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get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2013-02-03 14:36:44 -05:00
parent 56e41d3c5a
commit 0e65a81b10
4 changed files with 73 additions and 132 deletions
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158
ipc/compat.c
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@@ -306,7 +306,7 @@ static long do_compat_semctl(int first, int second, int third, u32 pad)
return err;
}
long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
{
struct compat_msgbuf __user *msgp = dest;
size_t msgsz;
@@ -320,59 +320,16 @@ long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
return msgsz;
}
#ifndef COMPAT_SHMLBA
#define COMPAT_SHMLBA SHMLBA
#endif
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_semctl(int first, int second, int third, void __user *uptr)
{
u32 pad;
if (!uptr)
return -EINVAL;
if (get_user(pad, (u32 __user *) uptr))
return -EFAULT;
return do_compat_semctl(first, second, third, pad);
}
long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
{
struct compat_msgbuf __user *up = uptr;
long type;
if (first < 0)
return -EINVAL;
if (second < 0)
return -EINVAL;
if (get_user(type, &up->mtype))
return -EFAULT;
return do_msgsnd(first, type, up->mtext, second, third);
}
long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
int version, void __user *uptr)
{
if (first < 0)
return -EINVAL;
if (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;
uptr = compat_ptr(ipck.msgp);
msgtyp = ipck.msgtyp;
}
return do_msgrcv(first, uptr, second, msgtyp, third,
compat_do_msg_fill);
}
COMPAT_SYSCALL_DEFINE6(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;
@@ -387,21 +344,59 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
case SEMGET:
return sys_semget(first, second, third);
case SEMCTL:
return compat_sys_semctl(first, second, third, compat_ptr(ptr));
if (!ptr)
return -EINVAL;
if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
return -EFAULT;
return do_compat_semctl(first, second, third, pad);
case MSGSND:
return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
case MSGRCV:
return compat_sys_msgrcv(first, second, fifth, third,
version, compat_ptr(ptr));
case MSGSND: {
struct compat_msgbuf __user *up = compat_ptr(ptr);
compat_long_t type;
if (first < 0 || second < 0)
return -EINVAL;
if (get_user(type, &up->mtype))
return -EFAULT;
return do_msgsnd(first, type, up->mtext, 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;
uptr = compat_ptr(ipck.msgp);
fifth = ipck.msgtyp;
}
return do_msgrcv(first, uptr, second, fifth, third,
compat_do_msg_fill);
}
case MSGGET:
return sys_msgget(first, second);
case MSGCTL:
return compat_sys_msgctl(first, second, compat_ptr(ptr));
case SHMAT:
return compat_sys_shmat(first, second, third, version,
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 *)compat_ptr(third));
}
case SHMDT:
return sys_shmdt(compat_ptr(ptr));
case SHMGET:
@@ -412,29 +407,30 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
return -ENOSYS;
}
#else
long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
#endif
COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
{
return do_compat_semctl(semid, semnum, cmd, arg);
}
long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
compat_ssize_t msgsz, int msgflg)
COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
compat_ssize_t, msgsz, int, msgflg)
{
struct compat_msgbuf __user *up = compat_ptr(msgp);
compat_long_t mtype;
if (get_user(mtype, &msgp->mtype))
if (get_user(mtype, &up->mtype))
return -EFAULT;
return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg);
return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
}
long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
compat_ssize_t msgsz, long msgtyp, int msgflg)
COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
{
return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg,
compat_do_msg_fill);
return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
msgflg, compat_do_msg_fill);
}
#endif
static inline int get_compat_msqid64(struct msqid64_ds *m64,
struct compat_msqid64_ds __user *up64)
@@ -552,28 +548,7 @@ long compat_sys_msgctl(int first, int second, void __user *uptr)
return err;
}
#ifndef COMPAT_SHMLBA
#define COMPAT_SHMLBA SHMLBA
#endif
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
void __user *uptr)
{
int err;
unsigned long raddr;
compat_ulong_t __user *uaddr;
if (version == 1)
return -EINVAL;
err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA);
if (err < 0)
return err;
uaddr = compat_ptr(third);
return put_user(raddr, uaddr);
}
#else
long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
{
unsigned long ret;
long err;
@@ -584,7 +559,6 @@ long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
force_successful_syscall_return();
return (long)ret;
}
#endif
static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
struct compat_shmid64_ds __user *up64)