This is a common use case when using timerfd_create to actually use
it with CLOCK_BOOTTIME on linux which is CLOCK_UPTIME for us.
Note that currently on freebsd CLOCK_BOOTTIME is CLOCK_UPTIME, but the
semantic is supposed to be different, this has to be fixed later.
Tested with the fnott notification software
Reviewed by: des, imp
Differential Revision: https://reviews.freebsd.org/D44253
(cherry picked from commit cf742faa39a58a9b43b671c66097e6880459d4ae)
(cherry picked from commit 0ecf0b26a750582b804e238e6446db55188d7fdc)
32-bit compatibility code is conventionally stored in
sys/compat/freebsd32. Move freebsd32_timerfd_gettime() and
freebsd32_timerfd_settime() from sys/kern/sys_timerfd.c to
sys/compat/freebsd32/freebsd32_misc.c.
MFC After: 3 days
Reviewed by: imp, markj
Differential Revision; https://reviews.freebsd.org/D41640
(cherry picked from commit 918966a27479b4fb7c4c8999c4926d83c2c081e5)
Define a locking regime for the members of struct timerfd and document
it so future code can follow the standard. The lock legend can be found
in a comment above struct timerfd.
Additionally,
* Add assertions based on locking regime.
* Fill kn_data with the expiration count when EVFILT_READ is triggered.
* Report st_ctim for stat(2).
* Check if file has f_type == DTYPE_TIMERFD before assigning timerfd
pointer to f_data.
MFC After: 3 days
Reviewed by: imp, kib, markj
Differential Revision: https://reviews.freebsd.org/D41600
(cherry picked from commit a1f506156c4db885d3cc177c93e9c8a28d535d30)
There was no good reason to use the former. This should prevent some
head-scratching by an interested and qualified reader.
(cherry picked from commit f4296cfb409a48de00bfa60e76f686c2b031876f)
While here dodge list locking in timerfd_adjust if empty.
(cherry picked from commit 5eab523053db79b4bd4f926c7d7ac04444d9c1da)
Approved by: re (cperciva@)
timerfd01 from ltp passes (and some other don't), but none of the tests
crash the kernel.
This is a bare minimum patch to fix up the immediate regression.
Reported by: yasu
(cherry picked from commit 02f534b57f84d6f4f97c337b05b383c8b3aaf18c)
Approved by: re (cperciva@)
Move the timerfd impelemntation from linux compat code to sys/kern. Use
it to implement the new system calls for timerfd. Add a hook to kern_tc
to allow timerfd to know when the system time has stepped. Add kqueue
support to timerfd. Adjust a few names to be less Linux centric.
RelNotes: YES
Reviewed by: markj (on irc), imp, kib (with reservations), jhb (slack)
Differential Revision: https://reviews.freebsd.org/D38459
