1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #define DEBUG_SUBSYSTEM S_RPC
25 #include <linux/module.h>
26 #include <linux/obd_support.h>
27 #include <linux/lustre_net.h>
29 ptl_handle_eq_t request_out_eq, reply_in_eq, reply_out_eq, bulk_source_eq,
31 static const ptl_handle_ni_t *socknal_nip = NULL, *qswnal_nip = NULL, *gmnal_nip = NULL;
34 * Free the packet when it has gone out
36 static int request_out_callback(ptl_event_t *ev)
40 LASSERT ((ev->mem_desc.options & PTL_MD_IOV) == 0); /* requests always contiguous */
42 if (ev->type != PTL_EVENT_SENT) {
43 // XXX make sure we understand all events, including ACK's
44 CERROR("Unknown event %d\n", ev->type);
53 * Free the packet when it has gone out
55 static int reply_out_callback(ptl_event_t *ev)
59 LASSERT ((ev->mem_desc.options & PTL_MD_IOV) == 0); /* replies always contiguous */
61 if (ev->type == PTL_EVENT_SENT) {
62 OBD_FREE(ev->mem_desc.start, ev->mem_desc.length);
64 // XXX make sure we understand all events, including ACK's
65 CERROR("Unknown event %d\n", ev->type);
73 * Wake up the thread waiting for the reply once it comes in.
75 static int reply_in_callback(ptl_event_t *ev)
77 struct ptlrpc_request *req = ev->mem_desc.user_ptr;
80 LASSERT ((ev->mem_desc.options & PTL_MD_IOV) == 0); /* replies always contiguous */
82 if (req->rq_xid == 0x5a5a5a5a5a5a5a5a) {
83 CERROR("Reply received for freed request! Probably a missing "
88 if (req->rq_xid != ev->match_bits) {
89 CERROR("Reply packet for wrong request\n");
93 if (ev->type == PTL_EVENT_PUT) {
94 req->rq_repmsg = ev->mem_desc.start + ev->offset;
96 wake_up(&req->rq_wait_for_rep);
98 // XXX make sure we understand all events, including ACK's
99 CERROR("Unknown event %d\n", ev->type);
106 int request_in_callback(ptl_event_t *ev)
108 struct ptlrpc_request_buffer_desc *rqbd = ev->mem_desc.user_ptr;
109 struct ptlrpc_service *service = rqbd->rqbd_service;
111 LASSERT ((ev->mem_desc.options & PTL_MD_IOV) == 0); /* requests always contiguous */
112 LASSERT (ev->type == PTL_EVENT_PUT); /* we only enable puts */
113 LASSERT (atomic_read (&service->srv_nrqbds_receiving) > 0);
114 LASSERT (atomic_read (&rqbd->rqbd_refcount) > 0);
116 if (ev->rlength != ev->mlength)
117 CERROR("Warning: Possibly truncated rpc (%d/%d)\n",
118 ev->mlength, ev->rlength);
120 if (ptl_is_valid_handle (&ev->unlinked_me))
122 /* This is the last request to be received into this
123 * request buffer. We don't bump the refcount, since the
124 * thread servicing this event is effectively taking over
125 * portals' reference.
127 LASSERT (!memcmp (&ev->unlinked_me, &rqbd->rqbd_me_h,
128 sizeof (ev->unlinked_me)));
130 if (atomic_dec_and_test (&service->srv_nrqbds_receiving)) /* we're off-air */
132 CERROR ("All request buffers busy\n");
137 atomic_inc (&rqbd->rqbd_refcount); /* +1 ref for service thread */
139 wake_up(&service->srv_waitq);
144 static int bulk_source_callback(ptl_event_t *ev)
146 struct ptlrpc_bulk_desc *desc = ev->mem_desc.user_ptr;
147 struct ptlrpc_bulk_page *bulk;
148 struct list_head *tmp;
149 struct list_head *next;
152 CDEBUG(D_NET, "got %s event %d\n",
153 (ev->type == PTL_EVENT_SENT) ? "SENT" :
154 (ev->type == PTL_EVENT_ACK) ? "ACK" : "UNEXPECTED", ev->type);
156 LASSERT (ev->type == PTL_EVENT_SENT || ev->type == PTL_EVENT_ACK);
158 LASSERT (atomic_read (&desc->bd_source_callback_count) > 0 &&
159 atomic_read (&desc->bd_source_callback_count) <= 2);
161 /* 1 fragment for each page always */
162 LASSERT (ev->mem_desc.niov == desc->bd_page_count);
164 if (atomic_dec_and_test (&desc->bd_source_callback_count)) {
165 list_for_each_safe(tmp, next, &desc->bd_page_list) {
166 bulk = list_entry(tmp, struct ptlrpc_bulk_page,
169 if (bulk->bp_cb != NULL)
172 desc->bd_flags |= PTL_BULK_FL_SENT;
173 wake_up(&desc->bd_waitq);
174 if (desc->bd_cb != NULL)
175 desc->bd_cb(desc, desc->bd_cb_data);
181 static int bulk_sink_callback(ptl_event_t *ev)
183 struct ptlrpc_bulk_desc *desc = ev->mem_desc.user_ptr;
184 struct ptlrpc_bulk_page *bulk;
185 struct list_head *tmp;
186 struct list_head *next;
187 ptl_size_t total = 0;
190 if (ev->type == PTL_EVENT_PUT) {
191 /* put with zero offset */
192 LASSERT (ev->offset == 0);
194 LASSERT ((ev->mem_desc.options & PTL_MD_IOV) != 0);
195 /* 1 fragment for each page always */
196 LASSERT (ev->mem_desc.niov == desc->bd_page_count);
198 list_for_each_safe (tmp, next, &desc->bd_page_list) {
199 bulk = list_entry(tmp, struct ptlrpc_bulk_page,
202 total += bulk->bp_buflen;
204 if (bulk->bp_cb != NULL)
208 LASSERT (ev->mem_desc.length == total);
210 desc->bd_flags |= PTL_BULK_FL_RCVD;
211 wake_up(&desc->bd_waitq);
212 if (desc->bd_cb != NULL)
213 desc->bd_cb(desc, desc->bd_cb_data);
215 CERROR("Unexpected event type!\n");
222 int ptlrpc_init_portals(void)
227 socknal_nip = inter_module_get_request("ksocknal_ni", "ksocknal");
228 qswnal_nip = inter_module_get_request("kqswnal_ni", "kqswnal");
229 gmnal_nip = inter_module_get_request("kgmnal_ni", "kgmnal");
231 /* Use the qswnal if it's there */
232 if (qswnal_nip != NULL)
234 else if (gmnal_nip != NULL)
236 else if (socknal_nip != NULL)
239 CERROR("get_ni failed: is a NAL module loaded?\n");
243 rc = PtlEQAlloc(ni, 1024, request_out_callback, &request_out_eq);
245 CERROR("PtlEQAlloc failed: %d\n", rc);
247 rc = PtlEQAlloc(ni, 1024, reply_out_callback, &reply_out_eq);
249 CERROR("PtlEQAlloc failed: %d\n", rc);
251 rc = PtlEQAlloc(ni, 1024, reply_in_callback, &reply_in_eq);
253 CERROR("PtlEQAlloc failed: %d\n", rc);
255 rc = PtlEQAlloc(ni, 1024, bulk_source_callback, &bulk_source_eq);
257 CERROR("PtlEQAlloc failed: %d\n", rc);
259 rc = PtlEQAlloc(ni, 1024, bulk_sink_callback, &bulk_sink_eq);
261 CERROR("PtlEQAlloc failed: %d\n", rc);
266 void ptlrpc_exit_portals(void)
268 PtlEQFree(request_out_eq);
269 PtlEQFree(reply_out_eq);
270 PtlEQFree(reply_in_eq);
271 PtlEQFree(bulk_source_eq);
272 PtlEQFree(bulk_sink_eq);
274 if (qswnal_nip != NULL)
275 inter_module_put("kqswnal_ni");
276 if (socknal_nip != NULL)
277 inter_module_put("ksocknal_ni");
278 if (gmnal_nip != NULL)
279 inter_module_put("kgmnal_ni");