138494Sobrien/* 2310490Scy * Copyright (c) 1997-2014 Erez Zadok 338494Sobrien * Copyright (c) 1990 Jan-Simon Pendry 438494Sobrien * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 538494Sobrien * Copyright (c) 1990 The Regents of the University of California. 638494Sobrien * All rights reserved. 738494Sobrien * 838494Sobrien * This code is derived from software contributed to Berkeley by 938494Sobrien * Jan-Simon Pendry at Imperial College, London. 1038494Sobrien * 1138494Sobrien * Redistribution and use in source and binary forms, with or without 1238494Sobrien * modification, are permitted provided that the following conditions 1338494Sobrien * are met: 1438494Sobrien * 1. Redistributions of source code must retain the above copyright 1538494Sobrien * notice, this list of conditions and the following disclaimer. 1638494Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1738494Sobrien * notice, this list of conditions and the following disclaimer in the 1838494Sobrien * documentation and/or other materials provided with the distribution. 19310490Scy * 3. Neither the name of the University nor the names of its contributors 2038494Sobrien * may be used to endorse or promote products derived from this software 2138494Sobrien * without specific prior written permission. 2238494Sobrien * 2338494Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2438494Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2538494Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2638494Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2738494Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2838494Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2938494Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3038494Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3138494Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3238494Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3338494Sobrien * SUCH DAMAGE. 3438494Sobrien * 3538494Sobrien * 36174294Sobrien * File: am-utils/amd/amfs_nfsl.c 3738494Sobrien * 3838494Sobrien */ 3938494Sobrien 4038494Sobrien/* 4138494Sobrien * NFSL: Network file system with local existence check. If the local 4238494Sobrien * path denoted by $rfs exists, it behaves as type:=link. 4338494Sobrien * 4438494Sobrien * Example: 4538494Sobrien * pkg type:=nfsl;rhost:=jonny;rfs:=/n/johnny/src/pkg;fs:=${rfs} 4638494Sobrien */ 4738494Sobrien 4838494Sobrien#ifdef HAVE_CONFIG_H 4938494Sobrien# include <config.h> 5038494Sobrien#endif /* HAVE_CONFIG_H */ 5138494Sobrien#include <am_defs.h> 5238494Sobrien#include <amd.h> 5338494Sobrien 5438494Sobrien 5538494Sobrien/* forward declarations */ 5638494Sobrienstatic char *amfs_nfsl_match(am_opts *fo); 5738494Sobrienstatic int amfs_nfsl_init(mntfs *mf); 58174294Sobrienstatic int amfs_nfsl_mount(am_node *mp, mntfs *mf); 59174294Sobrienstatic int amfs_nfsl_umount(am_node *mp, mntfs *mf); 60174294Sobrienstatic void amfs_nfsl_umounted(mntfs *mf); 6138494Sobrienstatic fserver *amfs_nfsl_ffserver(mntfs *mf); 6238494Sobrien 6338494Sobrien/* 6438494Sobrien * NFS-Link operations 6538494Sobrien */ 6638494Sobrienam_ops amfs_nfsl_ops = 6738494Sobrien{ 68174294Sobrien "nfsl", 69174294Sobrien amfs_nfsl_match, 70174294Sobrien amfs_nfsl_init, 71174294Sobrien amfs_nfsl_mount, 72174294Sobrien amfs_nfsl_umount, 73174294Sobrien amfs_error_lookup_child, 74174294Sobrien amfs_error_mount_child, 75174294Sobrien amfs_error_readdir, 76174294Sobrien 0, /* amfs_nfsl_readlink */ 77174294Sobrien 0, /* amfs_nfsl_mounted */ 78174294Sobrien amfs_nfsl_umounted, 79174294Sobrien amfs_nfsl_ffserver, 80174294Sobrien 0, /* amfs_nfsl_get_wchan */ 81174294Sobrien FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 82174294Sobrien#ifdef HAVE_FS_AUTOFS 83174294Sobrien AUTOFS_NFSL_FS_FLAGS, 84174294Sobrien#endif /* HAVE_FS_AUTOFS */ 8538494Sobrien}; 8638494Sobrien 8738494Sobrien 8838494Sobrien/* 8938494Sobrien * Check that f/s has all needed fields. 9038494Sobrien * Returns: matched string if found, NULL otherwise. 9138494Sobrien */ 9238494Sobrienstatic char * 9338494Sobrienamfs_nfsl_match(am_opts *fo) 9438494Sobrien{ 95174294Sobrien char *cp; 9638494Sobrien char *ho = fo->opt_rhost; 97174294Sobrien char *retval; 9838494Sobrien struct stat stb; 9938494Sobrien 100310490Scy if (fo->opt_sublink && fo->opt_sublink[0]) 101174294Sobrien cp = fo->opt_sublink; 102174294Sobrien else 103174294Sobrien cp = fo->opt_fs; 104174294Sobrien 10538494Sobrien if (!cp || !ho) { 10642629Sobrien plog(XLOG_USER, "amfs_nfsl: host $fs and $rhost must be specified"); 10738494Sobrien return NULL; 10838494Sobrien } 10938494Sobrien 11038494Sobrien /* 11138494Sobrien * If this host is not the same as $rhost, or if link does not exist, 112174294Sobrien * call nfs_ops.fs_match(). 113174294Sobrien * If link value exists (or same host), call amfs_link_ops.fs_match(). 11438494Sobrien */ 115310490Scy if (!STRCEQ(ho, am_get_hostname()) && !STRCEQ(ho, hostd)) { 116310490Scy plog(XLOG_INFO, "amfs_nfsl: \"%s\" is not the local host \"%s\", " 117310490Scy "or \"%s\" using type:=nfs", ho, am_get_hostname(), hostd); 118174294Sobrien retval = nfs_ops.fs_match(fo); 11938494Sobrien } else if (lstat(cp, &stb) < 0) { 12038494Sobrien plog(XLOG_INFO, "amfs_nfsl: \"%s\" does not exist, using type:=nfs", cp); 121174294Sobrien retval = nfs_ops.fs_match(fo); 12238494Sobrien } else { 12338494Sobrien plog(XLOG_INFO, "amfs_nfsl: \"%s\" exists, using type:=link", cp); 124174294Sobrien retval = amfs_link_ops.fs_match(fo); 12538494Sobrien } 126174294Sobrien return retval; 12738494Sobrien} 12838494Sobrien 12938494Sobrien 13038494Sobrien/* 13138494Sobrien * Initialize. 13238494Sobrien * Returns: 0 if OK, non-zero (errno) if failed. 13338494Sobrien */ 13438494Sobrienstatic int 13538494Sobrienamfs_nfsl_init(mntfs *mf) 13638494Sobrien{ 137174294Sobrien int ret = 0; 13838494Sobrien if (mf->mf_flags & MFF_NFSLINK) { 139174294Sobrien if (amfs_link_ops.fs_init) 140174294Sobrien ret = amfs_link_ops.fs_init(mf); 14138494Sobrien } else { 142174294Sobrien if (nfs_ops.fs_init) 143174294Sobrien ret = nfs_ops.fs_init(mf); 14438494Sobrien } 145174294Sobrien return ret; 14638494Sobrien} 14738494Sobrien 14838494Sobrien 14938494Sobrien/* 15038494Sobrien * Mount vfs. 15138494Sobrien * Returns: 0 if OK, non-zero (errno) if failed. 15238494Sobrien */ 15338494Sobrienstatic int 154174294Sobrienamfs_nfsl_mount(am_node *mp, mntfs *mf) 15538494Sobrien{ 156174294Sobrien int ret = 0; 15738494Sobrien if (mf->mf_flags & MFF_NFSLINK) { 158174294Sobrien if (amfs_link_ops.mount_fs) 159174294Sobrien ret = amfs_link_ops.mount_fs(mp, mf); 16038494Sobrien } else { 161174294Sobrien if (nfs_ops.mount_fs) 162174294Sobrien ret = nfs_ops.mount_fs(mp, mf); 16338494Sobrien } 164174294Sobrien return ret; 16538494Sobrien} 16638494Sobrien 16738494Sobrien 16838494Sobrien/* 16938494Sobrien * Unmount VFS. 17038494Sobrien * Returns: 0 if OK, non-zero (errno) if failed. 17138494Sobrien */ 17238494Sobrienstatic int 173174294Sobrienamfs_nfsl_umount(am_node *mp, mntfs *mf) 17438494Sobrien{ 175174294Sobrien int ret = 0; 17638494Sobrien if (mf->mf_flags & MFF_NFSLINK) { 177174294Sobrien if (amfs_link_ops.umount_fs) 178174294Sobrien ret = amfs_link_ops.umount_fs(mp, mf); 17938494Sobrien } else { 180174294Sobrien if (nfs_ops.umount_fs) 181174294Sobrien ret = nfs_ops.umount_fs(mp, mf); 18238494Sobrien } 183174294Sobrien return ret; 18438494Sobrien} 18538494Sobrien 18638494Sobrien 18738494Sobrien/* 18838494Sobrien * Async unmount callback function. 18938494Sobrien * After the base umount() succeeds, we may want to take extra actions, 19038494Sobrien * such as informing remote mount daemons that we've unmounted them. 19138494Sobrien * See amfs_auto_umounted(), host_umounted(), nfs_umounted(). 19238494Sobrien */ 19338494Sobrienstatic void 194174294Sobrienamfs_nfsl_umounted(mntfs *mf) 19538494Sobrien{ 19638494Sobrien if (mf->mf_flags & MFF_NFSLINK) { 197174294Sobrien if (amfs_link_ops.umounted) 198174294Sobrien amfs_link_ops.umounted(mf); 19938494Sobrien } else { 200174294Sobrien if (nfs_ops.umounted) 201174294Sobrien nfs_ops.umounted(mf); 20238494Sobrien } 20338494Sobrien} 20438494Sobrien 20538494Sobrien 20638494Sobrien/* 20738494Sobrien * Find a file server. 20838494Sobrien * Returns: fserver of found server, or NULL if not found. 20938494Sobrien */ 21038494Sobrienstatic fserver * 21138494Sobrienamfs_nfsl_ffserver(mntfs *mf) 21238494Sobrien{ 213310490Scy char *cp, *ho; 21438494Sobrien struct stat stb; 21538494Sobrien 216310490Scy if (mf->mf_fo == NULL) { 217310490Scy plog(XLOG_ERROR, "%s: NULL mf_fo", __func__); 218310490Scy return NULL; 219310490Scy } 220310490Scy ho = mf->mf_fo->opt_rhost; 221310490Scy 222310490Scy if (mf->mf_fo->opt_sublink && mf->mf_fo->opt_sublink[0]) 223174294Sobrien cp = mf->mf_fo->opt_sublink; 224174294Sobrien else 225174294Sobrien cp = mf->mf_fo->opt_fs; 226174294Sobrien 22738494Sobrien /* 22838494Sobrien * If this host is not the same as $rhost, or if link does not exist, 229174294Sobrien * call amfs_link_ops.ffserver(). 230174294Sobrien * If link value exists (or same host), then call ops_nfs.ffserver(). 23138494Sobrien */ 232310490Scy if ((!STRCEQ(ho, am_get_hostname()) && 233310490Scy !STRCEQ(ho, hostd)) || lstat(cp, &stb) < 0) { 234174294Sobrien return nfs_ops.ffserver(mf); 23538494Sobrien } else { 23638494Sobrien mf->mf_flags |= MFF_NFSLINK; 237174294Sobrien /* remove the FS_MKMNT flag, we don't want amd touching the mountpoint */ 238174294Sobrien mf->mf_fsflags &= ~FS_MKMNT; 239174294Sobrien return amfs_link_ops.ffserver(mf); 24038494Sobrien } 24138494Sobrien} 242