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Btrfs: Change the remaining radix trees used by extent-tree.c to extent_map trees 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-10-15 16:15:26 -04:00
parent 96b5179d0d
commit 1a5bc167f6
6 changed files with 94 additions and 138 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
fs/btrfs/ctree.h
View File

@ -283,10 +283,6 @@ struct btrfs_block_group_item {
struct btrfs_block_group_cache {
struct btrfs_key key;
struct btrfs_block_group_item item;
u64 first_free;
u64 last_alloc;
u64 pinned;
u64 last_prealloc;
int data;
int cached;
};
@ -296,11 +292,13 @@ struct btrfs_fs_info {
struct btrfs_root *extent_root;
struct btrfs_root *tree_root;
struct radix_tree_root fs_roots_radix;
struct radix_tree_root pending_del_radix;
struct radix_tree_root pinned_radix;
struct radix_tree_root extent_ins_radix;
struct extent_map_tree free_space_cache;
struct extent_map_tree block_group_cache;
struct extent_map_tree pinned_extents;
struct extent_map_tree pending_del;
struct extent_map_tree extent_ins;
u64 generation;
u64 last_trans_committed;
struct btrfs_transaction *running_transaction;
@ -926,7 +924,7 @@ static inline int btrfs_set_root_name(struct btrfs_root *root,
/* extent-tree.c */
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy);
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_map_tree *copy);
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
btrfs_fs_info *info,
u64 blocknr);
@ -949,7 +947,7 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
*root, u64 blocknr, u64 num_blocks, int pin);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct radix_tree_root *unpin_radix);
struct extent_map_tree *unpin);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 blocknr, u64 num_blocks);

9
fs/btrfs/disk-io.c
View File

@ -432,9 +432,6 @@ struct btrfs_root *open_ctree(struct super_block *sb)
err = -ENOMEM;
goto fail;
}
init_bit_radix(&fs_info->pinned_radix);
init_bit_radix(&fs_info->pending_del_radix);
init_bit_radix(&fs_info->extent_ins_radix);
INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_NOFS);
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
@ -458,6 +455,12 @@ struct btrfs_root *open_ctree(struct super_block *sb)
fs_info->btree_inode->i_mapping, GFP_NOFS);
extent_map_tree_init(&fs_info->block_group_cache,
fs_info->btree_inode->i_mapping, GFP_NOFS);
extent_map_tree_init(&fs_info->pinned_extents,
fs_info->btree_inode->i_mapping, GFP_NOFS);
extent_map_tree_init(&fs_info->pending_del,
fs_info->btree_inode->i_mapping, GFP_NOFS);
extent_map_tree_init(&fs_info->extent_ins,
fs_info->btree_inode->i_mapping, GFP_NOFS);
fs_info->do_barriers = 1;
fs_info->closing = 0;

193
fs/btrfs/extent-tree.c
View File

@ -188,13 +188,13 @@ again:
return start;
}
out:
return max(cache->last_alloc, search_start);
return search_start;
new_group:
cache = btrfs_lookup_block_group(root->fs_info,
last + cache->key.offset - 1);
if (!cache) {
return max((*cache_ret)->last_alloc, search_start);
return search_start;
}
cache = btrfs_find_block_group(root, cache,
last + cache->key.offset - 1, data, 0);
@ -247,16 +247,14 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
shint = btrfs_lookup_block_group(info, search_start);
if (shint && shint->data == data) {
used = btrfs_block_group_used(&shint->item);
if (used + shint->pinned <
div_factor(shint->key.offset, factor)) {
if (used < div_factor(shint->key.offset, factor)) {
return shint;
}
}
}
if (hint && hint->data == data) {
used = btrfs_block_group_used(&hint->item);
if (used + hint->pinned <
div_factor(hint->key.offset, factor)) {
if (used < div_factor(hint->key.offset, factor)) {
return hint;
}
last = hint->key.offset * 3;
@ -294,7 +292,7 @@ again:
else
free_check = div_factor(cache->key.offset, factor);
if (used + cache->pinned < free_check) {
if (used < free_check) {
found_group = cache;
goto found;
}
@ -505,8 +503,6 @@ fail:
return ret;
if (pending_ret)
return pending_ret;
if (cache->data)
cache->last_alloc = cache->first_free;
return 0;
}
@ -588,8 +584,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
old_val = btrfs_block_group_used(&cache->item);
num = min(total, cache->key.offset - block_in_group);
if (alloc) {
if (blocknr > cache->last_alloc)
cache->last_alloc = blocknr;
if (cache->data != data &&
old_val < (cache->key.offset >> 1)) {
int bit_to_clear;
@ -617,8 +611,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
old_val += num;
} else {
old_val -= num;
if (blocknr < cache->first_free)
cache->first_free = blocknr;
if (mark_free) {
set_extent_dirty(&info->free_space_cache,
blocknr, blocknr + num - 1,
@ -632,65 +624,47 @@ static int update_block_group(struct btrfs_trans_handle *trans,
return 0;
}
int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy)
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_map_tree *copy)
{
unsigned long gang[8];
u64 last = 0;
struct radix_tree_root *pinned_radix = &root->fs_info->pinned_radix;
u64 start;
u64 end;
struct extent_map_tree *pinned_extents = &root->fs_info->pinned_extents;
int ret;
int i;
while(1) {
ret = find_first_radix_bit(pinned_radix, gang, last,
ARRAY_SIZE(gang));
if (!ret)
ret = find_first_extent_bit(pinned_extents, last,
&start, &end, EXTENT_DIRTY);
if (ret)
break;
for (i = 0 ; i < ret; i++) {
set_radix_bit(copy, gang[i]);
last = gang[i] + 1;
}
set_extent_dirty(copy, start, end, GFP_NOFS);
last = end + 1;
}
ret = find_first_radix_bit(&root->fs_info->extent_ins_radix, gang, 0,
ARRAY_SIZE(gang));
WARN_ON(ret);
return 0;
}
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct radix_tree_root *unpin_radix)
struct extent_map_tree *unpin)
{
unsigned long gang[8];
struct btrfs_block_group_cache *block_group;
u64 first = 0;
u64 start;
u64 end;
int ret;
int i;
struct radix_tree_root *pinned_radix = &root->fs_info->pinned_radix;
struct extent_map_tree *pinned_extents = &root->fs_info->pinned_extents;
struct extent_map_tree *free_space_cache;
free_space_cache = &root->fs_info->free_space_cache;
while(1) {
ret = find_first_radix_bit(unpin_radix, gang, 0,
ARRAY_SIZE(gang));
if (!ret)
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY);
if (ret)
break;
if (!first)
first = gang[0];
for (i = 0; i < ret; i++) {
clear_radix_bit(pinned_radix, gang[i]);
clear_radix_bit(unpin_radix, gang[i]);
block_group = btrfs_lookup_block_group(root->fs_info,
gang[i]);
if (block_group) {
WARN_ON(block_group->pinned == 0);
block_group->pinned--;
if (gang[i] < block_group->last_alloc)
block_group->last_alloc = gang[i];
set_extent_dirty(free_space_cache,
gang[i], gang[i], GFP_NOFS);
}
}
clear_extent_dirty(pinned_extents, start, end,
GFP_NOFS);
clear_extent_dirty(unpin, start, end, GFP_NOFS);
set_extent_dirty(free_space_cache, start, end, GFP_NOFS);
}
return 0;
}
@ -700,39 +674,36 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, struct
{
struct btrfs_key ins;
struct btrfs_extent_item extent_item;
int i;
int ret;
int err;
unsigned long gang[8];
int err = 0;
u64 start;
u64 end;
struct btrfs_fs_info *info = extent_root->fs_info;
btrfs_set_stack_extent_refs(&extent_item, 1);
ins.offset = 1;
btrfs_set_key_type(&ins, BTRFS_EXTENT_ITEM_KEY);
btrfs_set_stack_extent_owner(&extent_item,
extent_root->root_key.objectid);
while(1) {
ret = find_first_radix_bit(&info->extent_ins_radix, gang, 0,
ARRAY_SIZE(gang));
if (!ret)
ret = find_first_extent_bit(&info->extent_ins, 0, &start,
&end, EXTENT_LOCKED);
if (ret)
break;
for (i = 0; i < ret; i++) {
ins.objectid = gang[i];
err = btrfs_insert_item(trans, extent_root, &ins,
&extent_item,
sizeof(extent_item));
clear_radix_bit(&info->extent_ins_radix, gang[i]);
WARN_ON(err);
}
ins.objectid = start;
ins.offset = end + 1 - start;
err = btrfs_insert_item(trans, extent_root, &ins,
&extent_item, sizeof(extent_item));
clear_extent_bits(&info->extent_ins, start, end, EXTENT_LOCKED,
GFP_NOFS);
}
return 0;
}
static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
{
int err;
int err = 0;
struct extent_buffer *buf;
if (!pending) {
@ -748,16 +719,11 @@ static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending)
}
free_extent_buffer(buf);
}
err = set_radix_bit(&root->fs_info->pinned_radix, blocknr);
if (!err) {
struct btrfs_block_group_cache *cache;
cache = btrfs_lookup_block_group(root->fs_info,
blocknr);
if (cache)
cache->pinned++;
}
set_extent_dirty(&root->fs_info->pinned_extents,
blocknr, blocknr, GFP_NOFS);
} else {
err = set_radix_bit(&root->fs_info->pending_del_radix, blocknr);
set_extent_bits(&root->fs_info->pending_del,
blocknr, blocknr, EXTENT_LOCKED, GFP_NOFS);
}
BUG_ON(err < 0);
return 0;
@ -840,43 +806,28 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct
btrfs_root *extent_root)
{
int ret;
int wret;
int err = 0;
unsigned long gang[4];
int i;
struct radix_tree_root *pending_radix;
struct radix_tree_root *pinned_radix;
struct btrfs_block_group_cache *cache;
u64 start;
u64 end;
struct extent_map_tree *pending_del;
struct extent_map_tree *pinned_extents;
pending_radix = &extent_root->fs_info->pending_del_radix;
pinned_radix = &extent_root->fs_info->pinned_radix;
pending_del = &extent_root->fs_info->pending_del;
pinned_extents = &extent_root->fs_info->pinned_extents;
while(1) {
ret = find_first_radix_bit(pending_radix, gang, 0,
ARRAY_SIZE(gang));
if (!ret)
ret = find_first_extent_bit(pending_del, 0, &start, &end,
EXTENT_LOCKED);
if (ret)
break;
for (i = 0; i < ret; i++) {
wret = set_radix_bit(pinned_radix, gang[i]);
if (wret == 0) {
cache =
btrfs_lookup_block_group(extent_root->fs_info,
gang[i]);
if (cache)
cache->pinned++;
}
if (wret < 0) {
printk(KERN_CRIT "set_radix_bit, err %d\n",
wret);
BUG_ON(wret < 0);
}
wret = clear_radix_bit(pending_radix, gang[i]);
BUG_ON(wret);
wret = __free_extent(trans, extent_root,
gang[i], 1, 0, 0);
if (wret)
err = wret;
}
set_extent_dirty(pinned_extents, start, end, GFP_NOFS);
clear_extent_bits(pending_del, start, end, EXTENT_LOCKED,
GFP_NOFS);
ret = __free_extent(trans, extent_root,
start, end + 1 - start, 0, 0);
if (ret)
err = ret;
}
return err;
}
@ -920,7 +871,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
u64 hole_size = 0;
int slot = 0;
u64 last_block = 0;
u64 test_block;
u64 orig_search_start = search_start;
int start_found;
struct extent_buffer *l;
@ -1059,13 +1009,15 @@ check_pending:
if (ins->objectid + num_blocks >= search_end)
goto enospc;
for (test_block = ins->objectid;
test_block < ins->objectid + num_blocks; test_block++) {
if (test_radix_bit(&info->pinned_radix, test_block) ||
test_radix_bit(&info->extent_ins_radix, test_block)) {
search_start = test_block + 1;
goto new_group;
}
if (test_range_bit(&info->extent_ins, ins->objectid,
ins->objectid + num_blocks -1, EXTENT_LOCKED, 0)) {
search_start = ins->objectid + num_blocks;
goto new_group;
}
if (test_range_bit(&info->pinned_extents, ins->objectid,
ins->objectid + num_blocks -1, EXTENT_DIRTY, 0)) {
search_start = ins->objectid + num_blocks;
goto new_group;
}
if (exclude_nr > 0 && (ins->objectid + num_blocks > exclude_start &&
ins->objectid < exclude_start + exclude_nr)) {
@ -1156,7 +1108,9 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
if (root == extent_root) {
BUG_ON(num_blocks != 1);
set_radix_bit(&root->fs_info->extent_ins_radix, ins->objectid);
set_extent_bits(&root->fs_info->extent_ins, ins->objectid,
ins->objectid + ins->offset - 1,
EXTENT_LOCKED, GFP_NOFS);
goto update_block;
}
@ -1557,9 +1511,6 @@ int btrfs_read_block_groups(struct btrfs_root *root)
btrfs_item_ptr_offset(leaf, path->slots[0]),
sizeof(cache->item));
memcpy(&cache->key, &found_key, sizeof(found_key));
cache->last_alloc = cache->key.objectid;
cache->first_free = cache->key.objectid;
cache->pinned = 0;
cache->cached = 0;
key.objectid = found_key.objectid + found_key.offset;

5
fs/btrfs/extent_map.c
View File

@ -1188,8 +1188,8 @@ out:
* has the bits set. Otherwise, 1 is returned if any bit in the
* range is found set.
*/
static int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end,
int bits, int filled)
int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end,
int bits, int filled)
{
struct extent_state *state = NULL;
struct rb_node *node;
@ -1222,6 +1222,7 @@ static int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end,
read_unlock_irq(&tree->lock);
return bitset;
}
EXPORT_SYMBOL(test_range_bit);
/*
* helper function to set a given page up to date if all the

4
fs/btrfs/extent_map.h
View File

@ -95,7 +95,9 @@ int extent_read_full_page(struct extent_map_tree *tree, struct page *page,
get_extent_t *get_extent);
void __init extent_map_init(void);
void __exit extent_map_exit(void);
int extent_clean_all_trees(struct extent_map_tree *tree);
int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end,
int bits, int filled);
int clear_extent_bits(struct extent_map_tree *tree, u64 start, u64 end,
int bits, gfp_t mask);
int set_extent_bits(struct extent_map_tree *tree, u64 start, u64 end,

5
fs/btrfs/transaction.c
View File

@ -481,11 +481,12 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_transaction *cur_trans;
struct btrfs_transaction *prev_trans = NULL;
struct list_head dirty_fs_roots;
struct radix_tree_root pinned_copy;
struct extent_map_tree pinned_copy;
DEFINE_WAIT(wait);
int ret;
init_bit_radix(&pinned_copy);
extent_map_tree_init(&pinned_copy,
root->fs_info->btree_inode->i_mapping, GFP_NOFS);
INIT_LIST_HEAD(&dirty_fs_roots);
mutex_lock(&root->fs_info->trans_mutex);