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-rw-r--r--net/ipv4/fib_frontend.c121
-rw-r--r--net/ipv4/fib_rules.c10
-rw-r--r--net/ipv4/fib_semantics.c257
3 files changed, 206 insertions, 182 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 4a69a957872b..b05c23b05a9f 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -225,30 +225,33 @@ EXPORT_SYMBOL(inet_addr_type);
unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev,
__be32 addr)
{
- return __inet_dev_addr_type(net, dev, addr);
+ return __inet_dev_addr_type(net, dev, addr);
}
EXPORT_SYMBOL(inet_dev_addr_type);
/* Given (packet source, input interface) and optional (dst, oif, tos):
- - (main) check, that source is valid i.e. not broadcast or our local
- address.
- - figure out what "logical" interface this packet arrived
- and calculate "specific destination" address.
- - check, that packet arrived from expected physical interface.
+ * - (main) check, that source is valid i.e. not broadcast or our local
+ * address.
+ * - figure out what "logical" interface this packet arrived
+ * and calculate "specific destination" address.
+ * - check, that packet arrived from expected physical interface.
*/
-
int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
struct net_device *dev, __be32 *spec_dst,
u32 *itag, u32 mark)
{
struct in_device *in_dev;
- struct flowi fl = { .nl_u = { .ip4_u =
- { .daddr = src,
- .saddr = dst,
- .tos = tos } },
- .mark = mark,
- .iif = oif };
-
+ struct flowi fl = {
+ .nl_u = {
+ .ip4_u = {
+ .daddr = src,
+ .saddr = dst,
+ .tos = tos
+ }
+ },
+ .mark = mark,
+ .iif = oif
+ };
struct fib_result res;
int no_addr, rpf, accept_local;
bool dev_match;
@@ -477,9 +480,9 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
}
/*
- * Handle IP routing ioctl calls. These are used to manipulate the routing tables
+ * Handle IP routing ioctl calls.
+ * These are used to manipulate the routing tables
*/
-
int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
{
struct fib_config cfg;
@@ -523,7 +526,7 @@ int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
return -EINVAL;
}
-const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = {
+const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = {
[RTA_DST] = { .type = NLA_U32 },
[RTA_SRC] = { .type = NLA_U32 },
[RTA_IIF] = { .type = NLA_U32 },
@@ -537,7 +540,7 @@ const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = {
};
static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct fib_config *cfg)
+ struct nlmsghdr *nlh, struct fib_config *cfg)
{
struct nlattr *attr;
int err, remaining;
@@ -692,12 +695,11 @@ out:
}
/* Prepare and feed intra-kernel routing request.
- Really, it should be netlink message, but :-( netlink
- can be not configured, so that we feed it directly
- to fib engine. It is legal, because all events occur
- only when netlink is already locked.
+ * Really, it should be netlink message, but :-( netlink
+ * can be not configured, so that we feed it directly
+ * to fib engine. It is legal, because all events occur
+ * only when netlink is already locked.
*/
-
static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa)
{
struct net *net = dev_net(ifa->ifa_dev->dev);
@@ -743,9 +745,9 @@ void fib_add_ifaddr(struct in_ifaddr *ifa)
struct in_ifaddr *prim = ifa;
__be32 mask = ifa->ifa_mask;
__be32 addr = ifa->ifa_local;
- __be32 prefix = ifa->ifa_address&mask;
+ __be32 prefix = ifa->ifa_address & mask;
- if (ifa->ifa_flags&IFA_F_SECONDARY) {
+ if (ifa->ifa_flags & IFA_F_SECONDARY) {
prim = inet_ifa_byprefix(in_dev, prefix, mask);
if (prim == NULL) {
printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n");
@@ -755,22 +757,24 @@ void fib_add_ifaddr(struct in_ifaddr *ifa)
fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim);
- if (!(dev->flags&IFF_UP))
+ if (!(dev->flags & IFF_UP))
return;
/* Add broadcast address, if it is explicitly assigned. */
if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF))
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
- if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) &&
+ if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags & IFA_F_SECONDARY) &&
(prefix != addr || ifa->ifa_prefixlen < 32)) {
- fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL :
- RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim);
+ fib_magic(RTM_NEWROUTE,
+ dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+ prefix, ifa->ifa_prefixlen, prim);
/* Add network specific broadcasts, when it takes a sense */
if (ifa->ifa_prefixlen < 31) {
fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim);
- fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim);
+ fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix | ~mask,
+ 32, prim);
}
}
}
@@ -781,17 +785,18 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
struct net_device *dev = in_dev->dev;
struct in_ifaddr *ifa1;
struct in_ifaddr *prim = ifa;
- __be32 brd = ifa->ifa_address|~ifa->ifa_mask;
- __be32 any = ifa->ifa_address&ifa->ifa_mask;
+ __be32 brd = ifa->ifa_address | ~ifa->ifa_mask;
+ __be32 any = ifa->ifa_address & ifa->ifa_mask;
#define LOCAL_OK 1
#define BRD_OK 2
#define BRD0_OK 4
#define BRD1_OK 8
unsigned ok = 0;
- if (!(ifa->ifa_flags&IFA_F_SECONDARY))
- fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL :
- RTN_UNICAST, any, ifa->ifa_prefixlen, prim);
+ if (!(ifa->ifa_flags & IFA_F_SECONDARY))
+ fib_magic(RTM_DELROUTE,
+ dev->flags & IFF_LOOPBACK ? RTN_LOCAL : RTN_UNICAST,
+ any, ifa->ifa_prefixlen, prim);
else {
prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask);
if (prim == NULL) {
@@ -801,9 +806,9 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
}
/* Deletion is more complicated than add.
- We should take care of not to delete too much :-)
-
- Scan address list to be sure that addresses are really gone.
+ * We should take care of not to delete too much :-)
+ *
+ * Scan address list to be sure that addresses are really gone.
*/
for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
@@ -817,23 +822,23 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
ok |= BRD0_OK;
}
- if (!(ok&BRD_OK))
+ if (!(ok & BRD_OK))
fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim);
- if (!(ok&BRD1_OK))
+ if (!(ok & BRD1_OK))
fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim);
- if (!(ok&BRD0_OK))
+ if (!(ok & BRD0_OK))
fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim);
- if (!(ok&LOCAL_OK)) {
+ if (!(ok & LOCAL_OK)) {
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim);
/* Check, that this local address finally disappeared. */
if (inet_addr_type(dev_net(dev), ifa->ifa_local) != RTN_LOCAL) {
/* And the last, but not the least thing.
- We must flush stray FIB entries.
-
- First of all, we scan fib_info list searching
- for stray nexthop entries, then ignite fib_flush.
- */
+ * We must flush stray FIB entries.
+ *
+ * First of all, we scan fib_info list searching
+ * for stray nexthop entries, then ignite fib_flush.
+ */
if (fib_sync_down_addr(dev_net(dev), ifa->ifa_local))
fib_flush(dev_net(dev));
}
@@ -844,14 +849,20 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
#undef BRD1_OK
}
-static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
+static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
{
struct fib_result res;
- struct flowi fl = { .mark = frn->fl_mark,
- .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
- .tos = frn->fl_tos,
- .scope = frn->fl_scope } } };
+ struct flowi fl = {
+ .mark = frn->fl_mark,
+ .nl_u = {
+ .ip4_u = {
+ .daddr = frn->fl_addr,
+ .tos = frn->fl_tos,
+ .scope = frn->fl_scope
+ }
+ }
+ };
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
@@ -899,8 +910,8 @@ static void nl_fib_input(struct sk_buff *skb)
nl_fib_lookup(frn, tb);
- pid = NETLINK_CB(skb).pid; /* pid of sending process */
- NETLINK_CB(skb).pid = 0; /* from kernel */
+ pid = NETLINK_CB(skb).pid; /* pid of sending process */
+ NETLINK_CB(skb).pid = 0; /* from kernel */
NETLINK_CB(skb).dst_group = 0; /* unicast */
netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT);
}
@@ -947,7 +958,7 @@ static int fib_inetaddr_event(struct notifier_block *this, unsigned long event,
fib_del_ifaddr(ifa);
if (ifa->ifa_dev->ifa_list == NULL) {
/* Last address was deleted from this interface.
- Disable IP.
+ * Disable IP.
*/
fib_disable_ip(dev, 1, 0);
} else {
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 76daeb5ff564..32300521e32c 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -6,7 +6,7 @@
* IPv4 Forwarding Information Base: policy rules.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- * Thomas Graf <tgraf@suug.ch>
+ * Thomas Graf <tgraf@suug.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -14,7 +14,7 @@
* 2 of the License, or (at your option) any later version.
*
* Fixes:
- * Rani Assaf : local_rule cannot be deleted
+ * Rani Assaf : local_rule cannot be deleted
* Marc Boucher : routing by fwmark
*/
@@ -32,8 +32,7 @@
#include <net/ip_fib.h>
#include <net/fib_rules.h>
-struct fib4_rule
-{
+struct fib4_rule {
struct fib_rule common;
u8 dst_len;
u8 src_len;
@@ -91,7 +90,8 @@ static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
goto errout;
}
- if ((tbl = fib_get_table(rule->fr_net, rule->table)) == NULL)
+ tbl = fib_get_table(rule->fr_net, rule->table);
+ if (!tbl)
goto errout;
err = fib_table_lookup(tbl, flp, (struct fib_result *) arg->result);
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 20f09c5b31e8..ba52f399a898 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -60,21 +60,30 @@ static struct hlist_head fib_info_devhash[DEVINDEX_HASHSIZE];
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 *nexthop_nh; \
-for (nhsel=0, nexthop_nh = (struct fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nexthop_nh++, nhsel++)
+#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 *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 */
/* Hope, that gcc will optimize it to get rid of dummy loop */
-#define for_nexthops(fi) { int nhsel = 0; const struct fib_nh * nh = (fi)->fib_nh; \
-for (nhsel=0; nhsel < 1; nhsel++)
+#define for_nexthops(fi) { \
+ int nhsel; const struct fib_nh *nh = (fi)->fib_nh; \
+ for (nhsel = 0; nhsel < 1; nhsel++)
-#define change_nexthops(fi) { int nhsel = 0; struct fib_nh *nexthop_nh = (struct fib_nh *)((fi)->fib_nh); \
-for (nhsel=0; nhsel < 1; nhsel++)
+#define change_nexthops(fi) { \
+ int nhsel; \
+ struct fib_nh *nexthop_nh = (struct fib_nh *)((fi)->fib_nh); \
+ for (nhsel = 0; nhsel < 1; nhsel++)
#endif /* CONFIG_IP_ROUTE_MULTIPATH */
@@ -86,54 +95,54 @@ static const struct
int error;
u8 scope;
} fib_props[RTN_MAX + 1] = {
- {
+ [RTN_UNSPEC] = {
.error = 0,
.scope = RT_SCOPE_NOWHERE,
- }, /* RTN_UNSPEC */
- {
+ },
+ [RTN_UNICAST] = {
.error = 0,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_UNICAST */
- {
+ },
+ [RTN_LOCAL] = {
.error = 0,
.scope = RT_SCOPE_HOST,
- }, /* RTN_LOCAL */
- {
+ },
+ [RTN_BROADCAST] = {
.error = 0,
.scope = RT_SCOPE_LINK,
- }, /* RTN_BROADCAST */
- {
+ },
+ [RTN_ANYCAST] = {
.error = 0,
.scope = RT_SCOPE_LINK,
- }, /* RTN_ANYCAST */
- {
+ },
+ [RTN_MULTICAST] = {
.error = 0,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_MULTICAST */
- {
+ },
+ [RTN_BLACKHOLE] = {
.error = -EINVAL,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_BLACKHOLE */
- {
+ },
+ [RTN_UNREACHABLE] = {
.error = -EHOSTUNREACH,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_UNREACHABLE */
- {
+ },
+ [RTN_PROHIBIT] = {
.error = -EACCES,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_PROHIBIT */
- {
+ },
+ [RTN_THROW] = {
.error = -EAGAIN,
.scope = RT_SCOPE_UNIVERSE,
- }, /* RTN_THROW */
- {
+ },
+ [RTN_NAT] = {
.error = -EINVAL,
.scope = RT_SCOPE_NOWHERE,
- }, /* RTN_NAT */
- {
+ },
+ [RTN_XRESOLVE] = {
.error = -EINVAL,
.scope = RT_SCOPE_NOWHERE,
- }, /* RTN_XRESOLVE */
+ },
};
@@ -142,7 +151,7 @@ static const struct
void free_fib_info(struct fib_info *fi)
{
if (fi->fib_dead == 0) {
- printk(KERN_WARNING "Freeing alive fib_info %p\n", fi);
+ pr_warning("Freeing alive fib_info %p\n", fi);
return;
}
change_nexthops(fi) {
@@ -173,7 +182,7 @@ void fib_release_info(struct fib_info *fi)
spin_unlock_bh(&fib_info_lock);
}
-static __inline__ int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
+static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
{
const struct fib_nh *onh = ofi->fib_nh;
@@ -187,7 +196,7 @@ static __inline__ int nh_comp(const struct fib_info *fi, const struct fib_info *
#ifdef CONFIG_NET_CLS_ROUTE
nh->nh_tclassid != onh->nh_tclassid ||
#endif
- ((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
+ ((nh->nh_flags ^ onh->nh_flags) & ~RTNH_F_DEAD))
return -1;
onh++;
} endfor_nexthops(fi);
@@ -238,7 +247,7 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
nfi->fib_priority == fi->fib_priority &&
memcmp(nfi->fib_metrics, fi->fib_metrics,
sizeof(fi->fib_metrics)) == 0 &&
- ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
+ ((nfi->fib_flags ^ fi->fib_flags) & ~RTNH_F_DEAD) == 0 &&
(nfi->fib_nhs == 0 || nh_comp(fi, nfi) == 0))
return fi;
}
@@ -247,9 +256,8 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
}
/* Check, that the gateway is already configured.
- Used only by redirect accept routine.
+ * Used only by redirect accept routine.
*/
-
int ip_fib_check_default(__be32 gw, struct net_device *dev)
{
struct hlist_head *head;
@@ -264,7 +272,7 @@ int ip_fib_check_default(__be32 gw, struct net_device *dev)
hlist_for_each_entry(nh, node, head, nh_hash) {
if (nh->nh_dev == dev &&
nh->nh_gw == gw &&
- !(nh->nh_flags&RTNH_F_DEAD)) {
+ !(nh->nh_flags & RTNH_F_DEAD)) {
spin_unlock(&fib_info_lock);
return 0;
}
@@ -362,10 +370,10 @@ int fib_detect_death(struct fib_info *fi, int order,
}
if (state == NUD_REACHABLE)
return 0;
- if ((state&NUD_VALID) && order != dflt)
+ if ((state & NUD_VALID) && order != dflt)
return 0;
- if ((state&NUD_VALID) ||
- (*last_idx<0 && order > dflt)) {
+ if ((state & NUD_VALID) ||
+ (*last_idx < 0 && order > dflt)) {
*last_resort = fi;
*last_idx = order;
}
@@ -476,69 +484,69 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi)
/*
- Picture
- -------
-
- Semantics of nexthop is very messy by historical reasons.
- We have to take into account, that:
- a) gateway can be actually local interface address,
- so that gatewayed route is direct.
- b) gateway must be on-link address, possibly
- described not by an ifaddr, but also by a direct route.
- c) If both gateway and interface are specified, they should not
- contradict.
- d) If we use tunnel routes, gateway could be not on-link.
-
- Attempt to reconcile all of these (alas, self-contradictory) conditions
- results in pretty ugly and hairy code with obscure logic.
-
- I chose to generalized it instead, so that the size
- of code does not increase practically, but it becomes
- much more general.
- Every prefix is assigned a "scope" value: "host" is local address,
- "link" is direct route,
- [ ... "site" ... "interior" ... ]
- and "universe" is true gateway route with global meaning.
-
- Every prefix refers to a set of "nexthop"s (gw, oif),
- where gw must have narrower scope. This recursion stops
- when gw has LOCAL scope or if "nexthop" is declared ONLINK,
- which means that gw is forced to be on link.
-
- Code is still hairy, but now it is apparently logically
- consistent and very flexible. F.e. as by-product it allows
- to co-exists in peace independent exterior and interior
- routing processes.
-
- Normally it looks as following.
-
- {universe prefix} -> (gw, oif) [scope link]
- |
- |-> {link prefix} -> (gw, oif) [scope local]
- |
- |-> {local prefix} (terminal node)
+ * Picture
+ * -------
+ *
+ * Semantics of nexthop is very messy by historical reasons.
+ * We have to take into account, that:
+ * a) gateway can be actually local interface address,
+ * so that gatewayed route is direct.
+ * b) gateway must be on-link address, possibly
+ * described not by an ifaddr, but also by a direct route.
+ * c) If both gateway and interface are specified, they should not
+ * contradict.
+ * d) If we use tunnel routes, gateway could be not on-link.
+ *
+ * Attempt to reconcile all of these (alas, self-contradictory) conditions
+ * results in pretty ugly and hairy code with obscure logic.
+ *
+ * I chose to generalized it instead, so that the size
+ * of code does not increase practically, but it becomes
+ * much more general.
+ * Every prefix is assigned a "scope" value: "host" is local address,
+ * "link" is direct route,
+ * [ ... "site" ... "interior" ... ]
+ * and "universe" is true gateway route with global meaning.
+ *
+ * Every prefix refers to a set of "nexthop"s (gw, oif),
+ * where gw must have narrower scope. This recursion stops
+ * when gw has LOCAL scope or if "nexthop" is declared ONLINK,
+ * which means that gw is forced to be on link.
+ *
+ * Code is still hairy, but now it is apparently logically
+ * consistent and very flexible. F.e. as by-product it allows
+ * to co-exists in peace independent exterior and interior
+ * routing processes.
+ *
+ * Normally it looks as following.
+ *
+ * {universe prefix} -> (gw, oif) [scope link]
+ * |
+ * |-> {link prefix} -> (gw, oif) [scope local]
+ * |
+ * |-> {local prefix} (terminal node)
*/
-
static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
struct fib_nh *nh)
{
int err;
struct net *net;
+ struct net_device *dev;
net = cfg->fc_nlinfo.nl_net;
if (nh->nh_gw) {
struct fib_result res;
- if (nh->nh_flags&RTNH_F_ONLINK) {
- struct net_device *dev;
+ if (nh->nh_flags & RTNH_F_ONLINK) {
if (cfg->fc_scope >= RT_SCOPE_LINK)
return -EINVAL;
if (inet_addr_type(net, nh->nh_gw) != RTN_UNICAST)
return -EINVAL;
- if ((dev = __dev_get_by_index(net, nh->nh_oif)) == NULL)
+ dev = __dev_get_by_index(net, nh->nh_oif);
+ if (!dev)
return -ENODEV;
- if (!(dev->flags&IFF_UP))
+ if (!(dev->flags & IFF_UP))
return -ENETDOWN;
nh->nh_dev = dev;
dev_hold(dev);
@@ -559,7 +567,8 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
/* It is not necessary, but requires a bit of thinking */
if (fl.fl4_scope < RT_SCOPE_LINK)
fl.fl4_scope = RT_SCOPE_LINK;
- if ((err = fib_lookup(net, &fl, &res)) != 0)
+ err = fib_lookup(net, &fl, &res);
+ if (err)
return err;
}
err = -EINVAL;
@@ -567,11 +576,12 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
goto out;
nh->nh_scope = res.scope;
nh->nh_oif = FIB_RES_OIF(res);
- if ((nh->nh_dev = FIB_RES_DEV(res)) == NULL)
+ nh->nh_dev = dev = FIB_RES_DEV(res);
+ if (!dev)
goto out;
- dev_hold(nh->nh_dev);
+ dev_hold(dev);
err = -ENETDOWN;
- if (!(nh->nh_dev->flags & IFF_UP))
+ if (!(dev->flags & IFF_UP))
goto out;
err = 0;
out:
@@ -580,13 +590,13 @@ out:
} else {
struct in_device *in_dev;
- if (nh->nh_flags&(RTNH_F_PERVASIVE|RTNH_F_ONLINK))
+ if (nh->nh_flags & (RTNH_F_PERVASIVE | RTNH_F_ONLINK))
return -EINVAL;
in_dev = inetdev_by_index(net, nh->nh_oif);
if (in_dev == NULL)
return -ENODEV;
- if (!(in_dev->dev->flags&IFF_UP)) {
+ if (!(in_dev->dev->flags & IFF_UP)) {
in_dev_put(in_dev);
return -ENETDOWN;
}
@@ -602,7 +612,9 @@ static inline unsigned int fib_laddr_hashfn(__be32 val)
{
unsigned int mask = (fib_hash_size - 1);
- return ((__force u32)val ^ ((__force u32)val >> 7) ^ ((__force u32)val >> 14)) & mask;
+ return ((__force u32)val ^
+ ((__force u32)val >> 7) ^
+ ((__force u32)val >> 14)) & mask;
}
static struct hlist_head *fib_hash_alloc(int bytes)
@@ -611,7 +623,8 @@ static struct hlist_head *fib_hash_alloc(int bytes)
return kzalloc(bytes, GFP_KERNEL);
else
return (struct hlist_head *)
- __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(bytes));
+ __get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(bytes));
}
static void fib_hash_free(struct hlist_head *hash, int bytes)
@@ -806,7 +819,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
goto failure;
} else {
change_nexthops(fi) {
- if ((err = fib_check_nh(cfg, fi, nexthop_nh)) != 0)
+ err = fib_check_nh(cfg, fi, nexthop_nh);
+ if (err != 0)
goto failure;
} endfor_nexthops(fi)
}
@@ -819,7 +833,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
}
link_it:
- if ((ofi = fib_find_info(fi)) != NULL) {
+ ofi = fib_find_info(fi);
+ if (ofi) {
fi->fib_dead = 1;
free_fib_info(fi);
ofi->fib_treeref++;
@@ -895,7 +910,7 @@ int fib_semantic_match(struct list_head *head, const struct flowi *flp,
case RTN_ANYCAST:
case RTN_MULTICAST:
for_nexthops(fi) {
- if (nh->nh_flags&RTNH_F_DEAD)
+ if (nh->nh_flags & RTNH_F_DEAD)
continue;
if (!flp->oif || flp->oif == nh->nh_oif)
break;
@@ -906,16 +921,15 @@ int fib_semantic_match(struct list_head *head, const struct flowi *flp,
goto out_fill_res;
}
#else
- if (nhsel < 1) {
+ if (nhsel < 1)
goto out_fill_res;
- }
#endif
endfor_nexthops(fi);
continue;
default:
- printk(KERN_WARNING "fib_semantic_match bad type %#x\n",
- fa->fa_type);
+ pr_warning("fib_semantic_match bad type %#x\n",
+ fa->fa_type);
return -EINVAL;
}
}
@@ -1028,10 +1042,10 @@ nla_put_failure:
}
/*
- Update FIB if:
- - local address disappeared -> we must delete all the entries
- referring to it.
- - device went down -> we must shutdown all nexthops going via it.
+ * Update FIB if:
+ * - local address disappeared -> we must delete all the entries
+ * referring to it.
+ * - device went down -> we must shutdown all nexthops going via it.
*/
int fib_sync_down_addr(struct net *net, __be32 local)
{
@@ -1078,7 +1092,7 @@ int fib_sync_down_dev(struct net_device *dev, int force)
prev_fi = fi;
dead = 0;
change_nexthops(fi) {
- if (nexthop_nh->nh_flags&RTNH_F_DEAD)
+ if (nexthop_nh->nh_flags & RTNH_F_DEAD)
dead++;
else if (nexthop_nh->nh_dev == dev &&
nexthop_nh->nh_scope != scope) {
@@ -1110,10 +1124,9 @@ int fib_sync_down_dev(struct net_device *dev, int force)
#ifdef CONFIG_IP_ROUTE_MULTIPATH
/*
- Dead device goes up. We wake up dead nexthops.
- It takes sense only on multipath routes.
+ * Dead device goes up. We wake up dead nexthops.
+ * It takes sense only on multipath routes.
*/
-
int fib_sync_up(struct net_device *dev)
{
struct fib_info *prev_fi;
@@ -1123,7 +1136,7 @@ int fib_sync_up(struct net_device *dev)
struct fib_nh *nh;
int ret;
- if (!(dev->flags&IFF_UP))
+ if (!(dev->flags & IFF_UP))
return 0;
prev_fi = NULL;
@@ -1142,12 +1155,12 @@ int fib_sync_up(struct net_device *dev)
prev_fi = fi;
alive = 0;
change_nexthops(fi) {
- if (!(nexthop_nh->nh_flags&RTNH_F_DEAD)) {
+ if (!(nexthop_nh->nh_flags & RTNH_F_DEAD)) {
alive++;
continue;
}
if (nexthop_nh->nh_dev == NULL ||
- !(nexthop_nh->nh_dev->flags&IFF_UP))
+ !(nexthop_nh->nh_dev->flags & IFF_UP))
continue;
if (nexthop_nh->nh_dev != dev ||
!__in_dev_get_rtnl(dev))
@@ -1169,10 +1182,9 @@ int fib_sync_up(struct net_device *dev)
}
/*
- The algorithm is suboptimal, but it provides really
- fair weighted route distribution.
+ * The algorithm is suboptimal, but it provides really
+ * fair weighted route distribution.
*/
-
void fib_select_multipath(const struct flowi *flp, struct fib_result *res)
{
struct fib_info *fi = res->fi;
@@ -1182,7 +1194,7 @@ void fib_select_multipath(const struct flowi *flp, struct fib_result *res)
if (fi->fib_power <= 0) {
int power = 0;
change_nexthops(fi) {
- if (!(nexthop_nh->nh_flags&RTNH_F_DEAD)) {
+ if (!(nexthop_nh->nh_flags & RTNH_F_DEAD)) {
power += nexthop_nh->nh_weight;
nexthop_nh->nh_power = nexthop_nh->nh_weight;
}
@@ -1198,15 +1210,16 @@ void fib_select_multipath(const struct flowi *flp, struct fib_result *res)
/* w should be random number [0..fi->fib_power-1],
- it is pretty bad approximation.
+ * it is pretty bad approximation.
*/
w = jiffies % fi->fib_power;
change_nexthops(fi) {
- if (!(nexthop_nh->nh_flags&RTNH_F_DEAD) &&
+ if (!(nexthop_nh->nh_flags & RTNH_F_DEAD) &&
nexthop_nh->nh_power) {
- if ((w -= nexthop_nh->nh_power) <= 0) {
+ w -= nexthop_nh->nh_power;
+ if (w <= 0) {
nexthop_nh->nh_power--;
fi->fib_power--;
res->nh_sel = nhsel;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 22:19:56 +0100