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 static 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 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 126 {
 127         return seq_open_net(inode, file, &rxrpc_call_seq_ops,
 128                             sizeof(struct seq_net_private));
 129 }
 130
 131 const struct file_operations rxrpc_call_seq_fops = {
 132         .open           = rxrpc_call_seq_open,
 133         .read           = seq_read,
 134         .llseek         = seq_lseek,
 135         .release        = seq_release,
 136 };
 137
 138 /*
 139  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 140  */
 141 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 142         __acquires(rxnet->conn_lock)
 143 {
 144         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 145
 146         read_lock(&rxnet->conn_lock);
 147         return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
 148 }
 149
 150 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 151                                        loff_t *pos)
 152 {
 153         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 154
 155         return seq_list_next(v, &rxnet->conn_proc_list, pos);
 156 }
 157
 158 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 159         __releases(rxnet->conn_lock)
 160 {
 161         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 162
 163         read_unlock(&rxnet->conn_lock);
 164 }
 165
 166 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 167 {
 168         struct rxrpc_connection *conn;
 169         struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
 170         char lbuff[50], rbuff[50];
 171
 172         if (v == &rxnet->conn_proc_list) {
 173                 seq_puts(seq,
 174                          "Proto Local                                          "
 175                          " Remote                                         "
 176                          " SvID ConnID   End Use State    Key     "
 177                          " Serial   ISerial\n"
 178                          );
 179                 return 0;
 180         }
 181
 182         conn = list_entry(v, struct rxrpc_connection, proc_link);
 183         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 184                 strcpy(lbuff, "no_local");
 185                 strcpy(rbuff, "no_connection");
 186                 goto print;
 187         }
 188
 189         sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
 190
 191         sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
 192 print:
 193         seq_printf(seq,
 194                    "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
 195                    " %s %08x %08x %08x\n",
 196                    lbuff,
 197                    rbuff,
 198                    conn->service_id,
 199                    conn->proto.cid,
 200                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 201                    atomic_read(&conn->usage),
 202                    rxrpc_conn_states[conn->state],
 203                    key_serial(conn->params.key),
 204                    atomic_read(&conn->serial),
 205                    conn->hi_serial);
 206
 207         return 0;
 208 }
 209
 210 static const struct seq_operations rxrpc_connection_seq_ops = {
 211         .start  = rxrpc_connection_seq_start,
 212         .next   = rxrpc_connection_seq_next,
 213         .stop   = rxrpc_connection_seq_stop,
 214         .show   = rxrpc_connection_seq_show,
 215 };
 216
 217
 218 static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
 219 {
 220         return seq_open_net(inode, file, &rxrpc_connection_seq_ops,
 221                             sizeof(struct seq_net_private));
 222 }
 223
 224 const struct file_operations rxrpc_connection_seq_fops = {
 225         .open           = rxrpc_connection_seq_open,
 226         .read           = seq_read,
 227         .llseek         = seq_lseek,
 228         .release        = seq_release,
 229 };