summaryrefslogtreecommitdiff
path: root/net/9p
diff options
context:
space:
mode:
Diffstat (limited to 'net/9p')
-rw-r--r--net/9p/trans_virtio.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 026775ad391a..afde1a89fbb3 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -220,6 +220,20 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
return 0;
}
+static ssize_t p9_mount_tag_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct virtio_chan *chan;
+ struct virtio_device *vdev;
+
+ vdev = dev_to_virtio(dev);
+ chan = vdev->priv;
+
+ return snprintf(buf, chan->tag_len + 1, "%s", chan->tag);
+}
+
+static DEVICE_ATTR(mount_tag, 0444, p9_mount_tag_show, NULL);
+
/**
* p9_virtio_probe - probe for existence of 9P virtio channels
* @vdev: virtio device to probe
@@ -273,6 +287,11 @@ static int p9_virtio_probe(struct virtio_device *vdev)
tag, tag_len);
chan->tag = tag;
chan->tag_len = tag_len;
+ err = sysfs_create_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
+ if (err) {
+ kfree(tag);
+ goto out_free_vq;
+ }
mutex_lock(&virtio_9p_lock);
list_add_tail(&chan->chan_list, &virtio_chan_list);
mutex_unlock(&virtio_9p_lock);
@@ -348,6 +367,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
mutex_lock(&virtio_9p_lock);
list_del(&chan->chan_list);
mutex_unlock(&virtio_9p_lock);
+ sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
kfree(chan->tag);
kfree(chan);