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1da177e4 LT |
1 | /* |
2 | * fs/cifs/misc.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2004 | |
5 | * Author(s): Steve French (sfrench@us.ibm.com) | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/slab.h> | |
23 | #include <linux/ctype.h> | |
24 | #include <linux/mempool.h> | |
25 | #include "cifspdu.h" | |
26 | #include "cifsglob.h" | |
27 | #include "cifsproto.h" | |
28 | #include "cifs_debug.h" | |
29 | #include "smberr.h" | |
30 | #include "nterr.h" | |
6c91d362 | 31 | #include "cifs_unicode.h" |
1da177e4 LT |
32 | |
33 | extern mempool_t *cifs_sm_req_poolp; | |
34 | extern mempool_t *cifs_req_poolp; | |
35 | extern struct task_struct * oplockThread; | |
36 | ||
1da177e4 LT |
37 | /* The xid serves as a useful identifier for each incoming vfs request, |
38 | in a similar way to the mid which is useful to track each sent smb, | |
39 | and CurrentXid can also provide a running counter (although it | |
40 | will eventually wrap past zero) of the total vfs operations handled | |
41 | since the cifs fs was mounted */ | |
42 | ||
43 | unsigned int | |
44 | _GetXid(void) | |
45 | { | |
46 | unsigned int xid; | |
47 | ||
48 | spin_lock(&GlobalMid_Lock); | |
49 | GlobalTotalActiveXid++; | |
50 | if (GlobalTotalActiveXid > GlobalMaxActiveXid) | |
51 | GlobalMaxActiveXid = GlobalTotalActiveXid; /* keep high water mark for number of simultaneous vfs ops in our filesystem */ | |
1982c344 SF |
52 | if(GlobalTotalActiveXid > 65000) |
53 | cFYI(1,("warning: more than 65000 requests active")); | |
1da177e4 LT |
54 | xid = GlobalCurrentXid++; |
55 | spin_unlock(&GlobalMid_Lock); | |
56 | return xid; | |
57 | } | |
58 | ||
59 | void | |
60 | _FreeXid(unsigned int xid) | |
61 | { | |
62 | spin_lock(&GlobalMid_Lock); | |
63 | /* if(GlobalTotalActiveXid == 0) | |
64 | BUG(); */ | |
65 | GlobalTotalActiveXid--; | |
66 | spin_unlock(&GlobalMid_Lock); | |
67 | } | |
68 | ||
69 | struct cifsSesInfo * | |
70 | sesInfoAlloc(void) | |
71 | { | |
72 | struct cifsSesInfo *ret_buf; | |
73 | ||
74 | ret_buf = | |
75 | (struct cifsSesInfo *) kmalloc(sizeof (struct cifsSesInfo), | |
76 | GFP_KERNEL); | |
77 | if (ret_buf) { | |
78 | memset(ret_buf, 0, sizeof (struct cifsSesInfo)); | |
79 | write_lock(&GlobalSMBSeslock); | |
80 | atomic_inc(&sesInfoAllocCount); | |
81 | ret_buf->status = CifsNew; | |
82 | list_add(&ret_buf->cifsSessionList, &GlobalSMBSessionList); | |
83 | init_MUTEX(&ret_buf->sesSem); | |
84 | write_unlock(&GlobalSMBSeslock); | |
85 | } | |
86 | return ret_buf; | |
87 | } | |
88 | ||
89 | void | |
90 | sesInfoFree(struct cifsSesInfo *buf_to_free) | |
91 | { | |
92 | if (buf_to_free == NULL) { | |
93 | cFYI(1, ("Null buffer passed to sesInfoFree")); | |
94 | return; | |
95 | } | |
96 | ||
97 | write_lock(&GlobalSMBSeslock); | |
98 | atomic_dec(&sesInfoAllocCount); | |
99 | list_del(&buf_to_free->cifsSessionList); | |
100 | write_unlock(&GlobalSMBSeslock); | |
f99d49ad JJ |
101 | kfree(buf_to_free->serverOS); |
102 | kfree(buf_to_free->serverDomain); | |
103 | kfree(buf_to_free->serverNOS); | |
104 | kfree(buf_to_free->password); | |
1da177e4 LT |
105 | kfree(buf_to_free); |
106 | } | |
107 | ||
108 | struct cifsTconInfo * | |
109 | tconInfoAlloc(void) | |
110 | { | |
111 | struct cifsTconInfo *ret_buf; | |
112 | ret_buf = | |
113 | (struct cifsTconInfo *) kmalloc(sizeof (struct cifsTconInfo), | |
114 | GFP_KERNEL); | |
115 | if (ret_buf) { | |
116 | memset(ret_buf, 0, sizeof (struct cifsTconInfo)); | |
117 | write_lock(&GlobalSMBSeslock); | |
118 | atomic_inc(&tconInfoAllocCount); | |
119 | list_add(&ret_buf->cifsConnectionList, | |
120 | &GlobalTreeConnectionList); | |
121 | ret_buf->tidStatus = CifsNew; | |
122 | INIT_LIST_HEAD(&ret_buf->openFileList); | |
123 | init_MUTEX(&ret_buf->tconSem); | |
124 | #ifdef CONFIG_CIFS_STATS | |
125 | spin_lock_init(&ret_buf->stat_lock); | |
126 | #endif | |
127 | write_unlock(&GlobalSMBSeslock); | |
128 | } | |
129 | return ret_buf; | |
130 | } | |
131 | ||
132 | void | |
133 | tconInfoFree(struct cifsTconInfo *buf_to_free) | |
134 | { | |
135 | if (buf_to_free == NULL) { | |
136 | cFYI(1, ("Null buffer passed to tconInfoFree")); | |
137 | return; | |
138 | } | |
139 | write_lock(&GlobalSMBSeslock); | |
140 | atomic_dec(&tconInfoAllocCount); | |
141 | list_del(&buf_to_free->cifsConnectionList); | |
142 | write_unlock(&GlobalSMBSeslock); | |
f99d49ad | 143 | kfree(buf_to_free->nativeFileSystem); |
1da177e4 LT |
144 | kfree(buf_to_free); |
145 | } | |
146 | ||
147 | struct smb_hdr * | |
148 | cifs_buf_get(void) | |
149 | { | |
150 | struct smb_hdr *ret_buf = NULL; | |
151 | ||
152 | /* We could use negotiated size instead of max_msgsize - | |
153 | but it may be more efficient to always alloc same size | |
154 | albeit slightly larger than necessary and maxbuffersize | |
155 | defaults to this and can not be bigger */ | |
156 | ret_buf = | |
157 | (struct smb_hdr *) mempool_alloc(cifs_req_poolp, SLAB_KERNEL | SLAB_NOFS); | |
158 | ||
159 | /* clear the first few header bytes */ | |
160 | /* for most paths, more is cleared in header_assemble */ | |
161 | if (ret_buf) { | |
162 | memset(ret_buf, 0, sizeof(struct smb_hdr) + 3); | |
163 | atomic_inc(&bufAllocCount); | |
164 | } | |
165 | ||
166 | return ret_buf; | |
167 | } | |
168 | ||
169 | void | |
170 | cifs_buf_release(void *buf_to_free) | |
171 | { | |
172 | ||
173 | if (buf_to_free == NULL) { | |
174 | /* cFYI(1, ("Null buffer passed to cifs_buf_release"));*/ | |
175 | return; | |
176 | } | |
177 | mempool_free(buf_to_free,cifs_req_poolp); | |
178 | ||
179 | atomic_dec(&bufAllocCount); | |
180 | return; | |
181 | } | |
182 | ||
183 | struct smb_hdr * | |
184 | cifs_small_buf_get(void) | |
185 | { | |
186 | struct smb_hdr *ret_buf = NULL; | |
187 | ||
188 | /* We could use negotiated size instead of max_msgsize - | |
189 | but it may be more efficient to always alloc same size | |
190 | albeit slightly larger than necessary and maxbuffersize | |
191 | defaults to this and can not be bigger */ | |
192 | ret_buf = | |
193 | (struct smb_hdr *) mempool_alloc(cifs_sm_req_poolp, SLAB_KERNEL | SLAB_NOFS); | |
194 | if (ret_buf) { | |
195 | /* No need to clear memory here, cleared in header assemble */ | |
196 | /* memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/ | |
197 | atomic_inc(&smBufAllocCount); | |
198 | } | |
199 | return ret_buf; | |
200 | } | |
201 | ||
202 | void | |
203 | cifs_small_buf_release(void *buf_to_free) | |
204 | { | |
205 | ||
206 | if (buf_to_free == NULL) { | |
207 | cFYI(1, ("Null buffer passed to cifs_small_buf_release")); | |
208 | return; | |
209 | } | |
210 | mempool_free(buf_to_free,cifs_sm_req_poolp); | |
211 | ||
212 | atomic_dec(&smBufAllocCount); | |
213 | return; | |
214 | } | |
215 | ||
1982c344 SF |
216 | /* |
217 | Find a free multiplex id (SMB mid). Otherwise there could be | |
218 | mid collisions which might cause problems, demultiplexing the | |
219 | wrong response to this request. Multiplex ids could collide if | |
220 | one of a series requests takes much longer than the others, or | |
221 | if a very large number of long lived requests (byte range | |
222 | locks or FindNotify requests) are pending. No more than | |
223 | 64K-1 requests can be outstanding at one time. If no | |
224 | mids are available, return zero. A future optimization | |
225 | could make the combination of mids and uid the key we use | |
226 | to demultiplex on (rather than mid alone). | |
227 | In addition to the above check, the cifs demultiplex | |
228 | code already used the command code as a secondary | |
229 | check of the frame and if signing is negotiated the | |
230 | response would be discarded if the mid were the same | |
231 | but the signature was wrong. Since the mid is not put in the | |
232 | pending queue until later (when it is about to be dispatched) | |
233 | we do have to limit the number of outstanding requests | |
234 | to somewhat less than 64K-1 although it is hard to imagine | |
235 | so many threads being in the vfs at one time. | |
236 | */ | |
237 | __u16 GetNextMid(struct TCP_Server_Info *server) | |
238 | { | |
239 | __u16 mid = 0; | |
240 | __u16 last_mid; | |
241 | int collision; | |
242 | ||
243 | if(server == NULL) | |
244 | return mid; | |
245 | ||
246 | spin_lock(&GlobalMid_Lock); | |
247 | last_mid = server->CurrentMid; /* we do not want to loop forever */ | |
248 | server->CurrentMid++; | |
249 | /* This nested loop looks more expensive than it is. | |
250 | In practice the list of pending requests is short, | |
251 | fewer than 50, and the mids are likely to be unique | |
252 | on the first pass through the loop unless some request | |
253 | takes longer than the 64 thousand requests before it | |
254 | (and it would also have to have been a request that | |
255 | did not time out) */ | |
256 | while(server->CurrentMid != last_mid) { | |
257 | struct list_head *tmp; | |
258 | struct mid_q_entry *mid_entry; | |
259 | ||
260 | collision = 0; | |
261 | if(server->CurrentMid == 0) | |
262 | server->CurrentMid++; | |
263 | ||
264 | list_for_each(tmp, &server->pending_mid_q) { | |
265 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
266 | ||
267 | if ((mid_entry->mid == server->CurrentMid) && | |
268 | (mid_entry->midState == MID_REQUEST_SUBMITTED)) { | |
269 | /* This mid is in use, try a different one */ | |
270 | collision = 1; | |
271 | break; | |
272 | } | |
273 | } | |
274 | if(collision == 0) { | |
275 | mid = server->CurrentMid; | |
276 | break; | |
277 | } | |
278 | server->CurrentMid++; | |
279 | } | |
280 | spin_unlock(&GlobalMid_Lock); | |
281 | return mid; | |
282 | } | |
283 | ||
284 | /* NB: MID can not be set if treeCon not passed in, in that | |
285 | case it is responsbility of caller to set the mid */ | |
1da177e4 LT |
286 | void |
287 | header_assemble(struct smb_hdr *buffer, char smb_command /* command */ , | |
288 | const struct cifsTconInfo *treeCon, int word_count | |
289 | /* length of fixed section (word count) in two byte units */) | |
290 | { | |
291 | struct list_head* temp_item; | |
292 | struct cifsSesInfo * ses; | |
293 | char *temp = (char *) buffer; | |
294 | ||
295 | memset(temp,0,MAX_CIFS_HDR_SIZE); | |
296 | ||
297 | buffer->smb_buf_length = | |
298 | (2 * word_count) + sizeof (struct smb_hdr) - | |
299 | 4 /* RFC 1001 length field does not count */ + | |
300 | 2 /* for bcc field itself */ ; | |
1982c344 SF |
301 | /* Note that this is the only network field that has to be converted |
302 | to big endian and it is done just before we send it */ | |
1da177e4 LT |
303 | |
304 | buffer->Protocol[0] = 0xFF; | |
305 | buffer->Protocol[1] = 'S'; | |
306 | buffer->Protocol[2] = 'M'; | |
307 | buffer->Protocol[3] = 'B'; | |
308 | buffer->Command = smb_command; | |
309 | buffer->Flags = 0x00; /* case sensitive */ | |
310 | buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES; | |
311 | buffer->Pid = cpu_to_le16((__u16)current->tgid); | |
312 | buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16)); | |
313 | spin_lock(&GlobalMid_Lock); | |
1da177e4 LT |
314 | spin_unlock(&GlobalMid_Lock); |
315 | if (treeCon) { | |
316 | buffer->Tid = treeCon->tid; | |
317 | if (treeCon->ses) { | |
318 | if (treeCon->ses->capabilities & CAP_UNICODE) | |
319 | buffer->Flags2 |= SMBFLG2_UNICODE; | |
320 | if (treeCon->ses->capabilities & CAP_STATUS32) { | |
321 | buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
322 | } | |
1982c344 SF |
323 | /* Uid is not converted */ |
324 | buffer->Uid = treeCon->ses->Suid; | |
325 | buffer->Mid = GetNextMid(treeCon->ses->server); | |
1da177e4 LT |
326 | if(multiuser_mount != 0) { |
327 | /* For the multiuser case, there are few obvious technically */ | |
328 | /* possible mechanisms to match the local linux user (uid) */ | |
329 | /* to a valid remote smb user (smb_uid): */ | |
330 | /* 1) Query Winbind (or other local pam/nss daemon */ | |
331 | /* for userid/password/logon_domain or credential */ | |
332 | /* 2) Query Winbind for uid to sid to username mapping */ | |
333 | /* and see if we have a matching password for existing*/ | |
334 | /* session for that user perhas getting password by */ | |
335 | /* adding a new pam_cifs module that stores passwords */ | |
336 | /* so that the cifs vfs can get at that for all logged*/ | |
337 | /* on users */ | |
338 | /* 3) (Which is the mechanism we have chosen) */ | |
339 | /* Search through sessions to the same server for a */ | |
340 | /* a match on the uid that was passed in on mount */ | |
341 | /* with the current processes uid (or euid?) and use */ | |
342 | /* that smb uid. If no existing smb session for */ | |
343 | /* that uid found, use the default smb session ie */ | |
344 | /* the smb session for the volume mounted which is */ | |
345 | /* the same as would be used if the multiuser mount */ | |
346 | /* flag were disabled. */ | |
347 | ||
348 | /* BB Add support for establishing new tCon and SMB Session */ | |
349 | /* with userid/password pairs found on the smb session */ | |
350 | /* for other target tcp/ip addresses BB */ | |
351 | if(current->uid != treeCon->ses->linux_uid) { | |
352 | cFYI(1,("Multiuser mode and UID did not match tcon uid ")); | |
353 | read_lock(&GlobalSMBSeslock); | |
354 | list_for_each(temp_item, &GlobalSMBSessionList) { | |
355 | ses = list_entry(temp_item, struct cifsSesInfo, cifsSessionList); | |
356 | if(ses->linux_uid == current->uid) { | |
357 | if(ses->server == treeCon->ses->server) { | |
358 | cFYI(1,("found matching uid substitute right smb_uid")); | |
359 | buffer->Uid = ses->Suid; | |
360 | break; | |
361 | } else { | |
362 | /* BB eventually call cifs_setup_session here */ | |
363 | cFYI(1,("local UID found but smb sess with this server does not exist")); | |
364 | } | |
365 | } | |
366 | } | |
367 | read_unlock(&GlobalSMBSeslock); | |
368 | } | |
369 | } | |
370 | } | |
371 | if (treeCon->Flags & SMB_SHARE_IS_IN_DFS) | |
372 | buffer->Flags2 |= SMBFLG2_DFS; | |
d3485d37 SF |
373 | if (treeCon->nocase) |
374 | buffer->Flags |= SMBFLG_CASELESS; | |
1da177e4 LT |
375 | if((treeCon->ses) && (treeCon->ses->server)) |
376 | if(treeCon->ses->server->secMode & | |
377 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
378 | buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; | |
379 | } | |
380 | ||
381 | /* endian conversion of flags is now done just before sending */ | |
382 | buffer->WordCount = (char) word_count; | |
383 | return; | |
384 | } | |
385 | ||
386 | int | |
387 | checkSMBhdr(struct smb_hdr *smb, __u16 mid) | |
388 | { | |
389 | /* Make sure that this really is an SMB, that it is a response, | |
390 | and that the message ids match */ | |
391 | if ((*(__le32 *) smb->Protocol == cpu_to_le32(0x424d53ff)) && | |
392 | (mid == smb->Mid)) { | |
393 | if(smb->Flags & SMBFLG_RESPONSE) | |
394 | return 0; | |
395 | else { | |
396 | /* only one valid case where server sends us request */ | |
397 | if(smb->Command == SMB_COM_LOCKING_ANDX) | |
398 | return 0; | |
399 | else | |
6ab16d24 | 400 | cERROR(1, ("Rcvd Request not response")); |
1da177e4 LT |
401 | } |
402 | } else { /* bad signature or mid */ | |
403 | if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) | |
404 | cERROR(1, | |
6ab16d24 | 405 | ("Bad protocol string signature header %x", |
1da177e4 LT |
406 | *(unsigned int *) smb->Protocol)); |
407 | if (mid != smb->Mid) | |
408 | cERROR(1, ("Mids do not match")); | |
409 | } | |
410 | cERROR(1, ("bad smb detected. The Mid=%d", smb->Mid)); | |
411 | return 1; | |
412 | } | |
413 | ||
414 | int | |
415 | checkSMB(struct smb_hdr *smb, __u16 mid, int length) | |
416 | { | |
70ca734a | 417 | __u32 len = smb->smb_buf_length; |
190fdeb8 | 418 | __u32 clc_len; /* calculated length */ |
1da177e4 | 419 | cFYI(0, |
6ab16d24 | 420 | ("Entering checkSMB with Length: %x, smb_buf_length: %x", |
1da177e4 LT |
421 | length, len)); |
422 | if (((unsigned int)length < 2 + sizeof (struct smb_hdr)) || | |
423 | (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4)) { | |
424 | if ((unsigned int)length < 2 + sizeof (struct smb_hdr)) { | |
425 | if (((unsigned int)length >= | |
426 | sizeof (struct smb_hdr) - 1) | |
427 | && (smb->Status.CifsError != 0)) { | |
428 | smb->WordCount = 0; | |
429 | return 0; /* some error cases do not return wct and bcc */ | |
430 | } else { | |
431 | cERROR(1, ("Length less than smb header size")); | |
432 | } | |
433 | ||
434 | } | |
435 | if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) | |
436 | cERROR(1, | |
437 | ("smb_buf_length greater than MaxBufSize")); | |
438 | cERROR(1, | |
190fdeb8 | 439 | ("bad smb detected. Illegal length. mid=%d", |
1da177e4 LT |
440 | smb->Mid)); |
441 | return 1; | |
442 | } | |
443 | ||
444 | if (checkSMBhdr(smb, mid)) | |
445 | return 1; | |
190fdeb8 SF |
446 | clc_len = smbCalcSize_LE(smb); |
447 | if ((4 + len != clc_len) | |
1da177e4 | 448 | || (4 + len != (unsigned int)length)) { |
190fdeb8 SF |
449 | cERROR(1, ("Calculated size 0x%x vs actual length 0x%x", |
450 | clc_len, 4 + len)); | |
451 | cERROR(1, ("bad smb size detected for Mid=%d", smb->Mid)); | |
452 | /* Windows XP can return a few bytes too much, presumably | |
453 | an illegal pad, at the end of byte range lock responses | |
6ab16d24 | 454 | so we allow for that three byte pad, as long as actual |
190fdeb8 | 455 | received length is as long or longer than calculated length */ |
6ab16d24 SF |
456 | /* We have now had to extend this more, since there is a |
457 | case in which it needs to be bigger still to handle a | |
458 | malformed response to transact2 findfirst from WinXP when | |
459 | access denied is returned and thus bcc and wct are zero | |
460 | but server says length is 0x21 bytes too long as if the server | |
461 | forget to reset the smb rfc1001 length when it reset the | |
462 | wct and bcc to minimum size and drop the t2 parms and data */ | |
463 | if((4+len > clc_len) && (len <= clc_len + 512)) | |
190fdeb8 SF |
464 | return 0; |
465 | else | |
466 | return 1; | |
1da177e4 | 467 | } |
20962438 | 468 | return 0; |
1da177e4 LT |
469 | } |
470 | int | |
471 | is_valid_oplock_break(struct smb_hdr *buf) | |
472 | { | |
473 | struct smb_com_lock_req * pSMB = (struct smb_com_lock_req *)buf; | |
474 | struct list_head *tmp; | |
475 | struct list_head *tmp1; | |
476 | struct cifsTconInfo *tcon; | |
477 | struct cifsFileInfo *netfile; | |
478 | ||
479 | cFYI(1,("Checking for oplock break or dnotify response")); | |
480 | if((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) && | |
481 | (pSMB->hdr.Flags & SMBFLG_RESPONSE)) { | |
482 | struct smb_com_transaction_change_notify_rsp * pSMBr = | |
483 | (struct smb_com_transaction_change_notify_rsp *)buf; | |
484 | struct file_notify_information * pnotify; | |
485 | __u32 data_offset = 0; | |
486 | if(pSMBr->ByteCount > sizeof(struct file_notify_information)) { | |
487 | data_offset = le32_to_cpu(pSMBr->DataOffset); | |
488 | ||
489 | pnotify = (struct file_notify_information *)((char *)&pSMBr->hdr.Protocol | |
490 | + data_offset); | |
491 | cFYI(1,("dnotify on %s with action: 0x%x",pnotify->FileName, | |
492 | pnotify->Action)); /* BB removeme BB */ | |
493 | /* cifs_dump_mem("Received notify Data is: ",buf,sizeof(struct smb_hdr)+60); */ | |
494 | return TRUE; | |
495 | } | |
496 | if(pSMBr->hdr.Status.CifsError) { | |
497 | cFYI(1,("notify err 0x%d",pSMBr->hdr.Status.CifsError)); | |
498 | return TRUE; | |
499 | } | |
500 | return FALSE; | |
501 | } | |
502 | if(pSMB->hdr.Command != SMB_COM_LOCKING_ANDX) | |
503 | return FALSE; | |
504 | if(pSMB->hdr.Flags & SMBFLG_RESPONSE) { | |
505 | /* no sense logging error on invalid handle on oplock | |
506 | break - harmless race between close request and oplock | |
507 | break response is expected from time to time writing out | |
508 | large dirty files cached on the client */ | |
509 | if ((NT_STATUS_INVALID_HANDLE) == | |
510 | le32_to_cpu(pSMB->hdr.Status.CifsError)) { | |
511 | cFYI(1,("invalid handle on oplock break")); | |
512 | return TRUE; | |
513 | } else if (ERRbadfid == | |
514 | le16_to_cpu(pSMB->hdr.Status.DosError.Error)) { | |
515 | return TRUE; | |
516 | } else { | |
517 | return FALSE; /* on valid oplock brk we get "request" */ | |
518 | } | |
519 | } | |
520 | if(pSMB->hdr.WordCount != 8) | |
521 | return FALSE; | |
522 | ||
523 | cFYI(1,(" oplock type 0x%d level 0x%d",pSMB->LockType,pSMB->OplockLevel)); | |
524 | if(!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)) | |
525 | return FALSE; | |
526 | ||
527 | /* look up tcon based on tid & uid */ | |
528 | read_lock(&GlobalSMBSeslock); | |
529 | list_for_each(tmp, &GlobalTreeConnectionList) { | |
530 | tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList); | |
531 | if (tcon->tid == buf->Tid) { | |
a4544347 | 532 | cifs_stats_inc(&tcon->num_oplock_brks); |
1da177e4 | 533 | list_for_each(tmp1,&tcon->openFileList){ |
57337e42 SF |
534 | netfile = list_entry(tmp1,struct cifsFileInfo, |
535 | tlist); | |
1da177e4 LT |
536 | if(pSMB->Fid == netfile->netfid) { |
537 | struct cifsInodeInfo *pCifsInode; | |
538 | read_unlock(&GlobalSMBSeslock); | |
57337e42 | 539 | cFYI(1,("file id match, oplock break")); |
1da177e4 LT |
540 | pCifsInode = |
541 | CIFS_I(netfile->pInode); | |
542 | pCifsInode->clientCanCacheAll = FALSE; | |
543 | if(pSMB->OplockLevel == 0) | |
57337e42 SF |
544 | pCifsInode->clientCanCacheRead |
545 | = FALSE; | |
1da177e4 | 546 | pCifsInode->oplockPending = TRUE; |
57337e42 SF |
547 | AllocOplockQEntry(netfile->pInode, |
548 | netfile->netfid, | |
549 | tcon); | |
1da177e4 | 550 | cFYI(1,("about to wake up oplock thd")); |
57337e42 SF |
551 | if(oplockThread) |
552 | wake_up_process(oplockThread); | |
1da177e4 LT |
553 | return TRUE; |
554 | } | |
555 | } | |
556 | read_unlock(&GlobalSMBSeslock); | |
57337e42 | 557 | cFYI(1,("No matching file for oplock break")); |
1da177e4 LT |
558 | return TRUE; |
559 | } | |
560 | } | |
561 | read_unlock(&GlobalSMBSeslock); | |
562 | cFYI(1,("Can not process oplock break for non-existent connection")); | |
563 | return TRUE; | |
564 | } | |
565 | ||
566 | void | |
567 | dump_smb(struct smb_hdr *smb_buf, int smb_buf_length) | |
568 | { | |
569 | int i, j; | |
570 | char debug_line[17]; | |
571 | unsigned char *buffer; | |
572 | ||
573 | if (traceSMB == 0) | |
574 | return; | |
575 | ||
576 | buffer = (unsigned char *) smb_buf; | |
577 | for (i = 0, j = 0; i < smb_buf_length; i++, j++) { | |
57337e42 | 578 | if (i % 8 == 0) { /* have reached the beginning of line */ |
1da177e4 LT |
579 | printk(KERN_DEBUG "| "); |
580 | j = 0; | |
581 | } | |
582 | printk("%0#4x ", buffer[i]); | |
583 | debug_line[2 * j] = ' '; | |
584 | if (isprint(buffer[i])) | |
585 | debug_line[1 + (2 * j)] = buffer[i]; | |
586 | else | |
587 | debug_line[1 + (2 * j)] = '_'; | |
588 | ||
57337e42 | 589 | if (i % 8 == 7) { /* reached end of line, time to print ascii */ |
1da177e4 LT |
590 | debug_line[16] = 0; |
591 | printk(" | %s\n", debug_line); | |
592 | } | |
593 | } | |
594 | for (; j < 8; j++) { | |
595 | printk(" "); | |
596 | debug_line[2 * j] = ' '; | |
597 | debug_line[1 + (2 * j)] = ' '; | |
598 | } | |
599 | printk( " | %s\n", debug_line); | |
600 | return; | |
601 | } | |
6a0b4824 | 602 | |
6a0b4824 SF |
603 | /* Windows maps these to the user defined 16 bit Unicode range since they are |
604 | reserved symbols (along with \ and /), otherwise illegal to store | |
605 | in filenames in NTFS */ | |
d0724714 SF |
606 | #define UNI_ASTERIK (__u16) ('*' + 0xF000) |
607 | #define UNI_QUESTION (__u16) ('?' + 0xF000) | |
608 | #define UNI_COLON (__u16) (':' + 0xF000) | |
609 | #define UNI_GRTRTHAN (__u16) ('>' + 0xF000) | |
610 | #define UNI_LESSTHAN (__u16) ('<' + 0xF000) | |
611 | #define UNI_PIPE (__u16) ('|' + 0xF000) | |
612 | #define UNI_SLASH (__u16) ('\\' + 0xF000) | |
6a0b4824 SF |
613 | |
614 | /* Convert 16 bit Unicode pathname from wire format to string in current code | |
615 | page. Conversion may involve remapping up the seven characters that are | |
616 | only legal in POSIX-like OS (if they are present in the string). Path | |
617 | names are little endian 16 bit Unicode on the wire */ | |
618 | int | |
619 | cifs_convertUCSpath(char *target, const __le16 * source, int maxlen, | |
620 | const struct nls_table * cp) | |
621 | { | |
622 | int i,j,len; | |
d0724714 | 623 | __u16 src_char; |
6a0b4824 SF |
624 | |
625 | for(i = 0, j = 0; i < maxlen; i++) { | |
626 | src_char = le16_to_cpu(source[i]); | |
627 | switch (src_char) { | |
628 | case 0: | |
629 | goto cUCS_out; /* BB check this BB */ | |
630 | case UNI_COLON: | |
631 | target[j] = ':'; | |
632 | break; | |
633 | case UNI_ASTERIK: | |
634 | target[j] = '*'; | |
635 | break; | |
636 | case UNI_QUESTION: | |
637 | target[j] = '?'; | |
638 | break; | |
6c91d362 SF |
639 | /* BB We can not handle remapping slash until |
640 | all the calls to build_path_from_dentry | |
641 | are modified, as they use slash as separator BB */ | |
642 | /* case UNI_SLASH: | |
643 | target[j] = '\\'; | |
644 | break;*/ | |
6a0b4824 SF |
645 | case UNI_PIPE: |
646 | target[j] = '|'; | |
647 | break; | |
648 | case UNI_GRTRTHAN: | |
649 | target[j] = '>'; | |
650 | break; | |
651 | case UNI_LESSTHAN: | |
652 | target[j] = '<'; | |
67594feb | 653 | break; |
6a0b4824 SF |
654 | default: |
655 | len = cp->uni2char(src_char, &target[j], | |
656 | NLS_MAX_CHARSET_SIZE); | |
657 | if(len > 0) { | |
658 | j += len; | |
659 | continue; | |
660 | } else { | |
661 | target[j] = '?'; | |
662 | } | |
663 | } | |
664 | j++; | |
57337e42 | 665 | /* make sure we do not overrun callers allocated temp buffer */ |
6a0b4824 SF |
666 | if(j >= (2 * NAME_MAX)) |
667 | break; | |
668 | } | |
669 | cUCS_out: | |
670 | target[j] = 0; | |
671 | return j; | |
672 | } | |
6c91d362 SF |
673 | |
674 | /* Convert 16 bit Unicode pathname to wire format from string in current code | |
675 | page. Conversion may involve remapping up the seven characters that are | |
676 | only legal in POSIX-like OS (if they are present in the string). Path | |
677 | names are little endian 16 bit Unicode on the wire */ | |
678 | int | |
679 | cifsConvertToUCS(__le16 * target, const char *source, int maxlen, | |
680 | const struct nls_table * cp, int mapChars) | |
681 | { | |
682 | int i,j,charlen; | |
683 | int len_remaining = maxlen; | |
684 | char src_char; | |
70ca734a | 685 | __u16 temp; |
6c91d362 SF |
686 | |
687 | if(!mapChars) | |
e89dc920 | 688 | return cifs_strtoUCS(target, source, PATH_MAX, cp); |
6c91d362 SF |
689 | |
690 | for(i = 0, j = 0; i < maxlen; j++) { | |
691 | src_char = source[i]; | |
692 | switch (src_char) { | |
693 | case 0: | |
f4cfd69c | 694 | target[j] = 0; |
6c91d362 SF |
695 | goto ctoUCS_out; |
696 | case ':': | |
697 | target[j] = cpu_to_le16(UNI_COLON); | |
698 | break; | |
699 | case '*': | |
700 | target[j] = cpu_to_le16(UNI_ASTERIK); | |
701 | break; | |
702 | case '?': | |
703 | target[j] = cpu_to_le16(UNI_QUESTION); | |
704 | break; | |
705 | case '<': | |
706 | target[j] = cpu_to_le16(UNI_LESSTHAN); | |
707 | break; | |
708 | case '>': | |
709 | target[j] = cpu_to_le16(UNI_GRTRTHAN); | |
710 | break; | |
711 | case '|': | |
712 | target[j] = cpu_to_le16(UNI_PIPE); | |
713 | break; | |
714 | /* BB We can not handle remapping slash until | |
715 | all the calls to build_path_from_dentry | |
716 | are modified, as they use slash as separator BB */ | |
717 | /* case '\\': | |
718 | target[j] = cpu_to_le16(UNI_SLASH); | |
719 | break;*/ | |
720 | default: | |
721 | charlen = cp->char2uni(source+i, | |
70ca734a | 722 | len_remaining, &temp); |
6c91d362 SF |
723 | /* if no match, use question mark, which |
724 | at least in some cases servers as wild card */ | |
725 | if(charlen < 1) { | |
726 | target[j] = cpu_to_le16(0x003f); | |
727 | charlen = 1; | |
70ca734a SF |
728 | } else |
729 | target[j] = cpu_to_le16(temp); | |
6c91d362 SF |
730 | len_remaining -= charlen; |
731 | /* character may take more than one byte in the | |
732 | the source string, but will take exactly two | |
733 | bytes in the target string */ | |
734 | i+= charlen; | |
735 | continue; | |
736 | } | |
737 | i++; /* move to next char in source string */ | |
738 | len_remaining--; | |
739 | } | |
740 | ||
741 | ctoUCS_out: | |
742 | return i; | |
743 | } |