Contributors: 24
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Linus Torvalds (pre-git) |
474 |
46.15% |
22 |
31.43% |
| Al Viro |
160 |
15.58% |
6 |
8.57% |
| Arnd Bergmann |
108 |
10.52% |
5 |
7.14% |
| Andrew Morton |
78 |
7.59% |
4 |
5.71% |
| David S. Miller |
37 |
3.60% |
1 |
1.43% |
| Andi Kleen |
28 |
2.73% |
3 |
4.29% |
| Christoph Hellwig |
23 |
2.24% |
1 |
1.43% |
| Dominik Brodowski |
20 |
1.95% |
7 |
10.00% |
| Jeff Dike |
17 |
1.66% |
2 |
2.86% |
| Hirokazu Takata |
14 |
1.36% |
1 |
1.43% |
| Ralf Baechle |
13 |
1.27% |
2 |
2.86% |
| Will Deacon |
12 |
1.17% |
1 |
1.43% |
| David Howells |
8 |
0.78% |
1 |
1.43% |
| Linus Torvalds |
8 |
0.78% |
2 |
2.86% |
| Anton Blanchard |
5 |
0.49% |
2 |
2.86% |
| Greg Kroah-Hartman |
4 |
0.39% |
2 |
2.86% |
| Chris Metcalf |
3 |
0.29% |
1 |
1.43% |
| Jason Baron |
3 |
0.29% |
1 |
1.43% |
| Atsushi Nemoto |
3 |
0.29% |
1 |
1.43% |
| Pavel Emelyanov |
3 |
0.29% |
1 |
1.43% |
| Manfred Spraul |
2 |
0.19% |
1 |
1.43% |
| Heiko Carstens |
2 |
0.19% |
1 |
1.43% |
| Ulrich Drepper |
1 |
0.10% |
1 |
1.43% |
| Paolo Ciarrocchi |
1 |
0.10% |
1 |
1.43% |
| Total |
1027 |
|
70 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* sys_ipc() is the old de-multiplexer for the SysV IPC calls.
*
* This is really horribly ugly, and new architectures should just wire up
* the individual syscalls instead.
*/
#include <linux/unistd.h>
#include <linux/syscalls.h>
#include <linux/security.h>
#include <linux/ipc_namespace.h>
#include "util.h"
#ifdef __ARCH_WANT_SYS_IPC
#include <linux/errno.h>
#include <linux/ipc.h>
#include <linux/shm.h>
#include <linux/uaccess.h>
int ksys_ipc(unsigned int call, int first, unsigned long second,
unsigned long third, void __user * ptr, long fifth)
{
int version, ret;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
return ksys_semtimedop(first, (struct sembuf __user *)ptr,
second, NULL);
case SEMTIMEDOP:
if (IS_ENABLED(CONFIG_64BIT))
return ksys_semtimedop(first, ptr, second,
(const struct __kernel_timespec __user *)fifth);
else if (IS_ENABLED(CONFIG_COMPAT_32BIT_TIME))
return compat_ksys_semtimedop(first, ptr, second,
(const struct old_timespec32 __user *)fifth);
else
return -ENOSYS;
case SEMGET:
return ksys_semget(first, second, third);
case SEMCTL: {
unsigned long arg;
if (!ptr)
return -EINVAL;
if (get_user(arg, (unsigned long __user *) ptr))
return -EFAULT;
return ksys_old_semctl(first, second, third, arg);
}
case MSGSND:
return ksys_msgsnd(first, (struct msgbuf __user *) ptr,
second, third);
case MSGRCV:
switch (version) {
case 0: {
struct ipc_kludge tmp;
if (!ptr)
return -EINVAL;
if (copy_from_user(&tmp,
(struct ipc_kludge __user *) ptr,
sizeof(tmp)))
return -EFAULT;
return ksys_msgrcv(first, tmp.msgp, second,
tmp.msgtyp, third);
}
default:
return ksys_msgrcv(first,
(struct msgbuf __user *) ptr,
second, fifth, third);
}
case MSGGET:
return ksys_msgget((key_t) first, second);
case MSGCTL:
return ksys_old_msgctl(first, second,
(struct msqid_ds __user *)ptr);
case SHMAT:
switch (version) {
default: {
unsigned long raddr;
ret = do_shmat(first, (char __user *)ptr,
second, &raddr, SHMLBA);
if (ret)
return ret;
return put_user(raddr, (unsigned long __user *) third);
}
case 1:
/*
* This was the entry point for kernel-originating calls
* from iBCS2 in 2.2 days.
*/
return -EINVAL;
}
case SHMDT:
return ksys_shmdt((char __user *)ptr);
case SHMGET:
return ksys_shmget(first, second, third);
case SHMCTL:
return ksys_old_shmctl(first, second,
(struct shmid_ds __user *) ptr);
default:
return -ENOSYS;
}
}
SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
unsigned long, third, void __user *, ptr, long, fifth)
{
return ksys_ipc(call, first, second, third, ptr, fifth);
}
#endif
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#ifndef COMPAT_SHMLBA
#define COMPAT_SHMLBA SHMLBA
#endif
struct compat_ipc_kludge {
compat_uptr_t msgp;
compat_long_t msgtyp;
};
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
int compat_ksys_ipc(u32 call, int first, int second,
u32 third, compat_uptr_t ptr, u32 fifth)
{
int version;
u32 pad;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
/* struct sembuf is the same on 32 and 64bit :)) */
return ksys_semtimedop(first, compat_ptr(ptr), second, NULL);
case SEMTIMEDOP:
if (!IS_ENABLED(CONFIG_COMPAT_32BIT_TIME))
return -ENOSYS;
return compat_ksys_semtimedop(first, compat_ptr(ptr), second,
compat_ptr(fifth));
case SEMGET:
return ksys_semget(first, second, third);
case SEMCTL:
if (!ptr)
return -EINVAL;
if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
return -EFAULT;
return compat_ksys_old_semctl(first, second, third, pad);
case MSGSND:
return compat_ksys_msgsnd(first, ptr, second, third);
case MSGRCV: {
void __user *uptr = compat_ptr(ptr);
if (first < 0 || second < 0)
return -EINVAL;
if (!version) {
struct compat_ipc_kludge ipck;
if (!uptr)
return -EINVAL;
if (copy_from_user(&ipck, uptr, sizeof(ipck)))
return -EFAULT;
return compat_ksys_msgrcv(first, ipck.msgp, second,
ipck.msgtyp, third);
}
return compat_ksys_msgrcv(first, ptr, second, fifth, third);
}
case MSGGET:
return ksys_msgget(first, second);
case MSGCTL:
return compat_ksys_old_msgctl(first, second, compat_ptr(ptr));
case SHMAT: {
int err;
unsigned long raddr;
if (version == 1)
return -EINVAL;
err = do_shmat(first, compat_ptr(ptr), second, &raddr,
COMPAT_SHMLBA);
if (err < 0)
return err;
return put_user(raddr, (compat_ulong_t __user *)compat_ptr(third));
}
case SHMDT:
return ksys_shmdt(compat_ptr(ptr));
case SHMGET:
return ksys_shmget(first, (unsigned int)second, third);
case SHMCTL:
return compat_ksys_old_shmctl(first, second, compat_ptr(ptr));
}
return -ENOSYS;
}
COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
u32, third, compat_uptr_t, ptr, u32, fifth)
{
return compat_ksys_ipc(call, first, second, third, ptr, fifth);
}
#endif
#endif