libcxgb,iw_cxgb4,cxgbit: add cxgb_find_route6()

Add cxgb_find_route6() in libcxgb_cm.c to remove
it's duplicate definitions from cxgb4/cm.c and
cxgbit/cxgbit_cm.c.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 61 insertions, 97 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 02f5e20cd3a3..a08a74839c13 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -465,46 +465,6 @@ static struct net_device *get_real_dev(struct net_device *egress_dev)
         return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
 }
 
-static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
-{
-        int i;
-
-        egress_dev = get_real_dev(egress_dev);
-        for (i = 0; i < dev->rdev.lldi.nports; i++)
-                if (dev->rdev.lldi.ports[i] == egress_dev)
-                        return 1;
-        return 0;
-}
-
-static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
-                                     __u8 *peer_ip, __be16 local_port,
-                                     __be16 peer_port, u8 tos,
-                                     __u32 sin6_scope_id)
-{
-        struct dst_entry *dst = NULL;
-
-        if (IS_ENABLED(CONFIG_IPV6)) {
-                struct flowi6 fl6;
-
-                memset(&fl6, 0, sizeof(fl6));
-                memcpy(&fl6.daddr, peer_ip, 16);
-                memcpy(&fl6.saddr, local_ip, 16);
-                if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
-                        fl6.flowi6_oif = sin6_scope_id;
-                dst = ip6_route_output(&init_net, NULL, &fl6);
-                if (!dst)
-                        goto out;
-                if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
-                    !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
-                        dst_release(dst);
-                        dst = NULL;
-                }
-        }
-
-out:
-        return dst;
-}
-
 static void arp_failure_discard(void *handle, struct sk_buff *skb)
 {
         pr_err(MOD "ARP failure\n");
@@ -2197,10 +2157,13 @@ static int c4iw_reconnect(struct c4iw_ep *ep)
                 iptype = 4;
                 ra = (__u8 *)&raddr->sin_addr;
         } else {
-                ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
-                                      raddr6->sin6_addr.s6_addr,
-                                      laddr6->sin6_port, raddr6->sin6_port, 0,
-                                      raddr6->sin6_scope_id);
+                ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
+                                           get_real_dev,
+                                           laddr6->sin6_addr.s6_addr,
+                                           raddr6->sin6_addr.s6_addr,
+                                           laddr6->sin6_port,
+                                           raddr6->sin6_port, 0,
+                                           raddr6->sin6_scope_id);
                 iptype = 6;
                 ra = (__u8 *)&raddr6->sin6_addr;
         }
@@ -2540,10 +2503,11 @@ static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
                      , __func__, parent_ep, hwtid,
                      local_ip, peer_ip, ntohs(local_port),
                      ntohs(peer_port), peer_mss);
-                dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
-                                  PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
-                                  ((struct sockaddr_in6 *)
-                                  &parent_ep->com.local_addr)->sin6_scope_id);
+                dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
+                                local_ip, peer_ip, local_port, peer_port,
+                                PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
+                                ((struct sockaddr_in6 *)
+                                 &parent_ep->com.local_addr)->sin6_scope_id);
         }
         if (!dst) {
                 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
@@ -3339,10 +3303,12 @@ int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
                      __func__, laddr6->sin6_addr.s6_addr,
                      ntohs(laddr6->sin6_port),
                      raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
-                ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
-                                      raddr6->sin6_addr.s6_addr,
-                                      laddr6->sin6_port, raddr6->sin6_port, 0,
-                                      raddr6->sin6_scope_id);
+                ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
+                                           laddr6->sin6_addr.s6_addr,
+                                           raddr6->sin6_addr.s6_addr,
+                                           laddr6->sin6_port,
+                                           raddr6->sin6_port, 0,
+                                           raddr6->sin6_scope_id);
         }
         if (!ep->dst) {
                 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c
index a31841247954..0f0de5b63622 100644
--- a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c
+++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c
@@ -33,6 +33,7 @@
 #include <linux/tcp.h>
 #include <linux/ipv6.h>
 #include <net/route.h>
+#include <net/ip6_route.h>
 
 #include "libcxgb_cm.h"
 
@@ -114,3 +115,35 @@ cxgb_find_route(struct cxgb4_lld_info *lldi,
         return &rt->dst;
 }
 EXPORT_SYMBOL(cxgb_find_route);
+
+struct dst_entry *
+cxgb_find_route6(struct cxgb4_lld_info *lldi,
+                 struct net_device *(*get_real_dev)(struct net_device *),
+                 __u8 *local_ip, __u8 *peer_ip, __be16 local_port,
+                 __be16 peer_port, u8 tos, __u32 sin6_scope_id)
+{
+        struct dst_entry *dst = NULL;
+
+        if (IS_ENABLED(CONFIG_IPV6)) {
+                struct flowi6 fl6;
+
+                memset(&fl6, 0, sizeof(fl6));
+                memcpy(&fl6.daddr, peer_ip, 16);
+                memcpy(&fl6.saddr, local_ip, 16);
+                if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
+                        fl6.flowi6_oif = sin6_scope_id;
+                dst = ip6_route_output(&init_net, NULL, &fl6);
+                if (!dst)
+                        goto out;
+                if (!cxgb_our_interface(lldi, get_real_dev,
+                                        ip6_dst_idev(dst)->dev) &&
+                    !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
+                        dst_release(dst);
+                        dst = NULL;
+                }
+        }
+
+out:
+        return dst;
+}
+EXPORT_SYMBOL(cxgb_find_route6);
diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h
index fe69161288e5..c4df04a4a323 100644
--- a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h
+++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h
@@ -43,4 +43,8 @@ struct dst_entry *
 cxgb_find_route(struct cxgb4_lld_info *,
                 struct net_device *(*)(struct net_device *),
                 __be32, __be32, __be16, __be16, u8);
+struct dst_entry *
+cxgb_find_route6(struct cxgb4_lld_info *,
+                 struct net_device *(*)(struct net_device *),
+                 __u8 *, __u8 *, __be16, __be16, u8, __u32);
 #endif
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_cm.c b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
index 49b24b93ab12..e961ac4bf5db 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_cm.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
@@ -790,46 +790,6 @@ void _cxgbit_free_csk(struct kref *kref)
         kfree(csk);
 }
 
-static int
-cxgbit_our_interface(struct cxgbit_device *cdev, struct net_device *egress_dev)
-{
-        u8 i;
-
-        egress_dev = cxgbit_get_real_dev(egress_dev);
-        for (i = 0; i < cdev->lldi.nports; i++)
-                if (cdev->lldi.ports[i] == egress_dev)
-                        return 1;
-        return 0;
-}
-
-static struct dst_entry *
-cxgbit_find_route6(struct cxgbit_device *cdev, __u8 *local_ip, __u8 *peer_ip,
-                   __be16 local_port, __be16 peer_port, u8 tos,
-                   __u32 sin6_scope_id)
-{
-        struct dst_entry *dst = NULL;
-
-        if (IS_ENABLED(CONFIG_IPV6)) {
-                struct flowi6 fl6;
-
-                memset(&fl6, 0, sizeof(fl6));
-                memcpy(&fl6.daddr, peer_ip, 16);
-                memcpy(&fl6.saddr, local_ip, 16);
-                if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
-                        fl6.flowi6_oif = sin6_scope_id;
-                dst = ip6_route_output(&init_net, NULL, &fl6);
-                if (!dst)
-                        goto out;
-                if (!cxgbit_our_interface(cdev, ip6_dst_idev(dst)->dev) &&
-                    !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
-                        dst_release(dst);
-                        dst = NULL;
-                }
-        }
-out:
-        return dst;
-}
-
 static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi)
 {
         unsigned int linkspeed;
@@ -1299,11 +1259,12 @@ cxgbit_pass_accept_req(struct cxgbit_device *cdev, struct sk_buff *skb)
                          , __func__, cnp, tid,
                          local_ip, peer_ip, ntohs(local_port),
                          ntohs(peer_port), peer_mss);
-                dst = cxgbit_find_route6(cdev, local_ip, peer_ip,
-                                         local_port, peer_port,
-                                         PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
-                                         ((struct sockaddr_in6 *)
-                                         &cnp->com.local_addr)->sin6_scope_id);
+                dst = cxgb_find_route6(&cdev->lldi, cxgbit_get_real_dev,
+                                       local_ip, peer_ip,
+                                       local_port, peer_port,
+                                       PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
+                                       ((struct sockaddr_in6 *)
+                                        &cnp->com.local_addr)->sin6_scope_id);
         }
         if (!dst) {
                 pr_err("%s - failed to find dst entry!\n",