fs/btrfs/raid-stripe-tree.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2023 Western Digital Corporation or its affiliates.
   4  */
   5
   6 #ifndef BTRFS_RAID_STRIPE_TREE_H
   7 #define BTRFS_RAID_STRIPE_TREE_H
   8
   9 #include <linux/types.h>
  10 #include <uapi/linux/btrfs_tree.h>
  11 #include "fs.h"
  12
  13 #define BTRFS_RST_SUPP_BLOCK_GROUP_MASK    (BTRFS_BLOCK_GROUP_DUP |             \
  14                                             BTRFS_BLOCK_GROUP_RAID1_MASK |      \
  15                                             BTRFS_BLOCK_GROUP_RAID0 |           \
  16                                             BTRFS_BLOCK_GROUP_RAID10)
  17
  18 struct btrfs_io_context;
  19 struct btrfs_io_stripe;
  20 struct btrfs_fs_info;
  21 struct btrfs_ordered_extent;
  22 struct btrfs_trans_handle;
  23
  24 int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 length);
  25 int btrfs_get_raid_extent_offset(struct btrfs_fs_info *fs_info,
  26                                  u64 logical, u64 *length, u64 map_type,
  27                                  u32 stripe_index, struct btrfs_io_stripe *stripe);
  28 int btrfs_insert_raid_extent(struct btrfs_trans_handle *trans,
  29                              struct btrfs_ordered_extent *ordered_extent);
  30
  31 static inline bool btrfs_need_stripe_tree_update(struct btrfs_fs_info *fs_info,
  32                                                  u64 map_type)
  33 {
  34         u64 type = map_type & BTRFS_BLOCK_GROUP_TYPE_MASK;
  35         u64 profile = map_type & BTRFS_BLOCK_GROUP_PROFILE_MASK;
  36
  37         if (!btrfs_fs_incompat(fs_info, RAID_STRIPE_TREE))
  38                 return false;
  39
  40         if (type != BTRFS_BLOCK_GROUP_DATA)
  41                 return false;
  42
  43         if (profile & BTRFS_RST_SUPP_BLOCK_GROUP_MASK)
  44                 return true;
  45
  46         return false;
  47 }
  48
  49 static inline int btrfs_num_raid_stripes(u32 item_size)
  50 {
  51         return (item_size - offsetof(struct btrfs_stripe_extent, strides)) /
  52                 sizeof(struct btrfs_raid_stride);
  53 }
  54
  55 #endif