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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>
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1 changed files with 23 additions and 0 deletions
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@ -384,6 +384,28 @@ static ssize_t chp_chid_external_show(struct device *dev,
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}
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static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
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static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t off, size_t count)
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{
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struct channel_path *chp = to_channelpath(kobj_to_dev(kobj));
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ssize_t rc;
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mutex_lock(&chp->lock);
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rc = memory_read_from_buffer(buf, count, &off, chp->desc_fmt3.util_str,
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sizeof(chp->desc_fmt3.util_str));
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mutex_unlock(&chp->lock);
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return rc;
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}
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static BIN_ATTR_RO(util_string,
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sizeof(((struct channel_path_desc_fmt3 *)0)->util_str));
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static struct bin_attribute *chp_bin_attrs[] = {
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&bin_attr_util_string,
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NULL,
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};
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static struct attribute *chp_attrs[] = {
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&dev_attr_status.attr,
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&dev_attr_configure.attr,
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@ -396,6 +418,7 @@ static struct attribute *chp_attrs[] = {
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};
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static struct attribute_group chp_attr_group = {
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.attrs = chp_attrs,
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.bin_attrs = chp_bin_attrs,
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};
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static const struct attribute_group *chp_attr_groups[] = {
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&chp_attr_group,
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