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