From 3a59ff72a0b9bf3ee4cea7a886616edf5ab4f331 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Sat, 6 Apr 2019 17:45:19 -0400
Subject: [PATCH] initialize filesystem when formatting

makes it possible to mount ro for the first mount, helps with some
xfstests tests
---
 cmd_format.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/cmd_format.c b/cmd_format.c
index cffb8dc1..ae83a977 100644
--- a/cmd_format.c
+++ b/cmd_format.c
@@ -109,6 +109,7 @@ u64 read_flag_list_or_die(char *opt, const char * const list[],
 int cmd_format(int argc, char *argv[])
 {
 	darray(struct dev_opts) devices;
+	darray(char *) device_paths;
 	struct format_opts opts	= format_opts_default();
 	struct dev_opts dev_opts = dev_opts_default(), *dev;
 	bool force = false, no_passphrase = false, quiet = false;
@@ -116,6 +117,7 @@ int cmd_format(int argc, char *argv[])
 	int opt;
 
 	darray_init(devices);
+	darray_init(device_paths);
 
 	struct bch_opt_strs fs_opt_strs =
 		bch2_cmdline_opts_get(&argc, argv, OPT_FORMAT);
@@ -182,6 +184,7 @@ int cmd_format(int argc, char *argv[])
 				die("invalid durability");
 			break;
 		case O_no_opt:
+			darray_append(device_paths, optarg);
 			dev_opts.path = optarg;
 			darray_append(devices, dev_opts);
 			dev_opts.size = 0;
@@ -226,6 +229,21 @@ int cmd_format(int argc, char *argv[])
 
 	darray_free(devices);
 
+	if (!opts.passphrase) {
+		/*
+		 * Start the filesystem once, to allocate the journal and create
+		 * the root directory:
+		 */
+		struct bch_fs *c = bch2_fs_open(device_paths.item,
+						darray_size(device_paths),
+						bch2_opts_empty());
+		if (IS_ERR(c))
+			die("error opening %s: %s", device_paths.item,
+			    strerror(-PTR_ERR(c)));
+
+		bch2_fs_stop(c);
+	}
+
 	return 0;
 }