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rtnl/do_setlink(): notify when a netdev is modified

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Depending on which parameters were updated, the changes were not propagated via
the notifier chain and netlink.

The new flag has been set only when the change did not cause a call to the
notifier chain and/or to the netlink notification functions.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2014-09-01 16:07:29 +02:00 committed by David S. Miller
parent 90c325e3bf
commit ba9989069f
1 changed files with 21 additions and 14 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

35
net/core/rtnetlink.c
View file

@ -1482,6 +1482,8 @@ static int do_set_master(struct net_device *dev, int ifindex)
}
#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 status)
@ -1532,7 +1534,7 @@ static int do_setlink(const struct sk_buff *skb,
if (err < 0)
goto errout;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
if (tb[IFLA_ADDRESS]) {
@ -1564,7 +1566,7 @@ static int do_setlink(const struct sk_buff *skb,
if (tb[IFLA_GROUP]) {
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
/*
@ -1584,7 +1586,7 @@ static int do_setlink(const struct sk_buff *skb,
nla_len(tb[IFLA_IFALIAS]));
if (err < 0)
goto errout;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
if (tb[IFLA_BROADCAST]) {
@ -1616,7 +1618,7 @@ static int do_setlink(const struct sk_buff *skb,
unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
if (dev->tx_queue_len ^ value)
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
dev->tx_queue_len = value;
}
@ -1629,7 +1631,7 @@ static int do_setlink(const struct sk_buff *skb,
write_lock_bh(&dev_base_lock);
if (dev->link_mode ^ value)
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
dev->link_mode = value;
write_unlock_bh(&dev_base_lock);
}
@ -1645,7 +1647,7 @@ static int do_setlink(const struct sk_buff *skb,
err = do_setvfinfo(dev, attr);
if (err < 0)
goto errout;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
}
err = 0;
@ -1675,7 +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;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
}
err = 0;
@ -1693,7 +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;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
if (tb[IFLA_AF_SPEC]) {
@ -1710,15 +1712,20 @@ static int do_setlink(const struct sk_buff *skb,
if (err < 0)
goto errout;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
}
err = 0;
errout:
if (err < 0 && status & DO_SETLINK_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;
}
@ -2015,7 +2022,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
err = ops->changelink(dev, tb, data);
if (err < 0)
return err;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
@ -2026,7 +2033,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
tb, slave_data);
if (err < 0)
return err;
status |= DO_SETLINK_MODIFIED;
status |= DO_SETLINK_NOTIFY;
}
return do_setlink(skb, dev, ifm, tb, ifname, status);