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mars/kernel/compat.h
Thomas Schoebel-Theuer 28a3a7c5fd compat: HAS_VFS_READDIR => MARS_HAS_ITERATE_DIR 
iterate_dir() should be the new default, while vfs_readdir()
is a deprecated exception.
2021-02-10 13:36:06 +01:00

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/*
* MARS Long Distance Replication Software
*
* This file is part of MARS project: http://schoebel.github.io/mars/
*
* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
* Copyright (C) 2011-2014 1&1 Internet AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _MARS_COMPAT
#define _MARS_COMPAT
#include <linux/major.h>
/* Detect 5c0ba4e0762e6dabd14a5c276652e2defec38de7
* and f2b91d8d385d2cef3a1e3b3846f2dde4a6720c43
* via 2b44c4db2e2f1765d35163a861d301038e0c8a75
*/
#ifdef PF_SUSPEND_TASK
#define MARS_HAS_ITERATE_DIR
#if !defined(f_dentry)
#define __HAS_NEW_FILLDIR_T
#endif
/* else use old vfs_readdir() */
#endif
#ifdef RENAME_NOREPLACE
#define __HAS_RENAME2
#endif
/* TRANSITIONAL compatibility to the old/new prepatch
* and the new wrappers around vfs_*().
*/
#ifdef MARS_MAJOR
/*
* Obey 819671ff849b07b9831b91de879ddc5da4b333d4 as much as possible,
* detected via 57b56ac6fecb05c3192586e4892572dd13d972de
*/
#ifdef SB_I_UNTRUSTED_MOUNTER
#define MARS_HAS_PREPATCH_V2
#else
/* old prepatch (to disappear), using deprecated sys_*() calls */
#define MARS_HAS_PREPATCH
#endif
#else
#define MARS_MAJOR (DRBD_MAJOR + 1)
#endif
#if defined(MARS_HAS_PREPATCH_V2) || defined(MARS_HAS_PREPATCH)
#include <linux/syscalls.h>
#else /* MARS_HAS_PREPATCH */
#include <linux/compiler.h>
#include <linux/time.h>
#include "lamport.h"
extern int _compat_symlink(
const char __user *oldname,
const char __user *newname,
struct lamport_time *mtime);
extern int _compat_mkdir(
const char __user *pathname,
int mode);
extern int _compat_rename(
const char __user *oldname,
const char __user *newname);
extern int _compat_unlink(
const char __user *pathname);
#endif /* MARS_HAS_PREPATCH */
/* Various compatibility checks for upstream kernels.
* This is a hell.
*/
/* For bio block layer compatibility */
#include <linux/blk_types.h>
#include <linux/bio.h>
#ifdef __bvec_iter_bvec
#define MARS_HAS_BVEC_ITER
#endif
/* Detect upstream commits
* dc3b17cc8bf21307c7e076e7c778d5db756f7871
* d03f6cdc1fc422accb734c7c07a661a0018d8631
* b1d2dc5659b41741f5a29b2ade76ffb4e5bb13d8
* via fd2d332677c687ca90c12a47d6c377c547100b56
*/
#include <linux/blkdev.h>
#ifdef BLK_QC_T_INTERNAL
#define MARS_HAS_BDI_GET
#endif
#ifdef MARS_HAS_BDI_GET
#include <linux/backing-dev.h>
#endif
/* Detect upstream commits
* 2a842acab109f40f0d7d10b38e9ca88390628996
* 4e4cbee93d56137ebff722be022cae5f70ef84fb
* & neighbour commits.
*/
#ifdef BLK_STS_OK
#define MARS_HAS_BI_STATUS
#else
/* adaptation to 4246a0b63bd8f56a1469b12eafeb875b1041a451 and 8ae126660fddbeebb9251a174e6fa45b6ad8f932 */
#ifndef bio_io_error
#define MARS_HAS_BI_ERROR
#else
#define MARS_HAS_MERGE_BVEC
#endif
#endif
/* Adapt to 74d46992e0d9dee7f1f376de0d56d31614c8a17a
*/
#ifdef bio_set_dev
#define MARS_HAS_SET_DEV
#endif
/* adapt to 4e1b2d52a80d79296a5d899d73249748dea71a53 and many others */
#ifdef bio_op
#define MARS_HAS_NEW_BIO_OP
#endif
#ifdef bio_end_sector
#define MARS_HAS_VOID_RELEASE
#endif
#ifdef __bvec_iter_bvec
#define MARS_HAS_BVEC_ITER
#endif
/* 54efd50bfd873e2dbf784e0b21a8027ba4299a3e and 8ae126660fddbeebb9251a174e6fa45b6ad8f932,
* detected via 4246a0b63bd8f56a1469b12eafeb875b1041a451
*/
#ifndef BIO_UPTODATE
#define NEED_BIO_SPLIT
#endif
/* Adapt to modification of blk_queue_split() in
* af67c31fba3b879b241536a48df703a2eee18ebf
* detected via f4560ffe8cec1361b1021d81aca6a4173f8e7c87
*/
#ifdef QUEUE_FLAG_QUIESCED
#define MARS_HAS_BIO_SPLIT2
#endif
/* adapt to 4e1b2d52a80d79296a5d899d73249748dea71a53 and many others */
#ifdef bio_op
#define MARS_HAS_NEW_BIO_OP
#endif
/* adapt to 8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335
*/
#ifdef BIO_THROTTLED
#define MARS_HAS_BIO_THROTTLED
#endif
/* IO accounting */
/* adapt to 394ffa503bc40e32d7f54a9b817264e81ce131b4
* detected via b25de9d6da49b1a8760a89672283128aa8c7
*/
#ifndef BIO_EOPNOTSUPP
#define MARS_HAS_GENERIC_BLK_ACCOUNTING
#elif defined(part_stat_lock)
#define MARS_HAS_OLD_BLK_ACCOUNTING
#endif
/* adapt to d62e26b3ffd28f16ddae85a1babd0303a1a6dfb6
* detected via e743eb1ecd5564b5ae0a4a76c1566f748a358839
*/
#ifndef QUEUE_FLAG_SYNCFULL
#define MARS_HAS_NEW_GENERIC_BLK_ACCOUNTING
#endif
/* vfs stuff */
/* Adapt to
* eb031849d52e61d24ba54e9d27553189ff328174 and siblings
* bdd1d2d3d251c65b74ac4493e08db18971c09240
* e13ec939e96b13e664bb6cee361cc976a0ee621a
* detected via e462ec50cb5fad19f6003a3d8087f4a0945dd2b1
*/
#ifdef SB_RDONLY
#define MARS_HAS_KERNEL_READ
#endif
/* Adapt to fd4a0edf2a3d781c6ae07d2810776ce22302ee1c
* detected via 76fca90e9f3abc82114d9d02d8e14e0324a18ca2
*/
#ifdef IOP_DEFAULT_READLINK
#define MARS_HAS_VFS_READLINK
#endif
/* for mm stuff, should disappear */
/* adapt to 68e21be2916b359fd8afb536c1911dc014cfd03e
* detected via dea38c74cb9205341f52b8d8ae18f61247a43ea8
*/
#ifndef CALC_LOAD
#include <linux/sched/mm.h>
#endif
/* for networking */
#include <net/sock.h>
#ifndef TCP_MAX_REORDERING
#define __HAS_IOV_ITER
#endif
/* see eeb1bd5c40edb0e2fd925c8535e2fdebdbc5cef2 */
#ifdef sk_net_refcnt
#define __HAS_STRUCT_NET
#endif
/* for crypto stuff */
#include <linux/crypto.h>
/*
* Forced by 896545098777564212b9e91af4c973f094649aa7
* Detected by 7b5a080b3c46f0cac71c0d0262634c6517d4ee4f
*/
#ifdef CRYPTO_ALG_TYPE_SHASH
#define MARS_HAS_NEW_CRYPTO
#endif
#if defined(CONFIG_CRC32C) || defined(CONFIG_CRYPTO_CRC32C) || defined(CONFIG_CRYPTO_CRC32C_MODULE)
#define HAS_CRC32C
#endif
#if defined(CONFIG_CRC32) || defined(CONFIG_CRYPTO_CRC32) || defined(CONFIG_CRYPTO_CRC32_MODULE)
#define HAS_CRC32
#endif
#if defined(CONFIG_CRYPTO_SHA1) || defined(CONFIG_CRYPTO_SHA1_MODULE)
#define HAS_SHA1
#endif
/* compression stuff */
#if (defined(CONFIG_LZO_COMPRESS) || defined(CONFIG_LZO_COMPRESS_MODULE)) && \
(defined(CONFIG_LZO_DECOMPRESS) || defined(CONFIG_LZO_DECOMPRESS_MODULE))
#include <linux/lzo.h>
#define HAS_LZO
#endif
#if (defined(CONFIG_LZ4_COMPRESS) || defined(CONFIG_LZ4_COMPRESS_MODULE)) && \
(defined(CONFIG_LZ4_DECOMPRESS) || defined(CONFIG_LZ4_DECOMPRESS_MODULE))
#include <linux/lz4.h>
#define HAS_LZ4
/* adapt to 4e1a33b105ddf201f66dcc44490c6086a25eca0b
*/
#ifdef LZ4_ACCELERATION_DEFAULT
#define HAS_FAST_LZ4
#endif
#endif
#if defined(CONFIG_ZLIB_INFLATE) && defined(CONFIG_ZLIB_DEFLATE)
#include <linux/zlib.h>
#define HAS_ZLIB
#endif
/* general compat */
/* new code prefers READ_ONCE in place of ACCESS_ONCE */
#ifndef READ_ONCE
#define READ_ONCE ACCESS_ONCE
#endif
#endif /* _MARS_COMPAT */
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