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s390/qeth: update takeover IPs after configuration change 

Any modification to the takeover IP-ranges requires that we re-evaluate
which IP addresses are takeover-eligible. Otherwise we might do takeover
for some addresses when we no longer should, or vice-versa.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2017-12-13 18:56:32 +01:00 committed by David S. Miller
parent 8a03a3692b
commit 02f510f326
5 changed files with 67 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/s390/net/qeth_core.h
View File

@ -566,8 +566,8 @@ enum qeth_cq {
struct qeth_ipato {
bool enabled;
int invert4;
int invert6;
bool invert4;
bool invert6;
struct list_head entries;
};

4
drivers/s390/net/qeth_core_main.c
View File

@ -1481,8 +1481,8 @@ static int qeth_setup_card(struct qeth_card *card)
/* IP address takeover */
INIT_LIST_HEAD(&card->ipato.entries);
card->ipato.enabled = false;
card->ipato.invert4 = 0;
card->ipato.invert6 = 0;
card->ipato.invert4 = false;
card->ipato.invert6 = false;
/* init QDIO stuff */
qeth_init_qdio_info(card);
INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);

2
drivers/s390/net/qeth_l3.h
View File

@ -82,7 +82,7 @@ void qeth_l3_del_vipa(struct qeth_card *, enum qeth_prot_versions, const u8 *);
int qeth_l3_add_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *);
void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions,
const u8 *);
int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *, struct qeth_ipaddr *);
void qeth_l3_update_ipato(struct qeth_card *card);
struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions);
int qeth_l3_add_ip(struct qeth_card *, struct qeth_ipaddr *);
int qeth_l3_delete_ip(struct qeth_card *, struct qeth_ipaddr *);

31
drivers/s390/net/qeth_l3_main.c
View File

@ -164,8 +164,8 @@ static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
}
}
int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
struct qeth_ipaddr *addr)
static bool 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, };
@ -606,6 +606,27 @@ int qeth_l3_setrouting_v6(struct qeth_card *card)
/*
* IP address takeover related functions
*/
/**
* qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
*
* Caller must hold ip_lock.
*/
void qeth_l3_update_ipato(struct qeth_card *card)
{
struct qeth_ipaddr *addr;
unsigned int i;
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->type != QETH_IP_TYPE_NORMAL)
continue;
if (qeth_l3_is_addr_covered_by_ipato(card, addr))
addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
else
addr->set_flags &= ~QETH_IPA_SETIP_TAKEOVER_FLAG;
}
}
static void qeth_l3_clear_ipato_list(struct qeth_card *card)
{
struct qeth_ipato_entry *ipatoe, *tmp;
@ -617,6 +638,7 @@ static void qeth_l3_clear_ipato_list(struct qeth_card *card)
kfree(ipatoe);
}
qeth_l3_update_ipato(card);
spin_unlock_bh(&card->ip_lock);
}
@ -641,8 +663,10 @@ int qeth_l3_add_ipato_entry(struct qeth_card *card,
}
}
if (!rc)
if (!rc) {
list_add_tail(&new->entry, &card->ipato.entries);
qeth_l3_update_ipato(card);
}
spin_unlock_bh(&card->ip_lock);
@ -665,6 +689,7 @@ void qeth_l3_del_ipato_entry(struct qeth_card *card,
(proto == QETH_PROT_IPV4)? 4:16) &&
(ipatoe->mask_bits == mask_bits)) {
list_del(&ipatoe->entry);
qeth_l3_update_ipato(card);
kfree(ipatoe);
}
}

63
drivers/s390/net/qeth_l3_sys.c
View File

@ -370,9 +370,8 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
struct qeth_ipaddr *addr;
int i, rc = 0;
bool enable;
int rc = 0;
if (!card)
return -EINVAL;
@ -391,20 +390,12 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
goto out;
}
if (card->ipato.enabled == enable)
goto out;
card->ipato.enabled = enable;
spin_lock_bh(&card->ip_lock);
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->type != QETH_IP_TYPE_NORMAL)
continue;
if (!enable)
addr->set_flags &= ~QETH_IPA_SETIP_TAKEOVER_FLAG;
else if (qeth_l3_is_addr_covered_by_ipato(card, addr))
addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
if (card->ipato.enabled != enable) {
card->ipato.enabled = enable;
spin_lock_bh(&card->ip_lock);
qeth_l3_update_ipato(card);
spin_unlock_bh(&card->ip_lock);
}
spin_unlock_bh(&card->ip_lock);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
@ -430,20 +421,27 @@ static ssize_t qeth_l3_dev_ipato_invert4_store(struct device *dev,
const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
bool invert;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (sysfs_streq(buf, "toggle"))
card->ipato.invert4 = (card->ipato.invert4)? 0 : 1;
else if (sysfs_streq(buf, "1"))
card->ipato.invert4 = 1;
else if (sysfs_streq(buf, "0"))
card->ipato.invert4 = 0;
else
if (sysfs_streq(buf, "toggle")) {
invert = !card->ipato.invert4;
} else if (kstrtobool(buf, &invert)) {
rc = -EINVAL;
goto out;
}
if (card->ipato.invert4 != invert) {
card->ipato.invert4 = invert;
spin_lock_bh(&card->ip_lock);
qeth_l3_update_ipato(card);
spin_unlock_bh(&card->ip_lock);
}
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
@ -609,20 +607,27 @@ static ssize_t qeth_l3_dev_ipato_invert6_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
bool invert;
int rc = 0;
if (!card)
return -EINVAL;
mutex_lock(&card->conf_mutex);
if (sysfs_streq(buf, "toggle"))
card->ipato.invert6 = (card->ipato.invert6)? 0 : 1;
else if (sysfs_streq(buf, "1"))
card->ipato.invert6 = 1;
else if (sysfs_streq(buf, "0"))
card->ipato.invert6 = 0;
else
if (sysfs_streq(buf, "toggle")) {
invert = !card->ipato.invert6;
} else if (kstrtobool(buf, &invert)) {
rc = -EINVAL;
goto out;
}
if (card->ipato.invert6 != invert) {
card->ipato.invert6 = invert;
spin_lock_bh(&card->ip_lock);
qeth_l3_update_ipato(card);
spin_unlock_bh(&card->ip_lock);
}
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}