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factor out minix structures/constants into minix.h

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fsck_minix: optimizations
This commit is contained in:
Denis Vlasenko 2007-01-03 00:43:19 +00:00
parent 6dd392a252
commit aa95959cb8
2 changed files with 137 additions and 268 deletions
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330
util-linux/fsck_minix.c
View File

@ -90,146 +90,83 @@
#include "busybox.h"
#include <mntent.h>
/*
* 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];
};
/* Believe it or not, but mount.h has this one */
#undef BLOCK_SIZE
enum {
BLOCK_SIZE = 1024,
MINIX_ROOT_INO = 1,
MINIX_LINK_MAX = 250,
MINIX2_LINK_MAX = 65530,
MINIX_I_MAP_SLOTS = 8,
MINIX_Z_MAP_SLOTS = 64,
MINIX_SUPER_MAGIC = 0x137F, /* original minix fs */
MINIX_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. */
MINIX_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix_inode))),
MINIX2_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix2_inode))),
MINIX_V1 = 0x0001, /* original minix fs */
MINIX_V2 = 0x0002 /* minix V2 fs */
};
#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
/*
* 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 NAME_MAX 255 /* # chars in a file name */
#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
#include "minix.h"
#ifndef BLKGETSIZE
#define BLKGETSIZE _IO(0x12,96) /* return device size */
#endif
enum { ROOT_INO = 1 };
#define UPPER(size,n) ((size+((n)-1))/(n))
#define INODE_SIZE (sizeof(struct minix_inode))
#ifdef CONFIG_FEATURE_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))
#ifdef UNUSED
enum {
MINIX1_LINK_MAX = 250,
MINIX2_LINK_MAX = 65530,
MINIX_I_MAP_SLOTS = 8,
MINIX_Z_MAP_SLOTS = 64,
MINIX_V1 = 0x0001, /* original minix fs */
MINIX_V2 = 0x0002, /* minix V2 fs */
NAME_MAX = 255, /* # chars in a file name */
};
#endif
#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
#if ENABLE_FEATURE_MINIX2
static smallint version2;
#else
enum { version2 = 0 };
#endif
#define PROGRAM_VERSION "1.2 - 11/11/96"
static smallint repair, automatic, verbose, list, show, warn_mode, force;
static smallint changed; /* is filesystem modified? */
static smallint errors_uncorrected; /* flag if some error was not corrected */
static smallint termios_set;
static struct termios termios;
static char *device_name;
static int IN;
static smallint repair, automatic, verbose, list, show, warn_mode, force;
static int directory, regular, blockdev, chardev, links, symlinks, total;
static struct termios termios;
static smallint termios_set;
static smallint changed; /* flags if the filesystem has been changed */
static smallint errors_uncorrected; /* flag if some error was not corrected */
//also smallint?
static int dirsize = 16;
static int namelen = 14;
static char *inode_buffer;
#define Inode (((struct minix_inode *) inode_buffer)-1)
#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
//xzalloc?
static char super_block_buffer[BLOCK_SIZE];
#define Inode1 (((struct minix1_inode *) inode_buffer)-1)
#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
#define Super (*(struct minix_super_block *)super_block_buffer)
#define INODES ((unsigned long)Super.s_ninodes)
#ifdef CONFIG_FEATURE_MINIX2
static smallint version2;
#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
#if ENABLE_FEATURE_MINIX2
# define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
#else
#define ZONES ((unsigned long)(Super.s_nzones))
# define ZONES ((unsigned)(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)
#define INODES ((unsigned)Super.s_ninodes)
#define IMAPS ((unsigned)Super.s_imap_blocks)
#define ZMAPS ((unsigned)Super.s_zmap_blocks)
#define FIRSTZONE ((unsigned)Super.s_firstdatazone)
#define ZONESIZE ((unsigned)Super.s_log_zone_size)
#define MAXSIZE ((unsigned)Super.s_max_size)
#define MAGIC (Super.s_magic)
/* gcc likes this more (code is smaller) than macro variant */
static ATTRIBUTE_ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
{
return (size + n-1) / n;
}
#if ENABLE_FEATURE_MINIX2
#define INODE_BLOCKS div_roundup(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
: MINIX1_INODES_PER_BLOCK))
#else
#define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
#endif
#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
#define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
static char *inode_map;
static char *zone_map;
@ -237,15 +174,11 @@ static char *zone_map;
static unsigned char *inode_count;
static unsigned char *zone_count;
static void recursive_check(unsigned int ino);
#ifdef CONFIG_FEATURE_MINIX2
static void recursive_check2(unsigned int ino);
#endif
static int bit(char *a, unsigned int i)
{
return (a[i >> 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))
@ -255,6 +188,12 @@ static int bit(char *a, unsigned int i)
#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
static void recursive_check(unsigned int ino);
#if ENABLE_FEATURE_MINIX2
static void recursive_check2(unsigned int ino);
#endif
static void leave(int) ATTRIBUTE_NORETURN;
static void leave(int status)
{
@ -285,7 +224,7 @@ static void alloc_current_name(void)
name_component[0] = &current_name[0];
}
#ifdef CONFIG_FEATURE_CLEAN_UP
#if ENABLE_FEATURE_CLEAN_UP
/* execute this atexit() to deallocate name_list[] */
/* piptigger was here */
static void free_current_name(void)
@ -488,7 +427,7 @@ static void write_block(unsigned int nr, char *addr)
* It sets 'changed' if the inode has needed changing, and re-writes
* any indirect blocks with errors.
*/
static int map_block(struct minix_inode *inode, unsigned int blknr)
static int map_block(struct minix1_inode *inode, unsigned int blknr)
{
uint16_t ind[BLOCK_SIZE >> 1];
uint16_t dind[BLOCK_SIZE >> 1];
@ -523,7 +462,7 @@ static int map_block(struct minix_inode *inode, unsigned int blknr)
return result;
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static int map_block2(struct minix2_inode *inode, unsigned int blknr)
{
uint32_t ind[BLOCK_SIZE >> 2];
@ -618,12 +557,12 @@ static void get_dirsize(void)
char blk[BLOCK_SIZE];
int size;
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
if (version2)
block = Inode2[ROOT_INO].i_zone[0];
block = Inode2[MINIX_ROOT_INO].i_zone[0];
else
#endif
block = Inode[ROOT_INO].i_zone[0];
block = Inode1[MINIX_ROOT_INO].i_zone[0];
read_block(block, blk);
for (size = 16; size < BLOCK_SIZE; size <<= 1) {
if (strcmp(blk + size + 2, "..") == 0) {
@ -646,11 +585,11 @@ static void read_superblock(void)
dirsize = 16;
version2 = 0;
*/
if (MAGIC == MINIX_SUPER_MAGIC) {
} else if (MAGIC == MINIX_SUPER_MAGIC2) {
if (MAGIC == MINIX1_SUPER_MAGIC) {
} else if (MAGIC == MINIX1_SUPER_MAGIC2) {
namelen = 30;
dirsize = 32;
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
} else if (MAGIC == MINIX2_SUPER_MAGIC) {
version2 = 1;
} else if (MAGIC == MINIX2_SUPER_MAGIC2) {
@ -687,13 +626,13 @@ static void read_tables(void)
}
get_dirsize();
if (show) {
printf("%ld inodes\n"
"%ld blocks\n"
"Firstdatazone=%ld (%ld)\n"
"Zonesize=%d\n"
"Maxsize=%ld\n"
"Filesystem state=%d\n"
"namelen=%d\n\n",
printf("%u inodes\n"
"%u blocks\n"
"Firstdatazone=%u (%u)\n"
"Zonesize=%u\n"
"Maxsize=%u\n"
"Filesystem state=%u\n"
"namelen=%u\n\n",
INODES,
ZONES,
FIRSTZONE, NORM_FIRSTZONE,
@ -704,17 +643,17 @@ static void read_tables(void)
}
}
static struct minix_inode *get_inode(unsigned int nr)
static struct minix1_inode *get_inode(unsigned int nr)
{
struct minix_inode *inode;
struct minix1_inode *inode;
if (!nr || nr > INODES)
return NULL;
total++;
inode = Inode + nr;
inode = Inode1 + nr;
if (!inode_count[nr]) {
if (!inode_in_use(nr)) {
printf("Inode %d is marked as 'unused', but it is used "
printf("Inode1 %d is marked as 'unused', but it is used "
"for file '%s'\n", nr, current_name);
if (repair) {
if (ask("Mark as 'in use'", 1))
@ -749,7 +688,7 @@ static struct minix_inode *get_inode(unsigned int nr)
return inode;
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static struct minix2_inode *get_inode2(unsigned int nr)
{
struct minix2_inode *inode;
@ -760,7 +699,7 @@ static struct minix2_inode *get_inode2(unsigned int nr)
inode = Inode2 + nr;
if (!inode_count[nr]) {
if (!inode_in_use(nr)) {
printf("Inode %d is marked as 'unused', but it is used "
printf("Inode1 %d is marked as 'unused', but it is used "
"for file '%s'\n", nr, current_name);
if (repair) {
if (ask("Mark as 'in use'", 1))
@ -797,20 +736,22 @@ static struct minix2_inode *get_inode2(unsigned int nr)
static void check_root(void)
{
struct minix_inode *inode = Inode + ROOT_INO;
struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
if (!inode || !S_ISDIR(inode->i_mode))
die("root inode isn't a directory");
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void check_root2(void)
{
struct minix2_inode *inode = Inode2 + ROOT_INO;
struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
if (!inode || !S_ISDIR(inode->i_mode))
die("root inode isn't a directory");
}
#else
void check_root2(void);
#endif
static int add_zone(uint16_t *znr, smallint *corrected)
@ -843,7 +784,7 @@ static int add_zone(uint16_t *znr, smallint *corrected)
return block;
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static int add_zone2(uint32_t *znr, smallint *corrected)
{
int result;
@ -892,7 +833,7 @@ static void add_zone_ind(uint16_t *znr, smallint *corrected)
write_block(block, blk);
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void add_zone_ind2(uint32_t *znr, smallint *corrected)
{
static char blk[BLOCK_SIZE];
@ -928,7 +869,7 @@ static void add_zone_dind(uint16_t *znr, smallint *corrected)
write_block(block, blk);
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void add_zone_dind2(uint32_t *znr, smallint *corrected)
{
static char blk[BLOCK_SIZE];
@ -966,13 +907,13 @@ static void add_zone_tind2(uint32_t *znr, smallint *corrected)
static void check_zones(unsigned int i)
{
struct minix_inode *inode;
struct minix1_inode *inode;
if (!i || i > INODES)
return;
if (inode_count[i] > 1) /* have we counted this file already? */
return;
inode = Inode + i;
inode = Inode1 + i;
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
!S_ISLNK(inode->i_mode)) return;
for (i = 0; i < 7; i++)
@ -981,7 +922,7 @@ static void check_zones(unsigned int i)
add_zone_dind(8 + inode->i_zone, &changed);
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void check_zones2(unsigned int i)
{
struct minix2_inode *inode;
@ -1002,10 +943,10 @@ static void check_zones2(unsigned int i)
}
#endif
static void check_file(struct minix_inode *dir, unsigned int offset)
static void check_file(struct minix1_inode *dir, unsigned int offset)
{
static char blk[BLOCK_SIZE];
struct minix_inode *inode;
struct minix1_inode *inode;
int ino;
char *name;
int block;
@ -1052,7 +993,7 @@ static void check_file(struct minix_inode *dir, unsigned int offset)
pop_filename();
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void check_file2(struct minix2_inode *dir, unsigned int offset)
{
static char blk[BLOCK_SIZE];
@ -1106,10 +1047,10 @@ static void check_file2(struct minix2_inode *dir, unsigned int offset)
static void recursive_check(unsigned int ino)
{
struct minix_inode *dir;
struct minix1_inode *dir;
unsigned int offset;
dir = Inode + ino;
dir = Inode1 + ino;
if (!S_ISDIR(dir->i_mode))
die("internal error");
if (dir->i_size < 2 * dirsize) {
@ -1120,7 +1061,7 @@ static void recursive_check(unsigned int ino)
check_file(dir, offset);
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void recursive_check2(unsigned int ino)
{
struct minix2_inode *dir;
@ -1152,10 +1093,10 @@ static void check_counts(void)
int i;
for (i = 1; i <= INODES; i++) {
if (warn_mode && Inode[i].i_mode && !inode_in_use(i)) {
printf("Inode %d has non-zero mode. ", i);
if (warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
printf("Inode1 %d has non-zero mode. ", i);
if (ask("Clear", 1)) {
Inode[i].i_mode = 0;
Inode1[i].i_mode = 0;
changed = 1;
}
}
@ -1168,15 +1109,15 @@ static void check_counts(void)
continue;
}
if (!inode_in_use(i)) {
printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
printf("Inode1 %d is used, but marked as 'unused' in the bitmap. ", i);
if (ask("Set", 1))
mark_inode(i);
}
if (Inode[i].i_nlinks != inode_count[i]) {
printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
if (Inode1[i].i_nlinks != inode_count[i]) {
printf("Inode1 %d (mode=%07o), i_nlinks=%d, counted=%d. ",
i, Inode1[i].i_mode, Inode1[i].i_nlinks, inode_count[i]);
if (ask("Set i_nlinks to count", 1)) {
Inode[i].i_nlinks = inode_count[i];
Inode1[i].i_nlinks = inode_count[i];
changed = 1;
}
}
@ -1197,14 +1138,14 @@ static void check_counts(void)
}
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void check_counts2(void)
{
int i;
for (i = 1; i <= INODES; i++) {
if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
printf("Inode %d has non-zero mode. ", i);
printf("Inode1 %d has non-zero mode. ", i);
if (ask("Clear", 1)) {
Inode2[i].i_mode = 0;
changed = 1;
@ -1219,7 +1160,7 @@ static void check_counts2(void)
continue;
}
if (!inode_in_use(i)) {
printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
printf("Inode1 %d is used, but marked as 'unused' in the bitmap. ", i);
if (ask("Set", 1))
mark_inode(i);
}
@ -1254,20 +1195,22 @@ static void check(void)
{
memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
memset(zone_count, 0, ZONES * sizeof(*zone_count));
check_zones(ROOT_INO);
recursive_check(ROOT_INO);
check_zones(MINIX_ROOT_INO);
recursive_check(MINIX_ROOT_INO);
check_counts();
}
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
static void check2(void)
{
memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
memset(zone_count, 0, ZONES * sizeof(*zone_count));
check_zones2(ROOT_INO);
recursive_check2(ROOT_INO);
check_zones2(MINIX_ROOT_INO);
recursive_check2(MINIX_ROOT_INO);
check_counts2();
}
#else
void check2(void);
#endif
int fsck_minix_main(int argc, char **argv)
@ -1275,18 +1218,18 @@ int fsck_minix_main(int argc, char **argv)
struct termios tmp;
int retcode = 0;
xfunc_exitcode = 8;
xfunc_error_retval = 8;
alloc_current_name();
#ifdef CONFIG_FEATURE_CLEAN_UP
#if ENABLE_FEATURE_CLEAN_UP
/* Don't bother to free memory. Exit does
* that automagically, so we can save a few bytes */
atexit(free_current_name);
#endif
if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
die("bad inode size");
#ifdef CONFIG_FEATURE_MINIX2
#if ENABLE_FEATURE_MINIX2
if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
die("bad v2 inode size");
#endif
@ -1336,10 +1279,8 @@ int fsck_minix_main(int argc, char **argv)
if (!isatty(0) || !isatty(1))
die("need terminal for interactive repairs");
}
IN = open(device_name, repair ? O_RDWR : O_RDONLY);
if (IN < 0) {
bb_error_msg_and_die("cannot open device '%s'", device_name);
}
IN = xopen(device_name, repair ? O_RDWR : O_RDONLY);
/*sync(); paranoia? */
read_superblock();
@ -1372,36 +1313,35 @@ int fsck_minix_main(int argc, char **argv)
tcsetattr(0, TCSANOW, &tmp);
termios_set = 1;
}
#ifdef CONFIG_FEATURE_MINIX2
if (version2) {
check_root2();
check2();
} else
#endif
{
} else {
check_root();
check();
}
if (verbose) {
int i, free_cnt;
for (i = 1, free_cnt = 0; i <= INODES; i++)
if (!inode_in_use(i))
free_cnt++;
printf("\n%6ld inodes used (%ld%%)\n", (INODES - free_cnt),
printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
100 * (INODES - free_cnt) / INODES);
for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
if (!zone_in_use(i))
free_cnt++;
printf("%6ld zones used (%ld%%)\n\n"
"%6d regular files\n"
"%6d directories\n"
"%6d character device files\n"
"%6d block device files\n"
"%6d links\n"
"%6d symbolic links\n"
printf("%6u zones used (%u%%)\n\n"
"%6u regular files\n"
"%6u directories\n"
"%6u character device files\n"
"%6u block device files\n"
"%6u links\n"
"%6u symbolic links\n"
"------\n"
"%6d files\n",
"%6u files\n",
(ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
regular, directory, chardev, blockdev,
links - 2 * directory + 1, symlinks,

75
util-linux/mkfs_minix.c
View File

@ -65,6 +65,8 @@
#include "busybox.h"
#include <mntent.h>
#include "minix.h"
#define DEBUG 0
/* If debugging, store the very same times/uids/gids for image consistency */
@ -78,81 +80,8 @@
# 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,
};