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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>
1da177e4
LT		 19#include <linux/nls.h>
20#include <linux/smp_lock.h>
21#include <linux/net.h>
22#include <linux/vfs.h>
23#include <linux/smb_fs.h>
24#include <linux/smbno.h>
25#include <linux/smb_mount.h>
26
27#include <net/sock.h>
28
29#include <asm/string.h>
30#include <asm/div64.h>
31
32#include "smb_debug.h"
33#include "proto.h"
34#include "request.h"
35
36
37/* Features. Undefine if they cause problems, this should perhaps be a
38 config option. */
39#define SMBFS_POSIX_UNLINK 1
40
41/* Allow smb_retry to be interrupted. */
42#define SMB_RETRY_INTR
43
44#define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN)
45#define SMB_CMD(packet) (*(packet+8))
46#define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1))
47
48#define SMB_DIRINFO_SIZE 43
49#define SMB_STATUS_SIZE 21
50
51#define SMB_ST_BLKSIZE (PAGE_SIZE)
52#define SMB_ST_BLKSHIFT (PAGE_SHIFT)
53
54static struct smb_ops smb_ops_core;
55static struct smb_ops smb_ops_os2;
56static struct smb_ops smb_ops_win95;
57static struct smb_ops smb_ops_winNT;
58static struct smb_ops smb_ops_unix;
59static struct smb_ops smb_ops_null;
60
61static void
62smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
63static void
64smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
65static int
66smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
67 struct smb_fattr *fattr);
68static int
69smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
70 struct smb_fattr *fattr);
71static int
72smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
73 u16 attr);
74static int
75smb_proc_setattr_ext(struct smb_sb_info *server,
76 struct inode *inode, struct smb_fattr *fattr);
77static int
78smb_proc_query_cifsunix(struct smb_sb_info *server);
79static void
80install_ops(struct smb_ops *dst, struct smb_ops *src);
81
82
83static void
84str_upper(char *name, int len)
85{
86 while (len--)
87 {
88 if (*name >= 'a' && *name <= 'z')
89 *name -= ('a' - 'A');
90 name++;
91 }
92}
93
94#if 0
95static void
96str_lower(char *name, int len)
97{
98 while (len--)
99 {
100 if (*name >= 'A' && *name <= 'Z')
101 *name += ('a' - 'A');
102 name++;
103 }
104}
105#endif
106
107/* reverse a string inline. This is used by the dircache walking routines */
108static void reverse_string(char *buf, int len)
109{
110 char c;
111 char *end = buf+len-1;
112
113 while(buf < end) {
114 c = *buf;
115 *(buf++) = *end;
116 *(end--) = c;
117 }
118}
119
120/* no conversion, just a wrapper for memcpy. */
121static int convert_memcpy(unsigned char *output, int olen,
122 const unsigned char *input, int ilen,
123 struct nls_table *nls_from,
124 struct nls_table *nls_to)
125{
126 if (olen < ilen)
127 return -ENAMETOOLONG;
128 memcpy(output, input, ilen);
129 return ilen;
130}
131
132static inline int write_char(unsigned char ch, char *output, int olen)
133{
134 if (olen < 4)
135 return -ENAMETOOLONG;
136 sprintf(output, ":x%02x", ch);
137 return 4;
138}
139
140static inline int write_unichar(wchar_t ch, char *output, int olen)
141{
142 if (olen < 5)
143 return -ENAMETOOLONG;
144 sprintf(output, ":%04x", ch);
145 return 5;
146}
147
148/* convert from one "codepage" to another (possibly being utf8). */
149static int convert_cp(unsigned char *output, int olen,
150 const unsigned char *input, int ilen,
151 struct nls_table *nls_from,
152 struct nls_table *nls_to)
153{
154 int len = 0;
155 int n;
156 wchar_t ch;
157
158 while (ilen > 0) {
159 /* convert by changing to unicode and back to the new cp */
160 n = nls_from->char2uni(input, ilen, &ch);
161 if (n == -EINVAL) {
162 ilen--;
163 n = write_char(*input++, output, olen);
164 if (n < 0)
165 goto fail;
166 output += n;
167 olen -= n;
168 len += n;
169 continue;
170 } else if (n < 0)
171 goto fail;
172 input += n;
173 ilen -= n;
174
175 n = nls_to->uni2char(ch, output, olen);
176 if (n == -EINVAL)
177 n = write_unichar(ch, output, olen);
178 if (n < 0)
179 goto fail;
180 output += n;
181 olen -= n;
182
183 len += n;
184 }
185 return len;
186fail:
187 return n;
188}
189
190/* ----------------------------------------------------------- */
191
192/*
193 * nls_unicode
194 *
195 * This encodes/decodes little endian unicode format
196 */
197
198static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
199{
200 if (boundlen < 2)
201 return -EINVAL;
202 *out++ = uni & 0xff;
203 *out++ = uni >> 8;
204 return 2;
205}
206
207static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
208{
209 if (boundlen < 2)
210 return -EINVAL;
211 *uni = (rawstring[1] << 8) | rawstring[0];
212 return 2;
213}
214
215static struct nls_table unicode_table = {
216 .charset = "unicode",
217 .uni2char = uni2char,
218 .char2uni = char2uni,
219};
220
221/* ----------------------------------------------------------- */
222
223static int setcodepage(struct nls_table **p, char *name)
224{
225 struct nls_table *nls;
226
227 if (!name || !*name) {
228 nls = NULL;
229 } else if ( (nls = load_nls(name)) == NULL) {
230 printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name);
231 return -EINVAL;
232 }
233
234 /* if already set, unload the previous one. */
235 if (*p && *p != &unicode_table)
236 unload_nls(*p);
237 *p = nls;
238
239 return 0;
240}
241
242/* Handles all changes to codepage settings. */
243int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp)
244{
245 int n = 0;
246
247 smb_lock_server(server);
248
249 /* Don't load any nls_* at all, if no remote is requested */
250 if (!*cp->remote_name)
251 goto out;
252
253 /* local */
254 n = setcodepage(&server->local_nls, cp->local_name);
255 if (n != 0)
256 goto out;
257
258 /* remote */
259 if (!strcmp(cp->remote_name, "unicode")) {
260 server->remote_nls = &unicode_table;
261 } else {
262 n = setcodepage(&server->remote_nls, cp->remote_name);
263 if (n != 0)
264 setcodepage(&server->local_nls, NULL);
265 }
266
267out:
268 if (server->local_nls != NULL && server->remote_nls != NULL)
269 server->ops->convert = convert_cp;
270 else
271 server->ops->convert = convert_memcpy;
272
273 smb_unlock_server(server);
274 return n;
275}
276
277
278/*****************************************************************************/
279/* */
280/* Encoding/Decoding section */
281/* */
282/*****************************************************************************/
283
284static __u8 *
285smb_encode_smb_length(__u8 * p, __u32 len)
286{
287 *p = 0;
288 *(p+1) = 0;
289 *(p+2) = (len & 0xFF00) >> 8;
290 *(p+3) = (len & 0xFF);
291 if (len > 0xFFFF)
292 {
293 *(p+1) = 1;
294 }
295 return p + 4;
296}
297
298/*
299 * smb_build_path: build the path to entry and name storing it in buf.
300 * The path returned will have the trailing '\0'.
301 */
302static int smb_build_path(struct smb_sb_info *server, unsigned char *buf,
303 int maxlen,
304 struct dentry *entry, struct qstr *name)
305{
306 unsigned char *path = buf;
307 int len;
308 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0;
309
310 if (maxlen < (2<<unicode))
311 return -ENAMETOOLONG;
312
313 if (maxlen > SMB_MAXPATHLEN + 1)
314 maxlen = SMB_MAXPATHLEN + 1;
315
316 if (entry == NULL)
317 goto test_name_and_out;
318
319 /*
320 * If IS_ROOT, we have to do no walking at all.
321 */
322 if (IS_ROOT(entry) && !name) {
323 *path++ = '\\';
324 if (unicode) *path++ = '\0';
325 *path++ = '\0';
326 if (unicode) *path++ = '\0';
327 return path-buf;
328 }
329
330 /*
331 * Build the path string walking the tree backward from end to ROOT
332 * and store it in reversed order [see reverse_string()]
333 */
334 dget(entry);
1da177e4
LT		 335 while (!IS_ROOT(entry)) {
336 struct dentry *parent;
337
338 if (maxlen < (3<<unicode)) {
1da177e4
LT		 339 dput(entry);
340 return -ENAMETOOLONG;
341 }
342
be9eee2e 343 spin_lock(&entry->d_lock);
1da177e4
LT		 344 len = server->ops->convert(path, maxlen-2,
345 entry->d_name.name, entry->d_name.len,
346 server->local_nls, server->remote_nls);
347 if (len < 0) {
348 spin_unlock(&entry->d_lock);
349 dput(entry);
350 return len;
351 }
352 reverse_string(path, len);
353 path += len;
354 if (unicode) {
355 /* Note: reverse order */
356 *path++ = '\0';
357 maxlen--;
358 }
359 *path++ = '\\';
360 maxlen -= len+1;
1da177e4 361 spin_unlock(&entry->d_lock);
be9eee2e
CH		 362
363 parent = dget_parent(entry);
1da177e4
LT		 364 dput(entry);
365 entry = parent;
1da177e4 366 }
1da177e4
LT		 367 dput(entry);
368 reverse_string(buf, path-buf);
369
370 /* maxlen has space for at least one char */
371test_name_and_out:
372 if (name) {
373 if (maxlen < (3<<unicode))
374 return -ENAMETOOLONG;
375 *path++ = '\\';
376 if (unicode) {
377 *path++ = '\0';
378 maxlen--;
379 }
380 len = server->ops->convert(path, maxlen-2,
381 name->name, name->len,
382 server->local_nls, server->remote_nls);
383 if (len < 0)
384 return len;
385 path += len;
386 maxlen -= len+1;
387 }
388 /* maxlen has space for at least one char */
389 *path++ = '\0';
390 if (unicode) *path++ = '\0';
391 return path-buf;
392}
393
394static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen,
395 struct dentry *dir, struct qstr *name)
396{
397 int result;
398
399 result = smb_build_path(server, buf, maxlen, dir, name);
400 if (result < 0)
401 goto out;
402 if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS)
403 str_upper(buf, result);
404out:
405 return result;
406}
407
408/* encode_path for non-trans2 request SMBs */
409static int smb_simple_encode_path(struct smb_request *req, char **p,
410 struct dentry * entry, struct qstr * name)
411{
412 struct smb_sb_info *server = req->rq_server;
413 char *s = *p;
414 int res;
415 int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s;
416 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
417
418 if (!maxlen)
419 return -ENAMETOOLONG;
420 *s++ = 4; /* ASCII data format */
421
422 /*
423 * SMB Unicode strings must be 16bit aligned relative the start of the
424 * packet. If they are not they must be padded with 0.
425 */
426 if (unicode) {
427 int align = s - (char *)req->rq_buffer;
428 if (!(align & 1)) {
429 *s++ = '\0';
430 maxlen--;
431 }
432 }
433
434 res = smb_encode_path(server, s, maxlen-1, entry, name);
435 if (res < 0)
436 return res;
437 *p = s + res;
438 return 0;
439}
440
441/* The following are taken directly from msdos-fs */
442
443/* Linear day numbers of the respective 1sts in non-leap years. */
444
445static int day_n[] =
446{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
447 /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
448
449
450static time_t
451utc2local(struct smb_sb_info *server, time_t time)
452{
453 return time - server->opt.serverzone*60;
454}
455
456static time_t
457local2utc(struct smb_sb_info *server, time_t time)
458{
459 return time + server->opt.serverzone*60;
460}
461
462/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
463
464static time_t
465date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time)
466{
467 int month, year;
468 time_t secs;
469
470 /* first subtract and mask after that... Otherwise, if
471 date == 0, bad things happen */
472 month = ((date >> 5) - 1) & 15;
473 year = date >> 9;
474 secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 *
475 ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 &&
476 month < 2 ? 1 : 0) + 3653);
477 /* days since 1.1.70 plus 80's leap day */
478 return local2utc(server, secs);
479}
480
481
482/* Convert linear UNIX date to a MS-DOS time/date pair. */
483
484static void
485date_unix2dos(struct smb_sb_info *server,
486 int unix_date, __u16 *date, __u16 *time)
487{
488 int day, year, nl_day, month;
489
490 unix_date = utc2local(server, unix_date);
491 if (unix_date < 315532800)
492 unix_date = 315532800;
493
494 *time = (unix_date % 60) / 2 +
495 (((unix_date / 60) % 60) << 5) +
496 (((unix_date / 3600) % 24) << 11);
497
498 day = unix_date / 86400 - 3652;
499 year = day / 365;
500 if ((year + 3) / 4 + 365 * year > day)
501 year--;
502 day -= (year + 3) / 4 + 365 * year;
503 if (day == 59 && !(year & 3)) {
504 nl_day = day;
505 month = 2;
506 } else {
507 nl_day = (year & 3) || day <= 59 ? day : day - 1;
ca976c53 508 for (month = 1; month < 12; month++)
1da177e4
LT		 509 if (day_n[month] > nl_day)
510 break;
511 }
512 *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
513}
514
515/* The following are taken from fs/ntfs/util.c */
516
517#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
518
519/*
520 * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
521 * into Unix UTC (based 1970-01-01, in seconds).
522 */
523static struct timespec
524smb_ntutc2unixutc(u64 ntutc)
525{
526 struct timespec ts;
527 /* FIXME: what about the timezone difference? */
528 /* Subtract the NTFS time offset, then convert to 1s intervals. */
529 u64 t = ntutc - NTFS_TIME_OFFSET;
530 ts.tv_nsec = do_div(t, 10000000) * 100;
531 ts.tv_sec = t;
532 return ts;
533}
534
535/* Convert the Unix UTC into NT time */
536static u64
537smb_unixutc2ntutc(struct timespec ts)
538{
539 /* Note: timezone conversion is probably wrong. */
540 /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */
541 return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET;
542}
543
544#define MAX_FILE_MODE 6
545static mode_t file_mode[] = {
546 S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK
547};
548
549static int smb_filetype_to_mode(u32 filetype)
550{
551 if (filetype > MAX_FILE_MODE) {
552 PARANOIA("Filetype out of range: %d\n", filetype);
553 return S_IFREG;
554 }
555 return file_mode[filetype];
556}
557
558static u32 smb_filetype_from_mode(int mode)
559{
560 if (S_ISREG(mode))
561 return UNIX_TYPE_FILE;
562 if (S_ISDIR(mode))
563 return UNIX_TYPE_DIR;
564 if (S_ISLNK(mode))
565 return UNIX_TYPE_SYMLINK;
566 if (S_ISCHR(mode))
567 return UNIX_TYPE_CHARDEV;
568 if (S_ISBLK(mode))
569 return UNIX_TYPE_BLKDEV;
570 if (S_ISFIFO(mode))
571 return UNIX_TYPE_FIFO;
572 if (S_ISSOCK(mode))
573 return UNIX_TYPE_SOCKET;
574 return UNIX_TYPE_UNKNOWN;
575}
576
577
578/*****************************************************************************/
579/* */
580/* Support section. */
581/* */
582/*****************************************************************************/
583
584__u32
585smb_len(__u8 * p)
586{
587 return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3);
588}
589
590static __u16
591smb_bcc(__u8 * packet)
592{
593 int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16);
594 return WVAL(packet, pos);
595}
596
597/* smb_valid_packet: We check if packet fulfills the basic
598 requirements of a smb packet */
599
600static int
601smb_valid_packet(__u8 * packet)
602{
603 return (packet[4] == 0xff
604 && packet[5] == 'S'
605 && packet[6] == 'M'
606 && packet[7] == 'B'
607 && (smb_len(packet) + 4 == SMB_HEADER_LEN
608 + SMB_WCT(packet) * 2 + smb_bcc(packet)));
609}
610
611/* smb_verify: We check if we got the answer we expected, and if we
612 got enough data. If bcc == -1, we don't care. */
613
614static int
615smb_verify(__u8 * packet, int command, int wct, int bcc)
616{
617 if (SMB_CMD(packet) != command)
618 goto bad_command;
619 if (SMB_WCT(packet) < wct)
620 goto bad_wct;
621 if (bcc != -1 && smb_bcc(packet) < bcc)
622 goto bad_bcc;
623 return 0;
624
625bad_command:
626 printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n",
627 command, SMB_CMD(packet));
628 goto fail;
629bad_wct:
630 printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n",
631 command, wct, SMB_WCT(packet));
632 goto fail;
633bad_bcc:
634 printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n",
635 command, bcc, smb_bcc(packet));
636fail:
637 return -EIO;
638}
639
640/*
641 * Returns the maximum read or write size for the "payload". Making all of the
642 * packet fit within the negotiated max_xmit size.
643 *
644 * N.B. Since this value is usually computed before locking the server,
645 * the server's packet size must never be decreased!
646 */
647static inline int
648smb_get_xmitsize(struct smb_sb_info *server, int overhead)
649{
650 return server->opt.max_xmit - overhead;
651}
652
653/*
654 * Calculate the maximum read size
655 */
656int
657smb_get_rsize(struct smb_sb_info *server)
658{
659 /* readX has 12 parameters, read has 5 */
660 int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2;
661 int size = smb_get_xmitsize(server, overhead);
662
663 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
664
665 return size;
666}
667
668/*
669 * Calculate the maximum write size
670 */
671int
672smb_get_wsize(struct smb_sb_info *server)
673{
674 /* writeX has 14 parameters, write has 5 */
675 int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2;
676 int size = smb_get_xmitsize(server, overhead);
677
678 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
679
680 return size;
681}
682
683/*
684 * Convert SMB error codes to -E... errno values.
685 */
686int
687smb_errno(struct smb_request *req)
688{
689 int errcls = req->rq_rcls;
690 int error = req->rq_err;
691 char *class = "Unknown";
692
693 VERBOSE("errcls %d code %d from command 0x%x\n",
694 errcls, error, SMB_CMD(req->rq_header));
695
696 if (errcls == ERRDOS) {
697 switch (error) {
698 case ERRbadfunc:
699 return -EINVAL;
700 case ERRbadfile:
701 case ERRbadpath:
702 return -ENOENT;
703 case ERRnofids:
704 return -EMFILE;
705 case ERRnoaccess:
706 return -EACCES;
707 case ERRbadfid:
708 return -EBADF;
709 case ERRbadmcb:
710 return -EREMOTEIO;
711 case ERRnomem:
712 return -ENOMEM;
713 case ERRbadmem:
714 return -EFAULT;
715 case ERRbadenv:
716 case ERRbadformat:
717 return -EREMOTEIO;
718 case ERRbadaccess:
719 return -EACCES;
720 case ERRbaddata:
721 return -E2BIG;
722 case ERRbaddrive:
723 return -ENXIO;
724 case ERRremcd:
725 return -EREMOTEIO;
726 case ERRdiffdevice:
727 return -EXDEV;
728 case ERRnofiles:
729 return -ENOENT;
730 case ERRbadshare:
731 return -ETXTBSY;
732 case ERRlock:
733 return -EDEADLK;
734 case ERRfilexists:
735 return -EEXIST;
736 case ERROR_INVALID_PARAMETER:
737 return -EINVAL;
738 case ERROR_DISK_FULL:
739 return -ENOSPC;
740 case ERROR_INVALID_NAME:
741 return -ENOENT;
742 case ERROR_DIR_NOT_EMPTY:
743 return -ENOTEMPTY;
744 case ERROR_NOT_LOCKED:
745 return -ENOLCK;
746 case ERROR_ALREADY_EXISTS:
747 return -EEXIST;
748 default:
749 class = "ERRDOS";
750 goto err_unknown;
751 }
752 } else if (errcls == ERRSRV) {
753 switch (error) {
754 /* N.B. This is wrong ... EIO ? */
755 case ERRerror:
756 return -ENFILE;
757 case ERRbadpw:
758 return -EINVAL;
759 case ERRbadtype:
760 case ERRtimeout:
761 return -EIO;
762 case ERRaccess:
763 return -EACCES;
764 /*
765 * This is a fatal error, as it means the "tree ID"
766 * for this connection is no longer valid. We map
767 * to a special error code and get a new connection.
768 */
769 case ERRinvnid:
770 return -EBADSLT;
771 default:
772 class = "ERRSRV";
773 goto err_unknown;
774 }
775 } else if (errcls == ERRHRD) {
776 switch (error) {
777 case ERRnowrite:
778 return -EROFS;
779 case ERRbadunit:
780 return -ENODEV;
781 case ERRnotready:
782 return -EUCLEAN;
783 case ERRbadcmd:
784 case ERRdata:
785 return -EIO;
786 case ERRbadreq:
787 return -ERANGE;
788 case ERRbadshare:
789 return -ETXTBSY;
790 case ERRlock:
791 return -EDEADLK;
792 case ERRdiskfull:
793 return -ENOSPC;
794 default:
795 class = "ERRHRD";
796 goto err_unknown;
797 }
798 } else if (errcls == ERRCMD) {
799 class = "ERRCMD";
800 } else if (errcls == SUCCESS) {
801 return 0; /* This is the only valid 0 return */
802 }
803
804err_unknown:
805 printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n",
806 class, error, SMB_CMD(req->rq_header));
807 return -EIO;
808}
809
810/* smb_request_ok: We expect the server to be locked. Then we do the
811 request and check the answer completely. When smb_request_ok
812 returns 0, you can be quite sure that everything went well. When
813 the answer is <=0, the returned number is a valid unix errno. */
814
815static int
816smb_request_ok(struct smb_request *req, int command, int wct, int bcc)
817{
818 int result;
819
820 req->rq_resp_wct = wct;
821 req->rq_resp_bcc = bcc;
822
823 result = smb_add_request(req);
824 if (result != 0) {
825 DEBUG1("smb_request failed\n");
826 goto out;
827 }
828
829 if (smb_valid_packet(req->rq_header) != 0) {
830 PARANOIA("invalid packet!\n");
831 goto out;
832 }
833
834 result = smb_verify(req->rq_header, command, wct, bcc);
835
836out:
837 return result;
838}
839
840/*
841 * This implements the NEWCONN ioctl. It installs the server pid,
842 * sets server->state to CONN_VALID, and wakes up the waiting process.
843 */
844int
845smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
846{
847 struct file *filp;
848 struct sock *sk;
849 int error;
850
851 VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid);
852
853 smb_lock_server(server);
854
855 /*
856 * Make sure we don't already have a valid connection ...
857 */
858 error = -EINVAL;
859 if (server->state == CONN_VALID)
860 goto out;
861
862 error = -EACCES;
e2950b17 863 if (current_uid() != server->mnt->mounted_uid &&
1da177e4
LT		 864 !capable(CAP_SYS_ADMIN))
865 goto out;
866
867 error = -EBADF;
868 filp = fget(opt->fd);
869 if (!filp)
870 goto out;
17b75e69 871 if (!smb_valid_socket(filp->f_path.dentry->d_inode))
1da177e4
LT		 872 goto out_putf;
873
874 server->sock_file = filp;
a71113da 875 server->conn_pid = get_pid(task_pid(current));
1da177e4
LT		 876 server->opt = *opt;
877 server->generation += 1;
878 server->state = CONN_VALID;
879 error = 0;
880
881 if (server->conn_error) {
882 /*
883 * conn_error is the returncode we originally decided to
884 * drop the old connection on. This message should be positive
885 * and not make people ask questions on why smbfs is printing
886 * error messages ...
887 */
888 printk(KERN_INFO "SMB connection re-established (%d)\n",
889 server->conn_error);
890 server->conn_error = 0;
891 }
892
893 /*
894 * Store the server in sock user_data (Only used by sunrpc)
895 */
17b75e69 896 sk = SOCKET_I(filp->f_path.dentry->d_inode)->sk;
1da177e4
LT		 897 sk->sk_user_data = server;
898
899 /* chain into the data_ready callback */
900 server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready);
901
902 /* check if we have an old smbmount that uses seconds for the
903 serverzone */
904 if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60)
905 server->opt.serverzone /= 60;
906
907 /* now that we have an established connection we can detect the server
908 type and enable bug workarounds */
909 if (server->opt.protocol < SMB_PROTOCOL_LANMAN2)
910 install_ops(server->ops, &smb_ops_core);
911 else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2)
912 install_ops(server->ops, &smb_ops_os2);
913 else if (server->opt.protocol == SMB_PROTOCOL_NT1 &&
914 (server->opt.max_xmit < 0x1000) &&
915 !(server->opt.capabilities & SMB_CAP_NT_SMBS)) {
916 /* FIXME: can we kill the WIN95 flag now? */
917 server->mnt->flags |= SMB_MOUNT_WIN95;
918 VERBOSE("detected WIN95 server\n");
919 install_ops(server->ops, &smb_ops_win95);
920 } else {
921 /*
922 * Samba has max_xmit 65535
923 * NT4spX has max_xmit 4536 (or something like that)
924 * win2k has ...
925 */
926 VERBOSE("detected NT1 (Samba, NT4/5) server\n");
927 install_ops(server->ops, &smb_ops_winNT);
928 }
929
930 /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */
931 if (server->mnt->flags & SMB_MOUNT_OLDATTR) {
932 server->ops->getattr = smb_proc_getattr_core;
933 } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) {
934 server->ops->getattr = smb_proc_getattr_ff;
935 }
936
937 /* Decode server capabilities */
938 if (server->opt.capabilities & SMB_CAP_LARGE_FILES) {
939 /* Should be ok to set this now, as no one can access the
940 mount until the connection has been established. */
941 SB_of(server)->s_maxbytes = ~0ULL >> 1;
942 VERBOSE("LFS enabled\n");
943 }
944 if (server->opt.capabilities & SMB_CAP_UNICODE) {
945 server->mnt->flags |= SMB_MOUNT_UNICODE;
946 VERBOSE("Unicode enabled\n");
947 } else {
948 server->mnt->flags &= ~SMB_MOUNT_UNICODE;
949 }
950#if 0
951 /* flags we may test for other patches ... */
952 if (server->opt.capabilities & SMB_CAP_LARGE_READX) {
953 VERBOSE("Large reads enabled\n");
954 }
955 if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) {
956 VERBOSE("Large writes enabled\n");
957 }
958#endif
959 if (server->opt.capabilities & SMB_CAP_UNIX) {
960 struct inode *inode;
961 VERBOSE("Using UNIX CIFS extensions\n");
962 install_ops(server->ops, &smb_ops_unix);
963 inode = SB_of(server)->s_root->d_inode;
964 if (inode)
965 inode->i_op = &smb_dir_inode_operations_unix;
966 }
967
968 VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n",
a71113da
EB		 969 server->opt.protocol, server->opt.max_xmit,
970 pid_nr(server->conn_pid), server->opt.capabilities);
1da177e4
LT		 971
972 /* FIXME: this really should be done by smbmount. */
973 if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) {
974 server->opt.max_xmit = SMB_MAX_PACKET_SIZE;
975 }
976
977 smb_unlock_server(server);
978 smbiod_wake_up();
979 if (server->opt.capabilities & SMB_CAP_UNIX)
980 smb_proc_query_cifsunix(server);
981
982 server->conn_complete++;
983 wake_up_interruptible_all(&server->conn_wq);
984 return error;
985
986out:
987 smb_unlock_server(server);
988 smbiod_wake_up();
989 return error;
990
991out_putf:
992 fput(filp);
993 goto out;
994}
995
996/* smb_setup_header: We completely set up the packet. You only have to
997 insert the command-specific fields */
998
999__u8 *
1000smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc)
1001{
1002 __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2;
1003 __u8 *p = req->rq_header;
1004 struct smb_sb_info *server = req->rq_server;
1005
1006 p = smb_encode_smb_length(p, xmit_len - 4);
1007
1008 *p++ = 0xff;
1009 *p++ = 'S';
1010 *p++ = 'M';
1011 *p++ = 'B';
1012 *p++ = command;
1013
1014 memset(p, '\0', 19);
1015 p += 19;
1016 p += 8;
1017
1018 if (server->opt.protocol > SMB_PROTOCOL_CORE) {
1019 int flags = SMB_FLAGS_CASELESS_PATHNAMES;
1020 int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS |
1021 SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */
1022
1023 *(req->rq_header + smb_flg) = flags;
1024 if (server->mnt->flags & SMB_MOUNT_UNICODE)
1025 flags2 |= SMB_FLAGS2_UNICODE_STRINGS;
1026 WSET(req->rq_header, smb_flg2, flags2);
1027 }
1028 *p++ = wct; /* wct */
1029 p += 2 * wct;
1030 WSET(p, 0, bcc);
1031
1032 /* Include the header in the data to send */
1033 req->rq_iovlen = 1;
1034 req->rq_iov[0].iov_base = req->rq_header;
1035 req->rq_iov[0].iov_len = xmit_len - bcc;
1036
1037 return req->rq_buffer;
1038}
1039
1040static void
1041smb_setup_bcc(struct smb_request *req, __u8 *p)
1042{
1043 u16 bcc = p - req->rq_buffer;
1044 u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header);
1045
1046 WSET(pbcc, 0, bcc);
1047
1048 smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN +
1049 2*SMB_WCT(req->rq_header) - 2 + bcc);
1050
1051 /* Include the "bytes" in the data to send */
1052 req->rq_iovlen = 2;
1053 req->rq_iov[1].iov_base = req->rq_buffer;
1054 req->rq_iov[1].iov_len = bcc;
1055}
1056
1057static int
1058smb_proc_seek(struct smb_sb_info *server, __u16 fileid,
1059 __u16 mode, off_t offset)
1060{
1061 int result;
1062 struct smb_request *req;
1063
1064 result = -ENOMEM;
1065 if (! (req = smb_alloc_request(server, 0)))
1066 goto out;
1067
1068 smb_setup_header(req, SMBlseek, 4, 0);
1069 WSET(req->rq_header, smb_vwv0, fileid);
1070 WSET(req->rq_header, smb_vwv1, mode);
1071 DSET(req->rq_header, smb_vwv2, offset);
1072 req->rq_flags |= SMB_REQ_NORETRY;
1073
1074 result = smb_request_ok(req, SMBlseek, 2, 0);
1075 if (result < 0) {
1076 result = 0;
1077 goto out_free;
1078 }
1079
1080 result = DVAL(req->rq_header, smb_vwv0);
1081out_free:
1082 smb_rput(req);
1083out:
1084 return result;
1085}
1086
1087static int
1088smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish)
1089{
1090 struct inode *ino = dentry->d_inode;
1091 struct smb_inode_info *ei = SMB_I(ino);
1092 int mode, read_write = 0x42, read_only = 0x40;
1093 int res;
1094 char *p;
1095 struct smb_request *req;
1096
1097 /*
1098 * Attempt to open r/w, unless there are no write privileges.
1099 */
1100 mode = read_write;
1101 if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
1102 mode = read_only;
1103#if 0
1104 /* FIXME: why is this code not in? below we fix it so that a caller
1105 wanting RO doesn't get RW. smb_revalidate_inode does some
1106 optimization based on access mode. tail -f needs it to be correct.
1107
1108 We must open rw since we don't do the open if called a second time
1109 with different 'wish'. Is that not supported by smb servers? */
1110 if (!(wish & (O_WRONLY | O_RDWR)))
1111 mode = read_only;
1112#endif
1113
1114 res = -ENOMEM;
1115 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1116 goto out;
1117
1118 retry:
1119 p = smb_setup_header(req, SMBopen, 2, 0);
1120 WSET(req->rq_header, smb_vwv0, mode);
1121 WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR);
1122 res = smb_simple_encode_path(req, &p, dentry, NULL);
1123 if (res < 0)
1124 goto out_free;
1125 smb_setup_bcc(req, p);
1126
1127 res = smb_request_ok(req, SMBopen, 7, 0);
1128 if (res != 0) {
1129 if (mode == read_write &&
1130 (res == -EACCES || res == -ETXTBSY || res == -EROFS))
1131 {
1132 VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n",
1133 DENTRY_PATH(dentry), res);
1134 mode = read_only;
1135 req->rq_flags = 0;
1136 goto retry;
1137 }
1138 goto out_free;
1139 }
1140 /* We should now have data in vwv[0..6]. */
1141
1142 ei->fileid = WVAL(req->rq_header, smb_vwv0);
1143 ei->attr = WVAL(req->rq_header, smb_vwv1);
1144 /* smb_vwv2 has mtime */
1145 /* smb_vwv4 has size */
1146 ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK);
1147 ei->open = server->generation;
1148
1149out_free:
1150 smb_rput(req);
1151out:
1152 return res;
1153}
1154
1155/*
1156 * Make sure the file is open, and check that the access
1157 * is compatible with the desired access.
1158 */
1159int
1160smb_open(struct dentry *dentry, int wish)
1161{
1162 struct inode *inode = dentry->d_inode;
1163 int result;
1164 __u16 access;
1165
1166 result = -ENOENT;
1167 if (!inode) {
1168 printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n",
1169 DENTRY_PATH(dentry));
1170 goto out;
1171 }
1172
1173 if (!smb_is_open(inode)) {
1174 struct smb_sb_info *server = server_from_inode(inode);
1175 result = 0;
1176 if (!smb_is_open(inode))
1177 result = smb_proc_open(server, dentry, wish);
1178 if (result)
1179 goto out;
1180 /*
1181 * A successful open means the path is still valid ...
1182 */
1183 smb_renew_times(dentry);
1184 }
1185
1186 /*
1187 * Check whether the access is compatible with the desired mode.
1188 */
1189 result = 0;
1190 access = SMB_I(inode)->access;
1191 if (access != wish && access != SMB_O_RDWR) {
1192 PARANOIA("%s/%s access denied, access=%x, wish=%x\n",
1193 DENTRY_PATH(dentry), access, wish);
1194 result = -EACCES;
1195 }
1196out:
1197 return result;
1198}
1199
1200static int
1201smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime)
1202{
1203 struct smb_request *req;
1204 int result = -ENOMEM;
1205
1206 if (! (req = smb_alloc_request(server, 0)))
1207 goto out;
1208
1209 smb_setup_header(req, SMBclose, 3, 0);
1210 WSET(req->rq_header, smb_vwv0, fileid);
1211 DSET(req->rq_header, smb_vwv1, utc2local(server, mtime));
1212 req->rq_flags |= SMB_REQ_NORETRY;
1213 result = smb_request_ok(req, SMBclose, 0, 0);
1214
1215 smb_rput(req);
1216out:
1217 return result;
1218}
1219
1220/*
1221 * Win NT 4.0 has an apparent bug in that it fails to update the
1222 * modify time when writing to a file. As a workaround, we update
1223 * both modify and access time locally, and post the times to the
1224 * server when closing the file.
1225 */
1226static int
1227smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino)
1228{
1229 struct smb_inode_info *ei = SMB_I(ino);
1230 int result = 0;
1231 if (smb_is_open(ino))
1232 {
1233 /*
1234 * We clear the open flag in advance, in case another
1235 * process observes the value while we block below.
1236 */
1237 ei->open = 0;
1238
1239 /*
1240 * Kludge alert: SMB timestamps are accurate only to
1241 * two seconds ... round the times to avoid needless
1242 * cache invalidations!
1243 */
1244 if (ino->i_mtime.tv_sec & 1) {
1245 ino->i_mtime.tv_sec--;
1246 ino->i_mtime.tv_nsec = 0;
1247 }
1248 if (ino->i_atime.tv_sec & 1) {
1249 ino->i_atime.tv_sec--;
1250 ino->i_atime.tv_nsec = 0;
1251 }
1252 /*
1253 * If the file is open with write permissions,
1254 * update the time stamps to sync mtime and atime.
1255 */
1256 if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 &&
1257 (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) &&
1258 !(ei->access == SMB_O_RDONLY))
1259 {
1260 struct smb_fattr fattr;
1261 smb_get_inode_attr(ino, &fattr);
1262 smb_proc_setattr_ext(server, ino, &fattr);
1263 }
1264
1265 result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec);
1266 /*
1267 * Force a revalidation after closing ... some servers
1268 * don't post the size until the file has been closed.
1269 */
1270 if (server->opt.protocol < SMB_PROTOCOL_NT1)
1271 ei->oldmtime = 0;
1272 ei->closed = jiffies;
1273 }
1274 return result;
1275}
1276
1277int
1278smb_close(struct inode *ino)
1279{
1280 int result = 0;
1281
1282 if (smb_is_open(ino)) {
1283 struct smb_sb_info *server = server_from_inode(ino);
1284 result = smb_proc_close_inode(server, ino);
1285 }
1286 return result;
1287}
1288
1289/*
1290 * This is used to close a file following a failed instantiate.
1291 * Since we don't have an inode, we can't use any of the above.
1292 */
1293int
1294smb_close_fileid(struct dentry *dentry, __u16 fileid)
1295{
1296 struct smb_sb_info *server = server_from_dentry(dentry);
1297 int result;
1298
1299 result = smb_proc_close(server, fileid, get_seconds());
1300 return result;
1301}
1302
1303/* In smb_proc_read and smb_proc_write we do not retry, because the
1304 file-id would not be valid after a reconnection. */
1305
1306static void
1307smb_proc_read_data(struct smb_request *req)
1308{
1309 req->rq_iov[0].iov_base = req->rq_buffer;
1310 req->rq_iov[0].iov_len = 3;
1311
1312 req->rq_iov[1].iov_base = req->rq_page;
1313 req->rq_iov[1].iov_len = req->rq_rsize;
1314 req->rq_iovlen = 2;
1315
1316 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1317}
1318
1319static int
1320smb_proc_read(struct inode *inode, loff_t offset, int count, char *data)
1321{
1322 struct smb_sb_info *server = server_from_inode(inode);
1323 __u16 returned_count, data_len;
1324 unsigned char *buf;
1325 int result;
1326 struct smb_request *req;
1327 u8 rbuf[4];
1328
1329 result = -ENOMEM;
1330 if (! (req = smb_alloc_request(server, 0)))
1331 goto out;
1332
1333 smb_setup_header(req, SMBread, 5, 0);
1334 buf = req->rq_header;
1335 WSET(buf, smb_vwv0, SMB_I(inode)->fileid);
1336 WSET(buf, smb_vwv1, count);
1337 DSET(buf, smb_vwv2, offset);
1338 WSET(buf, smb_vwv4, 0);
1339
1340 req->rq_page = data;
1341 req->rq_rsize = count;
1342 req->rq_callback = smb_proc_read_data;
1343 req->rq_buffer = rbuf;
1344 req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC;
1345
1346 result = smb_request_ok(req, SMBread, 5, -1);
1347 if (result < 0)
1348 goto out_free;
1349 returned_count = WVAL(req->rq_header, smb_vwv0);
1350
1351 data_len = WVAL(rbuf, 1);
1352
1353 if (returned_count != data_len) {
1354 printk(KERN_NOTICE "smb_proc_read: returned != data_len\n");
1355 printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n",
1356 returned_count, data_len);
1357 }
1358 result = data_len;
1359
1360out_free:
1361 smb_rput(req);
1362out:
1363 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1364 inode->i_ino, SMB_I(inode)->fileid, count, result);
1365 return result;
1366}
1367
1368static int
1369smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data)
1370{
1371 struct smb_sb_info *server = server_from_inode(inode);
1372 int result;
1373 u16 fileid = SMB_I(inode)->fileid;
1374 u8 buf[4];
1375 struct smb_request *req;
1376
1377 result = -ENOMEM;
1378 if (! (req = smb_alloc_request(server, 0)))
1379 goto out;
1380
1381 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1382 inode->i_ino, fileid, count, offset);
1383
1384 smb_setup_header(req, SMBwrite, 5, count + 3);
1385 WSET(req->rq_header, smb_vwv0, fileid);
1386 WSET(req->rq_header, smb_vwv1, count);
1387 DSET(req->rq_header, smb_vwv2, offset);
1388 WSET(req->rq_header, smb_vwv4, 0);
1389
1390 buf[0] = 1;
1391 WSET(buf, 1, count); /* yes, again ... */
1392 req->rq_iov[1].iov_base = buf;
1393 req->rq_iov[1].iov_len = 3;
1394 req->rq_iov[2].iov_base = (char *) data;
1395 req->rq_iov[2].iov_len = count;
1396 req->rq_iovlen = 3;
1397 req->rq_flags |= SMB_REQ_NORETRY;
1398
1399 result = smb_request_ok(req, SMBwrite, 1, 0);
1400 if (result >= 0)
1401 result = WVAL(req->rq_header, smb_vwv0);
1402
1403 smb_rput(req);
1404out:
1405 return result;
1406}
1407
1408/*
1409 * In smb_proc_readX and smb_proc_writeX we do not retry, because the
1410 * file-id would not be valid after a reconnection.
1411 */
1412
1413#define SMB_READX_MAX_PAD 64
1414static void
1415smb_proc_readX_data(struct smb_request *req)
1416{
1417 /* header length, excluding the netbios length (-4) */
1418 int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2;
1419 int data_off = WVAL(req->rq_header, smb_vwv6);
1420
1421 /*
1422 * Some genius made the padding to the data bytes arbitrary.
1423 * So we must first calculate the amount of padding used by the server.
1424 */
1425 data_off -= hdrlen;
1426 if (data_off > SMB_READX_MAX_PAD || data_off < 0) {
1427 PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n");
1428 PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off);
1429 req->rq_rlen = req->rq_bufsize + 1;
1430 return;
1431 }
1432 req->rq_iov[0].iov_base = req->rq_buffer;
1433 req->rq_iov[0].iov_len = data_off;
1434
1435 req->rq_iov[1].iov_base = req->rq_page;
1436 req->rq_iov[1].iov_len = req->rq_rsize;
1437 req->rq_iovlen = 2;
1438
1439 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1440}
1441
1442static int
1443smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data)
1444{
1445 struct smb_sb_info *server = server_from_inode(inode);
1446 unsigned char *buf;
1447 int result;
1448 struct smb_request *req;
1449 static char pad[SMB_READX_MAX_PAD];
1450
1451 result = -ENOMEM;
1452 if (! (req = smb_alloc_request(server, 0)))
1453 goto out;
1454
1455 smb_setup_header(req, SMBreadX, 12, 0);
1456 buf = req->rq_header;
1457 WSET(buf, smb_vwv0, 0x00ff);
1458 WSET(buf, smb_vwv1, 0);
1459 WSET(buf, smb_vwv2, SMB_I(inode)->fileid);
1460 DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */
1461 WSET(buf, smb_vwv5, count);
1462 WSET(buf, smb_vwv6, 0);
1463 DSET(buf, smb_vwv7, 0);
1464 WSET(buf, smb_vwv9, 0);
1465 DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */
1466 WSET(buf, smb_vwv11, 0);
1467
1468 req->rq_page = data;
1469 req->rq_rsize = count;
1470 req->rq_callback = smb_proc_readX_data;
1471 req->rq_buffer = pad;
1472 req->rq_bufsize = SMB_READX_MAX_PAD;
1473 req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY;
1474
1475 result = smb_request_ok(req, SMBreadX, 12, -1);
1476 if (result < 0)
1477 goto out_free;
1478 result = WVAL(req->rq_header, smb_vwv5);
1479
1480out_free:
1481 smb_rput(req);
1482out:
1483 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1484 inode->i_ino, SMB_I(inode)->fileid, count, result);
1485 return result;
1486}
1487
1488static int
1489smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data)
1490{
1491 struct smb_sb_info *server = server_from_inode(inode);
1492 int result;
1493 u8 *p;
1494 static u8 pad[4];
1495 struct smb_request *req;
1496
1497 result = -ENOMEM;
1498 if (! (req = smb_alloc_request(server, 0)))
1499 goto out;
1500
1501 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1502 inode->i_ino, SMB_I(inode)->fileid, count, offset);
1503
1504 p = smb_setup_header(req, SMBwriteX, 14, count + 1);
1505 WSET(req->rq_header, smb_vwv0, 0x00ff);
1506 WSET(req->rq_header, smb_vwv1, 0);
1507 WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid);
1508 DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */
1509 DSET(req->rq_header, smb_vwv5, 0);
1510 WSET(req->rq_header, smb_vwv7, 0); /* write mode */
1511 WSET(req->rq_header, smb_vwv8, 0);
1512 WSET(req->rq_header, smb_vwv9, 0);
1513 WSET(req->rq_header, smb_vwv10, count); /* data length */
1514 WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1);
1515 DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32));
1516
1517 req->rq_iov[1].iov_base = pad;
1518 req->rq_iov[1].iov_len = 1;
1519 req->rq_iov[2].iov_base = (char *) data;
1520 req->rq_iov[2].iov_len = count;
1521 req->rq_iovlen = 3;
1522 req->rq_flags |= SMB_REQ_NORETRY;
1523
1524 result = smb_request_ok(req, SMBwriteX, 6, 0);
1525 if (result >= 0)
1526 result = WVAL(req->rq_header, smb_vwv2);
1527
1528 smb_rput(req);
1529out:
1530 return result;
1531}
1532
1533int
1534smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid)
1535{
1536 struct smb_sb_info *server = server_from_dentry(dentry);
1537 char *p;
1538 int result;
1539 struct smb_request *req;
1540
1541 result = -ENOMEM;
1542 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1543 goto out;
1544
1545 p = smb_setup_header(req, SMBcreate, 3, 0);
1546 WSET(req->rq_header, smb_vwv0, attr);
1547 DSET(req->rq_header, smb_vwv1, utc2local(server, ctime));
1548 result = smb_simple_encode_path(req, &p, dentry, NULL);
1549 if (result < 0)
1550 goto out_free;
1551 smb_setup_bcc(req, p);
1552
1553 result = smb_request_ok(req, SMBcreate, 1, 0);
1554 if (result < 0)
1555 goto out_free;
1556
1557 *fileid = WVAL(req->rq_header, smb_vwv0);
1558 result = 0;
1559
1560out_free:
1561 smb_rput(req);
1562out:
1563 return result;
1564}
1565
1566int
1567smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry)
1568{
1569 struct smb_sb_info *server = server_from_dentry(old_dentry);
1570 char *p;
1571 int result;
1572 struct smb_request *req;
1573
1574 result = -ENOMEM;
1575 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1576 goto out;
1577
1578 p = smb_setup_header(req, SMBmv, 1, 0);
1579 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR);
1580 result = smb_simple_encode_path(req, &p, old_dentry, NULL);
1581 if (result < 0)
1582 goto out_free;
1583 result = smb_simple_encode_path(req, &p, new_dentry, NULL);
1584 if (result < 0)
1585 goto out_free;
1586 smb_setup_bcc(req, p);
1587
1588 if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0)
1589 goto out_free;
1590 result = 0;
1591
1592out_free:
1593 smb_rput(req);
1594out:
1595 return result;
1596}
1597
1598/*
1599 * Code common to mkdir and rmdir.
1600 */
1601static int
1602smb_proc_generic_command(struct dentry *dentry, __u8 command)
1603{
1604 struct smb_sb_info *server = server_from_dentry(dentry);
1605 char *p;
1606 int result;
1607 struct smb_request *req;
1608
1609 result = -ENOMEM;
1610 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1611 goto out;
1612
1613 p = smb_setup_header(req, command, 0, 0);
1614 result = smb_simple_encode_path(req, &p, dentry, NULL);
1615 if (result < 0)
1616 goto out_free;
1617 smb_setup_bcc(req, p);
1618
1619 result = smb_request_ok(req, command, 0, 0);
1620 if (result < 0)
1621 goto out_free;
1622 result = 0;
1623
1624out_free:
1625 smb_rput(req);
1626out:
1627 return result;
1628}
1629
1630int
1631smb_proc_mkdir(struct dentry *dentry)
1632{
1633 return smb_proc_generic_command(dentry, SMBmkdir);
1634}
1635
1636int
1637smb_proc_rmdir(struct dentry *dentry)
1638{
1639 return smb_proc_generic_command(dentry, SMBrmdir);
1640}
1641
1642#if SMBFS_POSIX_UNLINK
1643/*
1644 * Removes readonly attribute from a file. Used by unlink to give posix
1645 * semantics.
1646 */
1647static int
1648smb_set_rw(struct dentry *dentry,struct smb_sb_info *server)
1649{
1650 int result;
1651 struct smb_fattr fattr;
1652
1653 /* FIXME: cifsUE should allow removing a readonly file. */
1654
1655 /* first get current attribute */
1656 smb_init_dirent(server, &fattr);
1657 result = server->ops->getattr(server, dentry, &fattr);
1658 smb_finish_dirent(server, &fattr);
1659 if (result < 0)
1660 return result;
1661
1662 /* if RONLY attribute is set, remove it */
1663 if (fattr.attr & aRONLY) { /* read only attribute is set */
1664 fattr.attr &= ~aRONLY;
1665 result = smb_proc_setattr_core(server, dentry, fattr.attr);
1666 }
1667 return result;
1668}
1669#endif
1670
1671int
1672smb_proc_unlink(struct dentry *dentry)
1673{
1674 struct smb_sb_info *server = server_from_dentry(dentry);
1675 int flag = 0;
1676 char *p;
1677 int result;
1678 struct smb_request *req;
1679
1680 result = -ENOMEM;
1681 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1682 goto out;
1683
1684 retry:
1685 p = smb_setup_header(req, SMBunlink, 1, 0);
1686 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN);
1687 result = smb_simple_encode_path(req, &p, dentry, NULL);
1688 if (result < 0)
1689 goto out_free;
1690 smb_setup_bcc(req, p);
1691
1692 if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) {
1693#if SMBFS_POSIX_UNLINK
1694 if (result == -EACCES && !flag) {
1695 /* Posix semantics is for the read-only state
1696 of a file to be ignored in unlink(). In the
1697 SMB world a unlink() is refused on a
1698 read-only file. To make things easier for
1699 unix users we try to override the files
1700 permission if the unlink fails with the
1701 right error.
1702 This introduces a race condition that could
1703 lead to a file being written by someone who
1704 shouldn't have access, but as far as I can
1705 tell that is unavoidable */
1706
1707 /* remove RONLY attribute and try again */
1708 result = smb_set_rw(dentry,server);
1709 if (result == 0) {
1710 flag = 1;
1711 req->rq_flags = 0;
1712 goto retry;
1713 }
1714 }
1715#endif
1716 goto out_free;
1717 }
1718 result = 0;
1719
1720out_free:
1721 smb_rput(req);
1722out:
1723 return result;
1724}
1725
1726int
1727smb_proc_flush(struct smb_sb_info *server, __u16 fileid)
1728{
1729 int result;
1730 struct smb_request *req;
1731
1732 result = -ENOMEM;
1733 if (! (req = smb_alloc_request(server, 0)))
1734 goto out;
1735
1736 smb_setup_header(req, SMBflush, 1, 0);
1737 WSET(req->rq_header, smb_vwv0, fileid);
1738 req->rq_flags |= SMB_REQ_NORETRY;
1739 result = smb_request_ok(req, SMBflush, 0, 0);
1740
1741 smb_rput(req);
1742out:
1743 return result;
1744}
1745
1746static int
1747smb_proc_trunc32(struct inode *inode, loff_t length)
1748{
1749 /*
1750 * Writing 0bytes is old-SMB magic for truncating files.
1751 * MAX_NON_LFS should prevent this from being called with a too
1752 * large offset.
1753 */
1754 return smb_proc_write(inode, length, 0, NULL);
1755}
1756
1757static int
1758smb_proc_trunc64(struct inode *inode, loff_t length)
1759{
1760 struct smb_sb_info *server = server_from_inode(inode);
1761 int result;
1762 char *param;
1763 char *data;
1764 struct smb_request *req;
1765
1766 result = -ENOMEM;
1767 if (! (req = smb_alloc_request(server, 14)))
1768 goto out;
1769
1770 param = req->rq_buffer;
1771 data = req->rq_buffer + 6;
1772
1773 /* FIXME: must we also set allocation size? winNT seems to do that */
1774 WSET(param, 0, SMB_I(inode)->fileid);
1775 WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO);
1776 WSET(param, 4, 0);
1777 LSET(data, 0, length);
1778
1779 req->rq_trans2_command = TRANSACT2_SETFILEINFO;
1780 req->rq_ldata = 8;
1781 req->rq_data = data;
1782 req->rq_lparm = 6;
1783 req->rq_parm = param;
1784 req->rq_flags |= SMB_REQ_NORETRY;
1785 result = smb_add_request(req);
1786 if (result < 0)
1787 goto out_free;
1788
1789 result = 0;
1790 if (req->rq_rcls != 0)
1791 result = smb_errno(req);
1792
1793out_free:
1794 smb_rput(req);
1795out:
1796 return result;
1797}
1798
1799static int
1800smb_proc_trunc95(struct inode *inode, loff_t length)
1801{
1802 struct smb_sb_info *server = server_from_inode(inode);
1803 int result = smb_proc_trunc32(inode, length);
1804
1805 /*
1806 * win9x doesn't appear to update the size immediately.
1807 * It will return the old file size after the truncate,
1808 * confusing smbfs. So we force an update.
1809 *
1810 * FIXME: is this still necessary?
1811 */
1812 smb_proc_flush(server, SMB_I(inode)->fileid);
1813 return result;
1814}
1815
1816static void
1817smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1818{
1819 memset(fattr, 0, sizeof(*fattr));
1820
1821 fattr->f_nlink = 1;
1822 fattr->f_uid = server->mnt->uid;
1823 fattr->f_gid = server->mnt->gid;
1da177e4
LT		 1824 fattr->f_unix = 0;
1825}
1826
1827static void
1828smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1829{
1830 if (fattr->f_unix)
1831 return;
1832
1833 fattr->f_mode = server->mnt->file_mode;
1834 if (fattr->attr & aDIR) {
1835 fattr->f_mode = server->mnt->dir_mode;
1836 fattr->f_size = SMB_ST_BLKSIZE;
1837 }
1838 /* Check the read-only flag */
1839 if (fattr->attr & aRONLY)
1840 fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
1841
1842 /* How many 512 byte blocks do we need for this file? */
1843 fattr->f_blocks = 0;
1844 if (fattr->f_size != 0)
1845 fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9);
1846 return;
1847}
1848
1849void
1850smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr,
1851 struct super_block *sb)
1852{
1853 smb_init_dirent(server, fattr);
1854 fattr->attr = aDIR;
1855 fattr->f_ino = 2; /* traditional root inode number */
1856 fattr->f_mtime = current_fs_time(sb);
1857 smb_finish_dirent(server, fattr);
1858}
1859
1860/*
1861 * Decode a dirent for old protocols
1862 *
1863 * qname is filled with the decoded, and possibly translated, name.
1864 * fattr receives decoded attributes
1865 *
1866 * Bugs Noted:
1867 * (1) Pathworks servers may pad the name with extra spaces.
1868 */
1869static char *
1870smb_decode_short_dirent(struct smb_sb_info *server, char *p,
1871 struct qstr *qname, struct smb_fattr *fattr,
1872 unsigned char *name_buf)
1873{
1874 int len;
1875
1876 /*
1877 * SMB doesn't have a concept of inode numbers ...
1878 */
1879 smb_init_dirent(server, fattr);
1880 fattr->f_ino = 0; /* FIXME: do we need this? */
1881
1882 p += SMB_STATUS_SIZE; /* reserved (search_status) */
1883 fattr->attr = *p;
1884 fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1));
1885 fattr->f_mtime.tv_nsec = 0;
1886 fattr->f_size = DVAL(p, 5);
1887 fattr->f_ctime = fattr->f_mtime;
1888 fattr->f_atime = fattr->f_mtime;
1889 qname->name = p + 9;
1890 len = strnlen(qname->name, 12);
1891
1892 /*
1893 * Trim trailing blanks for Pathworks servers
1894 */
1895 while (len > 2 && qname->name[len-1] == ' ')
1896 len--;
1897
1898 smb_finish_dirent(server, fattr);
1899
1900#if 0
1901 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
1902 allow the flag to be set anyway. It kills const. Remove? */
1903 switch (server->opt.case_handling) {
1904 case SMB_CASE_UPPER:
1905 str_upper(entry->name, len);
1906 break;
1907 case SMB_CASE_LOWER:
1908 str_lower(entry->name, len);
1909 break;
1910 default:
1911 break;
1912 }
1913#endif
1914
1915 qname->len = 0;
1916 len = server->ops->convert(name_buf, SMB_MAXNAMELEN,
1917 qname->name, len,
1918 server->remote_nls, server->local_nls);
1919 if (len > 0) {
1920 qname->len = len;
1921 qname->name = name_buf;
1922 DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name);
1923 }
1924
1925 return p + 22;
1926}
1927
1928/*
1929 * This routine is used to read in directory entries from the network.
1930 * Note that it is for short directory name seeks, i.e.: protocol <
1931 * SMB_PROTOCOL_LANMAN2
1932 */
1933static int
1934smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir,
1935 struct smb_cache_control *ctl)
1936{
17b75e69 1937 struct dentry *dir = filp->f_path.dentry;
1da177e4
LT		 1938 struct smb_sb_info *server = server_from_dentry(dir);
1939 struct qstr qname;
1940 struct smb_fattr fattr;
1941 char *p;
1942 int result;
1943 int i, first, entries_seen, entries;
1944 int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE;
1945 __u16 bcc;
1946 __u16 count;
1947 char status[SMB_STATUS_SIZE];
1948 static struct qstr mask = {
1949 .name = "*.*",
1950 .len = 3,
1951 };
1952 unsigned char *last_status;
1953 struct smb_request *req;
1954 unsigned char *name_buf;
1955
1956 VERBOSE("%s/%s\n", DENTRY_PATH(dir));
1957
1958 lock_kernel();
1959
1960 result = -ENOMEM;
1961 if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL)))
1962 goto out;
1963
1964 first = 1;
1965 entries = 0;
1966 entries_seen = 2; /* implicit . and .. */
1967
1968 result = -ENOMEM;
1969 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
1970 goto out_name;
1971
1972 while (1) {
1973 p = smb_setup_header(req, SMBsearch, 2, 0);
1974 WSET(req->rq_header, smb_vwv0, entries_asked);
1975 WSET(req->rq_header, smb_vwv1, aDIR);
1976 if (first == 1) {
1977 result = smb_simple_encode_path(req, &p, dir, &mask);
1978 if (result < 0)
1979 goto out_free;
1980 if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) {
1981 result = -ENAMETOOLONG;
1982 goto out_free;
1983 }
1984 *p++ = 5;
1985 WSET(p, 0, 0);
1986 p += 2;
1987 first = 0;
1988 } else {
1989 if (p + 5 + SMB_STATUS_SIZE >
1990 (char *)req->rq_buffer + req->rq_bufsize) {
1991 result = -ENAMETOOLONG;
1992 goto out_free;
1993 }
1994
1995 *p++ = 4;
1996 *p++ = 0;
1997 *p++ = 5;
1998 WSET(p, 0, SMB_STATUS_SIZE);
1999 p += 2;
2000 memcpy(p, status, SMB_STATUS_SIZE);
2001 p += SMB_STATUS_SIZE;
2002 }
2003
2004 smb_setup_bcc(req, p);
2005
2006 result = smb_request_ok(req, SMBsearch, 1, -1);
2007 if (result < 0) {
2008 if ((req->rq_rcls == ERRDOS) &&
2009 (req->rq_err == ERRnofiles))
2010 break;
2011 goto out_free;
2012 }
2013 count = WVAL(req->rq_header, smb_vwv0);
2014 if (count <= 0)
2015 break;
2016
2017 result = -EIO;
2018 bcc = smb_bcc(req->rq_header);
2019 if (bcc != count * SMB_DIRINFO_SIZE + 3)
2020 goto out_free;
2021 p = req->rq_buffer + 3;
2022
2023
2024 /* Make sure the response fits in the buffer. Fixed sized
2025 entries means we don't have to check in the decode loop. */
2026
2027 last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE;
2028
2029 if (last_status + SMB_DIRINFO_SIZE >=
2030 req->rq_buffer + req->rq_bufsize) {
2031 printk(KERN_ERR "smb_proc_readdir_short: "
2032 "last dir entry outside buffer! "
2033 "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status,
2034 req->rq_bufsize, req->rq_buffer);
2035 goto out_free;
2036 }
2037
2038 /* Read the last entry into the status field. */
2039 memcpy(status, last_status, SMB_STATUS_SIZE);
2040
2041
2042 /* Now we are ready to parse smb directory entries. */
2043
2044 for (i = 0; i < count; i++) {
2045 p = smb_decode_short_dirent(server, p,
2046 &qname, &fattr, name_buf);
2047 if (qname.len == 0)
2048 continue;
2049
2050 if (entries_seen == 2 && qname.name[0] == '.') {
2051 if (qname.len == 1)
2052 continue;
2053 if (qname.name[1] == '.' && qname.len == 2)
2054 continue;
2055 }
2056 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2057 &qname, &fattr))
2058 ; /* stop reading? */
2059 entries_seen++;
2060 }
2061 }
2062 result = entries;
2063
2064out_free:
2065 smb_rput(req);
2066out_name:
2067 kfree(name_buf);
2068out:
2069 unlock_kernel();
2070 return result;
2071}
2072
2073static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p)
2074{
2075 u64 size, disk_bytes;
2076
2077 /* FIXME: verify nls support. all is sent as utf8? */
2078
2079 fattr->f_unix = 1;
2080 fattr->f_mode = 0;
2081
2082 /* FIXME: use the uniqueID from the remote instead? */
2083 /* 0 L file size in bytes */
2084 /* 8 L file size on disk in bytes (block count) */
2085 /* 40 L uid */
2086 /* 48 L gid */
2087 /* 56 W file type */
2088 /* 60 L devmajor */
2089 /* 68 L devminor */
2090 /* 76 L unique ID (inode) */
2091 /* 84 L permissions */
2092 /* 92 L link count */
2093
2094 size = LVAL(p, 0);
2095 disk_bytes = LVAL(p, 8);
2096
2097 /*
2098 * Some samba versions round up on-disk byte usage
2099 * to 1MB boundaries, making it useless. When seeing
2100 * that, use the size instead.
2101 */
2102 if (!(disk_bytes & 0xfffff))
2103 disk_bytes = size+511;
2104
2105 fattr->f_size = size;
2106 fattr->f_blocks = disk_bytes >> 9;
2107 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16));
2108 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24));
2109 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32));
2110
2111 if (server->mnt->flags & SMB_MOUNT_UID)
2112 fattr->f_uid = server->mnt->uid;
2113 else
2114 fattr->f_uid = LVAL(p, 40);
2115
2116 if (server->mnt->flags & SMB_MOUNT_GID)
2117 fattr->f_gid = server->mnt->gid;
2118 else
2119 fattr->f_gid = LVAL(p, 48);
2120
2121 fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56));
2122
2123 if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) {
2124 __u64 major = LVAL(p, 60);
2125 __u64 minor = LVAL(p, 68);
2126
2127 fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff);
2128 if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) ||
2129 MINOR(fattr->f_rdev) != (minor & 0xffffffff))
2130 fattr->f_rdev = 0;
2131 }
2132
2133 fattr->f_mode |= LVAL(p, 84);
2134
2135 if ( (server->mnt->flags & SMB_MOUNT_DMODE) &&
2136 (S_ISDIR(fattr->f_mode)) )
2137 fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR;
2138 else if ( (server->mnt->flags & SMB_MOUNT_FMODE) &&
2139 !(S_ISDIR(fattr->f_mode)) )
2140 fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) |
2141 (fattr->f_mode & S_IFMT);
2142
2143}
2144
2145/*
2146 * Interpret a long filename structure using the specified info level:
2147 * level 1 for anything below NT1 protocol
2148 * level 260 for NT1 protocol
2149 *
2150 * qname is filled with the decoded, and possibly translated, name
2151 * fattr receives decoded attributes.
2152 *
2153 * Bugs Noted:
2154 * (1) Win NT 4.0 appends a null byte to names and counts it in the length!
2155 */
2156static char *
2157smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level,
2158 struct qstr *qname, struct smb_fattr *fattr,
2159 unsigned char *name_buf)
2160{
2161 char *result;
2162 unsigned int len = 0;
2163 int n;
2164 __u16 date, time;
2165 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
2166
2167 /*
2168 * SMB doesn't have a concept of inode numbers ...
2169 */
2170 smb_init_dirent(server, fattr);
2171 fattr->f_ino = 0; /* FIXME: do we need this? */
2172
2173 switch (level) {
2174 case 1:
2175 len = *((unsigned char *) p + 22);
2176 qname->name = p + 23;
2177 result = p + 24 + len;
2178
2179 date = WVAL(p, 0);
2180 time = WVAL(p, 2);
2181 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2182 fattr->f_ctime.tv_nsec = 0;
2183
2184 date = WVAL(p, 4);
2185 time = WVAL(p, 6);
2186 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2187 fattr->f_atime.tv_nsec = 0;
2188
2189 date = WVAL(p, 8);
2190 time = WVAL(p, 10);
2191 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2192 fattr->f_mtime.tv_nsec = 0;
2193 fattr->f_size = DVAL(p, 12);
2194 /* ULONG allocation size */
2195 fattr->attr = WVAL(p, 20);
2196
2197 VERBOSE("info 1 at %p, len=%d, name=%.*s\n",
2198 p, len, len, qname->name);
2199 break;
2200 case 260:
2201 result = p + WVAL(p, 0);
2202 len = DVAL(p, 60);
2203 if (len > 255) len = 255;
2204 /* NT4 null terminates, unless we are using unicode ... */
2205 qname->name = p + 94;
2206 if (!unicode && len && qname->name[len-1] == '\0')
2207 len--;
2208
2209 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8));
2210 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16));
2211 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24));
2212 /* change time (32) */
2213 fattr->f_size = LVAL(p, 40);
2214 /* alloc size (48) */
2215 fattr->attr = DVAL(p, 56);
2216
2217 VERBOSE("info 260 at %p, len=%d, name=%.*s\n",
2218 p, len, len, qname->name);
2219 break;
2220 case SMB_FIND_FILE_UNIX:
2221 result = p + WVAL(p, 0);
2222 qname->name = p + 108;
2223
2224 len = strlen(qname->name);
2225 /* FIXME: should we check the length?? */
2226
2227 p += 8;
2228 smb_decode_unix_basic(fattr, server, p);
2229 VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n",
2230 p, len, len, qname->name);
2231 break;
2232 default:
2233 PARANOIA("Unknown info level %d\n", level);
2234 result = p + WVAL(p, 0);
2235 goto out;
2236 }
2237
2238 smb_finish_dirent(server, fattr);
2239
2240#if 0
2241 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
2242 allow the flag to be set anyway. Remove? */
2243 switch (server->opt.case_handling) {
2244 case SMB_CASE_UPPER:
2245 str_upper(qname->name, len);
2246 break;
2247 case SMB_CASE_LOWER:
2248 str_lower(qname->name, len);
2249 break;
2250 default:
2251 break;
2252 }
2253#endif
2254
2255 qname->len = 0;
2256 n = server->ops->convert(name_buf, SMB_MAXNAMELEN,
2257 qname->name, len,
2258 server->remote_nls, server->local_nls);
2259 if (n > 0) {
2260 qname->len = n;
2261 qname->name = name_buf;
2262 }
2263
2264out:
2265 return result;
2266}
2267
2268/* findfirst/findnext flags */
2269#define SMB_CLOSE_AFTER_FIRST (1<<0)
2270#define SMB_CLOSE_IF_END (1<<1)
2271#define SMB_REQUIRE_RESUME_KEY (1<<2)
2272#define SMB_CONTINUE_BIT (1<<3)
2273
2274/*
2275 * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in
2276 * source/libsmb/clilist.c. When looking for smb bugs in the readdir code,
2277 * go there for advise.
2278 *
2279 * Bugs Noted:
2280 * (1) When using Info Level 1 Win NT 4.0 truncates directory listings
2281 * for certain patterns of names and/or lengths. The breakage pattern
2282 * is completely reproducible and can be toggled by the creation of a
2283 * single file. (E.g. echo hi >foo breaks, rm -f foo works.)
2284 */
2285static int
2286smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir,
2287 struct smb_cache_control *ctl)
2288{
17b75e69 2289 struct dentry *dir = filp->f_path.dentry;
1da177e4
LT		 2290 struct smb_sb_info *server = server_from_dentry(dir);
2291 struct qstr qname;
2292 struct smb_fattr fattr;
2293
2294 unsigned char *p, *lastname;
2295 char *mask, *param;
2296 __u16 command;
2297 int first, entries_seen;
2298
2299 /* Both NT and OS/2 accept info level 1 (but see note below). */
2300 int info_level = 260;
2301 const int max_matches = 512;
2302
2303 unsigned int ff_searchcount = 0;
2304 unsigned int ff_eos = 0;
2305 unsigned int ff_lastname = 0;
2306 unsigned int ff_dir_handle = 0;
2307 unsigned int loop_count = 0;
2308 unsigned int mask_len, i;
2309 int result;
2310 struct smb_request *req;
2311 unsigned char *name_buf;
2312 static struct qstr star = {
2313 .name = "*",
2314 .len = 1,
2315 };
2316
2317 lock_kernel();
2318
2319 /*
2320 * We always prefer unix style. Use info level 1 for older
2321 * servers that don't do 260.
2322 */
2323 if (server->opt.capabilities & SMB_CAP_UNIX)
2324 info_level = SMB_FIND_FILE_UNIX;
2325 else if (server->opt.protocol < SMB_PROTOCOL_NT1)
2326 info_level = 1;
2327
2328 result = -ENOMEM;
2329 if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL)))
2330 goto out;
2331 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
2332 goto out_name;
2333 param = req->rq_buffer;
2334
2335 /*
2336 * Encode the initial path
2337 */
2338 mask = param + 12;
2339
2340 result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star);
2341 if (result <= 0)
2342 goto out_free;
2343 mask_len = result - 1; /* mask_len is strlen, not #bytes */
2344 result = 0;
2345 first = 1;
2346 VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask);
2347
2348 entries_seen = 2;
2349 ff_eos = 0;
2350
2351 while (ff_eos == 0) {
2352 loop_count += 1;
2353 if (loop_count > 10) {
2354 printk(KERN_WARNING "smb_proc_readdir_long: "
2355 "Looping in FIND_NEXT??\n");
2356 result = -EIO;
2357 break;
2358 }
2359
2360 if (first != 0) {
2361 command = TRANSACT2_FINDFIRST;
2362 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2363 WSET(param, 2, max_matches); /* max count */
2364 WSET(param, 4, SMB_CLOSE_IF_END);
2365 WSET(param, 6, info_level);
2366 DSET(param, 8, 0);
2367 } else {
2368 command = TRANSACT2_FINDNEXT;
2369
2370 VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n",
2371 ff_dir_handle, ff_lastname, mask_len, mask);
2372
2373 WSET(param, 0, ff_dir_handle); /* search handle */
2374 WSET(param, 2, max_matches); /* max count */
2375 WSET(param, 4, info_level);
2376 DSET(param, 6, 0);
2377 WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END);
2378 }
2379
2380 req->rq_trans2_command = command;
2381 req->rq_ldata = 0;
2382 req->rq_data = NULL;
2383 req->rq_lparm = 12 + mask_len + 1;
2384 req->rq_parm = param;
2385 req->rq_flags = 0;
2386 result = smb_add_request(req);
2387 if (result < 0) {
2388 PARANOIA("error=%d, breaking\n", result);
2389 break;
2390 }
2391
2392 if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
2393 /* a damn Win95 bug - sometimes it clags if you
2394 ask it too fast */
041e0e3b 2395 schedule_timeout_interruptible(msecs_to_jiffies(200));
1da177e4
LT		 2396 continue;
2397 }
2398
2399 if (req->rq_rcls != 0) {
2400 result = smb_errno(req);
2401 PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n",
2402 mask, result, req->rq_rcls, req->rq_err);
2403 break;
2404 }
2405
2406 /* parse out some important return info */
2407 if (first != 0) {
2408 ff_dir_handle = WVAL(req->rq_parm, 0);
2409 ff_searchcount = WVAL(req->rq_parm, 2);
2410 ff_eos = WVAL(req->rq_parm, 4);
2411 ff_lastname = WVAL(req->rq_parm, 8);
2412 } else {
2413 ff_searchcount = WVAL(req->rq_parm, 0);
2414 ff_eos = WVAL(req->rq_parm, 2);
2415 ff_lastname = WVAL(req->rq_parm, 6);
2416 }
2417
2418 if (ff_searchcount == 0)
2419 break;
2420
2421 /* Now we are ready to parse smb directory entries. */
2422
2423 /* point to the data bytes */
2424 p = req->rq_data;
2425 for (i = 0; i < ff_searchcount; i++) {
2426 /* make sure we stay within the buffer */
2427 if (p >= req->rq_data + req->rq_ldata) {
2428 printk(KERN_ERR "smb_proc_readdir_long: "
2429 "dirent pointer outside buffer! "
2430 "%p %d@%p\n",
2431 p, req->rq_ldata, req->rq_data);
2432 result = -EIO; /* always a comm. error? */
2433 goto out_free;
2434 }
2435
2436 p = smb_decode_long_dirent(server, p, info_level,
2437 &qname, &fattr, name_buf);
2438
2439 /* ignore . and .. from the server */
2440 if (entries_seen == 2 && qname.name[0] == '.') {
2441 if (qname.len == 1)
2442 continue;
2443 if (qname.name[1] == '.' && qname.len == 2)
2444 continue;
2445 }
2446
2447 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2448 &qname, &fattr))
2449 ; /* stop reading? */
2450 entries_seen++;
2451 }
2452
2453 VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos);
2454
2455 /*
2456 * We might need the lastname for continuations.
2457 *
2458 * Note that some servers (win95?) point to the filename and
2459 * others (NT4, Samba using NT1) to the dir entry. We assume
2460 * here that those who do not point to a filename do not need
2461 * this info to continue the listing.
2462 *
2463 * OS/2 needs this and talks infolevel 1.
2464 * NetApps want lastname with infolevel 260.
2465 * win2k want lastname with infolevel 260, and points to
2466 * the record not to the name.
2467 * Samba+CifsUnixExt doesn't need lastname.
2468 *
2469 * Both are happy if we return the data they point to. So we do.
2470 * (FIXME: above is not true with win2k)
2471 */
2472 mask_len = 0;
2473 if (info_level != SMB_FIND_FILE_UNIX &&
2474 ff_lastname > 0 && ff_lastname < req->rq_ldata) {
2475 lastname = req->rq_data + ff_lastname;
2476
2477 switch (info_level) {
2478 case 260:
2479 mask_len = req->rq_ldata - ff_lastname;
2480 break;
2481 case 1:
2482 /* lastname points to a length byte */
2483 mask_len = *lastname++;
2484 if (ff_lastname + 1 + mask_len > req->rq_ldata)
2485 mask_len = req->rq_ldata - ff_lastname - 1;
2486 break;
2487 }
2488
2489 /*
2490 * Update the mask string for the next message.
2491 */
2492 if (mask_len > 255)
2493 mask_len = 255;
2494 if (mask_len)
2495 strncpy(mask, lastname, mask_len);
2496 }
2497 mask_len = strnlen(mask, mask_len);
2498 VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n",
2499 mask_len, ff_lastname, req->rq_ldata, mask_len, mask);
2500
2501 first = 0;
2502 loop_count = 0;
2503 }
2504
2505out_free:
2506 smb_rput(req);
2507out_name:
2508 kfree(name_buf);
2509out:
2510 unlock_kernel();
2511 return result;
2512}
2513
2514/*
2515 * This version uses the trans2 TRANSACT2_FINDFIRST message
2516 * to get the attribute data.
2517 *
2518 * Bugs Noted:
2519 */
2520static int
2521smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
2522 struct smb_fattr *fattr)
2523{
2524 char *param, *mask;
2525 __u16 date, time;
2526 int mask_len, result;
2527 struct smb_request *req;
2528
2529 result = -ENOMEM;
2530 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2531 goto out;
2532 param = req->rq_buffer;
2533 mask = param + 12;
2534
2535 mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL);
2536 if (mask_len < 0) {
2537 result = mask_len;
2538 goto out_free;
2539 }
2540 VERBOSE("name=%s, len=%d\n", mask, mask_len);
2541 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2542 WSET(param, 2, 1); /* max count */
2543 WSET(param, 4, 1); /* close after this call */
2544 WSET(param, 6, 1); /* info_level */
2545 DSET(param, 8, 0);
2546
2547 req->rq_trans2_command = TRANSACT2_FINDFIRST;
2548 req->rq_ldata = 0;
2549 req->rq_data = NULL;
2550 req->rq_lparm = 12 + mask_len;
2551 req->rq_parm = param;
2552 req->rq_flags = 0;
2553 result = smb_add_request(req);
2554 if (result < 0)
2555 goto out_free;
2556 if (req->rq_rcls != 0) {
2557 result = smb_errno(req);
2558#ifdef SMBFS_PARANOIA
2559 if (result != -ENOENT)
2560 PARANOIA("error for %s, rcls=%d, err=%d\n",
2561 mask, req->rq_rcls, req->rq_err);
2562#endif
2563 goto out_free;
2564 }
2565 /* Make sure we got enough data ... */
2566 result = -EINVAL;
2567 if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) {
2568 PARANOIA("bad result for %s, len=%d, count=%d\n",
2569 mask, req->rq_ldata, WVAL(req->rq_parm, 2));
2570 goto out_free;
2571 }
2572
2573 /*
2574 * Decode the response into the fattr ...
2575 */
2576 date = WVAL(req->rq_data, 0);
2577 time = WVAL(req->rq_data, 2);
2578 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2579 fattr->f_ctime.tv_nsec = 0;
2580
2581 date = WVAL(req->rq_data, 4);
2582 time = WVAL(req->rq_data, 6);
2583 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2584 fattr->f_atime.tv_nsec = 0;
2585
2586 date = WVAL(req->rq_data, 8);
2587 time = WVAL(req->rq_data, 10);
2588 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2589 fattr->f_mtime.tv_nsec = 0;
2590 VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
dbaf4c02 2591 mask, date, time, fattr->f_mtime.tv_sec);
1da177e4
LT		 2592 fattr->f_size = DVAL(req->rq_data, 12);
2593 /* ULONG allocation size */
2594 fattr->attr = WVAL(req->rq_data, 20);
2595 result = 0;
2596
2597out_free:
2598 smb_rput(req);
2599out:
2600 return result;
2601}
2602
2603static int
2604smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
2605 struct smb_fattr *fattr)
2606{
2607 int result;
2608 char *p;
2609 struct smb_request *req;
2610
2611 result = -ENOMEM;
2612 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2613 goto out;
2614
2615 p = smb_setup_header(req, SMBgetatr, 0, 0);
2616 result = smb_simple_encode_path(req, &p, dir, NULL);
2617 if (result < 0)
2618 goto out_free;
2619 smb_setup_bcc(req, p);
2620
2621 if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0)
2622 goto out_free;
2623 fattr->attr = WVAL(req->rq_header, smb_vwv0);
2624 fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1));
2625 fattr->f_mtime.tv_nsec = 0;
2626 fattr->f_size = DVAL(req->rq_header, smb_vwv3);
2627 fattr->f_ctime = fattr->f_mtime;
2628 fattr->f_atime = fattr->f_mtime;
2629#ifdef SMBFS_DEBUG_TIMESTAMP
2630 printk("getattr_core: %s/%s, mtime=%ld\n",
2631 DENTRY_PATH(dir), fattr->f_mtime);
2632#endif
2633 result = 0;
2634
2635out_free:
2636 smb_rput(req);
2637out:
2638 return result;
2639}
2640
2641/*
2642 * Bugs Noted:
2643 * (1) Win 95 swaps the date and time fields in the standard info level.
2644 */
2645static int
2646smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir,
2647 struct smb_request *req, int infolevel)
2648{
2649 char *p, *param;
2650 int result;
2651
2652 param = req->rq_buffer;
2653 WSET(param, 0, infolevel);
2654 DSET(param, 2, 0);
2655 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
2656 if (result < 0)
2657 goto out;
2658 p = param + 6 + result;
2659
2660 req->rq_trans2_command = TRANSACT2_QPATHINFO;
2661 req->rq_ldata = 0;
2662 req->rq_data = NULL;
2663 req->rq_lparm = p - param;
2664 req->rq_parm = param;
2665 req->rq_flags = 0;
2666 result = smb_add_request(req);
2667 if (result < 0)
2668 goto out;
2669 if (req->rq_rcls != 0) {
2670 VERBOSE("for %s: result=%d, rcls=%d, err=%d\n",
2671 &param[6], result, req->rq_rcls, req->rq_err);
2672 result = smb_errno(req);
2673 goto out;
2674 }
2675 result = -ENOENT;
2676 if (req->rq_ldata < 22) {
2677 PARANOIA("not enough data for %s, len=%d\n",
2678 &param[6], req->rq_ldata);
2679 goto out;
2680 }
2681
2682 result = 0;
2683out:
2684 return result;
2685}
2686
2687static int
2688smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir,
2689 struct smb_fattr *attr)
2690{
2691 u16 date, time;
2692 int off_date = 0, off_time = 2;
2693 int result;
2694 struct smb_request *req;
2695
2696 result = -ENOMEM;
2697 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2698 goto out;
2699
2700 result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD);
2701 if (result < 0)
2702 goto out_free;
2703
2704 /*
2705 * Kludge alert: Win 95 swaps the date and time field,
2706 * contrary to the CIFS docs and Win NT practice.
2707 */
2708 if (server->mnt->flags & SMB_MOUNT_WIN95) {
2709 off_date = 2;
2710 off_time = 0;
2711 }
2712 date = WVAL(req->rq_data, off_date);
2713 time = WVAL(req->rq_data, off_time);
2714 attr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2715 attr->f_ctime.tv_nsec = 0;
2716
2717 date = WVAL(req->rq_data, 4 + off_date);
2718 time = WVAL(req->rq_data, 4 + off_time);
2719 attr->f_atime.tv_sec = date_dos2unix(server, date, time);
2720 attr->f_atime.tv_nsec = 0;
2721
2722 date = WVAL(req->rq_data, 8 + off_date);
2723 time = WVAL(req->rq_data, 8 + off_time);
2724 attr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2725 attr->f_mtime.tv_nsec = 0;
2726#ifdef SMBFS_DEBUG_TIMESTAMP
2727 printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
2728 DENTRY_PATH(dir), date, time, attr->f_mtime);
2729#endif
2730 attr->f_size = DVAL(req->rq_data, 12);
2731 attr->attr = WVAL(req->rq_data, 20);
2732
2733out_free:
2734 smb_rput(req);
2735out:
2736 return result;
2737}
2738
2739static int
2740smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir,
2741 struct smb_fattr *attr)
2742{
2743 struct smb_request *req;
2744 int result;
2745
2746 result = -ENOMEM;
2747 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2748 goto out;
2749
2750 result = smb_proc_getattr_trans2(server, dir, req,
2751 SMB_QUERY_FILE_ALL_INFO);
2752 if (result < 0)
2753 goto out_free;
2754
2755 attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0));
2756 attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8));
2757 attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16));
2758 /* change (24) */
2759 attr->attr = WVAL(req->rq_data, 32);
2760 /* pad? (34) */
2761 /* allocated size (40) */
2762 attr->f_size = LVAL(req->rq_data, 48);
2763
2764out_free:
2765 smb_rput(req);
2766out:
2767 return result;
2768}
2769
2770static int
2771smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir,
2772 struct smb_fattr *attr)
2773{
2774 struct smb_request *req;
2775 int result;
2776
2777 result = -ENOMEM;
2778 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2779 goto out;
2780
2781 result = smb_proc_getattr_trans2(server, dir, req,
2782 SMB_QUERY_FILE_UNIX_BASIC);
2783 if (result < 0)
2784 goto out_free;
2785
2786 smb_decode_unix_basic(attr, server, req->rq_data);
2787
2788out_free:
2789 smb_rput(req);
2790out:
2791 return result;
2792}
2793
2794static int
2795smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir,
2796 struct smb_fattr *attr)
2797{
2798 struct inode *inode = dir->d_inode;
2799 int result;
2800
2801 /* FIXME: why not use the "all" version? */
2802 result = smb_proc_getattr_trans2_std(server, dir, attr);
2803 if (result < 0)
2804 goto out;
2805
2806 /*
2807 * None of the getattr versions here can make win9x return the right
2808 * filesize if there are changes made to an open file.
2809 * A seek-to-end does return the right size, but we only need to do
2810 * that on files we have written.
2811 */
2812 if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE &&
2813 smb_is_open(inode))
2814 {
2815 __u16 fileid = SMB_I(inode)->fileid;
2816 attr->f_size = smb_proc_seek(server, fileid, 2, 0);
2817 }
2818
2819out:
2820 return result;
2821}
2822
2823static int
2824smb_proc_ops_wait(struct smb_sb_info *server)
2825{
2826 int result;
2827
2828 result = wait_event_interruptible_timeout(server->conn_wq,
2829 server->conn_complete, 30*HZ);
2830
2831 if (!result || signal_pending(current))
2832 return -EIO;
2833
2834 return 0;
2835}
2836
2837static int
2838smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir,
2839 struct smb_fattr *fattr)
2840{
2841 int result;
2842
2843 if (smb_proc_ops_wait(server) < 0)
2844 return -EIO;
2845
2846 smb_init_dirent(server, fattr);
2847 result = server->ops->getattr(server, dir, fattr);
2848 smb_finish_dirent(server, fattr);
2849
2850 return result;
2851}
2852
2853static int
2854smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir,
2855 struct smb_cache_control *ctl)
2856{
17b75e69 2857 struct smb_sb_info *server = server_from_dentry(filp->f_path.dentry);
1da177e4
LT		 2858
2859 if (smb_proc_ops_wait(server) < 0)
2860 return -EIO;
2861
2862 return server->ops->readdir(filp, dirent, filldir, ctl);
2863}
2864
2865int
2866smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
2867{
2868 struct smb_sb_info *server = server_from_dentry(dir);
2869 int result;
2870
2871 smb_init_dirent(server, fattr);
2872 result = server->ops->getattr(server, dir, fattr);
2873 smb_finish_dirent(server, fattr);
2874
2875 return result;
2876}
2877
2878
2879/*
2880 * Because of bugs in the core protocol, we use this only to set
2881 * attributes. See smb_proc_settime() below for timestamp handling.
2882 *
2883 * Bugs Noted:
2884 * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail
2885 * with an undocumented error (ERRDOS code 50). Setting
2886 * mtime to 0 allows the attributes to be set.
2887 * (2) The extra parameters following the name string aren't
2888 * in the CIFS docs, but seem to be necessary for operation.
2889 */
2890static int
2891smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
2892 __u16 attr)
2893{
2894 char *p;
2895 int result;
2896 struct smb_request *req;
2897
2898 result = -ENOMEM;
2899 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2900 goto out;
2901
2902 p = smb_setup_header(req, SMBsetatr, 8, 0);
2903 WSET(req->rq_header, smb_vwv0, attr);
2904 DSET(req->rq_header, smb_vwv1, 0); /* mtime */
2905 WSET(req->rq_header, smb_vwv3, 0); /* reserved values */
2906 WSET(req->rq_header, smb_vwv4, 0);
2907 WSET(req->rq_header, smb_vwv5, 0);
2908 WSET(req->rq_header, smb_vwv6, 0);
2909 WSET(req->rq_header, smb_vwv7, 0);
2910 result = smb_simple_encode_path(req, &p, dentry, NULL);
2911 if (result < 0)
2912 goto out_free;
2913 if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) {
2914 result = -ENAMETOOLONG;
2915 goto out_free;
2916 }
2917 *p++ = 4;
2918 *p++ = 0;
2919 smb_setup_bcc(req, p);
2920
2921 result = smb_request_ok(req, SMBsetatr, 0, 0);
2922 if (result < 0)
2923 goto out_free;
2924 result = 0;
2925
2926out_free:
2927 smb_rput(req);
2928out:
2929 return result;
2930}
2931
2932/*
2933 * Because of bugs in the trans2 setattr messages, we must set
2934 * attributes and timestamps separately. The core SMBsetatr
2935 * message seems to be the only reliable way to set attributes.
2936 */
2937int
2938smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr)
2939{
2940 struct smb_sb_info *server = server_from_dentry(dir);
2941 int result;
2942
2943 VERBOSE("setting %s/%s, open=%d\n",
2944 DENTRY_PATH(dir), smb_is_open(dir->d_inode));
2945 result = smb_proc_setattr_core(server, dir, fattr->attr);
2946 return result;
2947}
2948
2949/*
2950 * Sets the timestamps for an file open with write permissions.
2951 */
2952static int
2953smb_proc_setattr_ext(struct smb_sb_info *server,
2954 struct inode *inode, struct smb_fattr *fattr)
2955{
2956 __u16 date, time;
2957 int result;
2958 struct smb_request *req;
2959
2960 result = -ENOMEM;
2961 if (! (req = smb_alloc_request(server, 0)))
2962 goto out;
2963
2964 smb_setup_header(req, SMBsetattrE, 7, 0);
2965 WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid);
2966 /* We don't change the creation time */
2967 WSET(req->rq_header, smb_vwv1, 0);
2968 WSET(req->rq_header, smb_vwv2, 0);
2969 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
2970 WSET(req->rq_header, smb_vwv3, date);
2971 WSET(req->rq_header, smb_vwv4, time);
2972 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
2973 WSET(req->rq_header, smb_vwv5, date);
2974 WSET(req->rq_header, smb_vwv6, time);
2975#ifdef SMBFS_DEBUG_TIMESTAMP
2976 printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n",
2977 date, time, fattr->f_mtime);
2978#endif
2979
2980 req->rq_flags |= SMB_REQ_NORETRY;
2981 result = smb_request_ok(req, SMBsetattrE, 0, 0);
2982 if (result < 0)
2983 goto out_free;
2984 result = 0;
2985out_free:
2986 smb_rput(req);
2987out:
2988 return result;
2989}
2990
2991/*
2992 * Bugs Noted:
2993 * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't
2994 * set the file's attribute flags.
2995 */
2996static int
2997smb_proc_setattr_trans2(struct smb_sb_info *server,
2998 struct dentry *dir, struct smb_fattr *fattr)
2999{
3000 __u16 date, time;
3001 char *p, *param;
3002 int result;
3003 char data[26];
3004 struct smb_request *req;
3005
3006 result = -ENOMEM;
3007 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3008 goto out;
3009 param = req->rq_buffer;
3010
3011 WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */
3012 DSET(param, 2, 0);
3013 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
3014 if (result < 0)
3015 goto out_free;
3016 p = param + 6 + result;
3017
3018 WSET(data, 0, 0); /* creation time */
3019 WSET(data, 2, 0);
3020 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
3021 WSET(data, 4, date);
3022 WSET(data, 6, time);
3023 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
3024 WSET(data, 8, date);
3025 WSET(data, 10, time);
3026#ifdef SMBFS_DEBUG_TIMESTAMP
3027 printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
3028 DENTRY_PATH(dir), date, time, fattr->f_mtime);
3029#endif
3030 DSET(data, 12, 0); /* size */
3031 DSET(data, 16, 0); /* blksize */
3032 WSET(data, 20, 0); /* attr */
3033 DSET(data, 22, 0); /* ULONG EA size */
3034
3035 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3036 req->rq_ldata = 26;
3037 req->rq_data = data;
3038 req->rq_lparm = p - param;
3039 req->rq_parm = param;
3040 req->rq_flags = 0;
3041 result = smb_add_request(req);
3042 if (result < 0)
3043 goto out_free;
3044 result = 0;
3045 if (req->rq_rcls != 0)
3046 result = smb_errno(req);
3047
3048out_free:
3049 smb_rput(req);
3050out:
3051 return result;
3052}
3053
3054/*
3055 * ATTR_MODE 0x001
3056 * ATTR_UID 0x002
3057 * ATTR_GID 0x004
3058 * ATTR_SIZE 0x008
3059 * ATTR_ATIME 0x010
3060 * ATTR_MTIME 0x020
3061 * ATTR_CTIME 0x040
3062 * ATTR_ATIME_SET 0x080
3063 * ATTR_MTIME_SET 0x100
3064 * ATTR_FORCE 0x200
3065 * ATTR_ATTR_FLAG 0x400
3066 *
3067 * major/minor should only be set by mknod.
3068 */
3069int
3070smb_proc_setattr_unix(struct dentry *d, struct iattr *attr,
3071 unsigned int major, unsigned int minor)
3072{
3073 struct smb_sb_info *server = server_from_dentry(d);
3074 u64 nttime;
3075 char *p, *param;
3076 int result;
3077 char data[100];
3078 struct smb_request *req;
3079
3080 result = -ENOMEM;
3081 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3082 goto out;
3083 param = req->rq_buffer;
3084
3085 DEBUG1("valid flags = 0x%04x\n", attr->ia_valid);
3086
3087 WSET(param, 0, SMB_SET_FILE_UNIX_BASIC);
3088 DSET(param, 2, 0);
3089 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3090 if (result < 0)
3091 goto out_free;
3092 p = param + 6 + result;
3093
3094 /* 0 L file size in bytes */
3095 /* 8 L file size on disk in bytes (block count) */
3096 /* 40 L uid */
3097 /* 48 L gid */
3098 /* 56 W file type enum */
3099 /* 60 L devmajor */
3100 /* 68 L devminor */
3101 /* 76 L unique ID (inode) */
3102 /* 84 L permissions */
3103 /* 92 L link count */
3104 LSET(data, 0, SMB_SIZE_NO_CHANGE);
3105 LSET(data, 8, SMB_SIZE_NO_CHANGE);
3106 LSET(data, 16, SMB_TIME_NO_CHANGE);
3107 LSET(data, 24, SMB_TIME_NO_CHANGE);
3108 LSET(data, 32, SMB_TIME_NO_CHANGE);
3109 LSET(data, 40, SMB_UID_NO_CHANGE);
3110 LSET(data, 48, SMB_GID_NO_CHANGE);
ac34dd05 3111 DSET(data, 56, smb_filetype_from_mode(attr->ia_mode));
1da177e4
LT		 3112 LSET(data, 60, major);
3113 LSET(data, 68, minor);
3114 LSET(data, 76, 0);
3115 LSET(data, 84, SMB_MODE_NO_CHANGE);
3116 LSET(data, 92, 0);
3117
3118 if (attr->ia_valid & ATTR_SIZE) {
3119 LSET(data, 0, attr->ia_size);
3120 LSET(data, 8, 0); /* can't set anyway */
3121 }
3122
3123 /*
3124 * FIXME: check the conversion function it the correct one
3125 *
3126 * we can't set ctime but we might as well pass this to the server
3127 * and let it ignore it.
3128 */
3129 if (attr->ia_valid & ATTR_CTIME) {
3130 nttime = smb_unixutc2ntutc(attr->ia_ctime);
3131 LSET(data, 16, nttime);
3132 }
3133 if (attr->ia_valid & ATTR_ATIME) {
3134 nttime = smb_unixutc2ntutc(attr->ia_atime);
3135 LSET(data, 24, nttime);
3136 }
3137 if (attr->ia_valid & ATTR_MTIME) {
3138 nttime = smb_unixutc2ntutc(attr->ia_mtime);
3139 LSET(data, 32, nttime);
3140 }
3141
3142 if (attr->ia_valid & ATTR_UID) {
3143 LSET(data, 40, attr->ia_uid);
3144 }
3145 if (attr->ia_valid & ATTR_GID) {
3146 LSET(data, 48, attr->ia_gid);
3147 }
3148
3149 if (attr->ia_valid & ATTR_MODE) {
3150 LSET(data, 84, attr->ia_mode);
3151 }
3152
3153 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3154 req->rq_ldata = 100;
3155 req->rq_data = data;
3156 req->rq_lparm = p - param;
3157 req->rq_parm = param;
3158 req->rq_flags = 0;
3159 result = smb_add_request(req);
3160
3161out_free:
3162 smb_rput(req);
3163out:
3164 return result;
3165}
3166
3167
3168/*
3169 * Set the modify and access timestamps for a file.
3170 *
3171 * Incredibly enough, in all of SMB there is no message to allow
3172 * setting both attributes and timestamps at once.
3173 *
3174 * Bugs Noted:
3175 * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message
3176 * with info level 1 (INFO_STANDARD).
3177 * (2) Win 95 seems not to support setting directory timestamps.
3178 * (3) Under the core protocol apparently the only way to set the
3179 * timestamp is to open and close the file.
3180 */
3181int
3182smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
3183{
3184 struct smb_sb_info *server = server_from_dentry(dentry);
3185 struct inode *inode = dentry->d_inode;
3186 int result;
3187
3188 VERBOSE("setting %s/%s, open=%d\n",
3189 DENTRY_PATH(dentry), smb_is_open(inode));
3190
3191 /* setting the time on a Win95 server fails (tridge) */
3192 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 &&
3193 !(server->mnt->flags & SMB_MOUNT_WIN95)) {
3194 if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY)
3195 result = smb_proc_setattr_ext(server, inode, fattr);
3196 else
3197 result = smb_proc_setattr_trans2(server, dentry, fattr);
3198 } else {
3199 /*
3200 * Fail silently on directories ... timestamp can't be set?
3201 */
3202 result = 0;
3203 if (S_ISREG(inode->i_mode)) {
3204 /*
3205 * Set the mtime by opening and closing the file.
3206 * Note that the file is opened read-only, but this
3207 * still allows us to set the date (tridge)
3208 */
3209 result = -EACCES;
3210 if (!smb_is_open(inode))
3211 smb_proc_open(server, dentry, SMB_O_RDONLY);
3212 if (smb_is_open(inode)) {
3213 inode->i_mtime = fattr->f_mtime;
3214 result = smb_proc_close_inode(server, inode);
3215 }
3216 }
3217 }
3218
3219 return result;
3220}
3221
3222int
726c3342 3223smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
1da177e4 3224{
726c3342 3225 struct smb_sb_info *server = SMB_SB(dentry->d_sb);
1da177e4
LT		 3226 int result;
3227 char *p;
3228 long unit;
3229 struct smb_request *req;
3230
3231 result = -ENOMEM;
3232 if (! (req = smb_alloc_request(server, 0)))
3233 goto out;
3234
3235 smb_setup_header(req, SMBdskattr, 0, 0);
3236 if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0)
3237 goto out_free;
3238 p = SMB_VWV(req->rq_header);
3239 unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT;
3240 attr->f_blocks = WVAL(p, 0) * unit;
3241 attr->f_bsize = SMB_ST_BLKSIZE;
3242 attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit;
3243 result = 0;
3244
3245out_free:
3246 smb_rput(req);
3247out:
3248 return result;
3249}
3250
3251int
3252smb_proc_read_link(struct smb_sb_info *server, struct dentry *d,
3253 char *buffer, int len)
3254{
3255 char *p, *param;
3256 int result;
3257 struct smb_request *req;
3258
3259 DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d));
3260
3261 result = -ENOMEM;
3262 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3263 goto out;
3264 param = req->rq_buffer;
3265
3266 WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK);
3267 DSET(param, 2, 0);
3268 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3269 if (result < 0)
3270 goto out_free;
3271 p = param + 6 + result;
3272
3273 req->rq_trans2_command = TRANSACT2_QPATHINFO;
3274 req->rq_ldata = 0;
3275 req->rq_data = NULL;
3276 req->rq_lparm = p - param;
3277 req->rq_parm = param;
3278 req->rq_flags = 0;
3279 result = smb_add_request(req);
3280 if (result < 0)
3281 goto out_free;
3282 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3283 &param[6], result, req->rq_rcls, req->rq_err);
3284
3285 /* copy data up to the \0 or buffer length */
3286 result = len;
3287 if (req->rq_ldata < len)
3288 result = req->rq_ldata;
3289 strncpy(buffer, req->rq_data, result);
3290
3291out_free:
3292 smb_rput(req);
3293out:
3294 return result;
3295}
3296
3297
3298/*
3299 * Create a symlink object called dentry which points to oldpath.
3300 * Samba does not permit dangling links but returns a suitable error message.
3301 */
3302int
3303smb_proc_symlink(struct smb_sb_info *server, struct dentry *d,
3304 const char *oldpath)
3305{
3306 char *p, *param;
3307 int result;
3308 struct smb_request *req;
3309
3310 result = -ENOMEM;
3311 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3312 goto out;
3313 param = req->rq_buffer;
3314
3315 WSET(param, 0, SMB_SET_FILE_UNIX_LINK);
3316 DSET(param, 2, 0);
3317 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL);
3318 if (result < 0)
3319 goto out_free;
3320 p = param + 6 + result;
3321
3322 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3323 req->rq_ldata = strlen(oldpath) + 1;
3324 req->rq_data = (char *) oldpath;
3325 req->rq_lparm = p - param;
3326 req->rq_parm = param;
3327 req->rq_flags = 0;
3328 result = smb_add_request(req);
3329 if (result < 0)
3330 goto out_free;
3331
3332 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3333 &param[6], result, req->rq_rcls, req->rq_err);
3334 result = 0;
3335
3336out_free:
3337 smb_rput(req);
3338out:
3339 return result;
3340}
3341
3342/*
3343 * Create a hard link object called new_dentry which points to dentry.
3344 */
3345int
3346smb_proc_link(struct smb_sb_info *server, struct dentry *dentry,
3347 struct dentry *new_dentry)
3348{
3349 char *p, *param;
3350 int result;
3351 struct smb_request *req;
3352
3353 result = -ENOMEM;
3354 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3355 goto out;
3356 param = req->rq_buffer;
3357
3358 WSET(param, 0, SMB_SET_FILE_UNIX_HLINK);
3359 DSET(param, 2, 0);
3360 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1,
3361 new_dentry, NULL);
3362 if (result < 0)
3363 goto out_free;
3364 p = param + 6 + result;
3365
3366 /* Grr, pointless separation of parameters and data ... */
3367 req->rq_data = p;
3368 req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1,
3369 dentry, NULL);
3370
3371 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3372 req->rq_lparm = p - param;
3373 req->rq_parm = param;
3374 req->rq_flags = 0;
3375 result = smb_add_request(req);
3376 if (result < 0)
3377 goto out_free;
3378
3379 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3380 &param[6], result, req->rq_rcls, req->rq_err);
3381 result = 0;
3382
3383out_free:
3384 smb_rput(req);
3385out:
3386 return result;
3387}
3388
3389static int
3390smb_proc_query_cifsunix(struct smb_sb_info *server)
3391{
3392 int result;
3393 int major, minor;
3394 u64 caps;
3395 char param[2];
3396 struct smb_request *req;
3397
3398 result = -ENOMEM;
3399 if (! (req = smb_alloc_request(server, 100)))
3400 goto out;
3401
3402 WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO);
3403
3404 req->rq_trans2_command = TRANSACT2_QFSINFO;
3405 req->rq_ldata = 0;
3406 req->rq_data = NULL;
3407 req->rq_lparm = 2;
3408 req->rq_parm = param;
3409 req->rq_flags = 0;
3410 result = smb_add_request(req);
3411 if (result < 0)
3412 goto out_free;
3413
3414 if (req->rq_ldata < 12) {
3415 PARANOIA("Not enough data\n");
3416 goto out_free;
3417 }
3418 major = WVAL(req->rq_data, 0);
3419 minor = WVAL(req->rq_data, 2);
3420
3421 DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n",
3422 major, minor);
3423 /* FIXME: verify that we are ok with this major/minor? */
3424
3425 caps = LVAL(req->rq_data, 4);
3426 DEBUG1("Server capabilities 0x%016llx\n", caps);
3427
3428out_free:
3429 smb_rput(req);
3430out:
3431 return result;
3432}
3433
3434
3435static void
3436install_ops(struct smb_ops *dst, struct smb_ops *src)
3437{
3438 memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC);
3439}
3440
3441/* < LANMAN2 */
3442static struct smb_ops smb_ops_core =
3443{
3444 .read = smb_proc_read,
3445 .write = smb_proc_write,
3446 .readdir = smb_proc_readdir_short,
3447 .getattr = smb_proc_getattr_core,
3448 .truncate = smb_proc_trunc32,
3449};
3450
3451/* LANMAN2, OS/2, others? */
3452static struct smb_ops smb_ops_os2 =
3453{
3454 .read = smb_proc_read,
3455 .write = smb_proc_write,
3456 .readdir = smb_proc_readdir_long,
3457 .getattr = smb_proc_getattr_trans2_std,
3458 .truncate = smb_proc_trunc32,
3459};
3460
3461/* Win95, and possibly some NetApp versions too */
3462static struct smb_ops smb_ops_win95 =
3463{
3464 .read = smb_proc_read, /* does not support 12word readX */
3465 .write = smb_proc_write,
3466 .readdir = smb_proc_readdir_long,
3467 .getattr = smb_proc_getattr_95,
3468 .truncate = smb_proc_trunc95,
3469};
3470
3471/* Samba, NT4 and NT5 */
3472static struct smb_ops smb_ops_winNT =
3473{
3474 .read = smb_proc_readX,
3475 .write = smb_proc_writeX,
3476 .readdir = smb_proc_readdir_long,
3477 .getattr = smb_proc_getattr_trans2_all,
3478 .truncate = smb_proc_trunc64,
3479};
3480
3481/* Samba w/ unix extensions. Others? */
3482static struct smb_ops smb_ops_unix =
3483{
3484 .read = smb_proc_readX,
3485 .write = smb_proc_writeX,
3486 .readdir = smb_proc_readdir_long,
3487 .getattr = smb_proc_getattr_unix,
3488 /* FIXME: core/ext/time setattr needs to be cleaned up! */
3489 /* .setattr = smb_proc_setattr_unix, */
3490 .truncate = smb_proc_trunc64,
3491};
3492
3493/* Place holder until real ops are in place */
3494static struct smb_ops smb_ops_null =
3495{
3496 .readdir = smb_proc_readdir_null,
3497 .getattr = smb_proc_getattr_null,
3498};
3499
3500void smb_install_null_ops(struct smb_ops *ops)
3501{
3502 install_ops(ops, &smb_ops_null);
3503}
Clone of davem's net-next-2.6 tree