scsi: be2iscsi: Check all zeroes IP before issuing IOCTL

Redefine FW IP types.
Before issuing IOCTL to clear IP, check if IP is all zeroes.
All zeroes IP implies IP is not set in FW so FW fails that IOCTL.

Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

5 files changed, 69 insertions, 47 deletions

diff --git a/drivers/scsi/be2iscsi/be_cmds.h b/drivers/scsi/be2iscsi/be_cmds.h
index deeb951..a4bc83c 100644
--- a/drivers/scsi/be2iscsi/be_cmds.h
+++ b/drivers/scsi/be2iscsi/be_cmds.h
@@ -365,6 +365,14 @@ struct ip_addr_format {
 	u16 size_of_structure;
 	u8 reserved;
 	u8 ip_type;
+#define BEISCSI_IP_TYPE_V4		0x1
+#define BEISCSI_IP_TYPE_STATIC_V4	0x3
+#define BEISCSI_IP_TYPE_DHCP_V4		0x5
+/* type v4 values < type v6 values */
+#define BEISCSI_IP_TYPE_V6		0x10
+#define BEISCSI_IP_TYPE_ROUTABLE_V6	0x30
+#define BEISCSI_IP_TYPE_LINK_LOCAL_V6	0x50
+#define BEISCSI_IP_TYPE_AUTO_V6		0x90
 	u8 addr[16];
 	u32 rsvd0;
 } __packed;
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index fa415c4..faa37f6 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -279,12 +279,12 @@ void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 {
 	struct be_cmd_get_if_info_resp *if_info;
 
-	if (!beiscsi_if_get_info(phba, BE2_IPV4, &if_info)) {
+	if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 		beiscsi_iface_create_ipv4(phba);
 		kfree(if_info);
 	}
 
-	if (!beiscsi_if_get_info(phba, BE2_IPV6, &if_info)) {
+	if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 		beiscsi_iface_create_ipv6(phba);
 		kfree(if_info);
 	}
@@ -358,14 +358,15 @@ beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 		break;
 	case ISCSI_NET_PARAM_IPV4_GW:
 		gw = info->value;
-		ret = beiscsi_if_set_gw(phba, BE2_IPV4, gw);
+		ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 		break;
 	case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 		if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
-			ret = beiscsi_if_en_dhcp(phba, BE2_IPV4);
+			ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 		else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 			/* release DHCP IP address */
-			ret = beiscsi_if_en_static(phba, BE2_IPV4, NULL, NULL);
+			ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
+						   NULL, NULL);
 		else
 			beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 				    "BS_%d : Invalid BOOTPROTO: %d\n",
@@ -378,7 +379,8 @@ beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 			info = nla_data(nla);
 			subnet = info->value;
 		}
-		ret = beiscsi_if_en_static(phba, BE2_IPV4, ip, subnet);
+		ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
+					   ip, subnet);
 		break;
 	case ISCSI_NET_PARAM_IPV4_SUBNET:
 		/*
@@ -391,7 +393,8 @@ beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 			info = nla_data(nla);
 			ip = info->value;
 		}
-		ret = beiscsi_if_en_static(phba, BE2_IPV4, ip, subnet);
+		ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
+					   ip, subnet);
 		break;
 	}
 
@@ -416,7 +419,7 @@ beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 		}
 		break;
 	case ISCSI_NET_PARAM_IPV6_ADDR:
-		ret = beiscsi_if_en_static(phba, BE2_IPV6,
+		ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 					   iface_param->value, NULL);
 		break;
 	}
@@ -511,10 +514,10 @@ static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 				     int param, char *buf)
 {
 	struct be_cmd_get_if_info_resp *if_info;
-	int len, ip_type = BE2_IPV4;
+	int len, ip_type = BEISCSI_IP_TYPE_V4;
 
 	if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
-		ip_type = BE2_IPV6;
+		ip_type = BEISCSI_IP_TYPE_V6;
 
 	len = beiscsi_if_get_info(phba, ip_type, &if_info);
 	if (len)
@@ -602,7 +605,7 @@ int beiscsi_iface_get_param(struct iscsi_iface *iface,
 		break;
 	case ISCSI_NET_PARAM_IPV4_GW:
 		memset(&gateway, 0, sizeof(gateway));
-		len = beiscsi_if_get_gw(phba, BE2_IPV4, &gateway);
+		len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 		if (!len)
 			len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 		break;
@@ -635,7 +638,7 @@ int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 		len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 		break;
 	case ISCSI_PARAM_CONN_ADDRESS:
-		if (beiscsi_ep->ip_type == BE2_IPV4)
+		if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 			len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 		else
 			len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
diff --git a/drivers/scsi/be2iscsi/be_iscsi.h b/drivers/scsi/be2iscsi/be_iscsi.h
index 5928ba9..0089e67 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.h
+++ b/drivers/scsi/be2iscsi/be_iscsi.h
@@ -23,13 +23,6 @@
 #include "be_main.h"
 #include "be_mgmt.h"
 
-#define BE2_IPV4  0x1
-#define BE2_IPV6  0x10
-#define BE2_DHCP_V4 0x05
-
-#define NON_BLOCKING 0x0
-#define BLOCKING 0x1
-
 void beiscsi_iface_create_default(struct beiscsi_hba *phba);
 
 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba);
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 71c91314..0fbb80d 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -389,7 +389,7 @@ static ssize_t beiscsi_show_boot_tgt_info(void *data, int type, char *buf)
 			    (char *)&boot_sess->target_name);
 		break;
 	case ISCSI_BOOT_TGT_IP_ADDR:
-		if (boot_conn->dest_ipaddr.ip_type == 0x1)
+		if (boot_conn->dest_ipaddr.ip_type == BEISCSI_IP_TYPE_V4)
 			rc = sprintf(buf, "%pI4\n",
 				(char *)&boot_conn->dest_ipaddr.addr);
 		else
diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index 8d05add..8069ef0 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -844,7 +844,7 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
 			   nonemb_cmd->size);
 	if (dst_addr->sa_family == PF_INET) {
 		__be32 s_addr = daddr_in->sin_addr.s_addr;
-		req->ip_address.ip_type = BE2_IPV4;
+		req->ip_address.ip_type = BEISCSI_IP_TYPE_V4;
 		req->ip_address.addr[0] = s_addr & 0x000000ff;
 		req->ip_address.addr[1] = (s_addr & 0x0000ff00) >> 8;
 		req->ip_address.addr[2] = (s_addr & 0x00ff0000) >> 16;
@@ -852,17 +852,17 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
 		req->tcp_port = ntohs(daddr_in->sin_port);
 		beiscsi_ep->dst_addr = daddr_in->sin_addr.s_addr;
 		beiscsi_ep->dst_tcpport = ntohs(daddr_in->sin_port);
-		beiscsi_ep->ip_type = BE2_IPV4;
+		beiscsi_ep->ip_type = BEISCSI_IP_TYPE_V4;
 	} else {
 		/* else its PF_INET6 family */
-		req->ip_address.ip_type = BE2_IPV6;
+		req->ip_address.ip_type = BEISCSI_IP_TYPE_V6;
 		memcpy(&req->ip_address.addr,
 		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
 		req->tcp_port = ntohs(daddr_in6->sin6_port);
 		beiscsi_ep->dst_tcpport = ntohs(daddr_in6->sin6_port);
 		memcpy(&beiscsi_ep->dst6_addr,
 		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
-		beiscsi_ep->ip_type = BE2_IPV6;
+		beiscsi_ep->ip_type = BEISCSI_IP_TYPE_V6;
 	}
 	req->cid = cid;
 	i = phba->nxt_cqid++;
@@ -1008,6 +1008,16 @@ unsigned int beiscsi_if_get_handle(struct beiscsi_hba *phba)
 	return status;
 }
 
+static inline bool beiscsi_if_zero_ip(u8 *ip, u32 ip_type)
+{
+	u32 len;
+
+	len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
+	while (len && !ip[len - 1])
+		len--;
+	return (len == 0);
+}
+
 static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
 			     u32 action, u32 ip_type, u8 *gw)
 {
@@ -1025,7 +1035,7 @@ static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
 	req->action = action;
 	req->ip_addr.ip_type = ip_type;
 	memcpy(req->ip_addr.addr, gw,
-	       (ip_type == BE2_IPV4) ? IP_V4_LEN : IP_V6_LEN);
+	       (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN);
 	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
 }
 
@@ -1042,12 +1052,14 @@ int beiscsi_if_set_gw(struct beiscsi_hba *phba, u32 ip_type, u8 *gw)
 		return rt_val;
 	}
 
-	rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_DEL, ip_type,
-				   gw_resp.ip_addr.addr);
-	if (rt_val) {
-		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
-				"BG_%d : Failed to clear Gateway Addr Set\n");
-		return rt_val;
+	if (!beiscsi_if_zero_ip(gw_resp.ip_addr.addr, ip_type)) {
+		rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_DEL, ip_type,
+					   gw_resp.ip_addr.addr);
+		if (rt_val) {
+			beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
+				    "BG_%d : Failed to clear Gateway Addr Set\n");
+			return rt_val;
+		}
 	}
 
 	rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_ADD, ip_type, gw);
@@ -1138,7 +1150,7 @@ beiscsi_if_set_ip(struct beiscsi_hba *phba, u8 *ip,
 	req->ip_params.ip_record.ip_addr.size_of_structure =
 		sizeof(struct be_ip_addr_subnet_format);
 	req->ip_params.ip_record.ip_addr.ip_type = ip_type;
-	ip_len = ip_type == BE2_IPV4 ? IP_V4_LEN : IP_V6_LEN;
+	ip_len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
 	memcpy(req->ip_params.ip_record.ip_addr.addr, ip, ip_len);
 	if (subnet)
 		memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
@@ -1190,10 +1202,12 @@ int beiscsi_if_en_static(struct beiscsi_hba *phba, u32 ip_type,
 		}
 	}
 
-	/* first delete any old IP set */
-	rc = beiscsi_if_clr_ip(phba, if_info);
-	if (rc)
-		goto exit;
+	/* first delete any IP set */
+	if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
+		rc = beiscsi_if_clr_ip(phba, if_info);
+		if (rc)
+			goto exit;
+	}
 
 	/* if ip == NULL then this is called just to release DHCP IP */
 	if (ip)
@@ -1222,10 +1236,12 @@ int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
 		goto exit;
 	}
 
-	/* first delete any old static IP set */
-	rc = beiscsi_if_clr_ip(phba, if_info);
-	if (rc)
-		goto exit;
+	/* first delete any IP set */
+	if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
+		rc = beiscsi_if_clr_ip(phba, if_info);
+		if (rc)
+			goto exit;
+	}
 
 	/* delete gateway settings if mode change is to DHCP */
 	memset(&gw_resp, 0, sizeof(gw_resp));
@@ -1237,12 +1253,14 @@ int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
 		goto exit;
 	}
 	gw = (u8 *)&gw_resp.ip_addr.addr;
-	rc = beiscsi_if_mod_gw(phba, IP_ACTION_DEL,
-			       if_info->ip_addr.ip_type, gw);
-	if (rc) {
-		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
-				"BG_%d : Failed to clear Gateway Addr Set\n");
-		goto exit;
+	if (!beiscsi_if_zero_ip(gw, if_info->ip_addr.ip_type)) {
+		rc = beiscsi_if_mod_gw(phba, IP_ACTION_DEL,
+				       if_info->ip_addr.ip_type, gw);
+		if (rc) {
+			beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
+				    "BG_%d : Failed to clear Gateway Addr Set\n");
+			goto exit;
+		}
 	}
 
 	rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
@@ -1252,7 +1270,7 @@ int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
 		goto exit;
 
 	dhcpreq = nonemb_cmd.va;
-	dhcpreq->flags = BLOCKING;
+	dhcpreq->flags = 1; /* 1 - blocking; 0 - non-blocking */
 	dhcpreq->retry_count = 1;
 	dhcpreq->interface_hndl = phba->interface_handle;
 	dhcpreq->ip_type = ip_type;