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#include "project.h"
typedef struct {
ext2_filsys fs;
ext2_ino_t i_num;
struct ext2_inode *dst_i;
ext2_extent_handle_t eh;
blk64_t l_start;
blk64_t l_len;
int ret;
} context_t;
static int make_extents (ext2_filsys fs, blk64_t *b_num,
e2_blkcnt_t blockcnt,
blk64_t ref_block,
int ref_offset,
void *_dst)
{
context_t *dst = (context_t *)_dst;
if (dst->ret) return BLOCK_ABORT;
if (!dst->l_len)
dst->l_start = blockcnt;
if ((dst->l_start + dst->l_len) != blockcnt) {
dst->ret = allocate_extent (dst->fs, dst->i_num, dst->eh, dst->l_start, dst->l_len, EXT2_EXTENT_FLAGS_LEAF);
if (dst->ret) return BLOCK_ABORT;
dst->dst_i->i_blocks += dst->l_len * (dst->fs->blocksize / 512);
dst->l_len = 1;
dst->l_start = blockcnt;
} else
dst->l_len++;
return 0;
}
int clone_blocks (ext2_filsys src_fs, ext2_filsys dst_fs, ext2_ino_t i_num, struct ext2_inode *src_i, struct ext2_inode *dst_i)
{
context_t dst;
struct ext2fs_extent e;
int ret;
dst.fs = dst_fs;
dst.i_num = i_num;
dst.dst_i = dst_i;
dst.eh = NULL;
dst.l_start = 0;
dst.l_len = 0;
dst.ret = 0;
do {
dst_i->i_flags |= EXT4_EXTENTS_FL;
EXT2_MOAN_FAIL (ret, ext2fs_extent_open2 (dst_fs, i_num, dst_i, &dst.eh));
if (ret)
break;
EXT2_MOAN_FAIL (ret, ext2fs_block_iterate3 (src_fs, i_num, BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_READ_ONLY, 0, make_extents, &dst));
if (ret) break;
ret = dst.ret;
if (ret) break;
if (dst.l_len) {
ret = allocate_extent (dst_fs, i_num, dst.eh, dst.l_start, dst.l_len, EXT2_EXTENT_FLAGS_LEAF);
dst_i->i_blocks += dst.l_len * (dst_fs->blocksize / 512);
if (ret) break;
}
EXT2_MOAN_FAIL (ret, ext2fs_write_inode (dst_fs, i_num, dst_i));
if (ret)
break;
ret = ext2fs_extent_get (dst.eh, EXT2_EXTENT_ROOT, &e);
if (ret == EXT2_ET_EXTENT_NO_NEXT) {
ret = 0;
break;
}
if (ret) {
EXT2_MOAN (ret, "ext2fs_extent_get (dst.eh, EXT2_EXTENT_ROOT, &e)");
break;
}
for (;;) {
uint64_t file_offset, file_len;
if ((e.e_flags & EXT2_EXTENT_FLAGS_LEAF) && ! (e.e_flags & EXT2_EXTENT_FLAGS_UNINIT)) {
file_offset = e.e_lblk;
file_len = e.e_len;
file_offset *= src_fs->blocksize;
file_len *= src_fs->blocksize;
if (clone_data (src_fs, dst_fs, i_num, src_i, dst_i, file_offset, file_len)) {
ret = 1;
break;
}
}
ret = ext2fs_extent_get (dst.eh, EXT2_EXTENT_NEXT_LEAF, &e);
if (ret == EXT2_ET_EXTENT_NO_NEXT) {
ret = 0;
break;
}
if (ret) {
EXT2_MOAN (ret, "ext2fs_extent_get (dst.eh, EXT2_EXTENT_NEXT_LEAF, &e)");
break;
}
}
} while (0);
if (dst.eh)
ext2fs_extent_free (dst.eh);
return ret;
}
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