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1 parent 9210586 commit b1bd78bced1febd3ae86fcdc190919db1bc195d9 cgd committed Nov 23, 1994
Showing with 2,464 additions and 0 deletions.
  1. +498 −0 sys/ufs/ffs/ffs_vfsops.c
  2. +1,966 −0 sys/ufs/ufs/ufs_vnops.c
View
498 sys/ufs/ffs/ffs_vfsops.c
@@ -0,0 +1,498 @@
+/*
+ * spkr.c -- device driver for console speaker on 80386
+ *
+ * v1.1 by Eric S. Raymond (esr@snark.thyrsus.com) Feb 1990
+ * modified for 386bsd by Andrew A. Chernov <ache@astral.msk.su>
+ * 386bsd only clean version, all SYSV stuff removed
+ * use hz value from param.c
+ *
+ * $Id: spkr.c,v 1.5.4.2 1994/02/02 06:24:43 mycroft Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/errno.h>
+#include <sys/buf.h>
+#include <sys/uio.h>
+
+#include <machine/spkr.h>
+
+#include <i386/isa/isa.h>
+#include <i386/isa/timerreg.h>
+#include <i386/isa/spkrreg.h>
+
+/**************** MACHINE DEPENDENT PART STARTS HERE *************************
+ *
+ * This section defines a function tone() which causes a tone of given
+ * frequency and duration from the 80x86's console speaker.
+ * Another function endtone() is defined to force sound off, and there is
+ * also a rest() entry point to do pauses.
+ *
+ * Audible sound is generated using the Programmable Interval Timer (PIT) and
+ * Programmable Peripheral Interface (PPI) attached to the 80x86's speaker. The
+ * PPI controls whether sound is passed through at all; the PIT's channel 2 is
+ * used to generate clicks (a square wave) of whatever frequency is desired.
+ */
+
+#define SPKRPRI PSOCK
+static char endtone, endrest;
+
+static void
+tone(hz, ticks)
+/* emit tone of frequency hz for given number of ticks */
+ unsigned int hz, ticks;
+{
+ unsigned int divisor = TIMER_DIV(hz);
+ int sps;
+
+#ifdef DEBUG
+ (void) printf("tone: hz=%d ticks=%d\n", hz, ticks);
+#endif /* DEBUG */
+
+ /* set timer to generate clicks at given frequency in Hertz */
+ sps = spltty();
+ outb(TIMER_MODE, PIT_MODE); /* prepare timer */
+ outb(TIMER_CNTR2, divisor & 0xff); /* send lo byte */
+ outb(TIMER_CNTR2, divisor >> 8); /* send hi byte */
+ splx(sps);
+
+ /* turn the speaker on */
+ outb(PITAUX_PORT, inb(PITAUX_PORT) | PIT_SPKR);
+
+ /*
+ * Set timeout to endtone function, then give up the timeslice.
+ * This is so other processes can execute while the tone is being
+ * emitted.
+ */
+ (void) tsleep((caddr_t)&endtone, SPKRPRI | PCATCH, "spkrtn", ticks);
+ outb(PITAUX_PORT, inb(PITAUX_PORT) & ~PIT_SPKR);
+}
+
+static void
+rest(ticks)
+/* rest for given number of ticks */
+ int ticks;
+{
+
+ /*
+ * Set timeout to endrest function, then give up the timeslice.
+ * This is so other processes can execute while the rest is being
+ * waited out.
+ */
+#ifdef DEBUG
+ (void) printf("rest: %d\n", ticks);
+#endif /* DEBUG */
+ (void) tsleep((caddr_t)&endrest, SPKRPRI | PCATCH, "spkrrs", ticks);
+}
+
+/**************** PLAY STRING INTERPRETER BEGINS HERE **********************
+ *
+ * Play string interpretation is modelled on IBM BASIC 2.0's PLAY statement;
+ * M[LNS] are missing and the ~ synonym and octave-tracking facility is added.
+ * Requires tone(), rest(), and endtone(). String play is not interruptible
+ * except possibly at physical block boundaries.
+ */
+
+typedef int bool;
+#define TRUE 1
+#define FALSE 0
+
+#define toupper(c) ((c) - ' ' * (((c) >= 'a') && ((c) <= 'z')))
+#define isdigit(c) (((c) >= '0') && ((c) <= '9'))
+#define dtoi(c) ((c) - '0')
+
+static int octave; /* currently selected octave */
+static int whole; /* whole-note time at current tempo, in ticks */
+static int value; /* whole divisor for note time, quarter note = 1 */
+static int fill; /* controls spacing of notes */
+static bool octtrack; /* octave-tracking on? */
+static bool octprefix; /* override current octave-tracking state? */
+
+/*
+ * Magic number avoidance...
+ */
+#define SECS_PER_MIN 60 /* seconds per minute */
+#define WHOLE_NOTE 4 /* quarter notes per whole note */
+#define MIN_VALUE 64 /* the most we can divide a note by */
+#define DFLT_VALUE 4 /* default value (quarter-note) */
+#define FILLTIME 8 /* for articulation, break note in parts */
+#define STACCATO 6 /* 6/8 = 3/4 of note is filled */
+#define NORMAL 7 /* 7/8ths of note interval is filled */
+#define LEGATO 8 /* all of note interval is filled */
+#define DFLT_OCTAVE 4 /* default octave */
+#define MIN_TEMPO 32 /* minimum tempo */
+#define DFLT_TEMPO 120 /* default tempo */
+#define MAX_TEMPO 255 /* max tempo */
+#define NUM_MULT 3 /* numerator of dot multiplier */
+#define DENOM_MULT 2 /* denominator of dot multiplier */
+
+/* letter to half-tone: A B C D E F G */
+static int notetab[8] = {9, 11, 0, 2, 4, 5, 7};
+
+/*
+ * This is the American Standard A440 Equal-Tempered scale with frequencies
+ * rounded to nearest integer. Thank Goddess for the good ol' CRC Handbook...
+ * our octave 0 is standard octave 2.
+ */
+#define OCTAVE_NOTES 12 /* semitones per octave */
+static int pitchtab[] =
+{
+/* C C# D D# E F F# G G# A A# B*/
+/* 0 */ 65, 69, 73, 78, 82, 87, 93, 98, 103, 110, 117, 123,
+/* 1 */ 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247,
+/* 2 */ 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494,
+/* 3 */ 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988,
+/* 4 */ 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1975,
+/* 5 */ 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951,
+/* 6 */ 4186, 4435, 4698, 4978, 5274, 5588, 5920, 6272, 6644, 7040, 7459, 7902,
+};
+
+static void
+playinit()
+{
+
+ octave = DFLT_OCTAVE;
+ whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / DFLT_TEMPO;
+ fill = NORMAL;
+ value = DFLT_VALUE;
+ octtrack = FALSE;
+ octprefix = TRUE; /* act as though there was an initial O(n) */
+}
+
+static void
+playtone(pitch, value, sustain)
+/* play tone of proper duration for current rhythm signature */
+ int pitch, value, sustain;
+{
+ register int sound, silence, snum = 1, sdenom = 1;
+
+ /* this weirdness avoids floating-point arithmetic */
+ for (; sustain; sustain--) {
+ /* see the BUGS section in the mag page for discussion */
+ snum *= NUM_MULT;
+ sdenom *= DENOM_MULT;
+ }
+
+ if (pitch == -1)
+ rest(whole * snum / (value * sdenom));
+ else {
+ sound = (whole * snum) / (value * sdenom)
+ - (whole * (FILLTIME - fill)) / (value * FILLTIME);
+ silence = whole * (FILLTIME-fill) * snum / (FILLTIME * value * sdenom);
+
+#ifdef DEBUG
+ (void) printf("playtone: pitch %d for %d ticks, rest for %d ticks\n",
+ pitch, sound, silence);
+#endif /* DEBUG */
+
+ tone(pitchtab[pitch], sound);
+ if (fill != LEGATO)
+ error = rest(silence);
+ }
+ return error;
+}
+
+static int
+abs(n)
+ int n;
+{
+ if (n < 0)
+ return -n;
+ else
+ return n;
+}
+
+static void
+playstring(cp, slen)
+/* interpret and play an item from a notation string */
+ char *cp;
+ size_t slen;
+{
+ int pitch, oldfill, lastpitch = OCTAVE_NOTES * DFLT_OCTAVE;
+
+#define GETNUM(cp, v) for(v=0; isdigit(cp[1]) && slen > 0; ) \
+ {v = v * 10 + (*++cp - '0'); slen--;}
+ for (; slen--; cp++) {
+ int sustain, timeval, tempo;
+ register char c = toupper(*cp);
+
+#ifdef DEBUG
+ (void) printf("playstring: %c (%x)\n", c, c);
+#endif /* DEBUG */
+
+ switch (c) {
+ case 'A':
+ case 'B':
+ case 'C':
+ case 'D':
+ case 'E':
+ case 'F':
+ case 'G':
+
+ /* compute pitch */
+ pitch = notetab[c - 'A'] + octave * OCTAVE_NOTES;
+
+ /* this may be followed by an accidental sign */
+ if (cp[1] == '#' || cp[1] == '+') {
+ ++pitch;
+ ++cp;
+ slen--;
+ } else if (cp[1] == '-') {
+ --pitch;
+ ++cp;
+ slen--;
+ }
+
+ /*
+ * If octave-tracking mode is on, and there has been no octave-
+ * setting prefix, find the version of the current letter note
+ * closest to the last regardless of octave.
+ */
+ if (octtrack && !octprefix) {
+ if (abs(pitch-lastpitch) > abs(pitch+OCTAVE_NOTES-lastpitch)) {
+ ++octave;
+ pitch += OCTAVE_NOTES;
+ }
+ if (abs(pitch-lastpitch) > abs((pitch-OCTAVE_NOTES)-lastpitch)) {
+ --octave;
+ pitch -= OCTAVE_NOTES;
+ }
+ }
+ octprefix = FALSE;
+ lastpitch = pitch;
+
+ /* ...which may in turn be followed by an override time value */
+ GETNUM(cp, timeval);
+ if (timeval <= 0 || timeval > MIN_VALUE)
+ timeval = value;
+
+ /* ...and/or sustain dots */
+ for (sustain = 0; cp[1] == '.'; cp++) {
+ slen--;
+ sustain++;
+ }
+
+ /* ...and/or a slur mark */
+ oldfill = fill;
+ if (cp[1] == '_') {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ }
+
+ /* time to emit the actual tone */
+ playtone(pitch, timeval, sustain);
+
+ fill = oldfill;
+ break;
+
+ case 'O':
+ if (cp[1] == 'N' || cp[1] == 'n') {
+ octprefix = octtrack = FALSE;
+ ++cp;
+ slen--;
+ } else if (cp[1] == 'L' || cp[1] == 'l') {
+ octtrack = TRUE;
+ ++cp;
+ slen--;
+ } else {
+ GETNUM(cp, octave);
+ if (octave >= sizeof(pitchtab) / OCTAVE_NOTES)
+ octave = DFLT_OCTAVE;
+ octprefix = TRUE;
+ }
+ break;
+
+ case '>':
+ if (octave < sizeof(pitchtab) / OCTAVE_NOTES - 1)
+ octave++;
+ octprefix = TRUE;
+ break;
+
+ case '<':
+ if (octave > 0)
+ octave--;
+ octprefix = TRUE;
+ break;
+
+ case 'N':
+ GETNUM(cp, pitch);
+ for (sustain = 0; cp[1] == '.'; cp++) {
+ slen--;
+ sustain++;
+ }
+
+ oldfill = fill;
+ if (cp[1] == '_') {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ }
+
+ playtone(pitch - 1, value, sustain);
+
+ fill = oldfill;
+ break;
+
+ case 'L':
+ GETNUM(cp, value);
+ if (value <= 0 || value > MIN_VALUE)
+ value = DFLT_VALUE;
+ break;
+
+ case 'P':
+ case '~':
+ /* this may be followed by an override time value */
+ GETNUM(cp, timeval);
+ if (timeval <= 0 || timeval > MIN_VALUE)
+ timeval = value;
+ for (sustain = 0; cp[1] == '.'; cp++) {
+ slen--;
+ sustain++;
+ }
+ playtone(-1, timeval, sustain);
+ break;
+
+ case 'T':
+ GETNUM(cp, tempo);
+ if (tempo < MIN_TEMPO || tempo > MAX_TEMPO)
+ tempo = DFLT_TEMPO;
+ whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / tempo;
+ break;
+
+ case 'M':
+ if (cp[1] == 'N' || cp[1] == 'n') {
+ fill = NORMAL;
+ ++cp;
+ slen--;
+ } else if (cp[1] == 'L' || cp[1] == 'l') {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ } else if (cp[1] == 'S' || cp[1] == 's') {
+ fill = STACCATO;
+ ++cp;
+ slen--;
+ }
+ break;
+ }
+ }
+}
+
+/******************* UNIX DRIVER HOOKS BEGIN HERE **************************
+ *
+ * This section implements driver hooks to run playstring() and the tone(),
+ * endtone(), and rest() functions defined above.
+ */
+
+static int spkr_active; /* exclusion flag */
+static struct buf *spkr_inbuf; /* incoming buf */
+
+int
+spkropen(dev)
+ dev_t dev;
+{
+#ifdef DEBUG
+ (void) printf("spkropen: entering with dev = %x\n", dev);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return ENXIO;
+ else if (spkr_active)
+ return EBUSY;
+
+#ifdef DEBUG
+ (void) printf("spkropen: about to perform play initialization\n");
+#endif /* DEBUG */
+ playinit();
+ spkr_inbuf = geteblk(DEV_BSIZE);
+ spkr_active = TRUE;
+ return 0;
+}
+
+int
+spkrwrite(dev, uio)
+ dev_t dev;
+ struct uio *uio;
+{
+ register unsigned n;
+ char *cp;
+ int error;
+#ifdef DEBUG
+ (void) printf("spkrwrite: entering with dev = %x, count = %d\n",
+ dev, uio->uio_resid);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return ENXIO;
+ else if (uio->uio_resid > DEV_BSIZE)
+ return E2BIG;
+
+ n = MIN(DEV_BSIZE, uio->uio_resid);
+ cp = spkr_inbuf->b_un.b_addr;
+ error = uiomove(cp, n, uio);
+ if (error)
+ return error;
+ playstring(cp, n);
+ return 0;
+}
+
+int
+spkrclose(dev)
+ dev_t dev;
+{
+#ifdef DEBUG
+ (void) printf("spkrclose: entering with dev = %x\n", dev);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return ENXIO;
+
+ wakeup((caddr_t)&endtone);
+ wakeup((caddr_t)&endrest);
+ brelse(spkr_inbuf);
+ spkr_active = FALSE;
+ return 0;
+}
+
+int
+spkrioctl(dev, cmd, cmdarg)
+ dev_t dev;
+ int cmd;
+ caddr_t cmdarg;
+{
+#ifdef DEBUG
+ (void) printf("spkrioctl: entering with dev = %x, cmd = %x\n", dev, cmd);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return ENXIO;
+
+ if (cmd == SPKRTONE) {
+ tone_t *tp = (tone_t *)cmdarg;
+
+ if (tp->frequency == 0)
+ rest(tp->duration);
+ else
+ tone(tp->frequency, tp->duration);
+ return 0;
+ } else if (cmd == SPKRTUNE) {
+ tone_t *tp = (tone_t *)(*(caddr_t *)cmdarg);
+ tone_t ttp;
+ int error;
+
+ for (; ; tp++) {
+ error = copyin(tp, &ttp, sizeof(tone_t));
+ if (error)
+ return error;
+ if (ttp.duration == 0)
+ break;
+ if (ttp.frequency == 0)
+ rest(ttp.duration);
+ else
+ tone(ttp.frequency, ttp.duration);
+ }
+ return 0;
+ } else
+ return EINVAL;
+}
View
1,966 sys/ufs/ufs/ufs_vnops.c
@@ -0,0 +1,1966 @@
+/* $NetBSD: ufs_vnops.c,v 1.3.2.3 1994/11/23 08:50:13 cgd Exp $ */
+
+/*
+ * Copyright (c) 1982, 1986, 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)ufs_vnops.c 8.10 (Berkeley) 4/1/94
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/resourcevar.h>
+#include <sys/kernel.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/buf.h>
+#include <sys/proc.h>
+#include <sys/conf.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/dirent.h>
+#include <sys/lockf.h>
+
+#include <vm/vm.h>
+
+#include <miscfs/specfs/specdev.h>
+
+#include <ufs/ufs/quota.h>
+#include <ufs/ufs/inode.h>
+#include <ufs/ufs/dir.h>
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/ufs_extern.h>
+
+static int ufs_chmod __P((struct vnode *, int, struct ucred *, struct proc *));
+static int ufs_chown
+ __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *));
+
+union _qcvt {
+ quad_t qcvt;
+ long val[2];
+};
+#define SETHIGH(q, h) { \
+ union _qcvt tmp; \
+ tmp.qcvt = (q); \
+ tmp.val[_QUAD_HIGHWORD] = (h); \
+ (q) = tmp.qcvt; \
+}
+#define SETLOW(q, l) { \
+ union _qcvt tmp; \
+ tmp.qcvt = (q); \
+ tmp.val[_QUAD_LOWWORD] = (l); \
+ (q) = tmp.qcvt; \
+}
+
+/*
+ * Create a regular file
+ */
+int
+ufs_create(ap)
+ struct vop_create_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ int error;
+
+ if (error =
+ ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
+ ap->a_dvp, ap->a_vpp, ap->a_cnp))
+ return (error);
+ return (0);
+}
+
+/*
+ * Mknod vnode call
+ */
+/* ARGSUSED */
+int
+ufs_mknod(ap)
+ struct vop_mknod_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ register struct vattr *vap = ap->a_vap;
+ register struct vnode **vpp = ap->a_vpp;
+ register struct inode *ip;
+ int error;
+
+ if (error =
+ ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
+ ap->a_dvp, vpp, ap->a_cnp))
+ return (error);
+ ip = VTOI(*vpp);
+ ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
+ if (vap->va_rdev != VNOVAL) {
+ /*
+ * Want to be able to use this to make badblock
+ * inodes, so don't truncate the dev number.
+ */
+ ip->i_rdev = vap->va_rdev;
+ }
+ /*
+ * Remove inode so that it will be reloaded by VFS_VGET and
+ * checked to see if it is an alias of an existing entry in
+ * the inode cache.
+ */
+ vput(*vpp);
+ (*vpp)->v_type = VNON;
+ vgone(*vpp);
+ *vpp = 0;
+ return (0);
+}
+
+/*
+ * Open called.
+ *
+ * Nothing to do.
+ */
+/* ARGSUSED */
+int
+ufs_open(ap)
+ struct vop_open_args /* {
+ struct vnode *a_vp;
+ int a_mode;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+
+ /*
+ * Files marked append-only must be opened for appending.
+ */
+ if ((VTOI(ap->a_vp)->i_flags & APPEND) &&
+ (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
+ return (EPERM);
+ return (0);
+}
+
+/*
+ * Close called.
+ *
+ * Update the times on the inode.
+ */
+/* ARGSUSED */
+int
+ufs_close(ap)
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED))
+ ITIMES(ip, &time, &time);
+ return (0);
+}
+
+int
+ufs_access(ap)
+ struct vop_access_args /* {
+ struct vnode *a_vp;
+ int a_mode;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ register struct ucred *cred = ap->a_cred;
+ mode_t mask, mode = ap->a_mode;
+ register gid_t *gp;
+ int i, error;
+
+#ifdef DIAGNOSTIC
+ if (!VOP_ISLOCKED(vp)) {
+ vprint("ufs_access: not locked", vp);
+ panic("ufs_access: not locked");
+ }
+#endif
+#ifdef QUOTA
+ if (mode & VWRITE)
+ switch (vp->v_type) {
+ case VDIR:
+ case VLNK:
+ case VREG:
+ if (error = getinoquota(ip))
+ return (error);
+ break;
+ }
+#endif
+
+ /* If immutable bit set, nobody gets to write it. */
+ if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE))
+ return (EPERM);
+
+ /* Otherwise, user id 0 always gets access. */
+ if (cred->cr_uid == 0)
+ return (0);
+
+ mask = 0;
+
+ /* Otherwise, check the owner. */
+ if (cred->cr_uid == ip->i_uid) {
+ if (mode & VEXEC)
+ mask |= S_IXUSR;
+ if (mode & VREAD)
+ mask |= S_IRUSR;
+ if (mode & VWRITE)
+ mask |= S_IWUSR;
+ return ((ip->i_mode & mask) == mask ? 0 : EACCES);
+ }
+
+ /* Otherwise, check the groups. */
+ for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
+ if (ip->i_gid == *gp) {
+ if (mode & VEXEC)
+ mask |= S_IXGRP;
+ if (mode & VREAD)
+ mask |= S_IRGRP;
+ if (mode & VWRITE)
+ mask |= S_IWGRP;
+ return ((ip->i_mode & mask) == mask ? 0 : EACCES);
+ }
+
+ /* Otherwise, check everyone else. */
+ if (mode & VEXEC)
+ mask |= S_IXOTH;
+ if (mode & VREAD)
+ mask |= S_IROTH;
+ if (mode & VWRITE)
+ mask |= S_IWOTH;
+ return ((ip->i_mode & mask) == mask ? 0 : EACCES);
+}
+
+/* ARGSUSED */
+int
+ufs_getattr(ap)
+ struct vop_getattr_args /* {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ register struct vattr *vap = ap->a_vap;
+
+ ITIMES(ip, &time, &time);
+ /*
+ * Copy from inode table
+ */
+ vap->va_fsid = ip->i_dev;
+ vap->va_fileid = ip->i_number;
+ vap->va_mode = ip->i_mode & ~IFMT;
+ vap->va_nlink = ip->i_nlink;
+ vap->va_uid = ip->i_uid;
+ vap->va_gid = ip->i_gid;
+ vap->va_rdev = (dev_t)ip->i_rdev;
+ vap->va_size = ip->i_din.di_size;
+ vap->va_atime = ip->i_atime;
+ vap->va_mtime = ip->i_mtime;
+ vap->va_ctime = ip->i_ctime;
+ vap->va_flags = ip->i_flags;
+ vap->va_gen = ip->i_gen;
+ /* this doesn't belong here */
+ if (vp->v_type == VBLK)
+ vap->va_blocksize = BLKDEV_IOSIZE;
+ else if (vp->v_type == VCHR)
+ vap->va_blocksize = MAXBSIZE;
+ else
+ vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
+ vap->va_bytes = dbtob(ip->i_blocks);
+ vap->va_type = vp->v_type;
+ vap->va_filerev = ip->i_modrev;
+ return (0);
+}
+
+/*
+ * Set attribute vnode op. called from several syscalls
+ */
+int
+ufs_setattr(ap)
+ struct vop_setattr_args /* {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vattr *vap = ap->a_vap;
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ register struct ucred *cred = ap->a_cred;
+ register struct proc *p = ap->a_p;
+ struct timeval atimeval, mtimeval;
+ int error;
+
+ /*
+ * Check for unsettable attributes.
+ */
+ if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
+ (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
+ (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
+ ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
+ return (EINVAL);
+ }
+ if (vap->va_flags != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ if (cred->cr_uid == 0) {
+ if ((ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) &&
+ securelevel > 0)
+ return (EPERM);
+ ip->i_flags = vap->va_flags;
+ } else {
+ if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND))
+ return (EPERM);
+ ip->i_flags &= SF_SETTABLE;
+ ip->i_flags |= (vap->va_flags & UF_SETTABLE);
+ }
+ ip->i_flag |= IN_CHANGE;
+ if (vap->va_flags & (IMMUTABLE | APPEND))
+ return (0);
+ }
+ if (ip->i_flags & (IMMUTABLE | APPEND))
+ return (EPERM);
+ /*
+ * Go through the fields and update iff not VNOVAL.
+ */
+ if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL)
+ if (error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, p))
+ return (error);
+ if (vap->va_size != VNOVAL) {
+ if (vp->v_type == VDIR)
+ return (EISDIR);
+ if (error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p))
+ return (error);
+ }
+ ip = VTOI(vp);
+ if (vap->va_atime.ts_sec != VNOVAL || vap->va_mtime.ts_sec != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)) &&
+ ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
+ (error = VOP_ACCESS(vp, VWRITE, cred, p))))
+ return (error);
+ if (vap->va_atime.ts_sec != VNOVAL)
+ ip->i_flag |= IN_ACCESS;
+ if (vap->va_mtime.ts_sec != VNOVAL)
+ ip->i_flag |= IN_CHANGE | IN_UPDATE;
+ atimeval.tv_sec = vap->va_atime.ts_sec;
+ atimeval.tv_usec = vap->va_atime.ts_nsec / 1000;
+ mtimeval.tv_sec = vap->va_mtime.ts_sec;
+ mtimeval.tv_usec = vap->va_mtime.ts_nsec / 1000;
+ if (error = VOP_UPDATE(vp, &atimeval, &mtimeval, 1))
+ return (error);
+ }
+ error = 0;
+ if (vap->va_mode != (mode_t)VNOVAL)
+ error = ufs_chmod(vp, (int)vap->va_mode, cred, p);
+ return (error);
+}
+
+/*
+ * Change the mode on a file.
+ * Inode must be locked before calling.
+ */
+static int
+ufs_chmod(vp, mode, cred, p)
+ register struct vnode *vp;
+ register int mode;
+ register struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ int error;
+
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ if (cred->cr_uid) {
+ if (vp->v_type != VDIR && (mode & S_ISTXT))
+ return (EFTYPE);
+ if (!groupmember(ip->i_gid, cred) && (mode & ISGID))
+ return (EPERM);
+ }
+ ip->i_mode &= ~ALLPERMS;
+ ip->i_mode |= (mode & ALLPERMS);
+ ip->i_flag |= IN_CHANGE;
+ if ((vp->v_flag & VTEXT) && (ip->i_mode & S_ISTXT) == 0)
+ (void) vnode_pager_uncache(vp);
+ return (0);
+}
+
+/*
+ * Perform chown operation on inode ip;
+ * inode must be locked prior to call.
+ */
+static int
+ufs_chown(vp, uid, gid, cred, p)
+ register struct vnode *vp;
+ uid_t uid;
+ gid_t gid;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ uid_t ouid;
+ gid_t ogid;
+ int error = 0;
+#ifdef QUOTA
+ register int i;
+ long change;
+#endif
+
+ if (uid == (uid_t)VNOVAL)
+ uid = ip->i_uid;
+ if (gid == (gid_t)VNOVAL)
+ gid = ip->i_gid;
+ /*
+ * If we don't own the file, are trying to change the owner
+ * of the file, or are not a member of the target group,
+ * the caller must be superuser or the call fails.
+ */
+ if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
+ !groupmember((gid_t)gid, cred)) &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ ogid = ip->i_gid;
+ ouid = ip->i_uid;
+#ifdef QUOTA
+ if (error = getinoquota(ip))
+ return (error);
+ if (ouid == uid) {
+ dqrele(vp, ip->i_dquot[USRQUOTA]);
+ ip->i_dquot[USRQUOTA] = NODQUOT;
+ }
+ if (ogid == gid) {
+ dqrele(vp, ip->i_dquot[GRPQUOTA]);
+ ip->i_dquot[GRPQUOTA] = NODQUOT;
+ }
+ change = ip->i_blocks;
+ (void) chkdq(ip, -change, cred, CHOWN);
+ (void) chkiq(ip, -1, cred, CHOWN);
+ for (i = 0; i < MAXQUOTAS; i++) {
+ dqrele(vp, ip->i_dquot[i]);
+ ip->i_dquot[i] = NODQUOT;
+ }
+#endif
+ ip->i_gid = gid;
+ ip->i_uid = uid;
+#ifdef QUOTA
+ if ((error = getinoquota(ip)) == 0) {
+ if (ouid == uid) {
+ dqrele(vp, ip->i_dquot[USRQUOTA]);
+ ip->i_dquot[USRQUOTA] = NODQUOT;
+ }
+ if (ogid == gid) {
+ dqrele(vp, ip->i_dquot[GRPQUOTA]);
+ ip->i_dquot[GRPQUOTA] = NODQUOT;
+ }
+ if ((error = chkdq(ip, change, cred, CHOWN)) == 0) {
+ if ((error = chkiq(ip, 1, cred, CHOWN)) == 0)
+ goto good;
+ else
+ (void) chkdq(ip, -change, cred, CHOWN|FORCE);
+ }
+ for (i = 0; i < MAXQUOTAS; i++) {
+ dqrele(vp, ip->i_dquot[i]);
+ ip->i_dquot[i] = NODQUOT;
+ }
+ }
+ ip->i_gid = ogid;
+ ip->i_uid = ouid;
+ if (getinoquota(ip) == 0) {
+ if (ouid == uid) {
+ dqrele(vp, ip->i_dquot[USRQUOTA]);
+ ip->i_dquot[USRQUOTA] = NODQUOT;
+ }
+ if (ogid == gid) {
+ dqrele(vp, ip->i_dquot[GRPQUOTA]);
+ ip->i_dquot[GRPQUOTA] = NODQUOT;
+ }
+ (void) chkdq(ip, change, cred, FORCE|CHOWN);
+ (void) chkiq(ip, 1, cred, FORCE|CHOWN);
+ (void) getinoquota(ip);
+ }
+ return (error);
+good:
+ if (getinoquota(ip))
+ panic("chown: lost quota");
+#endif /* QUOTA */
+ if (ouid != uid || ogid != gid)
+ ip->i_flag |= IN_CHANGE;
+ if (ouid != uid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISUID;
+ if (ogid != gid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISGID;
+ return (0);
+}
+
+/* ARGSUSED */
+int
+ufs_ioctl(ap)
+ struct vop_ioctl_args /* {
+ struct vnode *a_vp;
+ int a_command;
+ caddr_t a_data;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+
+ return (ENOTTY);
+}
+
+/* ARGSUSED */
+int
+ufs_select(ap)
+ struct vop_select_args /* {
+ struct vnode *a_vp;
+ int a_which;
+ int a_fflags;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+
+ /*
+ * We should really check to see if I/O is possible.
+ */
+ return (1);
+}
+
+/*
+ * Mmap a file
+ *
+ * NB Currently unsupported.
+ */
+/* ARGSUSED */
+int
+ufs_mmap(ap)
+ struct vop_mmap_args /* {
+ struct vnode *a_vp;
+ int a_fflags;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+
+ return (EINVAL);
+}
+
+/*
+ * Seek on a file
+ *
+ * Nothing to do, so just return.
+ */
+/* ARGSUSED */
+int
+ufs_seek(ap)
+ struct vop_seek_args /* {
+ struct vnode *a_vp;
+ off_t a_oldoff;
+ off_t a_newoff;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+
+ return (0);
+}
+
+int
+ufs_remove(ap)
+ struct vop_remove_args /* {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ register struct inode *ip;
+ register struct vnode *vp = ap->a_vp;
+ register struct vnode *dvp = ap->a_dvp;
+ int error;
+
+ ip = VTOI(vp);
+ if ((ip->i_flags & (IMMUTABLE | APPEND)) ||
+ (VTOI(dvp)->i_flags & APPEND)) {
+ error = EPERM;
+ goto out;
+ }
+ if ((error = ufs_dirremove(dvp, ap->a_cnp)) == 0) {
+ ip->i_nlink--;
+ ip->i_flag |= IN_CHANGE;
+ }
+out:
+ if (dvp == vp)
+ vrele(vp);
+ else
+ vput(vp);
+ vput(dvp);
+ return (error);
+}
+
+/*
+ * link vnode call
+ */
+int
+ufs_link(ap)
+ struct vop_link_args /* {
+ struct vnode *a_vp;
+ struct vnode *a_tdvp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct vnode *tdvp = ap->a_tdvp;
+ register struct componentname *cnp = ap->a_cnp;
+ register struct inode *ip;
+ struct timeval tv;
+ int error;
+
+#ifdef DIAGNOSTIC
+ if ((cnp->cn_flags & HASBUF) == 0)
+ panic("ufs_link: no name");
+#endif
+ if (vp->v_mount != tdvp->v_mount) {
+ VOP_ABORTOP(vp, cnp);
+ error = EXDEV;
+ goto out2;
+ }
+ if (vp != tdvp && (error = VOP_LOCK(tdvp))) {
+ VOP_ABORTOP(vp, cnp);
+ goto out2;
+ }
+ ip = VTOI(tdvp);
+ if ((nlink_t)ip->i_nlink >= LINK_MAX) {
+ VOP_ABORTOP(vp, cnp);
+ error = EMLINK;
+ goto out1;
+ }
+ if (ip->i_flags & (IMMUTABLE | APPEND)) {
+ VOP_ABORTOP(vp, cnp);
+ error = EPERM;
+ goto out1;
+ }
+ ip->i_nlink++;
+ ip->i_flag |= IN_CHANGE;
+ tv = time;
+ error = VOP_UPDATE(tdvp, &tv, &tv, 1);
+ if (!error)
+ error = ufs_direnter(ip, vp, cnp);
+ if (error) {
+ ip->i_nlink--;
+ ip->i_flag |= IN_CHANGE;
+ }
+ FREE(cnp->cn_pnbuf, M_NAMEI);
+out1:
+ if (vp != tdvp)
+ VOP_UNLOCK(tdvp);
+out2:
+ vput(vp);
+ return (error);
+}
+
+/*
+ * Rename system call.
+ * rename("foo", "bar");
+ * is essentially
+ * unlink("bar");
+ * link("foo", "bar");
+ * unlink("foo");
+ * but ``atomically''. Can't do full commit without saving state in the
+ * inode on disk which isn't feasible at this time. Best we can do is
+ * always guarantee the target exists.
+ *
+ * Basic algorithm is:
+ *
+ * 1) Bump link count on source while we're linking it to the
+ * target. This also ensure the inode won't be deleted out
+ * from underneath us while we work (it may be truncated by
+ * a concurrent `trunc' or `open' for creation).
+ * 2) Link source to destination. If destination already exists,
+ * delete it first.
+ * 3) Unlink source reference to inode if still around. If a
+ * directory was moved and the parent of the destination
+ * is different from the source, patch the ".." entry in the
+ * directory.
+ */
+int
+ufs_rename(ap)
+ struct vop_rename_args /* {
+ struct vnode *a_fdvp;
+ struct vnode *a_fvp;
+ struct componentname *a_fcnp;
+ struct vnode *a_tdvp;
+ struct vnode *a_tvp;
+ struct componentname *a_tcnp;
+ } */ *ap;
+{
+ struct vnode *tvp = ap->a_tvp;
+ register struct vnode *tdvp = ap->a_tdvp;
+ struct vnode *fvp = ap->a_fvp;
+ register struct vnode *fdvp = ap->a_fdvp;
+ register struct componentname *tcnp = ap->a_tcnp;
+ register struct componentname *fcnp = ap->a_fcnp;
+ register struct inode *ip, *xp, *dp;
+ struct dirtemplate dirbuf;
+ struct timeval tv;
+ int doingdirectory = 0, oldparent = 0, newparent = 0;
+ int error = 0;
+ u_char namlen;
+
+#ifdef DIAGNOSTIC
+ if ((tcnp->cn_flags & HASBUF) == 0 ||
+ (fcnp->cn_flags & HASBUF) == 0)
+ panic("ufs_rename: no name");
+#endif
+ /*
+ * Check for cross-device rename.
+ */
+ if ((fvp->v_mount != tdvp->v_mount) ||
+ (tvp && (fvp->v_mount != tvp->v_mount))) {
+ error = EXDEV;
+abortit:
+ VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */
+ if (tdvp == tvp)
+ vrele(tdvp);
+ else
+ vput(tdvp);
+ if (tvp)
+ vput(tvp);
+ VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */
+ vrele(fdvp);
+ vrele(fvp);
+ return (error);
+ }
+
+ /*
+ * Check if just deleting a link name.
+ */
+ if (tvp && ((VTOI(tvp)->i_flags & (IMMUTABLE | APPEND)) ||
+ (VTOI(tdvp)->i_flags & APPEND))) {
+ error = EPERM;
+ goto abortit;
+ }
+ if (fvp == tvp) {
+ if (fvp->v_type == VDIR) {
+ error = EINVAL;
+ goto abortit;
+ }
+ VOP_ABORTOP(fdvp, fcnp);
+ vrele(fdvp);
+ vrele(fvp);
+ vput(tdvp);
+ vput(tvp);
+ tcnp->cn_flags &= ~MODMASK;
+ tcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
+ if ((tcnp->cn_flags & SAVESTART) == 0)
+ panic("ufs_rename: lost from startdir");
+ tcnp->cn_nameiop = DELETE;
+ (void) relookup(tdvp, &tvp, tcnp);
+ return (VOP_REMOVE(tdvp, tvp, tcnp));
+ }
+ if (error = VOP_LOCK(fvp))
+ goto abortit;
+ dp = VTOI(fdvp);
+ ip = VTOI(fvp);
+ if ((ip->i_flags & (IMMUTABLE | APPEND)) || (dp->i_flags & APPEND)) {
+ VOP_UNLOCK(fvp);
+ error = EPERM;
+ goto abortit;
+ }
+ if ((ip->i_mode & IFMT) == IFDIR) {
+ /*
+ * Avoid ".", "..", and aliases of "." for obvious reasons.
+ */
+ if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
+ dp == ip || (fcnp->cn_flags&ISDOTDOT) ||
+ (ip->i_flag & IN_RENAME)) {
+ VOP_UNLOCK(fvp);
+ error = EINVAL;
+ goto abortit;
+ }
+ ip->i_flag |= IN_RENAME;
+ oldparent = dp->i_number;
+ doingdirectory++;
+ }
+ vrele(fdvp);
+
+ /*
+ * When the target exists, both the directory
+ * and target vnodes are returned locked.
+ */
+ dp = VTOI(tdvp);
+ xp = NULL;
+ if (tvp)
+ xp = VTOI(tvp);
+
+ /*
+ * 1) Bump link count while we're moving stuff
+ * around. If we crash somewhere before
+ * completing our work, the link count
+ * may be wrong, but correctable.
+ */
+ ip->i_nlink++;
+ ip->i_flag |= IN_CHANGE;
+ tv = time;
+ if (error = VOP_UPDATE(fvp, &tv, &tv, 1)) {
+ VOP_UNLOCK(fvp);
+ goto bad;
+ }
+
+ /*
+ * If ".." must be changed (ie the directory gets a new
+ * parent) then the source directory must not be in the
+ * directory heirarchy above the target, as this would
+ * orphan everything below the source directory. Also
+ * the user must have write permission in the source so
+ * as to be able to change "..". We must repeat the call
+ * to namei, as the parent directory is unlocked by the
+ * call to checkpath().
+ */
+ error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc);
+ VOP_UNLOCK(fvp);
+ if (oldparent != dp->i_number)
+ newparent = dp->i_number;
+ if (doingdirectory && newparent) {
+ if (error) /* write access check above */
+ goto bad;
+ if (xp != NULL)
+ vput(tvp);
+ if (error = ufs_checkpath(ip, dp, tcnp->cn_cred))
+ goto out;
+ if ((tcnp->cn_flags & SAVESTART) == 0)
+ panic("ufs_rename: lost to startdir");
+ if (error = relookup(tdvp, &tvp, tcnp))
+ goto out;
+ dp = VTOI(tdvp);
+ xp = NULL;
+ if (tvp)
+ xp = VTOI(tvp);
+ }
+ /*
+ * 2) If target doesn't exist, link the target
+ * to the source and unlink the source.
+ * Otherwise, rewrite the target directory
+ * entry to reference the source inode and
+ * expunge the original entry's existence.
+ */
+ if (xp == NULL) {
+ if (dp->i_dev != ip->i_dev)
+ panic("rename: EXDEV");
+ /*
+ * Account for ".." in new directory.
+ * When source and destination have the same
+ * parent we don't fool with the link count.
+ */
+ if (doingdirectory && newparent) {
+ if ((nlink_t)dp->i_nlink >= LINK_MAX) {
+ error = EMLINK;
+ goto bad;
+ }
+ dp->i_nlink++;
+ dp->i_flag |= IN_CHANGE;
+ if (error = VOP_UPDATE(tdvp, &tv, &tv, 1))
+ goto bad;
+ }
+ if (error = ufs_direnter(ip, tdvp, tcnp)) {
+ if (doingdirectory && newparent) {
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ (void)VOP_UPDATE(tdvp, &tv, &tv, 1);
+ }
+ goto bad;
+ }
+ vput(tdvp);
+ } else {
+ if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
+ panic("rename: EXDEV");
+ /*
+ * Short circuit rename(foo, foo).
+ */
+ if (xp->i_number == ip->i_number)
+ panic("rename: same file");
+ /*
+ * If the parent directory is "sticky", then the user must
+ * own the parent directory, or the destination of the rename,
+ * otherwise the destination may not be changed (except by
+ * root). This implements append-only directories.
+ */
+ if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
+ tcnp->cn_cred->cr_uid != dp->i_uid &&
+ xp->i_uid != tcnp->cn_cred->cr_uid) {
+ error = EPERM;
+ goto bad;
+ }
+ /*
+ * Target must be empty if a directory and have no links
+ * to it. Also, ensure source and target are compatible
+ * (both directories, or both not directories).
+ */
+ if ((xp->i_mode&IFMT) == IFDIR) {
+ if (!ufs_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
+ xp->i_nlink > 2) {
+ error = ENOTEMPTY;
+ goto bad;
+ }
+ if (!doingdirectory) {
+ error = ENOTDIR;
+ goto bad;
+ }
+ cache_purge(tdvp);
+ } else if (doingdirectory) {
+ error = EISDIR;
+ goto bad;
+ }
+ if (error = ufs_dirrewrite(dp, ip, tcnp))
+ goto bad;
+ /*
+ * If the target directory is in the same
+ * directory as the source directory,
+ * decrement the link count on the parent
+ * of the target directory.
+ */
+ if (doingdirectory && !newparent) {
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ }
+ vput(tdvp);
+ /*
+ * Adjust the link count of the target to
+ * reflect the dirrewrite above. If this is
+ * a directory it is empty and there are
+ * no links to it, so we can squash the inode and
+ * any space associated with it. We disallowed
+ * renaming over top of a directory with links to
+ * it above, as the remaining link would point to
+ * a directory without "." or ".." entries.
+ */
+ xp->i_nlink--;
+ if (doingdirectory) {
+ if (--xp->i_nlink != 0)
+ panic("rename: linked directory");
+ error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC,
+ tcnp->cn_cred, tcnp->cn_proc);
+ }
+ xp->i_flag |= IN_CHANGE;
+ vput(tvp);
+ xp = NULL;
+ }
+
+ /*
+ * 3) Unlink the source.
+ */
+ fcnp->cn_flags &= ~MODMASK;
+ fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
+ if ((fcnp->cn_flags & SAVESTART) == 0)
+ panic("ufs_rename: lost from startdir");
+ (void) relookup(fdvp, &fvp, fcnp);
+ if (fvp != NULL) {
+ xp = VTOI(fvp);
+ dp = VTOI(fdvp);
+ } else {
+ /*
+ * From name has disappeared.
+ */
+ if (doingdirectory)
+ panic("rename: lost dir entry");
+ vrele(ap->a_fvp);
+ return (0);
+ }
+ /*
+ * Ensure that the directory entry still exists and has not
+ * changed while the new name has been entered. If the source is
+ * a file then the entry may have been unlinked or renamed. In
+ * either case there is no further work to be done. If the source
+ * is a directory then it cannot have been rmdir'ed; its link
+ * count of three would cause a rmdir to fail with ENOTEMPTY.
+ * The IRENAME flag ensures that it cannot be moved by another
+ * rename.
+ */
+ if (xp != ip) {
+ if (doingdirectory)
+ panic("rename: lost dir entry");
+ } else {
+ /*
+ * If the source is a directory with a
+ * new parent, the link count of the old
+ * parent directory must be decremented
+ * and ".." set to point to the new parent.
+ */
+ if (doingdirectory && newparent) {
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate), (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED,
+ tcnp->cn_cred, (int *)0, (struct proc *)0);
+ if (error == 0) {
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (fvp->v_mount->mnt_maxsymlinklen <= 0)
+ namlen = dirbuf.dotdot_type;
+ else
+ namlen = dirbuf.dotdot_namlen;
+# else
+ namlen = dirbuf.dotdot_namlen;
+# endif
+ if (namlen != 2 ||
+ dirbuf.dotdot_name[0] != '.' ||
+ dirbuf.dotdot_name[1] != '.') {
+ ufs_dirbad(xp, (doff_t)12,
+ "rename: mangled dir");
+ } else {
+ dirbuf.dotdot_ino = newparent;
+ (void) vn_rdwr(UIO_WRITE, fvp,
+ (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate),
+ (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC,
+ tcnp->cn_cred, (int *)0,
+ (struct proc *)0);
+ cache_purge(fdvp);
+ }
+ }
+ }
+ error = ufs_dirremove(fdvp, fcnp);
+ if (!error) {
+ xp->i_nlink--;
+ xp->i_flag |= IN_CHANGE;
+ }
+ xp->i_flag &= ~IN_RENAME;
+ }
+ if (dp)
+ vput(fdvp);
+ if (xp)
+ vput(fvp);
+ vrele(ap->a_fvp);
+ return (error);
+
+bad:
+ if (xp)
+ vput(ITOV(xp));
+ vput(ITOV(dp));
+out:
+ if (VOP_LOCK(fvp) == 0) {
+ ip->i_nlink--;
+ ip->i_flag |= IN_CHANGE;
+ vput(fvp);
+ } else
+ vrele(fvp);
+ return (error);
+}
+
+/*
+ * A virgin directory (no blushing please).
+ */
+static struct dirtemplate mastertemplate = {
+ 0, 12, DT_DIR, 1, ".",
+ 0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
+};
+static struct odirtemplate omastertemplate = {
+ 0, 12, 1, ".",
+ 0, DIRBLKSIZ - 12, 2, ".."
+};
+
+/*
+ * Mkdir system call
+ */
+int
+ufs_mkdir(ap)
+ struct vop_mkdir_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ register struct vnode *dvp = ap->a_dvp;
+ register struct vattr *vap = ap->a_vap;
+ register struct componentname *cnp = ap->a_cnp;
+ register struct inode *ip, *dp;
+ struct vnode *tvp;
+ struct dirtemplate dirtemplate, *dtp;
+ struct timeval tv;
+ int error, dmode;
+
+#ifdef DIAGNOSTIC
+ if ((cnp->cn_flags & HASBUF) == 0)
+ panic("ufs_mkdir: no name");
+#endif
+ dp = VTOI(dvp);
+ if ((nlink_t)dp->i_nlink >= LINK_MAX) {
+ error = EMLINK;
+ goto out;
+ }
+ dmode = vap->va_mode & 0777;
+ dmode |= IFDIR;
+ /*
+ * Must simulate part of ufs_makeinode here to acquire the inode,
+ * but not have it entered in the parent directory. The entry is
+ * made later after writing "." and ".." entries.
+ */
+ if (error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp))
+ goto out;
+ ip = VTOI(tvp);
+ ip->i_uid = cnp->cn_cred->cr_uid;
+ ip->i_gid = dp->i_gid;
+#ifdef QUOTA
+ if ((error = getinoquota(ip)) ||
+ (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
+ free(cnp->cn_pnbuf, M_NAMEI);
+ VOP_VFREE(tvp, ip->i_number, dmode);
+ vput(tvp);
+ vput(dvp);
+ return (error);
+ }
+#endif
+ ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
+ ip->i_mode = dmode;
+ tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
+ ip->i_nlink = 2;
+ tv = time;
+ error = VOP_UPDATE(tvp, &tv, &tv, 1);
+
+ /*
+ * Bump link count in parent directory
+ * to reflect work done below. Should
+ * be done before reference is created
+ * so reparation is possible if we crash.
+ */
+ dp->i_nlink++;
+ dp->i_flag |= IN_CHANGE;
+ if (error = VOP_UPDATE(dvp, &tv, &tv, 1))
+ goto bad;
+
+ /* Initialize directory with "." and ".." from static template. */
+ if (dvp->v_mount->mnt_maxsymlinklen > 0)
+ dtp = &mastertemplate;
+ else
+ dtp = (struct dirtemplate *)&omastertemplate;
+ dirtemplate = *dtp;
+ dirtemplate.dot_ino = ip->i_number;
+ dirtemplate.dotdot_ino = dp->i_number;
+ error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
+ sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, (struct proc *)0);
+ if (error) {
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ goto bad;
+ }
+ if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
+ panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */
+ else {
+ ip->i_size = DIRBLKSIZ;
+ ip->i_flag |= IN_CHANGE;
+ }
+
+ /* Directory set up, now install it's entry in the parent directory. */
+ if (error = ufs_direnter(ip, dvp, cnp)) {
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ }
+bad:
+ /*
+ * No need to do an explicit VOP_TRUNCATE here, vrele will do this
+ * for us because we set the link count to 0.
+ */
+ if (error) {
+ ip->i_nlink = 0;
+ ip->i_flag |= IN_CHANGE;
+ vput(tvp);
+ } else
+ *ap->a_vpp = tvp;
+out:
+ FREE(cnp->cn_pnbuf, M_NAMEI);
+ vput(dvp);
+ return (error);
+}
+
+/*
+ * Rmdir system call.
+ */
+int
+ufs_rmdir(ap)
+ struct vop_rmdir_args /* {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct vnode *dvp = ap->a_dvp;
+ register struct componentname *cnp = ap->a_cnp;
+ register struct inode *ip, *dp;
+ int error;
+
+ ip = VTOI(vp);
+ dp = VTOI(dvp);
+ /*
+ * No rmdir "." please.
+ */
+ if (dp == ip) {
+ vrele(dvp);
+ vput(vp);
+ return (EINVAL);
+ }
+ /*
+ * Verify the directory is empty (and valid).
+ * (Rmdir ".." won't be valid since
+ * ".." will contain a reference to
+ * the current directory and thus be
+ * non-empty.)
+ */
+ error = 0;
+ if (ip->i_nlink != 2 ||
+ !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) {
+ error = ENOTEMPTY;
+ goto out;
+ }
+ if ((dp->i_flags & APPEND) || (ip->i_flags & (IMMUTABLE | APPEND))) {
+ error = EPERM;
+ goto out;
+ }
+ /*
+ * Delete reference to directory before purging
+ * inode. If we crash in between, the directory
+ * will be reattached to lost+found,
+ */
+ if (error = ufs_dirremove(dvp, cnp))
+ goto out;
+ dp->i_nlink--;
+ dp->i_flag |= IN_CHANGE;
+ cache_purge(dvp);
+ vput(dvp);
+ dvp = NULL;
+ /*
+ * Truncate inode. The only stuff left
+ * in the directory is "." and "..". The
+ * "." reference is inconsequential since
+ * we're quashing it. The ".." reference
+ * has already been adjusted above. We've
+ * removed the "." reference and the reference
+ * in the parent directory, but there may be
+ * other hard links so decrement by 2 and
+ * worry about them later.
+ */
+ ip->i_nlink -= 2;
+ error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred,
+ cnp->cn_proc);
+ cache_purge(ITOV(ip));
+out:
+ if (dvp)
+ vput(dvp);
+ vput(vp);
+ return (error);
+}
+
+/*
+ * symlink -- make a symbolic link
+ */
+int
+ufs_symlink(ap)
+ struct vop_symlink_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ char *a_target;
+ } */ *ap;
+{
+ register struct vnode *vp, **vpp = ap->a_vpp;
+ register struct inode *ip;
+ int len, error;
+
+ if (error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
+ vpp, ap->a_cnp))
+ return (error);
+ vp = *vpp;
+ len = strlen(ap->a_target);
+ if (len < vp->v_mount->mnt_maxsymlinklen) {
+ ip = VTOI(vp);
+ bcopy(ap->a_target, (char *)ip->i_shortlink, len);
+ ip->i_size = len;
+ ip->i_flag |= IN_CHANGE | IN_UPDATE;
+ } else
+ error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0,
+ (struct proc *)0);
+ vput(vp);
+ return (error);
+}
+
+/*
+ * Vnode op for reading directories.
+ *
+ * The routine below assumes that the on-disk format of a directory
+ * is the same as that defined by <sys/dirent.h>. If the on-disk
+ * format changes, then it will be necessary to do a conversion
+ * from the on-disk format that read returns to the format defined
+ * by <sys/dirent.h>.
+ */
+int
+ufs_readdir(ap)
+ struct vop_readdir_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ struct ucred *a_cred;
+ int *a_eofflag;
+ u_long *a_cookies;
+ int ncookies;
+ } */ *ap;
+{
+ register struct uio *uio = ap->a_uio;
+ int error;
+ size_t count, lost;
+ off_t off = uio->uio_offset;
+
+ count = uio->uio_resid;
+ /* Make sure we don't return partial entries. */
+ count -= (uio->uio_offset + count) & (DIRBLKSIZ -1);
+ if (count <= 0)
+ return (EINVAL);
+ lost = uio->uio_resid - count;
+ uio->uio_resid = count;
+ uio->uio_iov->iov_len = count;
+# if (BYTE_ORDER == LITTLE_ENDIAN)
+ if (ap->a_vp->v_mount->mnt_maxsymlinklen > 0) {
+ error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
+ } else {
+ struct dirent *dp, *edp;
+ struct uio auio;
+ struct iovec aiov;
+ caddr_t dirbuf;
+ int readcnt;
+ u_char tmp;
+
+ auio = *uio;
+ auio.uio_iov = &aiov;
+ auio.uio_iovcnt = 1;
+ auio.uio_segflg = UIO_SYSSPACE;
+ aiov.iov_len = count;
+ MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK);
+ aiov.iov_base = dirbuf;
+ error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred);
+ if (error == 0) {
+ readcnt = count - auio.uio_resid;
+ edp = (struct dirent *)&dirbuf[readcnt];
+ for (dp = (struct dirent *)dirbuf; dp < edp; ) {
+ tmp = dp->d_namlen;
+ dp->d_namlen = dp->d_type;
+ dp->d_type = tmp;
+ if (dp->d_reclen > 0) {
+ dp = (struct dirent *)
+ ((char *)dp + dp->d_reclen);
+ } else {
+ error = EIO;
+ break;
+ }
+ }
+ if (dp >= edp)
+ error = uiomove(dirbuf, readcnt, uio);
+ }
+ FREE(dirbuf, M_TEMP);
+ }
+# else
+ error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
+# endif
+ if (!error && ap->a_ncookies) {
+ register struct dirent *dp;
+ register u_long *cookies = ap->a_cookies;
+ register int ncookies = ap->a_ncookies;
+
+ /*
+ * Only the NFS server uses cookies, and it loads the
+ * directory block into system space, so we can just look at
+ * it directly.
+ */
+ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
+ panic("ufs_readdir: lost in space");
+ dp = (struct dirent *)
+ (uio->uio_iov->iov_base - (uio->uio_offset - off));
+ while (ncookies-- && off < uio->uio_offset) {
+ if (dp->d_reclen == 0)
+ break;
+ off += dp->d_reclen;
+ *(cookies++) = off;
+ dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
+ }
+ lost += uio->uio_offset - off;
+ uio->uio_offset = off;
+ }
+ uio->uio_resid += lost;
+ *ap->a_eofflag = VTOI(ap->a_vp)->i_size <= uio->uio_offset;
+ return (error);
+}
+
+/*
+ * Return target name of a symbolic link
+ */
+int
+ufs_readlink(ap)
+ struct vop_readlink_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ int isize;
+
+ isize = ip->i_size;
+ if (isize < vp->v_mount->mnt_maxsymlinklen ||
+ (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_din.di_blocks == 0)) {
+ uiomove((char *)ip->i_shortlink, isize, ap->a_uio);
+ return (0);
+ }
+ return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
+}
+
+/*
+ * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually
+ * done. If a buffer has been saved in anticipation of a CREATE, delete it.
+ */
+/* ARGSUSED */
+int
+ufs_abortop(ap)
+ struct vop_abortop_args /* {
+ struct vnode *a_dvp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
+ FREE(ap->a_cnp->cn_pnbuf, M_NAMEI);
+ return (0);
+}
+
+/*
+ * Lock an inode. If its already locked, set the WANT bit and sleep.
+ */
+int
+ufs_lock(ap)
+ struct vop_lock_args /* {
+ struct vnode *a_vp;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip;
+ struct proc *p = curproc; /* XXX */
+
+start:
+ while (vp->v_flag & VXLOCK) {
+ vp->v_flag |= VXWANT;
+ sleep((caddr_t)vp, PINOD);
+ }
+ if (vp->v_tag == VT_NON)
+ return (ENOENT);
+ ip = VTOI(vp);
+ if (ip->i_flag & IN_LOCKED) {
+ ip->i_flag |= IN_WANTED;
+#ifdef DIAGNOSTIC
+ if (p) {
+ if (p->p_pid == ip->i_lockholder)
+ panic("locking against myself");
+ ip->i_lockwaiter = p->p_pid;
+ } else
+ ip->i_lockwaiter = -1;
+#endif
+ (void) sleep((caddr_t)ip, PINOD);
+ goto start;
+ }
+#ifdef DIAGNOSTIC
+ ip->i_lockwaiter = 0;
+ if (ip->i_lockholder != 0)
+ panic("lockholder (%d) != 0", ip->i_lockholder);
+ if (p && p->p_pid == 0)
+ printf("locking by process 0\n");
+ if (p)
+ ip->i_lockholder = p->p_pid;
+ else
+ ip->i_lockholder = -1;
+#endif
+ ip->i_flag |= IN_LOCKED;
+ return (0);
+}
+
+/*
+ * Unlock an inode. If WANT bit is on, wakeup.
+ */
+int lockcount = 90;
+int
+ufs_unlock(ap)
+ struct vop_unlock_args /* {
+ struct vnode *a_vp;
+ } */ *ap;
+{
+ register struct inode *ip = VTOI(ap->a_vp);
+ struct proc *p = curproc; /* XXX */
+
+#ifdef DIAGNOSTIC
+ if ((ip->i_flag & IN_LOCKED) == 0) {
+ vprint("ufs_unlock: unlocked inode", ap->a_vp);
+ panic("ufs_unlock NOT LOCKED");
+ }
+ if (p && p->p_pid != ip->i_lockholder && p->p_pid > -1 &&
+ ip->i_lockholder > -1 && lockcount++ < 100)
+ panic("unlocker (%d) != lock holder (%d)",
+ p->p_pid, ip->i_lockholder);
+ ip->i_lockholder = 0;
+#endif
+ ip->i_flag &= ~IN_LOCKED;
+ if (ip->i_flag & IN_WANTED) {
+ ip->i_flag &= ~IN_WANTED;
+ wakeup((caddr_t)ip);
+ }
+ return (0);
+}
+
+/*
+ * Check for a locked inode.
+ */
+int
+ufs_islocked(ap)
+ struct vop_islocked_args /* {
+ struct vnode *a_vp;
+ } */ *ap;
+{
+
+ if (VTOI(ap->a_vp)->i_flag & IN_LOCKED)
+ return (1);
+ return (0);
+}
+
+/*
+ * Calculate the logical to physical mapping if not done already,
+ * then call the device strategy routine.
+ */
+int
+ufs_strategy(ap)
+ struct vop_strategy_args /* {
+ struct buf *a_bp;
+ } */ *ap;
+{
+ register struct buf *bp = ap->a_bp;
+ register struct vnode *vp = bp->b_vp;
+ register struct inode *ip;
+ int error;
+
+ ip = VTOI(vp);
+ if (vp->v_type == VBLK || vp->v_type == VCHR)
+ panic("ufs_strategy: spec");
+ if (bp->b_blkno == bp->b_lblkno) {
+ if (error =
+ VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL)) {
+ bp->b_error = error;
+ bp->b_flags |= B_ERROR;
+ biodone(bp);
+ return (error);
+ }
+ if ((long)bp->b_blkno == -1)
+ clrbuf(bp);
+ }
+ if ((long)bp->b_blkno == -1) {
+ biodone(bp);
+ return (0);
+ }
+ vp = ip->i_devvp;
+ bp->b_dev = vp->v_rdev;
+ VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
+ return (0);
+}
+
+/*
+ * Print out the contents of an inode.
+ */
+int
+ufs_print(ap)
+ struct vop_print_args /* {
+ struct vnode *a_vp;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+
+ printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number,
+ major(ip->i_dev), minor(ip->i_dev));
+#ifdef FIFO
+ if (vp->v_type == VFIFO)
+ fifo_printinfo(vp);
+#endif /* FIFO */
+ printf("%s\n", (ip->i_flag & IN_LOCKED) ? " (LOCKED)" : "");
+ if (ip->i_lockholder == 0)
+ return (0);
+ printf("\towner pid %d", ip->i_lockholder);
+ if (ip->i_lockwaiter)
+ printf(" waiting pid %d", ip->i_lockwaiter);
+ printf("\n");
+ return (0);
+}
+
+/*
+ * Read wrapper for special devices.
+ */
+int
+ufsspec_read(ap)
+ struct vop_read_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+
+ /*
+ * Set access flag.
+ */
+ VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
+ return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap));
+}
+
+/*
+ * Write wrapper for special devices.
+ */
+int
+ufsspec_write(ap)
+ struct vop_write_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+
+ /*
+ * Set update and change flags.
+ */
+ VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
+ return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap));
+}
+
+/*
+ * Close wrapper for special devices.
+ *
+ * Update the times on the inode then do device close.
+ */
+int
+ufsspec_close(ap)
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct inode *ip = VTOI(ap->a_vp);
+
+ if (ap->a_vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED))
+ ITIMES(ip, &time, &time);
+ return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap));
+}
+
+#ifdef FIFO
+/*
+ * Read wrapper for fifo's
+ */
+int
+ufsfifo_read(ap)
+ struct vop_read_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+ extern int (**fifo_vnodeop_p)();
+
+ /*
+ * Set access flag.
+ */
+ VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
+ return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap));
+}
+
+/*
+ * Write wrapper for fifo's.
+ */
+int
+ufsfifo_write(ap)
+ struct vop_write_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap;
+{
+ extern int (**fifo_vnodeop_p)();
+
+ /*
+ * Set update and change flags.
+ */
+ VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
+ return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap));
+}
+
+/*
+ * Close wrapper for fifo's.
+ *
+ * Update the times on the inode then do device close.
+ */
+ufsfifo_close(ap)
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ extern int (**fifo_vnodeop_p)();
+ register struct inode *ip = VTOI(ap->a_vp);
+
+ if (ap->a_vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED))
+ ITIMES(ip, &time, &time);
+ return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap));
+}
+#endif /* FIFO */
+
+/*
+ * Return POSIX pathconf information applicable to ufs filesystems.
+ */
+ufs_pathconf(ap)
+ struct vop_pathconf_args /* {
+ struct vnode *a_vp;
+ int a_name;
+ int *a_retval;
+ } */ *ap;
+{
+
+ switch (ap->a_name) {
+ case _PC_LINK_MAX:
+ *ap->a_retval = LINK_MAX;
+ return (0);
+ case _PC_NAME_MAX:
+ *ap->a_retval = NAME_MAX;
+ return (0);
+ case _PC_PATH_MAX:
+ *ap->a_retval = PATH_MAX;
+ return (0);
+ case _PC_PIPE_BUF:
+ *ap->a_retval = PIPE_BUF;
+ return (0);
+ case _PC_CHOWN_RESTRICTED:
+ *ap->a_retval = 1;
+ return (0);
+ case _PC_NO_TRUNC:
+ *ap->a_retval = 1;
+ return (0);
+ default:
+ return (EINVAL);
+ }
+ /* NOTREACHED */
+}
+
+/*
+ * Advisory record locking support
+ */
+int
+ufs_advlock(ap)
+ struct vop_advlock_args /* {
+ struct vnode *a_vp;
+ caddr_t a_id;
+ int a_op;
+ struct flock *a_fl;
+ int a_flags;
+ } */ *ap;
+{
+ register struct inode *ip = VTOI(ap->a_vp);
+
+ return (lf_advlock(&ip->i_lockf, ip->i_size, ap->a_id, ap->a_op,
+ ap->a_fl, ap->a_flags));
+}
+
+/*
+ * Initialize the vnode associated with a new inode, handle aliased
+ * vnodes.
+ */
+int
+ufs_vinit(mntp, specops, fifoops, vpp)
+ struct mount *mntp;
+ int (**specops)();
+ int (**fifoops)();
+ struct vnode **vpp;
+{
+ struct inode *ip;
+ struct vnode *vp, *nvp;
+
+ vp = *vpp;
+ ip = VTOI(vp);
+ switch(vp->v_type = IFTOVT(ip->i_mode)) {
+ case VCHR:
+ case VBLK:
+ vp->v_op = specops;
+ if (nvp = checkalias(vp, ip->i_rdev, mntp)) {
+ /*
+ * Discard unneeded vnode, but save its inode.
+ */
+ ufs_ihashrem(ip);
+ VOP_UNLOCK(vp);
+ nvp->v_data = vp->v_data;
+ vp->v_data = NULL;
+ vp->v_op = spec_vnodeop_p;
+ vrele(vp);
+ vgone(vp);
+ /*
+ * Reinitialize aliased inode.
+ */
+ vp = nvp;
+ ip->i_vnode = vp;
+ ufs_ihashins(ip);
+ }
+ break;
+ case VFIFO:
+#ifdef FIFO
+ vp->v_op = fifoops;
+ break;
+#else
+ return (EOPNOTSUPP);
+#endif
+ }
+ if (ip->i_number == ROOTINO)
+ vp->v_flag |= VROOT;
+ /*
+ * Initialize modrev times
+ */
+ SETHIGH(ip->i_modrev, mono_time.tv_sec);
+ SETLOW(ip->i_modrev, mono_time.tv_usec * 4294);
+ *vpp = vp;
+ return (0);
+}
+
+/*
+ * Allocate a new inode.
+ */
+int
+ufs_makeinode(mode, dvp, vpp, cnp)
+ int mode;
+ struct vnode *dvp;
+ struct vnode **vpp;
+ struct componentname *cnp;
+{
+ register struct inode *ip, *pdir;
+ struct timeval tv;
+ struct vnode *tvp;
+ int error;
+
+ pdir = VTOI(dvp);
+#ifdef DIAGNOSTIC
+ if ((cnp->cn_flags & HASBUF) == 0)
+ panic("ufs_makeinode: no name");
+#endif
+ *vpp = NULL;
+ if ((mode & IFMT) == 0)
+ mode |= IFREG;
+
+ if (error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) {
+ free(cnp->cn_pnbuf, M_NAMEI);
+ vput(dvp);
+ return (error);
+ }
+ ip = VTOI(tvp);
+ ip->i_gid = pdir->i_gid;
+ if ((mode & IFMT) == IFLNK)
+ ip->i_uid = pdir->i_uid;
+ else
+ ip->i_uid = cnp->cn_cred->cr_uid;
+#ifdef QUOTA
+ if ((error = getinoquota(ip)) ||
+ (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
+ free(cnp->cn_pnbuf, M_NAMEI);
+ VOP_VFREE(tvp, ip->i_number, mode);
+ vput(tvp);
+ vput(dvp);
+ return (error);
+ }
+#endif
+ ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
+ ip->i_mode = mode;
+ tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
+ ip->i_nlink = 1;
+ if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
+ suser(cnp->cn_cred, NULL))
+ ip->i_mode &= ~ISGID;
+
+ /*
+ * Make sure inode goes to disk before directory entry.
+ */
+ tv = time;
+ if (error = VOP_UPDATE(tvp, &tv, &tv, 1))
+ goto bad;
+ if (error = ufs_direnter(ip, dvp, cnp))
+ goto bad;
+ if ((cnp->cn_flags & SAVESTART) == 0)
+ FREE(cnp->cn_pnbuf, M_NAMEI);
+ vput(dvp);
+ *vpp = tvp;
+ return (0);
+
+bad:
+ /*
+ * Write error occurred trying to update the inode
+ * or the directory so must deallocate the inode.
+ */
+ free(cnp->cn_pnbuf, M_NAMEI);
+ vput(dvp);
+ ip->i_nlink = 0;
+ ip->i_flag |= IN_CHANGE;
+ vput(tvp);
+ return (error);
+}

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