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rtnl_link: implement IFLA_INFO_XSTATS decoding

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So far, only CAN provides it.

* rtnl_link.c (decode_nla_linkinfo_xstats_can,
decode_nla_linkinfo_xstats): New function.
(ifla_linkinfo_nla_decoders) <IFLA_INFO_XSTATS>: Use
decode_nla_linkinfo_xstats as a decoder.
This commit is contained in:
Eugene Syromyatnikov 2018-05-18 17:45:33 +02:00 committed by Dmitry V. Levin
parent 7503a0f9e4
commit c95426f6ae
1 changed files with 53 additions and 1 deletions
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54
rtnl_link.c
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@ -229,10 +229,62 @@ decode_nla_linkinfo_kind(struct tcb *const tcp,
return true;
}
bool
decode_nla_linkinfo_xstats_can(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct strace_can_device_stats {
uint32_t bus_error;
uint32_t error_warning;
uint32_t error_passive;
uint32_t bus_off;
uint32_t arbitration_lost;
uint32_t restarts;
} st;
const unsigned int def_size = sizeof(st);
const unsigned int size = (len >= def_size) ? def_size : 0;
if (!size)
return false;
if (umoven_or_printaddr(tcp, addr, size, &st))
return true;
PRINT_FIELD_U("{", st, bus_error);
PRINT_FIELD_U(", ", st, error_warning);
PRINT_FIELD_U(", ", st, error_passive);
PRINT_FIELD_U(", ", st, bus_off);
PRINT_FIELD_U(", ", st, arbitration_lost);
PRINT_FIELD_U(", ", st, restarts);
tprints("}");
return true;
}
bool
decode_nla_linkinfo_xstats(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct ifla_linkinfo_ctx *ctx = (void *) opaque_data;
nla_decoder_t func = NULL;
if (!strcmp(ctx->kind, "can"))
func = decode_nla_linkinfo_xstats_can;
if (func)
return func(tcp, addr, len, opaque_data);
return false;
}
static const nla_decoder_t ifla_linkinfo_nla_decoders[] = {
[IFLA_INFO_KIND] = decode_nla_linkinfo_kind,
[IFLA_INFO_DATA] = NULL, /* unimplemented */
[IFLA_INFO_XSTATS] = NULL, /* unimplemented */
[IFLA_INFO_XSTATS] = decode_nla_linkinfo_xstats,
[IFLA_INFO_SLAVE_KIND] = decode_nla_str,
[IFLA_INFO_SLAVE_DATA] = NULL, /* unimplemented */
};