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mars/kernel/compat.h

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infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
/*
* 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>
compat: HAS_VFS_READDIR => MARS_HAS_ITERATE_DIR iterate_dir() should be the new default, while vfs_readdir() is a deprecated exception.
2021-01-27 10:31:41 +00:00
/* Detect 5c0ba4e0762e6dabd14a5c276652e2defec38de7
* and f2b91d8d385d2cef3a1e3b3846f2dde4a6720c43
* via 2b44c4db2e2f1765d35163a861d301038e0c8a75
compat: move detection to compat.h
2021-01-25 12:53:59 +00:00
*/
compat: HAS_VFS_READDIR => MARS_HAS_ITERATE_DIR iterate_dir() should be the new default, while vfs_readdir() is a deprecated exception.
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#ifdef PF_SUSPEND_TASK
#define MARS_HAS_ITERATE_DIR
#if !defined(f_dentry)
compat: move detection to compat.h
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#define __HAS_NEW_FILLDIR_T
#endif
compat: HAS_VFS_READDIR => MARS_HAS_ITERATE_DIR iterate_dir() should be the new default, while vfs_readdir() is a deprecated exception.
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/* else use old vfs_readdir() */
#endif
compat: move detection to compat.h
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#ifdef RENAME_NOREPLACE
#define __HAS_RENAME2
#endif
compat: adapt to kernel 4.17 and new prepatch
2021-01-25 13:37:30 +00:00
/* TRANSITIONAL compatibility to the old/new prepatch
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
* and the new wrappers around vfs_*().
*/
#ifdef MARS_MAJOR
compat: adapt to kernel 4.17 and new prepatch
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/*
* 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 */
all: unify HAS_ naming conventions
2019-08-06 06:34:41 +00:00
#define MARS_HAS_PREPATCH
compat: adapt to kernel 4.17 and new prepatch
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#endif
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
#else
#define MARS_MAJOR (DRBD_MAJOR + 1)
#endif
compat: adapt to kernel 4.17 and new prepatch
2021-01-25 13:37:30 +00:00
#if defined(MARS_HAS_PREPATCH_V2) || defined(MARS_HAS_PREPATCH)
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
#include <linux/syscalls.h>
all: unify HAS_ naming conventions
2019-08-06 06:34:41 +00:00
#else /* MARS_HAS_PREPATCH */
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
infra: replace sys_symlink() by vfs_symlink()
2015-05-26 10:16:32 +00:00
#include <linux/compiler.h>
infra: remove unwanted sys_utimes()
2015-05-27 10:03:47 +00:00
#include <linux/time.h>
all: adapt to new timespec64 type
2019-02-19 09:18:29 +00:00
#include "lamport.h"
infra: replace sys_symlink() by vfs_symlink()
2015-05-26 10:16:32 +00:00
extern int _compat_symlink(
const char __user *oldname,
infra: remove unwanted sys_utimes()
2015-05-27 10:03:47 +00:00
const char __user *newname,
all: adapt to new timespec64 type
2019-02-19 09:18:29 +00:00
struct lamport_time *mtime);
infra: replace sys_symlink() by vfs_symlink()
2015-05-26 10:16:32 +00:00
infra: replace sys_mkdir() by vfs_mkdir()
2015-05-26 11:45:35 +00:00
extern int _compat_mkdir(
const char __user *pathname,
int mode);
infra: replace unwanted sys_rename() by provisionary wrapper
2015-05-27 08:01:20 +00:00
extern int _compat_rename(
const char __user *oldname,
const char __user *newname);
infra: replace unwanted sys_unlink() by provisionary wrapper
2017-05-04 08:28:43 +00:00
extern int _compat_unlink(
const char __user *pathname);
all: unify HAS_ naming conventions
2019-08-06 06:34:41 +00:00
#endif /* MARS_HAS_PREPATCH */
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
compat: prepare moving compat checks
2019-02-20 10:18:06 +00:00
/* Various compatibility checks for upstream kernels.
* This is a hell.
*/
bio: adapt to upstream bi_status
2019-08-06 07:01:08 +00:00
/* For bio block layer compatibility */
#include <linux/blk_types.h>
#include <linux/bio.h>
bio: move compat check
2019-02-20 10:19:11 +00:00
#ifdef __bvec_iter_bvec
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_BVEC_ITER
bio: move compat check
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#endif
infra: adapt to block layer changes, kernel 4.11
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/* 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
bio: adapt to upstream bi_status
2019-08-06 07:01:08 +00:00
/* Detect upstream commits
* 2a842acab109f40f0d7d10b38e9ca88390628996
* 4e4cbee93d56137ebff722be022cae5f70ef84fb
* & neighbour commits.
*/
#ifdef BLK_STS_OK
#define MARS_HAS_BI_STATUS
#else
if: move and merge compat check with bio
2019-02-20 10:32:05 +00:00
/* adaptation to 4246a0b63bd8f56a1469b12eafeb875b1041a451 and 8ae126660fddbeebb9251a174e6fa45b6ad8f932 */
bio: move compat check
2019-02-20 10:27:10 +00:00
#ifndef bio_io_error
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_BI_ERROR
if: move and merge compat check with bio
2019-02-20 10:32:05 +00:00
#else
all: new MARS_HAS naming conventions
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#define MARS_HAS_MERGE_BVEC
bio: move compat check
2019-02-20 10:27:10 +00:00
#endif
bio: adapt to upstream bi_status
2019-08-06 07:01:08 +00:00
#endif
bio: move compat check
2019-02-20 10:27:10 +00:00
bio: adapt to bio_set_dev
2019-02-20 06:29:47 +00:00
/* Adapt to 74d46992e0d9dee7f1f376de0d56d31614c8a17a
*/
#ifdef bio_set_dev
#define MARS_HAS_SET_DEV
#endif
bio: move compat check
2019-02-20 10:28:11 +00:00
/* adapt to 4e1b2d52a80d79296a5d899d73249748dea71a53 and many others */
#ifdef bio_op
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_NEW_BIO_OP
bio: move compat check
2019-02-20 10:28:11 +00:00
#endif
if: move compat check
2019-02-20 10:29:47 +00:00
#ifdef bio_end_sector
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_VOID_RELEASE
if: move compat check
2019-02-20 10:29:47 +00:00
#endif
if: move compat check
2019-02-20 10:30:21 +00:00
#ifdef __bvec_iter_bvec
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_BVEC_ITER
if: move compat check
2019-02-20 10:30:21 +00:00
#endif
if: move and split compat check
2019-02-20 10:34:53 +00:00
/* 54efd50bfd873e2dbf784e0b21a8027ba4299a3e and 8ae126660fddbeebb9251a174e6fa45b6ad8f932,
* detected via 4246a0b63bd8f56a1469b12eafeb875b1041a451
*/
#ifndef BIO_UPTODATE
#define NEED_BIO_SPLIT
#endif
if: adapt to new blk_queue_split()
2019-02-21 11:45:57 +00:00
/* Adapt to modification of blk_queue_split() in
* af67c31fba3b879b241536a48df703a2eee18ebf
* detected via f4560ffe8cec1361b1021d81aca6a4173f8e7c87
*/
#ifdef QUEUE_FLAG_QUIESCED
#define MARS_HAS_BIO_SPLIT2
#endif
if: move and split compat check
2019-02-20 10:34:53 +00:00
if: move compat check
2019-02-20 10:35:36 +00:00
/* adapt to 4e1b2d52a80d79296a5d899d73249748dea71a53 and many others */
#ifdef bio_op
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_NEW_BIO_OP
if: move compat check
2019-02-20 10:35:36 +00:00
#endif
if: adapt to BIO_THROTTLED
2019-02-21 11:27:20 +00:00
/* adapt to 8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335
compat: adapt to BIO_ flags conversion to enum
2021-01-30 09:12:34 +00:00
* obyeing 2b24e6f63ac9e817630424c6d8f008256348dfc4,
* the latter detected via 932f4a630a695212bdc7379b05f9bd0dafc5d968
if: adapt to BIO_THROTTLED
2019-02-21 11:27:20 +00:00
*/
compat: adapt to BIO_ flags conversion to enum
2021-01-30 09:12:34 +00:00
#if defined(BIO_THROTTLED) || defined(FOLL_LONGTERM)
if: adapt to BIO_THROTTLED
2019-02-21 11:27:20 +00:00
#define MARS_HAS_BIO_THROTTLED
#endif
if: adapt to new queue_lock type
2021-01-29 19:59:08 +00:00
/* adapt to 0d945c1f966b2bcb67bb12be749da0a7fb00201b
* detected via 8f4236d9008b0973a8281256ccfde6913cdec6cb
*/
#ifdef QUEUE_FLAG_BYPASS
#define MARS_HAS_OLD_QUEUE_LOCK
#endif
if: adapt to generic io accounting
2019-02-21 10:02:14 +00:00
/* 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
all: adapt to kernel_{read,write}
2019-02-21 12:54:36 +00:00
/* vfs stuff */
/* Adapt to
* eb031849d52e61d24ba54e9d27553189ff328174 and siblings
* bdd1d2d3d251c65b74ac4493e08db18971c09240
* e13ec939e96b13e664bb6cee361cc976a0ee621a
* detected via e462ec50cb5fad19f6003a3d8087f4a0945dd2b1
*/
#ifdef SB_RDONLY
#define MARS_HAS_KERNEL_READ
#endif
infra: use new vfs_readlink
2019-02-25 12:03:58 +00:00
/* Adapt to fd4a0edf2a3d781c6ae07d2810776ce22302ee1c
* detected via 76fca90e9f3abc82114d9d02d8e14e0324a18ca2
*/
#ifdef IOP_DEFAULT_READLINK
#define MARS_HAS_VFS_READLINK
#endif
infra: adapt to mm code move
2019-02-21 06:33:23 +00:00
/* for mm stuff, should disappear */
/* adapt to 68e21be2916b359fd8afb536c1911dc014cfd03e
* detected via dea38c74cb9205341f52b8d8ae18f61247a43ea8
*/
#ifndef CALC_LOAD
#include <linux/sched/mm.h>
#endif
net: move compat check
2019-02-20 10:38:07 +00:00
/* for networking */
net: move compat check
2019-02-20 10:39:28 +00:00
#include <net/sock.h>
net: move compat check
2019-02-20 10:38:07 +00:00
#ifndef TCP_MAX_REORDERING
#define __HAS_IOV_ITER
#endif
net: move compat check
2019-02-20 10:39:28 +00:00
/* see eeb1bd5c40edb0e2fd925c8535e2fdebdbc5cef2 */
#ifdef sk_net_refcnt
#define __HAS_STRUCT_NET
#endif
all: adapt to SO_SNDTIMEO_NEW
2021-01-30 08:00:38 +00:00
/* adapt to a9beb86ae6e55bd92f38453c8623de60b8e5a308
*/
#ifdef SO_SNDTIMEO_NEW
#define MARS_HAS_SO_SNDTIMEO_NEW
#endif
infra: move crypto compat check
2019-02-20 10:45:06 +00:00
/* for crypto stuff */
#include <linux/crypto.h>
infra: use new crypto interface with earlier kernels
2019-07-22 11:42:20 +00:00
/*
* Forced by 896545098777564212b9e91af4c973f094649aa7
* Detected by 7b5a080b3c46f0cac71c0d0262634c6517d4ee4f
*/
#ifdef CRYPTO_ALG_TYPE_SHASH
all: new MARS_HAS naming conventions
2019-08-06 06:53:28 +00:00
#define MARS_HAS_NEW_CRYPTO
infra: move crypto compat check
2019-02-20 10:45:06 +00:00
#endif
infra: allow crc32{,c} algorithms
2020-04-09 05:45:35 +00:00
#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
infra: allow sha1 algorithm
2019-03-26 13:22:08 +00:00
#if defined(CONFIG_CRYPTO_SHA1) || defined(CONFIG_CRYPTO_SHA1_MODULE)
#define HAS_SHA1
#endif
infra: adapt to removal of shash_desc::flags
2021-01-30 08:38:27 +00:00
/* adapt to 877b5691f27a1aec0d9b53095a323e45c30069e2
* detected via 113b7dfd827175977ea71cc4a29c1ac24acb9fce
*/
#ifdef LRU_ALL_FILE
#define MARS_HAS_SHASH_DESC_FLAGS
#endif
infra: add compression infrastructure
2019-07-25 06:55:17 +00:00
/* compression stuff */
infra: add LZO compression
2019-07-25 06:55:17 +00:00
#if (defined(CONFIG_LZO_COMPRESS) || defined(CONFIG_LZO_COMPRESS_MODULE)) && \
(defined(CONFIG_LZO_DECOMPRESS) || defined(CONFIG_LZO_DECOMPRESS_MODULE))
infra: add compression infrastructure
2019-07-25 06:55:17 +00:00
#include <linux/lzo.h>
infra: add LZO compression
2019-07-25 06:55:17 +00:00
#define HAS_LZO
#endif
infra: add compression infrastructure
2019-07-25 06:55:17 +00:00
infra: add LZ4 compression
2019-07-31 12:40:52 +00:00
#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
infra: exploit new lz4 interface
2019-08-05 12:28:05 +00:00
/* adapt to 4e1a33b105ddf201f66dcc44490c6086a25eca0b
*/
#ifdef LZ4_ACCELERATION_DEFAULT
#define HAS_FAST_LZ4
#endif
infra: add LZ4 compression
2019-07-31 12:40:52 +00:00
#endif
infra: add zlib compression
2020-03-29 16:17:48 +00:00
#if defined(CONFIG_ZLIB_INFLATE) && defined(CONFIG_ZLIB_DEFLATE)
#include <linux/zlib.h>
#define HAS_ZLIB
#endif
porting: prefer READ_ONCE in place of ACCESS_ONCE
2021-01-25 10:56:46 +00:00
/* general compat */
/* new code prefers READ_ONCE in place of ACCESS_ONCE */
#ifndef READ_ONCE
#define READ_ONCE ACCESS_ONCE
#endif
compat: old kernels without WRITE_ONCE
2021-03-13 11:28:37 +00:00
#ifndef WRITE_ONCE
/* quirk */
#define WRITE_ONCE(dst,src) ACCESS_ONCE(dst) = (src)
#endif
porting: prefer READ_ONCE in place of ACCESS_ONCE
2021-01-25 10:56:46 +00:00
infa: introduce wrapper layer for compatibiliy with multiple kernels This is needed for adaptation of the out-of-tree MARS version to multiple kernel versions. It will be much simplified after upstream merging, and/or removed/replaced by something better.
2015-08-26 07:29:55 +00:00
#endif /* _MARS_COMPAT */