--- /dev/null
+/** @file
+ *
+ * PXE FILE API
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <ipxe/uaccess.h>
+#include <ipxe/posix_io.h>
+#include <ipxe/features.h>
+#include <pxe.h>
+#include <realmode.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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+FEATURE ( FEATURE_MISC, "PXEXT", DHCP_EB_FEATURE_PXE_EXT, 2 );
+
+/**
+ * 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
+ *
+ */
+static 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
+ *
+ */
+static 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
+ *
+ */
+static 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
+ *
+ */
+static 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
+ */
+static 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;
+}
+
+/**
+ * FILE EXEC
+ *
+ * @v file_exec Pointer to a struct s_PXENV_FILE_EXEC
+ * @v s_PXENV_FILE_EXEC::Command Command to execute
+ * @ret #PXENV_EXIT_SUCCESS Command was executed successfully
+ * @ret #PXENV_EXIT_FAILURE Command was not executed successfully
+ * @ret s_PXENV_FILE_EXEC::Status PXE status code
+ *
+ */
+static PXENV_EXIT_t pxenv_file_exec ( struct s_PXENV_FILE_EXEC *file_exec ) {
+ userptr_t command;
+ size_t command_len;
+ int rc;
+
+ DBG ( "PXENV_FILE_EXEC" );
+
+ /* Copy name from external program, and exec it */
+ command = real_to_user ( file_exec->Command.segment,
+ file_exec->Command.offset );
+ command_len = strlen_user ( command, 0 );
+ {
+ char command_string[ command_len + 1 ];
+
+ copy_from_user ( command_string, command, 0,
+ sizeof ( command_string ) );
+ DBG ( " %s", command_string );
+
+ if ( ( rc = system ( command_string ) ) != 0 ) {
+ file_exec->Status = PXENV_STATUS ( rc );
+ return PXENV_EXIT_FAILURE;
+ }
+ }
+
+ file_exec->Status = PXENV_STATUS_SUCCESS;
+ return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * FILE CMDLINE
+ *
+ * @v file_cmdline Pointer to a struct s_PXENV_FILE_CMDLINE
+ * @v s_PXENV_FILE_CMDLINE::Buffer Buffer to contain command line
+ * @v s_PXENV_FILE_CMDLINE::BufferSize Size of buffer
+ * @ret #PXENV_EXIT_SUCCESS Command was executed successfully
+ * @ret #PXENV_EXIT_FAILURE Command was not executed successfully
+ * @ret s_PXENV_FILE_EXEC::Status PXE status code
+ * @ret s_PXENV_FILE_EXEC::BufferSize Length of command line (including NUL)
+ *
+ */
+static PXENV_EXIT_t
+pxenv_file_cmdline ( struct s_PXENV_FILE_CMDLINE *file_cmdline ) {
+ userptr_t buffer;
+ size_t max_len;
+ size_t len;
+
+ DBG ( "PXENV_FILE_CMDLINE to %04x:%04x+%04x \"%s\"\n",
+ file_cmdline->Buffer.segment, file_cmdline->Buffer.offset,
+ file_cmdline->BufferSize, pxe_cmdline );
+
+ buffer = real_to_user ( file_cmdline->Buffer.segment,
+ file_cmdline->Buffer.offset );
+ len = file_cmdline->BufferSize;
+ max_len = ( pxe_cmdline ?
+ ( strlen ( pxe_cmdline ) + 1 /* NUL */ ) : 0 );
+ if ( len > max_len )
+ len = max_len;
+ copy_to_user ( buffer, 0, pxe_cmdline, len );
+ file_cmdline->BufferSize = max_len;
+
+ file_cmdline->Status = PXENV_STATUS_SUCCESS;
+ return PXENV_EXIT_SUCCESS;
+}
+
+/**
+ * FILE API CHECK
+ *
+ * @v file_exec Pointer to a struct s_PXENV_FILE_API_CHECK
+ * @v s_PXENV_FILE_API_CHECK::Magic Inbound magic number (0x91d447b2)
+ * @ret #PXENV_EXIT_SUCCESS Command was executed successfully
+ * @ret #PXENV_EXIT_FAILURE Command was not executed successfully
+ * @ret s_PXENV_FILE_API_CHECK::Status PXE status code
+ * @ret s_PXENV_FILE_API_CHECK::Magic Outbound magic number (0xe9c17b20)
+ * @ret s_PXENV_FILE_API_CHECK::Provider "iPXE" (0x45585067)
+ * @ret s_PXENV_FILE_API_CHECK::APIMask API function bitmask
+ * @ret s_PXENV_FILE_API_CHECK::Flags Reserved
+ *
+ */
+static PXENV_EXIT_t
+pxenv_file_api_check ( struct s_PXENV_FILE_API_CHECK *file_api_check ) {
+ struct pxe_api_call *call;
+ unsigned int mask = 0;
+ unsigned int offset;
+
+ DBG ( "PXENV_FILE_API_CHECK" );
+
+ /* Check for magic value */
+ if ( file_api_check->Magic != 0x91d447b2 ) {
+ file_api_check->Status = PXENV_STATUS_BAD_FUNC;
+ return PXENV_EXIT_FAILURE;
+ }
+
+ /* Check for required parameter size */
+ if ( file_api_check->Size < sizeof ( *file_api_check ) ) {
+ file_api_check->Status = PXENV_STATUS_OUT_OF_RESOURCES;
+ return PXENV_EXIT_FAILURE;
+ }
+
+ /* Determine supported calls */
+ for_each_table_entry ( call, PXE_API_CALLS ) {
+ offset = ( call->opcode - PXENV_FILE_MIN );
+ if ( offset <= ( PXENV_FILE_MAX - PXENV_FILE_MIN ) )
+ mask |= ( 1 << offset );
+ }
+
+ /* Fill in parameters */
+ file_api_check->Size = sizeof ( *file_api_check );
+ file_api_check->Magic = 0xe9c17b20;
+ file_api_check->Provider = 0x45585067; /* "iPXE" */
+ file_api_check->APIMask = mask;
+ file_api_check->Flags = 0; /* None defined */
+
+ file_api_check->Status = PXENV_STATUS_SUCCESS;
+ return PXENV_EXIT_SUCCESS;
+}
+
+/** PXE file API */
+struct pxe_api_call pxe_file_api[] __pxe_api_call = {
+ PXE_API_CALL ( PXENV_FILE_OPEN, pxenv_file_open,
+ struct s_PXENV_FILE_OPEN ),
+ PXE_API_CALL ( PXENV_FILE_CLOSE, pxenv_file_close,
+ struct s_PXENV_FILE_CLOSE ),
+ PXE_API_CALL ( PXENV_FILE_SELECT, pxenv_file_select,
+ struct s_PXENV_FILE_SELECT ),
+ PXE_API_CALL ( PXENV_FILE_READ, pxenv_file_read,
+ struct s_PXENV_FILE_READ ),
+ PXE_API_CALL ( PXENV_GET_FILE_SIZE, pxenv_get_file_size,
+ struct s_PXENV_GET_FILE_SIZE ),
+ PXE_API_CALL ( PXENV_FILE_EXEC, pxenv_file_exec,
+ struct s_PXENV_FILE_EXEC ),
+ PXE_API_CALL ( PXENV_FILE_CMDLINE, pxenv_file_cmdline,
+ struct s_PXENV_FILE_CMDLINE ),
+ PXE_API_CALL ( PXENV_FILE_API_CHECK, pxenv_file_api_check,
+ struct s_PXENV_FILE_API_CHECK ),
+};
Code Review / kvmfornfv.git / blobdiff