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btrfs: remove unused function btrfs_insert_some_items()

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The function btrfs_insert_some_items() would not be called by any other functions,
so remove it.

Signed-off-by: Robin Dong <sanbai@taobao.com>
This commit is contained in:
Robin Dong 2012-09-29 02:07:46 -06:00 committed by Chris Mason
parent 44734ed1ca
commit 8d1a1317af
1 changed files with 0 additions and 143 deletions
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143
fs/btrfs/ctree.c
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@ -4401,149 +4401,6 @@ void btrfs_extend_item(struct btrfs_trans_handle *trans,
}
}
/*
* Given a key and some data, insert items into the tree.
* This does all the path init required, making room in the tree if needed.
* Returns the number of keys that were inserted.
*/
int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
int nr)
{
struct extent_buffer *leaf;
struct btrfs_item *item;
int ret = 0;
int slot;
int i;
u32 nritems;
u32 total_data = 0;
u32 total_size = 0;
unsigned int data_end;
struct btrfs_disk_key disk_key;
struct btrfs_key found_key;
struct btrfs_map_token token;
btrfs_init_map_token(&token);
for (i = 0; i < nr; i++) {
if (total_size + data_size[i] + sizeof(struct btrfs_item) >
BTRFS_LEAF_DATA_SIZE(root)) {
break;
nr = i;
}
total_data += data_size[i];
total_size += data_size[i] + sizeof(struct btrfs_item);
}
BUG_ON(nr == 0);
ret = btrfs_search_slot(trans, root, cpu_key, path, total_size, 1);
if (ret == 0)
return -EEXIST;
if (ret < 0)
goto out;
leaf = path->nodes[0];
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(root, leaf);
if (btrfs_leaf_free_space(root, leaf) < total_size) {
for (i = nr; i >= 0; i--) {
total_data -= data_size[i];
total_size -= data_size[i] + sizeof(struct btrfs_item);
if (total_size < btrfs_leaf_free_space(root, leaf))
break;
}
nr = i;
}
slot = path->slots[0];
BUG_ON(slot < 0);
if (slot != nritems) {
unsigned int old_data = btrfs_item_end_nr(leaf, slot);
item = btrfs_item_nr(leaf, slot);
btrfs_item_key_to_cpu(leaf, &found_key, slot);
/* figure out how many keys we can insert in here */
total_data = data_size[0];
for (i = 1; i < nr; i++) {
if (btrfs_comp_cpu_keys(&found_key, cpu_key + i) <= 0)
break;
total_data += data_size[i];
}
nr = i;
if (old_data < data_end) {
btrfs_print_leaf(root, leaf);
printk(KERN_CRIT "slot %d old_data %d data_end %d\n",
slot, old_data, data_end);
BUG_ON(1);
}
/*
* item0..itemN ... dataN.offset..dataN.size .. data0.size
*/
/* first correct the data pointers */
for (i = slot; i < nritems; i++) {
u32 ioff;
item = btrfs_item_nr(leaf, i);
ioff = btrfs_token_item_offset(leaf, item, &token);
btrfs_set_token_item_offset(leaf, item,
ioff - total_data, &token);
}
/* shift the items */
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr),
btrfs_item_nr_offset(slot),
(nritems - slot) * sizeof(struct btrfs_item));
/* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) +
data_end - total_data, btrfs_leaf_data(leaf) +
data_end, old_data - data_end);
data_end = old_data;
} else {
/*
* this sucks but it has to be done, if we are inserting at
* the end of the leaf only insert 1 of the items, since we
* have no way of knowing whats on the next leaf and we'd have
* to drop our current locks to figure it out
*/
nr = 1;
}
/* setup the item for the new data */
for (i = 0; i < nr; i++) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key + i);
btrfs_set_item_key(leaf, &disk_key, slot + i);
item = btrfs_item_nr(leaf, slot + i);
btrfs_set_token_item_offset(leaf, item,
data_end - data_size[i], &token);
data_end -= data_size[i];
btrfs_set_token_item_size(leaf, item, data_size[i], &token);
}
btrfs_set_header_nritems(leaf, nritems + nr);
btrfs_mark_buffer_dirty(leaf);
ret = 0;
if (slot == 0) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key);
fixup_low_keys(trans, root, path, &disk_key, 1);
}
if (btrfs_leaf_free_space(root, leaf) < 0) {
btrfs_print_leaf(root, leaf);
BUG();
}
out:
if (!ret)
ret = nr;
return ret;
}
/*
* this is a helper for btrfs_insert_empty_items, the main goal here is
* to save stack depth by doing the bulk of the work in a function