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fs: remove compat_sys_mount

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compat_sys_mount is identical to the regular sys_mount now, so remove it
and use the native version everywhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2020-09-17 10:22:34 +02:00 committed by Al Viro
parent 67e306c690
commit 028abd9222
17 changed files with 14 additions and 81 deletions
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2
arch/arm64/include/asm/unistd32.h
View File

@ -53,7 +53,7 @@ __SYSCALL(__NR_lseek, compat_sys_lseek)
#define __NR_getpid 20
__SYSCALL(__NR_getpid, sys_getpid)
#define __NR_mount 21
__SYSCALL(__NR_mount, compat_sys_mount)
__SYSCALL(__NR_mount, sys_mount)
/* 22 was sys_umount */
__SYSCALL(22, sys_ni_syscall)
#define __NR_setuid 23

2
arch/mips/kernel/syscalls/syscall_n32.tbl
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@ -167,7 +167,7 @@
157 n32 sync sys_sync
158 n32 acct sys_acct
159 n32 settimeofday compat_sys_settimeofday
160 n32 mount compat_sys_mount
160 n32 mount sys_mount
161 n32 umount2 sys_umount
162 n32 swapon sys_swapon
163 n32 swapoff sys_swapoff

2
arch/mips/kernel/syscalls/syscall_o32.tbl
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@ -29,7 +29,7 @@
18 o32 unused18 sys_ni_syscall
19 o32 lseek sys_lseek
20 o32 getpid sys_getpid
21 o32 mount sys_mount compat_sys_mount
21 o32 mount sys_mount
22 o32 umount sys_oldumount
23 o32 setuid sys_setuid
24 o32 getuid sys_getuid

2
arch/parisc/kernel/syscalls/syscall.tbl
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@ -29,7 +29,7 @@
18 common stat sys_newstat compat_sys_newstat
19 common lseek sys_lseek compat_sys_lseek
20 common getpid sys_getpid
21 common mount sys_mount compat_sys_mount
21 common mount sys_mount
22 common bind sys_bind
23 common setuid sys_setuid
24 common getuid sys_getuid

2
arch/powerpc/kernel/syscalls/syscall.tbl
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@ -34,7 +34,7 @@
18 spu oldstat sys_ni_syscall
19 common lseek sys_lseek compat_sys_lseek
20 common getpid sys_getpid
21 nospu mount sys_mount compat_sys_mount
21 nospu mount sys_mount
22 32 umount sys_oldumount
22 64 umount sys_ni_syscall
22 spu umount sys_ni_syscall

2
arch/s390/kernel/syscalls/syscall.tbl
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@ -26,7 +26,7 @@
16 32 lchown - sys_lchown16
19 common lseek sys_lseek compat_sys_lseek
20 common getpid sys_getpid sys_getpid
21 common mount sys_mount compat_sys_mount
21 common mount sys_mount sys_mount
22 common umount sys_oldumount sys_oldumount
23 32 setuid - sys_setuid16
24 32 getuid - sys_getuid16

2
arch/sparc/kernel/syscalls/syscall.tbl
View File

@ -201,7 +201,7 @@
164 64 utrap_install sys_utrap_install
165 common quotactl sys_quotactl
166 common set_tid_address sys_set_tid_address
167 common mount sys_mount compat_sys_mount
167 common mount sys_mount
168 common ustat sys_ustat compat_sys_ustat
169 common setxattr sys_setxattr
170 common lsetxattr sys_lsetxattr

2
arch/x86/entry/syscalls/syscall_32.tbl
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@ -32,7 +32,7 @@
18 i386 oldstat sys_stat
19 i386 lseek sys_lseek compat_sys_lseek
20 i386 getpid sys_getpid
21 i386 mount sys_mount compat_sys_mount
21 i386 mount sys_mount
22 i386 umount sys_oldumount
23 i386 setuid sys_setuid16
24 i386 getuid sys_getuid16

1
fs/Makefile
View File

@ -37,7 +37,6 @@ obj-$(CONFIG_FS_DAX) += dax.o
obj-$(CONFIG_FS_ENCRYPTION) += crypto/
obj-$(CONFIG_FS_VERITY) += verity/
obj-$(CONFIG_FILE_LOCKING) += locks.o
obj-$(CONFIG_COMPAT) += compat.o
obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
obj-$(CONFIG_BINFMT_EM86) += binfmt_em86.o
obj-$(CONFIG_BINFMT_MISC) += binfmt_misc.o

57
fs/compat.c
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@ -1,57 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/fs/compat.c
*
* Kernel compatibililty routines for e.g. 32 bit syscall support
* on 64 bit kernels.
*
* Copyright (C) 2002 Stephen Rothwell, IBM Corporation
* Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz)
*/
#include <linux/compat.h>
#include <linux/nfs4_mount.h>
#include <linux/syscalls.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "internal.h"
COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name,
const char __user *, dir_name,
const char __user *, type, compat_ulong_t, flags,
const void __user *, data)
{
char *kernel_type;
void *options;
char *kernel_dev;
int retval;
kernel_type = copy_mount_string(type);
retval = PTR_ERR(kernel_type);
if (IS_ERR(kernel_type))
goto out;
kernel_dev = copy_mount_string(dev_name);
retval = PTR_ERR(kernel_dev);
if (IS_ERR(kernel_dev))
goto out1;
options = copy_mount_options(data);
retval = PTR_ERR(options);
if (IS_ERR(options))
goto out2;
retval = do_mount(kernel_dev, dir_name, kernel_type, flags, options);
out3:
kfree(options);
out2:
kfree(kernel_dev);
out1:
kfree(kernel_type);
out:
return retval;
}

3
fs/internal.h
View File

@ -82,9 +82,6 @@ int may_linkat(struct path *link);
/*
* namespace.c
*/
extern void *copy_mount_options(const void __user *);
extern char *copy_mount_string(const void __user *);
extern struct vfsmount *lookup_mnt(const struct path *);
extern int finish_automount(struct vfsmount *, struct path *);

4
fs/namespace.c
View File

@ -3072,7 +3072,7 @@ static void shrink_submounts(struct mount *mnt)
}
}
void *copy_mount_options(const void __user * data)
static void *copy_mount_options(const void __user * data)
{
char *copy;
unsigned size;
@ -3097,7 +3097,7 @@ void *copy_mount_options(const void __user * data)
return copy;
}
char *copy_mount_string(const void __user *data)
static char *copy_mount_string(const void __user *data)
{
return data ? strndup_user(data, PATH_MAX) : NULL;
}

6
include/linux/compat.h
View File

@ -522,12 +522,6 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
compat_ulong_t arg);
/* fs/namespace.c */
asmlinkage long compat_sys_mount(const char __user *dev_name,
const char __user *dir_name,
const char __user *type, compat_ulong_t flags,
const void __user *data);
/* fs/open.c */
asmlinkage long compat_sys_statfs(const char __user *pathname,
struct compat_statfs __user *buf);

2
include/uapi/asm-generic/unistd.h
View File

@ -140,7 +140,7 @@ __SYSCALL(__NR_renameat, sys_renameat)
#define __NR_umount2 39
__SYSCALL(__NR_umount2, sys_umount)
#define __NR_mount 40
__SC_COMP(__NR_mount, sys_mount, compat_sys_mount)
__SYSCALL(__NR_mount, sys_mount)
#define __NR_pivot_root 41
__SYSCALL(__NR_pivot_root, sys_pivot_root)

2
tools/include/uapi/asm-generic/unistd.h
View File

@ -140,7 +140,7 @@ __SYSCALL(__NR_renameat, sys_renameat)
#define __NR_umount2 39
__SYSCALL(__NR_umount2, sys_umount)
#define __NR_mount 40
__SC_COMP(__NR_mount, sys_mount, compat_sys_mount)
__SYSCALL(__NR_mount, sys_mount)
#define __NR_pivot_root 41
__SYSCALL(__NR_pivot_root, sys_pivot_root)

2
tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
View File

@ -32,7 +32,7 @@
18 spu oldstat sys_ni_syscall
19 common lseek sys_lseek compat_sys_lseek
20 common getpid sys_getpid
21 nospu mount sys_mount compat_sys_mount
21 nospu mount sys_mount
22 32 umount sys_oldumount
22 64 umount sys_ni_syscall
22 spu umount sys_ni_syscall

2
tools/perf/arch/s390/entry/syscalls/syscall.tbl
View File

@ -26,7 +26,7 @@
16 32 lchown - compat_sys_s390_lchown16
19 common lseek sys_lseek compat_sys_lseek
20 common getpid sys_getpid sys_getpid
21 common mount sys_mount compat_sys_mount
21 common mount sys_mount
22 common umount sys_oldumount compat_sys_oldumount
23 32 setuid - compat_sys_s390_setuid16
24 32 getuid - compat_sys_s390_getuid16