smbfs_subr.c

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    1 /*      $NetBSD: smbfs_subr.c,v 1.8 2003/02/25 09:09:31 jdolecek Exp $  */
    2 
    3 /*
    4  * Copyright (c) 2000-2001, Boris Popov
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *    This product includes software developed by Boris Popov.
   18  * 4. Neither the name of the author nor the names of any co-contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  * FreeBSD: src/sys/fs/smbfs/smbfs_subr.c,v 1.1 2001/04/10 07:59:05 bp Exp
   35  */
   36 
   37 #include <sys/cdefs.h>
   38 __KERNEL_RCSID(0, "$NetBSD: smbfs_subr.c,v 1.8 2003/02/25 09:09:31 jdolecek Exp $");
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/malloc.h>
   44 #include <sys/mount.h>
   45 #include <sys/time.h>
   46 #include <sys/vnode.h>
   47 #include <sys/sysctl.h>
   48 #include <netsmb/iconv.h>
   49 
   50 #include <netsmb/smb.h>
   51 #include <netsmb/smb_conn.h>
   52 #include <netsmb/smb_subr.h>
   53 #include <netsmb/smb_rq.h>
   54 #include <netsmb/smb_dev.h>
   55 
   56 #include <fs/smbfs/smbfs.h>
   57 #include <fs/smbfs/smbfs_node.h>
   58 #include <fs/smbfs/smbfs_subr.h>
   59 
   60 MALLOC_DEFINE(M_SMBFSDATA, "SMBFS data", "SMBFS private data");
   61 
   62 /* 
   63  * Time & date conversion routines taken from msdosfs. Although leap
   64  * year calculation is bogus, it's sufficient before 2100 :)
   65  */
   66 /*
   67  * This is the format of the contents of the deTime field in the direntry
   68  * structure.
   69  * We don't use bitfields because we don't know how compilers for
   70  * arbitrary machines will lay them out.
   71  */
   72 #define DT_2SECONDS_MASK        0x1F    /* seconds divided by 2 */
   73 #define DT_2SECONDS_SHIFT       0
   74 #define DT_MINUTES_MASK         0x7E0   /* minutes */
   75 #define DT_MINUTES_SHIFT        5
   76 #define DT_HOURS_MASK           0xF800  /* hours */
   77 #define DT_HOURS_SHIFT          11
   78 
   79 /*
   80  * This is the format of the contents of the deDate field in the direntry
   81  * structure.
   82  */
   83 #define DD_DAY_MASK             0x1F    /* day of month */
   84 #define DD_DAY_SHIFT            0
   85 #define DD_MONTH_MASK           0x1E0   /* month */
   86 #define DD_MONTH_SHIFT          5
   87 #define DD_YEAR_MASK            0xFE00  /* year - 1980 */
   88 #define DD_YEAR_SHIFT           9
   89 /*
   90  * Total number of days that have passed for each month in a regular year.
   91  */
   92 static const u_short regyear[] = {
   93         31, 59, 90, 120, 151, 181,
   94         212, 243, 273, 304, 334, 365
   95 };
   96 
   97 /*
   98  * Total number of days that have passed for each month in a leap year.
   99  */
  100 static const u_short leapyear[] = {
  101         31, 60, 91, 121, 152, 182,
  102         213, 244, 274, 305, 335, 366
  103 };
  104 
  105 /*
  106  * Variables used to remember parts of the last time conversion.  Maybe we
  107  * can avoid a full conversion.
  108  */
  109 static u_long  lasttime;
  110 static u_long  lastday;
  111 static u_short lastddate;
  112 static u_short lastdtime;
  113 
  114 void
  115 smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds)
  116 {
  117         *seconds = tsp->tv_sec - tzoff * 60 /*- tz.tz_minuteswest * 60 -
  118             (wall_cmos_clock ? adjkerntz : 0)*/;
  119 }
  120 
  121 void
  122 smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp)
  123 {
  124         tsp->tv_sec = seconds + tzoff * 60;
  125             /*+ tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)*/;
  126 }
  127 
  128 /*
  129  * Number of seconds between 1970 and 1601 year
  130  */
  131 static const int64_t DIFF1970TO1601 = 11644473600ULL;
  132 
  133 /*
  134  * Time from server comes as UTC, so no need to use tz
  135  */
  136 void
  137 smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp)
  138 {
  139         smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp);
  140 }
  141 
  142 void
  143 smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec)
  144 {
  145         u_long seconds;
  146 
  147         smb_time_local2server(tsp, 0, &seconds);
  148         *nsec = (((int64_t)(seconds) & ~1) + DIFF1970TO1601) * (int64_t)10000000;
  149 }
  150 
  151 void
  152 smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp, 
  153         u_int16_t *dtp, u_int8_t *dhp)
  154 {
  155         u_long t, days, year, month, inc;
  156         const u_short *months;
  157 
  158         /*
  159          * If the time from the last conversion is the same as now, then
  160          * skip the computations and use the saved result.
  161          */
  162         smb_time_local2server(tsp, tzoff, &t);
  163         t &= ~1;
  164         if (lasttime != t) {
  165                 lasttime = t;
  166                 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
  167                     + (((t / 60) % 60) << DT_MINUTES_SHIFT)
  168                     + (((t / 3600) % 24) << DT_HOURS_SHIFT);
  169 
  170                 /*
  171                  * If the number of days since 1970 is the same as the last
  172                  * time we did the computation then skip all this leap year
  173                  * and month stuff.
  174                  */
  175                 days = t / (24 * 60 * 60);
  176                 if (days != lastday) {
  177                         lastday = days;
  178                         for (year = 1970;; year++) {
  179                                 inc = year & 0x03 ? 365 : 366;
  180                                 if (days < inc)
  181                                         break;
  182                                 days -= inc;
  183                         }
  184                         months = year & 0x03 ? regyear : leapyear;
  185                         for (month = 0; days >= months[month]; month++)
  186                                 ;
  187                         if (month > 0)
  188                                 days -= months[month - 1];
  189                         lastddate = ((days + 1) << DD_DAY_SHIFT)
  190                             + ((month + 1) << DD_MONTH_SHIFT);
  191                         /*
  192                          * Remember dos's idea of time is relative to 1980.
  193                          * unix's is relative to 1970.  If somehow we get a
  194                          * time before 1980 then don't give totally crazy
  195                          * results.
  196                          */
  197                         if (year > 1980)
  198                                 lastddate += (year - 1980) << DD_YEAR_SHIFT;
  199                 }
  200         }
  201         if (dtp)
  202                 *dtp = lastdtime;
  203         if (dhp)
  204                 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
  205 
  206         *ddp = lastddate;
  207 }
  208 
  209 /*
  210  * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
  211  * interval there were 8 regular years and 2 leap years.
  212  */
  213 #define SECONDSTO1980   (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
  214 
  215 static u_short lastdosdate;
  216 static u_long  lastseconds;
  217 
  218 void
  219 smb_dos2unixtime(u_int dd, u_int dt, u_int dh, int tzoff,
  220         struct timespec *tsp)
  221 {
  222         u_long seconds;
  223         u_long month;
  224         u_long year;
  225         u_long days;
  226         const u_short *months;
  227 
  228         if (dd == 0) {
  229                 tsp->tv_sec = 0;
  230                 tsp->tv_nsec = 0;
  231                 return;
  232         }
  233         seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
  234             + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
  235             + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
  236             + dh / 100;
  237         /*
  238          * If the year, month, and day from the last conversion are the
  239          * same then use the saved value.
  240          */
  241         if (lastdosdate != dd) {
  242                 lastdosdate = dd;
  243                 days = 0;
  244                 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
  245                 days = year * 365;
  246                 days += year / 4 + 1;   /* add in leap days */
  247                 if ((year & 0x03) == 0)
  248                         days--;         /* if year is a leap year */
  249                 months = year & 0x03 ? regyear : leapyear;
  250                 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
  251                 if (month < 1 || month > 12) {
  252                         month = 1;
  253                 }
  254                 if (month > 1)
  255                         days += months[month - 2];
  256                 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
  257                 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
  258         }
  259         smb_time_server2local(seconds + lastseconds, tzoff, tsp);
  260         tsp->tv_nsec = (dh % 100) * 10000000;
  261 }
  262 
  263 static int
  264 smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np,
  265         int caseopt)
  266 {
  267         struct smbmount *smp= np->n_mount;
  268         struct smbnode **npp = smp->sm_npstack;
  269         int i, error = 0;
  270 
  271 /*      simple_lock(&smp->sm_npslock);*/
  272         i = 0;
  273         while (np->n_parent) {
  274                 if (i++ == SMBFS_MAXPATHCOMP) {
  275 /*                      simple_unlock(&smp->sm_npslock);*/
  276                         return ENAMETOOLONG;
  277                 }
  278                 *npp++ = np;
  279                 np = np->n_parent;
  280         }
  281         while (i--) {
  282                 np = *--npp;
  283                 error = mb_put_uint8(mbp, '\\');
  284                 if (error)
  285                         break;
  286                 error = smb_put_dmem(mbp, vcp, np->n_name, np->n_nmlen, caseopt);
  287                 if (error)
  288                         break;
  289         }
  290 /*      simple_unlock(&smp->sm_npslock);*/
  291         return error;
  292 }
  293 
  294 int
  295 smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
  296         const char *name, int nmlen)
  297 {
  298         int caseopt = SMB_CS_NONE;
  299         int error;
  300 
  301         if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
  302                 caseopt |= SMB_CS_UPPER;
  303         if (dnp != NULL) {
  304                 error = smb_fphelp(mbp, vcp, dnp, caseopt);
  305                 if (error)
  306                         return error;
  307         }
  308         if (name) {
  309                 error = mb_put_uint8(mbp, '\\');
  310                 if (error)
  311                         return error;
  312                 error = smb_put_dmem(mbp, vcp, name, nmlen, caseopt);
  313                 if (error)
  314                         return error;
  315         }
  316         error = mb_put_uint8(mbp, 0);
  317         return error;
  318 }
  319 
  320 int
  321 smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int nmlen, int caseopt)
  322 {
  323 /*      if (caseopt & SMB_CS_UPPER)
  324                 iconv_convmem(vcp->vc_toupper, name, name, nmlen);
  325         else if (caseopt & SMB_CS_LOWER)
  326                 iconv_convmem(vcp->vc_tolower, name, name, nmlen);*/
  327         if (vcp->vc_tolocal)
  328                 iconv_convmem(vcp->vc_tolocal, name, name, nmlen);
  329         return 0;
  330 }
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FreeBSD/Linux Kernel Cross Reference sys/fs/smbfs/smbfs_subr.c

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sys/fs/smbfs/smbfs_subr.c
