static void
np_respond(Nptpool *tp, Npreq *req, Npfcall *rc)
{
Npreq *freq;
xpthread_mutex_lock(&req->lock);
if (req->responded) {
free(rc);
xpthread_mutex_unlock(&req->lock);
np_req_unref(req);
return;
}
req->responded = 1;
xpthread_mutex_unlock(&req->lock);
xpthread_mutex_lock(&tp->lock);
np_srv_remove_workreq(tp, req);
for(freq = req->flushreq; freq != NULL; freq = freq->flushreq)
np_srv_remove_workreq(tp, freq);
xpthread_mutex_unlock(&tp->lock);
xpthread_mutex_lock(&req->lock);
req->rcall = rc;
if (req->rcall) {
np_set_tag(req->rcall, req->tag);
if (req->fid != NULL) {
np_fid_decref(req->fid);
req->fid = NULL;
}
np_conn_respond(req);
}
for(freq = req->flushreq; freq != NULL; freq = freq->flushreq) {
xpthread_mutex_lock(&freq->lock);
freq->rcall = np_create_rflush();
np_set_tag(freq->rcall, freq->tag);
np_conn_respond(freq);
xpthread_mutex_unlock(&freq->lock);
np_req_unref(freq);
}
xpthread_mutex_unlock(&req->lock);
np_req_unref(req);
}
static void
_flush_waiting_reqs (Npreq *reqs)
{
Npreq *req = reqs;
Npreq *req1;
while (req != NULL) {
req1 = req->next;
np_conn_respond(req);
np_req_unref(req);
req = req1;
}
}
static void
np_respond(Nptpool *tp, Npreq *req, Npfcall *rc)
{
xpthread_mutex_lock(&tp->srv->lock);
np_srv_remove_workreq(tp, req);
xpthread_mutex_unlock(&tp->srv->lock);
xpthread_mutex_lock(&req->lock);
req->rcall = rc;
if (req->rcall) {
np_set_tag(req->rcall, req->tag);
if (req->fid != NULL) {
np_fid_decref(req->fid);
req->fid = NULL;
}
np_conn_respond(req);
}
xpthread_mutex_unlock(&req->lock);
np_req_unref(req);
}
void
np_conn_reset(Npconn *conn, u32 msize, int dotu)
{
int i, n;
Npsrv *srv;
Npreq *req, *req1, *preqs, **reqs;
Npfcall *fc, *fc1;
pthread_mutex_lock(&conn->lock);
conn->resetting = 1;
pthread_mutex_unlock(&conn->lock);
pthread_mutex_lock(&conn->srv->lock);
srv = conn->srv;
// first flush all outstanding requests
preqs = NULL;
req = srv->reqs_first;
while (req != NULL) {
req1 = req->next;
if (req->conn == conn) {
np_srv_remove_req(srv, req);
req->next = preqs;
preqs = req;
}
req = req1;
}
// then flush all working requests
n = 0;
req = conn->srv->workreqs;
while (req != NULL) {
if (req->conn == conn && (msize==0 || req->tcall->type != Tversion))
n++;
req = req->next;
}
reqs = malloc(n * sizeof(Npreq *));
n = 0;
req = conn->srv->workreqs;
while (req != NULL) {
if (req->conn == conn && (msize==0 || req->tcall->type != Tversion))
reqs[n++] = np_req_ref(req);
req = req->next;
}
pthread_mutex_unlock(&conn->srv->lock);
req = preqs;
while (req != NULL) {
req1 = req->next;
np_conn_respond(req);
np_req_unref(req);
req = req1;
}
for(i = 0; i < n; i++) {
req = reqs[i];
if (req->conn->srv->flush)
(*req->conn->srv->flush)(req);
}
/* wait until all working requests finish */
/*
pthread_mutex_lock(&conn->lock);
while (1) {
for(i = 0; i < n; i++)
if (!reqs[i]->responded)
break;
if (i >= n)
break;
pthread_cond_wait(&conn->resetcond, &conn->lock);
}
*/
pthread_mutex_lock(&srv->lock);
while (1) {
for(req = srv->workreqs; req != NULL; req = req->next)
if (req->conn == conn && (msize==0 || req->tcall->type != Tversion))
break;
if (req == NULL)
break;
while(conn->resetting)
pthread_cond_wait(&conn->resetcond, &srv->lock);
}
pthread_mutex_unlock(&srv->lock);
/* free old pool of fcalls */
fc = conn->freerclist;
conn->freerclist = NULL;
while (fc != NULL) {
fc1 = fc->next;
free(fc);
fc = fc1;
}
if (conn->fidpool) {
np_fidpool_destroy(conn->fidpool);
conn->fidpool = NULL;
}
if (msize) {
conn->dotu = dotu;
conn->resetting = 0;
conn->fidpool = np_fidpool_create();
pthread_cond_broadcast(&conn->resetdonecond);
}
conn->resetting = 0;
pthread_mutex_unlock(&conn->lock);
/* free the working requests */
for(i = 0; i < n; i++)
np_req_unref(reqs[i]);
free(reqs);
}
Npfcall*
np_flush(Npreq *req, Npfcall *tc)
{
u16 oldtag = tc->u.tflush.oldtag;
Npreq *creq = NULL;
Npconn *conn = req->conn;
Npfcall *ret = NULL;
Nptpool *tp;
xpthread_mutex_lock(&conn->srv->lock);
// check pending requests
for (tp = conn->srv->tpool; tp != NULL; tp = tp->next) {
xpthread_mutex_lock(&tp->lock);
for(creq = tp->reqs_first; creq != NULL; creq = creq->next) {
if (creq->conn==conn && creq->tag==oldtag) {
np_srv_remove_req(tp, creq);
xpthread_mutex_lock(&creq->lock);
np_conn_respond(creq); /* doesn't send anything */
xpthread_mutex_unlock(&creq->lock);
np_req_unref(creq);
ret = np_create_rflush();
creq = NULL;
xpthread_mutex_unlock(&tp->lock);
goto done;
}
}
xpthread_mutex_unlock(&tp->lock);
}
// check working requests
for (tp = conn->srv->tpool; tp != NULL; tp = tp->next) {
xpthread_mutex_lock(&tp->lock);
creq = tp->workreqs;
while (creq != NULL) {
if (creq->conn==conn && creq->tag==oldtag) {
np_req_ref(creq);
xpthread_mutex_lock(&creq->lock);
req->flushreq = creq->flushreq;
creq->flushreq = req;
xpthread_mutex_unlock(&creq->lock);
xpthread_mutex_unlock(&tp->lock);
goto done;
}
creq = creq->next;
}
xpthread_mutex_unlock(&tp->lock);
}
// if not found, return P9_RFLUSH
if (!creq)
ret = np_create_rflush();
done:
xpthread_mutex_unlock(&conn->srv->lock);
// if working request found, try to flush it
if (creq && req->conn->srv->flush) {
(*req->conn->srv->flush)(creq);
np_req_unref(creq);
}
return ret;
}
