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Commit 91ed1e66 authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
Browse files

ip/options: explicitly provide net ns to __ip_options_echo() 



__ip_options_echo() uses the current network namespace, and
currently retrives it via skb->dst->dev.

This commit adds an explicit 'net' argument to __ip_options_echo()
and update all the call sites to provide it, usually via a simpler
sock_net().

After this change, __ip_options_echo() no more needs to access
skb->dst and we can drop a couple of hack to preserve such
info in the rx path.

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a1e155ec

include/net/ip.h

+5 −4
Original line number Diff line number Diff line
@@ -567,11 +567,12 @@ int ip_forward(struct sk_buff *skb); 
void ip_options_build(struct sk_buff *skb, struct ip_options *opt,

		      __be32 daddr, struct rtable *rt, int is_frag);



int __ip_options_echo(struct ip_options *dopt, struct sk_buff *skb,

		      const struct ip_options *sopt);

static inline int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb)

int __ip_options_echo(struct net *net, struct ip_options *dopt,

		      struct sk_buff *skb, const struct ip_options *sopt);

static inline int ip_options_echo(struct net *net, struct ip_options *dopt,

				  struct sk_buff *skb)

{

	return __ip_options_echo(dopt, skb, &IPCB(skb)->opt);

	return __ip_options_echo(net, dopt, skb, &IPCB(skb)->opt);

}



void ip_options_fragment(struct sk_buff *skb);

include/net/tcp.h

+3 −2
Original line number Diff line number Diff line
@@ -1885,7 +1885,8 @@ extern void tcp_rack_reo_timeout(struct sock *sk); 
/*

 * Save and compile IPv4 options, return a pointer to it

 */

static inline struct ip_options_rcu *tcp_v4_save_options(struct sk_buff *skb)

static inline struct ip_options_rcu *tcp_v4_save_options(struct net *net,

							 struct sk_buff *skb)

{

	const struct ip_options *opt = &TCP_SKB_CB(skb)->header.h4.opt;

	struct ip_options_rcu *dopt = NULL;
@@ -1894,7 +1895,7 @@ static inline struct ip_options_rcu *tcp_v4_save_options(struct sk_buff *skb) 
		int opt_size = sizeof(*dopt) + opt->optlen;



		dopt = kmalloc(opt_size, GFP_ATOMIC);

		if (dopt && __ip_options_echo(&dopt->opt, skb, opt)) {

		if (dopt && __ip_options_echo(net, &dopt->opt, skb, opt)) {

			kfree(dopt);

			dopt = NULL;

		}

net/ipv4/icmp.c

+2 −2
Original line number Diff line number Diff line
@@ -412,7 +412,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb) 
	int type = icmp_param->data.icmph.type;

	int code = icmp_param->data.icmph.code;



	if (ip_options_echo(&icmp_param->replyopts.opt.opt, skb))

	if (ip_options_echo(net, &icmp_param->replyopts.opt.opt, skb))

		return;



	/* Needed by both icmp_global_allow and icmp_xmit_lock */
@@ -694,7 +694,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info) 
					  iph->tos;

	mark = IP4_REPLY_MARK(net, skb_in->mark);



	if (ip_options_echo(&icmp_param.replyopts.opt.opt, skb_in))

	if (ip_options_echo(net, &icmp_param.replyopts.opt.opt, skb_in))

		goto out_unlock;

net/ipv4/ip_options.c

+3 −3
Original line number Diff line number Diff line
@@ -86,8 +86,8 @@ void ip_options_build(struct sk_buff *skb, struct ip_options *opt, 
 * NOTE: dopt cannot point to skb.

 */



int __ip_options_echo(struct ip_options *dopt, struct sk_buff *skb,

		      const struct ip_options *sopt)

int __ip_options_echo(struct net *net, struct ip_options *dopt,

		      struct sk_buff *skb, const struct ip_options *sopt)

{

	unsigned char *sptr, *dptr;

	int soffset, doffset;
@@ -140,7 +140,7 @@ int __ip_options_echo(struct ip_options *dopt, struct sk_buff *skb, 
						__be32 addr;



						memcpy(&addr, dptr+soffset-1, 4);

						if (inet_addr_type(dev_net(skb_dst(skb)->dev), addr) != RTN_UNICAST) {

						if (inet_addr_type(net, addr) != RTN_UNICAST) {

							dopt->ts_needtime = 1;

							soffset += 8;

						}

net/ipv4/ip_output.c

+1 −1
Original line number Diff line number Diff line
@@ -1525,7 +1525,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb, 
	int err;

	int oif;



	if (__ip_options_echo(&replyopts.opt.opt, skb, sopt))

	if (__ip_options_echo(net, &replyopts.opt.opt, skb, sopt))

		return;



	ipc.addr = daddr;