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strace is now provided under the terms of the GNU Lesser General
Public License version 2.1 or later, see COPYING for more details.
strace test suite is now provided under the terms of the GNU General
Public License version 2 or later, see tests/COPYING for more details.
Our policy is that all fields of type uint64_t in this header file
must have this attribute.
This shouldn't cause any contradictions with <linux/bpf.h>
unless the latter is buggy.
By word "buggy" I mean containing such changes as Linux kernel commit
v4.16-rc1~123^2~109^2~5^2~4.
* bpf_attr.h (struct BPF_MAP_UPDATE_ELEM_struct): Add
ATTRIBUTE_ALIGNED(8) to "flags" field.
(struct bpf_prog_info_struct): Add ATTRIBUTE_ALIGNED(8) to "load_time"
field.
* bpf_attr.h [!BPF_TAG_SIZE] (BPF_TAG_SIZE): Define.
[BPF_TAG_SIZE]: Check that BPF_TAG_SIZE is 8.
(struct bpf_map_info_struct, struct bpf_prog_info_struct): New
structures.
(bpf_map_info_struct_size, expected_bpf_map_info_struct_size,
bpf_prog_info_struct_size, expected_bpf_prog_info_struct_size): New
macro constants.
* bpf.c (print_bpf_obj_info_fn): New type.
(print_bpf_map_info, print_bpf_prog_info, fetch_bpf_obj_info,
print_bpf_obj_info_addr, print_bpf_obj_info): New functions.
(BEGIN_BPF_CMD_DECODER(BPF_OBJ_GET_INFO_BY_FD)): Print bpf_fd and info_len
fields only on entering, call print_bpf_obj_info for printing info field.
* tests/bpf.c (BPF_OBJ_GET_INFO_BY_FD_checks): Print info field
as a pointer.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* bpf.c (BEGIN_BPF_CMD_DECODER(BPF_MAP_CREATE)): Decode map_name
and map_ifindex fields that were added in Linux commits
v4.15-rc1~84^2~605^2~3 and v4.16-rc1~123^2~145^2~5^2~8, respectively.
* bpf_attr.h (struct BPF_MAP_CREATE_struct): Add map_name
and map_ifindex fields.
* tests/bpf.c (init_BPF_MAP_CREATE_attr7): New function.
(BPF_MAP_CREATE_checks): Remove const qualifier, add two more checks.
BPF_PROG_QUERY was introduced in Linux commit v4.15-rc1~84^2~558^2~6.
* xlat/bpf_commands.in (BPF_PROG_QUERY): New constant.
* xlat/bpf_query_flags.in: New file.
* bpf.c: Include it.
(DECL_BPF_CMD_DECODER): Add priv argument for passing tcb private data.
(BEGIN_BPF_CMD_DECODER(BPF_PROG_QUERY)): New function.
(SYS_FUNC(bpf)) <bpf_cmd_decoders>: Add BPF_PROG_QUERY entry.
(SYS_FUNC(bpf)): Fetch buf on entering and exiting, pass buf on exiting,
retrieve private data on exiting, pass it to decoder as well, explicitly
rework rc handling logic for size argument printing.
* bpf_attr.h (struct BPF_PROG_QUERY_struct): New structure declaration.
(BPF_PROG_QUERY_struct_size, expected_BPF_PROG_QUERY_struct_size): New
macro.
* tests/bpf.c: Add checks for BPF_PROG_QUERY command.
* bpf.c (BEGIN_BPF_CMD_DECODER(BPF_PROG_LOAD)): Add support for decoding
of prog_name (introduced in Linux commit v4.15-rc1~84^2~605^2~4) and
prog_ifindex (introduced as prog_target_ifindex in v4.15-rc1~84^2~127^2~13,
renamed in v4.15-rc1~15^2~5^2~3^2~7).
* bpf_attr.h [!BPF_OBJ_NAME_LEN] (BPF_OBJ_NAME_LEN): New macro constant.
[BPF_OBJ_NAME_LEN]: Check that BPF_OBJ_NAME_LEN is equal to 16.
(struct BPF_PROG_LOAD_struct): Add prog_name and prog_ifindex fields.
(BPF_PROG_LOAD_struct_size, expected_BPF_PROG_LOAD_struct_size): Update.
* tests/bpf.c (init_BPF_PROG_LOAD_attr): Rename
to init_BPF_PROG_LOAD_attr3.
(print_BPF_PROG_LOAD_attr): Rename to print_BPF_PROG_LOAD_attr3.
(init_BPF_PROG_LOAD_attr4, print_BPF_PROG_LOAD_attr4): New functions.
(BPF_PROG_LOAD_checks): Check new decoding features.
These were introduced by Linux commit v4.15-rc1~84^2~384^2~4.
* bpf_attr.h (struct BPF_OBJ_PIN_struct): Add file_flags field.
(struct BPF_PROG_GET_NEXT_ID_struct, struct BPF_PROG_GET_FD_BY_ID_struct,
struct BPF_MAP_GET_FD_BY_ID_struct): Add open_flags field.
(BPF_OBJ_PIN_struct_size, expected_BPF_OBJ_PIN_struct_size,
expected_BPF_PROG_GET_NEXT_ID_struct_size,
expected_BPF_PROG_GET_FD_BY_ID_struct_size,
expected_BPF_MAP_GET_FD_BY_ID_struct_size): Update.
* bpf.c (DEF_BPF_CMD_DECODER(BPF_OBJ_PIN)): Check the length, skip
printing the rest of attributes if it is less than offset of the
end of the bpf_fd field, print file_flags field otherwise.
(DEF_BPF_CMD_DECODER(BPF_PROG_GET_NEXT_ID),
DEF_BPF_CMD_DECODER(BPF_PROG_GET_FD_BY_ID),
DEF_BPF_CMD_DECODER(BPF_MAP_GET_FD_BY_ID)): Check the length, skip
printing the rest of attributes if it is less than offset of the
end of the next_id field, print open_flags field otherwise.
* xlat/bpf_file_mode_flags.in: New file.
* tests/bpf.c (BPF_OBJ_PIN_checks, BPF_PROG_GET_NEXT_ID_checks,
BPF_PROG_GET_FD_BY_ID_checks, BPF_MAP_GET_FD_BY_ID_checks): Check it.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
This also unifies decoders of bpf commands by moving common code
to new macros.
* bpf_attr.h: New file.
* Makefile.am (strace_SOURCES): Add it.
* bpf.c: Include it.
(DEF_BPF_CMD_DECODER): Rename to BEGIN_BPF_CMD_DECODER, add code common
to all decoders. All users updated.
(END_BPF_CMD_DECODER): New macro, add its invocation to all users
of BEGIN_BPF_CMD_DECODER macro.
