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xfs: prevent rt growfs when quota is enabled

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[ Upstream commit b73494fa9a304ab95b59f07845e8d7d36e4d23e0 ]

Quotas aren't (yet) supported with realtime, so we shouldn't allow
userspace to set up a realtime section when quotas are enabled, even if
they attached one via mount options.  IOWS, you shouldn't be able to do:

# mkfs.xfs -f /dev/sda
# mount /dev/sda /mnt -o rtdev=/dev/sdb,usrquota
# xfs_growfs -r /mnt

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Darrick J. Wong
2025-01-29 10:47:01 -08:00
committed by Greg Kroah-Hartman
parent 8ee604ac13
commit 9670abd18c
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_rtalloc.c
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@@ -954,7 +954,7 @@ xfs_growfs_rt(
return -EINVAL;
/* Unsupported realtime features. */
if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp))
if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp) || xfs_has_quota(mp))
return -EOPNOTSUPP;
nrblocks = in->newblocks;