misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "support/devname.h"
  63 #include "uuid/uuid.h"
  64 #include "e2p/e2p.h"
  65 #include "util.h"
  66 #include "blkid/blkid.h"
  67
  68 #include "../version.h"
  69 #include "support/nls-enable.h"
  70
  71 #define QOPT_ENABLE     (1)
  72 #define QOPT_DISABLE    (-1)
  73
  74 extern int ask_yn(const char *string, int def);
  75
  76 const char *program_name = "tune2fs";
  77 char *device_name;
  78 char *new_label, *new_last_mounted, *new_UUID;
  79 char *io_options;
  80 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  81 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  82 static int I_flag;
  83 static int clear_mmp;
  84 static time_t last_check_time;
  85 static int print_label;
  86 static int max_mount_count, mount_count, mount_flags;
  87 static unsigned long interval;
  88 static blk64_t reserved_blocks;
  89 static double reserved_ratio;
  90 static unsigned long resgid, resuid;
  91 static unsigned short errors;
  92 static int open_flag;
  93 static char *features_cmd;
  94 static char *mntopts_cmd;
  95 static int stride, stripe_width;
  96 static int stride_set, stripe_width_set;
  97 static char *extended_cmd;
  98 static unsigned long new_inode_size;
  99 static char *ext_mount_opts;
 100 static int quota_enable[MAXQUOTAS];
 101 static int rewrite_checksums;
 102 static int feature_64bit;
 103 static int fsck_requested;
 104 static char *undo_file;
 105 int enabling_casefold;
 106
 107 int journal_size, journal_fc_size, journal_flags;
 108 char *journal_device;
 109 static blk64_t journal_location = ~0LL;
 110
 111 static struct list_head blk_move_list;
 112
 113 struct blk_move {
 114         struct list_head list;
 115         blk64_t old_loc;
 116         blk64_t new_loc;
 117 };
 118
 119 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 120
 121 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 122
 123 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 124 static const char *please_dir_fsck =
 125                 N_("Please run e2fsck -fD on the filesystem.\n");
 126
 127 #ifdef CONFIG_BUILD_FINDFS
 128 void do_findfs(int argc, char **argv);
 129 #endif
 130
 131 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 132 int journal_enable_debug = -1;
 133 #endif
 134
 135 static void usage(void)
 136 {
 137         fprintf(stderr,
 138                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 139                   "[-g group]\n"
 140                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 141                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 142                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 143                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 144                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 145                   "\t[-E extended-option[,...]] [-T last_check_time] "
 146                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 147                 program_name);
 148         exit(1);
 149 }
 150
 151 static __u32 ok_features[3] = {
 152         /* Compat */
 153         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 154                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 155                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 156                 EXT4_FEATURE_COMPAT_STABLE_INODES,
 157         /* Incompat */
 158         EXT2_FEATURE_INCOMPAT_FILETYPE |
 159                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 160                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 161                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 162                 EXT4_FEATURE_INCOMPAT_MMP |
 163                 EXT4_FEATURE_INCOMPAT_64BIT |
 164                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 165                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 166                 EXT4_FEATURE_INCOMPAT_LARGEDIR |
 167                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 168         /* R/O compat */
 169         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 170                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 171                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 172                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 173                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 174                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 175                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 176                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 177                 EXT4_FEATURE_RO_COMPAT_READONLY |
 178                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 179                 EXT4_FEATURE_RO_COMPAT_VERITY
 180 };
 181
 182 static __u32 clear_ok_features[3] = {
 183         /* Compat */
 184         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 185                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 186                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 187                 EXT4_FEATURE_COMPAT_FAST_COMMIT,
 188         /* Incompat */
 189         EXT2_FEATURE_INCOMPAT_FILETYPE |
 190                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 191                 EXT4_FEATURE_INCOMPAT_MMP |
 192                 EXT4_FEATURE_INCOMPAT_64BIT |
 193                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 194         /* R/O compat */
 195         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 196                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 197                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 198                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 199                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 200                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 201                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 202                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 203                 EXT4_FEATURE_RO_COMPAT_READONLY
 204 };
 205
 206 /**
 207  * Try to get journal super block if any
 208  */
 209 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 210 {
 211         int retval;
 212         journal_superblock_t *jsb;
 213
 214         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 215                 return EXT2_ET_UNSUPP_FEATURE;
 216         }
 217
 218         /* Get the journal superblock */
 219         if ((retval = io_channel_read_blk64(jfs->io,
 220             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 221                 com_err(program_name, retval, "%s",
 222                 _("while reading journal superblock"));
 223                 return retval;
 224         }
 225
 226         jsb = (journal_superblock_t *) buf;
 227         if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
 228             (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
 229                 fputs(_("Journal superblock not found!\n"), stderr);
 230                 return EXT2_ET_BAD_MAGIC;
 231         }
 232
 233         return 0;
 234 }
 235
 236 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
 237                           int nr_users)
 238 {
 239         int i;
 240         for (i = 0; i < nr_users; i++) {
 241                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 242                         return &s_users[i * UUID_SIZE];
 243         }
 244
 245         return NULL;
 246 }
 247
 248 /*
 249  * Remove an external journal from the filesystem
 250  */
 251 static int remove_journal_device(ext2_filsys fs)
 252 {
 253         char            *journal_path;
 254         ext2_filsys     jfs;
 255         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 256         journal_superblock_t    *jsb;
 257         int             i, nr_users;
 258         errcode_t       retval;
 259         int             commit_remove_journal = 0;
 260         io_manager      io_ptr;
 261
 262         if (f_flag)
 263                 commit_remove_journal = 1; /* force removal even if error */
 264
 265         uuid_unparse(fs->super->s_journal_uuid, buf);
 266         journal_path = blkid_get_devname(NULL, "UUID", buf);
 267
 268         if (!journal_path) {
 269                 journal_path =
 270                         ext2fs_find_block_device(fs->super->s_journal_dev);
 271                 if (!journal_path)
 272                         goto no_valid_journal;
 273         }
 274
 275 #ifdef CONFIG_TESTIO_DEBUG
 276         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 277                 io_ptr = test_io_manager;
 278                 test_io_backing_manager = unix_io_manager;
 279         } else
 280 #endif
 281                 io_ptr = unix_io_manager;
 282         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 283                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 284                              fs->blocksize, io_ptr, &jfs);
 285         if (retval) {
 286                 com_err(program_name, retval, "%s",
 287                         _("while trying to open external journal"));
 288                 goto no_valid_journal;
 289         }
 290
 291         if ((retval = get_journal_sb(jfs, buf))) {
 292                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 293                         fprintf(stderr, _("%s is not a journal device.\n"),
 294                                 journal_path);
 295                 goto no_valid_journal;
 296         }
 297
 298         jsb = (journal_superblock_t *) buf;
 299         /* Find the filesystem UUID */
 300         nr_users = ntohl(jsb->s_nr_users);
 301         if (nr_users > JBD2_USERS_MAX) {
 302                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 303                                  "is too high (%d).\n"), nr_users);
 304                 commit_remove_journal = 1;
 305                 goto no_valid_journal;
 306         }
 307
 308         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 309                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 310                       stderr);
 311                 commit_remove_journal = 1;
 312                 goto no_valid_journal;
 313         }
 314         nr_users--;
 315         for (i = 0; i < nr_users; i++)
 316                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 317         jsb->s_nr_users = htonl(nr_users);
 318
 319         /* Write back the journal superblock */
 320         retval = io_channel_write_blk64(jfs->io,
 321                                         ext2fs_journal_sb_start(fs->blocksize),
 322                                         -SUPERBLOCK_SIZE, buf);
 323         if (retval) {
 324                 com_err(program_name, retval,
 325                         "while writing journal superblock.");
 326                 goto no_valid_journal;
 327         }
 328
 329         commit_remove_journal = 1;
 330
 331 no_valid_journal:
 332         if (commit_remove_journal == 0) {
 333                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 334                         "Use -f option to remove missing journal device.\n"),
 335                       stderr);
 336                 return 1;
 337         }
 338         fs->super->s_journal_dev = 0;
 339         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 340         uuid_clear(fs->super->s_journal_uuid);
 341         ext2fs_mark_super_dirty(fs);
 342         fputs(_("Journal removed\n"), stdout);
 343         free(journal_path);
 344
 345         return 0;
 346 }
 347
 348 /* Helper function for remove_journal_inode */
 349 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 350                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 351                                blk64_t ref_block EXT2FS_ATTR((unused)),
 352                                int ref_offset EXT2FS_ATTR((unused)),
 353                                void *private EXT2FS_ATTR((unused)))
 354 {
 355         blk64_t block;
 356         int     group;
 357
 358         block = *blocknr;
 359         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 360         group = ext2fs_group_of_blk2(fs, block);
 361         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 362         ext2fs_group_desc_csum_set(fs, group);
 363         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 364         return 0;
 365 }
 366
 367 /*
 368  * Remove the journal inode from the filesystem
 369  */
 370 static errcode_t remove_journal_inode(ext2_filsys fs)
 371 {
 372         struct ext2_inode       inode;
 373         errcode_t               retval;
 374         ext2_ino_t              ino = fs->super->s_journal_inum;
 375
 376         retval = ext2fs_read_inode(fs, ino,  &inode);
 377         if (retval) {
 378                 com_err(program_name, retval, "%s",
 379                         _("while reading journal inode"));
 380                 return retval;
 381         }
 382         if (ino == EXT2_JOURNAL_INO) {
 383                 retval = ext2fs_read_bitmaps(fs);
 384                 if (retval) {
 385                         com_err(program_name, retval, "%s",
 386                                 _("while reading bitmaps"));
 387                         return retval;
 388                 }
 389                 retval = ext2fs_block_iterate3(fs, ino,
 390                                                BLOCK_FLAG_READ_ONLY, NULL,
 391                                                release_blocks_proc, NULL);
 392                 if (retval) {
 393                         com_err(program_name, retval, "%s",
 394                                 _("while clearing journal inode"));
 395                         return retval;
 396                 }
 397                 fs->super->s_overhead_clusters -=
 398                         EXT2FS_NUM_B2C(fs, EXT2_I_SIZE(&inode) / fs->blocksize);
 399                 memset(&inode, 0, sizeof(inode));
 400                 ext2fs_mark_bb_dirty(fs);
 401                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 402         } else
 403                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 404         retval = ext2fs_write_inode(fs, ino, &inode);
 405         if (retval) {
 406                 com_err(program_name, retval, "%s",
 407                         _("while writing journal inode"));
 408                 return retval;
 409         }
 410         fs->super->s_journal_inum = 0;
 411         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 412         ext2fs_mark_super_dirty(fs);
 413
 414         return 0;
 415 }
 416
 417 /*
 418  * Update the default mount options
 419  */
 420 static int update_mntopts(ext2_filsys fs, char *mntopts)
 421 {
 422         struct ext2_super_block *sb = fs->super;
 423
 424         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 425                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 426                         mntopts);
 427                 return 1;
 428         }
 429         ext2fs_mark_super_dirty(fs);
 430
 431         return 0;
 432 }
 433
 434 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 435 {
 436         /* Refuse to modify anything but a freshly checked valid filesystem. */
 437         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 438             (fs->super->s_state & EXT2_ERROR_FS) ||
 439             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 440                 puts(_(fsck_explain));
 441                 puts(_(please_fsck));
 442                 if (mount_flags & EXT2_MF_READONLY)
 443                         printf("%s", _("(and reboot afterwards!)\n"));
 444                 return 1;
 445         }
 446
 447         /* Give the admin a few seconds to bail out of a dangerous op. */
 448         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 449                 return 0;
 450
 451         puts(prompt);
 452         proceed_question(5);
 453
 454         return 0;
 455 }
 456
 457 static void request_dir_fsck_afterwards(ext2_filsys fs)
 458 {
 459         static int requested;
 460
 461         if (requested++)
 462                 return;
 463         fsck_requested++;
 464         fs->super->s_state &= ~EXT2_VALID_FS;
 465         puts(_(fsck_explain));
 466         puts(_(please_dir_fsck));
 467         if (mount_flags & EXT2_MF_READONLY)
 468                 printf("%s", _("(and reboot afterwards!)\n"));
 469 }
 470
 471 static void request_fsck_afterwards(ext2_filsys fs)
 472 {
 473         static int requested = 0;
 474
 475         if (requested++)
 476                 return;
 477         fsck_requested++;
 478         fs->super->s_state &= ~EXT2_VALID_FS;
 479         printf("\n%s\n", _(please_fsck));
 480         if (mount_flags & EXT2_MF_READONLY)
 481                 printf("%s", _("(and reboot afterwards!)\n"));
 482 }
 483
 484 static void convert_64bit(ext2_filsys fs, int direction)
 485 {
 486         /*
 487          * Is resize2fs going to demand a fsck run? Might as well tell the
 488          * user now.
 489          */
 490         if (!fsck_requested &&
 491             ((fs->super->s_state & EXT2_ERROR_FS) ||
 492              !(fs->super->s_state & EXT2_VALID_FS) ||
 493              fs->super->s_lastcheck < fs->super->s_mtime))
 494                 request_fsck_afterwards(fs);
 495         if (fsck_requested)
 496                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 497                         direction > 0 ? "-b" : "-s", fs->device_name);
 498         else
 499                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 500                         direction > 0 ? "-b" : "-s", fs->device_name);
 501
 502         if (undo_file)
 503                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 504         if (direction > 0)
 505                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 506         else
 507                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 508 }
 509
 510 /*
 511  * Rewrite directory blocks with checksums
 512  */
 513 struct rewrite_dir_context {
 514         char *buf;
 515         errcode_t errcode;
 516         ext2_ino_t dir;
 517         int is_htree:1;
 518         int clear_htree:1;
 519 };
 520
 521 static int rewrite_dir_block(ext2_filsys fs,
 522                              blk64_t    *blocknr,
 523                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 524                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 525                              int        ref_offset EXT2FS_ATTR((unused)),
 526                              void       *priv_data)
 527 {
 528         struct ext2_dx_countlimit *dcl = NULL;
 529         struct rewrite_dir_context *ctx = priv_data;
 530         int dcl_offset, changed = 0;
 531
 532         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 533                                               ctx->dir);
 534         if (ctx->errcode)
 535                 return BLOCK_ABORT;
 536
 537         /*
 538          * if htree node... Note that if we are clearing htree structures from
 539          * the directory, we treat the htree internal block as an ordinary leaf.
 540          * The code below will do the right thing and make space for checksum
 541          * there.
 542          */
 543         if (ctx->is_htree && !ctx->clear_htree)
 544                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 545                                          &dcl, &dcl_offset);
 546         if (dcl) {
 547                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 548                         /* Ensure limit is the max size */
 549                         int max_entries = (fs->blocksize - dcl_offset) /
 550                                           sizeof(struct ext2_dx_entry);
 551                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 552                                 changed = 1;
 553                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 554                         }
 555                 } else {
 556                         /* If htree block is full then rebuild the dir */
 557                         if (ext2fs_le16_to_cpu(dcl->count) ==
 558                             ext2fs_le16_to_cpu(dcl->limit)) {
 559                                 request_dir_fsck_afterwards(fs);
 560                                 return 0;
 561                         }
 562                         /*
 563                          * Ensure dcl->limit is small enough to leave room for
 564                          * the checksum tail.
 565                          */
 566                         int max_entries = (fs->blocksize - (dcl_offset +
 567                                                 sizeof(struct ext2_dx_tail))) /
 568                                           sizeof(struct ext2_dx_entry);
 569                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 570                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 571                         /* Always rewrite checksum */
 572                         changed = 1;
 573                 }
 574         } else {
 575                 unsigned int rec_len, name_size;
 576                 char *top = ctx->buf + fs->blocksize;
 577                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 578                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 579
 580                 /* Find last and penultimate dirent */
 581                 while ((char *)de < top) {
 582                         penultimate_de = last_de;
 583                         last_de = de;
 584                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 585                         if (!ctx->errcode && !rec_len)
 586                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 587                         if (ctx->errcode)
 588                                 return BLOCK_ABORT;
 589                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 590                 }
 591                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 592                 if (ctx->errcode)
 593                         return BLOCK_ABORT;
 594                 name_size = ext2fs_dirent_name_len(last_de);
 595
 596                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 597                         if (!penultimate_de)
 598                                 return 0;
 599                         if (last_de->inode ||
 600                             name_size ||
 601                             rec_len != sizeof(struct ext2_dir_entry_tail))
 602                                 return 0;
 603                         /*
 604                          * The last dirent is unused and the right length to
 605                          * have stored a checksum.  Erase it.
 606                          */
 607                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 608                                                           &rec_len);
 609                         if (!rec_len)
 610                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 611                         if (ctx->errcode)
 612                                 return BLOCK_ABORT;
 613                         ext2fs_set_rec_len(fs, rec_len +
 614                                         sizeof(struct ext2_dir_entry_tail),
 615                                         penultimate_de);
 616                         changed = 1;
 617                 } else {
 618                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 619                         struct ext2_dir_entry_tail *t;
 620
 621                         /*
 622                          * If the last dirent looks like the tail, just update
 623                          * the checksum.
 624                          */
 625                         if (!last_de->inode &&
 626                             rec_len == csum_size) {
 627                                 t = (struct ext2_dir_entry_tail *)last_de;
 628                                 t->det_reserved_name_len =
 629                                                 EXT2_DIR_NAME_LEN_CSUM;
 630                                 changed = 1;
 631                                 goto out;
 632                         }
 633                         if (name_size & 3)
 634                                 name_size = (name_size & ~3) + 4;
 635                         /* If there's not enough space for the tail, e2fsck */
 636                         if (rec_len <= (8 + name_size + csum_size)) {
 637                                 request_dir_fsck_afterwards(fs);
 638                                 return 0;
 639                         }
 640                         /* Shorten that last de and insert the tail */
 641                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 642                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 643                         ext2fs_initialize_dirent_tail(fs, t);
 644
 645                         /* Always update checksum */
 646                         changed = 1;
 647                 }
 648         }
 649
 650 out:
 651         if (!changed)
 652                 return 0;
 653
 654         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 655                                                0, ctx->dir);
 656         if (ctx->errcode)
 657                 return BLOCK_ABORT;
 658
 659         return 0;
 660 }
 661
 662 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 663                                    struct ext2_inode *inode)
 664 {
 665         errcode_t       retval;
 666         struct rewrite_dir_context ctx;
 667
 668         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 669         if (retval)
 670                 return retval;
 671
 672         ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
 673         ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
 674         ctx.dir = dir;
 675         ctx.errcode = 0;
 676         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 677                                                 BLOCK_FLAG_DATA_ONLY,
 678                                        0, rewrite_dir_block, &ctx);
 679
 680         ext2fs_free_mem(&ctx.buf);
 681         if (retval)
 682                 return retval;
 683
 684         if (ctx.is_htree && ctx.clear_htree) {
 685                 inode->i_flags &= ~EXT2_INDEX_FL;
 686                 retval = ext2fs_write_inode(fs, dir, inode);
 687                 if (retval)
 688                         return retval;
 689         }
 690
 691         return ctx.errcode;
 692 }
 693
 694 /*
 695  * Context information that does not change across rewrite_one_inode()
 696  * invocations.
 697  */
 698 struct rewrite_context {
 699         ext2_filsys fs;
 700         struct ext2_inode *zero_inode;
 701         char *ea_buf;
 702         int inode_size;
 703 };
 704
 705 #define fatal_err(code, args...)                \
 706         do {                                    \
 707                 com_err(__func__, code, args);  \
 708                 exit(1);                        \
 709         } while (0);
 710
 711 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 712                                  struct ext2_inode *inode)
 713 {
 714         errcode_t retval;
 715         ext2_file_t file;
 716         __u32 hash;
 717
 718         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 719         if (retval)
 720                 fatal_err(retval, "open ea_inode");
 721         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 722                                   NULL);
 723         if (retval)
 724                 fatal_err(retval, "read ea_inode");
 725         retval = ext2fs_file_close(file);
 726         if (retval)
 727                 fatal_err(retval, "close ea_inode");
 728
 729         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 730                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 731         ext2fs_set_ea_inode_hash(inode, hash);
 732 }
 733
 734 static int update_xattr_entry_hashes(ext2_filsys fs,
 735                                      struct ext2_ext_attr_entry *entry,
 736                                      struct ext2_ext_attr_entry *end)
 737 {
 738         int modified = 0;
 739         errcode_t retval;
 740
 741         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 742                 if (entry->e_value_inum) {
 743                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 744                                                              &entry->e_hash);
 745                         if (retval)
 746                                 fatal_err(retval, "hash ea_inode entry");
 747                         modified = 1;
 748                 }
 749                 entry = EXT2_EXT_ATTR_NEXT(entry);
 750         }
 751         return modified;
 752 }
 753
 754 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 755                                        struct ext2_inode_large *inode)
 756 {
 757         struct ext2_ext_attr_entry *start, *end;
 758         __u32 *ea_magic;
 759
 760         if (inode->i_extra_isize == 0)
 761                 return;
 762
 763         if (inode->i_extra_isize & 3 ||
 764             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 765                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 766
 767         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 768                                 inode->i_extra_isize);
 769         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 770                 return;
 771
 772         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 773         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 774
 775         update_xattr_entry_hashes(ctx->fs, start, end);
 776 }
 777
 778 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 779                                       char *block_buf)
 780 {
 781         struct ext2_ext_attr_header *header;
 782         struct ext2_ext_attr_entry *start, *end;
 783
 784         header = (struct ext2_ext_attr_header *)block_buf;
 785         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 786                 return;
 787
 788         start = (struct ext2_ext_attr_entry *)(header+1);
 789         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 790
 791         if (update_xattr_entry_hashes(ctx->fs, start, end))
 792                 ext2fs_ext_attr_block_rehash(header, end);
 793 }
 794
 795 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 796                               struct ext2_inode *inode)
 797 {
 798         blk64_t file_acl_block;
 799         errcode_t retval;
 800
 801         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 802                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 803                         return;
 804                 memset(inode, 0, ctx->inode_size);
 805         }
 806
 807         if (inode->i_flags & EXT4_EA_INODE_FL)
 808                 update_ea_inode_hash(ctx, ino, inode);
 809
 810         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 811                 update_inline_xattr_hashes(ctx,
 812                                            (struct ext2_inode_large *)inode);
 813
 814         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 815         if (retval)
 816                 fatal_err(retval, "while writing inode");
 817
 818         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 819         if (retval)
 820                 fatal_err(retval, "while rewriting extents");
 821
 822         if (LINUX_S_ISDIR(inode->i_mode) &&
 823             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 824                 retval = rewrite_directory(ctx->fs, ino, inode);
 825                 if (retval)
 826                         fatal_err(retval, "while rewriting directories");
 827         }
 828
 829         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 830         if (!file_acl_block)
 831                 return;
 832
 833         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 834                                        ino);
 835         if (retval)
 836                 fatal_err(retval, "while rewriting extended attribute");
 837
 838         update_block_xattr_hashes(ctx, ctx->ea_buf);
 839         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 840                                         ino);
 841         if (retval)
 842                 fatal_err(retval, "while rewriting extended attribute");
 843 }
 844
 845 #define REWRITE_EA_FL           0x01    /* Rewrite EA inodes */
 846 #define REWRITE_DIR_FL          0x02    /* Rewrite directories */
 847 #define REWRITE_NONDIR_FL       0x04    /* Rewrite other inodes */
 848 #define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
 849
 850 static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
 851 {
 852         ext2_inode_scan scan;
 853         errcode_t       retval;
 854         ext2_ino_t      ino;
 855         struct ext2_inode *inode;
 856         int rewrite;
 857
 858         retval = ext2fs_get_mem(ctx->inode_size, &inode);
 859         if (retval)
 860                 fatal_err(retval, "while allocating memory");
 861
 862         retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
 863         if (retval)
 864                 fatal_err(retval, "while opening inode scan");
 865
 866         do {
 867                 retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 868                                                     ctx->inode_size);
 869                 if (retval)
 870                         fatal_err(retval, "while getting next inode");
 871                 if (!ino)
 872                         break;
 873
 874                 rewrite = 0;
 875                 if (inode->i_flags & EXT4_EA_INODE_FL) {
 876                         if (flags & REWRITE_EA_FL)
 877                                 rewrite = 1;
 878                 } else if (LINUX_S_ISDIR(inode->i_mode)) {
 879                         if (flags & REWRITE_DIR_FL)
 880                                 rewrite = 1;
 881                 } else {
 882                         if (flags & REWRITE_NONDIR_FL)
 883                                 rewrite = 1;
 884                 }
 885                 if (rewrite)
 886                         rewrite_one_inode(ctx, ino, inode);
 887         } while (ino);
 888         ext2fs_close_inode_scan(scan);
 889         ext2fs_free_mem(&inode);
 890 }
 891
 892 /*
 893  * Forcibly rewrite checksums in inodes specified by 'flags'
 894  */
 895 static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
 896 {
 897         struct rewrite_context ctx = {
 898                 .fs = fs,
 899                 .inode_size = EXT2_INODE_SIZE(fs->super),
 900         };
 901         errcode_t retval;
 902
 903         if (fs->super->s_creator_os == EXT2_OS_HURD)
 904                 return;
 905
 906         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 907         if (retval)
 908                 fatal_err(retval, "while allocating memory");
 909
 910         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 911         if (retval)
 912                 fatal_err(retval, "while allocating memory");
 913
 914         /*
 915          * Extended attribute inodes have a lookup hash that needs to be
 916          * recalculated with the new csum_seed. Other inodes referencing xattr
 917          * inodes need this value to be up to date. That's why we do two passes:
 918          *
 919          * pass 1: update xattr inodes to update their lookup hash as well as
 920          *         other checksums.
 921          *
 922          * pass 2: go over other inodes to update their checksums.
 923          */
 924         if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
 925                 rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
 926         flags &= ~REWRITE_EA_FL;
 927         rewrite_inodes_pass(&ctx, flags);
 928
 929         ext2fs_free_mem(&ctx.zero_inode);
 930         ext2fs_free_mem(&ctx.ea_buf);
 931 }
 932
 933 static errcode_t rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 934 {
 935         errcode_t retval;
 936         dgrp_t i;
 937
 938         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 939         ext2fs_init_csum_seed(fs);
 940         for (i = 0; i < fs->group_desc_count; i++)
 941                 ext2fs_group_desc_csum_set(fs, i);
 942         retval = ext2fs_read_bitmaps(fs);
 943         if (retval)
 944                 fatal_err(retval, "while reading bitmaps");
 945         rewrite_inodes(fs, flags);
 946         ext2fs_mark_ib_dirty(fs);
 947         ext2fs_mark_bb_dirty(fs);
 948         retval = ext2fs_mmp_update2(fs, 1);
 949         if (retval)
 950                 return retval;
 951         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 952         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 953         if (ext2fs_has_feature_metadata_csum(fs->super))
 954                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 955         else
 956                 fs->super->s_checksum_type = 0;
 957         ext2fs_mark_super_dirty(fs);
 958         return 0;
 959 }
 960
 961 static void enable_uninit_bg(ext2_filsys fs)
 962 {
 963         struct ext2_group_desc *gd;
 964         dgrp_t i;
 965
 966         for (i = 0; i < fs->group_desc_count; i++) {
 967                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 968                 gd->bg_itable_unused = 0;
 969                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 970                 ext2fs_group_desc_csum_set(fs, i);
 971         }
 972         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 973 }
 974
 975 static errcode_t zero_empty_inodes(ext2_filsys fs)
 976 {
 977         int length = EXT2_INODE_SIZE(fs->super);
 978         struct ext2_inode *inode = NULL;
 979         ext2_inode_scan scan;
 980         errcode_t       retval;
 981         ext2_ino_t      ino;
 982
 983         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 984         if (retval)
 985                 goto out;
 986
 987         retval = ext2fs_get_mem(length, &inode);
 988         if (retval)
 989                 goto out;
 990
 991         do {
 992                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 993                 if (retval)
 994                         goto out;
 995                 if (!ino)
 996                         break;
 997                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 998                         memset(inode, 0, length);
 999                         retval = ext2fs_write_inode_full(fs, ino, inode,
1000                                                          length);
1001                         if (retval)
1002                                 goto out;
1003                 }
1004         } while (1);
1005
1006 out:
1007         ext2fs_free_mem(&inode);
1008         ext2fs_close_inode_scan(scan);
1009         return retval;
1010 }
1011
1012 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1013 {
1014         struct ext2_group_desc *gd;
1015         dgrp_t i;
1016         errcode_t retval;
1017         blk64_t b, c, d;
1018
1019         /* Load bitmaps to ensure that the uninit ones get written out */
1020         fs->super->s_feature_ro_compat |= csum_feature_flag;
1021         retval = ext2fs_read_bitmaps(fs);
1022         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1023         if (retval) {
1024                 com_err("disable_uninit_bg", retval,
1025                         "while reading bitmaps");
1026                 request_fsck_afterwards(fs);
1027                 return retval;
1028         }
1029         ext2fs_mark_ib_dirty(fs);
1030         ext2fs_mark_bb_dirty(fs);
1031
1032         /* If we're only turning off uninit_bg, zero the inodes */
1033         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1034                 retval = zero_empty_inodes(fs);
1035                 if (retval) {
1036                         com_err("disable_uninit_bg", retval,
1037                                 "while zeroing unused inodes");
1038                         request_fsck_afterwards(fs);
1039                         return retval;
1040                 }
1041         }
1042
1043         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1044         for (i = 0; i < fs->group_desc_count; i++) {
1045                 b = ext2fs_block_bitmap_loc(fs, i);
1046                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1047                 b = ext2fs_inode_bitmap_loc(fs, i);
1048                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1049
1050                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1051                 if (retval == 0 && b)
1052                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1053                 if (retval == 0 && c)
1054                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1055                 if (retval == 0 && d)
1056                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1057                 if (retval) {
1058                         com_err("disable_uninit_bg", retval,
1059                                 "while initializing block bitmaps");
1060                         request_fsck_afterwards(fs);
1061                 }
1062
1063                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1064                 gd->bg_itable_unused = 0;
1065                 gd->bg_flags = 0;
1066                 ext2fs_group_desc_csum_set(fs, i);
1067         }
1068         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1069         ext2fs_mark_super_dirty(fs);
1070
1071         return 0;
1072 }
1073
1074 static void
1075 try_confirm_csum_seed_support(void)
1076 {
1077         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1078                 fputs(_("WARNING: Could not confirm kernel support for "
1079                         "metadata_csum_seed.\n  This requires Linux >= "
1080                         "v4.4.\n"), stderr);
1081 }
1082
1083 /*
1084  * Update the feature set as provided by the user.
1085  */
1086 static int update_feature_set(ext2_filsys fs, char *features)
1087 {
1088         struct ext2_super_block *sb = fs->super;
1089         __u32           old_features[3];
1090         int             type_err;
1091         unsigned int    mask_err;
1092         errcode_t       err;
1093         enum quota_type qtype;
1094
1095 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1096                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1097 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1098                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1099 #define FEATURE_CHANGED(type, mask) ((mask) & \
1100                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1101
1102         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1103         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1104         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1105
1106         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1107                               ok_features, clear_ok_features,
1108                               &type_err, &mask_err)) {
1109                 if (!mask_err)
1110                         fprintf(stderr,
1111                                 _("Invalid filesystem option set: %s\n"),
1112                                 features);
1113                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1114                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1115                                           "not supported.\n"),
1116                                 e2p_feature2string(type_err &
1117                                                    E2P_FEATURE_TYPE_MASK,
1118                                                    mask_err));
1119                 else
1120                         fprintf(stderr, _("Setting filesystem feature '%s' "
1121                                           "not supported.\n"),
1122                                 e2p_feature2string(type_err, mask_err));
1123                 return 1;
1124         }
1125
1126         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1127                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1128                     !(mount_flags & EXT2_MF_READONLY)) {
1129                         fputs(_("The has_journal feature may only be "
1130                                 "cleared when the filesystem is\n"
1131                                 "unmounted or mounted "
1132                                 "read-only.\n"), stderr);
1133                         return 1;
1134                 }
1135                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1136                     f_flag < 2) {
1137                         fputs(_("The needs_recovery flag is set.  "
1138                                 "Please run e2fsck before clearing\n"
1139                                 "the has_journal flag.\n"), stderr);
1140                         return 1;
1141                 }
1142                 if (sb->s_journal_inum) {
1143                         if (remove_journal_inode(fs))
1144                                 return 1;
1145                 }
1146                 if (sb->s_journal_dev) {
1147                         if (remove_journal_device(fs))
1148                                 return 1;
1149                 }
1150         }
1151
1152         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1153                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1154                 if (ext2fs_has_feature_meta_bg(sb)) {
1155                         fputs(_("Setting filesystem feature 'sparse_super' "
1156                                 "not supported\nfor filesystems with "
1157                                 "the meta_bg feature enabled.\n"),
1158                                 stderr);
1159                         return 1;
1160                 }
1161         }
1162
1163         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1164                 int error;
1165
1166                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1167                     (mount_flags & EXT2_MF_READONLY)) {
1168                         fputs(_("The multiple mount protection feature can't\n"
1169                                 "be set if the filesystem is mounted or\n"
1170                                 "read-only.\n"), stderr);
1171                         return 1;
1172                 }
1173
1174                 error = ext2fs_mmp_init(fs);
1175                 if (error) {
1176                         fputs(_("\nError while enabling multiple mount "
1177                                 "protection feature."), stderr);
1178                         return 1;
1179                 }
1180
1181                 /*
1182                  * We want to update group desc with the new free blocks count
1183                  */
1184                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1185
1186                 printf(_("Multiple mount protection has been enabled "
1187                          "with update interval %ds.\n"),
1188                        sb->s_mmp_update_interval);
1189         }
1190
1191         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1192                 int error;
1193
1194                 if (mount_flags & EXT2_MF_READONLY) {
1195                         fputs(_("The multiple mount protection feature cannot\n"
1196                                 "be disabled if the filesystem is readonly.\n"),
1197                                 stderr);
1198                         return 1;
1199                 }
1200
1201                 error = ext2fs_read_bitmaps(fs);
1202                 if (error) {
1203                         fputs(_("Error while reading bitmaps\n"), stderr);
1204                         return 1;
1205                 }
1206
1207                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1208                 if (error) {
1209                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1210
1211                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1212                                 printf(_("Magic number in MMP block does not "
1213                                          "match. expected: %x, actual: %x\n"),
1214                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1215                         else
1216                                 com_err(program_name, error, "%s",
1217                                         _("while reading MMP block."));
1218                         goto mmp_error;
1219                 }
1220
1221                 /* We need to force out the group descriptors as well */
1222                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1223                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1224 mmp_error:
1225                 sb->s_mmp_block = 0;
1226                 sb->s_mmp_update_interval = 0;
1227         }
1228
1229         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1230                 /*
1231                  * If adding a journal flag, let the create journal
1232                  * code below handle setting the flag and creating the
1233                  * journal.  We supply a default size if necessary.
1234                  */
1235                 if (!journal_size)
1236                         journal_size = -1;
1237                 ext2fs_clear_feature_journal(sb);
1238         }
1239
1240         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1241                 if (!sb->s_def_hash_version)
1242                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1243                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1244                         uuid_generate((unsigned char *) sb->s_hash_seed);
1245         }
1246
1247         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
1248             ext2fs_has_feature_metadata_csum(sb)) {
1249                 if (check_fsck_needed(fs,
1250                         _("Disabling directory index on filesystem with "
1251                           "checksums could take some time.")))
1252                         return 1;
1253                 if (mount_flags & EXT2_MF_MOUNTED) {
1254                         fputs(_("Cannot disable dir_index on a mounted "
1255                                 "filesystem!\n"), stderr);
1256                         exit(1);
1257                 }
1258                 /*
1259                  * Clearing dir_index on checksummed filesystem requires
1260                  * rewriting all directories to update checksums.
1261                  */
1262                 rewrite_checksums |= REWRITE_DIR_FL;
1263         }
1264
1265         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1266                 if (ext2fs_check_desc(fs)) {
1267                         fputs(_("Clearing the flex_bg flag would "
1268                                 "cause the the filesystem to be\n"
1269                                 "inconsistent.\n"), stderr);
1270                         return 1;
1271                 }
1272         }
1273
1274         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1275                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1276                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1277                     !(mount_flags & EXT2_MF_READONLY)) {
1278                         fputs(_("The huge_file feature may only be "
1279                                 "cleared when the filesystem is\n"
1280                                 "unmounted or mounted "
1281                                 "read-only.\n"), stderr);
1282                         return 1;
1283                 }
1284         }
1285
1286         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1287                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1288                 if (check_fsck_needed(fs,
1289                         _("Enabling checksums could take some time.")))
1290                         return 1;
1291                 if (mount_flags & EXT2_MF_MOUNTED) {
1292                         fputs(_("Cannot enable metadata_csum on a mounted "
1293                                 "filesystem!\n"), stderr);
1294                         return 1;
1295                 }
1296                 if (!ext2fs_has_feature_extents(fs->super))
1297                         printf("%s",
1298                                _("Extents are not enabled.  The file extent "
1299                                  "tree can be checksummed, whereas block maps "
1300                                  "cannot.  Not enabling extents reduces the "
1301                                  "coverage of metadata checksumming.  "
1302                                  "Re-run with -O extent to rectify.\n"));
1303                 if (!ext2fs_has_feature_64bit(fs->super))
1304                         printf("%s",
1305                                _("64-bit filesystem support is not enabled.  "
1306                                  "The larger fields afforded by this feature "
1307                                  "enable full-strength checksumming.  "
1308                                  "Run resize2fs -b to rectify.\n"));
1309                 rewrite_checksums = REWRITE_ALL;
1310                 /* metadata_csum supersedes uninit_bg */
1311                 ext2fs_clear_feature_gdt_csum(fs->super);
1312
1313                 /* if uninit_bg was previously off, rewrite group desc */
1314                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1315                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1316                         enable_uninit_bg(fs);
1317
1318                 /*
1319                  * Since metadata_csum supersedes uninit_bg, pretend like
1320                  * uninit_bg has been off all along.
1321                  */
1322                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1323                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1324         }
1325
1326         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1327                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1328                 __u32   test_features[3];
1329
1330                 if (check_fsck_needed(fs,
1331                         _("Disabling checksums could take some time.")))
1332                         return 1;
1333                 if (mount_flags & EXT2_MF_MOUNTED) {
1334                         fputs(_("Cannot disable metadata_csum on a mounted "
1335                                 "filesystem!\n"), stderr);
1336                         return 1;
1337                 }
1338                 rewrite_checksums = REWRITE_ALL;
1339
1340                 /* Enable uninit_bg unless the user expressly turned it off */
1341                 memcpy(test_features, old_features, sizeof(test_features));
1342                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1343                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1344                 e2p_edit_feature2(features, test_features, ok_features,
1345                                   clear_ok_features, NULL, NULL);
1346                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1347                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1348                         ext2fs_set_feature_gdt_csum(fs->super);
1349
1350                 /*
1351                  * If we're turning off metadata_csum and not turning on
1352                  * uninit_bg, rewrite group desc.
1353                  */
1354                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1355                         err = disable_uninit_bg(fs,
1356                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1357                         if (err)
1358                                 return 1;
1359                 } else
1360                         /*
1361                          * metadata_csum previously provided uninit_bg, so if
1362                          * we're also setting the uninit_bg feature bit,
1363                          * pretend like it was previously enabled.  Checksums
1364                          * will be rewritten with crc16 later.
1365                          */
1366                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1367                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1368                 fs->super->s_checksum_seed = 0;
1369                 ext2fs_clear_feature_csum_seed(fs->super);
1370         }
1371
1372         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1373                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1374                 if (mount_flags & EXT2_MF_MOUNTED) {
1375                         fputs(_("Cannot enable uninit_bg on a mounted "
1376                                 "filesystem!\n"), stderr);
1377                         return 1;
1378                 }
1379
1380                 /* Do not enable uninit_bg when metadata_csum enabled */
1381                 if (ext2fs_has_feature_metadata_csum(fs->super))
1382                         ext2fs_clear_feature_gdt_csum(fs->super);
1383                 else
1384                         enable_uninit_bg(fs);
1385         }
1386
1387         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1388                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1389                 if (mount_flags & EXT2_MF_MOUNTED) {
1390                         fputs(_("Cannot disable uninit_bg on a mounted "
1391                                 "filesystem!\n"), stderr);
1392                         return 1;
1393                 }
1394
1395                 err = disable_uninit_bg(fs,
1396                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1397                 if (err)
1398                         return 1;
1399         }
1400
1401         /*
1402          * We don't actually toggle 64bit; resize2fs does that.  But this
1403          * must come after the metadata_csum feature_on so that it won't
1404          * complain about the lack of 64bit.
1405          */
1406         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1407                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1408                 if (mount_flags & EXT2_MF_MOUNTED) {
1409                         fprintf(stderr, _("Cannot enable 64-bit mode "
1410                                           "while mounted!\n"));
1411                         return 1;
1412                 }
1413                 ext2fs_clear_feature_64bit(sb);
1414                 feature_64bit = 1;
1415         }
1416         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1417                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1418                 if (mount_flags & EXT2_MF_MOUNTED) {
1419                         fprintf(stderr, _("Cannot disable 64-bit mode "
1420                                           "while mounted!\n"));
1421                         return 1;
1422                 }
1423                 ext2fs_set_feature_64bit(sb);
1424                 feature_64bit = -1;
1425         }
1426
1427         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1428                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1429                 /*
1430                  * Set the Q_flag here and handle the quota options in the code
1431                  * below.
1432                  */
1433                 if (!Q_flag) {
1434                         Q_flag = 1;
1435                         /* Enable usr/grp quota by default */
1436                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1437                                 if (qtype != PRJQUOTA)
1438                                         quota_enable[qtype] = QOPT_ENABLE;
1439                                 else
1440                                         quota_enable[qtype] = QOPT_DISABLE;
1441                         }
1442                 }
1443                 ext2fs_clear_feature_quota(sb);
1444         }
1445
1446         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1447                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1448                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1449                         fprintf(stderr, _("Cannot enable project feature; "
1450                                           "inode size too small.\n"));
1451                         return 1;
1452                 }
1453                 Q_flag = 1;
1454                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1455         }
1456
1457         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1458                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1459                 Q_flag = 1;
1460                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1461         }
1462
1463         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1464                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1465                 /*
1466                  * Set the Q_flag here and handle the quota options in the code
1467                  * below.
1468                  */
1469                 if (Q_flag)
1470                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1471                                 "arguments.\n"), stderr);
1472                 Q_flag = 1;
1473                 /* Disable all quota by default */
1474                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1475                         quota_enable[qtype] = QOPT_DISABLE;
1476         }
1477
1478         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1479                 fs->super->s_encrypt_algos[0] =
1480                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1481                 fs->super->s_encrypt_algos[1] =
1482                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1483         }
1484
1485         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1486                 if (mount_flags & EXT2_MF_MOUNTED) {
1487                         fputs(_("The casefold feature may only be enabled when "
1488                                 "the filesystem is unmounted.\n"), stderr);
1489                         return 1;
1490                 }
1491                 fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
1492                 fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
1493                 enabling_casefold = 1;
1494         }
1495
1496         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1497                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1498                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1499                         fputs(_("Setting feature 'metadata_csum_seed' "
1500                                 "is only supported\non filesystems with "
1501                                 "the metadata_csum feature enabled.\n"),
1502                                 stderr);
1503                         return 1;
1504                 }
1505                 try_confirm_csum_seed_support();
1506                 fs->super->s_checksum_seed = fs->csum_seed;
1507         }
1508
1509         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1510                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1511                 __le32 uuid_seed;
1512
1513                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1514                                         sizeof(fs->super->s_uuid));
1515                 if (fs->super->s_checksum_seed != uuid_seed) {
1516                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1517                                 fputs(_("UUID has changed since enabling "
1518                 "metadata_csum.  Filesystem must be unmounted "
1519                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1520                                       stderr);
1521                                 return 1;
1522                         }
1523                         if (check_fsck_needed(fs, _("Recalculating checksums "
1524                                                     "could take some time.")))
1525                                 return 1;
1526                         rewrite_checksums = REWRITE_ALL;
1527                 }
1528         }
1529
1530         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1531             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1532              sb->s_feature_incompat))
1533                 ext2fs_update_dynamic_rev(fs);
1534
1535         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1536                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1537             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1538                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1539             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1540                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1541             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1542                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1543             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1544                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1545                 request_fsck_afterwards(fs);
1546
1547         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1548             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1549             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1550                 ext2fs_mark_super_dirty(fs);
1551
1552         return 0;
1553 }
1554
1555 /*
1556  * Add a journal to the filesystem.
1557  */
1558 static int add_journal(ext2_filsys fs)
1559 {
1560         struct ext2fs_journal_params    jparams;
1561         errcode_t       retval;
1562         ext2_filsys     jfs;
1563         io_manager      io_ptr;
1564
1565         if (ext2fs_has_feature_journal(fs->super)) {
1566                 fputs(_("The filesystem already has a journal.\n"), stderr);
1567                 goto err;
1568         }
1569         if (journal_device) {
1570                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1571                                         NULL))
1572                         proceed_question(-1);
1573                 check_mount(journal_device, 0, _("journal"));
1574 #ifdef CONFIG_TESTIO_DEBUG
1575                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1576                         io_ptr = test_io_manager;
1577                         test_io_backing_manager = unix_io_manager;
1578                 } else
1579 #endif
1580                         io_ptr = unix_io_manager;
1581                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1582                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1583                                      fs->blocksize, io_ptr, &jfs);
1584                 if (retval) {
1585                         com_err(program_name, retval,
1586                                 _("\n\twhile trying to open journal on %s\n"),
1587                                 journal_device);
1588                         goto err;
1589                 }
1590                 printf(_("Creating journal on device %s: "),
1591                        journal_device);
1592                 fflush(stdout);
1593
1594                 retval = ext2fs_add_journal_device(fs, jfs);
1595                 ext2fs_close_free(&jfs);
1596                 if (retval) {
1597                         com_err(program_name, retval,
1598                                 _("while adding filesystem to journal on %s"),
1599                                 journal_device);
1600                         goto err;
1601                 }
1602                 fputs(_("done\n"), stdout);
1603         } else if (journal_size) {
1604                 fputs(_("Creating journal inode: "), stdout);
1605                 fflush(stdout);
1606                 figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
1607
1608                 if (journal_location_string)
1609                         journal_location =
1610                                 parse_num_blocks2(journal_location_string,
1611                                                   fs->super->s_log_block_size);
1612                 retval = ext2fs_add_journal_inode3(fs, &jparams,
1613                                                    journal_location,
1614                                                    journal_flags);
1615                 if (retval) {
1616                         fprintf(stderr, "\n");
1617                         com_err(program_name, retval, "%s",
1618                                 _("\n\twhile trying to create journal file"));
1619                         return retval;
1620                 }
1621                 fs->super->s_overhead_clusters += EXT2FS_NUM_B2C(fs,
1622                         jparams.num_journal_blocks + jparams.num_fc_blocks);
1623                 ext2fs_mark_super_dirty(fs);
1624                 fputs(_("done\n"), stdout);
1625
1626                 /*
1627                  * If the filesystem wasn't mounted, we need to force
1628                  * the block group descriptors out.
1629                  */
1630                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1631                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1632         }
1633         print_check_message(fs->super->s_max_mnt_count,
1634                             fs->super->s_checkinterval);
1635         return 0;
1636
1637 err:
1638         free(journal_device);
1639         return 1;
1640 }
1641
1642 static int handle_quota_options(ext2_filsys fs)
1643 {
1644         errcode_t retval;
1645         quota_ctx_t qctx;
1646         ext2_ino_t qf_ino;
1647         enum quota_type qtype;
1648         unsigned int qtype_bits = 0;
1649         int need_dirty = 0;
1650
1651         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1652                 if (quota_enable[qtype] != 0)
1653                         break;
1654         if (qtype == MAXQUOTAS)
1655                 /* Nothing to do. */
1656                 return 0;
1657
1658         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1659             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1660                 fprintf(stderr, _("Cannot enable project quota; "
1661                                   "inode size too small.\n"));
1662                 return 1;
1663         }
1664
1665         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1666                 if (quota_enable[qtype] == QOPT_ENABLE)
1667                         qtype_bits |= 1 << qtype;
1668         }
1669
1670         retval = quota_init_context(&qctx, fs, qtype_bits);
1671         if (retval) {
1672                 com_err(program_name, retval,
1673                         _("while initializing quota context in support library"));
1674                 return 1;
1675         }
1676
1677         if (qtype_bits)
1678                 quota_compute_usage(qctx);
1679
1680         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1681                 if (quota_enable[qtype] == QOPT_ENABLE &&
1682                     *quota_sb_inump(fs->super, qtype) == 0) {
1683                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1684                                 retval = quota_read_all_dquots(qctx, qf_ino,
1685                                                                qtype,
1686                                                                QREAD_LIMITS);
1687                                 if (retval) {
1688                                         com_err(program_name, retval,
1689                                                 _("while updating quota limits (%d)"),
1690                                                 qtype);
1691                                 quota_errout:
1692                                         quota_release_context(&qctx);
1693                                         return 1;
1694                                 }
1695                         }
1696                         retval = quota_write_inode(qctx, 1 << qtype);
1697                         if (retval) {
1698                                 com_err(program_name, retval,
1699                                         _("while writing quota file (%d)"),
1700                                         qtype);
1701                                 goto quota_errout;
1702                         }
1703                         /* Enable Quota feature if one of quota enabled */
1704                         if (!ext2fs_has_feature_quota(fs->super)) {
1705                                 ext2fs_set_feature_quota(fs->super);
1706                                 need_dirty = 1;
1707                         }
1708                         if (qtype == PRJQUOTA &&
1709                             !ext2fs_has_feature_project(fs->super)) {
1710                                 ext2fs_set_feature_project(fs->super);
1711                                 need_dirty = 1;
1712                         }
1713                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1714                         retval = quota_remove_inode(fs, qtype);
1715                         if (retval) {
1716                                 com_err(program_name, retval,
1717                                         _("while removing quota file (%d)"),
1718                                         qtype);
1719                                 goto quota_errout;
1720                         }
1721                         if (qtype == PRJQUOTA) {
1722                                 ext2fs_clear_feature_project(fs->super);
1723                                 need_dirty = 1;
1724                         }
1725                 }
1726         }
1727
1728         quota_release_context(&qctx);
1729         /* Clear Quota feature if all quota types disabled. */
1730         if (!qtype_bits) {
1731                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1732                         if (*quota_sb_inump(fs->super, qtype))
1733                                 break;
1734                 if (qtype == MAXQUOTAS) {
1735                         ext2fs_clear_feature_quota(fs->super);
1736                         need_dirty = 1;
1737                 }
1738
1739         }
1740         if (need_dirty)
1741                 ext2fs_mark_super_dirty(fs);
1742         return 0;
1743 }
1744
1745 static int option_handle_function(char *token)
1746 {
1747         if (strncmp(token, "usr", 3) == 0) {
1748                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1749         } else if (strncmp(token, "^usr", 4) == 0) {
1750                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1751         } else if (strncmp(token, "grp", 3) == 0) {
1752                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1753         } else if (strncmp(token, "^grp", 4) == 0) {
1754                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1755         } else if (strncmp(token, "prj", 3) == 0) {
1756                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1757         } else if (strncmp(token, "^prj", 4) == 0) {
1758                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1759         } else {
1760                 fputs(_("\nBad quota options specified.\n\n"
1761                         "Following valid quota options are available "
1762                         "(pass by separating with comma):\n"
1763                         "\t[^]usr[quota]\n"
1764                         "\t[^]grp[quota]\n"
1765                         "\t[^]prj[quota]\n"
1766                         "\n\n"), stderr);
1767                 return 1;
1768         }
1769         return 0;
1770 }
1771
1772 static void parse_e2label_options(int argc, char ** argv)
1773 {
1774         if ((argc < 2) || (argc > 3)) {
1775                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1776                 exit(1);
1777         }
1778         io_options = strchr(argv[1], '?');
1779         if (io_options)
1780                 *io_options++ = 0;
1781         device_name = get_devname(NULL, argv[1], NULL);
1782         if (!device_name) {
1783                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1784                         argv[1]);
1785                 exit(1);
1786         }
1787         open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
1788         if (argc == 3) {
1789                 open_flag |= EXT2_FLAG_RW;
1790                 L_flag = 1;
1791                 new_label = argv[2];
1792         } else
1793                 print_label++;
1794 }
1795
1796 static time_t parse_time(char *str)
1797 {
1798         struct  tm      ts;
1799
1800         if (strcmp(str, "now") == 0) {
1801                 return (time(0));
1802         }
1803         memset(&ts, 0, sizeof(ts));
1804 #ifdef HAVE_STRPTIME
1805         strptime(str, "%Y%m%d%H%M%S", &ts);
1806 #else
1807         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1808                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1809         ts.tm_year -= 1900;
1810         ts.tm_mon -= 1;
1811         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1812             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1813             ts.tm_min > 59 || ts.tm_sec > 61)
1814                 ts.tm_mday = 0;
1815 #endif
1816         if (ts.tm_mday == 0) {
1817                 com_err(program_name, 0,
1818                         _("Couldn't parse date/time specifier: %s"),
1819                         str);
1820                 usage();
1821         }
1822         ts.tm_isdst = -1;
1823         return (mktime(&ts));
1824 }
1825
1826 static void parse_tune2fs_options(int argc, char **argv)
1827 {
1828         int c;
1829         char *tmp;
1830         struct group *gr;
1831         struct passwd *pw;
1832         int ret;
1833         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1834
1835         open_flag = 0;
1836         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1837         while ((c = getopt(argc, argv, optstring)) != EOF)
1838                 switch (c) {
1839                 case 'c':
1840                         open_flag = EXT2_FLAG_RW;
1841                         c_flag = 1;
1842                         if (strcmp(optarg, "random") == 0) {
1843                                 max_mount_count = 65536;
1844                                 break;
1845                         }
1846                         max_mount_count = strtol(optarg, &tmp, 0);
1847                         if (*tmp || max_mount_count > 16000 ||
1848                             max_mount_count < -16000) {
1849                                 com_err(program_name, 0,
1850                                         _("bad mounts count - %s"),
1851                                         optarg);
1852                                 usage();
1853                         }
1854                         if (max_mount_count == 0)
1855                                 max_mount_count = -1;
1856                         break;
1857                 case 'C':
1858                         mount_count = strtoul(optarg, &tmp, 0);
1859                         if (*tmp || mount_count > 16000) {
1860                                 com_err(program_name, 0,
1861                                         _("bad mounts count - %s"),
1862                                         optarg);
1863                                 usage();
1864                         }
1865                         C_flag = 1;
1866                         open_flag = EXT2_FLAG_RW;
1867                         break;
1868                 case 'e':
1869                         if (strcmp(optarg, "continue") == 0)
1870                                 errors = EXT2_ERRORS_CONTINUE;
1871                         else if (strcmp(optarg, "remount-ro") == 0)
1872                                 errors = EXT2_ERRORS_RO;
1873                         else if (strcmp(optarg, "panic") == 0)
1874                                 errors = EXT2_ERRORS_PANIC;
1875                         else {
1876                                 com_err(program_name, 0,
1877                                         _("bad error behavior - %s"),
1878                                         optarg);
1879                                 usage();
1880                         }
1881                         e_flag = 1;
1882                         open_flag = EXT2_FLAG_RW;
1883                         break;
1884                 case 'E':
1885                         extended_cmd = optarg;
1886                         open_flag |= EXT2_FLAG_RW;
1887                         break;
1888                 case 'f': /* Force */
1889                         f_flag++;
1890                         break;
1891                 case 'g':
1892                         resgid = strtoul(optarg, &tmp, 0);
1893                         if (*tmp) {
1894                                 gr = getgrnam(optarg);
1895                                 if (gr == NULL)
1896                                         tmp = optarg;
1897                                 else {
1898                                         resgid = gr->gr_gid;
1899                                         *tmp = 0;
1900                                 }
1901                         }
1902                         if (*tmp) {
1903                                 com_err(program_name, 0,
1904                                         _("bad gid/group name - %s"),
1905                                         optarg);
1906                                 usage();
1907                         }
1908                         g_flag = 1;
1909                         open_flag = EXT2_FLAG_RW;
1910                         break;
1911                 case 'i':
1912                         interval = strtoul(optarg, &tmp, 0);
1913                         switch (*tmp) {
1914                         case 's':
1915                                 tmp++;
1916                                 break;
1917                         case '\0':
1918                         case 'd':
1919                         case 'D': /* days */
1920                                 interval *= 86400;
1921                                 if (*tmp != '\0')
1922                                         tmp++;
1923                                 break;
1924                         case 'm':
1925                         case 'M': /* months! */
1926                                 interval *= 86400 * 30;
1927                                 tmp++;
1928                                 break;
1929                         case 'w':
1930                         case 'W': /* weeks */
1931                                 interval *= 86400 * 7;
1932                                 tmp++;
1933                                 break;
1934                         }
1935                         if (*tmp) {
1936                                 com_err(program_name, 0,
1937                                         _("bad interval - %s"), optarg);
1938                                 usage();
1939                         }
1940                         i_flag = 1;
1941                         open_flag = EXT2_FLAG_RW;
1942                         break;
1943                 case 'j':
1944                         if (!journal_size)
1945                                 journal_size = -1;
1946                         open_flag = EXT2_FLAG_RW;
1947                         break;
1948                 case 'J':
1949                         parse_journal_opts(optarg);
1950                         open_flag = EXT2_FLAG_RW;
1951                         break;
1952                 case 'l':
1953                         l_flag = 1;
1954                         break;
1955                 case 'L':
1956                         new_label = optarg;
1957                         L_flag = 1;
1958                         open_flag |= EXT2_FLAG_RW |
1959                                 EXT2_FLAG_JOURNAL_DEV_OK;
1960                         break;
1961                 case 'm':
1962                         reserved_ratio = strtod(optarg, &tmp);
1963                         if (*tmp || reserved_ratio > 50 ||
1964                             reserved_ratio < 0) {
1965                                 com_err(program_name, 0,
1966                                         _("bad reserved block ratio - %s"),
1967                                         optarg);
1968                                 usage();
1969                         }
1970                         m_flag = 1;
1971                         open_flag = EXT2_FLAG_RW;
1972                         break;
1973                 case 'M':
1974                         new_last_mounted = optarg;
1975                         M_flag = 1;
1976                         open_flag = EXT2_FLAG_RW;
1977                         break;
1978                 case 'o':
1979                         if (mntopts_cmd) {
1980                                 com_err(program_name, 0, "%s",
1981                                         _("-o may only be specified once"));
1982                                 usage();
1983                         }
1984                         mntopts_cmd = optarg;
1985                         open_flag = EXT2_FLAG_RW;
1986                         break;
1987                 case 'O':
1988                         if (features_cmd) {
1989                                 com_err(program_name, 0, "%s",
1990                                         _("-O may only be specified once"));
1991                                 usage();
1992                         }
1993                         features_cmd = optarg;
1994                         open_flag = EXT2_FLAG_RW;
1995                         break;
1996                 case 'Q':
1997                         Q_flag = 1;
1998                         ret = parse_quota_opts(optarg, option_handle_function);
1999                         if (ret)
2000                                 exit(1);
2001                         open_flag = EXT2_FLAG_RW;
2002                         break;
2003                 case 'r':
2004                         reserved_blocks = strtoul(optarg, &tmp, 0);
2005                         if (*tmp) {
2006                                 com_err(program_name, 0,
2007                                         _("bad reserved blocks count - %s"),
2008                                         optarg);
2009                                 usage();
2010                         }
2011                         r_flag = 1;
2012                         open_flag = EXT2_FLAG_RW;
2013                         break;
2014                 case 's': /* Deprecated */
2015                         s_flag = atoi(optarg);
2016                         open_flag = EXT2_FLAG_RW;
2017                         break;
2018                 case 'T':
2019                         T_flag = 1;
2020                         last_check_time = parse_time(optarg);
2021                         open_flag = EXT2_FLAG_RW;
2022                         break;
2023                 case 'u':
2024                                 resuid = strtoul(optarg, &tmp, 0);
2025                                 if (*tmp) {
2026                                         pw = getpwnam(optarg);
2027                                         if (pw == NULL)
2028                                                 tmp = optarg;
2029                                         else {
2030                                                 resuid = pw->pw_uid;
2031                                                 *tmp = 0;
2032                                         }
2033                                 }
2034                                 if (*tmp) {
2035                                         com_err(program_name, 0,
2036                                                 _("bad uid/user name - %s"),
2037                                                 optarg);
2038                                         usage();
2039                                 }
2040                                 u_flag = 1;
2041                                 open_flag = EXT2_FLAG_RW;
2042                                 break;
2043                 case 'U':
2044                         new_UUID = optarg;
2045                         U_flag = 1;
2046                         open_flag = EXT2_FLAG_RW |
2047                                 EXT2_FLAG_JOURNAL_DEV_OK;
2048                         break;
2049                 case 'I':
2050                         new_inode_size = strtoul(optarg, &tmp, 0);
2051                         if (*tmp) {
2052                                 com_err(program_name, 0,
2053                                         _("bad inode size - %s"),
2054                                         optarg);
2055                                 usage();
2056                         }
2057                         if (!((new_inode_size &
2058                                (new_inode_size - 1)) == 0)) {
2059                                 com_err(program_name, 0,
2060                                         _("Inode size must be a "
2061                                           "power of two- %s"),
2062                                         optarg);
2063                                 usage();
2064                         }
2065                         open_flag = EXT2_FLAG_RW;
2066                         I_flag = 1;
2067                         break;
2068                 case 'z':
2069                         undo_file = optarg;
2070                         break;
2071                 default:
2072                         usage();
2073                 }
2074         if (optind < argc - 1 || optind == argc)
2075                 usage();
2076         if (!open_flag && !l_flag)
2077                 usage();
2078         io_options = strchr(argv[optind], '?');
2079         if (io_options)
2080                 *io_options++ = 0;
2081         device_name = get_devname(NULL, argv[optind], NULL);
2082         if (!device_name) {
2083                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2084                         argv[optind]);
2085                 exit(1);
2086         }
2087 }
2088
2089 #ifdef CONFIG_BUILD_FINDFS
2090 void do_findfs(int argc, char **argv)
2091 {
2092         char    *dev;
2093
2094         if ((argc != 2) ||
2095             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2096                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2097                 exit(2);
2098         }
2099         dev = blkid_get_devname(NULL, argv[1], NULL);
2100         if (!dev) {
2101                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2102                         argv[1]);
2103                 exit(1);
2104         }
2105         puts(dev);
2106         exit(0);
2107 }
2108 #endif
2109
2110 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2111 {
2112         struct ext2_super_block *sb = fs->super;
2113         char    *buf, *token, *next, *p, *arg;
2114         int     len, hash_alg;
2115         int     r_usage = 0;
2116         int encoding = 0;
2117         char    *encoding_flags = NULL;
2118
2119         len = strlen(opts);
2120         buf = malloc(len+1);
2121         if (!buf) {
2122                 fprintf(stderr, "%s",
2123                         _("Couldn't allocate memory to parse options!\n"));
2124                 return 1;
2125         }
2126         strcpy(buf, opts);
2127         for (token = buf; token && *token; token = next) {
2128                 p = strchr(token, ',');
2129                 next = 0;
2130                 if (p) {
2131                         *p = 0;
2132                         next = p+1;
2133                 }
2134                 arg = strchr(token, '=');
2135                 if (arg) {
2136                         *arg = 0;
2137                         arg++;
2138                 }
2139                 if (strcmp(token, "clear-mmp") == 0 ||
2140                     strcmp(token, "clear_mmp") == 0) {
2141                         clear_mmp = 1;
2142                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2143                         unsigned long intv;
2144                         if (!arg) {
2145                                 r_usage++;
2146                                 continue;
2147                         }
2148                         intv = strtoul(arg, &p, 0);
2149                         if (*p) {
2150                                 fprintf(stderr,
2151                                         _("Invalid mmp_update_interval: %s\n"),
2152                                         arg);
2153                                 r_usage++;
2154                                 continue;
2155                         }
2156                         if (intv == 0) {
2157                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2158                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2159                                 fprintf(stderr,
2160                                         _("mmp_update_interval too big: %lu\n"),
2161                                         intv);
2162                                 r_usage++;
2163                                 continue;
2164                         }
2165                         printf(P_("Setting multiple mount protection update "
2166                                   "interval to %lu second\n",
2167                                   "Setting multiple mount protection update "
2168                                   "interval to %lu seconds\n", intv),
2169                                intv);
2170                         sb->s_mmp_update_interval = intv;
2171                         ext2fs_mark_super_dirty(fs);
2172                 } else if (!strcmp(token, "force_fsck")) {
2173                         sb->s_state |= EXT2_ERROR_FS;
2174                         printf(_("Setting filesystem error flag to force fsck.\n"));
2175                         ext2fs_mark_super_dirty(fs);
2176                 } else if (!strcmp(token, "test_fs")) {
2177                         sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2178                         printf("Setting test filesystem flag\n");
2179                         ext2fs_mark_super_dirty(fs);
2180                 } else if (!strcmp(token, "^test_fs")) {
2181                         sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2182                         printf("Clearing test filesystem flag\n");
2183                         ext2fs_mark_super_dirty(fs);
2184                 } else if (strcmp(token, "stride") == 0) {
2185                         if (!arg) {
2186                                 r_usage++;
2187                                 continue;
2188                         }
2189                         stride = strtoul(arg, &p, 0);
2190                         if (*p) {
2191                                 fprintf(stderr,
2192                                         _("Invalid RAID stride: %s\n"),
2193                                         arg);
2194                                 r_usage++;
2195                                 continue;
2196                         }
2197                         stride_set = 1;
2198                 } else if (strcmp(token, "stripe-width") == 0 ||
2199                            strcmp(token, "stripe_width") == 0) {
2200                         if (!arg) {
2201                                 r_usage++;
2202                                 continue;
2203                         }
2204                         stripe_width = strtoul(arg, &p, 0);
2205                         if (*p) {
2206                                 fprintf(stderr,
2207                                         _("Invalid RAID stripe-width: %s\n"),
2208                                         arg);
2209                                 r_usage++;
2210                                 continue;
2211                         }
2212                         stripe_width_set = 1;
2213                 } else if (strcmp(token, "hash_alg") == 0 ||
2214                            strcmp(token, "hash-alg") == 0) {
2215                         if (!arg) {
2216                                 r_usage++;
2217                                 continue;
2218                         }
2219                         hash_alg = e2p_string2hash(arg);
2220                         if (hash_alg < 0) {
2221                                 fprintf(stderr,
2222                                         _("Invalid hash algorithm: %s\n"),
2223                                         arg);
2224                                 r_usage++;
2225                                 continue;
2226                         }
2227                         sb->s_def_hash_version = hash_alg;
2228                         printf(_("Setting default hash algorithm "
2229                                  "to %s (%d)\n"),
2230                                arg, hash_alg);
2231                         ext2fs_mark_super_dirty(fs);
2232                 } else if (!strcmp(token, "mount_opts")) {
2233                         if (!arg) {
2234                                 r_usage++;
2235                                 continue;
2236                         }
2237                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2238                                 fprintf(stderr,
2239                                         "Extended mount options too long\n");
2240                                 continue;
2241                         }
2242                         ext_mount_opts = strdup(arg);
2243                 } else if (!strcmp(token, "encoding")) {
2244                         if (!arg) {
2245                                 r_usage++;
2246                                 continue;
2247                         }
2248                         if (mount_flags & EXT2_MF_MOUNTED) {
2249                                 fputs(_("The casefold feature may only be enabled when "
2250                                         "the filesystem is unmounted.\n"), stderr);
2251                                 r_usage++;
2252                                 continue;
2253                         }
2254                         if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
2255                                 fprintf(stderr, _("Cannot alter existing encoding\n"));
2256                                 r_usage++;
2257                                 continue;
2258                         }
2259                         encoding = e2p_str2encoding(arg);
2260                         if (encoding < 0) {
2261                                 fprintf(stderr, _("Invalid encoding: %s\n"), arg);
2262                                 r_usage++;
2263                                 continue;
2264                         }
2265                         enabling_casefold = 1;
2266                         sb->s_encoding = encoding;
2267                         printf(_("Setting encoding to '%s'\n"), arg);
2268                         sb->s_encoding_flags =
2269                                 e2p_get_encoding_flags(sb->s_encoding);
2270                 } else if (!strcmp(token, "encoding_flags")) {
2271                         if (!arg) {
2272                                 r_usage++;
2273                                 continue;
2274                         }
2275                         encoding_flags = arg;
2276                 } else
2277                         r_usage++;
2278         }
2279
2280         if (encoding > 0 && !r_usage) {
2281                 sb->s_encoding_flags =
2282                         e2p_get_encoding_flags(sb->s_encoding);
2283
2284                 if (encoding_flags &&
2285                     e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
2286                                            &sb->s_encoding_flags)) {
2287                         fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
2288                                         encoding_flags);
2289                         r_usage++;
2290                 } else if (encoding_flags)
2291                         printf(_("Setting encoding_flags to '%s'\n"),
2292                                  encoding_flags);
2293                 ext2fs_set_feature_casefold(sb);
2294                 ext2fs_mark_super_dirty(fs);
2295         } else if (encoding_flags && !r_usage) {
2296                 fprintf(stderr, _("error: An encoding must be explicitly "
2297                                   "specified when passing encoding-flags\n"));
2298                 r_usage++;
2299         }
2300         if (r_usage) {
2301                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2302                         "Extended options are separated by commas, "
2303                         "and may take an argument which\n"
2304                         "\tis set off by an equals ('=') sign.\n\n"
2305                         "Valid extended options are:\n"
2306                         "\tclear_mmp\n"
2307                         "\thash_alg=<hash algorithm>\n"
2308                         "\tmount_opts=<extended default mount options>\n"
2309                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2310                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2311                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2312                         "\tforce_fsck\n"
2313                         "\ttest_fs\n"
2314                         "\t^test_fs\n"
2315                         "\tencoding=<encoding>\n"
2316                         "\tencoding_flags=<flags>\n"));
2317                 free(buf);
2318                 return 1;
2319         }
2320         free(buf);
2321
2322         return 0;
2323 }
2324
2325 /*
2326  * Fill in the block bitmap bmap with the information regarding the
2327  * blocks to be moved
2328  */
2329 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2330                             ext2fs_block_bitmap bmap)
2331 {
2332         dgrp_t i;
2333         int retval;
2334         ext2_badblocks_list bb_list = 0;
2335         blk64_t j, needed_blocks = 0;
2336         blk64_t start_blk, end_blk;
2337
2338         retval = ext2fs_read_bb_inode(fs, &bb_list);
2339         if (retval)
2340                 return retval;
2341
2342         for (i = 0; i < fs->group_desc_count; i++) {
2343                 start_blk = ext2fs_inode_table_loc(fs, i) +
2344                                         fs->inode_blocks_per_group;
2345
2346                 end_blk = ext2fs_inode_table_loc(fs, i) +
2347                                         new_ino_blks_per_grp;
2348
2349                 for (j = start_blk; j < end_blk; j++) {
2350                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2351                                 /*
2352                                  * IF the block is a bad block we fail
2353                                  */
2354                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2355                                         ext2fs_badblocks_list_free(bb_list);
2356                                         return ENOSPC;
2357                                 }
2358
2359                                 ext2fs_mark_block_bitmap2(bmap, j);
2360                         } else {
2361                                 /*
2362                                  * We are going to use this block for
2363                                  * inode table. So mark them used.
2364                                  */
2365                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2366                         }
2367                 }
2368                 needed_blocks += end_blk - start_blk;
2369         }
2370
2371         ext2fs_badblocks_list_free(bb_list);
2372         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2373                 return ENOSPC;
2374
2375         return 0;
2376 }
2377
2378 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2379 {
2380         dgrp_t group;
2381         group = ext2fs_group_of_blk2(fs, blk);
2382         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2383                 return 1;
2384         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2385                 return 1;
2386         return 0;
2387 }
2388
2389 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2390 {
2391         blk64_t start_blk, end_blk;
2392         start_blk = fs->super->s_first_data_block +
2393                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2394         /*
2395          * We cannot get new block beyond end_blk for for the last block group
2396          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2397          */
2398         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2399         if (blk >= start_blk && blk <= end_blk)
2400                 return 1;
2401         return 0;
2402 }
2403
2404 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2405 {
2406
2407         char *buf;
2408         dgrp_t group = 0;
2409         errcode_t retval;
2410         int meta_data = 0;
2411         blk64_t blk, new_blk, goal;
2412         struct blk_move *bmv;
2413
2414         retval = ext2fs_get_mem(fs->blocksize, &buf);
2415         if (retval)
2416                 return retval;
2417
2418         for (new_blk = blk = fs->super->s_first_data_block;
2419              blk < ext2fs_blocks_count(fs->super); blk++) {
2420                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2421                         continue;
2422
2423                 if (ext2fs_is_meta_block(fs, blk)) {
2424                         /*
2425                          * If the block is mapping a fs meta data block
2426                          * like group desc/block bitmap/inode bitmap. We
2427                          * should find a block in the same group and fix
2428                          * the respective fs metadata pointers. Otherwise
2429                          * fail
2430                          */
2431                         group = ext2fs_group_of_blk2(fs, blk);
2432                         goal = ext2fs_group_first_block2(fs, group);
2433                         meta_data = 1;
2434
2435                 } else {
2436                         goal = new_blk;
2437                 }
2438                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2439                 if (retval)
2440                         goto err_out;
2441
2442                 /* new fs meta data block should be in the same group */
2443                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2444                         retval = ENOSPC;
2445                         goto err_out;
2446                 }
2447
2448                 /* Mark this block as allocated */
2449                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2450
2451                 /* Add it to block move list */
2452                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2453                 if (retval)
2454                         goto err_out;
2455
2456                 bmv->old_loc = blk;
2457                 bmv->new_loc = new_blk;
2458
2459                 list_add(&(bmv->list), &blk_move_list);
2460
2461                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2462                 if (retval)
2463                         goto err_out;
2464
2465                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2466                 if (retval)
2467                         goto err_out;
2468         }
2469
2470 err_out:
2471         ext2fs_free_mem(&buf);
2472         return retval;
2473 }
2474
2475 static blk64_t translate_block(blk64_t blk)
2476 {
2477         struct list_head *entry;
2478         struct blk_move *bmv;
2479
2480         list_for_each(entry, &blk_move_list) {
2481                 bmv = list_entry(entry, struct blk_move, list);
2482                 if (bmv->old_loc == blk)
2483                         return bmv->new_loc;
2484         }
2485
2486         return 0;
2487 }
2488
2489 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2490                          blk64_t *block_nr,
2491                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2492                          blk64_t ref_block EXT2FS_ATTR((unused)),
2493                          int ref_offset EXT2FS_ATTR((unused)),
2494                          void *priv_data)
2495 {
2496         int ret = 0;
2497         blk64_t new_blk;
2498         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2499
2500         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2501                 return 0;
2502         new_blk = translate_block(*block_nr);
2503         if (new_blk) {
2504                 *block_nr = new_blk;
2505                 /*
2506                  * This will force the ext2fs_write_inode in the iterator
2507                  */
2508                 ret |= BLOCK_CHANGED;
2509         }
2510
2511         return ret;
2512 }
2513
2514 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2515 {
2516         errcode_t retval = 0;
2517         ext2_ino_t ino;
2518         blk64_t blk;
2519         char *block_buf = 0;
2520         struct ext2_inode inode;
2521         ext2_inode_scan scan = NULL;
2522
2523         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2524         if (retval)
2525                 return retval;
2526
2527         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2528         if (retval)
2529                 goto err_out;
2530
2531         while (1) {
2532                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2533                 if (retval)
2534                         goto err_out;
2535
2536                 if (!ino)
2537                         break;
2538
2539                 if (inode.i_links_count == 0)
2540                         continue; /* inode not in use */
2541
2542                 /* FIXME!!
2543                  * If we end up modifying the journal inode
2544                  * the sb->s_jnl_blocks will differ. But a
2545                  * subsequent e2fsck fixes that.
2546                  * Do we need to fix this ??
2547                  */
2548
2549                 if (ext2fs_file_acl_block(fs, &inode) &&
2550                     ext2fs_test_block_bitmap2(bmap,
2551                                         ext2fs_file_acl_block(fs, &inode))) {
2552                         blk = translate_block(ext2fs_file_acl_block(fs,
2553                                                                     &inode));
2554                         if (!blk)
2555                                 continue;
2556
2557                         ext2fs_file_acl_block_set(fs, &inode, blk);
2558
2559                         /*
2560                          * Write the inode to disk so that inode table
2561                          * resizing can work
2562                          */
2563                         retval = ext2fs_write_inode(fs, ino, &inode);
2564                         if (retval)
2565                                 goto err_out;
2566                 }
2567
2568                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2569                         continue;
2570
2571                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2572                                                process_block, bmap);
2573                 if (retval)
2574                         goto err_out;
2575
2576         }
2577
2578 err_out:
2579         ext2fs_free_mem(&block_buf);
2580         ext2fs_close_inode_scan(scan);
2581
2582         return retval;
2583 }
2584
2585 /*
2586  * We need to scan for inode and block bitmaps that may need to be
2587  * moved.  This can take place if the filesystem was formatted for
2588  * RAID arrays using the mke2fs's extended option "stride".
2589  */
2590 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2591 {
2592         dgrp_t i;
2593         blk64_t blk, new_blk;
2594
2595         for (i = 0; i < fs->group_desc_count; i++) {
2596                 blk = ext2fs_block_bitmap_loc(fs, i);
2597                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2598                         new_blk = translate_block(blk);
2599                         if (!new_blk)
2600                                 continue;
2601                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2602                 }
2603
2604                 blk = ext2fs_inode_bitmap_loc(fs, i);
2605                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2606                         new_blk = translate_block(blk);
2607                         if (!new_blk)
2608                                 continue;
2609                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2610                 }
2611         }
2612         return 0;
2613 }
2614
2615 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2616 {
2617         dgrp_t i;
2618         blk64_t blk;
2619         errcode_t retval;
2620         int new_ino_blks_per_grp;
2621         unsigned int j;
2622         char *old_itable = NULL, *new_itable = NULL;
2623         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2624         unsigned long old_ino_size;
2625         int old_itable_size, new_itable_size;
2626
2627         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2628         old_ino_size = EXT2_INODE_SIZE(fs->super);
2629
2630         new_ino_blks_per_grp = ext2fs_div_ceil(
2631                                         EXT2_INODES_PER_GROUP(fs->super) *
2632                                         new_ino_size,
2633                                         fs->blocksize);
2634
2635         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2636
2637         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2638         if (retval)
2639                 return retval;
2640
2641         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2642         if (retval)
2643                 goto err_out;
2644
2645         tmp_old_itable = old_itable;
2646         tmp_new_itable = new_itable;
2647
2648         for (i = 0; i < fs->group_desc_count; i++) {
2649                 blk = ext2fs_inode_table_loc(fs, i);
2650                 retval = io_channel_read_blk64(fs->io, blk,
2651                                 fs->inode_blocks_per_group, old_itable);
2652                 if (retval)
2653                         goto err_out;
2654
2655                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2656                         memcpy(new_itable, old_itable, old_ino_size);
2657
2658                         memset(new_itable+old_ino_size, 0,
2659                                         new_ino_size - old_ino_size);
2660
2661                         new_itable += new_ino_size;
2662                         old_itable += old_ino_size;
2663                 }
2664
2665                 /* reset the pointer */
2666                 old_itable = tmp_old_itable;
2667                 new_itable = tmp_new_itable;
2668
2669                 retval = io_channel_write_blk64(fs->io, blk,
2670                                         new_ino_blks_per_grp, new_itable);
2671                 if (retval)
2672                         goto err_out;
2673         }
2674
2675         /* Update the meta data */
2676         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2677         ext2fs_free_inode_cache(fs->icache);
2678         fs->icache = 0;
2679         fs->super->s_inode_size = new_ino_size;
2680
2681 err_out:
2682         if (old_itable)
2683                 ext2fs_free_mem(&old_itable);
2684
2685         if (new_itable)
2686                 ext2fs_free_mem(&new_itable);
2687
2688         return retval;
2689 }
2690
2691
2692 #define list_for_each_safe(pos, pnext, head) \
2693         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2694              pos = pnext, pnext = pos->next)
2695
2696 static void free_blk_move_list(void)
2697 {
2698         struct list_head *entry, *tmp;
2699         struct blk_move *bmv;
2700
2701         list_for_each_safe(entry, tmp, &blk_move_list) {
2702                 bmv = list_entry(entry, struct blk_move, list);
2703                 list_del(entry);
2704                 ext2fs_free_mem(&bmv);
2705         }
2706         return;
2707 }
2708
2709 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2710 {
2711         errcode_t retval;
2712         int new_ino_blks_per_grp;
2713         ext2fs_block_bitmap bmap;
2714
2715         retval = ext2fs_read_inode_bitmap(fs);
2716         if (retval) {
2717                 fputs(_("Failed to read inode bitmap\n"), stderr);
2718                 return retval;
2719         }
2720         retval = ext2fs_read_block_bitmap(fs);
2721         if (retval) {
2722                 fputs(_("Failed to read block bitmap\n"), stderr);
2723                 return retval;
2724         }
2725         INIT_LIST_HEAD(&blk_move_list);
2726
2727
2728         new_ino_blks_per_grp = ext2fs_div_ceil(
2729                                         EXT2_INODES_PER_GROUP(fs->super)*
2730                                         new_size,
2731                                         fs->blocksize);
2732
2733         /* We may change the file system.
2734          * Mark the file system as invalid so that
2735          * the user is prompted to run fsck.
2736          */
2737         fs->super->s_state &= ~EXT2_VALID_FS;
2738
2739         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2740                                                 &bmap);
2741         if (retval) {
2742                 fputs(_("Failed to allocate block bitmap when "
2743                                 "increasing inode size\n"), stderr);
2744                 return retval;
2745         }
2746         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2747         if (retval) {
2748                 fputs(_("Not enough space to increase inode size \n"), stderr);
2749                 goto err_out;
2750         }
2751         retval = move_block(fs, bmap);
2752         if (retval) {
2753                 fputs(_("Failed to relocate blocks during inode resize \n"),
2754                       stderr);
2755                 goto err_out;
2756         }
2757         retval = inode_scan_and_fix(fs, bmap);
2758         if (retval)
2759                 goto err_out_undo;
2760
2761         retval = group_desc_scan_and_fix(fs, bmap);
2762         if (retval)
2763                 goto err_out_undo;
2764
2765         retval = expand_inode_table(fs, new_size);
2766         if (retval)
2767                 goto err_out_undo;
2768
2769         ext2fs_calculate_summary_stats(fs, 1 /* super only */);
2770
2771         fs->super->s_state |= EXT2_VALID_FS;
2772         /* mark super block and block bitmap as dirty */
2773         ext2fs_mark_super_dirty(fs);
2774         ext2fs_mark_bb_dirty(fs);
2775
2776 err_out:
2777         free_blk_move_list();
2778         ext2fs_free_block_bitmap(bmap);
2779
2780         return retval;
2781
2782 err_out_undo:
2783         free_blk_move_list();
2784         ext2fs_free_block_bitmap(bmap);
2785         fputs(_("Error in resizing the inode size.\n"
2786                         "Run e2undo to undo the "
2787                         "file system changes. \n"), stderr);
2788
2789         return retval;
2790 }
2791
2792 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2793 {
2794         errcode_t retval = 0;
2795         const char *tdb_dir;
2796         char *tdb_file = NULL;
2797         char *dev_name, *tmp_name;
2798
2799         /* (re)open a specific undo file */
2800         if (undo_file && undo_file[0] != 0) {
2801                 retval = set_undo_io_backing_manager(*io_ptr);
2802                 if (retval)
2803                         goto err;
2804                 *io_ptr = undo_io_manager;
2805                 retval = set_undo_io_backup_file(undo_file);
2806                 if (retval)
2807                         goto err;
2808                 printf(_("Overwriting existing filesystem; this can be undone "
2809                          "using the command:\n"
2810                          "    e2undo %s %s\n\n"),
2811                          undo_file, name);
2812                 return retval;
2813         }
2814
2815         /*
2816          * Configuration via a conf file would be
2817          * nice
2818          */
2819         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2820         if (!tdb_dir)
2821                 tdb_dir = "/var/lib/e2fsprogs";
2822
2823         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2824             access(tdb_dir, W_OK))
2825                 return 0;
2826
2827         tmp_name = strdup(name);
2828         if (!tmp_name)
2829                 goto errout;
2830         dev_name = basename(tmp_name);
2831         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2832         if (!tdb_file) {
2833                 free(tmp_name);
2834                 goto errout;
2835         }
2836         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2837         free(tmp_name);
2838
2839         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2840                 retval = errno;
2841                 com_err(program_name, retval,
2842                         _("while trying to delete %s"), tdb_file);
2843                 goto errout;
2844         }
2845
2846         retval = set_undo_io_backing_manager(*io_ptr);
2847         if (retval)
2848                 goto errout;
2849         *io_ptr = undo_io_manager;
2850         retval = set_undo_io_backup_file(tdb_file);
2851         if (retval)
2852                 goto errout;
2853         printf(_("Overwriting existing filesystem; this can be undone "
2854                  "using the command:\n"
2855                  "    e2undo %s %s\n\n"),
2856                  tdb_file, name);
2857
2858         free(tdb_file);
2859         return 0;
2860 errout:
2861         free(tdb_file);
2862 err:
2863         com_err("tune2fs", retval, "while trying to setup undo file\n");
2864         return retval;
2865 }
2866
2867 static int
2868 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2869 {
2870         int retval, nr_users, start;
2871         journal_superblock_t *jsb;
2872         ext2_filsys jfs;
2873         __u8 *j_uuid;
2874         char *journal_path;
2875         char uuid[UUID_STR_SIZE];
2876         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2877
2878         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2879                 return 0;
2880
2881         uuid_unparse(sb->s_journal_uuid, uuid);
2882         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2883         if (!journal_path)
2884                 return 0;
2885
2886         retval = ext2fs_open2(journal_path, io_options,
2887                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2888                               0, 0, unix_io_manager, &jfs);
2889         if (retval) {
2890                 com_err(program_name, retval,
2891                         _("while trying to open %s"),
2892                         journal_path);
2893                 return retval;
2894         }
2895
2896         retval = get_journal_sb(jfs, buf);
2897         if (retval != 0) {
2898                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2899                         fprintf(stderr, _("%s is not a journal device.\n"),
2900                                 journal_path);
2901                 return retval;
2902         }
2903
2904         jsb = (journal_superblock_t *) buf;
2905         /* Find the filesystem UUID */
2906         nr_users = ntohl(jsb->s_nr_users);
2907         if (nr_users > JBD2_USERS_MAX) {
2908                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2909                                  "is too high (%d).\n"), nr_users);
2910                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2911         }
2912
2913         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2914         if (j_uuid == NULL) {
2915                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2916                       stderr);
2917                 return EXT2_ET_LOAD_EXT_JOURNAL;
2918         }
2919
2920         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2921
2922         start = ext2fs_journal_sb_start(jfs->blocksize);
2923         /* Write back the journal superblock */
2924         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2925         if (retval != 0) {
2926                 com_err(program_name, retval,
2927                         "while writing journal superblock.");
2928                 return retval;
2929         }
2930
2931         ext2fs_close(jfs);
2932
2933         return 0;
2934 }
2935
2936 #ifndef BUILD_AS_LIB
2937 int main(int argc, char **argv)
2938 #else
2939 int tune2fs_main(int argc, char **argv)
2940 #endif  /* BUILD_AS_LIB */
2941 {
2942         errcode_t retval;
2943         ext2_filsys fs;
2944         struct ext2_super_block *sb;
2945         io_manager io_ptr, io_ptr_orig = NULL;
2946         int rc = 0;
2947         char default_undo_file[1] = { 0 };
2948
2949 #ifdef ENABLE_NLS
2950         setlocale(LC_MESSAGES, "");
2951         setlocale(LC_CTYPE, "");
2952         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2953         textdomain(NLS_CAT_NAME);
2954         set_com_err_gettext(gettext);
2955 #endif
2956         if (argc && *argv)
2957                 program_name = *argv;
2958         else
2959                 usage();
2960         add_error_table(&et_ext2_error_table);
2961
2962 #ifdef CONFIG_BUILD_FINDFS
2963         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2964                 do_findfs(argc, argv);
2965 #endif
2966         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2967                 parse_e2label_options(argc, argv);
2968         else
2969                 parse_tune2fs_options(argc, argv);
2970
2971 #ifdef CONFIG_TESTIO_DEBUG
2972         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2973                 io_ptr = test_io_manager;
2974                 test_io_backing_manager = unix_io_manager;
2975         } else
2976 #endif
2977                 io_ptr = unix_io_manager;
2978
2979 retry_open:
2980         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2981                 open_flag |= EXT2_FLAG_SKIP_MMP;
2982
2983         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
2984                 EXT2_FLAG_JOURNAL_DEV_OK;
2985
2986         /* keep the filesystem struct around to dump MMP data */
2987         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2988
2989         retval = ext2fs_open2(device_name, io_options, open_flag,
2990                               0, 0, io_ptr, &fs);
2991         if (retval) {
2992                 com_err(program_name, retval,
2993                         _("while trying to open %s"),
2994                         device_name);
2995                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2996                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2997                         dump_mmp_msg(fs->mmp_buf,
2998                                      _("If you are sure the filesystem "
2999                                        "is not in use on any node, run:\n"
3000                                        "'tune2fs -f -E clear_mmp {device}'\n"));
3001                 else if (retval == EXT2_ET_MMP_FAILED)
3002                         dump_mmp_msg(fs->mmp_buf, NULL);
3003                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
3004                         fprintf(stderr,
3005                                 _("MMP block magic is bad. Try to fix it by "
3006                                   "running:\n'e2fsck -f %s'\n"), device_name);
3007                 else if (retval == EXT2_ET_BAD_MAGIC)
3008                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
3009                 else if (retval != EXT2_ET_MMP_FAILED)
3010                         fprintf(stderr, "%s",
3011                              _("Couldn't find valid filesystem superblock.\n"));
3012
3013                 ext2fs_free(fs);
3014                 exit(1);
3015         }
3016         if (ext2fs_has_feature_journal_dev(fs->super)) {
3017                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
3018                 ext2fs_free(fs);
3019                 exit(1);
3020         }
3021         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
3022
3023         if (I_flag) {
3024                 /*
3025                  * Check the inode size is right so we can issue an
3026                  * error message and bail before setting up the tdb
3027                  * file.
3028                  */
3029                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
3030                         fprintf(stderr, _("The inode size is already %lu\n"),
3031                                 new_inode_size);
3032                         rc = 1;
3033                         goto closefs;
3034                 }
3035                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3036                         fprintf(stderr, "%s",
3037                                 _("Shrinking inode size is not supported\n"));
3038                         rc = 1;
3039                         goto closefs;
3040                 }
3041                 if (new_inode_size > fs->blocksize) {
3042                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3043                                 new_inode_size, fs->blocksize);
3044                         rc = 1;
3045                         goto closefs;
3046                 }
3047                 rc = check_fsck_needed(fs,
3048                         _("Resizing inodes could take some time."));
3049                 if (rc)
3050                         goto closefs;
3051                 /*
3052                  * If inode resize is requested use the
3053                  * Undo I/O manager
3054                  */
3055                 undo_file = default_undo_file;
3056         }
3057
3058         /* Set up an undo file */
3059         if (undo_file && io_ptr_orig == NULL) {
3060                 io_ptr_orig = io_ptr;
3061                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3062                 if (retval) {
3063                         rc = 1;
3064                         goto closefs;
3065                 }
3066                 if (io_ptr != io_ptr_orig) {
3067                         ext2fs_close_free(&fs);
3068                         goto retry_open;
3069                 }
3070         }
3071
3072         sb = fs->super;
3073         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3074
3075         if (print_label) {
3076                 /* For e2label emulation */
3077                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3078                 remove_error_table(&et_ext2_error_table);
3079                 goto closefs;
3080         }
3081
3082         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3083         if (retval) {
3084                 com_err("ext2fs_check_if_mount", retval,
3085                         _("while determining whether %s is mounted."),
3086                         device_name);
3087                 rc = 1;
3088                 goto closefs;
3089         }
3090
3091 #ifdef NO_RECOVERY
3092         /* Warn if file system needs recovery and it is opened for writing. */
3093         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3094             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3095             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3096                 fprintf(stderr,
3097 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3098   "\te2fsck -E journal_only %s\n\n"
3099   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3100   "by journal recovery.\n"), device_name);
3101         }
3102 #else
3103         /* Recover the journal if possible. */
3104         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3105             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3106                 printf(_("Recovering journal.\n"));
3107                 retval = ext2fs_run_ext3_journal(&fs);
3108                 if (retval) {
3109                         com_err("tune2fs", retval,
3110                                 "while recovering journal.\n");
3111                         printf(_("Please run e2fsck -fy %s.\n"), device_name);
3112                         if (!fs)
3113                                 exit(1);
3114                         rc = 1;
3115                         goto closefs;
3116                 }
3117                 sb = fs->super;
3118         }
3119 #endif
3120
3121         /* Normally we only need to write out the superblock */
3122         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3123
3124         if (c_flag) {
3125                 if (max_mount_count == 65536)
3126                         max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
3127                                 (random() % EXT2_DFL_MAX_MNT_COUNT);
3128                 sb->s_max_mnt_count = max_mount_count;
3129                 ext2fs_mark_super_dirty(fs);
3130                 printf(_("Setting maximal mount count to %d\n"),
3131                        max_mount_count);
3132         }
3133         if (C_flag) {
3134                 sb->s_mnt_count = mount_count;
3135                 ext2fs_mark_super_dirty(fs);
3136                 printf(_("Setting current mount count to %d\n"), mount_count);
3137         }
3138         if (e_flag) {
3139                 sb->s_errors = errors;
3140                 ext2fs_mark_super_dirty(fs);
3141                 printf(_("Setting error behavior to %d\n"), errors);
3142         }
3143         if (g_flag) {
3144                 sb->s_def_resgid = resgid;
3145                 ext2fs_mark_super_dirty(fs);
3146                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3147         }
3148         if (i_flag) {
3149                 if ((unsigned long long)interval >= (1ULL << 32)) {
3150                         com_err(program_name, 0,
3151                                 _("interval between checks is too big (%lu)"),
3152                                 interval);
3153                         rc = 1;
3154                         goto closefs;
3155                 }
3156                 sb->s_checkinterval = interval;
3157                 ext2fs_mark_super_dirty(fs);
3158                 printf(_("Setting interval between checks to %lu seconds\n"),
3159                        interval);
3160         }
3161         if (m_flag) {
3162                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3163                                           ext2fs_blocks_count(sb) / 100.0);
3164                 ext2fs_mark_super_dirty(fs);
3165                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3166                         reserved_ratio,
3167                         (unsigned long long) ext2fs_r_blocks_count(sb));
3168         }
3169         if (r_flag) {
3170                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3171                         com_err(program_name, 0,
3172                                 _("reserved blocks count is too big (%llu)"),
3173                                 (unsigned long long) reserved_blocks);
3174                         rc = 1;
3175                         goto closefs;
3176                 }
3177                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3178                 ext2fs_mark_super_dirty(fs);
3179                 printf(_("Setting reserved blocks count to %llu\n"),
3180                        (unsigned long long) reserved_blocks);
3181         }
3182         if (s_flag == 1) {
3183                 if (ext2fs_has_feature_sparse_super(sb)) {
3184                         fputs(_("\nThe filesystem already has sparse "
3185                                 "superblocks.\n"), stderr);
3186                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3187                         fputs(_("\nSetting the sparse superblock flag not "
3188                                 "supported\nfor filesystems with "
3189                                 "the meta_bg feature enabled.\n"),
3190                                 stderr);
3191                         rc = 1;
3192                         goto closefs;
3193                 } else {
3194                         ext2fs_set_feature_sparse_super(sb);
3195                         sb->s_state &= ~EXT2_VALID_FS;
3196                         ext2fs_mark_super_dirty(fs);
3197                         printf(_("\nSparse superblock flag set.  %s"),
3198                                _(please_fsck));
3199                 }
3200         }
3201         if (s_flag == 0) {
3202                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3203                       stderr);
3204                 rc = 1;
3205                 goto closefs;
3206         }
3207         if (T_flag) {
3208                 sb->s_lastcheck = last_check_time;
3209                 ext2fs_mark_super_dirty(fs);
3210                 printf(_("Setting time filesystem last checked to %s\n"),
3211                        ctime(&last_check_time));
3212         }
3213         if (u_flag) {
3214                 sb->s_def_resuid = resuid;
3215                 ext2fs_mark_super_dirty(fs);
3216                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3217         }
3218         if (L_flag) {
3219                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3220                         fputs(_("Warning: label too long, truncating.\n"),
3221                               stderr);
3222                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3223                 strncpy((char *)sb->s_volume_name, new_label,
3224                         sizeof(sb->s_volume_name));
3225                 ext2fs_mark_super_dirty(fs);
3226         }
3227         if (M_flag) {
3228                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3229                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3230                         sizeof(sb->s_last_mounted));
3231                 ext2fs_mark_super_dirty(fs);
3232         }
3233         if (mntopts_cmd) {
3234                 rc = update_mntopts(fs, mntopts_cmd);
3235                 if (rc)
3236                         goto closefs;
3237         }
3238         if (features_cmd) {
3239                 rc = update_feature_set(fs, features_cmd);
3240                 if (rc)
3241                         goto closefs;
3242         }
3243         if (extended_cmd) {
3244                 rc = parse_extended_opts(fs, extended_cmd);
3245                 if (rc)
3246                         goto closefs;
3247                 if (clear_mmp && !f_flag) {
3248                         fputs(_("Error in using clear_mmp. "
3249                                 "It must be used with -f\n"),
3250                               stderr);
3251                         rc = 1;
3252                         goto closefs;
3253                 }
3254         }
3255         if (clear_mmp) {
3256                 rc = ext2fs_mmp_clear(fs);
3257                 goto closefs;
3258         }
3259         if (journal_size || journal_device) {
3260                 rc = add_journal(fs);
3261                 if (rc)
3262                         goto closefs;
3263         }
3264
3265         if (Q_flag) {
3266                 if (mount_flags & EXT2_MF_MOUNTED) {
3267                         fputs(_("The quota feature may only be changed when "
3268                                 "the filesystem is unmounted.\n"), stderr);
3269                         rc = 1;
3270                         goto closefs;
3271                 }
3272                 rc = handle_quota_options(fs);
3273                 if (rc)
3274                         goto closefs;
3275         }
3276
3277         if (U_flag) {
3278                 int set_csum = 0;
3279                 dgrp_t i;
3280                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3281                 __u8 old_uuid[UUID_SIZE];
3282
3283                 if (ext2fs_has_feature_stable_inodes(fs->super)) {
3284                         fputs(_("Cannot change the UUID of this filesystem "
3285                                 "because it has the stable_inodes feature "
3286                                 "flag.\n"), stderr);
3287                         exit(1);
3288                 }
3289
3290                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3291                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3292                      ext2fs_has_feature_ea_inode(fs->super))) {
3293                         rc = check_fsck_needed(fs,
3294                                 _("Setting the UUID on this "
3295                                   "filesystem could take some time."));
3296                         if (rc)
3297                                 goto closefs;
3298                         rewrite_checksums = REWRITE_ALL;
3299                 }
3300
3301                 if (ext2fs_has_group_desc_csum(fs)) {
3302                         /*
3303                          * Changing the UUID on a metadata_csum FS requires
3304                          * rewriting all metadata, which can race with a
3305                          * mounted fs.  Don't allow that unless we're saving
3306                          * the checksum seed.
3307                          */
3308                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3309                             !ext2fs_has_feature_csum_seed(fs->super) &&
3310                             ext2fs_has_feature_metadata_csum(fs->super)) {
3311                                 fputs(_("The UUID may only be "
3312                                         "changed when the filesystem is "
3313                                         "unmounted.\n"), stderr);
3314                                 fputs(_("If you only use kernels newer than "
3315                                         "v4.4, run 'tune2fs -O "
3316                                         "metadata_csum_seed' and re-run this "
3317                                         "command.\n"), stderr);
3318                                 try_confirm_csum_seed_support();
3319                                 rc = 1;
3320                                 goto closefs;
3321                         }
3322
3323                         /*
3324                          * Determine if the block group checksums are
3325                          * correct so we know whether or not to set
3326                          * them later on.
3327                          */
3328                         for (i = 0; i < fs->group_desc_count; i++)
3329                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3330                                         break;
3331                         if (i >= fs->group_desc_count)
3332                                 set_csum = 1;
3333                 }
3334
3335                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3336                 if ((strcasecmp(new_UUID, "null") == 0) ||
3337                     (strcasecmp(new_UUID, "clear") == 0)) {
3338                         uuid_clear(sb->s_uuid);
3339                 } else if (strcasecmp(new_UUID, "time") == 0) {
3340                         uuid_generate_time(sb->s_uuid);
3341                 } else if (strcasecmp(new_UUID, "random") == 0) {
3342                         uuid_generate(sb->s_uuid);
3343                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3344                         com_err(program_name, 0, "%s",
3345                                 _("Invalid UUID format\n"));
3346                         rc = 1;
3347                         goto closefs;
3348                 }
3349                 ext2fs_init_csum_seed(fs);
3350                 if (set_csum) {
3351                         for (i = 0; i < fs->group_desc_count; i++)
3352                                 ext2fs_group_desc_csum_set(fs, i);
3353                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3354                 }
3355
3356                 /* If this is a journal dev, we need to copy UUID into jsb */
3357                 if (!(rc = get_journal_sb(fs, buf))) {
3358                         journal_superblock_t *jsb;
3359
3360                         jsb = (journal_superblock_t *) buf;
3361                         fputs(_("Need to update journal superblock.\n"), stdout);
3362                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3363
3364                         /* Writeback the journal superblock */
3365                         if ((rc = io_channel_write_blk64(fs->io,
3366                                 ext2fs_journal_sb_start(fs->blocksize),
3367                                         -SUPERBLOCK_SIZE, buf)))
3368                                 goto closefs;
3369                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3370                         goto closefs;
3371                 else {
3372                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3373
3374                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3375                                 goto closefs;
3376                 }
3377
3378                 ext2fs_mark_super_dirty(fs);
3379         }
3380
3381         if (I_flag) {
3382                 if (mount_flags & EXT2_MF_MOUNTED) {
3383                         fputs(_("The inode size may only be "
3384                                 "changed when the filesystem is "
3385                                 "unmounted.\n"), stderr);
3386                         rc = 1;
3387                         goto closefs;
3388                 }
3389                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3390                         fputs(_("Changing the inode size not supported for "
3391                                 "filesystems with the flex_bg\n"
3392                                 "feature enabled.\n"),
3393                               stderr);
3394                         rc = 1;
3395                         goto closefs;
3396                 }
3397                 /*
3398                  * We want to update group descriptor also
3399                  * with the new free inode count
3400                  */
3401                 if (rewrite_checksums)
3402                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3403                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3404                 retval = resize_inode(fs, new_inode_size);
3405                 if (rewrite_checksums)
3406                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3407                 if (retval == 0) {
3408                         printf(_("Setting inode size %lu\n"),
3409                                                         new_inode_size);
3410                         rewrite_checksums = REWRITE_ALL;
3411                 } else {
3412                         printf("%s", _("Failed to change inode size\n"));
3413                         rc = 1;
3414                         goto closefs;
3415                 }
3416         }
3417
3418         if (rewrite_checksums) {
3419                 retval = rewrite_metadata_checksums(fs, rewrite_checksums);
3420                 if (retval != 0) {
3421                         printf("Failed to rewrite metadata checksums\n");
3422                         rc = 1;
3423                         goto closefs;
3424                 }
3425         }
3426
3427         if (l_flag)
3428                 list_super(sb);
3429         if (stride_set) {
3430                 sb->s_raid_stride = stride;
3431                 ext2fs_mark_super_dirty(fs);
3432                 printf(_("Setting stride size to %d\n"), stride);
3433         }
3434         if (stripe_width_set) {
3435                 sb->s_raid_stripe_width = stripe_width;
3436                 ext2fs_mark_super_dirty(fs);
3437                 printf(_("Setting stripe width to %d\n"), stripe_width);
3438         }
3439         if (ext_mount_opts) {
3440                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3441                         sizeof(fs->super->s_mount_opts));
3442                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3443                 ext2fs_mark_super_dirty(fs);
3444                 printf(_("Setting extended default mount options to '%s'\n"),
3445                        ext_mount_opts);
3446                 free(ext_mount_opts);
3447         }
3448
3449         free(device_name);
3450         remove_error_table(&et_ext2_error_table);
3451
3452 closefs:
3453         if (rc) {
3454                 ext2fs_mmp_stop(fs);
3455 #ifndef BUILD_AS_LIB
3456                 exit(1);
3457 #endif
3458         }
3459
3460         if (feature_64bit)
3461                 convert_64bit(fs, feature_64bit);
3462
3463         retval = ext2fs_close_free(&fs);
3464         if (retval) {
3465                 com_err("tune2fs", retval,
3466                         _("while writing out and closing file system"));
3467                 rc = 1;
3468         }
3469
3470         return rc;
3471 }