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authorArnd Bergmann <arnd@arndb.de>2018-04-13 13:58:23 +0200
committerArnd Bergmann <arnd@arndb.de>2018-04-20 16:20:27 +0200
commitb0d175781ab275576429fe379ba8e98e1c60f362 (patch)
tree020364fd1357d4217927141098c57c908dcabe7c /ipc/mqueue.c
parent21fc538d817ce671f1a28a03996c715247c2ac89 (diff)
downloadlinux-b0d175781ab275576429fe379ba8e98e1c60f362.tar.bz2
y2038: ipc: Enable COMPAT_32BIT_TIME
Three ipc syscalls (mq_timedsend, mq_timedreceive and and semtimedop) take a timespec argument. After we move 32-bit architectures over to useing 64-bit time_t based syscalls, we need seperate entry points for the old 32-bit based interfaces. This changes the #ifdef guards for the existing 32-bit compat syscalls to check for CONFIG_COMPAT_32BIT_TIME instead, which will then be enabled on all existing 32-bit architectures. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'ipc/mqueue.c')
-rw-r--r--ipc/mqueue.c80
1 files changed, 41 insertions, 39 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 9610afcfa2e5..c0d58f390c3b 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1420,6 +1420,47 @@ COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name,
return do_mq_open(u_name, oflag, mode, p);
}
+COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
+ const struct compat_sigevent __user *, u_notification)
+{
+ struct sigevent n, *p = NULL;
+ if (u_notification) {
+ if (get_compat_sigevent(&n, u_notification))
+ return -EFAULT;
+ if (n.sigev_notify == SIGEV_THREAD)
+ n.sigev_value.sival_ptr = compat_ptr(n.sigev_value.sival_int);
+ p = &n;
+ }
+ return do_mq_notify(mqdes, p);
+}
+
+COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
+ const struct compat_mq_attr __user *, u_mqstat,
+ struct compat_mq_attr __user *, u_omqstat)
+{
+ int ret;
+ struct mq_attr mqstat, omqstat;
+ struct mq_attr *new = NULL, *old = NULL;
+
+ if (u_mqstat) {
+ new = &mqstat;
+ if (get_compat_mq_attr(new, u_mqstat))
+ return -EFAULT;
+ }
+ if (u_omqstat)
+ old = &omqstat;
+
+ ret = do_mq_getsetattr(mqdes, new, old);
+ if (ret || !old)
+ return ret;
+
+ if (put_compat_mq_attr(old, u_omqstat))
+ return -EFAULT;
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
static int compat_prepare_timeout(const struct compat_timespec __user *p,
struct timespec64 *ts)
{
@@ -1459,45 +1500,6 @@ COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes,
}
return do_mq_timedreceive(mqdes, u_msg_ptr, msg_len, u_msg_prio, p);
}
-
-COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
- const struct compat_sigevent __user *, u_notification)
-{
- struct sigevent n, *p = NULL;
- if (u_notification) {
- if (get_compat_sigevent(&n, u_notification))
- return -EFAULT;
- if (n.sigev_notify == SIGEV_THREAD)
- n.sigev_value.sival_ptr = compat_ptr(n.sigev_value.sival_int);
- p = &n;
- }
- return do_mq_notify(mqdes, p);
-}
-
-COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
- const struct compat_mq_attr __user *, u_mqstat,
- struct compat_mq_attr __user *, u_omqstat)
-{
- int ret;
- struct mq_attr mqstat, omqstat;
- struct mq_attr *new = NULL, *old = NULL;
-
- if (u_mqstat) {
- new = &mqstat;
- if (get_compat_mq_attr(new, u_mqstat))
- return -EFAULT;
- }
- if (u_omqstat)
- old = &omqstat;
-
- ret = do_mq_getsetattr(mqdes, new, old);
- if (ret || !old)
- return ret;
-
- if (put_compat_mq_attr(old, u_omqstat))
- return -EFAULT;
- return 0;
-}
#endif
static const struct inode_operations mqueue_dir_inode_operations = {