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 #endif
  48 #include <string.h>
  49 #include <time.h>
  50 #include <unistd.h>
  51 #include <sys/types.h>
  52 #include <libgen.h>
  53 #include <limits.h>
  54
  55 #include "ext2fs/ext2_fs.h"
  56 #include "ext2fs/ext2fs.h"
  57 #include "et/com_err.h"
  58 #include "uuid/uuid.h"
  59 #include "e2p/e2p.h"
  60 #include "jfs_user.h"
  61 #include "util.h"
  62 #include "blkid/blkid.h"
  63 #include "quota/quotaio.h"
  64
  65 #include "../version.h"
  66 #include "nls-enable.h"
  67
  68 #define QOPT_ENABLE     (1)
  69 #define QOPT_DISABLE    (-1)
  70
  71 extern int ask_yn(const char *string, int def);
  72
  73 const char *program_name = "tune2fs";
  74 char *device_name;
  75 char *new_label, *new_last_mounted, *new_UUID;
  76 char *io_options;
  77 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  78 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  79 static int I_flag;
  80 static int clear_mmp;
  81 static time_t last_check_time;
  82 static int print_label;
  83 static int max_mount_count, mount_count, mount_flags;
  84 static unsigned long interval;
  85 static blk64_t reserved_blocks;
  86 static double reserved_ratio;
  87 static unsigned long resgid, resuid;
  88 static unsigned short errors;
  89 static int open_flag;
  90 static char *features_cmd;
  91 static char *mntopts_cmd;
  92 static int stride, stripe_width;
  93 static int stride_set, stripe_width_set;
  94 static char *extended_cmd;
  95 static unsigned long new_inode_size;
  96 static char *ext_mount_opts;
  97 static int usrquota, grpquota;
  98 static int rewrite_checksums;
  99
 100 int journal_size, journal_flags;
 101 char *journal_device;
 102 static blk64_t journal_location = ~0LL;
 103
 104 static struct list_head blk_move_list;
 105
 106 struct blk_move {
 107         struct list_head list;
 108         blk64_t old_loc;
 109         blk64_t new_loc;
 110 };
 111
 112
 113 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
 114 static const char *please_dir_fsck =
 115                 N_("Please run e2fsck -D on the filesystem.\n");
 116
 117 #ifdef CONFIG_BUILD_FINDFS
 118 void do_findfs(int argc, char **argv);
 119 #endif
 120
 121 static void usage(void)
 122 {
 123         fprintf(stderr,
 124                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
 125                   "[-g group]\n"
 126                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 127                   "\t[-m reserved_blocks_percent] "
 128                   "[-o [^]mount_options[,...]] [-p mmp_update_interval]\n"
 129                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count] "
 130                   "[-L volume_label]\n"
 131                   "\t[-M last_mounted_dir] [-O [^]feature[,...]]\n"
 132 #ifdef CONFIG_QUOTA
 133                   "\t[-Q quota_options]\n"
 134 #endif
 135                   "\t[-E extended-option[,...]] [-T last_check_time] "
 136                   "[-U UUID]\n\t[ -I new_inode_size ] device\n"), program_name);
 137         exit(1);
 138 }
 139
 140 static __u32 ok_features[3] = {
 141         /* Compat */
 142         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 143                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 144         /* Incompat */
 145         EXT2_FEATURE_INCOMPAT_FILETYPE |
 146                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 147                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 148                 EXT4_FEATURE_INCOMPAT_MMP,
 149         /* R/O compat */
 150         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 151                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 152                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 153                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 154                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 155                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 156 #ifdef CONFIG_QUOTA
 157                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 158 #endif
 159                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
 160 };
 161
 162 static __u32 clear_ok_features[3] = {
 163         /* Compat */
 164         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 165                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 166                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 167         /* Incompat */
 168         EXT2_FEATURE_INCOMPAT_FILETYPE |
 169                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 170                 EXT4_FEATURE_INCOMPAT_MMP,
 171         /* R/O compat */
 172         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 173                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 174                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 175                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 176                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 177 #ifdef CONFIG_QUOTA
 178                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 179 #endif
 180                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
 181 };
 182
 183 /**
 184  * Try to get journal super block if any
 185  */
 186 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 187 {
 188         int retval;
 189         journal_superblock_t *jsb;
 190
 191         if (!(jfs->super->s_feature_incompat &
 192             EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
 193                 return EXT2_ET_UNSUPP_FEATURE;
 194         }
 195
 196         /* Get the journal superblock */
 197         if ((retval = io_channel_read_blk64(jfs->io,
 198             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 199                 com_err(program_name, retval, "%s",
 200                 _("while reading journal superblock"));
 201                 return retval;
 202         }
 203
 204         jsb = (journal_superblock_t *) buf;
 205         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 206             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 207                 fputs(_("Journal superblock not found!\n"), stderr);
 208                 return EXT2_ET_BAD_MAGIC;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 215                           int nr_users)
 216 {
 217         int i;
 218         for (i = 0; i < nr_users; i++) {
 219                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 220                         return &s_users[i * UUID_SIZE];
 221         }
 222
 223         return NULL;
 224 }
 225
 226 /*
 227  * Remove an external journal from the filesystem
 228  */
 229 static int remove_journal_device(ext2_filsys fs)
 230 {
 231         char            *journal_path;
 232         ext2_filsys     jfs;
 233         char            buf[SUPERBLOCK_SIZE];
 234         journal_superblock_t    *jsb;
 235         int             i, nr_users;
 236         errcode_t       retval;
 237         int             commit_remove_journal = 0;
 238         io_manager      io_ptr;
 239
 240         if (f_flag)
 241                 commit_remove_journal = 1; /* force removal even if error */
 242
 243         uuid_unparse(fs->super->s_journal_uuid, buf);
 244         journal_path = blkid_get_devname(NULL, "UUID", buf);
 245
 246         if (!journal_path) {
 247                 journal_path =
 248                         ext2fs_find_block_device(fs->super->s_journal_dev);
 249                 if (!journal_path)
 250                         goto no_valid_journal;
 251         }
 252
 253 #ifdef CONFIG_TESTIO_DEBUG
 254         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 255                 io_ptr = test_io_manager;
 256                 test_io_backing_manager = unix_io_manager;
 257         } else
 258 #endif
 259                 io_ptr = unix_io_manager;
 260         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 261                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 262                              fs->blocksize, io_ptr, &jfs);
 263         if (retval) {
 264                 com_err(program_name, retval, "%s",
 265                         _("while trying to open external journal"));
 266                 goto no_valid_journal;
 267         }
 268
 269         if ((retval = get_journal_sb(jfs, buf))) {
 270                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 271                         fprintf(stderr, _("%s is not a journal device.\n"),
 272                                 journal_path);
 273                 goto no_valid_journal;
 274         }
 275
 276         jsb = (journal_superblock_t *) buf;
 277         /* Find the filesystem UUID */
 278         nr_users = ntohl(jsb->s_nr_users);
 279
 280         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 281                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 282                       stderr);
 283                 commit_remove_journal = 1;
 284                 goto no_valid_journal;
 285         }
 286         nr_users--;
 287         for (i = 0; i < nr_users; i++)
 288                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 289         jsb->s_nr_users = htonl(nr_users);
 290
 291         /* Write back the journal superblock */
 292         retval = io_channel_write_blk64(jfs->io,
 293                                         ext2fs_journal_sb_start(fs->blocksize),
 294                                         -SUPERBLOCK_SIZE, buf);
 295         if (retval) {
 296                 com_err(program_name, retval,
 297                         "while writing journal superblock.");
 298                 goto no_valid_journal;
 299         }
 300
 301         commit_remove_journal = 1;
 302
 303 no_valid_journal:
 304         if (commit_remove_journal == 0) {
 305                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 306                         "Use -f option to remove missing journal device.\n"),
 307                       stderr);
 308                 return 1;
 309         }
 310         fs->super->s_journal_dev = 0;
 311         uuid_clear(fs->super->s_journal_uuid);
 312         ext2fs_mark_super_dirty(fs);
 313         fputs(_("Journal removed\n"), stdout);
 314         free(journal_path);
 315
 316         return 0;
 317 }
 318
 319 /* Helper function for remove_journal_inode */
 320 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 321                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 322                                blk64_t ref_block EXT2FS_ATTR((unused)),
 323                                int ref_offset EXT2FS_ATTR((unused)),
 324                                void *private EXT2FS_ATTR((unused)))
 325 {
 326         blk64_t block;
 327         int     group;
 328
 329         block = *blocknr;
 330         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 331         group = ext2fs_group_of_blk2(fs, block);
 332         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 333         ext2fs_group_desc_csum_set(fs, group);
 334         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 335         return 0;
 336 }
 337
 338 /*
 339  * Remove the journal inode from the filesystem
 340  */
 341 static errcode_t remove_journal_inode(ext2_filsys fs)
 342 {
 343         struct ext2_inode       inode;
 344         errcode_t               retval;
 345         ino_t                   ino = fs->super->s_journal_inum;
 346
 347         retval = ext2fs_read_inode(fs, ino,  &inode);
 348         if (retval) {
 349                 com_err(program_name, retval, "%s",
 350                         _("while reading journal inode"));
 351                 return retval;
 352         }
 353         if (ino == EXT2_JOURNAL_INO) {
 354                 retval = ext2fs_read_bitmaps(fs);
 355                 if (retval) {
 356                         com_err(program_name, retval, "%s",
 357                                 _("while reading bitmaps"));
 358                         return retval;
 359                 }
 360                 retval = ext2fs_block_iterate3(fs, ino,
 361                                                BLOCK_FLAG_READ_ONLY, NULL,
 362                                                release_blocks_proc, NULL);
 363                 if (retval) {
 364                         com_err(program_name, retval, "%s",
 365                                 _("while clearing journal inode"));
 366                         return retval;
 367                 }
 368                 memset(&inode, 0, sizeof(inode));
 369                 ext2fs_mark_bb_dirty(fs);
 370                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 371         } else
 372                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 373         retval = ext2fs_write_inode(fs, ino, &inode);
 374         if (retval) {
 375                 com_err(program_name, retval, "%s",
 376                         _("while writing journal inode"));
 377                 return retval;
 378         }
 379         fs->super->s_journal_inum = 0;
 380         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 381         ext2fs_mark_super_dirty(fs);
 382
 383         return 0;
 384 }
 385
 386 /*
 387  * Update the default mount options
 388  */
 389 static int update_mntopts(ext2_filsys fs, char *mntopts)
 390 {
 391         struct ext2_super_block *sb = fs->super;
 392
 393         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 394                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 395                         mntopts);
 396                 return 1;
 397         }
 398         ext2fs_mark_super_dirty(fs);
 399
 400         return 0;
 401 }
 402
 403 static int check_fsck_needed(ext2_filsys fs)
 404 {
 405         if (fs->super->s_state & EXT2_VALID_FS)
 406                 return 0;
 407         printf("\n%s\n", _(please_fsck));
 408         if (mount_flags & EXT2_MF_READONLY)
 409                 printf("%s", _("(and reboot afterwards!)\n"));
 410         return 1;
 411 }
 412
 413 static void request_dir_fsck_afterwards(ext2_filsys fs)
 414 {
 415         static int requested;
 416
 417         if (requested++)
 418                 return;
 419         fs->super->s_state &= ~EXT2_VALID_FS;
 420         printf("\n%s\n", _(please_dir_fsck));
 421         if (mount_flags & EXT2_MF_READONLY)
 422                 printf("%s", _("(and reboot afterwards!)\n"));
 423 }
 424
 425 static void request_fsck_afterwards(ext2_filsys fs)
 426 {
 427         static int requested = 0;
 428
 429         if (requested++)
 430                 return;
 431         fs->super->s_state &= ~EXT2_VALID_FS;
 432         printf("\n%s\n", _(please_fsck));
 433         if (mount_flags & EXT2_MF_READONLY)
 434                 printf("%s", _("(and reboot afterwards!)\n"));
 435 }
 436
 437 /* Rewrite extents */
 438 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 439                                  struct ext2_inode *inode)
 440 {
 441         ext2_extent_handle_t    handle;
 442         struct ext2fs_extent    extent;
 443         int                     op = EXT2_EXTENT_ROOT;
 444         errcode_t               errcode;
 445
 446         if (!(inode->i_flags & EXT4_EXTENTS_FL))
 447                 return 0;
 448
 449         errcode = ext2fs_extent_open(fs, ino, &handle);
 450         if (errcode)
 451                 return errcode;
 452
 453         while (1) {
 454                 errcode = ext2fs_extent_get(handle, op, &extent);
 455                 if (errcode)
 456                         break;
 457
 458                 /* Root node is in the separately checksummed inode */
 459                 if (op == EXT2_EXTENT_ROOT) {
 460                         op = EXT2_EXTENT_NEXT;
 461                         continue;
 462                 }
 463                 op = EXT2_EXTENT_NEXT;
 464
 465                 /* Only visit the first extent in each extent block */
 466                 if (extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)
 467                         continue;
 468                 errcode = ext2fs_extent_replace(handle, 0, &extent);
 469                 if (errcode)
 470                         break;
 471         }
 472
 473         /* Ok if we run off the end */
 474         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 475                 errcode = 0;
 476         return errcode;
 477 }
 478
 479 /*
 480  * Rewrite directory blocks with checksums
 481  */
 482 struct rewrite_dir_context {
 483         char *buf;
 484         errcode_t errcode;
 485         ext2_ino_t dir;
 486         int is_htree;
 487 };
 488
 489 static int rewrite_dir_block(ext2_filsys fs,
 490                              blk64_t    *blocknr,
 491                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 492                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 493                              int        ref_offset EXT2FS_ATTR((unused)),
 494                              void       *priv_data)
 495 {
 496         struct ext2_dx_countlimit *dcl = NULL;
 497         struct rewrite_dir_context *ctx = priv_data;
 498         int dcl_offset, changed = 0;
 499
 500         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 501                                               ctx->dir);
 502         if (ctx->errcode)
 503                 return BLOCK_ABORT;
 504
 505         /* if htree node... */
 506         if (ctx->is_htree)
 507                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 508                                          &dcl, &dcl_offset);
 509         if (dcl) {
 510                 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 511                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
 512                         /* Ensure limit is the max size */
 513                         int max_entries = (fs->blocksize - dcl_offset) /
 514                                           sizeof(struct ext2_dx_entry);
 515                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 516                                 changed = 1;
 517                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 518                         }
 519                 } else {
 520                         /* If htree block is full then rebuild the dir */
 521                         if (ext2fs_le16_to_cpu(dcl->count) ==
 522                             ext2fs_le16_to_cpu(dcl->limit)) {
 523                                 request_dir_fsck_afterwards(fs);
 524                                 return 0;
 525                         }
 526                         /*
 527                          * Ensure dcl->limit is small enough to leave room for
 528                          * the checksum tail.
 529                          */
 530                         int max_entries = (fs->blocksize - (dcl_offset +
 531                                                 sizeof(struct ext2_dx_tail))) /
 532                                           sizeof(struct ext2_dx_entry);
 533                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 534                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 535                         /* Always rewrite checksum */
 536                         changed = 1;
 537                 }
 538         } else {
 539                 unsigned int rec_len, name_size;
 540                 char *top = ctx->buf + fs->blocksize;
 541                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 542                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 543
 544                 /* Find last and penultimate dirent */
 545                 while ((char *)de < top) {
 546                         penultimate_de = last_de;
 547                         last_de = de;
 548                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 549                         if (!ctx->errcode && !rec_len)
 550                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 551                         if (ctx->errcode)
 552                                 return BLOCK_ABORT;
 553                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 554                 }
 555                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 556                 if (ctx->errcode)
 557                         return BLOCK_ABORT;
 558                 name_size = ext2fs_dirent_name_len(last_de);
 559
 560                 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 561                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
 562                         if (!penultimate_de)
 563                                 return 0;
 564                         if (last_de->inode ||
 565                             name_size ||
 566                             rec_len != sizeof(struct ext2_dir_entry_tail))
 567                                 return 0;
 568                         /*
 569                          * The last dirent is unused and the right length to
 570                          * have stored a checksum.  Erase it.
 571                          */
 572                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 573                                                           &rec_len);
 574                         if (!rec_len)
 575                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 576                         if (ctx->errcode)
 577                                 return BLOCK_ABORT;
 578                         ext2fs_set_rec_len(fs, rec_len +
 579                                         sizeof(struct ext2_dir_entry_tail),
 580                                         penultimate_de);
 581                         changed = 1;
 582                 } else {
 583                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 584                         struct ext2_dir_entry_tail *t;
 585
 586                         /*
 587                          * If the last dirent looks like the tail, just update
 588                          * the checksum.
 589                          */
 590                         if (!last_de->inode &&
 591                             rec_len == csum_size) {
 592                                 t = (struct ext2_dir_entry_tail *)last_de;
 593                                 t->det_reserved_name_len =
 594                                                 EXT2_DIR_NAME_LEN_CSUM;
 595                                 changed = 1;
 596                                 goto out;
 597                         }
 598                         if (name_size & 3)
 599                                 name_size = (name_size & ~3) + 4;
 600                         /* If there's not enough space for the tail, e2fsck */
 601                         if (rec_len <= (8 + name_size + csum_size)) {
 602                                 request_dir_fsck_afterwards(fs);
 603                                 return 0;
 604                         }
 605                         /* Shorten that last de and insert the tail */
 606                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 607                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 608                         ext2fs_initialize_dirent_tail(fs, t);
 609
 610                         /* Always update checksum */
 611                         changed = 1;
 612                 }
 613         }
 614
 615 out:
 616         if (!changed)
 617                 return 0;
 618
 619         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 620                                                0, ctx->dir);
 621         if (ctx->errcode)
 622                 return BLOCK_ABORT;
 623
 624         return 0;
 625 }
 626
 627 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 628                                    struct ext2_inode *inode)
 629 {
 630         errcode_t       retval;
 631         struct rewrite_dir_context ctx;
 632
 633         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 634         if (retval)
 635                 return retval;
 636
 637         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 638         ctx.dir = dir;
 639         ctx.errcode = 0;
 640         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 641                                                 BLOCK_FLAG_DATA_ONLY,
 642                                        0, rewrite_dir_block, &ctx);
 643
 644         ext2fs_free_mem(&ctx.buf);
 645         if (retval)
 646                 return retval;
 647
 648         return ctx.errcode;
 649 }
 650
 651 /*
 652  * Forcibly set checksums in all inodes.
 653  */
 654 static void rewrite_inodes(ext2_filsys fs)
 655 {
 656         int length = EXT2_INODE_SIZE(fs->super);
 657         struct ext2_inode *inode, *zero;
 658         char            *ea_buf;
 659         ext2_inode_scan scan;
 660         errcode_t       retval;
 661         ext2_ino_t      ino;
 662         blk64_t         file_acl_block;
 663         int             inode_dirty;
 664
 665         if (fs->super->s_creator_os != EXT2_OS_LINUX)
 666                 return;
 667
 668         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 669         if (retval) {
 670                 com_err("set_csum", retval, "while opening inode scan");
 671                 exit(1);
 672         }
 673
 674         retval = ext2fs_get_mem(length, &inode);
 675         if (retval) {
 676                 com_err("set_csum", retval, "while allocating memory");
 677                 exit(1);
 678         }
 679
 680         retval = ext2fs_get_memzero(length, &zero);
 681         if (retval) {
 682                 com_err("set_csum", retval, "while allocating memory");
 683                 exit(1);
 684         }
 685
 686         retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
 687         if (retval) {
 688                 com_err("set_csum", retval, "while allocating memory");
 689                 exit(1);
 690         }
 691
 692         do {
 693                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 694                 if (retval) {
 695                         com_err("set_csum", retval, "while getting next inode");
 696                         exit(1);
 697                 }
 698                 if (!ino)
 699                         break;
 700                 if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 701                         inode_dirty = 1;
 702                 } else {
 703                         if (memcmp(inode, zero, length) != 0) {
 704                                 memset(inode, 0, length);
 705                                 inode_dirty = 1;
 706                         } else {
 707                                 inode_dirty = 0;
 708                         }
 709                 }
 710
 711                 if (inode_dirty) {
 712                         retval = ext2fs_write_inode_full(fs, ino, inode,
 713                                                          length);
 714                         if (retval) {
 715                                 com_err("set_csum", retval, "while writing "
 716                                         "inode");
 717                                 exit(1);
 718                         }
 719                 }
 720
 721                 retval = rewrite_extents(fs, ino, inode);
 722                 if (retval) {
 723                         com_err("rewrite_extents", retval,
 724                                 "while rewriting extents");
 725                         exit(1);
 726                 }
 727
 728                 if (LINUX_S_ISDIR(inode->i_mode) &&
 729                     ext2fs_inode_has_valid_blocks2(fs, inode)) {
 730                         retval = rewrite_directory(fs, ino, inode);
 731                         if (retval) {
 732                                 com_err("rewrite_directory", retval,
 733                                         "while rewriting directories");
 734                                 exit(1);
 735                         }
 736                 }
 737
 738                 file_acl_block = ext2fs_file_acl_block(fs, inode);
 739                 if (!file_acl_block)
 740                         continue;
 741                 retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
 742                 if (retval) {
 743                         com_err("rewrite_eablock", retval,
 744                                 "while rewriting extended attribute");
 745                         exit(1);
 746                 }
 747                 retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
 748                                                 ino);
 749                 if (retval) {
 750                         com_err("rewrite_eablock", retval,
 751                                 "while rewriting extended attribute");
 752                         exit(1);
 753                 }
 754         } while (ino);
 755
 756         ext2fs_free_mem(&zero);
 757         ext2fs_free_mem(&inode);
 758         ext2fs_free_mem(&ea_buf);
 759         ext2fs_close_inode_scan(scan);
 760 }
 761
 762 static void rewrite_metadata_checksums(ext2_filsys fs)
 763 {
 764         errcode_t retval;
 765         dgrp_t i;
 766
 767         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 768         ext2fs_init_csum_seed(fs);
 769         for (i = 0; i < fs->group_desc_count; i++)
 770                 ext2fs_group_desc_csum_set(fs, i);
 771         retval = ext2fs_read_bitmaps(fs);
 772         if (retval) {
 773                 com_err("rewrite_metadata_checksums", retval,
 774                         "while reading bitmaps");
 775                 exit(1);
 776         }
 777         rewrite_inodes(fs);
 778         ext2fs_mark_ib_dirty(fs);
 779         ext2fs_mark_bb_dirty(fs);
 780         ext2fs_mmp_update2(fs, 1);
 781         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 782         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 783         if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 784                                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
 785                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 786         else
 787                 fs->super->s_checksum_type = 0;
 788         ext2fs_mark_super_dirty(fs);
 789 }
 790
 791 static void enable_uninit_bg(ext2_filsys fs)
 792 {
 793         struct ext2_group_desc *gd;
 794         dgrp_t i;
 795
 796         for (i = 0; i < fs->group_desc_count; i++) {
 797                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 798                 gd->bg_itable_unused = 0;
 799                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 800                 ext2fs_group_desc_csum_set(fs, i);
 801         }
 802         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 803 }
 804
 805 static errcode_t zero_empty_inodes(ext2_filsys fs)
 806 {
 807         int length = EXT2_INODE_SIZE(fs->super);
 808         struct ext2_inode *inode = NULL;
 809         ext2_inode_scan scan;
 810         errcode_t       retval;
 811         ext2_ino_t      ino;
 812
 813         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 814         if (retval)
 815                 goto out;
 816
 817         retval = ext2fs_get_mem(length, &inode);
 818         if (retval)
 819                 goto out;
 820
 821         do {
 822                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 823                 if (retval)
 824                         goto out;
 825                 if (!ino)
 826                         break;
 827                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 828                         memset(inode, 0, length);
 829                         retval = ext2fs_write_inode_full(fs, ino, inode,
 830                                                          length);
 831                         if (retval)
 832                                 goto out;
 833                 }
 834         } while (1);
 835
 836 out:
 837         ext2fs_free_mem(&inode);
 838         ext2fs_close_inode_scan(scan);
 839         return retval;
 840 }
 841
 842 static void disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 843 {
 844         struct ext2_group_desc *gd;
 845         dgrp_t i;
 846         errcode_t retval;
 847         blk64_t b, c, d;
 848
 849         /* Load bitmaps to ensure that the uninit ones get written out */
 850         fs->super->s_feature_ro_compat |= csum_feature_flag;
 851         retval = ext2fs_read_bitmaps(fs);
 852         if (retval) {
 853                 com_err("disable_uninit_bg", retval,
 854                         "while reading bitmaps");
 855                 return;
 856         }
 857         ext2fs_mark_ib_dirty(fs);
 858         ext2fs_mark_bb_dirty(fs);
 859         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 860
 861         /* If we're only turning off uninit_bg, zero the inodes */
 862         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 863                 retval = zero_empty_inodes(fs);
 864                 if (retval) {
 865                         com_err("disable_uninit_bg", retval,
 866                                 "while zeroing unused inodes");
 867                         request_fsck_afterwards(fs);
 868                 }
 869         }
 870
 871         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
 872         for (i = 0; i < fs->group_desc_count; i++) {
 873                 b = ext2fs_block_bitmap_loc(fs, i);
 874                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 875                 b = ext2fs_inode_bitmap_loc(fs, i);
 876                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 877
 878                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
 879                 if (retval == 0 && b)
 880                         ext2fs_mark_block_bitmap2(fs->block_map, b);
 881                 if (retval == 0 && c)
 882                         ext2fs_mark_block_bitmap2(fs->block_map, c);
 883                 if (retval == 0 && d)
 884                         ext2fs_mark_block_bitmap2(fs->block_map, d);
 885                 if (retval) {
 886                         com_err("disable_uninit_bg", retval,
 887                                 "while initializing block bitmaps");
 888                         request_fsck_afterwards(fs);
 889                 }
 890
 891                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 892                 gd->bg_itable_unused = 0;
 893                 gd->bg_flags = 0;
 894                 ext2fs_group_desc_csum_set(fs, i);
 895         }
 896         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 897         ext2fs_mark_super_dirty(fs);
 898 }
 899
 900 /*
 901  * Update the feature set as provided by the user.
 902  */
 903 static int update_feature_set(ext2_filsys fs, char *features)
 904 {
 905         struct ext2_super_block *sb = fs->super;
 906         __u32           old_features[3];
 907         int             type_err;
 908         unsigned int    mask_err;
 909
 910 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
 911                                 ((&sb->s_feature_compat)[(type)] & (mask)))
 912 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
 913                                  !((&sb->s_feature_compat)[(type)] & (mask)))
 914 #define FEATURE_CHANGED(type, mask) ((mask) & \
 915                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
 916
 917         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
 918         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
 919         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
 920
 921         if (e2p_edit_feature2(features, &sb->s_feature_compat,
 922                               ok_features, clear_ok_features,
 923                               &type_err, &mask_err)) {
 924                 if (!mask_err)
 925                         fprintf(stderr,
 926                                 _("Invalid filesystem option set: %s\n"),
 927                                 features);
 928                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
 929                         fprintf(stderr, _("Clearing filesystem feature '%s' "
 930                                           "not supported.\n"),
 931                                 e2p_feature2string(type_err &
 932                                                    E2P_FEATURE_TYPE_MASK,
 933                                                    mask_err));
 934                 else
 935                         fprintf(stderr, _("Setting filesystem feature '%s' "
 936                                           "not supported.\n"),
 937                                 e2p_feature2string(type_err, mask_err));
 938                 return 1;
 939         }
 940
 941         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
 942                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 943                     !(mount_flags & EXT2_MF_READONLY)) {
 944                         fputs(_("The has_journal feature may only be "
 945                                 "cleared when the filesystem is\n"
 946                                 "unmounted or mounted "
 947                                 "read-only.\n"), stderr);
 948                         return 1;
 949                 }
 950                 if ((sb->s_feature_incompat &
 951                     EXT3_FEATURE_INCOMPAT_RECOVER) &&
 952                     f_flag < 2) {
 953                         fputs(_("The needs_recovery flag is set.  "
 954                                 "Please run e2fsck before clearing\n"
 955                                 "the has_journal flag.\n"), stderr);
 956                         return 1;
 957                 }
 958                 if (sb->s_journal_inum) {
 959                         if (remove_journal_inode(fs))
 960                                 return 1;
 961                 }
 962                 if (sb->s_journal_dev) {
 963                         if (remove_journal_device(fs))
 964                                 return 1;
 965                 }
 966         }
 967
 968         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
 969                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
 970                 if (sb->s_feature_incompat &
 971                         EXT2_FEATURE_INCOMPAT_META_BG) {
 972                         fputs(_("Setting filesystem feature 'sparse_super' "
 973                                 "not supported\nfor filesystems with "
 974                                 "the meta_bg feature enabled.\n"),
 975                                 stderr);
 976                         return 1;
 977                 }
 978         }
 979
 980         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
 981                 int error;
 982
 983                 if ((mount_flags & EXT2_MF_MOUNTED) ||
 984                     (mount_flags & EXT2_MF_READONLY)) {
 985                         fputs(_("The multiple mount protection feature can't\n"
 986                                 "be set if the filesystem is mounted or\n"
 987                                 "read-only.\n"), stderr);
 988                         return 1;
 989                 }
 990
 991                 error = ext2fs_mmp_init(fs);
 992                 if (error) {
 993                         fputs(_("\nError while enabling multiple mount "
 994                                 "protection feature."), stderr);
 995                         return 1;
 996                 }
 997
 998                 /*
 999                  * We want to update group desc with the new free blocks count
1000                  */
1001                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1002
1003                 printf(_("Multiple mount protection has been enabled "
1004                          "with update interval %ds.\n"),
1005                        sb->s_mmp_update_interval);
1006         }
1007
1008         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1009                 int error;
1010
1011                 if (mount_flags & EXT2_MF_READONLY) {
1012                         fputs(_("The multiple mount protection feature cannot\n"
1013                                 "be disabled if the filesystem is readonly.\n"),
1014                                 stderr);
1015                         return 1;
1016                 }
1017
1018                 error = ext2fs_read_bitmaps(fs);
1019                 if (error) {
1020                         fputs(_("Error while reading bitmaps\n"), stderr);
1021                         return 1;
1022                 }
1023
1024                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1025                 if (error) {
1026                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1027
1028                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1029                                 printf(_("Magic number in MMP block does not "
1030                                          "match. expected: %x, actual: %x\n"),
1031                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1032                         else
1033                                 com_err(program_name, error, "%s",
1034                                         _("while reading MMP block."));
1035                         goto mmp_error;
1036                 }
1037
1038                 /* We need to force out the group descriptors as well */
1039                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1040                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1041 mmp_error:
1042                 sb->s_mmp_block = 0;
1043                 sb->s_mmp_update_interval = 0;
1044         }
1045
1046         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1047                 /*
1048                  * If adding a journal flag, let the create journal
1049                  * code below handle setting the flag and creating the
1050                  * journal.  We supply a default size if necessary.
1051                  */
1052                 if (!journal_size)
1053                         journal_size = -1;
1054                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1055         }
1056
1057         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1058                 if (!sb->s_def_hash_version)
1059                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1060                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1061                         uuid_generate((unsigned char *) sb->s_hash_seed);
1062         }
1063
1064         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1065                 if (ext2fs_check_desc(fs)) {
1066                         fputs(_("Clearing the flex_bg flag would "
1067                                 "cause the the filesystem to be\n"
1068                                 "inconsistent.\n"), stderr);
1069                         return 1;
1070                 }
1071         }
1072
1073         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1074                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1075                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1076                     !(mount_flags & EXT2_MF_READONLY)) {
1077                         fputs(_("The huge_file feature may only be "
1078                                 "cleared when the filesystem is\n"
1079                                 "unmounted or mounted "
1080                                 "read-only.\n"), stderr);
1081                         return 1;
1082                 }
1083         }
1084
1085         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1086                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1087                 if (check_fsck_needed(fs))
1088                         exit(1);
1089                 rewrite_checksums = 1;
1090                 /* metadata_csum supersedes uninit_bg */
1091                 fs->super->s_feature_ro_compat &=
1092                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1093
1094                 /* if uninit_bg was previously off, rewrite group desc */
1095                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1096                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1097                         enable_uninit_bg(fs);
1098
1099                 /*
1100                  * Since metadata_csum supersedes uninit_bg, pretend like
1101                  * uninit_bg has been off all along.
1102                  */
1103                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1104                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1105         }
1106
1107         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1108                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1109                 if (check_fsck_needed(fs))
1110                         exit(1);
1111                 rewrite_checksums = 1;
1112                 /*
1113                  * If we're turning off metadata_csum and not turning on
1114                  * uninit_bg, rewrite group desc.
1115                  */
1116                 if (!(fs->super->s_feature_ro_compat &
1117                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1118                         disable_uninit_bg(fs,
1119                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1120                 else
1121                         /*
1122                          * metadata_csum previously provided uninit_bg, so if
1123                          * we're also setting the uninit_bg feature bit,
1124                          * pretend like it was previously enabled.  Checksums
1125                          * will be rewritten with crc16 later.
1126                          */
1127                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1128                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1129         }
1130
1131         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1132                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1133                 /* Do not enable uninit_bg when metadata_csum enabled */
1134                 if (fs->super->s_feature_ro_compat &
1135                     EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
1136                         fs->super->s_feature_ro_compat &=
1137                                 ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1138                 else
1139                         enable_uninit_bg(fs);
1140         }
1141
1142         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1143                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1144                 disable_uninit_bg(fs,
1145                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1146
1147         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1148                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1149                 /*
1150                  * Set the Q_flag here and handle the quota options in the code
1151                  * below.
1152                  */
1153                 if (!Q_flag) {
1154                         Q_flag = 1;
1155                         /* Enable both user quota and group quota by default */
1156                         usrquota = QOPT_ENABLE;
1157                         grpquota = QOPT_ENABLE;
1158                 }
1159                 sb->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1160         }
1161
1162         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1163                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1164                 /*
1165                  * Set the Q_flag here and handle the quota options in the code
1166                  * below.
1167                  */
1168                 if (Q_flag)
1169                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1170                                 "arguments.\n"), stderr);
1171                 Q_flag = 1;
1172                 /* Disable both user quota and group quota by default */
1173                 usrquota = QOPT_DISABLE;
1174                 grpquota = QOPT_DISABLE;
1175         }
1176
1177         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1178             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1179              sb->s_feature_incompat))
1180                 ext2fs_update_dynamic_rev(fs);
1181
1182         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1183                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1184             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1185                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1186             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1187                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1188             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1189                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1190             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1191                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1192                 request_fsck_afterwards(fs);
1193
1194         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1195             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1196             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1197                 ext2fs_mark_super_dirty(fs);
1198
1199         return 0;
1200 }
1201
1202 /*
1203  * Add a journal to the filesystem.
1204  */
1205 static int add_journal(ext2_filsys fs)
1206 {
1207         unsigned long journal_blocks;
1208         errcode_t       retval;
1209         ext2_filsys     jfs;
1210         io_manager      io_ptr;
1211
1212         if (fs->super->s_feature_compat &
1213             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
1214                 fputs(_("The filesystem already has a journal.\n"), stderr);
1215                 goto err;
1216         }
1217         if (journal_device) {
1218                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1219                                         NULL))
1220                         proceed_question(-1);
1221                 check_mount(journal_device, 0, _("journal"));
1222 #ifdef CONFIG_TESTIO_DEBUG
1223                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1224                         io_ptr = test_io_manager;
1225                         test_io_backing_manager = unix_io_manager;
1226                 } else
1227 #endif
1228                         io_ptr = unix_io_manager;
1229                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1230                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1231                                      fs->blocksize, io_ptr, &jfs);
1232                 if (retval) {
1233                         com_err(program_name, retval,
1234                                 _("\n\twhile trying to open journal on %s\n"),
1235                                 journal_device);
1236                         goto err;
1237                 }
1238                 printf(_("Creating journal on device %s: "),
1239                        journal_device);
1240                 fflush(stdout);
1241
1242                 retval = ext2fs_add_journal_device(fs, jfs);
1243                 ext2fs_close_free(&jfs);
1244                 if (retval) {
1245                         com_err(program_name, retval,
1246                                 _("while adding filesystem to journal on %s"),
1247                                 journal_device);
1248                         goto err;
1249                 }
1250                 fputs(_("done\n"), stdout);
1251         } else if (journal_size) {
1252                 fputs(_("Creating journal inode: "), stdout);
1253                 fflush(stdout);
1254                 journal_blocks = figure_journal_size(journal_size, fs);
1255
1256                 if (journal_location_string)
1257                         journal_location =
1258                                 parse_num_blocks2(journal_location_string,
1259                                                   fs->super->s_log_block_size);
1260                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1261                                                    journal_location,
1262                                                    journal_flags);
1263                 if (retval) {
1264                         fprintf(stderr, "\n");
1265                         com_err(program_name, retval, "%s",
1266                                 _("\n\twhile trying to create journal file"));
1267                         return retval;
1268                 } else
1269                         fputs(_("done\n"), stdout);
1270                 /*
1271                  * If the filesystem wasn't mounted, we need to force
1272                  * the block group descriptors out.
1273                  */
1274                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1275                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1276         }
1277         print_check_message(fs->super->s_max_mnt_count,
1278                             fs->super->s_checkinterval);
1279         return 0;
1280
1281 err:
1282         free(journal_device);
1283         return 1;
1284 }
1285
1286 static void handle_quota_options(ext2_filsys fs)
1287 {
1288         quota_ctx_t qctx;
1289         ext2_ino_t qf_ino;
1290
1291         if (!usrquota && !grpquota)
1292                 /* Nothing to do. */
1293                 return;
1294
1295         quota_init_context(&qctx, fs, -1);
1296
1297         if (usrquota == QOPT_ENABLE || grpquota == QOPT_ENABLE)
1298                 quota_compute_usage(qctx);
1299
1300         if (usrquota == QOPT_ENABLE && !fs->super->s_usr_quota_inum) {
1301                 if ((qf_ino = quota_file_exists(fs, USRQUOTA,
1302                                                 QFMT_VFS_V1)) > 0)
1303                         quota_update_limits(qctx, qf_ino, USRQUOTA);
1304                 quota_write_inode(qctx, USRQUOTA);
1305         } else if (usrquota == QOPT_DISABLE) {
1306                 quota_remove_inode(fs, USRQUOTA);
1307         }
1308
1309         if (grpquota == QOPT_ENABLE && !fs->super->s_grp_quota_inum) {
1310                 if ((qf_ino = quota_file_exists(fs, GRPQUOTA,
1311                                                 QFMT_VFS_V1)) > 0)
1312                         quota_update_limits(qctx, qf_ino, GRPQUOTA);
1313                 quota_write_inode(qctx, GRPQUOTA);
1314         } else if (grpquota == QOPT_DISABLE) {
1315                 quota_remove_inode(fs, GRPQUOTA);
1316         }
1317
1318         quota_release_context(&qctx);
1319
1320         if ((usrquota == QOPT_ENABLE) || (grpquota == QOPT_ENABLE)) {
1321                 fs->super->s_feature_ro_compat |= EXT4_FEATURE_RO_COMPAT_QUOTA;
1322                 ext2fs_mark_super_dirty(fs);
1323         } else if (!fs->super->s_usr_quota_inum &&
1324                    !fs->super->s_grp_quota_inum) {
1325                 fs->super->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1326                 ext2fs_mark_super_dirty(fs);
1327         }
1328
1329         return;
1330 }
1331
1332 #ifdef CONFIG_QUOTA
1333 static void parse_quota_opts(const char *opts)
1334 {
1335         char    *buf, *token, *next, *p;
1336         int     len;
1337
1338         len = strlen(opts);
1339         buf = malloc(len+1);
1340         if (!buf) {
1341                 fputs(_("Couldn't allocate memory to parse quota "
1342                         "options!\n"), stderr);
1343                 exit(1);
1344         }
1345         strcpy(buf, opts);
1346         for (token = buf; token && *token; token = next) {
1347                 p = strchr(token, ',');
1348                 next = 0;
1349                 if (p) {
1350                         *p = 0;
1351                         next = p+1;
1352                 }
1353
1354                 if (strcmp(token, "usrquota") == 0) {
1355                         usrquota = QOPT_ENABLE;
1356                 } else if (strcmp(token, "^usrquota") == 0) {
1357                         usrquota = QOPT_DISABLE;
1358                 } else if (strcmp(token, "grpquota") == 0) {
1359                         grpquota = QOPT_ENABLE;
1360                 } else if (strcmp(token, "^grpquota") == 0) {
1361                         grpquota = QOPT_DISABLE;
1362                 } else {
1363                         fputs(_("\nBad quota options specified.\n\n"
1364                                 "Following valid quota options are available "
1365                                 "(pass by separating with comma):\n"
1366                                 "\t[^]usrquota\n"
1367                                 "\t[^]grpquota\n"
1368                                 "\n\n"), stderr);
1369                         free(buf);
1370                         exit(1);
1371                 }
1372         }
1373         free(buf);
1374 }
1375 #endif
1376
1377 static void parse_e2label_options(int argc, char ** argv)
1378 {
1379         if ((argc < 2) || (argc > 3)) {
1380                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1381                 exit(1);
1382         }
1383         io_options = strchr(argv[1], '?');
1384         if (io_options)
1385                 *io_options++ = 0;
1386         device_name = blkid_get_devname(NULL, argv[1], NULL);
1387         if (!device_name) {
1388                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1389                         argv[1]);
1390                 exit(1);
1391         }
1392         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1393         if (argc == 3) {
1394                 open_flag |= EXT2_FLAG_RW;
1395                 L_flag = 1;
1396                 new_label = argv[2];
1397         } else
1398                 print_label++;
1399 }
1400
1401 static time_t parse_time(char *str)
1402 {
1403         struct  tm      ts;
1404
1405         if (strcmp(str, "now") == 0) {
1406                 return (time(0));
1407         }
1408         memset(&ts, 0, sizeof(ts));
1409 #ifdef HAVE_STRPTIME
1410         strptime(str, "%Y%m%d%H%M%S", &ts);
1411 #else
1412         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1413                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1414         ts.tm_year -= 1900;
1415         ts.tm_mon -= 1;
1416         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1417             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1418             ts.tm_min > 59 || ts.tm_sec > 61)
1419                 ts.tm_mday = 0;
1420 #endif
1421         if (ts.tm_mday == 0) {
1422                 com_err(program_name, 0,
1423                         _("Couldn't parse date/time specifier: %s"),
1424                         str);
1425                 usage();
1426         }
1427         ts.tm_isdst = -1;
1428         return (mktime(&ts));
1429 }
1430
1431 static void parse_tune2fs_options(int argc, char **argv)
1432 {
1433         int c;
1434         char *tmp;
1435         struct group *gr;
1436         struct passwd *pw;
1437         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:";
1438
1439 #ifdef CONFIG_QUOTA
1440         strcat(optstring, "Q:");
1441 #endif
1442         open_flag = 0;
1443
1444         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1445         while ((c = getopt(argc, argv, optstring)) != EOF)
1446                 switch (c) {
1447                 case 'c':
1448                         max_mount_count = strtol(optarg, &tmp, 0);
1449                         if (*tmp || max_mount_count > 16000) {
1450                                 com_err(program_name, 0,
1451                                         _("bad mounts count - %s"),
1452                                         optarg);
1453                                 usage();
1454                         }
1455                         if (max_mount_count == 0)
1456                                 max_mount_count = -1;
1457                         c_flag = 1;
1458                         open_flag = EXT2_FLAG_RW;
1459                         break;
1460                 case 'C':
1461                         mount_count = strtoul(optarg, &tmp, 0);
1462                         if (*tmp || mount_count > 16000) {
1463                                 com_err(program_name, 0,
1464                                         _("bad mounts count - %s"),
1465                                         optarg);
1466                                 usage();
1467                         }
1468                         C_flag = 1;
1469                         open_flag = EXT2_FLAG_RW;
1470                         break;
1471                 case 'e':
1472                         if (strcmp(optarg, "continue") == 0)
1473                                 errors = EXT2_ERRORS_CONTINUE;
1474                         else if (strcmp(optarg, "remount-ro") == 0)
1475                                 errors = EXT2_ERRORS_RO;
1476                         else if (strcmp(optarg, "panic") == 0)
1477                                 errors = EXT2_ERRORS_PANIC;
1478                         else {
1479                                 com_err(program_name, 0,
1480                                         _("bad error behavior - %s"),
1481                                         optarg);
1482                                 usage();
1483                         }
1484                         e_flag = 1;
1485                         open_flag = EXT2_FLAG_RW;
1486                         break;
1487                 case 'E':
1488                         extended_cmd = optarg;
1489                         open_flag |= EXT2_FLAG_RW;
1490                         break;
1491                 case 'f': /* Force */
1492                         f_flag++;
1493                         break;
1494                 case 'g':
1495                         resgid = strtoul(optarg, &tmp, 0);
1496                         if (*tmp) {
1497                                 gr = getgrnam(optarg);
1498                                 if (gr == NULL)
1499                                         tmp = optarg;
1500                                 else {
1501                                         resgid = gr->gr_gid;
1502                                         *tmp = 0;
1503                                 }
1504                         }
1505                         if (*tmp) {
1506                                 com_err(program_name, 0,
1507                                         _("bad gid/group name - %s"),
1508                                         optarg);
1509                                 usage();
1510                         }
1511                         g_flag = 1;
1512                         open_flag = EXT2_FLAG_RW;
1513                         break;
1514                 case 'i':
1515                         interval = strtoul(optarg, &tmp, 0);
1516                         switch (*tmp) {
1517                         case 's':
1518                                 tmp++;
1519                                 break;
1520                         case '\0':
1521                         case 'd':
1522                         case 'D': /* days */
1523                                 interval *= 86400;
1524                                 if (*tmp != '\0')
1525                                         tmp++;
1526                                 break;
1527                         case 'm':
1528                         case 'M': /* months! */
1529                                 interval *= 86400 * 30;
1530                                 tmp++;
1531                                 break;
1532                         case 'w':
1533                         case 'W': /* weeks */
1534                                 interval *= 86400 * 7;
1535                                 tmp++;
1536                                 break;
1537                         }
1538                         if (*tmp) {
1539                                 com_err(program_name, 0,
1540                                         _("bad interval - %s"), optarg);
1541                                 usage();
1542                         }
1543                         i_flag = 1;
1544                         open_flag = EXT2_FLAG_RW;
1545                         break;
1546                 case 'j':
1547                         if (!journal_size)
1548                                 journal_size = -1;
1549                         open_flag = EXT2_FLAG_RW;
1550                         break;
1551                 case 'J':
1552                         parse_journal_opts(optarg);
1553                         open_flag = EXT2_FLAG_RW;
1554                         break;
1555                 case 'l':
1556                         l_flag = 1;
1557                         break;
1558                 case 'L':
1559                         new_label = optarg;
1560                         L_flag = 1;
1561                         open_flag |= EXT2_FLAG_RW |
1562                                 EXT2_FLAG_JOURNAL_DEV_OK;
1563                         break;
1564                 case 'm':
1565                         reserved_ratio = strtod(optarg, &tmp);
1566                         if (*tmp || reserved_ratio > 50 ||
1567                             reserved_ratio < 0) {
1568                                 com_err(program_name, 0,
1569                                         _("bad reserved block ratio - %s"),
1570                                         optarg);
1571                                 usage();
1572                         }
1573                         m_flag = 1;
1574                         open_flag = EXT2_FLAG_RW;
1575                         break;
1576                 case 'M':
1577                         new_last_mounted = optarg;
1578                         M_flag = 1;
1579                         open_flag = EXT2_FLAG_RW;
1580                         break;
1581                 case 'o':
1582                         if (mntopts_cmd) {
1583                                 com_err(program_name, 0, "%s",
1584                                         _("-o may only be specified once"));
1585                                 usage();
1586                         }
1587                         mntopts_cmd = optarg;
1588                         open_flag = EXT2_FLAG_RW;
1589                         break;
1590                 case 'O':
1591                         if (features_cmd) {
1592                                 com_err(program_name, 0, "%s",
1593                                         _("-O may only be specified once"));
1594                                 usage();
1595                         }
1596                         features_cmd = optarg;
1597                         open_flag = EXT2_FLAG_RW;
1598                         break;
1599 #ifdef CONFIG_QUOTA
1600                 case 'Q':
1601                         Q_flag = 1;
1602                         parse_quota_opts(optarg);
1603                         open_flag = EXT2_FLAG_RW;
1604                         break;
1605 #endif
1606                 case 'r':
1607                         reserved_blocks = strtoul(optarg, &tmp, 0);
1608                         if (*tmp) {
1609                                 com_err(program_name, 0,
1610                                         _("bad reserved blocks count - %s"),
1611                                         optarg);
1612                                 usage();
1613                         }
1614                         r_flag = 1;
1615                         open_flag = EXT2_FLAG_RW;
1616                         break;
1617                 case 's': /* Deprecated */
1618                         s_flag = atoi(optarg);
1619                         open_flag = EXT2_FLAG_RW;
1620                         break;
1621                 case 'T':
1622                         T_flag = 1;
1623                         last_check_time = parse_time(optarg);
1624                         open_flag = EXT2_FLAG_RW;
1625                         break;
1626                 case 'u':
1627                                 resuid = strtoul(optarg, &tmp, 0);
1628                                 if (*tmp) {
1629                                         pw = getpwnam(optarg);
1630                                         if (pw == NULL)
1631                                                 tmp = optarg;
1632                                         else {
1633                                                 resuid = pw->pw_uid;
1634                                                 *tmp = 0;
1635                                         }
1636                                 }
1637                                 if (*tmp) {
1638                                         com_err(program_name, 0,
1639                                                 _("bad uid/user name - %s"),
1640                                                 optarg);
1641                                         usage();
1642                                 }
1643                                 u_flag = 1;
1644                                 open_flag = EXT2_FLAG_RW;
1645                                 break;
1646                 case 'U':
1647                         new_UUID = optarg;
1648                         U_flag = 1;
1649                         open_flag = EXT2_FLAG_RW |
1650                                 EXT2_FLAG_JOURNAL_DEV_OK;
1651                         break;
1652                 case 'I':
1653                         new_inode_size = strtoul(optarg, &tmp, 0);
1654                         if (*tmp) {
1655                                 com_err(program_name, 0,
1656                                         _("bad inode size - %s"),
1657                                         optarg);
1658                                 usage();
1659                         }
1660                         if (!((new_inode_size &
1661                                (new_inode_size - 1)) == 0)) {
1662                                 com_err(program_name, 0,
1663                                         _("Inode size must be a "
1664                                           "power of two- %s"),
1665                                         optarg);
1666                                 usage();
1667                         }
1668                         open_flag = EXT2_FLAG_RW;
1669                         I_flag = 1;
1670                         break;
1671                 default:
1672                         usage();
1673                 }
1674         if (optind < argc - 1 || optind == argc)
1675                 usage();
1676         if (!open_flag && !l_flag)
1677                 usage();
1678         io_options = strchr(argv[optind], '?');
1679         if (io_options)
1680                 *io_options++ = 0;
1681         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1682         if (!device_name) {
1683                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1684                         argv[optind]);
1685                 exit(1);
1686         }
1687 }
1688
1689 #ifdef CONFIG_BUILD_FINDFS
1690 void do_findfs(int argc, char **argv)
1691 {
1692         char    *dev;
1693
1694         if ((argc != 2) ||
1695             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1696                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1697                 exit(2);
1698         }
1699         dev = blkid_get_devname(NULL, argv[1], NULL);
1700         if (!dev) {
1701                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1702                         argv[1]);
1703                 exit(1);
1704         }
1705         puts(dev);
1706         exit(0);
1707 }
1708 #endif
1709
1710 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1711 {
1712         char    *buf, *token, *next, *p, *arg;
1713         int     len, hash_alg;
1714         int     r_usage = 0;
1715
1716         len = strlen(opts);
1717         buf = malloc(len+1);
1718         if (!buf) {
1719                 fprintf(stderr, "%s",
1720                         _("Couldn't allocate memory to parse options!\n"));
1721                 return 1;
1722         }
1723         strcpy(buf, opts);
1724         for (token = buf; token && *token; token = next) {
1725                 p = strchr(token, ',');
1726                 next = 0;
1727                 if (p) {
1728                         *p = 0;
1729                         next = p+1;
1730                 }
1731                 arg = strchr(token, '=');
1732                 if (arg) {
1733                         *arg = 0;
1734                         arg++;
1735                 }
1736                 if (strcmp(token, "clear-mmp") == 0 ||
1737                     strcmp(token, "clear_mmp") == 0) {
1738                         clear_mmp = 1;
1739                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1740                         unsigned long intv;
1741                         if (!arg) {
1742                                 r_usage++;
1743                                 continue;
1744                         }
1745                         intv = strtoul(arg, &p, 0);
1746                         if (*p) {
1747                                 fprintf(stderr,
1748                                         _("Invalid mmp_update_interval: %s\n"),
1749                                         arg);
1750                                 r_usage++;
1751                                 continue;
1752                         }
1753                         if (intv == 0) {
1754                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1755                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1756                                 fprintf(stderr,
1757                                         _("mmp_update_interval too big: %lu\n"),
1758                                         intv);
1759                                 r_usage++;
1760                                 continue;
1761                         }
1762                         printf(P_("Setting multiple mount protection update "
1763                                   "interval to %lu second\n",
1764                                   "Setting multiple mount protection update "
1765                                   "interval to %lu seconds\n", intv),
1766                                intv);
1767                         fs->super->s_mmp_update_interval = intv;
1768                         ext2fs_mark_super_dirty(fs);
1769                 } else if (!strcmp(token, "test_fs")) {
1770                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
1771                         printf("Setting test filesystem flag\n");
1772                         ext2fs_mark_super_dirty(fs);
1773                 } else if (!strcmp(token, "^test_fs")) {
1774                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
1775                         printf("Clearing test filesystem flag\n");
1776                         ext2fs_mark_super_dirty(fs);
1777                 } else if (strcmp(token, "stride") == 0) {
1778                         if (!arg) {
1779                                 r_usage++;
1780                                 continue;
1781                         }
1782                         stride = strtoul(arg, &p, 0);
1783                         if (*p) {
1784                                 fprintf(stderr,
1785                                         _("Invalid RAID stride: %s\n"),
1786                                         arg);
1787                                 r_usage++;
1788                                 continue;
1789                         }
1790                         stride_set = 1;
1791                 } else if (strcmp(token, "stripe-width") == 0 ||
1792                            strcmp(token, "stripe_width") == 0) {
1793                         if (!arg) {
1794                                 r_usage++;
1795                                 continue;
1796                         }
1797                         stripe_width = strtoul(arg, &p, 0);
1798                         if (*p) {
1799                                 fprintf(stderr,
1800                                         _("Invalid RAID stripe-width: %s\n"),
1801                                         arg);
1802                                 r_usage++;
1803                                 continue;
1804                         }
1805                         stripe_width_set = 1;
1806                 } else if (strcmp(token, "hash_alg") == 0 ||
1807                            strcmp(token, "hash-alg") == 0) {
1808                         if (!arg) {
1809                                 r_usage++;
1810                                 continue;
1811                         }
1812                         hash_alg = e2p_string2hash(arg);
1813                         if (hash_alg < 0) {
1814                                 fprintf(stderr,
1815                                         _("Invalid hash algorithm: %s\n"),
1816                                         arg);
1817                                 r_usage++;
1818                                 continue;
1819                         }
1820                         fs->super->s_def_hash_version = hash_alg;
1821                         printf(_("Setting default hash algorithm "
1822                                  "to %s (%d)\n"),
1823                                arg, hash_alg);
1824                         ext2fs_mark_super_dirty(fs);
1825                 } else if (!strcmp(token, "mount_opts")) {
1826                         if (!arg) {
1827                                 r_usage++;
1828                                 continue;
1829                         }
1830                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
1831                                 fprintf(stderr,
1832                                         "Extended mount options too long\n");
1833                                 continue;
1834                         }
1835                         ext_mount_opts = strdup(arg);
1836                 } else
1837                         r_usage++;
1838         }
1839         if (r_usage) {
1840                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
1841                         "Extended options are separated by commas, "
1842                         "and may take an argument which\n"
1843                         "\tis set off by an equals ('=') sign.\n\n"
1844                         "Valid extended options are:\n"
1845                         "\tclear_mmp\n"
1846                         "\thash_alg=<hash algorithm>\n"
1847                         "\tmount_opts=<extended default mount options>\n"
1848                         "\tstride=<RAID per-disk chunk size in blocks>\n"
1849                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
1850                         "\ttest_fs\n"
1851                         "\t^test_fs\n"));
1852                 free(buf);
1853                 return 1;
1854         }
1855         free(buf);
1856
1857         return 0;
1858 }
1859
1860 /*
1861  * Fill in the block bitmap bmap with the information regarding the
1862  * blocks to be moved
1863  */
1864 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
1865                             ext2fs_block_bitmap bmap)
1866 {
1867         dgrp_t i;
1868         int retval;
1869         ext2_badblocks_list bb_list = 0;
1870         blk64_t j, needed_blocks = 0;
1871         blk64_t start_blk, end_blk;
1872
1873         retval = ext2fs_read_bb_inode(fs, &bb_list);
1874         if (retval)
1875                 return retval;
1876
1877         for (i = 0; i < fs->group_desc_count; i++) {
1878                 start_blk = ext2fs_inode_table_loc(fs, i) +
1879                                         fs->inode_blocks_per_group;
1880
1881                 end_blk = ext2fs_inode_table_loc(fs, i) +
1882                                         new_ino_blks_per_grp;
1883
1884                 for (j = start_blk; j < end_blk; j++) {
1885                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
1886                                 /*
1887                                  * IF the block is a bad block we fail
1888                                  */
1889                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
1890                                         ext2fs_badblocks_list_free(bb_list);
1891                                         return ENOSPC;
1892                                 }
1893
1894                                 ext2fs_mark_block_bitmap2(bmap, j);
1895                         } else {
1896                                 /*
1897                                  * We are going to use this block for
1898                                  * inode table. So mark them used.
1899                                  */
1900                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
1901                         }
1902                 }
1903                 needed_blocks += end_blk - start_blk;
1904         }
1905
1906         ext2fs_badblocks_list_free(bb_list);
1907         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
1908                 return ENOSPC;
1909
1910         return 0;
1911 }
1912
1913 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
1914 {
1915         dgrp_t group;
1916         group = ext2fs_group_of_blk2(fs, blk);
1917         if (ext2fs_block_bitmap_loc(fs, group) == blk)
1918                 return 1;
1919         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
1920                 return 1;
1921         return 0;
1922 }
1923
1924 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
1925 {
1926         blk64_t start_blk, end_blk;
1927         start_blk = fs->super->s_first_data_block +
1928                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
1929         /*
1930          * We cannot get new block beyond end_blk for for the last block group
1931          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
1932          */
1933         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
1934         if (blk >= start_blk && blk <= end_blk)
1935                 return 1;
1936         return 0;
1937 }
1938
1939 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
1940 {
1941
1942         char *buf;
1943         dgrp_t group = 0;
1944         errcode_t retval;
1945         int meta_data = 0;
1946         blk64_t blk, new_blk, goal;
1947         struct blk_move *bmv;
1948
1949         retval = ext2fs_get_mem(fs->blocksize, &buf);
1950         if (retval)
1951                 return retval;
1952
1953         for (new_blk = blk = fs->super->s_first_data_block;
1954              blk < ext2fs_blocks_count(fs->super); blk++) {
1955                 if (!ext2fs_test_block_bitmap2(bmap, blk))
1956                         continue;
1957
1958                 if (ext2fs_is_meta_block(fs, blk)) {
1959                         /*
1960                          * If the block is mapping a fs meta data block
1961                          * like group desc/block bitmap/inode bitmap. We
1962                          * should find a block in the same group and fix
1963                          * the respective fs metadata pointers. Otherwise
1964                          * fail
1965                          */
1966                         group = ext2fs_group_of_blk2(fs, blk);
1967                         goal = ext2fs_group_first_block2(fs, group);
1968                         meta_data = 1;
1969
1970                 } else {
1971                         goal = new_blk;
1972                 }
1973                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
1974                 if (retval)
1975                         goto err_out;
1976
1977                 /* new fs meta data block should be in the same group */
1978                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
1979                         retval = ENOSPC;
1980                         goto err_out;
1981                 }
1982
1983                 /* Mark this block as allocated */
1984                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
1985
1986                 /* Add it to block move list */
1987                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
1988                 if (retval)
1989                         goto err_out;
1990
1991                 bmv->old_loc = blk;
1992                 bmv->new_loc = new_blk;
1993
1994                 list_add(&(bmv->list), &blk_move_list);
1995
1996                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
1997                 if (retval)
1998                         goto err_out;
1999
2000                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2001                 if (retval)
2002                         goto err_out;
2003         }
2004
2005 err_out:
2006         ext2fs_free_mem(&buf);
2007         return retval;
2008 }
2009
2010 static blk64_t translate_block(blk64_t blk)
2011 {
2012         struct list_head *entry;
2013         struct blk_move *bmv;
2014
2015         list_for_each(entry, &blk_move_list) {
2016                 bmv = list_entry(entry, struct blk_move, list);
2017                 if (bmv->old_loc == blk)
2018                         return bmv->new_loc;
2019         }
2020
2021         return 0;
2022 }
2023
2024 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2025                          blk64_t *block_nr,
2026                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2027                          blk64_t ref_block EXT2FS_ATTR((unused)),
2028                          int ref_offset EXT2FS_ATTR((unused)),
2029                          void *priv_data)
2030 {
2031         int ret = 0;
2032         blk64_t new_blk;
2033         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2034
2035         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2036                 return 0;
2037         new_blk = translate_block(*block_nr);
2038         if (new_blk) {
2039                 *block_nr = new_blk;
2040                 /*
2041                  * This will force the ext2fs_write_inode in the iterator
2042                  */
2043                 ret |= BLOCK_CHANGED;
2044         }
2045
2046         return ret;
2047 }
2048
2049 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2050 {
2051         errcode_t retval = 0;
2052         ext2_ino_t ino;
2053         blk64_t blk;
2054         char *block_buf = 0;
2055         struct ext2_inode inode;
2056         ext2_inode_scan scan = NULL;
2057
2058         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2059         if (retval)
2060                 return retval;
2061
2062         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2063         if (retval)
2064                 goto err_out;
2065
2066         while (1) {
2067                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2068                 if (retval)
2069                         goto err_out;
2070
2071                 if (!ino)
2072                         break;
2073
2074                 if (inode.i_links_count == 0)
2075                         continue; /* inode not in use */
2076
2077                 /* FIXME!!
2078                  * If we end up modifying the journal inode
2079                  * the sb->s_jnl_blocks will differ. But a
2080                  * subsequent e2fsck fixes that.
2081                  * Do we need to fix this ??
2082                  */
2083
2084                 if (ext2fs_file_acl_block(fs, &inode) &&
2085                     ext2fs_test_block_bitmap2(bmap,
2086                                         ext2fs_file_acl_block(fs, &inode))) {
2087                         blk = translate_block(ext2fs_file_acl_block(fs,
2088                                                                     &inode));
2089                         if (!blk)
2090                                 continue;
2091
2092                         ext2fs_file_acl_block_set(fs, &inode, blk);
2093
2094                         /*
2095                          * Write the inode to disk so that inode table
2096                          * resizing can work
2097                          */
2098                         retval = ext2fs_write_inode(fs, ino, &inode);
2099                         if (retval)
2100                                 goto err_out;
2101                 }
2102
2103                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2104                         continue;
2105
2106                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2107                                                process_block, bmap);
2108                 if (retval)
2109                         goto err_out;
2110
2111         }
2112
2113 err_out:
2114         ext2fs_free_mem(&block_buf);
2115
2116         return retval;
2117 }
2118
2119 /*
2120  * We need to scan for inode and block bitmaps that may need to be
2121  * moved.  This can take place if the filesystem was formatted for
2122  * RAID arrays using the mke2fs's extended option "stride".
2123  */
2124 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2125 {
2126         dgrp_t i;
2127         blk64_t blk, new_blk;
2128
2129         for (i = 0; i < fs->group_desc_count; i++) {
2130                 blk = ext2fs_block_bitmap_loc(fs, i);
2131                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2132                         new_blk = translate_block(blk);
2133                         if (!new_blk)
2134                                 continue;
2135                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2136                 }
2137
2138                 blk = ext2fs_inode_bitmap_loc(fs, i);
2139                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2140                         new_blk = translate_block(blk);
2141                         if (!new_blk)
2142                                 continue;
2143                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2144                 }
2145         }
2146         return 0;
2147 }
2148
2149 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2150 {
2151         dgrp_t i;
2152         blk64_t blk;
2153         errcode_t retval;
2154         int new_ino_blks_per_grp;
2155         unsigned int j;
2156         char *old_itable = NULL, *new_itable = NULL;
2157         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2158         unsigned long old_ino_size;
2159         int old_itable_size, new_itable_size;
2160
2161         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2162         old_ino_size = EXT2_INODE_SIZE(fs->super);
2163
2164         new_ino_blks_per_grp = ext2fs_div_ceil(
2165                                         EXT2_INODES_PER_GROUP(fs->super) *
2166                                         new_ino_size,
2167                                         fs->blocksize);
2168
2169         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2170
2171         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2172         if (retval)
2173                 return retval;
2174
2175         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2176         if (retval)
2177                 goto err_out;
2178
2179         tmp_old_itable = old_itable;
2180         tmp_new_itable = new_itable;
2181
2182         for (i = 0; i < fs->group_desc_count; i++) {
2183                 blk = ext2fs_inode_table_loc(fs, i);
2184                 retval = io_channel_read_blk64(fs->io, blk,
2185                                 fs->inode_blocks_per_group, old_itable);
2186                 if (retval)
2187                         goto err_out;
2188
2189                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2190                         memcpy(new_itable, old_itable, old_ino_size);
2191
2192                         memset(new_itable+old_ino_size, 0,
2193                                         new_ino_size - old_ino_size);
2194
2195                         new_itable += new_ino_size;
2196                         old_itable += old_ino_size;
2197                 }
2198
2199                 /* reset the pointer */
2200                 old_itable = tmp_old_itable;
2201                 new_itable = tmp_new_itable;
2202
2203                 retval = io_channel_write_blk64(fs->io, blk,
2204                                         new_ino_blks_per_grp, new_itable);
2205                 if (retval)
2206                         goto err_out;
2207         }
2208
2209         /* Update the meta data */
2210         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2211         fs->super->s_inode_size = new_ino_size;
2212
2213 err_out:
2214         if (old_itable)
2215                 ext2fs_free_mem(&old_itable);
2216
2217         if (new_itable)
2218                 ext2fs_free_mem(&new_itable);
2219
2220         return retval;
2221 }
2222
2223 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2224 {
2225         blk64_t         blk;
2226         ext2_ino_t      ino;
2227         unsigned int    group = 0;
2228         unsigned int    count = 0;
2229         int             total_free = 0;
2230         int             group_free = 0;
2231
2232         /*
2233          * First calculate the block statistics
2234          */
2235         for (blk = fs->super->s_first_data_block;
2236              blk < ext2fs_blocks_count(fs->super); blk++) {
2237                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2238                         group_free++;
2239                         total_free++;
2240                 }
2241                 count++;
2242                 if ((count == fs->super->s_blocks_per_group) ||
2243                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2244                         ext2fs_bg_free_blocks_count_set(fs, group++,
2245                                                         group_free);
2246                         count = 0;
2247                         group_free = 0;
2248                 }
2249         }
2250         total_free = EXT2FS_C2B(fs, total_free);
2251         ext2fs_free_blocks_count_set(fs->super, total_free);
2252
2253         /*
2254          * Next, calculate the inode statistics
2255          */
2256         group_free = 0;
2257         total_free = 0;
2258         count = 0;
2259         group = 0;
2260
2261         /* Protect loop from wrap-around if s_inodes_count maxed */
2262         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2263                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2264                         group_free++;
2265                         total_free++;
2266                 }
2267                 count++;
2268                 if ((count == fs->super->s_inodes_per_group) ||
2269                     (ino == fs->super->s_inodes_count)) {
2270                         ext2fs_bg_free_inodes_count_set(fs, group++,
2271                                                         group_free);
2272                         count = 0;
2273                         group_free = 0;
2274                 }
2275         }
2276         fs->super->s_free_inodes_count = total_free;
2277         ext2fs_mark_super_dirty(fs);
2278         return 0;
2279 }
2280
2281 #define list_for_each_safe(pos, pnext, head) \
2282         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2283              pos = pnext, pnext = pos->next)
2284
2285 static void free_blk_move_list(void)
2286 {
2287         struct list_head *entry, *tmp;
2288         struct blk_move *bmv;
2289
2290         list_for_each_safe(entry, tmp, &blk_move_list) {
2291                 bmv = list_entry(entry, struct blk_move, list);
2292                 list_del(entry);
2293                 ext2fs_free_mem(&bmv);
2294         }
2295         return;
2296 }
2297
2298 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2299 {
2300         errcode_t retval;
2301         int new_ino_blks_per_grp;
2302         ext2fs_block_bitmap bmap;
2303
2304         retval = ext2fs_read_inode_bitmap(fs);
2305         if (retval) {
2306                 fputs(_("Failed to read inode bitmap\n"), stderr);
2307                 return retval;
2308         }
2309         retval = ext2fs_read_block_bitmap(fs);
2310         if (retval) {
2311                 fputs(_("Failed to read block bitmap\n"), stderr);
2312                 return retval;
2313         }
2314         INIT_LIST_HEAD(&blk_move_list);
2315
2316
2317         new_ino_blks_per_grp = ext2fs_div_ceil(
2318                                         EXT2_INODES_PER_GROUP(fs->super)*
2319                                         new_size,
2320                                         fs->blocksize);
2321
2322         /* We may change the file system.
2323          * Mark the file system as invalid so that
2324          * the user is prompted to run fsck.
2325          */
2326         fs->super->s_state &= ~EXT2_VALID_FS;
2327
2328         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2329                                                 &bmap);
2330         if (retval) {
2331                 fputs(_("Failed to allocate block bitmap when "
2332                                 "increasing inode size\n"), stderr);
2333                 return retval;
2334         }
2335         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2336         if (retval) {
2337                 fputs(_("Not enough space to increase inode size \n"), stderr);
2338                 goto err_out;
2339         }
2340         retval = move_block(fs, bmap);
2341         if (retval) {
2342                 fputs(_("Failed to relocate blocks during inode resize \n"),
2343                       stderr);
2344                 goto err_out;
2345         }
2346         retval = inode_scan_and_fix(fs, bmap);
2347         if (retval)
2348                 goto err_out_undo;
2349
2350         retval = group_desc_scan_and_fix(fs, bmap);
2351         if (retval)
2352                 goto err_out_undo;
2353
2354         retval = expand_inode_table(fs, new_size);
2355         if (retval)
2356                 goto err_out_undo;
2357
2358         ext2fs_calculate_summary_stats(fs);
2359
2360         fs->super->s_state |= EXT2_VALID_FS;
2361         /* mark super block and block bitmap as dirty */
2362         ext2fs_mark_super_dirty(fs);
2363         ext2fs_mark_bb_dirty(fs);
2364
2365 err_out:
2366         free_blk_move_list();
2367         ext2fs_free_block_bitmap(bmap);
2368
2369         return retval;
2370
2371 err_out_undo:
2372         free_blk_move_list();
2373         ext2fs_free_block_bitmap(bmap);
2374         fputs(_("Error in resizing the inode size.\n"
2375                         "Run e2undo to undo the "
2376                         "file system changes. \n"), stderr);
2377
2378         return retval;
2379 }
2380
2381 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2382 {
2383         errcode_t retval = 0;
2384         const char *tdb_dir;
2385         char *tdb_file;
2386         char *dev_name, *tmp_name;
2387
2388 #if 0 /* FIXME!! */
2389         /*
2390          * Configuration via a conf file would be
2391          * nice
2392          */
2393         profile_get_string(profile, "scratch_files",
2394                                         "directory", 0, 0,
2395                                         &tdb_dir);
2396 #endif
2397         tmp_name = strdup(name);
2398         if (!tmp_name) {
2399         alloc_fn_fail:
2400                 com_err(program_name, ENOMEM, "%s",
2401                         _("Couldn't allocate memory for tdb filename\n"));
2402                 return ENOMEM;
2403         }
2404         dev_name = basename(tmp_name);
2405
2406         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2407         if (!tdb_dir)
2408                 tdb_dir = "/var/lib/e2fsprogs";
2409
2410         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2411             access(tdb_dir, W_OK))
2412                 return 0;
2413
2414         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2415         if (!tdb_file)
2416                 goto alloc_fn_fail;
2417         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2418
2419         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2420                 retval = errno;
2421                 com_err(program_name, retval,
2422                         _("while trying to delete %s"), tdb_file);
2423                 free(tdb_file);
2424                 return retval;
2425         }
2426
2427         set_undo_io_backing_manager(*io_ptr);
2428         *io_ptr = undo_io_manager;
2429         set_undo_io_backup_file(tdb_file);
2430         printf(_("To undo the tune2fs operation please run "
2431                  "the command\n    e2undo %s %s\n\n"),
2432                  tdb_file, name);
2433         free(tdb_file);
2434         free(tmp_name);
2435         return retval;
2436 }
2437
2438 int
2439 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2440 {
2441         int retval, nr_users, start;
2442         journal_superblock_t *jsb;
2443         ext2_filsys jfs;
2444         __u8 *j_uuid;
2445         char *journal_path;
2446         char uuid[UUID_STR_SIZE];
2447         char buf[SUPERBLOCK_SIZE];
2448
2449         if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) ||
2450                 uuid_is_null(sb->s_journal_uuid))
2451                 return 0;
2452
2453         uuid_unparse(sb->s_journal_uuid, uuid);
2454         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2455         if (!journal_path)
2456                 return 0;
2457
2458         retval = ext2fs_open2(journal_path, io_options,
2459                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2460                               0, 0, unix_io_manager, &jfs);
2461         if (retval) {
2462                 com_err(program_name, retval,
2463                         _("while trying to open %s"),
2464                         journal_path);
2465                 return retval;
2466         }
2467
2468         retval = get_journal_sb(jfs, buf);
2469         if (retval != 0) {
2470                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2471                         fprintf(stderr, _("%s is not a journal device.\n"),
2472                                 journal_path);
2473                 return retval;
2474         }
2475
2476         jsb = (journal_superblock_t *) buf;
2477         /* Find the filesystem UUID */
2478         nr_users = ntohl(jsb->s_nr_users);
2479
2480         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2481         if (j_uuid == NULL) {
2482                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2483                       stderr);
2484                 return EXT2_ET_LOAD_EXT_JOURNAL;
2485         }
2486
2487         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2488
2489         start = ext2fs_journal_sb_start(jfs->blocksize);
2490         /* Write back the journal superblock */
2491         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2492         if (retval != 0) {
2493                 com_err(program_name, retval,
2494                         "while writing journal superblock.");
2495                 return retval;
2496         }
2497
2498         ext2fs_close(jfs);
2499
2500         return 0;
2501 }
2502
2503 int main(int argc, char **argv)
2504 {
2505         errcode_t retval;
2506         ext2_filsys fs;
2507         struct ext2_super_block *sb;
2508         io_manager io_ptr, io_ptr_orig = NULL;
2509         int rc = 0;
2510
2511 #ifdef ENABLE_NLS
2512         setlocale(LC_MESSAGES, "");
2513         setlocale(LC_CTYPE, "");
2514         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2515         textdomain(NLS_CAT_NAME);
2516         set_com_err_gettext(gettext);
2517 #endif
2518         if (argc && *argv)
2519                 program_name = *argv;
2520         add_error_table(&et_ext2_error_table);
2521
2522 #ifdef CONFIG_BUILD_FINDFS
2523         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2524                 do_findfs(argc, argv);
2525 #endif
2526         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2527                 parse_e2label_options(argc, argv);
2528         else
2529                 parse_tune2fs_options(argc, argv);
2530
2531 #ifdef CONFIG_TESTIO_DEBUG
2532         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2533                 io_ptr = test_io_manager;
2534                 test_io_backing_manager = unix_io_manager;
2535         } else
2536 #endif
2537                 io_ptr = unix_io_manager;
2538
2539 retry_open:
2540         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2541                 open_flag |= EXT2_FLAG_SKIP_MMP;
2542
2543         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2544
2545         /* keep the filesystem struct around to dump MMP data */
2546         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2547
2548         retval = ext2fs_open2(device_name, io_options, open_flag,
2549                               0, 0, io_ptr, &fs);
2550         if (retval) {
2551                 com_err(program_name, retval,
2552                         _("while trying to open %s"),
2553                         device_name);
2554                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2555                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2556                         dump_mmp_msg(fs->mmp_buf,
2557                                      _("If you are sure the filesystem "
2558                                        "is not in use on any node, run:\n"
2559                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2560                 else if (retval == EXT2_ET_MMP_FAILED)
2561                         dump_mmp_msg(fs->mmp_buf, NULL);
2562                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2563                         fprintf(stderr,
2564                                 _("MMP block magic is bad. Try to fix it by "
2565                                   "running:\n'e2fsck -f %s'\n"), device_name);
2566                 else if (retval != EXT2_ET_MMP_FAILED)
2567                         fprintf(stderr, "%s",
2568                              _("Couldn't find valid filesystem superblock.\n"));
2569
2570                 ext2fs_free(fs);
2571                 exit(1);
2572         }
2573         if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
2574                                       EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2575                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2576                 ext2fs_free(fs);
2577                 exit(1);
2578         }
2579         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2580
2581         if (I_flag && !io_ptr_orig) {
2582                 /*
2583                  * Check the inode size is right so we can issue an
2584                  * error message and bail before setting up the tdb
2585                  * file.
2586                  */
2587                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2588                         fprintf(stderr, _("The inode size is already %lu\n"),
2589                                 new_inode_size);
2590                         rc = 1;
2591                         goto closefs;
2592                 }
2593                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2594                         fprintf(stderr, "%s",
2595                                 _("Shrinking inode size is not supported\n"));
2596                         rc = 1;
2597                         goto closefs;
2598                 }
2599                 if (new_inode_size > fs->blocksize) {
2600                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2601                                 new_inode_size, fs->blocksize);
2602                         rc = 1;
2603                         goto closefs;
2604                 }
2605
2606                 /*
2607                  * If inode resize is requested use the
2608                  * Undo I/O manager
2609                  */
2610                 io_ptr_orig = io_ptr;
2611                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2612                 if (retval) {
2613                         rc = 1;
2614                         goto closefs;
2615                 }
2616                 if (io_ptr != io_ptr_orig) {
2617                         ext2fs_close_free(&fs);
2618                         goto retry_open;
2619                 }
2620         }
2621
2622         sb = fs->super;
2623         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2624
2625         if (print_label) {
2626                 /* For e2label emulation */
2627                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2628                        sb->s_volume_name);
2629                 remove_error_table(&et_ext2_error_table);
2630                 goto closefs;
2631         }
2632
2633         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2634         if (retval) {
2635                 com_err("ext2fs_check_if_mount", retval,
2636                         _("while determining whether %s is mounted."),
2637                         device_name);
2638                 rc = 1;
2639                 goto closefs;
2640         }
2641         /* Normally we only need to write out the superblock */
2642         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2643
2644         if (c_flag) {
2645                 sb->s_max_mnt_count = max_mount_count;
2646                 ext2fs_mark_super_dirty(fs);
2647                 printf(_("Setting maximal mount count to %d\n"),
2648                        max_mount_count);
2649         }
2650         if (C_flag) {
2651                 sb->s_mnt_count = mount_count;
2652                 ext2fs_mark_super_dirty(fs);
2653                 printf(_("Setting current mount count to %d\n"), mount_count);
2654         }
2655         if (e_flag) {
2656                 sb->s_errors = errors;
2657                 ext2fs_mark_super_dirty(fs);
2658                 printf(_("Setting error behavior to %d\n"), errors);
2659         }
2660         if (g_flag) {
2661                 sb->s_def_resgid = resgid;
2662                 ext2fs_mark_super_dirty(fs);
2663                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2664         }
2665         if (i_flag) {
2666                 if ((unsigned long long)interval >= (1ULL << 32)) {
2667                         com_err(program_name, 0,
2668                                 _("interval between checks is too big (%lu)"),
2669                                 interval);
2670                         rc = 1;
2671                         goto closefs;
2672                 }
2673                 sb->s_checkinterval = interval;
2674                 ext2fs_mark_super_dirty(fs);
2675                 printf(_("Setting interval between checks to %lu seconds\n"),
2676                        interval);
2677         }
2678         if (m_flag) {
2679                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2680                                           ext2fs_blocks_count(sb) / 100.0);
2681                 ext2fs_mark_super_dirty(fs);
2682                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2683                         reserved_ratio, ext2fs_r_blocks_count(sb));
2684         }
2685         if (r_flag) {
2686                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2687                         com_err(program_name, 0,
2688                                 _("reserved blocks count is too big (%llu)"),
2689                                 reserved_blocks);
2690                         rc = 1;
2691                         goto closefs;
2692                 }
2693                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2694                 ext2fs_mark_super_dirty(fs);
2695                 printf(_("Setting reserved blocks count to %llu\n"),
2696                        reserved_blocks);
2697         }
2698         if (s_flag == 1) {
2699                 if (sb->s_feature_ro_compat &
2700                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
2701                         fputs(_("\nThe filesystem already has sparse "
2702                                 "superblocks.\n"), stderr);
2703                 } else if (sb->s_feature_incompat &
2704                         EXT2_FEATURE_INCOMPAT_META_BG) {
2705                         fputs(_("\nSetting the sparse superblock flag not "
2706                                 "supported\nfor filesystems with "
2707                                 "the meta_bg feature enabled.\n"),
2708                                 stderr);
2709                         rc = 1;
2710                         goto closefs;
2711                 } else {
2712                         sb->s_feature_ro_compat |=
2713                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
2714                         sb->s_state &= ~EXT2_VALID_FS;
2715                         ext2fs_mark_super_dirty(fs);
2716                         printf(_("\nSparse superblock flag set.  %s"),
2717                                _(please_fsck));
2718                 }
2719         }
2720         if (s_flag == 0) {
2721                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2722                       stderr);
2723                 rc = 1;
2724                 goto closefs;
2725         }
2726         if (T_flag) {
2727                 sb->s_lastcheck = last_check_time;
2728                 ext2fs_mark_super_dirty(fs);
2729                 printf(_("Setting time filesystem last checked to %s\n"),
2730                        ctime(&last_check_time));
2731         }
2732         if (u_flag) {
2733                 sb->s_def_resuid = resuid;
2734                 ext2fs_mark_super_dirty(fs);
2735                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
2736         }
2737         if (L_flag) {
2738                 if (strlen(new_label) > sizeof(sb->s_volume_name))
2739                         fputs(_("Warning: label too long, truncating.\n"),
2740                               stderr);
2741                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
2742                 strncpy(sb->s_volume_name, new_label,
2743                         sizeof(sb->s_volume_name));
2744                 ext2fs_mark_super_dirty(fs);
2745         }
2746         if (M_flag) {
2747                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
2748                 strncpy(sb->s_last_mounted, new_last_mounted,
2749                         sizeof(sb->s_last_mounted));
2750                 ext2fs_mark_super_dirty(fs);
2751         }
2752         if (mntopts_cmd) {
2753                 rc = update_mntopts(fs, mntopts_cmd);
2754                 if (rc)
2755                         goto closefs;
2756         }
2757         if (features_cmd) {
2758                 rc = update_feature_set(fs, features_cmd);
2759                 if (rc)
2760                         goto closefs;
2761         }
2762         if (extended_cmd) {
2763                 rc = parse_extended_opts(fs, extended_cmd);
2764                 if (rc)
2765                         goto closefs;
2766                 if (clear_mmp && !f_flag) {
2767                         fputs(_("Error in using clear_mmp. "
2768                                 "It must be used with -f\n"),
2769                               stderr);
2770                         goto closefs;
2771                 }
2772         }
2773         if (clear_mmp) {
2774                 rc = ext2fs_mmp_clear(fs);
2775                 goto closefs;
2776         }
2777         if (journal_size || journal_device) {
2778                 rc = add_journal(fs);
2779                 if (rc)
2780                         goto closefs;
2781         }
2782
2783         if (Q_flag) {
2784                 if (mount_flags & EXT2_MF_MOUNTED) {
2785                         fputs(_("The quota feature may only be changed when "
2786                                 "the filesystem is unmounted.\n"), stderr);
2787                         rc = 1;
2788                         goto closefs;
2789                 }
2790                 handle_quota_options(fs);
2791         }
2792
2793         if (U_flag) {
2794                 int set_csum = 0;
2795                 dgrp_t i;
2796                 char buf[SUPERBLOCK_SIZE];
2797                 __u8 old_uuid[UUID_SIZE];
2798
2799                 if (ext2fs_has_group_desc_csum(fs)) {
2800                         /*
2801                          * Changing the UUID requires rewriting all metadata,
2802                          * which can race with a mounted fs.  Don't allow that.
2803                          */
2804                         if (mount_flags & EXT2_MF_MOUNTED) {
2805                                 fputs(_("The UUID may only be "
2806                                         "changed when the filesystem is "
2807                                         "unmounted.\n"), stderr);
2808                                 exit(1);
2809                         }
2810                         if (check_fsck_needed(fs))
2811                                 exit(1);
2812
2813                         /*
2814                          * Determine if the block group checksums are
2815                          * correct so we know whether or not to set
2816                          * them later on.
2817                          */
2818                         for (i = 0; i < fs->group_desc_count; i++)
2819                                 if (!ext2fs_group_desc_csum_verify(fs, i))
2820                                         break;
2821                         if (i >= fs->group_desc_count)
2822                                 set_csum = 1;
2823                 }
2824
2825                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
2826                 if ((strcasecmp(new_UUID, "null") == 0) ||
2827                     (strcasecmp(new_UUID, "clear") == 0)) {
2828                         uuid_clear(sb->s_uuid);
2829                 } else if (strcasecmp(new_UUID, "time") == 0) {
2830                         uuid_generate_time(sb->s_uuid);
2831                 } else if (strcasecmp(new_UUID, "random") == 0) {
2832                         uuid_generate(sb->s_uuid);
2833                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
2834                         com_err(program_name, 0, "%s",
2835                                 _("Invalid UUID format\n"));
2836                         rc = 1;
2837                         goto closefs;
2838                 }
2839                 ext2fs_init_csum_seed(fs);
2840                 if (set_csum) {
2841                         for (i = 0; i < fs->group_desc_count; i++)
2842                                 ext2fs_group_desc_csum_set(fs, i);
2843                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2844                 }
2845
2846                 /* If this is a journal dev, we need to copy UUID into jsb */
2847                 if (!(rc = get_journal_sb(fs, buf))) {
2848                         journal_superblock_t *jsb;
2849
2850                         jsb = (journal_superblock_t *) buf;
2851                         fputs(_("Need to update journal superblock.\n"), stdout);
2852                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
2853
2854                         /* Writeback the journal superblock */
2855                         if ((rc = io_channel_write_blk64(fs->io,
2856                                 ext2fs_journal_sb_start(fs->blocksize),
2857                                         -SUPERBLOCK_SIZE, buf)))
2858                                 goto closefs;
2859                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
2860                         goto closefs;
2861                 else {
2862                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
2863
2864                         if ((rc = fs_update_journal_user(sb, old_uuid)))
2865                                 goto closefs;
2866                 }
2867
2868                 ext2fs_mark_super_dirty(fs);
2869                 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
2870                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
2871                         rewrite_checksums = 1;
2872         }
2873         if (rewrite_checksums)
2874                 rewrite_metadata_checksums(fs);
2875         if (I_flag) {
2876                 if (mount_flags & EXT2_MF_MOUNTED) {
2877                         fputs(_("The inode size may only be "
2878                                 "changed when the filesystem is "
2879                                 "unmounted.\n"), stderr);
2880                         rc = 1;
2881                         goto closefs;
2882                 }
2883                 if (fs->super->s_feature_incompat &
2884                     EXT4_FEATURE_INCOMPAT_FLEX_BG) {
2885                         fputs(_("Changing the inode size not supported for "
2886                                 "filesystems with the flex_bg\n"
2887                                 "feature enabled.\n"),
2888                               stderr);
2889                         rc = 1;
2890                         goto closefs;
2891                 }
2892                 /*
2893                  * We want to update group descriptor also
2894                  * with the new free inode count
2895                  */
2896                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2897                 if (resize_inode(fs, new_inode_size) == 0) {
2898                         printf(_("Setting inode size %lu\n"),
2899                                                         new_inode_size);
2900                 } else {
2901                         printf("%s", _("Failed to change inode size\n"));
2902                         rc = 1;
2903                         goto closefs;
2904                 }
2905         }
2906
2907         if (l_flag)
2908                 list_super(sb);
2909         if (stride_set) {
2910                 sb->s_raid_stride = stride;
2911                 ext2fs_mark_super_dirty(fs);
2912                 printf(_("Setting stride size to %d\n"), stride);
2913         }
2914         if (stripe_width_set) {
2915                 sb->s_raid_stripe_width = stripe_width;
2916                 ext2fs_mark_super_dirty(fs);
2917                 printf(_("Setting stripe width to %d\n"), stripe_width);
2918         }
2919         if (ext_mount_opts) {
2920                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
2921                         sizeof(fs->super->s_mount_opts));
2922                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
2923                 ext2fs_mark_super_dirty(fs);
2924                 printf(_("Setting extended default mount options to '%s'\n"),
2925                        ext_mount_opts);
2926                 free(ext_mount_opts);
2927         }
2928         free(device_name);
2929         remove_error_table(&et_ext2_error_table);
2930
2931 closefs:
2932         if (rc) {
2933                 ext2fs_mmp_stop(fs);
2934                 exit(1);
2935         }
2936
2937         return (ext2fs_close_free(&fs) ? 1 : 0);
2938 }