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| -rw-r--r-- | Documentation/bpf/btf.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/bpf/btf.rst b/Documentation/bpf/btf.rst index 29396e6943b0..8820360d00da 100644 --- a/Documentation/bpf/btf.rst +++ b/Documentation/bpf/btf.rst | |||
| @@ -578,6 +578,7 @@ For line_info, the line number and column number are defined as below: | |||
| 578 | #define BPF_LINE_INFO_LINE_COL(line_col) ((line_col) & 0x3ff) | 578 | #define BPF_LINE_INFO_LINE_COL(line_col) ((line_col) & 0x3ff) |
| 579 | 579 | ||
| 580 | 3.4 BPF_{PROG,MAP}_GET_NEXT_ID | 580 | 3.4 BPF_{PROG,MAP}_GET_NEXT_ID |
| 581 | ============================== | ||
| 581 | 582 | ||
| 582 | In kernel, every loaded program, map or btf has a unique id. The id won't | 583 | In kernel, every loaded program, map or btf has a unique id. The id won't |
| 583 | change during the lifetime of a program, map, or btf. | 584 | change during the lifetime of a program, map, or btf. |
| @@ -587,6 +588,7 @@ each command, to user space, for bpf program or maps, respectively, so an | |||
| 587 | inspection tool can inspect all programs and maps. | 588 | inspection tool can inspect all programs and maps. |
| 588 | 589 | ||
| 589 | 3.5 BPF_{PROG,MAP}_GET_FD_BY_ID | 590 | 3.5 BPF_{PROG,MAP}_GET_FD_BY_ID |
| 591 | =============================== | ||
| 590 | 592 | ||
| 591 | An introspection tool cannot use id to get details about program or maps. | 593 | An introspection tool cannot use id to get details about program or maps. |
| 592 | A file descriptor needs to be obtained first for reference-counting purpose. | 594 | A file descriptor needs to be obtained first for reference-counting purpose. |
