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service clone command to clone system services on demand.

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This commit is contained in:
Cristiano Giuffrida 2010-06-28 21:38:29 +00:00
parent 635a8f772c
commit 869a223d43
5 changed files with 55 additions and 3 deletions
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8
commands/service/service.c
View file

@ -41,6 +41,7 @@ PRIVATE char *known_requests[] = {
"restart",
"shutdown",
"update",
"clone",
"catch for illegal requests"
};
#define ILLEGAL_REQUEST sizeof(known_requests)/sizeof(char *)
@ -130,6 +131,7 @@ PRIVATE void print_usage(char *app_name, char *problem)
fprintf(stderr, " %s down label\n", app_name);
fprintf(stderr, " %s refresh label\n", app_name);
fprintf(stderr, " %s restart label\n", app_name);
fprintf(stderr, " %s clone label\n", app_name);
fprintf(stderr, " %s shutdown\n", app_name);
fprintf(stderr, "\n");
}
@ -351,11 +353,12 @@ PRIVATE int parse_arguments(int argc, char **argv)
}
}
}
else if (req_nr == RS_DOWN || req_nr == RS_REFRESH || req_nr == RS_RESTART) {
else if (req_nr == RS_DOWN || req_nr == RS_REFRESH || req_nr == RS_RESTART
|| req_nr == RS_CLONE) {
/* Verify argument count. */
if (argc - 1 < optind+ARG_LABEL) {
print_usage(argv[ARG_NAME], "action requires a label to stop");
print_usage(argv[ARG_NAME], "action requires a target label");
exit(EINVAL);
}
req_label= argv[optind+ARG_LABEL];
@ -1122,6 +1125,7 @@ PUBLIC int main(int argc, char **argv)
case RS_DOWN:
case RS_REFRESH:
case RS_RESTART:
case RS_CLONE:
m.RS_CMD_ADDR = req_label;
m.RS_CMD_LEN = strlen(req_label);
break;

1
include/minix/com.h
View file

@ -668,6 +668,7 @@
#define RS_RESTART (RS_RQ_BASE + 3) /* restart system service */
#define RS_SHUTDOWN (RS_RQ_BASE + 4) /* alert about shutdown */
#define RS_UPDATE (RS_RQ_BASE + 5) /* update system service */
#define RS_CLONE (RS_RQ_BASE + 6) /* clone system service */
#define RS_LOOKUP (RS_RQ_BASE + 8) /* lookup server name */

1
servers/rs/main.c
View file

@ -112,6 +112,7 @@ PUBLIC int main(void)
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 GETSYSINFO: result = do_getsysinfo(&m); break;
case RS_LOOKUP: result = do_lookup(&m); break;
/* Ready messages. */

1
servers/rs/proto.h
View file

@ -15,6 +15,7 @@ _PROTOTYPE( int do_up, (message *m));
_PROTOTYPE( int do_down, (message *m));
_PROTOTYPE( int do_refresh, (message *m));
_PROTOTYPE( int do_restart, (message *m));
_PROTOTYPE( int do_clone, (message *m));
_PROTOTYPE( int do_shutdown, (message *m));
_PROTOTYPE( void do_period, (message *m));
_PROTOTYPE( int do_init_ready, (message *m));

47
servers/rs/request.c
View file

@ -174,6 +174,51 @@ PUBLIC int do_restart(message *m_ptr)
return OK;
}
/*===========================================================================*
* do_clone *
*===========================================================================*/
PUBLIC int do_clone(message *m_ptr)
{
struct rproc *rp;
struct rprocpub *rpub;
int s, r;
char label[RS_MAX_LABEL_LEN];
char script[MAX_SCRIPT_LEN];
/* Copy label. */
s = copy_label(m_ptr->m_source, m_ptr->RS_CMD_ADDR,
m_ptr->RS_CMD_LEN, label, sizeof(label));
if(s != OK) {
return s;
}
/* Lookup slot by label. */
rp = lookup_slot_by_label(label);
if(!rp) {
if(rs_verbose)
printf("RS: do_clone: service '%s' not found\n", label);
return(ESRCH);
}
rpub = rp->r_pub;
/* Check if the call can be allowed. */
if((r = check_call_permission(m_ptr->m_source, RS_CLONE, rp)) != OK)
return r;
/* Don't clone if a replica is already available. */
if(rp->r_next_rp) {
return EEXIST;
}
/* Clone the service as requested. */
rpub->sys_flags |= SF_USE_REPL;
if ((r = clone_service(rp)) != OK) {
rpub->sys_flags &= ~SF_USE_REPL;
return r;
}
return OK;
}
/*===========================================================================*
* do_refresh *
@ -516,7 +561,7 @@ message *m_ptr;
*/
for (rp=BEG_RPROC_ADDR; rp<END_RPROC_ADDR; rp++) {
rpub = rp->r_pub;
if ((rp->r_flags & RS_IN_USE) && !(rp->r_flags & RS_UPDATING)) {
if ((rp->r_flags & RS_ACTIVE) && !(rp->r_flags & RS_UPDATING)) {
/* Compute period. */
period = rpub->period;