From 14c0b97ddfc2944982d078b8e33b088840068976 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Fri, 4 Aug 2006 03:38:38 -0700 Subject: [NET]: Protocol Independant Policy Routing Rules Framework Derived from net/ipv/fib_rules.c Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 30cc1ba6ed5c..aa7cff2257b1 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -49,6 +49,7 @@ #include #include #include +#include #include #ifdef CONFIG_NET_WIRELESS_RTNETLINK #include @@ -103,7 +104,7 @@ static const int rtm_min[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), [RTM_FAM(RTM_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)), - [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), + [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), @@ -120,7 +121,7 @@ static const int rta_max[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX, - [RTM_FAM(RTM_NEWRULE)] = RTA_MAX, + [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, @@ -757,6 +758,10 @@ static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add }, [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete }, [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }, +#ifdef CONFIG_FIB_RULES + [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule }, + [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule }, +#endif [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info }, [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set }, -- cgit v1.2.3 From 1823730fbc89fadde72a7bb3b7bdf03cc7b8835c Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Fri, 4 Aug 2006 23:04:54 -0700 Subject: [IPv4]: Move interface address bits to linux/if_addr.h Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index aa7cff2257b1..35712031e2c3 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include -- cgit v1.2.3 From da5e0494c542dddc56a1f1edfd30310ea30f41ff Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 10 Aug 2006 21:17:37 -0700 Subject: [NET]: Convert link modification to new netlink api Transforms do_setlink() into rtnl_setlink() using the new netlink api. A warning message printed to the console is added in the event that a change request fails while part of the change request has been comitted already. The ioctl() based nature of net devices makes it almost impossible to move on to atomic netlink operations without obsoleting some of the functionality. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 191 +++++++++++++++++++++++++++------------------------ 1 file changed, 100 insertions(+), 91 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 35712031e2c3..2adc966d981e 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -336,52 +336,69 @@ static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *c return skb->len; } -static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) +static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = { + [IFLA_IFNAME] = { .type = NLA_STRING }, + [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) }, + [IFLA_MTU] = { .type = NLA_U32 }, + [IFLA_TXQLEN] = { .type = NLA_U32 }, + [IFLA_WEIGHT] = { .type = NLA_U32 }, + [IFLA_OPERSTATE] = { .type = NLA_U8 }, + [IFLA_LINKMODE] = { .type = NLA_U8 }, +}; + +static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { - struct ifinfomsg *ifm = NLMSG_DATA(nlh); - struct rtattr **ida = arg; + struct ifinfomsg *ifm; struct net_device *dev; - int err, send_addr_notify = 0; + int err, send_addr_notify = 0, modified = 0; + struct nlattr *tb[IFLA_MAX+1]; + char ifname[IFNAMSIZ]; + err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); + if (err < 0) + goto errout; + + if (tb[IFLA_IFNAME] && + nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ) >= IFNAMSIZ) + return -EINVAL; + + err = -EINVAL; + ifm = nlmsg_data(nlh); if (ifm->ifi_index >= 0) dev = dev_get_by_index(ifm->ifi_index); - else if (ida[IFLA_IFNAME - 1]) { - char ifname[IFNAMSIZ]; - - if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1], - IFNAMSIZ) >= IFNAMSIZ) - return -EINVAL; + else if (tb[IFLA_IFNAME]) dev = dev_get_by_name(ifname); - } else - return -EINVAL; + else + goto errout; - if (!dev) - return -ENODEV; + if (dev == NULL) { + err = -ENODEV; + goto errout; + } - err = -EINVAL; + if (tb[IFLA_ADDRESS] && + nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) + goto errout_dev; - if (ifm->ifi_flags) - dev_change_flags(dev, ifm->ifi_flags); + if (tb[IFLA_BROADCAST] && + nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) + goto errout_dev; - if (ida[IFLA_MAP - 1]) { + if (tb[IFLA_MAP]) { struct rtnl_link_ifmap *u_map; struct ifmap k_map; if (!dev->set_config) { err = -EOPNOTSUPP; - goto out; + goto errout_dev; } if (!netif_device_present(dev)) { err = -ENODEV; - goto out; + goto errout_dev; } - - if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map))) - goto out; - - u_map = RTA_DATA(ida[IFLA_MAP - 1]); + u_map = nla_data(tb[IFLA_MAP]); k_map.mem_start = (unsigned long) u_map->mem_start; k_map.mem_end = (unsigned long) u_map->mem_end; k_map.base_addr = (unsigned short) u_map->base_addr; @@ -390,119 +407,111 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) k_map.port = (unsigned char) u_map->port; err = dev->set_config(dev, &k_map); + if (err < 0) + goto errout_dev; - if (err) - goto out; + modified = 1; } - if (ida[IFLA_ADDRESS - 1]) { + if (tb[IFLA_ADDRESS]) { struct sockaddr *sa; int len; if (!dev->set_mac_address) { err = -EOPNOTSUPP; - goto out; + goto errout_dev; } + if (!netif_device_present(dev)) { err = -ENODEV; - goto out; + goto errout_dev; } - if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len)) - goto out; len = sizeof(sa_family_t) + dev->addr_len; sa = kmalloc(len, GFP_KERNEL); if (!sa) { err = -ENOMEM; - goto out; + goto errout_dev; } sa->sa_family = dev->type; - memcpy(sa->sa_data, RTA_DATA(ida[IFLA_ADDRESS - 1]), + memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), dev->addr_len); err = dev->set_mac_address(dev, sa); kfree(sa); if (err) - goto out; + goto errout_dev; send_addr_notify = 1; + modified = 1; } - if (ida[IFLA_BROADCAST - 1]) { - if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len)) - goto out; - memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]), - dev->addr_len); - send_addr_notify = 1; + if (tb[IFLA_MTU]) { + err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); + if (err < 0) + goto errout_dev; + modified = 1; } - if (ida[IFLA_MTU - 1]) { - if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32))) - goto out; - err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1]))); - - if (err) - goto out; - + /* + * Interface selected by interface index but interface + * name provided implies that a name change has been + * requested. + */ + if (ifm->ifi_index >= 0 && ifname[0]) { + err = dev_change_name(dev, ifname); + if (err < 0) + goto errout_dev; + modified = 1; } - if (ida[IFLA_TXQLEN - 1]) { - if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32))) - goto out; +#ifdef CONFIG_NET_WIRELESS_RTNETLINK + if (tb[IFLA_WIRELESS]) { + /* Call Wireless Extensions. + * Various stuff checked in there... */ + err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]), + nla_len(tb[IFLA_WIRELESS])); + if (err < 0) + goto errout_dev; + } +#endif /* CONFIG_NET_WIRELESS_RTNETLINK */ - dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1])); + if (tb[IFLA_BROADCAST]) { + nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); + send_addr_notify = 1; } - if (ida[IFLA_WEIGHT - 1]) { - if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32))) - goto out; - dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1])); - } + if (ifm->ifi_flags) + dev_change_flags(dev, ifm->ifi_flags); - if (ida[IFLA_OPERSTATE - 1]) { - if (ida[IFLA_OPERSTATE - 1]->rta_len != RTA_LENGTH(sizeof(u8))) - goto out; + if (tb[IFLA_TXQLEN]) + dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); - set_operstate(dev, *((u8 *) RTA_DATA(ida[IFLA_OPERSTATE - 1]))); - } + if (tb[IFLA_WEIGHT]) + dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); - if (ida[IFLA_LINKMODE - 1]) { - if (ida[IFLA_LINKMODE - 1]->rta_len != RTA_LENGTH(sizeof(u8))) - goto out; + if (tb[IFLA_OPERSTATE]) + set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); + if (tb[IFLA_LINKMODE]) { write_lock_bh(&dev_base_lock); - dev->link_mode = *((u8 *) RTA_DATA(ida[IFLA_LINKMODE - 1])); + dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); write_unlock_bh(&dev_base_lock); } - if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) { - char ifname[IFNAMSIZ]; - - if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1], - IFNAMSIZ) >= IFNAMSIZ) - goto out; - err = dev_change_name(dev, ifname); - if (err) - goto out; - } - -#ifdef CONFIG_NET_WIRELESS_RTNETLINK - if (ida[IFLA_WIRELESS - 1]) { - - /* Call Wireless Extensions. - * Various stuff checked in there... */ - err = wireless_rtnetlink_set(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len); - if (err) - goto out; - } -#endif /* CONFIG_NET_WIRELESS_RTNETLINK */ - err = 0; -out: +errout_dev: + if (err < 0 && modified && net_ratelimit()) + printk(KERN_WARNING "A link change request failed with " + "some changes comitted already. Interface %s may " + "have been left with an inconsistent configuration, " + "please check.\n", dev->name); + if (send_addr_notify) call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); dev_put(dev); +errout: return err; } @@ -753,7 +762,7 @@ static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = .doit = do_getlink, #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ .dumpit = rtnetlink_dump_ifinfo }, - [RTM_SETLINK - RTM_BASE] = { .doit = do_setlink }, + [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink }, [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add }, -- cgit v1.2.3 From b60c5115f4abf0b961a18682889798dcfbe6a801 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Fri, 4 Aug 2006 23:05:34 -0700 Subject: [NET]: Convert link dumping to new netlink api Transforms netlink code to dump link tables to use the new netlink api. Makes rtnl_getlink() available regardless of the availability of the wireless extensions. Adding copy_rtnl_link_stats() avoids the structural dependency of struct rtnl_link_stats on struct net_device_stats and thus avoids troubles later on. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 281 +++++++++++++++++++++++++-------------------------- 1 file changed, 137 insertions(+), 144 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 2adc966d981e..93ba04fb8444 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -218,41 +218,73 @@ static void set_operstate(struct net_device *dev, unsigned char transition) } } -static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, - int type, u32 pid, u32 seq, u32 change, - unsigned int flags) +static void copy_rtnl_link_stats(struct rtnl_link_stats *a, + struct net_device_stats *b) { - struct ifinfomsg *r; - struct nlmsghdr *nlh; - unsigned char *b = skb->tail; - - nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags); - r = NLMSG_DATA(nlh); - r->ifi_family = AF_UNSPEC; - r->__ifi_pad = 0; - r->ifi_type = dev->type; - r->ifi_index = dev->ifindex; - r->ifi_flags = dev_get_flags(dev); - r->ifi_change = change; + a->rx_packets = b->rx_packets; + a->tx_packets = b->tx_packets; + a->rx_bytes = b->rx_bytes; + a->tx_bytes = b->tx_bytes; + a->rx_errors = b->rx_errors; + a->tx_errors = b->tx_errors; + a->rx_dropped = b->rx_dropped; + a->tx_dropped = b->tx_dropped; + + a->multicast = b->multicast; + a->collisions = b->collisions; + + a->rx_length_errors = b->rx_length_errors; + a->rx_over_errors = b->rx_over_errors; + a->rx_crc_errors = b->rx_crc_errors; + a->rx_frame_errors = b->rx_frame_errors; + a->rx_fifo_errors = b->rx_fifo_errors; + a->rx_missed_errors = b->rx_missed_errors; + + a->tx_aborted_errors = b->tx_aborted_errors; + a->tx_carrier_errors = b->tx_carrier_errors; + a->tx_fifo_errors = b->tx_fifo_errors; + a->tx_heartbeat_errors = b->tx_heartbeat_errors; + a->tx_window_errors = b->tx_window_errors; + + a->rx_compressed = b->rx_compressed; + a->tx_compressed = b->tx_compressed; +}; - RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name); +static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, + void *iwbuf, int iwbuflen, int type, u32 pid, + u32 seq, u32 change, unsigned int flags) +{ + struct ifinfomsg *ifm; + struct nlmsghdr *nlh; - if (1) { - u32 txqlen = dev->tx_queue_len; - RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen); - } + nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); + if (nlh == NULL) + return -ENOBUFS; - if (1) { - u32 weight = dev->weight; - RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight); - } + ifm = nlmsg_data(nlh); + ifm->ifi_family = AF_UNSPEC; + ifm->__ifi_pad = 0; + ifm->ifi_type = dev->type; + ifm->ifi_index = dev->ifindex; + ifm->ifi_flags = dev_get_flags(dev); + ifm->ifi_change = change; + + NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); + NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); + NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight); + NLA_PUT_U8(skb, IFLA_OPERSTATE, + netif_running(dev) ? dev->operstate : IF_OPER_DOWN); + NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); + NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); + + if (dev->ifindex != dev->iflink) + NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); + + if (dev->master) + NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); - if (1) { - u8 operstate = netif_running(dev)?dev->operstate:IF_OPER_DOWN; - u8 link_mode = dev->link_mode; - RTA_PUT(skb, IFLA_OPERSTATE, sizeof(operstate), &operstate); - RTA_PUT(skb, IFLA_LINKMODE, sizeof(link_mode), &link_mode); - } + if (dev->qdisc_sleeping) + NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id); if (1) { struct rtnl_link_ifmap map = { @@ -263,58 +295,38 @@ static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, .dma = dev->dma, .port = dev->if_port, }; - RTA_PUT(skb, IFLA_MAP, sizeof(map), &map); + NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); } if (dev->addr_len) { - RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); - RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); - } - - if (1) { - u32 mtu = dev->mtu; - RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu); - } - - if (dev->ifindex != dev->iflink) { - u32 iflink = dev->iflink; - RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink); - } - - if (dev->qdisc_sleeping) - RTA_PUT(skb, IFLA_QDISC, - strlen(dev->qdisc_sleeping->ops->id) + 1, - dev->qdisc_sleeping->ops->id); - - if (dev->master) { - u32 master = dev->master->ifindex; - RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master); + NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); + NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); } if (dev->get_stats) { - unsigned long *stats = (unsigned long*)dev->get_stats(dev); + struct net_device_stats *stats = dev->get_stats(dev); if (stats) { - struct rtattr *a; - __u32 *s; - int i; - int n = sizeof(struct rtnl_link_stats)/4; - - a = __RTA_PUT(skb, IFLA_STATS, n*4); - s = RTA_DATA(a); - for (i=0; inlmsg_len = skb->tail - b; - return skb->len; -nlmsg_failure: -rtattr_failure: - skb_trim(skb, b - skb->data); - return -1; + if (iwbuf) + NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf); + + return nlmsg_end(skb, nlh); + +nla_put_failure: + return nlmsg_cancel(skb, nlh); } -static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) +static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) { int idx; int s_idx = cb->args[0]; @@ -324,10 +336,9 @@ static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *c for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) { if (idx < s_idx) continue; - if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK, - NETLINK_CB(cb->skb).pid, - cb->nlh->nlmsg_seq, 0, - NLM_F_MULTI) <= 0) + if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK, + NETLINK_CB(cb->skb).pid, + cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0) break; } read_unlock(&dev_base_lock); @@ -515,84 +526,69 @@ errout: return err; } -#ifdef CONFIG_NET_WIRELESS_RTNETLINK -static int do_getlink(struct sk_buff *in_skb, struct nlmsghdr* in_nlh, void *arg) +static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) { - struct ifinfomsg *ifm = NLMSG_DATA(in_nlh); - struct rtattr **ida = arg; - struct net_device *dev; - struct ifinfomsg *r; - struct nlmsghdr *nlh; - int err = -ENOBUFS; - struct sk_buff *skb; - unsigned char *b; - char *iw_buf = NULL; + struct ifinfomsg *ifm; + struct nlattr *tb[IFLA_MAX+1]; + struct net_device *dev = NULL; + struct sk_buff *nskb; + char *iw_buf = NULL, *iw = NULL; int iw_buf_len = 0; + int err, payload; - if (ifm->ifi_index >= 0) + err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); + if (err < 0) + goto errout; + + ifm = nlmsg_data(nlh); + if (ifm->ifi_index >= 0) { dev = dev_get_by_index(ifm->ifi_index); - else + if (dev == NULL) + return -ENODEV; + } else return -EINVAL; - if (!dev) - return -ENODEV; -#ifdef CONFIG_NET_WIRELESS_RTNETLINK - if (ida[IFLA_WIRELESS - 1]) { +#ifdef CONFIG_NET_WIRELESS_RTNETLINK + if (tb[IFLA_WIRELESS]) { /* Call Wireless Extensions. We need to know the size before * we can alloc. Various stuff checked in there... */ - err = wireless_rtnetlink_get(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len, &iw_buf, &iw_buf_len); - if (err) - goto out; + err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]), + nla_len(tb[IFLA_WIRELESS]), + &iw_buf, &iw_buf_len); + if (err < 0) + goto errout; + + iw += IW_EV_POINT_OFF; } #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ - /* Create a skb big enough to include all the data. - * Some requests are way bigger than 4k... Jean II */ - skb = alloc_skb((NLMSG_LENGTH(sizeof(*r))) + (RTA_SPACE(iw_buf_len)), - GFP_KERNEL); - if (!skb) - goto out; - b = skb->tail; - - /* Put in the message the usual good stuff */ - nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, in_nlh->nlmsg_seq, - RTM_NEWLINK, sizeof(*r)); - r = NLMSG_DATA(nlh); - r->ifi_family = AF_UNSPEC; - r->__ifi_pad = 0; - r->ifi_type = dev->type; - r->ifi_index = dev->ifindex; - r->ifi_flags = dev->flags; - r->ifi_change = 0; - - /* Put the wireless payload if it exist */ - if(iw_buf != NULL) - RTA_PUT(skb, IFLA_WIRELESS, iw_buf_len, - iw_buf + IW_EV_POINT_OFF); - - nlh->nlmsg_len = skb->tail - b; - - /* Needed ? */ - NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; - - err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT); + payload = NLMSG_ALIGN(sizeof(struct ifinfomsg) + + nla_total_size(iw_buf_len)); + nskb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL); + if (nskb == NULL) { + err = -ENOBUFS; + goto errout; + } + + err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK, + NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0); + if (err <= 0) { + kfree_skb(skb); + goto errout; + } + + err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).pid, MSG_DONTWAIT); if (err > 0) err = 0; -out: - if(iw_buf != NULL) - kfree(iw_buf); +errout: + kfree(iw_buf); dev_put(dev); - return err; -rtattr_failure: -nlmsg_failure: - kfree_skb(skb); - goto out; + return err; } -#endif /* CONFIG_NET_WIRELESS_RTNETLINK */ -static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb) +static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) { int idx; int s_idx = cb->family; @@ -623,11 +619,11 @@ void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) sizeof(struct rtnl_link_ifmap) + sizeof(struct rtnl_link_stats) + 128); - skb = alloc_skb(size, GFP_KERNEL); + skb = nlmsg_new(size, GFP_KERNEL); if (!skb) return; - if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change, 0) < 0) { + if (rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0) < 0) { kfree_skb(skb); return; } @@ -757,14 +753,11 @@ static void rtnetlink_rcv(struct sock *sk, int len) static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = { - [RTM_GETLINK - RTM_BASE] = { -#ifdef CONFIG_NET_WIRELESS_RTNETLINK - .doit = do_getlink, -#endif /* CONFIG_NET_WIRELESS_RTNETLINK */ - .dumpit = rtnetlink_dump_ifinfo }, + [RTM_GETLINK - RTM_BASE] = { .doit = rtnl_getlink, + .dumpit = rtnl_dump_ifinfo }, [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink }, - [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, - [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, + [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnl_dump_all }, + [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnl_dump_all }, [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add }, [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete }, [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }, @@ -772,7 +765,7 @@ static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] = [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule }, [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule }, #endif - [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all }, + [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnl_dump_all }, [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info }, [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set }, }; -- cgit v1.2.3 From 9067c722cf6930adf1df2d169de9094dd90b0c33 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Mon, 7 Aug 2006 17:57:44 -0700 Subject: [NEIGH]: Move netlink neighbour bits to linux/neighbour.h Moves netlink neighbour bits to linux/neighbour.h. Also moves bits to be exported to userspace from net/neighbour.h to linux/neighbour.h and removes __KERNEL__ guards, userspace is not supposed to be using it. rtnetlink_rcv_msg() is not longer required to parse attributes for the neighbour layer, remove dependency on obsolete and buggy rta_buf. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 93ba04fb8444..78ccbd4c4e37 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -104,7 +104,6 @@ static const int rtm_min[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), - [RTM_FAM(RTM_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)), [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), @@ -121,7 +120,6 @@ static const int rta_max[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, - [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX, [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, -- cgit v1.2.3 From b63bbc5006a0a62fabc81c4f77e95f16ff16f340 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Mon, 7 Aug 2006 18:00:57 -0700 Subject: [NEIGH]: Move netlink neighbour table bits to linux/neighbour.h rtnetlink_rcv_msg() is not longer required to parse attributes for the neighbour tables layer, remove dependency on obsolete and buggy rta_buf. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 78ccbd4c4e37..a1b783a6afc6 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -112,7 +112,6 @@ static const int rtm_min[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), - [RTM_FAM(RTM_NEWNEIGHTBL)] = NLMSG_LENGTH(sizeof(struct ndtmsg)), }; static const int rta_max[RTM_NR_FAMILIES] = @@ -125,7 +124,6 @@ static const int rta_max[RTM_NR_FAMILIES] = [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, - [RTM_FAM(RTM_NEWNEIGHTBL)] = NDTA_MAX, }; void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) -- cgit v1.2.3 From 2942e90050569525628a9f34e0daaa9b661b49cc Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 15 Aug 2006 00:30:25 -0700 Subject: [RTNETLINK]: Use rtnl_unicast() for rtnetlink unicasts Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index a1b783a6afc6..e02fa6a33f42 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -166,6 +166,11 @@ int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo) return err; } +int rtnl_unicast(struct sk_buff *skb, u32 pid) +{ + return nlmsg_unicast(rtnl, skb, pid); +} + int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) { struct rtattr *mx = (struct rtattr*)skb->tail; @@ -574,9 +579,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) goto errout; } - err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).pid, MSG_DONTWAIT); - if (err > 0) - err = 0; + err = rtnl_unicast(skb, NETLINK_CB(skb).pid); errout: kfree(iw_buf); dev_put(dev); @@ -825,3 +828,4 @@ EXPORT_SYMBOL(rtnl); EXPORT_SYMBOL(rtnl_lock); EXPORT_SYMBOL(rtnl_trylock); EXPORT_SYMBOL(rtnl_unlock); +EXPORT_SYMBOL(rtnl_unicast); -- cgit v1.2.3 From 97676b6b5538b3e059d33b8338e7d5cc41c5f1f1 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 15 Aug 2006 00:31:41 -0700 Subject: [RTNETLINK]: Add rtnetlink notification interface Adds rtnl_notify() to send rtnetlink notification messages and rtnl_set_sk_err() to report notification errors as socket errors in order to indicate the need of a resync due to loss of events. nlmsg_report() is added to properly document the meaning of NLM_F_ECHO. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index e02fa6a33f42..2b1af17e6389 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -171,6 +171,22 @@ int rtnl_unicast(struct sk_buff *skb, u32 pid) return nlmsg_unicast(rtnl, skb, pid); } +int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group, + struct nlmsghdr *nlh, gfp_t flags) +{ + int report = 0; + + if (nlh) + report = nlmsg_report(nlh); + + return nlmsg_notify(rtnl, skb, pid, group, report, flags); +} + +void rtnl_set_sk_err(u32 group, int error) +{ + netlink_set_err(rtnl, 0, group, error); +} + int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) { struct rtattr *mx = (struct rtattr*)skb->tail; @@ -829,3 +845,5 @@ EXPORT_SYMBOL(rtnl_lock); EXPORT_SYMBOL(rtnl_trylock); EXPORT_SYMBOL(rtnl_unlock); EXPORT_SYMBOL(rtnl_unicast); +EXPORT_SYMBOL(rtnl_notify); +EXPORT_SYMBOL(rtnl_set_sk_err); -- cgit v1.2.3 From 0ec6d3f467faeec5dd3b617959eb90e9d520113d Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 15 Aug 2006 00:37:09 -0700 Subject: [NET] link: Convert notifications to use rtnl_notify() Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 2b1af17e6389..f5300b5dd0fd 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -630,20 +630,22 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) { struct sk_buff *skb; - int size = NLMSG_SPACE(sizeof(struct ifinfomsg) + - sizeof(struct rtnl_link_ifmap) + - sizeof(struct rtnl_link_stats) + 128); + int err = -ENOBUFS; - skb = nlmsg_new(size, GFP_KERNEL); - if (!skb) - return; + skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (skb == NULL) + goto errout; - if (rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0) < 0) { + err = rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0); + if (err < 0) { kfree_skb(skb); - return; + goto errout; } - NETLINK_CB(skb).dst_group = RTNLGRP_LINK; - netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL); + + err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); +errout: + if (err < 0) + rtnl_set_sk_err(RTNLGRP_LINK, err); } /* Protected by RTNL sempahore. */ -- cgit v1.2.3 From 56fc85ac961e2c20dcb5ef07e2628b3f93de2e49 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 15 Aug 2006 00:37:29 -0700 Subject: [RTNETLINK]: Unexport rtnl socket Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index f5300b5dd0fd..dfc58269240a 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -58,6 +58,7 @@ #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ static DEFINE_MUTEX(rtnl_mutex); +static struct sock *rtnl; void rtnl_lock(void) { @@ -95,8 +96,6 @@ int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len) return 0; } -struct sock *rtnl; - struct rtnetlink_link * rtnetlink_links[NPROTO]; static const int rtm_min[RTM_NR_FAMILIES] = @@ -842,7 +841,6 @@ EXPORT_SYMBOL(rtattr_strlcpy); EXPORT_SYMBOL(rtattr_parse); EXPORT_SYMBOL(rtnetlink_links); EXPORT_SYMBOL(rtnetlink_put_metrics); -EXPORT_SYMBOL(rtnl); EXPORT_SYMBOL(rtnl_lock); EXPORT_SYMBOL(rtnl_trylock); EXPORT_SYMBOL(rtnl_unlock); -- cgit v1.2.3 From 2d7202bfdd28687073f5efef8d2f51bbab0af867 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 22 Aug 2006 00:01:27 -0700 Subject: [IPv6] route: Convert FIB6 dumping to use new netlink api Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index dfc58269240a..eeff0b23e944 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -188,22 +188,27 @@ void rtnl_set_sk_err(u32 group, int error) int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) { - struct rtattr *mx = (struct rtattr*)skb->tail; - int i; + struct nlattr *mx; + int i, valid = 0; + + mx = nla_nest_start(skb, RTA_METRICS); + if (mx == NULL) + return -ENOBUFS; - RTA_PUT(skb, RTA_METRICS, 0, NULL); - for (i=0; irta_len = skb->tail - (u8*)mx; - if (mx->rta_len == RTA_LENGTH(0)) - skb_trim(skb, (u8*)mx - skb->data); - return 0; -rtattr_failure: - skb_trim(skb, (u8*)mx - skb->data); - return -1; + if (!valid) + goto nla_put_failure; + + return nla_nest_end(skb, mx); + +nla_put_failure: + return nla_nest_cancel(skb, mx); } -- cgit v1.2.3 From a57d27fc7107ddcc655ba2812cfebfce3163fd62 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 22 Aug 2006 22:20:14 -0700 Subject: [RTNETLINK]: Don't return error on no-metrics. Instead just cancel the nested attribute and return 0. Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index eeff0b23e944..8f225499e32e 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -202,8 +202,10 @@ int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) } } - if (!valid) - goto nla_put_failure; + if (!valid) { + nla_nest_cancel(skb, mx); + return 0; + } return nla_nest_end(skb, mx); -- cgit v1.2.3 From 5176f91ea83f1a59eba4dba88634a4729d51d1ac Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Sat, 26 Aug 2006 20:13:18 -0700 Subject: [NETLINK]: Make use of NLA_STRING/NLA_NUL_STRING attribute validation Converts existing NLA_STRING attributes to use the new validation features, saving a couple of temporary buffers. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 8f225499e32e..0ebcf8488e99 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -371,8 +371,8 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) } static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = { - [IFLA_IFNAME] = { .type = NLA_STRING }, - [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) }, + [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, + [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, [IFLA_MTU] = { .type = NLA_U32 }, [IFLA_TXQLEN] = { .type = NLA_U32 }, [IFLA_WEIGHT] = { .type = NLA_U32 }, @@ -392,9 +392,8 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) if (err < 0) goto errout; - if (tb[IFLA_IFNAME] && - nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ) >= IFNAMSIZ) - return -EINVAL; + if (tb[IFLA_IFNAME]) + nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); err = -EINVAL; ifm = nlmsg_data(nlh); -- cgit v1.2.3 From 3015d5d4e5b15eddea272a697e83391100581932 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 31 Aug 2006 15:04:30 -0700 Subject: [RTNETLINK]: Fix typo causing wrong skb to be freed A typo introduced by myself which leads to freeing the skb containing the netlink message when it should free the newly allocated skb for the reply. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 0ebcf8488e99..63b882ac288a 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -596,7 +596,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0); if (err <= 0) { - kfree_skb(skb); + kfree_skb(nskb); goto errout; } -- cgit v1.2.3 From 78e5b8916e7db119850f57ce8548fbb9767078fc Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 13 Sep 2006 20:35:36 -0700 Subject: [RTNETLINK]: Fix netdevice name corruption When changing a device by ifindex without including a IFLA_IFNAME attribute, the ifname variable contains random garbage and is used to change the device name. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 63b882ac288a..d8e25e08cb7e 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -394,6 +394,8 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) if (tb[IFLA_IFNAME]) nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); + else + ifname[0] = '\0'; err = -EINVAL; ifm = nlmsg_data(nlh); -- cgit v1.2.3