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>     /* for PATH_MAX */
  55 #ifdef HAVE_SYS_IOCTL_H
  56 #include <sys/ioctl.h>
  57 #endif
  58
  59 #ifndef PATH_MAX
  60 #define PATH_MAX 4096
  61 #endif
  62
  63 #include "ext2fs/ext2_fs.h"
  64 #include "ext2fs/ext2fs.h"
  65 #include "ext2fs/kernel-jbd.h"
  66 #include "et/com_err.h"
  67 #include "support/plausible.h"
  68 #include "support/quotaio.h"
  69 #include "support/devname.h"
  70 #include "uuid/uuid.h"
  71 #include "e2p/e2p.h"
  72 #include "util.h"
  73 #include "blkid/blkid.h"
  74
  75 #include "../version.h"
  76 #include "support/nls-enable.h"
  77
  78 #define QOPT_ENABLE     (1)
  79 #define QOPT_DISABLE    (-1)
  80
  81 #ifndef FS_IOC_SETFSLABEL
  82 #define FSLABEL_MAX 256
  83 #define FS_IOC_SETFSLABEL       _IOW(0x94, 50, char[FSLABEL_MAX])
  84 #endif
  85
  86 #ifndef FS_IOC_GETFSLABEL
  87 #define FS_IOC_GETFSLABEL       _IOR(0x94, 49, char[FSLABEL_MAX])
  88 #endif
  89
  90 struct fsuuid {
  91         __u32   fsu_len;
  92         __u32   fsu_flags;
  93         __u8    fsu_uuid[];
  94 };
  95
  96 #ifndef EXT4_IOC_GETFSUUID
  97 #define EXT4_IOC_GETFSUUID      _IOR('f', 44, struct fsuuid)
  98 #endif
  99
 100 #ifndef EXT4_IOC_SETFSUUID
 101 #define EXT4_IOC_SETFSUUID      _IOW('f', 44, struct fsuuid)
 102 #endif
 103
 104 extern int ask_yn(const char *string, int def);
 105
 106 const char *program_name = "tune2fs";
 107 char *device_name;
 108 char *new_label, *new_last_mounted, *requested_uuid;
 109 char *io_options;
 110 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
 111 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
 112 static int I_flag;
 113 static int clear_mmp;
 114 static time_t last_check_time;
 115 static int print_label;
 116 static int max_mount_count, mount_count, mount_flags;
 117 static unsigned long interval;
 118 static blk64_t reserved_blocks;
 119 static double reserved_ratio;
 120 static unsigned long resgid, resuid;
 121 static unsigned short errors;
 122 static int open_flag;
 123 static char *features_cmd;
 124 static char *mntopts_cmd;
 125 static int stride, stripe_width;
 126 static int stride_set, stripe_width_set;
 127 static char *extended_cmd;
 128 static unsigned long new_inode_size;
 129 static char *ext_mount_opts;
 130 static int quota_enable[MAXQUOTAS];
 131 static int rewrite_checksums;
 132 static int feature_64bit;
 133 static int fsck_requested;
 134 static char *undo_file;
 135 int enabling_casefold;
 136
 137 int journal_size, journal_fc_size, journal_flags;
 138 char *journal_device;
 139 static blk64_t journal_location = ~0LL;
 140 static e2_blkcnt_t orphan_file_blocks;
 141
 142 static struct list_head blk_move_list;
 143
 144 struct blk_move {
 145         struct list_head list;
 146         blk64_t old_loc;
 147         blk64_t new_loc;
 148 };
 149
 150 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 151
 152 static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
 153
 154 static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 155 static const char *please_dir_fsck =
 156                 N_("Please run e2fsck -fD on the filesystem.\n");
 157
 158 #ifdef CONFIG_BUILD_FINDFS
 159 void do_findfs(int argc, char **argv);
 160 #endif
 161
 162 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
 163 int journal_enable_debug = -1;
 164 #endif
 165
 166 static void usage(void)
 167 {
 168         fprintf(stderr,
 169                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
 170                   "[-g group]\n"
 171                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 172                   "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
 173                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
 174                   "\t[-L volume_label] [-M last_mounted_dir]\n"
 175                   "\t[-O [^]feature[,...]] [-Q quota_options]\n"
 176                   "\t[-E extended-option[,...]] [-T last_check_time] "
 177                   "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
 178                 program_name);
 179         exit(1);
 180 }
 181
 182 static __u32 ok_features[3] = {
 183         /* Compat */
 184         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 185                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 186                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 187                 EXT4_FEATURE_COMPAT_STABLE_INODES |
 188                 EXT4_FEATURE_COMPAT_ORPHAN_FILE,
 189         /* Incompat */
 190         EXT2_FEATURE_INCOMPAT_FILETYPE |
 191                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 192                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 193                 EXT4_FEATURE_INCOMPAT_EA_INODE|
 194                 EXT4_FEATURE_INCOMPAT_MMP |
 195                 EXT4_FEATURE_INCOMPAT_64BIT |
 196                 EXT4_FEATURE_INCOMPAT_ENCRYPT |
 197                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 198                 EXT4_FEATURE_INCOMPAT_LARGEDIR |
 199                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 200         /* R/O compat */
 201         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 202                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 203                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 204                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 205                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 206                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 207                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 208                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 209                 EXT4_FEATURE_RO_COMPAT_READONLY |
 210                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 211                 EXT4_FEATURE_RO_COMPAT_VERITY
 212 };
 213
 214 static __u32 clear_ok_features[3] = {
 215         /* Compat */
 216         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 217                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 218                 EXT2_FEATURE_COMPAT_DIR_INDEX |
 219                 EXT4_FEATURE_COMPAT_FAST_COMMIT |
 220                 EXT4_FEATURE_COMPAT_ORPHAN_FILE,
 221         /* Incompat */
 222         EXT2_FEATURE_INCOMPAT_FILETYPE |
 223                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 224                 EXT4_FEATURE_INCOMPAT_MMP |
 225                 EXT4_FEATURE_INCOMPAT_64BIT |
 226                 EXT4_FEATURE_INCOMPAT_CSUM_SEED |
 227                 EXT4_FEATURE_INCOMPAT_CASEFOLD,
 228         /* R/O compat */
 229         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 230                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 231                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 232                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 233                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 234                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 235                 EXT4_FEATURE_RO_COMPAT_PROJECT |
 236                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
 237                 EXT4_FEATURE_RO_COMPAT_READONLY
 238 };
 239
 240 /**
 241  * Try to get journal super block if any
 242  */
 243 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 244 {
 245         int retval;
 246         journal_superblock_t *jsb;
 247
 248         if (!ext2fs_has_feature_journal_dev(jfs->super)) {
 249                 return EXT2_ET_UNSUPP_FEATURE;
 250         }
 251
 252         /* Get the journal superblock */
 253         if ((retval = io_channel_read_blk64(jfs->io,
 254             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 255                 com_err(program_name, retval, "%s",
 256                 _("while reading journal superblock"));
 257                 return retval;
 258         }
 259
 260         jsb = (journal_superblock_t *) buf;
 261         if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
 262             (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
 263                 fputs(_("Journal superblock not found!\n"), stderr);
 264                 return EXT2_ET_BAD_MAGIC;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
 271                           int nr_users)
 272 {
 273         int i;
 274         for (i = 0; i < nr_users; i++) {
 275                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 276                         return &s_users[i * UUID_SIZE];
 277         }
 278
 279         return NULL;
 280 }
 281
 282 /*
 283  * Remove an external journal from the filesystem
 284  */
 285 static int remove_journal_device(ext2_filsys fs)
 286 {
 287         char            *journal_path;
 288         ext2_filsys     jfs;
 289         char            buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
 290         journal_superblock_t    *jsb;
 291         int             i, nr_users;
 292         errcode_t       retval;
 293         int             commit_remove_journal = 0;
 294         io_manager      io_ptr;
 295
 296         if (f_flag)
 297                 commit_remove_journal = 1; /* force removal even if error */
 298
 299         uuid_unparse(fs->super->s_journal_uuid, buf);
 300         journal_path = blkid_get_devname(NULL, "UUID", buf);
 301
 302         if (!journal_path) {
 303                 journal_path =
 304                         ext2fs_find_block_device(fs->super->s_journal_dev);
 305                 if (!journal_path)
 306                         goto no_valid_journal;
 307         }
 308
 309 #ifdef CONFIG_TESTIO_DEBUG
 310         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 311                 io_ptr = test_io_manager;
 312                 test_io_backing_manager = unix_io_manager;
 313         } else
 314 #endif
 315                 io_ptr = unix_io_manager;
 316         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 317                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 318                              fs->blocksize, io_ptr, &jfs);
 319         if (retval) {
 320                 com_err(program_name, retval, "%s",
 321                         _("while trying to open external journal"));
 322                 goto no_valid_journal;
 323         }
 324
 325         if ((retval = get_journal_sb(jfs, buf))) {
 326                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 327                         fprintf(stderr, _("%s is not a journal device.\n"),
 328                                 journal_path);
 329                 goto no_valid_journal;
 330         }
 331
 332         jsb = (journal_superblock_t *) buf;
 333         /* Find the filesystem UUID */
 334         nr_users = ntohl(jsb->s_nr_users);
 335         if (nr_users > JBD2_USERS_MAX) {
 336                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
 337                                  "is too high (%d).\n"), nr_users);
 338                 commit_remove_journal = 1;
 339                 goto no_valid_journal;
 340         }
 341
 342         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 343                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 344                       stderr);
 345                 commit_remove_journal = 1;
 346                 goto no_valid_journal;
 347         }
 348         nr_users--;
 349         for (i = 0; i < nr_users; i++)
 350                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 351         jsb->s_nr_users = htonl(nr_users);
 352
 353         /* Write back the journal superblock */
 354         retval = io_channel_write_blk64(jfs->io,
 355                                         ext2fs_journal_sb_start(fs->blocksize),
 356                                         -SUPERBLOCK_SIZE, buf);
 357         if (retval) {
 358                 com_err(program_name, retval,
 359                         "while writing journal superblock.");
 360                 goto no_valid_journal;
 361         }
 362
 363         commit_remove_journal = 1;
 364
 365 no_valid_journal:
 366         if (commit_remove_journal == 0) {
 367                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 368                         "Use -f option to remove missing journal device.\n"),
 369                       stderr);
 370                 return 1;
 371         }
 372         fs->super->s_journal_dev = 0;
 373         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 374         uuid_clear(fs->super->s_journal_uuid);
 375         ext2fs_mark_super_dirty(fs);
 376         fputs(_("Journal removed\n"), stdout);
 377         free(journal_path);
 378
 379         return 0;
 380 }
 381
 382 /* Helper function for remove_journal_inode */
 383 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 384                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 385                                blk64_t ref_block EXT2FS_ATTR((unused)),
 386                                int ref_offset EXT2FS_ATTR((unused)),
 387                                void *private EXT2FS_ATTR((unused)))
 388 {
 389         blk64_t block;
 390         int     group;
 391
 392         block = *blocknr;
 393         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 394         group = ext2fs_group_of_blk2(fs, block);
 395         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 396         ext2fs_group_desc_csum_set(fs, group);
 397         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 398         return 0;
 399 }
 400
 401 /*
 402  * Remove the journal inode from the filesystem
 403  */
 404 static errcode_t remove_journal_inode(ext2_filsys fs)
 405 {
 406         struct ext2_inode       inode;
 407         errcode_t               retval;
 408         ext2_ino_t              ino = fs->super->s_journal_inum;
 409
 410         retval = ext2fs_read_inode(fs, ino,  &inode);
 411         if (retval) {
 412                 com_err(program_name, retval, "%s",
 413                         _("while reading journal inode"));
 414                 return retval;
 415         }
 416         if (ino == EXT2_JOURNAL_INO) {
 417                 retval = ext2fs_read_bitmaps(fs);
 418                 if (retval) {
 419                         com_err(program_name, retval, "%s",
 420                                 _("while reading bitmaps"));
 421                         return retval;
 422                 }
 423                 retval = ext2fs_block_iterate3(fs, ino,
 424                                                BLOCK_FLAG_READ_ONLY, NULL,
 425                                                release_blocks_proc, NULL);
 426                 if (retval) {
 427                         com_err(program_name, retval, "%s",
 428                                 _("while clearing journal inode"));
 429                         return retval;
 430                 }
 431                 fs->super->s_overhead_clusters -=
 432                         EXT2FS_NUM_B2C(fs, EXT2_I_SIZE(&inode) / fs->blocksize);
 433                 memset(&inode, 0, sizeof(inode));
 434                 ext2fs_mark_bb_dirty(fs);
 435                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 436         } else
 437                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 438         retval = ext2fs_write_inode(fs, ino, &inode);
 439         if (retval) {
 440                 com_err(program_name, retval, "%s",
 441                         _("while writing journal inode"));
 442                 return retval;
 443         }
 444         fs->super->s_journal_inum = 0;
 445         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 446         ext2fs_mark_super_dirty(fs);
 447
 448         return 0;
 449 }
 450
 451 /*
 452  * Update the default mount options
 453  */
 454 static int update_mntopts(ext2_filsys fs, char *mntopts)
 455 {
 456         struct ext2_super_block *sb = fs->super;
 457
 458         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 459                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 460                         mntopts);
 461                 return 1;
 462         }
 463         ext2fs_mark_super_dirty(fs);
 464
 465         return 0;
 466 }
 467
 468 static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 469 {
 470         /* Refuse to modify anything but a freshly checked valid filesystem. */
 471         if (!(fs->super->s_state & EXT2_VALID_FS) ||
 472             (fs->super->s_state & EXT2_ERROR_FS) ||
 473             (fs->super->s_lastcheck < fs->super->s_mtime)) {
 474                 puts(_(fsck_explain));
 475                 puts(_(please_fsck));
 476                 if (mount_flags & EXT2_MF_READONLY)
 477                         printf("%s", _("(and reboot afterwards!)\n"));
 478                 return 1;
 479         }
 480
 481         /* Give the admin a few seconds to bail out of a dangerous op. */
 482         if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
 483                 return 0;
 484
 485         puts(prompt);
 486         proceed_question(5);
 487
 488         return 0;
 489 }
 490
 491 static void request_dir_fsck_afterwards(ext2_filsys fs)
 492 {
 493         static int requested;
 494
 495         if (requested++)
 496                 return;
 497         fsck_requested++;
 498         fs->super->s_state &= ~EXT2_VALID_FS;
 499         puts(_(fsck_explain));
 500         puts(_(please_dir_fsck));
 501         if (mount_flags & EXT2_MF_READONLY)
 502                 printf("%s", _("(and reboot afterwards!)\n"));
 503 }
 504
 505 static void request_fsck_afterwards(ext2_filsys fs)
 506 {
 507         static int requested = 0;
 508
 509         if (requested++)
 510                 return;
 511         fsck_requested++;
 512         fs->super->s_state &= ~EXT2_VALID_FS;
 513         printf("\n%s\n", _(please_fsck));
 514         if (mount_flags & EXT2_MF_READONLY)
 515                 printf("%s", _("(and reboot afterwards!)\n"));
 516 }
 517
 518 static void convert_64bit(ext2_filsys fs, int direction)
 519 {
 520         /*
 521          * Is resize2fs going to demand a fsck run? Might as well tell the
 522          * user now.
 523          */
 524         if (!fsck_requested &&
 525             ((fs->super->s_state & EXT2_ERROR_FS) ||
 526              !(fs->super->s_state & EXT2_VALID_FS) ||
 527              fs->super->s_lastcheck < fs->super->s_mtime))
 528                 request_fsck_afterwards(fs);
 529         if (fsck_requested)
 530                 fprintf(stderr, _("After running e2fsck, please run `resize2fs %s %s"),
 531                         direction > 0 ? "-b" : "-s", fs->device_name);
 532         else
 533                 fprintf(stderr, _("Please run `resize2fs %s %s"),
 534                         direction > 0 ? "-b" : "-s", fs->device_name);
 535
 536         if (undo_file)
 537                 fprintf(stderr, _(" -z \"%s\""), undo_file);
 538         if (direction > 0)
 539                 fprintf(stderr, _("' to enable 64-bit mode.\n"));
 540         else
 541                 fprintf(stderr, _("' to disable 64-bit mode.\n"));
 542 }
 543
 544 /*
 545  * Rewrite directory blocks with checksums
 546  */
 547 struct rewrite_dir_context {
 548         char *buf;
 549         errcode_t errcode;
 550         ext2_ino_t dir;
 551         int is_htree:1;
 552         int clear_htree:1;
 553 };
 554
 555 static int rewrite_dir_block(ext2_filsys fs,
 556                              blk64_t    *blocknr,
 557                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 558                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 559                              int        ref_offset EXT2FS_ATTR((unused)),
 560                              void       *priv_data)
 561 {
 562         struct ext2_dx_countlimit *dcl = NULL;
 563         struct rewrite_dir_context *ctx = priv_data;
 564         int dcl_offset, changed = 0;
 565
 566         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 567                                               ctx->dir);
 568         if (ctx->errcode)
 569                 return BLOCK_ABORT;
 570
 571         /*
 572          * if htree node... Note that if we are clearing htree structures from
 573          * the directory, we treat the htree internal block as an ordinary leaf.
 574          * The code below will do the right thing and make space for checksum
 575          * there.
 576          */
 577         if (ctx->is_htree && !ctx->clear_htree)
 578                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 579                                          &dcl, &dcl_offset);
 580         if (dcl) {
 581                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 582                         /* Ensure limit is the max size */
 583                         int max_entries = (fs->blocksize - dcl_offset) /
 584                                           sizeof(struct ext2_dx_entry);
 585                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 586                                 changed = 1;
 587                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 588                         }
 589                 } else {
 590                         /* If htree block is full then rebuild the dir */
 591                         if (ext2fs_le16_to_cpu(dcl->count) ==
 592                             ext2fs_le16_to_cpu(dcl->limit)) {
 593                                 request_dir_fsck_afterwards(fs);
 594                                 return 0;
 595                         }
 596                         /*
 597                          * Ensure dcl->limit is small enough to leave room for
 598                          * the checksum tail.
 599                          */
 600                         int max_entries = (fs->blocksize - (dcl_offset +
 601                                                 sizeof(struct ext2_dx_tail))) /
 602                                           sizeof(struct ext2_dx_entry);
 603                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 604                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 605                         /* Always rewrite checksum */
 606                         changed = 1;
 607                 }
 608         } else {
 609                 unsigned int rec_len, name_size;
 610                 char *top = ctx->buf + fs->blocksize;
 611                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 612                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 613
 614                 /* Find last and penultimate dirent */
 615                 while ((char *)de < top) {
 616                         penultimate_de = last_de;
 617                         last_de = de;
 618                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 619                         if (!ctx->errcode && !rec_len)
 620                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 621                         if (ctx->errcode)
 622                                 return BLOCK_ABORT;
 623                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 624                 }
 625                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 626                 if (ctx->errcode)
 627                         return BLOCK_ABORT;
 628                 name_size = ext2fs_dirent_name_len(last_de);
 629
 630                 if (!ext2fs_has_feature_metadata_csum(fs->super)) {
 631                         if (!penultimate_de)
 632                                 return 0;
 633                         if (last_de->inode ||
 634                             name_size ||
 635                             rec_len != sizeof(struct ext2_dir_entry_tail))
 636                                 return 0;
 637                         /*
 638                          * The last dirent is unused and the right length to
 639                          * have stored a checksum.  Erase it.
 640                          */
 641                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 642                                                           &rec_len);
 643                         if (!rec_len)
 644                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 645                         if (ctx->errcode)
 646                                 return BLOCK_ABORT;
 647                         ext2fs_set_rec_len(fs, rec_len +
 648                                         sizeof(struct ext2_dir_entry_tail),
 649                                         penultimate_de);
 650                         changed = 1;
 651                 } else {
 652                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 653                         struct ext2_dir_entry_tail *t;
 654
 655                         /*
 656                          * If the last dirent looks like the tail, just update
 657                          * the checksum.
 658                          */
 659                         if (!last_de->inode &&
 660                             rec_len == csum_size) {
 661                                 t = (struct ext2_dir_entry_tail *)last_de;
 662                                 t->det_reserved_name_len =
 663                                                 EXT2_DIR_NAME_LEN_CSUM;
 664                                 changed = 1;
 665                                 goto out;
 666                         }
 667                         if (name_size & 3)
 668                                 name_size = (name_size & ~3) + 4;
 669                         /* If there's not enough space for the tail, e2fsck */
 670                         if (rec_len <= (8 + name_size + csum_size)) {
 671                                 request_dir_fsck_afterwards(fs);
 672                                 return 0;
 673                         }
 674                         /* Shorten that last de and insert the tail */
 675                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 676                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 677                         ext2fs_initialize_dirent_tail(fs, t);
 678
 679                         /* Always update checksum */
 680                         changed = 1;
 681                 }
 682         }
 683
 684 out:
 685         if (!changed)
 686                 return 0;
 687
 688         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 689                                                0, ctx->dir);
 690         if (ctx->errcode)
 691                 return BLOCK_ABORT;
 692
 693         return 0;
 694 }
 695
 696 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 697                                    struct ext2_inode *inode)
 698 {
 699         errcode_t       retval;
 700         struct rewrite_dir_context ctx;
 701
 702         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 703         if (retval)
 704                 return retval;
 705
 706         ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
 707         ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
 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         if (ctx.is_htree && ctx.clear_htree) {
 719                 inode->i_flags &= ~EXT2_INDEX_FL;
 720                 retval = ext2fs_write_inode(fs, dir, inode);
 721                 if (retval)
 722                         return retval;
 723         }
 724
 725         return ctx.errcode;
 726 }
 727
 728 /*
 729  * Context information that does not change across rewrite_one_inode()
 730  * invocations.
 731  */
 732 struct rewrite_context {
 733         ext2_filsys fs;
 734         struct ext2_inode *zero_inode;
 735         char *ea_buf;
 736         int inode_size;
 737 };
 738
 739 #define fatal_err(code, args...)                \
 740         do {                                    \
 741                 com_err(__func__, code, args);  \
 742                 exit(1);                        \
 743         } while (0);
 744
 745 static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
 746                                  struct ext2_inode *inode)
 747 {
 748         errcode_t retval;
 749         ext2_file_t file;
 750         __u32 hash;
 751
 752         retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
 753         if (retval)
 754                 fatal_err(retval, "open ea_inode");
 755         retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
 756                                   NULL);
 757         if (retval)
 758                 fatal_err(retval, "read ea_inode");
 759         retval = ext2fs_file_close(file);
 760         if (retval)
 761                 fatal_err(retval, "close ea_inode");
 762
 763         hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
 764                                 (unsigned char *) ctx->ea_buf, inode->i_size);
 765         ext2fs_set_ea_inode_hash(inode, hash);
 766 }
 767
 768 static int update_xattr_entry_hashes(ext2_filsys fs,
 769                                      struct ext2_ext_attr_entry *entry,
 770                                      struct ext2_ext_attr_entry *end)
 771 {
 772         int modified = 0;
 773         errcode_t retval;
 774
 775         while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 776                 if (entry->e_value_inum) {
 777                         retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
 778                                                              &entry->e_hash);
 779                         if (retval)
 780                                 fatal_err(retval, "hash ea_inode entry");
 781                         modified = 1;
 782                 }
 783                 entry = EXT2_EXT_ATTR_NEXT(entry);
 784         }
 785         return modified;
 786 }
 787
 788 static void update_inline_xattr_hashes(struct rewrite_context *ctx,
 789                                        struct ext2_inode_large *inode)
 790 {
 791         struct ext2_ext_attr_entry *start, *end;
 792         __u32 *ea_magic;
 793
 794         if (inode->i_extra_isize == 0)
 795                 return;
 796
 797         if (inode->i_extra_isize & 3 ||
 798             inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
 799                 fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
 800
 801         ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
 802                                 inode->i_extra_isize);
 803         if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
 804                 return;
 805
 806         start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
 807         end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
 808
 809         update_xattr_entry_hashes(ctx->fs, start, end);
 810 }
 811
 812 static void update_block_xattr_hashes(struct rewrite_context *ctx,
 813                                       char *block_buf)
 814 {
 815         struct ext2_ext_attr_header *header;
 816         struct ext2_ext_attr_entry *start, *end;
 817
 818         header = (struct ext2_ext_attr_header *)block_buf;
 819         if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
 820                 return;
 821
 822         start = (struct ext2_ext_attr_entry *)(header+1);
 823         end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
 824
 825         if (update_xattr_entry_hashes(ctx->fs, start, end))
 826                 ext2fs_ext_attr_block_rehash(header, end);
 827 }
 828
 829 static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
 830                               struct ext2_inode *inode)
 831 {
 832         blk64_t file_acl_block;
 833         errcode_t retval;
 834
 835         if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
 836                 if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
 837                         return;
 838                 memset(inode, 0, ctx->inode_size);
 839         }
 840
 841         if (inode->i_flags & EXT4_EA_INODE_FL)
 842                 update_ea_inode_hash(ctx, ino, inode);
 843
 844         if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
 845                 update_inline_xattr_hashes(ctx,
 846                                            (struct ext2_inode_large *)inode);
 847
 848         retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
 849         if (retval)
 850                 fatal_err(retval, "while writing inode");
 851
 852         retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
 853         if (retval)
 854                 fatal_err(retval, "while rewriting extents");
 855
 856         if (LINUX_S_ISDIR(inode->i_mode) &&
 857             ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
 858                 retval = rewrite_directory(ctx->fs, ino, inode);
 859                 if (retval)
 860                         fatal_err(retval, "while rewriting directories");
 861         }
 862
 863         file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
 864         if (!file_acl_block)
 865                 return;
 866
 867         retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 868                                        ino);
 869         if (retval)
 870                 fatal_err(retval, "while rewriting extended attribute");
 871
 872         update_block_xattr_hashes(ctx, ctx->ea_buf);
 873         retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
 874                                         ino);
 875         if (retval)
 876                 fatal_err(retval, "while rewriting extended attribute");
 877 }
 878
 879 #define REWRITE_EA_FL           0x01    /* Rewrite EA inodes */
 880 #define REWRITE_DIR_FL          0x02    /* Rewrite directories */
 881 #define REWRITE_NONDIR_FL       0x04    /* Rewrite other inodes */
 882 #define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
 883
 884 static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
 885 {
 886         ext2_inode_scan scan;
 887         errcode_t       retval;
 888         ext2_ino_t      ino;
 889         struct ext2_inode *inode;
 890         int rewrite;
 891
 892         retval = ext2fs_get_mem(ctx->inode_size, &inode);
 893         if (retval)
 894                 fatal_err(retval, "while allocating memory");
 895
 896         retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
 897         if (retval)
 898                 fatal_err(retval, "while opening inode scan");
 899
 900         do {
 901                 retval = ext2fs_get_next_inode_full(scan, &ino, inode,
 902                                                     ctx->inode_size);
 903                 if (retval)
 904                         fatal_err(retval, "while getting next inode");
 905                 if (!ino)
 906                         break;
 907
 908                 rewrite = 0;
 909                 if (inode->i_flags & EXT4_EA_INODE_FL) {
 910                         if (flags & REWRITE_EA_FL)
 911                                 rewrite = 1;
 912                 } else if (LINUX_S_ISDIR(inode->i_mode)) {
 913                         if (flags & REWRITE_DIR_FL)
 914                                 rewrite = 1;
 915                 } else {
 916                         if (flags & REWRITE_NONDIR_FL)
 917                                 rewrite = 1;
 918                 }
 919                 if (rewrite)
 920                         rewrite_one_inode(ctx, ino, inode);
 921         } while (ino);
 922         ext2fs_close_inode_scan(scan);
 923         ext2fs_free_mem(&inode);
 924 }
 925
 926 /*
 927  * Forcibly rewrite checksums in inodes specified by 'flags'
 928  */
 929 static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
 930 {
 931         struct rewrite_context ctx = {
 932                 .fs = fs,
 933                 .inode_size = EXT2_INODE_SIZE(fs->super),
 934         };
 935         errcode_t retval;
 936
 937         if (fs->super->s_creator_os == EXT2_OS_HURD)
 938                 return;
 939
 940         retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
 941         if (retval)
 942                 fatal_err(retval, "while allocating memory");
 943
 944         retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
 945         if (retval)
 946                 fatal_err(retval, "while allocating memory");
 947
 948         /*
 949          * Extended attribute inodes have a lookup hash that needs to be
 950          * recalculated with the new csum_seed. Other inodes referencing xattr
 951          * inodes need this value to be up to date. That's why we do two passes:
 952          *
 953          * pass 1: update xattr inodes to update their lookup hash as well as
 954          *         other checksums.
 955          *
 956          * pass 2: go over other inodes to update their checksums.
 957          */
 958         if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
 959                 rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
 960         flags &= ~REWRITE_EA_FL;
 961         rewrite_inodes_pass(&ctx, flags);
 962
 963         ext2fs_free_mem(&ctx.zero_inode);
 964         ext2fs_free_mem(&ctx.ea_buf);
 965 }
 966
 967 static errcode_t rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 968 {
 969         errcode_t retval;
 970         dgrp_t i;
 971
 972         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 973         ext2fs_init_csum_seed(fs);
 974         for (i = 0; i < fs->group_desc_count; i++)
 975                 ext2fs_group_desc_csum_set(fs, i);
 976         retval = ext2fs_read_bitmaps(fs);
 977         if (retval)
 978                 fatal_err(retval, "while reading bitmaps");
 979         rewrite_inodes(fs, flags);
 980         ext2fs_mark_ib_dirty(fs);
 981         ext2fs_mark_bb_dirty(fs);
 982         retval = ext2fs_mmp_update2(fs, 1);
 983         if (retval)
 984                 return retval;
 985         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 986         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 987         if (ext2fs_has_feature_metadata_csum(fs->super))
 988                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 989         else
 990                 fs->super->s_checksum_type = 0;
 991         ext2fs_mark_super_dirty(fs);
 992         return 0;
 993 }
 994
 995 static void enable_uninit_bg(ext2_filsys fs)
 996 {
 997         struct ext2_group_desc *gd;
 998         dgrp_t i;
 999
1000         for (i = 0; i < fs->group_desc_count; i++) {
1001                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1002                 gd->bg_itable_unused = 0;
1003                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
1004                 ext2fs_group_desc_csum_set(fs, i);
1005         }
1006         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1007 }
1008
1009 static errcode_t zero_empty_inodes(ext2_filsys fs)
1010 {
1011         int length = EXT2_INODE_SIZE(fs->super);
1012         struct ext2_inode *inode = NULL;
1013         ext2_inode_scan scan;
1014         errcode_t       retval;
1015         ext2_ino_t      ino;
1016
1017         retval = ext2fs_open_inode_scan(fs, 0, &scan);
1018         if (retval)
1019                 goto out;
1020
1021         retval = ext2fs_get_mem(length, &inode);
1022         if (retval)
1023                 goto out;
1024
1025         do {
1026                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
1027                 if (retval)
1028                         goto out;
1029                 if (!ino)
1030                         break;
1031                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
1032                         memset(inode, 0, length);
1033                         retval = ext2fs_write_inode_full(fs, ino, inode,
1034                                                          length);
1035                         if (retval)
1036                                 goto out;
1037                 }
1038         } while (1);
1039
1040 out:
1041         ext2fs_free_mem(&inode);
1042         ext2fs_close_inode_scan(scan);
1043         return retval;
1044 }
1045
1046 static int has_casefold_inode(ext2_filsys fs)
1047 {
1048         int length = EXT2_INODE_SIZE(fs->super);
1049         struct ext2_inode *inode = NULL;
1050         ext2_inode_scan scan;
1051         errcode_t       retval;
1052         ext2_ino_t      ino;
1053         int found_casefold = 0;
1054
1055         retval = ext2fs_get_mem(length, &inode);
1056         if (retval)
1057                 fatal_err(retval, "while allocating memory");
1058
1059         retval = ext2fs_open_inode_scan(fs, 0, &scan);
1060         if (retval)
1061                 fatal_err(retval, "while opening inode scan");
1062
1063         do {
1064                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
1065                 if (retval)
1066                         fatal_err(retval, "while getting next inode");
1067                 if (!ino)
1068                         break;
1069
1070                 if(inode->i_flags & EXT4_CASEFOLD_FL) {
1071                         found_casefold = 1;
1072                         break;
1073                 }
1074         } while(1);
1075
1076         ext2fs_free_mem(&inode);
1077         ext2fs_close_inode_scan(scan);
1078         return found_casefold;
1079 }
1080
1081 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
1082 {
1083         struct ext2_group_desc *gd;
1084         dgrp_t i;
1085         errcode_t retval;
1086         blk64_t b, c, d;
1087
1088         /* Load bitmaps to ensure that the uninit ones get written out */
1089         fs->super->s_feature_ro_compat |= csum_feature_flag;
1090         retval = ext2fs_read_bitmaps(fs);
1091         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
1092         if (retval) {
1093                 com_err("disable_uninit_bg", retval,
1094                         "while reading bitmaps");
1095                 request_fsck_afterwards(fs);
1096                 return retval;
1097         }
1098         ext2fs_mark_ib_dirty(fs);
1099         ext2fs_mark_bb_dirty(fs);
1100
1101         /* If we're only turning off uninit_bg, zero the inodes */
1102         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
1103                 retval = zero_empty_inodes(fs);
1104                 if (retval) {
1105                         com_err("disable_uninit_bg", retval,
1106                                 "while zeroing unused inodes");
1107                         request_fsck_afterwards(fs);
1108                         return retval;
1109                 }
1110         }
1111
1112         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
1113         for (i = 0; i < fs->group_desc_count; i++) {
1114                 b = ext2fs_block_bitmap_loc(fs, i);
1115                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1116                 b = ext2fs_inode_bitmap_loc(fs, i);
1117                 ext2fs_mark_block_bitmap2(fs->block_map, b);
1118
1119                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
1120                 if (retval == 0 && b)
1121                         ext2fs_mark_block_bitmap2(fs->block_map, b);
1122                 if (retval == 0 && c)
1123                         ext2fs_mark_block_bitmap2(fs->block_map, c);
1124                 if (retval == 0 && d)
1125                         ext2fs_mark_block_bitmap2(fs->block_map, d);
1126                 if (retval) {
1127                         com_err("disable_uninit_bg", retval,
1128                                 "while initializing block bitmaps");
1129                         request_fsck_afterwards(fs);
1130                 }
1131
1132                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
1133                 gd->bg_itable_unused = 0;
1134                 gd->bg_flags = 0;
1135                 ext2fs_group_desc_csum_set(fs, i);
1136         }
1137         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1138         ext2fs_mark_super_dirty(fs);
1139
1140         return 0;
1141 }
1142
1143 static void
1144 try_confirm_csum_seed_support(void)
1145 {
1146         if (access("/sys/fs/ext4/features/metadata_csum_seed", R_OK))
1147                 fputs(_("WARNING: Could not confirm kernel support for "
1148                         "metadata_csum_seed.\n  This requires Linux >= "
1149                         "v4.4.\n"), stderr);
1150 }
1151
1152 /*
1153  * Update the feature set as provided by the user.
1154  */
1155 static int update_feature_set(ext2_filsys fs, char *features)
1156 {
1157         struct ext2_super_block *sb = fs->super;
1158         __u32           old_features[3];
1159         int             type_err;
1160         unsigned int    mask_err;
1161         errcode_t       err;
1162         enum quota_type qtype;
1163
1164 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
1165                                 ((&sb->s_feature_compat)[(type)] & (mask)))
1166 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
1167                                  !((&sb->s_feature_compat)[(type)] & (mask)))
1168 #define FEATURE_CHANGED(type, mask) ((mask) & \
1169                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
1170
1171         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
1172         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
1173         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
1174
1175         if (e2p_edit_feature2(features, &sb->s_feature_compat,
1176                               ok_features, clear_ok_features,
1177                               &type_err, &mask_err)) {
1178                 if (!mask_err)
1179                         fprintf(stderr,
1180                                 _("Invalid filesystem option set: %s\n"),
1181                                 features);
1182                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
1183                         fprintf(stderr, _("Clearing filesystem feature '%s' "
1184                                           "not supported.\n"),
1185                                 e2p_feature2string(type_err &
1186                                                    E2P_FEATURE_TYPE_MASK,
1187                                                    mask_err));
1188                 else
1189                         fprintf(stderr, _("Setting filesystem feature '%s' "
1190                                           "not supported.\n"),
1191                                 e2p_feature2string(type_err, mask_err));
1192                 return 1;
1193         }
1194
1195         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1196                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1197                     !(mount_flags & EXT2_MF_READONLY)) {
1198                         fputs(_("The has_journal feature may only be "
1199                                 "cleared when the filesystem is\n"
1200                                 "unmounted or mounted "
1201                                 "read-only.\n"), stderr);
1202                         return 1;
1203                 }
1204                 if (ext2fs_has_feature_journal_needs_recovery(sb) &&
1205                     f_flag < 2) {
1206                         fputs(_("The needs_recovery flag is set.  "
1207                                 "Please run e2fsck before clearing\n"
1208                                 "the has_journal flag.\n"), stderr);
1209                         return 1;
1210                 }
1211                 if (sb->s_journal_inum) {
1212                         if (remove_journal_inode(fs))
1213                                 return 1;
1214                 }
1215                 if (sb->s_journal_dev) {
1216                         if (remove_journal_device(fs))
1217                                 return 1;
1218                 }
1219         }
1220
1221         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
1222                 ext2_ino_t ino;
1223
1224                 if (mount_flags & EXT2_MF_MOUNTED) {
1225                         fputs(_("The orphan_file feature may only be cleared "
1226                                 "when the filesystem is unmounted.\n"), stderr);
1227                         return 1;
1228                 }
1229                 if (ext2fs_has_feature_orphan_present(sb) && f_flag < 2) {
1230                         fputs(_("The orphan_present feature is set. Please "
1231                                 "run e2fsck before clearing orphan_file "
1232                                 "feature.\n"),
1233                               stderr);
1234                         return 1;
1235                 }
1236                 err = ext2fs_read_bitmaps(fs);
1237                 if (err) {
1238                         com_err(program_name, err, "%s",
1239                                 _("while loading bitmaps"));
1240                         return 1;
1241                 }
1242                 err = ext2fs_truncate_orphan_file(fs);
1243                 if (err) {
1244                         com_err(program_name, err,
1245                                 _("\n\twhile trying to delete orphan file\n"));
1246                         return 1;
1247                 }
1248                 ino = sb->s_orphan_file_inum;
1249                 sb->s_orphan_file_inum = 0;
1250                 ext2fs_inode_alloc_stats2(fs, ino, -1, 0);
1251                 ext2fs_clear_feature_orphan_file(sb);
1252                 ext2fs_clear_feature_orphan_present(sb);
1253                 ext2fs_mark_super_dirty(fs);
1254         }
1255
1256         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
1257                 if (!ext2fs_has_feature_journal(sb)) {
1258                         fputs(_("orphan_file feature can be set only for "
1259                                 "filesystems with journal.\n"), stderr);
1260                         return 1;
1261                 }
1262                 /*
1263                  * If adding an orphan file, let the create orphan file
1264                  * code below handle setting the flag and creating it.
1265                  * We supply a default size if necessary.
1266                  */
1267                 orphan_file_blocks = ext2fs_default_orphan_file_blocks(fs);
1268                 ext2fs_set_feature_orphan_file(sb);
1269         }
1270
1271         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1272                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1273                 if (ext2fs_has_feature_meta_bg(sb)) {
1274                         fputs(_("Setting filesystem feature 'sparse_super' "
1275                                 "not supported\nfor filesystems with "
1276                                 "the meta_bg feature enabled.\n"),
1277                                 stderr);
1278                         return 1;
1279                 }
1280         }
1281
1282         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1283                 int error;
1284
1285                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1286                     (mount_flags & EXT2_MF_READONLY)) {
1287                         fputs(_("The multiple mount protection feature can't\n"
1288                                 "be set if the filesystem is mounted or\n"
1289                                 "read-only.\n"), stderr);
1290                         return 1;
1291                 }
1292
1293                 error = ext2fs_mmp_init(fs);
1294                 if (error) {
1295                         fputs(_("\nError while enabling multiple mount "
1296                                 "protection feature."), stderr);
1297                         return 1;
1298                 }
1299
1300                 /*
1301                  * We want to update group desc with the new free blocks count
1302                  */
1303                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1304
1305                 printf(_("Multiple mount protection has been enabled "
1306                          "with update interval %ds.\n"),
1307                        sb->s_mmp_update_interval);
1308         }
1309
1310         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1311                 int error;
1312
1313                 if (mount_flags & EXT2_MF_READONLY) {
1314                         fputs(_("The multiple mount protection feature cannot\n"
1315                                 "be disabled if the filesystem is readonly.\n"),
1316                                 stderr);
1317                         return 1;
1318                 }
1319
1320                 error = ext2fs_read_bitmaps(fs);
1321                 if (error) {
1322                         fputs(_("Error while reading bitmaps\n"), stderr);
1323                         return 1;
1324                 }
1325
1326                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1327                 if (error) {
1328                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1329
1330                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1331                                 printf(_("Magic number in MMP block does not "
1332                                          "match. expected: %x, actual: %x\n"),
1333                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1334                         else
1335                                 com_err(program_name, error, "%s",
1336                                         _("while reading MMP block."));
1337                         goto mmp_error;
1338                 }
1339
1340                 /* We need to force out the group descriptors as well */
1341                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1342                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1343 mmp_error:
1344                 sb->s_mmp_block = 0;
1345                 sb->s_mmp_update_interval = 0;
1346         }
1347
1348         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1349                 /*
1350                  * If adding a journal flag, let the create journal
1351                  * code below handle setting the flag and creating the
1352                  * journal.  We supply a default size if necessary.
1353                  */
1354                 if (!journal_size)
1355                         journal_size = -1;
1356                 ext2fs_clear_feature_journal(sb);
1357         }
1358
1359         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1360                 if (!sb->s_def_hash_version)
1361                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1362                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1363                         uuid_generate((unsigned char *) sb->s_hash_seed);
1364         }
1365
1366         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
1367             ext2fs_has_feature_metadata_csum(sb)) {
1368                 if (check_fsck_needed(fs,
1369                         _("Disabling directory index on filesystem with "
1370                           "checksums could take some time.")))
1371                         return 1;
1372                 if (mount_flags & EXT2_MF_MOUNTED) {
1373                         fputs(_("Cannot disable dir_index on a mounted "
1374                                 "filesystem!\n"), stderr);
1375                         exit(1);
1376                 }
1377                 /*
1378                  * Clearing dir_index on checksummed filesystem requires
1379                  * rewriting all directories to update checksums.
1380                  */
1381                 rewrite_checksums |= REWRITE_DIR_FL;
1382         }
1383
1384         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1385                 if (ext2fs_check_desc(fs)) {
1386                         fputs(_("Clearing the flex_bg flag would "
1387                                 "cause the the filesystem to be\n"
1388                                 "inconsistent.\n"), stderr);
1389                         return 1;
1390                 }
1391         }
1392
1393         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1394                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1395                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1396                     !(mount_flags & EXT2_MF_READONLY)) {
1397                         fputs(_("The huge_file feature may only be "
1398                                 "cleared when the filesystem is\n"
1399                                 "unmounted or mounted "
1400                                 "read-only.\n"), stderr);
1401                         return 1;
1402                 }
1403         }
1404
1405         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1406                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1407                 if (check_fsck_needed(fs,
1408                         _("Enabling checksums could take some time.")))
1409                         return 1;
1410                 if (mount_flags & EXT2_MF_MOUNTED) {
1411                         fputs(_("Cannot enable metadata_csum on a mounted "
1412                                 "filesystem!\n"), stderr);
1413                         return 1;
1414                 }
1415                 if (!ext2fs_has_feature_extents(fs->super))
1416                         printf("%s",
1417                                _("Extents are not enabled.  The file extent "
1418                                  "tree can be checksummed, whereas block maps "
1419                                  "cannot.  Not enabling extents reduces the "
1420                                  "coverage of metadata checksumming.  "
1421                                  "Re-run with -O extent to rectify.\n"));
1422                 if (!ext2fs_has_feature_64bit(fs->super))
1423                         printf("%s",
1424                                _("64-bit filesystem support is not enabled.  "
1425                                  "The larger fields afforded by this feature "
1426                                  "enable full-strength checksumming.  "
1427                                  "Run resize2fs -b to rectify.\n"));
1428                 rewrite_checksums = REWRITE_ALL;
1429                 /* metadata_csum supersedes uninit_bg */
1430                 ext2fs_clear_feature_gdt_csum(fs->super);
1431
1432                 /* if uninit_bg was previously off, rewrite group desc */
1433                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1434                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1435                         enable_uninit_bg(fs);
1436
1437                 /*
1438                  * Since metadata_csum supersedes uninit_bg, pretend like
1439                  * uninit_bg has been off all along.
1440                  */
1441                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1442                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1443         }
1444
1445         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1446                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1447                 __u32   test_features[3];
1448
1449                 if (check_fsck_needed(fs,
1450                         _("Disabling checksums could take some time.")))
1451                         return 1;
1452                 if (mount_flags & EXT2_MF_MOUNTED) {
1453                         fputs(_("Cannot disable metadata_csum on a mounted "
1454                                 "filesystem!\n"), stderr);
1455                         return 1;
1456                 }
1457                 rewrite_checksums = REWRITE_ALL;
1458
1459                 /* Enable uninit_bg unless the user expressly turned it off */
1460                 memcpy(test_features, old_features, sizeof(test_features));
1461                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1462                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1463                 e2p_edit_feature2(features, test_features, ok_features,
1464                                   clear_ok_features, NULL, NULL);
1465                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1466                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1467                         ext2fs_set_feature_gdt_csum(fs->super);
1468
1469                 /*
1470                  * If we're turning off metadata_csum and not turning on
1471                  * uninit_bg, rewrite group desc.
1472                  */
1473                 if (!ext2fs_has_feature_gdt_csum(fs->super)) {
1474                         err = disable_uninit_bg(fs,
1475                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1476                         if (err)
1477                                 return 1;
1478                 } else
1479                         /*
1480                          * metadata_csum previously provided uninit_bg, so if
1481                          * we're also setting the uninit_bg feature bit,
1482                          * pretend like it was previously enabled.  Checksums
1483                          * will be rewritten with crc16 later.
1484                          */
1485                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1486                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1487                 fs->super->s_checksum_seed = 0;
1488                 ext2fs_clear_feature_csum_seed(fs->super);
1489         }
1490
1491         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1492                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1493                 if (mount_flags & EXT2_MF_MOUNTED) {
1494                         fputs(_("Cannot enable uninit_bg on a mounted "
1495                                 "filesystem!\n"), stderr);
1496                         return 1;
1497                 }
1498
1499                 /* Do not enable uninit_bg when metadata_csum enabled */
1500                 if (ext2fs_has_feature_metadata_csum(fs->super))
1501                         ext2fs_clear_feature_gdt_csum(fs->super);
1502                 else
1503                         enable_uninit_bg(fs);
1504         }
1505
1506         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1507                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1508                 if (mount_flags & EXT2_MF_MOUNTED) {
1509                         fputs(_("Cannot disable uninit_bg on a mounted "
1510                                 "filesystem!\n"), stderr);
1511                         return 1;
1512                 }
1513
1514                 err = disable_uninit_bg(fs,
1515                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1516                 if (err)
1517                         return 1;
1518         }
1519
1520         /*
1521          * We don't actually toggle 64bit; resize2fs does that.  But this
1522          * must come after the metadata_csum feature_on so that it won't
1523          * complain about the lack of 64bit.
1524          */
1525         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1526                        EXT4_FEATURE_INCOMPAT_64BIT)) {
1527                 if (mount_flags & EXT2_MF_MOUNTED) {
1528                         fprintf(stderr, _("Cannot enable 64-bit mode "
1529                                           "while mounted!\n"));
1530                         return 1;
1531                 }
1532                 ext2fs_clear_feature_64bit(sb);
1533                 feature_64bit = 1;
1534         }
1535         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1536                         EXT4_FEATURE_INCOMPAT_64BIT)) {
1537                 if (mount_flags & EXT2_MF_MOUNTED) {
1538                         fprintf(stderr, _("Cannot disable 64-bit mode "
1539                                           "while mounted!\n"));
1540                         return 1;
1541                 }
1542                 ext2fs_set_feature_64bit(sb);
1543                 feature_64bit = -1;
1544         }
1545
1546         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1547                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1548                 /*
1549                  * Set the Q_flag here and handle the quota options in the code
1550                  * below.
1551                  */
1552                 if (!Q_flag) {
1553                         Q_flag = 1;
1554                         /* Enable usr/grp quota by default */
1555                         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1556                                 if (qtype != PRJQUOTA)
1557                                         quota_enable[qtype] = QOPT_ENABLE;
1558                                 else
1559                                         quota_enable[qtype] = QOPT_DISABLE;
1560                         }
1561                 }
1562                 ext2fs_clear_feature_quota(sb);
1563         }
1564
1565         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1566                        EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1567                 if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1568                         fprintf(stderr, _("Cannot enable project feature; "
1569                                           "inode size too small.\n"));
1570                         return 1;
1571                 }
1572                 Q_flag = 1;
1573                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1574         }
1575
1576         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1577                         EXT4_FEATURE_RO_COMPAT_PROJECT)) {
1578                 Q_flag = 1;
1579                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1580         }
1581
1582         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1583                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1584                 /*
1585                  * Set the Q_flag here and handle the quota options in the code
1586                  * below.
1587                  */
1588                 if (Q_flag)
1589                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1590                                 "arguments.\n"), stderr);
1591                 Q_flag = 1;
1592                 /* Disable all quota by default */
1593                 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1594                         quota_enable[qtype] = QOPT_DISABLE;
1595         }
1596
1597         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
1598                 fs->super->s_encrypt_algos[0] =
1599                         EXT4_ENCRYPTION_MODE_AES_256_XTS;
1600                 fs->super->s_encrypt_algos[1] =
1601                         EXT4_ENCRYPTION_MODE_AES_256_CTS;
1602         }
1603
1604         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1605                 if (mount_flags & EXT2_MF_MOUNTED) {
1606                         fputs(_("The casefold feature may only be enabled when "
1607                                 "the filesystem is unmounted.\n"), stderr);
1608                         return 1;
1609                 }
1610                 fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
1611                 fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
1612                 enabling_casefold = 1;
1613         }
1614
1615         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
1616                 if (mount_flags & EXT2_MF_MOUNTED) {
1617                         fputs(_("The casefold feature may only be disabled when "
1618                                 "the filesystem is unmounted.\n"), stderr);
1619                         return 1;
1620                 }
1621                 if (has_casefold_inode(fs)) {
1622                         fputs(_("The casefold feature can't be cleared when "
1623                                         "there are inodes with +F flag.\n"), stderr);
1624                         return 1;
1625                 }
1626                 fs->super->s_encoding = 0;
1627                 fs->super->s_encoding_flags = 0;
1628                 enabling_casefold = 0;
1629         }
1630
1631         if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
1632                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1633                 if (!ext2fs_has_feature_metadata_csum(sb)) {
1634                         fputs(_("Setting feature 'metadata_csum_seed' "
1635                                 "is only supported\non filesystems with "
1636                                 "the metadata_csum feature enabled.\n"),
1637                                 stderr);
1638                         return 1;
1639                 }
1640                 try_confirm_csum_seed_support();
1641                 fs->super->s_checksum_seed = fs->csum_seed;
1642         }
1643
1644         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT,
1645                 EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
1646                 __le32 uuid_seed;
1647
1648                 uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
1649                                         sizeof(fs->super->s_uuid));
1650                 if (fs->super->s_checksum_seed != uuid_seed) {
1651                         if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
1652                                 fputs(_("UUID has changed since enabling "
1653                 "metadata_csum.  Filesystem must be unmounted "
1654                 "\nto safely rewrite all metadata to match the new UUID.\n"),
1655                                       stderr);
1656                                 return 1;
1657                         }
1658                         if (check_fsck_needed(fs, _("Recalculating checksums "
1659                                                     "could take some time.")))
1660                                 return 1;
1661                         rewrite_checksums = REWRITE_ALL;
1662                 }
1663         }
1664
1665         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1666             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1667              sb->s_feature_incompat))
1668                 ext2fs_update_dynamic_rev(fs);
1669
1670         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1671                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1672             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1673                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1674             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1675                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1676             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1677                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1678             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1679                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1680                 request_fsck_afterwards(fs);
1681
1682         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1683             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1684             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1685                 ext2fs_mark_super_dirty(fs);
1686
1687         return 0;
1688 }
1689
1690 /*
1691  * Add a journal to the filesystem.
1692  */
1693 static int add_journal(ext2_filsys fs)
1694 {
1695         struct ext2fs_journal_params    jparams;
1696         errcode_t       retval;
1697         ext2_filsys     jfs;
1698         io_manager      io_ptr;
1699
1700         if (ext2fs_has_feature_journal(fs->super)) {
1701                 fputs(_("The filesystem already has a journal.\n"), stderr);
1702                 goto err;
1703         }
1704         if (journal_device) {
1705                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1706                                         NULL))
1707                         proceed_question(-1);
1708                 check_mount(journal_device, 0, _("journal"));
1709 #ifdef CONFIG_TESTIO_DEBUG
1710                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1711                         io_ptr = test_io_manager;
1712                         test_io_backing_manager = unix_io_manager;
1713                 } else
1714 #endif
1715                         io_ptr = unix_io_manager;
1716                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1717                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1718                                      fs->blocksize, io_ptr, &jfs);
1719                 if (retval) {
1720                         com_err(program_name, retval,
1721                                 _("\n\twhile trying to open journal on %s\n"),
1722                                 journal_device);
1723                         goto err;
1724                 }
1725                 printf(_("Creating journal on device %s: "),
1726                        journal_device);
1727                 fflush(stdout);
1728
1729                 retval = ext2fs_add_journal_device(fs, jfs);
1730                 ext2fs_close_free(&jfs);
1731                 if (retval) {
1732                         com_err(program_name, retval,
1733                                 _("while adding filesystem to journal on %s"),
1734                                 journal_device);
1735                         goto err;
1736                 }
1737                 fputs(_("done\n"), stdout);
1738         } else if (journal_size) {
1739                 fputs(_("Creating journal inode: "), stdout);
1740                 fflush(stdout);
1741                 figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
1742
1743                 if (journal_location_string)
1744                         journal_location =
1745                                 parse_num_blocks2(journal_location_string,
1746                                                   fs->super->s_log_block_size);
1747                 retval = ext2fs_add_journal_inode3(fs, &jparams,
1748                                                    journal_location,
1749                                                    journal_flags);
1750                 if (retval) {
1751                         fprintf(stderr, "\n");
1752                         com_err(program_name, retval, "%s",
1753                                 _("\n\twhile trying to create journal file"));
1754                         return retval;
1755                 }
1756                 fs->super->s_overhead_clusters += EXT2FS_NUM_B2C(fs,
1757                         jparams.num_journal_blocks + jparams.num_fc_blocks);
1758                 ext2fs_mark_super_dirty(fs);
1759                 fputs(_("done\n"), stdout);
1760
1761                 /*
1762                  * If the filesystem wasn't mounted, we need to force
1763                  * the block group descriptors out.
1764                  */
1765                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1766                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1767         }
1768         print_check_message(fs->super->s_max_mnt_count,
1769                             fs->super->s_checkinterval);
1770         return 0;
1771
1772 err:
1773         free(journal_device);
1774         return 1;
1775 }
1776
1777 static int handle_quota_options(ext2_filsys fs)
1778 {
1779         errcode_t retval;
1780         quota_ctx_t qctx;
1781         ext2_ino_t qf_ino;
1782         enum quota_type qtype;
1783         unsigned int qtype_bits = 0;
1784         int need_dirty = 0;
1785
1786         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1787                 if (quota_enable[qtype] != 0)
1788                         break;
1789         if (qtype == MAXQUOTAS)
1790                 /* Nothing to do. */
1791                 return 0;
1792
1793         if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
1794             fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
1795                 fprintf(stderr, _("Cannot enable project quota; "
1796                                   "inode size too small.\n"));
1797                 return 1;
1798         }
1799
1800         for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1801                 if (quota_enable[qtype] == QOPT_ENABLE)
1802                         qtype_bits |= 1 << qtype;
1803         }
1804
1805         retval = quota_init_context(&qctx, fs, qtype_bits);
1806         if (retval) {
1807                 com_err(program_name, retval,
1808                         _("while initializing quota context in support library"));
1809                 return 1;
1810         }
1811
1812         if (qtype_bits)
1813                 quota_compute_usage(qctx);
1814
1815         for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
1816                 if (quota_enable[qtype] == QOPT_ENABLE &&
1817                     *quota_sb_inump(fs->super, qtype) == 0) {
1818                         if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
1819                                 retval = quota_read_all_dquots(qctx, qf_ino,
1820                                                                qtype,
1821                                                                QREAD_LIMITS);
1822                                 if (retval) {
1823                                         com_err(program_name, retval,
1824                                                 _("while updating quota limits (%d)"),
1825                                                 qtype);
1826                                 quota_errout:
1827                                         quota_release_context(&qctx);
1828                                         return 1;
1829                                 }
1830                         }
1831                         retval = quota_write_inode(qctx, 1 << qtype);
1832                         if (retval) {
1833                                 com_err(program_name, retval,
1834                                         _("while writing quota file (%d)"),
1835                                         qtype);
1836                                 goto quota_errout;
1837                         }
1838                         /* Enable Quota feature if one of quota enabled */
1839                         if (!ext2fs_has_feature_quota(fs->super)) {
1840                                 ext2fs_set_feature_quota(fs->super);
1841                                 need_dirty = 1;
1842                         }
1843                         if (qtype == PRJQUOTA &&
1844                             !ext2fs_has_feature_project(fs->super)) {
1845                                 ext2fs_set_feature_project(fs->super);
1846                                 need_dirty = 1;
1847                         }
1848                 } else if (quota_enable[qtype] == QOPT_DISABLE) {
1849                         retval = quota_remove_inode(fs, qtype);
1850                         if (retval) {
1851                                 com_err(program_name, retval,
1852                                         _("while removing quota file (%d)"),
1853                                         qtype);
1854                                 goto quota_errout;
1855                         }
1856                         if (qtype == PRJQUOTA) {
1857                                 ext2fs_clear_feature_project(fs->super);
1858                                 need_dirty = 1;
1859                         }
1860                 }
1861         }
1862
1863         quota_release_context(&qctx);
1864         /* Clear Quota feature if all quota types disabled. */
1865         if (!qtype_bits) {
1866                 for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
1867                         if (*quota_sb_inump(fs->super, qtype))
1868                                 break;
1869                 if (qtype == MAXQUOTAS) {
1870                         ext2fs_clear_feature_quota(fs->super);
1871                         need_dirty = 1;
1872                 }
1873
1874         }
1875         if (need_dirty)
1876                 ext2fs_mark_super_dirty(fs);
1877         return 0;
1878 }
1879
1880 static int option_handle_function(char *token)
1881 {
1882         if (strncmp(token, "usr", 3) == 0) {
1883                 quota_enable[USRQUOTA] = QOPT_ENABLE;
1884         } else if (strncmp(token, "^usr", 4) == 0) {
1885                 quota_enable[USRQUOTA] = QOPT_DISABLE;
1886         } else if (strncmp(token, "grp", 3) == 0) {
1887                 quota_enable[GRPQUOTA] = QOPT_ENABLE;
1888         } else if (strncmp(token, "^grp", 4) == 0) {
1889                 quota_enable[GRPQUOTA] = QOPT_DISABLE;
1890         } else if (strncmp(token, "prj", 3) == 0) {
1891                 quota_enable[PRJQUOTA] = QOPT_ENABLE;
1892         } else if (strncmp(token, "^prj", 4) == 0) {
1893                 quota_enable[PRJQUOTA] = QOPT_DISABLE;
1894         } else {
1895                 fputs(_("\nBad quota options specified.\n\n"
1896                         "Following valid quota options are available "
1897                         "(pass by separating with comma):\n"
1898                         "\t[^]usr[quota]\n"
1899                         "\t[^]grp[quota]\n"
1900                         "\t[^]prj[quota]\n"
1901                         "\n\n"), stderr);
1902                 return 1;
1903         }
1904         return 0;
1905 }
1906
1907 static void parse_e2label_options(int argc, char ** argv)
1908 {
1909         if ((argc < 2) || (argc > 3)) {
1910                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1911                 exit(1);
1912         }
1913         io_options = strchr(argv[1], '?');
1914         if (io_options)
1915                 *io_options++ = 0;
1916         device_name = get_devname(NULL, argv[1], NULL);
1917         if (!device_name) {
1918                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1919                         argv[1]);
1920                 exit(1);
1921         }
1922         open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
1923         if (argc == 3) {
1924                 open_flag |= EXT2_FLAG_RW;
1925                 L_flag = 1;
1926                 new_label = argv[2];
1927         } else
1928                 print_label++;
1929 }
1930
1931 static time_t parse_time(char *str)
1932 {
1933         struct  tm      ts;
1934
1935         if (strcmp(str, "now") == 0) {
1936                 return (time(0));
1937         }
1938         memset(&ts, 0, sizeof(ts));
1939 #ifdef HAVE_STRPTIME
1940         strptime(str, "%Y%m%d%H%M%S", &ts);
1941 #else
1942         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1943                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1944         ts.tm_year -= 1900;
1945         ts.tm_mon -= 1;
1946         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1947             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1948             ts.tm_min > 59 || ts.tm_sec > 61)
1949                 ts.tm_mday = 0;
1950 #endif
1951         if (ts.tm_mday == 0) {
1952                 com_err(program_name, 0,
1953                         _("Couldn't parse date/time specifier: %s"),
1954                         str);
1955                 usage();
1956         }
1957         ts.tm_isdst = -1;
1958         return (mktime(&ts));
1959 }
1960
1961 static void parse_tune2fs_options(int argc, char **argv)
1962 {
1963         int c;
1964         char *tmp;
1965         struct group *gr;
1966         struct passwd *pw;
1967         int ret;
1968         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:z:Q:";
1969
1970         open_flag = 0;
1971         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1972         while ((c = getopt(argc, argv, optstring)) != EOF)
1973                 switch (c) {
1974                 case 'c':
1975                         open_flag = EXT2_FLAG_RW;
1976                         c_flag = 1;
1977                         if (strcmp(optarg, "random") == 0) {
1978                                 max_mount_count = 65536;
1979                                 break;
1980                         }
1981                         max_mount_count = strtol(optarg, &tmp, 0);
1982                         if (*tmp || max_mount_count > 16000 ||
1983                             max_mount_count < -16000) {
1984                                 com_err(program_name, 0,
1985                                         _("bad mounts count - %s"),
1986                                         optarg);
1987                                 usage();
1988                         }
1989                         if (max_mount_count == 0)
1990                                 max_mount_count = -1;
1991                         break;
1992                 case 'C':
1993                         mount_count = strtoul(optarg, &tmp, 0);
1994                         if (*tmp || mount_count > 16000) {
1995                                 com_err(program_name, 0,
1996                                         _("bad mounts count - %s"),
1997                                         optarg);
1998                                 usage();
1999                         }
2000                         C_flag = 1;
2001                         open_flag = EXT2_FLAG_RW;
2002                         break;
2003                 case 'e':
2004                         if (strcmp(optarg, "continue") == 0)
2005                                 errors = EXT2_ERRORS_CONTINUE;
2006                         else if (strcmp(optarg, "remount-ro") == 0)
2007                                 errors = EXT2_ERRORS_RO;
2008                         else if (strcmp(optarg, "panic") == 0)
2009                                 errors = EXT2_ERRORS_PANIC;
2010                         else {
2011                                 com_err(program_name, 0,
2012                                         _("bad error behavior - %s"),
2013                                         optarg);
2014                                 usage();
2015                         }
2016                         e_flag = 1;
2017                         open_flag = EXT2_FLAG_RW;
2018                         break;
2019                 case 'E':
2020                         extended_cmd = optarg;
2021                         open_flag |= EXT2_FLAG_RW;
2022                         break;
2023                 case 'f': /* Force */
2024                         f_flag++;
2025                         break;
2026                 case 'g':
2027                         resgid = strtoul(optarg, &tmp, 0);
2028                         if (*tmp) {
2029                                 gr = getgrnam(optarg);
2030                                 if (gr == NULL)
2031                                         tmp = optarg;
2032                                 else {
2033                                         resgid = gr->gr_gid;
2034                                         *tmp = 0;
2035                                 }
2036                         }
2037                         if (*tmp) {
2038                                 com_err(program_name, 0,
2039                                         _("bad gid/group name - %s"),
2040                                         optarg);
2041                                 usage();
2042                         }
2043                         g_flag = 1;
2044                         open_flag = EXT2_FLAG_RW;
2045                         break;
2046                 case 'i':
2047                         interval = strtoul(optarg, &tmp, 0);
2048                         switch (*tmp) {
2049                         case 's':
2050                                 tmp++;
2051                                 break;
2052                         case '\0':
2053                         case 'd':
2054                         case 'D': /* days */
2055                                 interval *= 86400;
2056                                 if (*tmp != '\0')
2057                                         tmp++;
2058                                 break;
2059                         case 'm':
2060                         case 'M': /* months! */
2061                                 interval *= 86400 * 30;
2062                                 tmp++;
2063                                 break;
2064                         case 'w':
2065                         case 'W': /* weeks */
2066                                 interval *= 86400 * 7;
2067                                 tmp++;
2068                                 break;
2069                         }
2070                         if (*tmp) {
2071                                 com_err(program_name, 0,
2072                                         _("bad interval - %s"), optarg);
2073                                 usage();
2074                         }
2075                         i_flag = 1;
2076                         open_flag = EXT2_FLAG_RW;
2077                         break;
2078                 case 'j':
2079                         if (!journal_size)
2080                                 journal_size = -1;
2081                         open_flag = EXT2_FLAG_RW;
2082                         break;
2083                 case 'J':
2084                         parse_journal_opts(optarg);
2085                         open_flag = EXT2_FLAG_RW;
2086                         break;
2087                 case 'l':
2088                         l_flag = 1;
2089                         break;
2090                 case 'L':
2091                         new_label = optarg;
2092                         L_flag = 1;
2093                         open_flag |= EXT2_FLAG_RW |
2094                                 EXT2_FLAG_JOURNAL_DEV_OK;
2095                         break;
2096                 case 'm':
2097                         reserved_ratio = strtod(optarg, &tmp);
2098                         if (*tmp || reserved_ratio > 50 ||
2099                             reserved_ratio < 0) {
2100                                 com_err(program_name, 0,
2101                                         _("bad reserved block ratio - %s"),
2102                                         optarg);
2103                                 usage();
2104                         }
2105                         m_flag = 1;
2106                         open_flag = EXT2_FLAG_RW;
2107                         break;
2108                 case 'M':
2109                         new_last_mounted = optarg;
2110                         M_flag = 1;
2111                         open_flag = EXT2_FLAG_RW;
2112                         break;
2113                 case 'o':
2114                         if (mntopts_cmd) {
2115                                 com_err(program_name, 0, "%s",
2116                                         _("-o may only be specified once"));
2117                                 usage();
2118                         }
2119                         mntopts_cmd = optarg;
2120                         open_flag = EXT2_FLAG_RW;
2121                         break;
2122                 case 'O':
2123                         if (features_cmd) {
2124                                 com_err(program_name, 0, "%s",
2125                                         _("-O may only be specified once"));
2126                                 usage();
2127                         }
2128                         features_cmd = optarg;
2129                         open_flag = EXT2_FLAG_RW;
2130                         break;
2131                 case 'Q':
2132                         Q_flag = 1;
2133                         ret = parse_quota_opts(optarg, option_handle_function);
2134                         if (ret)
2135                                 exit(1);
2136                         open_flag = EXT2_FLAG_RW;
2137                         break;
2138                 case 'r':
2139                         reserved_blocks = strtoul(optarg, &tmp, 0);
2140                         if (*tmp) {
2141                                 com_err(program_name, 0,
2142                                         _("bad reserved blocks count - %s"),
2143                                         optarg);
2144                                 usage();
2145                         }
2146                         r_flag = 1;
2147                         open_flag = EXT2_FLAG_RW;
2148                         break;
2149                 case 's': /* Deprecated */
2150                         s_flag = atoi(optarg);
2151                         open_flag = EXT2_FLAG_RW;
2152                         break;
2153                 case 'T':
2154                         T_flag = 1;
2155                         last_check_time = parse_time(optarg);
2156                         open_flag = EXT2_FLAG_RW;
2157                         break;
2158                 case 'u':
2159                                 resuid = strtoul(optarg, &tmp, 0);
2160                                 if (*tmp) {
2161                                         pw = getpwnam(optarg);
2162                                         if (pw == NULL)
2163                                                 tmp = optarg;
2164                                         else {
2165                                                 resuid = pw->pw_uid;
2166                                                 *tmp = 0;
2167                                         }
2168                                 }
2169                                 if (*tmp) {
2170                                         com_err(program_name, 0,
2171                                                 _("bad uid/user name - %s"),
2172                                                 optarg);
2173                                         usage();
2174                                 }
2175                                 u_flag = 1;
2176                                 open_flag = EXT2_FLAG_RW;
2177                                 break;
2178                 case 'U':
2179                         requested_uuid = optarg;
2180                         U_flag = 1;
2181                         open_flag = EXT2_FLAG_RW |
2182                                 EXT2_FLAG_JOURNAL_DEV_OK;
2183                         break;
2184                 case 'I':
2185                         new_inode_size = strtoul(optarg, &tmp, 0);
2186                         if (*tmp) {
2187                                 com_err(program_name, 0,
2188                                         _("bad inode size - %s"),
2189                                         optarg);
2190                                 usage();
2191                         }
2192                         if (!((new_inode_size &
2193                                (new_inode_size - 1)) == 0)) {
2194                                 com_err(program_name, 0,
2195                                         _("Inode size must be a "
2196                                           "power of two- %s"),
2197                                         optarg);
2198                                 usage();
2199                         }
2200                         open_flag = EXT2_FLAG_RW;
2201                         I_flag = 1;
2202                         break;
2203                 case 'z':
2204                         undo_file = optarg;
2205                         break;
2206                 default:
2207                         usage();
2208                 }
2209         if (optind < argc - 1 || optind == argc)
2210                 usage();
2211         if (!open_flag && !l_flag)
2212                 usage();
2213         io_options = strchr(argv[optind], '?');
2214         if (io_options)
2215                 *io_options++ = 0;
2216         device_name = get_devname(NULL, argv[optind], NULL);
2217         if (!device_name) {
2218                 com_err(program_name, 0, _("Unable to resolve '%s'"),
2219                         argv[optind]);
2220                 exit(1);
2221         }
2222 }
2223
2224 #ifdef CONFIG_BUILD_FINDFS
2225 void do_findfs(int argc, char **argv)
2226 {
2227         char    *dev;
2228
2229         if ((argc != 2) ||
2230             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
2231                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
2232                 exit(2);
2233         }
2234         dev = blkid_get_devname(NULL, argv[1], NULL);
2235         if (!dev) {
2236                 com_err("findfs", 0, _("Unable to resolve '%s'"),
2237                         argv[1]);
2238                 exit(1);
2239         }
2240         puts(dev);
2241         exit(0);
2242 }
2243 #endif
2244
2245 static int parse_extended_opts(ext2_filsys fs, const char *opts)
2246 {
2247         struct ext2_super_block *sb = fs->super;
2248         char    *buf, *token, *next, *p, *arg;
2249         int     len, hash_alg;
2250         int     r_usage = 0;
2251         int encoding = 0;
2252         char    *encoding_flags = NULL;
2253
2254         len = strlen(opts);
2255         buf = malloc(len+1);
2256         if (!buf) {
2257                 fprintf(stderr, "%s",
2258                         _("Couldn't allocate memory to parse options!\n"));
2259                 return 1;
2260         }
2261         strcpy(buf, opts);
2262         for (token = buf; token && *token; token = next) {
2263                 p = strchr(token, ',');
2264                 next = 0;
2265                 if (p) {
2266                         *p = 0;
2267                         next = p+1;
2268                 }
2269                 arg = strchr(token, '=');
2270                 if (arg) {
2271                         *arg = 0;
2272                         arg++;
2273                 }
2274                 if (strcmp(token, "clear-mmp") == 0 ||
2275                     strcmp(token, "clear_mmp") == 0) {
2276                         clear_mmp = 1;
2277                 } else if (strcmp(token, "mmp_update_interval") == 0) {
2278                         unsigned long intv;
2279                         if (!arg) {
2280                                 r_usage++;
2281                                 continue;
2282                         }
2283                         intv = strtoul(arg, &p, 0);
2284                         if (*p) {
2285                                 fprintf(stderr,
2286                                         _("Invalid mmp_update_interval: %s\n"),
2287                                         arg);
2288                                 r_usage++;
2289                                 continue;
2290                         }
2291                         if (intv == 0) {
2292                                 intv = EXT4_MMP_UPDATE_INTERVAL;
2293                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
2294                                 fprintf(stderr,
2295                                         _("mmp_update_interval too big: %lu\n"),
2296                                         intv);
2297                                 r_usage++;
2298                                 continue;
2299                         }
2300                         printf(P_("Setting multiple mount protection update "
2301                                   "interval to %lu second\n",
2302                                   "Setting multiple mount protection update "
2303                                   "interval to %lu seconds\n", intv),
2304                                intv);
2305                         sb->s_mmp_update_interval = intv;
2306                         ext2fs_mark_super_dirty(fs);
2307                 } else if (!strcmp(token, "force_fsck")) {
2308                         sb->s_state |= EXT2_ERROR_FS;
2309                         printf(_("Setting filesystem error flag to force fsck.\n"));
2310                         ext2fs_mark_super_dirty(fs);
2311                 } else if (!strcmp(token, "test_fs")) {
2312                         sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
2313                         printf("Setting test filesystem flag\n");
2314                         ext2fs_mark_super_dirty(fs);
2315                 } else if (!strcmp(token, "^test_fs")) {
2316                         sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
2317                         printf("Clearing test filesystem flag\n");
2318                         ext2fs_mark_super_dirty(fs);
2319                 } else if (strcmp(token, "stride") == 0) {
2320                         if (!arg) {
2321                                 r_usage++;
2322                                 continue;
2323                         }
2324                         stride = strtoul(arg, &p, 0);
2325                         if (*p) {
2326                                 fprintf(stderr,
2327                                         _("Invalid RAID stride: %s\n"),
2328                                         arg);
2329                                 r_usage++;
2330                                 continue;
2331                         }
2332                         stride_set = 1;
2333                 } else if (strcmp(token, "stripe-width") == 0 ||
2334                            strcmp(token, "stripe_width") == 0) {
2335                         if (!arg) {
2336                                 r_usage++;
2337                                 continue;
2338                         }
2339                         stripe_width = strtoul(arg, &p, 0);
2340                         if (*p) {
2341                                 fprintf(stderr,
2342                                         _("Invalid RAID stripe-width: %s\n"),
2343                                         arg);
2344                                 r_usage++;
2345                                 continue;
2346                         }
2347                         stripe_width_set = 1;
2348                 } else if (strcmp(token, "hash_alg") == 0 ||
2349                            strcmp(token, "hash-alg") == 0) {
2350                         if (!arg) {
2351                                 r_usage++;
2352                                 continue;
2353                         }
2354                         hash_alg = e2p_string2hash(arg);
2355                         if (hash_alg < 0) {
2356                                 fprintf(stderr,
2357                                         _("Invalid hash algorithm: %s\n"),
2358                                         arg);
2359                                 r_usage++;
2360                                 continue;
2361                         }
2362                         sb->s_def_hash_version = hash_alg;
2363                         printf(_("Setting default hash algorithm "
2364                                  "to %s (%d)\n"),
2365                                arg, hash_alg);
2366                         ext2fs_mark_super_dirty(fs);
2367                 } else if (!strcmp(token, "mount_opts")) {
2368                         if (!arg) {
2369                                 r_usage++;
2370                                 continue;
2371                         }
2372                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
2373                                 fprintf(stderr,
2374                                         "Extended mount options too long\n");
2375                                 continue;
2376                         }
2377                         ext_mount_opts = strdup(arg);
2378                 } else if (!strcmp(token, "encoding")) {
2379                         if (!arg) {
2380                                 r_usage++;
2381                                 continue;
2382                         }
2383                         if (mount_flags & EXT2_MF_MOUNTED) {
2384                                 fputs(_("The casefold feature may only be enabled when "
2385                                         "the filesystem is unmounted.\n"), stderr);
2386                                 r_usage++;
2387                                 continue;
2388                         }
2389                         if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
2390                                 fprintf(stderr, _("Cannot alter existing encoding\n"));
2391                                 r_usage++;
2392                                 continue;
2393                         }
2394                         encoding = e2p_str2encoding(arg);
2395                         if (encoding < 0) {
2396                                 fprintf(stderr, _("Invalid encoding: %s\n"), arg);
2397                                 r_usage++;
2398                                 continue;
2399                         }
2400                         enabling_casefold = 1;
2401                         sb->s_encoding = encoding;
2402                         printf(_("Setting encoding to '%s'\n"), arg);
2403                         sb->s_encoding_flags =
2404                                 e2p_get_encoding_flags(sb->s_encoding);
2405                 } else if (!strcmp(token, "encoding_flags")) {
2406                         if (!arg) {
2407                                 r_usage++;
2408                                 continue;
2409                         }
2410                         encoding_flags = arg;
2411                 } else if (!strcmp(token, "orphan_file_size")) {
2412                         if (!arg) {
2413                                 r_usage++;
2414                                 continue;
2415                         }
2416                         orphan_file_blocks = parse_num_blocks2(arg,
2417                                                  fs->super->s_log_block_size);
2418
2419                         if (orphan_file_blocks < 1) {
2420                                 fprintf(stderr,
2421                                         _("Invalid size of orphan file %s\n"),
2422                                         arg);
2423                                 r_usage++;
2424                                 continue;
2425                         }
2426                 } else
2427                         r_usage++;
2428         }
2429
2430         if (encoding > 0 && !r_usage) {
2431                 sb->s_encoding_flags =
2432                         e2p_get_encoding_flags(sb->s_encoding);
2433
2434                 if (encoding_flags &&
2435                     e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
2436                                            &sb->s_encoding_flags)) {
2437                         fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
2438                                         encoding_flags);
2439                         r_usage++;
2440                 } else if (encoding_flags)
2441                         printf(_("Setting encoding_flags to '%s'\n"),
2442                                  encoding_flags);
2443                 ext2fs_set_feature_casefold(sb);
2444                 ext2fs_mark_super_dirty(fs);
2445         } else if (encoding_flags && !r_usage) {
2446                 fprintf(stderr, _("error: An encoding must be explicitly "
2447                                   "specified when passing encoding-flags\n"));
2448                 r_usage++;
2449         }
2450         if (r_usage) {
2451                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
2452                         "Extended options are separated by commas, "
2453                         "and may take an argument which\n"
2454                         "\tis set off by an equals ('=') sign.\n\n"
2455                         "Valid extended options are:\n"
2456                         "\tclear_mmp\n"
2457                         "\thash_alg=<hash algorithm>\n"
2458                         "\tmount_opts=<extended default mount options>\n"
2459                         "\tmmp_update_interval=<mmp update interval in seconds>\n"
2460                         "\tstride=<RAID per-disk chunk size in blocks>\n"
2461                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
2462                         "\tforce_fsck\n"
2463                         "\ttest_fs\n"
2464                         "\t^test_fs\n"
2465                         "\tencoding=<encoding>\n"
2466                         "\tencoding_flags=<flags>\n"));
2467                 free(buf);
2468                 return 1;
2469         }
2470         free(buf);
2471
2472         return 0;
2473 }
2474
2475 /*
2476  * Fill in the block bitmap bmap with the information regarding the
2477  * blocks to be moved
2478  */
2479 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
2480                             ext2fs_block_bitmap bmap)
2481 {
2482         dgrp_t i;
2483         int retval;
2484         ext2_badblocks_list bb_list = 0;
2485         blk64_t j, needed_blocks = 0;
2486         blk64_t start_blk, end_blk;
2487
2488         retval = ext2fs_read_bb_inode(fs, &bb_list);
2489         if (retval)
2490                 return retval;
2491
2492         for (i = 0; i < fs->group_desc_count; i++) {
2493                 start_blk = ext2fs_inode_table_loc(fs, i) +
2494                                         fs->inode_blocks_per_group;
2495
2496                 end_blk = ext2fs_inode_table_loc(fs, i) +
2497                                         new_ino_blks_per_grp;
2498
2499                 for (j = start_blk; j < end_blk; j++) {
2500                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
2501                                 /*
2502                                  * IF the block is a bad block we fail
2503                                  */
2504                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
2505                                         ext2fs_badblocks_list_free(bb_list);
2506                                         return ENOSPC;
2507                                 }
2508
2509                                 ext2fs_mark_block_bitmap2(bmap, j);
2510                         } else {
2511                                 /*
2512                                  * We are going to use this block for
2513                                  * inode table. So mark them used.
2514                                  */
2515                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
2516                         }
2517                 }
2518                 needed_blocks += end_blk - start_blk;
2519         }
2520
2521         ext2fs_badblocks_list_free(bb_list);
2522         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
2523                 return ENOSPC;
2524
2525         return 0;
2526 }
2527
2528 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
2529 {
2530         dgrp_t group;
2531         group = ext2fs_group_of_blk2(fs, blk);
2532         if (ext2fs_block_bitmap_loc(fs, group) == blk)
2533                 return 1;
2534         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
2535                 return 1;
2536         return 0;
2537 }
2538
2539 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
2540 {
2541         blk64_t start_blk, end_blk;
2542         start_blk = fs->super->s_first_data_block +
2543                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
2544         /*
2545          * We cannot get new block beyond end_blk for for the last block group
2546          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
2547          */
2548         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
2549         if (blk >= start_blk && blk <= end_blk)
2550                 return 1;
2551         return 0;
2552 }
2553
2554 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2555 {
2556
2557         char *buf;
2558         dgrp_t group = 0;
2559         errcode_t retval;
2560         int meta_data = 0;
2561         blk64_t blk, new_blk, goal;
2562         struct blk_move *bmv;
2563
2564         retval = ext2fs_get_mem(fs->blocksize, &buf);
2565         if (retval)
2566                 return retval;
2567
2568         for (new_blk = blk = fs->super->s_first_data_block;
2569              blk < ext2fs_blocks_count(fs->super); blk++) {
2570                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2571                         continue;
2572
2573                 if (ext2fs_is_meta_block(fs, blk)) {
2574                         /*
2575                          * If the block is mapping a fs meta data block
2576                          * like group desc/block bitmap/inode bitmap. We
2577                          * should find a block in the same group and fix
2578                          * the respective fs metadata pointers. Otherwise
2579                          * fail
2580                          */
2581                         group = ext2fs_group_of_blk2(fs, blk);
2582                         goal = ext2fs_group_first_block2(fs, group);
2583                         meta_data = 1;
2584
2585                 } else {
2586                         goal = new_blk;
2587                 }
2588                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2589                 if (retval)
2590                         goto err_out;
2591
2592                 /* new fs meta data block should be in the same group */
2593                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2594                         retval = ENOSPC;
2595                         goto err_out;
2596                 }
2597
2598                 /* Mark this block as allocated */
2599                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2600
2601                 /* Add it to block move list */
2602                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2603                 if (retval)
2604                         goto err_out;
2605
2606                 bmv->old_loc = blk;
2607                 bmv->new_loc = new_blk;
2608
2609                 list_add(&(bmv->list), &blk_move_list);
2610
2611                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2612                 if (retval)
2613                         goto err_out;
2614
2615                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2616                 if (retval)
2617                         goto err_out;
2618         }
2619
2620 err_out:
2621         ext2fs_free_mem(&buf);
2622         return retval;
2623 }
2624
2625 static blk64_t translate_block(blk64_t blk)
2626 {
2627         struct list_head *entry;
2628         struct blk_move *bmv;
2629
2630         list_for_each(entry, &blk_move_list) {
2631                 bmv = list_entry(entry, struct blk_move, list);
2632                 if (bmv->old_loc == blk)
2633                         return bmv->new_loc;
2634         }
2635
2636         return 0;
2637 }
2638
2639 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2640                          blk64_t *block_nr,
2641                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2642                          blk64_t ref_block EXT2FS_ATTR((unused)),
2643                          int ref_offset EXT2FS_ATTR((unused)),
2644                          void *priv_data)
2645 {
2646         int ret = 0;
2647         blk64_t new_blk;
2648         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2649
2650         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2651                 return 0;
2652         new_blk = translate_block(*block_nr);
2653         if (new_blk) {
2654                 *block_nr = new_blk;
2655                 /*
2656                  * This will force the ext2fs_write_inode in the iterator
2657                  */
2658                 ret |= BLOCK_CHANGED;
2659         }
2660
2661         return ret;
2662 }
2663
2664 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2665 {
2666         errcode_t retval = 0;
2667         ext2_ino_t ino;
2668         blk64_t blk;
2669         char *block_buf = 0;
2670         struct ext2_inode inode;
2671         ext2_inode_scan scan = NULL;
2672
2673         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2674         if (retval)
2675                 return retval;
2676
2677         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2678         if (retval)
2679                 goto err_out;
2680
2681         while (1) {
2682                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2683                 if (retval)
2684                         goto err_out;
2685
2686                 if (!ino)
2687                         break;
2688
2689                 if (inode.i_links_count == 0)
2690                         continue; /* inode not in use */
2691
2692                 /* FIXME!!
2693                  * If we end up modifying the journal inode
2694                  * the sb->s_jnl_blocks will differ. But a
2695                  * subsequent e2fsck fixes that.
2696                  * Do we need to fix this ??
2697                  */
2698
2699                 if (ext2fs_file_acl_block(fs, &inode) &&
2700                     ext2fs_test_block_bitmap2(bmap,
2701                                         ext2fs_file_acl_block(fs, &inode))) {
2702                         blk = translate_block(ext2fs_file_acl_block(fs,
2703                                                                     &inode));
2704                         if (!blk)
2705                                 continue;
2706
2707                         ext2fs_file_acl_block_set(fs, &inode, blk);
2708
2709                         /*
2710                          * Write the inode to disk so that inode table
2711                          * resizing can work
2712                          */
2713                         retval = ext2fs_write_inode(fs, ino, &inode);
2714                         if (retval)
2715                                 goto err_out;
2716                 }
2717
2718                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2719                         continue;
2720
2721                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2722                                                process_block, bmap);
2723                 if (retval)
2724                         goto err_out;
2725
2726         }
2727
2728 err_out:
2729         ext2fs_free_mem(&block_buf);
2730         ext2fs_close_inode_scan(scan);
2731
2732         return retval;
2733 }
2734
2735 /*
2736  * We need to scan for inode and block bitmaps that may need to be
2737  * moved.  This can take place if the filesystem was formatted for
2738  * RAID arrays using the mke2fs's extended option "stride".
2739  */
2740 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2741 {
2742         dgrp_t i;
2743         blk64_t blk, new_blk;
2744
2745         for (i = 0; i < fs->group_desc_count; i++) {
2746                 blk = ext2fs_block_bitmap_loc(fs, i);
2747                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2748                         new_blk = translate_block(blk);
2749                         if (!new_blk)
2750                                 continue;
2751                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2752                 }
2753
2754                 blk = ext2fs_inode_bitmap_loc(fs, i);
2755                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2756                         new_blk = translate_block(blk);
2757                         if (!new_blk)
2758                                 continue;
2759                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2760                 }
2761         }
2762         return 0;
2763 }
2764
2765 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2766 {
2767         dgrp_t i;
2768         blk64_t blk;
2769         errcode_t retval;
2770         int new_ino_blks_per_grp;
2771         unsigned int j;
2772         char *old_itable = NULL, *new_itable = NULL;
2773         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2774         unsigned long old_ino_size;
2775         int old_itable_size, new_itable_size;
2776
2777         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2778         old_ino_size = EXT2_INODE_SIZE(fs->super);
2779
2780         new_ino_blks_per_grp = ext2fs_div_ceil(
2781                                         EXT2_INODES_PER_GROUP(fs->super) *
2782                                         new_ino_size,
2783                                         fs->blocksize);
2784
2785         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2786
2787         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2788         if (retval)
2789                 return retval;
2790
2791         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2792         if (retval)
2793                 goto err_out;
2794
2795         tmp_old_itable = old_itable;
2796         tmp_new_itable = new_itable;
2797
2798         for (i = 0; i < fs->group_desc_count; i++) {
2799                 blk = ext2fs_inode_table_loc(fs, i);
2800                 retval = io_channel_read_blk64(fs->io, blk,
2801                                 fs->inode_blocks_per_group, old_itable);
2802                 if (retval)
2803                         goto err_out;
2804
2805                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2806                         memcpy(new_itable, old_itable, old_ino_size);
2807
2808                         memset(new_itable+old_ino_size, 0,
2809                                         new_ino_size - old_ino_size);
2810
2811                         new_itable += new_ino_size;
2812                         old_itable += old_ino_size;
2813                 }
2814
2815                 /* reset the pointer */
2816                 old_itable = tmp_old_itable;
2817                 new_itable = tmp_new_itable;
2818
2819                 retval = io_channel_write_blk64(fs->io, blk,
2820                                         new_ino_blks_per_grp, new_itable);
2821                 if (retval)
2822                         goto err_out;
2823         }
2824
2825         /* Update the meta data */
2826         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2827         ext2fs_free_inode_cache(fs->icache);
2828         fs->icache = 0;
2829         fs->super->s_inode_size = new_ino_size;
2830
2831 err_out:
2832         if (old_itable)
2833                 ext2fs_free_mem(&old_itable);
2834
2835         if (new_itable)
2836                 ext2fs_free_mem(&new_itable);
2837
2838         return retval;
2839 }
2840
2841
2842 #define list_for_each_safe(pos, pnext, head) \
2843         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2844              pos = pnext, pnext = pos->next)
2845
2846 static void free_blk_move_list(void)
2847 {
2848         struct list_head *entry, *tmp;
2849         struct blk_move *bmv;
2850
2851         list_for_each_safe(entry, tmp, &blk_move_list) {
2852                 bmv = list_entry(entry, struct blk_move, list);
2853                 list_del(entry);
2854                 ext2fs_free_mem(&bmv);
2855         }
2856         return;
2857 }
2858
2859 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2860 {
2861         errcode_t retval;
2862         int new_ino_blks_per_grp;
2863         ext2fs_block_bitmap bmap;
2864
2865         retval = ext2fs_read_inode_bitmap(fs);
2866         if (retval) {
2867                 fputs(_("Failed to read inode bitmap\n"), stderr);
2868                 return retval;
2869         }
2870         retval = ext2fs_read_block_bitmap(fs);
2871         if (retval) {
2872                 fputs(_("Failed to read block bitmap\n"), stderr);
2873                 return retval;
2874         }
2875         INIT_LIST_HEAD(&blk_move_list);
2876
2877
2878         new_ino_blks_per_grp = ext2fs_div_ceil(
2879                                         EXT2_INODES_PER_GROUP(fs->super)*
2880                                         new_size,
2881                                         fs->blocksize);
2882
2883         /* We may change the file system.
2884          * Mark the file system as invalid so that
2885          * the user is prompted to run fsck.
2886          */
2887         fs->super->s_state &= ~EXT2_VALID_FS;
2888
2889         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2890                                                 &bmap);
2891         if (retval) {
2892                 fputs(_("Failed to allocate block bitmap when "
2893                                 "increasing inode size\n"), stderr);
2894                 return retval;
2895         }
2896         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2897         if (retval) {
2898                 fputs(_("Not enough space to increase inode size \n"), stderr);
2899                 goto err_out;
2900         }
2901         retval = move_block(fs, bmap);
2902         if (retval) {
2903                 fputs(_("Failed to relocate blocks during inode resize \n"),
2904                       stderr);
2905                 goto err_out;
2906         }
2907         retval = inode_scan_and_fix(fs, bmap);
2908         if (retval)
2909                 goto err_out_undo;
2910
2911         retval = group_desc_scan_and_fix(fs, bmap);
2912         if (retval)
2913                 goto err_out_undo;
2914
2915         retval = expand_inode_table(fs, new_size);
2916         if (retval)
2917                 goto err_out_undo;
2918
2919         ext2fs_calculate_summary_stats(fs, 1 /* super only */);
2920
2921         fs->super->s_state |= EXT2_VALID_FS;
2922         /* mark super block and block bitmap as dirty */
2923         ext2fs_mark_super_dirty(fs);
2924         ext2fs_mark_bb_dirty(fs);
2925
2926 err_out:
2927         free_blk_move_list();
2928         ext2fs_free_block_bitmap(bmap);
2929
2930         return retval;
2931
2932 err_out_undo:
2933         free_blk_move_list();
2934         ext2fs_free_block_bitmap(bmap);
2935         fputs(_("Error in resizing the inode size.\n"
2936                         "Run e2undo to undo the "
2937                         "file system changes. \n"), stderr);
2938
2939         return retval;
2940 }
2941
2942 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2943 {
2944         errcode_t retval = 0;
2945         const char *tdb_dir;
2946         char *tdb_file = NULL;
2947         char *dev_name, *tmp_name;
2948
2949         /* (re)open a specific undo file */
2950         if (undo_file && undo_file[0] != 0) {
2951                 retval = set_undo_io_backing_manager(*io_ptr);
2952                 if (retval)
2953                         goto err;
2954                 *io_ptr = undo_io_manager;
2955                 retval = set_undo_io_backup_file(undo_file);
2956                 if (retval)
2957                         goto err;
2958                 printf(_("Overwriting existing filesystem; this can be undone "
2959                          "using the command:\n"
2960                          "    e2undo %s %s\n\n"),
2961                          undo_file, name);
2962                 return retval;
2963         }
2964
2965         /*
2966          * Configuration via a conf file would be
2967          * nice
2968          */
2969         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2970         if (!tdb_dir)
2971                 tdb_dir = "/var/lib/e2fsprogs";
2972
2973         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2974             access(tdb_dir, W_OK))
2975                 return 0;
2976
2977         tmp_name = strdup(name);
2978         if (!tmp_name)
2979                 goto errout;
2980         dev_name = basename(tmp_name);
2981         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2982         if (!tdb_file) {
2983                 free(tmp_name);
2984                 goto errout;
2985         }
2986         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2987         free(tmp_name);
2988
2989         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2990                 retval = errno;
2991                 com_err(program_name, retval,
2992                         _("while trying to delete %s"), tdb_file);
2993                 goto errout;
2994         }
2995
2996         retval = set_undo_io_backing_manager(*io_ptr);
2997         if (retval)
2998                 goto errout;
2999         *io_ptr = undo_io_manager;
3000         retval = set_undo_io_backup_file(tdb_file);
3001         if (retval)
3002                 goto errout;
3003         printf(_("Overwriting existing filesystem; this can be undone "
3004                  "using the command:\n"
3005                  "    e2undo %s %s\n\n"),
3006                  tdb_file, name);
3007
3008         free(tdb_file);
3009         return 0;
3010 errout:
3011         free(tdb_file);
3012 err:
3013         com_err("tune2fs", retval, "while trying to setup undo file\n");
3014         return retval;
3015 }
3016
3017 static int
3018 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
3019 {
3020         int retval, nr_users, start;
3021         journal_superblock_t *jsb;
3022         ext2_filsys jfs;
3023         __u8 *j_uuid;
3024         char *journal_path;
3025         char uuid[UUID_STR_SIZE];
3026         char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3027
3028         if (!ext2fs_has_feature_journal(sb) || uuid_is_null(sb->s_journal_uuid))
3029                 return 0;
3030
3031         uuid_unparse(sb->s_journal_uuid, uuid);
3032         journal_path = blkid_get_devname(NULL, "UUID", uuid);
3033         if (!journal_path)
3034                 return 0;
3035
3036         retval = ext2fs_open2(journal_path, io_options,
3037                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
3038                               0, 0, unix_io_manager, &jfs);
3039         if (retval) {
3040                 com_err(program_name, retval,
3041                         _("while trying to open %s"),
3042                         journal_path);
3043                 return retval;
3044         }
3045
3046         retval = get_journal_sb(jfs, buf);
3047         if (retval != 0) {
3048                 if (retval == EXT2_ET_UNSUPP_FEATURE)
3049                         fprintf(stderr, _("%s is not a journal device.\n"),
3050                                 journal_path);
3051                 return retval;
3052         }
3053
3054         jsb = (journal_superblock_t *) buf;
3055         /* Find the filesystem UUID */
3056         nr_users = ntohl(jsb->s_nr_users);
3057         if (nr_users > JBD2_USERS_MAX) {
3058                 fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
3059                                  "is too high (%d).\n"), nr_users);
3060                 return EXT2_ET_CORRUPT_JOURNAL_SB;
3061         }
3062
3063         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
3064         if (j_uuid == NULL) {
3065                 fputs(_("Filesystem's UUID not found on journal device.\n"),
3066                       stderr);
3067                 return EXT2_ET_LOAD_EXT_JOURNAL;
3068         }
3069
3070         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
3071
3072         start = ext2fs_journal_sb_start(jfs->blocksize);
3073         /* Write back the journal superblock */
3074         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
3075         if (retval != 0) {
3076                 com_err(program_name, retval,
3077                         "while writing journal superblock.");
3078                 return retval;
3079         }
3080
3081         ext2fs_close(jfs);
3082
3083         return 0;
3084 }
3085
3086 /*
3087  * Use FS_IOC_SETFSLABEL or FS_IOC_GETFSLABEL to set/get file system label
3088  * Return:      0 on success
3089  *              1 on error
3090  *              -1 when the old method should be used
3091  */
3092 static int handle_fslabel(int setlabel)
3093 {
3094 #ifdef __linux__
3095         errcode_t ret;
3096         int mnt_flags, fd;
3097         char label[FSLABEL_MAX];
3098         int maxlen = FSLABEL_MAX - 1;
3099         char mntpt[PATH_MAX + 1];
3100
3101         ret = ext2fs_check_mount_point(device_name, &mnt_flags,
3102                                           mntpt, sizeof(mntpt));
3103         if (ret)
3104                 return -1;
3105
3106         if (!(mnt_flags & EXT2_MF_MOUNTED) ||
3107             (setlabel && (mnt_flags & EXT2_MF_READONLY)))
3108                 return -1;
3109
3110         if (!mntpt[0])
3111                 return -1;
3112
3113         fd = open(mntpt, O_RDONLY);
3114         if (fd < 0)
3115                 return -1;
3116
3117         /* Get fs label */
3118         if (!setlabel) {
3119                 if (ioctl(fd, FS_IOC_GETFSLABEL, &label)) {
3120                         close(fd);
3121                         if (errno == ENOTTY)
3122                                 return -1;
3123                         com_err(mntpt, errno, _("while trying to get fs label"));
3124                         return 1;
3125                 }
3126                 close(fd);
3127                 printf("%.*s\n", EXT2_LEN_STR(label));
3128                 return 0;
3129         }
3130
3131         /* If it's extN file system, truncate the label to appropriate size */
3132         if (mnt_flags & EXT2_MF_EXTFS)
3133                 maxlen = EXT2_LABEL_LEN;
3134         if (strlen(new_label) > maxlen) {
3135                 fputs(_("Warning: label too long, truncating.\n"),
3136                       stderr);
3137                 new_label[maxlen] = '\0';
3138         }
3139
3140         /* Set fs label */
3141         if (ioctl(fd, FS_IOC_SETFSLABEL, new_label)) {
3142                 close(fd);
3143                 if (errno == ENOTTY)
3144                         return -1;
3145                 com_err(mntpt, errno, _("while trying to set fs label"));
3146                 return 1;
3147         }
3148         close(fd);
3149         return 0;
3150 #else
3151         return -1;
3152 #endif
3153 }
3154
3155 #ifndef BUILD_AS_LIB
3156 int main(int argc, char **argv)
3157 #else
3158 int tune2fs_main(int argc, char **argv)
3159 #endif  /* BUILD_AS_LIB */
3160 {
3161         errcode_t retval;
3162         ext2_filsys fs;
3163         struct ext2_super_block *sb;
3164         io_manager io_ptr, io_ptr_orig = NULL;
3165         int rc = 0;
3166         char default_undo_file[1] = { 0 };
3167         char mntpt[PATH_MAX + 1] = { 0 };
3168         int fd = -1;
3169         struct fsuuid *fsuuid = NULL;
3170
3171 #ifdef ENABLE_NLS
3172         setlocale(LC_MESSAGES, "");
3173         setlocale(LC_CTYPE, "");
3174         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
3175         textdomain(NLS_CAT_NAME);
3176         set_com_err_gettext(gettext);
3177 #endif
3178         if (argc && *argv)
3179                 program_name = *argv;
3180         else
3181                 usage();
3182         add_error_table(&et_ext2_error_table);
3183
3184 #ifdef CONFIG_BUILD_FINDFS
3185         if (strcmp(get_progname(argv[0]), "findfs") == 0)
3186                 do_findfs(argc, argv);
3187 #endif
3188         if (strcmp(get_progname(argv[0]), "e2label") == 0)
3189                 parse_e2label_options(argc, argv);
3190         else
3191                 parse_tune2fs_options(argc, argv);
3192
3193 #ifdef CONFIG_TESTIO_DEBUG
3194         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
3195                 io_ptr = test_io_manager;
3196                 test_io_backing_manager = unix_io_manager;
3197         } else
3198 #endif
3199                 io_ptr = unix_io_manager;
3200
3201         /*
3202          * Try the get/set fs label using ioctls before we even attempt
3203          * to open the file system.
3204          */
3205         if (L_flag || print_label) {
3206                 rc = handle_fslabel(L_flag);
3207                 if (rc != -1) {
3208 #ifndef BUILD_AS_LIB
3209                         exit(rc);
3210 #endif
3211                         return rc;
3212                 }
3213                 rc = 0;
3214         }
3215
3216 retry_open:
3217         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
3218                 open_flag |= EXT2_FLAG_SKIP_MMP;
3219
3220         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
3221                 EXT2_FLAG_JOURNAL_DEV_OK;
3222
3223         /* keep the filesystem struct around to dump MMP data */
3224         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
3225
3226         retval = ext2fs_open2(device_name, io_options, open_flag,
3227                               0, 0, io_ptr, &fs);
3228         if (retval) {
3229                 com_err(program_name, retval,
3230                         _("while trying to open %s"),
3231                         device_name);
3232                 if (retval == EXT2_ET_MMP_FSCK_ON ||
3233                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
3234                         dump_mmp_msg(fs->mmp_buf,
3235                                      _("If you are sure the filesystem "
3236                                        "is not in use on any node, run:\n"
3237                                        "'tune2fs -f -E clear_mmp {device}'\n"));
3238                 else if (retval == EXT2_ET_MMP_FAILED)
3239                         dump_mmp_msg(fs->mmp_buf, NULL);
3240                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
3241                         fprintf(stderr,
3242                                 _("MMP block magic is bad. Try to fix it by "
3243                                   "running:\n'e2fsck -f %s'\n"), device_name);
3244                 else if (retval == EXT2_ET_BAD_MAGIC)
3245                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
3246                 else if (retval != EXT2_ET_MMP_FAILED)
3247                         fprintf(stderr, "%s",
3248                              _("Couldn't find valid filesystem superblock.\n"));
3249
3250                 ext2fs_free(fs);
3251                 exit(1);
3252         }
3253         if (ext2fs_has_feature_journal_dev(fs->super)) {
3254                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
3255                 ext2fs_free(fs);
3256                 exit(1);
3257         }
3258         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
3259
3260         if (I_flag) {
3261                 /*
3262                  * Check the inode size is right so we can issue an
3263                  * error message and bail before setting up the tdb
3264                  * file.
3265                  */
3266                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
3267                         fprintf(stderr, _("The inode size is already %lu\n"),
3268                                 new_inode_size);
3269                         rc = 1;
3270                         goto closefs;
3271                 }
3272                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
3273                         fprintf(stderr, "%s",
3274                                 _("Shrinking inode size is not supported\n"));
3275                         rc = 1;
3276                         goto closefs;
3277                 }
3278                 if (new_inode_size > fs->blocksize) {
3279                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
3280                                 new_inode_size, fs->blocksize);
3281                         rc = 1;
3282                         goto closefs;
3283                 }
3284                 rc = check_fsck_needed(fs,
3285                         _("Resizing inodes could take some time."));
3286                 if (rc)
3287                         goto closefs;
3288                 /*
3289                  * If inode resize is requested use the
3290                  * Undo I/O manager
3291                  */
3292                 undo_file = default_undo_file;
3293         }
3294
3295         /* Set up an undo file */
3296         if (undo_file && io_ptr_orig == NULL) {
3297                 io_ptr_orig = io_ptr;
3298                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
3299                 if (retval) {
3300                         rc = 1;
3301                         goto closefs;
3302                 }
3303                 if (io_ptr != io_ptr_orig) {
3304                         ext2fs_close_free(&fs);
3305                         goto retry_open;
3306                 }
3307         }
3308
3309         sb = fs->super;
3310         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3311
3312         if (print_label) {
3313                 /* For e2label emulation */
3314                 printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
3315                 remove_error_table(&et_ext2_error_table);
3316                 goto closefs;
3317         }
3318
3319         retval = ext2fs_check_mount_point(device_name, &mount_flags,
3320                                         mntpt, sizeof(mntpt));
3321         if (retval) {
3322                 com_err("ext2fs_check_mount_point", retval,
3323                         _("while determining whether %s is mounted."),
3324                         device_name);
3325                 rc = 1;
3326                 goto closefs;
3327         }
3328
3329 #ifdef NO_RECOVERY
3330         /* Warn if file system needs recovery and it is opened for writing. */
3331         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
3332             (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
3333             (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
3334                 fprintf(stderr,
3335 _("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
3336   "\te2fsck -E journal_only %s\n\n"
3337   "then rerun this command.  Otherwise, any changes made may be overwritten\n"
3338   "by journal recovery.\n"), device_name);
3339         }
3340 #else
3341         /* Recover the journal if possible. */
3342         if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
3343             ext2fs_has_feature_journal_needs_recovery(fs->super)) {
3344                 printf(_("Recovering journal.\n"));
3345                 retval = ext2fs_run_ext3_journal(&fs);
3346                 if (retval) {
3347                         com_err("tune2fs", retval,
3348                                 "while recovering journal.\n");
3349                         printf(_("Please run e2fsck -fy %s.\n"), device_name);
3350                         if (!fs)
3351                                 exit(1);
3352                         rc = 1;
3353                         goto closefs;
3354                 }
3355                 sb = fs->super;
3356         }
3357 #endif
3358
3359         /* Normally we only need to write out the superblock */
3360         fs->flags |= EXT2_FLAG_SUPER_ONLY;
3361
3362         if (c_flag) {
3363                 if (max_mount_count == 65536)
3364                         max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
3365                                 (random() % EXT2_DFL_MAX_MNT_COUNT);
3366                 sb->s_max_mnt_count = max_mount_count;
3367                 ext2fs_mark_super_dirty(fs);
3368                 printf(_("Setting maximal mount count to %d\n"),
3369                        max_mount_count);
3370         }
3371         if (C_flag) {
3372                 sb->s_mnt_count = mount_count;
3373                 ext2fs_mark_super_dirty(fs);
3374                 printf(_("Setting current mount count to %d\n"), mount_count);
3375         }
3376         if (e_flag) {
3377                 sb->s_errors = errors;
3378                 ext2fs_mark_super_dirty(fs);
3379                 printf(_("Setting error behavior to %d\n"), errors);
3380         }
3381         if (g_flag) {
3382                 sb->s_def_resgid = resgid;
3383                 ext2fs_mark_super_dirty(fs);
3384                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
3385         }
3386         if (i_flag) {
3387                 if ((unsigned long long)interval >= (1ULL << 32)) {
3388                         com_err(program_name, 0,
3389                                 _("interval between checks is too big (%lu)"),
3390                                 interval);
3391                         rc = 1;
3392                         goto closefs;
3393                 }
3394                 sb->s_checkinterval = interval;
3395                 ext2fs_mark_super_dirty(fs);
3396                 printf(_("Setting interval between checks to %lu seconds\n"),
3397                        interval);
3398         }
3399         if (m_flag) {
3400                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
3401                                           ext2fs_blocks_count(sb) / 100.0);
3402                 ext2fs_mark_super_dirty(fs);
3403                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
3404                         reserved_ratio,
3405                         (unsigned long long) ext2fs_r_blocks_count(sb));
3406         }
3407         if (r_flag) {
3408                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
3409                         com_err(program_name, 0,
3410                                 _("reserved blocks count is too big (%llu)"),
3411                                 (unsigned long long) reserved_blocks);
3412                         rc = 1;
3413                         goto closefs;
3414                 }
3415                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
3416                 ext2fs_mark_super_dirty(fs);
3417                 printf(_("Setting reserved blocks count to %llu\n"),
3418                        (unsigned long long) reserved_blocks);
3419         }
3420         if (s_flag == 1) {
3421                 if (ext2fs_has_feature_sparse_super(sb)) {
3422                         fputs(_("\nThe filesystem already has sparse "
3423                                 "superblocks.\n"), stderr);
3424                 } else if (ext2fs_has_feature_meta_bg(sb)) {
3425                         fputs(_("\nSetting the sparse superblock flag not "
3426                                 "supported\nfor filesystems with "
3427                                 "the meta_bg feature enabled.\n"),
3428                                 stderr);
3429                         rc = 1;
3430                         goto closefs;
3431                 } else {
3432                         ext2fs_set_feature_sparse_super(sb);
3433                         sb->s_state &= ~EXT2_VALID_FS;
3434                         ext2fs_mark_super_dirty(fs);
3435                         printf(_("\nSparse superblock flag set.  %s"),
3436                                _(please_fsck));
3437                 }
3438         }
3439         if (s_flag == 0) {
3440                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
3441                       stderr);
3442                 rc = 1;
3443                 goto closefs;
3444         }
3445         if (T_flag) {
3446                 sb->s_lastcheck = last_check_time;
3447                 ext2fs_mark_super_dirty(fs);
3448                 printf(_("Setting time filesystem last checked to %s\n"),
3449                        ctime(&last_check_time));
3450         }
3451         if (u_flag) {
3452                 sb->s_def_resuid = resuid;
3453                 ext2fs_mark_super_dirty(fs);
3454                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
3455         }
3456         if (L_flag) {
3457                 if (strlen(new_label) > sizeof(sb->s_volume_name))
3458                         fputs(_("Warning: label too long, truncating.\n"),
3459                               stderr);
3460                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
3461                 strncpy((char *)sb->s_volume_name, new_label,
3462                         sizeof(sb->s_volume_name));
3463                 ext2fs_mark_super_dirty(fs);
3464         }
3465         if (M_flag) {
3466                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
3467                 strncpy((char *)sb->s_last_mounted, new_last_mounted,
3468                         sizeof(sb->s_last_mounted));
3469                 ext2fs_mark_super_dirty(fs);
3470         }
3471         if (mntopts_cmd) {
3472                 rc = update_mntopts(fs, mntopts_cmd);
3473                 if (rc)
3474                         goto closefs;
3475         }
3476         if (features_cmd) {
3477                 rc = update_feature_set(fs, features_cmd);
3478                 if (rc)
3479                         goto closefs;
3480         }
3481         if (extended_cmd) {
3482                 rc = parse_extended_opts(fs, extended_cmd);
3483                 if (rc)
3484                         goto closefs;
3485                 if (clear_mmp && !f_flag) {
3486                         fputs(_("Error in using clear_mmp. "
3487                                 "It must be used with -f\n"),
3488                               stderr);
3489                         rc = 1;
3490                         goto closefs;
3491                 }
3492         }
3493         if (clear_mmp) {
3494                 rc = ext2fs_mmp_clear(fs);
3495                 goto closefs;
3496         }
3497         if (journal_size || journal_device) {
3498                 rc = add_journal(fs);
3499                 if (rc)
3500                         goto closefs;
3501         }
3502         if (orphan_file_blocks) {
3503                 errcode_t err;
3504
3505                 err = ext2fs_read_bitmaps(fs);
3506                 if (err) {
3507                         com_err(program_name, err, "%s",
3508                                 _("while loading bitmaps"));
3509                         rc = 1;
3510                         goto closefs;
3511                 }
3512                 err = ext2fs_create_orphan_file(fs, orphan_file_blocks);
3513                 if (err) {
3514                         com_err(program_name, err, "%s",
3515                                 _("while creating orphan file"));
3516                         rc = 1;
3517                         goto closefs;
3518                 }
3519         }
3520
3521         if (Q_flag) {
3522                 if (mount_flags & EXT2_MF_MOUNTED) {
3523                         fputs(_("The quota feature may only be changed when "
3524                                 "the filesystem is unmounted.\n"), stderr);
3525                         rc = 1;
3526                         goto closefs;
3527                 }
3528                 rc = handle_quota_options(fs);
3529                 if (rc)
3530                         goto closefs;
3531         }
3532
3533         if (U_flag) {
3534                 int set_csum = 0;
3535                 dgrp_t i;
3536                 char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
3537                 __u8 old_uuid[UUID_SIZE];
3538                 uuid_t new_uuid;
3539                 errcode_t ret = -1;
3540
3541                 if (ext2fs_has_feature_stable_inodes(fs->super)) {
3542                         fputs(_("Cannot change the UUID of this filesystem "
3543                                 "because it has the stable_inodes feature "
3544                                 "flag.\n"), stderr);
3545                         exit(1);
3546                 }
3547
3548                 if (!ext2fs_has_feature_csum_seed(fs->super) &&
3549                     (ext2fs_has_feature_metadata_csum(fs->super) ||
3550                      ext2fs_has_feature_ea_inode(fs->super))) {
3551                         rc = check_fsck_needed(fs,
3552                                 _("Setting the UUID on this "
3553                                   "filesystem could take some time."));
3554                         if (rc)
3555                                 goto closefs;
3556                         rewrite_checksums = REWRITE_ALL;
3557                 }
3558
3559                 if (ext2fs_has_group_desc_csum(fs)) {
3560                         /*
3561                          * Changing the UUID on a metadata_csum FS requires
3562                          * rewriting all metadata, which can race with a
3563                          * mounted fs.  Don't allow that unless we're saving
3564                          * the checksum seed.
3565                          */
3566                         if ((mount_flags & EXT2_MF_MOUNTED) &&
3567                             !ext2fs_has_feature_csum_seed(fs->super) &&
3568                             ext2fs_has_feature_metadata_csum(fs->super)) {
3569                                 fputs(_("The UUID may only be "
3570                                         "changed when the filesystem is "
3571                                         "unmounted.\n"), stderr);
3572                                 fputs(_("If you only use kernels newer than "
3573                                         "v4.4, run 'tune2fs -O "
3574                                         "metadata_csum_seed' and re-run this "
3575                                         "command.\n"), stderr);
3576                                 try_confirm_csum_seed_support();
3577                                 rc = 1;
3578                                 goto closefs;
3579                         }
3580
3581                         /*
3582                          * Determine if the block group checksums are
3583                          * correct so we know whether or not to set
3584                          * them later on.
3585                          */
3586                         for (i = 0; i < fs->group_desc_count; i++)
3587                                 if (!ext2fs_group_desc_csum_verify(fs, i))
3588                                         break;
3589                         if (i >= fs->group_desc_count)
3590                                 set_csum = 1;
3591                 }
3592
3593 #ifdef __linux__
3594                 if ((mount_flags & EXT2_MF_MOUNTED) &&
3595                     !(mount_flags & EXT2_MF_READONLY) && mntpt[0]) {
3596                         fd = open(mntpt, O_RDONLY);
3597                         if (fd >= 0)
3598                                 fsuuid = malloc(sizeof(*fsuuid) + UUID_SIZE);
3599                         if (fsuuid) {
3600                                 fsuuid->fsu_len = UUID_SIZE;
3601                                 fsuuid->fsu_flags = 0;
3602                                 ret = ioctl(fd, EXT4_IOC_GETFSUUID, fsuuid);
3603                                 if (ret || fsuuid->fsu_len != UUID_SIZE) {
3604                                         free(fsuuid);
3605                                         fsuuid = NULL;
3606                                 }
3607                         }
3608                 }
3609 #endif
3610
3611                 memcpy(old_uuid, fsuuid ? fsuuid->fsu_uuid : sb->s_uuid,
3612                        UUID_SIZE);
3613                 if ((strcasecmp(requested_uuid, "null") == 0) ||
3614                     (strcasecmp(requested_uuid, "clear") == 0)) {
3615                         uuid_clear(new_uuid);
3616                 } else if (strcasecmp(requested_uuid, "time") == 0) {
3617                         uuid_generate_time(new_uuid);
3618                 } else if (strcasecmp(requested_uuid, "random") == 0) {
3619                         uuid_generate(new_uuid);
3620                 } else if (uuid_parse(requested_uuid, new_uuid)) {
3621                         com_err(program_name, 0, "%s",
3622                                 _("Invalid UUID format\n"));
3623                         rc = 1;
3624                         goto closefs;
3625                 }
3626
3627                 ret = -1;
3628 #ifdef __linux__
3629                 if (fsuuid) {
3630                         fsuuid->fsu_len = UUID_SIZE;
3631                         fsuuid->fsu_flags = 0;
3632                         memcpy(&fsuuid->fsu_uuid, new_uuid, UUID_SIZE);
3633                         ret = ioctl(fd, EXT4_IOC_SETFSUUID, fsuuid);
3634                 }
3635 #endif
3636                 /*
3637                  * If we can't set the UUID via the ioctl, fall
3638                  * back to directly modifying the superblock
3639                  .*/
3640                 if (ret) {
3641                         memcpy(sb->s_uuid, new_uuid, UUID_SIZE);
3642                         ext2fs_init_csum_seed(fs);
3643                         if (set_csum) {
3644                                 for (i = 0; i < fs->group_desc_count; i++)
3645                                         ext2fs_group_desc_csum_set(fs, i);
3646                                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3647                         }
3648                         ext2fs_mark_super_dirty(fs);
3649                 }
3650
3651                 /* If this is a journal dev, we need to copy UUID into jsb */
3652                 if (!(rc = get_journal_sb(fs, buf))) {
3653                         journal_superblock_t *jsb;
3654
3655                         jsb = (journal_superblock_t *) buf;
3656                         fputs(_("Need to update journal superblock.\n"), stdout);
3657                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
3658
3659                         /* Writeback the journal superblock */
3660                         if ((rc = io_channel_write_blk64(fs->io,
3661                                 ext2fs_journal_sb_start(fs->blocksize),
3662                                         -SUPERBLOCK_SIZE, buf)))
3663                                 goto closefs;
3664                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
3665                         goto closefs;
3666                 else {
3667                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
3668
3669                         if ((rc = fs_update_journal_user(sb, old_uuid)))
3670                                 goto closefs;
3671                 }
3672         }
3673
3674         if (I_flag) {
3675                 if (mount_flags & EXT2_MF_MOUNTED) {
3676                         fputs(_("The inode size may only be "
3677                                 "changed when the filesystem is "
3678                                 "unmounted.\n"), stderr);
3679                         rc = 1;
3680                         goto closefs;
3681                 }
3682                 if (ext2fs_has_feature_flex_bg(fs->super)) {
3683                         fputs(_("Changing the inode size not supported for "
3684                                 "filesystems with the flex_bg\n"
3685                                 "feature enabled.\n"),
3686                               stderr);
3687                         rc = 1;
3688                         goto closefs;
3689                 }
3690                 /*
3691                  * We want to update group descriptor also
3692                  * with the new free inode count
3693                  */
3694                 if (rewrite_checksums)
3695                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3696                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
3697                 retval = resize_inode(fs, new_inode_size);
3698                 if (rewrite_checksums)
3699                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
3700                 if (retval == 0) {
3701                         printf(_("Setting inode size %lu\n"),
3702                                                         new_inode_size);
3703                         rewrite_checksums = REWRITE_ALL;
3704                 } else {
3705                         printf("%s", _("Failed to change inode size\n"));
3706                         rc = 1;
3707                         goto closefs;
3708                 }
3709         }
3710
3711         if (rewrite_checksums) {
3712                 retval = rewrite_metadata_checksums(fs, rewrite_checksums);
3713                 if (retval != 0) {
3714                         printf("Failed to rewrite metadata checksums\n");
3715                         rc = 1;
3716                         goto closefs;
3717                 }
3718         }
3719
3720         if (l_flag)
3721                 list_super(sb);
3722         if (stride_set) {
3723                 sb->s_raid_stride = stride;
3724                 ext2fs_mark_super_dirty(fs);
3725                 printf(_("Setting stride size to %d\n"), stride);
3726         }
3727         if (stripe_width_set) {
3728                 sb->s_raid_stripe_width = stripe_width;
3729                 ext2fs_mark_super_dirty(fs);
3730                 printf(_("Setting stripe width to %d\n"), stripe_width);
3731         }
3732         if (ext_mount_opts) {
3733                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
3734                         sizeof(fs->super->s_mount_opts));
3735                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3736                 ext2fs_mark_super_dirty(fs);
3737                 printf(_("Setting extended default mount options to '%s'\n"),
3738                        ext_mount_opts);
3739                 free(ext_mount_opts);
3740         }
3741
3742         free(device_name);
3743         remove_error_table(&et_ext2_error_table);
3744
3745 closefs:
3746         if (fd >= 0)
3747                 close(fd);
3748         if (fsuuid)
3749                 free(fsuuid);
3750         if (rc) {
3751                 ext2fs_mmp_stop(fs);
3752 #ifndef BUILD_AS_LIB
3753                 exit(1);
3754 #endif
3755         }
3756
3757         if (feature_64bit)
3758                 convert_64bit(fs, feature_64bit);
3759
3760         retval = ext2fs_close_free(&fs);
3761         if (retval) {
3762                 com_err("tune2fs", retval,
3763                         _("while writing out and closing file system"));
3764                 rc = 1;
3765         }
3766
3767         return rc;
3768 }