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authorJulian Wiedmann <jwi@linux.ibm.com>2020-05-06 11:09:42 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-07 00:11:26 +0300
commitfb8d258049f70e6bfd4674b11deb566fb13a0839 (patch)
tree19d8f43979b36489a3a0155e79ca4a938b3c1e5e /drivers/s390
parent0d49c06bcfc29042306814a2199b7996dbf1ecb0 (diff)
downloadlinux-fb8d258049f70e6bfd4674b11deb566fb13a0839.tar.xz
s390/qeth: add debugfs file for local IP addresses
For debugging purposes, provide read access to the local_addr caches via debug/qeth/<dev_name>/local_addrs. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core.h2
-rw-r--r--drivers/s390/net/qeth_core_main.c32
2 files changed, 33 insertions, 1 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index b92af3735dd4..3d8b8e0f2438 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -11,6 +11,7 @@
#define __QETH_CORE_H__
#include <linux/completion.h>
+#include <linux/debugfs.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
@@ -797,6 +798,7 @@ struct qeth_card {
struct qeth_channel data;
struct net_device *dev;
+ struct dentry *debugfs;
struct qeth_card_stats stats;
struct qeth_card_info info;
struct qeth_token token;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 6b5d42a4501c..771282cb7aef 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -61,6 +61,7 @@ EXPORT_SYMBOL_GPL(qeth_core_header_cache);
static struct kmem_cache *qeth_qdio_outbuf_cache;
static struct device *qeth_core_root_dev;
+static struct dentry *qeth_debugfs_root;
static struct lock_class_key qdio_out_skb_queue_key;
static void qeth_issue_next_read_cb(struct qeth_card *card,
@@ -805,6 +806,24 @@ static void qeth_del_local_addrs6(struct qeth_card *card,
spin_unlock(&card->local_addrs6_lock);
}
+static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
+{
+ struct qeth_card *card = m->private;
+ struct qeth_local_addr *tmp;
+ unsigned int i;
+
+ rcu_read_lock();
+ hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
+ seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
+ hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
+ seq_printf(m, "%pI6c\n", &tmp->addr);
+ rcu_read_unlock();
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
+
static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
struct qeth_card *card)
{
@@ -1608,6 +1627,11 @@ static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
if (!card->read_cmd)
goto out_read_cmd;
+ card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
+ qeth_debugfs_root);
+ debugfs_create_file("local_addrs", 0400, card->debugfs, card,
+ &qeth_debugfs_local_addr_fops);
+
card->qeth_service_level.seq_print = qeth_core_sl_print;
register_service_level(&card->qeth_service_level);
return card;
@@ -5085,9 +5109,11 @@ out_free_nothing:
static void qeth_core_free_card(struct qeth_card *card)
{
QETH_CARD_TEXT(card, 2, "freecrd");
+
+ unregister_service_level(&card->qeth_service_level);
+ debugfs_remove_recursive(card->debugfs);
qeth_put_cmd(card->read_cmd);
destroy_workqueue(card->event_wq);
- unregister_service_level(&card->qeth_service_level);
dev_set_drvdata(&card->gdev->dev, NULL);
kfree(card);
}
@@ -6967,6 +6993,8 @@ static int __init qeth_core_init(void)
pr_info("loading core functions\n");
+ qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
+
rc = qeth_register_dbf_views();
if (rc)
goto dbf_err;
@@ -7008,6 +7036,7 @@ slab_err:
register_err:
qeth_unregister_dbf_views();
dbf_err:
+ debugfs_remove_recursive(qeth_debugfs_root);
pr_err("Initializing the qeth device driver failed\n");
return rc;
}
@@ -7021,6 +7050,7 @@ static void __exit qeth_core_exit(void)
kmem_cache_destroy(qeth_core_header_cache);
root_device_unregister(qeth_core_root_dev);
qeth_unregister_dbf_views();
+ debugfs_remove_recursive(qeth_debugfs_root);
pr_info("core functions removed\n");
}