sys/vfs/smbfs/smbfs_subr.c

   1 /*
   2  * Copyright (c) 2000-2001, Boris Popov
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *    This product includes software developed by Boris Popov.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/sys/fs/smbfs/smbfs_subr.c,v 1.1.2.2 2003/01/17 08:20:26 tjr Exp $
  33  * $DragonFly: src/sys/vfs/smbfs/smbfs_subr.c,v 1.4 2003/08/07 21:54:36 dillon Exp $
  34  */
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/malloc.h>
  39 #include <machine/clock.h>
  40 #include <sys/time.h>
  41 #include <sys/vnode.h>
  42 #include <sys/sysctl.h>
  43 #include <sys/iconv.h>
  44
  45 #include <netproto/smb/smb.h>
  46 #include <netproto/smb/smb_conn.h>
  47 #include <netproto/smb/smb_subr.h>
  48 #include <netproto/smb/smb_rq.h>
  49 #include <netproto/smb/smb_dev.h>
  50
  51 #include "smbfs.h"
  52 #include "smbfs_node.h"
  53 #include "smbfs_subr.h"
  54
  55 MALLOC_DEFINE(M_SMBFSDATA, "SMBFS data", "SMBFS private data");
  56
  57 /*
  58  * Time & date conversion routines taken from msdosfs. Although leap
  59  * year calculation is bogus, it's sufficient before 2100 :)
  60  */
  61 /*
  62  * This is the format of the contents of the deTime field in the direntry
  63  * structure.
  64  * We don't use bitfields because we don't know how compilers for
  65  * arbitrary machines will lay them out.
  66  */
  67 #define DT_2SECONDS_MASK        0x1F    /* seconds divided by 2 */
  68 #define DT_2SECONDS_SHIFT       0
  69 #define DT_MINUTES_MASK         0x7E0   /* minutes */
  70 #define DT_MINUTES_SHIFT        5
  71 #define DT_HOURS_MASK           0xF800  /* hours */
  72 #define DT_HOURS_SHIFT          11
  73
  74 /*
  75  * This is the format of the contents of the deDate field in the direntry
  76  * structure.
  77  */
  78 #define DD_DAY_MASK             0x1F    /* day of month */
  79 #define DD_DAY_SHIFT            0
  80 #define DD_MONTH_MASK           0x1E0   /* month */
  81 #define DD_MONTH_SHIFT          5
  82 #define DD_YEAR_MASK            0xFE00  /* year - 1980 */
  83 #define DD_YEAR_SHIFT           9
  84 /*
  85  * Total number of days that have passed for each month in a regular year.
  86  */
  87 static u_short regyear[] = {
  88         31, 59, 90, 120, 151, 181,
  89         212, 243, 273, 304, 334, 365
  90 };
  91
  92 /*
  93  * Total number of days that have passed for each month in a leap year.
  94  */
  95 static u_short leapyear[] = {
  96         31, 60, 91, 121, 152, 182,
  97         213, 244, 274, 305, 335, 366
  98 };
  99
 100 /*
 101  * Variables used to remember parts of the last time conversion.  Maybe we
 102  * can avoid a full conversion.
 103  */
 104 static u_long  lasttime;
 105 static u_long  lastday;
 106 static u_short lastddate;
 107 static u_short lastdtime;
 108
 109 void
 110 smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds)
 111 {
 112         *seconds = tsp->tv_sec - tzoff * 60 /*- tz.tz_minuteswest * 60 -
 113             (wall_cmos_clock ? adjkerntz : 0)*/;
 114 }
 115
 116 void
 117 smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp)
 118 {
 119         tsp->tv_sec = seconds + tzoff * 60;
 120             /*+ tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)*/;
 121 }
 122
 123 /*
 124  * Number of seconds between 1970 and 1601 year
 125  */
 126 int64_t DIFF1970TO1601 = 11644473600ULL;
 127
 128 /*
 129  * Time from server comes as UTC, so no need to use tz
 130  */
 131 void
 132 smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp)
 133 {
 134         smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp);
 135 }
 136
 137 void
 138 smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec)
 139 {
 140         u_long seconds;
 141
 142         smb_time_local2server(tsp, 0, &seconds);
 143         *nsec = (((int64_t)(seconds) & ~1) + DIFF1970TO1601) * (int64_t)10000000;
 144 }
 145
 146 void
 147 smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp,
 148         u_int16_t *dtp, u_int8_t *dhp)
 149 {
 150         u_long t, days, year, month, inc;
 151         u_short *months;
 152
 153         /*
 154          * If the time from the last conversion is the same as now, then
 155          * skip the computations and use the saved result.
 156          */
 157         smb_time_local2server(tsp, tzoff, &t);
 158         t &= ~1;
 159         if (lasttime != t) {
 160                 lasttime = t;
 161                 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
 162                     + (((t / 60) % 60) << DT_MINUTES_SHIFT)
 163                     + (((t / 3600) % 24) << DT_HOURS_SHIFT);
 164
 165                 /*
 166                  * If the number of days since 1970 is the same as the last
 167                  * time we did the computation then skip all this leap year
 168                  * and month stuff.
 169                  */
 170                 days = t / (24 * 60 * 60);
 171                 if (days != lastday) {
 172                         lastday = days;
 173                         for (year = 1970;; year++) {
 174                                 inc = year & 0x03 ? 365 : 366;
 175                                 if (days < inc)
 176                                         break;
 177                                 days -= inc;
 178                         }
 179                         months = year & 0x03 ? regyear : leapyear;
 180                         for (month = 0; days >= months[month]; month++)
 181                                 ;
 182                         if (month > 0)
 183                                 days -= months[month - 1];
 184                         lastddate = ((days + 1) << DD_DAY_SHIFT)
 185                             + ((month + 1) << DD_MONTH_SHIFT);
 186                         /*
 187                          * Remember dos's idea of time is relative to 1980.
 188                          * unix's is relative to 1970.  If somehow we get a
 189                          * time before 1980 then don't give totally crazy
 190                          * results.
 191                          */
 192                         if (year > 1980)
 193                                 lastddate += (year - 1980) << DD_YEAR_SHIFT;
 194                 }
 195         }
 196         if (dtp)
 197                 *dtp = lastdtime;
 198         if (dhp)
 199                 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
 200
 201         *ddp = lastddate;
 202 }
 203
 204 /*
 205  * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
 206  * interval there were 8 regular years and 2 leap years.
 207  */
 208 #define SECONDSTO1980   (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
 209
 210 static u_short lastdosdate;
 211 static u_long  lastseconds;
 212
 213 void
 214 smb_dos2unixtime(u_int dd, u_int dt, u_int dh, int tzoff,
 215         struct timespec *tsp)
 216 {
 217         u_long seconds;
 218         u_long month;
 219         u_long year;
 220         u_long days;
 221         u_short *months;
 222
 223         if (dd == 0) {
 224                 tsp->tv_sec = 0;
 225                 tsp->tv_nsec = 0;
 226                 return;
 227         }
 228         seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
 229             + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
 230             + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
 231             + dh / 100;
 232         /*
 233          * If the year, month, and day from the last conversion are the
 234          * same then use the saved value.
 235          */
 236         if (lastdosdate != dd) {
 237                 lastdosdate = dd;
 238                 days = 0;
 239                 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
 240                 days = year * 365;
 241                 days += year / 4 + 1;   /* add in leap days */
 242                 if ((year & 0x03) == 0)
 243                         days--;         /* if year is a leap year */
 244                 months = year & 0x03 ? regyear : leapyear;
 245                 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
 246                 if (month < 1 || month > 12) {
 247                         month = 1;
 248                 }
 249                 if (month > 1)
 250                         days += months[month - 2];
 251                 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
 252                 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
 253         }
 254         smb_time_server2local(seconds + lastseconds, tzoff, tsp);
 255         tsp->tv_nsec = (dh % 100) * 10000000;
 256 }
 257
 258 static int
 259 smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np,
 260         int caseopt)
 261 {
 262         struct smbmount *smp= np->n_mount;
 263         struct smbnode **npp = smp->sm_npstack;
 264         int i, error = 0;
 265
 266 /*      simple_lock(&smp->sm_npslock);*/
 267         i = 0;
 268         while (np->n_parent) {
 269                 if (i++ == SMBFS_MAXPATHCOMP) {
 270 /*                      simple_unlock(&smp->sm_npslock);*/
 271                         return ENAMETOOLONG;
 272                 }
 273                 *npp++ = np;
 274                 np = VTOSMB(np->n_parent);
 275         }
 276 /*      if (i == 0)
 277                 return smb_put_dmem(mbp, vcp, "\\", 2, caseopt);*/
 278         while (i--) {
 279                 np = *--npp;
 280                 error = mb_put_uint8(mbp, '\\');
 281                 if (error)
 282                         break;
 283                 error = smb_put_dmem(mbp, vcp, np->n_name, np->n_nmlen, caseopt);
 284                 if (error)
 285                         break;
 286         }
 287 /*      simple_unlock(&smp->sm_npslock);*/
 288         return error;
 289 }
 290
 291 int
 292 smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
 293         const char *name, int nmlen)
 294 {
 295         int caseopt = SMB_CS_NONE;
 296         int error;
 297
 298         if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
 299                 caseopt |= SMB_CS_UPPER;
 300         if (dnp != NULL) {
 301                 error = smb_fphelp(mbp, vcp, dnp, caseopt);
 302                 if (error)
 303                         return error;
 304         }
 305         if (name) {
 306                 error = mb_put_uint8(mbp, '\\');
 307                 if (error)
 308                         return error;
 309                 error = smb_put_dmem(mbp, vcp, name, nmlen, caseopt);
 310                 if (error)
 311                         return error;
 312         }
 313         error = mb_put_uint8(mbp, 0);
 314         return error;
 315 }
 316
 317 int
 318 smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int nmlen, int caseopt)
 319 {
 320 /*      if (caseopt & SMB_CS_UPPER)
 321                 iconv_convmem(vcp->vc_toupper, name, name, nmlen);
 322         else if (caseopt & SMB_CS_LOWER)
 323                 iconv_convmem(vcp->vc_tolower, name, name, nmlen);*/
 324         if (vcp->vc_tolocal)
 325                 iconv_convmem(vcp->vc_tolocal, name, name, nmlen);
 326         return 0;
 327 }