X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=util-linux%2Fmkfs_minix.c;h=0dfe34705213a88948704c0b832a921cb0236645;hb=52a515d18724bbb34e3ccbbb0218efcc4eccc0a8;hp=240dfded0349e482f32c380924bc272e187acecb;hpb=bc0aed79a8c7bb24c32a21533893fdad660b7292;p=oweals%2Fbusybox.git diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c index 240dfded0..0dfe34705 100644 --- a/util-linux/mkfs_minix.c +++ b/util-linux/mkfs_minix.c @@ -2,8 +2,9 @@ /* * mkfs.c - make a linux (minix) file-system. * - * (C) 1991 Linus Torvalds. This file may be redistributed as per - * the Linux copyright. + * (C) 1991 Linus Torvalds. + * + * Licensed under GPLv2, see file LICENSE in this source tree. */ /* @@ -33,9 +34,9 @@ * 03.01.94 - Added support for file system valid flag. * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu) * - * 30.10.94 - added support for v2 filesystem - * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) - * + * 30.10.94 - added support for v2 filesystem + * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) + * * 09.11.94 - Added test to prevent overwrite of mounted fs adapted * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs * program. (Daniel Quinlan, quinlan@yggdrasil.com) @@ -49,345 +50,226 @@ * * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks] * - * -c for readablility checking (SLOW!) + * -c for readability checking (SLOW!) * -l for getting a list of bad blocks from a file. * -n for namelength (currently the kernel only uses 14 or 30) * -i for number of inodes * -v for v2 filesystem * * 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 :-). + * enforced (but it's not much fun on a character device :-). * * Modified for BusyBox by Erik Andersen -- * removed getopt based parser and added a hand rolled one. */ - -#include "internal.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include +//config:config MKFS_MINIX +//config: bool "mkfs_minix" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: The minix filesystem is a nice, small, compact, read-write filesystem +//config: with little overhead. If you wish to be able to create minix +//config: filesystems this utility will do the job for you. +//config: +//config:config FEATURE_MINIX2 +//config: bool "Support Minix fs v2 (fsck_minix/mkfs_minix)" +//config: default y +//config: depends on FSCK_MINIX || MKFS_MINIX +//config: help +//config: If you wish to be able to create version 2 minix filesystems, enable +//config: this. If you enabled 'mkfs_minix' then you almost certainly want to +//config: be using the version 2 filesystem support. + +// APPLET_ODDNAME:name main location suid_type help +//applet:IF_MKFS_MINIX(APPLET_ODDNAME(mkfs.minix, mkfs_minix, BB_DIR_SBIN, BB_SUID_DROP, mkfs_minix)) + +//kbuild:lib-$(CONFIG_MKFS_MINIX) += mkfs_minix.o + +//usage:#define mkfs_minix_trivial_usage +//usage: "[-c | -l FILE] [-nXX] [-iXX] BLOCKDEV [KBYTES]" +//usage:#define mkfs_minix_full_usage "\n\n" +//usage: "Make a MINIX filesystem\n" +//usage: "\n -c Check device for bad blocks" +//usage: "\n -n [14|30] Maximum length of filenames" +//usage: "\n -i INODES Number of inodes for the filesystem" +//usage: "\n -l FILE Read bad blocks list from FILE" +//usage: "\n -v Make version 2 filesystem" + +#include "libbb.h" #include +#include "minix.h" -typedef unsigned char u8; -typedef unsigned short u16; -typedef unsigned int u32; - - -#define MINIX_ROOT_INO 1 -#define MINIX_LINK_MAX 250 -#define MINIX2_LINK_MAX 65530 - -#define MINIX_I_MAP_SLOTS 8 -#define MINIX_Z_MAP_SLOTS 64 -#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */ -#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */ -#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */ -#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */ -#define MINIX_VALID_FS 0x0001 /* Clean fs. */ -#define MINIX_ERROR_FS 0x0002 /* fs has errors. */ - -#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) -#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) - -#define MINIX_V1 0x0001 /* original minix fs */ -#define MINIX_V2 0x0002 /* minix V2 fs */ - -#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version - -/* - * This is the original minix inode layout on disk. - * Note the 8-bit gid and atime and ctime. - */ -struct minix_inode { - u16 i_mode; - u16 i_uid; - u32 i_size; - u32 i_time; - u8 i_gid; - u8 i_nlinks; - u16 i_zone[9]; -}; - -/* - * The new minix inode has all the time entries, as well as - * long block numbers and a third indirect block (7+1+1+1 - * instead of 7+1+1). Also, some previously 8-bit values are - * now 16-bit. The inode is now 64 bytes instead of 32. - */ -struct minix2_inode { - u16 i_mode; - u16 i_nlinks; - u16 i_uid; - u16 i_gid; - u32 i_size; - u32 i_atime; - u32 i_mtime; - u32 i_ctime; - u32 i_zone[10]; -}; - -/* - * minix super-block data on disk - */ -struct minix_super_block { - u16 s_ninodes; - u16 s_nzones; - u16 s_imap_blocks; - u16 s_zmap_blocks; - u16 s_firstdatazone; - u16 s_log_zone_size; - u32 s_max_size; - u16 s_magic; - u16 s_state; - u32 s_zones; -}; - -struct minix_dir_entry { - u16 inode; - char name[0]; -}; - -#define BLOCK_SIZE_BITS 10 -#define BLOCK_SIZE (1<> 1]; + unsigned short dind_block1[BLOCK_SIZE >> 1]; + unsigned long ind_block2[BLOCK_SIZE >> 2]; + unsigned long dind_block2[BLOCK_SIZE >> 2]; +}; +#define G (*ptr_to_globals) +#define INIT_G() do { \ + SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ +} while (0) - suggestion, Sun Nov 21 08:05:07 1993) */ -static int dirsize = 32; -static int magic = MINIX_SUPER_MAGIC2; -static int version2 = 0; +static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) +{ + return (size + n-1) / n; +} -static char root_block[BLOCK_SIZE] = "\0"; +#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1) +#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1) -static char *inode_buffer = NULL; +#define SB (*(struct minix_superblock*)G.superblock_buffer) -#define Inode (((struct minix_inode *) inode_buffer)-1) -#ifdef BB_FEATURE_MINIX2 -#define Inode2 (((struct minix2_inode *) inode_buffer)-1) -#endif -static char super_block_buffer[BLOCK_SIZE]; -static char boot_block_buffer[512]; +#define SB_INODES (SB.s_ninodes) +#define SB_IMAPS (SB.s_imap_blocks) +#define SB_ZMAPS (SB.s_zmap_blocks) +#define SB_FIRSTZONE (SB.s_firstdatazone) +#define SB_ZONE_SIZE (SB.s_log_zone_size) +#define SB_MAXSIZE (SB.s_max_size) +#define SB_MAGIC (SB.s_magic) -#define Super (*(struct minix_super_block *)super_block_buffer) -#define INODES ((unsigned long)Super.s_ninodes) -#ifdef BB_FEATURE_MINIX2 -#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones)) +#if !ENABLE_FEATURE_MINIX2 +# define SB_ZONES (SB.s_nzones) +# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK) #else -#define ZONES ((unsigned long)(Super.s_nzones)) +# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones) +# define INODE_BLOCKS div_roundup(SB_INODES, \ + (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) #endif -#define IMAPS ((unsigned long)Super.s_imap_blocks) -#define ZMAPS ((unsigned long)Super.s_zmap_blocks) -#define FIRSTZONE ((unsigned long)Super.s_firstdatazone) -#define ZONESIZE ((unsigned long)Super.s_log_zone_size) -#define MAXSIZE ((unsigned long)Super.s_max_size) -#define MAGIC (Super.s_magic) -#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS) - -static char *inode_map; -static char *zone_map; -static unsigned short good_blocks_table[MAX_GOOD_BLOCKS]; -static int used_good_blocks = 0; -static unsigned long req_nr_inodes = 0; +#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) +#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS) -#define inode_in_use(x) (isset(inode_map,(x))) -#define zone_in_use(x) (isset(zone_map,(x)-FIRSTZONE+1)) +/* Before you ask "where they come from?": */ +/* setbit/clrbit are supplied by sys/param.h */ -#define mark_inode(x) (setbit(inode_map,(x))) -#define unmark_inode(x) (clrbit(inode_map,(x))) - -#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1)) -#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1)) - -/* - * Volatile to let gcc know that this doesn't return. When trying - * to compile this under minix, volatile gives a warning, as - * exit() isn't defined as volatile under minix. - */ -static volatile void die(char *str) +static int minix_bit(const char* a, unsigned i) { - errorMsg("%s\n", str); - exit(8); + return a[i >> 3] & (1<<(i & 7)); } -static volatile void show_usage() __attribute__ ((noreturn)); -static volatile void show_usage() +static void minix_setbit(char *a, unsigned i) { - usage(mkfs_minix_usage); + setbit(a, i); } - -/* - * Check to make certain that our new filesystem won't be created on - * an already mounted partition. Code adapted from mke2fs, Copyright - * (C) 1994 Theodore Ts'o. Also licensed under GPL. - */ -static void check_mount(void) +static void minix_clrbit(char *a, unsigned i) { - FILE *f; - struct mntent *mnt; + clrbit(a, i); +} - if ((f = setmntent(MOUNTED, "r")) == NULL) - return; - while ((mnt = getmntent(f)) != NULL) - if (strcmp(device_name, mnt->mnt_fsname) == 0) - break; - endmntent(f); - if (!mnt) - return; +/* Note: do not assume 0/1, it is 0/nonzero */ +#define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1) +/*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/ - die("%s is mounted; will not make a filesystem here!"); -} +#define mark_inode(x) minix_setbit(G.inode_map,(x)) +#define unmark_inode(x) minix_clrbit(G.inode_map,(x)) +#define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1) +#define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1) -static long valid_offset(int fd, int offset) +#ifndef BLKGETSIZE +# define BLKGETSIZE _IO(0x12,96) /* return device size */ +#endif + +static void write_tables(void) { - char ch; + /* Mark the superblock valid. */ + SB.s_state |= MINIX_VALID_FS; + SB.s_state &= ~MINIX_ERROR_FS; - if (lseek(fd, offset, 0) < 0) - return 0; - if (read(fd, &ch, 1) < 1) - return 0; - return 1; -} + msg_eol = "seek to 0 failed"; + xlseek(dev_fd, 0, SEEK_SET); -static int count_blocks(int fd) -{ - int high, low; - - low = 0; - for (high = 1; valid_offset(fd, high); high *= 2) - low = high; - while (low < high - 1) { - const int mid = (low + high) / 2; - - if (valid_offset(fd, mid)) - low = mid; - else - high = mid; - } - valid_offset(fd, 0); - return (low + 1); -} + msg_eol = "can't clear boot sector"; + xwrite(dev_fd, G.boot_block_buffer, 512); -static int get_size(const char *file) -{ - int fd; - long size; + msg_eol = "seek to BLOCK_SIZE failed"; + xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); - fd = open(file, O_RDWR); - if (fd < 0) { - perror(file); - exit(1); - } - if (ioctl(fd, BLKGETSIZE, &size) >= 0) { - close(fd); - return (size * 512); - } + msg_eol = "can't write superblock"; + xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE); - size = count_blocks(fd); - close(fd); - return size; -} + msg_eol = "can't write inode map"; + xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE); -static void write_tables(void) -{ - /* Mark the super block valid. */ - Super.s_state |= MINIX_VALID_FS; - Super.s_state &= ~MINIX_ERROR_FS; - - if (lseek(DEV, 0, SEEK_SET)) - die("seek to boot block failed in write_tables"); - if (512 != write(DEV, boot_block_buffer, 512)) - die("unable to clear boot sector"); - if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET)) - die("seek failed in write_tables"); - if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE)) - die("unable to write super-block"); - if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE)) - die("unable to write inode map"); - if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE)) - die("unable to write zone map"); - if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE)) - die("unable to write inodes"); + msg_eol = "can't write zone map"; + xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE); + + msg_eol = "can't write inodes"; + xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE); + msg_eol = "\n"; } static void write_block(int blk, char *buffer) { - if (blk * BLOCK_SIZE != lseek(DEV, blk * BLOCK_SIZE, SEEK_SET)) - die("seek failed in write_block"); - if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE)) - die("write failed in write_block"); + xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET); + xwrite(dev_fd, buffer, BLOCK_SIZE); } static int get_free_block(void) { int blk; - if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS) - die("too many bad blocks"); - if (used_good_blocks) - blk = good_blocks_table[used_good_blocks - 1] + 1; + if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS) + bb_error_msg_and_die("too many bad blocks"); + if (G.used_good_blocks) + blk = G.good_blocks_table[G.used_good_blocks - 1] + 1; else - blk = FIRSTZONE; - while (blk < ZONES && zone_in_use(blk)) + blk = SB_FIRSTZONE; + while (blk < SB_ZONES && zone_in_use(blk)) blk++; - if (blk >= ZONES) - die("not enough good blocks"); - good_blocks_table[used_good_blocks] = blk; - used_good_blocks++; + if (blk >= SB_ZONES) + bb_error_msg_and_die("not enough good blocks"); + G.good_blocks_table[G.used_good_blocks] = blk; + G.used_good_blocks++; return blk; } @@ -395,15 +277,15 @@ static void mark_good_blocks(void) { int blk; - for (blk = 0; blk < used_good_blocks; blk++) - mark_zone(good_blocks_table[blk]); + for (blk = 0; blk < G.used_good_blocks; blk++) + mark_zone(G.good_blocks_table[blk]); } -inline int next(int zone) +static int next(int zone) { if (!zone) - zone = FIRSTZONE - 1; - while (++zone < ZONES) + zone = SB_FIRSTZONE - 1; + while (++zone < SB_ZONES) if (zone_in_use(zone)) return zone; return 0; @@ -411,21 +293,27 @@ inline int next(int zone) static void make_bad_inode(void) { - struct minix_inode *inode = &Inode[MINIX_BAD_INO]; + struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO]; int i, j, zone; int ind = 0, dind = 0; + /* moved to globals to reduce stack usage unsigned short ind_block[BLOCK_SIZE >> 1]; unsigned short dind_block[BLOCK_SIZE >> 1]; + */ +#define ind_block (G.ind_block1) +#define dind_block (G.dind_block1) #define NEXT_BAD (zone = next(zone)) - if (!badblocks) + if (!G.badblocks) return; mark_inode(MINIX_BAD_INO); inode->i_nlinks = 1; - inode->i_time = time(NULL); + /* BTW, setting this makes all images different */ + /* it's harder to check for bugs then - diff isn't helpful :(... */ + inode->i_time = CUR_TIME; inode->i_mode = S_IFREG + 0000; - inode->i_size = badblocks * BLOCK_SIZE; + inode->i_size = G.badblocks * BLOCK_SIZE; zone = next(0); for (i = 0; i < 7; i++) { inode->i_zone[i] = zone; @@ -451,30 +339,36 @@ static void make_bad_inode(void) goto end_bad; } } - die("too many bad blocks"); - end_bad: + bb_error_msg_and_die("too many bad blocks"); + end_bad: if (ind) write_block(ind, (char *) ind_block); if (dind) write_block(dind, (char *) dind_block); +#undef ind_block +#undef dind_block } -#ifdef BB_FEATURE_MINIX2 +#if ENABLE_FEATURE_MINIX2 static void make_bad_inode2(void) { - struct minix2_inode *inode = &Inode2[MINIX_BAD_INO]; + struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO]; int i, j, zone; int ind = 0, dind = 0; + /* moved to globals to reduce stack usage unsigned long ind_block[BLOCK_SIZE >> 2]; unsigned long dind_block[BLOCK_SIZE >> 2]; + */ +#define ind_block (G.ind_block2) +#define dind_block (G.dind_block2) - if (!badblocks) + if (!G.badblocks) return; mark_inode(MINIX_BAD_INO); inode->i_nlinks = 1; - inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL); + inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; inode->i_mode = S_IFREG + 0000; - inode->i_size = badblocks * BLOCK_SIZE; + inode->i_size = G.badblocks * BLOCK_SIZE; zone = next(0); for (i = 0; i < 7; i++) { inode->i_zone[i] = zone; @@ -501,373 +395,318 @@ static void make_bad_inode2(void) } } /* Could make triple indirect block here */ - die("too many bad blocks"); - end_bad: + bb_error_msg_and_die("too many bad blocks"); + end_bad: if (ind) write_block(ind, (char *) ind_block); if (dind) write_block(dind, (char *) dind_block); +#undef ind_block +#undef dind_block } +#else +void make_bad_inode2(void); #endif static void make_root_inode(void) { - struct minix_inode *inode = &Inode[MINIX_ROOT_INO]; + struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO]; mark_inode(MINIX_ROOT_INO); inode->i_zone[0] = get_free_block(); inode->i_nlinks = 2; - inode->i_time = time(NULL); - if (badblocks) - inode->i_size = 3 * dirsize; + inode->i_time = CUR_TIME; + if (G.badblocks) + inode->i_size = 3 * G.dirsize; else { - root_block[2 * dirsize] = '\0'; - root_block[2 * dirsize + 1] = '\0'; - inode->i_size = 2 * dirsize; + G.root_block[2 * G.dirsize] = '\0'; + G.root_block[2 * G.dirsize + 1] = '\0'; + inode->i_size = 2 * G.dirsize; } inode->i_mode = S_IFDIR + 0755; - inode->i_uid = getuid(); + inode->i_uid = GETUID; if (inode->i_uid) - inode->i_gid = getgid(); - write_block(inode->i_zone[0], root_block); + inode->i_gid = GETGID; + write_block(inode->i_zone[0], G.root_block); } -#ifdef BB_FEATURE_MINIX2 +#if ENABLE_FEATURE_MINIX2 static void make_root_inode2(void) { - struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO]; + struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO]; mark_inode(MINIX_ROOT_INO); inode->i_zone[0] = get_free_block(); inode->i_nlinks = 2; - inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL); - if (badblocks) - inode->i_size = 3 * dirsize; + inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; + if (G.badblocks) + inode->i_size = 3 * G.dirsize; else { - root_block[2 * dirsize] = '\0'; - root_block[2 * dirsize + 1] = '\0'; - inode->i_size = 2 * dirsize; + G.root_block[2 * G.dirsize] = '\0'; + G.root_block[2 * G.dirsize + 1] = '\0'; + inode->i_size = 2 * G.dirsize; } inode->i_mode = S_IFDIR + 0755; - inode->i_uid = getuid(); + inode->i_uid = GETUID; if (inode->i_uid) - inode->i_gid = getgid(); - write_block(inode->i_zone[0], root_block); + inode->i_gid = GETGID; + write_block(inode->i_zone[0], G.root_block); } +#else +void make_root_inode2(void); #endif -static void setup_tables(void) -{ - int i; - unsigned long inodes; - - memset(super_block_buffer, 0, BLOCK_SIZE); - memset(boot_block_buffer, 0, 512); - MAGIC = magic; - ZONESIZE = 0; - MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024; - ZONES = BLOCKS; -/* some magic nrs: 1 inode / 3 blocks */ - if (req_nr_inodes == 0) - inodes = BLOCKS / 3; - else - inodes = req_nr_inodes; - /* Round up inode count to fill block size */ -#ifdef BB_FEATURE_MINIX2 - if (version2) - inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) & - ~(MINIX2_INODES_PER_BLOCK - 1)); - else -#endif - inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) & - ~(MINIX_INODES_PER_BLOCK - 1)); - if (inodes > 65535) - inodes = 65535; - INODES = inodes; - IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK); - ZMAPS = 0; - i = 0; - while (ZMAPS != - UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1, - BITS_PER_BLOCK) && i < 1000) { - ZMAPS = - UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1, - BITS_PER_BLOCK); - i++; - } - /* Real bad hack but overwise mkfs.minix can be thrown - * in infinite loop... - * try: - * dd if=/dev/zero of=test.fs count=10 bs=1024 - * /sbin/mkfs.minix -i 200 test.fs - * */ - if (i >= 999) { - die("unable to allocate buffers for maps"); - } - FIRSTZONE = NORM_FIRSTZONE; - inode_map = xmalloc(IMAPS * BLOCK_SIZE); - zone_map = xmalloc(ZMAPS * BLOCK_SIZE); - memset(inode_map, 0xff, IMAPS * BLOCK_SIZE); - memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE); - for (i = FIRSTZONE; i < ZONES; i++) - unmark_zone(i); - for (i = MINIX_ROOT_INO; i <= INODES; i++) - unmark_inode(i); - inode_buffer = xmalloc(INODE_BUFFER_SIZE); - memset(inode_buffer, 0, INODE_BUFFER_SIZE); - printf("%ld inodes\n", INODES); - printf("%ld blocks\n", ZONES); - printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE); - printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE); - printf("Maxsize=%ld\n\n", MAXSIZE); -} - /* * Perform a test of a block; return the number of - * blocks readable/writeable. + * blocks readable. */ -long do_check(char *buffer, int try, unsigned int current_block) +static size_t do_check(char *buffer, size_t try, unsigned current_block) { - long got; + ssize_t got; /* Seek to the correct loc. */ - if (lseek(DEV, current_block * BLOCK_SIZE, SEEK_SET) != - current_block * BLOCK_SIZE) { - die("seek failed during testing of blocks"); - } - + msg_eol = "seek failed during testing of blocks"; + xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET); + msg_eol = "\n"; /* Try the read */ - got = read(DEV, buffer, try * BLOCK_SIZE); + got = read(dev_fd, buffer, try * BLOCK_SIZE); if (got < 0) got = 0; - if (got & (BLOCK_SIZE - 1)) { - printf("Weird values in do_check: probably bugs\n"); - } - got /= BLOCK_SIZE; - return got; -} + try = ((size_t)got) / BLOCK_SIZE; -static unsigned int currently_testing = 0; + if (got & (BLOCK_SIZE - 1)) + fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try)); + return try; +} -static void alarm_intr(int alnum) +static void alarm_intr(int alnum UNUSED_PARAM) { - if (currently_testing >= ZONES) + if (G.currently_testing >= SB_ZONES) return; signal(SIGALRM, alarm_intr); alarm(5); - if (!currently_testing) + if (!G.currently_testing) return; - printf("%d ...", currently_testing); - fflush(stdout); + printf("%d ...", G.currently_testing); + fflush_all(); } static void check_blocks(void) { - int try, got; - static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS]; + size_t try, got; - currently_testing = 0; + G.currently_testing = 0; signal(SIGALRM, alarm_intr); alarm(5); - while (currently_testing < ZONES) { - if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) != - currently_testing * BLOCK_SIZE) - die("seek failed in check_blocks"); + while (G.currently_testing < SB_ZONES) { + msg_eol = "seek failed in check_blocks"; + xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET); + msg_eol = "\n"; try = TEST_BUFFER_BLOCKS; - if (currently_testing + try > ZONES) - try = ZONES - currently_testing; - got = do_check(buffer, try, currently_testing); - currently_testing += got; + if (G.currently_testing + try > SB_ZONES) + try = SB_ZONES - G.currently_testing; + got = do_check(G.check_blocks_buffer, try, G.currently_testing); + G.currently_testing += got; if (got == try) continue; - if (currently_testing < FIRSTZONE) - die("bad blocks before data-area: cannot make fs"); - mark_zone(currently_testing); - badblocks++; - currently_testing++; + if (G.currently_testing < SB_FIRSTZONE) + bb_error_msg_and_die("bad blocks before data-area: cannot make fs"); + mark_zone(G.currently_testing); + G.badblocks++; + G.currently_testing++; } - if (badblocks > 1) - printf("%d bad blocks\n", badblocks); - else if (badblocks == 1) - printf("one bad block\n"); + alarm(0); + printf("%d bad block(s)\n", G.badblocks); } -static void get_list_blocks(filename) -char *filename; - +static void get_list_blocks(char *filename) { FILE *listfile; unsigned long blockno; - listfile = fopen(filename, "r"); - if (listfile == (FILE *) NULL) { - die("can't open file of bad blocks"); - } + listfile = xfopen_for_read(filename); while (!feof(listfile)) { - fscanf(listfile, "%ld\n", &blockno); + fscanf(listfile, "%lu\n", &blockno); mark_zone(blockno); - badblocks++; + G.badblocks++; } - if (badblocks > 1) - printf("%d bad blocks\n", badblocks); - else if (badblocks == 1) - printf("one bad block\n"); + printf("%d bad block(s)\n", G.badblocks); } -extern int mkfs_minix_main(int argc, char **argv) +static void setup_tables(void) { - int i=1; + unsigned long inodes; + unsigned norm_firstzone; + unsigned sb_zmaps; + unsigned i; + + /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */ + /* memset(G.boot_block_buffer, 0, 512); */ + SB_MAGIC = G.magic; + SB_ZONE_SIZE = 0; + SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024; + if (version2) + SB.s_zones = G.total_blocks; + else + SB.s_nzones = G.total_blocks; + + /* some magic nrs: 1 inode / 3 blocks */ + if (G.req_nr_inodes == 0) + inodes = G.total_blocks / 3; + else + inodes = G.req_nr_inodes; + /* Round up inode count to fill block size */ + if (version2) + inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) & + ~(MINIX2_INODES_PER_BLOCK - 1); + else + inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) & + ~(MINIX1_INODES_PER_BLOCK - 1); + if (inodes > 65535) + inodes = 65535; + SB_INODES = inodes; + SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK); + + /* Real bad hack but overwise mkfs.minix can be thrown + * in infinite loop... + * try: + * dd if=/dev/zero of=test.fs count=10 bs=1024 + * mkfs.minix -i 200 test.fs + */ + /* This code is not insane: NORM_FIRSTZONE is not a constant, + * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */ + i = 999; + SB_ZMAPS = 0; + do { + norm_firstzone = NORM_FIRSTZONE; + sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK); + if (SB_ZMAPS == sb_zmaps) goto got_it; + SB_ZMAPS = sb_zmaps; + /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */ + } while (--i); + bb_error_msg_and_die("incompatible size/inode count, try different -i N"); + got_it: + + SB_FIRSTZONE = norm_firstzone; + G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE); + G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE); + memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE); + memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE); + for (i = SB_FIRSTZONE; i < SB_ZONES; i++) + unmark_zone(i); + for (i = MINIX_ROOT_INO; i <= SB_INODES; i++) + unmark_inode(i); + G.inode_buffer = xzalloc(INODE_BUFFER_SIZE); + printf("%lu inodes\n", (unsigned long)SB_INODES); + printf("%lu blocks\n", (unsigned long)SB_ZONES); + printf("Firstdatazone=%lu (%lu)\n", (unsigned long)SB_FIRSTZONE, (unsigned long)norm_firstzone); + printf("Zonesize=%u\n", BLOCK_SIZE << SB_ZONE_SIZE); + printf("Maxsize=%lu\n", (unsigned long)SB_MAXSIZE); +} + +int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int mkfs_minix_main(int argc UNUSED_PARAM, char **argv) +{ + unsigned opt; char *tmp; - struct stat statbuf; + char *str_i; char *listfile = NULL; - int stopIt=FALSE; - if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); -#ifdef BB_FEATURE_MINIX2 + INIT_G(); +/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */ + G.namelen = 30; + G.dirsize = 32; + G.magic = MINIX1_SUPER_MAGIC2; + + if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) + bb_error_msg_and_die("bad inode size"); +#if ENABLE_FEATURE_MINIX2 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); + bb_error_msg_and_die("bad inode size"); #endif - - /* Parse options */ - argv++; - while (--argc >= 0 && *argv && **argv) { - if (**argv == '-') { - stopIt=FALSE; - while (i > 0 && *++(*argv) && stopIt==FALSE) { - switch (**argv) { - case 'c': - check = 1; - break; - case 'i': - { - char *cp=NULL; - if (*(*argv+1) != 0) { - cp = ++(*argv); - } else { - if (--argc == 0) { - goto goodbye; - } - cp = *(++argv); - } - req_nr_inodes = strtoul(cp, &tmp, 0); - if (*tmp) - show_usage(); - stopIt=TRUE; - break; - } - case 'l': - if (--argc == 0) { - goto goodbye; - } - listfile = *(++argv); - break; - case 'n': - { - char *cp=NULL; - - if (*(*argv+1) != 0) { - cp = ++(*argv); - } else { - if (--argc == 0) { - goto goodbye; - } - cp = *(++argv); - } - i = strtoul(cp, &tmp, 0); - if (*tmp) - show_usage(); - if (i == 14) - magic = MINIX_SUPER_MAGIC; - else if (i == 30) - magic = MINIX_SUPER_MAGIC2; - else - show_usage(); - namelen = i; - dirsize = i + 2; - stopIt=TRUE; - break; - } - case 'v': -#ifdef BB_FEATURE_MINIX2 - version2 = 1; + + opt = getopt32(argv, "ci:l:n:+v", &str_i, &listfile, &G.namelen); + argv += optind; + //if (opt & 1) -c + if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i + //if (opt & 4) -l + if (opt & 8) { // -n + if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC; + else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2; + else bb_show_usage(); + G.dirsize = G.namelen + 2; + } + if (opt & 0x10) { // -v +#if ENABLE_FEATURE_MINIX2 + version2 = 1; #else - errorMsg("%s: not compiled with minix v2 support\n", - device_name); - exit(-1); + bb_error_msg_and_die("not compiled with minix v2 support"); #endif - break; - case '-': - case 'h': - default: -goodbye: - show_usage(); - } - } - } else { - if (device_name == NULL) - device_name = *argv; - else if (BLOCKS == 0) - BLOCKS = strtol(*argv, &tmp, 0); - else { - goto goodbye; - } - } - argv++; } - if (device_name && !BLOCKS) - BLOCKS = get_size(device_name) / 1024; - if (!device_name || BLOCKS < 10) { - show_usage(); - } -#ifdef BB_FEATURE_MINIX2 + G.device_name = argv[0]; + if (!G.device_name) + bb_show_usage(); + + /* Check if it is mounted */ + if (find_mount_point(G.device_name, 0)) + bb_error_msg_and_die("can't format mounted filesystem"); + + xmove_fd(xopen(G.device_name, O_RDWR), dev_fd); + + G.total_blocks = get_volume_size_in_bytes(dev_fd, argv[1], 1024, /*extend:*/ 1) / 1024; + + if (G.total_blocks < 10) + bb_error_msg_and_die("must have at least 10 blocks"); + if (version2) { - if (namelen == 14) - magic = MINIX2_SUPER_MAGIC; - else - magic = MINIX2_SUPER_MAGIC2; - } else + G.magic = MINIX2_SUPER_MAGIC2; + if (G.namelen == 14) + G.magic = MINIX2_SUPER_MAGIC; + } else if (G.total_blocks > 65535) + G.total_blocks = 65535; +#if 0 + struct stat statbuf; + xfstat(dev_fd, &statbuf, G.device_name); +/* why? */ + if (!S_ISBLK(statbuf.st_mode)) + opt &= ~1; // clear -c (check) +#if 0 +/* I don't know why someone has special code to prevent mkfs.minix + * on IDE devices. Why IDE but not SCSI, etc?... */ + else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) + /* what is this? */ + bb_error_msg_and_die("will not try " + "to make filesystem on '%s'", G.device_name); #endif - if (BLOCKS > 65535) - BLOCKS = 65535; - check_mount(); /* is it already mounted? */ - tmp = root_block; +#endif + tmp = G.root_block; *(short *) tmp = 1; strcpy(tmp + 2, "."); - tmp += dirsize; + tmp += G.dirsize; *(short *) tmp = 1; strcpy(tmp + 2, ".."); - tmp += dirsize; + tmp += G.dirsize; *(short *) tmp = 2; strcpy(tmp + 2, ".badblocks"); - DEV = open(device_name, O_RDWR); - if (DEV < 0) - die("unable to open %s"); - if (fstat(DEV, &statbuf) < 0) - die("unable to stat %s"); - if (!S_ISBLK(statbuf.st_mode)) - check = 0; - else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) - die("will not try to make filesystem on '%s'"); + setup_tables(); - if (check) + + if (opt & 1) // -c ? check_blocks(); else if (listfile) get_list_blocks(listfile); -#ifdef BB_FEATURE_MINIX2 + if (version2) { make_root_inode2(); make_bad_inode2(); - } else -#endif - { + } else { make_root_inode(); make_bad_inode(); } + mark_good_blocks(); write_tables(); - return( 0); - + return 0; }