net: Add extack to nlmsg_parse

Make sure extack is passed to nlmsg_parse where easy to do so.
Most of these are dump handlers and leveraging the extack in
the netlink_callback.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Christian Brauner <christian@brauner.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/devlink.c

@@ -3504,7 +3504,7 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
 	start_offset = *((u64 *)&cb->args[0]);
 
 	err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
-			  attrs, DEVLINK_ATTR_MAX, ops->policy, NULL);
+			  attrs, DEVLINK_ATTR_MAX, ops->policy, cb->extack);
 	if (err)
 		goto out;
 

net/core/neighbour.c

@@ -2445,7 +2445,8 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
 	    ((struct ndmsg *)nlmsg_data(nlh))->ndm_flags == NTF_PROXY)
 		proxy = 1;
 
-	err = nlmsg_parse(nlh, sizeof(struct ndmsg), tb, NDA_MAX, NULL, NULL);
+	err = nlmsg_parse(nlh, sizeof(struct ndmsg), tb, NDA_MAX, NULL,
+			  cb->extack);
 	if (!err) {
 		if (tb[NDA_IFINDEX]) {
 			if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))

net/core/rtnetlink.c

@@ -1909,7 +1909,7 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
 
 	if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
-			ifla_policy, NULL) >= 0) {
+			ifla_policy, cb->extack) >= 0) {
 		if (tb[IFLA_TARGET_NETNSID]) {
 			netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
 			tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
@@ -3774,7 +3774,7 @@ static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
 	    (nlmsg_len(cb->nlh) != sizeof(struct ndmsg) +
 	     nla_attr_size(sizeof(u32)))) {
 		err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
-				  IFLA_MAX, ifla_policy, NULL);
+				  IFLA_MAX, ifla_policy, cb->extack);
 		if (err < 0) {
 			return -EINVAL;
 		} else if (err == 0) {

net/ipv4/devinet.c

@@ -782,7 +782,8 @@ static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft,
 }
 
 static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
-				       __u32 *pvalid_lft, __u32 *pprefered_lft)
+				       __u32 *pvalid_lft, __u32 *pprefered_lft,
+				       struct netlink_ext_ack *extack)
 {
 	struct nlattr *tb[IFA_MAX+1];
 	struct in_ifaddr *ifa;
@@ -792,7 +793,7 @@ static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
 	int err;
 
 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy,
-			  NULL);
+			  extack);
 	if (err < 0)
 		goto errout;
 
@@ -897,7 +898,7 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 	ASSERT_RTNL();
 
-	ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft);
+	ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft, extack);
 	if (IS_ERR(ifa))
 		return PTR_ERR(ifa);
 
@@ -1684,7 +1685,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 	s_ip_idx = ip_idx = cb->args[2];
 
 	if (nlmsg_parse(cb->nlh, sizeof(struct ifaddrmsg), tb, IFA_MAX,
-			ifa_ipv4_policy, NULL) >= 0) {
+			ifa_ipv4_policy, cb->extack) >= 0) {
 		if (tb[IFA_TARGET_NETNSID]) {
 			fillargs.netnsid = nla_get_s32(tb[IFA_TARGET_NETNSID]);
 

net/ipv6/addrconf.c

@@ -5021,7 +5021,7 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
 	s_ip_idx = ip_idx = cb->args[2];
 
 	if (nlmsg_parse(cb->nlh, sizeof(struct ifaddrmsg), tb, IFA_MAX,
-			ifa_ipv6_policy, NULL) >= 0) {
+			ifa_ipv6_policy, cb->extack) >= 0) {
 		if (tb[IFA_TARGET_NETNSID]) {
 			netnsid = nla_get_s32(tb[IFA_TARGET_NETNSID]);
 

net/ipv6/route.c

@@ -4117,7 +4117,7 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 	int err;
 
 	err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy,
-			  NULL);
+			  extack);
 	if (err < 0)
 		goto errout;
 

net/mpls/af_mpls.c

@@ -1223,7 +1223,7 @@ static int mpls_netconf_get_devconf(struct sk_buff *in_skb,
 	int err;
 
 	err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
-			  devconf_mpls_policy, NULL);
+			  devconf_mpls_policy, extack);
 	if (err < 0)
 		goto errout;
 

net/netfilter/ipvs/ip_vs_ctl.c

@@ -3234,7 +3234,7 @@ static int ip_vs_genl_dump_dests(struct sk_buff *skb,
 
 	/* Try to find the service for which to dump destinations */
 	if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX,
-			ip_vs_cmd_policy, NULL))
+			ip_vs_cmd_policy, cb->extack))
 		goto out_err;
 
 

net/sched/act_api.c

@@ -1452,7 +1452,7 @@ static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 	u32 act_count = 0;
 
 	ret = nlmsg_parse(cb->nlh, sizeof(struct tcamsg), tb, TCA_ROOT_MAX,
-			  tcaa_policy, NULL);
+			  tcaa_policy, cb->extack);
 	if (ret < 0)
 		return ret;
 

net/sched/cls_api.c

@@ -1727,7 +1727,8 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb)
 	if (nlmsg_len(cb->nlh) < sizeof(*tcm))
 		return skb->len;
 
-	err = nlmsg_parse(cb->nlh, sizeof(*tcm), tca, TCA_MAX, NULL, NULL);
+	err = nlmsg_parse(cb->nlh, sizeof(*tcm), tca, TCA_MAX, NULL,
+			  cb->extack);
 	if (err)
 		return err;
 
@@ -2054,7 +2055,8 @@ static int tc_dump_chain(struct sk_buff *skb, struct netlink_callback *cb)
 	if (nlmsg_len(cb->nlh) < sizeof(*tcm))
 		return skb->len;
 
-	err = nlmsg_parse(cb->nlh, sizeof(*tcm), tca, TCA_MAX, NULL, NULL);
+	err = nlmsg_parse(cb->nlh, sizeof(*tcm), tca, TCA_MAX, NULL,
+			  cb->extack);
 	if (err)
 		return err;
 

net/sched/sch_api.c

@@ -1671,7 +1671,7 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
 	ASSERT_RTNL();
 
 	err = nlmsg_parse(nlh, sizeof(struct tcmsg), tca, TCA_MAX,
-			  rtm_tca_policy, NULL);
+			  rtm_tca_policy, cb->extack);
 	if (err < 0)
 		return err;
 

net/xfrm/xfrm_user.c

@@ -1007,7 +1007,7 @@ static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
 		int err;
 
 		err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
-				  NULL);
+				  cb->extack);
 		if (err < 0)
 			return err;