imgmgmt.c

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/*
 * 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.
 *
 * You can also choose to distribute this program under the terms of
 * the Unmodified Binary Distribution Licence (as given in the file
 * COPYING.UBDL), provided that you have satisfied its requirements.
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
FILE_SECBOOT ( PERMITTED );

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ipxe/image.h>
#include <ipxe/downloader.h>
#include <ipxe/monojob.h>
#include <ipxe/open.h>
#include <ipxe/uri.h>
#include <usr/imgmgmt.h>

/** @file
 *
 * Image management
 *
 */

/**
 * Download a new image
 *
 * @v uri               URI
 * @v timeout           Download timeout
 * @v image             Image to fill in
 * @ret rc              Return status code
 */
int imgdownload ( struct uri *uri, unsigned long timeout,
                  struct image **image ) {
        struct uri uri_redacted;
        char *uri_string_redacted;
        int rc;

        /* Construct redacted URI */
        memcpy ( &uri_redacted, uri, sizeof ( uri_redacted ) );
        uri_redacted.user = NULL;
        uri_redacted.password = NULL;
        uri_redacted.equery = NULL;
        uri_redacted.efragment = NULL;
        uri_string_redacted = format_uri_alloc ( &uri_redacted );
        if ( ! uri_string_redacted ) {
                rc = -ENOMEM;
                goto err_uri_string;
        }

        /* Resolve URI */
        uri = resolve_uri ( cwuri, uri );
        if ( ! uri ) {
                rc = -ENOMEM;
                goto err_resolve_uri;
        }

        /* Allocate image */
        *image = alloc_image ( uri );
        if ( ! *image ) {
                rc = -ENOMEM;
                goto err_alloc_image;
        }

        /* Create downloader */
        if ( ( rc = create_downloader ( &monojob, *image ) ) != 0 ) {
                printf ( "Could not start download: %s\n", strerror ( rc ) );
                goto err_create_downloader;
        }

        /* Wait for download to complete */
        if ( ( rc = monojob_wait ( uri_string_redacted, timeout ) ) != 0 )
                goto err_monojob_wait;

        /* Register image */
        if ( ( rc = register_image ( *image ) ) != 0 ) {
                printf ( "Could not register image: %s\n", strerror ( rc ) );
                goto err_register_image;
        }

 err_register_image:
 err_monojob_wait:
 err_create_downloader:
        image_put ( *image );
 err_alloc_image:
        uri_put ( uri );
 err_resolve_uri:
        free ( uri_string_redacted );
 err_uri_string:
        return rc;
}

/**
 * Download a new image
 *
 * @v uri_string        URI string
 * @v timeout           Download timeout
 * @v image             Image to fill in
 * @ret rc              Return status code
 */
int imgdownload_string ( const char *uri_string, unsigned long timeout,
                         struct image **image ) {
        struct uri *uri;
        int rc;

        if ( ! ( uri = parse_uri ( uri_string ) ) )
                return -ENOMEM;

        rc = imgdownload ( uri, timeout, image );

        uri_put ( uri );
        return rc;
}

/**
 * Acquire an image
 *
 * @v name_uri          Name or URI string
 * @v timeout           Download timeout
 * @v image             Image to fill in
 * @ret rc              Return status code
 */
int imgacquire ( const char *name_uri, unsigned long timeout,
                 struct image **image ) {

        /* If we already have an image with the specified name, use it */
        *image = find_image ( name_uri );
        if ( *image )
                return 0;

        /* Otherwise, download a new image */
        return imgdownload_string ( name_uri, timeout, image );
}

/**
 * Display status of an image
 *
 * @v image             Executable/loadable image
 */
void imgstat ( struct image *image ) {
        struct image_tag *tag;

        printf ( "%s : %zd bytes", image->name, image->len );
        if ( image->type )
                printf ( " [%s]", image->type->name );
        for_each_table_entry ( tag, IMAGE_TAGS ) {
                if ( tag->image == image )
                        printf ( " [%s]", tag->name );
        }
        if ( image->flags & IMAGE_TRUSTED )
                printf ( " [TRUSTED]" );
        if ( image->flags & IMAGE_AUTO_UNREGISTER )
                printf ( " [AUTOFREE]" );
        if ( image->flags & IMAGE_HIDDEN )
                printf ( " [HIDDEN]" );
        if ( image->cmdline )
                printf ( " \"%s\"", image->cmdline );
        printf ( "\n" );
}

/**
 * Create image from block of memory
 *
 * @v name              Name
 * @v data              Image data
 * @v len               Length
 * @ret rc              Return status code
 */
int imgmem ( const char *name, const void *data, size_t len ) {
        struct image *image;

        /* Create image */
        image = image_memory ( name, data, len );
        if ( ! image ) {
                printf ( "Could not create image\n" );
                return -ENOMEM;
        }

        return 0;
}