Commit 0ab6803b authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
Browse files

[IPV6] address: Convert address dumping to new netlink api 



Replaces INET6_IFADDR_RTA_SPACE with a new function calculating
the total required message size for all address messages.

Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 101bb229

net/ipv6/addrconf.c

+33 −46
Original line number Diff line number Diff line
@@ -3040,23 +3040,27 @@ static inline int rt_scope(int ifa_scope) 
		return RT_SCOPE_UNIVERSE;

}



/* Maximum length of ifa_cacheinfo attributes */

#define INET6_IFADDR_RTA_SPACE \

		RTA_SPACE(16) /* IFA_ADDRESS */ + \

		RTA_SPACE(sizeof(struct ifa_cacheinfo)) /* CACHEINFO */

static inline int inet6_ifaddr_msgsize(void)

{

	return nlmsg_total_size(sizeof(struct ifaddrmsg) +

				nla_total_size(16) +

				nla_total_size(sizeof(struct ifa_cacheinfo)) +

				128);

}



static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,

			     u32 pid, u32 seq, int event, unsigned int flags)

{

	struct nlmsghdr  *nlh;

	unsigned char	 *b = skb->tail;

	u32 preferred, valid;



	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	if (nlh == NULL)

		return -ENOBUFS;



	put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),

		      ifa->idev->dev->ifindex);



	RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);

	if (!(ifa->flags&IFA_F_PERMANENT)) {

		preferred = ifa->prefered_lft;

		valid = ifa->valid_lft;
@@ -3071,72 +3075,57 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, 
		valid = INFINITY_LIFE_TIME;

	}



	if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)

		goto rtattr_failure;

	if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||

	    put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)

		return nlmsg_cancel(skb, nlh);



	nlh->nlmsg_len = skb->tail - b;

	return skb->len;



nlmsg_failure:

rtattr_failure:

	skb_trim(skb, b - skb->data);

	return -1;

	return nlmsg_end(skb, nlh);

}



static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,

				u32 pid, u32 seq, int event, u16 flags)

{

	struct nlmsghdr  *nlh;

	unsigned char	 *b = skb->tail;

	u8 scope = RT_SCOPE_UNIVERSE;

	int ifindex = ifmca->idev->dev->ifindex;



	if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)

		scope = RT_SCOPE_SITE;



	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);

	RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);

	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	if (nlh == NULL)

		return -ENOBUFS;



	if (put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,

	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);

	if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||

	    put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,

			  INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)

		goto rtattr_failure;



	nlh->nlmsg_len = skb->tail - b;

	return skb->len;

		return nlmsg_cancel(skb, nlh);



nlmsg_failure:

rtattr_failure:

	skb_trim(skb, b - skb->data);

	return -1;

	return nlmsg_end(skb, nlh);

}



static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,

				u32 pid, u32 seq, int event, unsigned int flags)

{

	struct nlmsghdr  *nlh;

	unsigned char	 *b = skb->tail;

	u8 scope = RT_SCOPE_UNIVERSE;

	int ifindex = ifaca->aca_idev->dev->ifindex;



	if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)

		scope = RT_SCOPE_SITE;



	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);

	RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);

	nlh = nlmsg_put(skb, pid, seq, event, sizeof(struct ifaddrmsg), flags);

	if (nlh == NULL)

		return -ENOBUFS;



	if (put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,

	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);

	if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||

	    put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,

			  INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0)

		goto rtattr_failure;

		return nlmsg_cancel(skb, nlh);



	nlh->nlmsg_len = skb->tail - b;

	return skb->len;



nlmsg_failure:

rtattr_failure:

	skb_trim(skb, b - skb->data);

	return -1;

	return nlmsg_end(skb, nlh);

}



enum addr_type_t
@@ -3256,7 +3245,6 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, 
	struct net_device *dev = NULL;

	struct inet6_ifaddr *ifa;

	struct sk_buff *skb;

	int payload = sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE;

	int err;



	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
@@ -3278,7 +3266,7 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh, 
		goto errout;

	}



	if ((skb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL)) == NULL) {

	if ((skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL)) == NULL) {

		err = -ENOBUFS;

		goto errout_ifa;

	}
@@ -3300,10 +3288,9 @@ errout: 
static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)

{

	struct sk_buff *skb;

	int payload = sizeof(struct ifaddrmsg) + INET6_IFADDR_RTA_SPACE;

	int err = -ENOBUFS;



	skb = nlmsg_new(nlmsg_total_size(payload), GFP_ATOMIC);

	skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);

	if (skb == NULL)

		goto errout;

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