misc/tune2fs.c

   1 /*
   2  * tune2fs.c - Change the file system parameters on an ext2 file system
   3  *
   4  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                                 Laboratoire MASI, Institut Blaise Pascal
   6  *                                 Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
   9  *
  10  * %Begin-Header%
  11  * This file may be redistributed under the terms of the GNU Public
  12  * License.
  13  * %End-Header%
  14  */
  15
  16 /*
  17  * History:
  18  * 93/06/01     - Creation
  19  * 93/10/31     - Added the -c option to change the maximal mount counts
  20  * 93/12/14     - Added -l flag to list contents of superblock
  21  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  22  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  23  * 93/12/29     - Added the -e option to change errors behavior
  24  * 94/02/27     - Ported to use the ext2fs library
  25  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  26  */
  27
  28 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() */
  29 #include "config.h"
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #ifdef HAVE_STDLIB_H
  41 #include <stdlib.h>
  42 #endif
  43 #ifdef HAVE_STRINGS_H
  44 #include <strings.h>    /* for strcasecmp() */
  45 #else
  46 #define _BSD_SOURCE     /* for inclusion of strcasecmp() via <string.h> */
  47 #define _DEFAULT_SOURCE   /* since glibc 2.20 _BSD_SOURCE is deprecated */
  48 #endif
  49 #include <string.h>
  50 #include <time.h>
  51 #include <unistd.h>
  52 #include <sys/types.h>
  53 #include <libgen.h>
  54 #include <limits.h>
  55
  56 #include "ext2fs/ext2_fs.h"
  57 #include "ext2fs/ext2fs.h"
  58 #include "ext2fs/kernel-jbd.h"
  59 #include "et/com_err.h"
  60 #include "support/plausible.h"
  61 #include "support/quotaio.h"
  62 #include "uuid/uuid.h"
  63 #include "e2p/e2p.h"
  64 #include "util.h"
  65 #include "blkid/blkid.h"
  66
  67 #include "../version.h"
  68 #include "support/nls-enable.h"
  69
  70 #define QOPT_ENABLE     (1)
  71 #define QOPT_DISABLE    (-1)
  72
  73 extern int ask_yn(const char *string, int def);
  74
  75 const char *program_name = "tune2fs";
  76 char *device_name;
  77 char *new_label, *new_last_mounted, *new_UUID;
  78 char *io_options;
  79 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  80 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  81 static int I_flag;
  82 static int clear_mmp;
  83 static time_t last_check_time;
  84 static int print_label;
  85 static int max_mount_count, mount_count, mount_flags;
  86 static unsigned long interval;
  87 static blk64_t reserved_blocks;
  88 static double reserved_ratio;
  89 static unsigned long resgid, resuid;
  90 static unsigned short errors;
  91 static int open_flag;
  92 static char *features_cmd;
  93 static char *mntopts_cmd;
  94 static int stride, stripe_width;
  95 static int stride_set, stripe_width_set;
  96 static char *extended_cmd;
  97 static unsigned long new_inode_size;
  98 static char *ext_mount_opts;
  99 static int quota_enable[MAXQUOTAS];
 100 static int rewrite_checksums;
 101 static int feature_64bit;
 102 static int fsck_requested;
 103 static char *undo_file;
 104
 105 int journal_size, journal_flags;
 106 char *journal_device;
 107 static blk64_t journal_location = ~0LL;
 108
 109 static struct list_head blk_move_list;
 110
 111 struct blk_move {
 112         struct list_head list;
 113         blk64_t old_loc;
 114         blk64_t new_loc;
 115 };
 116
 117 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 118
 119 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 120
 121 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 122 static const char *please_dir_fsck =
 123                 N_("Please run e2fsck -fD on the filesystem.\n");
 124
 125 #ifdef CONFIG_BUILD_FINDFS
 126 void do_findfs(int argc, char **argv);
 127 #endif
 128
 129 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 130 int journal_enable_debug = -1;
 131 #endif
 132
 133 static void usage(void)
 134 {
 135         fprintf(stderr,
 136                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 137                   "[-g group]\n"
 138                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 139                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 140                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 141                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 142                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 143                   "\t[-E extended-option[,...]] [-T last_check_time] "
 144                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 145                 program_name);
 146         exit(1);
 147 }
 148
 149 static __u32 ok_features[3] = {
 150         /* Compat */
 151         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 152                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 153         /* Incompat */
 154         EXT2_FEATURE_INCOMPAT_FILETYPE |
 155                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 156                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 157                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 158                 EXT4_FEATURE_INCOMPAT_MMP |
 159                 EXT4_FEATURE_INCOMPAT_64BIT |
 160                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 161                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 162                 EXT4_FEATURE_INCOMPAT_LARGEDIR,
 163         /* R/O compat */
 164         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 165                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 166                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 167                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 168                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 169                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 170                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 171                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 172                 EXT4_FEATURE_RO_COMPAT_READONLY |
 173                 EXT4_FEATURE_RO_COMPAT_PROJECT
 174 };
 175
 176 static __u32 clear_ok_features[3] = {
 177         /* Compat */
 178         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 179                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 180                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 181         /* Incompat */
 182         EXT2_FEATURE_INCOMPAT_FILETYPE |
 183                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 184                 EXT4_FEATURE_INCOMPAT_MMP |
 185                 EXT4_FEATURE_INCOMPAT_64BIT |
 186                 EXT4_FEATURE_INCOMPAT_CSUM_SEED,
 187         /* R/O compat */
 188         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 189                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 190                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 191                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 192                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 193                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 194                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 195                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 196                 EXT4_FEATURE_RO_COMPAT_READONLY
 197 };
 198
 199 /**
 200  * Try to get journal super block if any
 201  */
 202 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 203 {
 204         int retval;
 205         journal_superblock_t *jsb;
 206
 207         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 208                 return EXT2_ET_UNSUPP_FEATURE;
 209         }
 210
 211         /* Get the journal superblock */
 212         if ((retval = io_channel_read_blk64(jfs->io,
 213             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 214                 com_err(program_name, retval, "%s",
 215                 _("while reading journal superblock"));
 216                 return retval;
 217         }
 218
 219         jsb = (journal_superblock_t *) buf;
 220         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 221             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 222                 fputs(_("Journal superblock not found!\n"), stderr);
 223                 return EXT2_ET_BAD_MAGIC;
 224         }
 225
 226         return 0;
 227 }
 228
 229 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 230                           int nr_users)
 231 {
 232         int i;
 233         for (i = 0; i < nr_users; i++) {
 234                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 235                         return &s_users[i * UUID_SIZE];
 236         }
 237
 238         return NULL;
 239 }
 240
 241 /*
 242  * Remove an external journal from the filesystem
 243  */
 244 static int remove_journal_device(ext2_filsys fs)
 245 {
 246         char            *journal_path;
 247         ext2_filsys     jfs;
 248         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 249         journal_superblock_t    *jsb;
 250         int             i, nr_users;
 251         errcode_t       retval;
 252         int             commit_remove_journal = 0;
 253         io_manager      io_ptr;
 254
 255         if (f_flag)
 256                 commit_remove_journal = 1; /* force removal even if error */
 257
 258         uuid_unparse(fs->super->s_journal_uuid, buf);
 259         journal_path = blkid_get_devname(NULL, "UUID", buf);
 260
 261         if (!journal_path) {
 262                 journal_path =
 263                         ext2fs_find_block_device(fs->super->s_journal_dev);
 264                 if (!journal_path)
 265                         goto no_valid_journal;
 266         }
 267
 268 #ifdef CONFIG_TESTIO_DEBUG
 269         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 270                 io_ptr = test_io_manager;
 271                 test_io_backing_manager = unix_io_manager;
 272         } else
 273 #endif
 274                 io_ptr = unix_io_manager;
 275         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 276                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 277                              fs->blocksize, io_ptr, &jfs);
 278         if (retval) {
 279                 com_err(program_name, retval, "%s",
 280                         _("while trying to open external journal"));
 281                 goto no_valid_journal;
 282         }
 283
 284         if ((retval = get_journal_sb(jfs, buf))) {
 285                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 286                         fprintf(stderr, _("%s is not a journal device.\n"),
 287                                 journal_path);
 288                 goto no_valid_journal;
 289         }
 290
 291         jsb = (journal_superblock_t *) buf;
 292         /* Find the filesystem UUID */
 293         nr_users = ntohl(jsb->s_nr_users);
 294
 295         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 296                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 297                       stderr);
 298                 commit_remove_journal = 1;
 299                 goto no_valid_journal;
 300         }
 301         nr_users--;
 302         for (i = 0; i < nr_users; i++)
 303                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 304         jsb->s_nr_users = htonl(nr_users);
 305
 306         /* Write back the journal superblock */
 307         retval = io_channel_write_blk64(jfs->io,
 308                                         ext2fs_journal_sb_start(fs->blocksize),
 309                                         -SUPERBLOCK_SIZE, buf);
 310         if (retval) {
 311                 com_err(program_name, retval,
 312                         "while writing journal superblock.");
 313                 goto no_valid_journal;
 314         }
 315
 316         commit_remove_journal = 1;
 317
 318 no_valid_journal:
 319         if (commit_remove_journal == 0) {
 320                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 321                         "Use -f option to remove missing journal device.\n"),
 322                       stderr);
 323                 return 1;
 324         }
 325         fs->super->s_journal_dev = 0;
 326         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 327         uuid_clear(fs->super->s_journal_uuid);
 328         ext2fs_mark_super_dirty(fs);
 329         fputs(_("Journal removed\n"), stdout);
 330         free(journal_path);
 331
 332         return 0;
 333 }
 334
 335 /* Helper function for remove_journal_inode */
 336 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 337                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 338                                blk64_t ref_block EXT2FS_ATTR((unused)),
 339                                int ref_offset EXT2FS_ATTR((unused)),
 340                                void *private EXT2FS_ATTR((unused)))
 341 {
 342         blk64_t block;
 343         int     group;
 344
 345         block = *blocknr;
 346         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 347         group = ext2fs_group_of_blk2(fs, block);
 348         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 349         ext2fs_group_desc_csum_set(fs, group);
 350         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 351         return 0;
 352 }
 353
 354 /*
 355  * Remove the journal inode from the filesystem
 356  */
 357 static errcode_t remove_journal_inode(ext2_filsys fs)
 358 {
 359         struct ext2_inode       inode;
 360         errcode_t               retval;
 361         ino_t                   ino = fs->super->s_journal_inum;
 362
 363         retval = ext2fs_read_inode(fs, ino,  &inode);
 364         if (retval) {
 365                 com_err(program_name, retval, "%s",
 366                         _("while reading journal inode"));
 367                 return retval;
 368         }
 369         if (ino == EXT2_JOURNAL_INO) {
 370                 retval = ext2fs_read_bitmaps(fs);
 371                 if (retval) {
 372                         com_err(program_name, retval, "%s",
 373                                 _("while reading bitmaps"));
 374                         return retval;
 375                 }
 376                 retval = ext2fs_block_iterate3(fs, ino,
 377                                                BLOCK_FLAG_READ_ONLY, NULL,
 378                                                release_blocks_proc, NULL);
 379                 if (retval) {
 380                         com_err(program_name, retval, "%s",
 381                                 _("while clearing journal inode"));
 382                         return retval;
 383                 }
 384                 memset(&inode, 0, sizeof(inode));
 385                 ext2fs_mark_bb_dirty(fs);
 386                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 387         } else
 388                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 389         retval = ext2fs_write_inode(fs, ino, &inode);
 390         if (retval) {
 391                 com_err(program_name, retval, "%s",
 392                         _("while writing journal inode"));
 393                 return retval;
 394         }
 395         fs->super->s_journal_inum = 0;
 396         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 397         ext2fs_mark_super_dirty(fs);
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * Update the default mount options
 404  */
 405 static int update_mntopts(ext2_filsys fs, char *mntopts)
 406 {
 407         struct ext2_super_block *sb = fs->super;
 408
 409         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 410                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 411                         mntopts);
 412                 return 1;
 413         }
 414         ext2fs_mark_super_dirty(fs);
 415
 416         return 0;
 417 }
 418
 419 static void check_fsck_needed(ext2_filsys fs, const char *prompt)
 420 {
 421         /* Refuse to modify anything but a freshly checked valid filesystem. */
 422         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 423             (fs->super->s_state & EXT2_ERROR_FS) ||
 424             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 425                 puts(_(fsck_explain));
 426                 puts(_(please_fsck));
 427                 if (mount_flags & EXT2_MF_READONLY)
 428                         printf("%s", _("(and reboot afterwards!)\n"));
 429                 exit(1);
 430         }
 431
 432         /* Give the admin a few seconds to bail out of a dangerous op. */
 433         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 434                 return;
 435
 436         puts(prompt);
 437         proceed_question(5);
 438 }
 439
 440 static void request_dir_fsck_afterwards(ext2_filsys fs)
 441 {
 442         static int requested;
 443
 444         if (requested++)
 445                 return;
 446         fsck_requested++;
 447         fs->super->s_state &= ~EXT2_VALID_FS;
 448         puts(_(fsck_explain));
 449         puts(_(please_dir_fsck));
 450         if (mount_flags & EXT2_MF_READONLY)
 451                 printf("%s", _("(and reboot afterwards!)\n"));
 452 }
 453
 454 static void request_fsck_afterwards(ext2_filsys fs)
 455 {
 456         static int requested = 0;
 457
 458         if (requested++)
 459                 return;
 460         fsck_requested++;
 461         fs->super->s_state &= ~EXT2_VALID_FS;
 462         printf("\n%s\n", _(please_fsck));
 463         if (mount_flags & EXT2_MF_READONLY)
 464                 printf("%s", _("(and reboot afterwards!)\n"));
 465 }
 466
 467 static void convert_64bit(ext2_filsys fs, int direction)
 468 {
 469         /*
 470          * Is resize2fs going to demand a fsck run? Might as well tell the
 471          * user now.
 472          */
 473         if (!fsck_requested &&
 474             ((fs->super->s_state & EXT2_ERROR_FS) ||
 475              !(fs->super->s_state & EXT2_VALID_FS) ||
 476              fs->super->s_lastcheck < fs->super->s_mtime))
 477                 request_fsck_afterwards(fs);
 478         if (fsck_requested)
 479                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 480                         direction > 0 ? "-b" : "-s", fs->device_name);
 481         else
 482                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 483                         direction > 0 ? "-b" : "-s", fs->device_name);
 484
 485         if (undo_file)
 486                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 487         if (direction > 0)
 488                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 489         else
 490                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 491 }
 492
 493 /* Rewrite extents */
 494 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 495                                  struct ext2_inode *inode)
 496 {
 497         ext2_extent_handle_t    handle;
 498         struct ext2fs_extent    extent;
 499         errcode_t               errcode;
 500         struct ext2_extent_info info;
 501
 502         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 503             !ext2fs_has_feature_metadata_csum(fs->super))
 504                 return 0;
 505
 506         errcode = ext2fs_extent_open(fs, ino, &handle);
 507         if (errcode)
 508                 return errcode;
 509
 510         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 511         if (errcode)
 512                 goto out;
 513
 514         do {
 515                 errcode = ext2fs_extent_get_info(handle, &info);
 516                 if (errcode)
 517                         break;
 518
 519                 /*
 520                  * If this is the first extent in an extent block that we
 521                  * haven't visited, rewrite the extent to force the ETB
 522                  * checksum to be rewritten.
 523                  */
 524                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 525                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 526                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 527                         if (errcode)
 528                                 break;
 529                 }
 530
 531                 /* Skip to the end of a block of leaf nodes */
 532                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 533                         errcode = ext2fs_extent_get(handle,
 534                                                     EXT2_EXTENT_LAST_SIB,
 535                                                     &extent);
 536                         if (errcode)
 537                                 break;
 538                 }
 539
 540                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 541         } while (errcode == 0);
 542
 543 out:
 544         /* Ok if we run off the end */
 545         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 546                 errcode = 0;
 547         ext2fs_extent_free(handle);
 548         return errcode;
 549 }
 550
 551 /*
 552  * Rewrite directory blocks with checksums
 553  */
 554 struct rewrite_dir_context {
 555         char *buf;
 556         errcode_t errcode;
 557         ext2_ino_t dir;
 558         int is_htree;
 559 };
 560
 561 static int rewrite_dir_block(ext2_filsys fs,
 562                              blk64_t    *blocknr,
 563                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 564                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 565                              int        ref_offset EXT2FS_ATTR((unused)),
 566                              void       *priv_data)
 567 {
 568         struct ext2_dx_countlimit *dcl = NULL;
 569         struct rewrite_dir_context *ctx = priv_data;
 570         int dcl_offset, changed = 0;
 571
 572         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 573                                               ctx->dir);
 574         if (ctx->errcode)
 575                 return BLOCK_ABORT;
 576
 577         /* if htree node... */
 578         if (ctx->is_htree)
 579                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 580                                          &dcl, &dcl_offset);
 581         if (dcl) {
 582                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 583                         /* Ensure limit is the max size */
 584                         int max_entries = (fs->blocksize - dcl_offset) /
 585                                           sizeof(struct ext2_dx_entry);
 586                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 587                                 changed = 1;
 588                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 589                         }
 590                 } else {
 591                         /* If htree block is full then rebuild the dir */
 592                         if (ext2fs_le16_to_cpu(dcl->count) ==
 593                             ext2fs_le16_to_cpu(dcl->limit)) {
 594                                 request_dir_fsck_afterwards(fs);
 595                                 return 0;
 596                         }
 597                         /*
 598                          * Ensure dcl->limit is small enough to leave room for
 599                          * the checksum tail.
 600                          */
 601                         int max_entries = (fs->blocksize - (dcl_offset +
 602                                                 sizeof(struct ext2_dx_tail))) /
 603                                           sizeof(struct ext2_dx_entry);
 604                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 605                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 606                         /* Always rewrite checksum */
 607                         changed = 1;
 608                 }
 609         } else {
 610                 unsigned int rec_len, name_size;
 611                 char *top = ctx->buf + fs->blocksize;
 612                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 613                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 614
 615                 /* Find last and penultimate dirent */
 616                 while ((char *)de < top) {
 617                         penultimate_de = last_de;
 618                         last_de = de;
 619                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 620                         if (!ctx->errcode && !rec_len)
 621                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 622                         if (ctx->errcode)
 623                                 return BLOCK_ABORT;
 624                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 625                 }
 626                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 627                 if (ctx->errcode)
 628                         return BLOCK_ABORT;
 629                 name_size = ext2fs_dirent_name_len(last_de);
 630
 631                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 632                         if (!penultimate_de)
 633                                 return 0;
 634                         if (last_de->inode ||
 635                             name_size ||
 636                             rec_len != sizeof(struct ext2_dir_entry_tail))
 637                                 return 0;
 638                         /*
 639                          * The last dirent is unused and the right length to
 640                          * have stored a checksum.  Erase it.
 641                          */
 642                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 643                                                           &rec_len);
 644                         if (!rec_len)
 645                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 646                         if (ctx->errcode)
 647                                 return BLOCK_ABORT;
 648                         ext2fs_set_rec_len(fs, rec_len +
 649                                         sizeof(struct ext2_dir_entry_tail),
 650                                         penultimate_de);
 651                         changed = 1;
 652                 } else {
 653                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 654                         struct ext2_dir_entry_tail *t;
 655
 656                         /*
 657                          * If the last dirent looks like the tail, just update
 658                          * the checksum.
 659                          */
 660                         if (!last_de->inode &&
 661                             rec_len == csum_size) {
 662                                 t = (struct ext2_dir_entry_tail *)last_de;
 663                                 t->det_reserved_name_len =
 664                                                 EXT2_DIR_NAME_LEN_CSUM;
 665                                 changed = 1;
 666                                 goto out;
 667                         }
 668                         if (name_size & 3)
 669                                 name_size = (name_size & ~3) + 4;
 670                         /* If there's not enough space for the tail, e2fsck */
 671                         if (rec_len <= (8 + name_size + csum_size)) {
 672                                 request_dir_fsck_afterwards(fs);
 673                                 return 0;
 674                         }
 675                         /* Shorten that last de and insert the tail */
 676                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 677                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 678                         ext2fs_initialize_dirent_tail(fs, t);
 679
 680                         /* Always update checksum */
 681                         changed = 1;
 682                 }
 683         }
 684
 685 out:
 686         if (!changed)
 687                 return 0;
 688
 689         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 690                                                0, ctx->dir);
 691         if (ctx->errcode)
 692                 return BLOCK_ABORT;
 693
 694         return 0;
 695 }
 696
 697 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 698                                    struct ext2_inode *inode)
 699 {
 700         errcode_t       retval;
 701         struct rewrite_dir_context ctx;
 702
 703         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 704         if (retval)
 705                 return retval;
 706
 707         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 708         ctx.dir = dir;
 709         ctx.errcode = 0;
 710         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 711                                                 BLOCK_FLAG_DATA_ONLY,
 712                                        0, rewrite_dir_block, &ctx);
 713
 714         ext2fs_free_mem(&ctx.buf);
 715         if (retval)
 716                 return retval;
 717
 718         return ctx.errcode;
 719 }
 720
 721 /*
 722  * Context information that does not change across rewrite_one_inode()
 723  * invocations.
 724  */
 725 struct rewrite_context {
 726         ext2_filsys fs;
 727         struct ext2_inode *zero_inode;
 728         char *ea_buf;
 729         int inode_size;
 730 };
 731
 732 #define fatal_err(code, args...)                \
 733         do {                                    \
 734                 com_err(__func__, code, args);  \
 735                 exit(1);                        \
 736         } while (0);
 737
 738 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 739                                  struct ext2_inode *inode)
 740 {
 741         errcode_t retval;
 742         ext2_file_t file;
 743         __u32 hash;
 744
 745         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 746         if (retval)
 747                 fatal_err(retval, "open ea_inode");
 748         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 749                                   NULL);
 750         if (retval)
 751                 fatal_err(retval, "read ea_inode");
 752         retval = ext2fs_file_close(file);
 753         if (retval)
 754                 fatal_err(retval, "close ea_inode");
 755
 756         hash = ext2fs_crc32c_le(ctx->fs->csum_seed, ctx->ea_buf, inode->i_size);
 757         ext2fs_set_ea_inode_hash(inode, hash);
 758 }
 759
 760 static int update_xattr_entry_hashes(ext2_filsys fs,
 761                                      struct ext2_ext_attr_entry *entry,
 762                                      struct ext2_ext_attr_entry *end)
 763 {
 764         int modified = 0;
 765         errcode_t retval;
 766
 767         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 768                 if (entry->e_value_inum) {
 769                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 770                                                              &entry->e_hash);
 771                         if (retval)
 772                                 fatal_err(retval, "hash ea_inode entry");
 773                         modified = 1;
 774                 }
 775                 entry = EXT2_EXT_ATTR_NEXT(entry);
 776         }
 777         return modified;
 778 }
 779
 780 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 781                                        struct ext2_inode_large *inode)
 782 {
 783         struct ext2_ext_attr_entry *start, *end;
 784         __u32 *ea_magic;
 785
 786         if (inode->i_extra_isize == 0)
 787                 return;
 788
 789         if (inode->i_extra_isize & 3 ||
 790             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 791                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 792
 793         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 794                                 inode->i_extra_isize);
 795         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 796                 return;
 797
 798         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 799         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 800
 801         update_xattr_entry_hashes(ctx->fs, start, end);
 802 }
 803
 804 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 805                                       void *block_buf)
 806 {
 807         struct ext2_ext_attr_header *header;
 808         struct ext2_ext_attr_entry *start, *end;
 809
 810         header = (struct ext2_ext_attr_header *)block_buf;
 811         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 812                 return;
 813
 814         start = (struct ext2_ext_attr_entry *)(header+1);
 815         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 816
 817         if (update_xattr_entry_hashes(ctx->fs, start, end))
 818                 ext2fs_ext_attr_block_rehash(header, end);
 819 }
 820
 821 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 822                               struct ext2_inode *inode)
 823 {
 824         blk64_t file_acl_block;
 825         errcode_t retval;
 826
 827         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 828                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 829                         return;
 830                 memset(inode, 0, ctx->inode_size);
 831         }
 832
 833         if (inode->i_flags & EXT4_EA_INODE_FL)
 834                 update_ea_inode_hash(ctx, ino, inode);
 835
 836         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 837                 update_inline_xattr_hashes(ctx,
 838                                            (struct ext2_inode_large *)inode);
 839
 840         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 841         if (retval)
 842                 fatal_err(retval, "while writing inode");
 843
 844         retval = rewrite_extents(ctx->fs, ino, inode);
 845         if (retval)
 846                 fatal_err(retval, "while rewriting extents");
 847
 848         if (LINUX_S_ISDIR(inode->i_mode) &&
 849             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 850                 retval = rewrite_directory(ctx->fs, ino, inode);
 851                 if (retval)
 852                         fatal_err(retval, "while rewriting directories");
 853         }
 854
 855         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 856         if (!file_acl_block)
 857                 return;
 858
 859         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 860                                        ino);
 861         if (retval)
 862                 fatal_err(retval, "while rewriting extended attribute");
 863
 864         update_block_xattr_hashes(ctx, ctx->ea_buf);
 865         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 866                                         ino);
 867         if (retval)
 868                 fatal_err(retval, "while rewriting extended attribute");
 869 }
 870
 871 /*
 872  * Forcibly set checksums in all inodes.
 873  */
 874 static void rewrite_inodes(ext2_filsys fs)
 875 {
 876         ext2_inode_scan scan;
 877         errcode_t       retval;
 878         ext2_ino_t      ino;
 879         struct ext2_inode *inode;
 880         int pass;
 881         struct rewrite_context ctx = {
 882                 .fs = fs,
 883                 .inode_size = EXT2_INODE_SIZE(fs->super),
 884         };
 885
 886         if (fs->super->s_creator_os == EXT2_OS_HURD)
 887                 return;
 888
 889         retval = ext2fs_get_mem(ctx.inode_size, &inode);
 890         if (retval)
 891                 fatal_err(retval, "while allocating memory");
 892
 893         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 894         if (retval)
 895                 fatal_err(retval, "while allocating memory");
 896
 897         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 898         if (retval)
 899                 fatal_err(retval, "while allocating memory");
 900
 901         /*
 902          * Extended attribute inodes have a lookup hash that needs to be
 903          * recalculated with the new csum_seed. Other inodes referencing xattr
 904          * inodes need this value to be up to date. That's why we do two passes:
 905          *
 906          * pass 1: update xattr inodes to update their lookup hash as well as
 907          *         other checksums.
 908          *
 909          * pass 2: go over other inodes to update their checksums.
 910          */
 911         if (ext2fs_has_feature_ea_inode(fs->super))
 912                 pass = 1;
 913         else
 914                 pass = 2;
 915         for (;pass <= 2; pass++) {
 916                 retval = ext2fs_open_inode_scan(fs, 0, &scan);
 917                 if (retval)
 918                         fatal_err(retval, "while opening inode scan");
 919
 920                 do {
 921                         retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 922                                                             ctx.inode_size);
 923                         if (retval)
 924                                 fatal_err(retval, "while getting next inode");
 925                         if (!ino)
 926                                 break;
 927
 928                         if (((pass == 1) &&
 929                              (inode->i_flags & EXT4_EA_INODE_FL)) ||
 930                             ((pass == 2) &&
 931                              !(inode->i_flags & EXT4_EA_INODE_FL)))
 932                                 rewrite_one_inode(&ctx, ino, inode);
 933                 } while (ino);
 934
 935                 ext2fs_close_inode_scan(scan);
 936         }
 937
 938         ext2fs_free_mem(&ctx.zero_inode);
 939         ext2fs_free_mem(&ctx.ea_buf);
 940         ext2fs_free_mem(&inode);
 941 }
 942
 943 static void rewrite_metadata_checksums(ext2_filsys fs)
 944 {
 945         errcode_t retval;
 946         dgrp_t i;
 947
 948         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 949         ext2fs_init_csum_seed(fs);
 950         for (i = 0; i < fs->group_desc_count; i++)
 951                 ext2fs_group_desc_csum_set(fs, i);
 952         retval = ext2fs_read_bitmaps(fs);
 953         if (retval)
 954                 fatal_err(retval, "while reading bitmaps");
 955         rewrite_inodes(fs);
 956         ext2fs_mark_ib_dirty(fs);
 957         ext2fs_mark_bb_dirty(fs);
 958         ext2fs_mmp_update2(fs, 1);
 959         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 960         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 961         if (ext2fs_has_feature_metadata_csum(fs->super))
 962                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 963         else
 964                 fs->super->s_checksum_type = 0;
 965         ext2fs_mark_super_dirty(fs);
 966 }
 967
 968 static void enable_uninit_bg(ext2_filsys fs)
 969 {
 970         struct ext2_group_desc *gd;
 971         dgrp_t i;
 972
 973         for (i = 0; i < fs->group_desc_count; i++) {
 974                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 975                 gd->bg_itable_unused = 0;
 976                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 977                 ext2fs_group_desc_csum_set(fs, i);
 978         }
 979         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 980 }
 981
 982 static errcode_t zero_empty_inodes(ext2_filsys fs)
 983 {
 984         int length = EXT2_INODE_SIZE(fs->super);
 985         struct ext2_inode *inode = NULL;
 986         ext2_inode_scan scan;
 987         errcode_t       retval;
 988         ext2_ino_t      ino;
 989
 990         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 991         if (retval)
 992                 goto out;
 993
 994         retval = ext2fs_get_mem(length, &inode);
 995         if (retval)
 996                 goto out;
 997
 998         do {
 999                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
1000                 if (retval)
1001                         goto out;
1002                 if (!ino)
1003                         break;
1004                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
1005                         memset(inode, 0, length);
1006                         retval = ext2fs_write_inode_full(fs, ino, inode,
1007                                                          length);
1008                         if (retval)
1009                                 goto out;
1010                 }
1011         } while (1);
1012
1013 out:
1014         ext2fs_free_mem(&inode);
1015         ext2fs_close_inode_scan(scan);
1016         return retval;
1017 }
1018
1019 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1020 {
1021         struct ext2_group_desc *gd;
1022         dgrp_t i;
1023         errcode_t retval;
1024         blk64_t b, c, d;
1025
1026         /* Load bitmaps to ensure that the uninit ones get written out */
1027         fs->super->s_feature_ro_compat |= csum_feature_flag;
1028         retval = ext2fs_read_bitmaps(fs);
1029         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1030         if (retval) {
1031                 com_err("disable_uninit_bg", retval,
1032                         "while reading bitmaps");
1033                 request_fsck_afterwards(fs);
1034                 return retval;
1035         }
1036         ext2fs_mark_ib_dirty(fs);
1037         ext2fs_mark_bb_dirty(fs);
1038
1039         /* If we're only turning off uninit_bg, zero the inodes */
1040         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1041                 retval = zero_empty_inodes(fs);
1042                 if (retval) {
1043                         com_err("disable_uninit_bg", retval,
1044                                 "while zeroing unused inodes");
1045                         request_fsck_afterwards(fs);
1046                         return retval;
1047                 }
1048         }
1049
1050         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1051         for (i = 0; i < fs->group_desc_count; i++) {
1052                 b = ext2fs_block_bitmap_loc(fs, i);
1053                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1054                 b = ext2fs_inode_bitmap_loc(fs, i);
1055                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1056
1057                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1058                 if (retval == 0 && b)
1059                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1060                 if (retval == 0 && c)
1061                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1062                 if (retval == 0 && d)
1063                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1064                 if (retval) {
1065                         com_err("disable_uninit_bg", retval,
1066                                 "while initializing block bitmaps");
1067                         request_fsck_afterwards(fs);
1068                 }
1069
1070                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1071                 gd->bg_itable_unused = 0;
1072                 gd->bg_flags = 0;
1073                 ext2fs_group_desc_csum_set(fs, i);
1074         }
1075         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1076         ext2fs_mark_super_dirty(fs);
1077
1078         return 0;
1079 }
1080
1081 static void
1082 try_confirm_csum_seed_support(void)
1083 {
1084         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1085                 fputs(_("WARNING: Could not confirm kernel support for "
1086                         "metadata_csum_seed.\n  This requires Linux >= "
1087                         "v4.4.\n"), stderr);
1088 }
1089
1090 /*
1091  * Update the feature set as provided by the user.
1092  */
1093 static int update_feature_set(ext2_filsys fs, char *features)
1094 {
1095         struct ext2_super_block *sb = fs->super;
1096         __u32           old_features[3];
1097         int             type_err;
1098         unsigned int    mask_err;
1099         errcode_t       err;
1100         enum quota_type qtype;
1101
1102 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1103                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1104 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1105                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1106 #define FEATURE_CHANGED(type, mask) ((mask) & \
1107                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1108
1109         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1110         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1111         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1112
1113         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1114                               ok_features, clear_ok_features,
1115                               &type_err, &mask_err)) {
1116                 if (!mask_err)
1117                         fprintf(stderr,
1118                                 _("Invalid filesystem option set: %s\n"),
1119                                 features);
1120                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1121                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1122                                           "not supported.\n"),
1123                                 e2p_feature2string(type_err &
1124                                                    E2P_FEATURE_TYPE_MASK,
1125                                                    mask_err));
1126                 else
1127                         fprintf(stderr, _("Setting filesystem feature '%s' "
1128                                           "not supported.\n"),
1129                                 e2p_feature2string(type_err, mask_err));
1130                 return 1;
1131         }
1132
1133         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1134                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1135                     !(mount_flags & EXT2_MF_READONLY)) {
1136                         fputs(_("The has_journal feature may only be "
1137                                 "cleared when the filesystem is\n"
1138                                 "unmounted or mounted "
1139                                 "read-only.\n"), stderr);
1140                         return 1;
1141                 }
1142                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1143                     f_flag < 2) {
1144                         fputs(_("The needs_recovery flag is set.  "
1145                                 "Please run e2fsck before clearing\n"
1146                                 "the has_journal flag.\n"), stderr);
1147                         return 1;
1148                 }
1149                 if (sb->s_journal_inum) {
1150                         if (remove_journal_inode(fs))
1151                                 return 1;
1152                 }
1153                 if (sb->s_journal_dev) {
1154                         if (remove_journal_device(fs))
1155                                 return 1;
1156                 }
1157         }
1158
1159         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1160                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1161                 if (ext2fs_has_feature_meta_bg(sb)) {
1162                         fputs(_("Setting filesystem feature 'sparse_super' "
1163                                 "not supported\nfor filesystems with "
1164                                 "the meta_bg feature enabled.\n"),
1165                                 stderr);
1166                         return 1;
1167                 }
1168         }
1169
1170         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1171                 int error;
1172
1173                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1174                     (mount_flags & EXT2_MF_READONLY)) {
1175                         fputs(_("The multiple mount protection feature can't\n"
1176                                 "be set if the filesystem is mounted or\n"
1177                                 "read-only.\n"), stderr);
1178                         return 1;
1179                 }
1180
1181                 error = ext2fs_mmp_init(fs);
1182                 if (error) {
1183                         fputs(_("\nError while enabling multiple mount "
1184                                 "protection feature."), stderr);
1185                         return 1;
1186                 }
1187
1188                 /*
1189                  * We want to update group desc with the new free blocks count
1190                  */
1191                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1192
1193                 printf(_("Multiple mount protection has been enabled "
1194                          "with update interval %ds.\n"),
1195                        sb->s_mmp_update_interval);
1196         }
1197
1198         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1199                 int error;
1200
1201                 if (mount_flags & EXT2_MF_READONLY) {
1202                         fputs(_("The multiple mount protection feature cannot\n"
1203                                 "be disabled if the filesystem is readonly.\n"),
1204                                 stderr);
1205                         return 1;
1206                 }
1207
1208                 error = ext2fs_read_bitmaps(fs);
1209                 if (error) {
1210                         fputs(_("Error while reading bitmaps\n"), stderr);
1211                         return 1;
1212                 }
1213
1214                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1215                 if (error) {
1216                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1217
1218                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1219                                 printf(_("Magic number in MMP block does not "
1220                                          "match. expected: %x, actual: %x\n"),
1221                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1222                         else
1223                                 com_err(program_name, error, "%s",
1224                                         _("while reading MMP block."));
1225                         goto mmp_error;
1226                 }
1227
1228                 /* We need to force out the group descriptors as well */
1229                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1230                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1231 mmp_error:
1232                 sb->s_mmp_block = 0;
1233                 sb->s_mmp_update_interval = 0;
1234         }
1235
1236         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1237                 /*
1238                  * If adding a journal flag, let the create journal
1239                  * code below handle setting the flag and creating the
1240                  * journal.  We supply a default size if necessary.
1241                  */
1242                 if (!journal_size)
1243                         journal_size = -1;
1244                 ext2fs_clear_feature_journal(sb);
1245         }
1246
1247         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1248                 if (!sb->s_def_hash_version)
1249                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1250                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1251                         uuid_generate((unsigned char *) sb->s_hash_seed);
1252         }
1253
1254         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1255                 if (ext2fs_check_desc(fs)) {
1256                         fputs(_("Clearing the flex_bg flag would "
1257                                 "cause the the filesystem to be\n"
1258                                 "inconsistent.\n"), stderr);
1259                         return 1;
1260                 }
1261         }
1262
1263         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1264                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1265                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1266                     !(mount_flags & EXT2_MF_READONLY)) {
1267                         fputs(_("The huge_file feature may only be "
1268                                 "cleared when the filesystem is\n"
1269                                 "unmounted or mounted "
1270                                 "read-only.\n"), stderr);
1271                         return 1;
1272                 }
1273         }
1274
1275         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1276                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1277                 check_fsck_needed(fs,
1278                         _("Enabling checksums could take some time."));
1279                 if (mount_flags & EXT2_MF_MOUNTED) {
1280                         fputs(_("Cannot enable metadata_csum on a mounted "
1281                                 "filesystem!\n"), stderr);
1282                         exit(1);
1283                 }
1284                 if (!ext2fs_has_feature_extents(fs->super))
1285                         printf("%s",
1286                                _("Extents are not enabled.  The file extent "
1287                                  "tree can be checksummed, whereas block maps "
1288                                  "cannot.  Not enabling extents reduces the "
1289                                  "coverage of metadata checksumming.  "
1290                                  "Re-run with -O extent to rectify.\n"));
1291                 if (!ext2fs_has_feature_64bit(fs->super))
1292                         printf("%s",
1293                                _("64-bit filesystem support is not enabled.  "
1294                                  "The larger fields afforded by this feature "
1295                                  "enable full-strength checksumming.  "
1296                                  "Run resize2fs -b to rectify.\n"));
1297                 rewrite_checksums = 1;
1298                 /* metadata_csum supersedes uninit_bg */
1299                 ext2fs_clear_feature_gdt_csum(fs->super);
1300
1301                 /* if uninit_bg was previously off, rewrite group desc */
1302                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1303                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1304                         enable_uninit_bg(fs);
1305
1306                 /*
1307                  * Since metadata_csum supersedes uninit_bg, pretend like
1308                  * uninit_bg has been off all along.
1309                  */
1310                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1311                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1312         }
1313
1314         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1315                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1316                 __u32   test_features[3];
1317
1318                 check_fsck_needed(fs,
1319                         _("Disabling checksums could take some time."));
1320                 if (mount_flags & EXT2_MF_MOUNTED) {
1321                         fputs(_("Cannot disable metadata_csum on a mounted "
1322                                 "filesystem!\n"), stderr);
1323                         exit(1);
1324                 }
1325                 rewrite_checksums = 1;
1326
1327                 /* Enable uninit_bg unless the user expressly turned it off */
1328                 memcpy(test_features, old_features, sizeof(test_features));
1329                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1330                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1331                 e2p_edit_feature2(features, test_features, ok_features,
1332                                   clear_ok_features, NULL, NULL);
1333                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1334                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1335                         ext2fs_set_feature_gdt_csum(fs->super);
1336
1337                 /*
1338                  * If we're turning off metadata_csum and not turning on
1339                  * uninit_bg, rewrite group desc.
1340                  */
1341                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1342                         err = disable_uninit_bg(fs,
1343                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1344                         if (err)
1345                                 return 1;
1346                 } else
1347                         /*
1348                          * metadata_csum previously provided uninit_bg, so if
1349                          * we're also setting the uninit_bg feature bit,
1350                          * pretend like it was previously enabled.  Checksums
1351                          * will be rewritten with crc16 later.
1352                          */
1353                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1354                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1355                 fs->super->s_checksum_seed = 0;
1356                 ext2fs_clear_feature_csum_seed(fs->super);
1357         }
1358
1359         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1360                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1361                 /* Do not enable uninit_bg when metadata_csum enabled */
1362                 if (ext2fs_has_feature_metadata_csum(fs->super))
1363                         ext2fs_clear_feature_gdt_csum(fs->super);
1364                 else
1365                         enable_uninit_bg(fs);
1366         }
1367
1368         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1369                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1370                 err = disable_uninit_bg(fs,
1371                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1372                 if (err)
1373                         return 1;
1374         }
1375
1376         /*
1377          * We don't actually toggle 64bit; resize2fs does that.  But this
1378          * must come after the metadata_csum feature_on so that it won't
1379          * complain about the lack of 64bit.
1380          */
1381         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1382                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1383                 if (mount_flags & EXT2_MF_MOUNTED) {
1384                         fprintf(stderr, _("Cannot enable 64-bit mode "
1385                                           "while mounted!\n"));
1386                         exit(1);
1387                 }
1388                 ext2fs_clear_feature_64bit(sb);
1389                 feature_64bit = 1;
1390         }
1391         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1392                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1393                 if (mount_flags & EXT2_MF_MOUNTED) {
1394                         fprintf(stderr, _("Cannot disable 64-bit mode "
1395                                           "while mounted!\n"));
1396                         exit(1);
1397                 }
1398                 ext2fs_set_feature_64bit(sb);
1399                 feature_64bit = -1;
1400         }
1401
1402         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1403                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1404                 /*
1405                  * Set the Q_flag here and handle the quota options in the code
1406                  * below.
1407                  */
1408                 if (!Q_flag) {
1409                         Q_flag = 1;
1410                         /* Enable usr/grp quota by default */
1411                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1412                                 if (qtype != PRJQUOTA)
1413                                         quota_enable[qtype] = QOPT_ENABLE;
1414                                 else
1415                                         quota_enable[qtype] = QOPT_DISABLE;
1416                         }
1417                 }
1418                 ext2fs_clear_feature_quota(sb);
1419         }
1420
1421         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1422                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1423                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1424                         fprintf(stderr, _("Cannot enable project feature; "
1425                                           "inode size too small.\n"));
1426                         exit(1);
1427                 }
1428                 Q_flag = 1;
1429                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1430         }
1431
1432         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1433                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1434                 Q_flag = 1;
1435                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1436         }
1437
1438         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1439                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1440                 /*
1441                  * Set the Q_flag here and handle the quota options in the code
1442                  * below.
1443                  */
1444                 if (Q_flag)
1445                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1446                                 "arguments.\n"), stderr);
1447                 Q_flag = 1;
1448                 /* Disable all quota by default */
1449                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1450                         quota_enable[qtype] = QOPT_DISABLE;
1451         }
1452
1453         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1454                 fs->super->s_encrypt_algos[0] =
1455                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1456                 fs->super->s_encrypt_algos[1] =
1457                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1458         }
1459
1460         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1461                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1462                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1463                         fputs(_("Setting feature 'metadata_csum_seed' "
1464                                 "is only supported\non filesystems with "
1465                                 "the metadata_csum feature enabled.\n"),
1466                                 stderr);
1467                         return 1;
1468                 }
1469                 try_confirm_csum_seed_support();
1470                 fs->super->s_checksum_seed = fs->csum_seed;
1471         }
1472
1473         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1474                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1475                 __le32 uuid_seed;
1476
1477                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1478                                         sizeof(fs->super->s_uuid));
1479                 if (fs->super->s_checksum_seed != uuid_seed &&
1480                     (mount_flags & EXT2_MF_MOUNTED)) {
1481                         fputs(_("UUID has changed since enabling "
1482                                 "metadata_csum.  Filesystem must be unmounted "
1483                                 "\nto safely rewrite all metadata to "
1484                                 "match the new UUID.\n"), stderr);
1485                         return 1;
1486                 }
1487
1488                 rewrite_checksums = 1;
1489         }
1490
1491         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1492             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1493              sb->s_feature_incompat))
1494                 ext2fs_update_dynamic_rev(fs);
1495
1496         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1497                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1498             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1499                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1500             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1501                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1502             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1503                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1504             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1505                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1506                 request_fsck_afterwards(fs);
1507
1508         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1509             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1510             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1511                 ext2fs_mark_super_dirty(fs);
1512
1513         return 0;
1514 }
1515
1516 /*
1517  * Add a journal to the filesystem.
1518  */
1519 static int add_journal(ext2_filsys fs)
1520 {
1521         unsigned long journal_blocks;
1522         errcode_t       retval;
1523         ext2_filsys     jfs;
1524         io_manager      io_ptr;
1525
1526         if (ext2fs_has_feature_journal(fs->super)) {
1527                 fputs(_("The filesystem already has a journal.\n"), stderr);
1528                 goto err;
1529         }
1530         if (journal_device) {
1531                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1532                                         NULL))
1533                         proceed_question(-1);
1534                 check_mount(journal_device, 0, _("journal"));
1535 #ifdef CONFIG_TESTIO_DEBUG
1536                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1537                         io_ptr = test_io_manager;
1538                         test_io_backing_manager = unix_io_manager;
1539                 } else
1540 #endif
1541                         io_ptr = unix_io_manager;
1542                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1543                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1544                                      fs->blocksize, io_ptr, &jfs);
1545                 if (retval) {
1546                         com_err(program_name, retval,
1547                                 _("\n\twhile trying to open journal on %s\n"),
1548                                 journal_device);
1549                         goto err;
1550                 }
1551                 printf(_("Creating journal on device %s: "),
1552                        journal_device);
1553                 fflush(stdout);
1554
1555                 retval = ext2fs_add_journal_device(fs, jfs);
1556                 ext2fs_close_free(&jfs);
1557                 if (retval) {
1558                         com_err(program_name, retval,
1559                                 _("while adding filesystem to journal on %s"),
1560                                 journal_device);
1561                         goto err;
1562                 }
1563                 fputs(_("done\n"), stdout);
1564         } else if (journal_size) {
1565                 fputs(_("Creating journal inode: "), stdout);
1566                 fflush(stdout);
1567                 journal_blocks = figure_journal_size(journal_size, fs);
1568
1569                 if (journal_location_string)
1570                         journal_location =
1571                                 parse_num_blocks2(journal_location_string,
1572                                                   fs->super->s_log_block_size);
1573                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1574                                                    journal_location,
1575                                                    journal_flags);
1576                 if (retval) {
1577                         fprintf(stderr, "\n");
1578                         com_err(program_name, retval, "%s",
1579                                 _("\n\twhile trying to create journal file"));
1580                         return retval;
1581                 } else
1582                         fputs(_("done\n"), stdout);
1583                 /*
1584                  * If the filesystem wasn't mounted, we need to force
1585                  * the block group descriptors out.
1586                  */
1587                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1588                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1589         }
1590         print_check_message(fs->super->s_max_mnt_count,
1591                             fs->super->s_checkinterval);
1592         return 0;
1593
1594 err:
1595         free(journal_device);
1596         return 1;
1597 }
1598
1599 static void handle_quota_options(ext2_filsys fs)
1600 {
1601         errcode_t retval;
1602         quota_ctx_t qctx;
1603         ext2_ino_t qf_ino;
1604         enum quota_type qtype;
1605         unsigned int qtype_bits = 0;
1606         int need_dirty = 0;
1607
1608         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1609                 if (quota_enable[qtype] != 0)
1610                         break;
1611         if (qtype == MAXQUOTAS)
1612                 /* Nothing to do. */
1613                 return;
1614
1615         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1616             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1617                 fprintf(stderr, _("Cannot enable project quota; "
1618                                   "inode size too small.\n"));
1619                 exit(1);
1620         }
1621
1622         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1623                 if (quota_enable[qtype] == QOPT_ENABLE)
1624                         qtype_bits |= 1 << qtype;
1625         }
1626
1627         retval = quota_init_context(&qctx, fs, qtype_bits);
1628         if (retval) {
1629                 com_err(program_name, retval,
1630                         _("while initializing quota context in support library"));
1631                 exit(1);
1632         }
1633
1634         if (qtype_bits)
1635                 quota_compute_usage(qctx);
1636
1637         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1638                 if (quota_enable[qtype] == QOPT_ENABLE &&
1639                     *quota_sb_inump(fs->super, qtype) == 0) {
1640                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1641                                 retval = quota_update_limits(qctx, qf_ino,
1642                                                              qtype);
1643                                 if (retval) {
1644                                         com_err(program_name, retval,
1645                                                 _("while updating quota limits (%d)"),
1646                                                 qtype);
1647                                         exit(1);
1648                                 }
1649                         }
1650                         retval = quota_write_inode(qctx, 1 << qtype);
1651                         if (retval) {
1652                                 com_err(program_name, retval,
1653                                         _("while writing quota file (%d)"),
1654                                         qtype);
1655                                 exit(1);
1656                         }
1657                         /* Enable Quota feature if one of quota enabled */
1658                         if (!ext2fs_has_feature_quota(fs->super)) {
1659                                 ext2fs_set_feature_quota(fs->super);
1660                                 need_dirty = 1;
1661                         }
1662                         if (qtype == PRJQUOTA &&
1663                             !ext2fs_has_feature_project(fs->super)) {
1664                                 ext2fs_set_feature_project(fs->super);
1665                                 need_dirty = 1;
1666                         }
1667                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1668                         retval = quota_remove_inode(fs, qtype);
1669                         if (retval) {
1670                                 com_err(program_name, retval,
1671                                         _("while removing quota file (%d)"),
1672                                         qtype);
1673                                 exit(1);
1674                         }
1675                         if (qtype == PRJQUOTA) {
1676                                 ext2fs_clear_feature_project(fs->super);
1677                                 need_dirty = 1;
1678                         }
1679                 }
1680         }
1681
1682         quota_release_context(&qctx);
1683         /* Clear Quota feature if all quota types disabled. */
1684         if (!qtype_bits) {
1685                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1686                         if (*quota_sb_inump(fs->super, qtype))
1687                                 break;
1688                 if (qtype == MAXQUOTAS) {
1689                         ext2fs_clear_feature_quota(fs->super);
1690                         need_dirty = 1;
1691                 }
1692
1693         }
1694         if (need_dirty)
1695                 ext2fs_mark_super_dirty(fs);
1696         return;
1697 }
1698
1699 static int option_handle_function(char *token)
1700 {
1701         if (strncmp(token, "usr", 3) == 0) {
1702                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1703         } else if (strncmp(token, "^usr", 4) == 0) {
1704                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1705         } else if (strncmp(token, "grp", 3) == 0) {
1706                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1707         } else if (strncmp(token, "^grp", 4) == 0) {
1708                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1709         } else if (strncmp(token, "prj", 3) == 0) {
1710                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1711         } else if (strncmp(token, "^prj", 4) == 0) {
1712                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1713         } else {
1714                 fputs(_("\nBad quota options specified.\n\n"
1715                         "Following valid quota options are available "
1716                         "(pass by separating with comma):\n"
1717                         "\t[^]usr[quota]\n"
1718                         "\t[^]grp[quota]\n"
1719                         "\t[^]prj[quota]\n"
1720                         "\n\n"), stderr);
1721                 return 1;
1722         }
1723         return 0;
1724 }
1725
1726 static void parse_e2label_options(int argc, char ** argv)
1727 {
1728         if ((argc < 2) || (argc > 3)) {
1729                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1730                 exit(1);
1731         }
1732         io_options = strchr(argv[1], '?');
1733         if (io_options)
1734                 *io_options++ = 0;
1735         device_name = blkid_get_devname(NULL, argv[1], NULL);
1736         if (!device_name) {
1737                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1738                         argv[1]);
1739                 exit(1);
1740         }
1741         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1742         if (argc == 3) {
1743                 open_flag |= EXT2_FLAG_RW;
1744                 L_flag = 1;
1745                 new_label = argv[2];
1746         } else
1747                 print_label++;
1748 }
1749
1750 static time_t parse_time(char *str)
1751 {
1752         struct  tm      ts;
1753
1754         if (strcmp(str, "now") == 0) {
1755                 return (time(0));
1756         }
1757         memset(&ts, 0, sizeof(ts));
1758 #ifdef HAVE_STRPTIME
1759         strptime(str, "%Y%m%d%H%M%S", &ts);
1760 #else
1761         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1762                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1763         ts.tm_year -= 1900;
1764         ts.tm_mon -= 1;
1765         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1766             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1767             ts.tm_min > 59 || ts.tm_sec > 61)
1768                 ts.tm_mday = 0;
1769 #endif
1770         if (ts.tm_mday == 0) {
1771                 com_err(program_name, 0,
1772                         _("Couldn't parse date/time specifier: %s"),
1773                         str);
1774                 usage();
1775         }
1776         ts.tm_isdst = -1;
1777         return (mktime(&ts));
1778 }
1779
1780 static void parse_tune2fs_options(int argc, char **argv)
1781 {
1782         int c;
1783         char *tmp;
1784         struct group *gr;
1785         struct passwd *pw;
1786         int ret;
1787         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1788
1789         open_flag = 0;
1790         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1791         while ((c = getopt(argc, argv, optstring)) != EOF)
1792                 switch (c) {
1793                 case 'c':
1794                         max_mount_count = strtol(optarg, &tmp, 0);
1795                         if (*tmp || max_mount_count > 16000) {
1796                                 com_err(program_name, 0,
1797                                         _("bad mounts count - %s"),
1798                                         optarg);
1799                                 usage();
1800                         }
1801                         if (max_mount_count == 0)
1802                                 max_mount_count = -1;
1803                         c_flag = 1;
1804                         open_flag = EXT2_FLAG_RW;
1805                         break;
1806                 case 'C':
1807                         mount_count = strtoul(optarg, &tmp, 0);
1808                         if (*tmp || mount_count > 16000) {
1809                                 com_err(program_name, 0,
1810                                         _("bad mounts count - %s"),
1811                                         optarg);
1812                                 usage();
1813                         }
1814                         C_flag = 1;
1815                         open_flag = EXT2_FLAG_RW;
1816                         break;
1817                 case 'e':
1818                         if (strcmp(optarg, "continue") == 0)
1819                                 errors = EXT2_ERRORS_CONTINUE;
1820                         else if (strcmp(optarg, "remount-ro") == 0)
1821                                 errors = EXT2_ERRORS_RO;
1822                         else if (strcmp(optarg, "panic") == 0)
1823                                 errors = EXT2_ERRORS_PANIC;
1824                         else {
1825                                 com_err(program_name, 0,
1826                                         _("bad error behavior - %s"),
1827                                         optarg);
1828                                 usage();
1829                         }
1830                         e_flag = 1;
1831                         open_flag = EXT2_FLAG_RW;
1832                         break;
1833                 case 'E':
1834                         extended_cmd = optarg;
1835                         open_flag |= EXT2_FLAG_RW;
1836                         break;
1837                 case 'f': /* Force */
1838                         f_flag++;
1839                         break;
1840                 case 'g':
1841                         resgid = strtoul(optarg, &tmp, 0);
1842                         if (*tmp) {
1843                                 gr = getgrnam(optarg);
1844                                 if (gr == NULL)
1845                                         tmp = optarg;
1846                                 else {
1847                                         resgid = gr->gr_gid;
1848                                         *tmp = 0;
1849                                 }
1850                         }
1851                         if (*tmp) {
1852                                 com_err(program_name, 0,
1853                                         _("bad gid/group name - %s"),
1854                                         optarg);
1855                                 usage();
1856                         }
1857                         g_flag = 1;
1858                         open_flag = EXT2_FLAG_RW;
1859                         break;
1860                 case 'i':
1861                         interval = strtoul(optarg, &tmp, 0);
1862                         switch (*tmp) {
1863                         case 's':
1864                                 tmp++;
1865                                 break;
1866                         case '\0':
1867                         case 'd':
1868                         case 'D': /* days */
1869                                 interval *= 86400;
1870                                 if (*tmp != '\0')
1871                                         tmp++;
1872                                 break;
1873                         case 'm':
1874                         case 'M': /* months! */
1875                                 interval *= 86400 * 30;
1876                                 tmp++;
1877                                 break;
1878                         case 'w':
1879                         case 'W': /* weeks */
1880                                 interval *= 86400 * 7;
1881                                 tmp++;
1882                                 break;
1883                         }
1884                         if (*tmp) {
1885                                 com_err(program_name, 0,
1886                                         _("bad interval - %s"), optarg);
1887                                 usage();
1888                         }
1889                         i_flag = 1;
1890                         open_flag = EXT2_FLAG_RW;
1891                         break;
1892                 case 'j':
1893                         if (!journal_size)
1894                                 journal_size = -1;
1895                         open_flag = EXT2_FLAG_RW;
1896                         break;
1897                 case 'J':
1898                         parse_journal_opts(optarg);
1899                         open_flag = EXT2_FLAG_RW;
1900                         break;
1901                 case 'l':
1902                         l_flag = 1;
1903                         break;
1904                 case 'L':
1905                         new_label = optarg;
1906                         L_flag = 1;
1907                         open_flag |= EXT2_FLAG_RW |
1908                                 EXT2_FLAG_JOURNAL_DEV_OK;
1909                         break;
1910                 case 'm':
1911                         reserved_ratio = strtod(optarg, &tmp);
1912                         if (*tmp || reserved_ratio > 50 ||
1913                             reserved_ratio < 0) {
1914                                 com_err(program_name, 0,
1915                                         _("bad reserved block ratio - %s"),
1916                                         optarg);
1917                                 usage();
1918                         }
1919                         m_flag = 1;
1920                         open_flag = EXT2_FLAG_RW;
1921                         break;
1922                 case 'M':
1923                         new_last_mounted = optarg;
1924                         M_flag = 1;
1925                         open_flag = EXT2_FLAG_RW;
1926                         break;
1927                 case 'o':
1928                         if (mntopts_cmd) {
1929                                 com_err(program_name, 0, "%s",
1930                                         _("-o may only be specified once"));
1931                                 usage();
1932                         }
1933                         mntopts_cmd = optarg;
1934                         open_flag = EXT2_FLAG_RW;
1935                         break;
1936                 case 'O':
1937                         if (features_cmd) {
1938                                 com_err(program_name, 0, "%s",
1939                                         _("-O may only be specified once"));
1940                                 usage();
1941                         }
1942                         features_cmd = optarg;
1943                         open_flag = EXT2_FLAG_RW;
1944                         break;
1945                 case 'Q':
1946                         Q_flag = 1;
1947                         ret = parse_quota_opts(optarg, option_handle_function);
1948                         if (ret)
1949                                 exit(1);
1950                         open_flag = EXT2_FLAG_RW;
1951                         break;
1952                 case 'r':
1953                         reserved_blocks = strtoul(optarg, &tmp, 0);
1954                         if (*tmp) {
1955                                 com_err(program_name, 0,
1956                                         _("bad reserved blocks count - %s"),
1957                                         optarg);
1958                                 usage();
1959                         }
1960                         r_flag = 1;
1961                         open_flag = EXT2_FLAG_RW;
1962                         break;
1963                 case 's': /* Deprecated */
1964                         s_flag = atoi(optarg);
1965                         open_flag = EXT2_FLAG_RW;
1966                         break;
1967                 case 'T':
1968                         T_flag = 1;
1969                         last_check_time = parse_time(optarg);
1970                         open_flag = EXT2_FLAG_RW;
1971                         break;
1972                 case 'u':
1973                                 resuid = strtoul(optarg, &tmp, 0);
1974                                 if (*tmp) {
1975                                         pw = getpwnam(optarg);
1976                                         if (pw == NULL)
1977                                                 tmp = optarg;
1978                                         else {
1979                                                 resuid = pw->pw_uid;
1980                                                 *tmp = 0;
1981                                         }
1982                                 }
1983                                 if (*tmp) {
1984                                         com_err(program_name, 0,
1985                                                 _("bad uid/user name - %s"),
1986                                                 optarg);
1987                                         usage();
1988                                 }
1989                                 u_flag = 1;
1990                                 open_flag = EXT2_FLAG_RW;
1991                                 break;
1992                 case 'U':
1993                         new_UUID = optarg;
1994                         U_flag = 1;
1995                         open_flag = EXT2_FLAG_RW |
1996                                 EXT2_FLAG_JOURNAL_DEV_OK;
1997                         break;
1998                 case 'I':
1999                         new_inode_size = strtoul(optarg, &tmp, 0);
2000                         if (*tmp) {
2001                                 com_err(program_name, 0,
2002                                         _("bad inode size - %s"),
2003                                         optarg);
2004                                 usage();
2005                         }
2006                         if (!((new_inode_size &
2007                                (new_inode_size - 1)) == 0)) {
2008                                 com_err(program_name, 0,
2009                                         _("Inode size must be a "
2010                                           "power of two- %s"),
2011                                         optarg);
2012                                 usage();
2013                         }
2014                         open_flag = EXT2_FLAG_RW;
2015                         I_flag = 1;
2016                         break;
2017                 case 'z':
2018                         undo_file = optarg;
2019                         break;
2020                 default:
2021                         usage();
2022                 }
2023         if (optind < argc - 1 || optind == argc)
2024                 usage();
2025         if (!open_flag && !l_flag)
2026                 usage();
2027         io_options = strchr(argv[optind], '?');
2028         if (io_options)
2029                 *io_options++ = 0;
2030         device_name = blkid_get_devname(NULL, argv[optind], NULL);
2031         if (!device_name) {
2032                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2033                         argv[optind]);
2034                 exit(1);
2035         }
2036 }
2037
2038 #ifdef CONFIG_BUILD_FINDFS
2039 void do_findfs(int argc, char **argv)
2040 {
2041         char    *dev;
2042
2043         if ((argc != 2) ||
2044             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2045                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2046                 exit(2);
2047         }
2048         dev = blkid_get_devname(NULL, argv[1], NULL);
2049         if (!dev) {
2050                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2051                         argv[1]);
2052                 exit(1);
2053         }
2054         puts(dev);
2055         exit(0);
2056 }
2057 #endif
2058
2059 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2060 {
2061         char    *buf, *token, *next, *p, *arg;
2062         int     len, hash_alg;
2063         int     r_usage = 0;
2064
2065         len = strlen(opts);
2066         buf = malloc(len+1);
2067         if (!buf) {
2068                 fprintf(stderr, "%s",
2069                         _("Couldn't allocate memory to parse options!\n"));
2070                 return 1;
2071         }
2072         strcpy(buf, opts);
2073         for (token = buf; token && *token; token = next) {
2074                 p = strchr(token, ',');
2075                 next = 0;
2076                 if (p) {
2077                         *p = 0;
2078                         next = p+1;
2079                 }
2080                 arg = strchr(token, '=');
2081                 if (arg) {
2082                         *arg = 0;
2083                         arg++;
2084                 }
2085                 if (strcmp(token, "clear-mmp") == 0 ||
2086                     strcmp(token, "clear_mmp") == 0) {
2087                         clear_mmp = 1;
2088                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2089                         unsigned long intv;
2090                         if (!arg) {
2091                                 r_usage++;
2092                                 continue;
2093                         }
2094                         intv = strtoul(arg, &p, 0);
2095                         if (*p) {
2096                                 fprintf(stderr,
2097                                         _("Invalid mmp_update_interval: %s\n"),
2098                                         arg);
2099                                 r_usage++;
2100                                 continue;
2101                         }
2102                         if (intv == 0) {
2103                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2104                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2105                                 fprintf(stderr,
2106                                         _("mmp_update_interval too big: %lu\n"),
2107                                         intv);
2108                                 r_usage++;
2109                                 continue;
2110                         }
2111                         printf(P_("Setting multiple mount protection update "
2112                                   "interval to %lu second\n",
2113                                   "Setting multiple mount protection update "
2114                                   "interval to %lu seconds\n", intv),
2115                                intv);
2116                         fs->super->s_mmp_update_interval = intv;
2117                         ext2fs_mark_super_dirty(fs);
2118                 } else if (!strcmp(token, "test_fs")) {
2119                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2120                         printf("Setting test filesystem flag\n");
2121                         ext2fs_mark_super_dirty(fs);
2122                 } else if (!strcmp(token, "^test_fs")) {
2123                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2124                         printf("Clearing test filesystem flag\n");
2125                         ext2fs_mark_super_dirty(fs);
2126                 } else if (strcmp(token, "stride") == 0) {
2127                         if (!arg) {
2128                                 r_usage++;
2129                                 continue;
2130                         }
2131                         stride = strtoul(arg, &p, 0);
2132                         if (*p) {
2133                                 fprintf(stderr,
2134                                         _("Invalid RAID stride: %s\n"),
2135                                         arg);
2136                                 r_usage++;
2137                                 continue;
2138                         }
2139                         stride_set = 1;
2140                 } else if (strcmp(token, "stripe-width") == 0 ||
2141                            strcmp(token, "stripe_width") == 0) {
2142                         if (!arg) {
2143                                 r_usage++;
2144                                 continue;
2145                         }
2146                         stripe_width = strtoul(arg, &p, 0);
2147                         if (*p) {
2148                                 fprintf(stderr,
2149                                         _("Invalid RAID stripe-width: %s\n"),
2150                                         arg);
2151                                 r_usage++;
2152                                 continue;
2153                         }
2154                         stripe_width_set = 1;
2155                 } else if (strcmp(token, "hash_alg") == 0 ||
2156                            strcmp(token, "hash-alg") == 0) {
2157                         if (!arg) {
2158                                 r_usage++;
2159                                 continue;
2160                         }
2161                         hash_alg = e2p_string2hash(arg);
2162                         if (hash_alg < 0) {
2163                                 fprintf(stderr,
2164                                         _("Invalid hash algorithm: %s\n"),
2165                                         arg);
2166                                 r_usage++;
2167                                 continue;
2168                         }
2169                         fs->super->s_def_hash_version = hash_alg;
2170                         printf(_("Setting default hash algorithm "
2171                                  "to %s (%d)\n"),
2172                                arg, hash_alg);
2173                         ext2fs_mark_super_dirty(fs);
2174                 } else if (!strcmp(token, "mount_opts")) {
2175                         if (!arg) {
2176                                 r_usage++;
2177                                 continue;
2178                         }
2179                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2180                                 fprintf(stderr,
2181                                         "Extended mount options too long\n");
2182                                 continue;
2183                         }
2184                         ext_mount_opts = strdup(arg);
2185                 } else
2186                         r_usage++;
2187         }
2188         if (r_usage) {
2189                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2190                         "Extended options are separated by commas, "
2191                         "and may take an argument which\n"
2192                         "\tis set off by an equals ('=') sign.\n\n"
2193                         "Valid extended options are:\n"
2194                         "\tclear_mmp\n"
2195                         "\thash_alg=<hash algorithm>\n"
2196                         "\tmount_opts=<extended default mount options>\n"
2197                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2198                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2199                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2200                         "\ttest_fs\n"
2201                         "\t^test_fs\n"));
2202                 free(buf);
2203                 return 1;
2204         }
2205         free(buf);
2206
2207         return 0;
2208 }
2209
2210 /*
2211  * Fill in the block bitmap bmap with the information regarding the
2212  * blocks to be moved
2213  */
2214 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2215                             ext2fs_block_bitmap bmap)
2216 {
2217         dgrp_t i;
2218         int retval;
2219         ext2_badblocks_list bb_list = 0;
2220         blk64_t j, needed_blocks = 0;
2221         blk64_t start_blk, end_blk;
2222
2223         retval = ext2fs_read_bb_inode(fs, &bb_list);
2224         if (retval)
2225                 return retval;
2226
2227         for (i = 0; i < fs->group_desc_count; i++) {
2228                 start_blk = ext2fs_inode_table_loc(fs, i) +
2229                                         fs->inode_blocks_per_group;
2230
2231                 end_blk = ext2fs_inode_table_loc(fs, i) +
2232                                         new_ino_blks_per_grp;
2233
2234                 for (j = start_blk; j < end_blk; j++) {
2235                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2236                                 /*
2237                                  * IF the block is a bad block we fail
2238                                  */
2239                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2240                                         ext2fs_badblocks_list_free(bb_list);
2241                                         return ENOSPC;
2242                                 }
2243
2244                                 ext2fs_mark_block_bitmap2(bmap, j);
2245                         } else {
2246                                 /*
2247                                  * We are going to use this block for
2248                                  * inode table. So mark them used.
2249                                  */
2250                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2251                         }
2252                 }
2253                 needed_blocks += end_blk - start_blk;
2254         }
2255
2256         ext2fs_badblocks_list_free(bb_list);
2257         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2258                 return ENOSPC;
2259
2260         return 0;
2261 }
2262
2263 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2264 {
2265         dgrp_t group;
2266         group = ext2fs_group_of_blk2(fs, blk);
2267         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2268                 return 1;
2269         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2270                 return 1;
2271         return 0;
2272 }
2273
2274 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2275 {
2276         blk64_t start_blk, end_blk;
2277         start_blk = fs->super->s_first_data_block +
2278                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2279         /*
2280          * We cannot get new block beyond end_blk for for the last block group
2281          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2282          */
2283         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2284         if (blk >= start_blk && blk <= end_blk)
2285                 return 1;
2286         return 0;
2287 }
2288
2289 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2290 {
2291
2292         char *buf;
2293         dgrp_t group = 0;
2294         errcode_t retval;
2295         int meta_data = 0;
2296         blk64_t blk, new_blk, goal;
2297         struct blk_move *bmv;
2298
2299         retval = ext2fs_get_mem(fs->blocksize, &buf);
2300         if (retval)
2301                 return retval;
2302
2303         for (new_blk = blk = fs->super->s_first_data_block;
2304              blk < ext2fs_blocks_count(fs->super); blk++) {
2305                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2306                         continue;
2307
2308                 if (ext2fs_is_meta_block(fs, blk)) {
2309                         /*
2310                          * If the block is mapping a fs meta data block
2311                          * like group desc/block bitmap/inode bitmap. We
2312                          * should find a block in the same group and fix
2313                          * the respective fs metadata pointers. Otherwise
2314                          * fail
2315                          */
2316                         group = ext2fs_group_of_blk2(fs, blk);
2317                         goal = ext2fs_group_first_block2(fs, group);
2318                         meta_data = 1;
2319
2320                 } else {
2321                         goal = new_blk;
2322                 }
2323                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2324                 if (retval)
2325                         goto err_out;
2326
2327                 /* new fs meta data block should be in the same group */
2328                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2329                         retval = ENOSPC;
2330                         goto err_out;
2331                 }
2332
2333                 /* Mark this block as allocated */
2334                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2335
2336                 /* Add it to block move list */
2337                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2338                 if (retval)
2339                         goto err_out;
2340
2341                 bmv->old_loc = blk;
2342                 bmv->new_loc = new_blk;
2343
2344                 list_add(&(bmv->list), &blk_move_list);
2345
2346                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2347                 if (retval)
2348                         goto err_out;
2349
2350                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2351                 if (retval)
2352                         goto err_out;
2353         }
2354
2355 err_out:
2356         ext2fs_free_mem(&buf);
2357         return retval;
2358 }
2359
2360 static blk64_t translate_block(blk64_t blk)
2361 {
2362         struct list_head *entry;
2363         struct blk_move *bmv;
2364
2365         list_for_each(entry, &blk_move_list) {
2366                 bmv = list_entry(entry, struct blk_move, list);
2367                 if (bmv->old_loc == blk)
2368                         return bmv->new_loc;
2369         }
2370
2371         return 0;
2372 }
2373
2374 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2375                          blk64_t *block_nr,
2376                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2377                          blk64_t ref_block EXT2FS_ATTR((unused)),
2378                          int ref_offset EXT2FS_ATTR((unused)),
2379                          void *priv_data)
2380 {
2381         int ret = 0;
2382         blk64_t new_blk;
2383         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2384
2385         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2386                 return 0;
2387         new_blk = translate_block(*block_nr);
2388         if (new_blk) {
2389                 *block_nr = new_blk;
2390                 /*
2391                  * This will force the ext2fs_write_inode in the iterator
2392                  */
2393                 ret |= BLOCK_CHANGED;
2394         }
2395
2396         return ret;
2397 }
2398
2399 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2400 {
2401         errcode_t retval = 0;
2402         ext2_ino_t ino;
2403         blk64_t blk;
2404         char *block_buf = 0;
2405         struct ext2_inode inode;
2406         ext2_inode_scan scan = NULL;
2407
2408         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2409         if (retval)
2410                 return retval;
2411
2412         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2413         if (retval)
2414                 goto err_out;
2415
2416         while (1) {
2417                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2418                 if (retval)
2419                         goto err_out;
2420
2421                 if (!ino)
2422                         break;
2423
2424                 if (inode.i_links_count == 0)
2425                         continue; /* inode not in use */
2426
2427                 /* FIXME!!
2428                  * If we end up modifying the journal inode
2429                  * the sb->s_jnl_blocks will differ. But a
2430                  * subsequent e2fsck fixes that.
2431                  * Do we need to fix this ??
2432                  */
2433
2434                 if (ext2fs_file_acl_block(fs, &inode) &&
2435                     ext2fs_test_block_bitmap2(bmap,
2436                                         ext2fs_file_acl_block(fs, &inode))) {
2437                         blk = translate_block(ext2fs_file_acl_block(fs,
2438                                                                     &inode));
2439                         if (!blk)
2440                                 continue;
2441
2442                         ext2fs_file_acl_block_set(fs, &inode, blk);
2443
2444                         /*
2445                          * Write the inode to disk so that inode table
2446                          * resizing can work
2447                          */
2448                         retval = ext2fs_write_inode(fs, ino, &inode);
2449                         if (retval)
2450                                 goto err_out;
2451                 }
2452
2453                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2454                         continue;
2455
2456                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2457                                                process_block, bmap);
2458                 if (retval)
2459                         goto err_out;
2460
2461         }
2462
2463 err_out:
2464         ext2fs_free_mem(&block_buf);
2465         ext2fs_close_inode_scan(scan);
2466
2467         return retval;
2468 }
2469
2470 /*
2471  * We need to scan for inode and block bitmaps that may need to be
2472  * moved.  This can take place if the filesystem was formatted for
2473  * RAID arrays using the mke2fs's extended option "stride".
2474  */
2475 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2476 {
2477         dgrp_t i;
2478         blk64_t blk, new_blk;
2479
2480         for (i = 0; i < fs->group_desc_count; i++) {
2481                 blk = ext2fs_block_bitmap_loc(fs, i);
2482                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2483                         new_blk = translate_block(blk);
2484                         if (!new_blk)
2485                                 continue;
2486                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2487                 }
2488
2489                 blk = ext2fs_inode_bitmap_loc(fs, i);
2490                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2491                         new_blk = translate_block(blk);
2492                         if (!new_blk)
2493                                 continue;
2494                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2495                 }
2496         }
2497         return 0;
2498 }
2499
2500 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2501 {
2502         dgrp_t i;
2503         blk64_t blk;
2504         errcode_t retval;
2505         int new_ino_blks_per_grp;
2506         unsigned int j;
2507         char *old_itable = NULL, *new_itable = NULL;
2508         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2509         unsigned long old_ino_size;
2510         int old_itable_size, new_itable_size;
2511
2512         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2513         old_ino_size = EXT2_INODE_SIZE(fs->super);
2514
2515         new_ino_blks_per_grp = ext2fs_div_ceil(
2516                                         EXT2_INODES_PER_GROUP(fs->super) *
2517                                         new_ino_size,
2518                                         fs->blocksize);
2519
2520         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2521
2522         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2523         if (retval)
2524                 return retval;
2525
2526         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2527         if (retval)
2528                 goto err_out;
2529
2530         tmp_old_itable = old_itable;
2531         tmp_new_itable = new_itable;
2532
2533         for (i = 0; i < fs->group_desc_count; i++) {
2534                 blk = ext2fs_inode_table_loc(fs, i);
2535                 retval = io_channel_read_blk64(fs->io, blk,
2536                                 fs->inode_blocks_per_group, old_itable);
2537                 if (retval)
2538                         goto err_out;
2539
2540                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2541                         memcpy(new_itable, old_itable, old_ino_size);
2542
2543                         memset(new_itable+old_ino_size, 0,
2544                                         new_ino_size - old_ino_size);
2545
2546                         new_itable += new_ino_size;
2547                         old_itable += old_ino_size;
2548                 }
2549
2550                 /* reset the pointer */
2551                 old_itable = tmp_old_itable;
2552                 new_itable = tmp_new_itable;
2553
2554                 retval = io_channel_write_blk64(fs->io, blk,
2555                                         new_ino_blks_per_grp, new_itable);
2556                 if (retval)
2557                         goto err_out;
2558         }
2559
2560         /* Update the meta data */
2561         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2562         ext2fs_free_inode_cache(fs->icache);
2563         fs->icache = 0;
2564         fs->super->s_inode_size = new_ino_size;
2565
2566 err_out:
2567         if (old_itable)
2568                 ext2fs_free_mem(&old_itable);
2569
2570         if (new_itable)
2571                 ext2fs_free_mem(&new_itable);
2572
2573         return retval;
2574 }
2575
2576 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2577 {
2578         blk64_t         blk;
2579         ext2_ino_t      ino;
2580         unsigned int    group = 0;
2581         unsigned int    count = 0;
2582         int             total_free = 0;
2583         int             group_free = 0;
2584
2585         /*
2586          * First calculate the block statistics
2587          */
2588         for (blk = fs->super->s_first_data_block;
2589              blk < ext2fs_blocks_count(fs->super); blk++) {
2590                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2591                         group_free++;
2592                         total_free++;
2593                 }
2594                 count++;
2595                 if ((count == fs->super->s_blocks_per_group) ||
2596                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2597                         ext2fs_bg_free_blocks_count_set(fs, group++,
2598                                                         group_free);
2599                         count = 0;
2600                         group_free = 0;
2601                 }
2602         }
2603         total_free = EXT2FS_C2B(fs, total_free);
2604         ext2fs_free_blocks_count_set(fs->super, total_free);
2605
2606         /*
2607          * Next, calculate the inode statistics
2608          */
2609         group_free = 0;
2610         total_free = 0;
2611         count = 0;
2612         group = 0;
2613
2614         /* Protect loop from wrap-around if s_inodes_count maxed */
2615         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2616                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2617                         group_free++;
2618                         total_free++;
2619                 }
2620                 count++;
2621                 if ((count == fs->super->s_inodes_per_group) ||
2622                     (ino == fs->super->s_inodes_count)) {
2623                         ext2fs_bg_free_inodes_count_set(fs, group++,
2624                                                         group_free);
2625                         count = 0;
2626                         group_free = 0;
2627                 }
2628         }
2629         fs->super->s_free_inodes_count = total_free;
2630         ext2fs_mark_super_dirty(fs);
2631         return 0;
2632 }
2633
2634 #define list_for_each_safe(pos, pnext, head) \
2635         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2636              pos = pnext, pnext = pos->next)
2637
2638 static void free_blk_move_list(void)
2639 {
2640         struct list_head *entry, *tmp;
2641         struct blk_move *bmv;
2642
2643         list_for_each_safe(entry, tmp, &blk_move_list) {
2644                 bmv = list_entry(entry, struct blk_move, list);
2645                 list_del(entry);
2646                 ext2fs_free_mem(&bmv);
2647         }
2648         return;
2649 }
2650
2651 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2652 {
2653         errcode_t retval;
2654         int new_ino_blks_per_grp;
2655         ext2fs_block_bitmap bmap;
2656
2657         retval = ext2fs_read_inode_bitmap(fs);
2658         if (retval) {
2659                 fputs(_("Failed to read inode bitmap\n"), stderr);
2660                 return retval;
2661         }
2662         retval = ext2fs_read_block_bitmap(fs);
2663         if (retval) {
2664                 fputs(_("Failed to read block bitmap\n"), stderr);
2665                 return retval;
2666         }
2667         INIT_LIST_HEAD(&blk_move_list);
2668
2669
2670         new_ino_blks_per_grp = ext2fs_div_ceil(
2671                                         EXT2_INODES_PER_GROUP(fs->super)*
2672                                         new_size,
2673                                         fs->blocksize);
2674
2675         /* We may change the file system.
2676          * Mark the file system as invalid so that
2677          * the user is prompted to run fsck.
2678          */
2679         fs->super->s_state &= ~EXT2_VALID_FS;
2680
2681         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2682                                                 &bmap);
2683         if (retval) {
2684                 fputs(_("Failed to allocate block bitmap when "
2685                                 "increasing inode size\n"), stderr);
2686                 return retval;
2687         }
2688         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2689         if (retval) {
2690                 fputs(_("Not enough space to increase inode size \n"), stderr);
2691                 goto err_out;
2692         }
2693         retval = move_block(fs, bmap);
2694         if (retval) {
2695                 fputs(_("Failed to relocate blocks during inode resize \n"),
2696                       stderr);
2697                 goto err_out;
2698         }
2699         retval = inode_scan_and_fix(fs, bmap);
2700         if (retval)
2701                 goto err_out_undo;
2702
2703         retval = group_desc_scan_and_fix(fs, bmap);
2704         if (retval)
2705                 goto err_out_undo;
2706
2707         retval = expand_inode_table(fs, new_size);
2708         if (retval)
2709                 goto err_out_undo;
2710
2711         ext2fs_calculate_summary_stats(fs);
2712
2713         fs->super->s_state |= EXT2_VALID_FS;
2714         /* mark super block and block bitmap as dirty */
2715         ext2fs_mark_super_dirty(fs);
2716         ext2fs_mark_bb_dirty(fs);
2717
2718 err_out:
2719         free_blk_move_list();
2720         ext2fs_free_block_bitmap(bmap);
2721
2722         return retval;
2723
2724 err_out_undo:
2725         free_blk_move_list();
2726         ext2fs_free_block_bitmap(bmap);
2727         fputs(_("Error in resizing the inode size.\n"
2728                         "Run e2undo to undo the "
2729                         "file system changes. \n"), stderr);
2730
2731         return retval;
2732 }
2733
2734 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2735 {
2736         errcode_t retval = 0;
2737         const char *tdb_dir;
2738         char *tdb_file = NULL;
2739         char *dev_name, *tmp_name;
2740
2741         /* (re)open a specific undo file */
2742         if (undo_file && undo_file[0] != 0) {
2743                 retval = set_undo_io_backing_manager(*io_ptr);
2744                 if (retval)
2745                         goto err;
2746                 *io_ptr = undo_io_manager;
2747                 retval = set_undo_io_backup_file(undo_file);
2748                 if (retval)
2749                         goto err;
2750                 printf(_("Overwriting existing filesystem; this can be undone "
2751                          "using the command:\n"
2752                          "    e2undo %s %s\n\n"),
2753                          undo_file, name);
2754                 return retval;
2755         }
2756
2757         /*
2758          * Configuration via a conf file would be
2759          * nice
2760          */
2761         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2762         if (!tdb_dir)
2763                 tdb_dir = "/var/lib/e2fsprogs";
2764
2765         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2766             access(tdb_dir, W_OK))
2767                 return 0;
2768
2769         tmp_name = strdup(name);
2770         if (!tmp_name)
2771                 goto errout;
2772         dev_name = basename(tmp_name);
2773         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2774         if (!tdb_file) {
2775                 free(tmp_name);
2776                 goto errout;
2777         }
2778         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2779         free(tmp_name);
2780
2781         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2782                 retval = errno;
2783                 com_err(program_name, retval,
2784                         _("while trying to delete %s"), tdb_file);
2785                 goto errout;
2786         }
2787
2788         retval = set_undo_io_backing_manager(*io_ptr);
2789         if (retval)
2790                 goto errout;
2791         *io_ptr = undo_io_manager;
2792         retval = set_undo_io_backup_file(tdb_file);
2793         if (retval)
2794                 goto errout;
2795         printf(_("Overwriting existing filesystem; this can be undone "
2796                  "using the command:\n"
2797                  "    e2undo %s %s\n\n"),
2798                  tdb_file, name);
2799
2800         free(tdb_file);
2801         return 0;
2802 errout:
2803         free(tdb_file);
2804 err:
2805         com_err("tune2fs", retval, "while trying to setup undo file\n");
2806         return retval;
2807 }
2808
2809 static int
2810 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2811 {
2812         int retval, nr_users, start;
2813         journal_superblock_t *jsb;
2814         ext2_filsys jfs;
2815         __u8 *j_uuid;
2816         char *journal_path;
2817         char uuid[UUID_STR_SIZE];
2818         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
2819
2820         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
2821                 return 0;
2822
2823         uuid_unparse(sb->s_journal_uuid, uuid);
2824         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2825         if (!journal_path)
2826                 return 0;
2827
2828         retval = ext2fs_open2(journal_path, io_options,
2829                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2830                               0, 0, unix_io_manager, &jfs);
2831         if (retval) {
2832                 com_err(program_name, retval,
2833                         _("while trying to open %s"),
2834                         journal_path);
2835                 return retval;
2836         }
2837
2838         retval = get_journal_sb(jfs, buf);
2839         if (retval != 0) {
2840                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2841                         fprintf(stderr, _("%s is not a journal device.\n"),
2842                                 journal_path);
2843                 return retval;
2844         }
2845
2846         jsb = (journal_superblock_t *) buf;
2847         /* Find the filesystem UUID */
2848         nr_users = ntohl(jsb->s_nr_users);
2849
2850         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2851         if (j_uuid == NULL) {
2852                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2853                       stderr);
2854                 return EXT2_ET_LOAD_EXT_JOURNAL;
2855         }
2856
2857         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2858
2859         start = ext2fs_journal_sb_start(jfs->blocksize);
2860         /* Write back the journal superblock */
2861         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2862         if (retval != 0) {
2863                 com_err(program_name, retval,
2864                         "while writing journal superblock.");
2865                 return retval;
2866         }
2867
2868         ext2fs_close(jfs);
2869
2870         return 0;
2871 }
2872
2873 #ifndef BUILD_AS_LIB
2874 int main(int argc, char **argv)
2875 #else
2876 int tune2fs_main(int argc, char **argv)
2877 #endif  /* BUILD_AS_LIB */
2878 {
2879         errcode_t retval;
2880         ext2_filsys fs;
2881         struct ext2_super_block *sb;
2882         io_manager io_ptr, io_ptr_orig = NULL;
2883         int rc = 0;
2884         char default_undo_file[1] = { 0 };
2885
2886 #ifdef ENABLE_NLS
2887         setlocale(LC_MESSAGES, "");
2888         setlocale(LC_CTYPE, "");
2889         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2890         textdomain(NLS_CAT_NAME);
2891         set_com_err_gettext(gettext);
2892 #endif
2893         if (argc && *argv)
2894                 program_name = *argv;
2895         add_error_table(&et_ext2_error_table);
2896
2897 #ifdef CONFIG_BUILD_FINDFS
2898         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2899                 do_findfs(argc, argv);
2900 #endif
2901         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2902                 parse_e2label_options(argc, argv);
2903         else
2904                 parse_tune2fs_options(argc, argv);
2905
2906 #ifdef CONFIG_TESTIO_DEBUG
2907         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2908                 io_ptr = test_io_manager;
2909                 test_io_backing_manager = unix_io_manager;
2910         } else
2911 #endif
2912                 io_ptr = unix_io_manager;
2913
2914 retry_open:
2915         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2916                 open_flag |= EXT2_FLAG_SKIP_MMP;
2917
2918         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2919
2920         /* keep the filesystem struct around to dump MMP data */
2921         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2922
2923         retval = ext2fs_open2(device_name, io_options, open_flag,
2924                               0, 0, io_ptr, &fs);
2925         if (retval) {
2926                 com_err(program_name, retval,
2927                         _("while trying to open %s"),
2928                         device_name);
2929                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2930                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2931                         dump_mmp_msg(fs->mmp_buf,
2932                                      _("If you are sure the filesystem "
2933                                        "is not in use on any node, run:\n"
2934                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2935                 else if (retval == EXT2_ET_MMP_FAILED)
2936                         dump_mmp_msg(fs->mmp_buf, NULL);
2937                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2938                         fprintf(stderr,
2939                                 _("MMP block magic is bad. Try to fix it by "
2940                                   "running:\n'e2fsck -f %s'\n"), device_name);
2941                 else if (retval == EXT2_ET_BAD_MAGIC)
2942                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2943                 else if (retval != EXT2_ET_MMP_FAILED)
2944                         fprintf(stderr, "%s",
2945                              _("Couldn't find valid filesystem superblock.\n"));
2946
2947                 ext2fs_free(fs);
2948                 exit(1);
2949         }
2950         if (ext2fs_has_feature_journal_dev(fs->super)) {
2951                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2952                 ext2fs_free(fs);
2953                 exit(1);
2954         }
2955         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2956
2957         if (I_flag) {
2958                 /*
2959                  * Check the inode size is right so we can issue an
2960                  * error message and bail before setting up the tdb
2961                  * file.
2962                  */
2963                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2964                         fprintf(stderr, _("The inode size is already %lu\n"),
2965                                 new_inode_size);
2966                         rc = 1;
2967                         goto closefs;
2968                 }
2969                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2970                         fprintf(stderr, "%s",
2971                                 _("Shrinking inode size is not supported\n"));
2972                         rc = 1;
2973                         goto closefs;
2974                 }
2975                 if (new_inode_size > fs->blocksize) {
2976                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2977                                 new_inode_size, fs->blocksize);
2978                         rc = 1;
2979                         goto closefs;
2980                 }
2981                 check_fsck_needed(fs,
2982                         _("Resizing inodes could take some time."));
2983                 /*
2984                  * If inode resize is requested use the
2985                  * Undo I/O manager
2986                  */
2987                 undo_file = default_undo_file;
2988         }
2989
2990         /* Set up an undo file */
2991         if (undo_file && io_ptr_orig == NULL) {
2992                 io_ptr_orig = io_ptr;
2993                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2994                 if (retval) {
2995                         rc = 1;
2996                         goto closefs;
2997                 }
2998                 if (io_ptr != io_ptr_orig) {
2999                         ext2fs_close_free(&fs);
3000                         goto retry_open;
3001                 }
3002         }
3003
3004         sb = fs->super;
3005         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3006
3007         if (print_label) {
3008                 /* For e2label emulation */
3009                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
3010                        sb->s_volume_name);
3011                 remove_error_table(&et_ext2_error_table);
3012                 goto closefs;
3013         }
3014
3015         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
3016         if (retval) {
3017                 com_err("ext2fs_check_if_mount", retval,
3018                         _("while determining whether %s is mounted."),
3019                         device_name);
3020                 rc = 1;
3021                 goto closefs;
3022         }
3023         /* Normally we only need to write out the superblock */
3024         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3025
3026         if (c_flag) {
3027                 sb->s_max_mnt_count = max_mount_count;
3028                 ext2fs_mark_super_dirty(fs);
3029                 printf(_("Setting maximal mount count to %d\n"),
3030                        max_mount_count);
3031         }
3032         if (C_flag) {
3033                 sb->s_mnt_count = mount_count;
3034                 ext2fs_mark_super_dirty(fs);
3035                 printf(_("Setting current mount count to %d\n"), mount_count);
3036         }
3037         if (e_flag) {
3038                 sb->s_errors = errors;
3039                 ext2fs_mark_super_dirty(fs);
3040                 printf(_("Setting error behavior to %d\n"), errors);
3041         }
3042         if (g_flag) {
3043                 sb->s_def_resgid = resgid;
3044                 ext2fs_mark_super_dirty(fs);
3045                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3046         }
3047         if (i_flag) {
3048                 if ((unsigned long long)interval >= (1ULL << 32)) {
3049                         com_err(program_name, 0,
3050                                 _("interval between checks is too big (%lu)"),
3051                                 interval);
3052                         rc = 1;
3053                         goto closefs;
3054                 }
3055                 sb->s_checkinterval = interval;
3056                 ext2fs_mark_super_dirty(fs);
3057                 printf(_("Setting interval between checks to %lu seconds\n"),
3058                        interval);
3059         }
3060         if (m_flag) {
3061                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3062                                           ext2fs_blocks_count(sb) / 100.0);
3063                 ext2fs_mark_super_dirty(fs);
3064                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3065                         reserved_ratio, ext2fs_r_blocks_count(sb));
3066         }
3067         if (r_flag) {
3068                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3069                         com_err(program_name, 0,
3070                                 _("reserved blocks count is too big (%llu)"),
3071                                 reserved_blocks);
3072                         rc = 1;
3073                         goto closefs;
3074                 }
3075                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3076                 ext2fs_mark_super_dirty(fs);
3077                 printf(_("Setting reserved blocks count to %llu\n"),
3078                        reserved_blocks);
3079         }
3080         if (s_flag == 1) {
3081                 if (ext2fs_has_feature_sparse_super(sb)) {
3082                         fputs(_("\nThe filesystem already has sparse "
3083                                 "superblocks.\n"), stderr);
3084                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3085                         fputs(_("\nSetting the sparse superblock flag not "
3086                                 "supported\nfor filesystems with "
3087                                 "the meta_bg feature enabled.\n"),
3088                                 stderr);
3089                         rc = 1;
3090                         goto closefs;
3091                 } else {
3092                         ext2fs_set_feature_sparse_super(sb);
3093                         sb->s_state &= ~EXT2_VALID_FS;
3094                         ext2fs_mark_super_dirty(fs);
3095                         printf(_("\nSparse superblock flag set.  %s"),
3096                                _(please_fsck));
3097                 }
3098         }
3099         if (s_flag == 0) {
3100                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3101                       stderr);
3102                 rc = 1;
3103                 goto closefs;
3104         }
3105         if (T_flag) {
3106                 sb->s_lastcheck = last_check_time;
3107                 ext2fs_mark_super_dirty(fs);
3108                 printf(_("Setting time filesystem last checked to %s\n"),
3109                        ctime(&last_check_time));
3110         }
3111         if (u_flag) {
3112                 sb->s_def_resuid = resuid;
3113                 ext2fs_mark_super_dirty(fs);
3114                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3115         }
3116         if (L_flag) {
3117                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3118                         fputs(_("Warning: label too long, truncating.\n"),
3119                               stderr);
3120                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3121                 strncpy(sb->s_volume_name, new_label,
3122                         sizeof(sb->s_volume_name));
3123                 ext2fs_mark_super_dirty(fs);
3124         }
3125         if (M_flag) {
3126                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3127                 strncpy(sb->s_last_mounted, new_last_mounted,
3128                         sizeof(sb->s_last_mounted));
3129                 ext2fs_mark_super_dirty(fs);
3130         }
3131         if (mntopts_cmd) {
3132                 rc = update_mntopts(fs, mntopts_cmd);
3133                 if (rc)
3134                         goto closefs;
3135         }
3136         if (features_cmd) {
3137                 rc = update_feature_set(fs, features_cmd);
3138                 if (rc)
3139                         goto closefs;
3140         }
3141         if (extended_cmd) {
3142                 rc = parse_extended_opts(fs, extended_cmd);
3143                 if (rc)
3144                         goto closefs;
3145                 if (clear_mmp && !f_flag) {
3146                         fputs(_("Error in using clear_mmp. "
3147                                 "It must be used with -f\n"),
3148                               stderr);
3149                         goto closefs;
3150                 }
3151         }
3152         if (clear_mmp) {
3153                 rc = ext2fs_mmp_clear(fs);
3154                 goto closefs;
3155         }
3156         if (journal_size || journal_device) {
3157                 rc = add_journal(fs);
3158                 if (rc)
3159                         goto closefs;
3160         }
3161
3162         if (Q_flag) {
3163                 if (mount_flags & EXT2_MF_MOUNTED) {
3164                         fputs(_("The quota feature may only be changed when "
3165                                 "the filesystem is unmounted.\n"), stderr);
3166                         rc = 1;
3167                         goto closefs;
3168                 }
3169                 handle_quota_options(fs);
3170         }
3171
3172         if (U_flag) {
3173                 int set_csum = 0;
3174                 dgrp_t i;
3175                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3176                 __u8 old_uuid[UUID_SIZE];
3177
3178                 if (ext2fs_has_group_desc_csum(fs)) {
3179                         /*
3180                          * Changing the UUID on a metadata_csum FS requires
3181                          * rewriting all metadata, which can race with a
3182                          * mounted fs.  Don't allow that unless we're saving
3183                          * the checksum seed.
3184                          */
3185                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3186                             !ext2fs_has_feature_csum_seed(fs->super) &&
3187                             ext2fs_has_feature_metadata_csum(fs->super)) {
3188                                 fputs(_("The UUID may only be "
3189                                         "changed when the filesystem is "
3190                                         "unmounted.\n"), stderr);
3191                                 fputs(_("If you only use kernels newer than "
3192                                         "v4.4, run 'tune2fs -O "
3193                                         "metadata_csum_seed' and re-run this "
3194                                         "command.\n"), stderr);
3195                                 try_confirm_csum_seed_support();
3196                                 exit(1);
3197                         }
3198                         if (!ext2fs_has_feature_csum_seed(fs->super))
3199                                 check_fsck_needed(fs,
3200                                         _("Setting UUID on a checksummed "
3201                                           "filesystem could take some time."));
3202
3203                         /*
3204                          * Determine if the block group checksums are
3205                          * correct so we know whether or not to set
3206                          * them later on.
3207                          */
3208                         for (i = 0; i < fs->group_desc_count; i++)
3209                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3210                                         break;
3211                         if (i >= fs->group_desc_count)
3212                                 set_csum = 1;
3213                 }
3214
3215                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
3216                 if ((strcasecmp(new_UUID, "null") == 0) ||
3217                     (strcasecmp(new_UUID, "clear") == 0)) {
3218                         uuid_clear(sb->s_uuid);
3219                 } else if (strcasecmp(new_UUID, "time") == 0) {
3220                         uuid_generate_time(sb->s_uuid);
3221                 } else if (strcasecmp(new_UUID, "random") == 0) {
3222                         uuid_generate(sb->s_uuid);
3223                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
3224                         com_err(program_name, 0, "%s",
3225                                 _("Invalid UUID format\n"));
3226                         rc = 1;
3227                         goto closefs;
3228                 }
3229                 ext2fs_init_csum_seed(fs);
3230                 if (set_csum) {
3231                         for (i = 0; i < fs->group_desc_count; i++)
3232                                 ext2fs_group_desc_csum_set(fs, i);
3233                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3234                 }
3235
3236                 /* If this is a journal dev, we need to copy UUID into jsb */
3237                 if (!(rc = get_journal_sb(fs, buf))) {
3238                         journal_superblock_t *jsb;
3239
3240                         jsb = (journal_superblock_t *) buf;
3241                         fputs(_("Need to update journal superblock.\n"), stdout);
3242                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3243
3244                         /* Writeback the journal superblock */
3245                         if ((rc = io_channel_write_blk64(fs->io,
3246                                 ext2fs_journal_sb_start(fs->blocksize),
3247                                         -SUPERBLOCK_SIZE, buf)))
3248                                 goto closefs;
3249                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3250                         goto closefs;
3251                 else {
3252                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3253
3254                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3255                                 goto closefs;
3256                 }
3257
3258                 ext2fs_mark_super_dirty(fs);
3259                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3260                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3261                      ext2fs_has_feature_ea_inode(fs->super)))
3262                         rewrite_checksums = 1;
3263         }
3264
3265         if (I_flag) {
3266                 if (mount_flags & EXT2_MF_MOUNTED) {
3267                         fputs(_("The inode size may only be "
3268                                 "changed when the filesystem is "
3269                                 "unmounted.\n"), stderr);
3270                         rc = 1;
3271                         goto closefs;
3272                 }
3273                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3274                         fputs(_("Changing the inode size not supported for "
3275                                 "filesystems with the flex_bg\n"
3276                                 "feature enabled.\n"),
3277                               stderr);
3278                         rc = 1;
3279                         goto closefs;
3280                 }
3281                 /*
3282                  * We want to update group descriptor also
3283                  * with the new free inode count
3284                  */
3285                 if (rewrite_checksums)
3286                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3287                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3288                 retval = resize_inode(fs, new_inode_size);
3289                 if (rewrite_checksums)
3290                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3291                 if (retval == 0) {
3292                         printf(_("Setting inode size %lu\n"),
3293                                                         new_inode_size);
3294                         rewrite_checksums = 1;
3295                 } else {
3296                         printf("%s", _("Failed to change inode size\n"));
3297                         rc = 1;
3298                         goto closefs;
3299                 }
3300         }
3301
3302         if (rewrite_checksums)
3303                 rewrite_metadata_checksums(fs);
3304
3305         if (l_flag)
3306                 list_super(sb);
3307         if (stride_set) {
3308                 sb->s_raid_stride = stride;
3309                 ext2fs_mark_super_dirty(fs);
3310                 printf(_("Setting stride size to %d\n"), stride);
3311         }
3312         if (stripe_width_set) {
3313                 sb->s_raid_stripe_width = stripe_width;
3314                 ext2fs_mark_super_dirty(fs);
3315                 printf(_("Setting stripe width to %d\n"), stripe_width);
3316         }
3317         if (ext_mount_opts) {
3318                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3319                         sizeof(fs->super->s_mount_opts));
3320                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3321                 ext2fs_mark_super_dirty(fs);
3322                 printf(_("Setting extended default mount options to '%s'\n"),
3323                        ext_mount_opts);
3324                 free(ext_mount_opts);
3325         }
3326
3327 #ifdef NO_RECOVERY
3328         /* Warn if file system needs recovery and it is opened for writing. */
3329         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3330             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3331             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3332                 fprintf(stderr,
3333 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3334   "\te2fsck -E journal_only %s\n\n"
3335   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3336   "by journal recovery.\n"), device_name);
3337         }
3338 #else
3339         /* Recover the journal if possible. */
3340         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3341             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3342                 errcode_t err;
3343
3344                 printf(_("Recovering journal.\n"));
3345                 err = ext2fs_run_ext3_journal(&fs);
3346                 if (err) {
3347                         com_err("tune2fs", err, "while recovering journal.\n");
3348                         printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
3349                         if (fs)
3350                                 ext2fs_close_free(&fs);
3351                         exit(1);
3352                 }
3353                 ext2fs_clear_feature_journal_needs_recovery(fs->super);
3354                 ext2fs_mark_super_dirty(fs);
3355         }
3356 #endif
3357
3358         free(device_name);
3359         remove_error_table(&et_ext2_error_table);
3360
3361 closefs:
3362         if (rc) {
3363                 ext2fs_mmp_stop(fs);
3364 #ifndef BUILD_AS_LIB
3365                 exit(1);
3366 #endif
3367         }
3368
3369         if (feature_64bit)
3370                 convert_64bit(fs, feature_64bit);
3371         return (ext2fs_close_free(&fs) ? 1 : 0);
3372 }