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Date: Wed, 5 Apr 2017 10:40:13 +0200
From: Ursula Braun <ubraun@...ux.vnet.ibm.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-s390@...r.kernel.org,
jwi@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
heiko.carstens@...ibm.com, raspl@...ux.vnet.ibm.com,
ubraun@...ux.vnet.ibm.com
Subject: [PATCH net-next 5/7] s390/qeth: improve endianness handling
From: Hans Wippel <hwippel@...ux.vnet.ibm.com>
Avoid endianness warnings reported by sparse by (1) using endianness
conversions for assigning and using network packet fields, and (2)
removing unnecessary endianness conversions from qeth_l3_rebuild_skb. No
functional changes.
Signed-off-by: Hans Wippel <hwippel@...ux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ubraun@...ux.vnet.ibm.com>
---
drivers/s390/net/qeth_core.h | 4 ++--
drivers/s390/net/qeth_core_main.c | 11 +++++-----
drivers/s390/net/qeth_l3_main.c | 46 +++++++++++++++++++--------------------
drivers/s390/net/qeth_l3_sys.c | 4 ++--
4 files changed, 33 insertions(+), 32 deletions(-)
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 22aa2cd..6764ab9 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -844,9 +844,9 @@ static inline int qeth_get_ip_version(struct sk_buff *skb)
{
__be16 *p = &((struct ethhdr *)skb->data)->h_proto;
- if (*p == ETH_P_8021Q)
+ if (be16_to_cpu(*p) == ETH_P_8021Q)
p += 2;
- switch (*p) {
+ switch (be16_to_cpu(*p)) {
case ETH_P_IPV6:
return 6;
case ETH_P_IP:
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 194f9d8..e76b764 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1201,7 +1201,7 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
while (skb) {
QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
- if (skb->protocol == ETH_P_AF_IUCV) {
+ if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
if (skb->sk) {
struct iucv_sock *iucv = iucv_sk(skb->sk);
iucv->sk_txnotify(skb, notification);
@@ -1232,7 +1232,8 @@ static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
while (skb) {
QETH_CARD_TEXT(buf->q->card, 5, "skbr");
QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
- if (notify_general_error && skb->protocol == ETH_P_AF_IUCV) {
+ if (notify_general_error &&
+ be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
if (skb->sk) {
iucv = iucv_sk(skb->sk);
iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
@@ -3796,9 +3797,9 @@ int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
case QETH_PRIO_Q_ING_VLAN:
tci = &((struct ethhdr *)skb->data)->h_proto;
- if (*tci == ETH_P_8021Q)
- return qeth_cut_iqd_prio(card, ~*(tci + 1) >>
- (VLAN_PRIO_SHIFT + 1) & 3);
+ if (be16_to_cpu(*tci) == ETH_P_8021Q)
+ return qeth_cut_iqd_prio(card,
+ ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
break;
default:
break;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 8de5f74..91060fb 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1337,7 +1337,7 @@ qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
}
-static void qeth_l3_get_mac_for_ipm(__u32 ipm, char *mac)
+static void qeth_l3_get_mac_for_ipm(__be32 ipm, char *mac)
{
ip_eth_mc_map(ipm, mac);
}
@@ -1410,7 +1410,7 @@ qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
im4 = rcu_dereference(im4->next_rcu)) {
qeth_l3_get_mac_for_ipm(im4->multiaddr, buf);
- tmp->u.a4.addr = im4->multiaddr;
+ tmp->u.a4.addr = be32_to_cpu(im4->multiaddr);
memcpy(tmp->mac, buf, sizeof(tmp->mac));
ipm = qeth_l3_ip_from_hash(card, tmp);
@@ -1421,7 +1421,7 @@ qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
if (!ipm)
continue;
memcpy(ipm->mac, buf, sizeof(tmp->mac));
- ipm->u.a4.addr = im4->multiaddr;
+ ipm->u.a4.addr = be32_to_cpu(im4->multiaddr);
ipm->is_multicast = 1;
ipm->disp_flag = QETH_DISP_ADDR_ADD;
hash_add(card->ip_mc_htable,
@@ -1594,8 +1594,8 @@ static void qeth_l3_free_vlan_addresses4(struct qeth_card *card,
spin_lock_bh(&card->ip_lock);
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
- addr->u.a4.addr = ifa->ifa_address;
- addr->u.a4.mask = ifa->ifa_mask;
+ addr->u.a4.addr = be32_to_cpu(ifa->ifa_address);
+ addr->u.a4.mask = be32_to_cpu(ifa->ifa_mask);
addr->type = QETH_IP_TYPE_NORMAL;
qeth_l3_delete_ip(card, addr);
}
@@ -1686,25 +1686,25 @@ static inline int qeth_l3_rebuild_skb(struct qeth_card *card,
struct sk_buff *skb, struct qeth_hdr *hdr,
unsigned short *vlan_id)
{
- __be16 prot;
+ __u16 prot;
struct iphdr *ip_hdr;
unsigned char tg_addr[MAX_ADDR_LEN];
int is_vlan = 0;
if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
- prot = htons((hdr->hdr.l3.flags & QETH_HDR_IPV6)? ETH_P_IPV6 :
- ETH_P_IP);
+ prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
+ ETH_P_IP;
switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
case QETH_CAST_MULTICAST:
switch (prot) {
#ifdef CONFIG_QETH_IPV6
- case __constant_htons(ETH_P_IPV6):
+ case ETH_P_IPV6:
ndisc_mc_map((struct in6_addr *)
skb->data + 24,
tg_addr, card->dev, 0);
break;
#endif
- case __constant_htons(ETH_P_IP):
+ case ETH_P_IP:
ip_hdr = (struct iphdr *)skb->data;
ip_eth_mc_map(ip_hdr->daddr, tg_addr);
break;
@@ -1791,7 +1791,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
magic = *(__u16 *)skb->data;
if ((card->info.type == QETH_CARD_TYPE_IQD) &&
(magic == ETH_P_AF_IUCV)) {
- skb->protocol = ETH_P_AF_IUCV;
+ skb->protocol = cpu_to_be16(ETH_P_AF_IUCV);
skb->pkt_type = PACKET_HOST;
skb->mac_header = NET_SKB_PAD;
skb->dev = card->dev;
@@ -2568,10 +2568,10 @@ int inline qeth_l3_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
rcu_read_unlock();
/* try something else */
- if (skb->protocol == ETH_P_IPV6)
+ if (be16_to_cpu(skb->protocol) == ETH_P_IPV6)
return (skb_network_header(skb)[24] == 0xff) ?
RTN_MULTICAST : 0;
- else if (skb->protocol == ETH_P_IP)
+ else if (be16_to_cpu(skb->protocol) == ETH_P_IP)
return ((skb_network_header(skb)[16] & 0xf0) == 0xe0) ?
RTN_MULTICAST : 0;
/* ... */
@@ -2726,7 +2726,7 @@ static void qeth_tso_fill_header(struct qeth_card *card,
hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
sizeof(struct qeth_hdr_tso));
tcph->check = 0;
- if (skb->protocol == ETH_P_IPV6) {
+ if (be16_to_cpu(skb->protocol) == ETH_P_IPV6) {
ip6h->payload_len = 0;
tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
0, IPPROTO_TCP, 0);
@@ -2773,7 +2773,7 @@ static int qeth_l3_get_elements_no_tso(struct qeth_card *card,
static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
int rc;
- u16 *tag;
+ __be16 *tag;
struct qeth_hdr *hdr = NULL;
int hdr_elements = 0;
int elements;
@@ -2794,7 +2794,7 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (((card->info.type == QETH_CARD_TYPE_IQD) &&
(((card->options.cq != QETH_CQ_ENABLED) && !ipv) ||
((card->options.cq == QETH_CQ_ENABLED) &&
- (skb->protocol != ETH_P_AF_IUCV)))) ||
+ (be16_to_cpu(skb->protocol) != ETH_P_AF_IUCV)))) ||
card->options.sniffer)
goto tx_drop;
@@ -2819,7 +2819,7 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if ((card->info.type == QETH_CARD_TYPE_IQD) &&
!skb_is_nonlinear(skb)) {
new_skb = skb;
- if (new_skb->protocol == ETH_P_AF_IUCV)
+ if (be16_to_cpu(new_skb->protocol) == ETH_P_AF_IUCV)
data_offset = 0;
else
data_offset = ETH_HLEN;
@@ -2850,9 +2850,9 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
new_skb->data + 8, 4);
skb_copy_to_linear_data_offset(new_skb, 8,
new_skb->data + 12, 4);
- tag = (u16 *)(new_skb->data + 12);
- *tag = __constant_htons(ETH_P_8021Q);
- *(tag + 1) = htons(skb_vlan_tag_get(new_skb));
+ tag = (__be16 *)(new_skb->data + 12);
+ *tag = cpu_to_be16(ETH_P_8021Q);
+ *(tag + 1) = cpu_to_be16(skb_vlan_tag_get(new_skb));
}
}
@@ -2890,7 +2890,7 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
qeth_l3_fill_header(card, hdr, new_skb, ipv,
cast_type);
} else {
- if (new_skb->protocol == ETH_P_AF_IUCV)
+ if (be16_to_cpu(new_skb->protocol) == ETH_P_AF_IUCV)
qeth_l3_fill_af_iucv_hdr(card, hdr, new_skb);
else {
qeth_l3_fill_header(card, hdr, new_skb, ipv,
@@ -3468,8 +3468,8 @@ static int qeth_l3_ip_event(struct notifier_block *this,
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
if (addr) {
- addr->u.a4.addr = ifa->ifa_address;
- addr->u.a4.mask = ifa->ifa_mask;
+ addr->u.a4.addr = be32_to_cpu(ifa->ifa_address);
+ addr->u.a4.mask = be32_to_cpu(ifa->ifa_mask);
addr->type = QETH_IP_TYPE_NORMAL;
} else
return NOTIFY_DONE;
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index 05e9471..ff29a4b 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -286,7 +286,7 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
if (!addr)
return -ENOMEM;
- addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
+ addr->u.a6.addr.s6_addr32[0] = cpu_to_be32(0xfe800000);
addr->u.a6.addr.s6_addr32[1] = 0x00000000;
for (i = 8; i < 16; i++)
addr->u.a6.addr.s6_addr[i] =
@@ -320,7 +320,7 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
if (addr != NULL) {
- addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
+ addr->u.a6.addr.s6_addr32[0] = cpu_to_be32(0xfe800000);
addr->u.a6.addr.s6_addr32[1] = 0x00000000;
for (i = 8; i < 16; i++)
addr->u.a6.addr.s6_addr[i] = card->options.hsuid[i - 8];
--
2.10.2
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