/* delete a console */
void
vntsd_delete_cons(vntsd_t *vntsdp)
{
vntsd_group_t *groupp;
vntsd_cons_t *consp;
for (; ; ) {
/* get the group contains deleted console */
(void) mutex_lock(&vntsdp->lock);
groupp = vntsd_que_walk(vntsdp->grouppq,
(el_func_t)find_clean_cons_group);
if (groupp == NULL) {
/* no more group has console deleted */
(void) mutex_unlock(&vntsdp->lock);
return;
}
groupp->status &= ~VNTSD_GROUP_CLEAN_CONS;
(void) mutex_unlock(&vntsdp->lock);
for (; ; ) {
/* get the console to be deleted */
(void) mutex_lock(&groupp->lock);
assert(groupp->conspq);
consp = vntsd_que_walk(groupp->conspq,
(el_func_t)find_clean_cons);
if (consp == NULL) {
/* no more cons to delete */
(void) mutex_unlock(&groupp->lock);
break;
}
/* remove console from the group */
(void) vntsd_que_rm(&groupp->conspq, consp);
groupp->num_cons--;
(void) mutex_unlock(&groupp->lock);
/* clean up the console */
cleanup_cons(consp);
/* delete group? */
if (groupp->num_cons == 0) {
/* no more console delete it */
assert(groupp->vntsd);
(void) mutex_lock(&groupp->vntsd->lock);
(void) vntsd_que_rm(&groupp->vntsd->grouppq,
groupp);
(void) mutex_unlock(&groupp->vntsd->lock);
/* clean up the group */
vntsd_clean_group(groupp);
break;
}
}
}
}
/*
* all clients connected to a console must disconnect before
* removing a console.
*/
static void
cleanup_cons(vntsd_cons_t *consp)
{
vntsd_group_t *groupp;
timestruc_t to;
assert(consp);
D1(stderr, "t@%d vntsd_disconn_clients@%d\n", thr_self(),
consp->cons_no);
groupp = consp->group;
assert(groupp);
(void) mutex_lock(&consp->lock);
/* wait for all clients disconnect from the console */
while (consp->clientpq != NULL) {
consp->status |= VNTSD_CONS_SIG_WAIT;
/* signal client to disconnect the console */
(void) vntsd_que_walk(consp->clientpq,
(el_func_t)vntsd_notify_client_cons_del);
(void) thr_kill(consp->wr_tid, SIGUSR1);
to.tv_sec = VNTSD_CV_WAIT_DELTIME;
to.tv_nsec = 0;
/* wait for clients to disconnect */
(void) cond_reltimedwait(&consp->cvp, &consp->lock, &to);
}
(void) mutex_unlock(&consp->lock);
free_cons(consp);
}
/* initial console configuration */
void
vntsd_get_config(vntsd_t *vntsdp)
{
int i;
int num_cons;
vcc_console_t *consp;
vntsd_group_t *groupp;
/* num of consoles */
num_cons = 0;
if (vntsd_vcc_ioctl(VCC_NUM_CONSOLE, 0, (void *)&num_cons) !=
VNTSD_SUCCESS) {
vntsd_log(VNTSD_ERR_VCC_IOCTL, "VCC_NUM_CONSOLE failed\n");
return;
}
D3(stderr, "get_config:num_cons=%d", num_cons);
if (num_cons == 0) {
return;
}
/* allocate memory for all consoles */
consp = malloc(num_cons*sizeof (vcc_console_t));
if (consp == NULL) {
vntsd_log(VNTSD_ERR_NO_MEM, "for console table.");
return;
}
/* get console table */
if (vntsd_vcc_ioctl(VCC_CONS_TBL, 0, (void *)consp) != VNTSD_SUCCESS) {
vntsd_log(VNTSD_ERR_VCC_IOCTL, " VCC_CONS_TBL "
"for console table\n");
return;
}
/* intialize groups and consoles */
for (i = 0; i < num_cons; i++) {
if (alloc_cons_with_group(vntsdp, &consp[i], &groupp)
!= VNTSD_SUCCESS) {
vntsd_log(VNTSD_ERR_ADD_CONS_FAILED, "get_config");
}
}
/* create listen thread for each group */
(void) mutex_lock(&vntsdp->lock);
for (; ; ) {
groupp = vntsd_que_walk(vntsdp->grouppq,
(el_func_t)create_listen_thread);
if (groupp == NULL) {
break;
}
vntsd_log(VNTSD_ERR_CREATE_LISTEN_THR, "get config()");
}
(void) mutex_unlock(&vntsdp->lock);
}
/* clean up a group */
void
vntsd_clean_group(vntsd_group_t *groupp)
{
timestruc_t to;
D1(stderr, "t@%d clean_group() group=%s tcp=%lld\n", thr_self(),
groupp->group_name, groupp->tcp_port);
(void) mutex_lock(&groupp->lock);
/* prevent from reentry */
if (groupp->status & VNTSD_GROUP_CLEANUP) {
(void) mutex_unlock(&groupp->lock);
return;
}
groupp->status |= VNTSD_GROUP_CLEANUP;
vntsd_free_que(&groupp->conspq, (clean_func_t)cleanup_cons);
(void) mutex_unlock(&groupp->lock);
/* walk through no cons client queue */
while (groupp->no_cons_clientpq != NULL) {
groupp->status |= VNTSD_GROUP_SIG_WAIT;
(void) vntsd_que_walk(groupp->no_cons_clientpq,
(el_func_t)vntsd_notify_client_cons_del);
to.tv_sec = VNTSD_CV_WAIT_DELTIME;
to.tv_nsec = 0;
(void) cond_reltimedwait(&groupp->cvp, &groupp->lock, &to);
}
if (groupp->listen_tid == thr_self()) {
/* listen thread is exiting */
(void) mutex_lock(&(groupp->vntsd->lock));
(void) vntsd_que_rm(&groupp->vntsd->grouppq, groupp);
(void) mutex_unlock(&groupp->vntsd->lock);
(void) cond_destroy(&groupp->cvp);
(void) mutex_unlock(&groupp->lock);
(void) mutex_destroy(&groupp->lock);
free(groupp);
return;
}
/* signal listen thread to exit */
groupp->status |= VNTSD_GROUP_SIG_WAIT;
while (groupp->status & VNTSD_GROUP_SIG_WAIT) {
(void) thr_kill(groupp->listen_tid, SIGUSR1);
to.tv_sec = VNTSD_CV_WAIT_DELTIME;
to.tv_nsec = 0;
/* wait listen thread to exit */
(void) cond_reltimedwait(&groupp->cvp, &groupp->lock, &to);
}
(void) mutex_unlock(&groupp->lock);
(void) thr_join(groupp->listen_tid, NULL, NULL);
/* free group */
(void) cond_destroy(&groupp->cvp);
(void) mutex_destroy(&groupp->lock);
free(groupp);
}
/*
* check the state of listen thread. exit if there is an fatal error
* or the group is removed. Main thread will call free_group
* to close group socket and free group structure.
*/
static void
listen_chk_status(vntsd_group_t *groupp, int status)
{
char err_msg[VNTSD_LINE_LEN];
D1(stderr, "t@%d listen_chk_status() status=%d group=%s "
"tcp=%lld group status = %x\n", thr_self(), status,
groupp->group_name, groupp->tcp_port, groupp->status);
(void) snprintf(err_msg, sizeof (err_msg),
"Group:%s TCP port %lld status %x",
groupp->group_name, groupp->tcp_port, groupp->status);
switch (status) {
case VNTSD_SUCCESS:
return;
case VNTSD_STATUS_ACCEPT_ERR:
return;
case VNTSD_STATUS_INTR:
assert(groupp->status & VNTSD_GROUP_SIG_WAIT);
/*FALLTHRU*/
case VNTSD_STATUS_NO_CONS:
default:
/* fatal error or no console in the group, remove the group. */
(void) mutex_lock(&groupp->lock);
if (groupp->status & VNTSD_GROUP_SIG_WAIT) {
/*
* group is already being deleted, notify main
* thread and exit.
*/
groupp->status &= ~VNTSD_GROUP_SIG_WAIT;
(void) cond_signal(&groupp->cvp);
(void) mutex_unlock(&groupp->lock);
thr_exit(0);
}
/*
* if there still is console(s) in the group,
* the console(s) could not be connected any more because of
* a fatal error. Therefore, mark the console and notify
* main thread to delete console and group.
*/
(void) vntsd_que_walk(groupp->conspq,
(el_func_t)vntsd_mark_deleted_cons);
groupp->status |= VNTSD_GROUP_CLEAN_CONS;
/* signal main thread to delete the group */
(void) thr_kill(groupp->vntsd->tid, SIGUSR1);
(void) mutex_unlock(&groupp->lock);
/* log error */
if (status != VNTSD_STATUS_NO_CONS)
vntsd_log(status, err_msg);
thr_exit(0);
}
}
