atalk_proc.c 7.0 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
/*
 * 	atalk_proc.c - proc support for Appletalk
 *
 * 	Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 *	This program is free software; you can redistribute it and/or modify it
 *	under the terms of the GNU General Public License as published by the
 *	Free Software Foundation, version 2.
 */

#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/sock.h>
#include <linux/atalk.h>


static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
{
	struct atalk_iface *i;

	for (i = atalk_interfaces; pos && i; i = i->next)
		--pos;

	return i;
}

static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
{
	loff_t l = *pos;

	read_lock_bh(&atalk_interfaces_lock);
	return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct atalk_iface *i;

	++*pos;
	if (v == SEQ_START_TOKEN) {
		i = NULL;
		if (atalk_interfaces)
			i = atalk_interfaces;
		goto out;
	}
	i = v;
	i = i->next;
out:
	return i;
}

static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
{
	read_unlock_bh(&atalk_interfaces_lock);
}

static int atalk_seq_interface_show(struct seq_file *seq, void *v)
{
	struct atalk_iface *iface;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq, "Interface        Address   Networks  "
			      "Status\n");
		goto out;
	}

	iface = v;
	seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
		   iface->dev->name, ntohs(iface->address.s_net),
		   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
		   ntohs(iface->nets.nr_lastnet), iface->status);
out:
	return 0;
}

static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
{
	struct atalk_route *r;

	for (r = atalk_routes; pos && r; r = r->next)
		--pos;

	return r;
}

static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
{
	loff_t l = *pos;

	read_lock_bh(&atalk_routes_lock);
	return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct atalk_route *r;

	++*pos;
	if (v == SEQ_START_TOKEN) {
		r = NULL;
		if (atalk_routes)
			r = atalk_routes;
		goto out;
	}
	r = v;
	r = r->next;
out:
	return r;
}

static void atalk_seq_route_stop(struct seq_file *seq, void *v)
{
	read_unlock_bh(&atalk_routes_lock);
}

static int atalk_seq_route_show(struct seq_file *seq, void *v)
{
	struct atalk_route *rt;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq, "Target        Router  Flags Dev\n");
		goto out;
	}

	if (atrtr_default.dev) {
		rt = &atrtr_default;
		seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
			       ntohs(rt->gateway.s_net), rt->gateway.s_node,
			       rt->flags, rt->dev->name);
	}

	rt = v;
	seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
		   ntohs(rt->target.s_net), rt->target.s_node,
		   ntohs(rt->gateway.s_net), rt->gateway.s_node,
		   rt->flags, rt->dev->name);
out:
	return 0;
}

static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
{
	struct sock *s;
	struct hlist_node *node;

	sk_for_each(s, node, &atalk_sockets)
		if (!pos--)
			goto found;
	s = NULL;
found:
	return s;
}

static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
{
	loff_t l = *pos;

	read_lock_bh(&atalk_sockets_lock);
	return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct sock *i;

	++*pos;
	if (v == SEQ_START_TOKEN) {
		i = sk_head(&atalk_sockets);
		goto out;
	}
	i = sk_next(v);
out:
	return i;
}

static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
{
	read_unlock_bh(&atalk_sockets_lock);
}

static int atalk_seq_socket_show(struct seq_file *seq, void *v)
{
	struct sock *s;
	struct atalk_sock *at;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
				"Rx_queue St UID\n");
		goto out;
	}

	s = v;
	at = at_sk(s);

	seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
			"%02X %d\n",
		   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
		   ntohs(at->dest_net), at->dest_node, at->dest_port,
		   atomic_read(&s->sk_wmem_alloc),
		   atomic_read(&s->sk_rmem_alloc),
		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
out:
	return 0;
}

207
static const struct seq_operations atalk_seq_interface_ops = {
L
Linus Torvalds 已提交
208 209 210 211 212 213
	.start  = atalk_seq_interface_start,
	.next   = atalk_seq_interface_next,
	.stop   = atalk_seq_interface_stop,
	.show   = atalk_seq_interface_show,
};

214
static const struct seq_operations atalk_seq_route_ops = {
L
Linus Torvalds 已提交
215 216 217 218 219 220
	.start  = atalk_seq_route_start,
	.next   = atalk_seq_route_next,
	.stop   = atalk_seq_route_stop,
	.show   = atalk_seq_route_show,
};

221
static const struct seq_operations atalk_seq_socket_ops = {
L
Linus Torvalds 已提交
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
	.start  = atalk_seq_socket_start,
	.next   = atalk_seq_socket_next,
	.stop   = atalk_seq_socket_stop,
	.show   = atalk_seq_socket_show,
};

static int atalk_seq_interface_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &atalk_seq_interface_ops);
}

static int atalk_seq_route_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &atalk_seq_route_ops);
}

static int atalk_seq_socket_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &atalk_seq_socket_ops);
}

243
static const struct file_operations atalk_seq_interface_fops = {
L
Linus Torvalds 已提交
244 245 246 247 248 249 250
	.owner		= THIS_MODULE,
	.open		= atalk_seq_interface_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

251
static const struct file_operations atalk_seq_route_fops = {
L
Linus Torvalds 已提交
252 253 254 255 256 257 258
	.owner		= THIS_MODULE,
	.open		= atalk_seq_route_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

259
static const struct file_operations atalk_seq_socket_fops = {
L
Linus Torvalds 已提交
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294
	.owner		= THIS_MODULE,
	.open		= atalk_seq_socket_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static struct proc_dir_entry *atalk_proc_dir;

int __init atalk_proc_init(void)
{
	struct proc_dir_entry *p;
	int rc = -ENOMEM;

	atalk_proc_dir = proc_mkdir("atalk", proc_net);
	if (!atalk_proc_dir)
		goto out;
	atalk_proc_dir->owner = THIS_MODULE;

	p = create_proc_entry("interface", S_IRUGO, atalk_proc_dir);
	if (!p)
		goto out_interface;
	p->proc_fops = &atalk_seq_interface_fops;

	p = create_proc_entry("route", S_IRUGO, atalk_proc_dir);
	if (!p)
		goto out_route;
	p->proc_fops = &atalk_seq_route_fops;

	p = create_proc_entry("socket", S_IRUGO, atalk_proc_dir);
	if (!p)
		goto out_socket;
	p->proc_fops = &atalk_seq_socket_fops;

	p = create_proc_entry("arp", S_IRUGO, atalk_proc_dir);
295
	if (!p)
L
Linus Torvalds 已提交
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320
		goto out_arp;
	p->proc_fops = &atalk_seq_arp_fops;

	rc = 0;
out:
	return rc;
out_arp:
	remove_proc_entry("socket", atalk_proc_dir);
out_socket:
	remove_proc_entry("route", atalk_proc_dir);
out_route:
	remove_proc_entry("interface", atalk_proc_dir);
out_interface:
	remove_proc_entry("atalk", proc_net);
	goto out;
}

void __exit atalk_proc_exit(void)
{
	remove_proc_entry("interface", atalk_proc_dir);
	remove_proc_entry("route", atalk_proc_dir);
	remove_proc_entry("socket", atalk_proc_dir);
	remove_proc_entry("arp", atalk_proc_dir);
	remove_proc_entry("atalk", proc_net);
}