From 5d72d13c425bb41f7752962f168fb402b86b7ac0 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Sun, 24 Nov 2013 14:33:01 +0800 Subject: ceph: add open export target session helper Signed-off-by: Yan, Zheng --- fs/ceph/mds_client.c | 51 ++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 36 insertions(+), 15 deletions(-) (limited to 'fs/ceph/mds_client.c') diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 7c00dd530bd1..f4f050a69a48 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -847,35 +847,56 @@ static int __open_session(struct ceph_mds_client *mdsc, * * called under mdsc->mutex */ +static struct ceph_mds_session * +__open_export_target_session(struct ceph_mds_client *mdsc, int target) +{ + struct ceph_mds_session *session; + + session = __ceph_lookup_mds_session(mdsc, target); + if (!session) { + session = register_session(mdsc, target); + if (IS_ERR(session)) + return session; + } + if (session->s_state == CEPH_MDS_SESSION_NEW || + session->s_state == CEPH_MDS_SESSION_CLOSING) + __open_session(mdsc, session); + + return session; +} + +struct ceph_mds_session * +ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target) +{ + struct ceph_mds_session *session; + + dout("open_export_target_session to mds%d\n", target); + + mutex_lock(&mdsc->mutex); + session = __open_export_target_session(mdsc, target); + mutex_unlock(&mdsc->mutex); + + return session; +} + 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); + ts = __open_export_target_session(mdsc, mi->export_targets[i]); + if (!IS_ERR(ts)) + ceph_put_mds_session(ts); } } -- cgit v1.2.3-59-g8ed1b