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 #define BTRFS_RST_SUPP_BLOCK_GROUP_MASK    (BTRFS_BLOCK_GROUP_DUP |             \
  10                                             BTRFS_BLOCK_GROUP_RAID1_MASK |      \
  11                                             BTRFS_BLOCK_GROUP_RAID0 |           \
  12                                             BTRFS_BLOCK_GROUP_RAID10)
  13
  14 struct btrfs_io_context;
  15 struct btrfs_io_stripe;
  16 struct btrfs_ordered_extent;
  17 struct btrfs_trans_handle;
  18
  19 int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 length);
  20 int btrfs_get_raid_extent_offset(struct btrfs_fs_info *fs_info,
  21                                  u64 logical, u64 *length, u64 map_type,
  22                                  u32 stripe_index, struct btrfs_io_stripe *stripe);
  23 int btrfs_insert_raid_extent(struct btrfs_trans_handle *trans,
  24                              struct btrfs_ordered_extent *ordered_extent);
  25
  26 static inline bool btrfs_need_stripe_tree_update(struct btrfs_fs_info *fs_info,
  27                                                  u64 map_type)
  28 {
  29         u64 type = map_type & BTRFS_BLOCK_GROUP_TYPE_MASK;
  30         u64 profile = map_type & BTRFS_BLOCK_GROUP_PROFILE_MASK;
  31
  32         if (!btrfs_fs_incompat(fs_info, RAID_STRIPE_TREE))
  33                 return false;
  34
  35         if (type != BTRFS_BLOCK_GROUP_DATA)
  36                 return false;
  37
  38         if (profile & BTRFS_RST_SUPP_BLOCK_GROUP_MASK)
  39                 return true;
  40
  41         return false;
  42 }
  43
  44 static inline int btrfs_num_raid_stripes(u32 item_size)
  45 {
  46         return (item_size - offsetof(struct btrfs_stripe_extent, strides)) /
  47                 sizeof(struct btrfs_raid_stride);
  48 }
  49
  50 #endif