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Diffstat (limited to 'e2fsprogs/ext2fs/block.c')
-rw-r--r--e2fsprogs/ext2fs/block.c438
1 files changed, 0 insertions, 438 deletions
diff --git a/e2fsprogs/ext2fs/block.c b/e2fsprogs/ext2fs/block.c
deleted file mode 100644
index 0a757b2..0000000
--- a/e2fsprogs/ext2fs/block.c
+++ /dev/null
@@ -1,438 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * block.c --- iterate over all blocks in an inode
- *
- * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
- *
- * %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
- * %End-Header%
- */
-
-#include <stdio.h>
-#include <string.h>
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include "ext2_fs.h"
-#include "ext2fs.h"
-
-struct block_context {
- ext2_filsys fs;
- int (*func)(ext2_filsys fs,
- blk_t *blocknr,
- e2_blkcnt_t bcount,
- blk_t ref_blk,
- int ref_offset,
- void *priv_data);
- e2_blkcnt_t bcount;
- int bsize;
- int flags;
- errcode_t errcode;
- char *ind_buf;
- char *dind_buf;
- char *tind_buf;
- void *priv_data;
-};
-
-static int block_iterate_ind(blk_t *ind_block, blk_t ref_block,
- int ref_offset, struct block_context *ctx)
-{
- int ret = 0, changed = 0;
- int i, flags, limit, offset;
- blk_t *block_nr;
-
- limit = ctx->fs->blocksize >> 2;
- if (!(ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY))
- ret = (*ctx->func)(ctx->fs, ind_block,
- BLOCK_COUNT_IND, ref_block,
- ref_offset, ctx->priv_data);
- if (!*ind_block || (ret & BLOCK_ABORT)) {
- ctx->bcount += limit;
- return ret;
- }
- if (*ind_block >= ctx->fs->super->s_blocks_count ||
- *ind_block < ctx->fs->super->s_first_data_block) {
- ctx->errcode = EXT2_ET_BAD_IND_BLOCK;
- ret |= BLOCK_ERROR;
- return ret;
- }
- ctx->errcode = ext2fs_read_ind_block(ctx->fs, *ind_block,
- ctx->ind_buf);
- if (ctx->errcode) {
- ret |= BLOCK_ERROR;
- return ret;
- }
-
- block_nr = (blk_t *) ctx->ind_buf;
- offset = 0;
- if (ctx->flags & BLOCK_FLAG_APPEND) {
- for (i = 0; i < limit; i++, ctx->bcount++, block_nr++) {
- flags = (*ctx->func)(ctx->fs, block_nr, ctx->bcount,
- *ind_block, offset,
- ctx->priv_data);
- changed |= flags;
- if (flags & BLOCK_ABORT) {
- ret |= BLOCK_ABORT;
- break;
- }
- offset += sizeof(blk_t);
- }
- } else {
- for (i = 0; i < limit; i++, ctx->bcount++, block_nr++) {
- if (*block_nr == 0)
- continue;
- flags = (*ctx->func)(ctx->fs, block_nr, ctx->bcount,
- *ind_block, offset,
- ctx->priv_data);
- changed |= flags;
- if (flags & BLOCK_ABORT) {
- ret |= BLOCK_ABORT;
- break;
- }
- offset += sizeof(blk_t);
- }
- }
- if (changed & BLOCK_CHANGED) {
- ctx->errcode = ext2fs_write_ind_block(ctx->fs, *ind_block,
- ctx->ind_buf);
- if (ctx->errcode)
- ret |= BLOCK_ERROR | BLOCK_ABORT;
- }
- if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
- !(ret & BLOCK_ABORT))
- ret |= (*ctx->func)(ctx->fs, ind_block,
- BLOCK_COUNT_IND, ref_block,
- ref_offset, ctx->priv_data);
- return ret;
-}
-
-static int block_iterate_dind(blk_t *dind_block, blk_t ref_block,
- int ref_offset, struct block_context *ctx)
-{
- int ret = 0, changed = 0;
- int i, flags, limit, offset;
- blk_t *block_nr;
-
- limit = ctx->fs->blocksize >> 2;
- if (!(ctx->flags & (BLOCK_FLAG_DEPTH_TRAVERSE |
- BLOCK_FLAG_DATA_ONLY)))
- ret = (*ctx->func)(ctx->fs, dind_block,
- BLOCK_COUNT_DIND, ref_block,
- ref_offset, ctx->priv_data);
- if (!*dind_block || (ret & BLOCK_ABORT)) {
- ctx->bcount += limit*limit;
- return ret;
- }
- if (*dind_block >= ctx->fs->super->s_blocks_count ||
- *dind_block < ctx->fs->super->s_first_data_block) {
- ctx->errcode = EXT2_ET_BAD_DIND_BLOCK;
- ret |= BLOCK_ERROR;
- return ret;
- }
- ctx->errcode = ext2fs_read_ind_block(ctx->fs, *dind_block,
- ctx->dind_buf);
- if (ctx->errcode) {
- ret |= BLOCK_ERROR;
- return ret;
- }
-
- block_nr = (blk_t *) ctx->dind_buf;
- offset = 0;
- if (ctx->flags & BLOCK_FLAG_APPEND) {
- for (i = 0; i < limit; i++, block_nr++) {
- flags = block_iterate_ind(block_nr,
- *dind_block, offset,
- ctx);
- changed |= flags;
- if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
- ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
- break;
- }
- offset += sizeof(blk_t);
- }
- } else {
- for (i = 0; i < limit; i++, block_nr++) {
- if (*block_nr == 0) {
- ctx->bcount += limit;
- continue;
- }
- flags = block_iterate_ind(block_nr,
- *dind_block, offset,
- ctx);
- changed |= flags;
- if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
- ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
- break;
- }
- offset += sizeof(blk_t);
- }
- }
- if (changed & BLOCK_CHANGED) {
- ctx->errcode = ext2fs_write_ind_block(ctx->fs, *dind_block,
- ctx->dind_buf);
- if (ctx->errcode)
- ret |= BLOCK_ERROR | BLOCK_ABORT;
- }
- if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
- !(ret & BLOCK_ABORT))
- ret |= (*ctx->func)(ctx->fs, dind_block,
- BLOCK_COUNT_DIND, ref_block,
- ref_offset, ctx->priv_data);
- return ret;
-}
-
-static int block_iterate_tind(blk_t *tind_block, blk_t ref_block,
- int ref_offset, struct block_context *ctx)
-{
- int ret = 0, changed = 0;
- int i, flags, limit, offset;
- blk_t *block_nr;
-
- limit = ctx->fs->blocksize >> 2;
- if (!(ctx->flags & (BLOCK_FLAG_DEPTH_TRAVERSE |
- BLOCK_FLAG_DATA_ONLY)))
- ret = (*ctx->func)(ctx->fs, tind_block,
- BLOCK_COUNT_TIND, ref_block,
- ref_offset, ctx->priv_data);
- if (!*tind_block || (ret & BLOCK_ABORT)) {
- ctx->bcount += limit*limit*limit;
- return ret;
- }
- if (*tind_block >= ctx->fs->super->s_blocks_count ||
- *tind_block < ctx->fs->super->s_first_data_block) {
- ctx->errcode = EXT2_ET_BAD_TIND_BLOCK;
- ret |= BLOCK_ERROR;
- return ret;
- }
- ctx->errcode = ext2fs_read_ind_block(ctx->fs, *tind_block,
- ctx->tind_buf);
- if (ctx->errcode) {
- ret |= BLOCK_ERROR;
- return ret;
- }
-
- block_nr = (blk_t *) ctx->tind_buf;
- offset = 0;
- if (ctx->flags & BLOCK_FLAG_APPEND) {
- for (i = 0; i < limit; i++, block_nr++) {
- flags = block_iterate_dind(block_nr,
- *tind_block,
- offset, ctx);
- changed |= flags;
- if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
- ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
- break;
- }
- offset += sizeof(blk_t);
- }
- } else {
- for (i = 0; i < limit; i++, block_nr++) {
- if (*block_nr == 0) {
- ctx->bcount += limit*limit;
- continue;
- }
- flags = block_iterate_dind(block_nr,
- *tind_block,
- offset, ctx);
- changed |= flags;
- if (flags & (BLOCK_ABORT | BLOCK_ERROR)) {
- ret |= flags & (BLOCK_ABORT | BLOCK_ERROR);
- break;
- }
- offset += sizeof(blk_t);
- }
- }
- if (changed & BLOCK_CHANGED) {
- ctx->errcode = ext2fs_write_ind_block(ctx->fs, *tind_block,
- ctx->tind_buf);
- if (ctx->errcode)
- ret |= BLOCK_ERROR | BLOCK_ABORT;
- }
- if ((ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
- !(ret & BLOCK_ABORT))
- ret |= (*ctx->func)(ctx->fs, tind_block,
- BLOCK_COUNT_TIND, ref_block,
- ref_offset, ctx->priv_data);
-
- 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)
-{
- int i;
- int got_inode = 0;
- int ret = 0;
- blk_t blocks[EXT2_N_BLOCKS]; /* directory data blocks */
- struct ext2_inode inode;
- errcode_t retval;
- struct block_context ctx;
- int limit;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- /*
- * Check to see if we need to limit large files
- */
- if (flags & BLOCK_FLAG_NO_LARGE) {
- ctx.errcode = ext2fs_read_inode(fs, ino, &inode);
- if (ctx.errcode)
- return ctx.errcode;
- got_inode = 1;
- if (!LINUX_S_ISDIR(inode.i_mode) &&
- (inode.i_size_high != 0))
- return EXT2_ET_FILE_TOO_BIG;
- }
-
- retval = ext2fs_get_blocks(fs, ino, blocks);
- if (retval)
- return retval;
-
- limit = fs->blocksize >> 2;
-
- ctx.fs = fs;
- ctx.func = func;
- ctx.priv_data = priv_data;
- ctx.flags = flags;
- ctx.bcount = 0;
- if (block_buf) {
- ctx.ind_buf = block_buf;
- } else {
- retval = ext2fs_get_mem(fs->blocksize * 3, &ctx.ind_buf);
- if (retval)
- return retval;
- }
- ctx.dind_buf = ctx.ind_buf + fs->blocksize;
- ctx.tind_buf = ctx.dind_buf + fs->blocksize;
-
- /*
- * Iterate over the HURD translator block (if present)
- */
- if ((fs->super->s_creator_os == EXT2_OS_HURD) &&
- !(flags & BLOCK_FLAG_DATA_ONLY)) {
- ctx.errcode = ext2fs_read_inode(fs, ino, &inode);
- if (ctx.errcode)
- goto abort_exit;
- got_inode = 1;
- if (inode.osd1.hurd1.h_i_translator) {
- ret |= (*ctx.func)(fs,
- &inode.osd1.hurd1.h_i_translator,
- BLOCK_COUNT_TRANSLATOR,
- 0, 0, priv_data);
- if (ret & BLOCK_ABORT)
- goto abort_exit;
- }
- }
-
- /*
- * Iterate over normal data blocks
- */
- for (i = 0; i < EXT2_NDIR_BLOCKS ; i++, ctx.bcount++) {
- if (blocks[i] || (flags & BLOCK_FLAG_APPEND)) {
- ret |= (*ctx.func)(fs, &blocks[i],
- ctx.bcount, 0, i, priv_data);
- if (ret & BLOCK_ABORT)
- goto abort_exit;
- }
- }
- if (*(blocks + EXT2_IND_BLOCK) || (flags & BLOCK_FLAG_APPEND)) {
- ret |= block_iterate_ind(blocks + EXT2_IND_BLOCK,
- 0, EXT2_IND_BLOCK, &ctx);
- if (ret & BLOCK_ABORT)
- goto abort_exit;
- } else
- ctx.bcount += limit;
- if (*(blocks + EXT2_DIND_BLOCK) || (flags & BLOCK_FLAG_APPEND)) {
- ret |= block_iterate_dind(blocks + EXT2_DIND_BLOCK,
- 0, EXT2_DIND_BLOCK, &ctx);
- if (ret & BLOCK_ABORT)
- goto abort_exit;
- } else
- ctx.bcount += limit * limit;
- if (*(blocks + EXT2_TIND_BLOCK) || (flags & BLOCK_FLAG_APPEND)) {
- ret |= block_iterate_tind(blocks + EXT2_TIND_BLOCK,
- 0, EXT2_TIND_BLOCK, &ctx);
- if (ret & BLOCK_ABORT)
- goto abort_exit;
- }
-
-abort_exit:
- if (ret & BLOCK_CHANGED) {
- if (!got_inode) {
- retval = ext2fs_read_inode(fs, ino, &inode);
- if (retval)
- return retval;
- }
- for (i=0; i < EXT2_N_BLOCKS; i++)
- inode.i_block[i] = blocks[i];
- retval = ext2fs_write_inode(fs, ino, &inode);
- if (retval)
- return retval;
- }
-
- if (!block_buf)
- ext2fs_free_mem(&ctx.ind_buf);
-
- return (ret & BLOCK_ERROR) ? ctx.errcode : 0;
-}
-
-/*
- * Emulate the old ext2fs_block_iterate function!
- */
-
-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);
-}
-
generated by cgit v1.1 at 2024-11-07 07:29:39 +0000