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Subject[PATCH net-next 04/11] net: dsa: debugfs: add tag_protocol
Date
Add a debug filesystem "tag_protocol" entry to query the switch tagging
protocol through the .get_tag_protocol operation.

# cat switch1/tag_protocol
EDSA

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
net/dsa/debugfs.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)

diff --git a/net/dsa/debugfs.c b/net/dsa/debugfs.c
index 5607efdb924d..30a732e86161 100644
--- a/net/dsa/debugfs.c
+++ b/net/dsa/debugfs.c
@@ -109,6 +109,55 @@ static int dsa_debugfs_create_file(struct dsa_switch *ds, struct dentry *dir,
return 0;
}

+static int dsa_debugfs_tag_protocol_read(struct dsa_switch *ds, int id,
+ struct seq_file *seq)
+{
+ enum dsa_tag_protocol proto;
+
+ if (!ds->ops->get_tag_protocol)
+ return -EOPNOTSUPP;
+
+ proto = ds->ops->get_tag_protocol(ds);
+
+ switch (proto) {
+ case DSA_TAG_PROTO_NONE:
+ seq_puts(seq, "NONE\n");
+ break;
+ case DSA_TAG_PROTO_BRCM:
+ seq_puts(seq, "BRCM\n");
+ break;
+ case DSA_TAG_PROTO_DSA:
+ seq_puts(seq, "DSA\n");
+ break;
+ case DSA_TAG_PROTO_EDSA:
+ seq_puts(seq, "EDSA\n");
+ break;
+ case DSA_TAG_PROTO_KSZ:
+ seq_puts(seq, "KSZ\n");
+ break;
+ case DSA_TAG_PROTO_LAN9303:
+ seq_puts(seq, "LAN9303\n");
+ break;
+ case DSA_TAG_PROTO_MTK:
+ seq_puts(seq, "MTK\n");
+ break;
+ case DSA_TAG_PROTO_QCA:
+ seq_puts(seq, "QCA\n");
+ break;
+ case DSA_TAG_PROTO_TRAILER:
+ seq_puts(seq, "TRAILER\n");
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct dsa_debugfs_ops dsa_debugfs_tag_protocol_ops = {
+ .read = dsa_debugfs_tag_protocol_read,
+};
+
static int dsa_debugfs_tree_read(struct dsa_switch *ds, int id,
struct seq_file *seq)
{
@@ -151,6 +200,11 @@ static int dsa_debugfs_create_switch(struct dsa_switch *ds)
if (IS_ERR_OR_NULL(ds->debugfs_dir))
return -EFAULT;

+ err = dsa_debugfs_create_file(ds, ds->debugfs_dir, "tag_protocol", -1,
+ &dsa_debugfs_tag_protocol_ops);
+ if (err)
+ return err;
+
err = dsa_debugfs_create_file(ds, ds->debugfs_dir, "tree", -1,
&dsa_debugfs_tree_ops);
if (err)
--
2.14.0
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