Darrick J. Wong c41bc070d2 xfs: fix reflink quota reservation accounting error
[ Upstream commit 83895227aba1ade33e81f586aa7b6b1e143096a5 ]

Quota reservations are supposed to account for the blocks that might be
allocated due to a bmap btree split.  Reflink doesn't do this, so fix
this to make the quota accounting more accurate before we start
rearranging things.

Fixes: 862bb360ef56 ("xfs: reflink extents from one file to another")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-21 11:02:01 +02:00
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