Add PXE FILE API.

1 files changed, 191 insertions, 0 deletions

diff --git a/src/interface/pxe/pxe_file.c b/src/interface/pxe/pxe_file.c
new file mode 100644
index 000000000..01dac8f7d
--- /dev/null
+++ b/src/interface/pxe/pxe_file.c
@@ -0,0 +1,191 @@
+/** @file
+ *
+ * PXE FILE API
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <gpxe/uaccess.h>
+#include <gpxe/posix_io.h>
+#include <gpxe/features.h>
+#include <pxe.h>
+
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FEATURE ( FEATURE_MISC, "PXEXT", DHCP_EB_FEATURE_PXE_EXT, 1 );
+
+/**
+ * FILE OPEN
+ *
+ * @v file_open				Pointer to a struct s_PXENV_FILE_OPEN
+ * @v s_PXENV_FILE_OPEN::FileName	URL of file to open
+ * @ret #PXENV_EXIT_SUCCESS		File was opened
+ * @ret #PXENV_EXIT_FAILURE		File was not opened
+ * @ret s_PXENV_FILE_OPEN::Status	PXE status code
+ * @ret s_PXENV_FILE_OPEN::FileHandle	Handle of opened file
+ *
+ */
+PXENV_EXIT_t pxenv_file_open ( struct s_PXENV_FILE_OPEN *file_open ) {
+	userptr_t filename;
+	size_t filename_len;
+	int fd;
+
+	DBG ( "PXENV_FILE_OPEN" );
+
+	/* Copy name from external program, and open it */
+	filename = real_to_user ( file_open->FileName.segment,
+			      file_open->FileName.offset );
+	filename_len = strlen_user ( filename, 0 );
+	{
+		char uri_string[ filename_len + 1 ];
+
+		copy_from_user ( uri_string, filename, 0,
+				 sizeof ( uri_string ) );
+		DBG ( " %s", uri_string );
+		fd = open ( uri_string );
+	}
+
+	if ( fd < 0 ) {
+		file_open->Status = PXENV_STATUS ( fd );
+		return PXENV_EXIT_FAILURE;
+	}
+
+	DBG ( " as file %d", fd );
+
+	file_open->FileHandle = fd;
+	file_open->Status = PXENV_STATUS_SUCCESS;
+	return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * FILE CLOSE
+ *
+ * @v file_close			Pointer to a struct s_PXENV_FILE_CLOSE
+ * @v s_PXENV_FILE_CLOSE::FileHandle	File handle
+ * @ret #PXENV_EXIT_SUCCESS		File was closed
+ * @ret #PXENV_EXIT_FAILURE		File was not closed
+ * @ret s_PXENV_FILE_CLOSE::Status	PXE status code
+ *
+ */
+PXENV_EXIT_t pxenv_file_close ( struct s_PXENV_FILE_CLOSE *file_close ) {
+
+	DBG ( "PXENV_FILE_CLOSE %d", file_close->FileHandle );
+
+	close ( file_close->FileHandle );
+	file_close->Status = PXENV_STATUS_SUCCESS;
+	return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * FILE SELECT
+ *
+ * @v file_select			Pointer to a struct s_PXENV_FILE_SELECT
+ * @v s_PXENV_FILE_SELECT::FileHandle	File handle
+ * @ret #PXENV_EXIT_SUCCESS		File has been checked for readiness
+ * @ret #PXENV_EXIT_FAILURE		File has not been checked for readiness
+ * @ret s_PXENV_FILE_SELECT::Status	PXE status code
+ * @ret s_PXENV_FILE_SELECT::Ready	Indication of readiness
+ *
+ */
+PXENV_EXIT_t pxenv_file_select ( struct s_PXENV_FILE_SELECT *file_select ) {
+	fd_set fdset;
+	int ready;
+
+	DBG ( "PXENV_FILE_SELECT %d", file_select->FileHandle );
+
+	FD_ZERO ( &fdset );
+	FD_SET ( file_select->FileHandle, &fdset );
+	if ( ( ready = select ( &fdset, 0 ) ) < 0 ) {
+		file_select->Status = PXENV_STATUS ( ready );
+		return PXENV_EXIT_FAILURE;
+	}
+
+	file_select->Ready = ( ready ? RDY_READ : 0 );
+	file_select->Status = PXENV_STATUS_SUCCESS;
+	return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * FILE READ
+ *
+ * @v file_read				Pointer to a struct s_PXENV_FILE_READ
+ * @v s_PXENV_FILE_READ::FileHandle	File handle
+ * @v s_PXENV_FILE_READ::BufferSize	Size of data buffer
+ * @v s_PXENV_FILE_READ::Buffer		Data buffer
+ * @ret #PXENV_EXIT_SUCCESS		Data has been read from file
+ * @ret #PXENV_EXIT_FAILURE		Data has not been read from file
+ * @ret s_PXENV_FILE_READ::Status	PXE status code
+ * @ret s_PXENV_FILE_READ::Ready	Indication of readiness
+ * @ret s_PXENV_FILE_READ::BufferSize	Length of data read
+ *
+ */
+PXENV_EXIT_t pxenv_file_read ( struct s_PXENV_FILE_READ *file_read ) {
+	userptr_t buffer;
+	ssize_t len;
+
+	DBG ( "PXENV_FILE_READ %d to %04x:%04x+%04x", file_read->FileHandle,
+	      file_read->Buffer.segment, file_read->Buffer.offset,
+	      file_read->BufferSize );
+
+	buffer = real_to_user ( file_read->Buffer.segment,
+				file_read->Buffer.offset );
+	if ( ( len = read_user ( file_read->FileHandle, buffer, 0,
+				file_read->BufferSize ) ) < 0 ) {
+		file_read->Status = PXENV_STATUS ( len );
+		return PXENV_EXIT_FAILURE;
+	}
+
+	DBG ( " read %04zx", ( ( size_t ) len ) );
+
+	file_read->BufferSize = len;
+	file_read->Status = PXENV_STATUS_SUCCESS;
+	return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * GET FILE SIZE
+ *
+ * @v get_file_size			Pointer to a struct s_PXENV_GET_FILE_SIZE
+ * @v s_PXENV_GET_FILE_SIZE::FileHandle	File handle
+ * @ret #PXENV_EXIT_SUCCESS		File size has been determined
+ * @ret #PXENV_EXIT_FAILURE		File size has not been determined
+ * @ret s_PXENV_GET_FILE_SIZE::Status	PXE status code
+ * @ret s_PXENV_GET_FILE_SIZE::FileSize	Size of file
+ */
+PXENV_EXIT_t pxenv_get_file_size ( struct s_PXENV_GET_FILE_SIZE
+				   *get_file_size ) {
+	ssize_t filesize;
+
+	DBG ( "PXENV_GET_FILE_SIZE %d", get_file_size->FileHandle );
+
+	filesize = fsize ( get_file_size->FileHandle );
+	if ( filesize < 0 ) {
+		get_file_size->Status = PXENV_STATUS ( filesize );
+		return PXENV_EXIT_FAILURE;
+	}
+
+	DBG ( " is %zd", ( ( size_t ) filesize ) );
+
+	get_file_size->FileSize = filesize;
+	get_file_size->Status = PXENV_STATUS_SUCCESS;
+	return PXENV_EXIT_SUCCESS;
+}