From 01ba43b873d9e91ba2e0341fe8cb7e89eaa41661 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Tue, 29 Oct 2013 22:11:52 +1100 Subject: xfs: vectorise encoding/decoding directory headers Conversion from on-disk structures to in-core header structures currently relies on magic number checks. If the magic number is wrong, but one of the supported values, we do the wrong thing with the encode/decode operation. Split these functions so that there are discrete operations for the specific directory format we are handling. In doing this, move all the header encode/decode functions to xfs_da_format.c as they are directly manipulating the on-disk format. It should be noted that all the growth in binary size is from xfs_da_format.c - the rest of the code actaully shrinks. text data bss dec hex filename 794490 96802 1096 892388 d9de4 fs/xfs/xfs.o.orig 792986 96802 1096 890884 d9804 fs/xfs/xfs.o.p1 792350 96802 1096 890248 d9588 fs/xfs/xfs.o.p2 789293 96802 1096 887191 d8997 fs/xfs/xfs.o.p3 789005 96802 1096 886903 d8997 fs/xfs/xfs.o.p4 789061 96802 1096 886959 d88af fs/xfs/xfs.o.p5 789733 96802 1096 887631 d8b4f fs/xfs/xfs.o.p6 791421 96802 1096 889319 d91e7 fs/xfs/xfs.o.p7 Signed-off-by: Dave Chinner Reviewed-by: Ben Myers Signed-off-by: Ben Myers --- fs/xfs/xfs_dir2.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'fs/xfs/xfs_dir2.h') diff --git a/fs/xfs/xfs_dir2.h b/fs/xfs/xfs_dir2.h index c5cad9d9239d..61195348f667 100644 --- a/fs/xfs/xfs_dir2.h +++ b/fs/xfs/xfs_dir2.h @@ -76,13 +76,26 @@ struct xfs_dir_ops { (*data_unused_p)(struct xfs_dir2_data_hdr *hdr); int (*leaf_hdr_size)(void); + void (*leaf_hdr_to_disk)(struct xfs_dir2_leaf *to, + struct xfs_dir3_icleaf_hdr *from); + void (*leaf_hdr_from_disk)(struct xfs_dir3_icleaf_hdr *to, + struct xfs_dir2_leaf *from); int (*leaf_max_ents)(struct xfs_mount *mp); struct xfs_dir2_leaf_entry * (*leaf_ents_p)(struct xfs_dir2_leaf *lp); int (*node_hdr_size)(void); + void (*node_hdr_to_disk)(struct xfs_da_intnode *to, + struct xfs_da3_icnode_hdr *from); + void (*node_hdr_from_disk)(struct xfs_da3_icnode_hdr *to, + struct xfs_da_intnode *from); struct xfs_da_node_entry * (*node_tree_p)(struct xfs_da_intnode *dap); + + void (*free_hdr_to_disk)(struct xfs_dir2_free *to, + struct xfs_dir3_icfree_hdr *from); + void (*free_hdr_from_disk)(struct xfs_dir3_icfree_hdr *to, + struct xfs_dir2_free *from); }; extern const struct xfs_dir_ops * -- cgit v1.2.3-58-ga151