mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 04:36:45 +07:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#include <linux/module.h>
|
|
#include "ctree.h"
|
|
#include "disk-io.h"
|
|
#include "transaction.h"
|
|
|
|
int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 objectid, u64 offset,
|
|
u64 num_blocks, u64 hint_block,
|
|
u64 *result)
|
|
{
|
|
struct btrfs_key ins;
|
|
int ret = 0;
|
|
struct btrfs_file_extent_item *item;
|
|
struct btrfs_key file_key;
|
|
struct btrfs_path path;
|
|
|
|
btrfs_init_path(&path);
|
|
ret = btrfs_alloc_extent(trans, root, num_blocks, hint_block,
|
|
(u64)-1, objectid, &ins);
|
|
BUG_ON(ret);
|
|
file_key.objectid = objectid;
|
|
file_key.offset = offset;
|
|
file_key.flags = 0;
|
|
btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
|
|
|
|
ret = btrfs_insert_empty_item(trans, root, &path, &file_key,
|
|
sizeof(*item));
|
|
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);
|
|
mark_buffer_dirty(path.nodes[0]);
|
|
*result = ins.objectid;
|
|
btrfs_release_path(root, &path);
|
|
return 0;
|
|
}
|
|
|
|
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid,
|
|
u64 blocknr, u64 num_blocks, int mod)
|
|
{
|
|
int ret;
|
|
struct btrfs_key file_key;
|
|
int ins_len = mod < 0 ? -1 : 0;
|
|
int cow = mod != 0;
|
|
|
|
file_key.objectid = objectid;
|
|
file_key.offset = blocknr;
|
|
file_key.flags = 0;
|
|
btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
|
|
ret = btrfs_search_slot(trans, root, &file_key, path, ins_len, cow);
|
|
return ret;
|
|
}
|