/*
* block.c --- iterate over all blocks in an inode
*
- * Copyright (C) 1993 Theodore Ts'o. This file may be redistributed
- * under the terms of the GNU Public License.
+ * 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>
-#include <stdlib.h>
-#if HAVE_ERRNO_H
-#include <errno.h>
#endif
-#include <linux/ext2_fs.h>
-
+#include "ext2_fs.h"
#include "ext2fs.h"
struct block_context {
ext2_filsys fs;
int (*func)(ext2_filsys fs,
blk_t *blocknr,
- int bcount,
- void *private);
- int bcount;
+ 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 *private;
+ void *priv_data;
};
-static int block_iterate_ind(blk_t *ind_block, struct block_context *ctx)
+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;
+ 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, ctx->private);
- if (!*ind_block || (ret & BLOCK_ABORT))
+ 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 = io_channel_read_blk(ctx->fs->io, *ind_block,
- 1, ctx->ind_buf);
+ if ((ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (ctx->fs->io != ctx->fs->image_io)) {
+ ctx->errcode = 0;
+ memset(ctx->ind_buf, 0, ctx->fs->blocksize);
+ } else
+ ctx->errcode = io_channel_read_blk(ctx->fs->io, *ind_block,
+ 1, ctx->ind_buf);
if (ctx->errcode) {
ret |= BLOCK_ERROR;
return ret;
}
- limit = ctx->fs->blocksize >> 2;
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_READ)) {
block_nr = (blk_t *) ctx->ind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
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,
- ctx->private);
+ *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,
- ctx->private);
+ *ind_block, offset,
+ ctx->priv_data);
changed |= flags;
if (flags & BLOCK_ABORT) {
ret |= BLOCK_ABORT;
break;
}
+ offset += sizeof(blk_t);
}
}
- if (changed & BLOCK_CHANGED) {
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) {
+ if (!(ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (changed & BLOCK_CHANGED)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_WRITE)) {
block_nr = (blk_t *) ctx->ind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
ctx->errcode = io_channel_write_blk(ctx->fs->io, *ind_block,
1, ctx->ind_buf);
if (ctx->errcode)
!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
!(ret & BLOCK_ABORT))
ret |= (*ctx->func)(ctx->fs, ind_block,
- BLOCK_COUNT_IND, ctx->private);
+ BLOCK_COUNT_IND, ref_block,
+ ref_offset, ctx->priv_data);
return ret;
}
-static int block_iterate_dind(blk_t *dind_block, struct block_context *ctx)
+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;
+ int i, flags, limit, offset;
blk_t *block_nr;
- if (!(ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY))
+ 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, ctx->private);
- if (!*dind_block || (ret & BLOCK_ABORT))
+ 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 = io_channel_read_blk(ctx->fs->io, *dind_block,
- 1, ctx->dind_buf);
+ if ((ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (ctx->fs->io != ctx->fs->image_io)) {
+ ctx->errcode = 0;
+ memset(ctx->dind_buf, 0, ctx->fs->blocksize);
+ } else
+ ctx->errcode = io_channel_read_blk(ctx->fs->io, *dind_block,
+ 1, ctx->dind_buf);
if (ctx->errcode) {
ret |= BLOCK_ERROR;
return ret;
}
- limit = ctx->fs->blocksize >> 2;
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_READ)) {
block_nr = (blk_t *) ctx->dind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
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, ctx);
+ 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)
+ if (*block_nr == 0) {
+ ctx->bcount += limit;
continue;
- flags = block_iterate_ind(block_nr, ctx);
+ }
+ 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) {
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) {
+ if (!(ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (changed & BLOCK_CHANGED)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_WRITE)) {
block_nr = (blk_t *) ctx->dind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
ctx->errcode = io_channel_write_blk(ctx->fs->io, *dind_block,
1, ctx->dind_buf);
if (ctx->errcode)
!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
!(ret & BLOCK_ABORT))
ret |= (*ctx->func)(ctx->fs, dind_block,
- BLOCK_COUNT_DIND, ctx->private);
+ BLOCK_COUNT_DIND, ref_block,
+ ref_offset, ctx->priv_data);
return ret;
}
-static int block_iterate_tind(blk_t *tind_block, struct block_context *ctx)
+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;
+ int i, flags, limit, offset;
blk_t *block_nr;
- if (!(ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&
- !(ctx->flags & BLOCK_FLAG_DATA_ONLY))
+ 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, ctx->private);
- if (!*tind_block || (ret & BLOCK_ABORT))
+ 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 = io_channel_read_blk(ctx->fs->io, *tind_block,
- 1, ctx->tind_buf);
+ if ((ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (ctx->fs->io != ctx->fs->image_io)) {
+ ctx->errcode = 0;
+ memset(ctx->tind_buf, 0, ctx->fs->blocksize);
+ } else
+ ctx->errcode = io_channel_read_blk(ctx->fs->io, *tind_block,
+ 1, ctx->tind_buf);
if (ctx->errcode) {
ret |= BLOCK_ERROR;
return ret;
}
- limit = ctx->fs->blocksize >> 2;
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_READ)) {
block_nr = (blk_t *) ctx->tind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
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, ctx);
+ 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)
+ if (*block_nr == 0) {
+ ctx->bcount += limit*limit;
continue;
- flags = block_iterate_dind(block_nr, ctx);
+ }
+ 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) {
- if ((ctx->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (ctx->fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) {
+ if (!(ctx->fs->flags & EXT2_FLAG_IMAGE_FILE) &&
+ (changed & BLOCK_CHANGED)) {
+#ifdef EXT2FS_ENABLE_SWAPFS
+ if (ctx->fs->flags & (EXT2_FLAG_SWAP_BYTES |
+ EXT2_FLAG_SWAP_BYTES_WRITE)) {
block_nr = (blk_t *) ctx->tind_buf;
for (i = 0; i < limit; i++, block_nr++)
*block_nr = ext2fs_swab32(*block_nr);
}
+#endif
ctx->errcode = io_channel_write_blk(ctx->fs->io, *tind_block,
1, ctx->tind_buf);
if (ctx->errcode)
!(ctx->flags & BLOCK_FLAG_DATA_ONLY) &&
!(ret & BLOCK_ABORT))
ret |= (*ctx->func)(ctx->fs, tind_block,
- BLOCK_COUNT_TIND, ctx->private);
+ BLOCK_COUNT_TIND, ref_block,
+ ref_offset, ctx->priv_data);
return ret;
}
-errcode_t ext2fs_block_iterate(ext2_filsys fs,
- ino_t ino,
- int flags,
- char *block_buf,
- int (*func)(ext2_filsys fs,
- blk_t *blocknr,
- int blockcnt,
- void *private),
- void *private)
+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;
- struct block_context ctx;
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);
- ret = ext2fs_get_blocks(fs, ino, blocks);
- if (ret)
- return ret;
+ /*
+ * 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.private = private;
- ctx.bcount = 0;
+ ctx.priv_data = priv_data;
ctx.flags = flags;
+ ctx.bcount = 0;
if (block_buf) {
ctx.ind_buf = block_buf;
} else {
- ctx.ind_buf = malloc(fs->blocksize * 3);
- if (!ctx.ind_buf)
- return ENOMEM;
+ 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;
!(flags & BLOCK_FLAG_DATA_ONLY)) {
ctx.errcode = ext2fs_read_inode(fs, ino, &inode);
if (ctx.errcode)
- goto abort;
+ goto abort_exit;
got_inode = 1;
if (inode.osd1.hurd1.h_i_translator) {
- ret |= (*func)(fs, &inode.osd1.hurd1.h_i_translator,
- BLOCK_COUNT_TRANSLATOR, private);
+ ret |= (*ctx.func)(fs,
+ &inode.osd1.hurd1.h_i_translator,
+ BLOCK_COUNT_TRANSLATOR,
+ 0, 0, priv_data);
if (ret & BLOCK_ABORT)
- goto abort;
+ goto abort_exit;
}
}
*/
for (i = 0; i < EXT2_NDIR_BLOCKS ; i++, ctx.bcount++) {
if (blocks[i] || (flags & BLOCK_FLAG_APPEND)) {
- ret |= (*func)(fs, &blocks[i], ctx.bcount, private);
+ ret |= (*ctx.func)(fs, &blocks[i],
+ ctx.bcount, 0, i, priv_data);
if (ret & BLOCK_ABORT)
- goto abort;
+ goto abort_exit;
}
}
if (*(blocks + EXT2_IND_BLOCK) || (flags & BLOCK_FLAG_APPEND)) {
- ret |= block_iterate_ind(blocks + EXT2_IND_BLOCK, &ctx);
+ ret |= block_iterate_ind(blocks + EXT2_IND_BLOCK,
+ 0, EXT2_IND_BLOCK, &ctx);
if (ret & BLOCK_ABORT)
- goto 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, &ctx);
+ ret |= block_iterate_dind(blocks + EXT2_DIND_BLOCK,
+ 0, EXT2_DIND_BLOCK, &ctx);
if (ret & BLOCK_ABORT)
- goto 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, &ctx);
+ ret |= block_iterate_tind(blocks + EXT2_TIND_BLOCK,
+ 0, EXT2_TIND_BLOCK, &ctx);
if (ret & BLOCK_ABORT)
- goto abort;
+ goto abort_exit;
}
-abort:
+abort_exit:
if (ret & BLOCK_CHANGED) {
if (!got_inode) {
retval = ext2fs_read_inode(fs, ino, &inode);
}
if (!block_buf)
- free(ctx.ind_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);
+}
+
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff