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Code Issues

realtek: add debugfs node for L2 table

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This allows to view all unicast and multicast entries that are currently
in the L2 hash table and the CAM.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>
This commit is contained in:
Jan Hoffmann 2022-10-14 23:06:16 +02:00 committed by Sander Vanheule
parent 4657a5301e
commit ae9487c535
1 changed files with 107 additions and 0 deletions
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107
target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/debugfs.c
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@ -270,6 +270,109 @@ static const struct file_operations drop_counter_fops = {
.read = drop_counter_read,
};
static void l2_table_print_entry(struct seq_file *m, struct rtl838x_switch_priv *priv,
struct rtl838x_l2_entry *e)
{
u64 portmask;
int i;
if (e->type == L2_UNICAST) {
seq_puts(m, "L2_UNICAST\n");
seq_printf(m, " mac %02x:%02x:%02x:%02x:%02x:%02x vid %u rvid %u\n",
e->mac[0], e->mac[1], e->mac[2], e->mac[3], e->mac[4], e->mac[5],
e->vid, e->rvid);
seq_printf(m, " port %d age %d", e->port, e->age);
if (e->is_static)
seq_puts(m, " static");
if (e->block_da)
seq_puts(m, " block_da");
if (e->block_sa)
seq_puts(m, " block_sa");
if (e->suspended)
seq_puts(m, " suspended");
if (e->next_hop)
seq_printf(m, " next_hop route_id %u", e->nh_route_id);
seq_puts(m, "\n");
} else {
if (e->type == L2_MULTICAST) {
seq_puts(m, "L2_MULTICAST\n");
seq_printf(m, " mac %02x:%02x:%02x:%02x:%02x:%02x vid %u rvid %u\n",
e->mac[0], e->mac[1], e->mac[2], e->mac[3], e->mac[4], e->mac[5],
e->vid, e->rvid);
}
if (e->type == IP4_MULTICAST || e->type == IP6_MULTICAST) {
seq_puts(m, (e->type == IP4_MULTICAST) ?
"IP4_MULTICAST\n" : "IP6_MULTICAST\n");
seq_printf(m, " gip %08x sip %08x vid %u rvid %u\n",
e->mc_gip, e->mc_sip, e->vid, e->rvid);
}
portmask = priv->r->read_mcast_pmask(e->mc_portmask_index);
seq_printf(m, " index %u ports", e->mc_portmask_index);
for (i = 0; i < 64; i++) {
if (portmask & BIT_ULL(i))
seq_printf(m, " %d", i);
}
seq_puts(m, "\n");
}
seq_puts(m, "\n");
}
static int l2_table_show(struct seq_file *m, void *v)
{
struct rtl838x_switch_priv *priv = m->private;
struct rtl838x_l2_entry e;
int i, bucket, index;
mutex_lock(&priv->reg_mutex);
for (i = 0; i < priv->fib_entries; i++) {
bucket = i >> 2;
index = i & 0x3;
priv->r->read_l2_entry_using_hash(bucket, index, &e);
if (!e.valid)
continue;
seq_printf(m, "Hash table bucket %d index %d ", bucket, index);
l2_table_print_entry(m, priv, &e);
}
for (i = 0; i < 64; i++) {
priv->r->read_cam(i, &e);
if (!e.valid)
continue;
seq_printf(m, "CAM index %d ", i);
l2_table_print_entry(m, priv, &e);
}
mutex_unlock(&priv->reg_mutex);
return 0;
}
static int l2_table_open(struct inode *inode, struct file *filp)
{
return single_open(filp, l2_table_show, inode->i_private);
}
static const struct file_operations l2_table_fops = {
.owner = THIS_MODULE,
.open = l2_table_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static ssize_t age_out_read(struct file *filp, char __user *buffer, size_t count,
loff_t *ppos)
{
@ -608,6 +711,8 @@ void rtl838x_dbgfs_init(struct rtl838x_switch_priv *priv)
debugfs_create_file("drop_counters", 0400, rtl838x_dir, priv, &drop_counter_fops);
debugfs_create_file("l2_table", 0400, rtl838x_dir, priv, &l2_table_fops);
return;
err:
rtl838x_dbgfs_cleanup(priv);
@ -625,4 +730,6 @@ void rtl930x_dbgfs_init(struct rtl838x_switch_priv *priv)
priv->dbgfs_dir = dbg_dir;
debugfs_create_file("drop_counters", 0400, dbg_dir, priv, &drop_counter_fops);
debugfs_create_file("l2_table", 0400, dbg_dir, priv, &l2_table_fops);
}