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xfs: widen ondisk inode timestamps to deal with y2038+

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Redesign the ondisk inode timestamps to be a simple unsigned 64-bit
counter of nanoseconds since 14 Dec 1901 (i.e. the minimum time in the
32-bit unix time epoch).  This enables us to handle dates up to 2486,
which solves the y2038 problem.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2020-08-17 09:59:07 -07:00
parent 30e0559921
commit f93e5436f0
16 changed files with 201 additions and 28 deletions
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13
fs/xfs/xfs_super.c
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@@ -1484,8 +1484,13 @@ xfs_fc_fill_super(
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_max_links = XFS_MAXLINK;
sb->s_time_gran = 1;
sb->s_time_min = XFS_LEGACY_TIME_MIN;
sb->s_time_max = XFS_LEGACY_TIME_MAX;
if (xfs_sb_version_hasbigtime(&mp->m_sb)) {
sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
} else {
sb->s_time_min = XFS_LEGACY_TIME_MIN;
sb->s_time_max = XFS_LEGACY_TIME_MAX;
}
sb->s_iflags |= SB_I_CGROUPWB;
set_posix_acl_flag(sb);
@@ -1494,6 +1499,10 @@ xfs_fc_fill_super(
if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
sb->s_flags |= SB_I_VERSION;
if (xfs_sb_version_hasbigtime(&mp->m_sb))
xfs_warn(mp,
"EXPERIMENTAL big timestamp feature in use. Use at your own risk!");
if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) {
bool rtdev_is_dax = false, datadev_is_dax;