Hengqi Chen
596c9a2d77
libbpf: Add btf__type_cnt() and btf__raw_data() APIs
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Add btf__type_cnt() and btf__raw_data() APIs and deprecate
btf__get_nr_type() and btf__get_raw_data() since the old APIs
don't follow the libbpf naming convention for getters which
omit 'get' in the name (see [0]). btf__raw_data() is just an
alias to the existing btf__get_raw_data(). btf__type_cnt()
now returns the number of all types of the BTF object
including 'void'.
[0] Closes: https://github.com/libbpf/libbpf/issues/279
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Link: https://lore.kernel.org/bpf/20211022130623.1548429-2-hengqi.chen@gmail.com
2021-10-22 18:38:55 -07:00
Hengqi Chen
19c6144c09
bpf: Add bpf_skc_to_unix_sock() helper
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The helper is used in tracing programs to cast a socket
pointer to a unix_sock pointer.
The return value could be NULL if the casting is illegal.
Suggested-by: Yonghong Song <yhs@fb.com >
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
Acked-by: Song Liu <songliubraving@fb.com >
Link: https://lore.kernel.org/bpf/20211021134752.1223426-2-hengqi.chen@gmail.com
2021-10-22 18:38:55 -07:00
Hengqi Chen
d3169df794
libbpf: Deprecate bpf_{map,program}__{prev,next} APIs since v0.7
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Deprecate bpf_{map,program}__{prev,next} APIs. Replace them with
a new set of APIs named bpf_object__{prev,next}_{program,map} which
follow the libbpf API naming convention ([0]). No functionality changes.
[0] Closes: https://github.com/libbpf/libbpf/issues/296
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Acked-by: Song Liu <songliubraving@fb.com >
Link: https://lore.kernel.org/bpf/20211003165844.4054931-2-hengqi.chen@gmail.com
2021-10-06 14:40:18 -07:00
Hengqi Chen
d665ca0bb0
libbpf: Deprecate bpf_object__unload() API since v0.6
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BPF objects are not reloadable after unload. Users are expected to use
bpf_object__close() to unload and free up resources in one operation.
No need to expose bpf_object__unload() as a public API, deprecate it
([0]). Add bpf_object__unload() as an alias to internal
bpf_object_unload() and replace all bpf_object__unload() uses to avoid
compilation errors.
[0] Closes: https://github.com/libbpf/libbpf/issues/290
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Acked-by: Song Liu <songliubraving@fb.com >
Link: https://lore.kernel.org/bpf/20211002161000.3854559-1-hengqi.chen@gmail.com
2021-10-06 14:40:18 -07:00
Hengqi Chen
962f241379
libbpf: Support uniform BTF-defined key/value specification across all BPF maps
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A bunch of BPF maps do not support specifying BTF types for key and value.
This is non-uniform and inconvenient[0]. Currently, libbpf uses a retry
logic which removes BTF type IDs when BPF map creation failed. Instead
of retrying, this commit recognizes those specialized maps and removes
BTF type IDs when creating BPF map.
[0] Closes: https://github.com/libbpf/libbpf/issues/355
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Link: https://lore.kernel.org/bpf/20210930161456.3444544-2-hengqi.chen@gmail.com
2021-10-06 14:40:18 -07:00
Hengqi Chen
e65d128903
libbpf: Add btf__load_vmlinux_btf/btf__load_module_btf
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Add two new APIs: btf__load_vmlinux_btf and btf__load_module_btf.
btf__load_vmlinux_btf is just an alias to the existing API named
libbpf_find_kernel_btf, rename to be more precisely and consistent
with existing BTF APIs. btf__load_module_btf can be used to load
module BTF, add it for completeness. These two APIs are useful for
implementing tracing tools and introspection tools. This is part
of the effort towards libbpf 1.0 ([0]).
[0] Closes: https://github.com/libbpf/libbpf/issues/280
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Link: https://lore.kernel.org/bpf/20210730114012.494408-1-hengqi.chen@gmail.com
2021-08-04 18:27:12 -07:00
Hengqi Chen
d4beac571a
libbpf: Fix KERNEL_VERSION macro
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Add missing ')' for KERNEL_VERSION macro.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com >
Signed-off-by: Andrii Nakryiko <andrii@kernel.org >
Link: https://lore.kernel.org/bpf/20210405040119.802188-1-hengqi.chen@gmail.com
2021-04-05 11:30:05 -07:00
Hengqi Chen