diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/cpumask_common.h')
-rw-r--r-- | tools/testing/selftests/bpf/progs/cpumask_common.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/cpumask_common.h b/tools/testing/selftests/bpf/progs/cpumask_common.h new file mode 100644 index 0000000000..b15c588ace --- /dev/null +++ b/tools/testing/selftests/bpf/progs/cpumask_common.h @@ -0,0 +1,121 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */ + +#ifndef _CPUMASK_COMMON_H +#define _CPUMASK_COMMON_H + +#include "errno.h" +#include <stdbool.h> + +int err; + +#define private(name) SEC(".bss." #name) __hidden __attribute__((aligned(8))) +private(MASK) static struct bpf_cpumask __kptr * global_mask; + +struct __cpumask_map_value { + struct bpf_cpumask __kptr * cpumask; +}; + +struct array_map { + __uint(type, BPF_MAP_TYPE_ARRAY); + __type(key, int); + __type(value, struct __cpumask_map_value); + __uint(max_entries, 1); +} __cpumask_map SEC(".maps"); + +struct bpf_cpumask *bpf_cpumask_create(void) __ksym; +void bpf_cpumask_release(struct bpf_cpumask *cpumask) __ksym; +struct bpf_cpumask *bpf_cpumask_acquire(struct bpf_cpumask *cpumask) __ksym; +u32 bpf_cpumask_first(const struct cpumask *cpumask) __ksym; +u32 bpf_cpumask_first_zero(const struct cpumask *cpumask) __ksym; +u32 bpf_cpumask_first_and(const struct cpumask *src1, + const struct cpumask *src2) __ksym; +void bpf_cpumask_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; +void bpf_cpumask_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; +bool bpf_cpumask_test_cpu(u32 cpu, const struct cpumask *cpumask) __ksym; +bool bpf_cpumask_test_and_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; +bool bpf_cpumask_test_and_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; +void bpf_cpumask_setall(struct bpf_cpumask *cpumask) __ksym; +void bpf_cpumask_clear(struct bpf_cpumask *cpumask) __ksym; +bool bpf_cpumask_and(struct bpf_cpumask *cpumask, + const struct cpumask *src1, + const struct cpumask *src2) __ksym; +void bpf_cpumask_or(struct bpf_cpumask *cpumask, + const struct cpumask *src1, + const struct cpumask *src2) __ksym; +void bpf_cpumask_xor(struct bpf_cpumask *cpumask, + const struct cpumask *src1, + const struct cpumask *src2) __ksym; +bool bpf_cpumask_equal(const struct cpumask *src1, const struct cpumask *src2) __ksym; +bool bpf_cpumask_intersects(const struct cpumask *src1, const struct cpumask *src2) __ksym; +bool bpf_cpumask_subset(const struct cpumask *src1, const struct cpumask *src2) __ksym; +bool bpf_cpumask_empty(const struct cpumask *cpumask) __ksym; +bool bpf_cpumask_full(const struct cpumask *cpumask) __ksym; +void bpf_cpumask_copy(struct bpf_cpumask *dst, const struct cpumask *src) __ksym; +u32 bpf_cpumask_any_distribute(const struct cpumask *src) __ksym; +u32 bpf_cpumask_any_and_distribute(const struct cpumask *src1, const struct cpumask *src2) __ksym; + +void bpf_rcu_read_lock(void) __ksym; +void bpf_rcu_read_unlock(void) __ksym; + +static inline const struct cpumask *cast(struct bpf_cpumask *cpumask) +{ + return (const struct cpumask *)cpumask; +} + +static inline struct bpf_cpumask *create_cpumask(void) +{ + struct bpf_cpumask *cpumask; + + cpumask = bpf_cpumask_create(); + if (!cpumask) { + err = 1; + return NULL; + } + + if (!bpf_cpumask_empty(cast(cpumask))) { + err = 2; + bpf_cpumask_release(cpumask); + return NULL; + } + + return cpumask; +} + +static inline struct __cpumask_map_value *cpumask_map_value_lookup(void) +{ + u32 key = 0; + + return bpf_map_lookup_elem(&__cpumask_map, &key); +} + +static inline int cpumask_map_insert(struct bpf_cpumask *mask) +{ + struct __cpumask_map_value local, *v; + long status; + struct bpf_cpumask *old; + u32 key = 0; + + local.cpumask = NULL; + status = bpf_map_update_elem(&__cpumask_map, &key, &local, 0); + if (status) { + bpf_cpumask_release(mask); + return status; + } + + v = bpf_map_lookup_elem(&__cpumask_map, &key); + if (!v) { + bpf_cpumask_release(mask); + return -ENOENT; + } + + old = bpf_kptr_xchg(&v->cpumask, mask); + if (old) { + bpf_cpumask_release(old); + return -EEXIST; + } + + return 0; +} + +#endif /* _CPUMASK_COMMON_H */ |