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ceph: connect to export targets if mds is laggy

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If an MDS we are talking to may have failed, we need to open sessions to
its potential export targets to ensure that any in-progress migration that
may have involved some of our caps is properly handled.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2010-06-21 13:38:35 -07:00
parent ed0552a1a2
commit cb170a2215
1 changed files with 15 additions and 0 deletions
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15
fs/ceph/mds_client.c
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@ -2470,6 +2470,21 @@ static void check_new_map(struct ceph_mds_client *mdsc,
wake_up_session_caps(s, 1);
}
}
for (i = 0; i < newmap->m_max_mds && i < mdsc->max_sessions; i++) {
s = mdsc->sessions[i];
if (!s)
continue;
if (!ceph_mdsmap_is_laggy(newmap, i))
continue;
if (s->s_state == CEPH_MDS_SESSION_OPEN ||
s->s_state == CEPH_MDS_SESSION_HUNG ||
s->s_state == CEPH_MDS_SESSION_CLOSING) {
dout(" connecting to export targets of laggy mds%d\n",
i);
__open_export_target_sessions(mdsc, s);
}
}
}