Btrfs progs v4.16

[platform/upstream/btrfs-progs.git] / volumes.h

diff --git a/volumes.h b/volumes.h
index d5bb5f8..5bcaae7 100644 (file)
--- a/volumes.h
+++ b/volumes.h
@@ -108,6 +108,36 @@ struct map_lookup {
        struct btrfs_bio_stripe stripes[];
 };
 
+struct btrfs_raid_attr {
+       int sub_stripes;        /* sub_stripes info for map */
+       int dev_stripes;        /* stripes per dev */
+       int devs_max;           /* max devs to use */
+       int devs_min;           /* min devs needed */
+       int tolerated_failures; /* max tolerated fail devs */
+       int devs_increment;     /* ndevs has to be a multiple of this */
+       int ncopies;            /* how many copies to data has */
+};
+
+extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
+
+static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
+{
+       if (flags & BTRFS_BLOCK_GROUP_RAID10)
+               return BTRFS_RAID_RAID10;
+       else if (flags & BTRFS_BLOCK_GROUP_RAID1)
+               return BTRFS_RAID_RAID1;
+       else if (flags & BTRFS_BLOCK_GROUP_DUP)
+               return BTRFS_RAID_DUP;
+       else if (flags & BTRFS_BLOCK_GROUP_RAID0)
+               return BTRFS_RAID_RAID0;
+       else if (flags & BTRFS_BLOCK_GROUP_RAID5)
+               return BTRFS_RAID_RAID5;
+       else if (flags & BTRFS_BLOCK_GROUP_RAID6)
+               return BTRFS_RAID_RAID6;
+
+       return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */
+}
+
 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
                            (sizeof(struct btrfs_bio_stripe) * (n)))
 #define btrfs_map_lookup_size(n) (sizeof(struct map_lookup) + \
@@ -179,6 +209,28 @@ static inline int check_crossing_stripes(struct btrfs_fs_info *fs_info,
                (bg_offset + len - 1) / BTRFS_STRIPE_LEN);
 }
 
+static inline u64 calc_stripe_length(u64 type, u64 length, int num_stripes)
+{
+       u64 stripe_size;
+
+       if (type & BTRFS_BLOCK_GROUP_RAID0) {
+               stripe_size = length;
+               stripe_size /= num_stripes;
+       } else if (type & BTRFS_BLOCK_GROUP_RAID10) {
+               stripe_size = length * 2;
+               stripe_size /= num_stripes;
+       } else if (type & BTRFS_BLOCK_GROUP_RAID5) {
+               stripe_size = length;
+               stripe_size /= (num_stripes - 1);
+       } else if (type & BTRFS_BLOCK_GROUP_RAID6) {
+               stripe_size = length;
+               stripe_size /= (num_stripes - 2);
+       } else {
+               stripe_size = length;
+       }
+       return stripe_size;
+}
+
 int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
                      u64 logical, u64 *length, u64 *type,
                      struct btrfs_multi_bio **multi_ret, int mirror_num,
@@ -248,4 +300,5 @@ u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
 int btrfs_fix_device_size(struct btrfs_fs_info *fs_info,
                          struct btrfs_device *device);
 int btrfs_fix_super_size(struct btrfs_fs_info *fs_info);
+int btrfs_fix_device_and_super_size(struct btrfs_fs_info *fs_info);
 #endif