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[efi] Support the EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE operation

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Support getting the size of a TFTP file via the EFI PXE API, as
required for booting OpenBSD.

Debugged-by: Eric Radman <ericshane@eradman.com>
Tested-by: Eric Radman <ericshane@eradman.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2026-02-25 00:25:03 +00:00
parent b48965ae57
commit 596c84ce77
1 changed files with 24 additions and 6 deletions
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30
src/interface/efi/efi_pxe.c
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@ -96,6 +96,8 @@ struct efi_pxe {
/** (M)TFTP download interface */
struct interface tftp;
/** Opcode */
unsigned int opcode;
/** Block size (for TFTP) */
size_t blksize;
/** Overall return status */
@ -354,11 +356,17 @@ static int efi_pxe_tftp_deliver ( struct efi_pxe *pxe,
/* Deliver to data transfer buffer */
if ( ( rc = xferbuf_deliver ( &pxe->buf, iob_disown ( iobuf ),
meta ) ) != 0 )
goto err_deliver;
goto done;
/* Stop when filesize is known, if applicable */
if ( ( pxe->opcode == EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE ) &&
( meta->flags & XFER_FL_ABS_OFFSET ) ) {
goto done;
}
return 0;
err_deliver:
done:
efi_pxe_tftp_close ( pxe, rc );
return rc;
}
@ -908,7 +916,8 @@ efi_pxe_mtftp ( EFI_PXE_BASE_CODE_PROTOCOL *base,
/* Fail unless operation is supported */
if ( ! ( ( opcode == EFI_PXE_BASE_CODE_TFTP_READ_FILE ) ||
( opcode == EFI_PXE_BASE_CODE_MTFTP_READ_FILE ) ) ) {
( opcode == EFI_PXE_BASE_CODE_MTFTP_READ_FILE ) ||
( opcode == EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE ) ) ) {
DBGC ( pxe, "PXE %s unsupported MTFTP opcode %d\n",
pxe->name, opcode );
rc = -ENOTSUP;
@ -925,7 +934,12 @@ efi_pxe_mtftp ( EFI_PXE_BASE_CODE_PROTOCOL *base,
pxe->blksize = ( ( callback && blksize ) ? *blksize : -1UL );
/* Initialise data transfer buffer */
xferbuf_fixed_init ( &pxe->buf, data, *len );
memset ( &pxe->buf, 0, sizeof ( pxe->buf ) );
if ( opcode == EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE ) {
xferbuf_void_init ( &pxe->buf );
} else {
xferbuf_fixed_init ( &pxe->buf, data, *len );
}
/* Open download */
if ( ( rc = efi_pxe_tftp_open ( pxe, ip,
@ -933,14 +947,18 @@ efi_pxe_mtftp ( EFI_PXE_BASE_CODE_PROTOCOL *base,
goto err_open;
/* Wait for download to complete */
pxe->opcode = opcode;
pxe->rc = -EINPROGRESS;
while ( pxe->rc == -EINPROGRESS )
step();
*len = pxe->buf.max;
if ( ( rc = pxe->rc ) != 0 ) {
DBGC ( pxe, "PXE %s download failed: %s\n",
pxe->name, strerror ( rc ) );
DBGC ( pxe, "PXE %s MTFTP %d failed: %s\n",
pxe->name, opcode, strerror ( rc ) );
goto err_download;
}
DBGC ( pxe, "PXE %s MTFTP %d %p+%llx complete\n",
pxe->name, opcode, data, *len );
err_download:
efi_pxe_tftp_close ( pxe, rc );