File:  [DragonFly] / src / sys / vfs / gnu / ext2fs / ext2_vnops.c
Revision 1.10: download - view: text, annotated - select for diffs
Mon Mar 1 06:33:20 2004 UTC (10 years, 1 month ago) by dillon
Branches: MAIN
CVS tags: HEAD
Newtoken commit.  Change the token implementation as follows:  (1) Obtaining
a token no longer enters a critical section.  (2) tokens can be held through
schedular switches and blocking conditions and are effectively released and
reacquired on resume.  Thus tokens serialize access only while the thread
is actually running.  Serialization is not broken by preemptive interrupts.
That is, interrupt threads which preempt do no release the preempted thread's
tokens.  (3) Unlike spl's, tokens will interlock w/ interrupt threads on
the same or on a different cpu.

The vnode interlock code has been rewritten and the API has changed.  The
mountlist vnode scanning code has been consolidated and all known races have
been fixed.  The vnode interlock is now a pool token.

The code that frees unreferenced vnodes whos last VM page has been freed has
been moved out of the low level vm_page_free() code and moved to the
periodic filesystem sycer code in vfs_msycn().

The SMP startup code and the IPI code has been cleaned up considerably.
Certain early token interactions on AP cpus have been moved to the BSP.

The LWKT rwlock API has been cleaned up and turned on.

Major testing by: David Rhodus

    1: /*
    2:  *  modified for EXT2FS support in Lites 1.1
    3:  *
    4:  *  Aug 1995, Godmar Back (gback@cs.utah.edu)
    5:  *  University of Utah, Department of Computer Science
    6:  */
    7: /*
    8:  * Copyright (c) 1982, 1986, 1989, 1993
    9:  *	The Regents of the University of California.  All rights reserved.
   10:  * (c) UNIX System Laboratories, Inc.
   11:  * All or some portions of this file are derived from material licensed
   12:  * to the University of California by American Telephone and Telegraph
   13:  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   14:  * the permission of UNIX System Laboratories, Inc.
   15:  *
   16:  * Redistribution and use in source and binary forms, with or without
   17:  * modification, are permitted provided that the following conditions
   18:  * are met:
   19:  * 1. Redistributions of source code must retain the above copyright
   20:  *    notice, this list of conditions and the following disclaimer.
   21:  * 2. Redistributions in binary form must reproduce the above copyright
   22:  *    notice, this list of conditions and the following disclaimer in the
   23:  *    documentation and/or other materials provided with the distribution.
   24:  * 3. All advertising materials mentioning features or use of this software
   25:  *    must display the following acknowledgement:
   26:  *	This product includes software developed by the University of
   27:  *	California, Berkeley and its contributors.
   28:  * 4. Neither the name of the University nor the names of its contributors
   29:  *    may be used to endorse or promote products derived from this software
   30:  *    without specific prior written permission.
   31:  *
   32:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   33:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   34:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   35:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   36:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   37:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   38:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   39:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   40:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   41:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   42:  * SUCH DAMAGE.
   43:  *
   44:  *	@(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
   45:  *	@(#)ext2_vnops.c	8.7 (Berkeley) 2/3/94
   46:  * $FreeBSD: src/sys/gnu/ext2fs/ext2_vnops.c,v 1.51.2.2 2003/01/02 17:26:18 bde Exp $
   47:  * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2_vnops.c,v 1.10 2004/03/01 06:33:20 dillon Exp $
   48:  */
   49: 
   50: #include "opt_quota.h"
   51: #include "opt_suiddir.h"
   52: 
   53: #include <sys/param.h>
   54: #include <sys/systm.h>
   55: #include <sys/resourcevar.h>
   56: #include <sys/kernel.h>
   57: #include <sys/stat.h>
   58: #include <sys/buf.h>
   59: #include <sys/proc.h>
   60: #include <sys/mount.h>
   61: #include <sys/time.h>
   62: #include <sys/vnode.h>
   63: #include <sys/namei.h>
   64: 
   65: #include <vm/vm.h>
   66: #include <vm/vm_extern.h>
   67: #include <vm/vm_zone.h>
   68: #include <vm/vnode_pager.h>
   69: #include <sys/buf2.h>
   70: 
   71: #include <sys/signalvar.h>
   72: #include <vfs/ufs/dir.h>
   73: #include <vfs/ufs/quota.h>
   74: #include <vfs/ufs/inode.h>
   75: #include <vfs/ufs/ufsmount.h>
   76: #include <vfs/ufs/ufs_extern.h>
   77: 
   78: #include "ext2_fs_sb.h"
   79: #include "fs.h"
   80: #include "ext2_extern.h"
   81: #include "ext2_fs.h"
   82: 
   83: static int ext2_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *);
   84: 
   85: static int ext2_fsync (struct vop_fsync_args *);
   86: static int ext2_read (struct vop_read_args *);
   87: static int ext2_write (struct vop_write_args *);
   88: static int ext2_remove (struct vop_remove_args *);
   89: static int ext2_link (struct vop_link_args *);
   90: static int ext2_rename (struct vop_rename_args *);
   91: static int ext2_mkdir (struct vop_mkdir_args *);
   92: static int ext2_rmdir (struct vop_rmdir_args *);
   93: static int ext2_create (struct vop_create_args *);
   94: static int ext2_mknod (struct vop_mknod_args *);
   95: static int ext2_symlink (struct vop_symlink_args *);
   96: static int ext2_getpages (struct vop_getpages_args *);
   97: static int ext2_putpages (struct vop_putpages_args *);
   98: 
   99: /* Global vfs data structures for ufs. */
  100: vop_t **ext2_vnodeop_p;
  101: static struct vnodeopv_entry_desc ext2_vnodeop_entries[] = {
  102: 	{ &vop_default_desc,		(vop_t *) ufs_vnoperate },
  103: 	{ &vop_cachedlookup_desc,	(vop_t *) ext2_lookup },
  104: 	{ &vop_fsync_desc,		(vop_t *) ext2_fsync },
  105: 	{ &vop_inactive_desc,		(vop_t *) ext2_inactive },
  106: 	{ &vop_lookup_desc,		(vop_t *) vfs_cache_lookup },
  107: 	{ &vop_read_desc,		(vop_t *) ext2_read },
  108: 	{ &vop_readdir_desc,		(vop_t *) ext2_readdir },
  109: 	{ &vop_reallocblks_desc,	(vop_t *) ext2_reallocblks },
  110: 	{ &vop_write_desc,		(vop_t *) ext2_write },
  111: 	{ &vop_remove_desc,		(vop_t *) ext2_remove },
  112: 	{ &vop_link_desc,		(vop_t *) ext2_link },
  113: 	{ &vop_rename_desc,		(vop_t *) ext2_rename },
  114: 	{ &vop_mkdir_desc,		(vop_t *) ext2_mkdir },
  115: 	{ &vop_rmdir_desc,		(vop_t *) ext2_rmdir },
  116: 	{ &vop_create_desc,		(vop_t *) ext2_create },
  117: 	{ &vop_mknod_desc,		(vop_t *) ext2_mknod },
  118: 	{ &vop_symlink_desc,		(vop_t *) ext2_symlink },
  119: 	{ &vop_getpages_desc,		(vop_t *) ext2_getpages },
  120: 	{ &vop_putpages_desc,		(vop_t *) ext2_putpages },
  121: 	{ NULL, NULL }
  122: };
  123: static struct vnodeopv_desc ext2fs_vnodeop_opv_desc =
  124: 	{ &ext2_vnodeop_p, ext2_vnodeop_entries };
  125: 
  126: vop_t **ext2_specop_p;
  127: static struct vnodeopv_entry_desc ext2_specop_entries[] = {
  128: 	{ &vop_default_desc,		(vop_t *) ufs_vnoperatespec },
  129: 	{ &vop_fsync_desc,		(vop_t *) ext2_fsync },
  130: 	{ &vop_inactive_desc,		(vop_t *) ext2_inactive },
  131: 	{ NULL, NULL }
  132: };
  133: static struct vnodeopv_desc ext2fs_specop_opv_desc =
  134: 	{ &ext2_specop_p, ext2_specop_entries };
  135: 
  136: vop_t **ext2_fifoop_p;
  137: static struct vnodeopv_entry_desc ext2_fifoop_entries[] = {
  138: 	{ &vop_default_desc,		(vop_t *) ufs_vnoperatefifo },
  139: 	{ &vop_fsync_desc,		(vop_t *) ext2_fsync },
  140: 	{ &vop_inactive_desc,		(vop_t *) ext2_inactive },
  141: 	{ NULL, NULL }
  142: };
  143: static struct vnodeopv_desc ext2fs_fifoop_opv_desc =
  144: 	{ &ext2_fifoop_p, ext2_fifoop_entries };
  145: 
  146: 	VNODEOP_SET(ext2fs_vnodeop_opv_desc);
  147: 	VNODEOP_SET(ext2fs_specop_opv_desc);
  148: 	VNODEOP_SET(ext2fs_fifoop_opv_desc);
  149: 
  150: #include "ext2_readwrite.c"
  151: 
  152: /*
  153:  * A virgin directory (no blushing please).
  154:  * Note that the type and namlen fields are reversed relative to ufs.
  155:  * Also, we don't use `struct odirtemplate', since it would just cause
  156:  * endianness problems.
  157:  */
  158: static struct dirtemplate mastertemplate = {
  159: 	0, 12, 1, EXT2_FT_DIR, ".",
  160: 	0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
  161: };
  162: static struct dirtemplate omastertemplate = {
  163: 	0, 12, 1, EXT2_FT_UNKNOWN, ".",
  164: 	0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".."
  165: };
  166: 
  167: /*
  168:  * Create a regular file
  169:  */
  170: static int
  171: ext2_create(ap)
  172: 	struct vop_create_args /* {
  173: 		struct vnode *a_dvp;
  174: 		struct vnode **a_vpp;
  175: 		struct componentname *a_cnp;
  176: 		struct vattr *a_vap;
  177: 	} */ *ap;
  178: {
  179: 	int error;
  180: 
  181: 	error =
  182: 	    ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
  183: 	    ap->a_dvp, ap->a_vpp, ap->a_cnp);
  184: 	if (error)
  185: 		return (error);
  186: 	return (0);
  187: }
  188: 
  189: /*
  190:  * Synch an open file.
  191:  */
  192: /* ARGSUSED */
  193: static int
  194: ext2_fsync(ap)
  195: 	struct vop_fsync_args /* {
  196: 		struct vnode *a_vp;
  197: 		struct ucred *a_cred;
  198: 		int a_waitfor;
  199: 		struct proc *a_p;
  200: 	} */ *ap;
  201: {
  202: 	struct vnode *vp = ap->a_vp;
  203: 	struct buf *bp;
  204: 	struct buf *nbp;
  205: 	int s;
  206: 
  207: 	/* 
  208: 	 * XXX why is all this fs specific?
  209: 	 */
  210: 
  211: 	/*
  212: 	 * Flush all dirty buffers associated with a vnode.
  213: 	 */
  214: 	ext2_discard_prealloc(VTOI(vp));
  215: 
  216: loop:
  217: 	s = splbio();
  218: 	for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
  219: 		nbp = TAILQ_NEXT(bp, b_vnbufs);
  220: 		if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
  221: 			continue;
  222: 		if ((bp->b_flags & B_DELWRI) == 0)
  223: 			panic("ext2_fsync: not dirty");
  224: 		bremfree(bp);
  225: 		splx(s);
  226: 		/*
  227: 		 * Wait for I/O associated with indirect blocks to complete,
  228: 		 * since there is no way to quickly wait for them below.
  229: 		 */
  230: 		if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT)
  231: 			(void) bawrite(bp);
  232: 		else
  233: 			(void) bwrite(bp);
  234: 		goto loop;
  235: 	}
  236: 	if (ap->a_waitfor == MNT_WAIT) {
  237: 		while (vp->v_numoutput) {
  238: 			vp->v_flag |= VBWAIT;
  239: 			tsleep(&vp->v_numoutput, 0, "e2fsyn", 0);
  240: 		}
  241: #if DIAGNOSTIC
  242: 		if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
  243: 			vprint("ext2_fsync: dirty", vp);
  244: 			goto loop;
  245: 		}
  246: #endif
  247: 	}
  248: 	splx(s);
  249: 	return (UFS_UPDATE(ap->a_vp, ap->a_waitfor == MNT_WAIT));
  250: }
  251: 
  252: /*
  253:  * Mknod vnode call
  254:  */
  255: /* ARGSUSED */
  256: static int
  257: ext2_mknod(ap)
  258: 	struct vop_mknod_args /* {
  259: 		struct vnode *a_dvp;
  260: 		struct vnode **a_vpp;
  261: 		struct componentname *a_cnp;
  262: 		struct vattr *a_vap;
  263: 	} */ *ap;
  264: {
  265: 	struct vattr *vap = ap->a_vap;
  266: 	struct vnode **vpp = ap->a_vpp;
  267: 	struct inode *ip;
  268: 	ino_t ino;
  269: 	int error;
  270: 
  271: 	error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
  272: 	    ap->a_dvp, vpp, ap->a_cnp);
  273: 	if (error)
  274: 		return (error);
  275: 	ip = VTOI(*vpp);
  276: 	ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
  277: 	if (vap->va_rdev != VNOVAL) {
  278: 		/*
  279: 		 * Want to be able to use this to make badblock
  280: 		 * inodes, so don't truncate the dev number.
  281: 		 */
  282: 		ip->i_rdev = vap->va_rdev;
  283: 	}
  284: 	/*
  285: 	 * Remove inode, then reload it through VFS_VGET so it is
  286: 	 * checked to see if it is an alias of an existing entry in
  287: 	 * the inode cache.
  288: 	 */
  289: 	vput(*vpp);
  290: 	(*vpp)->v_type = VNON;
  291: 	ino = ip->i_number;	/* Save this before vgone() invalidates ip. */
  292: 	vgone(*vpp);
  293: 	error = VFS_VGET(ap->a_dvp->v_mount, ino, vpp);
  294: 	if (error) {
  295: 		*vpp = NULL;
  296: 		return (error);
  297: 	}
  298: 	return (0);
  299: }
  300: 
  301: static int
  302: ext2_remove(ap)
  303: 	struct vop_remove_args /* {
  304: 		struct vnode *a_dvp;
  305: 		struct vnode *a_vp;
  306: 		struct componentname *a_cnp;
  307: 	} */ *ap;
  308: {
  309: 	struct inode *ip;
  310: 	struct vnode *vp = ap->a_vp;
  311: 	struct vnode *dvp = ap->a_dvp;
  312: 	int error;
  313: 
  314: 	ip = VTOI(vp);
  315: 	if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
  316: 	    (VTOI(dvp)->i_flags & APPEND)) {
  317: 		error = EPERM;
  318: 		goto out;
  319: 	}
  320: 	error = ext2_dirremove(dvp, ap->a_cnp);
  321: 	if (error == 0) {
  322: 		ip->i_nlink--;
  323: 		ip->i_flag |= IN_CHANGE;
  324: 	}
  325: out:
  326: 	return (error);
  327: }
  328: 
  329: /*
  330:  * link vnode call
  331:  */
  332: static int
  333: ext2_link(ap)
  334: 	struct vop_link_args /* {
  335: 		struct vnode *a_tdvp;
  336: 		struct vnode *a_vp;
  337: 		struct componentname *a_cnp;
  338: 	} */ *ap;
  339: {
  340: 	struct vnode *vp = ap->a_vp;
  341: 	struct vnode *tdvp = ap->a_tdvp;
  342: 	struct componentname *cnp = ap->a_cnp;
  343: 	struct thread *td = cnp->cn_td;
  344: 	struct inode *ip;
  345: 	int error;
  346: 
  347: #ifdef DIAGNOSTIC
  348: 	if ((cnp->cn_flags & CNP_HASBUF) == 0)
  349: 		panic("ufs_link: no name");
  350: #endif
  351: 	if (tdvp->v_mount != vp->v_mount) {
  352: 		error = EXDEV;
  353: 		goto out2;
  354: 	}
  355: 	if (tdvp != vp && (error = vn_lock(vp, NULL, LK_EXCLUSIVE, td))) {
  356: 		goto out2;
  357: 	}
  358: 	ip = VTOI(vp);
  359: 	if ((nlink_t)ip->i_nlink >= LINK_MAX) {
  360: 		error = EMLINK;
  361: 		goto out1;
  362: 	}
  363: 	if (ip->i_flags & (IMMUTABLE | APPEND)) {
  364: 		error = EPERM;
  365: 		goto out1;
  366: 	}
  367: 	ip->i_nlink++;
  368: 	ip->i_flag |= IN_CHANGE;
  369: 	error = UFS_UPDATE(vp, 1);
  370: 	if (!error)
  371: 		error = ext2_direnter(ip, tdvp, cnp);
  372: 	if (error) {
  373: 		ip->i_nlink--;
  374: 		ip->i_flag |= IN_CHANGE;
  375: 	}
  376: out1:
  377: 	if (tdvp != vp)
  378: 		VOP_UNLOCK(vp, NULL, 0, td);
  379: out2:
  380: 	return (error);
  381: }
  382: 
  383: /*
  384:  * Rename system call.
  385:  *   See comments in sys/ufs/ufs/ufs_vnops.c
  386:  */
  387: static int
  388: ext2_rename(ap)
  389: 	struct vop_rename_args  /* {
  390: 		struct vnode *a_fdvp;
  391: 		struct vnode *a_fvp;
  392: 		struct componentname *a_fcnp;
  393: 		struct vnode *a_tdvp;
  394: 		struct vnode *a_tvp;
  395: 		struct componentname *a_tcnp;
  396: 	} */ *ap;
  397: {
  398: 	struct vnode *tvp = ap->a_tvp;
  399: 	struct vnode *tdvp = ap->a_tdvp;
  400: 	struct vnode *fvp = ap->a_fvp;
  401: 	struct vnode *fdvp = ap->a_fdvp;
  402: 	struct componentname *tcnp = ap->a_tcnp;
  403: 	struct componentname *fcnp = ap->a_fcnp;
  404: 	struct thread *td = fcnp->cn_td;
  405: 	struct inode *ip, *xp, *dp;
  406: 	struct dirtemplate dirbuf;
  407: 	int doingdirectory = 0, oldparent = 0, newparent = 0;
  408: 	int error = 0;
  409: 	u_char namlen;
  410: 
  411: #ifdef DIAGNOSTIC
  412: 	if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
  413: 	    (fcnp->cn_flags & CNP_HASBUF) == 0)
  414: 		panic("ufs_rename: no name");
  415: #endif
  416: 	/*
  417: 	 * Check for cross-device rename.
  418: 	 */
  419: 	if ((fvp->v_mount != tdvp->v_mount) ||
  420: 	    (tvp && (fvp->v_mount != tvp->v_mount))) {
  421: 		error = EXDEV;
  422: abortit:
  423: 		if (tdvp == tvp)
  424: 			vrele(tdvp);
  425: 		else
  426: 			vput(tdvp);
  427: 		if (tvp)
  428: 			vput(tvp);
  429: 		vrele(fdvp);
  430: 		vrele(fvp);
  431: 		return (error);
  432: 	}
  433: 
  434: 	if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
  435: 	    (VTOI(tdvp)->i_flags & APPEND))) {
  436: 		error = EPERM;
  437: 		goto abortit;
  438: 	}
  439: 
  440: 	/*
  441: 	 * Renaming a file to itself has no effect.  The upper layers should
  442: 	 * not call us in that case.  Temporarily just warn if they do.
  443: 	 */
  444: 	if (fvp == tvp) {
  445: 		printf("ext2_rename: fvp == tvp (can't happen)\n");
  446: 		error = 0;
  447: 		goto abortit;
  448: 	}
  449: 
  450: 	if ((error = vn_lock(fvp, NULL, LK_EXCLUSIVE, td)) != 0)
  451: 		goto abortit;
  452: 	dp = VTOI(fdvp);
  453: 	ip = VTOI(fvp);
  454:  	if (ip->i_nlink >= LINK_MAX) {
  455:  		VOP_UNLOCK(fvp, NULL, 0, td);
  456:  		error = EMLINK;
  457:  		goto abortit;
  458:  	}
  459: 	if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
  460: 	    || (dp->i_flags & APPEND)) {
  461: 		VOP_UNLOCK(fvp, NULL, 0, td);
  462: 		error = EPERM;
  463: 		goto abortit;
  464: 	}
  465: 	if ((ip->i_mode & IFMT) == IFDIR) {
  466: 		/*
  467: 		 * Avoid ".", "..", and aliases of "." for obvious reasons.
  468: 		 */
  469: 		if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
  470: 		    dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT ||
  471: 		    (ip->i_flag & IN_RENAME)) {
  472: 			VOP_UNLOCK(fvp, NULL, 0, td);
  473: 			error = EINVAL;
  474: 			goto abortit;
  475: 		}
  476: 		ip->i_flag |= IN_RENAME;
  477: 		oldparent = dp->i_number;
  478: 		doingdirectory++;
  479: 	}
  480: 	vrele(fdvp);
  481: 
  482: 	/*
  483: 	 * When the target exists, both the directory
  484: 	 * and target vnodes are returned locked.
  485: 	 */
  486: 	dp = VTOI(tdvp);
  487: 	xp = NULL;
  488: 	if (tvp)
  489: 		xp = VTOI(tvp);
  490: 
  491: 	/*
  492: 	 * 1) Bump link count while we're moving stuff
  493: 	 *    around.  If we crash somewhere before
  494: 	 *    completing our work, the link count
  495: 	 *    may be wrong, but correctable.
  496: 	 */
  497: 	ip->i_nlink++;
  498: 	ip->i_flag |= IN_CHANGE;
  499: 	if ((error = UFS_UPDATE(fvp, 1)) != 0) {
  500: 		VOP_UNLOCK(fvp, NULL, 0, td);
  501: 		goto bad;
  502: 	}
  503: 
  504: 	/*
  505: 	 * If ".." must be changed (ie the directory gets a new
  506: 	 * parent) then the source directory must not be in the
  507: 	 * directory heirarchy above the target, as this would
  508: 	 * orphan everything below the source directory. Also
  509: 	 * the user must have write permission in the source so
  510: 	 * as to be able to change "..". We must repeat the call
  511: 	 * to namei, as the parent directory is unlocked by the
  512: 	 * call to checkpath().
  513: 	 */
  514: 	error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
  515: 	VOP_UNLOCK(fvp, NULL, 0, td);
  516: 	if (oldparent != dp->i_number)
  517: 		newparent = dp->i_number;
  518: 	if (doingdirectory && newparent) {
  519: 		if (error)	/* write access check above */
  520: 			goto bad;
  521: 		if (xp != NULL)
  522: 			vput(tvp);
  523: 		error = ext2_checkpath(ip, dp, tcnp->cn_cred);
  524: 		if (error)
  525: 			goto out;
  526: 		VREF(tdvp);
  527: 		error = relookup(tdvp, &tvp, tcnp);
  528: 		if (error)
  529: 			goto out;
  530: 		vrele(tdvp);
  531: 		dp = VTOI(tdvp);
  532: 		xp = NULL;
  533: 		if (tvp)
  534: 			xp = VTOI(tvp);
  535: 	}
  536: 	/*
  537: 	 * 2) If target doesn't exist, link the target
  538: 	 *    to the source and unlink the source.
  539: 	 *    Otherwise, rewrite the target directory
  540: 	 *    entry to reference the source inode and
  541: 	 *    expunge the original entry's existence.
  542: 	 */
  543: 	if (xp == NULL) {
  544: 		if (dp->i_dev != ip->i_dev)
  545: 			panic("ufs_rename: EXDEV");
  546: 		/*
  547: 		 * Account for ".." in new directory.
  548: 		 * When source and destination have the same
  549: 		 * parent we don't fool with the link count.
  550: 		 */
  551: 		if (doingdirectory && newparent) {
  552: 			if ((nlink_t)dp->i_nlink >= LINK_MAX) {
  553: 				error = EMLINK;
  554: 				goto bad;
  555: 			}
  556: 			dp->i_nlink++;
  557: 			dp->i_flag |= IN_CHANGE;
  558: 			error = UFS_UPDATE(tdvp, 1);
  559: 			if (error)
  560: 				goto bad;
  561: 		}
  562: 		error = ext2_direnter(ip, tdvp, tcnp);
  563: 		if (error) {
  564: 			if (doingdirectory && newparent) {
  565: 				dp->i_nlink--;
  566: 				dp->i_flag |= IN_CHANGE;
  567: 				(void)UFS_UPDATE(tdvp, 1);
  568: 			}
  569: 			goto bad;
  570: 		}
  571: 		vput(tdvp);
  572: 	} else {
  573: 		if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
  574: 			panic("ufs_rename: EXDEV");
  575: 		/*
  576: 		 * Short circuit rename(foo, foo).
  577: 		 */
  578: 		if (xp->i_number == ip->i_number)
  579: 			panic("ufs_rename: same file");
  580: 		/*
  581: 		 * If the parent directory is "sticky", then the user must
  582: 		 * own the parent directory, or the destination of the rename,
  583: 		 * otherwise the destination may not be changed (except by
  584: 		 * root). This implements append-only directories.
  585: 		 */
  586: 		if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
  587: 		    tcnp->cn_cred->cr_uid != dp->i_uid &&
  588: 		    xp->i_uid != tcnp->cn_cred->cr_uid) {
  589: 			error = EPERM;
  590: 			goto bad;
  591: 		}
  592: 		/*
  593: 		 * Target must be empty if a directory and have no links
  594: 		 * to it. Also, ensure source and target are compatible
  595: 		 * (both directories, or both not directories).
  596: 		 */
  597: 		if ((xp->i_mode&IFMT) == IFDIR) {
  598: 			if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) || 
  599: 			    xp->i_nlink > 2) {
  600: 				error = ENOTEMPTY;
  601: 				goto bad;
  602: 			}
  603: 			if (!doingdirectory) {
  604: 				error = ENOTDIR;
  605: 				goto bad;
  606: 			}
  607: 			cache_purge(tdvp);
  608: 		} else if (doingdirectory) {
  609: 			error = EISDIR;
  610: 			goto bad;
  611: 		}
  612: 		error = ext2_dirrewrite(dp, ip, tcnp);
  613: 		if (error)
  614: 			goto bad;
  615: 		/*
  616: 		 * If the target directory is in the same
  617: 		 * directory as the source directory,
  618: 		 * decrement the link count on the parent
  619: 		 * of the target directory.
  620: 		 */
  621: 		 if (doingdirectory && !newparent) {
  622: 			dp->i_nlink--;
  623: 			dp->i_flag |= IN_CHANGE;
  624: 		}
  625: 		vput(tdvp);
  626: 		/*
  627: 		 * Adjust the link count of the target to
  628: 		 * reflect the dirrewrite above.  If this is
  629: 		 * a directory it is empty and there are
  630: 		 * no links to it, so we can squash the inode and
  631: 		 * any space associated with it.  We disallowed
  632: 		 * renaming over top of a directory with links to
  633: 		 * it above, as the remaining link would point to
  634: 		 * a directory without "." or ".." entries.
  635: 		 */
  636: 		xp->i_nlink--;
  637: 		if (doingdirectory) {
  638: 			if (--xp->i_nlink != 0)
  639: 				panic("ufs_rename: linked directory");
  640: 			error = UFS_TRUNCATE(tvp, (off_t)0, IO_SYNC,
  641: 			    tcnp->cn_cred, tcnp->cn_td);
  642: 		}
  643: 		xp->i_flag |= IN_CHANGE;
  644: 		vput(tvp);
  645: 		xp = NULL;
  646: 	}
  647: 
  648: 	/*
  649: 	 * 3) Unlink the source.
  650: 	 */
  651: 	fcnp->cn_flags &= ~CNP_MODMASK;
  652: 	fcnp->cn_flags |= CNP_LOCKPARENT | CNP_LOCKLEAF;
  653: 	VREF(fdvp);
  654: 	error = relookup(fdvp, &fvp, fcnp);
  655: 	if (error == 0)
  656: 		vrele(fdvp);
  657: 	if (fvp != NULL) {
  658: 		xp = VTOI(fvp);
  659: 		dp = VTOI(fdvp);
  660: 	} else {
  661: 		/*
  662: 		 * From name has disappeared.
  663: 		 */
  664: 		if (doingdirectory)
  665: 			panic("ufs_rename: lost dir entry");
  666: 		vrele(ap->a_fvp);
  667: 		return (0);
  668: 	}
  669: 	/*
  670: 	 * Ensure that the directory entry still exists and has not
  671: 	 * changed while the new name has been entered. If the source is
  672: 	 * a file then the entry may have been unlinked or renamed. In
  673: 	 * either case there is no further work to be done. If the source
  674: 	 * is a directory then it cannot have been rmdir'ed; its link
  675: 	 * count of three would cause a rmdir to fail with ENOTEMPTY.
  676: 	 * The IN_RENAME flag ensures that it cannot be moved by another
  677: 	 * rename.
  678: 	 */
  679: 	if (xp != ip) {
  680: 		if (doingdirectory)
  681: 			panic("ufs_rename: lost dir entry");
  682: 	} else {
  683: 		/*
  684: 		 * If the source is a directory with a
  685: 		 * new parent, the link count of the old
  686: 		 * parent directory must be decremented
  687: 		 * and ".." set to point to the new parent.
  688: 		 */
  689: 		if (doingdirectory && newparent) {
  690: 			dp->i_nlink--;
  691: 			dp->i_flag |= IN_CHANGE;
  692: 			error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
  693: 				sizeof (struct dirtemplate), (off_t)0,
  694: 				UIO_SYSSPACE, IO_NODELOCKED,
  695: 				tcnp->cn_cred, (int *)0, NULL);
  696: 			if (error == 0) {
  697: 				/* Like ufs little-endian: */
  698: 				namlen = dirbuf.dotdot_type;
  699: 				if (namlen != 2 ||
  700: 				    dirbuf.dotdot_name[0] != '.' ||
  701: 				    dirbuf.dotdot_name[1] != '.') {
  702: 					ufs_dirbad(xp, (doff_t)12,
  703: 					    "rename: mangled dir");
  704: 				} else {
  705: 					dirbuf.dotdot_ino = newparent;
  706: 					(void) vn_rdwr(UIO_WRITE, fvp,
  707: 					    (caddr_t)&dirbuf,
  708: 					    sizeof (struct dirtemplate),
  709: 					    (off_t)0, UIO_SYSSPACE,
  710: 					    IO_NODELOCKED|IO_SYNC,
  711: 					    tcnp->cn_cred, (int *)0,
  712: 					    NULL);
  713: 					cache_purge(fdvp);
  714: 				}
  715: 			}
  716: 		}
  717: 		error = ext2_dirremove(fdvp, fcnp);
  718: 		if (!error) {
  719: 			xp->i_nlink--;
  720: 			xp->i_flag |= IN_CHANGE;
  721: 		}
  722: 		xp->i_flag &= ~IN_RENAME;
  723: 	}
  724: 	if (dp)
  725: 		vput(fdvp);
  726: 	if (xp)
  727: 		vput(fvp);
  728: 	vrele(ap->a_fvp);
  729: 	return (error);
  730: 
  731: bad:
  732: 	if (xp)
  733: 		vput(ITOV(xp));
  734: 	vput(ITOV(dp));
  735: out:
  736: 	if (doingdirectory)
  737: 		ip->i_flag &= ~IN_RENAME;
  738: 	if (vn_lock(fvp, NULL, LK_EXCLUSIVE, td) == 0) {
  739: 		ip->i_nlink--;
  740: 		ip->i_flag |= IN_CHANGE;
  741: 		ip->i_flag &= ~IN_RENAME;
  742: 		vput(fvp);
  743: 	} else
  744: 		vrele(fvp);
  745: 	return (error);
  746: }
  747: 
  748: /*
  749:  * Mkdir system call
  750:  */
  751: static int
  752: ext2_mkdir(ap)
  753: 	struct vop_mkdir_args /* {
  754: 		struct vnode *a_dvp;
  755: 		struct vnode **a_vpp;
  756: 		struct componentname *a_cnp;
  757: 		struct vattr *a_vap;
  758: 	} */ *ap;
  759: {
  760: 	struct vnode *dvp = ap->a_dvp;
  761: 	struct vattr *vap = ap->a_vap;
  762: 	struct componentname *cnp = ap->a_cnp;
  763: 	struct inode *ip, *dp;
  764: 	struct vnode *tvp;
  765: 	struct dirtemplate dirtemplate, *dtp;
  766: 	int error, dmode;
  767: 
  768: #ifdef DIAGNOSTIC
  769: 	if ((cnp->cn_flags & CNP_HASBUF) == 0)
  770: 		panic("ufs_mkdir: no name");
  771: #endif
  772: 	dp = VTOI(dvp);
  773: 	if ((nlink_t)dp->i_nlink >= LINK_MAX) {
  774: 		error = EMLINK;
  775: 		goto out;
  776: 	}
  777: 	dmode = vap->va_mode & 0777;
  778: 	dmode |= IFDIR;
  779: 	/*
  780: 	 * Must simulate part of ext2_makeinode here to acquire the inode,
  781: 	 * but not have it entered in the parent directory. The entry is
  782: 	 * made later after writing "." and ".." entries.
  783: 	 */
  784: 	error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
  785: 	if (error)
  786: 		goto out;
  787: 	ip = VTOI(tvp);
  788: 	ip->i_gid = dp->i_gid;
  789: #ifdef SUIDDIR
  790: 	{
  791: #ifdef QUOTA
  792: 		struct ucred ucred, *ucp;
  793: 		ucp = cnp->cn_cred;
  794: #endif			I
  795: 		/*
  796: 		 * if we are hacking owners here, (only do this where told to)
  797: 		 * and we are not giving it TOO root, (would subvert quotas)
  798: 		 * then go ahead and give it to the other user.
  799: 		 * The new directory also inherits the SUID bit. 
  800: 		 * If user's UID and dir UID are the same,
  801: 		 * 'give it away' so that the SUID is still forced on.
  802: 		 */
  803: 		if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
  804: 		   (dp->i_mode & ISUID) && dp->i_uid) {
  805: 			dmode |= ISUID;
  806: 			ip->i_uid = dp->i_uid;
  807: #ifdef QUOTA
  808: 			if (dp->i_uid != cnp->cn_cred->cr_uid) {
  809: 				/*
  810: 				 * make sure the correct user gets charged
  811: 				 * for the space.
  812: 				 * Make a dummy credential for the victim.
  813: 				 * XXX This seems to never be accessed out of
  814: 				 * our context so a stack variable is ok.
  815: 				 */
  816: 				ucred.cr_ref = 1;
  817: 				ucred.cr_uid = ip->i_uid;
  818: 				ucred.cr_ngroups = 1;
  819: 				ucred.cr_groups[0] = dp->i_gid;
  820: 				ucp = &ucred;
  821: 			}
  822: #endif			I
  823: 		} else {
  824: 			ip->i_uid = cnp->cn_cred->cr_uid;
  825: 		}
  826: #ifdef QUOTA
  827: 		if ((error = getinoquota(ip)) ||
  828: 	    	(error = chkiq(ip, 1, ucp, 0))) {
  829: 			UFS_VFREE(tvp, ip->i_number, dmode);
  830: 			vput(tvp);
  831: 			return (error);
  832: 		}
  833: #endif
  834: 	}
  835: #else
  836: 	ip->i_uid = cnp->cn_cred->cr_uid;
  837: #ifdef QUOTA
  838: 	if ((error = getinoquota(ip)) ||
  839: 	    (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
  840: 		UFS_VFREE(tvp, ip->i_number, dmode);
  841: 		vput(tvp);
  842: 		return (error);
  843: 	}
  844: #endif
  845: #endif
  846: 	ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
  847: 	ip->i_mode = dmode;
  848: 	tvp->v_type = VDIR;	/* Rest init'd in getnewvnode(). */
  849: 	ip->i_nlink = 2;
  850: 	if (cnp->cn_flags & CNP_ISWHITEOUT)
  851: 		ip->i_flags |= UF_OPAQUE;
  852: 	error = UFS_UPDATE(tvp, 1);
  853: 
  854: 	/*
  855: 	 * Bump link count in parent directory
  856: 	 * to reflect work done below.  Should
  857: 	 * be done before reference is created
  858: 	 * so reparation is possible if we crash.
  859: 	 */
  860: 	dp->i_nlink++;
  861: 	dp->i_flag |= IN_CHANGE;
  862: 	error = UFS_UPDATE(dvp, 1);
  863: 	if (error)
  864: 		goto bad;
  865: 
  866: 	/* Initialize directory with "." and ".." from static template. */
  867: 	if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs->s_es,
  868: 	    EXT2_FEATURE_INCOMPAT_FILETYPE))
  869: 		dtp = &mastertemplate;
  870: 	else
  871: 		dtp = &omastertemplate;
  872: 	dirtemplate = *dtp;
  873: 	dirtemplate.dot_ino = ip->i_number;
  874: 	dirtemplate.dotdot_ino = dp->i_number;
  875: 	/* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE 
  876: 	 * so let's just redefine it - for this function only
  877: 	 */
  878: #undef  DIRBLKSIZ 
  879: #define DIRBLKSIZ  VTOI(dvp)->i_e2fs->s_blocksize
  880: 	dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
  881: 	error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
  882: 	    sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
  883: 	    IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, NULL);
  884: 	if (error) {
  885: 		dp->i_nlink--;
  886: 		dp->i_flag |= IN_CHANGE;
  887: 		goto bad;
  888: 	}
  889: 	if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
  890: 		panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */
  891: 	else {
  892: 		ip->i_size = DIRBLKSIZ;
  893: 		ip->i_flag |= IN_CHANGE;
  894: 	}
  895: 
  896: 	/* Directory set up, now install its entry in the parent directory. */
  897: 	error = ext2_direnter(ip, dvp, cnp);
  898: 	if (error) {
  899: 		dp->i_nlink--;
  900: 		dp->i_flag |= IN_CHANGE;
  901: 	}
  902: bad:
  903: 	/*
  904: 	 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
  905: 	 * for us because we set the link count to 0.
  906: 	 */
  907: 	if (error) {
  908: 		ip->i_nlink = 0;
  909: 		ip->i_flag |= IN_CHANGE;
  910: 		vput(tvp);
  911: 	} else
  912: 		*ap->a_vpp = tvp;
  913: out:
  914: 	return (error);
  915: #undef  DIRBLKSIZ
  916: #define DIRBLKSIZ  DEV_BSIZE
  917: }
  918: 
  919: /*
  920:  * Rmdir system call.
  921:  */
  922: static int
  923: ext2_rmdir(ap)
  924: 	struct vop_rmdir_args /* {
  925: 		struct vnode *a_dvp;
  926: 		struct vnode *a_vp;
  927: 		struct componentname *a_cnp;
  928: 	} */ *ap;
  929: {
  930: 	struct vnode *vp = ap->a_vp;
  931: 	struct vnode *dvp = ap->a_dvp;
  932: 	struct componentname *cnp = ap->a_cnp;
  933: 	struct thread *td = cnp->cn_td;
  934: 	struct inode *ip, *dp;
  935: 	int error;
  936: 
  937: 	ip = VTOI(vp);
  938: 	dp = VTOI(dvp);
  939: 
  940: 	/*
  941: 	 * Verify the directory is empty (and valid).
  942: 	 * (Rmdir ".." won't be valid since
  943: 	 *  ".." will contain a reference to
  944: 	 *  the current directory and thus be
  945: 	 *  non-empty.)
  946: 	 */
  947: 	error = 0;
  948: 	if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
  949: 		error = ENOTEMPTY;
  950: 		goto out;
  951: 	}
  952: 	if ((dp->i_flags & APPEND)
  953: 	    || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
  954: 		error = EPERM;
  955: 		goto out;
  956: 	}
  957: 	/*
  958: 	 * Delete reference to directory before purging
  959: 	 * inode.  If we crash in between, the directory
  960: 	 * will be reattached to lost+found,
  961: 	 */
  962: 	error = ext2_dirremove(dvp, cnp);
  963: 	if (error)
  964: 		goto out;
  965: 	dp->i_nlink--;
  966: 	dp->i_flag |= IN_CHANGE;
  967: 	cache_purge(dvp);
  968: 	VOP_UNLOCK(dvp, NULL, 0, td);
  969: 	/*
  970: 	 * Truncate inode.  The only stuff left
  971: 	 * in the directory is "." and "..".  The
  972: 	 * "." reference is inconsequential since
  973: 	 * we're quashing it.  The ".." reference
  974: 	 * has already been adjusted above.  We've
  975: 	 * removed the "." reference and the reference
  976: 	 * in the parent directory, but there may be
  977: 	 * other hard links so decrement by 2 and
  978: 	 * worry about them later.
  979: 	 */
  980: 	ip->i_nlink -= 2;
  981: 	error = UFS_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, td);
  982: 	cache_purge(ITOV(ip));
  983: 	vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
  984: out:
  985: 	return (error);
  986: }
  987: 
  988: /*
  989:  * symlink -- make a symbolic link
  990:  */
  991: static int
  992: ext2_symlink(ap)
  993: 	struct vop_symlink_args /* {
  994: 		struct vnode *a_dvp;
  995: 		struct vnode **a_vpp;
  996: 		struct componentname *a_cnp;
  997: 		struct vattr *a_vap;
  998: 		char *a_target;
  999: 	} */ *ap;
 1000: {
 1001: 	struct vnode *vp, **vpp = ap->a_vpp;
 1002: 	struct inode *ip;
 1003: 	int len, error;
 1004: 
 1005: 	error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
 1006: 	    vpp, ap->a_cnp);
 1007: 	if (error)
 1008: 		return (error);
 1009: 	vp = *vpp;
 1010: 	len = strlen(ap->a_target);
 1011: 	if (len < vp->v_mount->mnt_maxsymlinklen) {
 1012: 		ip = VTOI(vp);
 1013: 		bcopy(ap->a_target, (char *)ip->i_shortlink, len);
 1014: 		ip->i_size = len;
 1015: 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
 1016: 	} else
 1017: 		error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
 1018: 		    UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0,
 1019: 		    NULL);
 1020: 	if (error)
 1021: 		vput(vp);
 1022: 	return (error);
 1023: }
 1024: 
 1025: /*
 1026:  * Allocate a new inode.
 1027:  */
 1028: static int
 1029: ext2_makeinode(mode, dvp, vpp, cnp)
 1030: 	int mode;
 1031: 	struct vnode *dvp;
 1032: 	struct vnode **vpp;
 1033: 	struct componentname *cnp;
 1034: {
 1035: 	struct inode *ip, *pdir;
 1036: 	struct vnode *tvp;
 1037: 	int error;
 1038: 
 1039: 	pdir = VTOI(dvp);
 1040: #ifdef DIAGNOSTIC
 1041: 	if ((cnp->cn_flags & CNP_HASBUF) == 0)
 1042: 		panic("ext2_makeinode: no name");
 1043: #endif
 1044: 	*vpp = NULL;
 1045: 	if ((mode & IFMT) == 0)
 1046: 		mode |= IFREG;
 1047: 
 1048: 	error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
 1049: 	if (error) {
 1050: 		return (error);
 1051: 	}
 1052: 	ip = VTOI(tvp);
 1053: 	ip->i_gid = pdir->i_gid;
 1054: #ifdef SUIDDIR
 1055: 	{
 1056: #ifdef QUOTA
 1057: 		struct ucred ucred, *ucp;
 1058: 		ucp = cnp->cn_cred;
 1059: #endif			I
 1060: 		/*
 1061: 		 * if we are
 1062: 		 * not the owner of the directory,
 1063: 		 * and we are hacking owners here, (only do this where told to)
 1064: 		 * and we are not giving it TOO root, (would subvert quotas)
 1065: 		 * then go ahead and give it to the other user.
 1066: 		 * Note that this drops off the execute bits for security.
 1067: 		 */
 1068: 		if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
 1069: 		     (pdir->i_mode & ISUID) &&
 1070: 		     (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
 1071: 			ip->i_uid = pdir->i_uid;
 1072: 			mode &= ~07111;
 1073: #ifdef QUOTA
 1074: 			/*
 1075: 			 * make sure the correct user gets charged
 1076: 			 * for the space.
 1077: 			 * Quickly knock up a dummy credential for the victim.
 1078: 			 * XXX This seems to never be accessed out of our
 1079: 			 * context so a stack variable is ok.
 1080: 			 */
 1081: 			ucred.cr_ref = 1;
 1082: 			ucred.cr_uid = ip->i_uid;
 1083: 			ucred.cr_ngroups = 1;
 1084: 			ucred.cr_groups[0] = pdir->i_gid;
 1085: 			ucp = &ucred;
 1086: #endif			I
 1087: 		} else {
 1088: 			ip->i_uid = cnp->cn_cred->cr_uid;
 1089: 		}
 1090: 	
 1091: #ifdef QUOTA
 1092: 		if ((error = getinoquota(ip)) ||
 1093: 	    	(error = chkiq(ip, 1, ucp, 0))) {
 1094: 			UFS_VFREE(tvp, ip->i_number, mode);
 1095: 			vput(tvp);
 1096: 			return (error);
 1097: 		}
 1098: #endif
 1099: 	}
 1100: #else
 1101: 	ip->i_uid = cnp->cn_cred->cr_uid;
 1102: #ifdef QUOTA
 1103: 	if ((error = getinoquota(ip)) ||
 1104: 	    (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
 1105: 		UFS_VFREE(tvp, ip->i_number, mode);
 1106: 		vput(tvp);
 1107: 		return (error);
 1108: 	}
 1109: #endif
 1110: #endif
 1111: 	ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
 1112: 	ip->i_mode = mode;
 1113: 	tvp->v_type = IFTOVT(mode);	/* Rest init'd in getnewvnode(). */
 1114: 	ip->i_nlink = 1;
 1115: 	if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
 1116: 	    suser_cred(cnp->cn_cred, PRISON_ROOT))
 1117: 		ip->i_mode &= ~ISGID;
 1118: 
 1119: 	if (cnp->cn_flags & CNP_ISWHITEOUT)
 1120: 		ip->i_flags |= UF_OPAQUE;
 1121: 
 1122: 	/*
 1123: 	 * Make sure inode goes to disk before directory entry.
 1124: 	 */
 1125: 	error = UFS_UPDATE(tvp, 1);
 1126: 	if (error)
 1127: 		goto bad;
 1128: 	error = ext2_direnter(ip, dvp, cnp);
 1129: 	if (error)
 1130: 		goto bad;
 1131: 
 1132: 	*vpp = tvp;
 1133: 	return (0);
 1134: 
 1135: bad:
 1136: 	/*
 1137: 	 * Write error occurred trying to update the inode
 1138: 	 * or the directory so must deallocate the inode.
 1139: 	 */
 1140: 	ip->i_nlink = 0;
 1141: 	ip->i_flag |= IN_CHANGE;
 1142: 	vput(tvp);
 1143: 	return (error);
 1144: }
 1145: 
 1146: /*
 1147:  * get page routine
 1148:  *
 1149:  * XXX By default, wimp out... note that a_offset is ignored (and always
 1150:  * XXX has been).
 1151:  */
 1152: static int
 1153: ext2_getpages(ap)
 1154: 	struct vop_getpages_args *ap;
 1155: {
 1156: 	return (vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
 1157: 		ap->a_reqpage));
 1158: }
 1159: 
 1160: /*
 1161:  * put page routine
 1162:  *
 1163:  * XXX By default, wimp out... note that a_offset is ignored (and always
 1164:  * XXX has been).
 1165:  */
 1166: static int
 1167: ext2_putpages(ap)
 1168: 	struct vop_putpages_args *ap;
 1169: {
 1170: 	return (vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
 1171: 		ap->a_sync, ap->a_rtvals));
 1172: }