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         rxrpc_seq_t tx_hard_ack, rx_hard_ack;
  56         char lbuff[50], rbuff[50];
  57
  58         if (v == &rxrpc_calls) {
  59                 seq_puts(seq,
  60                          "Proto Local                                          "
  61                          " Remote                                         "
  62                          " SvID ConnID   CallID   End Use State    Abort   "
  63                          " UserID\n");
  64                 return 0;
  65         }
  66
  67         call = list_entry(v, struct rxrpc_call, link);
  68
  69         rx = rcu_dereference(call->socket);
  70         if (rx) {
  71                 local = READ_ONCE(rx->local);
  72                 if (local)
  73                         sprintf(lbuff, "%pISpc", &local->srx.transport);
  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, "%pISpc", &peer->srx.transport);
  83         else
  84                 strcpy(rbuff, "no_connection");
  85
  86         tx_hard_ack = READ_ONCE(call->tx_hard_ack);
  87         rx_hard_ack = READ_ONCE(call->rx_hard_ack);
  88         seq_printf(seq,
  89                    "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
  90                    " %-8.8s %08x %lx %08x %02x %08x %02x\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                    tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
 102                    rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack);
 103
 104         return 0;
 105 }
 106
 107 static const struct seq_operations rxrpc_call_seq_ops = {
 108         .start  = rxrpc_call_seq_start,
 109         .next   = rxrpc_call_seq_next,
 110         .stop   = rxrpc_call_seq_stop,
 111         .show   = rxrpc_call_seq_show,
 112 };
 113
 114 static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
 115 {
 116         return seq_open(file, &rxrpc_call_seq_ops);
 117 }
 118
 119 const struct file_operations rxrpc_call_seq_fops = {
 120         .owner          = THIS_MODULE,
 121         .open           = rxrpc_call_seq_open,
 122         .read           = seq_read,
 123         .llseek         = seq_lseek,
 124         .release        = seq_release,
 125 };
 126
 127 /*
 128  * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 129  */
 130 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
 131 {
 132         read_lock(&rxrpc_connection_lock);
 133         return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
 134 }
 135
 136 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
 137                                        loff_t *pos)
 138 {
 139         return seq_list_next(v, &rxrpc_connection_proc_list, pos);
 140 }
 141
 142 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
 143 {
 144         read_unlock(&rxrpc_connection_lock);
 145 }
 146
 147 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
 148 {
 149         struct rxrpc_connection *conn;
 150         char lbuff[50], rbuff[50];
 151
 152         if (v == &rxrpc_connection_proc_list) {
 153                 seq_puts(seq,
 154                          "Proto Local                                          "
 155                          " Remote                                         "
 156                          " SvID ConnID   End Use State    Key     "
 157                          " Serial   ISerial\n"
 158                          );
 159                 return 0;
 160         }
 161
 162         conn = list_entry(v, struct rxrpc_connection, proc_link);
 163         if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
 164                 strcpy(lbuff, "no_local");
 165                 strcpy(rbuff, "no_connection");
 166                 goto print;
 167         }
 168
 169         sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
 170
 171         sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
 172 print:
 173         seq_printf(seq,
 174                    "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
 175                    " %s %08x %08x %08x\n",
 176                    lbuff,
 177                    rbuff,
 178                    conn->params.service_id,
 179                    conn->proto.cid,
 180                    rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
 181                    atomic_read(&conn->usage),
 182                    rxrpc_conn_states[conn->state],
 183                    key_serial(conn->params.key),
 184                    atomic_read(&conn->serial),
 185                    conn->hi_serial);
 186
 187         return 0;
 188 }
 189
 190 static const struct seq_operations rxrpc_connection_seq_ops = {
 191         .start  = rxrpc_connection_seq_start,
 192         .next   = rxrpc_connection_seq_next,
 193         .stop   = rxrpc_connection_seq_stop,
 194         .show   = rxrpc_connection_seq_show,
 195 };
 196
 197
 198 static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
 199 {
 200         return seq_open(file, &rxrpc_connection_seq_ops);
 201 }
 202
 203 const struct file_operations rxrpc_connection_seq_fops = {
 204         .owner          = THIS_MODULE,
 205         .open           = rxrpc_connection_seq_open,
 206         .read           = seq_read,
 207         .llseek         = seq_lseek,
 208         .release        = seq_release,
 209 };