xfs: Make xfs_trans_mod_sb() aware of negative deltas
PATCH 15/15 xfs: Make xfs_trans_mod_sb() aware of negative deltas
For FS shrink, the FS_DBLOCKS will be reduced, and maybe the AG count will be decreased as well if there have empty AGs beyond the new FS size. This patch is trying to make xfs_trans_mod_sb() aware of those possible negative delta values for shrinkfs only.
Signed-off-by Jie Liu <[email protected]>
--- fs/xfs/xfs_trans.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
fs/xfs/xfs_trans.c +9 -3
@@ -864,7 +864,7 @@ xfs_trans_mod_sb(* transaction. Make sure it does not exceed the * number reserved. */ -if (delta <0 ) { +if (delta <0 && tp->t_type !=XFS_TRANS_SHRINKFS ) { tp->t_blk_res_used += (uint)-delta;ASSERT (tp->t_blk_res_used <= tp->t_blk_res); }
@@ -905,11 +905,17 @@ xfs_trans_mod_sb( tp->t_res_frextents_delta += delta;break ;case XFS_TRANS_SB_DBLOCKS : -ASSERT (delta >0 ); +if (tp->t_type !=XFS_TRANS_SHRINKFS ) +ASSERT (delta >0 ); +else +ASSERT (delta <0 ); tp->t_dblocks_delta += delta;break ;case XFS_TRANS_SB_AGCOUNT : -ASSERT (delta >0 ); +if (tp->t_type !=XFS_TRANS_SHRINKFS ) +ASSERT (delta >0 ); +else +ASSERT (delta <0 ); tp->t_agcount_delta += delta;break ;case XFS_TRANS_SB_IMAXPCT :
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