mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-11-28 06:04:16 +01:00
30bc03c9fa
-updated libext2fs to e2fsprogs 1.42 -updated libfat to R4883 Thanks to USB Loader GX for the new libs
636 lines
16 KiB
C
636 lines
16 KiB
C
/*
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* block.c --- iterate over all blocks in an inode
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*
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* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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struct block_context {
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ext2_filsys fs;
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int (*func)(ext2_filsys fs,
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blk64_t *blocknr,
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e2_blkcnt_t bcount,
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blk64_t ref_blk,
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int ref_offset,
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void *priv_data);
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e2_blkcnt_t bcount;
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int bsize;
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int flags;
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errcode_t errcode;
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char *ind_buf;
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char *dind_buf;
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char *tind_buf;
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void *priv_data;
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};
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#define check_for_ro_violation_return(ctx, ret) \
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do { \
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if (((ctx)->flags & BLOCK_FLAG_READ_ONLY) && \
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((ret) & BLOCK_CHANGED)) { \
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(ctx)->errcode = EXT2_ET_RO_BLOCK_ITERATE; \
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ret |= BLOCK_ABORT | BLOCK_ERROR; \
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return ret; \
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} \
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} while (0)
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#define check_for_ro_violation_goto(ctx, ret, label) \
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do { \
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if (((ctx)->flags & BLOCK_FLAG_READ_ONLY) && \
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((ret) & BLOCK_CHANGED)) { \
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(ctx)->errcode = EXT2_ET_RO_BLOCK_ITERATE; \
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ret |= BLOCK_ABORT | BLOCK_ERROR; \
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goto label; \
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} \
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} while (0)
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static int block_iterate_ind(blk_t *ind_block, blk_t ref_block,
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int ref_offset, struct block_context *ctx)
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{
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int ret = 0, changed = 0;
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int i, flags, limit, offset;
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blk_t *block_nr;
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blk64_t blk64;
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limit = ctx->fs->blocksize >> 2;
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if (!(ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
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!(ctx->flags & BLOCK_FLAG_DATA_ONLY)) {
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blk64 = *ind_block;
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ret = (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_IND, ref_block,
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ref_offset, ctx->priv_data);
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*ind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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if (!*ind_block || (ret & BLOCK_ABORT)) {
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ctx->bcount += limit;
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return ret;
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}
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if (*ind_block >= ext2fs_blocks_count(ctx->fs->super) ||
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*ind_block < ctx->fs->super->s_first_data_block) {
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ctx->errcode = EXT2_ET_BAD_IND_BLOCK;
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ret |= BLOCK_ERROR;
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return ret;
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}
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ctx->errcode = ext2fs_read_ind_block(ctx->fs, *ind_block,
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ctx->ind_buf);
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if (ctx->errcode) {
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ret |= BLOCK_ERROR;
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return ret;
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}
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block_nr = (blk_t *) ctx->ind_buf;
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offset = 0;
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if (ctx->flags & BLOCK_FLAG_APPEND) {
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for (i = 0; i < limit; i++, ctx->bcount++, block_nr++) {
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blk64 = *block_nr;
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flags = (*ctx->func)(ctx->fs, &blk64, ctx->bcount,
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*ind_block, offset,
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ctx->priv_data);
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*block_nr = blk64;
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changed |= flags;
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if (flags & BLOCK_ABORT) {
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ret |= BLOCK_ABORT;
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break;
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}
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offset += sizeof(blk_t);
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}
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} else {
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for (i = 0; i < limit; i++, ctx->bcount++, block_nr++) {
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if (*block_nr == 0)
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goto skip_sparse;
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blk64 = *block_nr;
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flags = (*ctx->func)(ctx->fs, &blk64, ctx->bcount,
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*ind_block, offset,
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ctx->priv_data);
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*block_nr = blk64;
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changed |= flags;
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if (flags & BLOCK_ABORT) {
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ret |= BLOCK_ABORT;
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break;
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}
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skip_sparse:
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offset += sizeof(blk_t);
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}
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}
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check_for_ro_violation_return(ctx, changed);
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if (changed & BLOCK_CHANGED) {
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ctx->errcode = ext2fs_write_ind_block(ctx->fs, *ind_block,
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ctx->ind_buf);
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if (ctx->errcode)
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ret |= BLOCK_ERROR | BLOCK_ABORT;
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}
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if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
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!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
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!(ret & BLOCK_ABORT)) {
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blk64 = *ind_block;
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ret |= (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_IND, ref_block,
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ref_offset, ctx->priv_data);
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*ind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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return ret;
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}
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static int block_iterate_dind(blk_t *dind_block, blk_t ref_block,
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int ref_offset, struct block_context *ctx)
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{
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int ret = 0, changed = 0;
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int i, flags, limit, offset;
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blk_t *block_nr;
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blk64_t blk64;
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limit = ctx->fs->blocksize >> 2;
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if (!(ctx->flags & (BLOCK_FLAG_DEPTH_TRAVERSE |
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BLOCK_FLAG_DATA_ONLY))) {
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blk64 = *dind_block;
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ret = (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_DIND, ref_block,
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ref_offset, ctx->priv_data);
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*dind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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if (!*dind_block || (ret & BLOCK_ABORT)) {
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ctx->bcount += limit*limit;
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return ret;
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}
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if (*dind_block >= ext2fs_blocks_count(ctx->fs->super) ||
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*dind_block < ctx->fs->super->s_first_data_block) {
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ctx->errcode = EXT2_ET_BAD_DIND_BLOCK;
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ret |= BLOCK_ERROR;
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return ret;
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}
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ctx->errcode = ext2fs_read_ind_block(ctx->fs, *dind_block,
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ctx->dind_buf);
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if (ctx->errcode) {
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ret |= BLOCK_ERROR;
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return ret;
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}
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block_nr = (blk_t *) ctx->dind_buf;
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offset = 0;
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if (ctx->flags & BLOCK_FLAG_APPEND) {
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for (i = 0; i < limit; i++, block_nr++) {
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flags = block_iterate_ind(block_nr,
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*dind_block, offset,
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ctx);
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changed |= flags;
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if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
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ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
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break;
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}
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offset += sizeof(blk_t);
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}
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} else {
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for (i = 0; i < limit; i++, block_nr++) {
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if (*block_nr == 0) {
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ctx->bcount += limit;
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continue;
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}
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flags = block_iterate_ind(block_nr,
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*dind_block, offset,
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ctx);
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changed |= flags;
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if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
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ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
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break;
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}
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offset += sizeof(blk_t);
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}
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}
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check_for_ro_violation_return(ctx, changed);
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if (changed & BLOCK_CHANGED) {
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ctx->errcode = ext2fs_write_ind_block(ctx->fs, *dind_block,
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ctx->dind_buf);
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if (ctx->errcode)
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ret |= BLOCK_ERROR | BLOCK_ABORT;
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}
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if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
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!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
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!(ret & BLOCK_ABORT)) {
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blk64 = *dind_block;
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ret |= (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_DIND, ref_block,
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ref_offset, ctx->priv_data);
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*dind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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return ret;
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}
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static int block_iterate_tind(blk_t *tind_block, blk_t ref_block,
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int ref_offset, struct block_context *ctx)
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{
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int ret = 0, changed = 0;
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int i, flags, limit, offset;
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blk_t *block_nr;
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blk64_t blk64;
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limit = ctx->fs->blocksize >> 2;
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if (!(ctx->flags & (BLOCK_FLAG_DEPTH_TRAVERSE |
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BLOCK_FLAG_DATA_ONLY))) {
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blk64 = *tind_block;
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ret = (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_TIND, ref_block,
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ref_offset, ctx->priv_data);
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*tind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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if (!*tind_block || (ret & BLOCK_ABORT)) {
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ctx->bcount += limit*limit*limit;
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return ret;
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}
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if (*tind_block >= ext2fs_blocks_count(ctx->fs->super) ||
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*tind_block < ctx->fs->super->s_first_data_block) {
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ctx->errcode = EXT2_ET_BAD_TIND_BLOCK;
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ret |= BLOCK_ERROR;
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return ret;
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}
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ctx->errcode = ext2fs_read_ind_block(ctx->fs, *tind_block,
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ctx->tind_buf);
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if (ctx->errcode) {
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ret |= BLOCK_ERROR;
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return ret;
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}
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block_nr = (blk_t *) ctx->tind_buf;
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offset = 0;
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if (ctx->flags & BLOCK_FLAG_APPEND) {
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for (i = 0; i < limit; i++, block_nr++) {
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flags = block_iterate_dind(block_nr,
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*tind_block,
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offset, ctx);
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changed |= flags;
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if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
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ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
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break;
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}
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offset += sizeof(blk_t);
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}
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} else {
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for (i = 0; i < limit; i++, block_nr++) {
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if (*block_nr == 0) {
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ctx->bcount += limit*limit;
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continue;
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}
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flags = block_iterate_dind(block_nr,
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*tind_block,
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offset, ctx);
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changed |= flags;
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if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
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ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
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break;
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}
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offset += sizeof(blk_t);
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}
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}
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check_for_ro_violation_return(ctx, changed);
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if (changed & BLOCK_CHANGED) {
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ctx->errcode = ext2fs_write_ind_block(ctx->fs, *tind_block,
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ctx->tind_buf);
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if (ctx->errcode)
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ret |= BLOCK_ERROR | BLOCK_ABORT;
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}
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if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
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!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
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!(ret & BLOCK_ABORT)) {
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blk64 = *tind_block;
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ret |= (*ctx->func)(ctx->fs, &blk64,
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BLOCK_COUNT_TIND, ref_block,
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ref_offset, ctx->priv_data);
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*tind_block = blk64;
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}
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check_for_ro_violation_return(ctx, ret);
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return ret;
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}
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errcode_t ext2fs_block_iterate3(ext2_filsys fs,
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ext2_ino_t ino,
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int flags,
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char *block_buf,
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int (*func)(ext2_filsys fs,
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blk64_t *blocknr,
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e2_blkcnt_t blockcnt,
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blk64_t ref_blk,
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int ref_offset,
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void *priv_data),
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void *priv_data)
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{
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int i;
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int r, ret = 0;
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struct ext2_inode inode;
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errcode_t retval;
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struct block_context ctx;
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int limit;
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blk64_t blk64;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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ctx.errcode = ext2fs_read_inode(fs, ino, &inode);
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if (ctx.errcode)
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return ctx.errcode;
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/*
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* Check to see if we need to limit large files
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*/
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if (flags & BLOCK_FLAG_NO_LARGE) {
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if (!LINUX_S_ISDIR(inode.i_mode) &&
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(inode.i_size_high != 0))
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return EXT2_ET_FILE_TOO_BIG;
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}
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limit = fs->blocksize >> 2;
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ctx.fs = fs;
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ctx.func = func;
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ctx.priv_data = priv_data;
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ctx.flags = flags;
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ctx.bcount = 0;
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if (block_buf) {
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ctx.ind_buf = block_buf;
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} else {
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retval = ext2fs_get_array(3, fs->blocksize, &ctx.ind_buf);
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if (retval)
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return retval;
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}
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ctx.dind_buf = ctx.ind_buf + fs->blocksize;
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ctx.tind_buf = ctx.dind_buf + fs->blocksize;
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/*
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* Iterate over the HURD translator block (if present)
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*/
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if ((fs->super->s_creator_os == EXT2_OS_HURD) &&
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!(flags & BLOCK_FLAG_DATA_ONLY)) {
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if (inode.osd1.hurd1.h_i_translator) {
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blk64 = inode.osd1.hurd1.h_i_translator;
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ret |= (*ctx.func)(fs, &blk64,
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BLOCK_COUNT_TRANSLATOR,
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0, 0, priv_data);
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inode.osd1.hurd1.h_i_translator = (blk_t) blk64;
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if (ret & BLOCK_ABORT)
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goto abort_exit;
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check_for_ro_violation_goto(&ctx, ret, abort_exit);
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}
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}
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if (inode.i_flags & EXT4_EXTENTS_FL) {
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ext2_extent_handle_t handle;
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struct ext2fs_extent extent;
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e2_blkcnt_t blockcnt = 0;
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blk64_t blk, new_blk;
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int op = EXT2_EXTENT_ROOT;
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int uninit;
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unsigned int j;
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ctx.errcode = ext2fs_extent_open2(fs, ino, &inode, &handle);
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if (ctx.errcode)
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goto abort_exit;
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while (1) {
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ctx.errcode = ext2fs_extent_get(handle, op, &extent);
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if (ctx.errcode) {
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if (ctx.errcode != EXT2_ET_EXTENT_NO_NEXT)
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break;
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ctx.errcode = 0;
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if (!(flags & BLOCK_FLAG_APPEND))
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break;
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next_block_set:
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blk = 0;
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r = (*ctx.func)(fs, &blk, blockcnt,
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0, 0, priv_data);
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ret |= r;
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check_for_ro_violation_goto(&ctx, ret,
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extent_errout);
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if (r & BLOCK_CHANGED) {
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ctx.errcode =
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ext2fs_extent_set_bmap(handle,
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(blk64_t) blockcnt++,
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(blk64_t) blk, 0);
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if (ctx.errcode || (ret & BLOCK_ABORT))
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break;
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if (blk)
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goto next_block_set;
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}
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break;
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}
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op = EXT2_EXTENT_NEXT;
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blk = extent.e_pblk;
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if (!(extent.e_flags & EXT2_EXTENT_FLAGS_LEAF)) {
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if (ctx.flags & BLOCK_FLAG_DATA_ONLY)
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continue;
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if ((!(extent.e_flags &
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EXT2_EXTENT_FLAGS_SECOND_VISIT) &&
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!(ctx.flags & BLOCK_FLAG_DEPTH_TRAVERSE)) ||
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((extent.e_flags &
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EXT2_EXTENT_FLAGS_SECOND_VISIT) &&
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(ctx.flags & BLOCK_FLAG_DEPTH_TRAVERSE))) {
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ret |= (*ctx.func)(fs, &blk,
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-1, 0, 0, priv_data);
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if (ret & BLOCK_CHANGED) {
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extent.e_pblk = blk;
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ctx.errcode =
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ext2fs_extent_replace(handle, 0, &extent);
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if (ctx.errcode)
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break;
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}
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}
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continue;
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}
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uninit = 0;
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if (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
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uninit = EXT2_EXTENT_SET_BMAP_UNINIT;
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#if 0
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printf("lblk %llu pblk %llu len %d blockcnt %llu\n",
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extent.e_lblk, extent.e_pblk,
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extent.e_len, blockcnt);
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#endif
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if (extent.e_lblk + extent.e_len <= blockcnt)
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continue;
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if (extent.e_lblk > blockcnt)
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blockcnt = extent.e_lblk;
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j = blockcnt - extent.e_lblk;
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blk += j;
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for (blockcnt = extent.e_lblk, j = 0;
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j < extent.e_len;
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blk++, blockcnt++, j++) {
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new_blk = blk;
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r = (*ctx.func)(fs, &new_blk, blockcnt,
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0, 0, priv_data);
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ret |= r;
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check_for_ro_violation_goto(&ctx, ret,
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extent_errout);
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if (r & BLOCK_CHANGED) {
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ctx.errcode =
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ext2fs_extent_set_bmap(handle,
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(blk64_t) blockcnt,
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new_blk, uninit);
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if (ctx.errcode)
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goto extent_errout;
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}
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if (ret & BLOCK_ABORT)
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break;
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}
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}
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extent_errout:
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ext2fs_extent_free(handle);
|
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ret |= BLOCK_ERROR | BLOCK_ABORT;
|
|
goto errout;
|
|
}
|
|
|
|
/*
|
|
* Iterate over normal data blocks
|
|
*/
|
|
for (i = 0; i < EXT2_NDIR_BLOCKS ; i++, ctx.bcount++) {
|
|
if (inode.i_block[i] || (flags & BLOCK_FLAG_APPEND)) {
|
|
blk64 = inode.i_block[i];
|
|
ret |= (*ctx.func)(fs, &blk64, ctx.bcount, 0, i,
|
|
priv_data);
|
|
inode.i_block[i] = (blk_t) blk64;
|
|
if (ret & BLOCK_ABORT)
|
|
goto abort_exit;
|
|
}
|
|
}
|
|
check_for_ro_violation_goto(&ctx, ret, abort_exit);
|
|
if (inode.i_block[EXT2_IND_BLOCK] || (flags & BLOCK_FLAG_APPEND)) {
|
|
ret |= block_iterate_ind(&inode.i_block[EXT2_IND_BLOCK],
|
|
0, EXT2_IND_BLOCK, &ctx);
|
|
if (ret & BLOCK_ABORT)
|
|
goto abort_exit;
|
|
} else
|
|
ctx.bcount += limit;
|
|
if (inode.i_block[EXT2_DIND_BLOCK] || (flags & BLOCK_FLAG_APPEND)) {
|
|
ret |= block_iterate_dind(&inode.i_block[EXT2_DIND_BLOCK],
|
|
0, EXT2_DIND_BLOCK, &ctx);
|
|
if (ret & BLOCK_ABORT)
|
|
goto abort_exit;
|
|
} else
|
|
ctx.bcount += limit * limit;
|
|
if (inode.i_block[EXT2_TIND_BLOCK] || (flags & BLOCK_FLAG_APPEND)) {
|
|
ret |= block_iterate_tind(&inode.i_block[EXT2_TIND_BLOCK],
|
|
0, EXT2_TIND_BLOCK, &ctx);
|
|
if (ret & BLOCK_ABORT)
|
|
goto abort_exit;
|
|
}
|
|
|
|
abort_exit:
|
|
if (ret & BLOCK_CHANGED) {
|
|
retval = ext2fs_write_inode(fs, ino, &inode);
|
|
if (retval) {
|
|
ret |= BLOCK_ERROR;
|
|
ctx.errcode = retval;
|
|
}
|
|
}
|
|
errout:
|
|
if (!block_buf)
|
|
ext2fs_free_mem(&ctx.ind_buf);
|
|
|
|
return (ret & BLOCK_ERROR) ? ctx.errcode : 0;
|
|
}
|
|
|
|
/*
|
|
* Emulate the old ext2fs_block_iterate function!
|
|
*/
|
|
|
|
struct xlate64 {
|
|
int (*func)(ext2_filsys fs,
|
|
blk_t *blocknr,
|
|
e2_blkcnt_t blockcnt,
|
|
blk_t ref_blk,
|
|
int ref_offset,
|
|
void *priv_data);
|
|
void *real_private;
|
|
};
|
|
|
|
static int xlate64_func(ext2_filsys fs, blk64_t *blocknr,
|
|
e2_blkcnt_t blockcnt, blk64_t ref_blk,
|
|
int ref_offset, void *priv_data)
|
|
{
|
|
struct xlate64 *xl = (struct xlate64 *) priv_data;
|
|
int ret;
|
|
blk_t block32 = *blocknr;
|
|
|
|
ret = (*xl->func)(fs, &block32, blockcnt, (blk_t) ref_blk, ref_offset,
|
|
xl->real_private);
|
|
*blocknr = block32;
|
|
return ret;
|
|
}
|
|
|
|
errcode_t ext2fs_block_iterate2(ext2_filsys fs,
|
|
ext2_ino_t ino,
|
|
int flags,
|
|
char *block_buf,
|
|
int (*func)(ext2_filsys fs,
|
|
blk_t *blocknr,
|
|
e2_blkcnt_t blockcnt,
|
|
blk_t ref_blk,
|
|
int ref_offset,
|
|
void *priv_data),
|
|
void *priv_data)
|
|
{
|
|
struct xlate64 xl;
|
|
|
|
xl.real_private = priv_data;
|
|
xl.func = func;
|
|
|
|
return ext2fs_block_iterate3(fs, ino, flags, block_buf,
|
|
xlate64_func, &xl);
|
|
}
|
|
|
|
|
|
struct xlate {
|
|
int (*func)(ext2_filsys fs,
|
|
blk_t *blocknr,
|
|
int bcount,
|
|
void *priv_data);
|
|
void *real_private;
|
|
};
|
|
|
|
#ifdef __TURBOC__
|
|
#pragma argsused
|
|
#endif
|
|
static int xlate_func(ext2_filsys fs, blk_t *blocknr, e2_blkcnt_t blockcnt,
|
|
blk_t ref_block EXT2FS_ATTR((unused)),
|
|
int ref_offset EXT2FS_ATTR((unused)),
|
|
void *priv_data)
|
|
{
|
|
struct xlate *xl = (struct xlate *) priv_data;
|
|
|
|
return (*xl->func)(fs, blocknr, (int) blockcnt, xl->real_private);
|
|
}
|
|
|
|
errcode_t ext2fs_block_iterate(ext2_filsys fs,
|
|
ext2_ino_t ino,
|
|
int flags,
|
|
char *block_buf,
|
|
int (*func)(ext2_filsys fs,
|
|
blk_t *blocknr,
|
|
int blockcnt,
|
|
void *priv_data),
|
|
void *priv_data)
|
|
{
|
|
struct xlate xl;
|
|
|
|
xl.real_private = priv_data;
|
|
xl.func = func;
|
|
|
|
return ext2fs_block_iterate2(fs, ino, BLOCK_FLAG_NO_LARGE | flags,
|
|
block_buf, xlate_func, &xl);
|
|
}
|
|
|