Merge tag 'y2038-new-syscalls' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground into timers/2038

Pull y2038 - time64 system calls from Arnd Bergmann:

This series finally gets us to the point of having system calls with 64-bit
time_t on all architectures, after a long time of incremental preparation
patches.

There was actually one conversion that I missed during the summer,
i.e. Deepa's timex series, which I now updated based the 5.0-rc1 changes
and review comments.

The following system calls are now added on all 32-bit architectures using
the same system call numbers:

403 clock_gettime64
404 clock_settime64
405 clock_adjtime64
406 clock_getres_time64
407 clock_nanosleep_time64
408 timer_gettime64
409 timer_settime64
410 timerfd_gettime64
411 timerfd_settime64
412 utimensat_time64
413 pselect6_time64
414 ppoll_time64
416 io_pgetevents_time64
417 recvmmsg_time64
418 mq_timedsend_time64
419 mq_timedreceiv_time64
420 semtimedop_time64
421 rt_sigtimedwait_time64
422 futex_time64
423 sched_rr_get_interval_time64

Each one of these corresponds directly to an existing system call that
includes a 'struct timespec' argument, or a structure containing a timespec
or (in case of clock_adjtime) timeval. Not included here are new versions
of getitimer/setitimer and getrusage/waitid, which are planned for the
future but only needed to make a consistent API rather than for correct
operation beyond y2038. These four system calls are based on 'timeval', and
it has not been finally decided what the replacement kernel interface will
use instead.

So far, I have done a lot of build testing across most architectures, which
has found a number of bugs. Runtime testing so far included testing LTP on
32-bit ARM with the existing system calls, to ensure we do not regress for
existing binaries, and a test with a 32-bit x86 build of LTP against a
modified version of the musl C library that has been adapted to the new
system call interface [3].  This library can be used for testing on all
architectures supported by musl-1.1.21, but it is not how the support is
getting integrated into the official musl release. Official musl support is
planned but will require more invasive changes to the library.

Link: https://lore.kernel.org/lkml/20190110162435.309262-1-arnd@arndb.de/T/
Link: https://lore.kernel.org/lkml/20190118161835.2259170-1-arnd@arndb.de/
Link: https://git.linaro.org/people/arnd/musl-y2038.git/ [2]

1 files changed, 4 insertions, 100 deletions

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 056be0d03722..ebddcb6cfcf8 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -132,37 +132,6 @@ struct compat_tms {
 	compat_clock_t		tms_cstime;
 };
 
-struct compat_timex {
-	compat_uint_t modes;
-	compat_long_t offset;
-	compat_long_t freq;
-	compat_long_t maxerror;
-	compat_long_t esterror;
-	compat_int_t status;
-	compat_long_t constant;
-	compat_long_t precision;
-	compat_long_t tolerance;
-	struct old_timeval32 time;
-	compat_long_t tick;
-	compat_long_t ppsfreq;
-	compat_long_t jitter;
-	compat_int_t shift;
-	compat_long_t stabil;
-	compat_long_t jitcnt;
-	compat_long_t calcnt;
-	compat_long_t errcnt;
-	compat_long_t stbcnt;
-	compat_int_t tai;
-
-	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
-	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
-	compat_int_t:32; compat_int_t:32; compat_int_t:32;
-};
-
-struct timex;
-int compat_get_timex(struct timex *, const struct compat_timex __user *);
-int compat_put_timex(struct compat_timex __user *, const struct timex *);
-
 #define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 
 typedef struct {
@@ -551,11 +520,6 @@ int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 				     u32 __user *iocb);
-asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
-					compat_long_t min_nr,
-					compat_long_t nr,
-					struct io_event __user *events,
-					struct old_timespec32 __user *timeout);
 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
 					compat_long_t min_nr,
 					compat_long_t nr,
@@ -648,7 +612,7 @@ asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 				    compat_loff_t __user *offset, compat_size_t count);
 
 /* fs/select.c */
-asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
+asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
 				    compat_ulong_t __user *outp,
 				    compat_ulong_t __user *exp,
 				    struct old_timespec32 __user *tsp,
@@ -658,7 +622,7 @@ asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
 				    compat_ulong_t __user *exp,
 				    struct __kernel_timespec __user *tsp,
 				    void __user *sig);
-asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
+asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
 				 unsigned int nfds,
 				 struct old_timespec32 __user *tsp,
 				 const compat_sigset_t __user *sigmask,
@@ -688,19 +652,6 @@ asmlinkage long compat_sys_newfstat(unsigned int fd,
 
 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
 
-/* fs/timerfd.c */
-asmlinkage long compat_sys_timerfd_gettime(int ufd,
-				   struct old_itimerspec32 __user *otmr);
-asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
-				   const struct old_itimerspec32 __user *utmr,
-				   struct old_itimerspec32 __user *otmr);
-
-/* fs/utimes.c */
-asmlinkage long compat_sys_utimensat(unsigned int dfd,
-				     const char __user *filename,
-				     struct old_timespec32 __user *t,
-				     int flags);
-
 /* kernel/exit.c */
 asmlinkage long compat_sys_waitid(int, compat_pid_t,
 		struct compat_siginfo __user *, int,
@@ -709,9 +660,6 @@ asmlinkage long compat_sys_waitid(int, compat_pid_t,
 
 
 /* kernel/futex.c */
-asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
-		struct old_timespec32 __user *utime, u32 __user *uaddr2,
-		u32 val3);
 asmlinkage long
 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 			   compat_size_t len);
@@ -719,10 +667,6 @@ asmlinkage long
 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 			   compat_size_t __user *len_ptr);
 
-/* kernel/hrtimer.c */
-asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
-				     struct old_timespec32 __user *rmtp);
-
 /* kernel/itimer.c */
 asmlinkage long compat_sys_getitimer(int which,
 				     struct compat_itimerval __user *it);
@@ -740,20 +684,6 @@ asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 			struct compat_sigevent __user *timer_event_spec,
 			timer_t __user *created_timer_id);
-asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
-				 struct old_itimerspec32 __user *setting);
-asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
-					 struct old_itimerspec32 __user *new,
-					 struct old_itimerspec32 __user *old);
-asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
-					 struct old_timespec32 __user *tp);
-asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
-					 struct old_timespec32 __user *tp);
-asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
-					struct old_timespec32 __user *tp);
-asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
-					   struct old_timespec32 __user *rqtp,
-					   struct old_timespec32 __user *rmtp);
 
 /* kernel/ptrace.c */
 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
@@ -766,8 +696,6 @@ asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 				     unsigned int len,
 				     compat_ulong_t __user *user_mask_ptr);
-asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
-						 struct old_timespec32 __user *interval);
 
 /* kernel/signal.c */
 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
@@ -785,7 +713,7 @@ asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 					  compat_size_t sigsetsize);
 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 					 compat_size_t sigsetsize);
-asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
+asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
 		struct compat_siginfo __user *uinfo,
 		struct old_timespec32 __user *uts, compat_size_t sigsetsize);
 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
@@ -808,7 +736,6 @@ asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
 		struct timezone __user *tz);
 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
 		struct timezone __user *tz);
-asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 
 /* kernel/timer.c */
 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
@@ -817,14 +744,6 @@ asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 			int oflag, compat_mode_t mode,
 			struct compat_mq_attr __user *u_attr);
-asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
-			const char __user *u_msg_ptr,
-			compat_size_t msg_len, unsigned int msg_prio,
-			const struct old_timespec32 __user *u_abs_timeout);
-asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
-			char __user *u_msg_ptr,
-			compat_size_t msg_len, unsigned int __user *u_msg_prio,
-			const struct old_timespec32 __user *u_abs_timeout);
 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 			const struct compat_sigevent __user *u_notification);
 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
@@ -840,8 +759,6 @@ asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 
 /* ipc/sem.c */
 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
-asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
-		unsigned nsems, const struct old_timespec32 __user *timeout);
 
 /* ipc/shm.c */
 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
@@ -899,7 +816,7 @@ asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
 				    unsigned vlen, unsigned int flags,
 				    struct __kernel_timespec __user *timeout);
-asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
+asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
 				    unsigned vlen, unsigned int flags,
 				    struct old_timespec32 __user *timeout);
 asmlinkage long compat_sys_wait4(compat_pid_t pid,
@@ -910,8 +827,6 @@ asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 					     struct file_handle __user *handle,
 					     int flags);
-asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
-					 struct compat_timex __user *tp);
 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 				    unsigned vlen, unsigned int flags);
 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
@@ -952,8 +867,6 @@ asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
 /* __ARCH_WANT_SYSCALL_NO_AT */
 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 				umode_t mode);
-asmlinkage long compat_sys_utimes(const char __user *filename,
-				  struct old_timeval32 __user *t);
 
 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
 asmlinkage long compat_sys_signalfd(int ufd,
@@ -967,12 +880,6 @@ asmlinkage long compat_sys_newlstat(const char __user *filename,
 				    struct compat_stat __user *statbuf);
 
 /* __ARCH_WANT_SYSCALL_DEPRECATED */
-asmlinkage long compat_sys_time(old_time32_t __user *tloc);
-asmlinkage long compat_sys_utime(const char __user *filename,
-				 struct old_utimbuf32 __user *t);
-asmlinkage long compat_sys_futimesat(unsigned int dfd,
-				     const char __user *filename,
-				     struct old_timeval32 __user *t);
 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 		struct old_timeval32 __user *tvp);
@@ -1007,9 +914,6 @@ asmlinkage long compat_sys_sigaction(int sig,
                                    struct compat_old_sigaction __user *oact);
 #endif
 
-/* obsolete: kernel/time/time.c */
-asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
-
 /* obsolete: net/socket.c */
 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);