1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * X.25 Packet Layer release 002 4 * 5 * This is ALPHA test software. This code may break your machine, 6 * randomly fail to work with new releases, misbehave and/or generally 7 * screw up. It might even work. 8 * 9 * This code REQUIRES 2.4 with seq_file support 10 * 11 * History 12 * 2002/10/06 Arnaldo Carvalho de Melo seq_file support 13 */ 14 15 #include <linux/init.h> 16 #include <linux/proc_fs.h> 17 #include <linux/seq_file.h> 18 #include <linux/export.h> 19 #include <net/net_namespace.h> 20 #include <net/sock.h> 21 #include <net/x25.h> 22 23 #ifdef CONFIG_PROC_FS 24 25 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos) 26 __acquires(x25_route_list_lock) 27 { 28 read_lock_bh(&x25_route_list_lock); 29 return seq_list_start_head(&x25_route_list, *pos); 30 } 31 32 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos) 33 { 34 return seq_list_next(v, &x25_route_list, pos); 35 } 36 37 static void x25_seq_route_stop(struct seq_file *seq, void *v) 38 __releases(x25_route_list_lock) 39 { 40 read_unlock_bh(&x25_route_list_lock); 41 } 42 43 static int x25_seq_route_show(struct seq_file *seq, void *v) 44 { 45 struct x25_route *rt = list_entry(v, struct x25_route, node); 46 47 if (v == &x25_route_list) { 48 seq_puts(seq, "Address Digits Device\n"); 49 goto out; 50 } 51 52 rt = v; 53 seq_printf(seq, "%-15s %-6d %-5s\n", 54 rt->address.x25_addr, rt->sigdigits, 55 rt->dev ? rt->dev->name : "???"); 56 out: 57 return 0; 58 } 59 60 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos) 61 __acquires(x25_list_lock) 62 { 63 read_lock_bh(&x25_list_lock); 64 return seq_hlist_start_head(&x25_list, *pos); 65 } 66 67 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos) 68 { 69 return seq_hlist_next(v, &x25_list, pos); 70 } 71 72 static void x25_seq_socket_stop(struct seq_file *seq, void *v) 73 __releases(x25_list_lock) 74 { 75 read_unlock_bh(&x25_list_lock); 76 } 77 78 static int x25_seq_socket_show(struct seq_file *seq, void *v) 79 { 80 struct sock *s; 81 struct x25_sock *x25; 82 struct net_device *dev; 83 const char *devname; 84 85 if (v == SEQ_START_TOKEN) { 86 seq_printf(seq, "dest_addr src_addr dev lci st vs vr " 87 "va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n"); 88 goto out; 89 } 90 91 s = sk_entry(v); 92 x25 = x25_sk(s); 93 94 if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL) 95 devname = "???"; 96 else 97 devname = x25->neighbour->dev->name; 98 99 seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu " 100 "%3lu %3lu %3lu %5d %5d %ld\n", 101 !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr, 102 !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr, 103 devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr, 104 x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ, 105 x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ, 106 sk_wmem_alloc_get(s), 107 sk_rmem_alloc_get(s), 108 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 109 out: 110 return 0; 111 } 112 113 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos) 114 __acquires(x25_forward_list_lock) 115 { 116 read_lock_bh(&x25_forward_list_lock); 117 return seq_list_start_head(&x25_forward_list, *pos); 118 } 119 120 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos) 121 { 122 return seq_list_next(v, &x25_forward_list, pos); 123 } 124 125 static void x25_seq_forward_stop(struct seq_file *seq, void *v) 126 __releases(x25_forward_list_lock) 127 { 128 read_unlock_bh(&x25_forward_list_lock); 129 } 130 131 static int x25_seq_forward_show(struct seq_file *seq, void *v) 132 { 133 struct x25_forward *f = list_entry(v, struct x25_forward, node); 134 135 if (v == &x25_forward_list) { 136 seq_printf(seq, "lci dev1 dev2\n"); 137 goto out; 138 } 139 140 f = v; 141 142 seq_printf(seq, "%d %-10s %-10s\n", 143 f->lci, f->dev1->name, f->dev2->name); 144 out: 145 return 0; 146 } 147 148 static const struct seq_operations x25_seq_route_ops = { 149 .start = x25_seq_route_start, 150 .next = x25_seq_route_next, 151 .stop = x25_seq_route_stop, 152 .show = x25_seq_route_show, 153 }; 154 155 static const struct seq_operations x25_seq_socket_ops = { 156 .start = x25_seq_socket_start, 157 .next = x25_seq_socket_next, 158 .stop = x25_seq_socket_stop, 159 .show = x25_seq_socket_show, 160 }; 161 162 static const struct seq_operations x25_seq_forward_ops = { 163 .start = x25_seq_forward_start, 164 .next = x25_seq_forward_next, 165 .stop = x25_seq_forward_stop, 166 .show = x25_seq_forward_show, 167 }; 168 169 int __init x25_proc_init(void) 170 { 171 if (!proc_mkdir("x25", init_net.proc_net)) 172 return -ENOMEM; 173 174 if (!proc_create_seq("x25/route", 0444, init_net.proc_net, 175 &x25_seq_route_ops)) 176 goto out; 177 178 if (!proc_create_seq("x25/socket", 0444, init_net.proc_net, 179 &x25_seq_socket_ops)) 180 goto out; 181 182 if (!proc_create_seq("x25/forward", 0444, init_net.proc_net, 183 &x25_seq_forward_ops)) 184 goto out; 185 return 0; 186 187 out: 188 remove_proc_subtree("x25", init_net.proc_net); 189 return -ENOMEM; 190 } 191 192 void __exit x25_proc_exit(void) 193 { 194 remove_proc_subtree("x25", init_net.proc_net); 195 } 196 197 #else /* CONFIG_PROC_FS */ 198 199 int __init x25_proc_init(void) 200 { 201 return 0; 202 } 203 204 void __exit x25_proc_exit(void) 205 { 206 } 207 #endif /* CONFIG_PROC_FS */ 208