From 5575acc7807595687288b3bbac15103f2a5462e1 Mon Sep 17 00:00:00 2001 From: Kamal Dasu Date: Thu, 23 Feb 2012 00:41:39 +0000 Subject: [PATCH] xfs: fix deadlock in xfs_rtfree_extent To fix the deadlock caused by repeatedly calling xfs_rtfree_extent - removed xfs_ilock() and xfs_trans_ijoin() from xfs_rtfree_extent(), instead added asserts that the inode is locked and has an inode_item attached to it. - in xfs_bunmapi() when dealing with an inode with the rt flag call xfs_ilock() and xfs_trans_ijoin() so that the reference count is bumped on the inode and attached it to the transaction before calling into xfs_bmap_del_extent, similar to what we do in xfs_bmap_rtalloc. Signed-off-by: Kamal Dasu Reviewed-by: Christoph Hellwig Signed-off-by: Ben Myers --- fs/xfs/xfs_bmap.c | 9 +++++++++ fs/xfs/xfs_rtalloc.c | 9 ++++----- 2 files changed, 13 insertions(+), 5 deletions(-) diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 3548c6f75593..85e7e327bcd8 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -5124,6 +5124,15 @@ xfs_bunmapi( cur->bc_private.b.flags = 0; } else cur = NULL; + + if (isrt) { + /* + * Synchronize by locking the bitmap inode. + */ + xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); + xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); + } + extno = 0; while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && (nexts == 0 || extno < nexts)) { diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index 87323f1ded64..ca4f31534a0a 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -183,6 +183,7 @@ xfs_growfs_rt_alloc( oblocks = map.br_startoff + map.br_blockcount; } return 0; + error: return error; } @@ -2139,11 +2140,9 @@ xfs_rtfree_extent( xfs_buf_t *sumbp; /* summary file block buffer */ mp = tp->t_mountp; - /* - * Synchronize by locking the bitmap inode. - */ - xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); + + ASSERT(mp->m_rbmip->i_itemp != NULL); + ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL)); #if defined(__KERNEL__) && defined(DEBUG) /* -- GitLab