From c234e34ad80801acd902c6d4892a7722fd084a87 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Wed, 15 Apr 2015 13:17:06 +0200
Subject: libdiskfs: implement a node cache

Previously, all users of libdiskfs implemented a node cache on their
own.  Move the node cache from ext2fs into libdiskfs.  We preserve the
previous API by marking all functions that we pull from ext2fs as
weak, so that users like tmpfs can still implement their own node
cache.

* ext2fs/dir.c (diskfs_lookup_hard): Adjust accordingly.
* ext2fs/ext2fs.c (main): Don't call `inode_init'.
* ext2fs/ext2fs.h (struct disknode): Drop `hnext', `hprevp'.
* ext2fs/inode.c: Move the node cache into diskfs.
(diskfs_user_make_node): New function.
(diskfs_try_dropping_softrefs): Rename to `diskfs_user_try_dropping_softrefs'.
(read_node): Rename to `diskfs_user_read_node'.  Also move a chunk of
code dealing with generations from `diskfs_cached_lookup' here.
* libdiskfs/Makefile (OTHERSRCS): Add `node-cache.c'.
* libdiskfs/diskfs.h (struct node): Add `hnext', `hprevp'.
Amend existing comments, add forward declarations.
* libdiskfs/node-cache.c: New file.
---
 libdiskfs/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libdiskfs/Makefile')

diff --git a/libdiskfs/Makefile b/libdiskfs/Makefile
index 996e86a0..47b93390 100644
--- a/libdiskfs/Makefile
+++ b/libdiskfs/Makefile
@@ -41,7 +41,7 @@ OTHERSRCS = conch-fetch.c conch-set.c dir-clear.c dir-init.c dir-renamed.c \
 	extern-inline.c \
 	node-create.c node-drop.c node-make.c node-rdwr.c node-update.c \
 	node-nref.c node-nput.c node-nrele.c node-nrefl.c node-nputl.c \
-	node-nrelel.c \
+	node-nrelel.c node-cache.c \
 	peropen-make.c peropen-rele.c protid-make.c protid-rele.c \
 	init-init.c init-startup.c init-first.c init-main.c \
 	rdwr-internal.c boot-start.c demuxer.c node-times.c shutdown.c \
-- 
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