From: Yehuda Sadeh Date: Fri, 19 Feb 2010 00:07:01 +0000 (+0000) Subject: ceph: remove page upon writeback completion if lost cache cap X-Git-Tag: firefly_0821_release~9833^2~2552^2~23 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e63dc5c780ba32d6d8b3662eecce2b8d96489b41;p=firefly-linux-kernel-4.4.55.git ceph: remove page upon writeback completion if lost cache cap This page should have been removed earlier when the cache cap was revoked, but a writeback was in flight, so it was skipped. We truncate it here just as the writeback finishes, while it's still locked. Signed-off-by: Yehuda Sadeh Signed-off-by: Sage Weil --- diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 71f5ad1c1e26..25360d517d1b 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -514,6 +514,7 @@ static void writepages_finish(struct ceph_osd_request *req, u64 bytes = 0; struct ceph_client *client = ceph_inode_to_client(inode); long writeback_stat; + unsigned issued = __ceph_caps_issued(ci, NULL); /* parse reply */ replyhead = msg->front.iov_base; @@ -559,6 +560,16 @@ static void writepages_finish(struct ceph_osd_request *req, ceph_put_snap_context(snapc); dout("unlocking %d %p\n", i, page); end_page_writeback(page); + + /* + * We lost the cache cap, need to truncate the page before + * it is unlocked, otherwise we'd truncate it later in the + * page truncation thread, possibly losing some data that + * raced its way in + */ + if ((issued & CEPH_CAP_FILE_CACHE) == 0) + generic_error_remove_page(inode->i_mapping, page); + unlock_page(page); } dout("%p wrote+cleaned %d pages\n", inode, wrote);