/* $NetBSD: ops_tmpfs.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */ /* * Copyright (c) 1997-2014 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. 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. * * * File: am-utils/amd/ops_tmpfs.c * */ /* * TMPFS file system (combines RAM-fs and swap-fs) */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include /* forward declarations */ static char *tmpfs_match(am_opts *fo); static int tmpfs_mount(am_node *am, mntfs *mf); static int tmpfs_umount(am_node *am, mntfs *mf); /* * Ops structure */ am_ops tmpfs_ops = { "tmpfs", tmpfs_match, 0, /* tmpfs_init */ tmpfs_mount, tmpfs_umount, amfs_error_lookup_child, amfs_error_mount_child, amfs_error_readdir, 0, /* tmpfs_readlink */ 0, /* tmpfs_mounted */ 0, /* tmpfs_umounted */ amfs_generic_find_srvr, 0, /* tmpfs_get_wchan */ FS_MKMNT | FS_NOTIMEOUT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ #if defined(HAVE_FS_AUTOFS) && defined(AUTOFS_TMPFS_FS_FLAGS) AUTOFS_TMPFS_FS_FLAGS, #endif /* HAVE_FS_AUTOFS */ }; /* * EFS needs local filesystem and device. */ static char * tmpfs_match(am_opts *fo) { if (!fo->opt_dev) { plog(XLOG_USER, "tmpfs: no device specified"); return 0; } dlog("EFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs); /* * Determine magic cookie to put in mtab */ return xstrdup(fo->opt_dev); } static int mount_tmpfs(char *mntdir, char *fs_name, char *opts, int on_autofs) { tmpfs_args_t tmpfs_args; mntent_t mnt; int flags; const char *p; /* * Figure out the name of the file system type. */ MTYPE_TYPE type = MOUNT_TYPE_TMPFS; p = NULL; memset((voidp) &tmpfs_args, 0, sizeof(tmpfs_args)); /* Paranoid */ /* * 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_TMPFS; 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 */ #if defined(HAVE_TMPFS_ARGS_T_TA_VERSION) && defined(TMPFS_ARGS_VERSION) tmpfs_args.ta_version = TMPFS_ARGS_VERSION; #endif /* HAVE_TMPFS_ARGS_T_TA_VERSION && TMPFS_ARGS_VERSION */ #ifdef HAVE_TMPFS_ARGS_T_TA_NODES_MAX if ((p = amu_hasmntopt(&mnt, "nodes")) == NULL) p = "1000000"; tmpfs_args.ta_nodes_max = atoi(p); #endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */ #ifdef HAVE_TMPFS_ARGS_T_TA_SIZE_MAX if ((p = amu_hasmntopt(&mnt, "size")) == NULL) p = "10000000"; tmpfs_args.ta_size_max = atoi(p); #endif /* HAVE_TMPFS_ARGS_T_TA_SIZE_MAX */ #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_UID if ((p = amu_hasmntopt(&mnt, "uid")) == NULL) p = "0"; tmpfs_args.ta_root_uid = atoi(p); #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_UID */ #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_GID if ((p = amu_hasmntopt(&mnt, "gid")) == NULL) p = "0"; tmpfs_args.ta_root_gid = atoi(p); #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_GID */ #ifdef HAVE_TMPFS_ARGS_T_TA_ROOT_MODE if ((p = amu_hasmntopt(&mnt, "mode")) == NULL) p = "01777"; tmpfs_args.ta_root_mode = strtol(p, NULL, 8); #endif /* HAVE_TMPFS_ARGS_T_TA_ROOT_MODE */ /* * Call generic mount routine */ return mount_fs(&mnt, flags, (caddr_t) &tmpfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs); } static int tmpfs_mount(am_node *am, mntfs *mf) { int on_autofs = mf->mf_flags & MFF_ON_AUTOFS; int error; error = mount_tmpfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs); if (error) { errno = error; plog(XLOG_ERROR, "mount_tmpfs: %m"); return error; } return 0; } static int tmpfs_umount(am_node *am, mntfs *mf) { int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0; return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags); }