[PATCH 3/4] block_dev: support protect information passthrough
From: Bob Liu <hidden>
Date: 2020-02-26 08:39:00
Also in:
io-uring, linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Support protect information passed from use sapce, on direct io is considered now. Signed-off-by: Bob Liu <redacted> --- fs/block_dev.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 69bf2fb..10e3299 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c@@ -348,6 +348,13 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) loff_t pos = iocb->ki_pos; blk_qc_t qc = BLK_QC_T_NONE; int ret = 0; + struct iovec *pi_iov; + + if (iocb->ki_flags & IOCB_USE_PI) { + ret = iter_slice_protect_info(iter, nr_pages, &pi_iov); + if (ret) + return -EINVAL; + } if ((pos | iov_iter_alignment(iter)) & (bdev_logical_block_size(bdev) - 1))
@@ -411,6 +418,16 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) polled = true; } + /* Add protection information to bio */ + if (iocb->ki_flags & IOCB_USE_PI) { + ret = bio_integrity_prep_from_iovec(bio, pi_iov); + if (ret) { + bio->bi_status = BLK_STS_IOERR; + bio_endio(bio); + break; + } + } + qc = submit_bio(bio); if (polled)
--
2.9.5