[PATCH 03/11] xfs: xfs_inode_free_quota_blocks should scan project quota

Darrick J. Wong
2021-01-23T18:53:18Z

From: Darrick J. Wong <djwong@kernel.org>

Buffered writers who have run out of quota reservation call
xfs_inode_free_quota_blocks to try to free any space reservations that
might reduce the quota usage. Unfortunately, the buffered write path
treats "out of project quota" the same as "out of overall space" so this
function has never supported scanning for space that might ease an "out
of project quota" condition.

We're about to start using this function for cases where we actually
/can/ tell if we're out of project quota, so add in this functionality.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/xfs_icache.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 89f9e692fde7..10c1a0dee17d 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1434,6 +1434,15 @@ xfs_inode_free_quota_blocks(
}
}

+ if (XFS_IS_PQUOTA_ENFORCED(ip->i_mount)) {
+ dq = xfs_inode_dquot(ip, XFS_DQTYPE_PROJ);
+ if (dq && xfs_dquot_lowsp(dq)) {
+ eofb.eof_prid = ip->i_d.di_projid;
+ eofb.eof_flags |= XFS_EOF_FLAGS_PRID;
+ do_work = true;
+ }
+ }
+
if (!do_work)
return false;