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s390/cio: add util_string sysfs attribute 

Export utility strings as a chpid's binary sysfs attribute.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2016-06-29 19:32:31 +02:00 committed by Martin Schwidefsky
parent fcc6dd4b7b
commit b9dd652499
1 changed files with 23 additions and 0 deletions
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23
drivers/s390/cio/chp.c
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@ -384,6 +384,28 @@ static ssize_t chp_chid_external_show(struct device *dev,
} }
static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL); static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
struct channel_path *chp = to_channelpath(kobj_to_dev(kobj));
ssize_t rc;
mutex_lock(&chp->lock);
rc = memory_read_from_buffer(buf, count, &off, chp->desc_fmt3.util_str,
sizeof(chp->desc_fmt3.util_str));
mutex_unlock(&chp->lock);
return rc;
}
static BIN_ATTR_RO(util_string,
sizeof(((struct channel_path_desc_fmt3 *)0)->util_str));
static struct bin_attribute *chp_bin_attrs[] = {
&bin_attr_util_string,
NULL,
};
static struct attribute *chp_attrs[] = { static struct attribute *chp_attrs[] = {
&dev_attr_status.attr, &dev_attr_status.attr,
&dev_attr_configure.attr, &dev_attr_configure.attr,
@ -396,6 +418,7 @@ static struct attribute *chp_attrs[] = {
}; };
static struct attribute_group chp_attr_group = { static struct attribute_group chp_attr_group = {
.attrs = chp_attrs, .attrs = chp_attrs,
.bin_attrs = chp_bin_attrs,
}; };
static const struct attribute_group *chp_attr_groups[] = { static const struct attribute_group *chp_attr_groups[] = {
&chp_attr_group, &chp_attr_group,