We want to reuse the compat_timex handling on 32-bit architectures the same way we are using the compat handling for timespec when moving to 64-bit time_t.
Move all definitions related to compat_timex out of the compat code into the normal timekeeping code, along with a rename to old_timex32, corresponding to the timespec/timeval structures, and make it controlled by CONFIG_COMPAT_32BIT_TIME, which 32-bit architectures will then select.
Signed-off-by: Arnd Bergmann arnd@arndb.de --- include/linux/compat.h | 35 ++----------------- include/linux/time32.h | 32 ++++++++++++++++- kernel/compat.c | 64 ---------------------------------- kernel/time/posix-timers.c | 14 ++------ kernel/time/time.c | 70 +++++++++++++++++++++++++++++++++++--- 5 files changed, 102 insertions(+), 113 deletions(-)
diff --git a/include/linux/compat.h b/include/linux/compat.h index 056be0d03722..657ca6abd855 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 { @@ -808,7 +777,7 @@ 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); +asmlinkage long compat_sys_adjtimex(struct old_timex32 __user *utp);
/* kernel/timer.c */ asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); @@ -911,7 +880,7 @@ 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); + struct old_timex32 __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, diff --git a/include/linux/time32.h b/include/linux/time32.h index 118b9977080c..820a22e2b98b 100644 --- a/include/linux/time32.h +++ b/include/linux/time32.h @@ -10,6 +10,7 @@ */
#include <linux/time64.h> +#include <linux/timex.h>
#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
@@ -35,13 +36,42 @@ struct old_utimbuf32 { old_time32_t modtime; };
+struct old_timex32 { + u32 modes; + s32 offset; + s32 freq; + s32 maxerror; + s32 esterror; + s32 status; + s32 constant; + s32 precision; + s32 tolerance; + struct old_timeval32 time; + s32 tick; + s32 ppsfreq; + s32 jitter; + s32 shift; + s32 stabil; + s32 jitcnt; + s32 calcnt; + s32 errcnt; + s32 stbcnt; + s32 tai; + + s32:32; s32:32; s32:32; s32:32; + s32:32; s32:32; s32:32; s32:32; + s32:32; s32:32; s32:32; +}; + extern int get_old_timespec32(struct timespec64 *, const void __user *); extern int put_old_timespec32(const struct timespec64 *, void __user *); extern int get_old_itimerspec32(struct itimerspec64 *its, const struct old_itimerspec32 __user *uits); extern int put_old_itimerspec32(const struct itimerspec64 *its, struct old_itimerspec32 __user *uits); - +struct timex; +int get_old_timex32(struct timex *, const struct old_timex32 __user *); +int put_old_timex32(struct old_timex32 __user *, const struct timex *);
#if __BITS_PER_LONG == 64
diff --git a/kernel/compat.c b/kernel/compat.c index f01affa17e22..d8a36c6ad7c9 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -20,7 +20,6 @@ #include <linux/syscalls.h> #include <linux/unistd.h> #include <linux/security.h> -#include <linux/timex.h> #include <linux/export.h> #include <linux/migrate.h> #include <linux/posix-timers.h> @@ -30,69 +29,6 @@
#include <linux/uaccess.h>
-int compat_get_timex(struct timex *txc, const struct compat_timex __user *utp) -{ - struct compat_timex tx32; - - memset(txc, 0, sizeof(struct timex)); - if (copy_from_user(&tx32, utp, sizeof(struct compat_timex))) - return -EFAULT; - - txc->modes = tx32.modes; - txc->offset = tx32.offset; - txc->freq = tx32.freq; - txc->maxerror = tx32.maxerror; - txc->esterror = tx32.esterror; - txc->status = tx32.status; - txc->constant = tx32.constant; - txc->precision = tx32.precision; - txc->tolerance = tx32.tolerance; - txc->time.tv_sec = tx32.time.tv_sec; - txc->time.tv_usec = tx32.time.tv_usec; - txc->tick = tx32.tick; - txc->ppsfreq = tx32.ppsfreq; - txc->jitter = tx32.jitter; - txc->shift = tx32.shift; - txc->stabil = tx32.stabil; - txc->jitcnt = tx32.jitcnt; - txc->calcnt = tx32.calcnt; - txc->errcnt = tx32.errcnt; - txc->stbcnt = tx32.stbcnt; - - return 0; -} - -int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc) -{ - struct compat_timex tx32; - - memset(&tx32, 0, sizeof(struct compat_timex)); - tx32.modes = txc->modes; - tx32.offset = txc->offset; - tx32.freq = txc->freq; - tx32.maxerror = txc->maxerror; - tx32.esterror = txc->esterror; - tx32.status = txc->status; - tx32.constant = txc->constant; - tx32.precision = txc->precision; - tx32.tolerance = txc->tolerance; - tx32.time.tv_sec = txc->time.tv_sec; - tx32.time.tv_usec = txc->time.tv_usec; - tx32.tick = txc->tick; - tx32.ppsfreq = txc->ppsfreq; - tx32.jitter = txc->jitter; - tx32.shift = txc->shift; - tx32.stabil = txc->stabil; - tx32.jitcnt = txc->jitcnt; - tx32.calcnt = txc->calcnt; - tx32.errcnt = txc->errcnt; - tx32.stbcnt = txc->stbcnt; - tx32.tai = txc->tai; - if (copy_to_user(utp, &tx32, sizeof(struct compat_timex))) - return -EFAULT; - return 0; -} - static int __compat_get_timeval(struct timeval *tv, const struct old_timeval32 __user *ctv) { return (!access_ok(ctv, sizeof(*ctv)) || diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 0e84bb72a3da..8955f32f2a36 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1123,12 +1123,8 @@ COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, return err; }
-#endif - -#ifdef CONFIG_COMPAT - COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, - struct compat_timex __user *, utp) + struct old_timex32 __user *, utp) { const struct k_clock *kc = clockid_to_kclock(which_clock); struct timex ktx; @@ -1139,22 +1135,18 @@ COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, if (!kc->clock_adj) return -EOPNOTSUPP;
- err = compat_get_timex(&ktx, utp); + err = get_old_timex32(&ktx, utp); if (err) return err;
err = kc->clock_adj(which_clock, &ktx);
if (err >= 0) - err = compat_put_timex(utp, &ktx); + err = put_old_timex32(utp, &ktx);
return err; }
-#endif - -#ifdef CONFIG_COMPAT_32BIT_TIME - COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, struct old_timespec32 __user *, tp) { diff --git a/kernel/time/time.c b/kernel/time/time.c index 2edb5088a70b..2d013bc2b271 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -278,20 +278,82 @@ SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; }
-#ifdef CONFIG_COMPAT +#ifdef CONFIG_COMPAT_32BIT_TIME +int get_old_timex32(struct timex *txc, const struct old_timex32 __user *utp) +{ + struct old_timex32 tx32; + + memset(txc, 0, sizeof(struct timex)); + if (copy_from_user(&tx32, utp, sizeof(struct old_timex32))) + return -EFAULT; + + txc->modes = tx32.modes; + txc->offset = tx32.offset; + txc->freq = tx32.freq; + txc->maxerror = tx32.maxerror; + txc->esterror = tx32.esterror; + txc->status = tx32.status; + txc->constant = tx32.constant; + txc->precision = tx32.precision; + txc->tolerance = tx32.tolerance; + txc->time.tv_sec = tx32.time.tv_sec; + txc->time.tv_usec = tx32.time.tv_usec; + txc->tick = tx32.tick; + txc->ppsfreq = tx32.ppsfreq; + txc->jitter = tx32.jitter; + txc->shift = tx32.shift; + txc->stabil = tx32.stabil; + txc->jitcnt = tx32.jitcnt; + txc->calcnt = tx32.calcnt; + txc->errcnt = tx32.errcnt; + txc->stbcnt = tx32.stbcnt; + + return 0; +} + +int put_old_timex32(struct old_timex32 __user *utp, const struct timex *txc) +{ + struct old_timex32 tx32; + + memset(&tx32, 0, sizeof(struct old_timex32)); + tx32.modes = txc->modes; + tx32.offset = txc->offset; + tx32.freq = txc->freq; + tx32.maxerror = txc->maxerror; + tx32.esterror = txc->esterror; + tx32.status = txc->status; + tx32.constant = txc->constant; + tx32.precision = txc->precision; + tx32.tolerance = txc->tolerance; + tx32.time.tv_sec = txc->time.tv_sec; + tx32.time.tv_usec = txc->time.tv_usec; + tx32.tick = txc->tick; + tx32.ppsfreq = txc->ppsfreq; + tx32.jitter = txc->jitter; + tx32.shift = txc->shift; + tx32.stabil = txc->stabil; + tx32.jitcnt = txc->jitcnt; + tx32.calcnt = txc->calcnt; + tx32.errcnt = txc->errcnt; + tx32.stbcnt = txc->stbcnt; + tx32.tai = txc->tai; + if (copy_to_user(utp, &tx32, sizeof(struct old_timex32))) + return -EFAULT; + return 0; +}
-COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) +COMPAT_SYSCALL_DEFINE1(adjtimex, struct old_timex32 __user *, utp) { struct timex txc; int err, ret;
- err = compat_get_timex(&txc, utp); + err = get_old_timex32(&txc, utp); if (err) return err;
ret = do_adjtimex(&txc);
- err = compat_put_timex(utp, &txc); + err = put_old_timex32(utp, &txc); if (err) return err;