snapshotctl: fsync after writing every 1MB buffer
Sync writes after every 1MB instead of flushing at the end.
Bug: 299011882
Test: Boot device off snapshots
Change-Id: If91168ec92c2b2995bdf296ea1c7d4c261b12411
Signed-off-by: Akilesh Kailash <akailash@google.com>
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index ebaca2d..0396a55 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -227,8 +227,12 @@
if (file_offset >= dev_sz) {
break;
}
+
+ if (fsync(cfd.get()) < 0) {
+ PLOG(ERROR) << "Fsync failed at offset: " << file_offset << " size: " << to_read;
+ return false;
+ }
}
- fsync(cfd.get());
return true;
}