Special case for DUP can be replaced by lookup to the attribute table,
where the dev_stripes is the right coefficient.
Signed-off-by: David Sterba <dste...@suse.com>
---
fs/btrfs/super.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6e196b8a0820..a813b582fa72 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1904,6 +1904,7 @@ static inline int btrfs_calc_avail_data_space(struct
btrfs_fs_info *fs_info,
u64 min_stripe_size;
int min_stripes = 1, num_stripes = 1;
int i = 0, nr_devices;
+ const struct btrfs_raid_attr *rattr;
/*
* We aren't under the device list lock, so this is racy-ish, but good
@@ -1927,6 +1928,8 @@ static inline int btrfs_calc_avail_data_space(struct
btrfs_fs_info *fs_info,
/* calc min stripe number for data space allocation */
type = btrfs_data_alloc_profile(fs_info);
+ rattr = &btrfs_raid_array[btrfs_bg_flags_to_raid_index(type)];
+ ASSERT(rattr);
if (type & BTRFS_BLOCK_GROUP_RAID0) {
min_stripes = 2;
num_stripes = nr_devices;
@@ -1938,10 +1941,8 @@ static inline int btrfs_calc_avail_data_space(struct
btrfs_fs_info *fs_info,
num_stripes = 4;
}
- if (type & BTRFS_BLOCK_GROUP_DUP)
- min_stripe_size = 2 * BTRFS_STRIPE_LEN;
- else
- min_stripe_size = BTRFS_STRIPE_LEN;
+ /* Adjust for more than 1 stripe per device */
+ min_stripe_size = rattr->dev_stripes * BTRFS_STRIPE_LEN;
rcu_read_lock();
list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) {
--
2.21.0
