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authorHannes Reinecke <hare@suse.de>2017-10-02 16:26:34 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2017-10-17 00:57:12 -0400
commit345e29608b4bb4b68c6c30667dda02d51484769e (patch)
tree1681ee62b3ed8b736d27f981f318df301edcc874 /drivers/scsi/scsi_sysfs.c
parente5203cf05282a41642edc55ac504efb8add2b17a (diff)
downloadlinux-345e29608b4bb4b68c6c30667dda02d51484769e.tar.bz2
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: Hannes Reinecke <hare@suse.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index cfc5e316f6cb..e7714547b310 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -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,