From 1813dd64057490e7a0678a885c4fe6d02f78bdc1 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Wed, 14 Nov 2012 17:54:40 +1100 Subject: xfs: convert buffer verifiers to an ops structure. To separate the verifiers from iodone functions and associate read and write verifiers at the same time, introduce a buffer verifier operations structure to the xfs_buf. This avoids the need for assigning the write verifier, clearing the iodone function and re-running ioend processing in the read verifier, and gets rid of the nasty "b_pre_io" name for the write verifier function pointer. If we ever need to, it will also be easier to add further content specific callbacks to a buffer with an ops structure in place. We also avoid needing to export verifier functions, instead we can simply export the ops structures for those that are needed outside the function they are defined in. This patch also fixes a directory block readahead verifier issue it exposed. This patch also adds ops callbacks to the inode/alloc btree blocks initialised by growfs. These will need more work before they will work with CRCs. Signed-off-by: Dave Chinner Reviewed-by: Phil White Signed-off-by: Ben Myers --- fs/xfs/xfs_dir2_leaf.c | 36 ++++++++++++++++++++---------------- 1 file changed, 20 insertions(+), 16 deletions(-) (limited to 'fs/xfs/xfs_dir2_leaf.c') diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c index 3002ab7d54c3..60cd2fa4e047 100644 --- a/fs/xfs/xfs_dir2_leaf.c +++ b/fs/xfs/xfs_dir2_leaf.c @@ -65,39 +65,43 @@ xfs_dir2_leaf_verify( } static void -xfs_dir2_leaf1_write_verify( +xfs_dir2_leaf1_read_verify( struct xfs_buf *bp) { xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC)); } static void -xfs_dir2_leaf1_read_verify( +xfs_dir2_leaf1_write_verify( struct xfs_buf *bp) { xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC)); - bp->b_pre_io = xfs_dir2_leaf1_write_verify; - bp->b_iodone = NULL; - xfs_buf_ioend(bp, 0); } void -xfs_dir2_leafn_write_verify( +xfs_dir2_leafn_read_verify( struct xfs_buf *bp) { xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)); } void -xfs_dir2_leafn_read_verify( +xfs_dir2_leafn_write_verify( struct xfs_buf *bp) { xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)); - bp->b_pre_io = xfs_dir2_leafn_write_verify; - bp->b_iodone = NULL; - xfs_buf_ioend(bp, 0); } +static const struct xfs_buf_ops xfs_dir2_leaf1_buf_ops = { + .verify_read = xfs_dir2_leaf1_read_verify, + .verify_write = xfs_dir2_leaf1_write_verify, +}; + +const struct xfs_buf_ops xfs_dir2_leafn_buf_ops = { + .verify_read = xfs_dir2_leafn_read_verify, + .verify_write = xfs_dir2_leafn_write_verify, +}; + static int xfs_dir2_leaf_read( struct xfs_trans *tp, @@ -107,7 +111,7 @@ xfs_dir2_leaf_read( struct xfs_buf **bpp) { return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, - XFS_DATA_FORK, xfs_dir2_leaf1_read_verify); + XFS_DATA_FORK, &xfs_dir2_leaf1_buf_ops); } int @@ -119,7 +123,7 @@ xfs_dir2_leafn_read( struct xfs_buf **bpp) { return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, - XFS_DATA_FORK, xfs_dir2_leafn_read_verify); + XFS_DATA_FORK, &xfs_dir2_leafn_buf_ops); } /* @@ -198,7 +202,7 @@ xfs_dir2_block_to_leaf( /* * Fix up the block header, make it a data block. */ - dbp->b_pre_io = xfs_dir2_data_write_verify; + dbp->b_ops = &xfs_dir2_data_buf_ops; hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC); if (needscan) xfs_dir2_data_freescan(mp, hdr, &needlog); @@ -1264,12 +1268,12 @@ xfs_dir2_leaf_init( * the block. */ if (magic == XFS_DIR2_LEAF1_MAGIC) { - bp->b_pre_io = xfs_dir2_leaf1_write_verify; + bp->b_ops = &xfs_dir2_leaf1_buf_ops; ltp = xfs_dir2_leaf_tail_p(mp, leaf); ltp->bestcount = 0; xfs_dir2_leaf_log_tail(tp, bp); } else - bp->b_pre_io = xfs_dir2_leafn_write_verify; + bp->b_ops = &xfs_dir2_leafn_buf_ops; *bpp = bp; return 0; } @@ -1954,7 +1958,7 @@ xfs_dir2_node_to_leaf( else xfs_dir2_leaf_log_header(tp, lbp); - lbp->b_pre_io = xfs_dir2_leaf1_write_verify; + lbp->b_ops = &xfs_dir2_leaf1_buf_ops; leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC); /* -- cgit v1.2.3