* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <getopt.h>
-#include <inttypes.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <time.h>
-#include <sys/time.h>
-#include <malloc.h>
-#include <termios.h>
-#include <sys/poll.h>
-#include <errno.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-
#include "vl.h"
+#include "block_int.h"
-#define NO_THUNK_TYPE_SIZE
-#include "thunk.h"
+#ifdef _BSD
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/queue.h>
+#include <sys/disk.h>
+#endif
-struct BlockDriverState {
- int fd; /* if -1, only COW mappings */
- int64_t total_sectors;
- int read_only;
+#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
- uint8_t *cow_bitmap; /* if non NULL, COW mappings are used first */
- uint8_t *cow_bitmap_addr; /* mmap address of cow_bitmap */
- int cow_bitmap_size;
- int cow_fd;
- int64_t cow_sectors_offset;
- char filename[1024];
-};
+#ifdef __sun__
+#include <sys/dkio.h>
+#endif
-BlockDriverState *bdrv_open(const char *filename, int snapshot)
-{
- BlockDriverState *bs;
- int fd, cow_fd;
- int64_t size;
- char template[] = "/tmp/vl.XXXXXX";
- struct cow_header_v2 cow_header;
- struct stat st;
+static BlockDriverState *bdrv_first;
+static BlockDriver *first_drv;
- bs = malloc(sizeof(BlockDriverState));
- if(!bs)
- return NULL;
- bs->read_only = 0;
- bs->fd = -1;
- bs->cow_fd = -1;
- bs->cow_bitmap = NULL;
- strcpy(bs->filename, filename);
+#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 );
- /* open standard HD image */
- fd = open(filename, O_RDWR | O_LARGEFILE);
- if (fd < 0) {
- /* read only image on disk */
- fd = open(filename, O_RDONLY | O_LARGEFILE);
- if (fd < 0) {
- perror(filename);
- goto fail;
- }
- if (!snapshot)
- bs->read_only = 1;
- }
- bs->fd = fd;
+kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
+{
+ kern_return_t kernResult;
+ mach_port_t masterPort;
+ CFMutableDictionaryRef classesToMatch;
- /* see if it is a cow image */
- if (read(fd, &cow_header, sizeof(cow_header)) != sizeof(cow_header)) {
- fprintf(stderr, "%s: could not read header\n", filename);
- goto fail;
+ kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
+ if ( KERN_SUCCESS != kernResult ) {
+ printf( "IOMasterPort returned %d\n", kernResult );
}
- if (cow_header.magic == htonl(COW_MAGIC) &&
- cow_header.version == htonl(COW_VERSION)) {
- /* cow image found */
- size = cow_header.size;
-#ifndef WORDS_BIGENDIAN
- size = bswap64(size);
-#endif
- bs->total_sectors = size / 512;
-
- bs->cow_fd = fd;
- bs->fd = -1;
- if (cow_header.backing_file[0] != '\0') {
- if (stat(cow_header.backing_file, &st) != 0) {
- fprintf(stderr, "%s: could not find original disk image '%s'\n", filename, cow_header.backing_file);
- goto fail;
- }
- if (st.st_mtime != htonl(cow_header.mtime)) {
- fprintf(stderr, "%s: original raw disk image '%s' does not match saved timestamp\n", filename, cow_header.backing_file);
- goto fail;
- }
- fd = open(cow_header.backing_file, O_RDONLY | O_LARGEFILE);
- if (fd < 0)
- goto fail;
- bs->fd = fd;
- }
- /* mmap the bitmap */
- bs->cow_bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header);
- bs->cow_bitmap_addr = mmap(get_mmap_addr(bs->cow_bitmap_size),
- bs->cow_bitmap_size,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, bs->cow_fd, 0);
- if (bs->cow_bitmap_addr == MAP_FAILED)
- goto fail;
- bs->cow_bitmap = bs->cow_bitmap_addr + sizeof(cow_header);
- bs->cow_sectors_offset = (bs->cow_bitmap_size + 511) & ~511;
- snapshot = 0;
+
+ classesToMatch = IOServiceMatching( kIOCDMediaClass );
+ if ( classesToMatch == NULL ) {
+ printf( "IOServiceMatching returned a NULL dictionary.\n" );
} else {
- /* standard raw image */
- size = lseek64(fd, 0, SEEK_END);
- bs->total_sectors = size / 512;
- bs->fd = fd;
+ CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
+ }
+ kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
+ if ( KERN_SUCCESS != kernResult )
+ {
+ printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
}
+
+ return kernResult;
+}
- if (snapshot) {
- /* create a temporary COW file */
- cow_fd = mkstemp(template);
- if (cow_fd < 0)
- goto fail;
- bs->cow_fd = cow_fd;
- unlink(template);
-
- /* just need to allocate bitmap */
- bs->cow_bitmap_size = (bs->total_sectors + 7) >> 3;
- bs->cow_bitmap_addr = mmap(get_mmap_addr(bs->cow_bitmap_size),
- bs->cow_bitmap_size,
- PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if (bs->cow_bitmap_addr == MAP_FAILED)
- goto fail;
- bs->cow_bitmap = bs->cow_bitmap_addr;
- bs->cow_sectors_offset = 0;
+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
+
+void bdrv_register(BlockDriver *bdrv)
+{
+ bdrv->next = first_drv;
+ first_drv = bdrv;
+}
+
+/* create a new block device (by default it is empty) */
+BlockDriverState *bdrv_new(const char *device_name)
+{
+ BlockDriverState **pbs, *bs;
+
+ bs = qemu_mallocz(sizeof(BlockDriverState));
+ if(!bs)
+ return NULL;
+ pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
+ if (device_name[0] != '\0') {
+ /* insert at the end */
+ pbs = &bdrv_first;
+ while (*pbs != NULL)
+ pbs = &(*pbs)->next;
+ *pbs = bs;
+ }
return bs;
- fail:
- bdrv_close(bs);
+}
+
+BlockDriver *bdrv_find_format(const char *format_name)
+{
+ BlockDriver *drv1;
+ for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
+ if (!strcmp(drv1->format_name, format_name))
+ return drv1;
+ }
return NULL;
}
-void bdrv_close(BlockDriverState *bs)
+int bdrv_create(BlockDriver *drv,
+ const char *filename, int64_t size_in_sectors,
+ const char *backing_file, int flags)
{
- /* we unmap the mapping so that it is written to the COW file */
- if (bs->cow_bitmap_addr)
- munmap(bs->cow_bitmap_addr, bs->cow_bitmap_size);
- if (bs->cow_fd >= 0)
- close(bs->cow_fd);
- if (bs->fd >= 0)
- close(bs->fd);
- free(bs);
+ if (!drv->bdrv_create)
+ return -ENOTSUP;
+ return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
}
-static inline void set_bit(uint8_t *bitmap, int64_t bitnum)
+#ifdef _WIN32
+void get_tmp_filename(char *filename, int size)
{
- bitmap[bitnum / 8] |= (1 << (bitnum%8));
+ char* p = strrchr(filename, '/');
+
+ if (p == NULL)
+ return;
+
+ /* XXX: find a better function */
+ tmpnam(p);
+ *p = '/';
+}
+#else
+void get_tmp_filename(char *filename, int size)
+{
+ int fd;
+ /* XXX: race condition possible */
+ pstrcpy(filename, size, "/tmp/vl.XXXXXX");
+ fd = mkstemp(filename);
+ close(fd);
}
+#endif
-static inline int is_bit_set(const uint8_t *bitmap, int64_t bitnum)
+/* XXX: force raw format if block or character device ? It would
+ simplify the BSD case */
+static BlockDriver *find_image_format(const char *filename)
{
- return !!(bitmap[bitnum / 8] & (1 << (bitnum%8)));
+ int fd, ret, score, score_max;
+ BlockDriver *drv1, *drv;
+ uint8_t *buf;
+ size_t bufsize = 1024;
+
+ fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
+ if (fd < 0) {
+ buf = NULL;
+ ret = 0;
+ } else {
+#ifdef DIOCGSECTORSIZE
+ {
+ unsigned int sectorsize = 512;
+ if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
+ sectorsize > bufsize)
+ bufsize = sectorsize;
+ }
+#endif
+#ifdef CONFIG_COCOA
+ u_int32_t blockSize = 512;
+ if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
+ bufsize = blockSize;
+ }
+#endif
+ buf = qemu_malloc(bufsize);
+ if (!buf)
+ return NULL;
+ ret = read(fd, buf, bufsize);
+ if (ret < 0) {
+ close(fd);
+ qemu_free(buf);
+ return NULL;
+ }
+ close(fd);
+ }
+
+ drv = NULL;
+ score_max = 0;
+ for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
+ score = drv1->bdrv_probe(buf, ret, filename);
+ if (score > score_max) {
+ score_max = score;
+ drv = drv1;
+ }
+ }
+ qemu_free(buf);
+ return drv;
}
+int bdrv_open(BlockDriverState *bs, const char *filename, int snapshot)
+{
+#ifdef CONFIG_COCOA
+ if ( strncmp( filename, "/dev/cdrom", 10 ) == 0 ) {
+ 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
+ return bdrv_open2(bs, filename, snapshot, NULL);
+}
-/* Return true if first block has been changed (ie. current version is
- * in COW file). Set the number of continuous blocks for which that
- * is true. */
-static int is_changed(uint8_t *bitmap,
- int64_t sector_num, int nb_sectors,
- int *num_same)
+int bdrv_open2(BlockDriverState *bs, const char *filename, int snapshot,
+ BlockDriver *drv)
{
- int changed;
+ int ret;
+ char tmp_filename[1024];
+
+ bs->read_only = 0;
+ bs->is_temporary = 0;
+ bs->encrypted = 0;
- if (!bitmap || nb_sectors == 0) {
- *num_same = nb_sectors;
- return 0;
+ if (snapshot) {
+ BlockDriverState *bs1;
+ int64_t total_size;
+
+ /* if snapshot, we create a temporary backing file and open it
+ instead of opening 'filename' directly */
+
+ /* if there is a backing file, use it */
+ bs1 = bdrv_new("");
+ if (!bs1) {
+ return -1;
+ }
+ if (bdrv_open(bs1, filename, 0) < 0) {
+ bdrv_delete(bs1);
+ return -1;
+ }
+ total_size = bs1->total_sectors;
+ bdrv_delete(bs1);
+
+ get_tmp_filename(tmp_filename, sizeof(tmp_filename));
+ /* XXX: use cow for linux as it is more efficient ? */
+ if (bdrv_create(&bdrv_qcow, tmp_filename,
+ total_size, filename, 0) < 0) {
+ return -1;
+ }
+ filename = tmp_filename;
+ bs->is_temporary = 1;
}
- changed = is_bit_set(bitmap, sector_num);
- for (*num_same = 1; *num_same < nb_sectors; (*num_same)++) {
- if (is_bit_set(bitmap, sector_num + *num_same) != changed)
- break;
+ pstrcpy(bs->filename, sizeof(bs->filename), filename);
+ if (!drv) {
+ drv = find_image_format(filename);
+ if (!drv)
+ return -1;
+ }
+ bs->drv = drv;
+ bs->opaque = qemu_mallocz(drv->instance_size);
+ if (bs->opaque == NULL && drv->instance_size > 0)
+ return -1;
+
+ ret = drv->bdrv_open(bs, filename);
+ if (ret < 0) {
+ qemu_free(bs->opaque);
+ return -1;
+ }
+#ifndef _WIN32
+ if (bs->is_temporary) {
+ unlink(filename);
+ }
+#endif
+ if (bs->backing_file[0] != '\0' && drv->bdrv_is_allocated) {
+ /* if there is a backing file, use it */
+ bs->backing_hd = bdrv_new("");
+ if (!bs->backing_hd) {
+ fail:
+ bdrv_close(bs);
+ return -1;
+ }
+ if (bdrv_open(bs->backing_hd, bs->backing_file, 0) < 0)
+ goto fail;
}
- return changed;
+ bs->inserted = 1;
+
+ /* call the change callback */
+ if (bs->change_cb)
+ bs->change_cb(bs->change_opaque);
+
+ return 0;
+}
+
+void bdrv_close(BlockDriverState *bs)
+{
+ if (bs->inserted) {
+ if (bs->backing_hd)
+ bdrv_delete(bs->backing_hd);
+ bs->drv->bdrv_close(bs);
+ qemu_free(bs->opaque);
+#ifdef _WIN32
+ if (bs->is_temporary) {
+ unlink(bs->filename);
+ }
+#endif
+ bs->opaque = NULL;
+ bs->drv = NULL;
+ bs->inserted = 0;
+
+ /* call the change callback */
+ if (bs->change_cb)
+ bs->change_cb(bs->change_opaque);
+ }
+}
+
+void bdrv_delete(BlockDriverState *bs)
+{
+ /* XXX: remove the driver list */
+ bdrv_close(bs);
+ qemu_free(bs);
}
/* commit COW file into the raw image */
int bdrv_commit(BlockDriverState *bs)
{
int64_t i;
- uint8_t *cow_bitmap;
+ int n, j;
+ unsigned char sector[512];
- if (!bs->cow_bitmap) {
- fprintf(stderr, "Already committed to %s\n", bs->filename);
- return 0;
- }
+ if (!bs->inserted)
+ return -ENOENT;
if (bs->read_only) {
- fprintf(stderr, "Can't commit to %s: read-only\n", bs->filename);
- return -1;
+ return -EACCES;
}
- cow_bitmap = bs->cow_bitmap;
- for (i = 0; i < bs->total_sectors; i++) {
- if (is_bit_set(cow_bitmap, i)) {
- unsigned char sector[512];
- if (bdrv_read(bs, i, sector, 1) != 0) {
- fprintf(stderr, "Error reading sector %lli: aborting commit\n",
- (long long)i);
- return -1;
- }
+ if (!bs->backing_hd) {
+ return -ENOTSUP;
+ }
- /* Make bdrv_write write to real file for a moment. */
- bs->cow_bitmap = NULL;
- if (bdrv_write(bs, i, sector, 1) != 0) {
- fprintf(stderr, "Error writing sector %lli: aborting commit\n",
- (long long)i);
- bs->cow_bitmap = cow_bitmap;
- return -1;
+ for (i = 0; i < bs->total_sectors;) {
+ if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) {
+ for(j = 0; j < n; j++) {
+ if (bdrv_read(bs, i, sector, 1) != 0) {
+ return -EIO;
+ }
+
+ if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) {
+ return -EIO;
+ }
+ i++;
}
- bs->cow_bitmap = cow_bitmap;
- }
+ } else {
+ i += n;
+ }
}
- fprintf(stderr, "Committed snapshot to %s\n", bs->filename);
+
+ if (bs->drv->bdrv_make_empty)
+ return bs->drv->bdrv_make_empty(bs);
+
return 0;
}
int bdrv_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
- int ret, n, fd;
- int64_t offset;
-
- while (nb_sectors > 0) {
- if (is_changed(bs->cow_bitmap, sector_num, nb_sectors, &n)) {
- fd = bs->cow_fd;
- offset = bs->cow_sectors_offset;
- } else {
- fd = bs->fd;
- offset = 0;
- }
+ int ret, n;
+ BlockDriver *drv = bs->drv;
- if (fd < 0) {
- /* no file, just return empty sectors */
- memset(buf, 0, n * 512);
+ if (!bs->inserted)
+ return -1;
+
+ while (nb_sectors > 0) {
+ if (sector_num == 0 && bs->boot_sector_enabled) {
+ memcpy(buf, bs->boot_sector_data, 512);
+ n = 1;
+ } else if (bs->backing_hd) {
+ if (drv->bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) {
+ ret = drv->bdrv_read(bs, sector_num, buf, n);
+ if (ret < 0)
+ return -1;
+ } else {
+ /* read from the base image */
+ ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
+ if (ret < 0)
+ return -1;
+ }
} else {
- offset += sector_num * 512;
- lseek64(fd, offset, SEEK_SET);
- ret = read(fd, buf, n * 512);
- if (ret != n * 512) {
+ ret = drv->bdrv_read(bs, sector_num, buf, nb_sectors);
+ if (ret < 0)
return -1;
- }
+ /* no need to loop */
+ break;
}
nb_sectors -= n;
sector_num += n;
int bdrv_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
- int ret, fd, i;
- int64_t offset, retl;
-
+ if (!bs->inserted)
+ return -1;
if (bs->read_only)
return -1;
+ if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
+ memcpy(bs->boot_sector_data, buf, 512);
+ }
+ return bs->drv->bdrv_write(bs, sector_num, buf, nb_sectors);
+}
- if (bs->cow_bitmap) {
- fd = bs->cow_fd;
- offset = bs->cow_sectors_offset;
- } else {
- fd = bs->fd;
- offset = 0;
+void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
+{
+ *nb_sectors_ptr = bs->total_sectors;
+}
+
+/* force a given boot sector. */
+void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size)
+{
+ bs->boot_sector_enabled = 1;
+ if (size > 512)
+ size = 512;
+ memcpy(bs->boot_sector_data, data, size);
+ memset(bs->boot_sector_data + size, 0, 512 - size);
+}
+
+void bdrv_set_geometry_hint(BlockDriverState *bs,
+ int cyls, int heads, int secs)
+{
+ bs->cyls = cyls;
+ bs->heads = heads;
+ bs->secs = secs;
+}
+
+void bdrv_set_type_hint(BlockDriverState *bs, int type)
+{
+ bs->type = type;
+ bs->removable = ((type == BDRV_TYPE_CDROM ||
+ type == BDRV_TYPE_FLOPPY));
+}
+
+void bdrv_set_translation_hint(BlockDriverState *bs, int translation)
+{
+ bs->translation = translation;
+}
+
+void bdrv_get_geometry_hint(BlockDriverState *bs,
+ int *pcyls, int *pheads, int *psecs)
+{
+ *pcyls = bs->cyls;
+ *pheads = bs->heads;
+ *psecs = bs->secs;
+}
+
+int bdrv_get_type_hint(BlockDriverState *bs)
+{
+ return bs->type;
+}
+
+int bdrv_get_translation_hint(BlockDriverState *bs)
+{
+ return bs->translation;
+}
+
+int bdrv_is_removable(BlockDriverState *bs)
+{
+ return bs->removable;
+}
+
+int bdrv_is_read_only(BlockDriverState *bs)
+{
+ return bs->read_only;
+}
+
+int bdrv_is_inserted(BlockDriverState *bs)
+{
+ return bs->inserted;
+}
+
+int bdrv_is_locked(BlockDriverState *bs)
+{
+ return bs->locked;
+}
+
+void bdrv_set_locked(BlockDriverState *bs, int locked)
+{
+ bs->locked = locked;
+}
+
+void bdrv_set_change_cb(BlockDriverState *bs,
+ void (*change_cb)(void *opaque), void *opaque)
+{
+ bs->change_cb = change_cb;
+ bs->change_opaque = opaque;
+}
+
+int bdrv_is_encrypted(BlockDriverState *bs)
+{
+ if (bs->backing_hd && bs->backing_hd->encrypted)
+ return 1;
+ return bs->encrypted;
+}
+
+int bdrv_set_key(BlockDriverState *bs, const char *key)
+{
+ int ret;
+ if (bs->backing_hd && bs->backing_hd->encrypted) {
+ ret = bdrv_set_key(bs->backing_hd, key);
+ if (ret < 0)
+ return ret;
+ if (!bs->encrypted)
+ return 0;
}
-
- offset += sector_num * 512;
- retl = lseek64(fd, offset, SEEK_SET);
- if (retl == -1) {
+ if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
return -1;
+ return bs->drv->bdrv_set_key(bs, key);
+}
+
+void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size)
+{
+ if (!bs->inserted || !bs->drv) {
+ buf[0] = '\0';
+ } else {
+ pstrcpy(buf, buf_size, bs->drv->format_name);
}
- ret = write(fd, buf, nb_sectors * 512);
- if (ret != nb_sectors * 512) {
- return -1;
+}
+
+void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
+ void *opaque)
+{
+ BlockDriver *drv;
+
+ for (drv = first_drv; drv != NULL; drv = drv->next) {
+ it(opaque, drv->format_name);
}
+}
- if (bs->cow_bitmap) {
- for (i = 0; i < nb_sectors; i++)
- set_bit(bs->cow_bitmap, sector_num + i);
+BlockDriverState *bdrv_find(const char *name)
+{
+ BlockDriverState *bs;
+
+ for (bs = bdrv_first; bs != NULL; bs = bs->next) {
+ if (!strcmp(name, bs->device_name))
+ return bs;
+ }
+ return NULL;
+}
+
+void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque)
+{
+ BlockDriverState *bs;
+
+ for (bs = bdrv_first; bs != NULL; bs = bs->next) {
+ it(opaque, bs->device_name);
+ }
+}
+
+const char *bdrv_get_device_name(BlockDriverState *bs)
+{
+ return bs->device_name;
+}
+
+void bdrv_info(void)
+{
+ BlockDriverState *bs;
+
+ for (bs = bdrv_first; bs != NULL; bs = bs->next) {
+ term_printf("%s:", bs->device_name);
+ term_printf(" type=");
+ switch(bs->type) {
+ case BDRV_TYPE_HD:
+ term_printf("hd");
+ break;
+ case BDRV_TYPE_CDROM:
+ term_printf("cdrom");
+ break;
+ case BDRV_TYPE_FLOPPY:
+ term_printf("floppy");
+ break;
+ }
+ term_printf(" removable=%d", bs->removable);
+ if (bs->removable) {
+ term_printf(" locked=%d", bs->locked);
+ }
+ if (bs->inserted) {
+ term_printf(" file=%s", bs->filename);
+ if (bs->backing_file[0] != '\0')
+ term_printf(" backing_file=%s", bs->backing_file);
+ term_printf(" ro=%d", bs->read_only);
+ term_printf(" drv=%s", bs->drv->format_name);
+ if (bs->encrypted)
+ term_printf(" encrypted");
+ } else {
+ term_printf(" [not inserted]");
+ }
+ term_printf("\n");
}
+}
+
+/**************************************************************/
+/* RAW block driver */
+
+typedef struct BDRVRawState {
+ int fd;
+} BDRVRawState;
+
+static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
+{
+ return 1; /* maybe */
+}
+
+static int raw_open(BlockDriverState *bs, const char *filename)
+{
+ BDRVRawState *s = bs->opaque;
+ int fd;
+ int64_t size;
+#ifdef _BSD
+ struct stat sb;
+#endif
+#ifdef __sun__
+ struct dk_minfo minfo;
+ int rv;
+#endif
+
+ fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
+ if (fd < 0) {
+ fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
+ if (fd < 0)
+ return -1;
+ bs->read_only = 1;
+ }
+#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);
+ }
+#ifdef _WIN32
+ /* On Windows hosts it can happen that we're unable to get file size
+ for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
+ if (size == -1)
+ size = LONG_LONG_MAX;
+#endif
+ bs->total_sectors = size / 512;
+ s->fd = fd;
return 0;
}
-void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
+static int raw_read(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
{
- *nb_sectors_ptr = bs->total_sectors;
+ BDRVRawState *s = bs->opaque;
+ int ret;
+
+ lseek(s->fd, sector_num * 512, SEEK_SET);
+ ret = read(s->fd, buf, nb_sectors * 512);
+ if (ret != nb_sectors * 512)
+ return -1;
+ return 0;
+}
+
+static int raw_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
+{
+ BDRVRawState *s = bs->opaque;
+ int ret;
+
+ lseek(s->fd, sector_num * 512, SEEK_SET);
+ ret = write(s->fd, buf, nb_sectors * 512);
+ if (ret != nb_sectors * 512)
+ return -1;
+ return 0;
+}
+
+static void raw_close(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ close(s->fd);
+}
+
+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 | O_LARGEFILE,
+ 0644);
+ if (fd < 0)
+ return -EIO;
+ ftruncate(fd, total_size * 512);
+ close(fd);
+ return 0;
+}
+
+BlockDriver bdrv_raw = {
+ "raw",
+ sizeof(BDRVRawState),
+ raw_probe,
+ raw_open,
+ raw_read,
+ raw_write,
+ raw_close,
+ raw_create,
+};
+
+void bdrv_init(void)
+{
+ bdrv_register(&bdrv_raw);
+#ifndef _WIN32
+ bdrv_register(&bdrv_cow);
+#endif
+ bdrv_register(&bdrv_qcow);
+ bdrv_register(&bdrv_vmdk);
+ bdrv_register(&bdrv_cloop);
+ bdrv_register(&bdrv_dmg);
+ bdrv_register(&bdrv_bochs);
+ bdrv_register(&bdrv_vpc);
+ bdrv_register(&bdrv_vvfat);
}
projects / qemu / blobdiff