MODULE_DEVICE_TABLE(pci, aac_pci_tbl);
/*
- * dmb - For now we add the number of channels to this structure.
+ * dmb - For now we add the number of channels to this structure.
* In the future we should add a fib that reports the number of channels
* for the card. At that time we can remove the channels from here
*/
* Queues a command for execution by the associated Host Adapter.
*
* TODO: unify with aac_scsi_cmd().
- */
+ */
static int aac_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
}
cmd->SCp.phase = AAC_OWNER_LOWLEVEL;
return (aac_scsi_cmd(cmd) ? FAILED : 0);
-}
+}
/**
* aac_info - Returns the host adapter name
/**
* aac_get_driver_ident
- * @devtype: index into lookup table
+ * @devtype: index into lookup table
*
- * Returns a pointer to the entry in the driver lookup table.
+ * Returns a pointer to the entry in the driver lookup table.
*/
struct aac_driver_ident* aac_get_driver_ident(int devtype)
* @capacity: the sector capacity of the disk
* @geom: geometry block to fill in
*
- * Return the Heads/Sectors/Cylinders BIOS Disk Parameters for Disk.
- * The default disk geometry is 64 heads, 32 sectors, and the appropriate
- * number of cylinders so as not to exceed drive capacity. In order for
+ * Return the Heads/Sectors/Cylinders BIOS Disk Parameters for Disk.
+ * The default disk geometry is 64 heads, 32 sectors, and the appropriate
+ * number of cylinders so as not to exceed drive capacity. In order for
* disks equal to or larger than 1 GB to be addressable by the BIOS
- * without exceeding the BIOS limitation of 1024 cylinders, Extended
- * Translation should be enabled. With Extended Translation enabled,
- * drives between 1 GB inclusive and 2 GB exclusive are given a disk
- * geometry of 128 heads and 32 sectors, and drives above 2 GB inclusive
- * are given a disk geometry of 255 heads and 63 sectors. However, if
- * the BIOS detects that the Extended Translation setting does not match
- * the geometry in the partition table, then the translation inferred
- * from the partition table will be used by the BIOS, and a warning may
+ * without exceeding the BIOS limitation of 1024 cylinders, Extended
+ * Translation should be enabled. With Extended Translation enabled,
+ * drives between 1 GB inclusive and 2 GB exclusive are given a disk
+ * geometry of 128 heads and 32 sectors, and drives above 2 GB inclusive
+ * are given a disk geometry of 255 heads and 63 sectors. However, if
+ * the BIOS detects that the Extended Translation setting does not match
+ * the geometry in the partition table, then the translation inferred
+ * from the partition table will be used by the BIOS, and a warning may
* be displayed.
*/
-
+
static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int *geom)
{
param->cylinders = cap_to_cyls(capacity, param->heads * param->sectors);
- /*
+ /*
* Read the first 1024 bytes from the disk device, if the boot
* sector partition table is valid, search for a partition table
- * entry whose end_head matches one of the standard geometry
+ * entry whose end_head matches one of the standard geometry
* translations ( 64/32, 128/32, 255/63 ).
*/
buf = scsi_bios_ptable(bdev);
struct aac_dev *aac = (struct aac_dev *)sdev->host->hostdata;
if ((sdev->type == TYPE_DISK) &&
(sdev_channel(sdev) != CONTAINER_CHANNEL) &&
+ (!aac->jbod || sdev->inq_periph_qual) &&
(!aac->raid_scsi_mode || (sdev_channel(sdev) != 2))) {
if (expose_physicals == 0)
return -ENXIO;
sdev->no_uld_attach = 1;
}
if (sdev->tagged_supported && (sdev->type == TYPE_DISK) &&
- (sdev_channel(sdev) == CONTAINER_CHANNEL)) {
+ (!aac->raid_scsi_mode || (sdev_channel(sdev) != 2)) &&
+ !sdev->no_uld_attach) {
struct scsi_device * dev;
struct Scsi_Host *host = sdev->host;
unsigned num_lsu = 0;
++num_lsu;
__shost_for_each_device(dev, host) {
if (dev->tagged_supported && (dev->type == TYPE_DISK) &&
- (sdev_channel(dev) == CONTAINER_CHANNEL)) {
- if (!aac->fsa_dev[sdev_id(dev)].valid)
+ (!aac->raid_scsi_mode ||
+ (sdev_channel(sdev) != 2)) &&
+ !dev->no_uld_attach) {
+ if ((sdev_channel(dev) != CONTAINER_CHANNEL)
+ || !aac->fsa_dev[sdev_id(dev)].valid)
++num_lsu;
} else
++num_one;
else if (depth < 2)
depth = 2;
scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
- if (!(((struct aac_dev *)host->hostdata)->adapter_info.options &
- AAC_OPT_NEW_COMM))
- blk_queue_max_segment_size(sdev->request_queue, 65536);
} else
scsi_adjust_queue_depth(sdev, 0, 1);
static ssize_t aac_show_raid_level(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct scsi_device * sdev = to_scsi_device(dev);
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct aac_dev *aac = (struct aac_dev *)(sdev->host->hostdata);
if (sdev_channel(sdev) != CONTAINER_CHANNEL)
return snprintf(buf, PAGE_SIZE, sdev->no_uld_attach
- ? "Hidden\n" : "JBOD");
+ ? "Hidden\n" :
+ ((aac->jbod && (sdev->type == TYPE_DISK)) ? "JBOD\n" : ""));
return snprintf(buf, PAGE_SIZE, "%s\n",
- get_container_type(((struct aac_dev *)(sdev->host->hostdata))
- ->fsa_dev[sdev_id(sdev)].type));
+ get_container_type(aac->fsa_dev[sdev_id(sdev)].type));
}
static struct device_attribute aac_raid_level_attr = {
static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
{
struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
+ if (!capable(CAP_SYS_RAWIO))
+ return -EPERM;
return aac_do_ioctl(dev, cmd, arg);
}
cmd->SCp.phase = AAC_OWNER_ERROR_HANDLER;
}
}
- printk(KERN_ERR "%s: Host adapter reset request. SCSI hang ?\n",
+ printk(KERN_ERR "%s: Host adapter reset request. SCSI hang ?\n",
AAC_DRIVERNAME);
if ((count = aac_check_health(aac)))
AAC_OPTION_MU_RESET) &&
aac_check_reset &&
((aac_check_reset != 1) ||
- (aac->supplement_adapter_info.SupportedOptions2 &
+ !(aac->supplement_adapter_info.SupportedOptions2 &
AAC_OPTION_IGNORE_RESET)))
aac_reset_adapter(aac, 2); /* Bypass wait for command quiesce */
return SUCCESS; /* Cause an immediate retry of the command with a ten second delay after successful tur */
* Bugs: Needs locking against parallel ioctls lower down
* Bugs: Needs to handle hot plugging
*/
-
-static int aac_cfg_ioctl(struct inode *inode, struct file *file,
+
+static int aac_cfg_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
if (!capable(CAP_SYS_RAWIO))
{
long ret;
lock_kernel();
- switch (cmd) {
+ switch (cmd) {
case FSACTL_MINIPORT_REV_CHECK:
case FSACTL_SENDFIB:
case FSACTL_OPEN_GET_ADAPTER_FIB:
case FSACTL_QUERY_DISK:
case FSACTL_DELETE_DISK:
case FSACTL_FORCE_DELETE_DISK:
- case FSACTL_GET_CONTAINERS:
+ case FSACTL_GET_CONTAINERS:
case FSACTL_SEND_LARGE_FIB:
ret = aac_do_ioctl(dev, cmd, (void __user *)arg);
break;
case FSACTL_GET_NEXT_ADAPTER_FIB: {
struct fib_ioctl __user *f;
-
+
f = compat_alloc_user_space(sizeof(*f));
ret = 0;
if (clear_user(f, sizeof(*f)))
}
default:
- ret = -ENOIOCTLCMD;
+ ret = -ENOIOCTLCMD;
break;
- }
+ }
unlock_kernel();
return ret;
}
}
#endif
-static ssize_t aac_show_model(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_model(struct device *device,
+ struct device_attribute *attr, char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len;
if (dev->supplement_adapter_info.AdapterTypeText[0]) {
return len;
}
-static ssize_t aac_show_vendor(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_vendor(struct device *device,
+ struct device_attribute *attr, char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len;
if (dev->supplement_adapter_info.AdapterTypeText[0]) {
return len;
}
-static ssize_t aac_show_kernel_version(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_flags(struct device *cdev,
+ struct device_attribute *attr, char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ int len = 0;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(cdev)->hostdata;
+
+ if (nblank(dprintk(x)))
+ len = snprintf(buf, PAGE_SIZE, "dprintk\n");
+#ifdef AAC_DETAILED_STATUS_INFO
+ len += snprintf(buf + len, PAGE_SIZE - len,
+ "AAC_DETAILED_STATUS_INFO\n");
+#endif
+ if (dev->raw_io_interface && dev->raw_io_64)
+ len += snprintf(buf + len, PAGE_SIZE - len,
+ "SAI_READ_CAPACITY_16\n");
+ if (dev->jbod)
+ len += snprintf(buf + len, PAGE_SIZE - len, "SUPPORTED_JBOD\n");
+ return len;
+}
+
+static ssize_t aac_show_kernel_version(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len, tmp;
tmp = le32_to_cpu(dev->adapter_info.kernelrev);
- len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
+ len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
le32_to_cpu(dev->adapter_info.kernelbuild));
return len;
}
-static ssize_t aac_show_monitor_version(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_monitor_version(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len, tmp;
tmp = le32_to_cpu(dev->adapter_info.monitorrev);
- len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
+ len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
le32_to_cpu(dev->adapter_info.monitorbuild));
return len;
}
-static ssize_t aac_show_bios_version(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_bios_version(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len, tmp;
tmp = le32_to_cpu(dev->adapter_info.biosrev);
- len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
+ len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
le32_to_cpu(dev->adapter_info.biosbuild));
return len;
}
-ssize_t aac_show_serial_number(struct class_device *class_dev, char *buf)
+ssize_t aac_show_serial_number(struct device *device,
+ struct device_attribute *attr, char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len = 0;
if (le32_to_cpu(dev->adapter_info.serial[0]) != 0xBAD0)
le32_to_cpu(dev->adapter_info.serial[0]));
if (len &&
!memcmp(&dev->supplement_adapter_info.MfgPcbaSerialNo[
- sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo)+2-len],
- buf, len))
+ sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo)-len],
+ buf, len-1))
len = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo),
dev->supplement_adapter_info.MfgPcbaSerialNo);
return len;
}
-static ssize_t aac_show_max_channel(struct class_device *class_dev, char *buf)
+static ssize_t aac_show_max_channel(struct device *device,
+ struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n",
- class_to_shost(class_dev)->max_channel);
+ class_to_shost(device)->max_channel);
}
-static ssize_t aac_show_max_id(struct class_device *class_dev, char *buf)
+static ssize_t aac_show_max_id(struct device *device,
+ struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n",
- class_to_shost(class_dev)->max_id);
+ class_to_shost(device)->max_id);
}
-static ssize_t aac_store_reset_adapter(struct class_device *class_dev,
- const char *buf, size_t count)
+static ssize_t aac_store_reset_adapter(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
int retval = -EACCES;
if (!capable(CAP_SYS_ADMIN))
return retval;
- retval = aac_reset_adapter((struct aac_dev*)class_to_shost(class_dev)->hostdata, buf[0] == '!');
+ retval = aac_reset_adapter((struct aac_dev*)class_to_shost(device)->hostdata, buf[0] == '!');
if (retval >= 0)
retval = count;
return retval;
}
-static ssize_t aac_show_reset_adapter(struct class_device *class_dev,
- char *buf)
+static ssize_t aac_show_reset_adapter(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
{
- struct aac_dev *dev = (struct aac_dev*)class_to_shost(class_dev)->hostdata;
+ struct aac_dev *dev = (struct aac_dev*)class_to_shost(device)->hostdata;
int len, tmp;
tmp = aac_adapter_check_health(dev);
return len;
}
-static struct class_device_attribute aac_model = {
+static struct device_attribute aac_model = {
.attr = {
.name = "model",
.mode = S_IRUGO,
},
.show = aac_show_model,
};
-static struct class_device_attribute aac_vendor = {
+static struct device_attribute aac_vendor = {
.attr = {
.name = "vendor",
.mode = S_IRUGO,
},
.show = aac_show_vendor,
};
-static struct class_device_attribute aac_kernel_version = {
+static struct device_attribute aac_flags = {
+ .attr = {
+ .name = "flags",
+ .mode = S_IRUGO,
+ },
+ .show = aac_show_flags,
+};
+static struct device_attribute aac_kernel_version = {
.attr = {
.name = "hba_kernel_version",
.mode = S_IRUGO,
},
.show = aac_show_kernel_version,
};
-static struct class_device_attribute aac_monitor_version = {
+static struct device_attribute aac_monitor_version = {
.attr = {
.name = "hba_monitor_version",
.mode = S_IRUGO,
},
.show = aac_show_monitor_version,
};
-static struct class_device_attribute aac_bios_version = {
+static struct device_attribute aac_bios_version = {
.attr = {
.name = "hba_bios_version",
.mode = S_IRUGO,
},
.show = aac_show_bios_version,
};
-static struct class_device_attribute aac_serial_number = {
+static struct device_attribute aac_serial_number = {
.attr = {
.name = "serial_number",
.mode = S_IRUGO,
},
.show = aac_show_serial_number,
};
-static struct class_device_attribute aac_max_channel = {
+static struct device_attribute aac_max_channel = {
.attr = {
.name = "max_channel",
.mode = S_IRUGO,
},
.show = aac_show_max_channel,
};
-static struct class_device_attribute aac_max_id = {
+static struct device_attribute aac_max_id = {
.attr = {
.name = "max_id",
.mode = S_IRUGO,
},
.show = aac_show_max_id,
};
-static struct class_device_attribute aac_reset = {
+static struct device_attribute aac_reset = {
.attr = {
.name = "reset_host",
.mode = S_IWUSR|S_IRUGO,
.show = aac_show_reset_adapter,
};
-static struct class_device_attribute *aac_attrs[] = {
+static struct device_attribute *aac_attrs[] = {
&aac_model,
&aac_vendor,
+ &aac_flags,
&aac_kernel_version,
&aac_monitor_version,
&aac_bios_version,
NULL
};
+ssize_t aac_get_serial_number(struct device *device, char *buf)
+{
+ return aac_show_serial_number(device, &aac_serial_number, buf);
+}
static const struct file_operations aac_cfg_fops = {
.owner = THIS_MODULE,
static struct scsi_host_template aac_driver_template = {
.module = THIS_MODULE,
- .name = "AAC",
+ .name = "AAC",
.proc_name = AAC_DRIVERNAME,
- .info = aac_info,
- .ioctl = aac_ioctl,
+ .info = aac_info,
+ .ioctl = aac_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = aac_compat_ioctl,
#endif
- .queuecommand = aac_queuecommand,
- .bios_param = aac_biosparm,
+ .queuecommand = aac_queuecommand,
+ .bios_param = aac_biosparm,
.shost_attrs = aac_attrs,
.slave_configure = aac_slave_configure,
.change_queue_depth = aac_change_queue_depth,
.sdev_attrs = aac_dev_attrs,
.eh_abort_handler = aac_eh_abort,
.eh_host_reset_handler = aac_eh_reset,
- .can_queue = AAC_NUM_IO_FIB,
- .this_id = MAXIMUM_NUM_CONTAINERS,
- .sg_tablesize = 16,
- .max_sectors = 128,
+ .can_queue = AAC_NUM_IO_FIB,
+ .this_id = MAXIMUM_NUM_CONTAINERS,
+ .sg_tablesize = 16,
+ .max_sectors = 128,
#if (AAC_NUM_IO_FIB > 256)
.cmd_per_lun = 256,
-#else
- .cmd_per_lun = AAC_NUM_IO_FIB,
-#endif
+#else
+ .cmd_per_lun = AAC_NUM_IO_FIB,
+#endif
.use_clustering = ENABLE_CLUSTERING,
- .use_sg_chaining = ENABLE_SG_CHAINING,
- .emulated = 1,
+ .emulated = 1,
};
static void __aac_shutdown(struct aac_dev * aac)
aac_send_shutdown(aac);
aac_adapter_disable_int(aac);
free_irq(aac->pdev->irq, aac);
+ if (aac->msi)
+ pci_disable_msi(aac->pdev);
}
static int __devinit aac_probe_one(struct pci_dev *pdev,
goto out;
error = -ENODEV;
- if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) ||
+ if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) ||
pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))
goto out_disable_pdev;
/*
* If the quirk31 bit is set, the adapter needs adapter
* to driver communication memory to be allocated below 2gig
*/
- if (aac_drivers[index].quirks & AAC_QUIRK_31BIT)
+ if (aac_drivers[index].quirks & AAC_QUIRK_31BIT)
if (pci_set_dma_mask(pdev, DMA_31BIT_MASK) ||
pci_set_consistent_dma_mask(pdev, DMA_31BIT_MASK))
goto out_disable_pdev;
-
+
pci_set_master(pdev);
shost = scsi_host_alloc(&aac_driver_template, sizeof(struct aac_dev));
shost->max_cmd_len = 16;
aac = (struct aac_dev *)shost->hostdata;
- aac->scsi_host_ptr = shost;
+ aac->scsi_host_ptr = shost;
aac->pdev = pdev;
aac->name = aac_driver_template.name;
aac->id = shost->unique_id;
if (aac_drivers[index].quirks & AAC_QUIRK_31BIT)
if (pci_set_dma_mask(pdev, DMA_32BIT_MASK))
goto out_deinit;
-
+
aac->maximum_num_channels = aac_drivers[index].channels;
error = aac_get_adapter_info(aac);
if (error < 0)
/*
* Lets override negotiations and drop the maximum SG limit to 34
*/
- if ((aac_drivers[index].quirks & AAC_QUIRK_34SG) &&
- (aac->scsi_host_ptr->sg_tablesize > 34)) {
- aac->scsi_host_ptr->sg_tablesize = 34;
- aac->scsi_host_ptr->max_sectors
- = (aac->scsi_host_ptr->sg_tablesize * 8) + 112;
+ if ((aac_drivers[index].quirks & AAC_QUIRK_34SG) &&
+ (shost->sg_tablesize > 34)) {
+ shost->sg_tablesize = 34;
+ shost->max_sectors = (shost->sg_tablesize * 8) + 112;
}
if ((aac_drivers[index].quirks & AAC_QUIRK_17SG) &&
- (aac->scsi_host_ptr->sg_tablesize > 17)) {
- aac->scsi_host_ptr->sg_tablesize = 17;
- aac->scsi_host_ptr->max_sectors
- = (aac->scsi_host_ptr->sg_tablesize * 8) + 112;
+ (shost->sg_tablesize > 17)) {
+ shost->sg_tablesize = 17;
+ shost->max_sectors = (shost->sg_tablesize * 8) + 112;
}
+ error = pci_set_dma_max_seg_size(pdev,
+ (aac->adapter_info.options & AAC_OPT_NEW_COMM) ?
+ (shost->max_sectors << 9) : 65536);
+ if (error)
+ goto out_deinit;
+
/*
- * Firware printf works only with older firmware.
+ * Firmware printf works only with older firmware.
*/
- if (aac_drivers[index].quirks & AAC_QUIRK_34SG)
+ if (aac_drivers[index].quirks & AAC_QUIRK_34SG)
aac->printf_enabled = 1;
else
aac->printf_enabled = 0;
-
+
/*
* max channel will be the physical channels plus 1 virtual channel
* all containers are on the virtual channel 0 (CONTAINER_CHANNEL)
* physical channels are address by their actual physical number+1
*/
- if ((aac->nondasd_support == 1) || expose_physicals)
+ if (aac->nondasd_support || expose_physicals || aac->jbod)
shost->max_channel = aac->maximum_num_channels;
else
shost->max_channel = 0;
kfree(aac->queues);
aac_adapter_ioremap(aac, 0);
-
+
kfree(aac->fibs);
kfree(aac->fsa_dev);
-
+
list_del(&aac->entry);
scsi_host_put(shost);
pci_disable_device(pdev);
.id_table = aac_pci_tbl,
.probe = aac_probe_one,
.remove = __devexit_p(aac_remove_one),
- .shutdown = aac_shutdown,
+ .shutdown = aac_shutdown,
};
static int __init aac_init(void)
{
int error;
-
+
printk(KERN_INFO "Adaptec %s driver %s\n",
AAC_DRIVERNAME, aac_driver_version);
aac_cfg_major = register_chrdev( 0, "aac", &aac_cfg_fops);
if (aac_cfg_major < 0) {
printk(KERN_WARNING
- "aacraid: unable to register \"aac\" device.\n");
+ "aacraid: unable to register \"aac\" device.\n");
}
return 0;