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Date: Tue, 20 Apr 2010 15:18:24 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6] net: Fix various endianness glitches
Sparse can help us find endianness bugs, but we need to make some
cleanups to be able to more easily spot real bugs.
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
net/bridge/br_multicast.c | 2 +-
net/bridge/br_private.h | 15 ++++++++-------
net/ethernet/eth.c | 2 +-
net/ipv4/af_inet.c | 8 ++++----
net/ipv4/ipmr.c | 10 +++++-----
net/ipv4/route.c | 29 ++++++++++++++---------------
net/ipv4/tcp.c | 15 ++++++++-------
net/ipv4/tcp_ipv4.c | 4 ++--
net/ipv4/tcp_output.c | 4 ++--
net/ipv4/udp.c | 8 ++++----
net/ipv6/addrconf.c | 3 ++-
net/ipv6/ip6_fib.c | 3 ++-
net/ipv6/tcp_ipv6.c | 4 ++--
net/ipv6/udp.c | 4 ++--
net/sched/sch_sfq.c | 10 +++++-----
net/sunrpc/xprt.c | 2 +-
net/xfrm/xfrm_hash.h | 3 ++-
17 files changed, 65 insertions(+), 61 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 3fe86ff..61e1d10 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -29,7 +29,7 @@
static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
{
- return jhash_1word(mdb->secret, (u32)ip) & (mdb->max - 1);
+ return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1);
}
static struct net_bridge_mdb_entry *__br_mdb_ip_get(
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 791d4ab..63181e4 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -130,19 +130,20 @@ struct net_bridge_port
#endif
};
+struct br_cpu_netstats {
+ unsigned long rx_packets;
+ unsigned long rx_bytes;
+ unsigned long tx_packets;
+ unsigned long tx_bytes;
+};
+
struct net_bridge
{
spinlock_t lock;
struct list_head port_list;
struct net_device *dev;
- struct br_cpu_netstats __percpu {
- unsigned long rx_packets;
- unsigned long rx_bytes;
- unsigned long tx_packets;
- unsigned long tx_bytes;
- } *stats;
-
+ struct br_cpu_netstats __percpu *stats;
spinlock_t hash_lock;
struct hlist_head hash[BR_HASH_SIZE];
unsigned long feature_mask;
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 205a1c1..3584696 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -136,7 +136,7 @@ int eth_rebuild_header(struct sk_buff *skb)
default:
printk(KERN_DEBUG
"%s: unable to resolve type %X addresses.\n",
- dev->name, (int)eth->h_proto);
+ dev->name, (__force int)eth->h_proto);
memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
break;
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c5376c7..cb0de78 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1323,8 +1323,8 @@ static struct sk_buff **inet_gro_receive(struct sk_buff **head,
if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
goto out_unlock;
- id = ntohl(*(u32 *)&iph->id);
- flush = (u16)((ntohl(*(u32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
+ id = ntohl(*(__be32 *)&iph->id);
+ flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
id >>= 16;
for (p = *head; p; p = p->next) {
@@ -1337,8 +1337,8 @@ static struct sk_buff **inet_gro_receive(struct sk_buff **head,
if ((iph->protocol ^ iph2->protocol) |
(iph->tos ^ iph2->tos) |
- (iph->saddr ^ iph2->saddr) |
- (iph->daddr ^ iph2->daddr)) {
+ ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
+ ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
NAPI_GRO_CB(p)->same_flow = 0;
continue;
}
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 7d8a2bc..a2df501 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1772,10 +1772,10 @@ int ip_mr_input(struct sk_buff *skb)
vif = ipmr_find_vif(mrt, skb->dev);
if (vif >= 0) {
- int err = ipmr_cache_unresolved(mrt, vif, skb);
+ int err2 = ipmr_cache_unresolved(mrt, vif, skb);
read_unlock(&mrt_lock);
- return err;
+ return err2;
}
read_unlock(&mrt_lock);
kfree_skb(skb);
@@ -2227,9 +2227,9 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
const struct ipmr_mfc_iter *it = seq->private;
const struct mr_table *mrt = it->mrt;
- seq_printf(seq, "%08lX %08lX %-3hd",
- (unsigned long) mfc->mfc_mcastgrp,
- (unsigned long) mfc->mfc_origin,
+ seq_printf(seq, "%08X %08X %-3hd",
+ (__force u32) mfc->mfc_mcastgrp,
+ (__force u32) mfc->mfc_origin,
mfc->mfc_parent);
if (it->cache != &mrt->mfc_unres_queue) {
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index cb562fd..a947428 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -258,10 +258,9 @@ static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat);
(__raw_get_cpu_var(rt_cache_stat).field++)
static inline unsigned int rt_hash(__be32 daddr, __be32 saddr, int idx,
- int genid)
+ int genid)
{
- return jhash_3words((__force u32)(__be32)(daddr),
- (__force u32)(__be32)(saddr),
+ return jhash_3words((__force u32)daddr, (__force u32)saddr,
idx, genid)
& rt_hash_mask;
}
@@ -378,12 +377,13 @@ static int rt_cache_seq_show(struct seq_file *seq, void *v)
struct rtable *r = v;
int len;
- seq_printf(seq, "%s\t%08lX\t%08lX\t%8X\t%d\t%u\t%d\t"
- "%08lX\t%d\t%u\t%u\t%02X\t%d\t%1d\t%08X%n",
+ seq_printf(seq, "%s\t%08X\t%08X\t%8X\t%d\t%u\t%d\t"
+ "%08X\t%d\t%u\t%u\t%02X\t%d\t%1d\t%08X%n",
r->u.dst.dev ? r->u.dst.dev->name : "*",
- (unsigned long)r->rt_dst, (unsigned long)r->rt_gateway,
+ (__force u32)r->rt_dst,
+ (__force u32)r->rt_gateway,
r->rt_flags, atomic_read(&r->u.dst.__refcnt),
- r->u.dst.__use, 0, (unsigned long)r->rt_src,
+ r->u.dst.__use, 0, (__force u32)r->rt_src,
(dst_metric(&r->u.dst, RTAX_ADVMSS) ?
(int)dst_metric(&r->u.dst, RTAX_ADVMSS) + 40 : 0),
dst_metric(&r->u.dst, RTAX_WINDOW),
@@ -685,18 +685,17 @@ static inline bool rt_caching(const struct net *net)
static inline bool compare_hash_inputs(const struct flowi *fl1,
const struct flowi *fl2)
{
- return (__force u32)(((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) |
- (fl1->nl_u.ip4_u.saddr ^ fl2->nl_u.ip4_u.saddr) |
+ return ((((__force u32)fl1->nl_u.ip4_u.daddr ^ (__force u32)fl2->nl_u.ip4_u.daddr) |
+ ((__force u32)fl1->nl_u.ip4_u.saddr ^ (__force u32)fl2->nl_u.ip4_u.saddr) |
(fl1->iif ^ fl2->iif)) == 0);
}
static inline int compare_keys(struct flowi *fl1, struct flowi *fl2)
{
- return ((__force u32)((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) |
- (fl1->nl_u.ip4_u.saddr ^ fl2->nl_u.ip4_u.saddr)) |
+ return (((__force u32)fl1->nl_u.ip4_u.daddr ^ (__force u32)fl2->nl_u.ip4_u.daddr) |
+ ((__force u32)fl1->nl_u.ip4_u.saddr ^ (__force u32)fl2->nl_u.ip4_u.saddr) |
(fl1->mark ^ fl2->mark) |
- (*(u16 *)&fl1->nl_u.ip4_u.tos ^
- *(u16 *)&fl2->nl_u.ip4_u.tos) |
+ (*(u16 *)&fl1->nl_u.ip4_u.tos ^ *(u16 *)&fl2->nl_u.ip4_u.tos) |
(fl1->oif ^ fl2->oif) |
(fl1->iif ^ fl2->iif)) == 0;
}
@@ -2319,8 +2318,8 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
rcu_read_lock();
for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
rth = rcu_dereference(rth->u.dst.rt_next)) {
- if (((rth->fl.fl4_dst ^ daddr) |
- (rth->fl.fl4_src ^ saddr) |
+ if ((((__force u32)rth->fl.fl4_dst ^ (__force u32)daddr) |
+ ((__force u32)rth->fl.fl4_src ^ (__force u32)saddr) |
(rth->fl.iif ^ iif) |
rth->fl.oif |
(rth->fl.fl4_tos ^ tos)) == 0 &&
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 0f8caf6..d3ad2fa 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2721,7 +2721,7 @@ struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb)
struct tcphdr *th2;
unsigned int len;
unsigned int thlen;
- unsigned int flags;
+ __be32 flags;
unsigned int mss = 1;
unsigned int hlen;
unsigned int off;
@@ -2771,10 +2771,10 @@ struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb)
found:
flush = NAPI_GRO_CB(p)->flush;
- flush |= flags & TCP_FLAG_CWR;
- flush |= (flags ^ tcp_flag_word(th2)) &
- ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH);
- flush |= th->ack_seq ^ th2->ack_seq;
+ flush |= (__force int)(flags & TCP_FLAG_CWR);
+ flush |= (__force int)((flags ^ tcp_flag_word(th2)) &
+ ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH));
+ flush |= (__force int)(th->ack_seq ^ th2->ack_seq);
for (i = sizeof(*th); i < thlen; i += 4)
flush |= *(u32 *)((u8 *)th + i) ^
*(u32 *)((u8 *)th2 + i);
@@ -2795,8 +2795,9 @@ found:
out_check_final:
flush = len < mss;
- flush |= flags & (TCP_FLAG_URG | TCP_FLAG_PSH | TCP_FLAG_RST |
- TCP_FLAG_SYN | TCP_FLAG_FIN);
+ flush |= (__force int)(flags & (TCP_FLAG_URG | TCP_FLAG_PSH |
+ TCP_FLAG_RST | TCP_FLAG_SYN |
+ TCP_FLAG_FIN));
if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
pp = head;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index ad08392..4d6717d 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1286,8 +1286,8 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
goto drop_and_release;
/* Secret recipe starts with IP addresses */
- *mess++ ^= daddr;
- *mess++ ^= saddr;
+ *mess++ ^= (__force u32)daddr;
+ *mess++ ^= (__force u32)saddr;
/* plus variable length Initiator Cookie */
c = (u8 *)mess;
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 2b7d71f..429ad92 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -861,7 +861,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
th->urg_ptr = htons(tp->snd_up - tcb->seq);
th->urg = 1;
} else if (after(tcb->seq + 0xFFFF, tp->snd_nxt)) {
- th->urg_ptr = 0xFFFF;
+ th->urg_ptr = htons(0xFFFF);
th->urg = 1;
}
}
@@ -2485,7 +2485,7 @@ struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
*tail-- ^= TCP_SKB_CB(skb)->seq + 1;
/* recommended */
- *tail-- ^= ((th->dest << 16) | th->source);
+ *tail-- ^= (((__force u32)th->dest << 16) | (__force u32)th->source);
*tail-- ^= (u32)(unsigned long)cvp; /* per sockopt */
sha_transform((__u32 *)&xvp->cookie_bakery[0],
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 666b963..1e18f9c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -307,13 +307,13 @@ static int ipv4_rcv_saddr_equal(const struct sock *sk1, const struct sock *sk2)
static unsigned int udp4_portaddr_hash(struct net *net, __be32 saddr,
unsigned int port)
{
- return jhash_1word(saddr, net_hash_mix(net)) ^ port;
+ return jhash_1word((__force u32)saddr, net_hash_mix(net)) ^ port;
}
int udp_v4_get_port(struct sock *sk, unsigned short snum)
{
unsigned int hash2_nulladdr =
- udp4_portaddr_hash(sock_net(sk), INADDR_ANY, snum);
+ udp4_portaddr_hash(sock_net(sk), htonl(INADDR_ANY), snum);
unsigned int hash2_partial =
udp4_portaddr_hash(sock_net(sk), inet_sk(sk)->inet_rcv_saddr, 0);
@@ -466,14 +466,14 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
daddr, hnum, dif,
hslot2, slot2);
if (!result) {
- hash2 = udp4_portaddr_hash(net, INADDR_ANY, hnum);
+ hash2 = udp4_portaddr_hash(net, htonl(INADDR_ANY), hnum);
slot2 = hash2 & udptable->mask;
hslot2 = &udptable->hash2[slot2];
if (hslot->count < hslot2->count)
goto begin;
result = udp4_lib_lookup2(net, saddr, sport,
- INADDR_ANY, hnum, dif,
+ htonl(INADDR_ANY), hnum, dif,
hslot2, slot2);
}
rcu_read_unlock();
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 7cba884..34d2d64 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -588,7 +588,8 @@ static u32 ipv6_addr_hash(const struct in6_addr *addr)
* We perform the hash function over the last 64 bits of the address
* This will include the IEEE address token on links that support it.
*/
- return jhash_2words(addr->s6_addr32[2], addr->s6_addr32[3], 0)
+ return jhash_2words((__force u32)addr->s6_addr32[2],
+ (__force u32)addr->s6_addr32[3], 0)
& (IN6_ADDR_HSIZE - 1);
}
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index dc6e0b8..92a122b 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -144,7 +144,8 @@ static __inline__ __be32 addr_bit_set(void *token, int fn_bit)
* htonl(1 << ((~fn_bit)&0x1F))
* See include/asm-generic/bitops/le.h.
*/
- return (1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) & addr[fn_bit >> 5];
+ return (__force __be32)(1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) &
+ addr[fn_bit >> 5];
}
static __inline__ struct fib6_node * node_alloc(void)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index bd5ef7b..a92b4a5 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1234,12 +1234,12 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
goto drop_and_free;
/* Secret recipe starts with IP addresses */
- d = &ipv6_hdr(skb)->daddr.s6_addr32[0];
+ d = (__force u32 *)&ipv6_hdr(skb)->daddr.s6_addr32[0];
*mess++ ^= *d++;
*mess++ ^= *d++;
*mess++ ^= *d++;
*mess++ ^= *d++;
- d = &ipv6_hdr(skb)->saddr.s6_addr32[0];
+ d = (__force u32 *)&ipv6_hdr(skb)->saddr.s6_addr32[0];
*mess++ ^= *d++;
*mess++ ^= *d++;
*mess++ ^= *d++;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 9082485..92bf903 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -91,9 +91,9 @@ static unsigned int udp6_portaddr_hash(struct net *net,
if (ipv6_addr_any(addr6))
hash = jhash_1word(0, mix);
else if (ipv6_addr_v4mapped(addr6))
- hash = jhash_1word(addr6->s6_addr32[3], mix);
+ hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix);
else
- hash = jhash2(addr6->s6_addr32, 4, mix);
+ hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix);
return hash ^ port;
}
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index c5a9ac5..c657628 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -123,8 +123,8 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
case htons(ETH_P_IP):
{
const struct iphdr *iph = ip_hdr(skb);
- h = iph->daddr;
- h2 = iph->saddr ^ iph->protocol;
+ h = (__force u32)iph->daddr;
+ h2 = (__force u32)iph->saddr ^ iph->protocol;
if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
(iph->protocol == IPPROTO_TCP ||
iph->protocol == IPPROTO_UDP ||
@@ -138,8 +138,8 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
case htons(ETH_P_IPV6):
{
struct ipv6hdr *iph = ipv6_hdr(skb);
- h = iph->daddr.s6_addr32[3];
- h2 = iph->saddr.s6_addr32[3] ^ iph->nexthdr;
+ h = (__force u32)iph->daddr.s6_addr32[3];
+ h2 = (__force u32)iph->saddr.s6_addr32[3] ^ iph->nexthdr;
if (iph->nexthdr == IPPROTO_TCP ||
iph->nexthdr == IPPROTO_UDP ||
iph->nexthdr == IPPROTO_UDPLITE ||
@@ -150,7 +150,7 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
break;
}
default:
- h = (unsigned long)skb_dst(skb) ^ skb->protocol;
+ h = (unsigned long)skb_dst(skb) ^ (__force u32)skb->protocol;
h2 = (unsigned long)skb->sk;
}
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 42f09ad..699ade6 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -974,7 +974,7 @@ void xprt_reserve(struct rpc_task *task)
static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt)
{
- return xprt->xid++;
+ return (__force __be32)xprt->xid++;
}
static inline void xprt_init_xid(struct rpc_xprt *xprt)
diff --git a/net/xfrm/xfrm_hash.h b/net/xfrm/xfrm_hash.h
index e5195c9..1396572 100644
--- a/net/xfrm/xfrm_hash.h
+++ b/net/xfrm/xfrm_hash.h
@@ -16,7 +16,8 @@ static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)
static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
{
- return ntohl(daddr->a4 + saddr->a4);
+ u32 sum = (__force u32)daddr->a4 + (__force u32)saddr->a4;
+ return ntohl((__force __be32)sum);
}
static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t *daddr, xfrm_address_t *saddr)
--
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