void do_goto_block(int argc, char **argv)
{
errcode_t retval;
blk64_t blk;
int level = 0, err;
if (common_extent_args_process(argc, argv, 2, 3, "goto_block",
"block [level]", 0))
return;
if (strtoblk(argv[0], argv[1], &blk))
return;
if (argc == 3) {
level = parse_ulong(argv[2], argv[0], "level", &err);
if (err)
return;
}
retval = ext2fs_extent_goto2(current_handle, level, (blk64_t) blk);
if (retval) {
com_err(argv[0], retval,
"while trying to go to block %llu, level %d",
(unsigned long long) blk, level);
return;
}
generic_goto_node(NULL, argc, argv, EXT2_EXTENT_CURRENT);
}
/*
* Traverse back up to root fixing parents of current node as needed.
*
* If we changed start of first entry in a node, fix parent index start
* and so on.
*
* Safe to call for any position in node; if not at the first entry,
* will simply return.
*/
errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle)
{
int retval = 0;
int orig_height;
blk64_t start;
struct extent_path *path;
struct ext2fs_extent extent;
struct ext2_extent_info info;
EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EXTENT_HANDLE);
if (!(handle->fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
if (!handle->path)
return EXT2_ET_NO_CURRENT_NODE;
path = handle->path + handle->level;
if (!path->curr)
return EXT2_ET_NO_CURRENT_NODE;
retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
if (retval)
goto done;
/* modified node's start block */
start = extent.e_lblk;
if ((retval = ext2fs_extent_get_info(handle, &info)))
return retval;
orig_height = info.max_depth - info.curr_level;
/* traverse up until index not first, or startblk matches, or top */
while (handle->level > 0 &&
(path->left == path->entries - 1)) {
retval = ext2fs_extent_get(handle, EXT2_EXTENT_UP, &extent);
if (retval)
goto done;
if (extent.e_lblk == start)
break;
path = handle->path + handle->level;
extent.e_len += (extent.e_lblk - start);
extent.e_lblk = start;
retval = ext2fs_extent_replace(handle, 0, &extent);
if (retval)
goto done;
update_path(handle);
}
/* put handle back to where we started */
retval = ext2fs_extent_goto2(handle, orig_height, start);
done:
return retval;
}
blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode *inode, blk64_t lblk)
{
dgrp_t group;
__u8 log_flex;
struct ext2fs_extent extent;
ext2_extent_handle_t handle = NULL;
errcode_t err;
if (inode == NULL || ext2fs_inode_data_blocks2(fs, inode) == 0)
goto no_blocks;
if (inode->i_flags & EXT4_INLINE_DATA_FL)
goto no_blocks;
if (inode->i_flags & EXT4_EXTENTS_FL) {
err = ext2fs_extent_open2(fs, ino, inode, &handle);
if (err)
goto no_blocks;
err = ext2fs_extent_goto2(handle, 0, lblk);
if (err)
goto no_blocks;
err = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
if (err)
goto no_blocks;
ext2fs_extent_free(handle);
return extent.e_pblk + (lblk - extent.e_lblk);
}
/* block mapped file; see if block zero is mapped? */
if (inode->i_block[0])
return inode->i_block[0];
no_blocks:
ext2fs_extent_free(handle);
log_flex = fs->super->s_log_groups_per_flex;
group = ext2fs_group_of_ino(fs, ino);
if (log_flex)
group = group & ~((1 << (log_flex)) - 1);
return ext2fs_group_first_block2(fs, group);
}
errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
blk64_t blk)
{
return ext2fs_extent_goto2(handle, 0, blk);
}