btrfs-progs: docs: corrected table on chunk_item.

Corrected table format in RST.
Added minor detailed explainations.

Signed-off-by: HAN Yuwei <[email protected]>

Documentation/dev/On-disk-format.rst

@@ -1074,27 +1074,38 @@ Off   Size Type Description
 ===== ==== ==== ==============================
 
 
-CHUNK_ITEM (e4)
+CHUNK_ITEM (0xe4)
 ^^^^^^^^^^^^^^^
 
-(100, logical address) TODO
-
-| ``   Maps logical address to physical.``
-| ``    0  8 UINT   size of chunk (bytes)``
-| ``    8  8 OBJID  root referencing this chunk (2)``
-| ``   10  8 UINT   stripe length``
-| ``   18  8 UINT   type (same as flags for block group?)``
-| ``   20  4 UINT   optimal io alignment``
-| ``   24  4 UINT   optimal io width``
-| ``   28  4 UINT   minimal io size (sector size)``
-| ``   2c  2 UINT   number of stripes``
-| ``   2e  2 UINT   sub stripes``
-| ``   30``
-| ``   Stripes follow (for each number of stripes):``
-| ``    0  8 OBJID  device id``
-| ``    8  8 UINT   offset``
-| ``   10 10 UUID   device UUID``
-| ``   20``
+Key format: (100, logical address)
+
+Maps logical address to physical.
+
+==== ==== ===== ===========
+Off  Size Type  Description
+==== ==== ===== ===========
+0x0  0x8  UINT  size of chunk (bytes)
+0x8  0x8  OBJID root referencing this chunk(2)
+0x10 0x8  UINT  stripe length
+0x18 0x8  UINT  type (same as flags for block group?)
+0x20 0x4  UINT  optimal io alignment
+0x24 0x4  UINT  optimal io width
+0x28 0x4  UINT  minimal io size (sector size)
+0x2c 0x2  UINT  number of stripes
+0x2e 0x2  UINT  sub stripes (only for RAID10,fixed 2)
+0x30
+==== ==== ===== ===========
+
+Stripes follow (for each number of stripes):
+
+==== ==== ===== ===========
+Off  Size Type  Description
+==== ==== ===== ===========
+0x0  0x8  OBJID device id
+0x8  0x8  UINT  physical offset of stripe on device
+0x10 0x10 UUID  device UUID
+0x20
+==== ==== ===== ===========
 
 
 STRING_ITEM (fd)