ceph: add status debugfs file

This will help list some useful client side info, like the client
entity address/name and blocklisted status, etc.

URL: https://tracker.ceph.com/issues/48057
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 7a8fbe3..66989c8 100644 (file)
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -304,11 +304,25 @@ static int mds_sessions_show(struct seq_file *s, void *ptr)
        return 0;
 }
 
+static int status_show(struct seq_file *s, void *p)
+{
+       struct ceph_fs_client *fsc = s->private;
+       struct ceph_entity_inst *inst = &fsc->client->msgr.inst;
+       struct ceph_entity_addr *client_addr = ceph_client_addr(fsc->client);
+
+       seq_printf(s, "instance: %s.%lld %s/%u\n", ENTITY_NAME(inst->name),
+                  ceph_pr_addr(client_addr), le32_to_cpu(client_addr->nonce));
+       seq_printf(s, "blocklisted: %s\n", fsc->blocklisted ? "true" : "false");
+
+       return 0;
+}
+
 DEFINE_SHOW_ATTRIBUTE(mdsmap);
 DEFINE_SHOW_ATTRIBUTE(mdsc);
 DEFINE_SHOW_ATTRIBUTE(caps);
 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
 DEFINE_SHOW_ATTRIBUTE(metric);
+DEFINE_SHOW_ATTRIBUTE(status);
 
 
 /*
@@ -394,6 +408,12 @@ void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
                                                fsc->client->debugfs_dir,
                                                fsc,
                                                &caps_fops);
+
+       fsc->debugfs_status = debugfs_create_file("status",
+                                                 0400,
+                                                 fsc->client->debugfs_dir,
+                                                 fsc,
+                                                 &status_fops);
 }
 
 

diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f097237..5138b75 100644 (file)
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -128,6 +128,7 @@ struct ceph_fs_client {
        struct dentry *debugfs_bdi;
        struct dentry *debugfs_mdsc, *debugfs_mdsmap;
        struct dentry *debugfs_metric;
+       struct dentry *debugfs_status;
        struct dentry *debugfs_mds_sessions;
 #endif