// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Authors:
* (C) 2015 Pengutronix, Alexander Aring <[email protected]>
* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
*/
#include <net/6lowpan.h>
#include "6lowpan_i.h"
#define LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS 8
static struct dentry *lowpan_debugfs;
static int lowpan_ctx_flag_active_set(void *data, u64 val)
{
struct lowpan_iphc_ctx *ctx = data;
if (val != 0 && val != 1)
return -EINVAL;
if (val)
set_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
else
clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
return 0;
}
static int lowpan_ctx_flag_active_get(void *data, u64 *val)
{
*val = lowpan_iphc_ctx_is_active(data);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_active_fops,
lowpan_ctx_flag_active_get,
lowpan_ctx_flag_active_set, "%llu\n");
static int lowpan_ctx_flag_c_set(void *data, u64 val)
{
struct lowpan_iphc_ctx *ctx = data;
if (val != 0 && val != 1)
return -EINVAL;
if (val)
set_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
else
clear_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
return 0;
}
static int lowpan_ctx_flag_c_get(void *data, u64 *val)
{
*val = lowpan_iphc_ctx_is_compression(data);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
lowpan_ctx_flag_c_set, "%llu\n");
static int lowpan_ctx_plen_set(void *data, u64 val)
{
struct lowpan_iphc_ctx *ctx = data;
struct lowpan_iphc_ctx_table *t =
container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
if (val > 128)
return -EINVAL;
spin_lock_bh(&t->lock);
ctx->plen = val;
spin_unlock_bh(&t->lock);
return 0;
}
static int lowpan_ctx_plen_get(void *data, u64 *val)
{
struct lowpan_iphc_ctx *ctx = data;
struct lowpan_iphc_ctx_table *t =
container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
spin_lock_bh(&t->lock);
*val = ctx->plen;
spin_unlock_bh(&t->lock);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
lowpan_ctx_plen_set, "%llu\n");
static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset)
{
struct lowpan_iphc_ctx *ctx = file->private;
struct lowpan_iphc_ctx_table *t =
container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
spin_lock_bh(&t->lock);
seq_printf(file, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
be16_to_cpu(ctx->pfx.s6_addr16[0]),
be16_to_cpu(ctx->pfx.s6_addr16[1]),
be16_to_cpu(ctx->pfx.s6_addr16[2]),
be16_to_cpu(ctx->pfx.s6_addr16[3]),
be16_to_cpu(ctx->pfx.s6_addr16[4]),
be16_to_cpu(ctx->pfx.s6_addr16[5]),
be16_to_cpu(ctx->pfx.s6_addr16[6]),
be16_to_cpu(ctx->pfx.s6_addr16[7]));
spin_unlock_bh(&t->lock);
return 0;
}
static int lowpan_ctx_pfx_open(struct inode *inode, struct file *file)
{
return single_open(file, lowpan_ctx_pfx_show, inode->i_private);
}
static ssize_t lowpan_ctx_pfx_write(struct file *fp,
const char __user *user_buf, size_t count,
loff_t *ppos)
{
char buf[128] = {};
struct seq_file *file = fp->private_data;
struct lowpan_iphc_ctx *ctx = file->private;
struct lowpan_iphc_ctx_table *t =
container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
int status = count, n, i;
unsigned int addr[8];
if (copy_from_user(&buf, user_buf, min_t(size_t, sizeof(buf) - 1,
count))) {
status = -EFAULT;
goto out;
}
n = sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
&addr[0], &addr[1], &addr[2], &addr[3], &addr[4],
&addr[5], &addr[6], &addr[7]);
if (n != LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS) {
status = -EINVAL;
goto out;
}
spin_lock_bh(&t->lock);
for (i = 0; i < 8; i++)
ctx->pfx.s6_addr16[i] = cpu_to_be16(addr[i] & 0xffff);
spin_unlock_bh(&t->lock);
out:
return status;
}
static const struct file_operations lowpan_ctx_pfx_fops = {
.open = lowpan_ctx_pfx_open,
.read = seq_read,
.write = lowpan_ctx_pfx_write,
.llseek = seq_lseek,
.release = single_release,
};
static void lowpan_dev_debugfs_ctx_init(struct net_device *dev,
struct dentry *ctx, u8 id)
{
struct lowpan_dev *ldev = lowpan_dev(dev);
struct dentry *root;
char buf[32];
if (WARN_ON_ONCE(id >= LOWPAN_IPHC_CTX_TABLE_SIZE))
return;
sprintf(buf, "%d", id);
root = debugfs_create_dir(buf, ctx);
debugfs_create_file("active", 0644, root, &ldev->ctx.table[id],
&lowpan_ctx_flag_active_fops);
debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id],
&lowpan_ctx_flag_c_fops);
debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id],
&lowpan_ctx_pfx_fops);
debugfs_create_file("prefix_len", 0644, root, &ldev->ctx.table[id],
&lowpan_ctx_plen_fops);
}
static int lowpan_context_show(struct seq_file *file, void *offset)
{
struct lowpan_iphc_ctx_table *t = file->private;
int i;
seq_printf(file, "%3s|%-43s|%c\n", "cid", "prefix", 'C');
seq_puts(file, "-------------------------------------------------\n");
spin_lock_bh(&t->lock);
for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) {
if (!lowpan_iphc_ctx_is_active(&t->table[i]))
continue;
seq_printf(file, "%3d|%39pI6c/%-3d|%d\n", t->table[i].id,
&t->table[i].pfx, t->table[i].plen,
lowpan_iphc_ctx_is_compression(&t->table[i]));
}
spin_unlock_bh(&t->lock);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(lowpan_context);
static int lowpan_short_addr_get(void *data, u64 *val)
{
struct wpan_dev *wdev = data;
rtnl_lock();
*val = le16_to_cpu(wdev->short_addr);
rtnl_unlock();
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL,
"0x%04llx\n");
static void lowpan_dev_debugfs_802154_init(const struct net_device *dev,
struct lowpan_dev *ldev)
{
struct dentry *root;
if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154))
return;
root = debugfs_create_dir("ieee802154", ldev->iface_debugfs);
debugfs_create_file("short_addr", 0444, root,
lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
&lowpan_short_addr_fops);
}
void lowpan_dev_debugfs_init(struct net_device *dev)
{
struct lowpan_dev *ldev = lowpan_dev(dev);
struct dentry *contexts;
int i;
/* creating the root */
ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs);
contexts = debugfs_create_dir("contexts", ldev->iface_debugfs);
debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx,
&lowpan_context_fops);
for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
lowpan_dev_debugfs_ctx_init(dev, contexts, i);
lowpan_dev_debugfs_802154_init(dev, ldev);
}
void lowpan_dev_debugfs_exit(struct net_device *dev)
{
debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs);
}
void __init lowpan_debugfs_init(void)
{
lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
}
void lowpan_debugfs_exit(void)
{
debugfs_remove_recursive(lowpan_debugfs);
}
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