ceph: additional debugfs output
MDS session state and client global ID is
useful instrumentation when testing.
Signed-off-by: John Spray <john.spray@redhat.com>
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 5a743ac..5d5a4c8 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -158,10 +158,47 @@
return 0;
}
+static int mds_sessions_show(struct seq_file *s, void *ptr)
+{
+ struct ceph_fs_client *fsc = s->private;
+ struct ceph_mds_client *mdsc = fsc->mdsc;
+ struct ceph_auth_client *ac = fsc->client->monc.auth;
+ struct ceph_options *opt = fsc->client->options;
+ int mds = -1;
+
+ mutex_lock(&mdsc->mutex);
+
+ /* The 'num' portion of an 'entity name' */
+ seq_printf(s, "global_id %llu\n", ac->global_id);
+
+ /* The -o name mount argument */
+ seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
+
+ /* The list of MDS session rank+state */
+ for (mds = 0; mds < mdsc->max_sessions; mds++) {
+ struct ceph_mds_session *session =
+ __ceph_lookup_mds_session(mdsc, mds);
+ if (!session) {
+ continue;
+ }
+ mutex_unlock(&mdsc->mutex);
+ seq_printf(s, "mds.%d %s\n",
+ session->s_mds,
+ ceph_session_state_name(session->s_state));
+
+ ceph_put_mds_session(session);
+ mutex_lock(&mdsc->mutex);
+ }
+ mutex_unlock(&mdsc->mutex);
+
+ return 0;
+}
+
CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
CEPH_DEFINE_SHOW_FUNC(mdsc_show)
CEPH_DEFINE_SHOW_FUNC(caps_show)
CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
+CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
/*
@@ -193,6 +230,7 @@
debugfs_remove(fsc->debugfs_bdi);
debugfs_remove(fsc->debugfs_congestion_kb);
debugfs_remove(fsc->debugfs_mdsmap);
+ debugfs_remove(fsc->debugfs_mds_sessions);
debugfs_remove(fsc->debugfs_caps);
debugfs_remove(fsc->debugfs_mdsc);
debugfs_remove(fsc->debugfs_dentry_lru);
@@ -231,6 +269,14 @@
if (!fsc->debugfs_mdsmap)
goto out;
+ fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
+ 0600,
+ fsc->client->debugfs_dir,
+ fsc,
+ &mds_sessions_show_fops);
+ if (!fsc->debugfs_mds_sessions)
+ goto out;
+
fsc->debugfs_mdsc = debugfs_create_file("mdsc",
0600,
fsc->client->debugfs_dir,
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f62a098..b82f507 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -95,6 +95,7 @@
struct dentry *debugfs_congestion_kb;
struct dentry *debugfs_bdi;
struct dentry *debugfs_mdsc, *debugfs_mdsmap;
+ struct dentry *debugfs_mds_sessions;
#endif
#ifdef CONFIG_CEPH_FSCACHE