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authorGoldwyn Rodrigues <rgoldwyn@suse.com>2019-05-15 02:54:27 +0300
committerDavid Sterba <dsterba@suse.com>2020-05-25 14:12:53 +0300
commit8cecd0ba854799cda72d03a470e7de9eed3ed6c4 (patch)
tree068594b4b87e65dac33b18629981fbba91b11c61 /fs/iomap
parentd85dc2e116fdce776280224ed2bee4c78e5e5af2 (diff)
downloadlinux-8cecd0ba854799cda72d03a470e7de9eed3ed6c4.tar.xz
iomap: add a filesystem hook for direct I/O bio submission
This helps filesystems to perform tasks on the bio while submitting for I/O. This could be post-write operations such as data CRC or data replication for fs-handled RAID. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/iomap')
-rw-r--r--fs/iomap/direct-io.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 20dde5aadcdd..f88ba6e7f6af 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -59,7 +59,7 @@ int iomap_dio_iopoll(struct kiocb *kiocb, bool spin)
EXPORT_SYMBOL_GPL(iomap_dio_iopoll);
static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
- struct bio *bio)
+ struct bio *bio, loff_t pos)
{
atomic_inc(&dio->ref);
@@ -67,7 +67,12 @@ static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
bio_set_polled(bio, dio->iocb);
dio->submit.last_queue = bdev_get_queue(iomap->bdev);
- dio->submit.cookie = submit_bio(bio);
+ if (dio->dops && dio->dops->submit_io)
+ dio->submit.cookie = dio->dops->submit_io(
+ file_inode(dio->iocb->ki_filp),
+ iomap, bio, pos);
+ else
+ dio->submit.cookie = submit_bio(bio);
}
static ssize_t iomap_dio_complete(struct iomap_dio *dio)
@@ -191,7 +196,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
get_page(page);
__bio_add_page(bio, page, len, 0);
bio_set_op_attrs(bio, REQ_OP_WRITE, flags);
- iomap_dio_submit_bio(dio, iomap, bio);
+ iomap_dio_submit_bio(dio, iomap, bio, pos);
}
static loff_t
@@ -299,11 +304,11 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
}
dio->size += n;
- pos += n;
copied += n;
nr_pages = iov_iter_npages(dio->submit.iter, BIO_MAX_PAGES);
- iomap_dio_submit_bio(dio, iomap, bio);
+ iomap_dio_submit_bio(dio, iomap, bio, pos);
+ pos += n;
} while (nr_pages);
/*