1df8bae1dSRodney W. Grimes /* 2996c772fSJohn Dyson * Copyright (c) 1992, 1993, 1995 3df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 4df8bae1dSRodney W. Grimes * 5df8bae1dSRodney W. Grimes * This code is derived from software donated to Berkeley by 6df8bae1dSRodney W. Grimes * Jan-Simon Pendry. 7df8bae1dSRodney W. Grimes * 8df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 9df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 10df8bae1dSRodney W. Grimes * are met: 11df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 12df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 13df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 14df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 15df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 16df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 17df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 18df8bae1dSRodney W. Grimes * without specific prior written permission. 19df8bae1dSRodney W. Grimes * 20df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30df8bae1dSRodney W. Grimes * SUCH DAMAGE. 31df8bae1dSRodney W. Grimes * 32df8bae1dSRodney W. Grimes * @(#)null_vfsops.c 8.2 (Berkeley) 1/21/94 33df8bae1dSRodney W. Grimes * 34df8bae1dSRodney W. Grimes * @(#)lofs_vfsops.c 1.2 (Berkeley) 6/18/92 35c3aac50fSPeter Wemm * $FreeBSD$ 36df8bae1dSRodney W. Grimes */ 37df8bae1dSRodney W. Grimes 38df8bae1dSRodney W. Grimes /* 39df8bae1dSRodney W. Grimes * Null Layer 40df8bae1dSRodney W. Grimes * (See null_vnops.c for a description of what this does.) 41df8bae1dSRodney W. Grimes */ 42df8bae1dSRodney W. Grimes 43df8bae1dSRodney W. Grimes #include <sys/param.h> 44df8bae1dSRodney W. Grimes #include <sys/systm.h> 454ea4f1f9SMarcel Moolenaar #include <sys/kdb.h> 46fdc0430eSMike Pritchard #include <sys/kernel.h> 47fb919e4dSMark Murray #include <sys/lock.h> 48a1c995b6SPoul-Henning Kamp #include <sys/malloc.h> 49df8bae1dSRodney W. Grimes #include <sys/mount.h> 50df8bae1dSRodney W. Grimes #include <sys/namei.h> 51fb919e4dSMark Murray #include <sys/proc.h> 52fb919e4dSMark Murray #include <sys/vnode.h> 53fb919e4dSMark Murray 5499d300a1SRuslan Ermilov #include <fs/nullfs/null.h> 55df8bae1dSRodney W. Grimes 56a1c995b6SPoul-Henning Kamp static MALLOC_DEFINE(M_NULLFSMNT, "NULLFS mount", "NULLFS mount structure"); 57a1c995b6SPoul-Henning Kamp 587652131bSPoul-Henning Kamp static vfs_fhtovp_t nullfs_fhtovp; 597652131bSPoul-Henning Kamp static vfs_checkexp_t nullfs_checkexp; 605e8c582aSPoul-Henning Kamp static vfs_mount_t nullfs_mount; 617652131bSPoul-Henning Kamp static vfs_quotactl_t nullfs_quotactl; 627652131bSPoul-Henning Kamp static vfs_root_t nullfs_root; 637652131bSPoul-Henning Kamp static vfs_start_t nullfs_start; 647652131bSPoul-Henning Kamp static vfs_sync_t nullfs_sync; 657652131bSPoul-Henning Kamp static vfs_statfs_t nullfs_statfs; 667652131bSPoul-Henning Kamp static vfs_unmount_t nullfs_unmount; 677652131bSPoul-Henning Kamp static vfs_vget_t nullfs_vget; 687652131bSPoul-Henning Kamp static vfs_vptofh_t nullfs_vptofh; 697652131bSPoul-Henning Kamp static vfs_extattrctl_t nullfs_extattrctl; 709b5e8b3aSBruce Evans 71df8bae1dSRodney W. Grimes /* 72df8bae1dSRodney W. Grimes * Mount null layer 73df8bae1dSRodney W. Grimes */ 74d4b7a369SPoul-Henning Kamp static int 755e8c582aSPoul-Henning Kamp nullfs_mount(struct mount *mp, struct thread *td) 76df8bae1dSRodney W. Grimes { 77df8bae1dSRodney W. Grimes int error = 0; 78df8bae1dSRodney W. Grimes struct vnode *lowerrootvp, *vp; 79df8bae1dSRodney W. Grimes struct vnode *nullm_rootvp; 80df8bae1dSRodney W. Grimes struct null_mount *xmp; 819fcc512cSMaxime Henrion char *target; 82aa56d911SMatt Jacob size_t size; 839fcc512cSMaxime Henrion int isvnunlocked = 0, len; 845e8c582aSPoul-Henning Kamp struct nameidata nd, *ndp = &nd; 85df8bae1dSRodney W. Grimes 868da80660SBoris Popov NULLFSDEBUG("nullfs_mount(mp = %p)\n", (void *)mp); 87df8bae1dSRodney W. Grimes 88df8bae1dSRodney W. Grimes /* 89df8bae1dSRodney W. Grimes * Update is a no-op 90df8bae1dSRodney W. Grimes */ 91df8bae1dSRodney W. Grimes if (mp->mnt_flag & MNT_UPDATE) { 92df8bae1dSRodney W. Grimes return (EOPNOTSUPP); 93b40ce416SJulian Elischer /* return VFS_MOUNT(MOUNTTONULLMOUNT(mp)->nullm_vfs, path, data, ndp, td);*/ 94df8bae1dSRodney W. Grimes } 95df8bae1dSRodney W. Grimes 96df8bae1dSRodney W. Grimes /* 97df8bae1dSRodney W. Grimes * Get argument 98df8bae1dSRodney W. Grimes */ 999fcc512cSMaxime Henrion error = vfs_getopt(mp->mnt_optnew, "target", (void **)&target, &len); 1009fcc512cSMaxime Henrion if (error || target[len - 1] != '\0') 1019fcc512cSMaxime Henrion return (EINVAL); 102df8bae1dSRodney W. Grimes 103df8bae1dSRodney W. Grimes /* 104f85e8fc5SKATO Takenori * Unlock lower node to avoid deadlock. 105f85e8fc5SKATO Takenori * (XXX) VOP_ISLOCKED is needed? 106f85e8fc5SKATO Takenori */ 107f85e8fc5SKATO Takenori if ((mp->mnt_vnodecovered->v_op == null_vnodeop_p) && 1086bdfe06aSEivind Eklund VOP_ISLOCKED(mp->mnt_vnodecovered, NULL)) { 109b40ce416SJulian Elischer VOP_UNLOCK(mp->mnt_vnodecovered, 0, td); 110f85e8fc5SKATO Takenori isvnunlocked = 1; 111f85e8fc5SKATO Takenori } 112f85e8fc5SKATO Takenori /* 113df8bae1dSRodney W. Grimes * Find lower node 114df8bae1dSRodney W. Grimes */ 115df8bae1dSRodney W. Grimes NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF, 1169fcc512cSMaxime Henrion UIO_SYSSPACE, target, td); 1173a773ad0SPoul-Henning Kamp error = namei(ndp); 118f85e8fc5SKATO Takenori /* 119f85e8fc5SKATO Takenori * Re-lock vnode. 120f85e8fc5SKATO Takenori */ 1216bdfe06aSEivind Eklund if (isvnunlocked && !VOP_ISLOCKED(mp->mnt_vnodecovered, NULL)) 122b40ce416SJulian Elischer vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY, td); 123f85e8fc5SKATO Takenori 1243a773ad0SPoul-Henning Kamp if (error) 125df8bae1dSRodney W. Grimes return (error); 126762e6b85SEivind Eklund NDFREE(ndp, NDF_ONLY_PNBUF); 127df8bae1dSRodney W. Grimes 128df8bae1dSRodney W. Grimes /* 129df8bae1dSRodney W. Grimes * Sanity check on lower vnode 130df8bae1dSRodney W. Grimes */ 131df8bae1dSRodney W. Grimes lowerrootvp = ndp->ni_vp; 132df8bae1dSRodney W. Grimes 133df8bae1dSRodney W. Grimes vrele(ndp->ni_dvp); 134c5e17d9eSKATO Takenori ndp->ni_dvp = NULLVP; 135df8bae1dSRodney W. Grimes 136f85e8fc5SKATO Takenori /* 137f85e8fc5SKATO Takenori * Check multi null mount to avoid `lock against myself' panic. 138f85e8fc5SKATO Takenori */ 139f85e8fc5SKATO Takenori if (lowerrootvp == VTONULL(mp->mnt_vnodecovered)->null_lowervp) { 1408da80660SBoris Popov NULLFSDEBUG("nullfs_mount: multi null mount?\n"); 1416716c905SBoris Popov vput(lowerrootvp); 142747e9157SKATO Takenori return (EDEADLK); 143f85e8fc5SKATO Takenori } 144f85e8fc5SKATO Takenori 145df8bae1dSRodney W. Grimes xmp = (struct null_mount *) malloc(sizeof(struct null_mount), 146a163d034SWarner Losh M_NULLFSMNT, M_WAITOK); /* XXX */ 147df8bae1dSRodney W. Grimes 148df8bae1dSRodney W. Grimes /* 149df8bae1dSRodney W. Grimes * Save reference to underlying FS 150df8bae1dSRodney W. Grimes */ 151df8bae1dSRodney W. Grimes xmp->nullm_vfs = lowerrootvp->v_mount; 152df8bae1dSRodney W. Grimes 153df8bae1dSRodney W. Grimes /* 154df8bae1dSRodney W. Grimes * Save reference. Each mount also holds 155df8bae1dSRodney W. Grimes * a reference on the root vnode. 156df8bae1dSRodney W. Grimes */ 1571cfdefbbSSemen Ustimenko error = null_nodeget(mp, lowerrootvp, &vp); 158df8bae1dSRodney W. Grimes /* 159df8bae1dSRodney W. Grimes * Make sure the node alias worked 160df8bae1dSRodney W. Grimes */ 161df8bae1dSRodney W. Grimes if (error) { 16275cabb63SJeff Roberson VOP_UNLOCK(vp, 0, td); 163df8bae1dSRodney W. Grimes vrele(lowerrootvp); 164a1c995b6SPoul-Henning Kamp free(xmp, M_NULLFSMNT); /* XXX */ 165df8bae1dSRodney W. Grimes return (error); 166df8bae1dSRodney W. Grimes } 167df8bae1dSRodney W. Grimes 168df8bae1dSRodney W. Grimes /* 169df8bae1dSRodney W. Grimes * Keep a held reference to the root vnode. 170df8bae1dSRodney W. Grimes * It is vrele'd in nullfs_unmount. 171df8bae1dSRodney W. Grimes */ 172df8bae1dSRodney W. Grimes nullm_rootvp = vp; 173e6e370a7SJeff Roberson nullm_rootvp->v_vflag |= VV_ROOT; 174df8bae1dSRodney W. Grimes xmp->nullm_rootvp = nullm_rootvp; 17575cabb63SJeff Roberson 17675cabb63SJeff Roberson /* 17775cabb63SJeff Roberson * Unlock the node (either the lower or the alias) 17875cabb63SJeff Roberson */ 17975cabb63SJeff Roberson VOP_UNLOCK(vp, 0, td); 18075cabb63SJeff Roberson 181df8bae1dSRodney W. Grimes if (NULLVPTOLOWERVP(nullm_rootvp)->v_mount->mnt_flag & MNT_LOCAL) 182df8bae1dSRodney W. Grimes mp->mnt_flag |= MNT_LOCAL; 183df8bae1dSRodney W. Grimes mp->mnt_data = (qaddr_t) xmp; 184996c772fSJohn Dyson vfs_getnewfsid(mp); 185df8bae1dSRodney W. Grimes 1869fcc512cSMaxime Henrion (void) copystr(target, mp->mnt_stat.f_mntfromname, 187aa56d911SMatt Jacob MNAMELEN - 1, &size); 188df8bae1dSRodney W. Grimes bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 189b40ce416SJulian Elischer (void)nullfs_statfs(mp, &mp->mnt_stat, td); 1908da80660SBoris Popov NULLFSDEBUG("nullfs_mount: lower %s, alias at %s\n", 191df8bae1dSRodney W. Grimes mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname); 192df8bae1dSRodney W. Grimes return (0); 193df8bae1dSRodney W. Grimes } 194df8bae1dSRodney W. Grimes 195df8bae1dSRodney W. Grimes /* 196df8bae1dSRodney W. Grimes * VFS start. Nothing needed here - the start routine 197df8bae1dSRodney W. Grimes * on the underlying filesystem will have been called 198df8bae1dSRodney W. Grimes * when that filesystem was mounted. 199df8bae1dSRodney W. Grimes */ 200d4b7a369SPoul-Henning Kamp static int 201b40ce416SJulian Elischer nullfs_start(mp, flags, td) 202df8bae1dSRodney W. Grimes struct mount *mp; 203df8bae1dSRodney W. Grimes int flags; 204b40ce416SJulian Elischer struct thread *td; 205df8bae1dSRodney W. Grimes { 206df8bae1dSRodney W. Grimes return (0); 207b40ce416SJulian Elischer /* return VFS_START(MOUNTTONULLMOUNT(mp)->nullm_vfs, flags, td); */ 208df8bae1dSRodney W. Grimes } 209df8bae1dSRodney W. Grimes 210df8bae1dSRodney W. Grimes /* 211df8bae1dSRodney W. Grimes * Free reference to null layer 212df8bae1dSRodney W. Grimes */ 213d4b7a369SPoul-Henning Kamp static int 214b40ce416SJulian Elischer nullfs_unmount(mp, mntflags, td) 215df8bae1dSRodney W. Grimes struct mount *mp; 216df8bae1dSRodney W. Grimes int mntflags; 217b40ce416SJulian Elischer struct thread *td; 218df8bae1dSRodney W. Grimes { 2198da80660SBoris Popov void *mntdata; 220df8bae1dSRodney W. Grimes int error; 221df8bae1dSRodney W. Grimes int flags = 0; 222df8bae1dSRodney W. Grimes 2238da80660SBoris Popov NULLFSDEBUG("nullfs_unmount: mp = %p\n", (void *)mp); 224df8bae1dSRodney W. Grimes 225996c772fSJohn Dyson if (mntflags & MNT_FORCE) 226df8bae1dSRodney W. Grimes flags |= FORCECLOSE; 227df8bae1dSRodney W. Grimes 2280864ef1eSIan Dowse /* There is 1 extra root vnode reference (nullm_rootvp). */ 229f257b7a5SAlfred Perlstein error = vflush(mp, 1, flags, td); 2303a773ad0SPoul-Henning Kamp if (error) 231df8bae1dSRodney W. Grimes return (error); 232df8bae1dSRodney W. Grimes 233df8bae1dSRodney W. Grimes /* 234df8bae1dSRodney W. Grimes * Finally, throw away the null_mount structure 235df8bae1dSRodney W. Grimes */ 2368da80660SBoris Popov mntdata = mp->mnt_data; 237df8bae1dSRodney W. Grimes mp->mnt_data = 0; 2384451405fSBoris Popov free(mntdata, M_NULLFSMNT); 239df8bae1dSRodney W. Grimes return 0; 240df8bae1dSRodney W. Grimes } 241df8bae1dSRodney W. Grimes 242d4b7a369SPoul-Henning Kamp static int 243f257b7a5SAlfred Perlstein nullfs_root(mp, vpp, td) 244df8bae1dSRodney W. Grimes struct mount *mp; 245df8bae1dSRodney W. Grimes struct vnode **vpp; 246f257b7a5SAlfred Perlstein struct thread *td; 247df8bae1dSRodney W. Grimes { 248df8bae1dSRodney W. Grimes struct vnode *vp; 249df8bae1dSRodney W. Grimes 2508da80660SBoris Popov NULLFSDEBUG("nullfs_root(mp = %p, vp = %p->%p)\n", (void *)mp, 25189785a16SBruce Evans (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp, 25289785a16SBruce Evans (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp)); 253df8bae1dSRodney W. Grimes 254df8bae1dSRodney W. Grimes /* 255df8bae1dSRodney W. Grimes * Return locked reference to root. 256df8bae1dSRodney W. Grimes */ 257df8bae1dSRodney W. Grimes vp = MOUNTTONULLMOUNT(mp)->nullm_rootvp; 258df8bae1dSRodney W. Grimes VREF(vp); 2594451405fSBoris Popov 2608da80660SBoris Popov #ifdef NULLFS_DEBUG 2616bdfe06aSEivind Eklund if (VOP_ISLOCKED(vp, NULL)) { 2624ea4f1f9SMarcel Moolenaar kdb_enter("root vnode is locked.\n"); 263747e9157SKATO Takenori vrele(vp); 264747e9157SKATO Takenori return (EDEADLK); 2658da80660SBoris Popov } 2668da80660SBoris Popov #endif 267b40ce416SJulian Elischer vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 268df8bae1dSRodney W. Grimes *vpp = vp; 269df8bae1dSRodney W. Grimes return 0; 270df8bae1dSRodney W. Grimes } 271df8bae1dSRodney W. Grimes 272d4b7a369SPoul-Henning Kamp static int 273b40ce416SJulian Elischer nullfs_quotactl(mp, cmd, uid, arg, td) 274df8bae1dSRodney W. Grimes struct mount *mp; 275df8bae1dSRodney W. Grimes int cmd; 276df8bae1dSRodney W. Grimes uid_t uid; 277df8bae1dSRodney W. Grimes caddr_t arg; 278b40ce416SJulian Elischer struct thread *td; 279df8bae1dSRodney W. Grimes { 280b40ce416SJulian Elischer return VFS_QUOTACTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd, uid, arg, td); 281df8bae1dSRodney W. Grimes } 282df8bae1dSRodney W. Grimes 283d4b7a369SPoul-Henning Kamp static int 284b40ce416SJulian Elischer nullfs_statfs(mp, sbp, td) 285df8bae1dSRodney W. Grimes struct mount *mp; 286df8bae1dSRodney W. Grimes struct statfs *sbp; 287b40ce416SJulian Elischer struct thread *td; 288df8bae1dSRodney W. Grimes { 289df8bae1dSRodney W. Grimes int error; 290df8bae1dSRodney W. Grimes struct statfs mstat; 291df8bae1dSRodney W. Grimes 2928da80660SBoris Popov NULLFSDEBUG("nullfs_statfs(mp = %p, vp = %p->%p)\n", (void *)mp, 29389785a16SBruce Evans (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp, 29489785a16SBruce Evans (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp)); 295df8bae1dSRodney W. Grimes 296df8bae1dSRodney W. Grimes bzero(&mstat, sizeof(mstat)); 297df8bae1dSRodney W. Grimes 298b40ce416SJulian Elischer error = VFS_STATFS(MOUNTTONULLMOUNT(mp)->nullm_vfs, &mstat, td); 299df8bae1dSRodney W. Grimes if (error) 300df8bae1dSRodney W. Grimes return (error); 301df8bae1dSRodney W. Grimes 302df8bae1dSRodney W. Grimes /* now copy across the "interesting" information and fake the rest */ 303df8bae1dSRodney W. Grimes sbp->f_type = mstat.f_type; 304df8bae1dSRodney W. Grimes sbp->f_flags = mstat.f_flags; 305df8bae1dSRodney W. Grimes sbp->f_bsize = mstat.f_bsize; 306df8bae1dSRodney W. Grimes sbp->f_iosize = mstat.f_iosize; 307df8bae1dSRodney W. Grimes sbp->f_blocks = mstat.f_blocks; 308df8bae1dSRodney W. Grimes sbp->f_bfree = mstat.f_bfree; 309df8bae1dSRodney W. Grimes sbp->f_bavail = mstat.f_bavail; 310df8bae1dSRodney W. Grimes sbp->f_files = mstat.f_files; 311df8bae1dSRodney W. Grimes sbp->f_ffree = mstat.f_ffree; 312df8bae1dSRodney W. Grimes if (sbp != &mp->mnt_stat) { 313df8bae1dSRodney W. Grimes bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); 314df8bae1dSRodney W. Grimes bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 315df8bae1dSRodney W. Grimes bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 316df8bae1dSRodney W. Grimes } 317df8bae1dSRodney W. Grimes return (0); 318df8bae1dSRodney W. Grimes } 319df8bae1dSRodney W. Grimes 320d4b7a369SPoul-Henning Kamp static int 321b40ce416SJulian Elischer nullfs_sync(mp, waitfor, cred, td) 322df8bae1dSRodney W. Grimes struct mount *mp; 323df8bae1dSRodney W. Grimes int waitfor; 324df8bae1dSRodney W. Grimes struct ucred *cred; 325b40ce416SJulian Elischer struct thread *td; 326df8bae1dSRodney W. Grimes { 327df8bae1dSRodney W. Grimes /* 328df8bae1dSRodney W. Grimes * XXX - Assumes no data cached at null layer. 329df8bae1dSRodney W. Grimes */ 330df8bae1dSRodney W. Grimes return (0); 331df8bae1dSRodney W. Grimes } 332df8bae1dSRodney W. Grimes 333d4b7a369SPoul-Henning Kamp static int 334a0595d02SKirk McKusick nullfs_vget(mp, ino, flags, vpp) 335df8bae1dSRodney W. Grimes struct mount *mp; 336df8bae1dSRodney W. Grimes ino_t ino; 337a0595d02SKirk McKusick int flags; 338df8bae1dSRodney W. Grimes struct vnode **vpp; 339df8bae1dSRodney W. Grimes { 3404451405fSBoris Popov int error; 341a0595d02SKirk McKusick error = VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, flags, vpp); 3424451405fSBoris Popov if (error) 3434451405fSBoris Popov return (error); 344df8bae1dSRodney W. Grimes 3451cfdefbbSSemen Ustimenko return (null_nodeget(mp, *vpp, vpp)); 346df8bae1dSRodney W. Grimes } 347df8bae1dSRodney W. Grimes 348d4b7a369SPoul-Henning Kamp static int 349c24fda81SAlfred Perlstein nullfs_fhtovp(mp, fidp, vpp) 350df8bae1dSRodney W. Grimes struct mount *mp; 351df8bae1dSRodney W. Grimes struct fid *fidp; 352df8bae1dSRodney W. Grimes struct vnode **vpp; 353c24fda81SAlfred Perlstein { 3544451405fSBoris Popov int error; 3554451405fSBoris Popov error = VFS_FHTOVP(MOUNTTONULLMOUNT(mp)->nullm_vfs, fidp, vpp); 3564451405fSBoris Popov if (error) 3574451405fSBoris Popov return (error); 358c24fda81SAlfred Perlstein 3591cfdefbbSSemen Ustimenko return (null_nodeget(mp, *vpp, vpp)); 360c24fda81SAlfred Perlstein } 361c24fda81SAlfred Perlstein 362c24fda81SAlfred Perlstein static int 363c24fda81SAlfred Perlstein nullfs_checkexp(mp, nam, extflagsp, credanonp) 364c24fda81SAlfred Perlstein struct mount *mp; 365c24fda81SAlfred Perlstein struct sockaddr *nam; 366c24fda81SAlfred Perlstein int *extflagsp; 367df8bae1dSRodney W. Grimes struct ucred **credanonp; 368df8bae1dSRodney W. Grimes { 369df8bae1dSRodney W. Grimes 370c24fda81SAlfred Perlstein return VFS_CHECKEXP(MOUNTTONULLMOUNT(mp)->nullm_vfs, nam, 371c24fda81SAlfred Perlstein extflagsp, credanonp); 372df8bae1dSRodney W. Grimes } 373df8bae1dSRodney W. Grimes 374d4b7a369SPoul-Henning Kamp static int 375df8bae1dSRodney W. Grimes nullfs_vptofh(vp, fhp) 376df8bae1dSRodney W. Grimes struct vnode *vp; 377df8bae1dSRodney W. Grimes struct fid *fhp; 378df8bae1dSRodney W. Grimes { 379ff81e317SPoul-Henning Kamp struct vnode *lvp; 380ff81e317SPoul-Henning Kamp 381ff81e317SPoul-Henning Kamp lvp = NULLVPTOLOWERVP(vp); 382ff81e317SPoul-Henning Kamp return VFS_VPTOFH(lvp, fhp); 383df8bae1dSRodney W. Grimes } 384df8bae1dSRodney W. Grimes 38591f37dcbSRobert Watson static int 386b40ce416SJulian Elischer nullfs_extattrctl(mp, cmd, filename_vp, namespace, attrname, td) 38791f37dcbSRobert Watson struct mount *mp; 38891f37dcbSRobert Watson int cmd; 38970f36851SRobert Watson struct vnode *filename_vp; 39070f36851SRobert Watson int namespace; 3918f073875SRobert Watson const char *attrname; 392b40ce416SJulian Elischer struct thread *td; 39391f37dcbSRobert Watson { 39470f36851SRobert Watson return VFS_EXTATTRCTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd, filename_vp, 395b40ce416SJulian Elischer namespace, attrname, td); 39691f37dcbSRobert Watson } 39791f37dcbSRobert Watson 39891f37dcbSRobert Watson 399d4b7a369SPoul-Henning Kamp static struct vfsops null_vfsops = { 4007652131bSPoul-Henning Kamp .vfs_checkexp = nullfs_checkexp, 4017652131bSPoul-Henning Kamp .vfs_extattrctl = nullfs_extattrctl, 4027652131bSPoul-Henning Kamp .vfs_fhtovp = nullfs_fhtovp, 4037652131bSPoul-Henning Kamp .vfs_init = nullfs_init, 4045e8c582aSPoul-Henning Kamp .vfs_mount = nullfs_mount, 4057652131bSPoul-Henning Kamp .vfs_quotactl = nullfs_quotactl, 4067652131bSPoul-Henning Kamp .vfs_root = nullfs_root, 4077652131bSPoul-Henning Kamp .vfs_start = nullfs_start, 4087652131bSPoul-Henning Kamp .vfs_statfs = nullfs_statfs, 4097652131bSPoul-Henning Kamp .vfs_sync = nullfs_sync, 4107652131bSPoul-Henning Kamp .vfs_uninit = nullfs_uninit, 4117652131bSPoul-Henning Kamp .vfs_unmount = nullfs_unmount, 4127652131bSPoul-Henning Kamp .vfs_vget = nullfs_vget, 4137652131bSPoul-Henning Kamp .vfs_vptofh = nullfs_vptofh, 414df8bae1dSRodney W. Grimes }; 415c901836cSGarrett Wollman 4161b2fbe6fSSheldon Hearn VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK); 417