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_UNSECURED]          = "SvUnsec ",
  21         [RXRPC_CONN_SERVICE_CHALLENGING]        = "SvChall ",
  22         [RXRPC_CONN_SERVICE]                    = "SvSecure",
  23         [RXRPC_CONN_REMOTELY_ABORTED]           = "RmtAbort",
  24         [RXRPC_CONN_LOCALLY_ABORTED]            = "LocAbort",
  25 };
  26
  27 /*
  28  * generate a list of extant and dead calls in /proc/net/rxrpc_calls
  29  */
  30 static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
  31 {
  32         rcu_read_lock();
  33         read_lock(&rxrpc_call_lock);
  34         return seq_list_start_head(&rxrpc_calls, *_pos);
  35 }
  36
  37 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  38 {
  39         return seq_list_next(v, &rxrpc_calls, pos);
  40 }
  41
  42 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
  43 {
  44         read_unlock(&rxrpc_call_lock);
  45         rcu_read_unlock();
  46 }
  47
  48 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
  49 {
  50         struct rxrpc_local *local;
  51         struct rxrpc_sock *rx;
  52         struct rxrpc_peer *peer;
  53         struct rxrpc_call *call;
  54         char lbuff[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];
  55
  56         if (v == &rxrpc_calls) {
  57                 seq_puts(seq,
  58                          "Proto Local                  Remote                "
  59                          " SvID ConnID   CallID   End Use State    Abort   "
  60                          " UserID\n");
  61                 return 0;
  62         }
  63
  64         call = list_entry(v, struct rxrpc_call, link);
  65
  66         rx = rcu_dereference(call->socket);
  67         if (rx) {
  68                 local = READ_ONCE(rx->local);
  69                 if (local)
  70                         sprintf(lbuff, "%pI4:%u",
  71                                 &local->srx.transport.sin.sin_addr,
  72                                 ntohs(local->srx.transport.sin.sin_port));
  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, "%pI4:%u",
  82                         &peer->srx.transport.sin.sin_addr,
  83                         ntohs(peer->srx.transport.sin.sin_port));
  84         else
  85                 strcpy(rbuff, "no_connection");
  86
  87         seq_printf(seq,
  88                    "UDP   %-22.22s %-22.22s %4x %08x %08x %s %3u"
  89                    " %-8.8s %08x %lx\n",
  90                    lbuff,
  91                    rbuff,
  92                    call->service_id,
  93                    call->cid,
  94                    call->call_id,
  95                    rxrpc_is_service_call(call) ? "Svc" : "Clt",
  96                    atomic_read(&call->usage),
  97                    rxrpc_call_states[call->state],
  98                    call->abort_code,
  99                    call->user_call_ID);
 100
 101         return 0;
 102 }
 103
 104 static const struct seq_operations rxrpc_call_seq_ops = {
 105         .start  = rxrpc_call_seq_start,
 106         .next   = rxrpc_call_seq_next,
 107         .stop   = rxrpc_call_seq_stop,
 108         .show   = rxrpc_call_seq_show,
 109 };
 110
 111 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 112 {
 113         return seq_open(file, &rxrpc_call_seq_ops);
 114 }
 115
 116 const struct file_operations rxrpc_call_seq_fops = {
 117         .owner          = THIS_MODULE,
 118         .open           = rxrpc_call_seq_open,
 119         .read           = seq_read,
 120         .llseek         = seq_lseek,
 121         .release        = seq_release,
 122 };
 123
 124 /*
 125  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 126  */
 127 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 128 {
 129         read_lock(&rxrpc_connection_lock);
 130         return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
 131 }
 132
 133 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 134                                        loff_t *pos)
 135 {
 136         return seq_list_next(v, &rxrpc_connection_proc_list, pos);
 137 }
 138
 139 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 140 {
 141         read_unlock(&rxrpc_connection_lock);
 142 }
 143
 144 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 145 {
 146         struct rxrpc_connection *conn;
 147         char lbuff[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];
 148
 149         if (v == &rxrpc_connection_proc_list) {
 150                 seq_puts(seq,
 151                          "Proto Local                  Remote                "
 152                          " SvID ConnID   End Use State    Key     "
 153                          " Serial   ISerial\n"
 154                          );
 155                 return 0;
 156         }
 157
 158         conn = list_entry(v, struct rxrpc_connection, proc_link);
 159
 160         sprintf(lbuff, "%pI4:%u",
 161                 &conn->params.local->srx.transport.sin.sin_addr,
 162                 ntohs(conn->params.local->srx.transport.sin.sin_port));
 163
 164         sprintf(rbuff, "%pI4:%u",
 165                 &conn->params.peer->srx.transport.sin.sin_addr,
 166                 ntohs(conn->params.peer->srx.transport.sin.sin_port));
 167
 168         seq_printf(seq,
 169                    "UDP   %-22.22s %-22.22s %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 };