ceph: update readpages osd request according to size of pages

add_to_page_cache_lru() can fails, so the actual pages to read
can be smaller than the initial size of osd request. We need to
update osd request size in that case.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 39852567d66e8382c520bebd88b60b380e152832..4547bbf80e4f4ba62bc06d8acb5431a4c4bf04f7 100644 (file)
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -391,6 +391,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
                        nr_pages = i;
                        if (nr_pages > 0) {
                                len = nr_pages << PAGE_SHIFT;
+                               osd_req_op_extent_update(req, 0, len);
                                break;
                        }
                        goto out_pages;

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 842f049abb86d9233f23581ea1a0cc003a0d7ecb..3a2417bb6ff061ff1fc61f56849c870339591d9f 100644 (file)
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -672,7 +672,8 @@ void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
        BUG_ON(length > previous);
 
        op->extent.length = length;
-       op->indata_len -= previous - length;
+       if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
+               op->indata_len -= previous - length;
 }
 EXPORT_SYMBOL(osd_req_op_extent_update);