Re: [PATCH RFC v2 4/6] coredump: show supported coredump modes

[Jann Horn]

On Fri, May 2, 2025 at 2:43 PM Christian Brauner <brauner@xxxxxxxxxx> wrote:
> Allow userspace to discover what coredump modes are supported.
>
> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
> ---
>  fs/coredump.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/fs/coredump.c b/fs/coredump.c
> index 9a6cba233db9..1c7428c23878 100644
> --- a/fs/coredump.c
> +++ b/fs/coredump.c
> @@ -1217,6 +1217,13 @@ static int proc_dostring_coredump(const struct ctl_table *table, int write,
>
>  static const unsigned int core_file_note_size_min = CORE_FILE_NOTE_SIZE_DEFAULT;
>  static const unsigned int core_file_note_size_max = CORE_FILE_NOTE_SIZE_MAX;
> +static char core_modes[] = {
> +#ifdef CONFIG_UNIX
> +       "file\npipe\nunix"
> +#else
> +       "file\npipe"
> +#endif
> +};

Nit: You could do something like

static char core_modes[] =
#ifdef CONFIG_UNIX
  "unix\n"
#endif
  "file\npipe"
;