/* 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. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */ /* * 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); }