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 "plausible.h"
  63 #include "blkid/blkid.h"
  64 #include "quota/quotaio.h"
  65
  66 #include "../version.h"
  67 #include "nls-enable.h"
  68
  69 #define QOPT_ENABLE     (1)
  70 #define QOPT_DISABLE    (-1)
  71
  72 extern int ask_yn(const char *string, int def);
  73
  74 const char *program_name = "tune2fs";
  75 char *device_name;
  76 char *new_label, *new_last_mounted, *new_UUID;
  77 char *io_options;
  78 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  79 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  80 static int I_flag;
  81 static int clear_mmp;
  82 static time_t last_check_time;
  83 static int print_label;
  84 static int max_mount_count, mount_count, mount_flags;
  85 static unsigned long interval;
  86 static blk64_t reserved_blocks;
  87 static double reserved_ratio;
  88 static unsigned long resgid, resuid;
  89 static unsigned short errors;
  90 static int open_flag;
  91 static char *features_cmd;
  92 static char *mntopts_cmd;
  93 static int stride, stripe_width;
  94 static int stride_set, stripe_width_set;
  95 static char *extended_cmd;
  96 static unsigned long new_inode_size;
  97 static char *ext_mount_opts;
  98 static int usrquota, grpquota;
  99 static int rewrite_checksums;
 100
 101 int journal_size, journal_flags;
 102 char *journal_device;
 103 static blk64_t journal_location = ~0LL;
 104
 105 static struct list_head blk_move_list;
 106
 107 struct blk_move {
 108         struct list_head list;
 109         blk64_t old_loc;
 110         blk64_t new_loc;
 111 };
 112
 113
 114 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
 115 static const char *please_dir_fsck =
 116                 N_("Please run e2fsck -D on the filesystem.\n");
 117
 118 #ifdef CONFIG_BUILD_FINDFS
 119 void do_findfs(int argc, char **argv);
 120 #endif
 121
 122 static void usage(void)
 123 {
 124         fprintf(stderr,
 125                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
 126                   "[-g group]\n"
 127                   "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
 128                   "\t[-m reserved_blocks_percent] "
 129                   "[-o [^]mount_options[,...]] [-p mmp_update_interval]\n"
 130                   "\t[-r reserved_blocks_count] [-u user] [-C mount_count] "
 131                   "[-L volume_label]\n"
 132                   "\t[-M last_mounted_dir] [-O [^]feature[,...]]\n"
 133 #ifdef CONFIG_QUOTA
 134                   "\t[-Q quota_options]\n"
 135 #endif
 136                   "\t[-E extended-option[,...]] [-T last_check_time] "
 137                   "[-U UUID]\n\t[ -I new_inode_size ] device\n"), program_name);
 138         exit(1);
 139 }
 140
 141 static __u32 ok_features[3] = {
 142         /* Compat */
 143         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 144                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 145         /* Incompat */
 146         EXT2_FEATURE_INCOMPAT_FILETYPE |
 147                 EXT3_FEATURE_INCOMPAT_EXTENTS |
 148                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 149                 EXT4_FEATURE_INCOMPAT_MMP,
 150         /* R/O compat */
 151         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 152                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 153                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 154                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 155                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 156                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
 157 #ifdef CONFIG_QUOTA
 158                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 159 #endif
 160                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
 161 };
 162
 163 static __u32 clear_ok_features[3] = {
 164         /* Compat */
 165         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 166                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 167                 EXT2_FEATURE_COMPAT_DIR_INDEX,
 168         /* Incompat */
 169         EXT2_FEATURE_INCOMPAT_FILETYPE |
 170                 EXT4_FEATURE_INCOMPAT_FLEX_BG |
 171                 EXT4_FEATURE_INCOMPAT_MMP,
 172         /* R/O compat */
 173         EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
 174                 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
 175                 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
 176                 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
 177                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
 178 #ifdef CONFIG_QUOTA
 179                 EXT4_FEATURE_RO_COMPAT_QUOTA |
 180 #endif
 181                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
 182 };
 183
 184 /**
 185  * Try to get journal super block if any
 186  */
 187 static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
 188 {
 189         int retval;
 190         journal_superblock_t *jsb;
 191
 192         if (!(jfs->super->s_feature_incompat &
 193             EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
 194                 return EXT2_ET_UNSUPP_FEATURE;
 195         }
 196
 197         /* Get the journal superblock */
 198         if ((retval = io_channel_read_blk64(jfs->io,
 199             ext2fs_journal_sb_start(jfs->blocksize), -SUPERBLOCK_SIZE, buf))) {
 200                 com_err(program_name, retval, "%s",
 201                 _("while reading journal superblock"));
 202                 return retval;
 203         }
 204
 205         jsb = (journal_superblock_t *) buf;
 206         if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
 207             (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
 208                 fputs(_("Journal superblock not found!\n"), stderr);
 209                 return EXT2_ET_BAD_MAGIC;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
 216                           int nr_users)
 217 {
 218         int i;
 219         for (i = 0; i < nr_users; i++) {
 220                 if (memcmp(uuid, &s_users[i * UUID_SIZE], UUID_SIZE) == 0)
 221                         return &s_users[i * UUID_SIZE];
 222         }
 223
 224         return NULL;
 225 }
 226
 227 /*
 228  * Remove an external journal from the filesystem
 229  */
 230 static int remove_journal_device(ext2_filsys fs)
 231 {
 232         char            *journal_path;
 233         ext2_filsys     jfs;
 234         char            buf[SUPERBLOCK_SIZE];
 235         journal_superblock_t    *jsb;
 236         int             i, nr_users;
 237         errcode_t       retval;
 238         int             commit_remove_journal = 0;
 239         io_manager      io_ptr;
 240
 241         if (f_flag)
 242                 commit_remove_journal = 1; /* force removal even if error */
 243
 244         uuid_unparse(fs->super->s_journal_uuid, buf);
 245         journal_path = blkid_get_devname(NULL, "UUID", buf);
 246
 247         if (!journal_path) {
 248                 journal_path =
 249                         ext2fs_find_block_device(fs->super->s_journal_dev);
 250                 if (!journal_path)
 251                         goto no_valid_journal;
 252         }
 253
 254 #ifdef CONFIG_TESTIO_DEBUG
 255         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
 256                 io_ptr = test_io_manager;
 257                 test_io_backing_manager = unix_io_manager;
 258         } else
 259 #endif
 260                 io_ptr = unix_io_manager;
 261         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 262                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 263                              fs->blocksize, io_ptr, &jfs);
 264         if (retval) {
 265                 com_err(program_name, retval, "%s",
 266                         _("while trying to open external journal"));
 267                 goto no_valid_journal;
 268         }
 269
 270         if ((retval = get_journal_sb(jfs, buf))) {
 271                 if (retval == EXT2_ET_UNSUPP_FEATURE)
 272                         fprintf(stderr, _("%s is not a journal device.\n"),
 273                                 journal_path);
 274                 goto no_valid_journal;
 275         }
 276
 277         jsb = (journal_superblock_t *) buf;
 278         /* Find the filesystem UUID */
 279         nr_users = ntohl(jsb->s_nr_users);
 280
 281         if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
 282                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 283                       stderr);
 284                 commit_remove_journal = 1;
 285                 goto no_valid_journal;
 286         }
 287         nr_users--;
 288         for (i = 0; i < nr_users; i++)
 289                 memcpy(&jsb->s_users[i * 16], &jsb->s_users[(i + 1) * 16], 16);
 290         jsb->s_nr_users = htonl(nr_users);
 291
 292         /* Write back the journal superblock */
 293         retval = io_channel_write_blk64(jfs->io,
 294                                         ext2fs_journal_sb_start(fs->blocksize),
 295                                         -SUPERBLOCK_SIZE, buf);
 296         if (retval) {
 297                 com_err(program_name, retval,
 298                         "while writing journal superblock.");
 299                 goto no_valid_journal;
 300         }
 301
 302         commit_remove_journal = 1;
 303
 304 no_valid_journal:
 305         if (commit_remove_journal == 0) {
 306                 fputs(_("Cannot locate journal device. It was NOT removed\n"
 307                         "Use -f option to remove missing journal device.\n"),
 308                       stderr);
 309                 return 1;
 310         }
 311         fs->super->s_journal_dev = 0;
 312         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 313         uuid_clear(fs->super->s_journal_uuid);
 314         ext2fs_mark_super_dirty(fs);
 315         fputs(_("Journal removed\n"), stdout);
 316         free(journal_path);
 317
 318         return 0;
 319 }
 320
 321 /* Helper function for remove_journal_inode */
 322 static int release_blocks_proc(ext2_filsys fs, blk64_t *blocknr,
 323                                e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 324                                blk64_t ref_block EXT2FS_ATTR((unused)),
 325                                int ref_offset EXT2FS_ATTR((unused)),
 326                                void *private EXT2FS_ATTR((unused)))
 327 {
 328         blk64_t block;
 329         int     group;
 330
 331         block = *blocknr;
 332         ext2fs_unmark_block_bitmap2(fs->block_map, block);
 333         group = ext2fs_group_of_blk2(fs, block);
 334         ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) + 1);
 335         ext2fs_group_desc_csum_set(fs, group);
 336         ext2fs_free_blocks_count_add(fs->super, EXT2FS_CLUSTER_RATIO(fs));
 337         return 0;
 338 }
 339
 340 /*
 341  * Remove the journal inode from the filesystem
 342  */
 343 static errcode_t remove_journal_inode(ext2_filsys fs)
 344 {
 345         struct ext2_inode       inode;
 346         errcode_t               retval;
 347         ino_t                   ino = fs->super->s_journal_inum;
 348
 349         retval = ext2fs_read_inode(fs, ino,  &inode);
 350         if (retval) {
 351                 com_err(program_name, retval, "%s",
 352                         _("while reading journal inode"));
 353                 return retval;
 354         }
 355         if (ino == EXT2_JOURNAL_INO) {
 356                 retval = ext2fs_read_bitmaps(fs);
 357                 if (retval) {
 358                         com_err(program_name, retval, "%s",
 359                                 _("while reading bitmaps"));
 360                         return retval;
 361                 }
 362                 retval = ext2fs_block_iterate3(fs, ino,
 363                                                BLOCK_FLAG_READ_ONLY, NULL,
 364                                                release_blocks_proc, NULL);
 365                 if (retval) {
 366                         com_err(program_name, retval, "%s",
 367                                 _("while clearing journal inode"));
 368                         return retval;
 369                 }
 370                 memset(&inode, 0, sizeof(inode));
 371                 ext2fs_mark_bb_dirty(fs);
 372                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 373         } else
 374                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 375         retval = ext2fs_write_inode(fs, ino, &inode);
 376         if (retval) {
 377                 com_err(program_name, retval, "%s",
 378                         _("while writing journal inode"));
 379                 return retval;
 380         }
 381         fs->super->s_journal_inum = 0;
 382         memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
 383         ext2fs_mark_super_dirty(fs);
 384
 385         return 0;
 386 }
 387
 388 /*
 389  * Update the default mount options
 390  */
 391 static int update_mntopts(ext2_filsys fs, char *mntopts)
 392 {
 393         struct ext2_super_block *sb = fs->super;
 394
 395         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 396                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 397                         mntopts);
 398                 return 1;
 399         }
 400         ext2fs_mark_super_dirty(fs);
 401
 402         return 0;
 403 }
 404
 405 static int check_fsck_needed(ext2_filsys fs)
 406 {
 407         if (fs->super->s_state & EXT2_VALID_FS)
 408                 return 0;
 409         printf("\n%s\n", _(please_fsck));
 410         if (mount_flags & EXT2_MF_READONLY)
 411                 printf("%s", _("(and reboot afterwards!)\n"));
 412         return 1;
 413 }
 414
 415 static void request_dir_fsck_afterwards(ext2_filsys fs)
 416 {
 417         static int requested;
 418
 419         if (requested++)
 420                 return;
 421         fs->super->s_state &= ~EXT2_VALID_FS;
 422         printf("\n%s\n", _(please_dir_fsck));
 423         if (mount_flags & EXT2_MF_READONLY)
 424                 printf("%s", _("(and reboot afterwards!)\n"));
 425 }
 426
 427 static void request_fsck_afterwards(ext2_filsys fs)
 428 {
 429         static int requested = 0;
 430
 431         if (requested++)
 432                 return;
 433         fs->super->s_state &= ~EXT2_VALID_FS;
 434         printf("\n%s\n", _(please_fsck));
 435         if (mount_flags & EXT2_MF_READONLY)
 436                 printf("%s", _("(and reboot afterwards!)\n"));
 437 }
 438
 439 /* Rewrite extents */
 440 static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
 441                                  struct ext2_inode *inode)
 442 {
 443         ext2_extent_handle_t    handle;
 444         struct ext2fs_extent    extent;
 445         errcode_t               errcode;
 446         struct ext2_extent_info info;
 447
 448         if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
 449             !EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 450                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
 451                 return 0;
 452
 453         errcode = ext2fs_extent_open(fs, ino, &handle);
 454         if (errcode)
 455                 return errcode;
 456
 457         errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
 458         if (errcode)
 459                 goto out;
 460
 461         do {
 462                 errcode = ext2fs_extent_get_info(handle, &info);
 463                 if (errcode)
 464                         break;
 465
 466                 /*
 467                  * If this is the first extent in an extent block that we
 468                  * haven't visited, rewrite the extent to force the ETB
 469                  * checksum to be rewritten.
 470                  */
 471                 if (info.curr_entry == 1 && info.curr_level != 0 &&
 472                     !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
 473                         errcode = ext2fs_extent_replace(handle, 0, &extent);
 474                         if (errcode)
 475                                 break;
 476                 }
 477
 478                 /* Skip to the end of a block of leaf nodes */
 479                 if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
 480                         errcode = ext2fs_extent_get(handle,
 481                                                     EXT2_EXTENT_LAST_SIB,
 482                                                     &extent);
 483                         if (errcode)
 484                                 break;
 485                 }
 486
 487                 errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
 488         } while (errcode == 0);
 489
 490 out:
 491         /* Ok if we run off the end */
 492         if (errcode == EXT2_ET_EXTENT_NO_NEXT)
 493                 errcode = 0;
 494         ext2fs_extent_free(handle);
 495         return errcode;
 496 }
 497
 498 /*
 499  * Rewrite directory blocks with checksums
 500  */
 501 struct rewrite_dir_context {
 502         char *buf;
 503         errcode_t errcode;
 504         ext2_ino_t dir;
 505         int is_htree;
 506 };
 507
 508 static int rewrite_dir_block(ext2_filsys fs,
 509                              blk64_t    *blocknr,
 510                              e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
 511                              blk64_t    ref_block EXT2FS_ATTR((unused)),
 512                              int        ref_offset EXT2FS_ATTR((unused)),
 513                              void       *priv_data)
 514 {
 515         struct ext2_dx_countlimit *dcl = NULL;
 516         struct rewrite_dir_context *ctx = priv_data;
 517         int dcl_offset, changed = 0;
 518
 519         ctx->errcode = ext2fs_read_dir_block4(fs, *blocknr, ctx->buf, 0,
 520                                               ctx->dir);
 521         if (ctx->errcode)
 522                 return BLOCK_ABORT;
 523
 524         /* if htree node... */
 525         if (ctx->is_htree)
 526                 ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
 527                                          &dcl, &dcl_offset);
 528         if (dcl) {
 529                 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 530                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
 531                         /* Ensure limit is the max size */
 532                         int max_entries = (fs->blocksize - dcl_offset) /
 533                                           sizeof(struct ext2_dx_entry);
 534                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries) {
 535                                 changed = 1;
 536                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 537                         }
 538                 } else {
 539                         /* If htree block is full then rebuild the dir */
 540                         if (ext2fs_le16_to_cpu(dcl->count) ==
 541                             ext2fs_le16_to_cpu(dcl->limit)) {
 542                                 request_dir_fsck_afterwards(fs);
 543                                 return 0;
 544                         }
 545                         /*
 546                          * Ensure dcl->limit is small enough to leave room for
 547                          * the checksum tail.
 548                          */
 549                         int max_entries = (fs->blocksize - (dcl_offset +
 550                                                 sizeof(struct ext2_dx_tail))) /
 551                                           sizeof(struct ext2_dx_entry);
 552                         if (ext2fs_le16_to_cpu(dcl->limit) != max_entries)
 553                                 dcl->limit = ext2fs_cpu_to_le16(max_entries);
 554                         /* Always rewrite checksum */
 555                         changed = 1;
 556                 }
 557         } else {
 558                 unsigned int rec_len, name_size;
 559                 char *top = ctx->buf + fs->blocksize;
 560                 struct ext2_dir_entry *de = (struct ext2_dir_entry *)ctx->buf;
 561                 struct ext2_dir_entry *last_de = NULL, *penultimate_de = NULL;
 562
 563                 /* Find last and penultimate dirent */
 564                 while ((char *)de < top) {
 565                         penultimate_de = last_de;
 566                         last_de = de;
 567                         ctx->errcode = ext2fs_get_rec_len(fs, de, &rec_len);
 568                         if (!ctx->errcode && !rec_len)
 569                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 570                         if (ctx->errcode)
 571                                 return BLOCK_ABORT;
 572                         de = (struct ext2_dir_entry *)(((char *)de) + rec_len);
 573                 }
 574                 ctx->errcode = ext2fs_get_rec_len(fs, last_de, &rec_len);
 575                 if (ctx->errcode)
 576                         return BLOCK_ABORT;
 577                 name_size = ext2fs_dirent_name_len(last_de);
 578
 579                 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 580                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
 581                         if (!penultimate_de)
 582                                 return 0;
 583                         if (last_de->inode ||
 584                             name_size ||
 585                             rec_len != sizeof(struct ext2_dir_entry_tail))
 586                                 return 0;
 587                         /*
 588                          * The last dirent is unused and the right length to
 589                          * have stored a checksum.  Erase it.
 590                          */
 591                         ctx->errcode = ext2fs_get_rec_len(fs, penultimate_de,
 592                                                           &rec_len);
 593                         if (!rec_len)
 594                                 ctx->errcode = EXT2_ET_DIR_CORRUPTED;
 595                         if (ctx->errcode)
 596                                 return BLOCK_ABORT;
 597                         ext2fs_set_rec_len(fs, rec_len +
 598                                         sizeof(struct ext2_dir_entry_tail),
 599                                         penultimate_de);
 600                         changed = 1;
 601                 } else {
 602                         unsigned csum_size = sizeof(struct ext2_dir_entry_tail);
 603                         struct ext2_dir_entry_tail *t;
 604
 605                         /*
 606                          * If the last dirent looks like the tail, just update
 607                          * the checksum.
 608                          */
 609                         if (!last_de->inode &&
 610                             rec_len == csum_size) {
 611                                 t = (struct ext2_dir_entry_tail *)last_de;
 612                                 t->det_reserved_name_len =
 613                                                 EXT2_DIR_NAME_LEN_CSUM;
 614                                 changed = 1;
 615                                 goto out;
 616                         }
 617                         if (name_size & 3)
 618                                 name_size = (name_size & ~3) + 4;
 619                         /* If there's not enough space for the tail, e2fsck */
 620                         if (rec_len <= (8 + name_size + csum_size)) {
 621                                 request_dir_fsck_afterwards(fs);
 622                                 return 0;
 623                         }
 624                         /* Shorten that last de and insert the tail */
 625                         ext2fs_set_rec_len(fs, rec_len - csum_size, last_de);
 626                         t = EXT2_DIRENT_TAIL(ctx->buf, fs->blocksize);
 627                         ext2fs_initialize_dirent_tail(fs, t);
 628
 629                         /* Always update checksum */
 630                         changed = 1;
 631                 }
 632         }
 633
 634 out:
 635         if (!changed)
 636                 return 0;
 637
 638         ctx->errcode = ext2fs_write_dir_block4(fs, *blocknr, ctx->buf,
 639                                                0, ctx->dir);
 640         if (ctx->errcode)
 641                 return BLOCK_ABORT;
 642
 643         return 0;
 644 }
 645
 646 static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
 647                                    struct ext2_inode *inode)
 648 {
 649         errcode_t       retval;
 650         struct rewrite_dir_context ctx;
 651
 652         retval = ext2fs_get_mem(fs->blocksize, &ctx.buf);
 653         if (retval)
 654                 return retval;
 655
 656         ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
 657         ctx.dir = dir;
 658         ctx.errcode = 0;
 659         retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
 660                                                 BLOCK_FLAG_DATA_ONLY,
 661                                        0, rewrite_dir_block, &ctx);
 662
 663         ext2fs_free_mem(&ctx.buf);
 664         if (retval)
 665                 return retval;
 666
 667         return ctx.errcode;
 668 }
 669
 670 /*
 671  * Forcibly set checksums in all inodes.
 672  */
 673 static void rewrite_inodes(ext2_filsys fs)
 674 {
 675         int length = EXT2_INODE_SIZE(fs->super);
 676         struct ext2_inode *inode, *zero;
 677         char            *ea_buf;
 678         ext2_inode_scan scan;
 679         errcode_t       retval;
 680         ext2_ino_t      ino;
 681         blk64_t         file_acl_block;
 682         int             inode_dirty;
 683
 684         if (fs->super->s_creator_os != EXT2_OS_LINUX)
 685                 return;
 686
 687         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 688         if (retval) {
 689                 com_err("set_csum", retval, "while opening inode scan");
 690                 exit(1);
 691         }
 692
 693         retval = ext2fs_get_mem(length, &inode);
 694         if (retval) {
 695                 com_err("set_csum", retval, "while allocating memory");
 696                 exit(1);
 697         }
 698
 699         retval = ext2fs_get_memzero(length, &zero);
 700         if (retval) {
 701                 com_err("set_csum", retval, "while allocating memory");
 702                 exit(1);
 703         }
 704
 705         retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
 706         if (retval) {
 707                 com_err("set_csum", retval, "while allocating memory");
 708                 exit(1);
 709         }
 710
 711         do {
 712                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 713                 if (retval) {
 714                         com_err("set_csum", retval, "while getting next inode");
 715                         exit(1);
 716                 }
 717                 if (!ino)
 718                         break;
 719                 if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 720                         inode_dirty = 1;
 721                 } else {
 722                         if (memcmp(inode, zero, length) != 0) {
 723                                 memset(inode, 0, length);
 724                                 inode_dirty = 1;
 725                         } else {
 726                                 inode_dirty = 0;
 727                         }
 728                 }
 729
 730                 if (inode_dirty) {
 731                         retval = ext2fs_write_inode_full(fs, ino, inode,
 732                                                          length);
 733                         if (retval) {
 734                                 com_err("set_csum", retval, "while writing "
 735                                         "inode");
 736                                 exit(1);
 737                         }
 738                 }
 739
 740                 retval = rewrite_extents(fs, ino, inode);
 741                 if (retval) {
 742                         com_err("rewrite_extents", retval,
 743                                 "while rewriting extents");
 744                         exit(1);
 745                 }
 746
 747                 if (LINUX_S_ISDIR(inode->i_mode) &&
 748                     ext2fs_inode_has_valid_blocks2(fs, inode)) {
 749                         retval = rewrite_directory(fs, ino, inode);
 750                         if (retval) {
 751                                 com_err("rewrite_directory", retval,
 752                                         "while rewriting directories");
 753                                 exit(1);
 754                         }
 755                 }
 756
 757                 file_acl_block = ext2fs_file_acl_block(fs, inode);
 758                 if (!file_acl_block)
 759                         continue;
 760                 retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
 761                 if (retval) {
 762                         com_err("rewrite_eablock", retval,
 763                                 "while rewriting extended attribute");
 764                         exit(1);
 765                 }
 766                 retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
 767                                                 ino);
 768                 if (retval) {
 769                         com_err("rewrite_eablock", retval,
 770                                 "while rewriting extended attribute");
 771                         exit(1);
 772                 }
 773         } while (ino);
 774
 775         ext2fs_free_mem(&zero);
 776         ext2fs_free_mem(&inode);
 777         ext2fs_free_mem(&ea_buf);
 778         ext2fs_close_inode_scan(scan);
 779 }
 780
 781 static void rewrite_metadata_checksums(ext2_filsys fs)
 782 {
 783         errcode_t retval;
 784         dgrp_t i;
 785
 786         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
 787         ext2fs_init_csum_seed(fs);
 788         for (i = 0; i < fs->group_desc_count; i++)
 789                 ext2fs_group_desc_csum_set(fs, i);
 790         retval = ext2fs_read_bitmaps(fs);
 791         if (retval) {
 792                 com_err("rewrite_metadata_checksums", retval,
 793                         "while reading bitmaps");
 794                 exit(1);
 795         }
 796         rewrite_inodes(fs);
 797         ext2fs_mark_ib_dirty(fs);
 798         ext2fs_mark_bb_dirty(fs);
 799         ext2fs_mmp_update2(fs, 1);
 800         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 801         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
 802         if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 803                                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
 804                 fs->super->s_checksum_type = EXT2_CRC32C_CHKSUM;
 805         else
 806                 fs->super->s_checksum_type = 0;
 807         ext2fs_mark_super_dirty(fs);
 808 }
 809
 810 static void enable_uninit_bg(ext2_filsys fs)
 811 {
 812         struct ext2_group_desc *gd;
 813         dgrp_t i;
 814
 815         for (i = 0; i < fs->group_desc_count; i++) {
 816                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 817                 gd->bg_itable_unused = 0;
 818                 gd->bg_flags = EXT2_BG_INODE_ZEROED;
 819                 ext2fs_group_desc_csum_set(fs, i);
 820         }
 821         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 822 }
 823
 824 static errcode_t zero_empty_inodes(ext2_filsys fs)
 825 {
 826         int length = EXT2_INODE_SIZE(fs->super);
 827         struct ext2_inode *inode = NULL;
 828         ext2_inode_scan scan;
 829         errcode_t       retval;
 830         ext2_ino_t      ino;
 831
 832         retval = ext2fs_open_inode_scan(fs, 0, &scan);
 833         if (retval)
 834                 goto out;
 835
 836         retval = ext2fs_get_mem(length, &inode);
 837         if (retval)
 838                 goto out;
 839
 840         do {
 841                 retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
 842                 if (retval)
 843                         goto out;
 844                 if (!ino)
 845                         break;
 846                 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
 847                         memset(inode, 0, length);
 848                         retval = ext2fs_write_inode_full(fs, ino, inode,
 849                                                          length);
 850                         if (retval)
 851                                 goto out;
 852                 }
 853         } while (1);
 854
 855 out:
 856         ext2fs_free_mem(&inode);
 857         ext2fs_close_inode_scan(scan);
 858         return retval;
 859 }
 860
 861 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 862 {
 863         struct ext2_group_desc *gd;
 864         dgrp_t i;
 865         errcode_t retval;
 866         blk64_t b, c, d;
 867
 868         /* Load bitmaps to ensure that the uninit ones get written out */
 869         fs->super->s_feature_ro_compat |= csum_feature_flag;
 870         retval = ext2fs_read_bitmaps(fs);
 871         fs->super->s_feature_ro_compat &= ~csum_feature_flag;
 872         if (retval) {
 873                 com_err("disable_uninit_bg", retval,
 874                         "while reading bitmaps");
 875                 request_fsck_afterwards(fs);
 876                 return retval;
 877         }
 878         ext2fs_mark_ib_dirty(fs);
 879         ext2fs_mark_bb_dirty(fs);
 880
 881         /* If we're only turning off uninit_bg, zero the inodes */
 882         if (csum_feature_flag == EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
 883                 retval = zero_empty_inodes(fs);
 884                 if (retval) {
 885                         com_err("disable_uninit_bg", retval,
 886                                 "while zeroing unused inodes");
 887                         request_fsck_afterwards(fs);
 888                         return retval;
 889                 }
 890         }
 891
 892         /* The bbitmap is zeroed; we must mark group metadata blocks in use */
 893         for (i = 0; i < fs->group_desc_count; i++) {
 894                 b = ext2fs_block_bitmap_loc(fs, i);
 895                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 896                 b = ext2fs_inode_bitmap_loc(fs, i);
 897                 ext2fs_mark_block_bitmap2(fs->block_map, b);
 898
 899                 retval = ext2fs_super_and_bgd_loc2(fs, i, &b, &c, &d, NULL);
 900                 if (retval == 0 && b)
 901                         ext2fs_mark_block_bitmap2(fs->block_map, b);
 902                 if (retval == 0 && c)
 903                         ext2fs_mark_block_bitmap2(fs->block_map, c);
 904                 if (retval == 0 && d)
 905                         ext2fs_mark_block_bitmap2(fs->block_map, d);
 906                 if (retval) {
 907                         com_err("disable_uninit_bg", retval,
 908                                 "while initializing block bitmaps");
 909                         request_fsck_afterwards(fs);
 910                 }
 911
 912                 gd = ext2fs_group_desc(fs, fs->group_desc, i);
 913                 gd->bg_itable_unused = 0;
 914                 gd->bg_flags = 0;
 915                 ext2fs_group_desc_csum_set(fs, i);
 916         }
 917         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 918         ext2fs_mark_super_dirty(fs);
 919
 920         return 0;
 921 }
 922
 923 /*
 924  * Update the feature set as provided by the user.
 925  */
 926 static int update_feature_set(ext2_filsys fs, char *features)
 927 {
 928         struct ext2_super_block *sb = fs->super;
 929         __u32           old_features[3];
 930         int             type_err;
 931         unsigned int    mask_err;
 932         errcode_t       err;
 933
 934 #define FEATURE_ON(type, mask) (!(old_features[(type)] & (mask)) && \
 935                                 ((&sb->s_feature_compat)[(type)] & (mask)))
 936 #define FEATURE_OFF(type, mask) ((old_features[(type)] & (mask)) && \
 937                                  !((&sb->s_feature_compat)[(type)] & (mask)))
 938 #define FEATURE_CHANGED(type, mask) ((mask) & \
 939                      (old_features[(type)] ^ (&sb->s_feature_compat)[(type)]))
 940
 941         old_features[E2P_FEATURE_COMPAT] = sb->s_feature_compat;
 942         old_features[E2P_FEATURE_INCOMPAT] = sb->s_feature_incompat;
 943         old_features[E2P_FEATURE_RO_INCOMPAT] = sb->s_feature_ro_compat;
 944
 945         if (e2p_edit_feature2(features, &sb->s_feature_compat,
 946                               ok_features, clear_ok_features,
 947                               &type_err, &mask_err)) {
 948                 if (!mask_err)
 949                         fprintf(stderr,
 950                                 _("Invalid filesystem option set: %s\n"),
 951                                 features);
 952                 else if (type_err & E2P_FEATURE_NEGATE_FLAG)
 953                         fprintf(stderr, _("Clearing filesystem feature '%s' "
 954                                           "not supported.\n"),
 955                                 e2p_feature2string(type_err &
 956                                                    E2P_FEATURE_TYPE_MASK,
 957                                                    mask_err));
 958                 else
 959                         fprintf(stderr, _("Setting filesystem feature '%s' "
 960                                           "not supported.\n"),
 961                                 e2p_feature2string(type_err, mask_err));
 962                 return 1;
 963         }
 964
 965         if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
 966                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 967                     !(mount_flags & EXT2_MF_READONLY)) {
 968                         fputs(_("The has_journal feature may only be "
 969                                 "cleared when the filesystem is\n"
 970                                 "unmounted or mounted "
 971                                 "read-only.\n"), stderr);
 972                         return 1;
 973                 }
 974                 if ((sb->s_feature_incompat &
 975                     EXT3_FEATURE_INCOMPAT_RECOVER) &&
 976                     f_flag < 2) {
 977                         fputs(_("The needs_recovery flag is set.  "
 978                                 "Please run e2fsck before clearing\n"
 979                                 "the has_journal flag.\n"), stderr);
 980                         return 1;
 981                 }
 982                 if (sb->s_journal_inum) {
 983                         if (remove_journal_inode(fs))
 984                                 return 1;
 985                 }
 986                 if (sb->s_journal_dev) {
 987                         if (remove_journal_device(fs))
 988                                 return 1;
 989                 }
 990         }
 991
 992         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
 993                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
 994                 if (sb->s_feature_incompat &
 995                         EXT2_FEATURE_INCOMPAT_META_BG) {
 996                         fputs(_("Setting filesystem feature 'sparse_super' "
 997                                 "not supported\nfor filesystems with "
 998                                 "the meta_bg feature enabled.\n"),
 999                                 stderr);
1000                         return 1;
1001                 }
1002         }
1003
1004         if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1005                 int error;
1006
1007                 if ((mount_flags & EXT2_MF_MOUNTED) ||
1008                     (mount_flags & EXT2_MF_READONLY)) {
1009                         fputs(_("The multiple mount protection feature can't\n"
1010                                 "be set if the filesystem is mounted or\n"
1011                                 "read-only.\n"), stderr);
1012                         return 1;
1013                 }
1014
1015                 error = ext2fs_mmp_init(fs);
1016                 if (error) {
1017                         fputs(_("\nError while enabling multiple mount "
1018                                 "protection feature."), stderr);
1019                         return 1;
1020                 }
1021
1022                 /*
1023                  * We want to update group desc with the new free blocks count
1024                  */
1025                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1026
1027                 printf(_("Multiple mount protection has been enabled "
1028                          "with update interval %ds.\n"),
1029                        sb->s_mmp_update_interval);
1030         }
1031
1032         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_MMP)) {
1033                 int error;
1034
1035                 if (mount_flags & EXT2_MF_READONLY) {
1036                         fputs(_("The multiple mount protection feature cannot\n"
1037                                 "be disabled if the filesystem is readonly.\n"),
1038                                 stderr);
1039                         return 1;
1040                 }
1041
1042                 error = ext2fs_read_bitmaps(fs);
1043                 if (error) {
1044                         fputs(_("Error while reading bitmaps\n"), stderr);
1045                         return 1;
1046                 }
1047
1048                 error = ext2fs_mmp_read(fs, sb->s_mmp_block, NULL);
1049                 if (error) {
1050                         struct mmp_struct *mmp_cmp = fs->mmp_cmp;
1051
1052                         if (error == EXT2_ET_MMP_MAGIC_INVALID)
1053                                 printf(_("Magic number in MMP block does not "
1054                                          "match. expected: %x, actual: %x\n"),
1055                                          EXT4_MMP_MAGIC, mmp_cmp->mmp_magic);
1056                         else
1057                                 com_err(program_name, error, "%s",
1058                                         _("while reading MMP block."));
1059                         goto mmp_error;
1060                 }
1061
1062                 /* We need to force out the group descriptors as well */
1063                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1064                 ext2fs_block_alloc_stats2(fs, sb->s_mmp_block, -1);
1065 mmp_error:
1066                 sb->s_mmp_block = 0;
1067                 sb->s_mmp_update_interval = 0;
1068         }
1069
1070         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1071                 /*
1072                  * If adding a journal flag, let the create journal
1073                  * code below handle setting the flag and creating the
1074                  * journal.  We supply a default size if necessary.
1075                  */
1076                 if (!journal_size)
1077                         journal_size = -1;
1078                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1079         }
1080
1081         if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX)) {
1082                 if (!sb->s_def_hash_version)
1083                         sb->s_def_hash_version = EXT2_HASH_HALF_MD4;
1084                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
1085                         uuid_generate((unsigned char *) sb->s_hash_seed);
1086         }
1087
1088         if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
1089                 if (ext2fs_check_desc(fs)) {
1090                         fputs(_("Clearing the flex_bg flag would "
1091                                 "cause the the filesystem to be\n"
1092                                 "inconsistent.\n"), stderr);
1093                         return 1;
1094                 }
1095         }
1096
1097         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1098                             EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
1099                 if ((mount_flags & EXT2_MF_MOUNTED) &&
1100                     !(mount_flags & EXT2_MF_READONLY)) {
1101                         fputs(_("The huge_file feature may only be "
1102                                 "cleared when the filesystem is\n"
1103                                 "unmounted or mounted "
1104                                 "read-only.\n"), stderr);
1105                         return 1;
1106                 }
1107         }
1108
1109         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1110                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1111                 if (check_fsck_needed(fs))
1112                         exit(1);
1113                 if (mount_flags & EXT2_MF_MOUNTED)
1114                         fputs(_("Cannot enable metadata_csum on a mounted "
1115                                 "filesystem!\n"), stderr);
1116                 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
1117                                 EXT3_FEATURE_INCOMPAT_EXTENTS))
1118                         printf("%s",
1119                                _("Extents are not enabled.  The file extent "
1120                                  "tree can be checksummed, whereas block maps "
1121                                  "cannot.  Not enabling extents reduces the "
1122                                  "coverage of metadata checksumming.  "
1123                                  "Re-run with -O extent to rectify.\n"));
1124                 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
1125                                 EXT4_FEATURE_INCOMPAT_64BIT))
1126                         printf("%s",
1127                                _("64-bit filesystem support is not enabled.  "
1128                                  "The larger fields afforded by this feature "
1129                                  "enable full-strength checksumming.  "
1130                                  "Run resize2fs -b to rectify.\n"));
1131                 rewrite_checksums = 1;
1132                 /* metadata_csum supersedes uninit_bg */
1133                 fs->super->s_feature_ro_compat &=
1134                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1135
1136                 /* if uninit_bg was previously off, rewrite group desc */
1137                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1138                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1139                         enable_uninit_bg(fs);
1140
1141                 /*
1142                  * Since metadata_csum supersedes uninit_bg, pretend like
1143                  * uninit_bg has been off all along.
1144                  */
1145                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1146                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1147         }
1148
1149         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1150                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1151                 __u32   test_features[3];
1152
1153                 if (check_fsck_needed(fs))
1154                         exit(1);
1155                 if (mount_flags & EXT2_MF_MOUNTED)
1156                         fputs(_("Cannot disable metadata_csum on a mounted "
1157                                 "filesystem!\n"), stderr);
1158                 rewrite_checksums = 1;
1159
1160                 /* Enable uninit_bg unless the user expressly turned it off */
1161                 memcpy(test_features, old_features, sizeof(test_features));
1162                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1163                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1164                 e2p_edit_feature2(features, test_features, ok_features,
1165                                   clear_ok_features, NULL, NULL);
1166                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1167                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1168                         fs->super->s_feature_ro_compat |=
1169                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1170
1171                 /*
1172                  * If we're turning off metadata_csum and not turning on
1173                  * uninit_bg, rewrite group desc.
1174                  */
1175                 if (!(fs->super->s_feature_ro_compat &
1176                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1177                         err = disable_uninit_bg(fs,
1178                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1179                         if (err)
1180                                 return 1;
1181                 } else
1182                         /*
1183                          * metadata_csum previously provided uninit_bg, so if
1184                          * we're also setting the uninit_bg feature bit,
1185                          * pretend like it was previously enabled.  Checksums
1186                          * will be rewritten with crc16 later.
1187                          */
1188                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1189                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1190         }
1191
1192         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1193                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1194                 /* Do not enable uninit_bg when metadata_csum enabled */
1195                 if (fs->super->s_feature_ro_compat &
1196                     EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
1197                         fs->super->s_feature_ro_compat &=
1198                                 ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1199                 else
1200                         enable_uninit_bg(fs);
1201         }
1202
1203         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1204                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1205                 err = disable_uninit_bg(fs,
1206                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1207                 if (err)
1208                         return 1;
1209         }
1210
1211         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1212                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1213                 /*
1214                  * Set the Q_flag here and handle the quota options in the code
1215                  * below.
1216                  */
1217                 if (!Q_flag) {
1218                         Q_flag = 1;
1219                         /* Enable both user quota and group quota by default */
1220                         usrquota = QOPT_ENABLE;
1221                         grpquota = QOPT_ENABLE;
1222                 }
1223                 sb->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1224         }
1225
1226         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1227                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1228                 /*
1229                  * Set the Q_flag here and handle the quota options in the code
1230                  * below.
1231                  */
1232                 if (Q_flag)
1233                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1234                                 "arguments.\n"), stderr);
1235                 Q_flag = 1;
1236                 /* Disable both user quota and group quota by default */
1237                 usrquota = QOPT_DISABLE;
1238                 grpquota = QOPT_DISABLE;
1239         }
1240
1241         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1242             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1243              sb->s_feature_incompat))
1244                 ext2fs_update_dynamic_rev(fs);
1245
1246         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1247                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1248             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1249                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1250             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1251                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1252             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1253                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1254             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1255                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1256                 request_fsck_afterwards(fs);
1257
1258         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1259             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1260             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1261                 ext2fs_mark_super_dirty(fs);
1262
1263         return 0;
1264 }
1265
1266 /*
1267  * Add a journal to the filesystem.
1268  */
1269 static int add_journal(ext2_filsys fs)
1270 {
1271         unsigned long journal_blocks;
1272         errcode_t       retval;
1273         ext2_filsys     jfs;
1274         io_manager      io_ptr;
1275
1276         if (fs->super->s_feature_compat &
1277             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
1278                 fputs(_("The filesystem already has a journal.\n"), stderr);
1279                 goto err;
1280         }
1281         if (journal_device) {
1282                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1283                                         NULL))
1284                         proceed_question(-1);
1285                 check_mount(journal_device, 0, _("journal"));
1286 #ifdef CONFIG_TESTIO_DEBUG
1287                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1288                         io_ptr = test_io_manager;
1289                         test_io_backing_manager = unix_io_manager;
1290                 } else
1291 #endif
1292                         io_ptr = unix_io_manager;
1293                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1294                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1295                                      fs->blocksize, io_ptr, &jfs);
1296                 if (retval) {
1297                         com_err(program_name, retval,
1298                                 _("\n\twhile trying to open journal on %s\n"),
1299                                 journal_device);
1300                         goto err;
1301                 }
1302                 printf(_("Creating journal on device %s: "),
1303                        journal_device);
1304                 fflush(stdout);
1305
1306                 retval = ext2fs_add_journal_device(fs, jfs);
1307                 ext2fs_close_free(&jfs);
1308                 if (retval) {
1309                         com_err(program_name, retval,
1310                                 _("while adding filesystem to journal on %s"),
1311                                 journal_device);
1312                         goto err;
1313                 }
1314                 fputs(_("done\n"), stdout);
1315         } else if (journal_size) {
1316                 fputs(_("Creating journal inode: "), stdout);
1317                 fflush(stdout);
1318                 journal_blocks = figure_journal_size(journal_size, fs);
1319
1320                 if (journal_location_string)
1321                         journal_location =
1322                                 parse_num_blocks2(journal_location_string,
1323                                                   fs->super->s_log_block_size);
1324                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1325                                                    journal_location,
1326                                                    journal_flags);
1327                 if (retval) {
1328                         fprintf(stderr, "\n");
1329                         com_err(program_name, retval, "%s",
1330                                 _("\n\twhile trying to create journal file"));
1331                         return retval;
1332                 } else
1333                         fputs(_("done\n"), stdout);
1334                 /*
1335                  * If the filesystem wasn't mounted, we need to force
1336                  * the block group descriptors out.
1337                  */
1338                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1339                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1340         }
1341         print_check_message(fs->super->s_max_mnt_count,
1342                             fs->super->s_checkinterval);
1343         return 0;
1344
1345 err:
1346         free(journal_device);
1347         return 1;
1348 }
1349
1350 static void handle_quota_options(ext2_filsys fs)
1351 {
1352         quota_ctx_t qctx;
1353         ext2_ino_t qf_ino;
1354
1355         if (!usrquota && !grpquota)
1356                 /* Nothing to do. */
1357                 return;
1358
1359         quota_init_context(&qctx, fs, -1);
1360
1361         if (usrquota == QOPT_ENABLE || grpquota == QOPT_ENABLE)
1362                 quota_compute_usage(qctx);
1363
1364         if (usrquota == QOPT_ENABLE && !fs->super->s_usr_quota_inum) {
1365                 if ((qf_ino = quota_file_exists(fs, USRQUOTA,
1366                                                 QFMT_VFS_V1)) > 0)
1367                         quota_update_limits(qctx, qf_ino, USRQUOTA);
1368                 quota_write_inode(qctx, USRQUOTA);
1369         } else if (usrquota == QOPT_DISABLE) {
1370                 quota_remove_inode(fs, USRQUOTA);
1371         }
1372
1373         if (grpquota == QOPT_ENABLE && !fs->super->s_grp_quota_inum) {
1374                 if ((qf_ino = quota_file_exists(fs, GRPQUOTA,
1375                                                 QFMT_VFS_V1)) > 0)
1376                         quota_update_limits(qctx, qf_ino, GRPQUOTA);
1377                 quota_write_inode(qctx, GRPQUOTA);
1378         } else if (grpquota == QOPT_DISABLE) {
1379                 quota_remove_inode(fs, GRPQUOTA);
1380         }
1381
1382         quota_release_context(&qctx);
1383
1384         if ((usrquota == QOPT_ENABLE) || (grpquota == QOPT_ENABLE)) {
1385                 fs->super->s_feature_ro_compat |= EXT4_FEATURE_RO_COMPAT_QUOTA;
1386                 ext2fs_mark_super_dirty(fs);
1387         } else if (!fs->super->s_usr_quota_inum &&
1388                    !fs->super->s_grp_quota_inum) {
1389                 fs->super->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1390                 ext2fs_mark_super_dirty(fs);
1391         }
1392
1393         return;
1394 }
1395
1396 #ifdef CONFIG_QUOTA
1397 static void parse_quota_opts(const char *opts)
1398 {
1399         char    *buf, *token, *next, *p;
1400         int     len;
1401
1402         len = strlen(opts);
1403         buf = malloc(len+1);
1404         if (!buf) {
1405                 fputs(_("Couldn't allocate memory to parse quota "
1406                         "options!\n"), stderr);
1407                 exit(1);
1408         }
1409         strcpy(buf, opts);
1410         for (token = buf; token && *token; token = next) {
1411                 p = strchr(token, ',');
1412                 next = 0;
1413                 if (p) {
1414                         *p = 0;
1415                         next = p+1;
1416                 }
1417
1418                 if (strcmp(token, "usrquota") == 0) {
1419                         usrquota = QOPT_ENABLE;
1420                 } else if (strcmp(token, "^usrquota") == 0) {
1421                         usrquota = QOPT_DISABLE;
1422                 } else if (strcmp(token, "grpquota") == 0) {
1423                         grpquota = QOPT_ENABLE;
1424                 } else if (strcmp(token, "^grpquota") == 0) {
1425                         grpquota = QOPT_DISABLE;
1426                 } else {
1427                         fputs(_("\nBad quota options specified.\n\n"
1428                                 "Following valid quota options are available "
1429                                 "(pass by separating with comma):\n"
1430                                 "\t[^]usrquota\n"
1431                                 "\t[^]grpquota\n"
1432                                 "\n\n"), stderr);
1433                         free(buf);
1434                         exit(1);
1435                 }
1436         }
1437         free(buf);
1438 }
1439 #endif
1440
1441 static void parse_e2label_options(int argc, char ** argv)
1442 {
1443         if ((argc < 2) || (argc > 3)) {
1444                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1445                 exit(1);
1446         }
1447         io_options = strchr(argv[1], '?');
1448         if (io_options)
1449                 *io_options++ = 0;
1450         device_name = blkid_get_devname(NULL, argv[1], NULL);
1451         if (!device_name) {
1452                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1453                         argv[1]);
1454                 exit(1);
1455         }
1456         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1457         if (argc == 3) {
1458                 open_flag |= EXT2_FLAG_RW;
1459                 L_flag = 1;
1460                 new_label = argv[2];
1461         } else
1462                 print_label++;
1463 }
1464
1465 static time_t parse_time(char *str)
1466 {
1467         struct  tm      ts;
1468
1469         if (strcmp(str, "now") == 0) {
1470                 return (time(0));
1471         }
1472         memset(&ts, 0, sizeof(ts));
1473 #ifdef HAVE_STRPTIME
1474         strptime(str, "%Y%m%d%H%M%S", &ts);
1475 #else
1476         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1477                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1478         ts.tm_year -= 1900;
1479         ts.tm_mon -= 1;
1480         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1481             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1482             ts.tm_min > 59 || ts.tm_sec > 61)
1483                 ts.tm_mday = 0;
1484 #endif
1485         if (ts.tm_mday == 0) {
1486                 com_err(program_name, 0,
1487                         _("Couldn't parse date/time specifier: %s"),
1488                         str);
1489                 usage();
1490         }
1491         ts.tm_isdst = -1;
1492         return (mktime(&ts));
1493 }
1494
1495 static void parse_tune2fs_options(int argc, char **argv)
1496 {
1497         int c;
1498         char *tmp;
1499         struct group *gr;
1500         struct passwd *pw;
1501         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:";
1502
1503 #ifdef CONFIG_QUOTA
1504         strcat(optstring, "Q:");
1505 #endif
1506         open_flag = 0;
1507
1508         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1509         while ((c = getopt(argc, argv, optstring)) != EOF)
1510                 switch (c) {
1511                 case 'c':
1512                         max_mount_count = strtol(optarg, &tmp, 0);
1513                         if (*tmp || max_mount_count > 16000) {
1514                                 com_err(program_name, 0,
1515                                         _("bad mounts count - %s"),
1516                                         optarg);
1517                                 usage();
1518                         }
1519                         if (max_mount_count == 0)
1520                                 max_mount_count = -1;
1521                         c_flag = 1;
1522                         open_flag = EXT2_FLAG_RW;
1523                         break;
1524                 case 'C':
1525                         mount_count = strtoul(optarg, &tmp, 0);
1526                         if (*tmp || mount_count > 16000) {
1527                                 com_err(program_name, 0,
1528                                         _("bad mounts count - %s"),
1529                                         optarg);
1530                                 usage();
1531                         }
1532                         C_flag = 1;
1533                         open_flag = EXT2_FLAG_RW;
1534                         break;
1535                 case 'e':
1536                         if (strcmp(optarg, "continue") == 0)
1537                                 errors = EXT2_ERRORS_CONTINUE;
1538                         else if (strcmp(optarg, "remount-ro") == 0)
1539                                 errors = EXT2_ERRORS_RO;
1540                         else if (strcmp(optarg, "panic") == 0)
1541                                 errors = EXT2_ERRORS_PANIC;
1542                         else {
1543                                 com_err(program_name, 0,
1544                                         _("bad error behavior - %s"),
1545                                         optarg);
1546                                 usage();
1547                         }
1548                         e_flag = 1;
1549                         open_flag = EXT2_FLAG_RW;
1550                         break;
1551                 case 'E':
1552                         extended_cmd = optarg;
1553                         open_flag |= EXT2_FLAG_RW;
1554                         break;
1555                 case 'f': /* Force */
1556                         f_flag++;
1557                         break;
1558                 case 'g':
1559                         resgid = strtoul(optarg, &tmp, 0);
1560                         if (*tmp) {
1561                                 gr = getgrnam(optarg);
1562                                 if (gr == NULL)
1563                                         tmp = optarg;
1564                                 else {
1565                                         resgid = gr->gr_gid;
1566                                         *tmp = 0;
1567                                 }
1568                         }
1569                         if (*tmp) {
1570                                 com_err(program_name, 0,
1571                                         _("bad gid/group name - %s"),
1572                                         optarg);
1573                                 usage();
1574                         }
1575                         g_flag = 1;
1576                         open_flag = EXT2_FLAG_RW;
1577                         break;
1578                 case 'i':
1579                         interval = strtoul(optarg, &tmp, 0);
1580                         switch (*tmp) {
1581                         case 's':
1582                                 tmp++;
1583                                 break;
1584                         case '\0':
1585                         case 'd':
1586                         case 'D': /* days */
1587                                 interval *= 86400;
1588                                 if (*tmp != '\0')
1589                                         tmp++;
1590                                 break;
1591                         case 'm':
1592                         case 'M': /* months! */
1593                                 interval *= 86400 * 30;
1594                                 tmp++;
1595                                 break;
1596                         case 'w':
1597                         case 'W': /* weeks */
1598                                 interval *= 86400 * 7;
1599                                 tmp++;
1600                                 break;
1601                         }
1602                         if (*tmp) {
1603                                 com_err(program_name, 0,
1604                                         _("bad interval - %s"), optarg);
1605                                 usage();
1606                         }
1607                         i_flag = 1;
1608                         open_flag = EXT2_FLAG_RW;
1609                         break;
1610                 case 'j':
1611                         if (!journal_size)
1612                                 journal_size = -1;
1613                         open_flag = EXT2_FLAG_RW;
1614                         break;
1615                 case 'J':
1616                         parse_journal_opts(optarg);
1617                         open_flag = EXT2_FLAG_RW;
1618                         break;
1619                 case 'l':
1620                         l_flag = 1;
1621                         break;
1622                 case 'L':
1623                         new_label = optarg;
1624                         L_flag = 1;
1625                         open_flag |= EXT2_FLAG_RW |
1626                                 EXT2_FLAG_JOURNAL_DEV_OK;
1627                         break;
1628                 case 'm':
1629                         reserved_ratio = strtod(optarg, &tmp);
1630                         if (*tmp || reserved_ratio > 50 ||
1631                             reserved_ratio < 0) {
1632                                 com_err(program_name, 0,
1633                                         _("bad reserved block ratio - %s"),
1634                                         optarg);
1635                                 usage();
1636                         }
1637                         m_flag = 1;
1638                         open_flag = EXT2_FLAG_RW;
1639                         break;
1640                 case 'M':
1641                         new_last_mounted = optarg;
1642                         M_flag = 1;
1643                         open_flag = EXT2_FLAG_RW;
1644                         break;
1645                 case 'o':
1646                         if (mntopts_cmd) {
1647                                 com_err(program_name, 0, "%s",
1648                                         _("-o may only be specified once"));
1649                                 usage();
1650                         }
1651                         mntopts_cmd = optarg;
1652                         open_flag = EXT2_FLAG_RW;
1653                         break;
1654                 case 'O':
1655                         if (features_cmd) {
1656                                 com_err(program_name, 0, "%s",
1657                                         _("-O may only be specified once"));
1658                                 usage();
1659                         }
1660                         features_cmd = optarg;
1661                         open_flag = EXT2_FLAG_RW;
1662                         break;
1663 #ifdef CONFIG_QUOTA
1664                 case 'Q':
1665                         Q_flag = 1;
1666                         parse_quota_opts(optarg);
1667                         open_flag = EXT2_FLAG_RW;
1668                         break;
1669 #endif
1670                 case 'r':
1671                         reserved_blocks = strtoul(optarg, &tmp, 0);
1672                         if (*tmp) {
1673                                 com_err(program_name, 0,
1674                                         _("bad reserved blocks count - %s"),
1675                                         optarg);
1676                                 usage();
1677                         }
1678                         r_flag = 1;
1679                         open_flag = EXT2_FLAG_RW;
1680                         break;
1681                 case 's': /* Deprecated */
1682                         s_flag = atoi(optarg);
1683                         open_flag = EXT2_FLAG_RW;
1684                         break;
1685                 case 'T':
1686                         T_flag = 1;
1687                         last_check_time = parse_time(optarg);
1688                         open_flag = EXT2_FLAG_RW;
1689                         break;
1690                 case 'u':
1691                                 resuid = strtoul(optarg, &tmp, 0);
1692                                 if (*tmp) {
1693                                         pw = getpwnam(optarg);
1694                                         if (pw == NULL)
1695                                                 tmp = optarg;
1696                                         else {
1697                                                 resuid = pw->pw_uid;
1698                                                 *tmp = 0;
1699                                         }
1700                                 }
1701                                 if (*tmp) {
1702                                         com_err(program_name, 0,
1703                                                 _("bad uid/user name - %s"),
1704                                                 optarg);
1705                                         usage();
1706                                 }
1707                                 u_flag = 1;
1708                                 open_flag = EXT2_FLAG_RW;
1709                                 break;
1710                 case 'U':
1711                         new_UUID = optarg;
1712                         U_flag = 1;
1713                         open_flag = EXT2_FLAG_RW |
1714                                 EXT2_FLAG_JOURNAL_DEV_OK;
1715                         break;
1716                 case 'I':
1717                         new_inode_size = strtoul(optarg, &tmp, 0);
1718                         if (*tmp) {
1719                                 com_err(program_name, 0,
1720                                         _("bad inode size - %s"),
1721                                         optarg);
1722                                 usage();
1723                         }
1724                         if (!((new_inode_size &
1725                                (new_inode_size - 1)) == 0)) {
1726                                 com_err(program_name, 0,
1727                                         _("Inode size must be a "
1728                                           "power of two- %s"),
1729                                         optarg);
1730                                 usage();
1731                         }
1732                         open_flag = EXT2_FLAG_RW;
1733                         I_flag = 1;
1734                         break;
1735                 default:
1736                         usage();
1737                 }
1738         if (optind < argc - 1 || optind == argc)
1739                 usage();
1740         if (!open_flag && !l_flag)
1741                 usage();
1742         io_options = strchr(argv[optind], '?');
1743         if (io_options)
1744                 *io_options++ = 0;
1745         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1746         if (!device_name) {
1747                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1748                         argv[optind]);
1749                 exit(1);
1750         }
1751 }
1752
1753 #ifdef CONFIG_BUILD_FINDFS
1754 void do_findfs(int argc, char **argv)
1755 {
1756         char    *dev;
1757
1758         if ((argc != 2) ||
1759             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1760                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1761                 exit(2);
1762         }
1763         dev = blkid_get_devname(NULL, argv[1], NULL);
1764         if (!dev) {
1765                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1766                         argv[1]);
1767                 exit(1);
1768         }
1769         puts(dev);
1770         exit(0);
1771 }
1772 #endif
1773
1774 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1775 {
1776         char    *buf, *token, *next, *p, *arg;
1777         int     len, hash_alg;
1778         int     r_usage = 0;
1779
1780         len = strlen(opts);
1781         buf = malloc(len+1);
1782         if (!buf) {
1783                 fprintf(stderr, "%s",
1784                         _("Couldn't allocate memory to parse options!\n"));
1785                 return 1;
1786         }
1787         strcpy(buf, opts);
1788         for (token = buf; token && *token; token = next) {
1789                 p = strchr(token, ',');
1790                 next = 0;
1791                 if (p) {
1792                         *p = 0;
1793                         next = p+1;
1794                 }
1795                 arg = strchr(token, '=');
1796                 if (arg) {
1797                         *arg = 0;
1798                         arg++;
1799                 }
1800                 if (strcmp(token, "clear-mmp") == 0 ||
1801                     strcmp(token, "clear_mmp") == 0) {
1802                         clear_mmp = 1;
1803                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1804                         unsigned long intv;
1805                         if (!arg) {
1806                                 r_usage++;
1807                                 continue;
1808                         }
1809                         intv = strtoul(arg, &p, 0);
1810                         if (*p) {
1811                                 fprintf(stderr,
1812                                         _("Invalid mmp_update_interval: %s\n"),
1813                                         arg);
1814                                 r_usage++;
1815                                 continue;
1816                         }
1817                         if (intv == 0) {
1818                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1819                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1820                                 fprintf(stderr,
1821                                         _("mmp_update_interval too big: %lu\n"),
1822                                         intv);
1823                                 r_usage++;
1824                                 continue;
1825                         }
1826                         printf(P_("Setting multiple mount protection update "
1827                                   "interval to %lu second\n",
1828                                   "Setting multiple mount protection update "
1829                                   "interval to %lu seconds\n", intv),
1830                                intv);
1831                         fs->super->s_mmp_update_interval = intv;
1832                         ext2fs_mark_super_dirty(fs);
1833                 } else if (!strcmp(token, "test_fs")) {
1834                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
1835                         printf("Setting test filesystem flag\n");
1836                         ext2fs_mark_super_dirty(fs);
1837                 } else if (!strcmp(token, "^test_fs")) {
1838                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
1839                         printf("Clearing test filesystem flag\n");
1840                         ext2fs_mark_super_dirty(fs);
1841                 } else if (strcmp(token, "stride") == 0) {
1842                         if (!arg) {
1843                                 r_usage++;
1844                                 continue;
1845                         }
1846                         stride = strtoul(arg, &p, 0);
1847                         if (*p) {
1848                                 fprintf(stderr,
1849                                         _("Invalid RAID stride: %s\n"),
1850                                         arg);
1851                                 r_usage++;
1852                                 continue;
1853                         }
1854                         stride_set = 1;
1855                 } else if (strcmp(token, "stripe-width") == 0 ||
1856                            strcmp(token, "stripe_width") == 0) {
1857                         if (!arg) {
1858                                 r_usage++;
1859                                 continue;
1860                         }
1861                         stripe_width = strtoul(arg, &p, 0);
1862                         if (*p) {
1863                                 fprintf(stderr,
1864                                         _("Invalid RAID stripe-width: %s\n"),
1865                                         arg);
1866                                 r_usage++;
1867                                 continue;
1868                         }
1869                         stripe_width_set = 1;
1870                 } else if (strcmp(token, "hash_alg") == 0 ||
1871                            strcmp(token, "hash-alg") == 0) {
1872                         if (!arg) {
1873                                 r_usage++;
1874                                 continue;
1875                         }
1876                         hash_alg = e2p_string2hash(arg);
1877                         if (hash_alg < 0) {
1878                                 fprintf(stderr,
1879                                         _("Invalid hash algorithm: %s\n"),
1880                                         arg);
1881                                 r_usage++;
1882                                 continue;
1883                         }
1884                         fs->super->s_def_hash_version = hash_alg;
1885                         printf(_("Setting default hash algorithm "
1886                                  "to %s (%d)\n"),
1887                                arg, hash_alg);
1888                         ext2fs_mark_super_dirty(fs);
1889                 } else if (!strcmp(token, "mount_opts")) {
1890                         if (!arg) {
1891                                 r_usage++;
1892                                 continue;
1893                         }
1894                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
1895                                 fprintf(stderr,
1896                                         "Extended mount options too long\n");
1897                                 continue;
1898                         }
1899                         ext_mount_opts = strdup(arg);
1900                 } else
1901                         r_usage++;
1902         }
1903         if (r_usage) {
1904                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
1905                         "Extended options are separated by commas, "
1906                         "and may take an argument which\n"
1907                         "\tis set off by an equals ('=') sign.\n\n"
1908                         "Valid extended options are:\n"
1909                         "\tclear_mmp\n"
1910                         "\thash_alg=<hash algorithm>\n"
1911                         "\tmount_opts=<extended default mount options>\n"
1912                         "\tstride=<RAID per-disk chunk size in blocks>\n"
1913                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
1914                         "\ttest_fs\n"
1915                         "\t^test_fs\n"));
1916                 free(buf);
1917                 return 1;
1918         }
1919         free(buf);
1920
1921         return 0;
1922 }
1923
1924 /*
1925  * Fill in the block bitmap bmap with the information regarding the
1926  * blocks to be moved
1927  */
1928 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
1929                             ext2fs_block_bitmap bmap)
1930 {
1931         dgrp_t i;
1932         int retval;
1933         ext2_badblocks_list bb_list = 0;
1934         blk64_t j, needed_blocks = 0;
1935         blk64_t start_blk, end_blk;
1936
1937         retval = ext2fs_read_bb_inode(fs, &bb_list);
1938         if (retval)
1939                 return retval;
1940
1941         for (i = 0; i < fs->group_desc_count; i++) {
1942                 start_blk = ext2fs_inode_table_loc(fs, i) +
1943                                         fs->inode_blocks_per_group;
1944
1945                 end_blk = ext2fs_inode_table_loc(fs, i) +
1946                                         new_ino_blks_per_grp;
1947
1948                 for (j = start_blk; j < end_blk; j++) {
1949                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
1950                                 /*
1951                                  * IF the block is a bad block we fail
1952                                  */
1953                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
1954                                         ext2fs_badblocks_list_free(bb_list);
1955                                         return ENOSPC;
1956                                 }
1957
1958                                 ext2fs_mark_block_bitmap2(bmap, j);
1959                         } else {
1960                                 /*
1961                                  * We are going to use this block for
1962                                  * inode table. So mark them used.
1963                                  */
1964                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
1965                         }
1966                 }
1967                 needed_blocks += end_blk - start_blk;
1968         }
1969
1970         ext2fs_badblocks_list_free(bb_list);
1971         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
1972                 return ENOSPC;
1973
1974         return 0;
1975 }
1976
1977 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
1978 {
1979         dgrp_t group;
1980         group = ext2fs_group_of_blk2(fs, blk);
1981         if (ext2fs_block_bitmap_loc(fs, group) == blk)
1982                 return 1;
1983         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
1984                 return 1;
1985         return 0;
1986 }
1987
1988 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
1989 {
1990         blk64_t start_blk, end_blk;
1991         start_blk = fs->super->s_first_data_block +
1992                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
1993         /*
1994          * We cannot get new block beyond end_blk for for the last block group
1995          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
1996          */
1997         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
1998         if (blk >= start_blk && blk <= end_blk)
1999                 return 1;
2000         return 0;
2001 }
2002
2003 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
2004 {
2005
2006         char *buf;
2007         dgrp_t group = 0;
2008         errcode_t retval;
2009         int meta_data = 0;
2010         blk64_t blk, new_blk, goal;
2011         struct blk_move *bmv;
2012
2013         retval = ext2fs_get_mem(fs->blocksize, &buf);
2014         if (retval)
2015                 return retval;
2016
2017         for (new_blk = blk = fs->super->s_first_data_block;
2018              blk < ext2fs_blocks_count(fs->super); blk++) {
2019                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2020                         continue;
2021
2022                 if (ext2fs_is_meta_block(fs, blk)) {
2023                         /*
2024                          * If the block is mapping a fs meta data block
2025                          * like group desc/block bitmap/inode bitmap. We
2026                          * should find a block in the same group and fix
2027                          * the respective fs metadata pointers. Otherwise
2028                          * fail
2029                          */
2030                         group = ext2fs_group_of_blk2(fs, blk);
2031                         goal = ext2fs_group_first_block2(fs, group);
2032                         meta_data = 1;
2033
2034                 } else {
2035                         goal = new_blk;
2036                 }
2037                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2038                 if (retval)
2039                         goto err_out;
2040
2041                 /* new fs meta data block should be in the same group */
2042                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2043                         retval = ENOSPC;
2044                         goto err_out;
2045                 }
2046
2047                 /* Mark this block as allocated */
2048                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2049
2050                 /* Add it to block move list */
2051                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2052                 if (retval)
2053                         goto err_out;
2054
2055                 bmv->old_loc = blk;
2056                 bmv->new_loc = new_blk;
2057
2058                 list_add(&(bmv->list), &blk_move_list);
2059
2060                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2061                 if (retval)
2062                         goto err_out;
2063
2064                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2065                 if (retval)
2066                         goto err_out;
2067         }
2068
2069 err_out:
2070         ext2fs_free_mem(&buf);
2071         return retval;
2072 }
2073
2074 static blk64_t translate_block(blk64_t blk)
2075 {
2076         struct list_head *entry;
2077         struct blk_move *bmv;
2078
2079         list_for_each(entry, &blk_move_list) {
2080                 bmv = list_entry(entry, struct blk_move, list);
2081                 if (bmv->old_loc == blk)
2082                         return bmv->new_loc;
2083         }
2084
2085         return 0;
2086 }
2087
2088 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2089                          blk64_t *block_nr,
2090                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2091                          blk64_t ref_block EXT2FS_ATTR((unused)),
2092                          int ref_offset EXT2FS_ATTR((unused)),
2093                          void *priv_data)
2094 {
2095         int ret = 0;
2096         blk64_t new_blk;
2097         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2098
2099         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2100                 return 0;
2101         new_blk = translate_block(*block_nr);
2102         if (new_blk) {
2103                 *block_nr = new_blk;
2104                 /*
2105                  * This will force the ext2fs_write_inode in the iterator
2106                  */
2107                 ret |= BLOCK_CHANGED;
2108         }
2109
2110         return ret;
2111 }
2112
2113 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2114 {
2115         errcode_t retval = 0;
2116         ext2_ino_t ino;
2117         blk64_t blk;
2118         char *block_buf = 0;
2119         struct ext2_inode inode;
2120         ext2_inode_scan scan = NULL;
2121
2122         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2123         if (retval)
2124                 return retval;
2125
2126         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2127         if (retval)
2128                 goto err_out;
2129
2130         while (1) {
2131                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2132                 if (retval)
2133                         goto err_out;
2134
2135                 if (!ino)
2136                         break;
2137
2138                 if (inode.i_links_count == 0)
2139                         continue; /* inode not in use */
2140
2141                 /* FIXME!!
2142                  * If we end up modifying the journal inode
2143                  * the sb->s_jnl_blocks will differ. But a
2144                  * subsequent e2fsck fixes that.
2145                  * Do we need to fix this ??
2146                  */
2147
2148                 if (ext2fs_file_acl_block(fs, &inode) &&
2149                     ext2fs_test_block_bitmap2(bmap,
2150                                         ext2fs_file_acl_block(fs, &inode))) {
2151                         blk = translate_block(ext2fs_file_acl_block(fs,
2152                                                                     &inode));
2153                         if (!blk)
2154                                 continue;
2155
2156                         ext2fs_file_acl_block_set(fs, &inode, blk);
2157
2158                         /*
2159                          * Write the inode to disk so that inode table
2160                          * resizing can work
2161                          */
2162                         retval = ext2fs_write_inode(fs, ino, &inode);
2163                         if (retval)
2164                                 goto err_out;
2165                 }
2166
2167                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2168                         continue;
2169
2170                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2171                                                process_block, bmap);
2172                 if (retval)
2173                         goto err_out;
2174
2175         }
2176
2177 err_out:
2178         ext2fs_free_mem(&block_buf);
2179         ext2fs_close_inode_scan(scan);
2180
2181         return retval;
2182 }
2183
2184 /*
2185  * We need to scan for inode and block bitmaps that may need to be
2186  * moved.  This can take place if the filesystem was formatted for
2187  * RAID arrays using the mke2fs's extended option "stride".
2188  */
2189 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2190 {
2191         dgrp_t i;
2192         blk64_t blk, new_blk;
2193
2194         for (i = 0; i < fs->group_desc_count; i++) {
2195                 blk = ext2fs_block_bitmap_loc(fs, i);
2196                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2197                         new_blk = translate_block(blk);
2198                         if (!new_blk)
2199                                 continue;
2200                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2201                 }
2202
2203                 blk = ext2fs_inode_bitmap_loc(fs, i);
2204                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2205                         new_blk = translate_block(blk);
2206                         if (!new_blk)
2207                                 continue;
2208                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2209                 }
2210         }
2211         return 0;
2212 }
2213
2214 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2215 {
2216         dgrp_t i;
2217         blk64_t blk;
2218         errcode_t retval;
2219         int new_ino_blks_per_grp;
2220         unsigned int j;
2221         char *old_itable = NULL, *new_itable = NULL;
2222         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2223         unsigned long old_ino_size;
2224         int old_itable_size, new_itable_size;
2225
2226         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2227         old_ino_size = EXT2_INODE_SIZE(fs->super);
2228
2229         new_ino_blks_per_grp = ext2fs_div_ceil(
2230                                         EXT2_INODES_PER_GROUP(fs->super) *
2231                                         new_ino_size,
2232                                         fs->blocksize);
2233
2234         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2235
2236         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2237         if (retval)
2238                 return retval;
2239
2240         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2241         if (retval)
2242                 goto err_out;
2243
2244         tmp_old_itable = old_itable;
2245         tmp_new_itable = new_itable;
2246
2247         for (i = 0; i < fs->group_desc_count; i++) {
2248                 blk = ext2fs_inode_table_loc(fs, i);
2249                 retval = io_channel_read_blk64(fs->io, blk,
2250                                 fs->inode_blocks_per_group, old_itable);
2251                 if (retval)
2252                         goto err_out;
2253
2254                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2255                         memcpy(new_itable, old_itable, old_ino_size);
2256
2257                         memset(new_itable+old_ino_size, 0,
2258                                         new_ino_size - old_ino_size);
2259
2260                         new_itable += new_ino_size;
2261                         old_itable += old_ino_size;
2262                 }
2263
2264                 /* reset the pointer */
2265                 old_itable = tmp_old_itable;
2266                 new_itable = tmp_new_itable;
2267
2268                 retval = io_channel_write_blk64(fs->io, blk,
2269                                         new_ino_blks_per_grp, new_itable);
2270                 if (retval)
2271                         goto err_out;
2272         }
2273
2274         /* Update the meta data */
2275         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2276         ext2fs_free_inode_cache(fs->icache);
2277         fs->icache = 0;
2278         fs->super->s_inode_size = new_ino_size;
2279
2280 err_out:
2281         if (old_itable)
2282                 ext2fs_free_mem(&old_itable);
2283
2284         if (new_itable)
2285                 ext2fs_free_mem(&new_itable);
2286
2287         return retval;
2288 }
2289
2290 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2291 {
2292         blk64_t         blk;
2293         ext2_ino_t      ino;
2294         unsigned int    group = 0;
2295         unsigned int    count = 0;
2296         int             total_free = 0;
2297         int             group_free = 0;
2298
2299         /*
2300          * First calculate the block statistics
2301          */
2302         for (blk = fs->super->s_first_data_block;
2303              blk < ext2fs_blocks_count(fs->super); blk++) {
2304                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2305                         group_free++;
2306                         total_free++;
2307                 }
2308                 count++;
2309                 if ((count == fs->super->s_blocks_per_group) ||
2310                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2311                         ext2fs_bg_free_blocks_count_set(fs, group++,
2312                                                         group_free);
2313                         count = 0;
2314                         group_free = 0;
2315                 }
2316         }
2317         total_free = EXT2FS_C2B(fs, total_free);
2318         ext2fs_free_blocks_count_set(fs->super, total_free);
2319
2320         /*
2321          * Next, calculate the inode statistics
2322          */
2323         group_free = 0;
2324         total_free = 0;
2325         count = 0;
2326         group = 0;
2327
2328         /* Protect loop from wrap-around if s_inodes_count maxed */
2329         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2330                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2331                         group_free++;
2332                         total_free++;
2333                 }
2334                 count++;
2335                 if ((count == fs->super->s_inodes_per_group) ||
2336                     (ino == fs->super->s_inodes_count)) {
2337                         ext2fs_bg_free_inodes_count_set(fs, group++,
2338                                                         group_free);
2339                         count = 0;
2340                         group_free = 0;
2341                 }
2342         }
2343         fs->super->s_free_inodes_count = total_free;
2344         ext2fs_mark_super_dirty(fs);
2345         return 0;
2346 }
2347
2348 #define list_for_each_safe(pos, pnext, head) \
2349         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2350              pos = pnext, pnext = pos->next)
2351
2352 static void free_blk_move_list(void)
2353 {
2354         struct list_head *entry, *tmp;
2355         struct blk_move *bmv;
2356
2357         list_for_each_safe(entry, tmp, &blk_move_list) {
2358                 bmv = list_entry(entry, struct blk_move, list);
2359                 list_del(entry);
2360                 ext2fs_free_mem(&bmv);
2361         }
2362         return;
2363 }
2364
2365 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2366 {
2367         errcode_t retval;
2368         int new_ino_blks_per_grp;
2369         ext2fs_block_bitmap bmap;
2370
2371         retval = ext2fs_read_inode_bitmap(fs);
2372         if (retval) {
2373                 fputs(_("Failed to read inode bitmap\n"), stderr);
2374                 return retval;
2375         }
2376         retval = ext2fs_read_block_bitmap(fs);
2377         if (retval) {
2378                 fputs(_("Failed to read block bitmap\n"), stderr);
2379                 return retval;
2380         }
2381         INIT_LIST_HEAD(&blk_move_list);
2382
2383
2384         new_ino_blks_per_grp = ext2fs_div_ceil(
2385                                         EXT2_INODES_PER_GROUP(fs->super)*
2386                                         new_size,
2387                                         fs->blocksize);
2388
2389         /* We may change the file system.
2390          * Mark the file system as invalid so that
2391          * the user is prompted to run fsck.
2392          */
2393         fs->super->s_state &= ~EXT2_VALID_FS;
2394
2395         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2396                                                 &bmap);
2397         if (retval) {
2398                 fputs(_("Failed to allocate block bitmap when "
2399                                 "increasing inode size\n"), stderr);
2400                 return retval;
2401         }
2402         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2403         if (retval) {
2404                 fputs(_("Not enough space to increase inode size \n"), stderr);
2405                 goto err_out;
2406         }
2407         retval = move_block(fs, bmap);
2408         if (retval) {
2409                 fputs(_("Failed to relocate blocks during inode resize \n"),
2410                       stderr);
2411                 goto err_out;
2412         }
2413         retval = inode_scan_and_fix(fs, bmap);
2414         if (retval)
2415                 goto err_out_undo;
2416
2417         retval = group_desc_scan_and_fix(fs, bmap);
2418         if (retval)
2419                 goto err_out_undo;
2420
2421         retval = expand_inode_table(fs, new_size);
2422         if (retval)
2423                 goto err_out_undo;
2424
2425         ext2fs_calculate_summary_stats(fs);
2426
2427         fs->super->s_state |= EXT2_VALID_FS;
2428         /* mark super block and block bitmap as dirty */
2429         ext2fs_mark_super_dirty(fs);
2430         ext2fs_mark_bb_dirty(fs);
2431
2432 err_out:
2433         free_blk_move_list();
2434         ext2fs_free_block_bitmap(bmap);
2435
2436         return retval;
2437
2438 err_out_undo:
2439         free_blk_move_list();
2440         ext2fs_free_block_bitmap(bmap);
2441         fputs(_("Error in resizing the inode size.\n"
2442                         "Run e2undo to undo the "
2443                         "file system changes. \n"), stderr);
2444
2445         return retval;
2446 }
2447
2448 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2449 {
2450         errcode_t retval = 0;
2451         const char *tdb_dir;
2452         char *tdb_file;
2453         char *dev_name, *tmp_name;
2454
2455 #if 0 /* FIXME!! */
2456         /*
2457          * Configuration via a conf file would be
2458          * nice
2459          */
2460         profile_get_string(profile, "scratch_files",
2461                                         "directory", 0, 0,
2462                                         &tdb_dir);
2463 #endif
2464         tmp_name = strdup(name);
2465         if (!tmp_name) {
2466         alloc_fn_fail:
2467                 com_err(program_name, ENOMEM, "%s",
2468                         _("Couldn't allocate memory for tdb filename\n"));
2469                 return ENOMEM;
2470         }
2471         dev_name = basename(tmp_name);
2472
2473         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2474         if (!tdb_dir)
2475                 tdb_dir = "/var/lib/e2fsprogs";
2476
2477         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2478             access(tdb_dir, W_OK))
2479                 return 0;
2480
2481         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2482         if (!tdb_file)
2483                 goto alloc_fn_fail;
2484         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2485
2486         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2487                 retval = errno;
2488                 com_err(program_name, retval,
2489                         _("while trying to delete %s"), tdb_file);
2490                 free(tdb_file);
2491                 return retval;
2492         }
2493
2494         set_undo_io_backing_manager(*io_ptr);
2495         *io_ptr = undo_io_manager;
2496         set_undo_io_backup_file(tdb_file);
2497         printf(_("To undo the tune2fs operation please run "
2498                  "the command\n    e2undo %s %s\n\n"),
2499                  tdb_file, name);
2500         free(tdb_file);
2501         free(tmp_name);
2502         return retval;
2503 }
2504
2505 int
2506 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2507 {
2508         int retval, nr_users, start;
2509         journal_superblock_t *jsb;
2510         ext2_filsys jfs;
2511         __u8 *j_uuid;
2512         char *journal_path;
2513         char uuid[UUID_STR_SIZE];
2514         char buf[SUPERBLOCK_SIZE];
2515
2516         if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) ||
2517                 uuid_is_null(sb->s_journal_uuid))
2518                 return 0;
2519
2520         uuid_unparse(sb->s_journal_uuid, uuid);
2521         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2522         if (!journal_path)
2523                 return 0;
2524
2525         retval = ext2fs_open2(journal_path, io_options,
2526                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2527                               0, 0, unix_io_manager, &jfs);
2528         if (retval) {
2529                 com_err(program_name, retval,
2530                         _("while trying to open %s"),
2531                         journal_path);
2532                 return retval;
2533         }
2534
2535         retval = get_journal_sb(jfs, buf);
2536         if (retval != 0) {
2537                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2538                         fprintf(stderr, _("%s is not a journal device.\n"),
2539                                 journal_path);
2540                 return retval;
2541         }
2542
2543         jsb = (journal_superblock_t *) buf;
2544         /* Find the filesystem UUID */
2545         nr_users = ntohl(jsb->s_nr_users);
2546
2547         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2548         if (j_uuid == NULL) {
2549                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2550                       stderr);
2551                 return EXT2_ET_LOAD_EXT_JOURNAL;
2552         }
2553
2554         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2555
2556         start = ext2fs_journal_sb_start(jfs->blocksize);
2557         /* Write back the journal superblock */
2558         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2559         if (retval != 0) {
2560                 com_err(program_name, retval,
2561                         "while writing journal superblock.");
2562                 return retval;
2563         }
2564
2565         ext2fs_close(jfs);
2566
2567         return 0;
2568 }
2569
2570 int main(int argc, char **argv)
2571 {
2572         errcode_t retval;
2573         ext2_filsys fs;
2574         struct ext2_super_block *sb;
2575         io_manager io_ptr, io_ptr_orig = NULL;
2576         int rc = 0;
2577
2578 #ifdef ENABLE_NLS
2579         setlocale(LC_MESSAGES, "");
2580         setlocale(LC_CTYPE, "");
2581         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2582         textdomain(NLS_CAT_NAME);
2583         set_com_err_gettext(gettext);
2584 #endif
2585         if (argc && *argv)
2586                 program_name = *argv;
2587         add_error_table(&et_ext2_error_table);
2588
2589 #ifdef CONFIG_BUILD_FINDFS
2590         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2591                 do_findfs(argc, argv);
2592 #endif
2593         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2594                 parse_e2label_options(argc, argv);
2595         else
2596                 parse_tune2fs_options(argc, argv);
2597
2598 #ifdef CONFIG_TESTIO_DEBUG
2599         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2600                 io_ptr = test_io_manager;
2601                 test_io_backing_manager = unix_io_manager;
2602         } else
2603 #endif
2604                 io_ptr = unix_io_manager;
2605
2606 retry_open:
2607         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2608                 open_flag |= EXT2_FLAG_SKIP_MMP;
2609
2610         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2611
2612         /* keep the filesystem struct around to dump MMP data */
2613         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2614
2615         retval = ext2fs_open2(device_name, io_options, open_flag,
2616                               0, 0, io_ptr, &fs);
2617         if (retval) {
2618                 com_err(program_name, retval,
2619                         _("while trying to open %s"),
2620                         device_name);
2621                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2622                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2623                         dump_mmp_msg(fs->mmp_buf,
2624                                      _("If you are sure the filesystem "
2625                                        "is not in use on any node, run:\n"
2626                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2627                 else if (retval == EXT2_ET_MMP_FAILED)
2628                         dump_mmp_msg(fs->mmp_buf, NULL);
2629                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2630                         fprintf(stderr,
2631                                 _("MMP block magic is bad. Try to fix it by "
2632                                   "running:\n'e2fsck -f %s'\n"), device_name);
2633                 else if (retval == EXT2_ET_BAD_MAGIC)
2634                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2635                 else if (retval != EXT2_ET_MMP_FAILED)
2636                         fprintf(stderr, "%s",
2637                              _("Couldn't find valid filesystem superblock.\n"));
2638
2639                 ext2fs_free(fs);
2640                 exit(1);
2641         }
2642         if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
2643                                       EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2644                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2645                 ext2fs_free(fs);
2646                 exit(1);
2647         }
2648         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2649
2650         if (I_flag && !io_ptr_orig) {
2651                 /*
2652                  * Check the inode size is right so we can issue an
2653                  * error message and bail before setting up the tdb
2654                  * file.
2655                  */
2656                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2657                         fprintf(stderr, _("The inode size is already %lu\n"),
2658                                 new_inode_size);
2659                         rc = 1;
2660                         goto closefs;
2661                 }
2662                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2663                         fprintf(stderr, "%s",
2664                                 _("Shrinking inode size is not supported\n"));
2665                         rc = 1;
2666                         goto closefs;
2667                 }
2668                 if (new_inode_size > fs->blocksize) {
2669                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2670                                 new_inode_size, fs->blocksize);
2671                         rc = 1;
2672                         goto closefs;
2673                 }
2674
2675                 /*
2676                  * If inode resize is requested use the
2677                  * Undo I/O manager
2678                  */
2679                 io_ptr_orig = io_ptr;
2680                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2681                 if (retval) {
2682                         rc = 1;
2683                         goto closefs;
2684                 }
2685                 if (io_ptr != io_ptr_orig) {
2686                         ext2fs_close_free(&fs);
2687                         goto retry_open;
2688                 }
2689         }
2690
2691         sb = fs->super;
2692         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2693
2694         if (print_label) {
2695                 /* For e2label emulation */
2696                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2697                        sb->s_volume_name);
2698                 remove_error_table(&et_ext2_error_table);
2699                 goto closefs;
2700         }
2701
2702         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2703         if (retval) {
2704                 com_err("ext2fs_check_if_mount", retval,
2705                         _("while determining whether %s is mounted."),
2706                         device_name);
2707                 rc = 1;
2708                 goto closefs;
2709         }
2710         /* Normally we only need to write out the superblock */
2711         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2712
2713         if (c_flag) {
2714                 sb->s_max_mnt_count = max_mount_count;
2715                 ext2fs_mark_super_dirty(fs);
2716                 printf(_("Setting maximal mount count to %d\n"),
2717                        max_mount_count);
2718         }
2719         if (C_flag) {
2720                 sb->s_mnt_count = mount_count;
2721                 ext2fs_mark_super_dirty(fs);
2722                 printf(_("Setting current mount count to %d\n"), mount_count);
2723         }
2724         if (e_flag) {
2725                 sb->s_errors = errors;
2726                 ext2fs_mark_super_dirty(fs);
2727                 printf(_("Setting error behavior to %d\n"), errors);
2728         }
2729         if (g_flag) {
2730                 sb->s_def_resgid = resgid;
2731                 ext2fs_mark_super_dirty(fs);
2732                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2733         }
2734         if (i_flag) {
2735                 if ((unsigned long long)interval >= (1ULL << 32)) {
2736                         com_err(program_name, 0,
2737                                 _("interval between checks is too big (%lu)"),
2738                                 interval);
2739                         rc = 1;
2740                         goto closefs;
2741                 }
2742                 sb->s_checkinterval = interval;
2743                 ext2fs_mark_super_dirty(fs);
2744                 printf(_("Setting interval between checks to %lu seconds\n"),
2745                        interval);
2746         }
2747         if (m_flag) {
2748                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2749                                           ext2fs_blocks_count(sb) / 100.0);
2750                 ext2fs_mark_super_dirty(fs);
2751                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2752                         reserved_ratio, ext2fs_r_blocks_count(sb));
2753         }
2754         if (r_flag) {
2755                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2756                         com_err(program_name, 0,
2757                                 _("reserved blocks count is too big (%llu)"),
2758                                 reserved_blocks);
2759                         rc = 1;
2760                         goto closefs;
2761                 }
2762                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2763                 ext2fs_mark_super_dirty(fs);
2764                 printf(_("Setting reserved blocks count to %llu\n"),
2765                        reserved_blocks);
2766         }
2767         if (s_flag == 1) {
2768                 if (sb->s_feature_ro_compat &
2769                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
2770                         fputs(_("\nThe filesystem already has sparse "
2771                                 "superblocks.\n"), stderr);
2772                 } else if (sb->s_feature_incompat &
2773                         EXT2_FEATURE_INCOMPAT_META_BG) {
2774                         fputs(_("\nSetting the sparse superblock flag not "
2775                                 "supported\nfor filesystems with "
2776                                 "the meta_bg feature enabled.\n"),
2777                                 stderr);
2778                         rc = 1;
2779                         goto closefs;
2780                 } else {
2781                         sb->s_feature_ro_compat |=
2782                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
2783                         sb->s_state &= ~EXT2_VALID_FS;
2784                         ext2fs_mark_super_dirty(fs);
2785                         printf(_("\nSparse superblock flag set.  %s"),
2786                                _(please_fsck));
2787                 }
2788         }
2789         if (s_flag == 0) {
2790                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2791                       stderr);
2792                 rc = 1;
2793                 goto closefs;
2794         }
2795         if (T_flag) {
2796                 sb->s_lastcheck = last_check_time;
2797                 ext2fs_mark_super_dirty(fs);
2798                 printf(_("Setting time filesystem last checked to %s\n"),
2799                        ctime(&last_check_time));
2800         }
2801         if (u_flag) {
2802                 sb->s_def_resuid = resuid;
2803                 ext2fs_mark_super_dirty(fs);
2804                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
2805         }
2806         if (L_flag) {
2807                 if (strlen(new_label) > sizeof(sb->s_volume_name))
2808                         fputs(_("Warning: label too long, truncating.\n"),
2809                               stderr);
2810                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
2811                 strncpy(sb->s_volume_name, new_label,
2812                         sizeof(sb->s_volume_name));
2813                 ext2fs_mark_super_dirty(fs);
2814         }
2815         if (M_flag) {
2816                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
2817                 strncpy(sb->s_last_mounted, new_last_mounted,
2818                         sizeof(sb->s_last_mounted));
2819                 ext2fs_mark_super_dirty(fs);
2820         }
2821         if (mntopts_cmd) {
2822                 rc = update_mntopts(fs, mntopts_cmd);
2823                 if (rc)
2824                         goto closefs;
2825         }
2826         if (features_cmd) {
2827                 rc = update_feature_set(fs, features_cmd);
2828                 if (rc)
2829                         goto closefs;
2830         }
2831         if (extended_cmd) {
2832                 rc = parse_extended_opts(fs, extended_cmd);
2833                 if (rc)
2834                         goto closefs;
2835                 if (clear_mmp && !f_flag) {
2836                         fputs(_("Error in using clear_mmp. "
2837                                 "It must be used with -f\n"),
2838                               stderr);
2839                         goto closefs;
2840                 }
2841         }
2842         if (clear_mmp) {
2843                 rc = ext2fs_mmp_clear(fs);
2844                 goto closefs;
2845         }
2846         if (journal_size || journal_device) {
2847                 rc = add_journal(fs);
2848                 if (rc)
2849                         goto closefs;
2850         }
2851
2852         if (Q_flag) {
2853                 if (mount_flags & EXT2_MF_MOUNTED) {
2854                         fputs(_("The quota feature may only be changed when "
2855                                 "the filesystem is unmounted.\n"), stderr);
2856                         rc = 1;
2857                         goto closefs;
2858                 }
2859                 handle_quota_options(fs);
2860         }
2861
2862         if (U_flag) {
2863                 int set_csum = 0;
2864                 dgrp_t i;
2865                 char buf[SUPERBLOCK_SIZE];
2866                 __u8 old_uuid[UUID_SIZE];
2867
2868                 if (ext2fs_has_group_desc_csum(fs)) {
2869                         /*
2870                          * Changing the UUID requires rewriting all metadata,
2871                          * which can race with a mounted fs.  Don't allow that.
2872                          */
2873                         if (mount_flags & EXT2_MF_MOUNTED) {
2874                                 fputs(_("The UUID may only be "
2875                                         "changed when the filesystem is "
2876                                         "unmounted.\n"), stderr);
2877                                 exit(1);
2878                         }
2879                         if (check_fsck_needed(fs))
2880                                 exit(1);
2881
2882                         /*
2883                          * Determine if the block group checksums are
2884                          * correct so we know whether or not to set
2885                          * them later on.
2886                          */
2887                         for (i = 0; i < fs->group_desc_count; i++)
2888                                 if (!ext2fs_group_desc_csum_verify(fs, i))
2889                                         break;
2890                         if (i >= fs->group_desc_count)
2891                                 set_csum = 1;
2892                 }
2893
2894                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
2895                 if ((strcasecmp(new_UUID, "null") == 0) ||
2896                     (strcasecmp(new_UUID, "clear") == 0)) {
2897                         uuid_clear(sb->s_uuid);
2898                 } else if (strcasecmp(new_UUID, "time") == 0) {
2899                         uuid_generate_time(sb->s_uuid);
2900                 } else if (strcasecmp(new_UUID, "random") == 0) {
2901                         uuid_generate(sb->s_uuid);
2902                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
2903                         com_err(program_name, 0, "%s",
2904                                 _("Invalid UUID format\n"));
2905                         rc = 1;
2906                         goto closefs;
2907                 }
2908                 ext2fs_init_csum_seed(fs);
2909                 if (set_csum) {
2910                         for (i = 0; i < fs->group_desc_count; i++)
2911                                 ext2fs_group_desc_csum_set(fs, i);
2912                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2913                 }
2914
2915                 /* If this is a journal dev, we need to copy UUID into jsb */
2916                 if (!(rc = get_journal_sb(fs, buf))) {
2917                         journal_superblock_t *jsb;
2918
2919                         jsb = (journal_superblock_t *) buf;
2920                         fputs(_("Need to update journal superblock.\n"), stdout);
2921                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
2922
2923                         /* Writeback the journal superblock */
2924                         if ((rc = io_channel_write_blk64(fs->io,
2925                                 ext2fs_journal_sb_start(fs->blocksize),
2926                                         -SUPERBLOCK_SIZE, buf)))
2927                                 goto closefs;
2928                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
2929                         goto closefs;
2930                 else {
2931                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
2932
2933                         if ((rc = fs_update_journal_user(sb, old_uuid)))
2934                                 goto closefs;
2935                 }
2936
2937                 ext2fs_mark_super_dirty(fs);
2938                 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
2939                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
2940                         rewrite_checksums = 1;
2941         }
2942
2943         if (I_flag) {
2944                 if (mount_flags & EXT2_MF_MOUNTED) {
2945                         fputs(_("The inode size may only be "
2946                                 "changed when the filesystem is "
2947                                 "unmounted.\n"), stderr);
2948                         rc = 1;
2949                         goto closefs;
2950                 }
2951                 if (fs->super->s_feature_incompat &
2952                     EXT4_FEATURE_INCOMPAT_FLEX_BG) {
2953                         fputs(_("Changing the inode size not supported for "
2954                                 "filesystems with the flex_bg\n"
2955                                 "feature enabled.\n"),
2956                               stderr);
2957                         rc = 1;
2958                         goto closefs;
2959                 }
2960                 /*
2961                  * We want to update group descriptor also
2962                  * with the new free inode count
2963                  */
2964                 if (rewrite_checksums)
2965                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
2966                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2967                 retval = resize_inode(fs, new_inode_size);
2968                 if (rewrite_checksums)
2969                         fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
2970                 if (retval == 0) {
2971                         printf(_("Setting inode size %lu\n"),
2972                                                         new_inode_size);
2973                         rewrite_checksums = 1;
2974                 } else {
2975                         printf("%s", _("Failed to change inode size\n"));
2976                         rc = 1;
2977                         goto closefs;
2978                 }
2979         }
2980
2981         if (rewrite_checksums)
2982                 rewrite_metadata_checksums(fs);
2983
2984         if (l_flag)
2985                 list_super(sb);
2986         if (stride_set) {
2987                 sb->s_raid_stride = stride;
2988                 ext2fs_mark_super_dirty(fs);
2989                 printf(_("Setting stride size to %d\n"), stride);
2990         }
2991         if (stripe_width_set) {
2992                 sb->s_raid_stripe_width = stripe_width;
2993                 ext2fs_mark_super_dirty(fs);
2994                 printf(_("Setting stripe width to %d\n"), stripe_width);
2995         }
2996         if (ext_mount_opts) {
2997                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
2998                         sizeof(fs->super->s_mount_opts));
2999                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
3000                 ext2fs_mark_super_dirty(fs);
3001                 printf(_("Setting extended default mount options to '%s'\n"),
3002                        ext_mount_opts);
3003                 free(ext_mount_opts);
3004         }
3005         free(device_name);
3006         remove_error_table(&et_ext2_error_table);
3007
3008 closefs:
3009         if (rc) {
3010                 ext2fs_mmp_stop(fs);
3011                 exit(1);
3012         }
3013
3014         return (ext2fs_close_free(&fs) ? 1 : 0);
3015 }