ceph: negotiate authentication protocol; implement AUTH_NONE protocol

When we open a monitor session, we send an initial AUTH message listing
the auth protocols we support, our entity name, and (possibly) a previously
assigned global_id.  The monitor chooses a protocol and responds with an
initial message.

Initially implement AUTH_NONE, a dummy protocol that provides no security,
but works within the new framework.  It generates 'authorizers' that are
used when connecting to (mds, osd) services that simply state our entity
name and global_id.

This is a wire protocol change.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 19 insertions, 13 deletions

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index fe0a596..c901395 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -128,6 +128,8 @@ static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
 		seq_puts(m, ",noasyncreaddir");
 	if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
 		seq_printf(m, ",snapdirname=%s", args->snapdir_name);
+	if (args->name)
+		seq_printf(m, ",name=%s", args->name);
 	if (args->secret)
 		seq_puts(m, ",secret=<hidden>");
 	return 0;
@@ -224,12 +226,12 @@ const char *ceph_msg_type_name(int type)
 	switch (type) {
 	case CEPH_MSG_SHUTDOWN: return "shutdown";
 	case CEPH_MSG_PING: return "ping";
+	case CEPH_MSG_AUTH: return "auth";
+	case CEPH_MSG_AUTH_REPLY: return "auth_reply";
 	case CEPH_MSG_MON_MAP: return "mon_map";
 	case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
 	case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
 	case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
-	case CEPH_MSG_CLIENT_MOUNT: return "client_mount";
-	case CEPH_MSG_CLIENT_MOUNT_ACK: return "client_mount_ack";
 	case CEPH_MSG_STATFS: return "statfs";
 	case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
 	case CEPH_MSG_MDS_MAP: return "mds_map";
@@ -267,6 +269,7 @@ enum {
 	Opt_last_int,
 	/* int args above */
 	Opt_snapdirname,
+	Opt_name,
 	Opt_secret,
 	Opt_last_string,
 	/* string args above */
@@ -293,6 +296,7 @@ static match_table_t arg_tokens = {
 	{Opt_readdir_max_entries, "readdir_max_entries=%d"},
 	/* int args above */
 	{Opt_snapdirname, "snapdirname=%s"},
+	{Opt_name, "name=%s"},
 	{Opt_secret, "secret=%s"},
 	/* string args above */
 	{Opt_ip, "ip=%s"},
@@ -407,6 +411,11 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
 					      argstr[0].to-argstr[0].from,
 					      GFP_KERNEL);
 			break;
+		case Opt_name:
+			args->name = kstrndup(argstr[0].from,
+					      argstr[0].to-argstr[0].from,
+					      GFP_KERNEL);
+			break;
 		case Opt_secret:
 			args->secret = kstrndup(argstr[0].from,
 						argstr[0].to-argstr[0].from,
@@ -476,6 +485,8 @@ static void destroy_mount_args(struct ceph_mount_args *args)
 	dout("destroy_mount_args %p\n", args);
 	kfree(args->snapdir_name);
 	args->snapdir_name = NULL;
+	kfree(args->name);
+	args->name = NULL;
 	kfree(args->secret);
 	args->secret = NULL;
 	kfree(args);
@@ -657,27 +668,23 @@ static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt,
 		client->msgr->nocrc = ceph_test_opt(client, NOCRC);
 	}
 
-	/* send mount request, and wait for mon, mds, and osd maps */
-	err = ceph_monc_request_mount(&client->monc);
+	/* open session, and wait for mon, mds, and osd maps */
+	err = ceph_monc_open_session(&client->monc);
 	if (err < 0)
 		goto out;
 
-	while (!have_mon_map(client) && !client->mount_err) {
+	while (!have_mon_map(client)) {
 		err = -EIO;
 		if (timeout && time_after_eq(jiffies, started + timeout))
 			goto out;
 
 		/* wait */
-		dout("mount waiting for mount\n");
-		err = wait_event_interruptible_timeout(client->mount_wq,
-			       client->mount_err || have_mon_map(client),
+		dout("mount waiting for mon_map\n");
+		err = wait_event_interruptible_timeout(client->mount_wq, /* FIXME */
+			       have_mon_map(client),
 			       timeout);
 		if (err == -EINTR || err == -ERESTARTSYS)
 			goto out;
-		if (client->mount_err) {
-			err = client->mount_err;
-			goto out;
-		}
 	}
 
 	dout("mount opening root\n");
@@ -795,7 +802,6 @@ static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client)
 		client->backing_dev_info.ra_pages =
 			(client->mount_args->rsize + PAGE_CACHE_SIZE - 1)
 			>> PAGE_SHIFT;
-
 	err = bdi_register_dev(&client->backing_dev_info, sb->s_dev);
 	return err;
 }