From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- samples/bpf/ibumad_kern.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 samples/bpf/ibumad_kern.c (limited to 'samples/bpf/ibumad_kern.c') diff --git a/samples/bpf/ibumad_kern.c b/samples/bpf/ibumad_kern.c new file mode 100644 index 000000000..3a91b4c19 --- /dev/null +++ b/samples/bpf/ibumad_kern.c @@ -0,0 +1,138 @@ +// 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 + +#include + + +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"; -- cgit v1.2.3