add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/ubifs/compress.c
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@@ -1,21 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * This file is part of UBIFS.
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  *
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  * Copyright (C) 2006-2008 Nokia Corporation.
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  * Copyright (C) 2006, 2007 University of Szeged, Hungary
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published by
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- * the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
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- * You should have received a copy of the GNU General Public License along with
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- * this program; if not, write to the Free Software Foundation, Inc., 51
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- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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  *
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  * Authors: Adrian Hunter
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  *          Artem Bityutskiy (Битюцкий Артём)
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@@ -68,6 +56,24 @@
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 static struct ubifs_compressor zlib_compr = {
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 	.compr_type = UBIFS_COMPR_ZLIB,
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 	.name = "zlib",
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+};
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+#endif
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+
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+#ifdef CONFIG_UBIFS_FS_ZSTD
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+static DEFINE_MUTEX(zstd_enc_mutex);
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+static DEFINE_MUTEX(zstd_dec_mutex);
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+
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+static struct ubifs_compressor zstd_compr = {
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+	.compr_type = UBIFS_COMPR_ZSTD,
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+	.comp_mutex = &zstd_enc_mutex,
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+	.decomp_mutex = &zstd_dec_mutex,
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+	.name = "zstd",
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+	.capi_name = "zstd",
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+};
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+#else
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+static struct ubifs_compressor zstd_compr = {
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+	.compr_type = UBIFS_COMPR_ZSTD,
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+	.name = "zstd",
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 };
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 #endif
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@@ -228,13 +234,19 @@
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 	if (err)
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 		return err;
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-	err = compr_init(&zlib_compr);
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+	err = compr_init(&zstd_compr);
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 	if (err)
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 		goto out_lzo;
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+
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+	err = compr_init(&zlib_compr);
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+	if (err)
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+		goto out_zstd;
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 	ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
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 	return 0;
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+out_zstd:
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+	compr_exit(&zstd_compr);
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 out_lzo:
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 	compr_exit(&lzo_compr);
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 	return err;
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@@ -247,4 +259,5 @@
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 {
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 	compr_exit(&lzo_compr);
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 	compr_exit(&zlib_compr);
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+	compr_exit(&zstd_compr);
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 }