ops_lofs.c revision 174295
11553Srgrimes/* 21553Srgrimes * Copyright (c) 1997-2006 Erez Zadok 31553Srgrimes * Copyright (c) 1990 Jan-Simon Pendry 41553Srgrimes * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 51553Srgrimes * Copyright (c) 1990 The Regents of the University of California. 61553Srgrimes * All rights reserved. 71553Srgrimes * 81553Srgrimes * This code is derived from software contributed to Berkeley by 91553Srgrimes * Jan-Simon Pendry at Imperial College, London. 101553Srgrimes * 111553Srgrimes * Redistribution and use in source and binary forms, with or without 121553Srgrimes * modification, are permitted provided that the following conditions 131553Srgrimes * are met: 141553Srgrimes * 1. Redistributions of source code must retain the above copyright 151553Srgrimes * notice, this list of conditions and the following disclaimer. 161553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171553Srgrimes * notice, this list of conditions and the following disclaimer in the 181553Srgrimes * documentation and/or other materials provided with the distribution. 191553Srgrimes * 3. All advertising materials mentioning features or use of this software 201553Srgrimes * must display the following acknowledgment: 211553Srgrimes * This product includes software developed by the University of 221553Srgrimes * California, Berkeley and its contributors. 231553Srgrimes * 4. Neither the name of the University nor the names of its contributors 241553Srgrimes * may be used to endorse or promote products derived from this software 251553Srgrimes * without specific prior written permission. 261553Srgrimes * 271553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 281553Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 291553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 301553Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3130380Scharnier * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 321553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 331553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 341553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 351553Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36117278Scharnier * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 371553Srgrimes * SUCH DAMAGE. 381553Srgrimes * 39117278Scharnier * 4030380Scharnier * File: am-utils/amd/ops_lofs.c 411553Srgrimes * 42117278Scharnier */ 43117278Scharnier 44117278Scharnier/* 451553Srgrimes * Loopback file system 461553Srgrimes */ 471553Srgrimes 481553Srgrimes#ifdef HAVE_CONFIG_H 491553Srgrimes# include <config.h> 501553Srgrimes#endif /* HAVE_CONFIG_H */ 511553Srgrimes#include <am_defs.h> 521553Srgrimes#include <amd.h> 531553Srgrimes 541553Srgrimes/* forward definitions */ 551553Srgrimesstatic char *lofs_match(am_opts *fo); 5670284Siedowsestatic int lofs_mount(am_node *am, mntfs *mf); 571553Srgrimesstatic int lofs_umount(am_node *am, mntfs *mf); 581553Srgrimes 591553Srgrimes/* 6030380Scharnier * Ops structure 611553Srgrimes */ 621553Srgrimesam_ops lofs_ops = 631553Srgrimes{ 641553Srgrimes "lofs", 651553Srgrimes lofs_match, 661553Srgrimes 0, /* lofs_init */ 671553Srgrimes lofs_mount, 681553Srgrimes lofs_umount, 6999825Salfred amfs_error_lookup_child, 701553Srgrimes amfs_error_mount_child, 71202206Sed amfs_error_readdir, 7217829Spst 0, /* lofs_readlink */ 7318092Speter 0, /* lofs_mounted */ 741553Srgrimes 0, /* lofs_umounted */ 751553Srgrimes amfs_generic_find_srvr, 7610087Sjkh 0, /* lofs_get_wchan */ 7710087Sjkh FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 7810087Sjkh#ifdef HAVE_FS_AUTOFS 7910087Sjkh AUTOFS_LOFS_FS_FLAGS, 8010087Sjkh#endif /* HAVE_FS_AUTOFS */ 8110087Sjkh}; 8210087Sjkh 8310087Sjkh 8410087Sjkh/* 8510087Sjkh * LOFS needs remote filesystem. 8610087Sjkh */ 8710087Sjkhstatic char * 8810087Sjkhlofs_match(am_opts *fo) 8910087Sjkh{ 9010087Sjkh if (!fo->opt_rfs) { 9110087Sjkh plog(XLOG_USER, "lofs: no source filesystem specified"); 9210087Sjkh return 0; 9310087Sjkh } 9410087Sjkh dlog("LOFS: mounting fs \"%s\" on \"%s\"", 9510087Sjkh fo->opt_rfs, fo->opt_fs); 9610087Sjkh 9710087Sjkh /* 9810087Sjkh * Determine magic cookie to put in mtab 9910087Sjkh */ 10010087Sjkh return strdup(fo->opt_rfs); 10110087Sjkh} 10210087Sjkh 10310087Sjkh 10410087Sjkhint 10517832Spstmount_lofs(char *mntdir, char *fs_name, char *opts, int on_autofs) 10617829Spst{ 10717829Spst mntent_t mnt; 10810087Sjkh int flags; 10910087Sjkh 11010087Sjkh /* 11110087Sjkh * Figure out the name of the file system type. 11210087Sjkh */ 11310087Sjkh MTYPE_TYPE type = MOUNT_TYPE_LOFS; 11410087Sjkh 11510087Sjkh /* 11610087Sjkh * Fill in the mount structure 11741895Sdes */ 11842508Ssteve memset((voidp) &mnt, 0, sizeof(mnt)); 11947963Sbrian mnt.mnt_dir = mntdir; 12010087Sjkh mnt.mnt_fsname = fs_name; 12110087Sjkh mnt.mnt_type = MNTTAB_TYPE_LOFS; 12299825Salfred mnt.mnt_opts = opts; 12399825Salfred 12410087Sjkh flags = compute_mount_flags(&mnt); 12510087Sjkh#ifdef HAVE_FS_AUTOFS 1261553Srgrimes if (on_autofs) 1271553Srgrimes flags |= autofs_compute_mount_flags(&mnt); 1281553Srgrimes#endif /* HAVE_FS_AUTOFS */ 1291553Srgrimes 1301553Srgrimes /* 1311553Srgrimes * Call generic mount routine 1321553Srgrimes */ 1331553Srgrimes return mount_fs(&mnt, flags, NULL, 0, type, 0, NULL, mnttab_file_name, on_autofs); 1341553Srgrimes} 1351553Srgrimes 1361553Srgrimes 1371553Srgrimesstatic int 1381553Srgrimeslofs_mount(am_node *am, mntfs *mf) 1391553Srgrimes{ 1401553Srgrimes int on_autofs = mf->mf_flags & MFF_ON_AUTOFS; 1411553Srgrimes int error; 1421553Srgrimes 1431553Srgrimes error = mount_lofs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs); 1441553Srgrimes if (error) { 1451553Srgrimes errno = error; 1461553Srgrimes plog(XLOG_ERROR, "mount_lofs: %m"); 1471553Srgrimes return error; 1481553Srgrimes } 149201060Sed return 0; 1501553Srgrimes} 15199825Salfred 1521553Srgrimes 15399825Salfredstatic int 15499825Salfredlofs_umount(am_node *am, mntfs *mf) 15599825Salfred{ 15699825Salfred int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0; 15799825Salfred 15899825Salfred return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags); 15999825Salfred} 16099825Salfred