aboutsummaryrefslogtreecommitdiff
path: root/fs/btrfs/extent-tree.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r--fs/btrfs/extent-tree.c49
1 files changed, 30 insertions, 19 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 74bcd48a9c4..98a1c0faeda 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2118,6 +2118,15 @@ again:
return 0;
}
+int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len)
+{
+ maybe_lock_mutex(root);
+ set_extent_dirty(&root->fs_info->free_space_cache,
+ start, start + len - 1, GFP_NOFS);
+ maybe_unlock_mutex(root);
+ return 0;
+}
+
int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 num_bytes, u64 min_alloc_size,
@@ -2267,6 +2276,26 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
maybe_unlock_mutex(root);
return ret;
}
+
+struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 bytenr, u32 blocksize)
+{
+ struct extent_buffer *buf;
+
+ buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
+ if (!buf)
+ return ERR_PTR(-ENOMEM);
+ btrfs_set_header_generation(buf, trans->transid);
+ btrfs_tree_lock(buf);
+ clean_tree_block(trans, root, buf);
+ btrfs_set_buffer_uptodate(buf);
+ set_extent_dirty(&trans->transaction->dirty_pages, buf->start,
+ buf->start + buf->len - 1, GFP_NOFS);
+ trans->blocks_used++;
+ return buf;
+}
+
/*
* helper function to allocate a block for a given tree
* returns the tree buffer or NULL.
@@ -2293,26 +2322,8 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
BUG_ON(ret > 0);
return ERR_PTR(ret);
}
- buf = btrfs_find_create_tree_block(root, ins.objectid, blocksize);
- if (!buf) {
- btrfs_free_extent(trans, root, ins.objectid, blocksize,
- root->root_key.objectid, ref_generation,
- 0, 0, 0);
- return ERR_PTR(-ENOMEM);
- }
- btrfs_set_header_generation(buf, trans->transid);
- btrfs_tree_lock(buf);
- clean_tree_block(trans, root, buf);
- btrfs_set_buffer_uptodate(buf);
-
- if (PageDirty(buf->first_page)) {
- printk("page %lu dirty\n", buf->first_page->index);
- WARN_ON(1);
- }
- set_extent_dirty(&trans->transaction->dirty_pages, buf->start,
- buf->start + buf->len - 1, GFP_NOFS);
- trans->blocks_used++;
+ buf = btrfs_init_new_buffer(trans, root, ins.objectid, blocksize);
return buf;
}