[sheepdog] [PATCH] sheep: use available size for virtual node calculation

[MORITA Kazutaka]

f_bfree includes reserved space for filesystem.  On the other hand,
f_bavail is the actually available size and 'df' also uses this value.
f_bavail looks more appropriate for virutal node calculation.

Signed-off-by: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
---
 sheep/md.c    | 2 +-
 sheep/store.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sheep/md.c b/sheep/md.c
index dc243fd..6934850 100644
--- a/sheep/md.c
+++ b/sheep/md.c
@@ -238,7 +238,7 @@ static uint64_t get_path_free_size(char *path, uint64_t *used)
 		sd_eprintf("get disk %s space failed %m", path);
 		return 0;
 	}
-	size = (int64_t)fs.f_frsize * fs.f_bfree;
+	size = (int64_t)fs.f_frsize * fs.f_bavail;
 
 	if (!used)
 		goto out;
diff --git a/sheep/store.c b/sheep/store.c
index 6a773d1..4e218d8 100644
--- a/sheep/store.c
+++ b/sheep/store.c
@@ -318,7 +318,7 @@ int init_disk_space(const char *base_path)
 			ret = SD_RES_EIO;
 			goto out;
 		}
-		sys->disk_space = (uint64_t)fs.f_frsize * fs.f_bfree;
+		sys->disk_space = (uint64_t)fs.f_frsize * fs.f_bavail;
 	}
 
 	ret = set_node_space(sys->disk_space);
-- 
1.8.1.3.566.gaa39828