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 "transport_rdma.h"
27 #include "vfs.h"
28 #include "vfs_cache.h"
29 #include "misc.h"
30
31 #include "server.h"
32 #include "smb_common.h"
33 #include "smbstatus.h"
34 #include "ksmbd_work.h"
35 #include "mgmt/user_config.h"
36 #include "mgmt/share_config.h"
37 #include "mgmt/tree_connect.h"
38 #include "mgmt/user_session.h"
39 #include "mgmt/ksmbd_ida.h"
40 #include "ndr.h"
41
__wbuf(struct ksmbd_work * work,void ** req,void ** rsp)42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
43 {
44 if (work->next_smb2_rcv_hdr_off) {
45 *req = ksmbd_req_buf_next(work);
46 *rsp = ksmbd_resp_buf_next(work);
47 } else {
48 *req = smb2_get_msg(work->request_buf);
49 *rsp = smb2_get_msg(work->response_buf);
50 }
51 }
52
53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
54
55 /**
56 * check_session_id() - check for valid session id in smb header
57 * @conn: connection instance
58 * @id: session id from smb header
59 *
60 * Return: 1 if valid session id, otherwise 0
61 */
check_session_id(struct ksmbd_conn * conn,u64 id)62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
63 {
64 struct ksmbd_session *sess;
65
66 if (id == 0 || id == -1)
67 return false;
68
69 sess = ksmbd_session_lookup_all(conn, id);
70 if (sess)
71 return true;
72 pr_err("Invalid user session id: %llu\n", id);
73 return false;
74 }
75
lookup_chann_list(struct ksmbd_session * sess,struct ksmbd_conn * conn)76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
77 {
78 return xa_load(&sess->ksmbd_chann_list, (long)conn);
79 }
80
81 /**
82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
83 * @work: smb work
84 *
85 * Return: 0 if there is a tree connection matched or these are
86 * skipable commands, otherwise error
87 */
smb2_get_ksmbd_tcon(struct ksmbd_work * work)88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
89 {
90 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
91 unsigned int cmd = le16_to_cpu(req_hdr->Command);
92 unsigned int tree_id;
93
94 if (cmd == SMB2_TREE_CONNECT_HE ||
95 cmd == SMB2_CANCEL_HE ||
96 cmd == SMB2_LOGOFF_HE) {
97 ksmbd_debug(SMB, "skip to check tree connect request\n");
98 return 0;
99 }
100
101 if (xa_empty(&work->sess->tree_conns)) {
102 ksmbd_debug(SMB, "NO tree connected\n");
103 return -ENOENT;
104 }
105
106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
107
108 /*
109 * If request is not the first in Compound request,
110 * Just validate tree id in header with work->tcon->id.
111 */
112 if (work->next_smb2_rcv_hdr_off) {
113 if (!work->tcon) {
114 pr_err("The first operation in the compound does not have tcon\n");
115 return -EINVAL;
116 }
117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
118 pr_err("tree id(%u) is different with id(%u) in first operation\n",
119 tree_id, work->tcon->id);
120 return -EINVAL;
121 }
122 return 1;
123 }
124
125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
126 if (!work->tcon) {
127 pr_err("Invalid tid %d\n", tree_id);
128 return -ENOENT;
129 }
130
131 return 1;
132 }
133
134 /**
135 * smb2_set_err_rsp() - set error response code on smb response
136 * @work: smb work containing response buffer
137 */
smb2_set_err_rsp(struct ksmbd_work * work)138 void smb2_set_err_rsp(struct ksmbd_work *work)
139 {
140 struct smb2_err_rsp *err_rsp;
141
142 if (work->next_smb2_rcv_hdr_off)
143 err_rsp = ksmbd_resp_buf_next(work);
144 else
145 err_rsp = smb2_get_msg(work->response_buf);
146
147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
148 int err;
149
150 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
151 err_rsp->ErrorContextCount = 0;
152 err_rsp->Reserved = 0;
153 err_rsp->ByteCount = 0;
154 err_rsp->ErrorData[0] = 0;
155 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
156 __SMB2_HEADER_STRUCTURE_SIZE +
157 SMB2_ERROR_STRUCTURE_SIZE2);
158 if (err)
159 work->send_no_response = 1;
160 }
161 }
162
163 /**
164 * is_smb2_neg_cmd() - is it smb2 negotiation command
165 * @work: smb work containing smb header
166 *
167 * Return: true if smb2 negotiation command, otherwise false
168 */
is_smb2_neg_cmd(struct ksmbd_work * work)169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
170 {
171 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
172
173 /* is it SMB2 header ? */
174 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
175 return false;
176
177 /* make sure it is request not response message */
178 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
179 return false;
180
181 if (hdr->Command != SMB2_NEGOTIATE)
182 return false;
183
184 return true;
185 }
186
187 /**
188 * is_smb2_rsp() - is it smb2 response
189 * @work: smb work containing smb response buffer
190 *
191 * Return: true if smb2 response, otherwise false
192 */
is_smb2_rsp(struct ksmbd_work * work)193 bool is_smb2_rsp(struct ksmbd_work *work)
194 {
195 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
196
197 /* is it SMB2 header ? */
198 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
199 return false;
200
201 /* make sure it is response not request message */
202 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
203 return false;
204
205 return true;
206 }
207
208 /**
209 * get_smb2_cmd_val() - get smb command code from smb header
210 * @work: smb work containing smb request buffer
211 *
212 * Return: smb2 request command value
213 */
get_smb2_cmd_val(struct ksmbd_work * work)214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
215 {
216 struct smb2_hdr *rcv_hdr;
217
218 if (work->next_smb2_rcv_hdr_off)
219 rcv_hdr = ksmbd_req_buf_next(work);
220 else
221 rcv_hdr = smb2_get_msg(work->request_buf);
222 return le16_to_cpu(rcv_hdr->Command);
223 }
224
225 /**
226 * set_smb2_rsp_status() - set error response code on smb2 header
227 * @work: smb work containing response buffer
228 * @err: error response code
229 */
set_smb2_rsp_status(struct ksmbd_work * work,__le32 err)230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
231 {
232 struct smb2_hdr *rsp_hdr;
233
234 rsp_hdr = smb2_get_msg(work->response_buf);
235 rsp_hdr->Status = err;
236
237 work->iov_idx = 0;
238 work->iov_cnt = 0;
239 work->next_smb2_rcv_hdr_off = 0;
240 smb2_set_err_rsp(work);
241 }
242
243 /**
244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
245 * @work: smb work containing smb request buffer
246 *
247 * smb2 negotiate response is sent in reply of smb1 negotiate command for
248 * dialect auto-negotiation.
249 */
init_smb2_neg_rsp(struct ksmbd_work * work)250 int init_smb2_neg_rsp(struct ksmbd_work *work)
251 {
252 struct smb2_hdr *rsp_hdr;
253 struct smb2_negotiate_rsp *rsp;
254 struct ksmbd_conn *conn = work->conn;
255 int err;
256
257 rsp_hdr = smb2_get_msg(work->response_buf);
258 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
259 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
260 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
261 rsp_hdr->CreditRequest = cpu_to_le16(2);
262 rsp_hdr->Command = SMB2_NEGOTIATE;
263 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
264 rsp_hdr->NextCommand = 0;
265 rsp_hdr->MessageId = 0;
266 rsp_hdr->Id.SyncId.ProcessId = 0;
267 rsp_hdr->Id.SyncId.TreeId = 0;
268 rsp_hdr->SessionId = 0;
269 memset(rsp_hdr->Signature, 0, 16);
270
271 rsp = smb2_get_msg(work->response_buf);
272
273 WARN_ON(ksmbd_conn_good(conn));
274
275 rsp->StructureSize = cpu_to_le16(65);
276 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
277 rsp->DialectRevision = cpu_to_le16(conn->dialect);
278 /* Not setting conn guid rsp->ServerGUID, as it
279 * not used by client for identifying connection
280 */
281 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
282 /* Default Max Message Size till SMB2.0, 64K*/
283 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
284 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
285 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
286
287 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
288 rsp->ServerStartTime = 0;
289
290 rsp->SecurityBufferOffset = cpu_to_le16(128);
291 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
292 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
293 le16_to_cpu(rsp->SecurityBufferOffset));
294 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
295 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
296 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
297 err = ksmbd_iov_pin_rsp(work, rsp,
298 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
299 if (err)
300 return err;
301 conn->use_spnego = true;
302
303 ksmbd_conn_set_need_negotiate(conn);
304 return 0;
305 }
306
307 /**
308 * smb2_set_rsp_credits() - set number of credits in response buffer
309 * @work: smb work containing smb response buffer
310 */
smb2_set_rsp_credits(struct ksmbd_work * work)311 int smb2_set_rsp_credits(struct ksmbd_work *work)
312 {
313 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
314 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
315 struct ksmbd_conn *conn = work->conn;
316 unsigned short credits_requested, aux_max;
317 unsigned short credit_charge, credits_granted = 0;
318
319 if (work->send_no_response)
320 return 0;
321
322 hdr->CreditCharge = req_hdr->CreditCharge;
323
324 if (conn->total_credits > conn->vals->max_credits) {
325 hdr->CreditRequest = 0;
326 pr_err("Total credits overflow: %d\n", conn->total_credits);
327 return -EINVAL;
328 }
329
330 credit_charge = max_t(unsigned short,
331 le16_to_cpu(req_hdr->CreditCharge), 1);
332 if (credit_charge > conn->total_credits) {
333 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
334 credit_charge, conn->total_credits);
335 return -EINVAL;
336 }
337
338 conn->total_credits -= credit_charge;
339 conn->outstanding_credits -= credit_charge;
340 credits_requested = max_t(unsigned short,
341 le16_to_cpu(req_hdr->CreditRequest), 1);
342
343 /* according to smb2.credits smbtorture, Windows server
344 * 2016 or later grant up to 8192 credits at once.
345 *
346 * TODO: Need to adjuct CreditRequest value according to
347 * current cpu load
348 */
349 if (hdr->Command == SMB2_NEGOTIATE)
350 aux_max = 1;
351 else
352 aux_max = conn->vals->max_credits - conn->total_credits;
353 credits_granted = min_t(unsigned short, credits_requested, aux_max);
354
355 conn->total_credits += credits_granted;
356 work->credits_granted += credits_granted;
357
358 if (!req_hdr->NextCommand) {
359 /* Update CreditRequest in last request */
360 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
361 }
362 ksmbd_debug(SMB,
363 "credits: requested[%d] granted[%d] total_granted[%d]\n",
364 credits_requested, credits_granted,
365 conn->total_credits);
366 return 0;
367 }
368
369 /**
370 * init_chained_smb2_rsp() - initialize smb2 chained response
371 * @work: smb work containing smb response buffer
372 */
init_chained_smb2_rsp(struct ksmbd_work * work)373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
374 {
375 struct smb2_hdr *req = ksmbd_req_buf_next(work);
376 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
377 struct smb2_hdr *rsp_hdr;
378 struct smb2_hdr *rcv_hdr;
379 int next_hdr_offset = 0;
380 int len, new_len;
381
382 /* Len of this response = updated RFC len - offset of previous cmd
383 * in the compound rsp
384 */
385
386 /* Storing the current local FID which may be needed by subsequent
387 * command in the compound request
388 */
389 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
390 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
391 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
392 work->compound_sid = le64_to_cpu(rsp->SessionId);
393 }
394
395 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
396 next_hdr_offset = le32_to_cpu(req->NextCommand);
397
398 new_len = ALIGN(len, 8);
399 work->iov[work->iov_idx].iov_len += (new_len - len);
400 inc_rfc1001_len(work->response_buf, new_len - len);
401 rsp->NextCommand = cpu_to_le32(new_len);
402
403 work->next_smb2_rcv_hdr_off += next_hdr_offset;
404 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
405 work->next_smb2_rsp_hdr_off += new_len;
406 ksmbd_debug(SMB,
407 "Compound req new_len = %d rcv off = %d rsp off = %d\n",
408 new_len, work->next_smb2_rcv_hdr_off,
409 work->next_smb2_rsp_hdr_off);
410
411 rsp_hdr = ksmbd_resp_buf_next(work);
412 rcv_hdr = ksmbd_req_buf_next(work);
413
414 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
415 ksmbd_debug(SMB, "related flag should be set\n");
416 work->compound_fid = KSMBD_NO_FID;
417 work->compound_pfid = KSMBD_NO_FID;
418 }
419 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
420 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
421 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
422 rsp_hdr->Command = rcv_hdr->Command;
423
424 /*
425 * Message is response. We don't grant oplock yet.
426 */
427 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
428 SMB2_FLAGS_RELATED_OPERATIONS);
429 rsp_hdr->NextCommand = 0;
430 rsp_hdr->MessageId = rcv_hdr->MessageId;
431 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
432 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
433 rsp_hdr->SessionId = rcv_hdr->SessionId;
434 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
435 }
436
437 /**
438 * is_chained_smb2_message() - check for chained command
439 * @work: smb work containing smb request buffer
440 *
441 * Return: true if chained request, otherwise false
442 */
is_chained_smb2_message(struct ksmbd_work * work)443 bool is_chained_smb2_message(struct ksmbd_work *work)
444 {
445 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
446 unsigned int len, next_cmd;
447
448 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
449 return false;
450
451 hdr = ksmbd_req_buf_next(work);
452 next_cmd = le32_to_cpu(hdr->NextCommand);
453 if (next_cmd > 0) {
454 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
455 __SMB2_HEADER_STRUCTURE_SIZE >
456 get_rfc1002_len(work->request_buf)) {
457 pr_err("next command(%u) offset exceeds smb msg size\n",
458 next_cmd);
459 return false;
460 }
461
462 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
463 work->response_sz) {
464 pr_err("next response offset exceeds response buffer size\n");
465 return false;
466 }
467
468 ksmbd_debug(SMB, "got SMB2 chained command\n");
469 init_chained_smb2_rsp(work);
470 return true;
471 } else if (work->next_smb2_rcv_hdr_off) {
472 /*
473 * This is last request in chained command,
474 * align response to 8 byte
475 */
476 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
477 len = len - get_rfc1002_len(work->response_buf);
478 if (len) {
479 ksmbd_debug(SMB, "padding len %u\n", len);
480 work->iov[work->iov_idx].iov_len += len;
481 inc_rfc1001_len(work->response_buf, len);
482 }
483 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
484 }
485 return false;
486 }
487
488 /**
489 * init_smb2_rsp_hdr() - initialize smb2 response
490 * @work: smb work containing smb request buffer
491 *
492 * Return: 0
493 */
init_smb2_rsp_hdr(struct ksmbd_work * work)494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
495 {
496 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
497 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
498
499 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
500 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
501 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
502 rsp_hdr->Command = rcv_hdr->Command;
503
504 /*
505 * Message is response. We don't grant oplock yet.
506 */
507 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
508 rsp_hdr->NextCommand = 0;
509 rsp_hdr->MessageId = rcv_hdr->MessageId;
510 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
511 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
512 rsp_hdr->SessionId = rcv_hdr->SessionId;
513 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
514
515 return 0;
516 }
517
518 /**
519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer
520 * @work: smb work containing smb request buffer
521 *
522 * Return: 0 on success, otherwise -ENOMEM
523 */
smb2_allocate_rsp_buf(struct ksmbd_work * work)524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
525 {
526 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
527 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
528 size_t large_sz = small_sz + work->conn->vals->max_trans_size;
529 size_t sz = small_sz;
530 int cmd = le16_to_cpu(hdr->Command);
531
532 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
533 sz = large_sz;
534
535 if (cmd == SMB2_QUERY_INFO_HE) {
536 struct smb2_query_info_req *req;
537
538 if (get_rfc1002_len(work->request_buf) <
539 offsetof(struct smb2_query_info_req, OutputBufferLength))
540 return -EINVAL;
541
542 req = smb2_get_msg(work->request_buf);
543 if ((req->InfoType == SMB2_O_INFO_FILE &&
544 (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
545 req->FileInfoClass == FILE_ALL_INFORMATION)) ||
546 req->InfoType == SMB2_O_INFO_SECURITY)
547 sz = large_sz;
548 }
549
550 /* allocate large response buf for chained commands */
551 if (le32_to_cpu(hdr->NextCommand) > 0)
552 sz = large_sz;
553
554 work->response_buf = kvzalloc(sz, GFP_KERNEL);
555 if (!work->response_buf)
556 return -ENOMEM;
557
558 work->response_sz = sz;
559 return 0;
560 }
561
562 /**
563 * smb2_check_user_session() - check for valid session for a user
564 * @work: smb work containing smb request buffer
565 *
566 * Return: 0 on success, otherwise error
567 */
smb2_check_user_session(struct ksmbd_work * work)568 int smb2_check_user_session(struct ksmbd_work *work)
569 {
570 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
571 struct ksmbd_conn *conn = work->conn;
572 unsigned int cmd = le16_to_cpu(req_hdr->Command);
573 unsigned long long sess_id;
574
575 /*
576 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
577 * require a session id, so no need to validate user session's for
578 * these commands.
579 */
580 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
581 cmd == SMB2_SESSION_SETUP_HE)
582 return 0;
583
584 if (!ksmbd_conn_good(conn))
585 return -EIO;
586
587 sess_id = le64_to_cpu(req_hdr->SessionId);
588
589 /*
590 * If request is not the first in Compound request,
591 * Just validate session id in header with work->sess->id.
592 */
593 if (work->next_smb2_rcv_hdr_off) {
594 if (!work->sess) {
595 pr_err("The first operation in the compound does not have sess\n");
596 return -EINVAL;
597 }
598 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
599 pr_err("session id(%llu) is different with the first operation(%lld)\n",
600 sess_id, work->sess->id);
601 return -EINVAL;
602 }
603 return 1;
604 }
605
606 /* Check for validity of user session */
607 work->sess = ksmbd_session_lookup_all(conn, sess_id);
608 if (work->sess) {
609 ksmbd_user_session_get(work->sess);
610 return 1;
611 }
612 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
613 return -ENOENT;
614 }
615
616 /**
617 * smb2_get_name() - get filename string from on the wire smb format
618 * @src: source buffer
619 * @maxlen: maxlen of source string
620 * @local_nls: nls_table pointer
621 *
622 * Return: matching converted filename on success, otherwise error ptr
623 */
624 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)625 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
626 {
627 char *name;
628
629 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
630 if (IS_ERR(name)) {
631 pr_err("failed to get name %ld\n", PTR_ERR(name));
632 return name;
633 }
634
635 if (*name == '\\') {
636 pr_err("not allow directory name included leading slash\n");
637 kfree(name);
638 return ERR_PTR(-EINVAL);
639 }
640
641 ksmbd_conv_path_to_unix(name);
642 ksmbd_strip_last_slash(name);
643 return name;
644 }
645
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)646 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
647 {
648 struct ksmbd_conn *conn = work->conn;
649 int id;
650
651 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
652 if (id < 0) {
653 pr_err("Failed to alloc async message id\n");
654 return id;
655 }
656 work->asynchronous = true;
657 work->async_id = id;
658
659 ksmbd_debug(SMB,
660 "Send interim Response to inform async request id : %d\n",
661 work->async_id);
662
663 work->cancel_fn = fn;
664 work->cancel_argv = arg;
665
666 if (list_empty(&work->async_request_entry)) {
667 spin_lock(&conn->request_lock);
668 list_add_tail(&work->async_request_entry, &conn->async_requests);
669 spin_unlock(&conn->request_lock);
670 }
671
672 return 0;
673 }
674
release_async_work(struct ksmbd_work * work)675 void release_async_work(struct ksmbd_work *work)
676 {
677 struct ksmbd_conn *conn = work->conn;
678
679 spin_lock(&conn->request_lock);
680 list_del_init(&work->async_request_entry);
681 spin_unlock(&conn->request_lock);
682
683 work->asynchronous = 0;
684 work->cancel_fn = NULL;
685 kfree(work->cancel_argv);
686 work->cancel_argv = NULL;
687 if (work->async_id) {
688 ksmbd_release_id(&conn->async_ida, work->async_id);
689 work->async_id = 0;
690 }
691 }
692
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)693 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
694 {
695 struct smb2_hdr *rsp_hdr;
696 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
697
698 if (allocate_interim_rsp_buf(in_work)) {
699 pr_err("smb_allocate_rsp_buf failed!\n");
700 ksmbd_free_work_struct(in_work);
701 return;
702 }
703
704 in_work->conn = work->conn;
705 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
706 __SMB2_HEADER_STRUCTURE_SIZE);
707
708 rsp_hdr = smb2_get_msg(in_work->response_buf);
709 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
710 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
711 smb2_set_err_rsp(in_work);
712 rsp_hdr->Status = status;
713
714 ksmbd_conn_write(in_work);
715 ksmbd_free_work_struct(in_work);
716 }
717
smb2_get_reparse_tag_special_file(umode_t mode)718 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
719 {
720 if (S_ISDIR(mode) || S_ISREG(mode))
721 return 0;
722
723 if (S_ISLNK(mode))
724 return IO_REPARSE_TAG_LX_SYMLINK_LE;
725 else if (S_ISFIFO(mode))
726 return IO_REPARSE_TAG_LX_FIFO_LE;
727 else if (S_ISSOCK(mode))
728 return IO_REPARSE_TAG_AF_UNIX_LE;
729 else if (S_ISCHR(mode))
730 return IO_REPARSE_TAG_LX_CHR_LE;
731 else if (S_ISBLK(mode))
732 return IO_REPARSE_TAG_LX_BLK_LE;
733
734 return 0;
735 }
736
737 /**
738 * smb2_get_dos_mode() - get file mode in dos format from unix mode
739 * @stat: kstat containing file mode
740 * @attribute: attribute flags
741 *
742 * Return: converted dos mode
743 */
smb2_get_dos_mode(struct kstat * stat,int attribute)744 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
745 {
746 int attr = 0;
747
748 if (S_ISDIR(stat->mode)) {
749 attr = FILE_ATTRIBUTE_DIRECTORY |
750 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
751 } else {
752 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
753 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
754 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
755 FILE_SUPPORTS_SPARSE_FILES))
756 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
757
758 if (smb2_get_reparse_tag_special_file(stat->mode))
759 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
760 }
761
762 return attr;
763 }
764
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)765 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
766 __le16 hash_id)
767 {
768 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
769 pneg_ctxt->DataLength = cpu_to_le16(38);
770 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
771 pneg_ctxt->Reserved = cpu_to_le32(0);
772 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
773 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
774 pneg_ctxt->HashAlgorithms = hash_id;
775 }
776
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)777 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
778 __le16 cipher_type)
779 {
780 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
781 pneg_ctxt->DataLength = cpu_to_le16(4);
782 pneg_ctxt->Reserved = cpu_to_le32(0);
783 pneg_ctxt->CipherCount = cpu_to_le16(1);
784 pneg_ctxt->Ciphers[0] = cipher_type;
785 }
786
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)787 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
788 __le16 sign_algo)
789 {
790 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
791 pneg_ctxt->DataLength =
792 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
793 - sizeof(struct smb2_neg_context));
794 pneg_ctxt->Reserved = cpu_to_le32(0);
795 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
796 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
797 }
798
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)799 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
800 {
801 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
802 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
803 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
804 pneg_ctxt->Name[0] = 0x93;
805 pneg_ctxt->Name[1] = 0xAD;
806 pneg_ctxt->Name[2] = 0x25;
807 pneg_ctxt->Name[3] = 0x50;
808 pneg_ctxt->Name[4] = 0x9C;
809 pneg_ctxt->Name[5] = 0xB4;
810 pneg_ctxt->Name[6] = 0x11;
811 pneg_ctxt->Name[7] = 0xE7;
812 pneg_ctxt->Name[8] = 0xB4;
813 pneg_ctxt->Name[9] = 0x23;
814 pneg_ctxt->Name[10] = 0x83;
815 pneg_ctxt->Name[11] = 0xDE;
816 pneg_ctxt->Name[12] = 0x96;
817 pneg_ctxt->Name[13] = 0x8B;
818 pneg_ctxt->Name[14] = 0xCD;
819 pneg_ctxt->Name[15] = 0x7C;
820 }
821
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)822 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
823 struct smb2_negotiate_rsp *rsp)
824 {
825 char * const pneg_ctxt = (char *)rsp +
826 le32_to_cpu(rsp->NegotiateContextOffset);
827 int neg_ctxt_cnt = 1;
828 int ctxt_size;
829
830 ksmbd_debug(SMB,
831 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
832 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
833 conn->preauth_info->Preauth_HashId);
834 ctxt_size = sizeof(struct smb2_preauth_neg_context);
835
836 if (conn->cipher_type) {
837 /* Round to 8 byte boundary */
838 ctxt_size = round_up(ctxt_size, 8);
839 ksmbd_debug(SMB,
840 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
841 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
842 (pneg_ctxt + ctxt_size),
843 conn->cipher_type);
844 neg_ctxt_cnt++;
845 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
846 }
847
848 /* compression context not yet supported */
849 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
850
851 if (conn->posix_ext_supported) {
852 ctxt_size = round_up(ctxt_size, 8);
853 ksmbd_debug(SMB,
854 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
855 build_posix_ctxt((struct smb2_posix_neg_context *)
856 (pneg_ctxt + ctxt_size));
857 neg_ctxt_cnt++;
858 ctxt_size += sizeof(struct smb2_posix_neg_context);
859 }
860
861 if (conn->signing_negotiated) {
862 ctxt_size = round_up(ctxt_size, 8);
863 ksmbd_debug(SMB,
864 "assemble SMB2_SIGNING_CAPABILITIES context\n");
865 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
866 (pneg_ctxt + ctxt_size),
867 conn->signing_algorithm);
868 neg_ctxt_cnt++;
869 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
870 }
871
872 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
873 return ctxt_size + AUTH_GSS_PADDING;
874 }
875
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)876 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
877 struct smb2_preauth_neg_context *pneg_ctxt,
878 int ctxt_len)
879 {
880 /*
881 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
882 * which may not be present. Only check for used HashAlgorithms[1].
883 */
884 if (ctxt_len <
885 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
886 return STATUS_INVALID_PARAMETER;
887
888 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
889 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
890
891 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
892 return STATUS_SUCCESS;
893 }
894
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)895 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
896 struct smb2_encryption_neg_context *pneg_ctxt,
897 int ctxt_len)
898 {
899 int cph_cnt;
900 int i, cphs_size;
901
902 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
903 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
904 return;
905 }
906
907 conn->cipher_type = 0;
908
909 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
910 cphs_size = cph_cnt * sizeof(__le16);
911
912 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
913 ctxt_len) {
914 pr_err("Invalid cipher count(%d)\n", cph_cnt);
915 return;
916 }
917
918 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
919 return;
920
921 for (i = 0; i < cph_cnt; i++) {
922 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
923 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
924 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
925 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
926 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
927 pneg_ctxt->Ciphers[i]);
928 conn->cipher_type = pneg_ctxt->Ciphers[i];
929 break;
930 }
931 }
932 }
933
934 /**
935 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
936 * @conn: smb connection
937 *
938 * Return: true if connection should be encrypted, else false
939 */
smb3_encryption_negotiated(struct ksmbd_conn * conn)940 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
941 {
942 if (!conn->ops->generate_encryptionkey)
943 return false;
944
945 /*
946 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
947 * SMB 3.1.1 uses the cipher_type field.
948 */
949 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
950 conn->cipher_type;
951 }
952
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)953 static void decode_compress_ctxt(struct ksmbd_conn *conn,
954 struct smb2_compression_capabilities_context *pneg_ctxt)
955 {
956 conn->compress_algorithm = SMB3_COMPRESS_NONE;
957 }
958
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)959 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
960 struct smb2_signing_capabilities *pneg_ctxt,
961 int ctxt_len)
962 {
963 int sign_algo_cnt;
964 int i, sign_alos_size;
965
966 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
967 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
968 return;
969 }
970
971 conn->signing_negotiated = false;
972 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
973 sign_alos_size = sign_algo_cnt * sizeof(__le16);
974
975 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
976 ctxt_len) {
977 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
978 return;
979 }
980
981 for (i = 0; i < sign_algo_cnt; i++) {
982 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
983 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
984 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
985 pneg_ctxt->SigningAlgorithms[i]);
986 conn->signing_negotiated = true;
987 conn->signing_algorithm =
988 pneg_ctxt->SigningAlgorithms[i];
989 break;
990 }
991 }
992 }
993
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)994 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
995 struct smb2_negotiate_req *req,
996 unsigned int len_of_smb)
997 {
998 /* +4 is to account for the RFC1001 len field */
999 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1000 int i = 0, len_of_ctxts;
1001 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1002 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1003 __le32 status = STATUS_INVALID_PARAMETER;
1004
1005 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1006 if (len_of_smb <= offset) {
1007 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1008 return status;
1009 }
1010
1011 len_of_ctxts = len_of_smb - offset;
1012
1013 while (i++ < neg_ctxt_cnt) {
1014 int clen, ctxt_len;
1015
1016 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1017 break;
1018
1019 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1020 clen = le16_to_cpu(pctx->DataLength);
1021 ctxt_len = clen + sizeof(struct smb2_neg_context);
1022
1023 if (ctxt_len > len_of_ctxts)
1024 break;
1025
1026 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1027 ksmbd_debug(SMB,
1028 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1029 if (conn->preauth_info->Preauth_HashId)
1030 break;
1031
1032 status = decode_preauth_ctxt(conn,
1033 (struct smb2_preauth_neg_context *)pctx,
1034 ctxt_len);
1035 if (status != STATUS_SUCCESS)
1036 break;
1037 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1038 ksmbd_debug(SMB,
1039 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1040 if (conn->cipher_type)
1041 break;
1042
1043 decode_encrypt_ctxt(conn,
1044 (struct smb2_encryption_neg_context *)pctx,
1045 ctxt_len);
1046 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1047 ksmbd_debug(SMB,
1048 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1049 if (conn->compress_algorithm)
1050 break;
1051
1052 decode_compress_ctxt(conn,
1053 (struct smb2_compression_capabilities_context *)pctx);
1054 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1055 ksmbd_debug(SMB,
1056 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1057 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1058 ksmbd_debug(SMB,
1059 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1060 conn->posix_ext_supported = true;
1061 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1062 ksmbd_debug(SMB,
1063 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1064
1065 decode_sign_cap_ctxt(conn,
1066 (struct smb2_signing_capabilities *)pctx,
1067 ctxt_len);
1068 }
1069
1070 /* offsets must be 8 byte aligned */
1071 offset = (ctxt_len + 7) & ~0x7;
1072 len_of_ctxts -= offset;
1073 }
1074 return status;
1075 }
1076
1077 /**
1078 * smb2_handle_negotiate() - handler for smb2 negotiate command
1079 * @work: smb work containing smb request buffer
1080 *
1081 * Return: 0
1082 */
smb2_handle_negotiate(struct ksmbd_work * work)1083 int smb2_handle_negotiate(struct ksmbd_work *work)
1084 {
1085 struct ksmbd_conn *conn = work->conn;
1086 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1087 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1088 int rc = 0;
1089 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1090 __le32 status;
1091
1092 ksmbd_debug(SMB, "Received negotiate request\n");
1093 conn->need_neg = false;
1094 if (ksmbd_conn_good(conn)) {
1095 pr_err("conn->tcp_status is already in CifsGood State\n");
1096 work->send_no_response = 1;
1097 return rc;
1098 }
1099
1100 smb2_buf_len = get_rfc1002_len(work->request_buf);
1101 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1102 if (smb2_neg_size > smb2_buf_len) {
1103 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1104 rc = -EINVAL;
1105 goto err_out;
1106 }
1107
1108 if (req->DialectCount == 0) {
1109 pr_err("malformed packet\n");
1110 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1111 rc = -EINVAL;
1112 goto err_out;
1113 }
1114
1115 if (conn->dialect == SMB311_PROT_ID) {
1116 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1117
1118 if (smb2_buf_len < nego_ctxt_off) {
1119 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1120 rc = -EINVAL;
1121 goto err_out;
1122 }
1123
1124 if (smb2_neg_size > nego_ctxt_off) {
1125 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1126 rc = -EINVAL;
1127 goto err_out;
1128 }
1129
1130 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1131 nego_ctxt_off) {
1132 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1133 rc = -EINVAL;
1134 goto err_out;
1135 }
1136 } else {
1137 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1138 smb2_buf_len) {
1139 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1140 rc = -EINVAL;
1141 goto err_out;
1142 }
1143 }
1144
1145 conn->cli_cap = le32_to_cpu(req->Capabilities);
1146 switch (conn->dialect) {
1147 case SMB311_PROT_ID:
1148 conn->preauth_info =
1149 kzalloc(sizeof(struct preauth_integrity_info),
1150 GFP_KERNEL);
1151 if (!conn->preauth_info) {
1152 rc = -ENOMEM;
1153 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154 goto err_out;
1155 }
1156
1157 status = deassemble_neg_contexts(conn, req,
1158 get_rfc1002_len(work->request_buf));
1159 if (status != STATUS_SUCCESS) {
1160 pr_err("deassemble_neg_contexts error(0x%x)\n",
1161 status);
1162 rsp->hdr.Status = status;
1163 rc = -EINVAL;
1164 kfree(conn->preauth_info);
1165 conn->preauth_info = NULL;
1166 goto err_out;
1167 }
1168
1169 rc = init_smb3_11_server(conn);
1170 if (rc < 0) {
1171 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1172 kfree(conn->preauth_info);
1173 conn->preauth_info = NULL;
1174 goto err_out;
1175 }
1176
1177 ksmbd_gen_preauth_integrity_hash(conn,
1178 work->request_buf,
1179 conn->preauth_info->Preauth_HashValue);
1180 rsp->NegotiateContextOffset =
1181 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1182 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1183 break;
1184 case SMB302_PROT_ID:
1185 init_smb3_02_server(conn);
1186 break;
1187 case SMB30_PROT_ID:
1188 init_smb3_0_server(conn);
1189 break;
1190 case SMB21_PROT_ID:
1191 init_smb2_1_server(conn);
1192 break;
1193 case SMB2X_PROT_ID:
1194 case BAD_PROT_ID:
1195 default:
1196 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1197 conn->dialect);
1198 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1199 rc = -EINVAL;
1200 goto err_out;
1201 }
1202 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1203
1204 /* For stats */
1205 conn->connection_type = conn->dialect;
1206
1207 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1208 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1209 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1210
1211 memcpy(conn->ClientGUID, req->ClientGUID,
1212 SMB2_CLIENT_GUID_SIZE);
1213 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1214
1215 rsp->StructureSize = cpu_to_le16(65);
1216 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1217 /* Not setting conn guid rsp->ServerGUID, as it
1218 * not used by client for identifying server
1219 */
1220 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1221
1222 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1223 rsp->ServerStartTime = 0;
1224 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1225 le32_to_cpu(rsp->NegotiateContextOffset),
1226 le16_to_cpu(rsp->NegotiateContextCount));
1227
1228 rsp->SecurityBufferOffset = cpu_to_le16(128);
1229 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1230 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1231 le16_to_cpu(rsp->SecurityBufferOffset));
1232
1233 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1234 conn->use_spnego = true;
1235
1236 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1237 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1238 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1239 conn->sign = true;
1240 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1241 server_conf.enforced_signing = true;
1242 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1243 conn->sign = true;
1244 }
1245
1246 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1247 ksmbd_conn_set_need_negotiate(conn);
1248
1249 err_out:
1250 if (rc)
1251 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1252
1253 if (!rc)
1254 rc = ksmbd_iov_pin_rsp(work, rsp,
1255 sizeof(struct smb2_negotiate_rsp) +
1256 AUTH_GSS_LENGTH + neg_ctxt_len);
1257 if (rc < 0)
1258 smb2_set_err_rsp(work);
1259 return rc;
1260 }
1261
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1262 static int alloc_preauth_hash(struct ksmbd_session *sess,
1263 struct ksmbd_conn *conn)
1264 {
1265 if (sess->Preauth_HashValue)
1266 return 0;
1267
1268 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1269 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1270 if (!sess->Preauth_HashValue)
1271 return -ENOMEM;
1272
1273 return 0;
1274 }
1275
generate_preauth_hash(struct ksmbd_work * work)1276 static int generate_preauth_hash(struct ksmbd_work *work)
1277 {
1278 struct ksmbd_conn *conn = work->conn;
1279 struct ksmbd_session *sess = work->sess;
1280 u8 *preauth_hash;
1281
1282 if (conn->dialect != SMB311_PROT_ID)
1283 return 0;
1284
1285 if (conn->binding) {
1286 struct preauth_session *preauth_sess;
1287
1288 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1289 if (!preauth_sess) {
1290 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1291 if (!preauth_sess)
1292 return -ENOMEM;
1293 }
1294
1295 preauth_hash = preauth_sess->Preauth_HashValue;
1296 } else {
1297 if (!sess->Preauth_HashValue)
1298 if (alloc_preauth_hash(sess, conn))
1299 return -ENOMEM;
1300 preauth_hash = sess->Preauth_HashValue;
1301 }
1302
1303 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1304 return 0;
1305 }
1306
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1307 static int decode_negotiation_token(struct ksmbd_conn *conn,
1308 struct negotiate_message *negblob,
1309 size_t sz)
1310 {
1311 if (!conn->use_spnego)
1312 return -EINVAL;
1313
1314 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1315 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1316 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1317 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1318 conn->use_spnego = false;
1319 }
1320 }
1321 return 0;
1322 }
1323
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1324 static int ntlm_negotiate(struct ksmbd_work *work,
1325 struct negotiate_message *negblob,
1326 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1327 {
1328 struct challenge_message *chgblob;
1329 unsigned char *spnego_blob = NULL;
1330 u16 spnego_blob_len;
1331 char *neg_blob;
1332 int sz, rc;
1333
1334 ksmbd_debug(SMB, "negotiate phase\n");
1335 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1336 if (rc)
1337 return rc;
1338
1339 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1340 chgblob =
1341 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1342 memset(chgblob, 0, sizeof(struct challenge_message));
1343
1344 if (!work->conn->use_spnego) {
1345 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1346 if (sz < 0)
1347 return -ENOMEM;
1348
1349 rsp->SecurityBufferLength = cpu_to_le16(sz);
1350 return 0;
1351 }
1352
1353 sz = sizeof(struct challenge_message);
1354 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1355
1356 neg_blob = kzalloc(sz, GFP_KERNEL);
1357 if (!neg_blob)
1358 return -ENOMEM;
1359
1360 chgblob = (struct challenge_message *)neg_blob;
1361 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1362 if (sz < 0) {
1363 rc = -ENOMEM;
1364 goto out;
1365 }
1366
1367 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1368 neg_blob, sz);
1369 if (rc) {
1370 rc = -ENOMEM;
1371 goto out;
1372 }
1373
1374 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1375 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1376 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1377
1378 out:
1379 kfree(spnego_blob);
1380 kfree(neg_blob);
1381 return rc;
1382 }
1383
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1384 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1385 struct smb2_sess_setup_req *req)
1386 {
1387 int sz;
1388
1389 if (conn->use_spnego && conn->mechToken)
1390 return (struct authenticate_message *)conn->mechToken;
1391
1392 sz = le16_to_cpu(req->SecurityBufferOffset);
1393 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1394 + sz);
1395 }
1396
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1397 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1398 struct smb2_sess_setup_req *req)
1399 {
1400 struct authenticate_message *authblob;
1401 struct ksmbd_user *user;
1402 char *name;
1403 unsigned int name_off, name_len, secbuf_len;
1404
1405 if (conn->use_spnego && conn->mechToken)
1406 secbuf_len = conn->mechTokenLen;
1407 else
1408 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1409 if (secbuf_len < sizeof(struct authenticate_message)) {
1410 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1411 return NULL;
1412 }
1413 authblob = user_authblob(conn, req);
1414 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1415 name_len = le16_to_cpu(authblob->UserName.Length);
1416
1417 if (secbuf_len < (u64)name_off + name_len)
1418 return NULL;
1419
1420 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1421 name_len,
1422 true,
1423 conn->local_nls);
1424 if (IS_ERR(name)) {
1425 pr_err("cannot allocate memory\n");
1426 return NULL;
1427 }
1428
1429 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1430 user = ksmbd_login_user(name);
1431 kfree(name);
1432 return user;
1433 }
1434
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1435 static int ntlm_authenticate(struct ksmbd_work *work,
1436 struct smb2_sess_setup_req *req,
1437 struct smb2_sess_setup_rsp *rsp)
1438 {
1439 struct ksmbd_conn *conn = work->conn;
1440 struct ksmbd_session *sess = work->sess;
1441 struct channel *chann = NULL;
1442 struct ksmbd_user *user;
1443 u64 prev_id;
1444 int sz, rc;
1445
1446 ksmbd_debug(SMB, "authenticate phase\n");
1447 if (conn->use_spnego) {
1448 unsigned char *spnego_blob;
1449 u16 spnego_blob_len;
1450
1451 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1452 &spnego_blob_len,
1453 0);
1454 if (rc)
1455 return -ENOMEM;
1456
1457 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1458 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1459 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1460 kfree(spnego_blob);
1461 }
1462
1463 user = session_user(conn, req);
1464 if (!user) {
1465 ksmbd_debug(SMB, "Unknown user name or an error\n");
1466 return -EPERM;
1467 }
1468
1469 /* Check for previous session */
1470 prev_id = le64_to_cpu(req->PreviousSessionId);
1471 if (prev_id && prev_id != sess->id)
1472 destroy_previous_session(conn, user, prev_id);
1473
1474 if (sess->state == SMB2_SESSION_VALID) {
1475 /*
1476 * Reuse session if anonymous try to connect
1477 * on reauthetication.
1478 */
1479 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1480 ksmbd_free_user(user);
1481 return 0;
1482 }
1483
1484 if (!ksmbd_compare_user(sess->user, user)) {
1485 ksmbd_free_user(user);
1486 return -EPERM;
1487 }
1488 ksmbd_free_user(user);
1489 } else {
1490 sess->user = user;
1491 }
1492
1493 if (conn->binding == false && user_guest(sess->user)) {
1494 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1495 } else {
1496 struct authenticate_message *authblob;
1497
1498 authblob = user_authblob(conn, req);
1499 if (conn->use_spnego && conn->mechToken)
1500 sz = conn->mechTokenLen;
1501 else
1502 sz = le16_to_cpu(req->SecurityBufferLength);
1503 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1504 if (rc) {
1505 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1506 ksmbd_debug(SMB, "authentication failed\n");
1507 return -EPERM;
1508 }
1509 }
1510
1511 /*
1512 * If session state is SMB2_SESSION_VALID, We can assume
1513 * that it is reauthentication. And the user/password
1514 * has been verified, so return it here.
1515 */
1516 if (sess->state == SMB2_SESSION_VALID) {
1517 if (conn->binding)
1518 goto binding_session;
1519 return 0;
1520 }
1521
1522 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1523 (conn->sign || server_conf.enforced_signing)) ||
1524 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1525 sess->sign = true;
1526
1527 if (smb3_encryption_negotiated(conn) &&
1528 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1529 rc = conn->ops->generate_encryptionkey(conn, sess);
1530 if (rc) {
1531 ksmbd_debug(SMB,
1532 "SMB3 encryption key generation failed\n");
1533 return -EINVAL;
1534 }
1535 sess->enc = true;
1536 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1537 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1538 /*
1539 * signing is disable if encryption is enable
1540 * on this session
1541 */
1542 sess->sign = false;
1543 }
1544
1545 binding_session:
1546 if (conn->dialect >= SMB30_PROT_ID) {
1547 chann = lookup_chann_list(sess, conn);
1548 if (!chann) {
1549 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1550 if (!chann)
1551 return -ENOMEM;
1552
1553 chann->conn = conn;
1554 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1555 }
1556 }
1557
1558 if (conn->ops->generate_signingkey) {
1559 rc = conn->ops->generate_signingkey(sess, conn);
1560 if (rc) {
1561 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1562 return -EINVAL;
1563 }
1564 }
1565
1566 if (!ksmbd_conn_lookup_dialect(conn)) {
1567 pr_err("fail to verify the dialect\n");
1568 return -ENOENT;
1569 }
1570 return 0;
1571 }
1572
1573 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1574 static int krb5_authenticate(struct ksmbd_work *work,
1575 struct smb2_sess_setup_req *req,
1576 struct smb2_sess_setup_rsp *rsp)
1577 {
1578 struct ksmbd_conn *conn = work->conn;
1579 struct ksmbd_session *sess = work->sess;
1580 char *in_blob, *out_blob;
1581 struct channel *chann = NULL;
1582 u64 prev_sess_id;
1583 int in_len, out_len;
1584 int retval;
1585
1586 in_blob = (char *)&req->hdr.ProtocolId +
1587 le16_to_cpu(req->SecurityBufferOffset);
1588 in_len = le16_to_cpu(req->SecurityBufferLength);
1589 out_blob = (char *)&rsp->hdr.ProtocolId +
1590 le16_to_cpu(rsp->SecurityBufferOffset);
1591 out_len = work->response_sz -
1592 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1593
1594 /* Check previous session */
1595 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1596 if (prev_sess_id && prev_sess_id != sess->id)
1597 destroy_previous_session(conn, sess->user, prev_sess_id);
1598
1599 if (sess->state == SMB2_SESSION_VALID)
1600 ksmbd_free_user(sess->user);
1601
1602 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1603 out_blob, &out_len);
1604 if (retval) {
1605 ksmbd_debug(SMB, "krb5 authentication failed\n");
1606 return -EINVAL;
1607 }
1608 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1609
1610 if ((conn->sign || server_conf.enforced_signing) ||
1611 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1612 sess->sign = true;
1613
1614 if (smb3_encryption_negotiated(conn)) {
1615 retval = conn->ops->generate_encryptionkey(conn, sess);
1616 if (retval) {
1617 ksmbd_debug(SMB,
1618 "SMB3 encryption key generation failed\n");
1619 return -EINVAL;
1620 }
1621 sess->enc = true;
1622 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1623 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1624 sess->sign = false;
1625 }
1626
1627 if (conn->dialect >= SMB30_PROT_ID) {
1628 chann = lookup_chann_list(sess, conn);
1629 if (!chann) {
1630 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1631 if (!chann)
1632 return -ENOMEM;
1633
1634 chann->conn = conn;
1635 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1636 }
1637 }
1638
1639 if (conn->ops->generate_signingkey) {
1640 retval = conn->ops->generate_signingkey(sess, conn);
1641 if (retval) {
1642 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1643 return -EINVAL;
1644 }
1645 }
1646
1647 if (!ksmbd_conn_lookup_dialect(conn)) {
1648 pr_err("fail to verify the dialect\n");
1649 return -ENOENT;
1650 }
1651 return 0;
1652 }
1653 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1654 static int krb5_authenticate(struct ksmbd_work *work,
1655 struct smb2_sess_setup_req *req,
1656 struct smb2_sess_setup_rsp *rsp)
1657 {
1658 return -EOPNOTSUPP;
1659 }
1660 #endif
1661
smb2_sess_setup(struct ksmbd_work * work)1662 int smb2_sess_setup(struct ksmbd_work *work)
1663 {
1664 struct ksmbd_conn *conn = work->conn;
1665 struct smb2_sess_setup_req *req;
1666 struct smb2_sess_setup_rsp *rsp;
1667 struct ksmbd_session *sess;
1668 struct negotiate_message *negblob;
1669 unsigned int negblob_len, negblob_off;
1670 int rc = 0;
1671
1672 ksmbd_debug(SMB, "Received request for session setup\n");
1673
1674 WORK_BUFFERS(work, req, rsp);
1675
1676 rsp->StructureSize = cpu_to_le16(9);
1677 rsp->SessionFlags = 0;
1678 rsp->SecurityBufferOffset = cpu_to_le16(72);
1679 rsp->SecurityBufferLength = 0;
1680
1681 ksmbd_conn_lock(conn);
1682 if (!req->hdr.SessionId) {
1683 sess = ksmbd_smb2_session_create();
1684 if (!sess) {
1685 rc = -ENOMEM;
1686 goto out_err;
1687 }
1688 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1689 rc = ksmbd_session_register(conn, sess);
1690 if (rc)
1691 goto out_err;
1692
1693 conn->binding = false;
1694 } else if (conn->dialect >= SMB30_PROT_ID &&
1695 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1696 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1697 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1698
1699 sess = ksmbd_session_lookup_slowpath(sess_id);
1700 if (!sess) {
1701 rc = -ENOENT;
1702 goto out_err;
1703 }
1704
1705 if (conn->dialect != sess->dialect) {
1706 rc = -EINVAL;
1707 goto out_err;
1708 }
1709
1710 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1711 rc = -EINVAL;
1712 goto out_err;
1713 }
1714
1715 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1716 SMB2_CLIENT_GUID_SIZE)) {
1717 rc = -ENOENT;
1718 goto out_err;
1719 }
1720
1721 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1722 rc = -EACCES;
1723 goto out_err;
1724 }
1725
1726 if (sess->state == SMB2_SESSION_EXPIRED) {
1727 rc = -EFAULT;
1728 goto out_err;
1729 }
1730
1731 if (ksmbd_conn_need_reconnect(conn)) {
1732 rc = -EFAULT;
1733 sess = NULL;
1734 goto out_err;
1735 }
1736
1737 if (ksmbd_session_lookup(conn, sess_id)) {
1738 rc = -EACCES;
1739 goto out_err;
1740 }
1741
1742 if (user_guest(sess->user)) {
1743 rc = -EOPNOTSUPP;
1744 goto out_err;
1745 }
1746
1747 conn->binding = true;
1748 ksmbd_user_session_get(sess);
1749 } else if ((conn->dialect < SMB30_PROT_ID ||
1750 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1751 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1752 sess = NULL;
1753 rc = -EACCES;
1754 goto out_err;
1755 } else {
1756 sess = ksmbd_session_lookup(conn,
1757 le64_to_cpu(req->hdr.SessionId));
1758 if (!sess) {
1759 rc = -ENOENT;
1760 goto out_err;
1761 }
1762
1763 if (sess->state == SMB2_SESSION_EXPIRED) {
1764 rc = -EFAULT;
1765 goto out_err;
1766 }
1767
1768 if (ksmbd_conn_need_reconnect(conn)) {
1769 rc = -EFAULT;
1770 sess = NULL;
1771 goto out_err;
1772 }
1773
1774 conn->binding = false;
1775 ksmbd_user_session_get(sess);
1776 }
1777 work->sess = sess;
1778
1779 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1780 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1781 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1782 rc = -EINVAL;
1783 goto out_err;
1784 }
1785
1786 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1787 negblob_off);
1788
1789 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1790 if (conn->mechToken) {
1791 negblob = (struct negotiate_message *)conn->mechToken;
1792 negblob_len = conn->mechTokenLen;
1793 }
1794 }
1795
1796 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1797 rc = -EINVAL;
1798 goto out_err;
1799 }
1800
1801 if (server_conf.auth_mechs & conn->auth_mechs) {
1802 rc = generate_preauth_hash(work);
1803 if (rc)
1804 goto out_err;
1805
1806 if (conn->preferred_auth_mech &
1807 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1808 rc = krb5_authenticate(work, req, rsp);
1809 if (rc) {
1810 rc = -EINVAL;
1811 goto out_err;
1812 }
1813
1814 if (!ksmbd_conn_need_reconnect(conn)) {
1815 ksmbd_conn_set_good(conn);
1816 sess->state = SMB2_SESSION_VALID;
1817 }
1818 kfree(sess->Preauth_HashValue);
1819 sess->Preauth_HashValue = NULL;
1820 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1821 if (negblob->MessageType == NtLmNegotiate) {
1822 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1823 if (rc)
1824 goto out_err;
1825 rsp->hdr.Status =
1826 STATUS_MORE_PROCESSING_REQUIRED;
1827 } else if (negblob->MessageType == NtLmAuthenticate) {
1828 rc = ntlm_authenticate(work, req, rsp);
1829 if (rc)
1830 goto out_err;
1831
1832 if (!ksmbd_conn_need_reconnect(conn)) {
1833 ksmbd_conn_set_good(conn);
1834 sess->state = SMB2_SESSION_VALID;
1835 }
1836 if (conn->binding) {
1837 struct preauth_session *preauth_sess;
1838
1839 preauth_sess =
1840 ksmbd_preauth_session_lookup(conn, sess->id);
1841 if (preauth_sess) {
1842 list_del(&preauth_sess->preauth_entry);
1843 kfree(preauth_sess);
1844 }
1845 }
1846 kfree(sess->Preauth_HashValue);
1847 sess->Preauth_HashValue = NULL;
1848 } else {
1849 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1850 le32_to_cpu(negblob->MessageType));
1851 rc = -EINVAL;
1852 }
1853 } else {
1854 /* TODO: need one more negotiation */
1855 pr_err("Not support the preferred authentication\n");
1856 rc = -EINVAL;
1857 }
1858 } else {
1859 pr_err("Not support authentication\n");
1860 rc = -EINVAL;
1861 }
1862
1863 out_err:
1864 if (rc == -EINVAL)
1865 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1866 else if (rc == -ENOENT)
1867 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1868 else if (rc == -EACCES)
1869 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1870 else if (rc == -EFAULT)
1871 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1872 else if (rc == -ENOMEM)
1873 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1874 else if (rc == -EOPNOTSUPP)
1875 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1876 else if (rc)
1877 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1878
1879 if (conn->use_spnego && conn->mechToken) {
1880 kfree(conn->mechToken);
1881 conn->mechToken = NULL;
1882 }
1883
1884 if (rc < 0) {
1885 /*
1886 * SecurityBufferOffset should be set to zero
1887 * in session setup error response.
1888 */
1889 rsp->SecurityBufferOffset = 0;
1890
1891 if (sess) {
1892 bool try_delay = false;
1893
1894 /*
1895 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1896 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1897 * failure to make it harder to send enough random connection requests
1898 * to break into a server.
1899 */
1900 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1901 try_delay = true;
1902
1903 sess->last_active = jiffies;
1904 sess->state = SMB2_SESSION_EXPIRED;
1905 if (try_delay) {
1906 ksmbd_conn_set_need_reconnect(conn);
1907 ssleep(5);
1908 ksmbd_conn_set_need_negotiate(conn);
1909 }
1910 }
1911 smb2_set_err_rsp(work);
1912 } else {
1913 unsigned int iov_len;
1914
1915 if (rsp->SecurityBufferLength)
1916 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1917 le16_to_cpu(rsp->SecurityBufferLength);
1918 else
1919 iov_len = sizeof(struct smb2_sess_setup_rsp);
1920 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1921 if (rc)
1922 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1923 }
1924
1925 ksmbd_conn_unlock(conn);
1926 return rc;
1927 }
1928
1929 /**
1930 * smb2_tree_connect() - handler for smb2 tree connect command
1931 * @work: smb work containing smb request buffer
1932 *
1933 * Return: 0 on success, otherwise error
1934 */
smb2_tree_connect(struct ksmbd_work * work)1935 int smb2_tree_connect(struct ksmbd_work *work)
1936 {
1937 struct ksmbd_conn *conn = work->conn;
1938 struct smb2_tree_connect_req *req;
1939 struct smb2_tree_connect_rsp *rsp;
1940 struct ksmbd_session *sess = work->sess;
1941 char *treename = NULL, *name = NULL;
1942 struct ksmbd_tree_conn_status status;
1943 struct ksmbd_share_config *share = NULL;
1944 int rc = -EINVAL;
1945
1946 WORK_BUFFERS(work, req, rsp);
1947
1948 treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),
1949 le16_to_cpu(req->PathLength), true,
1950 conn->local_nls);
1951 if (IS_ERR(treename)) {
1952 pr_err("treename is NULL\n");
1953 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1954 goto out_err1;
1955 }
1956
1957 name = ksmbd_extract_sharename(conn->um, treename);
1958 if (IS_ERR(name)) {
1959 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1960 goto out_err1;
1961 }
1962
1963 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1964 name, treename);
1965
1966 status = ksmbd_tree_conn_connect(work, name);
1967 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1968 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1969 else
1970 goto out_err1;
1971
1972 share = status.tree_conn->share_conf;
1973 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1974 ksmbd_debug(SMB, "IPC share path request\n");
1975 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1976 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1977 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1978 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1979 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1980 FILE_SYNCHRONIZE_LE;
1981 } else {
1982 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1983 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1984 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1985 if (test_tree_conn_flag(status.tree_conn,
1986 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1987 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1988 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1989 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1990 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1991 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1992 FILE_SYNCHRONIZE_LE;
1993 }
1994 }
1995
1996 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1997 if (conn->posix_ext_supported)
1998 status.tree_conn->posix_extensions = true;
1999
2000 write_lock(&sess->tree_conns_lock);
2001 status.tree_conn->t_state = TREE_CONNECTED;
2002 write_unlock(&sess->tree_conns_lock);
2003 rsp->StructureSize = cpu_to_le16(16);
2004 out_err1:
2005 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&
2006 test_share_config_flag(share,
2007 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
2008 rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
2009 else
2010 rsp->Capabilities = 0;
2011 rsp->Reserved = 0;
2012 /* default manual caching */
2013 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2014
2015 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2016 if (rc)
2017 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2018
2019 if (!IS_ERR(treename))
2020 kfree(treename);
2021 if (!IS_ERR(name))
2022 kfree(name);
2023
2024 switch (status.ret) {
2025 case KSMBD_TREE_CONN_STATUS_OK:
2026 rsp->hdr.Status = STATUS_SUCCESS;
2027 rc = 0;
2028 break;
2029 case -ESTALE:
2030 case -ENOENT:
2031 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2032 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2033 break;
2034 case -ENOMEM:
2035 case KSMBD_TREE_CONN_STATUS_NOMEM:
2036 rsp->hdr.Status = STATUS_NO_MEMORY;
2037 break;
2038 case KSMBD_TREE_CONN_STATUS_ERROR:
2039 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2040 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2041 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2042 break;
2043 case -EINVAL:
2044 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2045 break;
2046 default:
2047 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2048 }
2049
2050 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2051 smb2_set_err_rsp(work);
2052
2053 return rc;
2054 }
2055
2056 /**
2057 * smb2_create_open_flags() - convert smb open flags to unix open flags
2058 * @file_present: is file already present
2059 * @access: file access flags
2060 * @disposition: file disposition flags
2061 * @may_flags: set with MAY_ flags
2062 * @is_dir: is creating open flags for directory
2063 *
2064 * Return: file open flags
2065 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags,bool is_dir)2066 static int smb2_create_open_flags(bool file_present, __le32 access,
2067 __le32 disposition,
2068 int *may_flags,
2069 bool is_dir)
2070 {
2071 int oflags = O_NONBLOCK | O_LARGEFILE;
2072
2073 if (is_dir) {
2074 access &= ~FILE_WRITE_DESIRE_ACCESS_LE;
2075 ksmbd_debug(SMB, "Discard write access to a directory\n");
2076 }
2077
2078 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2079 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2080 oflags |= O_RDWR;
2081 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2082 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2083 oflags |= O_WRONLY;
2084 *may_flags = MAY_OPEN | MAY_WRITE;
2085 } else {
2086 oflags |= O_RDONLY;
2087 *may_flags = MAY_OPEN | MAY_READ;
2088 }
2089
2090 if (access == FILE_READ_ATTRIBUTES_LE)
2091 oflags |= O_PATH;
2092
2093 if (file_present) {
2094 switch (disposition & FILE_CREATE_MASK_LE) {
2095 case FILE_OPEN_LE:
2096 case FILE_CREATE_LE:
2097 break;
2098 case FILE_SUPERSEDE_LE:
2099 case FILE_OVERWRITE_LE:
2100 case FILE_OVERWRITE_IF_LE:
2101 oflags |= O_TRUNC;
2102 break;
2103 default:
2104 break;
2105 }
2106 } else {
2107 switch (disposition & FILE_CREATE_MASK_LE) {
2108 case FILE_SUPERSEDE_LE:
2109 case FILE_CREATE_LE:
2110 case FILE_OPEN_IF_LE:
2111 case FILE_OVERWRITE_IF_LE:
2112 oflags |= O_CREAT;
2113 break;
2114 case FILE_OPEN_LE:
2115 case FILE_OVERWRITE_LE:
2116 oflags &= ~O_CREAT;
2117 break;
2118 default:
2119 break;
2120 }
2121 }
2122
2123 return oflags;
2124 }
2125
2126 /**
2127 * smb2_tree_disconnect() - handler for smb tree connect request
2128 * @work: smb work containing request buffer
2129 *
2130 * Return: 0
2131 */
smb2_tree_disconnect(struct ksmbd_work * work)2132 int smb2_tree_disconnect(struct ksmbd_work *work)
2133 {
2134 struct smb2_tree_disconnect_rsp *rsp;
2135 struct smb2_tree_disconnect_req *req;
2136 struct ksmbd_session *sess = work->sess;
2137 struct ksmbd_tree_connect *tcon = work->tcon;
2138 int err;
2139
2140 WORK_BUFFERS(work, req, rsp);
2141
2142 ksmbd_debug(SMB, "request\n");
2143
2144 if (!tcon) {
2145 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2146
2147 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2148 err = -ENOENT;
2149 goto err_out;
2150 }
2151
2152 ksmbd_close_tree_conn_fds(work);
2153
2154 write_lock(&sess->tree_conns_lock);
2155 if (tcon->t_state == TREE_DISCONNECTED) {
2156 write_unlock(&sess->tree_conns_lock);
2157 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2158 err = -ENOENT;
2159 goto err_out;
2160 }
2161
2162 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2163 tcon->t_state = TREE_DISCONNECTED;
2164 write_unlock(&sess->tree_conns_lock);
2165
2166 err = ksmbd_tree_conn_disconnect(sess, tcon);
2167 if (err) {
2168 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2169 goto err_out;
2170 }
2171
2172 work->tcon = NULL;
2173
2174 rsp->StructureSize = cpu_to_le16(4);
2175 err = ksmbd_iov_pin_rsp(work, rsp,
2176 sizeof(struct smb2_tree_disconnect_rsp));
2177 if (err) {
2178 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2179 goto err_out;
2180 }
2181
2182 return 0;
2183
2184 err_out:
2185 smb2_set_err_rsp(work);
2186 return err;
2187
2188 }
2189
2190 /**
2191 * smb2_session_logoff() - handler for session log off request
2192 * @work: smb work containing request buffer
2193 *
2194 * Return: 0
2195 */
smb2_session_logoff(struct ksmbd_work * work)2196 int smb2_session_logoff(struct ksmbd_work *work)
2197 {
2198 struct ksmbd_conn *conn = work->conn;
2199 struct smb2_logoff_req *req;
2200 struct smb2_logoff_rsp *rsp;
2201 struct ksmbd_session *sess;
2202 u64 sess_id;
2203 int err;
2204
2205 WORK_BUFFERS(work, req, rsp);
2206
2207 ksmbd_debug(SMB, "request\n");
2208
2209 ksmbd_conn_lock(conn);
2210 if (!ksmbd_conn_good(conn)) {
2211 ksmbd_conn_unlock(conn);
2212 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2213 smb2_set_err_rsp(work);
2214 return -ENOENT;
2215 }
2216 sess_id = le64_to_cpu(req->hdr.SessionId);
2217 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2218 ksmbd_conn_unlock(conn);
2219
2220 ksmbd_close_session_fds(work);
2221 ksmbd_conn_wait_idle(conn);
2222
2223 /*
2224 * Re-lookup session to validate if session is deleted
2225 * while waiting request complete
2226 */
2227 sess = ksmbd_session_lookup_all(conn, sess_id);
2228 if (ksmbd_tree_conn_session_logoff(sess)) {
2229 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2230 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2231 smb2_set_err_rsp(work);
2232 return -ENOENT;
2233 }
2234
2235 ksmbd_destroy_file_table(&sess->file_table);
2236 down_write(&conn->session_lock);
2237 sess->state = SMB2_SESSION_EXPIRED;
2238 up_write(&conn->session_lock);
2239
2240 ksmbd_free_user(sess->user);
2241 sess->user = NULL;
2242 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2243
2244 rsp->StructureSize = cpu_to_le16(4);
2245 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2246 if (err) {
2247 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2248 smb2_set_err_rsp(work);
2249 return err;
2250 }
2251 return 0;
2252 }
2253
2254 /**
2255 * create_smb2_pipe() - create IPC pipe
2256 * @work: smb work containing request buffer
2257 *
2258 * Return: 0 on success, otherwise error
2259 */
create_smb2_pipe(struct ksmbd_work * work)2260 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2261 {
2262 struct smb2_create_rsp *rsp;
2263 struct smb2_create_req *req;
2264 int id;
2265 int err;
2266 char *name;
2267
2268 WORK_BUFFERS(work, req, rsp);
2269
2270 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2271 1, work->conn->local_nls);
2272 if (IS_ERR(name)) {
2273 rsp->hdr.Status = STATUS_NO_MEMORY;
2274 err = PTR_ERR(name);
2275 goto out;
2276 }
2277
2278 id = ksmbd_session_rpc_open(work->sess, name);
2279 if (id < 0) {
2280 pr_err("Unable to open RPC pipe: %d\n", id);
2281 err = id;
2282 goto out;
2283 }
2284
2285 rsp->hdr.Status = STATUS_SUCCESS;
2286 rsp->StructureSize = cpu_to_le16(89);
2287 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2288 rsp->Flags = 0;
2289 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2290
2291 rsp->CreationTime = cpu_to_le64(0);
2292 rsp->LastAccessTime = cpu_to_le64(0);
2293 rsp->ChangeTime = cpu_to_le64(0);
2294 rsp->AllocationSize = cpu_to_le64(0);
2295 rsp->EndofFile = cpu_to_le64(0);
2296 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2297 rsp->Reserved2 = 0;
2298 rsp->VolatileFileId = id;
2299 rsp->PersistentFileId = 0;
2300 rsp->CreateContextsOffset = 0;
2301 rsp->CreateContextsLength = 0;
2302
2303 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2304 if (err)
2305 goto out;
2306
2307 kfree(name);
2308 return 0;
2309
2310 out:
2311 switch (err) {
2312 case -EINVAL:
2313 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2314 break;
2315 case -ENOSPC:
2316 case -ENOMEM:
2317 rsp->hdr.Status = STATUS_NO_MEMORY;
2318 break;
2319 }
2320
2321 if (!IS_ERR(name))
2322 kfree(name);
2323
2324 smb2_set_err_rsp(work);
2325 return err;
2326 }
2327
2328 /**
2329 * smb2_set_ea() - handler for setting extended attributes using set
2330 * info command
2331 * @eabuf: set info command buffer
2332 * @buf_len: set info command buffer length
2333 * @path: dentry path for get ea
2334 * @get_write: get write access to a mount
2335 *
2336 * Return: 0 on success, otherwise error
2337 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2338 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2339 const struct path *path, bool get_write)
2340 {
2341 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2342 char *attr_name = NULL, *value;
2343 int rc = 0;
2344 unsigned int next = 0;
2345
2346 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2347 le16_to_cpu(eabuf->EaValueLength))
2348 return -EINVAL;
2349
2350 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2351 if (!attr_name)
2352 return -ENOMEM;
2353
2354 do {
2355 if (!eabuf->EaNameLength)
2356 goto next;
2357
2358 ksmbd_debug(SMB,
2359 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2360 eabuf->name, eabuf->EaNameLength,
2361 le16_to_cpu(eabuf->EaValueLength),
2362 le32_to_cpu(eabuf->NextEntryOffset));
2363
2364 if (eabuf->EaNameLength >
2365 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2366 rc = -EINVAL;
2367 break;
2368 }
2369
2370 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2371 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2372 eabuf->EaNameLength);
2373 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2374 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2375
2376 if (!eabuf->EaValueLength) {
2377 rc = ksmbd_vfs_casexattr_len(idmap,
2378 path->dentry,
2379 attr_name,
2380 XATTR_USER_PREFIX_LEN +
2381 eabuf->EaNameLength);
2382
2383 /* delete the EA only when it exits */
2384 if (rc > 0) {
2385 rc = ksmbd_vfs_remove_xattr(idmap,
2386 path,
2387 attr_name,
2388 get_write);
2389
2390 if (rc < 0) {
2391 ksmbd_debug(SMB,
2392 "remove xattr failed(%d)\n",
2393 rc);
2394 break;
2395 }
2396 }
2397
2398 /* if the EA doesn't exist, just do nothing. */
2399 rc = 0;
2400 } else {
2401 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2402 le16_to_cpu(eabuf->EaValueLength),
2403 0, get_write);
2404 if (rc < 0) {
2405 ksmbd_debug(SMB,
2406 "ksmbd_vfs_setxattr is failed(%d)\n",
2407 rc);
2408 break;
2409 }
2410 }
2411
2412 next:
2413 next = le32_to_cpu(eabuf->NextEntryOffset);
2414 if (next == 0 || buf_len < next)
2415 break;
2416 buf_len -= next;
2417 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2418 if (buf_len < sizeof(struct smb2_ea_info)) {
2419 rc = -EINVAL;
2420 break;
2421 }
2422
2423 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2424 le16_to_cpu(eabuf->EaValueLength)) {
2425 rc = -EINVAL;
2426 break;
2427 }
2428 } while (next != 0);
2429
2430 kfree(attr_name);
2431 return rc;
2432 }
2433
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2434 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2435 struct ksmbd_file *fp,
2436 char *stream_name, int s_type)
2437 {
2438 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2439 size_t xattr_stream_size;
2440 char *xattr_stream_name;
2441 int rc;
2442
2443 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2444 &xattr_stream_name,
2445 &xattr_stream_size,
2446 s_type);
2447 if (rc)
2448 return rc;
2449
2450 fp->stream.name = xattr_stream_name;
2451 fp->stream.size = xattr_stream_size;
2452
2453 /* Check if there is stream prefix in xattr space */
2454 rc = ksmbd_vfs_casexattr_len(idmap,
2455 path->dentry,
2456 xattr_stream_name,
2457 xattr_stream_size);
2458 if (rc >= 0)
2459 return 0;
2460
2461 if (fp->cdoption == FILE_OPEN_LE) {
2462 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2463 return -EBADF;
2464 }
2465
2466 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2467 if (rc < 0)
2468 pr_err("Failed to store XATTR stream name :%d\n", rc);
2469 return 0;
2470 }
2471
smb2_remove_smb_xattrs(const struct path * path)2472 static int smb2_remove_smb_xattrs(const struct path *path)
2473 {
2474 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2475 char *name, *xattr_list = NULL;
2476 ssize_t xattr_list_len;
2477 int err = 0;
2478
2479 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2480 if (xattr_list_len < 0) {
2481 goto out;
2482 } else if (!xattr_list_len) {
2483 ksmbd_debug(SMB, "empty xattr in the file\n");
2484 goto out;
2485 }
2486
2487 for (name = xattr_list; name - xattr_list < xattr_list_len;
2488 name += strlen(name) + 1) {
2489 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2490
2491 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2492 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2493 STREAM_PREFIX_LEN)) {
2494 err = ksmbd_vfs_remove_xattr(idmap, path,
2495 name, true);
2496 if (err)
2497 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2498 name);
2499 }
2500 }
2501 out:
2502 kvfree(xattr_list);
2503 return err;
2504 }
2505
smb2_create_truncate(const struct path * path)2506 static int smb2_create_truncate(const struct path *path)
2507 {
2508 int rc = vfs_truncate(path, 0);
2509
2510 if (rc) {
2511 pr_err("vfs_truncate failed, rc %d\n", rc);
2512 return rc;
2513 }
2514
2515 rc = smb2_remove_smb_xattrs(path);
2516 if (rc == -EOPNOTSUPP)
2517 rc = 0;
2518 if (rc)
2519 ksmbd_debug(SMB,
2520 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2521 rc);
2522 return rc;
2523 }
2524
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2525 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2526 struct ksmbd_file *fp)
2527 {
2528 struct xattr_dos_attrib da = {0};
2529 int rc;
2530
2531 if (!test_share_config_flag(tcon->share_conf,
2532 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2533 return;
2534
2535 da.version = 4;
2536 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2537 da.itime = da.create_time = fp->create_time;
2538 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2539 XATTR_DOSINFO_ITIME;
2540
2541 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2542 if (rc)
2543 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2544 }
2545
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2546 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2547 const struct path *path, struct ksmbd_file *fp)
2548 {
2549 struct xattr_dos_attrib da;
2550 int rc;
2551
2552 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2553
2554 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2555 if (!test_share_config_flag(tcon->share_conf,
2556 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2557 return;
2558
2559 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2560 path->dentry, &da);
2561 if (rc > 0) {
2562 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2563 fp->create_time = da.create_time;
2564 fp->itime = da.itime;
2565 }
2566 }
2567
smb2_creat(struct ksmbd_work * work,struct path * parent_path,struct path * path,char * name,int open_flags,umode_t posix_mode,bool is_dir)2568 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2569 struct path *path, char *name, int open_flags,
2570 umode_t posix_mode, bool is_dir)
2571 {
2572 struct ksmbd_tree_connect *tcon = work->tcon;
2573 struct ksmbd_share_config *share = tcon->share_conf;
2574 umode_t mode;
2575 int rc;
2576
2577 if (!(open_flags & O_CREAT))
2578 return -EBADF;
2579
2580 ksmbd_debug(SMB, "file does not exist, so creating\n");
2581 if (is_dir == true) {
2582 ksmbd_debug(SMB, "creating directory\n");
2583
2584 mode = share_config_directory_mode(share, posix_mode);
2585 rc = ksmbd_vfs_mkdir(work, name, mode);
2586 if (rc)
2587 return rc;
2588 } else {
2589 ksmbd_debug(SMB, "creating regular file\n");
2590
2591 mode = share_config_create_mode(share, posix_mode);
2592 rc = ksmbd_vfs_create(work, name, mode);
2593 if (rc)
2594 return rc;
2595 }
2596
2597 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2598 if (rc) {
2599 pr_err("cannot get linux path (%s), err = %d\n",
2600 name, rc);
2601 return rc;
2602 }
2603 return 0;
2604 }
2605
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2606 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2607 struct smb2_create_req *req,
2608 const struct path *path)
2609 {
2610 struct create_context *context;
2611 struct create_sd_buf_req *sd_buf;
2612
2613 if (!req->CreateContextsOffset)
2614 return -ENOENT;
2615
2616 /* Parse SD BUFFER create contexts */
2617 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2618 if (!context)
2619 return -ENOENT;
2620 else if (IS_ERR(context))
2621 return PTR_ERR(context);
2622
2623 ksmbd_debug(SMB,
2624 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2625 sd_buf = (struct create_sd_buf_req *)context;
2626 if (le16_to_cpu(context->DataOffset) +
2627 le32_to_cpu(context->DataLength) <
2628 sizeof(struct create_sd_buf_req))
2629 return -EINVAL;
2630 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2631 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2632 }
2633
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2634 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2635 struct mnt_idmap *idmap,
2636 struct inode *inode)
2637 {
2638 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2639 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2640
2641 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2642 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2643 fattr->cf_mode = inode->i_mode;
2644 fattr->cf_acls = NULL;
2645 fattr->cf_dacls = NULL;
2646
2647 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2648 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2649 if (S_ISDIR(inode->i_mode))
2650 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2651 }
2652 }
2653
2654 enum {
2655 DURABLE_RECONN_V2 = 1,
2656 DURABLE_RECONN,
2657 DURABLE_REQ_V2,
2658 DURABLE_REQ,
2659 };
2660
2661 struct durable_info {
2662 struct ksmbd_file *fp;
2663 unsigned short int type;
2664 bool persistent;
2665 bool reconnected;
2666 unsigned int timeout;
2667 char *CreateGuid;
2668 };
2669
parse_durable_handle_context(struct ksmbd_work * work,struct smb2_create_req * req,struct lease_ctx_info * lc,struct durable_info * dh_info)2670 static int parse_durable_handle_context(struct ksmbd_work *work,
2671 struct smb2_create_req *req,
2672 struct lease_ctx_info *lc,
2673 struct durable_info *dh_info)
2674 {
2675 struct ksmbd_conn *conn = work->conn;
2676 struct create_context *context;
2677 int dh_idx, err = 0;
2678 u64 persistent_id = 0;
2679 int req_op_level;
2680 static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};
2681
2682 req_op_level = req->RequestedOplockLevel;
2683 for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);
2684 dh_idx++) {
2685 context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);
2686 if (IS_ERR(context)) {
2687 err = PTR_ERR(context);
2688 goto out;
2689 }
2690 if (!context)
2691 continue;
2692
2693 switch (dh_idx) {
2694 case DURABLE_RECONN_V2:
2695 {
2696 struct create_durable_reconn_v2_req *recon_v2;
2697
2698 if (dh_info->type == DURABLE_RECONN ||
2699 dh_info->type == DURABLE_REQ_V2) {
2700 err = -EINVAL;
2701 goto out;
2702 }
2703
2704 recon_v2 = (struct create_durable_reconn_v2_req *)context;
2705 persistent_id = recon_v2->Fid.PersistentFileId;
2706 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2707 if (!dh_info->fp) {
2708 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2709 err = -EBADF;
2710 goto out;
2711 }
2712
2713 if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,
2714 SMB2_CREATE_GUID_SIZE)) {
2715 err = -EBADF;
2716 ksmbd_put_durable_fd(dh_info->fp);
2717 goto out;
2718 }
2719
2720 dh_info->type = dh_idx;
2721 dh_info->reconnected = true;
2722 ksmbd_debug(SMB,
2723 "reconnect v2 Persistent-id from reconnect = %llu\n",
2724 persistent_id);
2725 break;
2726 }
2727 case DURABLE_RECONN:
2728 {
2729 struct create_durable_reconn_req *recon;
2730
2731 if (dh_info->type == DURABLE_RECONN_V2 ||
2732 dh_info->type == DURABLE_REQ_V2) {
2733 err = -EINVAL;
2734 goto out;
2735 }
2736
2737 recon = (struct create_durable_reconn_req *)context;
2738 persistent_id = recon->Data.Fid.PersistentFileId;
2739 dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);
2740 if (!dh_info->fp) {
2741 ksmbd_debug(SMB, "Failed to get durable handle state\n");
2742 err = -EBADF;
2743 goto out;
2744 }
2745
2746 dh_info->type = dh_idx;
2747 dh_info->reconnected = true;
2748 ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",
2749 persistent_id);
2750 break;
2751 }
2752 case DURABLE_REQ_V2:
2753 {
2754 struct create_durable_req_v2 *durable_v2_blob;
2755
2756 if (dh_info->type == DURABLE_RECONN ||
2757 dh_info->type == DURABLE_RECONN_V2) {
2758 err = -EINVAL;
2759 goto out;
2760 }
2761
2762 durable_v2_blob =
2763 (struct create_durable_req_v2 *)context;
2764 ksmbd_debug(SMB, "Request for durable v2 open\n");
2765 dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);
2766 if (dh_info->fp) {
2767 if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,
2768 SMB2_CLIENT_GUID_SIZE)) {
2769 if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {
2770 err = -ENOEXEC;
2771 goto out;
2772 }
2773
2774 dh_info->fp->conn = conn;
2775 dh_info->reconnected = true;
2776 goto out;
2777 }
2778 }
2779
2780 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2781 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2782 dh_info->CreateGuid =
2783 durable_v2_blob->CreateGuid;
2784 dh_info->persistent =
2785 le32_to_cpu(durable_v2_blob->Flags);
2786 dh_info->timeout =
2787 le32_to_cpu(durable_v2_blob->Timeout);
2788 dh_info->type = dh_idx;
2789 }
2790 break;
2791 }
2792 case DURABLE_REQ:
2793 if (dh_info->type == DURABLE_RECONN)
2794 goto out;
2795 if (dh_info->type == DURABLE_RECONN_V2 ||
2796 dh_info->type == DURABLE_REQ_V2) {
2797 err = -EINVAL;
2798 goto out;
2799 }
2800
2801 if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||
2802 req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {
2803 ksmbd_debug(SMB, "Request for durable open\n");
2804 dh_info->type = dh_idx;
2805 }
2806 }
2807 }
2808
2809 out:
2810 return err;
2811 }
2812
2813 /**
2814 * smb2_open() - handler for smb file open request
2815 * @work: smb work containing request buffer
2816 *
2817 * Return: 0 on success, otherwise error
2818 */
smb2_open(struct ksmbd_work * work)2819 int smb2_open(struct ksmbd_work *work)
2820 {
2821 struct ksmbd_conn *conn = work->conn;
2822 struct ksmbd_session *sess = work->sess;
2823 struct ksmbd_tree_connect *tcon = work->tcon;
2824 struct smb2_create_req *req;
2825 struct smb2_create_rsp *rsp;
2826 struct path path, parent_path;
2827 struct ksmbd_share_config *share = tcon->share_conf;
2828 struct ksmbd_file *fp = NULL;
2829 struct file *filp = NULL;
2830 struct mnt_idmap *idmap = NULL;
2831 struct kstat stat;
2832 struct create_context *context;
2833 struct lease_ctx_info *lc = NULL;
2834 struct create_ea_buf_req *ea_buf = NULL;
2835 struct oplock_info *opinfo;
2836 struct durable_info dh_info = {0};
2837 __le32 *next_ptr = NULL;
2838 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2839 int rc = 0;
2840 int contxt_cnt = 0, query_disk_id = 0;
2841 int maximal_access_ctxt = 0, posix_ctxt = 0;
2842 int s_type = 0;
2843 int next_off = 0;
2844 char *name = NULL;
2845 char *stream_name = NULL;
2846 bool file_present = false, created = false, already_permitted = false;
2847 int share_ret, need_truncate = 0;
2848 u64 time;
2849 umode_t posix_mode = 0;
2850 __le32 daccess, maximal_access = 0;
2851 int iov_len = 0;
2852
2853 WORK_BUFFERS(work, req, rsp);
2854
2855 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2856 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2857 ksmbd_debug(SMB, "invalid flag in chained command\n");
2858 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2859 smb2_set_err_rsp(work);
2860 return -EINVAL;
2861 }
2862
2863 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2864 ksmbd_debug(SMB, "IPC pipe create request\n");
2865 return create_smb2_pipe(work);
2866 }
2867
2868 if (req->NameLength) {
2869 name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),
2870 le16_to_cpu(req->NameLength),
2871 work->conn->local_nls);
2872 if (IS_ERR(name)) {
2873 rc = PTR_ERR(name);
2874 name = NULL;
2875 goto err_out2;
2876 }
2877
2878 ksmbd_debug(SMB, "converted name = %s\n", name);
2879 if (strchr(name, ':')) {
2880 if (!test_share_config_flag(work->tcon->share_conf,
2881 KSMBD_SHARE_FLAG_STREAMS)) {
2882 rc = -EBADF;
2883 goto err_out2;
2884 }
2885 rc = parse_stream_name(name, &stream_name, &s_type);
2886 if (rc < 0)
2887 goto err_out2;
2888 }
2889
2890 rc = ksmbd_validate_filename(name);
2891 if (rc < 0)
2892 goto err_out2;
2893
2894 if (ksmbd_share_veto_filename(share, name)) {
2895 rc = -ENOENT;
2896 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2897 name);
2898 goto err_out2;
2899 }
2900 } else {
2901 name = kstrdup("", GFP_KERNEL);
2902 if (!name) {
2903 rc = -ENOMEM;
2904 goto err_out2;
2905 }
2906 }
2907
2908 req_op_level = req->RequestedOplockLevel;
2909
2910 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
2911 req->CreateContextsOffset) {
2912 lc = parse_lease_state(req);
2913 rc = parse_durable_handle_context(work, req, lc, &dh_info);
2914 if (rc) {
2915 ksmbd_debug(SMB, "error parsing durable handle context\n");
2916 goto err_out2;
2917 }
2918
2919 if (dh_info.reconnected == true) {
2920 rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);
2921 if (rc) {
2922 ksmbd_put_durable_fd(dh_info.fp);
2923 goto err_out2;
2924 }
2925
2926 rc = ksmbd_reopen_durable_fd(work, dh_info.fp);
2927 if (rc) {
2928 ksmbd_put_durable_fd(dh_info.fp);
2929 goto err_out2;
2930 }
2931
2932 if (ksmbd_override_fsids(work)) {
2933 rc = -ENOMEM;
2934 ksmbd_put_durable_fd(dh_info.fp);
2935 goto err_out2;
2936 }
2937
2938 fp = dh_info.fp;
2939 file_info = FILE_OPENED;
2940
2941 rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);
2942 if (rc)
2943 goto err_out2;
2944
2945 ksmbd_put_durable_fd(fp);
2946 goto reconnected_fp;
2947 }
2948 } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2949 lc = parse_lease_state(req);
2950
2951 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2952 pr_err("Invalid impersonationlevel : 0x%x\n",
2953 le32_to_cpu(req->ImpersonationLevel));
2954 rc = -EIO;
2955 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2956 goto err_out2;
2957 }
2958
2959 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2960 pr_err("Invalid create options : 0x%x\n",
2961 le32_to_cpu(req->CreateOptions));
2962 rc = -EINVAL;
2963 goto err_out2;
2964 } else {
2965 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2966 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2967 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2968
2969 if (req->CreateOptions &
2970 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2971 FILE_RESERVE_OPFILTER_LE)) {
2972 rc = -EOPNOTSUPP;
2973 goto err_out2;
2974 }
2975
2976 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2977 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2978 rc = -EINVAL;
2979 goto err_out2;
2980 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2981 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2982 }
2983 }
2984 }
2985
2986 if (le32_to_cpu(req->CreateDisposition) >
2987 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2988 pr_err("Invalid create disposition : 0x%x\n",
2989 le32_to_cpu(req->CreateDisposition));
2990 rc = -EINVAL;
2991 goto err_out2;
2992 }
2993
2994 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2995 pr_err("Invalid desired access : 0x%x\n",
2996 le32_to_cpu(req->DesiredAccess));
2997 rc = -EACCES;
2998 goto err_out2;
2999 }
3000
3001 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
3002 pr_err("Invalid file attribute : 0x%x\n",
3003 le32_to_cpu(req->FileAttributes));
3004 rc = -EINVAL;
3005 goto err_out2;
3006 }
3007
3008 if (req->CreateContextsOffset) {
3009 /* Parse non-durable handle create contexts */
3010 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
3011 if (IS_ERR(context)) {
3012 rc = PTR_ERR(context);
3013 goto err_out2;
3014 } else if (context) {
3015 ea_buf = (struct create_ea_buf_req *)context;
3016 if (le16_to_cpu(context->DataOffset) +
3017 le32_to_cpu(context->DataLength) <
3018 sizeof(struct create_ea_buf_req)) {
3019 rc = -EINVAL;
3020 goto err_out2;
3021 }
3022 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
3023 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3024 rc = -EACCES;
3025 goto err_out2;
3026 }
3027 }
3028
3029 context = smb2_find_context_vals(req,
3030 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
3031 if (IS_ERR(context)) {
3032 rc = PTR_ERR(context);
3033 goto err_out2;
3034 } else if (context) {
3035 ksmbd_debug(SMB,
3036 "get query maximal access context\n");
3037 maximal_access_ctxt = 1;
3038 }
3039
3040 context = smb2_find_context_vals(req,
3041 SMB2_CREATE_TIMEWARP_REQUEST, 4);
3042 if (IS_ERR(context)) {
3043 rc = PTR_ERR(context);
3044 goto err_out2;
3045 } else if (context) {
3046 ksmbd_debug(SMB, "get timewarp context\n");
3047 rc = -EBADF;
3048 goto err_out2;
3049 }
3050
3051 if (tcon->posix_extensions) {
3052 context = smb2_find_context_vals(req,
3053 SMB2_CREATE_TAG_POSIX, 16);
3054 if (IS_ERR(context)) {
3055 rc = PTR_ERR(context);
3056 goto err_out2;
3057 } else if (context) {
3058 struct create_posix *posix =
3059 (struct create_posix *)context;
3060 if (le16_to_cpu(context->DataOffset) +
3061 le32_to_cpu(context->DataLength) <
3062 sizeof(struct create_posix) - 4) {
3063 rc = -EINVAL;
3064 goto err_out2;
3065 }
3066 ksmbd_debug(SMB, "get posix context\n");
3067
3068 posix_mode = le32_to_cpu(posix->Mode);
3069 posix_ctxt = 1;
3070 }
3071 }
3072 }
3073
3074 if (ksmbd_override_fsids(work)) {
3075 rc = -ENOMEM;
3076 goto err_out2;
3077 }
3078
3079 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
3080 &parent_path, &path, 1);
3081 if (!rc) {
3082 file_present = true;
3083
3084 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
3085 /*
3086 * If file exists with under flags, return access
3087 * denied error.
3088 */
3089 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
3090 req->CreateDisposition == FILE_OPEN_IF_LE) {
3091 rc = -EACCES;
3092 goto err_out;
3093 }
3094
3095 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3096 ksmbd_debug(SMB,
3097 "User does not have write permission\n");
3098 rc = -EACCES;
3099 goto err_out;
3100 }
3101 } else if (d_is_symlink(path.dentry)) {
3102 rc = -EACCES;
3103 goto err_out;
3104 }
3105
3106 file_present = true;
3107 idmap = mnt_idmap(path.mnt);
3108 } else {
3109 if (rc != -ENOENT)
3110 goto err_out;
3111 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
3112 name, rc);
3113 rc = 0;
3114 }
3115
3116 if (stream_name) {
3117 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
3118 if (s_type == DATA_STREAM) {
3119 rc = -EIO;
3120 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3121 }
3122 } else {
3123 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
3124 s_type == DATA_STREAM) {
3125 rc = -EIO;
3126 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3127 }
3128 }
3129
3130 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
3131 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
3132 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3133 rc = -EIO;
3134 }
3135
3136 if (rc < 0)
3137 goto err_out;
3138 }
3139
3140 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
3141 S_ISDIR(d_inode(path.dentry)->i_mode) &&
3142 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3143 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
3144 name, req->CreateOptions);
3145 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
3146 rc = -EIO;
3147 goto err_out;
3148 }
3149
3150 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
3151 !(req->CreateDisposition == FILE_CREATE_LE) &&
3152 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
3153 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
3154 rc = -EIO;
3155 goto err_out;
3156 }
3157
3158 if (!stream_name && file_present &&
3159 req->CreateDisposition == FILE_CREATE_LE) {
3160 rc = -EEXIST;
3161 goto err_out;
3162 }
3163
3164 daccess = smb_map_generic_desired_access(req->DesiredAccess);
3165
3166 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3167 rc = smb_check_perm_dacl(conn, &path, &daccess,
3168 sess->user->uid);
3169 if (rc)
3170 goto err_out;
3171 }
3172
3173 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
3174 if (!file_present) {
3175 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
3176 } else {
3177 ksmbd_vfs_query_maximal_access(idmap,
3178 path.dentry,
3179 &daccess);
3180 already_permitted = true;
3181 }
3182 maximal_access = daccess;
3183 }
3184
3185 open_flags = smb2_create_open_flags(file_present, daccess,
3186 req->CreateDisposition,
3187 &may_flags,
3188 req->CreateOptions & FILE_DIRECTORY_FILE_LE ||
3189 (file_present && S_ISDIR(d_inode(path.dentry)->i_mode)));
3190
3191 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
3192 if (open_flags & (O_CREAT | O_TRUNC)) {
3193 ksmbd_debug(SMB,
3194 "User does not have write permission\n");
3195 rc = -EACCES;
3196 goto err_out;
3197 }
3198 }
3199
3200 /*create file if not present */
3201 if (!file_present) {
3202 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
3203 posix_mode,
3204 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3205 if (rc) {
3206 if (rc == -ENOENT) {
3207 rc = -EIO;
3208 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3209 }
3210 goto err_out;
3211 }
3212
3213 created = true;
3214 idmap = mnt_idmap(path.mnt);
3215 if (ea_buf) {
3216 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3217 sizeof(struct smb2_ea_info)) {
3218 rc = -EINVAL;
3219 goto err_out;
3220 }
3221
3222 rc = smb2_set_ea(&ea_buf->ea,
3223 le32_to_cpu(ea_buf->ccontext.DataLength),
3224 &path, false);
3225 if (rc == -EOPNOTSUPP)
3226 rc = 0;
3227 else if (rc)
3228 goto err_out;
3229 }
3230 } else if (!already_permitted) {
3231 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3232 * because execute(search) permission on a parent directory,
3233 * is already granted.
3234 */
3235 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3236 rc = inode_permission(idmap,
3237 d_inode(path.dentry),
3238 may_flags);
3239 if (rc)
3240 goto err_out;
3241
3242 if ((daccess & FILE_DELETE_LE) ||
3243 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3244 rc = inode_permission(idmap,
3245 d_inode(path.dentry->d_parent),
3246 MAY_EXEC | MAY_WRITE);
3247 if (rc)
3248 goto err_out;
3249 }
3250 }
3251 }
3252
3253 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3254 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3255 rc = -EBUSY;
3256 goto err_out;
3257 }
3258
3259 rc = 0;
3260 filp = dentry_open(&path, open_flags, current_cred());
3261 if (IS_ERR(filp)) {
3262 rc = PTR_ERR(filp);
3263 pr_err("dentry open for dir failed, rc %d\n", rc);
3264 goto err_out;
3265 }
3266
3267 if (file_present) {
3268 if (!(open_flags & O_TRUNC))
3269 file_info = FILE_OPENED;
3270 else
3271 file_info = FILE_OVERWRITTEN;
3272
3273 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3274 FILE_SUPERSEDE_LE)
3275 file_info = FILE_SUPERSEDED;
3276 } else if (open_flags & O_CREAT) {
3277 file_info = FILE_CREATED;
3278 }
3279
3280 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3281
3282 /* Obtain Volatile-ID */
3283 fp = ksmbd_open_fd(work, filp);
3284 if (IS_ERR(fp)) {
3285 fput(filp);
3286 rc = PTR_ERR(fp);
3287 fp = NULL;
3288 goto err_out;
3289 }
3290
3291 /* Get Persistent-ID */
3292 ksmbd_open_durable_fd(fp);
3293 if (!has_file_id(fp->persistent_id)) {
3294 rc = -ENOMEM;
3295 goto err_out;
3296 }
3297
3298 fp->cdoption = req->CreateDisposition;
3299 fp->daccess = daccess;
3300 fp->saccess = req->ShareAccess;
3301 fp->coption = req->CreateOptions;
3302
3303 /* Set default windows and posix acls if creating new file */
3304 if (created) {
3305 int posix_acl_rc;
3306 struct inode *inode = d_inode(path.dentry);
3307
3308 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3309 &path,
3310 d_inode(path.dentry->d_parent));
3311 if (posix_acl_rc)
3312 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3313
3314 if (test_share_config_flag(work->tcon->share_conf,
3315 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3316 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3317 sess->user->gid);
3318 }
3319
3320 if (rc) {
3321 rc = smb2_create_sd_buffer(work, req, &path);
3322 if (rc) {
3323 if (posix_acl_rc)
3324 ksmbd_vfs_set_init_posix_acl(idmap,
3325 &path);
3326
3327 if (test_share_config_flag(work->tcon->share_conf,
3328 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3329 struct smb_fattr fattr;
3330 struct smb_ntsd *pntsd;
3331 int pntsd_size, ace_num = 0;
3332
3333 ksmbd_acls_fattr(&fattr, idmap, inode);
3334 if (fattr.cf_acls)
3335 ace_num = fattr.cf_acls->a_count;
3336 if (fattr.cf_dacls)
3337 ace_num += fattr.cf_dacls->a_count;
3338
3339 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3340 sizeof(struct smb_sid) * 3 +
3341 sizeof(struct smb_acl) +
3342 sizeof(struct smb_ace) * ace_num * 2,
3343 GFP_KERNEL);
3344 if (!pntsd) {
3345 posix_acl_release(fattr.cf_acls);
3346 posix_acl_release(fattr.cf_dacls);
3347 goto err_out;
3348 }
3349
3350 rc = build_sec_desc(idmap,
3351 pntsd, NULL, 0,
3352 OWNER_SECINFO |
3353 GROUP_SECINFO |
3354 DACL_SECINFO,
3355 &pntsd_size, &fattr);
3356 posix_acl_release(fattr.cf_acls);
3357 posix_acl_release(fattr.cf_dacls);
3358 if (rc) {
3359 kfree(pntsd);
3360 goto err_out;
3361 }
3362
3363 rc = ksmbd_vfs_set_sd_xattr(conn,
3364 idmap,
3365 &path,
3366 pntsd,
3367 pntsd_size,
3368 false);
3369 kfree(pntsd);
3370 if (rc)
3371 pr_err("failed to store ntacl in xattr : %d\n",
3372 rc);
3373 }
3374 }
3375 }
3376 rc = 0;
3377 }
3378
3379 if (stream_name) {
3380 rc = smb2_set_stream_name_xattr(&path,
3381 fp,
3382 stream_name,
3383 s_type);
3384 if (rc)
3385 goto err_out;
3386 file_info = FILE_CREATED;
3387 }
3388
3389 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3390 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3391
3392 /* fp should be searchable through ksmbd_inode.m_fp_list
3393 * after daccess, saccess, attrib_only, and stream are
3394 * initialized.
3395 */
3396 down_write(&fp->f_ci->m_lock);
3397 list_add(&fp->node, &fp->f_ci->m_fp_list);
3398 up_write(&fp->f_ci->m_lock);
3399
3400 /* Check delete pending among previous fp before oplock break */
3401 if (ksmbd_inode_pending_delete(fp)) {
3402 rc = -EBUSY;
3403 goto err_out;
3404 }
3405
3406 if (file_present || created)
3407 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3408
3409 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3410 !fp->attrib_only && !stream_name) {
3411 smb_break_all_oplock(work, fp);
3412 need_truncate = 1;
3413 }
3414
3415 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3416 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3417 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3418 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3419 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3420 rc = share_ret;
3421 goto err_out1;
3422 }
3423 } else {
3424 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {
3425 if (S_ISDIR(file_inode(filp)->i_mode)) {
3426 lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;
3427 lc->is_dir = true;
3428 }
3429
3430 /*
3431 * Compare parent lease using parent key. If there is no
3432 * a lease that has same parent key, Send lease break
3433 * notification.
3434 */
3435 smb_send_parent_lease_break_noti(fp, lc);
3436
3437 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3438 ksmbd_debug(SMB,
3439 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3440 name, req_op_level, lc->req_state);
3441 rc = find_same_lease_key(sess, fp->f_ci, lc);
3442 if (rc)
3443 goto err_out1;
3444 } else if (open_flags == O_RDONLY &&
3445 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3446 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3447 req_op_level = SMB2_OPLOCK_LEVEL_II;
3448
3449 rc = smb_grant_oplock(work, req_op_level,
3450 fp->persistent_id, fp,
3451 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3452 lc, share_ret);
3453 if (rc < 0)
3454 goto err_out1;
3455 }
3456
3457 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3458 ksmbd_fd_set_delete_on_close(fp, file_info);
3459
3460 if (need_truncate) {
3461 rc = smb2_create_truncate(&fp->filp->f_path);
3462 if (rc)
3463 goto err_out1;
3464 }
3465
3466 if (req->CreateContextsOffset) {
3467 struct create_alloc_size_req *az_req;
3468
3469 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3470 SMB2_CREATE_ALLOCATION_SIZE, 4);
3471 if (IS_ERR(az_req)) {
3472 rc = PTR_ERR(az_req);
3473 goto err_out1;
3474 } else if (az_req) {
3475 loff_t alloc_size;
3476 int err;
3477
3478 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3479 le32_to_cpu(az_req->ccontext.DataLength) <
3480 sizeof(struct create_alloc_size_req)) {
3481 rc = -EINVAL;
3482 goto err_out1;
3483 }
3484 alloc_size = le64_to_cpu(az_req->AllocationSize);
3485 ksmbd_debug(SMB,
3486 "request smb2 create allocate size : %llu\n",
3487 alloc_size);
3488 smb_break_all_levII_oplock(work, fp, 1);
3489 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3490 alloc_size);
3491 if (err < 0)
3492 ksmbd_debug(SMB,
3493 "vfs_fallocate is failed : %d\n",
3494 err);
3495 }
3496
3497 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3498 if (IS_ERR(context)) {
3499 rc = PTR_ERR(context);
3500 goto err_out1;
3501 } else if (context) {
3502 ksmbd_debug(SMB, "get query on disk id context\n");
3503 query_disk_id = 1;
3504 }
3505 }
3506
3507 rc = ksmbd_vfs_getattr(&path, &stat);
3508 if (rc)
3509 goto err_out1;
3510
3511 if (stat.result_mask & STATX_BTIME)
3512 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3513 else
3514 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3515 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3516 fp->f_ci->m_fattr =
3517 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3518
3519 if (!created)
3520 smb2_update_xattrs(tcon, &path, fp);
3521 else
3522 smb2_new_xattrs(tcon, &path, fp);
3523
3524 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3525
3526 if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
3527 if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
3528 test_share_config_flag(work->tcon->share_conf,
3529 KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
3530 fp->is_persistent = true;
3531 else
3532 fp->is_durable = true;
3533
3534 if (dh_info.type == DURABLE_REQ_V2) {
3535 memcpy(fp->create_guid, dh_info.CreateGuid,
3536 SMB2_CREATE_GUID_SIZE);
3537 if (dh_info.timeout)
3538 fp->durable_timeout = min(dh_info.timeout,
3539 300000);
3540 else
3541 fp->durable_timeout = 60;
3542 }
3543 }
3544
3545 reconnected_fp:
3546 rsp->StructureSize = cpu_to_le16(89);
3547 rcu_read_lock();
3548 opinfo = rcu_dereference(fp->f_opinfo);
3549 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3550 rcu_read_unlock();
3551 rsp->Flags = 0;
3552 rsp->CreateAction = cpu_to_le32(file_info);
3553 rsp->CreationTime = cpu_to_le64(fp->create_time);
3554 time = ksmbd_UnixTimeToNT(stat.atime);
3555 rsp->LastAccessTime = cpu_to_le64(time);
3556 time = ksmbd_UnixTimeToNT(stat.mtime);
3557 rsp->LastWriteTime = cpu_to_le64(time);
3558 time = ksmbd_UnixTimeToNT(stat.ctime);
3559 rsp->ChangeTime = cpu_to_le64(time);
3560 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3561 cpu_to_le64(stat.blocks << 9);
3562 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3563 rsp->FileAttributes = fp->f_ci->m_fattr;
3564
3565 rsp->Reserved2 = 0;
3566
3567 rsp->PersistentFileId = fp->persistent_id;
3568 rsp->VolatileFileId = fp->volatile_id;
3569
3570 rsp->CreateContextsOffset = 0;
3571 rsp->CreateContextsLength = 0;
3572 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3573
3574 /* If lease is request send lease context response */
3575 if (opinfo && opinfo->is_lease) {
3576 struct create_context *lease_ccontext;
3577
3578 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3579 name, opinfo->o_lease->state);
3580 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3581
3582 lease_ccontext = (struct create_context *)rsp->Buffer;
3583 contxt_cnt++;
3584 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3585 le32_add_cpu(&rsp->CreateContextsLength,
3586 conn->vals->create_lease_size);
3587 iov_len += conn->vals->create_lease_size;
3588 next_ptr = &lease_ccontext->Next;
3589 next_off = conn->vals->create_lease_size;
3590 }
3591
3592 if (maximal_access_ctxt) {
3593 struct create_context *mxac_ccontext;
3594
3595 if (maximal_access == 0)
3596 ksmbd_vfs_query_maximal_access(idmap,
3597 path.dentry,
3598 &maximal_access);
3599 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3600 le32_to_cpu(rsp->CreateContextsLength));
3601 contxt_cnt++;
3602 create_mxac_rsp_buf(rsp->Buffer +
3603 le32_to_cpu(rsp->CreateContextsLength),
3604 le32_to_cpu(maximal_access));
3605 le32_add_cpu(&rsp->CreateContextsLength,
3606 conn->vals->create_mxac_size);
3607 iov_len += conn->vals->create_mxac_size;
3608 if (next_ptr)
3609 *next_ptr = cpu_to_le32(next_off);
3610 next_ptr = &mxac_ccontext->Next;
3611 next_off = conn->vals->create_mxac_size;
3612 }
3613
3614 if (query_disk_id) {
3615 struct create_context *disk_id_ccontext;
3616
3617 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3618 le32_to_cpu(rsp->CreateContextsLength));
3619 contxt_cnt++;
3620 create_disk_id_rsp_buf(rsp->Buffer +
3621 le32_to_cpu(rsp->CreateContextsLength),
3622 stat.ino, tcon->id);
3623 le32_add_cpu(&rsp->CreateContextsLength,
3624 conn->vals->create_disk_id_size);
3625 iov_len += conn->vals->create_disk_id_size;
3626 if (next_ptr)
3627 *next_ptr = cpu_to_le32(next_off);
3628 next_ptr = &disk_id_ccontext->Next;
3629 next_off = conn->vals->create_disk_id_size;
3630 }
3631
3632 if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {
3633 struct create_context *durable_ccontext;
3634
3635 durable_ccontext = (struct create_context *)(rsp->Buffer +
3636 le32_to_cpu(rsp->CreateContextsLength));
3637 contxt_cnt++;
3638 if (dh_info.type == DURABLE_REQ) {
3639 create_durable_rsp_buf(rsp->Buffer +
3640 le32_to_cpu(rsp->CreateContextsLength));
3641 le32_add_cpu(&rsp->CreateContextsLength,
3642 conn->vals->create_durable_size);
3643 iov_len += conn->vals->create_durable_size;
3644 } else {
3645 create_durable_v2_rsp_buf(rsp->Buffer +
3646 le32_to_cpu(rsp->CreateContextsLength),
3647 fp);
3648 le32_add_cpu(&rsp->CreateContextsLength,
3649 conn->vals->create_durable_v2_size);
3650 iov_len += conn->vals->create_durable_v2_size;
3651 }
3652
3653 if (next_ptr)
3654 *next_ptr = cpu_to_le32(next_off);
3655 next_ptr = &durable_ccontext->Next;
3656 next_off = conn->vals->create_durable_size;
3657 }
3658
3659 if (posix_ctxt) {
3660 contxt_cnt++;
3661 create_posix_rsp_buf(rsp->Buffer +
3662 le32_to_cpu(rsp->CreateContextsLength),
3663 fp);
3664 le32_add_cpu(&rsp->CreateContextsLength,
3665 conn->vals->create_posix_size);
3666 iov_len += conn->vals->create_posix_size;
3667 if (next_ptr)
3668 *next_ptr = cpu_to_le32(next_off);
3669 }
3670
3671 if (contxt_cnt > 0) {
3672 rsp->CreateContextsOffset =
3673 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3674 }
3675
3676 err_out:
3677 if (rc && (file_present || created))
3678 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3679
3680 err_out1:
3681 ksmbd_revert_fsids(work);
3682
3683 err_out2:
3684 if (!rc) {
3685 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3686 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3687 }
3688 if (rc) {
3689 if (rc == -EINVAL)
3690 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3691 else if (rc == -EOPNOTSUPP)
3692 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3693 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3694 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3695 else if (rc == -ENOENT)
3696 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3697 else if (rc == -EPERM)
3698 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3699 else if (rc == -EBUSY)
3700 rsp->hdr.Status = STATUS_DELETE_PENDING;
3701 else if (rc == -EBADF)
3702 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3703 else if (rc == -ENOEXEC)
3704 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3705 else if (rc == -ENXIO)
3706 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3707 else if (rc == -EEXIST)
3708 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3709 else if (rc == -EMFILE)
3710 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3711 if (!rsp->hdr.Status)
3712 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3713
3714 if (fp)
3715 ksmbd_fd_put(work, fp);
3716 smb2_set_err_rsp(work);
3717 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3718 }
3719
3720 kfree(name);
3721 kfree(lc);
3722
3723 return rc;
3724 }
3725
readdir_info_level_struct_sz(int info_level)3726 static int readdir_info_level_struct_sz(int info_level)
3727 {
3728 switch (info_level) {
3729 case FILE_FULL_DIRECTORY_INFORMATION:
3730 return sizeof(struct file_full_directory_info);
3731 case FILE_BOTH_DIRECTORY_INFORMATION:
3732 return sizeof(struct file_both_directory_info);
3733 case FILE_DIRECTORY_INFORMATION:
3734 return sizeof(struct file_directory_info);
3735 case FILE_NAMES_INFORMATION:
3736 return sizeof(struct file_names_info);
3737 case FILEID_FULL_DIRECTORY_INFORMATION:
3738 return sizeof(struct file_id_full_dir_info);
3739 case FILEID_BOTH_DIRECTORY_INFORMATION:
3740 return sizeof(struct file_id_both_directory_info);
3741 case SMB_FIND_FILE_POSIX_INFO:
3742 return sizeof(struct smb2_posix_info);
3743 default:
3744 return -EOPNOTSUPP;
3745 }
3746 }
3747
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3748 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3749 {
3750 switch (info_level) {
3751 case FILE_FULL_DIRECTORY_INFORMATION:
3752 {
3753 struct file_full_directory_info *ffdinfo;
3754
3755 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3756 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3757 d_info->name = ffdinfo->FileName;
3758 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3759 return 0;
3760 }
3761 case FILE_BOTH_DIRECTORY_INFORMATION:
3762 {
3763 struct file_both_directory_info *fbdinfo;
3764
3765 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3766 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3767 d_info->name = fbdinfo->FileName;
3768 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3769 return 0;
3770 }
3771 case FILE_DIRECTORY_INFORMATION:
3772 {
3773 struct file_directory_info *fdinfo;
3774
3775 fdinfo = (struct file_directory_info *)d_info->rptr;
3776 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3777 d_info->name = fdinfo->FileName;
3778 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3779 return 0;
3780 }
3781 case FILE_NAMES_INFORMATION:
3782 {
3783 struct file_names_info *fninfo;
3784
3785 fninfo = (struct file_names_info *)d_info->rptr;
3786 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3787 d_info->name = fninfo->FileName;
3788 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3789 return 0;
3790 }
3791 case FILEID_FULL_DIRECTORY_INFORMATION:
3792 {
3793 struct file_id_full_dir_info *dinfo;
3794
3795 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3796 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3797 d_info->name = dinfo->FileName;
3798 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3799 return 0;
3800 }
3801 case FILEID_BOTH_DIRECTORY_INFORMATION:
3802 {
3803 struct file_id_both_directory_info *fibdinfo;
3804
3805 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3806 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3807 d_info->name = fibdinfo->FileName;
3808 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3809 return 0;
3810 }
3811 case SMB_FIND_FILE_POSIX_INFO:
3812 {
3813 struct smb2_posix_info *posix_info;
3814
3815 posix_info = (struct smb2_posix_info *)d_info->rptr;
3816 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3817 d_info->name = posix_info->name;
3818 d_info->name_len = le32_to_cpu(posix_info->name_len);
3819 return 0;
3820 }
3821 default:
3822 return -EINVAL;
3823 }
3824 }
3825
3826 /**
3827 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3828 * buffer
3829 * @conn: connection instance
3830 * @info_level: smb information level
3831 * @d_info: structure included variables for query dir
3832 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3833 *
3834 * if directory has many entries, find first can't read it fully.
3835 * find next might be called multiple times to read remaining dir entries
3836 *
3837 * Return: 0 on success, otherwise error
3838 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3839 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3840 struct ksmbd_dir_info *d_info,
3841 struct ksmbd_kstat *ksmbd_kstat)
3842 {
3843 int next_entry_offset = 0;
3844 char *conv_name;
3845 int conv_len;
3846 void *kstat;
3847 int struct_sz, rc = 0;
3848
3849 conv_name = ksmbd_convert_dir_info_name(d_info,
3850 conn->local_nls,
3851 &conv_len);
3852 if (!conv_name)
3853 return -ENOMEM;
3854
3855 /* Somehow the name has only terminating NULL bytes */
3856 if (conv_len < 0) {
3857 rc = -EINVAL;
3858 goto free_conv_name;
3859 }
3860
3861 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3862 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3863 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3864
3865 if (next_entry_offset > d_info->out_buf_len) {
3866 d_info->out_buf_len = 0;
3867 rc = -ENOSPC;
3868 goto free_conv_name;
3869 }
3870
3871 kstat = d_info->wptr;
3872 if (info_level != FILE_NAMES_INFORMATION)
3873 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3874
3875 switch (info_level) {
3876 case FILE_FULL_DIRECTORY_INFORMATION:
3877 {
3878 struct file_full_directory_info *ffdinfo;
3879
3880 ffdinfo = (struct file_full_directory_info *)kstat;
3881 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3882 ffdinfo->EaSize =
3883 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3884 if (ffdinfo->EaSize)
3885 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3886 if (d_info->hide_dot_file && d_info->name[0] == '.')
3887 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3888 memcpy(ffdinfo->FileName, conv_name, conv_len);
3889 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3890 break;
3891 }
3892 case FILE_BOTH_DIRECTORY_INFORMATION:
3893 {
3894 struct file_both_directory_info *fbdinfo;
3895
3896 fbdinfo = (struct file_both_directory_info *)kstat;
3897 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3898 fbdinfo->EaSize =
3899 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3900 if (fbdinfo->EaSize)
3901 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3902 fbdinfo->ShortNameLength = 0;
3903 fbdinfo->Reserved = 0;
3904 if (d_info->hide_dot_file && d_info->name[0] == '.')
3905 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3906 memcpy(fbdinfo->FileName, conv_name, conv_len);
3907 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3908 break;
3909 }
3910 case FILE_DIRECTORY_INFORMATION:
3911 {
3912 struct file_directory_info *fdinfo;
3913
3914 fdinfo = (struct file_directory_info *)kstat;
3915 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3916 if (d_info->hide_dot_file && d_info->name[0] == '.')
3917 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3918 memcpy(fdinfo->FileName, conv_name, conv_len);
3919 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3920 break;
3921 }
3922 case FILE_NAMES_INFORMATION:
3923 {
3924 struct file_names_info *fninfo;
3925
3926 fninfo = (struct file_names_info *)kstat;
3927 fninfo->FileNameLength = cpu_to_le32(conv_len);
3928 memcpy(fninfo->FileName, conv_name, conv_len);
3929 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3930 break;
3931 }
3932 case FILEID_FULL_DIRECTORY_INFORMATION:
3933 {
3934 struct file_id_full_dir_info *dinfo;
3935
3936 dinfo = (struct file_id_full_dir_info *)kstat;
3937 dinfo->FileNameLength = cpu_to_le32(conv_len);
3938 dinfo->EaSize =
3939 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3940 if (dinfo->EaSize)
3941 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3942 dinfo->Reserved = 0;
3943 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3944 if (d_info->hide_dot_file && d_info->name[0] == '.')
3945 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3946 memcpy(dinfo->FileName, conv_name, conv_len);
3947 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3948 break;
3949 }
3950 case FILEID_BOTH_DIRECTORY_INFORMATION:
3951 {
3952 struct file_id_both_directory_info *fibdinfo;
3953
3954 fibdinfo = (struct file_id_both_directory_info *)kstat;
3955 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3956 fibdinfo->EaSize =
3957 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3958 if (fibdinfo->EaSize)
3959 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3960 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3961 fibdinfo->ShortNameLength = 0;
3962 fibdinfo->Reserved = 0;
3963 fibdinfo->Reserved2 = cpu_to_le16(0);
3964 if (d_info->hide_dot_file && d_info->name[0] == '.')
3965 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3966 memcpy(fibdinfo->FileName, conv_name, conv_len);
3967 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3968 break;
3969 }
3970 case SMB_FIND_FILE_POSIX_INFO:
3971 {
3972 struct smb2_posix_info *posix_info;
3973 u64 time;
3974
3975 posix_info = (struct smb2_posix_info *)kstat;
3976 posix_info->Ignored = 0;
3977 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3978 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3979 posix_info->ChangeTime = cpu_to_le64(time);
3980 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3981 posix_info->LastAccessTime = cpu_to_le64(time);
3982 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3983 posix_info->LastWriteTime = cpu_to_le64(time);
3984 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3985 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3986 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3987 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3988 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3989 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3990 posix_info->DosAttributes =
3991 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3992 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3993 if (d_info->hide_dot_file && d_info->name[0] == '.')
3994 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3995 /*
3996 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3997 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3998 * sub_auth(4 * 1(num_subauth)) + RID(4).
3999 */
4000 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
4001 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
4002 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
4003 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
4004 memcpy(posix_info->name, conv_name, conv_len);
4005 posix_info->name_len = cpu_to_le32(conv_len);
4006 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
4007 break;
4008 }
4009
4010 } /* switch (info_level) */
4011
4012 d_info->last_entry_offset = d_info->data_count;
4013 d_info->data_count += next_entry_offset;
4014 d_info->out_buf_len -= next_entry_offset;
4015 d_info->wptr += next_entry_offset;
4016
4017 ksmbd_debug(SMB,
4018 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
4019 info_level, d_info->out_buf_len,
4020 next_entry_offset, d_info->data_count);
4021
4022 free_conv_name:
4023 kfree(conv_name);
4024 return rc;
4025 }
4026
4027 struct smb2_query_dir_private {
4028 struct ksmbd_work *work;
4029 char *search_pattern;
4030 struct ksmbd_file *dir_fp;
4031
4032 struct ksmbd_dir_info *d_info;
4033 int info_level;
4034 };
4035
lock_dir(struct ksmbd_file * dir_fp)4036 static void lock_dir(struct ksmbd_file *dir_fp)
4037 {
4038 struct dentry *dir = dir_fp->filp->f_path.dentry;
4039
4040 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
4041 }
4042
unlock_dir(struct ksmbd_file * dir_fp)4043 static void unlock_dir(struct ksmbd_file *dir_fp)
4044 {
4045 struct dentry *dir = dir_fp->filp->f_path.dentry;
4046
4047 inode_unlock(d_inode(dir));
4048 }
4049
process_query_dir_entries(struct smb2_query_dir_private * priv)4050 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
4051 {
4052 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
4053 struct kstat kstat;
4054 struct ksmbd_kstat ksmbd_kstat;
4055 int rc;
4056 int i;
4057
4058 for (i = 0; i < priv->d_info->num_entry; i++) {
4059 struct dentry *dent;
4060
4061 if (dentry_name(priv->d_info, priv->info_level))
4062 return -EINVAL;
4063
4064 lock_dir(priv->dir_fp);
4065 dent = lookup_one(idmap, priv->d_info->name,
4066 priv->dir_fp->filp->f_path.dentry,
4067 priv->d_info->name_len);
4068 unlock_dir(priv->dir_fp);
4069
4070 if (IS_ERR(dent)) {
4071 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
4072 priv->d_info->name,
4073 PTR_ERR(dent));
4074 continue;
4075 }
4076 if (unlikely(d_is_negative(dent))) {
4077 dput(dent);
4078 ksmbd_debug(SMB, "Negative dentry `%s'\n",
4079 priv->d_info->name);
4080 continue;
4081 }
4082
4083 ksmbd_kstat.kstat = &kstat;
4084 if (priv->info_level != FILE_NAMES_INFORMATION) {
4085 rc = ksmbd_vfs_fill_dentry_attrs(priv->work,
4086 idmap,
4087 dent,
4088 &ksmbd_kstat);
4089 if (rc) {
4090 dput(dent);
4091 continue;
4092 }
4093 }
4094
4095 rc = smb2_populate_readdir_entry(priv->work->conn,
4096 priv->info_level,
4097 priv->d_info,
4098 &ksmbd_kstat);
4099 dput(dent);
4100 if (rc)
4101 return rc;
4102 }
4103 return 0;
4104 }
4105
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)4106 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
4107 int info_level)
4108 {
4109 int struct_sz;
4110 int conv_len;
4111 int next_entry_offset;
4112
4113 struct_sz = readdir_info_level_struct_sz(info_level);
4114 if (struct_sz == -EOPNOTSUPP)
4115 return -EOPNOTSUPP;
4116
4117 conv_len = (d_info->name_len + 1) * 2;
4118 next_entry_offset = ALIGN(struct_sz + conv_len,
4119 KSMBD_DIR_INFO_ALIGNMENT);
4120
4121 if (next_entry_offset > d_info->out_buf_len) {
4122 d_info->out_buf_len = 0;
4123 return -ENOSPC;
4124 }
4125
4126 switch (info_level) {
4127 case FILE_FULL_DIRECTORY_INFORMATION:
4128 {
4129 struct file_full_directory_info *ffdinfo;
4130
4131 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
4132 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
4133 ffdinfo->FileName[d_info->name_len] = 0x00;
4134 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4135 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4136 break;
4137 }
4138 case FILE_BOTH_DIRECTORY_INFORMATION:
4139 {
4140 struct file_both_directory_info *fbdinfo;
4141
4142 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
4143 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
4144 fbdinfo->FileName[d_info->name_len] = 0x00;
4145 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4146 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4147 break;
4148 }
4149 case FILE_DIRECTORY_INFORMATION:
4150 {
4151 struct file_directory_info *fdinfo;
4152
4153 fdinfo = (struct file_directory_info *)d_info->wptr;
4154 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
4155 fdinfo->FileName[d_info->name_len] = 0x00;
4156 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4157 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4158 break;
4159 }
4160 case FILE_NAMES_INFORMATION:
4161 {
4162 struct file_names_info *fninfo;
4163
4164 fninfo = (struct file_names_info *)d_info->wptr;
4165 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
4166 fninfo->FileName[d_info->name_len] = 0x00;
4167 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
4168 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4169 break;
4170 }
4171 case FILEID_FULL_DIRECTORY_INFORMATION:
4172 {
4173 struct file_id_full_dir_info *dinfo;
4174
4175 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
4176 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
4177 dinfo->FileName[d_info->name_len] = 0x00;
4178 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4179 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4180 break;
4181 }
4182 case FILEID_BOTH_DIRECTORY_INFORMATION:
4183 {
4184 struct file_id_both_directory_info *fibdinfo;
4185
4186 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
4187 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
4188 fibdinfo->FileName[d_info->name_len] = 0x00;
4189 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
4190 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
4191 break;
4192 }
4193 case SMB_FIND_FILE_POSIX_INFO:
4194 {
4195 struct smb2_posix_info *posix_info;
4196
4197 posix_info = (struct smb2_posix_info *)d_info->wptr;
4198 memcpy(posix_info->name, d_info->name, d_info->name_len);
4199 posix_info->name[d_info->name_len] = 0x00;
4200 posix_info->name_len = cpu_to_le32(d_info->name_len);
4201 posix_info->NextEntryOffset =
4202 cpu_to_le32(next_entry_offset);
4203 break;
4204 }
4205 } /* switch (info_level) */
4206
4207 d_info->num_entry++;
4208 d_info->out_buf_len -= next_entry_offset;
4209 d_info->wptr += next_entry_offset;
4210 return 0;
4211 }
4212
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)4213 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
4214 loff_t offset, u64 ino, unsigned int d_type)
4215 {
4216 struct ksmbd_readdir_data *buf;
4217 struct smb2_query_dir_private *priv;
4218 struct ksmbd_dir_info *d_info;
4219 int rc;
4220
4221 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
4222 priv = buf->private;
4223 d_info = priv->d_info;
4224
4225 /* dot and dotdot entries are already reserved */
4226 if (!strcmp(".", name) || !strcmp("..", name))
4227 return true;
4228 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
4229 return true;
4230 if (!match_pattern(name, namlen, priv->search_pattern))
4231 return true;
4232
4233 d_info->name = name;
4234 d_info->name_len = namlen;
4235 rc = reserve_populate_dentry(d_info, priv->info_level);
4236 if (rc)
4237 return false;
4238 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
4239 d_info->out_buf_len = 0;
4240 return true;
4241 }
4242
verify_info_level(int info_level)4243 static int verify_info_level(int info_level)
4244 {
4245 switch (info_level) {
4246 case FILE_FULL_DIRECTORY_INFORMATION:
4247 case FILE_BOTH_DIRECTORY_INFORMATION:
4248 case FILE_DIRECTORY_INFORMATION:
4249 case FILE_NAMES_INFORMATION:
4250 case FILEID_FULL_DIRECTORY_INFORMATION:
4251 case FILEID_BOTH_DIRECTORY_INFORMATION:
4252 case SMB_FIND_FILE_POSIX_INFO:
4253 break;
4254 default:
4255 return -EOPNOTSUPP;
4256 }
4257
4258 return 0;
4259 }
4260
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4261 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4262 {
4263 int free_len;
4264
4265 free_len = (int)(work->response_sz -
4266 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4267 return free_len;
4268 }
4269
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4270 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4271 unsigned short hdr2_len,
4272 unsigned int out_buf_len)
4273 {
4274 int free_len;
4275
4276 if (out_buf_len > work->conn->vals->max_trans_size)
4277 return -EINVAL;
4278
4279 free_len = smb2_resp_buf_len(work, hdr2_len);
4280 if (free_len < 0)
4281 return -EINVAL;
4282
4283 return min_t(int, out_buf_len, free_len);
4284 }
4285
smb2_query_dir(struct ksmbd_work * work)4286 int smb2_query_dir(struct ksmbd_work *work)
4287 {
4288 struct ksmbd_conn *conn = work->conn;
4289 struct smb2_query_directory_req *req;
4290 struct smb2_query_directory_rsp *rsp;
4291 struct ksmbd_share_config *share = work->tcon->share_conf;
4292 struct ksmbd_file *dir_fp = NULL;
4293 struct ksmbd_dir_info d_info;
4294 int rc = 0;
4295 char *srch_ptr = NULL;
4296 unsigned char srch_flag;
4297 int buffer_sz;
4298 struct smb2_query_dir_private query_dir_private = {NULL, };
4299
4300 WORK_BUFFERS(work, req, rsp);
4301
4302 if (ksmbd_override_fsids(work)) {
4303 rsp->hdr.Status = STATUS_NO_MEMORY;
4304 smb2_set_err_rsp(work);
4305 return -ENOMEM;
4306 }
4307
4308 rc = verify_info_level(req->FileInformationClass);
4309 if (rc) {
4310 rc = -EFAULT;
4311 goto err_out2;
4312 }
4313
4314 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4315 if (!dir_fp) {
4316 rc = -EBADF;
4317 goto err_out2;
4318 }
4319
4320 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4321 inode_permission(file_mnt_idmap(dir_fp->filp),
4322 file_inode(dir_fp->filp),
4323 MAY_READ | MAY_EXEC)) {
4324 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4325 rc = -EACCES;
4326 goto err_out2;
4327 }
4328
4329 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4330 pr_err("can't do query dir for a file\n");
4331 rc = -EINVAL;
4332 goto err_out2;
4333 }
4334
4335 srch_flag = req->Flags;
4336 srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),
4337 le16_to_cpu(req->FileNameLength), 1,
4338 conn->local_nls);
4339 if (IS_ERR(srch_ptr)) {
4340 ksmbd_debug(SMB, "Search Pattern not found\n");
4341 rc = -EINVAL;
4342 goto err_out2;
4343 } else {
4344 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4345 }
4346
4347 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4348 ksmbd_debug(SMB, "Restart directory scan\n");
4349 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4350 }
4351
4352 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4353 d_info.wptr = (char *)rsp->Buffer;
4354 d_info.rptr = (char *)rsp->Buffer;
4355 d_info.out_buf_len =
4356 smb2_calc_max_out_buf_len(work, 8,
4357 le32_to_cpu(req->OutputBufferLength));
4358 if (d_info.out_buf_len < 0) {
4359 rc = -EINVAL;
4360 goto err_out;
4361 }
4362 d_info.flags = srch_flag;
4363
4364 /*
4365 * reserve dot and dotdot entries in head of buffer
4366 * in first response
4367 */
4368 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4369 dir_fp, &d_info, srch_ptr,
4370 smb2_populate_readdir_entry);
4371 if (rc == -ENOSPC)
4372 rc = 0;
4373 else if (rc)
4374 goto err_out;
4375
4376 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4377 d_info.hide_dot_file = true;
4378
4379 buffer_sz = d_info.out_buf_len;
4380 d_info.rptr = d_info.wptr;
4381 query_dir_private.work = work;
4382 query_dir_private.search_pattern = srch_ptr;
4383 query_dir_private.dir_fp = dir_fp;
4384 query_dir_private.d_info = &d_info;
4385 query_dir_private.info_level = req->FileInformationClass;
4386 dir_fp->readdir_data.private = &query_dir_private;
4387 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4388
4389 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4390 /*
4391 * req->OutputBufferLength is too small to contain even one entry.
4392 * In this case, it immediately returns OutputBufferLength 0 to client.
4393 */
4394 if (!d_info.out_buf_len && !d_info.num_entry)
4395 goto no_buf_len;
4396 if (rc > 0 || rc == -ENOSPC)
4397 rc = 0;
4398 else if (rc)
4399 goto err_out;
4400
4401 d_info.wptr = d_info.rptr;
4402 d_info.out_buf_len = buffer_sz;
4403 rc = process_query_dir_entries(&query_dir_private);
4404 if (rc)
4405 goto err_out;
4406
4407 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4408 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4409 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4410 } else {
4411 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4412 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4413 }
4414 rsp->StructureSize = cpu_to_le16(9);
4415 rsp->OutputBufferOffset = cpu_to_le16(0);
4416 rsp->OutputBufferLength = cpu_to_le32(0);
4417 rsp->Buffer[0] = 0;
4418 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4419 offsetof(struct smb2_query_directory_rsp, Buffer)
4420 + 1);
4421 if (rc)
4422 goto err_out;
4423 } else {
4424 no_buf_len:
4425 ((struct file_directory_info *)
4426 ((char *)rsp->Buffer + d_info.last_entry_offset))
4427 ->NextEntryOffset = 0;
4428 if (d_info.data_count >= d_info.last_entry_off_align)
4429 d_info.data_count -= d_info.last_entry_off_align;
4430
4431 rsp->StructureSize = cpu_to_le16(9);
4432 rsp->OutputBufferOffset = cpu_to_le16(72);
4433 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4434 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4435 offsetof(struct smb2_query_directory_rsp, Buffer) +
4436 d_info.data_count);
4437 if (rc)
4438 goto err_out;
4439 }
4440
4441 kfree(srch_ptr);
4442 ksmbd_fd_put(work, dir_fp);
4443 ksmbd_revert_fsids(work);
4444 return 0;
4445
4446 err_out:
4447 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4448 kfree(srch_ptr);
4449
4450 err_out2:
4451 if (rc == -EINVAL)
4452 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4453 else if (rc == -EACCES)
4454 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4455 else if (rc == -ENOENT)
4456 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4457 else if (rc == -EBADF)
4458 rsp->hdr.Status = STATUS_FILE_CLOSED;
4459 else if (rc == -ENOMEM)
4460 rsp->hdr.Status = STATUS_NO_MEMORY;
4461 else if (rc == -EFAULT)
4462 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4463 else if (rc == -EIO)
4464 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4465 if (!rsp->hdr.Status)
4466 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4467
4468 smb2_set_err_rsp(work);
4469 ksmbd_fd_put(work, dir_fp);
4470 ksmbd_revert_fsids(work);
4471 return 0;
4472 }
4473
4474 /**
4475 * buffer_check_err() - helper function to check buffer errors
4476 * @reqOutputBufferLength: max buffer length expected in command response
4477 * @rsp: query info response buffer contains output buffer length
4478 * @rsp_org: base response buffer pointer in case of chained response
4479 *
4480 * Return: 0 on success, otherwise error
4481 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4482 static int buffer_check_err(int reqOutputBufferLength,
4483 struct smb2_query_info_rsp *rsp,
4484 void *rsp_org)
4485 {
4486 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4487 pr_err("Invalid Buffer Size Requested\n");
4488 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4489 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4490 return -EINVAL;
4491 }
4492 return 0;
4493 }
4494
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4495 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4496 void *rsp_org)
4497 {
4498 struct smb2_file_standard_info *sinfo;
4499
4500 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4501
4502 sinfo->AllocationSize = cpu_to_le64(4096);
4503 sinfo->EndOfFile = cpu_to_le64(0);
4504 sinfo->NumberOfLinks = cpu_to_le32(1);
4505 sinfo->DeletePending = 1;
4506 sinfo->Directory = 0;
4507 rsp->OutputBufferLength =
4508 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4509 }
4510
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4511 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4512 void *rsp_org)
4513 {
4514 struct smb2_file_internal_info *file_info;
4515
4516 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4517
4518 /* any unique number */
4519 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4520 rsp->OutputBufferLength =
4521 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4522 }
4523
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4524 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4525 struct smb2_query_info_req *req,
4526 struct smb2_query_info_rsp *rsp,
4527 void *rsp_org)
4528 {
4529 u64 id;
4530 int rc;
4531
4532 /*
4533 * Windows can sometime send query file info request on
4534 * pipe without opening it, checking error condition here
4535 */
4536 id = req->VolatileFileId;
4537 if (!ksmbd_session_rpc_method(sess, id))
4538 return -ENOENT;
4539
4540 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4541 req->FileInfoClass, req->VolatileFileId);
4542
4543 switch (req->FileInfoClass) {
4544 case FILE_STANDARD_INFORMATION:
4545 get_standard_info_pipe(rsp, rsp_org);
4546 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4547 rsp, rsp_org);
4548 break;
4549 case FILE_INTERNAL_INFORMATION:
4550 get_internal_info_pipe(rsp, id, rsp_org);
4551 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4552 rsp, rsp_org);
4553 break;
4554 default:
4555 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4556 req->FileInfoClass);
4557 rc = -EOPNOTSUPP;
4558 }
4559 return rc;
4560 }
4561
4562 /**
4563 * smb2_get_ea() - handler for smb2 get extended attribute command
4564 * @work: smb work containing query info command buffer
4565 * @fp: ksmbd_file pointer
4566 * @req: get extended attribute request
4567 * @rsp: response buffer pointer
4568 * @rsp_org: base response buffer pointer in case of chained response
4569 *
4570 * Return: 0 on success, otherwise error
4571 */
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)4572 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4573 struct smb2_query_info_req *req,
4574 struct smb2_query_info_rsp *rsp, void *rsp_org)
4575 {
4576 struct smb2_ea_info *eainfo, *prev_eainfo;
4577 char *name, *ptr, *xattr_list = NULL, *buf;
4578 int rc, name_len, value_len, xattr_list_len, idx;
4579 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4580 struct smb2_ea_info_req *ea_req = NULL;
4581 const struct path *path;
4582 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4583
4584 if (!(fp->daccess & FILE_READ_EA_LE)) {
4585 pr_err("Not permitted to read ext attr : 0x%x\n",
4586 fp->daccess);
4587 return -EACCES;
4588 }
4589
4590 path = &fp->filp->f_path;
4591 /* single EA entry is requested with given user.* name */
4592 if (req->InputBufferLength) {
4593 if (le32_to_cpu(req->InputBufferLength) <
4594 sizeof(struct smb2_ea_info_req))
4595 return -EINVAL;
4596
4597 ea_req = (struct smb2_ea_info_req *)((char *)req +
4598 le16_to_cpu(req->InputBufferOffset));
4599 } else {
4600 /* need to send all EAs, if no specific EA is requested*/
4601 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4602 ksmbd_debug(SMB,
4603 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4604 le32_to_cpu(req->Flags));
4605 }
4606
4607 buf_free_len =
4608 smb2_calc_max_out_buf_len(work, 8,
4609 le32_to_cpu(req->OutputBufferLength));
4610 if (buf_free_len < 0)
4611 return -EINVAL;
4612
4613 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4614 if (rc < 0) {
4615 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4616 goto out;
4617 } else if (!rc) { /* there is no EA in the file */
4618 ksmbd_debug(SMB, "no ea data in the file\n");
4619 goto done;
4620 }
4621 xattr_list_len = rc;
4622
4623 ptr = (char *)rsp->Buffer;
4624 eainfo = (struct smb2_ea_info *)ptr;
4625 prev_eainfo = eainfo;
4626 idx = 0;
4627
4628 while (idx < xattr_list_len) {
4629 name = xattr_list + idx;
4630 name_len = strlen(name);
4631
4632 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4633 idx += name_len + 1;
4634
4635 /*
4636 * CIFS does not support EA other than user.* namespace,
4637 * still keep the framework generic, to list other attrs
4638 * in future.
4639 */
4640 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4641 continue;
4642
4643 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4644 STREAM_PREFIX_LEN))
4645 continue;
4646
4647 if (req->InputBufferLength &&
4648 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4649 ea_req->EaNameLength))
4650 continue;
4651
4652 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4653 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4654 continue;
4655
4656 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4657 name_len -= XATTR_USER_PREFIX_LEN;
4658
4659 ptr = eainfo->name + name_len + 1;
4660 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4661 name_len + 1);
4662 /* bailout if xattr can't fit in buf_free_len */
4663 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4664 name, &buf);
4665 if (value_len <= 0) {
4666 rc = -ENOENT;
4667 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4668 goto out;
4669 }
4670
4671 buf_free_len -= value_len;
4672 if (buf_free_len < 0) {
4673 kfree(buf);
4674 break;
4675 }
4676
4677 memcpy(ptr, buf, value_len);
4678 kfree(buf);
4679
4680 ptr += value_len;
4681 eainfo->Flags = 0;
4682 eainfo->EaNameLength = name_len;
4683
4684 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4685 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4686 name_len);
4687 else
4688 memcpy(eainfo->name, name, name_len);
4689
4690 eainfo->name[name_len] = '\0';
4691 eainfo->EaValueLength = cpu_to_le16(value_len);
4692 next_offset = offsetof(struct smb2_ea_info, name) +
4693 name_len + 1 + value_len;
4694
4695 /* align next xattr entry at 4 byte bundary */
4696 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4697 if (alignment_bytes) {
4698 memset(ptr, '\0', alignment_bytes);
4699 ptr += alignment_bytes;
4700 next_offset += alignment_bytes;
4701 buf_free_len -= alignment_bytes;
4702 }
4703 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4704 prev_eainfo = eainfo;
4705 eainfo = (struct smb2_ea_info *)ptr;
4706 rsp_data_cnt += next_offset;
4707
4708 if (req->InputBufferLength) {
4709 ksmbd_debug(SMB, "single entry requested\n");
4710 break;
4711 }
4712 }
4713
4714 /* no more ea entries */
4715 prev_eainfo->NextEntryOffset = 0;
4716 done:
4717 rc = 0;
4718 if (rsp_data_cnt == 0)
4719 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4720 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4721 out:
4722 kvfree(xattr_list);
4723 return rc;
4724 }
4725
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4726 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4727 struct ksmbd_file *fp, void *rsp_org)
4728 {
4729 struct smb2_file_access_info *file_info;
4730
4731 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4732 file_info->AccessFlags = fp->daccess;
4733 rsp->OutputBufferLength =
4734 cpu_to_le32(sizeof(struct smb2_file_access_info));
4735 }
4736
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4737 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4738 struct ksmbd_file *fp, void *rsp_org)
4739 {
4740 struct smb2_file_basic_info *basic_info;
4741 struct kstat stat;
4742 u64 time;
4743 int ret;
4744
4745 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4746 pr_err("no right to read the attributes : 0x%x\n",
4747 fp->daccess);
4748 return -EACCES;
4749 }
4750
4751 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4752 AT_STATX_SYNC_AS_STAT);
4753 if (ret)
4754 return ret;
4755
4756 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4757 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4758 time = ksmbd_UnixTimeToNT(stat.atime);
4759 basic_info->LastAccessTime = cpu_to_le64(time);
4760 time = ksmbd_UnixTimeToNT(stat.mtime);
4761 basic_info->LastWriteTime = cpu_to_le64(time);
4762 time = ksmbd_UnixTimeToNT(stat.ctime);
4763 basic_info->ChangeTime = cpu_to_le64(time);
4764 basic_info->Attributes = fp->f_ci->m_fattr;
4765 basic_info->Pad1 = 0;
4766 rsp->OutputBufferLength =
4767 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4768 return 0;
4769 }
4770
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4771 static int get_file_standard_info(struct smb2_query_info_rsp *rsp,
4772 struct ksmbd_file *fp, void *rsp_org)
4773 {
4774 struct smb2_file_standard_info *sinfo;
4775 unsigned int delete_pending;
4776 struct kstat stat;
4777 int ret;
4778
4779 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4780 AT_STATX_SYNC_AS_STAT);
4781 if (ret)
4782 return ret;
4783
4784 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4785 delete_pending = ksmbd_inode_pending_delete(fp);
4786
4787 sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);
4788 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4789 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4790 sinfo->DeletePending = delete_pending;
4791 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4792 rsp->OutputBufferLength =
4793 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4794
4795 return 0;
4796 }
4797
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4798 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4799 void *rsp_org)
4800 {
4801 struct smb2_file_alignment_info *file_info;
4802
4803 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4804 file_info->AlignmentRequirement = 0;
4805 rsp->OutputBufferLength =
4806 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4807 }
4808
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4809 static int get_file_all_info(struct ksmbd_work *work,
4810 struct smb2_query_info_rsp *rsp,
4811 struct ksmbd_file *fp,
4812 void *rsp_org)
4813 {
4814 struct ksmbd_conn *conn = work->conn;
4815 struct smb2_file_all_info *file_info;
4816 unsigned int delete_pending;
4817 struct kstat stat;
4818 int conv_len;
4819 char *filename;
4820 u64 time;
4821 int ret;
4822
4823 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4824 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4825 fp->daccess);
4826 return -EACCES;
4827 }
4828
4829 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4830 if (IS_ERR(filename))
4831 return PTR_ERR(filename);
4832
4833 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4834 AT_STATX_SYNC_AS_STAT);
4835 if (ret)
4836 return ret;
4837
4838 ksmbd_debug(SMB, "filename = %s\n", filename);
4839 delete_pending = ksmbd_inode_pending_delete(fp);
4840 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4841
4842 file_info->CreationTime = cpu_to_le64(fp->create_time);
4843 time = ksmbd_UnixTimeToNT(stat.atime);
4844 file_info->LastAccessTime = cpu_to_le64(time);
4845 time = ksmbd_UnixTimeToNT(stat.mtime);
4846 file_info->LastWriteTime = cpu_to_le64(time);
4847 time = ksmbd_UnixTimeToNT(stat.ctime);
4848 file_info->ChangeTime = cpu_to_le64(time);
4849 file_info->Attributes = fp->f_ci->m_fattr;
4850 file_info->Pad1 = 0;
4851 file_info->AllocationSize =
4852 cpu_to_le64(stat.blocks << 9);
4853 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4854 file_info->NumberOfLinks =
4855 cpu_to_le32(get_nlink(&stat) - delete_pending);
4856 file_info->DeletePending = delete_pending;
4857 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4858 file_info->Pad2 = 0;
4859 file_info->IndexNumber = cpu_to_le64(stat.ino);
4860 file_info->EASize = 0;
4861 file_info->AccessFlags = fp->daccess;
4862 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4863 file_info->Mode = fp->coption;
4864 file_info->AlignmentRequirement = 0;
4865 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4866 PATH_MAX, conn->local_nls, 0);
4867 conv_len *= 2;
4868 file_info->FileNameLength = cpu_to_le32(conv_len);
4869 rsp->OutputBufferLength =
4870 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4871 kfree(filename);
4872 return 0;
4873 }
4874
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4875 static void get_file_alternate_info(struct ksmbd_work *work,
4876 struct smb2_query_info_rsp *rsp,
4877 struct ksmbd_file *fp,
4878 void *rsp_org)
4879 {
4880 struct ksmbd_conn *conn = work->conn;
4881 struct smb2_file_alt_name_info *file_info;
4882 struct dentry *dentry = fp->filp->f_path.dentry;
4883 int conv_len;
4884
4885 spin_lock(&dentry->d_lock);
4886 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4887 conv_len = ksmbd_extract_shortname(conn,
4888 dentry->d_name.name,
4889 file_info->FileName);
4890 spin_unlock(&dentry->d_lock);
4891 file_info->FileNameLength = cpu_to_le32(conv_len);
4892 rsp->OutputBufferLength =
4893 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4894 }
4895
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4896 static int get_file_stream_info(struct ksmbd_work *work,
4897 struct smb2_query_info_rsp *rsp,
4898 struct ksmbd_file *fp,
4899 void *rsp_org)
4900 {
4901 struct ksmbd_conn *conn = work->conn;
4902 struct smb2_file_stream_info *file_info;
4903 char *stream_name, *xattr_list = NULL, *stream_buf;
4904 struct kstat stat;
4905 const struct path *path = &fp->filp->f_path;
4906 ssize_t xattr_list_len;
4907 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4908 int buf_free_len;
4909 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4910 int ret;
4911
4912 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
4913 AT_STATX_SYNC_AS_STAT);
4914 if (ret)
4915 return ret;
4916
4917 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4918
4919 buf_free_len =
4920 smb2_calc_max_out_buf_len(work, 8,
4921 le32_to_cpu(req->OutputBufferLength));
4922 if (buf_free_len < 0)
4923 goto out;
4924
4925 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4926 if (xattr_list_len < 0) {
4927 goto out;
4928 } else if (!xattr_list_len) {
4929 ksmbd_debug(SMB, "empty xattr in the file\n");
4930 goto out;
4931 }
4932
4933 while (idx < xattr_list_len) {
4934 stream_name = xattr_list + idx;
4935 streamlen = strlen(stream_name);
4936 idx += streamlen + 1;
4937
4938 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4939
4940 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4941 STREAM_PREFIX, STREAM_PREFIX_LEN))
4942 continue;
4943
4944 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4945 STREAM_PREFIX_LEN);
4946 streamlen = stream_name_len;
4947
4948 /* plus : size */
4949 streamlen += 1;
4950 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4951 if (!stream_buf)
4952 break;
4953
4954 streamlen = snprintf(stream_buf, streamlen + 1,
4955 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4956
4957 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4958 if (next > buf_free_len) {
4959 kfree(stream_buf);
4960 break;
4961 }
4962
4963 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4964 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4965 stream_buf, streamlen,
4966 conn->local_nls, 0);
4967 streamlen *= 2;
4968 kfree(stream_buf);
4969 file_info->StreamNameLength = cpu_to_le32(streamlen);
4970 file_info->StreamSize = cpu_to_le64(stream_name_len);
4971 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4972
4973 nbytes += next;
4974 buf_free_len -= next;
4975 file_info->NextEntryOffset = cpu_to_le32(next);
4976 }
4977
4978 out:
4979 if (!S_ISDIR(stat.mode) &&
4980 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4981 file_info = (struct smb2_file_stream_info *)
4982 &rsp->Buffer[nbytes];
4983 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4984 "::$DATA", 7, conn->local_nls, 0);
4985 streamlen *= 2;
4986 file_info->StreamNameLength = cpu_to_le32(streamlen);
4987 file_info->StreamSize = cpu_to_le64(stat.size);
4988 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4989 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4990 }
4991
4992 /* last entry offset should be 0 */
4993 file_info->NextEntryOffset = 0;
4994 kvfree(xattr_list);
4995
4996 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4997
4998 return 0;
4999 }
5000
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5001 static int get_file_internal_info(struct smb2_query_info_rsp *rsp,
5002 struct ksmbd_file *fp, void *rsp_org)
5003 {
5004 struct smb2_file_internal_info *file_info;
5005 struct kstat stat;
5006 int ret;
5007
5008 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5009 AT_STATX_SYNC_AS_STAT);
5010 if (ret)
5011 return ret;
5012
5013 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
5014 file_info->IndexNumber = cpu_to_le64(stat.ino);
5015 rsp->OutputBufferLength =
5016 cpu_to_le32(sizeof(struct smb2_file_internal_info));
5017
5018 return 0;
5019 }
5020
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5021 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
5022 struct ksmbd_file *fp, void *rsp_org)
5023 {
5024 struct smb2_file_ntwrk_info *file_info;
5025 struct kstat stat;
5026 u64 time;
5027 int ret;
5028
5029 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5030 pr_err("no right to read the attributes : 0x%x\n",
5031 fp->daccess);
5032 return -EACCES;
5033 }
5034
5035 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5036 AT_STATX_SYNC_AS_STAT);
5037 if (ret)
5038 return ret;
5039
5040 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
5041
5042 file_info->CreationTime = cpu_to_le64(fp->create_time);
5043 time = ksmbd_UnixTimeToNT(stat.atime);
5044 file_info->LastAccessTime = cpu_to_le64(time);
5045 time = ksmbd_UnixTimeToNT(stat.mtime);
5046 file_info->LastWriteTime = cpu_to_le64(time);
5047 time = ksmbd_UnixTimeToNT(stat.ctime);
5048 file_info->ChangeTime = cpu_to_le64(time);
5049 file_info->Attributes = fp->f_ci->m_fattr;
5050 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5051 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
5052 file_info->Reserved = cpu_to_le32(0);
5053 rsp->OutputBufferLength =
5054 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
5055 return 0;
5056 }
5057
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)5058 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
5059 {
5060 struct smb2_file_ea_info *file_info;
5061
5062 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
5063 file_info->EASize = 0;
5064 rsp->OutputBufferLength =
5065 cpu_to_le32(sizeof(struct smb2_file_ea_info));
5066 }
5067
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5068 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
5069 struct ksmbd_file *fp, void *rsp_org)
5070 {
5071 struct smb2_file_pos_info *file_info;
5072
5073 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
5074 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
5075 rsp->OutputBufferLength =
5076 cpu_to_le32(sizeof(struct smb2_file_pos_info));
5077 }
5078
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5079 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
5080 struct ksmbd_file *fp, void *rsp_org)
5081 {
5082 struct smb2_file_mode_info *file_info;
5083
5084 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
5085 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
5086 rsp->OutputBufferLength =
5087 cpu_to_le32(sizeof(struct smb2_file_mode_info));
5088 }
5089
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5090 static int get_file_compression_info(struct smb2_query_info_rsp *rsp,
5091 struct ksmbd_file *fp, void *rsp_org)
5092 {
5093 struct smb2_file_comp_info *file_info;
5094 struct kstat stat;
5095 int ret;
5096
5097 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5098 AT_STATX_SYNC_AS_STAT);
5099 if (ret)
5100 return ret;
5101
5102 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
5103 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
5104 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
5105 file_info->CompressionUnitShift = 0;
5106 file_info->ChunkShift = 0;
5107 file_info->ClusterShift = 0;
5108 memset(&file_info->Reserved[0], 0, 3);
5109
5110 rsp->OutputBufferLength =
5111 cpu_to_le32(sizeof(struct smb2_file_comp_info));
5112
5113 return 0;
5114 }
5115
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5116 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
5117 struct ksmbd_file *fp, void *rsp_org)
5118 {
5119 struct smb2_file_attr_tag_info *file_info;
5120
5121 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
5122 pr_err("no right to read the attributes : 0x%x\n",
5123 fp->daccess);
5124 return -EACCES;
5125 }
5126
5127 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
5128 file_info->FileAttributes = fp->f_ci->m_fattr;
5129 file_info->ReparseTag = 0;
5130 rsp->OutputBufferLength =
5131 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
5132 return 0;
5133 }
5134
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)5135 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
5136 struct ksmbd_file *fp, void *rsp_org)
5137 {
5138 struct smb311_posix_qinfo *file_info;
5139 struct inode *inode = file_inode(fp->filp);
5140 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
5141 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
5142 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
5143 struct kstat stat;
5144 u64 time;
5145 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
5146 int ret;
5147
5148 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5149 AT_STATX_SYNC_AS_STAT);
5150 if (ret)
5151 return ret;
5152
5153 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
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->DosAttributes = fp->f_ci->m_fattr;
5162 file_info->Inode = cpu_to_le64(stat.ino);
5163 file_info->EndOfFile = cpu_to_le64(stat.size);
5164 file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);
5165 file_info->HardLinks = cpu_to_le32(stat.nlink);
5166 file_info->Mode = cpu_to_le32(stat.mode & 0777);
5167 file_info->DeviceId = cpu_to_le32(stat.rdev);
5168
5169 /*
5170 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
5171 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
5172 * sub_auth(4 * 1(num_subauth)) + RID(4).
5173 */
5174 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
5175 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
5176 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
5177 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
5178
5179 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
5180
5181 return 0;
5182 }
5183
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5184 static int smb2_get_info_file(struct ksmbd_work *work,
5185 struct smb2_query_info_req *req,
5186 struct smb2_query_info_rsp *rsp)
5187 {
5188 struct ksmbd_file *fp;
5189 int fileinfoclass = 0;
5190 int rc = 0;
5191 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5192
5193 if (test_share_config_flag(work->tcon->share_conf,
5194 KSMBD_SHARE_FLAG_PIPE)) {
5195 /* smb2 info file called for pipe */
5196 return smb2_get_info_file_pipe(work->sess, req, rsp,
5197 work->response_buf);
5198 }
5199
5200 if (work->next_smb2_rcv_hdr_off) {
5201 if (!has_file_id(req->VolatileFileId)) {
5202 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5203 work->compound_fid);
5204 id = work->compound_fid;
5205 pid = work->compound_pfid;
5206 }
5207 }
5208
5209 if (!has_file_id(id)) {
5210 id = req->VolatileFileId;
5211 pid = req->PersistentFileId;
5212 }
5213
5214 fp = ksmbd_lookup_fd_slow(work, id, pid);
5215 if (!fp)
5216 return -ENOENT;
5217
5218 fileinfoclass = req->FileInfoClass;
5219
5220 switch (fileinfoclass) {
5221 case FILE_ACCESS_INFORMATION:
5222 get_file_access_info(rsp, fp, work->response_buf);
5223 break;
5224
5225 case FILE_BASIC_INFORMATION:
5226 rc = get_file_basic_info(rsp, fp, work->response_buf);
5227 break;
5228
5229 case FILE_STANDARD_INFORMATION:
5230 rc = get_file_standard_info(rsp, fp, work->response_buf);
5231 break;
5232
5233 case FILE_ALIGNMENT_INFORMATION:
5234 get_file_alignment_info(rsp, work->response_buf);
5235 break;
5236
5237 case FILE_ALL_INFORMATION:
5238 rc = get_file_all_info(work, rsp, fp, work->response_buf);
5239 break;
5240
5241 case FILE_ALTERNATE_NAME_INFORMATION:
5242 get_file_alternate_info(work, rsp, fp, work->response_buf);
5243 break;
5244
5245 case FILE_STREAM_INFORMATION:
5246 rc = get_file_stream_info(work, rsp, fp, work->response_buf);
5247 break;
5248
5249 case FILE_INTERNAL_INFORMATION:
5250 rc = get_file_internal_info(rsp, fp, work->response_buf);
5251 break;
5252
5253 case FILE_NETWORK_OPEN_INFORMATION:
5254 rc = get_file_network_open_info(rsp, fp, work->response_buf);
5255 break;
5256
5257 case FILE_EA_INFORMATION:
5258 get_file_ea_info(rsp, work->response_buf);
5259 break;
5260
5261 case FILE_FULL_EA_INFORMATION:
5262 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
5263 break;
5264
5265 case FILE_POSITION_INFORMATION:
5266 get_file_position_info(rsp, fp, work->response_buf);
5267 break;
5268
5269 case FILE_MODE_INFORMATION:
5270 get_file_mode_info(rsp, fp, work->response_buf);
5271 break;
5272
5273 case FILE_COMPRESSION_INFORMATION:
5274 rc = get_file_compression_info(rsp, fp, work->response_buf);
5275 break;
5276
5277 case FILE_ATTRIBUTE_TAG_INFORMATION:
5278 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
5279 break;
5280 case SMB_FIND_FILE_POSIX_INFO:
5281 if (!work->tcon->posix_extensions) {
5282 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5283 rc = -EOPNOTSUPP;
5284 } else {
5285 rc = find_file_posix_info(rsp, fp, work->response_buf);
5286 }
5287 break;
5288 default:
5289 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
5290 fileinfoclass);
5291 rc = -EOPNOTSUPP;
5292 }
5293 if (!rc)
5294 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5295 rsp, work->response_buf);
5296 ksmbd_fd_put(work, fp);
5297 return rc;
5298 }
5299
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5300 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5301 struct smb2_query_info_req *req,
5302 struct smb2_query_info_rsp *rsp)
5303 {
5304 struct ksmbd_session *sess = work->sess;
5305 struct ksmbd_conn *conn = work->conn;
5306 struct ksmbd_share_config *share = work->tcon->share_conf;
5307 int fsinfoclass = 0;
5308 struct kstatfs stfs;
5309 struct path path;
5310 int rc = 0, len;
5311
5312 if (!share->path)
5313 return -EIO;
5314
5315 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5316 if (rc) {
5317 pr_err("cannot create vfs path\n");
5318 return -EIO;
5319 }
5320
5321 rc = vfs_statfs(&path, &stfs);
5322 if (rc) {
5323 pr_err("cannot do stat of path %s\n", share->path);
5324 path_put(&path);
5325 return -EIO;
5326 }
5327
5328 fsinfoclass = req->FileInfoClass;
5329
5330 switch (fsinfoclass) {
5331 case FS_DEVICE_INFORMATION:
5332 {
5333 struct filesystem_device_info *info;
5334
5335 info = (struct filesystem_device_info *)rsp->Buffer;
5336
5337 info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);
5338 info->DeviceCharacteristics =
5339 cpu_to_le32(FILE_DEVICE_IS_MOUNTED);
5340 if (!test_tree_conn_flag(work->tcon,
5341 KSMBD_TREE_CONN_FLAG_WRITABLE))
5342 info->DeviceCharacteristics |=
5343 cpu_to_le32(FILE_READ_ONLY_DEVICE);
5344 rsp->OutputBufferLength = cpu_to_le32(8);
5345 break;
5346 }
5347 case FS_ATTRIBUTE_INFORMATION:
5348 {
5349 struct filesystem_attribute_info *info;
5350 size_t sz;
5351
5352 info = (struct filesystem_attribute_info *)rsp->Buffer;
5353 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5354 FILE_PERSISTENT_ACLS |
5355 FILE_UNICODE_ON_DISK |
5356 FILE_CASE_PRESERVED_NAMES |
5357 FILE_CASE_SENSITIVE_SEARCH |
5358 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5359
5360 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5361
5362 if (test_share_config_flag(work->tcon->share_conf,
5363 KSMBD_SHARE_FLAG_STREAMS))
5364 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5365
5366 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5367 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5368 "NTFS", PATH_MAX, conn->local_nls, 0);
5369 len = len * 2;
5370 info->FileSystemNameLen = cpu_to_le32(len);
5371 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5372 rsp->OutputBufferLength = cpu_to_le32(sz);
5373 break;
5374 }
5375 case FS_VOLUME_INFORMATION:
5376 {
5377 struct filesystem_vol_info *info;
5378 size_t sz;
5379 unsigned int serial_crc = 0;
5380
5381 info = (struct filesystem_vol_info *)(rsp->Buffer);
5382 info->VolumeCreationTime = 0;
5383 serial_crc = crc32_le(serial_crc, share->name,
5384 strlen(share->name));
5385 serial_crc = crc32_le(serial_crc, share->path,
5386 strlen(share->path));
5387 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5388 strlen(ksmbd_netbios_name()));
5389 /* Taking dummy value of serial number*/
5390 info->SerialNumber = cpu_to_le32(serial_crc);
5391 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5392 share->name, PATH_MAX,
5393 conn->local_nls, 0);
5394 len = len * 2;
5395 info->VolumeLabelSize = cpu_to_le32(len);
5396 info->Reserved = 0;
5397 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5398 rsp->OutputBufferLength = cpu_to_le32(sz);
5399 break;
5400 }
5401 case FS_SIZE_INFORMATION:
5402 {
5403 struct filesystem_info *info;
5404
5405 info = (struct filesystem_info *)(rsp->Buffer);
5406 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5407 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5408 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5409 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5410 rsp->OutputBufferLength = cpu_to_le32(24);
5411 break;
5412 }
5413 case FS_FULL_SIZE_INFORMATION:
5414 {
5415 struct smb2_fs_full_size_info *info;
5416
5417 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5418 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5419 info->CallerAvailableAllocationUnits =
5420 cpu_to_le64(stfs.f_bavail);
5421 info->ActualAvailableAllocationUnits =
5422 cpu_to_le64(stfs.f_bfree);
5423 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5424 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5425 rsp->OutputBufferLength = cpu_to_le32(32);
5426 break;
5427 }
5428 case FS_OBJECT_ID_INFORMATION:
5429 {
5430 struct object_id_info *info;
5431
5432 info = (struct object_id_info *)(rsp->Buffer);
5433
5434 if (!user_guest(sess->user))
5435 memcpy(info->objid, user_passkey(sess->user), 16);
5436 else
5437 memset(info->objid, 0, 16);
5438
5439 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5440 info->extended_info.version = cpu_to_le32(1);
5441 info->extended_info.release = cpu_to_le32(1);
5442 info->extended_info.rel_date = 0;
5443 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5444 rsp->OutputBufferLength = cpu_to_le32(64);
5445 break;
5446 }
5447 case FS_SECTOR_SIZE_INFORMATION:
5448 {
5449 struct smb3_fs_ss_info *info;
5450 unsigned int sector_size =
5451 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5452
5453 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5454
5455 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5456 info->PhysicalBytesPerSectorForAtomicity =
5457 cpu_to_le32(sector_size);
5458 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5459 info->FSEffPhysicalBytesPerSectorForAtomicity =
5460 cpu_to_le32(sector_size);
5461 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5462 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5463 info->ByteOffsetForSectorAlignment = 0;
5464 info->ByteOffsetForPartitionAlignment = 0;
5465 rsp->OutputBufferLength = cpu_to_le32(28);
5466 break;
5467 }
5468 case FS_CONTROL_INFORMATION:
5469 {
5470 /*
5471 * TODO : The current implementation is based on
5472 * test result with win7(NTFS) server. It's need to
5473 * modify this to get valid Quota values
5474 * from Linux kernel
5475 */
5476 struct smb2_fs_control_info *info;
5477
5478 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5479 info->FreeSpaceStartFiltering = 0;
5480 info->FreeSpaceThreshold = 0;
5481 info->FreeSpaceStopFiltering = 0;
5482 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5483 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5484 info->Padding = 0;
5485 rsp->OutputBufferLength = cpu_to_le32(48);
5486 break;
5487 }
5488 case FS_POSIX_INFORMATION:
5489 {
5490 struct filesystem_posix_info *info;
5491
5492 if (!work->tcon->posix_extensions) {
5493 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5494 rc = -EOPNOTSUPP;
5495 } else {
5496 info = (struct filesystem_posix_info *)(rsp->Buffer);
5497 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5498 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5499 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5500 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5501 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5502 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5503 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5504 rsp->OutputBufferLength = cpu_to_le32(56);
5505 }
5506 break;
5507 }
5508 default:
5509 path_put(&path);
5510 return -EOPNOTSUPP;
5511 }
5512 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5513 rsp, work->response_buf);
5514 path_put(&path);
5515 return rc;
5516 }
5517
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5518 static int smb2_get_info_sec(struct ksmbd_work *work,
5519 struct smb2_query_info_req *req,
5520 struct smb2_query_info_rsp *rsp)
5521 {
5522 struct ksmbd_file *fp;
5523 struct mnt_idmap *idmap;
5524 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5525 struct smb_fattr fattr = {{0}};
5526 struct inode *inode;
5527 __u32 secdesclen = 0;
5528 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5529 int addition_info = le32_to_cpu(req->AdditionalInformation);
5530 int rc = 0, ppntsd_size = 0;
5531
5532 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5533 PROTECTED_DACL_SECINFO |
5534 UNPROTECTED_DACL_SECINFO)) {
5535 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5536 addition_info);
5537
5538 pntsd->revision = cpu_to_le16(1);
5539 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5540 pntsd->osidoffset = 0;
5541 pntsd->gsidoffset = 0;
5542 pntsd->sacloffset = 0;
5543 pntsd->dacloffset = 0;
5544
5545 secdesclen = sizeof(struct smb_ntsd);
5546 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5547
5548 return 0;
5549 }
5550
5551 if (work->next_smb2_rcv_hdr_off) {
5552 if (!has_file_id(req->VolatileFileId)) {
5553 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5554 work->compound_fid);
5555 id = work->compound_fid;
5556 pid = work->compound_pfid;
5557 }
5558 }
5559
5560 if (!has_file_id(id)) {
5561 id = req->VolatileFileId;
5562 pid = req->PersistentFileId;
5563 }
5564
5565 fp = ksmbd_lookup_fd_slow(work, id, pid);
5566 if (!fp)
5567 return -ENOENT;
5568
5569 idmap = file_mnt_idmap(fp->filp);
5570 inode = file_inode(fp->filp);
5571 ksmbd_acls_fattr(&fattr, idmap, inode);
5572
5573 if (test_share_config_flag(work->tcon->share_conf,
5574 KSMBD_SHARE_FLAG_ACL_XATTR))
5575 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5576 fp->filp->f_path.dentry,
5577 &ppntsd);
5578
5579 /* Check if sd buffer size exceeds response buffer size */
5580 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5581 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5582 addition_info, &secdesclen, &fattr);
5583 posix_acl_release(fattr.cf_acls);
5584 posix_acl_release(fattr.cf_dacls);
5585 kfree(ppntsd);
5586 ksmbd_fd_put(work, fp);
5587 if (rc)
5588 return rc;
5589
5590 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5591 return 0;
5592 }
5593
5594 /**
5595 * smb2_query_info() - handler for smb2 query info command
5596 * @work: smb work containing query info request buffer
5597 *
5598 * Return: 0 on success, otherwise error
5599 */
smb2_query_info(struct ksmbd_work * work)5600 int smb2_query_info(struct ksmbd_work *work)
5601 {
5602 struct smb2_query_info_req *req;
5603 struct smb2_query_info_rsp *rsp;
5604 int rc = 0;
5605
5606 WORK_BUFFERS(work, req, rsp);
5607
5608 ksmbd_debug(SMB, "GOT query info request\n");
5609
5610 if (ksmbd_override_fsids(work)) {
5611 rc = -ENOMEM;
5612 goto err_out;
5613 }
5614
5615 switch (req->InfoType) {
5616 case SMB2_O_INFO_FILE:
5617 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5618 rc = smb2_get_info_file(work, req, rsp);
5619 break;
5620 case SMB2_O_INFO_FILESYSTEM:
5621 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5622 rc = smb2_get_info_filesystem(work, req, rsp);
5623 break;
5624 case SMB2_O_INFO_SECURITY:
5625 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5626 rc = smb2_get_info_sec(work, req, rsp);
5627 break;
5628 default:
5629 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5630 req->InfoType);
5631 rc = -EOPNOTSUPP;
5632 }
5633 ksmbd_revert_fsids(work);
5634
5635 if (!rc) {
5636 rsp->StructureSize = cpu_to_le16(9);
5637 rsp->OutputBufferOffset = cpu_to_le16(72);
5638 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5639 offsetof(struct smb2_query_info_rsp, Buffer) +
5640 le32_to_cpu(rsp->OutputBufferLength));
5641 }
5642
5643 err_out:
5644 if (rc < 0) {
5645 if (rc == -EACCES)
5646 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5647 else if (rc == -ENOENT)
5648 rsp->hdr.Status = STATUS_FILE_CLOSED;
5649 else if (rc == -EIO)
5650 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5651 else if (rc == -ENOMEM)
5652 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5653 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5654 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5655 smb2_set_err_rsp(work);
5656
5657 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5658 rc);
5659 return rc;
5660 }
5661 return 0;
5662 }
5663
5664 /**
5665 * smb2_close_pipe() - handler for closing IPC pipe
5666 * @work: smb work containing close request buffer
5667 *
5668 * Return: 0
5669 */
smb2_close_pipe(struct ksmbd_work * work)5670 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5671 {
5672 u64 id;
5673 struct smb2_close_req *req;
5674 struct smb2_close_rsp *rsp;
5675
5676 WORK_BUFFERS(work, req, rsp);
5677
5678 id = req->VolatileFileId;
5679 ksmbd_session_rpc_close(work->sess, id);
5680
5681 rsp->StructureSize = cpu_to_le16(60);
5682 rsp->Flags = 0;
5683 rsp->Reserved = 0;
5684 rsp->CreationTime = 0;
5685 rsp->LastAccessTime = 0;
5686 rsp->LastWriteTime = 0;
5687 rsp->ChangeTime = 0;
5688 rsp->AllocationSize = 0;
5689 rsp->EndOfFile = 0;
5690 rsp->Attributes = 0;
5691
5692 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5693 sizeof(struct smb2_close_rsp));
5694 }
5695
5696 /**
5697 * smb2_close() - handler for smb2 close file command
5698 * @work: smb work containing close request buffer
5699 *
5700 * Return: 0
5701 */
smb2_close(struct ksmbd_work * work)5702 int smb2_close(struct ksmbd_work *work)
5703 {
5704 u64 volatile_id = KSMBD_NO_FID;
5705 u64 sess_id;
5706 struct smb2_close_req *req;
5707 struct smb2_close_rsp *rsp;
5708 struct ksmbd_conn *conn = work->conn;
5709 struct ksmbd_file *fp;
5710 u64 time;
5711 int err = 0;
5712
5713 WORK_BUFFERS(work, req, rsp);
5714
5715 if (test_share_config_flag(work->tcon->share_conf,
5716 KSMBD_SHARE_FLAG_PIPE)) {
5717 ksmbd_debug(SMB, "IPC pipe close request\n");
5718 return smb2_close_pipe(work);
5719 }
5720
5721 sess_id = le64_to_cpu(req->hdr.SessionId);
5722 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5723 sess_id = work->compound_sid;
5724
5725 work->compound_sid = 0;
5726 if (check_session_id(conn, sess_id)) {
5727 work->compound_sid = sess_id;
5728 } else {
5729 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5730 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5731 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5732 err = -EBADF;
5733 goto out;
5734 }
5735
5736 if (work->next_smb2_rcv_hdr_off &&
5737 !has_file_id(req->VolatileFileId)) {
5738 if (!has_file_id(work->compound_fid)) {
5739 /* file already closed, return FILE_CLOSED */
5740 ksmbd_debug(SMB, "file already closed\n");
5741 rsp->hdr.Status = STATUS_FILE_CLOSED;
5742 err = -EBADF;
5743 goto out;
5744 } else {
5745 ksmbd_debug(SMB,
5746 "Compound request set FID = %llu:%llu\n",
5747 work->compound_fid,
5748 work->compound_pfid);
5749 volatile_id = work->compound_fid;
5750
5751 /* file closed, stored id is not valid anymore */
5752 work->compound_fid = KSMBD_NO_FID;
5753 work->compound_pfid = KSMBD_NO_FID;
5754 }
5755 } else {
5756 volatile_id = req->VolatileFileId;
5757 }
5758 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5759
5760 rsp->StructureSize = cpu_to_le16(60);
5761 rsp->Reserved = 0;
5762
5763 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5764 struct kstat stat;
5765 int ret;
5766
5767 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5768 if (!fp) {
5769 err = -ENOENT;
5770 goto out;
5771 }
5772
5773 ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
5774 AT_STATX_SYNC_AS_STAT);
5775 if (ret) {
5776 ksmbd_fd_put(work, fp);
5777 goto out;
5778 }
5779
5780 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5781 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
5782 cpu_to_le64(stat.blocks << 9);
5783 rsp->EndOfFile = cpu_to_le64(stat.size);
5784 rsp->Attributes = fp->f_ci->m_fattr;
5785 rsp->CreationTime = cpu_to_le64(fp->create_time);
5786 time = ksmbd_UnixTimeToNT(stat.atime);
5787 rsp->LastAccessTime = cpu_to_le64(time);
5788 time = ksmbd_UnixTimeToNT(stat.mtime);
5789 rsp->LastWriteTime = cpu_to_le64(time);
5790 time = ksmbd_UnixTimeToNT(stat.ctime);
5791 rsp->ChangeTime = cpu_to_le64(time);
5792 ksmbd_fd_put(work, fp);
5793 } else {
5794 rsp->Flags = 0;
5795 rsp->AllocationSize = 0;
5796 rsp->EndOfFile = 0;
5797 rsp->Attributes = 0;
5798 rsp->CreationTime = 0;
5799 rsp->LastAccessTime = 0;
5800 rsp->LastWriteTime = 0;
5801 rsp->ChangeTime = 0;
5802 }
5803
5804 err = ksmbd_close_fd(work, volatile_id);
5805 out:
5806 if (!err)
5807 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5808 sizeof(struct smb2_close_rsp));
5809
5810 if (err) {
5811 if (rsp->hdr.Status == 0)
5812 rsp->hdr.Status = STATUS_FILE_CLOSED;
5813 smb2_set_err_rsp(work);
5814 }
5815
5816 return err;
5817 }
5818
5819 /**
5820 * smb2_echo() - handler for smb2 echo(ping) command
5821 * @work: smb work containing echo request buffer
5822 *
5823 * Return: 0
5824 */
smb2_echo(struct ksmbd_work * work)5825 int smb2_echo(struct ksmbd_work *work)
5826 {
5827 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5828
5829 if (work->next_smb2_rcv_hdr_off)
5830 rsp = ksmbd_resp_buf_next(work);
5831
5832 rsp->StructureSize = cpu_to_le16(4);
5833 rsp->Reserved = 0;
5834 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5835 }
5836
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5837 static int smb2_rename(struct ksmbd_work *work,
5838 struct ksmbd_file *fp,
5839 struct smb2_file_rename_info *file_info,
5840 struct nls_table *local_nls)
5841 {
5842 struct ksmbd_share_config *share = fp->tcon->share_conf;
5843 char *new_name = NULL;
5844 int rc, flags = 0;
5845
5846 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5847 new_name = smb2_get_name(file_info->FileName,
5848 le32_to_cpu(file_info->FileNameLength),
5849 local_nls);
5850 if (IS_ERR(new_name))
5851 return PTR_ERR(new_name);
5852
5853 if (strchr(new_name, ':')) {
5854 int s_type;
5855 char *xattr_stream_name, *stream_name = NULL;
5856 size_t xattr_stream_size;
5857 int len;
5858
5859 rc = parse_stream_name(new_name, &stream_name, &s_type);
5860 if (rc < 0)
5861 goto out;
5862
5863 len = strlen(new_name);
5864 if (len > 0 && new_name[len - 1] != '/') {
5865 pr_err("not allow base filename in rename\n");
5866 rc = -ESHARE;
5867 goto out;
5868 }
5869
5870 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5871 &xattr_stream_name,
5872 &xattr_stream_size,
5873 s_type);
5874 if (rc)
5875 goto out;
5876
5877 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5878 &fp->filp->f_path,
5879 xattr_stream_name,
5880 NULL, 0, 0, true);
5881 if (rc < 0) {
5882 pr_err("failed to store stream name in xattr: %d\n",
5883 rc);
5884 rc = -EINVAL;
5885 goto out;
5886 }
5887
5888 goto out;
5889 }
5890
5891 ksmbd_debug(SMB, "new name %s\n", new_name);
5892 if (ksmbd_share_veto_filename(share, new_name)) {
5893 rc = -ENOENT;
5894 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5895 goto out;
5896 }
5897
5898 if (!file_info->ReplaceIfExists)
5899 flags = RENAME_NOREPLACE;
5900
5901 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5902 if (!rc)
5903 smb_break_all_levII_oplock(work, fp, 0);
5904 out:
5905 kfree(new_name);
5906 return rc;
5907 }
5908
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)5909 static int smb2_create_link(struct ksmbd_work *work,
5910 struct ksmbd_share_config *share,
5911 struct smb2_file_link_info *file_info,
5912 unsigned int buf_len, struct file *filp,
5913 struct nls_table *local_nls)
5914 {
5915 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5916 struct path path, parent_path;
5917 bool file_present = false;
5918 int rc;
5919
5920 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5921 le32_to_cpu(file_info->FileNameLength))
5922 return -EINVAL;
5923
5924 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5925 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5926 if (!pathname)
5927 return -ENOMEM;
5928
5929 link_name = smb2_get_name(file_info->FileName,
5930 le32_to_cpu(file_info->FileNameLength),
5931 local_nls);
5932 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5933 rc = -EINVAL;
5934 goto out;
5935 }
5936
5937 ksmbd_debug(SMB, "link name is %s\n", link_name);
5938 target_name = file_path(filp, pathname, PATH_MAX);
5939 if (IS_ERR(target_name)) {
5940 rc = -EINVAL;
5941 goto out;
5942 }
5943
5944 ksmbd_debug(SMB, "target name is %s\n", target_name);
5945 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5946 &parent_path, &path, 0);
5947 if (rc) {
5948 if (rc != -ENOENT)
5949 goto out;
5950 } else
5951 file_present = true;
5952
5953 if (file_info->ReplaceIfExists) {
5954 if (file_present) {
5955 rc = ksmbd_vfs_remove_file(work, &path);
5956 if (rc) {
5957 rc = -EINVAL;
5958 ksmbd_debug(SMB, "cannot delete %s\n",
5959 link_name);
5960 goto out;
5961 }
5962 }
5963 } else {
5964 if (file_present) {
5965 rc = -EEXIST;
5966 ksmbd_debug(SMB, "link already exists\n");
5967 goto out;
5968 }
5969 }
5970
5971 rc = ksmbd_vfs_link(work, target_name, link_name);
5972 if (rc)
5973 rc = -EINVAL;
5974 out:
5975 if (file_present)
5976 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5977
5978 if (!IS_ERR(link_name))
5979 kfree(link_name);
5980 kfree(pathname);
5981 return rc;
5982 }
5983
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5984 static int set_file_basic_info(struct ksmbd_file *fp,
5985 struct smb2_file_basic_info *file_info,
5986 struct ksmbd_share_config *share)
5987 {
5988 struct iattr attrs;
5989 struct file *filp;
5990 struct inode *inode;
5991 struct mnt_idmap *idmap;
5992 int rc = 0;
5993
5994 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5995 return -EACCES;
5996
5997 attrs.ia_valid = 0;
5998 filp = fp->filp;
5999 inode = file_inode(filp);
6000 idmap = file_mnt_idmap(filp);
6001
6002 if (file_info->CreationTime)
6003 fp->create_time = le64_to_cpu(file_info->CreationTime);
6004
6005 if (file_info->LastAccessTime) {
6006 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
6007 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
6008 }
6009
6010 attrs.ia_valid |= ATTR_CTIME;
6011 if (file_info->ChangeTime)
6012 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
6013 else
6014 attrs.ia_ctime = inode_get_ctime(inode);
6015
6016 if (file_info->LastWriteTime) {
6017 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
6018 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
6019 }
6020
6021 if (file_info->Attributes) {
6022 if (!S_ISDIR(inode->i_mode) &&
6023 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
6024 pr_err("can't change a file to a directory\n");
6025 return -EINVAL;
6026 }
6027
6028 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
6029 fp->f_ci->m_fattr = file_info->Attributes |
6030 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
6031 }
6032
6033 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
6034 (file_info->CreationTime || file_info->Attributes)) {
6035 struct xattr_dos_attrib da = {0};
6036
6037 da.version = 4;
6038 da.itime = fp->itime;
6039 da.create_time = fp->create_time;
6040 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
6041 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
6042 XATTR_DOSINFO_ITIME;
6043
6044 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
6045 true);
6046 if (rc)
6047 ksmbd_debug(SMB,
6048 "failed to restore file attribute in EA\n");
6049 rc = 0;
6050 }
6051
6052 if (attrs.ia_valid) {
6053 struct dentry *dentry = filp->f_path.dentry;
6054 struct inode *inode = d_inode(dentry);
6055
6056 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
6057 return -EACCES;
6058
6059 inode_lock(inode);
6060 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
6061 attrs.ia_valid &= ~ATTR_CTIME;
6062 rc = notify_change(idmap, dentry, &attrs, NULL);
6063 inode_unlock(inode);
6064 }
6065 return rc;
6066 }
6067
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)6068 static int set_file_allocation_info(struct ksmbd_work *work,
6069 struct ksmbd_file *fp,
6070 struct smb2_file_alloc_info *file_alloc_info)
6071 {
6072 /*
6073 * TODO : It's working fine only when store dos attributes
6074 * is not yes. need to implement a logic which works
6075 * properly with any smb.conf option
6076 */
6077
6078 loff_t alloc_blks;
6079 struct inode *inode;
6080 struct kstat stat;
6081 int rc;
6082
6083 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6084 return -EACCES;
6085
6086 rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
6087 AT_STATX_SYNC_AS_STAT);
6088 if (rc)
6089 return rc;
6090
6091 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
6092 inode = file_inode(fp->filp);
6093
6094 if (alloc_blks > stat.blocks) {
6095 smb_break_all_levII_oplock(work, fp, 1);
6096 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
6097 alloc_blks * 512);
6098 if (rc && rc != -EOPNOTSUPP) {
6099 pr_err("vfs_fallocate is failed : %d\n", rc);
6100 return rc;
6101 }
6102 } else if (alloc_blks < stat.blocks) {
6103 loff_t size;
6104
6105 /*
6106 * Allocation size could be smaller than original one
6107 * which means allocated blocks in file should be
6108 * deallocated. use truncate to cut out it, but inode
6109 * size is also updated with truncate offset.
6110 * inode size is retained by backup inode size.
6111 */
6112 size = i_size_read(inode);
6113 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
6114 if (rc) {
6115 pr_err("truncate failed!, err %d\n", rc);
6116 return rc;
6117 }
6118 if (size < alloc_blks * 512)
6119 i_size_write(inode, size);
6120 }
6121 return 0;
6122 }
6123
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)6124 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6125 struct smb2_file_eof_info *file_eof_info)
6126 {
6127 loff_t newsize;
6128 struct inode *inode;
6129 int rc;
6130
6131 if (!(fp->daccess & FILE_WRITE_DATA_LE))
6132 return -EACCES;
6133
6134 newsize = le64_to_cpu(file_eof_info->EndOfFile);
6135 inode = file_inode(fp->filp);
6136
6137 /*
6138 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
6139 * on FAT32 shared device, truncate execution time is too long
6140 * and network error could cause from windows client. because
6141 * truncate of some filesystem like FAT32 fill zero data in
6142 * truncated range.
6143 */
6144 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
6145 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
6146 rc = ksmbd_vfs_truncate(work, fp, newsize);
6147 if (rc) {
6148 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
6149 if (rc != -EAGAIN)
6150 rc = -EBADF;
6151 return rc;
6152 }
6153 }
6154 return 0;
6155 }
6156
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)6157 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
6158 struct smb2_file_rename_info *rename_info,
6159 unsigned int buf_len)
6160 {
6161 if (!(fp->daccess & FILE_DELETE_LE)) {
6162 pr_err("no right to delete : 0x%x\n", fp->daccess);
6163 return -EACCES;
6164 }
6165
6166 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
6167 le32_to_cpu(rename_info->FileNameLength))
6168 return -EINVAL;
6169
6170 if (!le32_to_cpu(rename_info->FileNameLength))
6171 return -EINVAL;
6172
6173 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
6174 }
6175
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)6176 static int set_file_disposition_info(struct ksmbd_file *fp,
6177 struct smb2_file_disposition_info *file_info)
6178 {
6179 struct inode *inode;
6180
6181 if (!(fp->daccess & FILE_DELETE_LE)) {
6182 pr_err("no right to delete : 0x%x\n", fp->daccess);
6183 return -EACCES;
6184 }
6185
6186 inode = file_inode(fp->filp);
6187 if (file_info->DeletePending) {
6188 if (S_ISDIR(inode->i_mode) &&
6189 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
6190 return -EBUSY;
6191 ksmbd_set_inode_pending_delete(fp);
6192 } else {
6193 ksmbd_clear_inode_pending_delete(fp);
6194 }
6195 return 0;
6196 }
6197
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)6198 static int set_file_position_info(struct ksmbd_file *fp,
6199 struct smb2_file_pos_info *file_info)
6200 {
6201 loff_t current_byte_offset;
6202 unsigned long sector_size;
6203 struct inode *inode;
6204
6205 inode = file_inode(fp->filp);
6206 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
6207 sector_size = inode->i_sb->s_blocksize;
6208
6209 if (current_byte_offset < 0 ||
6210 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
6211 current_byte_offset & (sector_size - 1))) {
6212 pr_err("CurrentByteOffset is not valid : %llu\n",
6213 current_byte_offset);
6214 return -EINVAL;
6215 }
6216
6217 fp->filp->f_pos = current_byte_offset;
6218 return 0;
6219 }
6220
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)6221 static int set_file_mode_info(struct ksmbd_file *fp,
6222 struct smb2_file_mode_info *file_info)
6223 {
6224 __le32 mode;
6225
6226 mode = file_info->Mode;
6227
6228 if ((mode & ~FILE_MODE_INFO_MASK)) {
6229 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
6230 return -EINVAL;
6231 }
6232
6233 /*
6234 * TODO : need to implement consideration for
6235 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
6236 */
6237 ksmbd_vfs_set_fadvise(fp->filp, mode);
6238 fp->coption = mode;
6239 return 0;
6240 }
6241
6242 /**
6243 * smb2_set_info_file() - handler for smb2 set info command
6244 * @work: smb work containing set info command buffer
6245 * @fp: ksmbd_file pointer
6246 * @req: request buffer pointer
6247 * @share: ksmbd_share_config pointer
6248 *
6249 * Return: 0 on success, otherwise error
6250 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
6251 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)6252 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
6253 struct smb2_set_info_req *req,
6254 struct ksmbd_share_config *share)
6255 {
6256 unsigned int buf_len = le32_to_cpu(req->BufferLength);
6257 char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);
6258
6259 switch (req->FileInfoClass) {
6260 case FILE_BASIC_INFORMATION:
6261 {
6262 if (buf_len < sizeof(struct smb2_file_basic_info))
6263 return -EINVAL;
6264
6265 return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);
6266 }
6267 case FILE_ALLOCATION_INFORMATION:
6268 {
6269 if (buf_len < sizeof(struct smb2_file_alloc_info))
6270 return -EINVAL;
6271
6272 return set_file_allocation_info(work, fp,
6273 (struct smb2_file_alloc_info *)buffer);
6274 }
6275 case FILE_END_OF_FILE_INFORMATION:
6276 {
6277 if (buf_len < sizeof(struct smb2_file_eof_info))
6278 return -EINVAL;
6279
6280 return set_end_of_file_info(work, fp,
6281 (struct smb2_file_eof_info *)buffer);
6282 }
6283 case FILE_RENAME_INFORMATION:
6284 {
6285 if (buf_len < sizeof(struct smb2_file_rename_info))
6286 return -EINVAL;
6287
6288 return set_rename_info(work, fp,
6289 (struct smb2_file_rename_info *)buffer,
6290 buf_len);
6291 }
6292 case FILE_LINK_INFORMATION:
6293 {
6294 if (buf_len < sizeof(struct smb2_file_link_info))
6295 return -EINVAL;
6296
6297 return smb2_create_link(work, work->tcon->share_conf,
6298 (struct smb2_file_link_info *)buffer,
6299 buf_len, fp->filp,
6300 work->conn->local_nls);
6301 }
6302 case FILE_DISPOSITION_INFORMATION:
6303 {
6304 if (buf_len < sizeof(struct smb2_file_disposition_info))
6305 return -EINVAL;
6306
6307 return set_file_disposition_info(fp,
6308 (struct smb2_file_disposition_info *)buffer);
6309 }
6310 case FILE_FULL_EA_INFORMATION:
6311 {
6312 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
6313 pr_err("Not permitted to write ext attr: 0x%x\n",
6314 fp->daccess);
6315 return -EACCES;
6316 }
6317
6318 if (buf_len < sizeof(struct smb2_ea_info))
6319 return -EINVAL;
6320
6321 return smb2_set_ea((struct smb2_ea_info *)buffer,
6322 buf_len, &fp->filp->f_path, true);
6323 }
6324 case FILE_POSITION_INFORMATION:
6325 {
6326 if (buf_len < sizeof(struct smb2_file_pos_info))
6327 return -EINVAL;
6328
6329 return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);
6330 }
6331 case FILE_MODE_INFORMATION:
6332 {
6333 if (buf_len < sizeof(struct smb2_file_mode_info))
6334 return -EINVAL;
6335
6336 return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);
6337 }
6338 }
6339
6340 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6341 return -EOPNOTSUPP;
6342 }
6343
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6344 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6345 char *buffer, int buf_len)
6346 {
6347 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6348
6349 fp->saccess |= FILE_SHARE_DELETE_LE;
6350
6351 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6352 buf_len, false, true);
6353 }
6354
6355 /**
6356 * smb2_set_info() - handler for smb2 set info command handler
6357 * @work: smb work containing set info request buffer
6358 *
6359 * Return: 0 on success, otherwise error
6360 */
smb2_set_info(struct ksmbd_work * work)6361 int smb2_set_info(struct ksmbd_work *work)
6362 {
6363 struct smb2_set_info_req *req;
6364 struct smb2_set_info_rsp *rsp;
6365 struct ksmbd_file *fp = NULL;
6366 int rc = 0;
6367 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6368
6369 ksmbd_debug(SMB, "Received set info request\n");
6370
6371 if (work->next_smb2_rcv_hdr_off) {
6372 req = ksmbd_req_buf_next(work);
6373 rsp = ksmbd_resp_buf_next(work);
6374 if (!has_file_id(req->VolatileFileId)) {
6375 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6376 work->compound_fid);
6377 id = work->compound_fid;
6378 pid = work->compound_pfid;
6379 }
6380 } else {
6381 req = smb2_get_msg(work->request_buf);
6382 rsp = smb2_get_msg(work->response_buf);
6383 }
6384
6385 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6386 ksmbd_debug(SMB, "User does not have write permission\n");
6387 pr_err("User does not have write permission\n");
6388 rc = -EACCES;
6389 goto err_out;
6390 }
6391
6392 if (!has_file_id(id)) {
6393 id = req->VolatileFileId;
6394 pid = req->PersistentFileId;
6395 }
6396
6397 fp = ksmbd_lookup_fd_slow(work, id, pid);
6398 if (!fp) {
6399 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6400 rc = -ENOENT;
6401 goto err_out;
6402 }
6403
6404 switch (req->InfoType) {
6405 case SMB2_O_INFO_FILE:
6406 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6407 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6408 break;
6409 case SMB2_O_INFO_SECURITY:
6410 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6411 if (ksmbd_override_fsids(work)) {
6412 rc = -ENOMEM;
6413 goto err_out;
6414 }
6415 rc = smb2_set_info_sec(fp,
6416 le32_to_cpu(req->AdditionalInformation),
6417 (char *)req + le16_to_cpu(req->BufferOffset),
6418 le32_to_cpu(req->BufferLength));
6419 ksmbd_revert_fsids(work);
6420 break;
6421 default:
6422 rc = -EOPNOTSUPP;
6423 }
6424
6425 if (rc < 0)
6426 goto err_out;
6427
6428 rsp->StructureSize = cpu_to_le16(2);
6429 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6430 sizeof(struct smb2_set_info_rsp));
6431 if (rc)
6432 goto err_out;
6433 ksmbd_fd_put(work, fp);
6434 return 0;
6435
6436 err_out:
6437 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6438 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6439 else if (rc == -EINVAL)
6440 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6441 else if (rc == -ESHARE)
6442 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6443 else if (rc == -ENOENT)
6444 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6445 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6446 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6447 else if (rc == -EAGAIN)
6448 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6449 else if (rc == -EBADF || rc == -ESTALE)
6450 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6451 else if (rc == -EEXIST)
6452 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6453 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6454 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6455 smb2_set_err_rsp(work);
6456 ksmbd_fd_put(work, fp);
6457 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6458 return rc;
6459 }
6460
6461 /**
6462 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6463 * @work: smb work containing read IPC pipe command buffer
6464 *
6465 * Return: 0 on success, otherwise error
6466 */
smb2_read_pipe(struct ksmbd_work * work)6467 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6468 {
6469 int nbytes = 0, err;
6470 u64 id;
6471 struct ksmbd_rpc_command *rpc_resp;
6472 struct smb2_read_req *req;
6473 struct smb2_read_rsp *rsp;
6474
6475 WORK_BUFFERS(work, req, rsp);
6476
6477 id = req->VolatileFileId;
6478
6479 rpc_resp = ksmbd_rpc_read(work->sess, id);
6480 if (rpc_resp) {
6481 void *aux_payload_buf;
6482
6483 if (rpc_resp->flags != KSMBD_RPC_OK) {
6484 err = -EINVAL;
6485 goto out;
6486 }
6487
6488 aux_payload_buf =
6489 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6490 if (!aux_payload_buf) {
6491 err = -ENOMEM;
6492 goto out;
6493 }
6494
6495 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6496
6497 nbytes = rpc_resp->payload_sz;
6498 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6499 offsetof(struct smb2_read_rsp, Buffer),
6500 aux_payload_buf, nbytes);
6501 if (err) {
6502 kvfree(aux_payload_buf);
6503 goto out;
6504 }
6505 kvfree(rpc_resp);
6506 } else {
6507 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6508 offsetof(struct smb2_read_rsp, Buffer));
6509 if (err)
6510 goto out;
6511 }
6512
6513 rsp->StructureSize = cpu_to_le16(17);
6514 rsp->DataOffset = 80;
6515 rsp->Reserved = 0;
6516 rsp->DataLength = cpu_to_le32(nbytes);
6517 rsp->DataRemaining = 0;
6518 rsp->Flags = 0;
6519 return 0;
6520
6521 out:
6522 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6523 smb2_set_err_rsp(work);
6524 kvfree(rpc_resp);
6525 return err;
6526 }
6527
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6528 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6529 struct smb2_buffer_desc_v1 *desc,
6530 __le32 Channel,
6531 __le16 ChannelInfoLength)
6532 {
6533 unsigned int i, ch_count;
6534
6535 if (work->conn->dialect == SMB30_PROT_ID &&
6536 Channel != SMB2_CHANNEL_RDMA_V1)
6537 return -EINVAL;
6538
6539 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6540 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6541 for (i = 0; i < ch_count; i++) {
6542 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6543 i,
6544 le32_to_cpu(desc[i].token),
6545 le32_to_cpu(desc[i].length));
6546 }
6547 }
6548 if (!ch_count)
6549 return -EINVAL;
6550
6551 work->need_invalidate_rkey =
6552 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6553 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6554 work->remote_key = le32_to_cpu(desc->token);
6555 return 0;
6556 }
6557
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6558 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6559 struct smb2_read_req *req, void *data_buf,
6560 size_t length)
6561 {
6562 int err;
6563
6564 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6565 (struct smb2_buffer_desc_v1 *)
6566 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6567 le16_to_cpu(req->ReadChannelInfoLength));
6568 if (err)
6569 return err;
6570
6571 return length;
6572 }
6573
6574 /**
6575 * smb2_read() - handler for smb2 read from file
6576 * @work: smb work containing read command buffer
6577 *
6578 * Return: 0 on success, otherwise error
6579 */
smb2_read(struct ksmbd_work * work)6580 int smb2_read(struct ksmbd_work *work)
6581 {
6582 struct ksmbd_conn *conn = work->conn;
6583 struct smb2_read_req *req;
6584 struct smb2_read_rsp *rsp;
6585 struct ksmbd_file *fp = NULL;
6586 loff_t offset;
6587 size_t length, mincount;
6588 ssize_t nbytes = 0, remain_bytes = 0;
6589 int err = 0;
6590 bool is_rdma_channel = false;
6591 unsigned int max_read_size = conn->vals->max_read_size;
6592 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6593 void *aux_payload_buf;
6594
6595 if (test_share_config_flag(work->tcon->share_conf,
6596 KSMBD_SHARE_FLAG_PIPE)) {
6597 ksmbd_debug(SMB, "IPC pipe read request\n");
6598 return smb2_read_pipe(work);
6599 }
6600
6601 if (work->next_smb2_rcv_hdr_off) {
6602 req = ksmbd_req_buf_next(work);
6603 rsp = ksmbd_resp_buf_next(work);
6604 if (!has_file_id(req->VolatileFileId)) {
6605 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6606 work->compound_fid);
6607 id = work->compound_fid;
6608 pid = work->compound_pfid;
6609 }
6610 } else {
6611 req = smb2_get_msg(work->request_buf);
6612 rsp = smb2_get_msg(work->response_buf);
6613 }
6614
6615 if (!has_file_id(id)) {
6616 id = req->VolatileFileId;
6617 pid = req->PersistentFileId;
6618 }
6619
6620 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6621 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6622 is_rdma_channel = true;
6623 max_read_size = get_smbd_max_read_write_size();
6624 }
6625
6626 if (is_rdma_channel == true) {
6627 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6628
6629 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6630 err = -EINVAL;
6631 goto out;
6632 }
6633 err = smb2_set_remote_key_for_rdma(work,
6634 (struct smb2_buffer_desc_v1 *)
6635 ((char *)req + ch_offset),
6636 req->Channel,
6637 req->ReadChannelInfoLength);
6638 if (err)
6639 goto out;
6640 }
6641
6642 fp = ksmbd_lookup_fd_slow(work, id, pid);
6643 if (!fp) {
6644 err = -ENOENT;
6645 goto out;
6646 }
6647
6648 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6649 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6650 err = -EACCES;
6651 goto out;
6652 }
6653
6654 offset = le64_to_cpu(req->Offset);
6655 length = le32_to_cpu(req->Length);
6656 mincount = le32_to_cpu(req->MinimumCount);
6657
6658 if (length > max_read_size) {
6659 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6660 max_read_size);
6661 err = -EINVAL;
6662 goto out;
6663 }
6664
6665 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6666 fp->filp, offset, length);
6667
6668 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6669 if (!aux_payload_buf) {
6670 err = -ENOMEM;
6671 goto out;
6672 }
6673
6674 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6675 if (nbytes < 0) {
6676 err = nbytes;
6677 goto out;
6678 }
6679
6680 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6681 kvfree(aux_payload_buf);
6682 rsp->hdr.Status = STATUS_END_OF_FILE;
6683 smb2_set_err_rsp(work);
6684 ksmbd_fd_put(work, fp);
6685 return 0;
6686 }
6687
6688 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6689 nbytes, offset, mincount);
6690
6691 if (is_rdma_channel == true) {
6692 /* write data to the client using rdma channel */
6693 remain_bytes = smb2_read_rdma_channel(work, req,
6694 aux_payload_buf,
6695 nbytes);
6696 kvfree(aux_payload_buf);
6697 aux_payload_buf = NULL;
6698 nbytes = 0;
6699 if (remain_bytes < 0) {
6700 err = (int)remain_bytes;
6701 goto out;
6702 }
6703 }
6704
6705 rsp->StructureSize = cpu_to_le16(17);
6706 rsp->DataOffset = 80;
6707 rsp->Reserved = 0;
6708 rsp->DataLength = cpu_to_le32(nbytes);
6709 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6710 rsp->Flags = 0;
6711 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6712 offsetof(struct smb2_read_rsp, Buffer),
6713 aux_payload_buf, nbytes);
6714 if (err) {
6715 kvfree(aux_payload_buf);
6716 goto out;
6717 }
6718 ksmbd_fd_put(work, fp);
6719 return 0;
6720
6721 out:
6722 if (err) {
6723 if (err == -EISDIR)
6724 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6725 else if (err == -EAGAIN)
6726 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6727 else if (err == -ENOENT)
6728 rsp->hdr.Status = STATUS_FILE_CLOSED;
6729 else if (err == -EACCES)
6730 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6731 else if (err == -ESHARE)
6732 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6733 else if (err == -EINVAL)
6734 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6735 else
6736 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6737
6738 smb2_set_err_rsp(work);
6739 }
6740 ksmbd_fd_put(work, fp);
6741 return err;
6742 }
6743
6744 /**
6745 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6746 * @work: smb work containing write IPC pipe command buffer
6747 *
6748 * Return: 0 on success, otherwise error
6749 */
smb2_write_pipe(struct ksmbd_work * work)6750 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6751 {
6752 struct smb2_write_req *req;
6753 struct smb2_write_rsp *rsp;
6754 struct ksmbd_rpc_command *rpc_resp;
6755 u64 id = 0;
6756 int err = 0, ret = 0;
6757 char *data_buf;
6758 size_t length;
6759
6760 WORK_BUFFERS(work, req, rsp);
6761
6762 length = le32_to_cpu(req->Length);
6763 id = req->VolatileFileId;
6764
6765 if ((u64)le16_to_cpu(req->DataOffset) + length >
6766 get_rfc1002_len(work->request_buf)) {
6767 pr_err("invalid write data offset %u, smb_len %u\n",
6768 le16_to_cpu(req->DataOffset),
6769 get_rfc1002_len(work->request_buf));
6770 err = -EINVAL;
6771 goto out;
6772 }
6773
6774 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6775 le16_to_cpu(req->DataOffset));
6776
6777 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6778 if (rpc_resp) {
6779 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6780 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6781 kvfree(rpc_resp);
6782 smb2_set_err_rsp(work);
6783 return -EOPNOTSUPP;
6784 }
6785 if (rpc_resp->flags != KSMBD_RPC_OK) {
6786 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6787 smb2_set_err_rsp(work);
6788 kvfree(rpc_resp);
6789 return ret;
6790 }
6791 kvfree(rpc_resp);
6792 }
6793
6794 rsp->StructureSize = cpu_to_le16(17);
6795 rsp->DataOffset = 0;
6796 rsp->Reserved = 0;
6797 rsp->DataLength = cpu_to_le32(length);
6798 rsp->DataRemaining = 0;
6799 rsp->Reserved2 = 0;
6800 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6801 offsetof(struct smb2_write_rsp, Buffer));
6802 out:
6803 if (err) {
6804 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6805 smb2_set_err_rsp(work);
6806 }
6807
6808 return err;
6809 }
6810
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)6811 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6812 struct smb2_write_req *req,
6813 struct ksmbd_file *fp,
6814 loff_t offset, size_t length, bool sync)
6815 {
6816 char *data_buf;
6817 int ret;
6818 ssize_t nbytes;
6819
6820 data_buf = kvzalloc(length, GFP_KERNEL);
6821 if (!data_buf)
6822 return -ENOMEM;
6823
6824 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6825 (struct smb2_buffer_desc_v1 *)
6826 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6827 le16_to_cpu(req->WriteChannelInfoLength));
6828 if (ret < 0) {
6829 kvfree(data_buf);
6830 return ret;
6831 }
6832
6833 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6834 kvfree(data_buf);
6835 if (ret < 0)
6836 return ret;
6837
6838 return nbytes;
6839 }
6840
6841 /**
6842 * smb2_write() - handler for smb2 write from file
6843 * @work: smb work containing write command buffer
6844 *
6845 * Return: 0 on success, otherwise error
6846 */
smb2_write(struct ksmbd_work * work)6847 int smb2_write(struct ksmbd_work *work)
6848 {
6849 struct smb2_write_req *req;
6850 struct smb2_write_rsp *rsp;
6851 struct ksmbd_file *fp = NULL;
6852 loff_t offset;
6853 size_t length;
6854 ssize_t nbytes;
6855 char *data_buf;
6856 bool writethrough = false, is_rdma_channel = false;
6857 int err = 0;
6858 unsigned int max_write_size = work->conn->vals->max_write_size;
6859
6860 WORK_BUFFERS(work, req, rsp);
6861
6862 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6863 ksmbd_debug(SMB, "IPC pipe write request\n");
6864 return smb2_write_pipe(work);
6865 }
6866
6867 offset = le64_to_cpu(req->Offset);
6868 length = le32_to_cpu(req->Length);
6869
6870 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6871 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6872 is_rdma_channel = true;
6873 max_write_size = get_smbd_max_read_write_size();
6874 length = le32_to_cpu(req->RemainingBytes);
6875 }
6876
6877 if (is_rdma_channel == true) {
6878 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6879
6880 if (req->Length != 0 || req->DataOffset != 0 ||
6881 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6882 err = -EINVAL;
6883 goto out;
6884 }
6885 err = smb2_set_remote_key_for_rdma(work,
6886 (struct smb2_buffer_desc_v1 *)
6887 ((char *)req + ch_offset),
6888 req->Channel,
6889 req->WriteChannelInfoLength);
6890 if (err)
6891 goto out;
6892 }
6893
6894 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6895 ksmbd_debug(SMB, "User does not have write permission\n");
6896 err = -EACCES;
6897 goto out;
6898 }
6899
6900 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6901 if (!fp) {
6902 err = -ENOENT;
6903 goto out;
6904 }
6905
6906 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6907 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6908 err = -EACCES;
6909 goto out;
6910 }
6911
6912 if (length > max_write_size) {
6913 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6914 max_write_size);
6915 err = -EINVAL;
6916 goto out;
6917 }
6918
6919 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6920 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6921 writethrough = true;
6922
6923 if (is_rdma_channel == false) {
6924 if (le16_to_cpu(req->DataOffset) <
6925 offsetof(struct smb2_write_req, Buffer)) {
6926 err = -EINVAL;
6927 goto out;
6928 }
6929
6930 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6931 le16_to_cpu(req->DataOffset));
6932
6933 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6934 fp->filp, offset, length);
6935 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6936 writethrough, &nbytes);
6937 if (err < 0)
6938 goto out;
6939 } else {
6940 /* read data from the client using rdma channel, and
6941 * write the data.
6942 */
6943 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6944 writethrough);
6945 if (nbytes < 0) {
6946 err = (int)nbytes;
6947 goto out;
6948 }
6949 }
6950
6951 rsp->StructureSize = cpu_to_le16(17);
6952 rsp->DataOffset = 0;
6953 rsp->Reserved = 0;
6954 rsp->DataLength = cpu_to_le32(nbytes);
6955 rsp->DataRemaining = 0;
6956 rsp->Reserved2 = 0;
6957 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6958 if (err)
6959 goto out;
6960 ksmbd_fd_put(work, fp);
6961 return 0;
6962
6963 out:
6964 if (err == -EAGAIN)
6965 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6966 else if (err == -ENOSPC || err == -EFBIG)
6967 rsp->hdr.Status = STATUS_DISK_FULL;
6968 else if (err == -ENOENT)
6969 rsp->hdr.Status = STATUS_FILE_CLOSED;
6970 else if (err == -EACCES)
6971 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6972 else if (err == -ESHARE)
6973 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6974 else if (err == -EINVAL)
6975 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6976 else
6977 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6978
6979 smb2_set_err_rsp(work);
6980 ksmbd_fd_put(work, fp);
6981 return err;
6982 }
6983
6984 /**
6985 * smb2_flush() - handler for smb2 flush file - fsync
6986 * @work: smb work containing flush command buffer
6987 *
6988 * Return: 0 on success, otherwise error
6989 */
smb2_flush(struct ksmbd_work * work)6990 int smb2_flush(struct ksmbd_work *work)
6991 {
6992 struct smb2_flush_req *req;
6993 struct smb2_flush_rsp *rsp;
6994 int err;
6995
6996 WORK_BUFFERS(work, req, rsp);
6997
6998 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6999
7000 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
7001 if (err)
7002 goto out;
7003
7004 rsp->StructureSize = cpu_to_le16(4);
7005 rsp->Reserved = 0;
7006 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
7007
7008 out:
7009 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7010 smb2_set_err_rsp(work);
7011 return err;
7012 }
7013
7014 /**
7015 * smb2_cancel() - handler for smb2 cancel command
7016 * @work: smb work containing cancel command buffer
7017 *
7018 * Return: 0 on success, otherwise error
7019 */
smb2_cancel(struct ksmbd_work * work)7020 int smb2_cancel(struct ksmbd_work *work)
7021 {
7022 struct ksmbd_conn *conn = work->conn;
7023 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
7024 struct smb2_hdr *chdr;
7025 struct ksmbd_work *iter;
7026 struct list_head *command_list;
7027
7028 if (work->next_smb2_rcv_hdr_off)
7029 hdr = ksmbd_resp_buf_next(work);
7030
7031 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
7032 hdr->MessageId, hdr->Flags);
7033
7034 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
7035 command_list = &conn->async_requests;
7036
7037 spin_lock(&conn->request_lock);
7038 list_for_each_entry(iter, command_list,
7039 async_request_entry) {
7040 chdr = smb2_get_msg(iter->request_buf);
7041
7042 if (iter->async_id !=
7043 le64_to_cpu(hdr->Id.AsyncId))
7044 continue;
7045
7046 ksmbd_debug(SMB,
7047 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
7048 le64_to_cpu(hdr->Id.AsyncId),
7049 le16_to_cpu(chdr->Command));
7050 iter->state = KSMBD_WORK_CANCELLED;
7051 if (iter->cancel_fn)
7052 iter->cancel_fn(iter->cancel_argv);
7053 break;
7054 }
7055 spin_unlock(&conn->request_lock);
7056 } else {
7057 command_list = &conn->requests;
7058
7059 spin_lock(&conn->request_lock);
7060 list_for_each_entry(iter, command_list, request_entry) {
7061 chdr = smb2_get_msg(iter->request_buf);
7062
7063 if (chdr->MessageId != hdr->MessageId ||
7064 iter == work)
7065 continue;
7066
7067 ksmbd_debug(SMB,
7068 "smb2 with mid %llu cancelled command = 0x%x\n",
7069 le64_to_cpu(hdr->MessageId),
7070 le16_to_cpu(chdr->Command));
7071 iter->state = KSMBD_WORK_CANCELLED;
7072 break;
7073 }
7074 spin_unlock(&conn->request_lock);
7075 }
7076
7077 /* For SMB2_CANCEL command itself send no response*/
7078 work->send_no_response = 1;
7079 return 0;
7080 }
7081
smb_flock_init(struct file * f)7082 struct file_lock *smb_flock_init(struct file *f)
7083 {
7084 struct file_lock *fl;
7085
7086 fl = locks_alloc_lock();
7087 if (!fl)
7088 goto out;
7089
7090 locks_init_lock(fl);
7091
7092 fl->fl_owner = f;
7093 fl->fl_pid = current->tgid;
7094 fl->fl_file = f;
7095 fl->fl_flags = FL_POSIX;
7096 fl->fl_ops = NULL;
7097 fl->fl_lmops = NULL;
7098
7099 out:
7100 return fl;
7101 }
7102
smb2_set_flock_flags(struct file_lock * flock,int flags)7103 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
7104 {
7105 int cmd = -EINVAL;
7106
7107 /* Checking for wrong flag combination during lock request*/
7108 switch (flags) {
7109 case SMB2_LOCKFLAG_SHARED:
7110 ksmbd_debug(SMB, "received shared request\n");
7111 cmd = F_SETLKW;
7112 flock->fl_type = F_RDLCK;
7113 flock->fl_flags |= FL_SLEEP;
7114 break;
7115 case SMB2_LOCKFLAG_EXCLUSIVE:
7116 ksmbd_debug(SMB, "received exclusive request\n");
7117 cmd = F_SETLKW;
7118 flock->fl_type = F_WRLCK;
7119 flock->fl_flags |= FL_SLEEP;
7120 break;
7121 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7122 ksmbd_debug(SMB,
7123 "received shared & fail immediately request\n");
7124 cmd = F_SETLK;
7125 flock->fl_type = F_RDLCK;
7126 break;
7127 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
7128 ksmbd_debug(SMB,
7129 "received exclusive & fail immediately request\n");
7130 cmd = F_SETLK;
7131 flock->fl_type = F_WRLCK;
7132 break;
7133 case SMB2_LOCKFLAG_UNLOCK:
7134 ksmbd_debug(SMB, "received unlock request\n");
7135 flock->fl_type = F_UNLCK;
7136 cmd = F_SETLK;
7137 break;
7138 }
7139
7140 return cmd;
7141 }
7142
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)7143 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
7144 unsigned int cmd, int flags,
7145 struct list_head *lock_list)
7146 {
7147 struct ksmbd_lock *lock;
7148
7149 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
7150 if (!lock)
7151 return NULL;
7152
7153 lock->cmd = cmd;
7154 lock->fl = flock;
7155 lock->start = flock->fl_start;
7156 lock->end = flock->fl_end;
7157 lock->flags = flags;
7158 if (lock->start == lock->end)
7159 lock->zero_len = 1;
7160 INIT_LIST_HEAD(&lock->clist);
7161 INIT_LIST_HEAD(&lock->flist);
7162 INIT_LIST_HEAD(&lock->llist);
7163 list_add_tail(&lock->llist, lock_list);
7164
7165 return lock;
7166 }
7167
smb2_remove_blocked_lock(void ** argv)7168 static void smb2_remove_blocked_lock(void **argv)
7169 {
7170 struct file_lock *flock = (struct file_lock *)argv[0];
7171
7172 ksmbd_vfs_posix_lock_unblock(flock);
7173 wake_up(&flock->fl_wait);
7174 }
7175
lock_defer_pending(struct file_lock * fl)7176 static inline bool lock_defer_pending(struct file_lock *fl)
7177 {
7178 /* check pending lock waiters */
7179 return waitqueue_active(&fl->fl_wait);
7180 }
7181
7182 /**
7183 * smb2_lock() - handler for smb2 file lock command
7184 * @work: smb work containing lock command buffer
7185 *
7186 * Return: 0 on success, otherwise error
7187 */
smb2_lock(struct ksmbd_work * work)7188 int smb2_lock(struct ksmbd_work *work)
7189 {
7190 struct smb2_lock_req *req;
7191 struct smb2_lock_rsp *rsp;
7192 struct smb2_lock_element *lock_ele;
7193 struct ksmbd_file *fp = NULL;
7194 struct file_lock *flock = NULL;
7195 struct file *filp = NULL;
7196 int lock_count;
7197 int flags = 0;
7198 int cmd = 0;
7199 int err = -EIO, i, rc = 0;
7200 u64 lock_start, lock_length;
7201 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
7202 struct ksmbd_conn *conn;
7203 int nolock = 0;
7204 LIST_HEAD(lock_list);
7205 LIST_HEAD(rollback_list);
7206 int prior_lock = 0;
7207
7208 WORK_BUFFERS(work, req, rsp);
7209
7210 ksmbd_debug(SMB, "Received lock request\n");
7211 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7212 if (!fp) {
7213 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
7214 err = -ENOENT;
7215 goto out2;
7216 }
7217
7218 filp = fp->filp;
7219 lock_count = le16_to_cpu(req->LockCount);
7220 lock_ele = req->locks;
7221
7222 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
7223 if (!lock_count) {
7224 err = -EINVAL;
7225 goto out2;
7226 }
7227
7228 for (i = 0; i < lock_count; i++) {
7229 flags = le32_to_cpu(lock_ele[i].Flags);
7230
7231 flock = smb_flock_init(filp);
7232 if (!flock)
7233 goto out;
7234
7235 cmd = smb2_set_flock_flags(flock, flags);
7236
7237 lock_start = le64_to_cpu(lock_ele[i].Offset);
7238 lock_length = le64_to_cpu(lock_ele[i].Length);
7239 if (lock_start > U64_MAX - lock_length) {
7240 pr_err("Invalid lock range requested\n");
7241 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7242 locks_free_lock(flock);
7243 goto out;
7244 }
7245
7246 if (lock_start > OFFSET_MAX)
7247 flock->fl_start = OFFSET_MAX;
7248 else
7249 flock->fl_start = lock_start;
7250
7251 lock_length = le64_to_cpu(lock_ele[i].Length);
7252 if (lock_length > OFFSET_MAX - flock->fl_start)
7253 lock_length = OFFSET_MAX - flock->fl_start;
7254
7255 flock->fl_end = flock->fl_start + lock_length;
7256
7257 if (flock->fl_end < flock->fl_start) {
7258 ksmbd_debug(SMB,
7259 "the end offset(%llx) is smaller than the start offset(%llx)\n",
7260 flock->fl_end, flock->fl_start);
7261 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
7262 locks_free_lock(flock);
7263 goto out;
7264 }
7265
7266 /* Check conflict locks in one request */
7267 list_for_each_entry(cmp_lock, &lock_list, llist) {
7268 if (cmp_lock->fl->fl_start <= flock->fl_start &&
7269 cmp_lock->fl->fl_end >= flock->fl_end) {
7270 if (cmp_lock->fl->fl_type != F_UNLCK &&
7271 flock->fl_type != F_UNLCK) {
7272 pr_err("conflict two locks in one request\n");
7273 err = -EINVAL;
7274 locks_free_lock(flock);
7275 goto out;
7276 }
7277 }
7278 }
7279
7280 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
7281 if (!smb_lock) {
7282 err = -EINVAL;
7283 locks_free_lock(flock);
7284 goto out;
7285 }
7286 }
7287
7288 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7289 if (smb_lock->cmd < 0) {
7290 err = -EINVAL;
7291 goto out;
7292 }
7293
7294 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
7295 err = -EINVAL;
7296 goto out;
7297 }
7298
7299 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
7300 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
7301 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
7302 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
7303 err = -EINVAL;
7304 goto out;
7305 }
7306
7307 prior_lock = smb_lock->flags;
7308
7309 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
7310 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
7311 goto no_check_cl;
7312
7313 nolock = 1;
7314 /* check locks in connection list */
7315 down_read(&conn_list_lock);
7316 list_for_each_entry(conn, &conn_list, conns_list) {
7317 spin_lock(&conn->llist_lock);
7318 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
7319 if (file_inode(cmp_lock->fl->fl_file) !=
7320 file_inode(smb_lock->fl->fl_file))
7321 continue;
7322
7323 if (smb_lock->fl->fl_type == F_UNLCK) {
7324 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
7325 cmp_lock->start == smb_lock->start &&
7326 cmp_lock->end == smb_lock->end &&
7327 !lock_defer_pending(cmp_lock->fl)) {
7328 nolock = 0;
7329 list_del(&cmp_lock->flist);
7330 list_del(&cmp_lock->clist);
7331 spin_unlock(&conn->llist_lock);
7332 up_read(&conn_list_lock);
7333
7334 locks_free_lock(cmp_lock->fl);
7335 kfree(cmp_lock);
7336 goto out_check_cl;
7337 }
7338 continue;
7339 }
7340
7341 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7342 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7343 continue;
7344 } else {
7345 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7346 continue;
7347 }
7348
7349 /* check zero byte lock range */
7350 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7351 cmp_lock->start > smb_lock->start &&
7352 cmp_lock->start < smb_lock->end) {
7353 spin_unlock(&conn->llist_lock);
7354 up_read(&conn_list_lock);
7355 pr_err("previous lock conflict with zero byte lock range\n");
7356 goto out;
7357 }
7358
7359 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7360 smb_lock->start > cmp_lock->start &&
7361 smb_lock->start < cmp_lock->end) {
7362 spin_unlock(&conn->llist_lock);
7363 up_read(&conn_list_lock);
7364 pr_err("current lock conflict with zero byte lock range\n");
7365 goto out;
7366 }
7367
7368 if (((cmp_lock->start <= smb_lock->start &&
7369 cmp_lock->end > smb_lock->start) ||
7370 (cmp_lock->start < smb_lock->end &&
7371 cmp_lock->end >= smb_lock->end)) &&
7372 !cmp_lock->zero_len && !smb_lock->zero_len) {
7373 spin_unlock(&conn->llist_lock);
7374 up_read(&conn_list_lock);
7375 pr_err("Not allow lock operation on exclusive lock range\n");
7376 goto out;
7377 }
7378 }
7379 spin_unlock(&conn->llist_lock);
7380 }
7381 up_read(&conn_list_lock);
7382 out_check_cl:
7383 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7384 pr_err("Try to unlock nolocked range\n");
7385 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7386 goto out;
7387 }
7388
7389 no_check_cl:
7390 if (smb_lock->zero_len) {
7391 err = 0;
7392 goto skip;
7393 }
7394
7395 flock = smb_lock->fl;
7396 list_del(&smb_lock->llist);
7397 retry:
7398 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7399 skip:
7400 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7401 if (!rc) {
7402 ksmbd_debug(SMB, "File unlocked\n");
7403 } else if (rc == -ENOENT) {
7404 rsp->hdr.Status = STATUS_NOT_LOCKED;
7405 goto out;
7406 }
7407 locks_free_lock(flock);
7408 kfree(smb_lock);
7409 } else {
7410 if (rc == FILE_LOCK_DEFERRED) {
7411 void **argv;
7412
7413 ksmbd_debug(SMB,
7414 "would have to wait for getting lock\n");
7415 list_add(&smb_lock->llist, &rollback_list);
7416
7417 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7418 if (!argv) {
7419 err = -ENOMEM;
7420 goto out;
7421 }
7422 argv[0] = flock;
7423
7424 rc = setup_async_work(work,
7425 smb2_remove_blocked_lock,
7426 argv);
7427 if (rc) {
7428 kfree(argv);
7429 err = -ENOMEM;
7430 goto out;
7431 }
7432 spin_lock(&fp->f_lock);
7433 list_add(&work->fp_entry, &fp->blocked_works);
7434 spin_unlock(&fp->f_lock);
7435
7436 smb2_send_interim_resp(work, STATUS_PENDING);
7437
7438 ksmbd_vfs_posix_lock_wait(flock);
7439
7440 spin_lock(&fp->f_lock);
7441 list_del(&work->fp_entry);
7442 spin_unlock(&fp->f_lock);
7443
7444 if (work->state != KSMBD_WORK_ACTIVE) {
7445 list_del(&smb_lock->llist);
7446 locks_free_lock(flock);
7447
7448 if (work->state == KSMBD_WORK_CANCELLED) {
7449 rsp->hdr.Status =
7450 STATUS_CANCELLED;
7451 kfree(smb_lock);
7452 smb2_send_interim_resp(work,
7453 STATUS_CANCELLED);
7454 work->send_no_response = 1;
7455 goto out;
7456 }
7457
7458 rsp->hdr.Status =
7459 STATUS_RANGE_NOT_LOCKED;
7460 kfree(smb_lock);
7461 goto out2;
7462 }
7463
7464 list_del(&smb_lock->llist);
7465 release_async_work(work);
7466 goto retry;
7467 } else if (!rc) {
7468 list_add(&smb_lock->llist, &rollback_list);
7469 spin_lock(&work->conn->llist_lock);
7470 list_add_tail(&smb_lock->clist,
7471 &work->conn->lock_list);
7472 list_add_tail(&smb_lock->flist,
7473 &fp->lock_list);
7474 spin_unlock(&work->conn->llist_lock);
7475 ksmbd_debug(SMB, "successful in taking lock\n");
7476 } else {
7477 goto out;
7478 }
7479 }
7480 }
7481
7482 if (atomic_read(&fp->f_ci->op_count) > 1)
7483 smb_break_all_oplock(work, fp);
7484
7485 rsp->StructureSize = cpu_to_le16(4);
7486 ksmbd_debug(SMB, "successful in taking lock\n");
7487 rsp->hdr.Status = STATUS_SUCCESS;
7488 rsp->Reserved = 0;
7489 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7490 if (err)
7491 goto out;
7492
7493 ksmbd_fd_put(work, fp);
7494 return 0;
7495
7496 out:
7497 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7498 locks_free_lock(smb_lock->fl);
7499 list_del(&smb_lock->llist);
7500 kfree(smb_lock);
7501 }
7502
7503 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7504 struct file_lock *rlock = NULL;
7505
7506 rlock = smb_flock_init(filp);
7507 rlock->fl_type = F_UNLCK;
7508 rlock->fl_start = smb_lock->start;
7509 rlock->fl_end = smb_lock->end;
7510
7511 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7512 if (rc)
7513 pr_err("rollback unlock fail : %d\n", rc);
7514
7515 list_del(&smb_lock->llist);
7516 spin_lock(&work->conn->llist_lock);
7517 if (!list_empty(&smb_lock->flist))
7518 list_del(&smb_lock->flist);
7519 list_del(&smb_lock->clist);
7520 spin_unlock(&work->conn->llist_lock);
7521
7522 locks_free_lock(smb_lock->fl);
7523 locks_free_lock(rlock);
7524 kfree(smb_lock);
7525 }
7526 out2:
7527 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7528
7529 if (!rsp->hdr.Status) {
7530 if (err == -EINVAL)
7531 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7532 else if (err == -ENOMEM)
7533 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7534 else if (err == -ENOENT)
7535 rsp->hdr.Status = STATUS_FILE_CLOSED;
7536 else
7537 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7538 }
7539
7540 smb2_set_err_rsp(work);
7541 ksmbd_fd_put(work, fp);
7542 return err;
7543 }
7544
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)7545 static int fsctl_copychunk(struct ksmbd_work *work,
7546 struct copychunk_ioctl_req *ci_req,
7547 unsigned int cnt_code,
7548 unsigned int input_count,
7549 unsigned long long volatile_id,
7550 unsigned long long persistent_id,
7551 struct smb2_ioctl_rsp *rsp)
7552 {
7553 struct copychunk_ioctl_rsp *ci_rsp;
7554 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7555 struct srv_copychunk *chunks;
7556 unsigned int i, chunk_count, chunk_count_written = 0;
7557 unsigned int chunk_size_written = 0;
7558 loff_t total_size_written = 0;
7559 int ret = 0;
7560
7561 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7562
7563 rsp->VolatileFileId = volatile_id;
7564 rsp->PersistentFileId = persistent_id;
7565 ci_rsp->ChunksWritten =
7566 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7567 ci_rsp->ChunkBytesWritten =
7568 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7569 ci_rsp->TotalBytesWritten =
7570 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7571
7572 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7573 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7574 if (chunk_count == 0)
7575 goto out;
7576 total_size_written = 0;
7577
7578 /* verify the SRV_COPYCHUNK_COPY packet */
7579 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7580 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7581 chunk_count * sizeof(struct srv_copychunk)) {
7582 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7583 return -EINVAL;
7584 }
7585
7586 for (i = 0; i < chunk_count; i++) {
7587 if (le32_to_cpu(chunks[i].Length) == 0 ||
7588 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7589 break;
7590 total_size_written += le32_to_cpu(chunks[i].Length);
7591 }
7592
7593 if (i < chunk_count ||
7594 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7595 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7596 return -EINVAL;
7597 }
7598
7599 src_fp = ksmbd_lookup_foreign_fd(work,
7600 le64_to_cpu(ci_req->ResumeKey[0]));
7601 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7602 ret = -EINVAL;
7603 if (!src_fp ||
7604 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7605 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7606 goto out;
7607 }
7608
7609 if (!dst_fp) {
7610 rsp->hdr.Status = STATUS_FILE_CLOSED;
7611 goto out;
7612 }
7613
7614 /*
7615 * FILE_READ_DATA should only be included in
7616 * the FSCTL_COPYCHUNK case
7617 */
7618 if (cnt_code == FSCTL_COPYCHUNK &&
7619 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7620 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7621 goto out;
7622 }
7623
7624 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7625 chunks, chunk_count,
7626 &chunk_count_written,
7627 &chunk_size_written,
7628 &total_size_written);
7629 if (ret < 0) {
7630 if (ret == -EACCES)
7631 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7632 if (ret == -EAGAIN)
7633 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7634 else if (ret == -EBADF)
7635 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7636 else if (ret == -EFBIG || ret == -ENOSPC)
7637 rsp->hdr.Status = STATUS_DISK_FULL;
7638 else if (ret == -EINVAL)
7639 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7640 else if (ret == -EISDIR)
7641 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7642 else if (ret == -E2BIG)
7643 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7644 else
7645 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7646 }
7647
7648 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7649 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7650 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7651 out:
7652 ksmbd_fd_put(work, src_fp);
7653 ksmbd_fd_put(work, dst_fp);
7654 return ret;
7655 }
7656
idev_ipv4_address(struct in_device * idev)7657 static __be32 idev_ipv4_address(struct in_device *idev)
7658 {
7659 __be32 addr = 0;
7660
7661 struct in_ifaddr *ifa;
7662
7663 rcu_read_lock();
7664 in_dev_for_each_ifa_rcu(ifa, idev) {
7665 if (ifa->ifa_flags & IFA_F_SECONDARY)
7666 continue;
7667
7668 addr = ifa->ifa_address;
7669 break;
7670 }
7671 rcu_read_unlock();
7672 return addr;
7673 }
7674
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7675 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7676 struct smb2_ioctl_rsp *rsp,
7677 unsigned int out_buf_len)
7678 {
7679 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7680 int nbytes = 0;
7681 struct net_device *netdev;
7682 struct sockaddr_storage_rsp *sockaddr_storage;
7683 unsigned int flags;
7684 unsigned long long speed;
7685
7686 rtnl_lock();
7687 for_each_netdev(&init_net, netdev) {
7688 bool ipv4_set = false;
7689
7690 if (netdev->type == ARPHRD_LOOPBACK)
7691 continue;
7692
7693 flags = dev_get_flags(netdev);
7694 if (!(flags & IFF_RUNNING))
7695 continue;
7696 ipv6_retry:
7697 if (out_buf_len <
7698 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7699 rtnl_unlock();
7700 return -ENOSPC;
7701 }
7702
7703 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7704 &rsp->Buffer[nbytes];
7705 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7706
7707 nii_rsp->Capability = 0;
7708 if (netdev->real_num_tx_queues > 1)
7709 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7710 if (ksmbd_rdma_capable_netdev(netdev))
7711 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7712
7713 nii_rsp->Next = cpu_to_le32(152);
7714 nii_rsp->Reserved = 0;
7715
7716 if (netdev->ethtool_ops->get_link_ksettings) {
7717 struct ethtool_link_ksettings cmd;
7718
7719 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7720 speed = cmd.base.speed;
7721 } else {
7722 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7723 "speed is unknown, defaulting to 1Gb/sec");
7724 speed = SPEED_1000;
7725 }
7726
7727 speed *= 1000000;
7728 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7729
7730 sockaddr_storage = (struct sockaddr_storage_rsp *)
7731 nii_rsp->SockAddr_Storage;
7732 memset(sockaddr_storage, 0, 128);
7733
7734 if (!ipv4_set) {
7735 struct in_device *idev;
7736
7737 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7738 sockaddr_storage->addr4.Port = 0;
7739
7740 idev = __in_dev_get_rtnl(netdev);
7741 if (!idev)
7742 continue;
7743 sockaddr_storage->addr4.IPv4address =
7744 idev_ipv4_address(idev);
7745 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7746 ipv4_set = true;
7747 goto ipv6_retry;
7748 } else {
7749 struct inet6_dev *idev6;
7750 struct inet6_ifaddr *ifa;
7751 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7752
7753 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7754 sockaddr_storage->addr6.Port = 0;
7755 sockaddr_storage->addr6.FlowInfo = 0;
7756
7757 idev6 = __in6_dev_get(netdev);
7758 if (!idev6)
7759 continue;
7760
7761 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7762 if (ifa->flags & (IFA_F_TENTATIVE |
7763 IFA_F_DEPRECATED))
7764 continue;
7765 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7766 break;
7767 }
7768 sockaddr_storage->addr6.ScopeId = 0;
7769 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7770 }
7771 }
7772 rtnl_unlock();
7773
7774 /* zero if this is last one */
7775 if (nii_rsp)
7776 nii_rsp->Next = 0;
7777
7778 rsp->PersistentFileId = SMB2_NO_FID;
7779 rsp->VolatileFileId = SMB2_NO_FID;
7780 return nbytes;
7781 }
7782
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)7783 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7784 struct validate_negotiate_info_req *neg_req,
7785 struct validate_negotiate_info_rsp *neg_rsp,
7786 unsigned int in_buf_len)
7787 {
7788 int ret = 0;
7789 int dialect;
7790
7791 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7792 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7793 return -EINVAL;
7794
7795 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7796 neg_req->DialectCount);
7797 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7798 ret = -EINVAL;
7799 goto err_out;
7800 }
7801
7802 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7803 ret = -EINVAL;
7804 goto err_out;
7805 }
7806
7807 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7808 ret = -EINVAL;
7809 goto err_out;
7810 }
7811
7812 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7813 ret = -EINVAL;
7814 goto err_out;
7815 }
7816
7817 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7818 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7819 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7820 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7821 err_out:
7822 return ret;
7823 }
7824
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)7825 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7826 struct file_allocated_range_buffer *qar_req,
7827 struct file_allocated_range_buffer *qar_rsp,
7828 unsigned int in_count, unsigned int *out_count)
7829 {
7830 struct ksmbd_file *fp;
7831 loff_t start, length;
7832 int ret = 0;
7833
7834 *out_count = 0;
7835 if (in_count == 0)
7836 return -EINVAL;
7837
7838 start = le64_to_cpu(qar_req->file_offset);
7839 length = le64_to_cpu(qar_req->length);
7840
7841 if (start < 0 || length < 0)
7842 return -EINVAL;
7843
7844 fp = ksmbd_lookup_fd_fast(work, id);
7845 if (!fp)
7846 return -ENOENT;
7847
7848 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7849 qar_rsp, in_count, out_count);
7850 if (ret && ret != -E2BIG)
7851 *out_count = 0;
7852
7853 ksmbd_fd_put(work, fp);
7854 return ret;
7855 }
7856
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7857 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7858 unsigned int out_buf_len,
7859 struct smb2_ioctl_req *req,
7860 struct smb2_ioctl_rsp *rsp)
7861 {
7862 struct ksmbd_rpc_command *rpc_resp;
7863 char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);
7864 int nbytes = 0;
7865
7866 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7867 le32_to_cpu(req->InputCount));
7868 if (rpc_resp) {
7869 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7870 /*
7871 * set STATUS_SOME_NOT_MAPPED response
7872 * for unknown domain sid.
7873 */
7874 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7875 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7876 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7877 goto out;
7878 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7879 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7880 goto out;
7881 }
7882
7883 nbytes = rpc_resp->payload_sz;
7884 if (rpc_resp->payload_sz > out_buf_len) {
7885 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7886 nbytes = out_buf_len;
7887 }
7888
7889 if (!rpc_resp->payload_sz) {
7890 rsp->hdr.Status =
7891 STATUS_UNEXPECTED_IO_ERROR;
7892 goto out;
7893 }
7894
7895 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7896 }
7897 out:
7898 kvfree(rpc_resp);
7899 return nbytes;
7900 }
7901
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7902 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7903 struct file_sparse *sparse)
7904 {
7905 struct ksmbd_file *fp;
7906 struct mnt_idmap *idmap;
7907 int ret = 0;
7908 __le32 old_fattr;
7909
7910 fp = ksmbd_lookup_fd_fast(work, id);
7911 if (!fp)
7912 return -ENOENT;
7913 idmap = file_mnt_idmap(fp->filp);
7914
7915 old_fattr = fp->f_ci->m_fattr;
7916 if (sparse->SetSparse)
7917 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7918 else
7919 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7920
7921 if (fp->f_ci->m_fattr != old_fattr &&
7922 test_share_config_flag(work->tcon->share_conf,
7923 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7924 struct xattr_dos_attrib da;
7925
7926 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7927 fp->filp->f_path.dentry, &da);
7928 if (ret <= 0)
7929 goto out;
7930
7931 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7932 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7933 &fp->filp->f_path,
7934 &da, true);
7935 if (ret)
7936 fp->f_ci->m_fattr = old_fattr;
7937 }
7938
7939 out:
7940 ksmbd_fd_put(work, fp);
7941 return ret;
7942 }
7943
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7944 static int fsctl_request_resume_key(struct ksmbd_work *work,
7945 struct smb2_ioctl_req *req,
7946 struct resume_key_ioctl_rsp *key_rsp)
7947 {
7948 struct ksmbd_file *fp;
7949
7950 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7951 if (!fp)
7952 return -ENOENT;
7953
7954 memset(key_rsp, 0, sizeof(*key_rsp));
7955 key_rsp->ResumeKey[0] = req->VolatileFileId;
7956 key_rsp->ResumeKey[1] = req->PersistentFileId;
7957 ksmbd_fd_put(work, fp);
7958
7959 return 0;
7960 }
7961
7962 /**
7963 * smb2_ioctl() - handler for smb2 ioctl command
7964 * @work: smb work containing ioctl command buffer
7965 *
7966 * Return: 0 on success, otherwise error
7967 */
smb2_ioctl(struct ksmbd_work * work)7968 int smb2_ioctl(struct ksmbd_work *work)
7969 {
7970 struct smb2_ioctl_req *req;
7971 struct smb2_ioctl_rsp *rsp;
7972 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7973 u64 id = KSMBD_NO_FID;
7974 struct ksmbd_conn *conn = work->conn;
7975 int ret = 0;
7976 char *buffer;
7977
7978 if (work->next_smb2_rcv_hdr_off) {
7979 req = ksmbd_req_buf_next(work);
7980 rsp = ksmbd_resp_buf_next(work);
7981 if (!has_file_id(req->VolatileFileId)) {
7982 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7983 work->compound_fid);
7984 id = work->compound_fid;
7985 }
7986 } else {
7987 req = smb2_get_msg(work->request_buf);
7988 rsp = smb2_get_msg(work->response_buf);
7989 }
7990
7991 if (!has_file_id(id))
7992 id = req->VolatileFileId;
7993
7994 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7995 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7996 goto out;
7997 }
7998
7999 buffer = (char *)req + le32_to_cpu(req->InputOffset);
8000
8001 cnt_code = le32_to_cpu(req->CtlCode);
8002 ret = smb2_calc_max_out_buf_len(work, 48,
8003 le32_to_cpu(req->MaxOutputResponse));
8004 if (ret < 0) {
8005 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8006 goto out;
8007 }
8008 out_buf_len = (unsigned int)ret;
8009 in_buf_len = le32_to_cpu(req->InputCount);
8010
8011 switch (cnt_code) {
8012 case FSCTL_DFS_GET_REFERRALS:
8013 case FSCTL_DFS_GET_REFERRALS_EX:
8014 /* Not support DFS yet */
8015 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
8016 goto out;
8017 case FSCTL_CREATE_OR_GET_OBJECT_ID:
8018 {
8019 struct file_object_buf_type1_ioctl_rsp *obj_buf;
8020
8021 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
8022 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
8023 &rsp->Buffer[0];
8024
8025 /*
8026 * TODO: This is dummy implementation to pass smbtorture
8027 * Need to check correct response later
8028 */
8029 memset(obj_buf->ObjectId, 0x0, 16);
8030 memset(obj_buf->BirthVolumeId, 0x0, 16);
8031 memset(obj_buf->BirthObjectId, 0x0, 16);
8032 memset(obj_buf->DomainId, 0x0, 16);
8033
8034 break;
8035 }
8036 case FSCTL_PIPE_TRANSCEIVE:
8037 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
8038 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
8039 break;
8040 case FSCTL_VALIDATE_NEGOTIATE_INFO:
8041 if (conn->dialect < SMB30_PROT_ID) {
8042 ret = -EOPNOTSUPP;
8043 goto out;
8044 }
8045
8046 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
8047 Dialects)) {
8048 ret = -EINVAL;
8049 goto out;
8050 }
8051
8052 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
8053 ret = -EINVAL;
8054 goto out;
8055 }
8056
8057 ret = fsctl_validate_negotiate_info(conn,
8058 (struct validate_negotiate_info_req *)buffer,
8059 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
8060 in_buf_len);
8061 if (ret < 0)
8062 goto out;
8063
8064 nbytes = sizeof(struct validate_negotiate_info_rsp);
8065 rsp->PersistentFileId = SMB2_NO_FID;
8066 rsp->VolatileFileId = SMB2_NO_FID;
8067 break;
8068 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
8069 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
8070 if (ret < 0)
8071 goto out;
8072 nbytes = ret;
8073 break;
8074 case FSCTL_REQUEST_RESUME_KEY:
8075 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
8076 ret = -EINVAL;
8077 goto out;
8078 }
8079
8080 ret = fsctl_request_resume_key(work, req,
8081 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
8082 if (ret < 0)
8083 goto out;
8084 rsp->PersistentFileId = req->PersistentFileId;
8085 rsp->VolatileFileId = req->VolatileFileId;
8086 nbytes = sizeof(struct resume_key_ioctl_rsp);
8087 break;
8088 case FSCTL_COPYCHUNK:
8089 case FSCTL_COPYCHUNK_WRITE:
8090 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8091 ksmbd_debug(SMB,
8092 "User does not have write permission\n");
8093 ret = -EACCES;
8094 goto out;
8095 }
8096
8097 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
8098 ret = -EINVAL;
8099 goto out;
8100 }
8101
8102 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
8103 ret = -EINVAL;
8104 goto out;
8105 }
8106
8107 nbytes = sizeof(struct copychunk_ioctl_rsp);
8108 rsp->VolatileFileId = req->VolatileFileId;
8109 rsp->PersistentFileId = req->PersistentFileId;
8110 fsctl_copychunk(work,
8111 (struct copychunk_ioctl_req *)buffer,
8112 le32_to_cpu(req->CtlCode),
8113 le32_to_cpu(req->InputCount),
8114 req->VolatileFileId,
8115 req->PersistentFileId,
8116 rsp);
8117 break;
8118 case FSCTL_SET_SPARSE:
8119 if (in_buf_len < sizeof(struct file_sparse)) {
8120 ret = -EINVAL;
8121 goto out;
8122 }
8123
8124 ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);
8125 if (ret < 0)
8126 goto out;
8127 break;
8128 case FSCTL_SET_ZERO_DATA:
8129 {
8130 struct file_zero_data_information *zero_data;
8131 struct ksmbd_file *fp;
8132 loff_t off, len, bfz;
8133
8134 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
8135 ksmbd_debug(SMB,
8136 "User does not have write permission\n");
8137 ret = -EACCES;
8138 goto out;
8139 }
8140
8141 if (in_buf_len < sizeof(struct file_zero_data_information)) {
8142 ret = -EINVAL;
8143 goto out;
8144 }
8145
8146 zero_data =
8147 (struct file_zero_data_information *)buffer;
8148
8149 off = le64_to_cpu(zero_data->FileOffset);
8150 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
8151 if (off < 0 || bfz < 0 || off > bfz) {
8152 ret = -EINVAL;
8153 goto out;
8154 }
8155
8156 len = bfz - off;
8157 if (len) {
8158 fp = ksmbd_lookup_fd_fast(work, id);
8159 if (!fp) {
8160 ret = -ENOENT;
8161 goto out;
8162 }
8163
8164 ret = ksmbd_vfs_zero_data(work, fp, off, len);
8165 ksmbd_fd_put(work, fp);
8166 if (ret < 0)
8167 goto out;
8168 }
8169 break;
8170 }
8171 case FSCTL_QUERY_ALLOCATED_RANGES:
8172 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
8173 ret = -EINVAL;
8174 goto out;
8175 }
8176
8177 ret = fsctl_query_allocated_ranges(work, id,
8178 (struct file_allocated_range_buffer *)buffer,
8179 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
8180 out_buf_len /
8181 sizeof(struct file_allocated_range_buffer), &nbytes);
8182 if (ret == -E2BIG) {
8183 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
8184 } else if (ret < 0) {
8185 nbytes = 0;
8186 goto out;
8187 }
8188
8189 nbytes *= sizeof(struct file_allocated_range_buffer);
8190 break;
8191 case FSCTL_GET_REPARSE_POINT:
8192 {
8193 struct reparse_data_buffer *reparse_ptr;
8194 struct ksmbd_file *fp;
8195
8196 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
8197 fp = ksmbd_lookup_fd_fast(work, id);
8198 if (!fp) {
8199 pr_err("not found fp!!\n");
8200 ret = -ENOENT;
8201 goto out;
8202 }
8203
8204 reparse_ptr->ReparseTag =
8205 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
8206 reparse_ptr->ReparseDataLength = 0;
8207 ksmbd_fd_put(work, fp);
8208 nbytes = sizeof(struct reparse_data_buffer);
8209 break;
8210 }
8211 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
8212 {
8213 struct ksmbd_file *fp_in, *fp_out = NULL;
8214 struct duplicate_extents_to_file *dup_ext;
8215 loff_t src_off, dst_off, length, cloned;
8216
8217 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
8218 ret = -EINVAL;
8219 goto out;
8220 }
8221
8222 dup_ext = (struct duplicate_extents_to_file *)buffer;
8223
8224 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
8225 dup_ext->PersistentFileHandle);
8226 if (!fp_in) {
8227 pr_err("not found file handle in duplicate extent to file\n");
8228 ret = -ENOENT;
8229 goto out;
8230 }
8231
8232 fp_out = ksmbd_lookup_fd_fast(work, id);
8233 if (!fp_out) {
8234 pr_err("not found fp\n");
8235 ret = -ENOENT;
8236 goto dup_ext_out;
8237 }
8238
8239 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
8240 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
8241 length = le64_to_cpu(dup_ext->ByteCount);
8242 /*
8243 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
8244 * should fall back to vfs_copy_file_range(). This could be
8245 * beneficial when re-exporting nfs/smb mount, but note that
8246 * this can result in partial copy that returns an error status.
8247 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
8248 * fall back to vfs_copy_file_range(), should be avoided when
8249 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
8250 */
8251 cloned = vfs_clone_file_range(fp_in->filp, src_off,
8252 fp_out->filp, dst_off, length, 0);
8253 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
8254 ret = -EOPNOTSUPP;
8255 goto dup_ext_out;
8256 } else if (cloned != length) {
8257 cloned = vfs_copy_file_range(fp_in->filp, src_off,
8258 fp_out->filp, dst_off,
8259 length, 0);
8260 if (cloned != length) {
8261 if (cloned < 0)
8262 ret = cloned;
8263 else
8264 ret = -EINVAL;
8265 }
8266 }
8267
8268 dup_ext_out:
8269 ksmbd_fd_put(work, fp_in);
8270 ksmbd_fd_put(work, fp_out);
8271 if (ret < 0)
8272 goto out;
8273 break;
8274 }
8275 default:
8276 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
8277 cnt_code);
8278 ret = -EOPNOTSUPP;
8279 goto out;
8280 }
8281
8282 rsp->CtlCode = cpu_to_le32(cnt_code);
8283 rsp->InputCount = cpu_to_le32(0);
8284 rsp->InputOffset = cpu_to_le32(112);
8285 rsp->OutputOffset = cpu_to_le32(112);
8286 rsp->OutputCount = cpu_to_le32(nbytes);
8287 rsp->StructureSize = cpu_to_le16(49);
8288 rsp->Reserved = cpu_to_le16(0);
8289 rsp->Flags = cpu_to_le32(0);
8290 rsp->Reserved2 = cpu_to_le32(0);
8291 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
8292 if (!ret)
8293 return ret;
8294
8295 out:
8296 if (ret == -EACCES)
8297 rsp->hdr.Status = STATUS_ACCESS_DENIED;
8298 else if (ret == -ENOENT)
8299 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
8300 else if (ret == -EOPNOTSUPP)
8301 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
8302 else if (ret == -ENOSPC)
8303 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
8304 else if (ret < 0 || rsp->hdr.Status == 0)
8305 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8306 smb2_set_err_rsp(work);
8307 return 0;
8308 }
8309
8310 /**
8311 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
8312 * @work: smb work containing oplock break command buffer
8313 *
8314 * Return: 0
8315 */
smb20_oplock_break_ack(struct ksmbd_work * work)8316 static void smb20_oplock_break_ack(struct ksmbd_work *work)
8317 {
8318 struct smb2_oplock_break *req;
8319 struct smb2_oplock_break *rsp;
8320 struct ksmbd_file *fp;
8321 struct oplock_info *opinfo = NULL;
8322 __le32 err = 0;
8323 int ret = 0;
8324 u64 volatile_id, persistent_id;
8325 char req_oplevel = 0, rsp_oplevel = 0;
8326 unsigned int oplock_change_type;
8327
8328 WORK_BUFFERS(work, req, rsp);
8329
8330 volatile_id = req->VolatileFid;
8331 persistent_id = req->PersistentFid;
8332 req_oplevel = req->OplockLevel;
8333 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8334 volatile_id, persistent_id, req_oplevel);
8335
8336 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8337 if (!fp) {
8338 rsp->hdr.Status = STATUS_FILE_CLOSED;
8339 smb2_set_err_rsp(work);
8340 return;
8341 }
8342
8343 opinfo = opinfo_get(fp);
8344 if (!opinfo) {
8345 pr_err("unexpected null oplock_info\n");
8346 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8347 smb2_set_err_rsp(work);
8348 ksmbd_fd_put(work, fp);
8349 return;
8350 }
8351
8352 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8353 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8354 goto err_out;
8355 }
8356
8357 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8358 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8359 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8360 goto err_out;
8361 }
8362
8363 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8364 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8365 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8366 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8367 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8368 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8369 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8370 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8371 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8372 oplock_change_type = OPLOCK_READ_TO_NONE;
8373 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8374 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8375 err = STATUS_INVALID_DEVICE_STATE;
8376 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8377 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8378 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8379 oplock_change_type = OPLOCK_WRITE_TO_READ;
8380 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8381 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8382 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8383 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8384 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8385 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8386 oplock_change_type = OPLOCK_READ_TO_NONE;
8387 } else {
8388 oplock_change_type = 0;
8389 }
8390 } else {
8391 oplock_change_type = 0;
8392 }
8393
8394 switch (oplock_change_type) {
8395 case OPLOCK_WRITE_TO_READ:
8396 ret = opinfo_write_to_read(opinfo);
8397 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8398 break;
8399 case OPLOCK_WRITE_TO_NONE:
8400 ret = opinfo_write_to_none(opinfo);
8401 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8402 break;
8403 case OPLOCK_READ_TO_NONE:
8404 ret = opinfo_read_to_none(opinfo);
8405 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8406 break;
8407 default:
8408 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8409 opinfo->level, rsp_oplevel);
8410 }
8411
8412 if (ret < 0) {
8413 rsp->hdr.Status = err;
8414 goto err_out;
8415 }
8416
8417 opinfo->op_state = OPLOCK_STATE_NONE;
8418 wake_up_interruptible_all(&opinfo->oplock_q);
8419 opinfo_put(opinfo);
8420 ksmbd_fd_put(work, fp);
8421
8422 rsp->StructureSize = cpu_to_le16(24);
8423 rsp->OplockLevel = rsp_oplevel;
8424 rsp->Reserved = 0;
8425 rsp->Reserved2 = 0;
8426 rsp->VolatileFid = volatile_id;
8427 rsp->PersistentFid = persistent_id;
8428 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8429 if (!ret)
8430 return;
8431
8432 err_out:
8433 opinfo->op_state = OPLOCK_STATE_NONE;
8434 wake_up_interruptible_all(&opinfo->oplock_q);
8435
8436 opinfo_put(opinfo);
8437 ksmbd_fd_put(work, fp);
8438 smb2_set_err_rsp(work);
8439 }
8440
check_lease_state(struct lease * lease,__le32 req_state)8441 static int check_lease_state(struct lease *lease, __le32 req_state)
8442 {
8443 if ((lease->new_state ==
8444 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8445 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8446 lease->new_state = req_state;
8447 return 0;
8448 }
8449
8450 if (lease->new_state == req_state)
8451 return 0;
8452
8453 return 1;
8454 }
8455
8456 /**
8457 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8458 * @work: smb work containing lease break command buffer
8459 *
8460 * Return: 0
8461 */
smb21_lease_break_ack(struct ksmbd_work * work)8462 static void smb21_lease_break_ack(struct ksmbd_work *work)
8463 {
8464 struct ksmbd_conn *conn = work->conn;
8465 struct smb2_lease_ack *req;
8466 struct smb2_lease_ack *rsp;
8467 struct oplock_info *opinfo;
8468 __le32 err = 0;
8469 int ret = 0;
8470 unsigned int lease_change_type;
8471 __le32 lease_state;
8472 struct lease *lease;
8473
8474 WORK_BUFFERS(work, req, rsp);
8475
8476 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8477 le32_to_cpu(req->LeaseState));
8478 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8479 if (!opinfo) {
8480 ksmbd_debug(OPLOCK, "file not opened\n");
8481 smb2_set_err_rsp(work);
8482 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8483 return;
8484 }
8485 lease = opinfo->o_lease;
8486
8487 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8488 pr_err("unexpected lease break state 0x%x\n",
8489 opinfo->op_state);
8490 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8491 goto err_out;
8492 }
8493
8494 if (check_lease_state(lease, req->LeaseState)) {
8495 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8496 ksmbd_debug(OPLOCK,
8497 "req lease state: 0x%x, expected state: 0x%x\n",
8498 req->LeaseState, lease->new_state);
8499 goto err_out;
8500 }
8501
8502 if (!atomic_read(&opinfo->breaking_cnt)) {
8503 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8504 goto err_out;
8505 }
8506
8507 /* check for bad lease state */
8508 if (req->LeaseState &
8509 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8510 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8511 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8512 lease_change_type = OPLOCK_WRITE_TO_NONE;
8513 else
8514 lease_change_type = OPLOCK_READ_TO_NONE;
8515 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8516 le32_to_cpu(lease->state),
8517 le32_to_cpu(req->LeaseState));
8518 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8519 req->LeaseState != SMB2_LEASE_NONE_LE) {
8520 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8521 lease_change_type = OPLOCK_READ_TO_NONE;
8522 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8523 le32_to_cpu(lease->state),
8524 le32_to_cpu(req->LeaseState));
8525 } else {
8526 /* valid lease state changes */
8527 err = STATUS_INVALID_DEVICE_STATE;
8528 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8529 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8530 lease_change_type = OPLOCK_WRITE_TO_NONE;
8531 else
8532 lease_change_type = OPLOCK_READ_TO_NONE;
8533 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8534 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8535 lease_change_type = OPLOCK_WRITE_TO_READ;
8536 else
8537 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8538 } else {
8539 lease_change_type = 0;
8540 }
8541 }
8542
8543 switch (lease_change_type) {
8544 case OPLOCK_WRITE_TO_READ:
8545 ret = opinfo_write_to_read(opinfo);
8546 break;
8547 case OPLOCK_READ_HANDLE_TO_READ:
8548 ret = opinfo_read_handle_to_read(opinfo);
8549 break;
8550 case OPLOCK_WRITE_TO_NONE:
8551 ret = opinfo_write_to_none(opinfo);
8552 break;
8553 case OPLOCK_READ_TO_NONE:
8554 ret = opinfo_read_to_none(opinfo);
8555 break;
8556 default:
8557 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8558 le32_to_cpu(lease->state),
8559 le32_to_cpu(req->LeaseState));
8560 }
8561
8562 if (ret < 0) {
8563 rsp->hdr.Status = err;
8564 goto err_out;
8565 }
8566
8567 lease_state = lease->state;
8568 opinfo->op_state = OPLOCK_STATE_NONE;
8569 wake_up_interruptible_all(&opinfo->oplock_q);
8570 atomic_dec(&opinfo->breaking_cnt);
8571 wake_up_interruptible_all(&opinfo->oplock_brk);
8572 opinfo_put(opinfo);
8573
8574 rsp->StructureSize = cpu_to_le16(36);
8575 rsp->Reserved = 0;
8576 rsp->Flags = 0;
8577 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8578 rsp->LeaseState = lease_state;
8579 rsp->LeaseDuration = 0;
8580 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8581 if (!ret)
8582 return;
8583
8584 err_out:
8585 wake_up_interruptible_all(&opinfo->oplock_q);
8586 atomic_dec(&opinfo->breaking_cnt);
8587 wake_up_interruptible_all(&opinfo->oplock_brk);
8588
8589 opinfo_put(opinfo);
8590 smb2_set_err_rsp(work);
8591 }
8592
8593 /**
8594 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8595 * @work: smb work containing oplock/lease break command buffer
8596 *
8597 * Return: 0
8598 */
smb2_oplock_break(struct ksmbd_work * work)8599 int smb2_oplock_break(struct ksmbd_work *work)
8600 {
8601 struct smb2_oplock_break *req;
8602 struct smb2_oplock_break *rsp;
8603
8604 WORK_BUFFERS(work, req, rsp);
8605
8606 switch (le16_to_cpu(req->StructureSize)) {
8607 case OP_BREAK_STRUCT_SIZE_20:
8608 smb20_oplock_break_ack(work);
8609 break;
8610 case OP_BREAK_STRUCT_SIZE_21:
8611 smb21_lease_break_ack(work);
8612 break;
8613 default:
8614 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8615 le16_to_cpu(req->StructureSize));
8616 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8617 smb2_set_err_rsp(work);
8618 }
8619
8620 return 0;
8621 }
8622
8623 /**
8624 * smb2_notify() - handler for smb2 notify request
8625 * @work: smb work containing notify command buffer
8626 *
8627 * Return: 0
8628 */
smb2_notify(struct ksmbd_work * work)8629 int smb2_notify(struct ksmbd_work *work)
8630 {
8631 struct smb2_change_notify_req *req;
8632 struct smb2_change_notify_rsp *rsp;
8633
8634 WORK_BUFFERS(work, req, rsp);
8635
8636 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8637 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8638 smb2_set_err_rsp(work);
8639 return 0;
8640 }
8641
8642 smb2_set_err_rsp(work);
8643 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8644 return 0;
8645 }
8646
8647 /**
8648 * smb2_is_sign_req() - handler for checking packet signing status
8649 * @work: smb work containing notify command buffer
8650 * @command: SMB2 command id
8651 *
8652 * Return: true if packed is signed, false otherwise
8653 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8654 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8655 {
8656 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8657
8658 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8659 command != SMB2_NEGOTIATE_HE &&
8660 command != SMB2_SESSION_SETUP_HE &&
8661 command != SMB2_OPLOCK_BREAK_HE)
8662 return true;
8663
8664 return false;
8665 }
8666
8667 /**
8668 * smb2_check_sign_req() - handler for req packet sign processing
8669 * @work: smb work containing notify command buffer
8670 *
8671 * Return: 1 on success, 0 otherwise
8672 */
smb2_check_sign_req(struct ksmbd_work * work)8673 int smb2_check_sign_req(struct ksmbd_work *work)
8674 {
8675 struct smb2_hdr *hdr;
8676 char signature_req[SMB2_SIGNATURE_SIZE];
8677 char signature[SMB2_HMACSHA256_SIZE];
8678 struct kvec iov[1];
8679 size_t len;
8680
8681 hdr = smb2_get_msg(work->request_buf);
8682 if (work->next_smb2_rcv_hdr_off)
8683 hdr = ksmbd_req_buf_next(work);
8684
8685 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8686 len = get_rfc1002_len(work->request_buf);
8687 else if (hdr->NextCommand)
8688 len = le32_to_cpu(hdr->NextCommand);
8689 else
8690 len = get_rfc1002_len(work->request_buf) -
8691 work->next_smb2_rcv_hdr_off;
8692
8693 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8694 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8695
8696 iov[0].iov_base = (char *)&hdr->ProtocolId;
8697 iov[0].iov_len = len;
8698
8699 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8700 signature))
8701 return 0;
8702
8703 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8704 pr_err("bad smb2 signature\n");
8705 return 0;
8706 }
8707
8708 return 1;
8709 }
8710
8711 /**
8712 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8713 * @work: smb work containing notify command buffer
8714 *
8715 */
smb2_set_sign_rsp(struct ksmbd_work * work)8716 void smb2_set_sign_rsp(struct ksmbd_work *work)
8717 {
8718 struct smb2_hdr *hdr;
8719 char signature[SMB2_HMACSHA256_SIZE];
8720 struct kvec *iov;
8721 int n_vec = 1;
8722
8723 hdr = ksmbd_resp_buf_curr(work);
8724 hdr->Flags |= SMB2_FLAGS_SIGNED;
8725 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8726
8727 if (hdr->Command == SMB2_READ) {
8728 iov = &work->iov[work->iov_idx - 1];
8729 n_vec++;
8730 } else {
8731 iov = &work->iov[work->iov_idx];
8732 }
8733
8734 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8735 signature))
8736 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8737 }
8738
8739 /**
8740 * smb3_check_sign_req() - handler for req packet sign processing
8741 * @work: smb work containing notify command buffer
8742 *
8743 * Return: 1 on success, 0 otherwise
8744 */
smb3_check_sign_req(struct ksmbd_work * work)8745 int smb3_check_sign_req(struct ksmbd_work *work)
8746 {
8747 struct ksmbd_conn *conn = work->conn;
8748 char *signing_key;
8749 struct smb2_hdr *hdr;
8750 struct channel *chann;
8751 char signature_req[SMB2_SIGNATURE_SIZE];
8752 char signature[SMB2_CMACAES_SIZE];
8753 struct kvec iov[1];
8754 size_t len;
8755
8756 hdr = smb2_get_msg(work->request_buf);
8757 if (work->next_smb2_rcv_hdr_off)
8758 hdr = ksmbd_req_buf_next(work);
8759
8760 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8761 len = get_rfc1002_len(work->request_buf);
8762 else if (hdr->NextCommand)
8763 len = le32_to_cpu(hdr->NextCommand);
8764 else
8765 len = get_rfc1002_len(work->request_buf) -
8766 work->next_smb2_rcv_hdr_off;
8767
8768 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8769 signing_key = work->sess->smb3signingkey;
8770 } else {
8771 chann = lookup_chann_list(work->sess, conn);
8772 if (!chann) {
8773 return 0;
8774 }
8775 signing_key = chann->smb3signingkey;
8776 }
8777
8778 if (!signing_key) {
8779 pr_err("SMB3 signing key is not generated\n");
8780 return 0;
8781 }
8782
8783 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8784 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8785 iov[0].iov_base = (char *)&hdr->ProtocolId;
8786 iov[0].iov_len = len;
8787
8788 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8789 return 0;
8790
8791 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8792 pr_err("bad smb2 signature\n");
8793 return 0;
8794 }
8795
8796 return 1;
8797 }
8798
8799 /**
8800 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8801 * @work: smb work containing notify command buffer
8802 *
8803 */
smb3_set_sign_rsp(struct ksmbd_work * work)8804 void smb3_set_sign_rsp(struct ksmbd_work *work)
8805 {
8806 struct ksmbd_conn *conn = work->conn;
8807 struct smb2_hdr *hdr;
8808 struct channel *chann;
8809 char signature[SMB2_CMACAES_SIZE];
8810 struct kvec *iov;
8811 int n_vec = 1;
8812 char *signing_key;
8813
8814 hdr = ksmbd_resp_buf_curr(work);
8815
8816 if (conn->binding == false &&
8817 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8818 signing_key = work->sess->smb3signingkey;
8819 } else {
8820 chann = lookup_chann_list(work->sess, work->conn);
8821 if (!chann) {
8822 return;
8823 }
8824 signing_key = chann->smb3signingkey;
8825 }
8826
8827 if (!signing_key)
8828 return;
8829
8830 hdr->Flags |= SMB2_FLAGS_SIGNED;
8831 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8832
8833 if (hdr->Command == SMB2_READ) {
8834 iov = &work->iov[work->iov_idx - 1];
8835 n_vec++;
8836 } else {
8837 iov = &work->iov[work->iov_idx];
8838 }
8839
8840 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8841 signature))
8842 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8843 }
8844
8845 /**
8846 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8847 * @work: smb work containing response buffer
8848 *
8849 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8850 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8851 {
8852 struct ksmbd_conn *conn = work->conn;
8853 struct ksmbd_session *sess = work->sess;
8854 struct smb2_hdr *req, *rsp;
8855
8856 if (conn->dialect != SMB311_PROT_ID)
8857 return;
8858
8859 WORK_BUFFERS(work, req, rsp);
8860
8861 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8862 conn->preauth_info)
8863 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8864 conn->preauth_info->Preauth_HashValue);
8865
8866 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8867 __u8 *hash_value;
8868
8869 if (conn->binding) {
8870 struct preauth_session *preauth_sess;
8871
8872 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8873 if (!preauth_sess)
8874 return;
8875 hash_value = preauth_sess->Preauth_HashValue;
8876 } else {
8877 hash_value = sess->Preauth_HashValue;
8878 if (!hash_value)
8879 return;
8880 }
8881 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8882 hash_value);
8883 }
8884 }
8885
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8886 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8887 {
8888 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8889 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8890 unsigned int orig_len = get_rfc1002_len(old_buf);
8891
8892 /* tr_buf must be cleared by the caller */
8893 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8894 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8895 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8896 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8897 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8898 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8899 else
8900 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8901 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8902 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8903 inc_rfc1001_len(tr_buf, orig_len);
8904 }
8905
smb3_encrypt_resp(struct ksmbd_work * work)8906 int smb3_encrypt_resp(struct ksmbd_work *work)
8907 {
8908 struct kvec *iov = work->iov;
8909 int rc = -ENOMEM;
8910 void *tr_buf;
8911
8912 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8913 if (!tr_buf)
8914 return rc;
8915
8916 /* fill transform header */
8917 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8918
8919 iov[0].iov_base = tr_buf;
8920 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8921 work->tr_buf = tr_buf;
8922
8923 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8924 }
8925
smb3_is_transform_hdr(void * buf)8926 bool smb3_is_transform_hdr(void *buf)
8927 {
8928 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8929
8930 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8931 }
8932
smb3_decrypt_req(struct ksmbd_work * work)8933 int smb3_decrypt_req(struct ksmbd_work *work)
8934 {
8935 struct ksmbd_session *sess;
8936 char *buf = work->request_buf;
8937 unsigned int pdu_length = get_rfc1002_len(buf);
8938 struct kvec iov[2];
8939 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8940 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8941 int rc = 0;
8942
8943 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8944 buf_data_size < sizeof(struct smb2_hdr)) {
8945 pr_err("Transform message is too small (%u)\n",
8946 pdu_length);
8947 return -ECONNABORTED;
8948 }
8949
8950 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8951 pr_err("Transform message is broken\n");
8952 return -ECONNABORTED;
8953 }
8954
8955 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8956 if (!sess) {
8957 pr_err("invalid session id(%llx) in transform header\n",
8958 le64_to_cpu(tr_hdr->SessionId));
8959 return -ECONNABORTED;
8960 }
8961
8962 iov[0].iov_base = buf;
8963 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8964 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8965 iov[1].iov_len = buf_data_size;
8966 rc = ksmbd_crypt_message(work, iov, 2, 0);
8967 if (rc)
8968 return rc;
8969
8970 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8971 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8972
8973 return rc;
8974 }
8975
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8976 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8977 {
8978 struct ksmbd_conn *conn = work->conn;
8979 struct ksmbd_session *sess = work->sess;
8980 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8981
8982 if (conn->dialect < SMB30_PROT_ID)
8983 return false;
8984
8985 if (work->next_smb2_rcv_hdr_off)
8986 rsp = ksmbd_resp_buf_next(work);
8987
8988 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8989 sess->user && !user_guest(sess->user) &&
8990 rsp->Status == STATUS_SUCCESS)
8991 return true;
8992 return false;
8993 }
8994