misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104
 105 int journal_size, journal_flags;
 106 char *journal_device;
 107 static blk64_t journal_location = ~0LL;
 108
 109 static struct list_head blk_move_list;
 110
 111 struct blk_move {
 112         struct list_head list;
 113         blk64_t old_loc;
 114         blk64_t new_loc;
 115 };
 116
 117 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 118
 119 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 120
 121 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 122 static const char *please_dir_fsck =
 123                 N_("Please run e2fsck -fD on the filesystem.\n");
 124
 125 #ifdef CONFIG_BUILD_FINDFS
 126 void do_findfs(int argc, char **argv);
 127 #endif
 128
 129 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 130 int journal_enable_debug = -1;
 131 #endif
 132
 133 static void usage(void)
 134 {
 135         fprintf(stderr,
 136                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 137                   "[-g group]\n"
 138                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 139                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 140                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 141                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 142                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 143                   "\t[-E extended-option[,...]] [-T last_check_time] "
 144                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 145                 program_name);
 146         exit(1);
 147 }
 148
 149 static __u32 ok_features[3] = {
 150         /* Compat */
 151         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 152                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 153         /* Incompat */
 154         EXT2_FEATURE_INCOMPAT_FILETYPE |
 155                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 156                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 157                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 158                 EXT4_FEATURE_INCOMPAT_MMP |
 159                 EXT4_FEATURE_INCOMPAT_64BIT |
 160                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 161                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 162                 EXT4_FEATURE_INCOMPAT_LARGEDIR,
 163         /* R/O compat */
 164         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 165                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 166                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 167                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 168                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 169                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 170                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 171                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 172                 EXT4_FEATURE_RO_COMPAT_READONLY |
 173                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 174                 EXT4_FEATURE_RO_COMPAT_VERITY
 175 };
 176
 177 static __u32 clear_ok_features[3] = {
 178         /* Compat */
 179         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 180                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 181                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 182         /* Incompat */
 183         EXT2_FEATURE_INCOMPAT_FILETYPE |
 184                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 185                 EXT4_FEATURE_INCOMPAT_MMP |
 186                 EXT4_FEATURE_INCOMPAT_64BIT |
 187                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 188         /* R/O compat */
 189         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 190                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 191                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 192                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 193                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 194                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 195                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 196                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 197                 EXT4_FEATURE_RO_COMPAT_READONLY
 198 };
 199
 200 /**
 201  * Try to get journal super block if any
 202  */
 203 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 204 {
 205         int retval;
 206         journal_superblock_t *jsb;
 207
 208         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 209                 return EXT2_ET_UNSUPP_FEATURE;
 210         }
 211
 212         /* Get the journal superblock */
 213         if ((retval = io_channel_read_blk64(jfs->io,
 214             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 215                 com_err(program_name, retval, "%s",
 216                 _("while reading journal superblock"));
 217                 return retval;
 218         }
 219
 220         jsb = (journal_superblock_t *) buf;
 221         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 222             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 223                 fputs(_("Journal superblock not found!\n"), stderr);
 224                 return EXT2_ET_BAD_MAGIC;
 225         }
 226
 227         return 0;
 228 }
 229
 230 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 231                           int nr_users)
 232 {
 233         int i;
 234         for (i = 0; i < nr_users; i++) {
 235                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 236                         return &s_users[i * UUID_SIZE];
 237         }
 238
 239         return NULL;
 240 }
 241
 242 /*
 243  * Remove an external journal from the filesystem
 244  */
 245 static int remove_journal_device(ext2_filsys fs)
 246 {
 247         char            *journal_path;
 248         ext2_filsys     jfs;
 249         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 250         journal_superblock_t    *jsb;
 251         int             i, nr_users;
 252         errcode_t       retval;
 253         int             commit_remove_journal = 0;
 254         io_manager      io_ptr;
 255
 256         if (f_flag)
 257                 commit_remove_journal = 1; /* force removal even if error */
 258
 259         uuid_unparse(fs->super->s_journal_uuid, buf);
 260         journal_path = blkid_get_devname(NULL, "UUID", buf);
 261
 262         if (!journal_path) {
 263                 journal_path =
 264                         ext2fs_find_block_device(fs->super->s_journal_dev);
 265                 if (!journal_path)
 266                         goto no_valid_journal;
 267         }
 268
 269 #ifdef CONFIG_TESTIO_DEBUG
 270         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 271                 io_ptr = test_io_manager;
 272                 test_io_backing_manager = unix_io_manager;
 273         } else
 274 #endif
 275                 io_ptr = unix_io_manager;
 276         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 277                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 278                              fs->blocksize, io_ptr, &jfs);
 279         if (retval) {
 280                 com_err(program_name, retval, "%s",
 281                         _("while trying to open external journal"));
 282                 goto no_valid_journal;
 283         }
 284
 285         if ((retval = get_journal_sb(jfs, buf))) {
 286                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 287                         fprintf(stderr, _("%s is not a journal device.\n"),
 288                                 journal_path);
 289                 goto no_valid_journal;
 290         }
 291
 292         jsb = (journal_superblock_t *) buf;
 293         /* Find the filesystem UUID */
 294         nr_users = ntohl(jsb->s_nr_users);
 295         if (nr_users > JFS_USERS_MAX) {
 296                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 297                                  "is too high (%d).\n"), nr_users);
 298                 commit_remove_journal = 1;
 299                 goto no_valid_journal;
 300         }
 301
 302         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 303                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 304                       stderr);
 305                 commit_remove_journal = 1;
 306                 goto no_valid_journal;
 307         }
 308         nr_users--;
 309         for (i = 0; i < nr_users; i++)
 310                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 311         jsb->s_nr_users = htonl(nr_users);
 312
 313         /* Write back the journal superblock */
 314         retval = io_channel_write_blk64(jfs->io,
 315                                         ext2fs_journal_sb_start(fs->blocksize),
 316                                         -SUPERBLOCK_SIZE, buf);
 317         if (retval) {
 318                 com_err(program_name, retval,
 319                         "while writing journal superblock.");
 320                 goto no_valid_journal;
 321         }
 322
 323         commit_remove_journal = 1;
 324
 325 no_valid_journal:
 326         if (commit_remove_journal == 0) {
 327                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 328                         "Use -f option to remove missing journal device.\n"),
 329                       stderr);
 330                 return 1;
 331         }
 332         fs->super->s_journal_dev = 0;
 333         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 334         uuid_clear(fs->super->s_journal_uuid);
 335         ext2fs_mark_super_dirty(fs);
 336         fputs(_("Journal removed\n"), stdout);
 337         free(journal_path);
 338
 339         return 0;
 340 }
 341
 342 /* Helper function for remove_journal_inode */
 343 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 344                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 345                                blk64_t ref_block EXT2FS_ATTR((unused)),
 346                                int ref_offset EXT2FS_ATTR((unused)),
 347                                void *private EXT2FS_ATTR((unused)))
 348 {
 349         blk64_t block;
 350         int     group;
 351
 352         block = *blocknr;
 353         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 354         group = ext2fs_group_of_blk2(fs, block);
 355         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 356         ext2fs_group_desc_csum_set(fs, group);
 357         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 358         return 0;
 359 }
 360
 361 /*
 362  * Remove the journal inode from the filesystem
 363  */
 364 static errcode_t remove_journal_inode(ext2_filsys fs)
 365 {
 366         struct ext2_inode       inode;
 367         errcode_t               retval;
 368         ext2_ino_t              ino = fs->super->s_journal_inum;
 369
 370         retval = ext2fs_read_inode(fs, ino,  &inode);
 371         if (retval) {
 372                 com_err(program_name, retval, "%s",
 373                         _("while reading journal inode"));
 374                 return retval;
 375         }
 376         if (ino == EXT2_JOURNAL_INO) {
 377                 retval = ext2fs_read_bitmaps(fs);
 378                 if (retval) {
 379                         com_err(program_name, retval, "%s",
 380                                 _("while reading bitmaps"));
 381                         return retval;
 382                 }
 383                 retval = ext2fs_block_iterate3(fs, ino,
 384                                                BLOCK_FLAG_READ_ONLY, NULL,
 385                                                release_blocks_proc, NULL);
 386                 if (retval) {
 387                         com_err(program_name, retval, "%s",
 388                                 _("while clearing journal inode"));
 389                         return retval;
 390                 }
 391                 memset(&inode, 0, sizeof(inode));
 392                 ext2fs_mark_bb_dirty(fs);
 393                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 394         } else
 395                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 396         retval = ext2fs_write_inode(fs, ino, &inode);
 397         if (retval) {
 398                 com_err(program_name, retval, "%s",
 399                         _("while writing journal inode"));
 400                 return retval;
 401         }
 402         fs->super->s_journal_inum = 0;
 403         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 404         ext2fs_mark_super_dirty(fs);
 405
 406         return 0;
 407 }
 408
 409 /*
 410  * Update the default mount options
 411  */
 412 static int update_mntopts(ext2_filsys fs, char *mntopts)
 413 {
 414         struct ext2_super_block *sb = fs->super;
 415
 416         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 417                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 418                         mntopts);
 419                 return 1;
 420         }
 421         ext2fs_mark_super_dirty(fs);
 422
 423         return 0;
 424 }
 425
 426 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 427 {
 428         /* Refuse to modify anything but a freshly checked valid filesystem. */
 429         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 430             (fs->super->s_state & EXT2_ERROR_FS) ||
 431             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 432                 puts(_(fsck_explain));
 433                 puts(_(please_fsck));
 434                 if (mount_flags & EXT2_MF_READONLY)
 435                         printf("%s", _("(and reboot afterwards!)\n"));
 436                 return 1;
 437         }
 438
 439         /* Give the admin a few seconds to bail out of a dangerous op. */
 440         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 441                 return 0;
 442
 443         puts(prompt);
 444         proceed_question(5);
 445
 446         return 0;
 447 }
 448
 449 static void request_dir_fsck_afterwards(ext2_filsys fs)
 450 {
 451         static int requested;
 452
 453         if (requested++)
 454                 return;
 455         fsck_requested++;
 456         fs->super->s_state &= ~EXT2_VALID_FS;
 457         puts(_(fsck_explain));
 458         puts(_(please_dir_fsck));
 459         if (mount_flags & EXT2_MF_READONLY)
 460                 printf("%s", _("(and reboot afterwards!)\n"));
 461 }
 462
 463 static void request_fsck_afterwards(ext2_filsys fs)
 464 {
 465         static int requested = 0;
 466
 467         if (requested++)
 468                 return;
 469         fsck_requested++;
 470         fs->super->s_state &= ~EXT2_VALID_FS;
 471         printf("\n%s\n", _(please_fsck));
 472         if (mount_flags & EXT2_MF_READONLY)
 473                 printf("%s", _("(and reboot afterwards!)\n"));
 474 }
 475
 476 static void convert_64bit(ext2_filsys fs, int direction)
 477 {
 478         /*
 479          * Is resize2fs going to demand a fsck run? Might as well tell the
 480          * user now.
 481          */
 482         if (!fsck_requested &&
 483             ((fs->super->s_state & EXT2_ERROR_FS) ||
 484              !(fs->super->s_state & EXT2_VALID_FS) ||
 485              fs->super->s_lastcheck < fs->super->s_mtime))
 486                 request_fsck_afterwards(fs);
 487         if (fsck_requested)
 488                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 489                         direction > 0 ? "-b" : "-s", fs->device_name);
 490         else
 491                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 492                         direction > 0 ? "-b" : "-s", fs->device_name);
 493
 494         if (undo_file)
 495                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 496         if (direction > 0)
 497                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 498         else
 499                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 500 }
 501
 502 /*
 503  * Rewrite directory blocks with checksums
 504  */
 505 struct rewrite_dir_context {
 506         char *buf;
 507         errcode_t errcode;
 508         ext2_ino_t dir;
 509         int is_htree;
 510 };
 511
 512 static int rewrite_dir_block(ext2_filsys fs,
 513                              blk64_t    *blocknr,
 514                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 515                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 516                              int        ref_offset EXT2FS_ATTR((unused)),
 517                              void       *priv_data)
 518 {
 519         struct ext2_dx_countlimit *dcl = NULL;
 520         struct rewrite_dir_context *ctx = priv_data;
 521         int dcl_offset, changed = 0;
 522
 523         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 524                                               ctx->dir);
 525         if (ctx->errcode)
 526                 return BLOCK_ABORT;
 527
 528         /* if htree node... */
 529         if (ctx->is_htree)
 530                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 531                                          &dcl, &dcl_offset);
 532         if (dcl) {
 533                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 534                         /* Ensure limit is the max size */
 535                         int max_entries = (fs->blocksize - dcl_offset) /
 536                                           sizeof(struct ext2_dx_entry);
 537                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 538                                 changed = 1;
 539                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 540                         }
 541                 } else {
 542                         /* If htree block is full then rebuild the dir */
 543                         if (ext2fs_le16_to_cpu(dcl->count) ==
 544                             ext2fs_le16_to_cpu(dcl->limit)) {
 545                                 request_dir_fsck_afterwards(fs);
 546                                 return 0;
 547                         }
 548                         /*
 549                          * Ensure dcl->limit is small enough to leave room for
 550                          * the checksum tail.
 551                          */
 552                         int max_entries = (fs->blocksize - (dcl_offset +
 553                                                 sizeof(struct ext2_dx_tail))) /
 554                                           sizeof(struct ext2_dx_entry);
 555                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 556                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 557                         /* Always rewrite checksum */
 558                         changed = 1;
 559                 }
 560         } else {
 561                 unsigned int rec_len, name_size;
 562                 char *top = ctx->buf + fs->blocksize;
 563                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 564                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 565
 566                 /* Find last and penultimate dirent */
 567                 while ((char *)de < top) {
 568                         penultimate_de = last_de;
 569                         last_de = de;
 570                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 571                         if (!ctx->errcode && !rec_len)
 572                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 573                         if (ctx->errcode)
 574                                 return BLOCK_ABORT;
 575                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 576                 }
 577                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 578                 if (ctx->errcode)
 579                         return BLOCK_ABORT;
 580                 name_size = ext2fs_dirent_name_len(last_de);
 581
 582                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 583                         if (!penultimate_de)
 584                                 return 0;
 585                         if (last_de->inode ||
 586                             name_size ||
 587                             rec_len != sizeof(struct ext2_dir_entry_tail))
 588                                 return 0;
 589                         /*
 590                          * The last dirent is unused and the right length to
 591                          * have stored a checksum.  Erase it.
 592                          */
 593                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 594                                                           &rec_len);
 595                         if (!rec_len)
 596                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 597                         if (ctx->errcode)
 598                                 return BLOCK_ABORT;
 599                         ext2fs_set_rec_len(fs, rec_len +
 600                                         sizeof(struct ext2_dir_entry_tail),
 601                                         penultimate_de);
 602                         changed = 1;
 603                 } else {
 604                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 605                         struct ext2_dir_entry_tail *t;
 606
 607                         /*
 608                          * If the last dirent looks like the tail, just update
 609                          * the checksum.
 610                          */
 611                         if (!last_de->inode &&
 612                             rec_len == csum_size) {
 613                                 t = (struct ext2_dir_entry_tail *)last_de;
 614                                 t->det_reserved_name_len =
 615                                                 EXT2_DIR_NAME_LEN_CSUM;
 616                                 changed = 1;
 617                                 goto out;
 618                         }
 619                         if (name_size & 3)
 620                                 name_size = (name_size & ~3) + 4;
 621                         /* If there's not enough space for the tail, e2fsck */
 622                         if (rec_len <= (8 + name_size + csum_size)) {
 623                                 request_dir_fsck_afterwards(fs);
 624                                 return 0;
 625                         }
 626                         /* Shorten that last de and insert the tail */
 627                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 628                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 629                         ext2fs_initialize_dirent_tail(fs, t);
 630
 631                         /* Always update checksum */
 632                         changed = 1;
 633                 }
 634         }
 635
 636 out:
 637         if (!changed)
 638                 return 0;
 639
 640         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 641                                                0, ctx->dir);
 642         if (ctx->errcode)
 643                 return BLOCK_ABORT;
 644
 645         return 0;
 646 }
 647
 648 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 649                                    struct ext2_inode *inode)
 650 {
 651         errcode_t       retval;
 652         struct rewrite_dir_context ctx;
 653
 654         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 655         if (retval)
 656                 return retval;
 657
 658         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 659         ctx.dir = dir;
 660         ctx.errcode = 0;
 661         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 662                                                 BLOCK_FLAG_DATA_ONLY,
 663                                        0, rewrite_dir_block, &ctx);
 664
 665         ext2fs_free_mem(&ctx.buf);
 666         if (retval)
 667                 return retval;
 668
 669         return ctx.errcode;
 670 }
 671
 672 /*
 673  * Context information that does not change across rewrite_one_inode()
 674  * invocations.
 675  */
 676 struct rewrite_context {
 677         ext2_filsys fs;
 678         struct ext2_inode *zero_inode;
 679         char *ea_buf;
 680         int inode_size;
 681 };
 682
 683 #define fatal_err(code, args...)                \
 684         do {                                    \
 685                 com_err(__func__, code, args);  \
 686                 exit(1);                        \
 687         } while (0);
 688
 689 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 690                                  struct ext2_inode *inode)
 691 {
 692         errcode_t retval;
 693         ext2_file_t file;
 694         __u32 hash;
 695
 696         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 697         if (retval)
 698                 fatal_err(retval, "open ea_inode");
 699         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 700                                   NULL);
 701         if (retval)
 702                 fatal_err(retval, "read ea_inode");
 703         retval = ext2fs_file_close(file);
 704         if (retval)
 705                 fatal_err(retval, "close ea_inode");
 706
 707         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 708                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 709         ext2fs_set_ea_inode_hash(inode, hash);
 710 }
 711
 712 static int update_xattr_entry_hashes(ext2_filsys fs,
 713                                      struct ext2_ext_attr_entry *entry,
 714                                      struct ext2_ext_attr_entry *end)
 715 {
 716         int modified = 0;
 717         errcode_t retval;
 718
 719         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 720                 if (entry->e_value_inum) {
 721                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 722                                                              &entry->e_hash);
 723                         if (retval)
 724                                 fatal_err(retval, "hash ea_inode entry");
 725                         modified = 1;
 726                 }
 727                 entry = EXT2_EXT_ATTR_NEXT(entry);
 728         }
 729         return modified;
 730 }
 731
 732 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 733                                        struct ext2_inode_large *inode)
 734 {
 735         struct ext2_ext_attr_entry *start, *end;
 736         __u32 *ea_magic;
 737
 738         if (inode->i_extra_isize == 0)
 739                 return;
 740
 741         if (inode->i_extra_isize & 3 ||
 742             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 743                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 744
 745         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 746                                 inode->i_extra_isize);
 747         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 748                 return;
 749
 750         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 751         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 752
 753         update_xattr_entry_hashes(ctx->fs, start, end);
 754 }
 755
 756 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 757                                       char *block_buf)
 758 {
 759         struct ext2_ext_attr_header *header;
 760         struct ext2_ext_attr_entry *start, *end;
 761
 762         header = (struct ext2_ext_attr_header *)block_buf;
 763         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 764                 return;
 765
 766         start = (struct ext2_ext_attr_entry *)(header+1);
 767         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 768
 769         if (update_xattr_entry_hashes(ctx->fs, start, end))
 770                 ext2fs_ext_attr_block_rehash(header, end);
 771 }
 772
 773 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 774                               struct ext2_inode *inode)
 775 {
 776         blk64_t file_acl_block;
 777         errcode_t retval;
 778
 779         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 780                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 781                         return;
 782                 memset(inode, 0, ctx->inode_size);
 783         }
 784
 785         if (inode->i_flags & EXT4_EA_INODE_FL)
 786                 update_ea_inode_hash(ctx, ino, inode);
 787
 788         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 789                 update_inline_xattr_hashes(ctx,
 790                                            (struct ext2_inode_large *)inode);
 791
 792         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 793         if (retval)
 794                 fatal_err(retval, "while writing inode");
 795
 796         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 797         if (retval)
 798                 fatal_err(retval, "while rewriting extents");
 799
 800         if (LINUX_S_ISDIR(inode->i_mode) &&
 801             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 802                 retval = rewrite_directory(ctx->fs, ino, inode);
 803                 if (retval)
 804                         fatal_err(retval, "while rewriting directories");
 805         }
 806
 807         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 808         if (!file_acl_block)
 809                 return;
 810
 811         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 812                                        ino);
 813         if (retval)
 814                 fatal_err(retval, "while rewriting extended attribute");
 815
 816         update_block_xattr_hashes(ctx, ctx->ea_buf);
 817         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 818                                         ino);
 819         if (retval)
 820                 fatal_err(retval, "while rewriting extended attribute");
 821 }
 822
 823 /*
 824  * Forcibly set checksums in all inodes.
 825  */
 826 static void rewrite_inodes(ext2_filsys fs)
 827 {
 828         ext2_inode_scan scan;
 829         errcode_t       retval;
 830         ext2_ino_t      ino;
 831         struct ext2_inode *inode;
 832         int pass;
 833         struct rewrite_context ctx = {
 834                 .fs = fs,
 835                 .inode_size = EXT2_INODE_SIZE(fs->super),
 836         };
 837
 838         if (fs->super->s_creator_os == EXT2_OS_HURD)
 839                 return;
 840
 841         retval = ext2fs_get_mem(ctx.inode_size, &inode);
 842         if (retval)
 843                 fatal_err(retval, "while allocating memory");
 844
 845         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 846         if (retval)
 847                 fatal_err(retval, "while allocating memory");
 848
 849         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 850         if (retval)
 851                 fatal_err(retval, "while allocating memory");
 852
 853         /*
 854          * Extended attribute inodes have a lookup hash that needs to be
 855          * recalculated with the new csum_seed. Other inodes referencing xattr
 856          * inodes need this value to be up to date. That's why we do two passes:
 857          *
 858          * pass 1: update xattr inodes to update their lookup hash as well as
 859          *         other checksums.
 860          *
 861          * pass 2: go over other inodes to update their checksums.
 862          */
 863         if (ext2fs_has_feature_ea_inode(fs->super))
 864                 pass = 1;
 865         else
 866                 pass = 2;
 867         for (;pass <= 2; pass++) {
 868                 retval = ext2fs_open_inode_scan(fs, 0, &scan);
 869                 if (retval)
 870                         fatal_err(retval, "while opening inode scan");
 871
 872                 do {
 873                         retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 874                                                             ctx.inode_size);
 875                         if (retval)
 876                                 fatal_err(retval, "while getting next inode");
 877                         if (!ino)
 878                                 break;
 879
 880                         if (((pass == 1) &&
 881                              (inode->i_flags & EXT4_EA_INODE_FL)) ||
 882                             ((pass == 2) &&
 883                              !(inode->i_flags & EXT4_EA_INODE_FL)))
 884                                 rewrite_one_inode(&ctx, ino, inode);
 885                 } while (ino);
 886
 887                 ext2fs_close_inode_scan(scan);
 888         }
 889
 890         ext2fs_free_mem(&ctx.zero_inode);
 891         ext2fs_free_mem(&ctx.ea_buf);
 892         ext2fs_free_mem(&inode);
 893 }
 894
 895 static void rewrite_metadata_checksums(ext2_filsys fs)
 896 {
 897         errcode_t retval;
 898         dgrp_t i;
 899
 900         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 901         ext2fs_init_csum_seed(fs);
 902         for (i = 0; i < fs->group_desc_count; i++)
 903                 ext2fs_group_desc_csum_set(fs, i);
 904         retval = ext2fs_read_bitmaps(fs);
 905         if (retval)
 906                 fatal_err(retval, "while reading bitmaps");
 907         rewrite_inodes(fs);
 908         ext2fs_mark_ib_dirty(fs);
 909         ext2fs_mark_bb_dirty(fs);
 910         ext2fs_mmp_update2(fs, 1);
 911         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 912         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 913         if (ext2fs_has_feature_metadata_csum(fs->super))
 914                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 915         else
 916                 fs->super->s_checksum_type = 0;
 917         ext2fs_mark_super_dirty(fs);
 918 }
 919
 920 static void enable_uninit_bg(ext2_filsys fs)
 921 {
 922         struct ext2_group_desc *gd;
 923         dgrp_t i;
 924
 925         for (i = 0; i < fs->group_desc_count; i++) {
 926                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 927                 gd->bg_itable_unused = 0;
 928                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 929                 ext2fs_group_desc_csum_set(fs, i);
 930         }
 931         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 932 }
 933
 934 static errcode_t zero_empty_inodes(ext2_filsys fs)
 935 {
 936         int length = EXT2_INODE_SIZE(fs->super);
 937         struct ext2_inode *inode = NULL;
 938         ext2_inode_scan scan;
 939         errcode_t       retval;
 940         ext2_ino_t      ino;
 941
 942         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 943         if (retval)
 944                 goto out;
 945
 946         retval = ext2fs_get_mem(length, &inode);
 947         if (retval)
 948                 goto out;
 949
 950         do {
 951                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 952                 if (retval)
 953                         goto out;
 954                 if (!ino)
 955                         break;
 956                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 957                         memset(inode, 0, length);
 958                         retval = ext2fs_write_inode_full(fs, ino, inode,
 959                                                          length);
 960                         if (retval)
 961                                 goto out;
 962                 }
 963         } while (1);
 964
 965 out:
 966         ext2fs_free_mem(&inode);
 967         ext2fs_close_inode_scan(scan);
 968         return retval;
 969 }
 970
 971 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 972 {
 973         struct ext2_group_desc *gd;
 974         dgrp_t i;
 975         errcode_t retval;
 976         blk64_t b, c, d;
 977
 978         /* Load bitmaps to ensure that the uninit ones get written out */
 979         fs->super->s_feature_ro_compat |= csum_feature_flag;
 980         retval = ext2fs_read_bitmaps(fs);
 981         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 982         if (retval) {
 983                 com_err("disable_uninit_bg", retval,
 984                         "while reading bitmaps");
 985                 request_fsck_afterwards(fs);
 986                 return retval;
 987         }
 988         ext2fs_mark_ib_dirty(fs);
 989         ext2fs_mark_bb_dirty(fs);
 990
 991         /* If we're only turning off uninit_bg, zero the inodes */
 992         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 993                 retval = zero_empty_inodes(fs);
 994                 if (retval) {
 995                         com_err("disable_uninit_bg", retval,
 996                                 "while zeroing unused inodes");
 997                         request_fsck_afterwards(fs);
 998                         return retval;
 999                 }
1000         }
1001
1002         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1003         for (i = 0; i < fs->group_desc_count; i++) {
1004                 b = ext2fs_block_bitmap_loc(fs, i);
1005                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1006                 b = ext2fs_inode_bitmap_loc(fs, i);
1007                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1008
1009                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1010                 if (retval == 0 && b)
1011                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1012                 if (retval == 0 && c)
1013                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1014                 if (retval == 0 && d)
1015                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1016                 if (retval) {
1017                         com_err("disable_uninit_bg", retval,
1018                                 "while initializing block bitmaps");
1019                         request_fsck_afterwards(fs);
1020                 }
1021
1022                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1023                 gd->bg_itable_unused = 0;
1024                 gd->bg_flags = 0;
1025                 ext2fs_group_desc_csum_set(fs, i);
1026         }
1027         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1028         ext2fs_mark_super_dirty(fs);
1029
1030         return 0;
1031 }
1032
1033 static void
1034 try_confirm_csum_seed_support(void)
1035 {
1036         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1037                 fputs(_("WARNING: Could not confirm kernel support for "
1038                         "metadata_csum_seed.\n  This requires Linux >= "
1039                         "v4.4.\n"), stderr);
1040 }
1041
1042 /*
1043  * Update the feature set as provided by the user.
1044  */
1045 static int update_feature_set(ext2_filsys fs, char *features)
1046 {
1047         struct ext2_super_block *sb = fs->super;
1048         __u32           old_features[3];
1049         int             type_err;
1050         unsigned int    mask_err;
1051         errcode_t       err;
1052         enum quota_type qtype;
1053
1054 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1055                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1056 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1057                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1058 #define FEATURE_CHANGED(type, mask) ((mask) & \
1059                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1060
1061         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1062         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1063         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1064
1065         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1066                               ok_features, clear_ok_features,
1067                               &type_err, &mask_err)) {
1068                 if (!mask_err)
1069                         fprintf(stderr,
1070                                 _("Invalid filesystem option set: %s\n"),
1071                                 features);
1072                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1073                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1074                                           "not supported.\n"),
1075                                 e2p_feature2string(type_err &
1076                                                    E2P_FEATURE_TYPE_MASK,
1077                                                    mask_err));
1078                 else
1079                         fprintf(stderr, _("Setting filesystem feature '%s' "
1080                                           "not supported.\n"),
1081                                 e2p_feature2string(type_err, mask_err));
1082                 return 1;
1083         }
1084
1085         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1086                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1087                     !(mount_flags & EXT2_MF_READONLY)) {
1088                         fputs(_("The has_journal feature may only be "
1089                                 "cleared when the filesystem is\n"
1090                                 "unmounted or mounted "
1091                                 "read-only.\n"), stderr);
1092                         return 1;
1093                 }
1094                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1095                     f_flag < 2) {
1096                         fputs(_("The needs_recovery flag is set.  "
1097                                 "Please run e2fsck before clearing\n"
1098                                 "the has_journal flag.\n"), stderr);
1099                         return 1;
1100                 }
1101                 if (sb->s_journal_inum) {
1102                         if (remove_journal_inode(fs))
1103                                 return 1;
1104                 }
1105                 if (sb->s_journal_dev) {
1106                         if (remove_journal_device(fs))
1107                                 return 1;
1108                 }
1109         }
1110
1111         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1112                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1113                 if (ext2fs_has_feature_meta_bg(sb)) {
1114                         fputs(_("Setting filesystem feature 'sparse_super' "
1115                                 "not supported\nfor filesystems with "
1116                                 "the meta_bg feature enabled.\n"),
1117                                 stderr);
1118                         return 1;
1119                 }
1120         }
1121
1122         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1123                 int error;
1124
1125                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1126                     (mount_flags & EXT2_MF_READONLY)) {
1127                         fputs(_("The multiple mount protection feature can't\n"
1128                                 "be set if the filesystem is mounted or\n"
1129                                 "read-only.\n"), stderr);
1130                         return 1;
1131                 }
1132
1133                 error = ext2fs_mmp_init(fs);
1134                 if (error) {
1135                         fputs(_("\nError while enabling multiple mount "
1136                                 "protection feature."), stderr);
1137                         return 1;
1138                 }
1139
1140                 /*
1141                  * We want to update group desc with the new free blocks count
1142                  */
1143                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1144
1145                 printf(_("Multiple mount protection has been enabled "
1146                          "with update interval %ds.\n"),
1147                        sb->s_mmp_update_interval);
1148         }
1149
1150         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1151                 int error;
1152
1153                 if (mount_flags & EXT2_MF_READONLY) {
1154                         fputs(_("The multiple mount protection feature cannot\n"
1155                                 "be disabled if the filesystem is readonly.\n"),
1156                                 stderr);
1157                         return 1;
1158                 }
1159
1160                 error = ext2fs_read_bitmaps(fs);
1161                 if (error) {
1162                         fputs(_("Error while reading bitmaps\n"), stderr);
1163                         return 1;
1164                 }
1165
1166                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1167                 if (error) {
1168                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1169
1170                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1171                                 printf(_("Magic number in MMP block does not "
1172                                          "match. expected: %x, actual: %x\n"),
1173                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1174                         else
1175                                 com_err(program_name, error, "%s",
1176                                         _("while reading MMP block."));
1177                         goto mmp_error;
1178                 }
1179
1180                 /* We need to force out the group descriptors as well */
1181                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1182                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1183 mmp_error:
1184                 sb->s_mmp_block = 0;
1185                 sb->s_mmp_update_interval = 0;
1186         }
1187
1188         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1189                 /*
1190                  * If adding a journal flag, let the create journal
1191                  * code below handle setting the flag and creating the
1192                  * journal.  We supply a default size if necessary.
1193                  */
1194                 if (!journal_size)
1195                         journal_size = -1;
1196                 ext2fs_clear_feature_journal(sb);
1197         }
1198
1199         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1200                 if (!sb->s_def_hash_version)
1201                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1202                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1203                         uuid_generate((unsigned char *) sb->s_hash_seed);
1204         }
1205
1206         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1207                 if (ext2fs_check_desc(fs)) {
1208                         fputs(_("Clearing the flex_bg flag would "
1209                                 "cause the the filesystem to be\n"
1210                                 "inconsistent.\n"), stderr);
1211                         return 1;
1212                 }
1213         }
1214
1215         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1216                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1217                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1218                     !(mount_flags & EXT2_MF_READONLY)) {
1219                         fputs(_("The huge_file feature may only be "
1220                                 "cleared when the filesystem is\n"
1221                                 "unmounted or mounted "
1222                                 "read-only.\n"), stderr);
1223                         return 1;
1224                 }
1225         }
1226
1227         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1228                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1229                 if (check_fsck_needed(fs,
1230                         _("Enabling checksums could take some time.")))
1231                         return 1;
1232                 if (mount_flags & EXT2_MF_MOUNTED) {
1233                         fputs(_("Cannot enable metadata_csum on a mounted "
1234                                 "filesystem!\n"), stderr);
1235                         return 1;
1236                 }
1237                 if (!ext2fs_has_feature_extents(fs->super))
1238                         printf("%s",
1239                                _("Extents are not enabled.  The file extent "
1240                                  "tree can be checksummed, whereas block maps "
1241                                  "cannot.  Not enabling extents reduces the "
1242                                  "coverage of metadata checksumming.  "
1243                                  "Re-run with -O extent to rectify.\n"));
1244                 if (!ext2fs_has_feature_64bit(fs->super))
1245                         printf("%s",
1246                                _("64-bit filesystem support is not enabled.  "
1247                                  "The larger fields afforded by this feature "
1248                                  "enable full-strength checksumming.  "
1249                                  "Run resize2fs -b to rectify.\n"));
1250                 rewrite_checksums = 1;
1251                 /* metadata_csum supersedes uninit_bg */
1252                 ext2fs_clear_feature_gdt_csum(fs->super);
1253
1254                 /* if uninit_bg was previously off, rewrite group desc */
1255                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1256                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1257                         enable_uninit_bg(fs);
1258
1259                 /*
1260                  * Since metadata_csum supersedes uninit_bg, pretend like
1261                  * uninit_bg has been off all along.
1262                  */
1263                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1264                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1265         }
1266
1267         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1268                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1269                 __u32   test_features[3];
1270
1271                 if (check_fsck_needed(fs,
1272                         _("Disabling checksums could take some time.")))
1273                         return 1;
1274                 if (mount_flags & EXT2_MF_MOUNTED) {
1275                         fputs(_("Cannot disable metadata_csum on a mounted "
1276                                 "filesystem!\n"), stderr);
1277                         return 1;
1278                 }
1279                 rewrite_checksums = 1;
1280
1281                 /* Enable uninit_bg unless the user expressly turned it off */
1282                 memcpy(test_features, old_features, sizeof(test_features));
1283                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1284                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1285                 e2p_edit_feature2(features, test_features, ok_features,
1286                                   clear_ok_features, NULL, NULL);
1287                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1288                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1289                         ext2fs_set_feature_gdt_csum(fs->super);
1290
1291                 /*
1292                  * If we're turning off metadata_csum and not turning on
1293                  * uninit_bg, rewrite group desc.
1294                  */
1295                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1296                         err = disable_uninit_bg(fs,
1297                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1298                         if (err)
1299                                 return 1;
1300                 } else
1301                         /*
1302                          * metadata_csum previously provided uninit_bg, so if
1303                          * we're also setting the uninit_bg feature bit,
1304                          * pretend like it was previously enabled.  Checksums
1305                          * will be rewritten with crc16 later.
1306                          */
1307                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1308                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1309                 fs->super->s_checksum_seed = 0;
1310                 ext2fs_clear_feature_csum_seed(fs->super);
1311         }
1312
1313         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1314                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1315                 if (mount_flags & EXT2_MF_MOUNTED) {
1316                         fputs(_("Cannot enable uninit_bg on a mounted "
1317                                 "filesystem!\n"), stderr);
1318                         return 1;
1319                 }
1320
1321                 /* Do not enable uninit_bg when metadata_csum enabled */
1322                 if (ext2fs_has_feature_metadata_csum(fs->super))
1323                         ext2fs_clear_feature_gdt_csum(fs->super);
1324                 else
1325                         enable_uninit_bg(fs);
1326         }
1327
1328         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1329                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1330                 if (mount_flags & EXT2_MF_MOUNTED) {
1331                         fputs(_("Cannot disable uninit_bg on a mounted "
1332                                 "filesystem!\n"), stderr);
1333                         return 1;
1334                 }
1335
1336                 err = disable_uninit_bg(fs,
1337                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1338                 if (err)
1339                         return 1;
1340         }
1341
1342         /*
1343          * We don't actually toggle 64bit; resize2fs does that.  But this
1344          * must come after the metadata_csum feature_on so that it won't
1345          * complain about the lack of 64bit.
1346          */
1347         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1348                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1349                 if (mount_flags & EXT2_MF_MOUNTED) {
1350                         fprintf(stderr, _("Cannot enable 64-bit mode "
1351                                           "while mounted!\n"));
1352                         return 1;
1353                 }
1354                 ext2fs_clear_feature_64bit(sb);
1355                 feature_64bit = 1;
1356         }
1357         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1358                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1359                 if (mount_flags & EXT2_MF_MOUNTED) {
1360                         fprintf(stderr, _("Cannot disable 64-bit mode "
1361                                           "while mounted!\n"));
1362                         return 1;
1363                 }
1364                 ext2fs_set_feature_64bit(sb);
1365                 feature_64bit = -1;
1366         }
1367
1368         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1369                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1370                 /*
1371                  * Set the Q_flag here and handle the quota options in the code
1372                  * below.
1373                  */
1374                 if (!Q_flag) {
1375                         Q_flag = 1;
1376                         /* Enable usr/grp quota by default */
1377                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1378                                 if (qtype != PRJQUOTA)
1379                                         quota_enable[qtype] = QOPT_ENABLE;
1380                                 else
1381                                         quota_enable[qtype] = QOPT_DISABLE;
1382                         }
1383                 }
1384                 ext2fs_clear_feature_quota(sb);
1385         }
1386
1387         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1388                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1389                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1390                         fprintf(stderr, _("Cannot enable project feature; "
1391                                           "inode size too small.\n"));
1392                         return 1;
1393                 }
1394                 Q_flag = 1;
1395                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1396         }
1397
1398         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1399                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1400                 Q_flag = 1;
1401                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1402         }
1403
1404         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1405                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1406                 /*
1407                  * Set the Q_flag here and handle the quota options in the code
1408                  * below.
1409                  */
1410                 if (Q_flag)
1411                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1412                                 "arguments.\n"), stderr);
1413                 Q_flag = 1;
1414                 /* Disable all quota by default */
1415                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1416                         quota_enable[qtype] = QOPT_DISABLE;
1417         }
1418
1419         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1420                 if (ext2fs_has_feature_casefold(sb)) {
1421                         fputs(_("Cannot enable encrypt feature on filesystems "
1422                                 "with the encoding feature enabled.\n"),
1423                               stderr);
1424                         return 1;
1425                 }
1426                 fs->super->s_encrypt_algos[0] =
1427                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1428                 fs->super->s_encrypt_algos[1] =
1429                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1430         }
1431
1432         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1433                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1434                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1435                         fputs(_("Setting feature 'metadata_csum_seed' "
1436                                 "is only supported\non filesystems with "
1437                                 "the metadata_csum feature enabled.\n"),
1438                                 stderr);
1439                         return 1;
1440                 }
1441                 try_confirm_csum_seed_support();
1442                 fs->super->s_checksum_seed = fs->csum_seed;
1443         }
1444
1445         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1446                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1447                 __le32 uuid_seed;
1448
1449                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1450                                         sizeof(fs->super->s_uuid));
1451                 if (fs->super->s_checksum_seed != uuid_seed) {
1452                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1453                                 fputs(_("UUID has changed since enabling "
1454                 "metadata_csum.  Filesystem must be unmounted "
1455                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1456                                       stderr);
1457                                 return 1;
1458                         }
1459                         if (check_fsck_needed(fs, _("Recalculating checksums "
1460                                                      "could take some time.")))
1461                                 return 1;
1462                         rewrite_checksums = 1;
1463                 }
1464         }
1465
1466         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1467             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1468              sb->s_feature_incompat))
1469                 ext2fs_update_dynamic_rev(fs);
1470
1471         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1472                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1473             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1474                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1475             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1476                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1477             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1478                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1479             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1480                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1481                 request_fsck_afterwards(fs);
1482
1483         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1484             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1485             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1486                 ext2fs_mark_super_dirty(fs);
1487
1488         return 0;
1489 }
1490
1491 /*
1492  * Add a journal to the filesystem.
1493  */
1494 static int add_journal(ext2_filsys fs)
1495 {
1496         unsigned long journal_blocks;
1497         errcode_t       retval;
1498         ext2_filsys     jfs;
1499         io_manager      io_ptr;
1500
1501         if (ext2fs_has_feature_journal(fs->super)) {
1502                 fputs(_("The filesystem already has a journal.\n"), stderr);
1503                 goto err;
1504         }
1505         if (journal_device) {
1506                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1507                                         NULL))
1508                         proceed_question(-1);
1509                 check_mount(journal_device, 0, _("journal"));
1510 #ifdef CONFIG_TESTIO_DEBUG
1511                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1512                         io_ptr = test_io_manager;
1513                         test_io_backing_manager = unix_io_manager;
1514                 } else
1515 #endif
1516                         io_ptr = unix_io_manager;
1517                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1518                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1519                                      fs->blocksize, io_ptr, &jfs);
1520                 if (retval) {
1521                         com_err(program_name, retval,
1522                                 _("\n\twhile trying to open journal on %s\n"),
1523                                 journal_device);
1524                         goto err;
1525                 }
1526                 printf(_("Creating journal on device %s: "),
1527                        journal_device);
1528                 fflush(stdout);
1529
1530                 retval = ext2fs_add_journal_device(fs, jfs);
1531                 ext2fs_close_free(&jfs);
1532                 if (retval) {
1533                         com_err(program_name, retval,
1534                                 _("while adding filesystem to journal on %s"),
1535                                 journal_device);
1536                         goto err;
1537                 }
1538                 fputs(_("done\n"), stdout);
1539         } else if (journal_size) {
1540                 fputs(_("Creating journal inode: "), stdout);
1541                 fflush(stdout);
1542                 journal_blocks = figure_journal_size(journal_size, fs);
1543
1544                 if (journal_location_string)
1545                         journal_location =
1546                                 parse_num_blocks2(journal_location_string,
1547                                                   fs->super->s_log_block_size);
1548                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1549                                                    journal_location,
1550                                                    journal_flags);
1551                 if (retval) {
1552                         fprintf(stderr, "\n");
1553                         com_err(program_name, retval, "%s",
1554                                 _("\n\twhile trying to create journal file"));
1555                         return retval;
1556                 } else
1557                         fputs(_("done\n"), stdout);
1558                 /*
1559                  * If the filesystem wasn't mounted, we need to force
1560                  * the block group descriptors out.
1561                  */
1562                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1563                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1564         }
1565         print_check_message(fs->super->s_max_mnt_count,
1566                             fs->super->s_checkinterval);
1567         return 0;
1568
1569 err:
1570         free(journal_device);
1571         return 1;
1572 }
1573
1574 static int handle_quota_options(ext2_filsys fs)
1575 {
1576         errcode_t retval;
1577         quota_ctx_t qctx;
1578         ext2_ino_t qf_ino;
1579         enum quota_type qtype;
1580         unsigned int qtype_bits = 0;
1581         int need_dirty = 0;
1582
1583         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1584                 if (quota_enable[qtype] != 0)
1585                         break;
1586         if (qtype == MAXQUOTAS)
1587                 /* Nothing to do. */
1588                 return 0;
1589
1590         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1591             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1592                 fprintf(stderr, _("Cannot enable project quota; "
1593                                   "inode size too small.\n"));
1594                 return 1;
1595         }
1596
1597         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1598                 if (quota_enable[qtype] == QOPT_ENABLE)
1599                         qtype_bits |= 1 << qtype;
1600         }
1601
1602         retval = quota_init_context(&qctx, fs, qtype_bits);
1603         if (retval) {
1604                 com_err(program_name, retval,
1605                         _("while initializing quota context in support library"));
1606                 return 1;
1607         }
1608
1609         if (qtype_bits)
1610                 quota_compute_usage(qctx);
1611
1612         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1613                 if (quota_enable[qtype] == QOPT_ENABLE &&
1614                     *quota_sb_inump(fs->super, qtype) == 0) {
1615                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1616                                 retval = quota_update_limits(qctx, qf_ino,
1617                                                              qtype);
1618                                 if (retval) {
1619                                         com_err(program_name, retval,
1620                                                 _("while updating quota limits (%d)"),
1621                                                 qtype);
1622                                         return 1;
1623                                 }
1624                         }
1625                         retval = quota_write_inode(qctx, 1 << qtype);
1626                         if (retval) {
1627                                 com_err(program_name, retval,
1628                                         _("while writing quota file (%d)"),
1629                                         qtype);
1630                                 return 1;
1631                         }
1632                         /* Enable Quota feature if one of quota enabled */
1633                         if (!ext2fs_has_feature_quota(fs->super)) {
1634                                 ext2fs_set_feature_quota(fs->super);
1635                                 need_dirty = 1;
1636                         }
1637                         if (qtype == PRJQUOTA &&
1638                             !ext2fs_has_feature_project(fs->super)) {
1639                                 ext2fs_set_feature_project(fs->super);
1640                                 need_dirty = 1;
1641                         }
1642                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1643                         retval = quota_remove_inode(fs, qtype);
1644                         if (retval) {
1645                                 com_err(program_name, retval,
1646                                         _("while removing quota file (%d)"),
1647                                         qtype);
1648                                 return 1;
1649                         }
1650                         if (qtype == PRJQUOTA) {
1651                                 ext2fs_clear_feature_project(fs->super);
1652                                 need_dirty = 1;
1653                         }
1654                 }
1655         }
1656
1657         quota_release_context(&qctx);
1658         /* Clear Quota feature if all quota types disabled. */
1659         if (!qtype_bits) {
1660                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1661                         if (*quota_sb_inump(fs->super, qtype))
1662                                 break;
1663                 if (qtype == MAXQUOTAS) {
1664                         ext2fs_clear_feature_quota(fs->super);
1665                         need_dirty = 1;
1666                 }
1667
1668         }
1669         if (need_dirty)
1670                 ext2fs_mark_super_dirty(fs);
1671         return 0;
1672 }
1673
1674 static int option_handle_function(char *token)
1675 {
1676         if (strncmp(token, "usr", 3) == 0) {
1677                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1678         } else if (strncmp(token, "^usr", 4) == 0) {
1679                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1680         } else if (strncmp(token, "grp", 3) == 0) {
1681                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1682         } else if (strncmp(token, "^grp", 4) == 0) {
1683                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1684         } else if (strncmp(token, "prj", 3) == 0) {
1685                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1686         } else if (strncmp(token, "^prj", 4) == 0) {
1687                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1688         } else {
1689                 fputs(_("\nBad quota options specified.\n\n"
1690                         "Following valid quota options are available "
1691                         "(pass by separating with comma):\n"
1692                         "\t[^]usr[quota]\n"
1693                         "\t[^]grp[quota]\n"
1694                         "\t[^]prj[quota]\n"
1695                         "\n\n"), stderr);
1696                 return 1;
1697         }
1698         return 0;
1699 }
1700
1701 static void parse_e2label_options(int argc, char ** argv)
1702 {
1703         if ((argc < 2) || (argc > 3)) {
1704                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1705                 exit(1);
1706         }
1707         io_options = strchr(argv[1], '?');
1708         if (io_options)
1709                 *io_options++ = 0;
1710         device_name = blkid_get_devname(NULL, argv[1], NULL);
1711         if (!device_name) {
1712                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1713                         argv[1]);
1714                 exit(1);
1715         }
1716         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1717         if (argc == 3) {
1718                 open_flag |= EXT2_FLAG_RW;
1719                 L_flag = 1;
1720                 new_label = argv[2];
1721         } else
1722                 print_label++;
1723 }
1724
1725 static time_t parse_time(char *str)
1726 {
1727         struct  tm      ts;
1728
1729         if (strcmp(str, "now") == 0) {
1730                 return (time(0));
1731         }
1732         memset(&ts, 0, sizeof(ts));
1733 #ifdef HAVE_STRPTIME
1734         strptime(str, "%Y%m%d%H%M%S", &ts);
1735 #else
1736         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1737                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1738         ts.tm_year -= 1900;
1739         ts.tm_mon -= 1;
1740         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1741             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1742             ts.tm_min > 59 || ts.tm_sec > 61)
1743                 ts.tm_mday = 0;
1744 #endif
1745         if (ts.tm_mday == 0) {
1746                 com_err(program_name, 0,
1747                         _("Couldn't parse date/time specifier: %s"),
1748                         str);
1749                 usage();
1750         }
1751         ts.tm_isdst = -1;
1752         return (mktime(&ts));
1753 }
1754
1755 static void parse_tune2fs_options(int argc, char **argv)
1756 {
1757         int c;
1758         char *tmp;
1759         struct group *gr;
1760         struct passwd *pw;
1761         int ret;
1762         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1763
1764         open_flag = 0;
1765         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1766         while ((c = getopt(argc, argv, optstring)) != EOF)
1767                 switch (c) {
1768                 case 'c':
1769                         max_mount_count = strtol(optarg, &tmp, 0);
1770                         if (*tmp || max_mount_count > 16000) {
1771                                 com_err(program_name, 0,
1772                                         _("bad mounts count - %s"),
1773                                         optarg);
1774                                 usage();
1775                         }
1776                         if (max_mount_count == 0)
1777                                 max_mount_count = -1;
1778                         c_flag = 1;
1779                         open_flag = EXT2_FLAG_RW;
1780                         break;
1781                 case 'C':
1782                         mount_count = strtoul(optarg, &tmp, 0);
1783                         if (*tmp || mount_count > 16000) {
1784                                 com_err(program_name, 0,
1785                                         _("bad mounts count - %s"),
1786                                         optarg);
1787                                 usage();
1788                         }
1789                         C_flag = 1;
1790                         open_flag = EXT2_FLAG_RW;
1791                         break;
1792                 case 'e':
1793                         if (strcmp(optarg, "continue") == 0)
1794                                 errors = EXT2_ERRORS_CONTINUE;
1795                         else if (strcmp(optarg, "remount-ro") == 0)
1796                                 errors = EXT2_ERRORS_RO;
1797                         else if (strcmp(optarg, "panic") == 0)
1798                                 errors = EXT2_ERRORS_PANIC;
1799                         else {
1800                                 com_err(program_name, 0,
1801                                         _("bad error behavior - %s"),
1802                                         optarg);
1803                                 usage();
1804                         }
1805                         e_flag = 1;
1806                         open_flag = EXT2_FLAG_RW;
1807                         break;
1808                 case 'E':
1809                         extended_cmd = optarg;
1810                         open_flag |= EXT2_FLAG_RW;
1811                         break;
1812                 case 'f': /* Force */
1813                         f_flag++;
1814                         break;
1815                 case 'g':
1816                         resgid = strtoul(optarg, &tmp, 0);
1817                         if (*tmp) {
1818                                 gr = getgrnam(optarg);
1819                                 if (gr == NULL)
1820                                         tmp = optarg;
1821                                 else {
1822                                         resgid = gr->gr_gid;
1823                                         *tmp = 0;
1824                                 }
1825                         }
1826                         if (*tmp) {
1827                                 com_err(program_name, 0,
1828                                         _("bad gid/group name - %s"),
1829                                         optarg);
1830                                 usage();
1831                         }
1832                         g_flag = 1;
1833                         open_flag = EXT2_FLAG_RW;
1834                         break;
1835                 case 'i':
1836                         interval = strtoul(optarg, &tmp, 0);
1837                         switch (*tmp) {
1838                         case 's':
1839                                 tmp++;
1840                                 break;
1841                         case '\0':
1842                         case 'd':
1843                         case 'D': /* days */
1844                                 interval *= 86400;
1845                                 if (*tmp != '\0')
1846                                         tmp++;
1847                                 break;
1848                         case 'm':
1849                         case 'M': /* months! */
1850                                 interval *= 86400 * 30;
1851                                 tmp++;
1852                                 break;
1853                         case 'w':
1854                         case 'W': /* weeks */
1855                                 interval *= 86400 * 7;
1856                                 tmp++;
1857                                 break;
1858                         }
1859                         if (*tmp) {
1860                                 com_err(program_name, 0,
1861                                         _("bad interval - %s"), optarg);
1862                                 usage();
1863                         }
1864                         i_flag = 1;
1865                         open_flag = EXT2_FLAG_RW;
1866                         break;
1867                 case 'j':
1868                         if (!journal_size)
1869                                 journal_size = -1;
1870                         open_flag = EXT2_FLAG_RW;
1871                         break;
1872                 case 'J':
1873                         parse_journal_opts(optarg);
1874                         open_flag = EXT2_FLAG_RW;
1875                         break;
1876                 case 'l':
1877                         l_flag = 1;
1878                         break;
1879                 case 'L':
1880                         new_label = optarg;
1881                         L_flag = 1;
1882                         open_flag |= EXT2_FLAG_RW |
1883                                 EXT2_FLAG_JOURNAL_DEV_OK;
1884                         break;
1885                 case 'm':
1886                         reserved_ratio = strtod(optarg, &tmp);
1887                         if (*tmp || reserved_ratio > 50 ||
1888                             reserved_ratio < 0) {
1889                                 com_err(program_name, 0,
1890                                         _("bad reserved block ratio - %s"),
1891                                         optarg);
1892                                 usage();
1893                         }
1894                         m_flag = 1;
1895                         open_flag = EXT2_FLAG_RW;
1896                         break;
1897                 case 'M':
1898                         new_last_mounted = optarg;
1899                         M_flag = 1;
1900                         open_flag = EXT2_FLAG_RW;
1901                         break;
1902                 case 'o':
1903                         if (mntopts_cmd) {
1904                                 com_err(program_name, 0, "%s",
1905                                         _("-o may only be specified once"));
1906                                 usage();
1907                         }
1908                         mntopts_cmd = optarg;
1909                         open_flag = EXT2_FLAG_RW;
1910                         break;
1911                 case 'O':
1912                         if (features_cmd) {
1913                                 com_err(program_name, 0, "%s",
1914                                         _("-O may only be specified once"));
1915                                 usage();
1916                         }
1917                         features_cmd = optarg;
1918                         open_flag = EXT2_FLAG_RW;
1919                         break;
1920                 case 'Q':
1921                         Q_flag = 1;
1922                         ret = parse_quota_opts(optarg, option_handle_function);
1923                         if (ret)
1924                                 exit(1);
1925                         open_flag = EXT2_FLAG_RW;
1926                         break;
1927                 case 'r':
1928                         reserved_blocks = strtoul(optarg, &tmp, 0);
1929                         if (*tmp) {
1930                                 com_err(program_name, 0,
1931                                         _("bad reserved blocks count - %s"),
1932                                         optarg);
1933                                 usage();
1934                         }
1935                         r_flag = 1;
1936                         open_flag = EXT2_FLAG_RW;
1937                         break;
1938                 case 's': /* Deprecated */
1939                         s_flag = atoi(optarg);
1940                         open_flag = EXT2_FLAG_RW;
1941                         break;
1942                 case 'T':
1943                         T_flag = 1;
1944                         last_check_time = parse_time(optarg);
1945                         open_flag = EXT2_FLAG_RW;
1946                         break;
1947                 case 'u':
1948                                 resuid = strtoul(optarg, &tmp, 0);
1949                                 if (*tmp) {
1950                                         pw = getpwnam(optarg);
1951                                         if (pw == NULL)
1952                                                 tmp = optarg;
1953                                         else {
1954                                                 resuid = pw->pw_uid;
1955                                                 *tmp = 0;
1956                                         }
1957                                 }
1958                                 if (*tmp) {
1959                                         com_err(program_name, 0,
1960                                                 _("bad uid/user name - %s"),
1961                                                 optarg);
1962                                         usage();
1963                                 }
1964                                 u_flag = 1;
1965                                 open_flag = EXT2_FLAG_RW;
1966                                 break;
1967                 case 'U':
1968                         new_UUID = optarg;
1969                         U_flag = 1;
1970                         open_flag = EXT2_FLAG_RW |
1971                                 EXT2_FLAG_JOURNAL_DEV_OK;
1972                         break;
1973                 case 'I':
1974                         new_inode_size = strtoul(optarg, &tmp, 0);
1975                         if (*tmp) {
1976                                 com_err(program_name, 0,
1977                                         _("bad inode size - %s"),
1978                                         optarg);
1979                                 usage();
1980                         }
1981                         if (!((new_inode_size &
1982                                (new_inode_size - 1)) == 0)) {
1983                                 com_err(program_name, 0,
1984                                         _("Inode size must be a "
1985                                           "power of two- %s"),
1986                                         optarg);
1987                                 usage();
1988                         }
1989                         open_flag = EXT2_FLAG_RW;
1990                         I_flag = 1;
1991                         break;
1992                 case 'z':
1993                         undo_file = optarg;
1994                         break;
1995                 default:
1996                         usage();
1997                 }
1998         if (optind < argc - 1 || optind == argc)
1999                 usage();
2000         if (!open_flag && !l_flag)
2001                 usage();
2002         io_options = strchr(argv[optind], '?');
2003         if (io_options)
2004                 *io_options++ = 0;
2005         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2006         if (!device_name) {
2007                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2008                         argv[optind]);
2009                 exit(1);
2010         }
2011 }
2012
2013 #ifdef CONFIG_BUILD_FINDFS
2014 void do_findfs(int argc, char **argv)
2015 {
2016         char    *dev;
2017
2018         if ((argc != 2) ||
2019             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2020                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2021                 exit(2);
2022         }
2023         dev = blkid_get_devname(NULL, argv[1], NULL);
2024         if (!dev) {
2025                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2026                         argv[1]);
2027                 exit(1);
2028         }
2029         puts(dev);
2030         exit(0);
2031 }
2032 #endif
2033
2034 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2035 {
2036         char    *buf, *token, *next, *p, *arg;
2037         int     len, hash_alg;
2038         int     r_usage = 0;
2039
2040         len = strlen(opts);
2041         buf = malloc(len+1);
2042         if (!buf) {
2043                 fprintf(stderr, "%s",
2044                         _("Couldn't allocate memory to parse options!\n"));
2045                 return 1;
2046         }
2047         strcpy(buf, opts);
2048         for (token = buf; token && *token; token = next) {
2049                 p = strchr(token, ',');
2050                 next = 0;
2051                 if (p) {
2052                         *p = 0;
2053                         next = p+1;
2054                 }
2055                 arg = strchr(token, '=');
2056                 if (arg) {
2057                         *arg = 0;
2058                         arg++;
2059                 }
2060                 if (strcmp(token, "clear-mmp") == 0 ||
2061                     strcmp(token, "clear_mmp") == 0) {
2062                         clear_mmp = 1;
2063                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2064                         unsigned long intv;
2065                         if (!arg) {
2066                                 r_usage++;
2067                                 continue;
2068                         }
2069                         intv = strtoul(arg, &p, 0);
2070                         if (*p) {
2071                                 fprintf(stderr,
2072                                         _("Invalid mmp_update_interval: %s\n"),
2073                                         arg);
2074                                 r_usage++;
2075                                 continue;
2076                         }
2077                         if (intv == 0) {
2078                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2079                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2080                                 fprintf(stderr,
2081                                         _("mmp_update_interval too big: %lu\n"),
2082                                         intv);
2083                                 r_usage++;
2084                                 continue;
2085                         }
2086                         printf(P_("Setting multiple mount protection update "
2087                                   "interval to %lu second\n",
2088                                   "Setting multiple mount protection update "
2089                                   "interval to %lu seconds\n", intv),
2090                                intv);
2091                         fs->super->s_mmp_update_interval = intv;
2092                         ext2fs_mark_super_dirty(fs);
2093                 } else if (!strcmp(token, "force_fsck")) {
2094                         fs->super->s_state |= EXT2_ERROR_FS;
2095                         printf(_("Setting filesystem error flag to force fsck.\n"));
2096                         ext2fs_mark_super_dirty(fs);
2097                 } else if (!strcmp(token, "test_fs")) {
2098                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2099                         printf("Setting test filesystem flag\n");
2100                         ext2fs_mark_super_dirty(fs);
2101                 } else if (!strcmp(token, "^test_fs")) {
2102                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2103                         printf("Clearing test filesystem flag\n");
2104                         ext2fs_mark_super_dirty(fs);
2105                 } else if (strcmp(token, "stride") == 0) {
2106                         if (!arg) {
2107                                 r_usage++;
2108                                 continue;
2109                         }
2110                         stride = strtoul(arg, &p, 0);
2111                         if (*p) {
2112                                 fprintf(stderr,
2113                                         _("Invalid RAID stride: %s\n"),
2114                                         arg);
2115                                 r_usage++;
2116                                 continue;
2117                         }
2118                         stride_set = 1;
2119                 } else if (strcmp(token, "stripe-width") == 0 ||
2120                            strcmp(token, "stripe_width") == 0) {
2121                         if (!arg) {
2122                                 r_usage++;
2123                                 continue;
2124                         }
2125                         stripe_width = strtoul(arg, &p, 0);
2126                         if (*p) {
2127                                 fprintf(stderr,
2128                                         _("Invalid RAID stripe-width: %s\n"),
2129                                         arg);
2130                                 r_usage++;
2131                                 continue;
2132                         }
2133                         stripe_width_set = 1;
2134                 } else if (strcmp(token, "hash_alg") == 0 ||
2135                            strcmp(token, "hash-alg") == 0) {
2136                         if (!arg) {
2137                                 r_usage++;
2138                                 continue;
2139                         }
2140                         hash_alg = e2p_string2hash(arg);
2141                         if (hash_alg < 0) {
2142                                 fprintf(stderr,
2143                                         _("Invalid hash algorithm: %s\n"),
2144                                         arg);
2145                                 r_usage++;
2146                                 continue;
2147                         }
2148                         fs->super->s_def_hash_version = hash_alg;
2149                         printf(_("Setting default hash algorithm "
2150                                  "to %s (%d)\n"),
2151                                arg, hash_alg);
2152                         ext2fs_mark_super_dirty(fs);
2153                 } else if (!strcmp(token, "mount_opts")) {
2154                         if (!arg) {
2155                                 r_usage++;
2156                                 continue;
2157                         }
2158                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2159                                 fprintf(stderr,
2160                                         "Extended mount options too long\n");
2161                                 continue;
2162                         }
2163                         ext_mount_opts = strdup(arg);
2164                 } else
2165                         r_usage++;
2166         }
2167         if (r_usage) {
2168                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2169                         "Extended options are separated by commas, "
2170                         "and may take an argument which\n"
2171                         "\tis set off by an equals ('=') sign.\n\n"
2172                         "Valid extended options are:\n"
2173                         "\tclear_mmp\n"
2174                         "\thash_alg=<hash algorithm>\n"
2175                         "\tmount_opts=<extended default mount options>\n"
2176                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2177                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2178                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2179                         "\tforce_fsck\n"
2180                         "\ttest_fs\n"
2181                         "\t^test_fs\n"));
2182                 free(buf);
2183                 return 1;
2184         }
2185         free(buf);
2186
2187         return 0;
2188 }
2189
2190 /*
2191  * Fill in the block bitmap bmap with the information regarding the
2192  * blocks to be moved
2193  */
2194 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2195                             ext2fs_block_bitmap bmap)
2196 {
2197         dgrp_t i;
2198         int retval;
2199         ext2_badblocks_list bb_list = 0;
2200         blk64_t j, needed_blocks = 0;
2201         blk64_t start_blk, end_blk;
2202
2203         retval = ext2fs_read_bb_inode(fs, &bb_list);
2204         if (retval)
2205                 return retval;
2206
2207         for (i = 0; i < fs->group_desc_count; i++) {
2208                 start_blk = ext2fs_inode_table_loc(fs, i) +
2209                                         fs->inode_blocks_per_group;
2210
2211                 end_blk = ext2fs_inode_table_loc(fs, i) +
2212                                         new_ino_blks_per_grp;
2213
2214                 for (j = start_blk; j < end_blk; j++) {
2215                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2216                                 /*
2217                                  * IF the block is a bad block we fail
2218                                  */
2219                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2220                                         ext2fs_badblocks_list_free(bb_list);
2221                                         return ENOSPC;
2222                                 }
2223
2224                                 ext2fs_mark_block_bitmap2(bmap, j);
2225                         } else {
2226                                 /*
2227                                  * We are going to use this block for
2228                                  * inode table. So mark them used.
2229                                  */
2230                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2231                         }
2232                 }
2233                 needed_blocks += end_blk - start_blk;
2234         }
2235
2236         ext2fs_badblocks_list_free(bb_list);
2237         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2238                 return ENOSPC;
2239
2240         return 0;
2241 }
2242
2243 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2244 {
2245         dgrp_t group;
2246         group = ext2fs_group_of_blk2(fs, blk);
2247         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2248                 return 1;
2249         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2250                 return 1;
2251         return 0;
2252 }
2253
2254 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2255 {
2256         blk64_t start_blk, end_blk;
2257         start_blk = fs->super->s_first_data_block +
2258                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2259         /*
2260          * We cannot get new block beyond end_blk for for the last block group
2261          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2262          */
2263         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2264         if (blk >= start_blk && blk <= end_blk)
2265                 return 1;
2266         return 0;
2267 }
2268
2269 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2270 {
2271
2272         char *buf;
2273         dgrp_t group = 0;
2274         errcode_t retval;
2275         int meta_data = 0;
2276         blk64_t blk, new_blk, goal;
2277         struct blk_move *bmv;
2278
2279         retval = ext2fs_get_mem(fs->blocksize, &buf);
2280         if (retval)
2281                 return retval;
2282
2283         for (new_blk = blk = fs->super->s_first_data_block;
2284              blk < ext2fs_blocks_count(fs->super); blk++) {
2285                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2286                         continue;
2287
2288                 if (ext2fs_is_meta_block(fs, blk)) {
2289                         /*
2290                          * If the block is mapping a fs meta data block
2291                          * like group desc/block bitmap/inode bitmap. We
2292                          * should find a block in the same group and fix
2293                          * the respective fs metadata pointers. Otherwise
2294                          * fail
2295                          */
2296                         group = ext2fs_group_of_blk2(fs, blk);
2297                         goal = ext2fs_group_first_block2(fs, group);
2298                         meta_data = 1;
2299
2300                 } else {
2301                         goal = new_blk;
2302                 }
2303                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2304                 if (retval)
2305                         goto err_out;
2306
2307                 /* new fs meta data block should be in the same group */
2308                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2309                         retval = ENOSPC;
2310                         goto err_out;
2311                 }
2312
2313                 /* Mark this block as allocated */
2314                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2315
2316                 /* Add it to block move list */
2317                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2318                 if (retval)
2319                         goto err_out;
2320
2321                 bmv->old_loc = blk;
2322                 bmv->new_loc = new_blk;
2323
2324                 list_add(&(bmv->list), &blk_move_list);
2325
2326                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2327                 if (retval)
2328                         goto err_out;
2329
2330                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2331                 if (retval)
2332                         goto err_out;
2333         }
2334
2335 err_out:
2336         ext2fs_free_mem(&buf);
2337         return retval;
2338 }
2339
2340 static blk64_t translate_block(blk64_t blk)
2341 {
2342         struct list_head *entry;
2343         struct blk_move *bmv;
2344
2345         list_for_each(entry, &blk_move_list) {
2346                 bmv = list_entry(entry, struct blk_move, list);
2347                 if (bmv->old_loc == blk)
2348                         return bmv->new_loc;
2349         }
2350
2351         return 0;
2352 }
2353
2354 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2355                          blk64_t *block_nr,
2356                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2357                          blk64_t ref_block EXT2FS_ATTR((unused)),
2358                          int ref_offset EXT2FS_ATTR((unused)),
2359                          void *priv_data)
2360 {
2361         int ret = 0;
2362         blk64_t new_blk;
2363         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2364
2365         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2366                 return 0;
2367         new_blk = translate_block(*block_nr);
2368         if (new_blk) {
2369                 *block_nr = new_blk;
2370                 /*
2371                  * This will force the ext2fs_write_inode in the iterator
2372                  */
2373                 ret |= BLOCK_CHANGED;
2374         }
2375
2376         return ret;
2377 }
2378
2379 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2380 {
2381         errcode_t retval = 0;
2382         ext2_ino_t ino;
2383         blk64_t blk;
2384         char *block_buf = 0;
2385         struct ext2_inode inode;
2386         ext2_inode_scan scan = NULL;
2387
2388         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2389         if (retval)
2390                 return retval;
2391
2392         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2393         if (retval)
2394                 goto err_out;
2395
2396         while (1) {
2397                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2398                 if (retval)
2399                         goto err_out;
2400
2401                 if (!ino)
2402                         break;
2403
2404                 if (inode.i_links_count == 0)
2405                         continue; /* inode not in use */
2406
2407                 /* FIXME!!
2408                  * If we end up modifying the journal inode
2409                  * the sb->s_jnl_blocks will differ. But a
2410                  * subsequent e2fsck fixes that.
2411                  * Do we need to fix this ??
2412                  */
2413
2414                 if (ext2fs_file_acl_block(fs, &inode) &&
2415                     ext2fs_test_block_bitmap2(bmap,
2416                                         ext2fs_file_acl_block(fs, &inode))) {
2417                         blk = translate_block(ext2fs_file_acl_block(fs,
2418                                                                     &inode));
2419                         if (!blk)
2420                                 continue;
2421
2422                         ext2fs_file_acl_block_set(fs, &inode, blk);
2423
2424                         /*
2425                          * Write the inode to disk so that inode table
2426                          * resizing can work
2427                          */
2428                         retval = ext2fs_write_inode(fs, ino, &inode);
2429                         if (retval)
2430                                 goto err_out;
2431                 }
2432
2433                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2434                         continue;
2435
2436                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2437                                                process_block, bmap);
2438                 if (retval)
2439                         goto err_out;
2440
2441         }
2442
2443 err_out:
2444         ext2fs_free_mem(&block_buf);
2445         ext2fs_close_inode_scan(scan);
2446
2447         return retval;
2448 }
2449
2450 /*
2451  * We need to scan for inode and block bitmaps that may need to be
2452  * moved.  This can take place if the filesystem was formatted for
2453  * RAID arrays using the mke2fs's extended option "stride".
2454  */
2455 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2456 {
2457         dgrp_t i;
2458         blk64_t blk, new_blk;
2459
2460         for (i = 0; i < fs->group_desc_count; i++) {
2461                 blk = ext2fs_block_bitmap_loc(fs, i);
2462                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2463                         new_blk = translate_block(blk);
2464                         if (!new_blk)
2465                                 continue;
2466                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2467                 }
2468
2469                 blk = ext2fs_inode_bitmap_loc(fs, i);
2470                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2471                         new_blk = translate_block(blk);
2472                         if (!new_blk)
2473                                 continue;
2474                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2475                 }
2476         }
2477         return 0;
2478 }
2479
2480 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2481 {
2482         dgrp_t i;
2483         blk64_t blk;
2484         errcode_t retval;
2485         int new_ino_blks_per_grp;
2486         unsigned int j;
2487         char *old_itable = NULL, *new_itable = NULL;
2488         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2489         unsigned long old_ino_size;
2490         int old_itable_size, new_itable_size;
2491
2492         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2493         old_ino_size = EXT2_INODE_SIZE(fs->super);
2494
2495         new_ino_blks_per_grp = ext2fs_div_ceil(
2496                                         EXT2_INODES_PER_GROUP(fs->super) *
2497                                         new_ino_size,
2498                                         fs->blocksize);
2499
2500         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2501
2502         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2503         if (retval)
2504                 return retval;
2505
2506         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2507         if (retval)
2508                 goto err_out;
2509
2510         tmp_old_itable = old_itable;
2511         tmp_new_itable = new_itable;
2512
2513         for (i = 0; i < fs->group_desc_count; i++) {
2514                 blk = ext2fs_inode_table_loc(fs, i);
2515                 retval = io_channel_read_blk64(fs->io, blk,
2516                                 fs->inode_blocks_per_group, old_itable);
2517                 if (retval)
2518                         goto err_out;
2519
2520                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2521                         memcpy(new_itable, old_itable, old_ino_size);
2522
2523                         memset(new_itable+old_ino_size, 0,
2524                                         new_ino_size - old_ino_size);
2525
2526                         new_itable += new_ino_size;
2527                         old_itable += old_ino_size;
2528                 }
2529
2530                 /* reset the pointer */
2531                 old_itable = tmp_old_itable;
2532                 new_itable = tmp_new_itable;
2533
2534                 retval = io_channel_write_blk64(fs->io, blk,
2535                                         new_ino_blks_per_grp, new_itable);
2536                 if (retval)
2537                         goto err_out;
2538         }
2539
2540         /* Update the meta data */
2541         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2542         ext2fs_free_inode_cache(fs->icache);
2543         fs->icache = 0;
2544         fs->super->s_inode_size = new_ino_size;
2545
2546 err_out:
2547         if (old_itable)
2548                 ext2fs_free_mem(&old_itable);
2549
2550         if (new_itable)
2551                 ext2fs_free_mem(&new_itable);
2552
2553         return retval;
2554 }
2555
2556 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2557 {
2558         blk64_t         blk;
2559         ext2_ino_t      ino;
2560         unsigned int    group = 0;
2561         unsigned int    count = 0;
2562         int             total_free = 0;
2563         int             group_free = 0;
2564
2565         /*
2566          * First calculate the block statistics
2567          */
2568         for (blk = fs->super->s_first_data_block;
2569              blk < ext2fs_blocks_count(fs->super); blk++) {
2570                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2571                         group_free++;
2572                         total_free++;
2573                 }
2574                 count++;
2575                 if ((count == fs->super->s_blocks_per_group) ||
2576                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2577                         ext2fs_bg_free_blocks_count_set(fs, group++,
2578                                                         group_free);
2579                         count = 0;
2580                         group_free = 0;
2581                 }
2582         }
2583         total_free = EXT2FS_C2B(fs, total_free);
2584         ext2fs_free_blocks_count_set(fs->super, total_free);
2585
2586         /*
2587          * Next, calculate the inode statistics
2588          */
2589         group_free = 0;
2590         total_free = 0;
2591         count = 0;
2592         group = 0;
2593
2594         /* Protect loop from wrap-around if s_inodes_count maxed */
2595         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2596                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2597                         group_free++;
2598                         total_free++;
2599                 }
2600                 count++;
2601                 if ((count == fs->super->s_inodes_per_group) ||
2602                     (ino == fs->super->s_inodes_count)) {
2603                         ext2fs_bg_free_inodes_count_set(fs, group++,
2604                                                         group_free);
2605                         count = 0;
2606                         group_free = 0;
2607                 }
2608         }
2609         fs->super->s_free_inodes_count = total_free;
2610         ext2fs_mark_super_dirty(fs);
2611         return 0;
2612 }
2613
2614 #define list_for_each_safe(pos, pnext, head) \
2615         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2616              pos = pnext, pnext = pos->next)
2617
2618 static void free_blk_move_list(void)
2619 {
2620         struct list_head *entry, *tmp;
2621         struct blk_move *bmv;
2622
2623         list_for_each_safe(entry, tmp, &blk_move_list) {
2624                 bmv = list_entry(entry, struct blk_move, list);
2625                 list_del(entry);
2626                 ext2fs_free_mem(&bmv);
2627         }
2628         return;
2629 }
2630
2631 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2632 {
2633         errcode_t retval;
2634         int new_ino_blks_per_grp;
2635         ext2fs_block_bitmap bmap;
2636
2637         retval = ext2fs_read_inode_bitmap(fs);
2638         if (retval) {
2639                 fputs(_("Failed to read inode bitmap\n"), stderr);
2640                 return retval;
2641         }
2642         retval = ext2fs_read_block_bitmap(fs);
2643         if (retval) {
2644                 fputs(_("Failed to read block bitmap\n"), stderr);
2645                 return retval;
2646         }
2647         INIT_LIST_HEAD(&blk_move_list);
2648
2649
2650         new_ino_blks_per_grp = ext2fs_div_ceil(
2651                                         EXT2_INODES_PER_GROUP(fs->super)*
2652                                         new_size,
2653                                         fs->blocksize);
2654
2655         /* We may change the file system.
2656          * Mark the file system as invalid so that
2657          * the user is prompted to run fsck.
2658          */
2659         fs->super->s_state &= ~EXT2_VALID_FS;
2660
2661         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2662                                                 &bmap);
2663         if (retval) {
2664                 fputs(_("Failed to allocate block bitmap when "
2665                                 "increasing inode size\n"), stderr);
2666                 return retval;
2667         }
2668         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2669         if (retval) {
2670                 fputs(_("Not enough space to increase inode size \n"), stderr);
2671                 goto err_out;
2672         }
2673         retval = move_block(fs, bmap);
2674         if (retval) {
2675                 fputs(_("Failed to relocate blocks during inode resize \n"),
2676                       stderr);
2677                 goto err_out;
2678         }
2679         retval = inode_scan_and_fix(fs, bmap);
2680         if (retval)
2681                 goto err_out_undo;
2682
2683         retval = group_desc_scan_and_fix(fs, bmap);
2684         if (retval)
2685                 goto err_out_undo;
2686
2687         retval = expand_inode_table(fs, new_size);
2688         if (retval)
2689                 goto err_out_undo;
2690
2691         ext2fs_calculate_summary_stats(fs);
2692
2693         fs->super->s_state |= EXT2_VALID_FS;
2694         /* mark super block and block bitmap as dirty */
2695         ext2fs_mark_super_dirty(fs);
2696         ext2fs_mark_bb_dirty(fs);
2697
2698 err_out:
2699         free_blk_move_list();
2700         ext2fs_free_block_bitmap(bmap);
2701
2702         return retval;
2703
2704 err_out_undo:
2705         free_blk_move_list();
2706         ext2fs_free_block_bitmap(bmap);
2707         fputs(_("Error in resizing the inode size.\n"
2708                         "Run e2undo to undo the "
2709                         "file system changes. \n"), stderr);
2710
2711         return retval;
2712 }
2713
2714 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2715 {
2716         errcode_t retval = 0;
2717         const char *tdb_dir;
2718         char *tdb_file = NULL;
2719         char *dev_name, *tmp_name;
2720
2721         /* (re)open a specific undo file */
2722         if (undo_file && undo_file[0] != 0) {
2723                 retval = set_undo_io_backing_manager(*io_ptr);
2724                 if (retval)
2725                         goto err;
2726                 *io_ptr = undo_io_manager;
2727                 retval = set_undo_io_backup_file(undo_file);
2728                 if (retval)
2729                         goto err;
2730                 printf(_("Overwriting existing filesystem; this can be undone "
2731                          "using the command:\n"
2732                          "    e2undo %s %s\n\n"),
2733                          undo_file, name);
2734                 return retval;
2735         }
2736
2737         /*
2738          * Configuration via a conf file would be
2739          * nice
2740          */
2741         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2742         if (!tdb_dir)
2743                 tdb_dir = "/var/lib/e2fsprogs";
2744
2745         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2746             access(tdb_dir, W_OK))
2747                 return 0;
2748
2749         tmp_name = strdup(name);
2750         if (!tmp_name)
2751                 goto errout;
2752         dev_name = basename(tmp_name);
2753         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2754         if (!tdb_file) {
2755                 free(tmp_name);
2756                 goto errout;
2757         }
2758         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2759         free(tmp_name);
2760
2761         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2762                 retval = errno;
2763                 com_err(program_name, retval,
2764                         _("while trying to delete %s"), tdb_file);
2765                 goto errout;
2766         }
2767
2768         retval = set_undo_io_backing_manager(*io_ptr);
2769         if (retval)
2770                 goto errout;
2771         *io_ptr = undo_io_manager;
2772         retval = set_undo_io_backup_file(tdb_file);
2773         if (retval)
2774                 goto errout;
2775         printf(_("Overwriting existing filesystem; this can be undone "
2776                  "using the command:\n"
2777                  "    e2undo %s %s\n\n"),
2778                  tdb_file, name);
2779
2780         free(tdb_file);
2781         return 0;
2782 errout:
2783         free(tdb_file);
2784 err:
2785         com_err("tune2fs", retval, "while trying to setup undo file\n");
2786         return retval;
2787 }
2788
2789 static int
2790 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2791 {
2792         int retval, nr_users, start;
2793         journal_superblock_t *jsb;
2794         ext2_filsys jfs;
2795         __u8 *j_uuid;
2796         char *journal_path;
2797         char uuid[UUID_STR_SIZE];
2798         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2799
2800         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2801                 return 0;
2802
2803         uuid_unparse(sb->s_journal_uuid, uuid);
2804         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2805         if (!journal_path)
2806                 return 0;
2807
2808         retval = ext2fs_open2(journal_path, io_options,
2809                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2810                               0, 0, unix_io_manager, &jfs);
2811         if (retval) {
2812                 com_err(program_name, retval,
2813                         _("while trying to open %s"),
2814                         journal_path);
2815                 return retval;
2816         }
2817
2818         retval = get_journal_sb(jfs, buf);
2819         if (retval != 0) {
2820                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2821                         fprintf(stderr, _("%s is not a journal device.\n"),
2822                                 journal_path);
2823                 return retval;
2824         }
2825
2826         jsb = (journal_superblock_t *) buf;
2827         /* Find the filesystem UUID */
2828         nr_users = ntohl(jsb->s_nr_users);
2829         if (nr_users > JFS_USERS_MAX) {
2830                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2831                                  "is too high (%d).\n"), nr_users);
2832                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2833         }
2834
2835         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2836         if (j_uuid == NULL) {
2837                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2838                       stderr);
2839                 return EXT2_ET_LOAD_EXT_JOURNAL;
2840         }
2841
2842         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2843
2844         start = ext2fs_journal_sb_start(jfs->blocksize);
2845         /* Write back the journal superblock */
2846         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2847         if (retval != 0) {
2848                 com_err(program_name, retval,
2849                         "while writing journal superblock.");
2850                 return retval;
2851         }
2852
2853         ext2fs_close(jfs);
2854
2855         return 0;
2856 }
2857
2858 #ifndef BUILD_AS_LIB
2859 int main(int argc, char **argv)
2860 #else
2861 int tune2fs_main(int argc, char **argv)
2862 #endif  /* BUILD_AS_LIB */
2863 {
2864         errcode_t retval;
2865         ext2_filsys fs;
2866         struct ext2_super_block *sb;
2867         io_manager io_ptr, io_ptr_orig = NULL;
2868         int rc = 0;
2869         char default_undo_file[1] = { 0 };
2870
2871 #ifdef ENABLE_NLS
2872         setlocale(LC_MESSAGES, "");
2873         setlocale(LC_CTYPE, "");
2874         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2875         textdomain(NLS_CAT_NAME);
2876         set_com_err_gettext(gettext);
2877 #endif
2878         if (argc && *argv)
2879                 program_name = *argv;
2880         add_error_table(&et_ext2_error_table);
2881
2882 #ifdef CONFIG_BUILD_FINDFS
2883         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2884                 do_findfs(argc, argv);
2885 #endif
2886         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2887                 parse_e2label_options(argc, argv);
2888         else
2889                 parse_tune2fs_options(argc, argv);
2890
2891 #ifdef CONFIG_TESTIO_DEBUG
2892         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2893                 io_ptr = test_io_manager;
2894                 test_io_backing_manager = unix_io_manager;
2895         } else
2896 #endif
2897                 io_ptr = unix_io_manager;
2898
2899 retry_open:
2900         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2901                 open_flag |= EXT2_FLAG_SKIP_MMP;
2902
2903         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2904
2905         /* keep the filesystem struct around to dump MMP data */
2906         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2907
2908         retval = ext2fs_open2(device_name, io_options, open_flag,
2909                               0, 0, io_ptr, &fs);
2910         if (retval) {
2911                 com_err(program_name, retval,
2912                         _("while trying to open %s"),
2913                         device_name);
2914                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2915                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2916                         dump_mmp_msg(fs->mmp_buf,
2917                                      _("If you are sure the filesystem "
2918                                        "is not in use on any node, run:\n"
2919                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2920                 else if (retval == EXT2_ET_MMP_FAILED)
2921                         dump_mmp_msg(fs->mmp_buf, NULL);
2922                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2923                         fprintf(stderr,
2924                                 _("MMP block magic is bad. Try to fix it by "
2925                                   "running:\n'e2fsck -f %s'\n"), device_name);
2926                 else if (retval == EXT2_ET_BAD_MAGIC)
2927                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2928                 else if (retval != EXT2_ET_MMP_FAILED)
2929                         fprintf(stderr, "%s",
2930                              _("Couldn't find valid filesystem superblock.\n"));
2931
2932                 ext2fs_free(fs);
2933                 exit(1);
2934         }
2935         if (ext2fs_has_feature_journal_dev(fs->super)) {
2936                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2937                 ext2fs_free(fs);
2938                 exit(1);
2939         }
2940         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2941
2942         if (I_flag) {
2943                 /*
2944                  * Check the inode size is right so we can issue an
2945                  * error message and bail before setting up the tdb
2946                  * file.
2947                  */
2948                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2949                         fprintf(stderr, _("The inode size is already %lu\n"),
2950                                 new_inode_size);
2951                         rc = 1;
2952                         goto closefs;
2953                 }
2954                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2955                         fprintf(stderr, "%s",
2956                                 _("Shrinking inode size is not supported\n"));
2957                         rc = 1;
2958                         goto closefs;
2959                 }
2960                 if (new_inode_size > fs->blocksize) {
2961                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2962                                 new_inode_size, fs->blocksize);
2963                         rc = 1;
2964                         goto closefs;
2965                 }
2966                 rc = check_fsck_needed(fs,
2967                         _("Resizing inodes could take some time."));
2968                 if (rc)
2969                         goto closefs;
2970                 /*
2971                  * If inode resize is requested use the
2972                  * Undo I/O manager
2973                  */
2974                 undo_file = default_undo_file;
2975         }
2976
2977         /* Set up an undo file */
2978         if (undo_file && io_ptr_orig == NULL) {
2979                 io_ptr_orig = io_ptr;
2980                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2981                 if (retval) {
2982                         rc = 1;
2983                         goto closefs;
2984                 }
2985                 if (io_ptr != io_ptr_orig) {
2986                         ext2fs_close_free(&fs);
2987                         goto retry_open;
2988                 }
2989         }
2990
2991         sb = fs->super;
2992         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2993
2994         if (print_label) {
2995                 /* For e2label emulation */
2996                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
2997                 remove_error_table(&et_ext2_error_table);
2998                 goto closefs;
2999         }
3000
3001         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3002         if (retval) {
3003                 com_err("ext2fs_check_if_mount", retval,
3004                         _("while determining whether %s is mounted."),
3005                         device_name);
3006                 rc = 1;
3007                 goto closefs;
3008         }
3009
3010 #ifdef NO_RECOVERY
3011         /* Warn if file system needs recovery and it is opened for writing. */
3012         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3013             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3014             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3015                 fprintf(stderr,
3016 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3017   "\te2fsck -E journal_only %s\n\n"
3018   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3019   "by journal recovery.\n"), device_name);
3020         }
3021 #else
3022         /* Recover the journal if possible. */
3023         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3024             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3025                 printf(_("Recovering journal.\n"));
3026                 retval = ext2fs_run_ext3_journal(&fs);
3027                 if (retval) {
3028                         com_err("tune2fs", retval,
3029                                 "while recovering journal.\n");
3030                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3031                         if (fs)
3032                                 ext2fs_close_free(&fs);
3033                         rc = 1;
3034                         goto closefs;
3035                 }
3036                 sb = fs->super;
3037         }
3038 #endif
3039
3040         /* Normally we only need to write out the superblock */
3041         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3042
3043         if (c_flag) {
3044                 sb->s_max_mnt_count = max_mount_count;
3045                 ext2fs_mark_super_dirty(fs);
3046                 printf(_("Setting maximal mount count to %d\n"),
3047                        max_mount_count);
3048         }
3049         if (C_flag) {
3050                 sb->s_mnt_count = mount_count;
3051                 ext2fs_mark_super_dirty(fs);
3052                 printf(_("Setting current mount count to %d\n"), mount_count);
3053         }
3054         if (e_flag) {
3055                 sb->s_errors = errors;
3056                 ext2fs_mark_super_dirty(fs);
3057                 printf(_("Setting error behavior to %d\n"), errors);
3058         }
3059         if (g_flag) {
3060                 sb->s_def_resgid = resgid;
3061                 ext2fs_mark_super_dirty(fs);
3062                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3063         }
3064         if (i_flag) {
3065                 if ((unsigned long long)interval >= (1ULL << 32)) {
3066                         com_err(program_name, 0,
3067                                 _("interval between checks is too big (%lu)"),
3068                                 interval);
3069                         rc = 1;
3070                         goto closefs;
3071                 }
3072                 sb->s_checkinterval = interval;
3073                 ext2fs_mark_super_dirty(fs);
3074                 printf(_("Setting interval between checks to %lu seconds\n"),
3075                        interval);
3076         }
3077         if (m_flag) {
3078                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3079                                           ext2fs_blocks_count(sb) / 100.0);
3080                 ext2fs_mark_super_dirty(fs);
3081                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3082                         reserved_ratio, ext2fs_r_blocks_count(sb));
3083         }
3084         if (r_flag) {
3085                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3086                         com_err(program_name, 0,
3087                                 _("reserved blocks count is too big (%llu)"),
3088                                 reserved_blocks);
3089                         rc = 1;
3090                         goto closefs;
3091                 }
3092                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3093                 ext2fs_mark_super_dirty(fs);
3094                 printf(_("Setting reserved blocks count to %llu\n"),
3095                        reserved_blocks);
3096         }
3097         if (s_flag == 1) {
3098                 if (ext2fs_has_feature_sparse_super(sb)) {
3099                         fputs(_("\nThe filesystem already has sparse "
3100                                 "superblocks.\n"), stderr);
3101                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3102                         fputs(_("\nSetting the sparse superblock flag not "
3103                                 "supported\nfor filesystems with "
3104                                 "the meta_bg feature enabled.\n"),
3105                                 stderr);
3106                         rc = 1;
3107                         goto closefs;
3108                 } else {
3109                         ext2fs_set_feature_sparse_super(sb);
3110                         sb->s_state &= ~EXT2_VALID_FS;
3111                         ext2fs_mark_super_dirty(fs);
3112                         printf(_("\nSparse superblock flag set.  %s"),
3113                                _(please_fsck));
3114                 }
3115         }
3116         if (s_flag == 0) {
3117                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3118                       stderr);
3119                 rc = 1;
3120                 goto closefs;
3121         }
3122         if (T_flag) {
3123                 sb->s_lastcheck = last_check_time;
3124                 ext2fs_mark_super_dirty(fs);
3125                 printf(_("Setting time filesystem last checked to %s\n"),
3126                        ctime(&last_check_time));
3127         }
3128         if (u_flag) {
3129                 sb->s_def_resuid = resuid;
3130                 ext2fs_mark_super_dirty(fs);
3131                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3132         }
3133         if (L_flag) {
3134                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3135                         fputs(_("Warning: label too long, truncating.\n"),
3136                               stderr);
3137                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3138                 strncpy((char *)sb->s_volume_name, new_label,
3139                         sizeof(sb->s_volume_name));
3140                 ext2fs_mark_super_dirty(fs);
3141         }
3142         if (M_flag) {
3143                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3144                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3145                         sizeof(sb->s_last_mounted));
3146                 ext2fs_mark_super_dirty(fs);
3147         }
3148         if (mntopts_cmd) {
3149                 rc = update_mntopts(fs, mntopts_cmd);
3150                 if (rc)
3151                         goto closefs;
3152         }
3153         if (features_cmd) {
3154                 rc = update_feature_set(fs, features_cmd);
3155                 if (rc)
3156                         goto closefs;
3157         }
3158         if (extended_cmd) {
3159                 rc = parse_extended_opts(fs, extended_cmd);
3160                 if (rc)
3161                         goto closefs;
3162                 if (clear_mmp && !f_flag) {
3163                         fputs(_("Error in using clear_mmp. "
3164                                 "It must be used with -f\n"),
3165                               stderr);
3166                         goto closefs;
3167                 }
3168         }
3169         if (clear_mmp) {
3170                 rc = ext2fs_mmp_clear(fs);
3171                 goto closefs;
3172         }
3173         if (journal_size || journal_device) {
3174                 rc = add_journal(fs);
3175                 if (rc)
3176                         goto closefs;
3177         }
3178
3179         if (Q_flag) {
3180                 if (mount_flags & EXT2_MF_MOUNTED) {
3181                         fputs(_("The quota feature may only be changed when "
3182                                 "the filesystem is unmounted.\n"), stderr);
3183                         rc = 1;
3184                         goto closefs;
3185                 }
3186                 rc = handle_quota_options(fs);
3187                 if (rc)
3188                         goto closefs;
3189         }
3190
3191         if (U_flag) {
3192                 int set_csum = 0;
3193                 dgrp_t i;
3194                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3195                 __u8 old_uuid[UUID_SIZE];
3196
3197                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3198                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3199                      ext2fs_has_feature_ea_inode(fs->super))) {
3200                         rc = check_fsck_needed(fs,
3201                                 _("Setting the UUID on this "
3202                                   "filesystem could take some time."));
3203                         if (rc)
3204                                 goto closefs;
3205                         rewrite_checksums = 1;
3206                 }
3207
3208                 if (ext2fs_has_group_desc_csum(fs)) {
3209                         /*
3210                          * Changing the UUID on a metadata_csum FS requires
3211                          * rewriting all metadata, which can race with a
3212                          * mounted fs.  Don't allow that unless we're saving
3213                          * the checksum seed.
3214                          */
3215                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3216                             !ext2fs_has_feature_csum_seed(fs->super) &&
3217                             ext2fs_has_feature_metadata_csum(fs->super)) {
3218                                 fputs(_("The UUID may only be "
3219                                         "changed when the filesystem is "
3220                                         "unmounted.\n"), stderr);
3221                                 fputs(_("If you only use kernels newer than "
3222                                         "v4.4, run 'tune2fs -O "
3223                                         "metadata_csum_seed' and re-run this "
3224                                         "command.\n"), stderr);
3225                                 try_confirm_csum_seed_support();
3226                                 rc = 1;
3227                                 goto closefs;
3228                         }
3229
3230                         /*
3231                          * Determine if the block group checksums are
3232                          * correct so we know whether or not to set
3233                          * them later on.
3234                          */
3235                         for (i = 0; i < fs->group_desc_count; i++)
3236                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3237                                         break;
3238                         if (i >= fs->group_desc_count)
3239                                 set_csum = 1;
3240                 }
3241
3242                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3243                 if ((strcasecmp(new_UUID, "null") == 0) ||
3244                     (strcasecmp(new_UUID, "clear") == 0)) {
3245                         uuid_clear(sb->s_uuid);
3246                 } else if (strcasecmp(new_UUID, "time") == 0) {
3247                         uuid_generate_time(sb->s_uuid);
3248                 } else if (strcasecmp(new_UUID, "random") == 0) {
3249                         uuid_generate(sb->s_uuid);
3250                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3251                         com_err(program_name, 0, "%s",
3252                                 _("Invalid UUID format\n"));
3253                         rc = 1;
3254                         goto closefs;
3255                 }
3256                 ext2fs_init_csum_seed(fs);
3257                 if (set_csum) {
3258                         for (i = 0; i < fs->group_desc_count; i++)
3259                                 ext2fs_group_desc_csum_set(fs, i);
3260                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3261                 }
3262
3263                 /* If this is a journal dev, we need to copy UUID into jsb */
3264                 if (!(rc = get_journal_sb(fs, buf))) {
3265                         journal_superblock_t *jsb;
3266
3267                         jsb = (journal_superblock_t *) buf;
3268                         fputs(_("Need to update journal superblock.\n"), stdout);
3269                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3270
3271                         /* Writeback the journal superblock */
3272                         if ((rc = io_channel_write_blk64(fs->io,
3273                                 ext2fs_journal_sb_start(fs->blocksize),
3274                                         -SUPERBLOCK_SIZE, buf)))
3275                                 goto closefs;
3276                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3277                         goto closefs;
3278                 else {
3279                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3280
3281                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3282                                 goto closefs;
3283                 }
3284
3285                 ext2fs_mark_super_dirty(fs);
3286         }
3287
3288         if (I_flag) {
3289                 if (mount_flags & EXT2_MF_MOUNTED) {
3290                         fputs(_("The inode size may only be "
3291                                 "changed when the filesystem is "
3292                                 "unmounted.\n"), stderr);
3293                         rc = 1;
3294                         goto closefs;
3295                 }
3296                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3297                         fputs(_("Changing the inode size not supported for "
3298                                 "filesystems with the flex_bg\n"
3299                                 "feature enabled.\n"),
3300                               stderr);
3301                         rc = 1;
3302                         goto closefs;
3303                 }
3304                 /*
3305                  * We want to update group descriptor also
3306                  * with the new free inode count
3307                  */
3308                 if (rewrite_checksums)
3309                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3310                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3311                 retval = resize_inode(fs, new_inode_size);
3312                 if (rewrite_checksums)
3313                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3314                 if (retval == 0) {
3315                         printf(_("Setting inode size %lu\n"),
3316                                                         new_inode_size);
3317                         rewrite_checksums = 1;
3318                 } else {
3319                         printf("%s", _("Failed to change inode size\n"));
3320                         rc = 1;
3321                         goto closefs;
3322                 }
3323         }
3324
3325         if (rewrite_checksums)
3326                 rewrite_metadata_checksums(fs);
3327
3328         if (l_flag)
3329                 list_super(sb);
3330         if (stride_set) {
3331                 sb->s_raid_stride = stride;
3332                 ext2fs_mark_super_dirty(fs);
3333                 printf(_("Setting stride size to %d\n"), stride);
3334         }
3335         if (stripe_width_set) {
3336                 sb->s_raid_stripe_width = stripe_width;
3337                 ext2fs_mark_super_dirty(fs);
3338                 printf(_("Setting stripe width to %d\n"), stripe_width);
3339         }
3340         if (ext_mount_opts) {
3341                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3342                         sizeof(fs->super->s_mount_opts));
3343                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3344                 ext2fs_mark_super_dirty(fs);
3345                 printf(_("Setting extended default mount options to '%s'\n"),
3346                        ext_mount_opts);
3347                 free(ext_mount_opts);
3348         }
3349
3350         free(device_name);
3351         remove_error_table(&et_ext2_error_table);
3352
3353 closefs:
3354         if (rc) {
3355                 ext2fs_mmp_stop(fs);
3356 #ifndef BUILD_AS_LIB
3357                 exit(1);
3358 #endif
3359         }
3360
3361         if (feature_64bit)
3362                 convert_64bit(fs, feature_64bit);
3363         return (ext2fs_close_free(&fs) ? 1 : 0);
3364 }