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qeth: optimize IP handling in rx_mode callback

Browse source 
In layer3 mode of the qeth driver, multicast IP addresses
from struct net_device and other type of IP addresses
from other sources require mapping to the OSA-card.
This patch simplifies the IP address mapping logic, and changes imple-
mentation of ndo_set_rx_mode callback and ip notifier events.
Addresses are stored in private hashtables instead of lists now.
It allows hardware registration/removal for new/deleted multicast
addresses only.

Signed-off-by: Lakhvich Dmitriy <ldmitriy@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser@ru.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lakhvich Dmitriy 2016-06-16 16:18:58 +02:00 committed by David S. Miller
parent 6059c90537
commit 5f78e29cee
7 changed files with 487 additions and 463 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
drivers/s390/net/qeth_core.h
View file

@ -561,7 +561,6 @@ enum qeth_ip_types {
QETH_IP_TYPE_NORMAL,
QETH_IP_TYPE_VIPA,
QETH_IP_TYPE_RXIP,
QETH_IP_TYPE_DEL_ALL_MC,
};
enum qeth_cmd_buffer_state {
@ -742,17 +741,10 @@ struct qeth_vlan_vid {
unsigned short vid;
};
enum qeth_mac_disposition {
QETH_DISP_MAC_DELETE = 0,
QETH_DISP_MAC_DO_NOTHING = 1,
QETH_DISP_MAC_ADD = 2,
};
struct qeth_mac {
u8 mac_addr[OSA_ADDR_LEN];
u8 is_uc:1;
u8 disp_flag:2;
struct hlist_node hnode;
enum qeth_addr_disposition {
QETH_DISP_ADDR_DELETE = 0,
QETH_DISP_ADDR_DO_NOTHING = 1,
QETH_DISP_ADDR_ADD = 2,
};
struct qeth_rx {
@ -800,6 +792,8 @@ struct qeth_card {
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
struct list_head vid_list;
DECLARE_HASHTABLE(mac_htable, 4);
DECLARE_HASHTABLE(ip_htable, 4);
DECLARE_HASHTABLE(ip_mc_htable, 4);
struct work_struct kernel_thread_starter;
spinlock_t thread_mask_lock;
unsigned long thread_start_mask;
@ -807,8 +801,6 @@ struct qeth_card {
unsigned long thread_running_mask;
struct task_struct *recovery_task;
spinlock_t ip_lock;
struct list_head ip_list;
struct list_head *ip_tbd_list;
struct qeth_ipato ipato;
struct list_head cmd_waiter_list;
/* QDIO buffer handling */

10
drivers/s390/net/qeth_core_main.c
View file

@ -1464,8 +1464,6 @@ static int qeth_setup_card(struct qeth_card *card)
card->thread_allowed_mask = 0;
card->thread_running_mask = 0;
INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
INIT_LIST_HEAD(&card->ip_list);
INIT_LIST_HEAD(card->ip_tbd_list);
INIT_LIST_HEAD(&card->cmd_waiter_list);
init_waitqueue_head(&card->wait_q);
/* initial options */
@ -1500,11 +1498,6 @@ static struct qeth_card *qeth_alloc_card(void)
if (!card)
goto out;
QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
if (!card->ip_tbd_list) {
QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
goto out_card;
}
if (qeth_setup_channel(&card->read))
goto out_ip;
if (qeth_setup_channel(&card->write))
@ -1517,8 +1510,6 @@ static struct qeth_card *qeth_alloc_card(void)
out_channel:
qeth_clean_channel(&card->read);
out_ip:
kfree(card->ip_tbd_list);
out_card:
kfree(card);
out:
return NULL;
@ -4980,7 +4971,6 @@ static void qeth_core_free_card(struct qeth_card *card)
qeth_clean_channel(&card->write);
if (card->dev)
free_netdev(card->dev);
kfree(card->ip_tbd_list);
qeth_free_qdio_buffers(card);
unregister_service_level(&card->qeth_service_level);
kfree(card);

7
drivers/s390/net/qeth_l2.h
View file

@ -12,4 +12,11 @@ int qeth_l2_create_device_attributes(struct device *);
void qeth_l2_remove_device_attributes(struct device *);
void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card);
struct qeth_mac {
u8 mac_addr[OSA_ADDR_LEN];
u8 is_uc:1;
u8 disp_flag:2;
struct hlist_node hnode;
};
#endif /* __QETH_L2_H__ */

12
drivers/s390/net/qeth_l2_main.c
View file

@ -780,7 +780,7 @@ qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc)
qeth_l2_mac_hash(ha->addr)) {
if (is_uc == mac->is_uc &&
!memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
mac->disp_flag = QETH_DISP_MAC_DO_NOTHING;
mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
return;
}
}
@ -792,7 +792,7 @@ qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc)
memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
mac->is_uc = is_uc;
mac->disp_flag = QETH_DISP_MAC_ADD;
mac->disp_flag = QETH_DISP_ADDR_ADD;
hash_add(card->mac_htable, &mac->hnode,
qeth_l2_mac_hash(mac->mac_addr));
@ -825,7 +825,7 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
qeth_l2_add_mac(card, ha, 1);
hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
if (mac->disp_flag == QETH_DISP_MAC_DELETE) {
if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
if (!mac->is_uc)
rc = qeth_l2_send_delgroupmac(card,
mac->mac_addr);
@ -837,15 +837,15 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
hash_del(&mac->hnode);
kfree(mac);
} else if (mac->disp_flag == QETH_DISP_MAC_ADD) {
} else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
rc = qeth_l2_write_mac(card, mac);
if (rc) {
hash_del(&mac->hnode);
kfree(mac);
} else
mac->disp_flag = QETH_DISP_MAC_DELETE;
mac->disp_flag = QETH_DISP_ADDR_DELETE;
} else
mac->disp_flag = QETH_DISP_MAC_DELETE;
mac->disp_flag = QETH_DISP_ADDR_DELETE;
}
spin_unlock_bh(&card->mclock);

31
drivers/s390/net/qeth_l3.h
View file

@ -10,16 +10,23 @@
#define __QETH_L3_H__
#include "qeth_core.h"
#include <linux/hashtable.h>
#define QETH_SNIFF_AVAIL 0x0008
struct qeth_ipaddr {
struct list_head entry;
struct hlist_node hnode;
enum qeth_ip_types type;
enum qeth_ipa_setdelip_flags set_flags;
enum qeth_ipa_setdelip_flags del_flags;
int is_multicast;
int users;
u8 is_multicast:1;
u8 in_progress:1;
u8 disp_flag:2;
/* is changed only for normal ip addresses
* for non-normal addresses it always is 1
*/
int ref_counter;
enum qeth_prot_versions proto;
unsigned char mac[OSA_ADDR_LEN];
union {
@ -32,7 +39,24 @@ struct qeth_ipaddr {
unsigned int pfxlen;
} a6;
} u;
};
static inline u64 qeth_l3_ipaddr_hash(struct qeth_ipaddr *addr)
{
u64 ret = 0;
u8 *point;
if (addr->proto == QETH_PROT_IPV6) {
point = (u8 *) &addr->u.a6.addr;
ret = get_unaligned((u64 *)point) ^
get_unaligned((u64 *) (point + 8));
}
if (addr->proto == QETH_PROT_IPV4) {
point = (u8 *) &addr->u.a4.addr;
ret = get_unaligned((u32 *) point);
}
return ret;
}
struct qeth_ipato_entry {
struct list_head entry;
@ -60,6 +84,5 @@ int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *, struct qeth_ipaddr *);
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 *);
void qeth_l3_set_ip_addr_list(struct qeth_card *);
#endif /* __QETH_L3_H__ */

792
drivers/s390/net/qeth_l3_main.c
View file

File diff suppressed because it is too large Load diff

78
drivers/s390/net/qeth_l3_sys.c
View file

@ -8,6 +8,7 @@
#include <linux/slab.h>
#include <asm/ebcdic.h>
#include <linux/hashtable.h>
#include "qeth_l3.h"
#define QETH_DEVICE_ATTR(_id, _name, _mode, _show, _store) \
@ -285,19 +286,19 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
if (card->options.hsuid[0]) {
/* delete old ip address */
addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
if (addr != NULL) {
addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
addr->u.a6.addr.s6_addr32[1] = 0x00000000;
for (i = 8; i < 16; i++)
addr->u.a6.addr.s6_addr[i] =
card->options.hsuid[i - 8];
addr->u.a6.pfxlen = 0;
addr->type = QETH_IP_TYPE_NORMAL;
} else
if (!addr)
return -ENOMEM;
if (!qeth_l3_delete_ip(card, addr))
kfree(addr);
qeth_l3_set_ip_addr_list(card);
addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
addr->u.a6.addr.s6_addr32[1] = 0x00000000;
for (i = 8; i < 16; i++)
addr->u.a6.addr.s6_addr[i] =
card->options.hsuid[i - 8];
addr->u.a6.pfxlen = 0;
addr->type = QETH_IP_TYPE_NORMAL;
qeth_l3_delete_ip(card, addr);
kfree(addr);
}
if (strlen(tmp) == 0) {
@ -328,9 +329,8 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
addr->type = QETH_IP_TYPE_NORMAL;
} else
return -ENOMEM;
if (!qeth_l3_add_ip(card, addr))
kfree(addr);
qeth_l3_set_ip_addr_list(card);
qeth_l3_add_ip(card, addr);
kfree(addr);
return count;
}
@ -367,8 +367,8 @@ 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 *tmpipa, *t;
int rc = 0;
struct qeth_ipaddr *addr;
int i, rc = 0;
if (!card)
return -EINVAL;
@ -384,21 +384,20 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
card->ipato.enabled = (card->ipato.enabled)? 0 : 1;
} else if (sysfs_streq(buf, "1")) {
card->ipato.enabled = 1;
list_for_each_entry_safe(tmpipa, t, card->ip_tbd_list, entry) {
if ((tmpipa->type == QETH_IP_TYPE_NORMAL) &&
qeth_l3_is_addr_covered_by_ipato(card, tmpipa))
tmpipa->set_flags |=
hash_for_each(card->ip_htable, i, addr, hnode) {
if ((addr->type == QETH_IP_TYPE_NORMAL) &&
qeth_l3_is_addr_covered_by_ipato(card, addr))
addr->set_flags |=
QETH_IPA_SETIP_TAKEOVER_FLAG;
}
}
} else if (sysfs_streq(buf, "0")) {
card->ipato.enabled = 0;
list_for_each_entry_safe(tmpipa, t, card->ip_tbd_list, entry) {
if (tmpipa->set_flags &
QETH_IPA_SETIP_TAKEOVER_FLAG)
tmpipa->set_flags &=
~QETH_IPA_SETIP_TAKEOVER_FLAG;
}
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->set_flags &
QETH_IPA_SETIP_TAKEOVER_FLAG)
addr->set_flags &=
~QETH_IPA_SETIP_TAKEOVER_FLAG;
}
} else
rc = -EINVAL;
out:
@ -452,7 +451,6 @@ static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
enum qeth_prot_versions proto)
{
struct qeth_ipato_entry *ipatoe;
unsigned long flags;
char addr_str[40];
int entry_len; /* length of 1 entry string, differs between v4 and v6 */
int i = 0;
@ -460,7 +458,7 @@ static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
/* add strlen for "/<mask>\n" */
entry_len += (proto == QETH_PROT_IPV4)? 5 : 6;
spin_lock_irqsave(&card->ip_lock, flags);
spin_lock_bh(&card->ip_lock);
list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
if (ipatoe->proto != proto)
continue;
@ -473,7 +471,7 @@ static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
i += snprintf(buf + i, PAGE_SIZE - i,
"%s/%i\n", addr_str, ipatoe->mask_bits);
}
spin_unlock_irqrestore(&card->ip_lock, flags);
spin_unlock_bh(&card->ip_lock);
i += snprintf(buf + i, PAGE_SIZE - i, "\n");
return i;
@ -689,15 +687,15 @@ static ssize_t qeth_l3_dev_vipa_add_show(char *buf, struct qeth_card *card,
enum qeth_prot_versions proto)
{
struct qeth_ipaddr *ipaddr;
struct hlist_node *tmp;
char addr_str[40];
int entry_len; /* length of 1 entry string, differs between v4 and v6 */
unsigned long flags;
int i = 0;
entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
entry_len += 2; /* \n + terminator */
spin_lock_irqsave(&card->ip_lock, flags);
list_for_each_entry(ipaddr, &card->ip_list, entry) {
spin_lock_bh(&card->ip_lock);
hash_for_each_safe(card->ip_htable, i, tmp, ipaddr, hnode) {
if (ipaddr->proto != proto)
continue;
if (ipaddr->type != QETH_IP_TYPE_VIPA)
@ -711,7 +709,7 @@ static ssize_t qeth_l3_dev_vipa_add_show(char *buf, struct qeth_card *card,
addr_str);
i += snprintf(buf + i, PAGE_SIZE - i, "%s\n", addr_str);
}
spin_unlock_irqrestore(&card->ip_lock, flags);
spin_unlock_bh(&card->ip_lock);
i += snprintf(buf + i, PAGE_SIZE - i, "\n");
return i;
@ -851,15 +849,15 @@ static ssize_t qeth_l3_dev_rxip_add_show(char *buf, struct qeth_card *card,
enum qeth_prot_versions proto)
{
struct qeth_ipaddr *ipaddr;
struct hlist_node *tmp;
char addr_str[40];
int entry_len; /* length of 1 entry string, differs between v4 and v6 */
unsigned long flags;
int i = 0;
entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
entry_len += 2; /* \n + terminator */
spin_lock_irqsave(&card->ip_lock, flags);
list_for_each_entry(ipaddr, &card->ip_list, entry) {
spin_lock_bh(&card->ip_lock);
hash_for_each_safe(card->ip_htable, i, tmp, ipaddr, hnode) {
if (ipaddr->proto != proto)
continue;
if (ipaddr->type != QETH_IP_TYPE_RXIP)
@ -873,7 +871,7 @@ static ssize_t qeth_l3_dev_rxip_add_show(char *buf, struct qeth_card *card,
addr_str);
i += snprintf(buf + i, PAGE_SIZE - i, "%s\n", addr_str);
}
spin_unlock_irqrestore(&card->ip_lock, flags);
spin_unlock_bh(&card->ip_lock);
i += snprintf(buf + i, PAGE_SIZE - i, "\n");
return i;