qeth: HiperSockets Network Traffic Analyzer

New feature to trace HiperSockets network traffic for debugging
purposes.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 files changed, 336 insertions, 86 deletions

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index b232693378cd..a3ac4456e0b1 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -649,6 +649,7 @@ struct qeth_card_options {
 	int performance_stats;
 	int rx_sg_cb;
 	enum qeth_ipa_isolation_modes isolation;
+	int sniffer;
 };
 
 /*
@@ -737,6 +738,7 @@ struct qeth_card {
 	struct qeth_discipline discipline;
 	atomic_t force_alloc_skb;
 	struct service_level qeth_service_level;
+	struct qdio_ssqd_desc ssqd;
 };
 
 struct qeth_card_list_struct {
@@ -811,7 +813,8 @@ int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *,
 			enum qeth_ipa_cmds, enum qeth_prot_versions);
 int qeth_query_setadapterparms(struct qeth_card *);
-int qeth_check_qdio_errors(struct qdio_buffer *, unsigned int, const char *);
+int qeth_check_qdio_errors(struct qeth_card *, struct qdio_buffer *,
+		unsigned int, const char *);
 void qeth_queue_input_buffer(struct qeth_card *, int);
 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
 		struct qdio_buffer *, struct qdio_buffer_element **, int *,
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index d34804d5ece1..2c8e9da8753f 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -269,6 +269,7 @@ int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 	card->qdio.init_pool.buf_count = bufcnt;
 	return qeth_alloc_buffer_pool(card);
 }
+EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 
 static int qeth_issue_next_read(struct qeth_card *card)
 {
@@ -350,8 +351,10 @@ static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 	if (IS_IPA(iob->data)) {
 		cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 		if (IS_IPA_REPLY(cmd)) {
-			if (cmd->hdr.command < IPA_CMD_SETCCID ||
-			    cmd->hdr.command > IPA_CMD_MODCCID)
+			if (cmd->hdr.command != IPA_CMD_SETCCID &&
+			    cmd->hdr.command != IPA_CMD_DELCCID &&
+			    cmd->hdr.command != IPA_CMD_MODCCID &&
+			    cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 				qeth_issue_ipa_msg(cmd,
 						cmd->hdr.return_code, card);
 			return cmd;
@@ -1100,11 +1103,6 @@ static int qeth_setup_card(struct qeth_card *card)
 	card->thread_running_mask = 0;
 	INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
 	INIT_LIST_HEAD(&card->ip_list);
-	card->ip_tbd_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
-	if (!card->ip_tbd_list) {
-		QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
-		return -ENOMEM;
-	}
 	INIT_LIST_HEAD(card->ip_tbd_list);
 	INIT_LIST_HEAD(&card->cmd_waiter_list);
 	init_waitqueue_head(&card->wait_q);
@@ -1138,21 +1136,30 @@ static struct qeth_card *qeth_alloc_card(void)
 	QETH_DBF_TEXT(SETUP, 2, "alloccrd");
 	card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
 	if (!card)
-		return NULL;
+		goto out;
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
-	if (qeth_setup_channel(&card->read)) {
-		kfree(card);
-		return NULL;
-	}
-	if (qeth_setup_channel(&card->write)) {
-		qeth_clean_channel(&card->read);
-		kfree(card);
-		return NULL;
+	card->ip_tbd_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+	if (!card->ip_tbd_list) {
+		QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
+		goto out_card;
 	}
+	if (qeth_setup_channel(&card->read))
+		goto out_ip;
+	if (qeth_setup_channel(&card->write))
+		goto out_channel;
 	card->options.layer2 = -1;
 	card->qeth_service_level.seq_print = qeth_core_sl_print;
 	register_service_level(&card->qeth_service_level);
 	return card;
+
+out_channel:
+	qeth_clean_channel(&card->read);
+out_ip:
+	kfree(card->ip_tbd_list);
+out_card:
+	kfree(card);
+out:
+	return NULL;
 }
 
 static int qeth_determine_card_type(struct qeth_card *card)
@@ -2573,8 +2580,8 @@ int qeth_query_setadapterparms(struct qeth_card *card)
 }
 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
 
-int qeth_check_qdio_errors(struct qdio_buffer *buf, unsigned int qdio_error,
-		const char *dbftext)
+int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf,
+		unsigned int qdio_error, const char *dbftext)
 {
 	if (qdio_error) {
 		QETH_DBF_TEXT(TRACE, 2, dbftext);
@@ -2584,7 +2591,11 @@ int qeth_check_qdio_errors(struct qdio_buffer *buf, unsigned int qdio_error,
 		QETH_DBF_TEXT_(QERR, 2, " F14=%02X",
 			       buf->element[14].flags & 0xff);
 		QETH_DBF_TEXT_(QERR, 2, " qerr=%X", qdio_error);
-		return 1;
+		if ((buf->element[15].flags & 0xff) == 0x12) {
+			card->stats.rx_dropped++;
+			return 0;
+		} else
+			return 1;
 	}
 	return 0;
 }
@@ -2667,7 +2678,7 @@ static int qeth_handle_send_error(struct qeth_card *card,
 			qdio_err = 1;
 		}
 	}
-	qeth_check_qdio_errors(buffer->buffer, qdio_err, "qouterr");
+	qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
 
 	if (!qdio_err)
 		return QETH_SEND_ERROR_NONE;
@@ -3509,6 +3520,7 @@ void qeth_tx_timeout(struct net_device *dev)
 {
 	struct qeth_card *card;
 
+	QETH_DBF_TEXT(TRACE, 4, "txtimeo");
 	card = dev->ml_priv;
 	card->stats.tx_errors++;
 	qeth_schedule_recovery(card);
@@ -3847,9 +3859,7 @@ static int qeth_core_driver_group(const char *buf, struct device *root_dev,
 
 int qeth_core_hardsetup_card(struct qeth_card *card)
 {
-	struct qdio_ssqd_desc *ssqd;
 	int retries = 0;
-	int mpno = 0;
 	int rc;
 
 	QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
@@ -3882,31 +3892,6 @@ retriable:
 		else
 			goto retry;
 	}
-
-	rc = qeth_get_unitaddr(card);
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
-		return rc;
-	}
-
-	ssqd = kmalloc(sizeof(struct qdio_ssqd_desc), GFP_KERNEL);
-	if (!ssqd) {
-		rc = -ENOMEM;
-		goto out;
-	}
-	rc = qdio_get_ssqd_desc(CARD_DDEV(card), ssqd);
-	if (rc == 0)
-		mpno = ssqd->pcnt;
-	kfree(ssqd);
-
-	if (mpno)
-		mpno = min(mpno - 1, QETH_MAX_PORTNO);
-	if (card->info.portno > mpno) {
-		QETH_DBF_MESSAGE(2, "Device %s does not offer port number %d"
-			"\n.", CARD_BUS_ID(card), card->info.portno);
-		rc = -ENODEV;
-		goto out;
-	}
 	qeth_init_tokens(card);
 	qeth_init_func_level(card);
 	rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
@@ -3990,7 +3975,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
 	struct qdio_buffer_element *element = *__element;
 	int offset = *__offset;
 	struct sk_buff *skb = NULL;
-	int skb_len;
+	int skb_len = 0;
 	void *data_ptr;
 	int data_len;
 	int headroom = 0;
@@ -4009,20 +3994,24 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
 	*hdr = element->addr + offset;
 
 	offset += sizeof(struct qeth_hdr);
-	if (card->options.layer2) {
-		if (card->info.type == QETH_CARD_TYPE_OSN) {
-			skb_len = (*hdr)->hdr.osn.pdu_length;
-			headroom = sizeof(struct qeth_hdr);
-		} else {
-			skb_len = (*hdr)->hdr.l2.pkt_length;
-		}
-	} else {
+	switch ((*hdr)->hdr.l2.id) {
+	case QETH_HEADER_TYPE_LAYER2:
+		skb_len = (*hdr)->hdr.l2.pkt_length;
+		break;
+	case QETH_HEADER_TYPE_LAYER3:
 		skb_len = (*hdr)->hdr.l3.length;
 		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
 		    (card->info.link_type == QETH_LINK_TYPE_HSTR))
 			headroom = TR_HLEN;
 		else
 			headroom = ETH_HLEN;
+		break;
+	case QETH_HEADER_TYPE_OSN:
+		skb_len = (*hdr)->hdr.osn.pdu_length;
+		headroom = sizeof(struct qeth_hdr);
+		break;
+	default:
+		break;
 	}
 
 	if (!skb_len)
@@ -4177,6 +4166,33 @@ void qeth_core_free_discipline(struct qeth_card *card)
 	card->discipline.ccwgdriver = NULL;
 }
 
+static void qeth_determine_capabilities(struct qeth_card *card)
+{
+	int rc;
+
+	QETH_DBF_TEXT(SETUP, 2, "detcapab");
+	rc = ccw_device_set_online(CARD_DDEV(card));
+	if (rc) {
+		QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
+		goto out;
+	}
+
+	rc = qeth_get_unitaddr(card);
+	if (rc) {
+		QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
+		goto out_offline;
+	}
+
+	rc = qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
+	if (rc)
+		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
+
+out_offline:
+	ccw_device_set_offline(CARD_DDEV(card));
+out:
+	return;
+}
+
 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 {
 	struct qeth_card *card;
@@ -4242,6 +4258,8 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 	list_add_tail(&card->list, &qeth_core_card_list.list);
 	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
+
+	qeth_determine_capabilities(card);
 	return 0;
 
 err_card:
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index 1ba51152f667..104a3351e02b 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -156,6 +156,8 @@ enum qeth_ipa_return_codes {
 	IPA_RC_IP_TABLE_FULL		= 0x0002,
 	IPA_RC_UNKNOWN_ERROR		= 0x0003,
 	IPA_RC_UNSUPPORTED_COMMAND	= 0x0004,
+	IPA_RC_TRACE_ALREADY_ACTIVE	= 0x0005,
+	IPA_RC_INVALID_FORMAT		= 0x0006,
 	IPA_RC_DUP_IPV6_REMOTE		= 0x0008,
 	IPA_RC_DUP_IPV6_HOME		= 0x0010,
 	IPA_RC_UNREGISTERED_ADDR	= 0x0011,
@@ -196,6 +198,11 @@ enum qeth_ipa_return_codes {
 	IPA_RC_INVALID_IP_VERSION2	= 0xf001,
 	IPA_RC_FFFF			= 0xffff
 };
+/* for DELIP */
+#define IPA_RC_IP_ADDRESS_NOT_DEFINED	IPA_RC_PRIMARY_ALREADY_DEFINED
+/* for SET_DIAGNOSTIC_ASSIST */
+#define IPA_RC_INVALID_SUBCMD		IPA_RC_IP_TABLE_FULL
+#define IPA_RC_HARDWARE_AUTH_ERROR	IPA_RC_UNKNOWN_ERROR
 
 /* IPA function flags; each flag marks availability of respective function */
 enum qeth_ipa_funcs {
@@ -246,6 +253,7 @@ enum qeth_ipa_setadp_cmd {
 	IPA_SETADP_SET_SNMP_CONTROL		= 0x00000200L,
 	IPA_SETADP_QUERY_CARD_INFO		= 0x00000400L,
 	IPA_SETADP_SET_PROMISC_MODE		= 0x00000800L,
+	IPA_SETADP_SET_DIAG_ASSIST		= 0x00002000L,
 	IPA_SETADP_SET_ACCESS_CONTROL		= 0x00010000L,
 };
 enum qeth_ipa_mac_ops {
@@ -424,6 +432,40 @@ struct qeth_create_destroy_address {
 	__u8 unique_id[8];
 } __attribute__ ((packed));
 
+/* SET DIAGNOSTIC ASSIST IPA Command:	 *************************************/
+
+enum qeth_diags_cmds {
+	QETH_DIAGS_CMD_QUERY	= 0x0001,
+	QETH_DIAGS_CMD_TRAP	= 0x0002,
+	QETH_DIAGS_CMD_TRACE	= 0x0004,
+	QETH_DIAGS_CMD_NOLOG	= 0x0008,
+	QETH_DIAGS_CMD_DUMP	= 0x0010,
+};
+
+enum qeth_diags_trace_types {
+	QETH_DIAGS_TYPE_HIPERSOCKET	= 0x02,
+};
+
+enum qeth_diags_trace_cmds {
+	QETH_DIAGS_CMD_TRACE_ENABLE	= 0x0001,
+	QETH_DIAGS_CMD_TRACE_DISABLE	= 0x0002,
+	QETH_DIAGS_CMD_TRACE_MODIFY	= 0x0004,
+	QETH_DIAGS_CMD_TRACE_REPLACE	= 0x0008,
+	QETH_DIAGS_CMD_TRACE_QUERY	= 0x0010,
+};
+
+struct qeth_ipacmd_diagass {
+	__u32  host_tod2;
+	__u32:32;
+	__u16  subcmd_len;
+	__u16:16;
+	__u32  subcmd;
+	__u8   type;
+	__u8   action;
+	__u16  options;
+	__u32:32;
+} __attribute__ ((packed));
+
 /* Header for each IPA command */
 struct qeth_ipacmd_hdr {
 	__u8   command;
@@ -452,6 +494,7 @@ struct qeth_ipa_cmd {
 		struct qeth_create_destroy_address	create_destroy_addr;
 		struct qeth_ipacmd_setadpparms		setadapterparms;
 		struct qeth_set_routing			setrtg;
+		struct qeth_ipacmd_diagass		diagass;
 	} data;
 } __attribute__ ((packed));
 
@@ -469,7 +512,6 @@ enum qeth_ipa_arp_return_codes {
 	QETH_IPA_ARP_RC_Q_NO_DATA    = 0x0008,
 };
 
-
 extern char *qeth_get_ipa_msg(enum qeth_ipa_return_codes rc);
 extern char *qeth_get_ipa_cmd_name(enum qeth_ipa_cmds cmd);
 
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index 9ff2b36fdc43..ac2239a4f133 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -118,7 +118,7 @@ static ssize_t qeth_dev_portno_store(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	char *tmp;
-	unsigned int portno;
+	unsigned int portno, limit;
 
 	if (!card)
 		return -EINVAL;
@@ -128,9 +128,11 @@ static ssize_t qeth_dev_portno_store(struct device *dev,
 		return -EPERM;
 
 	portno = simple_strtoul(buf, &tmp, 16);
-	if (portno > QETH_MAX_PORTNO) {
+	if (portno > QETH_MAX_PORTNO)
+		return -EINVAL;
+	limit = (card->ssqd.pcnt ? card->ssqd.pcnt - 1 : card->ssqd.pcnt);
+	if (portno > limit)
 		return -EINVAL;
-	}
 
 	card->info.portno = portno;
 	return count;
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 038299ae3feb..74ba388a159f 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -769,7 +769,8 @@ static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 		index = i % QDIO_MAX_BUFFERS_PER_Q;
 		buffer = &card->qdio.in_q->bufs[index];
 		if (!(qdio_err &&
-		      qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
+		      qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
+					     "qinerr")))
 			qeth_l2_process_inbound_buffer(card, buffer, index);
 		/* clear buffer and give back to hardware */
 		qeth_put_buffer_pool_entry(card, buffer->pool_entry);
diff --git a/drivers/s390/net/qeth_l3.h b/drivers/s390/net/qeth_l3.h
index 321988fa9f7d..8447d233d0b3 100644
--- a/drivers/s390/net/qeth_l3.h
+++ b/drivers/s390/net/qeth_l3.h
@@ -13,6 +13,8 @@
 
 #include "qeth_core.h"
 
+#define QETH_SNIFF_AVAIL	0x0008
+
 struct qeth_ipaddr {
 	struct list_head entry;
 	enum qeth_ip_types type;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index fd1b6ed3721f..337d03fb045d 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -242,6 +242,8 @@ static int __qeth_l3_insert_ip_todo(struct qeth_card *card,
 	struct qeth_ipaddr *tmp, *t;
 	int found = 0;
 
+	if (card->options.sniffer)
+		return 0;
 	list_for_each_entry_safe(tmp, t, card->ip_tbd_list, entry) {
 		if ((addr->type == QETH_IP_TYPE_DEL_ALL_MC) &&
 		    (tmp->type == QETH_IP_TYPE_DEL_ALL_MC))
@@ -457,6 +459,8 @@ static void qeth_l3_set_ip_addr_list(struct qeth_card *card)
 	QETH_DBF_TEXT(TRACE, 2, "sdiplist");
 	QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
 
+	if (card->options.sniffer)
+		return;
 	spin_lock_irqsave(&card->ip_lock, flags);
 	tbd_list = card->ip_tbd_list;
 	card->ip_tbd_list = kmalloc(sizeof(struct list_head), GFP_ATOMIC);
@@ -495,7 +499,7 @@ static void qeth_l3_set_ip_addr_list(struct qeth_card *card)
 			spin_unlock_irqrestore(&card->ip_lock, flags);
 			rc = qeth_l3_deregister_addr_entry(card, addr);
 			spin_lock_irqsave(&card->ip_lock, flags);
-			if (!rc || (rc == IPA_RC_PRIMARY_ALREADY_DEFINED))
+			if (!rc || (rc == IPA_RC_IP_ADDRESS_NOT_DEFINED))
 				kfree(addr);
 			else
 				list_add_tail(&addr->entry, &card->ip_list);
@@ -513,6 +517,8 @@ static void qeth_l3_clear_ip_list(struct qeth_card *card, int clean,
 	unsigned long flags;
 
 	QETH_DBF_TEXT(TRACE, 4, "clearip");
+	if (recover && card->options.sniffer)
+		return;
 	spin_lock_irqsave(&card->ip_lock, flags);
 	/* clear todo list */
 	list_for_each_entry_safe(addr, tmp, card->ip_tbd_list, entry) {
@@ -1674,6 +1680,76 @@ static int qeth_l3_get_unique_id(struct qeth_card *card)
 	return rc;
 }
 
+static int
+qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
+			    unsigned long data)
+{
+	struct qeth_ipa_cmd	   *cmd;
+	__u16 rc;
+
+	QETH_DBF_TEXT(SETUP, 2, "diastrcb");
+
+	cmd = (struct qeth_ipa_cmd *)data;
+	rc = cmd->hdr.return_code;
+	if (rc) {
+		QETH_DBF_TEXT_(TRACE, 2, "dxter%x", rc);
+		if (cmd->data.diagass.action == QETH_DIAGS_CMD_TRACE_ENABLE) {
+			switch (rc) {
+			case IPA_RC_HARDWARE_AUTH_ERROR:
+				dev_warn(&card->gdev->dev, "The device is not "
+					"authorized to run as a HiperSockets "
+					"network traffic analyzer\n");
+				break;
+			case IPA_RC_TRACE_ALREADY_ACTIVE:
+				dev_warn(&card->gdev->dev, "A HiperSockets "
+					"network traffic analyzer is already "
+					"active in the HiperSockets LAN\n");
+				break;
+			default:
+				break;
+			}
+		}
+		return 0;
+	}
+
+	switch (cmd->data.diagass.action) {
+	case QETH_DIAGS_CMD_TRACE_QUERY:
+		break;
+	case QETH_DIAGS_CMD_TRACE_DISABLE:
+		card->info.promisc_mode = SET_PROMISC_MODE_OFF;
+		dev_info(&card->gdev->dev, "The HiperSockets network traffic "
+			"analyzer is deactivated\n");
+		break;
+	case QETH_DIAGS_CMD_TRACE_ENABLE:
+		card->info.promisc_mode = SET_PROMISC_MODE_ON;
+		dev_info(&card->gdev->dev, "The HiperSockets network traffic "
+			"analyzer is activated\n");
+		break;
+	default:
+		QETH_DBF_MESSAGE(2, "Unknown sniffer action (0x%04x) on %s\n",
+			cmd->data.diagass.action, QETH_CARD_IFNAME(card));
+	}
+
+	return 0;
+}
+
+static int
+qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
+{
+	struct qeth_cmd_buffer *iob;
+	struct qeth_ipa_cmd    *cmd;
+
+	QETH_DBF_TEXT(SETUP, 2, "diagtrac");
+
+	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
+	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
+	cmd->data.diagass.subcmd_len = 16;
+	cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRACE;
+	cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
+	cmd->data.diagass.action = diags_cmd;
+	return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
+}
+
 static void qeth_l3_get_mac_for_ipm(__u32 ipm, char *mac,
 				struct net_device *dev)
 {
@@ -1951,7 +2027,10 @@ static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card,
 		case QETH_CAST_ANYCAST:
 		case QETH_CAST_NOCAST:
 		default:
-			skb->pkt_type = PACKET_HOST;
+			if (card->options.sniffer)
+				skb->pkt_type = PACKET_OTHERHOST;
+			else
+				skb->pkt_type = PACKET_HOST;
 			memcpy(tg_addr, card->dev->dev_addr,
 				card->dev->addr_len);
 		}
@@ -2007,7 +2086,6 @@ static void qeth_l3_process_inbound_buffer(struct qeth_card *card,
 	int offset;
 	__u16 vlan_tag = 0;
 	unsigned int len;
-
 	/* get first element of current buffer */
 	element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 	offset = 0;
@@ -2026,7 +2104,7 @@ static void qeth_l3_process_inbound_buffer(struct qeth_card *card,
 		case QETH_HEADER_TYPE_LAYER3:
 			vlan_tag = qeth_l3_rebuild_skb(card, skb, hdr);
 			len = skb->len;
-			if (vlan_tag)
+			if (vlan_tag && !card->options.sniffer)
 				if (card->vlangrp)
 					vlan_hwaccel_rx(skb, card->vlangrp,
 						vlan_tag);
@@ -2037,6 +2115,16 @@ static void qeth_l3_process_inbound_buffer(struct qeth_card *card,
 			else
 				netif_rx(skb);
 			break;
+		case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
+			skb->pkt_type = PACKET_HOST;
+			skb->protocol = eth_type_trans(skb, skb->dev);
+			if (card->options.checksum_type == NO_CHECKSUMMING)
+				skb->ip_summed = CHECKSUM_UNNECESSARY;
+			else
+				skb->ip_summed = CHECKSUM_NONE;
+			len = skb->len;
+			netif_receive_skb(skb);
+			break;
 		default:
 			dev_kfree_skb_any(skb);
 			QETH_DBF_TEXT(TRACE, 3, "inbunkno");
@@ -2118,6 +2206,9 @@ static int qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 
 	qeth_set_allowed_threads(card, 0, 1);
+	if (card->options.sniffer &&
+	    (card->info.promisc_mode == SET_PROMISC_MODE_ON))
+		qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
 	if (card->read.state == CH_STATE_UP &&
 	    card->write.state == CH_STATE_UP &&
 	    (card->state == CARD_STATE_UP)) {
@@ -2162,6 +2253,36 @@ static int qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
 	return rc;
 }
 
+/*
+ * test for and Switch promiscuous mode (on or off)
+ *  either for guestlan or HiperSocket Sniffer
+ */
+static void
+qeth_l3_handle_promisc_mode(struct qeth_card *card)
+{
+	struct net_device *dev = card->dev;
+
+	if (((dev->flags & IFF_PROMISC) &&
+	     (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
+	    (!(dev->flags & IFF_PROMISC) &&
+	     (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
+		return;
+
+	if (card->info.guestlan) {		/* Guestlan trace */
+		if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
+			qeth_setadp_promisc_mode(card);
+	} else if (card->options.sniffer &&	/* HiperSockets trace */
+		   qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
+		if (dev->flags & IFF_PROMISC) {
+			QETH_DBF_TEXT(TRACE, 3, "+promisc");
+			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
+		} else {
+			QETH_DBF_TEXT(TRACE, 3, "-promisc");
+			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
+		}
+	}
+}
+
 static void qeth_l3_set_multicast_list(struct net_device *dev)
 {
 	struct qeth_card *card = dev->ml_priv;
@@ -2170,15 +2291,17 @@ static void qeth_l3_set_multicast_list(struct net_device *dev)
 	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 	    (card->state != CARD_STATE_UP))
 		return;
-	qeth_l3_delete_mc_addresses(card);
-	qeth_l3_add_multicast_ipv4(card);
+	if (!card->options.sniffer) {
+		qeth_l3_delete_mc_addresses(card);
+		qeth_l3_add_multicast_ipv4(card);
 #ifdef CONFIG_QETH_IPV6
-	qeth_l3_add_multicast_ipv6(card);
+		qeth_l3_add_multicast_ipv6(card);
 #endif
-	qeth_l3_set_ip_addr_list(card);
-	if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
-		return;
-	qeth_setadp_promisc_mode(card);
+		qeth_l3_set_ip_addr_list(card);
+		if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
+			return;
+	}
+	qeth_l3_handle_promisc_mode(card);
 }
 
 static const char *qeth_l3_arp_get_error_cause(int *rc)
@@ -2778,8 +2901,9 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	int nr_frags;
 
 	if ((card->info.type == QETH_CARD_TYPE_IQD) &&
-	    (skb->protocol != htons(ETH_P_IPV6)) &&
-	    (skb->protocol != htons(ETH_P_IP)))
+	    (((skb->protocol != htons(ETH_P_IPV6)) &&
+	      (skb->protocol != htons(ETH_P_IP))) ||
+	     card->options.sniffer))
 			goto tx_drop;
 
 	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
@@ -3155,7 +3279,7 @@ static void qeth_l3_qdio_input_handler(struct ccw_device *ccwdev,
 		index = i % QDIO_MAX_BUFFERS_PER_Q;
 		buffer = &card->qdio.in_q->bufs[index];
 		if (!(qdio_err &&
-		      qeth_check_qdio_errors(buffer->buffer,
+		      qeth_check_qdio_errors(card, buffer->buffer,
 					     qdio_err, "qinerr")))
 			qeth_l3_process_inbound_buffer(card, buffer, index);
 		/* clear buffer and give back to hardware */
@@ -3250,20 +3374,22 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		goto out_remove;
 	} else
 		card->lan_online = 1;
-	qeth_l3_set_large_send(card, card->options.large_send);
 
 	rc = qeth_l3_setadapter_parms(card);
 	if (rc)
 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
-	rc = qeth_l3_start_ipassists(card);
-	if (rc)
-		QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
-	rc = qeth_l3_setrouting_v4(card);
-	if (rc)
-		QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
-	rc = qeth_l3_setrouting_v6(card);
-	if (rc)
-		QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
+	if (!card->options.sniffer) {
+		rc = qeth_l3_start_ipassists(card);
+		if (rc)
+			QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
+		qeth_l3_set_large_send(card, card->options.large_send);
+		rc = qeth_l3_setrouting_v4(card);
+		if (rc)
+			QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
+		rc = qeth_l3_setrouting_v6(card);
+		if (rc)
+			QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
+	}
 	netif_tx_disable(card->dev);
 
 	rc = qeth_init_qdio_queues(card);
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index 3360b0941aa1..3f08b11274ae 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -319,6 +319,61 @@ static ssize_t qeth_l3_dev_checksum_store(struct device *dev,
 static DEVICE_ATTR(checksumming, 0644, qeth_l3_dev_checksum_show,
 		qeth_l3_dev_checksum_store);
 
+static ssize_t qeth_l3_dev_sniffer_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+
+	if (!card)
+		return -EINVAL;
+
+	return sprintf(buf, "%i\n", card->options.sniffer ? 1 : 0);
+}
+
+static ssize_t qeth_l3_dev_sniffer_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+	int ret;
+	unsigned long i;
+
+	if (!card)
+		return -EINVAL;
+
+	if (card->info.type != QETH_CARD_TYPE_IQD)
+		return -EPERM;
+
+	if ((card->state != CARD_STATE_DOWN) &&
+	    (card->state != CARD_STATE_RECOVER))
+		return -EPERM;
+
+	ret = strict_strtoul(buf, 16, &i);
+	if (ret)
+		return -EINVAL;
+	switch (i) {
+	case 0:
+		card->options.sniffer = i;
+		break;
+	case 1:
+		ret = qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
+		if (card->ssqd.qdioac2 & QETH_SNIFF_AVAIL) {
+			card->options.sniffer = i;
+			if (card->qdio.init_pool.buf_count !=
+					QETH_IN_BUF_COUNT_MAX)
+				qeth_realloc_buffer_pool(card,
+					QETH_IN_BUF_COUNT_MAX);
+			break;
+		} else
+			return -EPERM;
+	default:   /* fall through */
+		return -EINVAL;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(sniffer, 0644, qeth_l3_dev_sniffer_show,
+		qeth_l3_dev_sniffer_store);
+
 static ssize_t qeth_l3_dev_large_send_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
@@ -373,6 +428,7 @@ static struct attribute *qeth_l3_device_attrs[] = {
 	&dev_attr_broadcast_mode.attr,
 	&dev_attr_canonical_macaddr.attr,
 	&dev_attr_checksumming.attr,
+	&dev_attr_sniffer.attr,
 	&dev_attr_large_send.attr,
 	NULL,
 };