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author | Arnd Bergmann <arnd@arndb.de> | 2018-04-18 13:42:25 +0200 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2018-08-29 15:42:24 +0200 |
commit | c2e6c8567acdba8db1055b242c34ceb123c6a253 (patch) | |
tree | c68fc623710d64f681bcd1b90965f69a757e64ba | |
parent | y2038: sched: Change sched_rr_get_interval to use __kernel_timespec (diff) | |
download | linux-c2e6c8567acdba8db1055b242c34ceb123c6a253.tar.xz linux-c2e6c8567acdba8db1055b242c34ceb123c6a253.zip |
y2038: socket: Change recvmmsg to use __kernel_timespec
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>
-rw-r--r-- | include/linux/socket.h | 4 | ||||
-rw-r--r-- | include/linux/syscalls.h | 2 | ||||
-rw-r--r-- | net/compat.c | 6 | ||||
-rw-r--r-- | net/socket.c | 18 |
4 files changed, 14 insertions, 16 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 7ed4713d5337..8b571e9b9f76 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -348,7 +348,7 @@ struct ucred { extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); -struct timespec; +struct timespec64; /* The __sys_...msg variants allow MSG_CMSG_COMPAT iff * forbid_cmsg_compat==false @@ -358,7 +358,7 @@ extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat); extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, - unsigned int flags, struct timespec *timeout); + unsigned int flags, struct timespec64 *timeout); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, bool forbid_cmsg_compat); diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 5642016a312d..fb3a05fab8aa 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -830,7 +830,7 @@ asmlinkage long sys_perf_event_open( asmlinkage long sys_accept4(int, struct sockaddr __user *, int __user *, int); asmlinkage long sys_recvmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags, - struct timespec __user *timeout); + struct __kernel_timespec __user *timeout); asmlinkage long sys_wait4(pid_t pid, int __user *stat_addr, int options, struct rusage __user *ru); diff --git a/net/compat.c b/net/compat.c index 2ef160876bc1..47a614b370cd 100644 --- a/net/compat.c +++ b/net/compat.c @@ -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; diff --git a/net/socket.c b/net/socket.c index e6945e318f02..b9d71b503720 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2340,7 +2340,7 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, */ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, - unsigned int flags, struct timespec *timeout) + unsigned int flags, struct timespec64 *timeout) { int fput_needed, err, datagrams; struct socket *sock; @@ -2405,8 +2405,7 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, if (timeout) { ktime_get_ts64(&timeout64); - *timeout = timespec64_to_timespec( - timespec64_sub(end_time, timeout64)); + *timeout = timespec64_sub(end_time, timeout64); if (timeout->tv_sec < 0) { timeout->tv_sec = timeout->tv_nsec = 0; break; @@ -2452,10 +2451,10 @@ out_put: static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, - struct timespec __user *timeout) + struct __kernel_timespec __user *timeout) { int datagrams; - struct timespec timeout_sys; + struct timespec64 timeout_sys; if (flags & MSG_CMSG_COMPAT) return -EINVAL; @@ -2463,13 +2462,12 @@ static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, if (!timeout) return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); - if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) + if (get_timespec64(&timeout_sys, timeout)) return -EFAULT; datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); - if (datagrams > 0 && - copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) + if (datagrams > 0 && put_timespec64(&timeout_sys, timeout)) datagrams = -EFAULT; return datagrams; @@ -2477,7 +2475,7 @@ static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, - struct timespec __user *, timeout) + struct __kernel_timespec __user *, timeout) { return do_sys_recvmmsg(fd, mmsg, vlen, flags, timeout); } @@ -2601,7 +2599,7 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) break; case SYS_RECVMMSG: err = do_sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], - a[3], (struct timespec __user *)a[4]); + a[3], (struct __kernel_timespec __user *)a[4]); break; case SYS_ACCEPT4: err = __sys_accept4(a0, (struct sockaddr __user *)a1, |