From 61fe135c1dde112f483bba01d645debd881b5428 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Wed, 3 Apr 2013 16:11:30 +1100 Subject: xfs: buffer type overruns blf_flags field The buffer type passed to log recvoery in the buffer log item overruns the blf_flags field. I had assumed that flags field was a 32 bit value, and it turns out it is a unisgned short. Therefore having 19 flags doesn't really work. Convert the buffer type field to numeric value, and use the top 5 bits of the flags field for it. We currently have 17 types of buffers, so using 5 bits gives us plenty of room for expansion in future.... Signed-off-by: Dave Chinner Reviewed-by: Ben Myers Signed-off-by: Ben Myers --- fs/xfs/xfs_dir2_block.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/xfs/xfs_dir2_block.c') diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c index 58816ecdbba5..e59f5fc816fe 100644 --- a/fs/xfs/xfs_dir2_block.c +++ b/fs/xfs/xfs_dir2_block.c @@ -137,7 +137,7 @@ xfs_dir3_block_read( err = xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, bpp, XFS_DATA_FORK, &xfs_dir3_block_buf_ops); if (!err && tp) - xfs_trans_buf_set_type(tp, *bpp, XFS_BLF_DIR_BLOCK_BUF); + xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF); return err; } @@ -151,7 +151,7 @@ xfs_dir3_block_init( struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; bp->b_ops = &xfs_dir3_block_buf_ops; - xfs_trans_buf_set_type(tp, bp, XFS_BLF_DIR_BLOCK_BUF); + xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF); if (xfs_sb_version_hascrc(&mp->m_sb)) { memset(hdr3, 0, sizeof(*hdr3)); -- cgit v1.2.3