[PATCH v2 4/6] efi_loader: support boot from URI device path
Masahisa Kojima
masahisa.kojima at linaro.org
Fri Sep 15 06:17:31 CEST 2023
Hi Heinrich,
On Thu, 14 Sept 2023 at 23:55, Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> On 01.09.23 12:25, Masahisa Kojima wrote:
> > This supports to boot from the URI device path.
> > When user selects the URI device path, bootmgr downloads
> > the file using wget into the address specified by loadaddr
> > env variable.
> > If the file is .iso or .img file, mount the image with blkmap
> > then try to boot with the default file(e.g. EFI/BOOT/BOOTAA64.EFI).
> > If the file is .efi file, load and start the downloaded file.
> >
> > Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
> > ---
> > lib/efi_loader/efi_bootmgr.c | 197 +++++++++++++++++++++++++++++++++++
> > 1 file changed, 197 insertions(+)
> >
> > diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
> > index a40762c74c..0e8d2ca9d1 100644
> > --- a/lib/efi_loader/efi_bootmgr.c
> > +++ b/lib/efi_loader/efi_bootmgr.c
> > @@ -7,10 +7,14 @@
> >
> > #define LOG_CATEGORY LOGC_EFI
> >
> > +#include <blk.h>
> > +#include <blkmap.h>
> > #include <common.h>
> > #include <charset.h>
> > +#include <dm.h>
> > #include <log.h>
> > #include <malloc.h>
> > +#include <net.h>
> > #include <efi_default_filename.h>
> > #include <efi_loader.h>
> > #include <efi_variable.h>
> > @@ -168,6 +172,193 @@ out:
> > return ret;
> > }
> >
> > +#if (IS_ENABLED(CONFIG_BLKMAP) && IS_ENABLED(CONFIG_CMD_WGET) && IS_ENABLED(CONFIG_CMD_DNS))
> > +/**
> > + * mount_image() - mount the image with blkmap
> > + *
> > + * @lo_label u16 label string of load option
> > + * @image_addr: image address
> > + * @image_size image size
> > + * Return: pointer to the UCLASS_BLK udevice, NULL if failed
> > + */
> > +static struct udevice *mount_image(u16 *lo_label, ulong image_addr, int image_size)
> > +{
> > + int err;
> > + struct blkmap *bm;
> > + struct udevice *bm_dev;
> > + char *label = NULL, *p;
> > +
> > + label = efi_alloc(utf16_utf8_strlen(lo_label) + 1);
> > + if (!label)
> > + return NULL;
> > +
> > + p = label;
> > + utf16_utf8_strcpy(&p, lo_label);
> > + err = blkmap_create_ramdisk(label, image_addr, image_size, &bm_dev);
> > + if (err) {
> > + efi_free_pool(label);
> > + return NULL;
> > + }
> > + bm = dev_get_plat(bm_dev);
> > +
> > + efi_free_pool(label);
> > +
> > + return bm->blk;
> > +}
> > +
> > +/**
> > + * try_load_default_file() - try to load the default file
> > + *
> > + * Search the device having EFI_SIMPLE_FILE_SYSTEM_PROTOCOL,
> > + * then try to load with the default boot file(e.g. EFI/BOOT/BOOTAA64.EFI).
> > + *
> > + * @dev pointer to the UCLASS_BLK or UCLASS_PARTITION udevice
> > + * @image_handle: pointer to handle for newly installed image
> > + * Return: status code
> > + */
> > +static efi_status_t try_load_default_file(struct udevice *dev,
> > + efi_handle_t *image_handle)
> > +{
> > + efi_status_t ret;
> > + efi_handle_t bm_handle;
> > + struct efi_handler *handler;
> > + struct efi_device_path *file_path;
> > + struct efi_device_path *device_path;
> > +
> > + if (dev_tag_get_ptr(dev, DM_TAG_EFI, (void **)&bm_handle)) {
> > + log_warning("DM_TAG_EFI not found\n");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > +
> > + ret = efi_search_protocol(bm_handle,
> > + &efi_simple_file_system_protocol_guid, &handler);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = efi_search_protocol(bm_handle, &efi_guid_device_path, &handler);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = efi_protocol_open(handler, (void **)&device_path, efi_root, NULL,
> > + EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + file_path = expand_media_path(device_path);
> > + ret = EFI_CALL(efi_load_image(true, efi_root, file_path, NULL, 0,
> > + image_handle));
> > +
> > + efi_free_pool(file_path);
> > +
> > + return ret;
> > +}
> > +
> > +/**
> > + * load_default_file_from_blk_dev() - load the default file
> > + *
> > + * @blk pointer to the UCLASS_BLK udevice
> > + * @handle: pointer to handle for newly installed image
> > + * Return: status code
> > + */
> > +static efi_status_t load_default_file_from_blk_dev(struct udevice *blk,
> > + efi_handle_t *handle)
> > +{
> > + efi_status_t ret;
> > + struct udevice *partition;
> > +
> > + /* image that has no partition table but a file system */
> > + ret = try_load_default_file(blk, handle);
> > + if (ret == EFI_SUCCESS)
> > + return ret;
> > +
> > + /* try the partitions */
> > + device_foreach_child(partition, blk) {
> > + enum uclass_id id;
> > +
> > + id = device_get_uclass_id(partition);
> > + if (id != UCLASS_PARTITION)
> > + continue;
> > +
> > + ret = try_load_default_file(partition, handle);
> > + if (ret == EFI_SUCCESS)
> > + return ret;
> > + }
> > +
> > + return EFI_NOT_FOUND;
> > +}
> > +
> > +/**
> > + * try_load_from_uri_path() - Handle the URI device path
> > + *
> > + * @uridp: uri device path
> > + * @lo_label label of load option
> > + * @handle: pointer to handle for newly installed image
> > + * Return: status code
> > + */
> > +static efi_status_t try_load_from_uri_path(struct efi_device_path_uri *uridp,
> > + u16 *lo_label,
> > + efi_handle_t *handle)
> > +{
> > + char *s;
> > + int uri_len;
> > + int image_size;
> > + efi_status_t ret;
> > + ulong image_addr;
> > +
> > + s = env_get("loadaddr");
> > + if (!s) {
> > + log_err("Error: loadaddr is not set\n");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > + image_addr = hextoul(s, NULL);
> > + image_size = wget_with_dns(image_addr, uridp->uri);
> > + if (image_size < 0)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + /*
> > + * If the file extension is ".iso" or ".img", mount it and try to load
> > + * the default file.
> > + * If the file is ".efi" and PE-COFF image, load the downloaded file.
> > + */
>
> There is no requirement that EFI binaries have an .efi extension.
> Does EDK II require it?
No, sorry.
".efi" extension check should be removed.
Thanks,
Masahisa Kojima
>
> Best regards
>
> Heinrich
>
>
> > + uri_len = strlen(uridp->uri); /* todo: directly use uridp->uri */
> > + if (!strncmp(&uridp->uri[uri_len - 4], ".iso", 4) ||
> > + !strncmp(&uridp->uri[uri_len - 4], ".img", 4)) {
> > + struct udevice *blk;
> > +
> > + blk = mount_image(lo_label, image_addr, image_size);
> > + if (!blk)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + ret = load_default_file_from_blk_dev(blk, handle);
> > + } else if (!strncmp(&uridp->uri[uri_len - 4], ".efi", 4)) {
> > + efi_handle_t mem_handle = NULL;
> > + struct efi_device_path *file_path = NULL;
> > +
> > + ret = efi_check_pe((void *)image_addr, image_size, NULL);
> > + if (ret != EFI_SUCCESS) {
> > + log_err("Error: downloaded image is not a PE-COFF image\n");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > +
> > + file_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE,
> > + (uintptr_t)image_addr, image_size);
> > + ret = efi_install_multiple_protocol_interfaces(
> > + &mem_handle, &efi_guid_device_path, file_path, NULL);
> > + if (ret != EFI_SUCCESS)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + ret = EFI_CALL(efi_load_image(false, efi_root, file_path,
> > + (void *)image_addr, image_size,
> > + handle));
> > + } else {
> > + log_err("Error: file type is not supported\n");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > +
> > + return ret;
> > +}
> > +#endif
> > +
> > /**
> > * try_load_entry() - try to load image for boot option
> > *
> > @@ -211,6 +402,12 @@ static efi_status_t try_load_entry(u16 n, efi_handle_t *handle,
> > if (EFI_DP_TYPE(lo.file_path, MEDIA_DEVICE, FILE_PATH)) {
> > /* file_path doesn't contain a device path */
> > ret = try_load_from_short_path(lo.file_path, handle);
> > +#if (IS_ENABLED(CONFIG_BLKMAP) && IS_ENABLED(CONFIG_CMD_WGET) && IS_ENABLED(CONFIG_CMD_DNS))
> > + } else if (EFI_DP_TYPE(lo.file_path, MESSAGING_DEVICE, MSG_URI)) {
> > + ret = try_load_from_uri_path(
> > + (struct efi_device_path_uri *)lo.file_path,
> > + lo.label, handle);
> > +#endif
> > } else {
> > file_path = expand_media_path(lo.file_path);
> > ret = EFI_CALL(efi_load_image(true, efi_root, file_path,
>
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