139 lines
3.0 KiB
C
139 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
|
|
|
|
/**
|
|
* ibumad BPF sample kernel side
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*
|
|
* Copyright(c) 2018 Ira Weiny, Intel Corporation
|
|
*/
|
|
|
|
#define KBUILD_MODNAME "ibumad_count_pkts_by_class"
|
|
#include <uapi/linux/bpf.h>
|
|
|
|
#include "bpf_helpers.h"
|
|
|
|
|
|
struct bpf_map_def SEC("maps") read_count = {
|
|
.type = BPF_MAP_TYPE_ARRAY,
|
|
.key_size = sizeof(u32), /* class; u32 required */
|
|
.value_size = sizeof(u64), /* count of mads read */
|
|
.max_entries = 256, /* Room for all Classes */
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") write_count = {
|
|
.type = BPF_MAP_TYPE_ARRAY,
|
|
.key_size = sizeof(u32), /* class; u32 required */
|
|
.value_size = sizeof(u64), /* count of mads written */
|
|
.max_entries = 256, /* Room for all Classes */
|
|
};
|
|
|
|
#undef DEBUG
|
|
#ifndef DEBUG
|
|
#undef bpf_printk
|
|
#define bpf_printk(fmt, ...)
|
|
#endif
|
|
|
|
/* Taken from the current format defined in
|
|
* include/trace/events/ib_umad.h
|
|
* and
|
|
* /sys/kernel/debug/tracing/events/ib_umad/ib_umad_read/format
|
|
* /sys/kernel/debug/tracing/events/ib_umad/ib_umad_write/format
|
|
*/
|
|
struct ib_umad_rw_args {
|
|
u64 pad;
|
|
u8 port_num;
|
|
u8 sl;
|
|
u8 path_bits;
|
|
u8 grh_present;
|
|
u32 id;
|
|
u32 status;
|
|
u32 timeout_ms;
|
|
u32 retires;
|
|
u32 length;
|
|
u32 qpn;
|
|
u32 qkey;
|
|
u8 gid_index;
|
|
u8 hop_limit;
|
|
u16 lid;
|
|
u16 attr_id;
|
|
u16 pkey_index;
|
|
u8 base_version;
|
|
u8 mgmt_class;
|
|
u8 class_version;
|
|
u8 method;
|
|
u32 flow_label;
|
|
u16 mad_status;
|
|
u16 class_specific;
|
|
u32 attr_mod;
|
|
u64 tid;
|
|
u8 gid[16];
|
|
u32 dev_index;
|
|
u8 traffic_class;
|
|
};
|
|
|
|
SEC("tracepoint/ib_umad/ib_umad_read_recv")
|
|
int on_ib_umad_read_recv(struct ib_umad_rw_args *ctx)
|
|
{
|
|
u64 zero = 0, *val;
|
|
u8 class = ctx->mgmt_class;
|
|
|
|
bpf_printk("ib_umad read recv : class 0x%x\n", class);
|
|
|
|
val = bpf_map_lookup_elem(&read_count, &class);
|
|
if (!val) {
|
|
bpf_map_update_elem(&read_count, &class, &zero, BPF_NOEXIST);
|
|
val = bpf_map_lookup_elem(&read_count, &class);
|
|
if (!val)
|
|
return 0;
|
|
}
|
|
|
|
(*val) += 1;
|
|
|
|
return 0;
|
|
}
|
|
SEC("tracepoint/ib_umad/ib_umad_read_send")
|
|
int on_ib_umad_read_send(struct ib_umad_rw_args *ctx)
|
|
{
|
|
u64 zero = 0, *val;
|
|
u8 class = ctx->mgmt_class;
|
|
|
|
bpf_printk("ib_umad read send : class 0x%x\n", class);
|
|
|
|
val = bpf_map_lookup_elem(&read_count, &class);
|
|
if (!val) {
|
|
bpf_map_update_elem(&read_count, &class, &zero, BPF_NOEXIST);
|
|
val = bpf_map_lookup_elem(&read_count, &class);
|
|
if (!val)
|
|
return 0;
|
|
}
|
|
|
|
(*val) += 1;
|
|
|
|
return 0;
|
|
}
|
|
SEC("tracepoint/ib_umad/ib_umad_write")
|
|
int on_ib_umad_write(struct ib_umad_rw_args *ctx)
|
|
{
|
|
u64 zero = 0, *val;
|
|
u8 class = ctx->mgmt_class;
|
|
|
|
bpf_printk("ib_umad write : class 0x%x\n", class);
|
|
|
|
val = bpf_map_lookup_elem(&write_count, &class);
|
|
if (!val) {
|
|
bpf_map_update_elem(&write_count, &class, &zero, BPF_NOEXIST);
|
|
val = bpf_map_lookup_elem(&write_count, &class);
|
|
if (!val)
|
|
return 0;
|
|
}
|
|
|
|
(*val) += 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|