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authorJohannes Berg <johannes.berg@intel.com>2017-06-16 14:29:21 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-16 11:48:39 -0400
commit4df864c1d9afb46e2461a9f808d9f11a42d31bad (patch)
tree07e7b3d16b161e0d199c5b8116df277798566e4f /net/ipv6
parent59ae1d127ac0ae404baf414c434ba2651b793f46 (diff)
networking: make skb_put & friends return void pointers
It seems like a historic accident that these return unsigned char *, and in many places that means casts are required, more often than not. Make these functions (skb_put, __skb_put and pskb_put) return void * and remove all the casts across the tree, adding a (u8 *) cast only where the unsigned char pointer was used directly, all done with the following spatch: @@ expression SKB, LEN; typedef u8; identifier fn = { skb_put, __skb_put }; @@ - *(fn(SKB, LEN)) + *(u8 *)fn(SKB, LEN) @@ expression E, SKB, LEN; identifier fn = { skb_put, __skb_put }; type T; @@ - E = ((T *)(fn(SKB, LEN))) + E = fn(SKB, LEN) which actually doesn't cover pskb_put since there are only three users overall. A handful of stragglers were converted manually, notably a macro in drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many instances in net/bluetooth/hci_sock.c. In the former file, I also had to fix one whitespace problem spatch introduced. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/mcast.c4
-rw-r--r--net/ipv6/ndisc.c8
-rw-r--r--net/ipv6/netfilter/ip6t_SYNPROXY.c10
-rw-r--r--net/ipv6/netfilter/nf_reject_ipv6.c2
4 files changed, 12 insertions, 12 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index b64046ccae69..e2221135858b 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1692,7 +1692,7 @@ static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
skb = mld_newpack(pmc->idev, dev->mtu);
if (!skb)
return NULL;
- pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
+ pgr = skb_put(skb, sizeof(struct mld2_grec));
pgr->grec_type = type;
pgr->grec_auxwords = 0;
pgr->grec_nsrcs = 0;
@@ -1784,7 +1784,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
}
if (!skb)
return NULL;
- psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
+ psrc = skb_put(skb, sizeof(*psrc));
*psrc = psf->sf_addr;
scount++; stotal++;
if ((type == MLD2_ALLOW_NEW_SOURCES ||
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index d310dc41209a..0327c1f2e6fc 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -528,7 +528,7 @@ void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
if (!skb)
return;
- msg = (struct nd_msg *)skb_put(skb, sizeof(*msg));
+ msg = skb_put(skb, sizeof(*msg));
*msg = (struct nd_msg) {
.icmph = {
.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT,
@@ -597,7 +597,7 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
if (!skb)
return;
- msg = (struct nd_msg *)skb_put(skb, sizeof(*msg));
+ msg = skb_put(skb, sizeof(*msg));
*msg = (struct nd_msg) {
.icmph = {
.icmp6_type = NDISC_NEIGHBOUR_SOLICITATION,
@@ -657,7 +657,7 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
if (!skb)
return;
- msg = (struct rs_msg *)skb_put(skb, sizeof(*msg));
+ msg = skb_put(skb, sizeof(*msg));
*msg = (struct rs_msg) {
.icmph = {
.icmp6_type = NDISC_ROUTER_SOLICITATION,
@@ -1633,7 +1633,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
if (!buff)
goto release;
- msg = (struct rd_msg *)skb_put(buff, sizeof(*msg));
+ msg = skb_put(buff, sizeof(*msg));
*msg = (struct rd_msg) {
.icmph = {
.icmp6_type = NDISC_REDIRECT,
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index d3c4daa708b9..ce203dd729e0 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -27,7 +27,7 @@ synproxy_build_ip(struct net *net, struct sk_buff *skb,
struct ipv6hdr *iph;
skb_reset_network_header(skb);
- iph = (struct ipv6hdr *)skb_put(skb, sizeof(*iph));
+ iph = skb_put(skb, sizeof(*iph));
ip6_flow_hdr(iph, 0, 0);
iph->hop_limit = net->ipv6.devconf_all->hop_limit;
iph->nexthdr = IPPROTO_TCP;
@@ -105,7 +105,7 @@ synproxy_send_client_synack(struct net *net,
niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
skb_reset_transport_header(nskb);
- nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
+ nth = skb_put(nskb, tcp_hdr_size);
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(__cookie_v6_init_sequence(iph, th, &mss));
@@ -147,7 +147,7 @@ synproxy_send_server_syn(struct net *net,
niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
skb_reset_transport_header(nskb);
- nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
+ nth = skb_put(nskb, tcp_hdr_size);
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(recv_seq - 1);
@@ -192,7 +192,7 @@ synproxy_send_server_ack(struct net *net,
niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
skb_reset_transport_header(nskb);
- nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
+ nth = skb_put(nskb, tcp_hdr_size);
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(ntohl(th->ack_seq));
@@ -230,7 +230,7 @@ synproxy_send_client_ack(struct net *net,
niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
skb_reset_transport_header(nskb);
- nth = (struct tcphdr *)skb_put(nskb, tcp_hdr_size);
+ nth = skb_put(nskb, tcp_hdr_size);
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(ntohl(th->seq) + 1);
diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
index f63b18e05c69..24858402e374 100644
--- a/net/ipv6/netfilter/nf_reject_ipv6.c
+++ b/net/ipv6/netfilter/nf_reject_ipv6.c
@@ -95,7 +95,7 @@ void nf_reject_ip6_tcphdr_put(struct sk_buff *nskb,
int needs_ack;
skb_reset_transport_header(nskb);
- tcph = (struct tcphdr *)skb_put(nskb, sizeof(struct tcphdr));
+ tcph = skb_put(nskb, sizeof(struct tcphdr));
/* Truncate to length (no data) */
tcph->doff = sizeof(struct tcphdr)/4;
tcph->source = oth->dest;