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authorDeepa Dinamani <deepa.kernel@gmail.com>2016-05-19 17:09:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-19 19:12:14 -0700
commit766b9f928bd5b9b185d986d40355d1f143484136 (patch)
tree7a594c76bd4c09f8043551d411aba4755298e5a3 /net/socket.c
parentbc2c53e5f1a2bae69ae50ce3a592633da7fcf6d9 (diff)
fs: poll/select/recvmmsg: use timespec64 for timeout events
struct timespec is not y2038 safe. Even though timespec might be sufficient to represent timeouts, use struct timespec64 here as the plan is to get rid of all timespec reference in the kernel. The patch transitions the common functions: poll_select_set_timeout() and select_estimate_accuracy() to use timespec64. And, all the syscalls that use these functions are transitioned in the same patch. The restart block parameters for poll uses monotonic time. Use timespec64 here as well to assign timeout value. This parameter in the restart block need not change because this only holds the monotonic timestamp at which timeout should occur. And, unsigned long data type should be big enough for this timestamp. The system call interfaces will be handled in a separate series. Compat interfaces need not change as timespec64 is an alias to struct timespec on a 64 bit system. Link: http://lkml.kernel.org/r/1461947989-21926-3-git-send-email-deepa.kernel@gmail.com Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: John Stultz <john.stultz@linaro.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/socket.c b/net/socket.c
index e7793f5601ae..a1bd16106625 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2168,7 +2168,8 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
struct mmsghdr __user *entry;
struct compat_mmsghdr __user *compat_entry;
struct msghdr msg_sys;
- struct timespec end_time;
+ struct timespec64 end_time;
+ struct timespec64 timeout64;
if (timeout &&
poll_select_set_timeout(&end_time, timeout->tv_sec,
@@ -2220,8 +2221,9 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
flags |= MSG_DONTWAIT;
if (timeout) {
- ktime_get_ts(timeout);
- *timeout = timespec_sub(end_time, *timeout);
+ ktime_get_ts64(&timeout64);
+ *timeout = timespec64_to_timespec(
+ timespec64_sub(end_time, timeout64));
if (timeout->tv_sec < 0) {
timeout->tv_sec = timeout->tv_nsec = 0;
break;