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/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink_route.h"
#include "nlattr.h"
#include "netlink.h"
#include <linux/gen_stats.h>
#include <linux/pkt_sched.h>
#include <linux/rtnetlink.h>
#include "xlat/rtnl_tc_attrs.h"
#include "xlat/rtnl_tca_stab_attrs.h"
#include "xlat/rtnl_tca_stats_attrs.h"
static bool
decode_tc_stats(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct tc_stats st;
const unsigned int sizeof_tc_stats =
offsetofend(struct tc_stats, backlog);
if (len < sizeof_tc_stats)
return false;
else if (!umoven_or_printaddr(tcp, addr, sizeof_tc_stats, &st)) {
tprint_struct_begin();
PRINT_FIELD_U(st, bytes);
tprint_struct_next();
PRINT_FIELD_U(st, packets);
tprint_struct_next();
PRINT_FIELD_U(st, drops);
tprint_struct_next();
PRINT_FIELD_U(st, overlimits);
tprint_struct_next();
PRINT_FIELD_U(st, bps);
tprint_struct_next();
PRINT_FIELD_U(st, pps);
tprint_struct_next();
PRINT_FIELD_U(st, qlen);
tprint_struct_next();
PRINT_FIELD_U(st, backlog);
tprint_struct_end();
}
return true;
}
static bool
decode_tc_estimator(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct tc_estimator est;
if (len < sizeof(est))
return false;
else if (!umove_or_printaddr(tcp, addr, &est)) {
tprint_struct_begin();
PRINT_FIELD_D(est, interval);
tprint_struct_next();
PRINT_FIELD_U(est, ewma_log);
tprint_struct_end();
}
return true;
}
static bool
decode_gnet_stats_basic(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct gnet_stats_basic sb;
const unsigned int sizeof_st_basic =
offsetofend(struct gnet_stats_basic, packets);
if (len < sizeof_st_basic)
return false;
else if (!umoven_or_printaddr(tcp, addr, sizeof_st_basic, &sb)) {
tprint_struct_begin();
PRINT_FIELD_U(sb, bytes);
tprint_struct_next();
PRINT_FIELD_U(sb, packets);
tprint_struct_end();
}
return true;
}
static bool
decode_gnet_stats_rate_est(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct gnet_stats_rate_est est;
if (len < sizeof(est))
return false;
else if (!umove_or_printaddr(tcp, addr, &est)) {
tprint_struct_begin();
PRINT_FIELD_U(est, bps);
tprint_struct_next();
PRINT_FIELD_U(est, pps);
tprint_struct_end();
}
return true;
}
static bool
decode_gnet_stats_queue(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct gnet_stats_queue qstats;
if (len < sizeof(qstats))
return false;
else if (!umove_or_printaddr(tcp, addr, &qstats)) {
tprint_struct_begin();
PRINT_FIELD_U(qstats, qlen);
tprint_struct_next();
PRINT_FIELD_U(qstats, backlog);
tprint_struct_next();
PRINT_FIELD_U(qstats, drops);
tprint_struct_next();
PRINT_FIELD_U(qstats, requeues);
tprint_struct_next();
PRINT_FIELD_U(qstats, overlimits);
tprint_struct_end();
}
return true;
}
static bool
decode_gnet_stats_rate_est64(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct gnet_stats_rate_est64 est;
if (len < sizeof(est))
return false;
else if (!umove_or_printaddr(tcp, addr, &est)) {
tprint_struct_begin();
PRINT_FIELD_U(est, bps);
tprint_struct_next();
PRINT_FIELD_U(est, pps);
tprint_struct_end();
}
return true;
}
static const nla_decoder_t tca_stats_nla_decoders[] = {
[TCA_STATS_BASIC] = decode_gnet_stats_basic,
[TCA_STATS_RATE_EST] = decode_gnet_stats_rate_est,
[TCA_STATS_QUEUE] = decode_gnet_stats_queue,
[TCA_STATS_APP] = NULL, /* unimplemented */
[TCA_STATS_RATE_EST64] = decode_gnet_stats_rate_est64,
[TCA_STATS_PAD] = NULL,
[TCA_STATS_BASIC_HW] = decode_gnet_stats_basic,
[TCA_STATS_PKT64] = decode_nla_u64,
};
bool
decode_nla_tc_stats(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
decode_nlattr(tcp, addr, len, rtnl_tca_stats_attrs, "TCA_STATS_???",
tca_stats_nla_decoders,
ARRAY_SIZE(tca_stats_nla_decoders), opaque_data);
return true;
}
static bool
decode_tc_sizespec(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct tc_sizespec s;
if (len < sizeof(s))
return false;
else if (!umove_or_printaddr(tcp, addr, &s)) {
tprint_struct_begin();
PRINT_FIELD_U(s, cell_log);
tprint_struct_next();
PRINT_FIELD_U(s, size_log);
tprint_struct_next();
PRINT_FIELD_D(s, cell_align);
tprint_struct_next();
PRINT_FIELD_D(s, overhead);
tprint_struct_next();
PRINT_FIELD_U(s, linklayer);
tprint_struct_next();
PRINT_FIELD_U(s, mpu);
tprint_struct_next();
PRINT_FIELD_U(s, mtu);
tprint_struct_next();
PRINT_FIELD_U(s, tsize);
tprint_struct_end();
}
return true;
}
static bool
print_stab_data(struct tcb *const tcp, void *const elem_buf,
const size_t elem_size, void *const opaque_data)
{
PRINT_VAL_U(*(uint16_t *) elem_buf);
return true;
}
static bool
decode_tca_stab_data(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
uint16_t data;
const size_t nmemb = len / sizeof(data);
if (!nmemb)
return false;
print_array(tcp, addr, nmemb, &data, sizeof(data),
tfetch_mem, print_stab_data, NULL);
return true;
}
static const nla_decoder_t tca_stab_nla_decoders[] = {
[TCA_STAB_BASE] = decode_tc_sizespec,
[TCA_STAB_DATA] = decode_tca_stab_data
};
static bool
decode_tca_stab(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
decode_nlattr(tcp, addr, len, rtnl_tca_stab_attrs, "TCA_STAB_???",
tca_stab_nla_decoders,
ARRAY_SIZE(tca_stab_nla_decoders), opaque_data);
return true;
}
static const nla_decoder_t tcmsg_nla_decoders[] = {
[TCA_KIND] = decode_nla_str,
[TCA_OPTIONS] = NULL, /* unimplemented */
[TCA_STATS] = decode_tc_stats,
[TCA_XSTATS] = NULL, /* unimplemented */
[TCA_RATE] = decode_tc_estimator,
[TCA_FCNT] = decode_nla_u32,
[TCA_STATS2] = decode_nla_tc_stats,
[TCA_STAB] = decode_tca_stab,
[TCA_PAD] = NULL,
[TCA_DUMP_INVISIBLE] = NULL,
[TCA_CHAIN] = decode_nla_u32,
[TCA_HW_OFFLOAD] = decode_nla_u8,
[TCA_INGRESS_BLOCK] = decode_nla_u32,
[TCA_EGRESS_BLOCK] = decode_nla_u32,
[TCA_DUMP_FLAGS] = decode_nla_u32,
[TCA_EXT_WARN_MSG] = decode_nla_str,
};
DECL_NETLINK_ROUTE_DECODER(decode_tcmsg)
{
struct tcmsg tcmsg = { .tcm_family = family };
size_t offset = sizeof(tcmsg.tcm_family);
bool decode_nla = false;
tprint_struct_begin();
PRINT_FIELD_XVAL(tcmsg, tcm_family, addrfams, "AF_???");
tprint_struct_next();
if (len >= sizeof(tcmsg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(tcmsg) - offset,
(char *) &tcmsg + offset)) {
PRINT_FIELD_IFINDEX(tcmsg, tcm_ifindex);
tprint_struct_next();
PRINT_FIELD_U(tcmsg, tcm_handle);
tprint_struct_next();
PRINT_FIELD_U(tcmsg, tcm_parent);
tprint_struct_next();
PRINT_FIELD_U(tcmsg, tcm_info);
decode_nla = true;
}
} else
tprint_more_data_follows();
tprint_struct_end();
offset = NLMSG_ALIGN(sizeof(tcmsg));
if (decode_nla && len > offset) {
tprint_array_next();
decode_nlattr(tcp, addr + offset, len - offset,
rtnl_tc_attrs, "TCA_???", tcmsg_nla_decoders,
ARRAY_SIZE(tcmsg_nla_decoders), NULL);
}
}
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