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                 rewrite_checksums = 1;
1125                 /* metadata_csum supersedes uninit_bg */
1126                 fs->super->s_feature_ro_compat &=
1127                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1128
1129                 /* if uninit_bg was previously off, rewrite group desc */
1130                 if (!(old_features[E2P_FEATURE_RO_INCOMPAT] &
1131                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
1132                         enable_uninit_bg(fs);
1133
1134                 /*
1135                  * Since metadata_csum supersedes uninit_bg, pretend like
1136                  * uninit_bg has been off all along.
1137                  */
1138                 old_features[E2P_FEATURE_RO_INCOMPAT] &=
1139                         ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1140         }
1141
1142         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1143                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
1144                 __u32   test_features[3];
1145
1146                 if (check_fsck_needed(fs))
1147                         exit(1);
1148                 if (mount_flags & EXT2_MF_MOUNTED)
1149                         fputs(_("Cannot disable metadata_csum on a mounted "
1150                                 "filesystem!\n"), stderr);
1151                 rewrite_checksums = 1;
1152
1153                 /* Enable uninit_bg unless the user expressly turned it off */
1154                 memcpy(test_features, old_features, sizeof(test_features));
1155                 test_features[E2P_FEATURE_RO_INCOMPAT] |=
1156                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1157                 e2p_edit_feature2(features, test_features, ok_features,
1158                                   clear_ok_features, NULL, NULL);
1159                 if (test_features[E2P_FEATURE_RO_INCOMPAT] &
1160                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
1161                         fs->super->s_feature_ro_compat |=
1162                                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1163
1164                 /*
1165                  * If we're turning off metadata_csum and not turning on
1166                  * uninit_bg, rewrite group desc.
1167                  */
1168                 if (!(fs->super->s_feature_ro_compat &
1169                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1170                         err = disable_uninit_bg(fs,
1171                                         EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
1172                         if (err)
1173                                 return 1;
1174                 } else
1175                         /*
1176                          * metadata_csum previously provided uninit_bg, so if
1177                          * we're also setting the uninit_bg feature bit,
1178                          * pretend like it was previously enabled.  Checksums
1179                          * will be rewritten with crc16 later.
1180                          */
1181                         old_features[E2P_FEATURE_RO_INCOMPAT] |=
1182                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1183         }
1184
1185         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1186                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1187                 /* Do not enable uninit_bg when metadata_csum enabled */
1188                 if (fs->super->s_feature_ro_compat &
1189                     EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
1190                         fs->super->s_feature_ro_compat &=
1191                                 ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
1192                 else
1193                         enable_uninit_bg(fs);
1194         }
1195
1196         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1197                         EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
1198                 err = disable_uninit_bg(fs,
1199                                 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
1200                 if (err)
1201                         return 1;
1202         }
1203
1204         if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
1205                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1206                 /*
1207                  * Set the Q_flag here and handle the quota options in the code
1208                  * below.
1209                  */
1210                 if (!Q_flag) {
1211                         Q_flag = 1;
1212                         /* Enable both user quota and group quota by default */
1213                         usrquota = QOPT_ENABLE;
1214                         grpquota = QOPT_ENABLE;
1215                 }
1216                 sb->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1217         }
1218
1219         if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1220                                 EXT4_FEATURE_RO_COMPAT_QUOTA)) {
1221                 /*
1222                  * Set the Q_flag here and handle the quota options in the code
1223                  * below.
1224                  */
1225                 if (Q_flag)
1226                         fputs(_("\nWarning: '^quota' option overrides '-Q'"
1227                                 "arguments.\n"), stderr);
1228                 Q_flag = 1;
1229                 /* Disable both user quota and group quota by default */
1230                 usrquota = QOPT_DISABLE;
1231                 grpquota = QOPT_DISABLE;
1232         }
1233
1234         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
1235             (sb->s_feature_compat || sb->s_feature_ro_compat ||
1236              sb->s_feature_incompat))
1237                 ext2fs_update_dynamic_rev(fs);
1238
1239         if (FEATURE_CHANGED(E2P_FEATURE_RO_INCOMPAT,
1240                             EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) ||
1241             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1242                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
1243             FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
1244                             EXT2_FEATURE_INCOMPAT_FILETYPE) ||
1245             FEATURE_CHANGED(E2P_FEATURE_COMPAT,
1246                             EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
1247             FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
1248                         EXT2_FEATURE_RO_COMPAT_LARGE_FILE))
1249                 request_fsck_afterwards(fs);
1250
1251         if ((old_features[E2P_FEATURE_COMPAT] != sb->s_feature_compat) ||
1252             (old_features[E2P_FEATURE_INCOMPAT] != sb->s_feature_incompat) ||
1253             (old_features[E2P_FEATURE_RO_INCOMPAT] != sb->s_feature_ro_compat))
1254                 ext2fs_mark_super_dirty(fs);
1255
1256         return 0;
1257 }
1258
1259 /*
1260  * Add a journal to the filesystem.
1261  */
1262 static int add_journal(ext2_filsys fs)
1263 {
1264         unsigned long journal_blocks;
1265         errcode_t       retval;
1266         ext2_filsys     jfs;
1267         io_manager      io_ptr;
1268
1269         if (fs->super->s_feature_compat &
1270             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
1271                 fputs(_("The filesystem already has a journal.\n"), stderr);
1272                 goto err;
1273         }
1274         if (journal_device) {
1275                 if (!check_plausibility(journal_device, CHECK_BLOCK_DEV,
1276                                         NULL))
1277                         proceed_question(-1);
1278                 check_mount(journal_device, 0, _("journal"));
1279 #ifdef CONFIG_TESTIO_DEBUG
1280                 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1281                         io_ptr = test_io_manager;
1282                         test_io_backing_manager = unix_io_manager;
1283                 } else
1284 #endif
1285                         io_ptr = unix_io_manager;
1286                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1287                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1288                                      fs->blocksize, io_ptr, &jfs);
1289                 if (retval) {
1290                         com_err(program_name, retval,
1291                                 _("\n\twhile trying to open journal on %s\n"),
1292                                 journal_device);
1293                         goto err;
1294                 }
1295                 printf(_("Creating journal on device %s: "),
1296                        journal_device);
1297                 fflush(stdout);
1298
1299                 retval = ext2fs_add_journal_device(fs, jfs);
1300                 ext2fs_close_free(&jfs);
1301                 if (retval) {
1302                         com_err(program_name, retval,
1303                                 _("while adding filesystem to journal on %s"),
1304                                 journal_device);
1305                         goto err;
1306                 }
1307                 fputs(_("done\n"), stdout);
1308         } else if (journal_size) {
1309                 fputs(_("Creating journal inode: "), stdout);
1310                 fflush(stdout);
1311                 journal_blocks = figure_journal_size(journal_size, fs);
1312
1313                 if (journal_location_string)
1314                         journal_location =
1315                                 parse_num_blocks2(journal_location_string,
1316                                                   fs->super->s_log_block_size);
1317                 retval = ext2fs_add_journal_inode2(fs, journal_blocks,
1318                                                    journal_location,
1319                                                    journal_flags);
1320                 if (retval) {
1321                         fprintf(stderr, "\n");
1322                         com_err(program_name, retval, "%s",
1323                                 _("\n\twhile trying to create journal file"));
1324                         return retval;
1325                 } else
1326                         fputs(_("done\n"), stdout);
1327                 /*
1328                  * If the filesystem wasn't mounted, we need to force
1329                  * the block group descriptors out.
1330                  */
1331                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
1332                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
1333         }
1334         print_check_message(fs->super->s_max_mnt_count,
1335                             fs->super->s_checkinterval);
1336         return 0;
1337
1338 err:
1339         free(journal_device);
1340         return 1;
1341 }
1342
1343 static void handle_quota_options(ext2_filsys fs)
1344 {
1345         quota_ctx_t qctx;
1346         ext2_ino_t qf_ino;
1347
1348         if (!usrquota && !grpquota)
1349                 /* Nothing to do. */
1350                 return;
1351
1352         quota_init_context(&qctx, fs, -1);
1353
1354         if (usrquota == QOPT_ENABLE || grpquota == QOPT_ENABLE)
1355                 quota_compute_usage(qctx);
1356
1357         if (usrquota == QOPT_ENABLE && !fs->super->s_usr_quota_inum) {
1358                 if ((qf_ino = quota_file_exists(fs, USRQUOTA,
1359                                                 QFMT_VFS_V1)) > 0)
1360                         quota_update_limits(qctx, qf_ino, USRQUOTA);
1361                 quota_write_inode(qctx, USRQUOTA);
1362         } else if (usrquota == QOPT_DISABLE) {
1363                 quota_remove_inode(fs, USRQUOTA);
1364         }
1365
1366         if (grpquota == QOPT_ENABLE && !fs->super->s_grp_quota_inum) {
1367                 if ((qf_ino = quota_file_exists(fs, GRPQUOTA,
1368                                                 QFMT_VFS_V1)) > 0)
1369                         quota_update_limits(qctx, qf_ino, GRPQUOTA);
1370                 quota_write_inode(qctx, GRPQUOTA);
1371         } else if (grpquota == QOPT_DISABLE) {
1372                 quota_remove_inode(fs, GRPQUOTA);
1373         }
1374
1375         quota_release_context(&qctx);
1376
1377         if ((usrquota == QOPT_ENABLE) || (grpquota == QOPT_ENABLE)) {
1378                 fs->super->s_feature_ro_compat |= EXT4_FEATURE_RO_COMPAT_QUOTA;
1379                 ext2fs_mark_super_dirty(fs);
1380         } else if (!fs->super->s_usr_quota_inum &&
1381                    !fs->super->s_grp_quota_inum) {
1382                 fs->super->s_feature_ro_compat &= ~EXT4_FEATURE_RO_COMPAT_QUOTA;
1383                 ext2fs_mark_super_dirty(fs);
1384         }
1385
1386         return;
1387 }
1388
1389 #ifdef CONFIG_QUOTA
1390 static void parse_quota_opts(const char *opts)
1391 {
1392         char    *buf, *token, *next, *p;
1393         int     len;
1394
1395         len = strlen(opts);
1396         buf = malloc(len+1);
1397         if (!buf) {
1398                 fputs(_("Couldn't allocate memory to parse quota "
1399                         "options!\n"), stderr);
1400                 exit(1);
1401         }
1402         strcpy(buf, opts);
1403         for (token = buf; token && *token; token = next) {
1404                 p = strchr(token, ',');
1405                 next = 0;
1406                 if (p) {
1407                         *p = 0;
1408                         next = p+1;
1409                 }
1410
1411                 if (strcmp(token, "usrquota") == 0) {
1412                         usrquota = QOPT_ENABLE;
1413                 } else if (strcmp(token, "^usrquota") == 0) {
1414                         usrquota = QOPT_DISABLE;
1415                 } else if (strcmp(token, "grpquota") == 0) {
1416                         grpquota = QOPT_ENABLE;
1417                 } else if (strcmp(token, "^grpquota") == 0) {
1418                         grpquota = QOPT_DISABLE;
1419                 } else {
1420                         fputs(_("\nBad quota options specified.\n\n"
1421                                 "Following valid quota options are available "
1422                                 "(pass by separating with comma):\n"
1423                                 "\t[^]usrquota\n"
1424                                 "\t[^]grpquota\n"
1425                                 "\n\n"), stderr);
1426                         free(buf);
1427                         exit(1);
1428                 }
1429         }
1430         free(buf);
1431 }
1432 #endif
1433
1434 static void parse_e2label_options(int argc, char ** argv)
1435 {
1436         if ((argc < 2) || (argc > 3)) {
1437                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
1438                 exit(1);
1439         }
1440         io_options = strchr(argv[1], '?');
1441         if (io_options)
1442                 *io_options++ = 0;
1443         device_name = blkid_get_devname(NULL, argv[1], NULL);
1444         if (!device_name) {
1445                 com_err("e2label", 0, _("Unable to resolve '%s'"),
1446                         argv[1]);
1447                 exit(1);
1448         }
1449         open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
1450         if (argc == 3) {
1451                 open_flag |= EXT2_FLAG_RW;
1452                 L_flag = 1;
1453                 new_label = argv[2];
1454         } else
1455                 print_label++;
1456 }
1457
1458 static time_t parse_time(char *str)
1459 {
1460         struct  tm      ts;
1461
1462         if (strcmp(str, "now") == 0) {
1463                 return (time(0));
1464         }
1465         memset(&ts, 0, sizeof(ts));
1466 #ifdef HAVE_STRPTIME
1467         strptime(str, "%Y%m%d%H%M%S", &ts);
1468 #else
1469         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
1470                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
1471         ts.tm_year -= 1900;
1472         ts.tm_mon -= 1;
1473         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
1474             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
1475             ts.tm_min > 59 || ts.tm_sec > 61)
1476                 ts.tm_mday = 0;
1477 #endif
1478         if (ts.tm_mday == 0) {
1479                 com_err(program_name, 0,
1480                         _("Couldn't parse date/time specifier: %s"),
1481                         str);
1482                 usage();
1483         }
1484         ts.tm_isdst = -1;
1485         return (mktime(&ts));
1486 }
1487
1488 static void parse_tune2fs_options(int argc, char **argv)
1489 {
1490         int c;
1491         char *tmp;
1492         struct group *gr;
1493         struct passwd *pw;
1494         char optstring[100] = "c:e:fg:i:jlm:o:r:s:u:C:E:I:J:L:M:O:T:U:";
1495
1496 #ifdef CONFIG_QUOTA
1497         strcat(optstring, "Q:");
1498 #endif
1499         open_flag = 0;
1500
1501         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1502         while ((c = getopt(argc, argv, optstring)) != EOF)
1503                 switch (c) {
1504                 case 'c':
1505                         max_mount_count = strtol(optarg, &tmp, 0);
1506                         if (*tmp || max_mount_count > 16000) {
1507                                 com_err(program_name, 0,
1508                                         _("bad mounts count - %s"),
1509                                         optarg);
1510                                 usage();
1511                         }
1512                         if (max_mount_count == 0)
1513                                 max_mount_count = -1;
1514                         c_flag = 1;
1515                         open_flag = EXT2_FLAG_RW;
1516                         break;
1517                 case 'C':
1518                         mount_count = strtoul(optarg, &tmp, 0);
1519                         if (*tmp || mount_count > 16000) {
1520                                 com_err(program_name, 0,
1521                                         _("bad mounts count - %s"),
1522                                         optarg);
1523                                 usage();
1524                         }
1525                         C_flag = 1;
1526                         open_flag = EXT2_FLAG_RW;
1527                         break;
1528                 case 'e':
1529                         if (strcmp(optarg, "continue") == 0)
1530                                 errors = EXT2_ERRORS_CONTINUE;
1531                         else if (strcmp(optarg, "remount-ro") == 0)
1532                                 errors = EXT2_ERRORS_RO;
1533                         else if (strcmp(optarg, "panic") == 0)
1534                                 errors = EXT2_ERRORS_PANIC;
1535                         else {
1536                                 com_err(program_name, 0,
1537                                         _("bad error behavior - %s"),
1538                                         optarg);
1539                                 usage();
1540                         }
1541                         e_flag = 1;
1542                         open_flag = EXT2_FLAG_RW;
1543                         break;
1544                 case 'E':
1545                         extended_cmd = optarg;
1546                         open_flag |= EXT2_FLAG_RW;
1547                         break;
1548                 case 'f': /* Force */
1549                         f_flag++;
1550                         break;
1551                 case 'g':
1552                         resgid = strtoul(optarg, &tmp, 0);
1553                         if (*tmp) {
1554                                 gr = getgrnam(optarg);
1555                                 if (gr == NULL)
1556                                         tmp = optarg;
1557                                 else {
1558                                         resgid = gr->gr_gid;
1559                                         *tmp = 0;
1560                                 }
1561                         }
1562                         if (*tmp) {
1563                                 com_err(program_name, 0,
1564                                         _("bad gid/group name - %s"),
1565                                         optarg);
1566                                 usage();
1567                         }
1568                         g_flag = 1;
1569                         open_flag = EXT2_FLAG_RW;
1570                         break;
1571                 case 'i':
1572                         interval = strtoul(optarg, &tmp, 0);
1573                         switch (*tmp) {
1574                         case 's':
1575                                 tmp++;
1576                                 break;
1577                         case '\0':
1578                         case 'd':
1579                         case 'D': /* days */
1580                                 interval *= 86400;
1581                                 if (*tmp != '\0')
1582                                         tmp++;
1583                                 break;
1584                         case 'm':
1585                         case 'M': /* months! */
1586                                 interval *= 86400 * 30;
1587                                 tmp++;
1588                                 break;
1589                         case 'w':
1590                         case 'W': /* weeks */
1591                                 interval *= 86400 * 7;
1592                                 tmp++;
1593                                 break;
1594                         }
1595                         if (*tmp) {
1596                                 com_err(program_name, 0,
1597                                         _("bad interval - %s"), optarg);
1598                                 usage();
1599                         }
1600                         i_flag = 1;
1601                         open_flag = EXT2_FLAG_RW;
1602                         break;
1603                 case 'j':
1604                         if (!journal_size)
1605                                 journal_size = -1;
1606                         open_flag = EXT2_FLAG_RW;
1607                         break;
1608                 case 'J':
1609                         parse_journal_opts(optarg);
1610                         open_flag = EXT2_FLAG_RW;
1611                         break;
1612                 case 'l':
1613                         l_flag = 1;
1614                         break;
1615                 case 'L':
1616                         new_label = optarg;
1617                         L_flag = 1;
1618                         open_flag |= EXT2_FLAG_RW |
1619                                 EXT2_FLAG_JOURNAL_DEV_OK;
1620                         break;
1621                 case 'm':
1622                         reserved_ratio = strtod(optarg, &tmp);
1623                         if (*tmp || reserved_ratio > 50 ||
1624                             reserved_ratio < 0) {
1625                                 com_err(program_name, 0,
1626                                         _("bad reserved block ratio - %s"),
1627                                         optarg);
1628                                 usage();
1629                         }
1630                         m_flag = 1;
1631                         open_flag = EXT2_FLAG_RW;
1632                         break;
1633                 case 'M':
1634                         new_last_mounted = optarg;
1635                         M_flag = 1;
1636                         open_flag = EXT2_FLAG_RW;
1637                         break;
1638                 case 'o':
1639                         if (mntopts_cmd) {
1640                                 com_err(program_name, 0, "%s",
1641                                         _("-o may only be specified once"));
1642                                 usage();
1643                         }
1644                         mntopts_cmd = optarg;
1645                         open_flag = EXT2_FLAG_RW;
1646                         break;
1647                 case 'O':
1648                         if (features_cmd) {
1649                                 com_err(program_name, 0, "%s",
1650                                         _("-O may only be specified once"));
1651                                 usage();
1652                         }
1653                         features_cmd = optarg;
1654                         open_flag = EXT2_FLAG_RW;
1655                         break;
1656 #ifdef CONFIG_QUOTA
1657                 case 'Q':
1658                         Q_flag = 1;
1659                         parse_quota_opts(optarg);
1660                         open_flag = EXT2_FLAG_RW;
1661                         break;
1662 #endif
1663                 case 'r':
1664                         reserved_blocks = strtoul(optarg, &tmp, 0);
1665                         if (*tmp) {
1666                                 com_err(program_name, 0,
1667                                         _("bad reserved blocks count - %s"),
1668                                         optarg);
1669                                 usage();
1670                         }
1671                         r_flag = 1;
1672                         open_flag = EXT2_FLAG_RW;
1673                         break;
1674                 case 's': /* Deprecated */
1675                         s_flag = atoi(optarg);
1676                         open_flag = EXT2_FLAG_RW;
1677                         break;
1678                 case 'T':
1679                         T_flag = 1;
1680                         last_check_time = parse_time(optarg);
1681                         open_flag = EXT2_FLAG_RW;
1682                         break;
1683                 case 'u':
1684                                 resuid = strtoul(optarg, &tmp, 0);
1685                                 if (*tmp) {
1686                                         pw = getpwnam(optarg);
1687                                         if (pw == NULL)
1688                                                 tmp = optarg;
1689                                         else {
1690                                                 resuid = pw->pw_uid;
1691                                                 *tmp = 0;
1692                                         }
1693                                 }
1694                                 if (*tmp) {
1695                                         com_err(program_name, 0,
1696                                                 _("bad uid/user name - %s"),
1697                                                 optarg);
1698                                         usage();
1699                                 }
1700                                 u_flag = 1;
1701                                 open_flag = EXT2_FLAG_RW;
1702                                 break;
1703                 case 'U':
1704                         new_UUID = optarg;
1705                         U_flag = 1;
1706                         open_flag = EXT2_FLAG_RW |
1707                                 EXT2_FLAG_JOURNAL_DEV_OK;
1708                         break;
1709                 case 'I':
1710                         new_inode_size = strtoul(optarg, &tmp, 0);
1711                         if (*tmp) {
1712                                 com_err(program_name, 0,
1713                                         _("bad inode size - %s"),
1714                                         optarg);
1715                                 usage();
1716                         }
1717                         if (!((new_inode_size &
1718                                (new_inode_size - 1)) == 0)) {
1719                                 com_err(program_name, 0,
1720                                         _("Inode size must be a "
1721                                           "power of two- %s"),
1722                                         optarg);
1723                                 usage();
1724                         }
1725                         open_flag = EXT2_FLAG_RW;
1726                         I_flag = 1;
1727                         break;
1728                 default:
1729                         usage();
1730                 }
1731         if (optind < argc - 1 || optind == argc)
1732                 usage();
1733         if (!open_flag && !l_flag)
1734                 usage();
1735         io_options = strchr(argv[optind], '?');
1736         if (io_options)
1737                 *io_options++ = 0;
1738         device_name = blkid_get_devname(NULL, argv[optind], NULL);
1739         if (!device_name) {
1740                 com_err(program_name, 0, _("Unable to resolve '%s'"),
1741                         argv[optind]);
1742                 exit(1);
1743         }
1744 }
1745
1746 #ifdef CONFIG_BUILD_FINDFS
1747 void do_findfs(int argc, char **argv)
1748 {
1749         char    *dev;
1750
1751         if ((argc != 2) ||
1752             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
1753                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
1754                 exit(2);
1755         }
1756         dev = blkid_get_devname(NULL, argv[1], NULL);
1757         if (!dev) {
1758                 com_err("findfs", 0, _("Unable to resolve '%s'"),
1759                         argv[1]);
1760                 exit(1);
1761         }
1762         puts(dev);
1763         exit(0);
1764 }
1765 #endif
1766
1767 static int parse_extended_opts(ext2_filsys fs, const char *opts)
1768 {
1769         char    *buf, *token, *next, *p, *arg;
1770         int     len, hash_alg;
1771         int     r_usage = 0;
1772
1773         len = strlen(opts);
1774         buf = malloc(len+1);
1775         if (!buf) {
1776                 fprintf(stderr, "%s",
1777                         _("Couldn't allocate memory to parse options!\n"));
1778                 return 1;
1779         }
1780         strcpy(buf, opts);
1781         for (token = buf; token && *token; token = next) {
1782                 p = strchr(token, ',');
1783                 next = 0;
1784                 if (p) {
1785                         *p = 0;
1786                         next = p+1;
1787                 }
1788                 arg = strchr(token, '=');
1789                 if (arg) {
1790                         *arg = 0;
1791                         arg++;
1792                 }
1793                 if (strcmp(token, "clear-mmp") == 0 ||
1794                     strcmp(token, "clear_mmp") == 0) {
1795                         clear_mmp = 1;
1796                 } else if (strcmp(token, "mmp_update_interval") == 0) {
1797                         unsigned long intv;
1798                         if (!arg) {
1799                                 r_usage++;
1800                                 continue;
1801                         }
1802                         intv = strtoul(arg, &p, 0);
1803                         if (*p) {
1804                                 fprintf(stderr,
1805                                         _("Invalid mmp_update_interval: %s\n"),
1806                                         arg);
1807                                 r_usage++;
1808                                 continue;
1809                         }
1810                         if (intv == 0) {
1811                                 intv = EXT4_MMP_UPDATE_INTERVAL;
1812                         } else if (intv > EXT4_MMP_MAX_UPDATE_INTERVAL) {
1813                                 fprintf(stderr,
1814                                         _("mmp_update_interval too big: %lu\n"),
1815                                         intv);
1816                                 r_usage++;
1817                                 continue;
1818                         }
1819                         printf(P_("Setting multiple mount protection update "
1820                                   "interval to %lu second\n",
1821                                   "Setting multiple mount protection update "
1822                                   "interval to %lu seconds\n", intv),
1823                                intv);
1824                         fs->super->s_mmp_update_interval = intv;
1825                         ext2fs_mark_super_dirty(fs);
1826                 } else if (!strcmp(token, "test_fs")) {
1827                         fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
1828                         printf("Setting test filesystem flag\n");
1829                         ext2fs_mark_super_dirty(fs);
1830                 } else if (!strcmp(token, "^test_fs")) {
1831                         fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
1832                         printf("Clearing test filesystem flag\n");
1833                         ext2fs_mark_super_dirty(fs);
1834                 } else if (strcmp(token, "stride") == 0) {
1835                         if (!arg) {
1836                                 r_usage++;
1837                                 continue;
1838                         }
1839                         stride = strtoul(arg, &p, 0);
1840                         if (*p) {
1841                                 fprintf(stderr,
1842                                         _("Invalid RAID stride: %s\n"),
1843                                         arg);
1844                                 r_usage++;
1845                                 continue;
1846                         }
1847                         stride_set = 1;
1848                 } else if (strcmp(token, "stripe-width") == 0 ||
1849                            strcmp(token, "stripe_width") == 0) {
1850                         if (!arg) {
1851                                 r_usage++;
1852                                 continue;
1853                         }
1854                         stripe_width = strtoul(arg, &p, 0);
1855                         if (*p) {
1856                                 fprintf(stderr,
1857                                         _("Invalid RAID stripe-width: %s\n"),
1858                                         arg);
1859                                 r_usage++;
1860                                 continue;
1861                         }
1862                         stripe_width_set = 1;
1863                 } else if (strcmp(token, "hash_alg") == 0 ||
1864                            strcmp(token, "hash-alg") == 0) {
1865                         if (!arg) {
1866                                 r_usage++;
1867                                 continue;
1868                         }
1869                         hash_alg = e2p_string2hash(arg);
1870                         if (hash_alg < 0) {
1871                                 fprintf(stderr,
1872                                         _("Invalid hash algorithm: %s\n"),
1873                                         arg);
1874                                 r_usage++;
1875                                 continue;
1876                         }
1877                         fs->super->s_def_hash_version = hash_alg;
1878                         printf(_("Setting default hash algorithm "
1879                                  "to %s (%d)\n"),
1880                                arg, hash_alg);
1881                         ext2fs_mark_super_dirty(fs);
1882                 } else if (!strcmp(token, "mount_opts")) {
1883                         if (!arg) {
1884                                 r_usage++;
1885                                 continue;
1886                         }
1887                         if (strlen(arg) >= sizeof(fs->super->s_mount_opts)) {
1888                                 fprintf(stderr,
1889                                         "Extended mount options too long\n");
1890                                 continue;
1891                         }
1892                         ext_mount_opts = strdup(arg);
1893                 } else
1894                         r_usage++;
1895         }
1896         if (r_usage) {
1897                 fprintf(stderr, "%s", _("\nBad options specified.\n\n"
1898                         "Extended options are separated by commas, "
1899                         "and may take an argument which\n"
1900                         "\tis set off by an equals ('=') sign.\n\n"
1901                         "Valid extended options are:\n"
1902                         "\tclear_mmp\n"
1903                         "\thash_alg=<hash algorithm>\n"
1904                         "\tmount_opts=<extended default mount options>\n"
1905                         "\tstride=<RAID per-disk chunk size in blocks>\n"
1906                         "\tstripe_width=<RAID stride*data disks in blocks>\n"
1907                         "\ttest_fs\n"
1908                         "\t^test_fs\n"));
1909                 free(buf);
1910                 return 1;
1911         }
1912         free(buf);
1913
1914         return 0;
1915 }
1916
1917 /*
1918  * Fill in the block bitmap bmap with the information regarding the
1919  * blocks to be moved
1920  */
1921 static int get_move_bitmaps(ext2_filsys fs, int new_ino_blks_per_grp,
1922                             ext2fs_block_bitmap bmap)
1923 {
1924         dgrp_t i;
1925         int retval;
1926         ext2_badblocks_list bb_list = 0;
1927         blk64_t j, needed_blocks = 0;
1928         blk64_t start_blk, end_blk;
1929
1930         retval = ext2fs_read_bb_inode(fs, &bb_list);
1931         if (retval)
1932                 return retval;
1933
1934         for (i = 0; i < fs->group_desc_count; i++) {
1935                 start_blk = ext2fs_inode_table_loc(fs, i) +
1936                                         fs->inode_blocks_per_group;
1937
1938                 end_blk = ext2fs_inode_table_loc(fs, i) +
1939                                         new_ino_blks_per_grp;
1940
1941                 for (j = start_blk; j < end_blk; j++) {
1942                         if (ext2fs_test_block_bitmap2(fs->block_map, j)) {
1943                                 /*
1944                                  * IF the block is a bad block we fail
1945                                  */
1946                                 if (ext2fs_badblocks_list_test(bb_list, j)) {
1947                                         ext2fs_badblocks_list_free(bb_list);
1948                                         return ENOSPC;
1949                                 }
1950
1951                                 ext2fs_mark_block_bitmap2(bmap, j);
1952                         } else {
1953                                 /*
1954                                  * We are going to use this block for
1955                                  * inode table. So mark them used.
1956                                  */
1957                                 ext2fs_mark_block_bitmap2(fs->block_map, j);
1958                         }
1959                 }
1960                 needed_blocks += end_blk - start_blk;
1961         }
1962
1963         ext2fs_badblocks_list_free(bb_list);
1964         if (needed_blocks > ext2fs_free_blocks_count(fs->super))
1965                 return ENOSPC;
1966
1967         return 0;
1968 }
1969
1970 static int ext2fs_is_meta_block(ext2_filsys fs, blk64_t blk)
1971 {
1972         dgrp_t group;
1973         group = ext2fs_group_of_blk2(fs, blk);
1974         if (ext2fs_block_bitmap_loc(fs, group) == blk)
1975                 return 1;
1976         if (ext2fs_inode_bitmap_loc(fs, group) == blk)
1977                 return 1;
1978         return 0;
1979 }
1980
1981 static int ext2fs_is_block_in_group(ext2_filsys fs, dgrp_t group, blk64_t blk)
1982 {
1983         blk64_t start_blk, end_blk;
1984         start_blk = fs->super->s_first_data_block +
1985                         EXT2_GROUPS_TO_BLOCKS(fs->super, group);
1986         /*
1987          * We cannot get new block beyond end_blk for for the last block group
1988          * so we can check with EXT2_BLOCKS_PER_GROUP even for last block group
1989          */
1990         end_blk   = start_blk + EXT2_BLOCKS_PER_GROUP(fs->super);
1991         if (blk >= start_blk && blk <= end_blk)
1992                 return 1;
1993         return 0;
1994 }
1995
1996 static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
1997 {
1998
1999         char *buf;
2000         dgrp_t group = 0;
2001         errcode_t retval;
2002         int meta_data = 0;
2003         blk64_t blk, new_blk, goal;
2004         struct blk_move *bmv;
2005
2006         retval = ext2fs_get_mem(fs->blocksize, &buf);
2007         if (retval)
2008                 return retval;
2009
2010         for (new_blk = blk = fs->super->s_first_data_block;
2011              blk < ext2fs_blocks_count(fs->super); blk++) {
2012                 if (!ext2fs_test_block_bitmap2(bmap, blk))
2013                         continue;
2014
2015                 if (ext2fs_is_meta_block(fs, blk)) {
2016                         /*
2017                          * If the block is mapping a fs meta data block
2018                          * like group desc/block bitmap/inode bitmap. We
2019                          * should find a block in the same group and fix
2020                          * the respective fs metadata pointers. Otherwise
2021                          * fail
2022                          */
2023                         group = ext2fs_group_of_blk2(fs, blk);
2024                         goal = ext2fs_group_first_block2(fs, group);
2025                         meta_data = 1;
2026
2027                 } else {
2028                         goal = new_blk;
2029                 }
2030                 retval = ext2fs_new_block2(fs, goal, NULL, &new_blk);
2031                 if (retval)
2032                         goto err_out;
2033
2034                 /* new fs meta data block should be in the same group */
2035                 if (meta_data && !ext2fs_is_block_in_group(fs, group, new_blk)) {
2036                         retval = ENOSPC;
2037                         goto err_out;
2038                 }
2039
2040                 /* Mark this block as allocated */
2041                 ext2fs_mark_block_bitmap2(fs->block_map, new_blk);
2042
2043                 /* Add it to block move list */
2044                 retval = ext2fs_get_mem(sizeof(struct blk_move), &bmv);
2045                 if (retval)
2046                         goto err_out;
2047
2048                 bmv->old_loc = blk;
2049                 bmv->new_loc = new_blk;
2050
2051                 list_add(&(bmv->list), &blk_move_list);
2052
2053                 retval = io_channel_read_blk64(fs->io, blk, 1, buf);
2054                 if (retval)
2055                         goto err_out;
2056
2057                 retval = io_channel_write_blk64(fs->io, new_blk, 1, buf);
2058                 if (retval)
2059                         goto err_out;
2060         }
2061
2062 err_out:
2063         ext2fs_free_mem(&buf);
2064         return retval;
2065 }
2066
2067 static blk64_t translate_block(blk64_t blk)
2068 {
2069         struct list_head *entry;
2070         struct blk_move *bmv;
2071
2072         list_for_each(entry, &blk_move_list) {
2073                 bmv = list_entry(entry, struct blk_move, list);
2074                 if (bmv->old_loc == blk)
2075                         return bmv->new_loc;
2076         }
2077
2078         return 0;
2079 }
2080
2081 static int process_block(ext2_filsys fs EXT2FS_ATTR((unused)),
2082                          blk64_t *block_nr,
2083                          e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
2084                          blk64_t ref_block EXT2FS_ATTR((unused)),
2085                          int ref_offset EXT2FS_ATTR((unused)),
2086                          void *priv_data)
2087 {
2088         int ret = 0;
2089         blk64_t new_blk;
2090         ext2fs_block_bitmap bmap = (ext2fs_block_bitmap) priv_data;
2091
2092         if (!ext2fs_test_block_bitmap2(bmap, *block_nr))
2093                 return 0;
2094         new_blk = translate_block(*block_nr);
2095         if (new_blk) {
2096                 *block_nr = new_blk;
2097                 /*
2098                  * This will force the ext2fs_write_inode in the iterator
2099                  */
2100                 ret |= BLOCK_CHANGED;
2101         }
2102
2103         return ret;
2104 }
2105
2106 static int inode_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2107 {
2108         errcode_t retval = 0;
2109         ext2_ino_t ino;
2110         blk64_t blk;
2111         char *block_buf = 0;
2112         struct ext2_inode inode;
2113         ext2_inode_scan scan = NULL;
2114
2115         retval = ext2fs_get_mem(fs->blocksize * 3, &block_buf);
2116         if (retval)
2117                 return retval;
2118
2119         retval = ext2fs_open_inode_scan(fs, 0, &scan);
2120         if (retval)
2121                 goto err_out;
2122
2123         while (1) {
2124                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
2125                 if (retval)
2126                         goto err_out;
2127
2128                 if (!ino)
2129                         break;
2130
2131                 if (inode.i_links_count == 0)
2132                         continue; /* inode not in use */
2133
2134                 /* FIXME!!
2135                  * If we end up modifying the journal inode
2136                  * the sb->s_jnl_blocks will differ. But a
2137                  * subsequent e2fsck fixes that.
2138                  * Do we need to fix this ??
2139                  */
2140
2141                 if (ext2fs_file_acl_block(fs, &inode) &&
2142                     ext2fs_test_block_bitmap2(bmap,
2143                                         ext2fs_file_acl_block(fs, &inode))) {
2144                         blk = translate_block(ext2fs_file_acl_block(fs,
2145                                                                     &inode));
2146                         if (!blk)
2147                                 continue;
2148
2149                         ext2fs_file_acl_block_set(fs, &inode, blk);
2150
2151                         /*
2152                          * Write the inode to disk so that inode table
2153                          * resizing can work
2154                          */
2155                         retval = ext2fs_write_inode(fs, ino, &inode);
2156                         if (retval)
2157                                 goto err_out;
2158                 }
2159
2160                 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
2161                         continue;
2162
2163                 retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
2164                                                process_block, bmap);
2165                 if (retval)
2166                         goto err_out;
2167
2168         }
2169
2170 err_out:
2171         ext2fs_free_mem(&block_buf);
2172         ext2fs_close_inode_scan(scan);
2173
2174         return retval;
2175 }
2176
2177 /*
2178  * We need to scan for inode and block bitmaps that may need to be
2179  * moved.  This can take place if the filesystem was formatted for
2180  * RAID arrays using the mke2fs's extended option "stride".
2181  */
2182 static int group_desc_scan_and_fix(ext2_filsys fs, ext2fs_block_bitmap bmap)
2183 {
2184         dgrp_t i;
2185         blk64_t blk, new_blk;
2186
2187         for (i = 0; i < fs->group_desc_count; i++) {
2188                 blk = ext2fs_block_bitmap_loc(fs, i);
2189                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2190                         new_blk = translate_block(blk);
2191                         if (!new_blk)
2192                                 continue;
2193                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
2194                 }
2195
2196                 blk = ext2fs_inode_bitmap_loc(fs, i);
2197                 if (ext2fs_test_block_bitmap2(bmap, blk)) {
2198                         new_blk = translate_block(blk);
2199                         if (!new_blk)
2200                                 continue;
2201                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
2202                 }
2203         }
2204         return 0;
2205 }
2206
2207 static int expand_inode_table(ext2_filsys fs, unsigned long new_ino_size)
2208 {
2209         dgrp_t i;
2210         blk64_t blk;
2211         errcode_t retval;
2212         int new_ino_blks_per_grp;
2213         unsigned int j;
2214         char *old_itable = NULL, *new_itable = NULL;
2215         char *tmp_old_itable = NULL, *tmp_new_itable = NULL;
2216         unsigned long old_ino_size;
2217         int old_itable_size, new_itable_size;
2218
2219         old_itable_size = fs->inode_blocks_per_group * fs->blocksize;
2220         old_ino_size = EXT2_INODE_SIZE(fs->super);
2221
2222         new_ino_blks_per_grp = ext2fs_div_ceil(
2223                                         EXT2_INODES_PER_GROUP(fs->super) *
2224                                         new_ino_size,
2225                                         fs->blocksize);
2226
2227         new_itable_size = new_ino_blks_per_grp * fs->blocksize;
2228
2229         retval = ext2fs_get_mem(old_itable_size, &old_itable);
2230         if (retval)
2231                 return retval;
2232
2233         retval = ext2fs_get_mem(new_itable_size, &new_itable);
2234         if (retval)
2235                 goto err_out;
2236
2237         tmp_old_itable = old_itable;
2238         tmp_new_itable = new_itable;
2239
2240         for (i = 0; i < fs->group_desc_count; i++) {
2241                 blk = ext2fs_inode_table_loc(fs, i);
2242                 retval = io_channel_read_blk64(fs->io, blk,
2243                                 fs->inode_blocks_per_group, old_itable);
2244                 if (retval)
2245                         goto err_out;
2246
2247                 for (j = 0; j < EXT2_INODES_PER_GROUP(fs->super); j++) {
2248                         memcpy(new_itable, old_itable, old_ino_size);
2249
2250                         memset(new_itable+old_ino_size, 0,
2251                                         new_ino_size - old_ino_size);
2252
2253                         new_itable += new_ino_size;
2254                         old_itable += old_ino_size;
2255                 }
2256
2257                 /* reset the pointer */
2258                 old_itable = tmp_old_itable;
2259                 new_itable = tmp_new_itable;
2260
2261                 retval = io_channel_write_blk64(fs->io, blk,
2262                                         new_ino_blks_per_grp, new_itable);
2263                 if (retval)
2264                         goto err_out;
2265         }
2266
2267         /* Update the meta data */
2268         fs->inode_blocks_per_group = new_ino_blks_per_grp;
2269         ext2fs_free_inode_cache(fs->icache);
2270         fs->icache = 0;
2271         fs->super->s_inode_size = new_ino_size;
2272
2273 err_out:
2274         if (old_itable)
2275                 ext2fs_free_mem(&old_itable);
2276
2277         if (new_itable)
2278                 ext2fs_free_mem(&new_itable);
2279
2280         return retval;
2281 }
2282
2283 static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
2284 {
2285         blk64_t         blk;
2286         ext2_ino_t      ino;
2287         unsigned int    group = 0;
2288         unsigned int    count = 0;
2289         int             total_free = 0;
2290         int             group_free = 0;
2291
2292         /*
2293          * First calculate the block statistics
2294          */
2295         for (blk = fs->super->s_first_data_block;
2296              blk < ext2fs_blocks_count(fs->super); blk++) {
2297                 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
2298                         group_free++;
2299                         total_free++;
2300                 }
2301                 count++;
2302                 if ((count == fs->super->s_blocks_per_group) ||
2303                     (blk == ext2fs_blocks_count(fs->super)-1)) {
2304                         ext2fs_bg_free_blocks_count_set(fs, group++,
2305                                                         group_free);
2306                         count = 0;
2307                         group_free = 0;
2308                 }
2309         }
2310         total_free = EXT2FS_C2B(fs, total_free);
2311         ext2fs_free_blocks_count_set(fs->super, total_free);
2312
2313         /*
2314          * Next, calculate the inode statistics
2315          */
2316         group_free = 0;
2317         total_free = 0;
2318         count = 0;
2319         group = 0;
2320
2321         /* Protect loop from wrap-around if s_inodes_count maxed */
2322         for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
2323                 if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
2324                         group_free++;
2325                         total_free++;
2326                 }
2327                 count++;
2328                 if ((count == fs->super->s_inodes_per_group) ||
2329                     (ino == fs->super->s_inodes_count)) {
2330                         ext2fs_bg_free_inodes_count_set(fs, group++,
2331                                                         group_free);
2332                         count = 0;
2333                         group_free = 0;
2334                 }
2335         }
2336         fs->super->s_free_inodes_count = total_free;
2337         ext2fs_mark_super_dirty(fs);
2338         return 0;
2339 }
2340
2341 #define list_for_each_safe(pos, pnext, head) \
2342         for (pos = (head)->next, pnext = pos->next; pos != (head); \
2343              pos = pnext, pnext = pos->next)
2344
2345 static void free_blk_move_list(void)
2346 {
2347         struct list_head *entry, *tmp;
2348         struct blk_move *bmv;
2349
2350         list_for_each_safe(entry, tmp, &blk_move_list) {
2351                 bmv = list_entry(entry, struct blk_move, list);
2352                 list_del(entry);
2353                 ext2fs_free_mem(&bmv);
2354         }
2355         return;
2356 }
2357
2358 static int resize_inode(ext2_filsys fs, unsigned long new_size)
2359 {
2360         errcode_t retval;
2361         int new_ino_blks_per_grp;
2362         ext2fs_block_bitmap bmap;
2363
2364         retval = ext2fs_read_inode_bitmap(fs);
2365         if (retval) {
2366                 fputs(_("Failed to read inode bitmap\n"), stderr);
2367                 return retval;
2368         }
2369         retval = ext2fs_read_block_bitmap(fs);
2370         if (retval) {
2371                 fputs(_("Failed to read block bitmap\n"), stderr);
2372                 return retval;
2373         }
2374         INIT_LIST_HEAD(&blk_move_list);
2375
2376
2377         new_ino_blks_per_grp = ext2fs_div_ceil(
2378                                         EXT2_INODES_PER_GROUP(fs->super)*
2379                                         new_size,
2380                                         fs->blocksize);
2381
2382         /* We may change the file system.
2383          * Mark the file system as invalid so that
2384          * the user is prompted to run fsck.
2385          */
2386         fs->super->s_state &= ~EXT2_VALID_FS;
2387
2388         retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"),
2389                                                 &bmap);
2390         if (retval) {
2391                 fputs(_("Failed to allocate block bitmap when "
2392                                 "increasing inode size\n"), stderr);
2393                 return retval;
2394         }
2395         retval = get_move_bitmaps(fs, new_ino_blks_per_grp, bmap);
2396         if (retval) {
2397                 fputs(_("Not enough space to increase inode size \n"), stderr);
2398                 goto err_out;
2399         }
2400         retval = move_block(fs, bmap);
2401         if (retval) {
2402                 fputs(_("Failed to relocate blocks during inode resize \n"),
2403                       stderr);
2404                 goto err_out;
2405         }
2406         retval = inode_scan_and_fix(fs, bmap);
2407         if (retval)
2408                 goto err_out_undo;
2409
2410         retval = group_desc_scan_and_fix(fs, bmap);
2411         if (retval)
2412                 goto err_out_undo;
2413
2414         retval = expand_inode_table(fs, new_size);
2415         if (retval)
2416                 goto err_out_undo;
2417
2418         ext2fs_calculate_summary_stats(fs);
2419
2420         fs->super->s_state |= EXT2_VALID_FS;
2421         /* mark super block and block bitmap as dirty */
2422         ext2fs_mark_super_dirty(fs);
2423         ext2fs_mark_bb_dirty(fs);
2424
2425 err_out:
2426         free_blk_move_list();
2427         ext2fs_free_block_bitmap(bmap);
2428
2429         return retval;
2430
2431 err_out_undo:
2432         free_blk_move_list();
2433         ext2fs_free_block_bitmap(bmap);
2434         fputs(_("Error in resizing the inode size.\n"
2435                         "Run e2undo to undo the "
2436                         "file system changes. \n"), stderr);
2437
2438         return retval;
2439 }
2440
2441 static int tune2fs_setup_tdb(const char *name, io_manager *io_ptr)
2442 {
2443         errcode_t retval = 0;
2444         const char *tdb_dir;
2445         char *tdb_file;
2446         char *dev_name, *tmp_name;
2447
2448 #if 0 /* FIXME!! */
2449         /*
2450          * Configuration via a conf file would be
2451          * nice
2452          */
2453         profile_get_string(profile, "scratch_files",
2454                                         "directory", 0, 0,
2455                                         &tdb_dir);
2456 #endif
2457         tmp_name = strdup(name);
2458         if (!tmp_name) {
2459         alloc_fn_fail:
2460                 com_err(program_name, ENOMEM, "%s",
2461                         _("Couldn't allocate memory for tdb filename\n"));
2462                 return ENOMEM;
2463         }
2464         dev_name = basename(tmp_name);
2465
2466         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
2467         if (!tdb_dir)
2468                 tdb_dir = "/var/lib/e2fsprogs";
2469
2470         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
2471             access(tdb_dir, W_OK))
2472                 return 0;
2473
2474         tdb_file = malloc(strlen(tdb_dir) + 9 + strlen(dev_name) + 7 + 1);
2475         if (!tdb_file)
2476                 goto alloc_fn_fail;
2477         sprintf(tdb_file, "%s/tune2fs-%s.e2undo", tdb_dir, dev_name);
2478
2479         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
2480                 retval = errno;
2481                 com_err(program_name, retval,
2482                         _("while trying to delete %s"), tdb_file);
2483                 free(tdb_file);
2484                 return retval;
2485         }
2486
2487         set_undo_io_backing_manager(*io_ptr);
2488         *io_ptr = undo_io_manager;
2489         set_undo_io_backup_file(tdb_file);
2490         printf(_("To undo the tune2fs operation please run "
2491                  "the command\n    e2undo %s %s\n\n"),
2492                  tdb_file, name);
2493         free(tdb_file);
2494         free(tmp_name);
2495         return retval;
2496 }
2497
2498 int
2499 fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
2500 {
2501         int retval, nr_users, start;
2502         journal_superblock_t *jsb;
2503         ext2_filsys jfs;
2504         __u8 *j_uuid;
2505         char *journal_path;
2506         char uuid[UUID_STR_SIZE];
2507         char buf[SUPERBLOCK_SIZE];
2508
2509         if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) ||
2510                 uuid_is_null(sb->s_journal_uuid))
2511                 return 0;
2512
2513         uuid_unparse(sb->s_journal_uuid, uuid);
2514         journal_path = blkid_get_devname(NULL, "UUID", uuid);
2515         if (!journal_path)
2516                 return 0;
2517
2518         retval = ext2fs_open2(journal_path, io_options,
2519                               EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_RW,
2520                               0, 0, unix_io_manager, &jfs);
2521         if (retval) {
2522                 com_err(program_name, retval,
2523                         _("while trying to open %s"),
2524                         journal_path);
2525                 return retval;
2526         }
2527
2528         retval = get_journal_sb(jfs, buf);
2529         if (retval != 0) {
2530                 if (retval == EXT2_ET_UNSUPP_FEATURE)
2531                         fprintf(stderr, _("%s is not a journal device.\n"),
2532                                 journal_path);
2533                 return retval;
2534         }
2535
2536         jsb = (journal_superblock_t *) buf;
2537         /* Find the filesystem UUID */
2538         nr_users = ntohl(jsb->s_nr_users);
2539
2540         j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
2541         if (j_uuid == NULL) {
2542                 fputs(_("Filesystem's UUID not found on journal device.\n"),
2543                       stderr);
2544                 return EXT2_ET_LOAD_EXT_JOURNAL;
2545         }
2546
2547         memcpy(j_uuid, sb->s_uuid, UUID_SIZE);
2548
2549         start = ext2fs_journal_sb_start(jfs->blocksize);
2550         /* Write back the journal superblock */
2551         retval = io_channel_write_blk64(jfs->io, start, -SUPERBLOCK_SIZE, buf);
2552         if (retval != 0) {
2553                 com_err(program_name, retval,
2554                         "while writing journal superblock.");
2555                 return retval;
2556         }
2557
2558         ext2fs_close(jfs);
2559
2560         return 0;
2561 }
2562
2563 int main(int argc, char **argv)
2564 {
2565         errcode_t retval;
2566         ext2_filsys fs;
2567         struct ext2_super_block *sb;
2568         io_manager io_ptr, io_ptr_orig = NULL;
2569         int rc = 0;
2570
2571 #ifdef ENABLE_NLS
2572         setlocale(LC_MESSAGES, "");
2573         setlocale(LC_CTYPE, "");
2574         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
2575         textdomain(NLS_CAT_NAME);
2576         set_com_err_gettext(gettext);
2577 #endif
2578         if (argc && *argv)
2579                 program_name = *argv;
2580         add_error_table(&et_ext2_error_table);
2581
2582 #ifdef CONFIG_BUILD_FINDFS
2583         if (strcmp(get_progname(argv[0]), "findfs") == 0)
2584                 do_findfs(argc, argv);
2585 #endif
2586         if (strcmp(get_progname(argv[0]), "e2label") == 0)
2587                 parse_e2label_options(argc, argv);
2588         else
2589                 parse_tune2fs_options(argc, argv);
2590
2591 #ifdef CONFIG_TESTIO_DEBUG
2592         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_DEBUG")) {
2593                 io_ptr = test_io_manager;
2594                 test_io_backing_manager = unix_io_manager;
2595         } else
2596 #endif
2597                 io_ptr = unix_io_manager;
2598
2599 retry_open:
2600         if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
2601                 open_flag |= EXT2_FLAG_SKIP_MMP;
2602
2603         open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
2604
2605         /* keep the filesystem struct around to dump MMP data */
2606         open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
2607
2608         retval = ext2fs_open2(device_name, io_options, open_flag,
2609                               0, 0, io_ptr, &fs);
2610         if (retval) {
2611                 com_err(program_name, retval,
2612                         _("while trying to open %s"),
2613                         device_name);
2614                 if (retval == EXT2_ET_MMP_FSCK_ON ||
2615                     retval == EXT2_ET_MMP_UNKNOWN_SEQ)
2616                         dump_mmp_msg(fs->mmp_buf,
2617                                      _("If you are sure the filesystem "
2618                                        "is not in use on any node, run:\n"
2619                                        "'tune2fs -f -E clear_mmp {device}'\n"));
2620                 else if (retval == EXT2_ET_MMP_FAILED)
2621                         dump_mmp_msg(fs->mmp_buf, NULL);
2622                 else if (retval == EXT2_ET_MMP_MAGIC_INVALID)
2623                         fprintf(stderr,
2624                                 _("MMP block magic is bad. Try to fix it by "
2625                                   "running:\n'e2fsck -f %s'\n"), device_name);
2626                 else if (retval == EXT2_ET_BAD_MAGIC)
2627                         check_plausibility(device_name, CHECK_FS_EXIST, NULL);
2628                 else if (retval != EXT2_ET_MMP_FAILED)
2629                         fprintf(stderr, "%s",
2630                              _("Couldn't find valid filesystem superblock.\n"));
2631
2632                 ext2fs_free(fs);
2633                 exit(1);
2634         }
2635         if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
2636                                       EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2637                 fprintf(stderr, "%s", _("Cannot modify a journal device.\n"));
2638                 ext2fs_free(fs);
2639                 exit(1);
2640         }
2641         fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
2642
2643         if (I_flag && !io_ptr_orig) {
2644                 /*
2645                  * Check the inode size is right so we can issue an
2646                  * error message and bail before setting up the tdb
2647                  * file.
2648                  */
2649                 if (new_inode_size == EXT2_INODE_SIZE(fs->super)) {
2650                         fprintf(stderr, _("The inode size is already %lu\n"),
2651                                 new_inode_size);
2652                         rc = 1;
2653                         goto closefs;
2654                 }
2655                 if (new_inode_size < EXT2_INODE_SIZE(fs->super)) {
2656                         fprintf(stderr, "%s",
2657                                 _("Shrinking inode size is not supported\n"));
2658                         rc = 1;
2659                         goto closefs;
2660                 }
2661                 if (new_inode_size > fs->blocksize) {
2662                         fprintf(stderr, _("Invalid inode size %lu (max %d)\n"),
2663                                 new_inode_size, fs->blocksize);
2664                         rc = 1;
2665                         goto closefs;
2666                 }
2667
2668                 /*
2669                  * If inode resize is requested use the
2670                  * Undo I/O manager
2671                  */
2672                 io_ptr_orig = io_ptr;
2673                 retval = tune2fs_setup_tdb(device_name, &io_ptr);
2674                 if (retval) {
2675                         rc = 1;
2676                         goto closefs;
2677                 }
2678                 if (io_ptr != io_ptr_orig) {
2679                         ext2fs_close_free(&fs);
2680                         goto retry_open;
2681                 }
2682         }
2683
2684         sb = fs->super;
2685         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2686
2687         if (print_label) {
2688                 /* For e2label emulation */
2689                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
2690                        sb->s_volume_name);
2691                 remove_error_table(&et_ext2_error_table);
2692                 goto closefs;
2693         }
2694
2695         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
2696         if (retval) {
2697                 com_err("ext2fs_check_if_mount", retval,
2698                         _("while determining whether %s is mounted."),
2699                         device_name);
2700                 rc = 1;
2701                 goto closefs;
2702         }
2703         /* Normally we only need to write out the superblock */
2704         fs->flags |= EXT2_FLAG_SUPER_ONLY;
2705
2706         if (c_flag) {
2707                 sb->s_max_mnt_count = max_mount_count;
2708                 ext2fs_mark_super_dirty(fs);
2709                 printf(_("Setting maximal mount count to %d\n"),
2710                        max_mount_count);
2711         }
2712         if (C_flag) {
2713                 sb->s_mnt_count = mount_count;
2714                 ext2fs_mark_super_dirty(fs);
2715                 printf(_("Setting current mount count to %d\n"), mount_count);
2716         }
2717         if (e_flag) {
2718                 sb->s_errors = errors;
2719                 ext2fs_mark_super_dirty(fs);
2720                 printf(_("Setting error behavior to %d\n"), errors);
2721         }
2722         if (g_flag) {
2723                 sb->s_def_resgid = resgid;
2724                 ext2fs_mark_super_dirty(fs);
2725                 printf(_("Setting reserved blocks gid to %lu\n"), resgid);
2726         }
2727         if (i_flag) {
2728                 if ((unsigned long long)interval >= (1ULL << 32)) {
2729                         com_err(program_name, 0,
2730                                 _("interval between checks is too big (%lu)"),
2731                                 interval);
2732                         rc = 1;
2733                         goto closefs;
2734                 }
2735                 sb->s_checkinterval = interval;
2736                 ext2fs_mark_super_dirty(fs);
2737                 printf(_("Setting interval between checks to %lu seconds\n"),
2738                        interval);
2739         }
2740         if (m_flag) {
2741                 ext2fs_r_blocks_count_set(sb, reserved_ratio *
2742                                           ext2fs_blocks_count(sb) / 100.0);
2743                 ext2fs_mark_super_dirty(fs);
2744                 printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
2745                         reserved_ratio, ext2fs_r_blocks_count(sb));
2746         }
2747         if (r_flag) {
2748                 if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
2749                         com_err(program_name, 0,
2750                                 _("reserved blocks count is too big (%llu)"),
2751                                 reserved_blocks);
2752                         rc = 1;
2753                         goto closefs;
2754                 }
2755                 ext2fs_r_blocks_count_set(sb, reserved_blocks);
2756                 ext2fs_mark_super_dirty(fs);
2757                 printf(_("Setting reserved blocks count to %llu\n"),
2758                        reserved_blocks);
2759         }
2760         if (s_flag == 1) {
2761                 if (sb->s_feature_ro_compat &
2762                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
2763                         fputs(_("\nThe filesystem already has sparse "
2764                                 "superblocks.\n"), stderr);
2765                 } else if (sb->s_feature_incompat &
2766                         EXT2_FEATURE_INCOMPAT_META_BG) {
2767                         fputs(_("\nSetting the sparse superblock flag not "
2768                                 "supported\nfor filesystems with "
2769                                 "the meta_bg feature enabled.\n"),
2770                                 stderr);
2771                         rc = 1;
2772                         goto closefs;
2773                 } else {
2774                         sb->s_feature_ro_compat |=
2775                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
2776                         sb->s_state &= ~EXT2_VALID_FS;
2777                         ext2fs_mark_super_dirty(fs);
2778                         printf(_("\nSparse superblock flag set.  %s"),
2779                                _(please_fsck));
2780                 }
2781         }
2782         if (s_flag == 0) {
2783                 fputs(_("\nClearing the sparse superblock flag not supported.\n"),
2784                       stderr);
2785                 rc = 1;
2786                 goto closefs;
2787         }
2788         if (T_flag) {
2789                 sb->s_lastcheck = last_check_time;
2790                 ext2fs_mark_super_dirty(fs);
2791                 printf(_("Setting time filesystem last checked to %s\n"),
2792                        ctime(&last_check_time));
2793         }
2794         if (u_flag) {
2795                 sb->s_def_resuid = resuid;
2796                 ext2fs_mark_super_dirty(fs);
2797                 printf(_("Setting reserved blocks uid to %lu\n"), resuid);
2798         }
2799         if (L_flag) {
2800                 if (strlen(new_label) > sizeof(sb->s_volume_name))
2801                         fputs(_("Warning: label too long, truncating.\n"),
2802                               stderr);
2803                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
2804                 strncpy(sb->s_volume_name, new_label,
2805                         sizeof(sb->s_volume_name));
2806                 ext2fs_mark_super_dirty(fs);
2807         }
2808         if (M_flag) {
2809                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
2810                 strncpy(sb->s_last_mounted, new_last_mounted,
2811                         sizeof(sb->s_last_mounted));
2812                 ext2fs_mark_super_dirty(fs);
2813         }
2814         if (mntopts_cmd) {
2815                 rc = update_mntopts(fs, mntopts_cmd);
2816                 if (rc)
2817                         goto closefs;
2818         }
2819         if (features_cmd) {
2820                 rc = update_feature_set(fs, features_cmd);
2821                 if (rc)
2822                         goto closefs;
2823         }
2824         if (extended_cmd) {
2825                 rc = parse_extended_opts(fs, extended_cmd);
2826                 if (rc)
2827                         goto closefs;
2828                 if (clear_mmp && !f_flag) {
2829                         fputs(_("Error in using clear_mmp. "
2830                                 "It must be used with -f\n"),
2831                               stderr);
2832                         goto closefs;
2833                 }
2834         }
2835         if (clear_mmp) {
2836                 rc = ext2fs_mmp_clear(fs);
2837                 goto closefs;
2838         }
2839         if (journal_size || journal_device) {
2840                 rc = add_journal(fs);
2841                 if (rc)
2842                         goto closefs;
2843         }
2844
2845         if (Q_flag) {
2846                 if (mount_flags & EXT2_MF_MOUNTED) {
2847                         fputs(_("The quota feature may only be changed when "
2848                                 "the filesystem is unmounted.\n"), stderr);
2849                         rc = 1;
2850                         goto closefs;
2851                 }
2852                 handle_quota_options(fs);
2853         }
2854
2855         if (U_flag) {
2856                 int set_csum = 0;
2857                 dgrp_t i;
2858                 char buf[SUPERBLOCK_SIZE];
2859                 __u8 old_uuid[UUID_SIZE];
2860
2861                 if (ext2fs_has_group_desc_csum(fs)) {
2862                         /*
2863                          * Changing the UUID requires rewriting all metadata,
2864                          * which can race with a mounted fs.  Don't allow that.
2865                          */
2866                         if (mount_flags & EXT2_MF_MOUNTED) {
2867                                 fputs(_("The UUID may only be "
2868                                         "changed when the filesystem is "
2869                                         "unmounted.\n"), stderr);
2870                                 exit(1);
2871                         }
2872                         if (check_fsck_needed(fs))
2873                                 exit(1);
2874
2875                         /*
2876                          * Determine if the block group checksums are
2877                          * correct so we know whether or not to set
2878                          * them later on.
2879                          */
2880                         for (i = 0; i < fs->group_desc_count; i++)
2881                                 if (!ext2fs_group_desc_csum_verify(fs, i))
2882                                         break;
2883                         if (i >= fs->group_desc_count)
2884                                 set_csum = 1;
2885                 }
2886
2887                 memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
2888                 if ((strcasecmp(new_UUID, "null") == 0) ||
2889                     (strcasecmp(new_UUID, "clear") == 0)) {
2890                         uuid_clear(sb->s_uuid);
2891                 } else if (strcasecmp(new_UUID, "time") == 0) {
2892                         uuid_generate_time(sb->s_uuid);
2893                 } else if (strcasecmp(new_UUID, "random") == 0) {
2894                         uuid_generate(sb->s_uuid);
2895                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
2896                         com_err(program_name, 0, "%s",
2897                                 _("Invalid UUID format\n"));
2898                         rc = 1;
2899                         goto closefs;
2900                 }
2901                 ext2fs_init_csum_seed(fs);
2902                 if (set_csum) {
2903                         for (i = 0; i < fs->group_desc_count; i++)
2904                                 ext2fs_group_desc_csum_set(fs, i);
2905                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2906                 }
2907
2908                 /* If this is a journal dev, we need to copy UUID into jsb */
2909                 if (!(rc = get_journal_sb(fs, buf))) {
2910                         journal_superblock_t *jsb;
2911
2912                         jsb = (journal_superblock_t *) buf;
2913                         fputs(_("Need to update journal superblock.\n"), stdout);
2914                         memcpy(jsb->s_uuid, sb->s_uuid, sizeof(sb->s_uuid));
2915
2916                         /* Writeback the journal superblock */
2917                         if ((rc = io_channel_write_blk64(fs->io,
2918                                 ext2fs_journal_sb_start(fs->blocksize),
2919                                         -SUPERBLOCK_SIZE, buf)))
2920                                 goto closefs;
2921                 } else if (rc != EXT2_ET_UNSUPP_FEATURE)
2922                         goto closefs;
2923                 else {
2924                         rc = 0; /** Reset rc to avoid ext2fs_mmp_stop() */
2925
2926                         if ((rc = fs_update_journal_user(sb, old_uuid)))
2927                                 goto closefs;
2928                 }
2929
2930                 ext2fs_mark_super_dirty(fs);
2931                 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
2932                                 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
2933                         rewrite_checksums = 1;
2934         }
2935
2936         if (I_flag) {
2937                 if (mount_flags & EXT2_MF_MOUNTED) {
2938                         fputs(_("The inode size may only be "
2939                                 "changed when the filesystem is "
2940                                 "unmounted.\n"), stderr);
2941                         rc = 1;
2942                         goto closefs;
2943                 }
2944                 if (fs->super->s_feature_incompat &
2945                     EXT4_FEATURE_INCOMPAT_FLEX_BG) {
2946                         fputs(_("Changing the inode size not supported for "
2947                                 "filesystems with the flex_bg\n"
2948                                 "feature enabled.\n"),
2949                               stderr);
2950                         rc = 1;
2951                         goto closefs;
2952                 }
2953                 /*
2954                  * We want to update group descriptor also
2955                  * with the new free inode count
2956                  */
2957                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
2958                 if (resize_inode(fs, new_inode_size) == 0) {
2959                         printf(_("Setting inode size %lu\n"),
2960                                                         new_inode_size);
2961                         rewrite_checksums = 1;
2962                 } else {
2963                         printf("%s", _("Failed to change inode size\n"));
2964                         rc = 1;
2965                         goto closefs;
2966                 }
2967         }
2968
2969         if (rewrite_checksums)
2970                 rewrite_metadata_checksums(fs);
2971
2972         if (l_flag)
2973                 list_super(sb);
2974         if (stride_set) {
2975                 sb->s_raid_stride = stride;
2976                 ext2fs_mark_super_dirty(fs);
2977                 printf(_("Setting stride size to %d\n"), stride);
2978         }
2979         if (stripe_width_set) {
2980                 sb->s_raid_stripe_width = stripe_width;
2981                 ext2fs_mark_super_dirty(fs);
2982                 printf(_("Setting stripe width to %d\n"), stripe_width);
2983         }
2984         if (ext_mount_opts) {
2985                 strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
2986                         sizeof(fs->super->s_mount_opts));
2987                 fs->super->s_mount_opts[sizeof(fs->super->s_mount_opts)-1] = 0;
2988                 ext2fs_mark_super_dirty(fs);
2989                 printf(_("Setting extended default mount options to '%s'\n"),
2990                        ext_mount_opts);
2991                 free(ext_mount_opts);
2992         }
2993         free(device_name);
2994         remove_error_table(&et_ext2_error_table);
2995
2996 closefs:
2997         if (rc) {
2998                 ext2fs_mmp_stop(fs);
2999                 exit(1);
3000         }
3001
3002         return (ext2fs_close_free(&fs) ? 1 : 0);
3003 }