net/rxrpc/proc.c

   1 /* /proc/net/ support for AF_RXRPC
   2  *
   3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <net/sock.h>
  14 #include <net/af_rxrpc.h>
  15 #include "ar-internal.h"
  16
  17 static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
  18         [RXRPC_CONN_UNUSED]                     = "Unused  ",
  19         [RXRPC_CONN_CLIENT]                     = "Client  ",
  20         [RXRPC_CONN_SERVICE_PREALLOC]           = "SvPrealc",
  21         [RXRPC_CONN_SERVICE_UNSECURED]          = "SvUnsec ",
  22         [RXRPC_CONN_SERVICE_CHALLENGING]        = "SvChall ",
  23         [RXRPC_CONN_SERVICE]                    = "SvSecure",
  24         [RXRPC_CONN_REMOTELY_ABORTED]           = "RmtAbort",
  25         [RXRPC_CONN_LOCALLY_ABORTED]            = "LocAbort",
  26 };
  27
  28 /*
  29  * generate a list of extant and dead calls in /proc/net/rxrpc_calls
  30  */
  31 static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
  32 {
  33         rcu_read_lock();
  34         read_lock(&rxrpc_call_lock);
  35         return seq_list_start_head(&rxrpc_calls, *_pos);
  36 }
  37
  38 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  39 {
  40         return seq_list_next(v, &rxrpc_calls, pos);
  41 }
  42
  43 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
  44 {
  45         read_unlock(&rxrpc_call_lock);
  46         rcu_read_unlock();
  47 }
  48
  49 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
  50 {
  51         struct rxrpc_local *local;
  52         struct rxrpc_sock *rx;
  53         struct rxrpc_peer *peer;
  54         struct rxrpc_call *call;
  55         char lbuff[50], rbuff[50];
  56
  57         if (v == &rxrpc_calls) {
  58                 seq_puts(seq,
  59                          "Proto Local                                          "
  60                          " Remote                                         "
  61                          " SvID ConnID   CallID   End Use State    Abort   "
  62                          " UserID\n");
  63                 return 0;
  64         }
  65
  66         call = list_entry(v, struct rxrpc_call, link);
  67
  68         rx = rcu_dereference(call->socket);
  69         if (rx) {
  70                 local = READ_ONCE(rx->local);
  71                 if (local)
  72                         sprintf(lbuff, "%pISpc", &local->srx.transport);
  73                 else
  74                         strcpy(lbuff, "no_local");
  75         } else {
  76                 strcpy(lbuff, "no_socket");
  77         }
  78
  79         peer = call->peer;
  80         if (peer)
  81                 sprintf(rbuff, "%pISpc", &peer->srx.transport);
  82         else
  83                 strcpy(rbuff, "no_connection");
  84
  85         seq_printf(seq,
  86                    "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
  87                    " %-8.8s %08x %lx\n",
  88                    lbuff,
  89                    rbuff,
  90                    call->service_id,
  91                    call->cid,
  92                    call->call_id,
  93                    rxrpc_is_service_call(call) ? "Svc" : "Clt",
  94                    atomic_read(&call->usage),
  95                    rxrpc_call_states[call->state],
  96                    call->abort_code,
  97                    call->user_call_ID);
  98
  99         return 0;
 100 }
 101
 102 static const struct seq_operations rxrpc_call_seq_ops = {
 103         .start  = rxrpc_call_seq_start,
 104         .next   = rxrpc_call_seq_next,
 105         .stop   = rxrpc_call_seq_stop,
 106         .show   = rxrpc_call_seq_show,
 107 };
 108
 109 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 110 {
 111         return seq_open(file, &rxrpc_call_seq_ops);
 112 }
 113
 114 const struct file_operations rxrpc_call_seq_fops = {
 115         .owner          = THIS_MODULE,
 116         .open           = rxrpc_call_seq_open,
 117         .read           = seq_read,
 118         .llseek         = seq_lseek,
 119         .release        = seq_release,
 120 };
 121
 122 /*
 123  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 124  */
 125 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 126 {
 127         read_lock(&rxrpc_connection_lock);
 128         return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
 129 }
 130
 131 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 132                                        loff_t *pos)
 133 {
 134         return seq_list_next(v, &rxrpc_connection_proc_list, pos);
 135 }
 136
 137 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 138 {
 139         read_unlock(&rxrpc_connection_lock);
 140 }
 141
 142 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 143 {
 144         struct rxrpc_connection *conn;
 145         char lbuff[50], rbuff[50];
 146
 147         if (v == &rxrpc_connection_proc_list) {
 148                 seq_puts(seq,
 149                          "Proto Local                                          "
 150                          " Remote                                         "
 151                          " SvID ConnID   End Use State    Key     "
 152                          " Serial   ISerial\n"
 153                          );
 154                 return 0;
 155         }
 156
 157         conn = list_entry(v, struct rxrpc_connection, proc_link);
 158         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 159                 strcpy(lbuff, "no_local");
 160                 strcpy(rbuff, "no_connection");
 161                 goto print;
 162         }
 163
 164         sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
 165
 166         sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
 167 print:
 168         seq_printf(seq,
 169                    "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
 170                    " %s %08x %08x %08x\n",
 171                    lbuff,
 172                    rbuff,
 173                    conn->params.service_id,
 174                    conn->proto.cid,
 175                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 176                    atomic_read(&conn->usage),
 177                    rxrpc_conn_states[conn->state],
 178                    key_serial(conn->params.key),
 179                    atomic_read(&conn->serial),
 180                    conn->hi_serial);
 181
 182         return 0;
 183 }
 184
 185 static const struct seq_operations rxrpc_connection_seq_ops = {
 186         .start  = rxrpc_connection_seq_start,
 187         .next   = rxrpc_connection_seq_next,
 188         .stop   = rxrpc_connection_seq_stop,
 189         .show   = rxrpc_connection_seq_show,
 190 };
 191
 192
 193 static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
 194 {
 195         return seq_open(file, &rxrpc_connection_seq_ops);
 196 }
 197
 198 const struct file_operations rxrpc_connection_seq_fops = {
 199         .owner          = THIS_MODULE,
 200         .open           = rxrpc_connection_seq_open,
 201         .read           = seq_read,
 202         .llseek         = seq_lseek,
 203         .release        = seq_release,
 204 };