ceph: limit osd read size to CEPH_MSG_MAX_DATA_LEN
libceph returns -EIO when read size > CEPH_MSG_MAX_DATA_LEN.
Link: http://tracker.ceph.com/issues/20528
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 1bc709f..63ca173 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -455,13 +455,9 @@
if (rc == 0)
goto out;
- if (fsc->mount_options->rsize >= PAGE_SIZE)
- max = (fsc->mount_options->rsize + PAGE_SIZE - 1)
- >> PAGE_SHIFT;
-
- dout("readpages %p file %p nr_pages %d max %d\n", inode,
- file, nr_pages,
- max);
+ max = fsc->mount_options->rsize >> PAGE_SHIFT;
+ dout("readpages %p file %p nr_pages %d max %d\n",
+ inode, file, nr_pages, max);
while (!list_empty(page_list)) {
rc = start_read(inode, page_list, max);
if (rc < 0)