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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 2026-01-30 15:54:22 +08:00
parent 7cef3c8341
commit bc804a8d7e
1 changed files with 8 additions and 12 deletions
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20
fs/erofs/fileio.c
View file

@ -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) {
bio_advance(&rq->bio, ret);
zero_fill_bio(&rq->bio);
}
ret = 0;
if (ret >= 0 && ret != rq->bio.bi_iter.bi_size) {
bio_advance(&rq->bio, ret);
zero_fill_bio(&rq->bio);
}
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;