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From:   Lukas Czerner <lczerner@redhat.com>
To:     linux-ext4@vger.kernel.org
Cc:     Theodore Ts'o <tytso@mit.edu>, David Howells <dhowells@redhat.com>,
        Al Viro <viro@zeniv.linux.org.uk>
Subject: [PATCH 11/17] ext4: add ext4_get_tree for the new mount API
Date:   Wed,  6 Nov 2019 11:14:51 +0100
Message-Id: <20191106101457.11237-12-lczerner@redhat.com>
In-Reply-To: <20191106101457.11237-1-lczerner@redhat.com>
References: <20191106101457.11237-1-lczerner@redhat.com>
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Sender: linux-ext4-owner@vger.kernel.org
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Signed-off-by: Lukas Czerner <lczerner@redhat.com>
---
 fs/ext4/super.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index dabb55bb999f..76f7d742de8e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -93,6 +93,7 @@ static int ext4_check_opt_consistency(struct fs_context *=
fc,
 =09=09=09=09      struct super_block *sb);
 static void ext4_apply_options(struct fs_context *fc, struct super_block *=
sb);
 static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *pa=
ram);
+static int ext4_get_tree(struct fs_context *fc);
=20
 /*
  * Lock ordering
@@ -124,6 +125,7 @@ static int ext4_parse_param(struct fs_context *fc, stru=
ct fs_parameter *param);
=20
 static const struct fs_context_operations ext4_context_ops =3D {
 =09.parse_param=09=3D ext4_parse_param,
+=09.get_tree=09=3D ext4_get_tree,
 };
=20
 #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined=
(CONFIG_EXT4_USE_FOR_EXT2)
@@ -5215,6 +5217,42 @@ static int ext4_fill_super(struct super_block *sb, v=
oid *data, int silent)
 =09return ret;
 }
=20
+static int ext4_fill_super_fc(struct super_block *sb, struct fs_context *f=
c)
+{
+=09struct ext4_fs_context *ctx =3D fc->fs_private;
+=09struct ext4_sb_info *sbi;
+=09int ret;
+
+=09sbi =3D ext4_alloc_sbi(sb);
+=09if (!sbi)
+=09=09return -ENOMEM;
+
+=09fc->s_fs_info =3D sbi;
+
+=09/* Cleanup superblock name */
+=09strreplace(sb->s_id, '/', '!');
+
+=09sbi->s_sb_block =3D 1;=09/* Default super block location */
+=09if (ctx->spec & EXT4_SPEC_s_sb_block)
+=09=09sbi->s_sb_block =3D ctx->s_sb_block;
+
+=09ret =3D __ext4_fill_super(fc, sb, fc->sb_flags & SB_SILENT);
+=09if (ret < 0)
+=09=09goto free_sbi;
+
+=09return 0;
+
+free_sbi:
+=09ext4_free_sbi(sbi);
+=09fc->s_fs_info =3D NULL;
+=09return ret;
+}
+
+static int ext4_get_tree(struct fs_context *fc)
+{
+=09return get_tree_bdev(fc, ext4_fill_super_fc);
+}
+
 /*
  * Setup any per-fs journal parameters now.  We'll do this both on
  * initial mount, once the journal has been initialised but before we've
--=20
2.21.0