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2024-01-24bpf: Add BPF token support to BPF_PROG_LOAD commandAndrii Nakryiko
Add basic support of BPF token to BPF_PROG_LOAD. BPF_F_TOKEN_FD flag should be set in prog_flags field when providing prog_token_fd. Wire through a set of allowed BPF program types and attach types, derived from BPF FS at BPF token creation time. Then make sure we perform bpf_token_capable() checks everywhere where it's relevant. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20240124022127.2379740-7-andrii@kernel.org
2024-01-24bpf: Add BPF token support to BPF_MAP_CREATE commandAndrii Nakryiko
Allow providing token_fd for BPF_MAP_CREATE command to allow controlled BPF map creation from unprivileged process through delegated BPF token. New BPF_F_TOKEN_FD flag is added to specify together with BPF token FD for BPF_MAP_CREATE command. Wire through a set of allowed BPF map types to BPF token, derived from BPF FS at BPF token creation time. This, in combination with allowed_cmds allows to create a narrowly-focused BPF token (controlled by privileged agent) with a restrictive set of BPF maps that application can attempt to create. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20240124022127.2379740-5-andrii@kernel.org
2023-12-19Revert BPF token-related functionalityAndrii Nakryiko
This patch includes the following revert (one conflicting BPF FS patch and three token patch sets, represented by merge commits): - revert 0f5d5454c723 "Merge branch 'bpf-fs-mount-options-parsing-follow-ups'"; - revert 750e785796bb "bpf: Support uid and gid when mounting bpffs"; - revert 733763285acf "Merge branch 'bpf-token-support-in-libbpf-s-bpf-object'"; - revert c35919dcce28 "Merge branch 'bpf-token-and-bpf-fs-based-delegation'". Link: https://lore.kernel.org/bpf/CAHk-=wg7JuFYwGy=GOMbRCtOL+jwSQsdUaBsRWkDVYbxipbM5A@mail.gmail.com Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
2023-12-06bpf: rename MAX_BPF_LINK_TYPE into __MAX_BPF_LINK_TYPE for consistencyAndrii Nakryiko
To stay consistent with the naming pattern used for similar cases in BPF UAPI (__MAX_BPF_ATTACH_TYPE, etc), rename MAX_BPF_LINK_TYPE into __MAX_BPF_LINK_TYPE. Also similar to MAX_BPF_ATTACH_TYPE and MAX_BPF_REG, add: #define MAX_BPF_LINK_TYPE __MAX_BPF_LINK_TYPE Not all __MAX_xxx enums have such #define, so I'm not sure if we should add it or not, but I figured I'll start with a completely backwards compatible way, and we can drop that, if necessary. Also adjust a selftest that used MAX_BPF_LINK_TYPE enum. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20231206190920.1651226-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-12-06bpf: add BPF token support to BPF_PROG_LOAD commandAndrii Nakryiko
Add basic support of BPF token to BPF_PROG_LOAD. Wire through a set of allowed BPF program types and attach types, derived from BPF FS at BPF token creation time. Then make sure we perform bpf_token_capable() checks everywhere where it's relevant. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20231130185229.2688956-7-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-12-06bpf: add BPF token support to BPF_MAP_CREATE commandAndrii Nakryiko
Allow providing token_fd for BPF_MAP_CREATE command to allow controlled BPF map creation from unprivileged process through delegated BPF token. Wire through a set of allowed BPF map types to BPF token, derived from BPF FS at BPF token creation time. This, in combination with allowed_cmds allows to create a narrowly-focused BPF token (controlled by privileged agent) with a restrictive set of BPF maps that application can attempt to create. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20231130185229.2688956-5-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-09-08bpf: Mark BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE deprecatedYonghong Song
Now 'BPF_MAP_TYPE_CGRP_STORAGE + local percpu ptr' can cover all BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE functionality and more. So mark BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE deprecated. Also make changes in selftests/bpf/test_bpftool_synctypes.py and selftest libbpf_str to fix otherwise test errors. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20230827152837.2003563-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-10-25selftests/bpf: Fix test test_libbpf_str/bpf_map_type_strYonghong Song
Previous bpf patch made a change to uapi bpf.h like @@ -922,7 +922,14 @@ enum bpf_map_type { BPF_MAP_TYPE_SOCKHASH, - BPF_MAP_TYPE_CGROUP_STORAGE, + BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED, + BPF_MAP_TYPE_CGROUP_STORAGE = BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED, BPF_MAP_TYPE_REUSEPORT_SOCKARRAY, where BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED and BPF_MAP_TYPE_CGROUP_STORAGE have the same enum value. This will cause selftest test_libbpf_str/bpf_map_type_str failing. This patch fixed the issue by avoid the check for BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED in the test. Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20221026042906.674830-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-02selftests/bpf: Add test for libbpf_bpf_link_type_strDaniel Müller
This change adds a test for libbpf_bpf_link_type_str. The test retrieves all variants of the bpf_link_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-12-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_attach_type_strDaniel Müller
This change adds a test for libbpf_bpf_attach_type_str. The test retrieves all variants of the bpf_attach_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-9-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_map_type_strDaniel Müller
This change adds a test for libbpf_bpf_map_type_str. The test retrieves all variants of the bpf_map_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-6-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_prog_type_strDaniel Müller
This change adds a test for libbpf_bpf_prog_type_str. The test retrieves all variants of the bpf_prog_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-3-deso@posteo.net
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