>From 849dd255bdd2158cb621697e41448cf6b230d2f4 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Thu, 21 Aug 2014 11:43:24 -0700
Subject: [PATCH 3/5] SES: add enclosure logical id
Export the NAA logical id for the enclosure. This is optionally
available from the sas_transport_class, but it is really a property of
the enclosure.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Song Liu <songliubraving@xxxxxx>
Reviewed-by: Jens Axboe <axboe@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
---
drivers/misc/enclosure.c | 13 +++++++++++++
drivers/scsi/ses.c | 9 +++++++++
include/linux/enclosure.h | 1 +
3 files changed, 23 insertions(+)
diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index 15faf61..18b87de 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -395,8 +395,21 @@ static ssize_t components_show(struct device *cdev,
}
static DEVICE_ATTR_RO(components);
+static ssize_t id_show(struct device *cdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct enclosure_device *edev = to_enclosure_device(cdev);
+
+ if (edev->cb->show_id)
+ return edev->cb->show_id(edev, buf);
+ return -EINVAL;
+}
+static DEVICE_ATTR_RO(id);
+
static struct attribute *enclosure_class_attrs[] = {
&dev_attr_components.attr,
+ &dev_attr_id.attr,
NULL,
};
ATTRIBUTE_GROUPS(enclosure_class);
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 87cf970b..696d5d8 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -258,6 +258,14 @@ static int ses_set_active(struct enclosure_device *edev,
return ses_set_page2_descriptor(edev, ecomp, desc);
}
+static int ses_show_id(struct enclosure_device *edev, char *buf)
+{
+ struct ses_device *ses_dev = edev->scratch;
+ unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4);
+
+ return sprintf(buf, "%#llx\n", id);
+}
+
static struct enclosure_component_callbacks ses_enclosure_callbacks = {
.get_fault = ses_get_fault,
.set_fault = ses_set_fault,
@@ -265,6 +273,7 @@ static struct enclosure_component_callbacks ses_enclosure_callbacks = {
.get_locate = ses_get_locate,
.set_locate = ses_set_locate,
.set_active = ses_set_active,
+ .show_id = ses_show_id,
};
struct ses_host_edev {
diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h
index a835d33..807622b 100644
--- a/include/linux/enclosure.h
+++ b/include/linux/enclosure.h
@@ -79,6 +79,7 @@ struct enclosure_component_callbacks {
int (*set_locate)(struct enclosure_device *,
struct enclosure_component *,
enum enclosure_component_setting);
+ int (*show_id)(struct enclosure_device *, char *buf);
};
--
1.8.1
> -----Original Message-----
> From: Hannes Reinecke [mailto:hare@xxxxxxx]
> Sent: Thursday, September 4, 2014 12:55 AM
> To: Song Liu; linux-scsi@xxxxxxxxxxxxxxx
> Cc: Dan Williams; Jens Axboe
> Subject: Re: [PATCH 3/5] SES: add enclosure logical id
>
> On 08/25/2014 07:34 PM, Song Liu wrote:
> > From: Song Liu [mailto:songliubraving@xxxxxx]
> > Sent: Monday, August 25, 2014 10:26 AM
> > To: Song Liu
> > Cc: Dan Williams; Hannes Reinecke
> > Subject: [PATCH 3/5] SES: add enclosure logical id
> >
> > From: Dan Williams <dan.j.williams@xxxxxxxxx>
> >
> > Export the NAA logical id for the enclosure. This is optionally available
> from the sas_transport_class, but it is really a property of the enclosure.
> >
> > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> > Signed-off-by: Song Liu <songliubraving@xxxxxx>
> > Reviewed-by: Jens Axboe <axboe@xxxxxx>
> > Cc: Hannes Reinecke <hare@xxxxxxx>
> > ---
> > drivers/misc/enclosure.c | 13 +++++++++++++
> > drivers/scsi/ses.c | 9 +++++++++
> > include/linux/enclosure.h | 1 +
> > 3 files changed, 23 insertions(+)
> >
> > diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c index
> > 15faf61..646068a 100644
> > --- a/drivers/misc/enclosure.c
> > +++ b/drivers/misc/enclosure.c
> > @@ -395,8 +395,21 @@ static ssize_t components_show(struct device
> > *cdev, } static DEVICE_ATTR_RO(components);
> >
> > +static ssize_t id_show(struct device *cdev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct enclosure_device *edev = to_enclosure_device(cdev);
> > +
> > + if (edev->cb->show_id)
> > + return edev->cb->show_id(edev, buf);
> > + return 0;
> > +}
> > +static DEVICE_ATTR_RO(id);
> > +
> > static struct attribute *enclosure_class_attrs[] = {
> > &dev_attr_components.attr,
> > + &dev_attr_id.attr,
> > NULL,
> > };
> > ATTRIBUTE_GROUPS(enclosure_class);
>
> Maybe you should return -EINVAL or something here; '0' would mean an
> enclosure id of length '0', which is a different meaning from 'enclosure id not
> available'.
>
> > diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index
> > 8f0a62a..61deb4e 100644
> > --- a/drivers/scsi/ses.c
> > +++ b/drivers/scsi/ses.c
> > @@ -258,6 +258,14 @@ static int ses_set_active(struct enclosure_device
> *edev,
> > return ses_set_page2_descriptor(edev, ecomp, desc); }
> >
> > +static int ses_show_id(struct enclosure_device *edev, char *buf) {
> > + struct ses_device *ses_dev = edev->scratch;
> > + unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4);
> > +
> > + return sprintf(buf, "%#llx\n", id);
> > +}
> > +
> > static struct enclosure_component_callbacks ses_enclosure_callbacks = {
> > .get_fault = ses_get_fault,
> > .set_fault = ses_set_fault,
> > @@ -265,6 +273,7 @@ static struct enclosure_component_callbacks
> ses_enclosure_callbacks = {
> > .get_locate = ses_get_locate,
> > .set_locate = ses_set_locate,
> > .set_active = ses_set_active,
> > + .show_id = ses_show_id,
> > };
> >
> > struct ses_host_edev {
> > diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h
> > index a835d33..807622b 100644
> > --- a/include/linux/enclosure.h
> > +++ b/include/linux/enclosure.h
> > @@ -79,6 +79,7 @@ struct enclosure_component_callbacks {
> > int (*set_locate)(struct enclosure_device *,
> > struct enclosure_component *,
> > enum enclosure_component_setting);
> > + int (*show_id)(struct enclosure_device *, char *buf);
> > };
> >
> >
> > --
> > 1.8.1
> >
> Cheers,
>
> Hannes
> --
> Dr. Hannes Reinecke zSeries & Storage
> hare@xxxxxxx +49 911 74053 688
> SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
> GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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