diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/obd_cksum.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/obd_cksum.h | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/drivers/staging/lustre/lustre/include/obd_cksum.h b/drivers/staging/lustre/lustre/include/obd_cksum.h deleted file mode 100644 index e5f7bb20415d..000000000000 --- a/drivers/staging/lustre/lustre/include/obd_cksum.h +++ /dev/null @@ -1,153 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - */ - -#ifndef __OBD_CKSUM -#define __OBD_CKSUM -#include <linux/libcfs/libcfs.h> -#include <linux/libcfs/libcfs_crypto.h> -#include <uapi/linux/lustre/lustre_idl.h> - -static inline unsigned char cksum_obd2cfs(enum cksum_type cksum_type) -{ - switch (cksum_type) { - case OBD_CKSUM_CRC32: - return CFS_HASH_ALG_CRC32; - case OBD_CKSUM_ADLER: - return CFS_HASH_ALG_ADLER32; - case OBD_CKSUM_CRC32C: - return CFS_HASH_ALG_CRC32C; - default: - CERROR("Unknown checksum type (%x)!!!\n", cksum_type); - LBUG(); - } - return 0; -} - -/* The OBD_FL_CKSUM_* flags is packed into 5 bits of o_flags, since there can - * only be a single checksum type per RPC. - * - * The OBD_CHECKSUM_* type bits passed in ocd_cksum_types are a 32-bit bitmask - * since they need to represent the full range of checksum algorithms that - * both the client and server can understand. - * - * In case of an unsupported types/flags we fall back to ADLER - * because that is supported by all clients since 1.8 - * - * In case multiple algorithms are supported the best one is used. - */ -static inline u32 cksum_type_pack(enum cksum_type cksum_type) -{ - unsigned int performance = 0, tmp; - u32 flag = OBD_FL_CKSUM_ADLER; - - if (cksum_type & OBD_CKSUM_CRC32) { - tmp = cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32)); - if (tmp > performance) { - performance = tmp; - flag = OBD_FL_CKSUM_CRC32; - } - } - if (cksum_type & OBD_CKSUM_CRC32C) { - tmp = cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32C)); - if (tmp > performance) { - performance = tmp; - flag = OBD_FL_CKSUM_CRC32C; - } - } - if (cksum_type & OBD_CKSUM_ADLER) { - tmp = cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_ADLER)); - if (tmp > performance) { - performance = tmp; - flag = OBD_FL_CKSUM_ADLER; - } - } - if (unlikely(cksum_type && !(cksum_type & (OBD_CKSUM_CRC32C | - OBD_CKSUM_CRC32 | - OBD_CKSUM_ADLER)))) - CWARN("unknown cksum type %x\n", cksum_type); - - return flag; -} - -static inline enum cksum_type cksum_type_unpack(u32 o_flags) -{ - switch (o_flags & OBD_FL_CKSUM_ALL) { - case OBD_FL_CKSUM_CRC32C: - return OBD_CKSUM_CRC32C; - case OBD_FL_CKSUM_CRC32: - return OBD_CKSUM_CRC32; - default: - break; - } - - return OBD_CKSUM_ADLER; -} - -/* Return a bitmask of the checksum types supported on this system. - * 1.8 supported ADLER it is base and not depend on hw - * Client uses all available local algos - */ -static inline enum cksum_type cksum_types_supported_client(void) -{ - enum cksum_type ret = OBD_CKSUM_ADLER; - - CDEBUG(D_INFO, "Crypto hash speed: crc %d, crc32c %d, adler %d\n", - cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32)), - cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32C)), - cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_ADLER))); - - if (cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32C)) > 0) - ret |= OBD_CKSUM_CRC32C; - if (cfs_crypto_hash_speed(cksum_obd2cfs(OBD_CKSUM_CRC32)) > 0) - ret |= OBD_CKSUM_CRC32; - - return ret; -} - -/* Select the best checksum algorithm among those supplied in the cksum_types - * input. - * - * Currently, calling cksum_type_pack() with a mask will return the fastest - * checksum type due to its benchmarking at libcfs module load. - * Caution is advised, however, since what is fastest on a single client may - * not be the fastest or most efficient algorithm on the server. - */ -static inline enum cksum_type cksum_type_select(enum cksum_type cksum_types) -{ - return cksum_type_unpack(cksum_type_pack(cksum_types)); -} - -/* Checksum algorithm names. Must be defined in the same order as the - * OBD_CKSUM_* flags. - */ -#define DECLARE_CKSUM_NAME char *cksum_name[] = {"crc32", "adler", "crc32c"} - -#endif /* __OBD_H */ |