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Message type for SYS_SETTIME

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Change-Id: I10c2c27c0c9749b49d70735175e530b4341440dc
This commit is contained in:
Lionel Sambuc 2014-05-22 15:31:51 +02:00
parent 9d1ed02a04
commit c59c5caceb
4 changed files with 28 additions and 22 deletions
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6
include/minix/com.h
View file

@ -338,12 +338,6 @@
# define GET_REGS 24 /* get general process registers */
# define GET_RUSAGE 25 /* get resource usage */
/* Field names for SYS_SETTIME. */
#define T_SETTIME_NOW m4_l2 /* non-zero for immediate, 0 for adjtime */
#define T_CLOCK_ID m4_l3 /* clock to adjust */
#define T_TIME_SEC m4_ll1 /* time in seconds since 1970 */
#define T_TIME_NSEC m4_l5 /* number of nano seconds */
/* Field names for SYS_TRACE, SYS_PRIVCTL, SYS_STATECTL. */
#define CTL_ENDPT m2_i1 /* process number of the caller */
#define CTL_REQUEST m2_i2 /* server control request */

11
include/minix/ipc.h
View file

@ -791,6 +791,16 @@ typedef struct {
} mess_lsys_krn_sys_stime;
_ASSERT_MSG_SIZE(mess_lsys_krn_sys_stime);
typedef struct {
time_t sec; /* time in seconds since 1970 */
long int nsec;
int now; /* non-zero for immediate, 0 for adjtime */
clockid_t clock_id;
uint8_t padding[36];
} mess_lsys_krn_sys_settime;
_ASSERT_MSG_SIZE(mess_lsys_krn_sys_settime);
typedef struct {
endpoint_t endpt;
@ -1603,6 +1613,7 @@ typedef struct {
mess_lsys_krn_sys_sdevio m_lsys_krn_sys_sdevio;
mess_lsys_krn_sys_setalarm m_lsys_krn_sys_setalarm;
mess_lsys_krn_sys_stime m_lsys_krn_sys_stime;
mess_lsys_krn_sys_settime m_lsys_krn_sys_settime;
mess_lsys_krn_sys_times m_lsys_krn_sys_times;
mess_lsys_krn_sys_umap m_lsys_krn_sys_umap;
mess_lsys_krn_sys_vdevio m_lsys_krn_sys_vdevio;

25
kernel/system/do_settime.c
View file

@ -2,10 +2,10 @@
* m_type: SYS_SETTIME
*
* The parameters for this kernel call are:
* m4_l2: T_SETTIME_NOW
* m4_l3: T_CLOCK_ID
* m4_ll1: T_TIME_SEC
* m4_l5: T_TIME_NSEC
* m_lsys_krn_sys_settime.now
* m_lsys_krn_sys_settime.clock_id
* m_lsys_krn_sys_settime.sec
* m_lsys_krn_sys_settime.nsec
*/
#include "kernel/system.h"
@ -21,31 +21,32 @@ int do_settime(struct proc * caller, message * m_ptr)
int32_t ticks;
time_t timediff, timediff_ticks;
if (m_ptr->T_CLOCK_ID != CLOCK_REALTIME) /* only realtime can change */
if (m_ptr->m_lsys_krn_sys_settime.clock_id != CLOCK_REALTIME) /* only realtime can change */
return EINVAL;
if (m_ptr->T_SETTIME_NOW == 0) { /* user just wants to adjtime() */
if (m_ptr->m_lsys_krn_sys_settime.now == 0) { /* user just wants to adjtime() */
/* convert delta value from seconds and nseconds to ticks */
ticks = (m_ptr->T_TIME_SEC * system_hz) +
(m_ptr->T_TIME_NSEC/(1000000000/system_hz));
ticks = (m_ptr->m_lsys_krn_sys_settime.sec * system_hz) +
(m_ptr->m_lsys_krn_sys_settime.nsec/(1000000000/system_hz));
set_adjtime_delta(ticks);
return(OK);
} /* else user wants to set the time */
timediff = m_ptr->T_TIME_SEC - boottime;
timediff = m_ptr->m_lsys_krn_sys_settime.sec - boottime;
timediff_ticks = timediff * system_hz;
/* prevent a negative value for realtime */
if (m_ptr->T_TIME_SEC <= boottime ||
if (m_ptr->m_lsys_krn_sys_settime.sec <= boottime ||
timediff_ticks < LONG_MIN/2 || timediff_ticks > LONG_MAX/2) {
/* boottime was likely wrong, try to correct it. */
boottime = m_ptr->T_TIME_SEC;
boottime = m_ptr->m_lsys_krn_sys_settime.sec;
set_realtime(1);
return(OK);
}
/* calculate the new value of realtime in ticks */
newclock = timediff_ticks + (m_ptr->T_TIME_NSEC/(1000000000/system_hz));
newclock = timediff_ticks +
(m_ptr->m_lsys_krn_sys_settime.nsec/(1000000000/system_hz));
set_realtime(newclock);

8
lib/libsys/sys_settime.c
View file

@ -6,10 +6,10 @@ int sys_settime(int now, clockid_t clk_id, time_t sec, long nsec)
message m;
int r;
m.T_SETTIME_NOW = now;
m.T_CLOCK_ID = clk_id;
m.T_TIME_SEC = sec;
m.T_TIME_NSEC = nsec;
m.m_lsys_krn_sys_settime.now = now;
m.m_lsys_krn_sys_settime.clock_id = clk_id;
m.m_lsys_krn_sys_settime.sec = sec;
m.m_lsys_krn_sys_settime.nsec = nsec;
r = _kernel_call(SYS_SETTIME, &m);
return r;