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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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+
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+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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+
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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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+
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45
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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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+
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+/** Download blocksize */
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+#define EFI_LOCAL_BLKSIZE 4096
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+
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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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+
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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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+/**
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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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+
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+ /* Stop process */
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+ process_del ( &local->process );
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+
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+ /* Shut down data transfer interface */
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+ intf_shutdown ( &local->xfer, rc );
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+
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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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+
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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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+/**
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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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+
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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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+
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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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+
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+ /* Get file contents */
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+ while ( remaining ) {
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+
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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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+
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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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+
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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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+
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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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+
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+ /* Move to next block */
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+ remaining -= frag_len;
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+ }
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+
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+ /* Close download */
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+ efi_local_close ( local, 0 );
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+
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+ return;
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+
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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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+
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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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+
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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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+
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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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+/**
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ /* Success */
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+ rc = 0;
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+
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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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249
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+/**
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250
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+ * Open root filesystem
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251
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+ *
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252
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+ * @v local Local file
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253
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+ * @v device Device handle
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254
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+ * @v root Root filesystem handle to fill in
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255
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+ * @ret rc Return status code
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256
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+ */
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257
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+static int efi_local_open_root ( struct efi_local *local, EFI_HANDLE device,
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258
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+ EFI_FILE_PROTOCOL **root ) {
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259
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+ EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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260
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+ union {
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261
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+ void *interface;
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262
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+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *fs;
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263
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+ } u;
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264
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+ EFI_STATUS efirc;
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265
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+ int rc;
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266
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+
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267
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+ /* Open file system protocol */
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268
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+ if ( ( efirc = bs->OpenProtocol ( device,
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269
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+ &efi_simple_file_system_protocol_guid,
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270
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+ &u.interface, efi_image_handle,
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271
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+ device,
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272
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+ EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
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273
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+ rc = -EEFI ( efirc );
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274
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+ DBGC ( local, "LOCAL %p could not open filesystem on %s: %s\n",
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275
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+ local, efi_handle_name ( device ), strerror ( rc ) );
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276
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+ goto err_filesystem;
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277
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+ }
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278
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+
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279
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+ /* Open root directory */
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280
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+ if ( ( efirc = u.fs->OpenVolume ( u.fs, root ) ) != 0 ) {
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281
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+ rc = -EEFI ( efirc );
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282
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+ DBGC ( local, "LOCAL %p could not open volume on %s: %s\n",
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283
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+ local, efi_handle_name ( device ), strerror ( rc ) );
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284
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+ goto err_volume;
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285
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+ }
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286
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+
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287
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+ /* Success */
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288
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+ rc = 0;
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289
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+
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290
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+ err_volume:
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291
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+ bs->CloseProtocol ( device, &efi_simple_file_system_protocol_guid,
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292
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+ efi_image_handle, device );
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293
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+ err_filesystem:
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294
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+ return rc;
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295
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+}
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296
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+
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297
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+/**
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298
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+ * Open root filesystem of specified volume
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299
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+ *
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300
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+ * @v local Local file
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301
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+ * @v volume Volume name, or NULL to use loaded image's device
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302
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+ * @ret rc Return status code
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303
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+ */
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304
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+static int efi_local_open_volume ( struct efi_local *local,
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305
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+ const char *volume ) {
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306
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+ EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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307
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+ EFI_GUID *protocol = &efi_simple_file_system_protocol_guid;
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308
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+ int ( * check ) ( struct efi_local *local, EFI_HANDLE device,
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309
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+ EFI_FILE_PROTOCOL *root, const char *volume );
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310
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+ EFI_FILE_PROTOCOL *root;
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311
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+ EFI_HANDLE *handles;
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312
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+ EFI_HANDLE device;
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313
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+ UINTN num_handles;
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314
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+ UINTN i;
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|
315
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+ EFI_STATUS efirc;
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|
316
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+ int rc;
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|
317
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+
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318
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+ /* Identify candidate handles */
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319
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+ if ( volume ) {
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320
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+ /* Locate all filesystem handles */
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321
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+ if ( ( efirc = bs->LocateHandleBuffer ( ByProtocol, protocol,
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322
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+ NULL, &num_handles,
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323
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+ &handles ) ) != 0 ) {
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|
324
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+ rc = -EEFI ( efirc );
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|
325
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+ DBGC ( local, "LOCAL %p could not enumerate handles: "
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|
326
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+ "%s\n", local, strerror ( rc ) );
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|
327
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+ return rc;
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|
328
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+ }
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329
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+ check = efi_local_check_volume_name;
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|
330
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+ } else {
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331
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+ /* Use our loaded image's device handle */
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332
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+ handles = &efi_loaded_image->DeviceHandle;
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333
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+ num_handles = 1;
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334
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+ check = NULL;
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335
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+ }
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336
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+
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337
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+ /* Find matching handle */
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338
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+ for ( i = 0 ; i < num_handles ; i++ ) {
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339
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+
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340
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+ /* Get this device handle */
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341
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+ device = handles[i];
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342
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+
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343
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+ /* Open root directory */
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344
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+ if ( ( rc = efi_local_open_root ( local, device, &root ) ) != 0)
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345
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+ continue;
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346
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+
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|
347
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+ /* Check volume name, if applicable */
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348
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+ if ( ( check == NULL ) ||
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349
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+ ( ( rc = check ( local, device, root, volume ) ) == 0 ) ) {
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|
350
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+ DBGC ( local, "LOCAL %p using %s",
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351
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+ local, efi_handle_name ( device ) );
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352
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+ if ( volume )
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|
353
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+ DBGC ( local, " with label \"%s\"", volume );
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|
354
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+ DBGC ( local, "\n" );
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|
355
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+ local->root = root;
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|
356
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+ break;
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|
357
|
+ }
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|
358
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+
|
|
359
|
+ /* Close root directory */
|
|
360
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+ root->Close ( root );
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|
361
|
+ }
|
|
362
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+
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|
363
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+ /* Free handles, if applicable */
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|
364
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+ if ( volume )
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365
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+ bs->FreePool ( handles );
|
|
366
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+
|
|
367
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+ /* Fail if we found no matching handle */
|
|
368
|
+ if ( ! local->root ) {
|
|
369
|
+ DBGC ( local, "LOCAL %p found no matching handle\n", local );
|
|
370
|
+ return -ENOENT;
|
|
371
|
+ }
|
|
372
|
+
|
|
373
|
+ return 0;
|
|
374
|
+}
|
|
375
|
+
|
|
376
|
+/**
|
|
377
|
+ * Open fully-resolved path
|
|
378
|
+ *
|
|
379
|
+ * @v local Local file
|
|
380
|
+ * @v resolved Resolved path
|
|
381
|
+ * @ret rc Return status code
|
|
382
|
+ */
|
|
383
|
+static int efi_local_open_resolved ( struct efi_local *local,
|
|
384
|
+ const char *resolved ) {
|
|
385
|
+ size_t name_len = strlen ( resolved );
|
|
386
|
+ CHAR16 name[ name_len + 1 /* wNUL */ ];
|
|
387
|
+ EFI_FILE_PROTOCOL *file;
|
|
388
|
+ EFI_STATUS efirc;
|
|
389
|
+ int rc;
|
|
390
|
+
|
|
391
|
+ /* Construct filename */
|
|
392
|
+ efi_snprintf ( name, ( name_len + 1 /* wNUL */ ), "%s", resolved );
|
|
393
|
+
|
|
394
|
+ /* Open file */
|
|
395
|
+ if ( ( efirc = local->root->Open ( local->root, &file, name,
|
|
396
|
+ EFI_FILE_MODE_READ, 0 ) ) != 0 ) {
|
|
397
|
+ rc = -EEFI ( efirc );
|
|
398
|
+ DBGC ( local, "LOCAL %p could not open \"%s\": %s\n",
|
|
399
|
+ local, resolved, strerror ( rc ) );
|
|
400
|
+ return rc;
|
|
401
|
+ }
|
|
402
|
+ local->file = file;
|
|
403
|
+
|
|
404
|
+ return 0;
|
|
405
|
+}
|
|
406
|
+
|
|
407
|
+/**
|
|
408
|
+ * Open specified path
|
|
409
|
+ *
|
|
410
|
+ * @v local Local file
|
|
411
|
+ * @v path Path to file
|
|
412
|
+ * @ret rc Return status code
|
|
413
|
+ */
|
|
414
|
+static int efi_local_open_path ( struct efi_local *local, const char *path ) {
|
|
415
|
+ FILEPATH_DEVICE_PATH *fp = container_of ( efi_loaded_image->FilePath,
|
|
416
|
+ FILEPATH_DEVICE_PATH, Header);
|
|
417
|
+ size_t fp_len = ( fp ? efi_devpath_len ( &fp->Header ) : 0 );
|
|
418
|
+ char base[ fp_len / 2 /* Cannot exceed this length */ ];
|
|
419
|
+ size_t remaining = sizeof ( base );
|
|
420
|
+ size_t len;
|
|
421
|
+ char *resolved;
|
|
422
|
+ char *tmp;
|
|
423
|
+ int rc;
|
|
424
|
+
|
|
425
|
+ /* Construct base path to our own image, if possible */
|
|
426
|
+ memset ( base, 0, sizeof ( base ) );
|
|
427
|
+ tmp = base;
|
|
428
|
+ while ( fp && ( fp->Header.Type != END_DEVICE_PATH_TYPE ) ) {
|
|
429
|
+ len = snprintf ( tmp, remaining, "%ls", fp->PathName );
|
|
430
|
+ assert ( len < remaining );
|
|
431
|
+ tmp += len;
|
|
432
|
+ remaining -= len;
|
|
433
|
+ fp = ( ( ( void * ) fp ) + ( ( fp->Header.Length[1] << 8 ) |
|
|
434
|
+ fp->Header.Length[0] ) );
|
|
435
|
+ }
|
|
436
|
+ DBGC2 ( local, "LOCAL %p base path \"%s\"\n",
|
|
437
|
+ local, base );
|
|
438
|
+
|
|
439
|
+ /* Convert to sane path separators */
|
|
440
|
+ for ( tmp = base ; *tmp ; tmp++ ) {
|
|
441
|
+ if ( *tmp == '\\' )
|
|
442
|
+ *tmp = '/';
|
|
443
|
+ }
|
|
444
|
+
|
|
445
|
+ /* Resolve path */
|
|
446
|
+ resolved = resolve_path ( base, path );
|
|
447
|
+ if ( ! resolved ) {
|
|
448
|
+ rc = -ENOMEM;
|
|
449
|
+ goto err_resolve;
|
|
450
|
+ }
|
|
451
|
+
|
|
452
|
+ /* Convert to insane path separators */
|
|
453
|
+ for ( tmp = resolved ; *tmp ; tmp++ ) {
|
|
454
|
+ if ( *tmp == '/' )
|
|
455
|
+ *tmp = '\\';
|
|
456
|
+ }
|
|
457
|
+ DBGC ( local, "LOCAL %p using \"%s\"\n",
|
|
458
|
+ local, resolved );
|
|
459
|
+
|
|
460
|
+ /* Open resolved path */
|
|
461
|
+ if ( ( rc = efi_local_open_resolved ( local, resolved ) ) != 0 )
|
|
462
|
+ goto err_open;
|
|
463
|
+
|
|
464
|
+ err_open:
|
|
465
|
+ free ( resolved );
|
|
466
|
+ err_resolve:
|
|
467
|
+ return rc;
|
|
468
|
+}
|
|
469
|
+
|
|
470
|
+/**
|
|
471
|
+ * Get file length
|
|
472
|
+ *
|
|
473
|
+ * @v local Local file
|
|
474
|
+ * @ret rc Return status code
|
|
475
|
+ */
|
|
476
|
+static int efi_local_len ( struct efi_local *local ) {
|
|
477
|
+ EFI_FILE_PROTOCOL *file = local->file;
|
|
478
|
+ EFI_FILE_INFO *info;
|
|
479
|
+ EFI_STATUS efirc;
|
|
480
|
+ UINTN size;
|
|
481
|
+ int rc;
|
|
482
|
+
|
|
483
|
+ /* Get size of file information */
|
|
484
|
+ size = 0;
|
|
485
|
+ file->GetInfo ( file, &efi_file_info_id, &size, NULL );
|
|
486
|
+
|
|
487
|
+ /* Allocate file information */
|
|
488
|
+ info = malloc ( size );
|
|
489
|
+ if ( ! info ) {
|
|
490
|
+ rc = -ENOMEM;
|
|
491
|
+ goto err_alloc;
|
|
492
|
+ }
|
|
493
|
+
|
|
494
|
+ /* Get file information */
|
|
495
|
+ if ( ( efirc = file->GetInfo ( file, &efi_file_info_id, &size,
|
|
496
|
+ info ) ) != 0 ) {
|
|
497
|
+ rc = -EEFI ( efirc );
|
|
498
|
+ DBGC ( local, "LOCAL %p could not get file info: %s\n",
|
|
499
|
+ local, strerror ( rc ) );
|
|
500
|
+ goto err_info;
|
|
501
|
+ }
|
|
502
|
+
|
|
503
|
+ /* Record file length */
|
|
504
|
+ local->len = info->FileSize;
|
|
505
|
+
|
|
506
|
+ /* Success */
|
|
507
|
+ rc = 0;
|
|
508
|
+
|
|
509
|
+ err_info:
|
|
510
|
+ free ( info );
|
|
511
|
+ err_alloc:
|
|
512
|
+ return rc;
|
|
513
|
+}
|
|
514
|
+
|
|
515
|
+/**
|
|
516
|
+ * Open local file
|
|
517
|
+ *
|
|
518
|
+ * @v xfer Data transfer interface
|
|
519
|
+ * @v uri Request URI
|
|
520
|
+ * @ret rc Return status code
|
|
521
|
+ */
|
|
522
|
+static int efi_local_open ( struct interface *xfer, struct uri *uri ) {
|
|
523
|
+ struct efi_local *local;
|
|
524
|
+ const char *volume;
|
|
525
|
+ const char *path;
|
|
526
|
+ int rc;
|
|
527
|
+
|
|
528
|
+ /* Parse URI */
|
|
529
|
+ volume = ( ( uri->host && uri->host[0] ) ? uri->host : NULL );
|
|
530
|
+ path = ( uri->opaque ? uri->opaque : uri->path );
|
|
531
|
+
|
|
532
|
+ /* Allocate and initialise structure */
|
|
533
|
+ local = zalloc ( sizeof ( *local ) );
|
|
534
|
+ if ( ! local ) {
|
|
535
|
+ rc = -ENOMEM;
|
|
536
|
+ goto err_alloc;
|
|
537
|
+ }
|
|
538
|
+ ref_init ( &local->refcnt, NULL );
|
|
539
|
+ intf_init ( &local->xfer, &efi_local_xfer_desc, &local->refcnt );
|
|
540
|
+ process_init ( &local->process, &efi_local_process_desc,
|
|
541
|
+ &local->refcnt );
|
|
542
|
+
|
|
543
|
+ /* Open specified volume */
|
|
544
|
+ if ( ( rc = efi_local_open_volume ( local, volume ) ) != 0 )
|
|
545
|
+ goto err_open_root;
|
|
546
|
+
|
|
547
|
+ /* Open specified path */
|
|
548
|
+ if ( ( rc = efi_local_open_path ( local, path ) ) != 0 )
|
|
549
|
+ goto err_open_file;
|
|
550
|
+
|
|
551
|
+ /* Get length of file */
|
|
552
|
+ if ( ( rc = efi_local_len ( local ) ) != 0 )
|
|
553
|
+ goto err_len;
|
|
554
|
+
|
|
555
|
+ /* Attach to parent interface, mortalise self, and return */
|
|
556
|
+ intf_plug_plug ( &local->xfer, xfer );
|
|
557
|
+ ref_put ( &local->refcnt );
|
|
558
|
+ return 0;
|
|
559
|
+
|
|
560
|
+ err_len:
|
|
561
|
+ err_open_file:
|
|
562
|
+ err_open_root:
|
|
563
|
+ efi_local_close ( local, 0 );
|
|
564
|
+ ref_put ( &local->refcnt );
|
|
565
|
+ err_alloc:
|
|
566
|
+ return rc;
|
|
567
|
+}
|
|
568
|
+
|
|
569
|
+/** EFI local file URI opener */
|
|
570
|
+struct uri_opener efi_local_uri_opener __uri_opener = {
|
|
571
|
+ .scheme = "file",
|
|
572
|
+ .open = efi_local_open,
|
|
573
|
+};
|