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Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r--fs/btrfs/ctree.c56
1 files changed, 16 insertions, 40 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index d1c56c94dd5a..f6ba165d3f81 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -45,9 +45,7 @@ static int tree_mod_log_free_eb(struct btrfs_fs_info *fs_info,
struct btrfs_path *btrfs_alloc_path(void)
{
- struct btrfs_path *path;
- path = kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
- return path;
+ return kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
}
/*
@@ -1102,7 +1100,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
int level, ret;
int last_ref = 0;
int unlock_orig = 0;
- u64 parent_start;
+ u64 parent_start = 0;
if (*cow_ret == buf)
unlock_orig = 1;
@@ -1121,13 +1119,8 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
else
btrfs_node_key(buf, &disk_key, 0);
- if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) {
- if (parent)
- parent_start = parent->start;
- else
- parent_start = 0;
- } else
- parent_start = 0;
+ if ((root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) && parent)
+ parent_start = parent->start;
cow = btrfs_alloc_tree_block(trans, root, parent_start,
root->root_key.objectid, &disk_key, level,
@@ -1170,8 +1163,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||
btrfs_header_backref_rev(buf) < BTRFS_MIXED_BACKREF_REV)
parent_start = buf->start;
- else
- parent_start = 0;
extent_buffer_get(cow);
tree_mod_log_set_root_pointer(root, cow, 1);
@@ -1182,11 +1173,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
free_extent_buffer(buf);
add_root_to_dirty_list(root);
} else {
- if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
- parent_start = parent->start;
- else
- parent_start = 0;
-
WARN_ON(trans->transid != btrfs_header_generation(parent));
tree_mod_log_insert_key(root->fs_info, parent, parent_slot,
MOD_LOG_KEY_REPLACE, GFP_NOFS);
@@ -1729,20 +1715,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
return err;
}
-/*
- * The leaf data grows from end-to-front in the node.
- * this returns the address of the start of the last item,
- * which is the stop of the leaf data stack
- */
-static inline unsigned int leaf_data_end(struct btrfs_root *root,
- struct extent_buffer *leaf)
-{
- u32 nr = btrfs_header_nritems(leaf);
- if (nr == 0)
- return BTRFS_LEAF_DATA_SIZE(root);
- return btrfs_item_offset_nr(leaf, nr - 1);
-}
-
/*
* search for key in the extent_buffer. The items start at offset p,
@@ -2268,7 +2240,6 @@ static void reada_for_search(struct btrfs_root *root,
u64 search;
u64 target;
u64 nread = 0;
- u64 gen;
struct extent_buffer *eb;
u32 nr;
u32 blocksize;
@@ -2313,7 +2284,6 @@ static void reada_for_search(struct btrfs_root *root,
search = btrfs_node_blockptr(node, nr);
if ((search <= target && target - search <= 65536) ||
(search > target && search - target <= 65536)) {
- gen = btrfs_node_ptr_generation(node, nr);
readahead_tree_block(root, search);
nread += blocksize;
}
@@ -4341,7 +4311,11 @@ again:
if (path->slots[1] == 0)
fixup_low_keys(fs_info, path, &disk_key, 1);
}
- btrfs_mark_buffer_dirty(right);
+ /*
+ * We create a new leaf 'right' for the required ins_len and
+ * we'll do btrfs_mark_buffer_dirty() on this leaf after copying
+ * the content of ins_len to 'right'.
+ */
return ret;
}
@@ -4772,8 +4746,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
if (btrfs_leaf_free_space(root, leaf) < total_size) {
btrfs_print_leaf(root, leaf);
- btrfs_crit(root->fs_info, "not enough freespace need %u have %d",
- total_size, btrfs_leaf_free_space(root, leaf));
+ btrfs_crit(root->fs_info,
+ "not enough freespace need %u have %d",
+ total_size, btrfs_leaf_free_space(root, leaf));
BUG();
}
@@ -4782,8 +4757,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
if (old_data < data_end) {
btrfs_print_leaf(root, leaf);
- btrfs_crit(root->fs_info, "slot %d old_data %d data_end %d",
- slot, old_data, data_end);
+ btrfs_crit(root->fs_info,
+ "slot %d old_data %d data_end %d",
+ slot, old_data, data_end);
BUG_ON(1);
}
/*
@@ -4793,7 +4769,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
for (i = slot; i < nritems; i++) {
u32 ioff;
- item = btrfs_item_nr( i);
+ item = btrfs_item_nr(i);
ioff = btrfs_token_item_offset(leaf, item, &token);
btrfs_set_token_item_offset(leaf, item,
ioff - total_data, &token);