday = 0;
1598 #endif
1599         if (ts.tm_mday == 0) {
1600                 com_err(program_name, 0,
1601                         _("Couldn't parse date/time specifier: %s"),
1602                         str);
1603                 usage();
1604         }
1605         ts.tm_isdst = -1;
1606         return (mktime(&ts));
1607 }
1608
1609 static void parse_tune2fs_options(int argc, char **argv)
1610 {
1611         int c;
1612         char *tmp;
1613         struct group *gr;
1614         struct passwd *pw;
1615         int ret;
1616         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1617
1618         open_flag = 0;
1619         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1620         while ((c = getopt(argc, argv, optstring)) != EOF)
1621                 switch (c) {
1622                 case 'c':
1623                         max_mount_count = strtol(optarg, &tmp, 0);
1624                         if (*tmp || max_mount_count > 16000) {
1625                                 com_err(program_name, 0,
1626                                         _("bad mounts count - %s"),
1627                                         optarg);
1628                                 usage();
1629                         }
1630                         if (max_mount_count == 0)
1631                                 max_mount_count = -1;
1632                         c_flag = 1;
1633                         open_flag = EXT2_FLAG_RW;
1634                         break;
1635                 case 'C':
1636                         mount_count = strtoul(optarg, &tmp, 0);
1637                         if (*tmp || mount_count > 16000) {
1638                                 com_err(program_name, 0,
1639                                         _("bad mounts count - %s"),
1640                                         optarg);
1641                                 usage();
1642                         }
1643                         C_flag = 1;
1644                         open_flag = EXT2_FLAG_RW;
1645                         break;
1646                 case 'e':
1647                         if (strcmp(optarg, "continue") == 0)
1648                                 errors = EXT2_ERRORS_CONTINUE;
1649                         else if (strcmp(optarg, "remount-ro") == 0)
1650                                 errors = EXT2_ERRORS_RO;
1651                         else if (strcmp(optarg, "panic") == 0)
1652                                 errors = EXT2_ERRORS_PANIC;
1653                         else {
1654                                 com_err(program_name, 0,
1655                                         _("bad error behavior - %s"),
1656                                         optarg);
1657                                 usage();
1658                         }
1659                         e_flag = 1;
1660                         open_flag = EXT2_FLAG_RW;
1661                         break;
1662                 case 'E':
1663                         extended_cmd = optarg;
1664                         open_flag |= EXT2_FLAG_RW;
1665                         break;
1666                 case 'f': /* Force */
1667                         f_flag++;
1668                         break;
1669                 case 'g':
1670                         resgid = strtoul(optarg, &tmp, 0);
1671                         if (*tmp) {
1672                                 gr = getgrnam(optarg);
1673                                 if (gr == NULL)
1674                                         tmp = optarg;
1675                                 else {
1676                                         resgid = gr->gr_gid;
1677                                         *tmp = 0;
1678                                 }
1679                         }
1680                         if (*tmp) {
1681                                 com_err(program_name, 0,
1682                                         _("bad gid/group name - %s"),
1683                                         optarg);
1684                                 usage();
1685                         }
1686                         g_flag = 1;
1687                         open_flag = EXT2_FLAG_RW;
1688                         break;
1689                 case 'i':
1690                         interval = strtoul(optarg, &tmp, 0);
1691                         switch (*tmp) {
1692                         case 's':
1693                                 tmp++;
1694                                 break;
1695                         case '\0':
1696                         case 'd':
1697                         case 'D': /* days */
1698                                 interval *= 86400;
1699                                 if (*tmp != '\0')
1700                                         tmp++;
1701                                 break;
1702                         case 'm':
1703                         case 'M': /* months! */
1704                                 interval *= 86400 * 30;
1705                                 tmp++;
1706                                 break;
1707                         case 'w':
1708                         case 'W': /* weeks */
1709                                 interval *= 86400 * 7;
1710                                 tmp++;
1711                                 break;
1712                         }
1713                         if (*tmp) {
1714                                 com_err(program_name, 0,
1715                                         _("bad interval - %s"), optarg);
1716                                 usage();
1717                         }
1718                         i_flag = 1;
1719                         open_flag = EXT2_FLAG_RW;
1720                         break;
1721                 case 'j':
1722                         if (!journal_size)
1723                                 journal_size = -1;
1724                         open_flag = EXT2_FLAG_RW;
1725                         break;
1726                 case 'J':
1727                         parse_journal_opts(optarg);
1728                         open_flag = EXT2_FLAG_RW;
1729                         break;
1730                 case 'l':
1731                         l_flag = 1;
1732                         break;
1733                 case 'L':
1734                         new_label = optarg;
1735                         L_flag = 1;
1736                         open_flag |= EXT2_FLAG_RW |
1737                                 EXT2_FLAG_JOURNAL_DEV_OK;
1738                         break;
1739                 case 'm':
1740                         reserved_ratio = strtod(optarg, &tmp);
1741                         if (*tmp || reserved_ratio > 50 ||
1742                             reserved_ratio < 0) {
1743                                 com_err(program_name, 0,
1744                                         _("bad reserved block ratio - %s"),
1745                                         optarg);
1746                                 usage();
1747                         }
1748                         m_flag = 1;
1749                         open_flag = EXT2_FLAG_RW;
1750                         break;
1751                 case 'M':
1752                         new_last_mounted = optarg;
1753                         M_flag = 1;
1754                         open_flag = EXT2_FLAG_RW;
1755                         break;
1756                 case 'o':
1757                         if (mntopts_cmd) {
1758                                 com_err(program_name, 0, "%s",
1759                                         _("-o may only be specified once"));
1760                                 usage();
1761                         }
1762                         mntopts_cmd = optarg;
1763                         open_flag = EXT2_FLAG_RW;
1764                         break;
1765                 case 'O':
1766                         if (features_cmd) {
1767                                 com_err(program_name, 0, "%s",
1768                                         _("-O may only be specified once"));
1769                                 usage();
1770                         }
1771                         features_cmd = optarg;
1772                         open_flag = EXT2_FLAG_RW;
1773                         break;
1774                 case 'Q':
1775                         Q_flag = 1;
1776                         ret = parse_quota_opts(optarg, option_handle_function,
1777                                                NULL);
1778                         if (ret)
1779                                 exit(1);
1780                         open_flag = EXT2_FLAG_RW;
1781                         break;
1782                 case 'r':
1783                         reserved_blocks = strtoul(optarg, &tmp, 0);
1784                         if (*tmp) {
1785                                 com_err(program_name, 0,
1786                                         _("bad reserved blocks count - %s"),
1787                                         optarg);
1788                                 usage();
1789                         }
1790                         r_flag = 1;
1791                         open_flag = EXT2_FLAG_RW;
1792                         break;
1793                 case 's': /* Deprecated */
1794                         s_flag = atoi(optarg);
1795                         open_flag = EXT2_FLAG_RW;
1796                         break;
1797                 case 'T':
1798                         T_flag = 1;
1799                         last_check_time = parse_time(optarg);
1800                         open_flag = EXT2_FLAG_RW;
1801                         break;
1802                 case 'u':
1803                                 resuid = strtoul(optarg, &tmp, 0);
1804                                 if (*tmp) {
1805                                         pw = getpwnam(optarg);
1806                                         if (pw == NULL)
1807                                                 tmp = optarg;
1808                                         else {
1809                                                 resuid = pw->pw_uid;
1810                                                 *tmp = 0;
1811                                         }
1812                                 }
1813                                 if (*tmp) {
1814                                         com_err(program_name, 0,
1815                                                 _("bad uid/user name - %s"),
1816                                                 optarg);
1817                                         usage();
1818                                 }
1819                                 u_flag = 1;
1820                                 open_flag = EXT2_FLAG_RW;
1821                                 break;
1822                 case 'U':
1823                         new_UUID = optarg;
1824                         U_flag = 1;
1825                         open_flag = EXT2_FLAG_RW |
1826                                 EXT2_FLAG_JOURNAL_DEV_OK;
1827                         break;
1828                 case 'I':
1829                         new_inode_size = strtoul(optarg, &tmp, 0);
1830                         if (*tmp) {
1831                                 com_err(program_name, 0,
1832                                         _("bad inode size - %s"),
1833                                         optarg);
1834                                 usage();
1835                         }
1836                         if (!((new_inode_size &
1837                                (new_inode_size - 1)) == 0)) {
1838                                 com_err(program_name, 0,
1839                                         _("Inode size must be a "
1840                                           "power of two- %s"),
1841                                         optarg);
1842                                 usage();
1843                         }
1844                         open_flag = EXT2_FLAG_RW;
1845                         I_flag = 1;
1846                         break;
1847                 case 'z':
1848                         undo_file = optarg;
1849                         break;
1850                 default:
1851                         usage();
1852                 }
1853         if (optind < argc - 1 || optind == argc)
1854                 usage();
1855         if (!open_flag && !l_flag)
1856                 usage();
1857         io_options = strchr(argv[optind], '?');
1858         if (io_options)
1859                 *io_options++ = 0;
1860         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1861         if (!device_name) {
1862                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1863                         argv[optind]);
1864                 exit(1);
1865         }
1866 }
1867
1868 #ifdef CONFIG_BUILD_FINDFS
1869 void do_findfs(int argc, char **argv)
1870 {
1871         char    *dev;
1872
1873         if ((argc != 2) ||
1874             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1875                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1876                 exit(2);
1877         }
1878         dev = blkid_get_devname(NULL, argv[1], NULL);
1879         if (!dev) {
1880                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1881                         argv[1]);
1882                 exit(1);
1883         }
1884         puts(dev);
1885         exit(0);
1886 }
1887 #endif
1888
1889 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1890 {
1891         char    *buf, *token, *next, *p, *arg;
1892         int     len, hash_alg;
1893         int     r_usage = 0;
1894
1895         len = strlen(opts);
1896         buf = malloc(len+1);
1897         if (!buf) {
1898                 fprintf(stderr, "%s",
1899                         _("Couldn't allocate memory to parse options!\n"));
1900                 return 1;
1901         }
1902         strcpy(buf, opts);
1903         for (token = buf; token && *token; token = next) {
1904                 p = strchr(token, ',');
1905                 next = 0;
1906                 if (p) {
1907                         *p = 0;
1908                         next = p+1;
1909                 }
1910                 arg = strchr(token, '=');
1911                 if (arg) {
1912                         *arg = 0;
1913                         arg++;
1914                 }
1915                 if (strcmp(token, "clear-mmp") == 0 ||
1916                     strcmp(token, "clear_mmp") == 0) {
1917                         clear_mmp = 1;
1918                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1919                         unsigned long intv;
1920                         if (!arg) {
1921                                 r_usage++;
1922                                 continue;
1923                         }
1924                         intv = strtoul(arg, &p, 0);
1925                         if (*p) {
1926                                 fprintf(stderr,
1927                                         _("Invalid mmp_update_interval: %s\n"),
1928                                         arg);
1929                                 r_usage++;
1930                                 continue;
1931                         }
1932                         if (intv == 0) {
1933                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1934                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1935                                 fprintf(stderr,
1936                                         _("mmp_update_interval too big: %lu\n"),
1937                                         intv);
1938                                 r_usage++;
1939                                 continue;
1940                         }
1941                         printf(P_("Setting multiple mount protection update "
1942                                   "interval to %lu second\n",
1943                                   "Setting multiple mount protection update "
1944                                   "interval to %lu seconds\n", intv),
1945                                intv);
1946                         fs->super->s_mmp_update_interval = intv;
1947                         ext2fs_mark_super_dirty(fs);
1948                 } else if (!strcmp(token, "test_fs")) {
1949                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
1950                         printf("Setting test filesystem flag\n");
1951                         ext2fs_mark_super_dirty(fs);
1952                 } else if (!strcmp(token, "^test_fs")) {
1953                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
1954                         printf("Clearing test filesystem flag\n");
1955                         ext2fs_mark_super_dirty(fs);
1956                 } else if (strcmp(token, "stride") == 0) {
1957                         if (!arg) {
1958                                 r_usage++;
1959                                 continue;
1960                         }
1961                         stride = strtoul(arg, &p, 0);
1962                         if (*p) {
1963                                 fprintf(stderr,
1964                                         _("Invalid RAID stride: %s\n"),
1965                                         arg);
1966                                 r_usage++;
1967                                 continue;
1968                         }
1969                         stride_set = 1;
1970                 } else if (strcmp(token, "stripe-width") == 0 ||
1971                            strcmp(token, "stripe_width") == 0) {
1972                         if (!arg) {
1973                                 r_usage++;
1974                                 continue;
1975                         }
1976                         stripe_width = strtoul(arg, &p, 0);
1977                         if (*p) {
1978                                 fprintf(stderr,
1979                                         _("Invalid RAID stripe-width: %s\n"),
1980                                         arg);
1981                                 r_usage++;
1982                                 continue;
1983                         }
1984                         stripe_width_set = 1;
1985                 } else if (strcmp(token, "hash_alg") == 0 ||
1986                            strcmp(token, "hash-alg") == 0) {
1987                         if (!arg) {
1988                                 r_usage++;
1989                                 continue;
1990                         }
1991                         hash_alg = e2p_string2hash(arg);
1992                         if (hash_alg < 0) {
1993                                 fprintf(stderr,
1994                                         _("Invalid hash algorithm: %s\n"),
1995                                         arg);
1996                                 r_usage++;
1997                                 continue;
1998                         }
1999                         fs->super->s_def_hash_version = hash_alg;
2000                         printf(_("Setting default hash algorithm "
2001                                  "to %s (%d)\n"),
2002                                arg, hash_alg);
2003                         ext2fs_mark_super_dirty(fs);
2004                 } else if (!strcmp(token, "mount_opts")) {
2005                         if (!arg) {
2006                                 r_usage++;
2007                                 continue;
2008                         }
2009                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2010                                 fprintf(stderr,
2011                                         "Extended mount options too long\n");
2012                                 continue;
2013                         }
2014                         ext_mount_opts = strdup(arg);
2015                 } else
2016                         r_usage++;
2017         }
2018         if (r_usage) {
2019                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2020                         "Extended options are separated by commas, "
2021                         "and may take an argument which\n"
2022                         "\tis set off by an equals ('=') sign.\n\n"
2023                         "Valid extended options are:\n"
2024                         "\tclear_mmp\n"
2025                         "\thash_alg=<hash algorithm>\n"
2026                         "\tmount_opts=<extended default mount options>\n"
2027                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2028                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2029                         "\ttest_fs\n"
2030                         "\t^test_fs\n"));
2031                 free(buf);
2032                 return 1;
2033         }
2034         free(buf);
2035
2036         return 0;
2037 }
2038
2039 /*
2040  * Fill in the block bitmap bmap with the information regarding the
2041  * blocks to be moved
2042  */
2043 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2044                             ext2fs_block_bitmap bmap)
2045 {
2046         dgrp_t i;
2047         int retval;
2048         ext2_badblocks_list bb_list = 0;
2049         blk64_t j, needed_blocks = 0;
2050         blk64_t start_blk, end_blk;
2051
2052         retval = ext2fs_read_bb_inode(fs, &bb_list);
2053         if (retval)
2054                 return retval;
2055
2056         for (i = 0; i < fs->group_desc_count; i++) {
2057                 start_blk = ext2fs_inode_table_loc(fs, i) +
2058                                         fs->inode_blocks_per_group;
2059
2060                 end_blk = ext2fs_inode_table_loc(fs, i) +
2061                                         new_ino_blks_per_grp;
2062
2063                 for (j = start_blk; j < end_blk; j++) {
2064                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2065                                 /*
2066                                  * IF the block is a bad block we fail
2067                                  */
2068                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2069                                         ext2fs_badblocks_list_free(bb_list);
2070                                         return ENOSPC;
2071                                 }
2072
2073                                 ext2fs_mark_block_bitmap2(bmap, j);
2074                         } else {
2075                                 /*
2076                                  * We are going to use this block for
2077                                  * inode table. So mark them used.
2078                                  */
2079                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2080                         }
2081                 }
2082                 needed_blocks += end_blk - start_blk;
2083         }
2084
2085         ext2fs_badblocks_list_free(bb_list);
2086         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2087                 return ENOSPC;
2088
2089         return 0;
2090 }
2091
2092 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2093 {
2094         dgrp_t group;
2095         group = ext2fs_group_of_blk2(fs, blk);
2096         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2097                 return 1;
2098         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2099                 return 1;
2100         return 0;
2101 }
2102
2103 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2104 {
2105         blk64_t start_blk, end_blk;
2106         start_blk = fs->super->s_first_data_block +
2107                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2108         /*
2109          * We cannot get new block beyond end_blk for for the last block group
2110          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2111          */
2112         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2113         if (blk >= start_blk && blk <= end_blk)
2114                 return 1;
2115         return 0;
2116 }
2117
2118 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2119 {
2120
2121         char *buf;
2122         dgrp_t group = 0;
2123         errcode_t retval;
2124         int meta_data = 0;
2125         blk64_t blk, new_blk, goal;
2126         struct blk_move *bmv;
2127
2128         retval = ext2fs_get_mem(fs->blocksize, &buf);
2129         if (retval)
2130                 return retval;
2131
2132         for (new_blk = blk = fs->super->s_first_data_block;
2133              blk < ext2fs_blocks_count(fs->super); blk++) {
2134                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2135                         continue;
2136
2137                 if (ext2fs_is_meta_block(fs, blk)) {
2138                         /*
2139                          * If the block is mapping a fs meta data block
2140                          * like group desc/block bitmap/inode bitmap. We
2141                          * should find a block in the same group and fix
2142                          * the respective fs metadata pointers. Otherwise
2143                          * fail
2144                          */
2145                         group = ext2fs_group_of_blk2(fs, blk);
2146                         goal = ext2fs_group_first_block2(fs, group);
2147                         meta_data = 1;
2148
2149                 } else {
2150                         goal = new_blk;
2151                 }
2152                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2153                 if (retval)
2154                         goto err_out;
2155
2156                 /* new fs meta data block should be in the same group */
2157                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2158                         retval = ENOSPC;
2159                         goto err_out;
2160                 }
2161
2162                 /* Mark this block as allocated */
2163                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2164
2165                 /* Add it to block move list */
2166                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2167                 if (retval)
2168                         goto err_out;
2169
2170                 bmv->old_loc = blk;
2171                 bmv->new_loc = new_blk;
2172
2173                 list_add(&(bmv->list), &blk_move_list);
2174
2175                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2176                 if (retval)
2177                         goto err_out;
2178
2179                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2180                 if (retval)
2181                         goto err_out;
2182         }
2183
2184 err_out:
2185         ext2fs_free_mem(&buf);
2186         return retval;
2187 }
2188
2189 static blk64_t translate_block(blk64_t blk)
2190 {
2191         struct list_head *entry;
2192         struct blk_move *bmv;
2193
2194         list_for_each(entry, &blk_move_list) {
2195                 bmv = list_entry(entry, struct blk_move, list);
2196                 if (bmv->old_loc == blk)
2197                         return bmv->new_loc;
2198         }
2199
2200         return 0;
2201 }
2202
2203 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2204                          blk64_t *block_nr,
2205                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2206                          blk64_t ref_block EXT2FS_ATTR((unused)),
2207                          int ref_offset EXT2FS_ATTR((unused)),
2208                          void *priv_data)
2209 {
2210         int ret = 0;
2211         blk64_t new_blk;
2212         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2213
2214         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2215                 return 0;
2216         new_blk = translate_block(*block_nr);
2217         if (new_blk) {
2218                 *block_nr = new_blk;
2219                 /*
2220                  * This will force the ext2fs_write_inode in the iterator
2221                  */
2222                 ret |= BLOCK_CHANGED;
2223         }
2224
2225         return ret;
2226 }
2227
2228 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2229 {
2230         errcode_t retval = 0;
2231         ext2_ino_t ino;
2232         blk64_t blk;
2233         char *block_buf = 0;
2234         struct ext2_inode inode;
2235         ext2_inode_scan scan = NULL;
2236
2237         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2238         if (retval)
2239                 return retval;
2240
2241         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2242         if (retval)
2243                 goto err_out;
2244
2245         while (1) {
2246                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2247                 if (retval)
2248                         goto err_out;
2249
2250                 if (!ino)
2251                         break;
2252
2253                 if (inode.i_links_count == 0)
2254                         continue; /* inode not in use */
2255
2256                 /* FIXME!!
2257                  * If we end up modifying the journal inode
2258                  * the sb->s_jnl_blocks will differ. But a
2259                  * subsequent e2fsck fixes that.
2260                  * Do we need to fix this ??
2261                  */
2262
2263                 if (ext2fs_file_acl_block(fs, &inode) &&
2264                     ext2fs_test_block_bitmap2(bmap,
2265                                         ext2fs_file_acl_block(fs, &inode))) {
2266                         blk = translate_block(ext2fs_file_acl_block(fs,
2267                                                                     &inode));
2268                         if (!blk)
2269                                 continue;
2270
2271                         ext2fs_file_acl_block_set(fs, &inode, blk);
2272
2273                         /*
2274                          * Write the inode to disk so that inode table
2275                          * resizing can work
2276                          */
2277                         retval = ext2fs_write_inode(fs, ino, &inode);
2278                         if (retval)
2279                                 goto err_out;
2280                 }
2281
2282                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2283                         continue;
2284
2285                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2286                                                process_block, bmap);
2287                 if (retval)
2288                         goto err_out;
2289
2290         }
2291
2292 err_out:
2293         ext2fs_free_mem(&block_buf);
2294         ext2fs_close_inode_scan(scan);
2295
2296         return retval;
2297 }
2298
2299 /*
2300  * We need to scan for inode and block bitmaps that may need to be
2301  * moved.  This can take place if the filesystem was formatted for
2302  * RAID arrays using the mke2fs's extended option "stride".
2303  */
2304 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2305 {
2306         dgrp_t i;
2307         blk64_t blk, new_blk;
2308
2309         for (i = 0; i < fs->group_desc_count; i++) {
2310                 blk = ext2fs_block_bitmap_loc(fs, i);
2311                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2312                         new_blk = translate_block(blk);
2313                         if (!new_blk)
2314                                 continue;
2315                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2316                 }
2317
2318                 blk = ext2fs_inode_bitmap_loc(fs, i);
2319                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2320                         new_blk = translate_block(blk);
2321                         if (!new_blk)
2322                                 continue;
2323                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2324                 }
2325         }
2326         return 0;
2327 }
2328
2329 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2330 {
2331         dgrp_t i;
2332         blk64_t blk;
2333         errcode_t retval;
2334         int new_ino_blks_per_grp;
2335         unsigned int j;
2336         char *old_itable = NULL, *new_itable = NULL;
2337         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2338         unsigned long old_ino_size;
2339         int old_itable_size, new_itable_size;
2340
2341         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2342         old_ino_size = EXT2_INODE_SIZE(fs->super);
2343
2344         new_ino_blks_per_grp = ext2fs_div_ceil(
2345                                         EXT2_INODES_PER_GROUP(fs->super) *
2346                                         new_ino_size,
2347                                         fs->blocksize);
2348
2349         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2350
2351         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2352         if (retval)
2353                 return retval;
2354
2355         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2356         if (retval)
2357                 goto err_out;
2358
2359         tmp_old_itable = old_itable;
2360         tmp_new_itable = new_itable;
2361
2362         for (i = 0; i < fs->group_desc_count; i++) {
2363                 blk = ext2fs_inode_table_loc(fs, i);
2364                 retval = io_channel_read_blk64(fs->io, blk,
2365                                 fs->inode_blocks_per_group, old_itable);
2366                 if (retval)
2367                         goto err_out;
2368
2369                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2370                         memcpy(new_itable, old_itable, old_ino_size);
2371
2372                         memset(new_itable+old_ino_size, 0,
2373                                         new_ino_size - old_ino_size);
2374
2375                         new_itable += new_ino_size;
2376                         old_itable += old_ino_size;
2377                 }
2378
2379                 /* reset the pointer */
2380                 old_itable = tmp_old_itable;
2381                 new_itable = tmp_new_itable;
2382
2383                 retval = io_channel_write_blk64(fs->io, blk,
2384                                         new_ino_blks_per_grp, new_itable);
2385                 if (retval)
2386                         goto err_out;
2387         }
2388
2389         /* Update the meta data */
2390         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2391         ext2fs_free_inode_cache(fs->icache);
2392         fs->icache = 0;
2393         fs->super->s_inode_size = new_ino_size;
2394
2395 err_out:
2396         if (old_itable)
2397                 ext2fs_free_mem(&old_itable);
2398
2399         if (new_itable)
2400                 ext2fs_free_mem(&new_itable);
2401
2402         return retval;
2403 }
2404
2405 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2406 {
2407         blk64_t         blk;
2408         ext2_ino_t      ino;
2409         unsigned int    group = 0;
2410         unsigned int    count = 0;
2411         int             total_free = 0;
2412         int             group_free = 0;
2413
2414         /*
2415          * First calculate the block statistics
2416          */
2417         for (blk = fs->super->s_first_data_block;
2418              blk < ext2fs_blocks_count(fs->super); blk++) {
2419                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2420                         group_free++;
2421                         total_free++;
2422                 }
2423                 count++;
2424                 if ((count == fs->super->s_blocks_per_group) ||
2425                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2426                         ext2fs_bg_free_blocks_count_set(fs, group++,
2427                                                         group_free);
2428                         count = 0;
2429                         group_free = 0;
2430                 }
2431         }
2432         total_free = EXT2FS_C2B(fs, total_free);
2433         ext2fs_free_blocks_count_set(fs->super, total_free);
2434
2435         /*
2436          * Next, calculate the inode statistics
2437          */
2438         group_free = 0;
2439         total_free = 0;
2440         count = 0;
2441         group = 0;
2442
2443         /* Protect loop from wrap-around if s_inodes_count maxed */
2444         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2445                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2446                         group_free++;
2447                         total_free++;
2448                 }
2449                 count++;
2450                 if ((count == fs->super->s_inodes_per_group) ||
2451                     (ino == fs->super->s_inodes_count)) {
2452                         ext2fs_bg_free_inodes_count_set(fs, group++,
2453                                                         group_free);
2454                         count = 0;
2455                         group_free = 0;
2456                 }
2457         }
2458         fs->super->s_free_inodes_count = total_free;
2459         ext2fs_mark_super_dirty(fs);
2460         return 0;
2461 }
2462
2463 #define list_for_each_safe(pos, pnext, head) \
2464         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2465              pos = pnext, pnext = pos->next)
2466
2467 static void free_blk_move_list(void)
2468 {
2469         struct list_head *entry, *tmp;
2470         struct blk_move *bmv;
2471
2472         list_for_each_safe(entry, tmp, &blk_move_list) {
2473                 bmv = list_entry(entry, struct blk_move, list);
2474                 list_del(entry);
2475                 ext2fs_free_mem(&bmv);
2476         }
2477         return;
2478 }
2479
2480 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2481 {
2482         errcode_t retval;
2483         int new_ino_blks_per_grp;
2484         ext2fs_block_bitmap bmap;
2485
2486         retval = ext2fs_read_inode_bitmap(fs);
2487         if (retval) {
2488                 fputs(_("Failed to read inode bitmap\n"), stderr);
2489                 return retval;
2490         }
2491         retval = ext2fs_read_block_bitmap(fs);
2492         if (retval) {
2493                 fputs(_("Failed to read block bitmap\n"), stderr);
2494                 return retval;
2495         }
2496         INIT_LIST_HEAD(&blk_move_list);
2497
2498
2499         new_ino_blks_per_grp = ext2fs_div_ceil(
2500                                         EXT2_INODES_PER_GROUP(fs->super)*
2501                                         new_size,
2502                                         fs->blocksize);
2503
2504         /* We may change the file system.
2505          * Mark the file system as invalid so that
2506          * the user is prompted to run fsck.
2507          */
2508         fs->super->s_state &= ~EXT2_VALID_FS;
2509
2510         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2511                                                 &bmap);
2512         if (retval) {
2513                 fputs(_("Failed to allocate block bitmap when "
2514                                 "increasing inode size\n"), stderr);
2515                 return retval;
2516         }
2517         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2518         if (retval) {
2519                 fputs(_("Not enough space to increase inode size \n"), stderr);
2520                 goto err_out;
2521         }
2522         retval = move_block(fs, bmap);
2523         if (retval) {
2524                 fputs(_("Failed to relocate blocks during inode resize \n"),
2525                       stderr);
2526                 goto err_out;
2527         }
2528         retval = inode_scan_and_fix(fs, bmap);
2529         if (retval)
2530                 goto err_out_undo;
2531
2532         retval = group_desc_scan_and_fix(fs, bmap);
2533         if (retval)
2534                 goto err_out_undo;
2535
2536         retval = expand_inode_table(fs, new_size);
2537         if (retval)
2538                 goto err_out_undo;
2539
2540         ext2fs_calculate_summary_stats(fs);
2541
2542         fs->super->s_state |= EXT2_VALID_FS;
2543         /* mark super block and block bitmap as dirty */
2544         ext2fs_mark_super_dirty(fs);
2545         ext2fs_mark_bb_dirty(fs);
2546
2547 err_out:
2548         free_blk_move_list();
2549         ext2fs_free_block_bitmap(bmap);
2550
2551         return retval;
2552
2553 err_out_undo:
2554         free_blk_move_list();
2555         ext2fs_free_block_bitmap(bmap);
2556         fputs(_("Error in resizing the inode size.\n"
2557                         "Run e2undo to undo the "
2558                         "file system changes. \n"), stderr);
2559
2560         return retval;
2561 }
2562
2563 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2564 {
2565         errcode_t retval = 0;
2566         const char *tdb_dir;
2567         char *tdb_file = NULL;
2568         char *dev_name, *tmp_name;
2569
2570         /* (re)open a specific undo file */
2571         if (undo_file && undo_file[0] != 0) {
2572                 retval = set_undo_io_backing_manager(*io_ptr);
2573                 if (retval)
2574                         goto err;
2575                 *io_ptr = undo_io_manager;
2576                 retval = set_undo_io_backup_file(undo_file);
2577                 if (retval)
2578                         goto err;
2579                 printf(_("Overwriting existing filesystem; this can be undone "
2580                          "using the command:\n"
2581                          "    e2undo %s %s\n\n"),
2582                          undo_file, name);
2583                 return retval;
2584         }
2585
2586         /*
2587          * Configuration via a conf file would be
2588          * nice
2589          */
2590         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2591         if (!tdb_dir)
2592                 tdb_dir = "/var/lib/e2fsprogs";
2593
2594         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2595             access(tdb_dir, W_OK))
2596                 return 0;
2597
2598         tmp_name = strdup(name);
2599         if (!tmp_name)
2600                 goto errout;
2601         dev_name = basename(tmp_name);
2602         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2603         if (!tdb_file) {
2604                 free(tmp_name);
2605                 goto errout;
2606         }
2607         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2608         free(tmp_name);
2609
2610         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2611                 retval = errno;
2612                 com_err(program_name, retval,
2613                         _("while trying to delete %s"), tdb_file);
2614                 goto errout;
2615         }
2616
2617         retval = set_undo_io_backing_manager(*io_ptr);
2618         if (retval)
2619                 goto errout;
2620         *io_ptr = undo_io_manager;
2621         retval = set_undo_io_backup_file(tdb_file);
2622         if (retval)
2623                 goto errout;
2624         printf(_("Overwriting existing filesystem; this can be undone "
2625                  "using the command:\n"
2626                  "    e2undo %s %s\n\n"),
2627                  tdb_file, name);
2628
2629         free(tdb_file);
2630         return 0;
2631 errout:
2632         free(tdb_file);
2633 err:
2634         com_err("tune2fs", retval, "while trying to setup undo file\n");
2635         return retval;
2636 }
2637
2638 static int
2639 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2640 {
2641         int retval, nr_users, start;
2642         journal_superblock_t *jsb;
2643         ext2_filsys jfs;
2644         __u8 *j_uuid;
2645         char *journal_path;
2646         char uuid[UUID_STR_SIZE];
2647         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2648
2649         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2650                 return 0;
2651
2652         uuid_unparse(sb->s_journal_uuid, uuid);
2653         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2654         if (!journal_path)
2655                 return 0;
2656
2657         retval = ext2fs_open2(journal_path, io_options,
2658                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2659                               0, 0, unix_io_manager, &jfs);
2660         if (retval) {
2661                 com_err(program_name, retval,
2662                         _("while trying to open %s"),
2663                         journal_path);
2664                 return retval;
2665         }
2666
2667         retval = get_journal_sb(jfs, buf);
2668         if (retval != 0) {
2669                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2670                         fprintf(stderr, _("%s is not a journal device.\n"),
2671                                 journal_path);
2672                 return retval;
2673         }
2674
2675         jsb = (journal_superblock_t *) buf;
2676         /* Find the filesystem UUID */
2677         nr_users = ntohl(jsb->s_nr_users);
2678
2679         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2680         if (j_uuid == NULL) {
2681                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2682                       stderr);
2683                 return EXT2_ET_LOAD_EXT_JOURNAL;
2684         }
2685
2686         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2687
2688         start = ext2fs_journal_sb_start(jfs->blocksize);
2689         /* Write back the journal superblock */
2690         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2691         if (retval != 0) {
2692                 com_err(program_name, retval,
2693                         "while writing journal superblock.");
2694                 return retval;
2695         }
2696
2697         ext2fs_close(jfs);
2698
2699         return 0;
2700 }
2701
2702 #ifndef BUILD_AS_LIB
2703 int main(int argc, char **argv)
2704 #else
2705 int tune2fs_main(int argc, char **argv)
2706 #endif  /* BUILD_AS_LIB */
2707 {
2708         errcode_t retval;
2709         ext2_filsys fs;
2710         struct ext2_super_block *sb;
2711         io_manager io_ptr, io_ptr_orig = NULL;
2712         int rc = 0;
2713         char default_undo_file[1] = { 0 };
2714
2715 #ifdef ENABLE_NLS
2716         setlocale(LC_MESSAGES, "");
2717         setlocale(LC_CTYPE, "");
2718         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2719         textdomain(NLS_CAT_NAME);
2720         set_com_err_gettext(gettext);
2721 #endif
2722         if (argc && *argv)
2723                 program_name = *argv;
2724         add_error_table(&et_ext2_error_table);
2725
2726 #ifdef CONFIG_BUILD_FINDFS
2727         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2728                 do_findfs(argc, argv);
2729 #endif
2730         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2731                 parse_e2label_options(argc, argv);
2732         else
2733                 parse_tune2fs_options(argc, argv);
2734
2735 #ifdef CONFIG_TESTIO_DEBUG
2736         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2737                 io_ptr = test_io_manager;
2738                 test_io_backing_manager = unix_io_manager;
2739         } else
2740 #endif
2741                 io_ptr = unix_io_manager;
2742
2743 retry_open:
2744         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2745                 open_flag |= EXT2_FLAG_SKIP_MMP;
2746
2747         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2748
2749         /* keep the filesystem struct around to dump MMP data */
2750         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2751
2752         retval = ext2fs_open2(device_name, io_options, open_flag,
2753                               0, 0, io_ptr, &fs);
2754         if (retval) {
2755                 com_err(program_name, retval,
2756                         _("while trying to open %s"),
2757                         device_name);
2758                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2759                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2760                         dump_mmp_msg(fs->mmp_buf,
2761                                      _("If you are sure the filesystem "
2762                                        "is not in use on any node, run:\n"
2763                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2764                 else if (retval == EXT2_ET_MMP_FAILED)
2765                         dump_mmp_msg(fs->mmp_buf, NULL);
2766                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2767                         fprintf(stderr,
2768                                 _("MMP block magic is bad. Try to fix it by "
2769                                   "running:\n'e2fsck -f %s'\n"), device_name);
2770                 else if (retval == EXT2_ET_BAD_MAGIC)
2771                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2772                 else if (retval != EXT2_ET_MMP_FAILED)
2773                         fprintf(stderr, "%s",
2774                              _("Couldn't find valid filesystem superblock.\n"));
2775
2776                 ext2fs_free(fs);
2777                 exit(1);
2778         }
2779         if (ext2fs_has_feature_journal_dev(fs->super)) {
2780                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2781                 ext2fs_free(fs);
2782                 exit(1);
2783         }
2784         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2785
2786         if (I_flag) {
2787                 /*
2788                  * Check the inode size is right so we can issue an
2789                  * error message and bail before setting up the tdb
2790                  * file.
2791                  */
2792                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2793                         fprintf(stderr, _("The inode size is already %lu\n"),
2794                                 new_inode_size);
2795                         rc = 1;
2796                         goto closefs;
2797                 }
2798                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2799                         fprintf(stderr, "%s",
2800                                 _("Shrinking inode size is not supported\n"));
2801                         rc = 1;
2802                         goto closefs;
2803                 }
2804                 if (new_inode_size > fs->blocksize) {
2805                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2806                                 new_inode_size, fs->blocksize);
2807                         rc = 1;
2808                         goto closefs;
2809                 }
2810                 check_fsck_needed(fs,
2811                         _("Resizing inodes could take some time."));
2812                 /*
2813                  * If inode resize is requested use the
2814                  * Undo I/O manager
2815                  */
2816                 undo_file = default_undo_file;
2817         }
2818
2819         /* Set up an undo file */
2820         if (undo_file && io_ptr_orig == NULL) {
2821                 io_ptr_orig = io_ptr;
2822                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2823                 if (retval) {
2824                         rc = 1;
2825                         goto closefs;
2826                 }
2827                 if (io_ptr != io_ptr_orig) {
2828                         ext2fs_close_free(&fs);
2829                         goto retry_open;
2830                 }
2831         }
2832
2833         sb = fs->super;
2834         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2835
2836         if (print_label) {
2837                 /* For e2label emulation */
2838                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2839                        sb->s_volume_name);
2840                 remove_error_table(&et_ext2_error_table);
2841                 goto closefs;
2842         }
2843
2844         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2845         if (retval) {
2846                 com_err("ext2fs_check_if_mount", retval,
2847                         _("while determining whether %s is mounted."),
2848                         device_name);
2849                 rc = 1;
2850                 goto closefs;
2851         }
2852         /* Normally we only need to write out the superblock */
2853         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2854
2855         if (c_flag) {
2856                 sb->s_max_mnt_count = max_mount_count;
2857                 ext2fs_mark_super_dirty(fs);
2858                 printf(_("Setting maximal mount count to %d\n"),
2859                        max_mount_count);
2860         }
2861         if (C_flag) {
2862                 sb->s_mnt_count = mount_count;
2863                 ext2fs_mark_super_dirty(fs);
2864                 printf(_("Setting current mount count to %d\n"), mount_count);
2865         }
2866         if (e_flag) {
2867                 sb->s_errors = errors;
2868                 ext2fs_mark_super_dirty(fs);
2869                 printf(_("Setting error behavior to %d\n"), errors);
2870         }
2871         if (g_flag) {
2872                 sb->s_def_resgid = resgid;
2873                 ext2fs_mark_super_dirty(fs);
2874                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2875         }
2876         if (i_flag) {
2877                 if ((unsigned long long)interval >= (1ULL << 32)) {
2878                         com_err(program_name, 0,
2879                                 _("interval between checks is too big (%lu)"),
2880                                 interval);
2881                         rc = 1;
2882                         goto closefs;
2883                 }
2884                 sb->s_checkinterval = interval;
2885                 ext2fs_mark_super_dirty(fs);
2886                 printf(_("Setting interval between checks to %lu seconds\n"),
2887                        interval);
2888         }
2889         if (m_flag) {
2890                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2891                                           ext2fs_blocks_count(sb) / 100.0);
2892                 ext2fs_mark_super_dirty(fs);
2893                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2894                         reserved_ratio, ext2fs_r_blocks_count(sb));
2895         }
2896         if (r_flag) {
2897                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2898                         com_err(program_name, 0,
2899                                 _("reserved blocks count is too big (%llu)"),
2900                                 reserved_blocks);
2901                         rc = 1;
2902                         goto closefs;
2903                 }
2904                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2905                 ext2fs_mark_super_dirty(fs);
2906                 printf(_("Setting reserved blocks count to %llu\n"),
2907                        reserved_blocks);
2908         }
2909         if (s_flag == 1) {
2910                 if (ext2fs_has_feature_sparse_super(sb)) {
2911                         fputs(_("\nThe filesystem already has sparse "
2912                                 "superblocks.\n"), stderr);
2913                 } else if (ext2fs_has_feature_meta_bg(sb)) {
2914                         fputs(_("\nSetting the sparse superblock flag not "
2915                                 "supported\nfor filesystems with "
2916                                 "the meta_bg feature enabled.\n"),
2917                                 stderr);
2918                         rc = 1;
2919                         goto closefs;
2920                 } else {
2921                         ext2fs_set_feature_sparse_super(sb);
2922                         sb->s_state &= ~EXT2_VALID_FS;
2923                         ext2fs_mark_super_dirty(fs);
2924                         printf(_("\nSparse superblock flag set.  %s"),
2925                                _(please_fsck));
2926                 }
2927         }
2928         if (s_flag == 0) {
2929                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2930                       stderr);
2931                 rc = 1;
2932                 goto closefs;
2933         }
2934         if (T_flag) {
2935                 sb->s_lastcheck = last_check_time;
2936                 ext2fs_mark_super_dirty(fs);
2937                 printf(_("Setting time filesystem last checked to %s\n"),
2938                        ctime(&last_check_time));
2939         }
2940         if (u_flag) {
2941                 sb->s_def_resuid = resuid;
2942                 ext2fs_mark_super_dirty(fs);
2943                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
2944         }
2945         if (L_flag) {
2946                 if (strlen(new_label) > sizeof(sb->s_volume_name))
2947                         fputs(_("Warning: label too long, truncating.\n"),
2948                               stderr);
2949                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
2950                 strncpy(sb->s_volume_name, new_label,
2951                         sizeof(sb->s_volume_name));
2952                 ext2fs_mark_super_dirty(fs);
2953         }
2954         if (M_flag) {
2955                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
2956                 strncpy(sb->s_last_mounted, new_last_mounted,
2957                         sizeof(sb->s_last_mounted));
2958                 ext2fs_mark_super_dirty(fs);
2959         }
2960         if (mntopts_cmd) {
2961                 rc = update_mntopts(fs, mntopts_cmd);
2962                 if (rc)
2963                         goto closefs;
2964         }
2965         if (features_cmd) {
2966                 rc = update_feature_set(fs, features_cmd);
2967                 if (rc)
2968                         goto closefs;
2969         }
2970         if (extended_cmd) {
2971                 rc = parse_extended_opts(fs, extended_cmd);
2972                 if (rc)
2973                         goto closefs;
2974                 if (clear_mmp && !f_flag) {
2975                         fputs(_("Error in using clear_mmp. "
2976                                 "It must be used with -f\n"),
2977                               stderr);
2978                         goto closefs;
2979                 }
2980         }
2981         if (clear_mmp) {
2982                 rc = ext2fs_mmp_clear(fs);
2983                 goto closefs;
2984         }
2985         if (journal_size || journal_device) {
2986                 rc = add_journal(fs);
2987                 if (rc)
2988                         goto closefs;
2989         }
2990
2991         if (Q_flag) {
2992                 if (mount_flags & EXT2_MF_MOUNTED) {
2993                         fputs(_("The quota feature may only be changed when "
2994                                 "the filesystem is unmounted.\n"), stderr);
2995                         rc = 1;
2996                         goto closefs;
2997                 }
2998                 handle_quota_options(fs);
2999         }
3000
3001         if (U_flag) {
3002                 int set_csum = 0;
3003                 dgrp_t i;
3004                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3005                 __u8 old_uuid[UUID_SIZE];
3006
3007                 if (ext2fs_has_group_desc_csum(fs)) {
3008                         /*
3009                          * Changing the UUID on a metadata_csum FS requires
3010                          * rewriting all metadata, which can race with a
3011                          * mounted fs.  Don't allow that unless we're saving
3012                          * the checksum seed.
3013                          */
3014                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3015                             !ext2fs_has_feature_csum_seed(fs->super) &&
3016                             ext2fs_has_feature_metadata_csum(fs->super)) {
3017                                 fputs(_("The UUID may only be "
3018                                         "changed when the filesystem is "
3019                                         "unmounted.\n"), stderr);
3020                                 fputs(_("If you only use kernels newer than "
3021                                         "v4.4, run 'tune2fs -O "
3022                                         "metadata_csum_seed' and re-run this "
3023                                         "command.\n"), stderr);
3024                                 try_confirm_csum_seed_support();
3025                                 exit(1);
3026                         }
3027                         if (!ext2fs_has_feature_csum_seed(fs->super))
3028                                 check_fsck_needed(fs,
3029                                         _("Setting UUID on a checksummed "
3030                                           "filesystem could take some time."));
3031
3032                         /*
3033                          * Determine if the block group checksums are
3034                          * correct so we know whether or not to set
3035                          * them later on.
3036                          */
3037                         for (i = 0; i < fs->group_desc_count; i++)
3038                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3039                                         break;
3040                         if (i >= fs->group_desc_count)
3041                                 set_csum = 1;
3042                 }
3043
3044                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3045                 if ((strcasecmp(new_UUID, "null") == 0) ||
3046                     (strcasecmp(new_UUID, "clear") == 0)) {
3047                         uuid_clear(sb->s_uuid);
3048                 } else if (strcasecmp(new_UUID, "time") == 0) {
3049                         uuid_generate_time(sb->s_uuid);
3050                 } else if (strcasecmp(new_UUID, "random") == 0) {
3051                         uuid_generate(sb->s_uuid);
3052                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3053                         com_err(program_name, 0, "%s",
3054                                 _("Invalid UUID format\n"));
3055                         rc = 1;
3056                         goto closefs;
3057                 }
3058                 ext2fs_init_csum_seed(fs);
3059                 if (set_csum) {
3060                         for (i = 0; i < fs->group_desc_count; i++)
3061                                 ext2fs_group_desc_csum_set(fs, i);
3062                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3063                 }
3064
3065                 /* If this is a journal dev, we need to copy UUID into jsb */
3066                 if (!(rc = get_journal_sb(fs, buf))) {
3067                         journal_superblock_t *jsb;
3068
3069                         jsb = (journal_superblock_t *) buf;
3070                         fputs(_("Need to update journal superblock.\n"), stdout);
3071                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3072
3073                         /* Writeback the journal superblock */
3074                         if ((rc = io_channel_write_blk64(fs->io,
3075                                 ext2fs_journal_sb_start(fs->blocksize),
3076                                         -SUPERBLOCK_SIZE, buf)))
3077                                 goto closefs;
3078                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3079                         goto closefs;
3080                 else {
3081                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3082
3083                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3084                                 goto closefs;
3085                 }
3086
3087                 ext2fs_mark_super_dirty(fs);
3088                 if (ext2fs_has_feature_metadata_csum(fs->super) &&
3089                     !ext2fs_has_feature_csum_seed(fs->super))
3090                         rewrite_checksums = 1;
3091         }
3092
3093         if (I_flag) {
3094                 if (mount_flags & EXT2_MF_MOUNTED) {
3095                         fputs(_("The inode size may only be "
3096                                 "changed when the filesystem is "
3097                                 "unmounted.\n"), stderr);
3098                         rc = 1;
3099                         goto closefs;
3100                 }
3101                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3102                         fputs(_("Changing the inode size not supported for "
3103                                 "filesystems with the flex_bg\n"
3104                                 "feature enabled.\n"),
3105                               stderr);
3106                         rc = 1;
3107                         goto closefs;
3108                 }
3109                 /*
3110                  * We want to update group descriptor also
3111                  * with the new free inode count
3112                  */
3113                 if (rewrite_checksums)
3114                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3115                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3116                 retval = resize_inode(fs, new_inode_size);
3117                 if (rewrite_checksums)
3118                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3119                 if (retval == 0) {
3120                         printf(_("Setting inode size %lu\n"),
3121                                                         new_inode_size);
3122                         rewrite_checksums = 1;
3123                 } else {
3124                         printf("%s", _("Failed to change inode size\n"));
3125                         rc = 1;
3126                         goto closefs;
3127                 }
3128         }
3129
3130         if (rewrite_checksums)
3131                 rewrite_metadata_checksums(fs);
3132
3133         if (l_flag)
3134                 list_super(sb);
3135         if (stride_set) {
3136                 sb->s_raid_stride = stride;
3137                 ext2fs_mark_super_dirty(fs);
3138                 printf(_("Setting stride size to %d\n"), stride);
3139         }
3140         if (stripe_width_set) {
3141                 sb->s_raid_stripe_width = stripe_width;
3142                 ext2fs_mark_super_dirty(fs);
3143                 printf(_("Setting stripe width to %d\n"), stripe_width);
3144         }
3145         if (ext_mount_opts) {
3146                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3147                         sizeof(fs->super->s_mount_opts));
3148                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3149                 ext2fs_mark_super_dirty(fs);
3150                 printf(_("Setting extended default mount options to '%s'\n"),
3151                        ext_mount_opts);
3152                 free(ext_mount_opts);
3153         }
3154
3155         /* Warn if file system needs recovery and it is opened for writing. */
3156         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3157             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3158             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3159                 fprintf(stderr,
3160 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3161   "\te2fsck -E journal_only %s\n\n"
3162   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3163   "by journal recovery.\n"), device_name);
3164         }
3165
3166         free(device_name);
3167         remove_error_table(&et_ext2_error_table);
3168
3169 closefs:
3170         if (rc) {
3171                 ext2fs_mmp_stop(fs);
3172 #ifndef BUILD_AS_LIB
3173                 exit(1);
3174 #endif
3175         }
3176
3177         convert_64bit(fs, feature_64bit);
3178         return (ext2fs_close_free(&fs) ? 1 : 0);
3179 }