From c6c770c33eb0f23e7e8e04976c711653cdf1a41d Mon Sep 17 00:00:00 2001 From: Jeremie Koenig Date: Thu, 19 Aug 2010 07:48:30 +0000 Subject: Implement lookup for . and .. * procfs.c (procfs_lookup): Keep track of the parent directory, implement the lookup of the dot-directories. (procfs_cleanup): Release the reference to the parent node, if applicable. * procfs.h: Add a comment about the parent reference. * netfs.c (netfs_attempt_lookup): Lock the looked up node after the directory has been unlocked, in case they are the same. --- procfs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'procfs.h') diff --git a/procfs.h b/procfs.h index b44db6e..42eed0e 100644 --- a/procfs.h +++ b/procfs.h @@ -22,7 +22,10 @@ struct procfs_node_ops /* Lookup NAME in this directory, and store the result in *np. The returned node should be created by lookup() using procfs_make_node() - or a derived function. */ + or a derived function. Note that the parent will be kept alive as + long as the child exists, so you can safely reference the parent's + data from the child. You may want to consider locking if there's + any mutation going on, though. */ error_t (*lookup) (void *hook, const char *name, struct node **np); /* Destroy this node. */ -- cgit v1.2.3