Commit bc804a8d authored by Gao Xiang's avatar Gao Xiang
Browse files

erofs: handle end of filesystem properly for file-backed mounts 



I/O requests beyond the end of the filesystem should be zeroed out,
similar to loopback devices and that is what we expect.

Fixes: ce63cb62 ("erofs: support unencoded inodes for fileio")
Signed-off-by: default avatarGao Xiang <hsiangkao@linux.alibaba.com>
parent 7cef3c83

fs/erofs/fileio.c

+8 −12
Original line number Diff line number Diff line
@@ -24,21 +24,17 @@ static void erofs_fileio_ki_complete(struct kiocb *iocb, long ret) 
			container_of(iocb, struct erofs_fileio_rq, iocb);

	struct folio_iter fi;



	if (ret > 0) {

		if (ret != rq->bio.bi_iter.bi_size) {

	if (ret >= 0 && ret != rq->bio.bi_iter.bi_size) {

		bio_advance(&rq->bio, ret);

		zero_fill_bio(&rq->bio);

	}

		ret = 0;

	}

	if (rq->bio.bi_end_io) {

		if (ret < 0 && !rq->bio.bi_status)

			rq->bio.bi_status = errno_to_blk_status(ret);

	} else {

	if (!rq->bio.bi_end_io) {

		bio_for_each_folio_all(fi, &rq->bio) {

			DBG_BUGON(folio_test_uptodate(fi.folio));

			erofs_onlinefolio_end(fi.folio, ret, false);

			erofs_onlinefolio_end(fi.folio, ret < 0, false);

		}

	} else if (ret < 0 && !rq->bio.bi_status) {

		rq->bio.bi_status = errno_to_blk_status(ret);

	}

	bio_endio(&rq->bio);

	bio_uninit(&rq->bio);
@@ -48,7 +44,7 @@ static void erofs_fileio_ki_complete(struct kiocb *iocb, long ret) 
static void erofs_fileio_rq_submit(struct erofs_fileio_rq *rq)

{

	struct iov_iter iter;

	int ret;

	ssize_t ret;



	if (!rq)

		return;