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| author | Thomas Graf <tgraf@suug.ch> | 2007-07-22 12:43:32 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:47:42 -0700 |
| commit | 744b096e2b0976a10ae9a66aa6a3ae7fa4fce9f1 (patch) | |
| tree | 904de2fb66b8eb2d497fbb1cde8b2ffb6dd1a243 /net/wireless | |
| parent | 1bec3f1a3ec5d922d1040c7845b82cd496c02d90 (diff) | |
| download | linux-744b096e2b0976a10ae9a66aa6a3ae7fa4fce9f1.tar.bz2 | |
[WIRELESS]: Use type safe netlink interface
Makes use of the type safe netlink interface and adds a warning
if the message is too big for NLMSG_DEFAULT_SIZE to help debug.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/wext.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/net/wireless/wext.c b/net/wireless/wext.c index d6aaf65192e9..debf5191a128 100644 --- a/net/wireless/wext.c +++ b/net/wireless/wext.c @@ -1129,10 +1129,12 @@ static int rtnetlink_fill_iwinfo(struct sk_buff *skb, struct net_device *dev, { struct ifinfomsg *r; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); - nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r)); - r = NLMSG_DATA(nlh); + nlh = nlmsg_put(skb, 0, 0, type, sizeof(*r), 0); + if (nlh == NULL) + return -EMSGSIZE; + + r = nlmsg_data(nlh); r->ifi_family = AF_UNSPEC; r->__ifi_pad = 0; r->ifi_type = dev->type; @@ -1141,15 +1143,13 @@ static int rtnetlink_fill_iwinfo(struct sk_buff *skb, struct net_device *dev, r->ifi_change = 0; /* Wireless changes don't affect those flags */ /* Add the wireless events in the netlink packet */ - RTA_PUT(skb, IFLA_WIRELESS, event_len, event); + NLA_PUT(skb, IFLA_WIRELESS, event_len, event); - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); -nlmsg_failure: -rtattr_failure: - nlmsg_trim(skb, b); - return -1; +nla_put_failure: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } /* ---------------------------------------------------------------- */ @@ -1162,17 +1162,19 @@ rtattr_failure: static void rtmsg_iwinfo(struct net_device *dev, char *event, int event_len) { struct sk_buff *skb; - int size = NLMSG_GOODSIZE; + int err; - skb = alloc_skb(size, GFP_ATOMIC); + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!skb) return; - if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK, - event, event_len) < 0) { + err = rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK, event, event_len); + if (err < 0) { + WARN_ON(err == -EMSGSIZE); kfree_skb(skb); return; } + NETLINK_CB(skb).dst_group = RTNLGRP_LINK; skb_queue_tail(&wireless_nlevent_queue, skb); tasklet_schedule(&wireless_nlevent_tasklet); |