Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: Install firewire-constants.h and firewire-cdev.h for userspace.
  firewire: Change struct fw_cdev_iso_packet to not use bitfields.
  firewire: Implement suspend/resume PCI driver hooks.
  firewire: add to MAINTAINERS
  firewire: fw-sbp2: implement sysfs ieee1394_id
  ieee1394: sbp2: offer SAM-conforming target port ID in sysfs
  ieee1394: fix calculation of sysfs attribute "address"

11 files changed, 247 insertions, 79 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index aa1017556438..124b9508ae2e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1498,6 +1498,14 @@ P:	Alexander Viro
 M:	viro@zeniv.linux.org.uk
 S:	Maintained
 
+FIREWIRE SUBSYSTEM
+P:	Kristian Hoegsberg, Stefan Richter
+M:	krh@redhat.com, stefanr@s5r6.in-berlin.de
+L:	linux1394-devel@lists.sourceforge.net
+W:	http://www.linux1394.org/
+T:	git kernel.org:/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6.git
+S:	Maintained
+
 FIRMWARE LOADER (request_firmware)
 L:	linux-kernel@vger.kernel.org
 S:	Orphan
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 636151a64add..9eb1edacd825 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -407,11 +407,6 @@ fw_card_add(struct fw_card *card,
 	card->link_speed = link_speed;
 	card->guid = guid;
 
-	/* Activate link_on bit and contender bit in our self ID packets.*/
-	if (card->driver->update_phy_reg(card, 4, 0,
-					 PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
-		return -EIO;
-
 	/*
 	 * The subsystem grabs a reference when the card is added and
 	 * drops it when the driver calls fw_core_remove_card.
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 3ab3585d3601..5d402d63799f 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -677,12 +677,21 @@ static int ioctl_create_iso_context(struct client *client, void *buffer)
 	return 0;
 }
 
+/* Macros for decoding the iso packet control header. */
+#define GET_PAYLOAD_LENGTH(v)	((v) & 0xffff)
+#define GET_INTERRUPT(v)	(((v) >> 16) & 0x01)
+#define GET_SKIP(v)		(((v) >> 17) & 0x01)
+#define GET_TAG(v)		(((v) >> 18) & 0x02)
+#define GET_SY(v)		(((v) >> 20) & 0x04)
+#define GET_HEADER_LENGTH(v)	(((v) >> 24) & 0xff)
+
 static int ioctl_queue_iso(struct client *client, void *buffer)
 {
 	struct fw_cdev_queue_iso *request = buffer;
 	struct fw_cdev_iso_packet __user *p, *end, *next;
 	struct fw_iso_context *ctx = client->iso_context;
 	unsigned long payload, buffer_end, header_length;
+	u32 control;
 	int count;
 	struct {
 		struct fw_iso_packet packet;
@@ -717,8 +726,14 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
 	end = (void __user *)p + request->size;
 	count = 0;
 	while (p < end) {
-		if (__copy_from_user(&u.packet, p, sizeof(*p)))
+		if (get_user(control, &p->control))
 			return -EFAULT;
+		u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
+		u.packet.interrupt = GET_INTERRUPT(control);
+		u.packet.skip = GET_SKIP(control);
+		u.packet.tag = GET_TAG(control);
+		u.packet.sy = GET_SY(control);
+		u.packet.header_length = GET_HEADER_LENGTH(control);
 
 		if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
 			header_length = u.packet.header_length;
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
index 0ba9d64ccf4c..af1723eae4ba 100644
--- a/drivers/firewire/fw-device.h
+++ b/drivers/firewire/fw-device.h
@@ -99,6 +99,7 @@ fw_unit(struct device *dev)
 #define CSR_DEPENDENT_INFO	0x14
 #define CSR_MODEL		0x17
 #define CSR_INSTANCE		0x18
+#define CSR_DIRECTORY_ID	0x20
 
 #define SBP2_COMMAND_SET_SPECIFIER	0x38
 #define SBP2_COMMAND_SET		0x39
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 2e4cfa57126d..0d08bf9b78c2 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -417,12 +417,21 @@ ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs)
 	ctx->current_buffer = ab.next;
 	ctx->pointer = ctx->current_buffer->data;
 
-	reg_write(ctx->ohci, COMMAND_PTR(ctx->regs),
-		  le32_to_cpu(ab.descriptor.branch_address));
+	return 0;
+}
+
+static void ar_context_run(struct ar_context *ctx)
+{
+	struct ar_buffer *ab = ctx->current_buffer;
+	dma_addr_t ab_bus;
+	size_t offset;
+
+	offset = offsetof(struct ar_buffer, data);
+	ab_bus = ab->descriptor.data_address - offset;
+
+	reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1);
 	reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN);
 	flush_writes(ctx->ohci);
-
-	return 0;
 }
 
 static void context_tasklet(unsigned long data)
@@ -1039,11 +1048,78 @@ static irqreturn_t irq_handler(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+static int software_reset(struct fw_ohci *ohci)
+{
+	int i;
+
+	reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
+
+	for (i = 0; i < OHCI_LOOP_COUNT; i++) {
+		if ((reg_read(ohci, OHCI1394_HCControlSet) &
+		     OHCI1394_HCControl_softReset) == 0)
+			return 0;
+		msleep(1);
+	}
+
+	return -EBUSY;
+}
+
 static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length)
 {
 	struct fw_ohci *ohci = fw_ohci(card);
 	struct pci_dev *dev = to_pci_dev(card->device);
 
+	if (software_reset(ohci)) {
+		fw_error("Failed to reset ohci card.\n");
+		return -EBUSY;
+	}
+
+	/*
+	 * Now enable LPS, which we need in order to start accessing
+	 * most of the registers.  In fact, on some cards (ALI M5251),
+	 * accessing registers in the SClk domain without LPS enabled
+	 * will lock up the machine.  Wait 50msec to make sure we have
+	 * full link enabled.
+	 */
+	reg_write(ohci, OHCI1394_HCControlSet,
+		  OHCI1394_HCControl_LPS |
+		  OHCI1394_HCControl_postedWriteEnable);
+	flush_writes(ohci);
+	msleep(50);
+
+	reg_write(ohci, OHCI1394_HCControlClear,
+		  OHCI1394_HCControl_noByteSwapData);
+
+	reg_write(ohci, OHCI1394_LinkControlSet,
+		  OHCI1394_LinkControl_rcvSelfID |
+		  OHCI1394_LinkControl_cycleTimerEnable |
+		  OHCI1394_LinkControl_cycleMaster);
+
+	reg_write(ohci, OHCI1394_ATRetries,
+		  OHCI1394_MAX_AT_REQ_RETRIES |
+		  (OHCI1394_MAX_AT_RESP_RETRIES << 4) |
+		  (OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
+
+	ar_context_run(&ohci->ar_request_ctx);
+	ar_context_run(&ohci->ar_response_ctx);
+
+	reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
+	reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000);
+	reg_write(ohci, OHCI1394_IntEventClear, ~0);
+	reg_write(ohci, OHCI1394_IntMaskClear, ~0);
+	reg_write(ohci, OHCI1394_IntMaskSet,
+		  OHCI1394_selfIDComplete |
+		  OHCI1394_RQPkt | OHCI1394_RSPkt |
+		  OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
+		  OHCI1394_isochRx | OHCI1394_isochTx |
+		  OHCI1394_masterIntEnable |
+		  OHCI1394_cycle64Seconds);
+
+	/* Activate link_on bit and contender bit in our self ID packets.*/
+	if (ohci_update_phy_reg(card, 4, 0,
+				PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
+		return -EIO;
+
 	/*
 	 * When the link is not yet enabled, the atomic config rom
 	 * update mechanism described below in ohci_set_config_rom()
@@ -1701,22 +1777,6 @@ static const struct fw_card_driver ohci_driver = {
 	.stop_iso		= ohci_stop_iso,
 };
 
-static int software_reset(struct fw_ohci *ohci)
-{
-	int i;
-
-	reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
-
-	for (i = 0; i < OHCI_LOOP_COUNT; i++) {
-		if ((reg_read(ohci, OHCI1394_HCControlSet) &
-		     OHCI1394_HCControl_softReset) == 0)
-			return 0;
-		msleep(1);
-	}
-
-	return -EBUSY;
-}
-
 static int __devinit
 pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 {
@@ -1762,33 +1822,6 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 		goto fail_iomem;
 	}
 
-	if (software_reset(ohci)) {
-		fw_error("Failed to reset ohci card.\n");
-		err = -EBUSY;
-		goto fail_registers;
-	}
-
-	/*
-	 * Now enable LPS, which we need in order to start accessing
-	 * most of the registers.  In fact, on some cards (ALI M5251),
-	 * accessing registers in the SClk domain without LPS enabled
-	 * will lock up the machine.  Wait 50msec to make sure we have
-	 * full link enabled.
-	 */
-	reg_write(ohci, OHCI1394_HCControlSet,
-		  OHCI1394_HCControl_LPS |
-		  OHCI1394_HCControl_postedWriteEnable);
-	flush_writes(ohci);
-	msleep(50);
-
-	reg_write(ohci, OHCI1394_HCControlClear,
-		  OHCI1394_HCControl_noByteSwapData);
-
-	reg_write(ohci, OHCI1394_LinkControlSet,
-		  OHCI1394_LinkControl_rcvSelfID |
-		  OHCI1394_LinkControl_cycleTimerEnable |
-		  OHCI1394_LinkControl_cycleMaster);
-
 	ar_context_init(&ohci->ar_request_ctx, ohci,
 			OHCI1394_AsReqRcvContextControlSet);
 
@@ -1801,11 +1834,6 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 	context_init(&ohci->at_response_ctx, ohci, AT_BUFFER_SIZE,
 		     OHCI1394_AsRspTrContextControlSet, handle_at_packet);
 
-	reg_write(ohci, OHCI1394_ATRetries,
-		  OHCI1394_MAX_AT_REQ_RETRIES |
-		  (OHCI1394_MAX_AT_RESP_RETRIES << 4) |
-		  (OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
-
 	reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
 	ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
 	reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
@@ -1835,18 +1863,6 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
 		goto fail_registers;
 	}
 
-	reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
-	reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000);
-	reg_write(ohci, OHCI1394_IntEventClear, ~0);
-	reg_write(ohci, OHCI1394_IntMaskClear, ~0);
-	reg_write(ohci, OHCI1394_IntMaskSet,
-		  OHCI1394_selfIDComplete |
-		  OHCI1394_RQPkt | OHCI1394_RSPkt |
-		  OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
-		  OHCI1394_isochRx | OHCI1394_isochTx |
-		  OHCI1394_masterIntEnable |
-		  OHCI1394_cycle64Seconds);
-
 	bus_options = reg_read(ohci, OHCI1394_BusOptions);
 	max_receive = (bus_options >> 12) & 0xf;
 	link_speed = bus_options & 0x7;
@@ -1908,6 +1924,45 @@ static void pci_remove(struct pci_dev *dev)
 	fw_notify("Removed fw-ohci device.\n");
 }
 
+#ifdef CONFIG_PM
+static int pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct fw_ohci *ohci = pci_get_drvdata(pdev);
+	int err;
+
+	software_reset(ohci);
+	free_irq(pdev->irq, ohci);
+	err = pci_save_state(pdev);
+	if (err) {
+		fw_error("pci_save_state failed with %d", err);
+		return err;
+	}
+	err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
+	if (err) {
+		fw_error("pci_set_power_state failed with %d", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int pci_resume(struct pci_dev *pdev)
+{
+	struct fw_ohci *ohci = pci_get_drvdata(pdev);
+	int err;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+	err = pci_enable_device(pdev);
+	if (err) {
+		fw_error("pci_enable_device failed with %d", err);
+		return err;
+	}
+
+	return ohci_enable(&ohci->card, ohci->config_rom, CONFIG_ROM_SIZE);
+}
+#endif
+
 static struct pci_device_id pci_table[] = {
 	{ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
 	{ }
@@ -1920,6 +1975,10 @@ static struct pci_driver fw_ohci_pci_driver = {
 	.id_table	= pci_table,
 	.probe		= pci_probe,
 	.remove		= pci_remove,
+#ifdef CONFIG_PM
+	.resume		= pci_resume,
+	.suspend	= pci_suspend,
+#endif
 };
 
 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index 68300414e5f4..a98d3915e26f 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1108,6 +1108,58 @@ static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
 	return SUCCESS;
 }
 
+/*
+ * Format of /sys/bus/scsi/devices/.../ieee1394_id:
+ * u64 EUI-64 : u24 directory_ID : u16 LUN  (all printed in hexadecimal)
+ *
+ * This is the concatenation of target port identifier and logical unit
+ * identifier as per SAM-2...SAM-4 annex A.
+ */
+static ssize_t
+sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct sbp2_device *sd;
+	struct fw_unit *unit;
+	struct fw_device *device;
+	u32 directory_id;
+	struct fw_csr_iterator ci;
+	int key, value, lun;
+
+	if (!sdev)
+		return 0;
+	sd = (struct sbp2_device *)sdev->host->hostdata;
+	unit = sd->unit;
+	device = fw_device(unit->device.parent);
+
+	/* implicit directory ID */
+	directory_id = ((unit->directory - device->config_rom) * 4
+			+ CSR_CONFIG_ROM) & 0xffffff;
+
+	/* explicit directory ID, overrides implicit ID if present */
+	fw_csr_iterator_init(&ci, unit->directory);
+	while (fw_csr_iterator_next(&ci, &key, &value))
+		if (key == CSR_DIRECTORY_ID) {
+			directory_id = value;
+			break;
+		}
+
+	/* FIXME: Make this work for multi-lun devices. */
+	lun = 0;
+
+	return sprintf(buf, "%08x%08x:%06x:%04x\n",
+			device->config_rom[3], device->config_rom[4],
+			directory_id, lun);
+}
+
+static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
+
+static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
+	&dev_attr_ieee1394_id,
+	NULL
+};
+
 static struct scsi_host_template scsi_driver_template = {
 	.module			= THIS_MODULE,
 	.name			= "SBP-2 IEEE-1394",
@@ -1121,6 +1173,7 @@ static struct scsi_host_template scsi_driver_template = {
 	.use_clustering		= ENABLE_CLUSTERING,
 	.cmd_per_lun		= 1,
 	.can_queue		= 1,
+	.sdev_attrs		= sbp2_scsi_sysfs_attrs,
 };
 
 MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 835937e38529..81b3864d2ba7 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -976,7 +976,8 @@ static struct unit_directory *nodemgr_process_unit_directory
 
 	ud->ne = ne;
 	ud->ignore_driver = ignore_drivers;
-	ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
+	ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
+	ud->directory_id = ud->address & 0xffffff;
 	ud->ud_kv = ud_kv;
 	ud->id = (*id)++;
 
@@ -1085,6 +1086,10 @@ static struct unit_directory *nodemgr_process_unit_directory
 
 			break;
 
+		case CSR1212_KV_ID_DIRECTORY_ID:
+			ud->directory_id = kv->value.immediate;
+			break;
+
 		default:
 			break;
 		}
diff --git a/drivers/ieee1394/nodemgr.h b/drivers/ieee1394/nodemgr.h
index e7ac683c72c7..4530b29d941c 100644
--- a/drivers/ieee1394/nodemgr.h
+++ b/drivers/ieee1394/nodemgr.h
@@ -75,6 +75,7 @@ struct unit_directory {
 	struct csr1212_keyval *model_name_kv;
 	quadlet_t specifier_id;
 	quadlet_t version;
+	quadlet_t directory_id;
 
 	unsigned int id;
 
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 875eadd5e8f5..3f873cc7e247 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -194,6 +194,27 @@ MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
 	", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
 	", or a combination)");
 
+/*
+ * This influences the format of the sysfs attribute
+ * /sys/bus/scsi/devices/.../ieee1394_id.
+ *
+ * The default format is like in older kernels:  %016Lx:%d:%d
+ * It contains the target's EUI-64, a number given to the logical unit by
+ * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
+ *
+ * The long format is:  %016Lx:%06x:%04x
+ * It contains the target's EUI-64, the unit directory's directory_ID as per
+ * IEEE 1212 clause 7.7.19, and the LUN.  This format comes closest to the
+ * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
+ * Architecture Model) rev.2 to 4 annex A.  Therefore and because it is
+ * independent of the implementation of the ieee1394 nodemgr, the longer format
+ * is recommended for future use.
+ */
+static int sbp2_long_sysfs_ieee1394_id;
+module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
+MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
+		 "(default = backwards-compatible = N, SAM-conforming = Y)");
+
 
 #define SBP2_INFO(fmt, args...)	HPSB_INFO("sbp2: "fmt, ## args)
 #define SBP2_ERR(fmt, args...)	HPSB_ERR("sbp2: "fmt, ## args)
@@ -2100,8 +2121,14 @@ static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
 	if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
 		return 0;
 
-	return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid,
-		       lu->ud->id, ORB_SET_LUN(lu->lun));
+	if (sbp2_long_sysfs_ieee1394_id)
+		return sprintf(buf, "%016Lx:%06x:%04x\n",
+				(unsigned long long)lu->ne->guid,
+				lu->ud->directory_id, ORB_SET_LUN(lu->lun));
+	else
+		return sprintf(buf, "%016Lx:%d:%d\n",
+				(unsigned long long)lu->ne->guid,
+				lu->ud->id, ORB_SET_LUN(lu->lun));
 }
 
 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index e1013156c25e..f317c270d4bf 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -62,6 +62,8 @@ header-y += fadvise.h
 header-y += fd.h
 header-y += fdreg.h
 header-y += fib_rules.h
+header-y += firewire-cdev.h
+header-y += firewire-constants.h
 header-y += fuse.h
 header-y += genetlink.h
 header-y += gen_stats.h
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h
index d4455eb2ae35..efbe1fda1a22 100644
--- a/include/linux/firewire-cdev.h
+++ b/include/linux/firewire-cdev.h
@@ -198,13 +198,15 @@ struct fw_cdev_create_iso_context {
 	__u32 handle;
 };
 
+#define FW_CDEV_ISO_PAYLOAD_LENGTH(v)	(v)
+#define FW_CDEV_ISO_INTERRUPT		(1 << 16)
+#define FW_CDEV_ISO_SKIP		(1 << 17)
+#define FW_CDEV_ISO_TAG(v)		((v) << 18)
+#define FW_CDEV_ISO_SY(v)		((v) << 20)
+#define FW_CDEV_ISO_HEADER_LENGTH(v)	((v) << 24)
+
 struct fw_cdev_iso_packet {
-	__u16 payload_length;	/* Length of indirect payload. */
-	__u32 interrupt : 1;	/* Generate interrupt on this packet */
-	__u32 skip : 1;		/* Set to not send packet at all. */
-	__u32 tag : 2;
-	__u32 sy : 4;
-	__u32 header_length : 8;	/* Length of immediate header. */
+	__u32 control;
 	__u32 header[0];
 };