/* $NetBSD: ops_lofs.c,v 1.1.1.6 2003/03/09 01:13:16 christos Exp $ */ /* * Copyright (c) 1997-2003 Erez Zadok * Copyright (c) 1990 Jan-Simon Pendry * Copyright (c) 1990 Imperial College of Science, Technology & Medicine * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry at Imperial College, London. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgment: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * * Id: ops_lofs.c,v 1.13 2002/12/27 22:43:51 ezk Exp * */ /* * Loopback file system */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include /* forward definitions */ static char *lofs_match(am_opts *fo); static int lofs_mount(am_node *am, mntfs *mf); static int lofs_umount(am_node *am, mntfs *mf); static int mount_lofs(char *mntdir, char *real_mntdir, char *fs_name, char *opts, int on_autofs); /* * Ops structure */ am_ops lofs_ops = { "lofs", lofs_match, 0, /* lofs_init */ lofs_mount, lofs_umount, amfs_error_lookup_child, amfs_error_mount_child, amfs_error_readdir, 0, /* lofs_readlink */ 0, /* lofs_mounted */ 0, /* lofs_umounted */ find_amfs_auto_srvr, FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ #ifdef HAVE_FS_AUTOFS AUTOFS_LOFS_FS_FLAGS, #endif /* HAVE_FS_AUTOFS */ }; /* * LOFS needs remote filesystem. */ static char * lofs_match(am_opts *fo) { if (!fo->opt_rfs) { plog(XLOG_USER, "lofs: no source filesystem specified"); return 0; } dlog("LOFS: mounting fs \"%s\" on \"%s\"", fo->opt_rfs, fo->opt_fs); /* * Determine magic cookie to put in mtab */ return strdup(fo->opt_rfs); } static int mount_lofs(char *mntdir, char *real_mntdir, char *fs_name, char *opts, int on_autofs) { mntent_t mnt; int flags; /* * Figure out the name of the file system type. */ MTYPE_TYPE type = MOUNT_TYPE_LOFS; /* * Fill in the mount structure */ memset((voidp) &mnt, 0, sizeof(mnt)); mnt.mnt_dir = mntdir; mnt.mnt_fsname = fs_name; mnt.mnt_type = MNTTAB_TYPE_LOFS; mnt.mnt_opts = opts; flags = compute_mount_flags(&mnt); #ifdef HAVE_FS_AUTOFS if (on_autofs) flags |= autofs_compute_mount_flags(&mnt); #endif /* HAVE_FS_AUTOFS */ /* * Call generic mount routine */ return mount_fs2(&mnt, real_mntdir, flags, NULL, 0, type, 0, NULL, mnttab_file_name); } static int lofs_mount(am_node *am, mntfs *mf) { int error; error = mount_lofs(mf->mf_mount, mf->mf_real_mount, mf->mf_info, mf->mf_mopts, am->am_flags & AMF_AUTOFS); if (error) { errno = error; plog(XLOG_ERROR, "mount_lofs: %m"); return error; } return 0; } static int lofs_umount(am_node *am, mntfs *mf) { return UMOUNT_FS(mf->mf_mount, mf->mf_real_mount, mnttab_file_name); }