diff options
Diffstat (limited to 'release/src/router/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c')
| -rw-r--r-- | release/src/router/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/release/src/router/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c new file mode 100644 index 00000000..1d39ed1b --- /dev/null +++ b/release/src/router/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c @@ -0,0 +1,710 @@ +/* vi: set sw=4 ts=4: */ +/* + * tune2fs.c - Change the file system parameters on an ext2 file system + * + * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr> + * Laboratoire MASI, Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ + +/* + * History: + * 93/06/01 - Creation + * 93/10/31 - Added the -c option to change the maximal mount counts + * 93/12/14 - Added -l flag to list contents of superblock + * M.J.E. Mol (marcel@duteca.et.tudelft.nl) + * F.W. ten Wolde (franky@duteca.et.tudelft.nl) + * 93/12/29 - Added the -e option to change errors behavior + * 94/02/27 - Ported to use the ext2fs library + * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de) + */ + +#include <sys/types.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <getopt.h> + +#include "e2fsbb.h" +#include "ext2fs/ext2_fs.h" +#include "ext2fs/ext2fs.h" +#include "uuid/uuid.h" +#include "e2p/e2p.h" +#include "ext2fs/kernel-jbd.h" +#include "util.h" +#include "blkid/blkid.h" + +#include "libbb.h" + +static char * device_name = NULL; +static char * new_label, *new_last_mounted, *new_UUID; +static char * io_options; +static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag; +static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag; +static time_t last_check_time; +static int print_label; +static int max_mount_count, mount_count, mount_flags; +static unsigned long interval, reserved_blocks; +static unsigned reserved_ratio; +static unsigned long resgid, resuid; +static unsigned short errors; +static int open_flag; +static char *features_cmd; +static char *mntopts_cmd; + +static int journal_size, journal_flags; +static char *journal_device = NULL; + +static const char *please_fsck = "Please run e2fsck on the filesystem\n"; + +static __u32 ok_features[3] = { + EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX, + EXT2_FEATURE_INCOMPAT_FILETYPE, + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER +}; + +/* + * Remove an external journal from the filesystem + */ +static void remove_journal_device(ext2_filsys fs) +{ + char *journal_path; + ext2_filsys jfs; + char buf[1024]; + journal_superblock_t *jsb; + int i, nr_users; + errcode_t retval; + int commit_remove_journal = 0; + io_manager io_ptr; + + if (f_flag) + commit_remove_journal = 1; /* force removal even if error */ + + uuid_unparse(fs->super->s_journal_uuid, buf); + journal_path = blkid_get_devname(NULL, "UUID", buf); + + if (!journal_path) { + journal_path = + ext2fs_find_block_device(fs->super->s_journal_dev); + if (!journal_path) + return; + } + + io_ptr = unix_io_manager; + retval = ext2fs_open(journal_path, EXT2_FLAG_RW| + EXT2_FLAG_JOURNAL_DEV_OK, 0, + fs->blocksize, io_ptr, &jfs); + if (retval) { + bb_error_msg("Failed to open external journal"); + goto no_valid_journal; + } + if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { + bb_error_msg("%s is not a journal device", journal_path); + goto no_valid_journal; + } + + /* Get the journal superblock */ + if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) { + bb_error_msg("Failed to read journal superblock"); + goto no_valid_journal; + } + + jsb = (journal_superblock_t *) buf; + if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || + (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) { + bb_error_msg("Journal superblock not found!"); + goto no_valid_journal; + } + + /* Find the filesystem UUID */ + nr_users = ntohl(jsb->s_nr_users); + for (i=0; i < nr_users; i++) { + if (memcmp(fs->super->s_uuid, + &jsb->s_users[i*16], 16) == 0) + break; + } + if (i >= nr_users) { + bb_error_msg("Filesystem's UUID not found on journal device"); + commit_remove_journal = 1; + goto no_valid_journal; + } + nr_users--; + for (i=0; i < nr_users; i++) + memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16); + jsb->s_nr_users = htonl(nr_users); + + /* Write back the journal superblock */ + if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) { + bb_error_msg("Failed to write journal superblock"); + goto no_valid_journal; + } + + commit_remove_journal = 1; + +no_valid_journal: + if (commit_remove_journal == 0) + bb_error_msg_and_die("Journal NOT removed"); + fs->super->s_journal_dev = 0; + uuid_clear(fs->super->s_journal_uuid); + ext2fs_mark_super_dirty(fs); + puts("Journal removed"); + free(journal_path); +} + +/* Helper function for remove_journal_inode */ +static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr, + int blockcnt EXT2FS_ATTR((unused)), + void *private EXT2FS_ATTR((unused))) +{ + blk_t block; + int group; + + block = *blocknr; + ext2fs_unmark_block_bitmap(fs->block_map,block); + group = ext2fs_group_of_blk(fs, block); + fs->group_desc[group].bg_free_blocks_count++; + fs->super->s_free_blocks_count++; + return 0; +} + +/* + * Remove the journal inode from the filesystem + */ +static void remove_journal_inode(ext2_filsys fs) +{ + struct ext2_inode inode; + errcode_t retval; + ino_t ino = fs->super->s_journal_inum; + char *msg = "to read"; + char *s = "journal inode"; + + retval = ext2fs_read_inode(fs, ino, &inode); + if (retval) + goto REMOVE_JOURNAL_INODE_ERROR; + if (ino == EXT2_JOURNAL_INO) { + retval = ext2fs_read_bitmaps(fs); + if (retval) { + msg = "to read bitmaps"; + s = ""; + goto REMOVE_JOURNAL_INODE_ERROR; + } + retval = ext2fs_block_iterate(fs, ino, 0, NULL, + release_blocks_proc, NULL); + if (retval) { + msg = "clearing"; + goto REMOVE_JOURNAL_INODE_ERROR; + } + memset(&inode, 0, sizeof(inode)); + ext2fs_mark_bb_dirty(fs); + fs->flags &= ~EXT2_FLAG_SUPER_ONLY; + } else + inode.i_flags &= ~EXT2_IMMUTABLE_FL; + retval = ext2fs_write_inode(fs, ino, &inode); + if (retval) { + msg = "writing"; +REMOVE_JOURNAL_INODE_ERROR: + bb_error_msg_and_die("Failed %s %s", msg, s); + } + fs->super->s_journal_inum = 0; + ext2fs_mark_super_dirty(fs); +} + +/* + * Update the default mount options + */ +static void update_mntopts(ext2_filsys fs, char *mntopts) +{ + struct ext2_super_block *sb= fs->super; + + if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) + bb_error_msg_and_die("Invalid mount option set: %s", mntopts); + ext2fs_mark_super_dirty(fs); +} + +/* + * Update the feature set as provided by the user. + */ +static void update_feature_set(ext2_filsys fs, char *features) +{ + int sparse, old_sparse, filetype, old_filetype; + int journal, old_journal, dxdir, old_dxdir; + struct ext2_super_block *sb= fs->super; + __u32 old_compat, old_incompat, old_ro_compat; + + old_compat = sb->s_feature_compat; + old_ro_compat = sb->s_feature_ro_compat; + old_incompat = sb->s_feature_incompat; + + old_sparse = sb->s_feature_ro_compat & + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; + old_filetype = sb->s_feature_incompat & + EXT2_FEATURE_INCOMPAT_FILETYPE; + old_journal = sb->s_feature_compat & + EXT3_FEATURE_COMPAT_HAS_JOURNAL; + old_dxdir = sb->s_feature_compat & + EXT2_FEATURE_COMPAT_DIR_INDEX; + if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features)) + bb_error_msg_and_die("Invalid filesystem option set: %s", features); + sparse = sb->s_feature_ro_compat & + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; + filetype = sb->s_feature_incompat & + EXT2_FEATURE_INCOMPAT_FILETYPE; + journal = sb->s_feature_compat & + EXT3_FEATURE_COMPAT_HAS_JOURNAL; + dxdir = sb->s_feature_compat & + EXT2_FEATURE_COMPAT_DIR_INDEX; + if (old_journal && !journal) { + if ((mount_flags & EXT2_MF_MOUNTED) && + !(mount_flags & EXT2_MF_READONLY)) { + bb_error_msg_and_die( + "The has_journal flag may only be " + "cleared when the filesystem is\n" + "unmounted or mounted " + "read-only"); + } + if (sb->s_feature_incompat & + EXT3_FEATURE_INCOMPAT_RECOVER) { + bb_error_msg_and_die( + "The needs_recovery flag is set. " + "%s before clearing the has_journal flag.", + please_fsck); + } + if (sb->s_journal_inum) { + remove_journal_inode(fs); + } + if (sb->s_journal_dev) { + remove_journal_device(fs); + } + } + if (journal && !old_journal) { + /* + * If adding a journal flag, let the create journal + * code below handle creating setting the flag and + * creating the journal. We supply a default size if + * necessary. + */ + if (!journal_size) + journal_size = -1; + sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; + } + if (dxdir && !old_dxdir) { + if (!sb->s_def_hash_version) + sb->s_def_hash_version = EXT2_HASH_TEA; + if (uuid_is_null((unsigned char *) sb->s_hash_seed)) + uuid_generate((unsigned char *) sb->s_hash_seed); + } + + if (sb->s_rev_level == EXT2_GOOD_OLD_REV && + (sb->s_feature_compat || sb->s_feature_ro_compat || + sb->s_feature_incompat)) + ext2fs_update_dynamic_rev(fs); + if ((sparse != old_sparse) || + (filetype != old_filetype)) { + sb->s_state &= ~EXT2_VALID_FS; + printf("\n%s\n", please_fsck); + } + if ((old_compat != sb->s_feature_compat) || + (old_ro_compat != sb->s_feature_ro_compat) || + (old_incompat != sb->s_feature_incompat)) + ext2fs_mark_super_dirty(fs); +} + +/* + * Add a journal to the filesystem. + */ +static void add_journal(ext2_filsys fs) +{ + if (fs->super->s_feature_compat & + EXT3_FEATURE_COMPAT_HAS_JOURNAL) { + bb_error_msg_and_die("The filesystem already has a journal"); + } + if (journal_device) { + make_journal_device(journal_device, fs, 0, 0); + } else if (journal_size) { + make_journal_blocks(fs, journal_size, journal_flags, 0); + /* + * If the filesystem wasn't mounted, we need to force + * the block group descriptors out. + */ + if ((mount_flags & EXT2_MF_MOUNTED) == 0) + fs->flags &= ~EXT2_FLAG_SUPER_ONLY; + } + print_check_message(fs); +} + +/* + * Busybox stuff + */ +static char * x_blkid_get_devname(const char *token) +{ + char * dev_name; + + if (!(dev_name = blkid_get_devname(NULL, token, NULL))) + bb_error_msg_and_die("Unable to resolve '%s'", token); + return dev_name; +} + +#ifdef CONFIG_E2LABEL +static void parse_e2label_options(int argc, char ** argv) +{ + if ((argc < 2) || (argc > 3)) + bb_show_usage(); + io_options = strchr(argv[1], '?'); + if (io_options) + *io_options++ = 0; + device_name = x_blkid_get_devname(argv[1]); + if (argc == 3) { + open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK; + L_flag = 1; + new_label = argv[2]; + } else + print_label++; +} +#else +#define parse_e2label_options(x,y) +#endif + +static time_t parse_time(char *str) +{ + struct tm ts; + + if (strcmp(str, "now") == 0) { + return time(0); + } + memset(&ts, 0, sizeof(ts)); +#ifdef HAVE_STRPTIME + strptime(str, "%Y%m%d%H%M%S", &ts); +#else + sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon, + &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec); + ts.tm_year -= 1900; + ts.tm_mon -= 1; + if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 || + ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 || + ts.tm_min > 59 || ts.tm_sec > 61) + ts.tm_mday = 0; +#endif + if (ts.tm_mday == 0) { + bb_error_msg_and_die("Cannot parse date/time specifier: %s", str); + } + return mktime(&ts); +} + +static void parse_tune2fs_options(int argc, char **argv) +{ + int c; + char * tmp; + + printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); + while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF) + switch (c) + { + case 'c': + max_mount_count = xatou_range(optarg, 0, 16000); + if (max_mount_count == 0) + max_mount_count = -1; + c_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'C': + mount_count = xatou_range(optarg, 0, 16000); + C_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'e': + if (strcmp (optarg, "continue") == 0) + errors = EXT2_ERRORS_CONTINUE; + else if (strcmp (optarg, "remount-ro") == 0) + errors = EXT2_ERRORS_RO; + else if (strcmp (optarg, "panic") == 0) + errors = EXT2_ERRORS_PANIC; + else { + bb_error_msg_and_die("bad error behavior - %s", optarg); + } + e_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'f': /* Force */ + f_flag = 1; + break; + case 'g': + resgid = bb_strtoul(optarg, NULL, 10); + if (errno) + resgid = xgroup2gid(optarg); + g_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'i': + interval = strtoul(optarg, &tmp, 0); + switch (*tmp) { + case 's': + tmp++; + break; + case '\0': + case 'd': + case 'D': /* days */ + interval *= 86400; + if (*tmp != '\0') + tmp++; + break; + case 'm': + case 'M': /* months! */ + interval *= 86400 * 30; + tmp++; + break; + case 'w': + case 'W': /* weeks */ + interval *= 86400 * 7; + tmp++; + break; + } + if (*tmp || interval > (365 * 86400)) { + bb_error_msg_and_die("bad interval - %s", optarg); + } + i_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'j': + if (!journal_size) + journal_size = -1; + open_flag = EXT2_FLAG_RW; + break; + case 'J': + parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); + open_flag = EXT2_FLAG_RW; + break; + case 'l': + l_flag = 1; + break; + case 'L': + new_label = optarg; + L_flag = 1; + open_flag = EXT2_FLAG_RW | + EXT2_FLAG_JOURNAL_DEV_OK; + break; + case 'm': + reserved_ratio = xatou_range(optarg, 0, 50); + m_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'M': + new_last_mounted = optarg; + M_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'o': + if (mntopts_cmd) { + bb_error_msg_and_die("-o may only be specified once"); + } + mntopts_cmd = optarg; + open_flag = EXT2_FLAG_RW; + break; + + case 'O': + if (features_cmd) { + bb_error_msg_and_die("-O may only be specified once"); + } + features_cmd = optarg; + open_flag = EXT2_FLAG_RW; + break; + case 'r': + reserved_blocks = xatoul(optarg); + r_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 's': + s_flag = atoi(optarg); + open_flag = EXT2_FLAG_RW; + break; + case 'T': + T_flag = 1; + last_check_time = parse_time(optarg); + open_flag = EXT2_FLAG_RW; + break; + case 'u': + resuid = bb_strtoul(optarg, NULL, 10); + if (errno) + resuid = xuname2uid(optarg); + u_flag = 1; + open_flag = EXT2_FLAG_RW; + break; + case 'U': + new_UUID = optarg; + U_flag = 1; + open_flag = EXT2_FLAG_RW | + EXT2_FLAG_JOURNAL_DEV_OK; + break; + default: + bb_show_usage(); + } + if (optind < argc - 1 || optind == argc) + bb_show_usage(); + if (!open_flag && !l_flag) + bb_show_usage(); + io_options = strchr(argv[optind], '?'); + if (io_options) + *io_options++ = 0; + device_name = x_blkid_get_devname(argv[optind]); +} + +static void tune2fs_clean_up(void) +{ + if (ENABLE_FEATURE_CLEAN_UP && device_name) free(device_name); + if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); +} + +int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int tune2fs_main(int argc, char **argv) +{ + errcode_t retval; + ext2_filsys fs; + struct ext2_super_block *sb; + io_manager io_ptr; + + if (ENABLE_FEATURE_CLEAN_UP) + atexit(tune2fs_clean_up); + + if (ENABLE_E2LABEL && (applet_name[0] == 'e')) /* e2label */ + parse_e2label_options(argc, argv); + else + parse_tune2fs_options(argc, argv); /* tune2fs */ + + io_ptr = unix_io_manager; + retval = ext2fs_open2(device_name, io_options, open_flag, + 0, 0, io_ptr, &fs); + if (retval) + bb_error_msg_and_die("No valid superblock on %s", device_name); + sb = fs->super; + if (print_label) { + /* For e2label emulation */ + printf("%.*s\n", (int) sizeof(sb->s_volume_name), + sb->s_volume_name); + return 0; + } + retval = ext2fs_check_if_mounted(device_name, &mount_flags); + if (retval) + bb_error_msg_and_die("cannot determine if %s is mounted", device_name); + /* Normally we only need to write out the superblock */ + fs->flags |= EXT2_FLAG_SUPER_ONLY; + + if (c_flag) { + sb->s_max_mnt_count = max_mount_count; + ext2fs_mark_super_dirty(fs); + printf("Setting maximal mount count to %d\n", max_mount_count); + } + if (C_flag) { + sb->s_mnt_count = mount_count; + ext2fs_mark_super_dirty(fs); + printf("Setting current mount count to %d\n", mount_count); + } + if (e_flag) { + sb->s_errors = errors; + ext2fs_mark_super_dirty(fs); + printf("Setting error behavior to %d\n", errors); + } + if (g_flag) { + sb->s_def_resgid = resgid; + ext2fs_mark_super_dirty(fs); + printf("Setting reserved blocks gid to %lu\n", resgid); + } + if (i_flag) { + sb->s_checkinterval = interval; + ext2fs_mark_super_dirty(fs); + printf("Setting interval between check %lu seconds\n", interval); + } + if (m_flag) { + sb->s_r_blocks_count = (sb->s_blocks_count / 100) + * reserved_ratio; + ext2fs_mark_super_dirty(fs); + printf("Setting reserved blocks percentage to %u (%u blocks)\n", + reserved_ratio, sb->s_r_blocks_count); + } + if (r_flag) { + if (reserved_blocks >= sb->s_blocks_count/2) + bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks); + sb->s_r_blocks_count = reserved_blocks; + ext2fs_mark_super_dirty(fs); + printf("Setting reserved blocks count to %lu\n", reserved_blocks); + } + if (s_flag == 1) { + if (sb->s_feature_ro_compat & + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) + bb_error_msg("\nThe filesystem already has sparse superblocks"); + else { + sb->s_feature_ro_compat |= + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; + sb->s_state &= ~EXT2_VALID_FS; + ext2fs_mark_super_dirty(fs); + printf("\nSparse superblock flag set. %s", please_fsck); + } + } + if (s_flag == 0) { + if (!(sb->s_feature_ro_compat & + EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) + bb_error_msg("\nThe filesystem already has sparse superblocks disabled"); + else { + sb->s_feature_ro_compat &= + ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; + sb->s_state &= ~EXT2_VALID_FS; + fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; + ext2fs_mark_super_dirty(fs); + printf("\nSparse superblock flag cleared. %s", please_fsck); + } + } + if (T_flag) { + sb->s_lastcheck = last_check_time; + ext2fs_mark_super_dirty(fs); + printf("Setting time filesystem last checked to %s\n", + ctime(&last_check_time)); + } + if (u_flag) { + sb->s_def_resuid = resuid; + ext2fs_mark_super_dirty(fs); + printf("Setting reserved blocks uid to %lu\n", resuid); + } + if (L_flag) { + if (strlen(new_label) > sizeof(sb->s_volume_name)) + bb_error_msg("Warning: label too long, truncating"); + memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); + safe_strncpy(sb->s_volume_name, new_label, + sizeof(sb->s_volume_name)); + ext2fs_mark_super_dirty(fs); + } + if (M_flag) { + memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); + safe_strncpy(sb->s_last_mounted, new_last_mounted, + sizeof(sb->s_last_mounted)); + ext2fs_mark_super_dirty(fs); + } + if (mntopts_cmd) + update_mntopts(fs, mntopts_cmd); + if (features_cmd) + update_feature_set(fs, features_cmd); + if (journal_size || journal_device) + add_journal(fs); + + if (U_flag) { + if ((strcasecmp(new_UUID, "null") == 0) || + (strcasecmp(new_UUID, "clear") == 0)) { + uuid_clear(sb->s_uuid); + } else if (strcasecmp(new_UUID, "time") == 0) { + uuid_generate_time(sb->s_uuid); + } else if (strcasecmp(new_UUID, "random") == 0) { + uuid_generate(sb->s_uuid); + } else if (uuid_parse(new_UUID, sb->s_uuid)) { + bb_error_msg_and_die("Invalid UUID format"); + } + ext2fs_mark_super_dirty(fs); + } + + if (l_flag) + list_super (sb); + return (ext2fs_close (fs) ? 1 : 0); +} |