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@ -0,0 +1,573 @@
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/*
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* Copyright (C) 2016 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <string.h>
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#include <strings.h>
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#include <stdio.h>
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#include <errno.h>
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#include <assert.h>
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#include <ipxe/refcnt.h>
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#include <ipxe/malloc.h>
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#include <ipxe/xfer.h>
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#include <ipxe/open.h>
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#include <ipxe/uri.h>
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#include <ipxe/iobuf.h>
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#include <ipxe/process.h>
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#include <ipxe/efi/efi.h>
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#include <ipxe/efi/efi_strings.h>
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#include <ipxe/efi/efi_utils.h>
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#include <ipxe/efi/Protocol/SimpleFileSystem.h>
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#include <ipxe/efi/Guid/FileInfo.h>
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#include <ipxe/efi/Guid/FileSystemInfo.h>
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/** @file
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*
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* EFI local file access
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*
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*/
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/** Download blocksize */
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#define EFI_LOCAL_BLKSIZE 4096
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/** An EFI local file */
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struct efi_local {
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/** Reference count */
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struct refcnt refcnt;
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/** Data transfer interface */
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struct interface xfer;
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/** Download process */
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struct process process;
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/** EFI root directory */
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EFI_FILE_PROTOCOL *root;
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/** EFI file */
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EFI_FILE_PROTOCOL *file;
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/** Length of file */
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size_t len;
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};
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/**
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* Close local file
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*
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* @v local Local file
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* @v rc Reason for close
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*/
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static void efi_local_close ( struct efi_local *local, int rc ) {
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/* Stop process */
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process_del ( &local->process );
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/* Shut down data transfer interface */
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intf_shutdown ( &local->xfer, rc );
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/* Close EFI file */
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if ( local->file ) {
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local->file->Close ( local->file );
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local->file = NULL;
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}
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/* Close EFI root directory */
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if ( local->root ) {
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local->root->Close ( local->root );
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local->root = NULL;
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}
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}
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/**
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* Local file process
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*
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* @v local Local file
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*/
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static void efi_local_step ( struct efi_local *local ) {
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EFI_FILE_PROTOCOL *file = local->file;
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struct io_buffer *iobuf = NULL;
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size_t remaining;
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size_t frag_len;
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UINTN size;
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EFI_STATUS efirc;
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int rc;
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/* Wait until data transfer interface is ready */
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if ( ! xfer_window ( &local->xfer ) )
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return;
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/* Presize receive buffer */
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remaining = local->len;
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xfer_seek ( &local->xfer, remaining );
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xfer_seek ( &local->xfer, 0 );
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/* Get file contents */
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while ( remaining ) {
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/* Calculate length for this fragment */
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frag_len = remaining;
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if ( frag_len > EFI_LOCAL_BLKSIZE )
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frag_len = EFI_LOCAL_BLKSIZE;
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/* Allocate I/O buffer */
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iobuf = xfer_alloc_iob ( &local->xfer, frag_len );
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if ( ! iobuf ) {
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rc = -ENOMEM;
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goto err;
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}
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/* Read block */
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size = frag_len;
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if ( ( efirc = file->Read ( file, &size, iobuf->data ) ) != 0 ){
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rc = -EEFI ( efirc );
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DBGC ( local, "LOCAL %p could not read from file: %s\n",
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local, strerror ( rc ) );
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goto err;
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}
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assert ( size <= frag_len );
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iob_put ( iobuf, size );
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/* Deliver data */
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if ( ( rc = xfer_deliver_iob ( &local->xfer,
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iob_disown ( iobuf ) ) ) != 0 ) {
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DBGC ( local, "LOCAL %p could not deliver data: %s\n",
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local, strerror ( rc ) );
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goto err;
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}
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/* Move to next block */
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remaining -= frag_len;
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}
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/* Close download */
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efi_local_close ( local, 0 );
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return;
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err:
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free_iob ( iobuf );
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efi_local_close ( local, rc );
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}
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/** Data transfer interface operations */
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static struct interface_operation efi_local_operations[] = {
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INTF_OP ( xfer_window_changed, struct efi_local *, efi_local_step ),
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INTF_OP ( intf_close, struct efi_local *, efi_local_close ),
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};
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/** Data transfer interface descriptor */
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static struct interface_descriptor efi_local_xfer_desc =
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INTF_DESC ( struct efi_local, xfer, efi_local_operations );
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/** Process descriptor */
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static struct process_descriptor efi_local_process_desc =
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PROC_DESC_ONCE ( struct efi_local, process, efi_local_step );
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/**
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* Check for matching volume name
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*
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* @v local Local file
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* @v device Device handle
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* @v root Root filesystem handle
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* @v volume Volume name
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* @ret rc Return status code
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*/
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static int efi_local_check_volume_name ( struct efi_local *local,
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EFI_HANDLE device,
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EFI_FILE_PROTOCOL *root,
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const char *volume ) {
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EFI_FILE_SYSTEM_INFO *info;
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UINTN size;
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char *label;
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EFI_STATUS efirc;
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int rc;
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/* Get length of file system information */
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size = 0;
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root->GetInfo ( root, &efi_file_system_info_id, &size, NULL );
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/* Allocate file system information */
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info = malloc ( size );
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if ( ! info ) {
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rc = -ENOMEM;
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goto err_alloc_info;
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}
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/* Get file system information */
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if ( ( efirc = root->GetInfo ( root, &efi_file_system_info_id, &size,
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info ) ) != 0 ) {
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rc = -EEFI ( efirc );
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DBGC ( local, "LOCAL %p could not get file system info on %s: "
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"%s\n", local, efi_handle_name ( device ),
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strerror ( rc ) );
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goto err_get_info;
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}
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DBGC2 ( local, "LOCAL %p found %s with label \"%ls\"\n",
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local, efi_handle_name ( device ), info->VolumeLabel );
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/* Construct volume label for comparison */
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if ( asprintf ( &label, "%ls", info->VolumeLabel ) < 0 ) {
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rc = -ENOMEM;
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goto err_alloc_label;
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}
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/* Compare volume label */
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if ( strcasecmp ( volume, label ) != 0 ) {
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rc = -ENOENT;
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goto err_compare;
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}
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/* Success */
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rc = 0;
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err_compare:
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free ( label );
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err_alloc_label:
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err_get_info:
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free ( info );
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err_alloc_info:
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return rc;
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}
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/**
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* Open root filesystem
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*
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* @v local Local file
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* @v device Device handle
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* @v root Root filesystem handle to fill in
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* @ret rc Return status code
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*/
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static int efi_local_open_root ( struct efi_local *local, EFI_HANDLE device,
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EFI_FILE_PROTOCOL **root ) {
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EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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union {
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void *interface;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *fs;
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} u;
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EFI_STATUS efirc;
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int rc;
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/* Open file system protocol */
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if ( ( efirc = bs->OpenProtocol ( device,
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&efi_simple_file_system_protocol_guid,
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&u.interface, efi_image_handle,
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device,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
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rc = -EEFI ( efirc );
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DBGC ( local, "LOCAL %p could not open filesystem on %s: %s\n",
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local, efi_handle_name ( device ), strerror ( rc ) );
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goto err_filesystem;
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}
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/* Open root directory */
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if ( ( efirc = u.fs->OpenVolume ( u.fs, root ) ) != 0 ) {
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rc = -EEFI ( efirc );
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DBGC ( local, "LOCAL %p could not open volume on %s: %s\n",
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local, efi_handle_name ( device ), strerror ( rc ) );
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goto err_volume;
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}
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/* Success */
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rc = 0;
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err_volume:
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bs->CloseProtocol ( device, &efi_simple_file_system_protocol_guid,
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efi_image_handle, device );
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err_filesystem:
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return rc;
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}
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/**
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* Open root filesystem of specified volume
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*
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* @v local Local file
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* @v volume Volume name, or NULL to use loaded image's device
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* @ret rc Return status code
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*/
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static int efi_local_open_volume ( struct efi_local *local,
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const char *volume ) {
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EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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EFI_GUID *protocol = &efi_simple_file_system_protocol_guid;
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int ( * check ) ( struct efi_local *local, EFI_HANDLE device,
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EFI_FILE_PROTOCOL *root, const char *volume );
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EFI_FILE_PROTOCOL *root;
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EFI_HANDLE *handles;
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EFI_HANDLE device;
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UINTN num_handles;
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UINTN i;
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EFI_STATUS efirc;
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int rc;
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/* Identify candidate handles */
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if ( volume ) {
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/* Locate all filesystem handles */
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if ( ( efirc = bs->LocateHandleBuffer ( ByProtocol, protocol,
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NULL, &num_handles,
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&handles ) ) != 0 ) {
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rc = -EEFI ( efirc );
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DBGC ( local, "LOCAL %p could not enumerate handles: "
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"%s\n", local, strerror ( rc ) );
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return rc;
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}
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check = efi_local_check_volume_name;
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} else {
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/* Use our loaded image's device handle */
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handles = &efi_loaded_image->DeviceHandle;
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num_handles = 1;
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check = NULL;
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}
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/* Find matching handle */
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for ( i = 0 ; i < num_handles ; i++ ) {
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|
|
/* Get this device handle */
|
|
|
|
|
device = handles[i];
|
|
|
|
|
|
|
|
|
|
/* Open root directory */
|
|
|
|
|
if ( ( rc = efi_local_open_root ( local, device, &root ) ) != 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* Check volume name, if applicable */
|
|
|
|
|
if ( ( check == NULL ) ||
|
|
|
|
|
( ( rc = check ( local, device, root, volume ) ) == 0 ) ) {
|
|
|
|
|
DBGC ( local, "LOCAL %p using %s",
|
|
|
|
|
local, efi_handle_name ( device ) );
|
|
|
|
|
if ( volume )
|
|
|
|
|
DBGC ( local, " with label \"%s\"", volume );
|
|
|
|
|
DBGC ( local, "\n" );
|
|
|
|
|
local->root = root;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Close root directory */
|
|
|
|
|
root->Close ( root );
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Free handles, if applicable */
|
|
|
|
|
if ( volume )
|
|
|
|
|
bs->FreePool ( handles );
|
|
|
|
|
|
|
|
|
|
/* Fail if we found no matching handle */
|
|
|
|
|
if ( ! local->root ) {
|
|
|
|
|
DBGC ( local, "LOCAL %p found no matching handle\n", local );
|
|
|
|
|
return -ENOENT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Open fully-resolved path
|
|
|
|
|
*
|
|
|
|
|
* @v local Local file
|
|
|
|
|
* @v resolved Resolved path
|
|
|
|
|
* @ret rc Return status code
|
|
|
|
|
*/
|
|
|
|
|
static int efi_local_open_resolved ( struct efi_local *local,
|
|
|
|
|
const char *resolved ) {
|
|
|
|
|
size_t name_len = strlen ( resolved );
|
|
|
|
|
CHAR16 name[ name_len + 1 /* wNUL */ ];
|
|
|
|
|
EFI_FILE_PROTOCOL *file;
|
|
|
|
|
EFI_STATUS efirc;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
/* Construct filename */
|
|
|
|
|
efi_snprintf ( name, ( name_len + 1 /* wNUL */ ), "%s", resolved );
|
|
|
|
|
|
|
|
|
|
/* Open file */
|
|
|
|
|
if ( ( efirc = local->root->Open ( local->root, &file, name,
|
|
|
|
|
EFI_FILE_MODE_READ, 0 ) ) != 0 ) {
|
|
|
|
|
rc = -EEFI ( efirc );
|
|
|
|
|
DBGC ( local, "LOCAL %p could not open \"%s\": %s\n",
|
|
|
|
|
local, resolved, strerror ( rc ) );
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
local->file = file;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Open specified path
|
|
|
|
|
*
|
|
|
|
|
* @v local Local file
|
|
|
|
|
* @v path Path to file
|
|
|
|
|
* @ret rc Return status code
|
|
|
|
|
*/
|
|
|
|
|
static int efi_local_open_path ( struct efi_local *local, const char *path ) {
|
|
|
|
|
FILEPATH_DEVICE_PATH *fp = container_of ( efi_loaded_image->FilePath,
|
|
|
|
|
FILEPATH_DEVICE_PATH, Header);
|
|
|
|
|
size_t fp_len = ( fp ? efi_devpath_len ( &fp->Header ) : 0 );
|
|
|
|
|
char base[ fp_len / 2 /* Cannot exceed this length */ ];
|
|
|
|
|
size_t remaining = sizeof ( base );
|
|
|
|
|
size_t len;
|
|
|
|
|
char *resolved;
|
|
|
|
|
char *tmp;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
/* Construct base path to our own image, if possible */
|
|
|
|
|
memset ( base, 0, sizeof ( base ) );
|
|
|
|
|
tmp = base;
|
|
|
|
|
while ( fp && ( fp->Header.Type != END_DEVICE_PATH_TYPE ) ) {
|
|
|
|
|
len = snprintf ( tmp, remaining, "%ls", fp->PathName );
|
|
|
|
|
assert ( len < remaining );
|
|
|
|
|
tmp += len;
|
|
|
|
|
remaining -= len;
|
|
|
|
|
fp = ( ( ( void * ) fp ) + ( ( fp->Header.Length[1] << 8 ) |
|
|
|
|
|
fp->Header.Length[0] ) );
|
|
|
|
|
}
|
|
|
|
|
DBGC2 ( local, "LOCAL %p base path \"%s\"\n",
|
|
|
|
|
local, base );
|
|
|
|
|
|
|
|
|
|
/* Convert to sane path separators */
|
|
|
|
|
for ( tmp = base ; *tmp ; tmp++ ) {
|
|
|
|
|
if ( *tmp == '\\' )
|
|
|
|
|
*tmp = '/';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Resolve path */
|
|
|
|
|
resolved = resolve_path ( base, path );
|
|
|
|
|
if ( ! resolved ) {
|
|
|
|
|
rc = -ENOMEM;
|
|
|
|
|
goto err_resolve;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Convert to insane path separators */
|
|
|
|
|
for ( tmp = resolved ; *tmp ; tmp++ ) {
|
|
|
|
|
if ( *tmp == '/' )
|
|
|
|
|
*tmp = '\\';
|
|
|
|
|
}
|
|
|
|
|
DBGC ( local, "LOCAL %p using \"%s\"\n",
|
|
|
|
|
local, resolved );
|
|
|
|
|
|
|
|
|
|
/* Open resolved path */
|
|
|
|
|
if ( ( rc = efi_local_open_resolved ( local, resolved ) ) != 0 )
|
|
|
|
|
goto err_open;
|
|
|
|
|
|
|
|
|
|
err_open:
|
|
|
|
|
free ( resolved );
|
|
|
|
|
err_resolve:
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Get file length
|
|
|
|
|
*
|
|
|
|
|
* @v local Local file
|
|
|
|
|
* @ret rc Return status code
|
|
|
|
|
*/
|
|
|
|
|
static int efi_local_len ( struct efi_local *local ) {
|
|
|
|
|
EFI_FILE_PROTOCOL *file = local->file;
|
|
|
|
|
EFI_FILE_INFO *info;
|
|
|
|
|
EFI_STATUS efirc;
|
|
|
|
|
UINTN size;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
/* Get size of file information */
|
|
|
|
|
size = 0;
|
|
|
|
|
file->GetInfo ( file, &efi_file_info_id, &size, NULL );
|
|
|
|
|
|
|
|
|
|
/* Allocate file information */
|
|
|
|
|
info = malloc ( size );
|
|
|
|
|
if ( ! info ) {
|
|
|
|
|
rc = -ENOMEM;
|
|
|
|
|
goto err_alloc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Get file information */
|
|
|
|
|
if ( ( efirc = file->GetInfo ( file, &efi_file_info_id, &size,
|
|
|
|
|
info ) ) != 0 ) {
|
|
|
|
|
rc = -EEFI ( efirc );
|
|
|
|
|
DBGC ( local, "LOCAL %p could not get file info: %s\n",
|
|
|
|
|
local, strerror ( rc ) );
|
|
|
|
|
goto err_info;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Record file length */
|
|
|
|
|
local->len = info->FileSize;
|
|
|
|
|
|
|
|
|
|
/* Success */
|
|
|
|
|
rc = 0;
|
|
|
|
|
|
|
|
|
|
err_info:
|
|
|
|
|
free ( info );
|
|
|
|
|
err_alloc:
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Open local file
|
|
|
|
|
*
|
|
|
|
|
* @v xfer Data transfer interface
|
|
|
|
|
* @v uri Request URI
|
|
|
|
|
* @ret rc Return status code
|
|
|
|
|
*/
|
|
|
|
|
static int efi_local_open ( struct interface *xfer, struct uri *uri ) {
|
|
|
|
|
struct efi_local *local;
|
|
|
|
|
const char *volume;
|
|
|
|
|
const char *path;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
/* Parse URI */
|
|
|
|
|
volume = ( ( uri->host && uri->host[0] ) ? uri->host : NULL );
|
|
|
|
|
path = ( uri->opaque ? uri->opaque : uri->path );
|
|
|
|
|
|
|
|
|
|
/* Allocate and initialise structure */
|
|
|
|
|
local = zalloc ( sizeof ( *local ) );
|
|
|
|
|
if ( ! local ) {
|
|
|
|
|
rc = -ENOMEM;
|
|
|
|
|
goto err_alloc;
|
|
|
|
|
}
|
|
|
|
|
ref_init ( &local->refcnt, NULL );
|
|
|
|
|
intf_init ( &local->xfer, &efi_local_xfer_desc, &local->refcnt );
|
|
|
|
|
process_init ( &local->process, &efi_local_process_desc,
|
|
|
|
|
&local->refcnt );
|
|
|
|
|
|
|
|
|
|
/* Open specified volume */
|
|
|
|
|
if ( ( rc = efi_local_open_volume ( local, volume ) ) != 0 )
|
|
|
|
|
goto err_open_root;
|
|
|
|
|
|
|
|
|
|
/* Open specified path */
|
|
|
|
|
if ( ( rc = efi_local_open_path ( local, path ) ) != 0 )
|
|
|
|
|
goto err_open_file;
|
|
|
|
|
|
|
|
|
|
/* Get length of file */
|
|
|
|
|
if ( ( rc = efi_local_len ( local ) ) != 0 )
|
|
|
|
|
goto err_len;
|
|
|
|
|
|
|
|
|
|
/* Attach to parent interface, mortalise self, and return */
|
|
|
|
|
intf_plug_plug ( &local->xfer, xfer );
|
|
|
|
|
ref_put ( &local->refcnt );
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
err_len:
|
|
|
|
|
err_open_file:
|
|
|
|
|
err_open_root:
|
|
|
|
|
efi_local_close ( local, 0 );
|
|
|
|
|
ref_put ( &local->refcnt );
|
|
|
|
|
err_alloc:
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/** EFI local file URI opener */
|
|
|
|
|
struct uri_opener efi_local_uri_opener __uri_opener = {
|
|
|
|
|
.scheme = "file",
|
|
|
|
|
.open = efi_local_open,
|
|
|
|
|
};
|