337 lines
8.1 KiB
C
337 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* /proc/net/ support for AF_RXRPC
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#include <linux/module.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "ar-internal.h"
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static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
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[RXRPC_CONN_UNUSED] = "Unused ",
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[RXRPC_CONN_CLIENT] = "Client ",
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[RXRPC_CONN_SERVICE_PREALLOC] = "SvPrealc",
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[RXRPC_CONN_SERVICE_UNSECURED] = "SvUnsec ",
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[RXRPC_CONN_SERVICE_CHALLENGING] = "SvChall ",
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[RXRPC_CONN_SERVICE] = "SvSecure",
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[RXRPC_CONN_REMOTELY_ABORTED] = "RmtAbort",
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[RXRPC_CONN_LOCALLY_ABORTED] = "LocAbort",
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};
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/*
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* generate a list of extant and dead calls in /proc/net/rxrpc_calls
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*/
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static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
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__acquires(rcu)
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__acquires(rxnet->call_lock)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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rcu_read_lock();
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read_lock(&rxnet->call_lock);
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return seq_list_start_head(&rxnet->calls, *_pos);
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}
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static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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return seq_list_next(v, &rxnet->calls, pos);
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}
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static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
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__releases(rxnet->call_lock)
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__releases(rcu)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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read_unlock(&rxnet->call_lock);
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rcu_read_unlock();
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}
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static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
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{
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struct rxrpc_local *local;
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struct rxrpc_sock *rx;
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struct rxrpc_peer *peer;
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struct rxrpc_call *call;
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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unsigned long timeout = 0;
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rxrpc_seq_t tx_hard_ack, rx_hard_ack;
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char lbuff[50], rbuff[50];
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if (v == &rxnet->calls) {
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seq_puts(seq,
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"Proto Local "
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" Remote "
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" SvID ConnID CallID End Use State Abort "
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" UserID TxSeq TW RxSeq RW RxSerial RxTimo\n");
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return 0;
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}
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call = list_entry(v, struct rxrpc_call, link);
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rx = rcu_dereference(call->socket);
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if (rx) {
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local = READ_ONCE(rx->local);
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if (local)
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sprintf(lbuff, "%pISpc", &local->srx.transport);
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else
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strcpy(lbuff, "no_local");
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} else {
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strcpy(lbuff, "no_socket");
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}
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peer = call->peer;
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if (peer)
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sprintf(rbuff, "%pISpc", &peer->srx.transport);
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else
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strcpy(rbuff, "no_connection");
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if (call->state != RXRPC_CALL_SERVER_PREALLOC) {
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timeout = READ_ONCE(call->expect_rx_by);
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timeout -= jiffies;
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}
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tx_hard_ack = READ_ONCE(call->tx_hard_ack);
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rx_hard_ack = READ_ONCE(call->rx_hard_ack);
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seq_printf(seq,
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"UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
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" %-8.8s %08x %lx %08x %02x %08x %02x %08x %06lx\n",
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lbuff,
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rbuff,
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call->service_id,
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call->cid,
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call->call_id,
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rxrpc_is_service_call(call) ? "Svc" : "Clt",
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atomic_read(&call->usage),
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rxrpc_call_states[call->state],
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call->abort_code,
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call->user_call_ID,
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tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
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rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack,
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call->rx_serial,
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timeout);
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return 0;
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}
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const struct seq_operations rxrpc_call_seq_ops = {
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.start = rxrpc_call_seq_start,
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.next = rxrpc_call_seq_next,
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.stop = rxrpc_call_seq_stop,
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.show = rxrpc_call_seq_show,
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};
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/*
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* generate a list of extant virtual connections in /proc/net/rxrpc_conns
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*/
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static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
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__acquires(rxnet->conn_lock)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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read_lock(&rxnet->conn_lock);
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return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
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}
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static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
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loff_t *pos)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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return seq_list_next(v, &rxnet->conn_proc_list, pos);
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}
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static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
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__releases(rxnet->conn_lock)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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read_unlock(&rxnet->conn_lock);
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}
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static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
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{
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struct rxrpc_connection *conn;
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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char lbuff[50], rbuff[50];
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if (v == &rxnet->conn_proc_list) {
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seq_puts(seq,
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"Proto Local "
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" Remote "
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" SvID ConnID End Use State Key "
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" Serial ISerial\n"
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);
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return 0;
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}
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conn = list_entry(v, struct rxrpc_connection, proc_link);
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if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
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strcpy(lbuff, "no_local");
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strcpy(rbuff, "no_connection");
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goto print;
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}
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sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
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sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
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print:
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seq_printf(seq,
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"UDP %-47.47s %-47.47s %4x %08x %s %3u"
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" %s %08x %08x %08x %08x %08x %08x %08x\n",
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lbuff,
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rbuff,
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conn->service_id,
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conn->proto.cid,
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rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
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atomic_read(&conn->usage),
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rxrpc_conn_states[conn->state],
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key_serial(conn->params.key),
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atomic_read(&conn->serial),
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conn->hi_serial,
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conn->channels[0].call_id,
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conn->channels[1].call_id,
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conn->channels[2].call_id,
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conn->channels[3].call_id);
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return 0;
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}
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const struct seq_operations rxrpc_connection_seq_ops = {
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.start = rxrpc_connection_seq_start,
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.next = rxrpc_connection_seq_next,
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.stop = rxrpc_connection_seq_stop,
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.show = rxrpc_connection_seq_show,
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};
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/*
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* generate a list of extant virtual peers in /proc/net/rxrpc/peers
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*/
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static int rxrpc_peer_seq_show(struct seq_file *seq, void *v)
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{
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struct rxrpc_peer *peer;
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time64_t now;
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char lbuff[50], rbuff[50];
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if (v == SEQ_START_TOKEN) {
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seq_puts(seq,
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"Proto Local "
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" Remote "
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" Use CW MTU LastUse RTT Rc\n"
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);
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return 0;
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}
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peer = list_entry(v, struct rxrpc_peer, hash_link);
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sprintf(lbuff, "%pISpc", &peer->local->srx.transport);
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sprintf(rbuff, "%pISpc", &peer->srx.transport);
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now = ktime_get_seconds();
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seq_printf(seq,
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"UDP %-47.47s %-47.47s %3u"
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" %3u %5u %6llus %12llu %2u\n",
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lbuff,
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rbuff,
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atomic_read(&peer->usage),
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peer->cong_cwnd,
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peer->mtu,
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now - peer->last_tx_at,
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peer->rtt,
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peer->rtt_cursor);
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return 0;
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}
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static void *rxrpc_peer_seq_start(struct seq_file *seq, loff_t *_pos)
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__acquires(rcu)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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unsigned int bucket, n;
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unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
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void *p;
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rcu_read_lock();
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if (*_pos >= UINT_MAX)
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return NULL;
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n = *_pos & ((1U << shift) - 1);
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bucket = *_pos >> shift;
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for (;;) {
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if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
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*_pos = UINT_MAX;
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return NULL;
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}
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if (n == 0) {
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if (bucket == 0)
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return SEQ_START_TOKEN;
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*_pos += 1;
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n++;
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}
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p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
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if (p)
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return p;
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bucket++;
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n = 1;
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*_pos = (bucket << shift) | n;
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}
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}
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static void *rxrpc_peer_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
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{
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struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
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unsigned int bucket, n;
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unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
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void *p;
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if (*_pos >= UINT_MAX)
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return NULL;
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bucket = *_pos >> shift;
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p = seq_hlist_next_rcu(v, &rxnet->peer_hash[bucket], _pos);
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if (p)
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return p;
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for (;;) {
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bucket++;
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n = 1;
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*_pos = (bucket << shift) | n;
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if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
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*_pos = UINT_MAX;
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return NULL;
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}
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if (n == 0) {
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*_pos += 1;
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n++;
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}
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p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
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if (p)
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return p;
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}
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}
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static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v)
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__releases(rcu)
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{
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rcu_read_unlock();
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}
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const struct seq_operations rxrpc_peer_seq_ops = {
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.start = rxrpc_peer_seq_start,
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.next = rxrpc_peer_seq_next,
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.stop = rxrpc_peer_seq_stop,
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.show = rxrpc_peer_seq_show,
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};
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