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authorSebastian Ott <sebott@linux.vnet.ibm.com>2016-06-29 19:32:31 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-03-28 08:38:22 +0200
commitb9dd652499d645707dda2b835a905455e3718157 (patch)
treee8eabede29ac35fbf396dfdbeda38be3944d6210 /drivers/s390/cio
parentfcc6dd4b7b4dfc57ba19f988cfa5ac335de885d5 (diff)
downloadlinux-b9dd652499d645707dda2b835a905455e3718157.tar.bz2
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>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/chp.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index 41ecc08b1cf7..afbdee74147d 100644
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -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 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[] = {
&dev_attr_status.attr,
&dev_attr_configure.attr,
@@ -396,6 +418,7 @@ static struct attribute *chp_attrs[] = {
};
static struct attribute_group chp_attr_group = {
.attrs = chp_attrs,
+ .bin_attrs = chp_bin_attrs,
};
static const struct attribute_group *chp_attr_groups[] = {
&chp_attr_group,