[PATCH 08/12] btrfs-progs: fix to use half the available space for DUP profile

[Naohiro Aota]

In the DUP profile, we can use only half of the space available in a device
extent. Fix the calculation of calc_size for it.

Signed-off-by: Naohiro Aota <naohiro.a...@wdc.com>
---
 kernel-shared/volumes.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel-shared/volumes.c b/kernel-shared/volumes.c
index 2a094eab4971..ed3015bf3e0c 100644
--- a/kernel-shared/volumes.c
+++ b/kernel-shared/volumes.c
@@ -1323,7 +1323,10 @@ again:
                }
                if (!looped && max_avail > 0) {
                        looped = 1;
-                       ctl.calc_size = max_avail;
+                       if (ctl.type & BTRFS_BLOCK_GROUP_DUP)
+                               ctl.calc_size = max_avail / 2;
+                       else
+                               ctl.calc_size = max_avail;
                        goto again;
                }
                return -ENOSPC;
-- 
2.31.1