From 71fceff0ea36d5a6cffecb272b8b3970535fe905 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 15 Jan 2010 01:16:40 -0800 Subject: ipv4: Use less conflicting local var name in change_nexthops() loop macro. As noticed by H Hartley Sweeten, since change_nexthops() uses 'nh' as it's iterator variable, it can conflict with other existing local vars. Use "nexthop_nh" to avoid the conflict and make it easier to figure out where this magic variable comes from. Signed-off-by: David S. Miller --- net/ipv4/fib_semantics.c | 76 +++++++++++++++++++++++++----------------------- 1 file changed, 40 insertions(+), 36 deletions(-) (limited to 'net/ipv4/fib_semantics.c') diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index ed19aa6919c2..96b21011a3e4 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -62,8 +62,8 @@ static DEFINE_SPINLOCK(fib_multipath_lock); #define for_nexthops(fi) { int nhsel; const struct fib_nh * nh; \ for (nhsel=0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++) -#define change_nexthops(fi) { int nhsel; struct fib_nh * nh; \ -for (nhsel=0, nh = (struct fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++) +#define change_nexthops(fi) { int nhsel; struct fib_nh *nexthop_nh; \ +for (nhsel=0, nexthop_nh = (struct fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nexthop_nh++, nhsel++) #else /* CONFIG_IP_ROUTE_MULTIPATH */ @@ -72,7 +72,7 @@ for (nhsel=0, nh = (struct fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, #define for_nexthops(fi) { int nhsel = 0; const struct fib_nh * nh = (fi)->fib_nh; \ for (nhsel=0; nhsel < 1; nhsel++) -#define change_nexthops(fi) { int nhsel = 0; struct fib_nh * nh = (struct fib_nh *)((fi)->fib_nh); \ +#define change_nexthops(fi) { int nhsel = 0; struct fib_nh *nexthop_nh = (struct fib_nh *)((fi)->fib_nh); \ for (nhsel=0; nhsel < 1; nhsel++) #endif /* CONFIG_IP_ROUTE_MULTIPATH */ @@ -145,9 +145,9 @@ void free_fib_info(struct fib_info *fi) return; } change_nexthops(fi) { - if (nh->nh_dev) - dev_put(nh->nh_dev); - nh->nh_dev = NULL; + if (nexthop_nh->nh_dev) + dev_put(nexthop_nh->nh_dev); + nexthop_nh->nh_dev = NULL; } endfor_nexthops(fi); fib_info_cnt--; release_net(fi->fib_net); @@ -162,9 +162,9 @@ void fib_release_info(struct fib_info *fi) if (fi->fib_prefsrc) hlist_del(&fi->fib_lhash); change_nexthops(fi) { - if (!nh->nh_dev) + if (!nexthop_nh->nh_dev) continue; - hlist_del(&nh->nh_hash); + hlist_del(&nexthop_nh->nh_hash); } endfor_nexthops(fi) fi->fib_dead = 1; fib_info_put(fi); @@ -395,19 +395,20 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh, if (!rtnh_ok(rtnh, remaining)) return -EINVAL; - nh->nh_flags = (cfg->fc_flags & ~0xFF) | rtnh->rtnh_flags; - nh->nh_oif = rtnh->rtnh_ifindex; - nh->nh_weight = rtnh->rtnh_hops + 1; + nexthop_nh->nh_flags = + (cfg->fc_flags & ~0xFF) | rtnh->rtnh_flags; + nexthop_nh->nh_oif = rtnh->rtnh_ifindex; + nexthop_nh->nh_weight = rtnh->rtnh_hops + 1; attrlen = rtnh_attrlen(rtnh); if (attrlen > 0) { struct nlattr *nla, *attrs = rtnh_attrs(rtnh); nla = nla_find(attrs, attrlen, RTA_GATEWAY); - nh->nh_gw = nla ? nla_get_be32(nla) : 0; + nexthop_nh->nh_gw = nla ? nla_get_be32(nla) : 0; #ifdef CONFIG_NET_CLS_ROUTE nla = nla_find(attrs, attrlen, RTA_FLOW); - nh->nh_tclassid = nla ? nla_get_u32(nla) : 0; + nexthop_nh->nh_tclassid = nla ? nla_get_u32(nla) : 0; #endif } @@ -738,7 +739,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg) fi->fib_nhs = nhs; change_nexthops(fi) { - nh->nh_parent = fi; + nexthop_nh->nh_parent = fi; } endfor_nexthops(fi) if (cfg->fc_mx) { @@ -808,7 +809,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg) goto failure; } else { change_nexthops(fi) { - if ((err = fib_check_nh(cfg, fi, nh)) != 0) + if ((err = fib_check_nh(cfg, fi, nexthop_nh)) != 0) goto failure; } endfor_nexthops(fi) } @@ -843,11 +844,11 @@ link_it: struct hlist_head *head; unsigned int hash; - if (!nh->nh_dev) + if (!nexthop_nh->nh_dev) continue; - hash = fib_devindex_hashfn(nh->nh_dev->ifindex); + hash = fib_devindex_hashfn(nexthop_nh->nh_dev->ifindex); head = &fib_info_devhash[hash]; - hlist_add_head(&nh->nh_hash, head); + hlist_add_head(&nexthop_nh->nh_hash, head); } endfor_nexthops(fi) spin_unlock_bh(&fib_info_lock); return fi; @@ -1080,21 +1081,21 @@ int fib_sync_down_dev(struct net_device *dev, int force) prev_fi = fi; dead = 0; change_nexthops(fi) { - if (nh->nh_flags&RTNH_F_DEAD) + if (nexthop_nh->nh_flags&RTNH_F_DEAD) dead++; - else if (nh->nh_dev == dev && - nh->nh_scope != scope) { - nh->nh_flags |= RTNH_F_DEAD; + else if (nexthop_nh->nh_dev == dev && + nexthop_nh->nh_scope != scope) { + nexthop_nh->nh_flags |= RTNH_F_DEAD; #ifdef CONFIG_IP_ROUTE_MULTIPATH spin_lock_bh(&fib_multipath_lock); - fi->fib_power -= nh->nh_power; - nh->nh_power = 0; + fi->fib_power -= nexthop_nh->nh_power; + nexthop_nh->nh_power = 0; spin_unlock_bh(&fib_multipath_lock); #endif dead++; } #ifdef CONFIG_IP_ROUTE_MULTIPATH - if (force > 1 && nh->nh_dev == dev) { + if (force > 1 && nexthop_nh->nh_dev == dev) { dead = fi->fib_nhs; break; } @@ -1144,18 +1145,20 @@ int fib_sync_up(struct net_device *dev) prev_fi = fi; alive = 0; change_nexthops(fi) { - if (!(nh->nh_flags&RTNH_F_DEAD)) { + if (!(nexthop_nh->nh_flags&RTNH_F_DEAD)) { alive++; continue; } - if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP)) + if (nexthop_nh->nh_dev == NULL || + !(nexthop_nh->nh_dev->flags&IFF_UP)) continue; - if (nh->nh_dev != dev || !__in_dev_get_rtnl(dev)) + if (nexthop_nh->nh_dev != dev || + !__in_dev_get_rtnl(dev)) continue; alive++; spin_lock_bh(&fib_multipath_lock); - nh->nh_power = 0; - nh->nh_flags &= ~RTNH_F_DEAD; + nexthop_nh->nh_power = 0; + nexthop_nh->nh_flags &= ~RTNH_F_DEAD; spin_unlock_bh(&fib_multipath_lock); } endfor_nexthops(fi) @@ -1182,9 +1185,9 @@ void fib_select_multipath(const struct flowi *flp, struct fib_result *res) if (fi->fib_power <= 0) { int power = 0; change_nexthops(fi) { - if (!(nh->nh_flags&RTNH_F_DEAD)) { - power += nh->nh_weight; - nh->nh_power = nh->nh_weight; + if (!(nexthop_nh->nh_flags&RTNH_F_DEAD)) { + power += nexthop_nh->nh_weight; + nexthop_nh->nh_power = nexthop_nh->nh_weight; } } endfor_nexthops(fi); fi->fib_power = power; @@ -1204,9 +1207,10 @@ void fib_select_multipath(const struct flowi *flp, struct fib_result *res) w = jiffies % fi->fib_power; change_nexthops(fi) { - if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) { - if ((w -= nh->nh_power) <= 0) { - nh->nh_power--; + if (!(nexthop_nh->nh_flags&RTNH_F_DEAD) && + nexthop_nh->nh_power) { + if ((w -= nexthop_nh->nh_power) <= 0) { + nexthop_nh->nh_power--; fi->fib_power--; res->nh_sel = nhsel; spin_unlock_bh(&fib_multipath_lock); -- cgit v1.2.3 From d088dde7b19628f386c486f16cd471f5b5682ca8 Mon Sep 17 00:00:00 2001 From: Christoph Egger Date: Wed, 3 Feb 2010 06:05:54 +0000 Subject: ipv4: obsolete config in kernel source (IP_ROUTE_PERVASIVE) CONFIG_IP_ROUTE_PERVASIVE is missing a corresponding config IP_ROUTE_PERVASIVE somewhere in KConfig (and missing it for ages already) so it looks like some aging artefact no longer needed. Therefor this patch kills of the only remaining reference to that config Item removing the already unrechable code snipet. Signed-off-by: Christoph Egger Signed-off-by: David S. Miller --- net/ipv4/fib_semantics.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'net/ipv4/fib_semantics.c') diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 96b21011a3e4..1af0ea0fb6a2 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -528,10 +528,6 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi, if (nh->nh_gw) { struct fib_result res; -#ifdef CONFIG_IP_ROUTE_PERVASIVE - if (nh->nh_flags&RTNH_F_PERVASIVE) - return 0; -#endif if (nh->nh_flags&RTNH_F_ONLINK) { struct net_device *dev; -- cgit v1.2.3