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libbpf: Extract and generalize CPU mask parsing logic

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This logic is re-used for parsing a set of online CPUs. Having it as an
isolated piece of code working with input string makes it conveninent to test
this logic as well. While refactoring, also improve the robustness of original
implementation.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191212013548.1690564-1-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2019-12-11 17:35:48 -08:00
committed by Andrii Nakryiko
parent b234d12c97
commit 33d1fbea57
2 changed files with 89 additions and 44 deletions
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src/libbpf_internal.h
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@@ -95,6 +95,8 @@ static inline bool libbpf_validate_opts(const char *opts,
#define OPTS_GET(opts, field, fallback_value) \
(OPTS_HAS(opts, field) ? (opts)->field : fallback_value)
int parse_cpu_mask_str(const char *s, bool **mask, int *mask_sz);
int parse_cpu_mask_file(const char *fcpu, bool **mask, int *mask_sz);
int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
const char *str_sec, size_t str_len);