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authorDarrick J. Wong <darrick.wong@oracle.com>2018-07-29 16:16:21 -0400
committerTheodore Ts'o <tytso@mit.edu>2018-07-29 16:16:21 -0400
commitf5cb282d8b08c05ad70ebde9a8fd2decf32a6406 (patch)
treed1824a40b3356212ee8d0ede7dbcaa892f283fec /Documentation/filesystems
parent6684874af0637c63f4c91e8c2120c64e6e8bb79e (diff)
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')
-rw-r--r--Documentation/filesystems/ext4/ondisk/super.rst32
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