.. SPDX-License-Identifier: GPL-2.0 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | i.i_block Offset | Where It Points | +=====================+==============================================================================================================================================================================================================================+ | 0 to 11 | Direct map to file blocks 0 to 11. | +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | 12 | Indirect block: (file blocks 12 to (``$block_size`` / 4) + 11, or 12 to 1035 if 4KiB blocks) | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | | Indirect Block Offset | Where It Points | | | | +==============================+====================================================================+ | | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | | | +------------------------------+--------------------------------------------------------------------+ | +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | 13 | Double-indirect block: (file blocks ``$block_size``/4 + 12 to (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 11, or 1036 to 1049611 if 4KiB blocks) | | | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | | | | Double Indirect Block Offset | Where It Points | | | | +================================+=========================================================================================================+ | | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) indirect blocks (1024 if 4KiB blocks) | | | | | | | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | | | | | Indirect Block Offset | Where It Points | | | | | | | +==============================+====================================================================+ | | | | | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | 14 | Triple-indirect block: (file blocks (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 12 to (``$block_size`` / 4) ^ 3 + (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 12, or 1049612 to 1074791436 if 4KiB blocks) | | | | | | +--------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------+ | | | | Triple Indirect Block Offset | Where It Points | | | | +================================+================================================================================================================================================+ | | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) double indirect blocks (1024 if 4KiB blocks) | | | | | | | | | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | | | | | | | Double Indirect Block Offset | Where It Points | | | | | | | +================================+=========================================================================================================+ | | | | | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) indirect blocks (1024 if 4KiB blocks) | | | | | | | | | | | | | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | | | | | | | | Indirect Block Offset | Where It Points | | | | | | | | | | +==============================+====================================================================+ | | | | | | | | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | | | | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | | | | +--------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------+ | +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+