From 97820058fb2831a4b203981fa2566ceaaa396103 Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Tue, 10 Dec 2019 20:29:40 -0500 Subject: [PATCH] ceph: check availability of mds cluster on mount after wait timeout If all the MDS daemons are down for some reason, then the first mount attempt will fail with EIO after the mount request times out. A mount attempt will also fail with EIO if all of the MDS's are laggy. This patch changes the code to return -EHOSTUNREACH in these situations and adds a pr_info error message to help the admin determine the cause. URL: https://tracker.ceph.com/issues/4386 Signed-off-by: Xiubo Li Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov --- fs/ceph/mds_client.c | 3 +-- fs/ceph/super.c | 5 +++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 18fa8f8..e190266 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -2583,8 +2583,7 @@ static void __do_request(struct ceph_mds_client *mdsc, if (!(mdsc->fsc->mount_options->flags & CEPH_MOUNT_OPT_MOUNTWAIT) && !ceph_mdsmap_is_cluster_available(mdsc->mdsmap)) { - err = -ENOENT; - pr_info("probably no mds server is up\n"); + err = -EHOSTUNREACH; goto finish; } } diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 29a795f..430dcf3 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -1070,6 +1070,11 @@ static int ceph_get_tree(struct fs_context *fc) return 0; out_splat: + if (!ceph_mdsmap_is_cluster_available(fsc->mdsc->mdsmap)) { + pr_info("No mds server is up or the cluster is laggy\n"); + err = -EHOSTUNREACH; + } + ceph_mdsc_close_sessions(fsc->mdsc); deactivate_locked_super(sb); goto out_final; -- 2.7.4