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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-29 16:16:21 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-07-29 16:16:21 -0400 |
| commit | f5cb282d8b08c05ad70ebde9a8fd2decf32a6406 (patch) | |
| tree | d1824a40b3356212ee8d0ede7dbcaa892f283fec /Documentation/filesystems/ext4 | |
| parent | 6684874af0637c63f4c91e8c2120c64e6e8bb79e (diff) | |
| download | linux-f5cb282d8b08c05ad70ebde9a8fd2decf32a6406.tar.bz2 | |
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: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation/filesystems/ext4')
| -rw-r--r-- | Documentation/filesystems/ext4/ondisk/super.rst | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/filesystems/ext4/ondisk/super.rst b/Documentation/filesystems/ext4/ondisk/super.rst index 1f5ac9ab6f0c..5f81dd87e0b9 100644 --- a/Documentation/filesystems/ext4/ondisk/super.rst +++ b/Documentation/filesystems/ext4/ondisk/super.rst @@ -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 |