Since we have held the Fr capibility it's safe to skip reading from
Rados if the ki_pos is larger than or euqals to the file size.
Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
---
fs/ceph/file.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 6c9e837aa1d3..330e42b3afec 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1614,7 +1614,9 @@ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
return ret;
}
- if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
+ if (unlikely(iocb->ki_pos >= i_size_read(inode))) {
+ ret = 0;
+ } else if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
(iocb->ki_flags & IOCB_DIRECT) ||
(fi->flags & CEPH_F_SYNC)) {
--
2.36.0.rc1
