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Commit ca860fb3 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
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[NEIGH]: Convert neighbour table dumping to new netlink api 



Also fixes skipping of already dumped neighbours.

Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6b3f8674

net/core/neighbour.c

+74 −67
Original line number Diff line number Diff line
@@ -1597,56 +1597,59 @@ int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 


static int neightbl_fill_parms(struct sk_buff *skb, struct neigh_parms *parms)

{

	struct rtattr *nest = NULL;

	struct nlattr *nest;



	nest = RTA_NEST(skb, NDTA_PARMS);

	nest = nla_nest_start(skb, NDTA_PARMS);

	if (nest == NULL)

		return -ENOBUFS;



	if (parms->dev)

		RTA_PUT_U32(skb, NDTPA_IFINDEX, parms->dev->ifindex);



	RTA_PUT_U32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt));

	RTA_PUT_U32(skb, NDTPA_QUEUE_LEN, parms->queue_len);

	RTA_PUT_U32(skb, NDTPA_PROXY_QLEN, parms->proxy_qlen);

	RTA_PUT_U32(skb, NDTPA_APP_PROBES, parms->app_probes);

	RTA_PUT_U32(skb, NDTPA_UCAST_PROBES, parms->ucast_probes);

	RTA_PUT_U32(skb, NDTPA_MCAST_PROBES, parms->mcast_probes);

	RTA_PUT_MSECS(skb, NDTPA_REACHABLE_TIME, parms->reachable_time);

	RTA_PUT_MSECS(skb, NDTPA_BASE_REACHABLE_TIME,

		NLA_PUT_U32(skb, NDTPA_IFINDEX, parms->dev->ifindex);



	NLA_PUT_U32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt));

	NLA_PUT_U32(skb, NDTPA_QUEUE_LEN, parms->queue_len);

	NLA_PUT_U32(skb, NDTPA_PROXY_QLEN, parms->proxy_qlen);

	NLA_PUT_U32(skb, NDTPA_APP_PROBES, parms->app_probes);

	NLA_PUT_U32(skb, NDTPA_UCAST_PROBES, parms->ucast_probes);

	NLA_PUT_U32(skb, NDTPA_MCAST_PROBES, parms->mcast_probes);

	NLA_PUT_MSECS(skb, NDTPA_REACHABLE_TIME, parms->reachable_time);

	NLA_PUT_MSECS(skb, NDTPA_BASE_REACHABLE_TIME,

		      parms->base_reachable_time);

	RTA_PUT_MSECS(skb, NDTPA_GC_STALETIME, parms->gc_staletime);

	RTA_PUT_MSECS(skb, NDTPA_DELAY_PROBE_TIME, parms->delay_probe_time);

	RTA_PUT_MSECS(skb, NDTPA_RETRANS_TIME, parms->retrans_time);

	RTA_PUT_MSECS(skb, NDTPA_ANYCAST_DELAY, parms->anycast_delay);

	RTA_PUT_MSECS(skb, NDTPA_PROXY_DELAY, parms->proxy_delay);

	RTA_PUT_MSECS(skb, NDTPA_LOCKTIME, parms->locktime);

	NLA_PUT_MSECS(skb, NDTPA_GC_STALETIME, parms->gc_staletime);

	NLA_PUT_MSECS(skb, NDTPA_DELAY_PROBE_TIME, parms->delay_probe_time);

	NLA_PUT_MSECS(skb, NDTPA_RETRANS_TIME, parms->retrans_time);

	NLA_PUT_MSECS(skb, NDTPA_ANYCAST_DELAY, parms->anycast_delay);

	NLA_PUT_MSECS(skb, NDTPA_PROXY_DELAY, parms->proxy_delay);

	NLA_PUT_MSECS(skb, NDTPA_LOCKTIME, parms->locktime);



	return RTA_NEST_END(skb, nest);

	return nla_nest_end(skb, nest);



rtattr_failure:

	return RTA_NEST_CANCEL(skb, nest);

nla_put_failure:

	return nla_nest_cancel(skb, nest);

}



static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb,

			      struct netlink_callback *cb)

static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl,

			      u32 pid, u32 seq, int type, int flags)

{

	struct nlmsghdr *nlh;

	struct ndtmsg *ndtmsg;



	nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWNEIGHTBL, sizeof(struct ndtmsg),

			       NLM_F_MULTI);

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);

	if (nlh == NULL)

		return -ENOBUFS;



	ndtmsg = NLMSG_DATA(nlh);

	ndtmsg = nlmsg_data(nlh);



	read_lock_bh(&tbl->lock);

	ndtmsg->ndtm_family = tbl->family;

	ndtmsg->ndtm_pad1   = 0;

	ndtmsg->ndtm_pad2   = 0;



	RTA_PUT_STRING(skb, NDTA_NAME, tbl->id);

	RTA_PUT_MSECS(skb, NDTA_GC_INTERVAL, tbl->gc_interval);

	RTA_PUT_U32(skb, NDTA_THRESH1, tbl->gc_thresh1);

	RTA_PUT_U32(skb, NDTA_THRESH2, tbl->gc_thresh2);

	RTA_PUT_U32(skb, NDTA_THRESH3, tbl->gc_thresh3);

	NLA_PUT_STRING(skb, NDTA_NAME, tbl->id);

	NLA_PUT_MSECS(skb, NDTA_GC_INTERVAL, tbl->gc_interval);

	NLA_PUT_U32(skb, NDTA_THRESH1, tbl->gc_thresh1);

	NLA_PUT_U32(skb, NDTA_THRESH2, tbl->gc_thresh2);

	NLA_PUT_U32(skb, NDTA_THRESH3, tbl->gc_thresh3);



	{

		unsigned long now = jiffies;
@@ -1665,7 +1668,7 @@ static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb, 
			.ndtc_proxy_qlen	= tbl->proxy_queue.qlen,

		};



		RTA_PUT(skb, NDTA_CONFIG, sizeof(ndc), &ndc);

		NLA_PUT(skb, NDTA_CONFIG, sizeof(ndc), &ndc);

	}



	{
@@ -1690,55 +1693,50 @@ static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb, 
			ndst.ndts_forced_gc_runs	+= st->forced_gc_runs;

		}



		RTA_PUT(skb, NDTA_STATS, sizeof(ndst), &ndst);

		NLA_PUT(skb, NDTA_STATS, sizeof(ndst), &ndst);

	}



	BUG_ON(tbl->parms.dev);

	if (neightbl_fill_parms(skb, &tbl->parms) < 0)

		goto rtattr_failure;

		goto nla_put_failure;



	read_unlock_bh(&tbl->lock);

	return NLMSG_END(skb, nlh);

	return nlmsg_end(skb, nlh);



rtattr_failure:

nla_put_failure:

	read_unlock_bh(&tbl->lock);

	return NLMSG_CANCEL(skb, nlh);

 

nlmsg_failure:

	return -1;

	return nlmsg_cancel(skb, nlh);

}



static int neightbl_fill_param_info(struct neigh_table *tbl,

static int neightbl_fill_param_info(struct sk_buff *skb,

				    struct neigh_table *tbl,

				    struct neigh_parms *parms,

				    struct sk_buff *skb,

				    struct netlink_callback *cb)

				    u32 pid, u32 seq, int type,

				    unsigned int flags)

{

	struct ndtmsg *ndtmsg;

	struct nlmsghdr *nlh;



	nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWNEIGHTBL, sizeof(struct ndtmsg),

			       NLM_F_MULTI);

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);

	if (nlh == NULL)

		return -ENOBUFS;



	ndtmsg = NLMSG_DATA(nlh);

	ndtmsg = nlmsg_data(nlh);



	read_lock_bh(&tbl->lock);

	ndtmsg->ndtm_family = tbl->family;

	ndtmsg->ndtm_pad1   = 0;

	ndtmsg->ndtm_pad2   = 0;

	RTA_PUT_STRING(skb, NDTA_NAME, tbl->id);



	if (neightbl_fill_parms(skb, parms) < 0)

		goto rtattr_failure;

	if (nla_put_string(skb, NDTA_NAME, tbl->id) < 0 ||

	    neightbl_fill_parms(skb, parms) < 0)

		goto errout;



	read_unlock_bh(&tbl->lock);

	return NLMSG_END(skb, nlh);



rtattr_failure:

	return nlmsg_end(skb, nlh);

errout:

	read_unlock_bh(&tbl->lock);

	return NLMSG_CANCEL(skb, nlh);



nlmsg_failure:

	return -1;

	return nlmsg_cancel(skb, nlh);

}

 

static inline struct neigh_parms *lookup_neigh_params(struct neigh_table *tbl,
@@ -1905,34 +1903,43 @@ int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 


int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)

{

	int idx, family;

	int s_idx = cb->args[0];

	int family, tidx, nidx = 0;

	int tbl_skip = cb->args[0];

	int neigh_skip = cb->args[1];

	struct neigh_table *tbl;



	family = ((struct rtgenmsg *)NLMSG_DATA(cb->nlh))->rtgen_family;

	family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;



	read_lock(&neigh_tbl_lock);

	for (tbl = neigh_tables, idx = 0; tbl; tbl = tbl->next) {

	for (tbl = neigh_tables, tidx = 0; tbl; tbl = tbl->next, tidx++) {

		struct neigh_parms *p;



		if (idx < s_idx || (family && tbl->family != family))

		if (tidx < tbl_skip || (family && tbl->family != family))

			continue;



		if (neightbl_fill_info(tbl, skb, cb) <= 0)

		if (neightbl_fill_info(skb, tbl, NETLINK_CB(cb->skb).pid,

				       cb->nlh->nlmsg_seq, RTM_NEWNEIGHTBL,

				       NLM_F_MULTI) <= 0)

			break;



		for (++idx, p = tbl->parms.next; p; p = p->next, idx++) {

			if (idx < s_idx)

		for (nidx = 0, p = tbl->parms.next; p; p = p->next, nidx++) {

			if (nidx < neigh_skip)

				continue;



			if (neightbl_fill_param_info(tbl, p, skb, cb) <= 0)

			if (neightbl_fill_param_info(skb, tbl, p,

						     NETLINK_CB(cb->skb).pid,

						     cb->nlh->nlmsg_seq,

						     RTM_NEWNEIGHTBL,

						     NLM_F_MULTI) <= 0)

				goto out;

		}



		neigh_skip = 0;

	}

out:

	read_unlock(&neigh_tbl_lock);

	cb->args[0] = idx;

	cb->args[0] = tidx;

	cb->args[1] = nidx;



	return skb->len;

}