/**
* Open an emulation device or file.
*/
static int
zbc_fake_open(const char *filename,
int flags,
struct zbc_device **pdev)
{
zbc_fake_device_t *fdev;
int fd, ret;
zbc_debug("%s: ########## Trying FAKE driver ##########\n",
filename);
/* Open emulation device/file */
fd = open(filename, zbc_open_flags(flags));
if ( fd < 0 ) {
zbc_error("%s: open failed %d (%s)\n",
filename,
errno,
strerror(errno));
ret = -errno;
goto out;
}
/* Allocate a handle */
ret = -ENOMEM;
fdev = calloc(1, sizeof(*fdev));
if ( ! fdev ) {
goto out;
}
fdev->dev.zbd_fd = fd;
fdev->zbd_meta_fd = -1;
fdev->dev.zbd_filename = strdup(filename);
if ( ! fdev->dev.zbd_filename ) {
goto out_free_dev;
}
/* Set the fake device information */
ret = zbc_fake_set_info(&fdev->dev);
if ( ret != 0 ) {
goto out_free_filename;
}
/* Open metadata */
ret = zbc_fake_open_metadata(fdev);
if ( ret ) {
goto out_free_filename;
}
*pdev = &fdev->dev;
zbc_debug("%s: ########## FAKE driver succeeded ##########\n",
filename);
return 0;
out_free_filename:
free(fdev->dev.zbd_filename);
out_free_dev:
free(fdev);
out:
if ( fd >= 0 ) {
close(fd);
}
zbc_debug("%s: ########## FAKE driver failed %d ##########\n",
filename,
ret);
return ret;
}
/**
* Open a disk.
*/
static int
zbc_scsi_open(const char *filename,
int flags,
struct zbc_device **pdev)
{
struct zbc_device *dev;
struct stat st;
int fd, ret;
zbc_debug("%s: ########## Trying SCSI driver ##########\n",
filename);
/* Open the device file */
fd = open(filename, zbc_open_flags(flags));
if ( fd < 0 ) {
zbc_error("Open device file %s failed %d (%s)\n",
filename,
errno,
strerror(errno));
ret = -errno;
goto out;
}
/* Check device */
if ( fstat(fd, &st) != 0 ) {
zbc_error("Stat device %s failed %d (%s)\n",
filename,
errno,
strerror(errno));
ret = -errno;
goto out;
}
if ( (! S_ISCHR(st.st_mode))
&& (! S_ISBLK(st.st_mode)) ) {
ret = -ENXIO;
goto out;
}
/* Set device decriptor */
ret = -ENOMEM;
dev = calloc(1, sizeof(struct zbc_device));
if ( ! dev ) {
goto out;
}
dev->zbd_filename = strdup(filename);
if ( ! dev->zbd_filename ) {
goto out_free_dev;
}
dev->zbd_fd = fd;
ret = zbc_scsi_get_info(dev);
if ( ret ) {
goto out_free_filename;
}
*pdev = dev;
zbc_debug("%s: ########## SCSI driver succeeded ##########\n",
filename);
return( 0 );
out_free_filename:
free(dev->zbd_filename);
out_free_dev:
free(dev);
out:
if ( fd >= 0 ) {
close(fd);
}
zbc_debug("%s: ########## SCSI driver failed %d ##########\n",
filename,
ret);
return( ret );
}
