17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 58f71b825Sowenr * Common Development and Distribution License (the "License"). 68f71b825Sowenr * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 2259cbbcadSsjelinek * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate #include <sys/param.h> 297c478bd9Sstevel@tonic-gate #include <sys/systm.h> 307c478bd9Sstevel@tonic-gate #include <sys/errno.h> 317c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 327c478bd9Sstevel@tonic-gate #include <sys/vfs.h> 337c478bd9Sstevel@tonic-gate #include <sys/uio.h> 347c478bd9Sstevel@tonic-gate #include <sys/cred.h> 357c478bd9Sstevel@tonic-gate #include <sys/pathname.h> 367c478bd9Sstevel@tonic-gate #include <sys/debug.h> 377c478bd9Sstevel@tonic-gate #include <sys/fs/lofs_node.h> 387c478bd9Sstevel@tonic-gate #include <sys/fs/lofs_info.h> 397c478bd9Sstevel@tonic-gate #include <fs/fs_subr.h> 407c478bd9Sstevel@tonic-gate #include <vm/as.h> 417c478bd9Sstevel@tonic-gate #include <vm/seg.h> 427c478bd9Sstevel@tonic-gate 437c478bd9Sstevel@tonic-gate /* 447c478bd9Sstevel@tonic-gate * These are the vnode ops routines which implement the vnode interface to 457c478bd9Sstevel@tonic-gate * the looped-back file system. These routines just take their parameters, 467c478bd9Sstevel@tonic-gate * and then calling the appropriate real vnode routine(s) to do the work. 477c478bd9Sstevel@tonic-gate */ 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate static int 507c478bd9Sstevel@tonic-gate lo_open(vnode_t **vpp, int flag, struct cred *cr) 517c478bd9Sstevel@tonic-gate { 527c478bd9Sstevel@tonic-gate vnode_t *vp = *vpp; 537c478bd9Sstevel@tonic-gate vnode_t *rvp; 547c478bd9Sstevel@tonic-gate vnode_t *oldvp; 557c478bd9Sstevel@tonic-gate int error; 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate #ifdef LODEBUG 587c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_open vp %p cnt=%d realvp %p cnt=%d\n", 597c478bd9Sstevel@tonic-gate vp, vp->v_count, realvp(vp), realvp(vp)->v_count); 607c478bd9Sstevel@tonic-gate #endif 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate oldvp = vp; 637c478bd9Sstevel@tonic-gate vp = rvp = realvp(vp); 647c478bd9Sstevel@tonic-gate /* 657c478bd9Sstevel@tonic-gate * Need to hold new reference to vp since VOP_OPEN() may 667c478bd9Sstevel@tonic-gate * decide to release it. 677c478bd9Sstevel@tonic-gate */ 687c478bd9Sstevel@tonic-gate VN_HOLD(vp); 697c478bd9Sstevel@tonic-gate error = VOP_OPEN(&rvp, flag, cr); 707c478bd9Sstevel@tonic-gate 717c478bd9Sstevel@tonic-gate if (!error && rvp != vp) { 727c478bd9Sstevel@tonic-gate /* 737c478bd9Sstevel@tonic-gate * the FS which we called should have released the 747c478bd9Sstevel@tonic-gate * new reference on vp 757c478bd9Sstevel@tonic-gate */ 76b431137cSowenr *vpp = makelonode(rvp, vtoli(oldvp->v_vfsp), 0); 778f71b825Sowenr if ((*vpp)->v_type == VDIR) { 788f71b825Sowenr /* 798f71b825Sowenr * Copy over any looping flags to the new lnode. 808f71b825Sowenr */ 818f71b825Sowenr (vtol(*vpp))->lo_looping |= (vtol(oldvp))->lo_looping; 828f71b825Sowenr } 837c478bd9Sstevel@tonic-gate if (IS_DEVVP(*vpp)) { 847c478bd9Sstevel@tonic-gate vnode_t *svp; 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 877c478bd9Sstevel@tonic-gate VN_RELE(*vpp); 887c478bd9Sstevel@tonic-gate if (svp == NULL) 897c478bd9Sstevel@tonic-gate error = ENOSYS; 907c478bd9Sstevel@tonic-gate else 917c478bd9Sstevel@tonic-gate *vpp = svp; 927c478bd9Sstevel@tonic-gate } 937c478bd9Sstevel@tonic-gate VN_RELE(oldvp); 947c478bd9Sstevel@tonic-gate } else { 957c478bd9Sstevel@tonic-gate ASSERT(rvp->v_count > 1); 967c478bd9Sstevel@tonic-gate VN_RELE(rvp); 977c478bd9Sstevel@tonic-gate } 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate return (error); 1007c478bd9Sstevel@tonic-gate } 1017c478bd9Sstevel@tonic-gate 1027c478bd9Sstevel@tonic-gate static int 1037c478bd9Sstevel@tonic-gate lo_close( 1047c478bd9Sstevel@tonic-gate vnode_t *vp, 1057c478bd9Sstevel@tonic-gate int flag, 1067c478bd9Sstevel@tonic-gate int count, 1077c478bd9Sstevel@tonic-gate offset_t offset, 1087c478bd9Sstevel@tonic-gate struct cred *cr) 1097c478bd9Sstevel@tonic-gate { 1107c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1117c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_close vp %p realvp %p\n", vp, realvp(vp)); 1127c478bd9Sstevel@tonic-gate #endif 1137c478bd9Sstevel@tonic-gate vp = realvp(vp); 1147c478bd9Sstevel@tonic-gate return (VOP_CLOSE(vp, flag, count, offset, cr)); 1157c478bd9Sstevel@tonic-gate } 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate static int 1187c478bd9Sstevel@tonic-gate lo_read(vnode_t *vp, struct uio *uiop, int ioflag, struct cred *cr, 1197c478bd9Sstevel@tonic-gate caller_context_t *ct) 1207c478bd9Sstevel@tonic-gate { 1217c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1227c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_read vp %p realvp %p\n", vp, realvp(vp)); 1237c478bd9Sstevel@tonic-gate #endif 1247c478bd9Sstevel@tonic-gate vp = realvp(vp); 1257c478bd9Sstevel@tonic-gate return (VOP_READ(vp, uiop, ioflag, cr, ct)); 1267c478bd9Sstevel@tonic-gate } 1277c478bd9Sstevel@tonic-gate 1287c478bd9Sstevel@tonic-gate static int 1297c478bd9Sstevel@tonic-gate lo_write(vnode_t *vp, struct uio *uiop, int ioflag, struct cred *cr, 1307c478bd9Sstevel@tonic-gate caller_context_t *ct) 1317c478bd9Sstevel@tonic-gate { 1327c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1337c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_write vp %p realvp %p\n", vp, realvp(vp)); 1347c478bd9Sstevel@tonic-gate #endif 1357c478bd9Sstevel@tonic-gate vp = realvp(vp); 1367c478bd9Sstevel@tonic-gate return (VOP_WRITE(vp, uiop, ioflag, cr, ct)); 1377c478bd9Sstevel@tonic-gate } 1387c478bd9Sstevel@tonic-gate 1397c478bd9Sstevel@tonic-gate static int 1407c478bd9Sstevel@tonic-gate lo_ioctl( 1417c478bd9Sstevel@tonic-gate vnode_t *vp, 1427c478bd9Sstevel@tonic-gate int cmd, 1437c478bd9Sstevel@tonic-gate intptr_t arg, 1447c478bd9Sstevel@tonic-gate int flag, 1457c478bd9Sstevel@tonic-gate struct cred *cr, 1467c478bd9Sstevel@tonic-gate int *rvalp) 1477c478bd9Sstevel@tonic-gate { 1487c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1497c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_ioctl vp %p realvp %p\n", vp, realvp(vp)); 1507c478bd9Sstevel@tonic-gate #endif 1517c478bd9Sstevel@tonic-gate vp = realvp(vp); 1527c478bd9Sstevel@tonic-gate return (VOP_IOCTL(vp, cmd, arg, flag, cr, rvalp)); 1537c478bd9Sstevel@tonic-gate } 1547c478bd9Sstevel@tonic-gate 1557c478bd9Sstevel@tonic-gate static int 1567c478bd9Sstevel@tonic-gate lo_setfl(vnode_t *vp, int oflags, int nflags, cred_t *cr) 1577c478bd9Sstevel@tonic-gate { 1587c478bd9Sstevel@tonic-gate vp = realvp(vp); 1597c478bd9Sstevel@tonic-gate return (VOP_SETFL(vp, oflags, nflags, cr)); 1607c478bd9Sstevel@tonic-gate } 1617c478bd9Sstevel@tonic-gate 1627c478bd9Sstevel@tonic-gate static int 1637c478bd9Sstevel@tonic-gate lo_getattr( 1647c478bd9Sstevel@tonic-gate vnode_t *vp, 1657c478bd9Sstevel@tonic-gate struct vattr *vap, 1667c478bd9Sstevel@tonic-gate int flags, 1677c478bd9Sstevel@tonic-gate struct cred *cr) 1687c478bd9Sstevel@tonic-gate { 1697c478bd9Sstevel@tonic-gate int error; 1707c478bd9Sstevel@tonic-gate 1717c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1727c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_getattr vp %p realvp %p\n", vp, realvp(vp)); 1737c478bd9Sstevel@tonic-gate #endif 1747c478bd9Sstevel@tonic-gate if (error = VOP_GETATTR(realvp(vp), vap, flags, cr)) 1757c478bd9Sstevel@tonic-gate return (error); 1767c478bd9Sstevel@tonic-gate 1777c478bd9Sstevel@tonic-gate return (0); 1787c478bd9Sstevel@tonic-gate } 1797c478bd9Sstevel@tonic-gate 1807c478bd9Sstevel@tonic-gate static int 1817c478bd9Sstevel@tonic-gate lo_setattr( 1827c478bd9Sstevel@tonic-gate vnode_t *vp, 1837c478bd9Sstevel@tonic-gate struct vattr *vap, 1847c478bd9Sstevel@tonic-gate int flags, 1857c478bd9Sstevel@tonic-gate struct cred *cr, 1867c478bd9Sstevel@tonic-gate caller_context_t *ct) 1877c478bd9Sstevel@tonic-gate { 1887c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1897c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_setattr vp %p realvp %p\n", vp, realvp(vp)); 1907c478bd9Sstevel@tonic-gate #endif 1917c478bd9Sstevel@tonic-gate vp = realvp(vp); 1927c478bd9Sstevel@tonic-gate return (VOP_SETATTR(vp, vap, flags, cr, ct)); 1937c478bd9Sstevel@tonic-gate } 1947c478bd9Sstevel@tonic-gate 1957c478bd9Sstevel@tonic-gate static int 1967c478bd9Sstevel@tonic-gate lo_access(vnode_t *vp, int mode, int flags, struct cred *cr) 1977c478bd9Sstevel@tonic-gate { 1987c478bd9Sstevel@tonic-gate #ifdef LODEBUG 1997c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_access vp %p realvp %p\n", vp, realvp(vp)); 2007c478bd9Sstevel@tonic-gate #endif 2017c478bd9Sstevel@tonic-gate if (mode & VWRITE) { 2027c478bd9Sstevel@tonic-gate if (vp->v_type == VREG && vn_is_readonly(vp)) 2037c478bd9Sstevel@tonic-gate return (EROFS); 2047c478bd9Sstevel@tonic-gate } 2057c478bd9Sstevel@tonic-gate vp = realvp(vp); 2067c478bd9Sstevel@tonic-gate return (VOP_ACCESS(vp, mode, flags, cr)); 2077c478bd9Sstevel@tonic-gate } 2087c478bd9Sstevel@tonic-gate 2097c478bd9Sstevel@tonic-gate static int 2107c478bd9Sstevel@tonic-gate lo_fsync(vnode_t *vp, int syncflag, struct cred *cr) 2117c478bd9Sstevel@tonic-gate { 2127c478bd9Sstevel@tonic-gate #ifdef LODEBUG 2137c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_fsync vp %p realvp %p\n", vp, realvp(vp)); 2147c478bd9Sstevel@tonic-gate #endif 2157c478bd9Sstevel@tonic-gate vp = realvp(vp); 2167c478bd9Sstevel@tonic-gate return (VOP_FSYNC(vp, syncflag, cr)); 2177c478bd9Sstevel@tonic-gate } 2187c478bd9Sstevel@tonic-gate 2197c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 2207c478bd9Sstevel@tonic-gate static void 2217c478bd9Sstevel@tonic-gate lo_inactive(vnode_t *vp, struct cred *cr) 2227c478bd9Sstevel@tonic-gate { 2237c478bd9Sstevel@tonic-gate #ifdef LODEBUG 2247c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_inactive %p, realvp %p\n", vp, realvp(vp)); 2257c478bd9Sstevel@tonic-gate #endif 2267c478bd9Sstevel@tonic-gate freelonode(vtol(vp)); 2277c478bd9Sstevel@tonic-gate } 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate /* ARGSUSED */ 2307c478bd9Sstevel@tonic-gate static int 2317c478bd9Sstevel@tonic-gate lo_fid(vnode_t *vp, struct fid *fidp) 2327c478bd9Sstevel@tonic-gate { 2337c478bd9Sstevel@tonic-gate #ifdef LODEBUG 2347c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_fid %p, realvp %p\n", vp, realvp(vp)); 2357c478bd9Sstevel@tonic-gate #endif 2367c478bd9Sstevel@tonic-gate vp = realvp(vp); 2377c478bd9Sstevel@tonic-gate return (VOP_FID(vp, fidp)); 2387c478bd9Sstevel@tonic-gate } 2397c478bd9Sstevel@tonic-gate 2407c478bd9Sstevel@tonic-gate /* 2417c478bd9Sstevel@tonic-gate * Given a vnode of lofs type, lookup nm name and 2427c478bd9Sstevel@tonic-gate * return a shadow vnode (of lofs type) of the 2437c478bd9Sstevel@tonic-gate * real vnode found. 2447c478bd9Sstevel@tonic-gate * 2457c478bd9Sstevel@tonic-gate * Due to the nature of lofs, there is a potential 2467c478bd9Sstevel@tonic-gate * looping in path traversal. 2477c478bd9Sstevel@tonic-gate * 2487c478bd9Sstevel@tonic-gate * starting from the mount point of an lofs; 2497c478bd9Sstevel@tonic-gate * a loop is defined to be a traversal path 2507c478bd9Sstevel@tonic-gate * where the mount point or the real vnode of 2517c478bd9Sstevel@tonic-gate * the root of this lofs is encountered twice. 2527c478bd9Sstevel@tonic-gate * Once at the start of traversal and second 2537c478bd9Sstevel@tonic-gate * when the looping is found. 2547c478bd9Sstevel@tonic-gate * 2557c478bd9Sstevel@tonic-gate * When a loop is encountered, a shadow of the 2567c478bd9Sstevel@tonic-gate * covered vnode is returned to stop the looping. 2577c478bd9Sstevel@tonic-gate * 2587c478bd9Sstevel@tonic-gate * This normally works, but with the advent of 2597c478bd9Sstevel@tonic-gate * the new automounter, returning the shadow of the 2607c478bd9Sstevel@tonic-gate * covered vnode (autonode, in this case) does not 2617c478bd9Sstevel@tonic-gate * stop the loop. Because further lookup on this 2627c478bd9Sstevel@tonic-gate * lonode will cause the autonode to call lo_lookup() 2637c478bd9Sstevel@tonic-gate * on the lonode covering it. 2647c478bd9Sstevel@tonic-gate * 2657c478bd9Sstevel@tonic-gate * example "/net/jurassic/net/jurassic" is a loop. 2667c478bd9Sstevel@tonic-gate * returning the shadow of the autonode corresponding to 2677c478bd9Sstevel@tonic-gate * "/net/jurassic/net/jurassic" will not terminate the 2687c478bd9Sstevel@tonic-gate * loop. To solve this problem we allow the loop to go 269b431137cSowenr * through one more level component lookup. Whichever 270b431137cSowenr * directory is then looked up in "/net/jurassic/net/jurassic" 271b431137cSowenr * the vnode returned is the vnode covered by the autonode 272b431137cSowenr * "net" and this will terminate the loop. 2737c478bd9Sstevel@tonic-gate * 2747c478bd9Sstevel@tonic-gate * Lookup for dot dot has to be dealt with separately. 2757c478bd9Sstevel@tonic-gate * It will be nice to have a "one size fits all" kind 2767c478bd9Sstevel@tonic-gate * of solution, so that we don't have so many ifs statement 2777c478bd9Sstevel@tonic-gate * in the lo_lookup() to handle dotdot. But, since 2787c478bd9Sstevel@tonic-gate * there are so many special cases to handle different 2797c478bd9Sstevel@tonic-gate * kinds looping above, we need special codes to handle 2807c478bd9Sstevel@tonic-gate * dotdot lookup as well. 2817c478bd9Sstevel@tonic-gate */ 2827c478bd9Sstevel@tonic-gate static int 2837c478bd9Sstevel@tonic-gate lo_lookup( 2847c478bd9Sstevel@tonic-gate vnode_t *dvp, 2857c478bd9Sstevel@tonic-gate char *nm, 2867c478bd9Sstevel@tonic-gate vnode_t **vpp, 2877c478bd9Sstevel@tonic-gate struct pathname *pnp, 2887c478bd9Sstevel@tonic-gate int flags, 2897c478bd9Sstevel@tonic-gate vnode_t *rdir, 2907c478bd9Sstevel@tonic-gate struct cred *cr) 2917c478bd9Sstevel@tonic-gate { 2927c478bd9Sstevel@tonic-gate vnode_t *vp = NULL, *tvp = NULL, *nonlovp; 2937c478bd9Sstevel@tonic-gate int error, is_indirectloop; 2947c478bd9Sstevel@tonic-gate vnode_t *realdvp = realvp(dvp); 2957c478bd9Sstevel@tonic-gate struct loinfo *li = vtoli(dvp->v_vfsp); 2967c478bd9Sstevel@tonic-gate int looping = 0; 297b431137cSowenr int autoloop = 0; 2987c478bd9Sstevel@tonic-gate int doingdotdot = 0; 2997c478bd9Sstevel@tonic-gate int nosub = 0; 300b431137cSowenr int mkflag = 0; 3017c478bd9Sstevel@tonic-gate 3027c478bd9Sstevel@tonic-gate /* 3037c478bd9Sstevel@tonic-gate * If name is empty and no XATTR flags are set, then return 3047c478bd9Sstevel@tonic-gate * dvp (empty name == lookup "."). If an XATTR flag is set 3057c478bd9Sstevel@tonic-gate * then we need to call VOP_LOOKUP to get the xattr dir. 3067c478bd9Sstevel@tonic-gate */ 3077c478bd9Sstevel@tonic-gate if (nm[0] == '\0' && ! (flags & (CREATE_XATTR_DIR|LOOKUP_XATTR))) { 3087c478bd9Sstevel@tonic-gate VN_HOLD(dvp); 3097c478bd9Sstevel@tonic-gate *vpp = dvp; 3107c478bd9Sstevel@tonic-gate return (0); 3117c478bd9Sstevel@tonic-gate } 3127c478bd9Sstevel@tonic-gate 3137c478bd9Sstevel@tonic-gate if (nm[0] == '.' && nm[1] == '.' && nm[2] == '\0') { 3147c478bd9Sstevel@tonic-gate doingdotdot++; 3157c478bd9Sstevel@tonic-gate /* 3167c478bd9Sstevel@tonic-gate * Handle ".." out of mounted filesystem 3177c478bd9Sstevel@tonic-gate */ 3187c478bd9Sstevel@tonic-gate while ((realdvp->v_flag & VROOT) && realdvp != rootdir) { 3197c478bd9Sstevel@tonic-gate realdvp = realdvp->v_vfsp->vfs_vnodecovered; 3207c478bd9Sstevel@tonic-gate ASSERT(realdvp != NULL); 3217c478bd9Sstevel@tonic-gate } 3227c478bd9Sstevel@tonic-gate } 3237c478bd9Sstevel@tonic-gate 3247c478bd9Sstevel@tonic-gate *vpp = NULL; /* default(error) case */ 3257c478bd9Sstevel@tonic-gate 3267c478bd9Sstevel@tonic-gate /* 3277c478bd9Sstevel@tonic-gate * Do the normal lookup 3287c478bd9Sstevel@tonic-gate */ 329d13f2f50Smarks if (error = VOP_LOOKUP(realdvp, nm, &vp, pnp, flags, rdir, cr)) { 330d13f2f50Smarks vp = NULL; 3317c478bd9Sstevel@tonic-gate goto out; 332d13f2f50Smarks } 3337c478bd9Sstevel@tonic-gate 3347c478bd9Sstevel@tonic-gate /* 3357c478bd9Sstevel@tonic-gate * We do this check here to avoid returning a stale file handle to the 3367c478bd9Sstevel@tonic-gate * caller. 3377c478bd9Sstevel@tonic-gate */ 3387c478bd9Sstevel@tonic-gate if (nm[0] == '.' && nm[1] == '\0') { 3397c478bd9Sstevel@tonic-gate ASSERT(vp == realdvp); 3407c478bd9Sstevel@tonic-gate VN_HOLD(dvp); 3417c478bd9Sstevel@tonic-gate VN_RELE(vp); 3427c478bd9Sstevel@tonic-gate *vpp = dvp; 3437c478bd9Sstevel@tonic-gate return (0); 3447c478bd9Sstevel@tonic-gate } 3457c478bd9Sstevel@tonic-gate 3467c478bd9Sstevel@tonic-gate if (doingdotdot) { 347b431137cSowenr if ((vtol(dvp))->lo_looping & LO_LOOPING) { 3487c478bd9Sstevel@tonic-gate vfs_t *vfsp; 3497c478bd9Sstevel@tonic-gate 35095b97885Snr error = vn_vfsrlock_wait(realdvp); 3517c478bd9Sstevel@tonic-gate if (error) 3527c478bd9Sstevel@tonic-gate goto out; 3537c478bd9Sstevel@tonic-gate vfsp = vn_mountedvfs(realdvp); 354b431137cSowenr /* 355b431137cSowenr * In the standard case if the looping flag is set and 356b431137cSowenr * performing dotdot we would be returning from a 357b431137cSowenr * covered vnode, implying vfsp could not be null. The 358b431137cSowenr * exceptions being if we have looping and overlay 359b431137cSowenr * mounts or looping and covered file systems. 360b431137cSowenr */ 361b431137cSowenr if (vfsp == NULL) { 3627c478bd9Sstevel@tonic-gate /* 363b431137cSowenr * Overlay mount or covered file system, 364b431137cSowenr * so just make the shadow node. 3657c478bd9Sstevel@tonic-gate */ 3667c478bd9Sstevel@tonic-gate vn_vfsunlock(realdvp); 367b431137cSowenr *vpp = makelonode(vp, li, 0); 368b431137cSowenr (vtol(*vpp))->lo_looping |= LO_LOOPING; 369b431137cSowenr return (0); 370b431137cSowenr } 371b431137cSowenr /* 372b431137cSowenr * When looping get the actual found vnode 373b431137cSowenr * instead of the vnode covered. 374b431137cSowenr * Here we have to hold the lock for realdvp 375b431137cSowenr * since an unmount during the traversal to the 376b431137cSowenr * root vnode would turn *vfsp into garbage 377b431137cSowenr * which would be fatal. 378b431137cSowenr */ 379b431137cSowenr error = VFS_ROOT(vfsp, &tvp); 38095b97885Snr vn_vfsunlock(realdvp); 381b431137cSowenr 382b431137cSowenr if (error) 383b431137cSowenr goto out; 38495b97885Snr 385b431137cSowenr if ((tvp == li->li_rootvp) && (vp == realvp(tvp))) { 3867c478bd9Sstevel@tonic-gate /* 387b431137cSowenr * we're back at the real vnode 388b431137cSowenr * of the rootvp 3897c478bd9Sstevel@tonic-gate * 390b431137cSowenr * return the rootvp 391b431137cSowenr * Ex: /mnt/mnt/.. 392b431137cSowenr * where / has been lofs-mounted 393b431137cSowenr * onto /mnt. Return the lofs 394b431137cSowenr * node mounted at /mnt. 395b431137cSowenr */ 396b431137cSowenr *vpp = tvp; 397b431137cSowenr VN_RELE(vp); 398b431137cSowenr return (0); 399b431137cSowenr } else { 400b431137cSowenr /* 401b431137cSowenr * We are returning from a covered 402b431137cSowenr * node whose vfs_mountedhere is 403b431137cSowenr * not pointing to vfs of the current 404b431137cSowenr * root vnode. 405b431137cSowenr * This is a condn where in we 406b431137cSowenr * returned a covered node say Zc 407b431137cSowenr * but Zc is not the cover of current 408b431137cSowenr * root. 409b431137cSowenr * i.e.., if X is the root vnode 410b431137cSowenr * lookup(Zc,"..") is taking us to 411b431137cSowenr * X. 412b431137cSowenr * Ex: /net/X/net/X/Y 4137c478bd9Sstevel@tonic-gate * 414b431137cSowenr * If LO_AUTOLOOP (autofs/lofs looping detected) 415b431137cSowenr * has been set then we are encountering the 416b431137cSowenr * cover of Y (Y being any directory vnode 417b431137cSowenr * under /net/X/net/X/). 418b431137cSowenr * When performing a dotdot set the 419b431137cSowenr * returned vp to the vnode covered 420b431137cSowenr * by the mounted lofs, ie /net/X/net/X 4217c478bd9Sstevel@tonic-gate */ 422b431137cSowenr VN_RELE(tvp); 423b431137cSowenr if ((vtol(dvp))->lo_looping & LO_AUTOLOOP) { 424b431137cSowenr VN_RELE(vp); 425b431137cSowenr vp = li->li_rootvp; 426b431137cSowenr vp = vp->v_vfsp->vfs_vnodecovered; 4277c478bd9Sstevel@tonic-gate VN_HOLD(vp); 428b431137cSowenr *vpp = makelonode(vp, li, 0); 429b431137cSowenr (vtol(*vpp))->lo_looping |= LO_LOOPING; 430b431137cSowenr return (0); 4317c478bd9Sstevel@tonic-gate } 4327c478bd9Sstevel@tonic-gate } 4337c478bd9Sstevel@tonic-gate } else { 4347c478bd9Sstevel@tonic-gate /* 4357c478bd9Sstevel@tonic-gate * No frills just make the shadow node. 4367c478bd9Sstevel@tonic-gate */ 437b431137cSowenr *vpp = makelonode(vp, li, 0); 4387c478bd9Sstevel@tonic-gate return (0); 4397c478bd9Sstevel@tonic-gate } 4407c478bd9Sstevel@tonic-gate } 4417c478bd9Sstevel@tonic-gate 4427c478bd9Sstevel@tonic-gate nosub = (vtoli(dvp->v_vfsp)->li_flag & LO_NOSUB); 4437c478bd9Sstevel@tonic-gate 4447c478bd9Sstevel@tonic-gate /* 4457c478bd9Sstevel@tonic-gate * If this vnode is mounted on, then we 4467c478bd9Sstevel@tonic-gate * traverse to the vnode which is the root of 4477c478bd9Sstevel@tonic-gate * the mounted file system. 4487c478bd9Sstevel@tonic-gate */ 4497c478bd9Sstevel@tonic-gate if (!nosub && (error = traverse(&vp))) 4507c478bd9Sstevel@tonic-gate goto out; 4517c478bd9Sstevel@tonic-gate 4527c478bd9Sstevel@tonic-gate /* 4537c478bd9Sstevel@tonic-gate * Make a lnode for the real vnode. 4547c478bd9Sstevel@tonic-gate */ 4557c478bd9Sstevel@tonic-gate if (vp->v_type != VDIR || nosub) { 456b431137cSowenr *vpp = makelonode(vp, li, 0); 4577c478bd9Sstevel@tonic-gate if (IS_DEVVP(*vpp)) { 4587c478bd9Sstevel@tonic-gate vnode_t *svp; 4597c478bd9Sstevel@tonic-gate 4607c478bd9Sstevel@tonic-gate svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 4617c478bd9Sstevel@tonic-gate VN_RELE(*vpp); 4627c478bd9Sstevel@tonic-gate if (svp == NULL) 4637c478bd9Sstevel@tonic-gate error = ENOSYS; 4647c478bd9Sstevel@tonic-gate else 4657c478bd9Sstevel@tonic-gate *vpp = svp; 4667c478bd9Sstevel@tonic-gate } 4677c478bd9Sstevel@tonic-gate return (error); 4687c478bd9Sstevel@tonic-gate } 4697c478bd9Sstevel@tonic-gate 4707c478bd9Sstevel@tonic-gate /* 4717c478bd9Sstevel@tonic-gate * if the found vnode (vp) is not of type lofs 4727c478bd9Sstevel@tonic-gate * then we're just going to make a shadow of that 4737c478bd9Sstevel@tonic-gate * vp and get out. 4747c478bd9Sstevel@tonic-gate * 4757c478bd9Sstevel@tonic-gate * If the found vnode (vp) is of lofs type, and 4767c478bd9Sstevel@tonic-gate * we're not doing dotdot, check if we are 4777c478bd9Sstevel@tonic-gate * looping. 4787c478bd9Sstevel@tonic-gate */ 4797c478bd9Sstevel@tonic-gate if (!doingdotdot && vfs_matchops(vp->v_vfsp, lo_vfsops)) { 4807c478bd9Sstevel@tonic-gate /* 4817c478bd9Sstevel@tonic-gate * Check if we're looping, i.e. 4827c478bd9Sstevel@tonic-gate * vp equals the root vp of the lofs, directly 4837c478bd9Sstevel@tonic-gate * or indirectly, return the covered node. 4847c478bd9Sstevel@tonic-gate */ 4857c478bd9Sstevel@tonic-gate 486b431137cSowenr if (!((vtol(dvp))->lo_looping & LO_LOOPING)) { 4877c478bd9Sstevel@tonic-gate if (vp == li->li_rootvp) { 4887c478bd9Sstevel@tonic-gate /* 4897c478bd9Sstevel@tonic-gate * Direct looping condn. 4907c478bd9Sstevel@tonic-gate * Ex:- X is / mounted directory so lookup of 4917c478bd9Sstevel@tonic-gate * /X/X is a direct looping condn. 4927c478bd9Sstevel@tonic-gate */ 4937c478bd9Sstevel@tonic-gate tvp = vp; 4947c478bd9Sstevel@tonic-gate vp = vp->v_vfsp->vfs_vnodecovered; 4957c478bd9Sstevel@tonic-gate VN_HOLD(vp); 4967c478bd9Sstevel@tonic-gate VN_RELE(tvp); 4977c478bd9Sstevel@tonic-gate looping++; 4987c478bd9Sstevel@tonic-gate } else { 4997c478bd9Sstevel@tonic-gate /* 5007c478bd9Sstevel@tonic-gate * Indirect looping can be defined as 5017c478bd9Sstevel@tonic-gate * real lookup returning rootvp of the current 5027c478bd9Sstevel@tonic-gate * tree in any level of recursion. 5037c478bd9Sstevel@tonic-gate * 5047c478bd9Sstevel@tonic-gate * This check is useful if there are multiple 5057c478bd9Sstevel@tonic-gate * levels of lofs indirections. Suppose vnode X 5067c478bd9Sstevel@tonic-gate * in the current lookup has as its real vnode 5077c478bd9Sstevel@tonic-gate * another lofs node. Y = realvp(X) Y should be 5087c478bd9Sstevel@tonic-gate * a lofs node for the check to continue or Y 5097c478bd9Sstevel@tonic-gate * is not the rootvp of X. 5107c478bd9Sstevel@tonic-gate * Ex:- say X and Y are two vnodes 5117c478bd9Sstevel@tonic-gate * say real(Y) is X and real(X) is Z 5127c478bd9Sstevel@tonic-gate * parent vnode for X and Y is Z 5137c478bd9Sstevel@tonic-gate * lookup(Y,"path") say we are looking for Y 5147c478bd9Sstevel@tonic-gate * again under Y and we have to return Yc. 5157c478bd9Sstevel@tonic-gate * but the lookup of Y under Y doesnot return 5167c478bd9Sstevel@tonic-gate * Y the root vnode again here is why. 5177c478bd9Sstevel@tonic-gate * 1. lookup(Y,"path of Y") will go to 5187c478bd9Sstevel@tonic-gate * 2. lookup(real(Y),"path of Y") and then to 5197c478bd9Sstevel@tonic-gate * 3. lookup(real(X),"path of Y"). 5207c478bd9Sstevel@tonic-gate * and now what lookup level 1 sees is the 5217c478bd9Sstevel@tonic-gate * outcome of 2 but the vnode Y is due to 5227c478bd9Sstevel@tonic-gate * lookup(Z,"path of Y") so we have to skip 5237c478bd9Sstevel@tonic-gate * intermediate levels to find if in any level 5247c478bd9Sstevel@tonic-gate * there is a looping. 5257c478bd9Sstevel@tonic-gate */ 5267c478bd9Sstevel@tonic-gate is_indirectloop = 0; 5277c478bd9Sstevel@tonic-gate nonlovp = vp; 5287c478bd9Sstevel@tonic-gate while ( 5297c478bd9Sstevel@tonic-gate vfs_matchops(nonlovp->v_vfsp, lo_vfsops) && 5307c478bd9Sstevel@tonic-gate !(is_indirectloop)) { 5317c478bd9Sstevel@tonic-gate if (li->li_rootvp == nonlovp) { 5327c478bd9Sstevel@tonic-gate is_indirectloop++; 5337c478bd9Sstevel@tonic-gate break; 5347c478bd9Sstevel@tonic-gate } 5357c478bd9Sstevel@tonic-gate nonlovp = realvp(nonlovp); 5367c478bd9Sstevel@tonic-gate } 5377c478bd9Sstevel@tonic-gate 5387c478bd9Sstevel@tonic-gate if (is_indirectloop) { 5397c478bd9Sstevel@tonic-gate VN_RELE(vp); 5407c478bd9Sstevel@tonic-gate vp = nonlovp; 5417c478bd9Sstevel@tonic-gate vp = vp->v_vfsp->vfs_vnodecovered; 5427c478bd9Sstevel@tonic-gate VN_HOLD(vp); 5437c478bd9Sstevel@tonic-gate looping++; 5447c478bd9Sstevel@tonic-gate } 5457c478bd9Sstevel@tonic-gate } 5467c478bd9Sstevel@tonic-gate } else { 5477c478bd9Sstevel@tonic-gate /* 5487c478bd9Sstevel@tonic-gate * come here only because of the interaction between 5497c478bd9Sstevel@tonic-gate * the autofs and lofs. 5507c478bd9Sstevel@tonic-gate * 5517c478bd9Sstevel@tonic-gate * Lookup of "/net/X/net/X" will return a shadow of 5527c478bd9Sstevel@tonic-gate * an autonode X_a which we call X_l. 5537c478bd9Sstevel@tonic-gate * 5547c478bd9Sstevel@tonic-gate * Lookup of anything under X_l, will trigger a call to 5557c478bd9Sstevel@tonic-gate * auto_lookup(X_a,nm) which will eventually call 5567c478bd9Sstevel@tonic-gate * lo_lookup(X_lr,nm) where X_lr is the root vnode of 5577c478bd9Sstevel@tonic-gate * the current lofs. 5587c478bd9Sstevel@tonic-gate * 5597c478bd9Sstevel@tonic-gate * We come here only when we are called with X_l as dvp 5607c478bd9Sstevel@tonic-gate * and look for something underneath. 5617c478bd9Sstevel@tonic-gate * 562b431137cSowenr * Now that an autofs/lofs looping condition has been 563b431137cSowenr * identified any directory vnode contained within 564b431137cSowenr * dvp will be set to the vnode covered by the 565b431137cSowenr * mounted autofs. Thus all directories within dvp 566b431137cSowenr * will appear empty hence teminating the looping. 567b431137cSowenr * The LO_AUTOLOOP flag is set on the returned lonode 568b431137cSowenr * to indicate the termination of the autofs/lofs 569b431137cSowenr * looping. This is required for the correct behaviour 570b431137cSowenr * when performing a dotdot. 5717c478bd9Sstevel@tonic-gate */ 5727c478bd9Sstevel@tonic-gate realdvp = realvp(dvp); 5737c478bd9Sstevel@tonic-gate while (vfs_matchops(realdvp->v_vfsp, lo_vfsops)) { 5747c478bd9Sstevel@tonic-gate realdvp = realvp(realdvp); 5757c478bd9Sstevel@tonic-gate } 5767c478bd9Sstevel@tonic-gate 5777c478bd9Sstevel@tonic-gate error = VFS_ROOT(realdvp->v_vfsp, &tvp); 5787c478bd9Sstevel@tonic-gate if (error) 5797c478bd9Sstevel@tonic-gate goto out; 5807c478bd9Sstevel@tonic-gate /* 5817c478bd9Sstevel@tonic-gate * tvp now contains the rootvp of the vfs of the 582b431137cSowenr * real vnode of dvp. The directory vnode vp is set 583b431137cSowenr * to the covered vnode to terminate looping. No 584b431137cSowenr * distinction is made between any vp as all directory 585b431137cSowenr * vnodes contained in dvp are returned as the covered 586b431137cSowenr * vnode. 5877c478bd9Sstevel@tonic-gate */ 588b431137cSowenr VN_RELE(vp); 5898f71b825Sowenr vp = tvp; /* possibly is an autonode */ 5907c478bd9Sstevel@tonic-gate 591b431137cSowenr /* 592b431137cSowenr * Need to find the covered vnode 593b431137cSowenr */ 5948f71b825Sowenr if (vp->v_vfsp->vfs_vnodecovered == NULL) { 5958f71b825Sowenr /* 5968f71b825Sowenr * We don't have a covered vnode so this isn't 5978f71b825Sowenr * an autonode. To find the autonode simply 5988f71b825Sowenr * find the vnode covered by the lofs rootvp. 5998f71b825Sowenr */ 6008f71b825Sowenr vp = li->li_rootvp; 6018f71b825Sowenr vp = vp->v_vfsp->vfs_vnodecovered; 6028f71b825Sowenr VN_RELE(tvp); 6038f71b825Sowenr error = VFS_ROOT(vp->v_vfsp, &tvp); 6048f71b825Sowenr if (error) 6058f71b825Sowenr goto out; 6068f71b825Sowenr vp = tvp; /* now this is an autonode */ 6078f71b825Sowenr if (vp->v_vfsp->vfs_vnodecovered == NULL) { 6088f71b825Sowenr /* 6098f71b825Sowenr * Still can't find a covered vnode. 6108f71b825Sowenr * Fail the lookup, or we'd loop. 6118f71b825Sowenr */ 6128f71b825Sowenr error = ENOENT; 6138f71b825Sowenr goto out; 6148f71b825Sowenr } 6158f71b825Sowenr } 616b431137cSowenr vp = vp->v_vfsp->vfs_vnodecovered; 617b431137cSowenr VN_HOLD(vp); 618b431137cSowenr VN_RELE(tvp); 619b431137cSowenr /* 620b431137cSowenr * Force the creation of a new lnode even if the hash 621b431137cSowenr * table contains a lnode that references this vnode. 622b431137cSowenr */ 623b431137cSowenr mkflag = LOF_FORCE; 624b431137cSowenr autoloop++; 6257c478bd9Sstevel@tonic-gate } 6267c478bd9Sstevel@tonic-gate } 627b431137cSowenr *vpp = makelonode(vp, li, mkflag); 628b431137cSowenr 629b431137cSowenr if ((looping) || 630b431137cSowenr (((vtol(dvp))->lo_looping & LO_LOOPING) && !doingdotdot)) { 631b431137cSowenr (vtol(*vpp))->lo_looping |= LO_LOOPING; 632b431137cSowenr } 6337c478bd9Sstevel@tonic-gate 634b431137cSowenr if (autoloop) { 635b431137cSowenr (vtol(*vpp))->lo_looping |= LO_AUTOLOOP; 6367c478bd9Sstevel@tonic-gate } 6377c478bd9Sstevel@tonic-gate 6387c478bd9Sstevel@tonic-gate out: 6397c478bd9Sstevel@tonic-gate if (error != 0 && vp != NULL) 6407c478bd9Sstevel@tonic-gate VN_RELE(vp); 6417c478bd9Sstevel@tonic-gate #ifdef LODEBUG 6427c478bd9Sstevel@tonic-gate lo_dprint(4, 6437c478bd9Sstevel@tonic-gate "lo_lookup dvp %x realdvp %x nm '%s' newvp %x real vp %x error %d\n", 6447c478bd9Sstevel@tonic-gate dvp, realvp(dvp), nm, *vpp, vp, error); 6457c478bd9Sstevel@tonic-gate #endif 6467c478bd9Sstevel@tonic-gate return (error); 6477c478bd9Sstevel@tonic-gate } 6487c478bd9Sstevel@tonic-gate 6497c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 6507c478bd9Sstevel@tonic-gate static int 6517c478bd9Sstevel@tonic-gate lo_create( 6527c478bd9Sstevel@tonic-gate vnode_t *dvp, 6537c478bd9Sstevel@tonic-gate char *nm, 6547c478bd9Sstevel@tonic-gate struct vattr *va, 6557c478bd9Sstevel@tonic-gate enum vcexcl exclusive, 6567c478bd9Sstevel@tonic-gate int mode, 6577c478bd9Sstevel@tonic-gate vnode_t **vpp, 6587c478bd9Sstevel@tonic-gate struct cred *cr, 6597c478bd9Sstevel@tonic-gate int flag) 6607c478bd9Sstevel@tonic-gate { 6617c478bd9Sstevel@tonic-gate int error; 6627c478bd9Sstevel@tonic-gate vnode_t *vp = NULL; 6637c478bd9Sstevel@tonic-gate 6647c478bd9Sstevel@tonic-gate #ifdef LODEBUG 6657c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_create vp %p realvp %p\n", dvp, realvp(dvp)); 6667c478bd9Sstevel@tonic-gate #endif 6677c478bd9Sstevel@tonic-gate if (*nm == '\0') { 6687c478bd9Sstevel@tonic-gate ASSERT(vpp && dvp == *vpp); 6697c478bd9Sstevel@tonic-gate vp = realvp(*vpp); 6707c478bd9Sstevel@tonic-gate } 6717c478bd9Sstevel@tonic-gate 6727c478bd9Sstevel@tonic-gate error = VOP_CREATE(realvp(dvp), nm, va, exclusive, mode, &vp, cr, flag); 6737c478bd9Sstevel@tonic-gate if (!error) { 674b431137cSowenr *vpp = makelonode(vp, vtoli(dvp->v_vfsp), 0); 6757c478bd9Sstevel@tonic-gate if (IS_DEVVP(*vpp)) { 6767c478bd9Sstevel@tonic-gate vnode_t *svp; 6777c478bd9Sstevel@tonic-gate 6787c478bd9Sstevel@tonic-gate svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 6797c478bd9Sstevel@tonic-gate VN_RELE(*vpp); 6807c478bd9Sstevel@tonic-gate if (svp == NULL) 6817c478bd9Sstevel@tonic-gate error = ENOSYS; 6827c478bd9Sstevel@tonic-gate else 6837c478bd9Sstevel@tonic-gate *vpp = svp; 6847c478bd9Sstevel@tonic-gate } 6857c478bd9Sstevel@tonic-gate } 6867c478bd9Sstevel@tonic-gate return (error); 6877c478bd9Sstevel@tonic-gate } 6887c478bd9Sstevel@tonic-gate 6897c478bd9Sstevel@tonic-gate static int 6907c478bd9Sstevel@tonic-gate lo_remove(vnode_t *dvp, char *nm, struct cred *cr) 6917c478bd9Sstevel@tonic-gate { 6927c478bd9Sstevel@tonic-gate #ifdef LODEBUG 6937c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_remove vp %p realvp %p\n", dvp, realvp(dvp)); 6947c478bd9Sstevel@tonic-gate #endif 6957c478bd9Sstevel@tonic-gate dvp = realvp(dvp); 6967c478bd9Sstevel@tonic-gate return (VOP_REMOVE(dvp, nm, cr)); 6977c478bd9Sstevel@tonic-gate } 6987c478bd9Sstevel@tonic-gate 6997c478bd9Sstevel@tonic-gate static int 7007c478bd9Sstevel@tonic-gate lo_link(vnode_t *tdvp, vnode_t *vp, char *tnm, struct cred *cr) 7017c478bd9Sstevel@tonic-gate { 702*fa871852Sbatschul vnode_t *realvp; 703*fa871852Sbatschul 7047c478bd9Sstevel@tonic-gate #ifdef LODEBUG 7057c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_link vp %p realvp %p\n", vp, realvp(vp)); 7067c478bd9Sstevel@tonic-gate #endif 70759cbbcadSsjelinek 70859cbbcadSsjelinek /* 70959cbbcadSsjelinek * The source and destination vnodes may be in different lofs 71059cbbcadSsjelinek * filesystems sharing the same underlying filesystem, so we need to 71159cbbcadSsjelinek * make sure that the filesystem containing the source vnode is not 71259cbbcadSsjelinek * mounted read-only (vn_link() has already checked the target vnode). 71359cbbcadSsjelinek * 71459cbbcadSsjelinek * In a situation such as: 71559cbbcadSsjelinek * 71659cbbcadSsjelinek * /data - regular filesystem 71759cbbcadSsjelinek * /foo - lofs mount of /data/foo 71859cbbcadSsjelinek * /bar - read-only lofs mount of /data/bar 71959cbbcadSsjelinek * 72059cbbcadSsjelinek * This disallows a link from /bar/somefile to /foo/somefile, 72159cbbcadSsjelinek * which would otherwise allow changes to somefile on the read-only 72259cbbcadSsjelinek * mounted /bar. 72359cbbcadSsjelinek */ 72459cbbcadSsjelinek 72559cbbcadSsjelinek if (vn_is_readonly(vp)) { 72659cbbcadSsjelinek return (EROFS); 72759cbbcadSsjelinek } 7287c478bd9Sstevel@tonic-gate while (vn_matchops(vp, lo_vnodeops)) { 7297c478bd9Sstevel@tonic-gate vp = realvp(vp); 7307c478bd9Sstevel@tonic-gate } 731*fa871852Sbatschul 732*fa871852Sbatschul /* 733*fa871852Sbatschul * In the case where the source vnode is on another stacking 734*fa871852Sbatschul * filesystem (such as specfs), the loop above will 735*fa871852Sbatschul * terminate before finding the true underlying vnode. 736*fa871852Sbatschul * 737*fa871852Sbatschul * We use VOP_REALVP here to continue the search. 738*fa871852Sbatschul */ 739*fa871852Sbatschul if (VOP_REALVP(vp, &realvp) == 0) 740*fa871852Sbatschul vp = realvp; 741*fa871852Sbatschul 7427c478bd9Sstevel@tonic-gate while (vn_matchops(tdvp, lo_vnodeops)) { 7437c478bd9Sstevel@tonic-gate tdvp = realvp(tdvp); 7447c478bd9Sstevel@tonic-gate } 7457c478bd9Sstevel@tonic-gate if (vp->v_vfsp != tdvp->v_vfsp) 7467c478bd9Sstevel@tonic-gate return (EXDEV); 7477c478bd9Sstevel@tonic-gate return (VOP_LINK(tdvp, vp, tnm, cr)); 7487c478bd9Sstevel@tonic-gate } 7497c478bd9Sstevel@tonic-gate 7507c478bd9Sstevel@tonic-gate static int 7517c478bd9Sstevel@tonic-gate lo_rename( 7527c478bd9Sstevel@tonic-gate vnode_t *odvp, 7537c478bd9Sstevel@tonic-gate char *onm, 7547c478bd9Sstevel@tonic-gate vnode_t *ndvp, 7557c478bd9Sstevel@tonic-gate char *nnm, 7567c478bd9Sstevel@tonic-gate struct cred *cr) 7577c478bd9Sstevel@tonic-gate { 7587c478bd9Sstevel@tonic-gate vnode_t *tnvp; 7597c478bd9Sstevel@tonic-gate 7607c478bd9Sstevel@tonic-gate #ifdef LODEBUG 7617c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_rename vp %p realvp %p\n", odvp, realvp(odvp)); 7627c478bd9Sstevel@tonic-gate #endif 7636bcc12b7Ssjelinek /* 7646bcc12b7Ssjelinek * If we are coming from a loop back mounted fs, that has been 7656bcc12b7Ssjelinek * mounted in the same filesystem as where we want to move to, 7666bcc12b7Ssjelinek * and that filesystem is read/write, but the lofs filesystem is 7676bcc12b7Ssjelinek * read only, we don't want to allow a rename of the file. The 7686bcc12b7Ssjelinek * vn_rename code checks to be sure the target is read/write already 7696bcc12b7Ssjelinek * so that is not necessary here. However, consider the following 7706bcc12b7Ssjelinek * example: 7716bcc12b7Ssjelinek * / - regular root fs 7726bcc12b7Ssjelinek * /foo - directory in root 7736bcc12b7Ssjelinek * /foo/bar - file in foo directory(in root fs) 7746bcc12b7Ssjelinek * /baz - directory in root 7756bcc12b7Ssjelinek * mount -F lofs -o ro /foo /baz - all still in root 7766bcc12b7Ssjelinek * directory 7776bcc12b7Ssjelinek * The fact that we mounted /foo on /baz read only should stop us 7786bcc12b7Ssjelinek * from renaming the file /foo/bar /bar, but it doesn't since 7796bcc12b7Ssjelinek * / is read/write. We are still renaming here since we are still 7806bcc12b7Ssjelinek * in the same filesystem, it is just that we do not check to see 7816bcc12b7Ssjelinek * if the filesystem we are coming from in this case is read only. 7826bcc12b7Ssjelinek */ 7836bcc12b7Ssjelinek if (odvp->v_vfsp->vfs_flag & VFS_RDONLY) 7846bcc12b7Ssjelinek return (EROFS); 7857c478bd9Sstevel@tonic-gate /* 7867c478bd9Sstevel@tonic-gate * We need to make sure we're not trying to remove a mount point for a 7877c478bd9Sstevel@tonic-gate * filesystem mounted on top of lofs, which only we know about. 7887c478bd9Sstevel@tonic-gate */ 7897c478bd9Sstevel@tonic-gate if (vn_matchops(ndvp, lo_vnodeops)) /* Not our problem. */ 7907c478bd9Sstevel@tonic-gate goto rename; 7917c478bd9Sstevel@tonic-gate if (VOP_LOOKUP(ndvp, nnm, &tnvp, NULL, 0, NULL, cr) != 0) 7927c478bd9Sstevel@tonic-gate goto rename; 7937c478bd9Sstevel@tonic-gate if (tnvp->v_type != VDIR) { 7947c478bd9Sstevel@tonic-gate VN_RELE(tnvp); 7957c478bd9Sstevel@tonic-gate goto rename; 7967c478bd9Sstevel@tonic-gate } 7977c478bd9Sstevel@tonic-gate if (vn_mountedvfs(tnvp)) { 7987c478bd9Sstevel@tonic-gate VN_RELE(tnvp); 7997c478bd9Sstevel@tonic-gate return (EBUSY); 8007c478bd9Sstevel@tonic-gate } 8017c478bd9Sstevel@tonic-gate VN_RELE(tnvp); 8027c478bd9Sstevel@tonic-gate rename: 8037c478bd9Sstevel@tonic-gate /* 8047c478bd9Sstevel@tonic-gate * Since the case we're dealing with above can happen at any layer in 8057c478bd9Sstevel@tonic-gate * the stack of lofs filesystems, we need to recurse down the stack, 8067c478bd9Sstevel@tonic-gate * checking to see if there are any instances of a filesystem mounted on 8077c478bd9Sstevel@tonic-gate * top of lofs. In order to keep on using the lofs version of 8087c478bd9Sstevel@tonic-gate * VOP_RENAME(), we make sure that while the target directory is of type 8097c478bd9Sstevel@tonic-gate * lofs, the source directory (the one used for getting the fs-specific 8107c478bd9Sstevel@tonic-gate * version of VOP_RENAME()) is also of type lofs. 8117c478bd9Sstevel@tonic-gate */ 8127c478bd9Sstevel@tonic-gate if (vn_matchops(ndvp, lo_vnodeops)) { 8137c478bd9Sstevel@tonic-gate ndvp = realvp(ndvp); /* Check the next layer */ 8147c478bd9Sstevel@tonic-gate } else { 8157c478bd9Sstevel@tonic-gate /* 8167c478bd9Sstevel@tonic-gate * We can go fast here 8177c478bd9Sstevel@tonic-gate */ 8187c478bd9Sstevel@tonic-gate while (vn_matchops(odvp, lo_vnodeops)) { 8197c478bd9Sstevel@tonic-gate odvp = realvp(odvp); 8207c478bd9Sstevel@tonic-gate } 8217c478bd9Sstevel@tonic-gate if (odvp->v_vfsp != ndvp->v_vfsp) 8227c478bd9Sstevel@tonic-gate return (EXDEV); 8237c478bd9Sstevel@tonic-gate } 8247c478bd9Sstevel@tonic-gate return (VOP_RENAME(odvp, onm, ndvp, nnm, cr)); 8257c478bd9Sstevel@tonic-gate } 8267c478bd9Sstevel@tonic-gate 8277c478bd9Sstevel@tonic-gate static int 8287c478bd9Sstevel@tonic-gate lo_mkdir( 8297c478bd9Sstevel@tonic-gate vnode_t *dvp, 8307c478bd9Sstevel@tonic-gate char *nm, 8317c478bd9Sstevel@tonic-gate struct vattr *va, 8327c478bd9Sstevel@tonic-gate vnode_t **vpp, 8337c478bd9Sstevel@tonic-gate struct cred *cr) 8347c478bd9Sstevel@tonic-gate { 8357c478bd9Sstevel@tonic-gate int error; 8367c478bd9Sstevel@tonic-gate 8377c478bd9Sstevel@tonic-gate #ifdef LODEBUG 8387c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_mkdir vp %p realvp %p\n", dvp, realvp(dvp)); 8397c478bd9Sstevel@tonic-gate #endif 8407c478bd9Sstevel@tonic-gate error = VOP_MKDIR(realvp(dvp), nm, va, vpp, cr); 8417c478bd9Sstevel@tonic-gate if (!error) 842b431137cSowenr *vpp = makelonode(*vpp, vtoli(dvp->v_vfsp), 0); 8437c478bd9Sstevel@tonic-gate return (error); 8447c478bd9Sstevel@tonic-gate } 8457c478bd9Sstevel@tonic-gate 8467c478bd9Sstevel@tonic-gate static int 8477c478bd9Sstevel@tonic-gate lo_realvp(vnode_t *vp, vnode_t **vpp) 8487c478bd9Sstevel@tonic-gate { 8497c478bd9Sstevel@tonic-gate #ifdef LODEBUG 8507c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_realvp %p\n", vp); 8517c478bd9Sstevel@tonic-gate #endif 8527c478bd9Sstevel@tonic-gate while (vn_matchops(vp, lo_vnodeops)) 8537c478bd9Sstevel@tonic-gate vp = realvp(vp); 8547c478bd9Sstevel@tonic-gate 8557c478bd9Sstevel@tonic-gate if (VOP_REALVP(vp, vpp) != 0) 8567c478bd9Sstevel@tonic-gate *vpp = vp; 8577c478bd9Sstevel@tonic-gate return (0); 8587c478bd9Sstevel@tonic-gate } 8597c478bd9Sstevel@tonic-gate 8607c478bd9Sstevel@tonic-gate static int 8617c478bd9Sstevel@tonic-gate lo_rmdir( 8627c478bd9Sstevel@tonic-gate vnode_t *dvp, 8637c478bd9Sstevel@tonic-gate char *nm, 8647c478bd9Sstevel@tonic-gate vnode_t *cdir, 8657c478bd9Sstevel@tonic-gate struct cred *cr) 8667c478bd9Sstevel@tonic-gate { 8677c478bd9Sstevel@tonic-gate vnode_t *rvp = cdir; 8687c478bd9Sstevel@tonic-gate 8697c478bd9Sstevel@tonic-gate #ifdef LODEBUG 8707c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_rmdir vp %p realvp %p\n", dvp, realvp(dvp)); 8717c478bd9Sstevel@tonic-gate #endif 8727c478bd9Sstevel@tonic-gate /* if cdir is lofs vnode ptr get its real vnode ptr */ 8737c478bd9Sstevel@tonic-gate if (vn_matchops(dvp, vn_getops(rvp))) 8747c478bd9Sstevel@tonic-gate (void) lo_realvp(cdir, &rvp); 8757c478bd9Sstevel@tonic-gate dvp = realvp(dvp); 8767c478bd9Sstevel@tonic-gate return (VOP_RMDIR(dvp, nm, rvp, cr)); 8777c478bd9Sstevel@tonic-gate } 8787c478bd9Sstevel@tonic-gate 8797c478bd9Sstevel@tonic-gate static int 8807c478bd9Sstevel@tonic-gate lo_symlink( 8817c478bd9Sstevel@tonic-gate vnode_t *dvp, 8827c478bd9Sstevel@tonic-gate char *lnm, 8837c478bd9Sstevel@tonic-gate struct vattr *tva, 8847c478bd9Sstevel@tonic-gate char *tnm, 8857c478bd9Sstevel@tonic-gate struct cred *cr) 8867c478bd9Sstevel@tonic-gate { 8877c478bd9Sstevel@tonic-gate #ifdef LODEBUG 8887c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_symlink vp %p realvp %p\n", dvp, realvp(dvp)); 8897c478bd9Sstevel@tonic-gate #endif 8907c478bd9Sstevel@tonic-gate dvp = realvp(dvp); 8917c478bd9Sstevel@tonic-gate return (VOP_SYMLINK(dvp, lnm, tva, tnm, cr)); 8927c478bd9Sstevel@tonic-gate } 8937c478bd9Sstevel@tonic-gate 8947c478bd9Sstevel@tonic-gate static int 8957c478bd9Sstevel@tonic-gate lo_readlink(vnode_t *vp, struct uio *uiop, struct cred *cr) 8967c478bd9Sstevel@tonic-gate { 8977c478bd9Sstevel@tonic-gate vp = realvp(vp); 8987c478bd9Sstevel@tonic-gate return (VOP_READLINK(vp, uiop, cr)); 8997c478bd9Sstevel@tonic-gate } 9007c478bd9Sstevel@tonic-gate 9017c478bd9Sstevel@tonic-gate static int 9027c478bd9Sstevel@tonic-gate lo_readdir(vnode_t *vp, struct uio *uiop, struct cred *cr, int *eofp) 9037c478bd9Sstevel@tonic-gate { 9047c478bd9Sstevel@tonic-gate #ifdef LODEBUG 9057c478bd9Sstevel@tonic-gate lo_dprint(4, "lo_readdir vp %p realvp %p\n", vp, realvp(vp)); 9067c478bd9Sstevel@tonic-gate #endif 9077c478bd9Sstevel@tonic-gate vp = realvp(vp); 9087c478bd9Sstevel@tonic-gate return (VOP_READDIR(vp, uiop, cr, eofp)); 9097c478bd9Sstevel@tonic-gate } 9107c478bd9Sstevel@tonic-gate 9117c478bd9Sstevel@tonic-gate static int 9127c478bd9Sstevel@tonic-gate lo_rwlock(vnode_t *vp, int write_lock, caller_context_t *ct) 9137c478bd9Sstevel@tonic-gate { 9147c478bd9Sstevel@tonic-gate vp = realvp(vp); 9157c478bd9Sstevel@tonic-gate return (VOP_RWLOCK(vp, write_lock, ct)); 9167c478bd9Sstevel@tonic-gate } 9177c478bd9Sstevel@tonic-gate 9187c478bd9Sstevel@tonic-gate static void 9197c478bd9Sstevel@tonic-gate lo_rwunlock(vnode_t *vp, int write_lock, caller_context_t *ct) 9207c478bd9Sstevel@tonic-gate { 9217c478bd9Sstevel@tonic-gate vp = realvp(vp); 9227c478bd9Sstevel@tonic-gate VOP_RWUNLOCK(vp, write_lock, ct); 9237c478bd9Sstevel@tonic-gate } 9247c478bd9Sstevel@tonic-gate 9257c478bd9Sstevel@tonic-gate static int 9267c478bd9Sstevel@tonic-gate lo_seek(vnode_t *vp, offset_t ooff, offset_t *noffp) 9277c478bd9Sstevel@tonic-gate { 9287c478bd9Sstevel@tonic-gate vp = realvp(vp); 9297c478bd9Sstevel@tonic-gate return (VOP_SEEK(vp, ooff, noffp)); 9307c478bd9Sstevel@tonic-gate } 9317c478bd9Sstevel@tonic-gate 9327c478bd9Sstevel@tonic-gate static int 9337c478bd9Sstevel@tonic-gate lo_cmp(vnode_t *vp1, vnode_t *vp2) 9347c478bd9Sstevel@tonic-gate { 9357c478bd9Sstevel@tonic-gate while (vn_matchops(vp1, lo_vnodeops)) 9367c478bd9Sstevel@tonic-gate vp1 = realvp(vp1); 9377c478bd9Sstevel@tonic-gate while (vn_matchops(vp2, lo_vnodeops)) 9387c478bd9Sstevel@tonic-gate vp2 = realvp(vp2); 9397c478bd9Sstevel@tonic-gate return (VOP_CMP(vp1, vp2)); 9407c478bd9Sstevel@tonic-gate } 9417c478bd9Sstevel@tonic-gate 9427c478bd9Sstevel@tonic-gate static int 9437c478bd9Sstevel@tonic-gate lo_frlock( 9447c478bd9Sstevel@tonic-gate vnode_t *vp, 9457c478bd9Sstevel@tonic-gate int cmd, 9467c478bd9Sstevel@tonic-gate struct flock64 *bfp, 9477c478bd9Sstevel@tonic-gate int flag, 9487c478bd9Sstevel@tonic-gate offset_t offset, 9497c478bd9Sstevel@tonic-gate struct flk_callback *flk_cbp, 9507c478bd9Sstevel@tonic-gate cred_t *cr) 9517c478bd9Sstevel@tonic-gate { 9527c478bd9Sstevel@tonic-gate vp = realvp(vp); 9537c478bd9Sstevel@tonic-gate return (VOP_FRLOCK(vp, cmd, bfp, flag, offset, flk_cbp, cr)); 9547c478bd9Sstevel@tonic-gate } 9557c478bd9Sstevel@tonic-gate 9567c478bd9Sstevel@tonic-gate static int 9577c478bd9Sstevel@tonic-gate lo_space( 9587c478bd9Sstevel@tonic-gate vnode_t *vp, 9597c478bd9Sstevel@tonic-gate int cmd, 9607c478bd9Sstevel@tonic-gate struct flock64 *bfp, 9617c478bd9Sstevel@tonic-gate int flag, 9627c478bd9Sstevel@tonic-gate offset_t offset, 9637c478bd9Sstevel@tonic-gate struct cred *cr, 9647c478bd9Sstevel@tonic-gate caller_context_t *ct) 9657c478bd9Sstevel@tonic-gate { 9667c478bd9Sstevel@tonic-gate vp = realvp(vp); 9677c478bd9Sstevel@tonic-gate return (VOP_SPACE(vp, cmd, bfp, flag, offset, cr, ct)); 9687c478bd9Sstevel@tonic-gate } 9697c478bd9Sstevel@tonic-gate 9707c478bd9Sstevel@tonic-gate static int 9717c478bd9Sstevel@tonic-gate lo_getpage( 9727c478bd9Sstevel@tonic-gate vnode_t *vp, 9737c478bd9Sstevel@tonic-gate offset_t off, 9747c478bd9Sstevel@tonic-gate size_t len, 9757c478bd9Sstevel@tonic-gate uint_t *prot, 9767c478bd9Sstevel@tonic-gate struct page *parr[], 9777c478bd9Sstevel@tonic-gate size_t psz, 9787c478bd9Sstevel@tonic-gate struct seg *seg, 9797c478bd9Sstevel@tonic-gate caddr_t addr, 9807c478bd9Sstevel@tonic-gate enum seg_rw rw, 9817c478bd9Sstevel@tonic-gate struct cred *cr) 9827c478bd9Sstevel@tonic-gate { 9837c478bd9Sstevel@tonic-gate vp = realvp(vp); 9847c478bd9Sstevel@tonic-gate return (VOP_GETPAGE(vp, off, len, prot, parr, psz, seg, addr, rw, cr)); 9857c478bd9Sstevel@tonic-gate } 9867c478bd9Sstevel@tonic-gate 9877c478bd9Sstevel@tonic-gate static int 9887c478bd9Sstevel@tonic-gate lo_putpage(vnode_t *vp, offset_t off, size_t len, int flags, struct cred *cr) 9897c478bd9Sstevel@tonic-gate { 9907c478bd9Sstevel@tonic-gate vp = realvp(vp); 9917c478bd9Sstevel@tonic-gate return (VOP_PUTPAGE(vp, off, len, flags, cr)); 9927c478bd9Sstevel@tonic-gate } 9937c478bd9Sstevel@tonic-gate 9947c478bd9Sstevel@tonic-gate static int 9957c478bd9Sstevel@tonic-gate lo_map( 9967c478bd9Sstevel@tonic-gate vnode_t *vp, 9977c478bd9Sstevel@tonic-gate offset_t off, 9987c478bd9Sstevel@tonic-gate struct as *as, 9997c478bd9Sstevel@tonic-gate caddr_t *addrp, 10007c478bd9Sstevel@tonic-gate size_t len, 10017c478bd9Sstevel@tonic-gate uchar_t prot, 10027c478bd9Sstevel@tonic-gate uchar_t maxprot, 10037c478bd9Sstevel@tonic-gate uint_t flags, 10047c478bd9Sstevel@tonic-gate struct cred *cr) 10057c478bd9Sstevel@tonic-gate { 10067c478bd9Sstevel@tonic-gate vp = realvp(vp); 10077c478bd9Sstevel@tonic-gate return (VOP_MAP(vp, off, as, addrp, len, prot, maxprot, flags, cr)); 10087c478bd9Sstevel@tonic-gate } 10097c478bd9Sstevel@tonic-gate 10107c478bd9Sstevel@tonic-gate static int 10117c478bd9Sstevel@tonic-gate lo_addmap( 10127c478bd9Sstevel@tonic-gate vnode_t *vp, 10137c478bd9Sstevel@tonic-gate offset_t off, 10147c478bd9Sstevel@tonic-gate struct as *as, 10157c478bd9Sstevel@tonic-gate caddr_t addr, 10167c478bd9Sstevel@tonic-gate size_t len, 10177c478bd9Sstevel@tonic-gate uchar_t prot, 10187c478bd9Sstevel@tonic-gate uchar_t maxprot, 10197c478bd9Sstevel@tonic-gate uint_t flags, 10207c478bd9Sstevel@tonic-gate struct cred *cr) 10217c478bd9Sstevel@tonic-gate { 10227c478bd9Sstevel@tonic-gate vp = realvp(vp); 10237c478bd9Sstevel@tonic-gate return (VOP_ADDMAP(vp, off, as, addr, len, prot, maxprot, flags, cr)); 10247c478bd9Sstevel@tonic-gate } 10257c478bd9Sstevel@tonic-gate 10267c478bd9Sstevel@tonic-gate static int 10277c478bd9Sstevel@tonic-gate lo_delmap( 10287c478bd9Sstevel@tonic-gate vnode_t *vp, 10297c478bd9Sstevel@tonic-gate offset_t off, 10307c478bd9Sstevel@tonic-gate struct as *as, 10317c478bd9Sstevel@tonic-gate caddr_t addr, 10327c478bd9Sstevel@tonic-gate size_t len, 10337c478bd9Sstevel@tonic-gate uint_t prot, 10347c478bd9Sstevel@tonic-gate uint_t maxprot, 10357c478bd9Sstevel@tonic-gate uint_t flags, 10367c478bd9Sstevel@tonic-gate struct cred *cr) 10377c478bd9Sstevel@tonic-gate { 10387c478bd9Sstevel@tonic-gate vp = realvp(vp); 10397c478bd9Sstevel@tonic-gate return (VOP_DELMAP(vp, off, as, addr, len, prot, maxprot, flags, cr)); 10407c478bd9Sstevel@tonic-gate } 10417c478bd9Sstevel@tonic-gate 10427c478bd9Sstevel@tonic-gate static int 10437c478bd9Sstevel@tonic-gate lo_poll( 10447c478bd9Sstevel@tonic-gate vnode_t *vp, 10457c478bd9Sstevel@tonic-gate short events, 10467c478bd9Sstevel@tonic-gate int anyyet, 10477c478bd9Sstevel@tonic-gate short *reventsp, 10487c478bd9Sstevel@tonic-gate struct pollhead **phpp) 10497c478bd9Sstevel@tonic-gate { 10507c478bd9Sstevel@tonic-gate vp = realvp(vp); 10517c478bd9Sstevel@tonic-gate return (VOP_POLL(vp, events, anyyet, reventsp, phpp)); 10527c478bd9Sstevel@tonic-gate } 10537c478bd9Sstevel@tonic-gate 10547c478bd9Sstevel@tonic-gate static int 10557c478bd9Sstevel@tonic-gate lo_dump(vnode_t *vp, caddr_t addr, int bn, int count) 10567c478bd9Sstevel@tonic-gate { 10577c478bd9Sstevel@tonic-gate vp = realvp(vp); 10587c478bd9Sstevel@tonic-gate return (VOP_DUMP(vp, addr, bn, count)); 10597c478bd9Sstevel@tonic-gate } 10607c478bd9Sstevel@tonic-gate 10617c478bd9Sstevel@tonic-gate static int 10627c478bd9Sstevel@tonic-gate lo_pathconf(vnode_t *vp, int cmd, ulong_t *valp, struct cred *cr) 10637c478bd9Sstevel@tonic-gate { 10647c478bd9Sstevel@tonic-gate vp = realvp(vp); 10657c478bd9Sstevel@tonic-gate return (VOP_PATHCONF(vp, cmd, valp, cr)); 10667c478bd9Sstevel@tonic-gate } 10677c478bd9Sstevel@tonic-gate 10687c478bd9Sstevel@tonic-gate static int 10697c478bd9Sstevel@tonic-gate lo_pageio( 10707c478bd9Sstevel@tonic-gate vnode_t *vp, 10717c478bd9Sstevel@tonic-gate struct page *pp, 10727c478bd9Sstevel@tonic-gate u_offset_t io_off, 10737c478bd9Sstevel@tonic-gate size_t io_len, 10747c478bd9Sstevel@tonic-gate int flags, 10757c478bd9Sstevel@tonic-gate cred_t *cr) 10767c478bd9Sstevel@tonic-gate { 10777c478bd9Sstevel@tonic-gate vp = realvp(vp); 10787c478bd9Sstevel@tonic-gate return (VOP_PAGEIO(vp, pp, io_off, io_len, flags, cr)); 10797c478bd9Sstevel@tonic-gate } 10807c478bd9Sstevel@tonic-gate 10817c478bd9Sstevel@tonic-gate static void 10827c478bd9Sstevel@tonic-gate lo_dispose(vnode_t *vp, page_t *pp, int fl, int dn, cred_t *cr) 10837c478bd9Sstevel@tonic-gate { 10847c478bd9Sstevel@tonic-gate vp = realvp(vp); 1085ad23a2dbSjohansen if (vp != NULL && !VN_ISKAS(vp)) 10867c478bd9Sstevel@tonic-gate VOP_DISPOSE(vp, pp, fl, dn, cr); 10877c478bd9Sstevel@tonic-gate } 10887c478bd9Sstevel@tonic-gate 10897c478bd9Sstevel@tonic-gate static int 10907c478bd9Sstevel@tonic-gate lo_setsecattr(vnode_t *vp, vsecattr_t *secattr, int flags, struct cred *cr) 10917c478bd9Sstevel@tonic-gate { 10927c478bd9Sstevel@tonic-gate if (vn_is_readonly(vp)) 10937c478bd9Sstevel@tonic-gate return (EROFS); 10947c478bd9Sstevel@tonic-gate vp = realvp(vp); 10957c478bd9Sstevel@tonic-gate return (VOP_SETSECATTR(vp, secattr, flags, cr)); 10967c478bd9Sstevel@tonic-gate } 10977c478bd9Sstevel@tonic-gate 10987c478bd9Sstevel@tonic-gate static int 10997c478bd9Sstevel@tonic-gate lo_getsecattr(vnode_t *vp, vsecattr_t *secattr, int flags, struct cred *cr) 11007c478bd9Sstevel@tonic-gate { 11017c478bd9Sstevel@tonic-gate vp = realvp(vp); 11027c478bd9Sstevel@tonic-gate return (VOP_GETSECATTR(vp, secattr, flags, cr)); 11037c478bd9Sstevel@tonic-gate } 11047c478bd9Sstevel@tonic-gate 11057c478bd9Sstevel@tonic-gate static int 11067c478bd9Sstevel@tonic-gate lo_shrlock(vnode_t *vp, int cmd, struct shrlock *shr, int flag, cred_t *cr) 11077c478bd9Sstevel@tonic-gate { 11087c478bd9Sstevel@tonic-gate vp = realvp(vp); 11097c478bd9Sstevel@tonic-gate return (VOP_SHRLOCK(vp, cmd, shr, flag, cr)); 11107c478bd9Sstevel@tonic-gate } 11117c478bd9Sstevel@tonic-gate 11127c478bd9Sstevel@tonic-gate /* 11137c478bd9Sstevel@tonic-gate * Loopback vnode operations vector. 11147c478bd9Sstevel@tonic-gate */ 11157c478bd9Sstevel@tonic-gate 11167c478bd9Sstevel@tonic-gate struct vnodeops *lo_vnodeops; 11177c478bd9Sstevel@tonic-gate 11187c478bd9Sstevel@tonic-gate const fs_operation_def_t lo_vnodeops_template[] = { 11197c478bd9Sstevel@tonic-gate VOPNAME_OPEN, lo_open, 11207c478bd9Sstevel@tonic-gate VOPNAME_CLOSE, lo_close, 11217c478bd9Sstevel@tonic-gate VOPNAME_READ, lo_read, 11227c478bd9Sstevel@tonic-gate VOPNAME_WRITE, lo_write, 11237c478bd9Sstevel@tonic-gate VOPNAME_IOCTL, lo_ioctl, 11247c478bd9Sstevel@tonic-gate VOPNAME_SETFL, lo_setfl, 11257c478bd9Sstevel@tonic-gate VOPNAME_GETATTR, lo_getattr, 11267c478bd9Sstevel@tonic-gate VOPNAME_SETATTR, lo_setattr, 11277c478bd9Sstevel@tonic-gate VOPNAME_ACCESS, lo_access, 11287c478bd9Sstevel@tonic-gate VOPNAME_LOOKUP, lo_lookup, 11297c478bd9Sstevel@tonic-gate VOPNAME_CREATE, lo_create, 11307c478bd9Sstevel@tonic-gate VOPNAME_REMOVE, lo_remove, 11317c478bd9Sstevel@tonic-gate VOPNAME_LINK, lo_link, 11327c478bd9Sstevel@tonic-gate VOPNAME_RENAME, lo_rename, 11337c478bd9Sstevel@tonic-gate VOPNAME_MKDIR, lo_mkdir, 11347c478bd9Sstevel@tonic-gate VOPNAME_RMDIR, lo_rmdir, 11357c478bd9Sstevel@tonic-gate VOPNAME_READDIR, lo_readdir, 11367c478bd9Sstevel@tonic-gate VOPNAME_SYMLINK, lo_symlink, 11377c478bd9Sstevel@tonic-gate VOPNAME_READLINK, lo_readlink, 11387c478bd9Sstevel@tonic-gate VOPNAME_FSYNC, lo_fsync, 11397c478bd9Sstevel@tonic-gate VOPNAME_INACTIVE, (fs_generic_func_p) lo_inactive, 11407c478bd9Sstevel@tonic-gate VOPNAME_FID, lo_fid, 11417c478bd9Sstevel@tonic-gate VOPNAME_RWLOCK, lo_rwlock, 11427c478bd9Sstevel@tonic-gate VOPNAME_RWUNLOCK, (fs_generic_func_p) lo_rwunlock, 11437c478bd9Sstevel@tonic-gate VOPNAME_SEEK, lo_seek, 11447c478bd9Sstevel@tonic-gate VOPNAME_CMP, lo_cmp, 11457c478bd9Sstevel@tonic-gate VOPNAME_FRLOCK, lo_frlock, 11467c478bd9Sstevel@tonic-gate VOPNAME_SPACE, lo_space, 11477c478bd9Sstevel@tonic-gate VOPNAME_REALVP, lo_realvp, 11487c478bd9Sstevel@tonic-gate VOPNAME_GETPAGE, lo_getpage, 11497c478bd9Sstevel@tonic-gate VOPNAME_PUTPAGE, lo_putpage, 11507c478bd9Sstevel@tonic-gate VOPNAME_MAP, (fs_generic_func_p) lo_map, 11517c478bd9Sstevel@tonic-gate VOPNAME_ADDMAP, (fs_generic_func_p) lo_addmap, 11527c478bd9Sstevel@tonic-gate VOPNAME_DELMAP, lo_delmap, 11537c478bd9Sstevel@tonic-gate VOPNAME_POLL, (fs_generic_func_p) lo_poll, 11547c478bd9Sstevel@tonic-gate VOPNAME_DUMP, lo_dump, 11557c478bd9Sstevel@tonic-gate VOPNAME_DUMPCTL, fs_error, /* XXX - why? */ 11567c478bd9Sstevel@tonic-gate VOPNAME_PATHCONF, lo_pathconf, 11577c478bd9Sstevel@tonic-gate VOPNAME_PAGEIO, lo_pageio, 11587c478bd9Sstevel@tonic-gate VOPNAME_DISPOSE, (fs_generic_func_p) lo_dispose, 11597c478bd9Sstevel@tonic-gate VOPNAME_SETSECATTR, lo_setsecattr, 11607c478bd9Sstevel@tonic-gate VOPNAME_GETSECATTR, lo_getsecattr, 11617c478bd9Sstevel@tonic-gate VOPNAME_SHRLOCK, lo_shrlock, 11627c478bd9Sstevel@tonic-gate NULL, NULL 11637c478bd9Sstevel@tonic-gate }; 1164