From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> When xfs_defer_capture extracts the deferred ops and transaction state from a transaction, it should record the transaction reservation type from the old transaction so that when we continue the dfops chain, we still use the same reservation parameters. This avoids a potential failure vector by ensuring that we never ask for more log reservation space than we would have asked for had the system not gone down. Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --- fs/xfs/libxfs/xfs_defer.c | 5 +++++ fs/xfs/libxfs/xfs_defer.h | 1 + fs/xfs/xfs_log_recover.c | 4 ++-- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c index 85d70f1edc1c..c53443252389 100644 --- a/fs/xfs/libxfs/xfs_defer.c +++ b/fs/xfs/libxfs/xfs_defer.c @@ -577,6 +577,11 @@ xfs_defer_capture( dfc->dfc_blkres = tp->t_blk_res - tp->t_blk_res_used; tp->t_blk_res = tp->t_blk_res_used; + /* Preserve the transaction reservation type. */ + dfc->dfc_tres.tr_logres = tp->t_log_res; + dfc->dfc_tres.tr_logcount = tp->t_log_count; + dfc->dfc_tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; + return dfc; } diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h index 999adbb8c449..063276c063b6 100644 --- a/fs/xfs/libxfs/xfs_defer.h +++ b/fs/xfs/libxfs/xfs_defer.h @@ -77,6 +77,7 @@ struct xfs_defer_capture { struct list_head dfc_dfops; unsigned int dfc_tpflags; unsigned int dfc_blkres; + struct xfs_trans_res dfc_tres; }; /* diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 60670ac4e5ae..0d899ab7df2e 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2487,8 +2487,8 @@ xlog_finish_defer_ops( int error = 0; list_for_each_entry_safe(dfc, next, capture_list, dfc_list) { - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, - 0, XFS_TRANS_RESERVE, &tp); + error = xfs_trans_alloc(mp, &dfc->dfc_tres, 0, 0, + XFS_TRANS_RESERVE, &tp); if (error) return error;