x49gp/block-raw.c
2018-08-28 12:46:52 -04:00

888 lines
22 KiB
C

/*
* Block driver for RAW files
*
* Copyright (c) 2006 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "block.h"
#include "block_int.h"
#include <assert.h>
#ifndef _WIN32
#ifdef X49GP
#define QEMU_TOOL
#endif
#ifdef CONFIG_COCOA
#include <paths.h>
#include <sys/param.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/IOBSD.h>
#include <IOKit/storage/IOMediaBSDClient.h>
#include <IOKit/storage/IOMedia.h>
#include <IOKit/storage/IOCDMedia.h>
//#include <IOKit/storage/IOCDTypes.h>
#include <CoreFoundation/CoreFoundation.h>
#endif
#ifdef __sun__
#define _POSIX_PTHREAD_SEMANTICS 1
#include <signal.h>
#include <sys/dkio.h>
#endif
#ifdef __linux__
#include <sys/ioctl.h>
#include <linux/cdrom.h>
#include <linux/fd.h>
#endif
#ifdef __FreeBSD__
#include <sys/disk.h>
#endif
//#define DEBUG_FLOPPY
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_FD 2
/* if the FD is not accessed during that time (in ms), we try to
reopen it to see if the disk has been changed */
#define FD_OPEN_TIMEOUT 1000
typedef struct BDRVRawState {
int fd;
int type;
#if defined(__linux__)
/* linux floppy specific */
int fd_open_flags;
int64_t fd_open_time;
int64_t fd_error_time;
int fd_got_error;
int fd_media_changed;
#endif
} BDRVRawState;
static int fd_open(BlockDriverState *bs);
static int raw_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int fd, open_flags, ret;
open_flags = O_BINARY;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
open_flags |= O_RDWR;
} else {
open_flags |= O_RDONLY;
bs->read_only = 1;
}
if (flags & BDRV_O_CREAT)
open_flags |= O_CREAT | O_TRUNC;
s->type = FTYPE_FILE;
fd = open(filename, open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
return 0;
}
/* XXX: use host sector size if necessary with:
#ifdef DIOCGSECTORSIZE
{
unsigned int sectorsize = 512;
if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
sectorsize > bufsize)
bufsize = sectorsize;
}
#endif
#ifdef CONFIG_COCOA
u_int32_t blockSize = 512;
if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
bufsize = blockSize;
}
#endif
*/
static int raw_pread(BlockDriverState *bs, int64_t offset,
uint8_t *buf, int count)
{
BDRVRawState *s = bs->opaque;
int ret;
ret = fd_open(bs);
if (ret < 0)
return ret;
lseek(s->fd, offset, SEEK_SET);
ret = read(s->fd, buf, count);
return ret;
}
static int raw_pwrite(BlockDriverState *bs, int64_t offset,
const uint8_t *buf, int count)
{
BDRVRawState *s = bs->opaque;
int ret;
ret = fd_open(bs);
if (ret < 0)
return ret;
lseek(s->fd, offset, SEEK_SET);
ret = write(s->fd, buf, count);
return ret;
}
static void raw_close(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
if (s->fd >= 0) {
close(s->fd);
s->fd = -1;
}
}
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
BDRVRawState *s = bs->opaque;
if (s->type != FTYPE_FILE)
return -ENOTSUP;
if (ftruncate(s->fd, offset) < 0)
return -errno;
return 0;
}
static int64_t raw_getlength(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int fd = s->fd;
int64_t size;
#ifdef _BSD
struct stat sb;
#endif
#ifdef __sun__
struct dk_minfo minfo;
int rv;
#endif
int ret;
ret = fd_open(bs);
if (ret < 0)
return ret;
#ifdef _BSD
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
#ifdef DIOCGMEDIASIZE
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
#endif
#ifdef CONFIG_COCOA
size = LONG_LONG_MAX;
#else
size = lseek(fd, 0LL, SEEK_END);
#endif
} else
#endif
#ifdef __sun__
/*
* use the DKIOCGMEDIAINFO ioctl to read the size.
*/
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
if ( rv != -1 ) {
size = minfo.dki_lbsize * minfo.dki_capacity;
} else /* there are reports that lseek on some devices
fails, but irc discussion said that contingency
on contingency was overkill */
#endif
{
size = lseek(fd, 0, SEEK_END);
}
return size;
}
static int raw_create(const char *filename, int64_t total_size,
const char *backing_file, int flags)
{
int fd;
int result = 0;
if (flags || backing_file)
return -ENOTSUP;
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
0644);
if (fd < 0) {
result=-errno;
} else {
if (ftruncate(fd, total_size * 512)) {
result=-errno;
}
if (close(fd) != 0) {
result=-errno;
}
}
return result;
}
static void raw_flush(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
fsync(s->fd);
}
BlockDriver bdrv_raw = {
"raw",
sizeof(BDRVRawState),
NULL, /* no probe for protocols */
raw_open,
NULL,
NULL,
raw_close,
raw_create,
raw_flush,
.protocol_name = "file",
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
};
/***********************************************/
/* host device */
#ifdef CONFIG_COCOA
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
{
kern_return_t kernResult;
mach_port_t masterPort;
CFMutableDictionaryRef classesToMatch;
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
if ( KERN_SUCCESS != kernResult ) {
printf( "IOMasterPort returned %d\n", kernResult );
}
classesToMatch = IOServiceMatching( kIOCDMediaClass );
if ( classesToMatch == NULL ) {
printf( "IOServiceMatching returned a NULL dictionary.\n" );
} else {
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
}
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
if ( KERN_SUCCESS != kernResult )
{
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
}
return kernResult;
}
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
{
io_object_t nextMedia;
kern_return_t kernResult = KERN_FAILURE;
*bsdPath = '\0';
nextMedia = IOIteratorNext( mediaIterator );
if ( nextMedia )
{
CFTypeRef bsdPathAsCFString;
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
if ( bsdPathAsCFString ) {
size_t devPathLength;
strcpy( bsdPath, _PATH_DEV );
strcat( bsdPath, "r" );
devPathLength = strlen( bsdPath );
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
kernResult = KERN_SUCCESS;
}
CFRelease( bsdPathAsCFString );
}
IOObjectRelease( nextMedia );
}
return kernResult;
}
#endif
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int fd, open_flags, ret;
#ifdef CONFIG_COCOA
if (strstart(filename, "/dev/cdrom", NULL)) {
kern_return_t kernResult;
io_iterator_t mediaIterator;
char bsdPath[ MAXPATHLEN ];
int fd;
kernResult = FindEjectableCDMedia( &mediaIterator );
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
if ( bsdPath[ 0 ] != '\0' ) {
strcat(bsdPath,"s0");
/* some CDs don't have a partition 0 */
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
if (fd < 0) {
bsdPath[strlen(bsdPath)-1] = '1';
} else {
close(fd);
}
filename = bsdPath;
}
if ( mediaIterator )
IOObjectRelease( mediaIterator );
}
#endif
open_flags = O_BINARY;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
open_flags |= O_RDWR;
} else {
open_flags |= O_RDONLY;
bs->read_only = 1;
}
s->type = FTYPE_FILE;
#if defined(__linux__)
if (strstart(filename, "/dev/cd", NULL)) {
/* open will not fail even if no CD is inserted */
open_flags |= O_NONBLOCK;
s->type = FTYPE_CD;
} else if (strstart(filename, "/dev/fd", NULL)) {
s->type = FTYPE_FD;
s->fd_open_flags = open_flags;
/* open will not fail even if no floppy is inserted */
open_flags |= O_NONBLOCK;
}
#endif
fd = open(filename, open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
#if defined(__linux__)
/* close fd so that we can reopen it as needed */
if (s->type == FTYPE_FD) {
close(s->fd);
s->fd = -1;
s->fd_media_changed = 1;
}
#endif
return 0;
}
static int fd_open(BlockDriverState *bs)
{
return 0;
}
#if defined(__linux__)
static int raw_is_inserted(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int ret;
switch(s->type) {
case FTYPE_CD:
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
if (ret == CDS_DISC_OK)
return 1;
else
return 0;
break;
case FTYPE_FD:
ret = fd_open(bs);
return (ret >= 0);
default:
return 1;
}
}
/* currently only used by fdc.c, but a CD version would be good too */
static int raw_media_changed(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
switch(s->type) {
case FTYPE_FD:
{
int ret;
/* XXX: we do not have a true media changed indication. It
does not work if the floppy is changed without trying
to read it */
fd_open(bs);
ret = s->fd_media_changed;
s->fd_media_changed = 0;
#ifdef DEBUG_FLOPPY
printf("Floppy changed=%d\n", ret);
#endif
return ret;
}
default:
return -ENOTSUP;
}
}
static int raw_eject(BlockDriverState *bs, int eject_flag)
{
BDRVRawState *s = bs->opaque;
switch(s->type) {
case FTYPE_CD:
if (eject_flag) {
if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
perror("CDROMEJECT");
} else {
if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
perror("CDROMEJECT");
}
break;
case FTYPE_FD:
{
int fd;
if (s->fd >= 0) {
close(s->fd);
s->fd = -1;
}
fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
if (fd >= 0) {
if (ioctl(fd, FDEJECT, 0) < 0)
perror("FDEJECT");
close(fd);
}
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static int raw_set_locked(BlockDriverState *bs, int locked)
{
BDRVRawState *s = bs->opaque;
switch(s->type) {
case FTYPE_CD:
if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
/* Note: an error can happen if the distribution automatically
mounts the CD-ROM */
// perror("CDROM_LOCKDOOR");
}
break;
default:
return -ENOTSUP;
}
return 0;
}
#else
static int raw_is_inserted(BlockDriverState *bs)
{
return 1;
}
static int raw_media_changed(BlockDriverState *bs)
{
return -ENOTSUP;
}
static int raw_eject(BlockDriverState *bs, int eject_flag)
{
return -ENOTSUP;
}
static int raw_set_locked(BlockDriverState *bs, int locked)
{
return -ENOTSUP;
}
#endif /* !linux */
BlockDriver bdrv_host_device = {
"host_device",
sizeof(BDRVRawState),
NULL, /* no probe for protocols */
hdev_open,
NULL,
NULL,
raw_close,
NULL,
raw_flush,
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
.bdrv_getlength = raw_getlength,
/* removable device support */
.bdrv_is_inserted = raw_is_inserted,
.bdrv_media_changed = raw_media_changed,
.bdrv_eject = raw_eject,
.bdrv_set_locked = raw_set_locked,
};
#else /* _WIN32 */
/* XXX: use another file ? */
#include <winioctl.h>
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_HARDDISK 2
typedef struct BDRVRawState {
HANDLE hfile;
int type;
char drive_path[16]; /* format: "d:\" */
} BDRVRawState;
int qemu_ftruncate64(int fd, int64_t length)
{
LARGE_INTEGER li;
LONG high;
HANDLE h;
BOOL res;
if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
return -1;
h = (HANDLE)_get_osfhandle(fd);
/* get current position, ftruncate do not change position */
li.HighPart = 0;
li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
return -1;
high = length >> 32;
if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
return -1;
res = SetEndOfFile(h);
/* back to old position */
SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
return res ? 0 : -1;
}
static int set_sparse(int fd)
{
DWORD returned;
return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
NULL, 0, NULL, 0, &returned, NULL);
}
static int raw_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int access_flags, create_flags;
DWORD overlapped;
s->type = FTYPE_FILE;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
access_flags = GENERIC_READ | GENERIC_WRITE;
} else {
access_flags = GENERIC_READ;
}
if (flags & BDRV_O_CREAT) {
create_flags = CREATE_ALWAYS;
} else {
create_flags = OPEN_EXISTING;
}
#ifdef QEMU_TOOL
overlapped = FILE_ATTRIBUTE_NORMAL;
#else
overlapped = FILE_FLAG_OVERLAPPED;
#endif
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();
if (err == ERROR_ACCESS_DENIED)
return -EACCES;
return -1;
}
return 0;
}
static int raw_pread(BlockDriverState *bs, int64_t offset,
uint8_t *buf, int count)
{
BDRVRawState *s = bs->opaque;
OVERLAPPED ov;
DWORD ret_count;
int ret;
memset(&ov, 0, sizeof(ov));
ov.Offset = offset;
ov.OffsetHigh = offset >> 32;
ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
if (!ret) {
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
if (!ret)
return -EIO;
else
return ret_count;
}
return ret_count;
}
static int raw_pwrite(BlockDriverState *bs, int64_t offset,
const uint8_t *buf, int count)
{
BDRVRawState *s = bs->opaque;
OVERLAPPED ov;
DWORD ret_count;
int ret;
memset(&ov, 0, sizeof(ov));
ov.Offset = offset;
ov.OffsetHigh = offset >> 32;
ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
if (!ret) {
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
if (!ret)
return -EIO;
else
return ret_count;
}
return ret_count;
}
static void raw_flush(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
FlushFileBuffers(s->hfile);
}
static void raw_close(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
CloseHandle(s->hfile);
}
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
BDRVRawState *s = bs->opaque;
DWORD low, high;
low = offset;
high = offset >> 32;
if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
return -EIO;
if (!SetEndOfFile(s->hfile))
return -EIO;
return 0;
}
static int64_t raw_getlength(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
LARGE_INTEGER l;
ULARGE_INTEGER available, total, total_free;
DISK_GEOMETRY dg;
DWORD count;
BOOL status;
switch(s->type) {
case FTYPE_FILE:
l.LowPart = GetFileSize(s->hfile, &l.HighPart);
if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
return -EIO;
break;
case FTYPE_CD:
if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
return -EIO;
l.QuadPart = total.QuadPart;
break;
case FTYPE_HARDDISK:
status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL, 0, &dg, sizeof(dg), &count, NULL);
if (status != FALSE) {
l.QuadPart = dg.Cylinders.QuadPart * dg.TracksPerCylinder
* dg.SectorsPerTrack * dg.BytesPerSector;
}
break;
default:
return -EIO;
}
return l.QuadPart;
}
static int raw_create(const char *filename, int64_t total_size,
const char *backing_file, int flags)
{
int fd;
if (flags || backing_file)
return -ENOTSUP;
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
0644);
if (fd < 0)
return -EIO;
set_sparse(fd);
ftruncate(fd, total_size * 512);
close(fd);
return 0;
}
BlockDriver bdrv_raw = {
"raw",
sizeof(BDRVRawState),
NULL, /* no probe for protocols */
raw_open,
NULL,
NULL,
raw_close,
raw_create,
raw_flush,
.protocol_name = "file",
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
};
/***********************************************/
/* host device */
static int find_cdrom(char *cdrom_name, int cdrom_name_size)
{
char drives[256], *pdrv = drives;
UINT type;
memset(drives, 0, sizeof(drives));
GetLogicalDriveStrings(sizeof(drives), drives);
while(pdrv[0] != '\0') {
type = GetDriveType(pdrv);
switch(type) {
case DRIVE_CDROM:
snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
return 0;
break;
}
pdrv += lstrlen(pdrv) + 1;
}
return -1;
}
static int find_device_type(BlockDriverState *bs, const char *filename)
{
BDRVRawState *s = bs->opaque;
UINT type;
const char *p;
if (strstart(filename, "\\\\.\\", &p) ||
strstart(filename, "//./", &p)) {
if (stristart(p, "PhysicalDrive", NULL))
return FTYPE_HARDDISK;
snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
type = GetDriveType(s->drive_path);
if (type == DRIVE_CDROM)
return FTYPE_CD;
else
return FTYPE_FILE;
} else {
return FTYPE_FILE;
}
}
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int access_flags, create_flags;
DWORD overlapped;
char device_name[64];
if (strstart(filename, "/dev/cdrom", NULL)) {
if (find_cdrom(device_name, sizeof(device_name)) < 0)
return -ENOENT;
filename = device_name;
} else {
/* transform drive letters into device name */
if (((filename[0] >= 'a' && filename[0] <= 'z') ||
(filename[0] >= 'A' && filename[0] <= 'Z')) &&
filename[1] == ':' && filename[2] == '\0') {
snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
filename = device_name;
}
}
s->type = find_device_type(bs, filename);
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
access_flags = GENERIC_READ | GENERIC_WRITE;
} else {
access_flags = GENERIC_READ;
}
create_flags = OPEN_EXISTING;
#ifdef QEMU_TOOL
overlapped = FILE_ATTRIBUTE_NORMAL;
#else
overlapped = FILE_FLAG_OVERLAPPED;
#endif
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();
if (err == ERROR_ACCESS_DENIED)
return -EACCES;
return -1;
}
return 0;
}
BlockDriver bdrv_host_device = {
"host_device",
sizeof(BDRVRawState),
NULL, /* no probe for protocols */
hdev_open,
NULL,
NULL,
raw_close,
NULL,
raw_flush,
.bdrv_pread = raw_pread,
.bdrv_pwrite = raw_pwrite,
.bdrv_getlength = raw_getlength,
};
#endif /* _WIN32 */