[PATCH net-next 07/11] net: dsa: debugfs: add port fdb
flat view
STALE3343d
SUPERSEDED
From: Vivien Didelot <hidden>
Date: 2017-08-14 22:29:44
Also in:
lkml
Subsystem:
networking [dsa], networking [general], the rest · Maintainers:
Andrew Lunn, Vladimir Oltean, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Revision v1 of 2 in this series.
Revisions (2)
- v1 current
- v2 [diff vs current]
Add a debug filesystem "fdb" entry to query a port's hardware FDB
entries through the .port_fdb_dump switch operation.
This is really convenient to query directly the hardware or inspect DSA
or CPU links, since these ports are not exposed to userspace.
# cat port1/fdb
vid 0 12:34:56:78:90:ab static unicast
Signed-off-by: Vivien Didelot <redacted>
---
net/dsa/debugfs.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/net/dsa/debugfs.c b/net/dsa/debugfs.c
index 012fcf466cc1..8204c62dc9c1 100644
--- a/net/dsa/debugfs.c
+++ b/net/dsa/debugfs.c@@ -10,6 +10,7 @@ */ #include <linux/debugfs.h> +#include <linux/etherdevice.h> #include <linux/seq_file.h> #include "dsa_priv.h"
@@ -109,6 +110,36 @@ static int dsa_debugfs_create_file(struct dsa_switch *ds, struct dentry *dir, return 0; } +static int dsa_debugfs_fdb_dump_cb(const unsigned char *addr, u16 vid, + bool is_static, void *data) +{ + struct seq_file *seq = data; + int i; + + seq_printf(seq, "vid %d", vid); + for (i = 0; i < ETH_ALEN; i++) + seq_printf(seq, "%s%02x", i ? ":" : " ", addr[i]); + seq_printf(seq, " %s", is_static ? "static" : "dynamic"); + seq_printf(seq, " %s", is_unicast_ether_addr(addr) ? + "unicast" : "multicast"); + seq_puts(seq, "\n"); + + return 0; +} + +static int dsa_debugfs_fdb_read(struct dsa_switch *ds, int id, + struct seq_file *seq) +{ + if (!ds->ops->port_fdb_dump) + return -EOPNOTSUPP; + + return ds->ops->port_fdb_dump(ds, id, dsa_debugfs_fdb_dump_cb, seq); +} + +static const struct dsa_debugfs_ops dsa_debugfs_fdb_ops = { + .read = dsa_debugfs_fdb_read, +}; + static void dsa_debugfs_regs_read_count(struct dsa_switch *ds, int id, struct seq_file *seq, int count) {
@@ -253,6 +284,11 @@ static int dsa_debugfs_create_port(struct dsa_switch *ds, int port) if (IS_ERR_OR_NULL(dir)) return -EFAULT; + err = dsa_debugfs_create_file(ds, dir, "fdb", port, + &dsa_debugfs_fdb_ops); + if (err) + return err; + err = dsa_debugfs_create_file(ds, dir, "regs", port, &dsa_debugfs_regs_ops); if (err)
--
2.14.0