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Btrfs: Create extent_buffer interface for large blocksizes

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-10-15 16:14:19 -04:00
parent 50b78c24d5
commit 5f39d397df
22 changed files with 2814 additions and 2108 deletions
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61
fs/btrfs/transaction.c
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@@ -19,6 +19,7 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/writeback.h>
#include <linux/pagemap.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
@@ -66,7 +67,9 @@ static int join_transaction(struct btrfs_root *root)
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
init_bit_radix(&cur_trans->dirty_pages);
extent_map_tree_init(&cur_trans->dirty_pages,
root->fs_info->btree_inode->i_mapping,
GFP_NOFS);
} else {
cur_trans->num_writers++;
cur_trans->num_joined++;
@@ -88,7 +91,7 @@ static int record_root_in_trans(struct btrfs_root *root)
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_DEFRAG_TAG);
root->commit_root = root->node;
get_bh(root->node);
extent_buffer_get(root->node);
} else {
WARN_ON(1);
}
@@ -144,29 +147,30 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
unsigned long gang[16];
int ret;
int i;
int err;
int werr = 0;
struct extent_map_tree *dirty_pages;
struct page *page;
struct radix_tree_root *dirty_pages;
struct inode *btree_inode = root->fs_info->btree_inode;
u64 start;
u64 end;
unsigned long index;
if (!trans || !trans->transaction) {
return filemap_write_and_wait(btree_inode->i_mapping);
}
dirty_pages = &trans->transaction->dirty_pages;
while(1) {
ret = find_first_radix_bit(dirty_pages, gang,
0, ARRAY_SIZE(gang));
if (!ret)
ret = find_first_extent_bit(dirty_pages, 0, &start, &end,
EXTENT_DIRTY);
if (ret)
break;
for (i = 0; i < ret; i++) {
/* FIXME EIO */
clear_radix_bit(dirty_pages, gang[i]);
page = find_lock_page(btree_inode->i_mapping,
gang[i]);
clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
while(start <= end) {
index = start >> PAGE_CACHE_SHIFT;
start = (index + 1) << PAGE_CACHE_SHIFT;
page = find_lock_page(btree_inode->i_mapping, index);
if (!page)
continue;
if (PageWriteback(page)) {
@@ -202,10 +206,11 @@ int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
btrfs_write_dirty_block_groups(trans, extent_root);
while(1) {
old_extent_block = btrfs_root_blocknr(&extent_root->root_item);
if (old_extent_block == bh_blocknr(extent_root->node))
if (old_extent_block ==
extent_buffer_blocknr(extent_root->node))
break;
btrfs_set_root_blocknr(&extent_root->root_item,
bh_blocknr(extent_root->node));
extent_buffer_blocknr(extent_root->node));
ret = btrfs_update_root(trans, tree_root,
&extent_root->root_key,
&extent_root->root_item);
@@ -279,9 +284,9 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_TRANS_TAG);
if (root->commit_root == root->node) {
WARN_ON(bh_blocknr(root->node) !=
WARN_ON(extent_buffer_blocknr(root->node) !=
btrfs_root_blocknr(&root->root_item));
brelse(root->commit_root);
free_extent_buffer(root->commit_root);
root->commit_root = NULL;
/* make sure to update the root on disk
@@ -310,7 +315,7 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
root->root_key.offset = root->fs_info->generation;
btrfs_set_root_blocknr(&root->root_item,
bh_blocknr(root->node));
extent_buffer_blocknr(root->node));
err = btrfs_insert_root(trans, root->fs_info->tree_root,
&root->root_key,
&root->root_item);
@@ -389,10 +394,10 @@ int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info)
for (i = 0; i < ret; i++) {
root = gang[i];
last = root->root_key.objectid + 1;
btrfs_defrag_root(root, 1);
// btrfs_defrag_root(root, 1);
}
}
btrfs_defrag_root(info->extent_root, 1);
// btrfs_defrag_root(info->extent_root, 1);
return err;
}
@@ -414,7 +419,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
dirty = list_entry(list->next, struct dirty_root, list);
list_del_init(&dirty->list);
num_blocks = btrfs_root_blocks_used(&dirty->root->root_item);
num_blocks = btrfs_root_used(&dirty->root->root_item);
root = dirty->latest_root;
while(1) {
@@ -441,11 +446,11 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
}
BUG_ON(ret);
num_blocks -= btrfs_root_blocks_used(&dirty->root->root_item);
blocks_used = btrfs_root_blocks_used(&root->root_item);
num_blocks -= btrfs_root_used(&dirty->root->root_item);
blocks_used = btrfs_root_used(&root->root_item);
if (num_blocks) {
record_root_in_trans(root);
btrfs_set_root_blocks_used(&root->root_item,
btrfs_set_root_used(&root->root_item,
blocks_used - num_blocks);
}
ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
@@ -553,9 +558,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_set_super_generation(&root->fs_info->super_copy,
cur_trans->transid);
btrfs_set_super_root(&root->fs_info->super_copy,
bh_blocknr(root->fs_info->tree_root->node));
memcpy(root->fs_info->disk_super, &root->fs_info->super_copy,
sizeof(root->fs_info->super_copy));
extent_buffer_blocknr(root->fs_info->tree_root->node));
write_extent_buffer(root->fs_info->sb_buffer,
&root->fs_info->super_copy, 0,
sizeof(root->fs_info->super_copy));
btrfs_copy_pinned(root, &pinned_copy);