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iomap: add support for dma aligned direct-io 

Use the address alignment requirements from the block_device for direct
io instead of requiring addresses be aligned to the block size.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220610195830.3574005-12-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2022-06-10 12:58:30 -07:00 committed by Jens Axboe
parent b1a000d3b8
commit bf8d08532b
1 changed files with 2 additions and 2 deletions
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4
fs/iomap/direct-io.c
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@ -242,7 +242,6 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
struct inode *inode = iter->inode;
unsigned int blkbits = blksize_bits(bdev_logical_block_size(iomap->bdev));
unsigned int fs_block_size = i_blocksize(inode), pad;
unsigned int align = iov_iter_alignment(dio->submit.iter);
loff_t length = iomap_length(iter);
loff_t pos = iter->pos;
unsigned int bio_opf;
@ -253,7 +252,8 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
size_t copied = 0;
size_t orig_count;
if ((pos | length | align) & ((1 << blkbits) - 1))
if ((pos | length) & ((1 << blkbits) - 1) ||
!bdev_iter_is_aligned(iomap->bdev, dio->submit.iter))
return -EINVAL;
if (iomap->type == IOMAP_UNWRITTEN) {