/* Per-connection read thread.
*/
static void *
np_conn_read_proc(void *a)
{
Npconn *conn = (Npconn *)a;
Npsrv *srv = conn->srv;
Npreq *req;
Npfcall *fc;
pthread_detach(pthread_self());
for (;;) {
if (np_trans_recv(conn->trans, &fc, conn->msize) < 0) {
np_logerr (srv, "recv error - "
"dropping connection to '%s'",
conn->client_id);
break;
}
if (!fc) /* EOF */
break;
_debug_trace (srv, fc);
/* Encapsulate fc in a request and hand to srv worker threads.
* In np_req_alloc, req->fid is looked up/initialized.
*/
req = np_req_alloc(conn, fc);
if (!req) {
np_logmsg (srv, "out of memory in receive path - "
"dropping connection to '%s'",
conn->client_id);
free (fc);
break;
}
/* Enqueue request for processing by next available worker
* thread, except P9_TFLUSH which is handled immediately.
*/
if (fc->type == P9_TFLUSH) {
if (np_flush (req, fc)) {
np_req_respond_flush (req);
np_req_unref(req);
}
xpthread_mutex_lock (&srv->lock);
srv->tpool->stats.nreqs[P9_TFLUSH]++;
xpthread_mutex_unlock (&srv->lock);
} else {
xpthread_mutex_lock(&srv->lock);
np_srv_add_req(srv, req);
xpthread_mutex_unlock(&srv->lock);
}
}
/* Just got EOF on read, or some other fatal error for the
* connection like out of memory.
*/
np_conn_flush (conn);
xpthread_mutex_lock(&conn->lock);
while (conn->refcount > 0)
xpthread_cond_wait(&conn->refcond, &conn->lock);
xpthread_mutex_unlock(&conn->lock);
np_conn_destroy(conn);
return NULL;
}
static Npfcall*
np_process_request(Npreq *req, Npstats *stats)
{
Npfcall *rc = NULL;
Npfcall *tc = req->tcall;
int ecode, valid_op = 1;
u64 rbytes = 0, wbytes = 0;
np_uerror(0);
switch (tc->type) {
case P9_TSTATFS:
rc = np_statfs(req, tc);
break;
case P9_TLOPEN:
rc = np_lopen(req, tc);
break;
case P9_TLCREATE:
rc = np_lcreate(req, tc);
break;
case P9_TSYMLINK:
rc = np_symlink(req, tc);
break;
case P9_TMKNOD:
rc = np_mknod(req, tc);
break;
case P9_TRENAME:
rc = np_rename(req, tc);
break;
case P9_TREADLINK:
rc = np_readlink(req, tc);
break;
case P9_TGETATTR:
rc = np_getattr(req, tc);
break;
case P9_TSETATTR:
rc = np_setattr(req, tc);
break;
case P9_TXATTRWALK:
rc = np_xattrwalk(req, tc);
break;
case P9_TXATTRCREATE:
rc = np_xattrcreate(req, tc);
break;
case P9_TREADDIR:
rc = np_readdir(req, tc);
break;
case P9_TFSYNC:
rc = np_fsync(req, tc);
break;
case P9_TLOCK:
rc = np_lock(req, tc);
break;
case P9_TGETLOCK:
rc = np_getlock(req, tc);
break;
case P9_TLINK:
rc = np_link(req, tc);
break;
case P9_TMKDIR:
rc = np_mkdir(req, tc);
break;
case P9_TVERSION:
rc = np_version(req, tc);
break;
case P9_TAUTH:
rc = np_auth(req, tc);
break;
case P9_TATTACH:
rc = np_attach(req, tc);
break;
case P9_TFLUSH:
rc = np_flush(req, tc);
break;
case P9_TWALK:
rc = np_walk(req, tc);
break;
case P9_TREAD:
rc = np_read(req, tc);
rbytes = rc->u.rread.count;
break;
case P9_TWRITE:
rc = np_write(req, tc);
wbytes = rc->u.rwrite.count;
break;
case P9_TCLUNK:
rc = np_clunk(req, tc);
break;
case P9_TREMOVE:
rc = np_remove(req, tc);
break;
default: /* N.B. shouldn't get here - unhandled ops are
* caught in np_deserialize ().
*/
np_uerror(ENOSYS);
valid_op = 0;
break;
}
if ((ecode = np_rerror())) {
if (rc)
free(rc);
rc = np_create_rlerror(ecode);
}
if (valid_op) {
xpthread_mutex_lock (&stats->lock);
stats->rbytes += rbytes;
stats->wbytes += wbytes;
stats->nreqs[tc->type]++;
xpthread_mutex_unlock (&stats->lock);
}
return rc;
}