301 lines
7.2 KiB
C
301 lines
7.2 KiB
C
/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors:
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* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
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* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
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*/
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#include <net/6lowpan.h>
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#include "6lowpan_i.h"
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#define LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS 8
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static struct dentry *lowpan_debugfs;
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static int lowpan_ctx_flag_active_set(void *data, u64 val)
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{
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struct lowpan_iphc_ctx *ctx = data;
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if (val != 0 && val != 1)
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return -EINVAL;
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if (val)
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set_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
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else
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clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags);
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return 0;
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}
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static int lowpan_ctx_flag_active_get(void *data, u64 *val)
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{
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*val = lowpan_iphc_ctx_is_active(data);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_active_fops,
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lowpan_ctx_flag_active_get,
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lowpan_ctx_flag_active_set, "%llu\n");
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static int lowpan_ctx_flag_c_set(void *data, u64 val)
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{
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struct lowpan_iphc_ctx *ctx = data;
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if (val != 0 && val != 1)
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return -EINVAL;
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if (val)
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set_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
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else
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clear_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags);
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return 0;
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}
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static int lowpan_ctx_flag_c_get(void *data, u64 *val)
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{
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*val = lowpan_iphc_ctx_is_compression(data);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
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lowpan_ctx_flag_c_set, "%llu\n");
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static int lowpan_ctx_plen_set(void *data, u64 val)
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{
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struct lowpan_iphc_ctx *ctx = data;
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struct lowpan_iphc_ctx_table *t =
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container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
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if (val > 128)
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return -EINVAL;
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spin_lock_bh(&t->lock);
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ctx->plen = val;
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spin_unlock_bh(&t->lock);
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return 0;
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}
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static int lowpan_ctx_plen_get(void *data, u64 *val)
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{
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struct lowpan_iphc_ctx *ctx = data;
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struct lowpan_iphc_ctx_table *t =
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container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
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spin_lock_bh(&t->lock);
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*val = ctx->plen;
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spin_unlock_bh(&t->lock);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
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lowpan_ctx_plen_set, "%llu\n");
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static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset)
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{
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struct lowpan_iphc_ctx *ctx = file->private;
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struct lowpan_iphc_ctx_table *t =
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container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
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spin_lock_bh(&t->lock);
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seq_printf(file, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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be16_to_cpu(ctx->pfx.s6_addr16[0]),
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be16_to_cpu(ctx->pfx.s6_addr16[1]),
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be16_to_cpu(ctx->pfx.s6_addr16[2]),
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be16_to_cpu(ctx->pfx.s6_addr16[3]),
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be16_to_cpu(ctx->pfx.s6_addr16[4]),
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be16_to_cpu(ctx->pfx.s6_addr16[5]),
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be16_to_cpu(ctx->pfx.s6_addr16[6]),
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be16_to_cpu(ctx->pfx.s6_addr16[7]));
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spin_unlock_bh(&t->lock);
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return 0;
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}
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static int lowpan_ctx_pfx_open(struct inode *inode, struct file *file)
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{
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return single_open(file, lowpan_ctx_pfx_show, inode->i_private);
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}
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static ssize_t lowpan_ctx_pfx_write(struct file *fp,
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const char __user *user_buf, size_t count,
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loff_t *ppos)
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{
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char buf[128] = {};
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struct seq_file *file = fp->private_data;
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struct lowpan_iphc_ctx *ctx = file->private;
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struct lowpan_iphc_ctx_table *t =
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container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]);
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int status = count, n, i;
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unsigned int addr[8];
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if (copy_from_user(&buf, user_buf, min_t(size_t, sizeof(buf) - 1,
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count))) {
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status = -EFAULT;
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goto out;
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}
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n = sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
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&addr[0], &addr[1], &addr[2], &addr[3], &addr[4],
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&addr[5], &addr[6], &addr[7]);
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if (n != LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS) {
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status = -EINVAL;
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goto out;
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}
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spin_lock_bh(&t->lock);
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for (i = 0; i < 8; i++)
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ctx->pfx.s6_addr16[i] = cpu_to_be16(addr[i] & 0xffff);
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spin_unlock_bh(&t->lock);
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out:
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return status;
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}
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static const struct file_operations lowpan_ctx_pfx_fops = {
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.open = lowpan_ctx_pfx_open,
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.read = seq_read,
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.write = lowpan_ctx_pfx_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int lowpan_dev_debugfs_ctx_init(struct net_device *dev,
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struct dentry *ctx, u8 id)
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{
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struct lowpan_dev *ldev = lowpan_dev(dev);
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struct dentry *dentry, *root;
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char buf[32];
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WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE);
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sprintf(buf, "%d", id);
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root = debugfs_create_dir(buf, ctx);
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if (!root)
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return -EINVAL;
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dentry = debugfs_create_file("active", 0644, root,
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&ldev->ctx.table[id],
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&lowpan_ctx_flag_active_fops);
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if (!dentry)
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return -EINVAL;
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dentry = debugfs_create_file("compression", 0644, root,
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&ldev->ctx.table[id],
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&lowpan_ctx_flag_c_fops);
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if (!dentry)
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return -EINVAL;
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dentry = debugfs_create_file("prefix", 0644, root,
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&ldev->ctx.table[id],
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&lowpan_ctx_pfx_fops);
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if (!dentry)
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return -EINVAL;
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dentry = debugfs_create_file("prefix_len", 0644, root,
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&ldev->ctx.table[id],
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&lowpan_ctx_plen_fops);
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if (!dentry)
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return -EINVAL;
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return 0;
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}
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static int lowpan_context_show(struct seq_file *file, void *offset)
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{
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struct lowpan_iphc_ctx_table *t = file->private;
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int i;
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seq_printf(file, "%3s|%-43s|%c\n", "cid", "prefix", 'C');
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seq_puts(file, "-------------------------------------------------\n");
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spin_lock_bh(&t->lock);
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for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) {
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if (!lowpan_iphc_ctx_is_active(&t->table[i]))
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continue;
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seq_printf(file, "%3d|%39pI6c/%-3d|%d\n", t->table[i].id,
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&t->table[i].pfx, t->table[i].plen,
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lowpan_iphc_ctx_is_compression(&t->table[i]));
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}
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spin_unlock_bh(&t->lock);
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return 0;
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}
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static int lowpan_context_open(struct inode *inode, struct file *file)
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{
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return single_open(file, lowpan_context_show, inode->i_private);
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}
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static const struct file_operations lowpan_context_fops = {
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.open = lowpan_context_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int lowpan_dev_debugfs_init(struct net_device *dev)
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{
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struct lowpan_dev *ldev = lowpan_dev(dev);
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struct dentry *contexts, *dentry;
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int ret, i;
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/* creating the root */
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ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs);
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if (!ldev->iface_debugfs)
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goto fail;
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contexts = debugfs_create_dir("contexts", ldev->iface_debugfs);
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if (!contexts)
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goto remove_root;
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dentry = debugfs_create_file("show", 0644, contexts,
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&lowpan_dev(dev)->ctx,
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&lowpan_context_fops);
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if (!dentry)
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goto remove_root;
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for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) {
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ret = lowpan_dev_debugfs_ctx_init(dev, contexts, i);
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if (ret < 0)
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goto remove_root;
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}
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return 0;
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remove_root:
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lowpan_dev_debugfs_exit(dev);
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fail:
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return -EINVAL;
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}
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void lowpan_dev_debugfs_exit(struct net_device *dev)
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{
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debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs);
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}
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int __init lowpan_debugfs_init(void)
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{
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lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
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if (!lowpan_debugfs)
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return -EINVAL;
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return 0;
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}
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void lowpan_debugfs_exit(void)
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{
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debugfs_remove_recursive(lowpan_debugfs);
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}
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