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linux-stable/drivers/s390/net/qeth_l3_main.c
Stefan Raspl 2efaf5ff7f qeth: fix deadlock between recovery and bonding driver 
The recovery thread, when failing, tears down the respective interface. To do
so, it needs to obtain the rtnl lock first, as the interface configuration is
changed.
If another process tries to modify an interface setting at the same time, that
process can obtain the rtnl lock first, but the respective callback in the qeth
driver will block until recovery has completed - which cannot happen since the
calling process already obtained it.
In one particular case, the bonding driver acquired the rtnl lock to modify the
card's MAC address, while the recovery failed at the same time due to the card
being removed. Hence qeth_l2_set_mac_address (implicitly holding the rtnl lock)
was waiting on qeth_l2_recover, which deadlocked when waiting on the rtnl lock.
This patch uses rtnl_trylock instead of rtnl_lock in the recovery thread. If the
lock cannot be obtained, the interface will be left up, but the card state
remains in CARD_STATE_RECOVER, which will prevent any further activities on the
card.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-10-16 14:41:46 -04:00

3742 lines
96 KiB
C
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/*
* Copyright IBM Corp. 2007, 2009
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
* Frank Pavlic <fpavlic@de.ibm.com>,
* Thomas Spatzier <tspat@de.ibm.com>,
* Frank Blaschka <frank.blaschka@de.ibm.com>
*/
#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/bitops.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/mii.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <net/ip.h>
#include <net/arp.h>
#include <net/route.h>
#include <net/ip6_fib.h>
#include <net/ip6_checksum.h>
#include <net/iucv/af_iucv.h>
#include "qeth_l3.h"
static int qeth_l3_set_offline(struct ccwgroup_device *);
static int qeth_l3_recover(void *);
static int qeth_l3_stop(struct net_device *);
static void qeth_l3_set_multicast_list(struct net_device *);
static int qeth_l3_neigh_setup(struct net_device *, struct neigh_parms *);
static int qeth_l3_register_addr_entry(struct qeth_card *,
struct qeth_ipaddr *);
static int qeth_l3_deregister_addr_entry(struct qeth_card *,
struct qeth_ipaddr *);
static int __qeth_l3_set_online(struct ccwgroup_device *, int);
static int __qeth_l3_set_offline(struct ccwgroup_device *, int);
static int qeth_l3_isxdigit(char *buf)
{
while (*buf) {
if (!isxdigit(*buf++))
return 0;
}
return 1;
}
void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
{
sprintf(buf, "%i.%i.%i.%i", addr[0], addr[1], addr[2], addr[3]);
}
int qeth_l3_string_to_ipaddr4(const char *buf, __u8 *addr)
{
int count = 0, rc = 0;
int in[4];
char c;
rc = sscanf(buf, "%u.%u.%u.%u%c",
&in[0], &in[1], &in[2], &in[3], &c);
if (rc != 4 && (rc != 5 || c != '\n'))
return -EINVAL;
for (count = 0; count < 4; count++) {
if (in[count] > 255)
return -EINVAL;
addr[count] = in[count];
}
return 0;
}
void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
{
sprintf(buf, "%pI6", addr);
}
int qeth_l3_string_to_ipaddr6(const char *buf, __u8 *addr)
{
const char *end, *end_tmp, *start;
__u16 *in;
char num[5];
int num2, cnt, out, found, save_cnt;
unsigned short in_tmp[8] = {0, };
cnt = out = found = save_cnt = num2 = 0;
end = start = buf;
in = (__u16 *) addr;
memset(in, 0, 16);
while (*end) {
end = strchr(start, ':');
if (end == NULL) {
end = buf + strlen(buf);
end_tmp = strchr(start, '\n');
if (end_tmp != NULL)
end = end_tmp;
out = 1;
}
if ((end - start)) {
memset(num, 0, 5);
if ((end - start) > 4)
return -EINVAL;
memcpy(num, start, end - start);
if (!qeth_l3_isxdigit(num))
return -EINVAL;
sscanf(start, "%x", &num2);
if (found)
in_tmp[save_cnt++] = num2;
else
in[cnt++] = num2;
if (out)
break;
} else {
if (found)
return -EINVAL;
found = 1;
}
start = ++end;
}
if (cnt + save_cnt > 8)
return -EINVAL;
cnt = 7;
while (save_cnt)
in[cnt--] = in_tmp[--save_cnt];
return 0;
}
void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
char *buf)
{
if (proto == QETH_PROT_IPV4)
qeth_l3_ipaddr4_to_string(addr, buf);
else if (proto == QETH_PROT_IPV6)
qeth_l3_ipaddr6_to_string(addr, buf);
}
int qeth_l3_string_to_ipaddr(const char *buf, enum qeth_prot_versions proto,
__u8 *addr)
{
if (proto == QETH_PROT_IPV4)
return qeth_l3_string_to_ipaddr4(buf, addr);
else if (proto == QETH_PROT_IPV6)
return qeth_l3_string_to_ipaddr6(buf, addr);
else
return -EINVAL;
}
static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
{
int i, j;
u8 octet;
for (i = 0; i < len; ++i) {
octet = addr[i];
for (j = 7; j >= 0; --j) {
bits[i*8 + j] = octet & 1;
octet >>= 1;
}
}
}
int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
struct qeth_ipato_entry *ipatoe;
u8 addr_bits[128] = {0, };
u8 ipatoe_bits[128] = {0, };
int rc = 0;
if (!card->ipato.enabled)
return 0;
qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
(addr->proto == QETH_PROT_IPV4)? 4:16);
list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
if (addr->proto != ipatoe->proto)
continue;
qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
(ipatoe->proto == QETH_PROT_IPV4) ?
4 : 16);
if (addr->proto == QETH_PROT_IPV4)
rc = !memcmp(addr_bits, ipatoe_bits,
min(32, ipatoe->mask_bits));
else
rc = !memcmp(addr_bits, ipatoe_bits,
min(128, ipatoe->mask_bits));
if (rc)
break;
}
/* invert? */
if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
rc = !rc;
else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
rc = !rc;
return rc;
}
/*
* Add IP to be added to todo list. If there is already an "add todo"
* in this list we just incremenent the reference count.
* Returns 0 if we just incremented reference count.
*/
static int __qeth_l3_insert_ip_todo(struct qeth_card *card,
struct qeth_ipaddr *addr, int add)
{
struct qeth_ipaddr *tmp, *t;
int found = 0;
if (card->options.sniffer)
return 0;
list_for_each_entry_safe(tmp, t, card->ip_tbd_list, entry) {
if ((addr->type == QETH_IP_TYPE_DEL_ALL_MC) &&
(tmp->type == QETH_IP_TYPE_DEL_ALL_MC))
return 0;
if ((tmp->proto == QETH_PROT_IPV4) &&
(addr->proto == QETH_PROT_IPV4) &&
(tmp->type == addr->type) &&
(tmp->is_multicast == addr->is_multicast) &&
(tmp->u.a4.addr == addr->u.a4.addr) &&
(tmp->u.a4.mask == addr->u.a4.mask)) {
found = 1;
break;
}
if ((tmp->proto == QETH_PROT_IPV6) &&
(addr->proto == QETH_PROT_IPV6) &&
(tmp->type == addr->type) &&
(tmp->is_multicast == addr->is_multicast) &&
(tmp->u.a6.pfxlen == addr->u.a6.pfxlen) &&
(memcmp(&tmp->u.a6.addr, &addr->u.a6.addr,
sizeof(struct in6_addr)) == 0)) {
found = 1;
break;
}
}
if (found) {
if (addr->users != 0)
tmp->users += addr->users;
else
tmp->users += add ? 1 : -1;
if (tmp->users == 0) {
list_del(&tmp->entry);
kfree(tmp);
}
return 0;
} else {
if (addr->type == QETH_IP_TYPE_DEL_ALL_MC)
list_add(&addr->entry, card->ip_tbd_list);
else {
if (addr->users == 0)
addr->users += add ? 1 : -1;
if (add && (addr->type == QETH_IP_TYPE_NORMAL) &&
qeth_l3_is_addr_covered_by_ipato(card, addr)) {
QETH_CARD_TEXT(card, 2, "tkovaddr");
addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
}
list_add_tail(&addr->entry, card->ip_tbd_list);
}
return 1;
}
}
int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
{
unsigned long flags;
int rc = 0;
QETH_CARD_TEXT(card, 4, "delip");
if (addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &addr->u.a4.addr, 4);
else {
QETH_CARD_HEX(card, 4, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 4, ((char *)&addr->u.a6.addr) + 8, 8);
}
spin_lock_irqsave(&card->ip_lock, flags);
rc = __qeth_l3_insert_ip_todo(card, addr, 0);
spin_unlock_irqrestore(&card->ip_lock, flags);
return rc;
}
int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
{
unsigned long flags;
int rc = 0;
QETH_CARD_TEXT(card, 4, "addip");
if (addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &addr->u.a4.addr, 4);
else {
QETH_CARD_HEX(card, 4, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 4, ((char *)&addr->u.a6.addr) + 8, 8);
}
spin_lock_irqsave(&card->ip_lock, flags);
rc = __qeth_l3_insert_ip_todo(card, addr, 1);
spin_unlock_irqrestore(&card->ip_lock, flags);
return rc;
}
struct qeth_ipaddr *qeth_l3_get_addr_buffer(
enum qeth_prot_versions prot)
{
struct qeth_ipaddr *addr;
addr = kzalloc(sizeof(struct qeth_ipaddr), GFP_ATOMIC);
if (addr == NULL) {
return NULL;
}
addr->type = QETH_IP_TYPE_NORMAL;
addr->proto = prot;
return addr;
}
static void qeth_l3_delete_mc_addresses(struct qeth_card *card)
{
struct qeth_ipaddr *iptodo;
unsigned long flags;
QETH_CARD_TEXT(card, 4, "delmc");
iptodo = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
if (!iptodo) {
QETH_CARD_TEXT(card, 2, "dmcnomem");
return;
}
iptodo->type = QETH_IP_TYPE_DEL_ALL_MC;
spin_lock_irqsave(&card->ip_lock, flags);
if (!__qeth_l3_insert_ip_todo(card, iptodo, 0))
kfree(iptodo);
spin_unlock_irqrestore(&card->ip_lock, flags);
}
/*
* Add/remove address to/from card's ip list, i.e. try to add or remove
* reference to/from an IP address that is already registered on the card.
* Returns:
* 0 address was on card and its reference count has been adjusted,
* but is still > 0, so nothing has to be done
* also returns 0 if card was not on card and the todo was to delete
* the address -> there is also nothing to be done
* 1 address was not on card and the todo is to add it to the card's ip
* list
* -1 address was on card and its reference count has been decremented
* to <= 0 by the todo -> address must be removed from card
*/
static int __qeth_l3_ref_ip_on_card(struct qeth_card *card,
struct qeth_ipaddr *todo, struct qeth_ipaddr **__addr)
{
struct qeth_ipaddr *addr;
int found = 0;
list_for_each_entry(addr, &card->ip_list, entry) {
if ((addr->proto == QETH_PROT_IPV4) &&
(todo->proto == QETH_PROT_IPV4) &&
(addr->type == todo->type) &&
(addr->u.a4.addr == todo->u.a4.addr) &&
(addr->u.a4.mask == todo->u.a4.mask)) {
found = 1;
break;
}
if ((addr->proto == QETH_PROT_IPV6) &&
(todo->proto == QETH_PROT_IPV6) &&
(addr->type == todo->type) &&
(addr->u.a6.pfxlen == todo->u.a6.pfxlen) &&
(memcmp(&addr->u.a6.addr, &todo->u.a6.addr,
sizeof(struct in6_addr)) == 0)) {
found = 1;
break;
}
}
if (found) {
addr->users += todo->users;
if (addr->users <= 0) {
*__addr = addr;
return -1;
} else {
/* for VIPA and RXIP limit refcount to 1 */
if (addr->type != QETH_IP_TYPE_NORMAL)
addr->users = 1;
return 0;
}
}
if (todo->users > 0) {
/* for VIPA and RXIP limit refcount to 1 */
if (todo->type != QETH_IP_TYPE_NORMAL)
todo->users = 1;
return 1;
} else
return 0;
}
static void __qeth_l3_delete_all_mc(struct qeth_card *card,
unsigned long *flags)
{
struct list_head fail_list;
struct qeth_ipaddr *addr, *tmp;
int rc;
INIT_LIST_HEAD(&fail_list);
again:
list_for_each_entry_safe(addr, tmp, &card->ip_list, entry) {
if (addr->is_multicast) {
list_del(&addr->entry);
spin_unlock_irqrestore(&card->ip_lock, *flags);
rc = qeth_l3_deregister_addr_entry(card, addr);
spin_lock_irqsave(&card->ip_lock, *flags);
if (!rc || (rc == IPA_RC_MC_ADDR_NOT_FOUND))
kfree(addr);
else
list_add_tail(&addr->entry, &fail_list);
goto again;
}
}
list_splice(&fail_list, &card->ip_list);
}
void qeth_l3_set_ip_addr_list(struct qeth_card *card)
{
struct list_head *tbd_list;
struct qeth_ipaddr *todo, *addr;
unsigned long flags;
int rc;
QETH_CARD_TEXT(card, 2, "sdiplist");
QETH_CARD_HEX(card, 2, &card, sizeof(void *));
if ((card->state != CARD_STATE_UP &&
card->state != CARD_STATE_SOFTSETUP) || card->options.sniffer) {
return;
}
spin_lock_irqsave(&card->ip_lock, flags);
tbd_list = card->ip_tbd_list;
card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
if (!card->ip_tbd_list) {
QETH_CARD_TEXT(card, 0, "silnomem");
card->ip_tbd_list = tbd_list;
spin_unlock_irqrestore(&card->ip_lock, flags);
return;
} else
INIT_LIST_HEAD(card->ip_tbd_list);
while (!list_empty(tbd_list)) {
todo = list_entry(tbd_list->next, struct qeth_ipaddr, entry);
list_del(&todo->entry);
if (todo->type == QETH_IP_TYPE_DEL_ALL_MC) {
__qeth_l3_delete_all_mc(card, &flags);
kfree(todo);
continue;
}
rc = __qeth_l3_ref_ip_on_card(card, todo, &addr);
if (rc == 0) {
/* nothing to be done; only adjusted refcount */
kfree(todo);
} else if (rc == 1) {
/* new entry to be added to on-card list */
spin_unlock_irqrestore(&card->ip_lock, flags);
rc = qeth_l3_register_addr_entry(card, todo);
spin_lock_irqsave(&card->ip_lock, flags);
if (!rc || (rc == IPA_RC_LAN_OFFLINE))
list_add_tail(&todo->entry, &card->ip_list);
else
kfree(todo);
} else if (rc == -1) {
/* on-card entry to be removed */
list_del_init(&addr->entry);
spin_unlock_irqrestore(&card->ip_lock, flags);
rc = qeth_l3_deregister_addr_entry(card, addr);
spin_lock_irqsave(&card->ip_lock, flags);
if (!rc || (rc == IPA_RC_IP_ADDRESS_NOT_DEFINED))
kfree(addr);
else
list_add_tail(&addr->entry, &card->ip_list);
kfree(todo);
}
}
spin_unlock_irqrestore(&card->ip_lock, flags);
kfree(tbd_list);
}
static void qeth_l3_clear_ip_list(struct qeth_card *card, int recover)
{
struct qeth_ipaddr *addr, *tmp;
unsigned long flags;
QETH_CARD_TEXT(card, 4, "clearip");
if (recover && card->options.sniffer)
return;
spin_lock_irqsave(&card->ip_lock, flags);
/* clear todo list */
list_for_each_entry_safe(addr, tmp, card->ip_tbd_list, entry) {
list_del(&addr->entry);
kfree(addr);
}
while (!list_empty(&card->ip_list)) {
addr = list_entry(card->ip_list.next,
struct qeth_ipaddr, entry);
list_del_init(&addr->entry);
if (!recover || addr->is_multicast) {
kfree(addr);
continue;
}
list_add_tail(&addr->entry, card->ip_tbd_list);
}
spin_unlock_irqrestore(&card->ip_lock, flags);
}
static int qeth_l3_address_exists_in_list(struct list_head *list,
struct qeth_ipaddr *addr, int same_type)
{
struct qeth_ipaddr *tmp;
list_for_each_entry(tmp, list, entry) {
if ((tmp->proto == QETH_PROT_IPV4) &&
(addr->proto == QETH_PROT_IPV4) &&
((same_type && (tmp->type == addr->type)) ||
(!same_type && (tmp->type != addr->type))) &&
(tmp->u.a4.addr == addr->u.a4.addr))
return 1;
if ((tmp->proto == QETH_PROT_IPV6) &&
(addr->proto == QETH_PROT_IPV6) &&
((same_type && (tmp->type == addr->type)) ||
(!same_type && (tmp->type != addr->type))) &&
(memcmp(&tmp->u.a6.addr, &addr->u.a6.addr,
sizeof(struct in6_addr)) == 0))
return 1;
}
return 0;
}
static int qeth_l3_send_setdelmc(struct qeth_card *card,
struct qeth_ipaddr *addr, int ipacmd)
{
int rc;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "setdelmc");
iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
memcpy(&cmd->data.setdelipm.mac, addr->mac, OSA_ADDR_LEN);
if (addr->proto == QETH_PROT_IPV6)
memcpy(cmd->data.setdelipm.ip6, &addr->u.a6.addr,
sizeof(struct in6_addr));
else
memcpy(&cmd->data.setdelipm.ip4, &addr->u.a4.addr, 4);
rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
return rc;
}
static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
{
int i, j;
for (i = 0; i < 16; i++) {
j = (len) - (i * 8);
if (j >= 8)
netmask[i] = 0xff;
else if (j > 0)
netmask[i] = (u8)(0xFF00 >> j);
else
netmask[i] = 0;
}
}
static int qeth_l3_send_setdelip(struct qeth_card *card,
struct qeth_ipaddr *addr, int ipacmd, unsigned int flags)
{
int rc;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
__u8 netmask[16];
QETH_CARD_TEXT(card, 4, "setdelip");
QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
if (addr->proto == QETH_PROT_IPV6) {
memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
sizeof(struct in6_addr));
qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
memcpy(cmd->data.setdelip6.mask, netmask,
sizeof(struct in6_addr));
cmd->data.setdelip6.flags = flags;
} else {
memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
cmd->data.setdelip4.flags = flags;
}
rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
return rc;
}
static int qeth_l3_send_setrouting(struct qeth_card *card,
enum qeth_routing_types type, enum qeth_prot_versions prot)
{
int rc;
struct qeth_ipa_cmd *cmd;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 4, "setroutg");
iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETRTG, prot);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
cmd->data.setrtg.type = (type);
rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
return rc;
}
static void qeth_l3_correct_routing_type(struct qeth_card *card,
enum qeth_routing_types *type, enum qeth_prot_versions prot)
{
if (card->info.type == QETH_CARD_TYPE_IQD) {
switch (*type) {
case NO_ROUTER:
case PRIMARY_CONNECTOR:
case SECONDARY_CONNECTOR:
case MULTICAST_ROUTER:
return;
default:
goto out_inval;
}
} else {
switch (*type) {
case NO_ROUTER:
case PRIMARY_ROUTER:
case SECONDARY_ROUTER:
return;
case MULTICAST_ROUTER:
if (qeth_is_ipafunc_supported(card, prot,
IPA_OSA_MC_ROUTER))
return;
default:
goto out_inval;
}
}
out_inval:
*type = NO_ROUTER;
}
int qeth_l3_setrouting_v4(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "setrtg4");
qeth_l3_correct_routing_type(card, &card->options.route4.type,
QETH_PROT_IPV4);
rc = qeth_l3_send_setrouting(card, card->options.route4.type,
QETH_PROT_IPV4);
if (rc) {
card->options.route4.type = NO_ROUTER;
QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
" on %s. Type set to 'no router'.\n", rc,
QETH_CARD_IFNAME(card));
}
return rc;
}
int qeth_l3_setrouting_v6(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "setrtg6");
#ifdef CONFIG_QETH_IPV6
if (!qeth_is_supported(card, IPA_IPV6))
return 0;
qeth_l3_correct_routing_type(card, &card->options.route6.type,
QETH_PROT_IPV6);
rc = qeth_l3_send_setrouting(card, card->options.route6.type,
QETH_PROT_IPV6);
if (rc) {
card->options.route6.type = NO_ROUTER;
QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
" on %s. Type set to 'no router'.\n", rc,
QETH_CARD_IFNAME(card));
}
#endif
return rc;
}
/*
* IP address takeover related functions
*/
static void qeth_l3_clear_ipato_list(struct qeth_card *card)
{
struct qeth_ipato_entry *ipatoe, *tmp;
unsigned long flags;
spin_lock_irqsave(&card->ip_lock, flags);
list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
list_del(&ipatoe->entry);
kfree(ipatoe);
}
spin_unlock_irqrestore(&card->ip_lock, flags);
}
int qeth_l3_add_ipato_entry(struct qeth_card *card,
struct qeth_ipato_entry *new)
{
struct qeth_ipato_entry *ipatoe;
unsigned long flags;
int rc = 0;
QETH_CARD_TEXT(card, 2, "addipato");
spin_lock_irqsave(&card->ip_lock, flags);
list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
if (ipatoe->proto != new->proto)
continue;
if (!memcmp(ipatoe->addr, new->addr,
(ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
(ipatoe->mask_bits == new->mask_bits)) {
rc = -EEXIST;
break;
}
}
if (!rc)
list_add_tail(&new->entry, &card->ipato.entries);
spin_unlock_irqrestore(&card->ip_lock, flags);
return rc;
}
void qeth_l3_del_ipato_entry(struct qeth_card *card,
enum qeth_prot_versions proto, u8 *addr, int mask_bits)
{
struct qeth_ipato_entry *ipatoe, *tmp;
unsigned long flags;
QETH_CARD_TEXT(card, 2, "delipato");
spin_lock_irqsave(&card->ip_lock, flags);
list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
if (ipatoe->proto != proto)
continue;
if (!memcmp(ipatoe->addr, addr,
(proto == QETH_PROT_IPV4)? 4:16) &&
(ipatoe->mask_bits == mask_bits)) {
list_del(&ipatoe->entry);
kfree(ipatoe);
}
}
spin_unlock_irqrestore(&card->ip_lock, flags);
}
/*
* VIPA related functions
*/
int qeth_l3_add_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
const u8 *addr)
{
struct qeth_ipaddr *ipaddr;
unsigned long flags;
int rc = 0;
ipaddr = qeth_l3_get_addr_buffer(proto);
if (ipaddr) {
if (proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "addvipa4");
memcpy(&ipaddr->u.a4.addr, addr, 4);
ipaddr->u.a4.mask = 0;
} else if (proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "addvipa6");
memcpy(&ipaddr->u.a6.addr, addr, 16);
ipaddr->u.a6.pfxlen = 0;
}
ipaddr->type = QETH_IP_TYPE_VIPA;
ipaddr->set_flags = QETH_IPA_SETIP_VIPA_FLAG;
ipaddr->del_flags = QETH_IPA_DELIP_VIPA_FLAG;
} else
return -ENOMEM;
spin_lock_irqsave(&card->ip_lock, flags);
if (qeth_l3_address_exists_in_list(&card->ip_list, ipaddr, 0) ||
qeth_l3_address_exists_in_list(card->ip_tbd_list, ipaddr, 0))
rc = -EEXIST;
spin_unlock_irqrestore(&card->ip_lock, flags);
if (rc) {
kfree(ipaddr);
return rc;
}
if (!qeth_l3_add_ip(card, ipaddr))
kfree(ipaddr);
qeth_l3_set_ip_addr_list(card);
return rc;
}
void qeth_l3_del_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
const u8 *addr)
{
struct qeth_ipaddr *ipaddr;
ipaddr = qeth_l3_get_addr_buffer(proto);
if (ipaddr) {
if (proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "delvipa4");
memcpy(&ipaddr->u.a4.addr, addr, 4);
ipaddr->u.a4.mask = 0;
} else if (proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "delvipa6");
memcpy(&ipaddr->u.a6.addr, addr, 16);
ipaddr->u.a6.pfxlen = 0;
}
ipaddr->type = QETH_IP_TYPE_VIPA;
} else
return;
if (!qeth_l3_delete_ip(card, ipaddr))
kfree(ipaddr);
qeth_l3_set_ip_addr_list(card);
}
/*
* proxy ARP related functions
*/
int qeth_l3_add_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
const u8 *addr)
{
struct qeth_ipaddr *ipaddr;
unsigned long flags;
int rc = 0;
ipaddr = qeth_l3_get_addr_buffer(proto);
if (ipaddr) {
if (proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "addrxip4");
memcpy(&ipaddr->u.a4.addr, addr, 4);
ipaddr->u.a4.mask = 0;
} else if (proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "addrxip6");
memcpy(&ipaddr->u.a6.addr, addr, 16);
ipaddr->u.a6.pfxlen = 0;
}
ipaddr->type = QETH_IP_TYPE_RXIP;
ipaddr->set_flags = QETH_IPA_SETIP_TAKEOVER_FLAG;
ipaddr->del_flags = 0;
} else
return -ENOMEM;
spin_lock_irqsave(&card->ip_lock, flags);
if (qeth_l3_address_exists_in_list(&card->ip_list, ipaddr, 0) ||
qeth_l3_address_exists_in_list(card->ip_tbd_list, ipaddr, 0))
rc = -EEXIST;
spin_unlock_irqrestore(&card->ip_lock, flags);
if (rc) {
kfree(ipaddr);
return rc;
}
if (!qeth_l3_add_ip(card, ipaddr))
kfree(ipaddr);
qeth_l3_set_ip_addr_list(card);
return 0;
}
void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
const u8 *addr)
{
struct qeth_ipaddr *ipaddr;
ipaddr = qeth_l3_get_addr_buffer(proto);
if (ipaddr) {
if (proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "addrxip4");
memcpy(&ipaddr->u.a4.addr, addr, 4);
ipaddr->u.a4.mask = 0;
} else if (proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "addrxip6");
memcpy(&ipaddr->u.a6.addr, addr, 16);
ipaddr->u.a6.pfxlen = 0;
}
ipaddr->type = QETH_IP_TYPE_RXIP;
} else
return;
if (!qeth_l3_delete_ip(card, ipaddr))
kfree(ipaddr);
qeth_l3_set_ip_addr_list(card);
}
static int qeth_l3_register_addr_entry(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
char buf[50];
int rc = 0;
int cnt = 3;
if (addr->proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "setaddr4");
QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
} else if (addr->proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "setaddr6");
QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
} else {
QETH_CARD_TEXT(card, 2, "setaddr?");
QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
}
do {
if (addr->is_multicast)
rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
else
rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP,
addr->set_flags);
if (rc)
QETH_CARD_TEXT(card, 2, "failed");
} while ((--cnt > 0) && rc);
if (rc) {
QETH_CARD_TEXT(card, 2, "FAILED");
qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
dev_warn(&card->gdev->dev,
"Registering IP address %s failed\n", buf);
}
return rc;
}
static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
struct qeth_ipaddr *addr)
{
int rc = 0;
if (addr->proto == QETH_PROT_IPV4) {
QETH_CARD_TEXT(card, 2, "deladdr4");
QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
} else if (addr->proto == QETH_PROT_IPV6) {
QETH_CARD_TEXT(card, 2, "deladdr6");
QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
} else {
QETH_CARD_TEXT(card, 2, "deladdr?");
QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
}
if (addr->is_multicast)
rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
else
rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP,
addr->del_flags);
if (rc)
QETH_CARD_TEXT(card, 2, "failed");
return rc;
}
static inline u8 qeth_l3_get_qeth_hdr_flags4(int cast_type)
{
if (cast_type == RTN_MULTICAST)
return QETH_CAST_MULTICAST;
if (cast_type == RTN_BROADCAST)
return QETH_CAST_BROADCAST;
return QETH_CAST_UNICAST;
}
static inline u8 qeth_l3_get_qeth_hdr_flags6(int cast_type)
{
u8 ct = QETH_HDR_PASSTHRU | QETH_HDR_IPV6;
if (cast_type == RTN_MULTICAST)
return ct | QETH_CAST_MULTICAST;
if (cast_type == RTN_ANYCAST)
return ct | QETH_CAST_ANYCAST;
if (cast_type == RTN_BROADCAST)
return ct | QETH_CAST_BROADCAST;
return ct | QETH_CAST_UNICAST;
}
static int qeth_l3_setadapter_parms(struct qeth_card *card)
{
int rc;
QETH_DBF_TEXT(SETUP, 2, "setadprm");
if (!qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
dev_info(&card->gdev->dev,
"set adapter parameters not supported.\n");
QETH_DBF_TEXT(SETUP, 2, " notsupp");
return 0;
}
rc = qeth_query_setadapterparms(card);
if (rc) {
QETH_DBF_MESSAGE(2, "%s couldn't set adapter parameters: "
"0x%x\n", dev_name(&card->gdev->dev), rc);
return rc;
}
if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
rc = qeth_setadpparms_change_macaddr(card);
if (rc)
dev_warn(&card->gdev->dev, "Reading the adapter MAC"
" address failed\n");
}
return rc;
}
static int qeth_l3_default_setassparms_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "defadpcb");
cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code == 0) {
cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
if (cmd->hdr.prot_version == QETH_PROT_IPV4)
card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
if (cmd->hdr.prot_version == QETH_PROT_IPV6)
card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
}
if (cmd->data.setassparms.hdr.assist_no == IPA_INBOUND_CHECKSUM &&
cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
card->info.csum_mask = cmd->data.setassparms.data.flags_32bit;
QETH_CARD_TEXT_(card, 3, "csum:%d", card->info.csum_mask);
}
if (cmd->data.setassparms.hdr.assist_no == IPA_OUTBOUND_CHECKSUM &&
cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
card->info.tx_csum_mask =
cmd->data.setassparms.data.flags_32bit;
QETH_CARD_TEXT_(card, 3, "tcsu:%d", card->info.tx_csum_mask);
}
return 0;
}
static struct qeth_cmd_buffer *qeth_l3_get_setassparms_cmd(
struct qeth_card *card, enum qeth_ipa_funcs ipa_func, __u16 cmd_code,
__u16 len, enum qeth_prot_versions prot)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "getasscm");
iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
cmd->data.setassparms.hdr.assist_no = ipa_func;
cmd->data.setassparms.hdr.length = 8 + len;
cmd->data.setassparms.hdr.command_code = cmd_code;
cmd->data.setassparms.hdr.return_code = 0;
cmd->data.setassparms.hdr.seq_no = 0;
return iob;
}
static int qeth_l3_send_setassparms(struct qeth_card *card,
struct qeth_cmd_buffer *iob, __u16 len, long data,
int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
unsigned long),
void *reply_param)
{
int rc;
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 4, "sendassp");
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
if (len <= sizeof(__u32))
cmd->data.setassparms.data.flags_32bit = (__u32) data;
else /* (len > sizeof(__u32)) */
memcpy(&cmd->data.setassparms.data, (void *) data, len);
rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
return rc;
}
#ifdef CONFIG_QETH_IPV6
static int qeth_l3_send_simple_setassparms_ipv6(struct qeth_card *card,
enum qeth_ipa_funcs ipa_func, __u16 cmd_code)
{
int rc;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 4, "simassp6");
iob = qeth_l3_get_setassparms_cmd(card, ipa_func, cmd_code,
0, QETH_PROT_IPV6);
rc = qeth_l3_send_setassparms(card, iob, 0, 0,
qeth_l3_default_setassparms_cb, NULL);
return rc;
}
#endif
static int qeth_l3_send_simple_setassparms(struct qeth_card *card,
enum qeth_ipa_funcs ipa_func, __u16 cmd_code, long data)
{
int rc;
int length = 0;
struct qeth_cmd_buffer *iob;
QETH_CARD_TEXT(card, 4, "simassp4");
if (data)
length = sizeof(__u32);
iob = qeth_l3_get_setassparms_cmd(card, ipa_func, cmd_code,
length, QETH_PROT_IPV4);
rc = qeth_l3_send_setassparms(card, iob, length, data,
qeth_l3_default_setassparms_cb, NULL);
return rc;
}
static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "ipaarp");
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
dev_info(&card->gdev->dev,
"ARP processing not supported on %s!\n",
QETH_CARD_IFNAME(card));
return 0;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting ARP processing support for %s failed\n",
QETH_CARD_IFNAME(card));
}
return rc;
}
static int qeth_l3_start_ipa_ip_fragmentation(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "ipaipfrg");
if (!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) {
dev_info(&card->gdev->dev,
"Hardware IP fragmentation not supported on %s\n",
QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_IP_FRAGMENTATION,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting IP fragmentation support for %s failed\n",
QETH_CARD_IFNAME(card));
} else
dev_info(&card->gdev->dev,
"Hardware IP fragmentation enabled \n");
return rc;
}
static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "stsrcmac");
if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
dev_info(&card->gdev->dev,
"Inbound source MAC-address not supported on %s\n",
QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_SOURCE_MAC,
IPA_CMD_ASS_START, 0);
if (rc)
dev_warn(&card->gdev->dev,
"Starting source MAC-address support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "strtvlan");
if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
dev_info(&card->gdev->dev,
"VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_VLAN_PRIO,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting VLAN support for %s failed\n",
QETH_CARD_IFNAME(card));
} else {
dev_info(&card->gdev->dev, "VLAN enabled\n");
}
return rc;
}
static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "stmcast");
if (!qeth_is_supported(card, IPA_MULTICASTING)) {
dev_info(&card->gdev->dev,
"Multicast not supported on %s\n",
QETH_CARD_IFNAME(card));
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_MULTICASTING,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev,
"Starting multicast support for %s failed\n",
QETH_CARD_IFNAME(card));
} else {
dev_info(&card->gdev->dev, "Multicast enabled\n");
card->dev->flags |= IFF_MULTICAST;
}
return rc;
}
#ifdef CONFIG_QETH_IPV6
static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "softipv6");
if (card->info.type == QETH_CARD_TYPE_IQD)
goto out;
rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
if (rc) {
dev_err(&card->gdev->dev,
"Activating IPv6 support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_IPV6,
IPA_CMD_ASS_START, 3);
if (rc) {
dev_err(&card->gdev->dev,
"Activating IPv6 support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_l3_send_simple_setassparms_ipv6(card, IPA_IPV6,
IPA_CMD_ASS_START);
if (rc) {
dev_err(&card->gdev->dev,
"Activating IPv6 support for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_l3_send_simple_setassparms_ipv6(card, IPA_PASSTHRU,
IPA_CMD_ASS_START);
if (rc) {
dev_warn(&card->gdev->dev,
"Enabling the passthrough mode for %s failed\n",
QETH_CARD_IFNAME(card));
return rc;
}
out:
dev_info(&card->gdev->dev, "IPV6 enabled\n");
return 0;
}
#endif
static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
{
int rc = 0;
QETH_CARD_TEXT(card, 3, "strtipv6");
if (!qeth_is_supported(card, IPA_IPV6)) {
dev_info(&card->gdev->dev,
"IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
return 0;
}
#ifdef CONFIG_QETH_IPV6
rc = qeth_l3_softsetup_ipv6(card);
#endif
return rc ;
}
static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "stbrdcst");
card->info.broadcast_capable = 0;
if (!qeth_is_supported(card, IPA_FILTERING)) {
dev_info(&card->gdev->dev,
"Broadcast not supported on %s\n",
QETH_CARD_IFNAME(card));
rc = -EOPNOTSUPP;
goto out;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
"%s failed\n", QETH_CARD_IFNAME(card));
goto out;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_CONFIGURE, 1);
if (rc) {
dev_warn(&card->gdev->dev,
"Setting up broadcast filtering for %s failed\n",
QETH_CARD_IFNAME(card));
goto out;
}
card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
dev_info(&card->gdev->dev, "Broadcast enabled\n");
rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
IPA_CMD_ASS_ENABLE, 1);
if (rc) {
dev_warn(&card->gdev->dev, "Setting up broadcast echo "
"filtering for %s failed\n", QETH_CARD_IFNAME(card));
goto out;
}
card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
out:
if (card->info.broadcast_capable)
card->dev->flags |= IFF_BROADCAST;
else
card->dev->flags &= ~IFF_BROADCAST;
return rc;
}
static int qeth_l3_send_checksum_command(struct qeth_card *card)
{
int rc;
rc = qeth_l3_send_simple_setassparms(card, IPA_INBOUND_CHECKSUM,
IPA_CMD_ASS_START, 0);
if (rc) {
dev_warn(&card->gdev->dev, "Starting HW checksumming for %s "
"failed, using SW checksumming\n",
QETH_CARD_IFNAME(card));
return rc;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_INBOUND_CHECKSUM,
IPA_CMD_ASS_ENABLE,
card->info.csum_mask);
if (rc) {
dev_warn(&card->gdev->dev, "Enabling HW checksumming for %s "
"failed, using SW checksumming\n",
QETH_CARD_IFNAME(card));
return rc;
}
return 0;
}
static int qeth_l3_set_rx_csum(struct qeth_card *card, int on)
{
int rc = 0;
if (on) {
rc = qeth_l3_send_checksum_command(card);
if (rc)
return -EIO;
dev_info(&card->gdev->dev,
"HW Checksumming (inbound) enabled\n");
} else {
rc = qeth_l3_send_simple_setassparms(card,
IPA_INBOUND_CHECKSUM, IPA_CMD_ASS_STOP, 0);
if (rc)
return -EIO;
}
return 0;
}
static int qeth_l3_start_ipa_checksum(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 3, "strtcsum");
if (card->dev->features & NETIF_F_RXCSUM) {
rtnl_lock();
/* force set_features call */
card->dev->features &= ~NETIF_F_RXCSUM;
netdev_update_features(card->dev);
rtnl_unlock();
}
return 0;
}
static int qeth_l3_start_ipa_tx_checksum(struct qeth_card *card)
{
int rc = 0;
if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
return rc;
rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_CHECKSUM,
IPA_CMD_ASS_START, 0);
if (rc)
goto err_out;
rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_CHECKSUM,
IPA_CMD_ASS_ENABLE, card->info.tx_csum_mask);
if (rc)
goto err_out;
dev_info(&card->gdev->dev, "HW TX Checksumming enabled\n");
return rc;
err_out:
dev_warn(&card->gdev->dev, "Enabling HW TX checksumming for %s "
"failed, using SW TX checksumming\n", QETH_CARD_IFNAME(card));
return rc;
}
static int qeth_l3_start_ipa_tso(struct qeth_card *card)
{
int rc;
QETH_CARD_TEXT(card, 3, "sttso");
if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
dev_info(&card->gdev->dev,
"Outbound TSO not supported on %s\n",
QETH_CARD_IFNAME(card));
rc = -EOPNOTSUPP;
} else {
rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
IPA_CMD_ASS_START, 0);
if (rc)
dev_warn(&card->gdev->dev, "Starting outbound TCP "
"segmentation offload for %s failed\n",
QETH_CARD_IFNAME(card));
else
dev_info(&card->gdev->dev,
"Outbound TSO enabled\n");
}
if (rc)
card->dev->features &= ~NETIF_F_TSO;
return rc;
}
static int qeth_l3_start_ipassists(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 3, "strtipas");
qeth_set_access_ctrl_online(card); /* go on*/
qeth_l3_start_ipa_arp_processing(card); /* go on*/
qeth_l3_start_ipa_ip_fragmentation(card); /* go on*/
qeth_l3_start_ipa_source_mac(card); /* go on*/
qeth_l3_start_ipa_vlan(card); /* go on*/
qeth_l3_start_ipa_multicast(card); /* go on*/
qeth_l3_start_ipa_ipv6(card); /* go on*/
qeth_l3_start_ipa_broadcast(card); /* go on*/
qeth_l3_start_ipa_checksum(card); /* go on*/
qeth_l3_start_ipa_tx_checksum(card);
qeth_l3_start_ipa_tso(card); /* go on*/
return 0;
}
static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code == 0)
memcpy(card->dev->dev_addr,
cmd->data.create_destroy_addr.unique_id, ETH_ALEN);
else
eth_random_addr(card->dev->dev_addr);
return 0;
}
static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
{
int rc = 0;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_DBF_TEXT(SETUP, 2, "hsrmac");
iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
QETH_PROT_IPV6);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
card->info.unique_id;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
NULL);
return rc;
}
static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code == 0)
card->info.unique_id = *((__u16 *)
&cmd->data.create_destroy_addr.unique_id[6]);
else {
card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
UNIQUE_ID_NOT_BY_CARD;
dev_warn(&card->gdev->dev, "The network adapter failed to "
"generate a unique ID\n");
}
return 0;
}
static int qeth_l3_get_unique_id(struct qeth_card *card)
{
int rc = 0;
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_DBF_TEXT(SETUP, 2, "guniqeid");
if (!qeth_is_supported(card, IPA_IPV6)) {
card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
UNIQUE_ID_NOT_BY_CARD;
return 0;
}
iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
QETH_PROT_IPV6);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
card->info.unique_id;
rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
return rc;
}
static int
qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd;
__u16 rc;
QETH_DBF_TEXT(SETUP, 2, "diastrcb");
cmd = (struct qeth_ipa_cmd *)data;
rc = cmd->hdr.return_code;
if (rc)
QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
switch (cmd->data.diagass.action) {
case QETH_DIAGS_CMD_TRACE_QUERY:
break;
case QETH_DIAGS_CMD_TRACE_DISABLE:
switch (rc) {
case 0:
case IPA_RC_INVALID_SUBCMD:
card->info.promisc_mode = SET_PROMISC_MODE_OFF;
dev_info(&card->gdev->dev, "The HiperSockets network "
"traffic analyzer is deactivated\n");
break;
default:
break;
}
break;
case QETH_DIAGS_CMD_TRACE_ENABLE:
switch (rc) {
case 0:
card->info.promisc_mode = SET_PROMISC_MODE_ON;
dev_info(&card->gdev->dev, "The HiperSockets network "
"traffic analyzer is activated\n");
break;
case IPA_RC_HARDWARE_AUTH_ERROR:
dev_warn(&card->gdev->dev, "The device is not "
"authorized to run as a HiperSockets network "
"traffic analyzer\n");
break;
case IPA_RC_TRACE_ALREADY_ACTIVE:
dev_warn(&card->gdev->dev, "A HiperSockets "
"network traffic analyzer is already "
"active in the HiperSockets LAN\n");
break;
default:
break;
}
break;
default:
QETH_DBF_MESSAGE(2, "Unknown sniffer action (0x%04x) on %s\n",
cmd->data.diagass.action, QETH_CARD_IFNAME(card));
}
return 0;
}
static int
qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
QETH_DBF_TEXT(SETUP, 2, "diagtrac");
iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
cmd->data.diagass.subcmd_len = 16;
cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRACE;
cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
cmd->data.diagass.action = 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,
struct net_device *dev)
{
ip_eth_mc_map(ipm, mac);
}
static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev)
{
struct qeth_ipaddr *ipm;
struct ip_mc_list *im4;
char buf[MAX_ADDR_LEN];
QETH_CARD_TEXT(card, 4, "addmc");
for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
im4 = rcu_dereference(im4->next_rcu)) {
qeth_l3_get_mac_for_ipm(im4->multiaddr, buf, in4_dev->dev);
ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
if (!ipm)
continue;
ipm->u.a4.addr = im4->multiaddr;
memcpy(ipm->mac, buf, OSA_ADDR_LEN);
ipm->is_multicast = 1;
if (!qeth_l3_add_ip(card, ipm))
kfree(ipm);
}
}
static void qeth_l3_add_vlan_mc(struct qeth_card *card)
{
struct in_device *in_dev;
u16 vid;
QETH_CARD_TEXT(card, 4, "addmcvl");
if (!qeth_is_supported(card, IPA_FULL_VLAN))
return;
for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
struct net_device *netdev;
rcu_read_lock();
netdev = __vlan_find_dev_deep(card->dev, vid);
rcu_read_unlock();
if (netdev == NULL ||
!(netdev->flags & IFF_UP))
continue;
in_dev = in_dev_get(netdev);
if (!in_dev)
continue;
rcu_read_lock();
qeth_l3_add_mc(card, in_dev);
rcu_read_unlock();
in_dev_put(in_dev);
}
}
static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
{
struct in_device *in4_dev;
QETH_CARD_TEXT(card, 4, "chkmcv4");
in4_dev = in_dev_get(card->dev);
if (in4_dev == NULL)
return;
rcu_read_lock();
qeth_l3_add_mc(card, in4_dev);
qeth_l3_add_vlan_mc(card);
rcu_read_unlock();
in_dev_put(in4_dev);
}
#ifdef CONFIG_QETH_IPV6
static void qeth_l3_add_mc6(struct qeth_card *card, struct inet6_dev *in6_dev)
{
struct qeth_ipaddr *ipm;
struct ifmcaddr6 *im6;
char buf[MAX_ADDR_LEN];
QETH_CARD_TEXT(card, 4, "addmc6");
for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
ndisc_mc_map(&im6->mca_addr, buf, in6_dev->dev, 0);
ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
if (!ipm)
continue;
ipm->is_multicast = 1;
memcpy(ipm->mac, buf, OSA_ADDR_LEN);
memcpy(&ipm->u.a6.addr, &im6->mca_addr.s6_addr,
sizeof(struct in6_addr));
if (!qeth_l3_add_ip(card, ipm))
kfree(ipm);
}
}
static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
{
struct inet6_dev *in_dev;
u16 vid;
QETH_CARD_TEXT(card, 4, "admc6vl");
if (!qeth_is_supported(card, IPA_FULL_VLAN))
return;
for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
struct net_device *netdev;
netdev = __vlan_find_dev_deep(card->dev, vid);
if (netdev == NULL ||
!(netdev->flags & IFF_UP))
continue;
in_dev = in6_dev_get(netdev);
if (!in_dev)
continue;
read_lock_bh(&in_dev->lock);
qeth_l3_add_mc6(card, in_dev);
read_unlock_bh(&in_dev->lock);
in6_dev_put(in_dev);
}
}
static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
{
struct inet6_dev *in6_dev;
QETH_CARD_TEXT(card, 4, "chkmcv6");
if (!qeth_is_supported(card, IPA_IPV6))
return ;
in6_dev = in6_dev_get(card->dev);
if (in6_dev == NULL)
return;
read_lock_bh(&in6_dev->lock);
qeth_l3_add_mc6(card, in6_dev);
qeth_l3_add_vlan_mc6(card);
read_unlock_bh(&in6_dev->lock);
in6_dev_put(in6_dev);
}
#endif /* CONFIG_QETH_IPV6 */
static void qeth_l3_free_vlan_addresses4(struct qeth_card *card,
unsigned short vid)
{
struct in_device *in_dev;
struct in_ifaddr *ifa;
struct qeth_ipaddr *addr;
struct net_device *netdev;
QETH_CARD_TEXT(card, 4, "frvaddr4");
netdev = __vlan_find_dev_deep(card->dev, vid);
if (!netdev)
return;
in_dev = in_dev_get(netdev);
if (!in_dev)
return;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
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->type = QETH_IP_TYPE_NORMAL;
if (!qeth_l3_delete_ip(card, addr))
kfree(addr);
}
}
in_dev_put(in_dev);
}
static void qeth_l3_free_vlan_addresses6(struct qeth_card *card,
unsigned short vid)
{
#ifdef CONFIG_QETH_IPV6
struct inet6_dev *in6_dev;
struct inet6_ifaddr *ifa;
struct qeth_ipaddr *addr;
struct net_device *netdev;
QETH_CARD_TEXT(card, 4, "frvaddr6");
netdev = __vlan_find_dev_deep(card->dev, vid);
if (!netdev)
return;
in6_dev = in6_dev_get(netdev);
if (!in6_dev)
return;
list_for_each_entry(ifa, &in6_dev->addr_list, if_list) {
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
if (addr) {
memcpy(&addr->u.a6.addr, &ifa->addr,
sizeof(struct in6_addr));
addr->u.a6.pfxlen = ifa->prefix_len;
addr->type = QETH_IP_TYPE_NORMAL;
if (!qeth_l3_delete_ip(card, addr))
kfree(addr);
}
}
in6_dev_put(in6_dev);
#endif /* CONFIG_QETH_IPV6 */
}
static void qeth_l3_free_vlan_addresses(struct qeth_card *card,
unsigned short vid)
{
qeth_l3_free_vlan_addresses4(card, vid);
qeth_l3_free_vlan_addresses6(card, vid);
}
static int qeth_l3_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
struct qeth_card *card = dev->ml_priv;
set_bit(vid, card->active_vlans);
return 0;
}
static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
struct qeth_card *card = dev->ml_priv;
unsigned long flags;
QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_CARD_TEXT(card, 3, "kidREC");
return 0;
}
spin_lock_irqsave(&card->vlanlock, flags);
/* unregister IP addresses of vlan device */
qeth_l3_free_vlan_addresses(card, vid);
clear_bit(vid, card->active_vlans);
spin_unlock_irqrestore(&card->vlanlock, flags);
qeth_l3_set_multicast_list(card->dev);
return 0;
}
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;
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);
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):
ndisc_mc_map((struct in6_addr *)
skb->data + 24,
tg_addr, card->dev, 0);
break;
#endif
case __constant_htons(ETH_P_IP):
ip_hdr = (struct iphdr *)skb->data;
ip_eth_mc_map(ip_hdr->daddr, tg_addr);
break;
default:
memcpy(tg_addr, card->dev->broadcast,
card->dev->addr_len);
}
card->stats.multicast++;
skb->pkt_type = PACKET_MULTICAST;
break;
case QETH_CAST_BROADCAST:
memcpy(tg_addr, card->dev->broadcast,
card->dev->addr_len);
card->stats.multicast++;
skb->pkt_type = PACKET_BROADCAST;
break;
case QETH_CAST_UNICAST:
case QETH_CAST_ANYCAST:
case QETH_CAST_NOCAST:
default:
if (card->options.sniffer)
skb->pkt_type = PACKET_OTHERHOST;
else
skb->pkt_type = PACKET_HOST;
memcpy(tg_addr, card->dev->dev_addr,
card->dev->addr_len);
}
if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, &hdr->hdr.l3.dest_addr[2],
card->dev->addr_len);
else
card->dev->header_ops->create(skb, card->dev, prot,
tg_addr, "FAKELL", card->dev->addr_len);
}
skb->protocol = eth_type_trans(skb, card->dev);
if (hdr->hdr.l3.ext_flags &
(QETH_HDR_EXT_VLAN_FRAME | QETH_HDR_EXT_INCLUDE_VLAN_TAG)) {
*vlan_id = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
hdr->hdr.l3.vlan_id : *((u16 *)&hdr->hdr.l3.dest_addr[12]);
is_vlan = 1;
}
if (card->dev->features & NETIF_F_RXCSUM) {
if ((hdr->hdr.l3.ext_flags &
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
(QETH_HDR_EXT_CSUM_HDR_REQ |
QETH_HDR_EXT_CSUM_TRANSP_REQ))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
} else
skb->ip_summed = CHECKSUM_NONE;
return is_vlan;
}
static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
int budget, int *done)
{
int work_done = 0;
struct sk_buff *skb;
struct qeth_hdr *hdr;
__u16 vlan_tag = 0;
int is_vlan;
unsigned int len;
__u16 magic;
*done = 0;
BUG_ON(!budget);
while (budget) {
skb = qeth_core_get_next_skb(card,
&card->qdio.in_q->bufs[card->rx.b_index],
&card->rx.b_element, &card->rx.e_offset, &hdr);
if (!skb) {
*done = 1;
break;
}
skb->dev = card->dev;
switch (hdr->hdr.l3.id) {
case QETH_HEADER_TYPE_LAYER3:
magic = *(__u16 *)skb->data;
if ((card->info.type == QETH_CARD_TYPE_IQD) &&
(magic == ETH_P_AF_IUCV)) {
skb->protocol = ETH_P_AF_IUCV;
skb->pkt_type = PACKET_HOST;
skb->mac_header = NET_SKB_PAD;
skb->dev = card->dev;
len = skb->len;
card->dev->header_ops->create(skb, card->dev, 0,
card->dev->dev_addr, "FAKELL",
card->dev->addr_len);
netif_receive_skb(skb);
} else {
is_vlan = qeth_l3_rebuild_skb(card, skb, hdr,
&vlan_tag);
len = skb->len;
if (is_vlan && !card->options.sniffer)
__vlan_hwaccel_put_tag(skb, vlan_tag);
napi_gro_receive(&card->napi, skb);
}
break;
case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
skb->pkt_type = PACKET_HOST;
skb->protocol = eth_type_trans(skb, skb->dev);
len = skb->len;
netif_receive_skb(skb);
break;
default:
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
continue;
}
work_done++;
budget--;
card->stats.rx_packets++;
card->stats.rx_bytes += len;
}
return work_done;
}
static int qeth_l3_poll(struct napi_struct *napi, int budget)
{
struct qeth_card *card = container_of(napi, struct qeth_card, napi);
int work_done = 0;
struct qeth_qdio_buffer *buffer;
int done;
int new_budget = budget;
if (card->options.performance_stats) {
card->perf_stats.inbound_cnt++;
card->perf_stats.inbound_start_time = qeth_get_micros();
}
while (1) {
if (!card->rx.b_count) {
card->rx.qdio_err = 0;
card->rx.b_count = qdio_get_next_buffers(
card->data.ccwdev, 0, &card->rx.b_index,
&card->rx.qdio_err);
if (card->rx.b_count <= 0) {
card->rx.b_count = 0;
break;
}
card->rx.b_element =
&card->qdio.in_q->bufs[card->rx.b_index]
.buffer->element[0];
card->rx.e_offset = 0;
}
while (card->rx.b_count) {
buffer = &card->qdio.in_q->bufs[card->rx.b_index];
if (!(card->rx.qdio_err &&
qeth_check_qdio_errors(card, buffer->buffer,
card->rx.qdio_err, "qinerr")))
work_done += qeth_l3_process_inbound_buffer(
card, new_budget, &done);
else
done = 1;
if (done) {
if (card->options.performance_stats)
card->perf_stats.bufs_rec++;
qeth_put_buffer_pool_entry(card,
buffer->pool_entry);
qeth_queue_input_buffer(card, card->rx.b_index);
card->rx.b_count--;
if (card->rx.b_count) {
card->rx.b_index =
(card->rx.b_index + 1) %
QDIO_MAX_BUFFERS_PER_Q;
card->rx.b_element =
&card->qdio.in_q
->bufs[card->rx.b_index]
.buffer->element[0];
card->rx.e_offset = 0;
}
}
if (work_done >= budget)
goto out;
else
new_budget = budget - work_done;
}
}
napi_complete(napi);
if (qdio_start_irq(card->data.ccwdev, 0))
napi_schedule(&card->napi);
out:
if (card->options.performance_stats)
card->perf_stats.inbound_time += qeth_get_micros() -
card->perf_stats.inbound_start_time;
return work_done;
}
static int qeth_l3_verify_vlan_dev(struct net_device *dev,
struct qeth_card *card)
{
int rc = 0;
u16 vid;
for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
struct net_device *netdev;
rcu_read_lock();
netdev = __vlan_find_dev_deep(card->dev, vid);
rcu_read_unlock();
if (netdev == dev) {
rc = QETH_VLAN_CARD;
break;
}
}
if (rc && !(vlan_dev_real_dev(dev)->ml_priv == (void *)card))
return 0;
return rc;
}
static int qeth_l3_verify_dev(struct net_device *dev)
{
struct qeth_card *card;
unsigned long flags;
int rc = 0;
read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
list_for_each_entry(card, &qeth_core_card_list.list, list) {
if (card->dev == dev) {
rc = QETH_REAL_CARD;
break;
}
rc = qeth_l3_verify_vlan_dev(dev, card);
if (rc)
break;
}
read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
return rc;
}
static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
{
struct qeth_card *card = NULL;
int rc;
rc = qeth_l3_verify_dev(dev);
if (rc == QETH_REAL_CARD)
card = dev->ml_priv;
else if (rc == QETH_VLAN_CARD)
card = vlan_dev_real_dev(dev)->ml_priv;
if (card && card->options.layer2)
card = NULL;
if (card)
QETH_CARD_TEXT_(card, 4, "%d", rc);
return card ;
}
static int qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
{
int rc = 0;
QETH_DBF_TEXT(SETUP, 2, "stopcard");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
qeth_set_allowed_threads(card, 0, 1);
if (card->options.sniffer &&
(card->info.promisc_mode == SET_PROMISC_MODE_ON))
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
if (card->read.state == CH_STATE_UP &&
card->write.state == CH_STATE_UP &&
(card->state == CARD_STATE_UP)) {
if (recovery_mode)
qeth_l3_stop(card->dev);
else {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
card->state = CARD_STATE_SOFTSETUP;
}
if (card->state == CARD_STATE_SOFTSETUP) {
qeth_l3_clear_ip_list(card, 1);
qeth_clear_ipacmd_list(card);
card->state = CARD_STATE_HARDSETUP;
}
if (card->state == CARD_STATE_HARDSETUP) {
qeth_qdio_clear_card(card, 0);
qeth_clear_qdio_buffers(card);
qeth_clear_working_pool_list(card);
card->state = CARD_STATE_DOWN;
}
if (card->state == CARD_STATE_DOWN) {
qeth_clear_cmd_buffers(&card->read);
qeth_clear_cmd_buffers(&card->write);
}
return rc;
}
/*
* test for and Switch promiscuous mode (on or off)
* either for guestlan or HiperSocket Sniffer
*/
static void
qeth_l3_handle_promisc_mode(struct qeth_card *card)
{
struct net_device *dev = card->dev;
if (((dev->flags & IFF_PROMISC) &&
(card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
(!(dev->flags & IFF_PROMISC) &&
(card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
return;
if (card->info.guestlan) { /* Guestlan trace */
if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
qeth_setadp_promisc_mode(card);
} else if (card->options.sniffer && /* HiperSockets trace */
qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
if (dev->flags & IFF_PROMISC) {
QETH_CARD_TEXT(card, 3, "+promisc");
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
} else {
QETH_CARD_TEXT(card, 3, "-promisc");
qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
}
}
}
static void qeth_l3_set_multicast_list(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 3, "setmulti");
if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
(card->state != CARD_STATE_UP))
return;
if (!card->options.sniffer) {
qeth_l3_delete_mc_addresses(card);
qeth_l3_add_multicast_ipv4(card);
#ifdef CONFIG_QETH_IPV6
qeth_l3_add_multicast_ipv6(card);
#endif
qeth_l3_set_ip_addr_list(card);
if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
return;
}
qeth_l3_handle_promisc_mode(card);
}
static const char *qeth_l3_arp_get_error_cause(int *rc)
{
switch (*rc) {
case QETH_IPA_ARP_RC_FAILED:
*rc = -EIO;
return "operation failed";
case QETH_IPA_ARP_RC_NOTSUPP:
*rc = -EOPNOTSUPP;
return "operation not supported";
case QETH_IPA_ARP_RC_OUT_OF_RANGE:
*rc = -EINVAL;
return "argument out of range";
case QETH_IPA_ARP_RC_Q_NOTSUPP:
*rc = -EOPNOTSUPP;
return "query operation not supported";
case QETH_IPA_ARP_RC_Q_NO_DATA:
*rc = -ENOENT;
return "no query data available";
default:
return "unknown error";
}
}
static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
{
int tmp;
int rc;
QETH_CARD_TEXT(card, 3, "arpstnoe");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
* thus we say EOPNOTSUPP for this ARP function
*/
if (card->info.guestlan)
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
no_entries);
if (rc) {
tmp = rc;
QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on "
"%s: %s (0x%x/%d)\n", QETH_CARD_IFNAME(card),
qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
}
return rc;
}
static __u32 get_arp_entry_size(struct qeth_card *card,
struct qeth_arp_query_data *qdata,
struct qeth_arp_entrytype *type, __u8 strip_entries)
{
__u32 rc;
__u8 is_hsi;
is_hsi = qdata->reply_bits == 5;
if (type->ip == QETHARP_IP_ADDR_V4) {
QETH_CARD_TEXT(card, 4, "arpev4");
if (strip_entries) {
rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
sizeof(struct qeth_arp_qi_entry7_short);
} else {
rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
sizeof(struct qeth_arp_qi_entry7);
}
} else if (type->ip == QETHARP_IP_ADDR_V6) {
QETH_CARD_TEXT(card, 4, "arpev6");
if (strip_entries) {
rc = is_hsi ?
sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
sizeof(struct qeth_arp_qi_entry7_short_ipv6);
} else {
rc = is_hsi ?
sizeof(struct qeth_arp_qi_entry5_ipv6) :
sizeof(struct qeth_arp_qi_entry7_ipv6);
}
} else {
QETH_CARD_TEXT(card, 4, "arpinv");
rc = 0;
}
return rc;
}
static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
{
return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
(type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
}
static int qeth_l3_arp_query_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
struct qeth_arp_query_data *qdata;
struct qeth_arp_query_info *qinfo;
int i;
int e;
int entrybytes_done;
int stripped_bytes;
__u8 do_strip_entries;
QETH_CARD_TEXT(card, 3, "arpquecb");
qinfo = (struct qeth_arp_query_info *) reply->param;
cmd = (struct qeth_ipa_cmd *) data;
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
if (cmd->hdr.return_code) {
QETH_CARD_TEXT(card, 4, "arpcberr");
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
return 0;
}
if (cmd->data.setassparms.hdr.return_code) {
cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
QETH_CARD_TEXT(card, 4, "setaperr");
QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
return 0;
}
qdata = &cmd->data.setassparms.data.query_arp;
QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
entrybytes_done = 0;
for (e = 0; e < qdata->no_entries; ++e) {
char *cur_entry;
__u32 esize;
struct qeth_arp_entrytype *etype;
cur_entry = &qdata->data + entrybytes_done;
etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
QETH_CARD_TEXT(card, 4, "pmis");
QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
break;
}
esize = get_arp_entry_size(card, qdata, etype,
do_strip_entries);
QETH_CARD_TEXT_(card, 5, "esz%i", esize);
if (!esize)
break;
if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOMEM);
cmd->hdr.return_code = IPA_RC_ENOMEM;
goto out_error;
}
memcpy(qinfo->udata + qinfo->udata_offset,
&qdata->data + entrybytes_done + stripped_bytes,
esize);
entrybytes_done += esize + stripped_bytes;
qinfo->udata_offset += esize;
++qinfo->no_entries;
}
/* check if all replies received ... */
if (cmd->data.setassparms.hdr.seq_no <
cmd->data.setassparms.hdr.number_of_replies)
return 1;
QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
memcpy(qinfo->udata, &qinfo->no_entries, 4);
/* keep STRIP_ENTRIES flag so the user program can distinguish
* stripped entries from normal ones */
if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
QETH_CARD_TEXT_(card, 4, "rc%i", 0);
return 0;
out_error:
i = 0;
memcpy(qinfo->udata, &i, 4);
return 0;
}
static int qeth_l3_send_ipa_arp_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob, int len,
int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
unsigned long),
void *reply_param)
{
QETH_CARD_TEXT(card, 4, "sendarp");
memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
&card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
reply_cb, reply_param);
}
static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
enum qeth_prot_versions prot,
struct qeth_arp_query_info *qinfo)
{
struct qeth_cmd_buffer *iob;
struct qeth_ipa_cmd *cmd;
int tmp;
int rc;
QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_QUERY_INFO,
sizeof(struct qeth_arp_query_data) - sizeof(char),
prot);
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
cmd->data.setassparms.data.query_arp.reply_bits = 0;
cmd->data.setassparms.data.query_arp.no_entries = 0;
rc = qeth_l3_send_ipa_arp_cmd(card, iob,
QETH_SETASS_BASE_LEN+QETH_ARP_CMD_LEN,
qeth_l3_arp_query_cb, (void *)qinfo);
if (rc) {
tmp = rc;
QETH_DBF_MESSAGE(2,
"Error while querying ARP cache on %s: %s "
"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
}
return rc;
}
static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
{
struct qeth_arp_query_info qinfo = {0, };
int rc;
QETH_CARD_TEXT(card, 3, "arpquery");
if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
IPA_ARP_PROCESSING)) {
QETH_CARD_TEXT(card, 3, "arpqnsup");
rc = -EOPNOTSUPP;
goto out;
}
/* get size of userspace buffer and mask_bits -> 6 bytes */
if (copy_from_user(&qinfo, udata, 6)) {
rc = -EFAULT;
goto out;
}
qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
if (!qinfo.udata) {
rc = -ENOMEM;
goto out;
}
qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
if (rc) {
if (copy_to_user(udata, qinfo.udata, 4))
rc = -EFAULT;
goto free_and_out;
} else {
#ifdef CONFIG_QETH_IPV6
if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
/* fails in case of GuestLAN QDIO mode */
qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6,
&qinfo);
}
#endif
if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
QETH_CARD_TEXT(card, 4, "qactf");
rc = -EFAULT;
goto free_and_out;
}
QETH_CARD_TEXT_(card, 4, "qacts");
}
free_and_out:
kfree(qinfo.udata);
out:
return rc;
}
static int qeth_l3_arp_add_entry(struct qeth_card *card,
struct qeth_arp_cache_entry *entry)
{
struct qeth_cmd_buffer *iob;
char buf[16];
int tmp;
int rc;
QETH_CARD_TEXT(card, 3, "arpadent");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
* thus we say EOPNOTSUPP for this ARP function
*/
if (card->info.guestlan)
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_ADD_ENTRY,
sizeof(struct qeth_arp_cache_entry),
QETH_PROT_IPV4);
rc = qeth_l3_send_setassparms(card, iob,
sizeof(struct qeth_arp_cache_entry),
(unsigned long) entry,
qeth_l3_default_setassparms_cb, NULL);
if (rc) {
tmp = rc;
qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
QETH_DBF_MESSAGE(2, "Could not add ARP entry for address %s "
"on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
}
return rc;
}
static int qeth_l3_arp_remove_entry(struct qeth_card *card,
struct qeth_arp_cache_entry *entry)
{
struct qeth_cmd_buffer *iob;
char buf[16] = {0, };
int tmp;
int rc;
QETH_CARD_TEXT(card, 3, "arprment");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_REMOVE_ENTRY;
* thus we say EOPNOTSUPP for this ARP function
*/
if (card->info.guestlan)
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
memcpy(buf, entry, 12);
iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_REMOVE_ENTRY,
12,
QETH_PROT_IPV4);
rc = qeth_l3_send_setassparms(card, iob,
12, (unsigned long)buf,
qeth_l3_default_setassparms_cb, NULL);
if (rc) {
tmp = rc;
memset(buf, 0, 16);
qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
QETH_DBF_MESSAGE(2, "Could not delete ARP entry for address %s"
" on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
}
return rc;
}
static int qeth_l3_arp_flush_cache(struct qeth_card *card)
{
int rc;
int tmp;
QETH_CARD_TEXT(card, 3, "arpflush");
/*
* currently GuestLAN only supports the ARP assist function
* IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
* thus we say EOPNOTSUPP for this ARP function
*/
if (card->info.guestlan || (card->info.type == QETH_CARD_TYPE_IQD))
return -EOPNOTSUPP;
if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
return -EOPNOTSUPP;
}
rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
IPA_CMD_ASS_ARP_FLUSH_CACHE, 0);
if (rc) {
tmp = rc;
QETH_DBF_MESSAGE(2, "Could not flush ARP cache on %s: %s "
"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
}
return rc;
}
static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct qeth_card *card = dev->ml_priv;
struct qeth_arp_cache_entry arp_entry;
struct mii_ioctl_data *mii_data;
int rc = 0;
if (!card)
return -ENODEV;
if ((card->state != CARD_STATE_UP) &&
(card->state != CARD_STATE_SOFTSETUP))
return -ENODEV;
switch (cmd) {
case SIOC_QETH_ARP_SET_NO_ENTRIES:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
break;
case SIOC_QETH_ARP_QUERY_INFO:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
break;
case SIOC_QETH_ARP_ADD_ENTRY:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
sizeof(struct qeth_arp_cache_entry)))
rc = -EFAULT;
else
rc = qeth_l3_arp_add_entry(card, &arp_entry);
break;
case SIOC_QETH_ARP_REMOVE_ENTRY:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
sizeof(struct qeth_arp_cache_entry)))
rc = -EFAULT;
else
rc = qeth_l3_arp_remove_entry(card, &arp_entry);
break;
case SIOC_QETH_ARP_FLUSH_CACHE:
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
rc = qeth_l3_arp_flush_cache(card);
break;
case SIOC_QETH_ADP_SET_SNMP_CONTROL:
rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
break;
case SIOC_QETH_GET_CARD_TYPE:
if ((card->info.type == QETH_CARD_TYPE_OSD ||
card->info.type == QETH_CARD_TYPE_OSX) &&
!card->info.guestlan)
return 1;
return 0;
break;
case SIOCGMIIPHY:
mii_data = if_mii(rq);
mii_data->phy_id = 0;
break;
case SIOCGMIIREG:
mii_data = if_mii(rq);
if (mii_data->phy_id != 0)
rc = -EINVAL;
else
mii_data->val_out = qeth_mdio_read(dev,
mii_data->phy_id,
mii_data->reg_num);
break;
case SIOC_QETH_QUERY_OAT:
rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
break;
default:
rc = -EOPNOTSUPP;
}
if (rc)
QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
return rc;
}
int inline qeth_l3_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
{
int cast_type = RTN_UNSPEC;
struct neighbour *n = NULL;
struct dst_entry *dst;
rcu_read_lock();
dst = skb_dst(skb);
if (dst)
n = dst_neigh_lookup_skb(dst, skb);
if (n) {
cast_type = n->type;
rcu_read_unlock();
neigh_release(n);
if ((cast_type == RTN_BROADCAST) ||
(cast_type == RTN_MULTICAST) ||
(cast_type == RTN_ANYCAST))
return cast_type;
else
return RTN_UNSPEC;
}
rcu_read_unlock();
/* try something else */
if (skb->protocol == ETH_P_IPV6)
return (skb_network_header(skb)[24] == 0xff) ?
RTN_MULTICAST : 0;
else if (skb->protocol == ETH_P_IP)
return ((skb_network_header(skb)[16] & 0xf0) == 0xe0) ?
RTN_MULTICAST : 0;
/* ... */
if (!memcmp(skb->data, skb->dev->broadcast, 6))
return RTN_BROADCAST;
else {
u16 hdr_mac;
hdr_mac = *((u16 *)skb->data);
/* tr multicast? */
switch (card->info.link_type) {
case QETH_LINK_TYPE_HSTR:
case QETH_LINK_TYPE_LANE_TR:
if ((hdr_mac == QETH_TR_MAC_NC) ||
(hdr_mac == QETH_TR_MAC_C))
return RTN_MULTICAST;
break;
/* eth or so multicast? */
default:
if ((hdr_mac == QETH_ETH_MAC_V4) ||
(hdr_mac == QETH_ETH_MAC_V6))
return RTN_MULTICAST;
}
}
return cast_type;
}
static void qeth_l3_fill_af_iucv_hdr(struct qeth_card *card,
struct qeth_hdr *hdr, struct sk_buff *skb)
{
char daddr[16];
struct af_iucv_trans_hdr *iucv_hdr;
skb_pull(skb, 14);
card->dev->header_ops->create(skb, card->dev, 0,
card->dev->dev_addr, card->dev->dev_addr,
card->dev->addr_len);
skb_pull(skb, 14);
iucv_hdr = (struct af_iucv_trans_hdr *)skb->data;
memset(hdr, 0, sizeof(struct qeth_hdr));
hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
hdr->hdr.l3.ext_flags = 0;
hdr->hdr.l3.length = skb->len;
hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
memset(daddr, 0, sizeof(daddr));
daddr[0] = 0xfe;
daddr[1] = 0x80;
memcpy(&daddr[8], iucv_hdr->destUserID, 8);
memcpy(hdr->hdr.l3.dest_addr, daddr, 16);
}
static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
struct sk_buff *skb, int ipv, int cast_type)
{
struct dst_entry *dst;
memset(hdr, 0, sizeof(struct qeth_hdr));
hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
hdr->hdr.l3.ext_flags = 0;
/*
* before we're going to overwrite this location with next hop ip.
* v6 uses passthrough, v4 sets the tag in the QDIO header.
*/
if (vlan_tx_tag_present(skb)) {
if ((ipv == 4) || (card->info.type == QETH_CARD_TYPE_IQD))
hdr->hdr.l3.ext_flags = QETH_HDR_EXT_VLAN_FRAME;
else
hdr->hdr.l3.ext_flags = QETH_HDR_EXT_INCLUDE_VLAN_TAG;
hdr->hdr.l3.vlan_id = vlan_tx_tag_get(skb);
}
hdr->hdr.l3.length = skb->len - sizeof(struct qeth_hdr);
rcu_read_lock();
dst = skb_dst(skb);
if (ipv == 4) {
struct rtable *rt = (struct rtable *) dst;
__be32 *pkey = &ip_hdr(skb)->daddr;
if (rt->rt_gateway)
pkey = &rt->rt_gateway;
/* IPv4 */
hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags4(cast_type);
memset(hdr->hdr.l3.dest_addr, 0, 12);
*((__be32 *) (&hdr->hdr.l3.dest_addr[12])) = *pkey;
} else if (ipv == 6) {
struct rt6_info *rt = (struct rt6_info *) dst;
struct in6_addr *pkey = &ipv6_hdr(skb)->daddr;
if (!ipv6_addr_any(&rt->rt6i_gateway))
pkey = &rt->rt6i_gateway;
/* IPv6 */
hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags6(cast_type);
if (card->info.type == QETH_CARD_TYPE_IQD)
hdr->hdr.l3.flags &= ~QETH_HDR_PASSTHRU;
memcpy(hdr->hdr.l3.dest_addr, pkey, 16);
} else {
if (!memcmp(skb->data + sizeof(struct qeth_hdr),
skb->dev->broadcast, 6)) {
/* broadcast? */
hdr->hdr.l3.flags = QETH_CAST_BROADCAST |
QETH_HDR_PASSTHRU;
} else {
hdr->hdr.l3.flags = (cast_type == RTN_MULTICAST) ?
QETH_CAST_MULTICAST | QETH_HDR_PASSTHRU :
QETH_CAST_UNICAST | QETH_HDR_PASSTHRU;
}
}
rcu_read_unlock();
}
static inline void qeth_l3_hdr_csum(struct qeth_card *card,
struct qeth_hdr *hdr, struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
/* tcph->check contains already the pseudo hdr checksum
* so just set the header flags
*/
if (iph->protocol == IPPROTO_UDP)
hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_UDP;
hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
QETH_HDR_EXT_CSUM_HDR_REQ;
iph->check = 0;
if (card->options.performance_stats)
card->perf_stats.tx_csum++;
}
static void qeth_tso_fill_header(struct qeth_card *card,
struct qeth_hdr *qhdr, struct sk_buff *skb)
{
struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr;
struct tcphdr *tcph = tcp_hdr(skb);
struct iphdr *iph = ip_hdr(skb);
struct ipv6hdr *ip6h = ipv6_hdr(skb);
/*fix header to TSO values ...*/
hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
hdr->hdr.hdr.l3.length = skb->len - sizeof(struct qeth_hdr_tso);
/*set values which are fix for the first approach ...*/
hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
hdr->ext.imb_hdr_no = 1;
hdr->ext.hdr_type = 1;
hdr->ext.hdr_version = 1;
hdr->ext.hdr_len = 28;
/*insert non-fix values */
hdr->ext.mss = skb_shinfo(skb)->gso_size;
hdr->ext.dg_hdr_len = (__u16)(iph->ihl*4 + tcph->doff*4);
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) {
ip6h->payload_len = 0;
tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
0, IPPROTO_TCP, 0);
} else {
/*OSA want us to set these values ...*/
tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
0, IPPROTO_TCP, 0);
iph->tot_len = 0;
iph->check = 0;
}
}
static inline int qeth_l3_tso_elements(struct sk_buff *skb)
{
unsigned long tcpd = (unsigned long)tcp_hdr(skb) +
tcp_hdr(skb)->doff * 4;
int tcpd_len = skb->len - (tcpd - (unsigned long)skb->data);
int elements = PFN_UP(tcpd + tcpd_len - 1) - PFN_DOWN(tcpd);
elements += skb_shinfo(skb)->nr_frags;
return elements;
}
static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
int rc;
u16 *tag;
struct qeth_hdr *hdr = NULL;
int elements_needed = 0;
int elems;
struct qeth_card *card = dev->ml_priv;
struct sk_buff *new_skb = NULL;
int ipv = qeth_get_ip_version(skb);
int cast_type = qeth_l3_get_cast_type(card, skb);
struct qeth_qdio_out_q *queue = card->qdio.out_qs
[qeth_get_priority_queue(card, skb, ipv, cast_type)];
int tx_bytes = skb->len;
bool large_send;
int data_offset = -1;
int nr_frags;
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)))) ||
card->options.sniffer)
goto tx_drop;
if ((card->state != CARD_STATE_UP) || !card->lan_online) {
card->stats.tx_carrier_errors++;
goto tx_drop;
}
if ((cast_type == RTN_BROADCAST) &&
(card->info.broadcast_capable == 0))
goto tx_drop;
if (card->options.performance_stats) {
card->perf_stats.outbound_cnt++;
card->perf_stats.outbound_start_time = qeth_get_micros();
}
large_send = skb_is_gso(skb);
if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
(skb_shinfo(skb)->nr_frags == 0)) {
new_skb = skb;
if (new_skb->protocol == ETH_P_AF_IUCV)
data_offset = 0;
else
data_offset = ETH_HLEN;
hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
if (!hdr)
goto tx_drop;
elements_needed++;
} else {
/* create a clone with writeable headroom */
new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr_tso)
+ VLAN_HLEN);
if (!new_skb)
goto tx_drop;
}
if (card->info.type == QETH_CARD_TYPE_IQD) {
if (data_offset < 0)
skb_pull(new_skb, ETH_HLEN);
} else {
if (ipv == 4) {
skb_pull(new_skb, ETH_HLEN);
}
if (ipv != 4 && vlan_tx_tag_present(new_skb)) {
skb_push(new_skb, VLAN_HLEN);
skb_copy_to_linear_data(new_skb, new_skb->data + 4, 4);
skb_copy_to_linear_data_offset(new_skb, 4,
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(vlan_tx_tag_get(new_skb));
}
}
netif_stop_queue(dev);
/* fix hardware limitation: as long as we do not have sbal
* chaining we can not send long frag lists
*/
if (large_send) {
if (qeth_l3_tso_elements(new_skb) + 1 > 16) {
if (skb_linearize(new_skb))
goto tx_drop;
if (card->options.performance_stats)
card->perf_stats.tx_lin++;
}
}
if (large_send && (cast_type == RTN_UNSPEC)) {
hdr = (struct qeth_hdr *)skb_push(new_skb,
sizeof(struct qeth_hdr_tso));
memset(hdr, 0, sizeof(struct qeth_hdr_tso));
qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type);
qeth_tso_fill_header(card, hdr, new_skb);
elements_needed++;
} else {
if (data_offset < 0) {
hdr = (struct qeth_hdr *)skb_push(new_skb,
sizeof(struct qeth_hdr));
qeth_l3_fill_header(card, hdr, new_skb, ipv,
cast_type);
} else {
if (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,
cast_type);
hdr->hdr.l3.length = new_skb->len - data_offset;
}
}
if (skb->ip_summed == CHECKSUM_PARTIAL)
qeth_l3_hdr_csum(card, hdr, new_skb);
}
elems = qeth_get_elements_no(card, (void *)hdr, new_skb,
elements_needed);
if (!elems) {
if (data_offset >= 0)
kmem_cache_free(qeth_core_header_cache, hdr);
goto tx_drop;
}
elements_needed += elems;
nr_frags = skb_shinfo(new_skb)->nr_frags;
if (card->info.type != QETH_CARD_TYPE_IQD) {
int len;
if (large_send)
len = ((unsigned long)tcp_hdr(new_skb) +
tcp_hdr(new_skb)->doff * 4) -
(unsigned long)new_skb->data;
else
len = sizeof(struct qeth_hdr_layer3);
if (qeth_hdr_chk_and_bounce(new_skb, len))
goto tx_drop;
rc = qeth_do_send_packet(card, queue, new_skb, hdr,
elements_needed);
} else
rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
elements_needed, data_offset, 0);
if (!rc) {
card->stats.tx_packets++;
card->stats.tx_bytes += tx_bytes;
if (new_skb != skb)
dev_kfree_skb_any(skb);
if (card->options.performance_stats) {
if (large_send) {
card->perf_stats.large_send_bytes += tx_bytes;
card->perf_stats.large_send_cnt++;
}
if (nr_frags) {
card->perf_stats.sg_skbs_sent++;
/* nr_frags + skb->data */
card->perf_stats.sg_frags_sent += nr_frags + 1;
}
}
rc = NETDEV_TX_OK;
} else {
if (data_offset >= 0)
kmem_cache_free(qeth_core_header_cache, hdr);
if (rc == -EBUSY) {
if (new_skb != skb)
dev_kfree_skb_any(new_skb);
return NETDEV_TX_BUSY;
} else
goto tx_drop;
}
netif_wake_queue(dev);
if (card->options.performance_stats)
card->perf_stats.outbound_time += qeth_get_micros() -
card->perf_stats.outbound_start_time;
return rc;
tx_drop:
card->stats.tx_dropped++;
card->stats.tx_errors++;
if ((new_skb != skb) && new_skb)
dev_kfree_skb_any(new_skb);
dev_kfree_skb_any(skb);
netif_wake_queue(dev);
return NETDEV_TX_OK;
}
static int __qeth_l3_open(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
int rc = 0;
QETH_CARD_TEXT(card, 4, "qethopen");
if (card->state == CARD_STATE_UP)
return rc;
if (card->state != CARD_STATE_SOFTSETUP)
return -ENODEV;
card->data.state = CH_STATE_UP;
card->state = CARD_STATE_UP;
netif_start_queue(dev);
if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
napi_enable(&card->napi);
napi_schedule(&card->napi);
} else
rc = -EIO;
return rc;
}
static int qeth_l3_open(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 5, "qethope_");
if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
QETH_CARD_TEXT(card, 3, "openREC");
return -ERESTARTSYS;
}
return __qeth_l3_open(dev);
}
static int qeth_l3_stop(struct net_device *dev)
{
struct qeth_card *card = dev->ml_priv;
QETH_CARD_TEXT(card, 4, "qethstop");
netif_tx_disable(dev);
if (card->state == CARD_STATE_UP) {
card->state = CARD_STATE_SOFTSETUP;
napi_disable(&card->napi);
}
return 0;
}
static netdev_features_t qeth_l3_fix_features(struct net_device *dev,
netdev_features_t features)
{
struct qeth_card *card = dev->ml_priv;
if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
features &= ~NETIF_F_IP_CSUM;
if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
features &= ~NETIF_F_TSO;
if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
features &= ~NETIF_F_RXCSUM;
return features;
}
static int qeth_l3_set_features(struct net_device *dev,
netdev_features_t features)
{
struct qeth_card *card = dev->ml_priv;
u32 changed = dev->features ^ features;
int err;
if (!(changed & NETIF_F_RXCSUM))
return 0;
if (card->state == CARD_STATE_DOWN ||
card->state == CARD_STATE_RECOVER)
return 0;
err = qeth_l3_set_rx_csum(card, features & NETIF_F_RXCSUM);
if (err)
dev->features = features ^ NETIF_F_RXCSUM;
return err;
}
static const struct ethtool_ops qeth_l3_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_strings = qeth_core_get_strings,
.get_ethtool_stats = qeth_core_get_ethtool_stats,
.get_sset_count = qeth_core_get_sset_count,
.get_drvinfo = qeth_core_get_drvinfo,
.get_settings = qeth_core_ethtool_get_settings,
};
/*
* we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
* NOARP on the netdevice is no option because it also turns off neighbor
* solicitation. For IPv4 we install a neighbor_setup function. We don't want
* arp resolution but we want the hard header (packet socket will work
* e.g. tcpdump)
*/
static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
{
n->nud_state = NUD_NOARP;
memcpy(n->ha, "FAKELL", 6);
n->output = n->ops->connected_output;
return 0;
}
static int
qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
{
if (np->tbl->family == AF_INET)
np->neigh_setup = qeth_l3_neigh_setup_noarp;
return 0;
}
static const struct net_device_ops qeth_l3_netdev_ops = {
.ndo_open = qeth_l3_open,
.ndo_stop = qeth_l3_stop,
.ndo_get_stats = qeth_get_stats,
.ndo_start_xmit = qeth_l3_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = qeth_l3_set_multicast_list,
.ndo_do_ioctl = qeth_l3_do_ioctl,
.ndo_change_mtu = qeth_change_mtu,
.ndo_fix_features = qeth_l3_fix_features,
.ndo_set_features = qeth_l3_set_features,
.ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
};
static const struct net_device_ops qeth_l3_osa_netdev_ops = {
.ndo_open = qeth_l3_open,
.ndo_stop = qeth_l3_stop,
.ndo_get_stats = qeth_get_stats,
.ndo_start_xmit = qeth_l3_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = qeth_l3_set_multicast_list,
.ndo_do_ioctl = qeth_l3_do_ioctl,
.ndo_change_mtu = qeth_change_mtu,
.ndo_fix_features = qeth_l3_fix_features,
.ndo_set_features = qeth_l3_set_features,
.ndo_vlan_rx_add_vid = qeth_l3_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = qeth_l3_vlan_rx_kill_vid,
.ndo_tx_timeout = qeth_tx_timeout,
.ndo_neigh_setup = qeth_l3_neigh_setup,
};
static int qeth_l3_setup_netdev(struct qeth_card *card)
{
if (card->info.type == QETH_CARD_TYPE_OSD ||
card->info.type == QETH_CARD_TYPE_OSX) {
if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
(card->info.link_type == QETH_LINK_TYPE_HSTR)) {
pr_info("qeth_l3: ignoring TR device\n");
return -ENODEV;
} else {
card->dev = alloc_etherdev(0);
if (!card->dev)
return -ENODEV;
card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
/*IPv6 address autoconfiguration stuff*/
qeth_l3_get_unique_id(card);
if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
card->dev->dev_id = card->info.unique_id &
0xffff;
if (!card->info.guestlan) {
card->dev->hw_features = NETIF_F_SG |
NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
NETIF_F_TSO;
card->dev->features = NETIF_F_RXCSUM;
}
}
} else if (card->info.type == QETH_CARD_TYPE_IQD) {
card->dev = alloc_netdev(0, "hsi%d", ether_setup);
if (!card->dev)
return -ENODEV;
card->dev->flags |= IFF_NOARP;
card->dev->netdev_ops = &qeth_l3_netdev_ops;
qeth_l3_iqd_read_initial_mac(card);
if (card->options.hsuid[0])
memcpy(card->dev->perm_addr, card->options.hsuid, 9);
} else
return -ENODEV;
card->dev->ml_priv = card;
card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
card->dev->mtu = card->info.initial_mtu;
SET_ETHTOOL_OPS(card->dev, &qeth_l3_ethtool_ops);
card->dev->features |= NETIF_F_HW_VLAN_TX |
NETIF_F_HW_VLAN_RX |
NETIF_F_HW_VLAN_FILTER;
card->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
card->dev->gso_max_size = 15 * PAGE_SIZE;
SET_NETDEV_DEV(card->dev, &card->gdev->dev);
netif_napi_add(card->dev, &card->napi, qeth_l3_poll, QETH_NAPI_WEIGHT);
return register_netdev(card->dev);
}
static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
qeth_l3_create_device_attributes(&gdev->dev);
card->options.layer2 = 0;
card->info.hwtrap = 0;
return 0;
}
static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
{
struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
qeth_l3_remove_device_attributes(&cgdev->dev);
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
if (cgdev->state == CCWGROUP_ONLINE)
qeth_l3_set_offline(cgdev);
if (card->dev) {
unregister_netdev(card->dev);
card->dev = NULL;
}
qeth_l3_clear_ip_list(card, 0);
qeth_l3_clear_ipato_list(card);
return;
}
static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
int rc = 0;
enum qeth_card_states recover_flag;
BUG_ON(!card);
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 2, "setonlin");
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
recover_flag = card->state;
rc = qeth_core_hardsetup_card(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
rc = -ENODEV;
goto out_remove;
}
if (!card->dev && qeth_l3_setup_netdev(card)) {
rc = -ENODEV;
goto out_remove;
}
if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
if (card->info.hwtrap &&
qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
card->info.hwtrap = 0;
} else
card->info.hwtrap = 0;
card->state = CARD_STATE_HARDSETUP;
memset(&card->rx, 0, sizeof(struct qeth_rx));
qeth_print_status_message(card);
/* softsetup */
QETH_DBF_TEXT(SETUP, 2, "softsetp");
rc = qeth_send_startlan(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
if (rc == 0xe080) {
dev_warn(&card->gdev->dev,
"The LAN is offline\n");
card->lan_online = 0;
goto contin;
}
rc = -ENODEV;
goto out_remove;
} else
card->lan_online = 1;
contin:
rc = qeth_l3_setadapter_parms(card);
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
if (!card->options.sniffer) {
rc = qeth_l3_start_ipassists(card);
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
rc = qeth_l3_setrouting_v4(card);
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
rc = qeth_l3_setrouting_v6(card);
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
}
netif_tx_disable(card->dev);
rc = qeth_init_qdio_queues(card);
if (rc) {
QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
rc = -ENODEV;
goto out_remove;
}
card->state = CARD_STATE_SOFTSETUP;
qeth_set_allowed_threads(card, 0xffffffff, 0);
qeth_l3_set_ip_addr_list(card);
if (card->lan_online)
netif_carrier_on(card->dev);
else
netif_carrier_off(card->dev);
if (recover_flag == CARD_STATE_RECOVER) {
rtnl_lock();
if (recovery_mode)
__qeth_l3_open(card->dev);
else
dev_open(card->dev);
qeth_l3_set_multicast_list(card->dev);
rtnl_unlock();
}
/* let user_space know that device is online */
kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return 0;
out_remove:
qeth_l3_stop_card(card, 0);
ccw_device_set_offline(CARD_DDEV(card));
ccw_device_set_offline(CARD_WDEV(card));
ccw_device_set_offline(CARD_RDEV(card));
if (recover_flag == CARD_STATE_RECOVER)
card->state = CARD_STATE_RECOVER;
else
card->state = CARD_STATE_DOWN;
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return rc;
}
static int qeth_l3_set_online(struct ccwgroup_device *gdev)
{
return __qeth_l3_set_online(gdev, 0);
}
static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
int recovery_mode)
{
struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
int rc = 0, rc2 = 0, rc3 = 0;
enum qeth_card_states recover_flag;
mutex_lock(&card->discipline_mutex);
mutex_lock(&card->conf_mutex);
QETH_DBF_TEXT(SETUP, 3, "setoffl");
QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
if (card->dev && netif_carrier_ok(card->dev))
netif_carrier_off(card->dev);
recover_flag = card->state;
if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
card->info.hwtrap = 1;
}
qeth_l3_stop_card(card, recovery_mode);
if ((card->options.cq == QETH_CQ_ENABLED) && card->dev) {
rtnl_lock();
call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
rtnl_unlock();
}
rc = ccw_device_set_offline(CARD_DDEV(card));
rc2 = ccw_device_set_offline(CARD_WDEV(card));
rc3 = ccw_device_set_offline(CARD_RDEV(card));
if (!rc)
rc = (rc2) ? rc2 : rc3;
if (rc)
QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
if (recover_flag == CARD_STATE_UP)
card->state = CARD_STATE_RECOVER;
/* let user_space know that device is offline */
kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
mutex_unlock(&card->conf_mutex);
mutex_unlock(&card->discipline_mutex);
return 0;
}
static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
{
return __qeth_l3_set_offline(cgdev, 0);
}
static int qeth_l3_recover(void *ptr)
{
struct qeth_card *card;
int rc = 0;
card = (struct qeth_card *) ptr;
QETH_CARD_TEXT(card, 2, "recover1");
QETH_CARD_HEX(card, 2, &card, sizeof(void *));
if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
return 0;
QETH_CARD_TEXT(card, 2, "recover2");
dev_warn(&card->gdev->dev,
"A recovery process has been started for the device\n");
__qeth_l3_set_offline(card->gdev, 1);
rc = __qeth_l3_set_online(card->gdev, 1);
if (!rc)
dev_info(&card->gdev->dev,
"Device successfully recovered!\n");
else {
if (rtnl_trylock()) {
dev_close(card->dev);
rtnl_unlock();
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
}
}
qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
return 0;
}
static void qeth_l3_shutdown(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
qeth_set_allowed_threads(card, 0, 1);
if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
qeth_qdio_clear_card(card, 0);
qeth_clear_qdio_buffers(card);
}
static int qeth_l3_pm_suspend(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
if (card->dev)
netif_device_detach(card->dev);
qeth_set_allowed_threads(card, 0, 1);
wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
if (gdev->state == CCWGROUP_OFFLINE)
return 0;
if (card->state == CARD_STATE_UP) {
if (card->info.hwtrap)
qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
__qeth_l3_set_offline(card->gdev, 1);
} else
__qeth_l3_set_offline(card->gdev, 0);
return 0;
}
static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
{
struct qeth_card *card = dev_get_drvdata(&gdev->dev);
int rc = 0;
if (gdev->state == CCWGROUP_OFFLINE)
goto out;
if (card->state == CARD_STATE_RECOVER) {
rc = __qeth_l3_set_online(card->gdev, 1);
if (rc) {
rtnl_lock();
dev_close(card->dev);
rtnl_unlock();
}
} else
rc = __qeth_l3_set_online(card->gdev, 0);
out:
qeth_set_allowed_threads(card, 0xffffffff, 0);
if (card->dev)
netif_device_attach(card->dev);
if (rc)
dev_warn(&card->gdev->dev, "The qeth device driver "
"failed to recover an error on the device\n");
return rc;
}
struct qeth_discipline qeth_l3_discipline = {
.start_poll = qeth_qdio_start_poll,
.input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
.output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
.recover = qeth_l3_recover,
.setup = qeth_l3_probe_device,
.remove = qeth_l3_remove_device,
.set_online = qeth_l3_set_online,
.set_offline = qeth_l3_set_offline,
.shutdown = qeth_l3_shutdown,
.freeze = qeth_l3_pm_suspend,
.thaw = qeth_l3_pm_resume,
.restore = qeth_l3_pm_resume,
};
EXPORT_SYMBOL_GPL(qeth_l3_discipline);
static int qeth_l3_ip_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)ifa->ifa_dev->dev;
struct qeth_ipaddr *addr;
struct qeth_card *card;
if (dev_net(dev) != &init_net)
return NOTIFY_DONE;
card = qeth_l3_get_card_from_dev(dev);
if (!card)
return NOTIFY_DONE;
QETH_CARD_TEXT(card, 3, "ipevent");
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
if (addr != NULL) {
addr->u.a4.addr = ifa->ifa_address;
addr->u.a4.mask = ifa->ifa_mask;
addr->type = QETH_IP_TYPE_NORMAL;
} else
goto out;
switch (event) {
case NETDEV_UP:
if (!qeth_l3_add_ip(card, addr))
kfree(addr);
break;
case NETDEV_DOWN:
if (!qeth_l3_delete_ip(card, addr))
kfree(addr);
break;
default:
break;
}
qeth_l3_set_ip_addr_list(card);
out:
return NOTIFY_DONE;
}
static struct notifier_block qeth_l3_ip_notifier = {
qeth_l3_ip_event,
NULL,
};
#ifdef CONFIG_QETH_IPV6
/**
* IPv6 event handler
*/
static int qeth_l3_ip6_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
struct net_device *dev = (struct net_device *)ifa->idev->dev;
struct qeth_ipaddr *addr;
struct qeth_card *card;
card = qeth_l3_get_card_from_dev(dev);
if (!card)
return NOTIFY_DONE;
QETH_CARD_TEXT(card, 3, "ip6event");
if (!qeth_is_supported(card, IPA_IPV6))
return NOTIFY_DONE;
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
if (addr != NULL) {
memcpy(&addr->u.a6.addr, &ifa->addr, sizeof(struct in6_addr));
addr->u.a6.pfxlen = ifa->prefix_len;
addr->type = QETH_IP_TYPE_NORMAL;
} else
goto out;
switch (event) {
case NETDEV_UP:
if (!qeth_l3_add_ip(card, addr))
kfree(addr);
break;
case NETDEV_DOWN:
if (!qeth_l3_delete_ip(card, addr))
kfree(addr);
break;
default:
break;
}
qeth_l3_set_ip_addr_list(card);
out:
return NOTIFY_DONE;
}
static struct notifier_block qeth_l3_ip6_notifier = {
qeth_l3_ip6_event,
NULL,
};
#endif
static int qeth_l3_register_notifiers(void)
{
int rc;
QETH_DBF_TEXT(SETUP, 5, "regnotif");
rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
if (rc)
return rc;
#ifdef CONFIG_QETH_IPV6
rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
if (rc) {
unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
return rc;
}
#else
pr_warning("There is no IPv6 support for the layer 3 discipline\n");
#endif
return 0;
}
static void qeth_l3_unregister_notifiers(void)
{
QETH_DBF_TEXT(SETUP, 5, "unregnot");
BUG_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
#ifdef CONFIG_QETH_IPV6
BUG_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
#endif /* QETH_IPV6 */
}
static int __init qeth_l3_init(void)
{
int rc = 0;
pr_info("register layer 3 discipline\n");
rc = qeth_l3_register_notifiers();
return rc;
}
static void __exit qeth_l3_exit(void)
{
qeth_l3_unregister_notifiers();
pr_info("unregister layer 3 discipline\n");
}
module_init(qeth_l3_init);
module_exit(qeth_l3_exit);
MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
MODULE_DESCRIPTION("qeth layer 3 discipline");
MODULE_LICENSE("GPL");
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