[ostree] deploy: Drop fsync of modified config files

[Colin Walters <walters src gnome org>]

commit 45406bf8158bf76e242a8e521429dc67a482facf
Author: Colin Walters <walters verbum org>
Date:   Sun Apr 19 12:34:01 2015 -0400

    deploy: Drop fsync of modified config files
    
    These fsyncs were added for what turned out to be a fairly bogus
    reason; I was hitting read errors from extlinux after upgrades and out
    of conservatisim tried adding fsync calls, but the *actual* problem
    was that extlinux didn't support 64 bit ext4.  Now that at least for
    Project Atomic hosts we're just targeting grub2, we can drop these
    fsync calls and rely on `syncfs()` being both faster and catching any
    errors.

 libglnx                               |    2 +-
 src/libostree/ostree-sysroot-deploy.c |   35 ++++++++++----------------------
 2 files changed, 12 insertions(+), 25 deletions(-)
---
diff --git a/libglnx b/libglnx
index 381ca54..371172b 160000
--- a/libglnx
+++ b/libglnx
@@ -1 +1 @@
-Subproject commit 381ca54ee3a47de291d26a5db8772732fb4a9d59
+Subproject commit 371172bcfd869867cf1c2847fcbbb3aa22adddb6
diff --git a/src/libostree/ostree-sysroot-deploy.c b/src/libostree/ostree-sysroot-deploy.c
index 5501fb5..62ea6fa 100644
--- a/src/libostree/ostree-sysroot-deploy.c
+++ b/src/libostree/ostree-sysroot-deploy.c
@@ -79,11 +79,11 @@ dirfd_copy_attributes_and_xattrs (int            src_parent_dfd,
 }
 
 static gboolean
-copy_dir_recurse_fsync (int              src_parent_dfd,
-                        int              dest_parent_dfd,
-                        const char      *name,
-                        GCancellable    *cancellable,
-                        GError         **error)
+copy_dir_recurse (int              src_parent_dfd,
+                  int              dest_parent_dfd,
+                  const char      *name,
+                  GCancellable    *cancellable,
+                  GError         **error)
 {
   gboolean ret = FALSE;
   int src_dfd = -1;
@@ -133,26 +133,19 @@ copy_dir_recurse_fsync (int              src_parent_dfd,
 
       if (S_ISDIR (child_stbuf.st_mode))
         {
-          if (!copy_dir_recurse_fsync (src_dfd, dest_dfd, name,
-                                       cancellable, error))
+          if (!copy_dir_recurse (src_dfd, dest_dfd, name,
+                                 cancellable, error))
             goto out;
         }
       else
         {
           if (!glnx_file_copy_at (src_dfd, name, &child_stbuf, dest_dfd, name,
-                                  GLNX_FILE_COPY_OVERWRITE | GLNX_FILE_COPY_DATASYNC,
+                                  GLNX_FILE_COPY_OVERWRITE,
                                   cancellable, error))
             goto out;
         }
     }
 
-  /* And finally, fsync the fd */
-  if (fsync (dest_dfd) != 0)
-    {
-      gs_set_error_from_errno (error, errno);
-      goto out;
-    }
-
   ret = TRUE;
  out:
   if (srcd)
@@ -330,15 +323,15 @@ copy_modified_config_file (int                 orig_etc_fd,
 
   if (S_ISDIR (modified_stbuf.st_mode))
     {
-      if (!copy_dir_recurse_fsync (modified_etc_fd, new_etc_fd, path,
-                                   cancellable, error))
+      if (!copy_dir_recurse (modified_etc_fd, new_etc_fd, path,
+                             cancellable, error))
         goto out;
     }
   else if (S_ISLNK (modified_stbuf.st_mode) || S_ISREG (modified_stbuf.st_mode))
     {
       if (!glnx_file_copy_at (modified_etc_fd, path, &modified_stbuf, 
                               new_etc_fd, path,
-                              GLNX_FILE_COPY_OVERWRITE | GLNX_FILE_COPY_DATASYNC,
+                              GLNX_FILE_COPY_OVERWRITE,
                               cancellable, error))
         goto out;
     }
@@ -350,12 +343,6 @@ copy_modified_config_file (int                 orig_etc_fd,
       goto out;
     }
 
-  if (fsync (dest_parent_dfd) != 0)
-    {
-      gs_set_error_from_errno (error, errno);
-      goto out;
-    }
-
   ret = TRUE;
  out:
   if (dest_parent_dfd != -1)