/*
* 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.
*/
/*
* Modified for BusyBox by Erik Andersen <andersen@debian.org> --
* removed getopt based parser and added a hand rolled one.
*/
-
-#include "busybox.h"
+//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 <mntent.h>
-#define DEBUG 0
+#include "minix.h"
-/* If debugging, store the very same times/uids/gids for image consistency */
-#if DEBUG
+/* Store the very same times/uids/gids for image consistency */
+#if 1
# define CUR_TIME 0
# define GETUID 0
# define GETGID 0
#else
+/* Was using this. Is it useful? NB: this will break testsuite */
# define CUR_TIME time(NULL)
# define GETUID getuid()
# define GETGID getgid()
#endif
-/*
- * This is the original minix inode layout on disk.
- * Note the 8-bit gid and atime and ctime.
- */
-struct minix1_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];
-};
-
-/* Believe it or not, but mount.h has this one */
-#undef BLOCK_SIZE
enum {
- BLOCK_SIZE = 1024,
- BITS_PER_BLOCK = BLOCK_SIZE << 3,
-
- MINIX_ROOT_INO = 1,
- MINIX_BAD_INO = 2,
MAX_GOOD_BLOCKS = 512,
-
- MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
- MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
- MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
- MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
- MINIX_VALID_FS = 0x0001, /* clean fs */
- MINIX_ERROR_FS = 0x0002, /* fs has errors */
-
- INODE_SIZE1 = sizeof(struct minix1_inode),
- INODE_SIZE2 = sizeof(struct minix2_inode),
- MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
- MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
-
TEST_BUFFER_BLOCKS = 16,
};
-#if ENABLE_FEATURE_MINIX2
-static int version2;
-#else
+#if !ENABLE_FEATURE_MINIX2
enum { version2 = 0 };
#endif
-static char *device_name;
-static int dev_fd = -1;
-static uint32_t total_blocks;
-static int badblocks;
-/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
-static int namelen = 30;
-static int dirsize = 32;
-static int magic = MINIX1_SUPER_MAGIC2;
-
-static char root_block[BLOCK_SIZE];
-static char super_block_buffer[BLOCK_SIZE];
-static char boot_block_buffer[512];
-static char *inode_buffer;
+enum { dev_fd = 3 };
-static char *inode_map;
-static char *zone_map;
-
-static int used_good_blocks;
-static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
-static unsigned long req_nr_inodes;
+struct globals {
+#if ENABLE_FEATURE_MINIX2
+ smallint version2;
+#define version2 G.version2
+#endif
+ char *device_name;
+ uint32_t total_blocks;
+ int badblocks;
+ int namelen;
+ int dirsize;
+ int magic;
+ char *inode_buffer;
+ char *inode_map;
+ char *zone_map;
+ int used_good_blocks;
+ unsigned long req_nr_inodes;
+ unsigned currently_testing;
+
+ char root_block[BLOCK_SIZE];
+ char superblock_buffer[BLOCK_SIZE];
+ char boot_block_buffer[512];
+ unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
+ /* check_blocks(): buffer[] was the biggest static in entire bbox */
+ char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
+
+ unsigned short ind_block1[BLOCK_SIZE >> 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)
-extern inline unsigned div_roundup(unsigned size, unsigned n)
+static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
{
return (size + n-1) / n;
}
-#define INODE_BUF1 (((struct minix1_inode*)inode_buffer) - 1)
-#define INODE_BUF2 (((struct minix2_inode*)inode_buffer) - 1)
+#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
+#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
-#define SB (*(struct minix_super_block*)super_block_buffer)
+#define SB (*(struct minix_superblock*)G.superblock_buffer)
#define SB_INODES (SB.s_ninodes)
#define SB_IMAPS (SB.s_imap_blocks)
#else
# 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)
+ (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
#endif
#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
-static int bit(const char* a, unsigned i)
+/* Before you ask "where they come from?": */
+/* setbit/clrbit are supplied by sys/param.h */
+
+static int minix_bit(const char* a, unsigned i)
{
- return a[i >> 3] & (1<<(i & 7));
+ return a[i >> 3] & (1<<(i & 7));
}
-/* Note: do not assume 0/1, it is 0/nonzero */
-#define inode_in_use(x) bit(inode_map,(x))
-#define zone_in_use(x) bit(zone_map,(x)-SB_FIRSTZONE+1)
-
-#define mark_inode(x) setbit(inode_map,(x))
-#define unmark_inode(x) clrbit(inode_map,(x))
-#define mark_zone(x) setbit(zone_map,(x)-SB_FIRSTZONE+1)
-#define unmark_zone(x) clrbit(zone_map,(x)-SB_FIRSTZONE+1)
-
-#ifndef BLKGETSIZE
-# define BLKGETSIZE _IO(0x12,96) /* return device size */
-#endif
-
-
-static long valid_offset(int fd, int offset)
+static void minix_setbit(char *a, unsigned i)
{
- char ch;
-
- if (lseek(fd, offset, SEEK_SET) < 0)
- return 0;
- if (read(fd, &ch, 1) < 1)
- return 0;
- return 1;
+ setbit(a, i);
}
-
-static int count_blocks(int fd)
+static void minix_clrbit(char *a, unsigned i)
{
- 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);
+ clrbit(a, i);
}
-static int get_size(const char *file)
-{
- int fd;
- long size;
+/* 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))*/
- fd = xopen(file, O_RDWR);
- if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
- close(fd);
- return (size * 512);
- }
+#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)
- size = count_blocks(fd);
- close(fd);
- return size;
-}
+#ifndef BLKGETSIZE
+# define BLKGETSIZE _IO(0x12,96) /* return device size */
+#endif
static void write_tables(void)
{
- /* Mark the super block valid. */
+ /* Mark the superblock valid. */
SB.s_state |= MINIX_VALID_FS;
SB.s_state &= ~MINIX_ERROR_FS;
msg_eol = "seek to 0 failed";
xlseek(dev_fd, 0, SEEK_SET);
- msg_eol = "cannot clear boot sector";
- xwrite(dev_fd, boot_block_buffer, 512);
+ msg_eol = "can't clear boot sector";
+ xwrite(dev_fd, G.boot_block_buffer, 512);
msg_eol = "seek to BLOCK_SIZE failed";
xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
- msg_eol = "cannot write superblock";
- xwrite(dev_fd, super_block_buffer, BLOCK_SIZE);
+ msg_eol = "can't write superblock";
+ xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
- msg_eol = "cannot write inode map";
- xwrite(dev_fd, inode_map, SB_IMAPS * BLOCK_SIZE);
+ msg_eol = "can't write inode map";
+ xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
- msg_eol = "cannot write zone map";
- xwrite(dev_fd, zone_map, SB_ZMAPS * BLOCK_SIZE);
+ msg_eol = "can't write zone map";
+ xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
- msg_eol = "cannot write inodes";
- xwrite(dev_fd, inode_buffer, INODE_BUFFER_SIZE);
+ msg_eol = "can't write inodes";
+ xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
msg_eol = "\n";
}
{
int blk;
- if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
+ if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
bb_error_msg_and_die("too many bad blocks");
- if (used_good_blocks)
- blk = good_blocks_table[used_good_blocks - 1] + 1;
+ if (G.used_good_blocks)
+ blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
else
blk = SB_FIRSTZONE;
while (blk < SB_ZONES && zone_in_use(blk))
blk++;
if (blk >= SB_ZONES)
bb_error_msg_and_die("not enough good blocks");
- good_blocks_table[used_good_blocks] = blk;
- used_good_blocks++;
+ G.good_blocks_table[G.used_good_blocks] = blk;
+ G.used_good_blocks++;
return blk;
}
{
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]);
}
static int next(int zone)
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;
/* 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;
write_block(ind, (char *) ind_block);
if (dind)
write_block(dind, (char *) dind_block);
+#undef ind_block
+#undef dind_block
}
#if ENABLE_FEATURE_MINIX2
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 = 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;
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)
inode->i_zone[0] = get_free_block();
inode->i_nlinks = 2;
inode->i_time = CUR_TIME;
- if (badblocks)
- inode->i_size = 3 * dirsize;
+ 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;
if (inode->i_uid)
inode->i_gid = GETGID;
- write_block(inode->i_zone[0], root_block);
+ write_block(inode->i_zone[0], G.root_block);
}
#if ENABLE_FEATURE_MINIX2
inode->i_zone[0] = get_free_block();
inode->i_nlinks = 2;
inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
- if (badblocks)
- inode->i_size = 3 * dirsize;
+ 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;
if (inode->i_uid)
inode->i_gid = GETGID;
- write_block(inode->i_zone[0], root_block);
+ 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);
- SB_MAGIC = magic;
- SB_ZONE_SIZE = 0;
- SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
- if (version2)
- SB.s_zones = total_blocks;
- else
- SB.s_nzones = total_blocks;
-
- /* some magic nrs: 1 inode / 3 blocks */
- if (req_nr_inodes == 0)
- inodes = total_blocks / 3;
- else
- inodes = 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 uses previous value of SB_ZMAPS inside */
- i = 999;
- SB_ZMAPS = 0;
- do {
- uint16_t t = div_roundup(total_blocks - NORM_FIRSTZONE + 1, BITS_PER_BLOCK);
- if (SB_ZMAPS == t) goto got_it;
- SB_ZMAPS = t;
- } while (--i);
- bb_error_msg_and_die("incompatible size/inode count, try different -i N");
- got_it:
-
- SB_FIRSTZONE = NORM_FIRSTZONE;
- inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
- zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
- memset(inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
- memset(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);
- inode_buffer = xzalloc(INODE_BUFFER_SIZE);
- printf("%ld inodes\n", (long)SB_INODES);
- printf("%ld blocks\n", (long)SB_ZONES);
- printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)NORM_FIRSTZONE);
- printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
- printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
-}
-
/*
* Perform a test of a block; return the number of
- * blocks readable/writable.
+ * blocks readable.
*/
-static long do_check(char *buffer, int try, unsigned 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. */
msg_eol = "seek failed during testing of blocks";
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 currently_testing;
+ 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 >= SB_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 < SB_ZONES) {
+ while (G.currently_testing < SB_ZONES) {
msg_eol = "seek failed in check_blocks";
- xlseek(dev_fd, currently_testing * BLOCK_SIZE, SEEK_SET);
+ xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
msg_eol = "\n";
try = TEST_BUFFER_BLOCKS;
- if (currently_testing + try > SB_ZONES)
- try = SB_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 < SB_FIRSTZONE)
+ if (G.currently_testing < SB_FIRSTZONE)
bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
- mark_zone(currently_testing);
- badblocks++;
- currently_testing++;
+ mark_zone(G.currently_testing);
+ G.badblocks++;
+ G.currently_testing++;
}
- printf("%d bad block(s)\n", badblocks);
+ alarm(0);
+ printf("%d bad block(s)\n", G.badblocks);
}
static void get_list_blocks(char *filename)
FILE *listfile;
unsigned long blockno;
- listfile = xfopen(filename, "r");
+ listfile = xfopen_for_read(filename);
while (!feof(listfile)) {
- fscanf(listfile, "%ld\n", &blockno);
+ fscanf(listfile, "%lu\n", &blockno);
mark_zone(blockno);
- badblocks++;
+ G.badblocks++;
}
- printf("%d bad block(s)\n", badblocks);
+ printf("%d bad block(s)\n", G.badblocks);
+}
+
+static void setup_tables(void)
+{
+ 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)
+int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
{
- struct mntent *mp;
unsigned opt;
char *tmp;
- struct stat statbuf;
- char *str_i, *str_n;
+ char *str_i;
char *listfile = NULL;
+ 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
bb_error_msg_and_die("bad inode size");
#endif
- opt = getopt32(argc, argv, "ci:l:n:v", &str_i, &listfile, &str_n);
+ opt = getopt32(argv, "ci:l:n:+v", &str_i, &listfile, &G.namelen);
argv += optind;
//if (opt & 1) -c
- if (opt & 2) req_nr_inodes = xatoul(str_i); // -i
+ if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
//if (opt & 4) -l
if (opt & 8) { // -n
- namelen = xatoi_u(str_n);
- if (namelen == 14) magic = MINIX1_SUPER_MAGIC;
- else if (namelen == 30) magic = MINIX1_SUPER_MAGIC2;
+ if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
+ else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
else bb_show_usage();
- dirsize = namelen + 2;
+ G.dirsize = G.namelen + 2;
}
if (opt & 0x10) { // -v
#if ENABLE_FEATURE_MINIX2
version2 = 1;
#else
- bb_error_msg_and_die("%s: not compiled with minix v2 support",
- device_name);
+ bb_error_msg_and_die("not compiled with minix v2 support");
#endif
}
- device_name = *argv++;
- if (!device_name)
+ G.device_name = argv[0];
+ if (!G.device_name)
bb_show_usage();
- if (*argv)
- total_blocks = xatou32(*argv);
- else
- total_blocks = get_size(device_name) / 1024;
- if (total_blocks < 10)
+ /* 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) {
- magic = MINIX2_SUPER_MAGIC2;
- if (namelen == 14)
- magic = MINIX2_SUPER_MAGIC;
- } else if (total_blocks > 65535)
- total_blocks = 65535;
-
- /* Check if it is mounted */
- mp = find_mount_point(device_name, NULL);
- if (mp && strcmp(device_name, mp->mnt_fsname) == 0)
- bb_error_msg_and_die("%s is mounted on %s; "
- "refusing to make a filesystem",
- device_name, mp->mnt_dir);
-
- dev_fd = xopen(device_name, O_RDWR);
- if (fstat(dev_fd, &statbuf) < 0)
- bb_error_msg_and_die("cannot stat %s", device_name);
+ 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?... */
-#if 0
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'", device_name);
+ "to make filesystem on '%s'", G.device_name);
#endif
-
- 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");
projects / oweals / busybox.git / blobdiff