[IPv4]: Convert FIB dumping to use new netlink api

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 86 insertions, 80 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index acc18bdf2dee..d537c933abe3 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -591,8 +591,8 @@ int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
         struct hlist_node *node;
         int dumped = 0;
 
-        if (NLMSG_PAYLOAD(cb->nlh, 0) >= sizeof(struct rtmsg) &&
-            ((struct rtmsg*)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED)
+        if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
+            ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED)
                 return ip_rt_dump(skb, cb);
 
         s_h = cb->args[0];
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index 357557549ce5..88133b383dc5 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -693,7 +693,7 @@ fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,
                                           tb->tb_id,
                                           fa->fa_type,
                                           fa->fa_scope,
-                                          &f->fn_key,
+                                          f->fn_key,
                                           fz->fz_order,
                                           fa->fa_tos,
                                           fa->fa_info,
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index d6d1a89e4003..fd6f7769f8ab 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -26,7 +26,7 @@ extern void fib_release_info(struct fib_info *);
 extern struct fib_info *fib_create_info(struct fib_config *cfg);
 extern int fib_nh_match(struct fib_config *cfg, struct fib_info *fi);
 extern int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
-                         u32 tb_id, u8 type, u8 scope, void *dst,
+                         u32 tb_id, u8 type, u8 scope, u32 dst,
                          int dst_len, u8 tos, struct fib_info *fi,
                          unsigned int);
 extern void rtmsg_fib(int event, u32 key, struct fib_alias *fa,
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 340f9db389e5..2ead09543f68 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -286,7 +286,7 @@ void rtmsg_fib(int event, u32 key, struct fib_alias *fa,
                 goto errout;
 
         err = fib_dump_info(skb, info->pid, seq, event, tb_id,
-                            fa->fa_type, fa->fa_scope, &key, dst_len,
+                            fa->fa_type, fa->fa_scope, key, dst_len,
                             fa->fa_tos, fa->fa_info, 0);
         if (err < 0) {
                 kfree_skb(skb);
@@ -928,79 +928,87 @@ u32 __fib_res_prefsrc(struct fib_result *res)
         return inet_select_addr(FIB_RES_DEV(*res), FIB_RES_GW(*res), res->scope);
 }
 
-int
-fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
-              u32 tb_id, u8 type, u8 scope, void *dst, int dst_len, u8 tos,
-              struct fib_info *fi, unsigned int flags)
+int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
+                  u32 tb_id, u8 type, u8 scope, u32 dst, int dst_len, u8 tos,
+                  struct fib_info *fi, unsigned int flags)
 {
+        struct nlmsghdr *nlh;
         struct rtmsg *rtm;
-        struct nlmsghdr  *nlh;
-        unsigned char    *b = skb->tail;
 
-        nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*rtm), flags);
-        rtm = NLMSG_DATA(nlh);
+        nlh = nlmsg_put(skb, pid, seq, event, sizeof(*rtm), flags);
+        if (nlh == NULL)
+                return -ENOBUFS;
+
+        rtm = nlmsg_data(nlh);
         rtm->rtm_family = AF_INET;
         rtm->rtm_dst_len = dst_len;
         rtm->rtm_src_len = 0;
         rtm->rtm_tos = tos;
         rtm->rtm_table = tb_id;
-        RTA_PUT_U32(skb, RTA_TABLE, tb_id);
+        NLA_PUT_U32(skb, RTA_TABLE, tb_id);
         rtm->rtm_type = type;
         rtm->rtm_flags = fi->fib_flags;
         rtm->rtm_scope = scope;
-        if (rtm->rtm_dst_len)
-                RTA_PUT(skb, RTA_DST, 4, dst);
         rtm->rtm_protocol = fi->fib_protocol;
+
+        if (rtm->rtm_dst_len)
+                NLA_PUT_U32(skb, RTA_DST, dst);
+
         if (fi->fib_priority)
-                RTA_PUT(skb, RTA_PRIORITY, 4, &fi->fib_priority);
+                NLA_PUT_U32(skb, RTA_PRIORITY, fi->fib_priority);
+
         if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)
-                goto rtattr_failure;
+                goto nla_put_failure;
+
         if (fi->fib_prefsrc)
-                RTA_PUT(skb, RTA_PREFSRC, 4, &fi->fib_prefsrc);
+                NLA_PUT_U32(skb, RTA_PREFSRC, fi->fib_prefsrc);
+
         if (fi->fib_nhs == 1) {
                 if (fi->fib_nh->nh_gw)
-                        RTA_PUT(skb, RTA_GATEWAY, 4, &fi->fib_nh->nh_gw);
+                        NLA_PUT_U32(skb, RTA_GATEWAY, fi->fib_nh->nh_gw);
+
                 if (fi->fib_nh->nh_oif)
-                        RTA_PUT(skb, RTA_OIF, sizeof(int), &fi->fib_nh->nh_oif);
+                        NLA_PUT_U32(skb, RTA_OIF, fi->fib_nh->nh_oif);
 #ifdef CONFIG_NET_CLS_ROUTE
                 if (fi->fib_nh[0].nh_tclassid)
-                        RTA_PUT(skb, RTA_FLOW, 4, &fi->fib_nh[0].nh_tclassid);
+                        NLA_PUT_U32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid);
 #endif
         }
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
         if (fi->fib_nhs > 1) {
-                struct rtnexthop *nhp;
-                struct rtattr *mp_head;
-                if (skb_tailroom(skb) <= RTA_SPACE(0))
-                        goto rtattr_failure;
-                mp_head = (struct rtattr*)skb_put(skb, RTA_SPACE(0));
+                struct rtnexthop *rtnh;
+                struct nlattr *mp;
+
+                mp = nla_nest_start(skb, RTA_MULTIPATH);
+                if (mp == NULL)
+                        goto nla_put_failure;
 
                 for_nexthops(fi) {
-                        if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4))
-                                goto rtattr_failure;
-                        nhp = (struct rtnexthop*)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
-                        nhp->rtnh_flags = nh->nh_flags & 0xFF;
-                        nhp->rtnh_hops = nh->nh_weight-1;
-                        nhp->rtnh_ifindex = nh->nh_oif;
+                        rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh));
+                        if (rtnh == NULL)
+                                goto nla_put_failure;
+
+                        rtnh->rtnh_flags = nh->nh_flags & 0xFF;
+                        rtnh->rtnh_hops = nh->nh_weight - 1;
+                        rtnh->rtnh_ifindex = nh->nh_oif;
+
                         if (nh->nh_gw)
-                                RTA_PUT(skb, RTA_GATEWAY, 4, &nh->nh_gw);
+                                NLA_PUT_U32(skb, RTA_GATEWAY, nh->nh_gw);
 #ifdef CONFIG_NET_CLS_ROUTE
                         if (nh->nh_tclassid)
-                                RTA_PUT(skb, RTA_FLOW, 4, &nh->nh_tclassid);
+                                NLA_PUT_U32(skb, RTA_FLOW, nh->nh_tclassid);
 #endif
-                        nhp->rtnh_len = skb->tail - (unsigned char*)nhp;
+                        /* length of rtnetlink header + attributes */
+                        rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh;
                 } endfor_nexthops(fi);
-                mp_head->rta_type = RTA_MULTIPATH;
-                mp_head->rta_len = skb->tail - (u8*)mp_head;
+
+                nla_nest_end(skb, mp);
         }
 #endif
-        nlh->nlmsg_len = skb->tail - b;
-        return skb->len;
+        return nlmsg_end(skb, nlh);
 
-nlmsg_failure:
-rtattr_failure:
-        skb_trim(skb, b - skb->data);
-        return -1;
+nla_put_failure:
+        return nlmsg_cancel(skb, nlh);
 }
 
 /*
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 41bef0a88ab6..9c3ff6ba6e21 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1854,7 +1854,7 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fi
                                   tb->tb_id,
                                   fa->fa_type,
                                   fa->fa_scope,
-                                  &xkey,
+                                  xkey,
                                   plen,
                                   fa->fa_tos,
                                   fa->fa_info, 0) < 0) {
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index b8f6cadc5b3a..31b67059ac29 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2639,52 +2639,54 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
 {
         struct rtable *rt = (struct rtable*)skb->dst;
         struct rtmsg *r;
-        struct nlmsghdr  *nlh;
-        unsigned char    *b = skb->tail;
+        struct nlmsghdr *nlh;
         struct rta_cacheinfo ci;
-#ifdef CONFIG_IP_MROUTE
-        struct rtattr *eptr;
-#endif
-        nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
-        r = NLMSG_DATA(nlh);
+
+        nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
+        if (nlh == NULL)
+                return -ENOBUFS;
+
+        r = nlmsg_data(nlh);
         r->rtm_family    = AF_INET;
         r->rtm_dst_len  = 32;
         r->rtm_src_len  = 0;
         r->rtm_tos      = rt->fl.fl4_tos;
         r->rtm_table    = RT_TABLE_MAIN;
-        RTA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
+        NLA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
         r->rtm_type     = rt->rt_type;
         r->rtm_scope    = RT_SCOPE_UNIVERSE;
         r->rtm_protocol = RTPROT_UNSPEC;
         r->rtm_flags    = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED;
         if (rt->rt_flags & RTCF_NOTIFY)
                 r->rtm_flags |= RTM_F_NOTIFY;
-        RTA_PUT(skb, RTA_DST, 4, &rt->rt_dst);
+
+        NLA_PUT_U32(skb, RTA_DST, rt->rt_dst);
+
         if (rt->fl.fl4_src) {
                 r->rtm_src_len = 32;
-                RTA_PUT(skb, RTA_SRC, 4, &rt->fl.fl4_src);
+                NLA_PUT_U32(skb, RTA_SRC, rt->fl.fl4_src);
         }
         if (rt->u.dst.dev)
-                RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->u.dst.dev->ifindex);
+                NLA_PUT_U32(skb, RTA_OIF, rt->u.dst.dev->ifindex);
 #ifdef CONFIG_NET_CLS_ROUTE
         if (rt->u.dst.tclassid)
-                RTA_PUT(skb, RTA_FLOW, 4, &rt->u.dst.tclassid);
+                NLA_PUT_U32(skb, RTA_FLOW, rt->u.dst.tclassid);
 #endif
 #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-        if (rt->rt_multipath_alg != IP_MP_ALG_NONE) {
-                __u32 alg = rt->rt_multipath_alg;
-
-                RTA_PUT(skb, RTA_MP_ALGO, 4, &alg);
-        }
+        if (rt->rt_multipath_alg != IP_MP_ALG_NONE)
+                NLA_PUT_U32(skb, RTA_MP_ALGO, rt->rt_multipath_alg);
 #endif
         if (rt->fl.iif)
-                RTA_PUT(skb, RTA_PREFSRC, 4, &rt->rt_spec_dst);
+                NLA_PUT_U32(skb, RTA_PREFSRC, rt->rt_spec_dst);
         else if (rt->rt_src != rt->fl.fl4_src)
-                RTA_PUT(skb, RTA_PREFSRC, 4, &rt->rt_src);
+                NLA_PUT_U32(skb, RTA_PREFSRC, rt->rt_src);
+
         if (rt->rt_dst != rt->rt_gateway)
-                RTA_PUT(skb, RTA_GATEWAY, 4, &rt->rt_gateway);
+                NLA_PUT_U32(skb, RTA_GATEWAY, rt->rt_gateway);
+
         if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
-                goto rtattr_failure;
+                goto nla_put_failure;
+
         ci.rta_lastuse  = jiffies_to_clock_t(jiffies - rt->u.dst.lastuse);
         ci.rta_used     = rt->u.dst.__use;
         ci.rta_clntref  = atomic_read(&rt->u.dst.__refcnt);
@@ -2701,10 +2703,7 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
                         ci.rta_tsage = xtime.tv_sec - rt->peer->tcp_ts_stamp;
                 }
         }
-#ifdef CONFIG_IP_MROUTE
-        eptr = (struct rtattr*)skb->tail;
-#endif
-        RTA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+
         if (rt->fl.iif) {
 #ifdef CONFIG_IP_MROUTE
                 u32 dst = rt->rt_dst;
@@ -2716,25 +2715,24 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
                                 if (!nowait) {
                                         if (err == 0)
                                                 return 0;
-                                        goto nlmsg_failure;
+                                        goto nla_put_failure;
                                 } else {
                                         if (err == -EMSGSIZE)
-                                                goto nlmsg_failure;
-                                        ((struct rta_cacheinfo*)RTA_DATA(eptr))->rta_error = err;
+                                                goto nla_put_failure;
+                                        ci.rta_error = err;
                                 }
                         }
                 } else
 #endif
-                        RTA_PUT(skb, RTA_IIF, sizeof(int), &rt->fl.iif);
+                        NLA_PUT_U32(skb, RTA_IIF, rt->fl.iif);
         }
 
-        nlh->nlmsg_len = skb->tail - b;
-        return skb->len;
+        NLA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+
+        return nlmsg_end(skb, nlh);
 
-nlmsg_failure:
-rtattr_failure:
-        skb_trim(skb, b - skb->data);
-        return -1;
+nla_put_failure:
+        return nlmsg_cancel(skb, nlh);
 }
 
 int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)