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Remove the last radix tree (block_group_cache)

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This commit is contained in:
Chris Mason 2007-10-17 09:58:56 -04:00 committed by David Woodhouse
parent 167388ab2b
commit 678af9b3a4
5 changed files with 60 additions and 62 deletions
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2
Makefile
View File

@ -1,5 +1,5 @@
CC=gcc
CFLAGS = -g -Wall -fno-strict-aliasing -Werror
CFLAGS = -g -Wall -fno-strict-aliasing -Werror -D_FILE_OFFSET_BITS=64
objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
root-tree.o dir-item.o hash.o file-item.o inode-item.o \
inode-map.o crc32c.o rbtree.o extent-cache.o \

4
ctree.h
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@ -276,8 +276,10 @@ struct btrfs_block_group_item {
} __attribute__ ((__packed__));
struct btrfs_block_group_cache {
struct cache_extent cache;
struct btrfs_key key;
struct btrfs_block_group_item item;
int dirty;
};
struct btrfs_fs_info {
@ -286,7 +288,7 @@ struct btrfs_fs_info {
struct btrfs_root *tree_root;
struct btrfs_key last_insert;
struct cache_tree extent_cache;
struct radix_tree_root block_group_radix;
struct cache_tree block_group_cache;
struct cache_tree pending_tree;
struct cache_tree pinned_tree;
struct cache_tree del_pending;

2
disk-io.c
View File

@ -377,13 +377,13 @@ struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super)
struct btrfs_fs_info *fs_info = malloc(sizeof(*fs_info));
int ret;
INIT_RADIX_TREE(&fs_info->block_group_radix, GFP_KERNEL);
INIT_LIST_HEAD(&fs_info->trans);
INIT_LIST_HEAD(&fs_info->cache);
cache_tree_init(&fs_info->extent_cache);
cache_tree_init(&fs_info->pending_tree);
cache_tree_init(&fs_info->pinned_tree);
cache_tree_init(&fs_info->del_pending);
cache_tree_init(&fs_info->block_group_cache);
fs_info->cache_size = 0;
fs_info->fp = fp;
fs_info->running_transaction = NULL;

91
extent-tree.c
View File

@ -134,30 +134,29 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans,
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_block_group_cache *cache[8];
int ret;
struct btrfs_block_group_cache *bg;
struct cache_extent *cache;
int err = 0;
int werr = 0;
struct radix_tree_root *radix = &root->fs_info->block_group_radix;
int i;
struct cache_tree *bg_cache = &root->fs_info->block_group_cache;
struct btrfs_path path;
btrfs_init_path(&path);
u64 start = 0;
while(1) {
ret = radix_tree_gang_lookup_tag(radix, (void *)cache,
0, ARRAY_SIZE(cache),
BTRFS_BLOCK_GROUP_DIRTY);
if (!ret)
cache = find_first_cache_extent(bg_cache, start);
if (!cache)
break;
for (i = 0; i < ret; i++) {
radix_tree_tag_clear(radix, cache[i]->key.objectid +
cache[i]->key.offset -1,
BTRFS_BLOCK_GROUP_DIRTY);
bg = container_of(cache, struct btrfs_block_group_cache,
cache);
start = cache->start + cache->size;
if (bg->dirty) {
err = write_one_cache_group(trans, root,
&path, cache[i]);
&path, bg);
if (err)
werr = err;
}
bg->dirty = 0;
}
return werr;
}
@ -166,26 +165,25 @@ static int update_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num, int alloc)
{
struct btrfs_block_group_cache *cache;
struct btrfs_block_group_cache *bg;
struct cache_extent *cache;
struct btrfs_fs_info *info = root->fs_info;
u64 total = num;
u64 old_val;
u64 byte_in_group;
int ret;
while(total) {
ret = radix_tree_gang_lookup(&info->block_group_radix,
(void *)&cache, bytenr, 1);
if (!ret)
cache = find_first_cache_extent(&info->block_group_cache,
bytenr);
if (!cache)
return -1;
radix_tree_tag_set(&info->block_group_radix,
cache->key.objectid + cache->key.offset - 1,
BTRFS_BLOCK_GROUP_DIRTY);
byte_in_group = bytenr - cache->key.objectid;
old_val = btrfs_block_group_used(&cache->item);
if (total > cache->key.offset - byte_in_group)
num = cache->key.offset - byte_in_group;
bg = container_of(cache, struct btrfs_block_group_cache,
cache);
bg->dirty = 1;
byte_in_group = bytenr - bg->key.objectid;
old_val = btrfs_block_group_used(&bg->item);
if (total > bg->key.offset - byte_in_group)
num = bg->key.offset - byte_in_group;
else
num = total;
total -= num;
@ -194,7 +192,7 @@ static int update_block_group(struct btrfs_trans_handle *trans,
old_val += num;
else
old_val -= num;
btrfs_set_block_group_used(&cache->item, old_val);
btrfs_set_block_group_used(&bg->item, old_val);
}
return 0;
}
@ -688,22 +686,17 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
int btrfs_free_block_groups(struct btrfs_fs_info *info)
{
int ret;
struct btrfs_block_group_cache *cache[8];
int i;
struct btrfs_block_group_cache *bg;
struct cache_extent *cache;
while(1) {
ret = radix_tree_gang_lookup(&info->block_group_radix,
(void *)cache, 0,
ARRAY_SIZE(cache));
if (!ret)
cache = find_first_cache_extent(&info->block_group_cache, 0);
if (!cache)
break;
for (i = 0; i < ret; i++) {
radix_tree_delete(&info->block_group_radix,
cache[i]->key.objectid +
cache[i]->key.offset - 1);
free(cache[i]);
}
bg = container_of(cache, struct btrfs_block_group_cache,
cache);
remove_cache_extent(&info->block_group_cache, cache);
free(bg);
}
return 0;
}
@ -714,13 +707,15 @@ int btrfs_read_block_groups(struct btrfs_root *root)
int ret;
int err = 0;
struct btrfs_block_group_item *bi;
struct btrfs_block_group_cache *cache;
struct btrfs_block_group_cache *bg;
struct cache_tree *bg_cache;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_leaf *leaf;
u64 group_size = BTRFS_BLOCK_GROUP_SIZE;
root = root->fs_info->extent_root;
bg_cache = &root->fs_info->block_group_cache;
key.objectid = 0;
key.offset = group_size;
btrfs_set_key_type(&key, BTRFS_BLOCK_GROUP_ITEM_KEY);
@ -736,20 +731,20 @@ int btrfs_read_block_groups(struct btrfs_root *root)
leaf = &path.nodes[0]->leaf;
btrfs_disk_key_to_cpu(&found_key,
&leaf->items[path.slots[0]].key);
cache = malloc(sizeof(*cache));
if (!cache) {
bg = malloc(sizeof(*bg));
if (!bg) {
err = -1;
break;
}
bi = btrfs_item_ptr(leaf, path.slots[0],
struct btrfs_block_group_item);
memcpy(&cache->item, bi, sizeof(*bi));
memcpy(&cache->key, &found_key, sizeof(found_key));
memcpy(&bg->item, bi, sizeof(*bi));
memcpy(&bg->key, &found_key, sizeof(found_key));
key.objectid = found_key.objectid + found_key.offset;
btrfs_release_path(root, &path);
ret = radix_tree_insert(&root->fs_info->block_group_radix,
found_key.objectid +
found_key.offset - 1, (void *)cache);
bg->cache.start = found_key.objectid;
bg->cache.size = found_key.offset;
ret = insert_existing_cache_extent(bg_cache, &bg->cache);
BUG_ON(ret);
if (key.objectid >=
btrfs_super_total_bytes(root->fs_info->disk_super))

23
mkfs.c
View File

@ -28,7 +28,6 @@
#include <fcntl.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include "radix-tree.h"
#include <linux/fs.h>
#include "kerncompat.h"
#include "ctree.h"
@ -91,6 +90,7 @@ static int make_block_groups(struct btrfs_trans_handle *trans,
int ret;
u64 nr = 0;
struct btrfs_block_group_cache *cache;
struct cache_tree *bg_cache = &root->fs_info->block_group_cache;
root = root->fs_info->extent_root;
@ -99,13 +99,14 @@ static int make_block_groups(struct btrfs_trans_handle *trans,
cache = malloc(sizeof(*cache));
cache->key.objectid = 0;
cache->key.offset = group_size;
cache->cache.start = 0;
cache->cache.size = group_size;
btrfs_set_key_type(&cache->key, BTRFS_BLOCK_GROUP_ITEM_KEY);
memset(&cache->item, 0, sizeof(cache->item));
btrfs_set_block_group_used(&cache->item,
btrfs_super_bytes_used(root->fs_info->disk_super));
ret = radix_tree_insert(&root->fs_info->block_group_radix,
group_size - 1, (void *)cache);
ret = insert_existing_cache_extent(bg_cache, &cache->cache);
BUG_ON(ret);
total_bytes = btrfs_super_total_bytes(root->fs_info->disk_super);
@ -114,14 +115,14 @@ static int make_block_groups(struct btrfs_trans_handle *trans,
cache = malloc(sizeof(*cache));
cache->key.objectid = cur_start;
cache->key.offset = group_size;
cache->cache.start = cur_start;
cache->cache.size = group_size;
btrfs_set_key_type(&cache->key, BTRFS_BLOCK_GROUP_ITEM_KEY);
memset(&cache->item, 0, sizeof(cache->item));
if (nr % 3)
cache->item.flags |= BTRFS_BLOCK_GROUP_DATA;
ret = radix_tree_insert(&root->fs_info->block_group_radix,
cur_start + group_size - 1,
(void *)cache);
ret = insert_existing_cache_extent(bg_cache, &cache->cache);
BUG_ON(ret);
cur_start += group_size;
nr++;
@ -129,9 +130,11 @@ static int make_block_groups(struct btrfs_trans_handle *trans,
/* then insert all the items */
cur_start = 0;
while(cur_start < total_bytes) {
cache = radix_tree_lookup(&root->fs_info->block_group_radix,
cur_start + group_size - 1);
BUG_ON(!cache);
struct cache_extent *ce;
ce = find_first_cache_extent(bg_cache, cur_start);
BUG_ON(!ce);
cache = container_of(ce, struct btrfs_block_group_cache,
cache);
ret = btrfs_insert_block_group(trans, root, &cache->key,
&cache->item);
BUG_ON(ret);
@ -353,8 +356,6 @@ int main(int ac, char **av)
char *buf = malloc(sectorsize);
char *realpath_name;
radix_tree_init();
while(1) {
int c;
c = getopt(ac, av, "l:n:");