diff options
Diffstat (limited to 'include/sys/blkdev.h')
| -rw-r--r-- | include/sys/blkdev.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/sys/blkdev.h b/include/sys/blkdev.h index b84f66aed..7102890f1 100644 --- a/include/sys/blkdev.h +++ b/include/sys/blkdev.h @@ -202,6 +202,38 @@ struct req_iterator { bio_for_each_segment(bvl, _iter.bio, _iter.i) #endif /* HAVE_RQ_FOR_EACH_SEGMENT */ +static inline void +bio_set_flags_failfast(struct block_device *bdev, int *flags) +{ +#ifdef HAVE_BIO_RW_FAILFAST + /* + * Disable BIO_RW_FAILFAST_* for loopback devices because of + * the following incorrect BUG_ON() in loop_make_request(). + * This support is also disabled for md devices because the + * test suite layers md devices on top of loopback devices. + * This may be removed when the loopback driver is fixed. + * + * BUG_ON(!lo || (rw != READ && rw != WRITE)); + */ +#ifdef CONFIG_BUG + if ((MAJOR(bdev->bd_dev) == LOOP_MAJOR) || + (MAJOR(bdev->bd_dev) == MD_MAJOR)) + return; + +#ifdef BLOCK_EXT_MAJOR + if (MAJOR(bdev->bd_dev) == BLOCK_EXT_MAJOR) + return; +#endif /* BLOCK_EXT_MAJOR */ +#endif /* CONFIG_BUG */ + *flags |= + ((1 << BIO_RW_FAILFAST_DEV) | + (1 << BIO_RW_FAILFAST_TRANSPORT) | + (1 << BIO_RW_FAILFAST_DRIVER)); +#else /* !HAVE_BIO_RW_FAILFAST */ + *flags |= (1 << BIO_RW_FAILFAST); +#endif /* HAVE_BIO_RW_FAILFAST */ +} + #ifndef DISK_NAME_LEN #define DISK_NAME_LEN 32 #endif /* DISK_NAME_LEN */ |