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authorJohannes Berg <johannes@sipsolutions.net>2008-07-29 07:22:51 -0400
committerJohn W. Linville <linville@tuxdriver.com>2008-07-29 16:55:08 -0400
commitbba95fefb8e31f4799652666d05a4a9aad56e492 (patch)
tree929ad49feb272974769c2eb64920504b236eda9b /net/wireless/nl80211.c
parentd0f09804144fd9471a13cf4d80e66842c7fa114f (diff)
nl80211: fix dump callbacks
Julius Volz pointed out that the dump callbacks in nl80211 were broken and fixed one of them. This patch fixes the other three and also addresses the TODOs there. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Julius Volz <juliusv@google.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c275
1 files changed, 153 insertions, 122 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index b7fefffd2d0d..59eb2cf42e5f 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -29,16 +29,16 @@ static struct genl_family nl80211_fam = {
29}; 29};
30 30
31/* internal helper: get drv and dev */ 31/* internal helper: get drv and dev */
32static int get_drv_dev_by_info_ifindex(struct genl_info *info, 32static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
33 struct cfg80211_registered_device **drv, 33 struct cfg80211_registered_device **drv,
34 struct net_device **dev) 34 struct net_device **dev)
35{ 35{
36 int ifindex; 36 int ifindex;
37 37
38 if (!info->attrs[NL80211_ATTR_IFINDEX]) 38 if (!attrs[NL80211_ATTR_IFINDEX])
39 return -EINVAL; 39 return -EINVAL;
40 40
41 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); 41 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
42 *dev = dev_get_by_index(&init_net, ifindex); 42 *dev = dev_get_by_index(&init_net, ifindex);
43 if (!*dev) 43 if (!*dev)
44 return -ENODEV; 44 return -ENODEV;
@@ -291,21 +291,31 @@ static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *
291 291
292 mutex_lock(&cfg80211_drv_mutex); 292 mutex_lock(&cfg80211_drv_mutex);
293 list_for_each_entry(dev, &cfg80211_drv_list, list) { 293 list_for_each_entry(dev, &cfg80211_drv_list, list) {
294 if (++wp_idx < wp_start) 294 if (wp_idx < wp_start) {
295 wp_idx++;
295 continue; 296 continue;
297 }
296 if_idx = 0; 298 if_idx = 0;
297 299
298 mutex_lock(&dev->devlist_mtx); 300 mutex_lock(&dev->devlist_mtx);
299 list_for_each_entry(wdev, &dev->netdev_list, list) { 301 list_for_each_entry(wdev, &dev->netdev_list, list) {
300 if (++if_idx < if_start) 302 if (if_idx < if_start) {
303 if_idx++;
301 continue; 304 continue;
305 }
302 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid, 306 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
303 cb->nlh->nlmsg_seq, NLM_F_MULTI, 307 cb->nlh->nlmsg_seq, NLM_F_MULTI,
304 wdev->netdev) < 0) 308 wdev->netdev) < 0) {
305 break; 309 mutex_unlock(&dev->devlist_mtx);
310 goto out;
311 }
312 if_idx++;
306 } 313 }
307 mutex_unlock(&dev->devlist_mtx); 314 mutex_unlock(&dev->devlist_mtx);
315
316 wp_idx++;
308 } 317 }
318 out:
309 mutex_unlock(&cfg80211_drv_mutex); 319 mutex_unlock(&cfg80211_drv_mutex);
310 320
311 cb->args[0] = wp_idx; 321 cb->args[0] = wp_idx;
@@ -321,7 +331,7 @@ static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
321 struct net_device *netdev; 331 struct net_device *netdev;
322 int err; 332 int err;
323 333
324 err = get_drv_dev_by_info_ifindex(info, &dev, &netdev); 334 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
325 if (err) 335 if (err)
326 return err; 336 return err;
327 337
@@ -392,7 +402,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
392 } else 402 } else
393 return -EINVAL; 403 return -EINVAL;
394 404
395 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 405 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
396 if (err) 406 if (err)
397 return err; 407 return err;
398 ifindex = dev->ifindex; 408 ifindex = dev->ifindex;
@@ -477,7 +487,7 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
477 int ifindex, err; 487 int ifindex, err;
478 struct net_device *dev; 488 struct net_device *dev;
479 489
480 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 490 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
481 if (err) 491 if (err)
482 return err; 492 return err;
483 ifindex = dev->ifindex; 493 ifindex = dev->ifindex;
@@ -545,7 +555,7 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
545 if (info->attrs[NL80211_ATTR_MAC]) 555 if (info->attrs[NL80211_ATTR_MAC])
546 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 556 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
547 557
548 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 558 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
549 if (err) 559 if (err)
550 return err; 560 return err;
551 561
@@ -618,7 +628,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
618 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT]) 628 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
619 return -EINVAL; 629 return -EINVAL;
620 630
621 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 631 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
622 if (err) 632 if (err)
623 return err; 633 return err;
624 634
@@ -699,7 +709,7 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
699 return -EINVAL; 709 return -EINVAL;
700 } 710 }
701 711
702 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 712 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
703 if (err) 713 if (err)
704 return err; 714 return err;
705 715
@@ -735,7 +745,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
735 if (info->attrs[NL80211_ATTR_MAC]) 745 if (info->attrs[NL80211_ATTR_MAC])
736 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 746 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
737 747
738 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 748 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
739 if (err) 749 if (err)
740 return err; 750 return err;
741 751
@@ -764,7 +774,7 @@ static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
764 struct beacon_parameters params; 774 struct beacon_parameters params;
765 int haveinfo = 0; 775 int haveinfo = 0;
766 776
767 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 777 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
768 if (err) 778 if (err)
769 return err; 779 return err;
770 780
@@ -843,7 +853,7 @@ static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
843 int err; 853 int err;
844 struct net_device *dev; 854 struct net_device *dev;
845 855
846 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 856 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
847 if (err) 857 if (err)
848 return err; 858 return err;
849 859
@@ -937,67 +947,78 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
937} 947}
938 948
939static int nl80211_dump_station(struct sk_buff *skb, 949static int nl80211_dump_station(struct sk_buff *skb,
940 struct netlink_callback *cb) 950 struct netlink_callback *cb)
941{ 951{
942 int wp_idx = 0;
943 int if_idx = 0;
944 int sta_idx = cb->args[2];
945 int wp_start = cb->args[0];
946 int if_start = cb->args[1];
947 struct station_info sinfo; 952 struct station_info sinfo;
948 struct cfg80211_registered_device *dev; 953 struct cfg80211_registered_device *dev;
949 struct wireless_dev *wdev; 954 struct net_device *netdev;
950 u8 mac_addr[ETH_ALEN]; 955 u8 mac_addr[ETH_ALEN];
956 int ifidx = cb->args[0];
957 int sta_idx = cb->args[1];
951 int err; 958 int err;
952 int exit = 0;
953 959
954 /* TODO: filter by device */ 960 if (!ifidx) {
955 mutex_lock(&cfg80211_drv_mutex); 961 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
956 list_for_each_entry(dev, &cfg80211_drv_list, list) { 962 nl80211_fam.attrbuf, nl80211_fam.maxattr,
957 if (exit) 963 nl80211_policy);
964 if (err)
965 return err;
966
967 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
968 return -EINVAL;
969
970 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
971 if (!ifidx)
972 return -EINVAL;
973 }
974
975 netdev = dev_get_by_index(&init_net, ifidx);
976 if (!netdev)
977 return -ENODEV;
978
979 dev = cfg80211_get_dev_from_ifindex(ifidx);
980 if (IS_ERR(dev)) {
981 err = PTR_ERR(dev);
982 goto out_put_netdev;
983 }
984
985 if (!dev->ops->dump_station) {
986 err = -ENOSYS;
987 goto out_err;
988 }
989
990 rtnl_lock();
991
992 while (1) {
993 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
994 mac_addr, &sinfo);
995 if (err == -ENOENT)
958 break; 996 break;
959 if (++wp_idx < wp_start) 997 if (err)
960 continue; 998 goto out_err_rtnl;
961 if_idx = 0;
962 999
963 mutex_lock(&dev->devlist_mtx); 1000 if (nl80211_send_station(skb,
964 list_for_each_entry(wdev, &dev->netdev_list, list) { 1001 NETLINK_CB(cb->skb).pid,
965 if (exit) 1002 cb->nlh->nlmsg_seq, NLM_F_MULTI,
966 break; 1003 netdev, mac_addr,
967 if (++if_idx < if_start) 1004 &sinfo) < 0)
968 continue; 1005 goto out;
969 if (!dev->ops->dump_station)
970 continue;
971 1006
972 for (;; ++sta_idx) { 1007 sta_idx++;
973 rtnl_lock();
974 err = dev->ops->dump_station(&dev->wiphy,
975 wdev->netdev, sta_idx, mac_addr,
976 &sinfo);
977 rtnl_unlock();
978 if (err) {
979 sta_idx = 0;
980 break;
981 }
982 if (nl80211_send_station(skb,
983 NETLINK_CB(cb->skb).pid,
984 cb->nlh->nlmsg_seq, NLM_F_MULTI,
985 wdev->netdev, mac_addr,
986 &sinfo) < 0) {
987 exit = 1;
988 break;
989 }
990 }
991 }
992 mutex_unlock(&dev->devlist_mtx);
993 } 1008 }
994 mutex_unlock(&cfg80211_drv_mutex);
995 1009
996 cb->args[0] = wp_idx;
997 cb->args[1] = if_idx;
998 cb->args[2] = sta_idx;
999 1010
1000 return skb->len; 1011 out:
1012 cb->args[1] = sta_idx;
1013 err = skb->len;
1014 out_err_rtnl:
1015 rtnl_unlock();
1016 out_err:
1017 cfg80211_put_dev(dev);
1018 out_put_netdev:
1019 dev_put(netdev);
1020
1021 return err;
1001} 1022}
1002 1023
1003static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) 1024static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
@@ -1016,7 +1037,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1016 1037
1017 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 1038 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1018 1039
1019 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1040 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1020 if (err) 1041 if (err)
1021 return err; 1042 return err;
1022 1043
@@ -1112,7 +1133,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1112 params.plink_action = 1133 params.plink_action =
1113 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); 1134 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1114 1135
1115 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1136 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1116 if (err) 1137 if (err)
1117 return err; 1138 return err;
1118 1139
@@ -1172,7 +1193,7 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1172 &params.station_flags)) 1193 &params.station_flags))
1173 return -EINVAL; 1194 return -EINVAL;
1174 1195
1175 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1196 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1176 if (err) 1197 if (err)
1177 return err; 1198 return err;
1178 1199
@@ -1207,7 +1228,7 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1207 if (info->attrs[NL80211_ATTR_MAC]) 1228 if (info->attrs[NL80211_ATTR_MAC])
1208 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 1229 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1209 1230
1210 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1231 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1211 if (err) 1232 if (err)
1212 return err; 1233 return err;
1213 1234
@@ -1277,68 +1298,78 @@ static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1277} 1298}
1278 1299
1279static int nl80211_dump_mpath(struct sk_buff *skb, 1300static int nl80211_dump_mpath(struct sk_buff *skb,
1280 struct netlink_callback *cb) 1301 struct netlink_callback *cb)
1281{ 1302{
1282 int wp_idx = 0;
1283 int if_idx = 0;
1284 int sta_idx = cb->args[2];
1285 int wp_start = cb->args[0];
1286 int if_start = cb->args[1];
1287 struct mpath_info pinfo; 1303 struct mpath_info pinfo;
1288 struct cfg80211_registered_device *dev; 1304 struct cfg80211_registered_device *dev;
1289 struct wireless_dev *wdev; 1305 struct net_device *netdev;
1290 u8 dst[ETH_ALEN]; 1306 u8 dst[ETH_ALEN];
1291 u8 next_hop[ETH_ALEN]; 1307 u8 next_hop[ETH_ALEN];
1308 int ifidx = cb->args[0];
1309 int path_idx = cb->args[1];
1292 int err; 1310 int err;
1293 int exit = 0;
1294 1311
1295 /* TODO: filter by device */ 1312 if (!ifidx) {
1296 mutex_lock(&cfg80211_drv_mutex); 1313 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1297 list_for_each_entry(dev, &cfg80211_drv_list, list) { 1314 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1298 if (exit) 1315 nl80211_policy);
1316 if (err)
1317 return err;
1318
1319 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1320 return -EINVAL;
1321
1322 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1323 if (!ifidx)
1324 return -EINVAL;
1325 }
1326
1327 netdev = dev_get_by_index(&init_net, ifidx);
1328 if (!netdev)
1329 return -ENODEV;
1330
1331 dev = cfg80211_get_dev_from_ifindex(ifidx);
1332 if (IS_ERR(dev)) {
1333 err = PTR_ERR(dev);
1334 goto out_put_netdev;
1335 }
1336
1337 if (!dev->ops->dump_mpath) {
1338 err = -ENOSYS;
1339 goto out_err;
1340 }
1341
1342 rtnl_lock();
1343
1344 while (1) {
1345 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1346 dst, next_hop, &pinfo);
1347 if (err == -ENOENT)
1299 break; 1348 break;
1300 if (++wp_idx < wp_start) 1349 if (err)
1301 continue; 1350 goto out_err_rtnl;
1302 if_idx = 0;
1303 1351
1304 mutex_lock(&dev->devlist_mtx); 1352 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1305 list_for_each_entry(wdev, &dev->netdev_list, list) { 1353 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1306 if (exit) 1354 netdev, dst, next_hop,
1307 break; 1355 &pinfo) < 0)
1308 if (++if_idx < if_start) 1356 goto out;
1309 continue;
1310 if (!dev->ops->dump_mpath)
1311 continue;
1312 1357
1313 for (;; ++sta_idx) { 1358 path_idx++;
1314 rtnl_lock();
1315 err = dev->ops->dump_mpath(&dev->wiphy,
1316 wdev->netdev, sta_idx, dst,
1317 next_hop, &pinfo);
1318 rtnl_unlock();
1319 if (err) {
1320 sta_idx = 0;
1321 break;
1322 }
1323 if (nl80211_send_mpath(skb,
1324 NETLINK_CB(cb->skb).pid,
1325 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1326 wdev->netdev, dst, next_hop,
1327 &pinfo) < 0) {
1328 exit = 1;
1329 break;
1330 }
1331 }
1332 }
1333 mutex_unlock(&dev->devlist_mtx);
1334 } 1359 }
1335 mutex_unlock(&cfg80211_drv_mutex);
1336 1360
1337 cb->args[0] = wp_idx;
1338 cb->args[1] = if_idx;
1339 cb->args[2] = sta_idx;
1340 1361
1341 return skb->len; 1362 out:
1363 cb->args[1] = path_idx;
1364 err = skb->len;
1365 out_err_rtnl:
1366 rtnl_unlock();
1367 out_err:
1368 cfg80211_put_dev(dev);
1369 out_put_netdev:
1370 dev_put(netdev);
1371
1372 return err;
1342} 1373}
1343 1374
1344static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info) 1375static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
@@ -1358,7 +1389,7 @@ static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1358 1389
1359 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 1390 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1360 1391
1361 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1392 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1362 if (err) 1393 if (err)
1363 return err; 1394 return err;
1364 1395
@@ -1411,7 +1442,7 @@ static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1411 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 1442 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1412 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 1443 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1413 1444
1414 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1445 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1415 if (err) 1446 if (err)
1416 return err; 1447 return err;
1417 1448
@@ -1446,7 +1477,7 @@ static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1446 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 1477 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1447 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 1478 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1448 1479
1449 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1480 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1450 if (err) 1481 if (err)
1451 return err; 1482 return err;
1452 1483
@@ -1475,7 +1506,7 @@ static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1475 if (info->attrs[NL80211_ATTR_MAC]) 1506 if (info->attrs[NL80211_ATTR_MAC])
1476 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 1507 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1477 1508
1478 err = get_drv_dev_by_info_ifindex(info, &drv, &dev); 1509 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1479 if (err) 1510 if (err)
1480 return err; 1511 return err;
1481 1512
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