[PATCH] ceph: redirty the folio/page when offset and size are not aligned

[Xiubo Li <xiubli@redhat.com>]

At the same time fix another buggy code because in writepages_finish
if the opcode doesn't equal to CEPH_OSD_OP_WRITE the request memory
must have been corrupted.

URL: https://tracker.ceph.com/issues/55421
Signed-off-by: Xiubo Li <xiubli@redhat.com>
---
 fs/ceph/addr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index e52b62407b10..ae224135440b 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -146,6 +146,8 @@ static void ceph_invalidate_folio(struct folio *folio, size_t offset,
 	if (offset != 0 || length != folio_size(folio)) {
 		dout("%p invalidate_folio idx %lu partial dirty page %zu~%zu\n",
 		     inode, folio->index, offset, length);
+		filemap_dirty_folio(folio->mapping, folio);
+		folio_account_redirty(folio);
 		return;
 	}
 
@@ -733,8 +735,7 @@ static void writepages_finish(struct ceph_osd_request *req)
 
 	/* clean all pages */
 	for (i = 0; i < req->r_num_ops; i++) {
-		if (req->r_ops[i].op != CEPH_OSD_OP_WRITE)
-			break;
+		BUG_ON(req->r_ops[i].op != CEPH_OSD_OP_WRITE);
 
 		osd_data = osd_req_op_extent_osd_data(req, i);
 		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
-- 
2.36.0.rc1