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

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

Fixes: ce63cb62d7 ("erofs: support unencoded inodes for fileio")
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
This commit is contained in:
Gao Xiang
2026-02-03 11:05:57 +08:00
parent 7cef3c8341
commit bc804a8d7e
1 changed files with 8 additions and 12 deletions
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fs/erofs/fileio.c
+8 -12
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@@ -24,21 +24,17 @@ static void erofs_fileio_ki_complete(struct kiocb *iocb, long ret)
container_of(iocb, struct erofs_fileio_rq, iocb); container_of(iocb, struct erofs_fileio_rq, iocb);
struct folio_iter fi; struct folio_iter fi;
if (ret > 0) { if (ret >= 0 && ret != rq->bio.bi_iter.bi_size) {
if (ret != rq->bio.bi_iter.bi_size) { bio_advance(&rq->bio, ret);
bio_advance(&rq->bio, ret); zero_fill_bio(&rq->bio);
zero_fill_bio(&rq->bio);
}
ret = 0;
} }
if (rq->bio.bi_end_io) { if (!rq->bio.bi_end_io) {
if (ret < 0 && !rq->bio.bi_status)
rq->bio.bi_status = errno_to_blk_status(ret);
} else {
bio_for_each_folio_all(fi, &rq->bio) { bio_for_each_folio_all(fi, &rq->bio) {
DBG_BUGON(folio_test_uptodate(fi.folio)); 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_endio(&rq->bio);
bio_uninit(&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) static void erofs_fileio_rq_submit(struct erofs_fileio_rq *rq)
{ {
struct iov_iter iter; struct iov_iter iter;
int ret; ssize_t ret;
if (!rq) if (!rq)
return; return;