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authorDenis Vlasenko2006-12-26 01:30:59 +0000
committerDenis Vlasenko2006-12-26 01:30:59 +0000
commitc4f623ef2a7980a63de7c9f1d539a656b83f10e7 (patch)
treea294e28b0112052cb9d58b403554b3390e76f50c /e2fsprogs/old_e2fsprogs/ext2fs/block.c
parent64c54025842f205ad722675105b88044a5b6845a (diff)
downloadbusybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.zip
busybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.tar.gz
put small subset of e2fsprogs back in the tree:
lsattr, chattr, fsck. Old e2fsprogs tree is in e2fsprogs/old_e2fsprogs/*.
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/ext2fs/block.c')
-rw-r--r--e2fsprogs/old_e2fsprogs/ext2fs/block.c438
1 files changed, 438 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/block.c b/e2fsprogs/old_e2fsprogs/ext2fs/block.c
new file mode 100644
index 0000000..0a757b2
--- /dev/null
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/block.c
@@ -0,0 +1,438 @@
+/* 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);
+}
+