[PATCH net-next v2 0/4] cxgb4i: Add ipv6 support

[PATCH net-next v2 0/4] cxgb4i: Add ipv6 support

[Anish Bhatt]

Hi,
   The following patchset add ipv6 support for the cxgb4i(iscsi) driver.

Patch 1 moves a define from the iw_cxgb4 to cxgb4 to prevent code duplication,
 as it is used by cxgb4i and iw_cxgb4 both.
Patch 2 exports symbols needed by cxgb4i for ipv6 support from cxgb4.
Patch 3 & 4 deal with actual ipv6 code in libcxgbi/cxgb4i.

Submitting to net-next as changes were needed in cxgb4/iw_cxgb4, and submitting
to scsi separately would break compilation, cc-ing scsi & rdma.

-Anish

v2 : Cleanup macro that prints ip addresses by using %pIS in patch 3

Anish Bhatt (4):
  cxgb4/iw_cxgb4: Move common defines to cxgb4
  cxgb4: Export symbols required by cxgb4i for ipv6 support and required
    defines
  libcxgbi: Add ipv6 api to driver
  cxgb4i: Add ipv6 code to driver, call into libcxgbi ipv6 api

 drivers/infiniband/hw/cxgb4/t4fw_ri_api.h       |   1 -
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |  10 +-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h  |   4 +
 drivers/net/ethernet/chelsio/cxgb4/t4_msg.h     |   3 +
 drivers/scsi/cxgbi/cxgb4i/cxgb4i.c              | 353 +++++++++++++++++++++---
 drivers/scsi/cxgbi/libcxgbi.c                   | 237 ++++++++++++++--
 drivers/scsi/cxgbi/libcxgbi.h                   |  21 +-
 7 files changed, 564 insertions(+), 65 deletions(-)

-- 
2.0.1

[PATCH net-next v2 2/4] cxgb4: Export symbols required by cxgb4i for ipv6 support and required defines

[Anish Bhatt]

Signed-off-by: Anish Bhatt <anish@chelsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 10 ++++++----
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h  |  4 ++++
 drivers/net/ethernet/chelsio/cxgb4/t4_msg.h     |  2 ++
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 9c7e4f0a7683..8b46534b06c1 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3445,8 +3445,8 @@ static int tid_init(struct tid_info *t)
 	return 0;
 }
 
-static int cxgb4_clip_get(const struct net_device *dev,
-			  const struct in6_addr *lip)
+int cxgb4_clip_get(const struct net_device *dev,
+		   const struct in6_addr *lip)
 {
 	struct adapter *adap;
 	struct fw_clip_cmd c;
@@ -3460,9 +3460,10 @@ static int cxgb4_clip_get(const struct net_device *dev,
 	c.ip_lo = *(__be64 *)(lip->s6_addr + 8);
 	return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
 }
+EXPORT_SYMBOL(cxgb4_clip_get);
 
-static int cxgb4_clip_release(const struct net_device *dev,
-			      const struct in6_addr *lip)
+int cxgb4_clip_release(const struct net_device *dev,
+		       const struct in6_addr *lip)
 {
 	struct adapter *adap;
 	struct fw_clip_cmd c;
@@ -3476,6 +3477,7 @@ static int cxgb4_clip_release(const struct net_device *dev,
 	c.ip_lo = *(__be64 *)(lip->s6_addr + 8);
 	return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
 }
+EXPORT_SYMBOL(cxgb4_clip_release);
 
 /**
  *	cxgb4_create_server - create an IP server
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
index 79a84de1d204..1366ba620c87 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
@@ -172,6 +172,10 @@ int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
 			       unsigned char port, unsigned char mask);
 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
 			       unsigned int queue, bool ipv6);
+int cxgb4_clip_get(const struct net_device *dev, const struct in6_addr *lip);
+int cxgb4_clip_release(const struct net_device *dev,
+		       const struct in6_addr *lip);
+
 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
 {
 	skb_set_queue_mapping(skb, (queue << 1) | prio);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
index 64006327df83..0259feeab1b3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
@@ -270,6 +270,8 @@ struct cpl_pass_accept_rpl {
 #define RX_COALESCE_VALID(x) ((x) << 11)
 #define RX_COALESCE(x)       ((x) << 12)
 #define PACE(x)	      ((x) << 16)
+#define RX_FC_VALID	     ((1U) << 19)
+#define RX_FC_DISABLE	     ((1U) << 20)
 #define TX_QUEUE(x)          ((x) << 23)
 #define RX_CHANNEL(x)        ((x) << 26)
 #define CCTRL_ECN(x)         ((x) << 27)
-- 
2.0.1

[PATCH net-next v2 3/4] libcxgbi: Add ipv6 api to driver

[Anish Bhatt]

Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: Manoj Malviya <manojmalviya@chelsio.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

[PATCH net-next v2 1/4] cxgb4/iw_cxgb4: Move common defines to cxgb4

[Anish Bhatt]

This define is used by cxgb4i and iw_cxgb4, moving to avoid code duplication

Signed-off-by: Anish Bhatt <anish-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Acked-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
---
 drivers/infiniband/hw/cxgb4/t4fw_ri_api.h   | 1 -
 drivers/net/ethernet/chelsio/cxgb4/t4_msg.h | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h b/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h
index 91289a051af9..5709e77faf7c 100644
--- a/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h
+++ b/drivers/infiniband/hw/cxgb4/t4fw_ri_api.h
@@ -849,6 +849,5 @@ enum {                     /* TCP congestion control algorithms */
 #define G_CONG_CNTRL(x) (((x) >> S_CONG_CNTRL) & M_CONG_CNTRL)
 
 #define CONG_CNTRL_VALID   (1 << 18)
-#define T5_OPT_2_VALID       (1 << 31)
 
 #endif /* _T4FW_RI_API_H_ */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
index abb45809c0c8..64006327df83 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
@@ -276,6 +276,7 @@ struct cpl_pass_accept_rpl {
 #define WND_SCALE_EN(x)      ((x) << 28)
 #define TSTAMPS_EN(x)        ((x) << 29)
 #define SACK_EN(x)           ((x) << 30)
+#define T5_OPT_2_VALID	     ((1U) << 31)
 	__be64 opt0;
 };
 
-- 
2.0.1

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[PATCH net-next v2 4/4] cxgb4i: Add ipv6 code to driver, call into libcxgbi ipv6 api

[Anish Bhatt]

Signed-off-by: Anish Bhatt <anish-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Karen Xie <kxie-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Manoj Malviya <manojmalviya-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
---
 drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 353 +++++++++++++++++++++++++++++++++----
 1 file changed, 314 insertions(+), 39 deletions(-)

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index e8ee5e5fe0ef..1041574edcfc 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -19,6 +19,7 @@
 #include <net/tcp.h>
 #include <net/dst.h>
 #include <linux/netdevice.h>
+#include <net/addrconf.h>
 
 #include "t4_regs.h"
 #include "t4_msg.h"
@@ -150,6 +151,7 @@ static struct scsi_transport_template *cxgb4i_stt;
  * The section below implments CPLs that related to iscsi tcp connection
  * open/close/abort and data send/receive.
  */
+
 #define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
 #define RCV_BUFSIZ_MASK		0x3FFU
 #define MAX_IMM_TX_PKT_LEN	128
@@ -179,6 +181,7 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 				struct l2t_entry *e)
 {
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	int t4 = is_t4(lldi->adapter_type);
 	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 	unsigned long long opt0;
 	unsigned int opt2;
@@ -248,6 +251,97 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 	}
 
 	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
+
+	pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
+		       (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
+		       csk->state, csk->flags, csk->atid, csk->rss_qid);
+
+	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
+}
+
+static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
+			       struct l2t_entry *e)
+{
+	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	int t4 = is_t4(lldi->adapter_type);
+	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
+	unsigned long long opt0;
+	unsigned int opt2;
+	unsigned int qid_atid = ((unsigned int)csk->atid) |
+				 (((unsigned int)csk->rss_qid) << 14);
+
+	opt0 = KEEP_ALIVE(1) |
+		WND_SCALE(wscale) |
+		MSS_IDX(csk->mss_idx) |
+		L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
+		TX_CHAN(csk->tx_chan) |
+		SMAC_SEL(csk->smac_idx) |
+		ULP_MODE(ULP_MODE_ISCSI) |
+		RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
+
+	opt2 = RX_CHANNEL(0) |
+		RSS_QUEUE_VALID |
+		RX_FC_DISABLE |
+		RSS_QUEUE(csk->rss_qid);
+
+	if (t4) {
+		struct cpl_act_open_req6 *req =
+			    (struct cpl_act_open_req6 *)skb->head;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+							    qid_atid));
+		req->local_port = csk->saddr6.sin6_port;
+		req->peer_port = csk->daddr6.sin6_port;
+
+		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
+		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
+								    8);
+		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
+		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
+								    8);
+
+		req->opt0 = cpu_to_be64(opt0);
+
+		opt2 |= RX_FC_VALID;
+		req->opt2 = cpu_to_be32(opt2);
+
+		req->params = cpu_to_be32(cxgb4_select_ntuple(
+					  csk->cdev->ports[csk->port_id],
+					  csk->l2t));
+	} else {
+		struct cpl_t5_act_open_req6 *req =
+				(struct cpl_t5_act_open_req6 *)skb->head;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+							    qid_atid));
+		req->local_port = csk->saddr6.sin6_port;
+		req->peer_port = csk->daddr6.sin6_port;
+		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
+		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
+									8);
+		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
+		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
+									8);
+		req->opt0 = cpu_to_be64(opt0);
+
+		opt2 |= T5_OPT_2_VALID;
+		req->opt2 = cpu_to_be32(opt2);
+
+		req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
+					  csk->cdev->ports[csk->port_id],
+					  csk->l2t)));
+	}
+
+	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
+
+	pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
+		t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
+		&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
+		&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
+		csk->rss_qid);
+
 	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 }
 
@@ -586,9 +680,11 @@ static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
-		csk, csk->state, csk->flags, tid, atid, rcv_isn);
+	pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       atid, tid, csk, csk->state, csk->flags, rcv_isn);
+
+	module_put(THIS_MODULE);
 
 	cxgbi_sock_get(csk);
 	csk->tid = tid;
@@ -663,6 +759,9 @@ static void csk_act_open_retry_timer(unsigned long data)
 	struct sk_buff *skb;
 	struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
+				   struct l2t_entry *);
+	int t4 = is_t4(lldi->adapter_type), size, size6;
 
 	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 		"csk 0x%p,%u,0x%lx,%u.\n",
@@ -670,20 +769,35 @@ static void csk_act_open_retry_timer(unsigned long data)
 
 	cxgbi_sock_get(csk);
 	spin_lock_bh(&csk->lock);
-	skb = alloc_wr(is_t4(lldi->adapter_type) ?
-				sizeof(struct cpl_act_open_req) :
-				sizeof(struct cpl_t5_act_open_req),
-			0, GFP_ATOMIC);
+
+	if (t4) {
+		size = sizeof(struct cpl_act_open_req);
+		size6 = sizeof(struct cpl_act_open_req6);
+	} else {
+		size = sizeof(struct cpl_t5_act_open_req);
+		size6 = sizeof(struct cpl_t5_act_open_req6);
+	}
+
+	if (csk->csk_family == AF_INET) {
+		send_act_open_func = send_act_open_req;
+		skb = alloc_wr(size, 0, GFP_ATOMIC);
+	} else {
+		send_act_open_func = send_act_open_req6;
+		skb = alloc_wr(size6, 0, GFP_ATOMIC);
+	}
+
 	if (!skb)
 		cxgbi_sock_fail_act_open(csk, -ENOMEM);
 	else {
 		skb->sk = (struct sock *)csk;
 		t4_set_arp_err_handler(skb, csk,
-					cxgbi_sock_act_open_req_arp_failure);
-		send_act_open_req(csk, skb, csk->l2t);
+				       cxgbi_sock_act_open_req_arp_failure);
+		send_act_open_func(csk, skb, csk->l2t);
 	}
+
 	spin_unlock_bh(&csk->lock);
 	cxgbi_sock_put(csk);
+
 }
 
 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
@@ -703,10 +817,9 @@ static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
-		&csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
-		&csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
-		atid, tid, status, csk, csk->state, csk->flags);
+	pr_info_ipaddr("tid %u/%u, status %u.\n"
+		       "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
+		       atid, tid, status, csk, csk->state, csk->flags);
 
 	if (status == CPL_ERR_RTX_NEG_ADVICE)
 		goto rel_skb;
@@ -746,9 +859,9 @@ static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
 		pr_err("can't find connection for tid %u.\n", tid);
 		goto rel_skb;
 	}
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx,%u.\n",
-		csk, csk->state, csk->flags, csk->tid);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid);
 	cxgbi_sock_rcv_peer_close(csk);
 rel_skb:
 	__kfree_skb(skb);
@@ -767,9 +880,9 @@ static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 		pr_err("can't find connection for tid %u.\n", tid);
 		goto rel_skb;
 	}
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx,%u.\n",
-		csk, csk->state, csk->flags, csk->tid);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid);
 	cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
 rel_skb:
 	__kfree_skb(skb);
@@ -808,9 +921,9 @@ static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
-		csk, csk->state, csk->flags, csk->tid, req->status);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid, req->status);
 
 	if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 	    req->status == CPL_ERR_PERSIST_NEG_ADVICE)
@@ -851,10 +964,10 @@ static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 	if (!csk)
 		goto rel_skb;
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
-		rpl->status, csk, csk ? csk->state : 0,
-		csk ? csk->flags : 0UL);
+	if (csk)
+		pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
+			       (&csk->saddr), (&csk->daddr), csk,
+			       csk->state, csk->flags, csk->tid, rpl->status);
 
 	if (rpl->status == CPL_ERR_ABORT_FAILED)
 		goto rel_skb;
@@ -1163,15 +1276,29 @@ static int init_act_open(struct cxgbi_sock *csk)
 	struct cxgbi_device *cdev = csk->cdev;
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 	struct net_device *ndev = cdev->ports[csk->port_id];
-	struct port_info *pi = netdev_priv(ndev);
 	struct sk_buff *skb = NULL;
-	struct neighbour *n;
+	struct neighbour *n = NULL;
+	void *daddr;
 	unsigned int step;
+	unsigned int size, size6;
+	int t4 = is_t4(lldi->adapter_type);
 
 	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 		"csk 0x%p,%u,0x%lx,%u.\n",
 		csk, csk->state, csk->flags, csk->tid);
 
+	if (csk->csk_family == AF_INET)
+		daddr = &csk->daddr.sin_addr.s_addr;
+	else
+		daddr = &csk->daddr6.sin6_addr;
+
+	n = dst_neigh_lookup(csk->dst, daddr);
+
+	if (!n) {
+		pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
+		goto rel_resource;
+	}
+
 	csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
 	if (csk->atid < 0) {
 		pr_err("%s, NO atid available.\n", ndev->name);
@@ -1192,10 +1319,19 @@ static int init_act_open(struct cxgbi_sock *csk)
 	}
 	cxgbi_sock_get(csk);
 
-	skb = alloc_wr(is_t4(lldi->adapter_type) ?
-				sizeof(struct cpl_act_open_req) :
-				sizeof(struct cpl_t5_act_open_req),
-			0, GFP_ATOMIC);
+	if (t4) {
+		size = sizeof(struct cpl_act_open_req);
+		size6 = sizeof(struct cpl_act_open_req6);
+	} else {
+		size = sizeof(struct cpl_t5_act_open_req);
+		size6 = sizeof(struct cpl_t5_act_open_req6);
+	}
+
+	if (csk->csk_family == AF_INET)
+		skb = alloc_wr(size, 0, GFP_NOIO);
+	else
+		skb = alloc_wr(size6, 0, GFP_NOIO);
+
 	if (!skb)
 		goto rel_resource;
 	skb->sk = (struct sock *)csk;
@@ -1211,19 +1347,27 @@ static int init_act_open(struct cxgbi_sock *csk)
 	csk->txq_idx = cxgb4_port_idx(ndev) * step;
 	step = lldi->nrxq / lldi->nchan;
 	csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
-	csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
+	csk->wr_cred = lldi->wr_cred -
+		       DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
+	csk->wr_max_cred = csk->wr_cred;
 	csk->wr_una_cred = 0;
 	cxgbi_sock_reset_wr_list(csk);
 	csk->err = 0;
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
-		csk, pi->port_id, ndev->name, csk->tx_chan,
-		csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
-		csk->smac_idx);
 
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
+		       (&csk->saddr), (&csk->daddr), csk, csk->state,
+		       csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
+		       csk->mtu, csk->mss_idx, csk->smac_idx);
+
+	/* must wait for either a act_open_rpl or act_open_establish */
+	try_module_get(THIS_MODULE);
 	cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
-	send_act_open_req(csk, skb, csk->l2t);
+	if (csk->csk_family == AF_INET)
+		send_act_open_req(csk, skb, csk->l2t);
+	else
+		send_act_open_req6(csk, skb, csk->l2t);
 	neigh_release(n);
+
 	return 0;
 
 rel_resource:
@@ -1487,6 +1631,131 @@ static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
 	return 0;
 }
 
+static int cxgbi_inet6addr_handler(struct notifier_block *this,
+				   unsigned long event, void *data)
+{
+	struct inet6_ifaddr *ifa = data;
+	struct net_device *event_dev = ifa->idev->dev;
+	struct cxgbi_device *cdev;
+	int ret = NOTIFY_DONE;
+
+	rcu_read_lock();
+
+	if (event_dev->priv_flags & IFF_802_1Q_VLAN)
+		event_dev = vlan_dev_real_dev(event_dev);
+
+	cdev = cxgbi_device_find_by_netdev(event_dev, NULL);
+	if (!cdev) {
+		rcu_read_unlock();
+		return ret;
+	}
+	switch (event) {
+	case NETDEV_UP:
+		ret = cxgb4_clip_get(event_dev,
+				     (const struct in6_addr *)
+				     ((ifa)->addr.s6_addr));
+		if (ret < 0) {
+			rcu_read_unlock();
+			return ret;
+		}
+		ret = NOTIFY_OK;
+		break;
+
+	case NETDEV_DOWN:
+		cxgb4_clip_release(event_dev,
+				   (const struct in6_addr *)
+				   ((ifa)->addr.s6_addr));
+		ret = NOTIFY_OK;
+		break;
+
+	default:
+		break;
+	}
+
+	rcu_read_unlock();
+	return ret;
+}
+
+static struct notifier_block cxgbi_inet6addr_notifier = {
+	.notifier_call = cxgbi_inet6addr_handler
+};
+
+/* Retrieve IPv6 addresses from a root device (bond, vlan) associated with
+ * a physical device.
+ * The physical device reference is needed to send the actual CLIP command.
+ */
+static int update_dev_clip(struct net_device *root_dev, struct net_device *dev)
+{
+	struct inet6_dev *idev = NULL;
+	struct inet6_ifaddr *ifa;
+	int ret = 0;
+
+	idev = __in6_dev_get(root_dev);
+	if (!idev)
+		return ret;
+
+	read_lock_bh(&idev->lock);
+	list_for_each_entry(ifa, &idev->addr_list, if_list) {
+		pr_info("updating the clip for addr %pI6\n",
+			ifa->addr.s6_addr);
+		ret = cxgb4_clip_get(dev, (const struct in6_addr *)
+				     ifa->addr.s6_addr);
+		if (ret < 0)
+			break;
+	}
+
+	read_unlock_bh(&idev->lock);
+	return ret;
+}
+
+static int update_root_dev_clip(struct net_device *dev)
+{
+	struct net_device *root_dev = NULL;
+	int i, ret = 0;
+
+	/* First populate the real net device's IPv6 address */
+	ret = update_dev_clip(dev, dev);
+	if (ret)
+		return ret;
+
+	/* Parse all bond and vlan devices layered on top of the physical dev */
+	root_dev = netdev_master_upper_dev_get(dev);
+	if (root_dev) {
+		ret = update_dev_clip(root_dev, dev);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < VLAN_N_VID; i++) {
+		root_dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), i);
+		if (!root_dev)
+			continue;
+
+		ret = update_dev_clip(root_dev, dev);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+static void cxgbi_update_clip(struct cxgbi_device *cdev)
+{
+	int i;
+
+	rcu_read_lock();
+
+	for (i = 0; i < cdev->nports; i++) {
+		struct net_device *dev = cdev->ports[i];
+		int ret = 0;
+
+		if (dev)
+			ret = update_root_dev_clip(dev);
+		if (ret < 0)
+			break;
+	}
+	rcu_read_unlock();
+}
+
 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
 {
 	struct cxgbi_device *cdev;
@@ -1605,6 +1874,7 @@ static int t4_uld_state_change(void *handle, enum cxgb4_state state)
 	switch (state) {
 	case CXGB4_STATE_UP:
 		pr_info("cdev 0x%p, UP.\n", cdev);
+		cxgbi_update_clip(cdev);
 		/* re-initialize */
 		break;
 	case CXGB4_STATE_START_RECOVERY:
@@ -1635,11 +1905,16 @@ static int __init cxgb4i_init_module(void)
 	if (rc < 0)
 		return rc;
 	cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
+
+	register_inet6addr_notifier(&cxgbi_inet6addr_notifier);
+
 	return 0;
 }
 
 static void __exit cxgb4i_exit_module(void)
 {
+	unregister_inet6addr_notifier(&cxgbi_inet6addr_notifier);
+
 	cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
 	cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
 	cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
-- 
2.0.1

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Re: [PATCH net-next v2 0/4] cxgb4i: Add ipv6 support

[David Miller]

From: Anish Bhatt <anish-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Date: Thu, 17 Jul 2014 00:18:14 -0700

>    The following patchset add ipv6 support for the cxgb4i(iscsi) driver.
> 
> Patch 1 moves a define from the iw_cxgb4 to cxgb4 to prevent code duplication,
>  as it is used by cxgb4i and iw_cxgb4 both.
> Patch 2 exports symbols needed by cxgb4i for ipv6 support from cxgb4.
> Patch 3 & 4 deal with actual ipv6 code in libcxgbi/cxgb4i.
> 
> Submitting to net-next as changes were needed in cxgb4/iw_cxgb4, and submitting
> to scsi separately would break compilation, cc-ing scsi & rdma.
> 
> v2 : Cleanup macro that prints ip addresses by using %pIS in patch 3

Series applied, thanks.
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