ceph: check availability of mds cluster on mount after wait timeout
[ Upstream commit 97820058fb
]
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 <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
7288d5338c
commit
bd4e189416
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@ -2552,8 +2552,7 @@ static void __do_request(struct ceph_mds_client *mdsc,
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if (!(mdsc->fsc->mount_options->flags &
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CEPH_MOUNT_OPT_MOUNTWAIT) &&
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!ceph_mdsmap_is_cluster_available(mdsc->mdsmap)) {
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err = -ENOENT;
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pr_info("probably no mds server is up\n");
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err = -EHOSTUNREACH;
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goto finish;
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}
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}
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@ -1137,6 +1137,11 @@ static struct dentry *ceph_mount(struct file_system_type *fs_type,
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return res;
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out_splat:
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if (!ceph_mdsmap_is_cluster_available(fsc->mdsc->mdsmap)) {
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pr_info("No mds server is up or the cluster is laggy\n");
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err = -EHOSTUNREACH;
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}
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ceph_mdsc_close_sessions(fsc->mdsc);
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deactivate_locked_super(sb);
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goto out_final;
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