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authorThomas Graf <tgraf@suug.ch>2007-03-22 23:28:46 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:27:29 -0700
commitd35b685640aeb39eb4f5e98c75e8e001e406f9a3 (patch)
treec3ec38a2fb54a3783dd9c764bf58be68557f9396 /net/netlink
parent33a0543cd9e090d2c6759e0ed85c3049c6efcc06 (diff)
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[NETLINK]: Ignore !NLM_F_REQUEST messages directly in netlink_run_queue()
netlink_rcv_skb() is changed to skip messages which don't have the NLM_F_REQUEST bit to avoid every netlink family having to perform this check on their own. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/af_netlink.c10
-rw-r--r--net/netlink/genetlink.c3
2 files changed, 8 insertions, 5 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 8488c15f2643..7b455980e9bf 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1470,10 +1470,15 @@ static int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
while (skb->len >= nlmsg_total_size(0)) {
nlh = nlmsg_hdr(skb);
+ err = 0;
if (nlh->nlmsg_len < NLMSG_HDRLEN || skb->len < nlh->nlmsg_len)
return 0;
+ /* Only requests are handled by the kernel */
+ if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
+ goto skip;
+
if (cb(skb, nlh, &err) < 0) {
/* Not an error, but we have to interrupt processing
* here. Note: that in this case we do not pull
@@ -1481,9 +1486,10 @@ static int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
*/
if (err == 0)
return -1;
+ }
+skip:
+ if (nlh->nlmsg_flags & NLM_F_ACK || err)
netlink_ack(skb, nlh, err);
- } else if (nlh->nlmsg_flags & NLM_F_ACK)
- netlink_ack(skb, nlh, 0);
netlink_queue_skip(nlh, skb);
}
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index c2996794eb25..039516f6cd80 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -304,9 +304,6 @@ static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
struct genlmsghdr *hdr = nlmsg_data(nlh);
int hdrlen, err = -EINVAL;
- if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
- goto ignore;
-
if (nlh->nlmsg_type < NLMSG_MIN_TYPE)
goto ignore;