tmpfs_vfsops.c revision 263943
1170808Sdelphij/* $NetBSD: tmpfs_vfsops.c,v 1.10 2005/12/11 12:24:29 christos Exp $ */ 2170808Sdelphij 3182739Sdelphij/*- 4170808Sdelphij * Copyright (c) 2005 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 20170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 31170808Sdelphij */ 32170808Sdelphij 33170808Sdelphij/* 34170808Sdelphij * Efficient memory file system. 35170808Sdelphij * 36170808Sdelphij * tmpfs is a file system that uses NetBSD's virtual memory sub-system 37170808Sdelphij * (the well-known UVM) to store file data and metadata in an efficient 38170808Sdelphij * way. This means that it does not follow the structure of an on-disk 39170808Sdelphij * file system because it simply does not need to. Instead, it uses 40170808Sdelphij * memory-specific data structures and algorithms to automatically 41170808Sdelphij * allocate and release resources. 42170808Sdelphij */ 43170808Sdelphij#include <sys/cdefs.h> 44170808Sdelphij__FBSDID("$FreeBSD: stable/10/sys/fs/tmpfs/tmpfs_vfsops.c 263943 2014-03-30 16:51:12Z bdrewery $"); 45170808Sdelphij 46170808Sdelphij#include <sys/param.h> 47171308Sdelphij#include <sys/limits.h> 48170808Sdelphij#include <sys/lock.h> 49170808Sdelphij#include <sys/mutex.h> 50254741Sdelphij#include <sys/proc.h> 51254741Sdelphij#include <sys/jail.h> 52170808Sdelphij#include <sys/kernel.h> 53170808Sdelphij#include <sys/stat.h> 54170808Sdelphij#include <sys/systm.h> 55170808Sdelphij#include <sys/sysctl.h> 56170808Sdelphij 57170808Sdelphij#include <vm/vm.h> 58170808Sdelphij#include <vm/vm_object.h> 59170808Sdelphij#include <vm/vm_param.h> 60170808Sdelphij 61170808Sdelphij#include <fs/tmpfs/tmpfs.h> 62170808Sdelphij 63170808Sdelphij/* 64171070Sdelphij * Default permission for root node 65170808Sdelphij */ 66170808Sdelphij#define TMPFS_DEFAULT_ROOT_MODE (S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) 67170808Sdelphij 68170808SdelphijMALLOC_DEFINE(M_TMPFSMNT, "tmpfs mount", "tmpfs mount structures"); 69171087SdelphijMALLOC_DEFINE(M_TMPFSNAME, "tmpfs name", "tmpfs file names"); 70170808Sdelphij 71170808Sdelphij/* --------------------------------------------------------------------- */ 72170808Sdelphij 73191990Sattiliostatic int tmpfs_mount(struct mount *); 74191990Sattiliostatic int tmpfs_unmount(struct mount *, int); 75191990Sattiliostatic int tmpfs_root(struct mount *, int flags, struct vnode **); 76222167Srmacklemstatic int tmpfs_fhtovp(struct mount *, struct fid *, int, 77222167Srmacklem struct vnode **); 78191990Sattiliostatic int tmpfs_statfs(struct mount *, struct statfs *); 79170808Sdelphij 80170808Sdelphij/* --------------------------------------------------------------------- */ 81170808Sdelphij 82170808Sdelphijstatic const char *tmpfs_opts[] = { 83203164Sjh "from", "size", "maxfilesize", "inodes", "uid", "gid", "mode", "export", 84253573Snwhitehorn "union", NULL 85170808Sdelphij}; 86170808Sdelphij 87234346Sjhstatic const char *tmpfs_updateopts[] = { 88234346Sjh "from", "export", NULL 89234346Sjh}; 90234346Sjh 91170808Sdelphij/* --------------------------------------------------------------------- */ 92170808Sdelphij 93171029Sdelphijstatic int 94171029Sdelphijtmpfs_node_ctor(void *mem, int size, void *arg, int flags) 95171029Sdelphij{ 96171029Sdelphij struct tmpfs_node *node = (struct tmpfs_node *)mem; 97171070Sdelphij 98171362Sdelphij node->tn_gen++; 99171029Sdelphij node->tn_size = 0; 100171029Sdelphij node->tn_status = 0; 101171029Sdelphij node->tn_flags = 0; 102171029Sdelphij node->tn_links = 0; 103171029Sdelphij node->tn_vnode = NULL; 104171029Sdelphij node->tn_vpstate = 0; 105170808Sdelphij 106171029Sdelphij return (0); 107171029Sdelphij} 108171029Sdelphij 109171029Sdelphijstatic void 110171029Sdelphijtmpfs_node_dtor(void *mem, int size, void *arg) 111171029Sdelphij{ 112171029Sdelphij struct tmpfs_node *node = (struct tmpfs_node *)mem; 113171029Sdelphij node->tn_type = VNON; 114171029Sdelphij} 115171029Sdelphij 116171070Sdelphijstatic int 117171029Sdelphijtmpfs_node_init(void *mem, int size, int flags) 118171029Sdelphij{ 119171029Sdelphij struct tmpfs_node *node = (struct tmpfs_node *)mem; 120171029Sdelphij node->tn_id = 0; 121171029Sdelphij 122171029Sdelphij mtx_init(&node->tn_interlock, "tmpfs node interlock", NULL, MTX_DEF); 123171362Sdelphij node->tn_gen = arc4random(); 124171070Sdelphij 125171029Sdelphij return (0); 126171029Sdelphij} 127171029Sdelphij 128171029Sdelphijstatic void 129171029Sdelphijtmpfs_node_fini(void *mem, int size) 130171029Sdelphij{ 131171029Sdelphij struct tmpfs_node *node = (struct tmpfs_node *)mem; 132171070Sdelphij 133171029Sdelphij mtx_destroy(&node->tn_interlock); 134171029Sdelphij} 135171029Sdelphij 136170808Sdelphijstatic int 137191990Sattiliotmpfs_mount(struct mount *mp) 138170808Sdelphij{ 139234000Sgleb const size_t nodes_per_page = howmany(PAGE_SIZE, 140234000Sgleb sizeof(struct tmpfs_dirent) + sizeof(struct tmpfs_node)); 141170808Sdelphij struct tmpfs_mount *tmp; 142170808Sdelphij struct tmpfs_node *root; 143254741Sdelphij struct thread *td = curthread; 144170808Sdelphij int error; 145171308Sdelphij /* Size counters. */ 146233999Sgleb u_quad_t pages; 147233999Sgleb off_t nodes_max, size_max, maxfilesize; 148170808Sdelphij 149171308Sdelphij /* Root node attributes. */ 150202187Sjh uid_t root_uid; 151202187Sjh gid_t root_gid; 152202187Sjh mode_t root_mode; 153171308Sdelphij 154202187Sjh struct vattr va; 155171308Sdelphij 156254741Sdelphij if (!prison_allow(td->td_ucred, PR_ALLOW_MOUNT_TMPFS)) 157254741Sdelphij return (EPERM); 158254741Sdelphij 159170808Sdelphij if (vfs_filteropt(mp->mnt_optnew, tmpfs_opts)) 160170808Sdelphij return (EINVAL); 161170808Sdelphij 162170808Sdelphij if (mp->mnt_flag & MNT_UPDATE) { 163234346Sjh /* Only support update mounts for certain options. */ 164234346Sjh if (vfs_filteropt(mp->mnt_optnew, tmpfs_updateopts) != 0) 165234346Sjh return (EOPNOTSUPP); 166234346Sjh if (vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0) != 167234346Sjh ((struct tmpfs_mount *)mp->mnt_data)->tm_ronly) 168234346Sjh return (EOPNOTSUPP); 169234346Sjh return (0); 170170808Sdelphij } 171170808Sdelphij 172175202Sattilio vn_lock(mp->mnt_vnodecovered, LK_SHARED | LK_RETRY); 173182371Sattilio error = VOP_GETATTR(mp->mnt_vnodecovered, &va, mp->mnt_cred); 174175294Sattilio VOP_UNLOCK(mp->mnt_vnodecovered, 0); 175171308Sdelphij if (error) 176171308Sdelphij return (error); 177170808Sdelphij 178171308Sdelphij if (mp->mnt_cred->cr_ruid != 0 || 179171308Sdelphij vfs_scanopt(mp->mnt_optnew, "gid", "%d", &root_gid) != 1) 180171308Sdelphij root_gid = va.va_gid; 181171308Sdelphij if (mp->mnt_cred->cr_ruid != 0 || 182171308Sdelphij vfs_scanopt(mp->mnt_optnew, "uid", "%d", &root_uid) != 1) 183171308Sdelphij root_uid = va.va_uid; 184171308Sdelphij if (mp->mnt_cred->cr_ruid != 0 || 185173570Sdelphij vfs_scanopt(mp->mnt_optnew, "mode", "%ho", &root_mode) != 1) 186171308Sdelphij root_mode = va.va_mode; 187233999Sgleb if (vfs_getopt_size(mp->mnt_optnew, "inodes", &nodes_max) != 0) 188171308Sdelphij nodes_max = 0; 189233999Sgleb if (vfs_getopt_size(mp->mnt_optnew, "size", &size_max) != 0) 190171308Sdelphij size_max = 0; 191233999Sgleb if (vfs_getopt_size(mp->mnt_optnew, "maxfilesize", &maxfilesize) != 0) 192203164Sjh maxfilesize = 0; 193170808Sdelphij 194170808Sdelphij /* Do not allow mounts if we do not have enough memory to preserve 195170808Sdelphij * the minimum reserved pages. */ 196233998Sgleb if (tmpfs_mem_avail() < TMPFS_PAGES_MINRESERVED) 197170808Sdelphij return ENOSPC; 198170808Sdelphij 199170808Sdelphij /* Get the maximum number of memory pages this file system is 200170808Sdelphij * allowed to use, based on the maximum size the user passed in 201170808Sdelphij * the mount structure. A value of zero is treated as if the 202170808Sdelphij * maximum available space was requested. */ 203263943Sbdrewery if (size_max == 0 || size_max > OFF_MAX - PAGE_SIZE || 204233999Sgleb (SIZE_MAX < OFF_MAX && size_max / PAGE_SIZE >= SIZE_MAX)) 205170808Sdelphij pages = SIZE_MAX; 206263943Sbdrewery else { 207263943Sbdrewery size_max = roundup(size_max, PAGE_SIZE); 208171308Sdelphij pages = howmany(size_max, PAGE_SIZE); 209263943Sbdrewery } 210170808Sdelphij MPASS(pages > 0); 211170808Sdelphij 212202708Sjh if (nodes_max <= 3) { 213234000Sgleb if (pages < INT_MAX / nodes_per_page) 214234000Sgleb nodes_max = pages * nodes_per_page; 215202708Sjh else 216234000Sgleb nodes_max = INT_MAX; 217233999Sgleb } 218234000Sgleb if (nodes_max > INT_MAX) 219234000Sgleb nodes_max = INT_MAX; 220233999Sgleb MPASS(nodes_max >= 3); 221170808Sdelphij 222170808Sdelphij /* Allocate the tmpfs mount structure and fill it. */ 223170808Sdelphij tmp = (struct tmpfs_mount *)malloc(sizeof(struct tmpfs_mount), 224170808Sdelphij M_TMPFSMNT, M_WAITOK | M_ZERO); 225171070Sdelphij 226170808Sdelphij mtx_init(&tmp->allnode_lock, "tmpfs allnode lock", NULL, MTX_DEF); 227233999Sgleb tmp->tm_nodes_max = nodes_max; 228170808Sdelphij tmp->tm_nodes_inuse = 0; 229233999Sgleb tmp->tm_maxfilesize = maxfilesize > 0 ? maxfilesize : OFF_MAX; 230170808Sdelphij LIST_INIT(&tmp->tm_nodes_used); 231171070Sdelphij 232170808Sdelphij tmp->tm_pages_max = pages; 233170808Sdelphij tmp->tm_pages_used = 0; 234171362Sdelphij tmp->tm_ino_unr = new_unrhdr(2, INT_MAX, &tmp->allnode_lock); 235173724Sdelphij tmp->tm_dirent_pool = uma_zcreate("TMPFS dirent", 236173724Sdelphij sizeof(struct tmpfs_dirent), 237173724Sdelphij NULL, NULL, NULL, NULL, 238173724Sdelphij UMA_ALIGN_PTR, 0); 239173724Sdelphij tmp->tm_node_pool = uma_zcreate("TMPFS node", 240173724Sdelphij sizeof(struct tmpfs_node), 241173724Sdelphij tmpfs_node_ctor, tmpfs_node_dtor, 242173724Sdelphij tmpfs_node_init, tmpfs_node_fini, 243173724Sdelphij UMA_ALIGN_PTR, 0); 244234346Sjh tmp->tm_ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 245170808Sdelphij 246170808Sdelphij /* Allocate the root node. */ 247171308Sdelphij error = tmpfs_alloc_node(tmp, VDIR, root_uid, 248171308Sdelphij root_gid, root_mode & ALLPERMS, NULL, NULL, 249191990Sattilio VNOVAL, &root); 250170808Sdelphij 251170808Sdelphij if (error != 0 || root == NULL) { 252171029Sdelphij uma_zdestroy(tmp->tm_node_pool); 253171029Sdelphij uma_zdestroy(tmp->tm_dirent_pool); 254171362Sdelphij delete_unrhdr(tmp->tm_ino_unr); 255170808Sdelphij free(tmp, M_TMPFSMNT); 256170808Sdelphij return error; 257170808Sdelphij } 258241011Smdf KASSERT(root->tn_id == 2, 259241011Smdf ("tmpfs root with invalid ino: %ju", (uintmax_t)root->tn_id)); 260170808Sdelphij tmp->tm_root = root; 261170808Sdelphij 262170808Sdelphij MNT_ILOCK(mp); 263170808Sdelphij mp->mnt_flag |= MNT_LOCAL; 264170808Sdelphij MNT_IUNLOCK(mp); 265171070Sdelphij 266170808Sdelphij mp->mnt_data = tmp; 267170808Sdelphij mp->mnt_stat.f_namemax = MAXNAMLEN; 268170808Sdelphij vfs_getnewfsid(mp); 269170808Sdelphij vfs_mountedfrom(mp, "tmpfs"); 270170808Sdelphij 271170808Sdelphij return 0; 272170808Sdelphij} 273170808Sdelphij 274170808Sdelphij/* --------------------------------------------------------------------- */ 275170808Sdelphij 276170808Sdelphij/* ARGSUSED2 */ 277170808Sdelphijstatic int 278191990Sattiliotmpfs_unmount(struct mount *mp, int mntflags) 279170808Sdelphij{ 280170808Sdelphij int error; 281170808Sdelphij int flags = 0; 282170808Sdelphij struct tmpfs_mount *tmp; 283170808Sdelphij struct tmpfs_node *node; 284170808Sdelphij 285170808Sdelphij /* Handle forced unmounts. */ 286170808Sdelphij if (mntflags & MNT_FORCE) 287170808Sdelphij flags |= FORCECLOSE; 288170808Sdelphij 289170808Sdelphij /* Finalize all pending I/O. */ 290191990Sattilio error = vflush(mp, 0, flags, curthread); 291170808Sdelphij if (error != 0) 292170808Sdelphij return error; 293170808Sdelphij 294170808Sdelphij tmp = VFS_TO_TMPFS(mp); 295171070Sdelphij 296170808Sdelphij /* Free all associated data. The loop iterates over the linked list 297170808Sdelphij * we have containing all used nodes. For each of them that is 298170808Sdelphij * a directory, we free all its directory entries. Note that after 299170808Sdelphij * freeing a node, it will automatically go to the available list, 300170808Sdelphij * so we will later have to iterate over it to release its items. */ 301170808Sdelphij node = LIST_FIRST(&tmp->tm_nodes_used); 302170808Sdelphij while (node != NULL) { 303170808Sdelphij struct tmpfs_node *next; 304170808Sdelphij 305245115Sgleb if (node->tn_type == VDIR) 306245115Sgleb tmpfs_dir_destroy(tmp, node); 307170808Sdelphij 308170808Sdelphij next = LIST_NEXT(node, tn_entries); 309170808Sdelphij tmpfs_free_node(tmp, node); 310170808Sdelphij node = next; 311170808Sdelphij } 312170808Sdelphij 313171029Sdelphij uma_zdestroy(tmp->tm_dirent_pool); 314171029Sdelphij uma_zdestroy(tmp->tm_node_pool); 315171362Sdelphij delete_unrhdr(tmp->tm_ino_unr); 316170808Sdelphij 317170808Sdelphij mtx_destroy(&tmp->allnode_lock); 318170808Sdelphij MPASS(tmp->tm_pages_used == 0); 319171308Sdelphij MPASS(tmp->tm_nodes_inuse == 0); 320170808Sdelphij 321170808Sdelphij /* Throw away the tmpfs_mount structure. */ 322170808Sdelphij free(mp->mnt_data, M_TMPFSMNT); 323170808Sdelphij mp->mnt_data = NULL; 324171070Sdelphij 325170808Sdelphij MNT_ILOCK(mp); 326170808Sdelphij mp->mnt_flag &= ~MNT_LOCAL; 327170808Sdelphij MNT_IUNLOCK(mp); 328170808Sdelphij return 0; 329170808Sdelphij} 330170808Sdelphij 331170808Sdelphij/* --------------------------------------------------------------------- */ 332170808Sdelphij 333170808Sdelphijstatic int 334191990Sattiliotmpfs_root(struct mount *mp, int flags, struct vnode **vpp) 335170808Sdelphij{ 336170808Sdelphij int error; 337191990Sattilio error = tmpfs_alloc_vp(mp, VFS_TO_TMPFS(mp)->tm_root, flags, vpp); 338170808Sdelphij 339170808Sdelphij if (!error) 340171029Sdelphij (*vpp)->v_vflag |= VV_ROOT; 341170808Sdelphij 342170808Sdelphij return error; 343170808Sdelphij} 344170808Sdelphij 345170808Sdelphij/* --------------------------------------------------------------------- */ 346170808Sdelphij 347170808Sdelphijstatic int 348222167Srmacklemtmpfs_fhtovp(struct mount *mp, struct fid *fhp, int flags, 349222167Srmacklem struct vnode **vpp) 350170808Sdelphij{ 351170808Sdelphij boolean_t found; 352170808Sdelphij struct tmpfs_fid *tfhp; 353170808Sdelphij struct tmpfs_mount *tmp; 354170808Sdelphij struct tmpfs_node *node; 355170808Sdelphij 356170808Sdelphij tmp = VFS_TO_TMPFS(mp); 357170808Sdelphij 358170808Sdelphij tfhp = (struct tmpfs_fid *)fhp; 359170808Sdelphij if (tfhp->tf_len != sizeof(struct tmpfs_fid)) 360170808Sdelphij return EINVAL; 361170808Sdelphij 362170808Sdelphij if (tfhp->tf_id >= tmp->tm_nodes_max) 363170808Sdelphij return EINVAL; 364170808Sdelphij 365170808Sdelphij found = FALSE; 366170808Sdelphij 367170808Sdelphij TMPFS_LOCK(tmp); 368170808Sdelphij LIST_FOREACH(node, &tmp->tm_nodes_used, tn_entries) { 369170808Sdelphij if (node->tn_id == tfhp->tf_id && 370170808Sdelphij node->tn_gen == tfhp->tf_gen) { 371170808Sdelphij found = TRUE; 372170808Sdelphij break; 373170808Sdelphij } 374170808Sdelphij } 375170808Sdelphij TMPFS_UNLOCK(tmp); 376170808Sdelphij 377171799Sdelphij if (found) 378191990Sattilio return (tmpfs_alloc_vp(mp, node, LK_EXCLUSIVE, vpp)); 379171799Sdelphij 380171799Sdelphij return (EINVAL); 381170808Sdelphij} 382170808Sdelphij 383170808Sdelphij/* --------------------------------------------------------------------- */ 384170808Sdelphij 385170808Sdelphij/* ARGSUSED2 */ 386170808Sdelphijstatic int 387191990Sattiliotmpfs_statfs(struct mount *mp, struct statfs *sbp) 388170808Sdelphij{ 389170808Sdelphij struct tmpfs_mount *tmp; 390233998Sgleb size_t used; 391170808Sdelphij 392170808Sdelphij tmp = VFS_TO_TMPFS(mp); 393170808Sdelphij 394171070Sdelphij sbp->f_iosize = PAGE_SIZE; 395170808Sdelphij sbp->f_bsize = PAGE_SIZE; 396170808Sdelphij 397233998Sgleb used = tmpfs_pages_used(tmp); 398233998Sgleb if (tmp->tm_pages_max != SIZE_MAX) 399233998Sgleb sbp->f_blocks = tmp->tm_pages_max; 400233998Sgleb else 401233998Sgleb sbp->f_blocks = used + tmpfs_mem_avail(); 402233998Sgleb if (sbp->f_blocks <= used) 403233998Sgleb sbp->f_bavail = 0; 404233998Sgleb else 405233998Sgleb sbp->f_bavail = sbp->f_blocks - used; 406233998Sgleb sbp->f_bfree = sbp->f_bavail; 407233998Sgleb used = tmp->tm_nodes_inuse; 408233998Sgleb sbp->f_files = tmp->tm_nodes_max; 409233998Sgleb if (sbp->f_files <= used) 410233998Sgleb sbp->f_ffree = 0; 411233998Sgleb else 412233998Sgleb sbp->f_ffree = sbp->f_files - used; 413170808Sdelphij /* sbp->f_owner = tmp->tn_uid; */ 414170808Sdelphij 415170808Sdelphij return 0; 416170808Sdelphij} 417170808Sdelphij 418170808Sdelphij/* --------------------------------------------------------------------- */ 419170808Sdelphij 420170808Sdelphij/* 421170808Sdelphij * tmpfs vfs operations. 422170808Sdelphij */ 423170808Sdelphij 424170808Sdelphijstruct vfsops tmpfs_vfsops = { 425170808Sdelphij .vfs_mount = tmpfs_mount, 426170808Sdelphij .vfs_unmount = tmpfs_unmount, 427170808Sdelphij .vfs_root = tmpfs_root, 428170808Sdelphij .vfs_statfs = tmpfs_statfs, 429170808Sdelphij .vfs_fhtovp = tmpfs_fhtovp, 430170808Sdelphij}; 431254741SdelphijVFS_SET(tmpfs_vfsops, tmpfs, VFCF_JAIL); 432