X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=util-linux%2Fmkfs_minix.c;h=b1d538dcc6deede012fd97b2189c1d2cb04d4abc;hb=248d2220f9985754268f4492278758052494b80a;hp=c6f057a0787ef6bc9fc48e2b22ea6ec0bafd4c14;hpb=8ea7d8cdaf4a03cdc06abc8b752b589271140a88;p=oweals%2Fbusybox.git diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c index c6f057a07..b1d538dcc 100644 --- a/util-linux/mkfs_minix.c +++ b/util-linux/mkfs_minix.c @@ -35,7 +35,7 @@ * * 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) @@ -49,20 +49,19 @@ * * 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 @@ -71,19 +70,105 @@ #include #include #include +#include #include -#include #include #include #include +#include "busybox.h" + +#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. */ -#include -#include +#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) +#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) -#ifdef MINIX2_SUPER_MAGIC2 -#define HAVE_MINIX2 1 +#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 { + uint16_t i_mode; + uint16_t i_uid; + uint32_t i_size; + uint32_t i_time; + uint8_t i_gid; + uint8_t i_nlinks; + uint16_t 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 { + uint16_t i_mode; + uint16_t i_nlinks; + uint16_t i_uid; + uint16_t i_gid; + uint32_t i_size; + uint32_t i_atime; + uint32_t i_mtime; + uint32_t i_ctime; + uint32_t i_zone[10]; +}; + +/* + * minix super-block data on disk + */ +struct minix_super_block { + uint16_t s_ninodes; + uint16_t s_nzones; + uint16_t s_imap_blocks; + uint16_t s_zmap_blocks; + uint16_t s_firstdatazone; + uint16_t s_log_zone_size; + uint32_t s_max_size; + uint16_t s_magic; + uint16_t s_state; + uint32_t s_zones; +}; + +struct minix_dir_entry { + uint16_t inode; + char name[0]; +}; + +#define BLOCK_SIZE_BITS 10 +#define BLOCK_SIZE (1<> 3] & (1<<(i & 7))) != 0; +} +#define inode_in_use(x) (bit(inode_map,(x))) +#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1)) #define mark_inode(x) (setbit(inode_map,(x))) #define unmark_inode(x) (clrbit(inode_map,(x))) @@ -162,46 +250,12 @@ static unsigned long req_nr_inodes = 0; #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) -{ - fprintf(stderr, "%s: %s\n", program_name, str); - exit(8); -} - -static volatile void show_usage() __attribute__ ((noreturn)); -static volatile void show_usage() -{ - fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", - BB_VER, BB_BT); - fprintf(stderr, - "Usage: %s [-c | -l filename] [-nXX] [-iXX] /dev/name [blocks]\n", - program_name); -#ifndef BB_FEATURE_TRIVIAL_HELP - fprintf(stderr, "\nMake a MINIX filesystem.\n\n"); - fprintf(stderr, "OPTIONS:\n"); - fprintf(stderr, "\t-c\t\tCheck the device for bad blocks\n"); - fprintf(stderr, - "\t-n [14|30]\tSpecify the maximum length of filenames\n"); - fprintf(stderr, - "\t-i\t\tSpecify the number of inodes for the filesystem\n"); - fprintf(stderr, - "\t-l FILENAME\tRead the bad blocks list from FILENAME\n"); - fprintf(stderr, "\t-v\t\tMake a Minix version 2 filesystem\n\n"); -#endif - exit(16); -} - /* * 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 inline void check_mount(void) { FILE *f; struct mntent *mnt; @@ -215,7 +269,7 @@ static void check_mount(void) if (!mnt) return; - die("%s is mounted; will not make a filesystem here!"); + bb_error_msg_and_die("%s is mounted; will not make a filesystem here!", device_name); } static long valid_offset(int fd, int offset) @@ -229,7 +283,7 @@ static long valid_offset(int fd, int offset) return 1; } -static int count_blocks(int fd) +static inline int count_blocks(int fd) { int high, low; @@ -248,16 +302,13 @@ static int count_blocks(int fd) return (low + 1); } -static int get_size(const char *file) +static inline int get_size(const char *file) { int fd; long size; - fd = open(file, O_RDWR); - if (fd < 0) { - perror(file); - exit(1); - } + if ((fd = open(file, O_RDWR)) < 0) + bb_perror_msg_and_die("%s", file); if (ioctl(fd, BLKGETSIZE, &size) >= 0) { close(fd); return (size * 512); @@ -268,35 +319,35 @@ static int get_size(const char *file) return size; } -static void write_tables(void) +static inline 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"); + bb_error_msg_and_die("seek to boot block failed in write_tables"); if (512 != write(DEV, boot_block_buffer, 512)) - die("unable to clear boot sector"); + bb_error_msg_and_die("unable to clear boot sector"); if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET)) - die("seek failed in write_tables"); + bb_error_msg_and_die("seek failed in write_tables"); if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE)) - die("unable to write super-block"); + bb_error_msg_and_die("unable to write super-block"); if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE)) - die("unable to write inode map"); + bb_error_msg_and_die("unable to write inode map"); if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE)) - die("unable to write zone map"); + bb_error_msg_and_die("unable to write zone map"); if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE)) - die("unable to write inodes"); + bb_error_msg_and_die("unable to write inodes"); } 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"); + bb_error_msg_and_die("seek failed in write_block"); if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE)) - die("write failed in write_block"); + bb_error_msg_and_die("write failed in write_block"); } static int get_free_block(void) @@ -304,7 +355,7 @@ static int get_free_block(void) int blk; if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS) - die("too many bad blocks"); + bb_error_msg_and_die("too many bad blocks"); if (used_good_blocks) blk = good_blocks_table[used_good_blocks - 1] + 1; else @@ -312,13 +363,13 @@ static int get_free_block(void) while (blk < ZONES && zone_in_use(blk)) blk++; if (blk >= ZONES) - die("not enough good blocks"); + bb_error_msg_and_die("not enough good blocks"); good_blocks_table[used_good_blocks] = blk; used_good_blocks++; return blk; } -static void mark_good_blocks(void) +static inline void mark_good_blocks(void) { int blk; @@ -326,7 +377,7 @@ static void mark_good_blocks(void) mark_zone(good_blocks_table[blk]); } -inline int next(int zone) +static int next(int zone) { if (!zone) zone = FIRSTZONE - 1; @@ -336,7 +387,7 @@ inline int next(int zone) return 0; } -static void make_bad_inode(void) +static inline void make_bad_inode(void) { struct minix_inode *inode = &Inode[MINIX_BAD_INO]; int i, j, zone; @@ -378,7 +429,7 @@ static void make_bad_inode(void) goto end_bad; } } - die("too many bad blocks"); + bb_error_msg_and_die("too many bad blocks"); end_bad: if (ind) write_block(ind, (char *) ind_block); @@ -386,8 +437,8 @@ static void make_bad_inode(void) write_block(dind, (char *) dind_block); } -#ifdef HAVE_MINIX2 -static void make_bad_inode2(void) +#ifdef CONFIG_FEATURE_MINIX2 +static inline void make_bad_inode2(void) { struct minix2_inode *inode = &Inode2[MINIX_BAD_INO]; int i, j, zone; @@ -428,7 +479,7 @@ static void make_bad_inode2(void) } } /* Could make triple indirect block here */ - die("too many bad blocks"); + bb_error_msg_and_die("too many bad blocks"); end_bad: if (ind) write_block(ind, (char *) ind_block); @@ -437,7 +488,7 @@ static void make_bad_inode2(void) } #endif -static void make_root_inode(void) +static inline void make_root_inode(void) { struct minix_inode *inode = &Inode[MINIX_ROOT_INO]; @@ -459,8 +510,8 @@ static void make_root_inode(void) write_block(inode->i_zone[0], root_block); } -#ifdef HAVE_MINIX2 -static void make_root_inode2(void) +#ifdef CONFIG_FEATURE_MINIX2 +static inline void make_root_inode2(void) { struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO]; @@ -483,7 +534,7 @@ static void make_root_inode2(void) } #endif -static void setup_tables(void) +static inline void setup_tables(void) { int i; unsigned long inodes; @@ -493,14 +544,20 @@ static void setup_tables(void) MAGIC = magic; ZONESIZE = 0; MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024; - ZONES = BLOCKS; +#ifdef CONFIG_FEATURE_MINIX2 + if (version2) { + Super.s_zones = BLOCKS; + } else +#endif + Super.s_nzones = 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 HAVE_MINIX2 +#ifdef CONFIG_FEATURE_MINIX2 if (version2) inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) & ~(MINIX2_INODES_PER_BLOCK - 1)); @@ -529,7 +586,7 @@ static void setup_tables(void) * /sbin/mkfs.minix -i 200 test.fs * */ if (i >= 999) { - die("unable to allocate buffers for maps"); + bb_error_msg_and_die("unable to allocate buffers for maps"); } FIRSTZONE = NORM_FIRSTZONE; inode_map = xmalloc(IMAPS * BLOCK_SIZE); @@ -542,25 +599,25 @@ static void setup_tables(void) 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("%ld inodes\n", (long)INODES); + printf("%ld blocks\n", (long)ZONES); + printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE); printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE); - printf("Maxsize=%ld\n\n", MAXSIZE); + printf("Maxsize=%ld\n\n", (long)MAXSIZE); } /* * Perform a test of a block; return the number of - * blocks readable/writeable. + * blocks readable/writable. */ -long do_check(char *buffer, int try, unsigned int current_block) +static inline long do_check(char *buffer, int try, unsigned int current_block) { long 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"); + bb_error_msg_and_die("seek failed during testing of blocks"); } @@ -575,7 +632,7 @@ long do_check(char *buffer, int try, unsigned int current_block) return got; } -static unsigned int currently_testing = 0; +static unsigned int currently_testing; static void alarm_intr(int alnum) { @@ -600,7 +657,7 @@ static void check_blocks(void) while (currently_testing < ZONES) { if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) != currently_testing * BLOCK_SIZE) - die("seek failed in check_blocks"); + bb_error_msg_and_die("seek failed in check_blocks"); try = TEST_BUFFER_BLOCKS; if (currently_testing + try > ZONES) try = ZONES - currently_testing; @@ -609,7 +666,7 @@ static void check_blocks(void) if (got == try) continue; if (currently_testing < FIRSTZONE) - die("bad blocks before data-area: cannot make fs"); + bb_error_msg_and_die("bad blocks before data-area: cannot make fs"); mark_zone(currently_testing); badblocks++; currently_testing++; @@ -620,17 +677,12 @@ static void check_blocks(void) printf("one bad block\n"); } -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 = bb_xfopen(filename, "r"); while (!feof(listfile)) { fscanf(listfile, "%ld\n", &blockno); mark_zone(blockno); @@ -644,39 +696,46 @@ char *filename; extern int mkfs_minix_main(int argc, char **argv) { - int i; + int i=1; char *tmp; struct stat statbuf; char *listfile = NULL; int stopIt=FALSE; - if (argc && *argv) - program_name = *argv; if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); -#ifdef HAVE_MINIX2 + bb_error_msg_and_die("bad inode size"); +#ifdef CONFIG_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 */ - //printf("argc='%d' argv='%s'\n", argc, *argv); argv++; while (--argc >= 0 && *argv && **argv) { if (**argv == '-') { stopIt=FALSE; while (i > 0 && *++(*argv) && stopIt==FALSE) { - //printf("argc='%d' argv='%s'\n", argc, *argv); switch (**argv) { case 'c': check = 1; break; case 'i': - if (--argc == 0) { - goto goodbye; + { + 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) + bb_show_usage(); + stopIt=TRUE; + break; } - req_nr_inodes = (unsigned long) atol(*(++argv)); - break; case 'l': if (--argc == 0) { goto goodbye; @@ -687,35 +746,34 @@ extern int mkfs_minix_main(int argc, char **argv) { char *cp=NULL; - if (--argc == 0) { - goto goodbye; - } if (*(*argv+1) != 0) { cp = ++(*argv); } else { + if (--argc == 0) { + goto goodbye; + } cp = *(++argv); } i = strtoul(cp, &tmp, 0); - //printf("cp='%s' i='%d'\n", cp, i); if (*tmp) - show_usage(); + bb_show_usage(); if (i == 14) magic = MINIX_SUPER_MAGIC; else if (i == 30) magic = MINIX_SUPER_MAGIC2; - else - show_usage(); + else + bb_show_usage(); namelen = i; dirsize = i + 2; stopIt=TRUE; break; } case 'v': -#ifdef HAVE_MINIX2 +#ifdef CONFIG_FEATURE_MINIX2 version2 = 1; #else - fprintf(stderr, "%s: not compiled with minix v2 support\n", - program_name, device_name); + bb_error_msg("%s: not compiled with minix v2 support", + device_name); exit(-1); #endif break; @@ -723,11 +781,10 @@ extern int mkfs_minix_main(int argc, char **argv) case 'h': default: goodbye: - show_usage(); + bb_show_usage(); } } } else { - //printf("else: argc='%d' argv='%s'\n", argc, *argv); if (device_name == NULL) device_name = *argv; else if (BLOCKS == 0) @@ -742,9 +799,9 @@ goodbye: if (device_name && !BLOCKS) BLOCKS = get_size(device_name) / 1024; if (!device_name || BLOCKS < 10) { - show_usage(); + bb_show_usage(); } -#ifdef HAVE_MINIX2 +#ifdef CONFIG_FEATURE_MINIX2 if (version2) { if (namelen == 14) magic = MINIX2_SUPER_MAGIC; @@ -766,19 +823,19 @@ goodbye: strcpy(tmp + 2, ".badblocks"); DEV = open(device_name, O_RDWR); if (DEV < 0) - die("unable to open %s"); + bb_error_msg_and_die("unable to open %s", device_name); if (fstat(DEV, &statbuf) < 0) - die("unable to stat %s"); + bb_error_msg_and_die("unable to stat %s", device_name); 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'"); + bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name); setup_tables(); if (check) check_blocks(); else if (listfile) get_list_blocks(listfile); -#ifdef HAVE_MINIX2 +#ifdef CONFIG_FEATURE_MINIX2 if (version2) { make_root_inode2(); make_bad_inode2(); @@ -790,6 +847,6 @@ goodbye: } mark_good_blocks(); write_tables(); - exit( 0); + return 0; }