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authorChris Mason <chris.mason@oracle.com>2007-04-02 11:20:42 -0400
committerDavid Woodhouse <dwmw2@hera.kernel.org>2007-04-02 11:20:42 -0400
commit5caf2a002901f0fde475371c4bf1c553b51884af (patch)
tree1c262f723307fe924ea4e960761354f194f3843e /fs/btrfs/file-item.c
parent2c90e5d658424bc71b111eb5a972240d5d06fe86 (diff)
Btrfs: dynamic allocation of path struct
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/file-item.c')
-rw-r--r--fs/btrfs/file-item.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index c3992b7b0c6..e7510ac5559 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -13,9 +13,11 @@ int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
int ret = 0;
struct btrfs_file_extent_item *item;
struct btrfs_key file_key;
- struct btrfs_path path;
+ struct btrfs_path *path;
- btrfs_init_path(&path);
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+ btrfs_init_path(path);
ret = btrfs_alloc_extent(trans, root, num_blocks, hint_block,
(u64)-1, objectid, &ins);
BUG_ON(ret);
@@ -24,19 +26,20 @@ int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
- ret = btrfs_insert_empty_item(trans, root, &path, &file_key,
+ ret = btrfs_insert_empty_item(trans, root, path, &file_key,
sizeof(*item));
BUG_ON(ret);
- item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
+ item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_file_extent_item);
btrfs_set_file_extent_disk_blocknr(item, ins.objectid);
btrfs_set_file_extent_disk_num_blocks(item, ins.offset);
btrfs_set_file_extent_offset(item, 0);
btrfs_set_file_extent_num_blocks(item, ins.offset);
btrfs_set_file_extent_generation(item, trans->transid);
- btrfs_mark_buffer_dirty(path.nodes[0]);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
*result = ins.objectid;
- btrfs_release_path(root, &path);
+ btrfs_release_path(root, path);
+ btrfs_free_path(path);
return 0;
}
@@ -65,25 +68,28 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
{
int ret;
struct btrfs_key file_key;
- struct btrfs_path path;
+ struct btrfs_path *path;
struct btrfs_csum_item *item;
- btrfs_init_path(&path);
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+ btrfs_init_path(path);
file_key.objectid = objectid;
file_key.offset = offset;
file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
- ret = btrfs_insert_empty_item(trans, root, &path, &file_key,
+ ret = btrfs_insert_empty_item(trans, root, path, &file_key,
BTRFS_CSUM_SIZE);
if (ret != 0 && ret != -EEXIST)
goto fail;
- item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
+ item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_csum_item);
ret = 0;
ret = btrfs_csum_data(root, data, len, item->csum);
- btrfs_mark_buffer_dirty(path.nodes[0]);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
fail:
- btrfs_release_path(root, &path);
+ btrfs_release_path(root, path);
+ btrfs_free_path(path);
return ret;
}
@@ -93,19 +99,21 @@ int btrfs_csum_verify_file_block(struct btrfs_root *root,
{
int ret;
struct btrfs_key file_key;
- struct btrfs_path path;
+ struct btrfs_path *path;
struct btrfs_csum_item *item;
char result[BTRFS_CSUM_SIZE];
- btrfs_init_path(&path);
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+ btrfs_init_path(path);
file_key.objectid = objectid;
file_key.offset = offset;
file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
- ret = btrfs_search_slot(NULL, root, &file_key, &path, 0, 0);
+ ret = btrfs_search_slot(NULL, root, &file_key, path, 0, 0);
if (ret)
goto fail;
- item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0],
+ item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_csum_item);
ret = 0;
ret = btrfs_csum_data(root, data, len, result);
@@ -113,7 +121,8 @@ int btrfs_csum_verify_file_block(struct btrfs_root *root,
if (memcmp(result, item->csum, BTRFS_CSUM_SIZE))
ret = 1;
fail:
- btrfs_release_path(root, &path);
+ btrfs_release_path(root, path);
+ btrfs_free_path(path);
return ret;
}