diff options
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/block/bio.c b/block/bio.c index 1319dd2aa0b8..e16849f46b0e 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1544,12 +1544,15 @@ EXPORT_SYMBOL(bio_split); * @bio: bio to trim * @offset: number of sectors to trim from the front of @bio * @size: size we want to trim @bio to, in sectors + * + * This function is typically used for bios that are cloned and submitted + * to the underlying device in parts. */ -void bio_trim(struct bio *bio, int offset, int size) +void bio_trim(struct bio *bio, sector_t offset, sector_t size) { - /* 'bio' is a cloned bio which we need to trim to match - * the given offset and size. - */ + if (WARN_ON_ONCE(offset > BIO_MAX_SECTORS || size > BIO_MAX_SECTORS || + offset + size > bio->bi_iter.bi_size)) + return; size <<= 9; if (offset == 0 && size == bio->bi_iter.bi_size) @@ -1560,7 +1563,6 @@ void bio_trim(struct bio *bio, int offset, int size) if (bio_integrity(bio)) bio_integrity_trim(bio); - } EXPORT_SYMBOL_GPL(bio_trim); |