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compat: make linux/compat.h available everywhere

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Parts of linux/compat.h are under an #ifdef, but we end up
using more of those over time, moving things around bit by
bit.

To get it over with once and for all, make all of this file
uncondititonal now so it can be accessed everywhere. There
are only a few types left that are in asm/compat.h but not
yet in the asm-generic version, so add those in the process.

This requires providing a few more types in asm-generic/compat.h
that were not already there. The only tricky one is
compat_sigset_t, which needs a little help on 32-bit architectures
and for x86.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-07-22 16:28:58 +02:00 committed by David S. Miller
parent 4431531c48
commit 1a33b18b3b
10 changed files with 59 additions and 96 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm64/include/asm/compat.h
View File

@ -5,6 +5,9 @@
#ifndef __ASM_COMPAT_H
#define __ASM_COMPAT_H
#define compat_mode_t compat_mode_t
typedef u16 compat_mode_t;
#include <asm-generic/compat.h>
#ifdef CONFIG_COMPAT
@ -27,13 +30,9 @@ typedef u16 __compat_uid_t;
typedef u16 __compat_gid_t;
typedef u16 __compat_uid16_t;
typedef u16 __compat_gid16_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u32 compat_dev_t;
typedef s32 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
struct compat_stat {
@ -103,13 +102,6 @@ struct compat_statfs {
#define COMPAT_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t;
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))

24
arch/mips/include/asm/compat.h
View File

@ -9,20 +9,25 @@
#include <asm/page.h>
#include <asm/ptrace.h>
typedef s32 __compat_uid_t;
typedef s32 __compat_gid_t;
typedef __compat_uid_t __compat_uid32_t;
typedef __compat_gid_t __compat_gid32_t;
#define __compat_uid32_t __compat_uid32_t
#define __compat_gid32_t __compat_gid32_t
#define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#include <asm-generic/compat.h>
#define COMPAT_USER_HZ 100
#define COMPAT_UTS_MACHINE "mips\0\0\0"
typedef s32 __compat_uid_t;
typedef s32 __compat_gid_t;
typedef __compat_uid_t __compat_uid32_t;
typedef __compat_gid_t __compat_gid32_t;
typedef u32 compat_mode_t;
typedef u32 compat_dev_t;
typedef u32 compat_nlink_t;
typedef s32 compat_ipc_pid_t;
typedef s32 compat_caddr_t;
typedef struct {
s32 val[2];
} compat_fsid_t;
@ -89,13 +94,6 @@ struct compat_statfs {
#define COMPAT_RLIM_INFINITY 0x7fffffffUL
typedef u32 compat_old_sigset_t; /* at least 32 bits */
#define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
static inline void __user *arch_compat_alloc_user_space(long len)

14
arch/parisc/include/asm/compat.h
View File

@ -8,6 +8,9 @@
#include <linux/sched.h>
#include <linux/thread_info.h>
#define compat_mode_t compat_mode_t
typedef u16 compat_mode_t;
#include <asm-generic/compat.h>
#define COMPAT_USER_HZ 100
@ -15,13 +18,9 @@
typedef u32 __compat_uid_t;
typedef u32 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u32 compat_dev_t;
typedef u16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
struct compat_stat {
compat_dev_t st_dev; /* dev_t is 32 bits on parisc */
@ -96,13 +95,6 @@ struct compat_sigcontext {
#define COMPAT_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t; /* at least 32 bits */
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
struct compat_ipc64_perm {

11
arch/powerpc/include/asm/compat.h
View File

@ -19,13 +19,9 @@
typedef u32 __compat_uid_t;
typedef u32 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u32 compat_mode_t;
typedef u32 compat_dev_t;
typedef s16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
struct compat_stat {
@ -85,13 +81,6 @@ struct compat_statfs {
#define COMPAT_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t;
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
static inline void __user *arch_compat_alloc_user_space(long len)

14
arch/s390/include/asm/compat.h
View File

@ -9,6 +9,9 @@
#include <linux/sched/task_stack.h>
#include <linux/thread_info.h>
#define compat_mode_t compat_mode_t
typedef u16 compat_mode_t;
#include <asm-generic/compat.h>
#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
@ -55,13 +58,9 @@
typedef u16 __compat_uid_t;
typedef u16 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u16 compat_dev_t;
typedef u16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
typedef struct {
@ -155,13 +154,6 @@ struct compat_statfs64 {
#define COMPAT_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t; /* at least 32 bits */
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
/*

14
arch/sparc/include/asm/compat.h
View File

@ -6,6 +6,9 @@
*/
#include <linux/types.h>
#define compat_mode_t compat_mode_t
typedef u16 compat_mode_t;
#include <asm-generic/compat.h>
#define COMPAT_USER_HZ 100
@ -13,13 +16,9 @@
typedef u16 __compat_uid_t;
typedef u16 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u16 compat_dev_t;
typedef s16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
struct compat_stat {
@ -115,13 +114,6 @@ struct compat_statfs {
#define COMPAT_RLIM_INFINITY 0x7fffffff
typedef u32 compat_old_sigset_t;
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
#ifdef CONFIG_COMPAT

14
arch/x86/include/asm/compat.h
View File

@ -12,6 +12,9 @@
#include <asm/user32.h>
#include <asm/unistd.h>
#define compat_mode_t compat_mode_t
typedef u16 compat_mode_t;
#include <asm-generic/compat.h>
#define COMPAT_USER_HZ 100
@ -19,13 +22,9 @@
typedef u16 __compat_uid_t;
typedef u16 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u16 compat_dev_t;
typedef u16 compat_nlink_t;
typedef u16 compat_ipc_pid_t;
typedef u32 compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
struct compat_stat {
@ -92,13 +91,6 @@ struct compat_statfs {
#define COMPAT_RLIM_INFINITY 0xffffffff
typedef u32 compat_old_sigset_t; /* at least 32 bits */
#define _COMPAT_NSIG 64
#define _COMPAT_NSIG_BPW 32
typedef u32 compat_sigset_word;
#define COMPAT_OFF_T_MAX 0x7fffffff
struct compat_ipc64_perm {

1
arch/x86/include/asm/signal.h
View File

@ -29,6 +29,7 @@ typedef struct {
#define SA_X32_ABI 0x01000000u
#ifndef CONFIG_COMPAT
#define compat_sigset_t compat_sigset_t
typedef sigset_t compat_sigset_t;
#endif

17
include/asm-generic/compat.h
View File

@ -20,7 +20,18 @@ typedef u16 compat_ushort_t;
typedef u32 compat_uint_t;
typedef u32 compat_ulong_t;
typedef u32 compat_uptr_t;
typedef u32 compat_caddr_t;
typedef u32 compat_aio_context_t;
typedef u32 compat_old_sigset_t;
#ifndef __compat_uid32_t
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
#endif
#ifndef compat_mode_t
typedef u32 compat_mode_t;
#endif
#ifdef CONFIG_COMPAT_FOR_U64_ALIGNMENT
typedef s64 __attribute__((aligned(4))) compat_s64;
@ -30,4 +41,10 @@ typedef s64 compat_s64;
typedef u64 compat_u64;
#endif
#ifndef _COMPAT_NSIG
typedef u32 compat_sigset_word;
#define _COMPAT_NSIG _NSIG
#define _COMPAT_NSIG_BPW 32
#endif
#endif

32
include/linux/compat.h
View File

@ -20,11 +20,8 @@
#include <linux/unistd.h>
#include <asm/compat.h>
#ifdef CONFIG_COMPAT
#include <asm/siginfo.h>
#include <asm/signal.h>
#endif
#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
/*
@ -95,8 +92,6 @@ struct compat_iovec {
compat_size_t iov_len;
};
#ifdef CONFIG_COMPAT
#ifndef compat_user_stack_pointer
#define compat_user_stack_pointer() current_user_stack_pointer()
#endif
@ -131,9 +126,11 @@ struct compat_tms {
#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
#ifndef compat_sigset_t
typedef struct {
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
} compat_sigset_t;
#endif
int set_compat_user_sigmask(const compat_sigset_t __user *umask,
size_t sigsetsize);
@ -384,6 +381,7 @@ struct compat_keyctl_kdf_params {
__u32 __spare[8];
};
struct compat_stat;
struct compat_statfs;
struct compat_statfs64;
struct compat_old_linux_dirent;
@ -428,7 +426,7 @@ put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
unsigned int size)
{
/* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
#ifdef __BIG_ENDIAN
#if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
compat_sigset_t v;
switch (_NSIG_WORDS) {
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
@ -929,17 +927,6 @@ asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
/*
* For most but not all architectures, "am I in a compat syscall?" and
* "am I a compat task?" are the same question. For architectures on which
* they aren't the same question, arch code can override in_compat_syscall.
*/
#ifndef in_compat_syscall
static inline bool in_compat_syscall(void) { return is_compat_task(); }
#endif
/**
* ns_to_old_timeval32 - Compat version of ns_to_timeval
* @nsec: the nanoseconds value to be converted
@ -969,6 +956,17 @@ int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
struct compat_statfs64 __user * buf);
#ifdef CONFIG_COMPAT
/*
* For most but not all architectures, "am I in a compat syscall?" and
* "am I a compat task?" are the same question. For architectures on which
* they aren't the same question, arch code can override in_compat_syscall.
*/
#ifndef in_compat_syscall
static inline bool in_compat_syscall(void) { return is_compat_task(); }
#endif
#else /* !CONFIG_COMPAT */
#define is_compat_task() (0)