1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
5 */
6
7 #include <linux/inetdevice.h>
8 #include <net/addrconf.h>
9 #include <linux/syscalls.h>
10 #include <linux/namei.h>
11 #include <linux/statfs.h>
12 #include <linux/ethtool.h>
13 #include <linux/falloc.h>
14 #include <linux/mount.h>
15 #include <linux/filelock.h>
16
17 #include "glob.h"
18 #include "smbfsctl.h"
19 #include "oplock.h"
20 #include "smbacl.h"
21
22 #include "auth.h"
23 #include "asn1.h"
24 #include "connection.h"
25 #include "transport_ipc.h"
26 #include "../common/smbdirect/smbdirect.h"
27 #include "transport_rdma.h"
28 #include "vfs.h"
29 #include "vfs_cache.h"
30 #include "misc.h"
31
32 #include "server.h"
33 #include "smb_common.h"
34 #include "../common/smb2status.h"
35 #include "ksmbd_work.h"
36 #include "mgmt/user_config.h"
37 #include "mgmt/share_config.h"
38 #include "mgmt/tree_connect.h"
39 #include "mgmt/user_session.h"
40 #include "mgmt/ksmbd_ida.h"
41 #include "ndr.h"
42 #include "transport_tcp.h"
43
__wbuf(struct ksmbd_work * work,void ** req,void ** rsp)44 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
45 {
46 if (work->next_smb2_rcv_hdr_off) {
47 *req = ksmbd_req_buf_next(work);
48 *rsp = ksmbd_resp_buf_next(work);
49 } else {
50 *req = smb2_get_msg(work->request_buf);
51 *rsp = smb2_get_msg(work->response_buf);
52 }
53 }
54
55 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
56
57 /**
58 * check_session_id() - check for valid session id in smb header
59 * @conn: connection instance
60 * @id: session id from smb header
61 *
62 * Return: 1 if valid session id, otherwise 0
63 */
check_session_id(struct ksmbd_conn * conn,u64 id)64 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
65 {
66 struct ksmbd_session *sess;
67
68 if (id == 0 || id == -1)
69 return false;
70
71 sess = ksmbd_session_lookup_all(conn, id);
72 if (sess) {
73 ksmbd_user_session_put(sess);
74 return true;
75 }
76 pr_err("Invalid user session id: %llu\n", id);
77 return false;
78 }
79
lookup_chann_list(struct ksmbd_session * sess,struct ksmbd_conn * conn)80 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
81 {
82 return xa_load(&sess->ksmbd_chann_list, (long)conn);
83 }
84
85 /**
86 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
87 * @work: smb work
88 *
89 * Return: 0 if there is a tree connection matched or these are
90 * skipable commands, otherwise error
91 */
smb2_get_ksmbd_tcon(struct ksmbd_work * work)92 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
93 {
94 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
95 unsigned int cmd = le16_to_cpu(req_hdr->Command);
96 unsigned int tree_id;
97
98 if (cmd == SMB2_TREE_CONNECT_HE ||
99 cmd == SMB2_CANCEL_HE ||
100 cmd == SMB2_LOGOFF_HE) {
101 ksmbd_debug(SMB, "skip to check tree connect request\n");
102 return 0;
103 }
104
105 if (xa_empty(&work->sess->tree_conns)) {
106 ksmbd_debug(SMB, "NO tree connected\n");
107 return -ENOENT;
108 }
109
110 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
111
112 /*
113 * If request is not the first in Compound request,
114 * Just validate tree id in header with work->tcon->id.
115 */
116 if (work->next_smb2_rcv_hdr_off) {
117 if (!work->tcon) {
118 pr_err("The first operation in the compound does not have tcon\n");
119 return -EINVAL;
120 }
121 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
122 pr_err("tree id(%u) is different with id(%u) in first operation\n",
123 tree_id, work->tcon->id);
124 return -EINVAL;
125 }
126 return 1;
127 }
128
129 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
130 if (!work->tcon) {
131 pr_err("Invalid tid %d\n", tree_id);
132 return -ENOENT;
133 }
134
135 return 1;
136 }
137
138 /**
139 * smb2_set_err_rsp() - set error response code on smb response
140 * @work: smb work containing response buffer
141 */
smb2_set_err_rsp(struct ksmbd_work * work)142 void smb2_set_err_rsp(struct ksmbd_work *work)
143 {
144 struct smb2_err_rsp *err_rsp;
145
146 if (work->next_smb2_rcv_hdr_off)
147 err_rsp = ksmbd_resp_buf_next(work);
148 else
149 err_rsp = smb2_get_msg(work->response_buf);
150
151 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
152 int err;
153
154 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
155 err_rsp->ErrorContextCount = 0;
156 err_rsp->Reserved = 0;
157 err_rsp->ByteCount = 0;
158 err_rsp->ErrorData[0] = 0;
159 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
160 __SMB2_HEADER_STRUCTURE_SIZE +
161 SMB2_ERROR_STRUCTURE_SIZE2);
162 if (err)
163 work->send_no_response = 1;
164 }
165 }
166
167 /**
168 * is_smb2_neg_cmd() - is it smb2 negotiation command
169 * @work: smb work containing smb header
170 *
171 * Return: true if smb2 negotiation command, otherwise false
172 */
is_smb2_neg_cmd(struct ksmbd_work * work)173 bool is_smb2_neg_cmd(struct ksmbd_work *work)
174 {
175 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
176
177 /* is it SMB2 header ? */
178 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
179 return false;
180
181 /* make sure it is request not response message */
182 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
183 return false;
184
185 if (hdr->Command != SMB2_NEGOTIATE)
186 return false;
187
188 return true;
189 }
190
191 /**
192 * is_smb2_rsp() - is it smb2 response
193 * @work: smb work containing smb response buffer
194 *
195 * Return: true if smb2 response, otherwise false
196 */
is_smb2_rsp(struct ksmbd_work * work)197 bool is_smb2_rsp(struct ksmbd_work *work)
198 {
199 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
200
201 /* is it SMB2 header ? */
202 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
203 return false;
204
205 /* make sure it is response not request message */
206 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
207 return false;
208
209 return true;
210 }
211
212 /**
213 * get_smb2_cmd_val() - get smb command code from smb header
214 * @work: smb work containing smb request buffer
215 *
216 * Return: smb2 request command value
217 */
get_smb2_cmd_val(struct ksmbd_work * work)218 u16 get_smb2_cmd_val(struct ksmbd_work *work)
219 {
220 struct smb2_hdr *rcv_hdr;
221
222 if (work->next_smb2_rcv_hdr_off)
223 rcv_hdr = ksmbd_req_buf_next(work);
224 else
225 rcv_hdr = smb2_get_msg(work->request_buf);
226 return le16_to_cpu(rcv_hdr->Command);
227 }
228
229 /**
230 * set_smb2_rsp_status() - set error response code on smb2 header
231 * @work: smb work containing response buffer
232 * @err: error response code
233 */
set_smb2_rsp_status(struct ksmbd_work * work,__le32 err)234 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
235 {
236 struct smb2_hdr *rsp_hdr;
237
238 rsp_hdr = smb2_get_msg(work->response_buf);
239 rsp_hdr->Status = err;
240
241 work->iov_idx = 0;
242 work->iov_cnt = 0;
243 work->next_smb2_rcv_hdr_off = 0;
244 smb2_set_err_rsp(work);
245 }
246
247 /**
248 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
249 * @work: smb work containing smb request buffer
250 *
251 * smb2 negotiate response is sent in reply of smb1 negotiate command for
252 * dialect auto-negotiation.
253 */
init_smb2_neg_rsp(struct ksmbd_work * work)254 int init_smb2_neg_rsp(struct ksmbd_work *work)
255 {
256 struct smb2_hdr *rsp_hdr;
257 struct smb2_negotiate_rsp *rsp;
258 struct ksmbd_conn *conn = work->conn;
259 int err;
260
261 rsp_hdr = smb2_get_msg(work->response_buf);
262 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
263 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
264 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
265 rsp_hdr->CreditRequest = cpu_to_le16(2);
266 rsp_hdr->Command = SMB2_NEGOTIATE;
267 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
268 rsp_hdr->NextCommand = 0;
269 rsp_hdr->MessageId = 0;
270 rsp_hdr->Id.SyncId.ProcessId = 0;
271 rsp_hdr->Id.SyncId.TreeId = 0;
272 rsp_hdr->SessionId = 0;
273 memset(rsp_hdr->Signature, 0, 16);
274
275 rsp = smb2_get_msg(work->response_buf);
276
277 WARN_ON(ksmbd_conn_good(conn));
278
279 rsp->StructureSize = cpu_to_le16(65);
280 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
281 rsp->DialectRevision = cpu_to_le16(conn->dialect);
282 /* Not setting conn guid rsp->ServerGUID, as it
283 * not used by client for identifying connection
284 */
285 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
286 /* Default Max Message Size till SMB2.0, 64K*/
287 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
288 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
289 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
290
291 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
292 rsp->ServerStartTime = 0;
293
294 rsp->SecurityBufferOffset = cpu_to_le16(128);
295 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
296 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
297 le16_to_cpu(rsp->SecurityBufferOffset));
298 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
299 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
300 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
301 err = ksmbd_iov_pin_rsp(work, rsp,
302 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
303 if (err)
304 return err;
305 conn->use_spnego = true;
306
307 ksmbd_conn_set_need_negotiate(conn);
308 return 0;
309 }
310
311 /**
312 * smb2_set_rsp_credits() - set number of credits in response buffer
313 * @work: smb work containing smb response buffer
314 */
smb2_set_rsp_credits(struct ksmbd_work * work)315 int smb2_set_rsp_credits(struct ksmbd_work *work)
316 {
317 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
318 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
319 struct ksmbd_conn *conn = work->conn;
320 unsigned short credits_requested, aux_max;
321 unsigned short credit_charge, credits_granted = 0;
322
323 if (work->send_no_response)
324 return 0;
325
326 hdr->CreditCharge = req_hdr->CreditCharge;
327
328 if (conn->total_credits > conn->vals->max_credits) {
329 hdr->CreditRequest = 0;
330 pr_err("Total credits overflow: %d\n", conn->total_credits);
331 return -EINVAL;
332 }
333
334 credit_charge = max_t(unsigned short,
335 le16_to_cpu(req_hdr->CreditCharge), 1);
336 if (credit_charge > conn->total_credits) {
337 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
338 credit_charge, conn->total_credits);
339 return -EINVAL;
340 }
341
342 conn->total_credits -= credit_charge;
343 conn->outstanding_credits -= credit_charge;
344 credits_requested = max_t(unsigned short,
345 le16_to_cpu(req_hdr->CreditRequest), 1);
346
347 /* according to smb2.credits smbtorture, Windows server
348 * 2016 or later grant up to 8192 credits at once.
349 *
350 * TODO: Need to adjuct CreditRequest value according to
351 * current cpu load
352 */
353 if (hdr->Command == SMB2_NEGOTIATE)
354 aux_max = 1;
355 else
356 aux_max = conn->vals->max_credits - conn->total_credits;
357 credits_granted = min_t(unsigned short, credits_requested, aux_max);
358
359 conn->total_credits += credits_granted;
360 work->credits_granted += credits_granted;
361
362 if (!req_hdr->NextCommand) {
363 /* Update CreditRequest in last request */
364 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
365 }
366 ksmbd_debug(SMB,
367 "credits: requested[%d] granted[%d] total_granted[%d]\n",
368 credits_requested, credits_granted,
369 conn->total_credits);
370 return 0;
371 }
372
373 /**
374 * init_chained_smb2_rsp() - initialize smb2 chained response
375 * @work: smb work containing smb response buffer
376 */
init_chained_smb2_rsp(struct ksmbd_work * work)377 static void init_chained_smb2_rsp(struct ksmbd_work *work)
378 {
379 struct smb2_hdr *req = ksmbd_req_buf_next(work);
380 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
381 struct smb2_hdr *rsp_hdr;
382 struct smb2_hdr *rcv_hdr;
383 int next_hdr_offset = 0;
384 int len, new_len;
385
386 /* Len of this response = updated RFC len - offset of previous cmd
387 * in the compound rsp
388 */
389
390 /* Storing the current local FID which may be needed by subsequent
391 * command in the compound request
392 */
393 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
394 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
395 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
396 work->compound_sid = le64_to_cpu(rsp->SessionId);
397 }
398
399 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
400 next_hdr_offset = le32_to_cpu(req->NextCommand);
401
402 new_len = ALIGN(len, 8);
403 work->iov[work->iov_idx].iov_len += (new_len - len);
404 inc_rfc1001_len(work->response_buf, new_len - len);
405 rsp->NextCommand = cpu_to_le32(new_len);
406
407 work->next_smb2_rcv_hdr_off += next_hdr_offset;
408 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
409 work->next_smb2_rsp_hdr_off += new_len;
410 ksmbd_debug(SMB,
411 "Compound req new_len = %d rcv off = %d rsp off = %d\n",
412 new_len, work->next_smb2_rcv_hdr_off,
413 work->next_smb2_rsp_hdr_off);
414
415 rsp_hdr = ksmbd_resp_buf_next(work);
416 rcv_hdr = ksmbd_req_buf_next(work);
417
418 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
419 ksmbd_debug(SMB, "related flag should be set\n");
420 work->compound_fid = KSMBD_NO_FID;
421 work->compound_pfid = KSMBD_NO_FID;
422 }
423 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
424 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
425 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
426 rsp_hdr->Command = rcv_hdr->Command;
427
428 /*
429 * Message is response. We don't grant oplock yet.
430 */
431 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
432 SMB2_FLAGS_RELATED_OPERATIONS);
433 rsp_hdr->NextCommand = 0;
434 rsp_hdr->MessageId = rcv_hdr->MessageId;
435 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
436 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
437 rsp_hdr->SessionId = rcv_hdr->SessionId;
438 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
439 }
440
441 /**
442 * is_chained_smb2_message() - check for chained command
443 * @work: smb work containing smb request buffer
444 *
445 * Return: true if chained request, otherwise false
446 */
is_chained_smb2_message(struct ksmbd_work * work)447 bool is_chained_smb2_message(struct ksmbd_work *work)
448 {
449 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
450 unsigned int len, next_cmd;
451
452 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
453 return false;
454
455 hdr = ksmbd_req_buf_next(work);
456 next_cmd = le32_to_cpu(hdr->NextCommand);
457 if (next_cmd > 0) {
458 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
459 __SMB2_HEADER_STRUCTURE_SIZE >
460 get_rfc1002_len(work->request_buf)) {
461 pr_err("next command(%u) offset exceeds smb msg size\n",
462 next_cmd);
463 return false;
464 }
465
466 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
467 work->response_sz) {
468 pr_err("next response offset exceeds response buffer size\n");
469 return false;
470 }
471
472 ksmbd_debug(SMB, "got SMB2 chained command\n");
473 init_chained_smb2_rsp(work);
474 return true;
475 } else if (work->next_smb2_rcv_hdr_off) {
476 /*
477 * This is last request in chained command,
478 * align response to 8 byte
479 */
480 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
481 len = len - get_rfc1002_len(work->response_buf);
482 if (len) {
483 ksmbd_debug(SMB, "padding len %u\n", len);
484 work->iov[work->iov_idx].iov_len += len;
485 inc_rfc1001_len(work->response_buf, len);
486 }
487 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
488 }
489 return false;
490 }
491
492 /**
493 * init_smb2_rsp_hdr() - initialize smb2 response
494 * @work: smb work containing smb request buffer
495 *
496 * Return: 0
497 */
init_smb2_rsp_hdr(struct ksmbd_work * work)498 int init_smb2_rsp_hdr(struct ksmbd_work *work)
499 {
500 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
501 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
502
503 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
504 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
505 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
506 rsp_hdr->Command = rcv_hdr->Command;
507
508 /*
509 * Message is response. We don't grant oplock yet.
510 */
511 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
512 rsp_hdr->NextCommand = 0;
513 rsp_hdr->MessageId = rcv_hdr->MessageId;
514 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
515 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
516 rsp_hdr->SessionId = rcv_hdr->SessionId;
517 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
518
519 return 0;
520 }
521
522 /**
523 * smb2_allocate_rsp_buf() - allocate smb2 response buffer
524 * @work: smb work containing smb request buffer
525 *
526 * Return: 0 on success, otherwise error
527 */
smb2_allocate_rsp_buf(struct ksmbd_work * work)528 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
529 {
530 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
531 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
532 size_t large_sz = small_sz + work->conn->vals->max_trans_size;
533 size_t sz = small_sz;
534 int cmd = le16_to_cpu(hdr->Command);
535
536 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
537 sz = large_sz;
538
539 if (cmd == SMB2_QUERY_INFO_HE) {
540 struct smb2_query_info_req *req;
541
542 if (get_rfc1002_len(work->request_buf) <
543 offsetof(struct smb2_query_info_req, OutputBufferLength))
544 return -EINVAL;
545
546 req = smb2_get_msg(work->request_buf);
547 if ((req->InfoType == SMB2_O_INFO_FILE &&
548 (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
549 req->FileInfoClass == FILE_ALL_INFORMATION)) ||
550 req->InfoType == SMB2_O_INFO_SECURITY)
551 sz = large_sz;
552 }
553
554 /* allocate large response buf for chained commands */
555 if (le32_to_cpu(hdr->NextCommand) > 0)
556 sz = large_sz;
557
558 work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP);
559 if (!work->response_buf)
560 return -ENOMEM;
561
562 work->response_sz = sz;
563 return 0;
564 }
565
566 /**
567 * smb2_check_user_session() - check for valid session for a user
568 * @work: smb work containing smb request buffer
569 *
570 * Return: 0 on success, otherwise error
571 */
smb2_check_user_session(struct ksmbd_work * work)572 int smb2_check_user_session(struct ksmbd_work *work)
573 {
574 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
575 struct ksmbd_conn *conn = work->conn;
576 unsigned int cmd = le16_to_cpu(req_hdr->Command);
577 unsigned long long sess_id;
578
579 /*
580 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
581 * require a session id, so no need to validate user session's for
582 * these commands.
583 */
584 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
585 cmd == SMB2_SESSION_SETUP_HE)
586 return 0;
587
588 if (!ksmbd_conn_good(conn))
589 return -EIO;
590
591 sess_id = le64_to_cpu(req_hdr->SessionId);
592
593 /*
594 * If request is not the first in Compound request,
595 * Just validate session id in header with work->sess->id.
596 */
597 if (work->next_smb2_rcv_hdr_off) {
598 if (!work->sess) {
599 pr_err("The first operation in the compound does not have sess\n");
600 return -EINVAL;
601 }
602 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
603 pr_err("session id(%llu) is different with the first operation(%lld)\n",
604 sess_id, work->sess->id);
605 return -EINVAL;
606 }
607 return 1;
608 }
609
610 /* Check for validity of user session */
611 work->sess = ksmbd_session_lookup_all(conn, sess_id);
612 if (work->sess)
613 return 1;
614 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
615 return -ENOENT;
616 }
617
618 /**
619 * smb2_get_name() - get filename string from on the wire smb format
620 * @src: source buffer
621 * @maxlen: maxlen of source string
622 * @local_nls: nls_table pointer
623 *
624 * Return: matching converted filename on success, otherwise error ptr
625 */
626 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)627 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
628 {
629 char *name;
630
631 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
632 if (IS_ERR(name)) {
633 pr_err("failed to get name %ld\n", PTR_ERR(name));
634 return name;
635 }
636
637 if (*name == '\0') {
638 kfree(name);
639 return ERR_PTR(-EINVAL);
640 }
641
642 if (*name == '\\') {
643 pr_err("not allow directory name included leading slash\n");
644 kfree(name);
645 return ERR_PTR(-EINVAL);
646 }
647
648 ksmbd_conv_path_to_unix(name);
649 ksmbd_strip_last_slash(name);
650 return name;
651 }
652
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)653 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
654 {
655 struct ksmbd_conn *conn = work->conn;
656 int id;
657
658 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
659 if (id < 0) {
660 pr_err("Failed to alloc async message id\n");
661 return id;
662 }
663 work->asynchronous = true;
664 work->async_id = id;
665
666 ksmbd_debug(SMB,
667 "Send interim Response to inform async request id : %d\n",
668 work->async_id);
669
670 work->cancel_fn = fn;
671 work->cancel_argv = arg;
672
673 if (list_empty(&work->async_request_entry)) {
674 spin_lock(&conn->request_lock);
675 list_add_tail(&work->async_request_entry, &conn->async_requests);
676 spin_unlock(&conn->request_lock);
677 }
678
679 return 0;
680 }
681
release_async_work(struct ksmbd_work * work)682 void release_async_work(struct ksmbd_work *work)
683 {
684 struct ksmbd_conn *conn = work->conn;
685
686 spin_lock(&conn->request_lock);
687 list_del_init(&work->async_request_entry);
688 spin_unlock(&conn->request_lock);
689
690 work->asynchronous = 0;
691 work->cancel_fn = NULL;
692 kfree(work->cancel_argv);
693 work->cancel_argv = NULL;
694 if (work->async_id) {
695 ksmbd_release_id(&conn->async_ida, work->async_id);
696 work->async_id = 0;
697 }
698 }
699
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)700 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
701 {
702 struct smb2_hdr *rsp_hdr;
703 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
704
705 if (!in_work)
706 return;
707
708 if (allocate_interim_rsp_buf(in_work)) {
709 pr_err("smb_allocate_rsp_buf failed!\n");
710 ksmbd_free_work_struct(in_work);
711 return;
712 }
713
714 in_work->conn = work->conn;
715 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
716 __SMB2_HEADER_STRUCTURE_SIZE);
717
718 rsp_hdr = smb2_get_msg(in_work->response_buf);
719 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
720 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
721 smb2_set_err_rsp(in_work);
722 rsp_hdr->Status = status;
723
724 ksmbd_conn_write(in_work);
725 ksmbd_free_work_struct(in_work);
726 }
727
smb2_get_reparse_tag_special_file(umode_t mode)728 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
729 {
730 if (S_ISDIR(mode) || S_ISREG(mode))
731 return 0;
732
733 if (S_ISLNK(mode))
734 return IO_REPARSE_TAG_LX_SYMLINK_LE;
735 else if (S_ISFIFO(mode))
736 return IO_REPARSE_TAG_LX_FIFO_LE;
737 else if (S_ISSOCK(mode))
738 return IO_REPARSE_TAG_AF_UNIX_LE;
739 else if (S_ISCHR(mode))
740 return IO_REPARSE_TAG_LX_CHR_LE;
741 else if (S_ISBLK(mode))
742 return IO_REPARSE_TAG_LX_BLK_LE;
743
744 return 0;
745 }
746
747 /**
748 * smb2_get_dos_mode() - get file mode in dos format from unix mode
749 * @stat: kstat containing file mode
750 * @attribute: attribute flags
751 *
752 * Return: converted dos mode
753 */
smb2_get_dos_mode(struct kstat * stat,int attribute)754 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
755 {
756 int attr = 0;
757
758 if (S_ISDIR(stat->mode)) {
759 attr = FILE_ATTRIBUTE_DIRECTORY |
760 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
761 } else {
762 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
763 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
764 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
765 FILE_SUPPORTS_SPARSE_FILES))
766 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
767
768 if (smb2_get_reparse_tag_special_file(stat->mode))
769 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
770 }
771
772 return attr;
773 }
774
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)775 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
776 __le16 hash_id)
777 {
778 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
779 pneg_ctxt->DataLength = cpu_to_le16(38);
780 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
781 pneg_ctxt->Reserved = cpu_to_le32(0);
782 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
783 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
784 pneg_ctxt->HashAlgorithms = hash_id;
785 }
786
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)787 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
788 __le16 cipher_type)
789 {
790 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
791 pneg_ctxt->DataLength = cpu_to_le16(4);
792 pneg_ctxt->Reserved = cpu_to_le32(0);
793 pneg_ctxt->CipherCount = cpu_to_le16(1);
794 pneg_ctxt->Ciphers[0] = cipher_type;
795 }
796
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)797 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
798 __le16 sign_algo)
799 {
800 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
801 pneg_ctxt->DataLength =
802 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
803 - sizeof(struct smb2_neg_context));
804 pneg_ctxt->Reserved = cpu_to_le32(0);
805 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
806 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
807 }
808
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)809 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
810 {
811 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
812 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
813 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
814 pneg_ctxt->Name[0] = 0x93;
815 pneg_ctxt->Name[1] = 0xAD;
816 pneg_ctxt->Name[2] = 0x25;
817 pneg_ctxt->Name[3] = 0x50;
818 pneg_ctxt->Name[4] = 0x9C;
819 pneg_ctxt->Name[5] = 0xB4;
820 pneg_ctxt->Name[6] = 0x11;
821 pneg_ctxt->Name[7] = 0xE7;
822 pneg_ctxt->Name[8] = 0xB4;
823 pneg_ctxt->Name[9] = 0x23;
824 pneg_ctxt->Name[10] = 0x83;
825 pneg_ctxt->Name[11] = 0xDE;
826 pneg_ctxt->Name[12] = 0x96;
827 pneg_ctxt->Name[13] = 0x8B;
828 pneg_ctxt->Name[14] = 0xCD;
829 pneg_ctxt->Name[15] = 0x7C;
830 }
831
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)832 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
833 struct smb2_negotiate_rsp *rsp)
834 {
835 char * const pneg_ctxt = (char *)rsp +
836 le32_to_cpu(rsp->NegotiateContextOffset);
837 int neg_ctxt_cnt = 1;
838 int ctxt_size;
839
840 ksmbd_debug(SMB,
841 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
842 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
843 conn->preauth_info->Preauth_HashId);
844 ctxt_size = sizeof(struct smb2_preauth_neg_context);
845
846 if (conn->cipher_type) {
847 /* Round to 8 byte boundary */
848 ctxt_size = round_up(ctxt_size, 8);
849 ksmbd_debug(SMB,
850 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
851 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
852 (pneg_ctxt + ctxt_size),
853 conn->cipher_type);
854 neg_ctxt_cnt++;
855 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
856 }
857
858 /* compression context not yet supported */
859 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
860
861 if (conn->posix_ext_supported) {
862 ctxt_size = round_up(ctxt_size, 8);
863 ksmbd_debug(SMB,
864 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
865 build_posix_ctxt((struct smb2_posix_neg_context *)
866 (pneg_ctxt + ctxt_size));
867 neg_ctxt_cnt++;
868 ctxt_size += sizeof(struct smb2_posix_neg_context);
869 }
870
871 if (conn->signing_negotiated) {
872 ctxt_size = round_up(ctxt_size, 8);
873 ksmbd_debug(SMB,
874 "assemble SMB2_SIGNING_CAPABILITIES context\n");
875 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
876 (pneg_ctxt + ctxt_size),
877 conn->signing_algorithm);
878 neg_ctxt_cnt++;
879 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
880 }
881
882 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
883 return ctxt_size + AUTH_GSS_PADDING;
884 }
885
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)886 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
887 struct smb2_preauth_neg_context *pneg_ctxt,
888 int ctxt_len)
889 {
890 /*
891 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
892 * which may not be present. Only check for used HashAlgorithms[1].
893 */
894 if (ctxt_len <
895 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
896 return STATUS_INVALID_PARAMETER;
897
898 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
899 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
900
901 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
902 return STATUS_SUCCESS;
903 }
904
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)905 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
906 struct smb2_encryption_neg_context *pneg_ctxt,
907 int ctxt_len)
908 {
909 int cph_cnt;
910 int i, cphs_size;
911
912 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
913 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
914 return;
915 }
916
917 conn->cipher_type = 0;
918
919 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
920 cphs_size = cph_cnt * sizeof(__le16);
921
922 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
923 ctxt_len) {
924 pr_err("Invalid cipher count(%d)\n", cph_cnt);
925 return;
926 }
927
928 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
929 return;
930
931 for (i = 0; i < cph_cnt; i++) {
932 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
933 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
934 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
935 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
936 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
937 pneg_ctxt->Ciphers[i]);
938 conn->cipher_type = pneg_ctxt->Ciphers[i];
939 break;
940 }
941 }
942 }
943
944 /**
945 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
946 * @conn: smb connection
947 *
948 * Return: true if connection should be encrypted, else false
949 */
smb3_encryption_negotiated(struct ksmbd_conn * conn)950 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
951 {
952 if (!conn->ops->generate_encryptionkey)
953 return false;
954
955 /*
956 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
957 * SMB 3.1.1 uses the cipher_type field.
958 */
959 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
960 conn->cipher_type;
961 }
962
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)963 static void decode_compress_ctxt(struct ksmbd_conn *conn,
964 struct smb2_compression_capabilities_context *pneg_ctxt)
965 {
966 conn->compress_algorithm = SMB3_COMPRESS_NONE;
967 }
968
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)969 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
970 struct smb2_signing_capabilities *pneg_ctxt,
971 int ctxt_len)
972 {
973 int sign_algo_cnt;
974 int i, sign_alos_size;
975
976 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
977 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
978 return;
979 }
980
981 conn->signing_negotiated = false;
982 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
983 sign_alos_size = sign_algo_cnt * sizeof(__le16);
984
985 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
986 ctxt_len) {
987 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
988 return;
989 }
990
991 for (i = 0; i < sign_algo_cnt; i++) {
992 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
993 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
994 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
995 pneg_ctxt->SigningAlgorithms[i]);
996 conn->signing_negotiated = true;
997 conn->signing_algorithm =
998 pneg_ctxt->SigningAlgorithms[i];
999 break;
1000 }
1001 }
1002 }
1003
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)1004 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1005 struct smb2_negotiate_req *req,
1006 unsigned int len_of_smb)
1007 {
1008 /* +4 is to account for the RFC1001 len field */
1009 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1010 int i = 0, len_of_ctxts;
1011 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1012 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1013 __le32 status = STATUS_INVALID_PARAMETER;
1014
1015 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1016 if (len_of_smb <= offset) {
1017 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1018 return status;
1019 }
1020
1021 len_of_ctxts = len_of_smb - offset;
1022
1023 while (i++ < neg_ctxt_cnt) {
1024 int clen, ctxt_len;
1025
1026 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1027 break;
1028
1029 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1030 clen = le16_to_cpu(pctx->DataLength);
1031 ctxt_len = clen + sizeof(struct smb2_neg_context);
1032
1033 if (ctxt_len > len_of_ctxts)
1034 break;
1035
1036 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1037 ksmbd_debug(SMB,
1038 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1039 if (conn->preauth_info->Preauth_HashId)
1040 break;
1041
1042 status = decode_preauth_ctxt(conn,
1043 (struct smb2_preauth_neg_context *)pctx,
1044 ctxt_len);
1045 if (status != STATUS_SUCCESS)
1046 break;
1047 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1048 ksmbd_debug(SMB,
1049 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1050 if (conn->cipher_type)
1051 break;
1052
1053 decode_encrypt_ctxt(conn,
1054 (struct smb2_encryption_neg_context *)pctx,
1055 ctxt_len);
1056 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1057 ksmbd_debug(SMB,
1058 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1059 if (conn->compress_algorithm)
1060 break;
1061
1062 decode_compress_ctxt(conn,
1063 (struct smb2_compression_capabilities_context *)pctx);
1064 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1065 ksmbd_debug(SMB,
1066 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1067 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1068 ksmbd_debug(SMB,
1069 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1070 conn->posix_ext_supported = true;
1071 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1072 ksmbd_debug(SMB,
1073 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1074
1075 decode_sign_cap_ctxt(conn,
1076 (struct smb2_signing_capabilities *)pctx,
1077 ctxt_len);
1078 }
1079
1080 /* offsets must be 8 byte aligned */
1081 offset = (ctxt_len + 7) & ~0x7;
1082 len_of_ctxts -= offset;
1083 }
1084 return status;
1085 }
1086
1087 /**
1088 * smb2_handle_negotiate() - handler for smb2 negotiate command
1089 * @work: smb work containing smb request buffer
1090 *
1091 * Return: 0
1092 */
smb2_handle_negotiate(struct ksmbd_work * work)1093 int smb2_handle_negotiate(struct ksmbd_work *work)
1094 {
1095 struct ksmbd_conn *conn = work->conn;
1096 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1097 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1098 int rc = 0;
1099 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1100 __le32 status;
1101
1102 ksmbd_debug(SMB, "Received negotiate request\n");
1103 conn->need_neg = false;
1104 if (ksmbd_conn_good(conn)) {
1105 pr_err("conn->tcp_status is already in CifsGood State\n");
1106 work->send_no_response = 1;
1107 return rc;
1108 }
1109
1110 ksmbd_conn_lock(conn);
1111 smb2_buf_len = get_rfc1002_len(work->request_buf);
1112 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1113 if (smb2_neg_size > smb2_buf_len) {
1114 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115 rc = -EINVAL;
1116 goto err_out;
1117 }
1118
1119 if (req->DialectCount == 0) {
1120 pr_err("malformed packet\n");
1121 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1122 rc = -EINVAL;
1123 goto err_out;
1124 }
1125
1126 if (conn->dialect == SMB311_PROT_ID) {
1127 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1128
1129 if (smb2_buf_len < nego_ctxt_off) {
1130 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1131 rc = -EINVAL;
1132 goto err_out;
1133 }
1134
1135 if (smb2_neg_size > nego_ctxt_off) {
1136 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1137 rc = -EINVAL;
1138 goto err_out;
1139 }
1140
1141 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1142 nego_ctxt_off) {
1143 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1144 rc = -EINVAL;
1145 goto err_out;
1146 }
1147 } else {
1148 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1149 smb2_buf_len) {
1150 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1151 rc = -EINVAL;
1152 goto err_out;
1153 }
1154 }
1155
1156 conn->cli_cap = le32_to_cpu(req->Capabilities);
1157 switch (conn->dialect) {
1158 case SMB311_PROT_ID:
1159 conn->preauth_info =
1160 kzalloc(sizeof(struct preauth_integrity_info),
1161 KSMBD_DEFAULT_GFP);
1162 if (!conn->preauth_info) {
1163 rc = -ENOMEM;
1164 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1165 goto err_out;
1166 }
1167
1168 status = deassemble_neg_contexts(conn, req,
1169 get_rfc1002_len(work->request_buf));
1170 if (status != STATUS_SUCCESS) {
1171 pr_err("deassemble_neg_contexts error(0x%x)\n",
1172 status);
1173 rsp->hdr.Status = status;
1174 rc = -EINVAL;
1175 kfree(conn->preauth_info);
1176 conn->preauth_info = NULL;
1177 goto err_out;
1178 }
1179
1180 rc = init_smb3_11_server(conn);
1181 if (rc < 0) {
1182 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1183 kfree(conn->preauth_info);
1184 conn->preauth_info = NULL;
1185 goto err_out;
1186 }
1187
1188 ksmbd_gen_preauth_integrity_hash(conn,
1189 work->request_buf,
1190 conn->preauth_info->Preauth_HashValue);
1191 rsp->NegotiateContextOffset =
1192 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1193 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1194 break;
1195 case SMB302_PROT_ID:
1196 init_smb3_02_server(conn);
1197 break;
1198 case SMB30_PROT_ID:
1199 init_smb3_0_server(conn);
1200 break;
1201 case SMB21_PROT_ID:
1202 init_smb2_1_server(conn);
1203 break;
1204 case SMB2X_PROT_ID:
1205 case BAD_PROT_ID:
1206 default:
1207 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1208 conn->dialect);
1209 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1210 rc = -EINVAL;
1211 goto err_out;
1212 }
1213 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1214
1215 /* For stats */
1216 conn->connection_type = conn->dialect;
1217
1218 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1219 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1220 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1221
1222 memcpy(conn->ClientGUID, req->ClientGUID,
1223 SMB2_CLIENT_GUID_SIZE);
1224 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1225
1226 rsp->StructureSize = cpu_to_le16(65);
1227 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1228 /* Not setting conn guid rsp->ServerGUID, as it
1229 * not used by client for identifying server
1230 */
1231 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1232
1233 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1234 rsp->ServerStartTime = 0;
1235 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1236 le32_to_cpu(rsp->NegotiateContextOffset),
1237 le16_to_cpu(rsp->NegotiateContextCount));
1238
1239 rsp->SecurityBufferOffset = cpu_to_le16(128);
1240 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1241 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1242 le16_to_cpu(rsp->SecurityBufferOffset));
1243
1244 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1245 conn->use_spnego = true;
1246
1247 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1248 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1249 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1250 conn->sign = true;
1251 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1252 server_conf.enforced_signing = true;
1253 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1254 conn->sign = true;
1255 }
1256
1257 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1258 ksmbd_conn_set_need_setup(conn);
1259
1260 err_out:
1261 ksmbd_conn_unlock(conn);
1262 if (rc)
1263 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264
1265 if (!rc)
1266 rc = ksmbd_iov_pin_rsp(work, rsp,
1267 sizeof(struct smb2_negotiate_rsp) +
1268 AUTH_GSS_LENGTH + neg_ctxt_len);
1269 if (rc < 0)
1270 smb2_set_err_rsp(work);
1271 return rc;
1272 }
1273
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275 struct ksmbd_conn *conn)
1276 {
1277 if (sess->Preauth_HashValue)
1278 return 0;
1279
1280 if (!conn->preauth_info)
1281 return -ENOMEM;
1282
1283 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1284 PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP);
1285 if (!sess->Preauth_HashValue)
1286 return -ENOMEM;
1287
1288 return 0;
1289 }
1290
generate_preauth_hash(struct ksmbd_work * work)1291 static int generate_preauth_hash(struct ksmbd_work *work)
1292 {
1293 struct ksmbd_conn *conn = work->conn;
1294 struct ksmbd_session *sess = work->sess;
1295 u8 *preauth_hash;
1296
1297 if (conn->dialect != SMB311_PROT_ID)
1298 return 0;
1299
1300 if (conn->binding) {
1301 struct preauth_session *preauth_sess;
1302
1303 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1304 if (!preauth_sess) {
1305 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1306 if (!preauth_sess)
1307 return -ENOMEM;
1308 }
1309
1310 preauth_hash = preauth_sess->Preauth_HashValue;
1311 } else {
1312 if (!sess->Preauth_HashValue)
1313 if (alloc_preauth_hash(sess, conn))
1314 return -ENOMEM;
1315 preauth_hash = sess->Preauth_HashValue;
1316 }
1317
1318 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1319 return 0;
1320 }
1321
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1322 static int decode_negotiation_token(struct ksmbd_conn *conn,
1323 struct negotiate_message *negblob,
1324 size_t sz)
1325 {
1326 if (!conn->use_spnego)
1327 return -EINVAL;
1328
1329 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1330 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1331 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1332 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1333 conn->use_spnego = false;
1334 }
1335 }
1336 return 0;
1337 }
1338
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1339 static int ntlm_negotiate(struct ksmbd_work *work,
1340 struct negotiate_message *negblob,
1341 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1342 {
1343 struct challenge_message *chgblob;
1344 unsigned char *spnego_blob = NULL;
1345 u16 spnego_blob_len;
1346 char *neg_blob;
1347 int sz, rc;
1348
1349 ksmbd_debug(SMB, "negotiate phase\n");
1350 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1351 if (rc)
1352 return rc;
1353
1354 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1355 chgblob = (struct challenge_message *)rsp->Buffer;
1356 memset(chgblob, 0, sizeof(struct challenge_message));
1357
1358 if (!work->conn->use_spnego) {
1359 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1360 if (sz < 0)
1361 return -ENOMEM;
1362
1363 rsp->SecurityBufferLength = cpu_to_le16(sz);
1364 return 0;
1365 }
1366
1367 sz = sizeof(struct challenge_message);
1368 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1369
1370 neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP);
1371 if (!neg_blob)
1372 return -ENOMEM;
1373
1374 chgblob = (struct challenge_message *)neg_blob;
1375 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1376 if (sz < 0) {
1377 rc = -ENOMEM;
1378 goto out;
1379 }
1380
1381 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1382 neg_blob, sz);
1383 if (rc) {
1384 rc = -ENOMEM;
1385 goto out;
1386 }
1387
1388 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1389 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1390
1391 out:
1392 kfree(spnego_blob);
1393 kfree(neg_blob);
1394 return rc;
1395 }
1396
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1397 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1398 struct smb2_sess_setup_req *req)
1399 {
1400 int sz;
1401
1402 if (conn->use_spnego && conn->mechToken)
1403 return (struct authenticate_message *)conn->mechToken;
1404
1405 sz = le16_to_cpu(req->SecurityBufferOffset);
1406 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1407 + sz);
1408 }
1409
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1410 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1411 struct smb2_sess_setup_req *req)
1412 {
1413 struct authenticate_message *authblob;
1414 struct ksmbd_user *user;
1415 char *name;
1416 unsigned int name_off, name_len, secbuf_len;
1417
1418 if (conn->use_spnego && conn->mechToken)
1419 secbuf_len = conn->mechTokenLen;
1420 else
1421 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1422 if (secbuf_len < sizeof(struct authenticate_message)) {
1423 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1424 return NULL;
1425 }
1426 authblob = user_authblob(conn, req);
1427 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1428 name_len = le16_to_cpu(authblob->UserName.Length);
1429
1430 if (secbuf_len < (u64)name_off + name_len)
1431 return NULL;
1432
1433 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1434 name_len,
1435 true,
1436 conn->local_nls);
1437 if (IS_ERR(name)) {
1438 pr_err("cannot allocate memory\n");
1439 return NULL;
1440 }
1441
1442 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1443 user = ksmbd_login_user(name);
1444 kfree(name);
1445 return user;
1446 }
1447
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1448 static int ntlm_authenticate(struct ksmbd_work *work,
1449 struct smb2_sess_setup_req *req,
1450 struct smb2_sess_setup_rsp *rsp)
1451 {
1452 struct ksmbd_conn *conn = work->conn;
1453 struct ksmbd_session *sess = work->sess;
1454 struct channel *chann = NULL, *old;
1455 struct ksmbd_user *user;
1456 u64 prev_id;
1457 int sz, rc;
1458
1459 ksmbd_debug(SMB, "authenticate phase\n");
1460 if (conn->use_spnego) {
1461 unsigned char *spnego_blob;
1462 u16 spnego_blob_len;
1463
1464 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1465 &spnego_blob_len,
1466 0);
1467 if (rc)
1468 return -ENOMEM;
1469
1470 memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);
1471 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1472 kfree(spnego_blob);
1473 }
1474
1475 user = session_user(conn, req);
1476 if (!user) {
1477 ksmbd_debug(SMB, "Unknown user name or an error\n");
1478 return -EPERM;
1479 }
1480
1481 /* Check for previous session */
1482 prev_id = le64_to_cpu(req->PreviousSessionId);
1483 if (prev_id && prev_id != sess->id)
1484 destroy_previous_session(conn, user, prev_id);
1485
1486 if (sess->state == SMB2_SESSION_VALID) {
1487 /*
1488 * Reuse session if anonymous try to connect
1489 * on reauthetication.
1490 */
1491 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1492 ksmbd_free_user(user);
1493 return 0;
1494 }
1495
1496 if (!ksmbd_compare_user(sess->user, user)) {
1497 ksmbd_free_user(user);
1498 return -EPERM;
1499 }
1500 ksmbd_free_user(user);
1501 } else {
1502 sess->user = user;
1503 }
1504
1505 if (conn->binding == false && user_guest(sess->user)) {
1506 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1507 } else {
1508 struct authenticate_message *authblob;
1509
1510 authblob = user_authblob(conn, req);
1511 if (conn->use_spnego && conn->mechToken)
1512 sz = conn->mechTokenLen;
1513 else
1514 sz = le16_to_cpu(req->SecurityBufferLength);
1515 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1516 if (rc) {
1517 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1518 ksmbd_debug(SMB, "authentication failed\n");
1519 return -EPERM;
1520 }
1521 }
1522
1523 /*
1524 * If session state is SMB2_SESSION_VALID, We can assume
1525 * that it is reauthentication. And the user/password
1526 * has been verified, so return it here.
1527 */
1528 if (sess->state == SMB2_SESSION_VALID) {
1529 if (conn->binding)
1530 goto binding_session;
1531 return 0;
1532 }
1533
1534 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1535 (conn->sign || server_conf.enforced_signing)) ||
1536 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1537 sess->sign = true;
1538
1539 if (smb3_encryption_negotiated(conn) &&
1540 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1541 rc = conn->ops->generate_encryptionkey(conn, sess);
1542 if (rc) {
1543 ksmbd_debug(SMB,
1544 "SMB3 encryption key generation failed\n");
1545 return -EINVAL;
1546 }
1547 sess->enc = true;
1548 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1549 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1550 /*
1551 * signing is disable if encryption is enable
1552 * on this session
1553 */
1554 sess->sign = false;
1555 }
1556
1557 binding_session:
1558 if (conn->dialect >= SMB30_PROT_ID) {
1559 chann = lookup_chann_list(sess, conn);
1560 if (!chann) {
1561 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1562 if (!chann)
1563 return -ENOMEM;
1564
1565 chann->conn = conn;
1566 old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann,
1567 KSMBD_DEFAULT_GFP);
1568 if (xa_is_err(old)) {
1569 kfree(chann);
1570 return xa_err(old);
1571 }
1572 }
1573 }
1574
1575 if (conn->ops->generate_signingkey) {
1576 rc = conn->ops->generate_signingkey(sess, conn);
1577 if (rc) {
1578 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1579 return -EINVAL;
1580 }
1581 }
1582
1583 if (!ksmbd_conn_lookup_dialect(conn)) {
1584 pr_err("fail to verify the dialect\n");
1585 return -ENOENT;
1586 }
1587 return 0;
1588 }
1589
1590 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1591 static int krb5_authenticate(struct ksmbd_work *work,
1592 struct smb2_sess_setup_req *req,
1593 struct smb2_sess_setup_rsp *rsp)
1594 {
1595 struct ksmbd_conn *conn = work->conn;
1596 struct ksmbd_session *sess = work->sess;
1597 char *in_blob, *out_blob;
1598 struct channel *chann = NULL, *old;
1599 u64 prev_sess_id;
1600 int in_len, out_len;
1601 int retval;
1602
1603 in_blob = (char *)&req->hdr.ProtocolId +
1604 le16_to_cpu(req->SecurityBufferOffset);
1605 in_len = le16_to_cpu(req->SecurityBufferLength);
1606 out_blob = (char *)&rsp->hdr.ProtocolId +
1607 le16_to_cpu(rsp->SecurityBufferOffset);
1608 out_len = work->response_sz -
1609 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1610
1611 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1612 out_blob, &out_len);
1613 if (retval) {
1614 ksmbd_debug(SMB, "krb5 authentication failed\n");
1615 return -EINVAL;
1616 }
1617
1618 /* Check previous session */
1619 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1620 if (prev_sess_id && prev_sess_id != sess->id)
1621 destroy_previous_session(conn, sess->user, prev_sess_id);
1622
1623 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1624
1625 /*
1626 * If session state is SMB2_SESSION_VALID, We can assume
1627 * that it is reauthentication. And the user/password
1628 * has been verified, so return it here.
1629 */
1630 if (sess->state == SMB2_SESSION_VALID) {
1631 if (conn->binding)
1632 goto binding_session;
1633 return 0;
1634 }
1635
1636 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1637 (conn->sign || server_conf.enforced_signing)) ||
1638 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1639 sess->sign = true;
1640
1641 if (smb3_encryption_negotiated(conn) &&
1642 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1643 retval = conn->ops->generate_encryptionkey(conn, sess);
1644 if (retval) {
1645 ksmbd_debug(SMB,
1646 "SMB3 encryption key generation failed\n");
1647 return -EINVAL;
1648 }
1649 sess->enc = true;
1650 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1651 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1652 sess->sign = false;
1653 }
1654
1655 binding_session:
1656 if (conn->dialect >= SMB30_PROT_ID) {
1657 chann = lookup_chann_list(sess, conn);
1658 if (!chann) {
1659 chann = kmalloc(sizeof(struct channel), KSMBD_DEFAULT_GFP);
1660 if (!chann)
1661 return -ENOMEM;
1662
1663 chann->conn = conn;
1664 old = xa_store(&sess->ksmbd_chann_list, (long)conn,
1665 chann, KSMBD_DEFAULT_GFP);
1666 if (xa_is_err(old)) {
1667 kfree(chann);
1668 return xa_err(old);
1669 }
1670 }
1671 }
1672
1673 if (conn->ops->generate_signingkey) {
1674 retval = conn->ops->generate_signingkey(sess, conn);
1675 if (retval) {
1676 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1677 return -EINVAL;
1678 }
1679 }
1680
1681 if (!ksmbd_conn_lookup_dialect(conn)) {
1682 pr_err("fail to verify the dialect\n");
1683 return -ENOENT;
1684 }
1685 return 0;
1686 }
1687 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1688 static int krb5_authenticate(struct ksmbd_work *work,
1689 struct smb2_sess_setup_req *req,
1690 struct smb2_sess_setup_rsp *rsp)
1691 {
1692 return -EOPNOTSUPP;
1693 }
1694 #endif
1695
smb2_sess_setup(struct ksmbd_work * work)1696 int smb2_sess_setup(struct ksmbd_work *work)
1697 {
1698 struct ksmbd_conn *conn = work->conn;
1699 struct smb2_sess_setup_req *req;
1700 struct smb2_sess_setup_rsp *rsp;
1701 struct ksmbd_session *sess;
1702 struct negotiate_message *negblob;
1703 unsigned int negblob_len, negblob_off;
1704 int rc = 0;
1705
1706 ksmbd_debug(SMB, "Received smb2 session setup request\n");
1707
1708 if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) {
1709 work->send_no_response = 1;
1710 return rc;
1711 }
1712
1713 WORK_BUFFERS(work, req, rsp);
1714
1715 rsp->StructureSize = cpu_to_le16(9);
1716 rsp->SessionFlags = 0;
1717 rsp->SecurityBufferOffset = cpu_to_le16(72);
1718 rsp->SecurityBufferLength = 0;
1719
1720 ksmbd_conn_lock(conn);
1721 if (!req->hdr.SessionId) {
1722 sess = ksmbd_smb2_session_create();
1723 if (!sess) {
1724 rc = -ENOMEM;
1725 goto out_err;
1726 }
1727 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1728 rc = ksmbd_session_register(conn, sess);
1729 if (rc)
1730 goto out_err;
1731
1732 conn->binding = false;
1733 } else if (conn->dialect >= SMB30_PROT_ID &&
1734 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1735 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1736 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1737
1738 sess = ksmbd_session_lookup_slowpath(sess_id);
1739 if (!sess) {
1740 rc = -ENOENT;
1741 goto out_err;
1742 }
1743
1744 if (conn->dialect != sess->dialect) {
1745 rc = -EINVAL;
1746 goto out_err;
1747 }
1748
1749 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1750 rc = -EINVAL;
1751 goto out_err;
1752 }
1753
1754 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1755 SMB2_CLIENT_GUID_SIZE)) {
1756 rc = -ENOENT;
1757 goto out_err;
1758 }
1759
1760 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1761 rc = -EACCES;
1762 goto out_err;
1763 }
1764
1765 if (sess->state == SMB2_SESSION_EXPIRED) {
1766 rc = -EFAULT;
1767 goto out_err;
1768 }
1769
1770 if (ksmbd_conn_need_reconnect(conn)) {
1771 rc = -EFAULT;
1772 ksmbd_user_session_put(sess);
1773 sess = NULL;
1774 goto out_err;
1775 }
1776
1777 if (is_ksmbd_session_in_connection(conn, sess_id)) {
1778 rc = -EACCES;
1779 goto out_err;
1780 }
1781
1782 if (user_guest(sess->user)) {
1783 rc = -EOPNOTSUPP;
1784 goto out_err;
1785 }
1786
1787 conn->binding = true;
1788 } else if ((conn->dialect < SMB30_PROT_ID ||
1789 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1790 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1791 sess = NULL;
1792 rc = -EACCES;
1793 goto out_err;
1794 } else {
1795 sess = ksmbd_session_lookup(conn,
1796 le64_to_cpu(req->hdr.SessionId));
1797 if (!sess) {
1798 rc = -ENOENT;
1799 goto out_err;
1800 }
1801
1802 if (sess->state == SMB2_SESSION_EXPIRED) {
1803 rc = -EFAULT;
1804 goto out_err;
1805 }
1806
1807 if (ksmbd_conn_need_reconnect(conn)) {
1808 rc = -EFAULT;
1809 ksmbd_user_session_put(sess);
1810 sess = NULL;
1811 goto out_err;
1812 }
1813
1814 conn->binding = false;
1815 }
1816 work->sess = sess;
1817
1818 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1819 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1820 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1821 rc = -EINVAL;
1822 goto out_err;
1823 }
1824
1825 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1826 negblob_off);
1827
1828 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1829 if (conn->mechToken) {
1830 negblob = (struct negotiate_message *)conn->mechToken;
1831 negblob_len = conn->mechTokenLen;
1832 }
1833 }
1834
1835 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1836 rc = -EINVAL;
1837 goto out_err;
1838 }
1839
1840 if (server_conf.auth_mechs & conn->auth_mechs) {
1841 rc = generate_preauth_hash(work);
1842 if (rc)
1843 goto out_err;
1844
1845 if (conn->preferred_auth_mech &
1846 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1847 rc = krb5_authenticate(work, req, rsp);
1848 if (rc) {
1849 rc = -EINVAL;
1850 goto out_err;
1851 }
1852
1853 if (!ksmbd_conn_need_reconnect(conn)) {
1854 ksmbd_conn_set_good(conn);
1855 sess->state = SMB2_SESSION_VALID;
1856 }
1857 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1858 if (negblob->MessageType == NtLmNegotiate) {
1859 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1860 if (rc)
1861 goto out_err;
1862 rsp->hdr.Status =
1863 STATUS_MORE_PROCESSING_REQUIRED;
1864 } else if (negblob->MessageType == NtLmAuthenticate) {
1865 rc = ntlm_authenticate(work, req, rsp);
1866 if (rc)
1867 goto out_err;
1868
1869 if (!ksmbd_conn_need_reconnect(conn)) {
1870 ksmbd_conn_set_good(conn);
1871 sess->state = SMB2_SESSION_VALID;
1872 }
1873 if (conn->binding) {
1874 struct preauth_session *preauth_sess;
1875
1876 preauth_sess =
1877 ksmbd_preauth_session_lookup(conn, sess->id);
1878 if (preauth_sess) {
1879 list_del(&preauth_sess->preauth_entry);
1880 kfree(preauth_sess);
1881 }
1882 }
1883 } else {
1884 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1885 le32_to_cpu(negblob->MessageType));
1886 rc = -EINVAL;
1887 }
1888 } else {
1889 /* TODO: need one more negotiation */
1890 pr_err("Not support the preferred authentication\n");
1891 rc = -EINVAL;
1892 }
1893 } else {
1894 pr_err("Not support authentication\n");
1895 rc = -EINVAL;
1896 }
1897
1898 out_err:
1899 if (rc == -EINVAL)
1900 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1901 else if (rc == -ENOENT)
1902 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1903 else if (rc == -EACCES)
1904 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1905 else if (rc == -EFAULT)
1906 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1907 else if (rc == -ENOMEM)
1908 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1909 else if (rc == -EOPNOTSUPP)
1910 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1911 else if (rc)
1912 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1913
1914 if (conn->use_spnego && conn->mechToken) {
1915 kfree(conn->mechToken);
1916 conn->mechToken = NULL;
1917 }
1918
1919 if (rc < 0) {
1920 /*
1921 * SecurityBufferOffset should be set to zero
1922 * in session setup error response.
1923 */
1924 rsp->SecurityBufferOffset = 0;
1925
1926 if (sess) {
1927 bool try_delay = false;
1928
1929 /*
1930 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1931 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1932 * failure to make it harder to send enough random connection requests
1933 * to break into a server.
1934 */
1935 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1936 try_delay = true;
1937
1938 sess->last_active = jiffies;
1939 sess->state = SMB2_SESSION_EXPIRED;
1940 ksmbd_user_session_put(sess);
1941 work->sess = NULL;
1942 if (try_delay) {
1943 ksmbd_conn_set_need_reconnect(conn);
1944 ssleep(5);
1945 ksmbd_conn_set_need_setup(conn);
1946 }
1947 }
1948 smb2_set_err_rsp(work);
1949 } else {
1950 unsigned int iov_len;
1951
1952 if (rsp->SecurityBufferLength)
1953 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1954 le16_to_cpu(rsp->SecurityBufferLength);
1955 else
1956 iov_len = sizeof(struct smb2_sess_setup_rsp);
1957 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1958 if (rc)
1959 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1960 }
1961
1962 ksmbd_conn_unlock(conn);
1963 return rc;
1964 }
1965
1966 /**
1967 * smb2_tree_connect() - handler for smb2 tree connect command
1968 * @work: smb work containing smb request buffer
1969 *
1970 * Return: 0 on success, otherwise error
1971 */
smb2_tree_connect(struct ksmbd_work * work)1972 int smb2_tree_connect(struct ksmbd_work *work)
1973 {
1974 struct ksmbd_conn *conn = work->conn;
1975 struct smb2_tree_connect_req *req;
1976 struct smb2_tree_connect_rsp *rsp;
1977 struct ksmbd_session *sess = work->sess;
1978 char *treename = NULL, *name = NULL;
1979 struct ksmbd_tree_conn_status status;
1980 struct ksmbd_share_config *share = NULL;
1981 int rc = -EINVAL;
1982
1983 ksmbd_debug(SMB, "Received smb2 tree connect request\n");
1984
1985 WORK_BUFFERS(work, req, rsp);
1986
1987 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1988 le16_to_cpu(req->PathLength), true,
1989 conn->local_nls);
1990 if (IS_ERR(treename)) {
1991 pr_err("treename is NULL\n");
1992 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1993 goto out_err1;
1994 }
1995
1996 name = ksmbd_extract_sharename(conn->um, treename);
1997 if (IS_ERR(name)) {
1998 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1999 goto out_err1;
2000 }
2001
2002 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
2003 name, treename);
2004
2005 status = ksmbd_tree_conn_connect(work, name);
2006 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
2007 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
2008 else
2009 goto out_err1;
2010
2011 share = status.tree_conn->share_conf;
2012 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2013 ksmbd_debug(SMB, "IPC share path request\n");
2014 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
2015 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
2016 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
2017 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
2018 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
2019 FILE_SYNCHRONIZE_LE;
2020 } else {
2021 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
2022 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
2023 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
2024 if (test_tree_conn_flag(status.tree_conn,
2025 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2026 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
2027 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
2028 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
2029 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
2030 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
2031 FILE_SYNCHRONIZE_LE;
2032 }
2033 }
2034
2035 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2036 if (conn->posix_ext_supported)
2037 status.tree_conn->posix_extensions = true;
2038
2039 write_lock(&sess->tree_conns_lock);
2040 status.tree_conn->t_state = TREE_CONNECTED;
2041 write_unlock(&sess->tree_conns_lock);
2042 rsp->StructureSize = cpu_to_le16(16);
2043 out_err1:
2044 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
2045 test_share_config_flag(share,
2046 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2047 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2048 else
2049 rsp->Capabilities = 0;
2050 rsp->Reserved = 0;
2051 /* default manual caching */
2052 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2053
2054 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2055 if (rc)
2056 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2057
2058 if (!IS_ERR(treename))
2059 kfree(treename);
2060 if (!IS_ERR(name))
2061 kfree(name);
2062
2063 switch (status.ret) {
2064 case KSMBD_TREE_CONN_STATUS_OK:
2065 rsp->hdr.Status = STATUS_SUCCESS;
2066 rc = 0;
2067 break;
2068 case -ESTALE:
2069 case -ENOENT:
2070 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2071 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2072 break;
2073 case -ENOMEM:
2074 case KSMBD_TREE_CONN_STATUS_NOMEM:
2075 rsp->hdr.Status = STATUS_NO_MEMORY;
2076 break;
2077 case KSMBD_TREE_CONN_STATUS_ERROR:
2078 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2079 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2080 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2081 break;
2082 case -EINVAL:
2083 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2084 break;
2085 default:
2086 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2087 }
2088
2089 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2090 smb2_set_err_rsp(work);
2091
2092 return rc;
2093 }
2094
2095 /**
2096 * smb2_create_open_flags() - convert smb open flags to unix open flags
2097 * @file_present: is file already present
2098 * @access: file access flags
2099 * @disposition: file disposition flags
2100 * @may_flags: set with MAY_ flags
2101 * @coptions: file creation options
2102 * @mode: file mode
2103 *
2104 * Return: file open flags
2105 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags,__le32 coptions,umode_t mode)2106 static int smb2_create_open_flags(bool file_present, __le32 access,
2107 __le32 disposition,
2108 int *may_flags,
2109 __le32 coptions,
2110 umode_t mode)
2111 {
2112 int oflags = O_NONBLOCK | O_LARGEFILE;
2113
2114 if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {
2115 access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2116 ksmbd_debug(SMB, "Discard write access to a directory\n");
2117 }
2118
2119 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2120 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2121 oflags |= O_RDWR;
2122 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2123 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2124 oflags |= O_WRONLY;
2125 *may_flags = MAY_OPEN | MAY_WRITE;
2126 } else {
2127 oflags |= O_RDONLY;
2128 *may_flags = MAY_OPEN | MAY_READ;
2129 }
2130
2131 if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))
2132 oflags |= O_PATH;
2133
2134 if (file_present) {
2135 switch (disposition & FILE_CREATE_MASK_LE) {
2136 case FILE_OPEN_LE:
2137 case FILE_CREATE_LE:
2138 break;
2139 case FILE_SUPERSEDE_LE:
2140 case FILE_OVERWRITE_LE:
2141 case FILE_OVERWRITE_IF_LE:
2142 oflags |= O_TRUNC;
2143 break;
2144 default:
2145 break;
2146 }
2147 } else {
2148 switch (disposition & FILE_CREATE_MASK_LE) {
2149 case FILE_SUPERSEDE_LE:
2150 case FILE_CREATE_LE:
2151 case FILE_OPEN_IF_LE:
2152 case FILE_OVERWRITE_IF_LE:
2153 oflags |= O_CREAT;
2154 break;
2155 case FILE_OPEN_LE:
2156 case FILE_OVERWRITE_LE:
2157 oflags &= ~O_CREAT;
2158 break;
2159 default:
2160 break;
2161 }
2162 }
2163
2164 return oflags;
2165 }
2166
2167 /**
2168 * smb2_tree_disconnect() - handler for smb tree connect request
2169 * @work: smb work containing request buffer
2170 *
2171 * Return: 0
2172 */
smb2_tree_disconnect(struct ksmbd_work * work)2173 int smb2_tree_disconnect(struct ksmbd_work *work)
2174 {
2175 struct smb2_tree_disconnect_rsp *rsp;
2176 struct smb2_tree_disconnect_req *req;
2177 struct ksmbd_session *sess = work->sess;
2178 struct ksmbd_tree_connect *tcon = work->tcon;
2179 int err;
2180
2181 ksmbd_debug(SMB, "Received smb2 tree disconnect request\n");
2182
2183 WORK_BUFFERS(work, req, rsp);
2184
2185 if (!tcon) {
2186 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2187
2188 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2189 err = -ENOENT;
2190 goto err_out;
2191 }
2192
2193 ksmbd_close_tree_conn_fds(work);
2194
2195 write_lock(&sess->tree_conns_lock);
2196 if (tcon->t_state == TREE_DISCONNECTED) {
2197 write_unlock(&sess->tree_conns_lock);
2198 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2199 err = -ENOENT;
2200 goto err_out;
2201 }
2202
2203 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2204 tcon->t_state = TREE_DISCONNECTED;
2205 write_unlock(&sess->tree_conns_lock);
2206
2207 err = ksmbd_tree_conn_disconnect(sess, tcon);
2208 if (err) {
2209 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2210 goto err_out;
2211 }
2212
2213 work->tcon = NULL;
2214
2215 rsp->StructureSize = cpu_to_le16(4);
2216 err = ksmbd_iov_pin_rsp(work, rsp,
2217 sizeof(struct smb2_tree_disconnect_rsp));
2218 if (err) {
2219 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2220 goto err_out;
2221 }
2222
2223 return 0;
2224
2225 err_out:
2226 smb2_set_err_rsp(work);
2227 return err;
2228
2229 }
2230
2231 /**
2232 * smb2_session_logoff() - handler for session log off request
2233 * @work: smb work containing request buffer
2234 *
2235 * Return: 0
2236 */
smb2_session_logoff(struct ksmbd_work * work)2237 int smb2_session_logoff(struct ksmbd_work *work)
2238 {
2239 struct ksmbd_conn *conn = work->conn;
2240 struct ksmbd_session *sess = work->sess;
2241 struct smb2_logoff_req *req;
2242 struct smb2_logoff_rsp *rsp;
2243 u64 sess_id;
2244 int err;
2245
2246 WORK_BUFFERS(work, req, rsp);
2247
2248 ksmbd_debug(SMB, "Received smb2 session logoff request\n");
2249
2250 ksmbd_conn_lock(conn);
2251 if (!ksmbd_conn_good(conn)) {
2252 ksmbd_conn_unlock(conn);
2253 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2254 smb2_set_err_rsp(work);
2255 return -ENOENT;
2256 }
2257 sess_id = le64_to_cpu(req->hdr.SessionId);
2258 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2259 ksmbd_conn_unlock(conn);
2260
2261 ksmbd_close_session_fds(work);
2262 ksmbd_conn_wait_idle(conn);
2263
2264 if (ksmbd_tree_conn_session_logoff(sess)) {
2265 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2266 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2267 smb2_set_err_rsp(work);
2268 return -ENOENT;
2269 }
2270
2271 down_write(&conn->session_lock);
2272 sess->state = SMB2_SESSION_EXPIRED;
2273 up_write(&conn->session_lock);
2274
2275 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_SETUP);
2276
2277 rsp->StructureSize = cpu_to_le16(4);
2278 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2279 if (err) {
2280 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2281 smb2_set_err_rsp(work);
2282 return err;
2283 }
2284 return 0;
2285 }
2286
2287 /**
2288 * create_smb2_pipe() - create IPC pipe
2289 * @work: smb work containing request buffer
2290 *
2291 * Return: 0 on success, otherwise error
2292 */
create_smb2_pipe(struct ksmbd_work * work)2293 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2294 {
2295 struct smb2_create_rsp *rsp;
2296 struct smb2_create_req *req;
2297 int id;
2298 int err;
2299 char *name;
2300
2301 WORK_BUFFERS(work, req, rsp);
2302
2303 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2304 1, work->conn->local_nls);
2305 if (IS_ERR(name)) {
2306 rsp->hdr.Status = STATUS_NO_MEMORY;
2307 err = PTR_ERR(name);
2308 goto out;
2309 }
2310
2311 id = ksmbd_session_rpc_open(work->sess, name);
2312 if (id < 0) {
2313 pr_err("Unable to open RPC pipe: %d\n", id);
2314 err = id;
2315 goto out;
2316 }
2317
2318 rsp->hdr.Status = STATUS_SUCCESS;
2319 rsp->StructureSize = cpu_to_le16(89);
2320 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2321 rsp->Flags = 0;
2322 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2323
2324 rsp->CreationTime = cpu_to_le64(0);
2325 rsp->LastAccessTime = cpu_to_le64(0);
2326 rsp->ChangeTime = cpu_to_le64(0);
2327 rsp->AllocationSize = cpu_to_le64(0);
2328 rsp->EndofFile = cpu_to_le64(0);
2329 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2330 rsp->Reserved2 = 0;
2331 rsp->VolatileFileId = id;
2332 rsp->PersistentFileId = 0;
2333 rsp->CreateContextsOffset = 0;
2334 rsp->CreateContextsLength = 0;
2335
2336 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2337 if (err)
2338 goto out;
2339
2340 kfree(name);
2341 return 0;
2342
2343 out:
2344 switch (err) {
2345 case -EINVAL:
2346 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2347 break;
2348 case -ENOSPC:
2349 case -ENOMEM:
2350 rsp->hdr.Status = STATUS_NO_MEMORY;
2351 break;
2352 }
2353
2354 if (!IS_ERR(name))
2355 kfree(name);
2356
2357 smb2_set_err_rsp(work);
2358 return err;
2359 }
2360
2361 /**
2362 * smb2_set_ea() - handler for setting extended attributes using set
2363 * info command
2364 * @eabuf: set info command buffer
2365 * @buf_len: set info command buffer length
2366 * @path: dentry path for get ea
2367 * @get_write: get write access to a mount
2368 *
2369 * Return: 0 on success, otherwise error
2370 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2371 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2372 const struct path *path, bool get_write)
2373 {
2374 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2375 char *attr_name = NULL, *value;
2376 int rc = 0;
2377 unsigned int next = 0;
2378
2379 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2380 le16_to_cpu(eabuf->EaValueLength))
2381 return -EINVAL;
2382
2383 attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP);
2384 if (!attr_name)
2385 return -ENOMEM;
2386
2387 do {
2388 if (!eabuf->EaNameLength)
2389 goto next;
2390
2391 ksmbd_debug(SMB,
2392 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2393 eabuf->name, eabuf->EaNameLength,
2394 le16_to_cpu(eabuf->EaValueLength),
2395 le32_to_cpu(eabuf->NextEntryOffset));
2396
2397 if (eabuf->EaNameLength >
2398 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2399 rc = -EINVAL;
2400 break;
2401 }
2402
2403 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2404 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2405 eabuf->EaNameLength);
2406 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2407 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2408
2409 if (!eabuf->EaValueLength) {
2410 rc = ksmbd_vfs_casexattr_len(idmap,
2411 path->dentry,
2412 attr_name,
2413 XATTR_USER_PREFIX_LEN +
2414 eabuf->EaNameLength);
2415
2416 /* delete the EA only when it exits */
2417 if (rc > 0) {
2418 rc = ksmbd_vfs_remove_xattr(idmap,
2419 path,
2420 attr_name,
2421 get_write);
2422
2423 if (rc < 0) {
2424 ksmbd_debug(SMB,
2425 "remove xattr failed(%d)\n",
2426 rc);
2427 break;
2428 }
2429 }
2430
2431 /* if the EA doesn't exist, just do nothing. */
2432 rc = 0;
2433 } else {
2434 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2435 le16_to_cpu(eabuf->EaValueLength),
2436 0, get_write);
2437 if (rc < 0) {
2438 ksmbd_debug(SMB,
2439 "ksmbd_vfs_setxattr is failed(%d)\n",
2440 rc);
2441 break;
2442 }
2443 }
2444
2445 next:
2446 next = le32_to_cpu(eabuf->NextEntryOffset);
2447 if (next == 0 || buf_len < next)
2448 break;
2449 buf_len -= next;
2450 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2451 if (buf_len < sizeof(struct smb2_ea_info)) {
2452 rc = -EINVAL;
2453 break;
2454 }
2455
2456 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2457 le16_to_cpu(eabuf->EaValueLength)) {
2458 rc = -EINVAL;
2459 break;
2460 }
2461 } while (next != 0);
2462
2463 kfree(attr_name);
2464 return rc;
2465 }
2466
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2467 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2468 struct ksmbd_file *fp,
2469 char *stream_name, int s_type)
2470 {
2471 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2472 size_t xattr_stream_size;
2473 char *xattr_stream_name;
2474 int rc;
2475
2476 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2477 &xattr_stream_name,
2478 &xattr_stream_size,
2479 s_type);
2480 if (rc)
2481 return rc;
2482
2483 fp->stream.name = xattr_stream_name;
2484 fp->stream.size = xattr_stream_size;
2485
2486 /* Check if there is stream prefix in xattr space */
2487 rc = ksmbd_vfs_casexattr_len(idmap,
2488 path->dentry,
2489 xattr_stream_name,
2490 xattr_stream_size);
2491 if (rc >= 0)
2492 return 0;
2493
2494 if (fp->cdoption == FILE_OPEN_LE) {
2495 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2496 return -EBADF;
2497 }
2498
2499 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2500 if (rc < 0)
2501 pr_err("Failed to store XATTR stream name :%d\n", rc);
2502 return 0;
2503 }
2504
smb2_remove_smb_xattrs(const struct path * path)2505 static int smb2_remove_smb_xattrs(const struct path *path)
2506 {
2507 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2508 char *name, *xattr_list = NULL;
2509 ssize_t xattr_list_len;
2510 int err = 0;
2511
2512 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2513 if (xattr_list_len < 0) {
2514 goto out;
2515 } else if (!xattr_list_len) {
2516 ksmbd_debug(SMB, "empty xattr in the file\n");
2517 goto out;
2518 }
2519
2520 for (name = xattr_list; name - xattr_list < xattr_list_len;
2521 name += strlen(name) + 1) {
2522 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2523
2524 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2525 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2526 STREAM_PREFIX_LEN)) {
2527 err = ksmbd_vfs_remove_xattr(idmap, path,
2528 name, true);
2529 if (err)
2530 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2531 name);
2532 }
2533 }
2534 out:
2535 kvfree(xattr_list);
2536 return err;
2537 }
2538
smb2_create_truncate(const struct path * path)2539 static int smb2_create_truncate(const struct path *path)
2540 {
2541 int rc = vfs_truncate(path, 0);
2542
2543 if (rc) {
2544 pr_err("vfs_truncate failed, rc %d\n", rc);
2545 return rc;
2546 }
2547
2548 rc = smb2_remove_smb_xattrs(path);
2549 if (rc == -EOPNOTSUPP)
2550 rc = 0;
2551 if (rc)
2552 ksmbd_debug(SMB,
2553 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2554 rc);
2555 return rc;
2556 }
2557
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2558 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2559 struct ksmbd_file *fp)
2560 {
2561 struct xattr_dos_attrib da = {0};
2562 int rc;
2563
2564 if (!test_share_config_flag(tcon->share_conf,
2565 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2566 return;
2567
2568 da.version = 4;
2569 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2570 da.itime = da.create_time = fp->create_time;
2571 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2572 XATTR_DOSINFO_ITIME;
2573
2574 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2575 if (rc)
2576 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2577 }
2578
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2579 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2580 const struct path *path, struct ksmbd_file *fp)
2581 {
2582 struct xattr_dos_attrib da;
2583 int rc;
2584
2585 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2586
2587 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2588 if (!test_share_config_flag(tcon->share_conf,
2589 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2590 return;
2591
2592 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2593 path->dentry, &da);
2594 if (rc > 0) {
2595 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2596 fp->create_time = da.create_time;
2597 fp->itime = da.itime;
2598 }
2599 }
2600
smb2_creat(struct ksmbd_work * work,struct path * path,char * name,int open_flags,umode_t posix_mode,bool is_dir)2601 static int smb2_creat(struct ksmbd_work *work,
2602 struct path *path, char *name, int open_flags,
2603 umode_t posix_mode, bool is_dir)
2604 {
2605 struct ksmbd_tree_connect *tcon = work->tcon;
2606 struct ksmbd_share_config *share = tcon->share_conf;
2607 umode_t mode;
2608 int rc;
2609
2610 if (!(open_flags & O_CREAT))
2611 return -EBADF;
2612
2613 ksmbd_debug(SMB, "file does not exist, so creating\n");
2614 if (is_dir == true) {
2615 ksmbd_debug(SMB, "creating directory\n");
2616
2617 mode = share_config_directory_mode(share, posix_mode);
2618 rc = ksmbd_vfs_mkdir(work, name, mode);
2619 if (rc)
2620 return rc;
2621 } else {
2622 ksmbd_debug(SMB, "creating regular file\n");
2623
2624 mode = share_config_create_mode(share, posix_mode);
2625 rc = ksmbd_vfs_create(work, name, mode);
2626 if (rc)
2627 return rc;
2628 }
2629
2630 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2631 if (rc) {
2632 pr_err("cannot get linux path (%s), err = %d\n",
2633 name, rc);
2634 return rc;
2635 }
2636 return 0;
2637 }
2638
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2639 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2640 struct smb2_create_req *req,
2641 const struct path *path)
2642 {
2643 struct create_context *context;
2644 struct create_sd_buf_req *sd_buf;
2645
2646 if (!req->CreateContextsOffset)
2647 return -ENOENT;
2648
2649 /* Parse SD BUFFER create contexts */
2650 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2651 if (!context)
2652 return -ENOENT;
2653 else if (IS_ERR(context))
2654 return PTR_ERR(context);
2655
2656 ksmbd_debug(SMB,
2657 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2658 sd_buf = (struct create_sd_buf_req *)context;
2659 if (le16_to_cpu(context->DataOffset) +
2660 le32_to_cpu(context->DataLength) <
2661 sizeof(struct create_sd_buf_req))
2662 return -EINVAL;
2663 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2664 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2665 }
2666
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2667 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2668 struct mnt_idmap *idmap,
2669 struct inode *inode)
2670 {
2671 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2672 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2673
2674 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2675 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2676 fattr->cf_mode = inode->i_mode;
2677 fattr->cf_acls = NULL;
2678 fattr->cf_dacls = NULL;
2679
2680 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2681 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2682 if (S_ISDIR(inode->i_mode))
2683 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2684 }
2685 }
2686
2687 enum {
2688 DURABLE_RECONN_V2 = 1,
2689 DURABLE_RECONN,
2690 DURABLE_REQ_V2,
2691 DURABLE_REQ,
2692 };
2693
2694 struct durable_info {
2695 struct ksmbd_file *fp;
2696 unsigned short int type;
2697 bool persistent;
2698 bool reconnected;
2699 unsigned int timeout;
2700 char *CreateGuid;
2701 };
2702
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2703 static int parse_durable_handle_context(struct ksmbd_work *work,
2704 struct smb2_create_req *req,
2705 struct lease_ctx_info *lc,
2706 struct durable_info *dh_info)
2707 {
2708 struct ksmbd_conn *conn = work->conn;
2709 struct create_context *context;
2710 int dh_idx, err = 0;
2711 u64 persistent_id = 0;
2712 int req_op_level;
2713 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2714
2715 req_op_level = req->RequestedOplockLevel;
2716 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2717 dh_idx++) {
2718 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2719 if (IS_ERR(context)) {
2720 err = PTR_ERR(context);
2721 goto out;
2722 }
2723 if (!context)
2724 continue;
2725
2726 switch (dh_idx) {
2727 case DURABLE_RECONN_V2:
2728 {
2729 struct create_durable_reconn_v2_req *recon_v2;
2730
2731 if (dh_info->type == DURABLE_RECONN ||
2732 dh_info->type == DURABLE_REQ_V2) {
2733 err = -EINVAL;
2734 goto out;
2735 }
2736
2737 if (le16_to_cpu(context->DataOffset) +
2738 le32_to_cpu(context->DataLength) <
2739 sizeof(struct create_durable_reconn_v2_req)) {
2740 err = -EINVAL;
2741 goto out;
2742 }
2743
2744 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2745 persistent_id = recon_v2->Fid.PersistentFileId;
2746 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2747 if (!dh_info->fp) {
2748 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2749 err = -EBADF;
2750 goto out;
2751 }
2752
2753 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2754 SMB2_CREATE_GUID_SIZE)) {
2755 err = -EBADF;
2756 ksmbd_put_durable_fd(dh_info->fp);
2757 goto out;
2758 }
2759
2760 dh_info->type = dh_idx;
2761 dh_info->reconnected = true;
2762 ksmbd_debug(SMB,
2763 "reconnect v2 Persistent-id from reconnect = %llu\n",
2764 persistent_id);
2765 break;
2766 }
2767 case DURABLE_RECONN:
2768 {
2769 struct create_durable_reconn_req *recon;
2770
2771 if (dh_info->type == DURABLE_RECONN_V2 ||
2772 dh_info->type == DURABLE_REQ_V2) {
2773 err = -EINVAL;
2774 goto out;
2775 }
2776
2777 if (le16_to_cpu(context->DataOffset) +
2778 le32_to_cpu(context->DataLength) <
2779 sizeof(struct create_durable_reconn_req)) {
2780 err = -EINVAL;
2781 goto out;
2782 }
2783
2784 recon = (struct create_durable_reconn_req *)context;
2785 persistent_id = recon->Data.Fid.PersistentFileId;
2786 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2787 if (!dh_info->fp) {
2788 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2789 err = -EBADF;
2790 goto out;
2791 }
2792
2793 dh_info->type = dh_idx;
2794 dh_info->reconnected = true;
2795 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2796 persistent_id);
2797 break;
2798 }
2799 case DURABLE_REQ_V2:
2800 {
2801 struct create_durable_req_v2 *durable_v2_blob;
2802
2803 if (dh_info->type == DURABLE_RECONN ||
2804 dh_info->type == DURABLE_RECONN_V2) {
2805 err = -EINVAL;
2806 goto out;
2807 }
2808
2809 if (le16_to_cpu(context->DataOffset) +
2810 le32_to_cpu(context->DataLength) <
2811 sizeof(struct create_durable_req_v2)) {
2812 err = -EINVAL;
2813 goto out;
2814 }
2815
2816 durable_v2_blob =
2817 (struct create_durable_req_v2 *)context;
2818 ksmbd_debug(SMB, "Request for durable v2 open\n");
2819 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2820 if (dh_info->fp) {
2821 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2822 SMB2_CLIENT_GUID_SIZE)) {
2823 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2824 err = -ENOEXEC;
2825 goto out;
2826 }
2827
2828 dh_info->fp->conn = conn;
2829 dh_info->reconnected = true;
2830 goto out;
2831 }
2832 }
2833
2834 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2835 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2836 dh_info->CreateGuid =
2837 durable_v2_blob->CreateGuid;
2838 dh_info->persistent =
2839 le32_to_cpu(durable_v2_blob->Flags);
2840 dh_info->timeout =
2841 le32_to_cpu(durable_v2_blob->Timeout);
2842 dh_info->type = dh_idx;
2843 }
2844 break;
2845 }
2846 case DURABLE_REQ:
2847 if (dh_info->type == DURABLE_RECONN)
2848 goto out;
2849 if (dh_info->type == DURABLE_RECONN_V2 ||
2850 dh_info->type == DURABLE_REQ_V2) {
2851 err = -EINVAL;
2852 goto out;
2853 }
2854
2855 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2856 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2857 ksmbd_debug(SMB, "Request for durable open\n");
2858 dh_info->type = dh_idx;
2859 }
2860 }
2861 }
2862
2863 out:
2864 return err;
2865 }
2866
2867 /**
2868 * smb2_open() - handler for smb file open request
2869 * @work: smb work containing request buffer
2870 *
2871 * Return: 0 on success, otherwise error
2872 */
smb2_open(struct ksmbd_work * work)2873 int smb2_open(struct ksmbd_work *work)
2874 {
2875 struct ksmbd_conn *conn = work->conn;
2876 struct ksmbd_session *sess = work->sess;
2877 struct ksmbd_tree_connect *tcon = work->tcon;
2878 struct smb2_create_req *req;
2879 struct smb2_create_rsp *rsp;
2880 struct path path;
2881 struct ksmbd_share_config *share = tcon->share_conf;
2882 struct ksmbd_file *fp = NULL;
2883 struct file *filp = NULL;
2884 struct mnt_idmap *idmap = NULL;
2885 struct kstat stat;
2886 struct create_context *context;
2887 struct lease_ctx_info *lc = NULL;
2888 struct create_ea_buf_req *ea_buf = NULL;
2889 struct oplock_info *opinfo;
2890 struct durable_info dh_info = {0};
2891 __le32 *next_ptr = NULL;
2892 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2893 int rc = 0;
2894 int contxt_cnt = 0, query_disk_id = 0;
2895 bool maximal_access_ctxt = false, posix_ctxt = false;
2896 int s_type = 0;
2897 int next_off = 0;
2898 char *name = NULL;
2899 char *stream_name = NULL;
2900 bool file_present = false, created = false, already_permitted = false;
2901 int share_ret, need_truncate = 0;
2902 u64 time;
2903 umode_t posix_mode = 0;
2904 __le32 daccess, maximal_access = 0;
2905 int iov_len = 0;
2906
2907 ksmbd_debug(SMB, "Received smb2 create request\n");
2908
2909 WORK_BUFFERS(work, req, rsp);
2910
2911 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2912 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2913 ksmbd_debug(SMB, "invalid flag in chained command\n");
2914 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2915 smb2_set_err_rsp(work);
2916 return -EINVAL;
2917 }
2918
2919 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2920 ksmbd_debug(SMB, "IPC pipe create request\n");
2921 return create_smb2_pipe(work);
2922 }
2923
2924 if (req->CreateContextsOffset && tcon->posix_extensions) {
2925 context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16);
2926 if (IS_ERR(context)) {
2927 rc = PTR_ERR(context);
2928 goto err_out2;
2929 } else if (context) {
2930 struct create_posix *posix = (struct create_posix *)context;
2931
2932 if (le16_to_cpu(context->DataOffset) +
2933 le32_to_cpu(context->DataLength) <
2934 sizeof(struct create_posix) - 4) {
2935 rc = -EINVAL;
2936 goto err_out2;
2937 }
2938 ksmbd_debug(SMB, "get posix context\n");
2939
2940 posix_mode = le32_to_cpu(posix->Mode);
2941 posix_ctxt = true;
2942 }
2943 }
2944
2945 if (req->NameLength) {
2946 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2947 le16_to_cpu(req->NameLength),
2948 work->conn->local_nls);
2949 if (IS_ERR(name)) {
2950 rc = PTR_ERR(name);
2951 name = NULL;
2952 goto err_out2;
2953 }
2954
2955 ksmbd_debug(SMB, "converted name = %s\n", name);
2956
2957 if (posix_ctxt == false) {
2958 if (strchr(name, ':')) {
2959 if (!test_share_config_flag(work->tcon->share_conf,
2960 KSMBD_SHARE_FLAG_STREAMS)) {
2961 rc = -EBADF;
2962 goto err_out2;
2963 }
2964 rc = parse_stream_name(name, &stream_name, &s_type);
2965 if (rc < 0)
2966 goto err_out2;
2967 }
2968
2969 rc = ksmbd_validate_filename(name);
2970 if (rc < 0)
2971 goto err_out2;
2972 }
2973
2974 if (ksmbd_share_veto_filename(share, name)) {
2975 rc = -ENOENT;
2976 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2977 name);
2978 goto err_out2;
2979 }
2980 } else {
2981 name = kstrdup("", KSMBD_DEFAULT_GFP);
2982 if (!name) {
2983 rc = -ENOMEM;
2984 goto err_out2;
2985 }
2986 }
2987
2988 req_op_level = req->RequestedOplockLevel;
2989
2990 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2991 req->CreateContextsOffset) {
2992 lc = parse_lease_state(req);
2993 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2994 if (rc) {
2995 ksmbd_debug(SMB, "error parsing durable handle context\n");
2996 goto err_out2;
2997 }
2998
2999 if (dh_info.reconnected == true) {
3000 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
3001 if (rc) {
3002 ksmbd_put_durable_fd(dh_info.fp);
3003 goto err_out2;
3004 }
3005
3006 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
3007 if (rc) {
3008 ksmbd_put_durable_fd(dh_info.fp);
3009 goto err_out2;
3010 }
3011
3012 if (ksmbd_override_fsids(work)) {
3013 rc = -ENOMEM;
3014 ksmbd_put_durable_fd(dh_info.fp);
3015 goto err_out2;
3016 }
3017
3018 fp = dh_info.fp;
3019 file_info = FILE_OPENED;
3020
3021 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
3022 if (rc)
3023 goto err_out2;
3024
3025 ksmbd_put_durable_fd(fp);
3026 goto reconnected_fp;
3027 }
3028 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3029 lc = parse_lease_state(req);
3030
3031 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
3032 pr_err("Invalid impersonationlevel : 0x%x\n",
3033 le32_to_cpu(req->ImpersonationLevel));
3034 rc = -EIO;
3035 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
3036 goto err_out2;
3037 }
3038
3039 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
3040 pr_err("Invalid create options : 0x%x\n",
3041 le32_to_cpu(req->CreateOptions));
3042 rc = -EINVAL;
3043 goto err_out2;
3044 } else {
3045 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
3046 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
3047 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
3048
3049 if (req->CreateOptions &
3050 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
3051 FILE_RESERVE_OPFILTER_LE)) {
3052 rc = -EOPNOTSUPP;
3053 goto err_out2;
3054 }
3055
3056 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3057 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
3058 rc = -EINVAL;
3059 goto err_out2;
3060 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
3061 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
3062 }
3063 }
3064 }
3065
3066 if (le32_to_cpu(req->CreateDisposition) >
3067 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
3068 pr_err("Invalid create disposition : 0x%x\n",
3069 le32_to_cpu(req->CreateDisposition));
3070 rc = -EINVAL;
3071 goto err_out2;
3072 }
3073
3074 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
3075 pr_err("Invalid desired access : 0x%x\n",
3076 le32_to_cpu(req->DesiredAccess));
3077 rc = -EACCES;
3078 goto err_out2;
3079 }
3080
3081 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
3082 pr_err("Invalid file attribute : 0x%x\n",
3083 le32_to_cpu(req->FileAttributes));
3084 rc = -EINVAL;
3085 goto err_out2;
3086 }
3087
3088 if (req->CreateContextsOffset) {
3089 /* Parse non-durable handle create contexts */
3090 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3091 if (IS_ERR(context)) {
3092 rc = PTR_ERR(context);
3093 goto err_out2;
3094 } else if (context) {
3095 ea_buf = (struct create_ea_buf_req *)context;
3096 if (le16_to_cpu(context->DataOffset) +
3097 le32_to_cpu(context->DataLength) <
3098 sizeof(struct create_ea_buf_req)) {
3099 rc = -EINVAL;
3100 goto err_out2;
3101 }
3102 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3103 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3104 rc = -EACCES;
3105 goto err_out2;
3106 }
3107 }
3108
3109 context = smb2_find_context_vals(req,
3110 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3111 if (IS_ERR(context)) {
3112 rc = PTR_ERR(context);
3113 goto err_out2;
3114 } else if (context) {
3115 ksmbd_debug(SMB,
3116 "get query maximal access context\n");
3117 maximal_access_ctxt = 1;
3118 }
3119
3120 context = smb2_find_context_vals(req,
3121 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3122 if (IS_ERR(context)) {
3123 rc = PTR_ERR(context);
3124 goto err_out2;
3125 } else if (context) {
3126 ksmbd_debug(SMB, "get timewarp context\n");
3127 rc = -EBADF;
3128 goto err_out2;
3129 }
3130 }
3131
3132 if (ksmbd_override_fsids(work)) {
3133 rc = -ENOMEM;
3134 goto err_out2;
3135 }
3136
3137 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS,
3138 &path, 1);
3139 if (!rc) {
3140 file_present = true;
3141
3142 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3143 /*
3144 * If file exists with under flags, return access
3145 * denied error.
3146 */
3147 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3148 req->CreateDisposition == FILE_OPEN_IF_LE) {
3149 rc = -EACCES;
3150 goto err_out;
3151 }
3152
3153 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3154 ksmbd_debug(SMB,
3155 "User does not have write permission\n");
3156 rc = -EACCES;
3157 goto err_out;
3158 }
3159 } else if (d_is_symlink(path.dentry)) {
3160 rc = -EACCES;
3161 goto err_out;
3162 }
3163
3164 idmap = mnt_idmap(path.mnt);
3165 } else {
3166 if (rc != -ENOENT)
3167 goto err_out;
3168 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3169 name, rc);
3170 rc = 0;
3171 }
3172
3173 if (stream_name) {
3174 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3175 if (s_type == DATA_STREAM) {
3176 rc = -EIO;
3177 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3178 }
3179 } else {
3180 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3181 s_type == DATA_STREAM) {
3182 rc = -EIO;
3183 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3184 }
3185 }
3186
3187 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3188 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3189 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3190 rc = -EIO;
3191 }
3192
3193 if (rc < 0)
3194 goto err_out;
3195 }
3196
3197 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3198 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3199 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3200 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3201 name, req->CreateOptions);
3202 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3203 rc = -EIO;
3204 goto err_out;
3205 }
3206
3207 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3208 !(req->CreateDisposition == FILE_CREATE_LE) &&
3209 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3210 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3211 rc = -EIO;
3212 goto err_out;
3213 }
3214
3215 if (!stream_name && file_present &&
3216 req->CreateDisposition == FILE_CREATE_LE) {
3217 rc = -EEXIST;
3218 goto err_out;
3219 }
3220
3221 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3222
3223 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3224 rc = smb_check_perm_dacl(conn, &path, &daccess,
3225 sess->user->uid);
3226 if (rc)
3227 goto err_out;
3228 }
3229
3230 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3231 if (!file_present) {
3232 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3233 } else {
3234 ksmbd_vfs_query_maximal_access(idmap,
3235 path.dentry,
3236 &daccess);
3237 already_permitted = true;
3238 }
3239 maximal_access = daccess;
3240 }
3241
3242 open_flags = smb2_create_open_flags(file_present, daccess,
3243 req->CreateDisposition,
3244 &may_flags,
3245 req->CreateOptions,
3246 file_present ? d_inode(path.dentry)->i_mode : 0);
3247
3248 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3249 if (open_flags & (O_CREAT | O_TRUNC)) {
3250 ksmbd_debug(SMB,
3251 "User does not have write permission\n");
3252 rc = -EACCES;
3253 goto err_out;
3254 }
3255 }
3256
3257 /*create file if not present */
3258 if (!file_present) {
3259 rc = smb2_creat(work, &path, name, open_flags,
3260 posix_mode,
3261 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3262 if (rc) {
3263 if (rc == -ENOENT) {
3264 rc = -EIO;
3265 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3266 }
3267 goto err_out;
3268 }
3269
3270 created = true;
3271 idmap = mnt_idmap(path.mnt);
3272 if (ea_buf) {
3273 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3274 sizeof(struct smb2_ea_info)) {
3275 rc = -EINVAL;
3276 goto err_out;
3277 }
3278
3279 rc = smb2_set_ea(&ea_buf->ea,
3280 le32_to_cpu(ea_buf->ccontext.DataLength),
3281 &path, false);
3282 if (rc == -EOPNOTSUPP)
3283 rc = 0;
3284 else if (rc)
3285 goto err_out;
3286 }
3287 } else if (!already_permitted) {
3288 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3289 * because execute(search) permission on a parent directory,
3290 * is already granted.
3291 */
3292 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3293 rc = inode_permission(idmap,
3294 d_inode(path.dentry),
3295 may_flags);
3296 if (rc)
3297 goto err_out;
3298
3299 if ((daccess & FILE_DELETE_LE) ||
3300 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3301 rc = inode_permission(idmap,
3302 d_inode(path.dentry->d_parent),
3303 MAY_EXEC | MAY_WRITE);
3304 if (rc)
3305 goto err_out;
3306 }
3307 }
3308 }
3309
3310 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3311 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3312 rc = -EBUSY;
3313 goto err_out;
3314 }
3315
3316 rc = 0;
3317 filp = dentry_open(&path, open_flags, current_cred());
3318 if (IS_ERR(filp)) {
3319 rc = PTR_ERR(filp);
3320 pr_err("dentry open for dir failed, rc %d\n", rc);
3321 goto err_out;
3322 }
3323
3324 if (file_present) {
3325 if (!(open_flags & O_TRUNC))
3326 file_info = FILE_OPENED;
3327 else
3328 file_info = FILE_OVERWRITTEN;
3329
3330 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3331 FILE_SUPERSEDE_LE)
3332 file_info = FILE_SUPERSEDED;
3333 } else if (open_flags & O_CREAT) {
3334 file_info = FILE_CREATED;
3335 }
3336
3337 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3338
3339 /* Obtain Volatile-ID */
3340 fp = ksmbd_open_fd(work, filp);
3341 if (IS_ERR(fp)) {
3342 fput(filp);
3343 rc = PTR_ERR(fp);
3344 fp = NULL;
3345 goto err_out;
3346 }
3347
3348 /* Get Persistent-ID */
3349 ksmbd_open_durable_fd(fp);
3350 if (!has_file_id(fp->persistent_id)) {
3351 rc = -ENOMEM;
3352 goto err_out;
3353 }
3354
3355 fp->cdoption = req->CreateDisposition;
3356 fp->daccess = daccess;
3357 fp->saccess = req->ShareAccess;
3358 fp->coption = req->CreateOptions;
3359
3360 /* Set default windows and posix acls if creating new file */
3361 if (created) {
3362 int posix_acl_rc;
3363 struct inode *inode = d_inode(path.dentry);
3364
3365 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3366 &path,
3367 d_inode(path.dentry->d_parent));
3368 if (posix_acl_rc)
3369 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3370
3371 if (test_share_config_flag(work->tcon->share_conf,
3372 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3373 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3374 sess->user->gid);
3375 }
3376
3377 if (rc) {
3378 rc = smb2_create_sd_buffer(work, req, &path);
3379 if (rc) {
3380 if (posix_acl_rc)
3381 ksmbd_vfs_set_init_posix_acl(idmap,
3382 &path);
3383
3384 if (test_share_config_flag(work->tcon->share_conf,
3385 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3386 struct smb_fattr fattr;
3387 struct smb_ntsd *pntsd;
3388 int pntsd_size, ace_num = 0;
3389
3390 ksmbd_acls_fattr(&fattr, idmap, inode);
3391 if (fattr.cf_acls)
3392 ace_num = fattr.cf_acls->a_count;
3393 if (fattr.cf_dacls)
3394 ace_num += fattr.cf_dacls->a_count;
3395
3396 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3397 sizeof(struct smb_sid) * 3 +
3398 sizeof(struct smb_acl) +
3399 sizeof(struct smb_ace) * ace_num * 2,
3400 KSMBD_DEFAULT_GFP);
3401 if (!pntsd) {
3402 posix_acl_release(fattr.cf_acls);
3403 posix_acl_release(fattr.cf_dacls);
3404 goto err_out;
3405 }
3406
3407 rc = build_sec_desc(idmap,
3408 pntsd, NULL, 0,
3409 OWNER_SECINFO |
3410 GROUP_SECINFO |
3411 DACL_SECINFO,
3412 &pntsd_size, &fattr);
3413 posix_acl_release(fattr.cf_acls);
3414 posix_acl_release(fattr.cf_dacls);
3415 if (rc) {
3416 kfree(pntsd);
3417 goto err_out;
3418 }
3419
3420 rc = ksmbd_vfs_set_sd_xattr(conn,
3421 idmap,
3422 &path,
3423 pntsd,
3424 pntsd_size,
3425 false);
3426 kfree(pntsd);
3427 if (rc)
3428 pr_err("failed to store ntacl in xattr : %d\n",
3429 rc);
3430 }
3431 }
3432 }
3433 rc = 0;
3434 }
3435
3436 if (stream_name) {
3437 rc = smb2_set_stream_name_xattr(&path,
3438 fp,
3439 stream_name,
3440 s_type);
3441 if (rc)
3442 goto err_out;
3443 file_info = FILE_CREATED;
3444 }
3445
3446 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3447 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3448
3449 fp->is_posix_ctxt = posix_ctxt;
3450
3451 /* fp should be searchable through ksmbd_inode.m_fp_list
3452 * after daccess, saccess, attrib_only, and stream are
3453 * initialized.
3454 */
3455 down_write(&fp->f_ci->m_lock);
3456 list_add(&fp->node, &fp->f_ci->m_fp_list);
3457 up_write(&fp->f_ci->m_lock);
3458
3459 /* Check delete pending among previous fp before oplock break */
3460 if (ksmbd_inode_pending_delete(fp)) {
3461 rc = -EBUSY;
3462 goto err_out;
3463 }
3464
3465 if (file_present || created)
3466 path_put(&path);
3467
3468 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3469 !fp->attrib_only && !stream_name) {
3470 smb_break_all_oplock(work, fp);
3471 need_truncate = 1;
3472 }
3473
3474 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3475 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3476 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3477 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3478 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3479 rc = share_ret;
3480 goto err_out1;
3481 }
3482 } else {
3483 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3484 if (S_ISDIR(file_inode(filp)->i_mode)) {
3485 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3486 lc->is_dir = true;
3487 }
3488
3489 /*
3490 * Compare parent lease using parent key. If there is no
3491 * a lease that has same parent key, Send lease break
3492 * notification.
3493 */
3494 smb_send_parent_lease_break_noti(fp, lc);
3495
3496 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3497 ksmbd_debug(SMB,
3498 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3499 name, req_op_level, lc->req_state);
3500 rc = find_same_lease_key(sess, fp->f_ci, lc);
3501 if (rc)
3502 goto err_out1;
3503 } else if (open_flags == O_RDONLY &&
3504 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3505 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3506 req_op_level = SMB2_OPLOCK_LEVEL_II;
3507
3508 rc = smb_grant_oplock(work, req_op_level,
3509 fp->persistent_id, fp,
3510 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3511 lc, share_ret);
3512 if (rc < 0)
3513 goto err_out1;
3514 }
3515
3516 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3517 ksmbd_fd_set_delete_on_close(fp, file_info);
3518
3519 if (need_truncate) {
3520 rc = smb2_create_truncate(&fp->filp->f_path);
3521 if (rc)
3522 goto err_out1;
3523 }
3524
3525 if (req->CreateContextsOffset) {
3526 struct create_alloc_size_req *az_req;
3527
3528 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3529 SMB2_CREATE_ALLOCATION_SIZE, 4);
3530 if (IS_ERR(az_req)) {
3531 rc = PTR_ERR(az_req);
3532 goto err_out1;
3533 } else if (az_req) {
3534 loff_t alloc_size;
3535 int err;
3536
3537 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3538 le32_to_cpu(az_req->ccontext.DataLength) <
3539 sizeof(struct create_alloc_size_req)) {
3540 rc = -EINVAL;
3541 goto err_out1;
3542 }
3543 alloc_size = le64_to_cpu(az_req->AllocationSize);
3544 ksmbd_debug(SMB,
3545 "request smb2 create allocate size : %llu\n",
3546 alloc_size);
3547 smb_break_all_levII_oplock(work, fp, 1);
3548 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3549 alloc_size);
3550 if (err < 0)
3551 ksmbd_debug(SMB,
3552 "vfs_fallocate is failed : %d\n",
3553 err);
3554 }
3555
3556 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3557 if (IS_ERR(context)) {
3558 rc = PTR_ERR(context);
3559 goto err_out1;
3560 } else if (context) {
3561 ksmbd_debug(SMB, "get query on disk id context\n");
3562 query_disk_id = 1;
3563 }
3564
3565 if (conn->is_aapl == false) {
3566 context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4);
3567 if (IS_ERR(context)) {
3568 rc = PTR_ERR(context);
3569 goto err_out1;
3570 } else if (context)
3571 conn->is_aapl = true;
3572 }
3573 }
3574
3575 rc = ksmbd_vfs_getattr(&path, &stat);
3576 if (rc)
3577 goto err_out1;
3578
3579 if (stat.result_mask & STATX_BTIME)
3580 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3581 else
3582 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3583 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3584 fp->f_ci->m_fattr =
3585 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3586
3587 if (!created)
3588 smb2_update_xattrs(tcon, &path, fp);
3589 else
3590 smb2_new_xattrs(tcon, &path, fp);
3591
3592 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3593
3594 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3595 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3596 test_share_config_flag(work->tcon->share_conf,
3597 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3598 fp->is_persistent = true;
3599 else
3600 fp->is_durable = true;
3601
3602 if (dh_info.type == DURABLE_REQ_V2) {
3603 memcpy(fp->create_guid, dh_info.CreateGuid,
3604 SMB2_CREATE_GUID_SIZE);
3605 if (dh_info.timeout)
3606 fp->durable_timeout =
3607 min_t(unsigned int, dh_info.timeout,
3608 DURABLE_HANDLE_MAX_TIMEOUT);
3609 else
3610 fp->durable_timeout = 60;
3611 }
3612 }
3613
3614 reconnected_fp:
3615 rsp->StructureSize = cpu_to_le16(89);
3616 rcu_read_lock();
3617 opinfo = rcu_dereference(fp->f_opinfo);
3618 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3619 rcu_read_unlock();
3620 rsp->Flags = 0;
3621 rsp->CreateAction = cpu_to_le32(file_info);
3622 rsp->CreationTime = cpu_to_le64(fp->create_time);
3623 time = ksmbd_UnixTimeToNT(stat.atime);
3624 rsp->LastAccessTime = cpu_to_le64(time);
3625 time = ksmbd_UnixTimeToNT(stat.mtime);
3626 rsp->LastWriteTime = cpu_to_le64(time);
3627 time = ksmbd_UnixTimeToNT(stat.ctime);
3628 rsp->ChangeTime = cpu_to_le64(time);
3629 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3630 cpu_to_le64(stat.blocks << 9);
3631 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3632 rsp->FileAttributes = fp->f_ci->m_fattr;
3633
3634 rsp->Reserved2 = 0;
3635
3636 rsp->PersistentFileId = fp->persistent_id;
3637 rsp->VolatileFileId = fp->volatile_id;
3638
3639 rsp->CreateContextsOffset = 0;
3640 rsp->CreateContextsLength = 0;
3641 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3642
3643 /* If lease is request send lease context response */
3644 if (opinfo && opinfo->is_lease) {
3645 struct create_context *lease_ccontext;
3646
3647 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3648 name, opinfo->o_lease->state);
3649 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3650
3651 lease_ccontext = (struct create_context *)rsp->Buffer;
3652 contxt_cnt++;
3653 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3654 le32_add_cpu(&rsp->CreateContextsLength,
3655 conn->vals->create_lease_size);
3656 iov_len += conn->vals->create_lease_size;
3657 next_ptr = &lease_ccontext->Next;
3658 next_off = conn->vals->create_lease_size;
3659 }
3660
3661 if (maximal_access_ctxt) {
3662 struct create_context *mxac_ccontext;
3663
3664 if (maximal_access == 0)
3665 ksmbd_vfs_query_maximal_access(idmap,
3666 path.dentry,
3667 &maximal_access);
3668 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3669 le32_to_cpu(rsp->CreateContextsLength));
3670 contxt_cnt++;
3671 create_mxac_rsp_buf(rsp->Buffer +
3672 le32_to_cpu(rsp->CreateContextsLength),
3673 le32_to_cpu(maximal_access));
3674 le32_add_cpu(&rsp->CreateContextsLength,
3675 conn->vals->create_mxac_size);
3676 iov_len += conn->vals->create_mxac_size;
3677 if (next_ptr)
3678 *next_ptr = cpu_to_le32(next_off);
3679 next_ptr = &mxac_ccontext->Next;
3680 next_off = conn->vals->create_mxac_size;
3681 }
3682
3683 if (query_disk_id) {
3684 struct create_context *disk_id_ccontext;
3685
3686 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3687 le32_to_cpu(rsp->CreateContextsLength));
3688 contxt_cnt++;
3689 create_disk_id_rsp_buf(rsp->Buffer +
3690 le32_to_cpu(rsp->CreateContextsLength),
3691 stat.ino, tcon->id);
3692 le32_add_cpu(&rsp->CreateContextsLength,
3693 conn->vals->create_disk_id_size);
3694 iov_len += conn->vals->create_disk_id_size;
3695 if (next_ptr)
3696 *next_ptr = cpu_to_le32(next_off);
3697 next_ptr = &disk_id_ccontext->Next;
3698 next_off = conn->vals->create_disk_id_size;
3699 }
3700
3701 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3702 struct create_context *durable_ccontext;
3703
3704 durable_ccontext = (struct create_context *)(rsp->Buffer +
3705 le32_to_cpu(rsp->CreateContextsLength));
3706 contxt_cnt++;
3707 if (dh_info.type == DURABLE_REQ) {
3708 create_durable_rsp_buf(rsp->Buffer +
3709 le32_to_cpu(rsp->CreateContextsLength));
3710 le32_add_cpu(&rsp->CreateContextsLength,
3711 conn->vals->create_durable_size);
3712 iov_len += conn->vals->create_durable_size;
3713 } else {
3714 create_durable_v2_rsp_buf(rsp->Buffer +
3715 le32_to_cpu(rsp->CreateContextsLength),
3716 fp);
3717 le32_add_cpu(&rsp->CreateContextsLength,
3718 conn->vals->create_durable_v2_size);
3719 iov_len += conn->vals->create_durable_v2_size;
3720 }
3721
3722 if (next_ptr)
3723 *next_ptr = cpu_to_le32(next_off);
3724 next_ptr = &durable_ccontext->Next;
3725 next_off = conn->vals->create_durable_size;
3726 }
3727
3728 if (posix_ctxt) {
3729 contxt_cnt++;
3730 create_posix_rsp_buf(rsp->Buffer +
3731 le32_to_cpu(rsp->CreateContextsLength),
3732 fp);
3733 le32_add_cpu(&rsp->CreateContextsLength,
3734 conn->vals->create_posix_size);
3735 iov_len += conn->vals->create_posix_size;
3736 if (next_ptr)
3737 *next_ptr = cpu_to_le32(next_off);
3738 }
3739
3740 if (contxt_cnt > 0) {
3741 rsp->CreateContextsOffset =
3742 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3743 }
3744
3745 err_out:
3746 if (rc && (file_present || created))
3747 path_put(&path);
3748
3749 err_out1:
3750 ksmbd_revert_fsids(work);
3751
3752 err_out2:
3753 if (!rc) {
3754 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3755 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3756 }
3757 if (rc) {
3758 if (rc == -EINVAL)
3759 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3760 else if (rc == -EOPNOTSUPP)
3761 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3762 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3763 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3764 else if (rc == -ENOENT)
3765 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3766 else if (rc == -EPERM)
3767 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3768 else if (rc == -EBUSY)
3769 rsp->hdr.Status = STATUS_DELETE_PENDING;
3770 else if (rc == -EBADF)
3771 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3772 else if (rc == -ENOEXEC)
3773 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3774 else if (rc == -ENXIO)
3775 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3776 else if (rc == -EEXIST)
3777 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3778 else if (rc == -EMFILE)
3779 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3780 if (!rsp->hdr.Status)
3781 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3782
3783 if (fp)
3784 ksmbd_fd_put(work, fp);
3785 smb2_set_err_rsp(work);
3786 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3787 }
3788
3789 kfree(name);
3790 kfree(lc);
3791
3792 return rc;
3793 }
3794
readdir_info_level_struct_sz(int info_level)3795 static int readdir_info_level_struct_sz(int info_level)
3796 {
3797 switch (info_level) {
3798 case FILE_FULL_DIRECTORY_INFORMATION:
3799 return sizeof(struct file_full_directory_info);
3800 case FILE_BOTH_DIRECTORY_INFORMATION:
3801 return sizeof(struct file_both_directory_info);
3802 case FILE_DIRECTORY_INFORMATION:
3803 return sizeof(struct file_directory_info);
3804 case FILE_NAMES_INFORMATION:
3805 return sizeof(struct file_names_info);
3806 case FILEID_FULL_DIRECTORY_INFORMATION:
3807 return sizeof(struct file_id_full_dir_info);
3808 case FILEID_BOTH_DIRECTORY_INFORMATION:
3809 return sizeof(struct file_id_both_directory_info);
3810 case SMB_FIND_FILE_POSIX_INFO:
3811 return sizeof(struct smb2_posix_info);
3812 default:
3813 return -EOPNOTSUPP;
3814 }
3815 }
3816
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3817 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3818 {
3819 switch (info_level) {
3820 case FILE_FULL_DIRECTORY_INFORMATION:
3821 {
3822 struct file_full_directory_info *ffdinfo;
3823
3824 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3825 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3826 d_info->name = ffdinfo->FileName;
3827 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3828 return 0;
3829 }
3830 case FILE_BOTH_DIRECTORY_INFORMATION:
3831 {
3832 struct file_both_directory_info *fbdinfo;
3833
3834 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3835 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3836 d_info->name = fbdinfo->FileName;
3837 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3838 return 0;
3839 }
3840 case FILE_DIRECTORY_INFORMATION:
3841 {
3842 struct file_directory_info *fdinfo;
3843
3844 fdinfo = (struct file_directory_info *)d_info->rptr;
3845 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3846 d_info->name = fdinfo->FileName;
3847 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3848 return 0;
3849 }
3850 case FILE_NAMES_INFORMATION:
3851 {
3852 struct file_names_info *fninfo;
3853
3854 fninfo = (struct file_names_info *)d_info->rptr;
3855 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3856 d_info->name = fninfo->FileName;
3857 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3858 return 0;
3859 }
3860 case FILEID_FULL_DIRECTORY_INFORMATION:
3861 {
3862 struct file_id_full_dir_info *dinfo;
3863
3864 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3865 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3866 d_info->name = dinfo->FileName;
3867 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3868 return 0;
3869 }
3870 case FILEID_BOTH_DIRECTORY_INFORMATION:
3871 {
3872 struct file_id_both_directory_info *fibdinfo;
3873
3874 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3875 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3876 d_info->name = fibdinfo->FileName;
3877 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3878 return 0;
3879 }
3880 case SMB_FIND_FILE_POSIX_INFO:
3881 {
3882 struct smb2_posix_info *posix_info;
3883
3884 posix_info = (struct smb2_posix_info *)d_info->rptr;
3885 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3886 d_info->name = posix_info->name;
3887 d_info->name_len = le32_to_cpu(posix_info->name_len);
3888 return 0;
3889 }
3890 default:
3891 return -EINVAL;
3892 }
3893 }
3894
3895 /**
3896 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3897 * buffer
3898 * @conn: connection instance
3899 * @info_level: smb information level
3900 * @d_info: structure included variables for query dir
3901 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3902 *
3903 * if directory has many entries, find first can't read it fully.
3904 * find next might be called multiple times to read remaining dir entries
3905 *
3906 * Return: 0 on success, otherwise error
3907 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3908 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3909 struct ksmbd_dir_info *d_info,
3910 struct ksmbd_kstat *ksmbd_kstat)
3911 {
3912 int next_entry_offset = 0;
3913 char *conv_name;
3914 int conv_len;
3915 void *kstat;
3916 int struct_sz, rc = 0;
3917
3918 conv_name = ksmbd_convert_dir_info_name(d_info,
3919 conn->local_nls,
3920 &conv_len);
3921 if (!conv_name)
3922 return -ENOMEM;
3923
3924 /* Somehow the name has only terminating NULL bytes */
3925 if (conv_len < 0) {
3926 rc = -EINVAL;
3927 goto free_conv_name;
3928 }
3929
3930 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3931 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3932 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3933
3934 if (next_entry_offset > d_info->out_buf_len) {
3935 d_info->out_buf_len = 0;
3936 rc = -ENOSPC;
3937 goto free_conv_name;
3938 }
3939
3940 kstat = d_info->wptr;
3941 if (info_level != FILE_NAMES_INFORMATION)
3942 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3943
3944 switch (info_level) {
3945 case FILE_FULL_DIRECTORY_INFORMATION:
3946 {
3947 struct file_full_directory_info *ffdinfo;
3948
3949 ffdinfo = (struct file_full_directory_info *)kstat;
3950 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3951 ffdinfo->EaSize =
3952 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3953 if (ffdinfo->EaSize)
3954 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3955 if (d_info->hide_dot_file && d_info->name[0] == '.')
3956 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3957 memcpy(ffdinfo->FileName, conv_name, conv_len);
3958 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3959 break;
3960 }
3961 case FILE_BOTH_DIRECTORY_INFORMATION:
3962 {
3963 struct file_both_directory_info *fbdinfo;
3964
3965 fbdinfo = (struct file_both_directory_info *)kstat;
3966 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3967 fbdinfo->EaSize =
3968 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3969 if (fbdinfo->EaSize)
3970 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3971 fbdinfo->ShortNameLength = 0;
3972 fbdinfo->Reserved = 0;
3973 if (d_info->hide_dot_file && d_info->name[0] == '.')
3974 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3975 memcpy(fbdinfo->FileName, conv_name, conv_len);
3976 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3977 break;
3978 }
3979 case FILE_DIRECTORY_INFORMATION:
3980 {
3981 struct file_directory_info *fdinfo;
3982
3983 fdinfo = (struct file_directory_info *)kstat;
3984 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3985 if (d_info->hide_dot_file && d_info->name[0] == '.')
3986 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3987 memcpy(fdinfo->FileName, conv_name, conv_len);
3988 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3989 break;
3990 }
3991 case FILE_NAMES_INFORMATION:
3992 {
3993 struct file_names_info *fninfo;
3994
3995 fninfo = (struct file_names_info *)kstat;
3996 fninfo->FileNameLength = cpu_to_le32(conv_len);
3997 memcpy(fninfo->FileName, conv_name, conv_len);
3998 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3999 break;
4000 }
4001 case FILEID_FULL_DIRECTORY_INFORMATION:
4002 {
4003 struct file_id_full_dir_info *dinfo;
4004
4005 dinfo = (struct file_id_full_dir_info *)kstat;
4006 dinfo->FileNameLength = cpu_to_le32(conv_len);
4007 dinfo->EaSize =
4008 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
4009 if (dinfo->EaSize)
4010 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
4011 dinfo->Reserved = 0;
4012 if (conn->is_aapl)
4013 dinfo->UniqueId = 0;
4014 else
4015 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
4016 if (d_info->hide_dot_file && d_info->name[0] == '.')
4017 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
4018 memcpy(dinfo->FileName, conv_name, conv_len);
4019 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4020 break;
4021 }
4022 case FILEID_BOTH_DIRECTORY_INFORMATION:
4023 {
4024 struct file_id_both_directory_info *fibdinfo;
4025
4026 fibdinfo = (struct file_id_both_directory_info *)kstat;
4027 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
4028 fibdinfo->EaSize =
4029 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
4030 if (fibdinfo->EaSize)
4031 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
4032 if (conn->is_aapl)
4033 fibdinfo->UniqueId = 0;
4034 else
4035 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
4036 fibdinfo->ShortNameLength = 0;
4037 fibdinfo->Reserved = 0;
4038 fibdinfo->Reserved2 = cpu_to_le16(0);
4039 if (d_info->hide_dot_file && d_info->name[0] == '.')
4040 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
4041 memcpy(fibdinfo->FileName, conv_name, conv_len);
4042 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4043 break;
4044 }
4045 case SMB_FIND_FILE_POSIX_INFO:
4046 {
4047 struct smb2_posix_info *posix_info;
4048 u64 time;
4049
4050 posix_info = (struct smb2_posix_info *)kstat;
4051 posix_info->Ignored = 0;
4052 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
4053 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
4054 posix_info->ChangeTime = cpu_to_le64(time);
4055 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
4056 posix_info->LastAccessTime = cpu_to_le64(time);
4057 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
4058 posix_info->LastWriteTime = cpu_to_le64(time);
4059 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
4060 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
4061 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
4062 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
4063 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
4064 switch (ksmbd_kstat->kstat->mode & S_IFMT) {
4065 case S_IFDIR:
4066 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT);
4067 break;
4068 case S_IFLNK:
4069 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT);
4070 break;
4071 case S_IFCHR:
4072 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT);
4073 break;
4074 case S_IFBLK:
4075 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT);
4076 break;
4077 case S_IFIFO:
4078 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT);
4079 break;
4080 case S_IFSOCK:
4081 posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT);
4082 }
4083
4084 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
4085 posix_info->DosAttributes =
4086 S_ISDIR(ksmbd_kstat->kstat->mode) ?
4087 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
4088 if (d_info->hide_dot_file && d_info->name[0] == '.')
4089 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
4090 /*
4091 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4092 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4093 * sub_auth(4 * 1(num_subauth)) + RID(4).
4094 */
4095 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
4096 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
4097 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
4098 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
4099 memcpy(posix_info->name, conv_name, conv_len);
4100 posix_info->name_len = cpu_to_le32(conv_len);
4101 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4102 break;
4103 }
4104
4105 } /* switch (info_level) */
4106
4107 d_info->last_entry_offset = d_info->data_count;
4108 d_info->data_count += next_entry_offset;
4109 d_info->out_buf_len -= next_entry_offset;
4110 d_info->wptr += next_entry_offset;
4111
4112 ksmbd_debug(SMB,
4113 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4114 info_level, d_info->out_buf_len,
4115 next_entry_offset, d_info->data_count);
4116
4117 free_conv_name:
4118 kfree(conv_name);
4119 return rc;
4120 }
4121
4122 struct smb2_query_dir_private {
4123 struct ksmbd_work *work;
4124 char *search_pattern;
4125 struct ksmbd_file *dir_fp;
4126
4127 struct ksmbd_dir_info *d_info;
4128 int info_level;
4129 };
4130
process_query_dir_entries(struct smb2_query_dir_private * priv)4131 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4132 {
4133 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4134 struct kstat kstat;
4135 struct ksmbd_kstat ksmbd_kstat;
4136 int rc;
4137 int i;
4138
4139 for (i = 0; i < priv->d_info->num_entry; i++) {
4140 struct dentry *dent;
4141
4142 if (dentry_name(priv->d_info, priv->info_level))
4143 return -EINVAL;
4144
4145 dent = lookup_one_unlocked(idmap,
4146 &QSTR_LEN(priv->d_info->name,
4147 priv->d_info->name_len),
4148 priv->dir_fp->filp->f_path.dentry);
4149
4150 if (IS_ERR(dent)) {
4151 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4152 priv->d_info->name,
4153 PTR_ERR(dent));
4154 continue;
4155 }
4156 if (unlikely(d_is_negative(dent))) {
4157 dput(dent);
4158 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4159 priv->d_info->name);
4160 continue;
4161 }
4162
4163 ksmbd_kstat.kstat = &kstat;
4164 if (priv->info_level != FILE_NAMES_INFORMATION) {
4165 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4166 idmap,
4167 dent,
4168 &ksmbd_kstat);
4169 if (rc) {
4170 dput(dent);
4171 continue;
4172 }
4173 }
4174
4175 rc = smb2_populate_readdir_entry(priv->work->conn,
4176 priv->info_level,
4177 priv->d_info,
4178 &ksmbd_kstat);
4179 dput(dent);
4180 if (rc)
4181 return rc;
4182 }
4183 return 0;
4184 }
4185
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4186 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4187 int info_level)
4188 {
4189 int struct_sz;
4190 int conv_len;
4191 int next_entry_offset;
4192
4193 struct_sz = readdir_info_level_struct_sz(info_level);
4194 if (struct_sz == -EOPNOTSUPP)
4195 return -EOPNOTSUPP;
4196
4197 conv_len = (d_info->name_len + 1) * 2;
4198 next_entry_offset = ALIGN(struct_sz + conv_len,
4199 KSMBD_DIR_INFO_ALIGNMENT);
4200
4201 if (next_entry_offset > d_info->out_buf_len) {
4202 d_info->out_buf_len = 0;
4203 return -ENOSPC;
4204 }
4205
4206 switch (info_level) {
4207 case FILE_FULL_DIRECTORY_INFORMATION:
4208 {
4209 struct file_full_directory_info *ffdinfo;
4210
4211 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4212 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4213 ffdinfo->FileName[d_info->name_len] = 0x00;
4214 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4215 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4216 break;
4217 }
4218 case FILE_BOTH_DIRECTORY_INFORMATION:
4219 {
4220 struct file_both_directory_info *fbdinfo;
4221
4222 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4223 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4224 fbdinfo->FileName[d_info->name_len] = 0x00;
4225 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4226 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4227 break;
4228 }
4229 case FILE_DIRECTORY_INFORMATION:
4230 {
4231 struct file_directory_info *fdinfo;
4232
4233 fdinfo = (struct file_directory_info *)d_info->wptr;
4234 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4235 fdinfo->FileName[d_info->name_len] = 0x00;
4236 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4237 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4238 break;
4239 }
4240 case FILE_NAMES_INFORMATION:
4241 {
4242 struct file_names_info *fninfo;
4243
4244 fninfo = (struct file_names_info *)d_info->wptr;
4245 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4246 fninfo->FileName[d_info->name_len] = 0x00;
4247 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4248 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4249 break;
4250 }
4251 case FILEID_FULL_DIRECTORY_INFORMATION:
4252 {
4253 struct file_id_full_dir_info *dinfo;
4254
4255 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4256 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4257 dinfo->FileName[d_info->name_len] = 0x00;
4258 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4259 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4260 break;
4261 }
4262 case FILEID_BOTH_DIRECTORY_INFORMATION:
4263 {
4264 struct file_id_both_directory_info *fibdinfo;
4265
4266 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4267 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4268 fibdinfo->FileName[d_info->name_len] = 0x00;
4269 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4270 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4271 break;
4272 }
4273 case SMB_FIND_FILE_POSIX_INFO:
4274 {
4275 struct smb2_posix_info *posix_info;
4276
4277 posix_info = (struct smb2_posix_info *)d_info->wptr;
4278 memcpy(posix_info->name, d_info->name, d_info->name_len);
4279 posix_info->name[d_info->name_len] = 0x00;
4280 posix_info->name_len = cpu_to_le32(d_info->name_len);
4281 posix_info->NextEntryOffset =
4282 cpu_to_le32(next_entry_offset);
4283 break;
4284 }
4285 } /* switch (info_level) */
4286
4287 d_info->num_entry++;
4288 d_info->out_buf_len -= next_entry_offset;
4289 d_info->wptr += next_entry_offset;
4290 return 0;
4291 }
4292
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4293 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4294 loff_t offset, u64 ino, unsigned int d_type)
4295 {
4296 struct ksmbd_readdir_data *buf;
4297 struct smb2_query_dir_private *priv;
4298 struct ksmbd_dir_info *d_info;
4299 int rc;
4300
4301 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4302 priv = buf->private;
4303 d_info = priv->d_info;
4304
4305 /* dot and dotdot entries are already reserved */
4306 if (!strcmp(".", name) || !strcmp("..", name))
4307 return true;
4308 d_info->num_scan++;
4309 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4310 return true;
4311 if (!match_pattern(name, namlen, priv->search_pattern))
4312 return true;
4313
4314 d_info->name = name;
4315 d_info->name_len = namlen;
4316 rc = reserve_populate_dentry(d_info, priv->info_level);
4317 if (rc)
4318 return false;
4319 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4320 d_info->out_buf_len = 0;
4321 return true;
4322 }
4323
verify_info_level(int info_level)4324 static int verify_info_level(int info_level)
4325 {
4326 switch (info_level) {
4327 case FILE_FULL_DIRECTORY_INFORMATION:
4328 case FILE_BOTH_DIRECTORY_INFORMATION:
4329 case FILE_DIRECTORY_INFORMATION:
4330 case FILE_NAMES_INFORMATION:
4331 case FILEID_FULL_DIRECTORY_INFORMATION:
4332 case FILEID_BOTH_DIRECTORY_INFORMATION:
4333 case SMB_FIND_FILE_POSIX_INFO:
4334 break;
4335 default:
4336 return -EOPNOTSUPP;
4337 }
4338
4339 return 0;
4340 }
4341
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4342 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4343 {
4344 int free_len;
4345
4346 free_len = (int)(work->response_sz -
4347 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4348 return free_len;
4349 }
4350
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4351 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4352 unsigned short hdr2_len,
4353 unsigned int out_buf_len)
4354 {
4355 int free_len;
4356
4357 if (out_buf_len > work->conn->vals->max_trans_size)
4358 return -EINVAL;
4359
4360 free_len = smb2_resp_buf_len(work, hdr2_len);
4361 if (free_len < 0)
4362 return -EINVAL;
4363
4364 return min_t(int, out_buf_len, free_len);
4365 }
4366
smb2_query_dir(struct ksmbd_work * work)4367 int smb2_query_dir(struct ksmbd_work *work)
4368 {
4369 struct ksmbd_conn *conn = work->conn;
4370 struct smb2_query_directory_req *req;
4371 struct smb2_query_directory_rsp *rsp;
4372 struct ksmbd_share_config *share = work->tcon->share_conf;
4373 struct ksmbd_file *dir_fp = NULL;
4374 struct ksmbd_dir_info d_info;
4375 int rc = 0;
4376 char *srch_ptr = NULL;
4377 unsigned char srch_flag;
4378 int buffer_sz;
4379 struct smb2_query_dir_private query_dir_private = {NULL, };
4380
4381 ksmbd_debug(SMB, "Received smb2 query directory request\n");
4382
4383 WORK_BUFFERS(work, req, rsp);
4384
4385 if (ksmbd_override_fsids(work)) {
4386 rsp->hdr.Status = STATUS_NO_MEMORY;
4387 smb2_set_err_rsp(work);
4388 return -ENOMEM;
4389 }
4390
4391 rc = verify_info_level(req->FileInformationClass);
4392 if (rc) {
4393 rc = -EFAULT;
4394 goto err_out2;
4395 }
4396
4397 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4398 if (!dir_fp) {
4399 rc = -EBADF;
4400 goto err_out2;
4401 }
4402
4403 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4404 inode_permission(file_mnt_idmap(dir_fp->filp),
4405 file_inode(dir_fp->filp),
4406 MAY_READ | MAY_EXEC)) {
4407 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4408 rc = -EACCES;
4409 goto err_out2;
4410 }
4411
4412 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4413 pr_err("can't do query dir for a file\n");
4414 rc = -EINVAL;
4415 goto err_out2;
4416 }
4417
4418 srch_flag = req->Flags;
4419 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4420 le16_to_cpu(req->FileNameLength), 1,
4421 conn->local_nls);
4422 if (IS_ERR(srch_ptr)) {
4423 ksmbd_debug(SMB, "Search Pattern not found\n");
4424 rc = -EINVAL;
4425 goto err_out2;
4426 } else {
4427 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4428 }
4429
4430 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4431 ksmbd_debug(SMB, "Restart directory scan\n");
4432 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4433 }
4434
4435 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4436 d_info.wptr = (char *)rsp->Buffer;
4437 d_info.rptr = (char *)rsp->Buffer;
4438 d_info.out_buf_len =
4439 smb2_calc_max_out_buf_len(work, 8,
4440 le32_to_cpu(req->OutputBufferLength));
4441 if (d_info.out_buf_len < 0) {
4442 rc = -EINVAL;
4443 goto err_out;
4444 }
4445 d_info.flags = srch_flag;
4446
4447 /*
4448 * reserve dot and dotdot entries in head of buffer
4449 * in first response
4450 */
4451 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4452 dir_fp, &d_info, srch_ptr,
4453 smb2_populate_readdir_entry);
4454 if (rc == -ENOSPC)
4455 rc = 0;
4456 else if (rc)
4457 goto err_out;
4458
4459 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4460 d_info.hide_dot_file = true;
4461
4462 buffer_sz = d_info.out_buf_len;
4463 d_info.rptr = d_info.wptr;
4464 query_dir_private.work = work;
4465 query_dir_private.search_pattern = srch_ptr;
4466 query_dir_private.dir_fp = dir_fp;
4467 query_dir_private.d_info = &d_info;
4468 query_dir_private.info_level = req->FileInformationClass;
4469 dir_fp->readdir_data.private = &query_dir_private;
4470 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4471 again:
4472 d_info.num_scan = 0;
4473 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4474 /*
4475 * num_entry can be 0 if the directory iteration stops before reaching
4476 * the end of the directory and no file is matched with the search
4477 * pattern.
4478 */
4479 if (rc >= 0 && !d_info.num_entry && d_info.num_scan &&
4480 d_info.out_buf_len > 0)
4481 goto again;
4482 /*
4483 * req->OutputBufferLength is too small to contain even one entry.
4484 * In this case, it immediately returns OutputBufferLength 0 to client.
4485 */
4486 if (!d_info.out_buf_len && !d_info.num_entry)
4487 goto no_buf_len;
4488 if (rc > 0 || rc == -ENOSPC)
4489 rc = 0;
4490 else if (rc)
4491 goto err_out;
4492
4493 d_info.wptr = d_info.rptr;
4494 d_info.out_buf_len = buffer_sz;
4495 rc = process_query_dir_entries(&query_dir_private);
4496 if (rc)
4497 goto err_out;
4498
4499 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4500 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4501 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4502 } else {
4503 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4504 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4505 }
4506 rsp->StructureSize = cpu_to_le16(9);
4507 rsp->OutputBufferOffset = cpu_to_le16(0);
4508 rsp->OutputBufferLength = cpu_to_le32(0);
4509 rsp->Buffer[0] = 0;
4510 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4511 offsetof(struct smb2_query_directory_rsp, Buffer)
4512 + 1);
4513 if (rc)
4514 goto err_out;
4515 } else {
4516 no_buf_len:
4517 ((struct file_directory_info *)
4518 ((char *)rsp->Buffer + d_info.last_entry_offset))
4519 ->NextEntryOffset = 0;
4520 if (d_info.data_count >= d_info.last_entry_off_align)
4521 d_info.data_count -= d_info.last_entry_off_align;
4522
4523 rsp->StructureSize = cpu_to_le16(9);
4524 rsp->OutputBufferOffset = cpu_to_le16(72);
4525 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4526 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4527 offsetof(struct smb2_query_directory_rsp, Buffer) +
4528 d_info.data_count);
4529 if (rc)
4530 goto err_out;
4531 }
4532
4533 kfree(srch_ptr);
4534 ksmbd_fd_put(work, dir_fp);
4535 ksmbd_revert_fsids(work);
4536 return 0;
4537
4538 err_out:
4539 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4540 kfree(srch_ptr);
4541
4542 err_out2:
4543 if (rc == -EINVAL)
4544 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4545 else if (rc == -EACCES)
4546 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4547 else if (rc == -ENOENT)
4548 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4549 else if (rc == -EBADF)
4550 rsp->hdr.Status = STATUS_FILE_CLOSED;
4551 else if (rc == -ENOMEM)
4552 rsp->hdr.Status = STATUS_NO_MEMORY;
4553 else if (rc == -EFAULT)
4554 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4555 else if (rc == -EIO)
4556 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4557 if (!rsp->hdr.Status)
4558 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4559
4560 smb2_set_err_rsp(work);
4561 ksmbd_fd_put(work, dir_fp);
4562 ksmbd_revert_fsids(work);
4563 return 0;
4564 }
4565
4566 /**
4567 * buffer_check_err() - helper function to check buffer errors
4568 * @reqOutputBufferLength: max buffer length expected in command response
4569 * @rsp: query info response buffer contains output buffer length
4570 * @rsp_org: base response buffer pointer in case of chained response
4571 *
4572 * Return: 0 on success, otherwise error
4573 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4574 static int buffer_check_err(int reqOutputBufferLength,
4575 struct smb2_query_info_rsp *rsp,
4576 void *rsp_org)
4577 {
4578 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4579 pr_err("Invalid Buffer Size Requested\n");
4580 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4581 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4582 return -EINVAL;
4583 }
4584 return 0;
4585 }
4586
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4587 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4588 void *rsp_org)
4589 {
4590 struct smb2_file_standard_info *sinfo;
4591
4592 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4593
4594 sinfo->AllocationSize = cpu_to_le64(4096);
4595 sinfo->EndOfFile = cpu_to_le64(0);
4596 sinfo->NumberOfLinks = cpu_to_le32(1);
4597 sinfo->DeletePending = 1;
4598 sinfo->Directory = 0;
4599 rsp->OutputBufferLength =
4600 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4601 }
4602
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4603 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4604 void *rsp_org)
4605 {
4606 struct smb2_file_internal_info *file_info;
4607
4608 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4609
4610 /* any unique number */
4611 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4612 rsp->OutputBufferLength =
4613 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4614 }
4615
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4616 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4617 struct smb2_query_info_req *req,
4618 struct smb2_query_info_rsp *rsp,
4619 void *rsp_org)
4620 {
4621 u64 id;
4622 int rc;
4623
4624 /*
4625 * Windows can sometime send query file info request on
4626 * pipe without opening it, checking error condition here
4627 */
4628 id = req->VolatileFileId;
4629
4630 lockdep_assert_not_held(&sess->rpc_lock);
4631
4632 down_read(&sess->rpc_lock);
4633 if (!ksmbd_session_rpc_method(sess, id)) {
4634 up_read(&sess->rpc_lock);
4635 return -ENOENT;
4636 }
4637 up_read(&sess->rpc_lock);
4638
4639 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4640 req->FileInfoClass, req->VolatileFileId);
4641
4642 switch (req->FileInfoClass) {
4643 case FILE_STANDARD_INFORMATION:
4644 get_standard_info_pipe(rsp, rsp_org);
4645 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4646 rsp, rsp_org);
4647 break;
4648 case FILE_INTERNAL_INFORMATION:
4649 get_internal_info_pipe(rsp, id, rsp_org);
4650 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4651 rsp, rsp_org);
4652 break;
4653 default:
4654 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4655 req->FileInfoClass);
4656 rc = -EOPNOTSUPP;
4657 }
4658 return rc;
4659 }
4660
4661 /**
4662 * smb2_get_ea() - handler for smb2 get extended attribute command
4663 * @work: smb work containing query info command buffer
4664 * @fp: ksmbd_file pointer
4665 * @req: get extended attribute request
4666 * @rsp: response buffer pointer
4667 * @rsp_org: base response buffer pointer in case of chained response
4668 *
4669 * Return: 0 on success, otherwise error
4670 */
smb2_get_ea(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4671 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4672 struct smb2_query_info_req *req,
4673 struct smb2_query_info_rsp *rsp, void *rsp_org)
4674 {
4675 struct smb2_ea_info *eainfo, *prev_eainfo;
4676 char *name, *ptr, *xattr_list = NULL, *buf;
4677 int rc, name_len, value_len, xattr_list_len, idx;
4678 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4679 struct smb2_ea_info_req *ea_req = NULL;
4680 const struct path *path;
4681 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4682
4683 if (!(fp->daccess & FILE_READ_EA_LE)) {
4684 pr_err("Not permitted to read ext attr : 0x%x\n",
4685 fp->daccess);
4686 return -EACCES;
4687 }
4688
4689 path = &fp->filp->f_path;
4690 /* single EA entry is requested with given user.* name */
4691 if (req->InputBufferLength) {
4692 if (le32_to_cpu(req->InputBufferLength) <=
4693 sizeof(struct smb2_ea_info_req))
4694 return -EINVAL;
4695
4696 ea_req = (struct smb2_ea_info_req *)((char *)req +
4697 le16_to_cpu(req->InputBufferOffset));
4698 } else {
4699 /* need to send all EAs, if no specific EA is requested*/
4700 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4701 ksmbd_debug(SMB,
4702 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4703 le32_to_cpu(req->Flags));
4704 }
4705
4706 buf_free_len =
4707 smb2_calc_max_out_buf_len(work, 8,
4708 le32_to_cpu(req->OutputBufferLength));
4709 if (buf_free_len < 0)
4710 return -EINVAL;
4711
4712 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4713 if (rc < 0) {
4714 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4715 goto out;
4716 } else if (!rc) { /* there is no EA in the file */
4717 ksmbd_debug(SMB, "no ea data in the file\n");
4718 goto done;
4719 }
4720 xattr_list_len = rc;
4721
4722 ptr = (char *)rsp->Buffer;
4723 eainfo = (struct smb2_ea_info *)ptr;
4724 prev_eainfo = eainfo;
4725 idx = 0;
4726
4727 while (idx < xattr_list_len) {
4728 name = xattr_list + idx;
4729 name_len = strlen(name);
4730
4731 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4732 idx += name_len + 1;
4733
4734 /*
4735 * CIFS does not support EA other than user.* namespace,
4736 * still keep the framework generic, to list other attrs
4737 * in future.
4738 */
4739 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4740 continue;
4741
4742 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4743 STREAM_PREFIX_LEN))
4744 continue;
4745
4746 if (req->InputBufferLength &&
4747 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4748 ea_req->EaNameLength))
4749 continue;
4750
4751 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4752 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4753 continue;
4754
4755 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4756 name_len -= XATTR_USER_PREFIX_LEN;
4757
4758 ptr = eainfo->name + name_len + 1;
4759 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4760 name_len + 1);
4761 /* bailout if xattr can't fit in buf_free_len */
4762 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4763 name, &buf);
4764 if (value_len <= 0) {
4765 rc = -ENOENT;
4766 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4767 goto out;
4768 }
4769
4770 buf_free_len -= value_len;
4771 if (buf_free_len < 0) {
4772 kfree(buf);
4773 break;
4774 }
4775
4776 memcpy(ptr, buf, value_len);
4777 kfree(buf);
4778
4779 ptr += value_len;
4780 eainfo->Flags = 0;
4781 eainfo->EaNameLength = name_len;
4782
4783 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4784 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4785 name_len);
4786 else
4787 memcpy(eainfo->name, name, name_len);
4788
4789 eainfo->name[name_len] = '\0';
4790 eainfo->EaValueLength = cpu_to_le16(value_len);
4791 next_offset = offsetof(struct smb2_ea_info, name) +
4792 name_len + 1 + value_len;
4793
4794 /* align next xattr entry at 4 byte bundary */
4795 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4796 if (alignment_bytes) {
4797 memset(ptr, '\0', alignment_bytes);
4798 ptr += alignment_bytes;
4799 next_offset += alignment_bytes;
4800 buf_free_len -= alignment_bytes;
4801 }
4802 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4803 prev_eainfo = eainfo;
4804 eainfo = (struct smb2_ea_info *)ptr;
4805 rsp_data_cnt += next_offset;
4806
4807 if (req->InputBufferLength) {
4808 ksmbd_debug(SMB, "single entry requested\n");
4809 break;
4810 }
4811 }
4812
4813 /* no more ea entries */
4814 prev_eainfo->NextEntryOffset = 0;
4815 done:
4816 rc = 0;
4817 if (rsp_data_cnt == 0)
4818 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4819 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4820 out:
4821 kvfree(xattr_list);
4822 return rc;
4823 }
4824
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4825 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4826 struct ksmbd_file *fp, void *rsp_org)
4827 {
4828 struct smb2_file_access_info *file_info;
4829
4830 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4831 file_info->AccessFlags = fp->daccess;
4832 rsp->OutputBufferLength =
4833 cpu_to_le32(sizeof(struct smb2_file_access_info));
4834 }
4835
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4836 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4837 struct ksmbd_file *fp, void *rsp_org)
4838 {
4839 struct smb2_file_basic_info *basic_info;
4840 struct kstat stat;
4841 u64 time;
4842 int ret;
4843
4844 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4845 pr_err("no right to read the attributes : 0x%x\n",
4846 fp->daccess);
4847 return -EACCES;
4848 }
4849
4850 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4851 AT_STATX_SYNC_AS_STAT);
4852 if (ret)
4853 return ret;
4854
4855 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4856 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4857 time = ksmbd_UnixTimeToNT(stat.atime);
4858 basic_info->LastAccessTime = cpu_to_le64(time);
4859 time = ksmbd_UnixTimeToNT(stat.mtime);
4860 basic_info->LastWriteTime = cpu_to_le64(time);
4861 time = ksmbd_UnixTimeToNT(stat.ctime);
4862 basic_info->ChangeTime = cpu_to_le64(time);
4863 basic_info->Attributes = fp->f_ci->m_fattr;
4864 basic_info->Pad1 = 0;
4865 rsp->OutputBufferLength =
4866 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4867 return 0;
4868 }
4869
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4870 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4871 struct ksmbd_file *fp, void *rsp_org)
4872 {
4873 struct smb2_file_standard_info *sinfo;
4874 unsigned int delete_pending;
4875 struct kstat stat;
4876 int ret;
4877
4878 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4879 AT_STATX_SYNC_AS_STAT);
4880 if (ret)
4881 return ret;
4882
4883 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4884 delete_pending = ksmbd_inode_pending_delete(fp);
4885
4886 if (ksmbd_stream_fd(fp) == false) {
4887 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4888 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4889 } else {
4890 sinfo->AllocationSize = cpu_to_le64(fp->stream.size);
4891 sinfo->EndOfFile = cpu_to_le64(fp->stream.size);
4892 }
4893 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4894 sinfo->DeletePending = delete_pending;
4895 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4896 rsp->OutputBufferLength =
4897 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4898
4899 return 0;
4900 }
4901
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4902 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4903 void *rsp_org)
4904 {
4905 struct smb2_file_alignment_info *file_info;
4906
4907 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4908 file_info->AlignmentRequirement = 0;
4909 rsp->OutputBufferLength =
4910 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4911 }
4912
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4913 static int get_file_all_info(struct ksmbd_work *work,
4914 struct smb2_query_info_rsp *rsp,
4915 struct ksmbd_file *fp,
4916 void *rsp_org)
4917 {
4918 struct ksmbd_conn *conn = work->conn;
4919 struct smb2_file_all_info *file_info;
4920 unsigned int delete_pending;
4921 struct kstat stat;
4922 int conv_len;
4923 char *filename;
4924 u64 time;
4925 int ret;
4926
4927 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4928 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4929 fp->daccess);
4930 return -EACCES;
4931 }
4932
4933 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4934 if (IS_ERR(filename))
4935 return PTR_ERR(filename);
4936
4937 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4938 AT_STATX_SYNC_AS_STAT);
4939 if (ret)
4940 return ret;
4941
4942 ksmbd_debug(SMB, "filename = %s\n", filename);
4943 delete_pending = ksmbd_inode_pending_delete(fp);
4944 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4945
4946 file_info->CreationTime = cpu_to_le64(fp->create_time);
4947 time = ksmbd_UnixTimeToNT(stat.atime);
4948 file_info->LastAccessTime = cpu_to_le64(time);
4949 time = ksmbd_UnixTimeToNT(stat.mtime);
4950 file_info->LastWriteTime = cpu_to_le64(time);
4951 time = ksmbd_UnixTimeToNT(stat.ctime);
4952 file_info->ChangeTime = cpu_to_le64(time);
4953 file_info->Attributes = fp->f_ci->m_fattr;
4954 file_info->Pad1 = 0;
4955 if (ksmbd_stream_fd(fp) == false) {
4956 file_info->AllocationSize =
4957 cpu_to_le64(stat.blocks << 9);
4958 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4959 } else {
4960 file_info->AllocationSize = cpu_to_le64(fp->stream.size);
4961 file_info->EndOfFile = cpu_to_le64(fp->stream.size);
4962 }
4963 file_info->NumberOfLinks =
4964 cpu_to_le32(get_nlink(&stat) - delete_pending);
4965 file_info->DeletePending = delete_pending;
4966 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4967 file_info->Pad2 = 0;
4968 file_info->IndexNumber = cpu_to_le64(stat.ino);
4969 file_info->EASize = 0;
4970 file_info->AccessFlags = fp->daccess;
4971 if (ksmbd_stream_fd(fp) == false)
4972 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4973 else
4974 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos);
4975 file_info->Mode = fp->coption;
4976 file_info->AlignmentRequirement = 0;
4977 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4978 PATH_MAX, conn->local_nls, 0);
4979 conv_len *= 2;
4980 file_info->FileNameLength = cpu_to_le32(conv_len);
4981 rsp->OutputBufferLength =
4982 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4983 kfree(filename);
4984 return 0;
4985 }
4986
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4987 static void get_file_alternate_info(struct ksmbd_work *work,
4988 struct smb2_query_info_rsp *rsp,
4989 struct ksmbd_file *fp,
4990 void *rsp_org)
4991 {
4992 struct ksmbd_conn *conn = work->conn;
4993 struct smb2_file_alt_name_info *file_info;
4994 struct dentry *dentry = fp->filp->f_path.dentry;
4995 int conv_len;
4996
4997 spin_lock(&dentry->d_lock);
4998 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4999 conv_len = ksmbd_extract_shortname(conn,
5000 dentry->d_name.name,
5001 file_info->FileName);
5002 spin_unlock(&dentry->d_lock);
5003 file_info->FileNameLength = cpu_to_le32(conv_len);
5004 rsp->OutputBufferLength =
5005 cpu_to_le32(struct_size(file_info, FileName, conv_len));
5006 }
5007
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5008 static int get_file_stream_info(struct ksmbd_work *work,
5009 struct smb2_query_info_rsp *rsp,
5010 struct ksmbd_file *fp,
5011 void *rsp_org)
5012 {
5013 struct ksmbd_conn *conn = work->conn;
5014 struct smb2_file_stream_info *file_info;
5015 char *stream_name, *xattr_list = NULL, *stream_buf;
5016 struct kstat stat;
5017 const struct path *path = &fp->filp->f_path;
5018 ssize_t xattr_list_len;
5019 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
5020 int buf_free_len;
5021 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
5022 int ret;
5023
5024 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5025 AT_STATX_SYNC_AS_STAT);
5026 if (ret)
5027 return ret;
5028
5029 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
5030
5031 buf_free_len =
5032 smb2_calc_max_out_buf_len(work, 8,
5033 le32_to_cpu(req->OutputBufferLength));
5034 if (buf_free_len < 0)
5035 goto out;
5036
5037 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
5038 if (xattr_list_len < 0) {
5039 goto out;
5040 } else if (!xattr_list_len) {
5041 ksmbd_debug(SMB, "empty xattr in the file\n");
5042 goto out;
5043 }
5044
5045 while (idx < xattr_list_len) {
5046 stream_name = xattr_list + idx;
5047 streamlen = strlen(stream_name);
5048 idx += streamlen + 1;
5049
5050 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
5051
5052 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
5053 STREAM_PREFIX, STREAM_PREFIX_LEN))
5054 continue;
5055
5056 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
5057 STREAM_PREFIX_LEN);
5058 streamlen = stream_name_len;
5059
5060 /* plus : size */
5061 streamlen += 1;
5062 stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP);
5063 if (!stream_buf)
5064 break;
5065
5066 streamlen = snprintf(stream_buf, streamlen + 1,
5067 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
5068
5069 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
5070 if (next > buf_free_len) {
5071 kfree(stream_buf);
5072 break;
5073 }
5074
5075 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
5076 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
5077 stream_buf, streamlen,
5078 conn->local_nls, 0);
5079 streamlen *= 2;
5080 kfree(stream_buf);
5081 file_info->StreamNameLength = cpu_to_le32(streamlen);
5082 file_info->StreamSize = cpu_to_le64(stream_name_len);
5083 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
5084
5085 nbytes += next;
5086 buf_free_len -= next;
5087 file_info->NextEntryOffset = cpu_to_le32(next);
5088 }
5089
5090 out:
5091 if (!S_ISDIR(stat.mode) &&
5092 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
5093 file_info = (struct smb2_file_stream_info *)
5094 &rsp->Buffer[nbytes];
5095 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
5096 "::$DATA", 7, conn->local_nls, 0);
5097 streamlen *= 2;
5098 file_info->StreamNameLength = cpu_to_le32(streamlen);
5099 file_info->StreamSize = cpu_to_le64(stat.size);
5100 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
5101 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
5102 }
5103
5104 /* last entry offset should be 0 */
5105 file_info->NextEntryOffset = 0;
5106 kvfree(xattr_list);
5107
5108 rsp->OutputBufferLength = cpu_to_le32(nbytes);
5109
5110 return 0;
5111 }
5112
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5113 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
5114 struct ksmbd_file *fp, void *rsp_org)
5115 {
5116 struct smb2_file_internal_info *file_info;
5117 struct kstat stat;
5118 int ret;
5119
5120 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5121 AT_STATX_SYNC_AS_STAT);
5122 if (ret)
5123 return ret;
5124
5125 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5126 file_info->IndexNumber = cpu_to_le64(stat.ino);
5127 rsp->OutputBufferLength =
5128 cpu_to_le32(sizeof(struct smb2_file_internal_info));
5129
5130 return 0;
5131 }
5132
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5133 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5134 struct ksmbd_file *fp, void *rsp_org)
5135 {
5136 struct smb2_file_ntwrk_info *file_info;
5137 struct kstat stat;
5138 u64 time;
5139 int ret;
5140
5141 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5142 pr_err("no right to read the attributes : 0x%x\n",
5143 fp->daccess);
5144 return -EACCES;
5145 }
5146
5147 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5148 AT_STATX_SYNC_AS_STAT);
5149 if (ret)
5150 return ret;
5151
5152 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5153
5154 file_info->CreationTime = cpu_to_le64(fp->create_time);
5155 time = ksmbd_UnixTimeToNT(stat.atime);
5156 file_info->LastAccessTime = cpu_to_le64(time);
5157 time = ksmbd_UnixTimeToNT(stat.mtime);
5158 file_info->LastWriteTime = cpu_to_le64(time);
5159 time = ksmbd_UnixTimeToNT(stat.ctime);
5160 file_info->ChangeTime = cpu_to_le64(time);
5161 file_info->Attributes = fp->f_ci->m_fattr;
5162 if (ksmbd_stream_fd(fp) == false) {
5163 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5164 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5165 } else {
5166 file_info->AllocationSize = cpu_to_le64(fp->stream.size);
5167 file_info->EndOfFile = cpu_to_le64(fp->stream.size);
5168 }
5169 file_info->Reserved = cpu_to_le32(0);
5170 rsp->OutputBufferLength =
5171 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5172 return 0;
5173 }
5174
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5175 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5176 {
5177 struct smb2_file_ea_info *file_info;
5178
5179 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5180 file_info->EASize = 0;
5181 rsp->OutputBufferLength =
5182 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5183 }
5184
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5185 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5186 struct ksmbd_file *fp, void *rsp_org)
5187 {
5188 struct smb2_file_pos_info *file_info;
5189
5190 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5191 if (ksmbd_stream_fd(fp) == false)
5192 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5193 else
5194 file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos);
5195
5196 rsp->OutputBufferLength =
5197 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5198 }
5199
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5200 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5201 struct ksmbd_file *fp, void *rsp_org)
5202 {
5203 struct smb2_file_mode_info *file_info;
5204
5205 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5206 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5207 rsp->OutputBufferLength =
5208 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5209 }
5210
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5211 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5212 struct ksmbd_file *fp, void *rsp_org)
5213 {
5214 struct smb2_file_comp_info *file_info;
5215 struct kstat stat;
5216 int ret;
5217
5218 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5219 AT_STATX_SYNC_AS_STAT);
5220 if (ret)
5221 return ret;
5222
5223 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5224 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5225 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5226 file_info->CompressionUnitShift = 0;
5227 file_info->ChunkShift = 0;
5228 file_info->ClusterShift = 0;
5229 memset(&file_info->Reserved[0], 0, 3);
5230
5231 rsp->OutputBufferLength =
5232 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5233
5234 return 0;
5235 }
5236
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5237 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5238 struct ksmbd_file *fp, void *rsp_org)
5239 {
5240 struct smb2_file_attr_tag_info *file_info;
5241
5242 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5243 pr_err("no right to read the attributes : 0x%x\n",
5244 fp->daccess);
5245 return -EACCES;
5246 }
5247
5248 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5249 file_info->FileAttributes = fp->f_ci->m_fattr;
5250 file_info->ReparseTag = 0;
5251 rsp->OutputBufferLength =
5252 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5253 return 0;
5254 }
5255
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5256 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5257 struct ksmbd_file *fp, void *rsp_org)
5258 {
5259 struct smb311_posix_qinfo *file_info;
5260 struct inode *inode = file_inode(fp->filp);
5261 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5262 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5263 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5264 struct kstat stat;
5265 u64 time;
5266 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5267 int ret;
5268
5269 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5270 AT_STATX_SYNC_AS_STAT);
5271 if (ret)
5272 return ret;
5273
5274 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
5275 file_info->CreationTime = cpu_to_le64(fp->create_time);
5276 time = ksmbd_UnixTimeToNT(stat.atime);
5277 file_info->LastAccessTime = cpu_to_le64(time);
5278 time = ksmbd_UnixTimeToNT(stat.mtime);
5279 file_info->LastWriteTime = cpu_to_le64(time);
5280 time = ksmbd_UnixTimeToNT(stat.ctime);
5281 file_info->ChangeTime = cpu_to_le64(time);
5282 file_info->DosAttributes = fp->f_ci->m_fattr;
5283 file_info->Inode = cpu_to_le64(stat.ino);
5284 if (ksmbd_stream_fd(fp) == false) {
5285 file_info->EndOfFile = cpu_to_le64(stat.size);
5286 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5287 } else {
5288 file_info->EndOfFile = cpu_to_le64(fp->stream.size);
5289 file_info->AllocationSize = cpu_to_le64(fp->stream.size);
5290 }
5291 file_info->HardLinks = cpu_to_le32(stat.nlink);
5292 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5293 switch (stat.mode & S_IFMT) {
5294 case S_IFDIR:
5295 file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT);
5296 break;
5297 case S_IFLNK:
5298 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT);
5299 break;
5300 case S_IFCHR:
5301 file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT);
5302 break;
5303 case S_IFBLK:
5304 file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT);
5305 break;
5306 case S_IFIFO:
5307 file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT);
5308 break;
5309 case S_IFSOCK:
5310 file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT);
5311 }
5312
5313 file_info->DeviceId = cpu_to_le32(stat.rdev);
5314
5315 /*
5316 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5317 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5318 * sub_auth(4 * 1(num_subauth)) + RID(4).
5319 */
5320 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5321 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5322 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5323 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5324
5325 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5326
5327 return 0;
5328 }
5329
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5330 static int smb2_get_info_file(struct ksmbd_work *work,
5331 struct smb2_query_info_req *req,
5332 struct smb2_query_info_rsp *rsp)
5333 {
5334 struct ksmbd_file *fp;
5335 int fileinfoclass = 0;
5336 int rc = 0;
5337 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5338
5339 if (test_share_config_flag(work->tcon->share_conf,
5340 KSMBD_SHARE_FLAG_PIPE)) {
5341 /* smb2 info file called for pipe */
5342 return smb2_get_info_file_pipe(work->sess, req, rsp,
5343 work->response_buf);
5344 }
5345
5346 if (work->next_smb2_rcv_hdr_off) {
5347 if (!has_file_id(req->VolatileFileId)) {
5348 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5349 work->compound_fid);
5350 id = work->compound_fid;
5351 pid = work->compound_pfid;
5352 }
5353 }
5354
5355 if (!has_file_id(id)) {
5356 id = req->VolatileFileId;
5357 pid = req->PersistentFileId;
5358 }
5359
5360 fp = ksmbd_lookup_fd_slow(work, id, pid);
5361 if (!fp)
5362 return -ENOENT;
5363
5364 fileinfoclass = req->FileInfoClass;
5365
5366 switch (fileinfoclass) {
5367 case FILE_ACCESS_INFORMATION:
5368 get_file_access_info(rsp, fp, work->response_buf);
5369 break;
5370
5371 case FILE_BASIC_INFORMATION:
5372 rc = get_file_basic_info(rsp, fp, work->response_buf);
5373 break;
5374
5375 case FILE_STANDARD_INFORMATION:
5376 rc = get_file_standard_info(rsp, fp, work->response_buf);
5377 break;
5378
5379 case FILE_ALIGNMENT_INFORMATION:
5380 get_file_alignment_info(rsp, work->response_buf);
5381 break;
5382
5383 case FILE_ALL_INFORMATION:
5384 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5385 break;
5386
5387 case FILE_ALTERNATE_NAME_INFORMATION:
5388 get_file_alternate_info(work, rsp, fp, work->response_buf);
5389 break;
5390
5391 case FILE_STREAM_INFORMATION:
5392 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5393 break;
5394
5395 case FILE_INTERNAL_INFORMATION:
5396 rc = get_file_internal_info(rsp, fp, work->response_buf);
5397 break;
5398
5399 case FILE_NETWORK_OPEN_INFORMATION:
5400 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5401 break;
5402
5403 case FILE_EA_INFORMATION:
5404 get_file_ea_info(rsp, work->response_buf);
5405 break;
5406
5407 case FILE_FULL_EA_INFORMATION:
5408 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5409 break;
5410
5411 case FILE_POSITION_INFORMATION:
5412 get_file_position_info(rsp, fp, work->response_buf);
5413 break;
5414
5415 case FILE_MODE_INFORMATION:
5416 get_file_mode_info(rsp, fp, work->response_buf);
5417 break;
5418
5419 case FILE_COMPRESSION_INFORMATION:
5420 rc = get_file_compression_info(rsp, fp, work->response_buf);
5421 break;
5422
5423 case FILE_ATTRIBUTE_TAG_INFORMATION:
5424 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5425 break;
5426 case SMB_FIND_FILE_POSIX_INFO:
5427 if (!work->tcon->posix_extensions) {
5428 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5429 rc = -EOPNOTSUPP;
5430 } else {
5431 rc = find_file_posix_info(rsp, fp, work->response_buf);
5432 }
5433 break;
5434 default:
5435 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5436 fileinfoclass);
5437 rc = -EOPNOTSUPP;
5438 }
5439 if (!rc)
5440 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5441 rsp, work->response_buf);
5442 ksmbd_fd_put(work, fp);
5443 return rc;
5444 }
5445
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5446 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5447 struct smb2_query_info_req *req,
5448 struct smb2_query_info_rsp *rsp)
5449 {
5450 struct ksmbd_session *sess = work->sess;
5451 struct ksmbd_conn *conn = work->conn;
5452 struct ksmbd_share_config *share = work->tcon->share_conf;
5453 int fsinfoclass = 0;
5454 struct kstatfs stfs;
5455 struct path path;
5456 int rc = 0, len;
5457
5458 if (!share->path)
5459 return -EIO;
5460
5461 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5462 if (rc) {
5463 pr_err("cannot create vfs path\n");
5464 return -EIO;
5465 }
5466
5467 rc = vfs_statfs(&path, &stfs);
5468 if (rc) {
5469 pr_err("cannot do stat of path %s\n", share->path);
5470 path_put(&path);
5471 return -EIO;
5472 }
5473
5474 fsinfoclass = req->FileInfoClass;
5475
5476 switch (fsinfoclass) {
5477 case FS_DEVICE_INFORMATION:
5478 {
5479 struct filesystem_device_info *info;
5480
5481 info = (struct filesystem_device_info *)rsp->Buffer;
5482
5483 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5484 info->DeviceCharacteristics =
5485 cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5486 if (!test_tree_conn_flag(work->tcon,
5487 KSMBD_TREE_CONN_FLAG_WRITABLE))
5488 info->DeviceCharacteristics |=
5489 cpu_to_le32(FILE_READ_ONLY_DEVICE);
5490 rsp->OutputBufferLength = cpu_to_le32(8);
5491 break;
5492 }
5493 case FS_ATTRIBUTE_INFORMATION:
5494 {
5495 struct filesystem_attribute_info *info;
5496 size_t sz;
5497
5498 info = (struct filesystem_attribute_info *)rsp->Buffer;
5499 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5500 FILE_PERSISTENT_ACLS |
5501 FILE_UNICODE_ON_DISK |
5502 FILE_CASE_PRESERVED_NAMES |
5503 FILE_CASE_SENSITIVE_SEARCH |
5504 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5505
5506 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5507
5508 if (test_share_config_flag(work->tcon->share_conf,
5509 KSMBD_SHARE_FLAG_STREAMS))
5510 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5511
5512 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5513 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5514 "NTFS", PATH_MAX, conn->local_nls, 0);
5515 len = len * 2;
5516 info->FileSystemNameLen = cpu_to_le32(len);
5517 sz = sizeof(struct filesystem_attribute_info) + len;
5518 rsp->OutputBufferLength = cpu_to_le32(sz);
5519 break;
5520 }
5521 case FS_VOLUME_INFORMATION:
5522 {
5523 struct filesystem_vol_info *info;
5524 size_t sz;
5525 unsigned int serial_crc = 0;
5526
5527 info = (struct filesystem_vol_info *)(rsp->Buffer);
5528 info->VolumeCreationTime = 0;
5529 serial_crc = crc32_le(serial_crc, share->name,
5530 strlen(share->name));
5531 serial_crc = crc32_le(serial_crc, share->path,
5532 strlen(share->path));
5533 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5534 strlen(ksmbd_netbios_name()));
5535 /* Taking dummy value of serial number*/
5536 info->SerialNumber = cpu_to_le32(serial_crc);
5537 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5538 share->name, PATH_MAX,
5539 conn->local_nls, 0);
5540 len = len * 2;
5541 info->VolumeLabelSize = cpu_to_le32(len);
5542 info->Reserved = 0;
5543 sz = sizeof(struct filesystem_vol_info) + len;
5544 rsp->OutputBufferLength = cpu_to_le32(sz);
5545 break;
5546 }
5547 case FS_SIZE_INFORMATION:
5548 {
5549 struct filesystem_info *info;
5550
5551 info = (struct filesystem_info *)(rsp->Buffer);
5552 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5553 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5554 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5555 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5556 rsp->OutputBufferLength = cpu_to_le32(24);
5557 break;
5558 }
5559 case FS_FULL_SIZE_INFORMATION:
5560 {
5561 struct smb2_fs_full_size_info *info;
5562
5563 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5564 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5565 info->CallerAvailableAllocationUnits =
5566 cpu_to_le64(stfs.f_bavail);
5567 info->ActualAvailableAllocationUnits =
5568 cpu_to_le64(stfs.f_bfree);
5569 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5570 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5571 rsp->OutputBufferLength = cpu_to_le32(32);
5572 break;
5573 }
5574 case FS_OBJECT_ID_INFORMATION:
5575 {
5576 struct object_id_info *info;
5577
5578 info = (struct object_id_info *)(rsp->Buffer);
5579
5580 if (!user_guest(sess->user))
5581 memcpy(info->objid, user_passkey(sess->user), 16);
5582 else
5583 memset(info->objid, 0, 16);
5584
5585 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5586 info->extended_info.version = cpu_to_le32(1);
5587 info->extended_info.release = cpu_to_le32(1);
5588 info->extended_info.rel_date = 0;
5589 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5590 rsp->OutputBufferLength = cpu_to_le32(64);
5591 break;
5592 }
5593 case FS_SECTOR_SIZE_INFORMATION:
5594 {
5595 struct smb3_fs_ss_info *info;
5596 unsigned int sector_size =
5597 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5598
5599 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5600
5601 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5602 info->PhysicalBytesPerSectorForAtomicity =
5603 cpu_to_le32(sector_size);
5604 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5605 info->FSEffPhysicalBytesPerSectorForAtomicity =
5606 cpu_to_le32(sector_size);
5607 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5608 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5609 info->ByteOffsetForSectorAlignment = 0;
5610 info->ByteOffsetForPartitionAlignment = 0;
5611 rsp->OutputBufferLength = cpu_to_le32(28);
5612 break;
5613 }
5614 case FS_CONTROL_INFORMATION:
5615 {
5616 /*
5617 * TODO : The current implementation is based on
5618 * test result with win7(NTFS) server. It's need to
5619 * modify this to get valid Quota values
5620 * from Linux kernel
5621 */
5622 struct smb2_fs_control_info *info;
5623
5624 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5625 info->FreeSpaceStartFiltering = 0;
5626 info->FreeSpaceThreshold = 0;
5627 info->FreeSpaceStopFiltering = 0;
5628 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5629 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5630 info->Padding = 0;
5631 rsp->OutputBufferLength = cpu_to_le32(48);
5632 break;
5633 }
5634 case FS_POSIX_INFORMATION:
5635 {
5636 struct filesystem_posix_info *info;
5637
5638 if (!work->tcon->posix_extensions) {
5639 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5640 path_put(&path);
5641 return -EOPNOTSUPP;
5642 } else {
5643 info = (struct filesystem_posix_info *)(rsp->Buffer);
5644 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5645 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5646 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5647 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5648 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5649 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5650 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5651 rsp->OutputBufferLength = cpu_to_le32(56);
5652 }
5653 break;
5654 }
5655 default:
5656 path_put(&path);
5657 return -EOPNOTSUPP;
5658 }
5659 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5660 rsp, work->response_buf);
5661 path_put(&path);
5662 return rc;
5663 }
5664
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5665 static int smb2_get_info_sec(struct ksmbd_work *work,
5666 struct smb2_query_info_req *req,
5667 struct smb2_query_info_rsp *rsp)
5668 {
5669 struct ksmbd_file *fp;
5670 struct mnt_idmap *idmap;
5671 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5672 struct smb_fattr fattr = {{0}};
5673 struct inode *inode;
5674 __u32 secdesclen = 0;
5675 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5676 int addition_info = le32_to_cpu(req->AdditionalInformation);
5677 int rc = 0, ppntsd_size = 0;
5678
5679 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5680 PROTECTED_DACL_SECINFO |
5681 UNPROTECTED_DACL_SECINFO)) {
5682 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5683 addition_info);
5684
5685 pntsd->revision = cpu_to_le16(1);
5686 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5687 pntsd->osidoffset = 0;
5688 pntsd->gsidoffset = 0;
5689 pntsd->sacloffset = 0;
5690 pntsd->dacloffset = 0;
5691
5692 secdesclen = sizeof(struct smb_ntsd);
5693 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5694
5695 return 0;
5696 }
5697
5698 if (work->next_smb2_rcv_hdr_off) {
5699 if (!has_file_id(req->VolatileFileId)) {
5700 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5701 work->compound_fid);
5702 id = work->compound_fid;
5703 pid = work->compound_pfid;
5704 }
5705 }
5706
5707 if (!has_file_id(id)) {
5708 id = req->VolatileFileId;
5709 pid = req->PersistentFileId;
5710 }
5711
5712 fp = ksmbd_lookup_fd_slow(work, id, pid);
5713 if (!fp)
5714 return -ENOENT;
5715
5716 idmap = file_mnt_idmap(fp->filp);
5717 inode = file_inode(fp->filp);
5718 ksmbd_acls_fattr(&fattr, idmap, inode);
5719
5720 if (test_share_config_flag(work->tcon->share_conf,
5721 KSMBD_SHARE_FLAG_ACL_XATTR))
5722 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5723 fp->filp->f_path.dentry,
5724 &ppntsd);
5725
5726 /* Check if sd buffer size exceeds response buffer size */
5727 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5728 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5729 addition_info, &secdesclen, &fattr);
5730 posix_acl_release(fattr.cf_acls);
5731 posix_acl_release(fattr.cf_dacls);
5732 kfree(ppntsd);
5733 ksmbd_fd_put(work, fp);
5734 if (rc)
5735 return rc;
5736
5737 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5738 return 0;
5739 }
5740
5741 /**
5742 * smb2_query_info() - handler for smb2 query info command
5743 * @work: smb work containing query info request buffer
5744 *
5745 * Return: 0 on success, otherwise error
5746 */
smb2_query_info(struct ksmbd_work * work)5747 int smb2_query_info(struct ksmbd_work *work)
5748 {
5749 struct smb2_query_info_req *req;
5750 struct smb2_query_info_rsp *rsp;
5751 int rc = 0;
5752
5753 ksmbd_debug(SMB, "Received request smb2 query info request\n");
5754
5755 WORK_BUFFERS(work, req, rsp);
5756
5757 if (ksmbd_override_fsids(work)) {
5758 rc = -ENOMEM;
5759 goto err_out;
5760 }
5761
5762 switch (req->InfoType) {
5763 case SMB2_O_INFO_FILE:
5764 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5765 rc = smb2_get_info_file(work, req, rsp);
5766 break;
5767 case SMB2_O_INFO_FILESYSTEM:
5768 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5769 rc = smb2_get_info_filesystem(work, req, rsp);
5770 break;
5771 case SMB2_O_INFO_SECURITY:
5772 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5773 rc = smb2_get_info_sec(work, req, rsp);
5774 break;
5775 default:
5776 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5777 req->InfoType);
5778 rc = -EOPNOTSUPP;
5779 }
5780 ksmbd_revert_fsids(work);
5781
5782 if (!rc) {
5783 rsp->StructureSize = cpu_to_le16(9);
5784 rsp->OutputBufferOffset = cpu_to_le16(72);
5785 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5786 offsetof(struct smb2_query_info_rsp, Buffer) +
5787 le32_to_cpu(rsp->OutputBufferLength));
5788 }
5789
5790 err_out:
5791 if (rc < 0) {
5792 if (rc == -EACCES)
5793 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5794 else if (rc == -ENOENT)
5795 rsp->hdr.Status = STATUS_FILE_CLOSED;
5796 else if (rc == -EIO)
5797 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5798 else if (rc == -ENOMEM)
5799 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5800 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5801 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5802 smb2_set_err_rsp(work);
5803
5804 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5805 rc);
5806 return rc;
5807 }
5808 return 0;
5809 }
5810
5811 /**
5812 * smb2_close_pipe() - handler for closing IPC pipe
5813 * @work: smb work containing close request buffer
5814 *
5815 * Return: 0
5816 */
smb2_close_pipe(struct ksmbd_work * work)5817 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5818 {
5819 u64 id;
5820 struct smb2_close_req *req;
5821 struct smb2_close_rsp *rsp;
5822
5823 WORK_BUFFERS(work, req, rsp);
5824
5825 id = req->VolatileFileId;
5826 ksmbd_session_rpc_close(work->sess, id);
5827
5828 rsp->StructureSize = cpu_to_le16(60);
5829 rsp->Flags = 0;
5830 rsp->Reserved = 0;
5831 rsp->CreationTime = 0;
5832 rsp->LastAccessTime = 0;
5833 rsp->LastWriteTime = 0;
5834 rsp->ChangeTime = 0;
5835 rsp->AllocationSize = 0;
5836 rsp->EndOfFile = 0;
5837 rsp->Attributes = 0;
5838
5839 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5840 sizeof(struct smb2_close_rsp));
5841 }
5842
5843 /**
5844 * smb2_close() - handler for smb2 close file command
5845 * @work: smb work containing close request buffer
5846 *
5847 * Return: 0
5848 */
smb2_close(struct ksmbd_work * work)5849 int smb2_close(struct ksmbd_work *work)
5850 {
5851 u64 volatile_id = KSMBD_NO_FID;
5852 u64 sess_id;
5853 struct smb2_close_req *req;
5854 struct smb2_close_rsp *rsp;
5855 struct ksmbd_conn *conn = work->conn;
5856 struct ksmbd_file *fp;
5857 u64 time;
5858 int err = 0;
5859
5860 ksmbd_debug(SMB, "Received smb2 close request\n");
5861
5862 WORK_BUFFERS(work, req, rsp);
5863
5864 if (test_share_config_flag(work->tcon->share_conf,
5865 KSMBD_SHARE_FLAG_PIPE)) {
5866 ksmbd_debug(SMB, "IPC pipe close request\n");
5867 return smb2_close_pipe(work);
5868 }
5869
5870 sess_id = le64_to_cpu(req->hdr.SessionId);
5871 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5872 sess_id = work->compound_sid;
5873
5874 work->compound_sid = 0;
5875 if (check_session_id(conn, sess_id)) {
5876 work->compound_sid = sess_id;
5877 } else {
5878 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5879 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5880 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5881 err = -EBADF;
5882 goto out;
5883 }
5884
5885 if (work->next_smb2_rcv_hdr_off &&
5886 !has_file_id(req->VolatileFileId)) {
5887 if (!has_file_id(work->compound_fid)) {
5888 /* file already closed, return FILE_CLOSED */
5889 ksmbd_debug(SMB, "file already closed\n");
5890 rsp->hdr.Status = STATUS_FILE_CLOSED;
5891 err = -EBADF;
5892 goto out;
5893 } else {
5894 ksmbd_debug(SMB,
5895 "Compound request set FID = %llu:%llu\n",
5896 work->compound_fid,
5897 work->compound_pfid);
5898 volatile_id = work->compound_fid;
5899
5900 /* file closed, stored id is not valid anymore */
5901 work->compound_fid = KSMBD_NO_FID;
5902 work->compound_pfid = KSMBD_NO_FID;
5903 }
5904 } else {
5905 volatile_id = req->VolatileFileId;
5906 }
5907 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5908
5909 rsp->StructureSize = cpu_to_le16(60);
5910 rsp->Reserved = 0;
5911
5912 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5913 struct kstat stat;
5914 int ret;
5915
5916 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5917 if (!fp) {
5918 err = -ENOENT;
5919 goto out;
5920 }
5921
5922 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5923 AT_STATX_SYNC_AS_STAT);
5924 if (ret) {
5925 ksmbd_fd_put(work, fp);
5926 goto out;
5927 }
5928
5929 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5930 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5931 cpu_to_le64(stat.blocks << 9);
5932 rsp->EndOfFile = cpu_to_le64(stat.size);
5933 rsp->Attributes = fp->f_ci->m_fattr;
5934 rsp->CreationTime = cpu_to_le64(fp->create_time);
5935 time = ksmbd_UnixTimeToNT(stat.atime);
5936 rsp->LastAccessTime = cpu_to_le64(time);
5937 time = ksmbd_UnixTimeToNT(stat.mtime);
5938 rsp->LastWriteTime = cpu_to_le64(time);
5939 time = ksmbd_UnixTimeToNT(stat.ctime);
5940 rsp->ChangeTime = cpu_to_le64(time);
5941 ksmbd_fd_put(work, fp);
5942 } else {
5943 rsp->Flags = 0;
5944 rsp->AllocationSize = 0;
5945 rsp->EndOfFile = 0;
5946 rsp->Attributes = 0;
5947 rsp->CreationTime = 0;
5948 rsp->LastAccessTime = 0;
5949 rsp->LastWriteTime = 0;
5950 rsp->ChangeTime = 0;
5951 }
5952
5953 err = ksmbd_close_fd(work, volatile_id);
5954 out:
5955 if (!err)
5956 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5957 sizeof(struct smb2_close_rsp));
5958
5959 if (err) {
5960 if (rsp->hdr.Status == 0)
5961 rsp->hdr.Status = STATUS_FILE_CLOSED;
5962 smb2_set_err_rsp(work);
5963 }
5964
5965 return err;
5966 }
5967
5968 /**
5969 * smb2_echo() - handler for smb2 echo(ping) command
5970 * @work: smb work containing echo request buffer
5971 *
5972 * Return: 0
5973 */
smb2_echo(struct ksmbd_work * work)5974 int smb2_echo(struct ksmbd_work *work)
5975 {
5976 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5977
5978 ksmbd_debug(SMB, "Received smb2 echo request\n");
5979
5980 if (work->next_smb2_rcv_hdr_off)
5981 rsp = ksmbd_resp_buf_next(work);
5982
5983 rsp->StructureSize = cpu_to_le16(4);
5984 rsp->Reserved = 0;
5985 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5986 }
5987
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5988 static int smb2_rename(struct ksmbd_work *work,
5989 struct ksmbd_file *fp,
5990 struct smb2_file_rename_info *file_info,
5991 struct nls_table *local_nls)
5992 {
5993 struct ksmbd_share_config *share = fp->tcon->share_conf;
5994 char *new_name = NULL;
5995 int rc, flags = 0;
5996
5997 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5998 new_name = smb2_get_name(file_info->FileName,
5999 le32_to_cpu(file_info->FileNameLength),
6000 local_nls);
6001 if (IS_ERR(new_name))
6002 return PTR_ERR(new_name);
6003
6004 if (fp->is_posix_ctxt == false && strchr(new_name, ':')) {
6005 int s_type;
6006 char *xattr_stream_name, *stream_name = NULL;
6007 size_t xattr_stream_size;
6008 int len;
6009
6010 rc = parse_stream_name(new_name, &stream_name, &s_type);
6011 if (rc < 0)
6012 goto out;
6013
6014 len = strlen(new_name);
6015 if (len > 0 && new_name[len - 1] != '/') {
6016 pr_err("not allow base filename in rename\n");
6017 rc = -ESHARE;
6018 goto out;
6019 }
6020
6021 rc = ksmbd_vfs_xattr_stream_name(stream_name,
6022 &xattr_stream_name,
6023 &xattr_stream_size,
6024 s_type);
6025 if (rc)
6026 goto out;
6027
6028 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
6029 &fp->filp->f_path,
6030 xattr_stream_name,
6031 NULL, 0, 0, true);
6032 if (rc < 0) {
6033 pr_err("failed to store stream name in xattr: %d\n",
6034 rc);
6035 rc = -EINVAL;
6036 goto out;
6037 }
6038
6039 goto out;
6040 }
6041
6042 ksmbd_debug(SMB, "new name %s\n", new_name);
6043 if (ksmbd_share_veto_filename(share, new_name)) {
6044 rc = -ENOENT;
6045 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
6046 goto out;
6047 }
6048
6049 if (!file_info->ReplaceIfExists)
6050 flags = RENAME_NOREPLACE;
6051
6052 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
6053 if (!rc)
6054 smb_break_all_levII_oplock(work, fp, 0);
6055 out:
6056 kfree(new_name);
6057 return rc;
6058 }
6059
smb2_create_link(struct ksmbd_work * work,struct ksmbd_share_config * share,struct smb2_file_link_info * file_info,unsigned int buf_len,struct file * filp,struct nls_table * local_nls)6060 static int smb2_create_link(struct ksmbd_work *work,
6061 struct ksmbd_share_config *share,
6062 struct smb2_file_link_info *file_info,
6063 unsigned int buf_len, struct file *filp,
6064 struct nls_table *local_nls)
6065 {
6066 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
6067 struct path path;
6068 int rc;
6069
6070 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
6071 le32_to_cpu(file_info->FileNameLength))
6072 return -EINVAL;
6073
6074 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
6075 pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP);
6076 if (!pathname)
6077 return -ENOMEM;
6078
6079 link_name = smb2_get_name(file_info->FileName,
6080 le32_to_cpu(file_info->FileNameLength),
6081 local_nls);
6082 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
6083 rc = -EINVAL;
6084 goto out;
6085 }
6086
6087 ksmbd_debug(SMB, "link name is %s\n", link_name);
6088 target_name = file_path(filp, pathname, PATH_MAX);
6089 if (IS_ERR(target_name)) {
6090 rc = -EINVAL;
6091 goto out;
6092 }
6093
6094 ksmbd_debug(SMB, "target name is %s\n", target_name);
6095 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
6096 &path, 0);
6097 if (rc) {
6098 if (rc != -ENOENT)
6099 goto out;
6100 } else {
6101 if (file_info->ReplaceIfExists) {
6102 rc = ksmbd_vfs_remove_file(work, &path);
6103 if (rc) {
6104 rc = -EINVAL;
6105 ksmbd_debug(SMB, "cannot delete %s\n",
6106 link_name);
6107 goto out;
6108 }
6109 } else {
6110 rc = -EEXIST;
6111 ksmbd_debug(SMB, "link already exists\n");
6112 goto out;
6113 }
6114 ksmbd_vfs_kern_path_unlock(&path);
6115 }
6116 rc = ksmbd_vfs_link(work, target_name, link_name);
6117 if (rc)
6118 rc = -EINVAL;
6119 out:
6120
6121 if (!IS_ERR(link_name))
6122 kfree(link_name);
6123 kfree(pathname);
6124 return rc;
6125 }
6126
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)6127 static int set_file_basic_info(struct ksmbd_file *fp,
6128 struct smb2_file_basic_info *file_info,
6129 struct ksmbd_share_config *share)
6130 {
6131 struct iattr attrs;
6132 struct file *filp;
6133 struct inode *inode;
6134 struct mnt_idmap *idmap;
6135 int rc = 0;
6136
6137 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
6138 return -EACCES;
6139
6140 attrs.ia_valid = 0;
6141 filp = fp->filp;
6142 inode = file_inode(filp);
6143 idmap = file_mnt_idmap(filp);
6144
6145 if (file_info->CreationTime)
6146 fp->create_time = le64_to_cpu(file_info->CreationTime);
6147
6148 if (file_info->LastAccessTime) {
6149 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
6150 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
6151 }
6152
6153 if (file_info->ChangeTime)
6154 inode_set_ctime_to_ts(inode,
6155 ksmbd_NTtimeToUnix(file_info->ChangeTime));
6156
6157 if (file_info->LastWriteTime) {
6158 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6159 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME);
6160 }
6161
6162 if (file_info->Attributes) {
6163 if (!S_ISDIR(inode->i_mode) &&
6164 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6165 pr_err("can't change a file to a directory\n");
6166 return -EINVAL;
6167 }
6168
6169 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6170 fp->f_ci->m_fattr = file_info->Attributes |
6171 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6172 }
6173
6174 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6175 (file_info->CreationTime || file_info->Attributes)) {
6176 struct xattr_dos_attrib da = {0};
6177
6178 da.version = 4;
6179 da.itime = fp->itime;
6180 da.create_time = fp->create_time;
6181 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6182 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6183 XATTR_DOSINFO_ITIME;
6184
6185 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6186 true);
6187 if (rc)
6188 ksmbd_debug(SMB,
6189 "failed to restore file attribute in EA\n");
6190 rc = 0;
6191 }
6192
6193 if (attrs.ia_valid) {
6194 struct dentry *dentry = filp->f_path.dentry;
6195 struct inode *inode = d_inode(dentry);
6196
6197 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6198 return -EACCES;
6199
6200 inode_lock(inode);
6201 rc = notify_change(idmap, dentry, &attrs, NULL);
6202 inode_unlock(inode);
6203 }
6204 return rc;
6205 }
6206
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6207 static int set_file_allocation_info(struct ksmbd_work *work,
6208 struct ksmbd_file *fp,
6209 struct smb2_file_alloc_info *file_alloc_info)
6210 {
6211 /*
6212 * TODO : It's working fine only when store dos attributes
6213 * is not yes. need to implement a logic which works
6214 * properly with any smb.conf option
6215 */
6216
6217 loff_t alloc_blks;
6218 struct inode *inode;
6219 struct kstat stat;
6220 int rc;
6221
6222 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6223 return -EACCES;
6224
6225 if (ksmbd_stream_fd(fp) == true)
6226 return 0;
6227
6228 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6229 AT_STATX_SYNC_AS_STAT);
6230 if (rc)
6231 return rc;
6232
6233 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6234 inode = file_inode(fp->filp);
6235
6236 if (alloc_blks > stat.blocks) {
6237 smb_break_all_levII_oplock(work, fp, 1);
6238 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6239 alloc_blks * 512);
6240 if (rc && rc != -EOPNOTSUPP) {
6241 pr_err("vfs_fallocate is failed : %d\n", rc);
6242 return rc;
6243 }
6244 } else if (alloc_blks < stat.blocks) {
6245 loff_t size;
6246
6247 /*
6248 * Allocation size could be smaller than original one
6249 * which means allocated blocks in file should be
6250 * deallocated. use truncate to cut out it, but inode
6251 * size is also updated with truncate offset.
6252 * inode size is retained by backup inode size.
6253 */
6254 size = i_size_read(inode);
6255 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6256 if (rc) {
6257 pr_err("truncate failed!, err %d\n", rc);
6258 return rc;
6259 }
6260 if (size < alloc_blks * 512)
6261 i_size_write(inode, size);
6262 }
6263 return 0;
6264 }
6265
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6266 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6267 struct smb2_file_eof_info *file_eof_info)
6268 {
6269 loff_t newsize;
6270 struct inode *inode;
6271 int rc;
6272
6273 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6274 return -EACCES;
6275
6276 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6277 inode = file_inode(fp->filp);
6278
6279 /*
6280 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6281 * on FAT32 shared device, truncate execution time is too long
6282 * and network error could cause from windows client. because
6283 * truncate of some filesystem like FAT32 fill zero data in
6284 * truncated range.
6285 */
6286 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC &&
6287 ksmbd_stream_fd(fp) == false) {
6288 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6289 rc = ksmbd_vfs_truncate(work, fp, newsize);
6290 if (rc) {
6291 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6292 if (rc != -EAGAIN)
6293 rc = -EBADF;
6294 return rc;
6295 }
6296 }
6297 return 0;
6298 }
6299
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6300 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6301 struct smb2_file_rename_info *rename_info,
6302 unsigned int buf_len)
6303 {
6304 if (!(fp->daccess & FILE_DELETE_LE)) {
6305 pr_err("no right to delete : 0x%x\n", fp->daccess);
6306 return -EACCES;
6307 }
6308
6309 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6310 le32_to_cpu(rename_info->FileNameLength))
6311 return -EINVAL;
6312
6313 if (!le32_to_cpu(rename_info->FileNameLength))
6314 return -EINVAL;
6315
6316 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6317 }
6318
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6319 static int set_file_disposition_info(struct ksmbd_file *fp,
6320 struct smb2_file_disposition_info *file_info)
6321 {
6322 struct inode *inode;
6323
6324 if (!(fp->daccess & FILE_DELETE_LE)) {
6325 pr_err("no right to delete : 0x%x\n", fp->daccess);
6326 return -EACCES;
6327 }
6328
6329 inode = file_inode(fp->filp);
6330 if (file_info->DeletePending) {
6331 if (S_ISDIR(inode->i_mode) &&
6332 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6333 return -EBUSY;
6334 ksmbd_set_inode_pending_delete(fp);
6335 } else {
6336 ksmbd_clear_inode_pending_delete(fp);
6337 }
6338 return 0;
6339 }
6340
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6341 static int set_file_position_info(struct ksmbd_file *fp,
6342 struct smb2_file_pos_info *file_info)
6343 {
6344 loff_t current_byte_offset;
6345 unsigned long sector_size;
6346 struct inode *inode;
6347
6348 inode = file_inode(fp->filp);
6349 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6350 sector_size = inode->i_sb->s_blocksize;
6351
6352 if (current_byte_offset < 0 ||
6353 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6354 current_byte_offset & (sector_size - 1))) {
6355 pr_err("CurrentByteOffset is not valid : %llu\n",
6356 current_byte_offset);
6357 return -EINVAL;
6358 }
6359
6360 if (ksmbd_stream_fd(fp) == false)
6361 fp->filp->f_pos = current_byte_offset;
6362 else {
6363 if (current_byte_offset > XATTR_SIZE_MAX)
6364 current_byte_offset = XATTR_SIZE_MAX;
6365 fp->stream.pos = current_byte_offset;
6366 }
6367 return 0;
6368 }
6369
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6370 static int set_file_mode_info(struct ksmbd_file *fp,
6371 struct smb2_file_mode_info *file_info)
6372 {
6373 __le32 mode;
6374
6375 mode = file_info->Mode;
6376
6377 if ((mode & ~FILE_MODE_INFO_MASK)) {
6378 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6379 return -EINVAL;
6380 }
6381
6382 /*
6383 * TODO : need to implement consideration for
6384 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6385 */
6386 ksmbd_vfs_set_fadvise(fp->filp, mode);
6387 fp->coption = mode;
6388 return 0;
6389 }
6390
6391 /**
6392 * smb2_set_info_file() - handler for smb2 set info command
6393 * @work: smb work containing set info command buffer
6394 * @fp: ksmbd_file pointer
6395 * @req: request buffer pointer
6396 * @share: ksmbd_share_config pointer
6397 *
6398 * Return: 0 on success, otherwise error
6399 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6400 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6401 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6402 struct smb2_set_info_req *req,
6403 struct ksmbd_share_config *share)
6404 {
6405 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6406 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6407
6408 switch (req->FileInfoClass) {
6409 case FILE_BASIC_INFORMATION:
6410 {
6411 if (buf_len < sizeof(struct smb2_file_basic_info))
6412 return -EINVAL;
6413
6414 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6415 }
6416 case FILE_ALLOCATION_INFORMATION:
6417 {
6418 if (buf_len < sizeof(struct smb2_file_alloc_info))
6419 return -EINVAL;
6420
6421 return set_file_allocation_info(work, fp,
6422 (struct smb2_file_alloc_info *)buffer);
6423 }
6424 case FILE_END_OF_FILE_INFORMATION:
6425 {
6426 if (buf_len < sizeof(struct smb2_file_eof_info))
6427 return -EINVAL;
6428
6429 return set_end_of_file_info(work, fp,
6430 (struct smb2_file_eof_info *)buffer);
6431 }
6432 case FILE_RENAME_INFORMATION:
6433 {
6434 if (buf_len < sizeof(struct smb2_file_rename_info))
6435 return -EINVAL;
6436
6437 return set_rename_info(work, fp,
6438 (struct smb2_file_rename_info *)buffer,
6439 buf_len);
6440 }
6441 case FILE_LINK_INFORMATION:
6442 {
6443 if (buf_len < sizeof(struct smb2_file_link_info))
6444 return -EINVAL;
6445
6446 return smb2_create_link(work, work->tcon->share_conf,
6447 (struct smb2_file_link_info *)buffer,
6448 buf_len, fp->filp,
6449 work->conn->local_nls);
6450 }
6451 case FILE_DISPOSITION_INFORMATION:
6452 {
6453 if (buf_len < sizeof(struct smb2_file_disposition_info))
6454 return -EINVAL;
6455
6456 return set_file_disposition_info(fp,
6457 (struct smb2_file_disposition_info *)buffer);
6458 }
6459 case FILE_FULL_EA_INFORMATION:
6460 {
6461 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6462 pr_err("Not permitted to write ext attr: 0x%x\n",
6463 fp->daccess);
6464 return -EACCES;
6465 }
6466
6467 if (buf_len < sizeof(struct smb2_ea_info))
6468 return -EINVAL;
6469
6470 return smb2_set_ea((struct smb2_ea_info *)buffer,
6471 buf_len, &fp->filp->f_path, true);
6472 }
6473 case FILE_POSITION_INFORMATION:
6474 {
6475 if (buf_len < sizeof(struct smb2_file_pos_info))
6476 return -EINVAL;
6477
6478 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6479 }
6480 case FILE_MODE_INFORMATION:
6481 {
6482 if (buf_len < sizeof(struct smb2_file_mode_info))
6483 return -EINVAL;
6484
6485 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6486 }
6487 }
6488
6489 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6490 return -EOPNOTSUPP;
6491 }
6492
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6493 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6494 char *buffer, int buf_len)
6495 {
6496 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6497
6498 fp->saccess |= FILE_SHARE_DELETE_LE;
6499
6500 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6501 buf_len, false, true);
6502 }
6503
6504 /**
6505 * smb2_set_info() - handler for smb2 set info command handler
6506 * @work: smb work containing set info request buffer
6507 *
6508 * Return: 0 on success, otherwise error
6509 */
smb2_set_info(struct ksmbd_work * work)6510 int smb2_set_info(struct ksmbd_work *work)
6511 {
6512 struct smb2_set_info_req *req;
6513 struct smb2_set_info_rsp *rsp;
6514 struct ksmbd_file *fp = NULL;
6515 int rc = 0;
6516 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6517
6518 ksmbd_debug(SMB, "Received smb2 set info request\n");
6519
6520 if (work->next_smb2_rcv_hdr_off) {
6521 req = ksmbd_req_buf_next(work);
6522 rsp = ksmbd_resp_buf_next(work);
6523 if (!has_file_id(req->VolatileFileId)) {
6524 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6525 work->compound_fid);
6526 id = work->compound_fid;
6527 pid = work->compound_pfid;
6528 }
6529 } else {
6530 req = smb2_get_msg(work->request_buf);
6531 rsp = smb2_get_msg(work->response_buf);
6532 }
6533
6534 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6535 ksmbd_debug(SMB, "User does not have write permission\n");
6536 pr_err("User does not have write permission\n");
6537 rc = -EACCES;
6538 goto err_out;
6539 }
6540
6541 if (!has_file_id(id)) {
6542 id = req->VolatileFileId;
6543 pid = req->PersistentFileId;
6544 }
6545
6546 fp = ksmbd_lookup_fd_slow(work, id, pid);
6547 if (!fp) {
6548 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6549 rc = -ENOENT;
6550 goto err_out;
6551 }
6552
6553 switch (req->InfoType) {
6554 case SMB2_O_INFO_FILE:
6555 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6556 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6557 break;
6558 case SMB2_O_INFO_SECURITY:
6559 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6560 if (ksmbd_override_fsids(work)) {
6561 rc = -ENOMEM;
6562 goto err_out;
6563 }
6564 rc = smb2_set_info_sec(fp,
6565 le32_to_cpu(req->AdditionalInformation),
6566 (char *)req + le16_to_cpu(req->BufferOffset),
6567 le32_to_cpu(req->BufferLength));
6568 ksmbd_revert_fsids(work);
6569 break;
6570 default:
6571 rc = -EOPNOTSUPP;
6572 }
6573
6574 if (rc < 0)
6575 goto err_out;
6576
6577 rsp->StructureSize = cpu_to_le16(2);
6578 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6579 sizeof(struct smb2_set_info_rsp));
6580 if (rc)
6581 goto err_out;
6582 ksmbd_fd_put(work, fp);
6583 return 0;
6584
6585 err_out:
6586 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6587 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6588 else if (rc == -EINVAL)
6589 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6590 else if (rc == -ESHARE)
6591 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6592 else if (rc == -ENOENT)
6593 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6594 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6595 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6596 else if (rc == -EAGAIN)
6597 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6598 else if (rc == -EBADF || rc == -ESTALE)
6599 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6600 else if (rc == -EEXIST)
6601 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6602 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6603 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6604 smb2_set_err_rsp(work);
6605 ksmbd_fd_put(work, fp);
6606 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6607 return rc;
6608 }
6609
6610 /**
6611 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6612 * @work: smb work containing read IPC pipe command buffer
6613 *
6614 * Return: 0 on success, otherwise error
6615 */
smb2_read_pipe(struct ksmbd_work * work)6616 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6617 {
6618 int nbytes = 0, err;
6619 u64 id;
6620 struct ksmbd_rpc_command *rpc_resp;
6621 struct smb2_read_req *req;
6622 struct smb2_read_rsp *rsp;
6623
6624 WORK_BUFFERS(work, req, rsp);
6625
6626 id = req->VolatileFileId;
6627
6628 rpc_resp = ksmbd_rpc_read(work->sess, id);
6629 if (rpc_resp) {
6630 void *aux_payload_buf;
6631
6632 if (rpc_resp->flags != KSMBD_RPC_OK) {
6633 err = -EINVAL;
6634 goto out;
6635 }
6636
6637 aux_payload_buf =
6638 kvmalloc(rpc_resp->payload_sz, KSMBD_DEFAULT_GFP);
6639 if (!aux_payload_buf) {
6640 err = -ENOMEM;
6641 goto out;
6642 }
6643
6644 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6645
6646 nbytes = rpc_resp->payload_sz;
6647 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6648 offsetof(struct smb2_read_rsp, Buffer),
6649 aux_payload_buf, nbytes);
6650 if (err) {
6651 kvfree(aux_payload_buf);
6652 goto out;
6653 }
6654 kvfree(rpc_resp);
6655 } else {
6656 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6657 offsetof(struct smb2_read_rsp, Buffer));
6658 if (err)
6659 goto out;
6660 }
6661
6662 rsp->StructureSize = cpu_to_le16(17);
6663 rsp->DataOffset = 80;
6664 rsp->Reserved = 0;
6665 rsp->DataLength = cpu_to_le32(nbytes);
6666 rsp->DataRemaining = 0;
6667 rsp->Flags = 0;
6668 return 0;
6669
6670 out:
6671 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6672 smb2_set_err_rsp(work);
6673 kvfree(rpc_resp);
6674 return err;
6675 }
6676
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smbdirect_buffer_descriptor_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6677 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6678 struct smbdirect_buffer_descriptor_v1 *desc,
6679 __le32 Channel,
6680 __le16 ChannelInfoLength)
6681 {
6682 unsigned int i, ch_count;
6683
6684 if (work->conn->dialect == SMB30_PROT_ID &&
6685 Channel != SMB2_CHANNEL_RDMA_V1)
6686 return -EINVAL;
6687
6688 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6689 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6690 for (i = 0; i < ch_count; i++) {
6691 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6692 i,
6693 le32_to_cpu(desc[i].token),
6694 le32_to_cpu(desc[i].length));
6695 }
6696 }
6697 if (!ch_count)
6698 return -EINVAL;
6699
6700 work->need_invalidate_rkey =
6701 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6702 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6703 work->remote_key = le32_to_cpu(desc->token);
6704 return 0;
6705 }
6706
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6707 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6708 struct smb2_read_req *req, void *data_buf,
6709 size_t length)
6710 {
6711 int err;
6712
6713 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6714 (struct smbdirect_buffer_descriptor_v1 *)
6715 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6716 le16_to_cpu(req->ReadChannelInfoLength));
6717 if (err)
6718 return err;
6719
6720 return length;
6721 }
6722
6723 /**
6724 * smb2_read() - handler for smb2 read from file
6725 * @work: smb work containing read command buffer
6726 *
6727 * Return: 0 on success, otherwise error
6728 */
smb2_read(struct ksmbd_work * work)6729 int smb2_read(struct ksmbd_work *work)
6730 {
6731 struct ksmbd_conn *conn = work->conn;
6732 struct smb2_read_req *req;
6733 struct smb2_read_rsp *rsp;
6734 struct ksmbd_file *fp = NULL;
6735 loff_t offset;
6736 size_t length, mincount;
6737 ssize_t nbytes = 0, remain_bytes = 0;
6738 int err = 0;
6739 bool is_rdma_channel = false;
6740 unsigned int max_read_size = conn->vals->max_read_size;
6741 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6742 void *aux_payload_buf;
6743
6744 ksmbd_debug(SMB, "Received smb2 read request\n");
6745
6746 if (test_share_config_flag(work->tcon->share_conf,
6747 KSMBD_SHARE_FLAG_PIPE)) {
6748 ksmbd_debug(SMB, "IPC pipe read request\n");
6749 return smb2_read_pipe(work);
6750 }
6751
6752 if (work->next_smb2_rcv_hdr_off) {
6753 req = ksmbd_req_buf_next(work);
6754 rsp = ksmbd_resp_buf_next(work);
6755 if (!has_file_id(req->VolatileFileId)) {
6756 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6757 work->compound_fid);
6758 id = work->compound_fid;
6759 pid = work->compound_pfid;
6760 }
6761 } else {
6762 req = smb2_get_msg(work->request_buf);
6763 rsp = smb2_get_msg(work->response_buf);
6764 }
6765
6766 if (!has_file_id(id)) {
6767 id = req->VolatileFileId;
6768 pid = req->PersistentFileId;
6769 }
6770
6771 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6772 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6773 is_rdma_channel = true;
6774 max_read_size = get_smbd_max_read_write_size(work->conn->transport);
6775 if (max_read_size == 0) {
6776 err = -EINVAL;
6777 goto out;
6778 }
6779 }
6780
6781 if (is_rdma_channel == true) {
6782 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6783
6784 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6785 err = -EINVAL;
6786 goto out;
6787 }
6788 err = smb2_set_remote_key_for_rdma(work,
6789 (struct smbdirect_buffer_descriptor_v1 *)
6790 ((char *)req + ch_offset),
6791 req->Channel,
6792 req->ReadChannelInfoLength);
6793 if (err)
6794 goto out;
6795 }
6796
6797 fp = ksmbd_lookup_fd_slow(work, id, pid);
6798 if (!fp) {
6799 err = -ENOENT;
6800 goto out;
6801 }
6802
6803 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6804 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6805 err = -EACCES;
6806 goto out;
6807 }
6808
6809 offset = le64_to_cpu(req->Offset);
6810 if (offset < 0) {
6811 err = -EINVAL;
6812 goto out;
6813 }
6814 length = le32_to_cpu(req->Length);
6815 mincount = le32_to_cpu(req->MinimumCount);
6816
6817 if (length > max_read_size) {
6818 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6819 max_read_size);
6820 err = -EINVAL;
6821 goto out;
6822 }
6823
6824 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6825 fp->filp, offset, length);
6826
6827 aux_payload_buf = kvzalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP);
6828 if (!aux_payload_buf) {
6829 err = -ENOMEM;
6830 goto out;
6831 }
6832
6833 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6834 if (nbytes < 0) {
6835 kvfree(aux_payload_buf);
6836 err = nbytes;
6837 goto out;
6838 }
6839
6840 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6841 kvfree(aux_payload_buf);
6842 rsp->hdr.Status = STATUS_END_OF_FILE;
6843 smb2_set_err_rsp(work);
6844 ksmbd_fd_put(work, fp);
6845 return 0;
6846 }
6847
6848 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6849 nbytes, offset, mincount);
6850
6851 if (is_rdma_channel == true) {
6852 /* write data to the client using rdma channel */
6853 remain_bytes = smb2_read_rdma_channel(work, req,
6854 aux_payload_buf,
6855 nbytes);
6856 kvfree(aux_payload_buf);
6857 aux_payload_buf = NULL;
6858 nbytes = 0;
6859 if (remain_bytes < 0) {
6860 err = (int)remain_bytes;
6861 goto out;
6862 }
6863 }
6864
6865 rsp->StructureSize = cpu_to_le16(17);
6866 rsp->DataOffset = 80;
6867 rsp->Reserved = 0;
6868 rsp->DataLength = cpu_to_le32(nbytes);
6869 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6870 rsp->Flags = 0;
6871 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6872 offsetof(struct smb2_read_rsp, Buffer),
6873 aux_payload_buf, nbytes);
6874 if (err) {
6875 kvfree(aux_payload_buf);
6876 goto out;
6877 }
6878 ksmbd_fd_put(work, fp);
6879 return 0;
6880
6881 out:
6882 if (err) {
6883 if (err == -EISDIR)
6884 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6885 else if (err == -EAGAIN)
6886 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6887 else if (err == -ENOENT)
6888 rsp->hdr.Status = STATUS_FILE_CLOSED;
6889 else if (err == -EACCES)
6890 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6891 else if (err == -ESHARE)
6892 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6893 else if (err == -EINVAL)
6894 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6895 else
6896 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6897
6898 smb2_set_err_rsp(work);
6899 }
6900 ksmbd_fd_put(work, fp);
6901 return err;
6902 }
6903
6904 /**
6905 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6906 * @work: smb work containing write IPC pipe command buffer
6907 *
6908 * Return: 0 on success, otherwise error
6909 */
smb2_write_pipe(struct ksmbd_work * work)6910 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6911 {
6912 struct smb2_write_req *req;
6913 struct smb2_write_rsp *rsp;
6914 struct ksmbd_rpc_command *rpc_resp;
6915 u64 id = 0;
6916 int err = 0, ret = 0;
6917 char *data_buf;
6918 size_t length;
6919
6920 WORK_BUFFERS(work, req, rsp);
6921
6922 length = le32_to_cpu(req->Length);
6923 id = req->VolatileFileId;
6924
6925 if ((u64)le16_to_cpu(req->DataOffset) + length >
6926 get_rfc1002_len(work->request_buf)) {
6927 pr_err("invalid write data offset %u, smb_len %u\n",
6928 le16_to_cpu(req->DataOffset),
6929 get_rfc1002_len(work->request_buf));
6930 err = -EINVAL;
6931 goto out;
6932 }
6933
6934 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6935 le16_to_cpu(req->DataOffset));
6936
6937 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6938 if (rpc_resp) {
6939 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6940 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6941 kvfree(rpc_resp);
6942 smb2_set_err_rsp(work);
6943 return -EOPNOTSUPP;
6944 }
6945 if (rpc_resp->flags != KSMBD_RPC_OK) {
6946 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6947 smb2_set_err_rsp(work);
6948 kvfree(rpc_resp);
6949 return ret;
6950 }
6951 kvfree(rpc_resp);
6952 }
6953
6954 rsp->StructureSize = cpu_to_le16(17);
6955 rsp->DataOffset = 0;
6956 rsp->Reserved = 0;
6957 rsp->DataLength = cpu_to_le32(length);
6958 rsp->DataRemaining = 0;
6959 rsp->Reserved2 = 0;
6960 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6961 offsetof(struct smb2_write_rsp, Buffer));
6962 out:
6963 if (err) {
6964 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6965 smb2_set_err_rsp(work);
6966 }
6967
6968 return err;
6969 }
6970
smb2_write_rdma_channel(struct ksmbd_work * work,struct smb2_write_req * req,struct ksmbd_file * fp,loff_t offset,size_t length,bool sync)6971 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6972 struct smb2_write_req *req,
6973 struct ksmbd_file *fp,
6974 loff_t offset, size_t length, bool sync)
6975 {
6976 char *data_buf;
6977 int ret;
6978 ssize_t nbytes;
6979
6980 data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP);
6981 if (!data_buf)
6982 return -ENOMEM;
6983
6984 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6985 (struct smbdirect_buffer_descriptor_v1 *)
6986 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6987 le16_to_cpu(req->WriteChannelInfoLength));
6988 if (ret < 0) {
6989 kvfree(data_buf);
6990 return ret;
6991 }
6992
6993 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6994 kvfree(data_buf);
6995 if (ret < 0)
6996 return ret;
6997
6998 return nbytes;
6999 }
7000
7001 /**
7002 * smb2_write() - handler for smb2 write from file
7003 * @work: smb work containing write command buffer
7004 *
7005 * Return: 0 on success, otherwise error
7006 */
smb2_write(struct ksmbd_work * work)7007 int smb2_write(struct ksmbd_work *work)
7008 {
7009 struct smb2_write_req *req;
7010 struct smb2_write_rsp *rsp;
7011 struct ksmbd_file *fp = NULL;
7012 loff_t offset;
7013 size_t length;
7014 ssize_t nbytes;
7015 char *data_buf;
7016 bool writethrough = false, is_rdma_channel = false;
7017 int err = 0;
7018 unsigned int max_write_size = work->conn->vals->max_write_size;
7019
7020 ksmbd_debug(SMB, "Received smb2 write request\n");
7021
7022 WORK_BUFFERS(work, req, rsp);
7023
7024 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
7025 ksmbd_debug(SMB, "IPC pipe write request\n");
7026 return smb2_write_pipe(work);
7027 }
7028
7029 offset = le64_to_cpu(req->Offset);
7030 if (offset < 0)
7031 return -EINVAL;
7032 length = le32_to_cpu(req->Length);
7033
7034 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
7035 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
7036 is_rdma_channel = true;
7037 max_write_size = get_smbd_max_read_write_size(work->conn->transport);
7038 if (max_write_size == 0) {
7039 err = -EINVAL;
7040 goto out;
7041 }
7042 length = le32_to_cpu(req->RemainingBytes);
7043 }
7044
7045 if (is_rdma_channel == true) {
7046 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
7047
7048 if (req->Length != 0 || req->DataOffset != 0 ||
7049 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
7050 err = -EINVAL;
7051 goto out;
7052 }
7053 err = smb2_set_remote_key_for_rdma(work,
7054 (struct smbdirect_buffer_descriptor_v1 *)
7055 ((char *)req + ch_offset),
7056 req->Channel,
7057 req->WriteChannelInfoLength);
7058 if (err)
7059 goto out;
7060 }
7061
7062 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7063 ksmbd_debug(SMB, "User does not have write permission\n");
7064 err = -EACCES;
7065 goto out;
7066 }
7067
7068 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7069 if (!fp) {
7070 err = -ENOENT;
7071 goto out;
7072 }
7073
7074 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
7075 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
7076 err = -EACCES;
7077 goto out;
7078 }
7079
7080 if (length > max_write_size) {
7081 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
7082 max_write_size);
7083 err = -EINVAL;
7084 goto out;
7085 }
7086
7087 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
7088 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
7089 writethrough = true;
7090
7091 if (is_rdma_channel == false) {
7092 if (le16_to_cpu(req->DataOffset) <
7093 offsetof(struct smb2_write_req, Buffer)) {
7094 err = -EINVAL;
7095 goto out;
7096 }
7097
7098 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
7099 le16_to_cpu(req->DataOffset));
7100
7101 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
7102 fp->filp, offset, length);
7103 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
7104 writethrough, &nbytes);
7105 if (err < 0)
7106 goto out;
7107 } else {
7108 /* read data from the client using rdma channel, and
7109 * write the data.
7110 */
7111 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
7112 writethrough);
7113 if (nbytes < 0) {
7114 err = (int)nbytes;
7115 goto out;
7116 }
7117 }
7118
7119 rsp->StructureSize = cpu_to_le16(17);
7120 rsp->DataOffset = 0;
7121 rsp->Reserved = 0;
7122 rsp->DataLength = cpu_to_le32(nbytes);
7123 rsp->DataRemaining = 0;
7124 rsp->Reserved2 = 0;
7125 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
7126 if (err)
7127 goto out;
7128 ksmbd_fd_put(work, fp);
7129 return 0;
7130
7131 out:
7132 if (err == -EAGAIN)
7133 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7134 else if (err == -ENOSPC || err == -EFBIG)
7135 rsp->hdr.Status = STATUS_DISK_FULL;
7136 else if (err == -ENOENT)
7137 rsp->hdr.Status = STATUS_FILE_CLOSED;
7138 else if (err == -EACCES)
7139 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7140 else if (err == -ESHARE)
7141 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
7142 else if (err == -EINVAL)
7143 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7144 else
7145 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7146
7147 smb2_set_err_rsp(work);
7148 ksmbd_fd_put(work, fp);
7149 return err;
7150 }
7151
7152 /**
7153 * smb2_flush() - handler for smb2 flush file - fsync
7154 * @work: smb work containing flush command buffer
7155 *
7156 * Return: 0 on success, otherwise error
7157 */
smb2_flush(struct ksmbd_work * work)7158 int smb2_flush(struct ksmbd_work *work)
7159 {
7160 struct smb2_flush_req *req;
7161 struct smb2_flush_rsp *rsp;
7162 int err;
7163
7164 WORK_BUFFERS(work, req, rsp);
7165
7166 ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId);
7167
7168 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
7169 if (err)
7170 goto out;
7171
7172 rsp->StructureSize = cpu_to_le16(4);
7173 rsp->Reserved = 0;
7174 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
7175
7176 out:
7177 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7178 smb2_set_err_rsp(work);
7179 return err;
7180 }
7181
7182 /**
7183 * smb2_cancel() - handler for smb2 cancel command
7184 * @work: smb work containing cancel command buffer
7185 *
7186 * Return: 0 on success, otherwise error
7187 */
smb2_cancel(struct ksmbd_work * work)7188 int smb2_cancel(struct ksmbd_work *work)
7189 {
7190 struct ksmbd_conn *conn = work->conn;
7191 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7192 struct smb2_hdr *chdr;
7193 struct ksmbd_work *iter;
7194 struct list_head *command_list;
7195
7196 if (work->next_smb2_rcv_hdr_off)
7197 hdr = ksmbd_resp_buf_next(work);
7198
7199 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7200 hdr->MessageId, hdr->Flags);
7201
7202 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7203 command_list = &conn->async_requests;
7204
7205 spin_lock(&conn->request_lock);
7206 list_for_each_entry(iter, command_list,
7207 async_request_entry) {
7208 chdr = smb2_get_msg(iter->request_buf);
7209
7210 if (iter->async_id !=
7211 le64_to_cpu(hdr->Id.AsyncId))
7212 continue;
7213
7214 ksmbd_debug(SMB,
7215 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7216 le64_to_cpu(hdr->Id.AsyncId),
7217 le16_to_cpu(chdr->Command));
7218 iter->state = KSMBD_WORK_CANCELLED;
7219 if (iter->cancel_fn)
7220 iter->cancel_fn(iter->cancel_argv);
7221 break;
7222 }
7223 spin_unlock(&conn->request_lock);
7224 } else {
7225 command_list = &conn->requests;
7226
7227 spin_lock(&conn->request_lock);
7228 list_for_each_entry(iter, command_list, request_entry) {
7229 chdr = smb2_get_msg(iter->request_buf);
7230
7231 if (chdr->MessageId != hdr->MessageId ||
7232 iter == work)
7233 continue;
7234
7235 ksmbd_debug(SMB,
7236 "smb2 with mid %llu cancelled command = 0x%x\n",
7237 le64_to_cpu(hdr->MessageId),
7238 le16_to_cpu(chdr->Command));
7239 iter->state = KSMBD_WORK_CANCELLED;
7240 break;
7241 }
7242 spin_unlock(&conn->request_lock);
7243 }
7244
7245 /* For SMB2_CANCEL command itself send no response*/
7246 work->send_no_response = 1;
7247 return 0;
7248 }
7249
smb_flock_init(struct file * f)7250 struct file_lock *smb_flock_init(struct file *f)
7251 {
7252 struct file_lock *fl;
7253
7254 fl = locks_alloc_lock();
7255 if (!fl)
7256 goto out;
7257
7258 locks_init_lock(fl);
7259
7260 fl->c.flc_owner = f;
7261 fl->c.flc_pid = current->tgid;
7262 fl->c.flc_file = f;
7263 fl->c.flc_flags = FL_POSIX;
7264 fl->fl_ops = NULL;
7265 fl->fl_lmops = NULL;
7266
7267 out:
7268 return fl;
7269 }
7270
smb2_set_flock_flags(struct file_lock * flock,int flags)7271 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7272 {
7273 int cmd = -EINVAL;
7274
7275 /* Checking for wrong flag combination during lock request*/
7276 switch (flags) {
7277 case SMB2_LOCKFLAG_SHARED:
7278 ksmbd_debug(SMB, "received shared request\n");
7279 cmd = F_SETLKW;
7280 flock->c.flc_type = F_RDLCK;
7281 flock->c.flc_flags |= FL_SLEEP;
7282 break;
7283 case SMB2_LOCKFLAG_EXCLUSIVE:
7284 ksmbd_debug(SMB, "received exclusive request\n");
7285 cmd = F_SETLKW;
7286 flock->c.flc_type = F_WRLCK;
7287 flock->c.flc_flags |= FL_SLEEP;
7288 break;
7289 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7290 ksmbd_debug(SMB,
7291 "received shared & fail immediately request\n");
7292 cmd = F_SETLK;
7293 flock->c.flc_type = F_RDLCK;
7294 break;
7295 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7296 ksmbd_debug(SMB,
7297 "received exclusive & fail immediately request\n");
7298 cmd = F_SETLK;
7299 flock->c.flc_type = F_WRLCK;
7300 break;
7301 case SMB2_LOCKFLAG_UNLOCK:
7302 ksmbd_debug(SMB, "received unlock request\n");
7303 flock->c.flc_type = F_UNLCK;
7304 cmd = F_SETLK;
7305 break;
7306 }
7307
7308 return cmd;
7309 }
7310
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7311 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7312 unsigned int cmd, int flags,
7313 struct list_head *lock_list)
7314 {
7315 struct ksmbd_lock *lock;
7316
7317 lock = kzalloc(sizeof(struct ksmbd_lock), KSMBD_DEFAULT_GFP);
7318 if (!lock)
7319 return NULL;
7320
7321 lock->cmd = cmd;
7322 lock->fl = flock;
7323 lock->start = flock->fl_start;
7324 lock->end = flock->fl_end;
7325 lock->flags = flags;
7326 if (lock->start == lock->end)
7327 lock->zero_len = 1;
7328 INIT_LIST_HEAD(&lock->clist);
7329 INIT_LIST_HEAD(&lock->flist);
7330 INIT_LIST_HEAD(&lock->llist);
7331 list_add_tail(&lock->llist, lock_list);
7332
7333 return lock;
7334 }
7335
smb2_remove_blocked_lock(void ** argv)7336 static void smb2_remove_blocked_lock(void **argv)
7337 {
7338 struct file_lock *flock = (struct file_lock *)argv[0];
7339
7340 ksmbd_vfs_posix_lock_unblock(flock);
7341 locks_wake_up(flock);
7342 }
7343
lock_defer_pending(struct file_lock * fl)7344 static inline bool lock_defer_pending(struct file_lock *fl)
7345 {
7346 /* check pending lock waiters */
7347 return waitqueue_active(&fl->c.flc_wait);
7348 }
7349
7350 /**
7351 * smb2_lock() - handler for smb2 file lock command
7352 * @work: smb work containing lock command buffer
7353 *
7354 * Return: 0 on success, otherwise error
7355 */
smb2_lock(struct ksmbd_work * work)7356 int smb2_lock(struct ksmbd_work *work)
7357 {
7358 struct smb2_lock_req *req;
7359 struct smb2_lock_rsp *rsp;
7360 struct smb2_lock_element *lock_ele;
7361 struct ksmbd_file *fp = NULL;
7362 struct file_lock *flock = NULL;
7363 struct file *filp = NULL;
7364 int lock_count;
7365 int flags = 0;
7366 int cmd = 0;
7367 int err = -EIO, i, rc = 0;
7368 u64 lock_start, lock_length;
7369 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7370 struct ksmbd_conn *conn;
7371 int nolock = 0;
7372 LIST_HEAD(lock_list);
7373 LIST_HEAD(rollback_list);
7374 int prior_lock = 0, bkt;
7375
7376 WORK_BUFFERS(work, req, rsp);
7377
7378 ksmbd_debug(SMB, "Received smb2 lock request\n");
7379 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7380 if (!fp) {
7381 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7382 err = -ENOENT;
7383 goto out2;
7384 }
7385
7386 filp = fp->filp;
7387 lock_count = le16_to_cpu(req->LockCount);
7388 lock_ele = req->locks;
7389
7390 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7391 if (!lock_count) {
7392 err = -EINVAL;
7393 goto out2;
7394 }
7395
7396 for (i = 0; i < lock_count; i++) {
7397 flags = le32_to_cpu(lock_ele[i].Flags);
7398
7399 flock = smb_flock_init(filp);
7400 if (!flock)
7401 goto out;
7402
7403 cmd = smb2_set_flock_flags(flock, flags);
7404
7405 lock_start = le64_to_cpu(lock_ele[i].Offset);
7406 lock_length = le64_to_cpu(lock_ele[i].Length);
7407 if (lock_start > U64_MAX - lock_length) {
7408 pr_err("Invalid lock range requested\n");
7409 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7410 locks_free_lock(flock);
7411 goto out;
7412 }
7413
7414 if (lock_start > OFFSET_MAX)
7415 flock->fl_start = OFFSET_MAX;
7416 else
7417 flock->fl_start = lock_start;
7418
7419 lock_length = le64_to_cpu(lock_ele[i].Length);
7420 if (lock_length > OFFSET_MAX - flock->fl_start)
7421 lock_length = OFFSET_MAX - flock->fl_start;
7422
7423 flock->fl_end = flock->fl_start + lock_length;
7424
7425 if (flock->fl_end < flock->fl_start) {
7426 ksmbd_debug(SMB,
7427 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7428 flock->fl_end, flock->fl_start);
7429 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7430 locks_free_lock(flock);
7431 goto out;
7432 }
7433
7434 /* Check conflict locks in one request */
7435 list_for_each_entry(cmp_lock, &lock_list, llist) {
7436 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7437 cmp_lock->fl->fl_end >= flock->fl_end) {
7438 if (cmp_lock->fl->c.flc_type != F_UNLCK &&
7439 flock->c.flc_type != F_UNLCK) {
7440 pr_err("conflict two locks in one request\n");
7441 err = -EINVAL;
7442 locks_free_lock(flock);
7443 goto out;
7444 }
7445 }
7446 }
7447
7448 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7449 if (!smb_lock) {
7450 err = -EINVAL;
7451 locks_free_lock(flock);
7452 goto out;
7453 }
7454 }
7455
7456 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7457 if (smb_lock->cmd < 0) {
7458 err = -EINVAL;
7459 goto out;
7460 }
7461
7462 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7463 err = -EINVAL;
7464 goto out;
7465 }
7466
7467 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7468 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7469 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7470 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7471 err = -EINVAL;
7472 goto out;
7473 }
7474
7475 prior_lock = smb_lock->flags;
7476
7477 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7478 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7479 goto no_check_cl;
7480
7481 nolock = 1;
7482 /* check locks in connection list */
7483 down_read(&conn_list_lock);
7484 hash_for_each(conn_list, bkt, conn, hlist) {
7485 spin_lock(&conn->llist_lock);
7486 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7487 if (file_inode(cmp_lock->fl->c.flc_file) !=
7488 file_inode(smb_lock->fl->c.flc_file))
7489 continue;
7490
7491 if (lock_is_unlock(smb_lock->fl)) {
7492 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
7493 cmp_lock->start == smb_lock->start &&
7494 cmp_lock->end == smb_lock->end &&
7495 !lock_defer_pending(cmp_lock->fl)) {
7496 nolock = 0;
7497 list_del(&cmp_lock->flist);
7498 list_del(&cmp_lock->clist);
7499 spin_unlock(&conn->llist_lock);
7500 up_read(&conn_list_lock);
7501
7502 locks_free_lock(cmp_lock->fl);
7503 kfree(cmp_lock);
7504 goto out_check_cl;
7505 }
7506 continue;
7507 }
7508
7509 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7510 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7511 continue;
7512 } else {
7513 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7514 continue;
7515 }
7516
7517 /* check zero byte lock range */
7518 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7519 cmp_lock->start > smb_lock->start &&
7520 cmp_lock->start < smb_lock->end) {
7521 spin_unlock(&conn->llist_lock);
7522 up_read(&conn_list_lock);
7523 pr_err("previous lock conflict with zero byte lock range\n");
7524 goto out;
7525 }
7526
7527 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7528 smb_lock->start > cmp_lock->start &&
7529 smb_lock->start < cmp_lock->end) {
7530 spin_unlock(&conn->llist_lock);
7531 up_read(&conn_list_lock);
7532 pr_err("current lock conflict with zero byte lock range\n");
7533 goto out;
7534 }
7535
7536 if (((cmp_lock->start <= smb_lock->start &&
7537 cmp_lock->end > smb_lock->start) ||
7538 (cmp_lock->start < smb_lock->end &&
7539 cmp_lock->end >= smb_lock->end)) &&
7540 !cmp_lock->zero_len && !smb_lock->zero_len) {
7541 spin_unlock(&conn->llist_lock);
7542 up_read(&conn_list_lock);
7543 pr_err("Not allow lock operation on exclusive lock range\n");
7544 goto out;
7545 }
7546 }
7547 spin_unlock(&conn->llist_lock);
7548 }
7549 up_read(&conn_list_lock);
7550 out_check_cl:
7551 if (lock_is_unlock(smb_lock->fl) && nolock) {
7552 pr_err("Try to unlock nolocked range\n");
7553 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7554 goto out;
7555 }
7556
7557 no_check_cl:
7558 flock = smb_lock->fl;
7559 list_del(&smb_lock->llist);
7560
7561 if (smb_lock->zero_len) {
7562 err = 0;
7563 goto skip;
7564 }
7565 retry:
7566 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7567 skip:
7568 if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) {
7569 if (!rc) {
7570 ksmbd_debug(SMB, "File unlocked\n");
7571 } else if (rc == -ENOENT) {
7572 rsp->hdr.Status = STATUS_NOT_LOCKED;
7573 goto out;
7574 }
7575 locks_free_lock(flock);
7576 kfree(smb_lock);
7577 } else {
7578 if (rc == FILE_LOCK_DEFERRED) {
7579 void **argv;
7580
7581 ksmbd_debug(SMB,
7582 "would have to wait for getting lock\n");
7583 list_add(&smb_lock->llist, &rollback_list);
7584
7585 argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP);
7586 if (!argv) {
7587 err = -ENOMEM;
7588 goto out;
7589 }
7590 argv[0] = flock;
7591
7592 rc = setup_async_work(work,
7593 smb2_remove_blocked_lock,
7594 argv);
7595 if (rc) {
7596 kfree(argv);
7597 err = -ENOMEM;
7598 goto out;
7599 }
7600 spin_lock(&fp->f_lock);
7601 list_add(&work->fp_entry, &fp->blocked_works);
7602 spin_unlock(&fp->f_lock);
7603
7604 smb2_send_interim_resp(work, STATUS_PENDING);
7605
7606 ksmbd_vfs_posix_lock_wait(flock);
7607
7608 spin_lock(&fp->f_lock);
7609 list_del(&work->fp_entry);
7610 spin_unlock(&fp->f_lock);
7611
7612 if (work->state != KSMBD_WORK_ACTIVE) {
7613 list_del(&smb_lock->llist);
7614 locks_free_lock(flock);
7615
7616 if (work->state == KSMBD_WORK_CANCELLED) {
7617 rsp->hdr.Status =
7618 STATUS_CANCELLED;
7619 kfree(smb_lock);
7620 smb2_send_interim_resp(work,
7621 STATUS_CANCELLED);
7622 work->send_no_response = 1;
7623 goto out;
7624 }
7625
7626 rsp->hdr.Status =
7627 STATUS_RANGE_NOT_LOCKED;
7628 kfree(smb_lock);
7629 goto out2;
7630 }
7631
7632 list_del(&smb_lock->llist);
7633 release_async_work(work);
7634 goto retry;
7635 } else if (!rc) {
7636 list_add(&smb_lock->llist, &rollback_list);
7637 spin_lock(&work->conn->llist_lock);
7638 list_add_tail(&smb_lock->clist,
7639 &work->conn->lock_list);
7640 list_add_tail(&smb_lock->flist,
7641 &fp->lock_list);
7642 spin_unlock(&work->conn->llist_lock);
7643 ksmbd_debug(SMB, "successful in taking lock\n");
7644 } else {
7645 goto out;
7646 }
7647 }
7648 }
7649
7650 if (atomic_read(&fp->f_ci->op_count) > 1)
7651 smb_break_all_oplock(work, fp);
7652
7653 rsp->StructureSize = cpu_to_le16(4);
7654 ksmbd_debug(SMB, "successful in taking lock\n");
7655 rsp->hdr.Status = STATUS_SUCCESS;
7656 rsp->Reserved = 0;
7657 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7658 if (err)
7659 goto out;
7660
7661 ksmbd_fd_put(work, fp);
7662 return 0;
7663
7664 out:
7665 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7666 locks_free_lock(smb_lock->fl);
7667 list_del(&smb_lock->llist);
7668 kfree(smb_lock);
7669 }
7670
7671 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7672 struct file_lock *rlock = NULL;
7673
7674 rlock = smb_flock_init(filp);
7675 rlock->c.flc_type = F_UNLCK;
7676 rlock->fl_start = smb_lock->start;
7677 rlock->fl_end = smb_lock->end;
7678
7679 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7680 if (rc)
7681 pr_err("rollback unlock fail : %d\n", rc);
7682
7683 list_del(&smb_lock->llist);
7684 spin_lock(&work->conn->llist_lock);
7685 if (!list_empty(&smb_lock->flist))
7686 list_del(&smb_lock->flist);
7687 list_del(&smb_lock->clist);
7688 spin_unlock(&work->conn->llist_lock);
7689
7690 locks_free_lock(smb_lock->fl);
7691 locks_free_lock(rlock);
7692 kfree(smb_lock);
7693 }
7694 out2:
7695 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7696
7697 if (!rsp->hdr.Status) {
7698 if (err == -EINVAL)
7699 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7700 else if (err == -ENOMEM)
7701 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7702 else if (err == -ENOENT)
7703 rsp->hdr.Status = STATUS_FILE_CLOSED;
7704 else
7705 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7706 }
7707
7708 smb2_set_err_rsp(work);
7709 ksmbd_fd_put(work, fp);
7710 return err;
7711 }
7712
fsctl_copychunk(struct ksmbd_work * work,struct copychunk_ioctl_req * ci_req,unsigned int cnt_code,unsigned int input_count,unsigned long long volatile_id,unsigned long long persistent_id,struct smb2_ioctl_rsp * rsp)7713 static int fsctl_copychunk(struct ksmbd_work *work,
7714 struct copychunk_ioctl_req *ci_req,
7715 unsigned int cnt_code,
7716 unsigned int input_count,
7717 unsigned long long volatile_id,
7718 unsigned long long persistent_id,
7719 struct smb2_ioctl_rsp *rsp)
7720 {
7721 struct copychunk_ioctl_rsp *ci_rsp;
7722 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7723 struct srv_copychunk *chunks;
7724 unsigned int i, chunk_count, chunk_count_written = 0;
7725 unsigned int chunk_size_written = 0;
7726 loff_t total_size_written = 0;
7727 int ret = 0;
7728
7729 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7730
7731 rsp->VolatileFileId = volatile_id;
7732 rsp->PersistentFileId = persistent_id;
7733 ci_rsp->ChunksWritten =
7734 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7735 ci_rsp->ChunkBytesWritten =
7736 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7737 ci_rsp->TotalBytesWritten =
7738 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7739
7740 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7741 if (chunk_count == 0)
7742 goto out;
7743 total_size_written = 0;
7744
7745 /* verify the SRV_COPYCHUNK_COPY packet */
7746 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7747 input_count < struct_size(ci_req, Chunks, chunk_count)) {
7748 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7749 return -EINVAL;
7750 }
7751
7752 chunks = &ci_req->Chunks[0];
7753 for (i = 0; i < chunk_count; i++) {
7754 if (le32_to_cpu(chunks[i].Length) == 0 ||
7755 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7756 break;
7757 total_size_written += le32_to_cpu(chunks[i].Length);
7758 }
7759
7760 if (i < chunk_count ||
7761 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7762 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7763 return -EINVAL;
7764 }
7765
7766 src_fp = ksmbd_lookup_foreign_fd(work,
7767 le64_to_cpu(ci_req->ResumeKey[0]));
7768 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7769 ret = -EINVAL;
7770 if (!src_fp ||
7771 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7772 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7773 goto out;
7774 }
7775
7776 if (!dst_fp) {
7777 rsp->hdr.Status = STATUS_FILE_CLOSED;
7778 goto out;
7779 }
7780
7781 /*
7782 * FILE_READ_DATA should only be included in
7783 * the FSCTL_COPYCHUNK case
7784 */
7785 if (cnt_code == FSCTL_COPYCHUNK &&
7786 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7787 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7788 goto out;
7789 }
7790
7791 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7792 chunks, chunk_count,
7793 &chunk_count_written,
7794 &chunk_size_written,
7795 &total_size_written);
7796 if (ret < 0) {
7797 if (ret == -EACCES)
7798 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7799 if (ret == -EAGAIN)
7800 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7801 else if (ret == -EBADF)
7802 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7803 else if (ret == -EFBIG || ret == -ENOSPC)
7804 rsp->hdr.Status = STATUS_DISK_FULL;
7805 else if (ret == -EINVAL)
7806 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7807 else if (ret == -EISDIR)
7808 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7809 else if (ret == -E2BIG)
7810 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7811 else
7812 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7813 }
7814
7815 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7816 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7817 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7818 out:
7819 ksmbd_fd_put(work, src_fp);
7820 ksmbd_fd_put(work, dst_fp);
7821 return ret;
7822 }
7823
idev_ipv4_address(struct in_device * idev)7824 static __be32 idev_ipv4_address(struct in_device *idev)
7825 {
7826 __be32 addr = 0;
7827
7828 struct in_ifaddr *ifa;
7829
7830 rcu_read_lock();
7831 in_dev_for_each_ifa_rcu(ifa, idev) {
7832 if (ifa->ifa_flags & IFA_F_SECONDARY)
7833 continue;
7834
7835 addr = ifa->ifa_address;
7836 break;
7837 }
7838 rcu_read_unlock();
7839 return addr;
7840 }
7841
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7842 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7843 struct smb2_ioctl_rsp *rsp,
7844 unsigned int out_buf_len)
7845 {
7846 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7847 int nbytes = 0;
7848 struct net_device *netdev;
7849 struct sockaddr_storage_rsp *sockaddr_storage;
7850 unsigned int flags;
7851 unsigned long long speed;
7852
7853 rtnl_lock();
7854 for_each_netdev(&init_net, netdev) {
7855 bool ipv4_set = false;
7856
7857 if (netdev->type == ARPHRD_LOOPBACK)
7858 continue;
7859
7860 if (!ksmbd_find_netdev_name_iface_list(netdev->name))
7861 continue;
7862
7863 flags = netif_get_flags(netdev);
7864 if (!(flags & IFF_RUNNING))
7865 continue;
7866 ipv6_retry:
7867 if (out_buf_len <
7868 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7869 rtnl_unlock();
7870 return -ENOSPC;
7871 }
7872
7873 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7874 &rsp->Buffer[nbytes];
7875 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7876
7877 nii_rsp->Capability = 0;
7878 if (netdev->real_num_tx_queues > 1)
7879 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7880 if (ksmbd_rdma_capable_netdev(netdev))
7881 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7882
7883 nii_rsp->Next = cpu_to_le32(152);
7884 nii_rsp->Reserved = 0;
7885
7886 if (netdev->ethtool_ops->get_link_ksettings) {
7887 struct ethtool_link_ksettings cmd;
7888
7889 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7890 speed = cmd.base.speed;
7891 } else {
7892 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7893 "speed is unknown, defaulting to 1Gb/sec");
7894 speed = SPEED_1000;
7895 }
7896
7897 speed *= 1000000;
7898 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7899
7900 sockaddr_storage = (struct sockaddr_storage_rsp *)
7901 nii_rsp->SockAddr_Storage;
7902 memset(sockaddr_storage, 0, 128);
7903
7904 if (!ipv4_set) {
7905 struct in_device *idev;
7906
7907 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7908 sockaddr_storage->addr4.Port = 0;
7909
7910 idev = __in_dev_get_rtnl(netdev);
7911 if (!idev)
7912 continue;
7913 sockaddr_storage->addr4.IPv4address =
7914 idev_ipv4_address(idev);
7915 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7916 ipv4_set = true;
7917 goto ipv6_retry;
7918 } else {
7919 struct inet6_dev *idev6;
7920 struct inet6_ifaddr *ifa;
7921 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7922
7923 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7924 sockaddr_storage->addr6.Port = 0;
7925 sockaddr_storage->addr6.FlowInfo = 0;
7926
7927 idev6 = __in6_dev_get(netdev);
7928 if (!idev6)
7929 continue;
7930
7931 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7932 if (ifa->flags & (IFA_F_TENTATIVE |
7933 IFA_F_DEPRECATED))
7934 continue;
7935 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7936 break;
7937 }
7938 sockaddr_storage->addr6.ScopeId = 0;
7939 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7940 }
7941 }
7942 rtnl_unlock();
7943
7944 /* zero if this is last one */
7945 if (nii_rsp)
7946 nii_rsp->Next = 0;
7947
7948 rsp->PersistentFileId = SMB2_NO_FID;
7949 rsp->VolatileFileId = SMB2_NO_FID;
7950 return nbytes;
7951 }
7952
fsctl_validate_negotiate_info(struct ksmbd_conn * conn,struct validate_negotiate_info_req * neg_req,struct validate_negotiate_info_rsp * neg_rsp,unsigned int in_buf_len)7953 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7954 struct validate_negotiate_info_req *neg_req,
7955 struct validate_negotiate_info_rsp *neg_rsp,
7956 unsigned int in_buf_len)
7957 {
7958 int ret = 0;
7959 int dialect;
7960
7961 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7962 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7963 return -EINVAL;
7964
7965 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7966 neg_req->DialectCount);
7967 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7968 ret = -EINVAL;
7969 goto err_out;
7970 }
7971
7972 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7973 ret = -EINVAL;
7974 goto err_out;
7975 }
7976
7977 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7978 ret = -EINVAL;
7979 goto err_out;
7980 }
7981
7982 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7983 ret = -EINVAL;
7984 goto err_out;
7985 }
7986
7987 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7988 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7989 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7990 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7991 err_out:
7992 return ret;
7993 }
7994
fsctl_query_allocated_ranges(struct ksmbd_work * work,u64 id,struct file_allocated_range_buffer * qar_req,struct file_allocated_range_buffer * qar_rsp,unsigned int in_count,unsigned int * out_count)7995 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7996 struct file_allocated_range_buffer *qar_req,
7997 struct file_allocated_range_buffer *qar_rsp,
7998 unsigned int in_count, unsigned int *out_count)
7999 {
8000 struct ksmbd_file *fp;
8001 loff_t start, length;
8002 int ret = 0;
8003
8004 *out_count = 0;
8005 if (in_count == 0)
8006 return -EINVAL;
8007
8008 start = le64_to_cpu(qar_req->file_offset);
8009 length = le64_to_cpu(qar_req->length);
8010
8011 if (start < 0 || length < 0)
8012 return -EINVAL;
8013
8014 fp = ksmbd_lookup_fd_fast(work, id);
8015 if (!fp)
8016 return -ENOENT;
8017
8018 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
8019 qar_rsp, in_count, out_count);
8020 if (ret && ret != -E2BIG)
8021 *out_count = 0;
8022
8023 ksmbd_fd_put(work, fp);
8024 return ret;
8025 }
8026
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)8027 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
8028 unsigned int out_buf_len,
8029 struct smb2_ioctl_req *req,
8030 struct smb2_ioctl_rsp *rsp)
8031 {
8032 struct ksmbd_rpc_command *rpc_resp;
8033 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
8034 int nbytes = 0;
8035
8036 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
8037 le32_to_cpu(req->InputCount));
8038 if (rpc_resp) {
8039 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
8040 /*
8041 * set STATUS_SOME_NOT_MAPPED response
8042 * for unknown domain sid.
8043 */
8044 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
8045 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
8046 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8047 goto out;
8048 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
8049 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8050 goto out;
8051 }
8052
8053 nbytes = rpc_resp->payload_sz;
8054 if (rpc_resp->payload_sz > out_buf_len) {
8055 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8056 nbytes = out_buf_len;
8057 }
8058
8059 if (!rpc_resp->payload_sz) {
8060 rsp->hdr.Status =
8061 STATUS_UNEXPECTED_IO_ERROR;
8062 goto out;
8063 }
8064
8065 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
8066 }
8067 out:
8068 kvfree(rpc_resp);
8069 return nbytes;
8070 }
8071
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)8072 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
8073 struct file_sparse *sparse)
8074 {
8075 struct ksmbd_file *fp;
8076 struct mnt_idmap *idmap;
8077 int ret = 0;
8078 __le32 old_fattr;
8079
8080 fp = ksmbd_lookup_fd_fast(work, id);
8081 if (!fp)
8082 return -ENOENT;
8083 idmap = file_mnt_idmap(fp->filp);
8084
8085 old_fattr = fp->f_ci->m_fattr;
8086 if (sparse->SetSparse)
8087 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
8088 else
8089 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
8090
8091 if (fp->f_ci->m_fattr != old_fattr &&
8092 test_share_config_flag(work->tcon->share_conf,
8093 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
8094 struct xattr_dos_attrib da;
8095
8096 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
8097 fp->filp->f_path.dentry, &da);
8098 if (ret <= 0)
8099 goto out;
8100
8101 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
8102 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
8103 &fp->filp->f_path,
8104 &da, true);
8105 if (ret)
8106 fp->f_ci->m_fattr = old_fattr;
8107 }
8108
8109 out:
8110 ksmbd_fd_put(work, fp);
8111 return ret;
8112 }
8113
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)8114 static int fsctl_request_resume_key(struct ksmbd_work *work,
8115 struct smb2_ioctl_req *req,
8116 struct resume_key_ioctl_rsp *key_rsp)
8117 {
8118 struct ksmbd_file *fp;
8119
8120 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
8121 if (!fp)
8122 return -ENOENT;
8123
8124 memset(key_rsp, 0, sizeof(*key_rsp));
8125 key_rsp->ResumeKey[0] = req->VolatileFileId;
8126 key_rsp->ResumeKey[1] = req->PersistentFileId;
8127 ksmbd_fd_put(work, fp);
8128
8129 return 0;
8130 }
8131
8132 /**
8133 * smb2_ioctl() - handler for smb2 ioctl command
8134 * @work: smb work containing ioctl command buffer
8135 *
8136 * Return: 0 on success, otherwise error
8137 */
smb2_ioctl(struct ksmbd_work * work)8138 int smb2_ioctl(struct ksmbd_work *work)
8139 {
8140 struct smb2_ioctl_req *req;
8141 struct smb2_ioctl_rsp *rsp;
8142 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
8143 u64 id = KSMBD_NO_FID;
8144 struct ksmbd_conn *conn = work->conn;
8145 int ret = 0;
8146 char *buffer;
8147
8148 ksmbd_debug(SMB, "Received smb2 ioctl request\n");
8149
8150 if (work->next_smb2_rcv_hdr_off) {
8151 req = ksmbd_req_buf_next(work);
8152 rsp = ksmbd_resp_buf_next(work);
8153 if (!has_file_id(req->VolatileFileId)) {
8154 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
8155 work->compound_fid);
8156 id = work->compound_fid;
8157 }
8158 } else {
8159 req = smb2_get_msg(work->request_buf);
8160 rsp = smb2_get_msg(work->response_buf);
8161 }
8162
8163 if (!has_file_id(id))
8164 id = req->VolatileFileId;
8165
8166 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
8167 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8168 goto out;
8169 }
8170
8171 buffer = (char *)req + le32_to_cpu(req->InputOffset);
8172
8173 cnt_code = le32_to_cpu(req->CtlCode);
8174 ret = smb2_calc_max_out_buf_len(work, 48,
8175 le32_to_cpu(req->MaxOutputResponse));
8176 if (ret < 0) {
8177 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8178 goto out;
8179 }
8180 out_buf_len = (unsigned int)ret;
8181 in_buf_len = le32_to_cpu(req->InputCount);
8182
8183 switch (cnt_code) {
8184 case FSCTL_DFS_GET_REFERRALS:
8185 case FSCTL_DFS_GET_REFERRALS_EX:
8186 /* Not support DFS yet */
8187 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8188 goto out;
8189 case FSCTL_CREATE_OR_GET_OBJECT_ID:
8190 {
8191 struct file_object_buf_type1_ioctl_rsp *obj_buf;
8192
8193 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8194 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8195 &rsp->Buffer[0];
8196
8197 /*
8198 * TODO: This is dummy implementation to pass smbtorture
8199 * Need to check correct response later
8200 */
8201 memset(obj_buf->ObjectId, 0x0, 16);
8202 memset(obj_buf->BirthVolumeId, 0x0, 16);
8203 memset(obj_buf->BirthObjectId, 0x0, 16);
8204 memset(obj_buf->DomainId, 0x0, 16);
8205
8206 break;
8207 }
8208 case FSCTL_PIPE_TRANSCEIVE:
8209 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8210 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8211 break;
8212 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8213 if (conn->dialect < SMB30_PROT_ID) {
8214 ret = -EOPNOTSUPP;
8215 goto out;
8216 }
8217
8218 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8219 Dialects)) {
8220 ret = -EINVAL;
8221 goto out;
8222 }
8223
8224 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8225 ret = -EINVAL;
8226 goto out;
8227 }
8228
8229 ret = fsctl_validate_negotiate_info(conn,
8230 (struct validate_negotiate_info_req *)buffer,
8231 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8232 in_buf_len);
8233 if (ret < 0)
8234 goto out;
8235
8236 nbytes = sizeof(struct validate_negotiate_info_rsp);
8237 rsp->PersistentFileId = SMB2_NO_FID;
8238 rsp->VolatileFileId = SMB2_NO_FID;
8239 break;
8240 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8241 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8242 if (ret < 0)
8243 goto out;
8244 nbytes = ret;
8245 break;
8246 case FSCTL_REQUEST_RESUME_KEY:
8247 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8248 ret = -EINVAL;
8249 goto out;
8250 }
8251
8252 ret = fsctl_request_resume_key(work, req,
8253 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8254 if (ret < 0)
8255 goto out;
8256 rsp->PersistentFileId = req->PersistentFileId;
8257 rsp->VolatileFileId = req->VolatileFileId;
8258 nbytes = sizeof(struct resume_key_ioctl_rsp);
8259 break;
8260 case FSCTL_COPYCHUNK:
8261 case FSCTL_COPYCHUNK_WRITE:
8262 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8263 ksmbd_debug(SMB,
8264 "User does not have write permission\n");
8265 ret = -EACCES;
8266 goto out;
8267 }
8268
8269 if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) {
8270 ret = -EINVAL;
8271 goto out;
8272 }
8273
8274 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8275 ret = -EINVAL;
8276 goto out;
8277 }
8278
8279 nbytes = sizeof(struct copychunk_ioctl_rsp);
8280 rsp->VolatileFileId = req->VolatileFileId;
8281 rsp->PersistentFileId = req->PersistentFileId;
8282 fsctl_copychunk(work,
8283 (struct copychunk_ioctl_req *)buffer,
8284 le32_to_cpu(req->CtlCode),
8285 le32_to_cpu(req->InputCount),
8286 req->VolatileFileId,
8287 req->PersistentFileId,
8288 rsp);
8289 break;
8290 case FSCTL_SET_SPARSE:
8291 if (in_buf_len < sizeof(struct file_sparse)) {
8292 ret = -EINVAL;
8293 goto out;
8294 }
8295
8296 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8297 if (ret < 0)
8298 goto out;
8299 break;
8300 case FSCTL_SET_ZERO_DATA:
8301 {
8302 struct file_zero_data_information *zero_data;
8303 struct ksmbd_file *fp;
8304 loff_t off, len, bfz;
8305
8306 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8307 ksmbd_debug(SMB,
8308 "User does not have write permission\n");
8309 ret = -EACCES;
8310 goto out;
8311 }
8312
8313 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8314 ret = -EINVAL;
8315 goto out;
8316 }
8317
8318 zero_data =
8319 (struct file_zero_data_information *)buffer;
8320
8321 off = le64_to_cpu(zero_data->FileOffset);
8322 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8323 if (off < 0 || bfz < 0 || off > bfz) {
8324 ret = -EINVAL;
8325 goto out;
8326 }
8327
8328 len = bfz - off;
8329 if (len) {
8330 fp = ksmbd_lookup_fd_fast(work, id);
8331 if (!fp) {
8332 ret = -ENOENT;
8333 goto out;
8334 }
8335
8336 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8337 ksmbd_fd_put(work, fp);
8338 if (ret < 0)
8339 goto out;
8340 }
8341 break;
8342 }
8343 case FSCTL_QUERY_ALLOCATED_RANGES:
8344 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8345 ret = -EINVAL;
8346 goto out;
8347 }
8348
8349 ret = fsctl_query_allocated_ranges(work, id,
8350 (struct file_allocated_range_buffer *)buffer,
8351 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8352 out_buf_len /
8353 sizeof(struct file_allocated_range_buffer), &nbytes);
8354 if (ret == -E2BIG) {
8355 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8356 } else if (ret < 0) {
8357 nbytes = 0;
8358 goto out;
8359 }
8360
8361 nbytes *= sizeof(struct file_allocated_range_buffer);
8362 break;
8363 case FSCTL_GET_REPARSE_POINT:
8364 {
8365 struct reparse_data_buffer *reparse_ptr;
8366 struct ksmbd_file *fp;
8367
8368 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8369 fp = ksmbd_lookup_fd_fast(work, id);
8370 if (!fp) {
8371 pr_err("not found fp!!\n");
8372 ret = -ENOENT;
8373 goto out;
8374 }
8375
8376 reparse_ptr->ReparseTag =
8377 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8378 reparse_ptr->ReparseDataLength = 0;
8379 ksmbd_fd_put(work, fp);
8380 nbytes = sizeof(struct reparse_data_buffer);
8381 break;
8382 }
8383 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8384 {
8385 struct ksmbd_file *fp_in, *fp_out = NULL;
8386 struct duplicate_extents_to_file *dup_ext;
8387 loff_t src_off, dst_off, length, cloned;
8388
8389 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8390 ret = -EINVAL;
8391 goto out;
8392 }
8393
8394 dup_ext = (struct duplicate_extents_to_file *)buffer;
8395
8396 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8397 dup_ext->PersistentFileHandle);
8398 if (!fp_in) {
8399 pr_err("not found file handle in duplicate extent to file\n");
8400 ret = -ENOENT;
8401 goto out;
8402 }
8403
8404 fp_out = ksmbd_lookup_fd_fast(work, id);
8405 if (!fp_out) {
8406 pr_err("not found fp\n");
8407 ret = -ENOENT;
8408 goto dup_ext_out;
8409 }
8410
8411 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8412 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8413 length = le64_to_cpu(dup_ext->ByteCount);
8414 /*
8415 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8416 * should fall back to vfs_copy_file_range(). This could be
8417 * beneficial when re-exporting nfs/smb mount, but note that
8418 * this can result in partial copy that returns an error status.
8419 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8420 * fall back to vfs_copy_file_range(), should be avoided when
8421 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8422 */
8423 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8424 fp_out->filp, dst_off, length, 0);
8425 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8426 ret = -EOPNOTSUPP;
8427 goto dup_ext_out;
8428 } else if (cloned != length) {
8429 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8430 fp_out->filp, dst_off,
8431 length, 0);
8432 if (cloned != length) {
8433 if (cloned < 0)
8434 ret = cloned;
8435 else
8436 ret = -EINVAL;
8437 }
8438 }
8439
8440 dup_ext_out:
8441 ksmbd_fd_put(work, fp_in);
8442 ksmbd_fd_put(work, fp_out);
8443 if (ret < 0)
8444 goto out;
8445 break;
8446 }
8447 default:
8448 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8449 cnt_code);
8450 ret = -EOPNOTSUPP;
8451 goto out;
8452 }
8453
8454 rsp->CtlCode = cpu_to_le32(cnt_code);
8455 rsp->InputCount = cpu_to_le32(0);
8456 rsp->InputOffset = cpu_to_le32(112);
8457 rsp->OutputOffset = cpu_to_le32(112);
8458 rsp->OutputCount = cpu_to_le32(nbytes);
8459 rsp->StructureSize = cpu_to_le16(49);
8460 rsp->Reserved = cpu_to_le16(0);
8461 rsp->Flags = cpu_to_le32(0);
8462 rsp->Reserved2 = cpu_to_le32(0);
8463 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8464 if (!ret)
8465 return ret;
8466
8467 out:
8468 if (ret == -EACCES)
8469 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8470 else if (ret == -ENOENT)
8471 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8472 else if (ret == -EOPNOTSUPP)
8473 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8474 else if (ret == -ENOSPC)
8475 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8476 else if (ret < 0 || rsp->hdr.Status == 0)
8477 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8478 smb2_set_err_rsp(work);
8479 return 0;
8480 }
8481
8482 /**
8483 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8484 * @work: smb work containing oplock break command buffer
8485 *
8486 * Return: 0
8487 */
smb20_oplock_break_ack(struct ksmbd_work * work)8488 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8489 {
8490 struct smb2_oplock_break *req;
8491 struct smb2_oplock_break *rsp;
8492 struct ksmbd_file *fp;
8493 struct oplock_info *opinfo = NULL;
8494 __le32 err = 0;
8495 int ret = 0;
8496 u64 volatile_id, persistent_id;
8497 char req_oplevel = 0, rsp_oplevel = 0;
8498 unsigned int oplock_change_type;
8499
8500 WORK_BUFFERS(work, req, rsp);
8501
8502 volatile_id = req->VolatileFid;
8503 persistent_id = req->PersistentFid;
8504 req_oplevel = req->OplockLevel;
8505 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8506 volatile_id, persistent_id, req_oplevel);
8507
8508 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8509 if (!fp) {
8510 rsp->hdr.Status = STATUS_FILE_CLOSED;
8511 smb2_set_err_rsp(work);
8512 return;
8513 }
8514
8515 opinfo = opinfo_get(fp);
8516 if (!opinfo) {
8517 pr_err("unexpected null oplock_info\n");
8518 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8519 smb2_set_err_rsp(work);
8520 ksmbd_fd_put(work, fp);
8521 return;
8522 }
8523
8524 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8525 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8526 goto err_out;
8527 }
8528
8529 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8530 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8531 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8532 goto err_out;
8533 }
8534
8535 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8536 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8537 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8538 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8539 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8540 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8541 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8542 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8543 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8544 oplock_change_type = OPLOCK_READ_TO_NONE;
8545 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8546 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8547 err = STATUS_INVALID_DEVICE_STATE;
8548 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8549 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8550 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8551 oplock_change_type = OPLOCK_WRITE_TO_READ;
8552 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8553 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8554 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8555 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8556 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8557 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8558 oplock_change_type = OPLOCK_READ_TO_NONE;
8559 } else {
8560 oplock_change_type = 0;
8561 }
8562 } else {
8563 oplock_change_type = 0;
8564 }
8565
8566 switch (oplock_change_type) {
8567 case OPLOCK_WRITE_TO_READ:
8568 ret = opinfo_write_to_read(opinfo);
8569 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8570 break;
8571 case OPLOCK_WRITE_TO_NONE:
8572 ret = opinfo_write_to_none(opinfo);
8573 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8574 break;
8575 case OPLOCK_READ_TO_NONE:
8576 ret = opinfo_read_to_none(opinfo);
8577 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8578 break;
8579 default:
8580 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8581 opinfo->level, rsp_oplevel);
8582 }
8583
8584 if (ret < 0) {
8585 rsp->hdr.Status = err;
8586 goto err_out;
8587 }
8588
8589 rsp->StructureSize = cpu_to_le16(24);
8590 rsp->OplockLevel = rsp_oplevel;
8591 rsp->Reserved = 0;
8592 rsp->Reserved2 = 0;
8593 rsp->VolatileFid = volatile_id;
8594 rsp->PersistentFid = persistent_id;
8595 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8596 if (ret) {
8597 err_out:
8598 smb2_set_err_rsp(work);
8599 }
8600
8601 opinfo->op_state = OPLOCK_STATE_NONE;
8602 wake_up_interruptible_all(&opinfo->oplock_q);
8603 opinfo_put(opinfo);
8604 ksmbd_fd_put(work, fp);
8605 }
8606
check_lease_state(struct lease * lease,__le32 req_state)8607 static int check_lease_state(struct lease *lease, __le32 req_state)
8608 {
8609 if ((lease->new_state ==
8610 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8611 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8612 lease->new_state = req_state;
8613 return 0;
8614 }
8615
8616 if (lease->new_state == req_state)
8617 return 0;
8618
8619 return 1;
8620 }
8621
8622 /**
8623 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8624 * @work: smb work containing lease break command buffer
8625 *
8626 * Return: 0
8627 */
smb21_lease_break_ack(struct ksmbd_work * work)8628 static void smb21_lease_break_ack(struct ksmbd_work *work)
8629 {
8630 struct ksmbd_conn *conn = work->conn;
8631 struct smb2_lease_ack *req;
8632 struct smb2_lease_ack *rsp;
8633 struct oplock_info *opinfo;
8634 __le32 err = 0;
8635 int ret = 0;
8636 unsigned int lease_change_type;
8637 __le32 lease_state;
8638 struct lease *lease;
8639
8640 WORK_BUFFERS(work, req, rsp);
8641
8642 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8643 le32_to_cpu(req->LeaseState));
8644 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8645 if (!opinfo) {
8646 ksmbd_debug(OPLOCK, "file not opened\n");
8647 smb2_set_err_rsp(work);
8648 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8649 return;
8650 }
8651 lease = opinfo->o_lease;
8652
8653 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8654 pr_err("unexpected lease break state 0x%x\n",
8655 opinfo->op_state);
8656 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8657 goto err_out;
8658 }
8659
8660 if (check_lease_state(lease, req->LeaseState)) {
8661 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8662 ksmbd_debug(OPLOCK,
8663 "req lease state: 0x%x, expected state: 0x%x\n",
8664 req->LeaseState, lease->new_state);
8665 goto err_out;
8666 }
8667
8668 if (!atomic_read(&opinfo->breaking_cnt)) {
8669 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8670 goto err_out;
8671 }
8672
8673 /* check for bad lease state */
8674 if (req->LeaseState &
8675 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8676 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8677 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8678 lease_change_type = OPLOCK_WRITE_TO_NONE;
8679 else
8680 lease_change_type = OPLOCK_READ_TO_NONE;
8681 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8682 le32_to_cpu(lease->state),
8683 le32_to_cpu(req->LeaseState));
8684 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8685 req->LeaseState != SMB2_LEASE_NONE_LE) {
8686 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8687 lease_change_type = OPLOCK_READ_TO_NONE;
8688 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8689 le32_to_cpu(lease->state),
8690 le32_to_cpu(req->LeaseState));
8691 } else {
8692 /* valid lease state changes */
8693 err = STATUS_INVALID_DEVICE_STATE;
8694 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8695 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8696 lease_change_type = OPLOCK_WRITE_TO_NONE;
8697 else
8698 lease_change_type = OPLOCK_READ_TO_NONE;
8699 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8700 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8701 lease_change_type = OPLOCK_WRITE_TO_READ;
8702 else
8703 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8704 } else {
8705 lease_change_type = 0;
8706 }
8707 }
8708
8709 switch (lease_change_type) {
8710 case OPLOCK_WRITE_TO_READ:
8711 ret = opinfo_write_to_read(opinfo);
8712 break;
8713 case OPLOCK_READ_HANDLE_TO_READ:
8714 ret = opinfo_read_handle_to_read(opinfo);
8715 break;
8716 case OPLOCK_WRITE_TO_NONE:
8717 ret = opinfo_write_to_none(opinfo);
8718 break;
8719 case OPLOCK_READ_TO_NONE:
8720 ret = opinfo_read_to_none(opinfo);
8721 break;
8722 default:
8723 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8724 le32_to_cpu(lease->state),
8725 le32_to_cpu(req->LeaseState));
8726 }
8727
8728 if (ret < 0) {
8729 rsp->hdr.Status = err;
8730 goto err_out;
8731 }
8732
8733 lease_state = lease->state;
8734
8735 rsp->StructureSize = cpu_to_le16(36);
8736 rsp->Reserved = 0;
8737 rsp->Flags = 0;
8738 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8739 rsp->LeaseState = lease_state;
8740 rsp->LeaseDuration = 0;
8741 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8742 if (ret) {
8743 err_out:
8744 smb2_set_err_rsp(work);
8745 }
8746
8747 opinfo->op_state = OPLOCK_STATE_NONE;
8748 wake_up_interruptible_all(&opinfo->oplock_q);
8749 atomic_dec(&opinfo->breaking_cnt);
8750 wake_up_interruptible_all(&opinfo->oplock_brk);
8751 opinfo_put(opinfo);
8752 }
8753
8754 /**
8755 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8756 * @work: smb work containing oplock/lease break command buffer
8757 *
8758 * Return: 0
8759 */
smb2_oplock_break(struct ksmbd_work * work)8760 int smb2_oplock_break(struct ksmbd_work *work)
8761 {
8762 struct smb2_oplock_break *req;
8763 struct smb2_oplock_break *rsp;
8764
8765 ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n");
8766
8767 WORK_BUFFERS(work, req, rsp);
8768
8769 switch (le16_to_cpu(req->StructureSize)) {
8770 case OP_BREAK_STRUCT_SIZE_20:
8771 smb20_oplock_break_ack(work);
8772 break;
8773 case OP_BREAK_STRUCT_SIZE_21:
8774 smb21_lease_break_ack(work);
8775 break;
8776 default:
8777 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8778 le16_to_cpu(req->StructureSize));
8779 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8780 smb2_set_err_rsp(work);
8781 }
8782
8783 return 0;
8784 }
8785
8786 /**
8787 * smb2_notify() - handler for smb2 notify request
8788 * @work: smb work containing notify command buffer
8789 *
8790 * Return: 0
8791 */
smb2_notify(struct ksmbd_work * work)8792 int smb2_notify(struct ksmbd_work *work)
8793 {
8794 struct smb2_change_notify_req *req;
8795 struct smb2_change_notify_rsp *rsp;
8796
8797 ksmbd_debug(SMB, "Received smb2 notify\n");
8798
8799 WORK_BUFFERS(work, req, rsp);
8800
8801 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8802 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8803 smb2_set_err_rsp(work);
8804 return 0;
8805 }
8806
8807 smb2_set_err_rsp(work);
8808 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8809 return 0;
8810 }
8811
8812 /**
8813 * smb2_is_sign_req() - handler for checking packet signing status
8814 * @work: smb work containing notify command buffer
8815 * @command: SMB2 command id
8816 *
8817 * Return: true if packed is signed, false otherwise
8818 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8819 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8820 {
8821 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8822
8823 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8824 command != SMB2_NEGOTIATE_HE &&
8825 command != SMB2_SESSION_SETUP_HE &&
8826 command != SMB2_OPLOCK_BREAK_HE)
8827 return true;
8828
8829 return false;
8830 }
8831
8832 /**
8833 * smb2_check_sign_req() - handler for req packet sign processing
8834 * @work: smb work containing notify command buffer
8835 *
8836 * Return: 1 on success, 0 otherwise
8837 */
smb2_check_sign_req(struct ksmbd_work * work)8838 int smb2_check_sign_req(struct ksmbd_work *work)
8839 {
8840 struct smb2_hdr *hdr;
8841 char signature_req[SMB2_SIGNATURE_SIZE];
8842 char signature[SMB2_HMACSHA256_SIZE];
8843 struct kvec iov[1];
8844 size_t len;
8845
8846 hdr = smb2_get_msg(work->request_buf);
8847 if (work->next_smb2_rcv_hdr_off)
8848 hdr = ksmbd_req_buf_next(work);
8849
8850 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8851 len = get_rfc1002_len(work->request_buf);
8852 else if (hdr->NextCommand)
8853 len = le32_to_cpu(hdr->NextCommand);
8854 else
8855 len = get_rfc1002_len(work->request_buf) -
8856 work->next_smb2_rcv_hdr_off;
8857
8858 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8859 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8860
8861 iov[0].iov_base = (char *)&hdr->ProtocolId;
8862 iov[0].iov_len = len;
8863
8864 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8865 signature))
8866 return 0;
8867
8868 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8869 pr_err("bad smb2 signature\n");
8870 return 0;
8871 }
8872
8873 return 1;
8874 }
8875
8876 /**
8877 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8878 * @work: smb work containing notify command buffer
8879 *
8880 */
smb2_set_sign_rsp(struct ksmbd_work * work)8881 void smb2_set_sign_rsp(struct ksmbd_work *work)
8882 {
8883 struct smb2_hdr *hdr;
8884 char signature[SMB2_HMACSHA256_SIZE];
8885 struct kvec *iov;
8886 int n_vec = 1;
8887
8888 hdr = ksmbd_resp_buf_curr(work);
8889 hdr->Flags |= SMB2_FLAGS_SIGNED;
8890 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8891
8892 if (hdr->Command == SMB2_READ) {
8893 iov = &work->iov[work->iov_idx - 1];
8894 n_vec++;
8895 } else {
8896 iov = &work->iov[work->iov_idx];
8897 }
8898
8899 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8900 signature))
8901 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8902 }
8903
8904 /**
8905 * smb3_check_sign_req() - handler for req packet sign processing
8906 * @work: smb work containing notify command buffer
8907 *
8908 * Return: 1 on success, 0 otherwise
8909 */
smb3_check_sign_req(struct ksmbd_work * work)8910 int smb3_check_sign_req(struct ksmbd_work *work)
8911 {
8912 struct ksmbd_conn *conn = work->conn;
8913 char *signing_key;
8914 struct smb2_hdr *hdr;
8915 struct channel *chann;
8916 char signature_req[SMB2_SIGNATURE_SIZE];
8917 char signature[SMB2_CMACAES_SIZE];
8918 struct kvec iov[1];
8919 size_t len;
8920
8921 hdr = smb2_get_msg(work->request_buf);
8922 if (work->next_smb2_rcv_hdr_off)
8923 hdr = ksmbd_req_buf_next(work);
8924
8925 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8926 len = get_rfc1002_len(work->request_buf);
8927 else if (hdr->NextCommand)
8928 len = le32_to_cpu(hdr->NextCommand);
8929 else
8930 len = get_rfc1002_len(work->request_buf) -
8931 work->next_smb2_rcv_hdr_off;
8932
8933 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8934 signing_key = work->sess->smb3signingkey;
8935 } else {
8936 chann = lookup_chann_list(work->sess, conn);
8937 if (!chann) {
8938 return 0;
8939 }
8940 signing_key = chann->smb3signingkey;
8941 }
8942
8943 if (!signing_key) {
8944 pr_err("SMB3 signing key is not generated\n");
8945 return 0;
8946 }
8947
8948 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8949 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8950 iov[0].iov_base = (char *)&hdr->ProtocolId;
8951 iov[0].iov_len = len;
8952
8953 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8954 return 0;
8955
8956 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8957 pr_err("bad smb2 signature\n");
8958 return 0;
8959 }
8960
8961 return 1;
8962 }
8963
8964 /**
8965 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8966 * @work: smb work containing notify command buffer
8967 *
8968 */
smb3_set_sign_rsp(struct ksmbd_work * work)8969 void smb3_set_sign_rsp(struct ksmbd_work *work)
8970 {
8971 struct ksmbd_conn *conn = work->conn;
8972 struct smb2_hdr *hdr;
8973 struct channel *chann;
8974 char signature[SMB2_CMACAES_SIZE];
8975 struct kvec *iov;
8976 int n_vec = 1;
8977 char *signing_key;
8978
8979 hdr = ksmbd_resp_buf_curr(work);
8980
8981 if (conn->binding == false &&
8982 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8983 signing_key = work->sess->smb3signingkey;
8984 } else {
8985 chann = lookup_chann_list(work->sess, work->conn);
8986 if (!chann) {
8987 return;
8988 }
8989 signing_key = chann->smb3signingkey;
8990 }
8991
8992 if (!signing_key)
8993 return;
8994
8995 hdr->Flags |= SMB2_FLAGS_SIGNED;
8996 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8997
8998 if (hdr->Command == SMB2_READ) {
8999 iov = &work->iov[work->iov_idx - 1];
9000 n_vec++;
9001 } else {
9002 iov = &work->iov[work->iov_idx];
9003 }
9004
9005 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
9006 signature))
9007 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
9008 }
9009
9010 /**
9011 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
9012 * @work: smb work containing response buffer
9013 *
9014 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)9015 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
9016 {
9017 struct ksmbd_conn *conn = work->conn;
9018 struct ksmbd_session *sess = work->sess;
9019 struct smb2_hdr *req, *rsp;
9020
9021 if (conn->dialect != SMB311_PROT_ID)
9022 return;
9023
9024 WORK_BUFFERS(work, req, rsp);
9025
9026 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
9027 conn->preauth_info)
9028 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
9029 conn->preauth_info->Preauth_HashValue);
9030
9031 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
9032 __u8 *hash_value;
9033
9034 if (conn->binding) {
9035 struct preauth_session *preauth_sess;
9036
9037 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
9038 if (!preauth_sess)
9039 return;
9040 hash_value = preauth_sess->Preauth_HashValue;
9041 } else {
9042 hash_value = sess->Preauth_HashValue;
9043 if (!hash_value)
9044 return;
9045 }
9046 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
9047 hash_value);
9048 }
9049 }
9050
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)9051 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
9052 {
9053 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
9054 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
9055 unsigned int orig_len = get_rfc1002_len(old_buf);
9056
9057 /* tr_buf must be cleared by the caller */
9058 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
9059 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
9060 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
9061 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
9062 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
9063 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
9064 else
9065 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
9066 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
9067 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
9068 inc_rfc1001_len(tr_buf, orig_len);
9069 }
9070
smb3_encrypt_resp(struct ksmbd_work * work)9071 int smb3_encrypt_resp(struct ksmbd_work *work)
9072 {
9073 struct kvec *iov = work->iov;
9074 int rc = -ENOMEM;
9075 void *tr_buf;
9076
9077 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP);
9078 if (!tr_buf)
9079 return rc;
9080
9081 /* fill transform header */
9082 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
9083
9084 iov[0].iov_base = tr_buf;
9085 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
9086 work->tr_buf = tr_buf;
9087
9088 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
9089 }
9090
smb3_is_transform_hdr(void * buf)9091 bool smb3_is_transform_hdr(void *buf)
9092 {
9093 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
9094
9095 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
9096 }
9097
smb3_decrypt_req(struct ksmbd_work * work)9098 int smb3_decrypt_req(struct ksmbd_work *work)
9099 {
9100 struct ksmbd_session *sess;
9101 char *buf = work->request_buf;
9102 unsigned int pdu_length = get_rfc1002_len(buf);
9103 struct kvec iov[2];
9104 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
9105 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
9106 int rc = 0;
9107
9108 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
9109 buf_data_size < sizeof(struct smb2_hdr)) {
9110 pr_err("Transform message is too small (%u)\n",
9111 pdu_length);
9112 return -ECONNABORTED;
9113 }
9114
9115 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
9116 pr_err("Transform message is broken\n");
9117 return -ECONNABORTED;
9118 }
9119
9120 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
9121 if (!sess) {
9122 pr_err("invalid session id(%llx) in transform header\n",
9123 le64_to_cpu(tr_hdr->SessionId));
9124 return -ECONNABORTED;
9125 }
9126 ksmbd_user_session_put(sess);
9127
9128 iov[0].iov_base = buf;
9129 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
9130 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
9131 iov[1].iov_len = buf_data_size;
9132 rc = ksmbd_crypt_message(work, iov, 2, 0);
9133 if (rc)
9134 return rc;
9135
9136 memmove(buf + 4, iov[1].iov_base, buf_data_size);
9137 *(__be32 *)buf = cpu_to_be32(buf_data_size);
9138
9139 return rc;
9140 }
9141
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)9142 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
9143 {
9144 struct ksmbd_conn *conn = work->conn;
9145 struct ksmbd_session *sess = work->sess;
9146 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
9147
9148 if (conn->dialect < SMB30_PROT_ID)
9149 return false;
9150
9151 if (work->next_smb2_rcv_hdr_off)
9152 rsp = ksmbd_resp_buf_next(work);
9153
9154 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
9155 sess->user && !user_guest(sess->user) &&
9156 rsp->Status == STATUS_SUCCESS)
9157 return true;
9158 return false;
9159 }
9160