// 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) || !IS_ENABLED(CONFIG_64BIT_TIME)) 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_IPCint 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
// 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) || !IS_ENABLED(CONFIG_64BIT_TIME))
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