Commit 345e2960 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Martin K. Petersen
Browse files

scsi: scsi: Export blacklist flags to sysfs 



Each scsi device is scanned according to the found blacklist flags, but
this information is never presented to sysfs.  This makes it quite hard
to figure out if blacklisting worked as expected.  With this patch we're
exporting an additional attribute 'blacklist' containing the blacklist
flags for this device.

Signed-off-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarBart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent e5203cf0

drivers/scsi/Makefile

+8 −0
Original line number Diff line number Diff line
@@ -191,6 +191,14 @@ clean-files := 53c700_d.h 53c700_u.h 


$(obj)/53c700.o $(MODVERDIR)/$(obj)/53c700.ver: $(obj)/53c700_d.h



$(obj)/scsi_sysfs.o: $(obj)/scsi_devinfo_tbl.c



quiet_cmd_bflags = GEN     $@

	cmd_bflags = sed -n 's/.*BLIST_\([A-Z0-9_]*\) *.*/BLIST_FLAG_NAME(\1),/p' $< > $@



$(obj)/scsi_devinfo_tbl.c: include/scsi/scsi_devinfo.h

	$(call if_changed,bflags)



# If you want to play with the firmware, uncomment

# GENERATE_FIRMWARE := 1

drivers/scsi/scsi_scan.c

+1 −0
Original line number Diff line number Diff line
@@ -984,6 +984,7 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, 
		scsi_attach_vpd(sdev);



	sdev->max_queue_depth = sdev->queue_depth;

	sdev->sdev_bflags = *bflags;



	/*

	 * Ok, the device is now all set up, we can

drivers/scsi/scsi_sysfs.c

+37 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <scsi/scsi_dh.h>

#include <scsi/scsi_transport.h>

#include <scsi/scsi_driver.h>

#include <scsi/scsi_devinfo.h>



#include "scsi_priv.h"

#include "scsi_logging.h"
@@ -966,6 +967,41 @@ sdev_show_wwid(struct device *dev, struct device_attribute *attr, 
}

static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL);



#define BLIST_FLAG_NAME(name) [ilog2(BLIST_##name)] = #name

static const char *const sdev_bflags_name[] = {

#include "scsi_devinfo_tbl.c"

};

#undef BLIST_FLAG_NAME



static ssize_t

sdev_show_blacklist(struct device *dev, struct device_attribute *attr,

		    char *buf)

{

	struct scsi_device *sdev = to_scsi_device(dev);

	int i;

	ssize_t len = 0;



	for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) {

		const char *name = NULL;



		if (!(sdev->sdev_bflags & BIT(i)))

			continue;

		if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i])

			name = sdev_bflags_name[i];



		if (name)

			len += snprintf(buf + len, PAGE_SIZE - len,

					"%s%s", len ? " " : "", name);

		else

			len += snprintf(buf + len, PAGE_SIZE - len,

					"%sINVALID_BIT(%d)", len ? " " : "", i);

	}

	if (len)

		len += snprintf(buf + len, PAGE_SIZE - len, "\n");

	return len;

}

static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL);



#ifdef CONFIG_SCSI_DH

static ssize_t

sdev_show_dh_state(struct device *dev, struct device_attribute *attr,
@@ -1151,6 +1187,7 @@ static struct attribute *scsi_sdev_attrs[] = { 
	&dev_attr_queue_depth.attr,

	&dev_attr_queue_type.attr,

	&dev_attr_wwid.attr,

	&dev_attr_blacklist.attr,

#ifdef CONFIG_SCSI_DH

	&dev_attr_dh_state.attr,

	&dev_attr_access_state.attr,

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