proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
[dragonfly.git] / sys / vfs / smbfs / smbfs_subr.c
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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 $
1de703da 33 * $DragonFly: src/sys/vfs/smbfs/smbfs_subr.c,v 1.2 2003/06/17 04:28:33 dillon Exp $
984263bc
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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 <netsmb/smb.h>
46#include <netsmb/smb_conn.h>
47#include <netsmb/smb_subr.h>
48#include <netsmb/smb_rq.h>
49#include <netsmb/smb_dev.h>
50
51#include <fs/smbfs/smbfs.h>
52#include <fs/smbfs/smbfs_node.h>
53#include <fs/smbfs/smbfs_subr.h>
54
55MALLOC_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 */
87static 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 */
95static 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 */
104static u_long lasttime;
105static u_long lastday;
106static u_short lastddate;
107static u_short lastdtime;
108
109void
110smb_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
116void
117smb_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 */
126int64_t DIFF1970TO1601 = 11644473600ULL;
127
128/*
129 * Time from server comes as UTC, so no need to use tz
130 */
131void
132smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp)
133{
134 smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp);
135}
136
137void
138smb_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
146void
147smb_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
210static u_short lastdosdate;
211static u_long lastseconds;
212
213void
214smb_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
258static int
259smb_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
291int
292smbfs_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
317int
318smbfs_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}