From ed0552a1a21d2f2692b84c366ce04ad17377780c Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Mon, 21 Jun 2010 13:38:25 -0700 Subject: ceph: introduce helper to connect to mds export targets There are a few cases where we need to open sessions with a given mds's potential export targets. Signed-off-by: Sage Weil --- fs/ceph/mds_client.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'fs/ceph') diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 641a8a37e7b..462602ec7fb 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -704,6 +704,43 @@ static int __open_session(struct ceph_mds_client *mdsc, return 0; } +/* + * open sessions for any export targets for the given mds + * + * called under mdsc->mutex + */ +static void __open_export_target_sessions(struct ceph_mds_client *mdsc, + struct ceph_mds_session *session) +{ + struct ceph_mds_info *mi; + struct ceph_mds_session *ts; + int i, mds = session->s_mds; + int target; + + if (mds >= mdsc->mdsmap->m_max_mds) + return; + mi = &mdsc->mdsmap->m_info[mds]; + dout("open_export_target_sessions for mds%d (%d targets)\n", + session->s_mds, mi->num_export_targets); + + for (i = 0; i < mi->num_export_targets; i++) { + target = mi->export_targets[i]; + ts = __ceph_lookup_mds_session(mdsc, target); + if (!ts) { + ts = register_session(mdsc, target); + if (IS_ERR(ts)) + return; + } + if (session->s_state == CEPH_MDS_SESSION_NEW || + session->s_state == CEPH_MDS_SESSION_CLOSING) + __open_session(mdsc, session); + else + dout(" mds%d target mds%d %p is %s\n", session->s_mds, + i, ts, session_state_name(ts->s_state)); + ceph_put_mds_session(ts); + } +} + /* * session caps */ -- cgit v1.2.3-70-g09d2