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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/net/dcb/dcbnl.c
....@@ -1,17 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (c) 2008-2011, Intel Corporation.
3
- *
4
- * This program is free software; you can redistribute it and/or modify it
5
- * under the terms and conditions of the GNU General Public License,
6
- * version 2, as published by the Free Software Foundation.
7
- *
8
- * This program is distributed in the hope it will be useful, but WITHOUT
9
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11
- * more details.
12
- *
13
- * You should have received a copy of the GNU General Public License along with
14
- * this program; if not, see <http://www.gnu.org/licenses/>.
154  *
165  * Description: Data Center Bridging netlink interface
176  * Author: Lucy Liu <lucy.liu@intel.com>
....@@ -241,12 +230,13 @@
241230 	if (!netdev->dcbnl_ops->getpfccfg)
242231 		return -EOPNOTSUPP;
243232 
244
-	ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
245
-			       tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
233
+	ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
234
+					  tb[DCB_ATTR_PFC_CFG],
235
+					  dcbnl_pfc_up_nest, NULL);
246236 	if (ret)
247237 		return ret;
248238 
249
-	nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
239
+	nest = nla_nest_start_noflag(skb, DCB_ATTR_PFC_CFG);
250240 	if (!nest)
251241 		return -EMSGSIZE;
252242 
....@@ -299,12 +289,13 @@
299289 	if (!netdev->dcbnl_ops->getcap)
300290 		return -EOPNOTSUPP;
301291 
302
-	ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
303
-			       dcbnl_cap_nest, NULL);
292
+	ret = nla_parse_nested_deprecated(data, DCB_CAP_ATTR_MAX,
293
+					  tb[DCB_ATTR_CAP], dcbnl_cap_nest,
294
+					  NULL);
304295 	if (ret)
305296 		return ret;
306297 
307
-	nest = nla_nest_start(skb, DCB_ATTR_CAP);
298
+	nest = nla_nest_start_noflag(skb, DCB_ATTR_CAP);
308299 	if (!nest)
309300 		return -EMSGSIZE;
310301 
....@@ -343,12 +334,13 @@
343334 	if (!netdev->dcbnl_ops->getnumtcs)
344335 		return -EOPNOTSUPP;
345336 
346
-	ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
347
-			       dcbnl_numtcs_nest, NULL);
337
+	ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
338
+					  tb[DCB_ATTR_NUMTCS],
339
+					  dcbnl_numtcs_nest, NULL);
348340 	if (ret)
349341 		return ret;
350342 
351
-	nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
343
+	nest = nla_nest_start_noflag(skb, DCB_ATTR_NUMTCS);
352344 	if (!nest)
353345 		return -EMSGSIZE;
354346 
....@@ -388,8 +380,9 @@
388380 	if (!netdev->dcbnl_ops->setnumtcs)
389381 		return -EOPNOTSUPP;
390382 
391
-	ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
392
-			       dcbnl_numtcs_nest, NULL);
383
+	ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
384
+					  tb[DCB_ATTR_NUMTCS],
385
+					  dcbnl_numtcs_nest, NULL);
393386 	if (ret)
394387 		return ret;
395388 
....@@ -447,8 +440,9 @@
447440 	if (!tb[DCB_ATTR_APP])
448441 		return -EINVAL;
449442 
450
-	ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
451
-			       dcbnl_app_nest, NULL);
443
+	ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
444
+					  tb[DCB_ATTR_APP], dcbnl_app_nest,
445
+					  NULL);
452446 	if (ret)
453447 		return ret;
454448 
....@@ -479,7 +473,7 @@
479473 		up = dcb_getapp(netdev, &app);
480474 	}
481475 
482
-	app_nest = nla_nest_start(skb, DCB_ATTR_APP);
476
+	app_nest = nla_nest_start_noflag(skb, DCB_ATTR_APP);
483477 	if (!app_nest)
484478 		return -EMSGSIZE;
485479 
....@@ -515,8 +509,9 @@
515509 	if (!tb[DCB_ATTR_APP])
516510 		return -EINVAL;
517511 
518
-	ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
519
-			       dcbnl_app_nest, NULL);
512
+	ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
513
+					  tb[DCB_ATTR_APP], dcbnl_app_nest,
514
+					  NULL);
520515 	if (ret)
521516 		return ret;
522517 
....@@ -573,12 +568,13 @@
573568 	    !netdev->dcbnl_ops->getpgbwgcfgrx)
574569 		return -EOPNOTSUPP;
575570 
576
-	ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
577
-			       dcbnl_pg_nest, NULL);
571
+	ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
572
+					  tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
573
+					  NULL);
578574 	if (ret)
579575 		return ret;
580576 
581
-	pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
577
+	pg_nest = nla_nest_start_noflag(skb, DCB_ATTR_PG_CFG);
582578 	if (!pg_nest)
583579 		return -EMSGSIZE;
584580 
....@@ -593,12 +589,13 @@
593589 			data = pg_tb[DCB_PG_ATTR_TC_ALL];
594590 		else
595591 			data = pg_tb[i];
596
-		ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX, data,
597
-				       dcbnl_tc_param_nest, NULL);
592
+		ret = nla_parse_nested_deprecated(param_tb,
593
+						  DCB_TC_ATTR_PARAM_MAX, data,
594
+						  dcbnl_tc_param_nest, NULL);
598595 		if (ret)
599596 			goto err_pg;
600597 
601
-		param_nest = nla_nest_start(skb, i);
598
+		param_nest = nla_nest_start_noflag(skb, i);
602599 		if (!param_nest)
603600 			goto err_pg;
604601 
....@@ -730,8 +727,9 @@
730727 	if (!netdev->dcbnl_ops->setpfccfg)
731728 		return -EOPNOTSUPP;
732729 
733
-	ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
734
-			       tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
730
+	ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
731
+					  tb[DCB_ATTR_PFC_CFG],
732
+					  dcbnl_pfc_up_nest, NULL);
735733 	if (ret)
736734 		return ret;
737735 
....@@ -786,8 +784,9 @@
786784 	    !netdev->dcbnl_ops->setpgbwgcfgrx)
787785 		return -EOPNOTSUPP;
788786 
789
-	ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
790
-			       dcbnl_pg_nest, NULL);
787
+	ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
788
+					  tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
789
+					  NULL);
791790 	if (ret)
792791 		return ret;
793792 
....@@ -795,8 +794,10 @@
795794 		if (!pg_tb[i])
796795 			continue;
797796 
798
-		ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
799
-				       pg_tb[i], dcbnl_tc_param_nest, NULL);
797
+		ret = nla_parse_nested_deprecated(param_tb,
798
+						  DCB_TC_ATTR_PARAM_MAX,
799
+						  pg_tb[i],
800
+						  dcbnl_tc_param_nest, NULL);
800801 		if (ret)
801802 			return ret;
802803 
....@@ -884,12 +885,13 @@
884885 	    !netdev->dcbnl_ops->getbcncfg)
885886 		return -EOPNOTSUPP;
886887 
887
-	ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
888
-			       dcbnl_bcn_nest, NULL);
888
+	ret = nla_parse_nested_deprecated(bcn_tb, DCB_BCN_ATTR_MAX,
889
+					  tb[DCB_ATTR_BCN], dcbnl_bcn_nest,
890
+					  NULL);
889891 	if (ret)
890892 		return ret;
891893 
892
-	bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
894
+	bcn_nest = nla_nest_start_noflag(skb, DCB_ATTR_BCN);
893895 	if (!bcn_nest)
894896 		return -EMSGSIZE;
895897 
....@@ -943,8 +945,9 @@
943945 	    !netdev->dcbnl_ops->setbcnrp)
944946 		return -EOPNOTSUPP;
945947 
946
-	ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
947
-			       dcbnl_pfc_up_nest, NULL);
948
+	ret = nla_parse_nested_deprecated(data, DCB_BCN_ATTR_MAX,
949
+					  tb[DCB_ATTR_BCN], dcbnl_bcn_nest,
950
+					  NULL);
948951 	if (ret)
949952 		return ret;
950953 
....@@ -1002,7 +1005,7 @@
10021005 		 */
10031006 		err = -EMSGSIZE;
10041007 
1005
-		app = nla_nest_start(skb, app_nested_type);
1008
+		app = nla_nest_start_noflag(skb, app_nested_type);
10061009 		if (!app)
10071010 			goto nla_put_failure;
10081011 
....@@ -1036,7 +1039,7 @@
10361039 	if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
10371040 		return -EMSGSIZE;
10381041 
1039
-	ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1042
+	ieee = nla_nest_start_noflag(skb, DCB_ATTR_IEEE);
10401043 	if (!ieee)
10411044 		return -EMSGSIZE;
10421045 
....@@ -1106,7 +1109,7 @@
11061109 			return -EMSGSIZE;
11071110 	}
11081111 
1109
-	app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1112
+	app = nla_nest_start_noflag(skb, DCB_ATTR_IEEE_APP_TABLE);
11101113 	if (!app)
11111114 		return -EMSGSIZE;
11121115 
....@@ -1174,13 +1177,13 @@
11741177 	u8 pgid, up_map, prio, tc_pct;
11751178 	const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
11761179 	int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1177
-	struct nlattr *pg = nla_nest_start(skb, i);
1180
+	struct nlattr *pg = nla_nest_start_noflag(skb, i);
11781181 
11791182 	if (!pg)
11801183 		return -EMSGSIZE;
11811184 
11821185 	for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1183
-		struct nlattr *tc_nest = nla_nest_start(skb, i);
1186
+		struct nlattr *tc_nest = nla_nest_start_noflag(skb, i);
11841187 
11851188 		if (!tc_nest)
11861189 			return -EMSGSIZE;
....@@ -1231,7 +1234,7 @@
12311234 
12321235 	if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
12331236 		goto nla_put_failure;
1234
-	cee = nla_nest_start(skb, DCB_ATTR_CEE);
1237
+	cee = nla_nest_start_noflag(skb, DCB_ATTR_CEE);
12351238 	if (!cee)
12361239 		goto nla_put_failure;
12371240 
....@@ -1250,7 +1253,8 @@
12501253 
12511254 	/* local pfc */
12521255 	if (ops->getpfccfg) {
1253
-		struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1256
+		struct nlattr *pfc_nest = nla_nest_start_noflag(skb,
1257
+								DCB_ATTR_CEE_PFC);
12541258 
12551259 		if (!pfc_nest)
12561260 			goto nla_put_failure;
....@@ -1265,14 +1269,14 @@
12651269 
12661270 	/* local app */
12671271 	spin_lock_bh(&dcb_lock);
1268
-	app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1272
+	app = nla_nest_start_noflag(skb, DCB_ATTR_CEE_APP_TABLE);
12691273 	if (!app)
12701274 		goto dcb_unlock;
12711275 
12721276 	list_for_each_entry(itr, &dcb_app_list, list) {
12731277 		if (itr->ifindex == netdev->ifindex) {
1274
-			struct nlattr *app_nest = nla_nest_start(skb,
1275
-								 DCB_ATTR_APP);
1278
+			struct nlattr *app_nest = nla_nest_start_noflag(skb,
1279
+									DCB_ATTR_APP);
12761280 			if (!app_nest)
12771281 				goto dcb_unlock;
12781282 
....@@ -1305,7 +1309,8 @@
13051309 
13061310 	/* features flags */
13071311 	if (ops->getfeatcfg) {
1308
-		struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1312
+		struct nlattr *feat = nla_nest_start_noflag(skb,
1313
+							    DCB_ATTR_CEE_FEAT);
13091314 		if (!feat)
13101315 			goto nla_put_failure;
13111316 
....@@ -1430,8 +1435,9 @@
14301435 	if (!tb[DCB_ATTR_IEEE])
14311436 		return -EINVAL;
14321437 
1433
-	err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX, tb[DCB_ATTR_IEEE],
1434
-			       dcbnl_ieee_policy, NULL);
1438
+	err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1439
+					  tb[DCB_ATTR_IEEE],
1440
+					  dcbnl_ieee_policy, NULL);
14351441 	if (err)
14361442 		return err;
14371443 
....@@ -1537,8 +1543,9 @@
15371543 	if (!tb[DCB_ATTR_IEEE])
15381544 		return -EINVAL;
15391545 
1540
-	err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX, tb[DCB_ATTR_IEEE],
1541
-			       dcbnl_ieee_policy, NULL);
1546
+	err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1547
+					  tb[DCB_ATTR_IEEE],
1548
+					  dcbnl_ieee_policy, NULL);
15421549 	if (err)
15431550 		return err;
15441551 
....@@ -1610,12 +1617,13 @@
16101617 	if (!tb[DCB_ATTR_FEATCFG])
16111618 		return -EINVAL;
16121619 
1613
-	ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX,
1614
-			       tb[DCB_ATTR_FEATCFG], dcbnl_featcfg_nest, NULL);
1620
+	ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1621
+					  tb[DCB_ATTR_FEATCFG],
1622
+					  dcbnl_featcfg_nest, NULL);
16151623 	if (ret)
16161624 		return ret;
16171625 
1618
-	nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1626
+	nest = nla_nest_start_noflag(skb, DCB_ATTR_FEATCFG);
16191627 	if (!nest)
16201628 		return -EMSGSIZE;
16211629 
....@@ -1654,8 +1662,9 @@
16541662 	if (!tb[DCB_ATTR_FEATCFG])
16551663 		return -EINVAL;
16561664 
1657
-	ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX,
1658
-			       tb[DCB_ATTR_FEATCFG], dcbnl_featcfg_nest, NULL);
1665
+	ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1666
+					  tb[DCB_ATTR_FEATCFG],
1667
+					  dcbnl_featcfg_nest, NULL);
16591668 
16601669 	if (ret)
16611670 		goto err;
....@@ -1735,7 +1744,7 @@
17351744 	struct net_device *netdev;
17361745 	struct dcbmsg *dcb = nlmsg_data(nlh);
17371746 	struct nlattr *tb[DCB_ATTR_MAX + 1];
1738
-	u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1747
+	u32 portid = NETLINK_CB(skb).portid;
17391748 	int ret = -EINVAL;
17401749 	struct sk_buff *reply_skb;
17411750 	struct nlmsghdr *reply_nlh = NULL;
....@@ -1744,8 +1753,8 @@
17441753 	if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
17451754 		return -EPERM;
17461755 
1747
-	ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1748
-			  dcbnl_rtnl_policy, extack);
1756
+	ret = nlmsg_parse_deprecated(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1757
+				     dcbnl_rtnl_policy, extack);
17491758 	if (ret < 0)
17501759 		return ret;
17511760 
....@@ -2054,10 +2063,54 @@
20542063 }
20552064 EXPORT_SYMBOL(dcb_ieee_getapp_default_prio_mask);
20562065 
2066
+static void dcbnl_flush_dev(struct net_device *dev)
2067
+{
2068
+	struct dcb_app_type *itr, *tmp;
2069
+
2070
+	spin_lock_bh(&dcb_lock);
2071
+
2072
+	list_for_each_entry_safe(itr, tmp, &dcb_app_list, list) {
2073
+		if (itr->ifindex == dev->ifindex) {
2074
+			list_del(&itr->list);
2075
+			kfree(itr);
2076
+		}
2077
+	}
2078
+
2079
+	spin_unlock_bh(&dcb_lock);
2080
+}
2081
+
2082
+static int dcbnl_netdevice_event(struct notifier_block *nb,
2083
+				 unsigned long event, void *ptr)
2084
+{
2085
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2086
+
2087
+	switch (event) {
2088
+	case NETDEV_UNREGISTER:
2089
+		if (!dev->dcbnl_ops)
2090
+			return NOTIFY_DONE;
2091
+
2092
+		dcbnl_flush_dev(dev);
2093
+
2094
+		return NOTIFY_OK;
2095
+	default:
2096
+		return NOTIFY_DONE;
2097
+	}
2098
+}
2099
+
2100
+static struct notifier_block dcbnl_nb __read_mostly = {
2101
+	.notifier_call  = dcbnl_netdevice_event,
2102
+};
2103
+
20572104 static int __init dcbnl_init(void)
20582105 {
2106
+	int err;
2107
+
20592108 	INIT_LIST_HEAD(&dcb_app_list);
20602109 
2110
+	err = register_netdevice_notifier(&dcbnl_nb);
2111
+	if (err)
2112
+		return err;
2113
+
20612114 	rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, 0);
20622115 	rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, 0);
20632116