[ostree] core: Don't checkout symbolic links via hardlink

[Colin Walters <walters src gnome org>]

commit 9582effb8d97e9885e2226205ab02437b51db230
Author: Colin Walters <walters verbum org>
Date:   Sat May 26 11:55:12 2012 -0400

    core: Don't checkout symbolic links via hardlink
    
    Doing so can easily get us up to the maximum ext4 hardlink count.

 src/libostree/ostree-repo.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index 2274588..a3ff556 100644
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -4179,6 +4179,17 @@ find_loose_for_checkout (OstreeRepo             *self,
             }
           self = self->parent_repo;
         }
+      else if (S_ISLNK (stbuf.st_mode))
+        {
+          /* Don't check out symbolic links via hardlink; it's very easy
+           * to hit the maximum number of hardlinks to an inode this way,
+           * especially since right now we have a lot of symbolic links to
+           * busybox.
+           *
+           * fs/ext4/ext4.h:#define EXT4_LINK_MAX		65000
+           */
+          self = self->parent_repo;
+        }
       else
         break;