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[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];
  56
  57         if (v == &rxrpc_calls) {
  58                 seq_puts(seq,
  59                          "Proto Local                  Remote                "
  60                          " SvID ConnID   CallID   End Use State    Abort   "
  61                          " UserID\n");
  62                 return 0;
  63         }
  64
  65         call = list_entry(v, struct rxrpc_call, link);
  66
  67         rx = rcu_dereference(call->socket);
  68         if (rx) {
  69                 local = READ_ONCE(rx->local);
  70                 if (local)
  71                         sprintf(lbuff, "%pI4:%u",
  72                                 &local->srx.transport.sin.sin_addr,
  73                                 ntohs(local->srx.transport.sin.sin_port));
  74                 else
  75                         strcpy(lbuff, "no_local");
  76         } else {
  77                 strcpy(lbuff, "no_socket");
  78         }
  79
  80         peer = call->peer;
  81         if (peer)
  82                 sprintf(rbuff, "%pI4:%u",
  83                         &peer->srx.transport.sin.sin_addr,
  84                         ntohs(peer->srx.transport.sin.sin_port));
  85         else
  86                 strcpy(rbuff, "no_connection");
  87
  88         seq_printf(seq,
  89                    "UDP   %-22.22s %-22.22s %4x %08x %08x %s %3u"
  90                    " %-8.8s %08x %lx\n",
  91                    lbuff,
  92                    rbuff,
  93                    call->service_id,
  94                    call->cid,
  95                    call->call_id,
  96                    rxrpc_is_service_call(call) ? "Svc" : "Clt",
  97                    atomic_read(&call->usage),
  98                    rxrpc_call_states[call->state],
  99                    call->abort_code,
 100                    call->user_call_ID);
 101
 102         return 0;
 103 }
 104
 105 static const struct seq_operations rxrpc_call_seq_ops = {
 106         .start  = rxrpc_call_seq_start,
 107         .next   = rxrpc_call_seq_next,
 108         .stop   = rxrpc_call_seq_stop,
 109         .show   = rxrpc_call_seq_show,
 110 };
 111
 112 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 113 {
 114         return seq_open(file, &rxrpc_call_seq_ops);
 115 }
 116
 117 const struct file_operations rxrpc_call_seq_fops = {
 118         .owner          = THIS_MODULE,
 119         .open           = rxrpc_call_seq_open,
 120         .read           = seq_read,
 121         .llseek         = seq_lseek,
 122         .release        = seq_release,
 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 {
 130         read_lock(&rxrpc_connection_lock);
 131         return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
 132 }
 133
 134 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 135                                        loff_t *pos)
 136 {
 137         return seq_list_next(v, &rxrpc_connection_proc_list, pos);
 138 }
 139
 140 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 141 {
 142         read_unlock(&rxrpc_connection_lock);
 143 }
 144
 145 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 146 {
 147         struct rxrpc_connection *conn;
 148         char lbuff[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];
 149
 150         if (v == &rxrpc_connection_proc_list) {
 151                 seq_puts(seq,
 152                          "Proto Local                  Remote                "
 153                          " SvID ConnID   End Use State    Key     "
 154                          " Serial   ISerial\n"
 155                          );
 156                 return 0;
 157         }
 158
 159         conn = list_entry(v, struct rxrpc_connection, proc_link);
 160         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 161                 strcpy(lbuff, "no_local");
 162                 strcpy(rbuff, "no_connection");
 163                 goto print;
 164         }
 165
 166         sprintf(lbuff, "%pI4:%u",
 167                 &conn->params.local->srx.transport.sin.sin_addr,
 168                 ntohs(conn->params.local->srx.transport.sin.sin_port));
 169
 170         sprintf(rbuff, "%pI4:%u",
 171                 &conn->params.peer->srx.transport.sin.sin_addr,
 172                 ntohs(conn->params.peer->srx.transport.sin.sin_port));
 173 print:
 174         seq_printf(seq,
 175                    "UDP   %-22.22s %-22.22s %4x %08x %s %3u"
 176                    " %s %08x %08x %08x\n",
 177                    lbuff,
 178                    rbuff,
 179                    conn->params.service_id,
 180                    conn->proto.cid,
 181                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 182                    atomic_read(&conn->usage),
 183                    rxrpc_conn_states[conn->state],
 184                    key_serial(conn->params.key),
 185                    atomic_read(&conn->serial),
 186                    conn->hi_serial);
 187
 188         return 0;
 189 }
 190
 191 static const struct seq_operations rxrpc_connection_seq_ops = {
 192         .start  = rxrpc_connection_seq_start,
 193         .next   = rxrpc_connection_seq_next,
 194         .stop   = rxrpc_connection_seq_stop,
 195         .show   = rxrpc_connection_seq_show,
 196 };
 197
 198
 199 static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
 200 {
 201         return seq_open(file, &rxrpc_connection_seq_ops);
 202 }
 203
 204 const struct file_operations rxrpc_connection_seq_fops = {
 205         .owner          = THIS_MODULE,
 206         .open           = rxrpc_connection_seq_open,
 207         .read           = seq_read,
 208         .llseek         = seq_lseek,
 209         .release        = seq_release,
 210 };