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Diffstat (limited to '')
-rw-r--r-- | disk-utils/mkfs.minix.c | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/disk-utils/mkfs.minix.c b/disk-utils/mkfs.minix.c new file mode 100644 index 0000000..1710616 --- /dev/null +++ b/disk-utils/mkfs.minix.c @@ -0,0 +1,857 @@ +/* + * mkfs.minix.c - make a linux (minix) file-system. + * + * (C) 1991 Linus Torvalds. This file may be redistributed as per + * the Linux copyright. + */ + +/* + * DD.MM.YY + * + * 24.11.91 - Time began. Used the fsck sources to get started. + * + * 25.11.91 - Corrected some bugs. Added support for ".badblocks" + * The algorithm for ".badblocks" is a bit weird, but + * it should work. Oh, well. + * + * 25.01.92 - Added the -l option for getting the list of bad blocks + * out of a named file. (Dave Rivers, rivers@ponds.uucp) + * + * 28.02.92 - Added %-information when using -c. + * + * 28.02.93 - Added support for other namelengths than the original + * 14 characters so that I can test the new kernel routines.. + * + * 09.10.93 - Make exit status conform to that required by fsutil + * (Rik Faith, faith@cs.unc.edu) + * + * 31.10.93 - Added inode request feature, for backup floppies: use + * 32 inodes, for a news partition use more. + * (Scott Heavner, sdh@po.cwru.edu) + * + * 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) + * + * 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) + * + * 03.20.95 - Clear first 512 bytes of filesystem to make certain that + * the filesystem is not misidentified as a MS-DOS FAT filesystem. + * (Daniel Quinlan, quinlan@yggdrasil.com) + * + * 02.07.96 - Added small patch from Russell King to make the program a + * good deal more portable (janl@math.uio.no) + * + * 06.29.11 - Overall cleanups for util-linux and v3 support + * Davidlohr Bueso <dave@gnu.org> + * + * 06.20.15 - Do not infinite loop or crash on large devices + * Joshua Hudson <joshudson@gmail.com> + * + */ + +#include <stdio.h> +#include <time.h> +#include <unistd.h> +#include <string.h> +#include <signal.h> +#include <fcntl.h> +#include <ctype.h> +#include <stdlib.h> +#include <termios.h> +#include <sys/stat.h> +#include <getopt.h> +#include <err.h> + +#include "blkdev.h" +#include "minix_programs.h" +#include "nls.h" +#include "pathnames.h" +#include "bitops.h" +#include "exitcodes.h" +#include "strutils.h" +#include "all-io.h" +#include "closestream.h" +#include "ismounted.h" + +#define XALLOC_EXIT_CODE MKFS_EX_ERROR +#include "xalloc.h" + +#define MINIX_ROOT_INO 1 +#define MINIX_BAD_INO 2 + +#define TEST_BUFFER_BLOCKS 16 +#define MAX_GOOD_BLOCKS 512 + +#define MINIX_MAX_INODES 65535 + +#define DEFAULT_FS_VERSION 1 + +/* + * Global variables used in minix_programs.h inline functions + */ +int fs_version = DEFAULT_FS_VERSION; +char *super_block_buffer; + +static char *inode_buffer = NULL; + +#define Inode (((struct minix_inode *) inode_buffer) - 1) +#define Inode2 (((struct minix2_inode *) inode_buffer) - 1) + +struct fs_control { + char *device_name; /* device on a Minix file system is created */ + int device_fd; /* open file descriptor of the device */ + char *lockmode; /* as specified by --lock */ + unsigned long long fs_blocks; /* device block count for the file system */ + int fs_used_blocks; /* used blocks on a device */ + int fs_bad_blocks; /* number of bad blocks found from device */ + uint16_t fs_namelen; /* maximum length of filenames */ + size_t fs_dirsize; /* maximum size of directory */ + unsigned long fs_inodes; /* number of inodes */ + int fs_magic; /* file system magic number */ + unsigned int + check_blocks:1; /* check for bad blocks */ +}; + +static char root_block[MINIX_BLOCK_SIZE]; +static char boot_block_buffer[512]; +static unsigned short good_blocks_table[MAX_GOOD_BLOCKS]; + +static char *inode_map; +static char *zone_map; + +#define zone_in_use(x) (isset(zone_map,(x)-get_first_zone()+1) != 0) + +#define mark_inode(x) (setbit(inode_map,(x))) +#define unmark_inode(x) (clrbit(inode_map,(x))) + +#define mark_zone(x) (setbit(zone_map,(x)-get_first_zone()+1)) +#define unmark_zone(x) (clrbit(zone_map,(x)-get_first_zone()+1)) + +static void __attribute__((__noreturn__)) usage(void) +{ + FILE *out = stdout; + fputs(USAGE_HEADER, out); + fprintf(out, _(" %s [options] /dev/name [blocks]\n"), program_invocation_short_name); + fputs(USAGE_OPTIONS, out); + fputs(_(" -1 use Minix version 1\n"), out); + fputs(_(" -2, -v use Minix version 2\n"), out); + fputs(_(" -3 use Minix version 3\n"), out); + fputs(_(" -n, --namelength <num> maximum length of filenames\n"), out); + fputs(_(" -i, --inodes <num> number of inodes for the filesystem\n"), out); + fputs(_(" -c, --check check the device for bad blocks\n"), out); + fputs(_(" -l, --badblocks <file> list of bad blocks from file\n"), out); + fprintf(out, _( + " --lock[=<mode>] use exclusive device lock (%s, %s or %s)\n"), "yes", "no", "nonblock"); + fputs(USAGE_SEPARATOR, out); + printf(USAGE_HELP_OPTIONS(25)); + printf(USAGE_MAN_TAIL("mkfs.minix(8)")); + exit(MKFS_EX_OK); +} + +#ifdef TEST_SCRIPT +static inline time_t mkfs_minix_time(time_t *t) +{ + const char *str = getenv("MKFS_MINIX_TEST_SECOND_SINCE_EPOCH"); + time_t sec; + + if (str && sscanf(str, "%ld", &sec) == 1) + return sec; + return time(t); +} +#else /* !TEST_SCRIPT */ +# define mkfs_minix_time(x) time(x) +#endif + +static void super_set_state(void) +{ + switch (fs_version) { + case 1: + case 2: + Super.s_state |= MINIX_VALID_FS; + Super.s_state &= ~MINIX_ERROR_FS; + break; + default: /* v3 */ + break; + } +} + +static void write_tables(const struct fs_control *ctl) { + unsigned long imaps = get_nimaps(); + unsigned long zmaps = get_nzmaps(); + size_t buffsz = get_inode_buffer_size(); + + /* Mark the super block valid. */ + super_set_state(); + + if (lseek(ctl->device_fd, 0, SEEK_SET)) + err(MKFS_EX_ERROR, _("%s: seek to boot block failed " + " in write_tables"), ctl->device_name); + if (write_all(ctl->device_fd, boot_block_buffer, 512)) + err(MKFS_EX_ERROR, _("%s: unable to clear boot sector"), ctl->device_name); + if (MINIX_BLOCK_SIZE != lseek(ctl->device_fd, MINIX_BLOCK_SIZE, SEEK_SET)) + err(MKFS_EX_ERROR, _("%s: seek failed in write_tables"), ctl->device_name); + + if (write_all(ctl->device_fd, super_block_buffer, MINIX_BLOCK_SIZE)) + err(MKFS_EX_ERROR, _("%s: unable to write super-block"), ctl->device_name); + + if (write_all(ctl->device_fd, inode_map, imaps * MINIX_BLOCK_SIZE)) + err(MKFS_EX_ERROR, _("%s: unable to write inode map"), ctl->device_name); + + if (write_all(ctl->device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE)) + err(MKFS_EX_ERROR, _("%s: unable to write zone map"), ctl->device_name); + + if (write_all(ctl->device_fd, inode_buffer, buffsz)) + err(MKFS_EX_ERROR, _("%s: unable to write inodes"), ctl->device_name); +} + +static void write_block(const struct fs_control *ctl, int blk, char * buffer) { + if (blk * MINIX_BLOCK_SIZE != lseek(ctl->device_fd, blk * MINIX_BLOCK_SIZE, SEEK_SET)) + errx(MKFS_EX_ERROR, _("%s: seek failed in write_block"), ctl->device_name); + + if (write_all(ctl->device_fd, buffer, MINIX_BLOCK_SIZE)) + errx(MKFS_EX_ERROR, _("%s: write failed in write_block"), ctl->device_name); +} + +static int get_free_block(struct fs_control *ctl) { + unsigned int blk; + unsigned int zones = get_nzones(); + unsigned int first_zone = get_first_zone(); + + if (ctl->fs_used_blocks + 1 >= MAX_GOOD_BLOCKS) + errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name); + if (ctl->fs_used_blocks) + blk = good_blocks_table[ctl->fs_used_blocks - 1] + 1; + else + blk = first_zone; + while (blk < zones && zone_in_use(blk)) + blk++; + if (blk >= zones) + errx(MKFS_EX_ERROR, _("%s: not enough good blocks"), ctl->device_name); + good_blocks_table[ctl->fs_used_blocks] = blk; + ctl->fs_used_blocks++; + return blk; +} + +static void mark_good_blocks(const struct fs_control *ctl) { + int blk; + + for (blk=0 ; blk < ctl->fs_used_blocks ; blk++) + mark_zone(good_blocks_table[blk]); +} + +static inline int next(unsigned long zone) { + unsigned long zones = get_nzones(); + unsigned long first_zone = get_first_zone(); + + if (!zone) + zone = first_zone-1; + while (++zone < zones) + if (zone_in_use(zone)) + return zone; + return 0; +} + +static void make_bad_inode_v1(struct fs_control *ctl) +{ + struct minix_inode * inode = &Inode[MINIX_BAD_INO]; + int i,j,zone; + int ind=0,dind=0; + unsigned short ind_block[MINIX_BLOCK_SIZE>>1]; + unsigned short dind_block[MINIX_BLOCK_SIZE>>1]; + +#define NEXT_BAD (zone = next(zone)) + + if (!ctl->fs_bad_blocks) + return; + mark_inode(MINIX_BAD_INO); + inode->i_nlinks = 1; + inode->i_time = mkfs_minix_time(NULL); + inode->i_mode = S_IFREG + 0000; + inode->i_size = ctl->fs_bad_blocks * MINIX_BLOCK_SIZE; + zone = next(0); + for (i=0 ; i<7 ; i++) { + inode->i_zone[i] = zone; + if (!NEXT_BAD) + goto end_bad; + } + inode->i_zone[7] = ind = get_free_block(ctl); + memset(ind_block,0,MINIX_BLOCK_SIZE); + for (i=0 ; i<512 ; i++) { + ind_block[i] = zone; + if (!NEXT_BAD) + goto end_bad; + } + inode->i_zone[8] = dind = get_free_block(ctl); + memset(dind_block,0,MINIX_BLOCK_SIZE); + for (i=0 ; i<512 ; i++) { + write_block(ctl, ind,(char *) ind_block); + dind_block[i] = ind = get_free_block(ctl); + memset(ind_block,0,MINIX_BLOCK_SIZE); + for (j=0 ; j<512 ; j++) { + ind_block[j] = zone; + if (!NEXT_BAD) + goto end_bad; + } + } + errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name); +end_bad: + if (ind) + write_block(ctl, ind, (char *) ind_block); + if (dind) + write_block(ctl, dind, (char *) dind_block); +} + +static void make_bad_inode_v2_v3 (struct fs_control *ctl) +{ + struct minix2_inode *inode = &Inode2[MINIX_BAD_INO]; + int i, j, zone; + int ind = 0, dind = 0; + unsigned long ind_block[MINIX_BLOCK_SIZE >> 2]; + unsigned long dind_block[MINIX_BLOCK_SIZE >> 2]; + + if (!ctl->fs_bad_blocks) + return; + mark_inode (MINIX_BAD_INO); + inode->i_nlinks = 1; + inode->i_atime = inode->i_mtime = inode->i_ctime = mkfs_minix_time(NULL); + inode->i_mode = S_IFREG + 0000; + inode->i_size = ctl->fs_bad_blocks * MINIX_BLOCK_SIZE; + zone = next (0); + for (i = 0; i < 7; i++) { + inode->i_zone[i] = zone; + if (!NEXT_BAD) + goto end_bad; + } + inode->i_zone[7] = ind = get_free_block (ctl); + memset (ind_block, 0, MINIX_BLOCK_SIZE); + for (i = 0; i < 256; i++) { + ind_block[i] = zone; + if (!NEXT_BAD) + goto end_bad; + } + inode->i_zone[8] = dind = get_free_block (ctl); + memset (dind_block, 0, MINIX_BLOCK_SIZE); + for (i = 0; i < 256; i++) { + write_block (ctl, ind, (char *) ind_block); + dind_block[i] = ind = get_free_block (ctl); + memset (ind_block, 0, MINIX_BLOCK_SIZE); + for (j = 0; j < 256; j++) { + ind_block[j] = zone; + if (!NEXT_BAD) + goto end_bad; + } + } + /* Could make triple indirect block here */ + errx(MKFS_EX_ERROR, _("%s: too many bad blocks"), ctl->device_name); + end_bad: + if (ind) + write_block (ctl, ind, (char *) ind_block); + if (dind) + write_block (ctl, dind, (char *) dind_block); +} + +static void make_bad_inode(struct fs_control *ctl) +{ + if (fs_version < 2) { + make_bad_inode_v1(ctl); + return; + } + make_bad_inode_v2_v3(ctl); +} + +static void make_root_inode_v1(struct fs_control *ctl) { + struct minix_inode * inode = &Inode[MINIX_ROOT_INO]; + + mark_inode(MINIX_ROOT_INO); + inode->i_zone[0] = get_free_block(ctl); + inode->i_nlinks = 2; + inode->i_time = mkfs_minix_time(NULL); + if (ctl->fs_bad_blocks) + inode->i_size = 3 * ctl->fs_dirsize; + else { + memset(&root_block[2 * ctl->fs_dirsize], 0, ctl->fs_dirsize); + inode->i_size = 2 * ctl->fs_dirsize; + } + inode->i_mode = S_IFDIR + 0755; + inode->i_uid = getuid(); + if (inode->i_uid) + inode->i_gid = getgid(); + write_block(ctl, inode->i_zone[0],root_block); +} + +static void make_root_inode_v2_v3 (struct fs_control *ctl) { + struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO]; + + mark_inode (MINIX_ROOT_INO); + inode->i_zone[0] = get_free_block (ctl); + inode->i_nlinks = 2; + inode->i_atime = inode->i_mtime = inode->i_ctime = mkfs_minix_time(NULL); + + if (ctl->fs_bad_blocks) + inode->i_size = 3 * ctl->fs_dirsize; + else { + memset(&root_block[2 * ctl->fs_dirsize], 0, ctl->fs_dirsize); + inode->i_size = 2 * ctl->fs_dirsize; + } + + inode->i_mode = S_IFDIR + 0755; + inode->i_uid = getuid(); + if (inode->i_uid) + inode->i_gid = getgid(); + write_block (ctl, inode->i_zone[0], root_block); +} + +static void make_root_inode(struct fs_control *ctl) +{ + char *tmp = root_block; + + if (fs_version == 3) { + *(uint32_t *) tmp = 1; + strcpy(tmp + 4, "."); + tmp += ctl->fs_dirsize; + *(uint32_t *) tmp = 1; + strcpy(tmp + 4, ".."); + tmp += ctl->fs_dirsize; + *(uint32_t *) tmp = 2; + strcpy(tmp + 4, ".badblocks"); + } else { + *(uint16_t *) tmp = 1; + strcpy(tmp + 2, "."); + tmp += ctl->fs_dirsize; + *(uint16_t *) tmp = 1; + strcpy(tmp + 2, ".."); + tmp += ctl->fs_dirsize; + *(uint16_t *) tmp = 2; + strcpy(tmp + 2, ".badblocks"); + } + if (fs_version < 2) { + make_root_inode_v1(ctl); + return; + } + make_root_inode_v2_v3(ctl); +} + +static void super_set_nzones(const struct fs_control *ctl) +{ + switch (fs_version) { + case 3: + Super3.s_zones = ctl->fs_blocks; + break; + case 2: + Super.s_zones = ctl->fs_blocks; + break; + default: /* v1 */ + Super.s_nzones = ctl->fs_blocks; + break; + } +} + +static void super_init_maxsize(void) +{ + switch (fs_version) { + case 3: + Super3.s_max_size = 2147483647L; + break; + case 2: + Super.s_max_size = 0x7fffffff; + break; + default: /* v1 */ + Super.s_max_size = (7+512+512*512)*1024; + break; + } +} + +static void super_set_map_blocks(const struct fs_control *ctl, unsigned long inodes) +{ + switch (fs_version) { + case 3: + Super3.s_imap_blocks = UPPER(inodes + 1, BITS_PER_BLOCK); + Super3.s_zmap_blocks = UPPER(ctl->fs_blocks - (1 + get_nimaps() + inode_blocks()), + BITS_PER_BLOCK + 1); + Super3.s_firstdatazone = first_zone_data(); + break; + default: + Super.s_imap_blocks = UPPER(inodes + 1, BITS_PER_BLOCK); + Super.s_zmap_blocks = UPPER(ctl->fs_blocks - (1 + get_nimaps() + inode_blocks()), + BITS_PER_BLOCK + 1); + Super.s_firstdatazone = first_zone_data(); + break; + } +} + +static void super_set_magic(const struct fs_control *ctl) +{ + switch (fs_version) { + case 3: + Super3.s_magic = ctl->fs_magic; + break; + default: + Super.s_magic = ctl->fs_magic; + break; + } +} + +static void setup_tables(const struct fs_control *ctl) { + unsigned long inodes, zmaps, imaps, zones, i; + + super_block_buffer = xcalloc(1, MINIX_BLOCK_SIZE); + + memset(boot_block_buffer,0,512); + super_set_magic(ctl); + + if (fs_version == 3) { + Super3.s_log_zone_size = 0; + Super3.s_blocksize = MINIX_BLOCK_SIZE; + } + else { + Super.s_log_zone_size = 0; + } + + super_init_maxsize(); + super_set_nzones(ctl); + zones = get_nzones(); + + /* some magic nrs: 1 inode / 3 blocks for smaller filesystems, + * for one inode / 16 blocks for large ones. mkfs will eventually + * crab about too far when getting close to the maximum size. */ + if (ctl->fs_inodes == 0) + if (2048 * 1024 < ctl->fs_blocks) /* 2GB */ + inodes = ctl->fs_blocks / 16; + else if (512 * 1024 < ctl->fs_blocks) /* 0.5GB */ + inodes = ctl->fs_blocks / 8; + else + inodes = ctl->fs_blocks / 3; + else + inodes = ctl->fs_inodes; + /* Round up inode count to fill block size */ + if (fs_version == 2 || fs_version == 3) + inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) & + ~(MINIX2_INODES_PER_BLOCK - 1)); + else + inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) & + ~(MINIX_INODES_PER_BLOCK - 1)); + + if (fs_version == 3) + Super3.s_ninodes = inodes; + else { + if (inodes > MINIX_MAX_INODES) + inodes = MINIX_MAX_INODES; + Super.s_ninodes = inodes; + } + super_set_map_blocks(ctl, inodes); + if (MINIX_MAX_INODES < first_zone_data()) + errx(MKFS_EX_ERROR, + _("First data block at %jd, which is too far (max %d).\n" + "Try specifying fewer inodes by passing --inodes <num>"), + (intmax_t)first_zone_data(), + MINIX_MAX_INODES); + imaps = get_nimaps(); + zmaps = get_nzmaps(); + + inode_map = xmalloc(imaps * MINIX_BLOCK_SIZE); + zone_map = xmalloc(zmaps * MINIX_BLOCK_SIZE); + memset(inode_map,0xff,imaps * MINIX_BLOCK_SIZE); + memset(zone_map,0xff,zmaps * MINIX_BLOCK_SIZE); + + for (i = get_first_zone() ; i<zones ; i++) + unmark_zone(i); + for (i = MINIX_ROOT_INO ; i<=inodes; i++) + unmark_inode(i); + + inode_buffer = xmalloc(get_inode_buffer_size()); + memset(inode_buffer,0, get_inode_buffer_size()); + + printf(P_("%lu inode\n", "%lu inodes\n", inodes), inodes); + printf(P_("%lu block\n", "%lu blocks\n", zones), zones); + printf(_("Firstdatazone=%jd (%jd)\n"), + (intmax_t)get_first_zone(), (intmax_t)first_zone_data()); + printf(_("Zonesize=%zu\n"), (size_t) MINIX_BLOCK_SIZE << get_zone_size()); + printf(_("Maxsize=%zu\n\n"),get_max_size()); +} + +/* + * Perform a test of a block; return the number of + * blocks readable/writable. + */ +static size_t do_check(const struct fs_control *ctl, char * buffer, int try, unsigned int current_block) { + ssize_t got; + + /* Seek to the correct loc. */ + if (lseek(ctl->device_fd, current_block * MINIX_BLOCK_SIZE, SEEK_SET) != + current_block * MINIX_BLOCK_SIZE ) + err(MKFS_EX_ERROR, _("%s: seek failed during testing of blocks"), + ctl->device_name); + + /* Try the read */ + got = read(ctl->device_fd, buffer, try * MINIX_BLOCK_SIZE); + if (got < 0) got = 0; + if (got & (MINIX_BLOCK_SIZE - 1 )) { + printf(_("Weird values in do_check: probably bugs\n")); + } + got /= MINIX_BLOCK_SIZE; + return got; +} + +static unsigned int currently_testing = 0; + +static void alarm_intr(int alnum __attribute__ ((__unused__))) { + unsigned long zones = get_nzones(); + + if (currently_testing >= zones) + return; + signal(SIGALRM,alarm_intr); + alarm(5); + if (!currently_testing) + return; + printf("%d ...", currently_testing); + fflush(stdout); +} + +static void check_blocks(struct fs_control *ctl) { + size_t try, got; + static char buffer[MINIX_BLOCK_SIZE * TEST_BUFFER_BLOCKS]; + unsigned long zones = get_nzones(); + unsigned long first_zone = get_first_zone(); + + currently_testing=0; + signal(SIGALRM,alarm_intr); + alarm(5); + while (currently_testing < zones) { + if (lseek(ctl->device_fd, currently_testing * MINIX_BLOCK_SIZE,SEEK_SET) != + currently_testing*MINIX_BLOCK_SIZE) + errx(MKFS_EX_ERROR, _("%s: seek failed in check_blocks"), + ctl->device_name); + try = TEST_BUFFER_BLOCKS; + if (currently_testing + try > zones) + try = zones-currently_testing; + got = do_check(ctl, buffer, try, currently_testing); + currently_testing += got; + if (got == try) + continue; + if (currently_testing < first_zone) + errx(MKFS_EX_ERROR, _("%s: bad blocks before data-area: " + "cannot make fs"), ctl->device_name); + mark_zone(currently_testing); + ctl->fs_bad_blocks++; + currently_testing++; + } + if (ctl->fs_bad_blocks > 0) + printf(P_("%d bad block\n", "%d bad blocks\n", ctl->fs_bad_blocks), ctl->fs_bad_blocks); +} + +static void get_list_blocks(struct fs_control *ctl, char *filename) { + FILE *listfile; + unsigned long blockno; + + listfile = fopen(filename,"r"); + if (listfile == NULL) + err(MKFS_EX_ERROR, _("%s: can't open file of bad blocks"), + ctl->device_name); + + while (!feof(listfile)) { + if (fscanf(listfile,"%lu\n", &blockno) != 1) { + printf(_("badblock number input error on line %d\n"), ctl->fs_bad_blocks + 1); + errx(MKFS_EX_ERROR, _("%s: cannot read badblocks file"), + ctl->device_name); + } + mark_zone(blockno); + ctl->fs_bad_blocks++; + } + fclose(listfile); + + if (ctl->fs_bad_blocks > 0) + printf(P_("%d bad block\n", "%d bad blocks\n", ctl->fs_bad_blocks), ctl->fs_bad_blocks); +} + +static int find_super_magic(const struct fs_control *ctl) +{ + switch (fs_version) { + case 1: + if (ctl->fs_namelen == 14) + return MINIX_SUPER_MAGIC; + return MINIX_SUPER_MAGIC2; + case 2: + if (ctl->fs_namelen == 14) + return MINIX2_SUPER_MAGIC; + return MINIX2_SUPER_MAGIC2; + case 3: + return MINIX3_SUPER_MAGIC; + default: + abort(); + } +} + +static void determine_device_blocks(struct fs_control *ctl, const struct stat *statbuf) +{ + unsigned long long dev_blocks = 0; + + if (S_ISBLK(statbuf->st_mode)) { + int sectorsize; + + if (blkdev_get_sector_size(ctl->device_fd, §orsize) == -1) + sectorsize = DEFAULT_SECTOR_SIZE; /* kernel < 2.3.3 */ + if (MINIX_BLOCK_SIZE < sectorsize) + errx(MKFS_EX_ERROR, _("block size smaller than physical " + "sector size of %s"), ctl->device_name); + if (blkdev_get_size(ctl->device_fd, &dev_blocks) == -1) + errx(MKFS_EX_ERROR, _("cannot determine size of %s"), ctl->device_name); + dev_blocks /= MINIX_BLOCK_SIZE; + } else if (!S_ISBLK(statbuf->st_mode)) + dev_blocks = statbuf->st_size / MINIX_BLOCK_SIZE; + if (!ctl->fs_blocks) + ctl->fs_blocks = dev_blocks; + else if (dev_blocks < ctl->fs_blocks) + errx(MKFS_EX_ERROR, + _("%s: requested blocks (%llu) exceeds available (%llu) blocks\n"), + ctl->device_name, ctl->fs_blocks, dev_blocks); + if (ctl->fs_blocks < 10) + errx(MKFS_EX_ERROR, _("%s: number of blocks too small"), ctl->device_name); + if (fs_version == 1 && ctl->fs_blocks > MINIX_MAX_INODES) + ctl->fs_blocks = MINIX_MAX_INODES; + if (ctl->fs_blocks > (4 + ((MINIX_MAX_INODES - 4) * BITS_PER_BLOCK))) + ctl->fs_blocks = 4 + ((MINIX_MAX_INODES - 4) * BITS_PER_BLOCK); /* Utter maximum: Clip. */ +} + +static void check_user_instructions(struct fs_control *ctl) +{ + switch (fs_version) { + case 1: + case 2: + if (ctl->fs_namelen == 14 || ctl->fs_namelen == 30) + ctl->fs_dirsize = ctl->fs_namelen + 2; + else + errx(MKFS_EX_ERROR, _("unsupported name length: %d"), ctl->fs_namelen); + break; + case 3: + if (ctl->fs_namelen == 60) + ctl->fs_dirsize = ctl->fs_namelen + 4; + else + errx(MKFS_EX_ERROR, _("unsupported name length: %d"), ctl->fs_namelen); + break; + default: + errx(MKFS_EX_ERROR, _("unsupported minix file system version: %d"), fs_version); + } + ctl->fs_magic = find_super_magic(ctl); +} + +int main(int argc, char ** argv) +{ + struct fs_control ctl = { + .fs_namelen = 30, /* keep in sync with DEFAULT_FS_VERSION */ + 0 + }; + int i; + struct stat statbuf; + char * listfile = NULL; + enum { + OPT_LOCK = CHAR_MAX + 1 + }; + static const struct option longopts[] = { + {"namelength", required_argument, NULL, 'n'}, + {"inodes", required_argument, NULL, 'i'}, + {"check", no_argument, NULL, 'c'}, + {"badblocks", required_argument, NULL, 'l'}, + {"version", no_argument, NULL, 'V'}, + {"help", no_argument, NULL, 'h'}, + {"lock",optional_argument, NULL, OPT_LOCK}, + {NULL, 0, NULL, 0} + }; + + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + close_stdout_atexit(); + + strutils_set_exitcode(MKFS_EX_USAGE); + + while ((i = getopt_long(argc, argv, "1v23n:i:cl:Vh", longopts, NULL)) != -1) + switch (i) { + case '1': + fs_version = 1; + break; + case 'v': /* kept for backwards compatibility */ + warnx(_("-v is ambiguous, use '-2' instead")); + /* fallthrough */ + case '2': + fs_version = 2; + break; + case '3': + fs_version = 3; + ctl.fs_namelen = 60; + break; + case 'n': + ctl.fs_namelen = strtou16_or_err(optarg, + _("failed to parse maximum length of filenames")); + break; + case 'i': + ctl.fs_inodes = strtoul_or_err(optarg, + _("failed to parse number of inodes")); + break; + case 'c': + ctl.check_blocks = 1; + break; + case 'l': + listfile = optarg; + break; + case OPT_LOCK: + ctl.lockmode = "1"; + if (optarg) { + if (*optarg == '=') + optarg++; + ctl.lockmode = optarg; + } + break; + case 'V': + print_version(MKFS_EX_OK); + case 'h': + usage(); + default: + errtryhelp(MKFS_EX_USAGE); + } + argc -= optind; + argv += optind; + if (argc > 0) { + ctl.device_name = argv[0]; + argc--; + argv++; + } + if (argc > 0) + ctl.fs_blocks = strtoul_or_err(argv[0], _("failed to parse number of blocks")); + + if (!ctl.device_name) { + warnx(_("no device specified")); + errtryhelp(MKFS_EX_USAGE); + } + check_user_instructions(&ctl); + if (is_mounted(ctl.device_name)) + errx(MKFS_EX_ERROR, _("%s is mounted; will not make a filesystem here!"), + ctl.device_name); + if (stat(ctl.device_name, &statbuf) < 0) + err(MKFS_EX_ERROR, _("stat of %s failed"), ctl.device_name); + ctl.device_fd = open_blkdev_or_file(&statbuf, ctl.device_name, O_RDWR); + if (ctl.device_fd < 0) + err(MKFS_EX_ERROR, _("cannot open %s"), ctl.device_name); + if (blkdev_lock(ctl.device_fd, ctl.device_name, ctl.lockmode) != 0) + exit(MKFS_EX_ERROR); + determine_device_blocks(&ctl, &statbuf); + setup_tables(&ctl); + if (ctl.check_blocks) + check_blocks(&ctl); + else if (listfile) + get_list_blocks(&ctl, listfile); + + make_root_inode(&ctl); + make_bad_inode(&ctl); + + mark_good_blocks(&ctl); + write_tables(&ctl); + if (close_fd(ctl.device_fd) != 0) + err(MKFS_EX_ERROR, _("write failed")); + + return MKFS_EX_OK; +} |