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Release 4.14 net/6lowpan/debugfs.c

Directory: net/6lowpan
/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Authors:
 * (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
 * 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; }

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static int lowpan_ctx_flag_active_get(void *data, u64 *val) { *val = lowpan_iphc_ctx_is_active(data); return 0; }

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DEFINE_SIMPLE_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; }

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static int lowpan_ctx_flag_c_get(void *data, u64 *val) { *val = lowpan_iphc_ctx_is_compression(data); return 0; }

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DEFINE_SIMPLE_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; }

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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; }

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DEFINE_SIMPLE_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; }

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static int lowpan_ctx_pfx_open(struct inode *inode, struct file *file) { return single_open(file, lowpan_ctx_pfx_show, inode->i_private); }

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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; }

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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 int lowpan_dev_debugfs_ctx_init(struct net_device *dev, struct dentry *ctx, u8 id) { struct lowpan_dev *ldev = lowpan_dev(dev); struct dentry *dentry, *root; char buf[32]; WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE); sprintf(buf, "%d", id); root = debugfs_create_dir(buf, ctx); if (!root) return -EINVAL; dentry = debugfs_create_file("active", 0644, root, &ldev->ctx.table[id], &lowpan_ctx_flag_active_fops); if (!dentry) return -EINVAL; dentry = debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id], &lowpan_ctx_flag_c_fops); if (!dentry) return -EINVAL; dentry = debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id], &lowpan_ctx_pfx_fops); if (!dentry) return -EINVAL; dentry = debugfs_create_file("prefix_len", 0644, root, &ldev->ctx.table[id], &lowpan_ctx_plen_fops); if (!dentry) return -EINVAL; return 0; }

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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; }

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static int lowpan_context_open(struct inode *inode, struct file *file) { return single_open(file, lowpan_context_show, inode->i_private); }

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static const struct file_operations lowpan_context_fops = { .open = lowpan_context_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, };
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; }

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DEFINE_SIMPLE_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL, "0x%04llx\n");
static int lowpan_dev_debugfs_802154_init(const struct net_device *dev, struct lowpan_dev *ldev) { struct dentry *dentry, *root; if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) return 0; root = debugfs_create_dir("ieee802154", ldev->iface_debugfs); if (!root) return -EINVAL; dentry = debugfs_create_file("short_addr", 0444, root, lowpan_802154_dev(dev)->wdev->ieee802154_ptr, &lowpan_short_addr_fops); if (!dentry) return -EINVAL; return 0; }

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int lowpan_dev_debugfs_init(struct net_device *dev) { struct lowpan_dev *ldev = lowpan_dev(dev); struct dentry *contexts, *dentry; int ret, i; /* creating the root */ ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs); if (!ldev->iface_debugfs) goto fail; contexts = debugfs_create_dir("contexts", ldev->iface_debugfs); if (!contexts) goto remove_root; dentry = debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx, &lowpan_context_fops); if (!dentry) goto remove_root; for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) { ret = lowpan_dev_debugfs_ctx_init(dev, contexts, i); if (ret < 0) goto remove_root; } ret = lowpan_dev_debugfs_802154_init(dev, ldev); if (ret < 0) goto remove_root; return 0; remove_root: lowpan_dev_debugfs_exit(dev); fail: return -EINVAL; }

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void lowpan_dev_debugfs_exit(struct net_device *dev) { debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs); }

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int __init lowpan_debugfs_init(void) { lowpan_debugfs = debugfs_create_dir("6lowpan", NULL); if (!lowpan_debugfs) return -EINVAL; return 0; }

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void lowpan_debugfs_exit(void) { debugfs_remove_recursive(lowpan_debugfs); }

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Directory: net/6lowpan
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