From 92e6246c8e02f4ce9960731e2411e49c1f0fabbf Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Mon, 9 Nov 2015 10:56:57 +0100 Subject: [PATCH] scsi: Export SCSI Inquiry data to sysfs 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 Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi_sysfs.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index b333389f248f..fdcf0abe613f 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -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 = { -- 2.20.1