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Commit f5cb282d authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Theodore Ts'o
Browse files

docs: add new ext4 superblock time extension fields 



The superblock timestamp fields were enlarged by u8 to be 40 bits wide.
Update the documentation to reflect this.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 6684874a

Documentation/filesystems/ext4/ondisk/super.rst

+30 −2
Original line number Diff line number Diff line
@@ -442,8 +442,36 @@ The ext4 superblock is laid out as follows in 
     - Checksum seed used for metadata\_csum calculations. This value is

       crc32c(~0, $orig\_fs\_uuid).

   * - 0x274

     - \_\_le32

     - s\_reserved[98]

     - \_\_u8

     - s\_wtime_hi

     - Upper 8 bits of the s_wtime field.

   * - 0x275

     - \_\_u8

     - s\_wtime_hi

     - Upper 8 bits of the s_mtime field.

   * - 0x276

     - \_\_u8

     - s\_mkfs_time_hi

     - Upper 8 bits of the s_mkfs_time field.

   * - 0x277

     - \_\_u8

     - s\_lastcheck_hi

     - Upper 8 bits of the s_lastcheck_hi field.

   * - 0x278

     - \_\_u8

     - s\_first_error_time_hi

     - Upper 8 bits of the s_first_error_time_hi field.

   * - 0x279

     - \_\_u8

     - s\_last_error_time_hi

     - Upper 8 bits of the s_last_error_time_hi field.

   * - 0x27A

     - \_\_u8[2]

     - s\_pad

     - Zero padding.

   * - 0x27C

     - \_\_le32

     - s\_reserved[96]

     - Padding to the end of the block.

   * - 0x3FC

     - \_\_le32