Add PXE FILE API.

src/arch/i386/interface/pxe/pxe_call.c

@@ -91,6 +91,11 @@ union pxenv_call {
 			( struct s_PXENV_UNDI_GET_IFACE_INFO * );
 	PXENV_EXIT_t ( * undi_get_state ) ( struct s_PXENV_UNDI_GET_STATE * );
 	PXENV_EXIT_t ( * undi_isr ) ( struct s_PXENV_UNDI_ISR * );
+	PXENV_EXIT_t ( * file_open ) ( struct s_PXENV_FILE_OPEN * );
+	PXENV_EXIT_t ( * file_close ) ( struct s_PXENV_FILE_CLOSE * );
+	PXENV_EXIT_t ( * file_select ) ( struct s_PXENV_FILE_SELECT * );
+	PXENV_EXIT_t ( * file_read ) ( struct s_PXENV_FILE_READ * );
+	PXENV_EXIT_t ( * get_file_size ) ( struct s_PXENV_GET_FILE_SIZE * );
 };
 
 /**
@@ -269,6 +274,26 @@ __cdecl void pxe_api_call ( struct i386_all_regs *ix86 ) {
 		pxenv_call.undi_isr = pxenv_undi_isr;
 		param_len = sizeof ( pxenv_any.undi_isr );
 		break;
+	case PXENV_FILE_OPEN:
+		pxenv_call.file_open = pxenv_file_open;
+		param_len = sizeof ( pxenv_any.file_open );
+		break;
+	case PXENV_FILE_CLOSE:
+		pxenv_call.file_close = pxenv_file_close;
+		param_len = sizeof ( pxenv_any.file_close );
+		break;
+	case PXENV_FILE_SELECT:
+		pxenv_call.file_select = pxenv_file_select;
+		param_len = sizeof ( pxenv_any.file_select );
+		break;
+	case PXENV_FILE_READ:
+		pxenv_call.file_read = pxenv_file_read;
+		param_len = sizeof ( pxenv_any.file_read );
+		break;
+	case PXENV_GET_FILE_SIZE:
+		pxenv_call.get_file_size = pxenv_get_file_size;
+		param_len = sizeof ( pxenv_any.get_file_size );
+		break;
 	default:
 		DBG ( "PXENV_UNKNOWN_%hx", opcode );
 		pxenv_call.unknown = pxenv_unknown;

src/include/pxe.h

@@ -58,6 +58,11 @@ union u_PXENV_ANY {
 	struct s_PXENV_UNDI_GET_IFACE_INFO	undi_get_iface_info;
 	struct s_PXENV_UNDI_GET_STATE		undi_get_state;
 	struct s_PXENV_UNDI_ISR			undi_isr;
+	struct s_PXENV_FILE_OPEN		file_open;
+	struct s_PXENV_FILE_CLOSE		file_close;
+	struct s_PXENV_FILE_SELECT		file_select;
+	struct s_PXENV_FILE_READ		file_read;
+	struct s_PXENV_GET_FILE_SIZE		get_file_size;
 };
 
 typedef union u_PXENV_ANY PXENV_ANY_t;

src/include/pxe_api.h

@@ -1555,6 +1555,137 @@ extern PXENV_EXIT_t pxenv_undi_isr ( struct s_PXENV_UNDI_ISR *undi_isr );
 
 /** @} */ /* pxe_undi_api */
 
+/** @defgroup pxe_file_api PXE FILE API
+ *
+ * POSIX-like file operations
+ *
+ * @{
+ */
+
+/** @defgroup pxenv_file_open PXENV_FILE_OPEN
+ *
+ * FILE OPEN
+ *
+ * @{
+ */
+
+/** PXE API function code for pxenv_file_open() */
+#define PXENV_FILE_OPEN			0x00e0
+
+/** Parameter block for pxenv_file_open() */
+struct s_PXENV_FILE_OPEN {
+	PXENV_STATUS_t Status;		/**< PXE status code */
+	UINT16_t FileHandle;		/**< File handle */
+	SEGOFF16_t FileName;		/**< File URL */
+	UINT32_t Reserved;		/**< Reserved */
+} PACKED;
+
+typedef struct s_PXENV_FILE_OPEN PXENV_FILE_OPEN_t;
+
+extern PXENV_EXIT_t pxenv_file_open ( struct s_PXENV_FILE_OPEN *file_open );
+
+/** @} */ /* pxenv_file_open */
+
+/** @defgroup pxenv_file_close PXENV_FILE_CLOSE
+ *
+ * FILE CLOSE
+ *
+ * @{
+ */
+
+/** PXE API function code for pxenv_file_close() */
+#define PXENV_FILE_CLOSE		0x00e1
+
+/** Parameter block for pxenv_file_close() */
+struct s_PXENV_FILE_CLOSE {
+	PXENV_STATUS_t Status;		/**< PXE status code */
+	UINT16_t FileHandle;		/**< File handle */
+} PACKED;
+
+typedef struct s_PXENV_FILE_CLOSE PXENV_FILE_CLOSE_t;
+
+extern PXENV_EXIT_t pxenv_file_close ( struct s_PXENV_FILE_CLOSE
+				       *file_close );
+
+/** @} */ /* pxenv_file_close */
+
+/** @defgroup pxenv_file_select PXENV_FILE_SELECT
+ *
+ * FILE SELECT
+ *
+ * @{
+ */
+
+/** PXE API function code for pxenv_file_select() */
+#define PXENV_FILE_SELECT		0x00e2
+
+/** File is ready for reading */
+#define RDY_READ			0x0001
+
+/** Parameter block for pxenv_file_select() */
+struct s_PXENV_FILE_SELECT {
+	PXENV_STATUS_t Status;		/**< PXE status code */
+	UINT16_t FileHandle;		/**< File handle */
+	UINT16_t Ready;			/**< Indication of readiness */
+} PACKED;
+
+typedef struct s_PXENV_FILE_SELECT PXENV_FILE_SELECT_t;
+
+extern PXENV_EXIT_t pxenv_file_select ( struct s_PXENV_FILE_SELECT
+					*file_select );
+
+/** @} */ /* pxenv_file_select */
+
+/** @defgroup pxenv_file_read PXENV_FILE_READ
+ *
+ * FILE READ
+ *
+ * @{
+ */
+
+/** PXE API function code for pxenv_file_read() */
+#define PXENV_FILE_READ		0x00e3
+
+/** Parameter block for pxenv_file_read() */
+struct s_PXENV_FILE_READ {
+	PXENV_STATUS_t Status;		/**< PXE status code */
+	UINT16_t FileHandle;		/**< File handle */
+	UINT16_t BufferSize;		/**< Data buffer size */
+	SEGOFF16_t Buffer;		/**< Data buffer */
+} PACKED;
+
+typedef struct s_PXENV_FILE_READ PXENV_FILE_READ_t;
+
+extern PXENV_EXIT_t pxenv_file_read ( struct s_PXENV_FILE_READ *file_read );
+
+/** @} */ /* pxenv_file_read */
+
+/** @defgroup pxenv_get_file_size PXENV_GET_FILE_SIZE
+ *
+ * GET FILE SIZE
+ *
+ * @{
+ */
+
+/** PXE API function code for pxenv_get_file_size() */
+#define PXENV_GET_FILE_SIZE		0x00e4
+
+/** Parameter block for pxenv_get_file_size() */
+struct s_PXENV_GET_FILE_SIZE {
+	PXENV_STATUS_t Status;		/**< PXE status code */
+	UINT16_t FileHandle;		/**< File handle */
+	UINT32_t FileSize;		/**< File size */
+} PACKED;
+
+typedef struct s_PXENV_GET_FILE_SIZE PXENV_GET_FILE_SIZE_t;
+
+extern PXENV_EXIT_t pxenv_get_file_size ( struct s_PXENV_GET_FILE_SIZE
+					  *get_file_size );
+
+/** @} */ /* pxenv_get_file_size */
+
+/** @} */ /* pxe_file_api */
+
 /** @defgroup pxe_loader_api PXE Loader API
  *
  * The UNDI ROM loader API

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;
+}