Invent path-based inode numbers

* procfs.h, procfs.c (procfs_make_ino): New function,
  invents an inode number by hashing the parent's and the name of an
  entry.  (procfs_lookup): Use it to assign an inode number to child
  nodes at lookup time.
* main.c (root_make_node): Assign an arbitrary inode number to
  the root directory.

1 files changed, 5 insertions, 0 deletions

diff --git a/procfs.h b/procfs.h
index 42eed0e2..4c9d828b 100644
--- a/procfs.h
+++ b/procfs.h
@@ -51,6 +51,11 @@ struct node *procfs_make_node (const struct procfs_node_ops *ops, void *hook);
 
 /* Interface for the libnetfs side. */
 
+/* Get the inode number which will be given to a child of NP named FILENAME.
+   This allows us to retreive them for readdir() without creating the
+   corresponding child nodes.  */
+ino64_t procfs_make_ino (struct node *np, const char *filename);
+
 error_t procfs_get_contents (struct node *np, void **data, size_t *data_len);
 error_t procfs_lookup (struct node *np, const char *name, struct node **npp);
 void procfs_cleanup (struct node *np);