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Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux.git] / fs / smbfs / proc.c
CommitLineData
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);
335 spin_lock(&entry->d_lock);
336 while (!IS_ROOT(entry)) {
337 struct dentry *parent;
338
339 if (maxlen < (3<<unicode)) {
340 spin_unlock(&entry->d_lock);
341 dput(entry);
342 return -ENAMETOOLONG;
343 }
344
345 len = server->ops->convert(path, maxlen-2,
346 entry->d_name.name, entry->d_name.len,
347 server->local_nls, server->remote_nls);
348 if (len < 0) {
349 spin_unlock(&entry->d_lock);
350 dput(entry);
351 return len;
352 }
353 reverse_string(path, len);
354 path += len;
355 if (unicode) {
356 /* Note: reverse order */
357 *path++ = '\0';
358 maxlen--;
359 }
360 *path++ = '\\';
361 maxlen -= len+1;
362
363 parent = entry->d_parent;
364 dget(parent);
365 spin_unlock(&entry->d_lock);
366 dput(entry);
367 entry = parent;
368 spin_lock(&entry->d_lock);
369 }
370 spin_unlock(&entry->d_lock);
371 dput(entry);
372 reverse_string(buf, path-buf);
373
374 /* maxlen has space for at least one char */
375test_name_and_out:
376 if (name) {
377 if (maxlen < (3<<unicode))
378 return -ENAMETOOLONG;
379 *path++ = '\\';
380 if (unicode) {
381 *path++ = '\0';
382 maxlen--;
383 }
384 len = server->ops->convert(path, maxlen-2,
385 name->name, name->len,
386 server->local_nls, server->remote_nls);
387 if (len < 0)
388 return len;
389 path += len;
390 maxlen -= len+1;
391 }
392 /* maxlen has space for at least one char */
393 *path++ = '\0';
394 if (unicode) *path++ = '\0';
395 return path-buf;
396}
397
398static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen,
399 struct dentry *dir, struct qstr *name)
400{
401 int result;
402
403 result = smb_build_path(server, buf, maxlen, dir, name);
404 if (result < 0)
405 goto out;
406 if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS)
407 str_upper(buf, result);
408out:
409 return result;
410}
411
412/* encode_path for non-trans2 request SMBs */
413static int smb_simple_encode_path(struct smb_request *req, char **p,
414 struct dentry * entry, struct qstr * name)
415{
416 struct smb_sb_info *server = req->rq_server;
417 char *s = *p;
418 int res;
419 int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s;
420 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
421
422 if (!maxlen)
423 return -ENAMETOOLONG;
424 *s++ = 4; /* ASCII data format */
425
426 /*
427 * SMB Unicode strings must be 16bit aligned relative the start of the
428 * packet. If they are not they must be padded with 0.
429 */
430 if (unicode) {
431 int align = s - (char *)req->rq_buffer;
432 if (!(align & 1)) {
433 *s++ = '\0';
434 maxlen--;
435 }
436 }
437
438 res = smb_encode_path(server, s, maxlen-1, entry, name);
439 if (res < 0)
440 return res;
441 *p = s + res;
442 return 0;
443}
444
445/* The following are taken directly from msdos-fs */
446
447/* Linear day numbers of the respective 1sts in non-leap years. */
448
449static int day_n[] =
450{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
451 /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
452
453
454static time_t
455utc2local(struct smb_sb_info *server, time_t time)
456{
457 return time - server->opt.serverzone*60;
458}
459
460static time_t
461local2utc(struct smb_sb_info *server, time_t time)
462{
463 return time + server->opt.serverzone*60;
464}
465
466/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
467
468static time_t
469date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time)
470{
471 int month, year;
472 time_t secs;
473
474 /* first subtract and mask after that... Otherwise, if
475 date == 0, bad things happen */
476 month = ((date >> 5) - 1) & 15;
477 year = date >> 9;
478 secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 *
479 ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 &&
480 month < 2 ? 1 : 0) + 3653);
481 /* days since 1.1.70 plus 80's leap day */
482 return local2utc(server, secs);
483}
484
485
486/* Convert linear UNIX date to a MS-DOS time/date pair. */
487
488static void
489date_unix2dos(struct smb_sb_info *server,
490 int unix_date, __u16 *date, __u16 *time)
491{
492 int day, year, nl_day, month;
493
494 unix_date = utc2local(server, unix_date);
495 if (unix_date < 315532800)
496 unix_date = 315532800;
497
498 *time = (unix_date % 60) / 2 +
499 (((unix_date / 60) % 60) << 5) +
500 (((unix_date / 3600) % 24) << 11);
501
502 day = unix_date / 86400 - 3652;
503 year = day / 365;
504 if ((year + 3) / 4 + 365 * year > day)
505 year--;
506 day -= (year + 3) / 4 + 365 * year;
507 if (day == 59 && !(year & 3)) {
508 nl_day = day;
509 month = 2;
510 } else {
511 nl_day = (year & 3) || day <= 59 ? day : day - 1;
ca976c53 512 for (month = 1; month < 12; month++)
1da177e4
LT		 513 if (day_n[month] > nl_day)
514 break;
515 }
516 *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
517}
518
519/* The following are taken from fs/ntfs/util.c */
520
521#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
522
523/*
524 * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
525 * into Unix UTC (based 1970-01-01, in seconds).
526 */
527static struct timespec
528smb_ntutc2unixutc(u64 ntutc)
529{
530 struct timespec ts;
531 /* FIXME: what about the timezone difference? */
532 /* Subtract the NTFS time offset, then convert to 1s intervals. */
533 u64 t = ntutc - NTFS_TIME_OFFSET;
534 ts.tv_nsec = do_div(t, 10000000) * 100;
535 ts.tv_sec = t;
536 return ts;
537}
538
539/* Convert the Unix UTC into NT time */
540static u64
541smb_unixutc2ntutc(struct timespec ts)
542{
543 /* Note: timezone conversion is probably wrong. */
544 /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */
545 return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET;
546}
547
548#define MAX_FILE_MODE 6
549static mode_t file_mode[] = {
550 S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK
551};
552
553static int smb_filetype_to_mode(u32 filetype)
554{
555 if (filetype > MAX_FILE_MODE) {
556 PARANOIA("Filetype out of range: %d\n", filetype);
557 return S_IFREG;
558 }
559 return file_mode[filetype];
560}
561
562static u32 smb_filetype_from_mode(int mode)
563{
564 if (S_ISREG(mode))
565 return UNIX_TYPE_FILE;
566 if (S_ISDIR(mode))
567 return UNIX_TYPE_DIR;
568 if (S_ISLNK(mode))
569 return UNIX_TYPE_SYMLINK;
570 if (S_ISCHR(mode))
571 return UNIX_TYPE_CHARDEV;
572 if (S_ISBLK(mode))
573 return UNIX_TYPE_BLKDEV;
574 if (S_ISFIFO(mode))
575 return UNIX_TYPE_FIFO;
576 if (S_ISSOCK(mode))
577 return UNIX_TYPE_SOCKET;
578 return UNIX_TYPE_UNKNOWN;
579}
580
581
582/*****************************************************************************/
583/* */
584/* Support section. */
585/* */
586/*****************************************************************************/
587
588__u32
589smb_len(__u8 * p)
590{
591 return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3);
592}
593
594static __u16
595smb_bcc(__u8 * packet)
596{
597 int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16);
598 return WVAL(packet, pos);
599}
600
601/* smb_valid_packet: We check if packet fulfills the basic
602 requirements of a smb packet */
603
604static int
605smb_valid_packet(__u8 * packet)
606{
607 return (packet[4] == 0xff
608 && packet[5] == 'S'
609 && packet[6] == 'M'
610 && packet[7] == 'B'
611 && (smb_len(packet) + 4 == SMB_HEADER_LEN
612 + SMB_WCT(packet) * 2 + smb_bcc(packet)));
613}
614
615/* smb_verify: We check if we got the answer we expected, and if we
616 got enough data. If bcc == -1, we don't care. */
617
618static int
619smb_verify(__u8 * packet, int command, int wct, int bcc)
620{
621 if (SMB_CMD(packet) != command)
622 goto bad_command;
623 if (SMB_WCT(packet) < wct)
624 goto bad_wct;
625 if (bcc != -1 && smb_bcc(packet) < bcc)
626 goto bad_bcc;
627 return 0;
628
629bad_command:
630 printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n",
631 command, SMB_CMD(packet));
632 goto fail;
633bad_wct:
634 printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n",
635 command, wct, SMB_WCT(packet));
636 goto fail;
637bad_bcc:
638 printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n",
639 command, bcc, smb_bcc(packet));
640fail:
641 return -EIO;
642}
643
644/*
645 * Returns the maximum read or write size for the "payload". Making all of the
646 * packet fit within the negotiated max_xmit size.
647 *
648 * N.B. Since this value is usually computed before locking the server,
649 * the server's packet size must never be decreased!
650 */
651static inline int
652smb_get_xmitsize(struct smb_sb_info *server, int overhead)
653{
654 return server->opt.max_xmit - overhead;
655}
656
657/*
658 * Calculate the maximum read size
659 */
660int
661smb_get_rsize(struct smb_sb_info *server)
662{
663 /* readX has 12 parameters, read has 5 */
664 int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2;
665 int size = smb_get_xmitsize(server, overhead);
666
667 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
668
669 return size;
670}
671
672/*
673 * Calculate the maximum write size
674 */
675int
676smb_get_wsize(struct smb_sb_info *server)
677{
678 /* writeX has 14 parameters, write has 5 */
679 int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2;
680 int size = smb_get_xmitsize(server, overhead);
681
682 VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
683
684 return size;
685}
686
687/*
688 * Convert SMB error codes to -E... errno values.
689 */
690int
691smb_errno(struct smb_request *req)
692{
693 int errcls = req->rq_rcls;
694 int error = req->rq_err;
695 char *class = "Unknown";
696
697 VERBOSE("errcls %d code %d from command 0x%x\n",
698 errcls, error, SMB_CMD(req->rq_header));
699
700 if (errcls == ERRDOS) {
701 switch (error) {
702 case ERRbadfunc:
703 return -EINVAL;
704 case ERRbadfile:
705 case ERRbadpath:
706 return -ENOENT;
707 case ERRnofids:
708 return -EMFILE;
709 case ERRnoaccess:
710 return -EACCES;
711 case ERRbadfid:
712 return -EBADF;
713 case ERRbadmcb:
714 return -EREMOTEIO;
715 case ERRnomem:
716 return -ENOMEM;
717 case ERRbadmem:
718 return -EFAULT;
719 case ERRbadenv:
720 case ERRbadformat:
721 return -EREMOTEIO;
722 case ERRbadaccess:
723 return -EACCES;
724 case ERRbaddata:
725 return -E2BIG;
726 case ERRbaddrive:
727 return -ENXIO;
728 case ERRremcd:
729 return -EREMOTEIO;
730 case ERRdiffdevice:
731 return -EXDEV;
732 case ERRnofiles:
733 return -ENOENT;
734 case ERRbadshare:
735 return -ETXTBSY;
736 case ERRlock:
737 return -EDEADLK;
738 case ERRfilexists:
739 return -EEXIST;
740 case ERROR_INVALID_PARAMETER:
741 return -EINVAL;
742 case ERROR_DISK_FULL:
743 return -ENOSPC;
744 case ERROR_INVALID_NAME:
745 return -ENOENT;
746 case ERROR_DIR_NOT_EMPTY:
747 return -ENOTEMPTY;
748 case ERROR_NOT_LOCKED:
749 return -ENOLCK;
750 case ERROR_ALREADY_EXISTS:
751 return -EEXIST;
752 default:
753 class = "ERRDOS";
754 goto err_unknown;
755 }
756 } else if (errcls == ERRSRV) {
757 switch (error) {
758 /* N.B. This is wrong ... EIO ? */
759 case ERRerror:
760 return -ENFILE;
761 case ERRbadpw:
762 return -EINVAL;
763 case ERRbadtype:
764 case ERRtimeout:
765 return -EIO;
766 case ERRaccess:
767 return -EACCES;
768 /*
769 * This is a fatal error, as it means the "tree ID"
770 * for this connection is no longer valid. We map
771 * to a special error code and get a new connection.
772 */
773 case ERRinvnid:
774 return -EBADSLT;
775 default:
776 class = "ERRSRV";
777 goto err_unknown;
778 }
779 } else if (errcls == ERRHRD) {
780 switch (error) {
781 case ERRnowrite:
782 return -EROFS;
783 case ERRbadunit:
784 return -ENODEV;
785 case ERRnotready:
786 return -EUCLEAN;
787 case ERRbadcmd:
788 case ERRdata:
789 return -EIO;
790 case ERRbadreq:
791 return -ERANGE;
792 case ERRbadshare:
793 return -ETXTBSY;
794 case ERRlock:
795 return -EDEADLK;
796 case ERRdiskfull:
797 return -ENOSPC;
798 default:
799 class = "ERRHRD";
800 goto err_unknown;
801 }
802 } else if (errcls == ERRCMD) {
803 class = "ERRCMD";
804 } else if (errcls == SUCCESS) {
805 return 0; /* This is the only valid 0 return */
806 }
807
808err_unknown:
809 printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n",
810 class, error, SMB_CMD(req->rq_header));
811 return -EIO;
812}
813
814/* smb_request_ok: We expect the server to be locked. Then we do the
815 request and check the answer completely. When smb_request_ok
816 returns 0, you can be quite sure that everything went well. When
817 the answer is <=0, the returned number is a valid unix errno. */
818
819static int
820smb_request_ok(struct smb_request *req, int command, int wct, int bcc)
821{
822 int result;
823
824 req->rq_resp_wct = wct;
825 req->rq_resp_bcc = bcc;
826
827 result = smb_add_request(req);
828 if (result != 0) {
829 DEBUG1("smb_request failed\n");
830 goto out;
831 }
832
833 if (smb_valid_packet(req->rq_header) != 0) {
834 PARANOIA("invalid packet!\n");
835 goto out;
836 }
837
838 result = smb_verify(req->rq_header, command, wct, bcc);
839
840out:
841 return result;
842}
843
844/*
845 * This implements the NEWCONN ioctl. It installs the server pid,
846 * sets server->state to CONN_VALID, and wakes up the waiting process.
847 */
848int
849smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
850{
851 struct file *filp;
852 struct sock *sk;
853 int error;
854
855 VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid);
856
857 smb_lock_server(server);
858
859 /*
860 * Make sure we don't already have a valid connection ...
861 */
862 error = -EINVAL;
863 if (server->state == CONN_VALID)
864 goto out;
865
866 error = -EACCES;
e2950b17 867 if (current_uid() != server->mnt->mounted_uid &&
1da177e4
LT		 868 !capable(CAP_SYS_ADMIN))
869 goto out;
870
871 error = -EBADF;
872 filp = fget(opt->fd);
873 if (!filp)
874 goto out;
17b75e69 875 if (!smb_valid_socket(filp->f_path.dentry->d_inode))
1da177e4
LT		 876 goto out_putf;
877
878 server->sock_file = filp;
a71113da 879 server->conn_pid = get_pid(task_pid(current));
1da177e4
LT		 880 server->opt = *opt;
881 server->generation += 1;
882 server->state = CONN_VALID;
883 error = 0;
884
885 if (server->conn_error) {
886 /*
887 * conn_error is the returncode we originally decided to
888 * drop the old connection on. This message should be positive
889 * and not make people ask questions on why smbfs is printing
890 * error messages ...
891 */
892 printk(KERN_INFO "SMB connection re-established (%d)\n",
893 server->conn_error);
894 server->conn_error = 0;
895 }
896
897 /*
898 * Store the server in sock user_data (Only used by sunrpc)
899 */
17b75e69 900 sk = SOCKET_I(filp->f_path.dentry->d_inode)->sk;
1da177e4
LT		 901 sk->sk_user_data = server;
902
903 /* chain into the data_ready callback */
904 server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready);
905
906 /* check if we have an old smbmount that uses seconds for the
907 serverzone */
908 if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60)
909 server->opt.serverzone /= 60;
910
911 /* now that we have an established connection we can detect the server
912 type and enable bug workarounds */
913 if (server->opt.protocol < SMB_PROTOCOL_LANMAN2)
914 install_ops(server->ops, &smb_ops_core);
915 else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2)
916 install_ops(server->ops, &smb_ops_os2);
917 else if (server->opt.protocol == SMB_PROTOCOL_NT1 &&
918 (server->opt.max_xmit < 0x1000) &&
919 !(server->opt.capabilities & SMB_CAP_NT_SMBS)) {
920 /* FIXME: can we kill the WIN95 flag now? */
921 server->mnt->flags |= SMB_MOUNT_WIN95;
922 VERBOSE("detected WIN95 server\n");
923 install_ops(server->ops, &smb_ops_win95);
924 } else {
925 /*
926 * Samba has max_xmit 65535
927 * NT4spX has max_xmit 4536 (or something like that)
928 * win2k has ...
929 */
930 VERBOSE("detected NT1 (Samba, NT4/5) server\n");
931 install_ops(server->ops, &smb_ops_winNT);
932 }
933
934 /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */
935 if (server->mnt->flags & SMB_MOUNT_OLDATTR) {
936 server->ops->getattr = smb_proc_getattr_core;
937 } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) {
938 server->ops->getattr = smb_proc_getattr_ff;
939 }
940
941 /* Decode server capabilities */
942 if (server->opt.capabilities & SMB_CAP_LARGE_FILES) {
943 /* Should be ok to set this now, as no one can access the
944 mount until the connection has been established. */
945 SB_of(server)->s_maxbytes = ~0ULL >> 1;
946 VERBOSE("LFS enabled\n");
947 }
948 if (server->opt.capabilities & SMB_CAP_UNICODE) {
949 server->mnt->flags |= SMB_MOUNT_UNICODE;
950 VERBOSE("Unicode enabled\n");
951 } else {
952 server->mnt->flags &= ~SMB_MOUNT_UNICODE;
953 }
954#if 0
955 /* flags we may test for other patches ... */
956 if (server->opt.capabilities & SMB_CAP_LARGE_READX) {
957 VERBOSE("Large reads enabled\n");
958 }
959 if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) {
960 VERBOSE("Large writes enabled\n");
961 }
962#endif
963 if (server->opt.capabilities & SMB_CAP_UNIX) {
964 struct inode *inode;
965 VERBOSE("Using UNIX CIFS extensions\n");
966 install_ops(server->ops, &smb_ops_unix);
967 inode = SB_of(server)->s_root->d_inode;
968 if (inode)
969 inode->i_op = &smb_dir_inode_operations_unix;
970 }
971
972 VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n",
a71113da
EB		 973 server->opt.protocol, server->opt.max_xmit,
974 pid_nr(server->conn_pid), server->opt.capabilities);
1da177e4
LT		 975
976 /* FIXME: this really should be done by smbmount. */
977 if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) {
978 server->opt.max_xmit = SMB_MAX_PACKET_SIZE;
979 }
980
981 smb_unlock_server(server);
982 smbiod_wake_up();
983 if (server->opt.capabilities & SMB_CAP_UNIX)
984 smb_proc_query_cifsunix(server);
985
986 server->conn_complete++;
987 wake_up_interruptible_all(&server->conn_wq);
988 return error;
989
990out:
991 smb_unlock_server(server);
992 smbiod_wake_up();
993 return error;
994
995out_putf:
996 fput(filp);
997 goto out;
998}
999
1000/* smb_setup_header: We completely set up the packet. You only have to
1001 insert the command-specific fields */
1002
1003__u8 *
1004smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc)
1005{
1006 __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2;
1007 __u8 *p = req->rq_header;
1008 struct smb_sb_info *server = req->rq_server;
1009
1010 p = smb_encode_smb_length(p, xmit_len - 4);
1011
1012 *p++ = 0xff;
1013 *p++ = 'S';
1014 *p++ = 'M';
1015 *p++ = 'B';
1016 *p++ = command;
1017
1018 memset(p, '\0', 19);
1019 p += 19;
1020 p += 8;
1021
1022 if (server->opt.protocol > SMB_PROTOCOL_CORE) {
1023 int flags = SMB_FLAGS_CASELESS_PATHNAMES;
1024 int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS |
1025 SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */
1026
1027 *(req->rq_header + smb_flg) = flags;
1028 if (server->mnt->flags & SMB_MOUNT_UNICODE)
1029 flags2 |= SMB_FLAGS2_UNICODE_STRINGS;
1030 WSET(req->rq_header, smb_flg2, flags2);
1031 }
1032 *p++ = wct; /* wct */
1033 p += 2 * wct;
1034 WSET(p, 0, bcc);
1035
1036 /* Include the header in the data to send */
1037 req->rq_iovlen = 1;
1038 req->rq_iov[0].iov_base = req->rq_header;
1039 req->rq_iov[0].iov_len = xmit_len - bcc;
1040
1041 return req->rq_buffer;
1042}
1043
1044static void
1045smb_setup_bcc(struct smb_request *req, __u8 *p)
1046{
1047 u16 bcc = p - req->rq_buffer;
1048 u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header);
1049
1050 WSET(pbcc, 0, bcc);
1051
1052 smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN +
1053 2*SMB_WCT(req->rq_header) - 2 + bcc);
1054
1055 /* Include the "bytes" in the data to send */
1056 req->rq_iovlen = 2;
1057 req->rq_iov[1].iov_base = req->rq_buffer;
1058 req->rq_iov[1].iov_len = bcc;
1059}
1060
1061static int
1062smb_proc_seek(struct smb_sb_info *server, __u16 fileid,
1063 __u16 mode, off_t offset)
1064{
1065 int result;
1066 struct smb_request *req;
1067
1068 result = -ENOMEM;
1069 if (! (req = smb_alloc_request(server, 0)))
1070 goto out;
1071
1072 smb_setup_header(req, SMBlseek, 4, 0);
1073 WSET(req->rq_header, smb_vwv0, fileid);
1074 WSET(req->rq_header, smb_vwv1, mode);
1075 DSET(req->rq_header, smb_vwv2, offset);
1076 req->rq_flags |= SMB_REQ_NORETRY;
1077
1078 result = smb_request_ok(req, SMBlseek, 2, 0);
1079 if (result < 0) {
1080 result = 0;
1081 goto out_free;
1082 }
1083
1084 result = DVAL(req->rq_header, smb_vwv0);
1085out_free:
1086 smb_rput(req);
1087out:
1088 return result;
1089}
1090
1091static int
1092smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish)
1093{
1094 struct inode *ino = dentry->d_inode;
1095 struct smb_inode_info *ei = SMB_I(ino);
1096 int mode, read_write = 0x42, read_only = 0x40;
1097 int res;
1098 char *p;
1099 struct smb_request *req;
1100
1101 /*
1102 * Attempt to open r/w, unless there are no write privileges.
1103 */
1104 mode = read_write;
1105 if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
1106 mode = read_only;
1107#if 0
1108 /* FIXME: why is this code not in? below we fix it so that a caller
1109 wanting RO doesn't get RW. smb_revalidate_inode does some
1110 optimization based on access mode. tail -f needs it to be correct.
1111
1112 We must open rw since we don't do the open if called a second time
1113 with different 'wish'. Is that not supported by smb servers? */
1114 if (!(wish & (O_WRONLY | O_RDWR)))
1115 mode = read_only;
1116#endif
1117
1118 res = -ENOMEM;
1119 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1120 goto out;
1121
1122 retry:
1123 p = smb_setup_header(req, SMBopen, 2, 0);
1124 WSET(req->rq_header, smb_vwv0, mode);
1125 WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR);
1126 res = smb_simple_encode_path(req, &p, dentry, NULL);
1127 if (res < 0)
1128 goto out_free;
1129 smb_setup_bcc(req, p);
1130
1131 res = smb_request_ok(req, SMBopen, 7, 0);
1132 if (res != 0) {
1133 if (mode == read_write &&
1134 (res == -EACCES || res == -ETXTBSY || res == -EROFS))
1135 {
1136 VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n",
1137 DENTRY_PATH(dentry), res);
1138 mode = read_only;
1139 req->rq_flags = 0;
1140 goto retry;
1141 }
1142 goto out_free;
1143 }
1144 /* We should now have data in vwv[0..6]. */
1145
1146 ei->fileid = WVAL(req->rq_header, smb_vwv0);
1147 ei->attr = WVAL(req->rq_header, smb_vwv1);
1148 /* smb_vwv2 has mtime */
1149 /* smb_vwv4 has size */
1150 ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK);
1151 ei->open = server->generation;
1152
1153out_free:
1154 smb_rput(req);
1155out:
1156 return res;
1157}
1158
1159/*
1160 * Make sure the file is open, and check that the access
1161 * is compatible with the desired access.
1162 */
1163int
1164smb_open(struct dentry *dentry, int wish)
1165{
1166 struct inode *inode = dentry->d_inode;
1167 int result;
1168 __u16 access;
1169
1170 result = -ENOENT;
1171 if (!inode) {
1172 printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n",
1173 DENTRY_PATH(dentry));
1174 goto out;
1175 }
1176
1177 if (!smb_is_open(inode)) {
1178 struct smb_sb_info *server = server_from_inode(inode);
1179 result = 0;
1180 if (!smb_is_open(inode))
1181 result = smb_proc_open(server, dentry, wish);
1182 if (result)
1183 goto out;
1184 /*
1185 * A successful open means the path is still valid ...
1186 */
1187 smb_renew_times(dentry);
1188 }
1189
1190 /*
1191 * Check whether the access is compatible with the desired mode.
1192 */
1193 result = 0;
1194 access = SMB_I(inode)->access;
1195 if (access != wish && access != SMB_O_RDWR) {
1196 PARANOIA("%s/%s access denied, access=%x, wish=%x\n",
1197 DENTRY_PATH(dentry), access, wish);
1198 result = -EACCES;
1199 }
1200out:
1201 return result;
1202}
1203
1204static int
1205smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime)
1206{
1207 struct smb_request *req;
1208 int result = -ENOMEM;
1209
1210 if (! (req = smb_alloc_request(server, 0)))
1211 goto out;
1212
1213 smb_setup_header(req, SMBclose, 3, 0);
1214 WSET(req->rq_header, smb_vwv0, fileid);
1215 DSET(req->rq_header, smb_vwv1, utc2local(server, mtime));
1216 req->rq_flags |= SMB_REQ_NORETRY;
1217 result = smb_request_ok(req, SMBclose, 0, 0);
1218
1219 smb_rput(req);
1220out:
1221 return result;
1222}
1223
1224/*
1225 * Win NT 4.0 has an apparent bug in that it fails to update the
1226 * modify time when writing to a file. As a workaround, we update
1227 * both modify and access time locally, and post the times to the
1228 * server when closing the file.
1229 */
1230static int
1231smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino)
1232{
1233 struct smb_inode_info *ei = SMB_I(ino);
1234 int result = 0;
1235 if (smb_is_open(ino))
1236 {
1237 /*
1238 * We clear the open flag in advance, in case another
1239 * process observes the value while we block below.
1240 */
1241 ei->open = 0;
1242
1243 /*
1244 * Kludge alert: SMB timestamps are accurate only to
1245 * two seconds ... round the times to avoid needless
1246 * cache invalidations!
1247 */
1248 if (ino->i_mtime.tv_sec & 1) {
1249 ino->i_mtime.tv_sec--;
1250 ino->i_mtime.tv_nsec = 0;
1251 }
1252 if (ino->i_atime.tv_sec & 1) {
1253 ino->i_atime.tv_sec--;
1254 ino->i_atime.tv_nsec = 0;
1255 }
1256 /*
1257 * If the file is open with write permissions,
1258 * update the time stamps to sync mtime and atime.
1259 */
1260 if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 &&
1261 (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) &&
1262 !(ei->access == SMB_O_RDONLY))
1263 {
1264 struct smb_fattr fattr;
1265 smb_get_inode_attr(ino, &fattr);
1266 smb_proc_setattr_ext(server, ino, &fattr);
1267 }
1268
1269 result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec);
1270 /*
1271 * Force a revalidation after closing ... some servers
1272 * don't post the size until the file has been closed.
1273 */
1274 if (server->opt.protocol < SMB_PROTOCOL_NT1)
1275 ei->oldmtime = 0;
1276 ei->closed = jiffies;
1277 }
1278 return result;
1279}
1280
1281int
1282smb_close(struct inode *ino)
1283{
1284 int result = 0;
1285
1286 if (smb_is_open(ino)) {
1287 struct smb_sb_info *server = server_from_inode(ino);
1288 result = smb_proc_close_inode(server, ino);
1289 }
1290 return result;
1291}
1292
1293/*
1294 * This is used to close a file following a failed instantiate.
1295 * Since we don't have an inode, we can't use any of the above.
1296 */
1297int
1298smb_close_fileid(struct dentry *dentry, __u16 fileid)
1299{
1300 struct smb_sb_info *server = server_from_dentry(dentry);
1301 int result;
1302
1303 result = smb_proc_close(server, fileid, get_seconds());
1304 return result;
1305}
1306
1307/* In smb_proc_read and smb_proc_write we do not retry, because the
1308 file-id would not be valid after a reconnection. */
1309
1310static void
1311smb_proc_read_data(struct smb_request *req)
1312{
1313 req->rq_iov[0].iov_base = req->rq_buffer;
1314 req->rq_iov[0].iov_len = 3;
1315
1316 req->rq_iov[1].iov_base = req->rq_page;
1317 req->rq_iov[1].iov_len = req->rq_rsize;
1318 req->rq_iovlen = 2;
1319
1320 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1321}
1322
1323static int
1324smb_proc_read(struct inode *inode, loff_t offset, int count, char *data)
1325{
1326 struct smb_sb_info *server = server_from_inode(inode);
1327 __u16 returned_count, data_len;
1328 unsigned char *buf;
1329 int result;
1330 struct smb_request *req;
1331 u8 rbuf[4];
1332
1333 result = -ENOMEM;
1334 if (! (req = smb_alloc_request(server, 0)))
1335 goto out;
1336
1337 smb_setup_header(req, SMBread, 5, 0);
1338 buf = req->rq_header;
1339 WSET(buf, smb_vwv0, SMB_I(inode)->fileid);
1340 WSET(buf, smb_vwv1, count);
1341 DSET(buf, smb_vwv2, offset);
1342 WSET(buf, smb_vwv4, 0);
1343
1344 req->rq_page = data;
1345 req->rq_rsize = count;
1346 req->rq_callback = smb_proc_read_data;
1347 req->rq_buffer = rbuf;
1348 req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC;
1349
1350 result = smb_request_ok(req, SMBread, 5, -1);
1351 if (result < 0)
1352 goto out_free;
1353 returned_count = WVAL(req->rq_header, smb_vwv0);
1354
1355 data_len = WVAL(rbuf, 1);
1356
1357 if (returned_count != data_len) {
1358 printk(KERN_NOTICE "smb_proc_read: returned != data_len\n");
1359 printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n",
1360 returned_count, data_len);
1361 }
1362 result = data_len;
1363
1364out_free:
1365 smb_rput(req);
1366out:
1367 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1368 inode->i_ino, SMB_I(inode)->fileid, count, result);
1369 return result;
1370}
1371
1372static int
1373smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data)
1374{
1375 struct smb_sb_info *server = server_from_inode(inode);
1376 int result;
1377 u16 fileid = SMB_I(inode)->fileid;
1378 u8 buf[4];
1379 struct smb_request *req;
1380
1381 result = -ENOMEM;
1382 if (! (req = smb_alloc_request(server, 0)))
1383 goto out;
1384
1385 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1386 inode->i_ino, fileid, count, offset);
1387
1388 smb_setup_header(req, SMBwrite, 5, count + 3);
1389 WSET(req->rq_header, smb_vwv0, fileid);
1390 WSET(req->rq_header, smb_vwv1, count);
1391 DSET(req->rq_header, smb_vwv2, offset);
1392 WSET(req->rq_header, smb_vwv4, 0);
1393
1394 buf[0] = 1;
1395 WSET(buf, 1, count); /* yes, again ... */
1396 req->rq_iov[1].iov_base = buf;
1397 req->rq_iov[1].iov_len = 3;
1398 req->rq_iov[2].iov_base = (char *) data;
1399 req->rq_iov[2].iov_len = count;
1400 req->rq_iovlen = 3;
1401 req->rq_flags |= SMB_REQ_NORETRY;
1402
1403 result = smb_request_ok(req, SMBwrite, 1, 0);
1404 if (result >= 0)
1405 result = WVAL(req->rq_header, smb_vwv0);
1406
1407 smb_rput(req);
1408out:
1409 return result;
1410}
1411
1412/*
1413 * In smb_proc_readX and smb_proc_writeX we do not retry, because the
1414 * file-id would not be valid after a reconnection.
1415 */
1416
1417#define SMB_READX_MAX_PAD 64
1418static void
1419smb_proc_readX_data(struct smb_request *req)
1420{
1421 /* header length, excluding the netbios length (-4) */
1422 int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2;
1423 int data_off = WVAL(req->rq_header, smb_vwv6);
1424
1425 /*
1426 * Some genius made the padding to the data bytes arbitrary.
1427 * So we must first calculate the amount of padding used by the server.
1428 */
1429 data_off -= hdrlen;
1430 if (data_off > SMB_READX_MAX_PAD || data_off < 0) {
1431 PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n");
1432 PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off);
1433 req->rq_rlen = req->rq_bufsize + 1;
1434 return;
1435 }
1436 req->rq_iov[0].iov_base = req->rq_buffer;
1437 req->rq_iov[0].iov_len = data_off;
1438
1439 req->rq_iov[1].iov_base = req->rq_page;
1440 req->rq_iov[1].iov_len = req->rq_rsize;
1441 req->rq_iovlen = 2;
1442
1443 req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd;
1444}
1445
1446static int
1447smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data)
1448{
1449 struct smb_sb_info *server = server_from_inode(inode);
1450 unsigned char *buf;
1451 int result;
1452 struct smb_request *req;
1453 static char pad[SMB_READX_MAX_PAD];
1454
1455 result = -ENOMEM;
1456 if (! (req = smb_alloc_request(server, 0)))
1457 goto out;
1458
1459 smb_setup_header(req, SMBreadX, 12, 0);
1460 buf = req->rq_header;
1461 WSET(buf, smb_vwv0, 0x00ff);
1462 WSET(buf, smb_vwv1, 0);
1463 WSET(buf, smb_vwv2, SMB_I(inode)->fileid);
1464 DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */
1465 WSET(buf, smb_vwv5, count);
1466 WSET(buf, smb_vwv6, 0);
1467 DSET(buf, smb_vwv7, 0);
1468 WSET(buf, smb_vwv9, 0);
1469 DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */
1470 WSET(buf, smb_vwv11, 0);
1471
1472 req->rq_page = data;
1473 req->rq_rsize = count;
1474 req->rq_callback = smb_proc_readX_data;
1475 req->rq_buffer = pad;
1476 req->rq_bufsize = SMB_READX_MAX_PAD;
1477 req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY;
1478
1479 result = smb_request_ok(req, SMBreadX, 12, -1);
1480 if (result < 0)
1481 goto out_free;
1482 result = WVAL(req->rq_header, smb_vwv5);
1483
1484out_free:
1485 smb_rput(req);
1486out:
1487 VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n",
1488 inode->i_ino, SMB_I(inode)->fileid, count, result);
1489 return result;
1490}
1491
1492static int
1493smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data)
1494{
1495 struct smb_sb_info *server = server_from_inode(inode);
1496 int result;
1497 u8 *p;
1498 static u8 pad[4];
1499 struct smb_request *req;
1500
1501 result = -ENOMEM;
1502 if (! (req = smb_alloc_request(server, 0)))
1503 goto out;
1504
1505 VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n",
1506 inode->i_ino, SMB_I(inode)->fileid, count, offset);
1507
1508 p = smb_setup_header(req, SMBwriteX, 14, count + 1);
1509 WSET(req->rq_header, smb_vwv0, 0x00ff);
1510 WSET(req->rq_header, smb_vwv1, 0);
1511 WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid);
1512 DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */
1513 DSET(req->rq_header, smb_vwv5, 0);
1514 WSET(req->rq_header, smb_vwv7, 0); /* write mode */
1515 WSET(req->rq_header, smb_vwv8, 0);
1516 WSET(req->rq_header, smb_vwv9, 0);
1517 WSET(req->rq_header, smb_vwv10, count); /* data length */
1518 WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1);
1519 DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32));
1520
1521 req->rq_iov[1].iov_base = pad;
1522 req->rq_iov[1].iov_len = 1;
1523 req->rq_iov[2].iov_base = (char *) data;
1524 req->rq_iov[2].iov_len = count;
1525 req->rq_iovlen = 3;
1526 req->rq_flags |= SMB_REQ_NORETRY;
1527
1528 result = smb_request_ok(req, SMBwriteX, 6, 0);
1529 if (result >= 0)
1530 result = WVAL(req->rq_header, smb_vwv2);
1531
1532 smb_rput(req);
1533out:
1534 return result;
1535}
1536
1537int
1538smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid)
1539{
1540 struct smb_sb_info *server = server_from_dentry(dentry);
1541 char *p;
1542 int result;
1543 struct smb_request *req;
1544
1545 result = -ENOMEM;
1546 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1547 goto out;
1548
1549 p = smb_setup_header(req, SMBcreate, 3, 0);
1550 WSET(req->rq_header, smb_vwv0, attr);
1551 DSET(req->rq_header, smb_vwv1, utc2local(server, ctime));
1552 result = smb_simple_encode_path(req, &p, dentry, NULL);
1553 if (result < 0)
1554 goto out_free;
1555 smb_setup_bcc(req, p);
1556
1557 result = smb_request_ok(req, SMBcreate, 1, 0);
1558 if (result < 0)
1559 goto out_free;
1560
1561 *fileid = WVAL(req->rq_header, smb_vwv0);
1562 result = 0;
1563
1564out_free:
1565 smb_rput(req);
1566out:
1567 return result;
1568}
1569
1570int
1571smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry)
1572{
1573 struct smb_sb_info *server = server_from_dentry(old_dentry);
1574 char *p;
1575 int result;
1576 struct smb_request *req;
1577
1578 result = -ENOMEM;
1579 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1580 goto out;
1581
1582 p = smb_setup_header(req, SMBmv, 1, 0);
1583 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR);
1584 result = smb_simple_encode_path(req, &p, old_dentry, NULL);
1585 if (result < 0)
1586 goto out_free;
1587 result = smb_simple_encode_path(req, &p, new_dentry, NULL);
1588 if (result < 0)
1589 goto out_free;
1590 smb_setup_bcc(req, p);
1591
1592 if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0)
1593 goto out_free;
1594 result = 0;
1595
1596out_free:
1597 smb_rput(req);
1598out:
1599 return result;
1600}
1601
1602/*
1603 * Code common to mkdir and rmdir.
1604 */
1605static int
1606smb_proc_generic_command(struct dentry *dentry, __u8 command)
1607{
1608 struct smb_sb_info *server = server_from_dentry(dentry);
1609 char *p;
1610 int result;
1611 struct smb_request *req;
1612
1613 result = -ENOMEM;
1614 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1615 goto out;
1616
1617 p = smb_setup_header(req, command, 0, 0);
1618 result = smb_simple_encode_path(req, &p, dentry, NULL);
1619 if (result < 0)
1620 goto out_free;
1621 smb_setup_bcc(req, p);
1622
1623 result = smb_request_ok(req, command, 0, 0);
1624 if (result < 0)
1625 goto out_free;
1626 result = 0;
1627
1628out_free:
1629 smb_rput(req);
1630out:
1631 return result;
1632}
1633
1634int
1635smb_proc_mkdir(struct dentry *dentry)
1636{
1637 return smb_proc_generic_command(dentry, SMBmkdir);
1638}
1639
1640int
1641smb_proc_rmdir(struct dentry *dentry)
1642{
1643 return smb_proc_generic_command(dentry, SMBrmdir);
1644}
1645
1646#if SMBFS_POSIX_UNLINK
1647/*
1648 * Removes readonly attribute from a file. Used by unlink to give posix
1649 * semantics.
1650 */
1651static int
1652smb_set_rw(struct dentry *dentry,struct smb_sb_info *server)
1653{
1654 int result;
1655 struct smb_fattr fattr;
1656
1657 /* FIXME: cifsUE should allow removing a readonly file. */
1658
1659 /* first get current attribute */
1660 smb_init_dirent(server, &fattr);
1661 result = server->ops->getattr(server, dentry, &fattr);
1662 smb_finish_dirent(server, &fattr);
1663 if (result < 0)
1664 return result;
1665
1666 /* if RONLY attribute is set, remove it */
1667 if (fattr.attr & aRONLY) { /* read only attribute is set */
1668 fattr.attr &= ~aRONLY;
1669 result = smb_proc_setattr_core(server, dentry, fattr.attr);
1670 }
1671 return result;
1672}
1673#endif
1674
1675int
1676smb_proc_unlink(struct dentry *dentry)
1677{
1678 struct smb_sb_info *server = server_from_dentry(dentry);
1679 int flag = 0;
1680 char *p;
1681 int result;
1682 struct smb_request *req;
1683
1684 result = -ENOMEM;
1685 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
1686 goto out;
1687
1688 retry:
1689 p = smb_setup_header(req, SMBunlink, 1, 0);
1690 WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN);
1691 result = smb_simple_encode_path(req, &p, dentry, NULL);
1692 if (result < 0)
1693 goto out_free;
1694 smb_setup_bcc(req, p);
1695
1696 if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) {
1697#if SMBFS_POSIX_UNLINK
1698 if (result == -EACCES && !flag) {
1699 /* Posix semantics is for the read-only state
1700 of a file to be ignored in unlink(). In the
1701 SMB world a unlink() is refused on a
1702 read-only file. To make things easier for
1703 unix users we try to override the files
1704 permission if the unlink fails with the
1705 right error.
1706 This introduces a race condition that could
1707 lead to a file being written by someone who
1708 shouldn't have access, but as far as I can
1709 tell that is unavoidable */
1710
1711 /* remove RONLY attribute and try again */
1712 result = smb_set_rw(dentry,server);
1713 if (result == 0) {
1714 flag = 1;
1715 req->rq_flags = 0;
1716 goto retry;
1717 }
1718 }
1719#endif
1720 goto out_free;
1721 }
1722 result = 0;
1723
1724out_free:
1725 smb_rput(req);
1726out:
1727 return result;
1728}
1729
1730int
1731smb_proc_flush(struct smb_sb_info *server, __u16 fileid)
1732{
1733 int result;
1734 struct smb_request *req;
1735
1736 result = -ENOMEM;
1737 if (! (req = smb_alloc_request(server, 0)))
1738 goto out;
1739
1740 smb_setup_header(req, SMBflush, 1, 0);
1741 WSET(req->rq_header, smb_vwv0, fileid);
1742 req->rq_flags |= SMB_REQ_NORETRY;
1743 result = smb_request_ok(req, SMBflush, 0, 0);
1744
1745 smb_rput(req);
1746out:
1747 return result;
1748}
1749
1750static int
1751smb_proc_trunc32(struct inode *inode, loff_t length)
1752{
1753 /*
1754 * Writing 0bytes is old-SMB magic for truncating files.
1755 * MAX_NON_LFS should prevent this from being called with a too
1756 * large offset.
1757 */
1758 return smb_proc_write(inode, length, 0, NULL);
1759}
1760
1761static int
1762smb_proc_trunc64(struct inode *inode, loff_t length)
1763{
1764 struct smb_sb_info *server = server_from_inode(inode);
1765 int result;
1766 char *param;
1767 char *data;
1768 struct smb_request *req;
1769
1770 result = -ENOMEM;
1771 if (! (req = smb_alloc_request(server, 14)))
1772 goto out;
1773
1774 param = req->rq_buffer;
1775 data = req->rq_buffer + 6;
1776
1777 /* FIXME: must we also set allocation size? winNT seems to do that */
1778 WSET(param, 0, SMB_I(inode)->fileid);
1779 WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO);
1780 WSET(param, 4, 0);
1781 LSET(data, 0, length);
1782
1783 req->rq_trans2_command = TRANSACT2_SETFILEINFO;
1784 req->rq_ldata = 8;
1785 req->rq_data = data;
1786 req->rq_lparm = 6;
1787 req->rq_parm = param;
1788 req->rq_flags |= SMB_REQ_NORETRY;
1789 result = smb_add_request(req);
1790 if (result < 0)
1791 goto out_free;
1792
1793 result = 0;
1794 if (req->rq_rcls != 0)
1795 result = smb_errno(req);
1796
1797out_free:
1798 smb_rput(req);
1799out:
1800 return result;
1801}
1802
1803static int
1804smb_proc_trunc95(struct inode *inode, loff_t length)
1805{
1806 struct smb_sb_info *server = server_from_inode(inode);
1807 int result = smb_proc_trunc32(inode, length);
1808
1809 /*
1810 * win9x doesn't appear to update the size immediately.
1811 * It will return the old file size after the truncate,
1812 * confusing smbfs. So we force an update.
1813 *
1814 * FIXME: is this still necessary?
1815 */
1816 smb_proc_flush(server, SMB_I(inode)->fileid);
1817 return result;
1818}
1819
1820static void
1821smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1822{
1823 memset(fattr, 0, sizeof(*fattr));
1824
1825 fattr->f_nlink = 1;
1826 fattr->f_uid = server->mnt->uid;
1827 fattr->f_gid = server->mnt->gid;
1da177e4
LT		 1828 fattr->f_unix = 0;
1829}
1830
1831static void
1832smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr)
1833{
1834 if (fattr->f_unix)
1835 return;
1836
1837 fattr->f_mode = server->mnt->file_mode;
1838 if (fattr->attr & aDIR) {
1839 fattr->f_mode = server->mnt->dir_mode;
1840 fattr->f_size = SMB_ST_BLKSIZE;
1841 }
1842 /* Check the read-only flag */
1843 if (fattr->attr & aRONLY)
1844 fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
1845
1846 /* How many 512 byte blocks do we need for this file? */
1847 fattr->f_blocks = 0;
1848 if (fattr->f_size != 0)
1849 fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9);
1850 return;
1851}
1852
1853void
1854smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr,
1855 struct super_block *sb)
1856{
1857 smb_init_dirent(server, fattr);
1858 fattr->attr = aDIR;
1859 fattr->f_ino = 2; /* traditional root inode number */
1860 fattr->f_mtime = current_fs_time(sb);
1861 smb_finish_dirent(server, fattr);
1862}
1863
1864/*
1865 * Decode a dirent for old protocols
1866 *
1867 * qname is filled with the decoded, and possibly translated, name.
1868 * fattr receives decoded attributes
1869 *
1870 * Bugs Noted:
1871 * (1) Pathworks servers may pad the name with extra spaces.
1872 */
1873static char *
1874smb_decode_short_dirent(struct smb_sb_info *server, char *p,
1875 struct qstr *qname, struct smb_fattr *fattr,
1876 unsigned char *name_buf)
1877{
1878 int len;
1879
1880 /*
1881 * SMB doesn't have a concept of inode numbers ...
1882 */
1883 smb_init_dirent(server, fattr);
1884 fattr->f_ino = 0; /* FIXME: do we need this? */
1885
1886 p += SMB_STATUS_SIZE; /* reserved (search_status) */
1887 fattr->attr = *p;
1888 fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1));
1889 fattr->f_mtime.tv_nsec = 0;
1890 fattr->f_size = DVAL(p, 5);
1891 fattr->f_ctime = fattr->f_mtime;
1892 fattr->f_atime = fattr->f_mtime;
1893 qname->name = p + 9;
1894 len = strnlen(qname->name, 12);
1895
1896 /*
1897 * Trim trailing blanks for Pathworks servers
1898 */
1899 while (len > 2 && qname->name[len-1] == ' ')
1900 len--;
1901
1902 smb_finish_dirent(server, fattr);
1903
1904#if 0
1905 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
1906 allow the flag to be set anyway. It kills const. Remove? */
1907 switch (server->opt.case_handling) {
1908 case SMB_CASE_UPPER:
1909 str_upper(entry->name, len);
1910 break;
1911 case SMB_CASE_LOWER:
1912 str_lower(entry->name, len);
1913 break;
1914 default:
1915 break;
1916 }
1917#endif
1918
1919 qname->len = 0;
1920 len = server->ops->convert(name_buf, SMB_MAXNAMELEN,
1921 qname->name, len,
1922 server->remote_nls, server->local_nls);
1923 if (len > 0) {
1924 qname->len = len;
1925 qname->name = name_buf;
1926 DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name);
1927 }
1928
1929 return p + 22;
1930}
1931
1932/*
1933 * This routine is used to read in directory entries from the network.
1934 * Note that it is for short directory name seeks, i.e.: protocol <
1935 * SMB_PROTOCOL_LANMAN2
1936 */
1937static int
1938smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir,
1939 struct smb_cache_control *ctl)
1940{
17b75e69 1941 struct dentry *dir = filp->f_path.dentry;
1da177e4
LT		 1942 struct smb_sb_info *server = server_from_dentry(dir);
1943 struct qstr qname;
1944 struct smb_fattr fattr;
1945 char *p;
1946 int result;
1947 int i, first, entries_seen, entries;
1948 int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE;
1949 __u16 bcc;
1950 __u16 count;
1951 char status[SMB_STATUS_SIZE];
1952 static struct qstr mask = {
1953 .name = "*.*",
1954 .len = 3,
1955 };
1956 unsigned char *last_status;
1957 struct smb_request *req;
1958 unsigned char *name_buf;
1959
1960 VERBOSE("%s/%s\n", DENTRY_PATH(dir));
1961
1962 lock_kernel();
1963
1964 result = -ENOMEM;
1965 if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL)))
1966 goto out;
1967
1968 first = 1;
1969 entries = 0;
1970 entries_seen = 2; /* implicit . and .. */
1971
1972 result = -ENOMEM;
1973 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
1974 goto out_name;
1975
1976 while (1) {
1977 p = smb_setup_header(req, SMBsearch, 2, 0);
1978 WSET(req->rq_header, smb_vwv0, entries_asked);
1979 WSET(req->rq_header, smb_vwv1, aDIR);
1980 if (first == 1) {
1981 result = smb_simple_encode_path(req, &p, dir, &mask);
1982 if (result < 0)
1983 goto out_free;
1984 if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) {
1985 result = -ENAMETOOLONG;
1986 goto out_free;
1987 }
1988 *p++ = 5;
1989 WSET(p, 0, 0);
1990 p += 2;
1991 first = 0;
1992 } else {
1993 if (p + 5 + SMB_STATUS_SIZE >
1994 (char *)req->rq_buffer + req->rq_bufsize) {
1995 result = -ENAMETOOLONG;
1996 goto out_free;
1997 }
1998
1999 *p++ = 4;
2000 *p++ = 0;
2001 *p++ = 5;
2002 WSET(p, 0, SMB_STATUS_SIZE);
2003 p += 2;
2004 memcpy(p, status, SMB_STATUS_SIZE);
2005 p += SMB_STATUS_SIZE;
2006 }
2007
2008 smb_setup_bcc(req, p);
2009
2010 result = smb_request_ok(req, SMBsearch, 1, -1);
2011 if (result < 0) {
2012 if ((req->rq_rcls == ERRDOS) &&
2013 (req->rq_err == ERRnofiles))
2014 break;
2015 goto out_free;
2016 }
2017 count = WVAL(req->rq_header, smb_vwv0);
2018 if (count <= 0)
2019 break;
2020
2021 result = -EIO;
2022 bcc = smb_bcc(req->rq_header);
2023 if (bcc != count * SMB_DIRINFO_SIZE + 3)
2024 goto out_free;
2025 p = req->rq_buffer + 3;
2026
2027
2028 /* Make sure the response fits in the buffer. Fixed sized
2029 entries means we don't have to check in the decode loop. */
2030
2031 last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE;
2032
2033 if (last_status + SMB_DIRINFO_SIZE >=
2034 req->rq_buffer + req->rq_bufsize) {
2035 printk(KERN_ERR "smb_proc_readdir_short: "
2036 "last dir entry outside buffer! "
2037 "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status,
2038 req->rq_bufsize, req->rq_buffer);
2039 goto out_free;
2040 }
2041
2042 /* Read the last entry into the status field. */
2043 memcpy(status, last_status, SMB_STATUS_SIZE);
2044
2045
2046 /* Now we are ready to parse smb directory entries. */
2047
2048 for (i = 0; i < count; i++) {
2049 p = smb_decode_short_dirent(server, p,
2050 &qname, &fattr, name_buf);
2051 if (qname.len == 0)
2052 continue;
2053
2054 if (entries_seen == 2 && qname.name[0] == '.') {
2055 if (qname.len == 1)
2056 continue;
2057 if (qname.name[1] == '.' && qname.len == 2)
2058 continue;
2059 }
2060 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2061 &qname, &fattr))
2062 ; /* stop reading? */
2063 entries_seen++;
2064 }
2065 }
2066 result = entries;
2067
2068out_free:
2069 smb_rput(req);
2070out_name:
2071 kfree(name_buf);
2072out:
2073 unlock_kernel();
2074 return result;
2075}
2076
2077static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p)
2078{
2079 u64 size, disk_bytes;
2080
2081 /* FIXME: verify nls support. all is sent as utf8? */
2082
2083 fattr->f_unix = 1;
2084 fattr->f_mode = 0;
2085
2086 /* FIXME: use the uniqueID from the remote instead? */
2087 /* 0 L file size in bytes */
2088 /* 8 L file size on disk in bytes (block count) */
2089 /* 40 L uid */
2090 /* 48 L gid */
2091 /* 56 W file type */
2092 /* 60 L devmajor */
2093 /* 68 L devminor */
2094 /* 76 L unique ID (inode) */
2095 /* 84 L permissions */
2096 /* 92 L link count */
2097
2098 size = LVAL(p, 0);
2099 disk_bytes = LVAL(p, 8);
2100
2101 /*
2102 * Some samba versions round up on-disk byte usage
2103 * to 1MB boundaries, making it useless. When seeing
2104 * that, use the size instead.
2105 */
2106 if (!(disk_bytes & 0xfffff))
2107 disk_bytes = size+511;
2108
2109 fattr->f_size = size;
2110 fattr->f_blocks = disk_bytes >> 9;
2111 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16));
2112 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24));
2113 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32));
2114
2115 if (server->mnt->flags & SMB_MOUNT_UID)
2116 fattr->f_uid = server->mnt->uid;
2117 else
2118 fattr->f_uid = LVAL(p, 40);
2119
2120 if (server->mnt->flags & SMB_MOUNT_GID)
2121 fattr->f_gid = server->mnt->gid;
2122 else
2123 fattr->f_gid = LVAL(p, 48);
2124
2125 fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56));
2126
2127 if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) {
2128 __u64 major = LVAL(p, 60);
2129 __u64 minor = LVAL(p, 68);
2130
2131 fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff);
2132 if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) ||
2133 MINOR(fattr->f_rdev) != (minor & 0xffffffff))
2134 fattr->f_rdev = 0;
2135 }
2136
2137 fattr->f_mode |= LVAL(p, 84);
2138
2139 if ( (server->mnt->flags & SMB_MOUNT_DMODE) &&
2140 (S_ISDIR(fattr->f_mode)) )
2141 fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR;
2142 else if ( (server->mnt->flags & SMB_MOUNT_FMODE) &&
2143 !(S_ISDIR(fattr->f_mode)) )
2144 fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) |
2145 (fattr->f_mode & S_IFMT);
2146
2147}
2148
2149/*
2150 * Interpret a long filename structure using the specified info level:
2151 * level 1 for anything below NT1 protocol
2152 * level 260 for NT1 protocol
2153 *
2154 * qname is filled with the decoded, and possibly translated, name
2155 * fattr receives decoded attributes.
2156 *
2157 * Bugs Noted:
2158 * (1) Win NT 4.0 appends a null byte to names and counts it in the length!
2159 */
2160static char *
2161smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level,
2162 struct qstr *qname, struct smb_fattr *fattr,
2163 unsigned char *name_buf)
2164{
2165 char *result;
2166 unsigned int len = 0;
2167 int n;
2168 __u16 date, time;
2169 int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
2170
2171 /*
2172 * SMB doesn't have a concept of inode numbers ...
2173 */
2174 smb_init_dirent(server, fattr);
2175 fattr->f_ino = 0; /* FIXME: do we need this? */
2176
2177 switch (level) {
2178 case 1:
2179 len = *((unsigned char *) p + 22);
2180 qname->name = p + 23;
2181 result = p + 24 + len;
2182
2183 date = WVAL(p, 0);
2184 time = WVAL(p, 2);
2185 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2186 fattr->f_ctime.tv_nsec = 0;
2187
2188 date = WVAL(p, 4);
2189 time = WVAL(p, 6);
2190 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2191 fattr->f_atime.tv_nsec = 0;
2192
2193 date = WVAL(p, 8);
2194 time = WVAL(p, 10);
2195 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2196 fattr->f_mtime.tv_nsec = 0;
2197 fattr->f_size = DVAL(p, 12);
2198 /* ULONG allocation size */
2199 fattr->attr = WVAL(p, 20);
2200
2201 VERBOSE("info 1 at %p, len=%d, name=%.*s\n",
2202 p, len, len, qname->name);
2203 break;
2204 case 260:
2205 result = p + WVAL(p, 0);
2206 len = DVAL(p, 60);
2207 if (len > 255) len = 255;
2208 /* NT4 null terminates, unless we are using unicode ... */
2209 qname->name = p + 94;
2210 if (!unicode && len && qname->name[len-1] == '\0')
2211 len--;
2212
2213 fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8));
2214 fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16));
2215 fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24));
2216 /* change time (32) */
2217 fattr->f_size = LVAL(p, 40);
2218 /* alloc size (48) */
2219 fattr->attr = DVAL(p, 56);
2220
2221 VERBOSE("info 260 at %p, len=%d, name=%.*s\n",
2222 p, len, len, qname->name);
2223 break;
2224 case SMB_FIND_FILE_UNIX:
2225 result = p + WVAL(p, 0);
2226 qname->name = p + 108;
2227
2228 len = strlen(qname->name);
2229 /* FIXME: should we check the length?? */
2230
2231 p += 8;
2232 smb_decode_unix_basic(fattr, server, p);
2233 VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n",
2234 p, len, len, qname->name);
2235 break;
2236 default:
2237 PARANOIA("Unknown info level %d\n", level);
2238 result = p + WVAL(p, 0);
2239 goto out;
2240 }
2241
2242 smb_finish_dirent(server, fattr);
2243
2244#if 0
2245 /* FIXME: These only work for ascii chars, and recent smbmount doesn't
2246 allow the flag to be set anyway. Remove? */
2247 switch (server->opt.case_handling) {
2248 case SMB_CASE_UPPER:
2249 str_upper(qname->name, len);
2250 break;
2251 case SMB_CASE_LOWER:
2252 str_lower(qname->name, len);
2253 break;
2254 default:
2255 break;
2256 }
2257#endif
2258
2259 qname->len = 0;
2260 n = server->ops->convert(name_buf, SMB_MAXNAMELEN,
2261 qname->name, len,
2262 server->remote_nls, server->local_nls);
2263 if (n > 0) {
2264 qname->len = n;
2265 qname->name = name_buf;
2266 }
2267
2268out:
2269 return result;
2270}
2271
2272/* findfirst/findnext flags */
2273#define SMB_CLOSE_AFTER_FIRST (1<<0)
2274#define SMB_CLOSE_IF_END (1<<1)
2275#define SMB_REQUIRE_RESUME_KEY (1<<2)
2276#define SMB_CONTINUE_BIT (1<<3)
2277
2278/*
2279 * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in
2280 * source/libsmb/clilist.c. When looking for smb bugs in the readdir code,
2281 * go there for advise.
2282 *
2283 * Bugs Noted:
2284 * (1) When using Info Level 1 Win NT 4.0 truncates directory listings
2285 * for certain patterns of names and/or lengths. The breakage pattern
2286 * is completely reproducible and can be toggled by the creation of a
2287 * single file. (E.g. echo hi >foo breaks, rm -f foo works.)
2288 */
2289static int
2290smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir,
2291 struct smb_cache_control *ctl)
2292{
17b75e69 2293 struct dentry *dir = filp->f_path.dentry;
1da177e4
LT		 2294 struct smb_sb_info *server = server_from_dentry(dir);
2295 struct qstr qname;
2296 struct smb_fattr fattr;
2297
2298 unsigned char *p, *lastname;
2299 char *mask, *param;
2300 __u16 command;
2301 int first, entries_seen;
2302
2303 /* Both NT and OS/2 accept info level 1 (but see note below). */
2304 int info_level = 260;
2305 const int max_matches = 512;
2306
2307 unsigned int ff_searchcount = 0;
2308 unsigned int ff_eos = 0;
2309 unsigned int ff_lastname = 0;
2310 unsigned int ff_dir_handle = 0;
2311 unsigned int loop_count = 0;
2312 unsigned int mask_len, i;
2313 int result;
2314 struct smb_request *req;
2315 unsigned char *name_buf;
2316 static struct qstr star = {
2317 .name = "*",
2318 .len = 1,
2319 };
2320
2321 lock_kernel();
2322
2323 /*
2324 * We always prefer unix style. Use info level 1 for older
2325 * servers that don't do 260.
2326 */
2327 if (server->opt.capabilities & SMB_CAP_UNIX)
2328 info_level = SMB_FIND_FILE_UNIX;
2329 else if (server->opt.protocol < SMB_PROTOCOL_NT1)
2330 info_level = 1;
2331
2332 result = -ENOMEM;
2333 if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL)))
2334 goto out;
2335 if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
2336 goto out_name;
2337 param = req->rq_buffer;
2338
2339 /*
2340 * Encode the initial path
2341 */
2342 mask = param + 12;
2343
2344 result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star);
2345 if (result <= 0)
2346 goto out_free;
2347 mask_len = result - 1; /* mask_len is strlen, not #bytes */
2348 result = 0;
2349 first = 1;
2350 VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask);
2351
2352 entries_seen = 2;
2353 ff_eos = 0;
2354
2355 while (ff_eos == 0) {
2356 loop_count += 1;
2357 if (loop_count > 10) {
2358 printk(KERN_WARNING "smb_proc_readdir_long: "
2359 "Looping in FIND_NEXT??\n");
2360 result = -EIO;
2361 break;
2362 }
2363
2364 if (first != 0) {
2365 command = TRANSACT2_FINDFIRST;
2366 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2367 WSET(param, 2, max_matches); /* max count */
2368 WSET(param, 4, SMB_CLOSE_IF_END);
2369 WSET(param, 6, info_level);
2370 DSET(param, 8, 0);
2371 } else {
2372 command = TRANSACT2_FINDNEXT;
2373
2374 VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n",
2375 ff_dir_handle, ff_lastname, mask_len, mask);
2376
2377 WSET(param, 0, ff_dir_handle); /* search handle */
2378 WSET(param, 2, max_matches); /* max count */
2379 WSET(param, 4, info_level);
2380 DSET(param, 6, 0);
2381 WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END);
2382 }
2383
2384 req->rq_trans2_command = command;
2385 req->rq_ldata = 0;
2386 req->rq_data = NULL;
2387 req->rq_lparm = 12 + mask_len + 1;
2388 req->rq_parm = param;
2389 req->rq_flags = 0;
2390 result = smb_add_request(req);
2391 if (result < 0) {
2392 PARANOIA("error=%d, breaking\n", result);
2393 break;
2394 }
2395
2396 if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
2397 /* a damn Win95 bug - sometimes it clags if you
2398 ask it too fast */
041e0e3b 2399 schedule_timeout_interruptible(msecs_to_jiffies(200));
1da177e4
LT		 2400 continue;
2401 }
2402
2403 if (req->rq_rcls != 0) {
2404 result = smb_errno(req);
2405 PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n",
2406 mask, result, req->rq_rcls, req->rq_err);
2407 break;
2408 }
2409
2410 /* parse out some important return info */
2411 if (first != 0) {
2412 ff_dir_handle = WVAL(req->rq_parm, 0);
2413 ff_searchcount = WVAL(req->rq_parm, 2);
2414 ff_eos = WVAL(req->rq_parm, 4);
2415 ff_lastname = WVAL(req->rq_parm, 8);
2416 } else {
2417 ff_searchcount = WVAL(req->rq_parm, 0);
2418 ff_eos = WVAL(req->rq_parm, 2);
2419 ff_lastname = WVAL(req->rq_parm, 6);
2420 }
2421
2422 if (ff_searchcount == 0)
2423 break;
2424
2425 /* Now we are ready to parse smb directory entries. */
2426
2427 /* point to the data bytes */
2428 p = req->rq_data;
2429 for (i = 0; i < ff_searchcount; i++) {
2430 /* make sure we stay within the buffer */
2431 if (p >= req->rq_data + req->rq_ldata) {
2432 printk(KERN_ERR "smb_proc_readdir_long: "
2433 "dirent pointer outside buffer! "
2434 "%p %d@%p\n",
2435 p, req->rq_ldata, req->rq_data);
2436 result = -EIO; /* always a comm. error? */
2437 goto out_free;
2438 }
2439
2440 p = smb_decode_long_dirent(server, p, info_level,
2441 &qname, &fattr, name_buf);
2442
2443 /* ignore . and .. from the server */
2444 if (entries_seen == 2 && qname.name[0] == '.') {
2445 if (qname.len == 1)
2446 continue;
2447 if (qname.name[1] == '.' && qname.len == 2)
2448 continue;
2449 }
2450
2451 if (!smb_fill_cache(filp, dirent, filldir, ctl,
2452 &qname, &fattr))
2453 ; /* stop reading? */
2454 entries_seen++;
2455 }
2456
2457 VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos);
2458
2459 /*
2460 * We might need the lastname for continuations.
2461 *
2462 * Note that some servers (win95?) point to the filename and
2463 * others (NT4, Samba using NT1) to the dir entry. We assume
2464 * here that those who do not point to a filename do not need
2465 * this info to continue the listing.
2466 *
2467 * OS/2 needs this and talks infolevel 1.
2468 * NetApps want lastname with infolevel 260.
2469 * win2k want lastname with infolevel 260, and points to
2470 * the record not to the name.
2471 * Samba+CifsUnixExt doesn't need lastname.
2472 *
2473 * Both are happy if we return the data they point to. So we do.
2474 * (FIXME: above is not true with win2k)
2475 */
2476 mask_len = 0;
2477 if (info_level != SMB_FIND_FILE_UNIX &&
2478 ff_lastname > 0 && ff_lastname < req->rq_ldata) {
2479 lastname = req->rq_data + ff_lastname;
2480
2481 switch (info_level) {
2482 case 260:
2483 mask_len = req->rq_ldata - ff_lastname;
2484 break;
2485 case 1:
2486 /* lastname points to a length byte */
2487 mask_len = *lastname++;
2488 if (ff_lastname + 1 + mask_len > req->rq_ldata)
2489 mask_len = req->rq_ldata - ff_lastname - 1;
2490 break;
2491 }
2492
2493 /*
2494 * Update the mask string for the next message.
2495 */
2496 if (mask_len > 255)
2497 mask_len = 255;
2498 if (mask_len)
2499 strncpy(mask, lastname, mask_len);
2500 }
2501 mask_len = strnlen(mask, mask_len);
2502 VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n",
2503 mask_len, ff_lastname, req->rq_ldata, mask_len, mask);
2504
2505 first = 0;
2506 loop_count = 0;
2507 }
2508
2509out_free:
2510 smb_rput(req);
2511out_name:
2512 kfree(name_buf);
2513out:
2514 unlock_kernel();
2515 return result;
2516}
2517
2518/*
2519 * This version uses the trans2 TRANSACT2_FINDFIRST message
2520 * to get the attribute data.
2521 *
2522 * Bugs Noted:
2523 */
2524static int
2525smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
2526 struct smb_fattr *fattr)
2527{
2528 char *param, *mask;
2529 __u16 date, time;
2530 int mask_len, result;
2531 struct smb_request *req;
2532
2533 result = -ENOMEM;
2534 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2535 goto out;
2536 param = req->rq_buffer;
2537 mask = param + 12;
2538
2539 mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL);
2540 if (mask_len < 0) {
2541 result = mask_len;
2542 goto out_free;
2543 }
2544 VERBOSE("name=%s, len=%d\n", mask, mask_len);
2545 WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
2546 WSET(param, 2, 1); /* max count */
2547 WSET(param, 4, 1); /* close after this call */
2548 WSET(param, 6, 1); /* info_level */
2549 DSET(param, 8, 0);
2550
2551 req->rq_trans2_command = TRANSACT2_FINDFIRST;
2552 req->rq_ldata = 0;
2553 req->rq_data = NULL;
2554 req->rq_lparm = 12 + mask_len;
2555 req->rq_parm = param;
2556 req->rq_flags = 0;
2557 result = smb_add_request(req);
2558 if (result < 0)
2559 goto out_free;
2560 if (req->rq_rcls != 0) {
2561 result = smb_errno(req);
2562#ifdef SMBFS_PARANOIA
2563 if (result != -ENOENT)
2564 PARANOIA("error for %s, rcls=%d, err=%d\n",
2565 mask, req->rq_rcls, req->rq_err);
2566#endif
2567 goto out_free;
2568 }
2569 /* Make sure we got enough data ... */
2570 result = -EINVAL;
2571 if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) {
2572 PARANOIA("bad result for %s, len=%d, count=%d\n",
2573 mask, req->rq_ldata, WVAL(req->rq_parm, 2));
2574 goto out_free;
2575 }
2576
2577 /*
2578 * Decode the response into the fattr ...
2579 */
2580 date = WVAL(req->rq_data, 0);
2581 time = WVAL(req->rq_data, 2);
2582 fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2583 fattr->f_ctime.tv_nsec = 0;
2584
2585 date = WVAL(req->rq_data, 4);
2586 time = WVAL(req->rq_data, 6);
2587 fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
2588 fattr->f_atime.tv_nsec = 0;
2589
2590 date = WVAL(req->rq_data, 8);
2591 time = WVAL(req->rq_data, 10);
2592 fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2593 fattr->f_mtime.tv_nsec = 0;
2594 VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
dbaf4c02 2595 mask, date, time, fattr->f_mtime.tv_sec);
1da177e4
LT		 2596 fattr->f_size = DVAL(req->rq_data, 12);
2597 /* ULONG allocation size */
2598 fattr->attr = WVAL(req->rq_data, 20);
2599 result = 0;
2600
2601out_free:
2602 smb_rput(req);
2603out:
2604 return result;
2605}
2606
2607static int
2608smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
2609 struct smb_fattr *fattr)
2610{
2611 int result;
2612 char *p;
2613 struct smb_request *req;
2614
2615 result = -ENOMEM;
2616 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2617 goto out;
2618
2619 p = smb_setup_header(req, SMBgetatr, 0, 0);
2620 result = smb_simple_encode_path(req, &p, dir, NULL);
2621 if (result < 0)
2622 goto out_free;
2623 smb_setup_bcc(req, p);
2624
2625 if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0)
2626 goto out_free;
2627 fattr->attr = WVAL(req->rq_header, smb_vwv0);
2628 fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1));
2629 fattr->f_mtime.tv_nsec = 0;
2630 fattr->f_size = DVAL(req->rq_header, smb_vwv3);
2631 fattr->f_ctime = fattr->f_mtime;
2632 fattr->f_atime = fattr->f_mtime;
2633#ifdef SMBFS_DEBUG_TIMESTAMP
2634 printk("getattr_core: %s/%s, mtime=%ld\n",
2635 DENTRY_PATH(dir), fattr->f_mtime);
2636#endif
2637 result = 0;
2638
2639out_free:
2640 smb_rput(req);
2641out:
2642 return result;
2643}
2644
2645/*
2646 * Bugs Noted:
2647 * (1) Win 95 swaps the date and time fields in the standard info level.
2648 */
2649static int
2650smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir,
2651 struct smb_request *req, int infolevel)
2652{
2653 char *p, *param;
2654 int result;
2655
2656 param = req->rq_buffer;
2657 WSET(param, 0, infolevel);
2658 DSET(param, 2, 0);
2659 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
2660 if (result < 0)
2661 goto out;
2662 p = param + 6 + result;
2663
2664 req->rq_trans2_command = TRANSACT2_QPATHINFO;
2665 req->rq_ldata = 0;
2666 req->rq_data = NULL;
2667 req->rq_lparm = p - param;
2668 req->rq_parm = param;
2669 req->rq_flags = 0;
2670 result = smb_add_request(req);
2671 if (result < 0)
2672 goto out;
2673 if (req->rq_rcls != 0) {
2674 VERBOSE("for %s: result=%d, rcls=%d, err=%d\n",
2675 &param[6], result, req->rq_rcls, req->rq_err);
2676 result = smb_errno(req);
2677 goto out;
2678 }
2679 result = -ENOENT;
2680 if (req->rq_ldata < 22) {
2681 PARANOIA("not enough data for %s, len=%d\n",
2682 &param[6], req->rq_ldata);
2683 goto out;
2684 }
2685
2686 result = 0;
2687out:
2688 return result;
2689}
2690
2691static int
2692smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir,
2693 struct smb_fattr *attr)
2694{
2695 u16 date, time;
2696 int off_date = 0, off_time = 2;
2697 int result;
2698 struct smb_request *req;
2699
2700 result = -ENOMEM;
2701 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2702 goto out;
2703
2704 result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD);
2705 if (result < 0)
2706 goto out_free;
2707
2708 /*
2709 * Kludge alert: Win 95 swaps the date and time field,
2710 * contrary to the CIFS docs and Win NT practice.
2711 */
2712 if (server->mnt->flags & SMB_MOUNT_WIN95) {
2713 off_date = 2;
2714 off_time = 0;
2715 }
2716 date = WVAL(req->rq_data, off_date);
2717 time = WVAL(req->rq_data, off_time);
2718 attr->f_ctime.tv_sec = date_dos2unix(server, date, time);
2719 attr->f_ctime.tv_nsec = 0;
2720
2721 date = WVAL(req->rq_data, 4 + off_date);
2722 time = WVAL(req->rq_data, 4 + off_time);
2723 attr->f_atime.tv_sec = date_dos2unix(server, date, time);
2724 attr->f_atime.tv_nsec = 0;
2725
2726 date = WVAL(req->rq_data, 8 + off_date);
2727 time = WVAL(req->rq_data, 8 + off_time);
2728 attr->f_mtime.tv_sec = date_dos2unix(server, date, time);
2729 attr->f_mtime.tv_nsec = 0;
2730#ifdef SMBFS_DEBUG_TIMESTAMP
2731 printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
2732 DENTRY_PATH(dir), date, time, attr->f_mtime);
2733#endif
2734 attr->f_size = DVAL(req->rq_data, 12);
2735 attr->attr = WVAL(req->rq_data, 20);
2736
2737out_free:
2738 smb_rput(req);
2739out:
2740 return result;
2741}
2742
2743static int
2744smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir,
2745 struct smb_fattr *attr)
2746{
2747 struct smb_request *req;
2748 int result;
2749
2750 result = -ENOMEM;
2751 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2752 goto out;
2753
2754 result = smb_proc_getattr_trans2(server, dir, req,
2755 SMB_QUERY_FILE_ALL_INFO);
2756 if (result < 0)
2757 goto out_free;
2758
2759 attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0));
2760 attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8));
2761 attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16));
2762 /* change (24) */
2763 attr->attr = WVAL(req->rq_data, 32);
2764 /* pad? (34) */
2765 /* allocated size (40) */
2766 attr->f_size = LVAL(req->rq_data, 48);
2767
2768out_free:
2769 smb_rput(req);
2770out:
2771 return result;
2772}
2773
2774static int
2775smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir,
2776 struct smb_fattr *attr)
2777{
2778 struct smb_request *req;
2779 int result;
2780
2781 result = -ENOMEM;
2782 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2783 goto out;
2784
2785 result = smb_proc_getattr_trans2(server, dir, req,
2786 SMB_QUERY_FILE_UNIX_BASIC);
2787 if (result < 0)
2788 goto out_free;
2789
2790 smb_decode_unix_basic(attr, server, req->rq_data);
2791
2792out_free:
2793 smb_rput(req);
2794out:
2795 return result;
2796}
2797
2798static int
2799smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir,
2800 struct smb_fattr *attr)
2801{
2802 struct inode *inode = dir->d_inode;
2803 int result;
2804
2805 /* FIXME: why not use the "all" version? */
2806 result = smb_proc_getattr_trans2_std(server, dir, attr);
2807 if (result < 0)
2808 goto out;
2809
2810 /*
2811 * None of the getattr versions here can make win9x return the right
2812 * filesize if there are changes made to an open file.
2813 * A seek-to-end does return the right size, but we only need to do
2814 * that on files we have written.
2815 */
2816 if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE &&
2817 smb_is_open(inode))
2818 {
2819 __u16 fileid = SMB_I(inode)->fileid;
2820 attr->f_size = smb_proc_seek(server, fileid, 2, 0);
2821 }
2822
2823out:
2824 return result;
2825}
2826
2827static int
2828smb_proc_ops_wait(struct smb_sb_info *server)
2829{
2830 int result;
2831
2832 result = wait_event_interruptible_timeout(server->conn_wq,
2833 server->conn_complete, 30*HZ);
2834
2835 if (!result || signal_pending(current))
2836 return -EIO;
2837
2838 return 0;
2839}
2840
2841static int
2842smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir,
2843 struct smb_fattr *fattr)
2844{
2845 int result;
2846
2847 if (smb_proc_ops_wait(server) < 0)
2848 return -EIO;
2849
2850 smb_init_dirent(server, fattr);
2851 result = server->ops->getattr(server, dir, fattr);
2852 smb_finish_dirent(server, fattr);
2853
2854 return result;
2855}
2856
2857static int
2858smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir,
2859 struct smb_cache_control *ctl)
2860{
17b75e69 2861 struct smb_sb_info *server = server_from_dentry(filp->f_path.dentry);
1da177e4
LT		 2862
2863 if (smb_proc_ops_wait(server) < 0)
2864 return -EIO;
2865
2866 return server->ops->readdir(filp, dirent, filldir, ctl);
2867}
2868
2869int
2870smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
2871{
2872 struct smb_sb_info *server = server_from_dentry(dir);
2873 int result;
2874
2875 smb_init_dirent(server, fattr);
2876 result = server->ops->getattr(server, dir, fattr);
2877 smb_finish_dirent(server, fattr);
2878
2879 return result;
2880}
2881
2882
2883/*
2884 * Because of bugs in the core protocol, we use this only to set
2885 * attributes. See smb_proc_settime() below for timestamp handling.
2886 *
2887 * Bugs Noted:
2888 * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail
2889 * with an undocumented error (ERRDOS code 50). Setting
2890 * mtime to 0 allows the attributes to be set.
2891 * (2) The extra parameters following the name string aren't
2892 * in the CIFS docs, but seem to be necessary for operation.
2893 */
2894static int
2895smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
2896 __u16 attr)
2897{
2898 char *p;
2899 int result;
2900 struct smb_request *req;
2901
2902 result = -ENOMEM;
2903 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
2904 goto out;
2905
2906 p = smb_setup_header(req, SMBsetatr, 8, 0);
2907 WSET(req->rq_header, smb_vwv0, attr);
2908 DSET(req->rq_header, smb_vwv1, 0); /* mtime */
2909 WSET(req->rq_header, smb_vwv3, 0); /* reserved values */
2910 WSET(req->rq_header, smb_vwv4, 0);
2911 WSET(req->rq_header, smb_vwv5, 0);
2912 WSET(req->rq_header, smb_vwv6, 0);
2913 WSET(req->rq_header, smb_vwv7, 0);
2914 result = smb_simple_encode_path(req, &p, dentry, NULL);
2915 if (result < 0)
2916 goto out_free;
2917 if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) {
2918 result = -ENAMETOOLONG;
2919 goto out_free;
2920 }
2921 *p++ = 4;
2922 *p++ = 0;
2923 smb_setup_bcc(req, p);
2924
2925 result = smb_request_ok(req, SMBsetatr, 0, 0);
2926 if (result < 0)
2927 goto out_free;
2928 result = 0;
2929
2930out_free:
2931 smb_rput(req);
2932out:
2933 return result;
2934}
2935
2936/*
2937 * Because of bugs in the trans2 setattr messages, we must set
2938 * attributes and timestamps separately. The core SMBsetatr
2939 * message seems to be the only reliable way to set attributes.
2940 */
2941int
2942smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr)
2943{
2944 struct smb_sb_info *server = server_from_dentry(dir);
2945 int result;
2946
2947 VERBOSE("setting %s/%s, open=%d\n",
2948 DENTRY_PATH(dir), smb_is_open(dir->d_inode));
2949 result = smb_proc_setattr_core(server, dir, fattr->attr);
2950 return result;
2951}
2952
2953/*
2954 * Sets the timestamps for an file open with write permissions.
2955 */
2956static int
2957smb_proc_setattr_ext(struct smb_sb_info *server,
2958 struct inode *inode, struct smb_fattr *fattr)
2959{
2960 __u16 date, time;
2961 int result;
2962 struct smb_request *req;
2963
2964 result = -ENOMEM;
2965 if (! (req = smb_alloc_request(server, 0)))
2966 goto out;
2967
2968 smb_setup_header(req, SMBsetattrE, 7, 0);
2969 WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid);
2970 /* We don't change the creation time */
2971 WSET(req->rq_header, smb_vwv1, 0);
2972 WSET(req->rq_header, smb_vwv2, 0);
2973 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
2974 WSET(req->rq_header, smb_vwv3, date);
2975 WSET(req->rq_header, smb_vwv4, time);
2976 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
2977 WSET(req->rq_header, smb_vwv5, date);
2978 WSET(req->rq_header, smb_vwv6, time);
2979#ifdef SMBFS_DEBUG_TIMESTAMP
2980 printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n",
2981 date, time, fattr->f_mtime);
2982#endif
2983
2984 req->rq_flags |= SMB_REQ_NORETRY;
2985 result = smb_request_ok(req, SMBsetattrE, 0, 0);
2986 if (result < 0)
2987 goto out_free;
2988 result = 0;
2989out_free:
2990 smb_rput(req);
2991out:
2992 return result;
2993}
2994
2995/*
2996 * Bugs Noted:
2997 * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't
2998 * set the file's attribute flags.
2999 */
3000static int
3001smb_proc_setattr_trans2(struct smb_sb_info *server,
3002 struct dentry *dir, struct smb_fattr *fattr)
3003{
3004 __u16 date, time;
3005 char *p, *param;
3006 int result;
3007 char data[26];
3008 struct smb_request *req;
3009
3010 result = -ENOMEM;
3011 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3012 goto out;
3013 param = req->rq_buffer;
3014
3015 WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */
3016 DSET(param, 2, 0);
3017 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
3018 if (result < 0)
3019 goto out_free;
3020 p = param + 6 + result;
3021
3022 WSET(data, 0, 0); /* creation time */
3023 WSET(data, 2, 0);
3024 date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
3025 WSET(data, 4, date);
3026 WSET(data, 6, time);
3027 date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
3028 WSET(data, 8, date);
3029 WSET(data, 10, time);
3030#ifdef SMBFS_DEBUG_TIMESTAMP
3031 printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
3032 DENTRY_PATH(dir), date, time, fattr->f_mtime);
3033#endif
3034 DSET(data, 12, 0); /* size */
3035 DSET(data, 16, 0); /* blksize */
3036 WSET(data, 20, 0); /* attr */
3037 DSET(data, 22, 0); /* ULONG EA size */
3038
3039 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3040 req->rq_ldata = 26;
3041 req->rq_data = data;
3042 req->rq_lparm = p - param;
3043 req->rq_parm = param;
3044 req->rq_flags = 0;
3045 result = smb_add_request(req);
3046 if (result < 0)
3047 goto out_free;
3048 result = 0;
3049 if (req->rq_rcls != 0)
3050 result = smb_errno(req);
3051
3052out_free:
3053 smb_rput(req);
3054out:
3055 return result;
3056}
3057
3058/*
3059 * ATTR_MODE 0x001
3060 * ATTR_UID 0x002
3061 * ATTR_GID 0x004
3062 * ATTR_SIZE 0x008
3063 * ATTR_ATIME 0x010
3064 * ATTR_MTIME 0x020
3065 * ATTR_CTIME 0x040
3066 * ATTR_ATIME_SET 0x080
3067 * ATTR_MTIME_SET 0x100
3068 * ATTR_FORCE 0x200
3069 * ATTR_ATTR_FLAG 0x400
3070 *
3071 * major/minor should only be set by mknod.
3072 */
3073int
3074smb_proc_setattr_unix(struct dentry *d, struct iattr *attr,
3075 unsigned int major, unsigned int minor)
3076{
3077 struct smb_sb_info *server = server_from_dentry(d);
3078 u64 nttime;
3079 char *p, *param;
3080 int result;
3081 char data[100];
3082 struct smb_request *req;
3083
3084 result = -ENOMEM;
3085 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3086 goto out;
3087 param = req->rq_buffer;
3088
3089 DEBUG1("valid flags = 0x%04x\n", attr->ia_valid);
3090
3091 WSET(param, 0, SMB_SET_FILE_UNIX_BASIC);
3092 DSET(param, 2, 0);
3093 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3094 if (result < 0)
3095 goto out_free;
3096 p = param + 6 + result;
3097
3098 /* 0 L file size in bytes */
3099 /* 8 L file size on disk in bytes (block count) */
3100 /* 40 L uid */
3101 /* 48 L gid */
3102 /* 56 W file type enum */
3103 /* 60 L devmajor */
3104 /* 68 L devminor */
3105 /* 76 L unique ID (inode) */
3106 /* 84 L permissions */
3107 /* 92 L link count */
3108 LSET(data, 0, SMB_SIZE_NO_CHANGE);
3109 LSET(data, 8, SMB_SIZE_NO_CHANGE);
3110 LSET(data, 16, SMB_TIME_NO_CHANGE);
3111 LSET(data, 24, SMB_TIME_NO_CHANGE);
3112 LSET(data, 32, SMB_TIME_NO_CHANGE);
3113 LSET(data, 40, SMB_UID_NO_CHANGE);
3114 LSET(data, 48, SMB_GID_NO_CHANGE);
ac34dd05 3115 DSET(data, 56, smb_filetype_from_mode(attr->ia_mode));
1da177e4
LT		 3116 LSET(data, 60, major);
3117 LSET(data, 68, minor);
3118 LSET(data, 76, 0);
3119 LSET(data, 84, SMB_MODE_NO_CHANGE);
3120 LSET(data, 92, 0);
3121
3122 if (attr->ia_valid & ATTR_SIZE) {
3123 LSET(data, 0, attr->ia_size);
3124 LSET(data, 8, 0); /* can't set anyway */
3125 }
3126
3127 /*
3128 * FIXME: check the conversion function it the correct one
3129 *
3130 * we can't set ctime but we might as well pass this to the server
3131 * and let it ignore it.
3132 */
3133 if (attr->ia_valid & ATTR_CTIME) {
3134 nttime = smb_unixutc2ntutc(attr->ia_ctime);
3135 LSET(data, 16, nttime);
3136 }
3137 if (attr->ia_valid & ATTR_ATIME) {
3138 nttime = smb_unixutc2ntutc(attr->ia_atime);
3139 LSET(data, 24, nttime);
3140 }
3141 if (attr->ia_valid & ATTR_MTIME) {
3142 nttime = smb_unixutc2ntutc(attr->ia_mtime);
3143 LSET(data, 32, nttime);
3144 }
3145
3146 if (attr->ia_valid & ATTR_UID) {
3147 LSET(data, 40, attr->ia_uid);
3148 }
3149 if (attr->ia_valid & ATTR_GID) {
3150 LSET(data, 48, attr->ia_gid);
3151 }
3152
3153 if (attr->ia_valid & ATTR_MODE) {
3154 LSET(data, 84, attr->ia_mode);
3155 }
3156
3157 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3158 req->rq_ldata = 100;
3159 req->rq_data = data;
3160 req->rq_lparm = p - param;
3161 req->rq_parm = param;
3162 req->rq_flags = 0;
3163 result = smb_add_request(req);
3164
3165out_free:
3166 smb_rput(req);
3167out:
3168 return result;
3169}
3170
3171
3172/*
3173 * Set the modify and access timestamps for a file.
3174 *
3175 * Incredibly enough, in all of SMB there is no message to allow
3176 * setting both attributes and timestamps at once.
3177 *
3178 * Bugs Noted:
3179 * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message
3180 * with info level 1 (INFO_STANDARD).
3181 * (2) Win 95 seems not to support setting directory timestamps.
3182 * (3) Under the core protocol apparently the only way to set the
3183 * timestamp is to open and close the file.
3184 */
3185int
3186smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
3187{
3188 struct smb_sb_info *server = server_from_dentry(dentry);
3189 struct inode *inode = dentry->d_inode;
3190 int result;
3191
3192 VERBOSE("setting %s/%s, open=%d\n",
3193 DENTRY_PATH(dentry), smb_is_open(inode));
3194
3195 /* setting the time on a Win95 server fails (tridge) */
3196 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 &&
3197 !(server->mnt->flags & SMB_MOUNT_WIN95)) {
3198 if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY)
3199 result = smb_proc_setattr_ext(server, inode, fattr);
3200 else
3201 result = smb_proc_setattr_trans2(server, dentry, fattr);
3202 } else {
3203 /*
3204 * Fail silently on directories ... timestamp can't be set?
3205 */
3206 result = 0;
3207 if (S_ISREG(inode->i_mode)) {
3208 /*
3209 * Set the mtime by opening and closing the file.
3210 * Note that the file is opened read-only, but this
3211 * still allows us to set the date (tridge)
3212 */
3213 result = -EACCES;
3214 if (!smb_is_open(inode))
3215 smb_proc_open(server, dentry, SMB_O_RDONLY);
3216 if (smb_is_open(inode)) {
3217 inode->i_mtime = fattr->f_mtime;
3218 result = smb_proc_close_inode(server, inode);
3219 }
3220 }
3221 }
3222
3223 return result;
3224}
3225
3226int
726c3342 3227smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
1da177e4 3228{
726c3342 3229 struct smb_sb_info *server = SMB_SB(dentry->d_sb);
1da177e4
LT		 3230 int result;
3231 char *p;
3232 long unit;
3233 struct smb_request *req;
3234
3235 result = -ENOMEM;
3236 if (! (req = smb_alloc_request(server, 0)))
3237 goto out;
3238
3239 smb_setup_header(req, SMBdskattr, 0, 0);
3240 if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0)
3241 goto out_free;
3242 p = SMB_VWV(req->rq_header);
3243 unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT;
3244 attr->f_blocks = WVAL(p, 0) * unit;
3245 attr->f_bsize = SMB_ST_BLKSIZE;
3246 attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit;
3247 result = 0;
3248
3249out_free:
3250 smb_rput(req);
3251out:
3252 return result;
3253}
3254
3255int
3256smb_proc_read_link(struct smb_sb_info *server, struct dentry *d,
3257 char *buffer, int len)
3258{
3259 char *p, *param;
3260 int result;
3261 struct smb_request *req;
3262
3263 DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d));
3264
3265 result = -ENOMEM;
3266 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3267 goto out;
3268 param = req->rq_buffer;
3269
3270 WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK);
3271 DSET(param, 2, 0);
3272 result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
3273 if (result < 0)
3274 goto out_free;
3275 p = param + 6 + result;
3276
3277 req->rq_trans2_command = TRANSACT2_QPATHINFO;
3278 req->rq_ldata = 0;
3279 req->rq_data = NULL;
3280 req->rq_lparm = p - param;
3281 req->rq_parm = param;
3282 req->rq_flags = 0;
3283 result = smb_add_request(req);
3284 if (result < 0)
3285 goto out_free;
3286 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3287 &param[6], result, req->rq_rcls, req->rq_err);
3288
3289 /* copy data up to the \0 or buffer length */
3290 result = len;
3291 if (req->rq_ldata < len)
3292 result = req->rq_ldata;
3293 strncpy(buffer, req->rq_data, result);
3294
3295out_free:
3296 smb_rput(req);
3297out:
3298 return result;
3299}
3300
3301
3302/*
3303 * Create a symlink object called dentry which points to oldpath.
3304 * Samba does not permit dangling links but returns a suitable error message.
3305 */
3306int
3307smb_proc_symlink(struct smb_sb_info *server, struct dentry *d,
3308 const char *oldpath)
3309{
3310 char *p, *param;
3311 int result;
3312 struct smb_request *req;
3313
3314 result = -ENOMEM;
3315 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3316 goto out;
3317 param = req->rq_buffer;
3318
3319 WSET(param, 0, SMB_SET_FILE_UNIX_LINK);
3320 DSET(param, 2, 0);
3321 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL);
3322 if (result < 0)
3323 goto out_free;
3324 p = param + 6 + result;
3325
3326 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3327 req->rq_ldata = strlen(oldpath) + 1;
3328 req->rq_data = (char *) oldpath;
3329 req->rq_lparm = p - param;
3330 req->rq_parm = param;
3331 req->rq_flags = 0;
3332 result = smb_add_request(req);
3333 if (result < 0)
3334 goto out_free;
3335
3336 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3337 &param[6], result, req->rq_rcls, req->rq_err);
3338 result = 0;
3339
3340out_free:
3341 smb_rput(req);
3342out:
3343 return result;
3344}
3345
3346/*
3347 * Create a hard link object called new_dentry which points to dentry.
3348 */
3349int
3350smb_proc_link(struct smb_sb_info *server, struct dentry *dentry,
3351 struct dentry *new_dentry)
3352{
3353 char *p, *param;
3354 int result;
3355 struct smb_request *req;
3356
3357 result = -ENOMEM;
3358 if (! (req = smb_alloc_request(server, PAGE_SIZE)))
3359 goto out;
3360 param = req->rq_buffer;
3361
3362 WSET(param, 0, SMB_SET_FILE_UNIX_HLINK);
3363 DSET(param, 2, 0);
3364 result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1,
3365 new_dentry, NULL);
3366 if (result < 0)
3367 goto out_free;
3368 p = param + 6 + result;
3369
3370 /* Grr, pointless separation of parameters and data ... */
3371 req->rq_data = p;
3372 req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1,
3373 dentry, NULL);
3374
3375 req->rq_trans2_command = TRANSACT2_SETPATHINFO;
3376 req->rq_lparm = p - param;
3377 req->rq_parm = param;
3378 req->rq_flags = 0;
3379 result = smb_add_request(req);
3380 if (result < 0)
3381 goto out_free;
3382
3383 DEBUG1("for %s: result=%d, rcls=%d, err=%d\n",
3384 &param[6], result, req->rq_rcls, req->rq_err);
3385 result = 0;
3386
3387out_free:
3388 smb_rput(req);
3389out:
3390 return result;
3391}
3392
3393static int
3394smb_proc_query_cifsunix(struct smb_sb_info *server)
3395{
3396 int result;
3397 int major, minor;
3398 u64 caps;
3399 char param[2];
3400 struct smb_request *req;
3401
3402 result = -ENOMEM;
3403 if (! (req = smb_alloc_request(server, 100)))
3404 goto out;
3405
3406 WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO);
3407
3408 req->rq_trans2_command = TRANSACT2_QFSINFO;
3409 req->rq_ldata = 0;
3410 req->rq_data = NULL;
3411 req->rq_lparm = 2;
3412 req->rq_parm = param;
3413 req->rq_flags = 0;
3414 result = smb_add_request(req);
3415 if (result < 0)
3416 goto out_free;
3417
3418 if (req->rq_ldata < 12) {
3419 PARANOIA("Not enough data\n");
3420 goto out_free;
3421 }
3422 major = WVAL(req->rq_data, 0);
3423 minor = WVAL(req->rq_data, 2);
3424
3425 DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n",
3426 major, minor);
3427 /* FIXME: verify that we are ok with this major/minor? */
3428
3429 caps = LVAL(req->rq_data, 4);
3430 DEBUG1("Server capabilities 0x%016llx\n", caps);
3431
3432out_free:
3433 smb_rput(req);
3434out:
3435 return result;
3436}
3437
3438
3439static void
3440install_ops(struct smb_ops *dst, struct smb_ops *src)
3441{
3442 memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC);
3443}
3444
3445/* < LANMAN2 */
3446static struct smb_ops smb_ops_core =
3447{
3448 .read = smb_proc_read,
3449 .write = smb_proc_write,
3450 .readdir = smb_proc_readdir_short,
3451 .getattr = smb_proc_getattr_core,
3452 .truncate = smb_proc_trunc32,
3453};
3454
3455/* LANMAN2, OS/2, others? */
3456static struct smb_ops smb_ops_os2 =
3457{
3458 .read = smb_proc_read,
3459 .write = smb_proc_write,
3460 .readdir = smb_proc_readdir_long,
3461 .getattr = smb_proc_getattr_trans2_std,
3462 .truncate = smb_proc_trunc32,
3463};
3464
3465/* Win95, and possibly some NetApp versions too */
3466static struct smb_ops smb_ops_win95 =
3467{
3468 .read = smb_proc_read, /* does not support 12word readX */
3469 .write = smb_proc_write,
3470 .readdir = smb_proc_readdir_long,
3471 .getattr = smb_proc_getattr_95,
3472 .truncate = smb_proc_trunc95,
3473};
3474
3475/* Samba, NT4 and NT5 */
3476static struct smb_ops smb_ops_winNT =
3477{
3478 .read = smb_proc_readX,
3479 .write = smb_proc_writeX,
3480 .readdir = smb_proc_readdir_long,
3481 .getattr = smb_proc_getattr_trans2_all,
3482 .truncate = smb_proc_trunc64,
3483};
3484
3485/* Samba w/ unix extensions. Others? */
3486static struct smb_ops smb_ops_unix =
3487{
3488 .read = smb_proc_readX,
3489 .write = smb_proc_writeX,
3490 .readdir = smb_proc_readdir_long,
3491 .getattr = smb_proc_getattr_unix,
3492 /* FIXME: core/ext/time setattr needs to be cleaned up! */
3493 /* .setattr = smb_proc_setattr_unix, */
3494 .truncate = smb_proc_trunc64,
3495};
3496
3497/* Place holder until real ops are in place */
3498static struct smb_ops smb_ops_null =
3499{
3500 .readdir = smb_proc_readdir_null,
3501 .getattr = smb_proc_getattr_null,
3502};
3503
3504void smb_install_null_ops(struct smb_ops *ops)
3505{
3506 install_ops(ops, &smb_ops_null);
3507}
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