1 /* $NetBSD: ops_tmpfs.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1990 Jan-Simon Pendry 6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1990 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Jan-Simon Pendry at Imperial College, London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * 38 * File: am-utils/amd/ops_tmpfs.c 39 * 40 */ 41 42 /* 43 * TMPFS file system (combines RAM-fs and swap-fs) 44 */ 45 46 #ifdef HAVE_CONFIG_H 47 # include <config.h> 48 #endif /* HAVE_CONFIG_H */ 49 #include <am_defs.h> 50 #include <amd.h> 51 52 /* forward declarations */ 53 static char *tmpfs_match(am_opts *fo); 54 static int tmpfs_mount(am_node *am, mntfs *mf); 55 static int tmpfs_umount(am_node *am, mntfs *mf); 56 57 /* 58 * Ops structure 59 */ 60 am_ops tmpfs_ops = 61 { 62 "tmpfs", 63 tmpfs_match, 64 0, /* tmpfs_init */ 65 tmpfs_mount, 66 tmpfs_umount, 67 amfs_error_lookup_child, 68 amfs_error_mount_child, 69 amfs_error_readdir, 70 0, /* tmpfs_readlink */ 71 0, /* tmpfs_mounted */ 72 0, /* tmpfs_umounted */ 73 amfs_generic_find_srvr, 74 0, /* tmpfs_get_wchan */ 75 FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 76 #if defined(HAVE_FS_AUTOFS) && defined(AUTOFS_TMPFS_FS_FLAGS) 77 AUTOFS_TMPFS_FS_FLAGS, 78 #endif /* HAVE_FS_AUTOFS */ 79 }; 80 81 82 /* 83 * EFS needs local filesystem and device. 84 */ 85 static char * 86 tmpfs_match(am_opts *fo) 87 { 88 89 if (!fo->opt_dev) { 90 plog(XLOG_USER, "tmpfs: no device specified"); 91 return 0; 92 } 93 94 dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs); 95 96 /* 97 * Determine magic cookie to put in mtab 98 */ 99 return xstrdup(fo->opt_dev); 100 } 101 102 103 static int 104 mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs) 105 { 106 tmpfs_args_t tmpfs_args; 107 mntent_t mnt; 108 int flags; 109 const char *p; 110 111 /* 112 * Figure out the name of the file system type. 113 */ 114 MTYPE_TYPE type = MOUNT_TYPE_TMPFS; 115 116 p = NULL; 117 memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */ 118 119 /* 120 * Fill in the mount structure 121 */ 122 memset((voidp) &mnt, 0, sizeof(mnt)); 123 mnt.mnt_dir = mntdir; 124 mnt.mnt_fsname = fs_name; 125 mnt.mnt_type = MNTTAB_TYPE_TMPFS; 126 mnt.mnt_opts = opts; 127 128 flags = compute_mount_flags(&mnt); 129 #ifdef HAVE_FS_AUTOFS 130 if (on_autofs) 131 flags |= autofs_compute_mount_flags(&mnt); 132 #endif /* HAVE_FS_AUTOFS */ 133 134 #if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION) 135 tmpfs_args.ta_version = TMPFS_ARGS_VERSION; 136 #endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */ 137 #ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX 138 if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL) 139 p = "1000000"; 140 tmpfs_args.ta_nodes_max = atoi(p); 141 #endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */ 142 #ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX 143 if ((p = amu_hasmntopt(&mnt, "size")) == NULL) 144 p = "10000000"; 145 tmpfs_args.ta_size_max = atoi(p); 146 #endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */ 147 #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID 148 if ((p = amu_hasmntopt(&mnt, "uid")) == NULL) 149 p = "0"; 150 tmpfs_args.ta_root_uid = atoi(p); 151 #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */ 152 #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID 153 if ((p = amu_hasmntopt(&mnt, "gid")) == NULL) 154 p = "0"; 155 tmpfs_args.ta_root_gid = atoi(p); 156 #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */ 157 #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE 158 if ((p = amu_hasmntopt(&mnt, "mode")) == NULL) 159 p = "01777"; 160 tmpfs_args.ta_root_mode = strtol(p, NULL, 8); 161 #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */ 162 163 /* 164 * Call generic mount routine 165 */ 166 return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs); 167 } 168 169 170 static int 171 tmpfs_mount(am_node *am, mntfs *mf) 172 { 173 int on_autofs = mf->mf_flags & MFF_ON_AUTOFS; 174 int error; 175 176 error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs); 177 if (error) { 178 errno = error; 179 plog(XLOG_ERROR, "mount_tmpfs: %m"); 180 return error; 181 } 182 183 return 0; 184 } 185 186 187 static int 188 tmpfs_umount(am_node *am, mntfs *mf) 189 { 190 int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0; 191 192 return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags); 193 } 194 195
Indexes created Tue Feb 24 08:35:24 UTC 2026