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xfs: widen ondisk quota expiration timestamps to handle y2038+

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Enable the bigtime feature for quota timers.  We decrease the accuracy
of the timers to ~4s in exchange for being able to set timers up to the
bigtime maximum.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2020-08-17 09:59:51 -07:00
parent f93e5436f0
commit 4ea1ff3b49
7 changed files with 102 additions and 6 deletions
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10
fs/xfs/xfs_dquot.c
View File

@ -223,6 +223,8 @@ xfs_qm_init_dquot_blk(
d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
d->dd_diskdq.d_id = cpu_to_be32(curid);
d->dd_diskdq.d_type = type;
if (curid > 0 && xfs_sb_version_hasbigtime(&mp->m_sb))
d->dd_diskdq.d_type |= XFS_DQTYPE_BIGTIME;
if (xfs_sb_version_hascrc(&mp->m_sb)) {
uuid_copy(&d->dd_uuid, &mp->m_sb.sb_meta_uuid);
xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
@ -1179,6 +1181,14 @@ xfs_qm_dqflush_check(
!dqp->q_rtb.timer)
return __this_address;
/* bigtime flag should never be set on root dquots */
if (dqp->q_type & XFS_DQTYPE_BIGTIME) {
if (!xfs_sb_version_hasbigtime(&dqp->q_mount->m_sb))
return __this_address;
if (dqp->q_id == 0)
return __this_address;
}
return NULL;
}