diff options
Diffstat (limited to 'drivers/s390/block/dasd_devmap.c')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index c7c948c55761..95c7959c7949 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -1518,6 +1518,41 @@ static ssize_t dasd_aq_mask_store(struct device *dev, struct device_attribute *a static DEVICE_ATTR(aq_mask, 0644, dasd_aq_mask_show, dasd_aq_mask_store); /* + * aq_requeue controls if requests are returned to the blocklayer on quiesce + * or if requests are only not started + */ +static ssize_t dasd_aqr_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dasd_devmap *devmap; + int flag; + + devmap = dasd_find_busid(dev_name(dev)); + if (!IS_ERR(devmap)) + flag = (devmap->features & DASD_FEATURE_REQUEUEQUIESCE) != 0; + else + flag = (DASD_FEATURE_DEFAULT & + DASD_FEATURE_REQUEUEQUIESCE) != 0; + return sysfs_emit(buf, "%d\n", flag); +} + +static ssize_t dasd_aqr_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + bool val; + int rc; + + if (kstrtobool(buf, &val)) + return -EINVAL; + + rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_REQUEUEQUIESCE, val); + + return rc ? : count; +} + +static DEVICE_ATTR(aq_requeue, 0644, dasd_aqr_show, dasd_aqr_store); + +/* * expiration time for default requests */ static ssize_t @@ -2367,6 +2402,7 @@ static struct attribute * dasd_attrs[] = { &dev_attr_copy_role.attr, &dev_attr_ping.attr, &dev_attr_aq_mask.attr, + &dev_attr_aq_requeue.attr, NULL, }; |