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SPDX-License-Identifier: GPL-2.0 2 3 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 4 | i.i_block Offset | Where It Points | 5 +=====================+==============================================================================================================================================================================================================================+ 6 | 0 to 11 | Direct map to file blocks 0 to 11. | 7 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 8 | 12 | Indirect block: (file blocks 12 to (``$block_size`` / 4) + 11, or 12 to 1035 if 4KiB blocks) | 9 | | | 10 | | +------------------------------+--------------------------------------------------------------------+ | 11 | | | Indirect Block Offset | Where It Points | | 12 | | +==============================+====================================================================+ | 13 | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | 14 | | +------------------------------+--------------------------------------------------------------------+ | 15 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 16 | 13 | Double-indirect block: (file blocks ``$block_size``/4 + 12 to (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 11, or 1036 to 1049611 if 4KiB blocks) | 17 | | | 18 | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | 19 | | | Double Indirect Block Offset | Where It Points | | 20 | | +================================+=========================================================================================================+ | 21 | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) indirect blocks (1024 if 4KiB blocks) | | 22 | | | | | | 23 | | | | +------------------------------+--------------------------------------------------------------------+ | | 24 | | | | | Indirect Block Offset | Where It Points | | | 25 | | | | +==============================+====================================================================+ | | 26 | | | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | | 27 | | | | +------------------------------+--------------------------------------------------------------------+ | | 28 | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | 29 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 30 | 14 | Triple-indirect block: (file blocks (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 12 to (``$block_size`` / 4) ^ 3 + (``$block_size`` / 4) ^ 2 + (``$block_size`` / 4) + 12, or 1049612 to 1074791436 if 4KiB blocks) | 31 | | | 32 | | +--------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------+ | 33 | | | Triple Indirect Block Offset | Where It Points | | 34 | | +================================+================================================================================================================================================+ | 35 | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) double indirect blocks (1024 if 4KiB blocks) | | 36 | | | | | | 37 | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | | 38 | | | | | Double Indirect Block Offset | Where It Points | | | 39 | | | | +================================+=========================================================================================================+ | | 40 | | | | | 0 to (``$block_size`` / 4) | Map to (``$block_size`` / 4) indirect blocks (1024 if 4KiB blocks) | | | 41 | | | | | | | | | 42 | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | 43 | | | | | | | Indirect Block Offset | Where It Points | | | | 44 | | | | | | +==============================+====================================================================+ | | | 45 | | | | | | | 0 to (``$block_size`` / 4) | Direct map to (``$block_size`` / 4) blocks (1024 if 4KiB blocks) | | | | 46 | | | | | | +------------------------------+--------------------------------------------------------------------+ | | | 47 | | | | +--------------------------------+---------------------------------------------------------------------------------------------------------+ | | 48 | | +--------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------+ | 49 +---------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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