bcachefs: Kill bch2_mount()

Fold into bch2_fs_get_tree()
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/fs.c

@@ -1888,25 +1888,24 @@ static int bch2_test_super(struct super_block *s, void *data)
 	return true;
 }
 
-static struct dentry *bch2_mount(struct file_system_type *fs_type,
-				 int flags, const char *dev_name,
-				 struct bch2_opts_parse opts_parse)
+static int bch2_fs_get_tree(struct fs_context *fc)
 {
 	struct bch_fs *c;
 	struct super_block *sb;
 	struct inode *vinode;
-	struct bch_opts opts = opts_parse.opts;
+	struct bch2_opts_parse *opts_parse = fc->fs_private;
+	struct bch_opts opts = opts_parse->opts;
 	int ret;
 
-	opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
+	opt_set(opts, read_only, (fc->sb_flags & SB_RDONLY) != 0);
 
-	if (!dev_name || strlen(dev_name) == 0)
-		return ERR_PTR(-EINVAL);
+	if (!fc->source || strlen(fc->source) == 0)
+		return -EINVAL;
 
 	darray_str devs;
-	ret = bch2_split_devs(dev_name, &devs);
+	ret = bch2_split_devs(fc->source, &devs);
 	if (ret)
-		return ERR_PTR(ret);
+		return ret;
 
 	darray_fs devs_to_fs = {};
 	darray_for_each(devs, i) {
@@ -1917,7 +1916,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 		}
 	}
 
-	sb = sget(fs_type, bch2_test_super, bch2_noset_super, flags|SB_NOSEC, &devs_to_fs);
+	sb = sget(fc->fs_type, bch2_test_super, bch2_noset_super, fc->sb_flags|SB_NOSEC, &devs_to_fs);
 	if (!IS_ERR(sb))
 		goto got_sb;
 
@@ -1928,7 +1927,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 	}
 
 	/* Some options can't be parsed until after the fs is started: */
-	ret = bch2_parse_mount_opts(c, &opts, NULL, opts_parse.parse_later.buf);
+	ret = bch2_parse_mount_opts(c, &opts, NULL, opts_parse->parse_later.buf);
 	if (ret) {
 		bch2_fs_stop(c);
 		sb = ERR_PTR(ret);
@@ -1937,7 +1936,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 
 	bch2_opts_apply(&c->opts, opts);
 
-	sb = sget(fs_type, NULL, bch2_set_super, flags|SB_NOSEC, c);
+	sb = sget(fc->fs_type, NULL, bch2_set_super, fc->sb_flags|SB_NOSEC, c);
 	if (IS_ERR(sb))
 		bch2_fs_stop(c);
 got_sb:
@@ -1952,7 +1951,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 	c = sb->s_fs_info;
 
 	if (sb->s_root) {
-		if ((flags ^ sb->s_flags) & SB_RDONLY) {
+		if ((fc->sb_flags ^ sb->s_flags) & SB_RDONLY) {
 			ret = -EBUSY;
 			goto err_put_super;
 		}
@@ -2018,7 +2017,8 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 
 	sb->s_flags |= SB_ACTIVE;
 out:
-	return dget(sb->s_root);
+	fc->root = dget(sb->s_root);
+	return 0;
 
 err_put_super:
 	__bch2_fs_stop(c);
@@ -2034,7 +2034,7 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
 	 */
 	if (bch2_err_matches(ret, EROFS) && ret != -EROFS)
 		ret = -EIO;
-	return ERR_PTR(bch2_err_class(ret));
+	return bch2_err_class(ret);
 }
 
 static void bch2_kill_sb(struct super_block *sb)
@@ -2079,22 +2079,6 @@ static int bch2_fs_parse_param(struct fs_context *fc,
 	return bch2_err_class(ret);
 }
 
-static int bch2_fs_get_tree(struct fs_context *fc)
-{
-	struct bch2_opts_parse *opts = fc->fs_private;
-	const char *dev_name = fc->source;
-	struct dentry *root;
-
-	root = bch2_mount(fc->fs_type, fc->sb_flags, dev_name, *opts);
-
-	if (IS_ERR(root))
-		return PTR_ERR(root);
-
-	fc->root = root;
-
-	return 0;
-}
-
 static int bch2_fs_reconfigure(struct fs_context *fc)
 {
 	struct super_block *sb = fc->root->d_sb;