35c5de54e8
in smb_fphelp(): the parent vnode may have already been recycled since we don't hold a reference to it. Fixes a panic when rebooting with mdconfig -t vnode devices referring to vnodes on a smbfs mount.
329 lines
9.0 KiB
C
329 lines
9.0 KiB
C
/*
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* Copyright (c) 2000-2001, Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <machine/clock.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <sys/sysctl.h>
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#include <sys/iconv.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <netsmb/smb_rq.h>
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#include <netsmb/smb_dev.h>
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#include <fs/smbfs/smbfs.h>
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#include <fs/smbfs/smbfs_node.h>
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#include <fs/smbfs/smbfs_subr.h>
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MALLOC_DEFINE(M_SMBFSDATA, "SMBFS data", "SMBFS private data");
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/*
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* Time & date conversion routines taken from msdosfs. Although leap
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* year calculation is bogus, it's sufficient before 2100 :)
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*/
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/*
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* This is the format of the contents of the deTime field in the direntry
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* structure.
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* We don't use bitfields because we don't know how compilers for
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* arbitrary machines will lay them out.
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*/
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#define DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */
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#define DT_2SECONDS_SHIFT 0
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#define DT_MINUTES_MASK 0x7E0 /* minutes */
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#define DT_MINUTES_SHIFT 5
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#define DT_HOURS_MASK 0xF800 /* hours */
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#define DT_HOURS_SHIFT 11
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/*
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* This is the format of the contents of the deDate field in the direntry
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* structure.
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*/
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#define DD_DAY_MASK 0x1F /* day of month */
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#define DD_DAY_SHIFT 0
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#define DD_MONTH_MASK 0x1E0 /* month */
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#define DD_MONTH_SHIFT 5
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#define DD_YEAR_MASK 0xFE00 /* year - 1980 */
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#define DD_YEAR_SHIFT 9
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/*
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* Total number of days that have passed for each month in a regular year.
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*/
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static u_short regyear[] = {
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31, 59, 90, 120, 151, 181,
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212, 243, 273, 304, 334, 365
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};
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/*
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* Total number of days that have passed for each month in a leap year.
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*/
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static u_short leapyear[] = {
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31, 60, 91, 121, 152, 182,
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213, 244, 274, 305, 335, 366
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};
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/*
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* Variables used to remember parts of the last time conversion. Maybe we
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* can avoid a full conversion.
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*/
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static u_long lasttime;
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static u_long lastday;
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static u_short lastddate;
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static u_short lastdtime;
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void
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smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds)
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{
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*seconds = tsp->tv_sec - tzoff * 60 /*- tz_minuteswest * 60 -
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(wall_cmos_clock ? adjkerntz : 0)*/;
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}
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void
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smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp)
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{
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tsp->tv_sec = seconds + tzoff * 60;
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/*+ tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)*/;
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}
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/*
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* Number of seconds between 1970 and 1601 year
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*/
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int64_t DIFF1970TO1601 = 11644473600ULL;
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/*
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* Time from server comes as UTC, so no need to use tz
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*/
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void
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smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp)
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{
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smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp);
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}
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void
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smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec)
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{
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u_long seconds;
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smb_time_local2server(tsp, 0, &seconds);
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*nsec = (((int64_t)(seconds) & ~1) + DIFF1970TO1601) * (int64_t)10000000;
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}
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void
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smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp,
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u_int16_t *dtp, u_int8_t *dhp)
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{
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u_long t, days, year, month, inc;
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u_short *months;
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/*
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* If the time from the last conversion is the same as now, then
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* skip the computations and use the saved result.
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*/
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smb_time_local2server(tsp, tzoff, &t);
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t &= ~1;
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if (lasttime != t) {
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lasttime = t;
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lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
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+ (((t / 60) % 60) << DT_MINUTES_SHIFT)
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+ (((t / 3600) % 24) << DT_HOURS_SHIFT);
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/*
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* If the number of days since 1970 is the same as the last
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* time we did the computation then skip all this leap year
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* and month stuff.
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*/
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days = t / (24 * 60 * 60);
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if (days != lastday) {
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lastday = days;
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for (year = 1970;; year++) {
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inc = year & 0x03 ? 365 : 366;
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if (days < inc)
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break;
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days -= inc;
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}
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months = year & 0x03 ? regyear : leapyear;
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for (month = 0; days >= months[month]; month++)
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;
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if (month > 0)
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days -= months[month - 1];
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lastddate = ((days + 1) << DD_DAY_SHIFT)
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+ ((month + 1) << DD_MONTH_SHIFT);
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/*
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* Remember dos's idea of time is relative to 1980.
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* unix's is relative to 1970. If somehow we get a
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* time before 1980 then don't give totally crazy
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* results.
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*/
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if (year > 1980)
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lastddate += (year - 1980) << DD_YEAR_SHIFT;
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}
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}
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if (dtp)
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*dtp = lastdtime;
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if (dhp)
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*dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
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*ddp = lastddate;
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}
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/*
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* The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
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* interval there were 8 regular years and 2 leap years.
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*/
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#define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
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static u_short lastdosdate;
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static u_long lastseconds;
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void
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smb_dos2unixtime(u_int dd, u_int dt, u_int dh, int tzoff,
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struct timespec *tsp)
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{
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u_long seconds;
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u_long month;
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u_long year;
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u_long days;
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u_short *months;
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if (dd == 0) {
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tsp->tv_sec = 0;
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tsp->tv_nsec = 0;
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return;
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}
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seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
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+ ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
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+ ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
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+ dh / 100;
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/*
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* If the year, month, and day from the last conversion are the
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* same then use the saved value.
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*/
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if (lastdosdate != dd) {
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lastdosdate = dd;
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days = 0;
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year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
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days = year * 365;
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days += year / 4 + 1; /* add in leap days */
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if ((year & 0x03) == 0)
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days--; /* if year is a leap year */
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months = year & 0x03 ? regyear : leapyear;
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month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
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if (month < 1 || month > 12) {
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month = 1;
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}
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if (month > 1)
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days += months[month - 2];
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days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
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lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
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}
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smb_time_server2local(seconds + lastseconds, tzoff, tsp);
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tsp->tv_nsec = (dh % 100) * 10000000;
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}
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static int
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smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np,
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int caseopt)
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{
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struct smbmount *smp= np->n_mount;
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struct smbnode **npp = smp->sm_npstack;
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int i, error = 0;
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/* simple_lock(&smp->sm_npslock);*/
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i = 0;
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while (np->n_parent) {
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if (i++ == SMBFS_MAXPATHCOMP) {
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/* simple_unlock(&smp->sm_npslock);*/
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return ENAMETOOLONG;
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}
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*npp++ = np;
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if ((np->n_flag & NREFPARENT) == 0)
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break;
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np = VTOSMB(np->n_parent);
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}
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/* if (i == 0)
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return smb_put_dmem(mbp, vcp, "\\", 2, caseopt);*/
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while (i--) {
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np = *--npp;
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error = mb_put_uint8(mbp, '\\');
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if (error)
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break;
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error = smb_put_dmem(mbp, vcp, np->n_name, np->n_nmlen, caseopt);
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if (error)
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break;
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}
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/* simple_unlock(&smp->sm_npslock);*/
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return error;
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}
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int
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smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
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const char *name, int nmlen)
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{
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int caseopt = SMB_CS_NONE;
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int error;
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if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
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caseopt |= SMB_CS_UPPER;
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if (dnp != NULL) {
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error = smb_fphelp(mbp, vcp, dnp, caseopt);
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if (error)
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return error;
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}
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if (name) {
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error = mb_put_uint8(mbp, '\\');
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if (error)
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return error;
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error = smb_put_dmem(mbp, vcp, name, nmlen, caseopt);
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if (error)
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return error;
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}
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error = mb_put_uint8(mbp, 0);
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return error;
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}
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int
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smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int nmlen, int caseopt)
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{
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/* if (caseopt & SMB_CS_UPPER)
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iconv_convmem(vcp->vc_toupper, name, name, nmlen);
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else if (caseopt & SMB_CS_LOWER)
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iconv_convmem(vcp->vc_tolower, name, name, nmlen);*/
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if (vcp->vc_tolocal)
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iconv_convmem(vcp->vc_tolocal, name, name, nmlen);
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return 0;
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}
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