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authorIlya Dryomov <ilya.dryomov@inktank.com>2014-05-13 11:19:27 +0400
committerYan, Zheng <zheng.z.yan@intel.com>2014-06-06 09:29:57 +0800
commit6044cde6f2a94d88142d4401624152a741866338 (patch)
tree9c58a1e13db9dd410b680291eeda15b226bac9e1 /net/ceph
parent513a8243d67f8e8d27f2883bd2f18bc87c7ca376 (diff)
downloadlinux-6044cde6f2a94d88142d4401624152a741866338.tar.bz2
libceph: add ceph_monc_wait_osdmap()
Add ceph_monc_wait_osdmap(), which will block until the osdmap with the specified epoch is received or timeout occurs. Export both of these as they are going to be needed by rbd. Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/mon_client.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index 11d8d2f2708a..067d3af2eaf6 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -296,6 +296,33 @@ void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc)
__send_subscribe(monc);
mutex_unlock(&monc->mutex);
}
+EXPORT_SYMBOL(ceph_monc_request_next_osdmap);
+
+int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
+ unsigned long timeout)
+{
+ unsigned long started = jiffies;
+ int ret;
+
+ mutex_lock(&monc->mutex);
+ while (monc->have_osdmap < epoch) {
+ mutex_unlock(&monc->mutex);
+
+ if (timeout != 0 && time_after_eq(jiffies, started + timeout))
+ return -ETIMEDOUT;
+
+ ret = wait_event_interruptible_timeout(monc->client->auth_wq,
+ monc->have_osdmap >= epoch, timeout);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&monc->mutex);
+ }
+
+ mutex_unlock(&monc->mutex);
+ return 0;
+}
+EXPORT_SYMBOL(ceph_monc_wait_osdmap);
/*
*