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scsi: Export SCSI Inquiry data to sysfs

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Export the RAW SCSI Inquiry to sysfs as binfile. This way the data can be used
by userland without the need to have and ioctl or use the sg_inq tool.

Here is an example of the provided data

linux:~ # hexdump /sys/class/scsi_device/1\:0\:0\:0/device/inquiry
0000000 8005 3205 001f 0000 4551 554d 2020 2020
0000010 4551 554d 4420 4456 522d 4d4f 2020 2020
0000020 2e32 2e33
0000024

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Johannes Thumshirn 2015-11-09 10:56:57 +01:00 committed by Martin K. Petersen
parent 9fb74c4e66
commit 92e6246c8e
1 changed files with 24 additions and 0 deletions
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24
drivers/scsi/scsi_sysfs.c
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@ -773,6 +773,29 @@ static struct bin_attribute dev_attr_vpd_##_page = { \
sdev_vpd_pg_attr(pg83);
sdev_vpd_pg_attr(pg80);
static ssize_t show_inquiry(struct file *filep, 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->inquiry)
return -EINVAL;
return memory_read_from_buffer(buf, count, &off, sdev->inquiry,
sdev->inquiry_len);
}
static struct bin_attribute dev_attr_inquiry = {
.attr = {
.name = "inquiry",
.mode = S_IRUGO,
},
.size = 0,
.read = show_inquiry,
};
static ssize_t
show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
char *buf)
@ -957,6 +980,7 @@ static struct attribute *scsi_sdev_attrs[] = {
static struct bin_attribute *scsi_sdev_bin_attrs[] = {
&dev_attr_vpd_pg83,
&dev_attr_vpd_pg80,
&dev_attr_inquiry,
NULL
};
static struct attribute_group scsi_sdev_attr_group = {