misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104 int enabling_casefold;
 105
 106 int journal_size, journal_flags;
 107 char *journal_device;
 108 static blk64_t journal_location = ~0LL;
 109
 110 static struct list_head blk_move_list;
 111
 112 struct blk_move {
 113         struct list_head list;
 114         blk64_t old_loc;
 115         blk64_t new_loc;
 116 };
 117
 118 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 119
 120 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 121
 122 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 123 static const char *please_dir_fsck =
 124                 N_("Please run e2fsck -fD on the filesystem.\n");
 125
 126 #ifdef CONFIG_BUILD_FINDFS
 127 void do_findfs(int argc, char **argv);
 128 #endif
 129
 130 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 131 int journal_enable_debug = -1;
 132 #endif
 133
 134 static void usage(void)
 135 {
 136         fprintf(stderr,
 137                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 138                   "[-g group]\n"
 139                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 140                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 141                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 142                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 143                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 144                   "\t[-E extended-option[,...]] [-T last_check_time] "
 145                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 146                 program_name);
 147         exit(1);
 148 }
 149
 150 static __u32 ok_features[3] = {
 151         /* Compat */
 152         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 153                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 154         /* Incompat */
 155         EXT2_FEATURE_INCOMPAT_FILETYPE |
 156                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 157                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 158                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 159                 EXT4_FEATURE_INCOMPAT_MMP |
 160                 EXT4_FEATURE_INCOMPAT_64BIT |
 161                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 162                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 163                 EXT4_FEATURE_INCOMPAT_LARGEDIR |
 164                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 165         /* R/O compat */
 166         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 167                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 168                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 169                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 170                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 171                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 172                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 173                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 174                 EXT4_FEATURE_RO_COMPAT_READONLY |
 175                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 176                 EXT4_FEATURE_RO_COMPAT_VERITY
 177 };
 178
 179 static __u32 clear_ok_features[3] = {
 180         /* Compat */
 181         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 182                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 183                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 184         /* Incompat */
 185         EXT2_FEATURE_INCOMPAT_FILETYPE |
 186                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 187                 EXT4_FEATURE_INCOMPAT_MMP |
 188                 EXT4_FEATURE_INCOMPAT_64BIT |
 189                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 190         /* R/O compat */
 191         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 192                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 193                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 194                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 195                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 196                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 197                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 198                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 199                 EXT4_FEATURE_RO_COMPAT_READONLY
 200 };
 201
 202 /**
 203  * Try to get journal super block if any
 204  */
 205 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 206 {
 207         int retval;
 208         journal_superblock_t *jsb;
 209
 210         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 211                 return EXT2_ET_UNSUPP_FEATURE;
 212         }
 213
 214         /* Get the journal superblock */
 215         if ((retval = io_channel_read_blk64(jfs->io,
 216             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 217                 com_err(program_name, retval, "%s",
 218                 _("while reading journal superblock"));
 219                 return retval;
 220         }
 221
 222         jsb = (journal_superblock_t *) buf;
 223         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 224             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 225                 fputs(_("Journal superblock not found!\n"), stderr);
 226                 return EXT2_ET_BAD_MAGIC;
 227         }
 228
 229         return 0;
 230 }
 231
 232 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 233                           int nr_users)
 234 {
 235         int i;
 236         for (i = 0; i < nr_users; i++) {
 237                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 238                         return &s_users[i * UUID_SIZE];
 239         }
 240
 241         return NULL;
 242 }
 243
 244 /*
 245  * Remove an external journal from the filesystem
 246  */
 247 static int remove_journal_device(ext2_filsys fs)
 248 {
 249         char            *journal_path;
 250         ext2_filsys     jfs;
 251         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 252         journal_superblock_t    *jsb;
 253         int             i, nr_users;
 254         errcode_t       retval;
 255         int             commit_remove_journal = 0;
 256         io_manager      io_ptr;
 257
 258         if (f_flag)
 259                 commit_remove_journal = 1; /* force removal even if error */
 260
 261         uuid_unparse(fs->super->s_journal_uuid, buf);
 262         journal_path = blkid_get_devname(NULL, "UUID", buf);
 263
 264         if (!journal_path) {
 265                 journal_path =
 266                         ext2fs_find_block_device(fs->super->s_journal_dev);
 267                 if (!journal_path)
 268                         goto no_valid_journal;
 269         }
 270
 271 #ifdef CONFIG_TESTIO_DEBUG
 272         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 273                 io_ptr = test_io_manager;
 274                 test_io_backing_manager = unix_io_manager;
 275         } else
 276 #endif
 277                 io_ptr = unix_io_manager;
 278         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 279                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 280                              fs->blocksize, io_ptr, &jfs);
 281         if (retval) {
 282                 com_err(program_name, retval, "%s",
 283                         _("while trying to open external journal"));
 284                 goto no_valid_journal;
 285         }
 286
 287         if ((retval = get_journal_sb(jfs, buf))) {
 288                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 289                         fprintf(stderr, _("%s is not a journal device.\n"),
 290                                 journal_path);
 291                 goto no_valid_journal;
 292         }
 293
 294         jsb = (journal_superblock_t *) buf;
 295         /* Find the filesystem UUID */
 296         nr_users = ntohl(jsb->s_nr_users);
 297         if (nr_users > JFS_USERS_MAX) {
 298                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 299                                  "is too high (%d).\n"), nr_users);
 300                 commit_remove_journal = 1;
 301                 goto no_valid_journal;
 302         }
 303
 304         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 305                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 306                       stderr);
 307                 commit_remove_journal = 1;
 308                 goto no_valid_journal;
 309         }
 310         nr_users--;
 311         for (i = 0; i < nr_users; i++)
 312                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 313         jsb->s_nr_users = htonl(nr_users);
 314
 315         /* Write back the journal superblock */
 316         retval = io_channel_write_blk64(jfs->io,
 317                                         ext2fs_journal_sb_start(fs->blocksize),
 318                                         -SUPERBLOCK_SIZE, buf);
 319         if (retval) {
 320                 com_err(program_name, retval,
 321                         "while writing journal superblock.");
 322                 goto no_valid_journal;
 323         }
 324
 325         commit_remove_journal = 1;
 326
 327 no_valid_journal:
 328         if (commit_remove_journal == 0) {
 329                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 330                         "Use -f option to remove missing journal device.\n"),
 331                       stderr);
 332                 return 1;
 333         }
 334         fs->super->s_journal_dev = 0;
 335         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 336         uuid_clear(fs->super->s_journal_uuid);
 337         ext2fs_mark_super_dirty(fs);
 338         fputs(_("Journal removed\n"), stdout);
 339         free(journal_path);
 340
 341         return 0;
 342 }
 343
 344 /* Helper function for remove_journal_inode */
 345 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 346                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 347                                blk64_t ref_block EXT2FS_ATTR((unused)),
 348                                int ref_offset EXT2FS_ATTR((unused)),
 349                                void *private EXT2FS_ATTR((unused)))
 350 {
 351         blk64_t block;
 352         int     group;
 353
 354         block = *blocknr;
 355         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 356         group = ext2fs_group_of_blk2(fs, block);
 357         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 358         ext2fs_group_desc_csum_set(fs, group);
 359         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 360         return 0;
 361 }
 362
 363 /*
 364  * Remove the journal inode from the filesystem
 365  */
 366 static errcode_t remove_journal_inode(ext2_filsys fs)
 367 {
 368         struct ext2_inode       inode;
 369         errcode_t               retval;
 370         ext2_ino_t              ino = fs->super->s_journal_inum;
 371
 372         retval = ext2fs_read_inode(fs, ino,  &inode);
 373         if (retval) {
 374                 com_err(program_name, retval, "%s",
 375                         _("while reading journal inode"));
 376                 return retval;
 377         }
 378         if (ino == EXT2_JOURNAL_INO) {
 379                 retval = ext2fs_read_bitmaps(fs);
 380                 if (retval) {
 381                         com_err(program_name, retval, "%s",
 382                                 _("while reading bitmaps"));
 383                         return retval;
 384                 }
 385                 retval = ext2fs_block_iterate3(fs, ino,
 386                                                BLOCK_FLAG_READ_ONLY, NULL,
 387                                                release_blocks_proc, NULL);
 388                 if (retval) {
 389                         com_err(program_name, retval, "%s",
 390                                 _("while clearing journal inode"));
 391                         return retval;
 392                 }
 393                 memset(&inode, 0, sizeof(inode));
 394                 ext2fs_mark_bb_dirty(fs);
 395                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 396         } else
 397                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 398         retval = ext2fs_write_inode(fs, ino, &inode);
 399         if (retval) {
 400                 com_err(program_name, retval, "%s",
 401                         _("while writing journal inode"));
 402                 return retval;
 403         }
 404         fs->super->s_journal_inum = 0;
 405         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 406         ext2fs_mark_super_dirty(fs);
 407
 408         return 0;
 409 }
 410
 411 /*
 412  * Update the default mount options
 413  */
 414 static int update_mntopts(ext2_filsys fs, char *mntopts)
 415 {
 416         struct ext2_super_block *sb = fs->super;
 417
 418         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 419                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 420                         mntopts);
 421                 return 1;
 422         }
 423         ext2fs_mark_super_dirty(fs);
 424
 425         return 0;
 426 }
 427
 428 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 429 {
 430         /* Refuse to modify anything but a freshly checked valid filesystem. */
 431         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 432             (fs->super->s_state & EXT2_ERROR_FS) ||
 433             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 434                 puts(_(fsck_explain));
 435                 puts(_(please_fsck));
 436                 if (mount_flags & EXT2_MF_READONLY)
 437                         printf("%s", _("(and reboot afterwards!)\n"));
 438                 return 1;
 439         }
 440
 441         /* Give the admin a few seconds to bail out of a dangerous op. */
 442         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 443                 return 0;
 444
 445         puts(prompt);
 446         proceed_question(5);
 447
 448         return 0;
 449 }
 450
 451 static void request_dir_fsck_afterwards(ext2_filsys fs)
 452 {
 453         static int requested;
 454
 455         if (requested++)
 456                 return;
 457         fsck_requested++;
 458         fs->super->s_state &= ~EXT2_VALID_FS;
 459         puts(_(fsck_explain));
 460         puts(_(please_dir_fsck));
 461         if (mount_flags & EXT2_MF_READONLY)
 462                 printf("%s", _("(and reboot afterwards!)\n"));
 463 }
 464
 465 static void request_fsck_afterwards(ext2_filsys fs)
 466 {
 467         static int requested = 0;
 468
 469         if (requested++)
 470                 return;
 471         fsck_requested++;
 472         fs->super->s_state &= ~EXT2_VALID_FS;
 473         printf("\n%s\n", _(please_fsck));
 474         if (mount_flags & EXT2_MF_READONLY)
 475                 printf("%s", _("(and reboot afterwards!)\n"));
 476 }
 477
 478 static void convert_64bit(ext2_filsys fs, int direction)
 479 {
 480         /*
 481          * Is resize2fs going to demand a fsck run? Might as well tell the
 482          * user now.
 483          */
 484         if (!fsck_requested &&
 485             ((fs->super->s_state & EXT2_ERROR_FS) ||
 486              !(fs->super->s_state & EXT2_VALID_FS) ||
 487              fs->super->s_lastcheck < fs->super->s_mtime))
 488                 request_fsck_afterwards(fs);
 489         if (fsck_requested)
 490                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 491                         direction > 0 ? "-b" : "-s", fs->device_name);
 492         else
 493                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 494                         direction > 0 ? "-b" : "-s", fs->device_name);
 495
 496         if (undo_file)
 497                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 498         if (direction > 0)
 499                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 500         else
 501                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 502 }
 503
 504 /*
 505  * Rewrite directory blocks with checksums
 506  */
 507 struct rewrite_dir_context {
 508         char *buf;
 509         errcode_t errcode;
 510         ext2_ino_t dir;
 511         int is_htree;
 512 };
 513
 514 static int rewrite_dir_block(ext2_filsys fs,
 515                              blk64_t    *blocknr,
 516                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 517                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 518                              int        ref_offset EXT2FS_ATTR((unused)),
 519                              void       *priv_data)
 520 {
 521         struct ext2_dx_countlimit *dcl = NULL;
 522         struct rewrite_dir_context *ctx = priv_data;
 523         int dcl_offset, changed = 0;
 524
 525         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 526                                               ctx->dir);
 527         if (ctx->errcode)
 528                 return BLOCK_ABORT;
 529
 530         /* if htree node... */
 531         if (ctx->is_htree)
 532                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 533                                          &dcl, &dcl_offset);
 534         if (dcl) {
 535                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 536                         /* Ensure limit is the max size */
 537                         int max_entries = (fs->blocksize - dcl_offset) /
 538                                           sizeof(struct ext2_dx_entry);
 539                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 540                                 changed = 1;
 541                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 542                         }
 543                 } else {
 544                         /* If htree block is full then rebuild the dir */
 545                         if (ext2fs_le16_to_cpu(dcl->count) ==
 546                             ext2fs_le16_to_cpu(dcl->limit)) {
 547                                 request_dir_fsck_afterwards(fs);
 548                                 return 0;
 549                         }
 550                         /*
 551                          * Ensure dcl->limit is small enough to leave room for
 552                          * the checksum tail.
 553                          */
 554                         int max_entries = (fs->blocksize - (dcl_offset +
 555                                                 sizeof(struct ext2_dx_tail))) /
 556                                           sizeof(struct ext2_dx_entry);
 557                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 558                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 559                         /* Always rewrite checksum */
 560                         changed = 1;
 561                 }
 562         } else {
 563                 unsigned int rec_len, name_size;
 564                 char *top = ctx->buf + fs->blocksize;
 565                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 566                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 567
 568                 /* Find last and penultimate dirent */
 569                 while ((char *)de < top) {
 570                         penultimate_de = last_de;
 571                         last_de = de;
 572                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 573                         if (!ctx->errcode && !rec_len)
 574                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 575                         if (ctx->errcode)
 576                                 return BLOCK_ABORT;
 577                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 578                 }
 579                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 580                 if (ctx->errcode)
 581                         return BLOCK_ABORT;
 582                 name_size = ext2fs_dirent_name_len(last_de);
 583
 584                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 585                         if (!penultimate_de)
 586                                 return 0;
 587                         if (last_de->inode ||
 588                             name_size ||
 589                             rec_len != sizeof(struct ext2_dir_entry_tail))
 590                                 return 0;
 591                         /*
 592                          * The last dirent is unused and the right length to
 593                          * have stored a checksum.  Erase it.
 594                          */
 595                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 596                                                           &rec_len);
 597                         if (!rec_len)
 598                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 599                         if (ctx->errcode)
 600                                 return BLOCK_ABORT;
 601                         ext2fs_set_rec_len(fs, rec_len +
 602                                         sizeof(struct ext2_dir_entry_tail),
 603                                         penultimate_de);
 604                         changed = 1;
 605                 } else {
 606                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 607                         struct ext2_dir_entry_tail *t;
 608
 609                         /*
 610                          * If the last dirent looks like the tail, just update
 611                          * the checksum.
 612                          */
 613                         if (!last_de->inode &&
 614                             rec_len == csum_size) {
 615                                 t = (struct ext2_dir_entry_tail *)last_de;
 616                                 t->det_reserved_name_len =
 617                                                 EXT2_DIR_NAME_LEN_CSUM;
 618                                 changed = 1;
 619                                 goto out;
 620                         }
 621                         if (name_size & 3)
 622                                 name_size = (name_size & ~3) + 4;
 623                         /* If there's not enough space for the tail, e2fsck */
 624                         if (rec_len <= (8 + name_size + csum_size)) {
 625                                 request_dir_fsck_afterwards(fs);
 626                                 return 0;
 627                         }
 628                         /* Shorten that last de and insert the tail */
 629                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 630                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 631                         ext2fs_initialize_dirent_tail(fs, t);
 632
 633                         /* Always update checksum */
 634                         changed = 1;
 635                 }
 636         }
 637
 638 out:
 639         if (!changed)
 640                 return 0;
 641
 642         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 643                                                0, ctx->dir);
 644         if (ctx->errcode)
 645                 return BLOCK_ABORT;
 646
 647         return 0;
 648 }
 649
 650 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 651                                    struct ext2_inode *inode)
 652 {
 653         errcode_t       retval;
 654         struct rewrite_dir_context ctx;
 655
 656         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 657         if (retval)
 658                 return retval;
 659
 660         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 661         ctx.dir = dir;
 662         ctx.errcode = 0;
 663         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 664                                                 BLOCK_FLAG_DATA_ONLY,
 665                                        0, rewrite_dir_block, &ctx);
 666
 667         ext2fs_free_mem(&ctx.buf);
 668         if (retval)
 669                 return retval;
 670
 671         return ctx.errcode;
 672 }
 673
 674 /*
 675  * Context information that does not change across rewrite_one_inode()
 676  * invocations.
 677  */
 678 struct rewrite_context {
 679         ext2_filsys fs;
 680         struct ext2_inode *zero_inode;
 681         char *ea_buf;
 682         int inode_size;
 683 };
 684
 685 #define fatal_err(code, args...)                \
 686         do {                                    \
 687                 com_err(__func__, code, args);  \
 688                 exit(1);                        \
 689         } while (0);
 690
 691 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 692                                  struct ext2_inode *inode)
 693 {
 694         errcode_t retval;
 695         ext2_file_t file;
 696         __u32 hash;
 697
 698         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 699         if (retval)
 700                 fatal_err(retval, "open ea_inode");
 701         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 702                                   NULL);
 703         if (retval)
 704                 fatal_err(retval, "read ea_inode");
 705         retval = ext2fs_file_close(file);
 706         if (retval)
 707                 fatal_err(retval, "close ea_inode");
 708
 709         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 710                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 711         ext2fs_set_ea_inode_hash(inode, hash);
 712 }
 713
 714 static int update_xattr_entry_hashes(ext2_filsys fs,
 715                                      struct ext2_ext_attr_entry *entry,
 716                                      struct ext2_ext_attr_entry *end)
 717 {
 718         int modified = 0;
 719         errcode_t retval;
 720
 721         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 722                 if (entry->e_value_inum) {
 723                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 724                                                              &entry->e_hash);
 725                         if (retval)
 726                                 fatal_err(retval, "hash ea_inode entry");
 727                         modified = 1;
 728                 }
 729                 entry = EXT2_EXT_ATTR_NEXT(entry);
 730         }
 731         return modified;
 732 }
 733
 734 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 735                                        struct ext2_inode_large *inode)
 736 {
 737         struct ext2_ext_attr_entry *start, *end;
 738         __u32 *ea_magic;
 739
 740         if (inode->i_extra_isize == 0)
 741                 return;
 742
 743         if (inode->i_extra_isize & 3 ||
 744             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 745                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 746
 747         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 748                                 inode->i_extra_isize);
 749         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 750                 return;
 751
 752         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 753         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 754
 755         update_xattr_entry_hashes(ctx->fs, start, end);
 756 }
 757
 758 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 759                                       char *block_buf)
 760 {
 761         struct ext2_ext_attr_header *header;
 762         struct ext2_ext_attr_entry *start, *end;
 763
 764         header = (struct ext2_ext_attr_header *)block_buf;
 765         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 766                 return;
 767
 768         start = (struct ext2_ext_attr_entry *)(header+1);
 769         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 770
 771         if (update_xattr_entry_hashes(ctx->fs, start, end))
 772                 ext2fs_ext_attr_block_rehash(header, end);
 773 }
 774
 775 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 776                               struct ext2_inode *inode)
 777 {
 778         blk64_t file_acl_block;
 779         errcode_t retval;
 780
 781         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 782                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 783                         return;
 784                 memset(inode, 0, ctx->inode_size);
 785         }
 786
 787         if (inode->i_flags & EXT4_EA_INODE_FL)
 788                 update_ea_inode_hash(ctx, ino, inode);
 789
 790         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 791                 update_inline_xattr_hashes(ctx,
 792                                            (struct ext2_inode_large *)inode);
 793
 794         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 795         if (retval)
 796                 fatal_err(retval, "while writing inode");
 797
 798         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 799         if (retval)
 800                 fatal_err(retval, "while rewriting extents");
 801
 802         if (LINUX_S_ISDIR(inode->i_mode) &&
 803             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 804                 retval = rewrite_directory(ctx->fs, ino, inode);
 805                 if (retval)
 806                         fatal_err(retval, "while rewriting directories");
 807         }
 808
 809         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 810         if (!file_acl_block)
 811                 return;
 812
 813         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 814                                        ino);
 815         if (retval)
 816                 fatal_err(retval, "while rewriting extended attribute");
 817
 818         update_block_xattr_hashes(ctx, ctx->ea_buf);
 819         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 820                                         ino);
 821         if (retval)
 822                 fatal_err(retval, "while rewriting extended attribute");
 823 }
 824
 825 /*
 826  * Forcibly set checksums in all inodes.
 827  */
 828 static void rewrite_inodes(ext2_filsys fs)
 829 {
 830         ext2_inode_scan scan;
 831         errcode_t       retval;
 832         ext2_ino_t      ino;
 833         struct ext2_inode *inode;
 834         int pass;
 835         struct rewrite_context ctx = {
 836                 .fs = fs,
 837                 .inode_size = EXT2_INODE_SIZE(fs->super),
 838         };
 839
 840         if (fs->super->s_creator_os == EXT2_OS_HURD)
 841                 return;
 842
 843         retval = ext2fs_get_mem(ctx.inode_size, &inode);
 844         if (retval)
 845                 fatal_err(retval, "while allocating memory");
 846
 847         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 848         if (retval)
 849                 fatal_err(retval, "while allocating memory");
 850
 851         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 852         if (retval)
 853                 fatal_err(retval, "while allocating memory");
 854
 855         /*
 856          * Extended attribute inodes have a lookup hash that needs to be
 857          * recalculated with the new csum_seed. Other inodes referencing xattr
 858          * inodes need this value to be up to date. That's why we do two passes:
 859          *
 860          * pass 1: update xattr inodes to update their lookup hash as well as
 861          *         other checksums.
 862          *
 863          * pass 2: go over other inodes to update their checksums.
 864          */
 865         if (ext2fs_has_feature_ea_inode(fs->super))
 866                 pass = 1;
 867         else
 868                 pass = 2;
 869         for (;pass <= 2; pass++) {
 870                 retval = ext2fs_open_inode_scan(fs, 0, &scan);
 871                 if (retval)
 872                         fatal_err(retval, "while opening inode scan");
 873
 874                 do {
 875                         retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 876                                                             ctx.inode_size);
 877                         if (retval)
 878                                 fatal_err(retval, "while getting next inode");
 879                         if (!ino)
 880                                 break;
 881
 882                         if (((pass == 1) &&
 883                              (inode->i_flags & EXT4_EA_INODE_FL)) ||
 884                             ((pass == 2) &&
 885                              !(inode->i_flags & EXT4_EA_INODE_FL)))
 886                                 rewrite_one_inode(&ctx, ino, inode);
 887                 } while (ino);
 888
 889                 ext2fs_close_inode_scan(scan);
 890         }
 891
 892         ext2fs_free_mem(&ctx.zero_inode);
 893         ext2fs_free_mem(&ctx.ea_buf);
 894         ext2fs_free_mem(&inode);
 895 }
 896
 897 static void rewrite_metadata_checksums(ext2_filsys fs)
 898 {
 899         errcode_t retval;
 900         dgrp_t i;
 901
 902         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 903         ext2fs_init_csum_seed(fs);
 904         for (i = 0; i < fs->group_desc_count; i++)
 905                 ext2fs_group_desc_csum_set(fs, i);
 906         retval = ext2fs_read_bitmaps(fs);
 907         if (retval)
 908                 fatal_err(retval, "while reading bitmaps");
 909         rewrite_inodes(fs);
 910         ext2fs_mark_ib_dirty(fs);
 911         ext2fs_mark_bb_dirty(fs);
 912         ext2fs_mmp_update2(fs, 1);
 913         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 914         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 915         if (ext2fs_has_feature_metadata_csum(fs->super))
 916                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 917         else
 918                 fs->super->s_checksum_type = 0;
 919         ext2fs_mark_super_dirty(fs);
 920 }
 921
 922 static void enable_uninit_bg(ext2_filsys fs)
 923 {
 924         struct ext2_group_desc *gd;
 925         dgrp_t i;
 926
 927         for (i = 0; i < fs->group_desc_count; i++) {
 928                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 929                 gd->bg_itable_unused = 0;
 930                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 931                 ext2fs_group_desc_csum_set(fs, i);
 932         }
 933         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 934 }
 935
 936 static errcode_t zero_empty_inodes(ext2_filsys fs)
 937 {
 938         int length = EXT2_INODE_SIZE(fs->super);
 939         struct ext2_inode *inode = NULL;
 940         ext2_inode_scan scan;
 941         errcode_t       retval;
 942         ext2_ino_t      ino;
 943
 944         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 945         if (retval)
 946                 goto out;
 947
 948         retval = ext2fs_get_mem(length, &inode);
 949         if (retval)
 950                 goto out;
 951
 952         do {
 953                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 954                 if (retval)
 955                         goto out;
 956                 if (!ino)
 957                         break;
 958                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 959                         memset(inode, 0, length);
 960                         retval = ext2fs_write_inode_full(fs, ino, inode,
 961                                                          length);
 962                         if (retval)
 963                                 goto out;
 964                 }
 965         } while (1);
 966
 967 out:
 968         ext2fs_free_mem(&inode);
 969         ext2fs_close_inode_scan(scan);
 970         return retval;
 971 }
 972
 973 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 974 {
 975         struct ext2_group_desc *gd;
 976         dgrp_t i;
 977         errcode_t retval;
 978         blk64_t b, c, d;
 979
 980         /* Load bitmaps to ensure that the uninit ones get written out */
 981         fs->super->s_feature_ro_compat |= csum_feature_flag;
 982         retval = ext2fs_read_bitmaps(fs);
 983         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 984         if (retval) {
 985                 com_err("disable_uninit_bg", retval,
 986                         "while reading bitmaps");
 987                 request_fsck_afterwards(fs);
 988                 return retval;
 989         }
 990         ext2fs_mark_ib_dirty(fs);
 991         ext2fs_mark_bb_dirty(fs);
 992
 993         /* If we're only turning off uninit_bg, zero the inodes */
 994         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 995                 retval = zero_empty_inodes(fs);
 996                 if (retval) {
 997                         com_err("disable_uninit_bg", retval,
 998                                 "while zeroing unused inodes");
 999                         request_fsck_afterwards(fs);
1000                         return retval;
1001                 }
1002         }
1003
1004         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1005         for (i = 0; i < fs->group_desc_count; i++) {
1006                 b = ext2fs_block_bitmap_loc(fs, i);
1007                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1008                 b = ext2fs_inode_bitmap_loc(fs, i);
1009                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1010
1011                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1012                 if (retval == 0 && b)
1013                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1014                 if (retval == 0 && c)
1015                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1016                 if (retval == 0 && d)
1017                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1018                 if (retval) {
1019                         com_err("disable_uninit_bg", retval,
1020                                 "while initializing block bitmaps");
1021                         request_fsck_afterwards(fs);
1022                 }
1023
1024                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1025                 gd->bg_itable_unused = 0;
1026                 gd->bg_flags = 0;
1027                 ext2fs_group_desc_csum_set(fs, i);
1028         }
1029         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1030         ext2fs_mark_super_dirty(fs);
1031
1032         return 0;
1033 }
1034
1035 static void
1036 try_confirm_csum_seed_support(void)
1037 {
1038         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1039                 fputs(_("WARNING: Could not confirm kernel support for "
1040                         "metadata_csum_seed.\n  This requires Linux >= "
1041                         "v4.4.\n"), stderr);
1042 }
1043
1044 /*
1045  * Update the feature set as provided by the user.
1046  */
1047 static int update_feature_set(ext2_filsys fs, char *features)
1048 {
1049         struct ext2_super_block *sb = fs->super;
1050         __u32           old_features[3];
1051         int             type_err;
1052         unsigned int    mask_err;
1053         errcode_t       err;
1054         enum quota_type qtype;
1055
1056 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1057                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1058 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1059                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1060 #define FEATURE_CHANGED(type, mask) ((mask) & \
1061                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1062
1063         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1064         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1065         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1066
1067         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1068                               ok_features, clear_ok_features,
1069                               &type_err, &mask_err)) {
1070                 if (!mask_err)
1071                         fprintf(stderr,
1072                                 _("Invalid filesystem option set: %s\n"),
1073                                 features);
1074                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1075                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1076                                           "not supported.\n"),
1077                                 e2p_feature2string(type_err &
1078                                                    E2P_FEATURE_TYPE_MASK,
1079                                                    mask_err));
1080                 else
1081                         fprintf(stderr, _("Setting filesystem feature '%s' "
1082                                           "not supported.\n"),
1083                                 e2p_feature2string(type_err, mask_err));
1084                 return 1;
1085         }
1086
1087         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1088                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1089                     !(mount_flags & EXT2_MF_READONLY)) {
1090                         fputs(_("The has_journal feature may only be "
1091                                 "cleared when the filesystem is\n"
1092                                 "unmounted or mounted "
1093                                 "read-only.\n"), stderr);
1094                         return 1;
1095                 }
1096                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1097                     f_flag < 2) {
1098                         fputs(_("The needs_recovery flag is set.  "
1099                                 "Please run e2fsck before clearing\n"
1100                                 "the has_journal flag.\n"), stderr);
1101                         return 1;
1102                 }
1103                 if (sb->s_journal_inum) {
1104                         if (remove_journal_inode(fs))
1105                                 return 1;
1106                 }
1107                 if (sb->s_journal_dev) {
1108                         if (remove_journal_device(fs))
1109                                 return 1;
1110                 }
1111         }
1112
1113         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1114                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1115                 if (ext2fs_has_feature_meta_bg(sb)) {
1116                         fputs(_("Setting filesystem feature 'sparse_super' "
1117                                 "not supported\nfor filesystems with "
1118                                 "the meta_bg feature enabled.\n"),
1119                                 stderr);
1120                         return 1;
1121                 }
1122         }
1123
1124         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1125                 int error;
1126
1127                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1128                     (mount_flags & EXT2_MF_READONLY)) {
1129                         fputs(_("The multiple mount protection feature can't\n"
1130                                 "be set if the filesystem is mounted or\n"
1131                                 "read-only.\n"), stderr);
1132                         return 1;
1133                 }
1134
1135                 error = ext2fs_mmp_init(fs);
1136                 if (error) {
1137                         fputs(_("\nError while enabling multiple mount "
1138                                 "protection feature."), stderr);
1139                         return 1;
1140                 }
1141
1142                 /*
1143                  * We want to update group desc with the new free blocks count
1144                  */
1145                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1146
1147                 printf(_("Multiple mount protection has been enabled "
1148                          "with update interval %ds.\n"),
1149                        sb->s_mmp_update_interval);
1150         }
1151
1152         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1153                 int error;
1154
1155                 if (mount_flags & EXT2_MF_READONLY) {
1156                         fputs(_("The multiple mount protection feature cannot\n"
1157                                 "be disabled if the filesystem is readonly.\n"),
1158                                 stderr);
1159                         return 1;
1160                 }
1161
1162                 error = ext2fs_read_bitmaps(fs);
1163                 if (error) {
1164                         fputs(_("Error while reading bitmaps\n"), stderr);
1165                         return 1;
1166                 }
1167
1168                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1169                 if (error) {
1170                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1171
1172                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1173                                 printf(_("Magic number in MMP block does not "
1174                                          "match. expected: %x, actual: %x\n"),
1175                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1176                         else
1177                                 com_err(program_name, error, "%s",
1178                                         _("while reading MMP block."));
1179                         goto mmp_error;
1180                 }
1181
1182                 /* We need to force out the group descriptors as well */
1183                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1184                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1185 mmp_error:
1186                 sb->s_mmp_block = 0;
1187                 sb->s_mmp_update_interval = 0;
1188         }
1189
1190         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1191                 /*
1192                  * If adding a journal flag, let the create journal
1193                  * code below handle setting the flag and creating the
1194                  * journal.  We supply a default size if necessary.
1195                  */
1196                 if (!journal_size)
1197                         journal_size = -1;
1198                 ext2fs_clear_feature_journal(sb);
1199         }
1200
1201         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1202                 if (!sb->s_def_hash_version)
1203                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1204                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1205                         uuid_generate((unsigned char *) sb->s_hash_seed);
1206         }
1207
1208         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1209                 if (ext2fs_check_desc(fs)) {
1210                         fputs(_("Clearing the flex_bg flag would "
1211                                 "cause the the filesystem to be\n"
1212                                 "inconsistent.\n"), stderr);
1213                         return 1;
1214                 }
1215         }
1216
1217         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1218                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1219                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1220                     !(mount_flags & EXT2_MF_READONLY)) {
1221                         fputs(_("The huge_file feature may only be "
1222                                 "cleared when the filesystem is\n"
1223                                 "unmounted or mounted "
1224                                 "read-only.\n"), stderr);
1225                         return 1;
1226                 }
1227         }
1228
1229         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1230                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1231                 if (check_fsck_needed(fs,
1232                         _("Enabling checksums could take some time.")))
1233                         return 1;
1234                 if (mount_flags & EXT2_MF_MOUNTED) {
1235                         fputs(_("Cannot enable metadata_csum on a mounted "
1236                                 "filesystem!\n"), stderr);
1237                         return 1;
1238                 }
1239                 if (!ext2fs_has_feature_extents(fs->super))
1240                         printf("%s",
1241                                _("Extents are not enabled.  The file extent "
1242                                  "tree can be checksummed, whereas block maps "
1243                                  "cannot.  Not enabling extents reduces the "
1244                                  "coverage of metadata checksumming.  "
1245                                  "Re-run with -O extent to rectify.\n"));
1246                 if (!ext2fs_has_feature_64bit(fs->super))
1247                         printf("%s",
1248                                _("64-bit filesystem support is not enabled.  "
1249                                  "The larger fields afforded by this feature "
1250                                  "enable full-strength checksumming.  "
1251                                  "Run resize2fs -b to rectify.\n"));
1252                 rewrite_checksums = 1;
1253                 /* metadata_csum supersedes uninit_bg */
1254                 ext2fs_clear_feature_gdt_csum(fs->super);
1255
1256                 /* if uninit_bg was previously off, rewrite group desc */
1257                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1258                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1259                         enable_uninit_bg(fs);
1260
1261                 /*
1262                  * Since metadata_csum supersedes uninit_bg, pretend like
1263                  * uninit_bg has been off all along.
1264                  */
1265                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1266                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1267         }
1268
1269         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1270                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1271                 __u32   test_features[3];
1272
1273                 if (check_fsck_needed(fs,
1274                         _("Disabling checksums could take some time.")))
1275                         return 1;
1276                 if (mount_flags & EXT2_MF_MOUNTED) {
1277                         fputs(_("Cannot disable metadata_csum on a mounted "
1278                                 "filesystem!\n"), stderr);
1279                         return 1;
1280                 }
1281                 rewrite_checksums = 1;
1282
1283                 /* Enable uninit_bg unless the user expressly turned it off */
1284                 memcpy(test_features, old_features, sizeof(test_features));
1285                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1286                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1287                 e2p_edit_feature2(features, test_features, ok_features,
1288                                   clear_ok_features, NULL, NULL);
1289                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1290                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1291                         ext2fs_set_feature_gdt_csum(fs->super);
1292
1293                 /*
1294                  * If we're turning off metadata_csum and not turning on
1295                  * uninit_bg, rewrite group desc.
1296                  */
1297                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1298                         err = disable_uninit_bg(fs,
1299                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1300                         if (err)
1301                                 return 1;
1302                 } else
1303                         /*
1304                          * metadata_csum previously provided uninit_bg, so if
1305                          * we're also setting the uninit_bg feature bit,
1306                          * pretend like it was previously enabled.  Checksums
1307                          * will be rewritten with crc16 later.
1308                          */
1309                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1310                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1311                 fs->super->s_checksum_seed = 0;
1312                 ext2fs_clear_feature_csum_seed(fs->super);
1313         }
1314
1315         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1316                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1317                 if (mount_flags & EXT2_MF_MOUNTED) {
1318                         fputs(_("Cannot enable uninit_bg on a mounted "
1319                                 "filesystem!\n"), stderr);
1320                         return 1;
1321                 }
1322
1323                 /* Do not enable uninit_bg when metadata_csum enabled */
1324                 if (ext2fs_has_feature_metadata_csum(fs->super))
1325                         ext2fs_clear_feature_gdt_csum(fs->super);
1326                 else
1327                         enable_uninit_bg(fs);
1328         }
1329
1330         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1331                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1332                 if (mount_flags & EXT2_MF_MOUNTED) {
1333                         fputs(_("Cannot disable uninit_bg on a mounted "
1334                                 "filesystem!\n"), stderr);
1335                         return 1;
1336                 }
1337
1338                 err = disable_uninit_bg(fs,
1339                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1340                 if (err)
1341                         return 1;
1342         }
1343
1344         /*
1345          * We don't actually toggle 64bit; resize2fs does that.  But this
1346          * must come after the metadata_csum feature_on so that it won't
1347          * complain about the lack of 64bit.
1348          */
1349         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1350                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1351                 if (mount_flags & EXT2_MF_MOUNTED) {
1352                         fprintf(stderr, _("Cannot enable 64-bit mode "
1353                                           "while mounted!\n"));
1354                         return 1;
1355                 }
1356                 ext2fs_clear_feature_64bit(sb);
1357                 feature_64bit = 1;
1358         }
1359         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1360                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1361                 if (mount_flags & EXT2_MF_MOUNTED) {
1362                         fprintf(stderr, _("Cannot disable 64-bit mode "
1363                                           "while mounted!\n"));
1364                         return 1;
1365                 }
1366                 ext2fs_set_feature_64bit(sb);
1367                 feature_64bit = -1;
1368         }
1369
1370         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1371                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1372                 /*
1373                  * Set the Q_flag here and handle the quota options in the code
1374                  * below.
1375                  */
1376                 if (!Q_flag) {
1377                         Q_flag = 1;
1378                         /* Enable usr/grp quota by default */
1379                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1380                                 if (qtype != PRJQUOTA)
1381                                         quota_enable[qtype] = QOPT_ENABLE;
1382                                 else
1383                                         quota_enable[qtype] = QOPT_DISABLE;
1384                         }
1385                 }
1386                 ext2fs_clear_feature_quota(sb);
1387         }
1388
1389         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1390                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1391                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1392                         fprintf(stderr, _("Cannot enable project feature; "
1393                                           "inode size too small.\n"));
1394                         return 1;
1395                 }
1396                 Q_flag = 1;
1397                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1398         }
1399
1400         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1401                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1402                 Q_flag = 1;
1403                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1404         }
1405
1406         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1407                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1408                 /*
1409                  * Set the Q_flag here and handle the quota options in the code
1410                  * below.
1411                  */
1412                 if (Q_flag)
1413                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1414                                 "arguments.\n"), stderr);
1415                 Q_flag = 1;
1416                 /* Disable all quota by default */
1417                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1418                         quota_enable[qtype] = QOPT_DISABLE;
1419         }
1420
1421         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1422                 fs->super->s_encrypt_algos[0] =
1423                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1424                 fs->super->s_encrypt_algos[1] =
1425                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1426         }
1427
1428         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1429                 if (mount_flags & EXT2_MF_MOUNTED) {
1430                         fputs(_("The casefold feature may only be enabled when "
1431                                 "the filesystem is unmounted.\n"), stderr);
1432                         return 1;
1433                 }
1434                 fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
1435                 fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
1436                 enabling_casefold = 1;
1437         }
1438
1439         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1440                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1441                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1442                         fputs(_("Setting feature 'metadata_csum_seed' "
1443                                 "is only supported\non filesystems with "
1444                                 "the metadata_csum feature enabled.\n"),
1445                                 stderr);
1446                         return 1;
1447                 }
1448                 try_confirm_csum_seed_support();
1449                 fs->super->s_checksum_seed = fs->csum_seed;
1450         }
1451
1452         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1453                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1454                 __le32 uuid_seed;
1455
1456                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1457                                         sizeof(fs->super->s_uuid));
1458                 if (fs->super->s_checksum_seed != uuid_seed) {
1459                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1460                                 fputs(_("UUID has changed since enabling "
1461                 "metadata_csum.  Filesystem must be unmounted "
1462                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1463                                       stderr);
1464                                 return 1;
1465                         }
1466                         if (check_fsck_needed(fs, _("Recalculating checksums "
1467                                                      "could take some time.")))
1468                                 return 1;
1469                         rewrite_checksums = 1;
1470                 }
1471         }
1472
1473         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1474             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1475              sb->s_feature_incompat))
1476                 ext2fs_update_dynamic_rev(fs);
1477
1478         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1479                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1480             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1481                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1482             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1483                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1484             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1485                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1486             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1487                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1488                 request_fsck_afterwards(fs);
1489
1490         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1491             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1492             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1493                 ext2fs_mark_super_dirty(fs);
1494
1495         return 0;
1496 }
1497
1498 /*
1499  * Add a journal to the filesystem.
1500  */
1501 static int add_journal(ext2_filsys fs)
1502 {
1503         unsigned long journal_blocks;
1504         errcode_t       retval;
1505         ext2_filsys     jfs;
1506         io_manager      io_ptr;
1507
1508         if (ext2fs_has_feature_journal(fs->super)) {
1509                 fputs(_("The filesystem already has a journal.\n"), stderr);
1510                 goto err;
1511         }
1512         if (journal_device) {
1513                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1514                                         NULL))
1515                         proceed_question(-1);
1516                 check_mount(journal_device, 0, _("journal"));
1517 #ifdef CONFIG_TESTIO_DEBUG
1518                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1519                         io_ptr = test_io_manager;
1520                         test_io_backing_manager = unix_io_manager;
1521                 } else
1522 #endif
1523                         io_ptr = unix_io_manager;
1524                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1525                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1526                                      fs->blocksize, io_ptr, &jfs);
1527                 if (retval) {
1528                         com_err(program_name, retval,
1529                                 _("\n\twhile trying to open journal on %s\n"),
1530                                 journal_device);
1531                         goto err;
1532                 }
1533                 printf(_("Creating journal on device %s: "),
1534                        journal_device);
1535                 fflush(stdout);
1536
1537                 retval = ext2fs_add_journal_device(fs, jfs);
1538                 ext2fs_close_free(&jfs);
1539                 if (retval) {
1540                         com_err(program_name, retval,
1541                                 _("while adding filesystem to journal on %s"),
1542                                 journal_device);
1543                         goto err;
1544                 }
1545                 fputs(_("done\n"), stdout);
1546         } else if (journal_size) {
1547                 fputs(_("Creating journal inode: "), stdout);
1548                 fflush(stdout);
1549                 journal_blocks = figure_journal_size(journal_size, fs);
1550
1551                 if (journal_location_string)
1552                         journal_location =
1553                                 parse_num_blocks2(journal_location_string,
1554                                                   fs->super->s_log_block_size);
1555                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1556                                                    journal_location,
1557                                                    journal_flags);
1558                 if (retval) {
1559                         fprintf(stderr, "\n");
1560                         com_err(program_name, retval, "%s",
1561                                 _("\n\twhile trying to create journal file"));
1562                         return retval;
1563                 } else
1564                         fputs(_("done\n"), stdout);
1565                 /*
1566                  * If the filesystem wasn't mounted, we need to force
1567                  * the block group descriptors out.
1568                  */
1569                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1570                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1571         }
1572         print_check_message(fs->super->s_max_mnt_count,
1573                             fs->super->s_checkinterval);
1574         return 0;
1575
1576 err:
1577         free(journal_device);
1578         return 1;
1579 }
1580
1581 static int handle_quota_options(ext2_filsys fs)
1582 {
1583         errcode_t retval;
1584         quota_ctx_t qctx;
1585         ext2_ino_t qf_ino;
1586         enum quota_type qtype;
1587         unsigned int qtype_bits = 0;
1588         int need_dirty = 0;
1589
1590         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1591                 if (quota_enable[qtype] != 0)
1592                         break;
1593         if (qtype == MAXQUOTAS)
1594                 /* Nothing to do. */
1595                 return 0;
1596
1597         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1598             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1599                 fprintf(stderr, _("Cannot enable project quota; "
1600                                   "inode size too small.\n"));
1601                 return 1;
1602         }
1603
1604         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1605                 if (quota_enable[qtype] == QOPT_ENABLE)
1606                         qtype_bits |= 1 << qtype;
1607         }
1608
1609         retval = quota_init_context(&qctx, fs, qtype_bits);
1610         if (retval) {
1611                 com_err(program_name, retval,
1612                         _("while initializing quota context in support library"));
1613                 return 1;
1614         }
1615
1616         if (qtype_bits)
1617                 quota_compute_usage(qctx);
1618
1619         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1620                 if (quota_enable[qtype] == QOPT_ENABLE &&
1621                     *quota_sb_inump(fs->super, qtype) == 0) {
1622                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1623                                 retval = quota_update_limits(qctx, qf_ino,
1624                                                              qtype);
1625                                 if (retval) {
1626                                         com_err(program_name, retval,
1627                                                 _("while updating quota limits (%d)"),
1628                                                 qtype);
1629                                 quota_errout:
1630                                         quota_release_context(&qctx);
1631                                         return 1;
1632                                 }
1633                         }
1634                         retval = quota_write_inode(qctx, 1 << qtype);
1635                         if (retval) {
1636                                 com_err(program_name, retval,
1637                                         _("while writing quota file (%d)"),
1638                                         qtype);
1639                                 goto quota_errout;
1640                         }
1641                         /* Enable Quota feature if one of quota enabled */
1642                         if (!ext2fs_has_feature_quota(fs->super)) {
1643                                 ext2fs_set_feature_quota(fs->super);
1644                                 need_dirty = 1;
1645                         }
1646                         if (qtype == PRJQUOTA &&
1647                             !ext2fs_has_feature_project(fs->super)) {
1648                                 ext2fs_set_feature_project(fs->super);
1649                                 need_dirty = 1;
1650                         }
1651                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1652                         retval = quota_remove_inode(fs, qtype);
1653                         if (retval) {
1654                                 com_err(program_name, retval,
1655                                         _("while removing quota file (%d)"),
1656                                         qtype);
1657                                 goto quota_errout;
1658                         }
1659                         if (qtype == PRJQUOTA) {
1660                                 ext2fs_clear_feature_project(fs->super);
1661                                 need_dirty = 1;
1662                         }
1663                 }
1664         }
1665
1666         quota_release_context(&qctx);
1667         /* Clear Quota feature if all quota types disabled. */
1668         if (!qtype_bits) {
1669                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1670                         if (*quota_sb_inump(fs->super, qtype))
1671                                 break;
1672                 if (qtype == MAXQUOTAS) {
1673                         ext2fs_clear_feature_quota(fs->super);
1674                         need_dirty = 1;
1675                 }
1676
1677         }
1678         if (need_dirty)
1679                 ext2fs_mark_super_dirty(fs);
1680         return 0;
1681 }
1682
1683 static int option_handle_function(char *token)
1684 {
1685         if (strncmp(token, "usr", 3) == 0) {
1686                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1687         } else if (strncmp(token, "^usr", 4) == 0) {
1688                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1689         } else if (strncmp(token, "grp", 3) == 0) {
1690                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1691         } else if (strncmp(token, "^grp", 4) == 0) {
1692                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1693         } else if (strncmp(token, "prj", 3) == 0) {
1694                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1695         } else if (strncmp(token, "^prj", 4) == 0) {
1696                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1697         } else {
1698                 fputs(_("\nBad quota options specified.\n\n"
1699                         "Following valid quota options are available "
1700                         "(pass by separating with comma):\n"
1701                         "\t[^]usr[quota]\n"
1702                         "\t[^]grp[quota]\n"
1703                         "\t[^]prj[quota]\n"
1704                         "\n\n"), stderr);
1705                 return 1;
1706         }
1707         return 0;
1708 }
1709
1710 static void parse_e2label_options(int argc, char ** argv)
1711 {
1712         if ((argc < 2) || (argc > 3)) {
1713                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1714                 exit(1);
1715         }
1716         io_options = strchr(argv[1], '?');
1717         if (io_options)
1718                 *io_options++ = 0;
1719         device_name = blkid_get_devname(NULL, argv[1], NULL);
1720         if (!device_name) {
1721                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1722                         argv[1]);
1723                 exit(1);
1724         }
1725         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1726         if (argc == 3) {
1727                 open_flag |= EXT2_FLAG_RW;
1728                 L_flag = 1;
1729                 new_label = argv[2];
1730         } else
1731                 print_label++;
1732 }
1733
1734 static time_t parse_time(char *str)
1735 {
1736         struct  tm      ts;
1737
1738         if (strcmp(str, "now") == 0) {
1739                 return (time(0));
1740         }
1741         memset(&ts, 0, sizeof(ts));
1742 #ifdef HAVE_STRPTIME
1743         strptime(str, "%Y%m%d%H%M%S", &ts);
1744 #else
1745         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1746                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1747         ts.tm_year -= 1900;
1748         ts.tm_mon -= 1;
1749         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1750             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1751             ts.tm_min > 59 || ts.tm_sec > 61)
1752                 ts.tm_mday = 0;
1753 #endif
1754         if (ts.tm_mday == 0) {
1755                 com_err(program_name, 0,
1756                         _("Couldn't parse date/time specifier: %s"),
1757                         str);
1758                 usage();
1759         }
1760         ts.tm_isdst = -1;
1761         return (mktime(&ts));
1762 }
1763
1764 static void parse_tune2fs_options(int argc, char **argv)
1765 {
1766         int c;
1767         char *tmp;
1768         struct group *gr;
1769         struct passwd *pw;
1770         int ret;
1771         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1772
1773         open_flag = 0;
1774         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1775         while ((c = getopt(argc, argv, optstring)) != EOF)
1776                 switch (c) {
1777                 case 'c':
1778                         max_mount_count = strtol(optarg, &tmp, 0);
1779                         if (*tmp || max_mount_count > 16000) {
1780                                 com_err(program_name, 0,
1781                                         _("bad mounts count - %s"),
1782                                         optarg);
1783                                 usage();
1784                         }
1785                         if (max_mount_count == 0)
1786                                 max_mount_count = -1;
1787                         c_flag = 1;
1788                         open_flag = EXT2_FLAG_RW;
1789                         break;
1790                 case 'C':
1791                         mount_count = strtoul(optarg, &tmp, 0);
1792                         if (*tmp || mount_count > 16000) {
1793                                 com_err(program_name, 0,
1794                                         _("bad mounts count - %s"),
1795                                         optarg);
1796                                 usage();
1797                         }
1798                         C_flag = 1;
1799                         open_flag = EXT2_FLAG_RW;
1800                         break;
1801                 case 'e':
1802                         if (strcmp(optarg, "continue") == 0)
1803                                 errors = EXT2_ERRORS_CONTINUE;
1804                         else if (strcmp(optarg, "remount-ro") == 0)
1805                                 errors = EXT2_ERRORS_RO;
1806                         else if (strcmp(optarg, "panic") == 0)
1807                                 errors = EXT2_ERRORS_PANIC;
1808                         else {
1809                                 com_err(program_name, 0,
1810                                         _("bad error behavior - %s"),
1811                                         optarg);
1812                                 usage();
1813                         }
1814                         e_flag = 1;
1815                         open_flag = EXT2_FLAG_RW;
1816                         break;
1817                 case 'E':
1818                         extended_cmd = optarg;
1819                         open_flag |= EXT2_FLAG_RW;
1820                         break;
1821                 case 'f': /* Force */
1822                         f_flag++;
1823                         break;
1824                 case 'g':
1825                         resgid = strtoul(optarg, &tmp, 0);
1826                         if (*tmp) {
1827                                 gr = getgrnam(optarg);
1828                                 if (gr == NULL)
1829                                         tmp = optarg;
1830                                 else {
1831                                         resgid = gr->gr_gid;
1832                                         *tmp = 0;
1833                                 }
1834                         }
1835                         if (*tmp) {
1836                                 com_err(program_name, 0,
1837                                         _("bad gid/group name - %s"),
1838                                         optarg);
1839                                 usage();
1840                         }
1841                         g_flag = 1;
1842                         open_flag = EXT2_FLAG_RW;
1843                         break;
1844                 case 'i':
1845                         interval = strtoul(optarg, &tmp, 0);
1846                         switch (*tmp) {
1847                         case 's':
1848                                 tmp++;
1849                                 break;
1850                         case '\0':
1851                         case 'd':
1852                         case 'D': /* days */
1853                                 interval *= 86400;
1854                                 if (*tmp != '\0')
1855                                         tmp++;
1856                                 break;
1857                         case 'm':
1858                         case 'M': /* months! */
1859                                 interval *= 86400 * 30;
1860                                 tmp++;
1861                                 break;
1862                         case 'w':
1863                         case 'W': /* weeks */
1864                                 interval *= 86400 * 7;
1865                                 tmp++;
1866                                 break;
1867                         }
1868                         if (*tmp) {
1869                                 com_err(program_name, 0,
1870                                         _("bad interval - %s"), optarg);
1871                                 usage();
1872                         }
1873                         i_flag = 1;
1874                         open_flag = EXT2_FLAG_RW;
1875                         break;
1876                 case 'j':
1877                         if (!journal_size)
1878                                 journal_size = -1;
1879                         open_flag = EXT2_FLAG_RW;
1880                         break;
1881                 case 'J':
1882                         parse_journal_opts(optarg);
1883                         open_flag = EXT2_FLAG_RW;
1884                         break;
1885                 case 'l':
1886                         l_flag = 1;
1887                         break;
1888                 case 'L':
1889                         new_label = optarg;
1890                         L_flag = 1;
1891                         open_flag |= EXT2_FLAG_RW |
1892                                 EXT2_FLAG_JOURNAL_DEV_OK;
1893                         break;
1894                 case 'm':
1895                         reserved_ratio = strtod(optarg, &tmp);
1896                         if (*tmp || reserved_ratio > 50 ||
1897                             reserved_ratio < 0) {
1898                                 com_err(program_name, 0,
1899                                         _("bad reserved block ratio - %s"),
1900                                         optarg);
1901                                 usage();
1902                         }
1903                         m_flag = 1;
1904                         open_flag = EXT2_FLAG_RW;
1905                         break;
1906                 case 'M':
1907                         new_last_mounted = optarg;
1908                         M_flag = 1;
1909                         open_flag = EXT2_FLAG_RW;
1910                         break;
1911                 case 'o':
1912                         if (mntopts_cmd) {
1913                                 com_err(program_name, 0, "%s",
1914                                         _("-o may only be specified once"));
1915                                 usage();
1916                         }
1917                         mntopts_cmd = optarg;
1918                         open_flag = EXT2_FLAG_RW;
1919                         break;
1920                 case 'O':
1921                         if (features_cmd) {
1922                                 com_err(program_name, 0, "%s",
1923                                         _("-O may only be specified once"));
1924                                 usage();
1925                         }
1926                         features_cmd = optarg;
1927                         open_flag = EXT2_FLAG_RW;
1928                         break;
1929                 case 'Q':
1930                         Q_flag = 1;
1931                         ret = parse_quota_opts(optarg, option_handle_function);
1932                         if (ret)
1933                                 exit(1);
1934                         open_flag = EXT2_FLAG_RW;
1935                         break;
1936                 case 'r':
1937                         reserved_blocks = strtoul(optarg, &tmp, 0);
1938                         if (*tmp) {
1939                                 com_err(program_name, 0,
1940                                         _("bad reserved blocks count - %s"),
1941                                         optarg);
1942                                 usage();
1943                         }
1944                         r_flag = 1;
1945                         open_flag = EXT2_FLAG_RW;
1946                         break;
1947                 case 's': /* Deprecated */
1948                         s_flag = atoi(optarg);
1949                         open_flag = EXT2_FLAG_RW;
1950                         break;
1951                 case 'T':
1952                         T_flag = 1;
1953                         last_check_time = parse_time(optarg);
1954                         open_flag = EXT2_FLAG_RW;
1955                         break;
1956                 case 'u':
1957                                 resuid = strtoul(optarg, &tmp, 0);
1958                                 if (*tmp) {
1959                                         pw = getpwnam(optarg);
1960                                         if (pw == NULL)
1961                                                 tmp = optarg;
1962                                         else {
1963                                                 resuid = pw->pw_uid;
1964                                                 *tmp = 0;
1965                                         }
1966                                 }
1967                                 if (*tmp) {
1968                                         com_err(program_name, 0,
1969                                                 _("bad uid/user name - %s"),
1970                                                 optarg);
1971                                         usage();
1972                                 }
1973                                 u_flag = 1;
1974                                 open_flag = EXT2_FLAG_RW;
1975                                 break;
1976                 case 'U':
1977                         new_UUID = optarg;
1978                         U_flag = 1;
1979                         open_flag = EXT2_FLAG_RW |
1980                                 EXT2_FLAG_JOURNAL_DEV_OK;
1981                         break;
1982                 case 'I':
1983                         new_inode_size = strtoul(optarg, &tmp, 0);
1984                         if (*tmp) {
1985                                 com_err(program_name, 0,
1986                                         _("bad inode size - %s"),
1987                                         optarg);
1988                                 usage();
1989                         }
1990                         if (!((new_inode_size &
1991                                (new_inode_size - 1)) == 0)) {
1992                                 com_err(program_name, 0,
1993                                         _("Inode size must be a "
1994                                           "power of two- %s"),
1995                                         optarg);
1996                                 usage();
1997                         }
1998                         open_flag = EXT2_FLAG_RW;
1999                         I_flag = 1;
2000                         break;
2001                 case 'z':
2002                         undo_file = optarg;
2003                         break;
2004                 default:
2005                         usage();
2006                 }
2007         if (optind < argc - 1 || optind == argc)
2008                 usage();
2009         if (!open_flag && !l_flag)
2010                 usage();
2011         io_options = strchr(argv[optind], '?');
2012         if (io_options)
2013                 *io_options++ = 0;
2014         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2015         if (!device_name) {
2016                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2017                         argv[optind]);
2018                 exit(1);
2019         }
2020 }
2021
2022 #ifdef CONFIG_BUILD_FINDFS
2023 void do_findfs(int argc, char **argv)
2024 {
2025         char    *dev;
2026
2027         if ((argc != 2) ||
2028             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2029                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2030                 exit(2);
2031         }
2032         dev = blkid_get_devname(NULL, argv[1], NULL);
2033         if (!dev) {
2034                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2035                         argv[1]);
2036                 exit(1);
2037         }
2038         puts(dev);
2039         exit(0);
2040 }
2041 #endif
2042
2043 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2044 {
2045         struct ext2_super_block *sb = fs->super;
2046         char    *buf, *token, *next, *p, *arg;
2047         int     len, hash_alg;
2048         int     r_usage = 0;
2049         int encoding = 0;
2050         char    *encoding_flags = NULL;
2051
2052         len = strlen(opts);
2053         buf = malloc(len+1);
2054         if (!buf) {
2055                 fprintf(stderr, "%s",
2056                         _("Couldn't allocate memory to parse options!\n"));
2057                 return 1;
2058         }
2059         strcpy(buf, opts);
2060         for (token = buf; token && *token; token = next) {
2061                 p = strchr(token, ',');
2062                 next = 0;
2063                 if (p) {
2064                         *p = 0;
2065                         next = p+1;
2066                 }
2067                 arg = strchr(token, '=');
2068                 if (arg) {
2069                         *arg = 0;
2070                         arg++;
2071                 }
2072                 if (strcmp(token, "clear-mmp") == 0 ||
2073                     strcmp(token, "clear_mmp") == 0) {
2074                         clear_mmp = 1;
2075                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2076                         unsigned long intv;
2077                         if (!arg) {
2078                                 r_usage++;
2079                                 continue;
2080                         }
2081                         intv = strtoul(arg, &p, 0);
2082                         if (*p) {
2083                                 fprintf(stderr,
2084                                         _("Invalid mmp_update_interval: %s\n"),
2085                                         arg);
2086                                 r_usage++;
2087                                 continue;
2088                         }
2089                         if (intv == 0) {
2090                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2091                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2092                                 fprintf(stderr,
2093                                         _("mmp_update_interval too big: %lu\n"),
2094                                         intv);
2095                                 r_usage++;
2096                                 continue;
2097                         }
2098                         printf(P_("Setting multiple mount protection update "
2099                                   "interval to %lu second\n",
2100                                   "Setting multiple mount protection update "
2101                                   "interval to %lu seconds\n", intv),
2102                                intv);
2103                         sb->s_mmp_update_interval = intv;
2104                         ext2fs_mark_super_dirty(fs);
2105                 } else if (!strcmp(token, "force_fsck")) {
2106                         sb->s_state |= EXT2_ERROR_FS;
2107                         printf(_("Setting filesystem error flag to force fsck.\n"));
2108                         ext2fs_mark_super_dirty(fs);
2109                 } else if (!strcmp(token, "test_fs")) {
2110                         sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2111                         printf("Setting test filesystem flag\n");
2112                         ext2fs_mark_super_dirty(fs);
2113                 } else if (!strcmp(token, "^test_fs")) {
2114                         sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2115                         printf("Clearing test filesystem flag\n");
2116                         ext2fs_mark_super_dirty(fs);
2117                 } else if (strcmp(token, "stride") == 0) {
2118                         if (!arg) {
2119                                 r_usage++;
2120                                 continue;
2121                         }
2122                         stride = strtoul(arg, &p, 0);
2123                         if (*p) {
2124                                 fprintf(stderr,
2125                                         _("Invalid RAID stride: %s\n"),
2126                                         arg);
2127                                 r_usage++;
2128                                 continue;
2129                         }
2130                         stride_set = 1;
2131                 } else if (strcmp(token, "stripe-width") == 0 ||
2132                            strcmp(token, "stripe_width") == 0) {
2133                         if (!arg) {
2134                                 r_usage++;
2135                                 continue;
2136                         }
2137                         stripe_width = strtoul(arg, &p, 0);
2138                         if (*p) {
2139                                 fprintf(stderr,
2140                                         _("Invalid RAID stripe-width: %s\n"),
2141                                         arg);
2142                                 r_usage++;
2143                                 continue;
2144                         }
2145                         stripe_width_set = 1;
2146                 } else if (strcmp(token, "hash_alg") == 0 ||
2147                            strcmp(token, "hash-alg") == 0) {
2148                         if (!arg) {
2149                                 r_usage++;
2150                                 continue;
2151                         }
2152                         hash_alg = e2p_string2hash(arg);
2153                         if (hash_alg < 0) {
2154                                 fprintf(stderr,
2155                                         _("Invalid hash algorithm: %s\n"),
2156                                         arg);
2157                                 r_usage++;
2158                                 continue;
2159                         }
2160                         sb->s_def_hash_version = hash_alg;
2161                         printf(_("Setting default hash algorithm "
2162                                  "to %s (%d)\n"),
2163                                arg, hash_alg);
2164                         ext2fs_mark_super_dirty(fs);
2165                 } else if (!strcmp(token, "mount_opts")) {
2166                         if (!arg) {
2167                                 r_usage++;
2168                                 continue;
2169                         }
2170                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2171                                 fprintf(stderr,
2172                                         "Extended mount options too long\n");
2173                                 continue;
2174                         }
2175                         ext_mount_opts = strdup(arg);
2176                 } else if (!strcmp(token, "encoding")) {
2177                         if (!arg) {
2178                                 r_usage++;
2179                                 continue;
2180                         }
2181                         if (mount_flags & EXT2_MF_MOUNTED) {
2182                                 fputs(_("The casefold feature may only be enabled when "
2183                                         "the filesystem is unmounted.\n"), stderr);
2184                                 r_usage++;
2185                                 continue;
2186                         }
2187                         if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
2188                                 fprintf(stderr, _("Cannot alter existing encoding\n"));
2189                                 r_usage++;
2190                                 continue;
2191                         }
2192                         encoding = e2p_str2encoding(arg);
2193                         if (encoding < 0) {
2194                                 fprintf(stderr, _("Invalid encoding: %s\n"), arg);
2195                                 r_usage++;
2196                                 continue;
2197                         }
2198                         enabling_casefold = 1;
2199                         sb->s_encoding = encoding;
2200                         printf(_("Setting encoding to '%s'\n"), arg);
2201                         sb->s_encoding_flags =
2202                                 e2p_get_encoding_flags(sb->s_encoding);
2203                 } else if (!strcmp(token, "encoding_flags")) {
2204                         if (!arg) {
2205                                 r_usage++;
2206                                 continue;
2207                         }
2208                         encoding_flags = arg;
2209                 } else
2210                         r_usage++;
2211         }
2212
2213         if (encoding > 0 && !r_usage) {
2214                 sb->s_encoding_flags =
2215                         e2p_get_encoding_flags(sb->s_encoding);
2216
2217                 if (encoding_flags &&
2218                     e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
2219                                            &sb->s_encoding_flags)) {
2220                         fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
2221                                         encoding_flags);
2222                         r_usage++;
2223                 } else if (encoding_flags)
2224                         printf(_("Setting encoding_flags to '%s'\n"),
2225                                  encoding_flags);
2226                 ext2fs_set_feature_casefold(sb);
2227                 ext2fs_mark_super_dirty(fs);
2228         } else if (encoding_flags && !r_usage) {
2229                 fprintf(stderr, _("error: An encoding must be explicitly "
2230                                   "specified when passing encoding-flags\n"));
2231                 r_usage++;
2232         }
2233         if (r_usage) {
2234                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2235                         "Extended options are separated by commas, "
2236                         "and may take an argument which\n"
2237                         "\tis set off by an equals ('=') sign.\n\n"
2238                         "Valid extended options are:\n"
2239                         "\tclear_mmp\n"
2240                         "\thash_alg=<hash algorithm>\n"
2241                         "\tmount_opts=<extended default mount options>\n"
2242                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2243                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2244                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2245                         "\tforce_fsck\n"
2246                         "\ttest_fs\n"
2247                         "\t^test_fs\n"
2248                         "\tencoding=<encoding>\n"
2249                         "\tencoding_flags=<flags>\n"));
2250                 free(buf);
2251                 return 1;
2252         }
2253         free(buf);
2254
2255         return 0;
2256 }
2257
2258 /*
2259  * Fill in the block bitmap bmap with the information regarding the
2260  * blocks to be moved
2261  */
2262 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2263                             ext2fs_block_bitmap bmap)
2264 {
2265         dgrp_t i;
2266         int retval;
2267         ext2_badblocks_list bb_list = 0;
2268         blk64_t j, needed_blocks = 0;
2269         blk64_t start_blk, end_blk;
2270
2271         retval = ext2fs_read_bb_inode(fs, &bb_list);
2272         if (retval)
2273                 return retval;
2274
2275         for (i = 0; i < fs->group_desc_count; i++) {
2276                 start_blk = ext2fs_inode_table_loc(fs, i) +
2277                                         fs->inode_blocks_per_group;
2278
2279                 end_blk = ext2fs_inode_table_loc(fs, i) +
2280                                         new_ino_blks_per_grp;
2281
2282                 for (j = start_blk; j < end_blk; j++) {
2283                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2284                                 /*
2285                                  * IF the block is a bad block we fail
2286                                  */
2287                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2288                                         ext2fs_badblocks_list_free(bb_list);
2289                                         return ENOSPC;
2290                                 }
2291
2292                                 ext2fs_mark_block_bitmap2(bmap, j);
2293                         } else {
2294                                 /*
2295                                  * We are going to use this block for
2296                                  * inode table. So mark them used.
2297                                  */
2298                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2299                         }
2300                 }
2301                 needed_blocks += end_blk - start_blk;
2302         }
2303
2304         ext2fs_badblocks_list_free(bb_list);
2305         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2306                 return ENOSPC;
2307
2308         return 0;
2309 }
2310
2311 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2312 {
2313         dgrp_t group;
2314         group = ext2fs_group_of_blk2(fs, blk);
2315         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2316                 return 1;
2317         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2318                 return 1;
2319         return 0;
2320 }
2321
2322 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2323 {
2324         blk64_t start_blk, end_blk;
2325         start_blk = fs->super->s_first_data_block +
2326                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2327         /*
2328          * We cannot get new block beyond end_blk for for the last block group
2329          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2330          */
2331         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2332         if (blk >= start_blk && blk <= end_blk)
2333                 return 1;
2334         return 0;
2335 }
2336
2337 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2338 {
2339
2340         char *buf;
2341         dgrp_t group = 0;
2342         errcode_t retval;
2343         int meta_data = 0;
2344         blk64_t blk, new_blk, goal;
2345         struct blk_move *bmv;
2346
2347         retval = ext2fs_get_mem(fs->blocksize, &buf);
2348         if (retval)
2349                 return retval;
2350
2351         for (new_blk = blk = fs->super->s_first_data_block;
2352              blk < ext2fs_blocks_count(fs->super); blk++) {
2353                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2354                         continue;
2355
2356                 if (ext2fs_is_meta_block(fs, blk)) {
2357                         /*
2358                          * If the block is mapping a fs meta data block
2359                          * like group desc/block bitmap/inode bitmap. We
2360                          * should find a block in the same group and fix
2361                          * the respective fs metadata pointers. Otherwise
2362                          * fail
2363                          */
2364                         group = ext2fs_group_of_blk2(fs, blk);
2365                         goal = ext2fs_group_first_block2(fs, group);
2366                         meta_data = 1;
2367
2368                 } else {
2369                         goal = new_blk;
2370                 }
2371                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2372                 if (retval)
2373                         goto err_out;
2374
2375                 /* new fs meta data block should be in the same group */
2376                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2377                         retval = ENOSPC;
2378                         goto err_out;
2379                 }
2380
2381                 /* Mark this block as allocated */
2382                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2383
2384                 /* Add it to block move list */
2385                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2386                 if (retval)
2387                         goto err_out;
2388
2389                 bmv->old_loc = blk;
2390                 bmv->new_loc = new_blk;
2391
2392                 list_add(&(bmv->list), &blk_move_list);
2393
2394                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2395                 if (retval)
2396                         goto err_out;
2397
2398                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2399                 if (retval)
2400                         goto err_out;
2401         }
2402
2403 err_out:
2404         ext2fs_free_mem(&buf);
2405         return retval;
2406 }
2407
2408 static blk64_t translate_block(blk64_t blk)
2409 {
2410         struct list_head *entry;
2411         struct blk_move *bmv;
2412
2413         list_for_each(entry, &blk_move_list) {
2414                 bmv = list_entry(entry, struct blk_move, list);
2415                 if (bmv->old_loc == blk)
2416                         return bmv->new_loc;
2417         }
2418
2419         return 0;
2420 }
2421
2422 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2423                          blk64_t *block_nr,
2424                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2425                          blk64_t ref_block EXT2FS_ATTR((unused)),
2426                          int ref_offset EXT2FS_ATTR((unused)),
2427                          void *priv_data)
2428 {
2429         int ret = 0;
2430         blk64_t new_blk;
2431         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2432
2433         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2434                 return 0;
2435         new_blk = translate_block(*block_nr);
2436         if (new_blk) {
2437                 *block_nr = new_blk;
2438                 /*
2439                  * This will force the ext2fs_write_inode in the iterator
2440                  */
2441                 ret |= BLOCK_CHANGED;
2442         }
2443
2444         return ret;
2445 }
2446
2447 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2448 {
2449         errcode_t retval = 0;
2450         ext2_ino_t ino;
2451         blk64_t blk;
2452         char *block_buf = 0;
2453         struct ext2_inode inode;
2454         ext2_inode_scan scan = NULL;
2455
2456         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2457         if (retval)
2458                 return retval;
2459
2460         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2461         if (retval)
2462                 goto err_out;
2463
2464         while (1) {
2465                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2466                 if (retval)
2467                         goto err_out;
2468
2469                 if (!ino)
2470                         break;
2471
2472                 if (inode.i_links_count == 0)
2473                         continue; /* inode not in use */
2474
2475                 /* FIXME!!
2476                  * If we end up modifying the journal inode
2477                  * the sb->s_jnl_blocks will differ. But a
2478                  * subsequent e2fsck fixes that.
2479                  * Do we need to fix this ??
2480                  */
2481
2482                 if (ext2fs_file_acl_block(fs, &inode) &&
2483                     ext2fs_test_block_bitmap2(bmap,
2484                                         ext2fs_file_acl_block(fs, &inode))) {
2485                         blk = translate_block(ext2fs_file_acl_block(fs,
2486                                                                     &inode));
2487                         if (!blk)
2488                                 continue;
2489
2490                         ext2fs_file_acl_block_set(fs, &inode, blk);
2491
2492                         /*
2493                          * Write the inode to disk so that inode table
2494                          * resizing can work
2495                          */
2496                         retval = ext2fs_write_inode(fs, ino, &inode);
2497                         if (retval)
2498                                 goto err_out;
2499                 }
2500
2501                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2502                         continue;
2503
2504                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2505                                                process_block, bmap);
2506                 if (retval)
2507                         goto err_out;
2508
2509         }
2510
2511 err_out:
2512         ext2fs_free_mem(&block_buf);
2513         ext2fs_close_inode_scan(scan);
2514
2515         return retval;
2516 }
2517
2518 /*
2519  * We need to scan for inode and block bitmaps that may need to be
2520  * moved.  This can take place if the filesystem was formatted for
2521  * RAID arrays using the mke2fs's extended option "stride".
2522  */
2523 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2524 {
2525         dgrp_t i;
2526         blk64_t blk, new_blk;
2527
2528         for (i = 0; i < fs->group_desc_count; i++) {
2529                 blk = ext2fs_block_bitmap_loc(fs, i);
2530                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2531                         new_blk = translate_block(blk);
2532                         if (!new_blk)
2533                                 continue;
2534                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2535                 }
2536
2537                 blk = ext2fs_inode_bitmap_loc(fs, i);
2538                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2539                         new_blk = translate_block(blk);
2540                         if (!new_blk)
2541                                 continue;
2542                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2543                 }
2544         }
2545         return 0;
2546 }
2547
2548 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2549 {
2550         dgrp_t i;
2551         blk64_t blk;
2552         errcode_t retval;
2553         int new_ino_blks_per_grp;
2554         unsigned int j;
2555         char *old_itable = NULL, *new_itable = NULL;
2556         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2557         unsigned long old_ino_size;
2558         int old_itable_size, new_itable_size;
2559
2560         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2561         old_ino_size = EXT2_INODE_SIZE(fs->super);
2562
2563         new_ino_blks_per_grp = ext2fs_div_ceil(
2564                                         EXT2_INODES_PER_GROUP(fs->super) *
2565                                         new_ino_size,
2566                                         fs->blocksize);
2567
2568         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2569
2570         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2571         if (retval)
2572                 return retval;
2573
2574         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2575         if (retval)
2576                 goto err_out;
2577
2578         tmp_old_itable = old_itable;
2579         tmp_new_itable = new_itable;
2580
2581         for (i = 0; i < fs->group_desc_count; i++) {
2582                 blk = ext2fs_inode_table_loc(fs, i);
2583                 retval = io_channel_read_blk64(fs->io, blk,
2584                                 fs->inode_blocks_per_group, old_itable);
2585                 if (retval)
2586                         goto err_out;
2587
2588                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2589                         memcpy(new_itable, old_itable, old_ino_size);
2590
2591                         memset(new_itable+old_ino_size, 0,
2592                                         new_ino_size - old_ino_size);
2593
2594                         new_itable += new_ino_size;
2595                         old_itable += old_ino_size;
2596                 }
2597
2598                 /* reset the pointer */
2599                 old_itable = tmp_old_itable;
2600                 new_itable = tmp_new_itable;
2601
2602                 retval = io_channel_write_blk64(fs->io, blk,
2603                                         new_ino_blks_per_grp, new_itable);
2604                 if (retval)
2605                         goto err_out;
2606         }
2607
2608         /* Update the meta data */
2609         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2610         ext2fs_free_inode_cache(fs->icache);
2611         fs->icache = 0;
2612         fs->super->s_inode_size = new_ino_size;
2613
2614 err_out:
2615         if (old_itable)
2616                 ext2fs_free_mem(&old_itable);
2617
2618         if (new_itable)
2619                 ext2fs_free_mem(&new_itable);
2620
2621         return retval;
2622 }
2623
2624 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2625 {
2626         blk64_t         blk;
2627         ext2_ino_t      ino;
2628         unsigned int    group = 0;
2629         unsigned int    count = 0;
2630         int             total_free = 0;
2631         int             group_free = 0;
2632
2633         /*
2634          * First calculate the block statistics
2635          */
2636         for (blk = fs->super->s_first_data_block;
2637              blk < ext2fs_blocks_count(fs->super); blk++) {
2638                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2639                         group_free++;
2640                         total_free++;
2641                 }
2642                 count++;
2643                 if ((count == fs->super->s_blocks_per_group) ||
2644                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2645                         ext2fs_bg_free_blocks_count_set(fs, group++,
2646                                                         group_free);
2647                         count = 0;
2648                         group_free = 0;
2649                 }
2650         }
2651         total_free = EXT2FS_C2B(fs, total_free);
2652         ext2fs_free_blocks_count_set(fs->super, total_free);
2653
2654         /*
2655          * Next, calculate the inode statistics
2656          */
2657         group_free = 0;
2658         total_free = 0;
2659         count = 0;
2660         group = 0;
2661
2662         /* Protect loop from wrap-around if s_inodes_count maxed */
2663         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2664                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2665                         group_free++;
2666                         total_free++;
2667                 }
2668                 count++;
2669                 if ((count == fs->super->s_inodes_per_group) ||
2670                     (ino == fs->super->s_inodes_count)) {
2671                         ext2fs_bg_free_inodes_count_set(fs, group++,
2672                                                         group_free);
2673                         count = 0;
2674                         group_free = 0;
2675                 }
2676         }
2677         fs->super->s_free_inodes_count = total_free;
2678         ext2fs_mark_super_dirty(fs);
2679         return 0;
2680 }
2681
2682 #define list_for_each_safe(pos, pnext, head) \
2683         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2684              pos = pnext, pnext = pos->next)
2685
2686 static void free_blk_move_list(void)
2687 {
2688         struct list_head *entry, *tmp;
2689         struct blk_move *bmv;
2690
2691         list_for_each_safe(entry, tmp, &blk_move_list) {
2692                 bmv = list_entry(entry, struct blk_move, list);
2693                 list_del(entry);
2694                 ext2fs_free_mem(&bmv);
2695         }
2696         return;
2697 }
2698
2699 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2700 {
2701         errcode_t retval;
2702         int new_ino_blks_per_grp;
2703         ext2fs_block_bitmap bmap;
2704
2705         retval = ext2fs_read_inode_bitmap(fs);
2706         if (retval) {
2707                 fputs(_("Failed to read inode bitmap\n"), stderr);
2708                 return retval;
2709         }
2710         retval = ext2fs_read_block_bitmap(fs);
2711         if (retval) {
2712                 fputs(_("Failed to read block bitmap\n"), stderr);
2713                 return retval;
2714         }
2715         INIT_LIST_HEAD(&blk_move_list);
2716
2717
2718         new_ino_blks_per_grp = ext2fs_div_ceil(
2719                                         EXT2_INODES_PER_GROUP(fs->super)*
2720                                         new_size,
2721                                         fs->blocksize);
2722
2723         /* We may change the file system.
2724          * Mark the file system as invalid so that
2725          * the user is prompted to run fsck.
2726          */
2727         fs->super->s_state &= ~EXT2_VALID_FS;
2728
2729         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2730                                                 &bmap);
2731         if (retval) {
2732                 fputs(_("Failed to allocate block bitmap when "
2733                                 "increasing inode size\n"), stderr);
2734                 return retval;
2735         }
2736         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2737         if (retval) {
2738                 fputs(_("Not enough space to increase inode size \n"), stderr);
2739                 goto err_out;
2740         }
2741         retval = move_block(fs, bmap);
2742         if (retval) {
2743                 fputs(_("Failed to relocate blocks during inode resize \n"),
2744                       stderr);
2745                 goto err_out;
2746         }
2747         retval = inode_scan_and_fix(fs, bmap);
2748         if (retval)
2749                 goto err_out_undo;
2750
2751         retval = group_desc_scan_and_fix(fs, bmap);
2752         if (retval)
2753                 goto err_out_undo;
2754
2755         retval = expand_inode_table(fs, new_size);
2756         if (retval)
2757                 goto err_out_undo;
2758
2759         ext2fs_calculate_summary_stats(fs);
2760
2761         fs->super->s_state |= EXT2_VALID_FS;
2762         /* mark super block and block bitmap as dirty */
2763         ext2fs_mark_super_dirty(fs);
2764         ext2fs_mark_bb_dirty(fs);
2765
2766 err_out:
2767         free_blk_move_list();
2768         ext2fs_free_block_bitmap(bmap);
2769
2770         return retval;
2771
2772 err_out_undo:
2773         free_blk_move_list();
2774         ext2fs_free_block_bitmap(bmap);
2775         fputs(_("Error in resizing the inode size.\n"
2776                         "Run e2undo to undo the "
2777                         "file system changes. \n"), stderr);
2778
2779         return retval;
2780 }
2781
2782 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2783 {
2784         errcode_t retval = 0;
2785         const char *tdb_dir;
2786         char *tdb_file = NULL;
2787         char *dev_name, *tmp_name;
2788
2789         /* (re)open a specific undo file */
2790         if (undo_file && undo_file[0] != 0) {
2791                 retval = set_undo_io_backing_manager(*io_ptr);
2792                 if (retval)
2793                         goto err;
2794                 *io_ptr = undo_io_manager;
2795                 retval = set_undo_io_backup_file(undo_file);
2796                 if (retval)
2797                         goto err;
2798                 printf(_("Overwriting existing filesystem; this can be undone "
2799                          "using the command:\n"
2800                          "    e2undo %s %s\n\n"),
2801                          undo_file, name);
2802                 return retval;
2803         }
2804
2805         /*
2806          * Configuration via a conf file would be
2807          * nice
2808          */
2809         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2810         if (!tdb_dir)
2811                 tdb_dir = "/var/lib/e2fsprogs";
2812
2813         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2814             access(tdb_dir, W_OK))
2815                 return 0;
2816
2817         tmp_name = strdup(name);
2818         if (!tmp_name)
2819                 goto errout;
2820         dev_name = basename(tmp_name);
2821         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2822         if (!tdb_file) {
2823                 free(tmp_name);
2824                 goto errout;
2825         }
2826         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2827         free(tmp_name);
2828
2829         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2830                 retval = errno;
2831                 com_err(program_name, retval,
2832                         _("while trying to delete %s"), tdb_file);
2833                 goto errout;
2834         }
2835
2836         retval = set_undo_io_backing_manager(*io_ptr);
2837         if (retval)
2838                 goto errout;
2839         *io_ptr = undo_io_manager;
2840         retval = set_undo_io_backup_file(tdb_file);
2841         if (retval)
2842                 goto errout;
2843         printf(_("Overwriting existing filesystem; this can be undone "
2844                  "using the command:\n"
2845                  "    e2undo %s %s\n\n"),
2846                  tdb_file, name);
2847
2848         free(tdb_file);
2849         return 0;
2850 errout:
2851         free(tdb_file);
2852 err:
2853         com_err("tune2fs", retval, "while trying to setup undo file\n");
2854         return retval;
2855 }
2856
2857 static int
2858 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2859 {
2860         int retval, nr_users, start;
2861         journal_superblock_t *jsb;
2862         ext2_filsys jfs;
2863         __u8 *j_uuid;
2864         char *journal_path;
2865         char uuid[UUID_STR_SIZE];
2866         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2867
2868         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2869                 return 0;
2870
2871         uuid_unparse(sb->s_journal_uuid, uuid);
2872         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2873         if (!journal_path)
2874                 return 0;
2875
2876         retval = ext2fs_open2(journal_path, io_options,
2877                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2878                               0, 0, unix_io_manager, &jfs);
2879         if (retval) {
2880                 com_err(program_name, retval,
2881                         _("while trying to open %s"),
2882                         journal_path);
2883                 return retval;
2884         }
2885
2886         retval = get_journal_sb(jfs, buf);
2887         if (retval != 0) {
2888                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2889                         fprintf(stderr, _("%s is not a journal device.\n"),
2890                                 journal_path);
2891                 return retval;
2892         }
2893
2894         jsb = (journal_superblock_t *) buf;
2895         /* Find the filesystem UUID */
2896         nr_users = ntohl(jsb->s_nr_users);
2897         if (nr_users > JFS_USERS_MAX) {
2898                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
2899                                  "is too high (%d).\n"), nr_users);
2900                 return EXT2_ET_CORRUPT_JOURNAL_SB;
2901         }
2902
2903         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2904         if (j_uuid == NULL) {
2905                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2906                       stderr);
2907                 return EXT2_ET_LOAD_EXT_JOURNAL;
2908         }
2909
2910         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2911
2912         start = ext2fs_journal_sb_start(jfs->blocksize);
2913         /* Write back the journal superblock */
2914         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2915         if (retval != 0) {
2916                 com_err(program_name, retval,
2917                         "while writing journal superblock.");
2918                 return retval;
2919         }
2920
2921         ext2fs_close(jfs);
2922
2923         return 0;
2924 }
2925
2926 #ifndef BUILD_AS_LIB
2927 int main(int argc, char **argv)
2928 #else
2929 int tune2fs_main(int argc, char **argv)
2930 #endif  /* BUILD_AS_LIB */
2931 {
2932         errcode_t retval;
2933         ext2_filsys fs;
2934         struct ext2_super_block *sb;
2935         io_manager io_ptr, io_ptr_orig = NULL;
2936         int rc = 0;
2937         char default_undo_file[1] = { 0 };
2938
2939 #ifdef ENABLE_NLS
2940         setlocale(LC_MESSAGES, "");
2941         setlocale(LC_CTYPE, "");
2942         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2943         textdomain(NLS_CAT_NAME);
2944         set_com_err_gettext(gettext);
2945 #endif
2946         if (argc && *argv)
2947                 program_name = *argv;
2948         add_error_table(&et_ext2_error_table);
2949
2950 #ifdef CONFIG_BUILD_FINDFS
2951         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2952                 do_findfs(argc, argv);
2953 #endif
2954         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2955                 parse_e2label_options(argc, argv);
2956         else
2957                 parse_tune2fs_options(argc, argv);
2958
2959 #ifdef CONFIG_TESTIO_DEBUG
2960         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2961                 io_ptr = test_io_manager;
2962                 test_io_backing_manager = unix_io_manager;
2963         } else
2964 #endif
2965                 io_ptr = unix_io_manager;
2966
2967 retry_open:
2968         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2969                 open_flag |= EXT2_FLAG_SKIP_MMP;
2970
2971         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2972
2973         /* keep the filesystem struct around to dump MMP data */
2974         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2975
2976         retval = ext2fs_open2(device_name, io_options, open_flag,
2977                               0, 0, io_ptr, &fs);
2978         if (retval) {
2979                 com_err(program_name, retval,
2980                         _("while trying to open %s"),
2981                         device_name);
2982                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2983                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2984                         dump_mmp_msg(fs->mmp_buf,
2985                                      _("If you are sure the filesystem "
2986                                        "is not in use on any node, run:\n"
2987                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2988                 else if (retval == EXT2_ET_MMP_FAILED)
2989                         dump_mmp_msg(fs->mmp_buf, NULL);
2990                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2991                         fprintf(stderr,
2992                                 _("MMP block magic is bad. Try to fix it by "
2993                                   "running:\n'e2fsck -f %s'\n"), device_name);
2994                 else if (retval == EXT2_ET_BAD_MAGIC)
2995                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2996                 else if (retval != EXT2_ET_MMP_FAILED)
2997                         fprintf(stderr, "%s",
2998                              _("Couldn't find valid filesystem superblock.\n"));
2999
3000                 ext2fs_free(fs);
3001                 exit(1);
3002         }
3003         if (ext2fs_has_feature_journal_dev(fs->super)) {
3004                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
3005                 ext2fs_free(fs);
3006                 exit(1);
3007         }
3008         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
3009
3010         if (I_flag) {
3011                 /*
3012                  * Check the inode size is right so we can issue an
3013                  * error message and bail before setting up the tdb
3014                  * file.
3015                  */
3016                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
3017                         fprintf(stderr, _("The inode size is already %lu\n"),
3018                                 new_inode_size);
3019                         rc = 1;
3020                         goto closefs;
3021                 }
3022                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3023                         fprintf(stderr, "%s",
3024                                 _("Shrinking inode size is not supported\n"));
3025                         rc = 1;
3026                         goto closefs;
3027                 }
3028                 if (new_inode_size > fs->blocksize) {
3029                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3030                                 new_inode_size, fs->blocksize);
3031                         rc = 1;
3032                         goto closefs;
3033                 }
3034                 rc = check_fsck_needed(fs,
3035                         _("Resizing inodes could take some time."));
3036                 if (rc)
3037                         goto closefs;
3038                 /*
3039                  * If inode resize is requested use the
3040                  * Undo I/O manager
3041                  */
3042                 undo_file = default_undo_file;
3043         }
3044
3045         /* Set up an undo file */
3046         if (undo_file && io_ptr_orig == NULL) {
3047                 io_ptr_orig = io_ptr;
3048                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3049                 if (retval) {
3050                         rc = 1;
3051                         goto closefs;
3052                 }
3053                 if (io_ptr != io_ptr_orig) {
3054                         ext2fs_close_free(&fs);
3055                         goto retry_open;
3056                 }
3057         }
3058
3059         sb = fs->super;
3060         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3061
3062         if (print_label) {
3063                 /* For e2label emulation */
3064                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3065                 remove_error_table(&et_ext2_error_table);
3066                 goto closefs;
3067         }
3068
3069         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3070         if (retval) {
3071                 com_err("ext2fs_check_if_mount", retval,
3072                         _("while determining whether %s is mounted."),
3073                         device_name);
3074                 rc = 1;
3075                 goto closefs;
3076         }
3077
3078 #ifdef NO_RECOVERY
3079         /* Warn if file system needs recovery and it is opened for writing. */
3080         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3081             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3082             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3083                 fprintf(stderr,
3084 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3085   "\te2fsck -E journal_only %s\n\n"
3086   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3087   "by journal recovery.\n"), device_name);
3088         }
3089 #else
3090         /* Recover the journal if possible. */
3091         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3092             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3093                 printf(_("Recovering journal.\n"));
3094                 retval = ext2fs_run_ext3_journal(&fs);
3095                 if (retval) {
3096                         com_err("tune2fs", retval,
3097                                 "while recovering journal.\n");
3098                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3099                         if (fs)
3100                                 ext2fs_close_free(&fs);
3101                         rc = 1;
3102                         goto closefs;
3103                 }
3104                 sb = fs->super;
3105         }
3106 #endif
3107
3108         /* Normally we only need to write out the superblock */
3109         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3110
3111         if (c_flag) {
3112                 sb->s_max_mnt_count = max_mount_count;
3113                 ext2fs_mark_super_dirty(fs);
3114                 printf(_("Setting maximal mount count to %d\n"),
3115                        max_mount_count);
3116         }
3117         if (C_flag) {
3118                 sb->s_mnt_count = mount_count;
3119                 ext2fs_mark_super_dirty(fs);
3120                 printf(_("Setting current mount count to %d\n"), mount_count);
3121         }
3122         if (e_flag) {
3123                 sb->s_errors = errors;
3124                 ext2fs_mark_super_dirty(fs);
3125                 printf(_("Setting error behavior to %d\n"), errors);
3126         }
3127         if (g_flag) {
3128                 sb->s_def_resgid = resgid;
3129                 ext2fs_mark_super_dirty(fs);
3130                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3131         }
3132         if (i_flag) {
3133                 if ((unsigned long long)interval >= (1ULL << 32)) {
3134                         com_err(program_name, 0,
3135                                 _("interval between checks is too big (%lu)"),
3136                                 interval);
3137                         rc = 1;
3138                         goto closefs;
3139                 }
3140                 sb->s_checkinterval = interval;
3141                 ext2fs_mark_super_dirty(fs);
3142                 printf(_("Setting interval between checks to %lu seconds\n"),
3143                        interval);
3144         }
3145         if (m_flag) {
3146                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3147                                           ext2fs_blocks_count(sb) / 100.0);
3148                 ext2fs_mark_super_dirty(fs);
3149                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3150                         reserved_ratio, ext2fs_r_blocks_count(sb));
3151         }
3152         if (r_flag) {
3153                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3154                         com_err(program_name, 0,
3155                                 _("reserved blocks count is too big (%llu)"),
3156                                 reserved_blocks);
3157                         rc = 1;
3158                         goto closefs;
3159                 }
3160                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3161                 ext2fs_mark_super_dirty(fs);
3162                 printf(_("Setting reserved blocks count to %llu\n"),
3163                        reserved_blocks);
3164         }
3165         if (s_flag == 1) {
3166                 if (ext2fs_has_feature_sparse_super(sb)) {
3167                         fputs(_("\nThe filesystem already has sparse "
3168                                 "superblocks.\n"), stderr);
3169                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3170                         fputs(_("\nSetting the sparse superblock flag not "
3171                                 "supported\nfor filesystems with "
3172                                 "the meta_bg feature enabled.\n"),
3173                                 stderr);
3174                         rc = 1;
3175                         goto closefs;
3176                 } else {
3177                         ext2fs_set_feature_sparse_super(sb);
3178                         sb->s_state &= ~EXT2_VALID_FS;
3179                         ext2fs_mark_super_dirty(fs);
3180                         printf(_("\nSparse superblock flag set.  %s"),
3181                                _(please_fsck));
3182                 }
3183         }
3184         if (s_flag == 0) {
3185                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3186                       stderr);
3187                 rc = 1;
3188                 goto closefs;
3189         }
3190         if (T_flag) {
3191                 sb->s_lastcheck = last_check_time;
3192                 ext2fs_mark_super_dirty(fs);
3193                 printf(_("Setting time filesystem last checked to %s\n"),
3194                        ctime(&last_check_time));
3195         }
3196         if (u_flag) {
3197                 sb->s_def_resuid = resuid;
3198                 ext2fs_mark_super_dirty(fs);
3199                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3200         }
3201         if (L_flag) {
3202                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3203                         fputs(_("Warning: label too long, truncating.\n"),
3204                               stderr);
3205                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3206                 strncpy((char *)sb->s_volume_name, new_label,
3207                         sizeof(sb->s_volume_name));
3208                 ext2fs_mark_super_dirty(fs);
3209         }
3210         if (M_flag) {
3211                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3212                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3213                         sizeof(sb->s_last_mounted));
3214                 ext2fs_mark_super_dirty(fs);
3215         }
3216         if (mntopts_cmd) {
3217                 rc = update_mntopts(fs, mntopts_cmd);
3218                 if (rc)
3219                         goto closefs;
3220         }
3221         if (features_cmd) {
3222                 rc = update_feature_set(fs, features_cmd);
3223                 if (rc)
3224                         goto closefs;
3225         }
3226         if (extended_cmd) {
3227                 rc = parse_extended_opts(fs, extended_cmd);
3228                 if (rc)
3229                         goto closefs;
3230                 if (clear_mmp && !f_flag) {
3231                         fputs(_("Error in using clear_mmp. "
3232                                 "It must be used with -f\n"),
3233                               stderr);
3234                         goto closefs;
3235                 }
3236         }
3237         if (clear_mmp) {
3238                 rc = ext2fs_mmp_clear(fs);
3239                 goto closefs;
3240         }
3241         if (journal_size || journal_device) {
3242                 rc = add_journal(fs);
3243                 if (rc)
3244                         goto closefs;
3245         }
3246
3247         if (Q_flag) {
3248                 if (mount_flags & EXT2_MF_MOUNTED) {
3249                         fputs(_("The quota feature may only be changed when "
3250                                 "the filesystem is unmounted.\n"), stderr);
3251                         rc = 1;
3252                         goto closefs;
3253                 }
3254                 rc = handle_quota_options(fs);
3255                 if (rc)
3256                         goto closefs;
3257         }
3258
3259         if (U_flag) {
3260                 int set_csum = 0;
3261                 dgrp_t i;
3262                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3263                 __u8 old_uuid[UUID_SIZE];
3264
3265                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3266                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3267                      ext2fs_has_feature_ea_inode(fs->super))) {
3268                         rc = check_fsck_needed(fs,
3269                                 _("Setting the UUID on this "
3270                                   "filesystem could take some time."));
3271                         if (rc)
3272                                 goto closefs;
3273                         rewrite_checksums = 1;
3274                 }
3275
3276                 if (ext2fs_has_group_desc_csum(fs)) {
3277                         /*
3278                          * Changing the UUID on a metadata_csum FS requires
3279                          * rewriting all metadata, which can race with a
3280                          * mounted fs.  Don't allow that unless we're saving
3281                          * the checksum seed.
3282                          */
3283                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3284                             !ext2fs_has_feature_csum_seed(fs->super) &&
3285                             ext2fs_has_feature_metadata_csum(fs->super)) {
3286                                 fputs(_("The UUID may only be "
3287                                         "changed when the filesystem is "
3288                                         "unmounted.\n"), stderr);
3289                                 fputs(_("If you only use kernels newer than "
3290                                         "v4.4, run 'tune2fs -O "
3291                                         "metadata_csum_seed' and re-run this "
3292                                         "command.\n"), stderr);
3293                                 try_confirm_csum_seed_support();
3294                                 rc = 1;
3295                                 goto closefs;
3296                         }
3297
3298                         /*
3299                          * Determine if the block group checksums are
3300                          * correct so we know whether or not to set
3301                          * them later on.
3302                          */
3303                         for (i = 0; i < fs->group_desc_count; i++)
3304                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3305                                         break;
3306                         if (i >= fs->group_desc_count)
3307                                 set_csum = 1;
3308                 }
3309
3310                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3311                 if ((strcasecmp(new_UUID, "null") == 0) ||
3312                     (strcasecmp(new_UUID, "clear") == 0)) {
3313                         uuid_clear(sb->s_uuid);
3314                 } else if (strcasecmp(new_UUID, "time") == 0) {
3315                         uuid_generate_time(sb->s_uuid);
3316                 } else if (strcasecmp(new_UUID, "random") == 0) {
3317                         uuid_generate(sb->s_uuid);
3318                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3319                         com_err(program_name, 0, "%s",
3320                                 _("Invalid UUID format\n"));
3321                         rc = 1;
3322                         goto closefs;
3323                 }
3324                 ext2fs_init_csum_seed(fs);
3325                 if (set_csum) {
3326                         for (i = 0; i < fs->group_desc_count; i++)
3327                                 ext2fs_group_desc_csum_set(fs, i);
3328                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3329                 }
3330
3331                 /* If this is a journal dev, we need to copy UUID into jsb */
3332                 if (!(rc = get_journal_sb(fs, buf))) {
3333                         journal_superblock_t *jsb;
3334
3335                         jsb = (journal_superblock_t *) buf;
3336                         fputs(_("Need to update journal superblock.\n"), stdout);
3337                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3338
3339                         /* Writeback the journal superblock */
3340                         if ((rc = io_channel_write_blk64(fs->io,
3341                                 ext2fs_journal_sb_start(fs->blocksize),
3342                                         -SUPERBLOCK_SIZE, buf)))
3343                                 goto closefs;
3344                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3345                         goto closefs;
3346                 else {
3347                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3348
3349                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3350                                 goto closefs;
3351                 }
3352
3353                 ext2fs_mark_super_dirty(fs);
3354         }
3355
3356         if (I_flag) {
3357                 if (mount_flags & EXT2_MF_MOUNTED) {
3358                         fputs(_("The inode size may only be "
3359                                 "changed when the filesystem is "
3360                                 "unmounted.\n"), stderr);
3361                         rc = 1;
3362                         goto closefs;
3363                 }
3364                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3365                         fputs(_("Changing the inode size not supported for "
3366                                 "filesystems with the flex_bg\n"
3367                                 "feature enabled.\n"),
3368                               stderr);
3369                         rc = 1;
3370                         goto closefs;
3371                 }
3372                 /*
3373                  * We want to update group descriptor also
3374                  * with the new free inode count
3375                  */
3376                 if (rewrite_checksums)
3377                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3378                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3379                 retval = resize_inode(fs, new_inode_size);
3380                 if (rewrite_checksums)
3381                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3382                 if (retval == 0) {
3383                         printf(_("Setting inode size %lu\n"),
3384                                                         new_inode_size);
3385                         rewrite_checksums = 1;
3386                 } else {
3387                         printf("%s", _("Failed to change inode size\n"));
3388                         rc = 1;
3389                         goto closefs;
3390                 }
3391         }
3392
3393         if (rewrite_checksums)
3394                 rewrite_metadata_checksums(fs);
3395
3396         if (l_flag)
3397                 list_super(sb);
3398         if (stride_set) {
3399                 sb->s_raid_stride = stride;
3400                 ext2fs_mark_super_dirty(fs);
3401                 printf(_("Setting stride size to %d\n"), stride);
3402         }
3403         if (stripe_width_set) {
3404                 sb->s_raid_stripe_width = stripe_width;
3405                 ext2fs_mark_super_dirty(fs);
3406                 printf(_("Setting stripe width to %d\n"), stripe_width);
3407         }
3408         if (ext_mount_opts) {
3409                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3410                         sizeof(fs->super->s_mount_opts));
3411                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3412                 ext2fs_mark_super_dirty(fs);
3413                 printf(_("Setting extended default mount options to '%s'\n"),
3414                        ext_mount_opts);
3415                 free(ext_mount_opts);
3416         }
3417
3418         free(device_name);
3419         remove_error_table(&et_ext2_error_table);
3420
3421 closefs:
3422         if (rc) {
3423                 ext2fs_mmp_stop(fs);
3424 #ifndef BUILD_AS_LIB
3425                 exit(1);
3426 #endif
3427         }
3428
3429         if (feature_64bit)
3430                 convert_64bit(fs, feature_64bit);
3431         return (ext2fs_close_free(&fs) ? 1 : 0);
3432 }