diff options
| -rw-r--r-- | include/blkdev.h | 3 | ||||
| -rw-r--r-- | lib/blkdev.c | 12 |
2 files changed, 15 insertions, 0 deletions
diff --git a/include/blkdev.h b/include/blkdev.h index b6c46edde..6a641723f 100644 --- a/include/blkdev.h +++ b/include/blkdev.h @@ -92,4 +92,7 @@ int blkdev_get_sectors(int fd, unsigned long long *sectors); /* get hardware sector size */ int blkdev_get_sector_size(int fd, int *sector_size); +/* specifies whether or not the device is misaligned */ +int blkdev_is_misaligned(int fd); + #endif /* BLKDEV_H */ diff --git a/lib/blkdev.c b/lib/blkdev.c index 0c27a6df9..fb69e88b5 100644 --- a/lib/blkdev.c +++ b/lib/blkdev.c @@ -205,6 +205,18 @@ blkdev_get_sector_size(int fd, int *sector_size) } +/* + * Return the alignment status of a device + */ +int blkdev_is_misaligned(int fd) +{ + int aligned; + + if (ioctl(fd, BLKALIGNOFF, &aligned) < 0) + return 0; /* probably kernel < 2.6.32 */ + return aligned; +} + #ifdef TEST_PROGRAM #include <stdio.h> #include <stdlib.h> |