static void
np_conn_destroy(Npconn *conn)
{
int n;
NP_ASSERT(conn != NULL);
NP_ASSERT(conn->refcount == 0);
/* issue 83: remove from srv->conns before destroying fidpool
*/
np_srv_remove_conn (conn->srv, conn);
if (conn->fidpool) {
if ((n = np_fidpool_destroy(conn->fidpool)) > 0) {
np_logmsg (conn->srv, "%s: connection closed with "
"%d unclunked fids",
np_conn_get_client_id (conn), n);
}
conn->fidpool = NULL;
}
if (conn->trans) {
np_trans_destroy (conn->trans);
conn->trans = NULL;
}
pthread_mutex_destroy(&conn->lock);
pthread_mutex_destroy(&conn->wlock);
pthread_cond_destroy(&conn->refcond);
free(conn);
}
void
np_conn_decref(Npconn *conn)
{
Npfcall *fc, *fc1;
pthread_mutex_lock(&conn->lock);
assert(conn->refcount > 0);
conn->refcount--;
if (conn->refcount) {
pthread_mutex_unlock(&conn->lock);
return;
}
if (conn->fidpool) {
np_fidpool_destroy(conn->fidpool);
conn->fidpool = NULL;
}
fc = conn->freerclist;
conn->freerclist = NULL;
while (fc != NULL) {
fc1 = fc->next;
free(fc);
fc = fc1;
}
pthread_mutex_unlock(&conn->lock);
pthread_mutex_destroy(&conn->lock);
free(conn);
}
Npconn*
np_conn_create(Npsrv *srv, Nptrans *trans, char *client_id)
{
Npconn *conn;
int err;
if (!(conn = malloc(sizeof(*conn)))) {
errno = ENOMEM;
return NULL;
}
pthread_mutex_init(&conn->lock, NULL);
pthread_mutex_init(&conn->wlock, NULL);
pthread_cond_init(&conn->resetcond, NULL);
conn->refcount = 0;
conn->resetting = 0;
conn->srv = srv;
conn->msize = srv->msize;
conn->shutdown = 0;
conn->reqs_in = 0;
conn->reqs_out = 0;
if (!(conn->fidpool = np_fidpool_create())) {
free (conn);
errno = ENOMEM;
return NULL;
}
snprintf(conn->client_id, sizeof(conn->client_id), "%s", client_id);
conn->authuser = P9_NONUNAME;
conn->trans = trans;
conn->aux = NULL;
np_srv_add_conn(srv, conn);
err = pthread_create(&conn->rthread, NULL, np_conn_read_proc, conn);
if (err != 0) {
np_srv_remove_conn (srv, conn);
np_fidpool_destroy(conn->fidpool);
free (conn);
errno = err;
return NULL;
}
return conn;
}
/* Clear all state associated with conn out of the srv.
* No more I/O is possible; we have disassociated the trans from the conn.
*/
static void
np_conn_reset(Npconn *conn)
{
int reqslen;
Npsrv *srv;
Npreq *preqs, **reqs;
xpthread_mutex_lock(&conn->lock);
conn->resetting = 1;
xpthread_mutex_unlock(&conn->lock);
xpthread_mutex_lock(&conn->srv->lock);
srv = conn->srv;
preqs = _get_waiting_reqs (conn);
if (_get_working_reqs (conn, &reqs, &reqslen) < 0) {
xpthread_mutex_unlock(&conn->srv->lock);
goto error;
}
xpthread_mutex_unlock(&conn->srv->lock);
_flush_waiting_reqs (preqs);
_flush_working_reqs (reqs, reqslen);
xpthread_mutex_lock(&srv->lock);
while (_count_working_reqs (conn, 1) > 0)
xpthread_cond_wait(&conn->resetcond, &srv->lock);
xpthread_mutex_unlock(&srv->lock);
xpthread_mutex_lock(&conn->lock);
if (conn->fidpool) {
np_fidpool_destroy(conn->fidpool);
conn->fidpool = NULL;
}
conn->resetting = 0;
xpthread_mutex_unlock(&conn->lock);
_free_working_reqs (reqs, reqslen);
return;
error:
return;
}
void
np_conn_decref(Npconn *conn)
{
xpthread_mutex_lock(&conn->lock);
assert(conn->refcount > 0);
conn->refcount--;
if (conn->refcount) {
xpthread_mutex_unlock(&conn->lock);
return;
}
if (conn->fidpool) {
np_fidpool_destroy(conn->fidpool);
conn->fidpool = NULL;
}
xpthread_mutex_unlock(&conn->lock);
pthread_mutex_destroy(&conn->lock);
pthread_cond_destroy(&conn->resetcond);
free(conn);
}
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);
}
