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path: root/drivers/s390/net/qeth_l3_main.c
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Diffstat (limited to 'drivers/s390/net/qeth_l3_main.c')
-rw-r--r--drivers/s390/net/qeth_l3_main.c123
1 files changed, 53 insertions, 70 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index b0c888e86cd4..962a04b68dd2 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -67,6 +67,24 @@ void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
qeth_l3_ipaddr6_to_string(addr, buf);
}
+static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
+ struct qeth_ipaddr *query)
+{
+ u64 key = qeth_l3_ipaddr_hash(query);
+ struct qeth_ipaddr *addr;
+
+ if (query->is_multicast) {
+ hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
+ if (qeth_l3_addr_match_ip(addr, query))
+ return addr;
+ } else {
+ hash_for_each_possible(card->ip_htable, addr, hnode, key)
+ if (qeth_l3_addr_match_ip(addr, query))
+ return addr;
+ }
+ return NULL;
+}
+
static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
{
int i, j;
@@ -120,34 +138,6 @@ static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
return rc;
}
-inline int
-qeth_l3_ipaddrs_is_equal(struct qeth_ipaddr *addr1, struct qeth_ipaddr *addr2)
-{
- return addr1->proto == addr2->proto &&
- !memcmp(&addr1->u, &addr2->u, sizeof(addr1->u)) &&
- ether_addr_equal_64bits(addr1->mac, addr2->mac);
-}
-
-static struct qeth_ipaddr *
-qeth_l3_ip_from_hash(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
-{
- struct qeth_ipaddr *addr;
-
- if (tmp_addr->is_multicast) {
- hash_for_each_possible(card->ip_mc_htable, addr,
- hnode, qeth_l3_ipaddr_hash(tmp_addr))
- if (qeth_l3_ipaddrs_is_equal(tmp_addr, addr))
- return addr;
- } else {
- hash_for_each_possible(card->ip_htable, addr,
- hnode, qeth_l3_ipaddr_hash(tmp_addr))
- if (qeth_l3_ipaddrs_is_equal(tmp_addr, addr))
- return addr;
- }
-
- return NULL;
-}
-
int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
@@ -162,23 +152,18 @@ int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
}
- addr = qeth_l3_ip_from_hash(card, tmp_addr);
- if (!addr)
+ addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
+ if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
return -ENOENT;
addr->ref_counter--;
- if (addr->ref_counter > 0 && (addr->type == QETH_IP_TYPE_NORMAL ||
- addr->type == QETH_IP_TYPE_RXIP))
+ if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
return rc;
if (addr->in_progress)
return -EINPROGRESS;
- if (!qeth_card_hw_is_reachable(card)) {
- addr->disp_flag = QETH_DISP_ADDR_DELETE;
- return 0;
- }
-
- rc = qeth_l3_deregister_addr_entry(card, addr);
+ if (qeth_card_hw_is_reachable(card))
+ rc = qeth_l3_deregister_addr_entry(card, addr);
hash_del(&addr->hnode);
kfree(addr);
@@ -190,6 +175,7 @@ int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
struct qeth_ipaddr *addr;
+ char buf[40];
QETH_CARD_TEXT(card, 4, "addip");
@@ -200,8 +186,20 @@ int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
}
- addr = qeth_l3_ip_from_hash(card, tmp_addr);
- if (!addr) {
+ addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
+ if (addr) {
+ if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
+ return -EADDRINUSE;
+ if (qeth_l3_addr_match_all(addr, tmp_addr)) {
+ addr->ref_counter++;
+ return 0;
+ }
+ qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
+ buf);
+ dev_warn(&card->gdev->dev,
+ "Registering IP address %s failed\n", buf);
+ return -EADDRINUSE;
+ } else {
addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
if (!addr)
return -ENOMEM;
@@ -241,19 +239,15 @@ int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
(rc == IPA_RC_LAN_OFFLINE)) {
addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
if (addr->ref_counter < 1) {
- qeth_l3_delete_ip(card, addr);
+ qeth_l3_deregister_addr_entry(card, addr);
+ hash_del(&addr->hnode);
kfree(addr);
}
} else {
hash_del(&addr->hnode);
kfree(addr);
}
- } else {
- if (addr->type == QETH_IP_TYPE_NORMAL ||
- addr->type == QETH_IP_TYPE_RXIP)
- addr->ref_counter++;
}
-
return rc;
}
@@ -321,11 +315,7 @@ static void qeth_l3_recover_ip(struct qeth_card *card)
spin_lock_bh(&card->ip_lock);
hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
- if (addr->disp_flag == QETH_DISP_ADDR_DELETE) {
- qeth_l3_deregister_addr_entry(card, addr);
- hash_del(&addr->hnode);
- kfree(addr);
- } else if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
+ if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
if (addr->proto == QETH_PROT_IPV4) {
addr->in_progress = 1;
spin_unlock_bh(&card->ip_lock);
@@ -643,12 +633,7 @@ int qeth_l3_add_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
return -ENOMEM;
spin_lock_bh(&card->ip_lock);
-
- if (qeth_l3_ip_from_hash(card, ipaddr))
- rc = -EEXIST;
- else
- rc = qeth_l3_add_ip(card, ipaddr);
-
+ rc = qeth_l3_add_ip(card, ipaddr);
spin_unlock_bh(&card->ip_lock);
kfree(ipaddr);
@@ -713,12 +698,7 @@ int qeth_l3_add_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
return -ENOMEM;
spin_lock_bh(&card->ip_lock);
-
- if (qeth_l3_ip_from_hash(card, ipaddr))
- rc = -EEXIST;
- else
- rc = qeth_l3_add_ip(card, ipaddr);
-
+ rc = qeth_l3_add_ip(card, ipaddr);
spin_unlock_bh(&card->ip_lock);
kfree(ipaddr);
@@ -1239,8 +1219,9 @@ qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
tmp->u.a4.addr = be32_to_cpu(im4->multiaddr);
tmp->is_multicast = 1;
- ipm = qeth_l3_ip_from_hash(card, tmp);
+ ipm = qeth_l3_find_addr_by_ip(card, tmp);
if (ipm) {
+ /* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
} else {
ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
@@ -1319,8 +1300,9 @@ static void qeth_l3_add_mc6_to_hash(struct qeth_card *card,
sizeof(struct in6_addr));
tmp->is_multicast = 1;
- ipm = qeth_l3_ip_from_hash(card, tmp);
+ ipm = qeth_l3_find_addr_by_ip(card, tmp);
if (ipm) {
+ /* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
continue;
}
@@ -2450,11 +2432,12 @@ static void qeth_tso_fill_header(struct qeth_card *card,
static int qeth_l3_get_elements_no_tso(struct qeth_card *card,
struct sk_buff *skb, int extra_elems)
{
- addr_t tcpdptr = (addr_t)tcp_hdr(skb) + tcp_hdrlen(skb);
- int elements = qeth_get_elements_for_range(
- tcpdptr,
- (addr_t)skb->data + skb_headlen(skb)) +
- qeth_get_elements_for_frags(skb);
+ addr_t start = (addr_t)tcp_hdr(skb) + tcp_hdrlen(skb);
+ addr_t end = (addr_t)skb->data + skb_headlen(skb);
+ int elements = qeth_get_elements_for_frags(skb);
+
+ if (start != end)
+ elements += qeth_get_elements_for_range(start, end);
if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
QETH_DBF_MESSAGE(2,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.