| Date | Mon, 13 Jan 2020 19:09:28 -0000 | From | "tip-bot2 for Andrei Vagin" <> | Subject | [tip: timers/core] timerfd: Make timerfd_settime() time namespace aware |
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The following commit has been merged into the timers/core branch of tip:
Commit-ID: 20a40308f2ce12392e2cfa662494b5079ea67bdf Gitweb: https://git.kernel.org/tip/20a40308f2ce12392e2cfa662494b5079ea67bdf Author: Andrei Vagin <avagin@gmail.com> AuthorDate: Tue, 12 Nov 2019 01:27:02 Committer: Thomas Gleixner <tglx@linutronix.de> CommitterDate: Mon, 13 Jan 2020 08:10:51 +01:00
timerfd: Make timerfd_settime() time namespace aware
timerfd_settime() accepts an absolute value of the expiration time if TFD_TIMER_ABSTIME is specified. This value is in the task's time namespace and has to be converted to the host's time namespace.
Co-developed-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-14-dima@arista.com
--- fs/timerfd.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/timerfd.c b/fs/timerfd.c index ac7f59a..c5509d2 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);
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