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scsi: core: Add sysfs attributes for VPD pages 0h and 89h 

Add sysfs attributes for the ATA information page and Supported VPD Pages
page.

Link: https://lore.kernel.org/r/20190926162216.56591-1-ryanattard@ryanattard.info
Signed-off-by: Ryan Attard <ryanattard@ryanattard.info>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ryan Attard 2019-09-26 11:22:17 -05:00 committed by Martin K. Petersen
parent 9e322310e1
commit d188b0675b
3 changed files with 25 additions and 0 deletions
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4
drivers/scsi/scsi.c
View File

@ -465,10 +465,14 @@ void scsi_attach_vpd(struct scsi_device *sdev)
return;
for (i = 4; i < vpd_buf->len; i++) {
if (vpd_buf->data[i] == 0x0)
scsi_update_vpd_page(sdev, 0x0, &sdev->vpd_pg0);
if (vpd_buf->data[i] == 0x80)
scsi_update_vpd_page(sdev, 0x80, &sdev->vpd_pg80);
if (vpd_buf->data[i] == 0x83)
scsi_update_vpd_page(sdev, 0x83, &sdev->vpd_pg83);
if (vpd_buf->data[i] == 0x89)
scsi_update_vpd_page(sdev, 0x89, &sdev->vpd_pg89);
}
kfree(vpd_buf);
}

19
drivers/scsi/scsi_sysfs.c
View File

@ -437,6 +437,7 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
struct device *parent;
struct list_head *this, *tmp;
struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL;
struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL;
unsigned long flags;
sdev = container_of(work, struct scsi_device, ew.work);
@ -466,16 +467,24 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
sdev->request_queue = NULL;
mutex_lock(&sdev->inquiry_mutex);
rcu_swap_protected(sdev->vpd_pg0, vpd_pg0,
lockdep_is_held(&sdev->inquiry_mutex));
rcu_swap_protected(sdev->vpd_pg80, vpd_pg80,
lockdep_is_held(&sdev->inquiry_mutex));
rcu_swap_protected(sdev->vpd_pg83, vpd_pg83,
lockdep_is_held(&sdev->inquiry_mutex));
rcu_swap_protected(sdev->vpd_pg89, vpd_pg89,
lockdep_is_held(&sdev->inquiry_mutex));
mutex_unlock(&sdev->inquiry_mutex);
if (vpd_pg0)
kfree_rcu(vpd_pg0, rcu);
if (vpd_pg83)
kfree_rcu(vpd_pg83, rcu);
if (vpd_pg80)
kfree_rcu(vpd_pg80, rcu);
if (vpd_pg89)
kfree_rcu(vpd_pg89, rcu);
kfree(sdev->inquiry);
kfree(sdev);
@ -859,6 +868,8 @@ static struct bin_attribute dev_attr_vpd_##_page = { \
sdev_vpd_pg_attr(pg83);
sdev_vpd_pg_attr(pg80);
sdev_vpd_pg_attr(pg89);
sdev_vpd_pg_attr(pg0);
static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
struct bin_attribute *bin_attr,
@ -1191,12 +1202,18 @@ static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj,
struct scsi_device *sdev = to_scsi_device(dev);
if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0)
return 0;
if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
return 0;
if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83)
return 0;
if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89)
return 0;
return S_IRUGO;
}
@ -1239,8 +1256,10 @@ static struct attribute *scsi_sdev_attrs[] = {
};
static struct bin_attribute *scsi_sdev_bin_attrs[] = {
&dev_attr_vpd_pg0,
&dev_attr_vpd_pg83,
&dev_attr_vpd_pg80,
&dev_attr_vpd_pg89,
&dev_attr_inquiry,
NULL
};

2
include/scsi/scsi_device.h
View File

@ -140,8 +140,10 @@ struct scsi_device {
const char * rev; /* ... "nullnullnullnull" before scan */
#define SCSI_VPD_PG_LEN 255
struct scsi_vpd __rcu *vpd_pg0;
struct scsi_vpd __rcu *vpd_pg83;
struct scsi_vpd __rcu *vpd_pg80;
struct scsi_vpd __rcu *vpd_pg89;
unsigned char current_tag; /* current tag */
struct scsi_target *sdev_target; /* used only for single_lun */