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libcxgbi: Add ipv6 api to driver
Signed-off-by: Anish Bhatt <anish@chelsio.com> Signed-off-by: Karen Xie <kxie@chelsio.com> Signed-off-by: Manoj Malviya <manojmalviya@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anish Bhatt
David S. Miller
parent
a3e3b2857d
commit
fc8d0590d9
2 changed files with 237 additions and 21 deletions
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@ -24,6 +24,10 @@
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#include <linux/inet.h>
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#include <net/dst.h>
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#include <net/route.h>
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#include <net/ipv6.h>
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#include <net/ip6_route.h>
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#include <net/addrconf.h>
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#include <linux/inetdevice.h> /* ip_dev_find */
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#include <linux/module.h>
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#include <net/tcp.h>
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@ -193,8 +197,8 @@ struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
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static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
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int *port)
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struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
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int *port)
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{
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struct net_device *vdev = NULL;
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struct cxgbi_device *cdev, *tmp;
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@ -224,6 +228,40 @@ static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
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"ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
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static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
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int *port)
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{
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struct net_device *vdev = NULL;
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struct cxgbi_device *cdev, *tmp;
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int i;
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if (ndev->priv_flags & IFF_802_1Q_VLAN) {
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vdev = ndev;
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ndev = vlan_dev_real_dev(ndev);
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pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
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}
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mutex_lock(&cdev_mutex);
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list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
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for (i = 0; i < cdev->nports; i++) {
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if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
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MAX_ADDR_LEN)) {
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cdev->hbas[i]->vdev = vdev;
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mutex_unlock(&cdev_mutex);
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if (port)
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*port = i;
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return cdev;
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}
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}
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}
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mutex_unlock(&cdev_mutex);
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log_debug(1 << CXGBI_DBG_DEV,
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"ndev 0x%p, %s, NO match mac found.\n",
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ndev, ndev->name);
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return NULL;
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}
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void cxgbi_hbas_remove(struct cxgbi_device *cdev)
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{
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@ -320,6 +358,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
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struct cxgbi_ports_map *pmap = &cdev->pmap;
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unsigned int start;
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int idx;
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__be16 *port;
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if (!pmap->max_connect) {
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pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
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@ -327,9 +366,14 @@ static int sock_get_port(struct cxgbi_sock *csk)
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return -EADDRNOTAVAIL;
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}
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if (csk->saddr.sin_port) {
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if (csk->csk_family == AF_INET)
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port = &csk->saddr.sin_port;
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else /* ipv6 */
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port = &csk->saddr6.sin6_port;
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if (*port) {
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pr_err("source port NON-ZERO %u.\n",
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ntohs(csk->saddr.sin_port));
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ntohs(*port));
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return -EADDRINUSE;
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}
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@ -347,8 +391,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
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idx = 0;
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if (!pmap->port_csk[idx]) {
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pmap->used++;
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csk->saddr.sin_port =
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htons(pmap->sport_base + idx);
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*port = htons(pmap->sport_base + idx);
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pmap->next = idx;
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pmap->port_csk[idx] = csk;
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spin_unlock_bh(&pmap->lock);
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@ -374,16 +417,22 @@ static void sock_put_port(struct cxgbi_sock *csk)
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{
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struct cxgbi_device *cdev = csk->cdev;
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struct cxgbi_ports_map *pmap = &cdev->pmap;
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__be16 *port;
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if (csk->saddr.sin_port) {
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int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base;
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if (csk->csk_family == AF_INET)
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port = &csk->saddr.sin_port;
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else /* ipv6 */
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port = &csk->saddr6.sin6_port;
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csk->saddr.sin_port = 0;
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if (*port) {
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int idx = ntohs(*port) - pmap->sport_base;
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*port = 0;
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if (idx < 0 || idx >= pmap->max_connect) {
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pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
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cdev, csk->port_id,
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cdev->ports[csk->port_id]->name,
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ntohs(csk->saddr.sin_port));
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ntohs(*port));
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return;
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}
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@ -479,17 +528,11 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
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int port = 0xFFFF;
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int err = 0;
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if (daddr->sin_family != AF_INET) {
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pr_info("address family 0x%x NOT supported.\n",
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daddr->sin_family);
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err = -EAFNOSUPPORT;
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goto err_out;
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}
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rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
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if (!rt) {
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pr_info("no route to ipv4 0x%x, port %u.\n",
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daddr->sin_addr.s_addr, daddr->sin_port);
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be32_to_cpu(daddr->sin_addr.s_addr),
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be16_to_cpu(daddr->sin_port));
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err = -ENETUNREACH;
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goto err_out;
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}
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@ -537,9 +580,12 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
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csk->port_id = port;
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csk->mtu = mtu;
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csk->dst = dst;
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csk->csk_family = AF_INET;
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csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
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csk->daddr.sin_port = daddr->sin_port;
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csk->daddr.sin_family = daddr->sin_family;
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csk->saddr.sin_family = daddr->sin_family;
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csk->saddr.sin_addr.s_addr = fl4.saddr;
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neigh_release(n);
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@ -556,6 +602,121 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
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return ERR_PTR(err);
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}
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static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
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const struct in6_addr *daddr)
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{
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struct flowi6 fl;
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if (saddr)
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memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
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if (daddr)
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memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
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return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
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}
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static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
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{
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struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
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struct dst_entry *dst;
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struct net_device *ndev;
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struct cxgbi_device *cdev;
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struct rt6_info *rt = NULL;
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struct neighbour *n;
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struct in6_addr pref_saddr;
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struct cxgbi_sock *csk = NULL;
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unsigned int mtu = 0;
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int port = 0xFFFF;
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int err = 0;
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rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
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if (!rt) {
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pr_info("no route to ipv6 %pI6 port %u\n",
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daddr6->sin6_addr.s6_addr,
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be16_to_cpu(daddr6->sin6_port));
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err = -ENETUNREACH;
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goto err_out;
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}
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dst = &rt->dst;
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n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
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if (!n) {
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pr_info("%pI6, port %u, dst no neighbour.\n",
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daddr6->sin6_addr.s6_addr,
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be16_to_cpu(daddr6->sin6_port));
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err = -ENETUNREACH;
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goto rel_rt;
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}
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ndev = n->dev;
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if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
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pr_info("multi-cast route %pI6 port %u, dev %s.\n",
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daddr6->sin6_addr.s6_addr,
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ntohs(daddr6->sin6_port), ndev->name);
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err = -ENETUNREACH;
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goto rel_rt;
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}
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cdev = cxgbi_device_find_by_netdev(ndev, &port);
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if (!cdev)
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cdev = cxgbi_device_find_by_mac(ndev, &port);
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if (!cdev) {
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pr_info("dst %pI6 %s, NOT cxgbi device.\n",
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daddr6->sin6_addr.s6_addr, ndev->name);
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err = -ENETUNREACH;
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goto rel_rt;
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}
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log_debug(1 << CXGBI_DBG_SOCK,
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"route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
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daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
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ndev->name, cdev);
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csk = cxgbi_sock_create(cdev);
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if (!csk) {
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err = -ENOMEM;
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goto rel_rt;
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}
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csk->cdev = cdev;
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csk->port_id = port;
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csk->mtu = mtu;
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csk->dst = dst;
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if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
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struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
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err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
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&daddr6->sin6_addr, 0, &pref_saddr);
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if (err) {
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pr_info("failed to get source address to reach %pI6\n",
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&daddr6->sin6_addr);
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goto rel_rt;
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}
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} else {
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pref_saddr = rt->rt6i_prefsrc.addr;
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}
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csk->csk_family = AF_INET6;
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csk->daddr6.sin6_addr = daddr6->sin6_addr;
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csk->daddr6.sin6_port = daddr6->sin6_port;
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csk->daddr6.sin6_family = daddr6->sin6_family;
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csk->saddr6.sin6_addr = pref_saddr;
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neigh_release(n);
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return csk;
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rel_rt:
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if (n)
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neigh_release(n);
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ip6_rt_put(rt);
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if (csk)
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cxgbi_sock_closed(csk);
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err_out:
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return ERR_PTR(err);
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}
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void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
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unsigned int opt)
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{
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@ -2194,6 +2355,34 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
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}
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EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
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static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
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{
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int len;
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cxgbi_sock_get(csk);
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len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
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cxgbi_sock_put(csk);
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return len;
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}
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static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
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{
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int len;
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cxgbi_sock_get(csk);
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if (csk->csk_family == AF_INET)
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len = sprintf(buf, "%pI4",
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&csk->daddr.sin_addr.s_addr);
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else
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len = sprintf(buf, "%pI6",
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&csk->daddr6.sin6_addr);
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cxgbi_sock_put(csk);
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return len;
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}
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int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
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char *buf)
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{
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@ -2447,7 +2636,17 @@ struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
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}
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}
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csk = cxgbi_check_route(dst_addr);
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if (dst_addr->sa_family == AF_INET) {
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csk = cxgbi_check_route(dst_addr);
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} else if (dst_addr->sa_family == AF_INET6) {
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csk = cxgbi_check_route6(dst_addr);
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} else {
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pr_info("address family 0x%x NOT supported.\n",
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dst_addr->sa_family);
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err = -EAFNOSUPPORT;
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return (struct iscsi_endpoint *)ERR_PTR(err);
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}
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if (IS_ERR(csk))
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return (struct iscsi_endpoint *)csk;
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cxgbi_sock_get(csk);
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@ -44,6 +44,15 @@ enum cxgbi_dbg_flag {
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pr_info(fmt, ##__VA_ARGS__); \
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} while (0)
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#define pr_info_ipaddr(fmt_trail, \
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addr1, addr2, args_trail...) \
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do { \
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if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \
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break; \
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pr_info("%pISpc - %pISpc, " fmt_trail, \
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addr1, addr2, args_trail); \
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} while (0)
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/* max. connections per adapter */
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#define CXGBI_MAX_CONN 16384
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@ -202,8 +211,15 @@ struct cxgbi_sock {
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spinlock_t lock;
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struct kref refcnt;
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unsigned int state;
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struct sockaddr_in saddr;
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struct sockaddr_in daddr;
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unsigned int csk_family;
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union {
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struct sockaddr_in saddr;
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struct sockaddr_in6 saddr6;
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};
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union {
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struct sockaddr_in daddr;
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struct sockaddr_in6 daddr6;
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};
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struct dst_entry *dst;
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struct sk_buff_head receive_queue;
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struct sk_buff_head write_queue;
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@ -692,6 +708,7 @@ struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
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void cxgbi_device_unregister(struct cxgbi_device *);
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void cxgbi_device_unregister_all(unsigned int flag);
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struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
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struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
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int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int,
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struct scsi_host_template *,
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struct scsi_transport_template *);
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