Hi,
On Thu, 3 Aug 2023 at 10:42, Pingfan Liu <piliu@xxxxxxxxxx> wrote:
>
> Utilize the image load interface to export the kernel fd, which points
> to the uncompressed kernel and will be passed to kexec_file_load.
>
> The credit goes to the Dave Young, who contributes the original code.
>
> Signed-off-by: Pingfan Liu <piliu@xxxxxxxxxx>
> Co-authored-by: Dave Young <dyoung@xxxxxxxxxx>
Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
> To: kexec@xxxxxxxxxxxxxxxxxxx
> Cc: horms@xxxxxxxxxxxx
> Cc: ardb@xxxxxxxxxx
> Cc: jeremy.linton@xxxxxxx
> ---
> kexec/kexec.c | 8 ++++++++
> kexec/kexec.h | 1 +
> 2 files changed, 9 insertions(+)
>
> diff --git a/kexec/kexec.c b/kexec/kexec.c
> index d132eb5..c3b182e 100644
> --- a/kexec/kexec.c
> +++ b/kexec/kexec.c
> @@ -1292,6 +1292,7 @@ static int do_kexec_file_load(int fileind, int argc, char **argv,
> info.kexec_flags = flags;
>
> info.file_mode = 1;
> + info.kernel_fd = -1;
> info.initrd_fd = -1;
>
> if (!is_kexec_file_load_implemented())
> @@ -1337,6 +1338,13 @@ static int do_kexec_file_load(int fileind, int argc, char **argv,
> return ret;
> }
>
> + /*
> + * image type specific load functioin detect the capsule kernel type
> + * and create another fd for file load. For example the zboot kernel.
> + */
> + if (info.kernel_fd != -1)
> + kernel_fd = info.kernel_fd;
> +
> /*
> * If there is no initramfs, set KEXEC_FILE_NO_INITRAMFS flag so that
> * kernel does not return error with negative initrd_fd.
> diff --git a/kexec/kexec.h b/kexec/kexec.h
> index 0d820ad..ed3b499 100644
> --- a/kexec/kexec.h
> +++ b/kexec/kexec.h
> @@ -164,6 +164,7 @@ struct kexec_info {
> unsigned long file_mode :1;
>
> /* Filled by kernel image processing code */
> + int kernel_fd;
> int initrd_fd;
> char *command_line;
> int command_line_len;
> --
> 2.31.1
>
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