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Linux/net/appletalk/atalk_proc.c

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  1 /*
  2  *      atalk_proc.c - proc support for Appletalk
  3  *
  4  *      Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  5  *
  6  *      This program is free software; you can redistribute it and/or modify it
  7  *      under the terms of the GNU General Public License as published by the
  8  *      Free Software Foundation, version 2.
  9  */
 10 
 11 #include <linux/init.h>
 12 #include <linux/proc_fs.h>
 13 #include <linux/seq_file.h>
 14 #include <net/net_namespace.h>
 15 #include <net/sock.h>
 16 #include <linux/atalk.h>
 17 #include <linux/export.h>
 18 
 19 
 20 static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
 21 {
 22         struct atalk_iface *i;
 23 
 24         for (i = atalk_interfaces; pos && i; i = i->next)
 25                 --pos;
 26 
 27         return i;
 28 }
 29 
 30 static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
 31         __acquires(atalk_interfaces_lock)
 32 {
 33         loff_t l = *pos;
 34 
 35         read_lock_bh(&atalk_interfaces_lock);
 36         return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
 37 }
 38 
 39 static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
 40 {
 41         struct atalk_iface *i;
 42 
 43         ++*pos;
 44         if (v == SEQ_START_TOKEN) {
 45                 i = NULL;
 46                 if (atalk_interfaces)
 47                         i = atalk_interfaces;
 48                 goto out;
 49         }
 50         i = v;
 51         i = i->next;
 52 out:
 53         return i;
 54 }
 55 
 56 static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
 57         __releases(atalk_interfaces_lock)
 58 {
 59         read_unlock_bh(&atalk_interfaces_lock);
 60 }
 61 
 62 static int atalk_seq_interface_show(struct seq_file *seq, void *v)
 63 {
 64         struct atalk_iface *iface;
 65 
 66         if (v == SEQ_START_TOKEN) {
 67                 seq_puts(seq, "Interface        Address   Networks  "
 68                               "Status\n");
 69                 goto out;
 70         }
 71 
 72         iface = v;
 73         seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
 74                    iface->dev->name, ntohs(iface->address.s_net),
 75                    iface->address.s_node, ntohs(iface->nets.nr_firstnet),
 76                    ntohs(iface->nets.nr_lastnet), iface->status);
 77 out:
 78         return 0;
 79 }
 80 
 81 static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
 82 {
 83         struct atalk_route *r;
 84 
 85         for (r = atalk_routes; pos && r; r = r->next)
 86                 --pos;
 87 
 88         return r;
 89 }
 90 
 91 static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
 92         __acquires(atalk_routes_lock)
 93 {
 94         loff_t l = *pos;
 95 
 96         read_lock_bh(&atalk_routes_lock);
 97         return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
 98 }
 99 
100 static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
101 {
102         struct atalk_route *r;
103 
104         ++*pos;
105         if (v == SEQ_START_TOKEN) {
106                 r = NULL;
107                 if (atalk_routes)
108                         r = atalk_routes;
109                 goto out;
110         }
111         r = v;
112         r = r->next;
113 out:
114         return r;
115 }
116 
117 static void atalk_seq_route_stop(struct seq_file *seq, void *v)
118         __releases(atalk_routes_lock)
119 {
120         read_unlock_bh(&atalk_routes_lock);
121 }
122 
123 static int atalk_seq_route_show(struct seq_file *seq, void *v)
124 {
125         struct atalk_route *rt;
126 
127         if (v == SEQ_START_TOKEN) {
128                 seq_puts(seq, "Target        Router  Flags Dev\n");
129                 goto out;
130         }
131 
132         if (atrtr_default.dev) {
133                 rt = &atrtr_default;
134                 seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
135                                ntohs(rt->gateway.s_net), rt->gateway.s_node,
136                                rt->flags, rt->dev->name);
137         }
138 
139         rt = v;
140         seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
141                    ntohs(rt->target.s_net), rt->target.s_node,
142                    ntohs(rt->gateway.s_net), rt->gateway.s_node,
143                    rt->flags, rt->dev->name);
144 out:
145         return 0;
146 }
147 
148 static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
149         __acquires(atalk_sockets_lock)
150 {
151         read_lock_bh(&atalk_sockets_lock);
152         return seq_hlist_start_head(&atalk_sockets, *pos);
153 }
154 
155 static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
156 {
157         return seq_hlist_next(v, &atalk_sockets, pos);
158 }
159 
160 static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
161         __releases(atalk_sockets_lock)
162 {
163         read_unlock_bh(&atalk_sockets_lock);
164 }
165 
166 static int atalk_seq_socket_show(struct seq_file *seq, void *v)
167 {
168         struct sock *s;
169         struct atalk_sock *at;
170 
171         if (v == SEQ_START_TOKEN) {
172                 seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
173                                 "Rx_queue St UID\n");
174                 goto out;
175         }
176 
177         s = sk_entry(v);
178         at = at_sk(s);
179 
180         seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
181                         "%02X %u\n",
182                    s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
183                    ntohs(at->dest_net), at->dest_node, at->dest_port,
184                    sk_wmem_alloc_get(s),
185                    sk_rmem_alloc_get(s),
186                    s->sk_state,
187                    from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
188 out:
189         return 0;
190 }
191 
192 static const struct seq_operations atalk_seq_interface_ops = {
193         .start  = atalk_seq_interface_start,
194         .next   = atalk_seq_interface_next,
195         .stop   = atalk_seq_interface_stop,
196         .show   = atalk_seq_interface_show,
197 };
198 
199 static const struct seq_operations atalk_seq_route_ops = {
200         .start  = atalk_seq_route_start,
201         .next   = atalk_seq_route_next,
202         .stop   = atalk_seq_route_stop,
203         .show   = atalk_seq_route_show,
204 };
205 
206 static const struct seq_operations atalk_seq_socket_ops = {
207         .start  = atalk_seq_socket_start,
208         .next   = atalk_seq_socket_next,
209         .stop   = atalk_seq_socket_stop,
210         .show   = atalk_seq_socket_show,
211 };
212 
213 static int atalk_seq_interface_open(struct inode *inode, struct file *file)
214 {
215         return seq_open(file, &atalk_seq_interface_ops);
216 }
217 
218 static int atalk_seq_route_open(struct inode *inode, struct file *file)
219 {
220         return seq_open(file, &atalk_seq_route_ops);
221 }
222 
223 static int atalk_seq_socket_open(struct inode *inode, struct file *file)
224 {
225         return seq_open(file, &atalk_seq_socket_ops);
226 }
227 
228 static const struct file_operations atalk_seq_interface_fops = {
229         .owner          = THIS_MODULE,
230         .open           = atalk_seq_interface_open,
231         .read           = seq_read,
232         .llseek         = seq_lseek,
233         .release        = seq_release,
234 };
235 
236 static const struct file_operations atalk_seq_route_fops = {
237         .owner          = THIS_MODULE,
238         .open           = atalk_seq_route_open,
239         .read           = seq_read,
240         .llseek         = seq_lseek,
241         .release        = seq_release,
242 };
243 
244 static const struct file_operations atalk_seq_socket_fops = {
245         .owner          = THIS_MODULE,
246         .open           = atalk_seq_socket_open,
247         .read           = seq_read,
248         .llseek         = seq_lseek,
249         .release        = seq_release,
250 };
251 
252 static struct proc_dir_entry *atalk_proc_dir;
253 
254 int __init atalk_proc_init(void)
255 {
256         struct proc_dir_entry *p;
257         int rc = -ENOMEM;
258 
259         atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
260         if (!atalk_proc_dir)
261                 goto out;
262 
263         p = proc_create("interface", S_IRUGO, atalk_proc_dir,
264                         &atalk_seq_interface_fops);
265         if (!p)
266                 goto out_interface;
267 
268         p = proc_create("route", S_IRUGO, atalk_proc_dir,
269                         &atalk_seq_route_fops);
270         if (!p)
271                 goto out_route;
272 
273         p = proc_create("socket", S_IRUGO, atalk_proc_dir,
274                         &atalk_seq_socket_fops);
275         if (!p)
276                 goto out_socket;
277 
278         p = proc_create("arp", S_IRUGO, atalk_proc_dir, &atalk_seq_arp_fops);
279         if (!p)
280                 goto out_arp;
281 
282         rc = 0;
283 out:
284         return rc;
285 out_arp:
286         remove_proc_entry("socket", atalk_proc_dir);
287 out_socket:
288         remove_proc_entry("route", atalk_proc_dir);
289 out_route:
290         remove_proc_entry("interface", atalk_proc_dir);
291 out_interface:
292         remove_proc_entry("atalk", init_net.proc_net);
293         goto out;
294 }
295 
296 void __exit atalk_proc_exit(void)
297 {
298         remove_proc_entry("interface", atalk_proc_dir);
299         remove_proc_entry("route", atalk_proc_dir);
300         remove_proc_entry("socket", atalk_proc_dir);
301         remove_proc_entry("arp", atalk_proc_dir);
302         remove_proc_entry("atalk", init_net.proc_net);
303 }
304 

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