/* vi: set sw=4 ts=4: */ /* * mke2fs.c - Make a ext2fs filesystem. * * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, * 2003, 2004, 2005 by Theodore Ts'o. * * Licensed under GPLv2, see file LICENSE in this source tree. */ /* Usage: mke2fs [options] device * * The device may be a block device or a image of one, but this isn't * enforced (but it's not much fun on a character device :-). */ #include <stdio.h> #include <string.h> #include <fcntl.h> #include <ctype.h> #include <time.h> #include <getopt.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> #include <mntent.h> #include <sys/ioctl.h> #include <sys/types.h> #include "e2fsbb.h" #include "ext2fs/ext2_fs.h" #include "uuid/uuid.h" #include "e2p/e2p.h" #include "ext2fs/ext2fs.h" #include "util.h" #define STRIDE_LENGTH 8 #ifndef __sparc__ #define ZAP_BOOTBLOCK #endif static const char * device_name; /* Command line options */ static int cflag; static int quiet; static int super_only; static int force; static int noaction; static int journal_size; static int journal_flags; static const char *bad_blocks_filename; static __u32 fs_stride; static struct ext2_super_block param; static char *creator_os; static char *volume_label; static char *mount_dir; static char *journal_device = NULL; static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */ static int sys_page_size = 4096; static int linux_version_code = 0; static int int_log2(int arg) { int l = 0; arg >>= 1; while (arg) { l++; arg >>= 1; } return l; } static int int_log10(unsigned int arg) { int l; for (l = 0; arg; l++) arg = arg / 10; return l; } /* * This function sets the default parameters for a filesystem * * The type is specified by the user. The size is the maximum size * (in megabytes) for which a set of parameters applies, with a size * of zero meaning that it is the default parameter for the type. * Note that order is important in the table below. */ #define DEF_MAX_BLOCKSIZE -1 static const char default_str[] = "default"; struct mke2fs_defaults { const char *type; int size; int blocksize; int inode_ratio; }; static const struct mke2fs_defaults settings[] = { { default_str, 0, 4096, 8192 }, { default_str, 512, 1024, 4096 }, { default_str, 3, 1024, 8192 }, { "journal", 0, 4096, 8192 }, { "news", 0, 4096, 4096 }, { "largefile", 0, 4096, 1024 * 1024 }, { "largefile4", 0, 4096, 4096 * 1024 }, { 0, 0, 0, 0}, }; static void set_fs_defaults(const char *fs_type, struct ext2_super_block *super, int blocksize, int sector_size, int *inode_ratio) { int megs; int ratio = 0; const struct mke2fs_defaults *p; int use_bsize = 1024; megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024; if (inode_ratio) ratio = *inode_ratio; if (!fs_type) fs_type = default_str; for (p = settings; p->type; p++) { if ((strcmp(p->type, fs_type) != 0) && (strcmp(p->type, default_str) != 0)) continue; if ((p->size != 0) && (megs > p->size)) continue; if (ratio == 0) *inode_ratio = p->inode_ratio < blocksize ? blocksize : p->inode_ratio; use_bsize = p->blocksize; } if (blocksize <= 0) { if (use_bsize == DEF_MAX_BLOCKSIZE) { use_bsize = sys_page_size; if ((linux_version_code < (2*65536 + 6*256)) && (use_bsize > 4096)) use_bsize = 4096; } if (sector_size && use_bsize < sector_size) use_bsize = sector_size; if ((blocksize < 0) && (use_bsize < (-blocksize))) use_bsize = -blocksize; blocksize = use_bsize; super->s_blocks_count /= blocksize / 1024; } super->s_log_frag_size = super->s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); } /* * Helper function for read_bb_file and test_disk */ static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk) { bb_error_msg("Bad block %u out of range; ignored", blk); } /* * Busybox stuff */ static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) { va_list ap; if (retval) { va_start(ap, fmt); fprintf(stderr, "\nCould not "); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); exit(EXIT_FAILURE); } } static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static void mke2fs_verbose(const char *fmt, ...) { va_list ap; if (!quiet) { va_start(ap, fmt); vfprintf(stdout, fmt, ap); fflush(stdout); va_end(ap); } } static void mke2fs_verbose_done(void) { mke2fs_verbose("done\n"); } static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3))); static void mke2fs_warning_msg(int retval, char *fmt, ... ) { va_list ap; if (retval) { va_start(ap, fmt); fprintf(stderr, "\nWarning: "); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); } } /* * Reads the bad blocks list from a file */ static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list, const char *bad_blocks_file) { FILE *f; errcode_t retval; f = xfopen_for_read(bad_blocks_file); retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); fclose (f); mke2fs_error_msg_and_die(retval, "read bad blocks from list"); } /* * Runs the badblocks program to test the disk */ static void test_disk(ext2_filsys fs, badblocks_list *bb_list) { FILE *f; errcode_t retval; char buf[1024]; sprintf(buf, "badblocks -b %u %s%s%s %d", fs->blocksize, quiet ? "" : "-s ", (cflag > 1) ? "-w " : "", fs->device_name, fs->super->s_blocks_count); mke2fs_verbose("Running command: %s\n", buf); f = popen(buf, "r"); if (!f) { bb_perror_msg_and_die("can't run '%s'", buf); } retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); pclose(f); mke2fs_error_msg_and_die(retval, "read bad blocks from program"); } static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list) { dgrp_t i; blk_t j; unsigned must_be_good; blk_t blk; badblocks_iterate bb_iter; errcode_t retval; blk_t group_block; int group; int group_bad; if (!bb_list) return; /* * The primary superblock and group descriptors *must* be * good; if not, abort. */ must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks; for (i = fs->super->s_first_data_block; i <= must_be_good; i++) { if (ext2fs_badblocks_list_test(bb_list, i)) { bb_error_msg_and_die( "Block %d in primary superblock/group descriptor area bad\n" "Blocks %d through %d must be good in order to build a filesystem\n" "Aborting ...", i, fs->super->s_first_data_block, must_be_good); } } /* * See if any of the bad blocks are showing up in the backup * superblocks and/or group descriptors. If so, issue a * warning and adjust the block counts appropriately. */ group_block = fs->super->s_first_data_block + fs->super->s_blocks_per_group; for (i = 1; i < fs->group_desc_count; i++) { group_bad = 0; for (j=0; j < fs->desc_blocks+1; j++) { if (ext2fs_badblocks_list_test(bb_list, group_block + j)) { mke2fs_warning_msg(!group_bad, "the backup superblock/group descriptors at block %d contain\n" "bad blocks\n", group_block); group_bad++; group = ext2fs_group_of_blk(fs, group_block+j); fs->group_desc[group].bg_free_blocks_count++; fs->super->s_free_blocks_count++; } } group_block += fs->super->s_blocks_per_group; } /* * Mark all the bad blocks as used... */ retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter); mke2fs_error_msg_and_die(retval, "mark bad blocks as used"); while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) ext2fs_mark_block_bitmap(fs->block_map, blk); ext2fs_badblocks_list_iterate_end(bb_iter); } /* * These functions implement a generalized progress meter. */ struct progress_struct { char format[20]; char backup[80]; __u32 max; int skip_progress; }; static void progress_init(struct progress_struct *progress, const char *label,__u32 max) { int i; memset(progress, 0, sizeof(struct progress_struct)); if (quiet) return; /* * Figure out how many digits we need */ i = int_log10(max); sprintf(progress->format, "%%%dd/%%%dld", i, i); memset(progress->backup, '\b', sizeof(progress->backup)-1); progress->backup[sizeof(progress->backup)-1] = 0; if ((2*i)+1 < (int) sizeof(progress->backup)) progress->backup[(2*i)+1] = 0; progress->max = max; progress->skip_progress = 0; if (getenv("MKE2FS_SKIP_PROGRESS")) progress->skip_progress++; fputs(label, stdout); fflush(stdout); } static void progress_update(struct progress_struct *progress, __u32 val) { if ((progress->format[0] == 0) || progress->skip_progress) return; printf(progress->format, val, progress->max); fputs(progress->backup, stdout); } static void progress_close(struct progress_struct *progress) { if (progress->format[0] == 0) return; printf("%-28s\n", "done"); } /* * Helper function which zeros out _num_ blocks starting at _blk_. In * case of an error, the details of the error is returned via _ret_blk_ * and _ret_count_ if they are non-NULL pointers. Returns 0 on * success, and an error code on an error. * * As a special case, if the first argument is NULL, then it will * attempt to free the static zeroizing buffer. (This is to keep * programs that check for memory leaks happy.) */ static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num, struct progress_struct *progress, blk_t *ret_blk, int *ret_count) { int j, count, next_update; static char *buf; errcode_t retval; /* If fs is null, clean up the static buffer and return */ if (!fs) { if (buf) { free(buf); buf = 0; } return 0; } /* Allocate the zeroizing buffer if necessary */ if (!buf) { buf = xzalloc(fs->blocksize * STRIDE_LENGTH); } /* OK, do the write loop */ next_update = 0; for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) { count = num - j; if (count > STRIDE_LENGTH) count = STRIDE_LENGTH; retval = io_channel_write_blk(fs->io, blk, count, buf); if (retval) { if (ret_count) *ret_count = count; if (ret_blk) *ret_blk = blk; return retval; } if (progress && j > next_update) { next_update += num / 100; progress_update(progress, blk); } } return 0; } static void write_inode_tables(ext2_filsys fs) { errcode_t retval; blk_t blk; dgrp_t i; int num; struct progress_struct progress; if (quiet) memset(&progress, 0, sizeof(progress)); else progress_init(&progress, "Writing inode tables: ", fs->group_desc_count); for (i = 0; i < fs->group_desc_count; i++) { progress_update(&progress, i); blk = fs->group_desc[i].bg_inode_table; num = fs->inode_blocks_per_group; retval = zero_blocks(fs, blk, num, 0, &blk, &num); mke2fs_error_msg_and_die(retval, "write %d blocks in inode table starting at %d.", num, blk); if (sync_kludge) { if (sync_kludge == 1) sync(); else if ((i % sync_kludge) == 0) sync(); } } zero_blocks(0, 0, 0, 0, 0, 0); progress_close(&progress); } static void create_root_dir(ext2_filsys fs) { errcode_t retval; struct ext2_inode inode; retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0); mke2fs_error_msg_and_die(retval, "create root dir"); if (geteuid()) { retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode); mke2fs_error_msg_and_die(retval, "read root inode"); inode.i_uid = getuid(); if (inode.i_uid) inode.i_gid = getgid(); retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); mke2fs_error_msg_and_die(retval, "set root inode ownership"); } } static void create_lost_and_found(ext2_filsys fs) { errcode_t retval; ext2_ino_t ino; const char *name = "lost+found"; int i = 1; char *msg = "create"; int lpf_size = 0; fs->umask = 077; retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name); if (retval) { goto CREATE_LOST_AND_FOUND_ERROR; } retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino); if (retval) { msg = "lookup"; goto CREATE_LOST_AND_FOUND_ERROR; } for (; i < EXT2_NDIR_BLOCKS; i++) { if ((lpf_size += fs->blocksize) >= 16*1024) break; retval = ext2fs_expand_dir(fs, ino); msg = "expand"; CREATE_LOST_AND_FOUND_ERROR: mke2fs_error_msg_and_die(retval, "%s %s", msg, name); } } static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list) { errcode_t retval; ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO); fs->group_desc[0].bg_free_inodes_count--; fs->super->s_free_inodes_count--; retval = ext2fs_update_bb_inode(fs, bb_list); mke2fs_error_msg_and_die(retval, "set bad block inode"); } static void reserve_inodes(ext2_filsys fs) { ext2_ino_t i; int group; for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) { ext2fs_mark_inode_bitmap(fs->inode_map, i); group = ext2fs_group_of_ino(fs, i); fs->group_desc[group].bg_free_inodes_count--; fs->super->s_free_inodes_count--; } ext2fs_mark_ib_dirty(fs); } #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ #define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */ #define BSD_LABEL_OFFSET 64 static void zap_sector(ext2_filsys fs, int sect, int nsect) { char *buf; char *fmt = "could not %s %d"; int retval; unsigned int *magic; buf = xmalloc(512*nsect); if (sect == 0) { /* Check for a BSD disklabel, and don't erase it if so */ retval = io_channel_read_blk(fs->io, 0, -512, buf); if (retval) mke2fs_warning_msg(retval, fmt, "read block", 0); else { magic = (unsigned int *) (buf + BSD_LABEL_OFFSET); if ((*magic == BSD_DISKMAGIC) || (*magic == BSD_MAGICDISK)) return; } } memset(buf, 0, 512*nsect); io_channel_set_blksize(fs->io, 512); retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf); io_channel_set_blksize(fs->io, fs->blocksize); free(buf); mke2fs_warning_msg(retval, fmt, "erase sector", sect); } static void create_journal_dev(ext2_filsys fs) { struct progress_struct progress; errcode_t retval; char *buf; char *fmt = "%s journal superblock"; blk_t blk; int count; retval = ext2fs_create_journal_superblock(fs, fs->super->s_blocks_count, 0, &buf); mke2fs_error_msg_and_die(retval, fmt, "init"); if (quiet) memset(&progress, 0, sizeof(progress)); else progress_init(&progress, "Zeroing journal device: ", fs->super->s_blocks_count); retval = zero_blocks(fs, 0, fs->super->s_blocks_count, &progress, &blk, &count); mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)", blk, count); zero_blocks(0, 0, 0, 0, 0, 0); retval = io_channel_write_blk(fs->io, fs->super->s_first_data_block+1, 1, buf); mke2fs_error_msg_and_die(retval, fmt, "write"); progress_close(&progress); } static void show_stats(ext2_filsys fs) { struct ext2_super_block *s = fs->super; char *os; blk_t group_block; dgrp_t i; int need, col_left; mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count), "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count); os = e2p_os2string(fs->super->s_creator_os); printf( "Filesystem label=%.*s\n" "OS type: %s\n" "Block size=%u (log=%u)\n" "Fragment size=%u (log=%u)\n" "%u inodes, %u blocks\n" "%u blocks (%2.2f%%) reserved for the super user\n" "First data block=%u\n", (int) sizeof(s->s_volume_name), s->s_volume_name, os, fs->blocksize, s->s_log_block_size, fs->fragsize, s->s_log_frag_size, s->s_inodes_count, s->s_blocks_count, s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count, s->s_first_data_block); free(os); if (s->s_reserved_gdt_blocks) { printf("Maximum filesystem blocks=%lu\n", (s->s_reserved_gdt_blocks + fs->desc_blocks) * (fs->blocksize / sizeof(struct ext2_group_desc)) * s->s_blocks_per_group); } printf( "%u block group%s\n" "%u blocks per group, %u fragments per group\n" "%u inodes per group\n", fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "", s->s_blocks_per_group, s->s_frags_per_group, s->s_inodes_per_group); if (fs->group_desc_count == 1) { bb_putchar('\n'); return; } printf("Superblock backups stored on blocks: "); group_block = s->s_first_data_block; col_left = 0; for (i = 1; i < fs->group_desc_count; i++) { group_block += s->s_blocks_per_group; if (!ext2fs_bg_has_super(fs, i)) continue; if (i != 1) printf(", "); need = int_log10(group_block) + 2; if (need > col_left) { printf("\n\t"); col_left = 72; } col_left -= need; printf("%u", group_block); } puts("\n"); } /* * Set the S_CREATOR_OS field. Return true if OS is known, * otherwise, 0. */ static int set_os(struct ext2_super_block *sb, char *os) { if (isdigit (*os)) { sb->s_creator_os = atoi(os); return 1; } if ((sb->s_creator_os = e2p_string2os(os)) >= 0) { return 1; } else if (!strcasecmp("GNU", os)) { sb->s_creator_os = EXT2_OS_HURD; return 1; } return 0; } static void parse_extended_opts(struct ext2_super_block *sb_param, const char *opts) { char *buf, *token, *next, *p, *arg; int r_usage = 0; buf = xstrdup(opts); for (token = buf; token && *token; token = next) { p = strchr(token, ','); next = 0; if (p) { *p = 0; next = p+1; } arg = strchr(token, '='); if (arg) { *arg = 0; arg++; } if (strcmp(token, "stride") == 0) { if (!arg) { r_usage++; continue; } fs_stride = strtoul(arg, &p, 0); if (*p || (fs_stride == 0)) { bb_error_msg("Invalid stride parameter: %s", arg); r_usage++; continue; } } else if (!strcmp(token, "resize")) { unsigned long resize, bpg, rsv_groups; unsigned long group_desc_count, desc_blocks; unsigned int gdpb, blocksize; int rsv_gdb; if (!arg) { r_usage++; continue; } resize = parse_num_blocks(arg, sb_param->s_log_block_size); if (resize == 0) { bb_error_msg("Invalid resize parameter: %s", arg); r_usage++; continue; } if (resize <= sb_param->s_blocks_count) { bb_error_msg("The resize maximum must be greater " "than the filesystem size"); r_usage++; continue; } blocksize = EXT2_BLOCK_SIZE(sb_param); bpg = sb_param->s_blocks_per_group; if (!bpg) bpg = blocksize * 8; gdpb = blocksize / sizeof(struct ext2_group_desc); group_desc_count = (sb_param->s_blocks_count + bpg - 1) / bpg; desc_blocks = (group_desc_count + gdpb - 1) / gdpb; rsv_groups = (resize + bpg - 1) / bpg; rsv_gdb = (rsv_groups + gdpb - 1) / gdpb - desc_blocks; if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param)) rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param); if (rsv_gdb > 0) { sb_param->s_feature_compat |= EXT2_FEATURE_COMPAT_RESIZE_INO; sb_param->s_reserved_gdt_blocks = rsv_gdb; } } else r_usage++; } if (r_usage) { bb_error_msg_and_die( "\nBad options specified.\n\n" "Extended options are separated by commas, " "and may take an argument which\n" "\tis set off by an equals ('=') sign.\n\n" "Valid extended options are:\n" "\tstride=<stride length in blocks>\n" "\tresize=<resize maximum size in blocks>\n"); } } static __u32 ok_features[3] = { EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_RESIZE_INO | EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */ EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV| EXT2_FEATURE_INCOMPAT_META_BG, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */ }; static int PRS(int argc, char **argv) { int c; int size; char * tmp; int blocksize = 0; int inode_ratio = 0; int inode_size = 0; int reserved_ratio = 5; int sector_size = 0; int show_version_only = 0; ext2_ino_t num_inodes = 0; errcode_t retval; char * extended_opts = NULL; const char * fs_type = NULL; blk_t dev_size; long sysval; /* Update our PATH to include /sbin */ e2fs_set_sbin_path(); tmp = getenv("MKE2FS_SYNC"); if (tmp) sync_kludge = atoi(tmp); /* Determine the system page size if possible */ #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE)) #define _SC_PAGESIZE _SC_PAGE_SIZE #endif #ifdef _SC_PAGESIZE sysval = sysconf(_SC_PAGESIZE); if (sysval > 0) sys_page_size = sysval; #endif /* _SC_PAGESIZE */ setbuf(stdout, NULL); setbuf(stderr, NULL); memset(¶m, 0, sizeof(struct ext2_super_block)); param.s_rev_level = 1; /* Create revision 1 filesystems now */ param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE; param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; #ifdef __linux__ linux_version_code = get_linux_version_code(); if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) { param.s_rev_level = 0; param.s_feature_incompat = 0; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } #endif /* If called as mkfs.ext3, create a journal inode */ if (last_char_is(applet_name, '3')) journal_size = -1; while ((c = getopt (argc, argv, "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) { switch (c) { case 'b': blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); mke2fs_warning_msg((blocksize > 4096), "blocksize %d not usable on most systems", blocksize); param.s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); break; case 'c': /* Check for bad blocks */ case 't': /* deprecated */ cflag++; break; case 'f': size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); param.s_log_frag_size = int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE); mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option"); break; case 'g': param.s_blocks_per_group = xatou32(optarg); if ((param.s_blocks_per_group % 8) != 0) { bb_error_msg_and_die("blocks per group must be multiple of 8"); } break; case 'i': /* Huh? is "* 1024" correct? */ inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024); break; case 'J': parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); break; case 'j': param.s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; if (!journal_size) journal_size = -1; break; case 'l': bad_blocks_filename = optarg; break; case 'm': reserved_ratio = xatou_range(optarg, 0, 50); break; case 'n': noaction++; break; case 'o': creator_os = optarg; break; case 'r': param.s_rev_level = xatoi_positive(optarg); if (param.s_rev_level == EXT2_GOOD_OLD_REV) { param.s_feature_incompat = 0; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } break; case 's': /* deprecated */ if (xatou(optarg)) param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; else param.s_feature_ro_compat &= ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; break; #ifdef EXT2_DYNAMIC_REV case 'I': inode_size = xatoi_positive(optarg); break; #endif case 'N': num_inodes = xatoi_positive(optarg); break; case 'v': quiet = 0; break; case 'q': quiet = 1; break; case 'F': force = 1; break; case 'L': volume_label = optarg; break; case 'M': mount_dir = optarg; break; case 'O': if (!strcmp(optarg, "none")) { param.s_feature_compat = 0; param.s_feature_incompat = 0; param.s_feature_ro_compat = 0; break; } if (e2p_edit_feature(optarg, ¶m.s_feature_compat, ok_features)) { bb_error_msg_and_die("Invalid filesystem option set: %s", optarg); } break; case 'E': case 'R': extended_opts = optarg; break; case 'S': super_only = 1; break; case 'T': fs_type = optarg; break; case 'V': /* Print version number and exit */ show_version_only = 1; quiet = 0; break; default: bb_show_usage(); } } if ((optind == argc) /*&& !show_version_only*/) bb_show_usage(); device_name = argv[optind++]; mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); if (show_version_only) { return 0; } /* * If there's no blocksize specified and there is a journal * device, use it to figure out the blocksize */ if (blocksize <= 0 && journal_device) { ext2_filsys jfs; io_manager io_ptr; #ifdef CONFIG_TESTIO_DEBUG io_ptr = test_io_manager; test_io_backing_manager = unix_io_manager; #else io_ptr = unix_io_manager; #endif retval = ext2fs_open(journal_device, EXT2_FLAG_JOURNAL_DEV_OK, 0, 0, io_ptr, &jfs); mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device); if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) { bb_error_msg_and_die( "Journal dev blocksize (%d) smaller than " "minimum blocksize %d\n", jfs->blocksize, -blocksize); } blocksize = jfs->blocksize; param.s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); ext2fs_close(jfs); } if (blocksize > sys_page_size) { mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)", blocksize, sys_page_size); if (!force) { proceed_question(); } bb_error_msg("Forced to continue"); } mke2fs_warning_msg(((blocksize > 4096) && (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)), "some 2.4 kernels do not support " "blocksizes greater than 4096 using ext3.\n" "Use -b 4096 if this is an issue for you\n"); if (optind < argc) { param.s_blocks_count = parse_num_blocks(argv[optind++], param.s_log_block_size); mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]); } if (optind < argc) bb_show_usage(); if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { if (!fs_type) fs_type = "journal"; reserved_ratio = 0; param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } if (param.s_rev_level == EXT2_GOOD_OLD_REV && (param.s_feature_compat || param.s_feature_ro_compat || param.s_feature_incompat)) param.s_rev_level = 1; /* Create a revision 1 filesystem */ check_plausibility(device_name , force); check_mount(device_name, force, "filesystem"); param.s_log_frag_size = param.s_log_block_size; if (noaction && param.s_blocks_count) { dev_size = param.s_blocks_count; retval = 0; } else { retry: retval = ext2fs_get_device_size(device_name, EXT2_BLOCK_SIZE(¶m), &dev_size); if ((retval == EFBIG) && (blocksize == 0) && (param.s_log_block_size == 0)) { param.s_log_block_size = 2; blocksize = 4096; goto retry; } } mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size"); if (!param.s_blocks_count) { if (retval == EXT2_ET_UNIMPLEMENTED) { mke2fs_error_msg_and_die(1, "determine device size; you " "must specify\nthe size of the " "filesystem"); } else { if (dev_size == 0) { bb_error_msg_and_die( "Device size reported to be zero. " "Invalid partition specified, or\n\t" "partition table wasn't reread " "after running fdisk, due to\n\t" "a modified partition being busy " "and in use. You may need to reboot\n\t" "to re-read your partition table.\n" ); } param.s_blocks_count = dev_size; if (sys_page_size > EXT2_BLOCK_SIZE(¶m)) param.s_blocks_count &= ~((sys_page_size / EXT2_BLOCK_SIZE(¶m))-1); } } else if (!force && (param.s_blocks_count > dev_size)) { bb_error_msg("Filesystem larger than apparent device size"); proceed_question(); } /* * If the user asked for HAS_JOURNAL, then make sure a journal * gets created. */ if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && !journal_size) journal_size = -1; /* Set first meta blockgroup via an environment variable */ /* (this is mostly for debugging purposes) */ if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) && ((tmp = getenv("MKE2FS_FIRST_META_BG")))) param.s_first_meta_bg = atoi(tmp); /* Get the hardware sector size, if available */ retval = ext2fs_get_device_sectsize(device_name, §or_size); mke2fs_error_msg_and_die(retval, "determine hardware sector size"); if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL) sector_size = atoi(tmp); set_fs_defaults(fs_type, ¶m, blocksize, sector_size, &inode_ratio); blocksize = EXT2_BLOCK_SIZE(¶m); if (extended_opts) parse_extended_opts(¶m, extended_opts); /* Since sparse_super is the default, we would only have a problem * here if it was explicitly disabled. */ if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO) && !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) { bb_error_msg_and_die("reserved online resize blocks not supported " "on non-sparse filesystem"); } if (param.s_blocks_per_group) { if (param.s_blocks_per_group < 256 || param.s_blocks_per_group > 8 * (unsigned) blocksize) { bb_error_msg_and_die("blocks per group count out of range"); } } if (!force && param.s_blocks_count >= (1 << 31)) { bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n" "\t (8TB using a blocksize of 4k) are currently supported."); } if (inode_size) { if (inode_size < EXT2_GOOD_OLD_INODE_SIZE || inode_size > EXT2_BLOCK_SIZE(¶m) || inode_size & (inode_size - 1)) { bb_error_msg_and_die("invalid inode size %d (min %d/max %d)", inode_size, EXT2_GOOD_OLD_INODE_SIZE, blocksize); } mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE), "%d-byte inodes not usable on most systems", inode_size); param.s_inode_size = inode_size; } /* * Calculate number of inodes based on the inode ratio */ param.s_inodes_count = num_inodes ? num_inodes : ((__u64) param.s_blocks_count * blocksize) / inode_ratio; /* * Calculate number of blocks to reserve */ param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100; return 1; } static void mke2fs_clean_up(void) { if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); } int mke2fs_main (int argc, char **argv); int mke2fs_main (int argc, char **argv) { errcode_t retval; ext2_filsys fs; badblocks_list bb_list = 0; unsigned int i; int val; io_manager io_ptr; if (ENABLE_FEATURE_CLEAN_UP) atexit(mke2fs_clean_up); if (!PRS(argc, argv)) return 0; #ifdef CONFIG_TESTIO_DEBUG io_ptr = test_io_manager; test_io_backing_manager = unix_io_manager; #else io_ptr = unix_io_manager; #endif /* * Initialize the superblock.... */ retval = ext2fs_initialize(device_name, 0, ¶m, io_ptr, &fs); mke2fs_error_msg_and_die(retval, "set up superblock"); /* * Wipe out the old on-disk superblock */ if (!noaction) zap_sector(fs, 2, 6); /* * Generate a UUID for it... */ uuid_generate(fs->super->s_uuid); /* * Initialize the directory index variables */ fs->super->s_def_hash_version = EXT2_HASH_TEA; uuid_generate((unsigned char *) fs->super->s_hash_seed); /* * Add "jitter" to the superblock's check interval so that we * don't check all the filesystems at the same time. We use a * kludgy hack of using the UUID to derive a random jitter value. */ for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++) val += fs->super->s_uuid[i]; fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT; /* * Override the creator OS, if applicable */ if (creator_os && !set_os(fs->super, creator_os)) { bb_error_msg_and_die("unknown os - %s", creator_os); } /* * For the Hurd, we will turn off filetype since it doesn't * support it. */ if (fs->super->s_creator_os == EXT2_OS_HURD) fs->super->s_feature_incompat &= ~EXT2_FEATURE_INCOMPAT_FILETYPE; /* * Set the volume label... */ if (volume_label) { snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label); } /* * Set the last mount directory */ if (mount_dir) { snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir); } if (!quiet || noaction) show_stats(fs); if (noaction) return 0; if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { create_journal_dev(fs); return (ext2fs_close(fs) ? 1 : 0); } if (bad_blocks_filename) read_bb_file(fs, &bb_list, bad_blocks_filename); if (cflag) test_disk(fs, &bb_list); handle_bad_blocks(fs, bb_list); fs->stride = fs_stride; retval = ext2fs_allocate_tables(fs); mke2fs_error_msg_and_die(retval, "allocate filesystem tables"); if (super_only) { fs->super->s_state |= EXT2_ERROR_FS; fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY); } else { /* rsv must be a power of two (64kB is MD RAID sb alignment) */ unsigned int rsv = 65536 / fs->blocksize; unsigned long blocks = fs->super->s_blocks_count; unsigned long start; blk_t ret_blk; #ifdef ZAP_BOOTBLOCK zap_sector(fs, 0, 2); #endif /* * Wipe out any old MD RAID (or other) metadata at the end * of the device. This will also verify that the device is * as large as we think. Be careful with very small devices. */ start = (blocks & ~(rsv - 1)); if (start > rsv) start -= rsv; if (start > 0) retval = zero_blocks(fs, start, blocks - start, NULL, &ret_blk, NULL); mke2fs_warning_msg(retval, "can't zero block %u at end of filesystem", ret_blk); write_inode_tables(fs); create_root_dir(fs); create_lost_and_found(fs); reserve_inodes(fs); create_bad_block_inode(fs, bb_list); if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO) { retval = ext2fs_create_resize_inode(fs); mke2fs_error_msg_and_die(retval, "reserve blocks for online resize"); } } if (journal_device) { make_journal_device(journal_device, fs, quiet, force); } else if (journal_size) { make_journal_blocks(fs, journal_size, journal_flags, quiet); } mke2fs_verbose("Writing superblocks and filesystem accounting information: "); retval = ext2fs_flush(fs); mke2fs_warning_msg(retval, "had trouble writing out superblocks"); mke2fs_verbose_done(); if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG")) print_check_message(fs); val = ext2fs_close(fs); return (retval || val) ? 1 : 0; }