diff options
author | Li Zefan <lizf@cn.fujitsu.com> | 2011-07-14 07:17:27 +0400 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2011-08-01 22:30:47 +0400 |
commit | 15de900d08bb132833c8622610ddb1be660a6018 (patch) | |
tree | e7004a2761220fcfa19b891e61e81bfcdada032c /fs | |
parent | b9c8300c2ac354d850159f301d5b3ead13854cdd (diff) | |
download | linux-15de900d08bb132833c8622610ddb1be660a6018.tar.xz |
Btrfs: remove remaining ref-cache code
Since commit f2a97a9dbd86eb1ef956bdf20e05c507b32beb96
("btrfs: remove all unused functions"), there's no extern functions
at all in ref-cache.c, so just remove the remaining dead code.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/btrfs/ref-cache.c | 68 | ||||
-rw-r--r-- | fs/btrfs/ref-cache.h | 52 |
2 files changed, 0 insertions, 120 deletions
diff --git a/fs/btrfs/ref-cache.c b/fs/btrfs/ref-cache.c deleted file mode 100644 index 82d569cb6267..000000000000 --- a/fs/btrfs/ref-cache.c +++ /dev/null @@ -1,68 +0,0 @@ -/* - * Copyright (C) 2008 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License v2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/sort.h> -#include "ctree.h" -#include "ref-cache.h" -#include "transaction.h" - -static struct rb_node *tree_insert(struct rb_root *root, u64 bytenr, - struct rb_node *node) -{ - struct rb_node **p = &root->rb_node; - struct rb_node *parent = NULL; - struct btrfs_leaf_ref *entry; - - while (*p) { - parent = *p; - entry = rb_entry(parent, struct btrfs_leaf_ref, rb_node); - - if (bytenr < entry->bytenr) - p = &(*p)->rb_left; - else if (bytenr > entry->bytenr) - p = &(*p)->rb_right; - else - return parent; - } - - entry = rb_entry(node, struct btrfs_leaf_ref, rb_node); - rb_link_node(node, parent, p); - rb_insert_color(node, root); - return NULL; -} - -static struct rb_node *tree_search(struct rb_root *root, u64 bytenr) -{ - struct rb_node *n = root->rb_node; - struct btrfs_leaf_ref *entry; - - while (n) { - entry = rb_entry(n, struct btrfs_leaf_ref, rb_node); - WARN_ON(!entry->in_tree); - - if (bytenr < entry->bytenr) - n = n->rb_left; - else if (bytenr > entry->bytenr) - n = n->rb_right; - else - return n; - } - return NULL; -} diff --git a/fs/btrfs/ref-cache.h b/fs/btrfs/ref-cache.h deleted file mode 100644 index 24f7001f6387..000000000000 --- a/fs/btrfs/ref-cache.h +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Copyright (C) 2008 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License v2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ -#ifndef __REFCACHE__ -#define __REFCACHE__ - -struct btrfs_extent_info { - /* bytenr and num_bytes find the extent in the extent allocation tree */ - u64 bytenr; - u64 num_bytes; - - /* objectid and offset find the back reference for the file */ - u64 objectid; - u64 offset; -}; - -struct btrfs_leaf_ref { - struct rb_node rb_node; - struct btrfs_leaf_ref_tree *tree; - int in_tree; - atomic_t usage; - - u64 root_gen; - u64 bytenr; - u64 owner; - u64 generation; - int nritems; - - struct list_head list; - struct btrfs_extent_info extents[]; -}; - -static inline size_t btrfs_leaf_ref_size(int nr_extents) -{ - return sizeof(struct btrfs_leaf_ref) + - sizeof(struct btrfs_extent_info) * nr_extents; -} -#endif |