static int bs_paio_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
*fd = backed_file_open(path, O_RDWR|O_LARGEFILE|O_DIRECT, size);
/* If we get access denied, try opening the file in readonly mode */
if (*fd == -1 && (errno == EACCES || errno == EROFS)) {
*fd = backed_file_open(path, O_RDONLY|O_LARGEFILE|O_DIRECT,
size);
lu->attrs.readonly = 1;
}
if (*fd < 0)
return *fd;
return 0;
}
static int bs_rdwr_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
uint32_t blksize = 0;
*fd = backed_file_open(path, O_RDWR|O_LARGEFILE|lu->bsoflags, size,
&blksize);
/* If we get access denied, try opening the file in readonly mode */
if (*fd == -1 && (errno == EACCES || errno == EROFS)) {
*fd = backed_file_open(path, O_RDONLY|O_LARGEFILE|lu->bsoflags,
size, &blksize);
lu->attrs.readonly = 1;
}
if (*fd < 0)
return *fd;
if (!lu->attrs.no_auto_lbppbe)
update_lbppbe(lu, blksize);
return 0;
}
static struct tgt_device *bd_mmap_open(char *path, int *fd, uint64_t *size)
{
struct tgt_device *dev;
dev = zalloc(sizeof(*dev));
if (!dev)
return NULL;
*fd = backed_file_open(path, O_RDWR| O_LARGEFILE, size);
if (*fd < 0) {
free(dev);
dev = NULL;
}
return dev;
}
static int bs_ssc_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
struct ssc_info *ssc;
char *cart = NULL;
ssize_t rd;
int ret;
struct blk_header_info *h;
ssc = dtype_priv(lu);
*fd = backed_file_open(path, O_RDWR | O_LARGEFILE, size, NULL);
if (*fd < 0) {
eprintf("Could not open %s %m\n", path);
return *fd;
}
eprintf("Backing store %s, %d\n", path, *fd);
if (*size < SSC_BLK_HDR_SIZE + sizeof(struct MAM)) {
eprintf("backing file too small - not correct media format\n");
return -1;
}
h = &ssc->c_blk;
/* Can't call 'resp_rewind() at this point as lu data not
* setup */
rd = ssc_read_blkhdr(*fd, h, 0);
if (rd) {
eprintf("Failed to read complete blk header: %d %m\n", (int)rd);
return -1;
}
ret = ssc_read_mam_info(*fd, &ssc->mam);
if (ret) {
eprintf("Failed to read MAM: %d %m\n", (int)rd);
return -1;
}
rd = ssc_read_blkhdr(*fd, h, h->next);
if (rd) {
eprintf("Failed to read complete blk header: %d %m\n", (int)rd);
return -1;
}
switch (ssc->mam.medium_type) {
case CART_CLEAN:
cart = "Cleaning cartridge";
break;
case CART_DATA:
cart = "data cartridge";
break;
case CART_WORM:
cart = "WORM cartridge";
break;
default:
cart = "Unknown cartridge type";
break;
}
dprintf("Media size: %d, media type: %s\n", h->blk_sz, cart);
return 0;
}
