diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index f0493e3b7471099f0245b0ea0c4b52de4a03034f..a6882686ca3a10fc3be7ced6299dc7385ffd239d 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1481,9 +1481,12 @@ static int do_set_master(struct net_device *dev, int ifindex) return 0; } +#define DO_SETLINK_MODIFIED 0x01 +/* notify flag means notify + modified. */ +#define DO_SETLINK_NOTIFY 0x03 static int do_setlink(const struct sk_buff *skb, struct net_device *dev, struct ifinfomsg *ifm, - struct nlattr **tb, char *ifname, int modified) + struct nlattr **tb, char *ifname, int status) { const struct net_device_ops *ops = dev->netdev_ops; int err; @@ -1502,7 +1505,7 @@ static int do_setlink(const struct sk_buff *skb, put_net(net); if (err) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } if (tb[IFLA_MAP]) { @@ -1531,7 +1534,7 @@ static int do_setlink(const struct sk_buff *skb, if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } if (tb[IFLA_ADDRESS]) { @@ -1551,19 +1554,19 @@ static int do_setlink(const struct sk_buff *skb, kfree(sa); if (err) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } if (tb[IFLA_MTU]) { err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } if (tb[IFLA_GROUP]) { dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); - modified = 1; + status |= DO_SETLINK_NOTIFY; } /* @@ -1575,7 +1578,7 @@ static int do_setlink(const struct sk_buff *skb, err = dev_change_name(dev, ifname); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } if (tb[IFLA_IFALIAS]) { @@ -1583,7 +1586,7 @@ static int do_setlink(const struct sk_buff *skb, nla_len(tb[IFLA_IFALIAS])); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } if (tb[IFLA_BROADCAST]) { @@ -1601,25 +1604,35 @@ static int do_setlink(const struct sk_buff *skb, err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); if (err) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } if (tb[IFLA_CARRIER]) { err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); if (err) goto errout; - modified = 1; + status |= DO_SETLINK_MODIFIED; } - if (tb[IFLA_TXQLEN]) - dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); + if (tb[IFLA_TXQLEN]) { + unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); + + if (dev->tx_queue_len ^ value) + status |= DO_SETLINK_NOTIFY; + + dev->tx_queue_len = value; + } if (tb[IFLA_OPERSTATE]) set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); if (tb[IFLA_LINKMODE]) { + unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); + write_lock_bh(&dev_base_lock); - dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); + if (dev->link_mode ^ value) + status |= DO_SETLINK_NOTIFY; + dev->link_mode = value; write_unlock_bh(&dev_base_lock); } @@ -1634,7 +1647,7 @@ static int do_setlink(const struct sk_buff *skb, err = do_setvfinfo(dev, attr); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } } err = 0; @@ -1664,7 +1677,7 @@ static int do_setlink(const struct sk_buff *skb, err = ops->ndo_set_vf_port(dev, vf, port); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } } err = 0; @@ -1682,7 +1695,7 @@ static int do_setlink(const struct sk_buff *skb, err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } if (tb[IFLA_AF_SPEC]) { @@ -1699,15 +1712,20 @@ static int do_setlink(const struct sk_buff *skb, if (err < 0) goto errout; - modified = 1; + status |= DO_SETLINK_NOTIFY; } } err = 0; errout: - if (err < 0 && modified) - net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n", - dev->name); + if (status & DO_SETLINK_MODIFIED) { + if (status & DO_SETLINK_NOTIFY) + netdev_state_change(dev); + + if (err < 0) + net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n", + dev->name); + } return err; } @@ -1989,7 +2007,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) } if (dev) { - int modified = 0; + int status = 0; if (nlh->nlmsg_flags & NLM_F_EXCL) return -EEXIST; @@ -2004,7 +2022,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) err = ops->changelink(dev, tb, data); if (err < 0) return err; - modified = 1; + status |= DO_SETLINK_NOTIFY; } if (linkinfo[IFLA_INFO_SLAVE_DATA]) { @@ -2015,10 +2033,10 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) tb, slave_data); if (err < 0) return err; - modified = 1; + status |= DO_SETLINK_NOTIFY; } - return do_setlink(skb, dev, ifm, tb, ifname, modified); + return do_setlink(skb, dev, ifm, tb, ifname, status); } if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {