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Btrfs: Allow tree blocks larger than the page size

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-10-15 16:15:53 -04:00
parent 1a5bc167f6
commit db94535db7
15 changed files with 738 additions and 497 deletions
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39
fs/btrfs/transaction.c
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@@ -205,12 +205,13 @@ 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 ==
extent_buffer_blocknr(extent_root->node))
old_extent_block = btrfs_root_bytenr(&extent_root->root_item);
if (old_extent_block == extent_root->node->start)
break;
btrfs_set_root_blocknr(&extent_root->root_item,
extent_buffer_blocknr(extent_root->node));
btrfs_set_root_bytenr(&extent_root->root_item,
extent_root->node->start);
btrfs_set_root_level(&extent_root->root_item,
btrfs_header_level(extent_root->node));
ret = btrfs_update_root(trans, tree_root,
&extent_root->root_key,
&extent_root->root_item);
@@ -284,8 +285,8 @@ 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(extent_buffer_blocknr(root->node) !=
btrfs_root_blocknr(&root->root_item));
WARN_ON(root->node->start !=
btrfs_root_bytenr(&root->root_item));
free_extent_buffer(root->commit_root);
root->commit_root = NULL;
@@ -314,8 +315,10 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
root->commit_root = NULL;
root->root_key.offset = root->fs_info->generation;
btrfs_set_root_blocknr(&root->root_item,
extent_buffer_blocknr(root->node));
btrfs_set_root_bytenr(&root->root_item,
root->node->start);
btrfs_set_root_level(&root->root_item,
btrfs_header_level(root->node));
err = btrfs_insert_root(trans, root->fs_info->tree_root,
&root->root_key,
&root->root_item);
@@ -407,8 +410,8 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
unsigned long nr;
u64 num_blocks;
u64 blocks_used;
u64 num_bytes;
u64 bytes_used;
int ret = 0;
int err;
@@ -419,7 +422,7 @@ 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_used(&dirty->root->root_item);
num_bytes = btrfs_root_used(&dirty->root->root_item);
root = dirty->latest_root;
while(1) {
@@ -446,12 +449,12 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
}
BUG_ON(ret);
num_blocks -= btrfs_root_used(&dirty->root->root_item);
blocks_used = btrfs_root_used(&root->root_item);
if (num_blocks) {
num_bytes -= btrfs_root_used(&dirty->root->root_item);
bytes_used = btrfs_root_used(&root->root_item);
if (num_bytes) {
record_root_in_trans(root);
btrfs_set_root_used(&root->root_item,
blocks_used - num_blocks);
bytes_used - num_bytes);
}
ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
if (ret) {
@@ -560,7 +563,9 @@ 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,
extent_buffer_blocknr(root->fs_info->tree_root->node));
root->fs_info->tree_root->node->start);
btrfs_set_super_root_level(&root->fs_info->super_copy,
btrfs_header_level(root->fs_info->tree_root->node));
write_extent_buffer(root->fs_info->sb_buffer,
&root->fs_info->super_copy, 0,