diff options
Diffstat (limited to 'tools/blktap/drivers/blk_linux.c')
| -rw-r--r-- | tools/blktap/drivers/blk_linux.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/tools/blktap/drivers/blk_linux.c b/tools/blktap/drivers/blk_linux.c new file mode 100644 index 0000000000..f1b14bd6e8 --- /dev/null +++ b/tools/blktap/drivers/blk_linux.c @@ -0,0 +1,42 @@ +#include <inttypes.h> +#include <sys/ioctl.h> +#include <linux/fs.h> +#include "tapdisk.h" +#include "blk.h" + +int blk_getimagesize(int fd, uint64_t *size) +{ + int rc; + + *size = 0; + rc = ioctl(fd, BLKGETSIZE, size); + if (rc) { + DPRINTF("ERR: BLKGETSIZE failed, couldn't stat image"); + return -EINVAL; + } + + return 0; +} + +int blk_getsectorsize(int fd, uint64_t *sector_size) +{ +#if defined(BLKSSZGET) + int rc; + + *sector_size = DEFAULT_SECTOR_SIZE; + rc = ioctl(fd, BLKSSZGET, sector_size); + if (rc) { + DPRINTF("ERR: BLKSSZGET failed. Falling back to use default sector size"); + *sector_size = DEFAULT_SECTOR_SIZE; + } + + if (*sector_size != DEFAULT_SECTOR_SIZE) + DPRINTF("Note: sector size is %"PRIu64" (not %u)\n", + *sector_size, DEFAULT_SECTOR_SIZE); +#else + *sector_size = DEFAULT_SECTOR_SIZE; +#endif + + return 0; +} + |