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-rw-r--r--drivers/scsi/sd.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 9f7fc39891b8..e04c302fa4f7 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -262,6 +262,28 @@ sd_show_protection_type(struct device *dev, struct device_attribute *attr,
262} 262}
263 263
264static ssize_t 264static ssize_t
265sd_store_protection_type(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267{
268 struct scsi_disk *sdkp = to_scsi_disk(dev);
269 unsigned int val;
270 int err;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EACCES;
274
275 err = kstrtouint(buf, 10, &val);
276
277 if (err)
278 return err;
279
280 if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION)
281 sdkp->protection_type = val;
282
283 return count;
284}
285
286static ssize_t
265sd_show_protection_mode(struct device *dev, struct device_attribute *attr, 287sd_show_protection_mode(struct device *dev, struct device_attribute *attr,
266 char *buf) 288 char *buf)
267{ 289{
@@ -381,7 +403,8 @@ static struct device_attribute sd_disk_attrs[] = {
381 sd_store_allow_restart), 403 sd_store_allow_restart),
382 __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, 404 __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop,
383 sd_store_manage_start_stop), 405 sd_store_manage_start_stop),
384 __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), 406 __ATTR(protection_type, S_IRUGO|S_IWUSR, sd_show_protection_type,
407 sd_store_protection_type),
385 __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), 408 __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL),
386 __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), 409 __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL),
387 __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), 410 __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL),