diff options
Diffstat (limited to 'qemu/roms/u-boot/fs/ext4/ext4fs.c')
| -rw-r--r-- | qemu/roms/u-boot/fs/ext4/ext4fs.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/qemu/roms/u-boot/fs/ext4/ext4fs.c b/qemu/roms/u-boot/fs/ext4/ext4fs.c deleted file mode 100644 index 417ce7b63..000000000 --- a/qemu/roms/u-boot/fs/ext4/ext4fs.c +++ /dev/null @@ -1,228 +0,0 @@ -/* - * (C) Copyright 2011 - 2012 Samsung Electronics - * EXT4 filesystem implementation in Uboot by - * Uma Shankar <uma.shankar@samsung.com> - * Manjunatha C Achar <a.manjunatha@samsung.com> - * - * ext4ls and ext4load : Based on ext2 ls and load support in Uboot. - * Ext4 read optimization taken from Open-Moko - * Qi bootloader - * - * (C) Copyright 2004 - * esd gmbh <www.esd-electronics.com> - * Reinhard Arlt <reinhard.arlt@esd-electronics.com> - * - * based on code from grub2 fs/ext2.c and fs/fshelp.c by - * GRUB -- GRand Unified Bootloader - * Copyright (C) 2003, 2004 Free Software Foundation, Inc. - * - * ext4write : Based on generic ext4 protocol. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <ext_common.h> -#include <ext4fs.h> -#include "ext4_common.h" - -int ext4fs_symlinknest; -struct ext_filesystem ext_fs; - -struct ext_filesystem *get_fs(void) -{ - return &ext_fs; -} - -void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot) -{ - if ((node != &ext4fs_root->diropen) && (node != currroot)) - free(node); -} - -/* - * Taken from openmoko-kernel mailing list: By Andy green - * Optimized read file API : collects and defers contiguous sector - * reads into one potentially more efficient larger sequential read action - */ -int ext4fs_read_file(struct ext2fs_node *node, int pos, - unsigned int len, char *buf) -{ - struct ext_filesystem *fs = get_fs(); - int i; - lbaint_t blockcnt; - int log2blksz = fs->dev_desc->log2blksz; - int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz; - int blocksize = (1 << (log2_fs_blocksize + log2blksz)); - unsigned int filesize = __le32_to_cpu(node->inode.size); - lbaint_t previous_block_number = -1; - lbaint_t delayed_start = 0; - lbaint_t delayed_extent = 0; - lbaint_t delayed_skipfirst = 0; - lbaint_t delayed_next = 0; - char *delayed_buf = NULL; - short status; - - /* Adjust len so it we can't read past the end of the file. */ - if (len > filesize) - len = filesize; - - blockcnt = ((len + pos) + blocksize - 1) / blocksize; - - for (i = pos / blocksize; i < blockcnt; i++) { - lbaint_t blknr; - int blockoff = pos % blocksize; - int blockend = blocksize; - int skipfirst = 0; - blknr = read_allocated_block(&(node->inode), i); - if (blknr < 0) - return -1; - - blknr = blknr << log2_fs_blocksize; - - /* Last block. */ - if (i == blockcnt - 1) { - blockend = (len + pos) % blocksize; - - /* The last portion is exactly blocksize. */ - if (!blockend) - blockend = blocksize; - } - - /* First block. */ - if (i == pos / blocksize) { - skipfirst = blockoff; - blockend -= skipfirst; - } - if (blknr) { - int status; - - if (previous_block_number != -1) { - if (delayed_next == blknr) { - delayed_extent += blockend; - delayed_next += blockend >> log2blksz; - } else { /* spill */ - status = ext4fs_devread(delayed_start, - delayed_skipfirst, - delayed_extent, - delayed_buf); - if (status == 0) - return -1; - previous_block_number = blknr; - delayed_start = blknr; - delayed_extent = blockend; - delayed_skipfirst = skipfirst; - delayed_buf = buf; - delayed_next = blknr + - (blockend >> log2blksz); - } - } else { - previous_block_number = blknr; - delayed_start = blknr; - delayed_extent = blockend; - delayed_skipfirst = skipfirst; - delayed_buf = buf; - delayed_next = blknr + - (blockend >> log2blksz); - } - } else { - if (previous_block_number != -1) { - /* spill */ - status = ext4fs_devread(delayed_start, - delayed_skipfirst, - delayed_extent, - delayed_buf); - if (status == 0) - return -1; - previous_block_number = -1; - } - memset(buf, 0, blocksize - skipfirst); - } - buf += blocksize - skipfirst; - } - if (previous_block_number != -1) { - /* spill */ - status = ext4fs_devread(delayed_start, - delayed_skipfirst, delayed_extent, - delayed_buf); - if (status == 0) - return -1; - previous_block_number = -1; - } - - return len; -} - -int ext4fs_ls(const char *dirname) -{ - struct ext2fs_node *dirnode; - int status; - - if (dirname == NULL) - return 0; - - status = ext4fs_find_file(dirname, &ext4fs_root->diropen, &dirnode, - FILETYPE_DIRECTORY); - if (status != 1) { - printf("** Can not find directory. **\n"); - return 1; - } - - ext4fs_iterate_dir(dirnode, NULL, NULL, NULL); - ext4fs_free_node(dirnode, &ext4fs_root->diropen); - - return 0; -} - -int ext4fs_exists(const char *filename) -{ - int file_len; - - file_len = ext4fs_open(filename); - return file_len >= 0; -} - -int ext4fs_read(char *buf, unsigned len) -{ - if (ext4fs_root == NULL || ext4fs_file == NULL) - return 0; - - return ext4fs_read_file(ext4fs_file, 0, len, buf); -} - -int ext4fs_probe(block_dev_desc_t *fs_dev_desc, - disk_partition_t *fs_partition) -{ - ext4fs_set_blk_dev(fs_dev_desc, fs_partition); - - if (!ext4fs_mount(fs_partition->size)) { - ext4fs_close(); - return -1; - } - - return 0; -} - -int ext4_read_file(const char *filename, void *buf, int offset, int len) -{ - int file_len; - int len_read; - - if (offset != 0) { - printf("** Cannot support non-zero offset **\n"); - return -1; - } - - file_len = ext4fs_open(filename); - if (file_len < 0) { - printf("** File not found %s **\n", filename); - return -1; - } - - if (len == 0) - len = file_len; - - len_read = ext4fs_read(buf, len); - - return len_read; -} |