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Btrfs-progs: break out rbtree util functions

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These were added to deal with duplicated functionality within btrfs-progs, but
we specifically copied rbtree.c from the kernel, so move these functions out
into their own file.  This will make it easier to keep rbtree.c in sync.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Josef Bacik 2014-10-10 16:57:08 -04:00 committed by David Sterba
parent d90d8d2323
commit cdb9e22e29
10 changed files with 133 additions and 86 deletions
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2
Makefile
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@ -10,7 +10,7 @@ objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
root-tree.o dir-item.o file-item.o inode-item.o inode-map.o \
extent-cache.o extent_io.o volumes.o utils.o repair.o \
qgroup.o raid6.o free-space-cache.o list_sort.o props.o \
ulist.o qgroup-verify.o backref.o
ulist.o qgroup-verify.o backref.o rbtree-utils.o
cmds_objects = cmds-subvolume.o cmds-filesystem.o cmds-device.o cmds-scrub.o \
cmds-inspect.o cmds-balance.o cmds-send.o cmds-receive.o \
cmds-quota.o cmds-qgroup.o cmds-replace.o cmds-check.o \

1
btrfs-list.c
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@ -33,6 +33,7 @@
#include "utils.h"
#include <uuid/uuid.h>
#include "btrfs-list.h"
#include "rbtree-utils.h"
#define BTRFS_LIST_NFILTERS_INCREASE (2 * BTRFS_LIST_FILTER_MAX)
#define BTRFS_LIST_NCOMPS_INCREASE (2 * BTRFS_LIST_COMP_MAX)

1
cmds-check.c
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@ -39,6 +39,7 @@
#include "free-space-cache.h"
#include "btrfsck.h"
#include "qgroup-verify.h"
#include "rbtree-utils.h"
static u64 bytes_used = 0;
static u64 total_csum_bytes = 0;

1
disk-io.c
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@ -34,6 +34,7 @@
#include "crc32c.h"
#include "utils.h"
#include "print-tree.h"
#include "rbtree-utils.h"
static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
{

1
extent-cache.c
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@ -19,6 +19,7 @@
#include <stdlib.h>
#include "kerncompat.h"
#include "extent-cache.h"
#include "rbtree-utils.h"
struct cache_extent_search_range {
u64 objectid;

1
qgroup-verify.c
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@ -28,6 +28,7 @@
#include "print-tree.h"
#include "utils.h"
#include "ulist.h"
#include "rbtree-utils.h"
#include "qgroup-verify.h"

82
rbtree-utils.c Normal file
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@ -0,0 +1,82 @@
/*
* Copyright (C) 2014 Facebook. 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 "rbtree-utils.h"
int rb_insert(struct rb_root *root, struct rb_node *node,
rb_compare_nodes comp)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
int ret;
while(*p) {
parent = *p;
ret = comp(parent, node);
if (ret < 0)
p = &(*p)->rb_left;
else if (ret > 0)
p = &(*p)->rb_right;
else
return -EEXIST;
}
rb_link_node(node, parent, p);
rb_insert_color(node, root);
return 0;
}
struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
struct rb_node **next_ret)
{
struct rb_node *n = root->rb_node;
struct rb_node *parent = NULL;
int ret = 0;
while(n) {
parent = n;
ret = comp(n, key);
if (ret < 0)
n = n->rb_left;
else if (ret > 0)
n = n->rb_right;
else
return n;
}
if (!next_ret)
return NULL;
if (parent && ret > 0)
parent = rb_next(parent);
*next_ret = parent;
return NULL;
}
void rb_free_nodes(struct rb_root *root, rb_free_node free_node)
{
struct rb_node *node;
while ((node = rb_first(root))) {
rb_erase(node, root);
free_node(node);
}
}

45
rbtree-utils.h Normal file
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@ -0,0 +1,45 @@
/*
* Copyright (C) 2014 Facebook. 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 __RBTREE_UTILS__
#define __RBTREE_UTILS__
#include "rbtree.h"
/* The common insert/search/free functions */
typedef int (*rb_compare_nodes)(struct rb_node *node1, struct rb_node *node2);
typedef int (*rb_compare_keys)(struct rb_node *node, void *key);
typedef void (*rb_free_node)(struct rb_node *node);
int rb_insert(struct rb_root *root, struct rb_node *node,
rb_compare_nodes comp);
/*
* In some cases, we need return the next node if we don't find the node we
* specify. At this time, we can use next_ret.
*/
struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
struct rb_node **next_ret);
void rb_free_nodes(struct rb_root *root, rb_free_node free_node);
#define FREE_RB_BASED_TREE(name, free_func) \
static void free_##name##_tree(struct rb_root *root) \
{ \
rb_free_nodes(root, free_func); \
}
#endif

63
rbtree.c
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@ -387,66 +387,3 @@ void rb_replace_node(struct rb_node *victim, struct rb_node *new,
/* Copy the pointers/colour from the victim to the replacement */
*new = *victim;
}
int rb_insert(struct rb_root *root, struct rb_node *node,
rb_compare_nodes comp)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
int ret;
while(*p) {
parent = *p;
ret = comp(parent, node);
if (ret < 0)
p = &(*p)->rb_left;
else if (ret > 0)
p = &(*p)->rb_right;
else
return -EEXIST;
}
rb_link_node(node, parent, p);
rb_insert_color(node, root);
return 0;
}
struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
struct rb_node **next_ret)
{
struct rb_node *n = root->rb_node;
struct rb_node *parent = NULL;
int ret = 0;
while(n) {
parent = n;
ret = comp(n, key);
if (ret < 0)
n = n->rb_left;
else if (ret > 0)
n = n->rb_right;
else
return n;
}
if (!next_ret)
return NULL;
if (parent && ret > 0)
parent = rb_next(parent);
*next_ret = parent;
return NULL;
}
void rb_free_nodes(struct rb_root *root, rb_free_node free_node)
{
struct rb_node *node;
while ((node = rb_first(root))) {
rb_erase(node, root);
free_node(node);
}
}

22
rbtree.h
View File

@ -157,26 +157,4 @@ static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
*rb_link = node;
}
/* The common insert/search/free functions */
typedef int (*rb_compare_nodes)(struct rb_node *node1, struct rb_node *node2);
typedef int (*rb_compare_keys)(struct rb_node *node, void *key);
typedef void (*rb_free_node)(struct rb_node *node);
int rb_insert(struct rb_root *root, struct rb_node *node,
rb_compare_nodes comp);
/*
* In some cases, we need return the next node if we don't find the node we
* specify. At this time, we can use next_ret.
*/
struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
struct rb_node **next_ret);
void rb_free_nodes(struct rb_root *root, rb_free_node free_node);
#define FREE_RB_BASED_TREE(name, free_func) \
static void free_##name##_tree(struct rb_root *root) \
{ \
rb_free_nodes(root, free_func); \
}
#endif /* _LINUX_RBTREE_H */