From 6f4426fb7cc3ed01ad6a1e752f4ed96b98cb0525 Mon Sep 17 00:00:00 2001 From: Joan Lledó Date: Fri, 24 Dec 2021 18:21:33 +0100 Subject: libnetfs: new user callback: netfs_get_filemap() Provide the user with a new callback so they can implement file mapping over file system nodes. * libnetfs/netfs.h: Add prototype for netfs_get_filemap * libnetfs/file-map.c: netfs_get_filemap definition * libnetfs/Makefile: add file-map.c to sources Message-Id: <20211224172132.15058-2-jlledom@mailfence.com> --- libnetfs/file-map.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 libnetfs/file-map.c (limited to 'libnetfs/file-map.c') diff --git a/libnetfs/file-map.c b/libnetfs/file-map.c new file mode 100644 index 00000000..85fe93f2 --- /dev/null +++ b/libnetfs/file-map.c @@ -0,0 +1,31 @@ +/* Default version of netfs_get_filemap + + Copyright (C) 2021 Free Software Foundation, Inc. + + 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 "netfs.h" + +/* The user may define this function. Return a memory object proxy port (send + right) for the file contents of NP. PROT is the maximum allowable + access. On errors, return MACH_PORT_NULL and set errno. */ +mach_port_t __attribute__ ((weak)) +netfs_get_filemap (struct node *np, vm_prot_t prot) +{ + errno = EOPNOTSUPP; + return MACH_PORT_NULL; +} -- cgit v1.2.3