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         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  34
  35         rcu_read_lock();
  36         read_lock(&rxnet->call_lock);
  37         return seq_list_start_head(&rxnet->calls, *_pos);
  38 }
  39
  40 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  41 {
  42         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  43
  44         return seq_list_next(v, &rxnet->calls, pos);
  45 }
  46
  47 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
  48 {
  49         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  50
  51         read_unlock(&rxnet->call_lock);
  52         rcu_read_unlock();
  53 }
  54
  55 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
  56 {
  57         struct rxrpc_local *local;
  58         struct rxrpc_sock *rx;
  59         struct rxrpc_peer *peer;
  60         struct rxrpc_call *call;
  61         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
  62         rxrpc_seq_t tx_hard_ack, rx_hard_ack;
  63         char lbuff[50], rbuff[50];
  64
  65         if (v == &rxnet->calls) {
  66                 seq_puts(seq,
  67                          "Proto Local                                          "
  68                          " Remote                                         "
  69                          " SvID ConnID   CallID   End Use State    Abort   "
  70                          " UserID\n");
  71                 return 0;
  72         }
  73
  74         call = list_entry(v, struct rxrpc_call, link);
  75
  76         rx = rcu_dereference(call->socket);
  77         if (rx) {
  78                 local = READ_ONCE(rx->local);
  79                 if (local)
  80                         sprintf(lbuff, "%pISpc", &local->srx.transport);
  81                 else
  82                         strcpy(lbuff, "no_local");
  83         } else {
  84                 strcpy(lbuff, "no_socket");
  85         }
  86
  87         peer = call->peer;
  88         if (peer)
  89                 sprintf(rbuff, "%pISpc", &peer->srx.transport);
  90         else
  91                 strcpy(rbuff, "no_connection");
  92
  93         tx_hard_ack = READ_ONCE(call->tx_hard_ack);
  94         rx_hard_ack = READ_ONCE(call->rx_hard_ack);
  95         seq_printf(seq,
  96                    "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
  97                    " %-8.8s %08x %lx %08x %02x %08x %02x\n",
  98                    lbuff,
  99                    rbuff,
 100                    call->service_id,
 101                    call->cid,
 102                    call->call_id,
 103                    rxrpc_is_service_call(call) ? "Svc" : "Clt",
 104                    atomic_read(&call->usage),
 105                    rxrpc_call_states[call->state],
 106                    call->abort_code,
 107                    call->user_call_ID,
 108                    tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
 109                    rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack);
 110
 111         return 0;
 112 }
 113
 114 static const struct seq_operations rxrpc_call_seq_ops = {
 115         .start  = rxrpc_call_seq_start,
 116         .next   = rxrpc_call_seq_next,
 117         .stop   = rxrpc_call_seq_stop,
 118         .show   = rxrpc_call_seq_show,
 119 };
 120
 121 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 122 {
 123         return seq_open_net(inode, file, &rxrpc_call_seq_ops,
 124                             sizeof(struct seq_net_private));
 125 }
 126
 127 const struct file_operations rxrpc_call_seq_fops = {
 128         .open           = rxrpc_call_seq_open,
 129         .read           = seq_read,
 130         .llseek         = seq_lseek,
 131         .release        = seq_release,
 132 };
 133
 134 /*
 135  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 136  */
 137 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 138 {
 139         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 140
 141         read_lock(&rxnet->conn_lock);
 142         return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
 143 }
 144
 145 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 146                                        loff_t *pos)
 147 {
 148         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 149
 150         return seq_list_next(v, &rxnet->conn_proc_list, pos);
 151 }
 152
 153 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 154 {
 155         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 156
 157         read_unlock(&rxnet->conn_lock);
 158 }
 159
 160 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 161 {
 162         struct rxrpc_connection *conn;
 163         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 164         char lbuff[50], rbuff[50];
 165
 166         if (v == &rxnet->conn_proc_list) {
 167                 seq_puts(seq,
 168                          "Proto Local                                          "
 169                          " Remote                                         "
 170                          " SvID ConnID   End Use State    Key     "
 171                          " Serial   ISerial\n"
 172                          );
 173                 return 0;
 174         }
 175
 176         conn = list_entry(v, struct rxrpc_connection, proc_link);
 177         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 178                 strcpy(lbuff, "no_local");
 179                 strcpy(rbuff, "no_connection");
 180                 goto print;
 181         }
 182
 183         sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
 184
 185         sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
 186 print:
 187         seq_printf(seq,
 188                    "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
 189                    " %s %08x %08x %08x\n",
 190                    lbuff,
 191                    rbuff,
 192                    conn->service_id,
 193                    conn->proto.cid,
 194                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 195                    atomic_read(&conn->usage),
 196                    rxrpc_conn_states[conn->state],
 197                    key_serial(conn->params.key),
 198                    atomic_read(&conn->serial),
 199                    conn->hi_serial);
 200
 201         return 0;
 202 }
 203
 204 static const struct seq_operations rxrpc_connection_seq_ops = {
 205         .start  = rxrpc_connection_seq_start,
 206         .next   = rxrpc_connection_seq_next,
 207         .stop   = rxrpc_connection_seq_stop,
 208         .show   = rxrpc_connection_seq_show,
 209 };
 210
 211
 212 static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
 213 {
 214         return seq_open_net(inode, file, &rxrpc_connection_seq_ops,
 215                             sizeof(struct seq_net_private));
 216 }
 217
 218 const struct file_operations rxrpc_connection_seq_fops = {
 219         .open           = rxrpc_connection_seq_open,
 220         .read           = seq_read,
 221         .llseek         = seq_lseek,
 222         .release        = seq_release,
 223 };