From 14d0cd7225e250015eb6d9c79a7eb4e944211b23 Mon Sep 17 00:00:00 2001 From: Kirk McKusick Date: Wed, 14 Apr 2021 15:22:12 -0700 Subject: [PATCH] Ensure that the mount command shows "with quotas" when quotas are enabled. When quotas are enabled with the quotaon(8) command, it sets the MNT_QUOTA flag in the mount structure mnt_flag field. The mount structure holds a cached copy of the filesystem statfs structure in mnt_stat that includes a copy of the mnt_flag field in mnt_stat.f_flags. The mnt_stat structure may not be updated for hours. Since the mount command requests mount details using the MNT_NOWAIT option, it gets the mount's mnt_stat statfs structure whose f_flags field does not yet show the MNT_QUOTA flag being set in mnt_flag. The fix is to have quotaon(8) set the MNT_QUOTA flag in both mnt_flag and in mnt_stat.f_flags so that it will be immediately visible to callers of statfs(2). Reported by: Christos Chatzaras Tested by: Christos Chatzaras PR: 254682 MFC after: 3 days Sponsored by: Netflix --- sys/ufs/ufs/ufs_quota.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/ufs/ufs/ufs_quota.c b/sys/ufs/ufs/ufs_quota.c index 47c8133adc1..4dff74f7594 100644 --- a/sys/ufs/ufs/ufs_quota.c +++ b/sys/ufs/ufs/ufs_quota.c @@ -562,6 +562,7 @@ quotaon(struct thread *td, struct mount *mp, int type, void *fname) VOP_UNLOCK(vp); MNT_ILOCK(mp); mp->mnt_flag |= MNT_QUOTA; + mp->mnt_stat.f_flags |= MNT_QUOTA; MNT_IUNLOCK(mp); vpp = &ump->um_quotas[type]; @@ -764,6 +765,7 @@ quotaoff_inchange(struct thread *td, struct mount *mp, int type) if (i == MAXQUOTAS) { MNT_ILOCK(mp); mp->mnt_flag &= ~MNT_QUOTA; + mp->mnt_stat.f_flags &= ~MNT_QUOTA; MNT_IUNLOCK(mp); } UFS_UNLOCK(ump);