---

yaml
---
r: 221467
b: refs/heads/master
c: 518fa8e
h: refs/heads/master
i:
  221465: 0413725
  221463: 1b57c3c
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 349ed5a060397fcccc542a0314f236b420bd4ad1
+refs/heads/master: 518fa8e39bafd2431c28adb8822bb6c3e4d1a390

trunk/drivers/scsi/sd.c

@@ -258,6 +258,28 @@ sd_show_protection_type(struct device *dev, struct device_attribute *attr,
 	return snprintf(buf, 20, "%u\n", sdkp->protection_type);
 }
 
+static ssize_t
+sd_show_protection_mode(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct scsi_disk *sdkp = to_scsi_disk(dev);
+	struct scsi_device *sdp = sdkp->device;
+	unsigned int dif, dix;
+
+	dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
+	dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
+
+	if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) {
+		dif = 0;
+		dix = 1;
+	}
+
+	if (!dif && !dix)
+		return snprintf(buf, 20, "none\n");
+
+	return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif);
+}
+
 static ssize_t
 sd_show_app_tag_own(struct device *dev, struct device_attribute *attr,
 		    char *buf)
@@ -285,6 +307,7 @@ static struct device_attribute sd_disk_attrs[] = {
 	__ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop,
 	       sd_store_manage_start_stop),
 	__ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL),
+	__ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL),
 	__ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL),
 	__ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL),
 	__ATTR_NULL,