1 // SPDX-License-Identifier: GPL-2.0-only
5 * (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
6 * Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
9 #include <net/6lowpan.h>
11 #include "6lowpan_i.h"
13 #define LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS 8
15 static struct dentry *lowpan_debugfs;
17 static int lowpan_ctx_flag_active_set(void *data, u64 val)
19 struct lowpan_iphc_ctx *ctx = data;
21 if (val != 0 && val != 1)
25 set_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
27 clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
32 static int lowpan_ctx_flag_active_get(void *data, u64 *val)
34 *val = lowpan_iphc_ctx_is_active(data);
38 DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_active_fops,
39 lowpan_ctx_flag_active_get,
40 lowpan_ctx_flag_active_set, "%llu\n");
42 static int lowpan_ctx_flag_c_set(void *data, u64 val)
44 struct lowpan_iphc_ctx *ctx = data;
46 if (val != 0 && val != 1)
50 set_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
52 clear_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
57 static int lowpan_ctx_flag_c_get(void *data, u64 *val)
59 *val = lowpan_iphc_ctx_is_compression(data);
63 DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
64 lowpan_ctx_flag_c_set, "%llu\n");
66 static int lowpan_ctx_plen_set(void *data, u64 val)
68 struct lowpan_iphc_ctx *ctx = data;
69 struct lowpan_iphc_ctx_table *t =
70 container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
75 spin_lock_bh(&t->lock);
77 spin_unlock_bh(&t->lock);
82 static int lowpan_ctx_plen_get(void *data, u64 *val)
84 struct lowpan_iphc_ctx *ctx = data;
85 struct lowpan_iphc_ctx_table *t =
86 container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
88 spin_lock_bh(&t->lock);
90 spin_unlock_bh(&t->lock);
94 DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
95 lowpan_ctx_plen_set, "%llu\n");
97 static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset)
99 struct lowpan_iphc_ctx *ctx = file->private;
100 struct lowpan_iphc_ctx_table *t =
101 container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
103 spin_lock_bh(&t->lock);
104 seq_printf(file, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
105 be16_to_cpu(ctx->pfx.s6_addr16[0]),
106 be16_to_cpu(ctx->pfx.s6_addr16[1]),
107 be16_to_cpu(ctx->pfx.s6_addr16[2]),
108 be16_to_cpu(ctx->pfx.s6_addr16[3]),
109 be16_to_cpu(ctx->pfx.s6_addr16[4]),
110 be16_to_cpu(ctx->pfx.s6_addr16[5]),
111 be16_to_cpu(ctx->pfx.s6_addr16[6]),
112 be16_to_cpu(ctx->pfx.s6_addr16[7]));
113 spin_unlock_bh(&t->lock);
118 static int lowpan_ctx_pfx_open(struct inode *inode, struct file *file)
120 return single_open(file, lowpan_ctx_pfx_show, inode->i_private);
123 static ssize_t lowpan_ctx_pfx_write(struct file *fp,
124 const char __user *user_buf, size_t count,
128 struct seq_file *file = fp->private_data;
129 struct lowpan_iphc_ctx *ctx = file->private;
130 struct lowpan_iphc_ctx_table *t =
131 container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
132 int status = count, n, i;
133 unsigned int addr[8];
135 if (copy_from_user(&buf, user_buf, min_t(size_t, sizeof(buf) - 1,
141 n = sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
142 &addr[0], &addr[1], &addr[2], &addr[3], &addr[4],
143 &addr[5], &addr[6], &addr[7]);
144 if (n != LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS) {
149 spin_lock_bh(&t->lock);
150 for (i = 0; i < 8; i++)
151 ctx->pfx.s6_addr16[i] = cpu_to_be16(addr[i] & 0xffff);
152 spin_unlock_bh(&t->lock);
158 static const struct file_operations lowpan_ctx_pfx_fops = {
159 .open = lowpan_ctx_pfx_open,
161 .write = lowpan_ctx_pfx_write,
163 .release = single_release,
166 static void lowpan_dev_debugfs_ctx_init(struct net_device *dev,
167 struct dentry *ctx, u8 id)
169 struct lowpan_dev *ldev = lowpan_dev(dev);
173 WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE);
175 sprintf(buf, "%d", id);
177 root = debugfs_create_dir(buf, ctx);
179 debugfs_create_file("active", 0644, root, &ldev->ctx.table[id],
180 &lowpan_ctx_flag_active_fops);
182 debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id],
183 &lowpan_ctx_flag_c_fops);
185 debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id],
186 &lowpan_ctx_pfx_fops);
188 debugfs_create_file("prefix_len", 0644, root, &ldev->ctx.table[id],
189 &lowpan_ctx_plen_fops);
192 static int lowpan_context_show(struct seq_file *file, void *offset)
194 struct lowpan_iphc_ctx_table *t = file->private;
197 seq_printf(file, "%3s|%-43s|%c\n", "cid", "prefix", 'C');
198 seq_puts(file, "-------------------------------------------------\n");
200 spin_lock_bh(&t->lock);
201 for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) {
202 if (!lowpan_iphc_ctx_is_active(&t->table[i]))
205 seq_printf(file, "%3d|%39pI6c/%-3d|%d\n", t->table[i].id,
206 &t->table[i].pfx, t->table[i].plen,
207 lowpan_iphc_ctx_is_compression(&t->table[i]));
209 spin_unlock_bh(&t->lock);
213 DEFINE_SHOW_ATTRIBUTE(lowpan_context);
215 static int lowpan_short_addr_get(void *data, u64 *val)
217 struct wpan_dev *wdev = data;
220 *val = le16_to_cpu(wdev->short_addr);
226 DEFINE_DEBUGFS_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL,
229 static void lowpan_dev_debugfs_802154_init(const struct net_device *dev,
230 struct lowpan_dev *ldev)
234 if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154))
237 root = debugfs_create_dir("ieee802154", ldev->iface_debugfs);
239 debugfs_create_file("short_addr", 0444, root,
240 lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
241 &lowpan_short_addr_fops);
244 void lowpan_dev_debugfs_init(struct net_device *dev)
246 struct lowpan_dev *ldev = lowpan_dev(dev);
247 struct dentry *contexts;
250 /* creating the root */
251 ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs);
253 contexts = debugfs_create_dir("contexts", ldev->iface_debugfs);
255 debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx,
256 &lowpan_context_fops);
258 for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
259 lowpan_dev_debugfs_ctx_init(dev, contexts, i);
261 lowpan_dev_debugfs_802154_init(dev, ldev);
264 void lowpan_dev_debugfs_exit(struct net_device *dev)
266 debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs);
269 void __init lowpan_debugfs_init(void)
271 lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
274 void lowpan_debugfs_exit(void)
276 debugfs_remove_recursive(lowpan_debugfs);