Differential D25563 Diff 74089 head/sbin/newfs_msdos/mkfs_msdos.c

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head/sbin/newfs_msdos/mkfs_msdos.c

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#include <sys/disk/bsd.h>		#include <sys/disk/bsd.h>
#else		#else
#include <sys/fdcio.h>		#include <sys/fdcio.h>
#include <sys/disk.h>		#include <sys/disk.h>
#include <sys/disklabel.h>		#include <sys/disklabel.h>
#include <sys/mount.h>		#include <sys/mount.h>
#endif		#endif
#include <sys/stat.h>		#include <sys/stat.h>
		#include <sys/sysctl.h>
#include <sys/time.h>		#include <sys/time.h>

		#include <assert.h>
#include <ctype.h>		#include <ctype.h>
#include <err.h>		#include <err.h>
#include <errno.h>		#include <errno.h>
#include <fcntl.h>		#include <fcntl.h>
#include <inttypes.h>		#include <inttypes.h>
#include <paths.h>		#include <paths.h>
#include <signal.h>		#include <signal.h>
#include <stdio.h>		#include <stdio.h>
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#define RESFTE 2 /* reserved FAT entries */		#define RESFTE 2 /* reserved FAT entries */
#define MINCLS12 1U /* minimum FAT12 clusters */		#define MINCLS12 1U /* minimum FAT12 clusters */
#define MINCLS16 0xff5U /* minimum FAT16 clusters */		#define MINCLS16 0xff5U /* minimum FAT16 clusters */
#define MINCLS32 0xfff5U /* minimum FAT32 clusters */		#define MINCLS32 0xfff5U /* minimum FAT32 clusters */
#define MAXCLS12 0xff4U /* maximum FAT12 clusters */		#define MAXCLS12 0xff4U /* maximum FAT12 clusters */
#define MAXCLS16 0xfff4U /* maximum FAT16 clusters */		#define MAXCLS16 0xfff4U /* maximum FAT16 clusters */
#define MAXCLS32 0xffffff4U /* maximum FAT32 clusters */		#define MAXCLS32 0xffffff4U /* maximum FAT32 clusters */

#ifndef CTASSERT
#define CTASSERT(x) _CTASSERT(x, __LINE__)
#define _CTASSERT(x, y) __CTASSERT(x, y)
#define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1]
#endif

/*
* For better performance, we want to write larger chunks instead of
* individual sectors (the size can only be 512, 1024, 2048 or 4096
* bytes). Assert that MAXPHYS can always hold an integer number of
* sectors by asserting that both are power of two numbers and the
* MAXPHYS is greater than MAXBPS.
*/
CTASSERT(powerof2(MAXPHYS));
CTASSERT(powerof2(MAXBPS));
CTASSERT(MAXPHYS > MAXBPS);

const static ssize_t chunksize = MAXPHYS;

#define mincls(fat) ((fat) == 12 ? MINCLS12 : \		#define mincls(fat) ((fat) == 12 ? MINCLS12 : \
(fat) == 16 ? MINCLS16 : \		(fat) == 16 ? MINCLS16 : \
MINCLS32)		MINCLS32)

#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \		#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \
(fat) == 16 ? MAXCLS16 : \		(fat) == 16 ? MAXCLS16 : \
MAXCLS32)		MAXCLS32)

▲ Show 20 Lines • Show All 127 Lines • ▼ Show 20 Lines	static const u_int8_t bootcode[] = {
0x0d, 0x0a,		0x0d, 0x0a,
0		0
};		};

static volatile sig_atomic_t got_siginfo;		static volatile sig_atomic_t got_siginfo;
static void infohandler(int);		static void infohandler(int);

static int check_mounted(const char *, mode_t);		static int check_mounted(const char *, mode_t);
		static ssize_t getchunksize(void);
static int getstdfmt(const char , struct bpb );		static int getstdfmt(const char , struct bpb );
static int getdiskinfo(int, const char , const char , int, struct bpb *);		static int getdiskinfo(int, const char , const char , int, struct bpb *);
static void print_bpb(struct bpb *);		static void print_bpb(struct bpb *);
static int ckgeom(const char , u_int, const char );		static int ckgeom(const char , u_int, const char );
static void mklabel(u_int8_t , const char );		static void mklabel(u_int8_t , const char );
static int oklabel(const char *);		static int oklabel(const char *);
static void setstr(u_int8_t , const char , size_t);		static void setstr(u_int8_t , const char , size_t);

Show All 16 Lines	mkfs_msdos(const char fname, const char dtype, const struct msdos_options *op)
const char *bname;		const char *bname;
ssize_t n;		ssize_t n;
time_t now;		time_t now;
u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;		u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;
u_int extra_res, alignment, saved_x, attempts=0;		u_int extra_res, alignment, saved_x, attempts=0;
bool set_res, set_spf, set_spc;		bool set_res, set_spf, set_spc;
int fd, fd1, rv;		int fd, fd1, rv;
struct msdos_options o = *op;		struct msdos_options o = *op;
		ssize_t chunksize;

physbuf = NULL;		physbuf = NULL;
rv = -1;		rv = -1;
fd = fd1 = -1;		fd = fd1 = -1;

if (o.block_size && o.sectors_per_cluster) {		if (o.block_size && o.sectors_per_cluster) {
warnx("Cannot specify both block size and sectors per cluster");		warnx("Cannot specify both block size and sectors per cluster");
goto done;		goto done;
▲ Show 20 Lines • Show All 352 Lines • ▼ Show 20 Lines	if (o.timestamp_set) {
tv.tv_usec = 0;		tv.tv_usec = 0;
tm = gmtime(&now);		tm = gmtime(&now);
} else {		} else {
gettimeofday(&tv, NULL);		gettimeofday(&tv, NULL);
now = tv.tv_sec;		now = tv.tv_sec;
tm = localtime(&now);		tm = localtime(&now);
}		}

		chunksize = getchunksize();
physbuf = malloc(chunksize);		physbuf = malloc(chunksize);
if (physbuf == NULL) {		if (physbuf == NULL) {
warn(NULL);		warn(NULL);
goto done;		goto done;
}		}
physbuf_end = physbuf + chunksize;		physbuf_end = physbuf + chunksize;
img = physbuf;		img = physbuf;

▲ Show 20 Lines • Show All 192 Lines • ▼ Show 20 Lines	#if !defined(MAKEFS)
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) \|\|		if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) \|\|
!strcmp(s1, s2)) {		!strcmp(s1, s2)) {
warnx("%s is mounted on %s", fname, mp->f_mntonname);		warnx("%s is mounted on %s", fname, mp->f_mntonname);
return -1;		return -1;
}		}
}		}
#endif		#endif
return 0;		return 0;
		}

		/*
		* Get optimal I/O size
		*/
		static ssize_t
		getchunksize(void)
		{
		static int chunksize;

		if (chunksize != 0)
		return ((ssize_t)chunksize);

		#ifdef KERN_MAXPHYS
		int mib[2];
		size_t len;

		mib[0] = CTL_KERN;
		mib[1] = KERN_MAXPHYS;
		len = sizeof(chunksize);

		if (sysctl(mib, 2, &chunksize, &len, NULL, 0) == -1) {
		warn("sysctl: KERN_MAXPHYS, using %zu", (size_t)MAXPHYS);
		chunksize = 0;
		}
		#endif
		if (chunksize == 0)
		chunksize = MAXPHYS;

		/*
		* For better performance, we want to write larger chunks instead of
		* individual sectors (the size can only be 512, 1024, 2048 or 4096
		* bytes). Assert that chunksize can always hold an integer number of
		* sectors by asserting that both are power of two numbers and the
		* chunksize is greater than MAXBPS.
		*/
		static_assert(powerof2(MAXBPS), "MAXBPS is not power of 2");
		assert(powerof2(chunksize));
		assert(chunksize > MAXBPS);

		return ((ssize_t)chunksize);
}		}

/*		/*
* Get a standard format.		* Get a standard format.
*/		*/
static int		static int
getstdfmt(const char fmt, struct bpb bpb)		getstdfmt(const char fmt, struct bpb bpb)
{		{
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