From f39911e5527e8be7ab56cadde306237092bcc78f Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Tue, 3 Mar 2020 13:24:06 +0800 Subject: btrfs: backref: rename and move link_backref_edge() Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/backref.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'fs/btrfs/backref.h') diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h index 4f140a0ebe1c..01c559543133 100644 --- a/fs/btrfs/backref.h +++ b/fs/btrfs/backref.h @@ -275,4 +275,20 @@ struct btrfs_backref_node *btrfs_backref_alloc_node( struct btrfs_backref_edge *btrfs_backref_alloc_edge( struct btrfs_backref_cache *cache); +#define LINK_LOWER (1 << 0) +#define LINK_UPPER (1 << 1) +static inline void btrfs_backref_link_edge(struct btrfs_backref_edge *edge, + struct btrfs_backref_node *lower, + struct btrfs_backref_node *upper, + int link_which) +{ + ASSERT(upper && lower && upper->level == lower->level + 1); + edge->node[LOWER] = lower; + edge->node[UPPER] = upper; + if (link_which & LINK_LOWER) + list_add_tail(&edge->list[LOWER], &lower->upper); + if (link_which & LINK_UPPER) + list_add_tail(&edge->list[UPPER], &upper->lower); +} + #endif -- cgit v1.2.3-73-gaa49b