234 lines
6.6 KiB
C
234 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* fs/partitions/fit.c
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* Copyright (C) 2021 Daniel Golle
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*
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* headers extracted from U-Boot mkimage sources
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* (C) Copyright 2008 Semihalf
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* (C) Copyright 2000-2005
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* based on existing partition parsers
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* Copyright (C) 1991-1998 Linus Torvalds
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* Re-organised Feb 1998 Russell King
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*/
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#define pr_fmt(fmt) fmt
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#include <linux/types.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_fdt.h>
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#include <linux/libfdt.h>
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#include "check.h"
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#define FIT_IMAGES_PATH "/images"
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#define FIT_CONFS_PATH "/configurations"
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/* hash/signature/key node */
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#define FIT_HASH_NODENAME "hash"
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#define FIT_ALGO_PROP "algo"
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#define FIT_VALUE_PROP "value"
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#define FIT_IGNORE_PROP "uboot-ignore"
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#define FIT_SIG_NODENAME "signature"
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#define FIT_KEY_REQUIRED "required"
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#define FIT_KEY_HINT "key-name-hint"
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/* cipher node */
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#define FIT_CIPHER_NODENAME "cipher"
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#define FIT_ALGO_PROP "algo"
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/* image node */
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#define FIT_DATA_PROP "data"
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#define FIT_DATA_POSITION_PROP "data-position"
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#define FIT_DATA_OFFSET_PROP "data-offset"
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#define FIT_DATA_SIZE_PROP "data-size"
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#define FIT_TIMESTAMP_PROP "timestamp"
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#define FIT_DESC_PROP "description"
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#define FIT_ARCH_PROP "arch"
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#define FIT_TYPE_PROP "type"
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#define FIT_OS_PROP "os"
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#define FIT_COMP_PROP "compression"
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#define FIT_ENTRY_PROP "entry"
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#define FIT_LOAD_PROP "load"
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/* configuration node */
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#define FIT_KERNEL_PROP "kernel"
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#define FIT_FILESYSTEM_PROP "filesystem"
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#define FIT_RAMDISK_PROP "ramdisk"
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#define FIT_FDT_PROP "fdt"
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#define FIT_LOADABLE_PROP "loadables"
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#define FIT_DEFAULT_PROP "default"
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#define FIT_SETUP_PROP "setup"
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#define FIT_FPGA_PROP "fpga"
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#define FIT_FIRMWARE_PROP "firmware"
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#define FIT_STANDALONE_PROP "standalone"
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#define FIT_MAX_HASH_LEN HASH_MAX_DIGEST_SIZE
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int fit_partition(struct parsed_partitions *state)
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{
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struct address_space *mapping = state->bdev->bd_inode->i_mapping;
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struct page *page = read_mapping_page(mapping, 0, NULL);
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void *fit, *init_fit;
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struct partition_meta_info *info;
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char tmp[sizeof(info->volname)];
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u64 dsize, dsectors;
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u32 size, image_pos, image_len;
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const u32 *image_offset_be, *image_len_be, *image_pos_be;
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int ret = 1, node, images, config, slot;
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const char *image_name, *image_type, *image_description, *config_default,
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*config_description, *config_loadables;
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int image_name_len, image_type_len, image_description_len, config_default_len,
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config_description_len, config_loadables_len;
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sector_t start_sect, nr_sects;
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size_t label_min;
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if (!page)
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return -ENOMEM;
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init_fit = page_address(page);
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if (!init_fit) {
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put_page(page);
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return -EFAULT;
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}
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if (fdt_check_header(init_fit)) {
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put_page(page);
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return 0;
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}
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dsectors = get_capacity(state->bdev->bd_disk);
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dsize = dsectors << SECTOR_SHIFT;
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printk(KERN_DEBUG "FIT: volume size: %llu sectors (%llu bytes)\n", dsectors, dsize);
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size = fdt_totalsize(init_fit);
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printk(KERN_DEBUG "FIT: FDT structure size: %u bytes\n", size);
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if (size > PAGE_SIZE) {
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printk(KERN_ERR "FIT: FDT structure beyond page boundaries, use 'mkimage -E ...'!\n");
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put_page(page);
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return -ENOTSUPP;
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}
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if (size >= dsize) {
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put_page(page);
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state->access_beyond_eod = (size >= dsize);
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return 0;
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}
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fit = kmemdup(init_fit, size, GFP_KERNEL);
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put_page(page);
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if (!fit)
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return -ENOMEM;
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config = fdt_path_offset(fit, FIT_CONFS_PATH);
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if (config < 0) {
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printk(KERN_ERR "FIT: Cannot find %s node: %d\n", FIT_CONFS_PATH, images);
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ret = -ENOENT;
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goto ret_out;
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}
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config_default = fdt_getprop(fit, config, FIT_DEFAULT_PROP, &config_default_len);
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if (!config_default) {
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printk(KERN_ERR "FIT: Cannot find default configuration\n");
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ret = -ENOENT;
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goto ret_out;
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}
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node = fdt_subnode_offset(fit, config, config_default);
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if (node < 0) {
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printk(KERN_ERR "FIT: Cannot find %s node: %d\n", config_default, node);
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ret = -ENOENT;
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goto ret_out;
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}
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config_description = fdt_getprop(fit, node, FIT_DESC_PROP, &config_description_len);
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config_loadables = fdt_getprop(fit, node, FIT_LOADABLE_PROP, &config_loadables_len);
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printk(KERN_DEBUG "FIT: Default configuration: %s%s%s%s\n", config_default,
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config_description?" (":"", config_description?:"", config_description?")":"");
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images = fdt_path_offset(fit, FIT_IMAGES_PATH);
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if (images < 0) {
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printk(KERN_ERR "FIT: Cannot find %s node: %d\n", FIT_IMAGES_PATH, images);
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ret = -EINVAL;
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goto ret_out;
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}
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slot = 1;
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fdt_for_each_subnode(node, fit, images) {
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image_name = fdt_get_name(fit, node, &image_name_len);
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image_type = fdt_getprop(fit, node, FIT_TYPE_PROP, &image_type_len);
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image_offset_be = fdt_getprop(fit, node, FIT_DATA_OFFSET_PROP, NULL);
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image_pos_be = fdt_getprop(fit, node, FIT_DATA_POSITION_PROP, NULL);
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image_len_be = fdt_getprop(fit, node, FIT_DATA_SIZE_PROP, NULL);
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if (!image_name || !image_type || !image_len_be)
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continue;
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image_len = be32_to_cpu(*image_len_be);
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if (!image_len)
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continue;
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if (image_offset_be)
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image_pos = be32_to_cpu(*image_offset_be) + size;
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else if (image_pos_be)
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image_pos = be32_to_cpu(*image_pos_be);
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else
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continue;
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image_description = fdt_getprop(fit, node, FIT_DESC_PROP, &image_description_len);
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printk(KERN_DEBUG "FIT: %16s sub-image 0x%08x - 0x%08x '%s' %s%s%s\n",
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image_type, image_pos, image_pos + image_len, image_name,
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image_description?"(":"", image_description?:"", image_description?") ":"");
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if (strcmp(image_type, FIT_FILESYSTEM_PROP))
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continue;
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if (image_pos & ((1 << PAGE_SHIFT)-1)) {
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printk(KERN_ERR "FIT: image %s start not aligned to page boundaries, skipping\n", image_name);
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continue;
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}
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if (image_len & ((1 << PAGE_SHIFT)-1)) {
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printk(KERN_ERR "FIT: sub-image %s end not aligned to page boundaries, skipping\n", image_name);
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continue;
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}
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start_sect = image_pos >> SECTOR_SHIFT;
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nr_sects = image_len >> SECTOR_SHIFT;
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if (start_sect + nr_sects > dsectors) {
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state->access_beyond_eod = 1;
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continue;
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}
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put_partition(state, slot, start_sect, nr_sects);
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state->parts[slot].flags = 0;
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info = &state->parts[slot].info;
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label_min = min_t(int, sizeof(info->volname) - 1, image_name_len);
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strncpy(info->volname, image_name, label_min);
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info->volname[label_min] = '\0';
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snprintf(tmp, sizeof(tmp), "(%s)", info->volname);
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strlcat(state->pp_buf, tmp, PAGE_SIZE);
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state->parts[slot].has_info = true;
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if (config_loadables && !strcmp(image_name, config_loadables)) {
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printk(KERN_DEBUG "FIT: selecting configured loadable %s to be root filesystem\n", image_name);
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state->parts[slot].flags |= ADDPART_FLAG_ROOTDEV;
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}
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++slot;
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}
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ret_out:
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kfree(fit);
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return ret;
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}
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