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Date: Thu, 17 Jul 2014 00:18:17 -0700
From: Anish Bhatt <anish@...lsio.com>
To: netdev@...r.kernel.org
Cc: linux-rdma@...r.kernel.org, linux-scsi@...r.kernel.org,
davem@...emloft.net, roland@...estorage.com, hch@...radead.org,
michaelc@...wisc.edu, jbottomley@...allels.com, kxie@...lsio.com,
leedom@...lsio.com, hariprasad@...lsio.com,
swise@...ngridcomputing.com, Anish Bhatt <anish@...lsio.com>,
Manoj Malviya <manojmalviya@...lsio.com>
Subject: [PATCH net-next v2 3/4] libcxgbi: Add ipv6 api to driver
Signed-off-by: Anish Bhatt <anish@...lsio.com>
Signed-off-by: Karen Xie <kxie@...lsio.com>
Signed-off-by: Manoj Malviya <manojmalviya@...lsio.com>
---
drivers/scsi/cxgbi/libcxgbi.c | 237 ++++++++++++++++++++++++++++++++++++++----
drivers/scsi/cxgbi/libcxgbi.h | 21 +++-
2 files changed, 237 insertions(+), 21 deletions(-)
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index b44c1cff3114..d2fe507fc695 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -24,6 +24,10 @@
#include <linux/inet.h>
#include <net/dst.h>
#include <net/route.h>
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+
#include <linux/inetdevice.h> /* ip_dev_find */
#include <linux/module.h>
#include <net/tcp.h>
@@ -193,8 +197,8 @@ struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
}
EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
-static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
- int *port)
+struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
+ int *port)
{
struct net_device *vdev = NULL;
struct cxgbi_device *cdev, *tmp;
@@ -224,6 +228,40 @@ static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
"ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
return NULL;
}
+EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
+
+static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
+ int *port)
+{
+ struct net_device *vdev = NULL;
+ struct cxgbi_device *cdev, *tmp;
+ int i;
+
+ if (ndev->priv_flags & IFF_802_1Q_VLAN) {
+ vdev = ndev;
+ ndev = vlan_dev_real_dev(ndev);
+ pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
+ }
+
+ mutex_lock(&cdev_mutex);
+ list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
+ for (i = 0; i < cdev->nports; i++) {
+ if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
+ MAX_ADDR_LEN)) {
+ cdev->hbas[i]->vdev = vdev;
+ mutex_unlock(&cdev_mutex);
+ if (port)
+ *port = i;
+ return cdev;
+ }
+ }
+ }
+ mutex_unlock(&cdev_mutex);
+ log_debug(1 << CXGBI_DBG_DEV,
+ "ndev 0x%p, %s, NO match mac found.\n",
+ ndev, ndev->name);
+ return NULL;
+}
void cxgbi_hbas_remove(struct cxgbi_device *cdev)
{
@@ -320,6 +358,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
struct cxgbi_ports_map *pmap = &cdev->pmap;
unsigned int start;
int idx;
+ __be16 *port;
if (!pmap->max_connect) {
pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
@@ -327,9 +366,14 @@ static int sock_get_port(struct cxgbi_sock *csk)
return -EADDRNOTAVAIL;
}
- if (csk->saddr.sin_port) {
+ if (csk->csk_family == AF_INET)
+ port = &csk->saddr.sin_port;
+ else /* ipv6 */
+ port = &csk->saddr6.sin6_port;
+
+ if (*port) {
pr_err("source port NON-ZERO %u.\n",
- ntohs(csk->saddr.sin_port));
+ ntohs(*port));
return -EADDRINUSE;
}
@@ -347,8 +391,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
idx = 0;
if (!pmap->port_csk[idx]) {
pmap->used++;
- csk->saddr.sin_port =
- htons(pmap->sport_base + idx);
+ *port = htons(pmap->sport_base + idx);
pmap->next = idx;
pmap->port_csk[idx] = csk;
spin_unlock_bh(&pmap->lock);
@@ -374,16 +417,22 @@ static void sock_put_port(struct cxgbi_sock *csk)
{
struct cxgbi_device *cdev = csk->cdev;
struct cxgbi_ports_map *pmap = &cdev->pmap;
+ __be16 *port;
- if (csk->saddr.sin_port) {
- int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base;
+ if (csk->csk_family == AF_INET)
+ port = &csk->saddr.sin_port;
+ else /* ipv6 */
+ port = &csk->saddr6.sin6_port;
- csk->saddr.sin_port = 0;
+ if (*port) {
+ int idx = ntohs(*port) - pmap->sport_base;
+
+ *port = 0;
if (idx < 0 || idx >= pmap->max_connect) {
pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
cdev, csk->port_id,
cdev->ports[csk->port_id]->name,
- ntohs(csk->saddr.sin_port));
+ ntohs(*port));
return;
}
@@ -479,17 +528,11 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
int port = 0xFFFF;
int err = 0;
- if (daddr->sin_family != AF_INET) {
- pr_info("address family 0x%x NOT supported.\n",
- daddr->sin_family);
- err = -EAFNOSUPPORT;
- goto err_out;
- }
-
rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
if (!rt) {
pr_info("no route to ipv4 0x%x, port %u.\n",
- daddr->sin_addr.s_addr, daddr->sin_port);
+ be32_to_cpu(daddr->sin_addr.s_addr),
+ be16_to_cpu(daddr->sin_port));
err = -ENETUNREACH;
goto err_out;
}
@@ -537,9 +580,12 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
csk->port_id = port;
csk->mtu = mtu;
csk->dst = dst;
+
+ csk->csk_family = AF_INET;
csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
csk->daddr.sin_port = daddr->sin_port;
csk->daddr.sin_family = daddr->sin_family;
+ csk->saddr.sin_family = daddr->sin_family;
csk->saddr.sin_addr.s_addr = fl4.saddr;
neigh_release(n);
@@ -556,6 +602,121 @@ err_out:
return ERR_PTR(err);
}
+static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
+ const struct in6_addr *daddr)
+{
+ struct flowi6 fl;
+
+ if (saddr)
+ memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
+ if (daddr)
+ memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
+ return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
+}
+
+static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
+{
+ struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
+ struct dst_entry *dst;
+ struct net_device *ndev;
+ struct cxgbi_device *cdev;
+ struct rt6_info *rt = NULL;
+ struct neighbour *n;
+ struct in6_addr pref_saddr;
+ struct cxgbi_sock *csk = NULL;
+ unsigned int mtu = 0;
+ int port = 0xFFFF;
+ int err = 0;
+
+ rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
+
+ if (!rt) {
+ pr_info("no route to ipv6 %pI6 port %u\n",
+ daddr6->sin6_addr.s6_addr,
+ be16_to_cpu(daddr6->sin6_port));
+ err = -ENETUNREACH;
+ goto err_out;
+ }
+
+ dst = &rt->dst;
+
+ n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
+
+ if (!n) {
+ pr_info("%pI6, port %u, dst no neighbour.\n",
+ daddr6->sin6_addr.s6_addr,
+ be16_to_cpu(daddr6->sin6_port));
+ err = -ENETUNREACH;
+ goto rel_rt;
+ }
+ ndev = n->dev;
+
+ if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
+ pr_info("multi-cast route %pI6 port %u, dev %s.\n",
+ daddr6->sin6_addr.s6_addr,
+ ntohs(daddr6->sin6_port), ndev->name);
+ err = -ENETUNREACH;
+ goto rel_rt;
+ }
+
+ cdev = cxgbi_device_find_by_netdev(ndev, &port);
+ if (!cdev)
+ cdev = cxgbi_device_find_by_mac(ndev, &port);
+ if (!cdev) {
+ pr_info("dst %pI6 %s, NOT cxgbi device.\n",
+ daddr6->sin6_addr.s6_addr, ndev->name);
+ err = -ENETUNREACH;
+ goto rel_rt;
+ }
+ log_debug(1 << CXGBI_DBG_SOCK,
+ "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
+ daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
+ ndev->name, cdev);
+
+ csk = cxgbi_sock_create(cdev);
+ if (!csk) {
+ err = -ENOMEM;
+ goto rel_rt;
+ }
+ csk->cdev = cdev;
+ csk->port_id = port;
+ csk->mtu = mtu;
+ csk->dst = dst;
+
+ if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
+ struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
+
+ err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
+ &daddr6->sin6_addr, 0, &pref_saddr);
+ if (err) {
+ pr_info("failed to get source address to reach %pI6\n",
+ &daddr6->sin6_addr);
+ goto rel_rt;
+ }
+ } else {
+ pref_saddr = rt->rt6i_prefsrc.addr;
+ }
+
+ csk->csk_family = AF_INET6;
+ csk->daddr6.sin6_addr = daddr6->sin6_addr;
+ csk->daddr6.sin6_port = daddr6->sin6_port;
+ csk->daddr6.sin6_family = daddr6->sin6_family;
+ csk->saddr6.sin6_addr = pref_saddr;
+
+ neigh_release(n);
+ return csk;
+
+rel_rt:
+ if (n)
+ neigh_release(n);
+
+ ip6_rt_put(rt);
+ if (csk)
+ cxgbi_sock_closed(csk);
+err_out:
+ return ERR_PTR(err);
+}
+
void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
unsigned int opt)
{
@@ -2194,6 +2355,34 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
}
EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
+static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
+{
+ int len;
+
+ cxgbi_sock_get(csk);
+ len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
+ cxgbi_sock_put(csk);
+
+ return len;
+}
+
+static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
+{
+ int len;
+
+ cxgbi_sock_get(csk);
+ if (csk->csk_family == AF_INET)
+ len = sprintf(buf, "%pI4",
+ &csk->daddr.sin_addr.s_addr);
+ else
+ len = sprintf(buf, "%pI6",
+ &csk->daddr6.sin6_addr);
+
+ cxgbi_sock_put(csk);
+
+ return len;
+}
+
int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
char *buf)
{
@@ -2447,7 +2636,17 @@ struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
}
}
- csk = cxgbi_check_route(dst_addr);
+ if (dst_addr->sa_family == AF_INET) {
+ csk = cxgbi_check_route(dst_addr);
+ } else if (dst_addr->sa_family == AF_INET6) {
+ csk = cxgbi_check_route6(dst_addr);
+ } else {
+ pr_info("address family 0x%x NOT supported.\n",
+ dst_addr->sa_family);
+ err = -EAFNOSUPPORT;
+ return (struct iscsi_endpoint *)ERR_PTR(err);
+ }
+
if (IS_ERR(csk))
return (struct iscsi_endpoint *)csk;
cxgbi_sock_get(csk);
diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h
index 8135f04671af..8ad73d913f02 100644
--- a/drivers/scsi/cxgbi/libcxgbi.h
+++ b/drivers/scsi/cxgbi/libcxgbi.h
@@ -44,6 +44,15 @@ enum cxgbi_dbg_flag {
pr_info(fmt, ##__VA_ARGS__); \
} while (0)
+#define pr_info_ipaddr(fmt_trail, \
+ addr1, addr2, args_trail...) \
+do { \
+ if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \
+ break; \
+ pr_info("%pISpc - %pISpc, " fmt_trail, \
+ addr1, addr2, args_trail); \
+} while (0)
+
/* max. connections per adapter */
#define CXGBI_MAX_CONN 16384
@@ -202,8 +211,15 @@ struct cxgbi_sock {
spinlock_t lock;
struct kref refcnt;
unsigned int state;
- struct sockaddr_in saddr;
- struct sockaddr_in daddr;
+ unsigned int csk_family;
+ union {
+ struct sockaddr_in saddr;
+ struct sockaddr_in6 saddr6;
+ };
+ union {
+ struct sockaddr_in daddr;
+ struct sockaddr_in6 daddr6;
+ };
struct dst_entry *dst;
struct sk_buff_head receive_queue;
struct sk_buff_head write_queue;
@@ -692,6 +708,7 @@ struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
void cxgbi_device_unregister(struct cxgbi_device *);
void cxgbi_device_unregister_all(unsigned int flag);
struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
+struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int,
struct scsi_host_template *,
struct scsi_transport_template *);
--
2.0.1
--
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