blob: 144d2f129fcdf7f8a18b1fb8440ef6a597412fda [file] [log] [blame]
Moni Shoua8700e3e2016-06-16 16:45:23 +03001/*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include <linux/skbuff.h>
35
36#include "rxe.h"
37#include "rxe_loc.h"
38
39static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
40 struct rxe_qp *qp)
41{
42 if (unlikely(!qp->valid))
43 goto err1;
44
45 switch (qp_type(qp)) {
46 case IB_QPT_RC:
47 if (unlikely((pkt->opcode & IB_OPCODE_RC) != 0)) {
48 pr_warn_ratelimited("bad qp type\n");
49 goto err1;
50 }
51 break;
52 case IB_QPT_UC:
53 if (unlikely(!(pkt->opcode & IB_OPCODE_UC))) {
54 pr_warn_ratelimited("bad qp type\n");
55 goto err1;
56 }
57 break;
58 case IB_QPT_UD:
59 case IB_QPT_SMI:
60 case IB_QPT_GSI:
61 if (unlikely(!(pkt->opcode & IB_OPCODE_UD))) {
62 pr_warn_ratelimited("bad qp type\n");
63 goto err1;
64 }
65 break;
66 default:
67 pr_warn_ratelimited("unsupported qp type\n");
68 goto err1;
69 }
70
71 if (pkt->mask & RXE_REQ_MASK) {
72 if (unlikely(qp->resp.state != QP_STATE_READY))
73 goto err1;
74 } else if (unlikely(qp->req.state < QP_STATE_READY ||
75 qp->req.state > QP_STATE_DRAINED)) {
76 goto err1;
77 }
78
79 return 0;
80
81err1:
82 return -EINVAL;
83}
84
85static void set_bad_pkey_cntr(struct rxe_port *port)
86{
87 spin_lock_bh(&port->port_lock);
88 port->attr.bad_pkey_cntr = min((u32)0xffff,
89 port->attr.bad_pkey_cntr + 1);
90 spin_unlock_bh(&port->port_lock);
91}
92
93static void set_qkey_viol_cntr(struct rxe_port *port)
94{
95 spin_lock_bh(&port->port_lock);
96 port->attr.qkey_viol_cntr = min((u32)0xffff,
97 port->attr.qkey_viol_cntr + 1);
98 spin_unlock_bh(&port->port_lock);
99}
100
101static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
102 u32 qpn, struct rxe_qp *qp)
103{
104 int i;
105 int found_pkey = 0;
106 struct rxe_port *port = &rxe->port;
107 u16 pkey = bth_pkey(pkt);
108
109 pkt->pkey_index = 0;
110
111 if (qpn == 1) {
112 for (i = 0; i < port->attr.pkey_tbl_len; i++) {
113 if (pkey_match(pkey, port->pkey_tbl[i])) {
114 pkt->pkey_index = i;
115 found_pkey = 1;
116 break;
117 }
118 }
119
120 if (!found_pkey) {
121 pr_warn_ratelimited("bad pkey = 0x%x\n", pkey);
122 set_bad_pkey_cntr(port);
123 goto err1;
124 }
125 } else if (qpn != 0) {
126 if (unlikely(!pkey_match(pkey,
127 port->pkey_tbl[qp->attr.pkey_index]
128 ))) {
129 pr_warn_ratelimited("bad pkey = 0x%0x\n", pkey);
130 set_bad_pkey_cntr(port);
131 goto err1;
132 }
133 pkt->pkey_index = qp->attr.pkey_index;
134 }
135
136 if ((qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) &&
137 qpn != 0 && pkt->mask) {
138 u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey;
139
140 if (unlikely(deth_qkey(pkt) != qkey)) {
141 pr_warn_ratelimited("bad qkey, got 0x%x expected 0x%x for qpn 0x%x\n",
142 deth_qkey(pkt), qkey, qpn);
143 set_qkey_viol_cntr(port);
144 goto err1;
145 }
146 }
147
148 return 0;
149
150err1:
151 return -EINVAL;
152}
153
154static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
155 struct rxe_qp *qp)
156{
157 struct sk_buff *skb = PKT_TO_SKB(pkt);
158
159 if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC)
160 goto done;
161
162 if (unlikely(pkt->port_num != qp->attr.port_num)) {
163 pr_warn_ratelimited("port %d != qp port %d\n",
164 pkt->port_num, qp->attr.port_num);
165 goto err1;
166 }
167
168 if (skb->protocol == htons(ETH_P_IP)) {
169 struct in_addr *saddr =
170 &qp->pri_av.sgid_addr._sockaddr_in.sin_addr;
171 struct in_addr *daddr =
172 &qp->pri_av.dgid_addr._sockaddr_in.sin_addr;
173
174 if (ip_hdr(skb)->daddr != saddr->s_addr) {
175 pr_warn_ratelimited("dst addr %pI4 != qp source addr %pI4\n",
176 &ip_hdr(skb)->daddr,
177 &saddr->s_addr);
178 goto err1;
179 }
180
181 if (ip_hdr(skb)->saddr != daddr->s_addr) {
182 pr_warn_ratelimited("source addr %pI4 != qp dst addr %pI4\n",
183 &ip_hdr(skb)->saddr,
184 &daddr->s_addr);
185 goto err1;
186 }
187
188 } else if (skb->protocol == htons(ETH_P_IPV6)) {
189 struct in6_addr *saddr =
190 &qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr;
191 struct in6_addr *daddr =
192 &qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr;
193
194 if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr))) {
195 pr_warn_ratelimited("dst addr %pI6 != qp source addr %pI6\n",
196 &ipv6_hdr(skb)->daddr, saddr);
197 goto err1;
198 }
199
200 if (memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr))) {
201 pr_warn_ratelimited("source addr %pI6 != qp dst addr %pI6\n",
202 &ipv6_hdr(skb)->saddr, daddr);
203 goto err1;
204 }
205 }
206
207done:
208 return 0;
209
210err1:
211 return -EINVAL;
212}
213
214static int hdr_check(struct rxe_pkt_info *pkt)
215{
216 struct rxe_dev *rxe = pkt->rxe;
217 struct rxe_port *port = &rxe->port;
218 struct rxe_qp *qp = NULL;
219 u32 qpn = bth_qpn(pkt);
220 int index;
221 int err;
222
223 if (unlikely(bth_tver(pkt) != BTH_TVER)) {
224 pr_warn_ratelimited("bad tver\n");
225 goto err1;
226 }
227
228 if (qpn != IB_MULTICAST_QPN) {
229 index = (qpn == 0) ? port->qp_smi_index :
230 ((qpn == 1) ? port->qp_gsi_index : qpn);
231 qp = rxe_pool_get_index(&rxe->qp_pool, index);
232 if (unlikely(!qp)) {
233 pr_warn_ratelimited("no qp matches qpn 0x%x\n", qpn);
234 goto err1;
235 }
236
237 err = check_type_state(rxe, pkt, qp);
238 if (unlikely(err))
239 goto err2;
240
241 err = check_addr(rxe, pkt, qp);
242 if (unlikely(err))
243 goto err2;
244
245 err = check_keys(rxe, pkt, qpn, qp);
246 if (unlikely(err))
247 goto err2;
248 } else {
249 if (unlikely((pkt->mask & RXE_GRH_MASK) == 0)) {
250 pr_warn_ratelimited("no grh for mcast qpn\n");
251 goto err1;
252 }
253 }
254
255 pkt->qp = qp;
256 return 0;
257
258err2:
259 if (qp)
260 rxe_drop_ref(qp);
261err1:
262 return -EINVAL;
263}
264
265static inline void rxe_rcv_pkt(struct rxe_dev *rxe,
266 struct rxe_pkt_info *pkt,
267 struct sk_buff *skb)
268{
269 if (pkt->mask & RXE_REQ_MASK)
270 rxe_resp_queue_pkt(rxe, pkt->qp, skb);
271 else
272 rxe_comp_queue_pkt(rxe, pkt->qp, skb);
273}
274
275static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
276{
277 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
278 struct rxe_mc_grp *mcg;
279 struct sk_buff *skb_copy;
280 struct rxe_mc_elem *mce;
281 struct rxe_qp *qp;
282 union ib_gid dgid;
283 int err;
284
285 if (skb->protocol == htons(ETH_P_IP))
286 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
287 (struct in6_addr *)&dgid);
288 else if (skb->protocol == htons(ETH_P_IPV6))
289 memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid));
290
291 /* lookup mcast group corresponding to mgid, takes a ref */
292 mcg = rxe_pool_get_key(&rxe->mc_grp_pool, &dgid);
293 if (!mcg)
294 goto err1; /* mcast group not registered */
295
296 spin_lock_bh(&mcg->mcg_lock);
297
298 list_for_each_entry(mce, &mcg->qp_list, qp_list) {
299 qp = mce->qp;
300 pkt = SKB_TO_PKT(skb);
301
302 /* validate qp for incoming packet */
303 err = check_type_state(rxe, pkt, qp);
304 if (err)
305 continue;
306
307 err = check_keys(rxe, pkt, bth_qpn(pkt), qp);
308 if (err)
309 continue;
310
311 /* if *not* the last qp in the list
312 * make a copy of the skb to post to the next qp
313 */
314 skb_copy = (mce->qp_list.next != &mcg->qp_list) ?
Alexey Khoroshilov5e102b32016-09-02 23:46:53 +0300315 skb_clone(skb, GFP_ATOMIC) : NULL;
Moni Shoua8700e3e2016-06-16 16:45:23 +0300316
317 pkt->qp = qp;
318 rxe_add_ref(qp);
319 rxe_rcv_pkt(rxe, pkt, skb);
320
321 skb = skb_copy;
322 if (!skb)
323 break;
324 }
325
326 spin_unlock_bh(&mcg->mcg_lock);
327
328 rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */
329
330err1:
331 if (skb)
332 kfree_skb(skb);
333}
334
335static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb)
336{
337 union ib_gid dgid;
338 union ib_gid *pdgid;
339 u16 index;
340
341 if (skb->protocol == htons(ETH_P_IP)) {
342 ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
343 (struct in6_addr *)&dgid);
344 pdgid = &dgid;
345 } else {
346 pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr;
347 }
348
349 return ib_find_cached_gid_by_port(&rxe->ib_dev, pdgid,
350 IB_GID_TYPE_ROCE_UDP_ENCAP,
351 1, rxe->ndev, &index);
352}
353
354/* rxe_rcv is called from the interface driver */
355int rxe_rcv(struct sk_buff *skb)
356{
357 int err;
358 struct rxe_pkt_info *pkt = SKB_TO_PKT(skb);
359 struct rxe_dev *rxe = pkt->rxe;
360 __be32 *icrcp;
361 u32 calc_icrc, pack_icrc;
362
363 pkt->offset = 0;
364
365 if (unlikely(skb->len < pkt->offset + RXE_BTH_BYTES))
366 goto drop;
367
368 if (unlikely(rxe_match_dgid(rxe, skb) < 0)) {
369 pr_warn_ratelimited("failed matching dgid\n");
370 goto drop;
371 }
372
373 pkt->opcode = bth_opcode(pkt);
374 pkt->psn = bth_psn(pkt);
375 pkt->qp = NULL;
376 pkt->mask |= rxe_opcode[pkt->opcode].mask;
377
378 if (unlikely(skb->len < header_size(pkt)))
379 goto drop;
380
381 err = hdr_check(pkt);
382 if (unlikely(err))
383 goto drop;
384
385 /* Verify ICRC */
386 icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE);
387 pack_icrc = be32_to_cpu(*icrcp);
388
389 calc_icrc = rxe_icrc_hdr(pkt, skb);
390 calc_icrc = crc32_le(calc_icrc, (u8 *)payload_addr(pkt), payload_size(pkt));
391 calc_icrc = cpu_to_be32(~calc_icrc);
392 if (unlikely(calc_icrc != pack_icrc)) {
393 char saddr[sizeof(struct in6_addr)];
394
395 if (skb->protocol == htons(ETH_P_IPV6))
396 sprintf(saddr, "%pI6", &ipv6_hdr(skb)->saddr);
397 else if (skb->protocol == htons(ETH_P_IP))
398 sprintf(saddr, "%pI4", &ip_hdr(skb)->saddr);
399 else
400 sprintf(saddr, "unknown");
401
402 pr_warn_ratelimited("bad ICRC from %s\n", saddr);
403 goto drop;
404 }
405
406 if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN))
407 rxe_rcv_mcast_pkt(rxe, skb);
408 else
409 rxe_rcv_pkt(rxe, pkt, skb);
410
411 return 0;
412
413drop:
414 if (pkt->qp)
415 rxe_drop_ref(pkt->qp);
416
417 kfree_skb(skb);
418 return 0;
419}
420EXPORT_SYMBOL(rxe_rcv);