net/6lowpan/debugfs.c

Source file repositories/reference/linux-study-clean/net/6lowpan/debugfs.c

File Facts

System
Linux kernel
Corpus path
net/6lowpan/debugfs.c
Extension
.c
Size
6846 bytes
Lines
279
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

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);

Annotation

Implementation Notes