241 lines
7.2 KiB
C
241 lines
7.2 KiB
C
#include "syslib.h"
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#include <assert.h>
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#include <minix/sysutil.h>
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#include <stdio.h>
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/* Self variables. */
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#define SEF_SELF_NAME_MAXLEN 20
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PUBLIC char sef_self_name[SEF_SELF_NAME_MAXLEN];
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PUBLIC endpoint_t sef_self_endpoint;
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/* Debug. */
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#define SEF_DEBUG_HEADER_MAXLEN 32
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PRIVATE time_t sef_debug_boottime = 0;
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PRIVATE u32_t sef_debug_system_hz = 0;
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PRIVATE time_t sef_debug_time_sec = 0;
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PRIVATE time_t sef_debug_time_us = 0;
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PRIVATE char sef_debug_header_buff[SEF_DEBUG_HEADER_MAXLEN];
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FORWARD _PROTOTYPE( void sef_debug_refresh_params, (void) );
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PUBLIC _PROTOTYPE( char* sef_debug_header, (void) );
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/* SEF Init prototypes. */
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EXTERN _PROTOTYPE( int do_sef_rs_init, (void) );
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EXTERN _PROTOTYPE( int do_sef_init_request, (message *m_ptr) );
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/* SEF Ping prototypes. */
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EXTERN _PROTOTYPE( int do_sef_ping_request, (message *m_ptr) );
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/* SEF Live update prototypes. */
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EXTERN _PROTOTYPE( void do_sef_lu_before_receive, (void) );
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EXTERN _PROTOTYPE( int do_sef_lu_request, (message *m_ptr) );
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/* SEF Signal prototypes. */
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EXTERN _PROTOTYPE( int do_sef_signal_request, (message *m_ptr) );
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/*===========================================================================*
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* sef_startup *
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*===========================================================================*/
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PUBLIC void sef_startup()
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{
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/* SEF startup interface for system services. */
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int r, status;
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/* Get information about self. */
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r = sys_whoami(&sef_self_endpoint, sef_self_name, SEF_SELF_NAME_MAXLEN);
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if ( r != OK) {
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sef_self_endpoint = SELF;
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sprintf(sef_self_name, "%s", "Unknown");
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}
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#if INTERCEPT_SEF_INIT_REQUESTS
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/* Intercept SEF Init requests. */
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if(sef_self_endpoint == RS_PROC_NR) {
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/* RS initialization is special. */
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if((r = do_sef_rs_init()) != OK) {
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panic("unable to complete init: %d", r);
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}
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}
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else {
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message m;
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/* Wait for an initialization message from RS. We need this to learn the
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* initialization type and parameters. When restarting after a crash, we
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* may get some spurious IPC messages from RS (e.g. update request) that
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* were originally meant to be delivered to the old instance. We discard
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* these messages and block till a proper initialization request arrives.
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*/
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do {
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r = receive(RS_PROC_NR, &m, &status);
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if(r != OK) {
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panic("unable to receive from RS: %d", r);
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}
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} while(!IS_SEF_INIT_REQUEST(&m));
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/* Process initialization request for this system service. */
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if((r = do_sef_init_request(&m)) != OK) {
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panic("unable to process init request: %d", r);
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}
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}
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#endif
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}
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/*===========================================================================*
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* sef_receive_status *
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*===========================================================================*/
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PUBLIC int sef_receive_status(endpoint_t src, message *m_ptr, int *status_ptr)
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{
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/* SEF receive() interface for system services. */
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int r, status;
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while(TRUE) {
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#if INTERCEPT_SEF_LU_REQUESTS
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/* Handle SEF Live update before receive events. */
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do_sef_lu_before_receive();
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#endif
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/* Receive and return in case of error. */
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r = receive(src, m_ptr, &status);
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if(status_ptr) *status_ptr = status;
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if(r != OK) {
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return r;
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}
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#if INTERCEPT_SEF_PING_REQUESTS
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/* Intercept SEF Ping requests. */
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if(IS_SEF_PING_REQUEST(m_ptr, status)) {
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if(do_sef_ping_request(m_ptr) == OK) {
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continue;
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}
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}
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#endif
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#if INTERCEPT_SEF_LU_REQUESTS
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/* Intercept SEF Live update requests. */
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if(IS_SEF_LU_REQUEST(m_ptr, status)) {
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if(do_sef_lu_request(m_ptr) == OK) {
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continue;
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}
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}
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#endif
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#if INTERCEPT_SEF_SIGNAL_REQUESTS
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/* Intercept SEF Signal requests. */
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if(IS_SEF_SIGNAL_REQUEST(m_ptr, status)) {
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if(do_sef_signal_request(m_ptr) == OK) {
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continue;
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}
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}
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#endif
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/* If we get this far, this is not a valid SEF request, return and
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* let the caller deal with that.
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*/
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break;
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}
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return r;
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}
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/*===========================================================================*
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* sef_exit *
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*===========================================================================*/
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PUBLIC void sef_exit(int status)
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{
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/* System services use a special version of exit() that generates a
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* self-termination signal.
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*/
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message m;
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/* Ask the kernel to exit. */
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sys_exit();
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/* If sys_exit() fails, this is not a system service. Exit through PM. */
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m.m1_i1 = status;
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_syscall(PM_PROC_NR, EXIT, &m);
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/* If everything else fails, hang. */
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printf("Warning: system service %d couldn't exit\n", sef_self_endpoint);
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for(;;) { }
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}
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/*===========================================================================*
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* _exit *
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*===========================================================================*/
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PUBLIC void _exit(int status)
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{
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/* Make exit() an alias for sef_exit() for system services. */
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sef_exit(status);
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}
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/*===========================================================================*
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* __exit *
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*===========================================================================*/
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PUBLIC void __exit(int status)
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{
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/* Make exit() an alias for sef_exit() for system services. */
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sef_exit(status);
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}
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/*===========================================================================*
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* sef_debug_refresh_params *
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*===========================================================================*/
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PRIVATE void sef_debug_refresh_params(void)
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{
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/* Refresh SEF debug params. */
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clock_t uptime;
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int r;
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/* Get boottime the first time. */
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if(!sef_debug_boottime) {
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r = sys_times(NONE, NULL, NULL, NULL, &sef_debug_boottime);
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if ( r != OK) {
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sef_debug_boottime = -1;
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}
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}
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/* Get system hz the first time. */
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if(!sef_debug_system_hz) {
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r = sys_getinfo(GET_HZ, &sef_debug_system_hz,
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sizeof(sef_debug_system_hz), 0, 0);
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if ( r != OK) {
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sef_debug_system_hz = -1;
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}
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}
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/* Get uptime. */
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uptime = -1;
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if(sef_debug_boottime!=-1 && sef_debug_system_hz!=-1) {
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r = sys_times(NONE, NULL, NULL, &uptime, NULL);
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if ( r != OK) {
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uptime = -1;
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}
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}
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/* Compute current time. */
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if(sef_debug_boottime==-1 || sef_debug_system_hz==-1 || uptime==-1) {
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sef_debug_time_sec = 0;
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sef_debug_time_us = 0;
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}
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else {
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sef_debug_time_sec = (time_t) (sef_debug_boottime
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+ (uptime/sef_debug_system_hz));
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sef_debug_time_us = (uptime%sef_debug_system_hz)
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* 1000000/sef_debug_system_hz;
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}
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}
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/*===========================================================================*
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* sef_debug_header *
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*===========================================================================*/
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PUBLIC char* sef_debug_header(void)
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{
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/* Build and return a SEF debug header. */
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sef_debug_refresh_params();
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sprintf(sef_debug_header_buff, "%s: time = %ds %06dus",
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sef_self_name, (int) sef_debug_time_sec, (int) sef_debug_time_us);
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return sef_debug_header_buff;
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}
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