/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(int argc, char **argv)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
message m;
int result;
sigset_t sigset;
/* Initialize the server, then go to work. */
init_server(argc, argv);
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for incoming message, sets 'callnr' and 'who'. */
get_work(&m);
switch (callnr) {
case PROC_EVENT:
sig_handler();
continue;
case DS_PUBLISH:
result = do_publish(&m);
break;
case DS_RETRIEVE:
result = do_retrieve(&m);
break;
case DS_SUBSCRIBE:
result = do_subscribe(&m);
break;
case GETSYSINFO:
result = do_getsysinfo(&m);
break;
default:
report("DS","warning, got illegal request from:", m.m_source);
result = EINVAL;
}
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
m.m_type = result; /* build reply message */
reply(who_e, &m); /* send it away */
}
}
return(OK); /* shouldn't come here */
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(int argc, char **argv)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
message m;
int result;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for incoming message, sets 'callnr' and 'who'. */
get_work(&m);
if (is_notify(callnr)) {
printf("DS: warning, got illegal notify from: %d\n", m.m_source);
result = EINVAL;
goto send_reply;
}
switch (callnr) {
case DS_PUBLISH:
result = do_publish(&m);
break;
case DS_RETRIEVE:
result = do_retrieve(&m);
break;
case DS_RETRIEVE_LABEL:
result = do_retrieve_label(&m);
break;
case DS_DELETE:
result = do_delete(&m);
break;
case DS_SUBSCRIBE:
result = do_subscribe(&m);
break;
case DS_CHECK:
result = do_check(&m);
break;
case DS_SNAPSHOT:
result = do_snapshot(&m);
break;
case GETSYSINFO:
result = do_getsysinfo(&m);
break;
default:
printf("DS: warning, got illegal request from %d\n", m.m_source);
result = EINVAL;
}
send_reply:
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
m.m_type = result; /* build reply message */
reply(who_e, &m); /* send it away */
}
}
return(OK); /* shouldn't come here */
}
/*===========================================================================*
* do_work *
*===========================================================================*/
static void *do_work(void *arg)
{
int error;
struct job my_job;
my_job = *((struct job *) arg);
fp = my_job.j_fp;
lock_proc(fp, 0); /* This proc is busy */
if (job_call_nr == MAPDRIVER) {
error = do_mapdriver();
} else if (job_call_nr == COMMON_GETSYSINFO) {
error = do_getsysinfo();
} else if (IS_PFS_VFS_RQ(job_call_nr)) {
if (who_e != PFS_PROC_NR) {
printf("VFS: only PFS is allowed to make nested VFS calls\n");
error = ENOSYS;
} else if (job_call_nr <= PFS_BASE ||
job_call_nr >= PFS_BASE + PFS_NREQS) {
error = ENOSYS;
} else {
job_call_nr -= PFS_BASE;
error = (*pfs_call_vec[job_call_nr])();
}
} else {
/* We're dealing with a POSIX system call from a normal
* process. Call the internal function that does the work.
*/
if (job_call_nr < 0 || job_call_nr >= NCALLS) {
error = ENOSYS;
} else if (fp->fp_pid == PID_FREE) {
/* Process vanished before we were able to handle request.
* Replying has no use. Just drop it. */
error = SUSPEND;
} else {
#if ENABLE_SYSCALL_STATS
calls_stats[job_call_nr]++;
#endif
error = (*call_vec[job_call_nr])();
}
}
/* Copy the results back to the user and send reply. */
if (error != SUSPEND) {
if ((fp->fp_flags & FP_SYS_PROC)) {
struct vmnt *vmp;
if ((vmp = find_vmnt(fp->fp_endpoint)) != NULL)
vmp->m_flags &= ~VMNT_CALLBACK;
}
if (deadlock_resolving) {
if (fp->fp_wtid == dl_worker.w_tid)
deadlock_resolving = 0;
}
reply(fp->fp_endpoint, error);
}
thread_cleanup(fp);
return(NULL);
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(void)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
message m; /* request message */
int ipc_status; /* status code */
int call_nr, who_e,who_p; /* call number and caller */
int result; /* result to return */
int s;
/* SEF local startup. */
sef_local_startup();
if (OK != (s=sys_getmachine(&machine)))
panic("couldn't get machine info: %d", s);
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for request message. */
get_work(&m, &ipc_status);
who_e = m.m_source;
if(rs_isokendpt(who_e, &who_p) != OK) {
panic("message from bogus source: %d", who_e);
}
call_nr = m.m_type;
/* Now determine what to do. Four types of requests are expected:
* - Heartbeat messages (notifications from registered system services)
* - System notifications (synchronous alarm)
* - User requests (control messages to manage system services)
* - Ready messages (reply messages from registered services)
*/
/* Notification messages are control messages and do not need a reply.
* These include heartbeat messages and system notifications.
*/
if (is_ipc_notify(ipc_status)) {
switch (who_p) {
case CLOCK:
do_period(&m); /* check services status */
continue;
default: /* heartbeat notification */
if (rproc_ptr[who_p] != NULL) { /* mark heartbeat time */
rproc_ptr[who_p]->r_alive_tm = m.NOTIFY_TIMESTAMP;
} else {
printf("RS: warning: got unexpected notify message from %d\n",
m.m_source);
}
}
}
/* If we get this far, this is a normal request.
* Handle the request and send a reply to the caller.
*/
else {
if (call_nr != COMMON_GETSYSINFO &&
(call_nr < RS_RQ_BASE || call_nr >= RS_RQ_BASE+0x100))
{
/* Ignore invalid requests. Do not try to reply. */
printf("RS: warning: got invalid request %d from endpoint %d\n",
call_nr, m.m_source);
continue;
}
/* Handler functions are responsible for permission checking. */
switch(call_nr) {
/* User requests. */
case RS_UP: result = do_up(&m); break;
case RS_DOWN: result = do_down(&m); break;
case RS_REFRESH: result = do_refresh(&m); break;
case RS_RESTART: result = do_restart(&m); break;
case RS_SHUTDOWN: result = do_shutdown(&m); break;
case RS_UPDATE: result = do_update(&m); break;
case RS_CLONE: result = do_clone(&m); break;
case RS_EDIT: result = do_edit(&m); break;
case COMMON_GETSYSINFO:
result = do_getsysinfo(&m); break;
case RS_LOOKUP: result = do_lookup(&m); break;
/* Ready messages. */
case RS_INIT: result = do_init_ready(&m); break;
case RS_LU_PREPARE: result = do_upd_ready(&m); break;
default:
printf("RS: warning: got unexpected request %d from %d\n",
m.m_type, m.m_source);
result = EINVAL;
}
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
m.m_type = result;
reply(who_e, NULL, &m);
}
}
}
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(void)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
message m; /* request message */
int call_nr, who_e,who_p; /* call number and caller */
int result; /* result to return */
sigset_t sigset; /* system signal set */
int s;
/* Initialize the server, then go to work. */
init_server();
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for request message. */
get_work(&m);
who_e = m.m_source;
who_p = _ENDPOINT_P(who_e);
if(who_p < -NR_TASKS || who_p >= NR_PROCS)
panic("RS","message from bogus source", who_e);
call_nr = m.m_type;
/* Now determine what to do. Three types of requests are expected:
* - Heartbeat messages (notifications from registered system services)
* - System notifications (POSIX signals or synchronous alarm)
* - User requests (control messages to manage system services)
*/
/* Notification messages are control messages and do not need a reply.
* These include heartbeat messages and system notifications.
*/
if (m.m_type & NOTIFY_MESSAGE) {
switch (call_nr) {
case SYN_ALARM:
do_period(&m); /* check drivers status */
continue;
case PROC_EVENT:
sig_handler();
continue;
default: /* heartbeat notification */
if (rproc_ptr[who_p] != NULL) /* mark heartbeat time */
rproc_ptr[who_p]->r_alive_tm = m.NOTIFY_TIMESTAMP;
}
}
/* If this is not a notification message, it is a normal request.
* Handle the request and send a reply to the caller.
*/
else {
switch(call_nr) {
case RS_UP: result = do_up(&m); break;
case RS_DOWN: result = do_down(&m); break;
case RS_REFRESH: result = do_refresh(&m); break;
case RS_RESCUE: result = do_rescue(&m); break;
case RS_SHUTDOWN: result = do_shutdown(&m); break;
case GETSYSINFO: result = do_getsysinfo(&m); break;
default:
printf("Warning, RS got unexpected request %d from %d\n",
m.m_type, m.m_source);
result = EINVAL;
}
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
reply(who_e, result);
}
}
}
}
/*===========================================================================*
* main *
*===========================================================================*/
int main()
{
/* Main routine of the process manager. */
int result;
/* SEF local startup. */
sef_local_startup();
// Initialization of the semarray (of pointers) to NULL
register struct mproc *rmp;
// rmp is the pointer to the struct of the process table
for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++)
{
for(int i=0; i<12; i++) // for all 12 semaphores
{
rmp->semarray[i]=NULL;
}
}
// end of Initialization
/* This is PM's main loop- get work and do it, forever and forever. */
while (TRUE) {
int ipc_status;
/* Wait for the next message and extract useful information from it. */
if (sef_receive_status(ANY, &m_in, &ipc_status) != OK)
panic("PM sef_receive_status error");
who_e = m_in.m_source; /* who sent the message */
if(pm_isokendpt(who_e, &who_p) != OK)
panic("PM got message from invalid endpoint: %d", who_e);
call_nr = m_in.m_type; /* system call number */
/* Process slot of caller. Misuse PM's own process slot if the kernel is
* calling. This can happen in case of synchronous alarms (CLOCK) or or
* event like pending kernel signals (SYSTEM).
*/
mp = &mproc[who_p < 0 ? PM_PROC_NR : who_p];
if(who_p >= 0 && mp->mp_endpoint != who_e) {
panic("PM endpoint number out of sync with source: %d",
mp->mp_endpoint);
}
/* Drop delayed calls from exiting processes. */
if (mp->mp_flags & EXITING)
continue;
/* Check for system notifications first. Special cases. */
if (is_ipc_notify(ipc_status)) {
if (who_p == CLOCK) {
expire_timers(m_in.NOTIFY_TIMESTAMP);
}
/* done, send reply and continue */
sendreply();
continue;
}
switch(call_nr)
{
case PM_SETUID_REPLY:
case PM_SETGID_REPLY:
case PM_SETSID_REPLY:
case PM_EXEC_REPLY:
case PM_EXIT_REPLY:
case PM_CORE_REPLY:
case PM_FORK_REPLY:
case PM_SRV_FORK_REPLY:
case PM_UNPAUSE_REPLY:
case PM_REBOOT_REPLY:
case PM_SETGROUPS_REPLY:
if (who_e == VFS_PROC_NR)
{
handle_vfs_reply();
result= SUSPEND; /* don't reply */
}
else
result= ENOSYS;
break;
case COMMON_GETSYSINFO:
result = do_getsysinfo();
break;
default:
/* Else, if the system call number is valid, perform the
* call.
*/
if ((unsigned) call_nr >= NCALLS) {
result = ENOSYS;
} else {
#if ENABLE_SYSCALL_STATS
calls_stats[call_nr]++;
#endif
result = (*call_vec[call_nr])();
}
break;
}
/* Send reply. */
if (result != SUSPEND) setreply(who_p, result);
sendreply();
}
return(OK);
}