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| author | Andrei Vagin <avagin@gmail.com> | 2019-11-12 01:27:02 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-01-14 12:20:53 +0100 |
| commit | 6cd889d43c40b13f81a44c41896781ce70244769 (patch) | |
| tree | 74a3f0575c0f0a31eb7deaa1ec8723ed0ce9166c | |
| parent | 89dd8eecfe961fab4924dcd14f80cf2ab2820044 (diff) | |
| download | lwn-6cd889d43c40b13f81a44c41896781ce70244769.tar.gz lwn-6cd889d43c40b13f81a44c41896781ce70244769.zip | |
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
| -rw-r--r-- | fs/timerfd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/timerfd.c b/fs/timerfd.c index ac7f59a58f94..c5509d2448e3 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); |