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libbpf: Add libbpf support to batch ops

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Added four libbpf API functions to support map batch operations:
  . int bpf_map_delete_batch( ... )
  . int bpf_map_lookup_batch( ... )
  . int bpf_map_lookup_and_delete_batch( ... )
  . int bpf_map_update_batch( ... )

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200115184308.162644-8-brianvv@google.com
This commit is contained in:
Yonghong Song
2020-01-15 10:43:06 -08:00
committed by Andrii Nakryiko
parent 1e51491d05
commit d91f681d3b
3 changed files with 84 additions and 0 deletions
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22
src/bpf.h
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@@ -127,6 +127,28 @@ LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
LIBBPF_API int bpf_map_freeze(int fd);
struct bpf_map_batch_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u64 elem_flags;
__u64 flags;
};
#define bpf_map_batch_opts__last_field flags
LIBBPF_API int bpf_map_delete_batch(int fd, void *keys,
__u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch,
void *keys, void *values, __u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_lookup_and_delete_batch(int fd, void *in_batch,
void *out_batch, void *keys,
void *values, __u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_update_batch(int fd, void *keys, void *values,
__u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
LIBBPF_API int bpf_obj_get(const char *pathname);