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         __acquires(rcu)
  33         __acquires(rxnet->call_lock)
  34 {
  35         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  36
  37         rcu_read_lock();
  38         read_lock(&rxnet->call_lock);
  39         return seq_list_start_head(&rxnet->calls, *_pos);
  40 }
  41
  42 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  43 {
  44         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  45
  46         return seq_list_next(v, &rxnet->calls, pos);
  47 }
  48
  49 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
  50         __releases(rxnet->call_lock)
  51         __releases(rcu)
  52 {
  53         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  54
  55         read_unlock(&rxnet->call_lock);
  56         rcu_read_unlock();
  57 }
  58
  59 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
  60 {
  61         struct rxrpc_local *local;
  62         struct rxrpc_sock *rx;
  63         struct rxrpc_peer *peer;
  64         struct rxrpc_call *call;
  65         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  66         rxrpc_seq_t tx_hard_ack, rx_hard_ack;
  67         char lbuff[50], rbuff[50];
  68
  69         if (v == &rxnet->calls) {
  70                 seq_puts(seq,
  71                          "Proto Local                                          "
  72                          " Remote                                         "
  73                          " SvID ConnID   CallID   End Use State    Abort   "
  74                          " UserID\n");
  75                 return 0;
  76         }
  77
  78         call = list_entry(v, struct rxrpc_call, link);
  79
  80         rx = rcu_dereference(call->socket);
  81         if (rx) {
  82                 local = READ_ONCE(rx->local);
  83                 if (local)
  84                         sprintf(lbuff, "%pISpc", &local->srx.transport);
  85                 else
  86                         strcpy(lbuff, "no_local");
  87         } else {
  88                 strcpy(lbuff, "no_socket");
  89         }
  90
  91         peer = call->peer;
  92         if (peer)
  93                 sprintf(rbuff, "%pISpc", &peer->srx.transport);
  94         else
  95                 strcpy(rbuff, "no_connection");
  96
  97         tx_hard_ack = READ_ONCE(call->tx_hard_ack);
  98         rx_hard_ack = READ_ONCE(call->rx_hard_ack);
  99         seq_printf(seq,
 100                    "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
 101                    " %-8.8s %08x %lx %08x %02x %08x %02x\n",
 102                    lbuff,
 103                    rbuff,
 104                    call->service_id,
 105                    call->cid,
 106                    call->call_id,
 107                    rxrpc_is_service_call(call) ? "Svc" : "Clt",
 108                    atomic_read(&call->usage),
 109                    rxrpc_call_states[call->state],
 110                    call->abort_code,
 111                    call->user_call_ID,
 112                    tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
 113                    rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack);
 114
 115         return 0;
 116 }
 117
 118 const struct seq_operations rxrpc_call_seq_ops = {
 119         .start  = rxrpc_call_seq_start,
 120         .next   = rxrpc_call_seq_next,
 121         .stop   = rxrpc_call_seq_stop,
 122         .show   = rxrpc_call_seq_show,
 123 };
 124
 125 /*
 126  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 127  */
 128 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 129         __acquires(rxnet->conn_lock)
 130 {
 131         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 132
 133         read_lock(&rxnet->conn_lock);
 134         return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
 135 }
 136
 137 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 138                                        loff_t *pos)
 139 {
 140         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 141
 142         return seq_list_next(v, &rxnet->conn_proc_list, pos);
 143 }
 144
 145 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 146         __releases(rxnet->conn_lock)
 147 {
 148         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 149
 150         read_unlock(&rxnet->conn_lock);
 151 }
 152
 153 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 154 {
 155         struct rxrpc_connection *conn;
 156         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 157         char lbuff[50], rbuff[50];
 158
 159         if (v == &rxnet->conn_proc_list) {
 160                 seq_puts(seq,
 161                          "Proto Local                                          "
 162                          " Remote                                         "
 163                          " SvID ConnID   End Use State    Key     "
 164                          " Serial   ISerial\n"
 165                          );
 166                 return 0;
 167         }
 168
 169         conn = list_entry(v, struct rxrpc_connection, proc_link);
 170         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 171                 strcpy(lbuff, "no_local");
 172                 strcpy(rbuff, "no_connection");
 173                 goto print;
 174         }
 175
 176         sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
 177
 178         sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
 179 print:
 180         seq_printf(seq,
 181                    "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
 182                    " %s %08x %08x %08x\n",
 183                    lbuff,
 184                    rbuff,
 185                    conn->service_id,
 186                    conn->proto.cid,
 187                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 188                    atomic_read(&conn->usage),
 189                    rxrpc_conn_states[conn->state],
 190                    key_serial(conn->params.key),
 191                    atomic_read(&conn->serial),
 192                    conn->hi_serial);
 193
 194         return 0;
 195 }
 196
 197 const struct seq_operations rxrpc_connection_seq_ops = {
 198         .start  = rxrpc_connection_seq_start,
 199         .next   = rxrpc_connection_seq_next,
 200         .stop   = rxrpc_connection_seq_stop,
 201         .show   = rxrpc_connection_seq_show,
 202 };