+/* vi: set sw=4 ts=4: */
/*
* 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 tarball for details.
*/
/*
* 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)
*
* 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 <andersen@debian.org> --
+ * removed getopt based parser and added a hand rolled one.
*/
-#include "internal.h"
-#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 <sys/ioctl.h>
+#include "libbb.h"
#include <mntent.h>
-#include <getopt.h>
-#include <linux/fs.h>
-#include <linux/minix_fs.h>
+#include "minix.h"
-#ifdef MINIX2_SUPER_MAGIC2
-#define HAVE_MINIX2 1
+/* 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
-#ifndef __GNUC__
-#error "needs gcc for the bitop-__asm__'s"
-#endif
+enum {
+ MAX_GOOD_BLOCKS = 512,
+ TEST_BUFFER_BLOCKS = 16,
+};
-#ifndef __linux__
-#define volatile
+#if !ENABLE_FEATURE_MINIX2
+enum { version2 = 0 };
#endif
-#define MINIX_ROOT_INO 1
-#define MINIX_BAD_INO 2
-
-#define TEST_BUFFER_BLOCKS 16
-#define MAX_GOOD_BLOCKS 512
+enum { dev_fd = 3 };
-#define UPPER(size,n) (((size)+((n)-1))/(n))
-#define INODE_SIZE (sizeof(struct minix_inode))
-#ifdef HAVE_MINIX2
-#define INODE_SIZE2 (sizeof(struct minix2_inode))
-#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
- : MINIX_INODES_PER_BLOCK))
-#else
-#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
-#endif
-#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
-
-#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
-
-static char * program_name = "mkfs";
-static char * device_name = NULL;
-static int DEV = -1;
-static long BLOCKS = 0;
-static int check = 0;
-static int badblocks = 0;
-static int namelen = 30; /* default (changed to 30, per Linus's
- suggestion, Sun Nov 21 08:05:07 1993) */
-static int dirsize = 32;
-static int magic = MINIX_SUPER_MAGIC2;
-static int version2 = 0;
-
-static char root_block[BLOCK_SIZE] = "\0";
-
-static char * inode_buffer = NULL;
-#define Inode (((struct minix_inode *) inode_buffer)-1)
-#ifdef HAVE_MINIX2
-#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
+struct globals {
+#if ENABLE_FEATURE_MINIX2
+ smallint version2;
+#define version2 G.version2
#endif
-static char super_block_buffer[BLOCK_SIZE];
-static char boot_block_buffer[512];
-#define Super (*(struct minix_super_block *)super_block_buffer)
-#define INODES ((unsigned long)Super.s_ninodes)
-#ifdef HAVE_MINIX2
-#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
-#else
-#define ZONES ((unsigned long)(Super.s_nzones))
-#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)
+ 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)
+
+static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
+{
+ return (size + n-1) / n;
+}
-static char *inode_map;
-static char *zone_map;
+#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
+#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
-static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
-static int used_good_blocks = 0;
-static unsigned long req_nr_inodes = 0;
+#define SB (*(struct minix_superblock*)G.superblock_buffer)
-#define inode_in_use(x) (bit(inode_map,(x)))
-#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
+#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 mark_inode(x) (setbit(inode_map,(x)))
-#define unmark_inode(x) (clrbit(inode_map,(x)))
+#if !ENABLE_FEATURE_MINIX2
+# define SB_ZONES (SB.s_nzones)
+# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
+#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))
+#endif
-#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
-#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
+#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
+#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
-/*
- * 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);
-}
+/* Before you ask "where they come from?": */
+/* setbit/clrbit are supplied by sys/param.h */
-static volatile void show_usage()
+static int minix_bit(const char* a, unsigned i)
{
- fprintf(stderr, "%s\n", program_name);
- fprintf(stderr,
- "Usage: %s [-c | -l filename] [-nXX] [-iXX] /dev/name [blocks]\n",
- program_name);
- exit(16);
+ return a[i >> 3] & (1<<(i & 7));
}
-/*
- * 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_setbit(char *a, unsigned i)
{
- FILE * f;
- struct mntent * mnt;
+ setbit(a, i);
+}
+static void minix_clrbit(char *a, unsigned i)
+{
+ 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 long valid_offset(int fd, int offset)
{
char ch;
- if (lseek (fd, offset, 0) < 0)
+ if (lseek(fd, offset, SEEK_SET) < 0)
return 0;
- if (read (fd, &ch, 1) < 1)
+ if (read(fd, &ch, 1) < 1)
return 0;
return 1;
}
-static int count_blocks (int fd)
+static int count_blocks(int fd)
{
int high, low;
low = 0;
- for (high = 1; valid_offset (fd, high); high *= 2)
+ for (high = 1; valid_offset(fd, high); high *= 2)
low = high;
- while (low < high - 1)
- {
+
+ while (low < high - 1) {
const int mid = (low + high) / 2;
- if (valid_offset (fd, mid))
+ if (valid_offset(fd, mid))
low = mid;
else
high = mid;
}
- valid_offset (fd, 0);
+ valid_offset(fd, 0);
return (low + 1);
}
-static int get_size(const char *file)
+static int get_size(const char *file)
{
- int fd;
- long size;
+ int fd;
+ long size;
- fd = open(file, O_RDWR);
- if (fd < 0) {
- perror(file);
- exit(1);
- }
+ fd = xopen(file, O_RDWR);
if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
close(fd);
return (size * 512);
}
-
+
size = count_blocks(fd);
close(fd);
return 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");
-
+ /* 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, 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, G.superblock_buffer, BLOCK_SIZE);
+
+ msg_eol = "cannot write inode map";
+ xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
+
+ msg_eol = "cannot write zone map";
+ xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
+
+ msg_eol = "cannot write inodes";
+ xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
+
+ msg_eol = "\n";
}
-static void write_block(int blk, char * buffer)
+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;
}
{
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;
static void make_bad_inode(void)
{
- struct minix_inode * inode = &Inode[MINIX_BAD_INO];
- int i,j,zone;
- int ind=0,dind=0;
- unsigned short ind_block[BLOCK_SIZE>>1];
- unsigned short dind_block[BLOCK_SIZE>>1];
+ 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++) {
+ 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();
- memset(ind_block,0,BLOCK_SIZE);
- for (i=0 ; i<512 ; i++) {
+ memset(ind_block, 0, 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();
- memset(dind_block,0,BLOCK_SIZE);
- for (i=0 ; i<512 ; i++) {
- write_block(ind,(char *) ind_block);
+ memset(dind_block, 0, BLOCK_SIZE);
+ for (i = 0; i < 512; i++) {
+ write_block(ind, (char *) ind_block);
dind_block[i] = ind = get_free_block();
- memset(ind_block,0,BLOCK_SIZE);
- for (j=0 ; j<512 ; j++) {
+ memset(ind_block, 0, BLOCK_SIZE);
+ for (j = 0; j < 512; j++) {
ind_block[j] = zone;
if (!NEXT_BAD)
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 HAVE_MINIX2
-static void
-make_bad_inode2 (void)
+#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);
+ 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;
- zone = next (0);
+ inode->i_size = G.badblocks * 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 ();
- memset (ind_block, 0, BLOCK_SIZE);
+ inode->i_zone[7] = ind = get_free_block();
+ memset(ind_block, 0, 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 ();
- memset (dind_block, 0, BLOCK_SIZE);
+ inode->i_zone[8] = dind = get_free_block();
+ memset(dind_block, 0, BLOCK_SIZE);
for (i = 0; i < 256; i++) {
- write_block (ind, (char *) ind_block);
- dind_block[i] = ind = get_free_block ();
- memset (ind_block, 0, BLOCK_SIZE);
+ write_block(ind, (char *) ind_block);
+ dind_block[i] = ind = get_free_block();
+ memset(ind_block, 0, BLOCK_SIZE);
for (j = 0; j < 256; j++) {
ind_block[j] = zone;
if (!NEXT_BAD)
}
}
/* 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);
+ write_block(ind, (char *) ind_block);
if (dind)
- write_block (dind, (char *) dind_block);
+ 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 HAVE_MINIX2
-static void
-make_root_inode2 (void)
+#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 ();
+ 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 HAVE_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 = malloc(IMAPS * BLOCK_SIZE);
- zone_map = malloc(ZMAPS * BLOCK_SIZE);
- if (!inode_map || !zone_map)
- die("unable to allocate buffers for maps");
- 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 = malloc(INODE_BUFFER_SIZE);
- if (!inode_buffer)
- die("unable to allocate buffer for inodes");
- 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;
-
- /* 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");
- }
+ ssize_t got;
+ /* Seek to the correct loc. */
+ 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);
- if (got < 0) got = 0;
- if (got & (BLOCK_SIZE - 1 )) {
- printf("Weird values in do_check: probably bugs\n");
- }
- got /= BLOCK_SIZE;
- return got;
+ got = read(dev_fd, buffer, try * BLOCK_SIZE);
+ if (got < 0)
+ got = 0;
+ try = ((size_t)got) / BLOCK_SIZE;
+
+ if (got & (BLOCK_SIZE - 1))
+ fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
+ return try;
}
-static unsigned int currently_testing = 0;
-
-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);
+ signal(SIGALRM, alarm_intr);
alarm(5);
- if (!currently_testing)
+ if (!G.currently_testing)
return;
- printf("%d ...", currently_testing);
+ printf("%d ...", G.currently_testing);
fflush(stdout);
}
static void check_blocks(void)
{
- int try,got;
- static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
+ size_t try, got;
- currently_testing=0;
- signal(SIGALRM,alarm_intr);
+ 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 = xfopen_for_read(filename);
+ while (!feof(listfile)) {
+ fscanf(listfile, "%ld\n", &blockno);
+ mark_zone(blockno);
+ G.badblocks++;
+ }
+ printf("%d bad block(s)\n", G.badblocks);
+}
+static void setup_tables(void)
{
- FILE *listfile;
- unsigned long blockno;
-
- listfile=fopen(filename,"r");
- if(listfile == (FILE *)NULL) {
- die("can't open file of bad blocks");
- }
- while(!feof(listfile)) {
- fscanf(listfile,"%ld\n", &blockno);
- mark_zone(blockno);
- badblocks++;
- }
- if(badblocks > 1)
- printf("%d bad blocks\n", badblocks);
- else if (badblocks == 1)
- printf("one bad block\n");
+ 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("%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);
}
-extern 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)
{
- int i;
- char * tmp;
- struct stat statbuf;
- char * listfile = NULL;
-
- if (argc && *argv)
- program_name = *argv;
- if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
- die("bad inode size");
-#ifdef HAVE_MINIX2
- if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
- die("bad inode size");
+ struct mntent *mp;
+ unsigned opt;
+ char *tmp;
+ struct stat statbuf;
+ 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
+ if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
+ bb_error_msg_and_die("bad inode size");
#endif
- opterr = 0;
- while ((i = getopt(argc, argv, "ci:l:n:v")) != EOF)
- switch (i) {
- case 'c':
- check=1; break;
- case 'i':
- req_nr_inodes = (unsigned long) atol(optarg);
- break;
- case 'l':
- listfile = optarg; break;
- case 'n':
- i = strtoul(optarg,&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;
- break;
- case 'v':
-#ifdef HAVE_MINIX2
- version2 = 1;
+
+ opt_complementary = "n+"; /* -n N */
+ 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
- fprintf(stderr,"%s: not compiled with minix v2 support\n",program_name,device_name);
- exit(-1);
-#endif
- break;
- default:
- show_usage();
- }
- argc -= optind;
- argv += optind;
- if (argc > 0 && !device_name) {
- device_name = argv[0];
- argc--;
- argv++;
- }
- if (argc > 0) {
- BLOCKS = strtol(argv[0],&tmp,0);
- if (*tmp) {
- printf("strtol error: number of blocks not specified");
- show_usage();
- }
- }
-
- if (device_name && !BLOCKS)
- BLOCKS = get_size (device_name) / 1024;
- if (!device_name || BLOCKS<10) {
- show_usage();
- }
-#ifdef HAVE_MINIX2
- if (version2) {
- if (namelen == 14)
- magic = MINIX2_SUPER_MAGIC;
- else
- magic = MINIX2_SUPER_MAGIC2;
- } else
+ bb_error_msg_and_die("not compiled with minix v2 support");
#endif
- if (BLOCKS > 65535)
- BLOCKS = 65535;
- check_mount(); /* is it already mounted? */
- tmp = root_block;
- *(short *)tmp = 1;
- strcpy(tmp+2,".");
- tmp += dirsize;
- *(short *)tmp = 1;
- strcpy(tmp+2,"..");
- tmp += 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)
- check_blocks();
- else if (listfile)
- get_list_blocks(listfile);
-#ifdef HAVE_MINIX2
- if (version2) {
- make_root_inode2 ();
- make_bad_inode2 ();
- } else
+ }
+
+ G.device_name = *argv++;
+ if (!G.device_name)
+ bb_show_usage();
+ if (*argv)
+ G.total_blocks = xatou32(*argv);
+ else
+ G.total_blocks = get_size(G.device_name) / 1024;
+
+ if (G.total_blocks < 10)
+ bb_error_msg_and_die("must have at least 10 blocks");
+
+ if (version2) {
+ G.magic = MINIX2_SUPER_MAGIC2;
+ if (G.namelen == 14)
+ G.magic = MINIX2_SUPER_MAGIC;
+ } else if (G.total_blocks > 65535)
+ G.total_blocks = 65535;
+
+ /* Check if it is mounted */
+ mp = find_mount_point(G.device_name, NULL);
+ if (mp && strcmp(G.device_name, mp->mnt_fsname) == 0)
+ bb_error_msg_and_die("%s is mounted on %s; "
+ "refusing to make a filesystem",
+ G.device_name, mp->mnt_dir);
+
+ xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
+ if (fstat(dev_fd, &statbuf) < 0)
+ bb_error_msg_and_die("cannot stat %s", G.device_name);
+ if (!S_ISBLK(statbuf.st_mode))
+ opt &= ~1; // clear -c (check)
+
+/* 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'", G.device_name);
#endif
- {
- make_root_inode();
- make_bad_inode();
- }
- mark_good_blocks();
- write_tables();
- return 0;
+
+ tmp = G.root_block;
+ *(short *) tmp = 1;
+ strcpy(tmp + 2, ".");
+ tmp += G.dirsize;
+ *(short *) tmp = 1;
+ strcpy(tmp + 2, "..");
+ tmp += G.dirsize;
+ *(short *) tmp = 2;
+ strcpy(tmp + 2, ".badblocks");
+
+ setup_tables();
+
+ if (opt & 1) // -c ?
+ check_blocks();
+ else if (listfile)
+ get_list_blocks(listfile);
+
+ if (version2) {
+ make_root_inode2();
+ make_bad_inode2();
+ } else {
+ make_root_inode();
+ make_bad_inode();
+ }
+
+ mark_good_blocks();
+ write_tables();
+ return 0;
}
projects / oweals / busybox.git / blobdiff