[PATCHv6 11/36] timerfd: Make timerfd_settime() time namespace aware
From: Dmitry Safonov <hidden>
Date: 2019-08-15 16:38:59
Also in:
lkml
Subsystem:
filesystems (vfs and infrastructure), posix clocks and timers, the rest · Maintainers:
Alexander Viro, Christian Brauner, Anna-Maria Behnsen, Frederic Weisbecker, Thomas Gleixner, Linus Torvalds
From: Andrei Vagin <redacted> timerfd_settime() accepts an absolute value of the experation time if TFD_TIMER_ABSTIME is specified. This value is in task's time namespace and has to be converted to the host's time namespace. Signed-off-by: Andrei Vagin <redacted> Co-developed-by: Dmitry Safonov <redacted> Signed-off-by: Dmitry Safonov <redacted> --- fs/timerfd.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/timerfd.c b/fs/timerfd.c
index 48305ba41e3c..f9da5752a79e 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c@@ -26,6 +26,7 @@ #include <linux/syscalls.h> #include <linux/compat.h> #include <linux/rcupdate.h> +#include <linux/time_namespace.h> struct timerfd_ctx { union {
@@ -196,6 +197,8 @@ static int timerfd_setup(struct timerfd_ctx *ctx, int flags, } if (texp != 0) { + if (flags & TFD_TIMER_ABSTIME) + texp = timens_ktime_to_host(clockid, texp); if (isalarm(ctx)) { if (flags & TFD_TIMER_ABSTIME) alarm_start(&ctx->t.alarm, texp);
--
2.22.0