From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/6lowpan/debugfs.c | 141 +++++++++++++---------------------------------
1 files changed, 40 insertions(+), 101 deletions(-)
diff --git a/kernel/net/6lowpan/debugfs.c b/kernel/net/6lowpan/debugfs.c
index 24915e0..600b956 100644
--- a/kernel/net/6lowpan/debugfs.c
+++ b/kernel/net/6lowpan/debugfs.c
@@ -1,11 +1,5 @@
-/* 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.
+// SPDX-License-Identifier: GPL-2.0-only
+/*
*
* Authors:
* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
@@ -41,9 +35,9 @@
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_active_fops,
- lowpan_ctx_flag_active_get,
- lowpan_ctx_flag_active_set, "%llu\n");
+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)
{
@@ -66,8 +60,8 @@
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
- lowpan_ctx_flag_c_set, "%llu\n");
+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)
{
@@ -97,8 +91,8 @@
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
- lowpan_ctx_plen_set, "%llu\n");
+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)
{
@@ -169,46 +163,31 @@
.release = single_release,
};
-static int lowpan_dev_debugfs_ctx_init(struct net_device *dev,
- struct dentry *ctx, u8 id)
+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 *dentry, *root;
+ struct dentry *root;
char buf[32];
- WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE);
+ if (WARN_ON_ONCE(id >= LOWPAN_IPHC_CTX_TABLE_SIZE))
+ return;
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;
+ debugfs_create_file("active", 0644, root, &ldev->ctx.table[id],
+ &lowpan_ctx_flag_active_fops);
- dentry = debugfs_create_file("compression", 0644, root,
- &ldev->ctx.table[id],
- &lowpan_ctx_flag_c_fops);
- if (!dentry)
- return -EINVAL;
+ debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id],
+ &lowpan_ctx_flag_c_fops);
- dentry = debugfs_create_file("prefix", 0644, root,
- &ldev->ctx.table[id],
- &lowpan_ctx_pfx_fops);
- if (!dentry)
- return -EINVAL;
+ debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id],
+ &lowpan_ctx_pfx_fops);
- dentry = debugfs_create_file("prefix_len", 0644, root,
- &ldev->ctx.table[id],
- &lowpan_ctx_plen_fops);
- if (!dentry)
- return -EINVAL;
-
- return 0;
+ 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)
@@ -232,18 +211,7 @@
return 0;
}
-
-static int lowpan_context_open(struct inode *inode, struct file *file)
-{
- return single_open(file, lowpan_context_show, inode->i_private);
-}
-
-static const struct file_operations lowpan_context_fops = {
- .open = lowpan_context_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(lowpan_context);
static int lowpan_short_addr_get(void *data, u64 *val)
{
@@ -256,67 +224,42 @@
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get,
- NULL, "0x%04llx\n");
+DEFINE_DEBUGFS_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,
+static void lowpan_dev_debugfs_802154_init(const struct net_device *dev,
struct lowpan_dev *ldev)
{
- struct dentry *dentry, *root;
+ struct dentry *root;
if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154))
- return 0;
+ return;
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;
+ debugfs_create_file("short_addr", 0444, root,
+ lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
+ &lowpan_short_addr_fops);
}
-int lowpan_dev_debugfs_init(struct net_device *dev)
+void lowpan_dev_debugfs_init(struct net_device *dev)
{
struct lowpan_dev *ldev = lowpan_dev(dev);
- struct dentry *contexts, *dentry;
- int ret, i;
+ struct dentry *contexts;
+ int 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;
+ debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx,
+ &lowpan_context_fops);
- 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;
- }
+ for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
+ lowpan_dev_debugfs_ctx_init(dev, contexts, i);
- 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;
+ lowpan_dev_debugfs_802154_init(dev, ldev);
}
void lowpan_dev_debugfs_exit(struct net_device *dev)
@@ -324,13 +267,9 @@
debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs);
}
-int __init lowpan_debugfs_init(void)
+void __init lowpan_debugfs_init(void)
{
lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
- if (!lowpan_debugfs)
- return -EINVAL;
-
- return 0;
}
void lowpan_debugfs_exit(void)
--
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