Don't rely on st_blocks

It doesn't seem very reliable on ZFS.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index f736016797..a166f4ee24 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -690,9 +690,8 @@ void LocalStore::removeUnusedLinks(const GCState & state)
             throw SysError(format("statting '%1%'") % path);
 
         if (st.st_nlink != 1) {
-            unsigned long long size = st.st_blocks * 512ULL;
-            actualSize += size;
-            unsharedSize += (st.st_nlink - 1) * size;
+            actualSize += st.st_size;
+            unsharedSize += (st.st_nlink - 1) * st.st_size;
             continue;
         }
 
@@ -701,7 +700,7 @@ void LocalStore::removeUnusedLinks(const GCState & state)
         if (unlink(path.c_str()) == -1)
             throw SysError(format("deleting '%1%'") % path);
 
-        state.results.bytesFreed += st.st_blocks * 512ULL;
+        state.results.bytesFreed += st.st_size;
     }
 
     struct stat st;