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[linux.git] / fs / smbfs / proc.c
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1da177e4
LT		 1/*
2 * proc.c
3 *
4 * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
5 * Copyright (C) 1997 by Volker Lendecke
6 *
7 * Please add a note about your changes to smbfs in the ChangeLog file.
8 */
9
10#include <linux/types.h>
16f7e0fe 11#include <linux/capability.h>
1da177e4
LT		 12#include <linux/errno.h>
13#include <linux/slab.h>
14#include <linux/fs.h>
15#include <linux/file.h>
16#include <linux/stat.h>
17#include <linux/fcntl.h>
18#include <linux/dcache.h>
19#include <linux/dirent.h>
20#include <linux/nls.h>
21#include <linux/smp_lock.h>
22#include <linux/net.h>
23#include <linux/vfs.h>
24#include <linux/smb_fs.h>
25#include <linux/smbno.h>
26#include <linux/smb_mount.h>
27
28#include <net/sock.h>
29
30#include <asm/string.h>
31#include <asm/div64.h>
32
33#include "smb_debug.h"
34#include "proto.h"
35#include "request.h"
36
37
38/* Features. Undefine if they cause problems, this should perhaps be a
39 config option. */
40#define SMBFS_POSIX_UNLINK 1
41
42/* Allow smb_retry to be interrupted. */
43#define SMB_RETRY_INTR
44
45#define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN)
46#define SMB_CMD(packet) (*(packet+8))
47#define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1))
48
49#define SMB_DIRINFO_SIZE 43
50#define SMB_STATUS_SIZE 21
51
52#define SMB_ST_BLKSIZE (PAGE_SIZE)
53#define SMB_ST_BLKSHIFT (PAGE_SHIFT)
54
55static struct smb_ops smb_ops_core;
56static struct smb_ops smb_ops_os2;
57static struct smb_ops smb_ops_win95;
58static struct smb_ops smb_ops_winNT;
59static struct smb_ops smb_ops_unix;
60static struct smb_ops smb_ops_null;
61
62static void
63smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
64static void
65smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
66static int
67smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
68 struct smb_fattr *fattr);
69static int
70smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
71 struct smb_fattr *fattr);
72static int
73smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
74 u16 attr);
75static int
76smb_proc_setattr_ext(struct smb_sb_info *server,
77 struct inode *inode, struct smb_fattr *fattr);
78static int
79smb_proc_query_cifsunix(struct smb_sb_info *server);
80static void
81install_ops(struct smb_ops *dst, struct smb_ops *src);
82
83
84static void
85str_upper(char *name, int len)
86{
87 while (len--)
88 {
89 if (*name >= 'a' && *name <= 'z')
90 *name -= ('a' - 'A');
91 name++;
92 }
93}
94
95#if 0
96static void
97str_lower(char *name, int len)
98{
99 while (len--)
100 {
101 if (*name >= 'A' && *name <= 'Z')
102 *name += ('a' - 'A');
103 name++;
104 }
105}
106#endif
107
108/* reverse a string inline. This is used by the dircache walking routines */
109static void reverse_string(char *buf, int len)
110{
111 char c;
112 char *end = buf+len-1;
113
114 while(buf < end) {
115 c = *buf;
116 *(buf++) = *end;
117 *(end--) = c;
118 }
119}
120
121/* no conversion, just a wrapper for memcpy. */
122static int convert_memcpy(unsigned char *output, int olen,
123 const unsigned char *input, int ilen,
124 struct nls_table *nls_from,
125 struct nls_table *nls_to)
126{
127 if (olen < ilen)
128 return -ENAMETOOLONG;
129 memcpy(output, input, ilen);
130 return ilen;
131}
132
133static inline int write_char(unsigned char ch, char *output, int olen)
134{
135 if (olen < 4)
136 return -ENAMETOOLONG;
137 sprintf(output, ":x%02x", ch);
138 return 4;
139}
140
141static inline int write_unichar(wchar_t ch, char *output, int olen)
142{
143 if (olen < 5)
144 return -ENAMETOOLONG;
145 sprintf(output, ":%04x", ch);
146 return 5;
147}
148
149/* convert from one "codepage" to another (possibly being utf8). */
150static int convert_cp(unsigned char *output, int olen,
151 const unsigned char *input, int ilen,
152 struct nls_table *nls_from,
153 struct nls_table *nls_to)
154{
155 int len = 0;
156 int n;
157 wchar_t ch;
158
159 while (ilen > 0) {
160 /* convert by changing to unicode and back to the new cp */
161 n = nls_from->char2uni(input, ilen, &ch);
162 if (n == -EINVAL) {
163 ilen--;
164 n = write_char(*input++, output, olen);
165 if (n < 0)
166 goto fail;
167 output += n;
168 olen -= n;
169 len += n;
170 continue;
171 } else if (n < 0)
172 goto fail;
173 input += n;
174 ilen -= n;
175
176 n = nls_to->uni2char(ch, output, olen);
177 if (n == -EINVAL)
178 n = write_unichar(ch, output, olen);
179 if (n < 0)
180 goto fail;
181 output += n;
182 olen -= n;
183
184 len += n;
185 }
186 return len;
187fail:
188 return n;
189}
190
191/* ----------------------------------------------------------- */
192
193/*
194 * nls_unicode
195 *
196 * This encodes/decodes little endian unicode format
197 */
198
199static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
200{
201 if (boundlen < 2)
202 return -EINVAL;
203 *out++ = uni & 0xff;
204 *out++ = uni >> 8;
205 return 2;
206}
207
208static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
209{
210 if (boundlen < 2)
211 return -EINVAL;
212 *uni = (rawstring[1] << 8) | rawstring[0];
213 return 2;
214}
215
216static struct nls_table unicode_table = {
217 .charset = "unicode",
218 .uni2char = uni2char,
219 .char2uni = char2uni,
220};
221
222/* ----------------------------------------------------------- */
223
224static int setcodepage(struct nls_table **p, char *name)
225{
226 struct nls_table *nls;
227
228 if (!name || !*name) {
229 nls = NULL;
230 } else if ( (nls = load_nls(name)) == NULL) {
231 printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name);
232 return -EINVAL;
233 }
234
235 /* if already set, unload the previous one. */
236 if (*p && *p != &unicode_table)
237 unload_nls(*p);
238 *p = nls;
239
240 return 0;
241}
242
243/* Handles all changes to codepage settings. */
244int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp)
245{
246 int n = 0;
247
248 smb_lock_server(server);
249
250 /* Don't load any nls_* at all, if no remote is requested */
251 if (!*cp->remote_name)
252 goto out;
253
254 /* local */
255 n = setcodepage(&server->local_nls, cp->local_name);
256 if (n != 0)
257 goto out;
258
259 /* remote */
260 if (!strcmp(cp->remote_name, "unicode")) {
261 server->remote_nls = &unicode_table;
262 } else {
263 n = setcodepage(&server->remote_nls, cp->remote_name);
264 if (n != 0)
265 setcodepage(&server->local_nls, NULL);
266 }
267
268out:
269 if (server->local_nls != NULL && server->remote_nls != NULL)
270 server->ops->convert = convert_cp;
271 else
272 server->ops->convert = convert_memcpy;
273
274 smb_unlock_server(server);
275 return n;
276}
277
278
279/*****************************************************************************/
280/* */
281/* Encoding/Decoding section */
282/* */
283/*****************************************************************************/
284
285static __u8 *
286smb_encode_smb_length(__u8 * p, __u32 len)
287{
288 *p = 0;
289 *(p+1) = 0;
290 *(p+2) = (len & 0xFF00) >> 8;
291 *(p+3) = (len & 0xFF);
292 if (len > 0xFFFF)
293 {
294 *(p+1) = 1;
295 }
296 return p + 4;
297}
298
299/*
300 * smb_build_path: build the path to entry and name storing it in buf.
301 * The path returned will have the trailing '\0'.
302 */
303static int smb_build_path(struct smb_sb_info *server, unsigned char *buf,
304 int maxlen,
305 struct dentry *entry, struct qstr *name)
306{
307 unsigned char *path = buf;
308 int len;
309 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0;
310
311 if (maxlen < (2<<unicode))
312 return -ENAMETOOLONG;
313
314 if (maxlen > SMB_MAXPATHLEN + 1)
315 maxlen = SMB_MAXPATHLEN + 1;
316
317 if (entry == NULL)
318 goto test_name_and_out;
319
320 /*
321 * If IS_ROOT, we have to do no walking at all.
322 */
323 if (IS_ROOT(entry) && !name) {
324 *path++ = '\\';
325 if (unicode) *path++ = '\0';
326 *path++ = '\0';
327 if (unicode) *path++ = '\0';
328 return path-buf;
329 }
330
331 /*
332 * Build the path string walking the tree backward from end to ROOT
333 * and store it in reversed order [see reverse_string()]
334 */
335 dget(entry);
336 spin_lock(&entry->d_lock);
337 while (!IS_ROOT(entry)) {
338 struct dentry *parent;
339
340 if (maxlen < (3<<unicode)) {
341 spin_unlock(&entry->d_lock);
342 dput(entry);
343 return -ENAMETOOLONG;
344 }
345
346 len = server->ops->convert(path, maxlen-2,
347 entry->d_name.name, entry->d_name.len,
348 server->local_nls, server->remote_nls);
349 if (len < 0) {
350 spin_unlock(&entry->d_lock);
351 dput(entry);
352 return len;
353 }
354 reverse_string(path, len);
355 path += len;
356 if (unicode) {
357 /* Note: reverse order */
358 *path++ = '\0';
359 maxlen--;
360 }
361 *path++ = '\\';
362 maxlen -= len+1;
363
364 parent = entry->d_parent;
365 dget(parent);
366 spin_unlock(&entry->d_lock);
367 dput(entry);
368 entry = parent;
369 spin_lock(&entry->d_lock);
370 }
371 spin_unlock(&entry->d_lock);
372 dput(entry);
373 reverse_string(buf, path-buf);
374
375 /* maxlen has space for at least one char */
376test_name_and_out:
377 if (name) {
378 if (maxlen < (3<<unicode))
379 return -ENAMETOOLONG;
380 *path++ = '\\';
381 if (unicode) {
382 *path++ = '\0';
383 maxlen--;
384 }
385 len = server->ops->convert(path, maxlen-2,
386 name->name, name->len,
387 server->local_nls, server->remote_nls);
388 if (len < 0)
389 return len;
390 path += len;
391 maxlen -= len+1;
392 }
393 /* maxlen has space for at least one char */
394 *path++ = '\0';
395 if (unicode) *path++ = '\0';
396 return path-buf;
397}
398
399static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen,
400 struct dentry *dir, struct qstr *name)
401{
402 int result;
403
404 result = smb_build_path(server, buf, maxlen, dir, name);
405 if (result < 0)
406 goto out;
407 if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS)
408 str_upper(buf, result);
409out:
410 return result;
411}
412
413/* encode_path for non-trans2 request SMBs */
414static int smb_simple_encode_path(struct smb_request *req, char **p,
415 struct dentry * entry, struct qstr * name)
416{
417 struct smb_sb_info *server = req->rq_server;
418 char *s = *p;
419 int res;
420 int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s;
421 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
422
423 if (!maxlen)
424 return -ENAMETOOLONG;
425 *s++ = 4; /* ASCII data format */
426
427 /*
428 * SMB Unicode strings must be 16bit aligned relative the start of the
429 * packet. If they are not they must be padded with 0.
430 */
431 if (unicode) {
432 int align = s - (char *)req->rq_buffer;
433 if (!(align & 1)) {
434 *s++ = '\0';
435 maxlen--;
436 }
437 }
438
439 res = smb_encode_path(server, s, maxlen-1, entry, name);
440 if (res < 0)
441 return res;
442 *p = s + res;
443 return 0;
444}
445
446/* The following are taken directly from msdos-fs */
447
448/* Linear day numbers of the respective 1sts in non-leap years. */
449
450static int day_n[] =
451{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
452 /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
453
454
455static time_t
456utc2local(struct smb_sb_info *server, time_t time)
457{
458 return time - server->opt.serverzone*60;
459}
460
461static time_t
462local2utc(struct smb_sb_info *server, time_t time)
463{
464 return time + server->opt.serverzone*60;
465}
466
467/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
468
469static time_t
470date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time)
471{
472 int month, year;
473 time_t secs;
474
475 /* first subtract and mask after that... Otherwise, if
476 date == 0, bad things happen */
477 month = ((date >> 5) - 1) & 15;
478 year = date >> 9;
479 secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 *
480 ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 &&
481 month < 2 ? 1 : 0) + 3653);
482 /* days since 1.1.70 plus 80's leap day */
483 return local2utc(server, secs);
484}
485
486
487/* Convert linear UNIX date to a MS-DOS time/date pair. */
488
489static void
490date_unix2dos(struct smb_sb_info *server,
491 int unix_date, __u16 *date, __u16 *time)
492{
493 int day, year, nl_day, month;
494
495 unix_date = utc2local(server, unix_date);
496 if (unix_date < 315532800)
497 unix_date = 315532800;
498
499 *time = (unix_date % 60) / 2 +
500 (((unix_date / 60) % 60) << 5) +
501 (((unix_date / 3600) % 24) << 11);
502
503 day = unix_date / 86400 - 3652;
504 year = day / 365;
505 if ((year + 3) / 4 + 365 * year > day)
506 year--;
507 day -= (year + 3) / 4 + 365 * year;
508 if (day == 59 && !(year & 3)) {
509 nl_day = day;
510 month = 2;
511 } else {
512 nl_day = (year & 3) || day <= 59 ? day : day - 1;
513 for (month = 0; month < 12; month++)
514 if (day_n[month] > nl_day)
515 break;
516 }
517 *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
518}
519
520/* The following are taken from fs/ntfs/util.c */
521
522#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
523
524/*
525 * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
526 * into Unix UTC (based 1970-01-01, in seconds).
527 */
528static struct timespec
529smb_ntutc2unixutc(u64 ntutc)
530{
531 struct timespec ts;
532 /* FIXME: what about the timezone difference? */
533 /* Subtract the NTFS time offset, then convert to 1s intervals. */
534 u64 t = ntutc - NTFS_TIME_OFFSET;
535 ts.tv_nsec = do_div(t, 10000000) * 100;
536 ts.tv_sec = t;
537 return ts;
538}
539
540/* Convert the Unix UTC into NT time */
541static u64
542smb_unixutc2ntutc(struct timespec ts)
543{
544 /* Note: timezone conversion is probably wrong. */
545 /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */
546 return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET;
547}
548
549#define MAX_FILE_MODE 6
550static mode_t file_mode[] = {
551 S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK
552};
553
554static int smb_filetype_to_mode(u32 filetype)
555{
556 if (filetype > MAX_FILE_MODE) {
557 PARANOIA("Filetype out of range: %d\n", filetype);
558 return S_IFREG;
559 }
560 return file_mode[filetype];
561}
562
563static u32 smb_filetype_from_mode(int mode)
564{
565 if (S_ISREG(mode))
566 return UNIX_TYPE_FILE;
567 if (S_ISDIR(mode))
568 return UNIX_TYPE_DIR;
569 if (S_ISLNK(mode))
570 return UNIX_TYPE_SYMLINK;
571 if (S_ISCHR(mode))
572 return UNIX_TYPE_CHARDEV;
573 if (S_ISBLK(mode))
574 return UNIX_TYPE_BLKDEV;
575 if (S_ISFIFO(mode))
576 return UNIX_TYPE_FIFO;
577 if (S_ISSOCK(mode))
578 return UNIX_TYPE_SOCKET;
579 return UNIX_TYPE_UNKNOWN;
580}
581
582
583/*****************************************************************************/
584/* */
585/* Support section. */
586/* */
587/*****************************************************************************/
588
589__u32
590smb_len(__u8 * p)
591{
592 return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3);
593}
594
595static __u16
596smb_bcc(__u8 * packet)
597{
598 int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16);
599 return WVAL(packet, pos);
600}
601
602/* smb_valid_packet: We check if packet fulfills the basic
603 requirements of a smb packet */
604
605static int
606smb_valid_packet(__u8 * packet)
607{
608 return (packet[4] == 0xff
609 && packet[5] == 'S'
610 && packet[6] == 'M'
611 && packet[7] == 'B'
612 && (smb_len(packet) + 4 == SMB_HEADER_LEN
613 + SMB_WCT(packet) * 2 + smb_bcc(packet)));
614}
615
616/* smb_verify: We check if we got the answer we expected, and if we
617 got enough data. If bcc == -1, we don't care. */
618
619static int
620smb_verify(__u8 * packet, int command, int wct, int bcc)
621{
622 if (SMB_CMD(packet) != command)
623 goto bad_command;
624 if (SMB_WCT(packet) < wct)
625 goto bad_wct;
626 if (bcc != -1 && smb_bcc(packet) < bcc)
627 goto bad_bcc;
628 return 0;
629
630bad_command:
631 printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n",
632 command, SMB_CMD(packet));
633 goto fail;
634bad_wct:
635 printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n",
636 command, wct, SMB_WCT(packet));
637 goto fail;
638bad_bcc:
639 printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n",
640 command, bcc, smb_bcc(packet));
641fail:
642 return -EIO;
643}
644
645/*
646 * Returns the maximum read or write size for the "payload". Making all of the
647 * packet fit within the negotiated max_xmit size.
648 *
649 * N.B. Since this value is usually computed before locking the server,
650 * the server's packet size must never be decreased!
651 */
652static inline int
653smb_get_xmitsize(struct smb_sb_info *server, int overhead)
654{
655 return server->opt.max_xmit - overhead;
656}
657
658/*
659 * Calculate the maximum read size
660 */
661int
662smb_get_rsize(struct smb_sb_info *server)
663{
664 /* readX has 12 parameters, read has 5 */
665 int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2;
666 int size = smb_get_xmitsize(server, overhead);
667
668 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
669
670 return size;
671}
672
673/*
674 * Calculate the maximum write size
675 */
676int
677smb_get_wsize(struct smb_sb_info *server)
678{
679 /* writeX has 14 parameters, write has 5 */
680 int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2;
681 int size = smb_get_xmitsize(server, overhead);
682
683 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
684
685 return size;
686}
687
688/*
689 * Convert SMB error codes to -E... errno values.
690 */
691int
692smb_errno(struct smb_request *req)
693{
694 int errcls = req->rq_rcls;
695 int error = req->rq_err;
696 char *class = "Unknown";
697
698 VERBOSE("errcls %d code %d from command 0x%x\n",
699 errcls, error, SMB_CMD(req->rq_header));
700
701 if (errcls == ERRDOS) {
702 switch (error) {
703 case ERRbadfunc:
704 return -EINVAL;
705 case ERRbadfile:
706 case ERRbadpath:
707 return -ENOENT;
708 case ERRnofids:
709 return -EMFILE;
710 case ERRnoaccess:
711 return -EACCES;
712 case ERRbadfid:
713 return -EBADF;
714 case ERRbadmcb:
715 return -EREMOTEIO;
716 case ERRnomem:
717 return -ENOMEM;
718 case ERRbadmem:
719 return -EFAULT;
720 case ERRbadenv:
721 case ERRbadformat:
722 return -EREMOTEIO;
723 case ERRbadaccess:
724 return -EACCES;
725 case ERRbaddata:
726 return -E2BIG;
727 case ERRbaddrive:
728 return -ENXIO;
729 case ERRremcd:
730 return -EREMOTEIO;
731 case ERRdiffdevice:
732 return -EXDEV;
733 case ERRnofiles:
734 return -ENOENT;
735 case ERRbadshare:
736 return -ETXTBSY;
737 case ERRlock:
738 return -EDEADLK;
739 case ERRfilexists:
740 return -EEXIST;
741 case ERROR_INVALID_PARAMETER:
742 return -EINVAL;
743 case ERROR_DISK_FULL:
744 return -ENOSPC;
745 case ERROR_INVALID_NAME:
746 return -ENOENT;
747 case ERROR_DIR_NOT_EMPTY:
748 return -ENOTEMPTY;
749 case ERROR_NOT_LOCKED:
750 return -ENOLCK;
751 case ERROR_ALREADY_EXISTS:
752 return -EEXIST;
753 default:
754 class = "ERRDOS";
755 goto err_unknown;
756 }
757 } else if (errcls == ERRSRV) {
758 switch (error) {
759 /* N.B. This is wrong ... EIO ? */
760 case ERRerror:
761 return -ENFILE;
762 case ERRbadpw:
763 return -EINVAL;
764 case ERRbadtype:
765 case ERRtimeout:
766 return -EIO;
767 case ERRaccess:
768 return -EACCES;
769 /*
770 * This is a fatal error, as it means the "tree ID"
771 * for this connection is no longer valid. We map
772 * to a special error code and get a new connection.
773 */
774 case ERRinvnid:
775 return -EBADSLT;
776 default:
777 class = "ERRSRV";
778 goto err_unknown;
779 }
780 } else if (errcls == ERRHRD) {
781 switch (error) {
782 case ERRnowrite:
783 return -EROFS;
784 case ERRbadunit:
785 return -ENODEV;
786 case ERRnotready:
787 return -EUCLEAN;
788 case ERRbadcmd:
789 case ERRdata:
790 return -EIO;
791 case ERRbadreq:
792 return -ERANGE;
793 case ERRbadshare:
794 return -ETXTBSY;
795 case ERRlock:
796 return -EDEADLK;
797 case ERRdiskfull:
798 return -ENOSPC;
799 default:
800 class = "ERRHRD";
801 goto err_unknown;
802 }
803 } else if (errcls == ERRCMD) {
804 class = "ERRCMD";
805 } else if (errcls == SUCCESS) {
806 return 0; /* This is the only valid 0 return */
807 }
808
809err_unknown:
810 printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n",
811 class, error, SMB_CMD(req->rq_header));
812 return -EIO;
813}
814
815/* smb_request_ok: We expect the server to be locked. Then we do the
816 request and check the answer completely. When smb_request_ok
817 returns 0, you can be quite sure that everything went well. When
818 the answer is <=0, the returned number is a valid unix errno. */
819
820static int
821smb_request_ok(struct smb_request *req, int command, int wct, int bcc)
822{
823 int result;
824
825 req->rq_resp_wct = wct;
826 req->rq_resp_bcc = bcc;
827
828 result = smb_add_request(req);
829 if (result != 0) {
830 DEBUG1("smb_request failed\n");
831 goto out;
832 }
833
834 if (smb_valid_packet(req->rq_header) != 0) {
835 PARANOIA("invalid packet!\n");
836 goto out;
837 }
838
839 result = smb_verify(req->rq_header, command, wct, bcc);
840
841out:
842 return result;
843}
844
845/*
846 * This implements the NEWCONN ioctl. It installs the server pid,
847 * sets server->state to CONN_VALID, and wakes up the waiting process.
848 */
849int
850smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
851{
852 struct file *filp;
853 struct sock *sk;
854 int error;
855
856 VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid);
857
858 smb_lock_server(server);
859
860 /*
861 * Make sure we don't already have a valid connection ...
862 */
863 error = -EINVAL;
864 if (server->state == CONN_VALID)
865 goto out;
866
867 error = -EACCES;
868 if (current->uid != server->mnt->mounted_uid &&
869 !capable(CAP_SYS_ADMIN))
870 goto out;
871
872 error = -EBADF;
873 filp = fget(opt->fd);
874 if (!filp)
875 goto out;
876 if (!smb_valid_socket(filp->f_dentry->d_inode))
877 goto out_putf;
878
879 server->sock_file = filp;
880 server->conn_pid = current->pid;
881 server->opt = *opt;
882 server->generation += 1;
883 server->state = CONN_VALID;
884 error = 0;
885
886 if (server->conn_error) {
887 /*
888 * conn_error is the returncode we originally decided to
889 * drop the old connection on. This message should be positive
890 * and not make people ask questions on why smbfs is printing
891 * error messages ...
892 */
893 printk(KERN_INFO "SMB connection re-established (%d)\n",
894 server->conn_error);
895 server->conn_error = 0;
896 }
897
898 /*
899 * Store the server in sock user_data (Only used by sunrpc)
900 */
901 sk = SOCKET_I(filp->f_dentry->d_inode)->sk;
902 sk->sk_user_data = server;
903
904 /* chain into the data_ready callback */
905 server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready);
906
907 /* check if we have an old smbmount that uses seconds for the
908 serverzone */
909 if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60)
910 server->opt.serverzone /= 60;
911
912 /* now that we have an established connection we can detect the server
913 type and enable bug workarounds */
914 if (server->opt.protocol < SMB_PROTOCOL_LANMAN2)
915 install_ops(server->ops, &smb_ops_core);
916 else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2)
917 install_ops(server->ops, &smb_ops_os2);
918 else if (server->opt.protocol == SMB_PROTOCOL_NT1 &&
919 (server->opt.max_xmit < 0x1000) &&
920 !(server->opt.capabilities & SMB_CAP_NT_SMBS)) {
921 /* FIXME: can we kill the WIN95 flag now? */
922 server->mnt->flags |= SMB_MOUNT_WIN95;
923 VERBOSE("detected WIN95 server\n");
924 install_ops(server->ops, &smb_ops_win95);
925 } else {
926 /*
927 * Samba has max_xmit 65535
928 * NT4spX has max_xmit 4536 (or something like that)
929 * win2k has ...
930 */
931 VERBOSE("detected NT1 (Samba, NT4/5) server\n");
932 install_ops(server->ops, &smb_ops_winNT);
933 }
934
935 /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */
936 if (server->mnt->flags & SMB_MOUNT_OLDATTR) {
937 server->ops->getattr = smb_proc_getattr_core;
938 } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) {
939 server->ops->getattr = smb_proc_getattr_ff;
940 }
941
942 /* Decode server capabilities */
943 if (server->opt.capabilities & SMB_CAP_LARGE_FILES) {
944 /* Should be ok to set this now, as no one can access the
945 mount until the connection has been established. */
946 SB_of(server)->s_maxbytes = ~0ULL >> 1;
947 VERBOSE("LFS enabled\n");
948 }
949 if (server->opt.capabilities & SMB_CAP_UNICODE) {
950 server->mnt->flags |= SMB_MOUNT_UNICODE;
951 VERBOSE("Unicode enabled\n");
952 } else {
953 server->mnt->flags &= ~SMB_MOUNT_UNICODE;
954 }
955#if 0
956 /* flags we may test for other patches ... */
957 if (server->opt.capabilities & SMB_CAP_LARGE_READX) {
958 VERBOSE("Large reads enabled\n");
959 }
960 if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) {
961 VERBOSE("Large writes enabled\n");
962 }
963#endif
964 if (server->opt.capabilities & SMB_CAP_UNIX) {
965 struct inode *inode;
966 VERBOSE("Using UNIX CIFS extensions\n");
967 install_ops(server->ops, &smb_ops_unix);
968 inode = SB_of(server)->s_root->d_inode;
969 if (inode)
970 inode->i_op = &smb_dir_inode_operations_unix;
971 }
972
973 VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n",
974 server->opt.protocol, server->opt.max_xmit, server->conn_pid,
975 server->opt.capabilities);
976
977 /* FIXME: this really should be done by smbmount. */
978 if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) {
979 server->opt.max_xmit = SMB_MAX_PACKET_SIZE;
980 }
981
982 smb_unlock_server(server);
983 smbiod_wake_up();
984 if (server->opt.capabilities & SMB_CAP_UNIX)
985 smb_proc_query_cifsunix(server);
986
987 server->conn_complete++;
988 wake_up_interruptible_all(&server->conn_wq);
989 return error;
990
991out:
992 smb_unlock_server(server);
993 smbiod_wake_up();
994 return error;
995
996out_putf:
997 fput(filp);
998 goto out;
999}
1000
1001/* smb_setup_header: We completely set up the packet. You only have to
1002 insert the command-specific fields */
1003
1004__u8 *
1005smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc)
1006{
1007 __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2;
1008 __u8 *p = req->rq_header;
1009 struct smb_sb_info *server = req->rq_server;
1010
1011 p = smb_encode_smb_length(p, xmit_len - 4);
1012
1013 *p++ = 0xff;
1014 *p++ = 'S';
1015 *p++ = 'M';
1016 *p++ = 'B';
1017 *p++ = command;
1018
1019 memset(p, '\0', 19);
1020 p += 19;
1021 p += 8;
1022
1023 if (server->opt.protocol > SMB_PROTOCOL_CORE) {
1024 int flags = SMB_FLAGS_CASELESS_PATHNAMES;
1025 int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS |
1026 SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */
1027
1028 *(req->rq_header + smb_flg) = flags;
1029 if (server->mnt->flags & SMB_MOUNT_UNICODE)
1030 flags2 |= SMB_FLAGS2_UNICODE_STRINGS;
1031 WSET(req->rq_header, smb_flg2, flags2);
1032 }
1033 *p++ = wct; /* wct */
1034 p += 2 * wct;
1035 WSET(p, 0, bcc);
1036
1037 /* Include the header in the data to send */
1038 req->rq_iovlen = 1;
1039 req->rq_iov[0].iov_base = req->rq_header;
1040 req->rq_iov[0].iov_len = xmit_len - bcc;
1041
1042 return req->rq_buffer;
1043}
1044
1045static void
1046smb_setup_bcc(struct smb_request *req, __u8 *p)
1047{
1048 u16 bcc = p - req->rq_buffer;
1049 u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header);
1050
1051 WSET(pbcc, 0, bcc);
1052
1053 smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN +
1054 2*SMB_WCT(req->rq_header) - 2 + bcc);
1055
1056 /* Include the "bytes" in the data to send */
1057 req->rq_iovlen = 2;
1058 req->rq_iov[1].iov_base = req->rq_buffer;
1059 req->rq_iov[1].iov_len = bcc;
1060}
1061
1062static int
1063smb_proc_seek(struct smb_sb_info *server, __u16 fileid,
1064 __u16 mode, off_t offset)
1065{
1066 int result;
1067 struct smb_request *req;
1068
1069 result = -ENOMEM;
1070 if (! (req = smb_alloc_request(server, 0)))
1071 goto out;
1072
1073 smb_setup_header(req, SMBlseek, 4, 0);
1074 WSET(req->rq_header, smb_vwv0, fileid);
1075 WSET(req->rq_header, smb_vwv1, mode);
1076 DSET(req->rq_header, smb_vwv2, offset);
1077 req->rq_flags |= SMB_REQ_NORETRY;
1078
1079 result = smb_request_ok(req, SMBlseek, 2, 0);
1080 if (result < 0) {
1081 result = 0;
1082 goto out_free;
1083 }
1084
1085 result = DVAL(req->rq_header, smb_vwv0);
1086out_free:
1087 smb_rput(req);
1088out:
1089 return result;
1090}
1091
1092static int
1093smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish)
1094{
1095 struct inode *ino = dentry->d_inode;
1096 struct smb_inode_info *ei = SMB_I(ino);
1097 int mode, read_write = 0x42, read_only = 0x40;
1098 int res;
1099 char *p;
1100 struct smb_request *req;
1101
1102 /*
1103 * Attempt to open r/w, unless there are no write privileges.
1104 */
1105 mode = read_write;
1106 if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
1107 mode = read_only;
1108#if 0
1109 /* FIXME: why is this code not in? below we fix it so that a caller
1110 wanting RO doesn't get RW. smb_revalidate_inode does some
1111 optimization based on access mode. tail -f needs it to be correct.
1112
1113 We must open rw since we don't do the open if called a second time
1114 with different 'wish'. Is that not supported by smb servers? */
1115 if (!(wish & (O_WRONLY | O_RDWR)))
1116 mode = read_only;
1117#endif
1118
1119 res = -ENOMEM;
1120 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1121 goto out;
1122
1123 retry:
1124 p = smb_setup_header(req, SMBopen, 2, 0);
1125 WSET(req->rq_header, smb_vwv0, mode);
1126 WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR);
1127 res = smb_simple_encode_path(req, &p, dentry, NULL);
1128 if (res < 0)
1129 goto out_free;
1130 smb_setup_bcc(req, p);
1131
1132 res = smb_request_ok(req, SMBopen, 7, 0);
1133 if (res != 0) {
1134 if (mode == read_write &&
1135 (res == -EACCES || res == -ETXTBSY || res == -EROFS))
1136 {
1137 VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n",
1138 DENTRY_PATH(dentry), res);
1139 mode = read_only;
1140 req->rq_flags = 0;
1141 goto retry;
1142 }
1143 goto out_free;
1144 }
1145 /* We should now have data in vwv[0..6]. */
1146
1147 ei->fileid = WVAL(req->rq_header, smb_vwv0);
1148 ei->attr = WVAL(req->rq_header, smb_vwv1);
1149 /* smb_vwv2 has mtime */
1150 /* smb_vwv4 has size */
1151 ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK);
1152 ei->open = server->generation;
1153
1154out_free:
1155 smb_rput(req);
1156out:
1157 return res;
1158}
1159
1160/*
1161 * Make sure the file is open, and check that the access
1162 * is compatible with the desired access.
1163 */
1164int
1165smb_open(struct dentry *dentry, int wish)
1166{
1167 struct inode *inode = dentry->d_inode;
1168 int result;
1169 __u16 access;
1170
1171 result = -ENOENT;
1172 if (!inode) {
1173 printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n",
1174 DENTRY_PATH(dentry));
1175 goto out;
1176 }
1177
1178 if (!smb_is_open(inode)) {
1179 struct smb_sb_info *server = server_from_inode(inode);
1180 result = 0;
1181 if (!smb_is_open(inode))
1182 result = smb_proc_open(server, dentry, wish);
1183 if (result)
1184 goto out;
1185 /*
1186 * A successful open means the path is still valid ...
1187 */
1188 smb_renew_times(dentry);
1189 }
1190
1191 /*
1192 * Check whether the access is compatible with the desired mode.
1193 */
1194 result = 0;
1195 access = SMB_I(inode)->access;
1196 if (access != wish && access != SMB_O_RDWR) {
1197 PARANOIA("%s/%s access denied, access=%x, wish=%x\n",
1198 DENTRY_PATH(dentry), access, wish);
1199 result = -EACCES;
1200 }
1201out:
1202 return result;
1203}
1204
1205static int
1206smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime)
1207{
1208 struct smb_request *req;
1209 int result = -ENOMEM;
1210
1211 if (! (req = smb_alloc_request(server, 0)))
1212 goto out;
1213
1214 smb_setup_header(req, SMBclose, 3, 0);
1215 WSET(req->rq_header, smb_vwv0, fileid);
1216 DSET(req->rq_header, smb_vwv1, utc2local(server, mtime));
1217 req->rq_flags |= SMB_REQ_NORETRY;
1218 result = smb_request_ok(req, SMBclose, 0, 0);
1219
1220 smb_rput(req);
1221out:
1222 return result;
1223}
1224
1225/*
1226 * Win NT 4.0 has an apparent bug in that it fails to update the
1227 * modify time when writing to a file. As a workaround, we update
1228 * both modify and access time locally, and post the times to the
1229 * server when closing the file.
1230 */
1231static int
1232smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino)
1233{
1234 struct smb_inode_info *ei = SMB_I(ino);
1235 int result = 0;
1236 if (smb_is_open(ino))
1237 {
1238 /*
1239 * We clear the open flag in advance, in case another
1240 * process observes the value while we block below.
1241 */
1242 ei->open = 0;
1243
1244 /*
1245 * Kludge alert: SMB timestamps are accurate only to
1246 * two seconds ... round the times to avoid needless
1247 * cache invalidations!
1248 */
1249 if (ino->i_mtime.tv_sec & 1) {
1250 ino->i_mtime.tv_sec--;
1251 ino->i_mtime.tv_nsec = 0;
1252 }
1253 if (ino->i_atime.tv_sec & 1) {
1254 ino->i_atime.tv_sec--;
1255 ino->i_atime.tv_nsec = 0;
1256 }
1257 /*
1258 * If the file is open with write permissions,
1259 * update the time stamps to sync mtime and atime.
1260 */
1261 if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 &&
1262 (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) &&
1263 !(ei->access == SMB_O_RDONLY))
1264 {
1265 struct smb_fattr fattr;
1266 smb_get_inode_attr(ino, &fattr);
1267 smb_proc_setattr_ext(server, ino, &fattr);
1268 }
1269
1270 result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec);
1271 /*
1272 * Force a revalidation after closing ... some servers
1273 * don't post the size until the file has been closed.
1274 */
1275 if (server->opt.protocol < SMB_PROTOCOL_NT1)
1276 ei->oldmtime = 0;
1277 ei->closed = jiffies;
1278 }
1279 return result;
1280}
1281
1282int
1283smb_close(struct inode *ino)
1284{
1285 int result = 0;
1286
1287 if (smb_is_open(ino)) {
1288 struct smb_sb_info *server = server_from_inode(ino);
1289 result = smb_proc_close_inode(server, ino);
1290 }
1291 return result;
1292}
1293
1294/*
1295 * This is used to close a file following a failed instantiate.
1296 * Since we don't have an inode, we can't use any of the above.
1297 */
1298int
1299smb_close_fileid(struct dentry *dentry, __u16 fileid)
1300{
1301 struct smb_sb_info *server = server_from_dentry(dentry);
1302 int result;
1303
1304 result = smb_proc_close(server, fileid, get_seconds());
1305 return result;
1306}
1307
1308/* In smb_proc_read and smb_proc_write we do not retry, because the
1309 file-id would not be valid after a reconnection. */
1310
1311static void
1312smb_proc_read_data(struct smb_request *req)
1313{
1314 req->rq_iov[0].iov_base = req->rq_buffer;
1315 req->rq_iov[0].iov_len = 3;
1316
1317 req->rq_iov[1].iov_base = req->rq_page;
1318 req->rq_iov[1].iov_len = req->rq_rsize;
1319 req->rq_iovlen = 2;
1320
1321 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1322}
1323
1324static int
1325smb_proc_read(struct inode *inode, loff_t offset, int count, char *data)
1326{
1327 struct smb_sb_info *server = server_from_inode(inode);
1328 __u16 returned_count, data_len;
1329 unsigned char *buf;
1330 int result;
1331 struct smb_request *req;
1332 u8 rbuf[4];
1333
1334 result = -ENOMEM;
1335 if (! (req = smb_alloc_request(server, 0)))
1336 goto out;
1337
1338 smb_setup_header(req, SMBread, 5, 0);
1339 buf = req->rq_header;
1340 WSET(buf, smb_vwv0, SMB_I(inode)->fileid);
1341 WSET(buf, smb_vwv1, count);
1342 DSET(buf, smb_vwv2, offset);
1343 WSET(buf, smb_vwv4, 0);
1344
1345 req->rq_page = data;
1346 req->rq_rsize = count;
1347 req->rq_callback = smb_proc_read_data;
1348 req->rq_buffer = rbuf;
1349 req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC;
1350
1351 result = smb_request_ok(req, SMBread, 5, -1);
1352 if (result < 0)
1353 goto out_free;
1354 returned_count = WVAL(req->rq_header, smb_vwv0);
1355
1356 data_len = WVAL(rbuf, 1);
1357
1358 if (returned_count != data_len) {
1359 printk(KERN_NOTICE "smb_proc_read: returned != data_len\n");
1360 printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n",
1361 returned_count, data_len);
1362 }
1363 result = data_len;
1364
1365out_free:
1366 smb_rput(req);
1367out:
1368 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1369 inode->i_ino, SMB_I(inode)->fileid, count, result);
1370 return result;
1371}
1372
1373static int
1374smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data)
1375{
1376 struct smb_sb_info *server = server_from_inode(inode);
1377 int result;
1378 u16 fileid = SMB_I(inode)->fileid;
1379 u8 buf[4];
1380 struct smb_request *req;
1381
1382 result = -ENOMEM;
1383 if (! (req = smb_alloc_request(server, 0)))
1384 goto out;
1385
1386 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1387 inode->i_ino, fileid, count, offset);
1388
1389 smb_setup_header(req, SMBwrite, 5, count + 3);
1390 WSET(req->rq_header, smb_vwv0, fileid);
1391 WSET(req->rq_header, smb_vwv1, count);
1392 DSET(req->rq_header, smb_vwv2, offset);
1393 WSET(req->rq_header, smb_vwv4, 0);
1394
1395 buf[0] = 1;
1396 WSET(buf, 1, count); /* yes, again ... */
1397 req->rq_iov[1].iov_base = buf;
1398 req->rq_iov[1].iov_len = 3;
1399 req->rq_iov[2].iov_base = (char *) data;
1400 req->rq_iov[2].iov_len = count;
1401 req->rq_iovlen = 3;
1402 req->rq_flags |= SMB_REQ_NORETRY;
1403
1404 result = smb_request_ok(req, SMBwrite, 1, 0);
1405 if (result >= 0)
1406 result = WVAL(req->rq_header, smb_vwv0);
1407
1408 smb_rput(req);
1409out:
1410 return result;
1411}
1412
1413/*
1414 * In smb_proc_readX and smb_proc_writeX we do not retry, because the
1415 * file-id would not be valid after a reconnection.
1416 */
1417
1418#define SMB_READX_MAX_PAD 64
1419static void
1420smb_proc_readX_data(struct smb_request *req)
1421{
1422 /* header length, excluding the netbios length (-4) */
1423 int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2;
1424 int data_off = WVAL(req->rq_header, smb_vwv6);
1425
1426 /*
1427 * Some genius made the padding to the data bytes arbitrary.
1428 * So we must first calculate the amount of padding used by the server.
1429 */
1430 data_off -= hdrlen;
1431 if (data_off > SMB_READX_MAX_PAD || data_off < 0) {
1432 PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n");
1433 PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off);
1434 req->rq_rlen = req->rq_bufsize + 1;
1435 return;
1436 }
1437 req->rq_iov[0].iov_base = req->rq_buffer;
1438 req->rq_iov[0].iov_len = data_off;
1439
1440 req->rq_iov[1].iov_base = req->rq_page;
1441 req->rq_iov[1].iov_len = req->rq_rsize;
1442 req->rq_iovlen = 2;
1443
1444 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1445}
1446
1447static int
1448smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data)
1449{
1450 struct smb_sb_info *server = server_from_inode(inode);
1451 unsigned char *buf;
1452 int result;
1453 struct smb_request *req;
1454 static char pad[SMB_READX_MAX_PAD];
1455
1456 result = -ENOMEM;
1457 if (! (req = smb_alloc_request(server, 0)))
1458 goto out;
1459
1460 smb_setup_header(req, SMBreadX, 12, 0);
1461 buf = req->rq_header;
1462 WSET(buf, smb_vwv0, 0x00ff);
1463 WSET(buf, smb_vwv1, 0);
1464 WSET(buf, smb_vwv2, SMB_I(inode)->fileid);
1465 DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */
1466 WSET(buf, smb_vwv5, count);
1467 WSET(buf, smb_vwv6, 0);
1468 DSET(buf, smb_vwv7, 0);
1469 WSET(buf, smb_vwv9, 0);
1470 DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */
1471 WSET(buf, smb_vwv11, 0);
1472
1473 req->rq_page = data;
1474 req->rq_rsize = count;
1475 req->rq_callback = smb_proc_readX_data;
1476 req->rq_buffer = pad;
1477 req->rq_bufsize = SMB_READX_MAX_PAD;
1478 req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY;
1479
1480 result = smb_request_ok(req, SMBreadX, 12, -1);
1481 if (result < 0)
1482 goto out_free;
1483 result = WVAL(req->rq_header, smb_vwv5);
1484
1485out_free:
1486 smb_rput(req);
1487out:
1488 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1489 inode->i_ino, SMB_I(inode)->fileid, count, result);
1490 return result;
1491}
1492
1493static int
1494smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data)
1495{
1496 struct smb_sb_info *server = server_from_inode(inode);
1497 int result;
1498 u8 *p;
1499 static u8 pad[4];
1500 struct smb_request *req;
1501
1502 result = -ENOMEM;
1503 if (! (req = smb_alloc_request(server, 0)))
1504 goto out;
1505
1506 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1507 inode->i_ino, SMB_I(inode)->fileid, count, offset);
1508
1509 p = smb_setup_header(req, SMBwriteX, 14, count + 1);
1510 WSET(req->rq_header, smb_vwv0, 0x00ff);
1511 WSET(req->rq_header, smb_vwv1, 0);
1512 WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid);
1513 DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */
1514 DSET(req->rq_header, smb_vwv5, 0);
1515 WSET(req->rq_header, smb_vwv7, 0); /* write mode */
1516 WSET(req->rq_header, smb_vwv8, 0);
1517 WSET(req->rq_header, smb_vwv9, 0);
1518 WSET(req->rq_header, smb_vwv10, count); /* data length */
1519 WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1);
1520 DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32));
1521
1522 req->rq_iov[1].iov_base = pad;
1523 req->rq_iov[1].iov_len = 1;
1524 req->rq_iov[2].iov_base = (char *) data;
1525 req->rq_iov[2].iov_len = count;
1526 req->rq_iovlen = 3;
1527 req->rq_flags |= SMB_REQ_NORETRY;
1528
1529 result = smb_request_ok(req, SMBwriteX, 6, 0);
1530 if (result >= 0)
1531 result = WVAL(req->rq_header, smb_vwv2);
1532
1533 smb_rput(req);
1534out:
1535 return result;
1536}
1537
1538int
1539smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid)
1540{
1541 struct smb_sb_info *server = server_from_dentry(dentry);
1542 char *p;
1543 int result;
1544 struct smb_request *req;
1545
1546 result = -ENOMEM;
1547 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1548 goto out;
1549
1550 p = smb_setup_header(req, SMBcreate, 3, 0);
1551 WSET(req->rq_header, smb_vwv0, attr);
1552 DSET(req->rq_header, smb_vwv1, utc2local(server, ctime));
1553 result = smb_simple_encode_path(req, &p, dentry, NULL);
1554 if (result < 0)
1555 goto out_free;
1556 smb_setup_bcc(req, p);
1557
1558 result = smb_request_ok(req, SMBcreate, 1, 0);
1559 if (result < 0)
1560 goto out_free;
1561
1562 *fileid = WVAL(req->rq_header, smb_vwv0);
1563 result = 0;
1564
1565out_free:
1566 smb_rput(req);
1567out:
1568 return result;
1569}
1570
1571int
1572smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry)
1573{
1574 struct smb_sb_info *server = server_from_dentry(old_dentry);
1575 char *p;
1576 int result;
1577 struct smb_request *req;
1578
1579 result = -ENOMEM;
1580 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1581 goto out;
1582
1583 p = smb_setup_header(req, SMBmv, 1, 0);
1584 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR);
1585 result = smb_simple_encode_path(req, &p, old_dentry, NULL);
1586 if (result < 0)
1587 goto out_free;
1588 result = smb_simple_encode_path(req, &p, new_dentry, NULL);
1589 if (result < 0)
1590 goto out_free;
1591 smb_setup_bcc(req, p);
1592
1593 if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0)
1594 goto out_free;
1595 result = 0;
1596
1597out_free:
1598 smb_rput(req);
1599out:
1600 return result;
1601}
1602
1603/*
1604 * Code common to mkdir and rmdir.
1605 */
1606static int
1607smb_proc_generic_command(struct dentry *dentry, __u8 command)
1608{
1609 struct smb_sb_info *server = server_from_dentry(dentry);
1610 char *p;
1611 int result;
1612 struct smb_request *req;
1613
1614 result = -ENOMEM;
1615 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1616 goto out;
1617
1618 p = smb_setup_header(req, command, 0, 0);
1619 result = smb_simple_encode_path(req, &p, dentry, NULL);
1620 if (result < 0)
1621 goto out_free;
1622 smb_setup_bcc(req, p);
1623
1624 result = smb_request_ok(req, command, 0, 0);
1625 if (result < 0)
1626 goto out_free;
1627 result = 0;
1628
1629out_free:
1630 smb_rput(req);
1631out:
1632 return result;
1633}
1634
1635int
1636smb_proc_mkdir(struct dentry *dentry)
1637{
1638 return smb_proc_generic_command(dentry, SMBmkdir);
1639}
1640
1641int
1642smb_proc_rmdir(struct dentry *dentry)
1643{
1644 return smb_proc_generic_command(dentry, SMBrmdir);
1645}
1646
1647#if SMBFS_POSIX_UNLINK
1648/*
1649 * Removes readonly attribute from a file. Used by unlink to give posix
1650 * semantics.
1651 */
1652static int
1653smb_set_rw(struct dentry *dentry,struct smb_sb_info *server)
1654{
1655 int result;
1656 struct smb_fattr fattr;
1657
1658 /* FIXME: cifsUE should allow removing a readonly file. */
1659
1660 /* first get current attribute */
1661 smb_init_dirent(server, &fattr);
1662 result = server->ops->getattr(server, dentry, &fattr);
1663 smb_finish_dirent(server, &fattr);
1664 if (result < 0)
1665 return result;
1666
1667 /* if RONLY attribute is set, remove it */
1668 if (fattr.attr & aRONLY) { /* read only attribute is set */
1669 fattr.attr &= ~aRONLY;
1670 result = smb_proc_setattr_core(server, dentry, fattr.attr);
1671 }
1672 return result;
1673}
1674#endif
1675
1676int
1677smb_proc_unlink(struct dentry *dentry)
1678{
1679 struct smb_sb_info *server = server_from_dentry(dentry);
1680 int flag = 0;
1681 char *p;
1682 int result;
1683 struct smb_request *req;
1684
1685 result = -ENOMEM;
1686 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1687 goto out;
1688
1689 retry:
1690 p = smb_setup_header(req, SMBunlink, 1, 0);
1691 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN);
1692 result = smb_simple_encode_path(req, &p, dentry, NULL);
1693 if (result < 0)
1694 goto out_free;
1695 smb_setup_bcc(req, p);
1696
1697 if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) {
1698#if SMBFS_POSIX_UNLINK
1699 if (result == -EACCES && !flag) {
1700 /* Posix semantics is for the read-only state
1701 of a file to be ignored in unlink(). In the
1702 SMB world a unlink() is refused on a
1703 read-only file. To make things easier for
1704 unix users we try to override the files
1705 permission if the unlink fails with the
1706 right error.
1707 This introduces a race condition that could
1708 lead to a file being written by someone who
1709 shouldn't have access, but as far as I can
1710 tell that is unavoidable */
1711
1712 /* remove RONLY attribute and try again */
1713 result = smb_set_rw(dentry,server);
1714 if (result == 0) {
1715 flag = 1;
1716 req->rq_flags = 0;
1717 goto retry;
1718 }
1719 }
1720#endif
1721 goto out_free;
1722 }
1723 result = 0;
1724
1725out_free:
1726 smb_rput(req);
1727out:
1728 return result;
1729}
1730
1731int
1732smb_proc_flush(struct smb_sb_info *server, __u16 fileid)
1733{
1734 int result;
1735 struct smb_request *req;
1736
1737 result = -ENOMEM;
1738 if (! (req = smb_alloc_request(server, 0)))
1739 goto out;
1740
1741 smb_setup_header(req, SMBflush, 1, 0);
1742 WSET(req->rq_header, smb_vwv0, fileid);
1743 req->rq_flags |= SMB_REQ_NORETRY;
1744 result = smb_request_ok(req, SMBflush, 0, 0);
1745
1746 smb_rput(req);
1747out:
1748 return result;
1749}
1750
1751static int
1752smb_proc_trunc32(struct inode *inode, loff_t length)
1753{
1754 /*
1755 * Writing 0bytes is old-SMB magic for truncating files.
1756 * MAX_NON_LFS should prevent this from being called with a too
1757 * large offset.
1758 */
1759 return smb_proc_write(inode, length, 0, NULL);
1760}
1761
1762static int
1763smb_proc_trunc64(struct inode *inode, loff_t length)
1764{
1765 struct smb_sb_info *server = server_from_inode(inode);
1766 int result;
1767 char *param;
1768 char *data;
1769 struct smb_request *req;
1770
1771 result = -ENOMEM;
1772 if (! (req = smb_alloc_request(server, 14)))
1773 goto out;
1774
1775 param = req->rq_buffer;
1776 data = req->rq_buffer + 6;
1777
1778 /* FIXME: must we also set allocation size? winNT seems to do that */
1779 WSET(param, 0, SMB_I(inode)->fileid);
1780 WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO);
1781 WSET(param, 4, 0);
1782 LSET(data, 0, length);
1783
1784 req->rq_trans2_command = TRANSACT2_SETFILEINFO;
1785 req->rq_ldata = 8;
1786 req->rq_data = data;
1787 req->rq_lparm = 6;
1788 req->rq_parm = param;
1789 req->rq_flags |= SMB_REQ_NORETRY;
1790 result = smb_add_request(req);
1791 if (result < 0)
1792 goto out_free;
1793
1794 result = 0;
1795 if (req->rq_rcls != 0)
1796 result = smb_errno(req);
1797
1798out_free:
1799 smb_rput(req);
1800out:
1801 return result;
1802}
1803
1804static int
1805smb_proc_trunc95(struct inode *inode, loff_t length)
1806{
1807 struct smb_sb_info *server = server_from_inode(inode);
1808 int result = smb_proc_trunc32(inode, length);
1809
1810 /*
1811 * win9x doesn't appear to update the size immediately.
1812 * It will return the old file size after the truncate,
1813 * confusing smbfs. So we force an update.
1814 *
1815 * FIXME: is this still necessary?
1816 */
1817 smb_proc_flush(server, SMB_I(inode)->fileid);
1818 return result;
1819}
1820
1821static void
1822smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1823{
1824 memset(fattr, 0, sizeof(*fattr));
1825
1826 fattr->f_nlink = 1;
1827 fattr->f_uid = server->mnt->uid;
1828 fattr->f_gid = server->mnt->gid;
1829 fattr->f_blksize = SMB_ST_BLKSIZE;
1830 fattr->f_unix = 0;
1831}
1832
1833static void
1834smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1835{
1836 if (fattr->f_unix)
1837 return;
1838
1839 fattr->f_mode = server->mnt->file_mode;
1840 if (fattr->attr & aDIR) {
1841 fattr->f_mode = server->mnt->dir_mode;
1842 fattr->f_size = SMB_ST_BLKSIZE;
1843 }
1844 /* Check the read-only flag */
1845 if (fattr->attr & aRONLY)
1846 fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
1847
1848 /* How many 512 byte blocks do we need for this file? */
1849 fattr->f_blocks = 0;
1850 if (fattr->f_size != 0)
1851 fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9);
1852 return;
1853}
1854
1855void
1856smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr,
1857 struct super_block *sb)
1858{
1859 smb_init_dirent(server, fattr);
1860 fattr->attr = aDIR;
1861 fattr->f_ino = 2; /* traditional root inode number */
1862 fattr->f_mtime = current_fs_time(sb);
1863 smb_finish_dirent(server, fattr);
1864}
1865
1866/*
1867 * Decode a dirent for old protocols
1868 *
1869 * qname is filled with the decoded, and possibly translated, name.
1870 * fattr receives decoded attributes
1871 *
1872 * Bugs Noted:
1873 * (1) Pathworks servers may pad the name with extra spaces.
1874 */
1875static char *
1876smb_decode_short_dirent(struct smb_sb_info *server, char *p,
1877 struct qstr *qname, struct smb_fattr *fattr,
1878 unsigned char *name_buf)
1879{
1880 int len;
1881
1882 /*
1883 * SMB doesn't have a concept of inode numbers ...
1884 */
1885 smb_init_dirent(server, fattr);
1886 fattr->f_ino = 0; /* FIXME: do we need this? */
1887
1888 p += SMB_STATUS_SIZE; /* reserved (search_status) */
1889 fattr->attr = *p;
1890 fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1));
1891 fattr->f_mtime.tv_nsec = 0;
1892 fattr->f_size = DVAL(p, 5);
1893 fattr->f_ctime = fattr->f_mtime;
1894 fattr->f_atime = fattr->f_mtime;
1895 qname->name = p + 9;
1896 len = strnlen(qname->name, 12);
1897
1898 /*
1899 * Trim trailing blanks for Pathworks servers
1900 */
1901 while (len > 2 && qname->name[len-1] == ' ')
1902 len--;
1903
1904 smb_finish_dirent(server, fattr);
1905
1906#if 0
1907 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
1908 allow the flag to be set anyway. It kills const. Remove? */
1909 switch (server->opt.case_handling) {
1910 case SMB_CASE_UPPER:
1911 str_upper(entry->name, len);
1912 break;
1913 case SMB_CASE_LOWER:
1914 str_lower(entry->name, len);
1915 break;
1916 default:
1917 break;
1918 }
1919#endif
1920
1921 qname->len = 0;
1922 len = server->ops->convert(name_buf, SMB_MAXNAMELEN,
1923 qname->name, len,
1924 server->remote_nls, server->local_nls);
1925 if (len > 0) {
1926 qname->len = len;
1927 qname->name = name_buf;
1928 DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name);
1929 }
1930
1931 return p + 22;
1932}
1933
1934/*
1935 * This routine is used to read in directory entries from the network.
1936 * Note that it is for short directory name seeks, i.e.: protocol <
1937 * SMB_PROTOCOL_LANMAN2
1938 */
1939static int
1940smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir,
1941 struct smb_cache_control *ctl)
1942{
1943 struct dentry *dir = filp->f_dentry;
1944 struct smb_sb_info *server = server_from_dentry(dir);
1945 struct qstr qname;
1946 struct smb_fattr fattr;
1947 char *p;
1948 int result;
1949 int i, first, entries_seen, entries;
1950 int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE;
1951 __u16 bcc;
1952 __u16 count;
1953 char status[SMB_STATUS_SIZE];
1954 static struct qstr mask = {
1955 .name = "*.*",
1956 .len = 3,
1957 };
1958 unsigned char *last_status;
1959 struct smb_request *req;
1960 unsigned char *name_buf;
1961
1962 VERBOSE("%s/%s\n", DENTRY_PATH(dir));
1963
1964 lock_kernel();
1965
1966 result = -ENOMEM;
1967 if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL)))
1968 goto out;
1969
1970 first = 1;
1971 entries = 0;
1972 entries_seen = 2; /* implicit . and .. */
1973
1974 result = -ENOMEM;
1975 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
1976 goto out_name;
1977
1978 while (1) {
1979 p = smb_setup_header(req, SMBsearch, 2, 0);
1980 WSET(req->rq_header, smb_vwv0, entries_asked);
1981 WSET(req->rq_header, smb_vwv1, aDIR);
1982 if (first == 1) {
1983 result = smb_simple_encode_path(req, &p, dir, &mask);
1984 if (result < 0)
1985 goto out_free;
1986 if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) {
1987 result = -ENAMETOOLONG;
1988 goto out_free;
1989 }
1990 *p++ = 5;
1991 WSET(p, 0, 0);
1992 p += 2;
1993 first = 0;
1994 } else {
1995 if (p + 5 + SMB_STATUS_SIZE >
1996 (char *)req->rq_buffer + req->rq_bufsize) {
1997 result = -ENAMETOOLONG;
1998 goto out_free;
1999 }
2000
2001 *p++ = 4;
2002 *p++ = 0;
2003 *p++ = 5;
2004 WSET(p, 0, SMB_STATUS_SIZE);
2005 p += 2;
2006 memcpy(p, status, SMB_STATUS_SIZE);
2007 p += SMB_STATUS_SIZE;
2008 }
2009
2010 smb_setup_bcc(req, p);
2011
2012 result = smb_request_ok(req, SMBsearch, 1, -1);
2013 if (result < 0) {
2014 if ((req->rq_rcls == ERRDOS) &&
2015 (req->rq_err == ERRnofiles))
2016 break;
2017 goto out_free;
2018 }
2019 count = WVAL(req->rq_header, smb_vwv0);
2020 if (count <= 0)
2021 break;
2022
2023 result = -EIO;
2024 bcc = smb_bcc(req->rq_header);
2025 if (bcc != count * SMB_DIRINFO_SIZE + 3)
2026 goto out_free;
2027 p = req->rq_buffer + 3;
2028
2029
2030 /* Make sure the response fits in the buffer. Fixed sized
2031 entries means we don't have to check in the decode loop. */
2032
2033 last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE;
2034
2035 if (last_status + SMB_DIRINFO_SIZE >=
2036 req->rq_buffer + req->rq_bufsize) {
2037 printk(KERN_ERR "smb_proc_readdir_short: "
2038 "last dir entry outside buffer! "
2039 "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status,
2040 req->rq_bufsize, req->rq_buffer);
2041 goto out_free;
2042 }
2043
2044 /* Read the last entry into the status field. */
2045 memcpy(status, last_status, SMB_STATUS_SIZE);
2046
2047
2048 /* Now we are ready to parse smb directory entries. */
2049
2050 for (i = 0; i < count; i++) {
2051 p = smb_decode_short_dirent(server, p,
2052 &qname, &fattr, name_buf);
2053 if (qname.len == 0)
2054 continue;
2055
2056 if (entries_seen == 2 && qname.name[0] == '.') {
2057 if (qname.len == 1)
2058 continue;
2059 if (qname.name[1] == '.' && qname.len == 2)
2060 continue;
2061 }
2062 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2063 &qname, &fattr))
2064 ; /* stop reading? */
2065 entries_seen++;
2066 }
2067 }
2068 result = entries;
2069
2070out_free:
2071 smb_rput(req);
2072out_name:
2073 kfree(name_buf);
2074out:
2075 unlock_kernel();
2076 return result;
2077}
2078
2079static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p)
2080{
2081 u64 size, disk_bytes;
2082
2083 /* FIXME: verify nls support. all is sent as utf8? */
2084
2085 fattr->f_unix = 1;
2086 fattr->f_mode = 0;
2087
2088 /* FIXME: use the uniqueID from the remote instead? */
2089 /* 0 L file size in bytes */
2090 /* 8 L file size on disk in bytes (block count) */
2091 /* 40 L uid */
2092 /* 48 L gid */
2093 /* 56 W file type */
2094 /* 60 L devmajor */
2095 /* 68 L devminor */
2096 /* 76 L unique ID (inode) */
2097 /* 84 L permissions */
2098 /* 92 L link count */
2099
2100 size = LVAL(p, 0);
2101 disk_bytes = LVAL(p, 8);
2102
2103 /*
2104 * Some samba versions round up on-disk byte usage
2105 * to 1MB boundaries, making it useless. When seeing
2106 * that, use the size instead.
2107 */
2108 if (!(disk_bytes & 0xfffff))
2109 disk_bytes = size+511;
2110
2111 fattr->f_size = size;
2112 fattr->f_blocks = disk_bytes >> 9;
2113 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16));
2114 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24));
2115 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32));
2116
2117 if (server->mnt->flags & SMB_MOUNT_UID)
2118 fattr->f_uid = server->mnt->uid;
2119 else
2120 fattr->f_uid = LVAL(p, 40);
2121
2122 if (server->mnt->flags & SMB_MOUNT_GID)
2123 fattr->f_gid = server->mnt->gid;
2124 else
2125 fattr->f_gid = LVAL(p, 48);
2126
2127 fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56));
2128
2129 if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) {
2130 __u64 major = LVAL(p, 60);
2131 __u64 minor = LVAL(p, 68);
2132
2133 fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff);
2134 if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) ||
2135 MINOR(fattr->f_rdev) != (minor & 0xffffffff))
2136 fattr->f_rdev = 0;
2137 }
2138
2139 fattr->f_mode |= LVAL(p, 84);
2140
2141 if ( (server->mnt->flags & SMB_MOUNT_DMODE) &&
2142 (S_ISDIR(fattr->f_mode)) )
2143 fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR;
2144 else if ( (server->mnt->flags & SMB_MOUNT_FMODE) &&
2145 !(S_ISDIR(fattr->f_mode)) )
2146 fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) |
2147 (fattr->f_mode & S_IFMT);
2148
2149}
2150
2151/*
2152 * Interpret a long filename structure using the specified info level:
2153 * level 1 for anything below NT1 protocol
2154 * level 260 for NT1 protocol
2155 *
2156 * qname is filled with the decoded, and possibly translated, name
2157 * fattr receives decoded attributes.
2158 *
2159 * Bugs Noted:
2160 * (1) Win NT 4.0 appends a null byte to names and counts it in the length!
2161 */
2162static char *
2163smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level,
2164 struct qstr *qname, struct smb_fattr *fattr,
2165 unsigned char *name_buf)
2166{
2167 char *result;
2168 unsigned int len = 0;
2169 int n;
2170 __u16 date, time;
2171 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
2172
2173 /*
2174 * SMB doesn't have a concept of inode numbers ...
2175 */
2176 smb_init_dirent(server, fattr);
2177 fattr->f_ino = 0; /* FIXME: do we need this? */
2178
2179 switch (level) {
2180 case 1:
2181 len = *((unsigned char *) p + 22);
2182 qname->name = p + 23;
2183 result = p + 24 + len;
2184
2185 date = WVAL(p, 0);
2186 time = WVAL(p, 2);
2187 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2188 fattr->f_ctime.tv_nsec = 0;
2189
2190 date = WVAL(p, 4);
2191 time = WVAL(p, 6);
2192 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2193 fattr->f_atime.tv_nsec = 0;
2194
2195 date = WVAL(p, 8);
2196 time = WVAL(p, 10);
2197 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2198 fattr->f_mtime.tv_nsec = 0;
2199 fattr->f_size = DVAL(p, 12);
2200 /* ULONG allocation size */
2201 fattr->attr = WVAL(p, 20);
2202
2203 VERBOSE("info 1 at %p, len=%d, name=%.*s\n",
2204 p, len, len, qname->name);
2205 break;
2206 case 260:
2207 result = p + WVAL(p, 0);
2208 len = DVAL(p, 60);
2209 if (len > 255) len = 255;
2210 /* NT4 null terminates, unless we are using unicode ... */
2211 qname->name = p + 94;
2212 if (!unicode && len && qname->name[len-1] == '\0')
2213 len--;
2214
2215 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8));
2216 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16));
2217 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24));
2218 /* change time (32) */
2219 fattr->f_size = LVAL(p, 40);
2220 /* alloc size (48) */
2221 fattr->attr = DVAL(p, 56);
2222
2223 VERBOSE("info 260 at %p, len=%d, name=%.*s\n",
2224 p, len, len, qname->name);
2225 break;
2226 case SMB_FIND_FILE_UNIX:
2227 result = p + WVAL(p, 0);
2228 qname->name = p + 108;
2229
2230 len = strlen(qname->name);
2231 /* FIXME: should we check the length?? */
2232
2233 p += 8;
2234 smb_decode_unix_basic(fattr, server, p);
2235 VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n",
2236 p, len, len, qname->name);
2237 break;
2238 default:
2239 PARANOIA("Unknown info level %d\n", level);
2240 result = p + WVAL(p, 0);
2241 goto out;
2242 }
2243
2244 smb_finish_dirent(server, fattr);
2245
2246#if 0
2247 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
2248 allow the flag to be set anyway. Remove? */
2249 switch (server->opt.case_handling) {
2250 case SMB_CASE_UPPER:
2251 str_upper(qname->name, len);
2252 break;
2253 case SMB_CASE_LOWER:
2254 str_lower(qname->name, len);
2255 break;
2256 default:
2257 break;
2258 }
2259#endif
2260
2261 qname->len = 0;
2262 n = server->ops->convert(name_buf, SMB_MAXNAMELEN,
2263 qname->name, len,
2264 server->remote_nls, server->local_nls);
2265 if (n > 0) {
2266 qname->len = n;
2267 qname->name = name_buf;
2268 }
2269
2270out:
2271 return result;
2272}
2273
2274/* findfirst/findnext flags */
2275#define SMB_CLOSE_AFTER_FIRST (1<<0)
2276#define SMB_CLOSE_IF_END (1<<1)
2277#define SMB_REQUIRE_RESUME_KEY (1<<2)
2278#define SMB_CONTINUE_BIT (1<<3)
2279
2280/*
2281 * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in
2282 * source/libsmb/clilist.c. When looking for smb bugs in the readdir code,
2283 * go there for advise.
2284 *
2285 * Bugs Noted:
2286 * (1) When using Info Level 1 Win NT 4.0 truncates directory listings
2287 * for certain patterns of names and/or lengths. The breakage pattern
2288 * is completely reproducible and can be toggled by the creation of a
2289 * single file. (E.g. echo hi >foo breaks, rm -f foo works.)
2290 */
2291static int
2292smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir,
2293 struct smb_cache_control *ctl)
2294{
2295 struct dentry *dir = filp->f_dentry;
2296 struct smb_sb_info *server = server_from_dentry(dir);
2297 struct qstr qname;
2298 struct smb_fattr fattr;
2299
2300 unsigned char *p, *lastname;
2301 char *mask, *param;
2302 __u16 command;
2303 int first, entries_seen;
2304
2305 /* Both NT and OS/2 accept info level 1 (but see note below). */
2306 int info_level = 260;
2307 const int max_matches = 512;
2308
2309 unsigned int ff_searchcount = 0;
2310 unsigned int ff_eos = 0;
2311 unsigned int ff_lastname = 0;
2312 unsigned int ff_dir_handle = 0;
2313 unsigned int loop_count = 0;
2314 unsigned int mask_len, i;
2315 int result;
2316 struct smb_request *req;
2317 unsigned char *name_buf;
2318 static struct qstr star = {
2319 .name = "*",
2320 .len = 1,
2321 };
2322
2323 lock_kernel();
2324
2325 /*
2326 * We always prefer unix style. Use info level 1 for older
2327 * servers that don't do 260.
2328 */
2329 if (server->opt.capabilities & SMB_CAP_UNIX)
2330 info_level = SMB_FIND_FILE_UNIX;
2331 else if (server->opt.protocol < SMB_PROTOCOL_NT1)
2332 info_level = 1;
2333
2334 result = -ENOMEM;
2335 if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL)))
2336 goto out;
2337 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
2338 goto out_name;
2339 param = req->rq_buffer;
2340
2341 /*
2342 * Encode the initial path
2343 */
2344 mask = param + 12;
2345
2346 result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star);
2347 if (result <= 0)
2348 goto out_free;
2349 mask_len = result - 1; /* mask_len is strlen, not #bytes */
2350 result = 0;
2351 first = 1;
2352 VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask);
2353
2354 entries_seen = 2;
2355 ff_eos = 0;
2356
2357 while (ff_eos == 0) {
2358 loop_count += 1;
2359 if (loop_count > 10) {
2360 printk(KERN_WARNING "smb_proc_readdir_long: "
2361 "Looping in FIND_NEXT??\n");
2362 result = -EIO;
2363 break;
2364 }
2365
2366 if (first != 0) {
2367 command = TRANSACT2_FINDFIRST;
2368 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2369 WSET(param, 2, max_matches); /* max count */
2370 WSET(param, 4, SMB_CLOSE_IF_END);
2371 WSET(param, 6, info_level);
2372 DSET(param, 8, 0);
2373 } else {
2374 command = TRANSACT2_FINDNEXT;
2375
2376 VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n",
2377 ff_dir_handle, ff_lastname, mask_len, mask);
2378
2379 WSET(param, 0, ff_dir_handle); /* search handle */
2380 WSET(param, 2, max_matches); /* max count */
2381 WSET(param, 4, info_level);
2382 DSET(param, 6, 0);
2383 WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END);
2384 }
2385
2386 req->rq_trans2_command = command;
2387 req->rq_ldata = 0;
2388 req->rq_data = NULL;
2389 req->rq_lparm = 12 + mask_len + 1;
2390 req->rq_parm = param;
2391 req->rq_flags = 0;
2392 result = smb_add_request(req);
2393 if (result < 0) {
2394 PARANOIA("error=%d, breaking\n", result);
2395 break;
2396 }
2397
2398 if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
2399 /* a damn Win95 bug - sometimes it clags if you
2400 ask it too fast */
041e0e3b 2401 schedule_timeout_interruptible(msecs_to_jiffies(200));
1da177e4
LT		 2402 continue;
2403 }
2404
2405 if (req->rq_rcls != 0) {
2406 result = smb_errno(req);
2407 PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n",
2408 mask, result, req->rq_rcls, req->rq_err);
2409 break;
2410 }
2411
2412 /* parse out some important return info */
2413 if (first != 0) {
2414 ff_dir_handle = WVAL(req->rq_parm, 0);
2415 ff_searchcount = WVAL(req->rq_parm, 2);
2416 ff_eos = WVAL(req->rq_parm, 4);
2417 ff_lastname = WVAL(req->rq_parm, 8);
2418 } else {
2419 ff_searchcount = WVAL(req->rq_parm, 0);
2420 ff_eos = WVAL(req->rq_parm, 2);
2421 ff_lastname = WVAL(req->rq_parm, 6);
2422 }
2423
2424 if (ff_searchcount == 0)
2425 break;
2426
2427 /* Now we are ready to parse smb directory entries. */
2428
2429 /* point to the data bytes */
2430 p = req->rq_data;
2431 for (i = 0; i < ff_searchcount; i++) {
2432 /* make sure we stay within the buffer */
2433 if (p >= req->rq_data + req->rq_ldata) {
2434 printk(KERN_ERR "smb_proc_readdir_long: "
2435 "dirent pointer outside buffer! "
2436 "%p %d@%p\n",
2437 p, req->rq_ldata, req->rq_data);
2438 result = -EIO; /* always a comm. error? */
2439 goto out_free;
2440 }
2441
2442 p = smb_decode_long_dirent(server, p, info_level,
2443 &qname, &fattr, name_buf);
2444
2445 /* ignore . and .. from the server */
2446 if (entries_seen == 2 && qname.name[0] == '.') {
2447 if (qname.len == 1)
2448 continue;
2449 if (qname.name[1] == '.' && qname.len == 2)
2450 continue;
2451 }
2452
2453 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2454 &qname, &fattr))
2455 ; /* stop reading? */
2456 entries_seen++;
2457 }
2458
2459 VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos);
2460
2461 /*
2462 * We might need the lastname for continuations.
2463 *
2464 * Note that some servers (win95?) point to the filename and
2465 * others (NT4, Samba using NT1) to the dir entry. We assume
2466 * here that those who do not point to a filename do not need
2467 * this info to continue the listing.
2468 *
2469 * OS/2 needs this and talks infolevel 1.
2470 * NetApps want lastname with infolevel 260.
2471 * win2k want lastname with infolevel 260, and points to
2472 * the record not to the name.
2473 * Samba+CifsUnixExt doesn't need lastname.
2474 *
2475 * Both are happy if we return the data they point to. So we do.
2476 * (FIXME: above is not true with win2k)
2477 */
2478 mask_len = 0;
2479 if (info_level != SMB_FIND_FILE_UNIX &&
2480 ff_lastname > 0 && ff_lastname < req->rq_ldata) {
2481 lastname = req->rq_data + ff_lastname;
2482
2483 switch (info_level) {
2484 case 260:
2485 mask_len = req->rq_ldata - ff_lastname;
2486 break;
2487 case 1:
2488 /* lastname points to a length byte */
2489 mask_len = *lastname++;
2490 if (ff_lastname + 1 + mask_len > req->rq_ldata)
2491 mask_len = req->rq_ldata - ff_lastname - 1;
2492 break;
2493 }
2494
2495 /*
2496 * Update the mask string for the next message.
2497 */
2498 if (mask_len > 255)
2499 mask_len = 255;
2500 if (mask_len)
2501 strncpy(mask, lastname, mask_len);
2502 }
2503 mask_len = strnlen(mask, mask_len);
2504 VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n",
2505 mask_len, ff_lastname, req->rq_ldata, mask_len, mask);
2506
2507 first = 0;
2508 loop_count = 0;
2509 }
2510
2511out_free:
2512 smb_rput(req);
2513out_name:
2514 kfree(name_buf);
2515out:
2516 unlock_kernel();
2517 return result;
2518}
2519
2520/*
2521 * This version uses the trans2 TRANSACT2_FINDFIRST message
2522 * to get the attribute data.
2523 *
2524 * Bugs Noted:
2525 */
2526static int
2527smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
2528 struct smb_fattr *fattr)
2529{
2530 char *param, *mask;
2531 __u16 date, time;
2532 int mask_len, result;
2533 struct smb_request *req;
2534
2535 result = -ENOMEM;
2536 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2537 goto out;
2538 param = req->rq_buffer;
2539 mask = param + 12;
2540
2541 mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL);
2542 if (mask_len < 0) {
2543 result = mask_len;
2544 goto out_free;
2545 }
2546 VERBOSE("name=%s, len=%d\n", mask, mask_len);
2547 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2548 WSET(param, 2, 1); /* max count */
2549 WSET(param, 4, 1); /* close after this call */
2550 WSET(param, 6, 1); /* info_level */
2551 DSET(param, 8, 0);
2552
2553 req->rq_trans2_command = TRANSACT2_FINDFIRST;
2554 req->rq_ldata = 0;
2555 req->rq_data = NULL;
2556 req->rq_lparm = 12 + mask_len;
2557 req->rq_parm = param;
2558 req->rq_flags = 0;
2559 result = smb_add_request(req);
2560 if (result < 0)
2561 goto out_free;
2562 if (req->rq_rcls != 0) {
2563 result = smb_errno(req);
2564#ifdef SMBFS_PARANOIA
2565 if (result != -ENOENT)
2566 PARANOIA("error for %s, rcls=%d, err=%d\n",
2567 mask, req->rq_rcls, req->rq_err);
2568#endif
2569 goto out_free;
2570 }
2571 /* Make sure we got enough data ... */
2572 result = -EINVAL;
2573 if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) {
2574 PARANOIA("bad result for %s, len=%d, count=%d\n",
2575 mask, req->rq_ldata, WVAL(req->rq_parm, 2));
2576 goto out_free;
2577 }
2578
2579 /*
2580 * Decode the response into the fattr ...
2581 */
2582 date = WVAL(req->rq_data, 0);
2583 time = WVAL(req->rq_data, 2);
2584 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2585 fattr->f_ctime.tv_nsec = 0;
2586
2587 date = WVAL(req->rq_data, 4);
2588 time = WVAL(req->rq_data, 6);
2589 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2590 fattr->f_atime.tv_nsec = 0;
2591
2592 date = WVAL(req->rq_data, 8);
2593 time = WVAL(req->rq_data, 10);
2594 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2595 fattr->f_mtime.tv_nsec = 0;
2596 VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
2597 mask, date, time, fattr->f_mtime);
2598 fattr->f_size = DVAL(req->rq_data, 12);
2599 /* ULONG allocation size */
2600 fattr->attr = WVAL(req->rq_data, 20);
2601 result = 0;
2602
2603out_free:
2604 smb_rput(req);
2605out:
2606 return result;
2607}
2608
2609static int
2610smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
2611 struct smb_fattr *fattr)
2612{
2613 int result;
2614 char *p;
2615 struct smb_request *req;
2616
2617 result = -ENOMEM;
2618 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2619 goto out;
2620
2621 p = smb_setup_header(req, SMBgetatr, 0, 0);
2622 result = smb_simple_encode_path(req, &p, dir, NULL);
2623 if (result < 0)
2624 goto out_free;
2625 smb_setup_bcc(req, p);
2626
2627 if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0)
2628 goto out_free;
2629 fattr->attr = WVAL(req->rq_header, smb_vwv0);
2630 fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1));
2631 fattr->f_mtime.tv_nsec = 0;
2632 fattr->f_size = DVAL(req->rq_header, smb_vwv3);
2633 fattr->f_ctime = fattr->f_mtime;
2634 fattr->f_atime = fattr->f_mtime;
2635#ifdef SMBFS_DEBUG_TIMESTAMP
2636 printk("getattr_core: %s/%s, mtime=%ld\n",
2637 DENTRY_PATH(dir), fattr->f_mtime);
2638#endif
2639 result = 0;
2640
2641out_free:
2642 smb_rput(req);
2643out:
2644 return result;
2645}
2646
2647/*
2648 * Bugs Noted:
2649 * (1) Win 95 swaps the date and time fields in the standard info level.
2650 */
2651static int
2652smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir,
2653 struct smb_request *req, int infolevel)
2654{
2655 char *p, *param;
2656 int result;
2657
2658 param = req->rq_buffer;
2659 WSET(param, 0, infolevel);
2660 DSET(param, 2, 0);
2661 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
2662 if (result < 0)
2663 goto out;
2664 p = param + 6 + result;
2665
2666 req->rq_trans2_command = TRANSACT2_QPATHINFO;
2667 req->rq_ldata = 0;
2668 req->rq_data = NULL;
2669 req->rq_lparm = p - param;
2670 req->rq_parm = param;
2671 req->rq_flags = 0;
2672 result = smb_add_request(req);
2673 if (result < 0)
2674 goto out;
2675 if (req->rq_rcls != 0) {
2676 VERBOSE("for %s: result=%d, rcls=%d, err=%d\n",
2677 &param[6], result, req->rq_rcls, req->rq_err);
2678 result = smb_errno(req);
2679 goto out;
2680 }
2681 result = -ENOENT;
2682 if (req->rq_ldata < 22) {
2683 PARANOIA("not enough data for %s, len=%d\n",
2684 &param[6], req->rq_ldata);
2685 goto out;
2686 }
2687
2688 result = 0;
2689out:
2690 return result;
2691}
2692
2693static int
2694smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir,
2695 struct smb_fattr *attr)
2696{
2697 u16 date, time;
2698 int off_date = 0, off_time = 2;
2699 int result;
2700 struct smb_request *req;
2701
2702 result = -ENOMEM;
2703 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2704 goto out;
2705
2706 result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD);
2707 if (result < 0)
2708 goto out_free;
2709
2710 /*
2711 * Kludge alert: Win 95 swaps the date and time field,
2712 * contrary to the CIFS docs and Win NT practice.
2713 */
2714 if (server->mnt->flags & SMB_MOUNT_WIN95) {
2715 off_date = 2;
2716 off_time = 0;
2717 }
2718 date = WVAL(req->rq_data, off_date);
2719 time = WVAL(req->rq_data, off_time);
2720 attr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2721 attr->f_ctime.tv_nsec = 0;
2722
2723 date = WVAL(req->rq_data, 4 + off_date);
2724 time = WVAL(req->rq_data, 4 + off_time);
2725 attr->f_atime.tv_sec = date_dos2unix(server, date, time);
2726 attr->f_atime.tv_nsec = 0;
2727
2728 date = WVAL(req->rq_data, 8 + off_date);
2729 time = WVAL(req->rq_data, 8 + off_time);
2730 attr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2731 attr->f_mtime.tv_nsec = 0;
2732#ifdef SMBFS_DEBUG_TIMESTAMP
2733 printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
2734 DENTRY_PATH(dir), date, time, attr->f_mtime);
2735#endif
2736 attr->f_size = DVAL(req->rq_data, 12);
2737 attr->attr = WVAL(req->rq_data, 20);
2738
2739out_free:
2740 smb_rput(req);
2741out:
2742 return result;
2743}
2744
2745static int
2746smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir,
2747 struct smb_fattr *attr)
2748{
2749 struct smb_request *req;
2750 int result;
2751
2752 result = -ENOMEM;
2753 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2754 goto out;
2755
2756 result = smb_proc_getattr_trans2(server, dir, req,
2757 SMB_QUERY_FILE_ALL_INFO);
2758 if (result < 0)
2759 goto out_free;
2760
2761 attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0));
2762 attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8));
2763 attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16));
2764 /* change (24) */
2765 attr->attr = WVAL(req->rq_data, 32);
2766 /* pad? (34) */
2767 /* allocated size (40) */
2768 attr->f_size = LVAL(req->rq_data, 48);
2769
2770out_free:
2771 smb_rput(req);
2772out:
2773 return result;
2774}
2775
2776static int
2777smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir,
2778 struct smb_fattr *attr)
2779{
2780 struct smb_request *req;
2781 int result;
2782
2783 result = -ENOMEM;
2784 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2785 goto out;
2786
2787 result = smb_proc_getattr_trans2(server, dir, req,
2788 SMB_QUERY_FILE_UNIX_BASIC);
2789 if (result < 0)
2790 goto out_free;
2791
2792 smb_decode_unix_basic(attr, server, req->rq_data);
2793
2794out_free:
2795 smb_rput(req);
2796out:
2797 return result;
2798}
2799
2800static int
2801smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir,
2802 struct smb_fattr *attr)
2803{
2804 struct inode *inode = dir->d_inode;
2805 int result;
2806
2807 /* FIXME: why not use the "all" version? */
2808 result = smb_proc_getattr_trans2_std(server, dir, attr);
2809 if (result < 0)
2810 goto out;
2811
2812 /*
2813 * None of the getattr versions here can make win9x return the right
2814 * filesize if there are changes made to an open file.
2815 * A seek-to-end does return the right size, but we only need to do
2816 * that on files we have written.
2817 */
2818 if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE &&
2819 smb_is_open(inode))
2820 {
2821 __u16 fileid = SMB_I(inode)->fileid;
2822 attr->f_size = smb_proc_seek(server, fileid, 2, 0);
2823 }
2824
2825out:
2826 return result;
2827}
2828
2829static int
2830smb_proc_ops_wait(struct smb_sb_info *server)
2831{
2832 int result;
2833
2834 result = wait_event_interruptible_timeout(server->conn_wq,
2835 server->conn_complete, 30*HZ);
2836
2837 if (!result || signal_pending(current))
2838 return -EIO;
2839
2840 return 0;
2841}
2842
2843static int
2844smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir,
2845 struct smb_fattr *fattr)
2846{
2847 int result;
2848
2849 if (smb_proc_ops_wait(server) < 0)
2850 return -EIO;
2851
2852 smb_init_dirent(server, fattr);
2853 result = server->ops->getattr(server, dir, fattr);
2854 smb_finish_dirent(server, fattr);
2855
2856 return result;
2857}
2858
2859static int
2860smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir,
2861 struct smb_cache_control *ctl)
2862{
2863 struct smb_sb_info *server = server_from_dentry(filp->f_dentry);
2864
2865 if (smb_proc_ops_wait(server) < 0)
2866 return -EIO;
2867
2868 return server->ops->readdir(filp, dirent, filldir, ctl);
2869}
2870
2871int
2872smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
2873{
2874 struct smb_sb_info *server = server_from_dentry(dir);
2875 int result;
2876
2877 smb_init_dirent(server, fattr);
2878 result = server->ops->getattr(server, dir, fattr);
2879 smb_finish_dirent(server, fattr);
2880
2881 return result;
2882}
2883
2884
2885/*
2886 * Because of bugs in the core protocol, we use this only to set
2887 * attributes. See smb_proc_settime() below for timestamp handling.
2888 *
2889 * Bugs Noted:
2890 * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail
2891 * with an undocumented error (ERRDOS code 50). Setting
2892 * mtime to 0 allows the attributes to be set.
2893 * (2) The extra parameters following the name string aren't
2894 * in the CIFS docs, but seem to be necessary for operation.
2895 */
2896static int
2897smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
2898 __u16 attr)
2899{
2900 char *p;
2901 int result;
2902 struct smb_request *req;
2903
2904 result = -ENOMEM;
2905 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2906 goto out;
2907
2908 p = smb_setup_header(req, SMBsetatr, 8, 0);
2909 WSET(req->rq_header, smb_vwv0, attr);
2910 DSET(req->rq_header, smb_vwv1, 0); /* mtime */
2911 WSET(req->rq_header, smb_vwv3, 0); /* reserved values */
2912 WSET(req->rq_header, smb_vwv4, 0);
2913 WSET(req->rq_header, smb_vwv5, 0);
2914 WSET(req->rq_header, smb_vwv6, 0);
2915 WSET(req->rq_header, smb_vwv7, 0);
2916 result = smb_simple_encode_path(req, &p, dentry, NULL);
2917 if (result < 0)
2918 goto out_free;
2919 if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) {
2920 result = -ENAMETOOLONG;
2921 goto out_free;
2922 }
2923 *p++ = 4;
2924 *p++ = 0;
2925 smb_setup_bcc(req, p);
2926
2927 result = smb_request_ok(req, SMBsetatr, 0, 0);
2928 if (result < 0)
2929 goto out_free;
2930 result = 0;
2931
2932out_free:
2933 smb_rput(req);
2934out:
2935 return result;
2936}
2937
2938/*
2939 * Because of bugs in the trans2 setattr messages, we must set
2940 * attributes and timestamps separately. The core SMBsetatr
2941 * message seems to be the only reliable way to set attributes.
2942 */
2943int
2944smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr)
2945{
2946 struct smb_sb_info *server = server_from_dentry(dir);
2947 int result;
2948
2949 VERBOSE("setting %s/%s, open=%d\n",
2950 DENTRY_PATH(dir), smb_is_open(dir->d_inode));
2951 result = smb_proc_setattr_core(server, dir, fattr->attr);
2952 return result;
2953}
2954
2955/*
2956 * Sets the timestamps for an file open with write permissions.
2957 */
2958static int
2959smb_proc_setattr_ext(struct smb_sb_info *server,
2960 struct inode *inode, struct smb_fattr *fattr)
2961{
2962 __u16 date, time;
2963 int result;
2964 struct smb_request *req;
2965
2966 result = -ENOMEM;
2967 if (! (req = smb_alloc_request(server, 0)))
2968 goto out;
2969
2970 smb_setup_header(req, SMBsetattrE, 7, 0);
2971 WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid);
2972 /* We don't change the creation time */
2973 WSET(req->rq_header, smb_vwv1, 0);
2974 WSET(req->rq_header, smb_vwv2, 0);
2975 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
2976 WSET(req->rq_header, smb_vwv3, date);
2977 WSET(req->rq_header, smb_vwv4, time);
2978 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
2979 WSET(req->rq_header, smb_vwv5, date);
2980 WSET(req->rq_header, smb_vwv6, time);
2981#ifdef SMBFS_DEBUG_TIMESTAMP
2982 printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n",
2983 date, time, fattr->f_mtime);
2984#endif
2985
2986 req->rq_flags |= SMB_REQ_NORETRY;
2987 result = smb_request_ok(req, SMBsetattrE, 0, 0);
2988 if (result < 0)
2989 goto out_free;
2990 result = 0;
2991out_free:
2992 smb_rput(req);
2993out:
2994 return result;
2995}
2996
2997/*
2998 * Bugs Noted:
2999 * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't
3000 * set the file's attribute flags.
3001 */
3002static int
3003smb_proc_setattr_trans2(struct smb_sb_info *server,
3004 struct dentry *dir, struct smb_fattr *fattr)
3005{
3006 __u16 date, time;
3007 char *p, *param;
3008 int result;
3009 char data[26];
3010 struct smb_request *req;
3011
3012 result = -ENOMEM;
3013 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3014 goto out;
3015 param = req->rq_buffer;
3016
3017 WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */
3018 DSET(param, 2, 0);
3019 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
3020 if (result < 0)
3021 goto out_free;
3022 p = param + 6 + result;
3023
3024 WSET(data, 0, 0); /* creation time */
3025 WSET(data, 2, 0);
3026 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
3027 WSET(data, 4, date);
3028 WSET(data, 6, time);
3029 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
3030 WSET(data, 8, date);
3031 WSET(data, 10, time);
3032#ifdef SMBFS_DEBUG_TIMESTAMP
3033 printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
3034 DENTRY_PATH(dir), date, time, fattr->f_mtime);
3035#endif
3036 DSET(data, 12, 0); /* size */
3037 DSET(data, 16, 0); /* blksize */
3038 WSET(data, 20, 0); /* attr */
3039 DSET(data, 22, 0); /* ULONG EA size */
3040
3041 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3042 req->rq_ldata = 26;
3043 req->rq_data = data;
3044 req->rq_lparm = p - param;
3045 req->rq_parm = param;
3046 req->rq_flags = 0;
3047 result = smb_add_request(req);
3048 if (result < 0)
3049 goto out_free;
3050 result = 0;
3051 if (req->rq_rcls != 0)
3052 result = smb_errno(req);
3053
3054out_free:
3055 smb_rput(req);
3056out:
3057 return result;
3058}
3059
3060/*
3061 * ATTR_MODE 0x001
3062 * ATTR_UID 0x002
3063 * ATTR_GID 0x004
3064 * ATTR_SIZE 0x008
3065 * ATTR_ATIME 0x010
3066 * ATTR_MTIME 0x020
3067 * ATTR_CTIME 0x040
3068 * ATTR_ATIME_SET 0x080
3069 * ATTR_MTIME_SET 0x100
3070 * ATTR_FORCE 0x200
3071 * ATTR_ATTR_FLAG 0x400
3072 *
3073 * major/minor should only be set by mknod.
3074 */
3075int
3076smb_proc_setattr_unix(struct dentry *d, struct iattr *attr,
3077 unsigned int major, unsigned int minor)
3078{
3079 struct smb_sb_info *server = server_from_dentry(d);
3080 u64 nttime;
3081 char *p, *param;
3082 int result;
3083 char data[100];
3084 struct smb_request *req;
3085
3086 result = -ENOMEM;
3087 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3088 goto out;
3089 param = req->rq_buffer;
3090
3091 DEBUG1("valid flags = 0x%04x\n", attr->ia_valid);
3092
3093 WSET(param, 0, SMB_SET_FILE_UNIX_BASIC);
3094 DSET(param, 2, 0);
3095 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3096 if (result < 0)
3097 goto out_free;
3098 p = param + 6 + result;
3099
3100 /* 0 L file size in bytes */
3101 /* 8 L file size on disk in bytes (block count) */
3102 /* 40 L uid */
3103 /* 48 L gid */
3104 /* 56 W file type enum */
3105 /* 60 L devmajor */
3106 /* 68 L devminor */
3107 /* 76 L unique ID (inode) */
3108 /* 84 L permissions */
3109 /* 92 L link count */
3110 LSET(data, 0, SMB_SIZE_NO_CHANGE);
3111 LSET(data, 8, SMB_SIZE_NO_CHANGE);
3112 LSET(data, 16, SMB_TIME_NO_CHANGE);
3113 LSET(data, 24, SMB_TIME_NO_CHANGE);
3114 LSET(data, 32, SMB_TIME_NO_CHANGE);
3115 LSET(data, 40, SMB_UID_NO_CHANGE);
3116 LSET(data, 48, SMB_GID_NO_CHANGE);
ac34dd05 3117 DSET(data, 56, smb_filetype_from_mode(attr->ia_mode));
1da177e4
LT		 3118 LSET(data, 60, major);
3119 LSET(data, 68, minor);
3120 LSET(data, 76, 0);
3121 LSET(data, 84, SMB_MODE_NO_CHANGE);
3122 LSET(data, 92, 0);
3123
3124 if (attr->ia_valid & ATTR_SIZE) {
3125 LSET(data, 0, attr->ia_size);
3126 LSET(data, 8, 0); /* can't set anyway */
3127 }
3128
3129 /*
3130 * FIXME: check the conversion function it the correct one
3131 *
3132 * we can't set ctime but we might as well pass this to the server
3133 * and let it ignore it.
3134 */
3135 if (attr->ia_valid & ATTR_CTIME) {
3136 nttime = smb_unixutc2ntutc(attr->ia_ctime);
3137 LSET(data, 16, nttime);
3138 }
3139 if (attr->ia_valid & ATTR_ATIME) {
3140 nttime = smb_unixutc2ntutc(attr->ia_atime);
3141 LSET(data, 24, nttime);
3142 }
3143 if (attr->ia_valid & ATTR_MTIME) {
3144 nttime = smb_unixutc2ntutc(attr->ia_mtime);
3145 LSET(data, 32, nttime);
3146 }
3147
3148 if (attr->ia_valid & ATTR_UID) {
3149 LSET(data, 40, attr->ia_uid);
3150 }
3151 if (attr->ia_valid & ATTR_GID) {
3152 LSET(data, 48, attr->ia_gid);
3153 }
3154
3155 if (attr->ia_valid & ATTR_MODE) {
3156 LSET(data, 84, attr->ia_mode);
3157 }
3158
3159 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3160 req->rq_ldata = 100;
3161 req->rq_data = data;
3162 req->rq_lparm = p - param;
3163 req->rq_parm = param;
3164 req->rq_flags = 0;
3165 result = smb_add_request(req);
3166
3167out_free:
3168 smb_rput(req);
3169out:
3170 return result;
3171}
3172
3173
3174/*
3175 * Set the modify and access timestamps for a file.
3176 *
3177 * Incredibly enough, in all of SMB there is no message to allow
3178 * setting both attributes and timestamps at once.
3179 *
3180 * Bugs Noted:
3181 * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message
3182 * with info level 1 (INFO_STANDARD).
3183 * (2) Win 95 seems not to support setting directory timestamps.
3184 * (3) Under the core protocol apparently the only way to set the
3185 * timestamp is to open and close the file.
3186 */
3187int
3188smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
3189{
3190 struct smb_sb_info *server = server_from_dentry(dentry);
3191 struct inode *inode = dentry->d_inode;
3192 int result;
3193
3194 VERBOSE("setting %s/%s, open=%d\n",
3195 DENTRY_PATH(dentry), smb_is_open(inode));
3196
3197 /* setting the time on a Win95 server fails (tridge) */
3198 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 &&
3199 !(server->mnt->flags & SMB_MOUNT_WIN95)) {
3200 if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY)
3201 result = smb_proc_setattr_ext(server, inode, fattr);
3202 else
3203 result = smb_proc_setattr_trans2(server, dentry, fattr);
3204 } else {
3205 /*
3206 * Fail silently on directories ... timestamp can't be set?
3207 */
3208 result = 0;
3209 if (S_ISREG(inode->i_mode)) {
3210 /*
3211 * Set the mtime by opening and closing the file.
3212 * Note that the file is opened read-only, but this
3213 * still allows us to set the date (tridge)
3214 */
3215 result = -EACCES;
3216 if (!smb_is_open(inode))
3217 smb_proc_open(server, dentry, SMB_O_RDONLY);
3218 if (smb_is_open(inode)) {
3219 inode->i_mtime = fattr->f_mtime;
3220 result = smb_proc_close_inode(server, inode);
3221 }
3222 }
3223 }
3224
3225 return result;
3226}
3227
3228int
3229smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr)
3230{
3231 struct smb_sb_info *server = SMB_SB(sb);
3232 int result;
3233 char *p;
3234 long unit;
3235 struct smb_request *req;
3236
3237 result = -ENOMEM;
3238 if (! (req = smb_alloc_request(server, 0)))
3239 goto out;
3240
3241 smb_setup_header(req, SMBdskattr, 0, 0);
3242 if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0)
3243 goto out_free;
3244 p = SMB_VWV(req->rq_header);
3245 unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT;
3246 attr->f_blocks = WVAL(p, 0) * unit;
3247 attr->f_bsize = SMB_ST_BLKSIZE;
3248 attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit;
3249 result = 0;
3250
3251out_free:
3252 smb_rput(req);
3253out:
3254 return result;
3255}
3256
3257int
3258smb_proc_read_link(struct smb_sb_info *server, struct dentry *d,
3259 char *buffer, int len)
3260{
3261 char *p, *param;
3262 int result;
3263 struct smb_request *req;
3264
3265 DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d));
3266
3267 result = -ENOMEM;
3268 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3269 goto out;
3270 param = req->rq_buffer;
3271
3272 WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK);
3273 DSET(param, 2, 0);
3274 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3275 if (result < 0)
3276 goto out_free;
3277 p = param + 6 + result;
3278
3279 req->rq_trans2_command = TRANSACT2_QPATHINFO;
3280 req->rq_ldata = 0;
3281 req->rq_data = NULL;
3282 req->rq_lparm = p - param;
3283 req->rq_parm = param;
3284 req->rq_flags = 0;
3285 result = smb_add_request(req);
3286 if (result < 0)
3287 goto out_free;
3288 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3289 &param[6], result, req->rq_rcls, req->rq_err);
3290
3291 /* copy data up to the \0 or buffer length */
3292 result = len;
3293 if (req->rq_ldata < len)
3294 result = req->rq_ldata;
3295 strncpy(buffer, req->rq_data, result);
3296
3297out_free:
3298 smb_rput(req);
3299out:
3300 return result;
3301}
3302
3303
3304/*
3305 * Create a symlink object called dentry which points to oldpath.
3306 * Samba does not permit dangling links but returns a suitable error message.
3307 */
3308int
3309smb_proc_symlink(struct smb_sb_info *server, struct dentry *d,
3310 const char *oldpath)
3311{
3312 char *p, *param;
3313 int result;
3314 struct smb_request *req;
3315
3316 result = -ENOMEM;
3317 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3318 goto out;
3319 param = req->rq_buffer;
3320
3321 WSET(param, 0, SMB_SET_FILE_UNIX_LINK);
3322 DSET(param, 2, 0);
3323 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL);
3324 if (result < 0)
3325 goto out_free;
3326 p = param + 6 + result;
3327
3328 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3329 req->rq_ldata = strlen(oldpath) + 1;
3330 req->rq_data = (char *) oldpath;
3331 req->rq_lparm = p - param;
3332 req->rq_parm = param;
3333 req->rq_flags = 0;
3334 result = smb_add_request(req);
3335 if (result < 0)
3336 goto out_free;
3337
3338 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3339 &param[6], result, req->rq_rcls, req->rq_err);
3340 result = 0;
3341
3342out_free:
3343 smb_rput(req);
3344out:
3345 return result;
3346}
3347
3348/*
3349 * Create a hard link object called new_dentry which points to dentry.
3350 */
3351int
3352smb_proc_link(struct smb_sb_info *server, struct dentry *dentry,
3353 struct dentry *new_dentry)
3354{
3355 char *p, *param;
3356 int result;
3357 struct smb_request *req;
3358
3359 result = -ENOMEM;
3360 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3361 goto out;
3362 param = req->rq_buffer;
3363
3364 WSET(param, 0, SMB_SET_FILE_UNIX_HLINK);
3365 DSET(param, 2, 0);
3366 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1,
3367 new_dentry, NULL);
3368 if (result < 0)
3369 goto out_free;
3370 p = param + 6 + result;
3371
3372 /* Grr, pointless separation of parameters and data ... */
3373 req->rq_data = p;
3374 req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1,
3375 dentry, NULL);
3376
3377 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3378 req->rq_lparm = p - param;
3379 req->rq_parm = param;
3380 req->rq_flags = 0;
3381 result = smb_add_request(req);
3382 if (result < 0)
3383 goto out_free;
3384
3385 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3386 &param[6], result, req->rq_rcls, req->rq_err);
3387 result = 0;
3388
3389out_free:
3390 smb_rput(req);
3391out:
3392 return result;
3393}
3394
3395static int
3396smb_proc_query_cifsunix(struct smb_sb_info *server)
3397{
3398 int result;
3399 int major, minor;
3400 u64 caps;
3401 char param[2];
3402 struct smb_request *req;
3403
3404 result = -ENOMEM;
3405 if (! (req = smb_alloc_request(server, 100)))
3406 goto out;
3407
3408 WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO);
3409
3410 req->rq_trans2_command = TRANSACT2_QFSINFO;
3411 req->rq_ldata = 0;
3412 req->rq_data = NULL;
3413 req->rq_lparm = 2;
3414 req->rq_parm = param;
3415 req->rq_flags = 0;
3416 result = smb_add_request(req);
3417 if (result < 0)
3418 goto out_free;
3419
3420 if (req->rq_ldata < 12) {
3421 PARANOIA("Not enough data\n");
3422 goto out_free;
3423 }
3424 major = WVAL(req->rq_data, 0);
3425 minor = WVAL(req->rq_data, 2);
3426
3427 DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n",
3428 major, minor);
3429 /* FIXME: verify that we are ok with this major/minor? */
3430
3431 caps = LVAL(req->rq_data, 4);
3432 DEBUG1("Server capabilities 0x%016llx\n", caps);
3433
3434out_free:
3435 smb_rput(req);
3436out:
3437 return result;
3438}
3439
3440
3441static void
3442install_ops(struct smb_ops *dst, struct smb_ops *src)
3443{
3444 memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC);
3445}
3446
3447/* < LANMAN2 */
3448static struct smb_ops smb_ops_core =
3449{
3450 .read = smb_proc_read,
3451 .write = smb_proc_write,
3452 .readdir = smb_proc_readdir_short,
3453 .getattr = smb_proc_getattr_core,
3454 .truncate = smb_proc_trunc32,
3455};
3456
3457/* LANMAN2, OS/2, others? */
3458static struct smb_ops smb_ops_os2 =
3459{
3460 .read = smb_proc_read,
3461 .write = smb_proc_write,
3462 .readdir = smb_proc_readdir_long,
3463 .getattr = smb_proc_getattr_trans2_std,
3464 .truncate = smb_proc_trunc32,
3465};
3466
3467/* Win95, and possibly some NetApp versions too */
3468static struct smb_ops smb_ops_win95 =
3469{
3470 .read = smb_proc_read, /* does not support 12word readX */
3471 .write = smb_proc_write,
3472 .readdir = smb_proc_readdir_long,
3473 .getattr = smb_proc_getattr_95,
3474 .truncate = smb_proc_trunc95,
3475};
3476
3477/* Samba, NT4 and NT5 */
3478static struct smb_ops smb_ops_winNT =
3479{
3480 .read = smb_proc_readX,
3481 .write = smb_proc_writeX,
3482 .readdir = smb_proc_readdir_long,
3483 .getattr = smb_proc_getattr_trans2_all,
3484 .truncate = smb_proc_trunc64,
3485};
3486
3487/* Samba w/ unix extensions. Others? */
3488static struct smb_ops smb_ops_unix =
3489{
3490 .read = smb_proc_readX,
3491 .write = smb_proc_writeX,
3492 .readdir = smb_proc_readdir_long,
3493 .getattr = smb_proc_getattr_unix,
3494 /* FIXME: core/ext/time setattr needs to be cleaned up! */
3495 /* .setattr = smb_proc_setattr_unix, */
3496 .truncate = smb_proc_trunc64,
3497};
3498
3499/* Place holder until real ops are in place */
3500static struct smb_ops smb_ops_null =
3501{
3502 .readdir = smb_proc_readdir_null,
3503 .getattr = smb_proc_getattr_null,
3504};
3505
3506void smb_install_null_ops(struct smb_ops *ops)
3507{
3508 install_ops(ops, &smb_ops_null);
3509}
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