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y2038: socket: Change recvmmsg to use __kernel_timespec

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This converts the recvmmsg() system call in all its variations to use
'timespec64' internally for its timeout, and have a __kernel_timespec64
argument in the native entry point. This lets us change the type to use
64-bit time_t at a later point while using the 32-bit compat system call
emulation for existing user space.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
2018-04-18 13:42:25 +02:00
parent 474b9c777b
commit c2e6c8567a
4 changed files with 14 additions and 16 deletions
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6
net/compat.c
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@@ -815,18 +815,18 @@ static int __compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
struct old_timespec32 __user *timeout)
{
int datagrams;
struct timespec ktspec;
struct timespec64 ktspec;
if (timeout == NULL)
return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, NULL);
if (compat_get_timespec(&ktspec, timeout))
if (compat_get_timespec64(&ktspec, timeout))
return -EFAULT;
datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, &ktspec);
if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
if (datagrams > 0 && compat_put_timespec64(&ktspec, timeout))
datagrams = -EFAULT;
return datagrams;