ar-proc.c

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/* /proc/net/ support for AF_RXRPC
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/module.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include "ar-internal.h"

static const char *const rxrpc_conn_states[] = {
    [RXRPC_CONN_UNUSED]     = "Unused  ",
    [RXRPC_CONN_CLIENT]     = "Client  ",
    [RXRPC_CONN_SERVER_UNSECURED]   = "SvUnsec ",
    [RXRPC_CONN_SERVER_CHALLENGING] = "SvChall ",
    [RXRPC_CONN_SERVER]     = "SvSecure",
    [RXRPC_CONN_REMOTELY_ABORTED]   = "RmtAbort",
    [RXRPC_CONN_LOCALLY_ABORTED]    = "LocAbort",
    [RXRPC_CONN_NETWORK_ERROR]  = "NetError",
};

/*
 * generate a list of extant and dead calls in /proc/net/rxrpc_calls
 */
static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
{
    read_lock(&rxrpc_call_lock);
    return seq_list_start_head(&rxrpc_calls, *_pos);
}

static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
    return seq_list_next(v, &rxrpc_calls, pos);
}

static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
{
    read_unlock(&rxrpc_call_lock);
}

static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
{
    struct rxrpc_transport *trans;
    struct rxrpc_call *call;
    char lbuff[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];

    if (v == &rxrpc_calls) {
        seq_puts(seq,
             "Proto Local                  Remote                "
             " SvID ConnID   CallID   End Use State    Abort   "
             " UserID\n");
        return 0;
    }

    call = list_entry(v, struct rxrpc_call, link);
    trans = call->conn->trans;

    sprintf(lbuff, "%pI4:%u",
        &trans->local->srx.transport.sin.sin_addr,
        ntohs(trans->local->srx.transport.sin.sin_port));

    sprintf(rbuff, "%pI4:%u",
        &trans->peer->srx.transport.sin.sin_addr,
        ntohs(trans->peer->srx.transport.sin.sin_port));

    seq_printf(seq,
           "UDP   %-22.22s %-22.22s %4x %08x %08x %s %3u"
           " %-8.8s %08x %lx\n",
           lbuff,
           rbuff,
           ntohs(call->conn->service_id),
           ntohl(call->conn->cid),
           ntohl(call->call_id),
           call->conn->in_clientflag ? "Svc" : "Clt",
           atomic_read(&call->usage),
           rxrpc_call_states[call->state],
           call->abort_code,
           call->user_call_ID);

    return 0;
}

static const struct seq_operations rxrpc_call_seq_ops = {
    .start  = rxrpc_call_seq_start,
    .next   = rxrpc_call_seq_next,
    .stop   = rxrpc_call_seq_stop,
    .show   = rxrpc_call_seq_show,
};

static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
{
    return seq_open(file, &rxrpc_call_seq_ops);
}

const struct file_operations rxrpc_call_seq_fops = {
    .owner      = THIS_MODULE,
    .open       = rxrpc_call_seq_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};

/*
 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
 */
static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
{
    read_lock(&rxrpc_connection_lock);
    return seq_list_start_head(&rxrpc_connections, *_pos);
}

static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
                       loff_t *pos)
{
    return seq_list_next(v, &rxrpc_connections, pos);
}

static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
{
    read_unlock(&rxrpc_connection_lock);
}

static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
{
    struct rxrpc_connection *conn;
    struct rxrpc_transport *trans;
    char lbuff[4 + 4 + 4 + 4 + 5 + 1], rbuff[4 + 4 + 4 + 4 + 5 + 1];

    if (v == &rxrpc_connections) {
        seq_puts(seq,
             "Proto Local                  Remote                "
             " SvID ConnID   Calls    End Use State    Key     "
             " Serial   ISerial\n"
             );
        return 0;
    }

    conn = list_entry(v, struct rxrpc_connection, link);
    trans = conn->trans;

    sprintf(lbuff, "%pI4:%u",
        &trans->local->srx.transport.sin.sin_addr,
        ntohs(trans->local->srx.transport.sin.sin_port));

    sprintf(rbuff, "%pI4:%u",
        &trans->peer->srx.transport.sin.sin_addr,
        ntohs(trans->peer->srx.transport.sin.sin_port));

    seq_printf(seq,
           "UDP   %-22.22s %-22.22s %4x %08x %08x %s %3u"
           " %s %08x %08x %08x\n",
           lbuff,
           rbuff,
           ntohs(conn->service_id),
           ntohl(conn->cid),
           conn->call_counter,
           conn->in_clientflag ? "Svc" : "Clt",
           atomic_read(&conn->usage),
           rxrpc_conn_states[conn->state],
           key_serial(conn->key),
           atomic_read(&conn->serial),
           atomic_read(&conn->hi_serial));

    return 0;
}

static const struct seq_operations rxrpc_connection_seq_ops = {
    .start  = rxrpc_connection_seq_start,
    .next   = rxrpc_connection_seq_next,
    .stop   = rxrpc_connection_seq_stop,
    .show   = rxrpc_connection_seq_show,
};


static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
{
    return seq_open(file, &rxrpc_connection_seq_ops);
}

const struct file_operations rxrpc_connection_seq_fops = {
    .owner      = THIS_MODULE,
    .open       = rxrpc_connection_seq_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};