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bpf: Extract bpf_get_linfo_file_line

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Extract bpf_get_linfo_file_line as its own function so that the logic to
obtain the file, line, and line number for a given program can be shared
in subsequent patches.

Reviewed-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260408021359.3786905-3-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Kumar Kartikeya Dwivedi
2026-04-08 04:13:53 +02:00
committed by Alexei Starovoitov
parent 5c662b1c17
commit fbb98834a9
2 changed files with 23 additions and 8 deletions
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29
kernel/bpf/core.c
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@@ -3315,6 +3315,26 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(xdp_bulk_tx);
#ifdef CONFIG_BPF_SYSCALL
void bpf_get_linfo_file_line(struct btf *btf, const struct bpf_line_info *linfo,
const char **filep, const char **linep, int *nump)
{
/* Get base component of the file path. */
if (filep) {
*filep = btf_name_by_offset(btf, linfo->file_name_off);
*filep = kbasename(*filep);
}
/* Obtain the source line, and strip whitespace in prefix. */
if (linep) {
*linep = btf_name_by_offset(btf, linfo->line_off);
while (isspace(**linep))
*linep += 1;
}
if (nump)
*nump = BPF_LINE_INFO_LINE_NUM(linfo->line_col);
}
int bpf_prog_get_file_line(struct bpf_prog *prog, unsigned long ip, const char **filep,
const char **linep, int *nump)
{
@@ -3349,14 +3369,7 @@ int bpf_prog_get_file_line(struct bpf_prog *prog, unsigned long ip, const char *
if (idx == -1)
return -ENOENT;
/* Get base component of the file path. */
*filep = btf_name_by_offset(btf, linfo[idx].file_name_off);
*filep = kbasename(*filep);
/* Obtain the source line, and strip whitespace in prefix. */
*linep = btf_name_by_offset(btf, linfo[idx].line_off);
while (isspace(**linep))
*linep += 1;
*nump = BPF_LINE_INFO_LINE_NUM(linfo[idx].line_col);
bpf_get_linfo_file_line(btf, &linfo[idx], filep, linep, nump);
return 0;
}