1 files changed, 0 insertions, 355 deletions
diff --git a/gpxe/src/core/posix_io.c b/gpxe/src/core/posix_io.c
deleted file mode 100644
index e6b1a0f6..00000000
--- a/gpxe/src/core/posix_io.c
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- * 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.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <gpxe/list.h>
-#include <gpxe/xfer.h>
-#include <gpxe/open.h>
-#include <gpxe/process.h>
-#include <gpxe/posix_io.h>
-
-/** @file
- *
- * POSIX-like I/O
- *
- * These functions provide traditional blocking I/O semantics.  They
- * are designed to be used by the PXE TFTP API.  Because they block,
- * they may not be used by most other portions of the gPXE codebase.
- */
-
-/** An open file */
-struct posix_file {
-	/** Reference count for this object */
-	struct refcnt refcnt;
-	/** List of open files */
-	struct list_head list;
-	/** File descriptor */
-	int fd;
-	/** Overall status
-	 *
-	 * Set to -EINPROGRESS while data transfer is in progress.
-	 */
-	int rc;
-	/** Data transfer interface */
-	struct xfer_interface xfer;
-	/** Current seek position */
-	size_t pos;
-	/** File size */
-	size_t filesize;
-	/** Received data queue */
-	struct list_head data;
-};
-
-/** List of open files */
-static LIST_HEAD ( posix_files );
-
-/**
- * Free open file
- *
- * @v refcnt		Reference counter
- */
-static void posix_file_free ( struct refcnt *refcnt ) {
-	struct posix_file *file =
-		container_of ( refcnt, struct posix_file, refcnt );
-	struct io_buffer *iobuf;
-	struct io_buffer *tmp;
-
-	list_for_each_entry_safe ( iobuf, tmp, &file->data, list ) {
-		list_del ( &iobuf->list );
-		free_iob ( iobuf );
-	}
-	free ( file );
-}
-
-/**
- * Terminate file data transfer
- *
- * @v file		POSIX file
- * @v rc		Reason for termination
- */
-static void posix_file_finished ( struct posix_file *file, int rc ) {
-	xfer_nullify ( &file->xfer );
-	xfer_close ( &file->xfer, rc );
-	file->rc = rc;
-}
-
-/**
- * Handle close() event
- *
- * @v xfer		POSIX file data transfer interface
- * @v rc		Reason for close
- */
-static void posix_file_xfer_close ( struct xfer_interface *xfer, int rc ) {
-	struct posix_file *file =
-		container_of ( xfer, struct posix_file, xfer );
-
-	posix_file_finished ( file, rc );
-}
-
-/**
- * Handle deliver_iob() event
- *
- * @v xfer		POSIX file data transfer interface
- * @v iobuf		I/O buffer
- * @v meta		Data transfer metadata
- * @ret rc		Return status code
- */
-static int
-posix_file_xfer_deliver_iob ( struct xfer_interface *xfer,
-			      struct io_buffer *iobuf,
-			      struct xfer_metadata *meta ) {
-	struct posix_file *file =
-		container_of ( xfer, struct posix_file, xfer );
-
-	/* Keep track of file position solely for the filesize */
-	if ( meta->whence != SEEK_CUR )
-		file->pos = 0;
-	file->pos += meta->offset;
-	if ( file->filesize < file->pos )
-		file->filesize = file->pos;
-
-	if ( iob_len ( iobuf ) ) {
-		list_add_tail ( &iobuf->list, &file->data );
-	} else {
-		free_iob ( iobuf );
-	}
-
-	return 0;
-}
-
-/** POSIX file data transfer interface operations */
-static struct xfer_interface_operations posix_file_xfer_operations = {
-	.close		= posix_file_xfer_close,
-	.vredirect	= xfer_vreopen,
-	.window		= unlimited_xfer_window,
-	.alloc_iob	= default_xfer_alloc_iob,
-	.deliver_iob	= posix_file_xfer_deliver_iob,
-	.deliver_raw	= xfer_deliver_as_iob,
-};
-
-/**
- * Identify file by file descriptor
- *
- * @v fd		File descriptor
- * @ret file		Corresponding file, or NULL
- */
-static struct posix_file * posix_fd_to_file ( int fd ) {
-	struct posix_file *file;
-
-	list_for_each_entry ( file, &posix_files, list ) {
-		if ( file->fd == fd )
-			return file;
-	}
-	return NULL;
-}
-
-/**
- * Find an available file descriptor
- *
- * @ret fd		File descriptor, or negative error number
- */
-static int posix_find_free_fd ( void ) {
-	int fd;
-
-	for ( fd = POSIX_FD_MIN ; fd <= POSIX_FD_MAX ; fd++ ) {
-		if ( ! posix_fd_to_file ( fd ) )
-			return fd;
-	}
-	DBG ( "POSIX could not find free file descriptor\n" );
-	return -ENFILE;
-}
-
-/**
- * Open file
- *
- * @v uri_string	URI string
- * @ret fd		File descriptor, or negative error number
- */
-int open ( const char *uri_string ) {
-	struct posix_file *file;
-	int fd;
-	int rc;
-
-	/* Find a free file descriptor to use */
-	fd = posix_find_free_fd();
-	if ( fd < 0 )
-		return fd;
-
-	/* Allocate and initialise structure */
-	file = zalloc ( sizeof ( *file ) );
-	if ( ! file )
-		return -ENOMEM;
-	file->refcnt.free = posix_file_free;
-	file->fd = fd;
-	file->rc = -EINPROGRESS;
-	xfer_init ( &file->xfer, &posix_file_xfer_operations,
-		    &file->refcnt );
-	INIT_LIST_HEAD ( &file->data );
-
-	/* Open URI on data transfer interface */
-	if ( ( rc = xfer_open_uri_string ( &file->xfer, uri_string ) ) != 0 )
-		goto err;
-
-	/* Wait for open to succeed or fail */
-	while ( list_empty ( &file->data ) ) {
-		step();
-		if ( file->rc == 0 )
-			break;
-		if ( file->rc != -EINPROGRESS ) {
-			rc = file->rc;
-			goto err;
-		}
-	}
-
-	/* Add to list of open files.  List takes reference ownership. */
-	list_add ( &file->list, &posix_files );
-	DBG ( "POSIX opened %s as file %d\n", uri_string, fd );
-	return fd;
-
- err:
-	posix_file_finished ( file, rc );
-	ref_put ( &file->refcnt );
-	return rc;
-}
-
-/**
- * Check file descriptors for readiness
- *
- * @v readfds		File descriptors to check
- * @v wait		Wait until data is ready
- * @ret nready		Number of ready file descriptors
- */
-int select ( fd_set *readfds, int wait ) {
-	struct posix_file *file;
-	int fd;
-
-	do {
-		for ( fd = POSIX_FD_MIN ; fd <= POSIX_FD_MAX ; fd++ ) {
-			if ( ! FD_ISSET ( fd, readfds ) )
-				continue;
-			file = posix_fd_to_file ( fd );
-			if ( ! file )
-				return -EBADF;
-			if ( ( list_empty ( &file->data ) ) &&
-			     ( file->rc == -EINPROGRESS ) )
-				continue;
-			/* Data is available or status has changed */
-			FD_ZERO ( readfds );
-			FD_SET ( fd, readfds );
-			return 1;
-		}
-		step();
-	} while ( wait );
-
-	return 0;
-}
-
-/**
- * Read data from file
- *
- * @v buffer		Data buffer
- * @v offset		Starting offset within data buffer
- * @v len		Maximum length to read
- * @ret len		Actual length read, or negative error number
- *
- * This call is non-blocking; if no data is available to read then
- * -EWOULDBLOCK will be returned.
- */
-ssize_t read_user ( int fd, userptr_t buffer, off_t offset, size_t max_len ) {
-	struct posix_file *file;
-	struct io_buffer *iobuf;
-	size_t len;
-
-	/* Identify file */
-	file = posix_fd_to_file ( fd );
-	if ( ! file )
-		return -EBADF;
-
-	/* Try to fetch more data if none available */
-	if ( list_empty ( &file->data ) )
-		step();
-
-	/* Dequeue at most one received I/O buffer into user buffer */
-	list_for_each_entry ( iobuf, &file->data, list ) {
-		len = iob_len ( iobuf );
-		if ( len > max_len )
-			len = max_len;
-		copy_to_user ( buffer, offset, iobuf->data, len );
-		iob_pull ( iobuf, len );
-		if ( ! iob_len ( iobuf ) ) {
-			list_del ( &iobuf->list );
-			free_iob ( iobuf );
-		}
-		file->pos += len;
-		assert ( len != 0 );
-		return len;
-	}
-
-	/* If file has completed, return (after returning all data) */
-	if ( file->rc != -EINPROGRESS ) {
-		assert ( list_empty ( &file->data ) );
-		return file->rc;
-	}
-
-	/* No data ready and file still in progress; return -WOULDBLOCK */
-	return -EWOULDBLOCK;
-}
-
-/**
- * Determine file size
- *
- * @v fd		File descriptor
- * @ret size		File size, or negative error number
- */
-ssize_t fsize ( int fd ) {
-	struct posix_file *file;
-
-	/* Identify file */
-	file = posix_fd_to_file ( fd );
-	if ( ! file )
-		return -EBADF;
-
-	return file->filesize;
-}
-
-/**
- * Close file
- *
- * @v fd		File descriptor
- * @ret rc		Return status code
- */
-int close ( int fd ) {
-	struct posix_file *file;
-
-	/* Identify file */
-	file = posix_fd_to_file ( fd );
-	if ( ! file )
-		return -EBADF;
-
-	/* Terminate data transfer */
-	posix_file_finished ( file, 0 );
-
-	/* Remove from list of open files and drop reference */
-	list_del ( &file->list );
-	ref_put ( &file->refcnt );
-	return 0;
-}