forked from Minki/linux
s390/hvc_iucv: Display connection details through device attributes
Add device attributes to display details about the connection status of HVC IUCV terminals. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -77,6 +77,7 @@ struct hvc_iucv_private {
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struct list_head tty_outqueue; /* outgoing IUCV messages */
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struct list_head tty_inqueue; /* incoming IUCV messages */
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struct device *dev; /* device structure */
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u8 info_path[16]; /* IUCV path info (dev attr) */
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};
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struct iucv_tty_buffer {
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@ -826,6 +827,10 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
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priv->path = path;
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priv->iucv_state = IUCV_CONNECTED;
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/* store path information */
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memcpy(priv->info_path, ipvmid, 8);
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memcpy(priv->info_path + 8, ipuser + 8, 8);
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/* flush buffered output data... */
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schedule_delayed_work(&priv->sndbuf_work, 5);
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@ -960,6 +965,49 @@ static int hvc_iucv_pm_restore_thaw(struct device *dev)
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return 0;
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}
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static ssize_t hvc_iucv_dev_termid_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hvc_iucv_private *priv = dev_get_drvdata(dev);
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size_t len;
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len = sizeof(priv->srv_name);
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memcpy(buf, priv->srv_name, len);
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EBCASC(buf, len);
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buf[len++] = '\n';
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return len;
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}
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static ssize_t hvc_iucv_dev_state_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hvc_iucv_private *priv = dev_get_drvdata(dev);
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return sprintf(buf, "%u:%u\n", priv->iucv_state, priv->tty_state);
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}
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static ssize_t hvc_iucv_dev_peer_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hvc_iucv_private *priv = dev_get_drvdata(dev);
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char vmid[9], ipuser[9];
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memset(vmid, 0, sizeof(vmid));
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memset(ipuser, 0, sizeof(ipuser));
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spin_lock_bh(&priv->lock);
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if (priv->iucv_state == IUCV_CONNECTED) {
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memcpy(vmid, priv->info_path, 8);
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memcpy(ipuser, priv->info_path + 8, 8);
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}
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spin_unlock_bh(&priv->lock);
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EBCASC(ipuser, 8);
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return sprintf(buf, "%s:%s\n", vmid, ipuser);
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}
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/* HVC operations */
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static const struct hv_ops hvc_iucv_ops = {
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@ -985,6 +1033,25 @@ static struct device_driver hvc_iucv_driver = {
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.pm = &hvc_iucv_pm_ops,
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};
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/* IUCV HVC device attributes */
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static DEVICE_ATTR(termid, 0640, hvc_iucv_dev_termid_show, NULL);
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static DEVICE_ATTR(state, 0640, hvc_iucv_dev_state_show, NULL);
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static DEVICE_ATTR(peer, 0640, hvc_iucv_dev_peer_show, NULL);
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static struct attribute *hvc_iucv_dev_attrs[] = {
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&dev_attr_termid.attr,
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&dev_attr_state.attr,
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&dev_attr_peer.attr,
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NULL,
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};
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static struct attribute_group hvc_iucv_dev_attr_group = {
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.attrs = hvc_iucv_dev_attrs,
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};
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static const struct attribute_group *hvc_iucv_dev_attr_groups[] = {
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&hvc_iucv_dev_attr_group,
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NULL,
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};
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/**
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* hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
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* @id: hvc_iucv_table index
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@ -1046,6 +1113,7 @@ static int __init hvc_iucv_alloc(int id, unsigned int is_console)
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priv->dev->bus = &iucv_bus;
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priv->dev->parent = iucv_root;
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priv->dev->driver = &hvc_iucv_driver;
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priv->dev->groups = hvc_iucv_dev_attr_groups;
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priv->dev->release = (void (*)(struct device *)) kfree;
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rc = device_register(priv->dev);
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if (rc) {
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