From c2cba57e83dd7d2dda4ec425998b536669632c82 Mon Sep 17 00:00:00 2001 From: Lachlan McIlroy Date: Fri, 12 Oct 2007 11:12:20 +1000 Subject: [PATCH] [XFS] This fix prevents bulkstat from spinning in an infinite loop. Here 'agino' increments through the inodes in an allocation group. At the end of the innermost 'for' loop it will hold the value of the next inode to look at (ie the first inode in the next cluster/chunk). Assigning 'lastino' to 'agino' resets it to the last inode in the last inode cluster we just looked at. This causes us to look up the very same cluster and examine all the inodes all over again, and again, and again... We also want to set 'lastino' for the cases when we're not interested in the inode so that the next call to bulkstat won't re-examine the same uninteresting inodes. SGI-PV: 971064 SGI-Modid: xfs-linux-melb:xfs-kern:29840a Signed-off-by: Lachlan McIlroy Signed-off-by: David Chinner Signed-off-by: Tim Shimmin --- fs/xfs/xfs_itable.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 1edd9afb664b..9972992fd3c3 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -619,21 +619,25 @@ xfs_bulkstat( } } } + ino = XFS_AGINO_TO_INO(mp, agno, agino); + bno = XFS_AGB_TO_DADDR(mp, agno, agbno); /* * Skip if this inode is free. */ - if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) + if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) { + lastino = ino; continue; + } /* * Count used inodes as free so we can tell * when the chunk is used up. */ irbp->ir_freecount++; - ino = XFS_AGINO_TO_INO(mp, agno, agino); - bno = XFS_AGB_TO_DADDR(mp, agno, agbno); if (!xfs_bulkstat_use_dinode(mp, flags, bp, - clustidx, &dip)) + clustidx, &dip)) { + lastino = ino; continue; + } /* * If we need to do an iget, cannot hold bp. * Drop it, until starting the next cluster. @@ -694,8 +698,7 @@ xfs_bulkstat( if (end_of_ag) { agno++; agino = 0; - } else - agino = XFS_INO_TO_AGINO(mp, lastino); + } } else break; }