xfs: update incore per-AG inode count

For whatever reason we never actually update pagi_count (the in-core
perag inode count) when we allocate or free inode chunks.  Online scrub
is going to use it, so we need to fix the accounting.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 8ec39dad62d7..0d968e8143aa 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -897,6 +897,7 @@ sparse_alloc:
         be32_add_cpu(&agi->agi_freecount, newlen);
         pag = xfs_perag_get(args.mp, agno);
         pag->pagi_freecount += newlen;
+        pag->pagi_count += newlen;
         xfs_perag_put(pag);
         agi->agi_newino = cpu_to_be32(newino);
 
@@ -1991,6 +1992,7 @@ xfs_difree_inobt(
                 xfs_ialloc_log_agi(tp, agbp, XFS_AGI_COUNT | XFS_AGI_FREECOUNT);
                 pag = xfs_perag_get(mp, agno);
                 pag->pagi_freecount -= ilen - 1;
+                pag->pagi_count -= ilen;
                 xfs_perag_put(pag);
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, -ilen);
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -(ilen - 1));