}
#endif
+#ifdef _WIN32
+static int is_windows_drive(const char *filename)
+{
+ if (((filename[0] >= 'a' && filename[0] <= 'z') ||
+ (filename[0] >= 'A' && filename[0] <= 'Z')) &&
+ filename[1] == ':' && filename[2] == '\0')
+ return 1;
+ if (strstart(filename, "\\\\.\\", NULL) ||
+ strstart(filename, "//./", NULL))
+ return 1;
+ return 0;
+}
+#endif
+
static BlockDriver *find_protocol(const char *filename)
{
BlockDriver *drv1;
char protocol[128];
int len;
const char *p;
+
+#ifdef _WIN32
+ if (is_windows_drive(filename))
+ return &bdrv_raw;
+#endif
p = strchr(filename, ':');
if (!p)
return &bdrv_raw;
len = p - filename;
if (len > sizeof(protocol) - 1)
len = sizeof(protocol) - 1;
-#ifdef _WIN32
- if (len == 1) {
- /* specific win32 case for driver letters */
- return &bdrv_raw;
- }
-#endif
memcpy(protocol, filename, len);
protocol[len] = '\0';
for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
uint8_t buf[2048];
BlockDriverState *bs;
+ /* detect host devices. By convention, /dev/cdrom[N] is always
+ recognized as a host CDROM */
+ if (strstart(filename, "/dev/cdrom", NULL))
+ return &bdrv_host_device;
+#ifdef _WIN32
+ if (is_windows_drive(filename))
+ return &bdrv_host_device;
+#else
+ {
+ struct stat st;
+ if (stat(filename, &st) >= 0 &&
+ (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
+ return &bdrv_host_device;
+ }
+ }
+#endif
+
drv = find_protocol(filename);
- /* no need to test disk image formats for vvfat or host specific
- devices */
+ /* no need to test disk image formats for vvfat */
if (drv == &bdrv_vvfat)
return drv;
- if (strstart(filename, "/dev/", NULL))
- return &bdrv_raw;
-
+
ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY);
if (ret < 0)
return NULL;
goto fail;
}
- bs->inserted = 1;
-
/* call the change callback */
+ bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
void bdrv_close(BlockDriverState *bs)
{
- if (bs->inserted) {
+ if (bs->drv) {
if (bs->backing_hd)
bdrv_delete(bs->backing_hd);
bs->drv->bdrv_close(bs);
#endif
bs->opaque = NULL;
bs->drv = NULL;
- bs->inserted = 0;
/* call the change callback */
+ bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
}
/* commit COW file into the raw image */
int bdrv_commit(BlockDriverState *bs)
{
+ BlockDriver *drv = bs->drv;
int64_t i, total_sectors;
int n, j;
unsigned char sector[512];
- if (!bs->inserted)
- return -ENOENT;
+ if (!drv)
+ return -ENOMEDIUM;
if (bs->read_only) {
return -EACCES;
total_sectors = bdrv_getlength(bs) >> SECTOR_BITS;
for (i = 0; i < total_sectors;) {
- if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) {
+ if (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 (bs->drv->bdrv_make_empty)
- return bs->drv->bdrv_make_empty(bs);
+ if (drv->bdrv_make_empty)
+ return drv->bdrv_make_empty(bs);
return 0;
}
-/* return < 0 if error */
+/* return < 0 if error. See bdrv_write() for the return codes */
int bdrv_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
BlockDriver *drv = bs->drv;
- if (!bs->inserted)
- return -1;
+ if (!drv)
+ return -ENOMEDIUM;
if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
memcpy(buf, bs->boot_sector_data, 512);
if (ret < 0)
return ret;
else if (ret != len)
- return -EIO;
+ return -EINVAL;
else
return 0;
} else {
}
}
-/* return < 0 if error */
+/* Return < 0 if error. Important errors are:
+ -EIO generic I/O error (may happen for all errors)
+ -ENOMEDIUM No media inserted.
+ -EINVAL Invalid sector number or nb_sectors
+ -EACCES Trying to write a read-only device
+*/
int bdrv_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
BlockDriver *drv = bs->drv;
- if (!bs->inserted)
- return -1;
+ if (!bs->drv)
+ return -ENOMEDIUM;
if (bs->read_only)
- return -1;
+ return -EACCES;
if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
memcpy(bs->boot_sector_data, buf, 512);
}
}
}
-/* not necessary now */
static int bdrv_pread_em(BlockDriverState *bs, int64_t offset,
uint8_t *buf, int count1)
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_pread)
return bdrv_pread_em(bs, offset, buf1, count1);
return drv->bdrv_pread(bs, offset, buf1, count1);
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_pwrite)
return bdrv_pwrite_em(bs, offset, buf1, count1);
return drv->bdrv_pwrite(bs, offset, buf1, count1);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_truncate)
return -ENOTSUP;
return drv->bdrv_truncate(bs, offset);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_getlength) {
/* legacy mode */
return bs->total_sectors * SECTOR_SIZE;
return drv->bdrv_getlength(bs);
}
+/* return 0 as number of sectors if no device present or error */
void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
{
- *nb_sectors_ptr = bs->total_sectors;
+ int64_t length;
+ length = bdrv_getlength(bs);
+ if (length < 0)
+ length = 0;
+ else
+ length = length >> SECTOR_BITS;
+ *nb_sectors_ptr = length;
}
/* force a given boot sector. */
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;
-}
-
+/* XXX: no longer used */
void bdrv_set_change_cb(BlockDriverState *bs,
void (*change_cb)(void *opaque), void *opaque)
{
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size)
{
- if (!bs->inserted || !bs->drv) {
+ if (!bs->drv) {
buf[0] = '\0';
} else {
pstrcpy(buf, buf_size, bs->drv->format_name);
if (bs->removable) {
term_printf(" locked=%d", bs->locked);
}
- if (bs->inserted) {
+ if (bs->drv) {
term_printf(" file=%s", bs->filename);
if (bs->backing_file[0] != '\0')
term_printf(" backing_file=%s", bs->backing_file);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_write_compressed)
return -ENOTSUP;
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_get_info)
return -ENOTSUP;
memset(bdi, 0, sizeof(*bdi));
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_snapshot_create)
return -ENOTSUP;
return drv->bdrv_snapshot_create(bs, sn_info);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_snapshot_goto)
return -ENOTSUP;
return drv->bdrv_snapshot_goto(bs, snapshot_id);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_snapshot_delete)
return -ENOTSUP;
return drv->bdrv_snapshot_delete(bs, snapshot_id);
{
BlockDriver *drv = bs->drv;
if (!drv)
- return -ENOENT;
+ return -ENOMEDIUM;
if (!drv->bdrv_snapshot_list)
return -ENOTSUP;
return drv->bdrv_snapshot_list(bs, psn_info);
{
BlockDriver *drv = bs->drv;
- if (!bs->inserted)
+ if (!drv)
return NULL;
/* XXX: we assume that nb_sectors == 0 is suppored by the async read */
{
BlockDriver *drv = bs->drv;
- if (!bs->inserted)
+ if (!drv)
return NULL;
if (bs->read_only)
return NULL;
void bdrv_init(void)
{
bdrv_register(&bdrv_raw);
+ bdrv_register(&bdrv_host_device);
#ifndef _WIN32
bdrv_register(&bdrv_cow);
#endif
acb->next = drv->free_aiocb;
drv->free_aiocb = acb;
}
+
+/**************************************************************/
+/* removable device support */
+
+/**
+ * Return TRUE if the media is present
+ */
+int bdrv_is_inserted(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ int ret;
+ if (!drv)
+ return 0;
+ if (!drv->bdrv_is_inserted)
+ return 1;
+ ret = drv->bdrv_is_inserted(bs);
+ return ret;
+}
+
+/**
+ * Return TRUE if the media changed since the last call to this
+ * function. It is currently only used for floppy disks
+ */
+int bdrv_media_changed(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ int ret;
+
+ if (!drv || !drv->bdrv_media_changed)
+ ret = -ENOTSUP;
+ else
+ ret = drv->bdrv_media_changed(bs);
+ if (ret == -ENOTSUP)
+ ret = bs->media_changed;
+ bs->media_changed = 0;
+ return ret;
+}
+
+/**
+ * If eject_flag is TRUE, eject the media. Otherwise, close the tray
+ */
+void bdrv_eject(BlockDriverState *bs, int eject_flag)
+{
+ BlockDriver *drv = bs->drv;
+ int ret;
+
+ if (!drv || !drv->bdrv_eject) {
+ ret = -ENOTSUP;
+ } else {
+ ret = drv->bdrv_eject(bs, eject_flag);
+ }
+ if (ret == -ENOTSUP) {
+ if (eject_flag)
+ bdrv_close(bs);
+ }
+}
+
+int bdrv_is_locked(BlockDriverState *bs)
+{
+ return bs->locked;
+}
+
+/**
+ * Lock or unlock the media (if it is locked, the user won't be able
+ * to eject it manually).
+ */
+void bdrv_set_locked(BlockDriverState *bs, int locked)
+{
+ BlockDriver *drv = bs->drv;
+
+ bs->locked = locked;
+ if (drv && drv->bdrv_set_locked) {
+ drv->bdrv_set_locked(bs, locked);
+ }
+}
projects / qemu / blobdiff