Formerly trivfs.h.~8~

1 files changed, 20 insertions, 0 deletions

diff --git a/libtrivfs/trivfs.h b/libtrivfs/trivfs.h
index 1a75315e..6cec812f 100644
--- a/libtrivfs/trivfs.h
+++ b/libtrivfs/trivfs.h
@@ -40,6 +40,7 @@ struct trivfs_control
   struct port_info pi;
   int protidtypes;
   mach_port_t underlying;
+  struct pending_open *openshead, *openstail;
 };
 
 /* The user must define these variables. */
@@ -61,6 +62,25 @@ extern int trivfs_cntl_nporttypes;
    nothing.  */
 void trivfs_modify_stat (struct stat *);
 
+/* If this variable is set, it is called every time an open happens.
+   UIDS, GIDS, and FLAGS are from the open; CNTL identifies the
+   node being opened.  This call need not check permissions on the underlying
+   node.  If the open call should block, then return EWOULDBLOCK.  Other
+   errors are immediately reflected to the user.  If O_NONBLOCK 
+   is not set in FLAGS and EWOULDBLOCK is returned, then call 
+   trivfs_complete_open when all pending open requests for this 
+   file can complete. */
+error_t (*trivfs_check_open_hook) (struct trivfs_control *cntl,
+				   uid_t *uids, u_int nuids,
+				   gid_t *gids, u_int ngids,
+				   int flags);
+
+/* Call this after *trivfs_check_open_hook returns EWOULDBLOCK when
+   FLAGS did not include O_NONBLOCK.  CNTL identifies the node now
+   openable.  If MULTI is nonzero, then return all pending opens,
+   otherwise, return only one. */
+void trivfs_complete_open (struct trivfs_control *cntl, int multi);
+
 /* If this variable is set, it is called every time a new protid
    structure is created and initialized. */
 void (*trivfs_protid_create_hook) (struct trivfs_protid *);