Commit 86298285 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David S. Miller
Browse files

net/ipv6: switch ipv6_flowlabel_opt to sockptr_t 



Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.

Note that the get case is pretty weird in that it actually copies data
back to userspace from setsockopt.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ff6a4cf2

include/net/ipv6.h

+1 −1
Original line number Diff line number Diff line
@@ -406,7 +406,7 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, 
					 struct ip6_flowlabel *fl,

					 struct ipv6_txoptions *fopt);

void fl6_free_socklist(struct sock *sk);

int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);

int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen);

int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,

			   int flags);

int ip6_flowlabel_init(void);

net/ipv6/ip6_flowlabel.c

+9 −7
Original line number Diff line number Diff line
@@ -371,7 +371,7 @@ static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned lo 


static struct ip6_flowlabel *

fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq,

	  char __user *optval, int optlen, int *err_p)

	  sockptr_t optval, int optlen, int *err_p)

{

	struct ip6_flowlabel *fl = NULL;

	int olen;
@@ -401,7 +401,8 @@ fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq, 
		memset(fl->opt, 0, sizeof(*fl->opt));

		fl->opt->tot_len = sizeof(*fl->opt) + olen;

		err = -EFAULT;

		if (copy_from_user(fl->opt+1, optval+CMSG_ALIGN(sizeof(*freq)), olen))

		sockptr_advance(optval, CMSG_ALIGN(sizeof(*freq)));

		if (copy_from_sockptr(fl->opt + 1, optval, olen))

			goto done;



		msg.msg_controllen = olen;
@@ -604,7 +605,7 @@ static int ipv6_flowlabel_renew(struct sock *sk, struct in6_flowlabel_req *freq) 
}



static int ipv6_flowlabel_get(struct sock *sk, struct in6_flowlabel_req *freq,

		void __user *optval, int optlen)

		sockptr_t optval, int optlen)

{

	struct ipv6_fl_socklist *sfl, *sfl1 = NULL;

	struct ip6_flowlabel *fl, *fl1 = NULL;
@@ -702,8 +703,9 @@ release: 
		goto recheck;



	if (!freq->flr_label) {

		if (copy_to_user(&((struct in6_flowlabel_req __user *) optval)->flr_label,

				 &fl->label, sizeof(fl->label))) {

		sockptr_advance(optval,

				offsetof(struct in6_flowlabel_req, flr_label));

		if (copy_to_sockptr(optval, &fl->label, sizeof(fl->label))) {

			/* Intentionally ignore fault. */

		}

	}
@@ -716,13 +718,13 @@ done: 
	return err;

}



int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)

int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen)

{

	struct in6_flowlabel_req freq;



	if (optlen < sizeof(freq))

		return -EINVAL;

	if (copy_from_user(&freq, optval, sizeof(freq)))

	if (copy_from_sockptr(&freq, optval, sizeof(freq)))

		return -EFAULT;



	switch (freq.flr_action) {

net/ipv6/ipv6_sockglue.c

+1 −1
Original line number Diff line number Diff line
@@ -929,7 +929,7 @@ done: 
		retv = 0;

		break;

	case IPV6_FLOWLABEL_MGR:

		retv = ipv6_flowlabel_opt(sk, optval, optlen);

		retv = ipv6_flowlabel_opt(sk, USER_SOCKPTR(optval), optlen);

		break;

	case IPV6_IPSEC_POLICY:

	case IPV6_XFRM_POLICY:

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