linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2007 Oracle.  All rights reserved.

 */

​

#include <linux/bio.h>

#include <linux/slab.h>

#include <linux/pagemap.h>

#include <linux/highmem.h>

#include "ctree.h"

#include "disk-io.h"

#include "transaction.h"

#include "volumes.h"

#include "print-tree.h"

#include "compression.h"

​

#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \

                   sizeof(struct btrfs_item) * 2) / \

                  size) - 1))

​

#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \

                       PAGE_SIZE))

​

#define MAX_ORDERED_SUM_BYTES(fs_info) ((PAGE_SIZE - \

                   sizeof(struct btrfs_ordered_sum)) / \

                   sizeof(u32) * (fs_info)->sectorsize)

​

int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,

                 struct btrfs_root *root,

                 u64 objectid, u64 pos,

                 u64 disk_offset, u64 disk_num_bytes,

                 u64 num_bytes, u64 offset, u64 ram_bytes,

                 u8 compression, u8 encryption, u16 other_encoding)

{

    int ret = 0;

    struct btrfs_file_extent_item *item;

    struct btrfs_key file_key;

    struct btrfs_path *path;

    struct extent_buffer *leaf;

​

    path = btrfs_alloc_path();

    if (!path)

        return -ENOMEM;

    file_key.objectid = objectid;

    file_key.offset = pos;

    file_key.type = BTRFS_EXTENT_DATA_KEY;

​

    path->leave_spinning = 1;

    ret = btrfs_insert_empty_item(trans, root, path, &file_key,

                      sizeof(*item));

    if (ret < 0)

        goto out;

    BUG_ON(ret); /* Can't happen */

    leaf = path->nodes[0];

    item = btrfs_item_ptr(leaf, path->slots[0],

                  struct btrfs_file_extent_item);

    btrfs_set_file_extent_disk_bytenr(leaf, item, disk_offset);

    btrfs_set_file_extent_disk_num_bytes(leaf, item, disk_num_bytes);

    btrfs_set_file_extent_offset(leaf, item, offset);

    btrfs_set_file_extent_num_bytes(leaf, item, num_bytes);

    btrfs_set_file_extent_ram_bytes(leaf, item, ram_bytes);

    btrfs_set_file_extent_generation(leaf, item, trans->transid);

    btrfs_set_file_extent_type(leaf, item, BTRFS_FILE_EXTENT_REG);