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ar71xx: merge more unaligned access hacks from cerowrt-next

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 36374
v19.07.3_mercusys_ac12_duma
Felix Fietkau 11 years ago
parent 3c3ab8db27
commit cd35ea2174
1 changed files with 231 additions and 2 deletions
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233
target/linux/ar71xx/patches-3.8/902-unaligned_access_hacks.patch
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@ -279,7 +279,7 @@
#include <asm/uaccess.h>
#include <linux/proc_fs.h>
@@ -763,10 +764,10 @@ static void tcp_v6_send_response(struct
@@ -763,10 +764,10 @@ static void tcp_v6_send_response(struct
topt = (__be32 *)(t1 + 1);
if (ts) {
@ -304,6 +304,15 @@
/*
* This structure contains configuration options per IPv6 link.
*/
@@ -79,7 +80,7 @@ static inline struct ipv6hdr *ipipv6_hdr
static inline __u8 ipv6_tclass(const struct ipv6hdr *iph)
{
- return (ntohl(*(__be32 *)iph) >> 20) & 0xff;
+ return (ntohl(net_hdr_word(iph)) >> 20) & 0xff;
}
/*
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -360,12 +360,12 @@ int ipv6_recv_error(struct sock *sk, str
@ -406,7 +415,7 @@
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
@@ -1240,7 +1240,7 @@ static int ip6gre_header(struct sk_buff
@@ -1240,7 +1240,7 @@ static int ip6gre_header(struct sk_buff
struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb_push(skb, t->hlen);
__be16 *p = (__be16 *)(ipv6h+1);
@ -739,6 +748,15 @@
#define ICMPV6_ROUTER_PREF_LOW 0x3
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -76,7 +76,7 @@ struct ra_msg {
struct icmp6hdr icmph;
__be32 reachable_time;
__be32 retrans_timer;
-};
+} __attribute__((packed, aligned(2)));
struct rd_msg {
struct icmp6hdr icmph;
@@ -142,10 +142,10 @@ static inline u32 ndisc_hashfn(const voi
{
const u32 *p32 = pkey;
@ -754,6 +772,19 @@
}
static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey)
@@ -163,8 +163,10 @@ static inline struct neighbour *__ipv6_n
n = rcu_dereference_bh(n->next)) {
u32 *n32 = (u32 *) n->primary_key;
if (n->dev == dev &&
- ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) |
- (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0) {
+ ((n32[0] ^ net_hdr_word(&p32[0])) |
+ (n32[1] ^ net_hdr_word(&p32[1])) |
+ (n32[2] ^ net_hdr_word(&p32[2])) |
+ (n32[3] ^ net_hdr_word(&p32[3]))) == 0) {
if (!atomic_inc_not_zero(&n->refcnt))
n = NULL;
break;
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -142,7 +142,7 @@ next_knode:
@ -787,3 +818,201 @@
/* All fields must match except length and Traffic Class. */
if (nlen != skb_network_header_len(p) ||
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -39,7 +39,7 @@ struct prefix_info {
__be32 reserved2;
struct in6_addr prefix;
-};
+} __attribute__((packed, aligned(2)));
#include <linux/netdevice.h>
--- a/include/net/inet_ecn.h
+++ b/include/net/inet_ecn.h
@@ -115,13 +115,13 @@ static inline int IP6_ECN_set_ce(struct
{
if (INET_ECN_is_not_ect(ipv6_get_dsfield(iph)))
return 0;
- *(__be32*)iph |= htonl(INET_ECN_CE << 20);
+ net_hdr_word(iph) |= htonl(INET_ECN_CE << 20);
return 1;
}
static inline void IP6_ECN_clear(struct ipv6hdr *iph)
{
- *(__be32*)iph &= ~htonl(INET_ECN_MASK << 20);
+ net_hdr_word(iph) &= ~htonl(INET_ECN_MASK << 20);
}
static inline void ipv6_copy_dscp(unsigned int dscp, struct ipv6hdr *inner)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -107,7 +107,7 @@ struct frag_hdr {
__u8 reserved;
__be16 frag_off;
__be32 identification;
-};
+} __attribute__((packed, aligned(2)));
#define IP6_MF 0x0001
@@ -386,6 +386,8 @@ static inline bool __ipv6_prefix_equal(c
unsigned int prefixlen)
{
unsigned int pdw, pbi;
+ /* Used for last <32-bit fraction of prefix */
+ u32 pbia1, pbia2;
/* check complete u32 in prefix */
pdw = prefixlen >> 5;
@@ -394,7 +396,9 @@ static inline bool __ipv6_prefix_equal(c
/* check incomplete u32 in prefix */
pbi = prefixlen & 0x1f;
- if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
+ pbia1 = net_hdr_word(&a1[pdw]);
+ pbia2 = net_hdr_word(&a2[pdw]);
+ if (pbi && ((pbia1 ^ pbia2) & htonl((0xffffffff) << (32 - pbi))))
return false;
return true;
@@ -521,13 +525,13 @@ static inline void ipv6_addr_set_v4mappe
*/
static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
{
- const __be32 *a1 = token1, *a2 = token2;
+ const struct in6_addr *a1 = token1, *a2 = token2;
int i;
addrlen >>= 2;
for (i = 0; i < addrlen; i++) {
- __be32 xb = a1[i] ^ a2[i];
+ __be32 xb = a1->s6_addr32[i] ^ a2->s6_addr32[i];
if (xb)
return i * 32 + 31 - __fls(ntohl(xb));
}
--- a/include/net/secure_seq.h
+++ b/include/net/secure_seq.h
@@ -2,6 +2,7 @@
#define _NET_SECURE_SEQ
#include <linux/types.h>
+#include <linux/in6.h>
extern __u32 secure_ip_id(__be32 daddr);
extern __u32 secure_ipv6_id(const __be32 daddr[4]);
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -55,7 +55,7 @@ enum {
/* Internet address. */
struct in_addr {
__be32 s_addr;
-};
+} __attribute__((packed, aligned(2)));
#define IP_TOS 1
#define IP_TTL 2
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -13,7 +13,7 @@
typedef union {
__be32 a4;
__be32 a6[4];
-} xfrm_address_t;
+} __attribute__((packed, aligned(2))) xfrm_address_t;
/* Ident of a specific xfrm_state. It is used on input to lookup
* the state by (spi,daddr,ah/esp) or to store information about
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -43,10 +43,11 @@ __u32 secure_tcpv6_sequence_number(const
u32 secret[MD5_MESSAGE_BYTES / 4];
u32 hash[MD5_DIGEST_WORDS];
u32 i;
+ const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
memcpy(hash, saddr, 16);
for (i = 0; i < 4; i++)
- secret[i] = net_secret[i] + (__force u32)daddr[i];
+ secret[i] = net_secret[i] + (__force u32)daddr6->s6_addr32[i];
secret[4] = net_secret[4] +
(((__force u16)sport << 16) + (__force u16)dport);
for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
@@ -64,10 +65,11 @@ u32 secure_ipv6_port_ephemeral(const __b
u32 secret[MD5_MESSAGE_BYTES / 4];
u32 hash[MD5_DIGEST_WORDS];
u32 i;
+ const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
memcpy(hash, saddr, 16);
for (i = 0; i < 4; i++)
- secret[i] = net_secret[i] + (__force u32) daddr[i];
+ secret[i] = net_secret[i] + (__force u32) daddr6->s6_addr32[i];
secret[4] = net_secret[4] + (__force u32)dport;
for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
secret[i] = net_secret[i];
@@ -165,10 +167,11 @@ u64 secure_dccpv6_sequence_number(__be32
u32 hash[MD5_DIGEST_WORDS];
u64 seq;
u32 i;
+ const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
memcpy(hash, saddr, 16);
for (i = 0; i < 4; i++)
- secret[i] = net_secret[i] + daddr[i];
+ secret[i] = net_secret[i] + daddr6->s6_addr32[i];
secret[4] = net_secret[4] +
(((__force u16)sport << 16) + (__force u16)dport);
for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -144,7 +144,7 @@ static __inline__ __be32 addr_bit_set(co
* See include/asm-generic/bitops/le.h.
*/
return (__force __be32)(1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) &
- addr[fn_bit >> 5];
+ net_hdr_word(&addr[fn_bit >> 5]);
}
static __inline__ struct fib6_node * node_alloc(void)
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -452,7 +452,7 @@ static void tcp_sack(const struct sk_buf
/* Fast path for timestamp-only option */
if (length == TCPOLEN_TSTAMP_ALIGNED
- && *(__be32 *)ptr == htonl((TCPOPT_NOP << 24)
+ && net_hdr_word(ptr) == htonl((TCPOPT_NOP << 24)
| (TCPOPT_NOP << 16)
| (TCPOPT_TIMESTAMP << 8)
| TCPOLEN_TIMESTAMP))
--- a/net/netfilter/xt_LOG.c
+++ b/net/netfilter/xt_LOG.c
@@ -521,9 +521,9 @@ static void dump_ipv6_packet(struct sbuf
/* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
sb_add(m, "LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
- (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20,
+ (ntohl(net_hdr_word(ih)) & 0x0ff00000) >> 20,
ih->hop_limit,
- (ntohl(*(__be32 *)ih) & 0x000fffff));
+ (ntohl(net_hdr_word(ih)) & 0x000fffff));
fragment = 0;
ptr = ip6hoff + sizeof(struct ipv6hdr);
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -77,8 +77,8 @@ int xfrm_parse_spi(struct sk_buff *skb,
if (!pskb_may_pull(skb, hlen))
return -EINVAL;
- *spi = *(__be32*)(skb_transport_header(skb) + offset);
- *seq = *(__be32*)(skb_transport_header(skb) + offset_seq);
+ *spi = net_hdr_word(skb_transport_header(skb) + offset);
+ *seq = net_hdr_word(skb_transport_header(skb) + offset_seq);
return 0;
}

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