From 9819e76c6d3bda979636c1a0c079308c9fa6485c Mon Sep 17 00:00:00 2001 From: Thomas Bushnell Date: Tue, 16 Feb 1999 10:56:36 +0000 Subject: Tue Feb 16 05:37:03 1999 Thomas Bushnell, BSG * io-revoke.c: New file. * Makefile (IOSRCS): Add iorevoke.c. --- libnetfs/io-revoke.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 libnetfs/io-revoke.c (limited to 'libnetfs/io-revoke.c') diff --git a/libnetfs/io-revoke.c b/libnetfs/io-revoke.c new file mode 100644 index 00000000..05f79f12 --- /dev/null +++ b/libnetfs/io-revoke.c @@ -0,0 +1,61 @@ +/* + Copyright (C) 1999 Free Software Foundation + Written by Thomas Bushnell, BSG. + + This program 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. + + This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "netfs.h" +#include "io_S.h" + +/* Implement io_revoke as described in . */ +kern_return_t +netfs_S_io_revoke (struct protid *cred) +{ + error_t err; + struct node *np; + + error_t + iterator_function (void *port) + { + struct protid *user = port; + + if ((user != cred) && (user->po->np == np)) + ports_destroy_right (user); + } + + if (!cred) + return EOPNOTSUPP; + + np = cred->po->np; + + mutex_lock (&np->lock); + + err = netfs_validate_stat (np, cred); + if (!err) + err = fshelp_isowner (&np->dn_stat, cred->user); + if (err) + { + mutex_unlock (&np->lock); + return err; + } + + ports_bucket_iterate (diskfs_port_bucket, iterator_function); + + mutex_unlock (&np->lock); + + return 0; +} + + -- cgit v1.2.3