From 9ddc4f2a1717455e50eb6fd010cda4e5f4080c42 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Mon, 31 Oct 2016 19:18:41 +0100 Subject: libdiskfs: Factorize code for last hard reference being released * libdiskfs/node-lastref.c: New file * libdiskfs/Makefile (OTHERSRCS): Add node-lastref.c * libdiskfs/libdiskfs/node-nput.c (diskfs_nput): Replace last hard reference code with a call to _diskfs_lastref. * libdiskfs/node-nrele.c (diskfs_nrele): Likewise. --- libdiskfs/node-lastref.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 libdiskfs/node-lastref.c (limited to 'libdiskfs/node-lastref.c') diff --git a/libdiskfs/node-lastref.c b/libdiskfs/node-lastref.c new file mode 100644 index 00000000..068566a2 --- /dev/null +++ b/libdiskfs/node-lastref.c @@ -0,0 +1,49 @@ +/* + Copyright (C) 1999 Free Software Foundation, Inc. + Written by Thomas Bushnell, BSG. + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + +#include "priv.h" + +/* Called when the last hard reference is released. If there are no + links, then request soft references to be dropped. */ +void +_diskfs_lastref (struct node *np) +{ + /* This is our cue that something akin to "last process closes file" + in the POSIX.1 sense happened, so make sure any pending node time + updates now happen in a timely fashion. */ + diskfs_set_node_times (np); + diskfs_lost_hardrefs (np); + if (!np->dn_stat.st_nlink) + { + if (np->sockaddr != MACH_PORT_NULL) + { + mach_port_deallocate (mach_task_self (), np->sockaddr); + np->sockaddr = MACH_PORT_NULL; + } + + /* There are no links. If there are soft references that + can be dropped, we can't let them postpone deallocation. + So attempt to drop them. But that's a user-supplied + routine, which might result in further recursive calls to + the ref-counting system. This is not a problem, as we + hold a weak reference ourselves. */ + diskfs_try_dropping_softrefs (np); + } +} -- cgit v1.2.3