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-rw-r--r--drivers/scsi/scsi.c87
-rw-r--r--drivers/scsi/scsi_scan.c3
-rw-r--r--drivers/scsi/scsi_sysfs.c34
3 files changed, 123 insertions, 1 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index b2526ad7b9a1..1d98ac960887 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -1030,6 +1030,93 @@ int scsi_get_vpd_page(struct scsi_device *sdev, u8 page, unsigned char *buf,
EXPORT_SYMBOL_GPL(scsi_get_vpd_page);
/**
+ * scsi_attach_vpd - Attach Vital Product Data to a SCSI device structure
+ * @sdev: The device to ask
+ *
+ * Attach the 'Device Identification' VPD page (0x83) and the
+ * 'Unit Serial Number' VPD page (0x80) to a SCSI device
+ * structure. This information can be used to identify the device
+ * uniquely.
+ */
+void scsi_attach_vpd(struct scsi_device *sdev)
+{
+ int result, i;
+ int vpd_len = SCSI_VPD_PG_LEN;
+ int pg80_supported = 0;
+ int pg83_supported = 0;
+ unsigned char *vpd_buf;
+
+ if (sdev->skip_vpd_pages)
+ return;
+retry_pg0:
+ vpd_buf = kmalloc(vpd_len, GFP_KERNEL);
+ if (!vpd_buf)
+ return;
+
+ /* Ask for all the pages supported by this device */
+ result = scsi_vpd_inquiry(sdev, vpd_buf, 0, vpd_len);
+ if (result < 0) {
+ kfree(vpd_buf);
+ return;
+ }
+ if (result > vpd_len) {
+ vpd_len = result;
+ kfree(vpd_buf);
+ goto retry_pg0;
+ }
+
+ for (i = 4; i < result; i++) {
+ if (vpd_buf[i] == 0x80)
+ pg80_supported = 1;
+ if (vpd_buf[i] == 0x83)
+ pg83_supported = 1;
+ }
+ kfree(vpd_buf);
+ vpd_len = SCSI_VPD_PG_LEN;
+
+ if (pg80_supported) {
+retry_pg80:
+ vpd_buf = kmalloc(vpd_len, GFP_KERNEL);
+ if (!vpd_buf)
+ return;
+
+ result = scsi_vpd_inquiry(sdev, vpd_buf, 0x80, vpd_len);
+ if (result < 0) {
+ kfree(vpd_buf);
+ return;
+ }
+ if (result > vpd_len) {
+ vpd_len = result;
+ kfree(vpd_buf);
+ goto retry_pg80;
+ }
+ sdev->vpd_pg80_len = result;
+ sdev->vpd_pg80 = vpd_buf;
+ vpd_len = SCSI_VPD_PG_LEN;
+ }
+
+ if (pg83_supported) {
+retry_pg83:
+ vpd_buf = kmalloc(vpd_len, GFP_KERNEL);
+ if (!vpd_buf)
+ return;
+
+ result = scsi_vpd_inquiry(sdev, vpd_buf, 0x83, vpd_len);
+ if (result < 0) {
+ kfree(vpd_buf);
+ return;
+ }
+ if (result > vpd_len) {
+ vpd_len = result;
+ kfree(vpd_buf);
+ goto retry_pg83;
+ }
+ sdev->vpd_pg83_len = result;
+ sdev->vpd_pg83 = vpd_buf;
+ }
+}
+
+/**
* scsi_report_opcode - Find out if a given command opcode is supported
* @sdev: scsi device to query
* @buffer: scratch buffer (must be at least 20 bytes long)
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 4109530e92a0..27f96d5b7680 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -970,6 +970,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
}
}
+ if (sdev->scsi_level >= SCSI_3)
+ scsi_attach_vpd(sdev);
+
sdev->max_queue_depth = sdev->queue_depth;
/*
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 85098222a9e8..1392474c3499 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -412,6 +412,8 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
/* NULL queue means the device can't be used */
sdev->request_queue = NULL;
+ kfree(sdev->vpd_pg83);
+ kfree(sdev->vpd_pg80);
kfree(sdev->inquiry);
kfree(sdev);
@@ -751,8 +753,32 @@ store_queue_type_field(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
store_queue_type_field);
+#define sdev_vpd_pg_attr(_page) \
+static ssize_t \
+show_vpd_##_page(struct file *filp, struct kobject *kobj, \
+ struct bin_attribute *bin_attr, \
+ char *buf, loff_t off, size_t count) \
+{ \
+ struct device *dev = container_of(kobj, struct device, kobj); \
+ struct scsi_device *sdev = to_scsi_device(dev); \
+ if (!sdev->vpd_##_page) \
+ return -EINVAL; \
+ return memory_read_from_buffer(buf, count, &off, \
+ sdev->vpd_##_page, \
+ sdev->vpd_##_page##_len); \
+} \
+static struct bin_attribute dev_attr_vpd_##_page = { \
+ .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
+ .size = 0, \
+ .read = show_vpd_##_page, \
+};
+
+sdev_vpd_pg_attr(pg83);
+sdev_vpd_pg_attr(pg80);
+
static ssize_t
-show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
+show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
}
@@ -936,8 +962,14 @@ static struct attribute *scsi_sdev_attrs[] = {
NULL
};
+static struct bin_attribute *scsi_sdev_bin_attrs[] = {
+ &dev_attr_vpd_pg83,
+ &dev_attr_vpd_pg80,
+ NULL
+};
static struct attribute_group scsi_sdev_attr_group = {
.attrs = scsi_sdev_attrs,
+ .bin_attrs = scsi_sdev_bin_attrs,
.is_visible = scsi_sdev_attr_is_visible,
};