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6e663ffdf7
Implement bpf_task_work_schedule_* with an implicit bpf_prog_aux argument, and remove corresponding _impl funcs from the kernel. Update special kfunc checks in the verifier accordingly. Update the selftests to use the new API with implicit argument. Reviewed-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20260120222638.3976562-10-ihor.solodrai@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
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#include <vmlinux.h>
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#include <string.h>
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#include <stdbool.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "bpf_misc.h"
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#define ENTRIES 128
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char _license[] SEC("license") = "GPL";
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__u64 callback_scheduled = 0;
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__u64 callback_success = 0;
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__u64 schedule_error = 0;
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__u64 delete_success = 0;
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struct elem {
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__u32 count;
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struct bpf_task_work tw;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__uint(max_entries, ENTRIES);
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__type(key, int);
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__type(value, struct elem);
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} hmap SEC(".maps");
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static int process_work(struct bpf_map *map, void *key, void *value)
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{
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__sync_fetch_and_add(&callback_success, 1);
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return 0;
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}
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SEC("syscall")
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int schedule_task_work(void *ctx)
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{
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struct elem empty_work = {.count = 0};
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struct elem *work;
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int key = 0, err;
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key = bpf_ktime_get_ns() % ENTRIES;
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work = bpf_map_lookup_elem(&hmap, &key);
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if (!work) {
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bpf_map_update_elem(&hmap, &key, &empty_work, BPF_NOEXIST);
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work = bpf_map_lookup_elem(&hmap, &key);
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if (!work)
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return 0;
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}
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err = bpf_task_work_schedule_signal(bpf_get_current_task_btf(), &work->tw, &hmap,
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process_work);
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if (err)
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__sync_fetch_and_add(&schedule_error, 1);
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else
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__sync_fetch_and_add(&callback_scheduled, 1);
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return 0;
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}
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SEC("syscall")
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int delete_task_work(void *ctx)
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{
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int key = 0, err;
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key = bpf_get_prandom_u32() % ENTRIES;
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err = bpf_map_delete_elem(&hmap, &key);
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if (!err)
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__sync_fetch_and_add(&delete_success, 1);
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return 0;
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}
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