zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/rw_bitmaps.c b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/rw_bitmaps.c
new file mode 100644
index 0000000..b7d65a9
--- /dev/null
+++ b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/rw_bitmaps.c
@@ -0,0 +1,357 @@
+/*
+ * rw_bitmaps.c --- routines to read and write the inode and block bitmaps.
+ *
+ * Copyright (C) 1993, 1994, 1994, 1996 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+#include "e2image.h"
+
+static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
+{
+ dgrp_t i;
+ unsigned int j;
+ int block_nbytes, inode_nbytes;
+ unsigned int nbits;
+ errcode_t retval;
+ char *block_buf = NULL, *inode_buf = NULL;
+ int csum_flag = 0;
+ blk64_t blk;
+ blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
+ ext2_ino_t ino_itr = 1;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if (!(fs->flags & EXT2_FLAG_RW))
+ return EXT2_ET_RO_FILSYS;
+
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ csum_flag = 1;
+
+ inode_nbytes = block_nbytes = 0;
+ if (do_block) {
+ block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
+ retval = io_channel_alloc_buf(fs->io, 0, &block_buf);
+ if (retval)
+ goto errout;
+ memset(block_buf, 0xff, fs->blocksize);
+ }
+ if (do_inode) {
+ inode_nbytes = (size_t)
+ ((EXT2_INODES_PER_GROUP(fs->super)+7) / 8);
+ retval = io_channel_alloc_buf(fs->io, 0, &inode_buf);
+ if (retval)
+ goto errout;
+ memset(inode_buf, 0xff, fs->blocksize);
+ }
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ if (!do_block)
+ goto skip_block_bitmap;
+
+ if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)
+ )
+ goto skip_this_block_bitmap;
+
+ retval = ext2fs_get_block_bitmap_range2(fs->block_map,
+ blk_itr, block_nbytes << 3, block_buf);
+ if (retval)
+ goto errout;
+
+ if (i == fs->group_desc_count - 1) {
+ /* Force bitmap padding for the last group */
+ nbits = EXT2FS_NUM_B2C(fs,
+ ((ext2fs_blocks_count(fs->super)
+ - (__u64) fs->super->s_first_data_block)
+ % (__u64) EXT2_BLOCKS_PER_GROUP(fs->super)));
+ if (nbits)
+ for (j = nbits; j < fs->blocksize * 8; j++)
+ ext2fs_set_bit(j, block_buf);
+ }
+ blk = ext2fs_block_bitmap_loc(fs, i);
+ if (blk) {
+ retval = io_channel_write_blk64(fs->io, blk, 1,
+ block_buf);
+ if (retval) {
+ retval = EXT2_ET_BLOCK_BITMAP_WRITE;
+ goto errout;
+ }
+ }
+ skip_this_block_bitmap:
+ blk_itr += block_nbytes << 3;
+ skip_block_bitmap:
+
+ if (!do_inode)
+ continue;
+
+ if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)
+ )
+ goto skip_this_inode_bitmap;
+
+ retval = ext2fs_get_inode_bitmap_range2(fs->inode_map,
+ ino_itr, inode_nbytes << 3, inode_buf);
+ if (retval)
+ goto errout;
+
+ blk = ext2fs_inode_bitmap_loc(fs, i);
+ if (blk) {
+ retval = io_channel_write_blk64(fs->io, blk, 1,
+ inode_buf);
+ if (retval) {
+ retval = EXT2_ET_INODE_BITMAP_WRITE;
+ goto errout;
+ }
+ }
+ skip_this_inode_bitmap:
+ ino_itr += inode_nbytes << 3;
+
+ }
+ if (do_block) {
+ fs->flags &= ~EXT2_FLAG_BB_DIRTY;
+ ext2fs_free_mem(&block_buf);
+ }
+ if (do_inode) {
+ fs->flags &= ~EXT2_FLAG_IB_DIRTY;
+ ext2fs_free_mem(&inode_buf);
+ }
+ return 0;
+errout:
+ if (inode_buf)
+ ext2fs_free_mem(&inode_buf);
+ if (block_buf)
+ ext2fs_free_mem(&block_buf);
+ return retval;
+}
+
+static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
+{
+ dgrp_t i;
+ char *block_bitmap = 0, *inode_bitmap = 0;
+ char *buf;
+ errcode_t retval;
+ int block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
+ int inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
+ int csum_flag = 0;
+ unsigned int cnt;
+ blk64_t blk;
+ blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
+ blk64_t blk_cnt;
+ ext2_ino_t ino_itr = 1;
+ ext2_ino_t ino_cnt;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if ((block_nbytes > (int) fs->blocksize) ||
+ (inode_nbytes > (int) fs->blocksize))
+ return EXT2_ET_CORRUPT_SUPERBLOCK;
+
+ fs->write_bitmaps = ext2fs_write_bitmaps;
+
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ csum_flag = 1;
+
+ retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
+ if (retval)
+ return retval;
+ if (do_block) {
+ if (fs->block_map)
+ ext2fs_free_block_bitmap(fs->block_map);
+ strcpy(buf, "block bitmap for ");
+ strcat(buf, fs->device_name);
+ retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map);
+ if (retval)
+ goto cleanup;
+ retval = io_channel_alloc_buf(fs->io, 0, &block_bitmap);
+ if (retval)
+ goto cleanup;
+ } else
+ block_nbytes = 0;
+ if (do_inode) {
+ if (fs->inode_map)
+ ext2fs_free_inode_bitmap(fs->inode_map);
+ strcpy(buf, "inode bitmap for ");
+ strcat(buf, fs->device_name);
+ retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
+ if (retval)
+ goto cleanup;
+ retval = io_channel_alloc_buf(fs->io, 0, &inode_bitmap);
+ if (retval)
+ goto cleanup;
+ } else
+ inode_nbytes = 0;
+ ext2fs_free_mem(&buf);
+
+ if (fs->flags & EXT2_FLAG_IMAGE_FILE) {
+ blk = (fs->image_header->offset_inodemap / fs->blocksize);
+ ino_cnt = fs->super->s_inodes_count;
+ while (inode_nbytes > 0) {
+ retval = io_channel_read_blk64(fs->image_io, blk++,
+ 1, inode_bitmap);
+ if (retval)
+ goto cleanup;
+ cnt = fs->blocksize << 3;
+ if (cnt > ino_cnt)
+ cnt = ino_cnt;
+ retval = ext2fs_set_inode_bitmap_range2(fs->inode_map,
+ ino_itr, cnt, inode_bitmap);
+ if (retval)
+ goto cleanup;
+ ino_itr += fs->blocksize << 3;
+ ino_cnt -= fs->blocksize << 3;
+ inode_nbytes -= fs->blocksize;
+ }
+ blk = (fs->image_header->offset_blockmap /
+ fs->blocksize);
+ blk_cnt = (blk64_t)EXT2_CLUSTERS_PER_GROUP(fs->super) *
+ fs->group_desc_count;
+ while (block_nbytes > 0) {
+ retval = io_channel_read_blk64(fs->image_io, blk++,
+ 1, block_bitmap);
+ if (retval)
+ goto cleanup;
+ cnt = fs->blocksize << 3;
+ if (cnt > blk_cnt)
+ cnt = blk_cnt;
+ retval = ext2fs_set_block_bitmap_range2(fs->block_map,
+ blk_itr, cnt, block_bitmap);
+ if (retval)
+ goto cleanup;
+ blk_itr += fs->blocksize << 3;
+ blk_cnt -= fs->blocksize << 3;
+ block_nbytes -= fs->blocksize;
+ }
+ goto success_cleanup;
+ }
+
+ for (i = 0; i < fs->group_desc_count; i++) {
+ if (block_bitmap) {
+ blk = ext2fs_block_bitmap_loc(fs, i);
+ if (csum_flag &&
+ ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) &&
+ ext2fs_group_desc_csum_verify(fs, i))
+ blk = 0;
+ if (blk) {
+ retval = io_channel_read_blk64(fs->io, blk,
+ 1, block_bitmap);
+ if (retval) {
+ retval = EXT2_ET_BLOCK_BITMAP_READ;
+ goto cleanup;
+ }
+ } else
+ memset(block_bitmap, 0, block_nbytes);
+ cnt = block_nbytes << 3;
+ retval = ext2fs_set_block_bitmap_range2(fs->block_map,
+ blk_itr, cnt, block_bitmap);
+ if (retval)
+ goto cleanup;
+ blk_itr += block_nbytes << 3;
+ }
+ if (inode_bitmap) {
+ blk = ext2fs_inode_bitmap_loc(fs, i);
+ if (csum_flag &&
+ ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) &&
+ ext2fs_group_desc_csum_verify(fs, i))
+ blk = 0;
+ if (blk) {
+ retval = io_channel_read_blk64(fs->io, blk,
+ 1, inode_bitmap);
+ if (retval) {
+ retval = EXT2_ET_INODE_BITMAP_READ;
+ goto cleanup;
+ }
+ } else
+ memset(inode_bitmap, 0, inode_nbytes);
+ cnt = inode_nbytes << 3;
+ retval = ext2fs_set_inode_bitmap_range2(fs->inode_map,
+ ino_itr, cnt, inode_bitmap);
+ if (retval)
+ goto cleanup;
+ ino_itr += inode_nbytes << 3;
+ }
+ }
+success_cleanup:
+ if (inode_bitmap)
+ ext2fs_free_mem(&inode_bitmap);
+ if (block_bitmap)
+ ext2fs_free_mem(&block_bitmap);
+ return 0;
+
+cleanup:
+ if (do_block) {
+ ext2fs_free_mem(&fs->block_map);
+ fs->block_map = 0;
+ }
+ if (do_inode) {
+ ext2fs_free_mem(&fs->inode_map);
+ fs->inode_map = 0;
+ }
+ if (inode_bitmap)
+ ext2fs_free_mem(&inode_bitmap);
+ if (block_bitmap)
+ ext2fs_free_mem(&block_bitmap);
+ if (buf)
+ ext2fs_free_mem(&buf);
+ return retval;
+}
+
+errcode_t ext2fs_read_inode_bitmap(ext2_filsys fs)
+{
+ return read_bitmaps(fs, 1, 0);
+}
+
+errcode_t ext2fs_read_block_bitmap(ext2_filsys fs)
+{
+ return read_bitmaps(fs, 0, 1);
+}
+
+errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs)
+{
+ return write_bitmaps(fs, 1, 0);
+}
+
+errcode_t ext2fs_write_block_bitmap (ext2_filsys fs)
+{
+ return write_bitmaps(fs, 0, 1);
+}
+
+errcode_t ext2fs_read_bitmaps(ext2_filsys fs)
+{
+ if (fs->inode_map && fs->block_map)
+ return 0;
+
+ return read_bitmaps(fs, !fs->inode_map, !fs->block_map);
+}
+
+errcode_t ext2fs_write_bitmaps(ext2_filsys fs)
+{
+ int do_inode = fs->inode_map && ext2fs_test_ib_dirty(fs);
+ int do_block = fs->block_map && ext2fs_test_bb_dirty(fs);
+
+ if (!do_inode && !do_block)
+ return 0;
+
+ return write_bitmaps(fs, do_inode, do_block);
+}